Honda Motor Co., Ltd.

Arihisa Kimura

Goichi Katayama

Koichi Yamamoto

Kenji Shimizu

Masato Fujioka

Shinji Wada

Takeshi Ueda

Shuji Sasaki

Tooru Ohgaki

To connect a bus bar plate to a battery module, a plurality of recess portions provided on a plurality of holders so as to be spaced in the stacking direction are engaged with a plurality of projection portions provided on the bus bar plate to be spaced in the stacking direction. Since the lengths 'a' of the plurality of projection portions are the same, and the plurality of recess portions are formed from a first recess portion having a length 'a' and a second recess portion having a length &#x201c;b&#x201d; larger than the length &#x201c;a,&#x201d; the precision of positioning of the bus bar plate can be ensured by engagement between the projecting portion and the first recess portion, and even if the gap between the projecting portions or the recess portions is nonuniform, it is possible to assemble the bus bar plate onto the holder with high precision.

Battery module

A battery cooling structure includes a cooling plate and an electrically insulative sheet. The cooling plate is to support a cooling surface of a battery module to cool the battery module including a plurality of battery cells arranged side by side. The electrically insulative sheet has an electrical non-conductivity and is disposed between the cooling surface of the battery module and the cooling plate to transfer heat from the cooling surface to the cooling plate.

Battery cooling structure

A battery cooling structure in which a heat transfer sheet that can be deformed by pressure is held between a cooling plate and a cooling surface of a battery module in which a plurality of battery cells are stacked, and heat of the battery module is transferred from the cooling surface to the cooling plate via the heat transfer sheet to thus carry out cooling, wherein the cooling plate is a hollow member in which a cooling medium passage is formed for a cooling medium to flow, and the heat transfer sheet is formed so as to have a larger thickness in a middle part than in an outer peripheral part.

Battery cooling structure including heat transfer sheet

When a battery is supported on a cooling plate, since a heat transfer sheet, which is deformable by pressure, is held between the cooling plate and a cooling surface of the battery, it is possible to efficiently transfer the heat of the battery from the cooling surface to the cooling plate via the heat transfer sheet, thereby enhancing the effect in cooling the battery. Since the heat transfer sheet includes a plurality of through holes, compared with a case in which a heat transfer sheet does not include the through hole, the reaction force generated by restoration of the compressively deformed heat transfer sheet to its original shape is decreased, thus reducing the load acting on a mounting flange securing the battery to the cooling plate and thereby preventing the mounting flange from being broken.

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Wako, Japan

Arihisa Kimura