CN206401440U - A kind of takeup type battery core - Google Patents
A kind of takeup type battery core Download PDFInfo
- Publication number
- CN206401440U CN206401440U CN201621440825.6U CN201621440825U CN206401440U CN 206401440 U CN206401440 U CN 206401440U CN 201621440825 U CN201621440825 U CN 201621440825U CN 206401440 U CN206401440 U CN 206401440U
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- China
- Prior art keywords
- battery core
- pole piece
- layer diaphragm
- bending place
- takeup type
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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 application is related to secondary cell field, specifically, is related to a kind of takeup type battery core.Takeup type battery core includes the flat battery core for being stacked and being wound by the initiating terminal of the first pole piece, the first barrier film, the second pole piece, the second barrier film, first pole piece includes the first collector and is arranged at first outer layer diaphragm and first internal layer diaphragm of first collector with respect to two surfaces, second pole piece includes the second collector and is arranged at second outer layer diaphragm and second internal layer diaphragm of second collector with respect to two surfaces, provided with the first groove for exposing blank collector in first outer layer diaphragm and/or the first internal layer diaphragm, the first lug is located in the first groove；Provided with the second groove for exposing blank collector in second outer layer diaphragm and/or the second internal layer diaphragm, the second lug is located in the second groove.Two lugs of the application are embedded in diaphragm groove, lift the energy density of battery core.
Description
Technical field
The application is related to secondary cell field, specifically, is related to a kind of takeup type battery core.
Background technology
Wide variety of secondary cell, is all made up of the battery core and shell of secondary cell in the market.Wherein, battery core is
Active component, typically by anode pole piece, cathode pole piece and the barrier film being arranged between anode pole piece and cathode pole piece stacking or
Person's winding is formed.Positive plate includes plus plate current-collecting body and is coated in the positive active material on plus plate current-collecting body surface；Negative plate bag
Include negative current collector and be coated in the negative electrode active material on negative current collector surface.
With the commercialized development of secondary battery core, market requires more and more higher, current conventional roll to the energy density of battery core
Around frame mode, as shown in figure 1, tab welding is in empty paper tinsel region, its thickness accounts for the thickness proportion of overall battery core than larger, seriously
Reduce the energy density of battery core.
For the defect of prior art, spy proposes the application.
Utility model content
Present invention purpose is to propose a kind of takeup type battery core.
In order to complete the purpose of the application, the technical scheme used for：
The application is related to a kind of takeup type battery core, and the takeup type battery core is included by the first pole piece, the first barrier film, the second pole
The first lug, institute are connected with the flat battery core that piece, the initiating terminal of the second barrier film are stacked and wound, first pole piece
State and the second lug is connected with the second pole piece；Characterized in that, the site that first pole piece is bent for the first time is first
Bending place；The site that first pole piece is bent for the second time is the second bending place；First pole piece includes the first afflux
Body and it is arranged at first outer layer diaphragm and first internal layer diaphragm of first collector with respect to two surfaces, first outer membrane
Piece is arranged on the face at battery core center, and the first internal layer diaphragm is arranged at towards on the face at battery core center；Described second
Pole piece includes the second collector and is arranged at second collector with respect to the second outer layer diaphragm on two surfaces and the second inner layer film
Piece, the second outer layer diaphragm is arranged on the face at battery core center, and the second internal layer diaphragm is arranged at towards in battery core
On the face of the heart；
Provided with the first groove for exposing blank collector in the first outer layer diaphragm and/or the first internal layer diaphragm,
First lug is located in first groove；Provided with dew in the second outer layer diaphragm and/or the second internal layer diaphragm
Go out the second groove of blank collector, second lug is located in second groove；
The initiating terminal of first pole piece between first bending place be head Kong Bo areas；
The initiating terminal of second pole piece is located between first bending place and second bending place；
Initiating terminal of the initiating terminal of the second outer layer diaphragm and the second internal layer diaphragm with the second collector is flushed.
It is preferred that, the site that the first pole piece third time is bent is the 3rd bending place；The first outer layer diaphragm
Initiating terminal be located at first bending place and arrive between second bending place, the initiating terminal of the first internal layer diaphragm is positioned at the
Around three bending places.
It is preferred that, first bending place is provided with into the first outer layer diaphragm between second bending place exposes sky
First groove of white collector, first lug is located in first groove.
It is preferred that, the site that the first pole piece third time is bent is the 3rd bending place；The first outer layer diaphragm
And/or the site that the first internal layer diaphragm last time is bent is the first pole piece end bending place；
3rd bending place is to the first outer layer diaphragm between the first pole piece end bending place and/or described
Provided with the first groove for exposing blank collector in first internal layer diaphragm, first lug is located in first groove.
