CN209298283U - A kind of lamination promoting battery core safety - Google Patents
A kind of lamination promoting battery core safety Download PDFInfo
- Publication number
- CN209298283U CN209298283U CN201920061788.5U CN201920061788U CN209298283U CN 209298283 U CN209298283 U CN 209298283U CN 201920061788 U CN201920061788 U CN 201920061788U CN 209298283 U CN209298283 U CN 209298283U
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- CN
- China
- Prior art keywords
- negative electrode
- electrode tab
- isolation film
- lamination
- film
- 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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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model discloses a kind of laminations for promoting battery core safety, including negative lug, lamination main body, isolation film and the second locating slot, one end of the lamination main body is provided with negative electrode tab, and the side on negative electrode tab top is provided with negative lug, the second film is provided in the negative lug, one end of the negative electrode tab is evenly arranged with the second locating piece, one end of the negative electrode tab is provided with isolation film, and isolation film is evenly arranged with and mutually matched second locating slot of the second locating piece close to one end of negative electrode tab, the isolation film is internally provided with anti-corrosion layer, the isolation film is provided with positive plate far from one end of negative electrode tab, and the other side on positive plate top is provided with positive pole ear, the first film is provided on the positive pole ear.The utility model has different by stacking dislocation size and the conventional dislocation size that stacks to lithium ion soft-package battery production technology lamination process positive plate and negative electrode tab, can promote battery core security performance.
Description
Technical field
The utility model relates to battery core technical field, specially a kind of lamination for promoting battery core safety.
Background technique
The problem of due to energy shortages and environmental pollution, electric car are obtaining quick swift and violent hair in the latest 20 years
Exhibition, in recent years, be determined under the background for greatly developing new-energy automobile in China, after especially 2014, include country and
Under the promotion of strong serial policy including local two-stage great number " subsidy ", the ecology potential of new-energy automobile industry can not
Gear, and as the commercial applications quantity of electric car increases, the spontaneous combustion of lithium ion power battery used for electromobile, explosion on fire
Event happens occasionally, and is at present exactly the crucial opportunity of electric car industry development, any safety accident of electric car together is not only
Significant impact, and the heavy blow to entire industry only are caused to the manufacturing enterprise when thing, so promoting the peace of power battery
Full property is that entire industry and each manufacturing enterprise need to pay attention to the critical issue promoted.
Existing similar implementation: existing routine Soft Roll lamination positive and negative anodes stack mode and are up and down, are dislocated distance
Size is consistent (that is: positive and negative anodes top edge distance A=positive and negative anodes lower edge distance B), and dislocation size is equal are as follows: 1 ~ 4mm(, that is, positive and negative electrode
On piece Edge Distance is equal apart from design size with positive and negative plate lower edge), there are following design disadvantages for existing lamination:
1, it is that dislocation size is consistent (ipsilateral tab is upward) up and down that existing conventional Soft Roll lamination positive and negative anodes, which stack mode, because just
Negative electrode lug charge and discharge process current convergence density is big, and the region fevers more other than battery core body of tab negative regions are serious, and battery is big
Multiplying power iterative cycles charge and discharge fever metacneme has certain contraction, and anode ear foil has touching negative electrode tab edge to cause moment
The security risk of internal short-circuit burning；
2, in tab dressing width in 0.5 ~ 2mm after existing design positive and negative plate is punched, if pole piece laminating heap poststack is just
Tab dressing width is greater than cathode dressing width, and battery core is in the easy heap of repeated charge process anode ear dressing near zone lithium ion
Product forms Li dendrite, and there is puncture diaphragm to cause battery core internal short-circuit burning risk；
3, battery core is in ultrasonic bonding after lamination, and because energy is larger, the soldering tip temperature after continuous welding is higher, to close
After tab diaphragm has certain heat to impact, diaphragm has the risk centainly shunk, and positive top edge dislocation is bigger than normal to make diaphragm more
Effectively package positive plate；
4, the main tab of the higher reason of soft pack cell internal short-circuit combustion rate and negative electrode tab top are shorted and cause or cathode
Ear dressing Li dendrite accumulation nearby is pierced through diaphragm afterwards to a certain degree and is caused with positive plate edge shorting, and by multiplexing after lamination
After sequence circulation movement (coat not tight, sucker manipulator, Tab welding after lamination, coating, be pressurized and survey short circuit etc.), cause in battery core
Portion's positive and negative plate has certain stress to shift, and 1 ~ 4 layer of outer layer positive/negative plate is easier to misplace, and promotion tab is short with pole piece top edge
Transportation work style danger；
Utility model content
The purpose of this utility model is to provide a kind of laminations for promoting battery core safety, to solve above-mentioned background technique
The anode ear foil of middle proposition has touching negative electrode tab edge to cause the security risk of minute internal short circuit burning, have and pierce through diaphragm
Cause battery core internal short-circuit burning risk, diaphragm have the risk centainly shunk and tab and pole piece top edge short-circuit risks
Big problem.
