Fogstar battery problem

[Raul]

What are the voltages per cell? And can you change any advance settings?

 

[tkk]

It could be that the BMS is giving an incorrect reading as to how full the battery is.

Have you measured the voltage across the battery terminals with a multimeter since the discharge switch has been put back on?

Good thought, its higher but with Li its got a very poor relationship with Charge level, can be quite high with very low charge level

 

[jezport]

Have you emailed Fogstar?

 

[tkk]

What are the voltages per cell? And can you change any advance settings?

3.06,3.08,3.06,3.05. Can only change settings that have values already, and this changes a bit on each access. Upload is very slow,probably incomplete. Home Screen showing 16A capacity. Thanks

 

[tkk]

Have you emailed Fogstar?

Yes, gettin replies but last indicated they were puzzled and contacting BMS maker

^{_{Subscribers  do not see these advertisements}}

 

[StillGoing]

Good thought, its higher but with Li its got a very poor relationship with Charge level, can be quite high with very low charge level

Taking the terminal voltage reading, you could divide the answer by 4 to find the average cell voltage and compare that with what the app says.

 

[Raul]

Yes, gettin replies but last indicated they were puzzled and contacting BMS maker

Not good enough, how long you had the battery?

 

[tkk]

Not good enough, how long you had the battery?

Since May. Worked apparently ok until now. Unusual thing tho was voltage at 100% charge always showed 13.3 or so.Would have expected higher if settings/BMS was set up well. I never accessed Advanced as didn’t know code until recently. Fogstar sound helpful and reasonably speedy with replies. I was not on the case yesterday so was a little behind in sending them screenshots. Updated them this pm so hopefully tomoro will tell

 

[StillGoing]

Since May. Worked apparently ok until now. Unusual thing tho was voltage at 100% charge always showed 13.3 or so.Would have expected higher if settings/BMS was set up well. I never accessed Advanced as didn’t know code until recently. Fogstar sound helpful and reasonably speedy with replies. I was not on the case yesterday so was a little behind in sending them screenshots. Updated them this pm so hopefully tomoro will tell

I had a problem with something I bought from Fogstar earlier this year and I found them to be excellent in resolving the problem.

 

[tkk]

Update. Becs at Fogstar sent mail offering exchange so they could test it. Ive replied asking about arrangements for this but not got a reply yet. Hopeful so far.
tk

^{_{Subscribers  do not see these advertisements}}

 

[jezport]

They are fast, get yours ready to go, nine was exchanged next day

 

[tkk]

They are fast, get yours ready to go, nine was exchanged next day

They promptly replaced it. It seems that it is a bluetooth interface problem reading advanced settings. they have checked the BMS settings directly and they are normal. Very happy with their handling of it overall.

 

[LEONJO]

I spotted few settings are wrong, as : under voltage protection set at 2.2v. That’s wrong, and potentially destroy the battery. Minimum should be set at 2.5v.
- balance starting voltage 3.3v, that will unbalance a already balanced pack. The voltage should be set 3.4v min with 3.45v better.
-cell full voltage 0.03v? What? Should be set at min 3.55v.
- charging under temp protection not set, why? It should be set at 4C.
-discharging under temp release -140C ? That should be a tad above -20C

There’s many more, those settings are well mangled up, I amazed the battery worked at all. Sooner or later would of stoped.
Contact Fogstar and ask them for a replacement, that bms looks that’s gone south, or lost it’s settings.
- I like this one
Charging over temp protection set at. -221.7C. Should not exceed 60C, a55C it’s better.

Hi Raul,do you have a copy of the correct settings please, my battery is not charging correctly.

 

[Raul]

Hi Raul,do you have a copy of the correct settings please, my battery is not charging correctly.

Post you settings and I can advise what settings are out. Each bms has a different order but all do the same exact thing.
If you post yours, I will follow each setting as it comes, and correct the values where needed.

 

[MitchandJenny]

Sorry attach. Didn’t go 1st time

View attachment 816822

Ben at Fogstar +447761510607 is a VERY helpful and knowledgeable chap. And, he’s on WhatsApp
Mitch

^{_{Subscribers  do not see these advertisements}}

 

[Pugsy]

Hi Raul,do you have a copy of the correct settings please, my battery is not charging correctly.

Hi. Rodger RogerIvy at off-grid solutions does a good YouTube video explaining the battery settings it's worth a watch,but I'm sure Raul can sort you out with the info also,he knows his stuff.
Hope you get it sorted .
Cheers Cris .