I've heard there are reports from overseas where hybrids being used as taxis have over 400k miles without battery failure. I'm guessing these are being used in warmer climes.

Does anyone know if cold weather would shorten the life of the traction battery? Should any precautions be taken, like plugging in an electric blanket around the battery area in winter?

It just seems that temp swings would be hard on this device given all it is asked to do.

Heat is the #1 enemy of any chemical battery.

Granted that ambient temperature (high and low) has a detrimental effect on all chemical batteries, The Prius has been operating for MANY years in all climes with VERY FEW battery problems.

The worst temperature problem for the traction battery is heat. That's why there is a vent on the rear shelf. (In that vent are, there is also a fan to keep the battery cool.)


BTW, in the northern areas, the do use heaters. Not for the batteries, but for the engine (don't know if it's for coolant, oil or engine block).

John


2007 TCH -- Desert Sand, Bisque -- Original Equip: Leather Seats; NAV; Moonroof; Heated Seats
Completed Mods: Moved the side "HYBRID" emblem/badge to trunk lid; Mud Guards (Colored); Back-up Sensors; Door sill protector; ScanGauge II; Front Bra (Clear LLumar); Window Tinting (40 % Charcoal LLumar); Rear Deck Lid Spoiler
Mods in progress: None
Future mods: Rear bumper appliqué, Sliding Center Armrest

A lot of Prius taxis are running in Vancouver, Canada.
I believe it is not warm, especially in winter.
http://www.msnbc.msn.com/id/8839690/

Ken@Japan