The Seplos BMS V3.0 Balancing Issue. What is the problem here?

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In today's video we are having a comprehensive look at the #Seplos #BMS V3.0 again and are trying to fix it.
The main problem is, that the balancer does not seem to work well, or maybe not even at all. All three battery packs were delivered with a massive imbalance of almost 0.3V at not even 55V.
I show you the three batteries and BMS and we measure the maximum possible charge voltage and the resulting deviation. INSANE!
I also try to use the 15A NEEEEEEYY to rectify the problem but was unable to even attach it to the battery due to construction design of the case and battery.
The solution was to manually balance one pack with the help of the light bulbs so we could charge it to the Seplos default voltage of 57.6V.
I left the BMS V3.0 balancer running over night at this voltage and was shocked by the results the next morning...
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26 сен 2023

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Комментарии : 160

@typxxilps 10 месяцев назад

There has been a BMS update for that BMS by Seplos as I had commented today. There is a video out from Seplos how to upgrade the V3 bms that is covering the balancing topic as they had said. You might check it out now on the seplos youtube channel . Good luck.

@OffGridGarageAustralia 10 месяцев назад

I commented already on that video. I have tested this now and it will be in the next video tomorrow.

@pragmaticcosmic2826 10 месяцев назад

Andy you need to change your exit slogan to ....stay safe ...stay charged and stay balanced!

@OffGridGarageAustralia 10 месяцев назад

I had this for a while. Don't want to tell people what they should do...😂

@sreekumarUSA 10 месяцев назад

Sep

@9111logic 4 месяца назад

I am really shocked Andy, I never thought a company like Seplos could deliver a battery so poorly balanced, I first purchased an unknown make (Odipie) nevertheless it was perfectly levelled with a delta of less than 5mv, after a few months I built a 304A which I sort of top balanced but not to the very best however, after connecting it to the Seplos 200E, I recorded a max delta of 1 to 3 mv and it has stayed almost invariably in that region since. Thanks for sharing this long and tedious experiment 🙏

@airgead5391 10 месяцев назад

Thanks! YES!!! THE NEEEEEEEEEEEEEEEEEEEEEEEEEYY!! that deserves a bonus!

@OffGridGarageAustralia 10 месяцев назад

I appreciate your support. Thank you very much 🙏

@wayne8113 10 месяцев назад

Thanks Andy

@Jonyys 10 месяцев назад

👍 and waiting next

@laurentsantaibambu7324 10 месяцев назад

Hi Andy, and thank you again for this video and tests,!.. My opinion, it's not just the BMS that's the problem, it also comes from the cells I think?... But obviously with this type of passive balancer, it's impossible to get a good result Except! if! the battery pack has very good cells.

@OffGridGarageAustralia 10 месяцев назад

Cells seem to be fine... I'll show the solution in the next video.

@LarryKapp1 10 месяцев назад

Ah the ongoing saga of Seplos BMS balance . Maybe one day Andy can sleep without all the worry and bad dreams of 200mv deviations .

@OffGridGarageAustralia 10 месяцев назад

It will never end. I'm far too addicted😊

@vp3319 10 месяцев назад

Thank you, you are SMART balancer (lamps)... 😁

@OffGridGarageAustralia 10 месяцев назад

Yep, but very slow balancing😂

@PlexMulti 10 месяцев назад

Ευχαριστούμε!

@OffGridGarageAustralia 10 месяцев назад

Thanks for your ongoing support 🍺

@khalilullahyosufi9379 10 месяцев назад

From the beginning of using these Polo batteries I thought once a time you will appropriate define the batteries and this week it comes.

@HybridShedIraq 10 месяцев назад

I couldn't top balance my Frankie rept and lishen pack unless I manually charged the 3 low voltage cells with power supply WITH VERY LOW CURRENTS then staying for hours at 3.45 and only balancing after 3.45 with jk bms. As cells get larger its pain to balance them I have 2 105ah eve packs more than 2.5 years old and they are still balanced with balancer recently turned on at 120ma now at 55.2 I have 4mv in one 105ah pack and 4mv for the 280ah pack but still have one cell in the other 105 pack at 30mv lower than the rest.

