Patent ID: 9112360
Filing Date: 2015-08-18
Classification: H02J

Abstract:
1. A power supply device that supplies electric power from a plurality of batteries to an electrical apparatus, the power supply device comprising: a plurality of battery interfaces configured to removably receive at least three batteries including a first battery, a second battery and a third battery, wherein each of the first, second and third batteries includes a positive electrode terminal and a negative electrode terminal; a connection circuit configured to electrically connect the at least three batteries to each other, wherein the connection circuit is capable of connecting at least two batteries in parallel and connecting at least one other battery to the at least two parallel-connected batteries in series and includes: a pair of output terminals configured to output electric power from the at least three batteries while the connection circuit electrically connects the at least one other battery to the at least two parallel-connected batteries, wherein the connection circuit is capable of switching connection state of the at least three batteries among: