Local reinforcing method for battery pack box cover and reinforcing type battery pack box cover

A battery pack and case cover technology, applied to battery pack parts, circuits, electrical components, etc., can solve the problems of insufficient local strength and easy breakage of the battery pack case cover, and achieve enhanced overall and local strength and uniform stress distribution , the effect of reducing the risk of fracture

Pending Publication Date: 2019-12-31
江苏和中普方新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the local strength of the existing battery pack box cover is not strong enough, and it is prone to breakage and other problems

Method used

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  • Local reinforcing method for battery pack box cover and reinforcing type battery pack box cover
  • Local reinforcing method for battery pack box cover and reinforcing type battery pack box cover
  • Local reinforcing method for battery pack box cover and reinforcing type battery pack box cover

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as Figure 1-Figure 5 As shown, a reinforced battery pack case cover of this embodiment includes a case cover 5 and a reinforcing structure 4, the inner surface 51 of the case cover 5 protrudes outward to form a cross-shaped groove, and the The cross-shaped groove includes transverse grooves 1 and longitudinal grooves 2 arranged vertically and intersecting, the longitudinal grooves 2 are arranged along the length direction of the case cover 5, and the transverse grooves 1 are arranged along the width direction of the case cover 5, so The depth of the transverse groove 1 is less than the depth of the longitudinal groove 2; the two ends of the transverse groove 1 are respectively fixed with the reinforcement structure 4, and the reinforcement structure 4 covers the groove bottom, The tank wall and the inner surface 51 of the box cover. The reinforcing structure of this embodiment is generally in the shape of a sheet or a plate, and the reinforcing structure only cov...

Embodiment 2

[0045] A method for locally reinforcing the case cover of a battery pack in this embodiment is equivalent to the method for preparing a reinforced case cover for a battery pack in Example 1, comprising the following steps:

[0046] S1, performing finite element analysis on the structure of the box cover 5 with cross-shaped grooves;

[0047] S2, determine the stress concentration parts in the box cover 5 whose structural strength does not meet the yield limit of the box cover 5 material;

[0048] S3, designing a reinforcement structure 4 that is the same as the structure of the stress concentration part;

[0049] S4, fixing the reinforcing structure 4 on the inner surface of the stress concentration part of the case cover 5 to form a reinforced battery pack case cover.

[0050] In the reinforcement method of this embodiment, the finite element analysis of the cover structure of the battery pack is carried out first, and after determining the stress concentration position, a re...

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Abstract

The invention relates to a local reinforcing method for a battery pack box cover and a reinforcing type battery pack box cover. The reinforcing type battery pack box cover comprises a box cover body and reinforcing structures, wherein the inner surface of the box cover protrudes outwards to form a cross-shaped groove; the cross-shaped groove comprises a transverse groove and a longitudinal groovewhich are perpendicularly formed in a crossed mode; the longitudinal groove is formed in the length direction of the box cover; the transverse groove is formed in the width direction of the box cover;the depth of the transverse groove is smaller than that of the longitudinal groove; the reinforcing structures are fixed to the two ends of the transverse groove correspondingly and cover the groovebottom and the groove wall of the transverse groove and the inner surface of the box cover correspondingly. The reinforcing structures are arranged at the two ends of the transverse groove of the battery pack box cover, so that the overall and local strength of the battery pack box cover can be enhanced, the risk that the battery pack box cover is locally broken is reduced, and the stress distribution of the battery pack box cover is uniform; the thickness of the battery pack box cover does not need to be integrally increased, that is, the weight of the box cover does not need to be additionally increased, so that the overall strength can reach the standard after the reinforcing structures are additionally arranged.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a method for partially reinforcing a battery pack case cover and a reinforced battery pack case cover. Background technique [0002] At present, the plate of the general battery pack box cover is a large-scale stamped and formed whole, so it is inevitable that there will be insufficient local strength. When in use, the direct defect of the battery pack box cover is that it will break in a certain part. For such a battery pack case cover whose structural strength does not meet the standard, it is generally remedied by increasing the thickness of the case cover, but this will increase the overall weight of the case cover. Contents of the invention [0003] The technical problem to be solved by the present invention is that the local strength of the existing battery pack box cover is insufficient, and problems such as fracture are prone to occur. [0004] The technica...

Claims

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Application Information

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IPC IPC(8): H01M2/10
CPCH01M50/20Y02E60/10
Inventor 刘刚
Owner 江苏和中普方新能源科技有限公司
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