Ebike Charger Hack

Hey guys,
I need your advice on hacking my charger.

I have already cut off the plug as I was going to use a xt60 connecterto charge the batteries I make, however I decided to go with the original connecter the charger came with.

So now I have a break in the lead with xt60 connector joining original plug back on ( see photos below you will see what I mean).

This got me thinking it would be nice to have a high voltage disconnect of some kind, to prevent batteries charging to 100%, thus hopefully prolonging battery life.

So, what could i use do you think that I could wire into the lead. I could add a wattmeter but I dont have one tthat disconnects.

Any ideas appreciated??

Something like this? There are dozens maybe hundreds of slightly different ones..

https://www.amazon.com/DROK-Compara...=1492132013&sr=8-6&keywords=comparator+module

Elmo said:

Something like this? There are dozens maybe hundreds of slightly different ones..

https://www.amazon.com/DROK-Compara...=1492132013&sr=8-6&keywords=comparator+module

Click to expand...

Yep I could use one of those, I was looking for something enclosed, I could make a little case for it.

Any other options?? I'll keep looking if not one of those modules will do the job I'm sure

Here's my all in one mod, 42V 2A ebike charger inside, it can also be run off a set of batteries to charge another set of batteries







DC 6-55V to 0-50V 5A Step Down Stabilized Power Supply Constant Voltage Current Buck Power Converter Power Supply Adjustable Modulehttps://www.amazon.com/dp/B01LWXAC5E/ref=cm_sw_r_cp_apa_dGHozbG0W55ED

I use three server power supplies in series to give my 36v. Then I hook up one of these cheap DC-DC boost converters from aliexpress to charge up the pack that way.

https://www.aliexpress.com/store/pr...meter-120V10A-charger/409890_32661465742.html

My battery pack is 12S8P and it is made of samsung 82A cells rated for a max CDR of 5.6A.