CN205992575U - Positive plate and coiled lithium-ion power battery core and lithium-ion-power cell - Google Patents
Positive plate and coiled lithium-ion power battery core and lithium-ion-power cell Download PDFInfo
- Publication number
- CN205992575U CN205992575U CN201620771349.XU CN201620771349U CN205992575U CN 205992575 U CN205992575 U CN 205992575U CN 201620771349 U CN201620771349 U CN 201620771349U CN 205992575 U CN205992575 U CN 205992575U
- Authority
- CN
- China
- Prior art keywords
- positive plate
- kink
- lithium
- plate
- battery core
- 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.)
- Ceased
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 24
- 230000004888 barrier function Effects 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 238000005452 bending Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 abstract description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052744 lithium Inorganic materials 0.000 abstract description 7
- 238000004458 analytical method Methods 0.000 abstract description 5
- 238000007731 hot pressing Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000009831 deintercalation Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000001376 precipitating effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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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- Secondary Cells (AREA)
Abstract
This utility model is related to positive plate and coiled lithium-ion power battery core and lithium-ion-power cell, positive plate includes positive plate body, positive plate coating is coated with positive plate body, have for positive plate bending part corresponding with negative plate kink on positive plate body, the at least one side of positive plate bending part is provided with insulation barrier structure, in battery charging process, there is no lithium ion deintercalation in positive plate kink on positive plate, activated lithium ion is not therefore just had on corresponding negative plate bending part yet, prevent the probability of negative plate kink precipitating metal lithium, decrease negative plate kink in winding battery core hot pressing in prior art and easily drop off the problem that inside battery analysis lithium when leading to use causes short circuit, improve the usage safety performance of battery.
Description
Technical field
This utility model belong to lithium ion power battery technology field and in particular to a kind of positive plate and use this positive plate
Coiled lithium-ion power battery core and lithium-ion-power cell.
Background technology
Pure electric vehicle technology is ripe day by day, and Development of HEV Technology is gradually perfect, and lithium-ion-power cell is various
The main energetic carrier of electric vehicle and power resources, are also the key component of electric vehicle car load.These lithium ions move
Power battery, except having the characteristics such as high power capacity, long-life, should also have high safety performance, can be only achieved standard and the satisfaction of use
The demand of people, really could be accepted by market.
In order to ensure that lithium ion battery has a high safety performance, need excluding all potential safety hazards.Lithium ion power electricity
The core strueture in pond is broadly divided into two big class, respectively stacked and takeup type.Takeup type battery core is due to the production work of its maturation
Skill and high production efficiency, become the main core strueture of lithium-ion-power cell.Takeup type battery core includes positive plate, negative pole
Piece and the barrier film being arranged between adjacent positive/negative plate, it is to be coated with positive plate on positive plate that positive plate is coated with anode sizing agent
Coating, it is to be coated with negative plate coating on negative plate that negative plate is coated with cathode size, and negative plate has negative plate bending
Portion, with negative plate kink to there being positive plate kink on positive plate, is mainly graphite in cathode size, also contains conductive agent
With binding agent etc., when carrying out hot-forming after electric core winding, on the negative plate kink of internal layer, the cathode size of coating is easy
Peel off and drop off phenomenon, especially the closer to internal ground floor battery core, because bending angle is bigger, more easily drop off, lead to
More being susceptible in battery charging process analyse the phenomenon of lithium, thus leading to lithium-ion-power cell internal short-circuit, existing huge
Potential safety hazard.
Utility model content
The purpose of this utility model is to provide a kind of positive plate to reduce in winding battery core hot pressing in prior art
Negative plate kink easily drops off the problem that inside battery when leading to use occurs analysis lithium；Meanwhile, the purpose of this utility model is also
It is to provide a kind of coiled lithium-ion power battery core using this positive plate and lithium-ion-power cell.
For achieving the above object, the technical scheme of positive plate of the present utility model is：Positive plate, including positive plate body,
Positive plate coating is coated with positive plate body, positive plate body has curved for positive plate corresponding with negative plate kink
Folding part position, at least one side of described positive plate bending part is provided with insulation barrier structure.
