Warpspeed
Solar Wizard
The flat faces of the bare cells are just not designed to withstand the internal gas pressure that can be reached, all by themselves without some extra support.
To do so would require a much larger, heavier, and more expensive cell housing for every individual cell.
The solution suggested by the cell manufacture is to clamp the cells as a group by surrounding the whole battery within a rigid structure that the customer has to provide. There is a great deal of misunderstanding about all this, and the literature often translated into a "form of English" is often not very helpful.
The idea that springs or rubber bands or ratchet straps (or whatever) to apply some king of soft continuous squeezing action, may help a bit, but is not really a solution, especially for the end cells.
What is really needed is something very flat, stiff, and completely unyielding across the flat faces of the cells.
Rather like blowing up a balloon constrained in a cardboard box.
The balloon cannot resist swelling under increased increased pressure by itself, but the cardboard box will.
If you want to stop a balloon from bursting, just wrapping a string around it will not work.
To do so would require a much larger, heavier, and more expensive cell housing for every individual cell.
The solution suggested by the cell manufacture is to clamp the cells as a group by surrounding the whole battery within a rigid structure that the customer has to provide. There is a great deal of misunderstanding about all this, and the literature often translated into a "form of English" is often not very helpful.
The idea that springs or rubber bands or ratchet straps (or whatever) to apply some king of soft continuous squeezing action, may help a bit, but is not really a solution, especially for the end cells.
What is really needed is something very flat, stiff, and completely unyielding across the flat faces of the cells.
Rather like blowing up a balloon constrained in a cardboard box.
The balloon cannot resist swelling under increased increased pressure by itself, but the cardboard box will.
If you want to stop a balloon from bursting, just wrapping a string around it will not work.
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