CN1444305A

CN1444305A - Repeatedly chargeable-dischargeable lighium ion power cell and its production method

Info

Publication number: CN1444305A
Application number: CN02107211A
Authority: CN
Inventors: 居永明
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-08
Filing date: 2002-03-08
Publication date: 2003-09-24
Anticipated expiration: 2022-03-08
Also published as: WO2003077349A1; AU2003221287A1; CN1320684C

Abstract

A repeated charge/discharge Li ionic power battery is composed of a cover, negative poles safety valve, positive poles, electrolyte, and a shell, the positive pole is connected with the positive, the negative pole with the negative, a certain thickness of Al foil is selected-coated uniformly with positive/active subject on both sides as the positive and a copper foil in a thickness is coated uniformly with negative active subject on both sides as the negative characterizing in that positive, negative and membrane make up of a pole collector with multilayer, orderly arranged positive/negative rectangular plates with big leaf single pole ear of multipole ear to derice current to the poles, both having one or several poles which number and diameter can be equal or not.

Description

Rechargeable lithium-ion-power cell and manufacture method thereof

Technical field

The present invention relates to a kind of environment-friendly battery that can repeated charge, more specifically, the present invention relates to a kind of lithium-ion-power cell and manufacture method thereof that can repeated charge.

Background technology

Because environmental protection and requirements of saving energy, the world today is more and more urgent to the demand of the energy, therefore seeks high efficiency and clean power source, is the inexorable trend of social development and scientific and technological progress.

There have been a lot of researchs to set foot in the electrokinetic cell field.Current common electrokinetic cell has lead-acid battery, nickel-cadmium cell, Ni-MH battery, sodium-sulphur battery etc.But because its energy density is low, the charging interval is long, and can not satisfy the high-power demand that discharges and recharges.Directly influence the practicality of these electrokinetic cells.In the last few years, zinc-air cell, lithium ion battery, Proton Exchange Membrane Fuel Cells etc. all were considered to the best power source battery as the electrokinetic cell development.But owing to can't satisfy the high-power requirement that discharges and recharges, so its practicality problem has seriously hindered the practical application of electrokinetic cell.

Chinese patent application 001013564 discloses " a kind of rechargeable Cr-F-Li solid electrokinetic cell ".Nominally though be rechargeable Cr-F-Li solid electrokinetic cell, in fact its structure and component are all fully not open, therefore do not have practicality and using value substantially, and fundamentally do not solve the high-power problem that discharges and recharges.The greatest problem of lithium-ion-power cell is the heat that produces in the charge and discharge process, and this heat that in charge and discharge process, produces to lithium-ion-power cell be have very big dysgenic.

Therefore, the purpose of this invention is to provide a kind of lithium-ion-power cell that can repeated charge, it can solve the high-power problem that discharges and recharges of lithium-ion-power cell.

Summary of the invention

The invention belongs to a kind of environment-friendly battery that can repeated charge, purpose be wish with design is arranged unique current collection (afflux) terminal be positive/negative plate and the barrier film of Da Ye lug common constitute have multiple lamination structure, the positive and negative plate sequence interval is put neat electrode aggregate, internally press the high-power repeated charge requirement of the better current collection clamping plate solution of responsive thereby more reliable, safer more safety valve, afflux performance, heat dispersion lithium-ion-power cell, thereby the extensive use of realization lithium-ion-power cell.

The invention provides a kind of rechargeable lithium-ion-power cell, each cell is made up of cover plate, negative pole pole, safety valve, Positive Poles, current collection clamping plate, interior body, electrolyte, cylindrical or square (comprising rectangle) shell, it is characterized in that: interior body series is that positive plate, negative plate and barrier film constitute the electrode aggregate with disk-like structure jointly by the positive/negative plate group; Positive Poles is connected with positive pole, and the negative pole pole then is connected with negative pole; Positive pole is selected certain thickness aluminium foil for use, and the two sides evenly is coated with positive active material, and negative pole is selected certain thickness Copper Foil for use, and the two sides evenly is coated with negative electrode active material; The pole piece form of negative or positive electrode is the long and narrow rectangular sheet (being called the generate sheet again) of shape that has the multipole ear of Da Ye that Da Ye monopole ear or spacing do not wait, and Da Ye monopole ear, the multipole ear of Da Ye are referred to as the Da Ye lug again.The Da Ye lug can be the Tibetan hair style also for raising hair style both, and passed through current collection clamping plate derived current to pole; Positive pole has one or several poles, and negative pole has one or several poles, and the quantity of positive and negative terminals can equate also can not wait, and the diameter of pole can equate also can not wait.

The present invention has adopted the structure of the Da Ye lug that can lower current density, and its () can avoid resulting from the very harmful heat of lithium-ion-power cell to greatest extent.

The present invention also provides a kind of safety valve that is used for rechargeable lithium-ion-power cell, stage clip wherein is loaded in the endoporus of regulating bolt, the endoporus of regulating bolt is used to keep the stable of stage clip, sealed steel ball, stage clip can vertically slippage up and down in regulating the endoporus of bolt, sealed steel ball can vertically slippage up and down in regulating the endoporus of bolt, regulates on the external diameter of bolt and is processed with the screw thread that matches with the safety valve body; Regulate bolt and be processed with some vertical air discharge ducts, then have steam vent in the bottom of air discharge duct; Stage clip is pressed in the top of steel ball, and the bottom hole of sealed steel ball then falls on the fluorine rubber ring that is pressed on the cover plate liquid injection port; The pressure relief vent of safety valve bottom communicates with the liquid injection hole on the cover plate.

The present invention also provides a kind of proportioning and manufacture method thereof of rechargeable lithium-ion-power cell, may further comprise the steps: batching-→ coating (slurry)-→ section (, then not having welding lug operation) if directly cut lug-→ roll extrusion-→ making (welding) lug-→ reel (comprise the dress shell, seal)-→ fluid injection-→ change into-→ partial volume.

Current collection (afflux) terminal that it is unique that the present invention has design is that the positive/negative plate of Da Ye lug is wound on simultaneously with barrier film and the interior body that constitutes, internally presses the high-power repeated charge requirement of the better current collection clamping plate solution of responsive thereby more reliable, safer more safety valve, afflux performance, heat dispersion lithium-ion-power cell, thus the extensive use of realization lithium-ion-power cell.

Description of drawings

Below in conjunction with accompanying drawing, specifically describe the present invention, identical Reference numeral is represented identical parts among the figure.Wherein:

Fig. 1-1 is the cutaway view of laminated type lithium-ion-power cell;

Fig. 1-2 represents the vertical view of laminated type lithium-ion-power cell;

Figure 1A, 1A-1,1B, 1B-1,1C, 1C-1,1D, 1D-1,1E, 1E-1 represent the schematic diagram of Da Ye lug on pole piece respectively;

Shown in Figure 2 then is the cutaway view of lithium-ion-power cell of the present invention;

Fig. 3 and Fig. 4 are the mode that stacks of the pole piece in the lithium-ion-power cell of the present invention;

Fig. 5 and Fig. 6 represent the structure of compressed spring type and compressing tablet formula safety valve respectively.

Embodiment

Say from outward appearance, the basic comprising of lithium-ion-power cell as Figure 1-1, each cell system is made up of cover plate 1, negative pole pole 2, safety valve 3, Positive Poles 4 and uncovered shell 9; And in the inner chamber of lithium-ion-power cell, current collection clamping plate (also claiming the pole piece clamping plate) 6, electrolyte 8, negative plate 12, positive plate 13 and barrier film 19 (or 19-1) are arranged then.Negative terminal 2 on shell 9, the cover plate 1, safety valve 3, positive terminal 4 constitute the outer body of lithium-ion-power cell; Many to the positive/negative plate group, barrier film, current collection clamping plate constitute the interior body 7 (also claiming laminated body) of lithium-ion-power cell.Now that structure, manufacture craft (method) division of laminated type lithium-ion-power cell is as follows:

The structure of laminated type lithium-ion-power cell

In the laminated type of lithium-ion-power cell body 7 be by one or more pairs of positive/negative plate groups and barrier film constitute jointly have multiple lamination structure, electrode aggregate that the storing of positive and negative plate sequence interval is neat.Minimum lithium-ion-power cell can be made up of a pair of positive/negative plate group and barrier film.

Anodal 13 is to form (not shown) by aluminium foil, positive active material, and aluminium foil is the metal forming of thin slice, and the two sides evenly has been coated with positive active material (both can be cobalt acid lithium, also can be LiMn2O4 or lithium nickelate, lithium nickel cobalt dioxide).The surface of aluminium foil is smoother usually, but the comparatively coarse aluminium foil in surface is for the coating active material, and adhesive force is better.Comparatively Shi Yi aluminum foil thickness scope is 10 μ m～80 μ m, when the area of anode pole piece be less than or equal to 1000mm * 500mm and more than or equal to 100mm * 50mm, discharge and recharge when requiring 1C～2C, get rid of other influencing factors, the optimum thickness of selecting aluminium foil for use is 15 μ m～25 μ m; Discharge and recharge and require 2C～3C or when bigger, get rid of other influencing factors, the optimum thickness of selecting aluminium foil for use be 20 μ m～45 μ m or more than.

Negative pole 12 is to form (not shown) by Copper Foil, negative electrode active material, Copper Foil is the metal forming of thin slice, and the two sides evenly has been coated with the collector body of negative electrode active material (both can be native graphite, also can be crystalline flake graphite, Delanium or petroleum coke).The surface of Copper Foil is smoother usually, but the comparatively coarse Copper Foil in surface is for the coating active material, and adhesive force is better.Comparatively Shi Yi copper thickness is 6 μ m～50 μ m, when the area of cathode pole piece be less than or equal to 1000mm * 500mm and more than or equal to 100mm * 50mm, discharge and recharge when requiring 1C～2C, get rid of other influencing factors, the optimum thickness of selecting Copper Foil for use is 8 μ m～20 μ m; Discharge and recharge and require 2C～3C or when bigger, get rid of other influencing factors, the optimum thickness of selecting Copper Foil for use be 15 μ m～35 μ m or more than.

