Electric vehicle gas heating control system and its control method

Abstract

The invention discloses a gas heating control system for an electric vehicle, which includes a gas heater. The gas heater includes a combustion chamber and a hot water core for heat exchange with the combustion chamber. The gas heater also includes a warm air core for heat exchange with the combustion chamber. body, the warm air core is connected in series in the air intake circuit of the passenger compartment, the hot water core is connected in series in the hot water circulation circuit, the hot water circulation circuit exchanges heat with the air intake circuit of the passenger compartment, and the air intake end of the combustion chamber is connected with the air intake circuit of the passenger compartment respectively. The gas intake pipeline is connected to the air intake pipeline, and the hot water circulation circuit is connected in series and parallel with the battery cooling water circuit through the four-way reversing valve. The invention also provides a control method for the gas heating control system of the electric vehicle, which includes a fast heating mode and a battery heating mode. The invention can realize instant heating and fast heating, and improves the energy utilization rate of the system.

Description

technical field [0001] The invention relates to the technical field of electric vehicle thermal management, in particular to an electric vehicle gas heating control system and a control method thereof. Background technique [0002] With the technological development of pure electric vehicles, battery life anxiety has been improved to a certain extent, but pure electric vehicles need to warm up and consume electric energy when charging in winter cold regions, especially the cabin air conditioning and heating consume a lot of electric energy, resulting in a significant decline in the winter mileage of pure electric vehicles . [0003] Chinese patent CN101823416A discloses a gas heating system for an electric vehicle. The system uses a gas heater to heat hot water, exchanges heat with the air in the passenger compartment to achieve heating, and controls the opening of the gas valve by monitoring the temperature of the hot water. degrees to control the power of the gas heater a...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned system has the following problems: 1. Can not realize instant heating

When the temperature is very low in winter, the passenger compartment needs to be heated quickly. The cold water in the liquid storage tank in this system needs to be heated by the gas heater first, and then secondly exchange heat with the air in the passenger compartment through a separate heat exchanger, so The heat exchange efficiency becomes lower throughout the process, and it takes longer for the air in the passenger compartment to be heated to the set temperature

2. The energy utilization rate of the whole system is low

3. The temperature of the passenger compartment cannot be precisely controlled

In this system, the temperature of the heated hot water is kept constant by controlling the power of the gas heater, while the initial temperature of the passenger compartment changes with the ambient temperature, so the temperature of the heated passenger compartment cannot be precisely controlled

Images