Patent ID: 6326767
Filing Date: 2001-12-04
Classification: H01M,H02J,Y02E

Abstract:
A rechargeable battery pack to provide electrical capacity to portable electrical devices and to couple to a battery charger to receive a charging current, the rechargeable battery pack comprising:a plurality of batteries coupled in series to generate the electrical capacity of the rechargeable battery pack and to receive the charging current from the battery charger, the plurality of batteries havinga first battery with a negative terminal having a negative pole anda last battery with a positive terminal having a positive pole,the negative terminal and the positive terminal to couple to the battery charger to receive the charging current andthe negative pole to couple to the battery charger to sense a battery temperature; anda battery pack housing to protect and hold together the plurality of batteries coupled in series, the battery pack housing havinga polarity protection slot to prevent reverse polarity charging,a first battery terminal opening to provide access to the positive pole of the positive terminal of the last battery to couple to a positive charging terminal of the battery charger, anda second battery terminal opening to provide access to the negative pole of the negative terminal of the first battery to couple to a negative charging terminal of the battery charger having a temperature sensor to sense the battery temperature at the negative pole of the negative terminal of the first battery.