CN109786854A - A kind of fast charge lithium ion battery and preparation method thereof - Google Patents
A kind of fast charge lithium ion battery and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of fast charge lithium ion batteries and preparation method thereof.This fast charge lithium ion battery is made by preparation method below: 1) preparing positive/negative conductive material respectively；2) conductive slurries are prepared；3) conductive slurries are mixed with conductive material, is coated on substrate, obtains positive/negative pole piece；The coating edge of pole piece blanks in advance；4) cutting the pre- of pole piece blanks, and forms electrode connecting piece；5) square electric cell, extraction electrode connection sheet are rolled into；6) connection sheet and metal compound sheet are welded；7) connection sheet is cut；8) by connection sheet bending forming；9) exposed connection sheet rubberizing is protected；10) battery core semi-finished product are subjected to top side edge sealing；11) battery core is toasted, is then injected into electrolyte, partial volume obtains fast charge lithium ion battery.The invention discloses it is a kind of can ultrafast charging lithium ion battery, can will shorten in the charging time within 15 minutes, 6 minutes are i.e. chargeable up to 90% or more of battery total electricity.
Description
Technical field
The present invention relates to a kind of lithium ion battery, in particular to a kind of fast charge lithium ion battery and preparation method thereof.
Background technique
Lithium ion battery is a kind of secondary cell, it relies primarily on lithium ion, and movement carrys out work between a positive electrode and a negative electrode.
In charge and discharge process, Li+Insertion and deintercalation back and forth between two electrodes: when charging, Li+ is from positive deintercalation, by electrolysis
Matter is embedded in cathode, and cathode is in lithium-rich state；It is then opposite when electric discharge.
The advantages of conventional lithium ion battery is energy density height, but in order to improve course continuation mileage, the electricity of electrical appliance design
Tankage will face charging time long problem when relatively high.Charging is the important step that battery is reused, lithium-ion electric
The charging process in pond is divided into two stages: constant current fast charge stage and constant-voltage power supply depletion stage.Constant current fast charge stage, cell voltage
It is stepped up to the normal voltage of battery, is then transferred to constant-voltage phase in the case where controlling chip, voltage is no longer increased so that ensure will not
It overcharges, electric current is then gradually attenuated to the value of setting with the rising of battery capacity, and is finally completed charging.
In general, the lithium ion battery charging time of high capacity, even higher, user experience was good up to 2~5 hours at present
Sensitivity decline.Thus, how to prepare a kind of lithium ion battery that fast charge may be implemented becomes the heat of worker's concern in row
Point problem.
Summary of the invention
It is of the existing technology in order to overcome the problems, such as, the purpose of the present invention is to provide a kind of fast charge lithium ion battery and its
Preparation method.
The technical solution used in the present invention is:
A kind of preparation method of fast charge lithium ion battery, comprising the following steps:
1) positive active material and negative electrode active material are subjected to carbon coating processing respectively, obtain positive conductive material and born
Pole conductive material；
2) graphene, superconductive carbon black, carbon nanotube, dispersing agent and solvent are mixed, obtains conductive slurries；
3) conductive slurries are mixed with positive conductive material, resulting positive electrode coating is coated on positive-pole base material, is obtained just
Pole piece；Conductive slurries are mixed with negative conductive material, resulting cathode coating is coated on base material of cathode, obtains negative electrode tab；
Positive plate and the coating edge of negative electrode tab blank in advance respectively；
4) positive plate is respectively cut and the pre- of negative electrode tab blanks, forms electrode connecting piece；
5) by positive plate, negative electrode tab and the membrane coil squarely battery core after cutting, electrode connecting piece is respectively perpendicular to electricity
Pole length direction laminated type is drawn；
6) connection sheet that positive electrode and negative electrode are drawn is welded with the metal compound sheet with sealant respectively；
7) connection sheet extra after welding is cut；
8) by connection sheet with the direction bending forming perpendicular to battery core cross section；
9) the connection sheet rubberizing exposed to battery core protection, obtains battery core semi-finished product；
10) battery core semi-finished product are subjected to top side edge sealing, and reserved fluid injection side；
11) battery core after edge sealing is toasted, is then injected into electrolyte, partial volume obtains fast charge lithium ion battery.
