CN205564871U - Anodal pole piece and winding - type batteries - Google Patents
Anodal pole piece and winding - type batteries Download PDFInfo
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- CN205564871U CN205564871U CN201620049059.4U CN201620049059U CN205564871U CN 205564871 U CN205564871 U CN 205564871U CN 201620049059 U CN201620049059 U CN 201620049059U CN 205564871 U CN205564871 U CN 205564871U
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- pole piece
- active material
- anode
- material layer
- battery core
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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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- 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
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Abstract
The utility model provides an anodal pole piece and winding - type batteries. Anodal pole piece is used for forming winding - type batteries with the negative pole pole piece, and it includes: the anodal mass flow body, and positive pole active material layer, the coating is on positive pole collection fluidic surface. Wherein, the anodal mass flow body possesses straight portion and the flexion that tangible becomes winding - type batteries, and the positive pole active material layer on the collection fluidic flexion anodal at least is equipped with the notch. In the basis the utility model discloses an among the anodal pole piece and winding - type batteries, the notch is effectual to have reduced positive pole active material layer's active material capacity on the flexion, and then improves winding - type batteries that anodal pole piece and negative pole pole piece formed in the CB of curvature value, prevents that curvature CB value is on the low side to lead to in the charging process emergence to analyse the lithium, through the size that changes the notch, can control winding - type batteries and in the CB of curvature value, make the CB value of curvature the same with the CB value of winding - type batteries design.
Description
Technical field
The utility model relates to field of batteries, particularly relates to a kind of anode pole piece and takeup type battery core.
Background technology
" takeup type structure " is one of two kinds of main core struetures that lithium ion battery is conventional, is characterized in that positive/negative plate leads to
Crossing winding method combination, advantage is that production efficiency is fast and production cost is low.
CB (Cell Balance) value is the active material capacity ratio with the active material capacity of positive pole of negative pole, if
CB value is less than normal than average design value, then secondary cell is susceptible to analyse lithium problem in charging process, and if CB value ratio is average
Design load is bigger than normal, then can cause the waste of negative material.With reference to Fig. 1, if only from structure, straight at plus plate current-collecting body 11
The length of the anode active material layer 12 inside portion 111 is equal to the negative active core-shell material outside negative current collector 21 corresponding thereto
The length of layer 22, so the CB value of this part is equal to average design value；And inside the bend 112 of plus plate current-collecting body 11 just
The length of pole active material layer 12, more than the length of the anode active material layer 22 outside negative current collector 21 corresponding thereto, is led
The CB value causing this part is less than normal than average design value, thus causes this part to be susceptible to analyse lithium problem in charging process.This
Have impact on performance and the quality of battery core, serious may also result in that battery core self discharge is big or short-circuit actual effect.
For ensureing that there are enough CB values the bend office of takeup type battery core B, the CB value by pole piece is overall is generally used to carry
The method of high (i.e. increasing the integral thickness of active material layer), but this not only can reduce battery core energy density, effect is also simultaneously
It not the most obvious.The bending area thickness of takeup type battery core B is the least, and its CB value is the least, also illustrate that and is simply increased by routine
The practice adding overall CB value can not be fully solved problem.
Utility model content
In view of problem present in background technology, the purpose of this utility model is to provide a kind of anode pole piece and takeup type
Battery core, it can control the takeup type battery core CB value at sweep, prevents that sweep CB value is on the low side to be caused in charging process
There is analysis lithium.
To achieve these goals, in first aspect, the utility model provides a kind of anode pole piece, is used for and negative pole pole
Sheet forms takeup type battery core, and anode pole piece includes: plus plate current-collecting body；And anode active material layer, it is coated in plus plate current-collecting body
Surface.Wherein, plus plate current-collecting body has straight portion and the bend of bend, at least plus plate current-collecting body forming takeup type battery core
On anode active material layer be provided with recess.
