Thermal insulation method and thermal insulation device for electric vehicle power battery module

Abstract

The embodiment of the invention discloses a thermal insulation method and a thermal insulation device for an electric vehicle power battery module. The thermal insulation method comprises the steps of detecting the temperature and remaining capacity of the power battery module; when the temperature of the power battery module is lower than a predetermined temperature threshold value and the remaining capacity is higher than a predetermined remaining capacity threshold value, detecting the current environmental temperate; determining a minimum thermal insulation water temperature required to maintain the temperature of the power battery module at the current environment to achieve a predetermined minimum temperature; and adjusting a heating element used for heating the power battery module, so as to output hot water with a temperature value equal to the minimum thermal insulation water temperature. The embodiment of the invention can reduce energy consumption, and can also be used in a thermal insulation process at the end of charging and a parking thermal insulation process under a discharged state.

Description

technical field [0001] The invention relates to the technical field of automobiles, and more specifically, to a heat preservation method and heat preservation device for a power battery module of an electric vehicle. Background technique [0002] Energy shortages, oil crises and environmental pollution are intensifying, which have a huge impact on people's lives and are directly related to the sustainable development of the country's economy and society. All countries in the world are actively developing new energy technologies. As a new energy vehicle with reduced oil consumption, low pollution, and low noise, electric vehicles are considered to be an important way to solve the energy crisis and environmental degradation. Hybrid vehicles take into account the advantages of pure electric vehicles and traditional internal combustion engine vehicles at the same time. On the premise of meeting the requirements of vehicle power and mileage, it effectively improves fuel economy ...

AI Technical Summary

Problems solved by technology

However, heating the battery requires high energy consumption, resulting in lower overall charging efficiency

[0005] Moreover, keeping the battery warm in the prior art consumes a lot of energy. Therefore, electric vehicles generally can only keep warm after charging, and cannot perform the heat preservation function without connecting the charging gun.

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