Preferably, in the preparation method step 1) of this fast charge lithium ion battery, the method for carbon coating processing is specifically: will
Positive active material or negative electrode active material are dipped into respectively in the dispersion liquid of carbon material, by being mixed with dipping cladding processing,
Surface coated positive or negative pole combination electrode material is obtained, then by spray drying granulation, obtains positive or negative pole conduction material
Material.
Preferably, in the preparation method step 1) of this fast charge lithium ion battery, active material (positive or negative pole) and carbon
Cladding carbon material mass ratio used is 1:(0.05~0.3).
Preferably, in the preparation method step 1) of this fast charge lithium ion battery, positive active material is cobalt acid lithium
(LCO), at least one of LiMn2O4 (LMO), LiFePO4 (LFP), nickle cobalt lithium manganate (NCM).
Preferably, in the preparation method step 1) of this fast charge lithium ion battery, negative electrode active material is amphipathic raw material of wood-charcoal
Expect at least one of (ACM), carbonaceous mesophase spherules (MCMB)；It is further preferred that negative electrode active material is that mesocarbon is micro-
Ball.
Preferably, in the preparation method step 1) of this fast charge lithium ion battery, quality of the carbon material in dispersion liquid is dense
Degree is 1%~10%.
Preferably, in the preparation method step 1) of this fast charge lithium ion battery, carbon material be carbon nanotube, carbon fiber,
At least one of carbon ball, soft carbon.
Preferably, in the preparation method step 1) of this fast charge lithium ion battery, the dispersion liquid of carbon material can be carbon material
Alcoholic solution, ketone solution or amide solution.
Preferably, in the preparation method step 2) of this fast charge lithium ion battery, graphene, superconductive carbon black, carbon nanometer
The mass ratio of pipe, dispersing agent and solvent is (0.5~1): (0.5~2): (0.5~1): (0.5~1): 100.
Preferably, in the preparation method step 2) of this fast charge lithium ion battery, dispersing agent is polyvinylpyrrolidone, gathers
At least one of ethylene glycol, polyacrylic acid, polyacrylate.
Preferably, in the preparation method step 2) of this fast charge lithium ion battery, solvent is N-Methyl pyrrolidone
(NMP), propene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate
At least one of ester (EMC).
Preferably, in the preparation method step 3) of this fast charge lithium ion battery, the dosage of conductive slurries accounts for anode respectively
The gross mass 3%~20% of conductive material or negative conductive material.
Preferably, pre- on positive-pole base material or base material of cathode in the preparation method step 3) of this fast charge lithium ion battery
After conductive coating, it is coated with positive electrode coating or cathode coating；Conductive layer with a thickness of 0.5 μm~3 μm, conductive layer is graphite
Alkene, superconductive carbon black, carbon nanotube, Ketjen black, carbon fiber, at least two compositions in carbosphere compounds.
Preferably, in the preparation method step 3) of this fast charge lithium ion battery, positive-pole base material with a thickness of 10 μm~30 μm,
The material of positive-pole base material is preferably aluminium.
Preferably, in the preparation method step 3) of this fast charge lithium ion battery, base material of cathode with a thickness of 5 μm~20 μm,
The material of base material of cathode is preferably copper.
Preferably, in the preparation method step 3) of this fast charge lithium ion battery, the coating layer thickness of positive plate or negative electrode tab
Respectively 70 μm~150 μm, coating edge length in reserve is 10mm~30mm blank.
Preferably, in the preparation method step 4) of this fast charge lithium ion battery, the length of electrode connecting piece be 10mm~
15mm。
Preferably, in the preparation method step 5) of this fast charge lithium ion battery, diaphragm is that porosity is 45%~65%,
Air penetrability≤200s polyethylene diagrams.
Preferably, in the preparation method step 6) of this fast charge lithium ion battery, the metal compound sheet with sealant is band
The Copper-Aluminum compound piece of polyacrylate sealant.
