Portable power station energy storage battery type

　　Optional energy storage portable power stations batteries include: sodium-sulfur batteries, flow batteries, lead-acid batteries, lithium iron phosphate batteries and power capacitor batteries. The introduction of various types of batteries is as follows:

　　(1) Sodium-sulfur battery

　　The sodium-sulfur battery works in a high temperature environment of 300 ° C. Its positive active material is liquid sulfur (S); the negative active material is liquid metal sodium (Na), and the middle is a porous ceramic separator. The main features of sodium-sulfur batteries are high energy density (3 times that of lead capacitor batteries), high charging efficiency (up to 80%), and longer cycle life than lead capacitor batteries. They are suitable for large-scale energy storage systems.

　　(2) Flow battery

　　The active material of the flow battery can be dissolved and distributed in two storage tanks. The solution flows through the flow battery, and reduction and oxidation reactions occur on the electrodes on both sides of the ion exchange membrane. This chemical reaction is reversible, so the ability to charge and discharge multiple times can be achieved. The energy storage capacity of this system is determined by the volume of electrolyte in the storage tank. There are many systems such as vanadium-bromine, all-vanadium, and sodium polysulfide/bromine for flow batteries.

　　(3) Lead-acid battery

　　The main feature of the lead-acid capacitor battery is that it uses dilute sulfuric acid as the electrolyte, and uses lead dioxide and velvet lead as the positive and negative electrodes of the battery, respectively. It has the advantages of low cost, mature technology, and large energy storage capacity. , Mainly used in power system backup capacity, frequency control, uninterruptible power system. However, its disadvantages are low storage energy density, few rechargeable and discharge times, and certain pollution in the manufacturing process.

　　(4) Lithium iron phosphate battery

　　Lithium-ion batteries have high working voltage and fast response speed, but are large in size and have average energy storage density. Lithium iron phosphate battery is a kind of lithium ion battery, and its cathode material is lithium iron cobalt phosphate LiFeCoPO4. Compared with traditional lithium cobalt oxide batteries, the energy density of iron batteries is 75% of that of lithium cobalt oxide batteries, but it has advantages in terms of manufacturing cost, safety performance, cycle life, and power output range.

　　(5) Nanotechnology power capacitor battery

　　Power capacitor battery is a new type of green and environmentally friendly energy storage power product that uses nanotechnology and combines physical capacitors and chemical power sources. The power capacitor battery stores energy at the interface between the electrode material and the electrolyte, and has an ultra-high capacitance value, great charge and discharge power, and very good low temperature performance.