CN115241608B - Current collecting plate and cylindrical lithium battery - Google Patents
Current collecting plate and cylindrical lithium battery Download PDFInfo
- Publication number
- CN115241608B CN115241608B CN202211002083.9A CN202211002083A CN115241608B CN 115241608 B CN115241608 B CN 115241608B CN 202211002083 A CN202211002083 A CN 202211002083A CN 115241608 B CN115241608 B CN 115241608B
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- China
- Prior art keywords
- connecting piece
- current collector
- notch
- pole group
- collecting plate
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000007769 metal material Substances 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 abstract description 11
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/673—Containers for storing liquids; Delivery conduits therefor
- H01M50/682—Containers for storing liquids; Delivery conduits therefor accommodated in battery or cell casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a current collecting plate and a cylindrical lithium battery, wherein the current collecting plate comprises a top and a bottom, the top and the bottom are round, the top is wound with a notch and a connecting piece by taking a circle center as a reference, the bottom is connected with a battery pole group, the notch is used for guiding liquid to the battery pole group, the connecting piece is used for connecting with the battery pole group, and the connecting piece is formed by recessing from the top to the bottom; the notch and the connecting piece are in spiral line shape, and the notch and the connecting piece are distributed at intervals. In the lithium battery liquid injection process, the current collecting plate can form the liquid injection channel which is diffused around the central spiral line shape through the spiral line-shaped notch, so that the electrolyte can be quickly permeated, the consistency of electrolyte permeation of electrode plate points is effectively improved, the liquid injection time is reduced, and the product quality is further improved. Furthermore, the connecting piece with the spiral line shape is connected with the battery pole group, so that the internal resistance of the battery pole group is reduced, the output current of the battery can be improved, the internal heating is reduced, and the safety is improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a current collecting plate and a cylindrical lithium battery.
Background
Batteries, particularly lithium batteries, are being developed at a high speed with the development of economy and society. The lithium battery has wide application prospect in the aspects of electric vehicle power supply and energy storage. The current cylindrical battery comprises a battery shell and a current collecting plate arranged at the end part of the battery pole group, wherein a plurality of liquid guide holes are formed in the current collecting plate and used for enabling electrolyte to permeate the battery pole group, however, liquid is guided through the liquid guide holes of the current collecting plate, and the current collecting causes that an area (especially a non-hole area) below the current collecting plate cannot be permeated by the electrolyte at the first time, especially the welding position of the current collecting plate and the battery pole group is below, the electrolyte permeation consistency is poor, and the liquid injection time is long. In addition, the conventional welding of the current cylindrical current collecting plate and the battery pole group is linear welding, the internal resistance of the battery pole group is still higher, the charge and discharge performance of the battery is affected, and the pole group and the current collecting plate are easy to be unwelded in the charge and discharge process.
Disclosure of Invention
The embodiment of the invention provides a current collecting plate and a cylindrical lithium battery, which are used for solving the problems of poor electrolyte permeation consistency and high resistance in a battery pole group.
In order to solve the technical problems, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a current collecting plate, where the current collecting plate is configured to be disposed on a battery pole group, the current collecting plate includes a top and a bottom, the top and the bottom are both circular, the top is wound with a notch and a connecting piece with reference to a circle center, the bottom is connected with the battery pole group, the notch is used for guiding a liquid to the battery pole group, the connecting piece is used for connecting with the battery pole group, and the connecting piece is formed by recessing from the top to the bottom; the notch and the connecting piece are in spiral line shapes, and the notch and the connecting piece are distributed at intervals.
The invention is further provided with: the top comprises a central area and a non-central area, the notch is formed by taking a spiral line equation track as the width central line of the notch, and taking the track part of the non-central area to remove the metal material of the current collecting plate at equal width.
The invention is further provided with: the connecting piece takes the spiral line equation track as the width central line of the connecting piece, and the metal material of the current collecting plate is stamped by taking the track part of the non-central area to form the connecting piece in a constant width mode.
The invention is further provided with: the depth of the groove formed by the connecting piece is larger than the thickness of the current collecting plate.
The invention is further provided with: the top is formed with a cutting seam, the cutting seam is a non-closed loop curve, and the cutting seam surrounds and is equidistantly offset beside the connecting piece.
The invention is further provided with: the rotation directions of the notch and the connecting piece are the same; wherein the rotation direction of the notch and the connecting piece is clockwise or anticlockwise.
The invention is further provided with: the current collecting plate is a negative current collecting plate, and the top is provided with a central hole.
The invention is further provided with: the top is also provided with a positioning hole.
In a second aspect, an embodiment of the present invention provides a cylindrical lithium battery, including the current collecting plate described above.
Compared with the prior art, the invention has the beneficial effects that: a current collecting plate and a cylindrical lithium battery are provided. In the lithium battery liquid injection process, the current collecting plate can form the liquid injection channel which is diffused around the central spiral line shape through the spiral line-shaped notch, so that the electrolyte can be quickly permeated, the consistency of electrolyte permeation of electrode plate points is effectively improved, the liquid injection time is reduced, and the product quality is further improved. Furthermore, the connecting piece with the spiral line shape is connected with the battery pole group, so that the internal resistance of the battery pole group is reduced, the output current of the battery can be improved, the internal heating is reduced, and the safety is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic view illustrating a top portion of a current collecting plate according to an embodiment of the present invention.
Fig. 2 is a schematic view illustrating a structure of a bottom of a current collecting plate according to an embodiment of the present invention.
Fig. 3 is a schematic view illustrating a top portion of a current collecting plate according to another embodiment of the present invention.
Fig. 4 is a schematic view of the structure of the central area and the non-central area of a current collecting plate according to an embodiment of the present invention.
In the figure: 1. a top; 11. a notch; 12. a connecting piece; 13. cutting the seam; 14. a central bore; 15. positioning holes; 2. a bottom; 100. a current collecting plate; A. a central region; B. a non-central region.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 1 to 3, the present invention provides a current collecting plate 100, wherein the current collecting plate 100 is configured to be disposed on a battery pole group, and is characterized in that the current collecting plate 100 includes a top 1 and a bottom 2, the top 1 and the bottom 2 are both circular, the top 1 is provided with a notch 11 and a connecting piece 12 around a circle center, the bottom 2 is connected with the battery pole group, the notch 11 is configured to guide liquid to the battery pole group, the connecting piece 12 is configured to be connected with the battery pole group, and the connecting piece 12 is formed by recessing from the top 1 to the bottom 2; the notch 11 and the connecting piece 12 are in spiral line shapes, and the notch 11 and the connecting piece 12 are distributed at intervals.
Specifically, the connecting member 12 forms a groove, one end of the connecting member 12 recessed toward the bottom 2 is welded to the battery pole group, and the number of the connecting member 12 and the notch 11 can be adjusted according to practical situations, for example, the number of the connecting member 12 and the notch 11 can be changed according to the change of the outer diameter of the current collecting plate 100, for example, the number of the spiral line connecting member 12 and the notch 11 in fig. 1 is 1, for example, the number of the spiral line connecting member 12 and the notch 11 in fig. 3 is 2, so that no limitation is made herein. Meanwhile, in the embodiment, the battery pole group is wound in a spiral line, and the curve of the welding part is set to be the spiral line, so that radial expansion stress generated in the electrode charging and discharging process is relieved, and the welding is prevented.
Referring to fig. 4, the top 1 includes a central area a and a non-central area B, the notch 11 is a notch 11 formed by taking a spiral line equation track as a width center line of the notch 11, and removing a metal material of the current collecting plate 100 by taking a track portion of the non-central area B with equal width.
