Industry System
EV Battery Formation Recipes & SEI Precharge Anomaly Diagnostics
Six deployed formation recipes for R1S, R2, and R3 battery cells with improved Supercharger compatibility at Rivian.
Context & Engineering Scope
Electrochemical cell formation recipes and precharge diagnostic protocols developed at Rivian for the R1S, R2, and R3 battery programs.
Optimizing lithium-ion cell formation requires controlling Solid Electrolyte Interphase (SEI) nucleation during precharge while improving fast-charging compatibility across vehicle platforms.
Methodology & System Design
- 01. R1S, R2 & R3 Recipe Engineering: Developed proprietary formation recipes for R1S, R2, and R3 models with higher compatibility on Tesla’s Supercharger network.
- 02. SEI Precharge Anomaly Protocols: Developed diagnostic protocols to detect Solid Electrolyte Interphase (SEI) formation anomalies during precharge steps.
- 03. Production & Development Standardization: Deployed 6 formation recipes (4 development recipes and 2 production recipes) into manufacturing workflows.
Key Results
- Deployed 6 formation recipes (4 development, 2 production) that served as the standard baseline from December 2021 to December 2022.
- Improved fast-charging compatibility with Tesla’s Supercharger network across R1S, R2, and R3 cell builds.