OVERCHARGE PROTECTION CIRCUIT AND METHOD OF CONTROLLING THE SAME
First Claim
1. An overcharge protection circuit comprising:
- a battery;
a battery management system (BMS) having an overcharge sensing unit for detecting cell voltage of the battery, comparing the cell voltage with a preset overcharge voltage, and then generating either a signal indicative of normal connection of the battery or an overcharge signal depending on a result of the comparison and a switch control unit for generating a control signal depending on a result of comparing a hold-up time of the overcharge signal with a preset hold-up time of the overcharge signal; and
a switch for connecting or blocking a power source for supplying charging power to the battery in response to the control signal.
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Accused Products
Abstract
An overcharge protection circuit may include a battery, a battery management system (BMS) having an overcharge sensing unit for detecting cell voltage of the battery, comparing the cell voltage with a preset overcharge voltage, and then generating either a signal indicative of normal connection of the battery or an overcharge signal depending on a result of the comparison and a switch control unit for generating a control signal depending on a result of comparing a hold-up time of the overcharge signal with a preset hold-up time of the overcharge signal, and a switch for connecting or blocking a power source for supplying charging power to the battery in response to the control signal.
3 Citations
18 Claims
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1. An overcharge protection circuit comprising:
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a battery; a battery management system (BMS) having an overcharge sensing unit for detecting cell voltage of the battery, comparing the cell voltage with a preset overcharge voltage, and then generating either a signal indicative of normal connection of the battery or an overcharge signal depending on a result of the comparison and a switch control unit for generating a control signal depending on a result of comparing a hold-up time of the overcharge signal with a preset hold-up time of the overcharge signal; and a switch for connecting or blocking a power source for supplying charging power to the battery in response to the control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling an overcharge protection circuit, comprising:
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a cell voltage sensing step in which an overcharge sensing unit of a battery management system (BMS) detects cell voltage of a battery; a voltage comparison step in which the overcharge sensing unit of the BMS compares the cell voltage with a preset overcharge voltage; an overcharge signal generating step in which the overcharge sensing unit of the BMS generates either a signal indicative of normal connection of the battery or an overcharge signal of the battery depending on a result of the comparison; a control signal generating step in which a switch control unit of the BMS generates a control signal depending on a result of comparing a hold-up time of the overcharge signal with a preset hold-up time of the overcharge signal; and a connecting/blocking step in which a switch connects or blocks a power source for supplying charging power to the battery in response to the control signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification