CN206711983U - Battery core - Google Patents
Battery core Download PDFInfo
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- CN206711983U CN206711983U CN201720087010.2U CN201720087010U CN206711983U CN 206711983 U CN206711983 U CN 206711983U CN 201720087010 U CN201720087010 U CN 201720087010U CN 206711983 U CN206711983 U CN 206711983U
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- Prior art keywords
- battery core
- layer
- liquid
- adsorption layer
- pole piece
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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
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Abstract
The utility model discloses a kind of battery core, it includes the pole piece group that positive plate, negative plate, the barrier film that is interval between positive plate and negative plate are wound into, and the lug being arranged in pole piece group, wherein, the center of pole piece group is provided with liquid-adsorption layer, and liquid-adsorption layer is provided with groove corresponding with lug.Relative to prior art, the utility model battery core is provided with groove corresponding with lug shape and size by the centrally disposed liquid-adsorption layer in pole piece group, liquid-adsorption layer, and lug is correspondingly placed in groove, the inner space of battery core can be rationally utilized, plays a part of smooth battery core, improve battery core outward appearance.In addition, liquid-adsorption layer is adsorbable and stores the electrolyte that battery core prepares injection at initial stage, electrolyte can be slowly discharged by expansion extruding in cyclic process, the consumption of electrolyte during replenishment cycles, extend the cycle life of battery core.
Description
Technical field
The utility model belongs to field of batteries, and more specifically, the utility model is related to one kind has the Ideal Cycle life-span
Battery core.
Background technology
With the development of polymer Li-ion battery, market is used for the requirement more and more higher in life-span.Lithium-ion electric core
Electrolyte can be gradually used up with the use of battery core, influence the service life of battery core.It is existing in order to extend the service life of battery core
There is technology to propose and reserve excessive electrolyte at the initial stage for preparing battery core.But excessive electrolyte can cause partial electrolyte
Liquid is free to be present, and is caused the actual (real) thickness of battery to exceed design thickness and is influenceed its outward appearance.
In view of this, it is necessory to provide a kind of battery core with Ideal Cycle life-span and flat configuration.
Utility model content
The purpose of this utility model is：Overcome the deficiencies in the prior art, there is provided one kind has Ideal Cycle life-span peace
The battery core of whole structure.
In order to realize above-mentioned purpose of utility model, the utility model provides a kind of battery core, and it includes positive plate, negative pole
The pole piece group that piece, the barrier film being interval between positive plate and negative plate are wound into, and the lug being arranged in pole piece group, its
In, the center of pole piece group is provided with liquid-adsorption layer, and liquid-adsorption layer is provided with groove corresponding with lug.
One kind as the utility model battery core is improved, and the liquid-adsorption layer has more microporous polymer skeleton structures.
As the utility model battery core one kind improve, the liquid-adsorption layer include stack gradually upper outer layer, internal layer and under
Outer layer.
One kind as the utility model battery core is improved, and the upper outer layer and the lower outer layer are provided with several micropores,
The internal layer is provided with several through holes.The setting of micropore and through hole so that electrolyte can pass through.
One kind as the utility model battery core is improved, and the micropore size is 0.02~0.6 μm.
One kind as the utility model battery core is improved, and the through-hole aperture is 0.5~3 μm.
One kind as the utility model battery core is improved, and the upper outer layer and the lower outer layer are non-woven polyester layer of cloth or gathered
Propylene layer.
As the utility model battery core one kind improve, the internal layer be PPSU paraphenylene terephthalamide amine layer, polyethylene layer,
Gel polymer layer or vinylidene fluoride-hexafluoropropylene copolymer layer.
One kind as the utility model battery core is improved, and the thickness of the upper outer layer and the lower outer layer is 10~70 μm.
One kind as the utility model battery core is improved, and the internal layer thickness is 20~100 μm.
