When the PTC heater is turned on, the time characteristics and the surface temperature rise characteristics of the heater can be measured. It can be seen that due to the PTC characteristics, the surface temperature of the heater or the temperature field of the thermal system established with the heater as the center, when the heat balance is achieved, the measured temperature is close to constant = the heater can still maintain constant temperature and heat even though the working electric field is strong, the environmental dissipation conditions or the heat load will change within a certain range.
The maximum value of electrolysis, the steady-state operating current, and the surface temperature of the heater are related to the effective heat dissipation factors of the PTC heater (such as the material heat transfer conditions of the heat transfer plate, heat dissipation area, and clamping mechanical state, etc.). In general, for the same PTC element, under the same electric field strength and environmental conditions, affected by the limited heat dissipation factors, the better the heat dissipation conditions, the longer the time to reach the maximum value of the current and the greater the maximum current value (Unless a fast-response instrument is used for measurement), and the steady-state current value finally reached is also higher. However, high surface temperatures still need to be obtained through a number of enhanced heat transfer methods.