DIYBMS v4

fisht99 · 2021-01-31T10:46:54.588Z

When flashing the latest firmware, do we still need to flash the system image “diybms_controller_filesystemimage_espressif8266_esp8266_d1mini.bin” ? when i tried to flash it it gave an error.

stuart · 2021-02-01T09:54:36.186Z

4 posts were split to a new topic: Module temperature in freezing conditions

stuart · 2021-01-31T16:13:01.408Z

fisht99:

When flashing the latest firmware, do we still need to flash the system image “diybms_controller_filesystemimage_espressif8266_esp8266_d1mini.bin” ? when i tried to flash it it gave an error.

No, not with the latest version for ESP8266.

stuart · 2021-01-31T16:14:49.972Z

Jon_Coop:

ive tried the reset fuse option in platformIO but not sure if i tried reflashing afterwards.

Hi @Jon_Coop, if you follow the instructions to program from here [diyBMSv4Code/README.md at master · stuartpittaway/diyBMSv4Code · GitHub] you don’t use Platformio at all.

Just download the “Compiled_Firmware_2021-01-25-14-42.zip” file and follow the above instructions.

Nico_F · 2021-01-31T21:55:44.132Z

Hi
I have place an order to jlpcb for leaf module
I have see it is AZ432ANTR for D1 (nice )

I have a doubt about what revision need to flash v4.00 or v4.21?

Thanks for this information

stuart · 2021-02-01T09:55:40.912Z

2 posts were split to a new topic: Can’t get the batteries to appear in the browser

stuart · 2021-02-01T09:52:55.835Z

Nico_F:

I have a doubt about what revision need to flash v4.00 or v4.21?

If its using the 432 chip, then v4.21 will be the one to use, if its using the LM4040 chip, v4.00.

fisht99 · 2021-02-01T09:59:13.368Z

Thanks Stuart

Nico_F · 2021-02-01T10:02:26.708Z

Hi Stuart
Thanks a lot
it is the 432 from last bom download 1 week ago on github

I think you have update the schematic but not the revision, so it is confused for me, maybe add v421 on this last leaf pcb can help to avoid mistake in firmware selection?

have a nice day

Nico_F · 2021-02-01T10:11:19.112Z

@GeorgeBoudreau
Hi
Please can you confirm this point on shematic difference between leaf and v421?
Why there is a C2 capacitor on leaf pcb and not on v421 pcb?
They use 432 on both schematic.
I think C2 is required only for LM4040 for better stability, but is it ok to have it with 432 on leaf pcb ?
thanks

hepike · 2021-02-01T17:55:57.607Z

Hi @stuart,

I saw the latest update video on yt and I was wondering if the controller board can handle 55 cell module in series or not? Currently I have 55 cell modul from V3 board and I want to upgrade my system.

Thanks,
Adam.

inya · 2021-02-01T18:34:33.752Z

How to get new controller build files? I’m so waiting it to build 72 cell battery at one controller

stuart · 2021-02-01T21:07:18.636Z

They have not yet been released, as I’m waiting for the final test boards to arrive.

The existing design copes with up to 100 modules though

stuart · 2021-02-01T21:08:34.175Z

Hi, what chemistry is that, what voltage are you running at?

hepike · 2021-02-01T21:59:33.630Z

18650 Li-ion 198VDC nominal. 55S20P

inya · 2021-02-01T22:04:55.213Z

But currently supported only 64 modules, 4x16. Or im wrong?

stuart · 2021-02-02T10:34:42.828Z

2 posts were split to a new topic: Controller shows 60000 ms for the round trip

donnib · 2021-02-02T10:04:48.781Z

Hello,
I finally made my system after working on it for a year or so, i need some help to setup the BMS for LiFePo4, anybody using LiFePo4 chemistry which can shed some light on the voltage you have used for bypass and in the rules ?

Here are some pictures of my system (consists of 16S LifePo4 160Ah + Victron Inverter + Victron MPPT + Victron Shunt and a Fronius Inverter) :

Work in progress:

IMG_83544032×3024 2.17 MB

IMG_83952016×1512 902 KB

Final result :

IMG_84363024×4032 2.78 MB

IMG_84384032×3024 2.36 MB

IMG_84413024×4032 2.17 MB

Current view of modules :

image2412×1286 275 KB

Current settings and these i don’t know if they are correct, this is what i need help with :

image1062×172 10.2 KB

image962×174 8.98 KB

Victron view at the moment

image958×554 64.6 KB

stuart · 2021-02-02T10:30:33.219Z

inya:

But currently supported only 64 modules, 4x16. Or im wrong?

Up to 32 in series and up to 16 in parallel - total of 100 cells, so you could have 32S x3P or 14S7P etc.

Nico_F · 2021-02-02T12:44:16.011Z

sorry to boring you with that, anyone have an idea about this C2 capacitor close to 432 chip in leaf pcb but not on stuart v421? can stay in place or better to remove it?
My leaf board are under production and i have received my big set of attiny 841