CN205159419U - Positive plate and battery - Google Patents
Positive plate and battery Download PDFInfo
- Publication number
- CN205159419U CN205159419U CN201520940494.1U CN201520940494U CN205159419U CN 205159419 U CN205159419 U CN 205159419U CN 201520940494 U CN201520940494 U CN 201520940494U CN 205159419 U CN205159419 U CN 205159419U
- Authority
- CN
- China
- Prior art keywords
- active material
- positive plate
- material layer
- battery
- anode active
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002033 PVDF binder Substances 0.000 claims abstract description 33
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 33
- 239000006183 anode active material Substances 0.000 claims description 40
- 239000005030 aluminium foil Substances 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 7
- 229910001416 lithium ion Inorganic materials 0.000 claims description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 4
- 239000007773 negative electrode material Substances 0.000 abstract description 6
- 239000011149 active material Substances 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000007774 positive electrode material Substances 0.000 description 4
- 230000036647 reaction Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000006258 conductive agent Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000001467 acupuncture Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003571 electronic cigarette Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to a positive plate, this positive plate include the anodal mass flow body and positive pole active material layer, the anodal mass flow body is including being located the supporting region at anodal mass flow body middle part and being located the exposed district of supporting region both sides, positive pole active material layer covers on the supporting region, the positive plate still includes polyvinylidene fluoride, polyvinylidene fluoride cover in in the exposed district. The utility model discloses a positive plate is owing to set up polyvinylidene fluoride, therefore can effectively avoid the contact between physically of negative active material and anodal mass flow, and then avoids the problem that the battery short circuit brought. The utility model further discloses the battery.
Description
Technical field
The utility model relates to field of batteries, particularly relates to a kind of positive plate and battery.
Background technology
Battery is widely used in the fields such as mobile phone, panel computer, wearable device, portable power source, electronic cigarette, various digital product, electric tool, power, energy storage, and the application of its market is wide, potentiality are large.The security requirement of industry to battery is more and more higher, and that improves battery security becomes a kind of urgent and general requirement.
In the battery, the voltage difference between negative pole with positive pole is higher, once both both positive and negative polarities contact, can cause battery short circuit, can cause violent reaction, battery temperature is sharply raised, uncontrollable thermal failure occurs, and namely occurs on firely even to explode.At present, what cause battery plus-negative plate to contact is generally contact between negative electrode active material and plus plate current-collecting body or the contact between both positive and negative polarity collector.In order to avoid problems such as the battery short circuits that this kind of contact causes, way is traditionally, at the end sticking cloth of positive plate.But this way is curling because adhesive plaster viscosity weakens sometimes, makes plus plate current-collecting body again exposed, thus does not reach the effect of pre-against short-circuit.This way can make the thickness of battery increase in addition, and causes the problems such as cell thickness lack of homogeneity, out-of-flatness or battery hardness variation.
Utility model content
Based on this, be necessary the problem for the easy short circuit of existing battery, a kind of positive plate that effectively can prevent battery short circuit is provided.
A kind of positive plate, comprises plus plate current-collecting body and anode active material layer; Described plus plate current-collecting body comprises the supporting region be positioned in the middle part of described plus plate current-collecting body and the exposed area being positioned at described supporting region both sides, and described anode active material layer covers on described supporting region; Described positive plate also comprises polyvinylidene fluoride, and described polyvinylidene fluoride is covered on described exposed area.
Above-mentioned positive plate is owing to arranging polyvinylidene fluoride; under making plus plate current-collecting body be in the protection of polyvinylidene fluoride; thus effectively can avoid the contact between contact between negative electrode active material and plus plate current-collecting body or both positive and negative polarity collector, and then the problem avoiding battery short circuit to bring.
Wherein in an embodiment, the thickness of described polyvinylidene fluoride is 0.2 ~ 20 μm.
Wherein in an embodiment, described polyvinylidene fluoride also part is covered in described anode active material layer.
Wherein in an embodiment, the width that described polyvinylidene fluoride covers described anode active material layer is 1 ~ 10mm.
Wherein in an embodiment, the thickness of described anode active material layer is 5 ~ 200 μm.
Wherein in an embodiment, the thickness of described plus plate current-collecting body is 5 ~ 200 μm.
Wherein in an embodiment, described plus plate current-collecting body is aluminium foil.
The utility model additionally provides a kind of battery, and it comprises positive plate, negative plate and electrolyte; Wherein, described positive plate is positive plate provided by the utility model.
Above-mentioned battery, owing to adopting positive plate provided by the utility model, so effectively can avoid the problem of contact between negative electrode active material and plus plate current-collecting body and battery short circuit.
Wherein in an embodiment, described negative plate comprises negative current collector and anode active material layer; The described anode active material layer of part and the described exposed area of part are oppositely arranged.
Wherein in an embodiment, described battery is lithium ion battery, and described plus plate current-collecting body is aluminium foil.
