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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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#10 of 669 Re: Michigan firm settles patent dispute over batteries [gagrice] by usbseawolf2000 Jul 07, 2004 (7:55 pm)
Replying to: gagrice (Jul 07, 2004 7:45 pm) " Batteries of all kinds have gone up in price no matter what the rest of the Electronics market is doing."   Consumer electronic AA Nimh rechargable battery prices has been going down since it was introduced. Not only the price, the capacity had gone up as well. When they came out they had 1500 mah rating(higher is better). Now, they have 2400 mah batteries for less than what 1500 mah used to cost!   Dennis Replies to this message: gagrice (Jul 07, 2004 8:14 pm) usbseawolf2000 (Jul 07, 2004 8:21 pm)
#11 of 669 Memory Effect by usbseawolf2000 Jul 07, 2004 (8:11 pm)
Yesterday during the chat, someone mentioned that NiMH batteries do not have memory effect. That issue needs to be cleared up in detail.   Short answer: NiMH do have memory effect but at a very slow rate.   Long answer: Compared to AA NiCD batteries, AA NiMH batteries suffers much less of the memory effect. AA NiMH retains/remembers 80% of it's capacity after 500 cycles. Hybrid Electric Vehicle NiMH batteries' memory is 20 times better. They have 10,000 cycles until it is reduced to 80% of the original capacity. That is to show the rate of the memory effect. The battery is still completely functional after that point. Replacing the pack is up to the owner if he/she wants to regain efficiency of a new hybrid car.   Dennis
#12 of 669 Re: Michigan firm settles patent dispute over batteries [usbseawolf2000] by gagrice Jul 07, 2004 (8:14 pm)
Replying to: usbseawolf2000 (Jul 07, 2004 7:55 pm) All I know is the NiMH batteries for my Canon S10 camera are about 25% higher now than they were when I bought the camera 3 1/2 years ago. I bought a cheaper generic battery and it lasted less than 6 months. All batteries are not created equal. Replies to this message: usbseawolf2000 (Jul 07, 2004 8:21 pm)
#13 of 669 HEV battery life by usbseawolf2000 Jul 07, 2004 (8:17 pm)
The life of HEV battery should not be measured with the miles it is driven but under what condition.   For example, during highway cruising, the battery is rarely used. Another extreme case is, short and hilly blocks in San Francisco with stop signs at every corner. The battery would use up plenty of recharge cycles in this situation, only if you accelerate hard enough so that the battery supply power to the main electric motor.   Dennis
#14 of 669 Re: Michigan firm settles patent dispute over batteries [usbseawolf2000] [gagrice #12] by usbseawolf2000 Jul 07, 2004 (8:21 pm)
Replying to: gagrice (Jul 07, 2004 8:14 pm) "All batteries are not created equal."   Very true. More importantly, not all chargers are created equal either! It is the cheap charger that damages the battery by charging too fast and over heating the battery. Overcharging the battery when it is full also damages the battery.   The charger in the Prius is very intelligent and powered by 32-bit CPU. There are temperature sensors to protect the battery pack with active cooling system. It is also packed with the latest charging technology to prolong the battery life.   Dennis
#15 of 669 Computer Control by djasonw Jul 08, 2004 (4:03 am)
According to what I've read, the computers manage the battery drain and so forth. What really kills these types of batteries is draining them down completely. The Prius computer does NOT allow this to happen. I have practiced this technique with cell phone and laptop batteries and it seems to work. Gagrice is correct regarding generics, they stink!
#16 of 669 Battery by nw1997 Jul 07, 2004 (10:19 am)
Can someone confirm this information. The cost to replace the Battery in the Prius is around $2,958.00. This is the battery that is in the trunk, in which is being constantly charged. The life expect. is 8/100K miles. Replies to this message: midnightcowboy (Jul 07, 2004 10:38 am) 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)
#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)

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