Preferably, in the preparation method step 11) of this fast charge lithium ion battery, the temperature of baking is 70 DEG C~100 DEG C.
Preferably, in the preparation method step 11) of this fast charge lithium ion battery, the injection rate of electrolyte be 4g/Ah~
6g/Ah；Electrolyte is conventional electrolyte, such as lithium hexafluorophosphate electrolyte solution.
A kind of fast charge lithium ion battery is made by above-mentioned preparation method.
The beneficial effects of the present invention are:
The invention discloses it is a kind of can ultrafast charging lithium ion battery, can will shorten in the charging time 15 minutes with
Interior, 6 minutes i.e. chargeable up to 90% or more of battery total electricity.
Compared with prior art, the present invention has the advantage that
1, positive electrode used first passes through carbon nanometer coating-doping in advance and forms excellent conductive layer in its particle surface；2, used
Negative electrode material first passes through soft carbon coating technology in advance and forms excellent conductive layer in its particle surface；3, conductive agent used be graphene,
Superconductive carbon black and CNT etc. are added in electrode slice after combining according to a certain percentage, needed before use with specific dispersing agent with it is molten
Agent mixing dispersion；4, diaphragm used is in special isolation film, and porosity is 45%~65%, air penetrability≤200s；5, battery core knot
Structure: tab is full extreme ear structure, is left white side by electrode slice and forms；6, the present invention can fast charge soft bag lithium ionic cell 10C charge
Time 6min reaches total charging capacity of the constant current than >=90%.
Detailed description of the invention
Fig. 1 is the schematic diagram for forming battery core；
Fig. 2 is the preparation step schematic diagram of connection sheet and the welding of Copper-Aluminum compound piece；
Fig. 3 is the preparation step schematic diagram that connection sheet is cut；
Fig. 4 is the preparation step schematic diagram of connection sheet bending forming；
Fig. 5 is the preparation step schematic diagram of exposed metal piece patch protection；
Fig. 6 is the battery of embodiment 1 in 50A/9C charging voltage-time-temperature curve figure；
Fig. 7 is the battery of embodiment 1 in 50A/9C charging capacity-voltage curve.
Specific embodiment
Attached drawing 1 is the molding battery core schematic diagram of fast charge lithium ion battery of the present invention.Its tab of battery core of the invention is full pole
Ear structure, connection sheet are that have the extraction of double end tab.
Attached drawing 2~5 is the schematic diagram for preparing fast charge lithium ion battery step of the present invention, and wherein Fig. 2 corresponds to above-mentioned preparation
The step 6) of method, Fig. 3 correspond to the step 7) of above-mentioned preparation method, and Fig. 4 corresponds to the step 8) of above-mentioned preparation method, and Fig. 5 is corresponding
The step 9) of above-mentioned preparation method.
Below in conjunction with attached drawing 1~5, the contents of the present invention are described in further detail by specific embodiment.It is real
It applies raw material/device used in example unless otherwise specified, can be obtained from routine business approach.
Embodiment 1
A kind of preparation method of fast charge lithium ion battery, comprising the following steps:
1) NCM523 positive electrode is uniformly mixed with the DMF dispersion liquid containing 5wt% carbon nanotube, NCM523 anode material
Material and the mass ratio of carbon nanotube are 1:0.1, gained mixture are carried out spray drying granulation, classification obtains positive conductive material
Material；Carbonaceous mesophase spherules are uniformly mixed with the alcohol dispersion liquid containing 2wt% soft carbon, the quality of carbonaceous mesophase spherules and soft carbon
Than being classified by gained mixture progress spray drying granulation for 1:0.05, obtaining negative conductive material.
2) graphene, superconductive carbon black, carbon nanotube, polyvinylpyrrolidone and N-Methyl pyrrolidone solvent are pressed into matter
Amount is mixed than 0.8:2:1:0.8:100, obtains conductive slurries.
