CN215644897U - Lithium battery with spot welding block and continuous welding rod - Google Patents
Lithium battery with spot welding block and continuous welding rod Download PDFInfo
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- CN215644897U CN215644897U CN202121591664.1U CN202121591664U CN215644897U CN 215644897 U CN215644897 U CN 215644897U CN 202121591664 U CN202121591664 U CN 202121591664U CN 215644897 U CN215644897 U CN 215644897U
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- lithium battery
- spot welding
- top cover
- aluminum shell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
A lithium battery with spot welding blocks and continuous welding rods comprises a cuboid aluminum shell with an opening at the upper part, a lithium battery pack, a top cover arranged at the top of the lithium battery pack, a plurality of spot welding blocks arranged between the top cover and the aluminum shell, and the continuous welding rods arranged between the top cover and the aluminum shell and positioned above the spot welding blocks, wherein the top cover is rectangular; the top cover is located in the opening of the aluminum shell. So joint strength is high, low, the centre gripping of being convenient for is fixed to the location requirement of aluminum hull and top cap.
Description
Technical Field
The utility model relates to the technical field of lithium battery products, in particular to a lithium battery with spot welding blocks and continuous welding rods.
Background
The top of the lithium battery pack is provided with the top cover, the lithium battery with the top cover is assembled into an aluminum shell with a top opening during assembly, and then the aluminum shell and the top cover are welded together at the opening edge of the aluminum shell. The existing welding mode is continuous welding, and a closed continuous welding rod is formed between an aluminum shell and a top cover. So joint strength is low, because the opening parallel and level of top cap and aluminum hull need be kept, requires highly to the location of aluminum hull and top cap, troublesome poeration, work efficiency is low.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a lithium battery with spot welding blocks and continuous welding rods, which has high connection strength, low requirement for positioning the aluminum shell and the top cover, and is convenient for clamping and fixing, so as to solve the above problems.
A lithium battery with spot welding blocks and continuous welding rods comprises an aluminum shell with an opening on one side, a lithium battery pack positioned in the aluminum shell, a top cover arranged on one side of the lithium battery pack, a plurality of spot welding blocks arranged between the top cover and the aluminum shell and continuous welding rods; the aluminum shell is in a cuboid shape, the top cover is in a rectangular shape, and the top cover is positioned at the opening of the aluminum shell; the continuous welding rod is located on one side, far away from the lithium battery pack, of the spot welding block.
Further, the top cover is flush with the top of the aluminum housing.
Further, the height of the top cover is lower than the top height of the aluminum shell, and the height difference between the top cover and the aluminum shell is less than or equal to 0.1 mm.
Furthermore, a first gap is formed between the circumferential edge of the top cover and the inner side of the opening of the aluminum shell, the width of the first gap is 0.05mm-0.5mm, and the spot welding block and the continuous welding rod are formed in the first gap.
Furthermore, the top of lithium cell group sets up and passes the anodal post and the negative pole post of top cap protrudingly, and first end and the second end that anodal post and negative pole post are close to the top cap respectively.
Furthermore, the spot welding blocks are distributed on one side, far away from the first end, of the negative pole column.
Furthermore, the spot welding blocks are distributed on one side, far away from the second end, of the positive pole.
Further, the tail end and the head end of continuous welding rod superpose the coincidence, and the distance that tail end and head end superpose the coincidence is 0.5 mm.
Compared with the prior art, the lithium battery with the spot welding blocks and the continuous welding rods comprises a cuboid aluminum shell with an opening at the upper part, a lithium battery pack, a top cover arranged at the top of the lithium battery pack, a plurality of spot welding blocks arranged between the top cover and the aluminum shell and the continuous welding rods arranged between the top cover and the aluminum shell and positioned above the spot welding blocks, wherein the top cover is rectangular; the top cover is located in the opening of the aluminum shell. So joint strength is high, low, the centre gripping of being convenient for is fixed to the location requirement of aluminum hull and top cap.
Drawings
Embodiments of the utility model are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic perspective view of a lithium battery with spot welding blocks and continuous welding rods according to the present invention before welding.
Fig. 2 is a schematic view of the inside of a lithium battery having a spot welding block and a continuous welding rod according to the present invention.
