SAFETY CIRCUIT FOR A POWER SYSTEM OF A VEHICLE AND METHOD FOR CONTROLLING THE SAFETY CIRCUIT

DRIVE March 24, 2022
Source
A safety circuit () for a power system () of a vehicle (), the safety circuit comprising: a hazardous voltage interlock loop (HVIL) circuit () configured to disconnect a high-voltage energy source () from a high-voltage system (), the HVIL-circuit comprising a contactor () and a HVIL control unit (); a current meter () arranged to measure a current; a fuse (); a switching circuit () controlling the contactor of the HVIL-circuit; and a safety circuit control unit () connected to the current meter and to the switching circuit for controlling the contactor, wherein the safety circuit control unit is configured to: if the HVIL control unit provides a control signal to the switching circuit to open the contactor, and if the current measurement exceeds a first threshold current value, control the switching circuit to delay the opening of the contactor by a controllable time period.

Discussion in the ATmosphere

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