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J1939 EV CAN definitions
Posted: Sun May 25, 2025 8:53 am
by levelnull
Hi everyone,
i am looking for the CAN definitions of the EV related parameters in J1939.
There are several available, like
- min and max cell voltage
packV
packCurrent
SOC
SOH
etc
Maybe anyone here came across these definitions?
Thanks,
Marco
Re: J1939 EV CAN definitions
Posted: Sun May 25, 2025 9:47 am
by tom91
J1939 standard is pay to play. You need to pay for a license to obtain a J1939 dbc that explains the message formats
https://www.csselectronics.com/pages/j1 ... o-tutorial
Re: J1939 EV CAN definitions
Posted: Sun May 25, 2025 1:56 pm
by levelnull
Yep I know, but maybe theres some info out there.
There are several repos on GitHub, but they dont include the EV related messages.
Re: J1939 EV CAN definitions
Posted: Sun May 25, 2025 5:38 pm
by uhi22
Re: J1939 EV CAN definitions
Posted: Sun May 25, 2025 6:51 pm
by levelnull
thats a nice find, thanks!
Will try to construct some DBC out of it and see if it fits
Re: J1939 EV CAN definitions
Posted: Sun May 25, 2025 8:17 pm
by uhi22
Which kind of EV is using J1939?
Re: J1939 EV CAN definitions
Posted: Wed May 28, 2025 4:12 pm
by levelnull
No idea
I am trying to use a Teltonika FMC650 device as a remote gateway to my own EV conversion.
Used a PI before, but really wanted to save some energy, as the pi uses a lot.
The FMC650 seemed interesting, but its very immature:
- Config tool doesn't work reliable at all
manual CAN messages are not being sent
encoding isn't documented very well
etc
Because the manual CAN definitions the device should be able to send don't work, my idea was to implement the J1939 protocol (which the teltonika uses out of the box) in my VCU, but I dont think spending > 300 Euro is worth it.
The above mentioned PDF unfortunately doesn't match what the Teltonika expects.