Resistance wire liquid heater

Abstract

The invention discloses a resistance wire liquid heater. A control chamber and a heat exchanging chamber are formed in a heater shell. A first voltage plug-in, a first IGBT switch and a first driver which are arranged in the control chamber are sequentially connected. A first voltage sensor and a first current sensor are connected to a circuit between the first voltage plug-in and the first driverin parallel. A heat exchanger shell is provided with a shunt water inlet horn opening and a flow collecting water outlet horn opening. A first resistance wire heating pipe in the heat exchanging chamber is connected with the first driver. The temperature sensor collects medium temperature data to the first driver. A first fuse protector is connected to a power supply circuit of the first resistance wire heating pipe in series and collects the temperature of the first resistance wire heating pipe. According to the resistance wire liquid heater, the targeted diagnosis and drive instructions canbe made according to the situations of voltage, currents and temperatures, the resistance wire liquid heater has the beneficial effect of automatic protection, heat conduction pipes are distributed in the heat exchanging chamber in a staggered manner, it is ensured that each space of the heat exchanging chamber is covered with a temperature field, and a uniform and sufficient heat exchanging effect is achieved.

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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