Xuba 12v 280ah build

[vtx1029]

My cells and bms took the same time to get to me about 2 months total. Cells all were packed well and arrived with no issues. I ordered double buss bars for my build.
First top charged all the cells. The pack took 56 ah to go from 3.35v to 3.6.

I then connected in series, taped them up and packed everything in a group 27 battery box I had.

 

[Haugen]

That looks exactly like the battery box that came with my camper.
I was wondering if my lithium set up would fit, or if I would need to build my own mounting system.

 

[ghostwriter66]

My cells and bms took the same time to get to me about 2 months total. Cells all were packed well and arrived with no issues. I ordered double buss bars for my build.
First top charged all the cells. The pack took 56 ah to go from 3.35v to 3.6.

I then connected in series, taped them up and packed everything in a group 27 battery box I had.

Just remember that the #1 destroyer of batteries is HEAT ... LiFePO4 does not like to hold heat and thats why most of the better LiFePO4 batteries are aluminum cased ... You seem to have wrapped your batteries up snugly so not sure how much C you are going to push into and out of them -- but for a few days/weeks just keep an eye on them and make sure they are not getting hot ... Here in South Texas it was 104 today so when we build battery packs we put spacers between each battery and nothing around the side of it except strapping wire or cable or tape ... NOT saying that your wrong - just saying if your in South Texas you would not be right ...

 

[vtx1029]

Just remember that the #1 destroyer of batteries is HEAT ... LiFePO4 does not like to hold heat and thats why most of the better LiFePO4 batteries are aluminum cased ... You seem to have wrapped your batteries up snugly so not sure how much C you are going to push into and out of them -- but for a few days/weeks just keep an eye on them and make sure they are not getting hot ... Here in South Texas it was 104 today so when we build battery packs we put spacers between each battery and nothing around the side of it except strapping wire or cable or tape ... NOT saying that your wrong - just saying if your in South Texas you would not be right ...

Thanks for that info. Most of my use will be at room temperature and maybe a max current of 0.75C normal draw will be under 0.1C I'm also from way up north so its usually more so the cold I have to worry about. I will be using it in a high vibration application so that is the reason for packing it so tightly.

What do you recommend for a max discharge temp my BMS can cut off the discharge at whatever I set it to? 45*c too high?

 

[vtx1029]

That looks exactly like the battery box that came with my camper.
I was wondering if my lithium set up would fit, or if I would need to build my own mounting system.

Yep there is plenty of room in that box. I have about a 1/2 to 3/4 piece of foam under the cells as well.

 

[Ryang]

Just remember that the #1 destroyer of batteries is HEAT ... LiFePO4 does not like to hold heat and thats why most of the better LiFePO4 batteries are aluminum cased ... You seem to have wrapped your batteries up snugly so not sure how much C you are going to push into and out of them -- but for a few days/weeks just keep an eye on them and make sure they are not getting hot ... Here in South Texas it was 104 today so when we build battery packs we put spacers between each battery and nothing around the side of it except strapping wire or cable or tape ... NOT saying that your wrong - just saying if your in South Texas you would not be right ...

What do you use as a spacer that’s got good thermal qualities?

 

[ghostwriter66]

What do you use as a spacer that’s got good thermal qualities?

Amazon.com

check the size though .. i can't remember for the LiFePO4 if i get 1/4 or smaller ... but I tape 5 of them on the battery -- four on each corner and one in the middle -- and then strap them together ... BUT again it was 103 degrees today in the shade so heat is very important to us ...