Daly high current question

[chelseawaves]

hey guys, planning to buy 8x EVE cells 280AH and build either :

- 1 battery, with 4 groups of 2 cells in parallel , and then mount those 4 packs in series to get a 12v 560Ah

or

- 2 batteries, 4s 12v 280Ah, and then parallel those 2 into a 12v 560Ah

for option 1# i'd go with a single BMS ~300A , monitoring only the '' 4 parallel packs'' , so that wouldn't be monitoring every cells

for option #2 i'd go for 1 BMS per battery pack ( ~ 150-200A per BMS ) , monitoring every single cells.

what would be the best option? and is this BMS a good pick? https://www.aliexpress.com/item/32921440657.html?spm=2114.12010612.8148356.4.76a330856w0LSg

i looked into the Chargery BMS but i am quite new in this world and with the DCC and relays and everything it looks a bit too overwhelming for me, i wanna keep things as simple as possible to minimize fuck ups, thanks!

 

[chelseawaves]

nevermind, just realised this BMS is for 3.7v cells, not 3.2!

any recommendation for a good 3.2v BMS ~ 150A or a 300A ? other than chargery?

 

[jvbutter01]

there is defiantly a ton of options... its worse than amazon...

250a bms - Buy 250a bms with free shipping on AliExpress

Quality 250a bms with free worldwide shipping on AliExpress

www.aliexpress.com

the problem Will P. has with Daly is no working temp sensor. be careful if that is a requirement.

 

[Schovie]

er is zeker een heleboel opties ... het is erger dan amazon ...
[URL unfurl = "true"] https://www.aliexpress.com/popular/250a-bms.html [/ URL]
het probleem dat Will P. heeft met Daly is geen werkende temperatuursensor. wees voorzichtig als dat een vereiste is.

De nieuwe Daly smart die ik zelf bij Daly heb gekocht, heeft een werkende temperatuursensor.

 

[backwash]

if it's any help; I went with 2 separate 12v batteries each with their own 200a daly BMS on my 5th wheel (3kw inverter). by effectively splitting the load across the two batteries it derates the daly BMS by about 2 as I didn't feel comfortable with the cabling on the BMS. each battery has it's own ICDT bat monitor for viewing the individual cell voltages.

 

[Dzl]

nevermind, just realised this BMS is for 3.7v cells, not 3.2!

any recommendation for a good 3.2v BMS ~ 150A or a 300A ? other than chargery?

That is a daly BMS they are available for both 3.2V LFP and 3.7V Li-ion

Here is the proper link to the LFP variation

 

[chelseawaves]

thanks guys! hopefully i'll find the perfect one by the time i'md ready to build! i do need low temp protection even tho i'll have it with victron mppt, but i do like having it straight on the BMS, i live in canada and this is not optional

 

[Samsonite801]

I wound up buying the Overkill 120a BMS's for my 12v RV system, because Will has tested this brand and confirms the low temp cutoff ACTUALLY WORKS. They also can charge at 120a as well, unlike some others where they can't charge at same rate as the discharge rating.

4s BMS 120a LifePo4 with M6 Threaded Terminals

Comes with M6 Threaded Terminals soldered to the board as shown. BMS For 4 cell, 12v volt Lithium-iron-phosphate DIY batteries 120 amp continuous charge or discharge current Low Temperature Chargin…

overkillsolar.com

So I bought 2 of them and will just build 4s2p, to get 240a continuous... I already got them in the mail but still waiting on the 8x 280ah cells, aluminum plates, and heat pads, to come, so I haven't had a chance to try them yet...

 

[Samsonite801]

The above is for my 12v RV system where I am going with the OverKill 120a, but I also purchased 2 other BMS for my off-grid house project for my 48v banks of 32x 280ah cells, and I used these ones (as they came with my Treeline bank):

116.4US $ |7S 8S 13S 14S 16S 20S 24S li ion or Lifepo4 Battery PCB board with 120A 200A constant current for auto car 48V 72V Battery|Integrated Circuits| - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

I have almost all the parts to assemble this bank now, except still waiting on the aluminum plates, and heat pads, to come, so I haven't put it together yet either. This BMS does not support low temp cutoff, however, I got a Victron charge controller with remote battery monitor and temp sensor to cut off this set. I will run these as 2x BMS, and building 32 cells 16s2p... Unlike the OverKill which have related phone app and management, the ladder one discussing here for my 48v system does not have any BMS management functions... They are manufactured by Bellhope Technology Co... They look really beefy and well built but no management.

 

[jvbutter01]

That is a daly BMS they are available for both 3.2V LFP and 3.7V Li-ion

Here is the proper link to the LFP variation

BMS looks good, except I don't think it offers Low temp shutoff...



bummer it has high amp version

 

[Zach]

This one claims to have low temp shutoff:

47.42US $ 24% OFF|Solar Daly Smart Bms 4s Lifepo4 16s 12v 24v 36v 48v 60v 72v 80a 100a 100ah 3s 7s 8s 10s 12s 13s 14s 20s 24s Can Bus Bms Board - Battery Accessories & Charger Accessories - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

 

[Schovie]

My Daly smart BMS has low temperature protection. I have tested it and it works

 

[chelseawaves]

thanks!

 

[drwormy]

I have a 60A Daly Smart BMS. Temp cutoffs also work.