[Tagging] charging station power output
lucas-osm at use.startmail.com
lucas-osm at use.startmail.com
Sat Mar 11 10:11:21 UTC 2017
> Most sockets have a stated maximum for any installation no matter where they are installed (house, factory, charging station).
> I think this will be the same for your charging stations? In other words - this does not change in a given distribution area (country).
> From this you can determine the minimum recharge time - assuming the maximum socket power is available, an optimistic value.
For some sockets this is true, like the Schuko and the CEEs, they always operate on their maximum: Schuko 3,5kW, cee_red_16a 11kW, cee_red_32a 22kW. But others don't. E.g. the Type2 is specified for 3-70kW.
https://en.wikipedia.org/wiki/Type_2_connector (first paragraph). And most of the stations I’ve seen only provided 3,5kW or 22kW or 43kW on these Type2s. This strongly depends on accessibility to the power grid.
The Type2_combo currently seems to be standardized for 150kW and according to Wikipedia car manufactures are trying to build stations providing 350kW at this socket https://en.wikipedia.org/wiki/Combined_Charging_System. Most stations currently provide 50kW at these, so there will be stations from 50-350kW.
Currently there are already many different implementations out there and the variety on power one socket can provide will increase in the future. That's why I think the max. power per socket is so interesting. Primarily on those sockets particularly designed for charging cars. Because locally there isn't always enough power available and DC charging requires rectifiers build into the station itself. This increases the cost drastically, that's why not all providers go with the maximum these sockets can handle.
> Where a charging station limits the total output power due to the number of sockets in use ...
> You cannot determine from OSM how many are in use at the moment, nor how many might be in use in an hours time nor their respective loads (and these may well change over time)
> ... so you cannot determine the charge time ... because of the variable number of sockets and their power requirements that are in use now and into the future.
> So the information maybe of little very real value?
That’s right. We do not know how many currently are in use, or maybe will in the future. That’s why we can not determine the exact time necessary to charge. But if we know the station got 3 sockets each of them say 50kW and the whole station only got an input of 60kW. This means each socket could in the worst case only provide about 20kW. But if we knew the whole station got an input of 120kW, each socket could provide 40kW. That’s a huge difference. This way the driver can make himself an idea about the worst and best case scenarios.
I do not own an electrical car, but someone I know does. He told me the input of the station + number of sockets available + single socket’s power really matters to him in planning his trips. That’s the reason I started thinking about mapping this in OSM.
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