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Battery module

A technology of battery modules and battery components, which is applied to battery pack components, secondary battery repair/maintenance, circuits, etc. It can solve the problems of poor battery preloading effect, reduce weight, overcome expansion force, and prolong charging and discharging The effect of times

Pending Publication Date: 2022-07-22
北京固芯能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problem that the preloading force in the battery system in the prior art is mainly pre-added to the battery shell through rigid materials through bolts, so that the battery preloading effect is poor, and provides a battery module

Method used

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Embodiment Construction

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0033] It should be understood that the orientations or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc. are based on the orientations or positions shown in the drawings The relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention....

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Abstract

The invention belongs to the technical field of batteries, and particularly relates to a battery module. The battery module comprises a sealing shell provided with an internal space and a battery assembly packaged in the internal space, and the battery assembly comprises a plurality of battery monomers; the internal space is filled with pressure gas with the pressure of 0.2 MPa to 3 MPa, and the pressure gas is used for applying pre-tightening force to the battery monomers. According to the present invention, the same pre-tightening force is applied to each surface of the battery monomer by the pressure gas, such that each surface of the battery assembly or each surface of the battery monomer is subjected to the uniform and rated pre-tightening force so as to effectively overcome the expansion force formed by the charging and discharging of the battery monomer, and prolong the charging and discharging frequency of the battery assembly.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a battery module. Background technique [0002] With the increasing demand for energy and power in electric vehicles and consumer electronics, in order to improve the cruising range of the battery, the capacity of the battery is generally increased by the selection of the positive electrode material and the negative electrode material of the battery to achieve the purpose of increasing the cruising range. For example, choosing a high-capacity alloy negative electrode (such as silicon, tin, aluminum, etc.) in the negative electrode material has more advantages in capacity than the common graphite negative electrode. However, there is a serious volume expansion problem during the charging and discharging process. The expansion is mainly due to the volume effect of lithium. The more lithium ions are inserted, the larger the unit cell parameters of the alloy phase forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M50/233H01M50/244H01M50/249H01M50/258
CPCH01M50/244H01M50/233H01M50/249H01M50/258H01M10/42
Inventor 刘舜李凯
Owner 北京固芯能源科技有限公司