CN211455865U - Battery cell and battery adopting same - Google Patents
Battery cell and battery adopting same Download PDFInfo
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- CN211455865U CN211455865U CN202020449774.3U CN202020449774U CN211455865U CN 211455865 U CN211455865 U CN 211455865U CN 202020449774 U CN202020449774 U CN 202020449774U CN 211455865 U CN211455865 U CN 211455865U
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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 application discloses electric core, including first pole piece, diaphragm, second pole piece and filling layer, first pole piece includes the first mass flow body, first diaphragm and the first utmost point ear of being connected with the first mass flow body electricity, and first diaphragm sets up in the first mass flow body on the surface, and the first mass flow body is including not setting up the blank area of first diaphragm. The second pole piece comprises a second current collector, a second diaphragm and a second pole lug connected with the second current collector, the second diaphragm is arranged on the surface of the second current collector, and the first pole piece, the diaphragm and the second pole piece are wound to form a battery core. In the length direction of the first current collector, the first lug is arranged in the middle of the first current collector, and in the length direction of the second current collector, the second lug is arranged in the middle of the second current collector. The battery cell further comprises a filling layer, and the filling layer is arranged on the surface of the blank area. Still relate to a battery that adopts above-mentioned electric core, above-mentioned electric core can avoid appearing the bad condition of pressurized in the pressfitting stage.
Description
Technical Field
The application relates to the technical field of batteries, in particular to an electric core and a battery adopting the electric core.
Background
With the aging process of the battery industry, the battery is widely applied to the fields of consumer electronics, battery automobiles, electric tools and the like. In particular, in some small consumer electronics, the usage scenario of the battery made of the nanocomposite material is more and more extensive due to the high rate output capability of the battery.
However, in the process of winding the battery cell, because the lengths of the starting end of the anode plate and the starting end of the cathode plate are different, in the battery cell formation stage, the situation of poor pressure can occur, a good solid electrolyte membrane cannot be formed, so that the electrolyte consumption speed is too high, and the situations of lithium precipitation or serious interface black and white formation of the battery cell are caused. And, weld the lug on the pole piece of this kind of electric core for the charge-discharge of lug also receives the influence.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a cell and a battery using the cell, which are capable of uniformly compressing the cell to form a good fixed electrolyte membrane, so as to improve the interface stability and the cycle performance of the cell.
An embodiment of the present application provides an electric core, include:
the first pole piece comprises a first current collector, a first membrane and a first tab electrically connected with the first current collector, wherein the first membrane is arranged on the surface of the first current collector, and the first current collector comprises a blank area without the first membrane;
a diaphragm; and
the second pole piece comprises a second current collector, a second diaphragm and a second pole lug connected with the second current collector, the second diaphragm is arranged on the surface of the second current collector, and the first pole piece, the diaphragm and the second pole lug are wound to form the battery core;
in the length direction of the first current collector, the first tab is arranged in the middle of the first current collector, and in the length direction of the second current collector, the second tab is arranged in the middle of the second current collector;
the battery cell further comprises a filling layer, and the filling layer is arranged on the surface of the blank area.
In at least one embodiment, the initial end of the first current collector is provided with the blank region, the initial end includes a first straight section and a first bending section connected with the first straight section, and the filling layer is disposed on the surface of the first straight section.
In at least one embodiment, the filler layer is disposed on a surface of the first straight section and the first bent section.
In at least one embodiment, the blank region of the first current collector includes a second straight section opposite to the first straight section and a second bent section opposite to the first bent section, the second straight section and the second bent section are connected, and the filling layer is disposed on a surface of the second straight section.
In at least one embodiment, the filler layer is disposed on the surfaces of the second straight section and the second bent section.
In at least one embodiment, the filler layer is disposed on a surface of the first and second straight segments.
In at least one embodiment, the ending section of the first current collector is provided with the blank region, the ending section includes a third bent section and a third straight section connected with the third bent section, and the filling layer is disposed on a surface of the third straight section.
In at least one embodiment, the filling layer is disposed on the surfaces of the third straight section and the third bent section.
In at least one embodiment, the first diaphragm is disposed on a surface of the starting end of the first current collector, the second diaphragm is disposed on a surface of the starting end of the second current collector, the first pole piece is an anode pole piece, and the second pole piece is a cathode pole piece.
In at least one embodiment, in the thickness direction of the battery cell, the filling layer does not overlap with the second membrane at the starting end of the second pole piece.
