Using an Exsiting Battery Pack for Yike Bike

[yikepower888]

Dear All E bikers<

A little complicating what I am trying to achieve…but basically, I want to use my existing LiFePO4 battery pack for my Yike Bike. I want to know if the existing LiFePO4 battery is compatible with the AC charger and the Yike Bike.

The specification for the Yike bike is: ]LiFePO4, 450 Watts

AC Charger (Yike Bike): 44.1V L-ION Battery charger:
Input AC100-240V 50/60Hz, 250VA
Output: 44VDC, 4.5A
Input connector: 3 plug circular connector, Series 5 (female)


The existing battery I want to use is: 36V, 10ah, LiFePO4.

In the battery pack, I have opened the cover and I see 3 wires. One black and one red wires at +/-12 gauge and the other red wire is about 18 gauge. Which wire is positive and neutral? The Yike Bike AC charger uses 2 wires (positive and neutral) using the 3 plug connector. I assume I will ignore the smaller or 18 gauge red wire?

Btw, I have taken photos of the above. Please PM if you need photos. I have tried to insert the photo, but not successful in loading the photos.

Any recommendations to the above would be highly grateful. Thank you in advance.

 

[dnmun]

under the text box you will see 'upload attachment' click there and then find the file in your disk when it asks where, and then 'open' it and it will appear in the bottom of the message, then <add file> and you are done. i think that's the routine.

a 36V lifepo4 pack needs about 45V to balance with a ping signalab BMS.

 

[dogman dan]

Sounds to me like it will work ok. It will result in a slight undercharge if the battery pack you are going to buy comes with a charger set to a higher voltage.

The undercharge may mean your battery doesn't completely balance itself, but otherwise no problem. You could do like I used to, and use the yike charger for charging when out on the road, then put the battery on the charger it comes with overnight to balance when you get home. I used to just use cheap sla chargers at work, so I didn't beat up my more expensive lifepo4 charger carrying it around. Worked fine for years. I just had about a half mile less range when I used the lower voltage charger.

Use a voltmeter to determine the polarity of your wiring. check, put on your plugs if you need a plug change, then check again. I fried two chargers in a row mixing up wires when changing plugs.