my e bike not running anymore

jackzee

100 µW
Joined
Jan 26, 2025
Messages
8
Location
malaysia
My 36v battery have 34v when i connect with controller
The voltage drop a lot . When connected only have 2v
Its my battery problem?please answer to me.thanks
 
My 36v battery have 34v when i connect with controller
The voltage drop a lot . When connected only have 2v
Its my battery problem?please answer to m
 
What voltage does your battery have before connecting it?

A 36v battery should be about 42v full. If it's not, then either your charger isn't charging it, or the battery has a problem inside (usually failing cells causing the BMS to prevent charging or discharging, to help prevent further cell damage that can cause a fire).

What happened before the problem started?
 
Before connecting 33.8 v
When connecting 2.something v
i don't know what happen before i buy second hand from fb market place 😅
 
What voltage does your battery have before connecting it?

A 36v battery should be about 42v full. If it's not, then either your charger isn't charging it, or the battery has a problem inside (usually failing cells causing the BMS to prevent charging or discharging, to help prevent further cell damage that can cause a fire).

What happened before the problem started?
At first display light .horn.head light.tail light working when power on only motor not spin
 
What voltage does your battery have before connecting it?

A 36v battery should be about 42v full. If it's not, then either your charger isn't charging it, or the battery has a problem inside (usually failing cells causing the BMS to prevent charging or discharging, to help prevent further cell damage that can cause a fire).

What happened before the problem started?
 

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When i connect battery and controller it show 28v and slowly up to 34v. This condition is when the thin red wire is not connect to main red wire
 
When i connect battery and controller it show 28v and slowly up to 34v. This condition is when the thin red wire is not connect to main red wire
thin red wire from power 3 pin
 

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That XT60 connector there in your last photo is a disaster waiting to happen. What is that, a screw jammed into the solder cup holding a burnt wire into it? 🤯
 
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