Voltage monitoring circuit for e.g. hybrid vehicle, has separation device and power supply connected with lower voltage-data outputs, where voltage signal is output to extra-low voltage-data output, which is separated from outputs

摘要

The circuit (20) has batteries (1.1-1.n) connected in series, and potential and measuring signal detection elements (3, 5) with lower voltage inputs, which are connected with potential test points (11.1-12). The elements are arranged to detect potentials at the potential test points and output a voltage value signal to lower voltage-data outputs. A galvanic separation device (7) and a low voltage power supply (8) are connected with the lower voltage-data outputs. The signal is output to an extra-low voltage-data output, which is galvanically separated from the lower voltage-data outputs. The galvanic separation is carried out by Bluetoothmodules. An independent claim is also included for a method for monitoring low voltage sections of an electrical drive.