No matter anodal aluminium foil or negative copper foil, thickness all should not be too thick.The thickness of metal forming (aluminium foil/Copper Foil) the both area with collector is relevant, more relevant with the capacitance of each monolithic pole piece, should be thick slightly than the thickness of the metal forming of the smaller capacitance of metal foil thickness of high capacitance.Metal forming should be thin as far as possible under the situation of condition permission, in the hope of the bigger pole piece area of acquisition when being coated with the active material of measuring together, thereby obtains better electrical property.

In order to reduce the weight and volume of metal forming, also in order to increase the pliability of metal forming, so that lithium-ion-power cell is manufactured the shape that can adapt to various different shape needs, no matter positive pole or the used metal forming of negative pole also can be selected mesh-like or dull and stereotyped netted metal forming separately for use.So-called dull and stereotyped netted metal forming is promptly got some fine and closely woven apertures with mechanical means or chemical method or additive method on thin aluminium foil or Copper Foil, stretching on direction in length and breadth forms.

The active material (not comprising conductive agent, binding agent, dispersant) of lithium ion battery previously accounts for 90% in the batching total amount, all the other about 10% are conductive agent, binding agent, dispersant.The amount of the active material of the lithium-ion-power cell that the present invention relates to is positive pole or negative pole all has bigger increase no matter, is about 93%～95% even higher.The density of positive active material is 0.02g～0.06g for every square centimeter, when the area of anode pole piece is less than or equal to 1000mm * 500mm and during more than or equal to 100mm * 50m, the optimum density of positive active material is 0.032g～0.042g for every square centimeter; The density of negative electrode active material is about 0.01g～0.03g for every square centimeter, when the area of cathode pole piece is less than or equal to 1000mm * 500mm and during more than or equal to 100mm * 50mm, the optimum density of negative electrode active material is 0.014g～0.021g for every square centimeter.

The key property of lithium-ion-power cell should be fit to the power purposes, just must adapt to the high-power requirement that discharges and recharges.Important composition among the present invention is that current collection (afflux) terminal that has adopted area bigger is the Da Ye lug, and the Da Ye lug is more conducive to water conservancy diversion, heat radiation, can adapt to the high-power requirement that discharges and recharges fully.For the consistency of title and embody the feature image of current collection among the present invention (afflux) terminal as far as possible, so current collection (afflux) terminal is called the Da Ye lug.Shown in Figure 1A-1, Figure 1B-1, on the visible positive pole 13 a Da Ye lug 11 is arranged, shown in Figure 1A, Figure 1B, also have only a Da Ye lug 10 on the negative pole 12, be called the Da Ye monopole ear; Shown in Fig. 1 C, Fig. 1 C-1, on the then visible positive/negative plate a plurality of Da Ye lugs are arranged, be called the multipole ear of Da Ye.Da Ye monopole ear, the multipole ear of Da Ye are referred to as the Da Ye lug.

The Da Ye lug should adopt bigger sectional area as far as possible under the situation of condition permission, that is to say that lug should be wide as far as possible, and is thick as far as possible, and current collection (afflux) path should be shortened as far as possible, helps the derivation and the heat radiation of electric current.Than the lithium-ion-power cell of low capacity, anodal, negative pole respectively has only a Da Ye lug usually; The lithium-ion-power cell of larger capacity then has several Da Ye lugs.Compared to the Da Ye monopole ear, the multipole ear of Da Ye is than water conservancy diversion, the heat radiation better of Da Ye monopole ear.

The Da Ye monopole ear also can be shown in Fig. 1 D, Fig. 1 D-1, and the Da Ye lug of both positive and negative polarity can each be drawn since the side of the different directions of pole piece.The Breadth Maximum of the Da Ye lug of drawing from the side of pole piece different directions can be isometric with that limit at Da Ye lug place, helps water conservancy diversion, the heat radiation of lithium-ion-power cell more.

If the Da Ye lug on the positive/negative plate is for example drawn from same direction or same side and upwards drawn, shown in Figure 1A, Figure 1A-1, the width of Da Ye monopole ear must not be greater than half (1/2nd) of the length of side on residing that limit of Da Ye lug.

Generally, the maximum height of Da Ye lug is not more than himself (Da Ye lug) width, preferably less than its width.The height of Da Ye lug is the smaller the better.

The lug of the electrokinetic cell of larger capacity; relatively than the lug of the electrokinetic cell of low capacity; from the performance of water conservancy diversion, heat radiation, high power charging-discharging, obviously want more roomy and just can meet the demands, so the Da Ye lug is positioned on the long limit of positive/negative plate usually or as far as possible.The Da Ye lug is positioned on the long limit of positive/negative plate, and aunt is called horizontal, if the Da Ye lug is positioned on the short limit of positive/negative plate, then can be described as vertical.From the afflux performance, horizontal is better than vertical, so under the situation of condition permission, should adopt horizontal as far as possible.

In fact, as long as guarantee not to be short-circuited, as required, the multipole ear of Da Ye can be arranged at arbitrarily on the long limit or any position on the minor face of positive and negative plate.

If the Da Ye monopole ear on the positive/negative plate is for example upwards drawn from same direction or same side, as Figure 1A, Figure 1A-1; Shown in Figure 1B, Figure 1B-1, the position of center line of Da Ye monopole ear should be positioned at about 1/4 place or 3/4 place on the length of side of laminated type positive and negative plate as far as possible.The inner edge line of Da Ye lug should be tried one's best near the center line on that limit at Da Ye lug place, but can not hinder the lug of another utmost point, must take insulation measures to prevent lug contact short circuit with another utmost point.

The positive/negative plate of laminated type lithium-ion-power cell is cut into rectangular sheet usually.The length-width ratio of rectangular sheet the best is the rectangular sheet of 6.2: 3.8 or 6: 4.The shape of positive/negative plate also can be made into circle or other shapes that needs except that rectangle.

The size of positive and negative plate is different because of its technological requirement, because the price of anodal active material is more than the active material costliness of negative pole, so when cutting, take all more bigger way of length and width of negative plate than positive plate, both saved resource, give full play to anodal material performance again.

Positive pole 13, negative pole 12 directly are cut into the rectangular sheets that have Da Ye monopole ear or the multipole ear of Da Ye usually.The manufacture method of Da Ye lug except that cutting, can also rolling cut or the mode of shearing punching press directly process the pole piece of moulding.

Generally, the width of the width of the Da Ye lug on the positive pole 13 and the Da Ye lug on the negative pole 12 is wide.Certainly, separately the width of Da Ye lug can be not wide under specific (special) requirements yet on the positive/negative plate.The lithium-ion-power cell of larger capacity is under the quick high-power situation about discharging and recharging of needs, and the lug width on the positive/negative plate should equate.Need not under the situation of high power discharge in the quick high-power charging of needs, the width of the Da Ye lug on the negative pole 12 can be greater than the Da Ye lug on anodal 13; Need not needing high power discharge under the situation of quick high-power charging, the width of the Da Ye lug on the positive pole 13 can be greater than the width of the Da Ye lug on the negative pole 12.

The Da Ye lug both can be that angle (being that the junction is right angle, the obtuse angle that does not have circular arc) is connected clearly with the junction of collector, also can make smooth circular arc and connect (being that the junction has the R angle), R as Figure 1A, Figure 1A-1 junction, not only have higher mechanical strength, help also preventing that heat from concentrating and cause fusing lug even meltdown pole piece.

Generally, the positive/negative plate of lithium-ion-power cell adopts corresponding lug, and promptly when anodal 13 employing Da Ye monopole ears, negative pole 12 also adopts the Da Ye monopole ear usually; Anodal 13 adopt the multipole ear of Da Ye, and negative pole 12 is also when adopting the multipole ear of Da Ye.For in response to the high-power needs that discharge and recharge, the lithium-ion-power cell of larger capacity is at needs fast under the high-power situation about discharging and recharging, and the lug form on the positive/negative plate should be quite, quantity should equate.Need not under the situation of high power discharge in the quick high-power charging of needs, negative pole can adopt the multipole ear of Da Ye, and positive pole then can adopt the Da Ye monopole ear; Need not needing high power discharge under the situation of quick high-power charging, positive pole can adopt the multipole ear of Da Ye, and negative pole then can adopt the Da Ye monopole ear.

No matter the manufacture method of lug is lug 10/11 or the lug through welding that directly cuts, and is and raises hair style, and visible lug is apparently higher than the part of pole piece coating active material, and its advantage is to be convenient to scrape powder.

Except that raising the hair style lug, then for hiding the hair style lug, this Tibetan hair style Da Ye lug 17/18 can more make full use of the space of lithium-ion-power cell inner chamber to the Da Ye lug shown in Fig. 1 D, Fig. 1 D-1.The form of hiding the hair style lug is by chance opposite with the form of raising the hair style lug.

Raise hair style, hiding hair style Da Ye lug can be on the long limit of the positive/negative plate of rectangle, also can be on the minor face of positive/negative plate, from the reasonability consideration, the Da Ye lug should be as far as possible on the long limit of positive/negative plate.