3) conductive slurries are mixed with positive conductive material 15:100 in mass ratio, is uniformly mixed through high speed dispersion, gained
Positive electrode coating be coated on 12~20 μm of substrates, by being dried to obtain positive plate, positive coating with a thickness of 100 μm；Wherein
Substrate body material used is aluminium foil and coats the conductive layer of 1~2 μ m thick on its surface in advance, and conductive layer is graphene and carbon
Nanotube complex, mass ratio 1:3；Conductive slurries are mixed with negative conductive material 6:100 in mass ratio, through high speed point
Dissipate and be uniformly mixed, resulting cathode coating is coated on 6~10 μm of substrates, obtain negative electrode tab, cathode coating with a thickness of 85 μm；
Wherein substrate body material used is copper foil and coats the conductive layer of 1~2 μ m thick on its surface in advance, and conductive layer is to superconduct
Carbon black and carbon mano-tube composite, mass ratio 1:0.5；Positive plate and the coating edge of negative electrode tab reserve 25mm length respectively
Blank.
4) it is blanked respectively with laser cutting positive plate and the pre- of negative electrode tab, the electrode connecting piece of formation length 15mm.
5) by positive plate, negative electrode tab and the membrane coil squarely battery core after cutting, electrode connecting piece is respectively perpendicular to electricity
Pole length direction laminated type is drawn；Diaphragm used be porosity be 53%, air penetrability be 150s highly-breathable polyethylene every
Film.
6) connection sheet that positive electrode and negative electrode are drawn is surpassed with the Copper-Aluminum compound piece with polyacrylate sealant respectively
Sound is welded together, this preparation step can be found in Fig. 2.
7) connection sheet extra after welding is cut, this preparation step can be found in Fig. 3.
8) by connection sheet with the direction bending forming perpendicular to battery core cross section, this preparation step can be found in Fig. 4.
9) the connection sheet rubberizing exposed to battery core protection, obtains battery core semi-finished product, this preparation step can be found in Fig. 5；Rubberizing
Used is the polyacrylic acid ester gum of rotproofness.
10) battery core semi-finished product are packed into aluminum plastic film box and carry out top side edge sealing, and a reserved side is used as fluid injection.
11) battery core after edge sealing to be toasted, the temperature of baking is 80 DEG C, it is then injected into 5Ah/g electrolyte, partial volume,
Obtain fast charge lithium ion battery.
Embodiment 2
A kind of preparation method of fast charge lithium ion battery, comprising the following steps:
1) lithium iron phosphate positive material is uniformly mixed with the alcohol dispersion liquid containing 5wt% carbon nanotube, LiFePO4
Positive electrode and the mass ratio of carbon nanotube are 1:0.12, gained mixture are carried out spray drying granulation, classification obtains anode
Conductive material；Carbonaceous mesophase spherules are uniformly mixed with the alcohol dispersion liquid containing 3wt% soft carbon, carbonaceous mesophase spherules and soft carbon
Mass ratio be 1:0.15, by gained mixture carry out spray drying granulation, classification, obtain negative conductive material.
2) graphene, superconductive carbon black, carbon nanotube, polyvinylpyrrolidone and N-Methyl pyrrolidone solvent are pressed into matter
Amount is mixed than 0.8:2:0.8:0.5:100, obtains conductive slurries.
3) conductive slurries are mixed with positive conductive material 20:100 in mass ratio, is uniformly mixed through high speed dispersion, gained
Positive electrode coating be coated on 12~20 μm of substrates, by being dried to obtain positive plate, positive coating with a thickness of 100 μm；Wherein
Substrate body material used is aluminium foil and coats the conductive layer of 1~2 μ m thick on its surface in advance, and conductive layer is graphene and carbon
Nanotube complex, mass ratio 1:3；Conductive slurries are mixed with negative conductive material 7:100 in mass ratio, through high speed point
Dissipate and be uniformly mixed, resulting cathode coating is coated on 6~10 μm of substrates, obtain negative electrode tab, cathode coating with a thickness of 85 μm；
Wherein substrate body material used is copper foil and coats the conductive layer of 1~2 μ m thick on its surface in advance, and conductive layer is to superconduct
Carbon black and carbon mano-tube composite, mass ratio 1:0.5；Positive plate and the coating edge of negative electrode tab reserve 20mm length respectively
Blank.
