(1) Positive plate (positive active substance)The main component of the positive electrode plate active material is a lead in which is strong oxidation. When discharged, the reaction is reacted with sulfuric acid to form sulfate, and the electron, and the lead in the lead has two types of lattice, one isα—The other of PB02 isβ—PB02. These two dioxide active substances differ greatly, and they do not have the same role in the positive plate.ß—The capacity given by PB02 isα—1.5 ~~~ 3 times of PBO2. Andα—PB02 has a good mechanical strength, its existence, the positive electrode active material should not soften and fall off, onlyα—PB02 andβα—When the proportion of PBO2 reaches 0.8, the lead-acid battery will show good performance.
The positive electrode active material reacts with electrolyte sulfuric acid in the discharge to form a lead and water in electrolyte sulfuric acid. The reaction formula is as follows: PB02 + 3H ++ HSO4 + 2E == PBSO4 + 2H2O charging, the external line is converted toρPre-lead in BO2 and H2SO4ρB4 + accepts electron formationρB + 2 is formed with sulfate ions in solutionρBSO4. When the primary sulfate reaches a certain amount, it becomes a precipitate to adhere to the plate. The electron of the lead ions in the lead in the lead in the charging is converted into neutralized lead. The hydrogen ions in the water are left in the solution. The oxygen ion is formed into a lattice to form a positive electrode active material.
Lead-acid battery 12V7AH
(2) a negative electrode plate (negative electrode active substance)
In the lead-acid battery, in order to sufficiently react with the electrolytic solution, lead is made into a porous sea cotton, which is also known as a sponge lead. When discharge, lead gives an outer line electron formation PB + 2 and solution. When the sulfate is bonded to lead, charging, the partial PBSO4 is first dissolved into PB2 + and SO4.PB + 2 to receive electron reduction in lead into the negative electrode active material lattice.
(3) Electrolytic solution
Sulfuric acid is one of the important raw materials in lead-acid battery electrolyte, and concentrated sulfuric acid in the market is generally divided into industrial concentrated sulfuric acid, low purity, not suitable for lead-acid batteries; the other is a high purity The analysis is purified, which is suitable for the lead-acid battery, the molecular weight of sulfuric acid is 98, and the content of sulfuric acid in concentrated sulfuric acid is a colorless and transparent oil liquid. It has strong water absorption and corrosive. After combining with water, it can release a large amount The heat. Therefore, in the process of formulation of the electrolyte, it must be taken to protect the protection, so as to avoid danger, do not add water into concentrated sulfuric acid, but slowly add concentrated sulfuric acid to water. During the formulation of lead-acid battery electrolyte, the requirements for water, the water containing impurities, directly affects the quality of the battery. The water storage of the lead battery is colorless and transparent. The residue content should be less than 0.01%. General test water standard Electric resistivityωCM) or electrical conductivity is represented, relatively simple method is: use resistivity measurement: use digital multimeter to dial the gear to 20mωAt the point, two tables are 1 cm from two tables, and the resistance resistance of water is measured at 5.——10mωI.e.
(4) partition
The partition is also one of the main components of the lead battery. The quality is very affected by the battery. The main function of the partition is to prevent the battery positive and negative plate short circuit. In the battery, the requirements for the separator is: use a porous partition, allowed The electrolyte free diffusion and ion migration, there is a relatively small resistance, the diameter of the separator is small. The total area of the gap is large, and the active substance to be sheded from the opposite side. Therefore, the diameter of the partition is small, the number of holes want more. Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