To achieve the above object, the utility model provides the following technical solutions: a kind of lamination promoting battery core safety,
Including negative lug, lamination main body, isolation film and the second locating slot, one end of the lamination main body is provided with negative electrode tab, and negative
The side on pole piece top is provided with negative lug, and the second film is provided in the negative lug, and one end of the negative electrode tab is equal
Even to be provided with the second locating piece, one end of the negative electrode tab is provided with isolation film, and isolation film is uniform close to one end of negative electrode tab
Be provided with and be internally provided with anti-corrosion layer with mutually matched second locating slot of the second locating piece, the isolation film, it is described every
One end of negative electrode tab is provided with positive plate from film, and the other side on positive plate top is provided with positive pole ear, the anode
The first film is provided on tab.
Preferably, the distance of the positive plate and negative electrode tab top edge is bigger than positive plate and the lower edge of negative electrode tab distance
0.5-15mm。
Preferably, the surface area of the negative electrode tab, isolation film and positive plate successively reduces.
Preferably, the surface of the isolation film is provided with insulating layer.
Preferably, the inside of the isolation film is uniformly arranged hole, and hole is equally arranged in the inside of isolation film
Column.
Preferably, it is evenly arranged with the first locating slot on isolation film of the isolation film far from one end of negative electrode tab, it is described
Positive plate is evenly arranged with and mutually matched first locating piece of the first locating slot, first positioning close to one end of isolation film
It is snap-in structure between block and the first locating slot.
Compared with prior art, the utility model has the beneficial effects that the lamination structure of the promotion battery core safety is closed
Reason, has the advantage that
1, by lithium ion soft-package battery production technology lamination process positive plate and negative electrode tab stack dislocation size and often
Rule, which stack dislocation size, different, can promote battery core security performance, positive/negative plate is Soft Roll rectangular cell, and after lamination
Positive and negative extremely ipsilateral tab, negative electrode tab dressing area size have to be larger than and cover positive plate dressing area；One is first placed when stacking
The negative electrode tab of regulatory specifications size, successively stacks the isolation film of one layer of predetermined size, then stacks a positive plate, by negative electrode tab →
Isolation film → positive plate stacks the regulation number of plies repeatedly, and outermost layer is negative electrode tab.
2, when stacking positive plate, positive plate top edge and negative electrode tab top edge distance are A, positive plate lower edge and negative electrode tab
Lower edge distance is A-0.5 ~ 1.5mm=B, because top margin (i.e. positive plate top edge and negative electrode tab top edge) has and widens, isolation film
More effectively clad anode piece, positive pole ear and negative lug, isolation film there can be certain contraction after Tab is welded or is toasted,
Positive pole ear and the corresponding negative electrode tab of negative lug can more effectively be reduced and risk that positive plate edge is shorted, it can also be with
Reduce the risk that the Li dendrite near positive pole ear and negative lug is shorted positive plate and negative electrode tab.
3, by being provided with the first film on positive pole ear, and the second film is provided in negative lug, first
Film and the second film are the parts insulated in positive pole ear and negative lug, and metal tape is prevented when its effect is cell package
It is bonded together by heating (140 DEG C or so) with aluminum plastic film hot-melting sealed when short circuit occurring between aluminum plastic film, and encapsulating
Prevent leakage.
Detailed description of the invention
Fig. 1 faces the schematic diagram of the section structure for the utility model；
Fig. 2 is the side structure schematic view of the utility model；
Fig. 3 is the isolation film side elevational cross-section structural schematic diagram of the utility model.
