A power battery thermal management system based on thermoelectric cooling

Abstract

The invention discloses a thermoelectric cooling-based power battery thermal management system. The thermoelectric cooling-based power battery thermal management system comprises battery modules, a battery box body used for accommodating the battery modules, thermoelectric semiconductor chips arranged on the two side surfaces of the battery box body via embedding, ribbed radiators arranged on the top ends of the thermoelectric semiconductor chips; square battery cells arranged in the battery box body, connection straps used for connection of the battery cells, composite phase change materials arranged between each two adjacent square battery cells via embedding, skeleton metal meshes arranged in the composite phase change materials, and circuit moulds used for controlling working states of the thermoelectric semiconductor chips. The thermoelectric cooling-based power battery thermal management system is compact in structure, high in safety, and excellent in heat dissipation effect; combination of the composite phase change materials with the thermoelectric semiconductor chips is adopted, so that problems, including battery cell temperature equilibrium and rapid cooling, of battery thermal management systems are solved; at the same time, a low-temperature auxiliary heating problem caused when temperature T is lower than a critical charging temperature in powder battery charging processes is solved; and normal charging of the power batteries is ensured.

Description

technical field [0001] The invention relates to a power battery thermal management system, in particular to a power battery thermal management system based on thermoelectric cooling. Background technique [0002] As the power source of electric vehicles, the power battery has a large capacity and output power. When operating at high magnification and in extreme environments, a lot of heat will be generated. If the heat cannot be dissipated in time, the temperature of the battery will rise rapidly. Excessively high temperature will lead to a decrease in the cycle life of the battery, a serious decline in electrochemical performance, and even cause safety problems such as "thermal runaway" in the battery. Therefore, it is essential to adopt a reasonable thermal management system to improve the cycle life and safety of power batteries. [0003] At present, research at home and abroad mainly focuses on the battery cooling system. The existing battery thermal management systems...

AI Technical Summary

Problems solved by technology

Air cooling Due to the low heat transfer coefficient of air forced convection, this method cannot meet the heat dissipation requirements of the battery when it operates in a high-rate and high-temperature environment

The structure of the liquid cooling system is complex, and there is a potential safety hazard caused by a short circuit caused by the contact between the conductive fluid and the battery

In the heat pipe cooling system, the shape of the heat pipe itself cannot match the shape of the battery well, and the service life of the heat pipe is low, which affects the life of the battery system

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