Isolated single circuit for high voltage dc bus voltage sensing and passive discharging

Abstract

Certain disclosed technology relates to automotive power systems and methods for energy management and voltage monitoring. A system includes a traction battery, a resistor bank, an inverter electrically connected between the battery and resistor bank, and a capacitor positioned to stabilize voltage. Circuitry integrated into the system features an optocoupler driven by the current through the resistor bank, generating an output voltage that is electrically isolated from the inverter and indicative of the traction battery's voltage. A method involves using the optocoupler to produce an output voltage reflective of the DC bus voltage, achieved through the resistor bank connected in parallel with the traction battery. Additionally, the system supports current monitoring with the optocoupler providing output current proportional to the current flowing through the resistor bank and DC bus.

Dependencies are inferred from the claim text.