CN219040509U - Battery pole piece welding structure, lithium battery cell and lithium battery - Google Patents
Battery pole piece welding structure, lithium battery cell and lithium battery Download PDFInfo
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- CN219040509U CN219040509U CN202222313135.6U CN202222313135U CN219040509U CN 219040509 U CN219040509 U CN 219040509U CN 202222313135 U CN202222313135 U CN 202222313135U CN 219040509 U CN219040509 U CN 219040509U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery pole piece welding structure, a lithium battery cell and a lithium battery, wherein the battery pole piece welding structure comprises a pole piece, the end part of the pole piece is provided with a bending part, the bending part forms an upper pole piece on the pole piece, and a pole lug is welded on the upper pole piece; the lithium battery cell comprises a pole piece, a pole lug and a diaphragm, wherein the pole piece comprises a positive pole piece and a negative pole piece, the pole lug comprises a positive pole lug and a negative pole lug, the positive pole piece, the negative pole piece and the diaphragm are wound into a cell main body, the last piece of the positive pole piece is a positive pole bending part and the positive pole bending part is bent to form a positive pole upper pole piece of the positive pole piece, the last piece of the negative pole piece is a negative pole bending part and the negative pole bending part is bent to form a negative pole upper pole piece of the negative pole piece, the positive pole lug is welded on the upper surface of the positive pole upper pole piece, and the negative pole lug is welded on the negative pole upper pole piece. The battery pole piece welding structure, the lithium battery cell and the lithium battery can eliminate the adverse effect of welding heat on the pole piece, eliminate potential safety hazard and improve the product quality.
Description
Technical Field
The utility model relates to the field of lithium battery production and processing, in particular to a battery pole piece welding structure, a lithium battery cell and a lithium battery.
Background
In the prior tab laser welding process, the stable welding of the single-side coated pole piece and the tab is successfully realized, and the breadth utilization rate of the pole piece can be improved. However, the laser directly welds the tab and the back-coated pole piece, and the damage of the welding heat influence to the coating layer cannot be eliminated objectively and thoroughly. Because the penetration of laser welding can fluctuate and the fluctuation range is larger than the thickness of the pole piece. In order to be able to weld stably and effectively, the weld pool must have a probability of penetration into the back-side coating. Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an existing tab welded on a pole piece, and fig. 2 is a schematic structural diagram of a coating of a pole piece damaged by heat influence of a welding pool after the existing tab is welded on the pole piece. In fig. 1 and 2, after the tab 80 is welded to the pole piece 90, a molten pool during welding may invade the coating 70 on the back surface of the pole piece 90, thereby affecting quality. Specifically, after the positive electrode coating is affected, free lithium ions are reduced, the battery performance is slightly reduced locally, and the influence is not great; after the negative electrode coating is affected, holes are reduced, free lithium ions cannot be fixed, and therefore lithium precipitation is caused, and further short circuit risks are likely to occur. Therefore, the process of directly welding the tab and coating the back surface with the electrode sheet by laser has a barrier when applied to the cathode.
Accordingly, the present utility model is directed to a new solution to solve the existing technical drawbacks.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a battery pole piece welding structure, a lithium battery cell and a lithium battery, and the technical defects that the welding heat influence is great in damage to a pole piece coating, the production quality of the pole piece and the cell is influenced, potential safety hazards exist and the like when pole pieces are welded to pole lugs are effectively overcome.
The technical scheme adopted for solving the technical problems is as follows:
the battery pole piece welding structure comprises a pole piece, wherein the end part of the pole piece is provided with a bending part, the bending part forms an upper pole piece on the pole piece, and a pole lug is welded on the upper pole piece.
As an improvement of the technical scheme, the part of the pole piece, which is attached to the upper pole piece, is a lower pole piece, and the back surface of the upper pole piece is attached to the upper surface of the lower pole piece.
As a further improvement of the technical scheme, the part of the pole piece, which is attached to the upper pole piece, is a lower pole piece, the two surfaces of the upper pole piece of the pole piece are non-coated surfaces, the upper surface of the lower pole piece is a non-coated surface, the back surface of the lower pole piece is a coated surface, and the coated surface of the lower pole piece is coated with a coating.
