openinverter forum

arber333 wrote: ↑Thu Nov 03, 2022 7:37 pm You could use modules in parallel and with BMS connected just by CAN bus. Use SimpBMS and wire your harness from the GTE wires.

But i use those cells in my sola array with JK BMS wired for 12S. Problem is not with BMS. Inverter requires minimum 48V to return back to battery, which is to much for 12S Liion. I would need 16S to keep battery at optimal charge/discharge states for my application. I already have a plan to use Mazda LiPo cells for that.

arthur8 wrote: ↑Thu Nov 03, 2022 7:54 pm Thanks for the help.

Looks good! But there is any alternative to SimpBMS? I found it a bit expensive where i live. It would cost more than i paid for the entire gte battery.

arber333 wrote: ↑Thu Nov 03, 2022 8:00 pm I am developing a similar modular board with cheaper ESP32 chip. You may try to contribute by porting Teenys code to ESP32.
viewtopic.php?t=2256

eee291 wrote: ↑Thu Nov 03, 2022 10:40 pm They puff after just one cycle, even at low c rate (from experience)
I managed to make some 14s blocks out of them but with metal welded box, still works today.

arthur8 wrote: ↑Thu Nov 03, 2022 7:54 pm Thanks for the help.

Looks good! But there is any alternative to SimpBMS? I found it a bit expensive where i live. It would cost more than i paid for the entire gte battery.

Alibro wrote: ↑Fri Nov 04, 2022 7:00 pm Sorry if I'm missing something here but for 14S couldn't you use an ebike BMS? The ANT BMS's are pretty good and allow you to monitor the pack via a mobile phone. Vorteck's VBMS software is only £10 and works great.

arthur8 wrote: ↑Fri Nov 04, 2022 7:27 pm Thanks for the help!

Yeah, i was thinking about using some external BMS. I was looking at the NEEY 4th generation. What do you think?

Actually i just need an balancer, i already have some arduino's monitoring my dc voltages for low/high voltage battery disconnect.

Alibro wrote: ↑Sun Nov 06, 2022 8:40 am I'm no expert in ebike BMS's so can't give proper advice but I've used a couple of cheap units from China and had no issues.
You could even try an active balancer to share the voltage across the pack rather than a passive BMS that just takes power from the highest cell.
Have a look through this thread
viewtopic.php?t=1603

arthur8 wrote: ↑Mon Nov 07, 2022 1:31 pm Friends,
Do you guys know what is the correct voltage for those lithium polymer cells from the golf gte?

Ive read that they are Lithium nickel manganese cobalt (NMC). And from what i've found they have a 3.7 V nominal voltage with a 4.2 V maximum while charging. The same as 18650. This is correct?

Thanks.

Alibro wrote: ↑Tue Nov 08, 2022 7:39 pm Is this the same as yours?
https://www.secondlife-evbatteries.com/ ... amsung-sdi

Bigpie wrote: ↑Tue Nov 08, 2022 8:43 pm I have 2 Golf GTE packs, I charge to 4.15v. You can run SimpBMS on a Teensy with just a can transceiver for the GTE modules, it'll monitor the voltages and balancing.

EV_Builder wrote: ↑Thu Jun 02, 2022 8:40 am In the small square section looks like some configuration to me?
Do you have closeup? What's printed on the small table?