Question Problems with charging my Ashida

[LordDoggo]

Hello everyone, I am having a strange problem with my Ashida that I am building where the batteries won't charge fully. I have tried troubleshooting the problem for quite a while and that is what I tried:
1. I've changed some settings on RVLoader, like increasing the charging amps, to encourage it to charge
2. I've bought a 60w PD complient charger to see if that was the problem (a Amazon Basics one-port GaN USB-C Wall Charger w/PD)
3. Rewired the hole thing to check if it was bad soldering
4. Tried to understand the PMS2 and PMS-PD3 circuits with no success
4. Seached through the forums if there was a solution for this

Unfortunatly all of those atempts didn't work and now I am out of ideas.
The battery will charge up to around 3.4V and no more than that and I measured the current through the battery while charging and it goes up to 0.2A (as it was almost fully charged). Apart from this problem the Ashida works perfectly and I've alredy played a little with it. Now my Ashida is disasembled as I wanted to make sure it has nothing to do with the wii trim, as of note the trim is NOT the problem as the problem of the batteries still occurs even without the trim mounted and soldered.
If someone needs a photo of the Ashida or any specific parts please tell me.

 

[randomguy]

Hi,could you please send some pictures?

 

[fdraghi]

pictures of the wiring and the settings page would help a lot.

4. Tryied to understand the PMS2 and PMS-PD3 circuits with no success

Not really sure what you mean by that.

 

[LordDoggo]

Hi,could you please send some pictures?

Sure! Here are some pictures.

 

[LordDoggo]

pictures of the wiring and the settings page would help a lot.



Not really sure what you mean by that.

What I really meant was how the PMS2 and PMS-PD3 charged the battery, like does the PMS2 charges the battery with constant voltage or amps? Or what voltage does the PD3 ask from the charger. That sort of stuff.

 

[randomguy]

I think you do a wrong connection on your pms-pd 3 because there is no bottom wires on it and there is 2 3.3v wires.

 

[LordDoggo]

Yup, that was on purpose, there are two 3.3v wires on the PD3 because it was easier to solder. I think the picture below will show better what I've done.

For the button wire, I've solder that to the switch on the Uamp board. The blue btn wire was sort of burried under the other wires.

 

[fdraghi]

what capacity did you set on the pms configuration page? also are both batteries at the same voltage to begin with? (also FYI the LED won't work until you set the correct LED type on the configuration page)

 

[LordDoggo]

I only changed the charging current on the battery, the type of on/off button (from button to switch), the type of LED and played a little with the fan settings. Aditionally the bateries were and are at the same voltage.

 

[fdraghi]

you should also set the total capacity to be the cells added together.

 

[LordDoggo]

Yup, if I'm not mistaken the total capacity is 10,000ma/h? If I have two 21700 batteries.

 

[fdraghi]

that depends on your particular cells... not all 21700 are 5000mah. The capacity should be declared on the battery label.

 

[LordDoggo]

Okay, after a quick search I found that the batteries are 5000mA/h. (The batteries are Samsung INR21700-50S)

 

[LordDoggo]

Hi, it's been a while. But does anyone have an idea of what could be wrong?

 

[fdraghi]

you never mentioned what happened after configuring the correct capacity...

 

[LordDoggo]

There was no chage in behaviour after I changed the capacity.

 

[LordDoggo]

It's been a while, and I've been thinking if the problem could be my pms-2, how can I test it to see if it could be the cause? Last time I checked, while charging, the voltage was about 3.2v when the battery had also like 3.2v, and it didn't charge above this voltage after I left it for a while. I couldn't measure the current properly so if it is needed please tell me how can I measure it.

Aditionally I measured the voltages going to the wii and those are normal. The wii functions normally for about 5 minutes and then it shuts off because of the charge the batteries.

 

[LordDoggo]

Okay, so I've tested the voltage in the pms 2 and pms pd 3 without the batteries and it shows 12~ volts, which seems normal I think. Can it be some errors in settings? If so can someone send me more or less the recommended settings or the settings they are using, please?

Additionally, I've now just noticed the marked electronic in the image gets hot while trying to charge. Is that normal?

Edit: I think that is not the cause as it doesn't get too hot, also I've tried charging the batteries and I left them charging for more than 3 hours, they went from 3.36v~ to 3.43v

 

[LordDoggo]

Okay, so I've rebuilt the ashida and these are the charging settings I have:

In the precharge current I've put 512mA because online I've seen it is recommended for the batteries I'm using (Samsung 21700 50s). That is the only thing I've changed recently.
Also everything except the charging seems fine, although I haven't tested audio yet.

I've also measured amperage going to the battery and it seems oddly low, like 20mA.

Should I change something in the settings or is it something in the PMS?