Other

Matsushita Electric Industrial Co., Ltd.

Takehiro Chinen

Hiroki Takeshima

Kesaaki Kitazawa

Shigetoshi Takasu

Hironori Ura

Osamu Aoya

Ryoichi Hamasaki

A battery pack includes a plurality of cells () stacked on top of one another in tiers; a heat collecting plate () made of a wave-like metal sheet and interposed between tiers of the cells so as to make contact with outer peripheral surfaces of upper and lower tiers of the cells alternately; a heat pipe () having its heating portion () fitted into a fitting groove () formed in the heat collecting plate; a pack case () for accommodating the cells, the heat collecting plate, and the heat pipe; and a heat dissipating member () attached to the pack case so as to close an opening of the pack case and having on its inner-surface side a concavely-formed receiving groove () into which a heat dissipating portion () of the heat pipe is fitted.

Heat dissipating battery pack

The present invention relates to an improvement in a fixation roll consisting of several heat pipes embedded in the thick wall of the hollow cylindrical core in the axial direction, and features the fact that each of the heat pipes consisting of a copper tube and encapsulated water as the operating fluid is heated to allow the water as the operating fluid to evaporate to generate pressure and cause the heat pipe to expand and tightly fit onto the inner wall surface of the cylindrical bore in the core so as to form an integral and monolithic structure comprising the heat pipe and the core. Since the heat pipe is firmly fitted to the inner wall surface of the cylindrical bore in the core, a high quality fixation roll exhibiting a uniform surface temperature distribution is provided. Since the installation of the heat pipe is effected by means of the tube expansion, no strict dimensional control of the diameters of the bore for inserting the heat pipe as well as the heat pipe is required.

Method for making a fixation roller

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Aichi, Japan

Takehiro Chinen