Battery pack box body and battery pack

Abstract

The invention belongs to the technical field of electric vehicles, and specifically relates to a battery pack box body and a battery pack. A first skirt edge is arranged on the periphery of an upper box cover, a second skirt edge is arranged on the periphery of the top of a lower box body, the upper box cover and the lower box body are combined together in a matched mode in the mode that the firstskirt edge and the second skirt edge are overlapped and fixed together, and a sealing strip is arranged between the first skirt edge and the second skirt edge. The module mounting beam is mounted onthe inner upper side of the lower box body and provided with a fixing part for fixing a battery module, L-shaped fixing lugs are arranged at the two ends of the module pressing strip, and a block-shaped reinforcing rib and a strip-shaped reinforcing rib are formed on the inner bottom face of the lower box body in a punching mode. The pressing strip structure fixing mode is high in strength, good in stability, simple in installation process, light in weight and high in efficiency, and the safety performance of a system is improved. Installation process is simple, weight is light, and efficiencyis high. The battery pack box body adopts an enveloping structure, the height of the side keel is designed at the height of the gravity center horizontal plane of the battery pack cell, the lower boxbody strength is increased, the battery module fixed horizontal plane moment arm is zero, and the tension fracture damage of the moment to the battery pack box body is reduced.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a battery pack box body and a battery pack. Background technique [0002] With the increasing maturity and perfection of electric vehicle technology, electric vehicles are widely used in daily life. The power battery box is the core component of electric vehicles. Its manufacturing process includes: first, multiple batteries are connected in series and / or in parallel to form A battery module, and then multiple battery modules are connected in series and / or in parallel to form a battery box. [0003] The cruising range has always been the bottleneck of electric vehicles. At present, it is inevitable to install multiple battery modules in the battery loading box for power supply. The battery modules are separated by mounting brackets, but there are the following problems: On the one hand, the current In the existing technology, the weight of the cabinet is ve...

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Problems solved by technology

[0003] The cruising range has always been the bottleneck of electric vehicles. At present, it is inevitable to install multiple battery modules in the battery loading box for power supply. The battery modules are separated by mounting brackets, but there are the following problems: On the one hand, the current In the prior art, the weight of the box body is very large to ensure sufficient strength; on the other hand, the mounting brackets are welded on the keel structure, and the strength performance of the box body is guaranteed through the keel structure, but this will further cause the overall weight of the box body to be too high. This is in conflict with the high energy density design requirements of electric vehicle battery modules, and thus becomes a technical problem to be solved

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