An electric vehicle thermal management system

Abstract

The invention provides a heat management system for an electric vehicle, comprising a first pipeline loop and a second pipeline loop, heat exchange is performed between the first pipeline loop and the second pipeline loop through a heat exchanger; the first pipeline loop is provided with a brake The resistance heater and the device whose working temperature meets the first temperature condition, the power battery heating device and the device whose working temperature meets the second temperature condition are arranged in the second pipeline loop; the heat exchanger is provided with the first pipeline and the second pipeline, and the second pipeline A pipeline is set in the first pipeline loop, and the second pipeline is set in the second pipeline loop; the temperature value of the first temperature condition is greater than the temperature value of the second temperature condition. In the technical solution provided by the present invention, the equipment with relatively high temperature requirements is arranged in the first pipeline circuit, and the equipment with relatively low temperature requirements and large range changes is arranged in the second pipeline circuit, which not only satisfies various Components have different requirements for temperature, and it is convenient to control the temperature of each component.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle heat management, and in particular relates to an electric vehicle heat management system. Background technique [0002] For new energy buses, especially pure electric buses, due to the limitations of their driving methods, there is no waste heat from the engine to provide warm air for the vehicle during heating in winter, which makes the heating effect of the vehicle poor, especially in winter. As low interior temperatures can seriously affect driver and passenger comfort, measures need to be taken to heat the vehicle. At present, the commonly used heating method on vehicles is to install electric air conditioners and electric auxiliary heating devices on the vehicles, and the two devices are used in conjunction with vehicle heating. However, electric air conditioners and electric auxiliary heating need to use power batteries to power them, which increases the power consumption of the ve...

AI Technical Summary

Problems solved by technology

However, electric air conditioners and electric auxiliary heating need to use power batteries to power them, which increases the power consumption of the vehicle, makes the power consumption of the power battery too fast, reduces the cruising range of the vehicle, and continues to drive under certain working conditions. Mileage drops of up to 30% or more

And because the temperature is very low in the morning in winter, the power battery core temperature is too low to absorb the electric energy fed back by the vehicle for a long time after the vehicle is started, resulting in a further increase in energy consumption after the vehicle is started.

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