Sturdy Floor stand?
 

Instead of taking my battery pack off the bike after every ride I would rather back the rear wheel into a stand in the garage and charge the batteries on the bike. The bike is very top heavy with the 4 SLA batteries. Any suggestions?

i just park my bike up to the wall and plug it in.

My kids are running in and out. If it is not secured it will end up splattered on the floor. Someone mentioned building a stand out of a wooden pallet but I couldn't find any plans?