Thứ Năm, 24 tháng 11, 2016

CHAdeMO Adapter part 5

  • Jul 17, 2015
    AEdennis
    Sorry for late response... Been out and about driving my wife's Roadster...

    Yes, it's an Efacec and runs 152 miles per hour when I first started, then ramped up as high as 156 miles per hour...

    That's significantly faster than the Eaton at Mitsubishi or the Nissan in West LA that I've tested.
  • Jul 21, 2015
    lg_golfs
    Apologies I have not read through the pages. It looks like the CHAdeMO bypasses the mobile connector cable. Is that correct? If so, this might be a great item to keep in my car. I actually have a decent amount of CHAdeMO and where I am planning on taking my next two road trips.
  • Jul 21, 2015
    scottf200
    CHAdeMO_Adapter_InContext_v02_1024x1024.jpeg
  • Jul 21, 2015
    AEdennis
    The CHAdeMO adapter does not use the UMC/MC of the car. It is like the J1772 adapter in that it plugs into the connector and then to the charger.

    A lot of CHAdeMO chargers cost $ to use above the power that you use. If you're plugging in overnight, I recommend a slower charge J1772 if out in public and away from Superchargers.

    The picture that @Scottf200 is as good as anyone elses to show the size and what you have to deal with for the CHAdeMO adapter.


  • Jul 22, 2015
    Oba
    It might be easier to compare the CHAdeMO speed with amps delivered. One twist to that is that the dash display in the car is showing the net amperage, less overhead for the car. The current maximum is 125 amps for the CHAdeMO standard.

    Very, very few will be at 125 amps, and most will be at 120 amps. Virtually all of the Nissan units are 115 amps. Particularly in California, some of these units have been dialed down as low as 48 amps.
    Folks tend to equate the CHAdeMO adapter with any failing in speed not realizing, perhaps, that it's the settings in the actual charger that are limiting speed.

    Power (kW) is merely amps multiplied by volts. Your particular voltage is based on which car you have, as the cars currently have two maximum voltages; 352v for 60/70 cars (84 cells in series) and 403v for 85 and probably 90 cars (96 cells in series).

    Therefore, pulling 115-125 amps from a CHAdeMO charger with a higher voltage battery will show more "MPH" and kW than one with a lower voltage. My point is that to accurately compare CHAdeMO performance to each unit, amps is key, not MPH or kW.

    I plugged my car into a Nissan CHAdeMO unit operated by NRG / eVgo in Los Angeles recently. Not surprisingly, it performed exactly as I expected, delivering the rated amps, and displaying the rated amps less the vehicle's overhead of several amps on the dash.

    Typical performance of my 70D on a Supercharger(max rated miles 240):

    Min - Rated Miles - Volts - Amps - kW - MPH Calculated@ 287 Wh/mile

    0 ------- 7 --------- 282 --- 0 ------- 0 ------------- 0 ----
    1 ------- 9 --------- 310 -- 367 -- 113.7kW ------ 396mph
    2 ------ 21 --------- 316 -- 360 -- 113.7kW ------ 396mph
    7 ------ 49 --------- 322 -- 335 -- 108.8kW ------ 379mph
    10 ----- 65 --------- 324 -- 305 -- 98.8kW ------- 344mph
    15 ----- 92 --------- 327 -- 254 -- 83.0kW ------- 289mph
    20 ---- 113 --------- 331 -- 216 -- 71.5kW ------- 249mph

    With any CHAdeMO adapter, the charger will merely chug along at whatever setting that the charger is set at in amps until perhaps 80% (200 miles for my car). This assumes, of course, that the adapter doesn't overheat and slow down (already has happened), or the charger overheat and shutdown (common with Nissan chargers), or the battery temperature is too hot or cold, et al. What follows is a dramatization of a 115 amp Nissan charger with my car. Remember, 115 amps will show as 111-112-ish on the dash:

    Min - Rated Miles - Volts - Amps - kW - MPH Calculated@ 287 Wh/mile

    0 ------- 7 --------- 282 --- 0 ------- 0 ------------- 0 ----
    1 ------- 9 --------- 300 -- 111 -- 33.3kW ------- 116mph (about two miles per minute)
    4 ------ 17 --------- 306 -- 112 -- 33.5kW ------ 118mph
    16 ----- 49 --------- 312 -- 111 -- 33.8kW ------ 120mph
    25 ----- 65 --------- 316 -- 112 -- 34.6kW ------- 122mph
    40 ----- 92 --------- 320 -- 111 -- 35.0kW ------- 124mph
    55 ---- 113 --------- 324 -- 111 -- 36.0kW ------- 125mph
    75 ---- 153 --------- 333 -- 112 -- 36.5kW ------- 127mph
    90 ---- 183 ----------343 -- 111 -- 37.3kW ------- 130mph
    105 --- 210 --------- 352 -- 108 -- 38.0kW ------- 133mph (first amp limiting due to max volts)
    120 --- 228 --------- 352 --- 60 -- 21.1kW -------- 73mph
    140 --- 240 --------- 352 --- 0 -------0kW --------- 0mph

    Hopefully, it's easy to see how an 85-90kWh Tesla with 403v battery during charging wiill gain significantly more rated miles and higher kW with CHAdeMO:

    111a * 385v = 43kW typical

  • Jul 22, 2015
    smilepak
    I was skeptical, but turned out the best investment. Until we can get more supercharger, it's the fast public charging available
  • Jul 24, 2015
    AEdennis
    Ok, I was by ARTIC today and decided to see what the maximum Amperage at this location was and it goes between 121 and 122 A for most of this charging session and at 391 V... So, that's 47,702 watts(?)/47.7 kW. Right? (Someone check me, I'm learning this from you guys... It's been entirely too long since high school Physics class)

    Getting 156 miles per hour on my S85
  • Jul 24, 2015
    JMG
    Used mine the other day at a WalGreens outside of Denton, TX and got the red alert on my dash that the CHAdeMO adapter was very hot after about 20 minutes. It automatically dialed back the amps to 15 or so for a while. Slowed me down. :frown:
  • Jul 24, 2015
    andrewket
    Interesting. I haven't used my adapter much, but thus far I've only seen the charger overheat not the adapter.
  • Jul 24, 2015
    physicsfita
    Your calculations are correct!
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