The application also provides a battery, which comprises a shell and an electric core, wherein the electric core is contained in the shell, and the electric core is any one of the electric cores.
The utility model provides a pair of electric core and adopt battery of this electric core through set up the filling layer in blank region to it can the pressurized evenly to solve first pole piece and second pole piece in the formation stage, with stability and the circulation performance at improvement its interface. Simultaneously, set up first utmost point ear at the middle part of first pole piece, the second utmost point ear sets up the middle part at the second pole piece, can improve the charge-discharge efficiency of electric core.
Drawings
Fig. 1 is a schematic perspective view of a battery cell in an embodiment.
Fig. 2 is a schematic cross-sectional view of the battery cell shown in fig. 1 in the thickness direction in the first embodiment.
Fig. 3 is a schematic cross-sectional view of the battery cell shown in fig. 1 in the thickness direction in a second embodiment.
Fig. 4 is a schematic cross-sectional view of the battery cell shown in fig. 1 in the thickness direction in a third embodiment.
Fig. 5 is a schematic cross-sectional view of the battery cell shown in fig. 1 in the thickness direction in a fourth embodiment.
Fig. 6 is a schematic cross-sectional view of the battery cell shown in fig. 1 in the thickness direction in a fifth embodiment.
Fig. 7 is a schematic cross-sectional view of the battery cell shown in fig. 1 in the thickness direction in a sixth embodiment.
Fig. 8 is a schematic cross-sectional view of the battery cell shown in fig. 1 in the thickness direction in the seventh embodiment.
Description of the main elements
First current collector 11
Starting end 111, 311
First straight section 1111
Second straight section 1121
A tail end 113
Third straight section 1131
Second current collector 31
The filling layer 40
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The application provides a battery cell, which comprises a first pole piece, a diaphragm, a second pole piece and a filling layer. First pole piece include first mass flow body, first diaphragm and with first utmost point ear of being connected of the first mass flow body electricity, first diaphragm set up in first mass flow body on the surface, first mass flow body is including not setting up the blank area of first diaphragm. The second pole piece include the second mass flow body, second diaphragm and with the second utmost point ear that the second mass flow body is connected, the second diaphragm set up in the second mass flow body on the surface, first pole piece the diaphragm with the second pole piece is convoluteed and is formed electric core. And in the length direction of the first current collector, the first lug is arranged in the middle of the first current collector, and in the length direction of the second current collector, the second lug is arranged in the middle of the second current collector. The filling layer is arranged on the surface of the blank area.
According to the battery cell provided by the invention, the filling layer is arranged in the blank area, so that the first pole piece and the second pole piece are formed after the battery cell is wound, the first pole piece and the second pole piece are well pressed, the phenomenon that a good fixed electrolyte membrane cannot be formed due to the fact that filling is not needed is avoided, and the interface stability and the cycle performance of the battery cell can be improved. Meanwhile, the first tab is arranged in the middle of the first current collector, and the second tab is arranged in the middle of the second current collector, so that the tab charge-discharge efficiency is improved.
In the following, some embodiments of the present application will be described in detail, and features in the following embodiments, that is, embodiments, may be combined with each other without conflict.
First embodiment
Referring to fig. 1 and fig. 2, a battery cell 100 is provided, which includes a first pole piece 10, a separator 20, a second pole piece 30, and a filling layer 40. First pole piece 10 includes first mass flow body 11, first diaphragm 12 and with first utmost point ear 13 that first mass flow body 11 electricity is connected, first diaphragm 12 set up in first mass flow body 11 is on the surface, first mass flow body 11 is including not setting up blank area 112 of first diaphragm 12. The second pole piece 30 includes the second current collector 31, the second diaphragm 32 and with the second utmost point ear 33 that the second current collector 31 is connected, the second diaphragm 32 set up in the second current collector 31 on the surface, the first pole piece 10 the diaphragm 20 with the second pole piece 30 is convoluteed and is formed electricity core 100. It is understood that, in other embodiments, the first pole piece 10, the separator 20, and the second pole piece 30 may also be stacked to form the battery cell 100. In the length direction of the first current collector 11, the first tab 13 is disposed in the middle of the first current collector 11, and in the length direction of the second current collector 31, the second tab 33 is disposed in the middle of the second current collector 31. The filling layer 40 is disposed on the surface of the blank region 112 to fill the vacant regions or the projected positions of the vacant regions in the length direction of the first pole piece 10 and the second pole piece 30.
