In this article, we briefly describe the reasons why the temperature of the PTC heater thermistor of the new energy (electric) vehicle is high. As a professional manufacturer of PTC heaters and air energy auxiliary heaters, we will try our best to organize and publish each Kind of related knowledge, we will serve you wholeheartedly.
The higher the temperature of the PTC thermistor, the higher the voltage and the higher the current, but the lower the resistance value, which will quickly lead to the thermal breakdown of the PTC thermistor. The causes of PTCR electric heater breakdown are mainly divided into: grain boundary breakdown and thermal breakdown. Grain boundary breakdown: Due to the abnormal growth of some grains or uneven distribution of grains, the voltage on some grain boundaries is too large. The breakdown caused by the electric ball valve is called grain boundary breakdown.
In 1963, G. Goodman pointed out that single-crystal BaTiO3 single semiconductors do not show PTC effect, while polycrystalline BaTiO3 ceramics have PTC effect after doping. Since then, PTC is often classified as a grain boundary phenomenon in the world. In PTC components, the crystal grain is a semiconductor, and the grain boundary is an insulating layer, that is, a potential barrier. The external electric field is mainly applied to the grain boundary layer.
The electric boiler system is divided into two types: water storage type and fast heating type. The main difference between the two is: the water storage electric boiler system uses the heater inside the electric boiler to heat water, and then the hot water in the hot water storage tank is used for heating System heat supply; the fast-heating electric boiler does not have a hot water storage tank, and the water is heated directly to the heating system. It can be installed in the kitchen, balcony, basement or attic. The electric ball valve is connected to the radiator through the indoor pipeline, which can realize the dual-channel supply of heating and domestic hot water at the same time. After installing an indoor thermostat, you can adjust the temperature of different rooms at will; you only need to set it in the "low temperature and antifreeze" state when there is no one at home; the startup time can be preset, and you can feel the warmth of home immediately after returning home. Developers can save the capital, land, and human resources used for the construction, planning, and maintenance of the boiler room; reduce air pollution.