CN221126188U - Converging sheet of cylindrical battery rolling groove structure - Google Patents
Converging sheet of cylindrical battery rolling groove structure Download PDFInfo
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- CN221126188U CN221126188U CN202322945445.4U CN202322945445U CN221126188U CN 221126188 U CN221126188 U CN 221126188U CN 202322945445 U CN202322945445 U CN 202322945445U CN 221126188 U CN221126188 U CN 221126188U
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- Prior art keywords
- sheet
- current collecting
- cylindrical battery
- welding
- grooves
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- 238000005096 rolling process Methods 0.000 title claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 69
- 238000005520 cutting process Methods 0.000 claims abstract description 21
- 230000003313 weakening effect Effects 0.000 claims description 7
- 239000013585 weight reducing agent Substances 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005476 soldering Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a bus bar of a cylindrical battery rolling groove structure, which is characterized by comprising a circular current collecting bar, wherein the edge of the current collecting bar extends towards one side along the thickness direction to form a circular shell welding bar, the edge of the current collecting bar is provided with a plurality of cutting grooves uniformly distributed along the circumferential direction, the cutting grooves are arranged along the radial direction of the current collecting bar and cut off the shell welding bar, and the outer diameter of the shell welding bar is matched with the inner diameter of a shell to be assembled. The utility model has the advantages of simple structure, easy manufacture, capability of avoiding false soldering, contribution to improving the yield of the battery and the like.
Description
Technical Field
The utility model relates to the technical field of cylindrical batteries, in particular to a confluence sheet of a cylindrical battery rolling groove structure.
Background
In the manufacturing process of cylindrical batteries, a sealing structure commonly used at present is a rolling groove sealing. For large cylindrical batteries, the electrode assembly is typically welded to the buss plate, then the negative buss plate is welded to the wall of the can, the can is negatively charged, and finally the can is rolled and capped. This structure is when the welding of negative pole busbar and casing, appears following problem easily: when the slot is rolled, the shell is extruded by external force, the bus piece is deformed due to the action of the internal force exerted by the shell, and the bus piece and the tab are torn; the end face of the plate group is uneven after being kneaded, so that the confluence sheet is inclined, and the welding position and the welding contact position of the confluence sheet boss deviate; the busbar is matched with the diameter design of the shell, but when the metal slightly extends in the welding process to cause the welding of the last section of boss, the boss cannot be contacted with the shell, and the cold joint is caused. The above problems all affect the yield of the battery.
Disclosure of utility model
Aiming at the defects in the prior art, the utility model aims to solve the technical problems that: how to provide a simple structure, it is easy to make, can avoid the rosin joint, is favorable to improving the conflux piece of battery yields.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The utility model provides a cylinder battery slot rolling structure's collector, its characterized in that, is including being circular shape collector, the edge of collector extends towards one side along thickness direction and is formed with annular casing welding piece, the edge of collector has a plurality of cutting grooves that set up along circumference equipartition, cutting groove is followed collector's radial setting, and cuts off the casing welding piece, the external diameter of casing welding piece and the internal diameter phase-match of waiting to assemble the casing.
During assembly, one side of the bus sheet, which deviates from the shell welding sheet, is plugged into the shell, the shell welding sheet is matched with the shell, and the shell welding sheet is cut off by a plurality of cutting grooves, so that each shell welding sheet has the capability of bending towards the middle part, when the shell rolls, the shell is extruded inwards, the shell welding sheet can bend, the stress is released inwards, the deformation of the bus sheet caused by extrusion is avoided, and the tearing of the bus sheet and the electrode lugs is further avoided. In addition, by utilizing the cooperation of the shell welding sheet and the shell, the inclination of the bus sheet can be avoided, and the deviation of the welding position and the welding contact position of the boss of the bus sheet can be prevented. Meanwhile, the shell welding sheet is in contact with the shell, so that the cold joint can be avoided during welding, the welding quality is improved, and the yield is ensured.
Further, the current collecting piece is provided with a plurality of groups of weight reducing grooves which are arranged corresponding to the cutting grooves, and each group of weight reducing grooves are arranged at intervals along the radial direction of the current collecting piece and are positioned on the same straight line with the corresponding cutting grooves.
Therefore, the weight of the structural part can be reduced and the energy density of the battery can be improved through the hollowed-out design of the weight reducing groove. In addition, after the weight-reducing groove is arranged, the current collecting sheets at two sides of the weight-reducing groove can be extruded and contracted towards the direction of the weight-reducing groove in the assembly process.
