Battery module and battery pack

Abstract

The invention relates to a battery module comprising a module shell, wherein the module shell can contain two or more monomer batteries (11); the module shell comprises a bottom surface and four side surfaces, and every two side surfaces are opposite; for any two opposite side surfaces of four side surfaces, one side surface is provided with a dovetail groove (1), and the other side surface is provided with a dovetail guide rail (2); the shape of the dovetail guide rail l (2) is adaptive to that of the dovetail groove (1); any two opposite side surfaces of the four side surfaces are respectively provided with a dovetail groove (1) or a dovetail guide rail (2); one side surface of the any two opposite side surface is provided with a dovetail groove (1), and the other side surface of the any two opposite side surfaces is provided with a dovetail guide rail (2); and the shape of the dovetail guide rail (2) is adaptive to the shape of the dovetail groove (1). The invention also discloses a battery pack composed of a plurality of battery modules. The battery module is characterized in that the monomer batteries can be reliably fixed in the battery module without moving, and the effective heat dissipation can be guaranteed.

Description

technical field [0001] The invention relates to a battery module for an electric vehicle and a battery pack including a plurality of the battery modules. Background technique [0002] Existing electric vehicles, considering their cruising range and driving speed, require single cells to be combined into a high-capacity, high-voltage battery pack as a power source for driving the motor. In view of the fact that the battery pack is composed of dozens or even hundreds of single cells connected in series and parallel, the position is prone to shift during use. In order to solve the above problems, some battery packs currently use a The fastening structure that changes the position of the center, and the cooling structure that can dissipate the heat generated during the use of the single battery. [0003] The existing fastening structure in the battery pack often adopts a concave-convex engaging structure, which includes a fixing protrusion and a fixing protrusion receiving part...

AI Technical Summary

Problems solved by technology

However, for a battery pack with such an interlocking structure, the interlocking structure is likely to loosen or even break during the driving of the electric vehicle, so it is difficult to avoid the position of the battery module changing, resulting in loosening of the series-parallel connection of the batteries; at the same time, due to the A change in the position of the module may also cause the blockage of the cooling air duct, which brings a great potential safety hazard

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