@ElectricCarAustralia 10 месяцев назад

Hi Andy, I hope Seplos have you on their R&D payroll. 😂👍

@OffGridGarageAustralia 10 месяцев назад

That would be great. Or maybe not...🤔

@junkerzn7312 10 месяцев назад

Its going to oscillate a lot with the recovery voltage set at 3.6V instead of 3.4V. Not good. But also not necessarily a problem when multiple batteries are placed in parallel because the individual disconnects won't disconnect the whole set and leave the charge controllers with nothing to push against (which would cause the charge controllers to over-volt for a second each time the battery disconnects... if there were just one battery). I do think the 3.4V over-voltage recovery default is too low but the parameters have to be really tight. Basically using a recovery default that low means that Seplos wants there to be a load or drain on the battery before it allows charging to resume. The real question is whether the balancer can operate for a long enough period under those circumstances. It kinda sounds like the Seplos's balancing restrictions, possibly due to the design of the balancing hardware itself, is creating a problem, and the default settings probably aren't helping. In anycase, I would care too... you don't want the normal operation of a battery pack to constantly be hitting a cell over-volt and disconnecting charging from the pack. That puts stress on multiple system components. In a single-pack system, for example, the disconnect will cause the charge controller to over-volt for a short period and possibly also cause the inverter to alarm.

@OffGridGarageAustralia 10 месяцев назад

The settings are not optimal and may only work under certain circumstances. I'm not sure either whet the exact intension is to set them like this. If you're not familiar with that, it can be really hard to understand and change them to the correct values. Or, you may find the battery performing weird. For sure, the battery should not hit any protection parameters under normal operation. Not even an alarm if set and working correctly.

@zeropointbalance7366 10 месяцев назад

Just an idea for BMS/battery manufacturers: Why not provide clear balancing instructions to their customers if they ever find the battery out of balance? Instructions that even a non-expert could follow? If an expert like Andy cannot balance this battery what chance would the average user have? Example: “If you ever find your LIFEPO4 battery out of balance, Please attach a 14V current limited supply/charger until the battery is balanced. **this may take up to 2 days**.” Please note, the instructions must include an indication of how long since it may test the customer's patience..... If they have to tell their customers “this may take up to 4 years” then they better include a better balancer or fix their balancer before releasing the product. Then, reviewers could actually verify the instructions by inducing an imbalance, and then following the instructions. The battery only gets a pass if it can be balanced **per the instructions**.

@OffGridGarageAustralia 10 месяцев назад

Great advice!

@inmyimage1081 8 месяцев назад

@@OffGridGarageAustraliaActually I disagree, the layman doesn’t understand balancing or how to manage their battery packs outside of monitoring the percentage charge and then simply scratching their heads and shrugging their shoulders if they don’t hit q00% for days. I say this after direct experience and interaction with a few youtubers with both the “solar generator” style batteries as well as the rack style. If a manufacturer includes directions about extra tasks required periodically that requires a completely separate device to resolve which they most likely are going to charge the customer separately, they will quickly get negative reviews from other layman reviewers and their sales will either crater or just never get off the ground at all.

@chuxxsss 10 месяцев назад

Beautiful day down here, but only 21 degrees, mate. I have a large package today, hopefully.

@OffGridGarageAustralia 10 месяцев назад

Hey, concentrate on the video content, not the weather😂

@chuxxsss 10 месяцев назад

@OffGridGarageAustralia Oh Andy, if I did that, you would be bored of talking to me, Obe won. 😆

@Dutch_off_grid_homesteading 7 месяцев назад

Heya, nice test but wen you started with the light bulb's I was thinking this is gone be a long way and so it was. 1,5A balancer is that in total or is that for each channel ?

