Voltage Battery Re-ignition by Stranded Energy
Damaged cells in the high voltage battery can experience thermal runaway* and reignition.
To prevent reignition, the first responder and second responder need to be aware of the risk of
stranded energy* which remains in the damaged cells and can lead to reignition.
*Thermal runaway : The originating cause of thermal runaway is generally short
circuiting inside a battery cell and a resulting increase in the cell’s internal temperature.
Battery produces heat with thermal runaway and it can spread from one battery cell to
many cells, in a domino effect.
*Stranded energy : Energy remains inside any undamaged battery cells after the
accident. Stranded energy can cause a high voltage battery to reignite multiple times
after a fire has been extinguished.
How to Prevent Re
-ignition (Mitigating Stranded Energy Risk)
12V battery (-) terminal disconnection (To depower battery management system)
High voltage shut off
*refer to page 8-10
Discharging the high voltage battery
*refer to page 27-28
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