As a further improvement of the technical scheme, the upper surface of the upper pole piece of the pole piece is provided with a welding area, and the pole lugs are welded on the welding area.
As a further improvement of the technical scheme, the part of the pole piece, which is attached to the upper pole piece, is a lower pole piece, and other areas of the pole piece except the upper pole piece and the lower pole piece are coated with a coating on one side or two sides.
As a further improvement of the technical scheme, the electrode lug is directly welded on the upper electrode plate of the electrode plate by adopting laser welding equipment.
As a further improvement of the technical scheme, the electrode lugs are welded on the pole pieces to form welding tracks, and the welding tracks are one of spiral point type, sine line type and secondary sine line type.
The utility model also provides:
the lithium battery cell comprises a pole piece, a pole lug and a diaphragm, wherein the pole piece is provided with the battery pole piece welding structure.
The utility model also provides:
the utility model provides a lithium battery cell, lithium battery cell includes pole piece, utmost point ear and diaphragm, the pole piece includes positive pole piece and negative pole piece, the utmost point ear includes positive pole ear and negative pole ear, positive pole piece, negative pole piece and diaphragm are convoluteed into the cell main part, the last piece of positive pole piece be anodal kink just anodal kink is buckled and is formed the positive pole upper pole piece of positive pole piece, the last piece of negative pole piece be negative pole kink just negative pole kink is buckled and is formed the negative pole upper pole piece of negative pole piece, positive pole ear welding is in positive upper pole piece upper surface, negative pole ear welding is in on the negative pole upper pole piece.
As an improvement of the technical scheme, the part of the positive plate, which is attached to the positive upper electrode plate, is a positive lower electrode plate, and the back surface of the positive upper electrode plate is attached to the upper surface of the positive lower electrode plate;
the part of the negative electrode plate, which is attached to the negative electrode upper electrode plate, is a negative electrode lower electrode plate, and the back surface of the negative electrode upper electrode plate is attached to the upper surface of the negative electrode lower electrode plate.
As a further improvement of the technical scheme, the part of the positive plate, which is attached to the positive upper plate, is a positive lower plate, both sides of the positive upper plate of the positive plate are non-coating surfaces, the upper surface of the positive lower plate is a non-coating surface, the back surface of the positive lower plate is a coating surface, and the coating surface of the positive lower plate is coated with a positive coating;
the part of the negative electrode plate, which is attached to the negative electrode upper electrode plate, is a negative electrode lower electrode plate, the two surfaces of the negative electrode upper electrode plate of the negative electrode plate are non-coating surfaces, the upper surface of the negative electrode lower electrode plate is a non-coating surface, the back surface of the negative electrode lower electrode plate is a coating surface, and a negative electrode coating is coated on the coating surface of the negative electrode lower electrode plate.
As a further improvement of the technical scheme, the upper surface of the positive electrode plate is provided with a positive electrode welding area, and the positive electrode lug is welded on the positive electrode welding area;
the upper surface of the upper electrode plate of the negative electrode plate is provided with a negative electrode welding area, and the negative electrode lug is welded on the negative electrode welding area;
as a further improvement of the technical scheme, the part of the positive plate, which is attached to the positive upper electrode plate, is a positive lower electrode plate, and other areas of the positive plate except the positive upper electrode plate and the positive lower electrode plate are coated with positive coating on one side or two sides;
the part of the negative electrode plate, which is attached to the negative electrode upper electrode plate, is a negative electrode lower electrode plate, and other areas of the negative electrode plate except the negative electrode upper electrode plate and the negative electrode lower electrode plate are coated with a negative electrode coating on one side or two sides.
As a further improvement of the technical scheme, the positive electrode lug is directly welded on the positive electrode upper layer pole piece of the positive electrode piece by adopting laser welding equipment;
the negative electrode lug is directly welded on a negative electrode upper layer pole piece of the negative electrode piece by adopting laser welding equipment.
