XR battery dead after 4km, any ideas?
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@bulletxtime E16 is a breakdown in communication between the BMS and controller. The green and white wires specifically.
The OWIE chip sits between them so it might be worth checking those wires are the correct way around and that the OWIE chip is working.
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@lia I'll check the wires again. Also I test the total battery voltage and it gave me 43.4V even though the OW app said 100%...
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@bulletxtime 43.4v is really low for an XR! Like that's below the low voltage cutoff for the 15 series cells all together. 43.4/15=2.89v per cell. 3v is the cutoff.
Each cell should be anywhere between 3v and 4.2v. Together in series between 45v and 63v.
A new battery is probably the safest bet. If you want to dig deeper you could probe the balance connector between cells to see if it's a single bank of cells that just died or the whole pack is bad in which I would assume the BMS might not be good.
Did all the parts definitely come from an XR and not a Plus?
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@lia I tried plugging the OWIE chip to PC but I get nothing. I think it's dead.
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@lia here is a reading of all the cells from the balance connector:
C1 = 2.68
C2 = 3.06
C3 = 2.64
C4 = 3.06
C5 = 2.70
C6 = 3.05
C7 = 3.07
C8 = 3.09
C9 = 3.08
C10 = 2.70
C11 = 2.71
C12 = 3.05
C13 = 2.70
C14 = 3.07
C15 = 2.70I'm sure the battery (it says 15s2p on it) and controller (the app shows it as XR) came from an XR. The BMS I bought with the controller but the guy also gave me a set of OW+ rails. Could it be that the BMS was from a OW+ and that's why it doesn't charge?
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@lia So I checked the wires of the owie chip twice. I also pressed reset on it why trying to connect it to my phone because it wasn't blinking.
I then decided I would cleanup my wires and replaced a bunch of Frankenstein wires. Plugged everything back in without the owie chip and now the board correctly shows 1%... I have no idea why it was showing 100% before and now 1%. It's charging now so I'll let it fully charge for a few days and I will update.
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@bulletxtime That's some good news! Hope you can get those cells back above LVC :)
Do you have a pic of the BMS in question. Just so I can see if it is the right one. I'm sure it is since you'd run into all sorts of other compatibility issues long before riding but good to check. -
@lia Of course! It's charging so I didn't unplug anything. Will take better pics later if needed.!
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@bulletxtime Yeah that one's fine :) Definitely not a plus BMS thankfully.
Fingers crossed it works out fine!
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@lia I'll keep you posted! Thanks for your help.!!
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@bulletxtime Welcome ^-^
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@lia Alright, after charging to 100%, here are the new cell readings:
C1 = 4.08
C2 = 4.10
C3 = 4.08
C4 = 4.10
C5 = 4.08
C6 = 4.10
C7 = 4.10
C8 = 4.10
C9 = 4.10
C10 = 4.09
C11 = 4.09
C12 = 4.10
C13 = 4.09
C14 = 4.10
C15 = 4.09Total 61.5
Would you consider this balanced?
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@bulletxtime That's balanced enough. There is a little cell degradation since they should peak at 4.2 but that's expected for an old used battery so I'd say that's good to ride! :)
