HV battery balancing

Roy from Canada here to try and help.

If you get the minivic software and cable and an xt computer it will allow you to see the battery modules under load as you drive ( the modules are monitored as 2 in series, so you see them as pairs not individual modules). A pair that drops lower the the other pairs by 1.2 v or less indicates a bad module in that pair, replace both modules or test to find the bad one. I have had the experience of one bad module, replaced it with a better one and reassembled the pack and it has worked OK.

 

from page 25 of http://techno-fandom.org/~hobbit/cars/TIS/ileaf/toyssc/toysspdf/sscsourc/2004/40g/40gtech.pdf

(d) Install the new bus bar module with the
2 new nuts.
SST #: 00002-11000-
01
Torque:
5.4 N·m (55 kgf·cm, 48 in·lbf)

Thank you ChapmanF

Follow up is there a similar document for generation 2 prius?

 

That particular document was for a special repair campaign that only the Gen 1 needed. So, there is no Gen 2 version of that exactly.

The other place you could have found all the specs was in the service manual, at techinfo.toyota.com, and of course you can find all generations there.

-Chap

 

I was told that a battery pack will balance its self after 100 200 miles is this true?