CN219959345U - Pole piece and battery comprising same - Google Patents
Pole piece and battery comprising same Download PDFInfo
- Publication number
- CN219959345U CN219959345U CN202321042027.8U CN202321042027U CN219959345U CN 219959345 U CN219959345 U CN 219959345U CN 202321042027 U CN202321042027 U CN 202321042027U CN 219959345 U CN219959345 U CN 219959345U
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- CN
- China
- Prior art keywords
- pole piece
- coating
- main body
- reinforcing
- pole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 35
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 238000005524 ceramic coating Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 229910001593 boehmite Inorganic materials 0.000 claims description 3
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 19
- 238000005452 bending Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a pole piece and a battery comprising the same, wherein the pole piece comprises a current collector and a pole lug, the pole lug comprises a main body part and a reinforcing part, the reinforcing part is arranged on two sides of the main body part and is integrally formed with the main body part, and a coating is coated on the surface of the reinforcing part. Through coating the coating on the reinforcing parts on two sides of the main body, the deflection and bending resistance of the whole pole piece can be improved under the conditions of not increasing the thickness of the pole lug and not damaging the flatness of the pole lug, and the winding and forming of the pole piece are facilitated.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a pole piece and a battery comprising the pole piece.
Background
At present, the battery core of the winding structure is concerned by high efficiency, and the negative electrode current collector is thinner and softer as a whole, so that the negative electrode tab is easy to bend in the winding process and is wound into the winding body, thus internal short circuit is caused, and safety risk is caused.
In order to improve the bending resistance of the electrode lugs, the width of the electrode lugs is increased, and the height of the electrode lugs is reduced, but the electrode lugs are limited by the design of the battery core, and some electrode lugs cannot be designed very widely. Or the strength of the tab is improved by adding the reinforcing ribs to the tab by punching, but the tab is worn to a certain extent by punching, and the surface of the tab becomes uneven by the reinforcing ribs, so that the subsequent ultrasonic welding and other working procedures are affected.
Disclosure of Invention
The utility model aims to solve the technical problems that the lug cannot be designed to be wider in some battery core structures, the problem that the lug is easy to bend cannot be solved, the strength of the lug is improved by forming a reinforcing rib through stamping the lug, the flatness of the lug is reduced, and the subsequent processing of the lug is influenced.
The utility model solves the technical problems by the following technical scheme:
the utility model provides a pole piece, which comprises a current collector and a pole lug, wherein the pole lug comprises a main body part and a reinforcing part, the reinforcing part is arranged on two sides of the main body part and is integrally formed with the main body part, and a coating is coated on the surface of the reinforcing part.
In the scheme, the reinforcing part and the main body part are integrally formed, the overall strength of the pole lug is high, the pole lug has good flatness and rigidity, and the deflection of the whole pole piece can be improved under the conditions that the thickness of the pole lug is not increased and the flatness of the pole lug is not damaged. Specifically, by coating the surface of the reinforcing portion with a coating, the main body portion can be supported, and the deflection of the entire pole piece can be improved. When the pole piece is wound, the reinforcing part and the coating arranged on the reinforcing part can reduce the possibility of bending the pole piece in the high-speed winding process.
Preferably, the side edge of the reinforcing part away from the main body part is an arc-shaped edge.
In this scheme, through setting the side of reinforcing part to the arc limit for reinforcing part and main part can smooth connection, can enough realize the support to main part, be difficult to influence the bending or winding of utmost point ear again.
Preferably, the arcuate edge is recessed towards one side of the body portion.
In this scheme, through setting up the arc limit of reinforcing part into to the one side of main part sunken for the reinforcing part has less overall structure, is difficult to influence the buckling or the winding of utmost point ear.
Preferably, the width of each of the reinforcing portions is not more than 1/5 of the width of the main body portion with the extending direction of the bottom edge of the main body portion as the width direction.
In this scheme, through the width of restriction reinforcing part, can avoid the pole piece when winding the tension roller, lead to the coating to break because of the reinforcing part is too wide.
