To provide a method for charging a secondary battery by which the charging state of a battery to be charged can periodically be observed in any kind of the secondary battery and in any charging state of the battery.
After a prescribed voltage Es higher than a full-charged balanced voltage Eeq is applied to the secondary battery 1 for a certain time, the applied voltage is cut and a difference between the prescribed voltage Ws and a no-load voltage E of the secondary battery 1 is detected in this state. The differential voltage Δ is compared with a prescribed determination reference value J, and when the differential voltage Δ is higher than the determination reference voltage J, the prescribed voltage Es higher than the full-charged balanced voltage Eeq is applied to the secondary battery. While the process such as above is repeatedly performed, the charging of the secondary battery 1 is stopped when the differential voltage Δ is not higher than the determination reference value J. A charging time t necessary for reaching full charge is obtained from the differential voltage Δ, and the necessary charging time t is displayed.
| JPS60116512 | [Title of the device] Electronic load device |
| JPH11308776 | BATTERY STATE MONITORING CIRCUIT AND BATTERY DEVICE |
| JP5609842 | Battery monitoring device |
TAKAOKA HIROMI
MATSUI SHIGETOMO
SHIN SANGYO SOUZOU KENKYU KIKO