E-Bike Wiring Issue

[vinbho]

Hi everyone,

I’m having an issue with one of my Ansmann e-bike batteries and could use some advice.

I have two Ansmann e-bike batteries, both new, but one of them is not working correctly:

• Battery 1: This battery shows 36V across both the positive (1st and 2nd pins) and negative pins and works perfectly with my e-bike.
• Battery 2: This battery only shows 36V on the 1st positive pin and the negative pin. I do not see any voltage on the 2nd positive pin. As a result, this battery does not power the bike, even though it used to work fine before. The issue seems to occur when 36V is present only on the 1st positive pin.

Additional Details:

• The problematic battery was functioning correctly before, but now the e-bike display won’t turn on when using it. This is same issue with any new compatible battery
• I’ve replaced the controller and display with new parts and tested the bike with two new compatible batteries, yet the issue persists.

Questions:

1. How can I troubleshoot this problem further? Are there any specific tests or measurements I should try?
2. Could this issue be related to the e-bike’s wiring, even though I’ve replaced the controller and display? Is there any way to repair the battery or resolve the wiring issue?

Any advice or suggestions would be greatly appreciated. Thanks in advance for your help!

 

[docw009]

Can you clarify the time line of events? Is this how it happened.
1, Bike worked fine with two batteries,
2. You replaced controller,
3. Now bike only works with one battery that has positive on both terminals,

 

[wturber]

Does the battery have a fuse and have you checked it?

 

[vinbho]

Thank you! I finally identified the issue using multiple batteries. The functioning battery has two pins with 36 volts, while the non-functioning battery only has one pin with 36 volts. This has been the case since the beginning. However, over time, the battery mount box, which has the 5-pin connector that connects the battery to the controller, developed an issue. The problem was that the 5-pin connector was broken.