ELECTRIC ENERGY STORAGE DEVICE
First Claim
1. An electric energy storage device charged with an input current having a current value repeatedly exhibiting peaks and valleys, comprising:
- an electric double-layer capacitor unit including at least one electric double-layer capacitor; and
a battery unit including at least one secondary battery, the battery unit being connected in parallel to the electric double-layer capacitor unit,wherein a ratio of an internal resistance of the electric double-layer capacitor unit to an internal resistance of the battery unit is determined according to parameters relating to the input current.
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Accused Products
Abstract
Provided is an electric energy storage device capable of improving a charging efficiency when electric power supplied with an input current having a current value repeatedly exhibiting peaks and valleys is to be storaged by using a secondary battery and an electric double-layer capacitor. The electric energy storage device includes: an electric double-layer capacitor; and a battery unit including at least one secondary battery, the battery unit being connected in parallel to the electric double-layer capacitor, in which: a ratio of an internal resistance of the electric double-layer capacitor to an internal resistance of the battery unit is determined according to parameters relating to the input current.
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Citations
15 Claims
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1. An electric energy storage device charged with an input current having a current value repeatedly exhibiting peaks and valleys, comprising:
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an electric double-layer capacitor unit including at least one electric double-layer capacitor; and a battery unit including at least one secondary battery, the battery unit being connected in parallel to the electric double-layer capacitor unit, wherein a ratio of an internal resistance of the electric double-layer capacitor unit to an internal resistance of the battery unit is determined according to parameters relating to the input current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13, 14, 15)
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8. An electric energy storage device charged with an input current having a current value repeatedly exhibiting peaks and valleys, comprising:
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an electric double-layer capacitor unit including at least one electric double-layer capacitor; and a battery unit including at least one secondary battery, the battery unit being connected in parallel to the electric double-layer capacitor unit, wherein a value of a product of a ratio of an internal resistance of the electric double-layer capacitor unit to an internal resistance of the battery unit and a ratio of a chargeable electric energy of the electric double-layer capacitor unit to a chargeable electric energy of the battery unit is equal to or larger than 0.018 and equal to or smaller than 0.036. - View Dependent Claims (9)
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10. An electric energy storage device, comprising:
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a plurality of electric double-layer capacitors connected in series to each other; and a plurality of battery units respectively connected in parallel to the plurality of electric double-layer capacitors, each of the plurality of battery units including at least one sealed secondary battery for reducing oxygen, generated at a positive electrode, at a negative electrode when the at least one sealed secondary battery is overcharged, wherein a rated voltage of each of the plurality of electric double-layer capacitors is equal to or higher than a voltage obtained when a corresponding one of the plurality of battery units, which is connected in parallel to the each electric double-layer capacitor, is overcharged. - View Dependent Claims (11, 12)
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Specification