Sony Corporation

Murata Manufacturing Co., Ltd.

Murata Manufactruing Co., Ltd.

Fumihiko Suzuki

Hiroyuki Yamada

Takayuki Yamahira

Kazuo Togashi

Toru Ishii

Osamu Takahashi

Takayuki Aita

Yasushi Mori

Kenichi Ozawa

Kouji Watanabe

Hirotaka Sakai

Hiroaki Kanno

A battery module includes a plurality of flat or square type batteries that each have a positive terminal and a negative terminal; a holder that has an opening, and retains the batteries in such a manner that the positive terminal and the negative terminal are positioned toward the opening, and that the principal surfaces of the batteries face each other; a cover that is disposed over the opening; a circuit board that is disposed over the cover; and a plurality of connection members that are disposed between the cover and the circuit board to electrically connect the positive terminal and negative terminal. Some of the connection members retain a peripheral portion of the circuit board.

Battery module, power tool, and electronic apparatus

Provided herein is a battery pack including a plurality of secondary batteries, a containing member, a protective member, and a wiring member. The plurality of secondary batteries include a plurality of terminals at each secondary battery. The containing member contains the plurality secondary batteries to expose the plurality of terminals. The protective member includes a plurality of openings, and the plurality of secondary batteries contained in the containing member are covered with the protective member to expose the plurality of terminals from the plurality of openings. The wiring member is coupled to the plurality of terminals exposed from the plurality of openings. One or both of the containing member and the protective member include one or both of a ceramic material and a polymer material having a heat resistance temperature of 300&#xb0; C. or higher.

Battery pack, electric power tool, and electronic apparatus

A battery pack is provided. For example, the battery pack includes a box-shaped or plate-shaped battery pack. The battery pack has a hard outer jacket member, a box-shaped or plate-shaped battery element, a cover, and a circuit board. The hard outer jacket member has a first opening and a second opening formed at both ends. The box-shaped or plate-shaped battery element is contained in the outer jacket member and has electrode terminals. The cover is molded from resin and is fitted to the first opening. The circuit board is connected to the electrode terminal leads and contained in the cover. At least the electrode terminal leads extends from the first opening. The cover has concave portions on both ends of one longer side. The outer jacket member has cut portions that expose at least the concave portions of the cover. At least a longer side of the cover and the outer jacket member are heat-adhered.

Battery pack

A battery pack which can increase of the volumetric efficiency of the battery pack without being contained in a resin mold case is provided. A first laminate material has a concave portion formed by drawing where a battery element is contained. A second laminate material is stacked so as to cover the opening of the concave portion to seal up the periphery of the opening. The first and second laminate materials are bend inwards so as to cover the battery element, and bonded and fixed together by heating. The first laminate material has three-layer structure including a polypropylene layer, a soft aluminum layer, and a nylon layer or PET layer. The second laminate material has a similar structure but includes a hard aluminum layer. Therefore, the second laminate material has enough strength to resist deformation without being contained a cell in a resin mold case.

A battery pack and method of manufacturing same are provided. The battery pack can stabilize bending of a lead housed in a space defined by an external package. Leadsof a battery element are bonded to a circuit board housed in a top cover. A holderis mechanically fitted to the top covermade of resin molded material and produced by injection molding, for example. The edge faces of ribsformed on the holderserve as planes which receive the circuit boardin the top cover. The top coverand the holderfitted to each other are turned 90&#xb0;, and moved toward the opening in the edge face of the cellwhile bending the leadswhich are bent along the contours of both the sidewalls and bottom surface of the holderand housed in a space defined by the external package. The circumferential surface of the top coveris bonded by heat to the inner surface of the external package.

Growing community of inventors

Fukushima, Japan

Fumihiko Suzuki