PTC coolant heater Product characteristic
1.Product characteristic
Life cycle of 8 years or 200,000 kilometers;
The accumulated heating time in the life cycle can reach up to 8000 hours;
In the power-on state, the working time of the heater can reach up to 10,000 hours (Communication is the working state);
Up to 50,000 power cycles;
The heater can be connected to constant electricity at low voltage during the whole life cycle. (Usually ,when the battery is not depleted; the heater will go into sleep mode after the car is turned off);
Provide high-voltage power to the heater when starting the vehicle heating mode;
The heater can be arranged in the engine room, but it cannot be placed within 75mm of the parts that continuously generate heat and the temperature exceeds 120℃.
2.Necessary conditions for heater
The heater is controlled by CAN communication
High voltage power supply
Low voltage power supply (BATT) or Kl15 (ignition switch voltage), Kl31 (GND)
The heater needs to set a high voltage interlock circuit
The vehicle must be equipped with an insulation monitoring device to monitor
Over (under) voltage protection
Short circuit protection (current-limiting fuse in distribution box)
Leakage protection
Interlock response
High voltage electric heater must be equipped with 30A current-limiting fuse
It must be ensured that the high voltage power supply has no reverse polarity
The vehicle needs to be powered off when overvoltage occurs
High voltage input should be precharged
The high voltage input should be equipped with a relay, when a serious fault occurs, the high voltage can be cut off without affecting the safety of the whole vehicle
