What Causes Battery Leakage?

[StTimothy]

Battery leakage can occur due to the following reasons: 1. Cracks in the casing: The seal between the top cover and the bottom tray may deteriorate with age. It is necessary to inspect the battery for any visible cracks. If found, they should be repaired using plastic welding, followed by checking the electrolyte concentration to ensure the battery functions properly. 2. Leaking components: There might be leakage from the safety valve or terminal connections. Remove the battery cover to check for any signs of leakage around the safety valve. If leakage is detected, the affected parts should be repaired or replaced immediately. Car batteries have a limited lifespan. If the electrolyte leakage is severe (leaking out completely in a short time), the battery should be replaced promptly. The leaked electrolyte (containing strong acid) can corrode the surrounding car body or components.

[Kent]

I've encountered battery leakage before, which is essentially cracks or aging deformation in the battery casing. The electrolyte in car batteries is a sulfuric acid solution. Over time, the plastic casing becomes brittle due to aging. Overcharging or excessive battery temperature can cause the casing to bulge and crack. The acidic smell you often notice or the white crystalline deposits around the battery are usually signs of leakage. Untreated leakage is extremely hazardous—it can corrode the vehicle frame and may even cause short circuits or spontaneous combustion. I recommend that car owners don't handle this issue carelessly. Wear rubber gloves, remove the battery, and take it to a repair shop for inspection. Once leakage occurs, the battery usually needs complete replacement, as typical battery lifespan is only about three to four years.

[DiRebecca]

We car owners need to pay attention to battery leakage. Simply put, it's when the acidic liquid inside the battery seeps out. Common causes include the battery casing being cracked by bumps or the battery being deformed due to unstable voltage during charging. When washing your car, open the engine compartment and check regularly. If you see blue-green powder around the electrode connections or the wire insulation becomes hard and cracked, it's likely a sign of leakage. I remember the technician during my last service mentioned that batteries in humid southern areas are more prone to corrosion and leakage. For safety, don't attempt to remove a leaking battery yourself—the electrolyte can cause burns if it comes into contact with skin. Just take it to a professional shop to replace it with a leak-proof battery, which usually costs a few hundred yuan. The battery that comes with a new car typically lasts about five years.

[LaJulian]

The essence of battery leakage is the failure of sealing. The lead plates inside the battery react with the acid to generate electricity, and prolonged vibration can loosen the seams of the casing; high temperatures accelerate the evaporation of the electrolyte, increasing internal pressure and forcing open the vent valve. These factors can cause acid to seep out, resulting in leakage. The most obvious signs are a moist battery casing or oily liquid on the ground, accompanied by a pungent odor. In my tests, leaking batteries experience a sudden voltage drop and must be replaced promptly. It is recommended to open the hood for ventilation when parking in a garage and to clean the electrodes with a damp cloth every six months to prevent corrosion.