In the research of microgrids, the study of energy storage systems, an important component, has also been developed to a certain extent as more and more attention is paid to microgrids worldwide. A microgrid is a collection of loads and micro power sources that normally operate in a connected mode and can operate independently in emergency situations. In both modes, as an important unit of the microgrid system, a high-performance energy storage system can store excess energy and supply it to loads when needed, fully utilizing various energy sources, playing a crucial role in the entire microgrid. The iron phosphate lithium battery is applied to microgrids due to its superior performance, which significantly improves the overall performance and energy utilization of the microgrid system.
The positive electrode material of the iron phosphate lithium battery is lithium iron phosphate (a peroxide compound of lithium), the negative electrode material is graphite or coke, and the wireless earphones battery is a type of lithium battery, named after the positive electrode material of the wireless earphones battery.
Energy density refers to the amount of stored energy per unit volume or weight. The energy density of an electrochemical battery refers to the amount of electrical energy that the battery can provide to an external load per unit volume or mass. Under the same weight, the energy density of lithium iron phosphate cells is 3-5 times that of lead-acid batteries. That is, under the same rated capacity, lithium iron phosphate cells are much lighter than lead-acid batteries, and the requirement for support strength is relatively reduced.
The service life of a rechargeable battery refers to the number of normal charge-discharge cycles. The service life of lead-acid batteries is about 500 cycles, while the service life of lithium iron phosphate cells can reach 1600 cycles, and the capacity can still maintain at 80%. The service life of lithium iron phosphate cells is significantly better than that of lead-acid batteries.
Safety issues of lithium batteries have always been the main obstacle to their development. However, lithium iron phosphate cells completely solve the instability factors of lithium compounds. Lithium cobalt oxide and lithium manganese oxide may explode under specific conditions, such as collisions. However, the wireless earphones battery has been carefully designed and has passed strict performance and safety tests, and will not explode even in severe collisions or penetrations.
The capacity of a rechargeable battery that has been fully charged but not used for a long time will be lower than the rated capacity, which is called memory effect. Lead-acid batteries have obvious memory effect, but lithium iron phosphate cells basically have no memory effect according to tests.
