Lithium ion battery pack tab liquid cooling based on liquid cooling

Abstract

The invention discloses a lithium ion battery pack tab liquid cooling based on liquid cooling. The liquid cooling device comprises a closed liquid cooling pipeline, and heat conductive cooling liquid arranged in the liquid cooling pipeline. The liquid cooling pipeline comprises metal pipelines and insulation pipelines which are arranged alternately. The metal pipelines fit the tab collector sheets of the lithium ion battery pack and are used for conducting the heat of lithium ion battery pack tabs. The insulation pipelines are connected with the metal pipelines. The liquid cooling pipeline also comprises a liquid inlet and a liquid outlet which are closeable and openable and are used for importing and exporting the heat conductive cooling liquid. The heat conductive cooling liquid is insulation liquid with a heat conductive cooling function. According to the device, the tabs at different locations of the lithium ion battery pack are connected through a heat conductive loop, and the heat conductive cooling liquid is injected into the loop. The temperature difference problem of the battery tabs at different locations in the charge / discharge process of the battery pack is solved. The device has good soaking effect, is simple in structure, is easy to disassemble and expand, and is applicable to lithium ion batteries of different combinations.

Description

technical field [0001] The invention relates to the technical field of thermal management of lithium batteries. More specifically, it relates to a liquid-cooled lithium-ion battery pack tab liquid cooling device. Background technique [0002] With the increasingly severe energy and environmental problems, electric vehicles are gradually replacing traditional power vehicles, and electric vehicles have become a major branch of the automotive industry. Due to its excellent rate performance, long life, and safety, lithium-ion power batteries have become the preferred battery for electric vehicles and have been recognized by the entire industry. [0003] In electric vehicles, batteries, motors, and electronic control units are the three most important parts. Among them, the development of battery technology is the most important reason affecting the development of electric vehicles. The power battery acts as an energy store in the electric vehicle, storing the energy in the gr...

AI Technical Summary

Problems solved by technology

During the charging and discharging process of the battery pack, there are temperature differences in the tabs at different positions, which affect the performance of the battery. As an efficient heat dissipation solution, liquid cooling technology has significant advantages in battery temperature control. The liquid cooling device for the battery pack has a complex structure, poor detachability, and an average heat equalization effect on the positive and negative electrodes of the battery

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