Test/Review of Charger 1.5A 3.6-4.2V (TP5000)

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HKJ
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Test/Review of Charger 1.5A 3.6-4.2V (TP5000)

Charger 1.5A 3.6-4.2V (TP5000)

DSC_4427

This is a charger module from ebay, it is based on the TP5000 charge controller, depending on settings it can either charge with 4.2 volt or 3.6 volt.
The official specifications from the ebay page is:


  • Charge module- Switch mode charging.
  • Current- 1.5A. changing the charging current by changing the Rprog resistor
  • Charge precision- 1.5%.
  • Input voltage- 4.5V-9V.
  • Full charge voltage- 4.2V/3.6V.
  • Led indicator- when soldered with LED
  • Input interface- 4.5-9V.
  • Work temperature- -10°C to +85°C.
  • Inversed polarity protection – NO.
  • Size- small to 17X18X5mm.

I got it from ebay dealer: wkws20

The above specifications are not completely correct, the module I got was configured for 2A charging.

DSC_4414

I got it in this bag without the led soldered in.

DSC_4424 DSC_4422

The regulator is a switcher with an inductor.

DSC_4418 DSC_4419

DSC_4420 DSC_4423

functions


The supplied led is a 3 pin two color led that fits directly in the holes.

jumpers

Default selection is 4.2 volt with 10% precharge current, to enable the other function a knife must be used to cut the trace between the two solder points.

currentSelect

The charge current can be anything from 0.1A to 2A, this table shows some of the possibilities. Without a heatsink it is best to keep the current at 1A or lower.

supportedBatteryTypes

supportedBatterySizes

Charging LiFePO4 works, but is not ideal.



Measurements


  • Power consumption when idle is 0.1 watt
  • Discharge with 2uA when not connected to power.
  • Discharge with 6uA when connected to power (5 volt supply).
  • Will restart if battery voltage drops to 4 volt (4.2V setting).
  • Will restart if battery voltage drops to 3.45 volt (3.6V setting).
  • From 0 to 1 volt it will charge with 0.4A (1A setting).
  • From 1 to 2.9 volt it will charge with 0.1A (4.2V/1A setting).
  • From 1 to 2.4 volt it will charge with 0.1A (3.6V/1A setting).


Charging 4.2V LiIon

Charger%201.5A%203.6-4.2V%202A%205V%20(PA18650-31)

This looks like a very good CC/CV voltage charge curve with termination at 10% of charge current, here 200mA, the current is slightly below 2A due to heat.
Compared to linear regulators this regulator reduces current closer to 4.2V, this will make the charging a bit faster.

Temp3121

M1: 95,3°C, M2: 92,3°C, M3: 79,3°C, HS1: 117,5°C
The chip gets fairly hot and reduces the charge current.

Charger%201.5A%203.6-4.2V%202A%209V%20(PA18650-31)

With the higher input voltage the charge circuit could not maintain full charge current, it got too hot and regulated the current down.

Temp3123

M1: 113,7°C, M2: 92,6°C, M3: 81,0°C, HS1: 115,6°C
With 9V input the diode gets very hot, this make the circuit board hotter and the chip has to reduce the current even more.

Charger%201.5A%203.6-4.2V%201A%205V%20(PA18650-31)

At 1A charging current the CC/CV voltage charge curve also looks fine.

Temp3125

M1: 55,1°C, M2: 54,5°C, M3: 46,6°C, HS1: 57,9°C
1A current looks much more acceptable in temperature, nothing is really hot here (At least for electronic).

Charger%201.5A%203.6-4.2V%201A%209V%20(PA18650-31)

At 1A there is no heat problem with 9V input.

Temp3127

M1: 78,7°C, M2: 68,5°C, M3: 58,9°C, HS1: 79,9°C
With 9V input the diode gets warm again and increases the temperature of the chip, but it is still acceptable temperatures for electronic.


Charger%201.5A%203.6-4.2V%201A%205V%20(SA18650-26)
Charger%201.5A%203.6-4.2V%201A%205V%20(BE18650-26)

Both the new and old 2600mAh battery was charged perfectly.

Charger%201.5A%203.6-4.2V%200.1A%205V%20(KP14500-08)

Replacing the two 0.1ohm resistors with a single 1ohm resistor the current is down to 0.1A. I tested with a 14500 cell and it was charged perfectly to 4.2 volt, but with this low current ot took some time (0.1A is for smaller cells).


Charger%201.5A%203.6-4.2V%200.9A%205V%200.5ohm%20(PA18650-31)

Simulating a long cable from a USB supply did not really affect the charger.

Charger%201.5A%203.6-4.2V%200.9A%205V%202ohm%20(PA18650-31)

Adding more resistance between the 5V and the charger will slow down the charging, but the battery is filled.

Charger%201.5A%203.6-4.2V%200.9A%205V%205ohm%20(PA18650-31)

Even with 5 ohm in series it works, but very slowly



Charging 3.6V LiIon

Charger%201.5A%203.6-4.2V%201A%205V%20(18650-LiFePO4)

Breaking the 3.6 volt jumper I tried charging a LiFePO4 cell. The charge voltage is fine, but I do not like the automatic restart, it is placed at too high voltage.



Conclusion

It is a nice module for charging 4.2 volt LiIon batteries, even fairly small ones, the flexibilty in input voltage makes it useful for 6V unregulated solar panels.
I am not impressed with 2A performance, either a heatsink must be added or one of the resistors must be removed for best lifetime.



