Patent ID: 9099867
Filing Date: 2015-08-04
Classification: H01F,H02J

Abstract:
1. A battery pack charging system comprising: a battery pack; and a charger comprising: a first magnet and a second magnet having an opposite magnetic pole from that of the first magnet; a coil configured to induce a current in the battery pack when the battery pack is aligned within the charger; a detection unit configured to detect amperage data of the induced current in the battery pack and configured to compare the amperage data of the induced current to a reference current value; wherein the battery pack includes a plurality of third magnets and a plurality of fourth magnets, the arrangement of the plurality of third magnets and the plurality of fourth magnets corresponding to an arrangement of the first and second magnets of the charger, wherein the arrangement of the plurality of third magnets and the plurality of fourth magnets with regard to the first and second magnets identifies the battery based on the coupling effect between the plurality of third magnets and the plurality of fourth magnets and the first and second magnets; wherein, when the battery pack is coupled to the charger, the first magnet faces the fourth magnet, the second magnet faces the third magnet, and a current is induced in the battery pack which is detectable by the detection unit, the induced current being indicative of proper alignment of the battery pack in the battery charger when the amperage data of the induced current corresponds to the reference current value.