Heat conducting device for lithium ion battery pack

Abstract

The invention discloses a heat conducting device for a lithium ion battery pack. The heat conducting device for the lithium ion battery pack comprises a liquid cooling plate and a heat conducting plate. The heat conducting plate is mounted o the liquid cooling plate in a combined manner, the liquid cooling plate is arranged at the front ends of battery modules, is parallel to the front end surfaces of the battery modules and closely clings to the front end surfaces of the battery modules, contact sides of the liquid cooling plate and the battery modules are of planar structures, heat exchange flow channels are further arranged on the liquid cooling plate, the heat conducting plate is mounted perpendicular to the liquid cooling plate, the surfaces of the heat conducting plate closely cling to the side walls of the battery modules, heat conducting plate mounting insertion openings are formed in the liquid cooling plate, the front end of the heat conducting plate penetrates the heat conducting plate mounting insertion openings in the liquid cooling plate to be fixed onto the liquid cooling plate, and the rear end of the heat conducting plate extends to the rear end surfaces of the battery modules. The heat conducting device for the lithium ion battery pack has the advantages of high heat conductivity, good uniform-temperature performance, compact structure, convenience in extension and mounting and the like.

Description

technical field [0001] The invention relates to a battery pack heat conduction device, which belongs to the technical field of power batteries. Background technique [0002] In the context of the current energy and environmental problems becoming more and more serious, green energy has attracted great attention, and the application of lithium-ion batteries to electric vehicles has become a research hotspot. Due to the characteristics of the battery itself, it needs to work in a suitable temperature range. If the temperature is too high or too low, it will affect the service life, energy efficiency and other performance of the battery, and even cause safety problems. In addition, the battery pack is composed of a large number of single cells connected in series and parallel. The heat generation and heat dissipation rates of each single cell are different, resulting in inconsistent temperature of the single cells in different areas of the battery pack, exacerbating the inconsi...

AI Technical Summary

Problems solved by technology

Due to the characteristics of the battery itself, it needs to work in a suitable temperature range. If the temperature is too high or too low, it will affect the service life, energy efficiency and other performance of the battery, and even cause safety problems.

In addition, the battery pack is composed of a large number of single cells connected in series and parallel. The heat generation and heat dissipation rates of each single cell are different, resulting in inconsistent temperature of the single cells in different areas of the battery pack, exacerbating the inconsistency of the battery, and affecting the performance of the battery. , serious security issues

At present, the heat conduction of battery packs is mainly air-cooled and liquid-cooled. The structure of the air-cooled system is relatively simple, but the required air duct requires a large space for the battery box, and the cooling speed is slow and the temperature consistency is poor. ; The cooling speed of the liquid cooling system is fast and the temperature uniformity is good, but the structure of the liquid cooling system is complex and the weight is relatively large

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