Making a conversion J1772 / IEC 62196 capable

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jonescg
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Making a conversion J1772 / IEC 62196 capable

Post by jonescg » Thu, 14 Jun 2018, 11:57

Hi Everyone,

Conversions are still happening, and for as long as we're allowed to, we will continue to build them. But being able to use a public charger would be lovely. I'd really like this post to be a go-to source for wiring diagrams and circuits for making sure your conversion is able to plug into a Type-2 public charge point and being smart enough to turn the charging power down by itself so it doesn't trip the breakers. This may mean carrying a special EVSE with you in the car, but in any case, how do you make the car compliant?

This is the standard Type-2 connection system:
Type_2_M&F_Pinout_wiki.JPG
Type_2_M&F_Pinout_wiki.JPG (26.42 KiB) Viewed 578 times

Where the female plug on the left is the public charger, and the male socket on the right is what's on the side of your converted car.

This image pops up in searches indicating what is needed on the vehicle side, however it doesn't have what is required to turn the power of the on-board charger down.
J1772-1.jpg
J1772-1.jpg (48.25 KiB) Viewed 578 times

Are these values consistent with the needs of a 7 kW onboard charger? How about a 3-phase, 22 kW charger setup? I know the TC chargers are able to be dialled down using resistors on the Enable pin, and they can be modified using CAN. What's the best solution here?
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Re: Making a conversion J1772 / IEC 62196 capable

Post by reecho » Thu, 14 Jun 2018, 12:57

You could use a resistor across a multi turn switch and command the charger that way to reduce current, but the risk there is that if a 10A EVSE is plugged in and the switch was set to 32A you will have one roasted EVSE in a matter of minutes.

There is something like this from Thunderstruck EV, which will command reduced current from the charger via CAN... http://www.thunderstruck-ev.com/evcc-ch ... oller.html

The best solution is to convince the supplier of your BMS to include it in his product... :-)

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Re: Making a conversion J1772 / IEC 62196 capable

Post by jonescg » Thu, 14 Jun 2018, 13:21

reecho wrote:
Thu, 14 Jun 2018, 12:57

The best solution is to convince the supplier of your BMS to include it in his product... :-)
Paging @zeva :D
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Re: Making a conversion J1772 / IEC 62196 capable

Post by coulomb » Fri, 15 Jun 2018, 07:33

Or this sort of thing, which is more DIY:

Image

http://www.evwest.com/catalog/product_i ... cts_id=107
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Re: Making a conversion J1772 / IEC 62196 capable

Post by jonescg » Fri, 15 Jun 2018, 09:51

That's what I had in mind - thanks Mike. I assume all this does is allows the charge point contactor to close and commence charging, but has no means to change the power output of the charger? Which is an acceptable compromise IMO.
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Re: Making a conversion J1772 / IEC 62196 capable

Post by reecho » Fri, 15 Jun 2018, 11:01

coulomb wrote:
Fri, 15 Jun 2018, 07:33
Or this sort of thing, which is more DIY:

Image

http://www.evwest.com/catalog/product_i ... cts_id=107
That device will allow basic comms with J1772 compliant stations, but it has no means for PWM charge rate control. You can get away with a 882 ohm resistor and a 1N4148 diode if you wan to fool chargers.

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Re: Making a conversion J1772 / IEC 62196 capable

Post by jonescg » Fri, 15 Jun 2018, 12:22

Would that work with the Type-2 connector as well? Given that it doesn't have a switch on the handset?
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Re: Making a conversion J1772 / IEC 62196 capable

Post by Jeff Owen » Fri, 15 Jun 2018, 16:51

reecho wrote:
Fri, 15 Jun 2018, 11:01
You can get away with a 882 ohm resistor and a 1N4148 diode if you wan to fool chargers.
You can fool some of the EVSEs with an equivalent resistor, but you need both resistors and a switch to fool the rest of them. They are also required for conversions to use Tesla EVSEs.

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Re: Making a conversion J1772 / IEC 62196 capable

Post by Bryce » Mon, 18 Jun 2018, 05:02

Orion BMS has J1772 comms option.
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Re: Making a conversion J1772 / IEC 62196 capable

Post by reecho » Mon, 18 Jun 2018, 15:26

jonescg wrote:
Fri, 15 Jun 2018, 12:22
Would that work with the Type-2 connector as well? Given that it doesn't have a switch on the handset?
Indeedly doo...

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