DarkStar
Well-known member
Were you rockin' ECO mode?gasmiser1 said:One note: I wish the regen was more powerful on steep downhills. Even with light braking I'd like more regen to slow the car down.
Were you rockin' ECO mode?gasmiser1 said:One note: I wish the regen was more powerful on steep downhills. Even with light braking I'd like more regen to slow the car down.
I am curious how you came to this conclusion not that I am disagreeing with you. I have both a Leaf and a Prius myself and I am reluctant to come to the same conclusion if it is simply based on the display feed back that the Leaf and Prius gives to the driver.DaveinOlyWA said:have to agree with the regen statement. the Prius regens much more than the Leaf does. in fact, regen on the Prius in many driving situations can account for nearly 100% of any braking situation. the Leaf does not.
Spies said:I am curious how you came to this conclusion not that I am disagreeing with you. I have both a Leaf and a Prius myself and I am reluctant to come to the same conclusion if it is simply based on the display feed back that the Leaf and Prius gives to the driver.DaveinOlyWA said:have to agree with the regen statement. the Prius regens much more than the Leaf does. in fact, regen on the Prius in many driving situations can account for nearly 100% of any braking situation. the Leaf does not.
------------------------------------DarkStar said:Were you rockin' ECO mode?gasmiser1 said:One note: I wish the regen was more powerful on steep downhills. Even with light braking I'd like more regen to slow the car down.
I still don't know how much regeneration the Leaf can actually handle and it could be more or even less than the Prius.DaveinOlyWA said:I still have to say that the Leaf could be more aggressive with their regen
So, Prius can charge the battery at 15C during regen ?DaveinOlyWA said:Ok info from resident PriusChat stats expert.
Batt pack is 1.31 kwh with. 5 kwh usable. Defend up to 100 amps on 201 volt pack or about 20 kwh which is less than the Leaf max of 30?? Kwh but considering the huge size difference in battery packs I still have to say that the Leaf could be more aggressive with their regen
Can you explain that statement? If I am slowing to a stop light or going down hill, and the regen is not heavy enough to do the job, I'm going to be using friction brakes. That efficiency is 0%. Yes, I can see that at a higher C rate there is going to be more loss getting the energy into the battery. But surely the heat generated charging the battery is going to be less than the heat generated at the brakes.evnow said:A slow regen is likely more efficient than a faster regen.
At least that number matches up with your earlier stated 20 kW max regen in the Prius and 0.5 kWh usable capacity - that's a charge rate of 15C - that is only pushing the batteries about 8 times harder than the maximum allowable charge rate that Nissan allows (~50 kW during quick charge at lower SOC).DaveinOlyWA said:As far as the Prius. At max regen we could fully charge in 90 seconds to cover SOC. From 40-80%.
I'm sure that if you use AESC's "high power" cells instead of their "high energy" cells and only used 50% capacity instead of 90%, you could push the Lithium battery even harder than the NiMH battery with the same life expectancy (10 years, 150k miles).DaveinOlyWA said:Any max value would be for short durations. Now if the Prius allows it on NiMH and the Leaf does not on Li, is there a difference in the capacity each type can take with minimal degradation?
That is assuming the regen is constant. Not the case, only if you floor the break, Leaf will use friction brake exclusively. As you press the brake harder, it regens more, but after a point it starts including friction brakes. The idea is to slow down such that you use mostly the regen portion of the brake.planet4ever said:If I am slowing to a stop light or going down hill, and the regen is not heavy enough to do the job, I'm going to be using friction brakes. That efficiency is 0%.
No, I wasn't assuming constant regen. I was assuming, based on what others here had said, that the maximum regen possible on the LEAF was significantly less than on the Prius.evnow said:That is assuming the regen is constant. Not the caseplanet4ever said:If I am slowing to a stop light or going down hill, and the regen is not heavy enough to do the job, I'm going to be using friction brakes. That efficiency is 0%.
Thank you! I was getting worried. I'll now (try to) wait patiently for my car so I can see for myself.evnow said:I've to come down a fairly steep hill everyday. If I use Eco I don't need to use the brake at all to control the speed. Sounds like enough regen to me ...
DarkStar said:Were you rockin' ECO mode?gasmiser1 said:One note: I wish the regen was more powerful on steep downhills. Even with light braking I'd like more regen to slow the car down.
LakeLeaf said:DarkStar said:Were you rockin' ECO mode?gasmiser1 said:One note: I wish the regen was more powerful on steep downhills. Even with light braking I'd like more regen to slow the car down.
Remember, on the Prius it isn't the regen that really slows the car down on steep downhills. It's the engine braking. The Prius will continue to hold its speed even after the battery is completely topped off. The LEAF has no engine braking as it has no engine.
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