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US 9,178,367 B2Granted
Balance correction apparatus and electric storage system
AssigneeEVTD Inc.
InventorFumiaki Nakao
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AssigneeEVTD Inc.
InventorFumiaki Nakao
Estimating the term…
Excess voltage is prevented from flowing through an electric storage cell. Included are an inductor, a first switching device, a second switching device and a control section supplying a control signal to control ON/OFF operations of the first switching device and the second switching device, to the first switching device and the second switching device, where the control section supplies the control signal so that the first switching device and the second switching device repeat ON/OFF operations alternately when a voltage of the first electric storage cell and a voltage of the second electric storage cell are lower than a predetermined value, and the control section supplies a control signal to stop the balance correction apparatus, when at least one of the voltage of the first electric storage cell and the voltage of the second electric storage cell is equal to the predetermined value or larger than the predetermined value.
A balance correction apparatus that equalizes voltages of a first electric storage cell and a second electric storage cell connected in series, comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: methods for charging or discharging
Acting upon multiple batteries simultaneously or sequentially: for charge balancing, e.g. equalisation of charge between batteries
For charge balancing, e.g. equalisation of charge between batteries: passive balancing, e.g. using resistors or parallel MOSFETs
For charge balancing, e.g. equalisation of charge between batteries: active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters
About 6 years 3 months of term left · ends 6 Feb 2033 (estimated)
The contents of the following Japanese patent application and PCT patent application are incorporated herein by reference: NO. 2012-062647 filed on Mar. 19, 2012, and NO. PCT/JP2013/000653 filed on Feb. 6, 2013.
1. Technical Field
The present invention relates to a balance correction apparatus and an electric storage system.
FIG. 1 schematically shows an example of an apparatus 100 including an electric storage system 110.
FIG. 2 schematically shows an example of an electric storage system 210.
FIG. 3 schematically shows an example of an operation of the electric storage system 210.
Hereinafter, some embodiments of the present invention will be described. The embodiments do not limit the invention according to the claims, and all the combinations of the features described in the embodiments are not necessarily essential to means provided by aspects of the invention. In addition, the embodiments are described with reference to the drawings. In the drawings, the same or similar portions are assigned the same reference numeral, and overlapping explanation may be occasionally omitted.
FIG. 1 schematically shows an example of an apparatus 100 including an electric storage system 110. With reference to FIG. 1, the configuration and operation of the apparatus 100 and the electric storage system 110 are explained. In the present embodiment, the apparatus 100 includes a motor 102 and an electric storage system 110. The apparatus 100 may be a transport apparatus such as an electric automobile, a hybrid automobile, an electric two wheeled vehicle, a rail vehicle, and an elevator. The apparatus 100 may be an electric appliance such as a personal computer and a portable telephone. The motor 102 is electrically connected to the electric storage system 110, and uses power supplied by the electric storage system 110. The motor 102 may be used as a regenerative brake. The motor 102 may be an example of an electric load.
The electric storage system 110 is electrically connected to the motor 102, to supply power to the motor 102 (occasionally referred to as “discharge of the electric storage system”). The electric storage system 110 is electrically connected to a charge apparatus not illustrated in the drawings, to store electric energy (occasionally referred to as “charge of the electric storage system”).