Electricity: battery or capacitor charging or discharging – Battery or cell charging – With thermal condition detection
Reexamination Certificate
2008-01-15
2009-06-23
Tso, Edward (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With thermal condition detection
Reexamination Certificate
active
07550950
ABSTRACT:
A battery pack includes a first switching element which shuts off a discharging current flowing to a battery cell and a second switching element which shuts off a charging current. A positive temperature coefficient thermistor is inserted between a gate control terminal of a protective control circuit and a gate of at least one of the switching elements, and a resistor is connected between the gate and a source of the switching element. The positive temperature coefficient thermistor is thermally connected to one or more of the first and second switching elements and/or to the battery cell. Thus, an abnormally overheated state of one or more of the switching elements or the battery cell leads to an increase in the resistance of the positive temperature coefficient thermistor causing shut-off of the switching element thereby protecting the battery pack.
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Office Action issued by the Chinese Patent Office on Dec. 7, 2007 in connection with the corresponding Chinese application No. 200580018425.4 with a Japanese translation and an English language translation.
Office Action issued by the Chinese Patent Office on Aug. 15, 2008 in connection with the corresponding Chinese application No. 200580018425.4 with a Japanese translation and an English language translation.
Chinese Office Action issued Aug. 15, 2008 in corresponding Chinese Application No. 200580018425.4, with Japanese translation and English-language translation of the cover page.
Ikeda Yutaka
Miyagawa Kazuto
Tsubaki Shuji
Murata Manufacturing Co. Ltd.
Ostrolenk Faber Gerb & Soffen, LLP
Tso Edward
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