[ausev] Series Hybrid Plug In Details

[Marc Kohler]

EV World just answered it. 
http://www.evworld.com/view.cfm?page=article&storyid=1165

"The car's computer controls monitor the state of charge (SOC) of the 
battery pack making sure it never drops below 30% SOC and never exceeds 80% 
SOC. This is to protect the battery and ensure a long cycle life. When the 
battery drops to 30 %, the IC engine turns on and through the onboard 
electric generator provides sufficient electric current to both drive the 
vehicle and recharge the battery pack. Once the pack is back to 80% SOC, the 
engine turns off and the vehicle runs off the power stored in the battery."


If you only use 50% of the battery pack's capacity, you only have to 
recharge 8 kWh which can be done with a standard wall socket/charger in 6.5 
hours.

Now my question is, how will they ensure balancing if they never fully 
charged the pack?

Marc Kohler






----- Original Message ----- 
From: "Marc Kohler" <mkohler at austin.rr.com>
To: "AustinEV News Announcements and General Discussion" 
<ausev at austinev.org>
Sent: Monday, January 08, 2007 8:42 AM
Subject: Re: [ausev] Series Hybrid Plug In Details


> How does GM charge a 16 kWh battery pack using a 110V-15A plug in 6.5 
> hours?
>
> http://media.gm.com/servlet/GatewayServlet?target=http://image.emerald.gm.com/gmnews/viewpressreldetail.do?domain=137&docid=31659
>
> Marc Kohler
>
>
> ----- Original Message ----- 
> From: "Mark Farver" <mfarver at mindbent.org>
> To: "AustinEV News Announcements and General Discussion"
> <ausev at austinev.org>
> Sent: Monday, January 08, 2007 7:56 AM
> Subject: Re: [ausev] Series Hybrid Plug In Details
>
>
>> Marc Kohler wrote:
>>>  The battery pack's volume is 100
>>> L, one-third as much as the lead-acid batteries
>>> in GM's 1990s-issue electric car, the EV1. GM's
>>> targeted maximum weight for the pack is 180
>>> kilograms (400 pounds).
>> It is interesting that they compare the LiOH specs against the Lead Acid
>> EV1.  The NiMH EV1 had a battery pack of close to the same volume as the
>> Lead Acid version, but got a 120 mile range.   So for 1/3 the volume,
>> they get 1/3 the Range on Lithium. Lithium will look good for weight,
>> but I wonder why GM is struggling with a technology they (and no other
>> car manufacturer) has experience with instead of going with their
>> excellent NiMH technology.  (Even sold to Texaco, I assume GM kept a
>> license to the Ovoinics technology)
>>
>> Mark
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