We use similar batteries where I work. They go on charging runaway about once a week. First the smell begins. Then the heavy sulphur smell feels heavy in your lungs. Then the smoke begins. At that point I throw the disconnect from about a hundred yards away and wait until the stink clears. Then I call the battery company who comes out and replaces the unit for about $23,000 dollars. It’s a good business to be in. That is until someone decided to get them approved for an airworthiness application / use! Vehicles on the ground have a use profile of maybe two hours a day. Aircraft run 24/7 until a maintenance cycle.
Good points, I’m amazed they were approved for airliners.
Not only are vehicles used less but if an incident occurs you can stop and get out but that’s kinda difficult at an altitude of 35,000 ft.
Have you considered lead-acid or nickel-iron replacements?