Notes

Here is an explanation on how I did the above charge curves: How do I test a charger

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

L4M4
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Thank you for this test!

What does that “10% precharge” mean? Never read it before.

Edit: Can someone give me a link to this charging circuit?
In germany, you only have access to PowerSellers from China – For me, the “wkws20”-Shop is empty.

HKJ
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L4M4 wrote:
What does that “10% precharge” mean? Never read it before.

It means it will charge a over discharged LiIon cell careful as it is supposed to be.
The reason you can disable it may be because the circuit can also be used as a led driver.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Halo...
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Very nice!
Thank you HKJ!

Is the termination always at 10% of charge current? Hard to see exactly where it is on your 100mA chart.

Halo...
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L4M4 wrote:
Can someone give me a link to this charging circuit?
In germany, you only have access to PowerSellers from China – For me, the “wkws20”-Shop is empty.

wkws20 seller: http://www.ebay.com/itm/4-5-9V-1-5A-Lithium-ion-or-iron-phosphate-LiFePO...
Another seller: http://www.ebay.com/itm/4-5-9V-2A-Lithium-ion-or-iron-phosphate-LiFePO4-...
HKJ
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Halo… wrote:
Is the termination always at 10% of charge current? Hard to see exactly where it is on your 100mA chart.

Yes.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

fritz15
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Thank you very much for the test. Does this charger drain the battery empty if it is disconnected from the power source and the battery is still connected?

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Hello!

TP5000 @ aliexpress

 

Cheers Party

HKJ
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fritz15 wrote:
Thank you very much for the test. Does this charger drain the battery empty if it is disconnected from the power source and the battery is still connected?

No: “Discharge with 2uA when not connected to power.”

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

ko4nrbs
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Could you use this without the LED? If using Solar power wouldn’t the LED take power away from the charger?
Bill

HKJ
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ko4nrbs wrote:
Could you use this without the LED? If using Solar power wouldn’t the LED take power away from the charger? Bill

The led do not use much power, but you could leave it out.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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In retrospect, seems you complained from a too high of a LiFePO4 charging restart voltage, HKJ.

From what I've observed among some different cell reviews, the actual LiFePO4 resting voltage seems to lie ≈3.4V.

Mmm, digressing a bit off the topic, I was wondering if I could (snugly) fit 3×10440 cells inside a PP3 battery case… 

 

Cheers fellows Party

DoubleA
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Barkuti wrote:

I was wondering if I could (snugly) fit 3×10440 cells inside a PP3 battery case…

In parallel setup?

and on the first day he said "Let there be light"...

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Of course in series, DoubleA.

 

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But you can’t charge those cells in series with that module.

and on the first day he said "Let there be light"...

Barkuti
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Yes, I can't charge 3S 10440 LiFePO4 cells with these modules, DoubleA; I never said I was going to do such a thing Wink (off-topic).

 

Cheers 

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Oops, my bad. I thought you were trying to charge multiple cells. Big Smile

and on the first day he said "Let there be light"...

supersonic
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Hi,
I am new!
I have bought two Sanyo NCR20700B batteries.
I would like to charge the batteries by using TP5000.
What you think, is this module suitable for the battery?
If not could you suggest something else?

Thanks!

BlueSwordM
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It would be great charging at 1A.

Would work quite well with an appropriate 20700 cell holder, and charge in around 4-5 hours, which would be perfect for the cell.

Barkuti
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supersonic wrote:
… could you suggest something else?

Thanks!

If you can do with 5V of input, TP4056 modules are small, low profile, good and cheap. They were tested by HKJ to charge at 0.85A, can work in parallel from the same input supply (input and output grounds are common), are sold in a variety of charging boards with miniUSB or microUSB input and even basic DW01A + 8205A protection circuitry… and are this  cheap: https://www.aliexpress.com/item/Free-Shipping-5Pcs-TP4056-Micro-USB-5V-1A-18650-Lithium-Battery-Charger-Board-With-Led-Indicator/32804303644.html

Another alternative is a proper CC/CV module, I have many XL4015 units and they work very nicely for a variety of purposes (fully customizable current and voltage output). Example: https://www.aliexpress.com/item/5A-DC-To-DC-CC-CV-Lithium-Battery-Step-Down-Module-Charging-Board-LED-Power-Converter/32799532951.html

 

Cheers Smile

supersonic
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great, thank you I will try it out… Thumbs Up

supersonic
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Regarding XL4015, is there any indicator to see whether the battery is fully charged?

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supersonic, in the above picture two leds can be seen at the lower right board corner; out of these two the one at the left (closest to the LM358) is on when in CC mode, while the rightmost one lights up (and the left one turns off) once the output current has tapered off below 10% of the set ratio at the right (CC) trimpot.

Alternative unit with slightly different PCB and colored leds:

https://www.ebay.com/itm/1-2-5-10Pcs-Lithium-Charger-5A-CV-Buck-Step-Down-Power-Supply-Module-LED-Driver/191993567480

 

These boards won't work in constant current mode with less than ≈7V of input, bear this in mind though. 

 

Cheers Party

Originally posted on Thu, 05/17/2018 - 01:23; edited to add extra clarification info.

BlueSwordM
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Wait, is that why when I tried to charge super capacitors with a 5V power supply, the current kept going up until the power supply shut off, and not doing it with a laptop power supply?

Now I get it. I have 5 of them regular buck converters, and 5 of them which have MPPT operation.

These work very well at parallel charging, and safe low voltage recovery voltage at <2V lithium ion cells at 50-100mA.