Patent ID: 9077186
Filing Date: 2015-07-07
Classification: G01R,H01M,H02J,Y02E

Abstract:
1. A power supply device, comprising a plurality of power supply units connected in parallel, and includes a positive electrode-side junction formed by the joining of positive electrode-side terminals of the plurality of power supply units and a negative electrode-side junction formed by the joining of negative electrode-side terminals of the plurality of power supply units, wherein each of the plurality of power supply units includes a battery unit, and a first relay that is provided between one of the positive and negative electrode-side junctions and the battery unit and is electrically disconnectably connected in series to the battery unit, each of the plurality of power supply units includes a resistive element of which one end is connected between the first relay, which is connected to one of a positive electrode terminal and a negative electrode terminal of the battery unit, and the battery unit, and the other end of the first resistive element is connected to one of the positive and negative electrode-side junctions, each of the plurality of power supply units other than the plurality of power supply units connected to the first resistive element includes a second resistive element of which one end is connected between the first relay, which is connected to one of the positive electrode terminal and the negative electrode terminal of the battery unit, and the battery unit, the other end of the second resistive element is connected to one end of the first resistive element via a connection part, and second relays that cut off current flowing to one of the positive and negative electrode-side junctions connected to the first relays of the plurality of power supply units from the plurality of power supply units through the other resistive elements and allow the flow of the current.