What are the“Uncommon” problems with alkaline batteries?

Alkaline battery in the use of the process, will be exposed to some“Uncommon” problems, voltage rise, voltage negative, poor contact, contact corrosion, etc. . Here's a look at the causes of these problems.

Poor contact. Alkaline zn-mno _ 2 battery has poor contact, which usually occurs in positive electrode. Due to the influence of steel shell stretching process and the need of increasing effective volume, the height of positive pole protruding of alkaline zn-mno _ 2 battery is generally less than 1.5 mm. To prevent the battery from being reversed, battery manufacturers usually design the positive terminal metal sheet of the battery case to lie in the groove.

2. Corrosion at the contact end. After confirming that the battery was not leaking, the terminal of the battery box showed signs of rust, even on the opposite end of the battery, but the rest of the battery and the battery were safe. In fact, this is caused by contact potential difference. We found that the worse the metal material of the battery box terminals, the longer the battery life and the worse the environmental conditions, the more serious the corrosion of the battery box terminals.

3. The voltage goes up. When multiple batteries are used in series, if the polarity of one battery is reversed, it will leave a mark that the voltage of the battery is higher than that of other batteries, because the reversed battery is being charged by other batteries. The more batteries used in series, the higher the reverse battery voltage.

4. The battery voltage is negative. This phenomenon often occurs in the use of general consumers because there is no detection conditions, or no attention, so it is difficult to find. The negative voltage of alkaline zn-mno _ 2 battery is caused by its rechargeable ability.