CN107394277A - A kind of core strueture for improving battery core acupuncture, impacting security performance - Google Patents
A kind of core strueture for improving battery core acupuncture, impacting security performance Download PDFInfo
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- CN107394277A CN107394277A CN201710616015.4A CN201710616015A CN107394277A CN 107394277 A CN107394277 A CN 107394277A CN 201710616015 A CN201710616015 A CN 201710616015A CN 107394277 A CN107394277 A CN 107394277A
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- barrier film
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- strueture
- battery core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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 invention discloses a kind of core strueture for improving battery core acupuncture, impacting security performance, can freely adjust the own membrane configuration of increase, membrane configuration design diversification variation according to the product of different demands for security；Different layers interval film thickness can unrestricted choice；Diaphragm length can unrestricted choice can according to current production safety, failure ratio carries out flexible barrier film adjustment or increase with degree, the high-energy-density product of high safety is obtained while electrical property is not damaged, easily realized on engineer applied, do not increase technology difficulty, energy density substantially reduces acupuncture temperature elevation amplitude, significantly improves battery core security performance while can preferably keeping.
Description
Technical field
The present invention relates to field of batteries, more particularly to a kind of core strueture for improving battery core acupuncture, impacting security performance.
Background technology
Nowadays lithium ion battery on electric tool use explosive growth, electrokinetic cell cost, production efficiency and
Long term life and uniformity urgently rapidly break through, so the research to battery module structure is the most important thing.Lithium battery at present
Safety in utilization is always the emphasis of research and development in industry, and current core strueture is mostly stacked, winding or Z-shaped structure no matter
Which kind of structure, its basic interfacial structure be all negative pole, barrier film, positive pole alternately uniformly, systematicness distribution structure setting, this
Certain hidden danger be present in security performance when kind structure is in practice for acupuncture, extruding, impact non-normal use.Especially because work as
Preceding chasing for energy density, the requirement more and more higher for product structure design, the thickness of barrier film use more and more thinner, from
12 μm of base materials are stepped down to existing 5 μ m-thick base material, and barrier film base material is thinner, and the security of barrier film will reduce.
How existing core strueture is improved, the application to be got both with abundant equilibrium product energy density with security
Effect needs the solution in a kind of new structure.
The content of the invention
Goal of the invention：In order to solve problems of the prior art, it is an object of the invention to provide a kind of flexible structure,
On the premise of not damaging electrical property and energy density, general warranty battery core security performance under conditions of reply different application demand
Improve battery core acupuncture, impact the core strueture of security performance.
Technical scheme：The present invention proposes a kind of following technical scheme：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be one in the core strueture at or
Many places increase one or more layers newly-increased barrier film and stack to form the multiple thin battery core stacked structures for meeting current production demand.
In order to meet the needs of different product is to core strueture security performance, the newly-increased diaphragm design is diversification, more
The structure of sample.
Further, the newly-increased barrier film difference layer thickness unrestricted choice.
It is more highly preferred to, the core strueture is one kind in Z-shaped lamination, stacking-foldable structure, winding-structure.
In some embodiments, when the core strueture is Z-shaped lamination, the newly-increased barrier film is arranged at positive pole pole
Between piece and original barrier film or it is arranged between cathode pole piece and original barrier film.
In some embodiments, when the core strueture is stacking-foldable structure, the newly-increased barrier film is arranged at arbitrarily
Between two stackable units or after last stackable unit.
In some embodiments, when the core strueture is winding-structure, the newly-increased barrier film is arranged at before winding most
Outer layer anode pole piece outer layer, the newly-increased diaphragm length flexibly select.
Beneficial effect：Compared with prior art, the present invention has advantages below：Can be according to the production of different demands for security
Product, freely adjust the own membrane configuration of increase, membrane configuration design diversification variation；Different layers interval film thickness can be selected freely
Select；Diaphragm length can unrestricted choice flexible barrier film adjustment or increasing can be carried out with degree according to current production safety, failure ratio
Add, the high-energy-density product of high safety is obtained while electrical property is not damaged, easily realizes, does not increase on engineer applied
Technology difficulty, energy density substantially reduce acupuncture temperature elevation amplitude, significantly improve battery core peace while can preferably keeping
Full performance.
