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High-power laminated lithium battery aluminum casing structure and manufacturing method

A manufacturing method and laminated technology, applied to large-sized batteries/battery packs, manufacturing tools, structural parts, etc., can solve the problems of increasing the battery shell wall, increasing the weight of the battery, and not meeting the lightweight requirements, so as to avoid Larger increase in effect

Active Publication Date: 2017-08-29
昆山斯格威电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the large area of ​​the shell wall, increasing the thickness of the battery shell wall will obviously increase the weight of the battery, which obviously does not meet the lightweight requirements for vehicles such as automobiles or other applications that use stacked lithium batteries.

Method used

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  • High-power laminated lithium battery aluminum casing structure and manufacturing method
  • High-power laminated lithium battery aluminum casing structure and manufacturing method
  • High-power laminated lithium battery aluminum casing structure and manufacturing method

Examples

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0031] Such as figure 1 , figure 2 and image 3 As shown, the aluminum casing structure of the high-power laminated lithium battery of the present invention includes a cylindrical casing wall 1 , and the cross section of the casing wall 1 is a rectangle with four rounded corners. The outer surface of the shell wall 1 is provided with a plurality of annular reinforcing ribs 2 sleeved on the cylindrical shell wall. Preferably, the plurality of annular reinforcing ribs 2 are parallel to each other.

[0032] The rib plate 2 and the shell wall 1 are welded by friction stir welding, and the welds 12 are arranged on the planes of the four sides of the shell wall, avoiding the rounded corners of the...

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Abstract

The invention discloses an aluminum shell structure of a high-power laminated lithium battery, which comprises a cylindrical shell wall whose cross-section is a rectangle with four corners all rounded; the outer surface of the shell wall is provided with a plurality of The ring-shaped stiffener plate on the cylindrical shell wall is welded by friction stir welding between the stiffener plate and the shell wall, and the welds are set on the planes of the four sides of the shell wall, avoiding the roundness of the shell wall. horn. The invention provides a casing structure and a manufacturing method that can ensure the strength and rigidity of the battery casing without significantly increasing the weight. For larger aluminum shells of high-power laminated lithium batteries, friction stir welding is used to weld stiffeners and stiffeners on the outside of the shell to ensure that the strength and rigidity of the battery shell meet the requirements and avoid The large increase in battery weight is in line with the trend of lightweight.

Description

technical field [0001] The invention relates to a high-power laminated lithium battery aluminum casing structure and a manufacturing method. Background technique [0002] For laminated lithium batteries, if you want to increase the power of the battery cell, you need to increase the number of battery positive and negative foil layers and the foil length, width, and area size accordingly, and the size of the battery case will also increase accordingly. . [0003] Assuming that the size of the battery casing increases greatly, while the structural form of the casing remains unchanged, and the thickness of the material used does not increase accordingly, the rigidity of the casing structure will not meet the needs. [0004] In order to ensure that the strength and rigidity of the battery case meet the requirements, the thickness of the case bottom and cover should be increased. Since the area of ​​the case bottom and cover is relatively small, the weight increase caused by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02B23K20/12H01M50/102
CPCB23K20/122B23K20/1245H01M50/10Y02E60/10
Inventor 赵欣李彦国谷国迎沈金华杨洪刚蔡智亮许雄朱琼雁朱鉴
Owner 昆山斯格威电子科技有限公司
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