Non EGO battery to power EGO Mower

  • 1
  • Question
  • Updated 2 days ago
  • Answered
  • (Edited)
I have an eBike battery (14s8p) 56V 15Ah 50Amp continuous BMS. Will I be able to power an EGO mower if I wire it to the + and - of the mower ? I am concerned about the 2 other pins T and D. Are they used at all while mowing ?
Photo of Remi

Remi

  • 102 Points 100 badge 2x thumb

Posted 2 years ago

  • 1
Photo of Jacob

Jacob

  • 63,682 Points 50k badge 2x thumb
Hehehehe. Only one of them is used. I think its D. Its what triggers the battery to display its current state. Soooo.... im like 90% sure you can.

Be careful of course.

Speaking of your bike battery..... what motor is it running?
Photo of Remi

Remi

  • 102 Points 100 badge 2x thumb
It is the mid-drive cyclone 3000W kit. Pictures of the beast here
https://endless-sphere.com/forums/vie...
Thanks for the reply.
Am I the only one thinking about putting a different battery on those things ??
Photo of Jacob

Jacob

  • 63,682 Points 50k badge 2x thumb
Im backwards. I want to put ego batteries on everything.

Like this... contraption

https://youtu.be/XGkd7TBO2a4
Photo of Jacob

Jacob

  • 63,682 Points 50k badge 2x thumb
Or mow-aahahaahaahah
Photo of David HD

David HD, Champion

  • 34,102 Points 20k badge 2x thumb
Photo of Blue Angel

Blue Angel, Champion

  • 177,608 Points 100k badge 2x thumb
DUDE that thing looks incredible!!! It looks more like something to get rid of your neighbor's dog than to cut grass! Awesome!
Photo of szwoopp

szwoopp, Champion

  • 82,554 Points 50k badge 2x thumb
That is awesome.  Nice work on getting it put together and running !
Photo of Sid Parish

Sid Parish

  • 1,392 Points 1k badge 2x thumb
I wouldn't do that if I were you I don't know if I'd be willing to take the chance it would tear up my mower
Photo of Jacob

Jacob

  • 63,682 Points 50k badge 2x thumb
So remy. I bet.. i bet that the blue wire is required. The blue wire connects to the controller board for all of the tools. I havent tried yet but i would bet money that it won't work.
Photo of mastag

mastag

  • 122 Points 100 badge 2x thumb
Hello, so has anyone actually tried running a non-Ego battery in an Ego mower? I bought a used Ego mower without battery for cheap. It's got 3 terminals. I make my own e-bike batteries and could make a battery for cheaper than the $350 7.5Ahr Ego battery. But I'm concerned that the mower will not function with that D terminal (blue wire) unplugged. (Regardless, I'll try it out within a couple weeks and report back.) -Ryan
Photo of Jacob

Jacob

  • 63,682 Points 50k badge 2x thumb
You will lose ramp up on the motor. Get a simple pwm board on eBay and make sure it has ramp up control. That way your amp draw won't be a billion amps. Plus you can now control the rpm of the motor.

Also put in a circuit breaker or fuse that is accessible.
Photo of mastag

mastag

  • 122 Points 100 badge 2x thumb
Jacob, thanks for your help.  In another thread, (https://community.egopowerplus.com/ego/topics/ego-20-mower-parts-all-parts) you said that a resistor (the white bar) may be for motor ramp up.  I didn't bypass that.  Do you know ... is this resistor or the ECM providing motor ramp up?  Also, there already appears to be a fuse installed on red wire near the battery.

Edit to add:  The wiring on my mower looks identical to the photos in the other thread, except there is a fuse on the red battery lead and that green donut (filter?) is not there.
(Edited)
Photo of Jacob

Jacob

  • 63,682 Points 50k badge 2x thumb
That resistor is actually to assist in braking the motor. When the bail handle is released, the motor POS and neg are connected together causing braking. The resistor makes it so it doesn't lock up hard
Photo of mastag

mastag

  • 122 Points 100 badge 2x thumb
Jacob, got any recommendations for a pwm board? I don't know anything about those. Without one, my battery is going into protect mode when I try to start it. Probably due to the high starting amps of the motor you speak of.
Photo of Jacob

Jacob

  • 63,682 Points 50k badge 2x thumb
I use
https://www.basicmicro.com controllers. 60v . They are expensive however they have units with full PLCs in them.

Otherwise eBay. But all the cheap ones on ebay will fail you cuz they are junk. But they also aren't 220.00$ USD

https://rover.ebay.com/rover/0/0/0?mp...