In-depth discussion of energy storage battery technology, battery energy storage value evaluation research and battery energy storage device applications, etc.
Judging from the actual application of large-capacity energy storage systems, Japan, the United States and other countries are currently the countries with the most applications of energy storage systems in the world. Tokyo Electric Power Company is in an international leading position in the research and development of sodium-sulfur battery systems, and has relatively mature […]
(1) Working principle of vanadium batteryFlow storage systems are often referred to as redox flow energy storage systems (Redox-Flow Cell or Redox-flow Cell for Energy Storage Systems, flow storage power stations or flow batteries), developed by Thaller LH (NASA Lewis Research Center, Cleveland, United States) proposed an electrochemical energy storage principle in 1974. As shown […]
In 1978, Italian A. Pellegri et al. mentioned VRB for the first time in a patent. In 1984, the University of New South Wales (UNSW) in Australia carried out a series of research on VRB, which involved electrode and diaphragm materials, electrolyte preparation methods and so on. UNSW obtained the US patent for VRB in […]
(1) Charging and discharging characteristics of sodium-sulfur batteryThe shell of sodium-sulfur battery is usually made of stainless steel, aluminum or special anti-corrosion chrome-plated low-carbon steel and other materials. The negative electrode active material is molten Na with a melting point of 98°C; the positive electrode active material is molten sulfur (S) with a melting point […]
The sodium-sulfur battery is a secondary battery that uses Na-beta-alumina (Al2O3) as the electrolyte and separator, and uses sodium metal and sodium polysulfide as the negative and positive electrodes, respectively. Sodium-sulfur batteries are usually composed of positive electrode, negative electrode, electrolyte, separator and casing. Generally, conventional secondary batteries such as lead-acid batteries, cadmium-nickel batteries, etc. […]
Sodium-sulfur batteries were first invented in the mid-1960s. Early research mainly focused on the application of electric vehicles. Ford in the United States, YUESA in Japan, BBC and Railway Laboratories in the United Kingdom, ABB in Germany, Mink in the United States and other companies have successively A sodium-sulfur battery electric vehicle has been assembled […]
1. The working principle of Ni-MH batteryThe Ni-MH battery is an alkaline storage battery with metal hydride as the negative electrode, NiOOH as the positive electrode, and KOH aqueous solution as the electrolyte. The electrochemical formula is:(-)M/MH| KOH(6mol/L)|Ni(OH)2/NiOOH(+) hydrogen storage alloy has the function of absorbing and releasing hydrogen when the potential changes. The battery […]
Ni-MH battery is a new type of green battery developed in the 1990s. It entered the stage of practical application in 1988 and started mass production in Japan in 1990. It has the characteristics of high energy, long life, no pollution, etc., so it has become one of the high-tech products developed by countries all […]
(1) Technical performance parametersThe main technical performance parameters of a typical lithium iron phosphate (LiFePO4) battery for EV and PHEV made by a company are shown in Figure 1. (2) Charging and discharging characteristics of lithium-ion batteries1) Discharge characteristics under different discharge rates. The discharge characteristics of a 55Ah lithium iron phosphate (LiFePO4) battery at […]
(1) Principles of charging and discharging lithium-ion batteriesThe charging and discharging principle of lithium-ion batteries is shown in Figure 1. Lithium ion battery is actually a kind of lithium ion concentration difference battery. The positive and negative electrodes are composed of two different lithium ion intercalation compounds. Lithium ions are extracted from the positive electrode […]