To achieve these goals, in second aspect, the utility model provides a kind of takeup type battery core, and it includes this reality
With the anode pole piece described in novel first aspect, and takeup type battery core also includes cathode pole piece.Cathode pole piece includes: negative pole currect collecting
Body；And anode active material layer, it is coated in the surface of negative current collector.Wherein, when forming takeup type battery core, cathode pole piece
The part forming jagged part facing with anode active material layer has anode active material layer.
The beneficial effects of the utility model are as follows:
According in anode pole piece of the present utility model, recess effectively reduces anode active material layer on bend
Active material capacity, and then the takeup type battery core that raising anode pole piece and cathode pole piece are formed is in the CB value of sweep, prevents
Sweep CB value is on the low side to be caused analysis lithium in charging process；By changing the size of recess, takeup type battery core can be controlled
In the CB value of sweep, the CB value making sweep is identical with the CB value that takeup type battery core designs.
According in takeup type battery core of the present utility model, the negative pole at the cathode pole piece of takeup type battery core sweep is lived
Property material layer with have jagged anode active material layer relative, recess effectively raises the CB of takeup type battery core sweep
Value, prevents sweep CB value on the low side causing from analysis lithium occurring in charging process；By changing the size of recess, winding can be controlled
Formula battery core is in the CB value of sweep, and the CB value making sweep is identical with the CB value that takeup type battery core designs.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the takeup type battery core of the anode pole piece formation of prior art；
Fig. 2 is the schematic diagram of an embodiment of the takeup type battery core formed according to anode pole piece of the present utility model；
Fig. 3 is the schematic diagram of another embodiment of the takeup type battery core formed according to anode pole piece of the present utility model.
Wherein, description of reference numerals is as follows:
B takeup type battery core 12 anode active material layer
1 anode pole piece N recess
11 plus plate current-collecting body 2 cathode pole pieces
111 straight portion 21 negative current collectors
112 bend 22 anode active material layer
Detailed description of the invention
Describe anode pole piece of the present utility model and takeup type battery core with reference to the accompanying drawings in detail.
First the anode pole piece of the utility model first aspect is described.
With reference to Fig. 2 and Fig. 3, according to anode pole piece 1 of the present utility model for forming takeup type battery core B with cathode pole piece 2,
Anode pole piece 1 includes: plus plate current-collecting body 11；And anode active material layer 12, it is coated in the surface of plus plate current-collecting body 11.Its
In, plus plate current-collecting body 11 has straight portion 111 and the bend 112, at least bending of plus plate current-collecting body 11 forming takeup type battery core B
Anode active material layer 12 in portion 112 is provided with recess N.
According in anode pole piece 1 of the present utility model, recess N effectively reduces positive-active material on bend 112
The active material capacity of the bed of material 12, and then improve the anode pole piece 1 takeup type battery core B with cathode pole piece 2 formation at sweep
CB value, prevent sweep CB value on the low side cause in charging process occur analysis lithium；By changing the size of recess N, can control
Takeup type battery core processed is in the CB value of sweep, and the CB value making sweep is identical with the CB value that takeup type battery core B designs.
According in anode pole piece 1 of the present utility model, with reference to Fig. 2 and Fig. 3, in one embodiment, only plus plate current-collecting body
Anode active material layer 12 on the bend 112 of 11 is provided with recess N.
According in anode pole piece 1 of the present utility model, in one embodiment, bend 112 He of plus plate current-collecting body 11
Anode active material layer 12 in straight portion 111 is equipped with recess N.According in anode pole piece 1 of the present utility model, with reference to Fig. 2
And Fig. 3, in one embodiment, takeup type battery core B outmost turns anode pole piece 1 plus plate current-collecting body 11 outside surface not
It is coated with anode active material layer 12." outside of plus plate current-collecting body 11 " refers to plus plate current-collecting body 11 and deviates from takeup type battery core B
The side at center.
According in anode pole piece 1 of the present utility model, reference Fig. 2, in one embodiment, only inside anode pole piece 1
Anode active material layer 12 is provided with recess N." inside anode pole piece 1 " refers to anode pole piece 1 towards takeup type battery core B center
Side.
