PH value refers to the negative logarithm of hydrogen ion concentration in solution, which is used to describe the pH value of solution. For lithium iron phosphate batteries, the pH value of the solution usually has no direct influence on the battery performance. Lithium iron phosphate battery is a kind of lithium ion battery, and the cathode material is lithium ferrous phosphate. The working principle of the battery is to realize the storage and release of electric energy through the migration and intercalation/deintercalation of lithium ions between the positive and negative electrodes. The pH value mainly affects the chemical reaction involving ions in the solution and the corrosiveness of the electrode. However, in lithium iron phosphate batteries, the electrolyte is usually a mixture of organic solvents and lithium salts, not an aqueous solution. Therefore, the influence of pH value on electrolyte is relatively small.