Power solutions for the refrigeration unit of new energy freezer trucks

What consequences will occur if the DC - DC module power supply is not used for isolation in the refrigeration unit of a new - energy refrigerated truck?

1. High - voltage breakdown and fire risk (the most serious danger):Fault spread: If an insulation fault occurs in the high - voltage part (such as the compressor drive circuit) inside the unit, the high voltage may directly flow into the low - voltage control circuit. Without electrical isolation, this dangerous high voltage will conduct back along the power lineto the power network of the entire vehicle body, causing damage to other equipment on the vehicle (such as lights, central locking systems, dashboards) due to electrification, and may even ignite the wires.Potential electric shock risk: Although the carriage body is made of metal, there are safety hazards if maintenance personnel come into contact with the vehicle when it is electrified.

2.Damage to the vehicle's core electrical system:Reverse impact: When a serious short - circuit or overload occurs inside the refrigeration unit, the huge fault current will directly impact the vehicle's battery and generator, which may lead to: burning out the vehicle's main fuse or wires, causingthe whole vehicle to be paralyzed.

Damaging the precise on - board ECU (Engine Control Unit) or BCM (Body Control Module), and the repair cost is extremely high.

3.Inability to pass relevant certifications and standards: According to the design specifications, most commercial vehicles and refrigeration equipment require that there must bebasic electrical isolationbetween the high - voltage and low - voltage circuits to meet safety standards (such as the ISO 16750 road vehicle electrical standard, IEC/UL safety regulations). A design without isolation isnon - compliant, and there may be legal and liability risks.