For the thin lug of high temperature fusing that prevents that lithium-ion-power cell from producing when high-power the discharging and recharging, the method that can weld shown in Figure 1B, Figure 1B-1 is made lug (15/16), can weld by the number of metal sheet during welding, both increase mechanical strength, improved guide performance, improved heat dispersion again.Therefore, make the Da Ye lug and preferably adopt welding Da Ye lug.Weld 14 must be firmly.The advantage of soldering polar ear is that the pole piece burr that cuts is less.Weld the material of used lug, aluminum just very, negative pole is nickel system or copper.

That the shape of Da Ye lug optionally can design, be processed as is square, rectangle, semicircle, trapezoidal or other help the shape of water conservancy diversion, heat radiation, best lug is shaped as the junction and has the trapezoidal of R fillet.

The basic role of barrier film is that positive and negative electrode is isolated, and prevents battery short circuit, and absorption also keeps electrolyte.Barrier film except that having good insulation performance performance, stable chemistry and chemical property, certain mechanical strength must be arranged, higher conductivity also must be arranged, so adopt porous TPO material the most suitable.In view of the high-power characteristics that discharge and recharge of lithium-ion-power cell palpus, require to have higher security performance.

The lithium-ion-power cell that the present invention relates to mainly adopts the polyethylene barrier film with 15～80 low μ m thickness of microcellular structure and failure of current temperature.The principle of selecting for use of barrier film is to get over Bao Yuehao, but when the area of negative or positive electrode pole piece be less than or equal to 1000mm * 500mm and more than or equal to 100mm * 50mm, discharge and recharge when requiring 1C～2C, get rid of other influencing factors, the optimum thickness of barrier film is 20 μ m～40 μ m; Discharge and recharge and require 3C or when bigger, get rid of other influencing factors, the optimum thickness of barrier film be 40 μ m or more than.When internal temperature of battery is higher than limit value (no matter whether because of short circuit cause), have the promptly molten voluntarily micropore that closes of barrier film of this characteristics, the passage of blocking-up lithium ion, battery no longer reacts.The barrier film that the barrier film that lithium-ion-power cell is selected for use also can adopt polypropylene material to make.

The barrier film of lithium-ion-power cell also can adopt positive plate surface (the also available method of immersing after the slurry of the TPO material of the pore creating material that directly will contain reasonable amount evenly is coated in roll extrusion, positive plate is immersed in the above-mentioned slurry), again positive plate is put into specific solvent extraction pore creating material and formed satisfactory barrier film with the positive plate one.

The shape of barrier film is consistent with the shape of positive/negative plate usually.Because the area of all positive poles 13 is all smaller than the area of negative pole 12, so wrap anodal 13 with barrier film.Barrier film is made pouch 19 or page shape 19-1 usually, so that positive pole 13 is packed into or clamp.Bag shape barrier film can seal three limits, also can only seal two adjacent limits; The barrier film that only seals adjacent two edges is easier to assembling.

No matter the area of barrier film is grown or is wide all greater than positive/negative plate, and except that lug, barrier film 19/19-1 must can not expose the edge, in case short circuit with encasing fully around the positive plate 13.

The material of lithium-ion-power cell pole except that certain intensity should be arranged, also must have good performance of heat dissipation for conduction, the good metal material of heat conductivility.Pole can also can adopt sheet for outside cylindrical, dispels the heat quickly with convenient lithium ion power.

In different needing under the situation, pole can be installed on any side surface of lithium-ion-power cell; In response to different needs, positive and negative terminals also can be installed on the different side surface of lithium-ion-power cell.

Generally, positive terminal of lithium-ion-power cell, a negative terminal can be satisfied the demand.For in response to the high-power needs that discharge and recharge, the pole of the lithium-ion-power cell of larger capacity can be installed more pole and satisfy, and two Positive Poles for example is installed simultaneously, two negative pole poles.When needs were installed several poles, the quantity of positive and negative terminals can equate, also can not wait.Under the quick high-power situation about discharging and recharging of needs, the quantity of positive and negative terminals should equate; Need not under the situation of high power discharge in the quick high-power charging of needs, the quantity of negative pole pole can equate with the quantity of Positive Poles or greater than the quantity of Positive Poles; Need not needing high power discharge under the situation of quick high-power charging, the quantity of Positive Poles can equate with the quantity of negative pole pole or greater than the quantity of negative pole pole.

The diameter that also can adjust pole satisfies above-mentioned needs, and for example under the quick high-power situation about discharging and recharging of needs, the diameter of positive and negative terminals should equate; Need not under the situation of high power discharge in the quick high-power charging of needs, the diameter of negative pole pole can be with the equal diameters of Positive Poles or greater than the diameter of Positive Poles; Need not needing high power discharge under the situation of quick high-power charging, the diameter of Positive Poles can be with the equal diameters of negative pole pole or greater than the diameter of negative pole pole.

Lithium-ion-power cell adopts polynary electrolyte, can adapt to wideer variations in temperature.Polynary electrolyte refers to two or more solvent bodies to be mixed with lithium hexafluoro phosphate.What lithium-ion-power cell adopted is:

(1), LIPF6 (lithium hexafluoro phosphate)/EC (vinyl carbonate): DMC (dimethyl carbonate): DEC (diethyl carbonate), solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05; Or

(2), LIPF6/EC: EMC (ethyl-methyl carbonic ester): DEC), solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05; Or

(3), LIPF6/EC: DMC: EMC, solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05; Or

(4), LIPF6/EC: DMC: EMC: DEC, solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05: 0.95～1.05.

The lithium-ion-power cell shell that the present invention relates to is the part of lithium-ion-power cell, is also referred to as electric core shell.In less battery, electric core shell also is the utmost point in the positive and negative electrode, and in the case, electric core shell is also referred to as electrode shell.Unless essential in the design, the electric core shell of high-power lithium ion electrokinetic cell should avoid becoming electrode shell as far as possible.Shell must insulate with pole.But under special circumstances, shell also can become electrode shell.

The square shell 9 of lithium-ion-power cell is made up of several planes.

The air-tightness of electric core of lithium ion power battery shell is had relatively high expectations, and higher intensity will be arranged, and is generally the metal-back of certain rigidity, for example the stainless steel electric core shell.The electric core shell of lithium-ion-power cell of the present invention both can be a metal-back, also can polytetrafluoroethylene or polypropylene or other suitable plastic make, bonding forming also can injection mo(u)lding, security performance more is better than the metal electric core shell.

The shell of lithium-ion-power cell also can adopt flexible package except adopting (for example stainless steel casing) the rigid package.

The shell top or the lateral layout of lithium-ion-power cell are processed with the port that patches of being convenient to series, parallel, and making things convenient for the battery serial or parallel connection is battery pack.

If the heat that lithium-ion-power cell produces down in working order can not in time distribute, safety, the cycle life of battery all there is harmful effect.Especially when numerous batteries were arranged in parallel, the heat of generation was bigger, and heat dissipation problem is more obvious, so can be processed with laterally or longitudinally or crisscross wind guide tank on square shell, helped dispelling the heat as early as possible.

For heat radiation as early as possible, fin (heat bridge) 9-1 can be designed, be processed with on the shell or its inside.

The cover plate of lithium-ion-power cell must coincide with electric core shell, and air-tightness is had relatively high expectations.The cover plate of lithium-ion-power cell also can polytetrafluoroethylene or polypropylene or other any anti-strong acid and the plastics manufacturing of certain intensity is arranged, injection mo(u)lding.

The safety valve 3 of lithium-ion-power cell is most important, be for prevent to overcharge, the set safety device of other contingencies such as short circuit, can shed the pressure that exceeds design in moment.The pressure relief vent of safety valve bottom also is the liquid injection port of lithium-ion-power cell.

Relating to safety valve of the present invention has two kinds, and one is with spring (compressed spring type) do to reset mechanism such as Fig. 5-1,5-2,5-3,5-4,5-5; Another is with anti-bow shell fragment (compressing tablet formula) do to reset mechanism such as Fig. 6-1,6-2,6-3,6-4,6-5,6-6.Division is as follows:

The structure of compressed spring type safety valve such as Fig. 5-1,5-2.Stage clip (spring) 25 is loaded in the endoporus of regulating bolt 23, the endoporus of regulating bolt is actually the retainer of stage clip, sealed steel ball 22, stage clip can be in regulating the endoporus of bolt vertically slippage and can not teeter up and down, sealed steel ball also can be in the endoporus of regulating bolt vertically slippage and can not teeter up and down.Be processed with the screw thread that matches with safety valve body 21 on the external diameter of adjusting bolt, be contained on the safety valve body so regulate bolt, can be by keyhole 27 regulated at will height, keyhole has the effect of exhaust concurrently.Regulate bolt when rotation and exert pressure and give stage clip, sealed steel ball is promptly fixed by stage clip.Regulate bolt and be processed with some vertical air discharge ducts 24, can turn the adjusting bolt by air discharge duct and make it rotation, then have steam vent 28 in the bottom of air discharge duct.Orlop is fluorine rubber ring 26 or other corrosion resistant cushion rubber pads, is pressed in or is attached on the liquid injection hole on the lithium ion battery cover board 1, and sealed steel ball then falls into and is pressed on fluorine rubber ring 26 or other the corrosion resistant cushion rubber pads.The pressure relief vent of safety valve bottom communicates with the liquid injection hole on the cover plate 1, so pressure relief vent is liquid injection hole when fluid injection.

