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Discussion Starter · #1 ·
Bolt is coming out with optional SAE J1772 DC (Combo) fast charging adapter that is the least popular in the USA at this time.
Nissan Leaf CHAdeMO DC fast charging stations are more popular that SAE combo adapters.
Tesla has their own DC charging plug / protocol and, from my point of view, Tesla has the best fast charging infrastructure at this time; However, only Tesla's can access it at this time.
Tesla already created CHAdeMO to Tesla Adapter that can be bought for $500.
I would love to see Chevy engineering CHAdeMO to SAE J1772 DC (Combo) adapter and sell it for $500 or so a piece. From engineering point of view - there is not much to it: need 1x CHAdeMO female, 1x SAE combo male adapter and a $20 embedded board to bridge the communications protocol, with some software work. Charging protocol ICD's are public.
This would sure expand fast charging station availability for Bolts and Spark EVs and BMW electrics.
If any Chevy or LG engineers or marketing people are reading this, I hope you take and run with this idea :cool:.
 

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The SAE CCS DC fast charging standard is on the Bolt EV and all new worldwide BEVs, since the CHAdeMO is only accepted as a standard for the Nissan Leaf. So it is logical to add the SAE CCS to all present CHAdeMO stations, instead of just an adapter.
 

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I think this would be encouraging the CHAdeMO charger network, which I doubt that GM is interested in expanding. GM is pretty much committed to the SAE standards, which is what they build into their vehicles. Maybe a third party might be interested in marketing an adapter for sale or rental, but it would be a pretty small customer base.

Tesla really has no choice but to provide adapters as they only sell BEVs and without the expanded infrastructure they would struggle to develop their products. Yes they are building a SC network, but they still need to be able to utilize the other networks to keep from stranding their owners. Particularly since they decided to go it alone with their plug interface - still a bad idea in my mind.

VIN # B0985
 

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Is that even possible? I mean besides making an adapter that physically fits into a Chademo plug, aren't there other issues that need to be addressed in order for a CCS-equipped EV to use a Chademo charging unit?
 

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Is that even possible? I mean besides making an adapter that physically fits into a Chademo plug, aren't there other issues that need to be addressed in order for a CCS-equipped EV to use a Chademo charging unit?
If you have full specifications for both standards on hand, I don't even think it'll be that hard. In both cases, the charger is providing DC on two wires at a voltage specified by the car for the important part. The rest is just the communications protocol - making the car's requests understandable to the charger and vice versa.

I'm not sure the "$20 chip and some software" description is adequate, but it should be fairly easy to do for any company with real engineering capability and possession of both sets of standard descriptions.
 

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If you have full specifications for both standards on hand, I don't even think it'll be that hard. In both cases, the charger is providing DC on two wires at a voltage specified by the car for the important part. The rest is just the communications protocol - making the car's requests understandable to the charger and vice versa.

I'm not sure the "$20 chip and some software" description is adequate, but it should be fairly easy to do for any company with real engineering capability and possession of both sets of standard descriptions.
I'm surprised no one has come out with one yet. I saw a kickstarter for a Tesla plug-to-J1772 adapter, but it seems it has been put on hold.
 

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Something of a non-issue in California. The CHAdeMO chargers are largely being converted to include CCS charging, and all the new chargers -- and there are many of these -- are dual chargers. The big problem is getting the power to the chargers and then having the chargers convert the AC to DC. Supporting CHAdeMO and CCS is a piece of cake.

I'm surprised no one has come out with one yet. I saw a kickstarter for a Tesla plug-to-J1772 adapter, but it seems it has been put on hold.
The adapters are for the Tesla AC destination chargers. I've seen a couple of BMW i3s plugged in so there has to be an adapter around. Usually the destination EVSE also have a J1772 240v charger as well, so perhaps there isn't a great demand for the adapter. That might change as the Bolt EV and other 200 mile range BEVs show up. Even at 6.6 kW you can add 20 miles per hour. On the road that's too slow but the destination chargers are usually at hotels where you'd be parked for at least eight hours.
 

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The SAE CCS DC fast charging standard is on the Bolt EV and all new worldwide BEVs, since the CHAdeMO is only accepted as a standard for the Nissan Leaf. So it is logical to add the SAE CCS to all present CHAdeMO stations, instead of just an adapter.
Soul EV too. And if GM ever wants to sell the Bolt EV in Japan, they will need a CHAdeMO capability.

