Method and system for a safety concept for an AC battery

US11777436B2 · kind B2 · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Harald Schöffler · Wieslensdorf, DE
• Sven Lill · Kaufbeuren, DE
• Hermann Dibos · Remchingen, DE
• Daniel L. Simon · Glendale, US
• Eduard Specht · Dormagen, DE
• Christian Korte · Karlsruhe, DE
• Jan Kacetl · Gemmrigheim, DE
• Tomas Kacetl · Gemmrigheim, DE

Key dates

• Filing date: Nov 4, 2021
• Grant date: Oct 3, 2023
• Expiry date: Nov 4, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/64
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for a safety concept for an AC battery, in which the AC battery includes a central controller, a plurality of battery modules which respectively have a power board with a plurality of switching states, a plurality of contactors, a plurality of current sensors, a fault loop and a high-speed bus and is connected to a traction machine. The central controller has a hardware-programmable processor unit with at least one microprocessor core on which a control program is configured to control the battery modules, the plurality of contactors and the fault loop. A state machine is implemented by the control program. The battery modules are connected, starting from the central controller, via the high-speed bus and the fault loop. If an abort fault occurs, the AC battery is changed to a safe operating state. The safe state is achieved at least by emergency disconnection of the central controller.