User avatar
Nubo
Posts: 4848
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: what level am I charging at?

Fri Feb 24, 2012 6:27 pm

DoxyLover wrote:
Nubo wrote:If all else fails, you can take a direct measurement

Image

http://www.cabletiesandmore.com/america ... -p-614.php

Actually, no. If you just clamp this around the J1772 cable, you're read 0 amps. You need to actually split out one of the conductors and clamp that. When you clamp the entire cable, you read one conductor with current going one way and the other conductor with current going the other way; they cancel out.


AHA! should have realized that. Never measured 240 :oops:
I noticed you're still working with polymers.

DoxyLover
Posts: 517
Joined: Fri Jul 15, 2011 9:52 pm
Delivery Date: 16 Oct 2011
Leaf Number: 9214
Location: San Jose, CA

Re: what level am I charging at?

Fri Feb 24, 2012 10:23 pm

Nubo wrote:
DoxyLover wrote:
Nubo wrote:If all else fails, you can take a direct measurement

Image

http://www.cabletiesandmore.com/america ... -p-614.php

Actually, no. If you just clamp this around the J1772 cable, you're read 0 amps. You need to actually split out one of the conductors and clamp that. When you clamp the entire cable, you read one conductor with current going one way and the other conductor with current going the other way; they cancel out.


AHA! should have realized that. Never measured 240 :oops:

Voltage doesn't matter. You clamp one around a 120V extension cord and you'll read 0 amps, unless you have a ground fault that's not flowing over the ground wire in the cord.

To measure the current, you need a wire splitter, such as http://www.multimeterwarehouse.com/M920f.htm. Unfortunately, they don't make one for a J1772 :lol:
2011 Brilliant Silver Leaf SL
Reserved, quoted and ordered July 11, 2011
Delivered October 16, 2011 (Na. Plug-In Day)

DoxyLover
Posts: 517
Joined: Fri Jul 15, 2011 9:52 pm
Delivery Date: 16 Oct 2011
Leaf Number: 9214
Location: San Jose, CA

Re: what level am I charging at?

Fri Feb 24, 2012 10:30 pm

Smidge204 wrote:
DoxyLover wrote:When you clamp the entire cable, you read one conductor with current going one way and the other conductor with current going the other way; they cancel out.

...you hope! :lol:

May as well spring for one that does DC amps, too. I recently picked up a decent one for about $100.
=Smidge=

Nice price. I use one of these at work:
Image
http://www.amazon.com/Fluke-I30-AC-Current-Clamp/dp/B0012S60X0

3x the price and needs a separate multimeter, but then, It's a Fluke :D
2011 Brilliant Silver Leaf SL
Reserved, quoted and ordered July 11, 2011
Delivered October 16, 2011 (Na. Plug-In Day)

rickbol
Gold Member
Posts: 10
Joined: Thu Sep 01, 2011 10:24 am
Delivery Date: 18 Feb 2018
Location: Western North Carolina

Re: what level am I charging at?

Mon Feb 27, 2012 10:39 am

That there is no indication of current charge rate available in the car interface(s) somewhere blows my mind. I forsee the future situation where the "smart grid" "manages" the maximum current deliverable to a number of chargers by kicking them down to a lower level of charge in order to accommodate more connections (without exceeding max current for the given infrastructure).

I'm pretty sure I plugged into a GE charger recently at a nearby museum, and while being a big, shiny, colorful, charge terminal, I don't think it was delivering 16A@240V, Likewise for some round Aeroenvironment chargers in a local public parking deck (fortunately, they're marked as 120V chargers).

Geez, that's a feature that should be added to a firmware update.
2016 LEAF SV: Glacier Pearl 24kWh, w/6.2k mi
2/18/2018

2012 LEAF SV: Glacier Pearl
Reserved: 5/10/10
Delivery: 12/13/2011
Off lease: 12/~13/2014
Duke Energy Charge Carolinas Charger:
Siemens - 8EM1111
Installed 12/23/11

User avatar
Nubo
Posts: 4848
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: what level am I charging at?

Mon Feb 27, 2012 12:35 pm

DoxyLover wrote:Voltage doesn't matter. You clamp one around a 120V extension cord and you'll read 0 amps, unless you have a ground fault that's not flowing over the ground wire in the cord.

