Is anyone using YPSDZ-0550-4? Four channel capacity tester 50A

[zbynek]

I've run into YPSDZ-0550-4, a four channel 0-5V, 0-50A charger/discharger/tester available at alis:

• https://www.aliexpress.com/item/1005004467910409.html
• https://www.alibaba.com/product-detail/YPSDZ-High-Precision-4-channel-5V_1600699292652.html

Is anyone using them? Are they real? It shows graphs on the displays, can they be downloaded?

The outputs can be used in parallel to test a single cell with 200A. For the listed price of not even $400 it seems like a great deal.

Thanks
Zbynek

 

[MarcoWasRight]

Are these new? I prowl Ali for new capacity testers often and just recently saw these

 

[MarkusBA]

Hi, I am using the single channel version YPSDZ-0550 since a few days now and I am quite happy with it. I own already a ZKETECH EBC-A20. But this one can charge only with 5A, so I wanted to buy a EBCA40L with 40A. Searching on Alibaba, I came across YPSDZ-0550 which has even 50A and is a little bit cheaper.

• EBC-A20: 5A charging, 20A discharging
• EBC-A40L:
  • 40A charging, 40A discharging
  • can connect a PC for controlling and recording nice diagrams
  • PC must be connected and running on during the whole test, if you want a diagram
  • changing settings with the buttons of the tester is quite difficult, bad user interface
  • little bit more expensive
• YPSDZ-0550:
  • 50A charging, 50A discharging
  • color display, nice user interface, change settings with a rotary encoder
  • diagrams directly on the screen
  • no USB port for connecting a PC
  • little bit cheaper

Here are some photos:


Settings screen (here for a 18650 LiIon cell)


Testing the 18650 cell:


My tests with a 280AH CATL CW310 cell:

1. Charging from 3.3V to 3.55V with 50 A, cut off current 1A (grenn line: current, dropping from 50A down 1A)


2. Discharging to 2.5V -> Capacity =297.62Ah. The discharge current is constantly 50A (green line on the top of the diagram))

 

[jack huang]

Nice graph