Toyota Rav4 EV Forum

It is currently Wed Jun 03, 2020 3:33 am

All times are UTC [ DST ]




Post new topic Reply to topic  [ 37 posts ]  Go to page Previous  1, 2, 3, 4
Author Message
 Post subject: Re: Battery Degradation
PostPosted: Thu Jun 12, 2014 8:21 pm 
Offline

Joined: Sun Mar 03, 2013 2:26 am
Posts: 305
Location: Austin, TX
Mine too took about a 25% hit in the winter time. Normally I get between 95-110 miles of estimated range on Standard charge and 125-130 miles of estimated range on Extended charge. During the winter I would use extended charge so that I would continue to see >100 miles of estimated range when I got into the car on a cold morning, so mentally, I never felt any different.

I was also surprised that the cells that were subjected to Extended charge and drove 60 miles lasted the same as Standard charge and driving 60 miles. This allows me to feel guilt free when I hit the extended charge button on the weekends and over the winter months.

_________________
Kohler Controller
Shoreline Blue
EVSE, AeroVironment 30A, 7.4kW
Reciever Hitch, CURT Class III Round Tube
Cargo Liner
Modified 120VAC EVSE to also accept 240VAC
Hood struts- Sokie Tech
JdeMO Level 3 Charging port
12.6kW PV system
VIN 1396
Austin, Texas


Top
 Profile  
 
 Post subject: Re: Battery Degradation
PostPosted: Fri Jun 13, 2014 12:14 am 
Offline
Site Moderator

Joined: Wed Nov 07, 2012 6:50 am
Posts: 1213
Location: San Jose, CA
Does anybody have a definitive explanation of why the charging cycle (regardless of whether standard or extended) includes a brief period of lower power charging for about 30 minutes at the end of a completed cycle? I notice this every time I charge, and even if the car is left plugged in fully charged over consecutive days while not using the car. I have speculated that this last amount of charging (or recharging) is for cell balancing purposes. You can see what I am talking about in Kohler's graph around 7:00am on April 30th.

_________________
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: Battery Degradation
PostPosted: Fri Jun 13, 2014 12:56 am 
Offline

Joined: Sat Mar 30, 2013 9:20 am
Posts: 694
Location: Seal Beach, CA
Dsinned wrote:
Does anybody have a definitive explanation of why the charging cycle (regardless of whether standard or extended) includes a brief period of lower power charging for about 30 minutes at the end of a completed cycle? I notice this every time I charge, and even if the car is left plugged in fully charged over consecutive days while not using the car. I have speculated that this last amount of charging (or recharging) is for cell balancing purposes. You can see what I am talking about in Kohler's graph around 7:00am on April 30th.
Best explanation I've heard is that it's thermal preconditioning of the pack just before a scheduled departure. I purposely set my departure timer much later than I'm actually going and use RavCharge to start my charges earlier, thereby avoiding this unnecessary power consumption outside of my super-off-peak window.

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


Top
 Profile  
 
 Post subject: Re: Battery Degradation
PostPosted: Wed Feb 24, 2016 1:08 am 
Offline

Joined: Wed Nov 14, 2012 9:50 pm
Posts: 4115
Location: San Diego
TonyWilliams wrote:
[battery] loss won't be linear, and I expect that I am at the point where the degradation should slow slightly, so maybe 10%-12% at 40,000 miles (assuming all the same as the past in terms of usage, heat, cycling, etc).

60,000 miles should be around 13% - 15% ending up at 100,000 miles at about 20% loss. From there, at some point, it will begin a more accelerated path to "End Of Life" at 70% capacity.


Eh, I'm not too bad at guessing! I'm at about 15% loss at 64,000 miles.

_________________
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: Battery Degradation
PostPosted: Sat Feb 27, 2016 5:32 am 
Offline

Joined: Mon May 13, 2013 6:15 am
Posts: 345
Location: Volcano, CA
i'm at about 5.5% at 44000 according to the "tony test". However i almost never use extended except when i intend to drive right away when it finishes charging.

_________________
--
2013 Shoreline Blue Pearl Rav4 EV #1634
2018 Tesla Model 3 Dual Motor, ER, EAP


Top
 Profile  
 
 Post subject: Re: Battery Degradation
PostPosted: Sat Mar 26, 2016 4:08 pm 
Offline

Joined: Wed Nov 14, 2012 9:50 pm
Posts: 4115
Location: San Diego
Bassman wrote:
TonyWilliams wrote:
Philly RAV4 EV wrote:
Bassman, have you had any major problems with you Rav. Do you have any pack degregation?



Could you perform this test ?

viewtopic.php?p=20518#p20518

Before the battery pack went bad at 96,000 miles, the mileage at 3.5 KWh was 126. So My battery was down by about 13.1% and that was charging to 100%, 5 days a week, twice a day for about 3 years.


I'm at about the same at 66,000 miles.

_________________
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: Battery Degradation
PostPosted: Thu Aug 25, 2016 6:27 am 
Offline

Joined: Mon May 13, 2013 6:15 am
Posts: 345
Location: Volcano, CA
so i ended up doing a reset on my last trip at 55K miles and got 140 miles on the GOM after the reset at a full charge.

Which i think is 4.2% degredation (140/146)

_________________
--
2013 Shoreline Blue Pearl Rav4 EV #1634
2018 Tesla Model 3 Dual Motor, ER, EAP


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 37 posts ]  Go to page Previous  1, 2, 3, 4

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