What is the function of the 48V mild hybrid system in the Volvo S90?
2 Answers
The functions of the 48V mild hybrid system in the Volvo S90 include faster acceleration and reduced fuel consumption. Working principle of the mild hybrid system: The 48V mild hybrid system consists of three main components: an electric motor, a power battery pack (mainly lithium battery), and a voltage controller (DC-DC converter). It is used to power the air conditioning system, provide additional power assistance, and handle brake energy recovery. Advantages of the mild hybrid system: It can provide start-up assistance and additional power assistance during acceleration, improving the smoothness and responsiveness of the vehicle during acceleration. Additionally, fuel economy is another major advantage of the 48V mild hybrid system.
I've been driving a Volvo S90, and its 48V mild hybrid system makes daily driving much more worry-free. This system uses an electric motor to assist the engine during startup, making acceleration from traffic lights particularly smooth and fuel-efficient. Frequent stop-and-go traffic doesn't feel bothersome either—the slight shudder from traditional start-stop systems is completely gone, as quiet as reigniting after shutting down. In summer, when idling at a red light with the AC on, the engine stops but the cold air keeps blowing, powered by the 48V battery without needing to engage the engine. Braking and going downhill also recover energy to store in the battery, reducing fuel consumption by 1-2 liters per 100 kilometers, which adds up to significant savings over time. The system is simple to maintain, not as complex as plug-in hybrids, and the battery placement doesn't take up trunk space.