Fluorine rubber ring or other corrosion resistant cushion rubber pads remove must certain elasticity, so that sealed steel ball is when compressing the corrosion resistant cushion rubber pad of fluorine rubber ring or other, fluorine rubber ring or other corrosion resistant cushion rubber pads produce certain distortion and the salable liquid injection hole of living.Stage clip is just withheld on sealed steel ball top with its bottom inner ring, and the bottom of sealed steel ball then falls on the fluorine rubber ring 26 or other corrosion resistant cushion rubber pads that is pressed on the battery cover board, and the constraint sealed steel ball can not slip off.When lithium-ion-power cell pressure inside during less than set point, sealed steel ball seals liquid injection port automatically because of the pressure of stage clip, keep inside battery and external environment condition to isolate, and when the pressure of inside battery during greater than set point, can back down the sealed steel ball release automatically, gas can be discharged from pressure relief vent 29 in moment, overflowed along air discharge duct 24 along steam vent 28.After interior pressure shed, the pressure of stage clip was enough to compress once more sealed steel ball, thereby pressure relief vent is sealed up.

The structure of compressing tablet formula safety valve such as Fig. 6-1,6-2.The anti-shell fragment 30 that bends of semilune (the anti-shell fragment that bends can be processed as plate shaped as required) is loaded on the bottom of regulating bolt 23, regulate bolt and be processed with the screw thread that matches with safety valve body 21, so regulating bolt is contained on the safety valve body, the bottom is pressed on the anti-bow shell fragment, can regulate the height of bolt by turning keyhole 8, adjust the tension force of anti-bow shell fragment.Be processed with a rectangular air discharge duct 31 in the safety valve body, the anti-shell fragment that bends is contained in the rectangular groove except that springing up and down, can not horizontally rotate.The bottom internal diameter of safety valve body is less, forms retainer, and sealed steel ball 22 is vertically slippage up and down in retainer.Be processed with technology pilot hole 33 on the anti-bow shell fragment, just in time withhold at the top of steel ball fixing seal steel ball.The bottom hole of sealed steel ball then falls on the fluorine rubber ring or other corrosion resistant cushion rubber pads that is pressed on the cover plate liquid injection port, has both fixed sealed steel ball, has also sealed up battery.

Fluorine rubber ring or other corrosion resistant cushion rubber pads remove must certain elasticity, so that sealed steel ball is when compressing the corrosion resistant cushion rubber pad of fluorine rubber ring or other, fluorine rubber ring or other corrosion resistant cushion rubber pads produce certain distortion and the salable liquid injection hole of living.Stage clip is just withheld on sealed steel ball top with its bottom inner ring, and the bottom of sealed steel ball then falls on the fluorine rubber ring 26 or other corrosion resistant cushion rubber pads that is pressed on the battery cover board, and the constraint sealed steel ball can not slip off.When lithium-ion-power cell pressure inside during less than set point, sealed steel ball seals liquid injection port automatically because of the pressure of stage clip, keep inside battery and external environment condition to isolate, and when the pressure of inside battery during greater than set point, can back down the sealed steel ball release automatically, gas moment can discharge from pressure relief vent 29, along air discharge duct 31 from steam vent 32 and keyhole 27 select.After interior pressure shed, the anti-pressure that bends shell fragment was enough to compress once more sealed steel ball, thereby pressure relief vent is sealed up.

Anti-bow shell fragment can design, be processed into plate shaped anti-bow shell fragment.The operation principle of plate shaped anti-bow shell fragment is just like the anti-shell fragment that bends of semilune.

The pressure of compressing tablet formula safety valve can also be by the tensioning state of the anti-bow of 34 fine settings of the screw shown in Fig. 6-2 shell fragment.

For exhaust more promptly, safety valve also can be designed as and be processed with some exhaust holes 35 separately on body.

Liquid injection hole on pressure relief vent 29 on the fluorine rubber ring 26 and the cover plate 1 is through hole mutually, and also the pressure relief vent with the safety valve bottom communicates, so do not mark separately.

Fluorine rubber ring 26 can replace by other any suitable cushion rubbers.

Anti-bow shell fragment can design, be processed into plate shaped or as the anti-shell fragment that bends of the semilune of Fig. 6-1.The operation principle of plate shaped anti-bow shell fragment is identical with the anti-shell fragment that bends of semilune.

No matter compressed spring type safety valve or compressing tablet formula safety valve, sealed steel ball 22 all can design, be processed as the spheroid 22-1 that has horizontal translot, and fluorine rubber ring 26-1 is then in the horizontal translot of banding on sealed steel ball 22-1.Stage clip or the anti-shell fragment that bends are when depressing sealed steel ball 22-1, and fluorine rubber ring 26-1 then seals up liquid injection hole.In order to prevent sealed steel ball 22-1 swing, also can process a fixing stalklet 35 thereon, stage clip or the anti-shell fragment that bends are enclosed within fixedly on the stalklet.When interior pressure during less than permissible value, stage clip or the anti-shell fragment that bends are then pushed down sealed steel ball 22-1, and fluorine rubber ring 26-1 closely seals liquid injection hole.When interior pressure greater than permissible value, during jack-up sealed steel ball 22-1, fluorine rubber ring 26-1 then upwards lifts simultaneously with it, sheds interior pressure rapidly.

Sealed steel ball 22 also can design, be processed as sealing frustum 22-2.Compare with steel ball 22 or 22-1, liquid injection hole is stretched in the bottom of sealing frustum, thereby it is more reliable to reset.Sealing also can be processed with fixedly stalklet 36 on the frustum, and stage clip or the anti-shell fragment that bends are enclosed within fixedly on the stalklet.When interior pressure during less than permissible value, stage clip or the anti-shell fragment that bends are then pushed down sealing frustum 22-2, closely seal liquid injection hole thereby fluorine rubber ring 26 produces deformation at the pressure of sealing frustum.When interior pressure greater than permissible value, during jack-up sealing frustum 22-2, shed interior pressure rapidly.The sealing frustum also can design, be processed as 22-3, and a horizontal translot is arranged on it, and fluorine rubber ring 26-1 is then in the horizontal translot of banding on sealing frustum 22-3.Stage clip or the anti-shell fragment that bends are depressed when sealing frustum 22-3, and fluorine rubber ring 26-1 then seals up liquid injection hole.When interior pressure greater than permissible value, during jack-up sealing frustum 22-3, fluorine rubber ring 26-1 then upwards lifts simultaneously with it, sheds interior pressure rapidly.

Fixedly stalklet 36 on sealed steel ball 22 or 22-1 or sealing frustum 22-2, the 22-3 also can be designed to cannulated sleeve, and stage clip is packed in the better cannulated sleeve of steering capability.

Generally, safety valve and pole should be installed on the same side surface of lithium-ion-power cell shell, only as required, also can be installed in different side surfaces.

In response to different needs, safety valve, pole can be installed on any side surface of lithium-ion-power cell.

For safety, the lithium-ion-power cell of larger capacity can be installed several safety valves at same side surface or different side surfaces.

Proportioning and compound method thereof

In the production technology of lithium ion battery, preparation (batching) operation and painting process be key very, and the electrical property of lithium-ion-power cell is had the greatest impact.

The preparation of slurry.The medium of preparation slurry has with NMP (N-N-methyl-2-2-pyrrolidone N-) and is medium or is medium with water; The method of preparation then has wet method and dry method.Specification of the present invention is distinguished according to medium, and the NMP medium then is described earlier, back explanation aqueous medium; Distinguish explanation wet method (wet method also has two: preparation method, mixed preparation method) in proper order earlier then, back explanation dry method (positive pole) according to compound method.Now division is as follows:

Anodal.With NMP is medium.Material requested: PVDF (polyvinylidene fluoride) 2.5%～3.5%, cobalt acid lithium 93%～95%, conductive agent graphite 1%～2% (or acetylene black 0.5%～1%), carbon black 2%～3%.The consumption of NMP is subjected to aforementioned substances particularly to be subjected to the restriction of cobalt acid lithium particle size, particle size distribution, is solid-to-liquid ratio=1 (active material solid content): 0.3～1 (NMP) so be about 30%～100% of all aforementioned substances total amounts; Generally, Zui Jia solid-to-liquid ratio=1: 0.35～0.7.PVDF, graphite (or acetylene black), carbon black all need to toast about 2～3 hours in about 120 ℃ of baking ovens.

Preparing method in proper order.PVDF is added the NMP stir about after 3～4 hours, added conductive agent graphite (or acetylene black), carbon black stir about 0.5～1 hour, add the pulpous state that cobalt acid lithium stir about became thickness in 2.5～4 hours at last.

The mixed preparation method.PVDF is added the NMP stir about 3～4 hours, add the pulpous state of conductive agent graphite (or acetylene black), carbon black, 2.5～4 hours one-tenth of cobalt acid lithium stir about thickness.

Anodal.With water is medium.The actual solid content 2%～4% of material requested: CMC (sodium carboxymethylcellulose) 0.6%～0.9%, SBR (styrene-butadiene latex emulsion), conductive agent graphite 1%～2% or acetylene black 0.5%～1%, carbon black 1.5%～3%, cobalt acid lithium 93%～95%.The consumption of water (deionized water, distilled water, pure water) be subjected to aforementioned substances particularly the particle diameter of cobalt acid lithium size, the distribution of granularity restricts, and is solid-to-liquid ratio=1: 0.4～1.3 so be about 40%～130% of all aforementioned substances total amounts; Generally, Zui Jia solid-to-liquid ratio=1: 0.6～1.SBR can use PTFE (polytetrafluoroethylene) to replace.

Preparing method in proper order.CMC is added in the entry stir about after 3～4 hours SBR added wherein stir about 0.5～1 hour, again conductive agent graphite (or acetylene black), carbon black were added stir about 0.5～1 hour, add cobalt acid lithium stir about at last and became the comparatively pulpous state of thickness in 2.5～4 hours, sieve removes aggregate and other impurity.

The mixed preparation method.At first CMC is added and stir 3～4 hours in the entry, then SBR was added wherein stir about 0.5～1 hour, again conductive agent graphite (or acetylene black), carbon black, cobalt acid lithium are added stir about and became the comparatively pulpous state of thickness in 2.5～4 hours, sieve removes aggregate and other impurity at last.

