Lower box body of power battery

Abstract

The invention discloses a power battery lower box body, which comprises a cooling plate and a frame body fixedly connected to the cooling plate, the frame body comprises two opposite side walls, two opposite end walls, and cross beams and longitudinal beams connected between the two side walls, the two end walls are respectively arranged at two ends of the side walls, the plurality of cross beams are arranged in parallel at intervals, and the longitudinal beams are arranged in parallel at intervals. The longitudinal beams are arranged in parallel at intervals, the transverse beams and the longitudinal beams perpendicularly intersect, so that the space defined by the cooling plate, the side walls and the end walls is divided into a plurality of containing cavities, and one end wall is provided with a plurality of connecting positions. In the lower box body of the power battery provided by the embodiment of the invention, the accommodating cavity is defined by arranging the cross beams and the longitudinal beams, so that a bottom plate is omitted, the structure of the lower box body of the power battery is simplified, the weight of a battery cell stack can be greatly reduced, the integration level and the energy density of the power battery can be improved, and the cooling effect can also be enhanced; and various electronic devices can be mounted in a centralized manner, so that subsequent maintenance and replacement of the electronic devices are facilitated, and the maintenance convenience of the power battery is greatly improved.

Description

Technical field [0001] The present invention relates to the field of power cells, and in particular, to a power battery under the box. Background technique [0002] Under the national support and market, the dynamic lithium battery industry has developed very rapidly. It has expanded to electric bus, electric cars, microcontric transportation, etc., and with the large-scale application of the power lithium battery, it is increasingly It is also growing more and more problems, in general, including fixed, heat dissipation, electrical connection, sampling, and positive and negative electrode outputs of the module. [0003] At present, power batteries generally use independent standard VDA (German Automotive Industry Federation) size modules to assemble, VDA standard modules are complex, the power battery is low, and the energy density is also low. Inventive content [0004] It is an object of the present invention to provide a power battery having a high integration and high energ...

AI Technical Summary

Problems solved by technology

[0003] At present, power batteries are generally assembled with independent standard VDA (German Automobile Industry Association) size modules. VDA standard modules have complex structures, low power battery integration, and low energy density.

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