Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2005-08-16
2005-08-16
Tso, Edward H. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
Reexamination Certificate
active
06930467
ABSTRACT:
The invention provides a multi-series connection type battery cell pack, characterized by comprising a plurality of series-connected battery cells1, a charge/discharge control switch2for performing charge/discharge control, a plurality of protective circuits3-1and3-2for dividing the plurality of battery cells1into a plurality of blocks to detect at least the voltage of each battery cell, a computing circuit5for performing computation of pack detection signals and a level conversion circuit4for unifying voltages references of the detection signals between the plurality of protective circuits3-1and3-2and the computing circuit5, wherein the plurality of protective circuits3-1and3-2are joined in parallel with the battery cells1in a multistage fashion. It is thus possible to unify the voltage references while computation and communication are executed irrespective of control. It is then possible to manage the battery cell pack in a unified manner using a microcomputer or the like and, hence, to determine management specific to batteries and operational criteria specific to battery products at users' disposal. It is also possible to make a switching between a mode wherein current consumption in the pack minimizes and a normal operation mode and, hence, switch the pack over to the minimum current consumption mode when it is not in use, thereby reducing the failure rate during long-term storage.
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Communication dated Jan. 14, 2004 with European Search Report.
NEC Tokin Tochigi, Ltd.
Tso Edward H.
Westerman Hattori Daniels & Adrian LLP
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