04114083 is referenced by 144 patents and cites 10 patents.

A device for determining a thermal runaway condition in a nickel-cadmium tery. A current sensor develops a DC voltage proportional to battery current and a converter converts the voltage to a pulse train whose frequency is directly proportional to battery current. The pulse train frequency is monitored for fixed periods of time and changes of frequencies are used to determine the slope of the charge current. A maximum allowable slope is specified and fed into a binary up/down counter which also counts the pulse train frequency. When the difference between two pulse train frequency readings is greater than the maximum allowable, a possible thermal runaway condition is indicated and after a predetermined number of consecutive indications, an indicator is energized to provide a warning.

Title
Battery thermal runaway monitor
Application Number
5/806799
Publication Number
4114083
Application Date
June 15, 1977
Publication Date
September 12, 1978
Inventor
Ronald J Stovall
Bedford
IN, US
Hubert L Huffman
Bedford
IN, US
Steven D Clark
Crane
IN, US
Harold L Benham
Bedford
IN, US
Agent
Paul S Collignon
R S Sciascia
Assignee
The United States of America represented by the Secretary of the Navy
DC, US
IPC
H02H 3/08
H02J 7/00
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