eMark
100 kW
deleted due to interference
When john saw your post he couldn't stand someone having something complimentary to say about my threqd so he had to intervene and let you know his truth. Hopefully i've made his day by deleting my previous posts and letting him take ownership of this thread or maybe fechter will remove the thread from this Battery forum.zeccato said:useful information
Uh - no. He had a comment. That's what forums are for.eMark said:When john saw your post he couldn't stand someone having something complimentary to say about my threqd so he had to intervene and let you know his truth
eMark said:r [/][/b]zeccato said:useful information
Not for the good of all as john61ct's method is far superior to my Blinky posts. Apologize for MY gobbledygook interference posts. john61ct is right-on (as usual), so hopefully he will take ownership of this thread. Evidence of my gobbledygook post(s) was that possibly an administrator "Xed" my second post two days ago, while i was final editing my third post yesterday. Have not had an "X" option since last November so it couldn't have been me that "Xed" my second reply posted two days ago. Still don't have an "X" option to "X" a previous post (only current post) so it couldn't have been me to "X" what was apparently a gobbledygook post. Thus, the reason for deleting my previous Blinkety blink (XZQ?%@&) posts.zeccato said:I prefer that you put the info back,
for the good of all.
Finally, a smart P-group equalizing BMS thanks to Ali at a reasonable price (page translation feature) ...john61ct said:I personally would prefer a balancer that did not impose any changing to my normal charging routine.
Periodic maintenance routine, not hooked up while in use nor run every cycle, only when needed.
That could balance at any voltage / SoC level. My first choice being at the midpoint if a protective BMS with per-cell LVC is in place during use, otherwise bottom balancing.
A higher balancing rate better than a slower one, for medium cells (60+Ah) 2A for 150+Ah say 5A. That rate ideally independent of the imbalance delta's.
Rather than linking to an eBay auction that will likely expire, here's some description text should make this one easy to find.
What d'yall think?
______
Active, efficient, energy transfer balance
Support 2S to 24S battery packs;
Single cell voltage collection range: 1V ~ 5V, accuracy: ± 3mV;
Support all pool types such as : Li-ion, Lipo, Lifepo4, LTO, super capacitors and other batteries
The balance current is set independently in the range of 0.1~2A, independent of the cell voltage difference;
Support balanced cascading to apply to more than 24S of battery packs, in theory, can be cascaded indefinitely; for exsampel , can 28S , 32S , 36S , 40S ... and so on
Support Bluetooth communication, equipped with mobile APP, real-time view of battery status;
Equilibrium line resistance detection, abnormal contact failure is found in advance;
Power supply range: 40V~ 100V;
Low voltage shutdown function to prevent battery damage;
https://www.google.com/search?q=%22Support+balanced+cascading+to+apply+to+more+than+24S+of+battery+packs%2C+in+theory%2C+can+be+cascaded+indefinitely%22
I love the programmable nature of this 2amp cell active balancer. The app is hard to find but it's name is enjpower. Their website is the same name and I asked them for the app which thankfully they provided a link.
It really does shuttle 2amps between high and low cells. Bluetooth on the mobile device needs to be on then the app has to be opened. From there the balancer will be seen. For the first time connection the password is 1234. Everytime the app connects to the balancer it will beep 3 times, which is convenient to know the unit is fully operational.
Initially I thought the board wasn't balancing but cycling power to the power wire (furthest from the red led) allowed it to work properly. It is quickly balancing all 16 cells in my lifepo4 5.1kwh solar bank! After 4 days the voltage difference was 2millivolts! This is amazing however since my solar bank is always being charged and discharged, the cells will tend to drift apart electrically hence the need for this balancer.
Another awesome characteristic is the balancer's ability to measure cell internal resistance. As the cell ages the resistance goes up. Really good way to know the health of my cells!
I do not use BMS boards because they are practically useless since I do not overvolt nor undervolt my lifepo4 battery. I use a din miniature circuit breaker as overcurrent protection.
Highly recommended although I wished the price was lower. I intend to buy another soon.
Wasn't all that useful. Hope you find john61ct's excellent post, my two followup posts and docware's thread more useful :thumb: :thumb: :thumb:zeccato said:A little disappointed that you took away useful information
KeepItSimple is a worthy goal and a smart BMS is the way to go. If only they weren't so pricey. If you're going to integrate a BMS get a good one assuming you're bluetooth app savvy. Maybe this one ... http://www.litrade.de/shop/BMS,Balancer/BMS,Systeme/BMS,16S,PMOS,V,3,0,inkl,Software,und,Datenkabel.html ... the new 1.1 specs are just what you've got in mind. Do your due diligence before whatever smart BMS you buy, which you're doing :thumb:zeccato said:I was thinking smart bms,
but I want to have as few things as possible, and simpler.
To maintain your future battery for extending cycle life longevity with the right cells ... for the right application.zeccato said:I have a balance charger, and I also need it to build my future battery.
eMark said:KeepItSimple is a worthy goal and a smart BMS is the way to go. If only they weren't so pricey. If you're going to integrate a BMS get a good one assuming you're bluetooth app savvy. Maybe this one ... http://www.litrade.de/shop/BMS,Balancer/BMS,Systeme/BMS,16S,PMOS,V,3,0,inkl,Software,und,Datenkabel.html ... the new 1.1 specs are just what you've got in mind. Do your due diligence before whatever smart BMS you buy, which you're doing :thumb:zeccato said:I was thinking smart bms,
but I want to have as few things as possible, and simpler.
