A thermal management system and control method for an extended-range electric vehicle

Abstract

The invention relates to the technical field of electric automobiles, in particular to a heat management system of a range-extending type electric mobile, and a control method. The heat management system comprises an engine circulation subsystem, a drive motor circulation subsystem and an air conditioner refrigeration circulation subsystem, wherein the engine circulation subsystem comprises a range-extending engine, a circulation water pump I, a heat radiator I, a cooling fan, an electromagnetic valve I, a heat radiator II, an air blower, a PTC heater, an electromagnetic valve II and a battery pack; the drive motor circulation subsystem comprises a circulation water pump II, an inverter, a drive motor, a range-extending engine and a heat radiator III; the air conditioner refrigeration circulation subsystem comprises a compressor, a condenser, an electromagnetic valve III, a battery pack, an evaporator and an air blower. The heat management system is safe and reliable and is good in heat management effects.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a thermal management system and a control method for an extended-range electric vehicle. Background technique [0002] At present, most of the indoor heating and battery pack heating of extended-range electric vehicles use high-voltage PTC heating schemes. Due to excessive power consumption, this scheme will reduce the driving range of electric vehicles by more than 20%. [0003] In the range-extending mode of the extended-range electric vehicle, the heat generated by the engine is dissipated directly through the radiator, which is not fully utilized. In the indoor heating mode, relying solely on PTC heating to generate heat will consume a large amount of electric energy of the power battery and affect the pure electric driving range. PTC is used to heat the battery pack. When the temperature is extremely low in winter, the discharge capacity of the power battery is lo...

AI Technical Summary

Problems solved by technology

In the indoor heating mode, relying solely on PTC heating to generate heat consumes a large amount of electric energy of the power battery and affects the pure electric driving range

PTC is used to heat the battery pack. When the temperature is extremely low in winter, the discharge capacity of the power battery is low, which limits the heating power of the PTC, and it takes a long time to heat the battery.

Currently, there are mainly two types of cooling for battery packs: air cooling and liquid cooling. Due to the complex internal structure of the battery, neither air cooling nor liquid cooling can quickly cool the battery.

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