Electrochemical solid storage cell, and method for producing an electrochemical solid storage cell

A dimensionally stable housing for solid-state batteries uses irreversible volume expansion to generate operating pressure, addressing the challenges of manufacturing and integration, improving energy density and reducing complexity in battery modules.

WO2025201773A1PCT designated stage Publication Date: 2025-10-02BAYERISCHE MOTOREN WERKE AG
View PDF 4 Cites 0 Cited by

Patent Information

Application Number
PCT/EP2025/055057
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-28
Filing Date
2025-02-25
Publication Date
2025-10-02

Smart Images

  • Figure EP2025055057_02102025_PF_FP_ABST
    Figure EP2025055057_02102025_PF_FP_ABST
Patent Text Reader

Abstract

An electrochemical solid storage cell comprises a dimensionally stable housing (10), in particular a housing (10) which is dimensionally stable under an operating pressure of the solid storage cell. A layer sequence comprises a multiplicity of cathode layers (21), solid electrolyte layers (22) and anode layers (23), the layers being stacked along the smallest cross-section of the housing (10) to form a cell stack (20). As a result of the material selected for the layer sequence, the cell stack (20) is configured to undergo irreversible volume expansion during the first charge. The volume expansion of the anode layers (23) during the first charging process is designed such that it is greater than the accompanying volume contraction of the cathode layers (21) and at least partially endures after the first charging. During operation of the solid storage cell, the operating pressure in the housing (10) is set as a result of the at least partially enduring volume expansion.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • METHOD FOR PRODUCING A SOLID BATTERY

    DE102018219088A1

  • Lithium ion secondary cell module

    JP2016085895A

  • Method for manufacturing all-solid battery

    JP2020107389A

  • Solid-state battery, and method of producing solid-state battery

    US20240021894A1