# US 2026/0074352 A1 · Battery module

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- Number: US 2026/0074352 A1
- Document ID: US20260074352A1
- Status: Published application
- Kind: A1
- Application number: 19/276,240
- Filed: 2025-07-22
- Published: 2026-03-12
- Earliest claimed: 2024-09-06
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Tomoya HAYASHI; Yusuke TAKASHI
- Web page: https://patentgrep.com/patent/US20260074352A1

## CPC

- H01M 50/291: characterised by their shape
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/258: Modular batteries; Casings provided with means for assembling
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A battery module includes: battery cells stacked in a first direction; and a spacer disposed between the plurality of battery cells adjacent to each other. Each of the battery cells includes a rectangular battery case containing an electrode body and an electrolyte solution therein, the spacer includes a pressing portion configured to press the battery cells in the first direction by making contact with a predetermined pressing region of the rectangular battery case, the pressing region is configured to overlap a central portion of the electrode body and not to overlap both end portions of the electrode body in a width direction of the battery cell, and the pressing portion has a shape in which a portion overlapping a lower side portion than the central portion of the electrode body is larger than a portion overlapping an upper side portion than the central portion of the electrode body.

## Claims

### Claim 1

A battery module comprising:
a plurality of battery cells stacked in a first direction; and
a spacer disposed between the plurality of battery cells adjacent to each other,
wherein each of the plurality of battery cells includes a rectangular battery case containing an electrode body and an electrolyte solution therein,
the spacer includes a pressing portion configured to press the plurality of battery cells in the first direction by making contact with a predetermined pressing region of an outer surface of the rectangular battery case,
the pressing region, as viewed from the first direction, is configured to overlap a central portion of the electrode body and not to overlap both end portions of the electrode body in a width direction of the battery cell, and
the pressing portion, when viewed from the first direction, has a shape in which a portion overlapping a lower side portion than the central portion of the electrode body is larger than a portion overlapping an upper side portion than the central portion of the electrode body.

### Claim 2 (depends on 1)

The battery module according to claim 1, wherein the pressing portion, as viewed from the first direction, has a trapezoidal shape in which a lower bottom is longer than an upper bottom.

### Claim 3 (depends on 2)

The battery module according to claim 2, wherein
a length of the upper bottom is 60 to 65% of a width of each of the plurality of battery cells,
a length of the lower bottom is 70 to 80% of the width of each of the plurality of battery cells, and
a height of the trapezoidal shape is 70 to 80% of a height of each of the plurality of battery cells.