Battery unit mounting structure of electric vehicle

Patent metadata

Field	Value
Publication number	US-2020376947-A1
Application number	US-202016817855-A
Country	US
Kind code	A1
Filing date	Mar 13, 2020
Priority date	May 30, 2019
Publication date	Dec 3, 2020
Grant date	—

Abstract

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.

First claim

What is claimed is:

1 . A battery unit mounting structure of an electric vehicle, comprising:
a floor panel; a pair of right-and-left floor frames provided below the floor panel, each of which forms a closed-cross section extending longitudinally cooperatively with the floor panel; and a battery unit supporting a battery module and mounted at the pair of floor frames, wherein said battery unit comprises the battery module, a pair of right-and-left side frames mounted at said pair of floor frames, and a pair of front-and-rear module supporting mechanisms which include a pair of front-and-rear cross frames respectively extending in a vehicle width direction and interconnecting said pair of side frames and support a front end portion and a rear end portion of said battery module, and bending rigidity, in a vertical direction, of said module supporting mechanism is set to be lower than that of said side frame.

2 . The battery unit mounting structure of the electric vehicle of claim 1 , wherein bending rigidity, in the vertical direction, of said cross frame is set to be lower than that of said floor frame, and said bending rigidity, in the vertical direction, of the module supporting mechanism is set to be 25 % of said bending rigidity, in the vertical direction, of the side frame or lower.

3 . The battery unit mounting structure of the electric vehicle of claim 1 , wherein said module supporting mechanism comprises a mounting bracket to mount said battery module at said cross frame vertically movably, and bending rigidity, in the vertical direction, of said mounting bracket is set to be lower than that of the cross frame.

4 . The battery unit mounting structure of the electric vehicle of claim 3 , wherein said mounting bracket comprises a connecting wall portion extending in the vertical direction and connected to said battery module and a fixing wall portion extending in an opposite direction to the battery module from a lower end part of said connecting wall portion and fixed to an upper wall portion of said cross frame, and said fixing wall portion of the mounting bracket is configured to protrude toward the battery module from the upper wall portion of the cross frame.

5 . The battery unit mounting structure of the electric vehicle of claim 3 , wherein said battery unit comprises a battery tray which is supported at said side frame and forms a bottom portion of the battery unit.

Assignees

• Mazda Motor

Inventors

• Yamada Morihide
• Hatano Kazuhisa
• Akune Hisashi
• Takahashi Munenari

Classifications

• H01M50/244

  Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method · CPC title

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• B60K1/04 Primary

  of the electric storage means for propulsion · CPC title

• B60L50/66

  Arrangements of batteries · CPC title

• B62D25/20

  Floors or bottom sub-units {(sub-frames for mounting engine or suspensions B62D21/11; drip trays F16N31/006)} · CPC title