[ausev] Prius Battery Datasets from Genisys Scan System.

[Dan Petit]

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>    1. Prius batteries? (Brian Lasseter)
>    2. http://www.abc.net.au/news/newsitems/200607/s1687883.htm
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>    3. Re: Prius batteries? (John Allen)
>    4. Re: Prius batteries? (Gil Dawson)
>    5. Re: http://www.abc.net.au/news/newsitems/200607/s1687883.htm
>       (Brian Lasseter)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Mon, 23 Feb 2009 12:28:09 -0600
> From: Brian Lasseter <blasseter.cmpe01 at gtalumni.org>
> Subject: [ausev] Prius batteries?
> To: AustinEV News Announcements and General Discussion
> 	<ausev at austinev.org>
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> 	<2b3d5a440902231028i35fcedfbx78137579731f8775 at mail.gmail.com>
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> Does anyone know the charging characteristics of a Toyota Prius battery pack?
>
> A friend of mine replaced some bad cells, but now needs to charge up
> the pack so that the Toyota computer is happy.
>
>
>   











 From Dan Petit.  Feb 24th, 8;55pm

I had the opportunity several years ago to scan a Prius which had the 
Hymotion pack installed.
The battery blocks were closely monitored by the Hybrid Battery 
subroutine.  It is likely that if any replacement blocks are installed, 
their voltage should match the remainder of the pack.  You can not 
upgrade a weaker block to match the remaining blocks, but you might be 
able to downgrade the charge of a better-condition block to the 
remainder of the blocks. 
This is easily monitored with the appropriate model year authorization 
from Toyota within the pack. However,  if the Hybrid Battery subroutine 
decides to "sequester" all datum, then access has been denied due to OEM 
pre-conditioned safety protocols.
  The 12 volt battery is also critically important in that the 
"conductance" as easily measured with the Genisys for that 
authorization-year must be generally as good as a two year old or newer.
Honda traction batteries are also dependent on a minimum functional 
"conductance" value in order that the main traction battery be recharged 
via regen.   The Honda system is superior in that if the traction 
battery indicator does not go above the two or three lowest "state of 
charge" increments, then it is likely time for a new 12 volt battery.
  My advice is to first check the 12 volt battery to make sure that the 
case date is no older than 3 calendar years.   It may actually be 
completely "dead" and you would not otherwise know it in a Prius except 
for other electrical anomalies.
Dan Petit.