4) it is blanked respectively with laser cutting positive plate and the pre- of negative electrode tab, the electrode connecting piece of formation length 10mm.
5) by positive plate, negative electrode tab and the membrane coil squarely battery core after cutting, electrode connecting piece is respectively perpendicular to electricity
Pole length direction laminated type is drawn；Diaphragm used be porosity be 55%, air penetrability be 180s highly-breathable polyethylene every
Film.
6) connection sheet that positive electrode and negative electrode are drawn is surpassed with the Copper-Aluminum compound piece with polyacrylate sealant respectively
Sound is welded together, this preparation step can be found in Fig. 2.
7) connection sheet extra after welding is cut, this preparation step can be found in Fig. 3.
8) by connection sheet with the direction bending forming perpendicular to battery core cross section, this preparation step can be found in Fig. 4.
9) the connection sheet rubberizing exposed to battery core protection, obtains battery core semi-finished product, this preparation step can be found in Fig. 5；Rubberizing
Used is the polyacrylic acid ester gum of rotproofness.
10) battery core semi-finished product are packed into aluminum plastic film box and carry out top side edge sealing, and a reserved side is used as fluid injection.
11) battery core after edge sealing to be toasted, the temperature of baking is 90 DEG C, it is then injected into 5Ah/g electrolyte, partial volume,
Obtain fast charge lithium ion battery.
Embodiment 3
A kind of preparation method of fast charge lithium ion battery, comprising the following steps:
1) LiMn2O4 is uniformly mixed with lithium cobaltate cathode material with the DMF dispersion liquid containing 5wt% carbon nanotube, mangaic acid
Lithium anode material and the mass ratio of carbon nanotube are 1:0.12, and the mass ratio of lithium cobaltate cathode material and carbon nanotube is 1:
0.12, gained mixture is subjected to spray drying granulation, classification obtains positive conductive material；By carbonaceous mesophase spherules with contain
The alcohol dispersion liquid of 4.5wt% soft carbon is uniformly mixed, and the mass ratio of carbonaceous mesophase spherules and soft carbon is 1:0.1, and gained is mixed
Object carries out spray drying granulation, and classification obtains negative conductive material.
2) graphene, superconductive carbon black, carbon nanotube, polyvinylpyrrolidone and N-Methyl pyrrolidone solvent are pressed into matter
Amount is mixed than 0.5:1:1:0.5:100, obtains conductive slurries.
3) conductive slurries are mixed with positive conductive material 20:100 in mass ratio, is uniformly mixed through high speed dispersion, gained
Positive electrode coating be coated on 12~20 μm of substrates, by being dried to obtain positive plate, positive coating with a thickness of 110 μm；Wherein
Substrate body material used is aluminium foil and coats the conductive layer of 1~2 μ m thick on its surface in advance, and conductive layer is graphene and carbon
Nanotube complex, mass ratio 1:3；Conductive slurries are mixed with negative conductive material 7:100 in mass ratio, through high speed point
Dissipate and be uniformly mixed, resulting cathode coating is coated on 6~10 μm of substrates, obtain negative electrode tab, cathode coating with a thickness of 80 μm；
Wherein substrate body material used is copper foil and coats the conductive layer of 1~2 μ m thick on its surface in advance, and conductive layer is to superconduct
Carbon black and carbon mano-tube composite, mass ratio 1:0.5；Positive plate and the coating edge of negative electrode tab reserve 20mm length respectively
Blank.
4) it is blanked respectively with laser cutting positive plate and the pre- of negative electrode tab, the electrode connecting piece of formation length 10mm.
5) by positive plate, negative electrode tab and the membrane coil squarely battery core after cutting, electrode connecting piece is respectively perpendicular to electricity
Pole length direction laminated type is drawn；Diaphragm used be porosity be 55%, air penetrability be 180s highly-breathable polyethylene every
Film.
