DEVICE AND METHOD FOR STABILIZING VOLTAGE OF ENERGY STORAGE
First Claim
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1. A device for stabilizing a voltage of an energy storage formed by connecting a plurality of unit cells in series comprising:
- a bypass unit connected to the unit cell in parallel; and
a control unit connected to the unit cell in parallel to monitor a voltage of the unit cell and connected to the bypass unit to control on/off of the bypass unit, wherein the control unit controls the on/off of the bypass unit in two modes by determining whether the unit cell is being charged or discharged and applying two differently set reference voltages.
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Abstract
The present invention provides a device and a method for stabilizing a voltage of an energy storage capable of performing voltage stabilization in different ways by setting different references when charging or discharging and when standing by. Therefore, system resources consumed for the voltage stabilization of the energy storage can be minimized.
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12 Claims
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1. A device for stabilizing a voltage of an energy storage formed by connecting a plurality of unit cells in series comprising:
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a bypass unit connected to the unit cell in parallel; and a control unit connected to the unit cell in parallel to monitor a voltage of the unit cell and connected to the bypass unit to control on/off of the bypass unit, wherein the control unit controls the on/off of the bypass unit in two modes by determining whether the unit cell is being charged or discharged and applying two differently set reference voltages. - View Dependent Claims (2, 3, 4, 5)
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6. A method for stabilizing a voltage of an energy storage formed by connecting a plurality of unit cells in series comprising:
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a) monitoring a voltage of the unit cell; b) determining whether the unit cell is being charged or discharged by using the monitored value; and c) stabilizing the voltage of the unit cell by applying two differently set reference voltages according to a result of determination in the step b). - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification