Focus Whistler cutting off

sarobbins.uk

Finding my (electric) wheels
Mar 10, 2022
9
0
Hi everyone, after some help on a Focus Whistler ebike with a Bafang motor/controler and the integrated bottom bracket sensor.

the bike works great but when I hit the speed limiter the battery turns off, I don’t just mean temporarily until my speed comes down, I actually have to stop and restart the battery! Any thoughts on this?

thanks
Stu
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
5,207
2,509
Telford
The battery is tripping out because it can't supply the current for whatever reason. By Bafang motor, do you mean BBS01 or what. If it is BBS01, rry using a lower gear.
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
5,207
2,509
Telford
It's a hub-motor, so different story. The first thing to check is that the motor connector is pushed in all the way to the line, not just in tight. Come back and confirm when you've checked that the edge of the connector comes exactly to the line, or show a photo of it.
 

sarobbins.uk

Finding my (electric) wheels
Mar 10, 2022
9
0
Strange, it doesn’t cut out when I’m climbing steep hills, only when I’m flying down them! I disconnected the feedback to the battery so I just have positive and negative connected and it still happens so I guess it’s either shorting when it hits the limit or as you say it can’t supply current under certain conditions. It’s the same with 2 different batteries. I can’t look at the electronic circuit as it’s filled with sealant
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
5,207
2,509
Telford
Strange, it doesn’t cut out when I’m climbing steep hills, only when I’m flying down them! I disconnected the feedback to the battery so I just have positive and negative connected and it still happens so I guess it’s either shorting when it hits the limit or as you say it can’t supply current under certain conditions. It’s the same with 2 different batteries. I can’t look at the electronic circuit as it’s filled with sealant
What I said only applies to crank-drives. A hub-motor puts the battery under stress at low speed. Check the cable at both ends.
 

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