Composite end plate and battery module

Abstract

The invention relates to a composite end plate and a battery module. The composite end plate includes: a rigid substrate having a first surface and a second surface opposite in its own thickness direction, the first surface can be set facing the single battery of the battery module, and the rigid substrate includes two opposite in its own width direction Ends; two rigid adapter tubes, the rigid adapter tubes extend along the height direction of the rigid substrate, the materials of the rigid adapter tube and the rigid substrate are different; each end of the rigid substrate is connected and fixed with a rigid adapter tube, the rigid The part of the adapter tube exposed on one side of the second surface is used for connection and fixation with the external structural member. When the composite end plate of the embodiment of the present invention is applied to a battery module, it can be firmly connected with the side plate, effectively offset the expansion and deformation force of the single battery, prevent the overall size of the battery module from increasing, and improve the safety and reliability of the battery module during use. .

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a composite end plate and a battery module. Background technique [0002] With the development of technology, the application range of power batteries is becoming wider and wider, involving production or life. The power battery is also called a secondary battery, which is a rechargeable battery. Power batteries are widely used. Low-capacity traction batteries can be used for small electric vehicles, and high-capacity traction batteries can be used for large electric vehicles, such as hybrid electric vehicles or electric vehicles. When the power batteries are used in groups, it is necessary to use a bus bar to connect each power battery in series or in parallel. Usually the bus bar is welded to the positive and negative electrodes of the power battery. Each power battery includes multiple battery modules. Each battery module includes a plurality of unit cells and end plates...

AI Technical Summary

Problems solved by technology

As the capacity of the battery module continues to increase, the single battery itself will expand in some cases, which will exert an expansion force on the end plates and side plates, which will easily cause deformation and displacement of the end plates and side plates, and cause side Weld failure between plate and end plate

Therefore, the traditional battery module has the problem of low structural strength

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