Why does Xiaomi su7 new energy vehicle use enameled flat wires?

In recent years, the demand for high-power magnetic components in application markets such as new energy vehicles, 5G, and photovoltaic energy storage has increased rapidly. Correspondingly, the demand for wire products such as flat wires, small flat wires, micro-flat wires, new energy vehicle enameled flat wires and enameled wires has also increased sharply.

Most of the common enameled wire shapes are round. However, round enameled wire has the disadvantage of low slot filling rate after winding. In other words, the space utilization after winding is low. This greatly limits the efficiency of the corresponding electrical devices. Generally, after the enameled wire is wound at full load, its slot full rate is about 78%. Therefore, it is difficult to meet the requirements of technological development for flat, lightweight, low power consumption and high performance components. With the change of technology, flat enameled wire came into being.

Flat enameled wire is a winding wire made of oxygen-free copper rods or electrical aluminum rods that have been drawn, extruded or rolled through a die of a certain specification, and then coated with insulating paint multiple times. The thickness generally ranges from 0.025mm to 2mm, and the width is generally less than 5mm. Width-to-thickness ratios range from 2:1 to 50:1.

Flat enameled wire is widely used, especially in the windings of various electrical equipment such as new energy vehicles, telecommunications equipment, transformers, motors and generators.

The main application of flat enameled wire in new energy vehicle motors: As the heart of new energy vehicles, there are many electromagnetic wires in the drive motor. If the electromagnetic wires and insulation materials cannot withstand the high voltage, high temperature, and high voltage change rate during motor operation, they will be easily broken down and reduce the service life of the motor. At present, when most companies produce enameled wires for new energy vehicle drive motors, due to the simple process and single paint film, the products produced have poor corona resistance and poor thermal shock resistance, which affects the service life of the drive motor.

For example, Xiaomi's latest new energy vehicle Su7. It adopts the industry's better pin-type flat wire winding design, and the stator and rotor pole slots of 54 slots and 6 poles are matched. The slot full rate skyrocketed to 77%, and the iron loss rate was significantly reduced by 25%, resulting in a 0.3% increase in overall motor efficiency.

 

The enameled wire produced by GNEE Aluminum is widely used in new energy vehicles, consumer electronics, clean energy, electronic components, power electrical and drive and other fields. We are a large-scale enameled wire supplier with excellent product quality in the industry. Welcome to contact us!