Brief description of the drawings
Fig. 1 is the structural representation before the adjustment of Z-shaped lamination in embodiment 1；
Fig. 2 is the structural representation after the adjustment of Z-shaped lamination in embodiment 1；
Fig. 3 is the structural representation after the adjustment of Z-shaped lamination in embodiment 2；
Fig. 4 is the structural representation after the adjustment of Z-shaped lamination in embodiment 3；
Fig. 5 is the structural representation before stacking in embodiment 4-preceding folding of foldable structure adjustment；
Fig. 6 is the structural representation after stacking in embodiment 4-preceding folding of foldable structure adjustment；
Fig. 7 is the structural representation before folding after stacking in embodiment 4-foldable structure adjustment；
Fig. 8 is the structural representation after folding after stacking in embodiment 4-foldable structure adjustment；
Fig. 9 is the structural representation before being folded in embodiment 5 after stacking-foldable structure structural adjustment；
Figure 10 is the structural representation after being folded in embodiment 5 after stacking-foldable structure structural adjustment；
Figure 11 is the structural representation before being folded in embodiment 6 after stacking-foldable structure structural adjustment；
Figure 12 is the structural representation after being folded in embodiment 6 after stacking-foldable structure structural adjustment；
Figure 13 is the structural representation before being folded in embodiment 7 after stacking-foldable structure structural adjustment；
Figure 14 is the structural representation after being folded in embodiment 8 after stacking-foldable structure structural adjustment；
Figure 15 is the structural representation before being wound in embodiment 9 before winding-structure adjustment；
Figure 16 is the structural representation after being wound in embodiment 9 before winding-structure adjustment；
Figure 17 is the structural representation before being wound in embodiment 9 after winding-structure adjustment；
Figure 18 is the structural representation before being wound in embodiment 10 after winding-structure adjustment；
Figure 19 is that Z-shaped lamination battery core carries out acupuncture schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
The present invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are each to the present invention's
The modification of the kind equivalent form of value falls within the application appended claims limited range.
Embodiment 1：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be one in the core strueture at increase
One layer of newly-increased barrier film is added to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is Z-shaped lamination, refer to Fig. 1, for the core strueture schematic diagram before adjustment, by barrier film with Z
Font structure is every being wound between anode pole piece and cathode pole piece；The core strueture of formation for be followed successively by from top to bottom barrier film/negative pole/
Barrier film/positive pole/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/barrier film/positive pole/barrier film/negative
Pole/barrier film.
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, in second negative pole from top to bottom
One layer of newly-increased barrier film 1 is set between pole piece and second anode pole piece, and the newly-increased barrier film 1 is with original barrier film with Z-type connection side
Formula is connected as an overall barrier film；As shown in Fig. 2 new core strueture is from top to bottom：Barrier film/negative pole/barrier film/positive pole/every
Film/negative pole/barrier film/barrier film/positive pole/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/every
Film.
Embodiment 2：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be one in the core strueture at increase
One layer of newly-increased barrier film is added to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is Z-shaped lamination, and the core strueture before adjustment is identical with structure in embodiment 1, refer to figure
1。
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, in third layer barrier film from top to bottom
One layer of newly-increased barrier film 1 is set between second cathode pole piece, and the newly-increased barrier film 1 be arranged in parallel and adjacent original barrier film；
As shown in figure 3, new core strueture is from top to bottom：Barrier film/negative pole/barrier film/positive pole/barrier film/barrier film/negative pole/barrier film/just
Pole/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/barrier film.
Embodiment 3：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture is two punishment in the core strueture
Not Zeng Jia by one layer of newly-increased barrier film stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is Z-shaped lamination, and the core strueture before adjustment is identical with structure in embodiment 1, refer to figure
1。
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, in third layer barrier film from top to bottom
One layer of newly-increased barrier film 1 is set between second cathode pole piece, from bottom to up between second cathode pole piece and the 4th layer of barrier film
One layer of newly-increased barrier film 1 is set, and the newly-increased barrier film 1 be arranged in parallel and adjacent original barrier film；As shown in figure 4, new battery core knot
Structure is from top to bottom：Barrier film/negative pole/barrier film/positive pole/barrier film/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/barrier film/just
Pole/barrier film/barrier film/negative pole/barrier film/positive pole/barrier film/negative pole/barrier film.
