Can a Hot Car Battery Explode?
1 Answers
When a car battery is charging, the electrolyte inside will be in a boiling state, so when you touch it with your bare hand, you will naturally feel that the battery is hot, and theoretically, there is no risk of explosion. However, if the battery becomes abnormally hot (extremely hot to the touch), it may lead to thermal runaway, causing the battery to swell. This abnormal phenomenon occurs because the car battery has become severely sulfated and requires timely repair. Here are methods to repair battery sulfation: 1. Water Therapy: The concentration of the battery electrolyte is a crucial factor. Abnormal concentration can lead to sulfation. To address this, first discharge the battery, then pour out the original electrolyte and replace it with a solution at a concentration of 1.1g/cm³ to enhance the solubility of lead sulfate. Next, charge the battery at a current rate below 20h, ensuring the liquid temperature remains between 20~40°C. After completing the charging process, the sulfation issue will be resolved, and the battery capacity can be restored to over 80%. 2. Shallow Cycle High-Current Charging Method: After prolonged use, sulfide salts naturally accumulate on the battery plates and need to be removed promptly. First, fully charge the battery using a high current within a 5h rate. Then, discharge 30% of the battery's capacity while keeping the liquid temperature below 40°C. This process helps flush out the lightly sulfated salts on the plate surfaces, causing them to desorb, dissolve, and convert into active material. Repeating this cycle three to four times can effectively repair the sulfation issue in the car battery.
