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 Post subject: Re: Quick charge project
PostPosted: Fri Jan 15, 2016 9:33 am 
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Joined: Thu Nov 21, 2013 10:00 am
Posts: 236
Location: Gibsonia, PA
coulomb_carl wrote:
If you have motor torque, current, voltage and RPM PIDs you can calculate motor efficiency? Might be interesting to see how efficient the motor is in both power and regen. A bit confused since in your display showing regen the torque and RPM computes to 4.1kW but volts and amps are 6.2kW?

Good catch. I think RPM is off by x2. I could collect some data to get an idea of efficiency over different modes.

_________________
2018 Tesla Model 3 LR AWD Multicoat Red Metallic
2012 Ford Focus Electric Ingot Silver - Sold
BRUSA Boosted to 46A at 240V charging, 11kW
Chademo DC Quick Charge Enabled!
Home Quick Charger --> 33.8 kW AC / 31.3 kW DC


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 Post subject: Re: Quick charge project
PostPosted: Fri Jan 15, 2016 10:31 am 
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Joined: Mon Dec 21, 2015 12:05 pm
Posts: 8
Location: Phoenix, AZ
sefs wrote:
coulomb_carl wrote:
If you have motor torque, current, voltage and RPM PIDs you can calculate motor efficiency? Might be interesting to see how efficient the motor is in both power and regen. A bit confused since in your display showing regen the torque and RPM computes to 4.1kW but volts and amps are 6.2kW?

Good catch. I think RPM is off by x2. I could collect some data to get an idea of efficiency over different modes.

I wondered about the RPM. If it is indeed off by two then in your displays the powering motor efficiency would be about 96% and the pure regen braking motor efficiency would be about 76%. Eminently reasonable, I think. Would be interesting to see how high the motor efficiency can be while braking at various pedal efforts.


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 Post subject: Re: Quick charge project
PostPosted: Fri Jan 15, 2016 10:36 am 
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Joined: Thu Nov 21, 2013 10:00 am
Posts: 236
Location: Gibsonia, PA
coulomb_carl wrote:
sefs wrote:
coulomb_carl wrote:
If you have motor torque, current, voltage and RPM PIDs you can calculate motor efficiency? Might be interesting to see how efficient the motor is in both power and regen. A bit confused since in your display showing regen the torque and RPM computes to 4.1kW but volts and amps are 6.2kW?

Good catch. I think RPM is off by x2. I could collect some data to get an idea of efficiency over different modes.

I wondered about the RPM. If it is indeed off by two then in your displays the powering motor efficiency would be about 96% and the pure regen braking motor efficiency would be about 76%. Eminently reasonable, I think. Would be interesting to see how high the motor efficiency can be while braking at various pedal efforts.

Keep in mind that there are about 0.2-0.4kW of 12V DC/DC converter load, as well as any HVAC loads, which may have been on at that time. In my new display, I have those individually called out as well.

_________________
2018 Tesla Model 3 LR AWD Multicoat Red Metallic
2012 Ford Focus Electric Ingot Silver - Sold
BRUSA Boosted to 46A at 240V charging, 11kW
Chademo DC Quick Charge Enabled!
Home Quick Charger --> 33.8 kW AC / 31.3 kW DC


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 Post subject: Re: Quick charge project
PostPosted: Tue Jan 19, 2016 8:52 am 
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Joined: Mon Dec 21, 2015 12:05 pm
Posts: 8
Location: Phoenix, AZ
Is the motor current available as a PID or just the battery current?


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 Post subject: Re: Quick charge project
PostPosted: Sun May 01, 2016 11:28 pm 
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Joined: Wed Apr 01, 2015 11:45 am
Posts: 36
I wonder how difficult it would be to upgrade the charging port to CCS?


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 Post subject: Re: Quick charge project
PostPosted: Mon May 02, 2016 6:42 am 
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Joined: Tue Aug 16, 2011 11:40 am
Posts: 1044
Location: Toledo, Ohio
The difficult (expensive) thing for a retrofit would be the high voltage wiring and likely necessity for contactors on those HV wires. Because of this I doubt we'll ever see a ford approved upgrade since it would be so expensive no one would do it.

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http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)


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 Post subject: Re: Quick charge project
PostPosted: Mon May 02, 2016 7:09 am 
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Joined: Sat Aug 10, 2013 6:59 pm
Posts: 87
triangles wrote:
The difficult (expensive) thing for a retrofit would be the high voltage wiring and likely necessity for contactors on those HV wires. Because of this I doubt we'll ever see a ford approved upgrade since it would be so expensive no one would do it.

Maybe a simple retrofit battery upgrade option is in the future.


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 Post subject: Re: Quick charge project
PostPosted: Mon May 02, 2016 11:14 pm 
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Joined: Wed Apr 01, 2015 11:45 am
Posts: 36
Wait, what?

Wouldn't it be a direct swap of the connector, with just two lines running from the additional pins to the HVB?


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 Post subject: Re: Quick charge project
PostPosted: Tue May 03, 2016 11:23 am 
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Joined: Tue Aug 16, 2011 11:40 am
Posts: 1044
Location: Toledo, Ohio
rsanders4 wrote:
Wait, what?

Wouldn't it be a direct swap of the connector, with just two lines running from the additional pins to the HVB?

I'm pretty sure you have to have a contactor and some safety logic so those HV pins aren't always connected to the battery. Otherwise some idiot would remove themselves from the gene pool by sticking their finger(s) in the connector and touching the pins.

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http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)


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 Post subject: Re: Quick charge project
PostPosted: Fri May 06, 2016 2:47 pm 
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Joined: Wed Apr 01, 2015 11:45 am
Posts: 36
I guess what I meant was to replace the charging port and harness with one from a 2017.

I'd bet heavily not much under the hood will be changing, and the understanding I have is that the car already CAN support CCS, it just doesn't have the connector.


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