Electricity: battery or capacitor charging or discharging – Battery or cell charging – With thermal condition detection
Reexamination Certificate
2006-07-24
2010-10-05
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With thermal condition detection
C320S150000, C320S151000, C320S134000, C320S154000
Reexamination Certificate
active
07808212
ABSTRACT:
A protection circuit for a battery pack, comprising: a thermistor for indicating a temperature of a cell in the battery pack; a first comparator coupled to the thermistor for determining whether the temperature has exceeded a charge cut-off temperature threshold for the cell, and if so, for turning off a first switch in series with the cell to prevent: charging of the cell; and, a second comparator coupled to the thermistor for determining whether the temperature has exceeded a discharge cut-off temperature threshold for the cell, and if so, for turning off a second switch in series with the cell to prevent discharging of the cell.
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Idzik Jacek S.
Litingtun Siong
Boateng Alexis
Conneely Joseph
McCarthy Tétrault LLP
Research In Motion Limited
Tso Edward
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