It's not intended for manual access. The goal would be to sit back, douse the car with a firehouse, and leave enough of an open path so that the water pressure alone breaks the seal and floods the battery. This is what firefighters are already doing, so this design simply makes the default action more effective. I'm a big fan!

> When attacking the vehicle fire, understanding that once the contents of the fire are extinguished, sustained suppression on the battery pack may be necessary. Use a large volume of water such as multiple 1 3/4-inch hand-lines to suppress and cool the fire and the battery. Put water on the burning surfaces.

https://www.iafc.org/topics-and-tools/resources/resource/iaf...