How to store hearing aid batteries? Wuxi

In principle, zinc-air batteries will lose energy during storage. Although some batteries last longer than others. The inherent electrochemical system of the battery itself gradually consumes the energy of the battery. This process is called self-discharge, which is related to the material properties and thermodynamic instability of the positive electrode in electrolyte. The self-discharge rate of rechargeable battery is higher than that of non-rechargeable battery.

The normal temperature self-discharge of rechargeable batteries is generally (15% ~ 25%)/ month, and the monthly self-discharge rate of solar cells is low, about 10%. This phenomenon is extremely low in non-rechargeable batteries, less than 2% per year at room temperature, but this value will be affected by many factors.

Among all environmental factors, temperature is the biggest one. This is related to the temperature-dependent electrochemical reaction at the electrode/electrolyte interface, which can be regarded as the heart of the battery. When the temperature decreases, the reaction rate of the electrode decreases and the current decreases.

When in use, it takes a lot of energy to gradually return to room temperature. When the temperature increases, the reaction rate of the electrode also increases, the current increases and the energy is consumed. The general temperature of refrigerator is 0 ~ 10℃, so it is a good place to store batteries. The second influencing factor is humidity. Zinc-air battery is characterized by direct connection with the surrounding atmosphere. If the relative humidity is too low, the electrolyte in the battery will slowly dry. When the relative humidity is too high, the system will store water, both of which are contrary to the performance of zinc-air battery. If the battery is stored in the refrigerator, don't forget that the refrigerator also provides a low humidity environment, just like food without a cover in the refrigerator. Food will gradually lose water and dry slowly. So it's best to put the battery in an evaporation-proof package first.