FAQ

Flow battery is a secondary battery technology in which active substances exist in a liquid electrolyte. The electrolyte is placed outside the stack and flows through the stack under the impetus of the circulating pump, and an electrochemical reaction occurs to realize the conversion of chemical energy and electrical energy, thereby realizing the storage and release of electrical energy. According to different active materials, flow batteries can be divided into various technical routes such as all-vanadium, zinc/bromine, sodium polysulfide/bromine, and iron/chromium.

Taking the most widely used all-vanadium redox flow energy storage battery as an example, it has the following advantages.

①Long cycle life: The charge-discharge cycle life of the all-vanadium redox flow energy storage battery can reach more than 13,000 times, and the calendar life is more than 15 years.

②Good charging and discharging characteristics: The all-vanadium redox flow battery energy storage system has the characteristics of rapid and deep charging and discharging without affecting the service life of the battery, and the uniformity of each single-cell battery is good. In addition, vanadium ion has high electrochemical reversibility and small electrochemical polarization, so it is very suitable for high current fast charge and discharge.

③ Independent design of power and capacity: The power of the all-vanadium redox flow battery is determined by the specification and quantity of the stack, and the capacity is determined by the concentration and volume of the electrolyte. Therefore, the expansion of power can be realized by increasing the power of the stack and the number of stacks, and the increase in capacity can be realized by increasing the volume of the electrolyte.

④Safety and environmental protection: The all-vanadium redox flow battery energy storage system works under normal temperature and pressure conditions, which not only prolongs the service life of battery components, but also shows very good safety performance. In addition, the electrolyte solution can be recycled and reused, which is environmentally friendly and saves resources. The battery components are mostly cheap carbon materials and engineering plastics, with long service life, rich material sources, mature processing technology and easy recycling.

All-vanadium redox flow battery is suitable for peak shaving power system, large-scale photovoltaic power system, energy storage of wind power generation system, and uninterruptible power supply or emergency power supply system.

And we can find that many characteristics of flow batteries are actually very suitable for the technical needs of electric vehicles. With the development of related technologies, it is natural for some manufacturers to try to apply flow batteries to new energy vehicles.