High voltage battery drain valve thermal runaway plug

A battery for a vehicle, comprising:

• a housing;
• a drain assembly having a first section within the housing and a second section outside of the housing;
• a fluid path through the drain assembly for flow of a fluid from the battery;
• a plug disposed at a first position out of the fluid path;
• a retaining device that retains the plug in the first position, wherein the retaining device is configured to release the plug when an environmental parameter of the battery exceeds a threshold;
• and
• a biasing device that biases the plug towards a second position in the fluid path.

A vehicle, comprising:

• a battery having a housing;
• a drain assembly having a first section within the housing and a second section outside of the housing;
• a fluid path through the drain assembly for flow of a fluid from the battery;
• a plug disposed at a first position out of the fluid path;
• a retaining device that retains the plug in the first position, wherein the retaining device is configured to release the plug when an environmental parameter of the battery exceeds a threshold;
• and
• a biasing device that biases the plug towards a second position in the fluid path.