Further, two adjacent groups of the weight reducing grooves are provided with pole assembly welding pieces, and connecting pieces for connecting the two pole assembly welding pieces are formed between the two adjacent weight reducing grooves in the same group of the weight reducing grooves, and the thickness of each connecting piece is smaller than that of each current collecting piece.
Further, in the same group of weight-reducing grooves, the length of the weight-reducing groove near the middle part is longest.
Further, the outer diameter of the current collecting sheet is consistent with the inner diameter of a shell to be assembled, and the diameter of the end part, far away from the current collecting sheet, of the shell welding sheet is larger than the diameter of the current collecting sheet.
Like this, because the tip diameter of casing welding piece is greater than the diameter of collector plate for the casing welding piece is whole to be round platform shape, at the in-process that the collector plate plugged into the casing, the casing welding piece can receive the extrusion of casing towards the middle part progressively and inwards crooked, lets casing welding piece and casing form interference fit, has increased collector plate and casing welding area of contact.
Further, the thickness of the shell welding sheet is smaller than that of the current collecting sheet.
Therefore, the thickness of the shell welding sheet is reduced, so that the shell welding sheet has better deformability, and the assembly is easier.
Further, the outward end of the cut-off groove has weakening grooves extending along both sides in the circumferential direction, which cut off the connection between the current collecting tab and the case bonding tab.
In this way, the rigidity of the shell welding sheet can be further reduced through weakening the groove, so that the shell welding sheet can be bent better.
Further, the middle part of the current collecting plate is provided with a center hole which is concentrically arranged.
Further, the cutting grooves are uniformly distributed along the circumferential direction of the current collecting piece, and the number of the cutting grooves is 3.
Further, the current collecting sheet and the shell welding sheet are integrally formed.
In conclusion, the utility model has the advantages of simple structure, easy manufacture, capability of avoiding cold joint, contribution to improving the yield of the battery and the like.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic side view of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to examples.
The specific implementation method comprises the following steps: as shown in fig. 1 and 2, a collecting plate of cylindrical battery rolling groove structure comprises a circular collecting plate 1, wherein a central hole 5 is concentrically arranged in the middle of the collecting plate 1, an annular shell welding plate 2 is formed by extending the edge of the collecting plate 1 towards one side along the thickness direction, a plurality of cutting grooves 3 uniformly distributed along the circumferential direction are formed in the edge of the collecting plate 1, the cutting grooves 3 are arranged along the radial direction of the collecting plate 1 and cut off the shell welding plate 2, and the outer diameter of the shell welding plate 2 is matched with the inner diameter of a shell to be assembled. In this embodiment, the current collecting sheet 1 and the housing welding sheet 2 are integrally formed, and the cutting grooves 3 are uniformly distributed in the circumferential direction.
In addition, the current collecting sheet 1 is provided with a plurality of groups of weight reducing grooves 6 which are arranged corresponding to the cutting grooves 3, and each group of weight reducing grooves 6 are arranged at intervals along the radial direction of the current collecting sheet 1 and are positioned on the same straight line with the corresponding cutting grooves 3. A pole group welding sheet 7 is arranged between two adjacent groups of the weight reducing grooves 6, and connecting sheets 8 for connecting the two pole group welding sheets 7 are formed between two adjacent groups of the weight reducing grooves 6 in the same group of the weight reducing grooves 6, and the thickness of the connecting sheets 8 is smaller than that of the current collecting sheet 1.
During assembly, one side of the bus sheet, which deviates from the shell welding sheet, is plugged into the shell, the shell welding sheet is matched with the shell, and the shell welding sheet is cut off by a plurality of cutting grooves, meanwhile, the current collecting sheet is separated by a plurality of weight reducing grooves and is connected through connecting sheets, each shell welding sheet and each connecting sheet are enabled to have the ability of bending towards the middle part, when the connecting sheets roll, the shell is extruded inwards, the shell welding sheet and the connecting sheets can be bent, stress is released inwards, deformation of the bus sheet caused by extrusion is avoided, and tearing of the bus sheet and the tab is further avoided. In addition, by utilizing the cooperation of the shell welding sheet and the shell, the inclination of the bus sheet can be avoided, and the deviation of the welding position and the welding contact position of the boss of the bus sheet can be prevented. Meanwhile, the shell welding sheet is in contact with the shell, so that the cold joint can be avoided during welding, the welding quality is improved, and the yield is ensured. In addition, the weight of the structural part can be reduced and the energy density of the battery can be improved through the hollowed-out design of the weight reducing groove. In addition, after the weight-reducing groove is arranged, the current collecting sheets at two sides of the weight-reducing groove can be extruded and contracted towards the direction of the weight-reducing groove in the assembly process. In this embodiment, in the same group of the weight-reducing grooves 6, the length of the weight-reducing groove 6 near the middle is longest.
