DT/Dt detector for cell pack charge determination

Details DT/Dt detector for cell pack charge determination DT/Dt detector for cell pack charge determination

1993-11-12

1995-04-04

Gutierrez, Diego F. F.

Thermal measuring and testing

Thermal testing of a nonthermal quantity

364481, 324427, 320 48, 374102, 340636, G01N 2500, G08B 2100, G01R 3136

Patent

active

054030935

ABSTRACT:
A technique for detecting when a full charge for a cell pack is reached based upon sensing an actual temperature of the cell pack. The initial actual temperature is the first value stored as a reference temperature. During subsequent sampling events, the actual temperature is stored as the reference temperature when the actual temperature exceeds said reference temperature. A first value for each sample event is stored in a rollover memory when said actual temperature exceeds the reference temperature, and a second value is stored in the rollover memory when the actual temperature does not exceed the reference temperature. The occurrences of the first values is summed for a series of consecutive sampling events to derive a total. The total is compared to a predetermined limit, and if the total is greater, then charging of the cell pack will be discontinued.

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