A resistance wire liquid heater for thermal management of new energy vehicles

Abstract

The invention discloses a resistance wire liquid heater for heat management of a new energy vehicle. The heater housing is separated to form a control room and a heat exchange room; the low-voltage plug-in in the control room is connected to the driver assembly, and the high-voltage plug-in is connected to the first IGBT switch and the first IGBT switch. The second IGBT switch is connected, the first IGBT switch and the second IGBT switch are both connected to the driver assembly; the heat exchange chamber is equipped with a high-voltage resistance wire heating tube and a low-voltage resistance wire heating tube connected to the driver assembly, under the first working state , the voltage sensor controls the working voltage to be transmitted to the high-voltage resistance wire heating tube through the first IGBT switch and the driver assembly, and the high-voltage resistance wire heating tube starts heating; in the second working state, the voltage sensor controls the working voltage to pass through the second IGBT switch and the driver assembly The finished product is transmitted to the low-voltage resistance wire heating tube, and the low-voltage resistance wire heating tube starts heating to meet the heating demand of the power battery at low voltage and the high voltage demand under normal full charge, intelligent identification, to achieve the best intelligent utilization Rate.

Description

technical field [0001] The invention relates to the technical field of liquid heaters for new energy vehicles, in particular to a resistance wire liquid heater for thermal management of new energy vehicles. Background technique [0002] With the rapid development of electric vehicles in recent years, safety, efficiency, battery life, and intelligence are particularly important in the popularization of electric vehicles. Car companies have designed battery thermal management systems for power batteries, and air-conditioning thermal management systems for heating and defrosting. The liquid heater is an important part of the battery thermal management system and the air conditioner thermal management system. The current existing liquid heater technologies are as follows: [0003] A PTC electric heating tube and an electric vehicle water heating heater are characterized in that it includes a heating element, an electrode plate, a solid insulating layer, a spacer and a metal tube...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned patent is only a scheme form of the PTC heating tube body, but the key points for application in new energy vehicles are safety, efficiency, and intelligence, which require multiple safety protection designs to form intelligent information interaction with the vehicle. The temperature requirements of the actual vehicle and the battery information signal make the most efficient and safe heating output; therefore, this patent has no control method, no efficient assembly design, no safety protection measures, etc.; in addition, the PTC heating sheet and the There are certain disadvantages in the technology of sticking the electrode plate to the electrode plate. The reason is that the original wave-shaped electrode plate cannot guarantee high-precision flatness after being drawn and deformed, so that it cannot be in effective surface contact with the PTC heating sheet, and the electrode will expand after thermal expansion and contraction after aging. It is prone to the problem of small ignition and arcing on the contact surface, which will cause heavy losses to the car

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