Toyota tests plug-in hybrid car
#21
Re: Toyota tests plug-in hybrid car
The 2001-2003 Prius has only 4 level bar graph, and it's control range seems the same, 40-80%.
Ken@Japan
Last edited by ken1784; 07-28-2007 at 11:17 PM.
#22
Re: Toyota tests plug-in hybrid car
Toyota's battery-charging algorithm is probably very complicated in order to correctly maintain its state of charge (SoC) inside their chosen range without suffering from any memory effect. Their patents on this are very detailed, and discuss many ways of monitoring and controlling it. ken1784's very interesting link shows that (at least for the Prius, and undoubtedly also for the TCH) the SoC display is decidedly nonlinear, in that fully 57% of the usable SoC is represented by bars #6 and 7 alone! No wonder the SoC display seems to spend most of its time in this range. This is probably also deliberate, so as not to alarm drivers by seeing the SoC continually going up and down. (This is rather like what they have done with the temperature gauge, which sits at the same reading for water temperatures from 60 to at least 90 degrees C.)
Stan
Stan
#23
Re: Toyota tests plug-in hybrid car
There is a promising new technology that should make all batteries obsolete.
http://www.sciencentral.com/articles...e_id=218392803
http://www.sciencentral.com/articles...e_id=218392803
#25
Re: Toyota tests plug-in hybrid car
I read something about a place in Austin, Texas that converts the Prius to a plug-in. I'm not sure of the cost but they open the battery charge up. I'm not sure just how much. They also swap out the battery pack to a larger one. Reports of up to 125 mpg. After all a 10 amp charge running all night would not use that much electricity.
#26
Re: Toyota tests plug-in hybrid car
chris_h — Yes, I'm saying that, from what I've read, the LiIon battery would have to use just half the charge fraction that a comparable NiMH battery could use. Like ken1784, I think the TCH's usable battery range (of 40%) is something like 40 - 80% of full charge. A comparable LiIon's usable range (of 20%) would then be something like 50 - 70% of its full charge.
Stan
Stan
Thanks for that clarification.
#27
Re: Toyota tests plug-in hybrid car
chris_h — Yes, I'm saying that, from what I've read, the LiIon battery would have to use just half the charge fraction that a comparable NiMH battery could use. Like ken1784, I think the TCH's usable battery range (of 40%) is something like 40 - 80% of full charge. A comparable LiIon's usable range (of 20%) would then be something like 50 - 70% of its full charge.
Stan
Stan
So, my bet is the Li-ion will be used 30-90% range. We'll see sometime in 2010.
Ken@Japan
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