As a further improvement of the technical scheme, the positive electrode lug is welded on the positive electrode plate to form a positive electrode welding track, and the positive electrode welding track is one of a spiral point type, a sine line type and a secondary sine line type;
the negative electrode lug is welded on the negative electrode plate to form a negative electrode welding track, and the negative electrode welding track is one of a spiral point type, a sine line type and a secondary positive line type.
The utility model also provides:
the battery core adopted by the lithium battery comprises the battery pole piece welding structure or the lithium battery comprises the lithium battery core.
The beneficial effects of the utility model are as follows: the utility model provides a battery pole piece welding structure, a lithium battery cell and a lithium battery, wherein a bending part is arranged on a pole piece, so that the bending part forms an upper pole piece, and a pole lug is welded on the upper pole piece.
In conclusion, the battery pole piece welding structure, the lithium battery cell and the lithium battery effectively solve the technical defects that when pole pieces are welded to pole lugs, welding heat influence is large in damage to pole piece coating, production quality of the pole pieces and the cell is influenced, potential safety hazards exist and the like.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of a prior art tab welded to a pole piece;
FIG. 2 is a schematic diagram of a structure of a coating of a pole piece damaged by heat influence of a welding pool after a pole piece is welded by a pole lug in the prior art;
FIG. 3 is a schematic structural view of a welding structure of a battery pole piece in the present utility model;
FIG. 4 is a schematic cross-sectional view of a weld pool in a battery pole piece welding structure according to the present utility model;
FIG. 5 is a schematic view of three welding tracks when a pole piece and a pole lug are welded;
fig. 6 is a schematic structural diagram of a lithium battery cell according to the present utility model.
Detailed Description
The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all the coupling/connection relationships referred to in the patent are not direct connection of the single-finger members, but rather, it means that a better coupling structure can be formed by adding or subtracting coupling aids depending on the specific implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict, and refer to figures 2-6.
Referring specifically to fig. 3 and 4, fig. 3 is a schematic structural view of a welding structure of a battery pole piece according to the present utility model, and fig. 4 is a schematic sectional view of a welding pool in the welding structure of the battery pole piece according to the present utility model.
The utility model relates to a battery pole piece welding structure, which comprises a pole piece 100, wherein the end part of the pole piece 100 is provided with a bending part, the bending part forms an upper pole piece 101 on the pole piece 100, a pole lug 200 is welded on the upper pole piece 101 of the upper pole piece 101, specifically, the upper surface of the upper pole piece 101 of the pole piece 100 is provided with a welding area, the pole lug 200 is welded on the welding area, specifically, in the embodiment, the pole lug 200 is directly welded on the welding area of the upper pole piece 101 of the pole piece 100 by adopting laser welding equipment, when the pole lug 300 is welded by adopting laser, a welding track is formed after the pole lug 200 is welded on the pole piece 100, and referring to FIG. 5, FIG. 5 is a schematic diagram of three welding tracks when the pole piece and the pole lug are welded; in fig. 5, the welding track is one of a spiral point type, a sinusoidal line type and a secondary sinusoidal line type, wherein the left side in fig. 5 is a schematic diagram of the spiral point type welding track, the middle in fig. 5 is a schematic diagram of the sinusoidal line type welding track, and the right side in fig. 5 is a schematic diagram of the secondary sinusoidal line type welding track. Adopt above-mentioned three kind welding track can promote the welding steadiness, reduce the adverse effect that the welding heat influence brought simultaneously.
Further, the portion of the pole piece 100, which is abutted against the upper pole piece 101, is a lower pole piece 102, the back surface of the upper pole piece 101 is abutted against the upper surface of the lower pole piece 102, specifically, after the bending portion of the pole lug 100 is bent, the bending portion forms a double-layer pole lug structure at the pole piece 100, so that when the pole lug 200 is welded by the pole piece 100, the welding heat influence is isolated from the lower pole piece 102, the influence on the coating 300 on the back surface of the lower pole piece 102 is very little or not influenced, the production quality of the pole piece 100 can be guaranteed, and the potential safety hazard is effectively eliminated.
