ELECTRICAL STORAGE SYSTEM, AND CONTROL METHOD FOR ELECTRICAL STORAGE SYSTEM
First Claim
1. An electrical storage system comprising:
- a plurality of electrical storage devices each including a plurality of electrical storage elements and bypass circuits each connected in parallel with a corresponding one of the electrical storage elements, the plurality of the electrical storage devices being connected in parallel with each other, and the plurality of the electrical storage elements being serially connected;
a plurality of relays each provided in correspondence with a corresponding one of the plurality of electrical storage devices, each of the plurality of the relays being configured to switch between a state where the corresponding one of the electrical storage devices is connected to a current path for charging or discharging and a state where the corresponding one of the electrical storage devices is isolated from the current path; and
a controller configured to control a charge or discharge of the plurality of electrical storage devices,the controller being configured to isolate the completely discharged electrical storage element from the current path with the use of a corresponding one of the bypass circuits and isolate the completely discharged electrical storage device from the current path with the use of a corresponding one of the relays, when the plurality of electrical storage devices are discharged,the controller being configured to isolate the completely charged electrical storage element from the current path with the use of a corresponding one of the bypass circuits and isolate the completely charged electrical storage device from the current path with the use of a corresponding one of the relays, when the plurality of electrical storage devices are charged, andthe controller being configured to calculate a full charge capacity of each of the electrical storage elements and a full charge capacity of each of the electrical storage devices by accumulating a current value flowing through each of the electrical storage elements and each of the electrical storage devices until the corresponding electrical storage element or the corresponding electrical storage device is isolated from the current path, when the plurality of electrical storage devices are charged after being discharged.
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Accused Products
Abstract
An electrical storage system including electrical storage devices, relays and a controller, and a control method therefor are provided. When the electrical storage devices are discharged, the controller isolates the completely discharged electrical storage element from a current path with a corresponding bypass circuit, and isolates the completely discharged electrical storage device from the current path with the corresponding relay. When the electrical storage devices are charged, the completely charged electrical storage element is isolated from the current path with the corresponding bypass circuit, and the completely charged electrical storage device is isolated from the current path with the corresponding relay. When the electrical storage devices are charged after being discharged, the full charge capacities of each electrical storage element and each electrical storage device are calculated by accumulating a current value until being isolated from the current path.
36 Citations
12 Claims
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1. An electrical storage system comprising:
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a plurality of electrical storage devices each including a plurality of electrical storage elements and bypass circuits each connected in parallel with a corresponding one of the electrical storage elements, the plurality of the electrical storage devices being connected in parallel with each other, and the plurality of the electrical storage elements being serially connected; a plurality of relays each provided in correspondence with a corresponding one of the plurality of electrical storage devices, each of the plurality of the relays being configured to switch between a state where the corresponding one of the electrical storage devices is connected to a current path for charging or discharging and a state where the corresponding one of the electrical storage devices is isolated from the current path; and a controller configured to control a charge or discharge of the plurality of electrical storage devices, the controller being configured to isolate the completely discharged electrical storage element from the current path with the use of a corresponding one of the bypass circuits and isolate the completely discharged electrical storage device from the current path with the use of a corresponding one of the relays, when the plurality of electrical storage devices are discharged, the controller being configured to isolate the completely charged electrical storage element from the current path with the use of a corresponding one of the bypass circuits and isolate the completely charged electrical storage device from the current path with the use of a corresponding one of the relays, when the plurality of electrical storage devices are charged, and the controller being configured to calculate a full charge capacity of each of the electrical storage elements and a full charge capacity of each of the electrical storage devices by accumulating a current value flowing through each of the electrical storage elements and each of the electrical storage devices until the corresponding electrical storage element or the corresponding electrical storage device is isolated from the current path, when the plurality of electrical storage devices are charged after being discharged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A control method of controlling a charge or discharge of a plurality of electrical storage devices, each including a plurality of electrical storage elements and bypass circuits each connected, in parallel with a corresponding one of the electrical storage elements, the plurality of the electrical storage devices being connected in parallel with each other, and the plurality of the electrical storage elements being serially connected, the control method comprising:
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isolating the completely discharged electrical storage element from the current path with the use of a corresponding one of the bypass circuits and isolating the completely discharged electrical storage device from the current path with the use of a corresponding one of the relays each provided in correspondence with a corresponding one of the electrical storage devices, when the plurality of electrical storage devices are discharged, isolating the completely charged electrical storage element from the current path with the use of a corresponding one of the bypass circuits and isolating the completely charged electrical storage device from the current path with the use of a corresponding one of the relays, when the plurality of electrical storage devices are charged, and calculating a full charge capacity of each of the electrical storage elements and a full charge capacity of each of the electrical storage devices by accumulating a current value flowing through each of the electrical storage elements and each of the electrical storage devices until the corresponding electrical storage element or the corresponding electrical storage device is isolated from the current path, when the plurality of electrical storage devices are charged after being discharged.
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Specification