The application of lithium battery for power backup in railroad vehicles. In recent years, the revival of the railroad transportation industry is developing at an alarming rate. The global railroad industry has a wide market space, green rail transportation will become the world's preferred mode of transportation, the development trend of rail transportation is good, and the lithium battery industry associated with it also has a good development accordingly.
Backup power lithium battery in the railroad rail vehicles
Most of the battery market used to use lead-acid batteries, in recent years, with the national policy and market demand, the backup power lithium battery has been rapid development, and the rail transit field is the same development trend.
As an emerging energy storage component, lithium batteries have attracted the attention of automotive professionals with their unparalleled advantages. The system has been used in vehicle research for many years, successfully applied in the field of magnetic levitation, backup power, low-power traction power, and has been extended to small and medium power traction systems.
Currently, rail vehicles are mainly powered by contact network or third rail electricity. With the development of battery or capacitor technology, it is entirely possible to use battery or capacitor power to drive trains under certain conditions of traction power demand. This approach allows for the introduction or elimination of contact network powered equipment, while beautifying the environment. Many companies are now bringing this technology to market, especially in low-power rail vehicles. Since vehicles can only be recharged for a limited time during operation, backup power lithium batteries must have the fast charging performance at high rates to ensure that the required energy is available in a short time.
High-speed rail in the process of going out, it is necessary to accelerate the comprehensive independent work of the core technology of the railroad, to form a complete standard system, to promote the development of Chinese standard rolling stock, as well as the complete system of high-speed rail operation. The lightweight level of high-speed trains not only directly determines the safety, smoothness, comfort, energy consumption and noise impact on the environment of high-speed rail operation, which is a key influence element of high-speed rail speed. Among them, the high performance, light weight and long life of the auxiliary lithium battery system is also an important part of the design.

The application prospect of lithium battery in railroad rail vehicles
With the development of lithium battery technology, the application of lithium batteries in foreign countries is becoming more and more common. The governments and industries in Europe and other developed countries have clearly listed lithium batteries as the core item in the development plan of new energy vehicles. After years of development, the materials, manufacturing and application technologies of high-capacity lithium batteries have become relatively mature. In a very short period of time, the parameters of battery volume, weight and power will be improved to adapt to the demand for greater power.
It is believed that in the near future, high-power lithium-ion batteries will meet the demand for greater traction power and be used in traction power systems. Second, large-capacity lithium-ion batteries as a backup power system, the use of lithium-ion batteries small size, light weight, long life, environmental protection and other advantages to replace the original lead-acid, cadmium-nickel batteries.
High-speed rail rolling stock and urban rail transportation equipment industry as an important pillar industry in the field of rail transportation equipment in China, will be accompanied by the implementation of the "Belt and Road" strategy, fully drive the whole lithium battery industry chain synergistic development, enhance global influence.
Many people believe that the cost of lithium batteries is too high, in fact, as the railroads such public safety-oriented sector, the safety of its choice of products is put in the first place, the verification cost itself is very high, someone joking an ordinary hook, folk may be a few dollars in the cost of railroad supporting components, at least double. Traditional batteries in the railroad system reliability requirements and design costs, a lot higher than similar products in the private sector, the actual installed cost of power lithium batteries is not higher than traditional batteries, in fact, slightly lower, if you can effectively solve the system management, then this is not a problem of cost.
Lithium titanate battery with lithium titanate as the negative electrode has been introduced in recent years. The battery in the battery energy density slightly decreased, but the battery temperature adaptability, battery life, safety, etc. have been substantially improved. Considering the requirements of the battery's low temperature performance, service life, safety and energy density of the rolling stock, lithium titanate is currently the most suitable battery for use in the rolling stock.
In a word, the reasonable application of lithium-ion batteries in the rolling stock can not only effectively alleviate the problem of energy shortage, reduce the pollution of the environment and realize the lightweight design of the whole vehicle, and should be developed in large quantities for the wide application of lithium-ion batteries in the rail transportation industry.
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