Toyota Jidosha Kabushiki Kaisha

Toyoda Gosei Co., Ltd.

Taiho Kogyo Co., Ltd.

Tatsuhiko Shimizu

Hitoshi Hamada

Yoshiki Nakamura

Tadanobu Ota

Tatsuya Tokumasu

Yutaka Hotta

Shoji Yokoishi

Hiroyuki Kimoto

A fuel cell stackincludes a fuel cell stack, and an end plateplaced at an end of the fuel cell stack. The end plateincludes a metallic plate-like body, and a resin layerformed on a surfaceof the plate-like body. The plate-like bodyincludes flow holesfor a reactant gas and a cooling medium, and a stripe-shaped protrusionprotruding from the surfaceand which divides the surfaceinto an inner area containing the flow holesand an outer area outside the inner area. The protrusionincludes a vertical portionprotruding from the surface, and a jutted portionjutted from a distal end of the vertical portiontoward the inner area. The resin layeris formed in the inner area to cover a surfaceof the vertical portionfacing the inner area as well as at least part of the jutted portion

Fuel cell end plate with resin layer and protrusion

A fuel cell stack includes a stack; a case that accommodates the stack; and end plates arranged in the outside of a stacking direction and formed with fluid flow path holes penetrating in the stacking direction an accommodating groove for accommodating a seal member for sealing a part between the accommodating groove and the case. The end plates have a metal member formed with the fluid flow path holes, a first recess and a second recess that continues to the first recess, and a resin layer that continuously covers an inner peripheral wall surface of the fluid flow path holes, a surface that faces the stack, a part that includes at least an outer peripheral side end in the first recess, and the second recess, in the metal member. The resin layer is formed with the accommodating groove in a surface corresponding to the end surface of the case in a part covering the part that includes at least the outer peripheral side end in the first recess. The second recess accommodates a part of the resin layer to restrict the resin layer.

Fuel cell stack

A fuel cell stack comprises a stacked body, an end plate and a case configured such that the stacked body is placed therein. The end plate is arranged to cover an end face of the stacked body in a stacking direction and an end face of the case in the stacking direction and is fastened to the end face of the case. A placement groove is formed in at least one surface out of two surfaces of the end plate and the case opposed to each other, such that a seal member is placed in the placement groove. The end plate includes a resin layer formed to continuously cover an inner circumferential wall surface of the fluid flow path hole, a surface of the end plate opposed to the stacked body, and an outer circumferential side end of the placement groove.

A charger includes a control unit, which provides the capacitor with electricity, and charges the capacitor. While charging is being executed, the stored charge will increase, and each of the potentials of the positive electrode and the negative electrode will increase. The potential of the positive electrode V+, the potential of the negative electrode V-, the decomposition potential of the positive electrode, and the decomposition potential of the negative electrode are compared with each other. At first, both the potential of the positive electrode and the potential of the negative electrode are smaller than the decomposition potentials. During charging, if it is detected that at least one of the potentials of the positive electrode or the negative electrode reaches the decomposition potential, the control unit stops charging.

Charger for electrically charging a capacitor

An electric double layer capacitor which is usable at a high voltage without causing an irreversible current. Both a polarized positive electrode 14 and a polarized negative electrode 16 are made of the same constituents. However, a ratio of an amount of constituents of the polarized positive electrode 14 differs from that of the polarized negative electrode 16. A ratio of a capacitance of the polarized positive electrode to a capacitance of the polarized negative electrode is controlled such that the polarized positive electrode and the polarized negative electrode simultaneously reach respective potentials where the irreversible current is caused. According to this invention there is an advantage that it is possible to increase a voltage applied to the electric double layer capacitor.

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Toyota, Japan

Tatsuhiko Shimizu