Described insulation barrier structure is located at the two sides of corresponding positive plate bending part.
Described insulation barrier structure is insulating tape.
The technical scheme of coiled lithium-ion power battery core of the present utility model is：Coiled lithium ion electrokinetic cell
Battery core, including positive plate and negative plate, negative plate is coated with negative plate coating, and negative plate has multiple negative plate bending parts,
Positive plate includes positive plate body, and positive plate body is coated with positive plate coating, positive plate body has curved with negative plate
Folding part corresponding positive plate kink, at least one side of described positive plate kink is provided with insulation barrier structure.
Described insulation barrier structure covers positive plate coating along the size of positive plate width.
Described insulation barrier structure is located at the two sides of positive plate kink.
Described insulation barrier structure is at least at each positive plate kink of the positive plate of three first layers from the inside to the outside of battery core.
Described insulation system is the insulating tape being attached on corresponding positive plate kink.
The technical scheme of lithium-ion-power cell of the present utility model is：Lithium-ion-power cell, including housing and winding
Formula battery core, takeup type battery core includes positive plate, negative plate and the barrier film being arranged between positive and negative plate, and negative plate is coated with
Negative plate coating, negative plate has multiple negative plate bending parts, and positive plate includes positive plate body, and positive plate body is coated with
Positive plate coating, positive plate body has positive plate kink corresponding with negative plate kink, described positive plate kink
At least one side be provided with insulation barrier structure.
Described insulation barrier structure is at least at each positive plate kink of the positive plate of three first layers from the inside to the outside of battery core.
The beneficial effects of the utility model are：In coiled lithium-ion power battery core hot pressing, in negative on negative plate
Pole piece kink, especially the closer to internal layer, negative plate disbonding negative plate more easily occurring coat even exposes negative pole
The phenomenon of piece, on positive plate body, at least one side in corresponding positive plate kink is provided with insulation barrier structure, insulation
Barrier structure be located at positive plate coating outside be used for stop passing through of lithium ion, in battery charging process, on positive plate in
Positive plate kink does not have lithium ion deintercalation, does not therefore just have activated lithium ion on corresponding negative plate bending part yet,
Prevent the probability of negative plate kink precipitating metal lithium, decrease negative plate in winding battery core hot pressing in prior art
Kink easily drops off inside battery when leading to use and analyses the problem that lithium causes short circuit, improves the usage safety performance of battery.
Brief description
Fig. 1 is the structural representation before the negative plate winding in an embodiment of lithium-ion-power cell of the present utility model
Figure；
Fig. 2 is the structural representation before positive plate winding；
Fig. 3 is the structural representation of takeup type battery core.
Specific embodiment
Below in conjunction with the accompanying drawings embodiment of the present utility model is described further.Lithium ion battery of the present utility model
The specific embodiment of battery core, as shown in Figure 1 to Figure 3, takeup type battery core including housing with located at enclosure interior, takeup type battery core
Including the barrier film 10 between positive plate 5, negative plate 1 and setting positive and negative plate.Positive plate 5 includes positive plate body, and positive plate is originally
Positive plate coating 6 is coated with the two sides of body, the blank space on positive plate body is positive plate lug 7, negative plate 1 includes bearing
Pole piece body, the two sides of negative plate body is coated with negative plate coating 2, and the blank space on negative plate body is negative plate pole
Ear 3, negative plate body has multiple negative plate kinks 4, positive plate body has corresponding with negative plate kink 4 just
Pole piece kink 8, on positive plate body, the two sides in positive plate kink 8 is all sticked insulating tape 9, the length of insulating tape 9
Across positive plate coating 6 along the size on positive plate 5 width, insulating tape 9 is PET material to degree, the width of insulating tape 9
For 5-10 millimeter, thickness is 10-50 micron, gives the positive plate of takeup type battery core front two-layer from the inside to the outside in the present embodiment
Each positive plate kink is provided with insulating tape 9, and each layer has two kinks, and front two-layer has 4 kinks altogether.As Fig. 1 institute
Show, negative plate 1, before winding, negative plate body has for negative plate bending part corresponding with positive plate kink, bear
Pole piece bending part forms the negative plate kink after winding；As shown in Fig. 2 positive plate 5 is before winding, positive plate body has
Have for positive plate bending part corresponding with negative plate kink, positive plate bending part forms positive plate bending after winding
Portion.
