What are the similarities and differences in leakage between alkaline batteries and carbon batteries?

Date:2021-11-15
Summary:

Although my country is a big country in battery product […]

Although my country is a big country in battery production, the problem of battery leakage still exists, especially for dry batteries. Our commonly used dry batteries are mainly alkaline batteries and carbon batteries. Is the leakage of carbon dry batteries and alkaline dry batteries the same?

Generally speaking, the leakage of dry battery is related to the sealing process. For imported batteries, over-discharge during use will cause dry battery leakage, usually due to excessive output current and too long continuous discharge time, which leads to an increase in battery temperature. Since the end voltage of the dry battery is 1V, theoretically speaking, as long as it continues to work below this voltage, it may cause leakage of the dry battery. In the design of the voltage value for the possible leakage, some manufacturers promise 0.6V, the best promise 0.3V, but the latter is difficult to achieve.

Improper use or defective battery design will short-circuit the positive and negative electrodes of the battery, causing instantaneous large currents inside the battery, which directly causes the battery body to become hot, and the subsequent temperature rise and pressure surge make gas possible Breach the valve, causing the dry battery to leak. The above are the common points of the two types of dry battery leakage, and there are some differences between the two.

First of all, the principle of leakage is different. The zinc skin of the carbon battery shell acts as the negative electrode to participate in the reaction, and it will become thinner when the battery is almost used up. Especially if the battery is still used below 1V, there will be a risk of dry battery leakage. Dry battery leakage is not caused by a chemical reaction. In addition to the aging of the sealant, it is also possible that the battery is improperly charged, causing its internal air pressure to rise, resulting in battery leakage. Secondly, the leaking liquid is different. The liquid of the carbon battery is zinc chloride and amine chloride, while the liquid of the alkaline battery is potassium hydroxide.

The leakage of dry battery will be severely corrosive, which not only pollutes the environment, but also damages the battery itself. Therefore, in order to ensure battery quality and solve the problem of battery leakage, it has become an urgent task for battery manufacturers.
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