It is can be seen that from embodiment 1-3 when core strueture is Z-shaped lamination, can be arbitrarily according to current production need
Ask, diversification diverse designs are carried out to newly-increased barrier film, can increase at one, can also increase simultaneously in many places, to reach energy
The optimization of density and security performance balances.
Embodiment 4:
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be one in the core strueture at increase
One layer of newly-increased barrier film is added to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is stacking-foldable structure, specifically by a construction unit 1 and seven construction units 2 52 with
One continuous barrier film 53 carries out folding for carrier and formed, and refer to Fig. 5, schematic diagram before being folded for the core strueture before adjustment, institute
It is single cathode pole piece structure to state construction unit 1, and the construction unit two is the structure of positive pole/barrier film/negative pole；With continuous
Barrier film 53 be carrier folded after as shown in fig. 6, folding latter two adjacent construction unit between have one layer of continuous barrier film.
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, in the He of construction unit 1
Newly-increased barrier film 1 is set between the adjacent construction unit 2 52, and the newly-increased barrier film 1 is connected as with original continuous barrier film 53
One overall barrier film；Fig. 7 is refer to, it is as shown in Figure 8 for schematic diagram before the core strueture folding after adjustment, folded configuration：Folding
It is two layers of barrier film between the construction unit two adjacent with top of construction unit 1 described in poststack, including one layer of newly-increased He of barrier film 1
Original continuous barrier film.
Embodiment 5：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be one in the core strueture at increase
One layer of newly-increased barrier film is added to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is stacking-foldable structure, and the core strueture before adjustment is same as Example 4, refer to Fig. 5 and figure
6。
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, in first construction unit
Newly-increased barrier film 1 is set between 2 52 and its adjacent construction unit 2 52, and the newly-increased barrier film 1 connects with original continuous barrier film 53
It is connected in an overall barrier film；Fig. 9 is refer to, schematic diagram before being folded for the core strueture after adjustment, folded configuration such as Figure 10 institutes
Show：Be two layers of barrier film between the construction unit 1 construction unit two adjacent with lower section after folding, including one layer it is newly-increased every
Film 1 and original continuous barrier film.
Embodiment 6：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be in the core strueture two everywhere
Increase by one layer of newly-increased barrier film respectively to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is stacking-foldable structure, and the core strueture before adjustment is same as Example 4, refer to Fig. 5 and figure
6。
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, in the He of construction unit 1
Newly-increased barrier film 1 is set between the adjacent construction unit 2 52, and set after last described construction unit 2 52
Newly-increased barrier film 1, the newly-increased barrier film 1 are connected as an overall barrier film with original continuous barrier film 53；Figure 11 is refer to, for adjustment
Schematic diagram before core strueture afterwards folds, folded configuration are as shown in figure 12：The construction unit 1 and top phase after folding
It is two layers of barrier film between adjacent construction unit two, including one layer of newly-increased barrier film 1 and original continuous barrier film；Bottom after folding
The lower section of construction unit 2 52 is two layers of barrier film, including one layer of newly-increased barrier film 1 and original continuous barrier film.
Embodiment 7：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be in the core strueture three everywhere
Increase by one layer of newly-increased barrier film respectively to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is stacking-foldable structure, and the core strueture before adjustment is same as Example 4, refer to Fig. 5 and figure
6。
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, sets increase barrier film at three newly altogether,
One sets newly-increased barrier film 1 between first construction unit 2 52 and its adjacent construction unit 2 52, secondly the
Newly-increased barrier film 1 is set between four construction units 2 52 and the 5th construction unit 2 52, thirdly in last structure
Newly-increased barrier film 1 is set after unit 2 52, and the newly-increased barrier film 1 is connected as an overall barrier film with original continuous barrier film 53；
Figure 13 is refer to, it is as shown in figure 14 for schematic diagram before the core strueture folding after adjustment, folded configuration：The structure after folding
It is two layers of barrier film between the construction unit 2 52 adjacent with top of unit 1, including one layer of newly-increased barrier film 1 and original continuous
Barrier film；It is from top to bottom two layers of barrier film between first construction unit 2 52 and construction unit 2 52 adjacent below,
Including one layer of newly-increased barrier film 1 and original continuous barrier film, the lower section of the construction unit 2 52 of bottom is two layers of barrier film, including
One layer of newly-increased barrier film 1 and original continuous barrier film.