All it is sticked insulating tape 9 on the two sides of positive plate kink 8, in charging process, positive plate kink 8 will not be sent out
Raw electrochemical reaction, does not have lithium ion deintercalation, does not therefore occur Lithium-ion embeding to react in negative plate bending part 4, there is not analysis
The probability of lithium, decreases in prior art negative plate kink 4 in winding battery core hot pressing and easily drops off when leading to use
The problem that inside battery is short-circuited.
In other embodiment of the present utility model, the length of insulating tape might be less that anode sizing agent along positive plate width
Size on degree direction；Insulating tape can also be set simultaneously in positive plate kink and negative plate kink；PET material exhausted
Edge adhesive tape can also be replaced the two sides for being attached at positive plate kink by the insulating tape of PI material；Can also be curved in positive pole
The two sides of folding part or one side are smeared insulating cement and are replaced insulating tape to play the effect of insulation barrier structure；Meeting use requirement
In the case of only insulating tape can also be set in the one side of positive plate kink；Insulating tape can also only located at battery core just
On the positive plate kink of wherein a layer of pole piece；Insulating tape can also be arranged at the 4th layer and the 4th layer from the inside to the outside
On wherein one or more layers each positive plate kink in addition.
Volume in each embodiment of the embodiment of coiled lithium-ion power battery core and above-mentioned lithium-ion-power cell
The embodiment of wound battery core is identical, and here is omitted.
The embodiment of positive plate is identical with the embodiment of the positive plate in each embodiment of above-mentioned lithium-ion-power cell, this
Place repeats no more.
Claims (10)
1. positive plate, including positive plate body, positive plate body is coated with positive plate coating, positive plate body has for
Positive plate bending part corresponding with negative plate kink it is characterised in that：At least one side of described positive plate bending part
It is provided with insulation barrier structure.
2. positive plate according to claim 1 it is characterised in that：Described insulation barrier structure is curved located at corresponding positive plate
The two sides of folding part position.
3. positive plate according to claim 1 and 2 it is characterised in that：Described insulation barrier structure is insulating tape.
4. coiled lithium-ion power battery core, including positive plate and negative plate, negative plate is coated with negative plate coating, bears
Pole piece has multiple negative plate bending parts, and positive plate includes positive plate body, positive plate body is coated with positive plate coating, just
Positive plate kink corresponding with negative plate kink is had on pole piece body it is characterised in that：Described positive plate kink
At least one side is provided with insulation barrier structure.
5. coiled lithium-ion power battery core according to claim 4 it is characterised in that：Described insulation barrier structure
Cover positive plate coating along the size of positive plate width.
6. coiled lithium-ion power battery core according to claim 4 it is characterised in that：Described insulation barrier structure
Two sides located at positive plate kink.
7. coiled lithium-ion power battery core according to claim 4 it is characterised in that：Described insulation barrier structure
At least at each positive plate kink of the positive plate of three first layers from the inside to the outside of battery core.
8. the coiled lithium-ion power battery core according to any one of claim 4-7 it is characterised in that：Described insulation
Barrier structure is the insulating tape being attached on corresponding positive plate kink.
9. lithium-ion-power cell, including housing and takeup type battery core, takeup type battery core includes positive plate, negative plate and is arranged at
Barrier film between positive and negative plate, negative plate is coated with negative plate coating, and negative plate has multiple negative plate bending parts, positive pole
Piece includes positive plate body, and positive plate body is coated with positive plate coating, positive plate body has and negative plate kink
Corresponding positive plate kink it is characterised in that：At least one side of described positive plate kink is provided with insulation barrier structure.
