Protection circuit for battery pack, battery pack including the protection circuit, and method of operating the battery pack
First Claim
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1. A protection circuit of a battery pack, comprising:
- a charge/discharge element unit positioned in a high current path of the battery pack;
a temperature sensor positioned at one side in the battery pack, for sensing a temperature of a battery; and
a primary protection circuit connected to the temperature sensor and the charge/discharge element unit, for controlling the charge/discharge element unit based on whether the temperature sensed by the temperature sensor is within the range of a reference operation temperature.
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Abstract
A protection circuit controls charging/discharging of a battery pack in both a high temperature region and a low temperature region. The battery pack is protected from the risk of firing, burning or explosion which occurs in a high temperature region, to secure its safety. Furthermore, the charging and discharging of the battery pack is controlled in a low temperature region, to prevent incomplete charging and to increase the battery capacity efficiency.
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Citations
18 Claims
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1. A protection circuit of a battery pack, comprising:
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a charge/discharge element unit positioned in a high current path of the battery pack; a temperature sensor positioned at one side in the battery pack, for sensing a temperature of a battery; and a primary protection circuit connected to the temperature sensor and the charge/discharge element unit, for controlling the charge/discharge element unit based on whether the temperature sensed by the temperature sensor is within the range of a reference operation temperature. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A battery pack comprising:
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a battery including one or more bare cells; a protection circuit electrically connected to the battery and including a charge/discharge element, a temperature sensor and a primary protection circuit for controlling the charge/discharge element based on whether a temperature of the battery sensed by the temperature sensor is within the range of a reference operating temperature; and an external terminal for electrically connecting the battery to an external power source or a load. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of operating a battery pack, the method comprising:
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sensing a temperature of a battery; determining whether a battery pack is charged or discharged; comparing the sensed temperature to a predetermined charge reference operation temperature, and determining whether the sensed temperature is within the range of the reference operation temperature upon the battery pack being charged, and comparing the sensed temperature to a predetermined discharge reference operation temperature, and determining whether the sensed temperature is within the range of the reference operation temperature upon the battery pack being discharged; outputting a normal operation signal upon the sensed temperature being within the charge reference operation temperature and outputting an abnormal operation signal upon the sensed temperature not being within the charge reference operation temperature upon the battery pack being charged, and outputting a normal operation signal upon the sensed temperature being within the discharge reference operation temperature and outputting an abnormal operation signal upon the sensed temperature not being within the discharge reference operation temperature upon the battery pack being discharged; and turning on a charge element based on the normal operation signal or turning off the charge element based on the abnormal operation signal during charging, and turning on a discharge element based on the normal operation signal or turning off the discharge element based on the abnormal operation signal during discharging. - View Dependent Claims (18)
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Specification