Specifically, the portion of the pole piece 100, which is abutted against the upper pole piece 101, is a lower pole piece 102, both sides of the upper pole piece 101 of the pole piece 100 are non-coated surfaces, the upper surface of the lower pole piece 102 is a non-coated surface, the back surface of the lower pole piece 102 is a coated surface, the coated surface of the lower pole piece 102 is coated with a coating 300, other areas of the pole piece 100 except for the upper pole piece 101 and the lower pole piece 102 are coated with the coating 300 on one side or both sides, in this embodiment, other areas of the pole piece 100 except for the upper pole piece 101 and the lower pole piece 102 are coated with the coating 300 on both sides, in other embodiments, other areas of the pole piece 100 except for the upper pole piece 101 and the lower pole piece 102 are coated with the coating 300 on one side, and the one side of the coating can be the front surface or the back surface of the pole piece 100, which is specifically determined according to the type and process requirements of the lithium battery.
Based on the battery pole piece welding structure, the utility model further provides:
the lithium battery cell comprises a pole piece 100, a pole lug 200 and a diaphragm, wherein the pole piece 100 is provided with the battery pole piece welding structure.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a lithium battery cell according to the present utility model, and the present utility model further provides, based on the above-mentioned welding structure of the battery pole piece:
the utility model provides a lithium battery cell, lithium battery cell includes pole piece 100, utmost point ear 200 and diaphragm, pole piece 100 includes positive pole piece 110 and negative pole piece 120, utmost point ear 200 includes positive pole ear 210 and negative pole ear 220, positive pole piece 110, negative pole piece 120 and diaphragm are convoluteed into the cell main part, the last piece of positive pole piece 110 is anodal kink just anodal kink the anodal kink is buckled and is formed positive pole piece 110's positive pole upper electrode piece 111, the last piece of negative pole piece 120 is negative pole kink just negative pole kink is buckled and is formed negative pole piece 120's negative pole upper electrode piece 121, anodal ear 210 welds positive pole upper electrode piece 111 upper surface, negative pole ear 220 welds on negative pole upper electrode piece 121.
Further, the portion of the positive electrode sheet 110, which is abutted against the positive electrode upper electrode sheet 111, is a positive electrode lower electrode sheet 112, and the back surface of the positive electrode upper electrode sheet 111 is abutted against the upper surface of the positive electrode lower electrode sheet 112; the part of the negative electrode sheet 120, which is abutted against the negative electrode upper electrode sheet 121, is a negative electrode lower electrode sheet 122, and the back surface of the negative electrode upper electrode sheet 121 is abutted against the upper surface of the negative electrode lower electrode sheet 122.
Further, the portion of the positive plate 110, which is abutted against the positive upper electrode sheet 111, is a positive lower electrode sheet 112, both sides of the positive upper electrode sheet 111 of the positive plate 110 are non-coated surfaces, the upper surface of the positive lower electrode sheet 112 is a non-coated surface, the back surface of the positive lower electrode sheet 112 is a coated surface, and the coated surface of the positive lower electrode sheet 112 is coated with a positive coating 310; the part of the negative electrode plate 120, which is abutted against the negative electrode upper electrode plate 121, is a negative electrode lower electrode plate 122, both sides of the negative electrode upper electrode plate 121 of the negative electrode plate 120 are non-coated surfaces, the upper surface of the negative electrode lower electrode plate 122 is a non-coated surface, the back surface of the negative electrode lower electrode plate 122 is a coated surface, and the coated surface of the negative electrode lower electrode plate 122 is coated with a negative electrode coating 320.
Further, the upper surface of the positive electrode upper layer pole piece 111 of the positive electrode piece 110 is provided with a positive electrode welding area, and the positive electrode lug 210 is welded on the positive electrode welding area; the upper surface of the negative electrode upper electrode plate 121 of the negative electrode plate 120 is provided with a negative electrode welding area, and the negative electrode lug 220 is welded on the negative electrode welding area.
