Golf cart headway pack

[Bbbbrass]

Finally finished my pack, using battery hookup “super beast” modules. These packs are 24V each, using 6P8S Headway LiPO4 cells. Resulting pack is 96 cells, total of 48Ah 48V nominal. Using a JBD 300A BMS, giving me Bluetooth monitoring, low temp cut off, and all necessary protections. Club Car ERIC charger using profile 269. Pack runs into bus bars, then has 12V converter for lights and accessories. Has stock Curtis controller with 4GA wires, Eaton ACK-175A fuse. Now I have a nice storage compartment under the seat also!

 

[jberger]

I don't know how I missed this thread when it was originally posted.
I'm really interested in learning more about your build, what you learned, what you'd recommend etc.
I want to do this on a 48v RXV cart with a Navitas 600a controller.

 

[DThames]

OP, can you post a link to the BMS vendor?

I don't know how I missed this thread when it was originally posted.
I'm really interested in learning more about your build, what you learned, what you'd recommend etc.
I want to do this on a 48v RXV cart with a Navitas 600a controller.

That is a lot of amps! Planning to tow something?

 

[Bbbbrass]

I don't know how I missed this thread when it was originally posted.
I'm really interested in learning more about your build, what you learned, what you'd recommend etc.
I want to do this on a 48v RXV cart with a Navitas 600a controller.

I posted my thread after you had yours up. I had made my purchases months earlier, but I didn't want to recommend before finishing and making sure it worked!

My biggest recommendation is to top balance the individual headway cells, and IR match them. Don't trust that the initial setup is well matched and balanced. If you use the original cases there is a lot of extra space above the cells. I was *barely* able to fit them in the battery compartment, but making a custom case would probably be better. Also, trim off the extra temp sensors and wires from the harness and shorten those balance leads. 48Ah is not a ton of range, but I can get about 10 miles running around the neighborhood on the stock 300A Curtiss controller.

Using some Bus Bars like these make it super easy to wire in an extra charger (I used the stock one with a new profile), a 12V step-down, or an emergency inverter. Don't forget fuses (the 175A fuse that came with the headway packs has been fine for me), and for sure upgrade your wiring to at least 4 gauge, but if you are going with a 600A controller I would go even larger.

 

[Bbbbrass]

OP, can you post a link to the BMS vendor?

That is a lot of amps! Planning to tow something?

Amps are more for acceleration generally....

Original link no longer for sale:

151.23US $ |Jbd Smart Bms Continuous Current 300a Automatic Identifica 7-20s With Built-in Bluetooth Free Ntc Lifepo4 Bms Board Peak 1000a - Battery Accessories & Charger Accessories - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

Original model, different vendor:

179.0US $ |jbd smart bms Programmable 7S~ 20S 200A 300A continuous discharge current smart bms for li ion lifepo4 battery pack| | - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

Possible replacement?

100.61US $ 30% OFF|Jbd Smart Bms 7s 8s 10s 12s 13s 14s 17s 18s 20s Built-in Bluetooth 200a 300a Balance Board 24v 36v 48v 60v 72v Liithium Battery - Battery Accessories & Charger Accessories - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

 

[Bbbbrass]

I don't know how I missed this thread when it was originally posted.
I'm really interested in learning more about your build, what you learned, what you'd recommend etc.
I want to do this on a 48v RXV cart with a Navitas 600a controller.

The other thing I learned, holy goodness is the swap worth it! Much faster acceleration, better performance going up hills, no more voltage sag sadness, lightweight helps everything (Thanks Colin Chapman), and I love my storage compartment under the seat. I got back half the cost of doing it by selling my old Pb batteries to another golf cart person whose batteries were totally dead, but you can also get a good amount from the scrap yard. don't ever do a core charge exchange!