US Patent Granted for Battery Cell by Prime Planet Energy

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 24th, 2026

Detected March 26th, 2026

Summary

The USPTO has granted a new patent (US12586878B2) to Prime Planet Energy & Solutions, Inc. for a battery cell design. The patent details specific structural features of the battery cell, including its electrode assembly, exterior container, and an insulating sheet with a folded portion.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12586878B2 to Prime Planet Energy & Solutions, Inc. for a novel battery cell design. The patent covers specific structural elements, including an electrode assembly, an exterior container, and a unique insulating sheet with a folded portion designed to improve functionality. The filing date for this patent was November 16, 2022, and it was granted on March 24, 2026.

This patent grant is primarily an intellectual property matter and does not impose new regulatory obligations on companies. However, it signifies innovation in the battery technology sector, which may be relevant for manufacturers and researchers in the energy storage industry. Companies operating in this space should be aware of granted patents to ensure freedom to operate and to identify potential licensing opportunities or competitive advancements.

Source document (simplified)

← USPTO Patent Grants

Battery cell

Grant US12586878B2 Kind: B2 Mar 24, 2026

Assignee

PRIME PLANET ENERGY & SOLUTIONS, INC.

Inventors

Hiroki Ishii

Abstract

A battery cell includes: an electrode assembly; an exterior container; two electrode terminals provided on an upper surface of the exterior container and arranged side by side in a first direction; and an insulating sheet that is in a form of a film and that is provided on the outer surface of the exterior container. The insulating sheet has a folded portion that reaches the upper surface from a short side surface of the exterior container. The folded portion includes a peak portion and valley portions, the peak portion protruding from the short side surface side to the two electrode terminals side along the first direction, the valley portions being located on both sides with respect to the peak portion in a second direction orthogonal to the first direction, each of the valley portions being recessed toward a side away from the two electrode terminals.