A new mandatory national standard for electric vehicle batteries, known as “Safety Requirements for Power Batteries Used in Electric Vehicles” (GB38031-2025), has been released by the Ministry of Industry and Information Technology. This standard will take effect on July 1, 2026.
The recent revisions clarify several important parameters, including the temperature requirements for testing batteries, conditions for power on and off states, observation times, and testing conditions for the entire vehicle. The technical requirements have been updated from the previous requirement of providing an alarm signal for thermal events occurring within five minutes prior to ignition or explosion, to ensuring that the batteries do not ignite or explode (while still requiring alarm signals) and that the emitted gases do not harm passengers.
Additionally, new tests have been introduced, such as a <b>bottom impact test</b> to evaluate the battery's protective capability when subjected to impacts on its base. A safety test following fast charging cycles has also been added, which involves conducting external short-circuit tests after <b>300 fast charge cycles</b> to confirm that there is no ignition or explosion.
Furthermore, the revised standard specifies that it applies specifically to power batteries used in electric vehicles, excluding non-driven batteries. Improvements have been made to the insulation resistance requirements, which now include resistance requirements for battery systems with alternating current circuits. The extrusion testing requirements have been enhanced, and additional criteria for determining insulation resistance have been introduced.
(Reporter: Liu Kun)
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