10. lithium-ion-power cell according to claim 9 it is characterised in that：Described insulation barrier structure at least located at
At each positive plate kink of the positive plate of three first layers from the inside to the outside of battery core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620771349.XU CN205992575U (en) | 2016-07-21 | 2016-07-21 | Positive plate and coiled lithium-ion power battery core and lithium-ion-power cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620771349.XU CN205992575U (en) | 2016-07-21 | 2016-07-21 | Positive plate and coiled lithium-ion power battery core and lithium-ion-power cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205992575U true CN205992575U (en) | 2017-03-01 |
Family
ID=58102898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620771349.XU Ceased CN205992575U (en) | 2016-07-21 | 2016-07-21 | Positive plate and coiled lithium-ion power battery core and lithium-ion-power cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205992575U (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109216744A (en) * | 2017-06-29 | 2019-01-15 | 北京小米移动软件有限公司 | Battery core pole piece, battery core, battery and electronic equipment |
| CN110364769A (en) * | 2019-07-31 | 2019-10-22 | 瑞浦能源有限公司 | A kind of winding battery core and battery |
| WO2021003679A1 (en) * | 2019-07-09 | 2021-01-14 | 宁德新能源科技有限公司 | Cathode sheet and electrode assembly having same |
| CN113036315A (en) * | 2019-12-25 | 2021-06-25 | 华为技术有限公司 | Battery and terminal equipment |
| WO2022036721A1 (en) * | 2020-08-21 | 2022-02-24 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and method and apparatus for manufacturing electrode assembly |
| CN114171852A (en) * | 2021-12-06 | 2022-03-11 | 珠海冠宇电池股份有限公司 | Battery core and battery |
| CN114335684A (en) * | 2021-12-28 | 2022-04-12 | 安普瑞斯（无锡）有限公司 | Lithium ion battery roll core and battery |
| CN114447266A (en) * | 2021-12-16 | 2022-05-06 | 上海兰钧新能源科技有限公司 | Pole piece, roll up core and battery |
| CN114628795A (en) * | 2022-03-31 | 2022-06-14 | 珠海冠宇电池股份有限公司 | Lithium ion battery |
| WO2022165728A1 (en) * | 2021-02-04 | 2022-08-11 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and device and method for manufacturing electrode assembly |
| WO2022236736A1 (en) * | 2021-05-12 | 2022-11-17 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and electrical device |
| WO2023010479A1 (en) * | 2021-08-05 | 2023-02-09 | 宁德时代新能源科技股份有限公司 | Electrode assembly and processing method and apparatus, battery cell, battery, and electrical apparatus |
| WO2023035763A1 (en) * | 2021-09-10 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Electrode assembly and battery cell related to same, and battery, apparatus and manufacturing method |
| WO2023060529A1 (en) * | 2021-10-15 | 2023-04-20 | 宁德时代新能源科技股份有限公司 | Lithium ion battery |
| EP4102607A4 (en) * | 2021-04-23 | 2023-05-03 | Contemporary Amperex Technology Co., Limited | Electrode assembly, battery cell, battery, and method and device for manufacturing electrode assembly |
| WO2023123186A1 (en) * | 2021-12-30 | 2023-07-06 | 宁德时代新能源科技股份有限公司 | Electrode assembly, secondary battery, battery module, battery pack, and electric device |
| WO2023138440A1 (en) * | 2022-01-21 | 2023-07-27 | 宁德时代新能源科技股份有限公司 | Electrode assembly, winding apparatus and method, battery cell, battery, and electrical device |
| EP4131543A4 (en) * | 2020-03-31 | 2023-11-29 | Ningde Amperex Technology Ltd. | Electrochemical apparatus and electronic apparatus |
| WO2024066624A1 (en) * | 2022-09-26 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Negative electrode sheet and preparation method therefor, and electrode assembly, battery cell, battery and electric apparatus |
-
2016
- 2016-07-21 CN CN201620771349.XU patent/CN205992575U/en not_active Ceased
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|---|---|---|---|---|
| CN109216744A (en) * | 2017-06-29 | 2019-01-15 | 北京小米移动软件有限公司 | Battery core pole piece, battery core, battery and electronic equipment |
