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Talk:EAA-PHEV

From SeattleEVA
Revision as of 19:41, 26 November 2005 by 67.161.32.214 (talk) (Prius Controller Questions)
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Post any comments, questions, or suggestions you may have to the discussion page, or view the Talk:EAA-PHEV page with the discussion link in the menu at the top of the page.

FAQ

These should be fleshed out and may eventually warrant their own page, for now they live here.

Other PHEV Projects

I think Dr. Frank of UC Davis and his team of students have done numerious similar projects. I'm aware of a few other people who have added additional battery capacity to Prii, although they did not grid-recharge, those projects are rather close to becomming PHEV projects. I'll try to find those and list them here, feel free to help. --Rjf 17:17, 26 Oct 2005 (CDT) I almost forgot about some of these.


Pollution & Climate

Need links for items addressing BEV/ICE Pollution (Tailpipes and smokestacks)

Energy Effeciency

Need links for items addressing well to wheel, pump to pavement, or cradle to grave energy effeciency.

Plugging in

It takes but a few seconds to plug in once you reach your destination. Though at the gas pump you need to wait arround and watch the thing, make sure it doesn't overflow, noone takes the prescious juice on your dime. The more you plug into an electrical outlet the less time you have to spend plugging into oil and gas.

Prius Controller Questions

Here are some questions from Richard Himley, Anyone want to take a stab at a reply? I'm not familiar enough with the Prius to do this justice.

Adios,

Jerry Pohorsky


Jerry,

I just looked at the EAA-PHEV document from Seattle. From that document I would like to have more information about the battery management computer and the hybrid controller. Here is my current list of questions:

How do your determine SOC? Is it by amp-hr used or is there some other sensor? Do you have the same capability with the battery pack? One statement is to keep the BOC’s indicated SOC at 80% until we can have significant braking? What is the actual SOC for regenerative braking to be significant and what does significant mean? Why do you keep the indicated SOC between 70% and 80% until the real SOC is near its lower limit? What is that lower limit and how do you know what that value is? What value of SOC for the battery pack is that value which causes a complete cycle of charging? Is that a hard limit or is the number of charges dependent on how far you discharge the batteries? I really don’t have a quantitative measure of the statement "bad for the battery." I know this refers to cycles of charging but it hasn’t been quantified. Not wasting gasoline is a good idea. But might it not be better to waste some in a trade for getting more cycles out of the battery? Also, the controller is stated to "work to discharge the battery" when SOC is above 60%. Does this mean that the Prius is in EV only mode or is there a quantified ratio of gasoline to electric? Statement is made (I think) that EV-only mode is set when all the following is true: Speed < 34 mph Power request (accelerator position) <120 SOC > 49% And a few others What is the ratio of gasoline to electric when any one of these is not met? It sounds like it is controlled by only the SOC, but I’m not sure.

Richard

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