How To - Part 2 LifePo4 Battery Build EVE 280AH Cells

[@Boatingtube]

Couple of updates to the video the outer casing is positive charged not negatively charged as I state in the video

[@kimmer6]

I did 8 in a row. They expand/contract almost 1/8 inch when restrained with fiberglass 50m wide mesh tape. I never used these but built a battery box with 250 amp BMS, 70 amp charger, 3000 Watt Renogy inverter. Those stupid 6mm aluminum battery post studs are way under designed. They should have been 8mm with brass posts. I drilled and tapped the bus bars for #8 screws coming from the bottom up for the BMS and battery monitor leads so they won't be under the terminal nuts. I am giving these 280 AH units a try. We'll see what happens. The cells were top balanced and 3 weeks later hold the same voltage. I added active cell balancers that do 5 amps per leg. They work! I am about to finish it up and wake up the BMS unit. I also put in 500 amp fuses on the negative terminals and wired it with 1/0 battery cable and nickel plated lugs.

[@Aconda]

Did you consider add another pair of stainless steel bars under the four cells or move the placing of your lower bars to be tighter together and under the cells. I think that would have made a nice solution. The silicone on your bars would act as a slightly soft shelf for the cells to rest on. Reduce micro vibrations from the boat and engine.

[@realoldgeekster]

Great video. You should put a piece of wood on the bottom as well. If your on a boat and you put the battery down on a rough surface. Like a stray bolt or screw or other piece of metal you could puncture or cause a short. Anyways food for thought. Thanks for posting.

[@landonashby2029]

Another option for insulating between the panels on a budget. Would be flexible cutting mats. They sell them in a 2 pack here at the Dollar Tree. I was thinking to use these and a 1/2" white cutting board for my end pieces. I'm planning on adding a heater to the bottom of my build using a Temperature Contol Module, 12v Hive Heaters and an 1/8" thick Aluminum plate. I think it may be best to place one of those flexible cutting mats between the plate and the bottom of the battery as well. Nicely done on your build by the way.

[@cuisinartOH1]

Cheap plastic cutting mats are what I am going to use on my packs, too.

[@TheGalifrey]

The best solution is Sticky Barley Paper, you can buy it in 175mm by 1m lengths and then cut it into 5 pieces and insulate one side of the contacting batteries. (also known as battery insulation gasket)

[@landonashby2029]

Picked up 2 2-packs of the flexible cutting mats from Dollar Tree -$2.12 Found 1/4" thick cutting boards at Wal-Mart 88 cents each - $1.87 Gonna go with some 2" Electrical Tape off Amazon I can't find it locally. Gonna be about $9 but I have a few color choices. Black, Blue, Red, White, Yellow. What color would you pick? I'm thinking Red or Yellow.

[@domesticappliancerepairltd7265]

Where did you get the batteries. I'm in the UK as well. Not sure who to trust to buy from

[@Boatingtube]

Hi there, they were from Alibaba from a supplier called Shenzhen Xuba, it is a bit daunting sending a large bank transfer to a company of alibaba in china but there were lots of posts on the DIY solar forum that said they were positive👍

[@davidgreen9957]

Nicely done! I think I'll do the same with mine.

[@computeification]

What about the bottom ❔ Bottoms matter 😎

[@Boatingtube]

check out the new part 3 video where I cover bottoms 😱 kzbin.info/www/bejne/Z5uUkmhqpKl9pK8

[@MiniLuv-1984]

That's pretty good. Thanks.

[@DIYwithBatteries]

Cool stuff Sir :D

[@ericlarose5832]

What is the maximum charge current that the battery can take from a charger when I recharge the batteries?

[@PatricksDIY]

I used a torque wrench along with clamps, that way i knew I was the same on both sides

[@thelemoncuttingguy5127]

Hi, That was really enjoyable. Howlong have you had the cells? i really want to buy the lifepo4 but im so sceptical when it comes to aliexpress/alibaba with cells that are costly. But i have seen quite a few ppl using them and i have been eyeing em for some time too.

[@w3bb0y]

Any luck making parts and links list? :)

[@Boatingtube]

sorry for the delay just updated the description now 👍

[@roblundy4203]

Why 2- 6volt packs instead of 2- 12volt packs?If one pack goes bad you have nothing but 1- 6 volt which runs nothing.With 2- 12volt packs you still get 1- 12volt battery.

[@cuisinartOH1]

I was wondering that, too. I bought eight of these Eve 280Ah cells. I am going to make two 12v nominal packs and run them in parallel in my RV. Please let us know why you are two 6 packs in series? Thank you.

[@TheGalifrey]

The cells are parallel first because otherwise you need 2 BMS2-3-4 cells in parallel and then in series means only one BMS needed and the 2-3-4 cells in parallel balance each other.

[@roblundy4203]

@@TheGalifrey If you are boating and you loose a 6 volt battery nothing works.If you have 2 bms and 2 12volt batteries you have the ability to continue with power.BMS are cheap and having 2 gives some peace of mind.Redundency is very important in boating.Good luck with your build.

[@TheGalifrey]

You won't LOSE a 6v battery, it will be setup as one battery but if you are doing a layout, you can either use 8 cells in a row or 2 packs of 4 cells side by side. To lose one "pack" of 4 cells, 2 of the cells in parallel would have to fail as the other parallel will "support" the rest of the pack if one fails. If 2 fail, then you're potentially looking at the same thing, but 2 failed 12v packs. You have to understand the wiring, and this is the correct way to do a LiFePO4 pack.