Electrical energy storage element, method and apparatus for producing said electrical energy storage element

US10236534B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• THYSSENKRUPP SYSTEM ENGINEERING GMBH · DE
• thyssenkrupp AG · DE

Inventors

• Mareike Wolter · Dresden, DE
• Kristian Nikolowski · Dresden, DE
• Uwe Partsch · Dresden, DE
• Michael Roscher · Großschirma, DE
• Thomas Echelmeyer · Chemnitz, DE
• Daniel Tittel · Freiberg, DE
• Michael Clauss · Hofheim, DE

Key dates

• Filing date: Jun 5, 2015
• Grant date: Mar 19, 2019
• Expiry date: Jan 18, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

In the electrical energy storage element in accordance with the invention, a plurality of electrochemical cells that are each formed with a cathode and an anode as electrodes and an electrolyte are arranged stacked above one another. They are enclosed at one side by a top plate formed from an electrically conductive material, in particular aluminum, and at the oppositely disposed side by a base plate formed from an electrically conductive material, in particular aluminum. The base plate is coated by a cathode or by an anode and the cover plate is coated in a complementary manner by an anode or by a cathode. The anodes and cathodes are each formed at oppositely disposed surfaces of an electrically conductive carrier film which preferably comprises aluminum, copper, steel or an electrically conductive plastic. An outer peripheral margin is present at the carrier film that is free of electrode material and connects adjacent electrochemical cells to one another in a hermetically sealed manner with respect to the environment by means of a sealing and bonding agent. The anodes comprise a lithium titanate (LTO) having a spinel structure and the high-voltage cathodes are formed from a lith…