In figure: 1, negative lug；2, positive plate；3, negative electrode tab；4, lamination main body；5, isolation film；6, positive pole ear；7,
One film；8, the first locating piece；9, the first locating slot；10, the second locating slot；11, the second locating piece；12, the second film；13,
Insulating layer；14, anti-corrosion layer；15, hole.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-3 is please referred to, a kind of embodiment provided by the utility model: a kind of lamination promoting battery core safety, packet
Negative lug 1, lamination main body 4, isolation film 5 and the second locating slot 10 are included, one end of lamination main body 4 is provided with negative electrode tab 3, and negative
The side on 3 top of pole piece is provided with negative lug 1, and the surface area of negative electrode tab 3, isolation film 5 and positive plate 2 successively reduces, is convenient for
Isolation film 5 can wrap up positive plate 2, negative lug 1 and positive pole ear 6, and the second film 12, cathode are provided in negative lug 1
One end of piece 3 is evenly arranged with the second locating piece 11, and one end of negative electrode tab 3 is provided with isolation film 5, and isolation film 5 is close to cathode
One end of piece 3 be evenly arranged with mutually matched second locating slot 10 of the second locating piece 11, the inside of isolation film 5 is uniformly arranged
Hole 15, and hole 15 is equally arranged in the inside of isolation film 5, optimizes the structure of this product, the surface of isolation film 5 is set
Be equipped with insulating layer 13, increase insulating properties, guarantee the mechanical isolation of positive plate 2 and negative electrode tab 3, isolation film 5 far from negative electrode tab 3 one
The first locating slot 9 is evenly arranged on the isolation film 5 at end, positive plate 2 is evenly arranged with close to one end of isolation film 5 to be determined with first
Position mutually matched first locating piece 8 of slot 9 is snap-in structure between first locating piece 8 and the first locating slot 9, convenient for positioning, group
Dress is convenient, and more accurately, isolation film 5 is internally provided with anti-corrosion layer 14, and isolation film 5 is provided with far from one end of negative electrode tab 3
Positive plate 2, and the other side on 2 top of positive plate is provided with positive pole ear 6, the distance ratio of 3 top edge of positive plate 2 and negative electrode tab is just
Apart from big 0.5-15mm, 2 top edge of top margin, that is, positive plate has with 3 top edge of negative electrode tab to be added for pole piece 2 and the lower edge of negative electrode tab 3
Width, isolation film 5 can more effectively clad anode piece 2, negative lug 1 and positive pole ear 6, isolation film 5 have after Tab is welded or is toasted
Certain contraction, also can more effectively reduce negative lug 1 and positive pole ear 6 and corresponding negative electrode tab 3 and 2 edge of positive plate are short
The risk connect can also reduce the wind that the Li dendrite near negative lug 1 and positive pole ear 6 is shorted negative electrode tab 3 and positive plate 2
It is dangerous, the first film 7 is provided on positive pole ear 6.
Working principle: in use, first placing the negative electrode tab 3 of a regulatory specifications size, one layer of predetermined size is successively stacked
Isolation film 5, then stack a positive plate 2, stack the regulation number of plies repeatedly by 3 → isolation film of negative electrode tab, 5 → positive plate 2, it is outermost
Layer is negative electrode tab 3, the first film 7 being arranged on positive pole ear 6 and the second film 12 being arranged in negative lug 1, prevents battery
By heating 140 DEG C or so and aluminum plastic film hot-melting sealed when short circuit occurs when encapsulation between metal tape and aluminum plastic film, and encapsulating
Being bonded together prevents leakage, and when stacking positive plate 2,2 top edge of positive plate and 3 top edge of negative electrode tab distance are A, positive plate 2
Lower edge and 3 lower edge of negative electrode tab distance are A-0.5 ~ 1.5mm=B, because top margin is (i.e. on 2 top edge of positive plate and negative electrode tab 3
Edge) have and widens, isolation film 5 can more effectively clad anode piece 2, negative lug 1 and positive pole ear 6, isolation film 5 be welded in Tab
Or have certain contraction after baking, it also can more effectively reduce negative lug 1 and positive pole ear 6 and corresponding negative electrode tab 3 and just
The risk that 2 edge of pole piece is shorted can also reduce Li dendrite near negative lug 1 and positive pole ear 6 and be shorted negative electrode tab 3 and just
The risk of pole piece 2.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (6)
1. a kind of lamination for promoting battery core safety, including negative lug (1), lamination main body (4), isolation film (5) and second
Locating slot (10), it is characterised in that: one end of the lamination main body (4) is provided with negative electrode tab (3), and negative electrode tab (3) top
Side is provided with negative lug (1), is provided with the second film (12) on the negative lug (1), one end of the negative electrode tab (3)
It is evenly arranged with the second locating piece (11), one end of the negative electrode tab (3) is provided with isolation film (5), and isolation film (5) is close to negative
One end of pole piece (3) is evenly arranged with and mutually matched second locating slot (10) of the second locating piece (11), the isolation film (5)
Be internally provided with anti-corrosion layer (14), the isolation film (5) is provided with positive plate (2) far from the one end of negative electrode tab (3), and just
The other side on pole piece (2) top is provided with positive pole ear (6), is provided with the first film (7) on the positive pole ear (6).