To maintain your future battery for extending cycle life longevity with the right cells ... for the right application.zeccato said:I have a balance charger, and I also need it to build my future battery.
It's not easy to KeepItSimple with advancing technology everywhere, everywhere. It's getting so one can barely change a headlamp bulb on your car without having to take it to the dealer. A smart bluetooth BMS is the way to go, but pricey. Would be nice if it had at least a 5,000 km warranty. Technology is great, but i don't mind getting my hands dirty if i can save some money.
What is a "what if" scenario where you believe a HV alarm is more important for your use than a LV alarm? Most decent chargers can be set to your preferred cut-off voltage, such as 4.1 volts instead of 4.2 volts. A reliable CCCV charger is by far more important than a cheap/inexpensive BMS that is really a BPS ... if it is even trustworthy? Thankfully, you've already come to that conclusion. Thus, one reason for using a duo 2S~6S balance charger for bottom, middle, top or all three and cut-off set for one hour or whatever (if you aren't around or fall asleep), and set P-group capacity limit cut-off. Then stay close to keep an eye on the remaining balance charge, especially top balancing the P-groups, when enuf is enuf.zeccato said:I was just looking for a simple non-BT monitor HV alarm with warning beeper like the cellog.
That's why my 10S5P pack has to be split/disconnected into two 5S5P packs for true active balance charging (e.g. HTRC duo 2S~6S Balance Charger) with dual ports for the two 5S P-group balance leads and with dual banana plug ports for balance charging each split 5S5P pack (using either deans or XT60 connections). When using either a Chargery 2S~12S dual Monitor (no dual banana plug ports) or 2S~16S dual Monitor (no dual banana plug ports) you still may need to make provision for splitting the pack whether "charging" or "discharging" ... is that correct?john61ct said:Disconnect at the serial midpoint before charging each half.
Few hobby chargers' outputs are isolated.
There are some 10S chargers still even 12S but higher than that is very rare, going modular with 6S units really opens up lots of less expensive options, 8S also bit less so.
eMark said:What is a "what if" scenario where you believe a HV alarm is more important for your use than a LV alarm?zeccato said:
Sounds like you previously got burned and now may be overly concerned. Get a decent adjustable bulk charger so you can charge to 4.1V if that's your plan. You may only need to use your balance charger once a month with a new DIY 12S pack. Then when you do use your balance charger keep a close eye and don't stray too far away so it doesn't overcharge.zeccato said:It was better if there was a buzzer HV alarm,
but I don't find any.
Being that john61ct knows about everything there is to know he'd be the one to recommend a HV alarm/buzzer (if one even exists) that can be preset to say 4.1V when balance charging to 4.1V. Maybe a programmable HV alarm/buzzer function exists out there on some balance charger. If a stand alone programmable HV alarm does exist for LiPo/LiHV/LiFe/Lilon 2S~6S (or 2S~8S) similar in size/looks and price as a 8S cell-logger LV alarm or as an extra function on a balance charger john61ct would know.john61ct said:Disconnect at the serial midpoint before charging each half.
Alarm or HVC - means cutoff - is just in case that fails so keeps charging, cutoff charger source is best.
eMark said:Being that john61ct knows about everything there is to know he'd be the one to recommend a HV alarm/buzzer (if one even exists) that can be preset to say 4.1V when balance charging to 4.1V. Maybe a programmable HV alarm/buzzer function exists out there on some balance charger. If a stand alone programmable HV alarm does exist for LiPo/LiHV/LiFe/Lilon 2S~6S (or 2S~8S) similar in size/looks and price as a 8S cell-logger LV alarm or as an extra function on a balance charger john61ct would know.
Agreed. Relying on a BMS (or a buzzer) to stop a charge or a discharge is a bad, bad idea. Lithium ion batteries can go up in flames quite easily; have at least two methods of preventing overcharge and overdischarge (like a working BMS and a voltage limited charger.)john61ct said:Better to get a charger that will stop automatically.
If you are referring to balance charger is ok,john61ct said:Better to get a charger that will stop automatically.
Alarm or HVC - means cutoff - is just in case that fails so keeps charging, cutoff charger source is best.................
At the top of that 2013 thread he mentions using the "Cell log8s" as a comparison for alarm overcharge function. He's referring to the CellLog 8S - Cell Monitor & Logger ... https://www.nexusmodels.co.uk/celllog-8s-cell-monitor-logger.htmlzeccato said:I have also an old battery (8 years) 16s 30Ah lifepo4
and when I don't want to balance it,
I charge it (without bms) at 95%.,
for when I make a quick charge,
for this for more security I'm looking for a HV alarm 8s or 16s, NOT a HVC. not Bms.
I found this 16s, but I don't know if it's good, see:
https://endless-sphere.com/forums/viewtopic.php?f=14&t=55601&p=831520&hilit=BM16LP#p831520
Whether balancing type or not, it is not "a charger" if requires a human to terminate charge.zeccato said:If you are referring to balance charger is ok, but I already have it.