05652501 is referenced by 174 patents and cites 128 patents.

A battery charger/monitor circuit for charging and/or monitoring a plurality of series-connected cells, including a voltage sensor for sensing the voltage across each of the cells to provide a high cell voltage signal proportional to the highest voltage across any of the cells and a low cell voltage signal proportional to the lowest voltage across any of the cells. The circuit is operable in a monitor mode or a charge mode. In the monitor mode, the cells are disconnected from a load if the low cell voltage signal decreases to a first predetermined level. The circuit includes a controller which provides a control signal in response to the high cell voltage signal, the low cell voltage signal and a current sense signal, for controlling the charging of the cells. In the charge mode, the cells receive a constant charge current until the high cell voltage signal reaches a second predetermined level, after which the voltage across the cell charged to the highest voltage is held substantially constant, causing the charge current to be reduced.

Title
Voltage sensor for detecting cell voltages
Application Number
8/353620
Publication Number
5652501
Application Date
December 12, 1994
Publication Date
July 29, 1997
Inventor
Robert A Mammano
Costa Mesa
CA, US
John A O Connor
Merrimack
NH, US
Winthrop H McClure
Londonderry
NH, US
Agent
Weingarten Schurgin Gagnebin & Hayes
Assignee
Unitrode Corporation
MA, US
IPC
H01M 10/42
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