Many people have bought ITEHIL solar generator but don't know how it works. Today we will talk about How ITEHIL Solar Generator to Work.
First of all, ITEHIL solar generator is a LiFePO4 power station made of LiFePO4 battery pack, so how it works is how LiFePO4 battery works.
LiFePO4 battery working principle
When LiFePO4 battery is charged, the lithium ion Li+ in the positive electrode migrates to the negative electrode through the polymer separator; during the discharge process, the lithium ion Li+ in the negative electrode migrates to the positive electrode through the separator. Lithium-ion batteries are named after lithium ions move back and forth during charging and discharging.
1. When the battery is charged, Li+ migrates from the 010 face of the LiFePO4 crystal to the crystal surface. Under the use of electric field force, it enters the electrolyte, passes through the diaphragm, and then migrates to the surface of the graphite crystal through the electrolyte, and then is embedded in the graphite crystal lattice. . At the same time, electrons flow to the aluminum foil collector of the positive electrode through the conductor, flow to the copper foil collector of the negative electrode through the tab, battery pole, external circuit, negative pole, and negative lug, and then flow to the graphite negative electrode through the conductor. The charge on the negative electrode is balanced. After lithium ions are deintercalated from LiFePO4. lithium iron phosphate is converted to iron phosphate, and the lattice structure changes as shown in Figure-2.
2. When the battery is discharged, Li+ is released from the graphite crystal, enters the electrolyte, passes through the diaphragm, and then migrates to the surface of LiFePO4 through the electrolyte, and then re-embeds into the crystal lattice of LiFePO4 through the 010 surface. At the same time, the battery flows to the copper foil collector of the negative electrode through the conductor, flows to the aluminum foil collector of the battery positive electrode through the tab, battery negative pole, external circuit, positive pole, and positive tab, and then flows to the LiFePO4 positive pole through the conductor. , So that the charge of the positive electrode reaches a balance.
It can be known from the working principle of LiFePO4 battery that the charging and discharging process of LiFePO4 battery requires the participation of lithium ions and electrons, and the migration speed of lithium ions must be balanced with the migration speed of electrons. This requires that the positive and negative electrodes of lithium-ion batteries must be a mixed conductor of ions and electrons, and their ionic conductivity and electronic conductivity must be consistent. However, it is well known that LiFePO4 has poor electrical conductivity. Although the conductivity of the graphite negative electrode is better, it is still necessary to improve the conductivity of the negative electrode to achieve a high-rate discharge, so that its electronic conductivity and the ability of lithium ions to be deintercalated from the graphite are balanced.
In order to solve the conductivity problem of the positive and negative electrodes of the LiFePO4 battery, 1. Conductive agents must be added to the positive and negative electrodes of the battery to make it effective in the active material of the battery as shown in the model of Figure-3 and the electron microscope photos in Figure-4. The conductive network. 2. If the ion conductivity of the battery is set to I and the electronic conductivity is set to E, then theoretically I=E; 3. In order to ensure that the battery is charged and discharged in the process of charging and discharging, the charge maintains a dynamic balance: I positive electrode = I electrolyte =I diaphragm=I electrolyte=I negative electrode, E positive electrode=E positive electrode current collector=E pole ear=E positive electrode column=E external circuit=E negative electrode column=E negative electrode ear=E negative electrode current collector=E negative electrode. (These three equations are actually important principles for the design of lithium-ion power lithium batteries. However, in the actual design process and actual production process, how to achieve the above three equations, but also design a series of experiments to verify , Establish mathematical models or establish relevant empirical formulas, and then use these models or formulas to design lithium-ion batteries)
The above is the whole content of How ITEHIL Solar Generator to Work, and the working time chart of ITEHIL Solar Generator is attached. Thank you for watching. This is the end of this article.
