A waste heat recovery vehicle thermal management system for extended-range hybrid electric vehicles

Abstract

The invention relates to the technical field of automobile thermal management, in particular to a waste heat recovery type vehicle thermal management system for an extended-range hybrid electric vehicle. It includes an electric drive circulation module and a battery pack circulation module; the first electric drive pipe in the electric drive cycle module is connected in series with an electric drive water pump, an electric drive system, and a low-temperature radiator, and the second electric drive pipe and the outlet end of the low-temperature radiator Connected; the outlet end of the first battery pipeline in the battery pack circulation module communicates with the battery pack, the first battery pipeline is provided with a battery water pump, and the inlet end of the second battery pipeline communicates with the battery pack; the first electric drive pipeline, the second A four-way valve is set between the electric drive pipeline, the first battery pipeline and the second battery pipeline; the four-way valve is set to make the second electric drive pipeline directly communicate with the first battery pipeline in the electric drive waste heat recovery mode, so that the second The battery conduit communicates directly with the first electric drive conduit. The heat management system of the invention has simple structure and high heat control efficiency.

Description

A vehicle thermal management system for extended-range hybrid electric vehicle with waste heat recovery technical field The present invention relates to the technical field of automobile thermal management, and specifically refers to a waste heat recovery type of a range-extended hybrid electric vehicle. Vehicle thermal management system. Background technique The extended-range hybrid vehicle is to provide electric energy for the battery through the engine power generation, and the battery is used as the direct power of the vehicle. The source of a vehicle model, the extended-range hybrid vehicle is compared with the traditional gasoline vehicle, because the structure is completely different, its structure is completely different. The thermal management method is also completely different from the thermal management method of gasoline vehicles. The temperature difference between the engine cooling system loop and the battery cooling system loop is too large, complete...

AI Technical Summary

Problems solved by technology

[0003] 1. The waste heat of the engine is not used for heating the battery pack, resulting in energy loss;

[0004] 2. The battery pack is heated by an electric heater (such as PTC), which results in large energy loss, a sharp drop in the pure electric cruising range of the vehicle, and high vehicle cost

[0006] However, this solution cannot achieve active heating of the battery under pure electric low-temperature fast charging conditions, resulting in a much longer charging time. In addition, the engine cooling circuit is connected to the warm air and water circuit, resulting in poor thermal efficiency of PTC heating under low temperature conditions.

Images