So why buy an additional balancer if active balancing is part of bms? This turned into waste of time
- Thread starter D71
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The mpp solar 3048 has an equalizer feature built into according to documentation Warning the online documentation might not be same as inside and what comes with the product. So according to mpp solar it desulfates which is not a property of lifepo batteries to my knowledge.
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Ampster
Renewable Energy Hobbyist
That is why I use a 2 Amp active balancer and disable balancing on my BMS. In my case, my Orion JR2 BMS is actually very good at Coulomb counting and interfaces well with my Inverter. It just does not have the power to balance my grade B cells which constantly drift. Plus, it is a resistor bleed balancer which would take even longer if only one cell was low.
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The Ultimate Guide of LiFePO4 Battery - Sunon Battery
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sunonbattery.com
sorry for some reason it quoted you
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sunshine_eggo
Happy Breffast!
Ah... I get it now. YOU thought I was insulting YOUR reading comprehension. I meant that in the general sense. You are probably soured on me from me finding you incoherent, so you take anything that might be taken as an insult - an insult - even when it's not.
Given how well you dish it out, you really seem to be overly sensitive.
It helps to understand the terminology.
"Equalization" is a specific process for flooded lead acid batteries designed to recover capacity, burn off sulfation and increase cell specific gravity. It has absolutely nothing to do with LFP batteries.
An "Equalizer" is a completely different product that equalizes the voltage of the relevant elements by shifting charge from high voltage elements to lower voltage elements.
A consumer has some responsibility for their own education. I have bought several products in error because I mis-read something, missed a detail, or assumed something. Rather than jump up and down with outrage at the advertiser for my own ignorance, I try to find where I went wrong, so I can avoid repeating that mistake in the future. Sometimes I just eat those products as part of the lesson. Sometimes I return them if there's a liberal return policy as "ordered by mistake."
Bob B
Emperor Of Solar
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That mostly looks like market BS .... and I'm not quite sure why a "good" BMS should have GPS. Is it somehow necessary for the battery to know where it is at all times?More advertising
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What is LiFePO4 Battery? MonoBlock LiFePO4 Battery Instead of Lead-Acid Battery? LiFePO4 Battery Compared to Other Lithium-ion Batteries? Applications of LiFePO4 Battery? How to Properly Charge LiFePO4 Battery? What is a Good BMS for LiFePO4 Battery?
sorry for some reason it quoted you
But bob this guy is saying it…. There is good info there… but lot of things depend. If there was a one shoe fits all we would be clones and do everything just alike almost like Robotic AI except different task and different programming and ….. you see where it goes for incoherent…. But applicable for some of it. We would be the same but different.
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Off topic don’t want gps in my bms and don’t like the blue tooth being open in my himassi smart heated bt batteries either…… it should be secured. Most everything smart tied to satellite or internet from china has bothered me for years We already know they hack back door into security cameras purchased from china. Same for smart tvs. We might as well allow them access over our back up supplied bms batteries and track us while at it. They get all the power data built into their programming sent to them for all the ppl using it but that is off topic
Documentation that I’ve read definitely recommend top balance
i doubt my himassi batteries had anything tested arrived 0 percent soc no cycles
Ampster
Renewable Energy Hobbyist
I did a parallel top balance on my 42kWh pack and after assembling it. the active balancer still had some work to do. Therefore, despite the extensive documentation suggesting top balancing is required, I think a case can be made for letting an active balancer to the final balancing if one carefully monitors that process. It may require slowly adjusting up the CV set point or letting the tail current taper longer. It is not something I would recommend for novices.
As much as I cleaned the cell terminals and bus bars and immediately applied NoAlox, my BMS still showed differences in internal resistance between each group of 3 buddy pairs. My pack is 3P16S.
Sample of my batteries getting wild during charging then settling down later. 1 cell is trying to be a prick…. The bms in the himassi will reel it back in given time….. it is not immediate nor fast in this process. I did take samples of this example with 2 different programs but regardless it acts the same with either or for the programs. The one cell reading for the ee-bms app in blue highlight has run up. The vip-bms shows them settled again the apps will show the same results.
I personally don’t want to watch the cell voltages like and ocd complusive …. Basically want my bms to handle it as it appears to be doing for rogue cell.
I personally don’t want to watch the cell voltages like and ocd complusive …. Basically want my bms to handle it as it appears to be doing for rogue cell.
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Agree see my other post edit added above
Do you have anyway to know if it is real power transfer vs bleed voltage drop? Any simple quick way? Lifepo have their normal drop in voltages over time and probably more so with loads and functions of a bms. The more thing the bms is tasked obviously the more it will drain the soc. Right?
How do you monitor your cells? App or computer program? Some ppl say they are using raspberry pi computer to do it.
I keep watching and trying to catch the “active balancing monitor“ - in the bt bms program “ vip-bms app“ as seen in screen shot …. to see it turn on … be interesting to see the bms actively registering a balance in progress. That is why asked, “ How were you measuring your balance progress”. I’m not as dumb as seem sometimes there are reasons for questions to be revealed. ?. I made this post to clear some things up.… though. Who knows maybe it was worth it or maybe not. Depends on the sorted sorter. Thanks.
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oldmaninsaline
New Member
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I can attest to that. I got a couple of 5 amp fly balancers and they do the job like right now. Disclaimer: I only plug them in when the batteries are approaching full charge and then unplug them.
Alkaline
Solar Wizard
What happens if you just leave them connected, have you tried that? I left mine on for over 14 months on my 8s setup, never an issue.
It works for some and not for others. It’s dependent upon your pattern of use. If you use some sort of controller to switch on the balancer above 3.42VPC , it’s pretty much guaranteed to work for most applications and you don’t have to wonder if it works for you or if your pattern changes. It’s a good idea to disable the BMS’s balancer if you augment it with an external balancer, they can conflict.
BarracudaBob
Harvesting free photons from clean fusion
So if I have 4 cheap 12V batteries that I would like to put in series and add to my 48V string Wouldn't this help to keep the 4 packs balanced my packs. Each Pack has it own passive balancer but there is nothing to keep one of the 4 from running away.
I have (4) Eco-Worthy that are looking for a home..
I have (4) Eco-Worthy that are looking for a home..
cs1234
Solar Wizard
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Alkaline
Solar Wizard
Yeah golf cart guys use this on lead acid and it works as long as the batteries are not too far out of balance, when they do it fries the unit because it starts to try to balance 20-30 amps which is too much for it.