As shown in fig. 2, the outer diameter of the current collecting plate 1 is consistent with the inner diameter of a shell to be assembled, the diameter of the end part of the shell welding plate 2 away from the current collecting plate 1 is larger than the diameter of the current collecting plate 1, and the thickness of the shell welding plate 2 is smaller than the thickness of the current collecting plate 1.
Like this, because the tip diameter of casing welding piece is greater than the diameter of collector plate for the casing welding piece is whole to be round platform shape, at the in-process that the collector plate plugged into the casing, the casing welding piece can receive the extrusion of casing towards the middle part progressively and inwards crooked, lets casing welding piece and casing form interference fit, has increased collector plate and casing welding area of contact.
As shown in fig. 1, the outward end of the cut-off groove 3 has weakening grooves 4 extending along both sides in the circumferential direction, and the weakening grooves 4 cut off the connection between the current collecting tab 1 and the case bonding tab 2.
In this way, the rigidity of the shell welding sheet can be further reduced through weakening the groove, so that the shell welding sheet can be bent better.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The utility model provides a cylinder battery slot structure's collector, its characterized in that, including being circular shape collector (1), the edge of collector (1) is formed with annular casing welding piece (2) along thickness direction orientation one side extension, the edge of collector (1) has a plurality of cutting off groove (3) that set up along circumference equipartition, cutting off groove (3) are followed the radial setting of collector (1), and cut off casing welding piece (2), the external diameter of casing welding piece (2) and the internal diameter assorted of waiting to assemble the casing.
2. The cylindrical battery rolling groove structured bus bar according to claim 1, wherein the current collecting plate (1) is provided with a plurality of groups of weight reducing grooves (6) which are arranged corresponding to the cutting grooves (3), and each group of weight reducing grooves (6) is arranged along the radial direction of the current collecting plate (1) at intervals and is positioned on the same straight line with the corresponding cutting groove (3).
3. The cylindrical battery rolling groove structured bus bar according to claim 2, wherein a pole assembly welding tab (7) is arranged between two adjacent groups of the weight reduction grooves (6), and a connecting sheet (8) for connecting the two pole assembly welding tabs (7) is formed between two adjacent weight reduction grooves (6) in the same group of the weight reduction grooves (6), and the thickness of the connecting sheet (8) is smaller than that of the current collecting sheet (1).
4. The cylindrical battery rolling groove structured confluence sheet as claimed in claim 2, wherein the length of the weight-reducing groove (6) near the middle part is longest among the same group of the weight-reducing grooves (6).
5. A cylindrical battery slot-rolled structured busbar sheet as in any of claims 1 to 4, wherein the outer diameter of the current collecting sheet (1) corresponds to the inner diameter of the housing to be assembled, and the diameter of the end of the housing welding sheet (2) remote from the current collecting sheet (1) is larger than the diameter of the current collecting sheet (1).
6. The cylindrical battery slot-rolled structured bus bar as set forth in claim 5, wherein the thickness of the case bonding sheet (2) is smaller than the thickness of the current collecting sheet (1).
7. The cylindrical battery slot-rolled structured bus bar as set forth in claim 5, wherein the outward-facing end of the cutoff slot (3) has weakening slots (4) extending along both sides in the circumferential direction, the weakening slots (4) cutting off the connection between the current collecting tab (1) and the case bonding tab (2).
8. The cylindrical battery rolling groove structured collecting plate according to claim 1, wherein the collecting plate (1) has a central hole (5) concentrically arranged in the middle.
9. The cylindrical battery rolling groove structured collecting piece according to claim 1, wherein the cutting grooves (3) are uniformly distributed in the circumferential direction of the collecting piece (1).
10. The cylindrical battery rolling groove structured bus bar according to claim 1, wherein the current collecting sheet (1) is integrally formed with the case welding sheet (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322945445.4U CN221126188U (en) | 2023-11-01 | 2023-11-01 | Converging sheet of cylindrical battery rolling groove structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322945445.4U CN221126188U (en) | 2023-11-01 | 2023-11-01 | Converging sheet of cylindrical battery rolling groove structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221126188U true CN221126188U (en) | 2024-06-11 |
Family
ID=91363752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322945445.4U Active CN221126188U (en) | 2023-11-01 | 2023-11-01 | Converging sheet of cylindrical battery rolling groove structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221126188U (en) |
-
2023
- 2023-11-01 CN CN202322945445.4U patent/CN221126188U/en active Active
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