Is this Ping 20Ah 48v 32s 2P or 8s 2P?

[Frakentrike]

Sorry for the newbie question, but I wanted to double-check what the "S" rating on my pack is so I can set my CA v3 battery gauge to show the right fuel gauge display.

It is divided into 2 half-packs each containing 32 cells with the cells in groups of 4 (I think they are connected in parallel within each group?) and then with each of the 8 groups connected in series within each half-pack. Does this mean the pack is termed 32s 2P even though not all the cells are in series? or should that be 8s 2P treating each group of 4 paralleled 3.5v cells as a single mega cell? Or have I got this completely wrong?!

With my CA v3 configured for 16s, the battery gauge display empties too quickly - it was even worse when it was set at 8s - so I'll shortly test it set to 32s and see if that is a better approximation.

Here's what one of the half-packs looks like naked:

Thanks!

 

[Sunder]

Ping 48v batteries are 16S.

All 48v LiFePo4 batteries have to be 16S.

By the way, Your S x P = No. of cells, so if you have 32 cells, it has to be 32S1P, 16S2P, 8S4P, or some variation of that.

 

[Takemehome]

Looks like a 16S4P

 

[Frakentrike]

Thanks guys. With 32 cells in each half-pack, 16S4P does make sense. I'll tweak the Ah rating setting and see if that fixes the inaccurate Battery gauge display on the CA.

 

[dogman dan]

Its 4p 16s. Each half is 4p 8s.

16s 4p would be 16 cells in series, and four 5 ah packs like that then paralleled.

Yours is four 5 ah cells soldered in parallel, with 16 cell groups in series.

 

[Peter.bp]

It seems to me that this one is 8S4P configuration.
It is visible 8 BMS wires on top, missing BMS wire for most negative contact (B0 or B-).
B1 BMS wire is black one and B8 (or B+) is red.

Definitely not 48V.

 

[kdog]

That's only half the pack.

 

[dogman dan]

I know it's really nit picking here,, but the part visible is 4p 8s

The cells are in groups of 4 p.

8s 4p would be wired completely differently.

 

[Frakentrike]

Its 4p 16s. Each half is 4p 8s.
16s 4p would be 16 cells in series, and four 5 ah packs like that then paralleled.
Yours is four 5 ah cells soldered in parallel, with 16 cell groups in series.
.....
I know it's really nit picking here,, but the part visible is 4p 8s
The cells are in groups of 4 p.
8s 4p would be wired completely differently.

Thanks Dan, I think I've wrapped my brain around how it all works now. Looks like I was right to originally set the CA to 16s after all. Good to know!

 

[dogman dan]

48v ping is definitely 16s, but the industry standard for 48v is 15s for lifepo4,, and 13s for the manganese types.