The 2009 Mercedes-Benz S400 Hybrid: Pioneering Lithium-Ion Battery Technology in Cars
This 2009 Mercedes Hybrid Was The First To Use This Tech We Now Take For Granted
Image: Jalopnik
The 2009 Mercedes-Benz S400 BlueHybrid was the first mass-produced hybrid vehicle to utilize lithium-ion batteries, which offered significant advantages over previous nickel-metal hydride batteries. This innovation improved fuel efficiency and reduced CO2 emissions, marking a significant step in hybrid technology.
- 01The S400 BlueHybrid featured a 3.5-liter Atkinson-cycle V6 engine paired with a small electric motor, achieving a combined output of 295 horsepower.
- 02It was the first hybrid to use lithium-ion batteries, which are lighter and more energy-dense than nickel-metal hydride batteries.
- 03The vehicle's electric motor provided additional power and recaptured energy during deceleration, enhancing overall efficiency.
- 04The S400 Hybrid achieved an EPA-estimated fuel economy of 19 mpg in the city and 25 mpg on the highway, outperforming the gasoline-powered S550.
- 05Prior to the S400, only two lithium-ion powered vehicles existed, both of which were fully electric and had limited production.
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The 2009 Mercedes-Benz S400 BlueHybrid marked a significant milestone in automotive history as the first mass-produced hybrid vehicle to utilize lithium-ion battery technology. This advancement offered several benefits over the older nickel-metal hydride batteries, including reduced weight, increased energy density, and longer life cycles. The S400 was powered by a 3.5-liter Atkinson-cycle V6 engine, augmented by an electric motor that contributed an additional 20 horsepower and 118 lb-ft of torque, resulting in a total output of 295 horsepower. The hybrid system allowed for energy recovery during deceleration, enhancing fuel efficiency to an EPA-estimated 19 mpg in the city and 25 mpg on the highway. This made the S400 the most fuel-efficient S-Class model available at the time. Prior to the S400, only two lithium-ion vehicles existed, both of which were fully electric, highlighting the innovative leap Mercedes-Benz took in integrating this technology into hybrid vehicles.
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