A thermal management system for an electric vehicle range extender

Abstract

The invention discloses a thermal management system for the range extender of an electric car, and relates to the technical field of electric car thermal control systems. The thermal management system for the range extender of the electric car comprises an electric driving cooling device which is used for cooling the operating temperature of electrical equipment in the electric car, and supplying a high temperature cooling liquid which is required for preheating for the range extender, and an engine water jacket which is used for preheating the range extender which is not started with the high temperature cooling liquid of the electric driving cooling device when the electric quantity of the electric car is reduced to a given threshold value. According to the thermal management system for the range extender of the electric car, a cooling liquid is used to absorb the excess heat and waste heat of the electromotor and electrical apparatus elements of the electric car, so as to preheat the range extender which is not started, thus the starting performance of the range extender is improved, fuel consumption is reduced and pollutant discharge is reduced.

Description

technical field [0001] The invention relates to the technical field of thermal control systems for electric vehicles, in particular to a thermal management system for range extenders of electric vehicles. Background technique [0002] Due to the shortage of oil resources and the deteriorating environment, people have to consider the transition from traditional internal combustion engine vehicles to new energy vehicles. It is against this background that extended-range electric vehicles were born, which effectively made up for the lack of range of pure electric vehicles. problem, but it also has fuel consumption and emissions problems. Since the range extender is an engine, it starts only when the battery power is lower than the minimum limit. Its operating point is single, generally at medium speed and medium load. Too long, during this process, due to the fact that the temperature of the coolant and lubricating oil has not reached the normal level, the surface temperature ...

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Problems solved by technology

[0002] Due to the shortage of oil resources and the deteriorating environment, people have to consider the transition from traditional internal combustion engine vehicles to new energy vehicles. It is against this background that extended-range electric vehicles were born, which effectively made up for the lack of range of pure electric vehicles. problem, but it also has fuel consumption and emissions problems

Since the range extender is an engine, it starts only when the battery power is lower than the minimum limit. Its operating point is single, generally at medium speed and medium load. Too long, during this process, because the temperature of the coolant and lubricating oil has not reached the normal level, the surface temperature of the intake air and combustion system is not high enough, the formation of the mixed gas is not uniform enough, the combustion is not complete, and the exhaust contains a large amount of hydrocarbons and carbon monoxide , causing great harm to the environment and human health, and due to the low viscosity of the oil at low temperatures, the friction work of the engine is large and the fuel consumption is higher

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