Excellent idea. Thank you very much, and thanks for the picture as well!If you'd like to use a single 4S BMS, you could configure your 8 cells as a single 12v battery.
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That diagram will also produce a 12v battery (appears mislabeled).How is that different than this diagram from Will that is a 24V system?
More connecting material = more better.but Will's has two bus bars on each series
8 cells in series. One 8s BMS is all you need.make a 24v 200AH battery. How would I do that with a minimal number of BMSs?
Also on that page, with images and descriptions entangled, are mentions of 24v and 48v BMS systems... (attached is what the OP should use from that page)It looks like the image came from this page:
https://www.mobile-solarpower.com/design-your-own-12v-lifepo4-system.html
On that page will is talking about 12V systems.
I thought the OP was building for 12V...??? In the first post he said: "I am building two 4 cell 12v 100aH batteries which i plan to then put in parallel for a total of 12v 200aH"Also on that page, with images and descriptions entangled, are mentions of 24v and 48v BMS systems... (attached is what the OP should use from that page)
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think that i may be a little slow. I am building two 4 cell 12v 100aH batteries which i plan to then put in parallel for a total of 12v 200aH. do i need two BMS's (one for each battery) or can i use one BMS to monitor the entire battery bank?
I am trying to learn enough to buy two of these:
LiFePO4 12 200Ah Batteries
and make a 24v 200AH battery. How would I do that with a minimal number of BMSs?
Got it..... we were going back and forth on voltage and I lost track.It the last bit of post #4, the OP switches to 24v. (not criticizing)
I am trying to learn enough to buy two of these:
LiFePO4 12 200Ah Batteries
and make a 24v 200AH battery. How would I do that with a minimal number of BMSs?
This helps a ton. That is the page I got it from. I had read from the top of the page from 12v then down through the 48v builds. I was having a hard time figuring out how the cells would get to 24v from the diagram at the bottom that I shared previous. Reading again I see that it is referring back to using smaller cells to create a larger battery to the size of a 12v.It looks like the image came from this page:
https://www.mobile-solarpower.com/design-your-own-12v-lifepo4-system.html
On that page will is talking about 12V systems.
You are correct, I think I inadvertently hijack the OP's thread. Sorry.I thought the OP was building for 12V...??? In the first post he said: "I am building two 4 cell 12v 100aH batteries which i plan to then put in parallel for a total of 12v 200aH"
@FilterGuy Thank you very much! The diagrams are exactly what I needed to help me understand.OK.... , the best way to make a 200AH 24 Volt battery it is to start with 200AH cells and arrange them like this:
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In the original post, 100Ah cells were mentioned. To minimize the number of BMSs on a 24V bank you would wire 100Ah cells like this:
Note: This is Parallel-first and is my preferred way to do it if I am ganging up smaller cells to get higher Ah.
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Other folks on the forum believe series-first is better, but it requires 2 BMSs. Using 100Ah cells, parallel-first would look like this:
View attachment 6887
- All 3 of these arrangements end up with 24V 200aH.
- In all 3 arrangements the BMS(s) are 8S BMSs,
- In the 8S2P arrangement the two BMSs can be half the current of the BMSs of the other two arrangements.