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Migrating from GB 38031-2020

The 2025 revision is substantial. The headline is the new pack-level thermal-propagation pass criterion — no fire, no explosion plus a 5-minute warning signal — but two new tests were added (8.1.8 fast-charge, 8.2.16 bottom impact), a new "same type" framework (Chapter 9) was created, and most pack/system tests had either their requirements or their method revised.

Pages

  • Quick diff — top-level summary of every change called out in the preface.
  • Newly added tests — 8.1.8 (safety after fast-charge cycles) and 8.2.16 (bottom impact).
  • Tests that got stricter — clauses where the requirements (5.x) were revised; thermal propagation (5.2.7) is the headline.
  • Tests with methodology changes — clauses where the method (8.x) was revised, with notes on which also had requirement changes ("both").
  • Re-certification timeline — clause 10 dates and what they mean for OEMs with 2025–2027 product roadmaps.

See also

  • Same type determination and Table 7 — both new in 2025 and central to deciding whether a 2020-era pack needs full re-testing or can ride on partial-change supplements.
  • All tests at a glance — the per-test status column already reflects 2020 → 2025 deltas.