Battery pack compensating a cell voltage, a charge and discharge current and temperature data, by using a built-in CPU for the battery pack
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United States of America Patent
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Aug 19, 2003
Grant Date -
Mar 28, 2002
app pub date -
Sep 21, 2001
filing date -
Sep 25, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A battery pack containing a CPU and allowing correction of measured data is provided. The CPU has, at least, a main program for obtaining data concerning the voltage of each cell, charge/discharge current and temperature by measurement to control charging and discharging and to perform cumulative calculation of the remaining battery capacity, a communication program for communicating with an external device, and a correction program for acquiring measured data to obtain a correction factor for calculating a predetermined value from each item of the measured data and for storing the correction factor in a memory. After the state of each cell has been set to a predetermined value, the correction program is started to obtain a correction factor and to store it in the memory. The main program corrects each item of measured data concerning the cell voltage, charge/discharge current and temperature by the correction factor to control charging and discharging and to perform cumulative calculation of the remaining battery capacity. Thus, it is possible to increase the measurement accuracy even if low-cost members are used, and hence possible to reduce the costs.
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