2024 RXV Elite Dead Battery

[TheCartBoy]

Originally Posted by jimwang

Sorry, another question: does anyone know the dimensions of this battery?
or is there a manual for this battery?
i want to ues it for a different application, thanks!!

It's a proprietary closed system for ezgo only... That said I've replaced the BMS on the gen1 battery to make it usable elsewhere.

What's your project?

[jimwang]

Hi, your sharing is amazing.
I heard Gen2 incl. SDI 50G, 14S12P...
I just very curious about its dimension and cell... Is it possible??

I don't see any tear it down yet.
Maybe it's reliability and doesn't need repair XD

[nikoror]

Quick update: what I assumed was a relay clicking is actually the reverse buzzer which sounds like it’s trying to make a sound but just clicks. This is with the key in any position (even no key) and likely has something to do with the battery being drained all the way to 0v.
The fuse I assumed was blown is actually good. It has some kind of black sharpie check mark which I assumed was the magic smoke. It is labeled usb/pace fuse holder.

Battery disassembly is progressing slowly. They really don’t want you opening it 😂

Any ideas on next debugging step welcome. Applying power to controller terminals directly at 10A limiter maxes out the current limit. Seems quite wrong to me as controller sitting idle should be mA maybe? Maybe controller is fubar and that’s making the reverse buzzer be always on.

Thanks, nik

[nikoror]

Originally Posted by jimwang

I heard Gen2 incl. SDI 50G, 14S12P...
I just very curious about its dimension and cell... Is it possible??

I don't see any tear it down yet.
Maybe it's reliability and doesn't need repair XD

The case says 14s14p. Teardown coming soon possibly tonight.

[TheCartBoy]

10 amps on the controller idle only is way too high, possibly something shorted.

The Gen2 batt has 21700 Samsung cells and the cases are glued together, you will likely break the cases trying to open it. Be careful with whatever tool you are using, even a mostly discharged lithium cell if punctured will blow up in your face.

[nikoror]

Managed to pop the cover open. Had to use some garrote skills 🥷
But the cell pack itself seems glued to the bottom. Any ideas how to get it out?

[nikoror]

Here’s the battery cover removal video:
https://www.youtube.com/watch?v=UF24...0ga87clZrA93gv

[TheCartBoy]

Instead of trying to tear the cells out. Measure voltage on each cell bank. If they are all above 2.5v, this can be salvaged with a replacement BMS. Obviously won't work in this cart again, but can be repurposed for something else, solar, non-elite golf cart, etc.

[nikoror]

I don’t think there’s anything worth saving there. Measures 0.3v across the pack 🫣

[TheCartBoy]

Really? Double check your multimeter and measure points.

Not saying that isn't possible, but it would be very surprising. Like the PCB would have to have a defect that kept the cells discharging to 0.