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as the penetration rate of new energy vehicles in china continues to increase, the advantages of new energy vehicles, such as high intelligence and cost-saving, have been accepted by many friends. however, low top speed has also become a problem for many new energy vehicles, especially plug-in hybrid and extended-range models. many car owners have reported that the plug-in hybrid and extended-range models they are driving have "stalled" on the highway!

the so-called "stall" is something we haven't heard much about in the automotive industry before. it often occurs in aviation accidents, that is, the aircraft is not fast enough to offset the downward gravity, causing the aircraft to fall rapidly. what everyone is talking about now is the "stall" of plug-in hybrid and extended-range vehicles on the highway, which is similar. that is, under certain circumstances, when the accelerator pedal is pressed, the vehicle does not increase the speed as the driver expects, but the vehicle speed does not increase, or even drops.

when plug-in hybrid and extended-range vehicles experience "stall", it is usually because the vehicle's power battery is low and the driver's "required" speed is relatively high. for example, when the power battery has less than 10% power left, the owner still hopes that the vehicle's speed can be quickly increased to 150km/h. at this time, some plug-in hybrid and extended-range vehicles will experience "stall", that is, the accelerator pedal is pressed, but the vehicle speed cannot be increased, and some models even directly report a fault code?

why do we say above that "some" plug-in hybrids and range extenders will have such problems? the reason is that this is not a common problem! some plug-in hybrids and range extenders with relatively large engines and range extenders will not have such problems, such as those equipped with 2.0t turbocharged engines and 1.5t range extenders. only those equipped with small-displacement or low-power engines and range extenders will have similar problems.

so how to avoid it?

first of all, when driving on the highway, you still have to deliberately retain some power. for example, many models have the option of forced power conservation. when the vehicle is driving relatively smoothly and does not need high power output, you can use forced power conservation to keep the power of the power battery relatively in a relatively "safe" range. then when high power output or continuous high power output is required, such as when overtaking quickly or going up some longer slopes, the power output of the engine/range extender plus the output of the power battery can achieve a good acceleration effect.

secondly, if relatively extreme working conditions have already occurred, you should pay attention to the power of the power battery, because some small-displacement or low-power engines can only output so much power when the vehicle needs high power output, and the rest must be "compensated" by the power battery, but the power battery is relatively low and cannot provide compensation. therefore, in this case, you should reduce the speed early to give the engine/range extender some time to charge the battery, and don't wait until the vehicle directly enters the most extreme working condition.

finally, it is necessary to obey the road traffic speed limit prompts. the maximum speed limit on most of our domestic highways is 120km/h, so many manufacturers also develop and match the power according to this speed, and then develop some speed redundancy. in other words, even if there is no electricity, almost all plug-in hybrid and extended-range models can run at 120km/h without any problems, but if they run at 150km/h or higher speeds, the vehicle may not be able to handle it. therefore, we cannot put ourselves in dangerous situations in order to challenge the limits of the vehicle.

all in all, "stall" at high speed is a problem that may occur in some plug-in hybrid and range-extender vehicles equipped with small-power engines/range-extenders, but it is not a common problem. avoiding high-speed stall is relatively simple, which is to keep the battery at a relatively high charge while avoiding driving in extreme conditions for a long time. in particular, you should not knowingly reduce the charge to a very low level, or deliberately drive at a high speed and with high power.

of course, you can also buy a large number of plug-in hybrid and range-extender vehicles with large displacement and high power engines/range-extenders, which have almost no risk of stalling, such as the lynk & co 09em-p and yangwang u8. so far, there is no news about their stalling.