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 Post subject: Re: Charging cable theft protection
PostPosted: Sat Dec 27, 2014 10:47 am 
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Joined: Tue Nov 18, 2014 2:32 pm
Posts: 123
Exactly, EVSE = Electric Vehicle Supply Equipment

Some history behind (found online)...

When discussing electric vehicles and charging standards, things can get a bit confusing. Progress has been made in terms of unification, with the J1172 connector becoming a standard in most of the world. However, nomenclature still brings about plenty of conversational disorientation. Modern electric vehicles (EVs) such as the Nissan Leaf have the charger built into the car? If this is so, what, you may ask, is the $2,200 Aerovironment "wall charger" that wants to sell me to charge the Leaf (or another EV)? Well, that wall charger or charging station is really just a device that safely allows electricity to flow. These "chargers" and the protocols established to create them are known as EVSE (electric vehicle supply equipment), and they enhance safety by enabling two-way communication between the charging station and the electric vehicle.

The term EVSE has been in use for a long time, and the 1996 NEC and California Article 625 defined EVSE as:
The conductors, including the ungrounded, grounded, and equipment grounding conductors, the electric vehicle connectors, attachment plugs, and all other fittings, devices, power outlets or apparatuses installed specifically for the purpose of delivering energy from the premises wiring to the electric vehicle.
This two-way communication ensures that the current passed to the vehicle is both below the limits of the wall charger itself and below the limits of what the car can receive. There are additional safety features such as a safety lock-out that does not allow current to flow from the wall charger until the plug is physically inserted into the car. While this new standard does result in additional cost to the consumer (versus just plugging into any 240 volt socket), their are benefits besides just safety. Adjusting the vehicle's on-board charger to make sure it doesn't exceed the power limits of the circuit it is plugged into is no longer required with EVSE. This is an important simplification to the charging process, and should help facilitate adoption of EVs in the future for people who could care less what current, voltage or wattage are.

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 Post subject: Re: Charging cable theft protection
PostPosted: Sat Dec 27, 2014 10:51 am 
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Joined: Thu Dec 04, 2014 8:25 am
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Thanks @t3lmo !


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 Post subject: Re: Charging cable theft protection
PostPosted: Sun Dec 28, 2014 12:28 pm 
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Joined: Fri Oct 31, 2014 6:57 am
Posts: 158
BeeJay wrote:
Another trick I have seen, but not used myself yet, is to pass a loop of the cable round a spoke of an alloy wheel and then put a more sturdy padlock onto that loop to lock it back onto its cable.


Here is a picture from another site of what I was talking about.

https://speakev.com/threads/extra-cable ... post-70103

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 Post subject: Re: Charging cable theft protection
PostPosted: Sun Dec 28, 2014 3:22 pm 
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Joined: Thu Oct 23, 2014 3:08 pm
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Thanks a lot for all the valuable input - I will use the padlock method from now on. The idea of parking with one wheel on the cable I think was brilliant but maybe not very convenient...

I also found some interesting information about how the EVSE works. Is there something written about how a standardized EVSE work? I thought it only used the signal wires to communicate with the built in charger in the car and that this signal was pure digital - on or off with the AC-current. Current limited to what the EVSE is set to (6, 10 or 16A) or what the car is limited to handle (usually 16A).

Curious!


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 Post subject: Re: Charging cable theft protection
PostPosted: Sun Dec 28, 2014 4:51 pm 
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Joined: Tue Nov 18, 2014 2:32 pm
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The EVSE protocol is open source project, and many have already implemented their own systems.
The most known is OpenEVSE: https://code.google.com/p/open-evse/
Some have built DIY modules: http://store.openevse.com/

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 Post subject: Re: Charging cable theft protection
PostPosted: Sun Dec 28, 2014 5:48 pm 
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Joined: Mon Dec 16, 2013 1:18 pm
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Location: Netherlands
EVkris wrote:
Thanks a lot for all the valuable input - I will use the padlock method from now on. The idea of parking with one wheel on the cable I think was brilliant but maybe not very convenient...

Have you ever lost the key or the code to a suitcase lock? I can break such a small padlock in two seconds flat...

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 Post subject: Re: Charging cable theft protection
PostPosted: Mon Dec 29, 2014 4:23 am 
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To be fair... if you are so inclined to pinch a cable you would just unplug it and cut the cable itself to remove the lock.
I think the padlock idea is about as secure as your going to be :)


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 Post subject: Re: Charging cable theft protection
PostPosted: Mon Dec 29, 2014 4:28 am 
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Those plugs are expensive as well - and it seems to be a bit dodgy to cut a cable that might have 300 V from the car on it...Better to take a couple of pliers and break the lock.

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 Post subject: Re: Charging cable theft protection
PostPosted: Mon Dec 29, 2014 4:36 am 
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jaapv wrote:
and it seems to be a bit dodgy to cut a cable that might have 300 V from the car on it...

You would unplug it first.


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 Post subject: Re: Charging cable theft protection
PostPosted: Mon Dec 29, 2014 4:50 am 
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Ah- but the car side may be live as well... Besides, most public chargers lock te cable down anyway.

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