In view of lithium-ion-power cell need satisfy its high power charging-discharging characteristic, so anodal preparation must slightly strengthen conductive agent.

Negative pole.With NMP is medium.Material requested: it is solid-to-liquid ratio=1: 0.8～1.5 that graphite 93%～95%, PVDF5%～7%, NMP are about 80%～150% of all aforementioned substances total amounts; Best solid-to-liquid ratio=1: 1～1.3.PVDF needs to toast 2～3 hours in the about 120 ℃ baking oven of temperature, and graphite then needs 300 ℃～500 ℃ temperature bakings 4～8 hours.

Preparing method in proper order.PVDF is added the NMP stir about 3～4 hours, will add the pulpous state that stir about became thickness in 3～4 hours through the standby graphite of 325 eye mesh screen vibration screenings again.

Negative pole.With water is medium.Material requested: it is solid-to-liquid ratio=1: 0.8～1.6 that graphite 93%～95%, CMC0.9%～1.5%, SBR solid content 2%～4%, water (deionized water, distilled water, pure water) are about 80%～160% of all aforementioned substances total amounts; Generally, Zui Jia solid-to-liquid ratio=1: 1～1.3.CMC needs to toast 2～3 hours under 120 ℃ of temperature, and graphite then needs 300 ℃～500 ℃ temperature bakings 4～8 hours.SBR can replace with PTFE.

Preparing method in proper order.CMC is added in the entry stir about after 3～4 hours SBR added wherein stir about 0.5～1 hour, will toast the back at last and select standby graphite to add the pulpous state that stir about became thickness in 3～4 hours through 300 mesh sieves.

The dry method preparation.With NMP is the dry method preparation of the positive pole of medium.Material requested: material requested: PVDF2.5%～3.5%, cobalt acid lithium 93%～95%, conductive agent graphite 1.5%～2% (or acetylene black 0.8%～1.2%), carbon black 2%～3%.The consumption of NMP is subjected to the particularly restriction of cobalt acid lithium particle size, particle size distribution of aforementioned substances, so being about 30%～100% of all aforementioned substances total amounts is solid-to-liquid ratio=1 (solid content): 0.3～1 (NMP), generally, Zui Jia solid-to-liquid ratio=1: 0.35～0.7.PVDF, graphite (or acetylene black), carbon black all need to toast 2～3 hours in about 120 ℃ of baking ovens.

At first cobalt acid lithium, conductive agent graphite (or acetylene black), carbon black are put into batch mixer and stirred 3 hours; With PVDF and NMP stir about 2 hours, treat that it dissolves back (clean plasm) fully simultaneously, be about to mixed powder after batch mixer stirs and put into the pulpous state that became thickness through the PVDF that stirs and the clean plasm continuation stir about of NMP in 3 hours.

With water is the dry method preparation of the positive pole of medium.Material requested: CMC0.6%～0.9%, the actual solid content 2%～4% of SBR, conductive agent graphite 1%～2% or acetylene black 0.5%～1%, carbon black 1.5%～3%, cobalt acid lithium 93%～95%.The consumption of water (deionized water, distilled water, pure water) be subjected to aforementioned substances particularly the particle diameter of cobalt acid lithium size, the distribution of granularity restricts, and is solid-to-liquid ratio=1: 0.4～1.3 so be about 40%～130% of all aforementioned substances total amounts; Generally, Zui Jia solid-to-liquid ratio=1: 0.6～1.SBR can use PTFE (polytetrafluoroethylene) to replace.

At first cobalt acid lithium, conductive agent graphite (or acetylene black), carbon black were put into the batch mixer stir about 3 hours; With CMC and water stir about 3 hours, treating became clean plasm after it dissolves fully simultaneously, was about to the CMC that the mixed powder after batch mixer stirs puts into through stirring and continued the pulpous state that stir about became thickness in 3 hours with the clean plasm of water, sieved at last and removed aggregate and other impurity.

In the preparation of positive pole, select for use conductive agent to note, the particle diameter of conductive agent must be equal to or less than positive electrode (cobalt acid lithium, LiMn2O4, lithium nickel cobalt dioxide).

In order to guarantee to prepare the quality of slurry, in preparation slurry process, no matter be to be medium or to be medium with NMP with water (deionized water, distilled water, pure water), must be according to the meticulous calculating of consumption of particle diameter, particle size distribution and the conductive agent of positive electrode, the disposable medium that fills up can not add midway again; As for negative pole, also be so, no matter be to be medium or to be medium with NMP with water (deionized water, distilled water, pure water), must be according to the meticulous calculating of the consumption of negative material and additive, the disposable medium that fills up can not add midway again.Otherwise, be difficult to guarantee the quality of anode sizing agent or cathode size.

The active material that lithium ion power battery cathode is selected for use can also be selected LiMn2O4, lithium nickelate or lithium nickel cobalt dioxide for use except cobalt acid lithium, compound method and the aforesaid method of cobalt acid lithium preparation of selecting for use are basic identical.

The particle diameter of lithium ion power battery cathode material (cobalt acid lithium, LiMn2O4, lithium nickelate or lithium nickel cobalt dioxide) can be selected for use in 2 μ m～12 mu m ranges, but best particle diameter should be 5 μ m～8 μ m; The particle size distribution of positive electrode also must be narrow as far as possible, is example to select particle diameter 5 μ m materials for use, and the summation of powders meticulous (2 μ m are following) or thick excessively (more than the 12 μ m) is no more than 40% usually.

Following fine powder, the 12 μ m of positive electrode (cobalt acid lithium, LiMn2O4, lithium nickelate or lithium nickel cobalt dioxide) 2 μ m above than the compound method in the compound method of coarse dispersion and 2m～12 mu m ranges except that solid-to-liquid ratio is different, all the other are identical.The solid-to-liquid ratio of the fine powder that 2 μ m are following should then should reduce 10%～30% in the solid-to-liquid ratio than coarse dispersion that strengthens on the former solid-to-liquid ratio basis more than 20%～50%, the 12 μ m on former solid-to-liquid ratio basis.

Negative material graphite is through 300 order vibration screenings, online remainingly should not use usually.The conductive agent that relates among the present invention has comprised graphite, acetylene black, carbon black etc.;

The processing of above-mentioned substance need be done (300 ℃～500 ℃) the high-temperature process except that graphite during as negative material, and all the other make the material of baking processing, can be placed in the vacuum tank and vacuumize processing, need not to remake high-temperature process.

Manufacture method

The technological process of production of lithium-ion-power cell is: batching-→ coating-→ film-making-→ roll extrusion-→ reel and be assembled into interior body (comprise dress shell, seal)-→ fluid injection-→ change into-→ partial volume.

Each process is described respectively below.

Blending process is described in detail in the above, just repeats no more at this.

Coating (also claiming slurry).The anodal coating and the coating and the indistinction of negative pole, so not narration respectively: the positive pole that will stir (or negative pole) slurry evenly is coated on the metal forming collector, at the uniform velocity pulls out through the roller cutter and enters the baking oven baking, baking promptly becomes the semi-finished product flow collection sheet after doing.Must note in the coating that cut can not be arranged, reveal matrix, phenomenon such as partially gently lay particular stress on the direction in length and breadth.

In coating process, temperature controlling is extremely important: the temperature of preheating section can not be too high, and the temperature of selecting is 90 ℃ or following usually, and the temperature of middle warm area section is between 110 ℃～130 ℃, ± 10 ℃, the temperature of high temperature section between 120 ℃～140 ℃, ± 10 ℃.Under the aforementioned temperature condition, when baking coating, the temperature that the temperature of cathode size can more anodal slurry is high slightly about 10～15 ℃, is that the temperature of the slurry of medium can be that the temperature of slurry of medium is high slightly about 10～15 ℃ than NMP with water.

After prepared slurry was coated on the metal forming, no matter positive pole or negative pole must enter the coating machine oven dry tunnel of (also claiming tensile pulp machine) from the preheating section did not definitely turn-over.If the high temperature section that slurry (especially cathode size) at first enters coating machine is high-temperature baking suddenly, the very fast oven dry in surface very easily forms the dried shell of one deck, and a fold promptly forms the be full of cracks microgroove slightly.Slurry under the dried shell then is the malt sugar shape, and formed the invisible liquid film of one deck naked eyes between metal forming, the in fact just empty surface that is attached to metal forming of slurry, therefore very easily shedding, even flake (being that large stretch of active material comes off from metal forming), have a strong impact on the electrical property of lithium-ion-power cell.Existing coating process mostly is the single face coating greatly, and then the coating another side; But also can two-sided coating simultaneously.Being suitable for positive/negative plate of the present invention can be at the two sided coatings active material of metal forming, also can be only at the single face coating active material of metal forming, during assembling the pole piece back side (not being coated with the metal light face of active material) of homopolarity (negative pole and negative pole, anodal and positive pole) being pasted mutually to become the collector body that all there is active material on the two sides.In the case, the selected metal foil thickness of single face coating must will approach by more aforesaid metal foil thickness, is about 1/2～1/3 of aforementioned metal paper tinsel thickness.

Linear velocity control in the coating process is also very important.Under the said temperature condition, linear velocity can be adjusted in the scope of per minute 800mm～5000mm.Best linear velocity is per minute 1200mm～3500mm.

Coating is produced the pole piece of lithium-ion-power cell except that slurry mode that can be traditional, can also adopt the mode of high pressure painting.Under the certain pressure of the protective gas of drying, slurry evenly is sprayed on the metal forming from high speed nozzle, and not only adhesive force is better, and production capacity also obviously improves.

Film-making.Make (welding) lug,, then do not have the soldering polar ear of making operation if directly cut lug.Cutting pole piece can plate shearing machine, cutting machine or other equipment are finished.