6) connection sheet that positive electrode and negative electrode are drawn is surpassed with the Copper-Aluminum compound piece with polyacrylate sealant respectively
Sound is welded together, this preparation step can be found in Fig. 2.
7) connection sheet extra after welding is cut, this preparation step can be found in Fig. 3.
8) by connection sheet with the direction bending forming perpendicular to battery core cross section, this preparation step can be found in Fig. 4.
9) the connection sheet rubberizing exposed to battery core protection, obtains battery core semi-finished product, this preparation step can be found in Fig. 5；Rubberizing
Used is the polyacrylic acid ester gum of rotproofness.
10) battery core semi-finished product are packed into aluminum plastic film box and carry out top side edge sealing, and a reserved side is used as fluid injection.
11) battery core after edge sealing to be toasted, the temperature of baking is 90 DEG C, it is then injected into 5Ah/g electrolyte, partial volume,
Obtain fast charge lithium ion battery.
The visible attached drawing 1 of fast charge lithium ion battery finished product battery core being prepared by embodiment.
Performance test
Battery capacity and internal resistance: the capacity at normal temperature of battery obtained by Examples 1 to 3 and inner walkway the results are shown in Table
1。
The battery capacity and internal resistance of 1 embodiment 1-3 of table
| Sample number into spectrum | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Capacity (Ah) | 5.543 | 5.542 | 5.530 |
| Internal resistance (m Ω) | 0.82 | 0.82 | 0.77 |
The test of high/low temperature multiplying power discharging: the battery of embodiment 1 is subjected to the test of high/low temperature multiplying power discharging, with 1C electric current constant current
Constant pressure is fully charged, then goes to discharge with different multiplying electric current at different temperature, and discharge capacity and conservation rate situation are shown in Table 2.
2 embodiment of table, 1 battery high/low temperature rate discharge test results
Room temperature charging performance: attached drawing 6 is the battery of embodiment 1 in 50A/9C charging voltage-time-temperature curve figure.From
Fig. 6, which can be seen that, only can be raised to the voltage of battery 4.20V for 45 seconds with 5 points under the conditions of 50A constant-current charge, and entire
Charging process battery surface temperature is lower than 45 DEG C.Attached drawing 7 is the battery of embodiment 1 in 50A/9C charging capacity-voltage curve.
In conjunction with Fig. 7 in the charging capacity ratio of 4.20V it is found that when charging voltage reaches 4.20V, the charging ratio > 90% of battery.
Rate of charge under different temperatures: the battery of embodiment 1 is first vented electricity with 1C electric current, respectively at different temperatures
It shelves and constant-current charge is carried out with different multiplying after 12h, test its charging performance.The results are shown in Table 3.
Charging performance under 3 embodiment of table, 1 battery different temperatures
Cycle performance: the battery of embodiment 1,2 and 3 is subjected to cyclic charging and discharging test at 1C, at loop test 300 times
Afterwards, the circulating battery conservation rate of embodiment 1,2 and 3 is respectively 93.6%, 92.7% and 93.1%, and cycle performance is good.
Claims (10)
1. a kind of preparation method of fast charge lithium ion battery, it is characterised in that: the following steps are included:
1) positive active material and negative electrode active material are subjected to carbon coating processing respectively, positive conductive material is obtained and cathode is led
Electric material；
2) graphene, superconductive carbon black, carbon nanotube, dispersing agent and solvent are mixed, obtains conductive slurries；
3) conductive slurries are mixed with positive conductive material, resulting positive electrode coating is coated on positive-pole base material, obtains positive plate；
Conductive slurries are mixed with negative conductive material, resulting cathode coating is coated on base material of cathode, obtains negative electrode tab；Positive plate
It blanks in advance respectively with the coating edge of negative electrode tab；
4) positive plate is respectively cut and the pre- of negative electrode tab blanks, forms electrode connecting piece；
5) by positive plate, negative electrode tab and the membrane coil squarely battery core after cutting, electrode connecting piece is respectively long perpendicular to electrode
Direction lamination formula is spent to draw；
6) connection sheet that positive electrode and negative electrode are drawn is welded with the metal compound sheet with sealant respectively；
7) connection sheet extra after welding is cut；
8) by connection sheet with the direction bending forming perpendicular to battery core cross section；
9) the connection sheet rubberizing exposed to battery core protection, obtains battery core semi-finished product；
10) battery core semi-finished product are subjected to top side edge sealing, and reserved fluid injection side；
11) battery core after edge sealing is toasted, is then injected into electrolyte, partial volume obtains fast charge lithium ion battery.
