An object is to reliably conduct cell balancing operation while suppressing deterioration of batteries and maintaining operating efficiency. When the cell balance control by the cell balancing circuit 3 is started, the system control device 30 sets an on/off device corresponding to the arm where the cell balance control is conducted to the open state; and when the cell balance control is completed, and the difference between the terminal voltage of a battery pack of the arm where the cell balance control has been conducted and the terminal voltages of the battery packs of the other arms falls within a preset allowable range, sets the on/off device, which has been in the open state, to the closed state.

Claims

18 · 3 independent · depth 3

18 granted claims

›1.independentA power storage system comprising:na plurality of battery modules that are connected in parallel and that are connected to a power converter that cont…+6

›3.↳ 1A power storage system according to claim 1, further comprising:na charge/discharge device that adjusts a voltage of each of the battery packs, wherei…d2

›4.↳ 1A power storage system according to claim 1 wherein, when the cell balance control by the cell balancing circuit is started, the control unit sets the…d2

›9.↳ 1A power storage system according to claim 1, wherein there is a maximum number of battery modules capable of conducting the cell balance control simul…d2+3

›2.independentA power storage system comprising:na plurality of battery modules that are connected in parallel and that are connected to a power converter that cont…+6

›13.↳ 2A power storage system according to claim 2, further comprising:na charge/discharge device that adjusts a voltage of each of the battery packs,wherein…d2

›14.↳ 2A power storage system according to claim 2 wherein, when the cell balance control by the cell balancing circuit is started, the control unit sets the…d2

›15.↳ 2A power storage system according to claim 2, wherein there is a maximum number of battery modules capable of conducting the cell balance control simul…d2+3

›5.independentA power storage system comprising:na plurality of battery modules that are connected in parallel and that are connected to a power converter that cont…+3

›6.↳ 5A power storage system according to claim 5 wherein, the control unit:nstops the cell balance control when a required amount of power depending on a s…d2

›7.↳ 5A power storage system according to claim 5 wherein, when the cell balance control by the cell balancing circuit is started, the control unit controls…d2

›8.↳ 5A power storage system according to claim 5, further comprising:none voltage converter which is connected to the power converter; and a fourth on/off …d2

Classifications

2 codes

IPC · International Patent Classification

Section H — Electricity

H01M10/46

USPC · US Patent Classification

320/116

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Pendency

5.1 y

1,860 days filing → grant

Office actions

non-final + final

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no RCE

Examiner

Edward Tso

art unit 2859 · TC 2800

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Citations: 20 back · 0 forward

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20110127964 A1	2 Jun 2011

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