Electric vehicle temperature control system

Abstract

The invention provides an electric vehicle temperature control system comprising a power battery, a drive system, an air conditioner, a battery cooler and first, second and third multi-channel valves.The power battery is connected between the first multi-channel valve and the third multi-channel valve. The drive system is connected between the second multi-channel valve and the third multi-channel valve. The drive system, the second multi-channel valve, the third multi-channel valve, the first multi-channel valve and the power battery form a first heating circuit. The battery cooler is used for thermal interaction between the battery coolant and the refrigerant of the air conditioning refrigeration circuit. The battery cooler is also respectively connected with the power battery and the first multi-channel valve. The first multi-channel valve is also connected with the third multi-channel valve. The third multi-channel valve, the first multi-channel valve, the battery cooler and the power battery form a first cooling circuit. The temperature control system realizes rapid cooling of the power battery and uses the waste heat of the drive system to heat the power battery so as to improve the energy utilization rate of the system.

Description

technical field [0001] The invention relates to the field of electric vehicle temperature control, in particular to an electric vehicle temperature control system. Background technique [0002] Determined by the characteristics of the battery, when the temperature of the electric vehicle power battery is too low or too high, the working state is very unsatisfactory. For example, the ambient temperature is too low, resulting in poor battery activity, low work efficiency, and poor charge and discharge performance; Therefore, electric vehicles have a temperature management system to regulate the temperature of the power battery and drive system to make them work at an appropriate temperature. The existing temperature control system is mostly divided into two modules, one module cools or heats the battery alone, and the other module cools the drive system. The energy utilization rate of the above-mentioned temperature control system is low, and the heat generated by the drive s...

AI Technical Summary

Problems solved by technology

The energy utilization rate of the above-mentioned temperature control system is low, and the heat generated by the drive system is not effectively utilized. For example, when the ambient temperature is low, the drive system generates a lot of heat and needs to be dissipated. The cooling efficiency of the battery in the temperature control system is low. For example, when the ambient temperature is high or the battery is quickly charged for a long time, the temperature rises rapidly, and rapid cooling is required. However, the above-mentioned temperature control system is difficult to quickly control the battery temperature within the ideal range.

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