| WO2021003679A1 (en) * | 2019-07-09 | 2021-01-14 | 宁德新能源科技有限公司 | Cathode sheet and electrode assembly having same |
| CN112970132A (en) * | 2019-07-09 | 2021-06-15 | 宁德新能源科技有限公司 | Cathode sheet and electrode assembly having the same |
| CN110364769A (en) * | 2019-07-31 | 2019-10-22 | 瑞浦能源有限公司 | A kind of winding battery core and battery |
| CN113036315A (en) * | 2019-12-25 | 2021-06-25 | 华为技术有限公司 | Battery and terminal equipment |
| EP4131543A4 (en) * | 2020-03-31 | 2023-11-29 | Ningde Amperex Technology Ltd. | Electrochemical apparatus and electronic apparatus |
| KR20220134004A (en) * | 2020-08-21 | 2022-10-05 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Method and apparatus for manufacturing electrode assemblies, battery cells, batteries and electrode assemblies |
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| KR102635995B1 (en) | 2020-08-21 | 2024-02-14 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Method and apparatus for manufacturing electrode assemblies, battery cells, batteries and electrode assemblies |
| US11843119B2 (en) * | 2020-08-21 | 2023-12-12 | Contemporary Amperex Technology Co., Limited | Electrode assembly, battery cell, battery, and method and apparatus for manufacturing electrode assembly |
| CN115066782A (en) * | 2020-08-21 | 2022-09-16 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and method and apparatus for manufacturing electrode assembly |
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| CN115803925A (en) * | 2021-02-04 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and apparatus and method for manufacturing electrode assembly |
| CN115803925B (en) * | 2021-02-04 | 2023-11-03 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and apparatus and method for manufacturing electrode assembly |
| US12107232B2 (en) | 2021-02-04 | 2024-10-01 | Contemporary Amperex Technology (Hong Kong) Limited | Electrode assembly, battery cell, battery, and manufacturing device and method for electrode assembly |
| EP4102607A4 (en) * | 2021-04-23 | 2023-05-03 | Contemporary Amperex Technology Co., Limited | Electrode assembly, battery cell, battery, and method and device for manufacturing electrode assembly |
| WO2022236736A1 (en) * | 2021-05-12 | 2022-11-17 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and electrical device |
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| CN115623875B (en) * | 2021-05-12 | 2023-12-12 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electricity utilization device |
| WO2023010479A1 (en) * | 2021-08-05 | 2023-02-09 | 宁德时代新能源科技股份有限公司 | Electrode assembly and processing method and apparatus, battery cell, battery, and electrical apparatus |
| WO2023035541A1 (en) * | 2021-09-10 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric apparatus |
| WO2023035763A1 (en) * | 2021-09-10 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Electrode assembly and battery cell related to same, and battery, apparatus and manufacturing method |
| WO2023060529A1 (en) * | 2021-10-15 | 2023-04-20 | 宁德时代新能源科技股份有限公司 | Lithium ion battery |
| CN114171852A (en) * | 2021-12-06 | 2022-03-11 | 珠海冠宇电池股份有限公司 | Battery core and battery |
| CN114447266A (en) * | 2021-12-16 | 2022-05-06 | 上海兰钧新能源科技有限公司 | Pole piece, roll up core and battery |
| CN114335684A (en) * | 2021-12-28 | 2022-04-12 | 安普瑞斯（无锡）有限公司 | Lithium ion battery roll core and battery |
| WO2023123186A1 (en) * | 2021-12-30 | 2023-07-06 | 宁德时代新能源科技股份有限公司 | Electrode assembly, secondary battery, battery module, battery pack, and electric device |
| WO2023138440A1 (en) * | 2022-01-21 | 2023-07-27 | 宁德时代新能源科技股份有限公司 | Electrode assembly, winding apparatus and method, battery cell, battery, and electrical device |
| CN114628795A (en) * | 2022-03-31 | 2022-06-14 | 珠海冠宇电池股份有限公司 | Lithium ion battery |
| WO2024066624A1 (en) * | 2022-09-26 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Negative electrode sheet and preparation method therefor, and electrode assembly, battery cell, battery and electric apparatus |
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