User avatar
garygid
Gold Member
Posts: 12465
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 3:35 am

The J1772-2010 Standard seems to require a switch in the "nozzle" as part of a "proper" Proximity circuit implementation.

Measure the Resistance of the nozzle's Proximity pin to the ground pin. It should be about 150 ohms normally, and about 480 (150 + 330) ohms while the "Release" lever is pressed.

The internal switch shorts across a 330 ohm resistor that is wired in series with a 150 ohm resistor.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

User avatar
LEAFer
Posts: 2647
Joined: Mon May 24, 2010 10:10 am
Delivery Date: 19 Jan 2011
Leaf Number: 000215
Location: Sacramento Area

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 9:35 am

How about trial-by-error on this one ... and I would check both the AV (L2) and the portable L1: while your LEAF is actively charging (sipping juice) ... without removing the J-plug from the charge port ... just push the button on the plug. What happens ?
2011 Silver SL+QC [Mfg: 11/2010] 36mo/15k LEASE
06Jun2013 Status [28.5 months][34,173 miles][11 bars]
Lost CapacityBar 6/6/13 @34,173 miles while in LEAF Battery Monitor: 83.41%, 71.4F (avg); cool overnight;

User avatar
Spies
Posts: 837
Joined: Sat Jul 31, 2010 8:22 am
Delivery Date: 10 Jan 2011
Leaf Number: 0255
Location: Foster City, CA

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 9:55 am

LEAFer wrote:But you are forgetting that this particular thread is about MIXING the OLD technology J1772-1996 (MCS unit) for use with the NEW standard (J1772-2010). The mixture, IMHO, requires more caution.
I may be wrong about this but I am only aware of two J1772 standards being J1772-2001 and J1772-2010 and my EVSE follows the former. Of course your point is still just as valid ;)

Nice little history on the subject http://evauthority.com/a-short-history- ... echnology/

Link to purchase the SAE J1772 Recommended Practice documents http://standards.sae.org/j1772_201001/
Green Honda EV Plus 02/1998-12/2003 plate "ZERO CO2" rip, Aptera 2e #726 canceled
Blue Nissan Leaf SL loaded reserved 04/20/2010 ordered 08/31/2010 EVSE Blink #182
CARWINGS Nickname Theres233, should be Spies

User avatar
LEAFer
Posts: 2647
Joined: Mon May 24, 2010 10:10 am
Delivery Date: 19 Jan 2011
Leaf Number: 000215
Location: Sacramento Area

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 10:24 am

Of course I have no way of knowing which version of the standard your EVSE follows ... I semi-purposely quoted "1996" to draw a bigger distinction between OLD and NEW and 2001 and 2010 could cause misinterpretation for dyslexically challenged readers :lol: (just kidding on that last part).

The 2001 replaced an OCT1996 version. See here: http://bzwxw.com/soft/UploadSoft/new5/S ... 2-2001.pdf (upper right corner)

Oh ... and look on page 11/32, section 5.4 :) ( I have not taken time to read the whole doc ... remember it's the 2001 version. )
2011 Silver SL+QC [Mfg: 11/2010] 36mo/15k LEASE
06Jun2013 Status [28.5 months][34,173 miles][11 bars]
Lost CapacityBar 6/6/13 @34,173 miles while in LEAF Battery Monitor: 83.41%, 71.4F (avg); cool overnight;

User avatar
Spies
Posts: 837
Joined: Sat Jul 31, 2010 8:22 am
Delivery Date: 10 Jan 2011
Leaf Number: 0255
Location: Foster City, CA

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 11:46 am

LEAFer wrote:Of course I have no way of knowing which version of the standard your EVSE follows ... I semi-purposely quoted "1996" to draw a bigger distinction between OLD and NEW and 2001 and 2010 could cause misinterpretation for dyslexically challenged readers :lol: (just kidding on that last part).

The 2001 replaced an OCT1996 version. See here: http://bzwxw.com/soft/UploadSoft/new5/S ... 2-2001.pdf (upper right corner)

Oh ... and look on page 11/32, section 5.4 :) ( I have not taken time to read the whole doc ... remember it's the 2001 version. )
And there is Gary's circuit on page 8, section 5.1 :D Nice find by the way.

