Electric vehicle power battery heat management device based on semiconductor refrigeration technology

Abstract

The invention relates to an electric vehicle power battery heat management device based on a semiconductor refrigeration technology. The electric vehicle power battery heat management device is arranged in a battery cell module, and a gap is reserved between the heat management device and the battery cell. The electric vehicle power battery heat management device comprises a semiconductor chillingplate, two fixedly connected radiators, a controller and heat-conducting elements, wherein heat or cold produced by the semiconductor chilling plate is uniformly distributed on the radiators by virtue of the heat-conducting elements; the two radiators are respectively arranged at a heat end and a cold end of the semiconductor chilling plate; a plurality of heat-conducting elements are respectively connected between the heat ends or cold ends of the radiators and the semiconductor chilling plate in a pressing manner; and the controller is connected with the semiconductor chilling plate by a wire and controls the semiconductor chilling plate to be heated or chilled by switching the voltage polarity. According to the electric vehicle power battery heat management device disclosed by the invention, with the adoption of a semiconductor electronic technology, heating and cooling functions are realized by switching the voltage polarity, and the two radiators are respectively arranged on twoside faces of the semiconductor chilling plate, so that the heat transfer efficiency is improved. Moreover, the heat-conducting elements are respectively connected between the radiators and the semiconductor chilling plate in a pressing manner, and the heat-conducting efficiency between the semiconductor chilling plate and the radiators is improved.

Description

technical field [0001] The invention relates to a thermal management device for a power battery of an electric vehicle, in particular to a thermal management device for a power battery of an electric vehicle based on semiconductor refrigeration technology. Background technique [0002] The power battery is the only power source for pure electric vehicles, and its working performance and service life are greatly affected by the ambient temperature. In a high-temperature environment, the generation of irreversible reactants inside the battery accelerates, and the increase in irreversible reactants leads to an accelerated decrease in the available capacity of the battery. When the available capacity of the battery is less than 80% of the rated capacity of the battery, the life of the battery ends; the battery in a low-temperature environment Under high charge and discharge, the internal resistance of the battery will increase, the discharge voltage platform will decrease, the a...

AI Technical Summary

Problems solved by technology

Generally, flexible heating film or PTC is used for heating, and air cooling or liquid cooling is used for heat dissipation. There are many devices involved, and the protection is complicated, which reduces the reliability of the system and increases the risk of failure, and the cost is high.

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