Well, first off, hybrids actually have two batteries. They have a regular 12-volt starting battery—much like a regular car—that is used for the main power bus (e.g. lights, horn, stereo) and in some instances, for starting the internal combustion engine. This battery is generally stored in the engine bay. The second battery is the much larger high voltage battery bank that powers the electric drive motor.
This battery bank actually consists of many, many small low voltage cells that are connected together in series to develop the necessary high voltage that is required to operate the electric drive motor systems. This bank is then stored in a controlled environment “hold” within the chassis of the vehicle where it is protected from exposure, as well as maintained at optimal operating conditions.
More Hybrid Information:
Hybrids 101
Why is electricity an alt fuel? How exactly do mild, full and plug-in hybrids work? Plus FAQs about hybrids.
Hybrid Buying Guide
Check out the photos and test drives of current hybrid models, plus the lowdown on up-and-coming models.
Hybrid Maintenance and Safety Issues
Get the scoop on hybrid maintenance: from routine maintenance and professional repairs to safety issues and “beware the orange.”
Hybrid Tax Credits & Rebates
They go hand-in-hand: reduce your taxes and greenhouse gas contribution when you buy a hybrid vehicle.
Learn More at Hybrid Central
More Frequently Asked Questions about Hybrid Vehicles