24KW Automotive High Voltage Coolant Heater

PTC electric heater. PTC electric heater is a heater that uses PTC thermistor element as the heat source. PTC thermistors are usually made of semiconductor materials, and their resistance changes sharply with changes in humidity. When the outside temperature decreases, the PTC resistance value decreases, and the heat generation increases accordingly. According to the material, it can be divided into ceramic PTC thermistor and organic polymer PTC thermistor. Ceramic PTC thermistors are used in air conditioning auxiliary electric heaters. Because the PTC thermistor element has the changing characteristics of increasing or decreasing its resistance value as the ambient temperature changes, the PTC heater has the characteristics of energy saving, constant temperature, safety and long service life.

PTC electric heater is an automatic temperature control, power-saving heater. It uses PTC thermosensitive ceramic elements as the heat source and corrugated sheets made of aluminum alloy as the radiator, which are bonded and welded together. .

Electric air conditioning heater PTC generally includes MCU processor, power module Mosfet/IGBT, isolation pre-drive and current detection sensor, etc. The control system transmits the temperature information to the MCU through the temperature sensor. By comparing it with the target temperature input by the button, the MCU continuously adjusts the heater power according to the temperature difference according to the preset program, so that the temperature in the car reaches the set temperature level and the real-time display on the LCD screen Displays interior temperature and set temperature.

With the extensive use of electronic control technology in thermal management, the development of thermal management of electric vehicles will pay more attention to the overall characteristics of electric vehicles. The joint design of thermal management and drive system thermal management will become a key trend in the future.