High HV Battery Temp and Cooling fan

p626808 · 09-19-2007, 09:05 AM

Hi all,

Had a situation with the prius yesterday.
Started it up after it sitting for about an hour.
Had the canview on..
Battery temp was 118-120F
and it was not letting full amps into the battery.

I went home.. about 5 miles from where I was.. and no change in temp.

I parked.. and then went to the vent in the back seat..
And felt cool air.. either comming in or out? and the noise of the fan going..

But it did not seem to be cooling anything.

It there another vent to the outside where the air would come out.. so the battery would cool down?
Want to see if it is blocked... never had a temp that high.. and stay that high before..

Worried it might meltdown or something..

Got 120K on the car now.. too early for a new battery..lol

any insight would be appreciated..

Thanks,

Scott

qbee42 · 09-19-2007, 12:06 PM

The cooling fan pulls air from the inside and pushes it out of the car.

Tom

p626808 · 09-19-2007, 02:07 PM

<div class='quotetop'>QUOTE(qbee42 @ Sep 19 2007, 12:06 PM) [snapback]514796[/snapback]</div>

Quote:

The cooling fan pulls air from the inside and pushes it out of the car.

Tom
[/b]

Kinda of figured that.. but where does it exit the vehicle?

Anyone?

Scott

naterprius · 09-19-2007, 02:45 PM

Under the left rear corner of the car. Lift the cargo cover, pull the mini cover in that corner, remove the box, and feel the rubber flap.

Voila. You found the "Body Exhaust". It's on every car. Without it, drawing in fresh air wouldn't work so well.

FYI, my Trooper has visible Body Exhaust vents. Most cars have them hidden.

Nate

**efusco** · 09-19-2007, 04:02 PM

While performance drops a little at 120F you're in no danger of harming the battery. The battery is a very large thermal mass and won't heat up or cool off very quickly. Had your drive been 20-30 miles with the AC running in the car you'd have begun to see the temperture begin to settle down.
Think of it this way...if you'd not have had the CAN-View you'd have never known the battery was hot, there would not have been any warning lights or anything and you'd have not lost a moment's sleep on the matter.

p626808 · 09-20-2007, 08:22 AM

<div class='quotetop'>QUOTE(efusco @ Sep 19 2007, 04:02 PM) [snapback]514927[/snapback]</div>

Quote:

While performance drops a little at 120F you're in no danger of harming the battery. The battery is a very large thermal mass and won't heat up or cool off very quickly. Had your drive been 20-30 miles with the AC running in the car you'd have begun to see the temperture begin to settle down.
Think of it this way...if you'd not have had the CAN-View you'd have never known the battery was hot, there would not have been any warning lights or anything and you'd have not lost a moment's sleep on the matter.

[/b]

Thanks Evan for the picture.. will check to see if there are any problems with the vent..
It has cooled down over the last 2 days.. was down to 75 this AM..

I also noticed this with the can view..
I used to get the 125 amp full output at a battery temp of 77 degrees F
This morning.. that did not happen 'till 82 degress f

Five degrees higher.... I did just recently get the can-view updated..
Could that be the difference.. or could it be something else?

Yeah I know.. I'm paranoid..

Scott

patsparks · 09-20-2007, 08:39 AM

Please excuse my ignorance but I wouldn't have thought 120 degrees F was all that high for a battery, only a few degrees more than ambient in summer here and many places with mid latitude climates.

Does anyone have a graph of battery performance V temperature?

ken1784 · 09-20-2007, 09:42 PM

<div class='quotetop'>QUOTE(patsparks @ Sep 20 2007, 09:39 PM) [snapback]515195[/snapback]</div>

Quote:

Does anyone have a graph of battery performance V temperature?
[/b]

The chart below came from following site...
http://www.peve.jp/e/hevjyusi.html

Ken@Japan

09-19-2007, 09:05 AM	#1
p626808 Senior Member Join Date: Mar 2004 Location: NJ Posts: 245 My Car: 2010 Prius Model: V Package: Adv. Technology Thanks: 3 Thanked 1 Time in 1 Post Friends: 0	Hi all, Had a situation with the prius yesterday. Started it up after it sitting for about an hour. Had the canview on.. Battery temp was 118-120F and it was not letting full amps into the battery. I went home.. about 5 miles from where I was.. and no change in temp. I parked.. and then went to the vent in the back seat.. And felt cool air.. either comming in or out? and the noise of the fan going.. But it did not seem to be cooling anything. It there another vent to the outside where the air would come out.. so the battery would cool down? Want to see if it is blocked... never had a temp that high.. and stay that high before.. Worried it might meltdown or something.. Got 120K on the car now.. too early for a new battery..lol any insight would be appreciated.. Thanks, Scott __________________ Scott 2010 Blue Ribbon Metallic #V Advanced Tech Package

09-19-2007, 04:02 PM	#5
efusco Troll Slayer Join Date: Nov 2003 Location: Nixa, MO Posts: 17,231 My Car: 2004 Prius Model: Package: #9 Thanks: 49 Thanked 249 Times in 148 Posts Friends: 37	While performance drops a little at 120F you're in no danger of harming the battery. The battery is a very large thermal mass and won't heat up or cool off very quickly. Had your drive been 20-30 miles with the AC running in the car you'd have begun to see the temperture begin to settle down. Think of it this way...if you'd not have had the CAN-View you'd have never known the battery was hot, there would not have been any warning lights or anything and you'd have not lost a moment's sleep on the matter. __________________ Evan E. Fusco, MD "It's a damn poor mind that can only think of one way to spell a word." -Andrew Jackson

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09-19-2007, 12:06 PM	#2
qbee42 Senior Member Join Date: Mar 2006 Location: Northern Michigan Posts: 10,477 My Car: 2006 Prius Model: Package: #7 Thanks: 95 Thanked 389 Times in 290 Posts Friends: 10	The cooling fan pulls air from the inside and pushes it out of the car. Tom

09-19-2007, 02:45 PM	#4
naterprius Senior Member Join Date: Mar 2004 Location: USA Posts: 1,831 My Car: Other Non-Hybrid Model: Package: N/A Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Under the left rear corner of the car. Lift the cargo cover, pull the mini cover in that corner, remove the box, and feel the rubber flap. Voila. You found the "Body Exhaust". It's on every car. Without it, drawing in fresh air wouldn't work so well. FYI, my Trooper has visible Body Exhaust vents. Most cars have them hidden. Nate

09-20-2007, 08:39 AM	#7
patsparks An Aussie perspective Join Date: Jul 2007 Location: Adelaide South Australia Posts: 9,229 My Car: 2004 Prius Model: N/A Package: Base Thanks: 124 Thanked 181 Times in 139 Posts Friends: 33	Please excuse my ignorance but I wouldn't have thought 120 degrees F was all that high for a battery, only a few degrees more than ambient in summer here and many places with mid latitude climates. Does anyone have a graph of battery performance V temperature?