Kia OPTIMA PHEV - Preventing High Voltage Battery Re-ignition

6. In
Case of Fire
6.4 High Voltage Battery Re-ignition by Stranded Energy
Damaged cells in the high voltage battery can experience thermal runaway* and re-ignition. To
prevent rei-gnition, 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 re-ignition.
*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)
1.
12V battery (-) terminal disconnection (To depower battery management system)
2.
High voltage shut off
*refer to page 12
3.
Discharging the high voltage battery
*refer to page 27
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OPTIMA PHEV