Patent ID: 8314589
Filing Date: 2012-11-20
Classification: H02J

Abstract:
1. A battery pack, comprising: at least one rechargeable battery; a positive charging and discharging terminal electrically connected to a positive electrode of the battery; a negative charging and discharging terminal electrically connected to a negative electrode of the battery; a charging and discharging switching element electrically connected in a high current path either between the positive charging and discharging terminal and the battery or between the negative charging and discharging terminal and the battery, and a charging and discharging current flowing through the charging and discharging switching element; a protection circuit part comprising positive and negative power terminals electrically connected to positive and negative electrodes of the battery, respectively, to receive power, and being electrically connected to the charging and discharging switching element to either turn on or turn off the charging and discharging switching element in accordance with a charging and discharging state of the battery; a switching unit electrically connected in one of a first current path between the positive power terminal of the protection circuit part and the positive electrode of the battery, and a second current path between the negative power terminal of the protection circuit part and the negative electrode of the battery, and an electrical current flowing from the battery to the protection circuit part through the switching unit; and an auxiliary terminal electrically connected between the switching unit and at least one of a charger and a load during charging or discharging.