Bafang mid motor - What is the red wire on the battery cable?

[Spex]

Which cable is which on the bafang mid motor connecting the battery?

I feel like the black and the red are the wrong way round. What would happen if they were?

I have recently bought a new UPP battery to upgrade the rubbish yoshi power pack and am stumped.

Any help will be loved.

 

[HumanPerson]

Any pictures?

 

[HumanPerson]

Welcome to the forums, by the way

 

[Spex]

Any pictures?

Not atm. Im at work. Can do this evening

 

[HumanPerson]

 

[HumanPerson]

 

[Spex]

View attachment 19161

On the battery cable... what is the red one? Positive or negative or live or what?
Im wondering if im matching colours of cables rather than the correct ones. If that makes sense....

Thanks for the help btw

 

[Atavar]

Almost always red is positive.

 

[Spex]

Almost always red is positive.

What would happen if they were wired wrong?

 

[HumanPerson]

What would happen if they were wired wrong?

It would fry something in the controller

 

[Atavar]

What would happen if they were wired wrong?

Or the battery would explode

 

[Nine6Teen]

check it with a Volt-Ohm meter

 

[Krista22]

On the battery cable... what is the red one? Positive or negative or live or what?
Im wondering if im matching colours of cables rather than the correct ones. If that makes sense....

Thanks for the help btw

If you're going to experiment there is the option of draining the battery down to near empty first thereby reducing the possibility of causing damage or explosions. I recently did this by connecting my battery to a 240 v bar heater. After 10 hours or so got a full 52v battery to 4% and 36v

 

[BiggKidd]

If you're going to experiment there is the option of draining the battery down to near empty first thereby reducing the possibility of causing damage or explosions. I recently did this by connecting my battery to a 240 v bar heater. After 10 hours or so got a full 52v battery to 4% and 36v

Hope the battery lives through that! Why not just test the wires?

 

[Krista22]

(BTW; I posted this because of someone else posting about frying controllers and batteries exploding)
Yeah, battery is fine, it's just a rapid way to drain the battery . . the heater just gets slightly warm . . in fact it's a lot less drain and strain on a battery than an ebike motor is, e.g. And yes, do all possible tests first but erring on the side of caution, if you're concerned, drain the battery before plugging it in. I drained mine because it was reading 60v and has a 48v label on it in an Engwe Engine Pro. The bike was dead and I wondered if the battery has blown something cos it's so over capacity! I've come to believe that it must actually be a 52v battery with a wrong label on it.
'A fully charged 52V e-bike battery typically shows around 58.8V, but it's normal for the display to show slightly less, such as 58V, due to factors like BMS balancing or charger output variations. '