The third stage, from 2005 to the present, is the over speed stage of electric bicycle in China, which is called “blowout stage” by the industry.
In this time period, with the fierce competition between enterprises greatly stimulate the progress of technology and the diffusion of new technologies, the technology level of the whole industry has been greatly improved, and battery life and capacity has increased by 35%. The motor has developed from a single brushless toothless motor to a brushless high-efficiency motor, with a five-fold increase in life, a nearly 300-fold increase in efficiency, and an increase of about 3.5 times in slope climbing and load-carrying capacity.
At the same time, the manufacturing cost has been greatly reduced, the price power has been reduced to 21%, and the technical level of the controller system and charging system has been greatly improved.
Battery also has a single lead-acid battery evolution out of various types of high-performance batteries, and the emergence of lithium batteries, more driven by the development of electric bicycles, especially the development of simple funds. In the motor, the invention of permanent magnet brushless motor, so that the pace of development of the industry significantly accelerated.
The key to the performance of the motor is the performance of the strong magnetic material. In all kinds of permanent magnetic materials, the performance of the rare earth permanent magnet is the most superior.
China is recognized by the world as a powerful country in rare earth resources and the manufacturing power of rare earth products. Because of the good performance, low price and strong manufacturing ability of rare earth strong magnetic material, BLDC (Brushless DC permanent Magnet Motor) system, which is expensive in international market, has been widely used in Chinese enterprises. The electric bicycle industry therefore obtains the resources superiority.