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Electrical Vehicle Chargers

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alphacat

New Member
Hey.

I'm very interested in this subject.
I read about Coulomb Tech. that owns such product and wanted to ask something about it please.

Each Charging Station comprises a RFID reader (Smart Card Reader), as part of the authentication process of allowing only permitted cars to use the Charging Station for charging.

Is this Smart Card installed on the car itself, meaning the car itself is being autherized, or is the Smart Card given to the driver, which will allow the driver to charge any vehicle he desires (not only his own vehicle).

Thank you in advance.
 
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PatM

Member
It wouldn't make and difference as far as I can see.
The owner who registered would still be the one who is billed for the service.
 

alphacat

New Member
Yeah, but if the Charging Station authorizes the driver, and not the vehicle, then a driver who receives such vehicle from the company he works for (for example) could use the card in order to charge its private vehicle.
 
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alphacat

New Member
I'd like to understand one other thing please.
It says in the datasheet of the EV Charger:



Does it mean that the cord which connects the EV Charger to the vehicle passes 30A or 46A?

Moreover, why are two lines of 30A needed if only one 30A line is used in the output?

Thanks guys.
 

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bountyhunter

Well-Known Member
There are two charge levels on the right column: the low level uses only the 120V/16A line (level 1: 1.9kW). The higher level 2 uses a 208/[email protected] three phase power for 7.2kW charge power. The 120V uses two wires (line and neutral) and the 240V three phase uses two lines and neutral. Total of five wires: Line(120), Line (240), Line (240), neutral, earth ground. Each 240Line is rated for 30A, the 120 Line is 16A.
 
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alphacat

New Member
Thank you very much fella!
Great explanation!

Do you think that the operator should choose between higher level (fast charge) and lower level (slow charge)?
 
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bountyhunter

Well-Known Member
You would use slow charge if you have the time and fast charge only if you must. fast charge will likely be less efficient because it pushes the power converter harder. It also increases peak power usage.
 

Mr RB

Well-Known Member
How are they going to stop people snarfing other people's RFID transmissions and then using them to fill up on someone else's account??

I though RFID was barely secure enough to stop people walking through a doorway...
 
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