Apexium 280 battery box gap next to cells

[timblack1]

I'm assembling a Apexium 280 battery box I got from Jenny Wu / Docan Power. Its build quality seems excellent. I noticed there is a small gap between the left group of cells and the central metal frame member. The gap is about the thickness of the foam pads provided in the kit. The assembly manual and video do not indicate these pads should be inserted in this gap. The right group of cells has a similar but smaller gap; it is about 2/3 the size of the gap on the left side.

Should I fill these gaps to prevent the batteries from sliding left and right? I'm installing this battery in a camping trailer, so I'm concerned to prevent vibrations as much as I can.

Pictures of the larger gap are below.

2 new items by Tim Black

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[Bananaman321]

If proper compression is applied I don't believe batteries will be moving anywhere.

I have ordered seven of these boxes from Jenny Wu myself that are on their way from China

hope this helps

 

[timblack1]

Ray Builds Cool Stuff's videos on the Apexium 280 battery box and other battery builds have been very helpful to me. I just got some MG 847 in the mail, and plan to use it to reduce resistance in the connections. I plan to sand the contacts WITH the MG 847 to prevent any new oxidation from forming immediately after the sanding. I think that should work.

 

[Bananaman321]

When I ordered myself I also ordered myself a battery capacity tester like Ray has the blue one and a million meter for testing the internal resistance of the batteries to match the cells I plan to do some testing on preparing the terminals with a mild hydrofluoric / sulfuric acid blend with a q-tip before applying the bus bars vs 3M scotch-bright pad to see which gives better results.

The simplest method to get the best results is the best IMP

 

[Bananaman321]

This is the test documentation for the cells that I ordered maybe the same as your cells too

 

[timblack1]

I got the slightly more expensive Eve 304Ah cells, expecting their actual capacity would be higher than the 280Ah cells, but

says the 280Ah (version 3, 8000 cycle life, actual capacity 315-316Ah) is actually better than the 304Ah (version #?, 6000 cycle life, actual capacity 316-320Ah). Oh well!

 

[Bananaman321]

I got the slightly more expensive Eve 304Ah cells, expecting their actual capacity would be higher than the 280Ah cells, but

says the 280Ah (version 3, 8000 cycle life, actual capacity 315-316Ah) is actually better than the 304Ah (version #?, 6000 cycle life, actual capacity 316-320Ah). Oh well!

They're all good cells I think it's more of how you use them and abuse them temperatures witch you store them at.

long term storage 30-40% SOC recommended
avoid regular deep discharges
avoid below freezing operation and high temps
and they will most likely calendar age before cycles

 

[timblack1]

I decided to fill the gap with some cardboard.