It is preferred that, the site that the first outer layer diaphragm and/or the first internal layer diaphragm last time are bent is
First pole piece end bending place；The end of the first outer layer diaphragm and/or the first internal layer diaphragm is primary diaphragm end；
The first pole piece end bending place is to the first outer layer diaphragm between the primary diaphragm end and/or institute
State provided with the groove for exposing blank collector in the first internal layer diaphragm, first lug is located in first groove.
It is preferred that, on the flat battery core thickness direction, the takeup type battery core most inner side continuous overlapping described the
One barrier film and the second barrier film sum are no more than two layers.
It is preferred that, the takeup type battery core end is provided with one section only by first barrier film and/or second barrier film
The barrier film ending section of composition.
It is preferred that, the outer peripheral face of the takeup type battery core is made up of first barrier film and/or second barrier film.
It is preferred that, second pole piece is at least the second empty paper tinsel in the part of the outermost half-turn positioned at the takeup type battery core
Include the second one side with the direct relative part in face at the second Kong Bo areas towards battery core center on area, second pole piece to apply
Cover area.
It is preferred that, second pole piece is at least the second empty paper tinsel in the part of the outermost half-turn positioned at the takeup type battery core
Include the first empty paper tinsel away from the direct relative part in face at battery core center with the second Kong Bo areas on area, first pole piece
Area.
The technical scheme of the application at least has following beneficial effect：
Two lugs of the application are embedded in diaphragm groove, lift the energy density of battery core；By increasing by the first pole piece head
Bu Kongbo areas, the clot and diaphragm for mitigating the first pole piece head one side area comes off, the battery core consistency of performance of raising.
Brief description of the drawings
Fig. 1 is takeup type core strueture schematic diagram in background technology；
Fig. 2 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 3 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 4 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 5 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 6 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 7 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 8 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
1- takeup type battery cores；
The pole pieces of 10- first；
The collectors of 101- first；
102- the first outer layer diaphragms；
103- the first internal layer diaphragms；
The bending places of 104- first；
The bending places of 105- second；
The bending places of 106- the 3rd；
107- the first pole piece ends bending place；
The first Kong Bo of 108- areas；
The pole pieces of 20- second；
The collectors of 201- second；
202- the second outer layer diaphragms；
203- the second internal layer diaphragms；
The second Kong Bo of 204- areas；
The second one sides of 205- coating area；
The barrier films of 30- first；
The barrier films of 40- second；
The lugs of 50- first；
The lugs of 60- second；
70- barrier films ending section.
Embodiment
With reference to specific embodiment, the application is expanded on further.It should be understood that these embodiments are merely to illustrate the application
Rather than limitation scope of the present application.
The application is related to a kind of takeup type battery core 1, includes as shown in Figure 2 by the first pole piece 10, the first barrier film 30, the second pole
The first lug is connected with the flat battery core that piece 20, the initiating terminal of the second barrier film 40 are stacked and wound, the first pole piece 10
50, the second lug 60 is connected with the second pole piece 20；The site that first pole piece 10 is bent for the first time is the first bending place
104；The site that first pole piece 10 is bent for second is the second bending place 105；
First pole piece 10 includes the first collector 101 and is arranged at first outer layer on relative two surfaces of the first collector 101
The internal layer diaphragm 103 of diaphragm 102 and first, the first outer layer diaphragm 102 is arranged on the face at battery core center, the first internal layer diaphragm
103 are arranged at towards on the face at battery core center；It is provided with first outer layer diaphragm 102 and/or the first internal layer diaphragm 103 and exposes blank
First groove (not shown) of collector, the first lug 50 is located in the first groove；
Second pole piece 20 includes the second collector 201 and is arranged at second outer layer on relative two surfaces of the second collector 201
The internal layer diaphragm 203 of diaphragm 202 and second, the second outer layer diaphragm 202 is arranged on the face at battery core center, the second internal layer diaphragm
203 are arranged at towards on the face at battery core center；It is provided with second outer layer diaphragm 202 and/or the second internal layer diaphragm 203 and exposes blank
Second groove (not shown) of collector, the second lug 60 is located in the second groove；
Two lugs of the application are embedded in diaphragm groove, lift the energy density of battery core.
In the embodiment of the present application, the initiating terminal of the second outer layer diaphragm 202 and the second internal layer diaphragm 203 with the second afflux
The initiating terminal of body 201 is flushed, and so as to improve the energy density of battery core to greatest extent, and reduces burr.
