Phylion e-bike battery packs

[NeilP]

I have just acquired one ( with possibly more to come ) Phylion battery pack...
10 cells in series with built in BMS units...looks like a pair of 5 channel BMS's.
A Li chemistry of some sort...but not sure what ...solid rectangular packs2 inch by..5 or so, by about half inch thick.

The pack I have now has one cell down at 2.4 volts and all the others up around 3.8 volt...so I am assuming that is why the pack was dumped..low voltage and the BMS kicking out..could be wrong of course..have nto tried charging any of the cells yet.

Any one come across these packs before These have a http://www.50cycles.com label on them...not sure what they are off
Have not stripped the pcks enough yet to read the cells if they even have labels
The only thing the casing says is Phylion and the 50cycles logo and that it is a 37 volt pack

Anyone know the chemistry? Ah and charge voltage for them...will try 4.1volt per cell to just see what they do on the iCharger

 

[Doctorbass]

i know these rectangyular metal case cells

these are LiMn ( lithium manganese) max 2C rate

I have couples of oack that someone gaved to me that have the cells inflated a bit... 41V charger is best for these

Doc

 

[NeilP]

Cheers Doc.

I'll take the pack apart again tonight and charge each cell individually on the icharger and see what the capacity of each is like.

Not sure if the iCharger has a LiMn setting...do you know? if not what is the best settinf to use for these? I'll be doing them via by-passing the BMS unit to check each cell.

 

[Doctorbass]

Cheers Doc.

I'll take the pack apart again tonight and charge each cell individually on the icharger and see what the capacity of each is like.

Not sure if the iCharger has a LiMn setting...do you know? if not what is the best settinf to use for these? I'll be doing them via by-passing the BMS unit to check each cell.

Just choose Lipo(4.2V) or LiLo ( 4.1V)setting :wink:

Doc

 

[Lessss]

I need 3 single cells to revive a pack if you have a pack you can't salvage.

 

[skeetab5780]

ya i also have 10 of these cells, i use them for small odd jobs around the house seeing as they're so weak. mine are also expanded and bubbled out. They still charge and discharge nicely at a very low amperage. right now i have them build in a 3s3p configuration giving me 12.6v 30ah i use them to run a small inverter

 

[NeilP]

Well I went to buy some second hand Fox F32 forks this evening, and the sellers house was just beyond the local Amateur radio station ( an old german World War II Bunker) down a small track.

I got the forks and notice the radio bunker was in use, so I popped in to see them..I used to do ham radio...anyway..they were having difficulty removing some bolts from a telescopic 200ft radio mast. I have got the kit for that sort of stuff down the farm so they came back to mine and I got involved in that, so never got around to collecting the second pack or stripping the one I have down to cycle the cells.

So maybe in the next few days,

but If I have any spare cells, I can send them to you, sure

 

[jateureka]

I've seen a few Phylion battery packs that are the plastic brick type that goes in a soft bag on a rear rack used in DIY kits and all of those were LiPo and used Lipo chargers with 41.8V cutoff for a 36V nominal battery.

The photo of the battery case in the top posting looks almost the same as that used in the eZee Sprint and Torq and I think they are available in both 10Ahr and 14Ahr.

 

[NeilP]

Well I charged one pack via the built in charge lead and BMS board, then topped of each cell individually with the iCharger

Actually two parts to the system, not sure what does what exactly

There is a small board across the top of each block of cells, one connection to each cell, and there is also a main board with heatsink that connects again to each cell with the balance wires, and also takes the main current
Suspect the small boards deal with balance and the big board does LVC and maybe HVC as it handles the charge and discharge leads

The one pack that I charged, gave reasonable balance and shows 41 Volts or so one the output, and when connected to a bike fired up the controller and CA just fine, but the bike would not go, no throttle response at all, not even an attempt and the CA constant voltage throughout
This was connected with extremely thin wires though, and one end was only just shoved into the pack spring clips

The other pack, I charged direct via output terminals and not the charge port. This was a bad move, as I thought I would try a high charge rate, nothing excessive, 15 amps from the iCharger
I stopped charging when I could smell the cells gassing, and the pack was starting to creak and split
At this point I disconnected and took the pack outside into the yard, where it continued to creak and swell for the next5 minutes or so, no fire or flames though

I stripped the pack later and 3 or 4 cells have really puffed up other looked fine
I left them on the bench last week, am off down workshop soon to check on them again
Any cells that have held volts,I will cycle with I charger to see what capacity they have left
The complete pack, I will connect up to a bike again with thicker wires to see if that improves things
If not I may just bypass the HVC LVC board and see how the cells hold up under load