2. a kind of preparation method of fast charge lithium ion battery according to claim 1, it is characterised in that: in step 1), carbon
The method of cladding processing is specifically: positive active material or negative electrode active material are dipped into the dispersion liquid of carbon material respectively
In, by being mixed with dipping cladding processing, surface coated positive or negative pole combination electrode material is obtained, then make by spray drying
Grain, obtains positive or negative pole conductive material；Wherein, positive active material is cobalt acid lithium, LiMn2O4, LiFePO4, nickel cobalt mangaic acid
At least one of lithium；Negative electrode active material is at least one of amphipathic Carbon Materials, carbonaceous mesophase spherules；Carbon material is carbon
At least one of nanotube, carbon fiber, carbon ball, soft carbon.
3. a kind of preparation method of fast charge lithium ion battery according to claim 1, it is characterised in that: in step 2), stone
Black alkene, superconductive carbon black, carbon nanotube, dispersing agent and solvent mass ratio be (0.5~1): (0.5~2): (0.5~1):
(0.5~1): 100；The dispersing agent be polyvinylpyrrolidone, polyethylene glycol, polyacrylic acid, in polyacrylate at least
It is a kind of.
4. a kind of preparation method of fast charge lithium ion battery according to claim 1, it is characterised in that: in step 3), lead
The dosage of plasma-based liquid accounts for the gross mass 3%~20% of positive conductive material or negative conductive material respectively.
5. a kind of preparation method of fast charge lithium ion battery according to claim 1 or 4, it is characterised in that: in step 3),
Positive plate or the coating layer thickness of negative electrode tab are respectively 70 μm~150 μm, and coating edge length in reserve is 10mm~30mm blank.
6. a kind of preparation method of fast charge lithium ion battery according to claim 1, it is characterised in that: in step 4), electricity
The length of pole connection sheet is 10mm~15mm.
7. a kind of preparation method of fast charge lithium ion battery according to claim 1, it is characterised in that: in step 5), every
Film is that porosity is 45%~65%, air penetrability≤200s polyethylene diagrams.
8. a kind of preparation method of fast charge lithium ion battery according to claim 1, it is characterised in that: in step 6), band
The metal compound sheet of sealant is the Copper-Aluminum compound piece with polyacrylate sealant.
9. a kind of preparation method of fast charge lithium ion battery according to claim 1, it is characterised in that: in step 11), dry
Roasting temperature is 70 DEG C~100 DEG C；The injection rate of electrolyte is 4g/Ah~6g/Ah.
10. a kind of fast charge lithium ion battery, it is characterised in that: be made by preparation method according to any one of claims 1 to 9.
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| CN112582667A (en) * | 2020-04-04 | 2021-03-30 | 骆驼集团武汉新能源科技有限公司 | High-power lithium ion battery for automobile start-stop power supply |
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| CN101286577A (en) * | 2008-05-23 | 2008-10-15 | 清华大学 | Lithium ion power cell with high power |
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| CN101286577A (en) * | 2008-05-23 | 2008-10-15 | 清华大学 | Lithium ion power cell with high power |
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| CN106169617A (en) * | 2016-09-30 | 2016-11-30 | 上海空间电源研究所 | A kind of space safety high power lithium ion accumulator |
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| CN112582667A (en) * | 2020-04-04 | 2021-03-30 | 骆驼集团武汉新能源科技有限公司 | High-power lithium ion battery for automobile start-stop power supply |
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| CN109786854B (en) | 2022-04-22 |
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