@cristof48 10 месяцев назад

Hi Andy, I juste upgrade the bms with new version V0.5. It's look like very good, after 45mn the balance delta have jump from 188mv to 165mv . Cell 15 was at 3,65V and bms shutdown. Now cell 15 is at 3,509mv. I will have a look this evening when I will comme back from job. (with SEPLOS POLO set)

@OffGridGarageAustralia 10 месяцев назад

I have seen their video and the send me the new FW last week already. Just not enough time... It'll be in the next video. Very interesting.

@cristof48 10 месяцев назад

after more than 24 hours, with BMS Ver0.5, it's not good. The lower cell is still the lower one with no change.@@OffGridGarageAustralia

@OffGridGarageAustralia 10 месяцев назад

@@cristof48 Testing as well right now. Video is uploading...

@wj646 4 месяца назад

Hello Wher did you get the newest version off software for 3.0 v11 BMS?

@cskeise 10 месяцев назад

💙👊😎

@camielkotte 10 месяцев назад

I have noticed with JK BMS that the measurement of voltage as off by 0.2 volts compared by Victron and voltage meter. So I had to adjust/bias the BMS?! (I reassembled the whole battery. No difference. Still 0.2 volts off) What if Seplos had a similar issue? Did you check if 3.45 V is actually correct?

@simongrace2538 10 месяцев назад

I had to calibrate my JK voltage and current. It says to in the manual

@OffGridGarageAustralia 10 месяцев назад

I'm not going down this rabbit hole. Which voltage is correct and which is not? Once you get one of these reference voltage devices and start measuring, testing and comparing, you won't sleep well any more.

@patrickruiz6764 9 месяцев назад

hello the bms3.0 is ok buscan type A or type b please thank you !

@cooperhunter228 6 месяцев назад

Where did you bought the cells? Mine is bought in Seplos. I asked them about cells report. Henry gave 1000pcs cells report of their cells, where i found all 16s QR CODES of my cells. I was able to charge the battery from the first time to 55.8V, after which I had 2 cell protection. Up to this point, the difference was only 0.017v GFB cells 280AH, the real capacity was between 298-299ah, bonus +1kwh😊

@DanBurgaud 10 месяцев назад

4:25 WOW! Cell OVP at ~54V? THAT is so whacked up indeed. It is similar to a "sports car" that complains of overspeeding at 90kph. 24:00 built in balancer could not cope with 88ma? that is so lame. I'd be calling this BMS "SepLOSER" now. PS. Good Job with this video! Greatly appreciate it.

@OffGridGarageAustralia 10 месяцев назад

Yeah, it does not look good but we now have a solution. I'll show it in the next video.

@DanBurgaud 10 месяцев назад

@@OffGridGarageAustralia As expected of Andy. Keep it up!

@andreas4175 10 месяцев назад

The SOC reset also works for me now but I'm still curious to hear from others whether it's normal that the BMS/battery doesn't stay in idle/standby mode for longer periods of time but seems to oscillate around the 55.2V that I have configured as the CVL. The BMS slightly overcharges, then discharges to 55.1 or so to compensate for that, charges again to 55.2+V - and the game goes on...

@derfreiemensch 10 месяцев назад

There is also a discussion about this on Victron, the charge/discharge loop usually happens with me with 2 packs between 1-3 Ah and never stops. In my opinion, this is due to the 0.4 volts that the MPPT needs in order to continue feeding into the grid.

@andreas4175 10 месяцев назад

@@derfreiemensch Could you maybe post a link to that discussion in the Victron forum here?

@OffGridGarageAustralia 10 месяцев назад

This is simply due to the missing Float setting in the Seplos BMS. Would be easy to implement with a FW update. It also depends if your charge FETs turn off when you hit the 55.2V.

@derfreiemensch 10 месяцев назад

@@OffGridGarageAustralia If I disable the BMS and just run the MP2 and MPPT, the Victron charge cycle goes with float, but I leave it that way as the oscillation with so little Ah does not worry me🤫

@RESTESSMYSTIC 10 месяцев назад

Did you over charge the Bouldercombe Battery?

@HawkarAli 6 месяцев назад

Hi Whats SCP warm error on Seplos BMS 3.0?

@clarencewiles963 10 месяцев назад

Would it tell you more about the battery’s going from 99.9 to 99.8 and that timeframe? Over working them. And putting them at a disadvantage for long term?

@OffGridGarageAustralia 10 месяцев назад

The SOH value is just calculated by the BMS software and does not mean anything. It may or may not be true.

@gwenaelg2957 10 месяцев назад

Coucou un grand merci pour votre travail et vos video , Comment brancher 2 parck batterie de 280ah 48 v en lfp avoir une batteries des deux qui se décharge plus que l'autre un grand merci

@stanislavmlcuch2085 10 месяцев назад

Andy, Seplos offers seperate 2A Active balancer for BMS 3.0. Has Seplos sent it to you?

@OffGridGarageAustralia 10 месяцев назад

No. They said, it cannot be installed in the Polo case and needs to go externally somehow? I didn't quite understand why as I have shown that there is more than enough space inside the box.

@andreas4175 10 месяцев назад

Which software is this now again? Would it also work with the v2 Seplos BMS?

@OffGridGarageAustralia 10 месяцев назад

V2 and V3 use different PC software as well as different Firmware files. It's totally different hardware. All links on my website: off-grid-garage.com/battery-management-systems-bms/

@MrHkg-ge9bl 10 месяцев назад

thats interesting,and if i remember correctly,Jakiper battery with Pace bms got the same issue(not factory balanced), did u test that battery like this seplos too? will pace bms balance jakiper battery as well overtime ?

@OffGridGarageAustralia 10 месяцев назад

Yes, I tested the Jaki and other batteries the same way. The Pace BMS however was able to balance the packs over night, while this V3 BMS does not do anything at all. The problem with these tiny passive balancers is, that you really need to increase the charge voltage to 57V or 3.55V/cell or even higher to make them even work. And then it still takes a long time.

@nunyabusiness9760 10 месяцев назад

Seems to me that a simple solution for (all?) BMS manufacturers is to provide a means of controlling (ie turn ON or OFF) a 3rd party Heltec-style active balancer thru the BMS's parameter settings page. Actual parts count added to the BMS would be very low, a 2-pin header, a single smt transistor and a couple of passive components. The method of automating the AB using a Voltage Detection Controller A30-U1 is better than no automation BUT it is triggered by the overall pack voltage and is blind to the runaway cell voltages. The BMS could control the AB based on cell voltage with virtually no cost (pennies) to the BMS bill of materials. If they didnt want to spend the pennies to add such a feature, they could give the user the option to program the (mostly unused) on-board relay output to perform the Active Balancer ON/OFF.

@OffGridGarageAustralia 10 месяцев назад

Most of these BMS are having two dry contacts (relays) which could be easily utilised for that purpose. I'm asking for such a feature for a long time now...

@PierredeVilliersLife 10 месяцев назад

🎉🎉🎉

@OffGridGarageAustralia 10 месяцев назад

🥈

@PierredeVilliersLife 10 месяцев назад

Just wondering if you did check the internal resistance of these pouch cells?

@OffGridGarageAustralia 10 месяцев назад

@@PierredeVilliersLife No, I didn't. Half of the terminals are inaccessible for my tester.

@zeropointbalance7366 10 месяцев назад

Hi Andy, Interesting results. I sounds like you manually balanced (light bulbs) before letting it run overnight? What I found is that long term balancing, the current from power supply will settle to the “actual” balance current + BMS current for a passive balancer. (less for active) I have verified this many different ways… Looks like you settled to 20mA. **if** the BMS actually uses 20mA (my Daly’s use 6-12mA, so 20mA may be reasonable) then that means your balancer is somehow not running/operating….. Ouch. Any chance this BMS has one of those cursed ‘charge balance’ settings that cannot be turned off? (paging Daly…..) As you found, the BMS is unable to measure low currents (makes them 0) and this may be turning off the balancer. Do you think if you let it run for another day (24 hours) the deviation would go down? If it does not, the balancer is non functional at low currents due to some reason. In this case, **if** the balancer were running **and** actually 180mA, the current on your supply should drop to 180mA (plus BMS current) **not** 20mA. **if** the balancer is similar to the lower end Jiabada or Daly BMS, the balance current is actually pulsed. (1/5 duty cycle). So with the 20 Ohm, the **actual** net current would be around 180/5 = 36mA. (note: you will need a current probe and oscilloscope to see this in action. Using current meter can confuse the issue.) I would love to see an oscilloscope on your balance cables to verify. If Seplos claims 180mA balance current, you should settle to 180mA (give or take) until balanced. Why did it settle to 20mA. Seplos, please explain?

@MrHkg-ge9bl 10 месяцев назад

i see your point,i would like to see Andy do the test again in this way too

@OffGridGarageAustralia 10 месяцев назад

I have tested this BMS and balancer twice now with the same result. I cannot measure any balance current and the balance results are next to zero. It seems indeed not working at all. More details will be in the next video.

@davidpenfold 10 месяцев назад

It seems to me that if cell voltages are drifting even at tiny current charges and after a manual top balance, there's got to be something wrong with the cells or their chemistry. The weedy 0.18A balancer resistors should be doing something to rectify it, but it's actually getting dramatically worse for no apparent reason.

@derfreiemensch 10 месяцев назад

Correct, I see it the same way you do

@davidpenfold 10 месяцев назад

@@derfreiemensch Or possibly bad voltage readings, maybe due to being in parallel?

@OffGridGarageAustralia 10 месяцев назад

Solution will be in the next video.

@davidpenfold 10 месяцев назад

@@OffGridGarageAustralia It's going to be changed parameters and a firmware upgrade, isn't it?

@davidpenfold 10 месяцев назад

I was right! Ok, I basically covered almost all bases, but their 0.4 firmware was seriously bad 😳

@gregorbabic7756 10 месяцев назад

On v2 Seplos, balancing works quite OK... yes it is slow, but over a period of a few weeks, mine managed to balance completely "unbalanced" pack (I did not do a top balancing when I assembled the cells) from almost 250mV deviation to below 30mV at ~3.56V per cell... I charge up to 57V pack voltage. Last week I upgraded my battery pack from 1p16s to 2p16s... again, no top balancing. Now I need a few days of sun, to see how unbalanced are the cells and if the BMS is still able to balance 2s configuration of EVE LF280K. It worked fine with 1s. BTW Andy, did you try to measure if there is any balancing current present on the balance wires? 180mA should be quite easy to measure...

@OffGridGarageAustralia 10 месяцев назад

Thanks a lot for sharing. Good info here. For how long do you keep the battery at 57V when fully charged? That must be enough to keep the balancer active and working. Yes, I have measured the balance current when we had the first look at this battery a while back. I could not measure anything. We have the solution now, it will be in the next video tomorrow.

@gregorbabic7756 10 месяцев назад

@@OffGridGarageAustralia It does not stay long at 57V, because Seplos stops charging once "100%" is reached, and then does not resume charging until you drop down to 96%. So most of the sunny days, there is around 4 hours where battery sits at 100%. But the voltage is between 55V and 57V, still high enough to do the balancing, which is set to start at cell voltage over 3.45V.

@alluynlaurent5772 10 месяцев назад

Hello, what do you think about the new JKBMS BMS ? Do you already test it ? I would be really interested to have your expert feedback on this BMS.I live in New Caledonia and I have watched most of your videos. I am a big user of SEPLOS BMS. Thank you very much.

@OffGridGarageAustralia 10 месяцев назад

It's not out yet. On sale from the 10.10. if it does not get delayed again. I'm a big JK fan, so I hope the new BMS will be what we always wanted.

@abhishekkushwaha2455 10 месяцев назад

🐸🐸🐸

@alexanderwamuth6073 10 месяцев назад

This is the reason why we implement a Daly-Active-Balancer (4A-Version) in each of our batteries. Result: TOP BALANCED ALL THE TIME! The biggest deviation I've ever seen was 25mV !!!! Under normal conditions the deviation is less than 10 mV !!! By the way: we are charging and discharging from 20% to 85% nearly EVERY DAY 😜

@OffGridGarageAustralia 10 месяцев назад

Well, if you charge only to 85%, you cannot really tell if the cells are balanced unless you have other batteries than LiFePO4.

@alexanderwamuth6073 10 месяцев назад

@@OffGridGarageAustralia I cannot understand that. First of all, I have to rely on the data from the BMS. The data regarding the balance status is also generated there. Also, the batteries are charged to 100% every few cycles. Also in this operating state, the very low deviations of the individual cells are reported by the BMS. If you were right, then any BMS would give unrealistic balance values when the SoC is below 85%.

@OffGridGarageAustralia 10 месяцев назад

@@alexanderwamuth6073 Any BMS will have trouble balancing LiFePO4 below 95%. It is not possible. You may be not familiar with the charge and discharge curves of LiFePO4 cells. We have tested this many times and there are heaps of videos here on this channel. Balancing below 3.45V/cell makes no sense and does not even work. Charging to 80% and then balance the battery cannot work, hence you see deviation of 10-25mV only at this point.

@alexanderwamuth6073 10 месяцев назад

@@OffGridGarageAustralia This means that the information on the balance status is meaningless for all charging scenarios below 85%. This would imply that almost all batteries inevitably enter an "unbalanced" state over time, as they are never charged to 100%. This inevitably leads to capacity losses. This in turn implies the need to fully charge batteries from time to time and to perform top balancing as part of these charging processes. Since the balancing status can only be determined when the batteries are fully charged, the information on the voltage differences between the cells in a large part of your videos would not be meaningful. No offence, but I can't believe that.

@OffGridGarageAustralia 10 месяцев назад

@@alexanderwamuth6073 all test videos are here on the channel. Most LiFePO4 batteries charge to 100% actually. This 80% myth is a leftover form Li-ion batteries.

@airgead5391 10 месяцев назад

Perhaps you can get a contra connector for the balancing leads. Than make a snake cable on the contra connector for the NEEEEEEEEEEEEEEEEEYYY You could also parallel a small neeeeeeeyy permanently to the balancing leads. Ask Seplos for a contra (PCB) balancing / monitor leads connector.

@OffGridGarageAustralia 10 месяцев назад

I've asked them for the type of connectors they have used for the balance cables. No reply...

@chuksobi593 10 месяцев назад

Andy jkbms just lunched a new bms for storage systems with active balancer inbuilt....

@OffGridGarageAustralia 10 месяцев назад

Really?

@chuksobi593 10 месяцев назад

@@OffGridGarageAustralia yep and it looks good

@warnamegaputra1441 10 месяцев назад

What brand of BMS do you think is the best?

@OffGridGarageAustralia 10 месяцев назад

It depends. The best for what?

@s300bhp 5 месяцев назад

Hi Andy, I have a SEPLOS Mason 280L and x16 Grade A EVE LF280K Battery Bundle which I have built by watching videos from everywhere possible including Seplos as they don’t supply any installation instructions with the kit. This kit comes with the active balancer so has extra plugs on the main board which I am finding hard to know which way they go. The company that supplied it here in the UK are not very knowledgeable about the technical side of things and my emails and WhatsApp messages are just ignored by Seplos. You have said that you are in contact with them, can you suggest the best way to contact them please? Thanks Merv

@aureltanasan1413 4 месяца назад

did you already sorted this? one harness of 4 wires goes to the dry contact socket, next to lcd and switc, and the other 2 wire is power supply.

@s300bhp 4 месяца назад

@@aureltanasan1413 sorted thanks

@JayDee25895 10 месяцев назад

I've come to the conclusion Seplos leaves a lot to be desired.

@OffGridGarageAustralia 10 месяцев назад

Wait for the next video...

@andreas4175 10 месяцев назад

I don't quite get it - why not simply add/use an active balancer? All the problems should be gone then if configured properly. Why would one not want an active balancer?

@camielkotte 10 месяцев назад

Maybe it is a command structure issue. The engineers can't say the designer boss is wrong... I really don't know either. This is so weird. Luckily I waited before buying .

@niktak1114 10 месяцев назад

It's not needed for many systems (like my main one with seplos packs).

@OffGridGarageAustralia 10 месяцев назад

They mentioned something about having an external active balancer for the Polo as there is not enough space in the battery box. I have clearly shown that the capacitive balance as well as the NEEY will easily fit into the case. Both would actually fit at the same time with still lots of space around it.

@mfgxl 10 месяцев назад

Everyone is so mesmerized by this difficult situation that no one is hitting the "THUMBS UP"

@OffGridGarageAustralia 10 месяцев назад

Yes, don't forget the Thumbs up button! 👍

@SkypowerwithKarl 10 месяцев назад

What pain in the butt. If Andy is perplexed, these things are hopeless. Batteries should arrive balanced or with the ability to do so within a charge or two. What was Seplos thinking sending not ready batteries to Andy?

@OffGridGarageAustralia 10 месяцев назад

I've asked this question as well.... Well, luckily Seplos has now provided a solution for the problem.

@quattrohead 10 месяцев назад

Seems like Seplos have !ucked up the default settings on their own batteries as well as the separate BMS like the 10E. How stupid can they be ? Hopefully they will get this sorted with new recommended settings and/or firmware.

@OffGridGarageAustralia 10 месяцев назад

I think it is fixed now. It will be in the next video.

@mabiolabi9368 8 месяцев назад

Bms_3.0 bluetooth app for andoid Does anyone know the password for changing settings?

@dumitruluca5119 3 месяца назад

Seplos111

@dumitruluca5119 3 месяца назад

Sorry: seplos111

@garymcconnell1072 10 месяцев назад

Do I remember correctly that you had a faulty seplos bms if so use the connector from that

@OffGridGarageAustralia 10 месяцев назад

Not that I remember, no...

@garymcconnell1072 10 месяцев назад

@@OffGridGarageAustralia was temperature and balancer board not bms

@paulcurtis5496 10 месяцев назад

Like# 188 - ugh - gesundheit!

@OffGridGarageAustralia 10 месяцев назад

Thanks, 👃

@mikesgarage394 10 месяцев назад

How about using lower current NEEEEEEEY with magnets to hold on leads? The terminals may be nickel.

@OffGridGarageAustralia 10 месяцев назад

We have another solution now...

@tujuprojects 10 месяцев назад

I’m waiting when you stick that screw driver into wrong place 😊

@OffGridGarageAustralia 10 месяцев назад

It will be on camera... 😁

@GapRecordingsNamibia 10 месяцев назад

Electrically, getting 1.5A to burn across those resistors does not seem possible, the maths does not add up. 3.6V/20ohms is only 180mV? Am I missing something? Even if they are switching in 3 of those resistors at once across a cell, which is what I am thinking with the two open spaces, that is still only 540mA..... I must be missing something........ Thanks Andy. Appreciate your effort.

@timchambers5242 10 месяцев назад

The burning was first about existing balance wires if connected to a high current external balancer. 2nd was the upto 0.65W through a probably 1W max resistor, ~20 Ohms SMD squeezed side-by-side so they get very hot & the circuit avoids 2 beside each other being on together.

@OffGridGarageAustralia 10 месяцев назад

Maybe they mean 1.5A in total? But I have never seen more than 5 cells balancing due to this 'space' they need in between.

@AdventureMotoEnduro 8 месяцев назад

SINCE 2 jks bms clapped i thinking this one and active hitech

@derfreiemensch 10 месяцев назад

Come on Andy, where is the next video???? Give it to me🌍🔜 🖥

@OffGridGarageAustralia 10 месяцев назад

I just a few hours sleep! Just 3h... 😄

@jackcoats4146 10 месяцев назад

@opless 10 месяцев назад

28th ;-)

@OffGridGarageAustralia 10 месяцев назад

Couldn't find a medal for you with that number.