Roll extrusion.The effect of roll extrusion in the lithium-ion-power cell production technology is very important.Linear pressure is excessive, not only causes the pole piece distortion, also may hinder the infiltration of electrolyte, and the embedding that influences lithium ion is deviate from, and finally certainly will influence the high-power charge-discharge performance of lithium-ion-power cell; Linear pressure is too small, then can influence the adhesive force of active material to metal forming, influences electrical property.Comparatively moderate linear pressure positive pole is about 100～180kg/CM, and negative pole is about 80～160kg/CM.

Generally, anodal thickness before roll extrusion is about 170 μ m～270 μ m, and the thickness after the roll extrusion is about 110 μ m～165 μ m; Thickness before the negative pole roll extrusion is about 185 μ m～275 μ m, 110 μ m after the roll extrusion～165 μ m.Optimum thickness before the anodal roll extrusion is 195 μ m～235 μ m, and the optimum thickness after the roll extrusion is 135 μ m～155 μ m; Optimum thickness before the negative pole roll extrusion is 220 μ m～250 μ m, and the optimum thickness after the roll extrusion is 135 μ m～155 μ m.

The assembling of battery.During assembling, should at first positive plate be put into the intermediate plate of bag shape barrier film 19 or page shape barrier film 19-1, the positive pole ear proper alignment must be parallel to an end of interior body 7 afterwards, and clamp with the current collection clamping plate, the other end of body was also clamped with the current collection clamping plate in the negative lug proper alignment was parallel to.Positive plate 13 and negative plate 12 be must walls stacked to be put and promptly stacks a negative plate and stack a positive plate again, and then stacks a negative plate, and the like.

Unless design necessaryly, consider that based on economy interior body outermost layer both sides are negative plate usually.In other words, under the situation of special requirement, interior body outermost layer both sides also can be positive plates.Positive Poles 4 is connected with positive plate 13, and negative pole pole 2 is connected with negative plate 12.The interior body that assembles must closely wrap up or clamp with polyethylene, polypropylene frame with barrier film.

Finish the interior body of confined state, get rid of the thickness of barrier film 19, the clearance distance of positive pole and negative pole must not be greater than 25 μ m (maximal clearance=membrane thicknesses+25 μ m of positive pole and negative pole).

Must be noted that Positive Poles 4 is connected with positive plate 13, negative pole pole 2 is connected with negative plate 12.

In order to clamp lug, no matter integral type current collection clamping plate or split type current collection clamping plate, the surface that the current collection clamping plate contact with lug all is processed with the quil of projection.Usually, the coverage rate of current collection clamping plate should be greater than the Da Ye lug.The method that clamps also is divided into perforation folder and both sides folder.Integral type current collection clamping plate tie up to the some wire casings that can be compressed and can flick of cutting on the bulk metal, lug are filled in the wire casing of current collection clamping plate A or D, with metal bolts 5 fastening getting final product.Split type current collection clamping plate B or C then are together in series by series connection bar 20 with some separate sheet metals, clamp lug and fastening with metal bolts 5 respectively.Integral type current collection clamping plate can be bored a hole and be pressed from both sides also and can press from both sides on both sides, and are same, and split type current collection clamping plate also can be bored a hole and be pressed from both sides or the both sides folder.From efficient and effect, the efficient of perforation folder and effect are all more much better than the mode of both sides folder.

For the bolt looseness that prevents that lug is connected with pole, so need to solidify glue with bolt.

Fluid injection.Must extract the normality air in the lithium-ion-power cell inner chamber before the fluid injection out, eliminate the moisture in the inner chamber, the battery inner chamber must be negative pressure state, then an amount of electrolyte is injected from relief valve port.The reservoir quantity fibrous root of lithium-ion-power cell is according to its calculation of capacity, the excessive not only leakage easily of reservoir quantity, and easily cause bulging shell; The too small deterioration that then easily causes the positive and negative electrode active material of reservoir quantity.The reservoir quantity of lithium-ion-power cell is adjusted in the scope of 0.15Ah/g～0.6Ah/g usually; Best reservoir quantity is between 0.2Ah/g～0.35Ah/g.The control of the environment of fluid injection is extremely important, thus must be in control box or other can meet the requirements of and finish fluid injection in the environment.Because of the pressure relief vent of safety valve communicates with liquid injection hole on the cover plate, so fluid injection is injected from the pressure relief vent of safety valve usually; Also can on shell or cover plate, process liquid injection hole separately.

Lithium-ion-power cell after body and the fluid injection, must keep certain cavity in packing into, cannot or save sheathing material for reduced volume, painstakingly be full of the inner chamber of lithium-ion-power cell with solid matter or electrolyte.Look the amount of capacity difference of lithium-ion-power cell, cavity is about 1%～10% of inner chamber total measurement (volume), and cavity can the protective gas filling.

Change into.Changing into is the final key of battery production.The principle that changes into of the moving battery of high-power lithium ion must be little electric current, low-voltage, electric current greatly anything but, and high voltage changes into, fully the active material on the positive and negative afflux matrix of activation.Formation process must disposablely be finished incessantly, can not arbitrarily end or stop midway.Changing into curve should smooth connection, electric current should be controlled at 0.01C/10 hour-→ 0.02C/5 hour-→ 0.05C/5 hour-→ 0.1C/4 hour-→ 0.2C/1 hour, transfer constant voltage after constant current is full of to and continue to fill, must disposable abundance.

Partial volume.The every index of electrical property is all met the battery of technological requirement and battery that every electrical performance indexes does not reach technological requirement is put warehouse-in respectively.

Claims

1. rechargeable lithium-ion-power cell, each cell is made up of cover plate (1), negative pole pole (2), safety valve (3), Positive Poles (4), electrolyte (8), shell (9), Positive Poles (4) is connected with anodal (13), and negative pole pole (2) then is connected with negative pole (12); Anodal (13) select certain thickness aluminium foil for use, and the two sides evenly is coated with positive active material, and negative pole (12) is selected certain thickness Copper Foil for use, and the two sides evenly is coated with negative electrode active material; It is characterized in that: interior body (7) be by one or more pairs of positive/negative plate groups promptly anodal (13), negative pole (12) and barrier film (19,19-1) common constitute have multiple lamination structure, the positive/negative plate sequence interval is put neat electrode aggregate; The pole piece form of negative or positive electrode is the rectangular sheet that has Da Ye monopole ear or the multipole ear of Da Ye, and passes through current collection clamping plate (6) derived current to pole; Positive pole has one or several poles, and negative pole has one or several poles, and the quantity of positive and negative terminals can equate also can not wait, the diameter of pole can equate also can not wait; The shape of pole is installed on same or different any surface of shell (9) except that can also adopting sheet for cylindrical; The shape of positive/negative plate also can be made into other shapes except that rectangle; Positive plate (13) and negative plate (12) must wall is stacked be put; Interior body (7) outermost layer both sides both can be negative plate, also can be positive plates; Interior body (7) must closely wrap up or clamp with polyethylene, polypropylene frame with barrier film; Positive pole ear (11) proper alignment is parallel to an end of interior body (7), the other end of body in negative lug (10) proper alignment is parallel to; Anodal (13) or negative pole (12) can be selected the net metal paper tinsel separately for use; The active material of anodal (13) both can be a cobalt acid lithium, also can be LiMn2O4, lithium nickelate or lithium nickel cobalt dioxide; The active material of negative pole (12) both can be a native graphite, also can be crystalline flake graphite, Delanium or petroleum coke.

2. rechargeable lithium-ion-power cell according to claim 1 is characterized in that: the density of anodal (13) active material is 0.02g～0.06g for every square centimeter, is preferably 0.032g～0.042g; The density of negative pole (12) active material is about 0.01g～0.03g for every square centimeter, is preferably 0.014g～0.021g.

3. rechargeable lithium-ion-power cell according to claim 1, it is characterized in that: if the Da Ye lug on the positive/negative plate is drawn from same direction or same side, the Breadth Maximum of Da Ye monopole ear must not be greater than half of the length of side on that limit at Da Ye lug place; If the Da Ye lug on the positive/negative plate is drawn from same direction or same side, the position of center line of Da Ye monopole ear should be positioned at about 1/4 place or 3/4 place on the length of side of laminated type pole piece; The Da Ye lug of both positive and negative polarity also can each be drawn since the side of the different directions of pole piece, and from the Da Ye lug that the side of pole piece different directions is drawn, its Breadth Maximum can be isometric with that limit at Da Ye lug place.

4. rechargeable lithium-ion-power cell according to claim 1 is characterized in that: generally, the maximum height of Da Ye lug is not more than himself width, preferably less than its width.

5. rechargeable lithium-ion-power cell according to claim 1, it is characterized in that: the shape of Da Ye lug can for square, rectangle, semicircle, trapezoidal or other help the shape of water conservancy diversion, heat radiation, optimum shape is have the R angle trapezoidal; The lug root both can connect for smooth circular arc for clear angle is connected also with the junction of pole piece; The Da Ye lug can be made separately and be welded on pole piece after the pole piece roll extrusion except that can directly cutting, and preferably adopts welding Da Ye lug; The Da Ye lug both can also can be the Tibetan hair style for raising hair style; The Da Ye lug both can be on the long limit of positive/negative plate, also can be on the minor face of positive/negative plate.

6. rechargeable lithium-ion-power cell according to claim 1 is characterized in that: some wire casings that can be compressed and can flick are arranged on the integral type current collection clamping plate; Split type current collection clamping plate are by series connection bar (20) series connection with some separate sheet metals; No matter integral type current collection clamping plate or split type current collection clamping plate, the current collection clamping plate should cover lug, its with surface that lug contacts on be processed with the quil of projection.