It is can be seen that from embodiment 4-7 when core strueture is stacking-foldable structure, can also be arbitrarily according to current production
Product demand, diversification diverse designs are carried out to newly-increased barrier film, can increase at one, can also increase simultaneously in many places, to reach
The optimization of energy density and security performance balances.
Embodiment 8：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be one in the core strueture at increase
One layer of newly-increased barrier film is added to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is winding-structure, including sheet type anode pole piece 81, continuous barrier film 83, sheet type cathode pole piece 82
And it is wound after the continuous stacking of barrier film 83 and carrys out Formation cross-section for circular or ellipse coiled battery structure；Rolled up before adjustment
As shown in figure 14 around preceding core strueture, the structural representation after winding is as shown in figure 15.
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, the superiors' sheet type in stacking
The top of anode pole piece 81 increases a newly-increased barrier film 1 newly, and the structural representation before winding is as shown in figure 16, after winding, this it is newly-increased every
Film increases one layer of barrier film (not shown) newly in circular or ellipsoidal structure winding layer corresponding position.
Embodiment 9：
A kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film group
Into battery core, specially adjustable type core strueture, the adjustable type core strueture be one in the core strueture at increase
One layer of newly-increased barrier film is added to stack to form the multiple thin battery core stacked structures for meeting current production demand.
The core strueture is winding-structure, and the core strueture before adjustment is same as Example 8, and the core strueture before winding is such as
Shown in Figure 16, the structural representation after winding is as shown in figure 17.
In order to improve battery core acupuncture, impact security performance, core strueture is adjusted, the superiors' sheet type in stacking
The top of anode pole piece 81 increases a newly-increased barrier film 1 newly, and the newly-increased barrier film 1 is longer compared with the accordingly newly-increased diaphragm length of embodiment 8, volume
As shown in figure 18 around preceding structural representation, after winding, the newly-increased barrier film is new in circular or ellipsoidal structure winding layer corresponding position
Increase one layer of barrier film (not shown).
From embodiment 8 and embodiment 9 as can be seen that when core strueture is winding-structure, also be able to can arbitrarily it adjust new
Increase length or the position of barrier film to adapt to the demand of current production, reach the optimization balance of energy density and security performance.
It is another to carry out a kind of front and rear progress pin prick test security performance test pair of adjustment of adjustable type core strueture of the present invention
Than：
Test model：Polymer battery core 605869,255869,405869
Core strueture：Z-type lamination
Model feature：Length and width are consistent, and battery core thickness difference is inconsistent, and its model specification is as shown in table 1：
Table 1：Test battery core specification
Using unitary variant method：Electrode slice is used with a collection of, surface density, to roll the consistent design of thickness, electrolyte,
Aluminum plastic film, barrier film producer and the trade mark, specification are consistent.
Acupuncture result is as shown in table 2：
Table 2：Acupuncture, extruding result before core strueture adjustment
From table 2 it can be seen that same system battery core, thickness is thicker, and acupuncture, extruding security are poorer；
Principle analysis：
1st, acupuncture syringe needle：5mm stainless pins
2nd, membrane performance：Puncture strength ＞ 300gf (possess certain punctured resistance)
As shown in figure 19, schematic diagram when being acupuncture, wherein it is barrier film stretching barrier positive pole when carrying out acupuncture to battery core to have figure
Pole piece and cathode pole piece, this layer of deformation quantity can be lifted more by increasing by one layer of barrier film, reduce short dot.
The improvement project of the present invention：
In the case where not changing existing system and raw material, carry out more folded barrier films, be equivalent to thick battery core is separated into it is several
Individual thin battery core, carries out lancing test in the case.
Tested after increasing by one layer of newly-increased barrier film to polymer battery core 465869 respectively, and to polymer battery core 605869
Increase respectively 1 layer, 2 layers, carry out corresponding acupuncture and extruding test, contrast test result, such as the institute of table 2 after 3 layers of newly-increased barrier film
Show：
Table 3：Acupuncture, extruding result after core strueture adjustment
As can be seen from Table 3：Increase barrier film to stack, battery core is separated, is equivalent to the overlapping of thin battery core, acupuncture temperature rise is obvious
Reduce, security is significantly improved, and does not increase technology difficulty, and thickness is slightly increased, and energy density can preferably be kept.
