Hybrid electric vehicle thermal management system and hybrid electric vehicle

Abstract

The invention relates to the technical field of hybrid electric vehicles, and discloses a hybrid electric vehicle thermal management system and a hybrid electric vehicle. The hybrid electric vehicle heat management system comprises a pump body, an engine and a fuel cell stack which are in pipeline connection, wherein the engine is in parallel connection the fuel cell stack and then is connected inseries with a water outlet of the pump body through a first three-way valve; and cooling liquid can flow into an engine and / or the fuel cell stack from the water outlet of the pump body after flowingthrough the first three-way valve and then flow back to the pump body. The hybrid electric vehicle thermal management system is capable of heating the fuel cell stack by utilizing the waste heat of the engine, thus realizing cold start and rapid temperature rise of the fuel cell stack; and in addition, the engine is supported to be rapidly warmed up by utilizing the waste heat of the fuel cell stack, thereby simplifying the system structure and reducing the cost.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a thermal management system of a hybrid electric vehicle and a hybrid electric vehicle. Background technique [0002] A hybrid vehicle that combines fuel cells and internal combustion engines can take into account issues such as emissions, fuel consumption, power, cost, and cruising range. [0003] The temperature is one of the key factors affecting the performance of fuel cells. At low temperature, the various polarizations in the fuel cell are enhanced, and the ohmic impedance is large, which makes the performance of the fuel cell stack deteriorate and the efficiency is reduced, and the water generated by the reaction cannot be discharged in a gaseous state, which easily causes the electrodes to be submerged. When the temperature is at zero When the temperature is below, the inside of the fuel cell stack will also freeze. In the existing technology, it is nec...

AI Technical Summary

Problems solved by technology

In the existing technology, the warm-up time is generally shortened as much as possible by adding a special preheating device or designing a complex cooling cycle system, intelligent cooling system, etc., so as to reduce the fuel consumption and emissions during the warm-up period and prolong the service life of the engine. This method also increases the cost of the thermal management system, which leads to an increase in energy consumption and reduces the efficiency of the thermal management system

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