Sadly, the HV traction battery must be replaced as a whole, drop-in unit if defective... not even a Ford Authorized Technition is allowed to repair it.

Thus, there are no drawings, pictures, or schematics of what is really inside the sealed battery compartment.

So we are going to have to wait until some owner exceeds his/her warranty period, and has the guts to take one apart and post pictures.

I know I will be taking mine apart if/when I reach 150,000 miles and there is no chance of me loosing warranty status.

Just for Gary ( And I know he has already seen this... )
Under PinPoint Test LTC B1016 - Jump Start Control Module
Under "Normal Operation" it states the low voltage battery is used in an 8 minute process to HEAT and step up the voltage of the HV battery pack.

I have the CD-ROM so there's not an actual page number, but it is under Section 414-03.

-John