FIG. 3 is a partial schematic view of a lithium battery with spot welding blocks and continuous welding rods according to the present invention during spot welding.
Fig. 4 is a partial schematic view of a lithium battery with spot welding blocks and continuous welding rods according to the present invention during continuous welding.
Detailed Description
Specific embodiments of the present invention will be described in further detail below based on the drawings. It should be understood that the description herein of embodiments of the utility model is not intended to limit the scope of the utility model.
Referring to fig. 1 and 2, the lithium battery with spot welding blocks and continuous welding rods according to the present invention includes an aluminum case 10 having an opening at one side, a lithium battery pack 20, a top cap 30 disposed at one side of the lithium battery pack 20, a plurality of spot welding blocks 41 disposed between the top cap 30 and the aluminum case 10, and a continuous welding rod 42 disposed between the top cap 30 and the aluminum case 10.
The aluminum case 10 is shaped like a rectangular parallelepiped.
The top of the lithium battery pack 20 is also protruded through the positive and negative posts 22 and 23 of the top cap 30. Positive post 22 and negative post 23 are proximate first end a and second end B of top cover 30, respectively.
The top cover 30 is rectangular, a first gap 31 is formed between the circumferential edge of the top cover 30 and the inner side of the opening of the aluminum case 10, and the width of the first gap 31 is 0.05mm to 0.5 mm.
The top cover 30 is flush with the top of the aluminum casing 10, or the height of the top cover 30 is slightly lower than the top height of the aluminum casing 10, and the height difference between the top cover 30 and the aluminum casing 10 is less than or equal to 0.1 mm.
The spot welding block 41 and the continuous welding rod 42 are formed in the first gap 31.
Referring to fig. 3, when forming the spot welding block 41 and the continuous welding rod 42, the top cover 30 and the aluminum shell 10 are fixed by the clamping and positioning mechanism.
Then, moving from the first side a of the negative pole post 23 to the direction of the positive pole post 22 by a laser welding machine, moving to the second side B of the negative pole post 23 by bypassing the second end B, and simultaneously performing spot welding on the middle part of the side surface of the fixed top cover 30 and the aluminum shell 10 in the first gap 31 for multiple times in sequence to form a plurality of spot welding blocks 41, wherein the time interval of the spot welding is 0.1S; i.e. a plurality of spot-welded studs 41 are distributed on the side of the negative pole 23 away from the first end a.
In another embodiment, the laser welding machine may also move from one side of the positive post 22 to the negative post 23, move to the other side of the positive post 22 by bypassing the first end a, and perform multiple spot welding on the middle portion of the side surface of the fixed top cover 30 and the aluminum case 10 in the first gap 31 in sequence to form a plurality of spot welding blocks 41, that is, a plurality of spot welding blocks 41 are distributed on one side of the positive post 22 away from the second end B.
The clamping and positioning mechanism then releases the top cover 30 and the aluminum housing 10.
Referring to fig. 4, after the spot welding is finished for 0.5S, the laser welding machine moves from the second side B of the negative pole 23 to the direction away from the second end B, moves around the first end a to the direction of the second end B, moves around the second end B to the second side B of the negative pole 23, and continuously welds the top of the side surface of the fixed top cap 30 and the aluminum shell 10 in the first gap 31 to form the continuous welding rod 42. The tail end and the head end of the continuous welding rod 42 are overlapped and overlapped, and the overlapping and overlapping distance of the tail end and the head end is 0.5 mm. Therefore, welding leakage is prevented from occurring, or welding leakage is caused by deviation of the running position of the laser, or poor welding is caused by hardness change of aluminum alloy at the welded position and the welding point.
In another embodiment, the laser welding machine may move from the first side a of the negative electrode tab 23 in a direction away from the second end B, move in a direction toward the second end B after bypassing the first end a, and move to the first side a of the negative electrode tab 23 after bypassing the second end B.
The welding defocusing amount of the laser welding machine is 1.5 +/-1.0 mm, the welding speed is 70 +/-10 mm/s, and the protective gas flow is 50 +/-5L/min.
