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Strange 18650 capacity test
#11
(05-14-2020, 12:03 AM)Yiğit Wrote: ..................can you explain 4 wire discharging method in my charger there is 2 3 4 5 6 s balance sockets..........
2 Wires for load and 2 wires for balance.

The 2 load wires will have a voltage drop on them so you will not have the proper V reading.
The 2 balance wires do not have a load on them so their actual voltage is correct.


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#12
Correct... you want to use a JST connection (typical balance lead) with just 2 wires on it (1s).  2 for the load, 2 for the measurement.

Its useful in multiple ways...  


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#13
Overvolting wont lower the amp draw unless the controller works based on wattage.
Higher voltage also increase current due to u=i*r.

The balance leads will then act as voltage meassurement. If you use original wires for the charge/discharge port they are very thin and have resistance inside causing voltage drop. Those 4 together creates the 4 wire testing.

2 is for drawing current in or out and the 2 from the balance socket are there to meassure voltage. Suddenly you get alot better reliable results.
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#14
I actually learned this from daromer... and after implementing this on all my balance chargers, my termination voltages are pretty much spot on. It helps a lot.
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#15
İmax doesn't have 1s balance lead it seems

And when i measure with multimeter voltage difference is 0.05 volts max
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#16
Use a 2 cell plug but only use 2 of the connections and that should give you the results you need.



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#17
I connected the balance cables to the battery terminals with the other red and black cables.
When i open voltage meter on imax it shows voltage correct, in balance screen , but when it comes to discharge imax says no battery found.
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#18
I have to ask.
Are the main leads hooked up to the battery and is there an option for 1s in the setup?

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#19
You can select 1s from imax but there is no balance cable for 1s, only for 2 3 4 5 and 6s balance
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#20
(05-14-2020, 01:41 PM)Yiğit Wrote: You can select 1s from imax but there is no balance cable for 1s, only for 2 3 4 5 and 6s balance

Yes you have to make your own balance cable or just use the neg and first pos from the 2s cable.
Remember most people would never "balance" a 1s so the cable is not included but for a proper V reading on a 1s you need to have that connection.


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