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A structure of a power battery pack and an assembly method thereof

A power battery pack and plug-in structure technology, which is applied to secondary batteries, structural parts, transportation and packaging, etc., can solve the problems of liquid leakage, weld failure, stamping die production and high maintenance costs, etc.

Pending Publication Date: 2018-12-28
江苏卡耐新能源有限公司 +4
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Most of the existing battery packs are made of stamped aluminum plates. The production and maintenance costs of stamping dies are relatively high, and they are fixed with the battery pack case by bolts. This hard-connected structure will transmit a part Stress to the liquid cold plate, long-term use has the risk of weld failure and leakage

Method used

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  • A structure of a power battery pack and an assembly method thereof
  • A structure of a power battery pack and an assembly method thereof
  • A structure of a power battery pack and an assembly method thereof

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Embodiment Construction

[0038] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0039] This example presents a light-weight aluminum profile battery pack box structure, which is mainly composed of extruded aluminum profile tailor-welded boxes, so as to overcome the problems existing in the existing power battery pack structure, and is also suitable for large-scale automation Production.

[0040] The structure of the power battery pack given in this example is mainly composed of an upper box, a lower box and several liquid-cooled plate components. Among them, a number of liquid-cooled plate assemblies are formed on the lower box to form a battery module installation area to install the battery module accordingly, and the upper box and the lower box cooperate with each other to form a box that can cover the battery module.

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Abstract

A structure of a power battery pack and an assembly method thereof are provided and the structure of a power battery pack mainly comprises a box body and a plurality of liquid cooling plate assembliesarranged in the box body, the box body comprises an upper box body and a lower box body which match each other, wherein the lower box body comprises a bottom of the box body and a plurality of box walls arranged along the bottom of the box body; the box walls and the bottom of the box body are connected with a solid plug structure and fixed by friction stir welding; the plurality of box walls arefixedly connected in turn. The power battery pack structure scheme provided by the scheme not only solves the problems of easy stress concentration and potential failure risk of the weld, but also improves the structural reliability of the liquid cooling plate, and solves the industry problems well.

Description

technical field [0001] The invention relates to power battery technology, in particular to a battery pack structure of the power battery. Background technique [0002] As new energy vehicles require higher and higher energy density of power battery packs, new battery material systems and fast charging and discharging applications, under the requirement of ensuring battery life, more and more power battery systems begin to use liquid cooling systems , so high rigidity, high reliability lightweight box technology needs to be developed and applied, and how to ensure the reliability of the liquid cold plate is an important technical issue for structural engineers to decide. [0003] Most of the existing battery packs are made of stamped aluminum plates. The production and maintenance costs of stamping dies are relatively high, and they are fixed with the battery pack case by bolts. This hard-connected structure will transmit a part Stress to the liquid cold plate, long-term use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M10/613H01M10/625H01M10/6567H01M10/04B60L11/18H01M50/249
CPCH01M10/0404H01M10/613H01M10/625H01M10/6567H01M50/20Y02E60/10Y02P70/50
Inventor 胡广伟李小辉杜禾杨政杰吴圣
Owner 江苏卡耐新能源有限公司
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