USPTO Patent Application: Bipolar Plate Production Method

ChangeBridge: Patent Apps - Batteries (H01M)

Published July 19th, 2023

Detected March 26th, 2026

Summary

The USPTO has published a patent application (US20260084349A1) for a bipolar plate production method, filed by SCHAEFFLER Technologies AG & CO. KG. The application details a method for producing bipolar plates for electrochemical cells using foil sections made of polymer graphite material.

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What changed

This document is a patent application (US20260084349A1) filed with the USPTO by SCHAEFFLER Technologies AG & CO. KG, detailing a method for producing bipolar plates for electrochemical cells. The method involves providing foil sections of polymer graphite material, inserting them into an embossing and molding tool, and using gas pressure differences to form a hollow structure between the foil sections before they solidify.

As this is a patent application, it does not impose immediate compliance obligations on regulated entities. However, it represents a new development in the field of battery component manufacturing. Companies operating in this sector, particularly those involved in the production of electrochemical cells and their components, should be aware of this filing as it may impact future intellectual property landscapes and manufacturing processes.

Source document (simplified)

← USPTO Patent Applications

BIPOLAR PLATE PRODUCTION METHOD, BIPOLAR PLATE AND ELECTROMECHANICAL CELL

Application US20260084349A1 Kind: A1 Mar 26, 2026

Assignee

SCHAEFFLER Technologies AG & CO. KG

Inventors

Roland Karpinski, Heiko Ballmes, Philipp Mayer, Torsten Keller

Abstract

The disclosure relates to a bipolar plate production method for producing a bipolar plate, in particular for an electrochemical cell, which method comprises the following steps:
providing two foil sections made of a polymer graphite material comprising at least one polymer and at least 75 wt. % of an electrically conductive filler comprising predominantly graphite and also carbon black,inserting the two foil sections into an embossing and molding tool, closing the tool, wherein the foil sections are embossed and tightly connected to one another at their edges,forming a hollow structure between the foil sections by means of gas pressure differences at the foil surfaces, wherein the foil sections rest against surface structures of tool surfaces, which face one another, of the embossing and molding tool,removing the bipolar plate, formed from the foil sections, from the embossing and molding tool after the foil sections have solidified.