Dan-O's DIY 105ah LiFePO4 cell holder springy contraption things!

Stitzebr1

New Member
Joined
Mar 11, 2021
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5
Very nice engineering, has anyone tried use shipping straps?
you know the nylon woven straps you’ll see on some heavy items in cardboard boxes they don’t want to break open. I have access to a strapping machine at work and I’m going to try it out on my 280ah when they arrive and post.
They just seem a little cleaner look with a lot of tension ability.
 

Gazoo

Dumb Dumb
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May 12, 2020
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2,810
Location
Texas
Very nice engineering, has anyone tried use shipping straps?
you know the nylon woven straps you’ll see on some heavy items in cardboard boxes they don’t want to break open. I have access to a strapping machine at work and I’m going to try it out on my 280ah when they arrive and post.
They just seem a little cleaner look with a lot of tension ability.
Just be careful you don't put so much tension the cells get crushed. You could put something on the corners of the cells to prevent that from happening. But really threaded rods and plywood makes for a cheap effective fixture and you have control over the amount of torque applied to the cells whether or not springs are used.
 

Stitzebr1

New Member
Joined
Mar 11, 2021
Messages
5
Just be careful you don't put so much tension the cells get crushed. You could put something on the corners of the cells to prevent that from happening. But really threaded rods and plywood makes for a cheap effective fixture and you have control over the amount of torque applied to the cells whether or not springs are used.
My problem is my motorhome is a 22 foot and they used every square foot in it and with only two outside storage spaces, I had to use the smaller of the two which is only 13" high and I can't use the original battery shelf because it in exposed and under the stairs.
So I have to be as space conscious as possible.
you could call it a ultra mini winnie.
 

Bob B

Photon Sorcerer
Joined
Sep 21, 2019
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3,748
Very nice engineering, has anyone tried use shipping straps?
you know the nylon woven straps you’ll see on some heavy items in cardboard boxes they don’t want to break open. I have access to a strapping machine at work and I’m going to try it out on my 280ah when they arrive and post.
They just seem a little cleaner look with a lot of tension ability.
I tried using a couple different kinds of ratchet strapping when I first assembled my pack ..... what I found was that the strapping stretches over time. Also, unlike spring tension, the pressure on the pack could vary significantly with SOC.
 

Campin

Solar Enthusiast
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Oct 28, 2020
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68
I’m toying with the idea of 1/8” aluminum that may act as a heat sink too.
 

OnTheRoadAgain

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Feb 22, 2021
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643
3 months later and this is still amazing work.

I would say I am going to duplicate this....but I'm not sure I have the required skills to pull it off.

I wonder what kind of wood working equipment he has?
 
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kpw

New Member
Joined
May 7, 2021
Messages
43
Thanks guys! Fun little project!

Got the braided copper from Ebay.

We smashed the copper pipe some first and then put in the braid. Final smash from there! After that, I cleaned up the ends with a sanding disk and sanded everything flat using 120-220-400 grit paper on a flat table.
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nice Job! where did you get the springs?
 
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