Mazda Motor Corporation

Kazuhisa Hatano

Morihide Yamada

Munenari Takahashi

Hisashi Akune

Yamato Matsuda

Nobuyuki Nakayama

Shuji Muraoka

Harumitsu Kubota

Toshihiro Takebayashi

Hidetaka Goto

Toshiyuki Koga

Koutaro Takada

A battery unit which stores plural battery modules therein is attached to respective lower faces of a pair of floor frames at its both sides. The battery unit comprises an attaching bracket which protrudes substantially horizontally from the battery case and is positioned just below the lower face of the floor frame with a distance therebetween. A specified rigidity ratio is set for an attachment portion of the battery unit to the floor frame, and the attaching bracket is attached to the lower face of the floor frame via an intermediate part such that the above-described rigidity ratio is 0.1 or greater.

Electric motor vehicle battery support assembly

There are provided a floor panel, a pair of right-and-left floor frames, and a battery unit supporting a battery module and mounted at the floor frames. The battery unit comprises the battery module, a pair of right-and-left side frames mounted at the pair of floor frames, and a pair of front-and-rear module supporting mechanisms which comprises a pair of front-and-rear cross frames respectively extending in a vehicle width direction and interconnecting the pair of side frames and mounting brackets supporting a front end portion and a rear end portion of the battery module. Bending rigidity, in a vertical direction, of the module supporting mechanism comprising the third cross frame and the first mounting bracket is set to be lower than that of the side frame.

Battery unit mounting structure of electric vehicle

A lower vehicle-body structure of a vehicle includes a first cross member disposed on an intermediate portion of a front floor panel in a vehicle front-rear direction as a bridge in a vehicle width direction; a second cross member disposed in a kick-up portion between the front floor panel and a rear floor panel as a bridge in the vehicle width direction at a position in which at least a center portion in the vehicle width direction is higher than the first cross member; and a battery unit disposed below at least the front floor panel to a rear end position of the front floor panel. A high-strength portion for the front floor panel is formed on a rear end of the front floor panel on a lower end portion of the kick-up portion, and is coupled to both of a pair of left and right side sills.

Lower vehicle-body structure of vehicle

A battery unit comprises side frames, cross frames, and plural battery modules having substantially the same size comprising a longitudinal dimension, a lateral dimension, and a height dimension. The battery modules are respectively mounted at the cross frames in the same position and arranged in plural rows adjacently to a vehicle width direction such that a direction of the above-described longitudinal dimension is substantially parallel to a vehicle longitudinal direction, and mounting rigidity of the battery modules stored in a first storage area is set to be different from that of the battery modules stored in second and third storage areas.

A battery unit comprises plural battery modules and a battery case storing the plural battery modules, and is arranged over a range from a first storage area located below a front seat to second and third storage areas located in back of the front seat. The number of front-side fastening portions of the battery modules corresponding to the first storage area is set to be smaller than the number of rear-side fastening portions of the battery modules corresponding to the first storage area. The fastening portion is arranged on an inward side, in a vehicle width direction, of the fastening portion provided at an outward side in the vehicle width direction.

A side body vehicle structure is disclosed that has a pair of left and right side sills and opposite swing type side doors. The side sills may have an upper flange portion facing the rear door in the vehicle width direction which functions as a rear door facing part, and the upper flange portion of a more forward part of the vehicle than the rear door facing part may function as a front door facing part. The rear door facing part may be formed in a shape having a length in the vehicle vertical direction longer than a length in a vehicle vertical direction of the front door facing part. In a vertical cross section along the vehicle width direction, a gusset member may form a closed cross section with the side sill inner member, and an upper end thereof may be joined to the rear door facing part.

Growing community of inventors

Hiroshima, Japan

Kazuhisa Hatano