Hybrid Battery Run Down to Zero in Mountain Driving - Avoid? - Toyota Prius Forum : Prius Online Toyota Forums
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post #1 of 15 (permalink) Old 08-07-2006, 11:46 AM Thread Starter
 
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Default Hybrid Battery Run Down to Zero in Mountain Driving - Avoid?

HI, I am fairly new to this thing. I have a #6 in Blue and have logged about 1500 miles. Yesterday I drove for the first time in the Mountains and on a short trip (14 miles) up a canyon, I ran the Hybrid battery all the way down to a single bar. I stopped and allowed the engine to recharge for about 5 minutes. I took off again and promptly ran the battery down again.

Is there a way to drive Prius in the mountains without need for stopping every 10 miles?

Thanks
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post #2 of 15 (permalink) Old 08-07-2006, 12:02 PM
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Heh.

You don't have to stop when the battery indicator gets low.
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post #3 of 15 (permalink) Old 08-07-2006, 12:05 PM
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Yeah.. the car is smart enough to recharge the battery, etc. Just keep driving

- Phish Phood, Los Angeles, California
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post #4 of 15 (permalink) Old 08-07-2006, 12:18 PM
 
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Default Re: Hybrid Battery Run Down to Zero in Mountain Driving - Av

Quote:
Originally Posted by pelly
HI, I am fairly new to this thing. I have a #6 in Blue and have logged about 1500 miles. Yesterday I drove for the first time in the Mountains and on a short trip (14 miles) up a canyon, I ran the Hybrid battery all the way down to a single bar. I stopped and allowed the engine to recharge for about 5 minutes. I took off again and promptly ran the battery down again.

Is there a way to drive Prius in the mountains without need for stopping every 10 miles?

Thanks
No.. you don't have to do that. The battery meter (State of Charge - SOC) only shows 20% to 80% of the battery's SOC. So, even when there is NO BARS left, the battery has about 20% left. The computer will never let it go below that so don't get obsessive about trying to baby the battery - the computer will do that for you. Just drive!!!
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post #5 of 15 (permalink) Old 08-07-2006, 04:09 PM
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you would only need to pull over to "charge" the hybrid battery on such an uphill climb if you found that you didn't have enough power for your liking using the gasoline engine by itself.

If you've managed to lower the charge of the hybrid battery enough (steep enough climb for long enough, heavily loaded car and high enough speed), you'll be driving on the gasoline engine only (which will be both powering you up the mountain and recharging the hybrid battery), which you may find to be too slow for your tastes (but most people report that they can still pass the big trucks as needed, as you really don't need to be going up that fast...) You may not have the acceleration that you're used to, though.

As long as you stay away from extended use in N or IG-ON, you don't have to worry about the battery icon on the Energy Monitor. It's all eye-candy, as it isn't fully representative of what's going on (not representative of the actual SOC, just the "useful" SOC), and you cannot really do much to affect it (the car will take care of itself and handle recharging as needed by running the gasoline engine more or not using the hybrid battery as often).




-- Michelle Vadeboncoeur, [email protected]
2001 Aqua Ice Opalescent
2004 Black BC
fuel stats: http://www.kluge.net/~felicity/prius.php
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post #6 of 15 (permalink) Old 08-07-2006, 10:43 PM Thread Starter
 
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Default cool, Thanks for all the input

Thanks everyone for the input. It makes sense really, I'm just not used to the MFD and all its nuances just yet. Time will tell. I was worried that I would become stranded -

Again, thanks.

MP
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post #7 of 15 (permalink) Old 08-08-2006, 04:28 AM
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Default don't worry about it

I second the other's posts on this subject. Don't worry about it.

Apparently, according to http://privatenrg.com/#Full_SOC, it seems that even at 1 purple bar, there's 40-44% charge left. I've definitely gotten it down there while stuck in traffic in a parking structure, and the ICE will kick in.

06 white Prius package #7; 04 Daytona Blue Nissan 350Z Enthusiast
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post #8 of 15 (permalink) Old 08-08-2006, 08:52 AM
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I thought the bottomed out SOC was 40%, not 20%, but I haven't found any official info on this.

Anyway, the engine is capable of producing 76HP at 5000 RPM. At low SOC, the engine may appear to be racing, but it will get you there.

Looking at the engine displacement, my Saturn SL2 had about the same.

EDIT: 1999 SL2 had 100 HP, with 1.9L displacement. Prius has 1.5L.
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post #9 of 15 (permalink) Old 08-08-2006, 09:40 AM
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Default Re: cool, Thanks for all the input

Quote:
Thanks everyone for the input. It makes sense really, I'm just not used to the MFD and all its nuances just yet. Time will tell. I was worried that I would become stranded -

Again, thanks.

MP
.
.
.
.Just remember MRV's post. "The MFD is only "eye candy" and not meant in any way to be used to operate the Prius. All you need with this car are the instruments provided and the large group of "idiot lights" furnished!
.
.



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post #10 of 15 (permalink) Old 08-08-2006, 12:33 PM
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Quote:
Originally Posted by DanMan32
I thought the bottomed out SOC was 40%, not 20%, but I haven't found any official info on this.
Yes, the measured amounts differ between the NHW11 and the NHW20 as to what their displayed bottom point is in comparison to the actual battery state of charge. There's nothing officially printed about it to my knowledge, just an approximate hand-waving based on various users' measured results.




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2001 Aqua Ice Opalescent
2004 Black BC
fuel stats: http://www.kluge.net/~felicity/prius.php
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