Denso lithium-ion battery pack further increases the fuel efficiency of vehicles with stop/start systems

Denso has developed a lithium-ion battery pack that further increases the fuel efficiency of vehicles with stop/start systems. Denso’s new battery pack allows the stop/start system to use more regenerative power than current conventional systems that use a single lead-acid battery. Denso’s battery pack consists of a battery management unit and power supply control switch, as well as battery cells that are provided by a third-party source. The new battery pack is naturally air-cooled and therefore does not require a dedicated battery cooling system.


Denso’s new lithium-ion battery pack stores regenerated power and then supplies the stored regenerated power to the electrical and electronic components, such as the car navigation and audio systems. This reduces the power generation required by the alternator, which results in an overall load reduction on the engine and improves the vehicle’s fuel economy. Denso supplies the lithium ion battery pack, the TS starter and Cold Storage Evaporator on the Suzuki Wagon R, launched in market earlier this month. Denso’s new lithium-ion battery pack measures 200 × 178 × 70 mm and weighs 2.5 kg.