A resistance wire liquid heater

Abstract

The invention discloses a resistance wire liquid heater. A control chamber and a heat exchange chamber are formed in the heater shell; a first voltage plug-in, a first IGBT switch and a first driver in the control chamber are sequentially connected, and the first voltage sensor and the second A current sensor is respectively connected in parallel on the circuit between the first voltage plug-in and the first driver. The shell of the heat exchange chamber is provided with a shunt water inlet bell mouth and a collector water outlet bell mouth. The first resistance wire heating tube in the heat exchange chamber Connected to the first driver, the temperature sensor collects medium temperature data to the first driver, and the first fuse is connected in series on the power supply circuit of the first heating tube to collect the temperature of the first resistance wire heating tube; the resistance wire liquid heater proposed by the present invention It can make targeted diagnosis and drive instructions according to the conditions of voltage, current, and temperature. It has the characteristics of automatic protection. The heat conduction tubes are arranged in a misplaced position in the heat exchange chamber to ensure that every space in the heat exchange chamber is covered by the temperature field, which plays a uniform role. , Adequate heat exchange effect.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle liquid heaters, in particular to a resistance wire liquid heater. 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, wherein the heating element includes a plurality ...

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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