Power battery thermal management system based on tab liquid cooling mode

Abstract

The invention aims to provide a power battery thermal management system based on a tab liquid cooling mode. The system comprises a battery module, a tab liquid cooling plate, a liquid storage tank, aheater, an internal circulation water pump, an external circulation water pump, a compressor, a condenser, an expansion valve, an evaporator and a plate heat exchanger, and a battery tab liquid cooling unit, a compressor unit main refrigeration unit, a plate heat exchanger auxiliary cooling unit, a liquid cooling internal circulation unit and a liquid cooling external circulation unit are formed.According to the power battery thermal management system based on the tab liquid cooling mode, circulating refrigerants are dispersed and preheated at the tabs of the battery, so that the heat exchange thermal resistance can be greatly reduced, quicker heat exchange of the battery is facilitated, the thermal management efficiency is improved, and the system integration degree is high.

Description

technical field [0001] The invention relates to a power battery thermal management system. Background technique [0002] In recent years, the consumption of automobiles in China has driven oil consumption, and China's oil consumption demand has continued to grow. However, the amount of domestically produced oil is limited, and the amount of self-produced oil is showing a downward trend year by year. In 2017, China's carbon dioxide emissions ranked first in the world, and the total emissions were twice that of the United States. China promised at the Paris Climate Conference that in 2030, the carbon dioxide emissions per unit of GDP will drop by 60-65% compared with 2005, and by 2030 Carbon dioxide emissions will peak around 2010, and efforts will be made to reach the peak as soon as possible. In the next ten years, China's economic development and production will need to be based on renewable energy, and there will be great pressure on environmental protection and emissions...

AI Technical Summary

Problems solved by technology

However, at present, most power batteries are composed of positive electrodes, separators, negative electrodes and battery casings, and the thermal conductivity of the separator material is low, and the thermal resistance from the inside of the cell to the vertical surface is large, and the thermal conductivity is poor. The effect is not good, and the connecting posts of the positive and negative poles of the battery are directly connected to the current collector plates of the positive and negative poles of the battery, and the positive pole of the battery is made of aluminum, and the negative pole is made of nickel, copper or nickel-plated copper. Aluminum and copper have high thermal conductivity. Small thermal resistance, good heat transfer performance

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