Whole vehicle thermal management system and method of hybrid electric vehicle

Abstract

The invention discloses a whole vehicle thermal management system of a hybrid electric vehicle. The whole vehicle thermal management system comprises an expansion machine, a heat exchanger, a condenser, a water tank, a pump, a battery pack heat exchanger, a motor radiator, an engine cooling water jacket, an engine tail gas heat exchanger, a valve and other components, different system operation modes can be adjusted by controlling the opening and closing and the opening degree of the valve in a thermal management circuit, and connection in series / in parallel of an electric system and engine system thermal management branches is realized, the heat dissipation requirement and the preheating requirement are met, and the flow regulation of each branch is realized to adapt to thermal managementrequirements under different driving conditions of the hybrid electric vehicle. According to the whole vehicle thermal management system, the expansion machine, the condenser and the heat exchanger are simultaneously used, and waste heat recovery and utilization are realized. The heat exchanger is connected with an air conditioner / heat pump system to realize additional thermal management on a power system. The whole system is high in integration level, small in occupied space and wide in application working condition, and can effectively improve the energy utilization efficiency of the wholevehicle.

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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