Battery module and battery thermal management system

Abstract

The invention provides a battery module and a battery thermal management system. The battery module comprises: a battery cell module comprising sides, a bottom surface and a top surface, wherein at least one side has a heat conducting surface; vapour chamber modules fixedly connected with the battery cell module, wherein each vapour chamber module comprises heat equalizing portion and a heat conducting portion, the heat equalizing portions are in thermal contact with the heat conducting surfaces, the heat conducting portions are located at the top surface of the battery cell module, the projections of the heat conducting portions at the top surface is located in the top surface, and / or, the heat conducting portions are located on the bottom surface of the battery cell module, the projections of the heat conducting portions at the bottom surface are located in the bottom surface, and the heat conducting portions are in thermal contact with a heat source or a cold source at the outer portion. The external heat is transmitted to the battery cell module through the heat conductings of the vapour chamber modules or the heat of the battery cell module is led out outside, the heat conducting portions are all located at the top portions and / or the bottom s of the vapour chamber modules so that the battery module is small in size and more battery modules are convenient to be arranged inthe battery box body.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery module and a battery thermal management system. Background technique [0002] In recent years, in order to solve the problem of environmental pollution, batteries capable of cyclic charge and discharge have been widely used, such as power sources for electric vehicles, hybrid vehicles, and plug-in hybrid vehicles. In practical applications, a battery pack is usually formed by connecting a plurality of small battery cells in series or in parallel to ensure desired voltage and capacity. [0003] During use, due to individual differences between battery cores (such as differences in charge and discharge path resistance, inconsistent state of charge, inconsistent voltage, etc.), inconsistent heat dissipation environments, etc., the temperature difference between each battery core will become larger and larger , Long-term use will damage the performance of the battery sys...

AI Technical Summary

Problems solved by technology

[0003] During use, due to individual differences between battery cores (such as differences in charge and discharge path resistance, inconsistent state of charge, inconsistent voltage, etc.), inconsistent heat dissipation environments, etc., the temperature difference between each battery core will become larger and larger , long-term use will damage the performance of the battery system and affect its life, so heat balance between the battery cores is required

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