Preferably, the height of the reinforcing part is 1/3-1/2 of the height of the main body part in a direction perpendicular to the bottom edge of the main body part.
In this scheme, through the height of restriction reinforcing part, can avoid the tab to lead to the broken pole piece core that falls into after the winding of coating when buckling, cause pole piece core short circuit.
Preferably, the coating is a ceramic coating.
In this scheme, adopt ceramic as the material of coating, can strengthen the rigidity of reinforcing part to realize the support to main part, further can prevent that whole utmost point ear from appearing buckling when the pole piece is convoluteed.
Preferably, the ceramic coating consists of aluminum oxide and boehmite.
Preferably, the thickness of the coating ranges from 30um to 100um.
In this scheme, through limiting the thickness of coating, prevent that the utmost point ear is too thick to exceed the thickness of pole piece. The pole pieces can be prevented from being clung to each other when being wound, so that gaps are formed between the pole pieces.
Preferably, the reinforcement has a first surface and a second surface in a thickness direction, and the coating is coated on the first surface and/or the second surface.
In this scheme, the strength of the reinforcing part can be improved by coating the coating on one side or both sides of the reinforcing part.
The utility model also provides a battery, which comprises a shell and a bare cell formed by the pole pieces.
The utility model has the positive progress effects that: through coating the coating on the reinforcing parts on two sides of the main body, the deflection and bending resistance of the whole pole piece can be improved under the conditions of not increasing the thickness of the pole lug and not damaging the flatness of the pole lug, and the winding and forming of the pole piece are facilitated.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
Reference numerals illustrate:
100 main body part
101 bottom edge
102 top edge
103 (104) side edge
105 weld area
200 reinforcing part
201 arc edge
300 current collector
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
As shown in fig. 1, the present embodiment provides a pole piece including a current collector 300 and a tab including a main body portion 100 and a reinforcing portion 200. In this embodiment, the main body portion 100 is a square structure having opposite bottom and top edges 101 and 102, and opposite side edges 103 and 104. The tab is connected to the current collector 300 through the bottom edge 101 of the body 100. The reinforcing portion 200 is provided on both side edges 103 and 104 of the body portion 100, and the reinforcing portion 200 is integrally formed with the body portion 100, and the surface of the reinforcing portion 200 is coated with a coating. The reinforcing portion 200 and the main body portion 100 are integrally formed, so that the overall strength of the tab is high, and the tab has good flatness and rigidity. The pole piece with the structure can improve the deflection of the whole pole piece under the conditions of not increasing the thickness of the pole lug and not damaging the flatness of the pole lug. Specifically, by coating the surface of the reinforcing portion 200 with a coating, the main body portion 100 can be supported, and the deflection of the entire pole piece can be improved. When the pole piece is wound, the reinforcing part 200 and the coating arranged on the reinforcing part 200 can reduce the possibility of bending the pole piece in the high-speed winding process, and the winding and forming of the pole piece are facilitated.
After the pole piece is wound, the pole lug needs to be bent, and the bent pole lug is welded on the pole post or the electric connecting piece to realize the electric connection of the pole lug. Specifically, as shown in fig. 1, the tab is bent along the dotted line in the figure to form a folded structure, and then the corresponding welding area 105 on the folded structure is ultrasonically welded to the pole or the electrical connector to achieve electrical connection. The side of the reinforcing portion 200 remote from the main body portion 100 is an arcuate edge 201. By arranging the side edges into the arc-shaped structure, the reinforcing part 200 and the main body part 100 can be smoothly connected, so that the main body part 100 can be supported, and bending or winding of the tab is not easily affected.
The arcuate edge 201 of the reinforcing portion 200 is recessed toward one side of the main body portion 100. By arranging the arc-shaped edge 201 of the reinforcing portion 200 to be recessed toward one side of the main body portion 100, the reinforcing portion 200 has a smaller overall structure, ultrasonic welding of the tab is not easily affected, and bending or winding of the tab is not easily affected.
