The era of new energy vehicles has come, and electric vehicles are gradually replacing traditional fuel vehicles, which does not seem to be completely environmentally friendly and efficient. When you step on the gas pedal on the highway, how can that proud big battery suddenly "get water" and become an electric monster?
When an electric car is running at high speed, why does the power consumption skyrocket? In stark contrast, oil trucks are driving on high-speed roads, showing a level of energy consumption that is "at ease". The difference between these two powertrains is really puzzling. Today, let's clear the fog and explore the truth.
For insight, let's start with traditional combustion vehicles. The key to the smooth fuel consumption of a gasoline engine at high speed cruising is that it has an "optimal efficiency zone". To put it simply, the engine will reach its optimal combustion state within a certain speed range, efficiently converting most of the energy into power output.
Once you enter this "thrifty mode", fuel consumption will naturally be reduced to a minimum. In urban conditions, frequent start-stop, acceleration and deceleration can drive the engine away from ideal conditions and waste more fuel unnecessarily. Therefore, oil trucks can indeed "maneuver" on the highway.
When it comes to electric vehicles, the situation is very different. The most important feature of this new powertrain is its high power conversion efficiency at low and medium speeds. But then the problem arises, when the demand for power increases and the speed of the vehicle increases to a certain level, the energy loss of the motor also increases dramatically.
One of the main reasons for this is that the motor needs more current to maintain operation at high speeds. However, it is inevitable that there will be some losses in the transmission of electrical energy, especially at high power conditions. Some of the electrical energy is forced to escape in the form of heat, which is equivalent to waste.
At the same time, the temperature of the battery rises to meet the demand for discharge. Sadly, this heating increases the internal resistance of the battery, which in turn reduces the efficiency of energy output. To curb this problem, the "thermal management system" on the electric vehicle has to step in, and the system itself consumes energy.
On the whole, multiple factors such as current loss, temperature rise, and energy consumption of additional systems have jointly created the "gluttony" performance of electric vehicles at high speeds. In contrast, the oil truck does not need to consider such a complex energy flow problem, and it is naturally much more comfortable.
So, how can we effectively alleviate the high-speed power consumption of electric vehicles? At present, the mainstream practice in the industry is to start improving at the three levels of motor, battery and power supply system.
It has an advanced 800V high-voltage power supply system in the whole area, which can effectively reduce the required current, thereby reducing power loss. In addition, the use of oil-cooled motors also helps to better control the temperature and reduce internal resistance. In addition to the motor itself, the quality of the battery pack also determines the thermal management performance of the vehicle.
It may be a wiser choice to choose a new energy model with a trustworthy brand and advanced battery technology. Some automobile manufacturers have spared no expense, from battery cells to modules to the whole package, all of which have adopted an integrated self-production approach, in order to have sufficient control over the performance of the battery.
Some people may say that power consumption is indeed high at high speeds, but electric vehicles are still environmentally friendly after all. In fact, the level of energy utilization is an important criterion for judging the environmental protection of a model. If a large amount of power battery power is wasted, what environmental protection can this model have?