Full disclosure, I work for Jack and I was one of the people to write chademo code for him for use on the car side to create our own aftermarket vehicle chademo.
He does have a CHAdeMO pedestal now. It is seems expensive but really isn't when you consider what other companies want for a 50kw pedestal. It fully supports using a solar array to charge a battery pack and then use that battery pack to charge a car. That sounds pretty close to what you are looking for. Perhaps it is a bit more expensive and high powered than you were after. Here's essentially how CHAdeMO works: The car and EVSE negotiate about the charging voltage and current. If the EVSE can handle what the car is requesting then it tells the car side OK. It then tests the contactors between them (the car side has these contactors) to make sure nothing is stuck. Once the parameters are verified and the electrical circuit has been tested to be safe then all contactors close the EVSE begins to provide the amount of current the car has requested. It will do this until the car says to quit charging, until the target voltage has been hit, or until an error happens (car requests an insane current, an isolation fault happens, CAN communication drops, etc). Essentially the CHAdeMO EVSE is a car controlled current source. The voltage just follows based on the current you requested. That's why it is important to tell the EVSE your target voltage. It's really the upper termination voltage used to prevent anything dumb from happening. In practice you should never reach that voltage. If the car says to provide 120A the EVSE will do it if it can. If the car says 10A it'll do it. The car is the boss. This means that the car's BMS is quite important because the EVSE will be perfectly happy to ram 100A at 500V to a 250V pack if you ask it to. Generally a CHAdeMO EVSE will be stable for packs between 250-500V. Some of them say they can go lower but results for that are not very promising at all. It's really best to count on good performance for 400v nominal packs. On Mon, Jul 18, 2016 at 9:13 AM, Robert Bruninga via EV <[email protected]> wrote: > So how does CHADEMO work? The car tells the charger what final voltage and > what max current, and the chademo then complies? > > What about BMS? Does the car's BMS handle everythig else? > > Bob > > On Sun, Jul 17, 2016 at 9:57 PM, paul dove via EV <[email protected]> wrote: > >> Yes but it was very expensive I was just saying it can be done >> >> Sent from my iPhone >> >> > On Jul 17, 2016, at 1:50 PM, John Lussmyer <[email protected]> >> wrote: >> > >> > On Sun Jul 17 09:58:38 PDT 2016 [email protected] said: >> >> Many vehicles already have HVDC charging capability it's called chademo >> standard. If you have 330VDC available you just need an interface that >> complies with chademo. jack Richard of EVTV has developed such a product or >> rather had the Chinese do it. It connect to HVDC and with chademo to the >> vehicle. >> > >> > Does that actually exist yet? last time I checked it didn't. (There >> were photos of it, but it wasn't available.) >> > >> > >> > >> > -- >> > >> > Tigers prowl and Dragons soar in my dreams... >> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ >> Please discuss EV drag racing at NEDRA ( >> http://groups.yahoo.com/group/NEDRA) >> >> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160718/866ad58a/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