Further, the portion of the positive plate 110, which is abutted against the positive upper electrode sheet 111, is a positive lower electrode sheet 112, and other areas of the positive plate 110 except for the positive upper electrode sheet 111 and the positive lower electrode sheet 112 are coated with a positive coating 310 on one side or both sides; the portion of the negative electrode sheet 120, which is abutted against the negative electrode upper electrode sheet 121, is a negative electrode lower electrode sheet 122, and other areas of the negative electrode sheet 120 except for the negative electrode upper electrode sheet 121 and the negative electrode lower electrode sheet 122 are coated with a negative electrode coating 320 on one side or both sides.
Further, the positive tab 210 is directly welded on the positive upper electrode sheet 111 of the positive electrode sheet 110 by using a laser welding device; the negative electrode tab 220 is directly welded on the negative electrode upper electrode sheet 121 of the negative electrode sheet 120 by laser welding equipment.
Further, the positive tab 210 forms a positive welding track after being welded on the positive plate 110, where the positive welding track is one of a spiral point type, a sinusoidal line type, and a secondary sinusoidal line type; the negative electrode tab 220 is welded on the negative electrode sheet 120 to form a negative electrode welding track, and the negative electrode welding track is one of a spiral point type, a sinusoidal line type and a secondary sinusoidal line type.
Based on the battery pole piece welding structure and the lithium battery core, the utility model further provides:
the battery core adopted by the lithium battery comprises the battery pole piece welding structure or the lithium battery comprises the lithium battery core.
While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications or substitutions are included in the scope of the present utility model as defined in the appended claims.
Claims (10)
1. A battery pole piece welding structure is characterized in that: the pole piece comprises a pole piece (100), wherein the end part of the pole piece (100) is provided with a bending part, an upper pole piece (101) is formed on the pole piece (100) by the bending part, and a pole lug (200) is welded on the upper pole piece (101).
2. The battery pole piece welding structure according to claim 1, wherein: the part of the pole piece (100) which is abutted against the upper pole piece (101) is a lower pole piece (102), and the back surface of the upper pole piece (101) is abutted against the upper surface of the lower pole piece (102);
the part of the pole piece (100) which is attached to the upper pole piece (101) is a lower pole piece (102), the two surfaces of the upper pole piece (101) of the pole piece (100) are non-coated surfaces, the upper surface of the lower pole piece (102) is a non-coated surface, the back surface of the lower pole piece (102) is a coated surface, and a coating (300) is coated on the coated surface of the lower pole piece (102).
3. The battery pole piece welding structure according to claim 1, wherein: the upper surface of the upper pole piece (101) of the pole piece (100) is provided with a welding area, and the pole lug (200) is welded on the welding area;
the part of the pole piece (100) which is attached to the upper pole piece (101) is a lower pole piece (102), and other areas of the pole piece (100) except the upper pole piece (101) and the lower pole piece (102) are coated with a coating (300) on one side or two sides.
4. The battery pole piece welding structure according to claim 1, wherein: the electrode lug (200) is directly welded on the upper electrode plate (101) of the electrode plate (100) by adopting laser welding equipment;
the electrode lug (200) is welded on the electrode plate (100) to form a welding track, and the welding track is one of a spiral point type, a sine line type and a secondary sine line type.
5. The utility model provides a lithium cell electricity core which characterized in that: comprises a pole piece (100), a pole lug (200) and a diaphragm, wherein the pole piece (100) is provided with the battery pole piece welding structure as claimed in any one of claims 1 to 4.
6. The utility model provides a lithium cell electricity core which characterized in that: including pole piece (100), utmost point ear (200) and diaphragm, pole piece (100) are including positive pole piece (110) and negative pole piece (120), utmost point ear (200) are including anodal ear (210) and negative pole ear (220), anodal piece (110), negative pole piece (120) and diaphragm are convoluteed into the electricity core main part, the last piece of anodal piece (110) is anodal kink just anodal kink is buckled and is formed anodal upper pole piece (111) of anodal piece (110), the last piece of negative pole piece (120) is negative pole kink just negative pole kink is buckled and is formed negative pole upper pole piece (121) of negative pole piece (120), anodal ear (210) welding is in anodal upper pole piece (111) upper surface, negative pole ear (220) welding is in on negative pole upper pole piece (121).
