| 摘要 |
FIELD: electrical engineering. SUBSTANCE: state-testing device is meant be used for voltage testing of each cell of chemical cells connection and branch of cells parallel connection switching-out of circuit in case when voltage strength of one of them, at least, is lower than allowed value. Voltage testing of every cell is made with aid of photon-coupled pair composed by light-emitting diode and photosensitive transistor. Current of light-emitting diode is proportional to voltage on terminals of corresponding cell. If voltage of some cell drops lower than allowed value is, light flow of corresponding light-emitting diode diminishes so to be insufficient to maintain open state of photosensitive transistor. In result current detector initiates switching-out of corresponding branch connection of battery. Device has control circuit operating by the same voltage testing assembly using for any branches of cells parallel connections short-time reclosing to minimize testing circuits number. EFFECT: higher reliability of operation, less equipment expenditure. 1 cl, 1 dwg |
