Toyota Rav4 EV Forum

It is currently Wed Jun 03, 2020 4:05 am

All times are UTC [ DST ]




Post new topic Reply to topic  [ 57 posts ]  Go to page 1, 2, 3, 4, 5, 6  Next
Author Message
 Post subject: Traction Battery - Volts, Amps & SOC%, kWh, Rated Range
PostPosted: Thu Aug 21, 2014 9:59 am 
Offline

Joined: Wed Nov 14, 2012 9:50 pm
Posts: 4115
Location: San Diego
The Rav4 EV pack is almost exactly half the size of the Tesla 85kWh one. Actually, i might be fooled to think it is exactly half, except i think they used 2900ma cells, vice 3100ma.

When the car is fully charged, the cells (i don't know if this is individual, or groups of parallel cells) are 4.1 volts. At the "normal" charge of about 90%, the cells are about 4.05 volts. This, by the way, is exactly the voltages that the Nissan LEAF uses.

I drove tonight about 75 miles from Orange County to San Diego. I started around 54% SOC, with cells around 3.7 volts. I drove the car all the way to "Turtle", which occurred at 2.9% SOC. I continued to drive the car to 2.4% SOC, but the battery contactors did not open and i was in my garage.

For the 75 miles, the car reported that I used 21.993kWh, and regenerated 889kWh, for a net of 21.104kWh (yes, it actually gives all three values).

The cell voltages sagged significantly between 2.8xx volts and 3.2xx volts while driving at this low SOC%, entirely dependent on load. Once in my garage at 2.4% SOC, the cells reported 2.930 volts low to 3.122 volts high under no load.

We are compiling all the data as part of our "JdeMO" project, to offer CHAdeMO quick charging to Rav4 EV, Mercedes B-Class ED, and Tesla Model S (no adaptor required!).

More tidbits:

Low Battery Warning - 19.3% SOC
Very Low Battery - 13.9% SOC
Flashing gas can - 11.9% SOC
"LO" on the GOM - 8.4% (NOTE: cell voltages 3100-3190ma)
Climate Control Limited - 7%
Turtle - 2.9%
No cutoff by 2.4%

_________________
Tony Williams
QC Charge
1780-104 La Costa Meadows Drive
San Marcos, California 92078 USA
tony@QCcharge.com
www.QCcharge.com
Twitter: QCPower
1-844-EV-PARTS
1-844-387-2787
1-760-798-0342 Office
Hours M-F, 9-5 Pacific Time


Top
 Profile  
 
 Post subject: Re: Traction Battery Volts, Amps & SOC%
PostPosted: Thu Aug 21, 2014 3:42 pm 
Offline

Joined: Mon Jun 03, 2013 6:43 am
Posts: 284
Location: Redwood City, CA
Tony,

Congratulations on breaking the Tesla codes and getting / reporting these values!

_________________
2013 Blizzard Pearl VIN 1633
2013 Chevy Volt (my wife's)
Haibike Urban Xduro ebike
3.2 kW Solar PV system


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Thu Aug 21, 2014 4:30 pm 
Offline

Joined: Tue Mar 05, 2013 5:53 pm
Posts: 18
TonyWilliams wrote:
For the 75 miles, the car reported that I used 21.993kWh, and regenerated 889kWh, for a net of 21.104kWh (yes, it actually gives all three values).

Tony, what screen shows that information? Or a better question, how would I find this information from my RAV4 EV after a trip? Thanks.


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Thu Aug 21, 2014 5:46 pm 
Offline

Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1833
Location: Los Altos, CA
red_stripe05 wrote:
TonyWilliams wrote:
For the 75 miles, the car reported that I used 21.993kWh, and regenerated 889kWh, for a net of 21.104kWh (yes, it actually gives all three values).

Tony, what screen shows that information? Or a better question, how would I find this information from my RAV4 EV after a trip? Thanks.
This is likely available from CAN-Bus decoding. It probably can't be shown on any of the car's screens.

_________________
2012 Shoreline Blue #1462 w/JdeMO | 2018 Tesla Model 3 LR | 4.32kW Motech/Enphase PV Solar + 2x Powerwall 2 AC| Leviton EVB40 40A & Jesla Home Charging | 2015 e-Golf LE (returned)


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Thu Aug 21, 2014 6:18 pm 
Offline

Joined: Wed Nov 14, 2012 9:50 pm
Posts: 4115
Location: San Diego
This isn't available yet, but "next year", I suspect we will make this available to you. Lots of work to do.