To measure the current, you need a wire splitter, such as http://www.multimeterwarehouse.com/M920f.htm. Unfortunately, they don't make one for a J1772 :lol:


That'll tech me for talking out my butt. But I could have sworn I'd seen some type of measurement device like this that gauged current in a cord. Is there some other thing that does this? :?
I noticed you're still working with polymers.

kmp647
Posts: 1135
Joined: Tue Jul 27, 2010 4:00 pm
Delivery Date: 11 Nov 2011
Location: Northern Virginia

Re: what level am I charging at?

Mon Feb 27, 2012 5:57 pm

A lot of the public L2 are running on 208v and seem slower than my home unit that is on 240v

This stinks especially since the leaf is limited so much on L2


Charge times are longer when I am at the mall, maybe it's a scheme to get you to shop more :ugeek:

Anyway I wish the leaf could ramp up the amps in response to the 208 voltage
2012 SL Leaf
order 07/28/2011
took delivery 11/11/11
47,000 miles 10 bars 211 gids
Turned back into Nissan 12/31/14 @ 50,000 miles
BMW i3 rex 24 month lease
2017 BMW X540e phev
Tesla model 3 reservation

User avatar
planet4ever
Posts: 4674
Joined: Sat Apr 03, 2010 9:53 pm
Delivery Date: 02 May 2011
Leaf Number: 1537
Location: Morgan Hill, CA, south of San Jose

Re: what level am I charging at?

Mon Feb 27, 2012 6:30 pm

kmp647 wrote:Anyway I wish the leaf could ramp up the amps in response to the 208 voltage
I thought it did, to some extent. Didn't Phil tell us some time back that he had measured 17 or 18 amps when he dropped the voltage? I recall this coming up was while he was testing his Rev 2 EVSEupgrade.

Ray
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.

cwerdna
Posts: 8090
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: what level am I charging at?

Wed Mar 07, 2018 11:15 pm

(Wow, I just realized I resurrected a thread from 6 years ago.)
rickbol wrote:That there is no indication of current charge rate available in the car interface(s) somewhere blows my mind. I forsee the future situation where the "smart grid" "manages" the maximum current deliverable to a number of chargers by kicking them down to a lower level of charge in order to accommodate more connections (without exceeding max current for the given infrastructure).
...
Geez, that's a feature that should be added to a firmware update.

Not many other EVs/PHEVs display it in the vehicle either. Tesla Model S can though. At the time rickbol asked for this, the first Model S hadn't shipped yet. 1st delivery didn't happen until June 2012.

As for what you foresee, it's already available. See https://www.chargepoint.com/products/po ... ement-faq/. I only became aware of it when a Chargepoint rep came to a meeting w/our facilities person who's been assigned charging station-related duties. I attended since I'm an enthusiast and had been communicating w/facilities a bunch relating to our EV charging situation.

As for the feature... use Leaf Spy. This is probably the 1st time I've hear for such an ask in the UI of the car here on MNL and I've been on the forum since mid-2011. Your ask would be nowhere near the top of a list of top 20 feature requests.

'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

rickbol
Gold Member
Posts: 10
Joined: Thu Sep 01, 2011 10:24 am
Delivery Date: 18 Feb 2018
Location: Western North Carolina

Re: what level am I charging at?

Thu Mar 08, 2018 5:56 am

I am surprised that this didn't irk more people. It really irked me. How hard could that have been to add? Even more important once the LEAF had either a 3.3kW or 6.6kW onboard controller options.

I haven't tested for 3.3kW charging, but the dash UI shows how long till full charge @ 6.6 if I enable accessory mode while charging. Of course, Leaf Spy tells me what I wanna know (Thank You Turbo3!!!). Now, if I could only route that data wirelessly and securely... maybe with the server option and an old rooted phone?

The thing is, if I pull into a place to charge, I very well may want/need to know about how long I need to charge. There's a big difference in time between 6.6kW and 3.3kW charging (or otherwise) for the first 80%. As charging infrastructure gets smart and dynamic, it may make it harder to plan one's time.

I haven't had to think about this for awhile, and now I have 6.6 and QC, and there actually are a number of QCs around, so my charging options are considerably greater than they were 3 years ago.

Cheers,

rickbol
2016 LEAF SV: Glacier Pearl 24kWh, w/6.2k mi
2/18/2018

2012 LEAF SV: Glacier Pearl
Reserved: 5/10/10
Delivery: 12/13/2011
Off lease: 12/~13/2014
Duke Energy Charge Carolinas Charger:
Siemens - 8EM1111
Installed 12/23/11

Return to “Batteries & Charging”