Indicated above, a kind of core strueture for improving battery core acupuncture, impacting security performance of the present invention can be according to not Tongan City
The product of full demand, freely adjust the own membrane configuration of increase, membrane configuration design diversification variation；Different layers interval thickness
Degree can unrestricted choice；Diaphragm length can unrestricted choice can according to current production safety, failure ratio with degree carry out flexibly every
Film adjusts or increase, the high-energy-density product of high safety is obtained while electrical property is not damaged, on engineer applied easily
Realize, do not increase technology difficulty, energy density substantially reduces acupuncture temperature elevation amplitude, significantly while can preferably keeping
Improve battery core security performance.
Claims (7)
1. a kind of core strueture for improving battery core acupuncture, impacting security performance, including anode pole piece, cathode pole piece and barrier film form
Battery core, it is characterised in that be adjustable type core strueture, the adjustable type core strueture is one in the core strueture
Place or many places increase one or more layers newly-increased barrier film and stack to form the multiple thin battery core stacked structures for meeting current production demand.
2. the core strueture according to claim 1 for proposing battery core acupuncture, impacting security performance, it is characterised in that：It is described new
Increasing diaphragm design is diversification, diversified structure.
3. the core strueture according to claim 2 for improving battery core acupuncture, impacting security performance, it is characterised in that：It is described
Newly-increased barrier film difference layer thickness unrestricted choice.
4. the core strueture according to claim 1 for improving battery core acupuncture, impacting security performance, it is characterised in that：It is described
Core strueture is one kind in Z-shaped lamination, stacking-foldable structure, winding-structure.
5. the core strueture according to claim 4 for improving battery core acupuncture, impacting security performance, it is characterised in that：It is described
When core strueture is Z-shaped lamination, the newly-increased barrier film is arranged between anode pole piece and original barrier film or is arranged at negative
Between pole pole piece and original barrier film.
6. the core strueture according to claim 4 for improving battery core acupuncture, impacting security performance, it is characterised in that：It is described
When core strueture is stacking-foldable structure, the newly-increased barrier film is arranged between any two stackable unit or last heap
After folded unit.
7. the core strueture according to claim 4 for improving battery core acupuncture, impacting security performance, it is characterised in that：It is described
When core strueture is winding-structure, the newly-increased barrier film is arranged at outermost layer anode pole piece outer layer before winding, the newly-increased barrier film
Length-flexible selects.
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| CN112038707A (en) * | 2020-10-10 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Battery cell and preparation method thereof |
| CN113707946A (en) * | 2021-08-27 | 2021-11-26 | 远景动力技术(江苏)有限公司 | Laminated battery cell and section packaging method thereof |
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| CN1805205A (en) * | 2005-01-14 | 2006-07-19 | 比亚迪股份有限公司 | Electrode plate core of lithium ion cell and lithium ion cell with the same |
| CN2798320Y (en) * | 2005-04-18 | 2006-07-19 | 比亚迪股份有限公司 | Electrode core for basic secondary battery and basic secondary battery containing same electrode core |
| CN201853756U (en) * | 2010-07-23 | 2011-06-01 | 松下能源(无锡)有限公司 | Battery diaphragm and battery |
| CN202231114U (en) * | 2011-08-27 | 2012-05-23 | 安徽金能锂电股份有限公司 | Ultrathin novel polymer lithium ion battery |
| CN205621805U (en) * | 2016-04-29 | 2016-10-05 | 东莞市泽源机械有限公司 | Semi -automatic circular winder |
| CN207409608U (en) * | 2017-07-26 | 2018-05-25 | 力信（江苏）能源科技有限责任公司 | It is a kind of to improve battery core pin thorn, the core strueture of impact security performance |
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| CN112038707A (en) * | 2020-10-10 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Battery cell and preparation method thereof |
| CN112038707B (en) * | 2020-10-10 | 2021-06-22 | 合肥国轩高科动力能源有限公司 | Battery cell and preparation method thereof |
| CN113707946A (en) * | 2021-08-27 | 2021-11-26 | 远景动力技术(江苏)有限公司 | Laminated battery cell and section packaging method thereof |
| CN113707946B (en) * | 2021-08-27 | 2023-09-01 | 远景动力技术(江苏)有限公司 | Laminated battery core and section packaging method thereof |
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