_________________
Tony Williams
QC Charge
1780-104 La Costa Meadows Drive
San Marcos, California 92078 USA
tony@QCcharge.com
www.QCcharge.com
Twitter: QCPower
1-844-EV-PARTS
1-844-387-2787
1-760-798-0342 Office
Hours M-F, 9-5 Pacific Time


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Thu Aug 21, 2014 7:07 pm 
Offline

Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1833
Location: Los Altos, CA
TonyWilliams wrote:
This isn't available yet, but "next year", I suspect we will make this available to you. Lots of work to do.
Do you have a product form factor in mind? It would be amusing to use something like this: http://www.adafruit.com/products/1601
It's a 2.8" touch screen LCD that goes on a Raspberry Pi. Probably $100 of hardware all-in, except CAN-Bus interface.

_________________
2012 Shoreline Blue #1462 w/JdeMO | 2018 Tesla Model 3 LR | 4.32kW Motech/Enphase PV Solar + 2x Powerwall 2 AC| Leviton EVB40 40A & Jesla Home Charging | 2015 e-Golf LE (returned)


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Thu Aug 21, 2014 8:42 pm 
Offline

Joined: Wed Nov 14, 2012 9:50 pm
Posts: 4115
Location: San Diego
miimura wrote:
TonyWilliams wrote:
This isn't available yet, but "next year", I suspect we will make this available to you. Lots of work to do.
Do you have a product form factor in mind? It would be amusing to use something like this: http://www.adafruit.com/products/1601
It's a 2.8" touch screen LCD that goes on a Raspberry Pi. Probably $100 of hardware all-in, except CAN-Bus interface.


Yes, that is popular for these types of things.

I'm thinking more "custom" and less generic.

_________________
Tony Williams
QC Charge
1780-104 La Costa Meadows Drive
San Marcos, California 92078 USA
tony@QCcharge.com
www.QCcharge.com
Twitter: QCPower
1-844-EV-PARTS
1-844-387-2787
1-760-798-0342 Office
Hours M-F, 9-5 Pacific Time


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Thu Aug 21, 2014 8:47 pm 
Offline

Joined: Sat Mar 30, 2013 9:20 am
Posts: 694
Location: Seal Beach, CA
One could simply get a cheapo wifi or bluetooth ELM327 OBD2 adapter and connect that to his smartphone to access the CAN data. I have an app for my Leaf that does this, and I've been working on decoding the Rav CAN and creating an app to do similar things for it. Tony's way ahead of me though - I've so far only found an internal SOC measurement similar to the "GIDs" from the Leaf world, and representations of time-to-charge and power consumption while driving. It's pretty exciting to finally have a way to see a measure of SOC in the "no man's land" between normal and extended charge!

_________________
ImageRavCharge.com | 2012 Classic Silver | 2011 Leaf | Clipper Creek CS-60 | 40 amp openEVSE | 3.84kw PV


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Thu Aug 21, 2014 11:13 pm 
Offline
Site Moderator

Joined: Wed Nov 07, 2012 6:50 am
Posts: 1213
Location: San Jose, CA
For those interested in this kind of stuff, there is also a new smart phone app coming out called myEV by myCarma that logs SoC via a plug-in "device" in the car.

https://www.indiegogo.com/projects/myev-by-mycarma-electric-vehicle-logger-app

The most obvious thing lacking about the RAV4 EV is its minimalistic approach to instrumentation for real time electrical measurements from the battery pack.

_________________
Owner of 2012 Classic Silver RAV4 EV, 2012 Silver VOLT & 2008 Red C6 Z06
EMW JuiceBox Basic (fully optioned & customized) EVSE L2 charging station
https://enlighten.enphaseenergy.com/public/systems/TRVh161550


Top
 Profile  
 
 Post subject: Re: Traction Battery - Volts, Amps & SOC%, kWh
PostPosted: Fri Aug 22, 2014 12:33 am 
Offline

Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1833
Location: Los Altos, CA
TonyWilliams wrote:
I'm thinking more "custom" and less generic.
To my way of thinking, the case and the UI define how professional or "custom" it looks and feels. The guts don't really matter as long as it does the job well. Of course, showing the linux boot text going by on the screen when you power it on pretty much ruins the first impression...

_________________
2012 Shoreline Blue #1462 w/JdeMO | 2018 Tesla Model 3 LR | 4.32kW Motech/Enphase PV Solar + 2x Powerwall 2 AC| Leviton EVB40 40A & Jesla Home Charging | 2015 e-Golf LE (returned)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 57 posts ]  Go to page 1, 2, 3, 4, 5, 6  Next

All times are UTC [ DST ]


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
© Toyota Rav4 EV Forum - part of the MyElectricCarForums.com Group