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The Great Hybrid Battery Debate

669 messages,  Last post on Apr 06, 2009 at 2:32 PM

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#17 of 669 Re: Battery [nw1997 #25] by midnightcowboy Jul 07, 2004 (10:38 am)
Replying to: nw1997 (Jul 07, 2004 10:19 am) The battery is modular and you won't have to replace all modules; the cost should be much less than $2958. The warranty is for 8 years 100,000 miles or 10 years 150,000 miles if you live in California. No one has any idea how long the battery will last; they just haven't been out that long and there is not enough statistical data gathered. Toyota has given people an ample warranty to alleviate their fears on this new technology. Anyone who says different doesn't know either and to play up to FUD (Fear Uncertainty Doubt) is not good forum or business practice.   If Hybrid battery life is your only concern, then I wouldn't worry about it and would go ahead buy and enjoy the new hybrid technology.   YMMV,   MidCow Replies to this message: redly_one (Jul 20, 2004 9:41 pm) john1701a (Jul 21, 2004 7:19 am) rfruth (Jul 21, 2004 1:19 pm) gagrice (Jul 22, 2004 12:24 pm)
#19 of 669 250 NiMH's 330 volt (DC?) in FEH by rfruth Jul 11, 2004 (3:54 pm)
- snip - The 30-kW Sanyo battery pack sits under the rear carpet and forms the cargo area’s load floor. Inside the thin metallic cassette sit 250 nickel-metal hydride D-cells wired in series and producing 330 volt. You read that right. D-cells,the same size as, but not interchangeable with, the ones found in flashlights. Unlike said flashlight, an external cooling vent in the driver’s side rear window is part of the forced-air thermal management system. In hot weather it draws excess heat away from the pack, while an electric heater warms the batteries when the temperature drops. Ford says the system can handle temperature extremes from -40°º F to +122°º F. http://www.autofieldguide.com/articles/070402.html Replies to this message: usbseawolf2000 (Jul 11, 2004 6:20 pm) rfruth (Jul 12, 2004 1:18 pm)
#20 of 669 Re: 250 NiMH's 330 volt (DC?) in FEH [rfruth] by usbseawolf2000 Jul 11, 2004 (6:20 pm)
Replying to: rfruth (Jul 11, 2004 3:54 pm) Each NiMH cell is 1.2 volts. If there are 250 cells, then the total is 300 Volts. The pack will need to have 275 cells to get 330 Volts.   Dennis Replies to this message: rfruth (Jul 12, 2004 1:18 pm)
#21 of 669 Re: 250 NiMH's 330 volt (DC?) in FEH [usbseawolf2000] by rfruth Jul 12, 2004 (1:18 pm)
Replying to: usbseawolf2000 (Jul 11, 2004 6:20 pm) An example of new math or... I wonder if the Escape will use AC motor(s) or DC ?
#22 of 669 by robertsmx Jul 12, 2004 (5:56 pm)
Why must NiMH batteries have 1.2V? Replies to this message: usbseawolf2000 (Jul 12, 2004 7:09 pm) gagrice (Jul 12, 2004 7:11 pm)
#23 of 669 Re: [robertsmx #22] by usbseawolf2000 Jul 12, 2004 (7:09 pm)
Replying to: robertsmx (Jul 12, 2004 5:56 pm) "Why must NiMH batteries have 1.2V?"   Because of the chemstry of the battery. The voltage varies with the state of charge of the battery but nominal voltage is commly accepted as 1.2 volts.   Dennis
#24 of 669 Re: [robertsmx] by gagrice Jul 12, 2004 (7:11 pm)
Replying to: robertsmx (Jul 12, 2004 5:56 pm) 1.2 volts is the inherent characteristic of a NiMH Cell.
#25 of 669 by robertsmx Jul 12, 2004 (7:22 pm)
Thanks both. Didn't know that, although I always wondered. I also know that the discharge characteristic is different from a typical alkaline battery (sustains voltage instead of losing it during the discharge). What limits the voltage though? In other words, a 9V NiMH battery isn't really a 9V battery (7-odd volts?), but what is the limiting factor? Replies to this message: usbseawolf2000 (Jul 12, 2004 8:00 pm) daysailer (Jul 19, 2004 9:03 am) eaa (Dec 28, 2005 9:50 pm) zoomzoooom (Jan 04, 2006 12:09 pm)
#26 of 669 Re: [robertsmx] by usbseawolf2000 Jul 12, 2004 (8:00 pm)
Replying to: robertsmx (Jul 12, 2004 7:22 pm) "What limits the voltage though? In other words, a 9V NiMH battery isn't really a 9V battery (7-odd volts?), but what is the limiting factor? "   Most 9V NiMH provide 8.4V. There are 7 1.2V cells connected in parallel. Some 9V NiMH use 8 cells to provide 9.6 volts. The trade off is in the capacity or the mAH.   The battery that will be in Highlander hybrid or RX400h is said to have twice the power of Prius. It is not clear if it will have 403.2 volts with 6.5 AH or 201.6 volts with 13 AH.   If you think electricity flow as a water pipe. The volt is how wide the pipe is and Amp per hour is how fast the water flows.   Dennis Replies to this message: daysailer (Jul 19, 2004 9:03 am)

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