The power of the laser welding machine during spot welding is 500 +/-100W, and the power of the laser welding machine during continuous welding is 1000 +/-100W.
Compared with the prior art, the lithium battery with the spot welding blocks and the continuous welding rods comprises an aluminum shell 10 with an opening on one side, a lithium battery pack 20 positioned in the aluminum shell 10, a top cover 30 arranged on one side of the lithium battery pack 20, a plurality of spot welding blocks 41 and continuous welding rods 42, wherein the spot welding blocks 41 and the continuous welding rods 42 are arranged between the top cover 30 and the aluminum shell 10, the aluminum shell 10 is cuboid, the top cover 30 is rectangular, and the top cover 30 is positioned at the opening of the aluminum shell 10; the continuous welding rod 42 is located on the side of the spot welding block 41 away from the lithium battery pack 20. So joint strength is high, low, the centre gripping of being convenient for is fixed to the location requirement of aluminum hull and top cap.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents or improvements that are within the spirit of the present invention are intended to be covered by the following claims.
Claims (8)
1. The utility model provides a lithium cell with spot welding piece and continuous welding rod which characterized in that: the welding device comprises an aluminum shell with an opening on one side, a lithium battery pack positioned in the aluminum shell, a top cover arranged on one side of the lithium battery pack, a plurality of spot welding blocks arranged between the top cover and the aluminum shell and continuous welding rods; the aluminum shell is in a cuboid shape, the top cover is in a rectangular shape, and the top cover is positioned at the opening of the aluminum shell; the continuous welding rod is located on one side, far away from the lithium battery pack, of the spot welding block.
2. A lithium battery having a spot welding block and a continuous welding electrode as defined in claim 1, wherein: the top cover is flush with the top of the aluminum shell.
3. A lithium battery having a spot welding block and a continuous welding electrode as defined in claim 1, wherein: the height of the top cover is lower than the top height of the aluminum shell, and the height difference between the top cover and the aluminum shell is smaller than or equal to 0.1 mm.
4. A lithium battery having a spot welding block and a continuous welding electrode as defined in claim 1, wherein: a first gap is formed between the circumferential edge of the top cover and the inner side of the opening of the aluminum shell, the width of the first gap is 0.05mm-0.5mm, and the spot welding block and the continuous welding rod are formed in the first gap.
5. A lithium battery with a spot weld and a continuous electrode as in claim 4, wherein: the top of lithium cell group sets up and passes the anodal post and the negative pole post of top cap protrudingly, and anodal post and negative pole post are close to the first end and the second end of top cap respectively.
6. A lithium battery having a spot welding block and a continuous welding electrode as defined in claim 5, wherein: the plurality of spot welding blocks are distributed on one side, far away from the first end, of the negative pole column.
7. A lithium battery having a spot welding block and a continuous welding electrode as defined in claim 5, wherein: the spot welding blocks are distributed on one side, far away from the second end, of the positive pole.
8. A lithium battery having a spot welding block and a continuous welding electrode as defined in claim 5, wherein: the tail end and the head end of the continuous welding rod are overlapped, and the overlapping distance of the tail end and the head end is 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121591664.1U CN215644897U (en) | 2021-07-13 | 2021-07-13 | Lithium battery with spot welding block and continuous welding rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121591664.1U CN215644897U (en) | 2021-07-13 | 2021-07-13 | Lithium battery with spot welding block and continuous welding rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215644897U true CN215644897U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121591664.1U Active CN215644897U (en) | 2021-07-13 | 2021-07-13 | Lithium battery with spot welding block and continuous welding rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215644897U (en) |
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2021
- 2021-07-13 CN CN202121591664.1U patent/CN215644897U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220829 Address after: Room 108, 1st Floor, Office Building, No. 8, Xinda Road, Huimin Street, Jiashan County, Jiaxing City, Zhejiang Province, 314199 Patentee after: Litian Wanshi Energy System (Zhejiang) Co.,Ltd. Address before: 314100 first floor of office building 8, Xinda Road, Huimin street, Jiashan County, Jiaxing City, Zhejiang Province, and first floor of plant 6 Patentee before: Wanli new energy Co.,Ltd. |
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| TR01 | Transfer of patent right |