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Electronic Precharge Relay

The EPR is applied to the Power Relay Assembly (PRA) of the Battery System Assembly (BSA) in a high-voltage battery system. Composed of an electronic circuit that is operated electrically, it is briefly operated. The EPR prevents damage to internal components caused by high voltage/high current when electrically connecting the high voltage battery and the circuit on the inverter side in a system. To this end, the EPR turns on/off the precharging operation to limit the initial inrush current to the inverter by delaying the voltage charging time for the inverter.

Features
No degradation of function from contact deterioration
Less noise from switching and electromagnetic induction
Relatively few parts and simple processes
Products with relatively light weight
Changes in specifications can be handled by device replacement.
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