Lower shell of aluminum alloy battery pack

An aluminum alloy and battery technology, applied in the direction of batteries, battery pack components, circuits, etc., can solve the problems of complex profile section, high manufacturing cost, short weld life, etc., and achieve long weld fatigue life, fewer parts, low cost effect

Pending Publication Date: 2019-12-24
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology has realized the lightweight of the lower case of the battery pack to a certain extent, but there are still shortcomings such as over-design, short weld life, complex profile cross-section, and high manufacturing cost.

Method used

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  • Lower shell of aluminum alloy battery pack
  • Lower shell of aluminum alloy battery pack
  • Lower shell of aluminum alloy battery pack

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0026] figure 1 It is an axonometric view of the lower casing of the aluminum alloy battery pack of the present invention, including four parts: frame structure 100, beam 200, floor 300 and middle lug 400; beam 200 and frame structure 100 are plugged through "male end, female end" and MIG The floor 300 is arranged between the beams, and fixed by friction stir welding and MIG welding; the middle lifting lug 400 passes through the beam 200 from bottom to top, and then fixed by MIG welding. Among them, by increasing the length of the side frame, the number of beams can be multiple, so as to meet the different needs of consumers for the cruising range, and flexibly install different numbers of battery modules to realize the platform and modular design and manufacture of batte...

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Abstract

The invention discloses a lower shell of an aluminum alloy battery pack. The lower shell comprises a frame structure, cross beams, a floor and a middle lifting lug. The frame structure is formed by splicing four frames with L-shaped sections, the two groups of cross beams have the same structure and are arranged in parallel, the shape of a cross section of one group of cross beams is inverted T, the shape of a cross section of the other group of cross beams is a step, and the two groups of cross beams and the L-shaped frames are overlapped by adopting male end and female end insertion structures and then are welded. The cross section of the floor is linear, and the floor is welded with the L-shaped frames and the cross beams after inserted connection. The middle lifting lug comprises a cylindrical middle lifting lug body of a hollow structure, the middle lifting lug body penetrates through the cross beams from bottom to top, a top of the middle lifting lug body is matched with a nut, and a circular ring piece penetrates through the middle lifting lug body from top to bottom and is fixed through MIG welding. According to the lower shell, the advantages of aluminum alloy are fully absorbed, the lightweight design of a battery pack box body is realized, the connection is reliable, the sealing performance is good, and the processing efficiency is high.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a lower casing of an aluminum alloy battery pack. Background technique [0002] With the increasing annual production and sales of automobiles, the problems of energy crisis and environmental degradation are becoming more and more serious. The development of electric vehicles is an important way to solve the above problems. However, the short cruising range is currently the primary problem restricting the development of electric vehicles. As one of the core components of an electric vehicle, the battery pack accounts for about one-third of the curb weight of the vehicle. Therefore, the lightweight design of the battery pack structure is of great significance for improving the target cruising range of electric vehicles. [0003] Existing battery packs mainly include three structural forms: steel battery packs, aluminum alloy die-casting battery packs and aluminum alloy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10
CPCH01M2220/20H01M50/20Y02E60/10
Inventor 段利斌吴闯龙宜凡江浩斌
Owner JIANGSU UNIV
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