Battery pack

Patent metadata

Field	Value
Publication number	US-2025273786-A1
Application number	US-202519062010-A
Country	US
Kind code	A1
Filing date	Feb 25, 2025
Priority date	Feb 28, 2024
Publication date	Aug 28, 2025
Grant date	—

Abstract

The battery pack comprises: two cell modules arranged side by side in a first direction with an intermediate space therebetween, each of the two cell modules having a longitudinal direction parallel to the first direction and a lateral direction parallel to a second direction; a casing that houses the two cell modules, the casing having a main wall, which is a front wall or a rear wall spaced apart from the two cell modules in the second direction; and a reinforcement having at least a first wall disposed along the main wall, wherein the reinforcement overlaps the intermediate space and a part of each of the two cell modules in a front view.

First claim

1 . A battery pack mounted on a vehicle, comprising:
two cell modules arranged side by side in a first direction with an intermediate space therebetween, each of the two cell modules having a longitudinal direction parallel to the first direction and a lateral direction parallel to a second direction; a casing that houses the two cell modules, the casing having a main wall, which is a front wall or a rear wall spaced apart from the two cell modules in the second direction; and a reinforcement having at least a first wall disposed along the main wall, wherein the reinforcement overlaps the intermediate space and a part of each of the two cell modules in a front view.

2 . The battery pack according to claim 1 , wherein
the casing further includes a bottom wall and a top wall, and the reinforcement further includes a second wall disposed along the bottom wall or the top wall.

3 . The battery pack according to claim 1 , further comprising a fastening bracket that fastens the casing to a vehicle body, a part of which is attached to the main walls,
wherein the fastening bracket overlaps the reinforcement in the front view.

4 . The battery pack according to claim 1 , wherein
each of the plurality of cell modules comprises: a stacked body in which a plurality of battery cells are stacked; and, an end plate provided at an end portion of the stacked body closer to the intermediate space, wherein the battery pack further includes a protector interposed between the end plate and the first wall to inhibit contact between the plurality of cell modules and the first wall.

5 . The battery pack according to claim 4 , wherein
the end plate has a rib protruding toward the intermediate space, the protector is attached to the rib, and a center of gravity of the protector is higher than a center of gravity of the cell module.

Assignees

• Toyota Motor Co Ltd

Inventors

• Miwa Masaki
• Shinji Kento
• Ito Keita

Classifications

• B60Y2306/01

  Reducing damages in case of crash, e.g. by improving battery protection · CPC title

• B60K2001/0416

  Arrangement in the rear part of the vehicle · CPC title

• B60K2001/0433

  Arrangement under the rear seats · CPC title

• B60K1/04 Primary

  of the electric storage means for propulsion · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title