In the embodiment of the present application, the initiating terminal of the second pole piece 20 be located at the first bending place 104 and the second bending place 105 it
Between, the initiating terminal of the first pole piece 10 is to being head Kong Bo areas between the first bending place 104, so that it is single to mitigate the head of the first pole piece 10
The clot in face area and diaphragm come off, the battery core consistency of performance of raising.
In the embodiment of the present application, the site that the first pole piece 10 is bent for the third time is outside the 3rd bending place 106, first
The initiating terminal of tunic piece 102 is located at the first bending place 104 and arrived between second bending place 105, of the first internal layer diaphragm 103
Top is located at around the 3rd bending place 106.The head of the first pole piece of the application 10 is what one side was coated, and one side coating area is located at volume
The most inner side of wound battery core.
In the embodiment of the present application, as shown in Figures 2 and 3, the first lug 50 can be located at the head of the first pole piece 10, so that
Polarization can be reduced to a certain extent；It is provided between first the 104 to the second bending place of bending place 105 in first outer layer diaphragm 102
Expose the first groove (not shown) of blank collector, the first lug 50 is located in the first groove.
In the embodiment of the present application, as shown in figure 4, the first lug 50 can be located at the first pole piece 10 middle part, so as to
Polarization is reduced to a certain extent；Specifically, the site that the first pole piece 10 is bent for the third time is the 3rd bending place 106；First
The site that internal layer diaphragm 103 is bent for the last time is the first pole piece end bending place 107；3rd bending place 106 to the first
Provided with the first groove for exposing blank collector, the first lug in the first outer layer diaphragm 102 between pole piece end bending place 107
50 are located in the first groove (not shown).Expose blank collector likewise, can be also provided with the first internal layer diaphragm 103
Groove.
In the embodiment of the present application, as shown in figure 5, the first lug 50 can be located at the first pole piece 10 afterbody, so as to
Polarization is reduced to a certain extent；The site that first internal layer diaphragm 103 is bent for the last time bends for the end of the first pole piece 10
Place 107, the end of the first internal layer diaphragm 103 is primary diaphragm end；The end bending place 107 of first pole piece 10 to primary diaphragm end
Provided with the groove for exposing blank collector in the first outer layer diaphragm 102 between end, the first lug 50 is located at the first groove (in figure
It is not shown) in.Likewise, can also be provided with the groove for exposing blank collector in the first internal layer diaphragm 103.
In the embodiment of the present application, as shown in Fig. 3~Fig. 5, on flat battery core thickness direction (T-T ' directions), winding
Continuous the first overlapping barrier film 30 in formula battery core most inner side and the sum of the second barrier film 40 are no more than two layers.So as to further reduce electricity
The thickness of core, improves the energy density of battery core.
In the embodiment of the present application, in order to improve the bonding between naked battery core and packaging bag, anti-dropping capability, winding are improved
Formula battery core end is provided with one section of barrier film ending section 70 being only made up of the first barrier film 30 and the second barrier film 40, as shown in fig. 6, from
And increase the frictional force between naked battery core lateral surface and packaging bag, be conducive to improving the drop resistance of battery.Wherein, barrier film finishes up
Section 70 can be made up of the first barrier film 30 or the second barrier film 40.
In the embodiment of the present application, as shown in fig. 7, in order to further improve the bonding between naked battery core and packaging bag, rolling up
The outer peripheral face of wound battery core states the first barrier film 30 and the second barrier film 40 is constituted, so as to add naked battery core lateral surface to greatest extent
Frictional force between packaging bag, is conducive to improving the drop resistance of battery.Wherein, the outer peripheral face of battery core can be by the first barrier film 30
Or second barrier film 40 constitute.
In the embodiment of the present application, as figures 2-6, in order to improve the anti-abuse performance of battery core, the second pole piece 20 is at least
It is the second Kong Bo areas 204 in the part of the outermost half-turn positioned at takeup type battery core, with court of the second Kong Bo areas 204 on the second pole piece 20
Include the second one side coating area 205 to the direct relative part in the face at battery core center.On the thickness direction of battery core, the first pole piece
The initiation site of 10 end and the second Kong Bo areas 204 on the second pole piece 20 is substantially flush.I.e. the vest is on the second pole piece 20
The second Kong Bo areas 204 and the second one side coating area 205 formed.Second Kong Bo areas 204 can surround battery core half-turn, so that in electricity
The side of the thickness direction of core forms vest area；Also can surround the whole circle of battery core one so that battery core thickness direction both sides all
Form vest area；When battery core is by abusing, short circuit can preferentially occur for vest area, and avoid burning or the safety such as explode is asked
Topic, so as to improve the security of battery core.