The projection lengths of the innermost layer of the first pole piece 10 and the innermost layer of the second pole piece 30 in the width direction of the battery cell 100 are different, and the projection length of the innermost layer of the first pole piece 10 is longer than the projection length of the innermost layer of the second pole piece 30. And a filling layer 40 is provided in order to supplement this difference.
Referring to fig. 2, in order to better describe the structures and make the structures clearer, the structure of the battery cell 100 is described with reference to left, right, upper and lower coordinate axes.
The first current collector 11 includes a starting end 111, and the blank region 112 included in the first current collector 11 is located on the starting end 111. The first current collector 11 is made of a copper foil material, and further, the first pole piece 10 is an anode pole piece.
The starting end 111 includes a first straight section 1111 and a first bent section 1112, the first straight section 1111 and the first bent section 1112 are connected, and the first diaphragm 12 is disposed on a surface of the starting end 111.
The first diaphragm 12 includes a first diaphragm portion 121 and a second diaphragm portion 122, and the first diaphragm portion 121 and the second diaphragm portion 122 are respectively disposed on two opposite surfaces of the first current collector 11. Further, when the first membrane portion 121 and the second membrane portion 122 are disposed on the starting end 111 of the first current collector 11, the starting ends of the first membrane portion 121 and the second membrane portion 122 are different. The length of the first film portion 121 is greater than the length of the second film portion 122, that is, the first film portion 121 is disposed at a longer distance on the starting end 111 than the second film portion 122.
That is, an area from an end of the first membrane portion 121 to an end of the start end 111 is the blank area 112.
First utmost point ear 13 is located the middle part of first mass flow body 11, specifically, when first pole piece 10 extends to become a slice structure, first utmost point ear 13 is located the well position department of first pole piece 10. The first tab 13 is disposed at the middle position of the first current collector 11, so that the transmission distance of the first tab 13 is reduced, thereby improving the charging and discharging capacity thereof.
Referring to fig. 2, the second current collector 31 of the second pole piece 30 includes a start end 311, and the surface of the start end 311 is provided with the second membrane 32. The second current collector 31 is made of an aluminum foil material, and further, the second pole piece 30 is a cathode pole piece.
The second diaphragm 32 includes a third diaphragm portion 321 and a fourth diaphragm portion 322, and the third diaphragm portion 321 and the fourth diaphragm portion 322 are respectively disposed on two opposite surfaces of the second current collector 31. Further, when the third membrane portion 321 and the fourth membrane portion 322 are disposed on the starting end 311 of the second current collector 31, the starting ends of the third membrane portion 321 and the fourth membrane portion 322 are the same.
The second tab 33 is located in the middle of the second current collector 31, and the same as the first tab 13 is that when the second tab 30 is extended into a sheet structure, the second tab 33 is located at the middle position of the second tab 30. The second electrode tab 30 is disposed at the middle position of the second current collector 31, and also improves its charge and discharge capacity.
The filling layer 40 is disposed on the surface of the blank region 112, and the filling layer 40 and the first membrane portion 121 are located on the same side of the first current collector 11. In the thickness direction of the battery cell 100, the filling layer 40 does not overlap with the second diaphragm 32 on the starting end 311 of the second current collector 31. The filling layer 40 fills the first straight section 1111 and the first bending section 1112, so that the corner positions can be well pressed in the pressing stage. Further, the filling layer 40 is disposed on the blank region 112, so that the flatness of the battery cell 100 can be maintained, and the safety performance of the battery cell 100 can be improved.
In some embodiments, the filler layer 40 may be disposed on a surface of the first flat section 1111. It is also possible to fill in the difference in thickness between the innermost layer of the first pole piece 10 and the innermost layer of said second pole piece 30.
When the battery cell 100 is pressed, the filling layer 40 fills a difference portion between the first pole piece 10 and the second pole piece 30, so that the battery cell 100 avoids a situation of poor end filling.
The first tab 13 and the second tab 33 are fixed on the current collector by an adhesive 50, and it is understood that in other embodiments, the first tab 13 and the second tab 33 may also be fixed with the current collector by an electrical connection manner. The wound ends of the first pole piece 10, the separator 20, and the second pole piece 30 are fixed by the adhesive 50.
In one embodiment, the filling layer 40 is formed by directly extending the first diaphragm portion 121 of the first diaphragm 12. It is understood that, in other embodiments, the filling layer 40 may also be a ceramic slurry formed of an inorganic substance, and the ceramic slurry is coated at the position of the blank region 112 of the first current collector 11.
