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Liitokala Engineer Lii 500 Charger
#21
After nano protect, does it work again?
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#22
I processed about 1k cells with four of these units, all bought from Banggood.

Notes:
- I only do the discharge test and once the “END” is flashing the cells come out, since they are in charge cycle again. I can charge them later on something else.
- if you put cells in all slots and then unplug and plug the charger in, you can switch to NOT and 1000Mah it will change all slots! Makes things much faster.
- the charger only discharges at 500mah in 700 and 1k mode.
- sometimes when you pull a cell out, the charger gets stuck and thinks a cell is still inserted, wait a minute and it will clear for the next cell.

Careful!! If the charger get unplugs, you will lose all the Mah data from the cycle, it’s really sucks when you are 4hrs into a discharge.
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#23
(11-14-2017, 11:51 AM)SemaJG Wrote: Bu şarj cihazlarında çok fazla kullanıcı olup olmadığını merak ediyorum.
Şu ana kadar üç tane servisim var ve bazen TP4056'ların önceden belirlenmiş doldurmak için Çin'den gelmesini beklerken, onları daha fazla satın aldım.
İronik olarak, Liitokala'nın biri şimdi oynuyor ve bir slot artık oynuyor. Suçlu slotu 4.31V ve Şarj menüsündeyken döngüde END tarihinde.

Mümkün olan bir yeniden ayarlama / ayarlama var mı? Ucuz bir şarj cihazı olduklarını söylediler ama onlar şu ana kadar diğer birimlerden memnunum, ancak bugüne kadar sadece 100 hücreyi yaptılar.

levye

8205A çipini değiştirirsen sorun çözülecektir.
SemaJG likes this post
Zaman kullanıldığında kıymetlidir.
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#24
@ samajc make you're pc psu as stable as you possible can for those tc/tp's and they really want to have 1 amp each.
The better you can meet there requirements, the better they will preform, and they will be very accurate.
Cell phone charger is good for one! your pc psu must handle the amount of tc/tp's per 1 amp!
So a 10 amp pc psu can handle nine!(eight~), you really want to have it balanced and extra power left over.

Those where mine! findings on testing those tc's.
I will post more test's if i got them(30) incl the zb2l3's

Best

@ kaminoreal,
What kind of testers do you work with?
If you don't mind me asking.

Thanks in advance,
Best
Selling everything at marketplace.
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#25
@100kwh-hunter Thanks for the information, good stuff.
Jimmy
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#26
LiitoKala Lii-500 inconsistencies:

I am trying to figure out if the Lii-500 smart charger is any good. I have an LG LGDAS31865 cell (nominal 2200mAh capacity when new) that I am testing with the Lii-500 as well as with a dedicated discharger board with dual cables. The cell was negatively charged at -1.49V when liberated from its battery pack a while ago but seems like it has recovered successfully.
  • The SANWU discharger reports a capacity of 1870mAh at 500mA and 2.8V cut-off.
  • The Lii-500 smart charger reports a capacity of 2090mAh on bay 1 and 2210 on bay 2. Bays 3 and 4 are to be tested next. Same discharge capacity and cut-off.

Which one device would you trust? What I am noticing is that it looks like the Lii-500 funnels all discharge heat to the cell, because it's probably sitting over the discharge capacitors resistors, and the cell gets quite hot during discharge. The same cell stays cool on the SANWU discharger, since this board has a holder for the cell.

I have measured the current during discharge on both devices and they both stay relatively close to 500mA.
Where does the difference come from? Any chance they calculate the capacity in a different way?
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#27
(05-17-2019, 08:55 AM)thanar Wrote: LiitoKala Lii-500 inconsistencies:

I am trying to figure out if the Lii-500 smart charger is any good. I have an LG LGDAS31865 cell (nominal 2200mAh capacity when new) that I am testing with the Lii-500 as well as with a dedicated discharger board with dual cables. The cell was negatively charged at -1.49V when liberated from its battery pack a while ago but seems like it has recovered successfully.
  • The SANWU discharger reports a capacity of 1870mAh at 500mA and 2.8V cut-off.
  • The Lii-500 smart charger reports a capacity of 2090mAh on bay 1 and 2210 on bay 2. Bays 3 and 4 are to be tested next. Same discharge capacity and cut-off.

