Energy storage device, image forming apparatus including energy storage device, and discharge control method
AssigneeRicoh Company, Ltd.
InventorKazuhito Kishi
Life of this patent
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Abstract
An energy storage device that includes capacitor cells of a first type having a first internal resistance and capacitor cells of a second type having a second internal resistance which is higher than the first internal resistance. Further, there is a detection unit that detects a voltage value between two opposing ends of at least one of the capacitor cells, or a voltage detection switching unit that integrates a switch arranged between two opposing ends of at least one of the capacitor cells.
Claims9
An energy storage device that is used in an apparatus, the energy storage device comprising:
- a plurality of capacitor cells of a first type having a first internal resistance;
- a plurality of capacitor cells of a second type having a second internal resistance which is higher than the first internal resistance;
- a detection unit that detects a voltage value between two opposing ends of at least one of the capacitor cells of the first type or at least one of the capacitor cells of the second type;
- and
- a control unit that controls discharge operations of said at least one of the capacitor cells of the first type or said at least one of the capacitor cells of the second type when the voltage value detected by the detection unit is greater than a predetermined threshold value,
- wherein:
- the capacitor cells of the first type are serially connected to form a first capacitor module,
- the capacitor cells of the second type are serially connected to form a second capacitor module, and
- the first capacitor module and the second capacitor module are connected in parallel.
An energy storage device that is used in an apparatus, the energy storage device comprising:
- a plurality of capacitor cells of a first type having a first internal resistance;
- a plurality of capacitor cells of a second type having a second internal resistance which is higher than the first internal resistance;
- and
- a voltage detection switching unit that integrates a switch arranged between two opposing ends of at least one of the capacitor cells of the first type or at least one of the capacitor cells of the second type, and a detection unit that detects a voltage value between the two opposing ends of said at least one of the capacitor cells of the first type or said at least one of the capacitor cells of the second type,
- wherein:
- the voltage detection switching unit is configured to turn on/off the switch according to the voltage value detected by the detection unit and control charge operations of said at least one of the capacitor cells of the first type or said at least one of the capacitor cells of the second type,
- the capacitor cells of the first type are serially connected to form a first capacitor module,
- the capacitor cells of the second type are serially connected to form a second capacitor module, and
- the first capacitor module and the second capacitor module are connected in parallel.
Dependencies are inferred from the claim text.