A pure electric vehicle thermal management system and coolant filling method thereof

Abstract

The invention aims to provide a BEV (battery electric vehicle) thermal management system and a cooling liquid filling method thereof. The BEV thermal management system comprises an electric drive part thermal management sub-system and a passenger bin and battery thermal management sub-system. The electric drive part thermal management sub-system comprises a first overflow kettle, a first water pump, a radiator and an electric drive heat exchanging part, wherein one end of the radiator is connected with the first port of the electric drive heat exchanging part, the other end of the radiator is respectively connected with the first overflow kettle and the first port of the first water pump, and the second port of the electric drive heat exchanging part is respectively connected with the first overflow kettle and the second port of the first water pump. The BEV thermal management system and the cooling liquid filling method thereof have the advantages that effective thermal management of auto parts and accurate cooling liquid filling are achieved; the BEV thermal management system provides a good thermal management function for the electric drive part, a passenger bin and a battery, comfortableness of the passenger bin is guaranteed, and the electric drive part and the battery are enabled to be in an appropriate temperature range.

Description

technical field [0001] The invention belongs to the field of new energy vehicles, and in particular relates to a pure electric vehicle thermal management system and a coolant filling method thereof. Background technique [0002] Cooling and heat dissipation technology is one of the core technologies of vehicle auxiliary systems. It is an important technical guarantee for maintaining the normal operation of power and transmission devices. Its technical level and actual vehicle working conditions will directly affect the realization of vehicle performance indicators. With the development of electric vehicles, especially the promotion and demonstration of pure electric vehicles and the gradual acceptance of electric vehicles by the public, the scope of use of electric vehicles has gradually expanded. Due to the temperature characteristics of the power battery, the ideal operating temperature of the battery is between 10°C and 40°C. When the ambient temperature is outside this t...

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Problems solved by technology

[0003] The thermal management system is one of the important systems for the performance management of pure electric vehicles. The coolant is an integral part of the system. Since the pipelines of the thermal management system are relatively complicated, it is easy to be damaged by residual air in the pipelines during refilling. The amount of coolant added is too small due to the cause

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