![]() It supports the instantaneous energy transfer by large currents that cannot be achieved with lithium-ion batteries with its high impedance.By instantly storing energy that is generated frequently and irregularly, the stored energy can be used at the required timing. We will build an energy regeneration system that stores energy during railway deceleration and uses the stored energy during acceleration. ![]() Technical Advantages of Lithium-ion Capacitors (LIC) Also, in terms of miniaturization and weight reduction, it has the characteristic of being easy to miniaturize due to its high energy density. In this respect, lithium-ion capacitors have lower impedance than lithium-ion batteries, making them suitable for short-cycle charging and discharging. Therefore, railway energy regenerative equipment requires a power storage medium that can efficiently charge and discharge by utilizing and suppressing voltage fluctuations in a short cycle. Railways have the characteristic that vehicles are constantly moving and are repeatedly accelerating and decelerating. Since the equipment is installed in Japanese railway stations or substations, it is important to reduce its size and weight, and because the overhead line voltage is high, safety is also a major issue. In addition, the merit of introducing a regenerative device is not only the effective use of energy, but also the purpose of suppressing the voltage rise of the overhead wire due to the energy during braking.Ĭurrently installed storage media include lithium-ion batteries, electric double-layer capacitors (EDLC), and our lithium-ion capacitors (LIC). And it is the energy storage technology that makes this possible, and it is a device equipped with a energy storage medium. In the railway industry, the introduction of regenerative systems that effectively utilize the energy that would otherwise be wasted is progressing. Regenerative energy is the energy generated by converting the kinetic energy of a railroad vehicle during deceleration into electrical energy, and is normally discarded energy. ![]() Therefore, the "energy regeneration device" is attracting attention and being introduced for the effective use of energy. It is said that it is not realistic on the railway. However, there are limits to the efficiency of converters and the weight reduction of rolling stock, and it is essential to develop batteries suitable for the Japanese railway industry, which mainly uses large rolling stock, for EV conversion. In recent years, energy saving has been called for due to environmental problems, and the railway industry is also developing with a view to improving the efficiency of converters, reducing the weight of vehicles, and making them electric (EV) in the future.
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