Well I made the simple circuit and hooked it up to the EVSE and, drum roll please, it worked exactly as expected. So there is still a mystery to me as to what is going on behind the scenes between the EVSE and the LEAF. Hopefully the folks at Clipper Creek will know exactly what is happening otherwise I suspect I am going to need a copy of the J1772-2010 spec and an oscilloscope to even begin to figure this out.

One thing I did happen to notice is that when a timer is set on the LEAF and I plug the connecter into the LEAF while the EVSE has power and the LEAF goes through that cycle that triggers the EVSE to close the relays and then open them again the LEAF no longer thinks the EVSE is connected. The LEAF does show its plugged in however. I have also noticed that the LEAF will be in that same state after a successful charge in that the LEAF shows that it is no longer connected to the EVSE but still plugged in.
Green Honda EV Plus 02/1998-12/2003 plate "ZERO CO2" rip, Aptera 2e #726 canceled
Blue Nissan Leaf SL loaded reserved 04/20/2010 ordered 08/31/2010 EVSE Blink #182
CARWINGS Nickname Theres233, should be Spies

User avatar
Spies
Posts: 837
Joined: Sat Jul 31, 2010 8:22 am
Delivery Date: 10 Jan 2011
Leaf Number: 0255
Location: Foster City, CA

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 12:00 pm

garygid wrote:The J1772-2010 Standard seems to require a switch in the "nozzle" as part of a "proper" Proximity circuit implementation.

Measure the Resistance of the nozzle's Proximity pin to the ground pin. It should be about 150 ohms normally, and about 480 (150 + 330) ohms while the "Release" lever is pressed.

The internal switch shorts across a 330 ohm resistor that is wired in series with a 150 ohm resistor.
Gary you nailed it again! I just went out and measured the Yazaki plug and I got 149 ohms and with the release held down 479 ohms. No idea what the LEAF does with that but I did not notice anything by engaging and disengaging the switch when plugged into the LEAF.
Green Honda EV Plus 02/1998-12/2003 plate "ZERO CO2" rip, Aptera 2e #726 canceled
Blue Nissan Leaf SL loaded reserved 04/20/2010 ordered 08/31/2010 EVSE Blink #182
CARWINGS Nickname Theres233, should be Spies

AndyH
Posts: 6388
Joined: Fri Apr 23, 2010 3:43 pm
Location: San Antonio

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 12:17 pm

Guys, the J1772-2010 doc is linked in the reference docs section of the forum. ;) http://wenku.baidu.com/view/10b7d517552 ... ef7b6.html

As has already been addressed in various posts, J1772-2010 already has something like triple redundancy with regard to safely pulling the plug from the car - the pins are staggered so the control circuit is cut first (and this must kill power within milliseconds), pushing the 'release' button on the handle must kill power within milliseconds, pushing stop on the EVSE must...you guessed it - kill power within milliseconds. ;) Good luck trying to get this plug to arc on insertion or removal!

User avatar
garygid
Gold Member
Posts: 12465
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 12:43 pm

Car thinking it is plugged in is the Proximity pin, no connection back to the EVSE.

Car thinking that the EVSE is no longer there is either the PWM Control Pilot goes away (or the +12v DC Control Pilot pre-connection voltage goes away too), so the car thinks that the EVSE is no longer present. A DC voltmeter measurement of the CP line should tell us what is happening.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

User avatar
Spies
Posts: 837
Joined: Sat Jul 31, 2010 8:22 am
Delivery Date: 10 Jan 2011
Leaf Number: 0255
Location: Foster City, CA

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 12:57 pm

garygid wrote:A DC voltmeter measurement of the CP line should tell us what is happening.
Tell me how and I am on it! I have a volt meter at my disposal right now :)
Green Honda EV Plus 02/1998-12/2003 plate "ZERO CO2" rip, Aptera 2e #726 canceled
Blue Nissan Leaf SL loaded reserved 04/20/2010 ordered 08/31/2010 EVSE Blink #182
CARWINGS Nickname Theres233, should be Spies

User avatar
garygid
Gold Member
Posts: 12465
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Bad news using my retrofitted EVSE with the LEAF :(

Sun Jan 16, 2011 4:56 pm

Can you access the Control Pilot wire in your EVSE (that enters the e-hose)?

And the Ground?

Does the voltmeter have a 20v DC setting?

Can you do this without injuring or killing yourself?
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

Return to “EVSE / Charging Equipment and Networks”