Abstract: To provide a battery pack less subject to vibration, shock, or the like and stable in characteristics. A battery pack includes a unit battery obtained by accommodating, in a casing film, a battery element in which positive and negative electrodes are stacked via separators, the unit battery having a sealing portion obtained by sealing opposing synthetic resin layers formed on inner surface of the casing film; and a lithium ion secondary battery stacked body obtained by stacking a plurality of the unit batteries and winding a fixing tape therearound. A sealing surface of the sealing portion is substantially parallel to a unit battery stacking surface, and an end surface of the sealing portion is brought into contact with the fixing tape.

Abstract: Provided is a battery pack that is unlikely to be affected by vibration, shock, or the like, and has stable characteristics. A battery pack includes a battery module 300 that is made by stacking battery holding bodies 200 on which film-covered batteries are placed with positive- and negative-electrode pull-out tabs being taken out from the same side in such a way that sides from which the positive- and negative-electrode pull-out tabs are pulled out are aligned with each other, wherein: an extension tab connected each of the tabs is pulled out from a battery holding body in such a way as to extend in a direction perpendicular to a direction of the pull-out tab and in a direction opposite to the other pull-out tab; and the extension tabs are each bent along a side surface in a direction perpendicular to a battery stacking surface, and are stacked up and electrically connected.

Abstract: In order to provide a battery pack that can let a user accurately know the state of charge of the battery pack, a battery pack 100 of the present invention includes: a plurality of chip-type LEDs 71 to 75; a printed board 40 on which the plurality of chip-type LEDs 71 to 75 are placed; a second casing 20 where LED openings 21 to 25 are provided in such a way as to correspond to the plurality of chip-type LEDs 71 to 75; and moisture-proof resin 60 that is provided in such a way as to cover the plurality of chip-type LEDs 71 to 75 on the board, wherein height of the moisture-proof resin 60 between the plurality of chip-type LEDs 71 to 75 from a board surface of the printed board 40 is lower than height of the moisture-proof resin 60 on the plurality of chip-type LEDs 71 to 75 from the board surface of the printed board 40.

Abstract: Provided is a battery pack that is unlikely to be affected by vibration, shock, or the like, and has stable characteristics. A battery pack includes a battery module 300 that is made by stacking battery holding bodies 200 on which film-covered batteries are placed with positive- and negative-electrode pull-out tabs being taken out from the same side in such a way that sides from which the positive- and negative-electrode pull-out tabs are pulled out are aligned with each other, wherein: an extension tab connected each of the tabs is pulled out from a battery holding body in such a way as to extend in a direction perpendicular to a direction of the pull-out tab and in a direction opposite to the other pull-out tab; and the extension tabs are each bent along a side surface in a direction perpendicular to a battery stacking surface, and are stacked up and electrically connected.

Abstract: Provided is a battery pack that is unlikely to be affected by vibration, shock, or the like, and has stable characteristics. A battery pack is characterized in that: a battery module is made by stacking film-covered batteries with positive- and negative-electrode pull-out tabs being taken out from the same side; a plurality of battery modules are disposed in such a way that, in end surfaces of the battery modules, the sides of film-covered batteries from which positive- and negative-electrode pull-out tabs are pulled out face each other, and the battery modules are electrically connected together with an insulation member disposed between the modules; and side surfaces adjacent to the sides of film-covered batteries from which the positive- and negative-electrode pull-out tabs are pulled out are reinforced by a common reinforcing member.

Abstract: To provide a battery pack less subject to vibration, shock, or the like and stable in characteristics. A battery pack includes a unit battery obtained by accommodating, in a casing film, a battery element in which positive and negative electrodes are stacked via separators, the unit battery having a sealing portion obtained by sealing opposing synthetic resin layers formed on inner surface of the casing film; and a lithium ion secondary battery stacked body obtained by stacking a plurality of the unit batteries and winding a fixing tape therearound. A sealing surface of the sealing portion is substantially parallel to a unit battery stacking surface, and an end surface of the sealing portion is brought into contact with the fixing tape.