buddhafragt
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I have the same problem with a 20S / 200A JBD BMS, the voltage differences are at some cells 0.15V, that's not possible!
What is that for a junk BMS??
What is that for a junk BMS??
JBD smart BMS displays wrong cell voltage
- Thread starter sunrise
- Start date
I have the same problem with a 20S / 200A JBD BMS, the voltage differences are at some cells 0.15V, that's not possible!
What is that for a junk BMS??
About half the cell voltage difference issues are due to bad connections. Clean every connection, use anti-corrosion grease if necessary and ensure all connections are good and tight. If any connection is warmer/hotter than other connections, consider that a red flag.
buddhafragt
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I have already checked, the connectors are new, no corrosion, everything fits perfectly. All the time trouble with this chinese shit...
Swap the cells around. Does the voltage difference follow the cell or stay with the balance lead?
Is cell balancing turned on? At what voltage does it turn on?
Is cell balancing turned on? At what voltage does it turn on?
curiouscarbon
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The JST-XH connector sometimes has loose conductors. Maybe the harness is faulty?
The part that plugs into the BMS usually has a bit of silicone or some caulk type substance to keep the wires from moving. If any jiggle then that might be contributing to the anomalous readings.
Definitely cannot recommend it, but one user said they went as far as directly soldering to the metal pins inside the plug. Good luck.
Not saying it’s the connector, but just hoping to mention as a common failure mode around.
The part that plugs into the BMS usually has a bit of silicone or some caulk type substance to keep the wires from moving. If any jiggle then that might be contributing to the anomalous readings.
Definitely cannot recommend it, but one user said they went as far as directly soldering to the metal pins inside the plug. Good luck.
Not saying it’s the connector, but just hoping to mention as a common failure mode around.
sunrise
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In my case it was a faulty unit as I have another unit which didn't have the problem when connected to the same cells. I have just ordered 2 4s 200A one from Alibaba, I only need one and I am ok if one of them is faulty, it's about $70 a piece.
JBD / Xiaoxiang BMS Android App Downloads - wnsnty.xyz
Archived downloads of JBD / Xiaoxiang battery management system for android.
wnsnty.xyz
That has them.
Thanks for the report from the trenches. Good luck!
Hi
what kind of proove needs to be provided? Having same issue? check all Cell 1 is showning wrong voltage
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