At the Drive Electric event in Cupertino last fall, I had a long discussion with Tony Williams about it. (Tony dislikes CCS for a variety of reasons. Just ask him. Then be prepared for a diatribe...) He said just building the molds for the adapter would be very expensive. Even figuring you could sell a few hundred of them, they would still cost north of $1k each. In the meantime, most of the new DC charging sites - outside of dealer parking lots at least - support both standards with two different cables.
 

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I saw a kickstarter for a Tesla plug-to-J1772 adapter, but it seems it has been put on hold.
https://jdapter.quickchargepower.com/ That one's easy because the Tesla protocol is essentially identical to the J1772 protocol. It's a passive straight-through adapter with no brains whatsoever.

From engineering point of view - there is not much to it: need 1x CHAdeMO female, 1x SAE combo male adapter and a $20 embedded board to bridge the communications protocol, with some software work.
It took Years for Tesla to come out with their adapter. CHAdeMO is evidently a real pain in the ass as it is basically Leaf-centric. It's my understanding that the Tesla CHAdeMO adapter basically emulates a Leaf from the charger's point of view.

CHAdeMO is the next Betamax or HD-DVD.

http://www.plugincars.com/why-chademo-death-row-europe-128001.html
 

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I saw a kickstarter for a Tesla plug-to-J1772 adapter, but it seems it has been put on hold.
I've been following that too. Sent them my email. If I could buy a TSL-02 Inlet Jack, I'd build one myself. Yes, it's just a pass-through. There's been a few Tesla inlet cable harness assemblies on Ebay, but for the $, I don't need it that bad. ( obviously I don't NEED it at all, but would be a cool adapter to have for some hotels).
 

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Discussion Starter · #12 ·
jdapter looks great. What is Tesla stance on letting non-Tesla's juice at at their stalls? I would be more than willing to pay $0.5/kwhr to get some fast Tesla electrons into my Spark EV :).

OpenEVSE EV charger has source code for J1772 posted. That is integrating the AC side only - but it should not be hard to add fast charging side. BTW - OpenEVSE is a great charger developed and assembled in USA by a fellow engineer.
https://github.com/lincomatic/open_evse




https://jdapter.quickchargepower.com/ That one's easy because the Tesla protocol is essentially identical to the J1772 protocol. It's a passive straight-through adapter with no brains whatsoever.

It took Years for Tesla to come out with their adapter. CHAdeMO is evidently a real pain in the ass as it is basically Leaf-centric. It's my understanding that the Tesla CHAdeMO adapter basically emulates a Leaf from the charger's point of view.

CHAdeMO is the next Betamax or HD-DVD.

http://www.plugincars.com/why-chademo-death-row-europe-128001.html
 

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If you have full specifications for both standards on hand, I don't even think it'll be that hard. In both cases, the charger is providing DC on two wires at a voltage specified by the car for the important part. The rest is just the communications protocol - making the car's requests understandable to the charger and vice versa.

I'm not sure the "$20 chip and some software" description is adequate, but it should be fairly easy to do for any company with real engineering capability and possession of both sets of standard descriptions.
It would be similar in scope and effort to the CHAdeMO adapter that Tesla created. That project took awhile to do and the final product costs $450.
 

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J1772 is a pretty simple state machine logic for negotiating with the car. And it doesn't control voltage or current once energized. The charge controller is in the car. ChadeMo and CCS, on the other hand, directly charge the battery, controlling both voltage and current, and are much more complex and expensive (the outside the car part). But given a ChadeMo station, agree, wouldn't be that difficult to make a ChadeMo to CCS. The question is, is there a need? I might throw $100-$200 at a Tesla L2 to J1772 adapter, but not $200-$500 at a ChadeMo to CCS.
 

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jdapter looks great. What is Tesla stance on letting non-Tesla's juice at at their stalls? I would be more than willing to pay $0.5/kwhr to get some fast Tesla electrons into my Spark EV :).

OpenEVSE EV charger has source code for J1772 posted. That is integrating the AC side only - but it should not be hard to add fast charging side. BTW - OpenEVSE is a great charger developed and assembled in USA by a fellow engineer.
https://github.com/lincomatic/open_evse
Tesla's Supercharger is a whole different animal. It's a completely different protocol than J1772. It uses the same physical socket but there are internal contactors that disconnect the Tesla's on board charger and connect the socket straight into the battery pack.
Even if you could overcome the technical hurdles, Supercharging involves VIN verification with the mothership.

The point of the jdapter is to use a Tesla HPWC just like any other L2 station (i.e. Clipper Creek) at pretty much the same rate
 

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Has anyone seen one of these adapters on the market in the year since this thread last had a post and the Bolt became available?
 
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