Ev charging stations

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Electric Vehicle Charging Stations and Wiring

reikiman's picture

Electric vehicle charging standards

The following comes from a presentation at PlugIn 2010 - "The Near Future of Charging Panel AC vs. DC, slow vs. fast – the outlook for charging technologies". The presenters were all members of the SAE committees defining EV (automobile) charging standards.

SAE standards have defined six models of electric vehicle charging. Many have been thinking "Level 1" is regular US household outlets, "Level 2" is the EVSE equipment being deployed for cars, and that "Level 3" is the DC Fast Charge system. The panel presentation was meant to get us straight on what the SAE committee's have been discussing to organize the charging system.

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AC Charging DC Charging
AC Level 1 120 V AC Single phase; max 16 amps; max 1.9 kw DC Level 1 200-450 V DC; Current <= 80 amps; power <= 19.2 kw
AC Level 2 240 V AC Single phase; max 80 amps; max 19.2 kw DC Level 2 200-450 V DC; max 200 amps; max 90 kw
AC Level 3 Not defined yet but they might do so, might cover AC three phase DC Level 3 TBD, may cover 200-600 V DC; may cover up to 400 amps; may cover up to 240 kw

Essentially "Level 3" doesn't exist yet and the charging standard everybody has been thinking of as "Level 3" is really either "DC Level 1" or "DC Level 2".

There are unfortunately several kinds of connectors being used:

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The AC Level 1 connector we all use in our homes isn't shown. The top connector is the J1772 connector that all the automakers have agreed on. The bottom one is a proposal for DC Level 2 which combines the J1772 connector with a couple extra pins for DC charging.

The connectors defined for Europe are different from the ones defined in the US and Japan. The signals are all the same on the connectors, just the connector shapes are different. Also Japan has defined a DC Fast Charge system, CHAdeMO, which is popular in Japan but the SAE committee is apparently reluctant to adopt.

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IEC 62192-2 Type 1 is approximately the same as the J1772 connector. However IEC 62192-2 Type 2 is not.

The pinouts of some connectors under discussion are as follows.

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A preview of a future parking controversy - are hybrid cars allowed to use electric car parking?

6cfa3aa2.jpgHere in California there are electric vehicle charging stations in some parking lots or garages. Primarily these were installed in the period 10+ years ago when the EV Mandate was still strong. Obviously EV success is more assured when there is recharging infrastructure. Part of the success of gas cars is the existing gasoline recharging infrastructure that lets gas car owners to conveniently drive anywhere. It's so ubiquitous and ingrained in everybody's thinking that they don't even consider the inconvenience it is to stop at a gas station or the times they run out of gas before finding a gas station or the network of businesses that exist to assist recharging gas cars who inconveniently ran out of gas before their operator found a gasoline recharging station.

In any case later this year there will be several electric vehicles come onto the market. Occurring in parallel with these vehicles are projects to build new EV recharging infrastructure. A US Dept of Energy program is building EV charging networks in 13 cities around the US. Nissan specifically chose cities for their initial rollout based on willingness to build EV charging infrastructure. etc. It's widely understood there is a chicken-and-egg situation where prospective EV owners are less likely to buy if there's no charging infrastructure, and prospective owners of charging infrastructure are less likely to build if there are no electric vehicles.

The experience from the EV Mandate era is something from which we can learn lessons, and the need for infrastructure is one of those lessons. One of the lessons is what EV owners have called being ICE'd out. "ICE" means "Internal Combustion Engine" and the ICE'd Out is what happens when an ICE car uses the parking reserved for EV's. The EV parking spots were usually installed at "the front", most places put them near the front of the store perhaps next to the handicap parking. The enforcement of EV parking rules has been spotty especially considering that very few electric vehicles exist and the EV parking usually goes unused. It seems that, often, the EV parking spots have gas cars parked in them. The ICE car in EV parking prevents an EV car from using that parking spot.

Would gas car owners appreciate it if a contingent of EV owners parked their cars to block all access to gasoline stations? No. But that's the effect of an EV owner being ICE'd Out. An ICE'd Out EV owner is being prevented from recharging their car just as if a gas car owner would be if their gasoline stations were blocked.

fdb38010.jpgI've been experiencing a strange form this at my workplace. At the office there are EV charging spots in the parking garage that were installed 10+ years ago. What's shown in these pictures is the EV parking, and a hybrid car that blatantly is parked in the EV charging. What appears to have happened is over 10 years of disuse some especially blatant hybrid car owners have decided that their hybrid car qualifies them to use EV parking. While I appreciate that hybrid car owners have taken some step to decrease their environmental impact, they just don't get it. Maybe they're under a delusion that EV parking is a perk rather than a necessity. EV charging in parking lots is almost as much a necessity as handicapped access is in parking lots. Electric car owners have to recharge their cars and, unlike gasoline recharging infrastructure, electric recharging infrastructure is in parking lots. Hybrid car owners cannot use the electric recharging facilities, unless they are plug-in hybrids.

This is easily predictable.. As electric cars start being sold later this year, and as EV charging networks are improved or built, there will be some confusion over who can park in them. It will be like the competition over handicapped parking where some uncaring nonhandicapped people use the spots reserved for the handicapped. There will be signs clearly marking EV parking, just as there are signs clearly marking handicapped parking. But some simply won't care, or won't understand, etc. A lot will depend on how many EV's are bought and how well used the EV parking is. Maybe. For example it's kinda sorta understandable if you squint your eyes right that unused EV or handicap parking rubs people the wrong way ("the best parking spots are never used.. WTF").

Background:

Electric Vehicle infrastructure issues demonstrated by Shocking Barack ride

Infrastructure considerations for gasoline, ethanol, biodiesel, electricity, hydrogen, and...

Planning for the coming wave of electric vehicles

Guide of available charging stations

I found this link on Google, and it's pretty much a complete list of charging stations available throughout
different states. You can either do a search by a color coded map or you can find charging stations lists by cities.
I am not sure how up-to-date this search engine is.

http://www.evchargernews.com/#regions

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