Abstract: The invention provides a charging rate adjusting circuit for a cell combination 1 comprising cell modules 11 each comprising one or a plurality of cells and connected in series and adapted to uniformize the cell modules 11 in charging rate. The adjusting circuit comprises a pair of discharge lines 12, 13 extending from opposite electrodes of each cell module 11, a discharge resistor 2 and an on-off switch 3 provided between the discharge lines 12, 13, a timer circuit 4 comprising a CR circuit for feeding a control signal to a gate of the on-off switch 3, and a photocoupler 5 for initiating the circuit 4 into operation in response to a discharge command.

Abstract: For use in a power source device having a cell unit (Vb), the invention provides a leak detecting circuit wherein a line P and a line N extending from the cell unit (Vb) are connected to each other by two P-side voltage dividing resistors (R1A, R1B) and two N-side voltage dividing resistors (R2A, R2B), and the midpoint between the P-side resistors (R1A, R1B) and N-side resistors (R2A, R2B) is grounded. The line P and the line N are also connected to each other by first to third auxiliary voltage dividing resistors (R3, R4, R5). The midpoint between the first and second auxiliary resistors (R3) (R4) and the midpoint between the P-side first and second resistors (R1A) (R1B) are connected to each other by a P-side voltage comparison circuit (V1). The midpoint between the second and third auxiliary resistors (R4) (R5) and the midpoint between the N-side first and second resistors (R2A) (R2B) are connected to each other by an N-side voltage comparison circuit (V2).

Abstract: The invention provides a charging rate adjusting circuit 2 which comprises a serial line 21 for connecting a plurality of cell blocks 11, 12, a switch 22 interposed on the line 21, a plurality of parallel lines 23 for connecting a plurality of parallel connecting points each corresponding to in the cell blocks 11, 12, switches 24 each interposed on each of the lines 23, discharge circuits 28 connected to a opposite electrodes of each of the cell modules, a voltage measuring circuit 26 for detecting voltage across each of the cell modules, and a control circuit. The control circuit, in usual operation, sets on the switch 22 and sets off all the switches 24, while, in adjustment, the circuit sets off the switch 22 and sets on all the switches 24, and sets on the discharge operation of the circuit 28 based on detection result of the circuit 26.

Abstract: The invention provides a charging rate adjusting circuit for a cell combination 1 comprising cell modules 11 each comprising one or a plurality of cells and connected in series and adapted to uniformize the cell modules 11 in charging rate. The adjusting circuit comprises a pair of discharge lines 12, 13 extending from opposite electrodes of each cell module 11, a discharge resistor 2 and an on-off switch 3 provided between the discharge lines 12, 13, a timer circuit 4 comprising a CR circuit for feeding a control signal to a gate of the on-off switch 3, and a photocoupler 5 for initiating the circuit 4 into operation in response to a discharge command.

Abstract: The invention provides a cell voltage measuring device for a cell module wherein component cells are theoretically divided into a plurality of (n) cell blocks 111 to 11n. A plurality of potential detecting lines extending from respective potential detecting points of each of the cell blocks are provided with potential holding means 12 having capacitor blocks each for holding the potentials of the potential detecting points of the cell block, and cell voltage measuring means 14 for measuring the voltage of the cells based on the potentials of the potential detecting points held by the potential holding means 12. Flying capacitors are provided for each cell block.

Abstract: The invention provides a cell voltage measuring device for a cell module wherein component cells are theoretically divided into a plurality of (n) cell blocks 111 to 11n. A plurality of potential detecting lines extending from respective potential detecting points of each of the cell blocks are provided with potential holding means 12 having capacitor blocks each for holding the potentials of the potential detecting points of the cell block, and cell voltage measuring means 14 for measuring the voltage of the cells based on the potentials of the potential detecting points held by the potential holding means 12. Flying capacitors are provided for each cell block.