How to dissipate the heat of pure electric car motor
For friends who often drive, encounter car problems can be said to be inevitable, such as this, pure electric car how to heat for the motor? I believe that these small car problems are often encountered, so today I will give you a little bit of it, I hope it will help you.
How to dissipate heat for the electric motor of pure electric car
Some pure electric car motors are air-cooled, some are water-cooled. The water-cooled electric motor has a water jacket, so that the coolant can continuously circulate in the water jacket to dissipate heat to the electric motor.
In fact, the cooling system of pure electric car works similar to the general internal combustion engine car. The cooling system of a general internal combustion engine car has a waterway in the engine, and the coolant can continuously circulate in the waterway to dissipate the heat, which can take away the excess heat.
The cooling system of electric motors is similar, and pure electric cars also have water tanks. After the coolant circulates once in the electric motor, it will reach the water tank, which will lower the temperature of the coolant, and then the coolant will return to the water jacket of the electric motor again. Some small pure electric vehicles have a low power motor, and the heat generation of this motor is also relatively low, so this kind of motor does not need coolant to dissipate the heat.
The air-cooled motor housing will be made of materials with better thermal conductivity, and there are also many heat sinks on the housing, and these heat sinks can increase the contact area with the air. This way the airflow through the motor housing can carry away the excess heat when the car is running.
Heat dissipation is very important for the car, and the car is equipped with cooling system. The most important role of the cooling system is not actually to dissipate heat, but to keep the engine or motor within a normal operating temperature range.
The most important role of the cooling system is not to dissipate heat, but to keep the engine or motor within a normal operating temperature range. Generally speaking, the three electric systems, including the electric motor, the battery pack and the electric control system, will generate heat and need to dissipate heat, while the latter does not. The electric motor will generate heat in the process of operation, but relatively speaking, not much. The key heat source will be in the battery pack, whether it is in the charging state or not, the battery pack will generate a certain amount of heat in the process of work, which is an undoubted fact.
At present, electric vehicle radiators are generally made of aluminum alloy, the water pipe and heat sink made of aluminum, aluminum water pipe made of flat shape, heat sink with corrugated, focus on heat dissipation performance, installation direction perpendicular to the direction of air flow, try to do wind resistance to be small, cooling efficiency to be high. The coolant flows inside the radiator core, and the air passes outside the radiator core. The hot coolant becomes cooler because it dissipates heat to the air, and the cold air heats up because it absorbs the heat dissipated by the coolant, reaching heat dissipation through the overall cycle.
As the electric car radiator is an important part of the car water-cooled engine cooling system, and with the development of China’s automotive market more and more extensive, the electric car radiator also began to develop in the direction of light, cost-effective and convenient, at present, China’s electric car radiator is mainly divided into two types of DC type and cross-flow type. The structure of the heat sink core has two types: tube sheet type and tube belt type. The tube sheet radiator core includes a number of thin cooling tubes and heat sink structure, cooling tubes using a flat circular cross-section, used to reduce air resistance and increase the area of heat transfer.
Electric car cooling, electric car is how to heat dissipation? Considering the electronic fan dustproof and waterproof needs, the protection level must be high, which needs to be decided according to the overall installation position of the cooling system. However, there is now a DC brushless fan that can achieve forward and reverse rotation, which can be switched by simply adjusting the built-in control program.