In the embodiment of the present application, as shown in figure 8, anti-abuse performance in order to improve battery core, the second pole piece 20 at least exists
It is to deviate from the second Kong Bo areas 204, the first pole piece 10 with the second Kong Bo areas 204 positioned at the part of the outermost half-turn of takeup type battery core
The direct relative part in the face at battery core center includes the first Kong Bo areas 108.I.e. the vest by the Shang Kongbo areas of the second pole piece 20 with
The Shang Kongbo areas of first pole piece 10 are formed.Likewise, the second Kong Bo areas 204 can surround battery core half-turn, so that in the thickness of battery core
The side in direction forms vest area；Also the whole circle of battery core one can be surrounded, so as to all form vest in the both sides of the thickness direction of battery core
Area.
When the opposite sides of the thickness direction in battery core all forms vest area, battery core both sides crimping portion is also balanced
Thickness, so that the flatness of battery core more preferably, can improve battery core deformation.
It is further preferred that in the embodiment of the present application, lug can be integrally formed with collector, for example, lug directly by
Collector cutting is formed.Or, lug independently forms and is fixed on corresponding blank collector, or lug is fixed on the recessed of pole piece
On blank collector at groove.It is further preferred that the first lug 50 is less than with maximum gauge after the welding of the first collector 101
Or equal to 1.5 times of the first lug 50 and the thickness sum of the first collector 101；And/or, the second lug 60 and the second collector
Maximum gauge is less than or equal to 1.5 times of the thickness sum of the second lug 60 and the second collector 201 after 201 welding.So as to
So that the thickness of extreme ear structure is suitable, it is to avoid because the thickness of extreme ear structure is excessive and caused by the excessive defect of welding kesistance, carry
The internal symmetry of high battery core, adds the reliability of extreme ear structure, so as to avoid deformation, improves the overall performance of battery.
In above-mentioned takeup type battery core 1 in the embodiment of the present application, the first pole piece 10 is cathode sheet, and the second pole piece 20 is
Anode pole piece；Or, first pole piece 10 be anode pole piece, the second pole piece 20 be cathode sheet.It is preferred that, the first pole piece 10 is anode
Pole piece.
It is not for limiting claim, any this area skill although the application is disclosed as above with preferred embodiment
Art personnel can make some possible variations and modification on the premise of the application design is not departed from, therefore the application
The scope that protection domain should be defined by the application claim is defined.
Claims (10)
1. a kind of takeup type battery core, the takeup type battery core is included by the first pole piece, the first barrier film, the second pole piece, the second barrier film
The initiating terminal flat battery core that is stacked and winds, be connected with the first lug, second pole piece on first pole piece
On be connected with the second lug；Characterized in that, the site that first pole piece is bent for the first time is the first bending place；It is described
The site that first pole piece is bent for the second time is the second bending place；First pole piece includes the first collector and is arranged at institute
First outer layer diaphragm and first internal layer diaphragm of first collector with respect to two surfaces are stated, the first outer layer diaphragm, which is arranged at, to deviate from
On the face at battery core center, the first internal layer diaphragm is arranged at towards on the face at battery core center；Second pole piece includes second
Collector and it is arranged at outside the second outer layer diaphragm and the second internal layer diaphragm of second collector with respect to two surfaces, described second
Tunic piece is arranged on the face at battery core center, and the second internal layer diaphragm is arranged at towards on the face at battery core center；
It is described provided with the first groove for exposing blank collector in the first outer layer diaphragm and/or the first internal layer diaphragm
First lug is located in first groove；It is provided with the second outer layer diaphragm and/or the second internal layer diaphragm and exposes sky
Second groove of white collector, second lug is located in second groove；
The initiating terminal of first pole piece between first bending place be head Kong Bo areas；
The initiating terminal of second pole piece is located between first bending place and second bending place；
Initiating terminal of the initiating terminal of the second outer layer diaphragm and the second internal layer diaphragm with the second collector is flushed.
2. takeup type battery core according to claim 1, it is characterised in that the position that the first pole piece third time is bent
Point is the 3rd bending place；The initiating terminal of the first outer layer diaphragm be located at first bending place to second bending place it
Between, the initiating terminal of the first internal layer diaphragm is located at around the 3rd bending place.
3. takeup type battery core according to claim 2, it is characterised in that first bending place to second bending place
Between in the first outer layer diaphragm provided with the first groove for exposing blank collector, it is recessed that first lug is located at described first
In groove.
4. takeup type battery core according to claim 1, it is characterised in that the position that the first pole piece third time is bent
Point is the 3rd bending place；The site that the first outer layer diaphragm and/or the first internal layer diaphragm last time are bent is
First pole piece end bending place；
3rd bending place is to the first outer layer diaphragm and/or described first between the first pole piece end bending place
Provided with the first groove for exposing blank collector in internal layer diaphragm, first lug is located in first groove.
