Voltage measuring circuit of battery pack

Details Voltage measuring circuit of battery pack Voltage measuring circuit of battery pack

2005-07-19

2005-07-19

Tibbits, Pia (Department: 2838)

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

Reexamination Certificate

active

06919706

ABSTRACT:
A voltage detecting circuit for a cell combination including one or more cell blocks having a plurality of cell modules connected to each other in series, including voltage detecting lines extending, respectively, from a plurality of voltage detecting points of the cell combination, of the lines is connected to the ground, and nongrounding voltage detecting lines are each interconnected through voltage branch lines to the grounding voltage detecting line. A voltage dividing resistor is interposed on each of the nongrounding voltage detecting lines and each of the voltage branch lines. Each of the nongrounding voltage detecting line is connected to a computing circuit via an analogue-digital converter. The computing circuit calculates voltage of each of cell modules based on voltage detecting data input from each of the nongrounding voltage detecting lines. Accordingly, the number of parts is reduced, voltage detecting accuracy is improved, and disconnection is reliably detected.

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