Compression debate turned on end

[Woodpecker66]

Hello All.

I have 3 of the Yixiang DIY 280AH battery boxes which are designed to be stacked on top of each other. The cells in the box
would be oriented with the terminals facing up. The general consensus on compression is around 12psi, so if the sides of the cells are
80 sq. in. then that equates to 960 pounds, is that correct? The reason I ask is I would like to stand these boxes on end rather than stack them on top of each other.
Based on cell weight, that would mean the bottom cell would have around 85 pounds sitting on top of it. Are horizontal compression force and static vertical weight load comparing apples & oranges? I know of one person who has done this with no issue for 6 months, but I want to be sure there is no chance of any long term negative effect on the lower cells having that much static weight sitting on top of them. I appreciate any input. Thanks

 

[jorby]

I could be wrong, but I don't think 9% more compression will mater. Isn't the weight going to be supported mostly by the box itself? Just thinking that an empty box on the bottom would not be crushed by a full one sitting on top of it, so the bottom cells will not see all of that weight.

 

[Woodpecker66]

I could be wrong, but I don't think 9% more compression will mater. Isn't the weight going to be supported mostly by the box itself? Just thinking that an empty box on the bottom would not be crushed by a full one sitting on top of it, so the bottom cells will not see all of that weight.

As designed, the box would support each cell individually. If I set the box on end I'd have 2 columns of 8 cells on top of each other so the bottom cell would have 85 pounds on it from the other 7 cells above it. Now that I think about it, that would be roughly 1 lb per square inch. Question is, does that 1 psi with gravity involved cause any deformation of the cell over time vs the 12 psi horizontal compression without gravity. Where's Sheldon Cooper when you need him?

 

[jorby]

OK, i understand what you mean now, the force within each box. I still think it will be ok. If time was a factor, the static compression would also cause deformation. My opinion is largely based on the idea that almost anything can be operated within 10% of "optimum" without serious repercussions.