Abstract: Bus bars are soldered to a wiring pattern of a printed board to which the bus bars are connected, and the bus bars are screwed to the printed board. Tips of bolts passing through holes in the bus bars and holes in the punted board may be tightened using nuts. The holes in the printed board may be electrically connected to the wiring pattern.

Abstract: A management device manages a second power storage device that reinforces a first power storage device for supplying electricity to loads in the vehicle. A power supply unit of the management device steps down a voltage supplied from the first power storage device. A control unit uses, as a power supply voltage, the voltage generated by the power supply unit and monitors the state of the second power storage device to control the charging and discharging of the second power storage device. A switch electrically connects or disconnects the second power storage device to or from the power supply unit. The switch is turned on when an ignition is in an on-state, and is turned off when the ignition is in an off-state.

Abstract: In a control device that drives a semiconductor switch element, a first control switch is connected between a signal line and a source terminal or an emitter terminal of a semiconductor switch element. The signal line supplies a driving signal to a gate terminal or a base terminal of semiconductor switch element. The first control switch is controlled to an ON state when the semiconductor switch element is controlled to an OFF state. A second control switch is connected between the signal line and the source terminal or the emitter terminal in parallel with the first control switch. The second control switch is turned on when a potential of the source terminal or the emitter terminal becomes a negative potential.

Abstract: In a control device that drives a semiconductor switch element, a first control switch is connected between a signal line and a source terminal or an emitter terminal of a semiconductor switch element. The signal line supplies a driving signal to a gate terminal or a base terminal of semiconductor switch element. The first control switch is controlled to an ON state when the semiconductor switch element is controlled to an OFF state. A second control switch is connected between the signal line and the source terminal or the emitter terminal in parallel with the first control switch. The second control switch is turned on when a potential of the source terminal or the emitter terminal becomes a negative potential.

Abstract: A management device manages a second power storage device that reinforces a first power storage device for supplying electricity to loads in the vehicle. A power supply unit of the management device steps down a voltage supplied from the first power storage device. A control unit uses, as a power supply voltage, the voltage generated by the power supply unit and monitors the state of the second power storage device to control the charging and discharging of the second power storage device. A switch electrically connects or disconnects the second power storage device to or from the power supply unit. The switch is turned on when an ignition is in an on-state, and is turned off when the ignition is in an off-state.

Abstract: Bus bars are soldered to a wiring pattern of a printed board to which the bus bars are connected, and the bus bars ate screwed to the printed board. Tips of bolts passing through holes in the bus bars and holes in the punted board may be tightened using nuts. The holes in the printed board may be electrically connected to the wiring pattern.