16s bms

[OffGrid]

I'm looking for a good 16s bms for a 560 ah 48 volt build for a friend. What is the best option for a bms that doesn't need to be monitored everyday ? I'm using the new a grade Eve cells . Thanks.

 

[OffGrid]

I forgot to mention it needs to have 200 amp discharge . I'm open to using 2 bms as well

 

[Johannlog]

Checkout the Chargery BMS options

 

[OffGrid]

Checkout the Chargery BMS options

I've heard a lot of bad stuff about them are they not a little difficult to get working good ?

 

[OffGridInTheCity]

I've purchased about 8 chargerys - 5 at 8s and 3 at 16s. When they work, I like them because they have an independent monitor screen, simple power on/off button and you must use an external relay with a 12v coil - so you can pick the contactor size. However, I've had several failures - 2 of the just 'burned up' (you could see blown component/burn-smudge when I took it apart) and 1 just shorted out as the temp probe grazed a cell (you have to be careful) and shunt issues can drive you crazy if you care about the shunt metrics.

For high end, I run Batrium - I have 2 of them. The home powerwall has 84 packs @ 260ah each. The trailer has 48v@260a battery because the units are made for rough/tumble. The Watchmon-Core + longmons can handle 560ah cells - so you'd only need 16 longmons or the new Cellmate K9 is lessor amps but should work OK. As in Chargery - you need external Shunt-Trip. But before gong on about Batrium - its at least $1000. https://www.batrium.com/collections/kits

Here's what Batrium looks like. This is the 84pack view - each blue line is a longmon on a pack:


Here's the trailer one - 14s

 

[Ai4px]

Chargery BMS, but do NOT use their DCC contactors. Instead get a gigavac GV241FAX and a 10ohm 10watt resistor for precharge. Get the chargery DELAY BOARD too. you'll be all setup. Also, the separate CHG and DISCHG ports on the Chargery BMS can be combined to one using this SSR board https://www.ebay.com/itm/322209858572

 

[Steve_S]

Delay Board info Page 49
Opto-Coupler stuff Page 56

 

[Ai4px]

Also, Chargery BMS does have a moderate jumpy voltage reading, but it's "good enough". I smoked one when I broke the battery pack in 1/2 so I didn't have to worry about sparks if a wrench slipped. When my wrench did slip, it completed the circuit the "other way around" and smoked the balance transistor between cells 8 & 9 by applying 50v where there should have been 3.2v. The solution is to simply pull all the balance wires off if you disconnect the pack in the middle for servicing.
My intent with the chargery was to run a couple of RJ9 extension cables from the basement to the kitchen and have three displays in the house for the three packs, but I've decided to create an ethernet to rs232 solution so the raspberry pi can be used to monitor the packs.

Again, AVOID their DCC.... but the BMS is pretty good.

 

[OffGridInTheCity]

Chargery BMS, but do NOT use their DCC contactors. Instead get a gigavac GV241FAX and a 10ohm 10watt resistor for precharge. Get the chargery DELAY BOARD too. you'll be all setup. Also, the separate CHG and DISCHG ports on the Chargery BMS can be combined to one using this SSR board https://www.ebay.com/itm/322209858572

I use a Gigivac MX12 (12v coil) with a Chargery 16s and works great - https://evolveelectrics.com/collections/contactors-mx/products/gigavac-mx11. The Chargery + Gigivac have been operating 1.5rs (and counting). I mention Gigivac because they are high quality and you can find other models that go up to very large contactor amps - as high as you're likely to need.

And from earlier post - I found a pic of a Chargery16T Pro that 'smoked' when I turned it on. You can see it was likely a resistor?

 

[Ai4px]

I use a Gigivac MX12 (12v coil) with a Chargery 16s and works great - https://evolveelectrics.com/collections/contactors-mx/products/gigavac-mx11. I mention Gigivac because they are high quality and you can find other models that go up to very large contactor amps - as high as you're likely to need.

And from earlier post - I found a pic of a Chargery16T Pro that 'smoked' when I turned it on. You can see it was likely a resistor?
View attachment 55576

I hadn't thought of using a 12v coil.... If I had thought of it, I would be worried about how much current it pulls until it switched to lower power .... yeah, a few fractions of a second, but still.... I wanted the coil across the whole pack and that ebay SSR relay fills the bill.

 

[Ai4px]

Here’s the top of my battery box prototype.

 

[OffGridInTheCity]

I hadn't thought of using a 12v coil.... If I had thought of it, I would be worried about how much current it pulls until it switched to lower power .... yeah, a few fractions of a second, but still.... I wanted the coil across the whole pack and that ebay SSR relay fills the bill.

I know what you mean. In my case - its a 14s12p (48v) battery for an APC 3000 UPS - which already burns 40watts (or so) just being on and so a bit more for the relay coil is OK for me.

 

[OffGrid]

https://app.alibaba.com/dynamiclink...share_detail&ck=share_detail&shareScene=buyer.
ive also been looking at this bms. Is it any good ? I'm running 100 amp jbd bms on my 24 volt battery

 

[BarkingSpider]

I like the Chargery units, the new 16s is much easier to configure and you can use a Raspberry Pi to get realtime info like this and email/text you when the battery is fully charged.

Code at https://github.com/BarkinSpider/SolarShed

 

[Ai4px]

I like the Chargery units, the new 16s is much easier to configure and you can use a Raspberry Pi to get realtime info like this and email/text you when the battery is fully charged.

Code at https://github.com/BarkinSpider/SolarShed

View attachment 55612

I’m loving that display!

 

[Ai4px]

Just to be sure the newbies know.... these mechanical contactors have an option for an “economizer”. How this works is there are two coils... one pulls a lot of amps and pulls the contactor in. There’s a second coil that draws approx 7ma at 48v to hold the contactor. So when you first apply power the contactor coil draws a fair amount of current but just for a moment then it goes to 7ma. Mine’s been running for weeks and it’s not warm at all. On these 280ah packs, 7ma isn’t going to make any difference at all.

 

[Ai4px]

https://app.alibaba.com/dynamiclink?touchId=1600174920797&type=product&schema=enalibaba://detail?id=1600174920797&ck=share_detail&ck=share_detail&shareScene=buyer.
ive also been looking at this bms. Is it any good ? I'm running 100 amp jbd bms on my 24 volt battery

I’ve been fighting one of those BMS’s for a few weeks. I am at wits end. If you are off grid and will never go more than 18 hours (65000 seconds) without pushing or pulling power out of this BMS, its a fantastic unit. Love it. However in my case, I’m grid tied and my batteries sit idle most of the time so this unit will go to sleep on me. I can’t stop it. I tried setting the sleep time to 0 and 65535 (that is -1) and the unit still goes to sleep. I’ve asked several times on here about this BMS by another name... QUCC and no one seems to know how to stop it from sleeping. It is a JBD by the way. This is killing me because I really really like that unit. Maybe I’ll put it in my golf cart one day.

 

[Aaron Zhou]

我正在为朋友寻找 560 ah 48 伏的优质 16 秒 bms。不需要每天监控的 bms 的最佳选择是什么？我正在使用新的a级夏娃细胞。谢谢。

You can check out Seplos' 16S BMS,i think it not make you disappoint.

 

[Aaron Zhou]

If you have the intention, you can contact me directly,we also have 48V 16S 200A BMS

 

[houseofancients]

You can check out Seplos' 16S BMS,i think it not make you disappoint.

i confirm this is a very nice bms, plus it is stackable for multiple batterybank, and talks the pylontech protocol, and thus communicates with most inverter directly through canbus