According in anode pole piece 1 of the present utility model, reference Fig. 3, in one embodiment, inside and outside anode pole piece 1
Anode active material layer 12 on be equipped with recess N.
According in anode pole piece 1 of the present utility model, in one embodiment, anode active material layer 12 is burnt by physics
Knot, peel off or strike off mode and form recess N.
According in anode pole piece 1 of the present utility model, with reference to Fig. 2 and Fig. 3, in one embodiment, the degree of depth of recess N is little
Thickness in anode active material layer 12.If (i.e. the degree of depth of recess N is equal to positive pole to the through anode active material layer of recess N 12
The thickness of active material layer 12) and expose plus plate current-collecting body, may result in plus plate current-collecting body 11 and contact cathode pole piece 2 and cause volume
The serious short circuit of wound battery core B.
According in anode pole piece 1 of the present utility model, in one embodiment, on plus plate current-collecting body 11, intermittent application is just
Pole active material layer 12 is to form the plurality of recess N.The fine coating equipment that the short time can change coated weight can be used to exist
Plus plate current-collecting body 11 coating has the anode active material layer 12 of multiple recess N.
Secondly takeup type battery core B of the utility model second aspect is described.
With reference to Fig. 2 and Fig. 3, include described in the utility model first aspect according to takeup type battery core B of the present utility model
Anode pole piece 1, and takeup type battery core B also includes cathode pole piece 2.Cathode pole piece 2 includes: negative current collector 21；And negative pole is alive
Property material layer 22, is coated in the surface of negative current collector 21.Wherein, formed takeup type battery core B time, cathode pole piece 2 and positive pole
The part that active material layer 12 is formed with the part of recess N facing has anode active material layer 22.
According in takeup type battery core B of the present utility model, cathode pole piece 2 negative of takeup type battery core B sweep
Pole active material layer 22 is relative with the anode active material layer 12 with recess N, and recess N effectively raises takeup type battery core B
The CB value of sweep, prevents sweep CB value on the low side causing from analysis lithium occurring in charging process；By changing the big of recess N
Little, the takeup type battery core CB value at sweep can be controlled, make the CB value phase that the CB value of sweep designs with takeup type battery core B
With.
Claims (10)
1. an anode pole piece (1), for forming takeup type battery core (B) with cathode pole piece (2), anode pole piece (1) including:
Plus plate current-collecting body (11)；And
Anode active material layer (12), is coated in the surface of plus plate current-collecting body (11)；
It is characterized in that,
Plus plate current-collecting body (11) has straight portion (111) and bend (112), at least anode collection forming takeup type battery core (B)
Anode active material layer (12) on the bend (112) of body (11) is provided with recess (N).
Anode pole piece the most according to claim 1 (1), it is characterised in that the only bend (112) of plus plate current-collecting body (11)
On anode active material layer (12) be provided with recess (N).
Anode pole piece the most according to claim 1 (1), it is characterised in that the bend (112) of plus plate current-collecting body (11) and
Anode active material layer (12) in straight portion (111) is equipped with recess (N).
4. according to the anode pole piece (1) according to any one of claim 1-3, it is characterised in that at takeup type battery core (B) outermost
The surface in the outside of the plus plate current-collecting body (11) of the anode pole piece (1) of circle is not coated with anode active material layer (12).
Anode pole piece the most according to claim 1 (1), it is characterised in that the only positive-active material of anode pole piece (1) inner side
The bed of material (12) is provided with recess (N).
Anode pole piece the most according to claim 1 (1), it is characterised in that the positive-active inside and outside anode pole piece (1)
Recess (N) it is equipped with on material layer (12).
Anode pole piece the most according to claim 1 (1), it is characterised in that anode active material layer (12) is burnt by physics
Knot, peel off or strike off mode and form recess (N).
Anode pole piece the most according to claim 1 (1), it is characterised in that the degree of depth of recess (N) is less than positive electrode active materials
The thickness of layer (12).
Anode pole piece the most according to claim 1 (1), it is characterised in that in the upper intermittent application of plus plate current-collecting body (11) just
Pole active material layer (12) is to form multiple recess (N).
