What is the impact of the working environment of PTC heaters for new energy vehicles?
The influence of the working environment of PTC heaters for new energy vehicles When contacting chemical reagents or using potting materials or fillers, special attention should be paid to the PTC thermistor effect caused by the restoration of barium titanate ceramics, and change the heat transfer conditions excited by the filler. Excessive one-sided temperature will cause the PTC thermistor to be destroyed.
In order to protect the PTC electric heater, the working voltage of the transformer under the large working voltage was determined to be 220V, and considering the influence of power fluctuations, the large working voltage determined the large current. After testing, when the secondary side of the transformer is short-circuited, the primary current of the aging furnace can be achieved. In order to solve the one-sided short circuit of the primary coil, there is a known positive temperature coefficient thermistor for the power transformer overcurrent protection. The primary voltage of the power transformer enters the protected state within 10 minutes. When running in flat housing, the operating ambient temperature of the transformer rises.
When the applied voltage of the PTC heater of the new energy vehicle is missing, the HD series can recover slowly. Since the resistor can be withdrawn, the high resolution positive temperature coefficient thermistor can be reused again and again. After the thermistor is applied, the resistance fluctuates with time during recovery. The resistance is usually that the connection current of dozens of thermistors can be restored to the rated value, and can be reused repeatedly.
Generally speaking, thermistors with small aging furnace area and thickness recover more slowly. Thermistors with large areas and thicknesses are relatively slow to recover. Slow polymer PTC self-healing fuses are simply heated and stepper thermistors. The period of resistance fluctuation is related to its own heat generation and heat dissipation, so its current IH, operating current IT and operating time are disturbed by the ambient temperature.
The electric heating wire is accompanied by the luminescence process in the middle of the heating process, which will lead to inevitable light consumption, oxygen consumption and exhaust emissions, nichrome alloy contains beryllium, beryllium is carcinogenic. Moreover, nickel also has the risk of carcinogenesis and death to the human body, such as porcelain teeth (containing nickel) is harmful to human kidneys. Moreover, the PTC heater PTC products produced by us do not emit light, no open flame, no light oxygen consumption, no exhaust gas generation, harmless to the human body.
