How do new energy vehicles solve the heat dissipation problem?
Whether it is a pure electric vehicle or a variety of hybrid models, electric drive technology allows them to have better dynamic performance, and they can break hundreds of times in a few seconds. However, while bringing better power performance, the power system also faces the problem of heat dissipation. So how do new energy vehicles solve this heat dissipation problem? In fact, they have a lot of tricks.
The first thing that needs to be explained is. The heat dissipation of the power system is not only to drain it from the motor and other parts, but to make better use of them. After all, energy saving is the theme of today's automobile industry. It is obviously the highest level of engineers to use every bit of energy in the car to the maximum extent.
Before, we have also interpreted the thermal management of other new energy systems: such as batteries: and how air-conditioning is more efficient:
Why does the motor need to dissipate heat?
Overheating will affect operating efficiency, affect lubrication and insulation, and even burn out the motor. If the electric motor of the new energy vehicle does not have good heat dissipation. In continuous operation, it is easy to overheat. After the temperature continues to rise, the internal resistance of the motor will also increase, and the efficiency and output of the motor will drop sharply at this time. For models with a monitoring system, the power output is often limited at this time to play a protective role.
Higher temperatures will also affect the lubrication and insulation inside the motor, and in extreme cases, it may even burn the motor. Although the motor of a new energy vehicle is not as expensive as a battery, it is expensive to replace it with a new one.
For non-main player, air cooling is enough
Advantages: simple structure and low cost Insufficiency: average heat dissipation efficiency, unable to cope with high-power motors; unable to recycle heat
Air cooling is actually the earliest cooling technology applied to fuel vehicles. Early classic models such as the Beetle and Fiat 126P adopted air cooling technology. For electric vehicles, it is relatively easy to adopt this technology. It transfers the heat generated by the motor to the outside of the car through the housing of the motor. Then the heat is taken away by the airflow. Also for heat dissipation considerations. We see that the housing of the motor and drive system on the car is also usually made of aluminum alloy. It is not only lighter in weight, but also conducive to heat dissipation.
Any automobile technology has its applicable types, just like the motor cooling method of new energy vehicles. Each method, whether it is oil-cooled, air-cooled, or water-cooled, has its own advantages and disadvantages, and is suitable for different models. Again, there is no best technology, only the most applicable technology.