@opless 10 месяцев назад

@@OffGridGarageAustralia your replies more than make up for it! Keep up the good content dude! 😁

@OffGridGarageAustralia 10 месяцев назад

@@opless 🏅

@realeyesrealizereallies6828 10 месяцев назад

I'm not a fan of the pouch cells, to put it mildly...I had an issue with a battery that had them, and after looking into them further, they are not for me..I'm no fan of these prebuilt batteries either..The warranty with some of them is very good, if it is actually honored, and I have my doubts..Not to mention the prices, while the best they have been, are still to high, in comparison to building your own out of prismatic cells..You develop an intimate knowledge of the system when you do it yourself and can have replacement parts on hand in case of an issue, or order something quickly..But, it's not for everyone..So...Shoot for the most reliable warranty in your home country. Would be my strategy if going in that direction..

@OffGridGarageAustralia 10 месяцев назад

If you buy such batteries from sellers in Australia, you easily can pay 3x as much as ordering directly. And they just buy them in China anyway and top up their margin. And, as I said before, not everyone has got the time, tools and knowledge to build their own battery, so hence I test some here on the channel. Not sure what bad experience you had with pouch cells?

@PlexMulti 10 месяцев назад

Hello

@OffGridGarageAustralia 10 месяцев назад

🥉

@showme360 10 месяцев назад

This Polo battery is not designed for us DIYers, its designed for the mass market, and so their customers would be ignorant of what's going on is side the pack. So in my mind your wasting your time trying to make a point that Seplos BMS mk3 in this product is anything special. The Mason on the other hand is design for us DIYers and so therefore balancing down to the single millivolt would count, it is their testing bed for the mass market products they want out there, as volume is king.

@OffGridGarageAustralia 10 месяцев назад

Yeah, the Polos are meant to be used as they come from their factory. Well, that's what I tried in the past videos... and failed. The packs should not go into an protection or alarm state when using their default parameters the battery comes with and show a red flashing light at the front. What does that tell the customer? So, here we go, the DIY guys take them apart and find the problem. Now it's up to Seplos to fix it. And they have responded...

@adairjanney7109 10 месяцев назад

rich people

@amudlifecrisis 10 месяцев назад

Oh for the love of the frog, no more balancing videos! Please, I beg you, stop! Just leave the batteries alone! They’re fine! 😂

@timchambers5242 10 месяцев назад

"Balancing" is in the title, viewers can skip them & watch something else if not interested in more "balancing".

@amudlifecrisis 10 месяцев назад

Well it’s a joke, making light of the shear volume of balancing videos, see the little smiley guy with the tears laughing! Sorta like when we were busting his balls over the whole polishing the battery terminals and bus bars. Haha 😁

@OffGridGarageAustralia 10 месяцев назад

OK, ok, ok, I will call it the B-word from now on😄

@Raphael_Hofmann 10 месяцев назад

ANDYYYYYYY, it is a Firmware problem in this BMS...it is not balancing at all at this stage...they released a new FW version...we have to see, if it actually fixes the balancing. 1,5A 🤣 These "Engeneers" are really not good man.

@OffGridGarageAustralia 10 месяцев назад

I have this new firmware for a week now but wanted to show what the actual problem is. The 'solution' will be coming in the next video😉

@Raphael_Hofmann 10 месяцев назад

Yea...the balancing works now. But If you use the CAN communication and the BMS is controlling the Inverter, than you have a problem with the CCL. Once the SOC is reset to 100%, the CCL is set to 0A and the Inverter can't hold the voltage...@@OffGridGarageAustralia

@Sanwizard1 10 месяцев назад

Most Chinese software is dubious at best.

@OffGridGarageAustralia 10 месяцев назад

But, on the positive side, software can be easily updated.

@chuksobi593 10 месяцев назад

What's wrong with spending extra money to put a better balancer in their product, trust me china knows how to minimize a lot even if it ruins the whole product

@OffGridGarageAustralia 10 месяцев назад

Would cost them $20 per battery to add one. No one would ever complain again. But, they now have a different solution for the issue. It'll be in the next video.