Power battery temperature control system

Abstract

The invention discloses a power battery temperature control system, and belongs to the technical field of power battery heat dissipation, and is used for solving the problems of heat dissipation of ahigh energy density power battery and too big temperature difference of the power battery. The system comprises a pump drive assembly, a condenser, a heater, an electric three-way valve, an evaporative heat collecting assembly and an associated pipeline. The pump drive assembly provides power for a gas-liquid fluid cycle; the condenser discharges heat generated by the evaporation heat collecting assembly to the air environment in a heat dissipation mode; the heater provides heat for rapid heating of the evaporation heat collecting assembly in a heat supply mode; the evaporation heat collectingassembly collects heat efficiently; and the electric three-way valve is used for switching between the low-temperature heat supply mode and high-temperature heat-dissipation mode of the battery. By using two-phase heat transfer and temperature control technology, the system realizes low-temperature heat supply and high-temperature heat dissipation of the power battery, ensures that the power battery operates in a good temperature level and temperature difference range, and can meet the temperature control requirements of various energy density power batteries.

Description

technical field [0001] The invention relates to the technical field of power battery heat dissipation, in particular to a power battery temperature control system. Background technique [0002] Electric vehicles are a zero-pollution means of transportation during operation. Because of their remarkable energy-saving and environmental protection features, they have been valued by the country and the industry. Under the global environment of energy saving and emission reduction, the electric vehicle industry has developed rapidly in recent years. In order to obtain better market reputation and user experience, sufficient cruising range has become an important market measurement index. The acquisition of cruising range is not only about the number of batteries At the same time, higher requirements are placed on the energy density of power batteries. [0003] The power battery is a chemical energy conversion component. Through charging and discharging, it realizes the conversion...

AI Technical Summary

Problems solved by technology

[0003] The power battery is a chemical energy conversion component. Through charging and discharging, it realizes the conversion of grid power to vehicle mileage. The charging and discharging process will generate a lot of heat. If it cannot be dissipated in time, it will cause "thermal runaway", which will cause fire and explosion. ACCIDENT

Due to the low energy density and low heat generation of early power batteries, the temperature level and temperature unevenness of the battery were not significant. With the increase of battery energy density, the above problems became more and more prominent. Natural cooling, forced air cooling, and liquid cooling are suitable for small and medium-sized batteries. The traditional heat dissipation technology for energy density batteries cannot meet the requirements of high energy density batteries for operating temperature and temperature uniformity

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