| 摘要 |
<p>Provided is a multiple-battery power supply device in which a plurality of secondary batteries are embedded, an effective using operation is possible independently of the states of charge of the secondary batteries, and, for example, the batteries can be changed over to each other without being affected by the use of the secondary batteries even when charging from a solar panel occurs. When a connectable and disconnectable load switch (SWL) between chargeable and dischargeable secondary batteries (A, B) and a load is turned on, resistors (RA, RB) are connected to the respective secondary batteries (A, B) and the secondary batteries (A, B) are discharged. When the discharging is performed, the terminal voltages of the respective secondary batteries (A, B) are measured and stored. From the descending order (or ascending order) of the stored terminal voltages, a specific one of the secondary batteries (A, B) is selected as one of the secondary batteries (A, B) for supplying power to the load and the power is supplied to the load from the one of the secondary batteries (A, B). At this time, when a load voltage drops to a specific voltage or less, the one of the secondary batteries (A, B) for supplying the power to the load is changed over to one of the secondary batteries (A, B) having the next higher order of the terminal voltage.</p> |
