Sanyo Electric Co., Ltd.

Makita Corporation

Masami Haino

Koichi Muramatsu

Haruhiko Yoneda

Kouji Fukushima

Hironori Ogura

Yuji Kishida

Toru Yamada

Takeaki Wakabayashi

Masato Koutari

Terumasa Kinugawa

A battery pack includes: a connector holder that is fixed to an exterior case and has two main surfaces that include a first main surface exposed through an opening of the exterior case; a floating connector connected with a center of the connector holder in such a manner that the floating connector floats in such a manner that an orientation or a position of the floating connector is variable upward, downward, leftward, and rightward; a lead wire fixed to an inner surface of the floating connector, the lead wire extending through an inside of the exterior case, and the lead wire connecting floating connector with a circuit board; and a positioning buffer that pushes the floating connector, and positions the floating connector at a predetermined original state when an external force is not applied to the floating connector.

Battery pack and production method for same

A battery pack includes: a connector holder that is fixed to an exterior case and has a second main surface that faces an inside of the exterior case; a floating connector connected with a center of the connector holder in such a manner that the floating connector floats such that an orientation of the floating connector is variable upward, downward, leftward, and rightward; and a lead wire fixed to an inner surface of the floating connector. The lead wire extends through an inside of the exterior case. The Lead wire) connects the floating connector with a circuit board. The connector holder has a guide pipe on a second-main-surface side of connector holder. A shape of an edge of the guide pipe is a circle that has a cut-off portion. The cut-off portion has a radius of curvature that is larger than a radius of curvature of the circle.

The battery module has a structure in which a plurality of batteries are arranged at fixed positions by a battery holder, a lead plate is connected to a projecting electrode of each of the batteries, a potting resin is thermally coupled to the lead plate, the battery holder includes an outer peripheral cover having an electrode window to expose the projecting electrode, the lead plate has a connection recess that is locally formed in a planar part to let a protrusion face protrude toward the projecting electrode through the electrode window, and a sealing label is put into intimate contact with the planar part of the lead plate to close an opening of the connection recess. This structure prevents the potting resin from flowing into an outlet formed in the projecting electrode.

Battery module

This battery pack is assembled by welding an opening portion () of a waterproof bag () to provide an insertion opening () that is smaller than the total opening width (W) but allows a battery core pack () to be inserted, inserting the battery core pack () into the waterproof bag (), then, closing the opening portion () of the waterproof bag (), and placing the waterproof bag (), in which the battery core pack () has been placed, into an external case (). In this way, this battery pack can be assembled efficiently, with the battery core pack having been given a waterproof structure by the waterproof bag () while in an ideal state.

Battery pack and production method therefor

A battery pack includes terminals () and a lock hook (). The terminals () are fastened onto a circuit board () and connected to rechargeable batteries (). The terminals are exposed externally of a casing (). The hook () protrudes from a surface of the casing (), and holds the battery pack on a charger (). A hook opening window () is open in one of the surfaces of the casing. The hook () can protrude from the surface of the casing (). A drain hole () is open in another surface of the casing. A partition rib () is arranged between a path and an electronic circuit. The path is separated from the circuit. The path extends inside the casing () from the window (). The circuit is mounted on the board (). The window () communicates with the hole () through the path.

Growing community of inventors

Hyogo, Japan

Masami Haino