Relative to prior art, the utility model battery core in the centrally disposed liquid-adsorption layer of pole piece group, liquid-adsorption layer by being provided with
Groove corresponding with lug shape and size, lug can be corresponded to and be placed in groove.It is arranged such, can rationally utilizes battery core
Inner space, play a part of smooth battery core, improve outward appearance.In addition, liquid-adsorption layer is adsorbable and stores battery core preparation injection at initial stage
Electrolyte, can slowly be discharged electrolyte by expansion extruding in cyclic process, electrolyte disappears during replenishment cycles
Consumption, extend the cycle life of battery core.
Brief description of the drawings
With reference to the accompanying drawings and detailed description, the utility model battery core and its technique effect are described in detail.
Fig. 1 is the structural representation of the utility model battery core.
Fig. 2 is the schematic diagram of liquid-adsorption layer in the utility model battery core.
Fig. 3 is the sectional view of liquid-adsorption layer in the utility model battery core.
Fig. 4 is the cycle performance comparison diagram of the utility model battery core and the existing battery core for being not provided with liquid-adsorption layer.
Description of reference numerals：
10- liquid-adsorption layers；20- pole piece groups；100th, 102- grooves；The upper outer layers of 104-；106- internal layers；Outer layer under 108-；200、
202- lugs.
Embodiment
In order that the purpose of this utility model, technical scheme and advantageous effects become apparent from, below in conjunction with accompanying drawing and
Embodiment, the utility model is further elaborated.It should be appreciated that the embodiment described in this specification is only
Merely to explaining the utility model, it is not intended to limit the utility model.
Refer to shown in Fig. 1 and Fig. 2, the utility model battery core includes positive plate, negative plate, is interval in positive plate and negative pole
The pole piece group 20 that barrier film between piece is wound into, and the lug 200,202 being arranged in pole piece group 20, wherein, pole piece group
20 center is provided with liquid-adsorption layer 10, and liquid-adsorption layer 10 is provided with lug 200, groove 100,102 corresponding to 202.
In the shown embodiment, liquid-adsorption layer 10 is laid in the center of pole piece group 20, i.e. pole piece group 20 starts the pole of winding
On piece.Liquid-adsorption layer 10 is provided with two spaced grooves 100,102, two lugs 200,202 set in pole piece group 20
It can correspond to and be contained in groove 100,102.It is arranged such, not only can rationally utilizes the inner space of battery core, can also play
Smooth battery core and the effect for improving battery core outward appearance.
It refer to shown in Fig. 2 and Fig. 3, according to an embodiment of the present utility model, liquid-adsorption layer 10 includes stacking gradually
Upper outer layer 104, internal layer 106 and lower outer layer 108, upper outer layer 104 and lower outer layer 108 are by polyester non-woven fabric or polypropylene material system
Into thickness is 10~70 μm.Upper outer layer 104 and lower outer layer 108 have several micropores, and micropore size is 0.02~0.6 μm.It is interior
Layer 106 is by PPSU terephthalamide, polyethylene, gel polymer or vinylidene fluoride-hexafluoropropylene copolymer material system
Into thickness is 20~100 μm.Internal layer has several through holes, and through-hole aperture is 0.5~3 μm.
In the embodiment shown in Fig. 2 and Fig. 3, liquid-adsorption layer 10 is provided with three-decker and has certain thickness, and inhales
Liquid layer 10 is provided with micropore and through hole, the electrolyte that battery core prepares injection at initial stage can be fully adsorbed and store, in cyclic process
Extruded by expansion and slowly discharge electrolyte, the consumption of electrolyte during replenishment cycles, extend the cycle life of battery core.
Performance test
The utility model battery core and the existing battery core for being not provided with liquid-adsorption layer are subjected to 1C/1C charge and discharge cycles surveys at 25 DEG C
Examination, and the capability retention and expansion rate of battery core are tested respectively, test result is as shown in Figure 4.Can be with from Fig. 4 comparing result
Find out, relative to the existing battery core for being not provided with liquid-adsorption layer, the utility model battery core has preferable cycle life, in circulation 600
After secondary, capability retention still can reach about 90%, and expansion rate is also significantly better than the battery core for being not provided with liquid-adsorption layer.
