The working principle of dry batteries, the precautions for the use of dry batteries. Dry batteries are a common energy source in our lives. Many small household appliances or portable digital products require dry batteries to provide working energy. Compared with batteries that can be recharged and used repeatedly, they are disposable batteries. Remember not to bake or heat dry batteries on fire, otherwise it will cause danger.

How dry batteries work

The dry battery belongs to the primary battery in the chemical power supply. It is a kind of disposable battery. The carbon rod is used as the positive electrode, and the zinc cylinder is used as the negative electrode, which converts chemical energy into electrical energy and supplies the external circuit. In the chemical reaction, since zinc is more active than manganese, zinc loses electrons and is oxidized, and manganese gains electrons and is reduced. The main working principle of dry batteries is that the redox reaction is realized in a closed loop!

Manganese-zinc batteries

Ordinary dry batteries are mostly manganese-zinc batteries, with a positive carbon rod in the middle, a mixture of graphite and manganese dioxide outside, and a layer of fiber mesh on the outside. The net is coated with a thick electrolyte paste consisting of ammonium chloride solution and starch, with a small amount of preservatives.

The electrode reaction formula of alkaline zinc-manganese dry battery is: Zn+2MnO2+2NH4Cl=ZnCl2++Mn2O3+2NH3+H2O

Dry battery belongs to the primary battery in a chemical power supply, which is a kind of disposable battery. Because the electrolyte of this chemical power device is a non-flowable paste, it is called a dry battery, which is relative to a battery with a flowable electrolyte. Dry batteries are not only suitable for flashlights, semiconductor radios, tape recorders, cameras, electronic clocks, toys, etc., but also for special, scientific research, telecommunications, navigation, special, medical and other fields of the national economy, very easy to use.

Precautions for the use of dry batteries

1. When replacing lr44 battery replacement 357, replace all batteries with new batteries of the same brand and model at the same time to avoid mixing old and new batteries.

2. Do not short circuit the lr44 same as 357 battery. A battery is shorted when its positive (+) and negative (-) terminals are directly connected. For example, if you put a battery in your pocket with metal objects such as keys or coins, the battery may be short-circuited.

3. The battery should be installed correctly according to lr44 battery compatible with 357 and the polarity marks (+ and -) marked on the electrical appliance. A battery that is incorrectly installed in an electrical appliance may be short-circuited or charged, causing the battery to rapidly rise in temperature and cause danger.

4. Do not charge non-rechargeable primary batteries.

5. The depleted lr44 battery compatible with 357 should be taken out of the electrical appliances in time and disposed of properly. If the discharged battery is left in the electrical appliance for a long time, electrolyte leakage may occur and the electrical appliance may be damaged.

6. Remove batteries from electrical appliances that are expected to be unused for a long time. Although most batteries on the market are now equipped with protective jackets or other methods to contain leakage, those that have been partially discharged or have been depleted. Batteries leak more easily than unused batteries.

7. Do not heat the lr44 same as 357 battery, and do not disassemble the battery without permission.

The above is the working principle and precautions of dry batteries. If you pay attention to the instructions on the dry battery box, you will find the precautions for using the battery, including: forcibly charging the non-rechargeable battery, or inverting the positive and negative poles, mixing different types of LR44 and 357 batteries with different grades, putting the battery in In a fire, an explosion or battery fluid leakage may result.

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