What is the impact of the working environment of the new energy vehicle ptc heater
What impact will the working environment of new energy vehicle PTC heaters have?
The influence of the working environment of the PTC heater of 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 the change caused by the filler Exciting heat transfer conditions. Excessive temperature on one side 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 is measured to be 220V, and considering the influence of power fluctuations, the large working voltage determines the large current. After the test, 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 overcurrent protection of the power transformer. The primary voltage of the power transformer enters the protection state within 10 minutes. When running flat, the working environment temperature of the transformer rises.
When the external voltage of the new energy vehicle PTC heater is missing, the HD series can recover on its own and slower. Since the resistance can be recovered, the high score positive temperature coefficient thermistor can be reused many times. After the thermistor acts, the resistance during recovery fluctuates with time. Resistance is generally that the connection current of dozens of thermistors can be restored to the rated value and can be used repeatedly.
Generally speaking, a thermistor with a smaller area and thickness of the aging furnace recovers more slowly. The thermistor with large area and thickness is relatively slow to recover. The slow polymer positive temperature coefficient self-healing fuse is a kind of simply heating and stepping thermistor. Its resistance fluctuation period is related to its own heating and heat dissipation, so its current IH, working current IT and working time are disturbed by the ambient temperature.
The electric heating wire is accompanied by the light-emitting process in the middle of the heating process, which will lead to the inevitable light consumption, oxygen consumption and exhaust gas emission. The nickel-chromium alloy contains beryllium, which is carcinogenic. Moreover, nickel also has the risk of causing cancer and death to the human body. For example, porcelain teeth (containing nickel) are harmful to the human kidney. Moreover, the PTC heater PTC products for electric vehicles produced by us have no heat, no light, no open flame, no light, no oxygen consumption, no exhaust gas, and no harm to the human body.