A low-temperature heating system and control method for a power battery of a hybrid electric vehicle

Abstract

The invention discloses a low-temperature heating system for a power battery of a hybrid electric vehicle and a control method. The system simultaneously comprises an engine high-temperature cooling loop and a battery low-temperature heating loop, wherein a temperature sensor is used for acquiring the temperatures of an engine water tank and the power battery, an electronic control unit (ECU) is used for controlling the linkage of a solenoid valve according to a sensor signal and a control strategy, so that the connection / disconnection and the switching of the two loops are achieved, and recyclable regulation is proceeded; and meanwhile, the functions of automatic water cooling of an engine and automatic heating of the power battery are achieved, thus, the battery can be heated to an ideal temperature in a low-temperature environment, the battery favorably works at the optimal performance temperature point, the power battery is protected, and the advantages of electrical energy driving and oil saving of the hybrid electric vehicle are also fully developed.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a low-temperature heating system and control method for a power battery of a hybrid electric vehicle. Background technique [0002] The working performance of the power battery is greatly affected by temperature. Usually, in areas where the ambient temperature is too low, the power battery cannot work normally, which greatly affects the working status of the vehicle. At the same time, when the automobile engine is working, a large amount of heat accumulation is generated, which affects the working state of the engine. It needs to be cooled and removed by the cooling system, and there is a certain waste of energy. Due to its special structure, hybrid electric vehicles have two major power components, the engine and the power battery. A large amount of heat loss during engine cooling is avoided. Contents of the invention [0003] The object of the present inven...

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Problems solved by technology

[0002] The working performance of the power battery is greatly affected by the temperature. Usually, in areas where the ambient temperature is too low, the power battery cannot work normally, which greatly affects the working status of the vehicle.

At the same time, when the automobile engine is working, a large amount of heat is generated, which affects the working state of the engine. It needs to be cooled and removed by the cooling system, and there is a certain amount of energy waste.

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