A centralized multi-condition thermal management system for new energy vehicles

Abstract

The invention relates to a centralized multi-operating-condition thermal management system of a new energy vehicle. The centralized multi-operating-condition thermal management system comprises a refrigerant circuit and a cooling liquid circuit; the refrigerant circuit comprises a compressor, a condenser connected with the compressor, a passenger compartment refrigerant branch circuit and a power battery pack refrigerant branch circuit, wherein the passenger compartment refrigerant branch circuit and the power battery pack branch circuit are connected to the two ends of the compressor and the condenser in parallel; the passenger compartment refrigerant branch circuit comprises an electromagnetic valve and an evaporator for heating a passenger compartment; the power battery pack branch circuit comprises an electromagnetic valve and a heat exchanger for lowering the temperature of cooling liquid; the cooling liquid circuit comprises a PTC heater, a passenger compartment cooling liquid branch circuit and a power battery pack cooling liquid branch circuit, wherein the passenger compartment cooling liquid branch circuit and the power battery pack cooling liquid branch circuit are connected to the two ends of the PTC heater in parallel; the passenger compartment cooling liquid branch circuit comprises a pump and a heater for heating the passenger compartment; the power battery pack cooling liquid branch circuit comprises an electromagnetic valve, a pump, a heat exchanger, a power battery pack, a reflux valve and a one-way valve. According to the centralized multi-operating-condition thermal management system of the new energy vehicle, one set of refrigerating / heating elements can be used for conducting independent thermal management on the passenger compartment and the power battery pack of the new energy vehicle.

Description

technical field [0001] The present invention relates to a thermal management system, in particular to a centralized thermal management of a new energy vehicle for a passenger compartment and a power battery pack by using the same set of cooling / heating elements, and the thermal management of the passenger compartment and the power battery pack can be Centralized multi-condition thermal management system for new energy vehicles that operate independently. Background technique [0002] Early new energy vehicles used an independent thermal management system, which divided the thermal management system of the passenger compartment and the thermal management system of the power battery pack into two independent parts. Although this thermal management system can meet the thermal management requirements of the passenger compartment and the power battery pack separately, since both systems need to meet their own thermal management requirements, the system is redundant and the perfor...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: when cooling the passenger compartment, the system can only provide cooling thermal management for the power battery pack; when heating the passenger compartment, the system can only provide heating thermal management for the power battery pack. thermal management

In this way, the function of the thermal management system is limited, and it cannot provide corresponding thermal management in time according to the actual needs of the power battery pack. Therefore, some centralized thermal management systems add a separate heating device for the power battery pack to solve this problem. One problem, but this increases the complexity and cost of the system

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