2. a kind of lamination for promoting battery core safety according to claim 1, it is characterised in that: the positive plate (2)
With the distance of negative electrode tab (3) top edge than positive plate (2) and the lower edge of negative electrode tab (3) apart from big 0.5-15mm.
3. a kind of lamination for promoting battery core safety according to claim 1, it is characterised in that: the negative electrode tab (3),
The surface area of isolation film (5) and positive plate (2) successively reduces.
4. a kind of lamination for promoting battery core safety according to claim 1, it is characterised in that: the isolation film (5)
Surface be provided with insulating layer (13).
5. a kind of lamination for promoting battery core safety according to claim 1, it is characterised in that: the isolation film (5)
Inside be uniformly arranged hole (15), and hole (15) is equally arranged in the inside of isolation film (5).
6. a kind of lamination for promoting battery core safety according to claim 1, it is characterised in that: the isolation film (5)
It is evenly arranged with the first locating slot (9) on the isolation film (5) of one end far from negative electrode tab (3), the positive plate (2) is close to isolation
One end of film (5) is evenly arranged with and mutually matched first locating piece (8) of the first locating slot (9), first locating piece (8)
And first be snap-in structure between locating slot (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920061788.5U CN209298283U (en) | 2019-01-15 | 2019-01-15 | A kind of lamination promoting battery core safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920061788.5U CN209298283U (en) | 2019-01-15 | 2019-01-15 | A kind of lamination promoting battery core safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209298283U true CN209298283U (en) | 2019-08-23 |
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ID=67642115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920061788.5U Expired - Fee Related CN209298283U (en) | 2019-01-15 | 2019-01-15 | A kind of lamination promoting battery core safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209298283U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490298A (en) * | 2020-04-23 | 2020-08-04 | 宜春清陶能源科技有限公司 | Laminated soft package battery |
| CN113725496A (en) * | 2021-09-01 | 2021-11-30 | 骆驼集团新能源电池有限公司 | Ternary system start-stop lithium ion battery and preparation method thereof |
| CN114039103A (en) * | 2021-10-26 | 2022-02-11 | 三一技术装备有限公司 | Production method and production device of winding battery cell |
| CN114497749A (en) * | 2022-02-11 | 2022-05-13 | 上海兰钧新能源科技有限公司 | Laminated cell structure and laminated battery |
-
2019
- 2019-01-15 CN CN201920061788.5U patent/CN209298283U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490298A (en) * | 2020-04-23 | 2020-08-04 | 宜春清陶能源科技有限公司 | Laminated soft package battery |
| CN113725496A (en) * | 2021-09-01 | 2021-11-30 | 骆驼集团新能源电池有限公司 | Ternary system start-stop lithium ion battery and preparation method thereof |
| CN113725496B (en) * | 2021-09-01 | 2024-04-19 | 骆驼集团新能源电池有限公司 | Ternary system start-stop lithium ion battery and preparation method thereof |
| CN114039103A (en) * | 2021-10-26 | 2022-02-11 | 三一技术装备有限公司 | Production method and production device of winding battery cell |
| CN114039103B (en) * | 2021-10-26 | 2023-09-08 | 三一技术装备有限公司 | Production method and production device of winding battery core |
| CN114497749A (en) * | 2022-02-11 | 2022-05-13 | 上海兰钧新能源科技有限公司 | Laminated cell structure and laminated battery |
| CN114497749B (en) * | 2022-02-11 | 2024-01-19 | 上海兰钧新能源科技有限公司 | Lamination cell structure and lamination battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211202 Address after: 313000 building 6-7, No. 666, tunheng Road, Nanxun Town, Nanxun District, Huzhou City, Zhejiang Province Patentee after: HUZHOU XINYUAN BATTERY SYSTEM TECHNOLOGY Co.,Ltd. Address before: 526000 No. 18, Yingbin Avenue, high tech Zone, Zhaoqing City, Guangdong Province Patentee before: ZHAOQING AOYOU POWER BATTERY CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190823 Termination date: 20220115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |