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    Advise on Lifepo4 48v 30ah-40ah battery pack

    By a small size factor i meant that there is no sense to install big BMS systems like Orion Jr or Elithion, that's where miniBMS were handy. I know charge/discharge can be controlled with charger/controller, and still bms system will be good to have. So i am looking for good 48v 30ah battery...
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    Advise on Lifepo4 48v 30ah-40ah battery pack

    The problem with Tesla cells is how to control charge/discharge with such a small size? For our previous (much bigger packs) we were using miniBMS, but it's discontinued. PMing anyway. Also it's cargo bicycle-scooter thing, not bike - was not clear in OP.
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    Advise on Lifepo4 48v 30ah-40ah battery pack

    999zip999, you made me thing about it :D now i am inclined to go 20ah-30ah route. It's for cargo kind ebike, i carry loads ;) The motor will be Bafang 1000W Mid Drive Kit.
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    Advise on Lifepo4 48v 30ah-40ah battery pack

    Guys i need a good lifepo4 48v 30ah-40ah battery pack. When i was researching year ago ping was the option to go. Is he still recommended? Any other options you can suggest?
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    Air Circulation for Battery Box

    guys, thank you for all the advices. Seems like i don't need to worry about it. Measured with clamp meter - it's 100amp continuous nous, and the 'rides' are pretty short. Will test for couple of days, but for know seems like couple of holes for ventilation will be enough. By the way what...
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    Air Circulation for Battery Box

    Guys, i am planning to use aluminium battery box for 8 100ah calbs cells. The box will contain cells with installed MiniBMS cell modules. In terms of safety, what kind of air circulation is needed? Do this batteries become hot under usage? And is it required/recommended to have some kind of...
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    Using Load Tester

    Didn't though of that. How about using it for individual cells? Or what device should be used to imitate 100amp-150amp load? That's actually what i am looking for. Peak current(on acceleration) is about 150amp, after that it's much less. I want to see what levels are reached under peak load to...
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    Using Load Tester

    Need to test pack behavior under load. The pack is rated 24v (8s). Can i use this load tester and additional volt meter? The load tester is for 12v batteries, but i once can use it for all voltage pack, just should have external voltmeter(cause load tester won't show voltages higher than...
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    Charger for 8s lifepo4 pack

    Seems like they not very reliable: https://endless-sphere.com/forums/viewtopic.php?f=5&t=49401 https://endless-sphere.com/forums/viewtopic.php?f=14&t=38284 Thanks for suggestion though!
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    Charger for 8s lifepo4 pack

    so you don't buy the 'slightly undercharge = longer battery life'?
  11. L

    Charger for 8s lifepo4 pack

    Need charger to charge 24v 100ah calb cells pack. I will use the pack with BMS where shunting starts at 3.5v/cell. So i would like to charge to about 3.55v/cell leaving some time for shunting/balancing and at the same time not reaching 3.65v/cell which is default for most lifepo4 24v/8s...
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    Bestechpower BMS

    Just've read all the thread. Would these BMS work for high ah cells? Like 100ah calb cells? The biggest complain for Bestechpower BMS as i see so far is low balancing current. The highest they have are 144ma for D131 and D138, and 218ma for D170. Will it be enough to balance 100ah cell?
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    8s LiFePO4 BMS recommendation

    Guys, please recommend reliable BMS for 8 x 100ah calb cells pack . Continuous current 30amp, peak 60amp to be used with 24v 50amp brush motor. I've read lots of positives for bestechpower, is that the best way to go? Also are there BMS with screw terminals? so soldering is not required. It's...
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    Disassembled Nissan Leaf battery - reeks of acetone...

    What 'EVTV event' are you talking about. Could you please explain to newbie. :?:
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    Next best LiFePO4 cells after A123 and Headway

    dogman dan thank you for your reply, NMC is the chemistry they use on Chevy Volt and Nissan Leaf modules, right? It's one of the options i am considering. What you think about CALB cells? I've read people rate them better than A123(or chinese A123) on diy electric car forum
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    Next best LiFePO4 cells after A123 and Headway

    hm, that's the first time i hear about Sony US18650V3. So it's Li-Ion and it's safer than LiFePO4? And where i can buy them? I guest Europe in not the source the coming from? It's reseller, right? Just checked aliexpress: 224 cells will be about $950 including shipping to USA. p.s. imagine it...
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    My 4s2p A123 Amp20 Battery Build

    Any update on the pack? How is performance so far?
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    20S A123 AMP20 Battery Build

    How much did you pay for the cells and the shipping?
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    Next best LiFePO4 cells after A123 and Headway

    USA, NJ
  20. L

    Next best LiFePO4 cells after A123 and Headway

    dogman dan - it's for cargo bikes. "You could cut the weight and volume by more than 30% by choosing a magnesium chemistry" - yes, and what about the best $ spent / # of cycles. It's first time i hear about magnesium chemistry - could you suggest the seller so i can check the prices? Also what...
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    Next best LiFePO4 cells after A123 and Headway

    Continuous current = 30A, peak current = 60A. Yeah, A123 would be good. But they don't manufacture them anymore. All cells sold now are from old stocks/or returned/not passed quality test, right? Also a bit expensive for me. weight - any, size- any, lifecycle - best ratio of $ spent to...
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    Next best LiFePO4 cells after A123 and Headway

    Guys, what is next best LiFePO4 cells for DIY battery pack after A123 and Headway? I need 24v 75ah to 100ah battery. Continuous current = 30A, peak current = 60A. A123 and Headway are out of my budget. What are the next best/cheaper options out there?
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    BMS for separate Chevy Volt Module

    I planning to rewire Cherry Volt 48v 45ah module into 24v 90ah. Module consists of 12 cell groups (each cell group have 3 LG Chem LiCoO2 pouch cells.), so by connecting cells groups 2p 6s i should get 24v 90ah module. What kind of BMS will i need for this? The set-up i use has continuous...
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    Lead Acid to Lithium

    thx dmwahl, continuous current is 30A. peak current is 60A. I am asking for BMS for this: So i can calculate the cost of that option.
  25. L

    Lead Acid to Lithium

    Guys, thank you for all the inputs. Don't have time/equipment to test exact watt usage per dogman dan suggestion, so let's assume it's 24v 75-100ah range. After digging ES(arkmundi's post was very helpful) and other sources come to that options: 1. DIY Lifepo4 pack made from A123, Headway...
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