The embodiment and contrast test of the utility model battery core can be seen that relative to prior art with reference to more than,
The utility model battery core has advantages below：
The centrally disposed liquid-adsorption layer 10 of pole piece group 20, liquid-adsorption layer 10 are provided with corresponding with the shape and size of lug 200,202
Groove 100,102, lug 200,202 can correspond to be placed in groove 100,102.It is arranged such, can rationally utilizes battery core
Inner space, play a part of smooth battery core, improve battery core outward appearance.In addition, liquid-adsorption layer 10 is adsorbable and stores battery core preparation
The electrolyte of injection at initial stage, it can slowly be discharged electrolyte by expansion extruding in cyclic process, electricity during replenishment cycles
The consumption of liquid is solved, extends the cycle life of battery core.
The announcement and teaching of book according to the above description, the utility model those skilled in the art can also be to above-mentioned realities
The mode of applying carries out appropriate change and modification.Therefore, the utility model is not limited to specific implementation disclosed and described above
Mode, some modifications and changes of the present utility model should also be as falling into scope of the claims of the present utility model.
In addition, although used some specific terms in this specification, but these terms are merely for convenience of description, not to this reality
With new composition any restrictions.
Claims (10)
1. a kind of battery core, including the pole piece that positive plate, negative plate, the barrier film that is interval between positive plate and negative plate are wound into
Group, and the lug being arranged in pole piece group, it is characterised in that the center of pole piece group is provided with liquid-adsorption layer, and liquid-adsorption layer is provided with and pole
Groove corresponding to ear.
2. battery core according to claim 1, it is characterised in that the liquid-adsorption layer has more microporous polymer skeleton structures.
3. battery core according to claim 2, it is characterised in that the liquid-adsorption layer includes upper outer layer, the internal layer stacked gradually
With lower outer layer.
4. battery core according to claim 3, it is characterised in that it is micro- that the upper outer layer and the lower outer layer are provided with several
Hole, the internal layer are provided with several through holes.
5. battery core according to claim 4, it is characterised in that the micropore size is 0.02~0.6 μm.
6. battery core according to claim 4, it is characterised in that the through-hole aperture is 0.5~3 μm.
7. battery core according to claim 3, it is characterised in that the upper outer layer and the lower outer layer are non-woven polyester layer of cloth
Or polypropylene layer.
8. battery core according to claim 3, it is characterised in that the internal layer is PPSU paraphenylene terephthalamide amine layer, poly- second
Alkene layer, gel polymer layer or vinylidene fluoride-hexafluoropropylene copolymer layer.
9. battery core according to claim 3, it is characterised in that the thickness of the upper outer layer and the lower outer layer is 10~70
μm。
10. battery core according to claim 3, it is characterised in that the internal layer thickness is 20~100 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720087010.2U CN206711983U (en) | 2017-01-23 | 2017-01-23 | Battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720087010.2U CN206711983U (en) | 2017-01-23 | 2017-01-23 | Battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206711983U true CN206711983U (en) | 2017-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720087010.2U Active CN206711983U (en) | 2017-01-23 | 2017-01-23 | Battery core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416632A (en) * | 2019-06-20 | 2019-11-05 | 合肥国轩高科动力能源有限公司 | A method of improving electrodes of lithium-ion batteries wellability |
-
2017
- 2017-01-23 CN CN201720087010.2U patent/CN206711983U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416632A (en) * | 2019-06-20 | 2019-11-05 | 合肥国轩高科动力能源有限公司 | A method of improving electrodes of lithium-ion batteries wellability |
| CN110416632B (en) * | 2019-06-20 | 2022-03-11 | 合肥国轩高科动力能源有限公司 | Method for improving wettability of lithium ion battery pole piece |
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