Specifically, the range of the central area a may be adjusted according to the actual situation, and is not limited herein. As shown in fig. 2, the notch 11 may be hollowed out to the middle or to the central area a or to the non-central area B. The notch 11 is hollow with respect to the current collector plate 100. In addition, in the spiral line equation, the radius r is a variable parameter with the circle center as a reference. Wherein, plane Cartesian coordinate equation of Archimedes spiral is: x= (α+βθ) cos θ; y= (α+βθ) sinθ. An archimedean spiral is a trajectory produced by a point moving away from a fixed point at a constant speed while rotating around the fixed point at a fixed angular velocity. The shape of the gap 11 may be varied according to the change in the parameters of the spiral equation, and the width of the gap 11 may also be varied according to the liquid flow characteristics, as in fig. 1 the gap 11 width is chosen to be 2mm. Of course, the width of the notch 11 may be adjusted according to practical situations, and is not limited herein.
Referring to fig. 4, the connecting member 12 is formed by stamping the metal material of the current collecting plate 100 with equal width from the track portion of the non-central area B by using the spiral line equation track as the width center line of the connecting member 12.
Specifically, as shown in fig. 2, the connecting member 12 is a bump with respect to the base 2, and the bump is welded to the battery pole group. The trajectory of the connector 12 is calculated in the same manner as the notch 11, wherein the shape of the connector 12 may be varied according to the change in the parameters of the spiral equation, and the width of the connector 12 may also be varied according to the size of the welding spot, as in fig. 1 the width of the connector 12 is selected to be 2mm. Of course, the width of the connecting member 12 may be adjusted according to practical situations, and is not limited herein.
Referring to fig. 2, the depth of the recess formed by the connecting member 12 is greater than the thickness of the current collecting plate 100.
Specifically, the depth of the recess of the connection member 12 from the top 1 to the bottom 2 is greater than the thickness of the current collecting plate 100, so that the connection member 12 is easily welded to the battery pole group.
Referring to fig. 1 and 3, the top 1 is formed with a cutting slit 13, the cutting slit 13 is a non-closed loop curve, and the cutting slit 13 surrounds and is equidistantly offset beside the connecting member 12.
Specifically, the cutting slit 13 is used to ensure that the spiral wire connecting piece 12 has a flexible deformation, i.e. the connecting piece 12 has a certain free space distance from the cutting slit 13, so as to prevent welding and welding off. Wherein the width of the slit 13 is 5mm in the schematic drawing. Of course, the width of the cutting slit 13 may be adjusted according to practical situations, and is not limited herein.
Referring to fig. 1, the rotation directions of the notch 11 and the connecting piece 12 are the same; wherein the rotation direction of the notch 11 and the connecting piece 12 is clockwise or anticlockwise.
The direction of rotation of the connector 12 and the groove is clockwise as shown in fig. 1.
Referring to fig. 1 to 3, the current collecting plate 100 is a negative current collecting plate 100, and the top 1 is provided with a central hole 14.
Specifically, the center hole 14 or the non-center hole 14 can be arranged according to the positive and negative polarities of the battery pole group, the negative electrode is provided with the center hole 14, and the positive electrode is provided with the non-center hole 14. In this embodiment, the central aperture 14 facilitates insertion of the solder pin into the cell, facilitating electrolyte penetration.
Referring to fig. 1 to 3, the top 1 is further provided with a positioning hole 15.
In particular, there are 2 positioning holes 15 as shown in fig. 1 and 3 for circumferential positioning purposes.
Further, the current collecting plate 100 is made of a material with good conductivity, such as aluminum, nickel, copper or alloy.
In this embodiment, the present invention also provides a cylindrical lithium battery (not shown in the drawings) including the above-described current collecting plate 100.