5. takeup type battery core according to claim 1, it is characterised in that the first outer layer diaphragm and/or described first
The site that internal layer diaphragm last time is bent is the first pole piece end bending place；The first outer layer diaphragm and/or described
The end of first internal layer diaphragm is primary diaphragm end；
The first pole piece end bending place is to the first outer layer diaphragm between the primary diaphragm end and/or described
Provided with the groove for exposing blank collector in one internal layer diaphragm, first lug is located in first groove.
6. the takeup type battery core according to Claims 1 to 5 any claim, it is characterised in that the flat battery core
On thickness direction, the takeup type battery core most continuous overlapping first barrier film in inner side and the second barrier film sum are no more than
Two layers.
7. the takeup type battery core according to Claims 1 to 5 any claim, it is characterised in that the takeup type battery core
End is provided with one section of barrier film ending section being only made up of first barrier film and/or second barrier film.
8. the takeup type battery core according to Claims 1 to 5 any claim, it is characterised in that the takeup type battery core
Outer peripheral face be made up of first barrier film and/or second barrier film.
9. the takeup type battery core according to Claims 1 to 5 any claim, it is characterised in that second pole piece is extremely
Few is empty with described second on the second Kong Bo areas, second pole piece in the part of the outermost half-turn positioned at the takeup type battery core
The direct relative part in face at paper tinsel area towards battery core center includes the second one side coating area.
10. the takeup type battery core according to Claims 1 to 5 any claim, it is characterised in that second pole piece is extremely
Few is empty with described second on the second Kong Bo areas, first pole piece in the part of the outermost half-turn positioned at the takeup type battery core
Paper tinsel area includes the first Kong Bo areas away from the direct relative part in face at battery core center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621440825.6U CN206401440U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621440825.6U CN206401440U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206401440U true CN206401440U (en) | 2017-08-11 |
Family
ID=59512194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621440825.6U Active CN206401440U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
Country Status (1)
| Country | Link |
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| CN (1) | CN206401440U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808377A (en) * | 2018-08-06 | 2020-02-18 | 宁德新能源科技有限公司 | Battery cell, battery and electronic equipment |
| WO2021134599A1 (en) * | 2019-12-31 | 2021-07-08 | 宁德新能源科技有限公司 | Battery and electronic device |
| WO2021195923A1 (en) * | 2020-03-31 | 2021-10-07 | 宁德新能源科技有限公司 | Battery cell structure and battery |
| WO2021195926A1 (en) * | 2020-03-31 | 2021-10-07 | 宁德新能源科技有限公司 | Battery cell structure and battery |
| CN114586191A (en) * | 2021-07-23 | 2022-06-03 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| WO2023020119A1 (en) * | 2021-08-19 | 2023-02-23 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and powered device |
| WO2023088431A1 (en) * | 2021-11-18 | 2023-05-25 | 珠海冠宇电池股份有限公司 | Core and battery |
-
2016
- 2016-12-27 CN CN201621440825.6U patent/CN206401440U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808377A (en) * | 2018-08-06 | 2020-02-18 | 宁德新能源科技有限公司 | Battery cell, battery and electronic equipment |
| WO2021134599A1 (en) * | 2019-12-31 | 2021-07-08 | 宁德新能源科技有限公司 | Battery and electronic device |
| US11862805B2 (en) | 2019-12-31 | 2024-01-02 | Ningde Amperex Technology Limited | Battery and electronic device using the same |
| WO2021195923A1 (en) * | 2020-03-31 | 2021-10-07 | 宁德新能源科技有限公司 | Battery cell structure and battery |
| WO2021195926A1 (en) * | 2020-03-31 | 2021-10-07 | 宁德新能源科技有限公司 | Battery cell structure and battery |
| CN113826256A (en) * | 2020-03-31 | 2021-12-21 | 宁德新能源科技有限公司 | Battery cell structure and battery |
| CN113875059A (en) * | 2020-03-31 | 2021-12-31 | 宁德新能源科技有限公司 | Battery cell structure and battery |
| CN113875059B (en) * | 2020-03-31 | 2023-06-06 | 宁德新能源科技有限公司 | Battery cell structure and battery |
| CN114586191A (en) * | 2021-07-23 | 2022-06-03 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| WO2023020119A1 (en) * | 2021-08-19 | 2023-02-23 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and powered device |
| WO2023088431A1 (en) * | 2021-11-18 | 2023-05-25 | 珠海冠宇电池股份有限公司 | Core and battery |
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