In another embodiment, the present application further provides a battery (not shown), where the battery includes the battery cell 100 described above, and the battery further includes a casing (not shown), and the battery cell 100 is housed inside the casing. The battery can be applied to digital products, mobile terminals and electric devices, such as cameras, mobile phones and the like.
Second embodiment
Referring to fig. 3, the battery cell 100 of the second embodiment is substantially the same as the battery cell 100 of the first embodiment, except that in the second embodiment, at the starting end 311 of the second current collector 31, a portion of the surface of the starting end 311 is not provided with the second film 32, so as to form a partial blank current collector, which can improve the energy density of the battery cell 100.
Third embodiment
Referring to fig. 4, a battery cell 100 of the third embodiment is substantially the same as that of the first embodiment, except that in the third embodiment, the blank region 112 of the first current collector 11 includes a second straight section 1121 opposite to the first straight section 1111 and a second bent section 1122 opposite to the first bent section 1112, and the second straight section 1121 and the second bent section 1122 are connected.
Specifically, the second straight portion 1121 and the second bent portion 1122 of the blank region 112 are located at the starting end of the second diaphragm portion 122. The first straight section 1111 is substantially parallel to the second straight section 1121 and has substantially the same length. The second bent portion 1122 is an area between an end of the second straight portion 1121 and a start of the second diaphragm portion 122.
The filling layer 40 is disposed on the first flat section 1111 and the first bent section 1112, and also disposed on the second flat section 1121 and the second bent section 1122. The sum of the thickness of the filling layer 40 on the first flat section 1111 and the thickness of the filling layer 40 on the second flat section 1121 is substantially the same as the thickness of the filling layer 40 on the first flat section 1111 in the first embodiment. When the battery cell 100 is pressed, the filling layer 40 in the third embodiment may also achieve the same effect as that in the first embodiment.
In some embodiments, the filling layer 40 may be disposed on the second straight section 1121, and the second bent section 1122 is not disposed with the filling layer 40.
Fourth embodiment
Referring to fig. 5, the battery cell 100 of the fourth embodiment is substantially the same as the third embodiment, except that in the fourth embodiment, at the starting end 311 of the second current collector 31, a portion of the surface of the starting end 311 is not provided with the second film 32, so as to form a partial blank current collector, which can improve the energy density of the battery cell 100.
Fifth embodiment
Referring to fig. 6, a battery cell 100 of the fifth embodiment is substantially the same as that of the fourth embodiment, except that in the fifth embodiment, the filling layer 40 is disposed on the first straight section 1111 and the second straight section 1121, and the filling layer 40 is not disposed on the first bent section 1112 and the second bent section 1122. In the lamination stage of the battery cell 100, the filling layer 40 disposed on the first flat section 1111 and the second flat section 1121 can also fill up a difference portion between the first pole piece 10 and the second pole piece 30, so that the battery cell 100 avoids a situation of poor end filling.
Sixth embodiment
Referring to fig. 7, a battery cell 100 of the sixth embodiment is substantially the same as that of the first embodiment, except that in the sixth embodiment, the first current collector 11 further includes a tail end 113, and the tail end 113 is provided with the blank region 112. The trailing end 113 includes a third straight section 1131 and a third bent section 1132, and the third bent section 1132 is connected to the third straight section 1131.
The filling layer 40 is disposed on the surfaces of the third straight section 1131 and the third bent section 1132.
Specifically, at the position of the terminating end 113 of the first current collector 11, the first membrane 12 is not disposed on the two opposite surfaces of the first current collector 11. The filling layer 40 is simultaneously disposed on two surfaces of the first current collector 11, that is, the initial end of the filling layer 40 is connected to the tail ends of the first membrane portion 121 and the second membrane portion 122 respectively. The filling layer 40 disposed on the third straight section 1131 fills the thickness difference between the first pole piece 10 and the second pole piece 30.
In some embodiments, the filling layer 40 may be disposed only on the third straight section 1131, and the third bent section 1132 is replaced by disposing the first diaphragm portion 121 and the second diaphragm portion 122 on the two opposite surfaces of the first current collector 11.
Seventh embodiment
Referring to fig. 8, the battery cell 100 of the seventh embodiment is substantially the same as that of the sixth embodiment, except that in the seventh embodiment, at the position of the start end 311 of the second current collector 31, the second film 32 is not disposed on a part of the surface of the start end 311, so as to form a partial blank current collector, which can improve the energy density of the battery cell 100.