7. The lithium battery cell of claim 6, wherein: the part of the positive plate (110) which is abutted against the positive upper electrode plate (111) is a positive lower electrode plate (112), and the back surface of the positive upper electrode plate (111) is abutted against the upper surface of the positive lower electrode plate (112);
the part of the negative electrode plate (120) which is abutted against the negative electrode upper electrode plate (121) is a negative electrode lower electrode plate (122), and the back surface of the negative electrode upper electrode plate (121) is abutted against the upper surface of the negative electrode lower electrode plate (122);
the part of the positive plate (110) which is attached to the positive upper electrode plate (111) is a positive lower electrode plate (112), both sides of the positive upper electrode plate (111) of the positive plate (110) are non-coating surfaces, the upper surface of the positive lower electrode plate (112) is a non-coating surface, the back surface of the positive lower electrode plate (112) is a coating surface, and the coating surface of the positive lower electrode plate (112) is coated with a positive coating (310);
the part of the negative electrode plate (120) which is attached to the negative electrode upper electrode plate (121) is a negative electrode lower electrode plate (122), the two surfaces of the negative electrode upper electrode plate (121) of the negative electrode plate (120) are non-coating surfaces, the upper surface of the negative electrode lower electrode plate (122) is a non-coating surface, the back surface of the negative electrode lower electrode plate (122) is a coating surface, and a negative electrode coating (320) is coated on the coating surface of the negative electrode lower electrode plate (122).
8. The lithium battery cell of claim 6, wherein: the upper surface of a positive upper pole piece (111) of the positive plate (110) is provided with a positive welding area, and the positive lug (210) is welded on the positive welding area;
the upper surface of the negative electrode upper layer pole piece (121) of the negative electrode piece (120) is provided with a negative electrode welding area, and the negative electrode lug (220) is welded on the negative electrode welding area;
the part of the positive plate (110) which is attached to the positive upper pole piece (111) is a positive lower pole piece (112), and other areas of the positive plate (110) except the positive upper pole piece (111) and the positive lower pole piece (112) are coated with a positive coating (310) on one side or two sides;
the part of the negative electrode plate (120) which is attached to the negative electrode upper electrode plate (121) is a negative electrode lower electrode plate (122), and other areas of the negative electrode plate (120) except the negative electrode upper electrode plate (121) and the negative electrode lower electrode plate (122) are coated with a negative electrode coating (320) on one side or two sides.
9. The lithium battery cell of claim 6, wherein: the positive electrode lug (210) is directly welded on a positive electrode upper layer pole piece (111) of the positive electrode piece (110) by adopting laser welding equipment;
the negative electrode lug (220) is directly welded on a negative electrode upper layer pole piece (121) of the negative electrode piece (120) by adopting laser welding equipment;
the positive electrode lug (210) is welded on the positive electrode plate (110) to form a positive electrode welding track, and the positive electrode welding track is one of a spiral point type, a sine line type and a secondary sine line type;
the negative electrode lug (220) is welded on the negative electrode sheet (120) to form a negative electrode welding track, and the negative electrode welding track is one of a spiral point type, a sine line type and a secondary sine line type.
10. A lithium battery, characterized in that: the battery core adopted by the lithium battery comprises the battery pole piece welding structure of any one of claims 1-4 or the lithium battery comprises the lithium battery core of claim 5 or the lithium battery comprises the lithium battery core of any one of claims 6-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222313135.6U CN219040509U (en) | 2022-08-30 | 2022-08-30 | Battery pole piece welding structure, lithium battery cell and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222313135.6U CN219040509U (en) | 2022-08-30 | 2022-08-30 | Battery pole piece welding structure, lithium battery cell and lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN219040509U true CN219040509U (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222313135.6U Active CN219040509U (en) | 2022-08-30 | 2022-08-30 | Battery pole piece welding structure, lithium battery cell and lithium battery |
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| Country | Link |
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| CN (1) | CN219040509U (en) |
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