Necessary conditions for 24kw PTC heater
(1)The heater is controlled by CAN communication
(2)High voltage power supply
(3)Low voltage power supply (BATT) or Kl15 (ignition switch voltage), Kl31 (GND)
(4)The heater needs to set a high voltage interlock circuit
(5)The vehicle must be equipped with an insulation monitoring device to monitor:
b: Short circuit protection (current-limiting fuse in distribution box)
(6)High voltage electric heater must be equipped with 80A current-limiting fuse
(7)It must be ensured that the high voltage power supply has no reverse polarity
(8)The vehicle needs to be powered off when overvoltage occurs
(9)High voltage input should be precharged
(10)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.
The heater uses a low TC(215 degree ) PTC element, which limits the maximum temperature that the system can reach (without control circuits), which is within the temperature range that the surrounding components can withstand (even under the worst conditions).