10. a takeup type battery core (B), including the anode pole piece (1) according to any one of claim 1-9, it is characterised in that
Described takeup type battery core (B) also includes cathode pole piece (2),
Cathode pole piece (2) including:
Negative current collector (21)；And
Anode active material layer (22), is coated in the surface of negative current collector (21)；
Wherein, formed takeup type battery core (B) time, cathode pole piece (2) be formed with recess (N) with anode active material layer (12)
The facing part of part has anode active material layer (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620049059.4U CN205564871U (en) | 2016-01-19 | 2016-01-19 | Anodal pole piece and winding - type batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620049059.4U CN205564871U (en) | 2016-01-19 | 2016-01-19 | Anodal pole piece and winding - type batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205564871U true CN205564871U (en) | 2016-09-07 |
Family
ID=56820157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620049059.4U Active CN205564871U (en) | 2016-01-19 | 2016-01-19 | Anodal pole piece and winding - type batteries |
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| Country | Link |
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| CN (1) | CN205564871U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125963A (en) * | 2021-03-19 | 2021-07-16 | 惠州锂威新能源科技有限公司 | Method for improving performance test of lithium ion battery hot box |
| WO2022165690A1 (en) * | 2021-02-04 | 2022-08-11 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and system therefor, and battery cell and battery |
| WO2022222092A1 (en) * | 2021-04-22 | 2022-10-27 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and manufacturing system therefor, battery cell, and battery |
| CN116344740A (en) * | 2023-05-31 | 2023-06-27 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric equipment |
| WO2023130902A1 (en) * | 2022-01-05 | 2023-07-13 | 宁德时代新能源科技股份有限公司 | Winding type electrode assembly, battery cell, battery and electric device |
| WO2023236598A1 (en) * | 2022-06-06 | 2023-12-14 | 宁德时代新能源科技股份有限公司 | Electrode sheet structure and preparation method therefor, battery cell, and secondary battery |
| WO2023240803A1 (en) * | 2022-06-13 | 2023-12-21 | 宁德时代新能源科技股份有限公司 | Positive electrode sheet, electrode assembly, battery cell, battery, and electrical device |
| WO2023245826A1 (en) * | 2022-06-20 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Positive electrode plate, battery cell, battery, and electric device |
-
2016
- 2016-01-19 CN CN201620049059.4U patent/CN205564871U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022165690A1 (en) * | 2021-02-04 | 2022-08-11 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and system therefor, and battery cell and battery |
| CN115210925A (en) * | 2021-02-04 | 2022-10-18 | 宁德时代新能源科技股份有限公司 | Electrode assembly, manufacturing method and manufacturing system thereof, battery cell and battery |
| CN113125963A (en) * | 2021-03-19 | 2021-07-16 | 惠州锂威新能源科技有限公司 | Method for improving performance test of lithium ion battery hot box |
| WO2022222092A1 (en) * | 2021-04-22 | 2022-10-27 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and manufacturing system therefor, battery cell, and battery |
| CN115516691A (en) * | 2021-04-22 | 2022-12-23 | 宁德时代新能源科技股份有限公司 | Electrode assembly, manufacturing method and manufacturing system thereof, battery cell and battery |
| WO2023130902A1 (en) * | 2022-01-05 | 2023-07-13 | 宁德时代新能源科技股份有限公司 | Winding type electrode assembly, battery cell, battery and electric device |
| WO2023236598A1 (en) * | 2022-06-06 | 2023-12-14 | 宁德时代新能源科技股份有限公司 | Electrode sheet structure and preparation method therefor, battery cell, and secondary battery |
| WO2023240803A1 (en) * | 2022-06-13 | 2023-12-21 | 宁德时代新能源科技股份有限公司 | Positive electrode sheet, electrode assembly, battery cell, battery, and electrical device |
| WO2023245826A1 (en) * | 2022-06-20 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Positive electrode plate, battery cell, battery, and electric device |
| CN116344740A (en) * | 2023-05-31 | 2023-06-27 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric equipment |
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