Will the battery freeze in an environment where the temperature is too low?

Tags: Autumn is here, can winter be far behind? The advent of winter is a headache for many users of liquid storage batteries. The weather in the northern winter is generally below zero, and liquids are prone to icing events. If the battery used under the precision instrument freezes and cannot work, it will have a serious impact. At what temperature does the battery freeze? First of all, I must first understand that there are two types of batteries, one is liquid batteries and the other is maintenance-free batteries. The voltage of the liquid battery is relatively stable, but the service life is short and the maintenance is large, so many maintenance-free batteries are used. The normal battery sulfuric acid concentration is 35%-40%, and the freezing point of the electrolyte is between -60 degrees Celsius and -50 degrees Celsius. From the data point of view, as long as the battery liquid density is maintained between 1.25-1.30, the possibility of icing is unlikely. However, as the concentration of sulfuric acid decreases, the freezing point of the battery fluid rises, which makes the battery fluid possible to freeze. This is for liquid batteries. The main reason is that excessive addition of distilled water leads to a decrease in the density of the battery liquid. At this time, the increase in the percentage of water in the battery liquid leads to an increase in the freezing point of the battery liquid. As long as the maintenance-free battery is used in an ambient temperature between -40 degrees Celsius and 50 degrees Celsius, there is no need to worry about the battery freezing, unless excessive discharge causes the electrolyte density to decrease, and the imbalance of sulfuric acid and water makes the freezing point of the battery liquid rise. In short, a lead-acid battery in good condition will not freeze under normal conditions, so battery users must check the battery condition regularly to avoid over-discharge or over-filling of the battery.
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