A power source device comprises a cell unit 12 comprising a plurality of cells 12a. Connected between a positive side terminal and a negative side terminal of the cell unit 12 is a first current line 34 having two voltage dividing resistors 30, 32 interpos...

Method for monitoring rechargeable lithium cells to ensure their correct recharging in which cell voltage and temperature are measured. If threshold values for voltage and temperature are simultaneously exceeded discharging of the cell is triggered until a...

A secondary battery device is disclosed comprising: a secondary battery for supplying electric power into a load circuit; a load state judging unit for judging an operation state of said load circuit; and an overdischarge protective unit connected to said ...

A power storage device has a plurality of series-connected storage battery units (101), battery circuits (102) associated with the storage battery units to control or monitor the storage battery units, respectively; a main circuit (104) of a potential leve...