Abstract: Disclosed is a manufacturing method of a battery pack in which multiple battery cells are stacked, and electrodes of adjacent battery cells of the battery cells are connected by a bus bar, the bus bar having two holes that are smaller than the electrodes, and the bus bar being disposed such that the holes overlap the electrodes respectively. The manufacturing method includes welding the bus bar and one of the electrodes, then welding the bus bar and another one of the electrodes in an intermediate region between the two holes of the bus bar, and subsequently welding the bus bar and the other one of the electrodes in an end region adjacent to the intermediate region of the bus bar.

Abstract: A control unit includes: an input portion that receives the positional information of a vehicle; a calculation unit that generates a control signal for controlling an electromagnetic relay; and an output portion that outputs the control signal to the electromagnetic relay. The calculation unit determines whether a location region of the electromagnetic relay is a relay-freeze region, the location region being identified by the positional information of the vehicle, and, when the location region of the electromagnetic relay is a relay-freeze region, performs a freeze inhibiting process for preventing the electromagnetic relay from being frozen or defrosting the electromagnetic relay by opening and closing the electromagnetic relay and causing the electromagnetic relay to vibrate.

Abstract: A control unit includes: an input portion that receives the positional information of a vehicle; a calculation unit that generates a control signal for controlling an electromagnetic relay; and an output portion that outputs the control signal to the electromagnetic relay. The calculation unit determines whether a location region of the electromagnetic relay is a relay-freeze region, the location region being identified by the positional information of the vehicle, and, when the location region of the electromagnetic relay is a relay-freeze region, performs a freeze inhibiting process for preventing the electromagnetic relay from being frozen or defrosting the electromagnetic relay by opening and closing the electromagnetic relay and causing the electromagnetic relay to vibrate.

Abstract: A battery module is provided with a plurality of batteries (10) joined in a straight-line configuration, insulating caps (30) that insulate the series connected batteries (10), and connecting hardware (20, 40) disposed between connected batteries (10) that connect those batteries in series. The insulating cap (30) has an outer insulating region (31) that covers outer surfaces of adjacent batteries (10) connected in series. The connecting hardware (20, 40) has a first welding section (21, 41) that is welded to the end-plane electrode (19) of one battery, a second welding section (22, 42) that is disposed outside the first welding section and is welded to the end-plane electrode of another battery (10), and welding terminals (23, 43) that are disposed outside the outer insulating region (31) of the insulating cap (30) at battery outer surfaces in a manner insulated by the outer insulating region (31).

Abstract: A power device includes a battery module for fixing a connecting terminal to an end and a bus bar connected to the connecting terminal of the battery module. The connecting terminal includes a fixing plate portion fixed to the end of the cell, an outer cylindrical portion protruded cylindrically from the fixing plate portion, an end face plate portion closing a tip surface of the outer cylindrical portion, and an inner cylindrical portion protruded from the end face plate portion toward the fixing plate portion. The connecting terminal is provided with a female screw on an internal surface of the inner cylindrical portion and a setscrew penetrating through the bus bar is screwed toward the female screw, and the bus bar is fixed to the connecting terminal through the setscrew.

Abstract: The battery module is provided with a plurality of batteries 10 joined in a straight-line configuration, insulating caps 30 that insulate the series connected batteries 10, and connecting hardware 20, 40 disposed between connected batteries 10 that connect those batteries 10 in series. An insulating cap 30 has an outer insulating region 31 that covers outer surfaces of adjacent batteries 10 connected in series. Connecting hardware 20, 40 has a first welding section 21, 41 that is welded to the end-plane electrode 19 of one battery 10, a second welding section 22, 42 that is disposed outside the first welding section 21, 41 and is welded to the end-plane electrode 19 of another battery 10, and welding terminals 23, 43 that are disposed outside the outer insulating region 31 of the insulating cap 30 at battery 10 outer surfaces in a manner insulated by the outer insulating region 31.

Abstract: A power device includes a battery module for fixing a connecting terminal to an end and a bus bar connected to the connecting terminal of the battery module. The connecting terminal includes a fixing plate portion fixed to the end of the cell, an outer cylindrical portion protruded cylindrically from the fixing plate portion, an end face plate portion closing a tip surface of the outer cylindrical portion, and an inner cylindrical portion protruded from the end face plate portion toward the fixing plate portion. The connecting terminal is provided with a female screw on an internal surface of the inner cylindrical portion and a setscrew penetrating through the bus bar is screwed toward the female screw, and the bus bar is fixed to the connecting terminal through the setscrew.