Vehicle thermal management system and method for a hybrid electric vehicle

Abstract

The invention discloses a vehicle thermal management system of a hybrid electric vehicle, comprising an expander, a heat exchanger, a condenser, a water tank, a pump, a battery pack heat exchanger, a motor radiator, an engine cooling water jacket, and an engine exhaust heat exchange In the thermal management circuit, by controlling the valve on-off and valve opening, different system operation modes can be adjusted, realizing the series / parallel connection of the electrical system and the thermal management branch of the engine system to meet the heat dissipation requirements and preheating demand, and realize the flow control of each branch to meet the thermal management requirements of HEVs under different driving conditions. The invention simultaneously uses the expander, the condenser and the heat exchanger to realize waste heat recovery and utilization, wherein the heat exchanger is connected with the air conditioner / heat pump system to realize the additional heat management of the power system by the air conditioner / heat pump system. The whole system has a high degree of integration, takes up less space, and is applicable to a wide range of working conditions, which can effectively improve the energy utilization efficiency of the vehicle.

Description

technical field [0001] The invention belongs to the technical field of thermal management of hybrid electric vehicles, and in particular relates to a vehicle thermal management system and method for hybrid electric vehicles. Background technique [0002] In order to improve energy utilization rate, transform energy utilization system, realize electrification, new energy and clean transportation, hybrid electric vehicle has received high attention in recent years, and it is a very advantageous new energy vehicle solution. The core of this technology is to learn from each other and match the motor and the engine so that the car engine can run in a high-efficiency range for a long time and help the engine "peak out of the plateau". Coupled with brake recovery technology, Atkinson cycle, etc., the energy utilization efficiency of the vehicle has been significantly improved. On the basis of this, a reasonable vehicle thermal management system can further improve the energy utili...

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Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a vehicle thermal management system and method for hybrid electric vehicles to solve the problem of the low integration of most current hybrid vehicle thermal management systems and the failure to obtain heat. Reasonable allocation, relatively simple system form, limited working conditions, relatively traditional and simple energy utilization methods, etc.

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