Winter battery is also afraid of freezing
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July 22 01:02:02, 2025
Winter batteries are also vulnerable to freezing, as low temperatures can significantly reduce battery capacity. Cold weather increases the current needed for starting, and it can cause the electrolyte to freeze, leading to a ruptured casing or deformed plates, as well as loss of active materials. So, how can storage batteries be protected from freezing during the cold season?
First, increasing the specific gravity of the electrolyte helps prevent freezing. The electrolyte is made up of water and sulfuric acid. The higher the sulfuric acid concentration, the higher the specific gravity, and the lower the freezing point. Therefore, you should choose an appropriate electrolyte strength based on the lowest winter temperature in your area.
Second, keeping the battery fully charged is crucial. When a battery is only 50% discharged in winter, the electrolyte becomes at risk of freezing. It’s important not to discharge the battery beyond 50% during the cold season. Regular checks on the battery’s condition are recommended to ensure it remains in good shape.
Third, maintaining the electrolyte temperature is essential. As the ambient temperature drops by 1°C, the battery’s capacity may decrease by 1–2%. To counter this, park the vehicle or move the battery indoors where the temperature is above 0°C, especially when not in use.
Fourth, if you add distilled water to the battery during winter, make sure to mix it with the electrolyte quickly. If left too long, the water may float on top and freeze. To avoid this, charge the battery immediately after adding water, or add water while charging so that the mixture is uniform and less likely to freeze.
Fifth, inspect and maintain the electric starting system regularly. Adjusting the voltage regulator to increase the charging voltage by 0.6V can help. Also, limit each start to no more than 3–5 seconds to prevent damage to the starter motor and the battery itself.
Lastly, if the battery isn’t being used in winter, remove it from the vehicle and store it in a place where the temperature is above 0°C. Before storage, clean the battery, fill it with enough electrolyte, and fully charge it. Every two months, give it a top-up charge and check the electrolyte level every two weeks. If it's low, add distilled water immediately. With proper care, your battery can safely survive the winter.
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