Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle

A technology for battery casings and battery packs, which is used in the manufacture of electric vehicles, battery pack components, and secondary batteries, can solve problems such as poor sealing and connection strength, and achieve high reliability, convenient automated production, and good connection strength. and sealing performance

Inactive Publication Date: 2016-07-20
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of poor sealing and connection strength of the existing battery casing, and provide a battery casing and a preparation method thereof as well as a battery, a battery pack, a battery pack and an electric vehicle

Method used

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  • Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle
  • Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle
  • Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 2 As shown, the cover plate of aluminum alloy is molded to have a sunken cover plate body, reinforcing ribs, straight lift positions of the cover plate and lap joints. Put the cover plate into the aluminum alloy shell, and the overlapping part overlaps the edge of the opening of the shell, and the part of the shell corresponding to the straight lift position of the cover plate is the straight lift position of the shell.

[0059] Place the vertical lifting position of the shell and the vertical lifting position of the cover plate in parallel and at intervals with a gap of 1.0mm, and then perform electromagnetic pulse welding (PS48-16 / 25 model of PST Company) at the place to be connected, and the welding energy is 30KJ, and the battery is obtained. housing, soldering locations such as figure 1 shown. Wherein, the width of the formed connecting region is 3 mm.

[0060] The casing of the obtained battery was tested for connection strength and sealing perf...

Embodiment 2

[0063] Such as Figure 4 As shown, the stainless steel housing is formed with bent edges.

[0064] Place the magnesium-aluminum alloy cover plate on the top of the flange, the angle between the flange and the cover plate is 5°, and the gap is 1.5mm, and then perform electromagnetic pulse welding (PS48-16 / 25 model of PST Company) at the place to be connected , the welding energy is 48KJ, to get the shell of the battery, the welding position is as follows image 3 shown. Wherein, the width of the formed connecting region is 5 mm.

[0065] The casing of the obtained battery was tested for connection strength and sealing performance, and the connection strength was 270 MPa, and the sealing strength was 1.05 MPa.

[0066] Use a metallographic microscope to observe the structure and morphology of the connection between the cover plate and the shell, such as Figure 6 As shown, there is no alloy phase diagram.

Embodiment 3

[0068] Such as figure 2 As shown, the stainless steel cover plate is formed to have a sinking cover plate body, reinforcement ribs, cover plate straight-up position and lap joints. Put the cover plate into the aluminum alloy shell, and the overlapping part overlaps the edge of the opening of the shell, and the part of the shell corresponding to the straight lift position of the cover plate is the straight lift position of the shell.

[0069] Place the vertical lifting position of the shell and the vertical lifting position of the cover plate in parallel and at intervals with a gap of 1.2mm, then perform electromagnetic pulse welding (PS48-16 / 25 model of PST Company) at the place to be connected, and the welding energy is 35KJ to obtain the battery. housing, soldering locations such as figure 1 shown. Wherein, the width of the formed connecting region is 5 mm.

[0070] The casing of the obtained battery was tested for connection strength and sealing performance, and the con...

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Abstract

The invention discloses a battery housing and a manufacturing method thereof, a battery, a battery bank, a battery pack and an electric vehicle. The housing comprises a cover board and a shell, wherein an opening is formed in at least one end; at least one of the cover board or the shell comprises a support structure and a bending part; and the cover board is hermetically connected with the shell in an atom binding manner. The battery housing disclosed by the invention can have relatively good connection strength and sealing property.

Description

technical field [0001] The invention relates to a battery casing and a preparation method thereof, as well as a battery, a battery pack, a battery pack and an electric vehicle. Background technique [0002] The shell of the battery plays the role of sealing and protecting the cells and electrolyte in the battery. Once the seal is damaged, the battery pack will be short-circuited or even caught fire due to water ingress. However, the connection and sealing strength of the casing of the existing battery is insufficient. [0003] Therefore, there is a need for a battery casing that provides good connection strength and sealing performance between the cover plate and the casing. Contents of the invention [0004] The object of the present invention is to overcome the defects of poor sealing and poor connection strength of the existing battery casing, and provide the battery casing and its preparation method as well as batteries, battery packs, battery packs and electric vehic...

Claims

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Application Information

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IPC IPC(8): H01M2/10H01M10/04B60L11/18H01M50/236H01M50/24
CPCY02T10/70Y02E60/10Y02P70/50
Inventor 蒋露霞胡世超杨珂利郑卫鑫朱建华沈晞
Owner BYD CO LTD
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