The width of each reinforcing portion 200 is not more than 1/5 of the width of the main body portion 100 with the extending direction of the bottom edge 101 of the main body portion 100 as the width direction. By limiting the width of the reinforcing portion 200, it is possible to prevent the coating from being broken due to the reinforcing portion 200 being too wide when the pole piece is wound over the tension roller.
The height of the reinforcing portion 200 is 1/3 to 1/2 of the height of the main body portion 100 with the direction perpendicular to the bottom edge 101 of the main body portion 100 as the height direction. By limiting the height of the reinforcement 200, it is possible to prevent the pole tab from being broken and dropped into the wound pole piece winding core when bending, resulting in a short circuit of the pole piece winding core.
The coating is a ceramic coating. The ceramic coating is composed of aluminum oxide and boehmite. The ceramic is used as a material of the coating layer, so that the rigidity of the reinforcing portion 200 can be enhanced, the support of the main body portion 100 can be realized, and further, bending of the whole tab during pole piece winding can be prevented. After the tab is coated with the coating, heating is performed so that the ceramic is solidified on the surface of the reinforcing portion 200.
The thickness of the coating ranges from 30um to 100um. By defining the thickness of the coating, the tab is prevented from being too thick beyond the thickness of the pole piece. The pole pieces can be prevented from being clung to each other when being wound, so that gaps are formed between the pole pieces.
The reinforcement 200 has a first surface and a second surface in the thickness direction, and a coating is coated on the first surface and/or the second surface. By coating the coating on one side or both sides of the reinforcing part 200, the strength of the reinforcing part 200 can be improved, the possibility of bending the pole piece in the high-speed winding process can be reduced, and the winding and forming of the pole piece can be facilitated.
The embodiment also provides a battery, which comprises a shell and a bare cell formed by the pole pieces.
Claims (10)
1. The utility model provides a pole piece, includes current collector and utmost point ear, its characterized in that, utmost point ear includes main part (100) and reinforcing portion (200), reinforcing portion (200) are located both sides of main part (100) and with main part (100) integrated into one piece, the surface coating of reinforcing portion (200) has the coating.
2. A pole piece according to claim 1, wherein the side of the stiffening portion (200) remote from the main body portion (100) is an arcuate side (201).
3. A pole piece according to claim 2, wherein the arcuate edge (201) is recessed towards one side of the body portion (100).
4. A pole piece according to claim 1, wherein the width of each of the reinforcing portions (200) is not more than 1/5 of the width of the main body portion (100) with the extending direction of the bottom edge (101) of the main body portion (100) as the width direction.
5. A pole piece according to claim 1, characterized in that the height of the reinforcement portion (200) is 1/3-1/2 of the height of the main body portion (100) with the direction perpendicular to the bottom edge (101) of the main body portion (100) as the height direction.
6. A pole piece according to claim 1, characterized in that the coating is a ceramic coating.
7. The pole piece of claim 6, wherein the ceramic coating is comprised of aluminum oxide and boehmite.
8. A pole piece according to claim 1, characterized in that the thickness of the coating is in the range of 30um-100um.
9. A pole piece according to any of claims 1-8, characterized in that the reinforcement has a first surface and a second surface in the thickness direction, the coating being applied on the first surface and/or the second surface.
10. A battery comprising a housing and a bare cell of a pole piece according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321042027.8U CN219959345U (en) | 2023-05-04 | 2023-05-04 | Pole piece and battery comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321042027.8U CN219959345U (en) | 2023-05-04 | 2023-05-04 | Pole piece and battery comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219959345U true CN219959345U (en) | 2023-11-03 |
Family
ID=88546044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321042027.8U Active CN219959345U (en) | 2023-05-04 | 2023-05-04 | Pole piece and battery comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219959345U (en) |
-
2023
- 2023-05-04 CN CN202321042027.8U patent/CN219959345U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |