DL24 Interesting new (dis)Charger!

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siletto
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DL24 Interesting new (dis)Charger!

Hi!
I am not affiliated in this products by any means, but I thought that I’d share with you, and also you could help me out a bit.
It ‘s quite a new item on Aliexpress, sold by only 2 stores right now, and few reviews.
Seems to be a nice tool to measure battery discharge graphs, driver circuits, chargers, etc, and has more performance than the EBD-M5 type that many of you have here.


I have one on order for 2 weeks, so it should come within a week or two.
I’ll try to test it out using my moderate equipment once it arrives.

ATORCH Store DL24
HiDANCE Store DL24

The key Specs that caught my attention:
-Max. 200V
-Max. 20A
-150W and 180W versions, with only the fan seemingly different
- digital control of current
-CC CV CR CP modes, which is a huge upgrade from the generic 180W analog ones offering only CC.
-digital communication with wired and bluetooth means, datalogging
-protections for over-everything
-all types of usb on-board
- PC and smartphone apps

The main reason I am showing this product to you is that if you are interested in this programmable load, and thinking of ordering one, we should push the sellers to release the logging software source codes for bigger sales, or at least parts of the protocol it uses to transmit data to the PC. I am sure it is not rocket science, and could be reverse-engineered anyway. It is universal across their Atorch USB and other power meters.
I wrote to them through Aliexpress, but given it is a new product with about 50 orderings, they were not super helpful.

There is a smartphone app included, and it is very limited. It does not auto-resize itself, and on a modern smartphone with bigger than fullHD screens, it has an ugly empty bar under the application window.
It also includes a Windows app, which seems to be working and installed OK(without the meter of course), but is also does not support window resizing, and the bottom part is missing from my older, 1366×768 notebook screen.

They include also a NI Labview application, which can be made very versatile with measurement and logging capabilities, but unfortunately it is made in chinese LabView, and it will not run correctly on machines with Roman characters. It is compiled, and non-editable. In one review describing this problem, the seller advises to download a locale-editor app, and changing the localization of the PC or the Labview Runtime software, but neither of those work actually.
If they would share the sources with us, the software could be upgraded to half-decent at least, making a very nice budget lab/flashlight power meter.

If you are thinking of buying one and have a minute, please leave a message on Aliexpress to the seller to correct/release the software.
I’ll leave a reply on this post once it arrives.

andygs
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That does look like a very good discharger / tester with many useful functions. It’s a pity the software will almost certainly let it down.

Have you heard back from the seller/manufacturer?

Also available from banggood for USD $41.69.

If the apps were better for English (or open source), then that would be perfect.

siletto
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No, unfortunately not. I think they still sold some hundred pieces, maybe tht was all their goals.

Honestly I did not use it much, I did not have much free time in the laat half year or so, but still think it is a nice discharger/analyzer, I already printed and designed a case for it.

andygs
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siletto wrote:
No, unfortunately not. I think they still sold some hundred pieces, maybe tht was all their goals.

Honestly I did not use it much, I did not have much free time in the laat half year or so, but still think it is a nice discharger/analyzer, I already printed and designed a case for it.

Nice. Were you able to get some useful information and graphs from it from your testing? Is it able to see easily things like internal resistance of a battery etc? Does it have 4 wire testing?

archer28
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gotory wrote:
The main reason I am showing this product to you is that if you are interested in the burden of this program, and the thought of ordering one, you should sell it to sellers to release software source code for big sales, or at least parts of the process it uses to record data to a PC. I had read more here for them. I’m pretty sure it’s not rock solid science, and it can be reworked as well. It is distributed across their Atorch cable and other power meters.

Looking for this explanation long time ago!

andygs
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This discharger has a serious flaw, it does not have 4 wire testing, IE it doesn’t have a separate set of connections for measuring the battery voltage. And what I’ve found is significant voltage drop over the draining wires, meaning it’s wildly innacurate.

d_t_a
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andygs wrote:
This discharger has a serious flaw, it does not have 4 wire testing, IE it doesn’t have a separate set of connections for measuring the battery voltage. And what I’ve found is significant voltage drop over the draining wires, meaning it’s wildly innacurate.

Just wondering, would it be possible to “remedy” the DL24 unit so that the voltage can be detected from some other point (maybe another connection point in the DL24 device), to simulate 4-wire testing?

andygs
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I don’t think so. I did ask the manufacturer about that and they also said no. And there was nowhere obvious to connect voltage sensing to either. I think it works best as a CC load really, don’t use it’s other functions as without accurate voltage sensing it’s not very useful.

Pukker
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Now there is an 4-Wire version. https://www.aliexpress.com/item/1005001712924193.html?spm=a2g0s.9042311.... I have the two wire version. My mosfet was broken with 60 Volt / 1A. That may not be a problem reading the specs. Repaired with an Original IRFP260. Earlier ordered some on Aliexpress, they were rebadged fakes. RDSon was 10 times higher than the original datasheet. The mosfet on the device was also an rebadged one, that one was exactly printed as the fake ones I received from Aliexpress. Even the manufactory logo was printed, in just another look as the original. The realy original one, ordered from Farnell works without problems more 120 watts. For long live I think stay under 75 Watts. Components buying on Ebay or Aliexpress is like an lotery, you can be lucky or getting fake components. BTW. Parts on Aliexpress were advertized as 100% original.

Zebretta
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I have two of the 4 wire versions.

They both work very well.

Still lacking, however is PC software. I want VERY MUCH to be able to record the discharge data on my expensive batteries so that I can compare that data as time progresses.

I can get the Android app and the Windows 10 app both to run, but the Android app erases the entire data set if there’s any interruption in the bluetooth (and that happens too much) I don’t even see a way for the Windows software app to record the data.

I’m looking to see if DataExplorer can record it.

d_t_a
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Zebretta wrote:
I have two of the 4 wire versions.

They both work very well.

Still lacking, however is PC software. I want VERY MUCH to be able to record the discharge data on my expensive batteries so that I can compare that data as time progresses.

I can get the Android app and the Windows 10 app both to run, but the Android app erases the entire data set if there’s any interruption in the bluetooth (and that happens too much) I don’t even see a way for the Windows software app to record the data.

I’m looking to see if DataExplorer can record it.

I doubt DataExplorer supports the DL24 at this time.

However, I’ve seen it mentioned that HKJ’s own software supports the DL24P, some mention of it is here:
https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-mu...

I haven’t tried HKJ’s software on the DL24P personally though. May want to check it out (and maybe can report back, how well it works)

More information on HKJ’s “TestController” software can be found in his webpage here:
https://lygte-info.dk/project/TestControllerIntro%20UK.html