Accompanying drawing explanation
Fig. 1 is the structural representation of the positive plate of the utility model one execution mode.
Fig. 2 is the structural representation of the battery of the utility model one execution mode.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
See Fig. 1, the positive plate 100 of the utility model one execution mode, comprises plus plate current-collecting body 110 and anode active material layer 120.
Wherein, the effect of plus plate current-collecting body 110 is, electric current anode active material layer 120 being reacted when battery charging and discharging produced is derived.Plus plate current-collecting body 110 does not generally participate in cell reaction, in cell reaction, keep inertia.
Particularly, plus plate current-collecting body 110 is aluminium foil.Certainly, plus plate current-collecting body 110 is not limited to aluminium foil, can also adopt other plus plate current-collecting bodies known in those skilled in the art.
Particularly, the thickness of plus plate current-collecting body 110 is preferably 5 ~ 200 μm.
Wherein, plus plate current-collecting body 110 comprises and is positioned at the supporting region 111 be connected in the middle part of plus plate current-collecting body 110 and with this anode active material layer 120 and the exposed area 112 being positioned at supporting region 111 both sides.Supporting region 111 is identical with the bearing of trend of plus plate current-collecting body 110 with exposed area 112, and its bearing of trend is its length direction, and the direction along plus plate current-collecting body 110 surface perpendicular to length direction is its Width.Supporting region 111 covers anode active material layer 120, supporting region 111 Main Function provides carrier for anode active material layer 120 and drawn by the electric current in anode active material layer 120.And the Main Function of exposed area 112 is, the electric current of supporting region 111 is led to lug or directly lead to battery external electrode.
Anode active material layer 120 is primarily of positive electrode active materials particle and other auxiliary materials such as conductive agent, binding agent composition.Positive electrode active materials particle in anode active material layer 120 participates in cell reaction in the charge and discharge process of battery.Positive electrode active materials particle and conductive agent, binding agent all could select various material known in those skilled in the art, do not repeat them here! Those skilled in the art can select suitable anode active material layer according to different cell reactions.
Particularly, the thickness of anode active material layer 120 is preferably 5 ~ 200 μm.
Positive plate 100 of the present utility model also comprises polyvinylidene fluoride 130, and polyvinylidene fluoride 130 is covered on exposed area 112.Polyvinylidene fluoride 130 is non-conductive, effectively can avoid the contact between contact between negative electrode active material and plus plate current-collecting body or both positive and negative polarity collector, and polyvinylidene fluoride 130 Absorbable organic halogens is present in battery, can't affect the normal performance of battery.
Particularly, the thickness of polyvinylidene fluoride 130 is 0.2 ~ 20 μm.Affect minimum on positive plate 100 and cell thickness like this, thus guarantee planarization, the uniformity of hardness of battery.Certainly, also according to actual conditions, the thickness of polyvinylidene fluoride 130 can be made the appropriate adjustments.
Particularly, polyvinylidene fluoride 130 is also partly covered in anode active material layer 120.Like this when polyvinylidene fluoride 130 is covered exposed area 112, accurate coating machines need not be adopted, also not be used in the part of anode active material layer 120 near exposed area 112 to arrange for blocking blocking of polyvinylidene fluoride 130, thus greatly reduce the difficulty of coating operation, be convenient to the preparation of positive plate.
More specifically, polyvinylidene fluoride 130 covers the width of anode active material layer 120 is 1 ~ 10mm.The distance that such polyvinylidene fluoride 130 gos deep into anode active material layer is less, can ensure that polyvinylidene fluoride 130 is lower on the impact of anode active material layer in battery charge and discharge process.
Positive plate of the present utility model; owing to arranging polyvinylidene fluoride 130; under making plus plate current-collecting body 110 particularly its exposed area 112 being in the protection of polyvinylidene fluoride 130; thus effectively can avoid the contact between contact between negative electrode active material and plus plate current-collecting body 110 or both positive and negative polarity collector, and then the problem avoiding battery short circuit to bring.
The utility model additionally provides a kind of battery.
See Fig. 2, the battery 300 of the utility model one execution mode, comprises positive plate 100, negative plate 200 and electrolyte (not shown).
Positive plate is positive plate provided by the utility model, does not repeat them here wherein!
Wherein, electrolyte is between anode active material layer 120 and anode active material layer 220.Electrolytical form can be gel state, also solid-state or liquid.Electrolyte could adopt various electrolyte known in those skilled in the art, does not repeat them here!
Wherein, negative plate 200 comprises negative current collector 210 and anode active material layer 220.In the present embodiment, the width of anode active material layer 220 is greater than the width of anode active material layer 120, and also namely part anode active material layer 220 is relative with the exposed area 112 of part plus plate current-collecting body 110.
Battery 300 in present embodiment is lithium ion battery, is more specifically polymer Li-ion battery.Certainly, also can be other lithium ion batteries, also or other battery.
