| 摘要 |
PURPOSE:To provide a battery-connected circuit having a simple and reliable mechanism by which the circuit can be used continuously without being put in a circuit-open condition even if fuses connected to the circuit are fused. CONSTITUTION:In a circuit where cells 1a and 1b are connected in series to each other and serial circuits such as connecting a fuse 2a in series to this are connected in plurality in parallel to each other, a circuit 6 is constituted by connecting an element 5, in which a diode 3 and a fuse 4 are connected in parallel to the serial circuits, in parallel to these circuits. When the serial circuits are released due to melting of the fuse 2a by such a reason that the cell 1a is broken down and an excessive electric current is flowed, a quantity equivalent to the electric current is flowed distributively to the other serial circuits, so that the other fuses 2b-2d are melted. An electric current exceeding a threshold value is further flowed to the element 5, and the fuse 4 is melted, so that the element 5 is switched into a short circuit condition. Thereby, the element 5 is continued electrically, and the circuit 6 is connected, so that charging becomes possible. |
