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The Development Of Electric Bike

Issuing time:2021-04-28 10:44

For the development history of electric bicycles in China, the industry generally agrees on three development stages: the initial stage of electric bicycles, the stage of initial production scale, and the stage of overspeed development.

The initial stage of electric bicycles is also known as the early experimental production stage of electric bicycles. From the time point of view, it is from 1995 to 1999. This stage is mainly to explore the key technologies of the four major parts of electric bicycles, motors, batteries, chargers and controllers. In terms of R & D and production, it is mainly based on the spontaneous collection of information, tracking technology, organization of market observations, and small-scale market trial launches by the production enterprises, which also make electric bicycles begin to enter the vision of consumers and are gradually recognized and accepted by them. From a technical point of view, in the early days of electric bicycles, the new battery can only travel about 30 kilometers at a time. The battery life is short, the climbing ability is poor, it is easy to wear, and the motor is also a brushless toothless motor. But the accumulation during this period has laid a foundation for the scale of industrialization in terms of talent, technology and product development.

The second stage is called the scale of initial production, because there are several opportunities to promote electric bicycles during this period, which makes the electric bicycles that are struggling in the initial stage ushered in the spring, and more Yes, the development of the industry has entered a scale, and the most valuable of these opportunities are the "Motorcycle Prohibition" in various cities and the "SARS" in 2003

This period of time is generally recognized as the period from 2000 to 2004. During this period of time, with the breakthrough of key technologies and the continuous improvement of the performance of electric bicycles, electric bicycles have become motorcycles and bicycles. Alternative products, which are fast, environmentally friendly, convenient and cheap, also stimulated the market demand for electric bicycles. In the growing market demand, the enterprises that previously developed and produced have risen rapidly, and some new companies have also begun to enter. Their investment in electric bicycles has also continued to increase, resulting in rapid expansion of production capacity (see Table 1.1 for details). Moreover, the companies that jumped up quickly during this period were all generous operations, and those older generation R & D and production enterprises have been left behind. However, some large-scale enterprises represented by well-known brands have been formed, and according to the differences between the north and the south, three industrial clusters represented by Jiangsu Wuxi, Zhejiang, and Tianjin have also formed.

The third stage is from 2005 to the present. This stage is the super-speed development stage of electric bicycles in China, which is dubbed the "blowout stage" by the industry. In this period of time, as the fierce competition between enterprises greatly stimulated the progress of technology and the spread of new technologies, the technical level of the entire industry has been greatly improved, the battery life and capacity have been increased by 35%, and the motor The development of toothed motors has become the mainstream of brushless high-efficiency motors, with lifespan increased by 5 times, efficiency increased by nearly 30%, and climbing and load capacity increased by approximately 3.5 times. While the performance is improved, the manufacturing cost is also greatly reduced, and the price power is reduced to 21%; the technical level of the controller system and charging system is also greatly improved. In particular, great progress has been made in battery technology and motor technology. The technological breakthroughs in lead-acid batteries for electric vehicles have led the world, and formed the Zhejiang Changxing plate, Kang Lien, Zhejiang, led by Tianneng and Chaowei. Jiangsu plate represented by Shuangdeng and Guangdong plate represented by Ruida. There are also single lead-acid batteries that have evolved into many types of high-performance batteries, and the emergence of lithium batteries has further promoted the development of electric bicycles, especially simple models. In terms of motors, the invention of permanent magnet brushless motors has significantly accelerated the pace of industry development. The key to the performance of the motor is the performance of the strong magnetic material. Among the various permanent magnet materials, the rare earth permanent magnet material has the most superior performance. China is a world-recognized large country of rare earth resources and a strong country of manufacturing rare earth products. The rare earth ferromagnetic material has good performance, low price, and strong manufacturing capacity, which makes the expensive BLDC (brushless DC permanent magnet motor) system in the international market widely used in Chinese enterprises, so the electric bicycle industry has obtained a unique resource advantage. From the point of view of the industry's total output and sales, in 2005, the total output of various light electric vehicles (including electric bicycles) of hundreds of companies in the country is expected to exceed 9 million units, with exports of about 2 to 3 million units, and an industrial output value of 200. The profits and taxes are about 6 billion yuan, and nearly 1 million people are employed in related production and service fields. China's production and sales of light electric vehicles have accounted for more than 90% of the world, and China has become the world's largest producer, consumer and exporter of light electric vehicles.

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