Can a Car Battery Be Repaired and Reused?

[MacOwen]

Car batteries can be repaired when they fail. Methods for repairing car batteries are as follows: 1. Shallow Cycle High-Current Charging Method for Repair: First, use a high current (5-hour rate) to fully charge the battery. Then, discharge 30% of the battery's capacity while ensuring the electrolyte temperature does not exceed 40 degrees Celsius. This process helps flush out minor sulfation on the electrode plates, allowing the sulfates to detach, dissolve, and convert back into active materials. Repeating this cycle three to four times can effectively repair the sulfation issue in car batteries. 2. Restoring Electrolyte Concentration in the Battery: Electrolyte concentration is a critical factor affecting battery performance. Abnormal concentration levels can accelerate battery degradation, necessitating repair. First, discharge the battery completely, then drain the existing electrolyte and replace it with a new solution at a concentration of 1.1g/cm³ to enhance lead sulfate solubility. Subsequently, charge the battery using a current below the 20-hour rate while maintaining the electrolyte temperature between 20~40 degrees Celsius. After completing the charging process, the sulfation issue will be resolved, and the battery capacity can typically recover to over 80%.