Integrity determination device for high voltage battery charging system of electrical vehicle, has control device computing resistance value of resistors based on calibrated voltage supply to determine whether resistors are in charged state

摘要

The device (10) has a high voltage measurement circuit (14) comprising charged resistors (RD1-RDn, RU1-RUn) to reduce a high voltage signal received by the circuit, into a suitable voltage signal, which is to be provided to an analog-to-digital converter (ADC) (12) to measure high voltages (VM1-VMn) in a normal operation mode. A control device (20) supplies a calibrated voltage to the resistors in a calibration mode, and computes a resistance value of the resistors based on the supply of the calibrated voltage to the resistors to determine whether the resistors are in a charged state. An independent claim is also included for a method for determination of integrity of an electrical device in a vehicle.