The result of a 10-year research effort, the dual-battery system combines a lithium-ion battery with a 12-volt lead-acid battery that could enable regenerative braking technology in non-hybrid vehicles for greater fuel savings.
Currently available on Ford’s hybrid vehicles, regenerative braking enables the battery to capture up to 95 percent of the electrical energy normally lost during the braking process for reuse. The system works in conjunction with Ford’s Auto Start-Stop, which seamlessly turns off the engine when a vehicle stops to save fuel. An advanced battery then powers vehicle accessories and systems in place of the engine until the driver begins to release the brake pedal, which restarts the engine.
Ford and Samsung SDI also are researching a longer-term ultra-lightweight lithium-ion battery that could one day render traditional lead-acid batteries obsolete. The research advances lithium-ion battery technology currently available on Ford’s electrified vehicles.
Lithium-ion batteries currently used in Ford’s electrified vehicles are 25 percent to 30 percent smaller than previous hybrid batteries made of nickel-metal-hydride, and offer approximately three times the power per cell.
The ultra-lightweight battery concept offers a weight reduction of up to 40 percent, or 12 pounds. Combining the battery with other weight reduction solutions, such as the Ford Lightweight Concept vehicle, could lead to additional savings in size and weight of the overall vehicle, as well as increased efficiencies and performance.
“We are currently expanding our Auto Start-Stop technology across 70 percent of our lineup, and this dual-battery system has the potential to bring even more levels of hybridization to our vehicles for greater energy savings across the board,” said Ted Miller, senior manager, Energy Storage Strategy and Research, Ford Motor Company. “Although still in research, this type of battery could provide a near-term solution for greater reduction of carbon dioxide.”
“Lithium-ion batteries are typically used in consumer electronics because they are lighter and more energy-dense than other types of batteries, which also make them ideal for the vehicle,” said Mike O’Sullivan, vice president, Automotive Battery Systems for Samsung SDI North America. “Battery technology is advancing rapidly and lithium-ion could one day completely replace traditional 12-volt lead-acid batteries, providing better fuel efficiency for drivers.”