CAN connection between bike and charger

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bennymic

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Has anyone tried to reverse engineer it? If it's standard like NACS you could probably just wire up an adapter and charge from tesla chargers. My delivery date is not till August otherwise I would look into it...
 
I thought about reverse engineering it, but first I'm onto something else, a lighter and more portable charger.
I worked on something similar with some contacts in my activity of tuning cars and swapping engines/ECUs with different CANbus protocols.
 
bennymic said:
If it's standard like NACS you could probably just wire up an adapter and charge from tesla chargers.
Click to expand...
While an automotive DC charger would be a natural choice, the connectors on those are pretty big already. So even if you figure out the CAN part, the adapter and cable would still be quite bulky as I don't think you could take a lot of short cuts with the voltage and amperage involved.

Michael
 
The part that sticks into the vehicle is a larger "diameter". That determines the space required on the vehicle.
 
0DF3E9C6-6F3B-45C7-8BC0-F4C126BAD063.jpeg
On the charger cable Pin A=CanL Pin B = CanH
96CDC048-6679-4B5F-AE02-5F24534DA208.jpeg
On the signal Cable Pin A=CanL Pin B = CanH
I have attached the Can 1000 Protocol.

I found this faultfinding the charger, not reverse engineering it.
I did find a resistor across the CanL/CanH at the signal plug, so this may be a dedicated Can just for the charge cct.
 

Attachments

As of the last fw update on the stark, we can now charge at 6,6kw. I was thinking of putting 2 EVPT23-32010 chargers in paralel. Would this be possible, and if so how about the CAN connection ?
 
The 6,6kW option was offered (temporarily for now) by Stark Future at the Gotland Grand National on dedicated chargers for Varg racers - the feature has been rolled out to all apps, despite 6,6kW charging not being available anywhere else.
Discussion starts here Stark mobile charger is out !
 
in CAN topology every client has a unique ID. and every charger has the same ID.
You generally cannot have two devices with identical CAN IDs on the same CAN bus because IDs are for message arbitration, causing conflicts and data loss.
so… NOPE from the CAN point of view.
 
Stark Future announced in a Q&A that they will introduce 6.6kW charging for bikes >MX 1.2
There's no word how this will be done, and if a 6.6kW charger will look anything like those used in the Stark Future tent on the Gotland Grand National. If it does, it will be bulky and not very portable in terms of transporting it on the bike.

Also, Stark will probably not release a feature to parallel two 3.3kW chargers. I guess there will be quite a couple of Stark owners that add a portable charger to their charging stand, or even buy two portable chargers. A plug and play fast charger kit would be a nice option.

A chat with an LLM near me revealed that a technical solution could be
a) hardware that adapts two charger cables into one while keeping each CAN channel separate
b) a microcontroller -for example an ESP32- that pretends to be a 6.6kW charger to the bike and controls each connected 3.3 charger via a separate CAN bus
c) software that entertains each of the three CAN buses with appropriate messages

Question to the software/electronics boffins: could this be a viable DIY project?
 
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