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Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Tue Aug 14, 2018 3:20 pm
by EVDRIVER
The parasitic losses on the M3 are exaggerated by those using an app too often, waking up the car and also using third party apps. Based on what I have seen the loads are lower than the newer S. The pack is very efficient and well designed. Of course just like the 12V battery issue on the M3 that never existed there is always something to blow out of proportion. Use of a 12V battery tender on any EV is easy if you hide the cable and the car will not run long charge cycles on the 12V and dramatically reduce losses.

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Tue Aug 14, 2018 9:03 pm
by SageBrush
EVDRIVER wrote: Use of a 12V battery tender on any EV is easy if you hide the cable and the car will not run long charge cycles on the 12V and dramatically reduce losses.
I'm unsure what you mean here. Are you saying you attach a 12v battery minder when you charge up the traction battery to reduce vampire losses ?

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Tue Aug 14, 2018 10:11 pm
by WetEV
finman100 wrote: Who would like to run the math on $$$ spent on a few kWh used to extend the life of a battery pack versus REPLACING the pack or entire car because it no longer gets people from A to B like it did when new?
Depends on climate. A TMS would never really cool my pack, as my pack is never warm enough to really need cooling. So $0.00 would be spent on kWh for TMS, or very close to it, and the battery life benefit would also be $0.00, or very close to it.

As battery cooling cost is linear with temperature, and battery life benefit doubles with every 10C warming, there there will be a climate warm enough to make a TMS worthwhile. Death Valley, for sure. Dubai, probably. Phoenix, Arizona as well. Probably not in Upstate NY, coastal Oregon, etc.

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Tue Aug 14, 2018 11:24 pm
by SageBrush
finman100 wrote: Who would like to run the math on $$$ spent on a few kWh used to extend the life of a battery pack versus REPLACING the pack or entire car because it no longer gets people from A to B like it did when new?
The reports of really obnoxious vampire drains (of 2 -4 kWh a day) are being resolved with a BMS firmware and OTA updates and my impression is that the fleet will settle down to ~ 10 watts per car at rest when the entire vampire thing gets ironed out. This is not required battery cooling.

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Wed Aug 15, 2018 5:40 am
by EVDRIVER
SageBrush wrote:
EVDRIVER wrote: Use of a 12V battery tender on any EV is easy if you hide the cable and the car will not run long charge cycles on the 12V and dramatically reduce losses.
I'm unsure what you mean here. Are you saying you attach a 12v battery minder when you charge up the traction battery to reduce vampire losses ?
No, when not using the car for a few days the 12V tender keeps the 12V charged, when not used most EVs will cycle the contactor and other systems for a 12V charge cycle, this is usually a minimum of 15 minutes or more. This process uses much more power than charging the 12V directly so the tender shortens these sessions and does not waste all the power of the other higher consumption loads that come on. Not to mention the 12V is not cycled so it lasts much longer.

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Wed Aug 15, 2018 5:44 am
by SageBrush
EVDRIVER wrote: No, when not using the car for a few days the 12V tender keeps the 12V charged, when not used most EVs will cycle the contactor and other systems for a 12V charge cycle, this is usually a minimum of 15 minutes or more. This process uses much more power than charging the 12V directly so the tender shortens these sessions and does not waste all the power of the other higher consumption loads that come on. Not to mention the 12V is not cycled so it lasts much longer.
Good to know.
How frequent in the Model 3 ?

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Wed Aug 15, 2018 5:55 am
by EVDRIVER
SageBrush wrote:
EVDRIVER wrote: No, when not using the car for a few days the 12V tender keeps the 12V charged, when not used most EVs will cycle the contactor and other systems for a 12V charge cycle, this is usually a minimum of 15 minutes or more. This process uses much more power than charging the 12V directly so the tender shortens these sessions and does not waste all the power of the other higher consumption loads that come on. Not to mention the 12V is not cycled so it lasts much longer.
Good to know.
How frequent in the Model 3 ?
I'm not sure I would need to check but enough times to make a difference. If there is no need to charge then it stops the cycle sooner.

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Wed Aug 29, 2018 12:09 pm
by dtam83
don't know about the "lack of oomph at highways speeds". I pass people pretty easily, 60 to 80 fairly quickly. definitely better than my old rogue and a corolla I rented a few weeks ago

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Wed Aug 29, 2018 12:58 pm
by LeftieBiker
dtam83 wrote:don't know about the "lack of oomph at highways speeds". I pass people pretty easily, 60 to 80 fairly quickly. definitely better than my old rogue and a corolla I rented a few weeks ago
I wasn't kidding when I wrote that I think they loaded the car up with people.

Re: IEVS: Consumer Reports Not Impressed By 2018 Nissan LEAF

Posted: Thu Aug 30, 2018 7:40 am
by DaveinOlyWA
dtam83 wrote:don't know about the "lack of oomph at highways speeds". I pass people pretty easily, 60 to 80 fairly quickly. definitely better than my old rogue and a corolla I rented a few weeks ago
yeah. read my comment. Unless its a "contender" its a dude to them. Recently, I was in a hurry (for some unknown reason) so I was in the left lane leaving work knowing I had to make a right turn onto the freeway in a few blocks. I punched it on the green and was shocked that I spun tires quite "well" and yes this was in Eco mode (mentioned for all who think that Eco mode has less power...)

Just illustrates how much more important tire rotation is in the new LEAF is all. 8-)