Below in conjunction with specific embodiment, the utility model is further elaborated.
Embodiment 1
Anode active material layer (50 μm, positive electrode active materials cobalt acid lithium+conductive agent graphite+binding agent PVDF) is formed in the central region of plus plate current-collecting body (aluminium foils of 10 μm).The width of anode active material layer is 800mm.
Apply polyvinylidene fluoride (1 μm) in the exposed area of plus plate current-collecting body with in the anode active material layer of exposed area, then obtain positive plate.
Anode active material layer (50 μm, graphite) is formed in the central region of negative current collector (Copper Foils of 6 μm).The width of anode active material layer is 850mm.Then negative plate is obtained.
Positive plate, negative plate and electrolyte are assembled into battery.
The battery obtained, is denoted as A1.
Comparative example 1
Be replace polyvinylidene fluoride with normal transparent adhesive plaster with embodiment 1 difference, normal transparent adhesive plaster sticked in the region of polyvinylidene fluoride coating in embodiment 1.Other parts are identical with embodiment 1.The battery obtained, is denoted as B1.
Carry out short circuit for A1 and B1 battery respectively, overcharge, hot case, the test such as acupuncture and heavy impact.In 1000 batteries, inspect 10 by random samples, calculate its probability of acceptance of spot check, result of calculation is in table 1.
Table 1
As can be seen from Table 1, the battery in embodiment 1, in the tests such as short circuit, hot case, acupuncture, heavy impact, its probability of acceptance of spot check is much larger than comparative example 1.This illustrates positive plate provided by the utility model, effectively can improve the security performance of battery.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. a positive plate, comprises plus plate current-collecting body and anode active material layer; Described plus plate current-collecting body comprises the supporting region be positioned in the middle part of described plus plate current-collecting body and the exposed area being positioned at described supporting region both sides, and described anode active material layer covers on described supporting region;
It is characterized in that, described positive plate also comprises polyvinylidene fluoride, and described polyvinylidene fluoride is covered on described exposed area.
2. positive plate according to claim 1, is characterized in that, the thickness of described polyvinylidene fluoride is 0.2 ~ 20 μm.
3. positive plate according to claim 1, is characterized in that, described polyvinylidene fluoride also part is covered in described anode active material layer.
4. positive plate according to claim 3, is characterized in that, the width that described polyvinylidene fluoride covers described anode active material layer is 1 ~ 10mm.
5. positive plate according to claim 3, is characterized in that, the thickness of described anode active material layer is 5 ~ 200 μm.
6. the positive plate according to any one of claim 1-5, is characterized in that, the thickness of described plus plate current-collecting body is 5 ~ 200 μm.
7. the positive plate according to any one of claim 1-5, is characterized in that, described plus plate current-collecting body is aluminium foil.
8. a battery, comprises positive plate, negative plate and electrolyte; It is characterized in that, described positive plate is the positive plate described in any one of claim 1-7.
9. battery according to claim 8, is characterized in that, described negative plate comprises negative current collector and anode active material layer; The described anode active material layer of part and the described exposed area of part are oppositely arranged.
10. battery according to claim 9, is characterized in that, described battery is lithium ion battery, and described plus plate current-collecting body is aluminium foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520940494.1U CN205159419U (en) | 2015-11-20 | 2015-11-20 | Positive plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520940494.1U CN205159419U (en) | 2015-11-20 | 2015-11-20 | Positive plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205159419U true CN205159419U (en) | 2016-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520940494.1U Active CN205159419U (en) | 2015-11-20 | 2015-11-20 | Positive plate and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205159419U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980170A (en) * | 2017-12-28 | 2019-07-05 | 宁德新能源科技有限公司 | Electrode assembly and battery |
-
2015
- 2015-11-20 CN CN201520940494.1U patent/CN205159419U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980170A (en) * | 2017-12-28 | 2019-07-05 | 宁德新能源科技有限公司 | Electrode assembly and battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Co-patentee after: HUIZHOU TECHNE Corp. Patentee after: HUIZHOU JINNENG BATTERY CO.,LTD. Address before: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Co-patentee before: HUIZHOU TECHNE Corp. Patentee before: HUIZHOU TCL HYPERPOWER BATTERIES Inc. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180726 Address after: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Patentee after: HUIZHOU JINNENG BATTERY CO.,LTD. Address before: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Co-patentee before: HUIZHOU TECHNE Corp. Patentee before: HUIZHOU JINNENG BATTERY CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Patentee after: Huizhou Yiwei Energy Battery Co.,Ltd. Address before: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Patentee before: HUIZHOU JINNENG BATTERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230920 Address after: 516000 No. 38, Huifeng 7th Road, Zhongkai High-tech Zone, Huizhou City, Guangdong Province Patentee after: EVE ENERGY Co.,Ltd. Address before: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Patentee before: Huizhou Yiwei Energy Battery Co.,Ltd. |
|
| TR01 | Transfer of patent right |