Toyota Granted Patent for Power Storage Device Manufacturing Apparatus

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 24th, 2026

Detected March 26th, 2026

Summary

The USPTO has granted a patent to Toyota Jidosha Kabushiki Kaisha for a novel manufacturing apparatus and method for power storage devices. The patent details a system for precisely filling and curing photo-curing resin around laminated electrode bodies within a specialized mold.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12586813B2 to Toyota Jidosha Kabushiki Kaisha for an apparatus and method used in manufacturing power storage devices. The patent specifically describes a resin filling mold designed to create an internal space for a laminated electrode body and supply photo-curing resin. It includes a light radiation device to cure the resin, with a mechanism to control the resin flow and curing process along the sides of the electrode body.

This patent grant is primarily an intellectual property event and does not impose new regulatory obligations on manufacturers. However, it signifies an advancement in battery manufacturing technology that competitors may need to be aware of. Companies involved in power storage device manufacturing, particularly those utilizing similar resin-based encapsulation techniques, should review the patent to understand potential intellectual property considerations and technological developments in the field.

Source document (simplified)

← USPTO Patent Grants

Manufacturing apparatus and manufacturing method of power storage device

Grant US12586813B2 Kind: B2 Mar 24, 2026

Assignee

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventors

Masato Ono, Kazuhito Kato, Katsuaki Odagi, Kazumasa Inata, Yousuke Koide, Tomohiro Kitade, Atsushi Suganuma

Abstract

A manufacturing apparatus of a power storage device includes a resin filling mold configured to form an internal space that houses a laminated electrode body and to supply photo-curing resin used for forming a resin layer on at least a side surface on a long side of the laminated electrode body. The mold includes an upper mold, a lower mold, and two side surface molds on the long sides. Further, the manufacturing apparatus includes a light radiation device that radiates light which photo-cures the photo-curing resin supplied to the internal space. The manufacturing apparatus is configured to, when a front part of the supplied photo-curing resin that flows along the side surface reaches a predetermined position of the side surface, cure the flowing front parts by radiating the light from the light radiation device and stop the flowing front part from flowing along the side surface.

CPC Classifications

H01M 10/0585 H01M 10/128 H01M 10/14 H01M 10/16 H01M 10/281 H01M 10/287 H01M 10/28838 H01M 10/3987 H01M 10/0468 H01M 10/0404 H01M 10/0413 H01M 50/103 H01M 50/166 H01M 50/207 H01M 50/209