Direct-cooling and liquid-heating type battery thermal management system for electric vehicle, control method and electric vehicle

Abstract

The invention discloses a direct-cooling and liquid-heating type battery thermal management system for an electric vehicle, a control method and the electric vehicle. The system comprises a heat conduction pad covering a battery pack, a heating liquid channel, a cooling liquid channel, a thermal management controller and a battery temperature sensor arranged on the battery pack, wherein the cooling liquid channel is communicated with at least one refrigeration module, the cooling liquid channel is communicated with the heat conduction pad, the heating liquid channel is communicated with at least one heating module, the heating liquid channel is communicated with the heat conduction pad, the battery temperature sensor is in communication connection with the thermal management controller, the thermal management controller drives or stops driving the heating module to supply heat to the heating liquid channel through a heating liquid and controls the heating power of the heating module, and the thermal management controller drives or stops driving the refrigeration module to supply cold to the cooling liquid channel through a refrigerant and controls the cooling power of the refrigeration module. According to the invention, the refrigerant directly flows in the cooling liquid channel and enters the battery pack for heat exchange. The heat source is outside the battery pack, thereby being safe and reliable.

Description

technical field [0001] The invention relates to the technical field related to automobiles, in particular to a direct-cooling liquid thermal battery thermal management system for electric vehicles, a control method, and an electric vehicle. Background technique [0002] In winter and summer, due to the emergence of extreme temperatures, the performance of the battery will be affected, so that there will be a certain difference between the cruising range and the official cruising range. [0003] For example, at low temperatures, especially below 0°C, the performance of lithium-ion batteries will drop sharply due to factors such as the deterioration of the dynamic conditions of the positive and negative electrodes, the increase in the viscosity of the electrolyte, and the decrease in conductivity, resulting in a decrease in the discharge capacity of the battery at low temperatures. What's more serious is that low-temperature charging can easily lead to lithium deposition at th...

AI Technical Summary

Problems solved by technology

[0011]Based on this, it is necessary to provide a direct-cooling liquid thermal battery thermal management system for electric vehicles in view of the technical problems of the prior art such as slow battery cooling speed and single heating heat source System, control method and electric vehicle

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