Have a look at the pictures i have attached, BMS/balancer cable is on a separate connection on the busbar, not connected at the terminals.
Both BMS and balancer shares PCB and cable to each busbar.
Seplos BMS goes bananas when NEEY is working!
- Thread starter MrSwede
- Start date
Both BMS and balancer shares PCB and cable to each busbar.
houseofancients
Solar Wizard
And this is exactly your issue
sunshine_eggo
Happy Breffast!
I know. Per the below, I was showing you...
This was tied back to your claim that you can't make modifications. You could simply detach the NEEY harness from the PCB and wire directly to any of these three locations on each bus bar.
Quattrohead
Solar Wizard
This is a connection issue but not exactly in the way you're thinking.
But it sounds like you're on to it so all is well.
Alkaline
Solar Wizard
When you had it at 4 amps I saw your screenshot showing 1 cell in the 4+ volts. Is this how the NEEY balancer works over volts the cell to push amps?
No, it's just that when that "big" current flows through that "tiny" cable (from PCB to busbar, or perhaps including the PCB) it results in voltage misreading from the BMS.
Actual voltage on the terminals for that cell was ok (measured with multimeter). Also the Enerkey app (for managing the balancer) showed the correct measurements.
So buy extra balancer leads and don't use the PCB for the balancer, use it only for BMS.
Alkaline
Solar Wizard
Do you have a way to measure the voltage coming off of the balancer? I don't think your BMS was acting weird I think it was detecting the voltage from the NEEY balancer. I think the reason NEEY is able to constantly balance at a set amp rate is because it over volts the cell.
I saw something very similar when charging cells with the ZKE 40, towards the end it slow down, but if you don't wait you can set the voltage to like 4.2 volts and all of a sudden instead of sending .4 amps it will shoot up to 3-4 amps. So it would speed up the charging but you were also sending incoming voltage to the cell above 3.65 so maybe it could be hurting the cell?
I saw something very similar when charging cells with the ZKE 40, towards the end it slow down, but if you don't wait you can set the voltage to like 4.2 volts and all of a sudden instead of sending .4 amps it will shoot up to 3-4 amps. So it would speed up the charging but you were also sending incoming voltage to the cell above 3.65 so maybe it could be hurting the cell?
Just for future reference both the Neey active balancer and JK bms’s are very adaptable to various lead lengths. You can splice to extend or cut it to a stub, they will calculate the resistance and adapt. You don’t need to keep them the same length, just long enough to be neat and not too taught. Im sure as you now know they don’t share well. The Neey cranks current down the little wire, pauses, evaluates the result and decides on the next cell to fill or drain. The Neey is even blinded during the process. You can only imagine what the bms was thinking.
sunshine_eggo
Happy Breffast!
Never. It may give a high voltage reading at the NEEY end of the harness, but the cell will not measure over volt at the terminals.
The NEEY measures how its activity affects the voltage measurement and compensates.
I have came across the same problem. Using the eel kit. If I remove the neey harness cables from PCB and connect my other set of cables to the same small hole that the BMS uses it should be fine or does it need to be connected to the positive terminal stud.
You should be able to use the same smaller hole in the busbar (that connects to the PCB aswell). That is what i intend to do once my cables is delivered.
houseofancients
Solar Wizard
But that is when using an active balancer, and yes it will do so..
Again, these PCB leads are only ment for the seplos BMS, as the BMS calculates quite a lot of parameters .
Next to that, the traces are too small to do anymore current than max 1a as @MrSwede already noticed..
This is , by all means, and as already stated a user/install error.
If using a neey, use it's own leads , perf. Using their own busbar connection and you'll be a happy camper
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Alkaline
Solar Wizard
Can someone measure the voltages coming off the neey balancer see if they are in the 4 volt range (using the 4 amp setting or even 3)
Please...
With cherry on top...
Unless your diabetic in that case a sugar free candy drop...
Thanks ?
Please...
With cherry on top...
Unless your diabetic in that case a sugar free candy drop...
Thanks ?
Changed the cables I have several different versions of cables. I have 1 for PCB board connection I have another for terminal connections and the last cable is to add to small screw hole. Using the terminal connection cable. Hopefully set can balance by morning have neey back to 4 amps again.
if this causes such problems why has EEL adapted the PCB board to fit the Neey on to it. At present have been charging for some time and the voltage difference is dropping slowly currently at 0.052v. had the battery charging at 10 amps not sure why it was set so low so gonna miss the cheaper charge window for tonight.
houseofancients
Solar Wizard
Because EEL in reality is a copy cat, and sales organisation and not a engineering company.
May I suggest you read the BMS manual ( it is posted in the resource section), if you do so, you'll find out pretty quick why the BMS limited the charge amps
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