Smart bms help (am I retarded...)

How-Tos & Esk8 mechanics
1

Hey hey fellas, please tell me why I’m being retarded rn…

Just finished a new 13s7p molicell pack and wired up all the balance leads for a 13s smart bms I got that uses the typical XiaoxiangBMS app, but I am not seeing any p- on this unit even after taking all the coverings off and inspecting. Seller said it’s rated for 30 amps discharge but how do you discharge with no p-? Was just going to do charge only but not sure how to do that either with no p-… what am I missing?

(Yes, I have puffed in the stiiizy today already but I don’t think I’m that high atm, lmk otherwise though cause it’s happened before :slight_smile:

Pics of board below. Trying to go zoom on a new build with this new bat ASAP so appreciate the hell.

PS - seller (from Amazon) had/has no other (none to start with) diagram or Info that could help at all unfortunately.

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1 Like
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C- and P- look like the same connection based on the FET setup.

2 Likes
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That’s a common port charge/discharge BMS. It will discharge through the C- port

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Thanks Fellas! Got working. BMS was doa so through an old HM10 on there and will be doing all of the settings today. Any links or references or guides on all the paramters at all by chance? Running 13s7p of molicell with 8 inch wheels, matrix II’s,k stormcore, flux deck with some of the new flippy 84’s. LMK and thanks again!