SAE J1798/1 MAY2026 provides common test and verification methods for determining the performance of lead-acid and nickel-metal-hydride electric vehicle battery modules. The recommended practice covers battery module selection, test conditions, data recording, static capacity testing using constant-current and constant-power methods, charge retention, charge acceptance, peak power capability, and dynamic capacity testing.
The document is intended to help battery manufacturers, vehicle manufacturers, test facilities, and other purchasers establish or verify module performance using consistent testing platforms. It addresses independently packaged propulsion battery modules operating at ambient temperature and includes guidance for testing across specified temperatures, discharge rates, power profiles, voltage and temperature limits, and reporting requirements.
Issued 2020-08, reaffirmed 2026-05, and superseding SAE J1798/1 AUG2020. Copyright 2026 SAE International.
Application Scope: Electric vehicle propulsion battery modules using lead-acid or nickel-metal-hydride chemistries, including performance evaluation, manufacturer verification, comparative testing, vehicle application screening, thermal management assessment, and battery module qualification.