In addition, in the sixth embodiment, the filling layer 40 provided on the third bending portion 1132 is fixed by winding the second pole piece 30. In this embodiment, the adhesive 50 is disposed on the outer surface of the filling layer 40 disposed on the third bending portion 1132, and the stability of the filling layer 40 can be improved by fixing the adhesive 50.
To sum up, the electric core that this application provided and the battery that adopts this electric core through set up the filling layer in blank region to it can the pressurized evenly to solve first pole piece and second pole piece in the formation stage. Simultaneously, set up first utmost point ear at the middle part of first pole piece, the second utmost point ear sets up the middle part at the second pole piece, can improve the charge-discharge efficiency of electric core.
In addition, those skilled in the art should recognize that the foregoing embodiments are illustrative only, and not limiting, and that appropriate changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A cell, comprising:
the first pole piece comprises a first current collector, a first membrane and a first tab electrically connected with the first current collector, wherein the first membrane is arranged on the surface of the first current collector, and the first current collector comprises a blank area without the first membrane;
a diaphragm; and
the second pole piece comprises a second current collector, a second diaphragm and a second pole lug connected with the second current collector, the second diaphragm is arranged on the surface of the second current collector, and the first pole piece, the diaphragm and the second pole lug are wound to form the battery core;
the current collector is characterized in that the first tab is arranged in the middle of the first current collector in the length direction of the first current collector, and the second tab is arranged in the middle of the second current collector in the length direction of the second current collector;
the battery cell further comprises a filling layer, and the filling layer is arranged on the surface of the blank area.
2. The battery cell of claim 1, wherein the starting end of the first current collector is provided with the blank region, the starting end comprises a first straight section and a first bent section connected with the first straight section, and the filling layer is disposed on a surface of the first straight section.
3. The cell of claim 2, wherein the filler layer is disposed on a surface of the first straight segment and the first bent segment.
4. The cell of claim 3, wherein the void region of the first current collector comprises a second straight segment opposite the first straight segment and a second bent segment opposite the first bent segment, the second straight segment and the second bent segment being connected, and the filler layer being disposed on a surface of the second straight segment.
5. The cell of claim 4, wherein the filler layer is disposed on a surface of the second straight segment and the second bent segment.
6. The cell of claim 4, wherein the filler layer is disposed on a surface of the first and second straight segments.
7. The battery cell of claim 1, wherein a final section of the first current collector is provided with the blank region, the final section comprises a third bent section and a third straight section connected to the third bent section, and the filling layer is disposed on a surface of the third straight section.
8. The cell of claim 7, wherein the filler layer is disposed on a surface of the third straight segment and the third bent segment.
9. The electric core of claim 1, wherein the first diaphragm is disposed on a surface of the starting end of the first current collector, the second diaphragm is disposed on a surface of the starting end of the second current collector, the first pole piece is an anode pole piece, and the second pole piece is a cathode pole piece.
10. The cell of any one of claims 1 to 9, wherein the filler layer does not overlap the second membrane at the beginning of the second pole piece in the thickness direction of the cell.
11. A battery comprising a casing and a cell housed within the casing, wherein the cell is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020449774.3U CN211455865U (en) | 2020-03-31 | 2020-03-31 | Battery cell and battery adopting same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020449774.3U CN211455865U (en) | 2020-03-31 | 2020-03-31 | Battery cell and battery adopting same |
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| CN211455865U true CN211455865U (en) | 2020-09-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563560A (en) * | 2021-02-23 | 2021-03-26 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method for manufacturing battery cell |
| CN113314697A (en) * | 2021-05-27 | 2021-08-27 | 珠海冠宇电池股份有限公司 | Battery core and battery |
| CN113782805A (en) * | 2021-08-27 | 2021-12-10 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114188591A (en) * | 2021-11-19 | 2022-03-15 | 宁德新能源科技有限公司 | Battery cell, battery and electronic equipment |
-
2020
- 2020-03-31 CN CN202020449774.3U patent/CN211455865U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563560A (en) * | 2021-02-23 | 2021-03-26 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method for manufacturing battery cell |
| CN112563560B (en) * | 2021-02-23 | 2021-05-18 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method for manufacturing battery cell |
| CN113314697A (en) * | 2021-05-27 | 2021-08-27 | 珠海冠宇电池股份有限公司 | Battery core and battery |
| CN113782805A (en) * | 2021-08-27 | 2021-12-10 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114188591A (en) * | 2021-11-19 | 2022-03-15 | 宁德新能源科技有限公司 | Battery cell, battery and electronic equipment |
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