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- เผยแพร่เมื่อ 5 ก.พ. 2025
- I noticed my Ebike battery was out of balance so i decided to use an active balancer to rebalance the entire battery. It work, just took a long time, but as part of an annual routine maintenance program on a battery, i think its a good idea!
Link to balancer
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Link to battery meter
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This is a really helpful video. Thanks for making the video and sharing.
That meter looks really useful. Hopefully it'll help me diagnose and fix my ebike battery problems.
I may try that active balancer too.
That's cool you included the trace repair footage too. Helpful to know these little tips and tricks.
Thanks i appreciate it. I just tested a better balancer last night and doing a video is a few days. These balancers really do work well. Most batteries can be revived with a good balancing.
Thanks Steven. I was thinking of trying the same thing with mine - I bought mine after watching your video about it. I also purchased a 5amp balancer that let's you choose between 4 to 24 series battery packs. Now I know it will work. I knew there was a reason I subscribed to you a couple years ago lol. 😊😊👍
WOW - looks like my comment is the first...
Can I ask what balancer you bought & where from please
@@TheBigwesb I had to edit my reply, I sent you the wrong link in my first reply, and when I tried to edit the comment, TH-cam kept giving errors, so had to try several times to get it to post. Hopefully this new comment will cause you to look at my reply again - in case you followed the first link to a 4s Balancer :).
@@Outside-In.askin same question.. what balancer? 😅
@@skeimi78 Sorry, my comments keep getting deleted, so not sure how to help you.
My new video drops tomorrow testing the 4s-17s balancer
Nice job Steven, Thanks for explaining everything.
I personally do it a bit different. I top charge with some success but very seldom because I don't like to maximum charge either 52 v battery I own. If I sense an issue, say a battery starts to short charge and gets nowhere near 58.8 volts max charge and charger shuts off because BMS max charges strongest cells and weak cells fall out of line...I only learn this by falling well short of 58.8v max charge because I rarely charge my batteries over 56-57v...then I take the battery apart and manually balance charge parallel group or groups responsible. If determined weak cells continue to fall out of line with stronger cells based upon subsquent charges, I replace the cells that are weak in a given parallel group. When more weakness shows up throughout the pack, I ultimately replace the pack, hopefully after hundreds of charges.
How I roll. I have avoided using smart BMS's with voltage readouts or active charging at lower voltages which I wish was available with standard ebike batteries becausa as you explain, top charging has its limitations and maximum charging Li-Ion cells degrades cell life.
Key to cell life other than not hammering a battery with maximum current draw is...
1. Top quality, name brand cells like Samsung, Panasonic etc
2. Short charging battery
3. Choosing a large enough battery capacity with more parallel cells such that a typical ebike trip uses less than 50% or so of the battery capacity.
Cheers.
I have just built a new battery for my ebike.
It's a 13s 6p using Samsung 53G1 21700 cells at 5300mah. The bms is the 100 balance smart bms (40a) with active balance at 1amp with Bluetooth and WiFi connectivity.
All cell groups are balanced within 0.001v.
I'm very happy with this bms.
Also used the purple spot welder from aliexpress using two 1500mah 120c discharge lipo's in parallel to spot welder 0.2 pure nickel strip with ease.
Can't understand why batteries aren't built like this, using an active balancer, and with bluetooth, it would be my perfect battery, no more guessing if the battery is balanced or not. Maybe one day all ebike battgeries will be built like this
Very interesting. I have that same battery tester. I never thought about using it that way. I think that's a good way to use it. That way you can monitor all the cells instead of depending on the BMS. You don't really know the results of that without testing it. One thing I will tell you is I've had a lot of batteries and the number one cell always seems to be worse than the rest of them. Some with BMS and some I charge through a charger. I would like to know if anybody else out there has a problem like that. Love the video.
Well yeah cheap bms dont want to step down the full battery pack voltage to 3v so they rather just use the sweet sweet 3-4.2v from the first cell, making the first cell suffer more
Hello I need to make/buy one of these connectors to use this board what is it called? Please
there is a smart version of this balancer with a BT module and an app. Might be a good alternative to monitor the S groups voltages and balance at the same time compared to tester + "dumb" balancer :)
To me it seems you have issue with cells in 1st group.
After a couple of discharge cycles you should see the difference in the cell voltage higher again.
The best method to determine if group one is bad is to have battery under load and then use the cell monitor - if group one is weaker then the rest then you'll see the "cell voltage difference" go higher and higher
Hey steven i really love your content ! Thank you for sharing with us your knowledge. I've just ordered this balancer and im asking myself what happens if one group is significantly discharged like for example 2.5 volts or even less ? Is this device going to balance it anyway or are there any restrictions on how low the weakest group can be ? If you know answer for this question i would really appriciate it ! Thank You one more time !
Most devices don't like cells below about 2.5v. you might have to hook up a power supply and bring the voltage of the low group up above 3v.
Thanks ! I hope you never stop posting really. Cheers my friend !
So its been a few months...the grand question...what spot welder are you using the most😅?
BRFIC is my go to but it gets really hot quickly. Lately I have been using the 3 pulse spot welder I reviewed 9 months ago.
Great!! I have a 36V 3p10s battery what balancer can I use?
Any 10 s 36v balancer will work. I'm about to test a new one
@@stevenc22 Thank you !!
Great video, thanks! Isn’t the Neey a better option since it is compatible with other string configs?
Yeah ive been considering the Neey. It is more expensive, but i do like the ability to do multiple strings