Apparatus for a Prismatic Battery Cell with Built-in Springs

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 31st, 2026

Detected March 31st, 2026

Summary

The USPTO granted GM Global Technology Operations LLC Patent US12592409B2 for an apparatus of a prismatic battery cell with built-in springs. The invention includes a hard outer case, electrode stack with anode and cathode layers, and a spring mechanism pressing perpendicular to electrode planar surfaces. The patent lists inventors Liang Xi, Binsong Li, and Srilakshmi Katar, with 20 claims.

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What changed

GM Global Technology Operations LLC has been granted US Patent 12592409B2 for a prismatic battery cell design featuring integrated springs. The apparatus comprises a hard outer case containing an electrode stack with stacked anode and cathode pair layers, plus a built-in spring configured to apply pressure perpendicular to the planar surface of each electrode layer. The patent application (No. 17950498) was filed on September 22, 2022, and contains 20 claims.

Patent holders and manufacturers in the electric vehicle and battery industries should note this intellectual property development for freedom-to-operate analysis and competitive intelligence. Companies developing prismatic battery cells should review this patent when designing similar spring-based pressure mechanisms for electrode stacks.

Source document (simplified)

← USPTO Patent Grants

Apparatus for a prismatic battery cell with built-in springs

Grant US12592409B2 Kind: B2 Mar 31, 2026

Assignee

GM Global Technology Operations LLC

Inventors

Liang Xi, Binsong Li, Srilakshmi Katar

Abstract

An apparatus for prismatic battery cell is provided. The apparatus includes a hard outer case defining an internal volume. The apparatus further includes an electrode stack disposed within the internal volume and includes a pair of an anode electrode and a cathode electrode. The electrode stack further includes a plurality of electrode pair layers stacked parallel to each other. The electrode pair layers each include a planar surface. The apparatus further includes a built-in spring configured for pressing against the electrode stack in a direction perpendicular to the planar surface of each of the electrode pair layers.