Analysis of the working principle of vanadium battery

Vanadium battery (VRB) is a mobile battery that is gradually entering the commercialization stage. VRB is a chemical energy storage technology. Compared with traditional lead-acid batteries and nickel-cadmium batteries, VRB has many magical features in design, and its performance is also suitable for a variety of industrial occasions, such as replacement of diesel engines and backup. Power supply, etc. The VESS system (Vanadium Energy Storage System), designed and manufactured using VRB technology, has its design and operating characteristics optimized on the basis of VRB, and integrates many automated intelligent controls and electronic devices for management operations. Simply put, a vanadium battery converts the energy stored in the electrolyte into electrical energy by exchanging electrons between two different types of vanadium ions separated by a diaphragm. The electrolyte is a mixture of sulfuric acid and vanadium, and the acidity is the same as that of a traditional lead-acid battery. Because this electrochemical reaction is reversible, VRB batteries can be charged or discharged. As the concentration of the two vanadium ions changes during charging and discharging, electrical energy and chemical energy can be converted into each other. The VRB battery consists of two electrolyte cells and a layer of battery cells. The electrolyte cell is used to hold two different electrolytes. Each battery cell consists of two half-cells, sandwiched between a separator and an electrode for collecting current. Two different half-cells contain electrolytes of vanadium in different ion forms. Each electrolyte cell is equipped with a pump for transporting electrolyte for each half cell in a closed pipeline. When the charged electrolyte flows in the layers of battery cells, electrons flow to the external circuit, which is the discharge process. When electrons are transported from the outside to the inside of the battery, the opposite process occurs, which is to charge the electrolyte in the battery cell, and then return it to the electrolyte cell by the pump. In VRB, the electrolyte flows between multiple battery cells, and the voltage is formed by connecting the voltages of each cell in series. The nominal voltage is 1.2V. The current density is determined by the surface area of u200bu200bthe current collector in the battery cell, but the supply of current depends on the flow of electrolyte between the battery cells, rather than the battery layer itself. One of the most important features of VRB battery technology is that the peak power depends on the total surface area of u200bu200bthe battery layer, while the battery capacity depends on the amount of electrolyte. In traditional lead-acid and nickel-plated batteries, the electrodes and electrolyte are placed together, and the power and energy strongly depend on the area of u200bu200bthe plate and the capacity of the electrolyte. But this is not the case with VRB batteries. Its electrodes and electrolyte do not have to be put together, which means that energy storage can be free from the limitation of the battery casing. In terms of electricity, different levels of energy can be obtained by supplying sufficient electrolyte in different battery cells or cell groups in the battery layer. It is not necessary to charge and discharge the battery layer at the same voltage. For example, VRB batteries can be discharged with the voltage of the battery layer in series, while charging can be performed with a different voltage in another part of the battery layer. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What is the maximum temperature that the lithium battery can withstand?