7. rechargeable lithium-ion-power cell according to claim 1 is characterized in that: barrier film adopts polyethylene or polypropylene material system pouch (19) or the page shape (19-1) with the low 15 μ m～80 μ m thickness of microcellular structure and failure of current temperature; Bag shape barrier film (19) can also can only seal adjacent both sides from three heat-sealings; No matter the area of barrier film (19) is grown or is wide all greater than positive/negative plate, and except that lug, barrier film (19) must cover positive plate (13) or negative plate (12) all around fully, can not expose the edge, in case short circuit; When discharging and recharging when requiring 1C～2C, the optimum thickness of barrier film (19) is 20 μ m～40 μ m; Discharge and recharge and require 3C or when bigger, the optimum thickness of barrier film be 40 μ m or more than.

8. safety valve that is used for rechargeable lithium-ion-power cell, it is characterized in that: stage clip wherein (25) is loaded in the endoporus of regulating bolt (23), the endoporus of regulating bolt is used to keep the stable of stage clip, sealed steel ball (22), stage clip (25) can vertically slippage up and down in regulating the endoporus of bolt, sealed steel ball (22) can vertically slippage up and down in regulating the endoporus of bolt, regulates on the external diameter of bolt and is processed with the screw thread that matches with safety valve body (21); Regulate bolt and be processed with some vertical air discharge ducts (24), then have steam vent (28) in the bottom of air discharge duct; Stage clip (25) is pressed in the top of steel ball, and the bottom hole of sealed steel ball (22) then falls on the fluorine rubber ring (26) that is pressed on the cover plate liquid injection port; The pressure relief vent of safety valve bottom communicates with the liquid injection hole on the cover plate (1); Stage clip (25) also can instead bend shell fragment (30) and replace, and the anti-shell fragment (30) that bends is loaded on the bottom of regulating bolt (23), regulates bolt and is processed with the screw thread that matches with safety valve body (21), adjusts the tension force of anti-bow shell fragment by turning keyhole (27); Be processed with a rectangular air discharge duct (31) in the safety valve body, counter bend shell fragment (30) can be in air discharge duct springing and can not horizontally rotating up and down; Sealed steel ball (22) is vertically slippage up and down in the retainer of safety valve body, be processed with technology pilot hole (33) on the anti-bow shell fragment (30), withhold the top at steel ball, the bottom hole of sealed steel ball (22) then falls on the fluorine rubber ring (26) that is pressed on the cover plate liquid injection port; The pressure relief vent of safety valve bottom communicates with the liquid injection hole on the cover plate (1); Can be processed with exhaust hole (35) separately on the safety valve body (21); Sealed steel ball then can be processed as the spheroid (22-1) that has horizontal translot, in the horizontal translot of fluorine rubber ring (26-1) banding on sealed steel ball (22-1); Sealed steel ball (22) can be processed as sealing frustum (22-2); Sealing frustum (22-3) can be processed a horizontal translot, and fluorine rubber ring (26-2) is then in the horizontal translot of banding in sealing frustum (22-3); Safety valve can be installed on any surface of shell (9); The lithium-ion-power cell of larger capacity can be installed several safety valves at same side surface or different side surfaces; Generally, safety valve (3) both can be installed on the same surface of shell (9) with pole, also can be installed on the different surfaces.

9. the manufacture method of a rechargeable lithium-ion-power cell is characterized in that, may further comprise the steps:

(1) batching comprises following the whole bag of tricks:

A, be the anode sizing agent of medium with the preparation of preparation method in proper order with NMP, material requested is: PVDF (polyvinylidene fluoride) 2.5%～3.5%, cobalt acid lithium 93%～95%, conductive agent graphite 1%～2% or acetylene black 0.5%～1%, carbon black 2%～3%; The consumption of NMP is subjected to the restriction of cobalt acid lithium particle size, particle size distribution, solid-to-liquid ratio generally=1 (solid content): 0.3～1 (NMP); Best solid-to-liquid ratio=1: 0.35～0.7; PVDF, graphite (or acetylene black), carbon black all need to toast about 2～3 hours in about 120 ℃ of baking ovens; PVDF is added the NMP stir about after 3～4 hours, added conductive agent graphite (or acetylene black), carbon black stir about 0.5～1 hour, add the pulpous state that cobalt acid lithium stir about became thickness in 2.5～4 hours at last;

A-2, be the anode sizing agent of medium with the preparation of preparation method in proper order with water, material requested is: CMC0.6%～0.9%, the actual solid content 2%～4% of SBR, conductive agent graphite 1%～2% or acetylene black 0.5%～1%, carbon black 1.5%～3%, the sour lithium 93%～95% of cobalt; The consumption of water (deionized water, distilled water, pure water) is solid-to-liquid ratio=1: 0.4～1.3 for 40%～130% of all aforementioned substances total amounts; Generally, Zui Jia solid-to-liquid ratio=1: 0.6～1; SBR can replace with PTFE; CMC is added in the entry stir about after 3～4 hours SBR added wherein stir about 0.5～1 hour, again conductive agent graphite (or acetylene black), carbon black were added stir about 0.5～1 hour, add cobalt acid lithium stir about at last and became the comparatively pulpous state of thickness in 2.5～4 hours, sieve removes aggregate and other impurity;

A-3, be the anode sizing agent of medium with NMP with dry method preparation, material requested is: PVDF2.5%～3.5%, cobalt acid lithium 93%～95%, conductive agent graphite 1.5%～2% (or acetylene black 0.8%～1.2%), carbon black 2%～3%, the consumption of NMP is subjected to the restriction of cobalt acid lithium particle size, particle size distribution, for 35%～90% of all aforementioned substances total amounts are solid-to-liquid ratio=1 (solid content): 0.3～1, best solid-to-liquid ratio=1: 0.35～0.7; PVDF, graphite (or acetylene black), carbon black all need to toast 2～3 hours in about 120 ℃ of baking ovens; Cobalt acid lithium, conductive agent graphite (or acetylene black), carbon black are put into batch mixer and stirred 3 hours; With PVDF and NMP stir about 2 hours, treat that it dissolves back (clean plasm) fully simultaneously, be about to mixed powder after batch mixer stirs and put into the pulpous state that became thickness through the PVDF that stirs and the clean plasm continuation stir about of NMP in 3 hours;

A-4, be the anode sizing agent of medium with dry method preparation with water, material requested is: CMC0.6%～0.9%, the actual solid content 2%～4% of SBR, conductive agent graphite 1%～2% or acetylene black 0.5%～1%, carbon black 1.5%～3%, the sour lithium 93%～95% of cobalt; The consumption of water (deionized water, distilled water, pure water) is solid-to-liquid ratio=1: 0.4～1.3 for 40%～130% of all aforementioned substances total amounts; Generally, Zui Jia solid-to-liquid ratio=1: 0.6～0.1; Cobalt acid lithium, conductive agent graphite (or acetylene black), carbon black were put into the batch mixer stir about 3 hours; With CMC and water stir about 3 hours, treating became clean plasm after it dissolves fully simultaneously, was about to the CMC that the mixed powder after batch mixer stirs puts into through stirring and continued the pulpous state that stir about became thickness in 3 hours with the clean plasm of water, sieved at last and removed aggregate and other impurity;

B, preparation are the cathode size of medium with NMP, and material requested is: graphite 93%～95%, PVDF5%～7%, NMP are solid-to-liquid ratio=1: 0.8～1.5 for 80%～150% of all aforementioned substances total amounts; Best solid-to-liquid ratio=1: 1～1.3; PVDF, need toast 2～3 hours in the about 120 ℃ baking oven of temperature, and graphite then needs 300 ℃～500 ℃ temperature bakings 4～8 hours; Negative material is through 325 order vibration screenings, online remainingly should not use usually; PVDF is added the NMP stir about 3～4 hours, will add the pulpous state that stir about became thickness in 3～4 hours through the standby graphite of 325 eye mesh screen vibration screenings again;

B-1, preparation are the cathode size of medium with water, and material requested is: graphite 93%～95%, CMC0.8%～1.5%, SBR solid content 2%～4%, water (deionized water, distilled water, pure water) are solid-to-liquid ratio=1: 0.8～1.6 for 80%～160% of all aforementioned substances total amounts; Best solid-to-liquid ratio=1: 1～1.3; CMC needs to toast 2～3 hours under 120 ℃ of temperature, and graphite then needs 300 ℃～500 ℃ temperature bakings 4～8 hours; SBR can replace with PTFE; Negative material is through 300 order vibration screenings, online remainingly should not use usually; CMC is added in the entry stir about after 3～4 hours SBR (or PTFE) added wherein stir about 0.5～1 hour, will toast the back at last and select standby graphite to add the pulpous state that stir about became thickness in 3～4 hours through 325 mesh sieves;

The particle diameter of positive electrode can be selected for use in 2 μ m～12 mu m ranges, and best particle diameter should be 5 μ m～8 μ m; The summation of the powder that the particle size distribution of utmost point material is meticulous or thick excessively is no more than 40% usually; The solid-to-liquid ratio of the fine powder that 2 μ m are following should then should reduce 10%～30% in the solid-to-liquid ratio than coarse dispersion that strengthens on the former solid-to-liquid ratio basis more than 20%～50%, the 12 μ m on former solid-to-liquid ratio basis; In the preparation of positive pole, the particle diameter of the conductive agent material of selecting for use must be equal to or less than the particle diameter of positive electrode;