In summary, compared with the prior art, the invention has the following beneficial effects: a current collecting plate 100 and a cylindrical lithium battery are provided. In the process of filling the lithium battery, the current collecting plate 100 can form a filling channel which is diffused around the central spiral line shape through the spiral line-shaped notch 11, so that the electrolyte can be quickly permeated, the consistency of electrolyte permeation of electrode plate points is effectively improved, the time consumption of filling is reduced, and the product quality is further improved. Furthermore, the connecting piece 12 with the spiral line shape is connected with the battery pole group, so that the internal resistance of the battery pole group is reduced, the output current of the battery can be improved, the internal heating is reduced, and the safety is further improved. Meanwhile, the battery pole group is wound in a spiral line mode, so that the curve of the welding part is set to be a spiral line, radial expansion stress generated in the electrode charging and discharging process is relieved, and further the welding is prevented.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (8)
1. The current collecting plate is arranged on the battery pole group and is characterized by comprising a top and a bottom, wherein the top and the bottom are round, the top is wound with a notch and a connecting piece by taking a circle center as a reference, the bottom is connected with the battery pole group, the notch is used for conducting liquid to the battery pole group, the connecting piece is used for being connected with the battery pole group, and the connecting piece is formed by sinking from the top to the bottom; the notch and the connecting piece are in spiral line shapes, and are distributed at intervals;
the top is formed with a cutting seam, the cutting seam is a non-closed loop curve, and the cutting seam surrounds and is equidistantly offset beside the connecting piece.
2. A current collector as in claim 1 wherein said top portion comprises a central region and a non-central region, said gap being a gap formed by taking the trajectory of the spiral line equation as the center line of the width of said gap, taking the trajectory portion of said non-central region to remove the metallic material of said current collector at equal widths.
3. A current collector as claimed in claim 2 wherein said connector is a connector formed by stamping the metallic material of said current collector with equal width from the track portion of said non-central region using a spiral line equation track as the width centerline of said connector.
4. A current collector as in claim 1, wherein the connecting member defines a recess having a depth greater than a thickness of the current collector.
5. A current collector as in claim 1 wherein the notches and the connector rotate in the same direction; wherein the rotation direction of the notch and the connecting piece is clockwise or anticlockwise.
6. A current collector as in claim 1 wherein the current collector is a negative current collector and the top is provided with a central aperture.
7. A current collector as in claim 1 wherein said top portion is further provided with locating holes.
8. A cylindrical lithium battery comprising a current collector plate according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002083.9A CN115241608B (en) | 2022-08-20 | 2022-08-20 | Current collecting plate and cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002083.9A CN115241608B (en) | 2022-08-20 | 2022-08-20 | Current collecting plate and cylindrical lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115241608A CN115241608A (en) | 2022-10-25 |
| CN115241608B true CN115241608B (en) | 2024-03-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211002083.9A Active CN115241608B (en) | 2022-08-20 | 2022-08-20 | Current collecting plate and cylindrical lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115241608B (en) |
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| CN107611329A (en) * | 2017-09-18 | 2018-01-19 | 华霆（合肥）动力技术有限公司 | Battery welding device and battery modules |
| CN207149616U (en) * | 2017-09-18 | 2018-03-27 | 华霆（合肥）动力技术有限公司 | Battery welding device and battery modules |
| CN208284552U (en) * | 2018-06-01 | 2018-12-25 | 苏州安靠电源有限公司 | The uniform end face weld battery of fluid injection |
| CN111081966A (en) * | 2019-11-21 | 2020-04-28 | 国轩新能源(庐江)有限公司 | Lithium ion cylindrical battery and processing method thereof |
| CN114512673A (en) * | 2020-10-29 | 2022-05-17 | 深圳市比克动力电池有限公司 | Collector plate and cylindrical lithium battery |
| KR102420876B1 (en) * | 2021-08-20 | 2022-07-14 | 주식회사 유로셀 | Jelly roll and current collector plate assembly for secondary cell |
| CN114695855A (en) * | 2022-03-24 | 2022-07-01 | 湘潭大学 | Lithium/titanium co-doped sodium ion battery composite cathode material and preparation method and application thereof |
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