Three factors affecting the life of alkaline battery.

2021-04-28 15:18:22

How to improve the lifespan of alkaline battery has always been the focus of research in the battery industry. Among them, the composition, type, porosity, plate size, grid material and structure of the active material are internal factors that affect the life of alkaline battery, while the depth of discharge, overcharge level and temperature are external factors.

1. The influence of temperature. The lifespan of alkaline battery increases with increasing temperature, because the capacity increases with increasing temperature. If the discharge capacity does not change, then when the temperature rises, the depth of discharge is reduced to extend the lifespan. Between 10-35 Celsius, the temperature rises by one Celsius, an increase of 6 cycles. Between 35-45 Celsius, each Celsius of temperature rise can extend the lifespan by more than 25 cycles. When the temperature is higher than 50 Celsius, the lifespan is shortened due to the loss of cathode vulcanization capacity.

alkaline battery

2. Depth of discharge. The depth of discharge means that the discharge starts to stop when it reaches a certain level during use, and 100% depth refers to the discharge of all capacity. The lifespan of alkaline battery is greatly affected by the depth of discharge. Because the anode active material lead dioxide itself is not firmly bonded to each other, lead sulfate is generated during discharge, and returns to lead dioxide during charging. The molar volume of lead sulfate is larger than that of lead oxide, so the volume of the active material expands during discharge. Therefore, the deeper the depth of discharge, the shorter the cycle life.

3. The degree of overcharge. A large amount of gas is released during overcharging. At this time, the active material of the positive plate is impacted by the gas, and this impact will promote the active material to fall off. In addition, the positive grid alloy is also subject to severe anodic oxidation and corrosion, so the service life of alkaline battery will be shortened when overcharged.

Only by strictly and comprehensively controlling the internal and external factors that affect alkaline battery can alkaline battery with longer lifespan be produced.