A battery module and battery box with a liquid cooling device

Abstract

A battery module and a battery box with a liquid cooling device, comprising a shell, a plurality of battery cells and a liquid cooling device, a plurality of the battery cells are arranged laterally in the shell in sequence, and the liquid cooling device includes a device. The liquid inlet pipeline, the liquid return pipeline and a plurality of liquid cooling plates on the casing are provided with a main liquid inlet flow channel, and the inner diameter of the main liquid inlet flow channel is determined by the main liquid cooling plate. The inlet to the return connection gradually becomes larger. Compared with the prior art, the battery module with the liquid cooling device provided by the present invention has the following advantages: First, the inner diameter of the main liquid inlet channel of the liquid cooling plate in the present invention gradually increases from the main liquid inlet to the return connection part. It becomes larger, so that each cooling channel connected with the main liquid inlet channel can achieve a good liquid flow circulation, and the liquid cooling plate is closely attached to the battery cell, ensuring that all parts of the battery core can be uniformly dissipated, and the battery core temperature consistency is good. The reliability of the battery cell in use is improved, and the service life of the battery core is prolonged.

Description

technical field [0001] The invention relates to a battery module, in particular to a battery module with a liquid cooling device and a battery box using the battery module. Background technique [0002] The battery module can be understood as the intermediate product of the battery and the pack formed by the combination of lithium-ion cells in series and parallel, and the addition of a single battery monitoring and management device. Its structure must support, fix and protect the cells, which can be summarized into three major items: mechanical strength, electrical properties, thermal properties and fault handling capabilities. Whether it can fix the position of the battery cell and protect it from deformation that damages its performance, whether it can avoid the spread of thermal runaway, etc., will be the criteria for judging the quality of battery modules. [0003] The temperature environment in the battery pack has a great influence on the reliability, life and perfor...

AI Technical Summary

Problems solved by technology

The existing cooling plate is generally provided with a liquid inlet channel, a plurality of cooling branches connected to the liquid inlet channel, and a liquid return channel connected with the plurality of cooling branches, but in the cooling branch channel far from the inlet of the liquid inlet channel The circulation efficiency of the cooling liquid is low, which reduces the heat dissipation efficiency of the cooling plate, resulting in poor heat dissipation of the battery cell

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