Which is more difficult, mild hybrid or strong hybrid?
3 Answers
Compared to strong hybrid, mild hybrid is more difficult. Mild hybrid system: The hybridization degree of mild hybrid systems is only within 10%. Generally, it refers to adding a belt to the starter motor of a traditional internal combustion engine to connect it with the engine. This motor is an integrated motor for power generation and starting, which can be used to control the engine's start-stop, avoiding the engine from entering idle state, thereby reducing some fuel consumption and emissions. Strong hybrid system: Strong hybrid systems use high-voltage starter motors, and most strong hybrid systems are dual-motor systems with a hybridization degree reaching or even exceeding 50%. They possess the idle stop system and brake energy recovery system that mild hybrids also have, but go further by enabling pure electric driving within certain speeds, not just assisting the engine, and can completely compensate for various inefficient operating conditions of gasoline-powered vehicles.
As a mechanic with years of experience, I think strong hybrids are much more challenging. The system is incredibly complex, with both an engine and a large battery plus motor, and the control system is like a maze. Just the diagnostic equipment for repairs is outrageously expensive, and it's both time-consuming and costly. Mild hybrids are simpler—basically just an auxiliary battery with minimal modifications to the original engine, and they can be easily handled with conventional tools. Strong hybrids have a higher failure rate, and replacing a single part might mean downtime for several days, doubling maintenance costs. Technically, strong hybrids demand precise integration, which even engineers find daunting—one mistake during assembly can render the whole thing useless. In contrast, mild hybrids have a lower barrier to entry, making them more suitable for widespread adoption. However, strong hybrids offer better fuel savings in the long run, though the process is far more demanding.
I've been commuting by car for over a decade, and I find mild hybrids much easier to handle. They drive just like regular cars, shutting off silently at red lights and restarting quickly with no learning curve. Strong hybrids aren't as straightforward—you have to adapt to switching between pure electric and hybrid modes, with acceleration that varies in intensity, which can confuse beginners. Plus, you have to worry about charging if the battery runs out. For daily commuting, mild hybrids are fuel-efficient and simple, while strong hybrids keep you preoccupied with battery levels and are more challenging to drive. However, if you enjoy tech-savvy features, strong hybrids can be fun, offering different driving modes—though it takes some mental effort to adjust. Overall, strong hybrids are more demanding for everyday driving.
