Selection of pre-charge resistor for energy storage high voltage box

What is a precharge resistor?

PREcharge resistors are typically used in the battery junction box to limit the charging current of the DC-Link capacitor. The PREcharge resistor must withstand the high energy pulse up to 1000 volts. Miba PREcharge resistors can withstand this single pulse event without heat sink. The products are designed and

What is high-voltage solid-state relay active precharge reference design?

The High-Voltage Solid-State Relay Active Precharge Reference Design (Rev. A) is an innovative circuit topology designed to precharge large DC link capacitors for hybrid electric vehicles (HEV) and electric vehicles (EV).

What is a pre-charge resistor & SW1?

The pre-charge resistor value has a key role at defining the pre-charge duration time. The higher the resistance, the slower the pre-charge. The Lower the resistance, the Higher the current. RELAY 1 prevents leakage current in Disconnect Mode. SW1 is used to detect SHORT circuit on HV DC Bus. Capacitor is charging thru SW1 that is activated by MCU.

Why is using a resistor for precharge inefficient?

Using a resistor for the precharge is not very efficient and the increased power loss leads to more heat and increased temperature rise. In addition, using a resistor for the precharge is not very efficient and the increased power loss leads to more heat and increased temperature rise.

Why is my pre-charge resistor failing?

The pre-charge resistor failing due to over-heating then needs to be at least considered. In a battery the contactors are a switch that can be operated by the control system. They are essentially a relay. These contactors are designed to be able to break (switch off) the circuit under full load (maximum current and at maximum system voltage).

What are durakool's high power pre-charge & discharge resistors?

Durakool’s range of automotive grade high power pre-charge & discharge resistors are available with power ratings from 20W to 500W. A different package styles & types. Customisable, with non-inductive windings, HV cables, compact and intrinsically safe options available.