(2) coating: the negative or positive electrode slurry that stirs evenly is coated on the metal forming collector, at the uniform velocity pulls out through the roller cutter and enter the baking oven baking, baking promptly becomes the semi-finished product flow collection sheet after doing; Must note in the coating that cut can not be arranged, reveal matrix, phenomenon such as partially gently lay particular stress on the direction in length and breadth; No matter positive pole or negative pole must enter the oven dry tunnel of coating machine from the preheating section after prepared slurry is coated on the metal forming, definitely do not turn-over; The temperature of preheating section is generally 90 ℃ or following, the temperature of middle warm area section between 110 ℃～130 ℃, ± 10 ℃, the temperature of high temperature section between 120 ℃～140 ℃, ± 10 ℃; Under the aforementioned temperature condition, when baking coating, the temperature that the temperature of cathode size can more anodal slurry is high slightly 10 ℃～15 ℃, with water be medium slurry temperature can than NMP be the slurry temperature of medium high slightly 10 ℃～15 ℃; The linear velocity of coating can be adjusted in the scope of per minute 800mm～5000mm; Best linear velocity is per minute 1200mm～3500mm; The density of the active material of the positive pole after the coating (13) is 0.02g～0.06g for every square centimeter, and optimum density then is 0.032g～0.042g for every square centimeter; The density of the active material of coating back negative pole (12) is about 0.01g～0.03g for every square centimeter, and optimum density is 0.014g～0.021g for every square centimeter; Both can be coated with by single face, can two-sidedly be coated with simultaneously; Single face coating active material, the pole piece back side of homopolarity must be pasted mutually during assembling becomes the collector body that all there is active material on the two sides; The selected metal foil thickness of single face coating must will approach by more aforesaid metal foil thickness;

(3) film-making: anodal (13) are cut into the rectangular sheet that has Da Ye monopole ear or the multipole ear of Da Ye and scrape off the slurry that lug (11) is located; Negative pole (12) is cut into the rectangular sheet that has Da Ye monopole ear or the multipole ear of Da Ye and scrapes off the slurry that lug (10) is located; The length-width ratio of positive/negative plate the best is 6.2: 3.8 or 6: 4; The shape of positive/negative plate also can be made into circle or other shapes that needs except that rectangle; The method of making lug except that cutting, can rolling cut or the mode of shearing punching press directly process the pole piece of moulding; The Da Ye lug can also be made and be welded on the positive/negative plate after the positive/negative plate roll extrusion separately; The Breadth Maximum of Da Ye lug is less than that length of side at lug place half (1/2), and from the pole piece two ends or the different directions Da Ye lug of drawing, its Breadth Maximum can be isometric with that limit at lug place; The maximum height of Da Ye lug is not more than himself width, preferably less than its width; Minimum widith should be less than its height; During special requirement, the minimum widith of Da Ye lug can be less than its height; If the lug on the positive/negative plate is drawn from same direction, the position of center line of Da Ye monopole ear should be positioned at about 1/4 place or 3/4 place on the length of side of laminated type pole piece; The inner edge line of Da Ye monopole ear should be near the center line of pole piece; The Da Ye lug both can also can be the Tibetan hair style for raising hair style; Raising hair style or hide hair style Da Ye lug both can be on the long limit of rectangular sheet, also can be on the minor face of rectangular sheet; Under the situation of condition permission, should adopt horizontal as far as possible; Generally, the width of the Da Ye lug on the positive/negative plate is wide; But under specific (special) requirements, the width of Da Ye lug can be not wide yet on the positive/negative plate; Need not under the situation of high power discharge in the quick high-power charging of needs, the width of the Da Ye lug of negative pole can be greater than the width of the Da Ye lug of positive pole; Need not needing high power discharge under the situation of quick high-power charging, the width of anodal Da Ye lug can be greater than the width of the Da Ye lug of negative pole; The anodal Da Ye monopole ear that adopts, negative pole also adopts the Da Ye monopole ear; The anodal multipole ear of Da Ye that adopts, negative pole are also when adopting the multipole ear of Da Ye; Need not under the situation of high power discharge in the quick high-power charging of needs, negative pole can adopt the multipole ear of Da Ye, and positive pole then can adopt the Da Ye monopole ear; Need not needing high power discharge under the situation of quick high-power charging, positive pole can adopt the multipole ear of Da Ye, and negative pole then can adopt the Da Ye monopole ear; The shape of Da Ye lug can for square, rectangle, semicircle, trapezoidal or other help the shape of water conservancy diversion, heat radiation, best lug is shaped as the trapezoidal lug that has the R fillet; The root of Da Ye lug can be connected for clear angle with the junction of pole piece, also can connect for smooth circular arc; The Da Ye lug can be processed as raises hair style (10/11), also can be for hiding hair style (17/18);

(4) roll extrusion: in the rolling technology, anodal linear pressure is 100～180kg/CM, and the linear pressure of negative pole is 80～160kg/CM; Anodal (13) thickness before roll extrusion is about 170 μ m～270 μ m, and the thickness after the roll extrusion is about 110 μ m～165 μ m, and the optimum thickness before the anodal roll extrusion is 195 μ m～235 μ m, and the optimum thickness after the roll extrusion is 135 μ m～155 μ m; Thickness before negative pole (12) roll extrusion is about 185 μ m～275 μ m, 110 μ m after the roll extrusion～165 μ m, and the optimum thickness before the negative pole roll extrusion is 220 μ m～250 μ m, the optimum thickness after the roll extrusion is 135 μ m～155 μ m;

(5) assembling: only assemble a positive terminal, a negative terminal on the shell (9) usually; The lithium-ion-power cell of larger capacity then can be installed several poles, and the quantity of positive and negative terminals can equate, also can not wait; Under the quick high-power situation about discharging and recharging of needs, the quantity of positive and negative terminals should equate; Need not under the situation of high power discharge in the quick high-power charging of needs, the quantity of negative pole pole can equate with the quantity of Positive Poles or greater than the quantity of Positive Poles; Need not needing high power discharge under the situation of quick high-power charging, the quantity of Positive Poles can equate with the quantity of negative pole pole or greater than the quantity of negative pole pole; The diameter that also can adjust pole satisfies above-mentioned needs, and under the quick high-power situation about discharging and recharging of needs, the diameter of positive and negative terminals should equate; Need not under the situation of high power discharge in the quick high-power charging of needs, the diameter of negative pole pole can be with the equal diameters of Positive Poles or greater than the diameter of Positive Poles; Need not needing high power discharge under the situation of quick high-power charging, the diameter of Positive Poles can be with the equal diameters of negative pole pole or greater than the diameter of negative pole pole;

Barrier film (19) adopts polythene material with the low 15 μ m～80 μ m thickness of microcellular structure and failure of current temperature or bag shape (19) or the page shape (19-1) that polypropylene material is made, so that positive pole (13) is packed into or clamp, bag shape barrier film (19) can be from three heat-sealings, also can only seal adjacent both sides, so that positive plate 13 is packed into or clamp. Discharge and recharge when requiring 1C～2C, the optimum thickness of barrier film (19 or 19-1) is 20 μ m～40 μ m; Discharge and recharge and require 3C or when bigger, the optimum thickness of barrier film be 40 μ m or more than; Except that lug, barrier film (19) must cover anodal (13) or negative pole (12) all around fully, can not expose the edge, in case short circuit; Available immersing in the slurry of TPO material that the positive pole (13) of method after with roll extrusion be immersed in the pore creating material that contains reasonable amount put into specific solvent extraction pore creating material with anodal (13) again and formed barrier film with the positive plate one; Also the slurry of TPO material that contains the pore creating material of reasonable amount directly can be coated in the surface of the positive pole (13) after the roll extrusion, more anodal (13) be put into specific solvent extraction pore creating material and form barrier film (19) with the positive plate one;

During assembling, should at first positive plate be put into the intermediate plate of bag shape barrier film (19) or page shape barrier film (19-1), positive plate (13) and negative plate (12) be must wall stacked to be put and promptly stacks a negative plate and stack a positive plate again, and then stacks a negative plate, and the like; The positive pole ear proper alignment must be parallel to an end of interior body 7 afterwards, and clamp with the current collection clamping plate, the other end of body was also clamped with the current collection clamping plate in the negative lug proper alignment was parallel to; Interior body (7) must closely wrap up or clamp with polyethylene, polypropylene frame with barrier film; The interior body (7) that assembles is got rid of barrier film (19) thickness, and the clearance distance of anodal (13) and negative pole (12) must not be greater than 25 μ m;

(6) fluid injection: must extract the normality air in the lithium-ion-power cell inner chamber before the fluid injection out, then an amount of electrolyte be injected from the liquid injection hole in the safety valve (3); Reservoir quantity is adjusted in the scope of 0.15Ah/g～0.6Ah/g usually; Best reservoir quantity is at 0.2Ah/g～0.35Ah/g; Employing can adapt to the polynary electrolyte of wideer variations in temperature: LIPF6/EC: DMC: DEC, and solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05; Or LIPF6/EC: EMC: DEC, solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05; Or LIPF6/EC: DMC: EMC, solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05; Or LIPF6/EC: DMC: EMC: DEC, solvent ratios is 0.95～1.05: 0.95～1.05: 0.95～1.05: 0.95～1.05;

(7) change into: changing into principle must be little electric current, low-voltage, electric current greatly anything but, high voltage changes into, could fully activate the active material on the positive and negative afflux matrix, formation process must disposablely be finished incessantly, can not arbitrarily end or stop midway, change into curve and answer smooth connection, electric current should be controlled at 0.01C/10 hour-→ 0.02C/5 hour-→ 0.05C/5 hour-→ 0.1C/4 hour-→ 0.2C/1 hour, transfer constant voltage after constant current is full of to and continue to fill, must disposable abundance;

(8) partial volume: the every index of electrical property is all met the battery of technological requirement and battery that every electrical performance indexes does not reach technological requirement is put warehouse-in respectively.