Which one device would you trust? What I am noticing is that it looks like the Lii-500 funnels all discharge heat to the cell, because it's probably sitting over the discharge capacitors,(resistors) and the cell gets quite hot during discharge. The same cell stays cool on the SANWU discharger, since this board has a holder for the cell.

I have measured the current during discharge on both devices and they both stay relatively close to 500mA.
Where does the difference come from? Any chance they calculate the capacity in a different way?
Ahh the Lii-500 Engineer. I have 3 of them and have noticed that the results of this tester are somewhat inflated I would say after cross checking with other testers and my SKYRC MC3000 (The reference unit) that the Lii-500 is about 5% inflated.
See chart below:
 

First off testing a -1.49V Cell???? You sure you didn't have the leads swapped on your DMM?? I have seen some negative voltages but never that high.

I am not familiar with the SANWU but I assume it is only a discharger. Correct?
Just because the cutoff voltage is the same that does not mean the mA cut-off is the same.

Also when charging the battery what was the cutoff mA to complete the charge? Some chargers have a mA cut off at 100mA at 4.2V which would reduce the actual capacity of the cell.
The Standard charge parameters for the LG LGDAS31865 is 1075mA charge with a 4.2V cutoff at 50mA
Standard discharge is 430mA with a 3V cutoff.
What mode where you using on the Lii-500 Nor Test or Fast Test?

For purposes of a percentage of capacity left the cell still falls into the >80% capacity remaining. So all in all not a bad cell. But -1.49V?????
Chart of your statements.


Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 8/7/2019
Total Number of Cells Recorded and processed                 6149
Total Cells required for PowIRwall                                   2856
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   2760
For Info Google Drive
Not your average Wolf       
            Cool
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#28
Hey Wolf,

Thanx for chiming in. I couldn't believe it either on the -1.49V and I am sure I didn't mix the cables, unless I went color blind for a few minutes while trying to figure out what was going on. The cells had recovered in a day to around +0.50V and after 3 or 4 days they rested at around +1.80V, both of them. Magic!

Anyhow, I am testing the Lii-500 now with a fresh LG MF2 cell as well on all slots as well on the discharger and will report back as soon as I have results.
Here's a link to my ongoing result. Select the last tab on the sheet:
https://docs.google.com/spreadsheets/d/1...sp=sharing
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#29
(05-17-2019, 05:26 PM)thanar Wrote: Hey Wolf,

Thanx for chiming in. I couldn't believe it either on the -1.49V and I am sure I didn't mix the cables, unless I went color blind for a few minutes while trying to figure out what was going on. The cells had recovered in a day to around +0.50V and after 3 or 4 days they rested at around +1.80V, both of them. Magic!

Anyhow, I am testing the Lii-500 now with a fresh LG MF2 cell as well on all slots as well on the discharger and will report back as soon as I have results.
Here's a link to my ongoing result. Select the last tab on the sheet:
https://docs.google.com/spreadsheets/d/1...sp=sharing

@thanar

Yep I have had your insomnia sheet linked for quite a while and I see you already have 1 result of the LG MF2.
Remember to get the "proper" results the cell should be charged at 1050mA with a 50mA cutoff. and discharged at 420mA with a 2.75V cutoff.

But your first result in slot 1 with the Lii-500 is close enough for their minimum of 2100mAh.
Spec sheet
https://drive.google.com/file/d/1wy5XbXX...qZ5Yt/view

Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 8/7/2019
Total Number of Cells Recorded and processed                 6149
Total Cells required for PowIRwall                                   2856
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   2760
For Info Google Drive
Not your average Wolf       
            Cool
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#30
I did some more tests on both the Lii-500 and the dedicated discharged. When set to discharge at 500mA, both actually do so at 510-515mA steady, which I guess is OK. Both clocks work fine, so I don’t get it why the results differ by almost 10%. I mean, Ah calculation is just (constant current) x (time), should be almost the same! The only noticeable difference is that when the cell is discharging on the Lii-500, it gets around 10deg over the ambient temperature (18 deg. C), since it’s sitting on the warm charger, while the dedicated discharger has a separate holder for the cell:

I will be uploading a couple of thermal images soon.
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