Composite end plate and battery module

Abstract

The invention relates to a composite end plate and a battery module. The composite end plate has a first surface and a second surface opposite in its own thickness direction, and the composite end plate includes: a rigid base plate, including two opposite ends in the width direction of the composite end plate; The height direction of the end plate extends, and the materials of the rigid adapter plate and the rigid base plate are different; the rigid adapter plate includes a first connecting section, an intermediate transition section and a second connecting section successively distributed in the width direction, and the second connecting section includes The transfer part and the free end connected by the intermediate transition section; both ends are provided with a rigid transfer plate; the free ends of the first connection section and the second transfer section are embedded in the rigid substrate, and the second connection section The transfer part is exposed on the second surface and can be connected and fixed with the external structural component. The composite end plate can be firmly connected with the side plate to offset the expansion and deformation force of the single battery, prevent the size of the battery module from increasing, and improve the safety of the battery module.

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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