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Which hazard makes battery damage particularly serious?

  • A.The loss of the structural stiffness that the pack contributes, which leaves the vehicle unable to support itself
  • B.Thermal runaway propagating between cells
  • C.The release of hydrogen gas, which accumulates within the passenger compartment and presents an explosion risk
  • D.Electrolyte freezing

Answer: B

A damaged cell can overheat and ignite, and the heat released can propagate to neighbouring cells in a self sustaining chain that is very difficult to extinguish. Pack design incorporates barriers and venting to limit propagation. Reignition hours or days after an incident is a recognised hazard that emergency services must plan for.

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