J1772 Pilot & Blink Chargers

dhrivnak · May 15, 2013

I have built a little J1772 to NEMA 14-50 adapter box so if I am ICED I have the cord length to still plug in with my UMC.

I simulate the pilot signal with a diode going through a 2.73K resistor and then a switch with a 1.3K resistor to show the car is connected. The box works on the Nissan, Chevy and on our parking garage J1772 stations but will not work on BLINK charging stations. Whenever I connect to a BLINK the BLINK station show a fault that is resetable.

The problem is most charging stations in Tennessee are BLINK. I have verified the resistance drops properly from the diode to ground but my volt meter shows a lot of resistance on the IN4003 diode. I measure infinity in one direction and 7K the other direction. I seem to remember there is a breakdown resistance so I am assuming my voltmeter does not have the voltage to properly measure through the diode. I did try another diode with similar results.

Does anyone have any idea why it would work on 3 out of 4 stations? Has anyone tried to connect anything than a standard J1772 to a BLINK station?

Here is the wiring diagram I followed and it seems to be limilar to others I have found.
Google Image Result for http://4.bp.blogspot.com/_i_c2BM_uBw4/TR9mOulEE5I/AAAAAAAACDs/8dVMihzK9JA/s1600/J1772-1.jpg

Thank you

Babylonfive · May 15, 2013

Neat idea. Too bad you can't simply buy a J1772 extension cord.

Puyallup Bill · May 15, 2013

Babylonfive said:
Neat idea. Too bad you can't simply buy a J1772 extension cord.

For about $315, you can make a 8 meter 70 Amp extension.
http://www.tucsonev.com/
Or, I understand they will fabricate it, but no doubt at much higher cost.

TXjak · May 16, 2013

Babylonfive said:
Neat idea. Too bad you can't simply buy a J1772 extension cord.

Or a J1772 adapter for the wall end of the UMC.

There are also these: http://modularevpower.com/Sales_J1772_to_NEMA_14-50_Adapters.htm

- - - Updated - - -

Puyallup Bill said:
For about $315, you can make a 8 meter 70 Amp extension.
http://www.tucsonev.com/
Or, I understand they will fabricate it, but no doubt at much higher cost.

The 10 ft one looks to be $280, complete. Limited to 32A, however.

Presumably, if there was an adapter for the wall end of the UMC, you could connect to a 70A charging station and set the Model S to draw up to 40 amps.

David, looks like we might need a way to lock the wall end of the UMC to such an adapter as well. :biggrin:

dhrivnak · May 17, 2013

I think I found the problem. I had a bad switch, thanks Radio Shack!

TonyWilliams · May 17, 2013

TXjak said:
Or a J1772 adapter for the wall end of the UMC.

There are also these: http://modularevpower.com/Sales_J1772_to_NEMA_14-50_Adapters.htm

It couldn't be easier to use the Modular EV Power unit from a J1772 plug to a NEMA 14-50, then a common 6/3 extension cord as long as you need, then plug in the UMC into the other end of the extension cord with the NEMA 14-50.

Now, you get full 40 amps (if available from the J1772... Most are only 30 amps... CAUTION) into the Tesla car.

TXjak · May 18, 2013

TonyWilliams said:
It couldn't be easier to use the Modular EV Power unit from a J1772 plug to a NEMA 14-50, then a common 6/3 extension cord as long as you need, then plug in the UMC into the other end of the extension cord with the NEMA 14-50.

Now, you get full 40 amps (if available from the J1772... Most are only 30 amps... CAUTION) into the Tesla car.

Yes.

I would prefer a more compact and less vulnerable solution, however, that's why it seems like replacing the UMC 14-50 adapter with a J1772 adapter would take the 14-50 out of the picture and be neater and possibly more secure.

Since Tesla offers adapters for both ends of the UMC, it wouldn't seem too hard for them to come up with a $45 J1772 adapter for the input (wall) side to replace the 14-50 adapter.

EVFAN · Oct 17, 2013

Hi,

I have tried the same way in pic shown in the link. but it's now work for the pilot signal simulation. Could you please tell me how you did if passable post pic of yours

Thx.

dhrivnak · Oct 17, 2013

You may want to run out a pilot wire so you can test the voltage. I had to add an extra resistor. It should be 12v initially, then 9v when connected and 6v when you throw the switch. It seems like the manufacturers vary from the standard.

EVFAN · Oct 17, 2013

Thank you some much for your reply. I am having nissan leaf. I used one 1N4004 diode , 1.3k and 2.7k resistor. Which extra resistor did you used . Please post the diagram how the connect the extra resistor.

TonyWilliams · Oct 18, 2013

This thread may give you ideas:

How to make a 30 amp J1772 extension cord for public charging

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J1772 Pilot & Blink Chargers

dhrivnak

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Babylonfive

Power12

Puyallup Bill

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TXjak

Owner/Investor/Advocate

dhrivnak

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TonyWilliams

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TXjak

Owner/Investor/Advocate

EVFAN

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dhrivnak

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EVFAN

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TonyWilliams

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