DIY Electric Car Forums banner
1 - 4 of 61 Posts

· Registered
Joined
·
80 Posts
CHAdeMO is the de facto DC fast charging standard for DIYers right now because it is controlled through CAN.

I'm also interested in installing a CCS fast charge option in an EV that previously only had AC. It is still unclear to me how CCS equipped EVs store and communicate the DIN SPEC 70121 and ISO/IEC 15118 standards to the DC fast charger. It could be in the onboard AC charger, in the BMS, or in the ???.

Orion was mentioning that they were looking into supporting the CCS standard (that was on their website, but I can't remember where at this point); however, it's possible that CCS fast charging can be supported even without the BMS or onboard charger having that capability. Tesla has been offering a CCS adapter for their European Model S and X owners, and part of the adapter package is a communication box that is installed under the rear seat. It's possible that a third-party could replicate that type of hardware, which acts as a bridge between the CCS port (comm line) and the BMS. Basically, a PLC to CAN translator.
 

· Registered
Joined
·
80 Posts
CHAdeMO is pretty much dead for new electric vehicles in North America at this point; however, it is likely to be supported by public charging providers for a long time into the future.

Even for DIYers, it's going to be necessary to make the transition to CCS, so off-the-shelf CCS conversion solutions can't come soon enough.
 

· Registered
Joined
·
80 Posts
I have some experience with CCS. I have used one such module from Auronik (they were bought by Akka a while back) but it worked terribly and the price was about 1500 EUR for <10 pcs.
Supposed one could make a CCS module, how much would you guys be willing to pay for one? Would you be open to supporting a crowdsourcing project for it?
It seems like that would be something that's hard to put a value on. It's essentially the same thing that Tesla is providing to their Model S/X owners in Europe (plus the CCS plug adapter), and I believe they're charging less than €200. Similarly, the Power Line Communication module for the Chevrolet Bolt EV is only about $150.

How much more would a crowd-sourced version cost?
 

· Registered
Joined
·
80 Posts
Well there are a few key components:
1. GreenPHY PLC, cheapest one I found is this: PEV (Electro Vehicle) side PLC / Home Plug Green Phy communication Module for ISO/IEC15118 / DIN 70121 / SAE J2847/2 51 EUR
2. Singleboard computer capable of running ISO15118 stack, perhaps Beaglebone Black since it includes two CAN interfaces https://hr.mouser.com/ProductDetail/BeagleBoard-by-Seeed-Studio/102110420?qs=vmHwEFxEFR8FZOWBwz8ZDA== 40 EUR
3. Additional PCB with SAEJ1772 signaling and sampling, power suppply, etc electronics approx 50 EUR

so we are talking about 150 EUR just for the parts.

In addition you need:
1. At least two more high current DC contactors for connecting the CCS lines to battery pack (Tyco KiloVAC). around 200 EUR
2. High voltage, galvanically isolated voltage measuring input around 50 EUR
3. CCS socket, around 200-300 EUR.

As for the software, there is open source implementation in JAVA, RISE V2G – V2G Clarity, but it needs to be ported to the actual hardware, mostly by implementing calls to access J1772 CP and PP states and controling them. Also TCP/IP communication over PLC needs to be implemented.

I think 250-300 EUR just for the PLC module could be possible.
Yes, I think the best bet would be focusing solely on the PLC module. The CCS socket will be unique to the end user because Europe and North America use a different socket, and some people might already have the contactors (e.g., from a previous CHAdeMO conversion). Worst case, people buy the parts they need to complete the system separately, or we could set up a group buy for Tycos, sockets, cables, etc. if it makes sense.

I might pick up a spare Chevy Bolt EV Power Line Communication module for about $150 just to look at it and see how it works and is put together. It might only speak the DIN SPEC 70121 standard, though, which could be limiting.
 
1 - 4 of 61 Posts
Top