SECONDARY BATTERY PACK CONNECTION CONTROL METHOD, POWER STORAGE SYSTEM, AND SECONDARY BATTERY PACK
First Claim
1. A secondary battery pack connection control method for controlling connection of the input and output terminals of a secondary battery pack system in a power storage system provided with a plurality of secondary battery packs, said method comprising steps of:
- starting discharge while controlling current from a first secondary battery pack that is to be newly connected; and
turning OFF the charging path of a second secondary battery pack that is to be disconnected and in which voltage is lower than in said first secondary battery pack.
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Abstract
A power storage system has a plurality of secondary battery packs and a host device. The secondary battery packs each have: secondary batteries; a charge switch means that turns a charging path to the secondary batteries ON and OFF; a discharge switch means that turns a discharging path from the secondary battery ON and OFF; and a current-limiting means that causes the secondary battery to discharge while limiting the current to, or below, a fixed value. When switching from the secondary battery pack connected to the input/output terminals of the system to a first secondary battery pack in which voltage is higher than in the second secondary battery pack, the host device causes the charge switch means of the second secondary battery pack to turn OFF the charging path while in a state in which the current limiting means of the first secondary battery pack will cause a discharge operation to begin while limiting the flow of current.
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Citations
3 Claims
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1. A secondary battery pack connection control method for controlling connection of the input and output terminals of a secondary battery pack system in a power storage system provided with a plurality of secondary battery packs, said method comprising steps of:
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starting discharge while controlling current from a first secondary battery pack that is to be newly connected; and turning OFF the charging path of a second secondary battery pack that is to be disconnected and in which voltage is lower than in said first secondary battery pack. - View Dependent Claims (2)
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3. A secondary battery pack connection control method for controlling connection of the input and output terminals of a secondary battery pack system in a power storage system provided with a plurality of secondary battery packs connected in parallel, said method comprising steps of:
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starting discharge while controlling current from a first secondary battery pack that is to be newly connected; turning OFF the charging path of a second secondary battery pack that is to be disconnected and in which voltage is lower than in said first secondary battery pack, wherein; the discharging path of said first secondary battery pack is turned ON at the same time that the charging path of said second secondary battery pack is turned OFF; and the discharging path of said second secondary battery pack is turned OFF.
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Specification