What is a dry battery? Is it a normal AA battery?

Dry battery: A voltaic battery that uses an absorbent (such as wood chips or gelatin) to make the contents a paste that does not spill. Often used as a power source for flashlight lighting, radios, etc.

The 5th battery is a dry battery.

After years of development, China's dry battery technology has made breakthroughs in energy, cycle life, high and low temperature adaptability. Zhiyan Data Research Center shows that China is gradually narrowing the gap with international leading technology, and has reached international level in some core technologies, and is increasingly entering the international market.

As long as it is not water, it is called a dry battery, but in general, when using a electric knife, it is better to use an alkaline battery. Generally Nanfu, these brands have alkaline batteries.

The general PHILIPS dry electric knife uses the Nanfu energy shaped ring No. 5 battery, which can work continuously for more than 60 minutes!

In life, the TV remote control board, the electric knife and the flashlight are all used dry batteries.

A dry battery is a voltaic battery that uses an absorbent (such as wood chips or gelatin) to make the contents a paste that does not spill. Often used as a power source for flashlight lighting, radios, etc. After years of development, China's dry battery technology has made breakthroughs in energy, cycle life, high and low temperature adaptability.

Zhiyan Data Research Center shows that China is gradually narrowing the gap with international leading technology, and has reached international level in some core technologies, and is increasingly entering the international market.

Drycell is a chemical battery that uses a paste electrolyte to generate direct current (a wet battery is a chemical battery using a liquid electrolyte). It is roughly divided into two kinds, a battery and secondary battery is for common use of daily life, as well as the portable battery.

A battery that can be made in the lab

They can be used on many electrical appliances.

A common dry battery is a zinc-manganese battery (or a carbon-zinc battery, ie dryLeclanchécell).

A dry battery is a primary battery in a chemical power source and is a disposable battery. Since this chemical power supply device has an electrolyte that is a non-flowable paste, it is called a dry battery, which is said to be relative to a battery having a flowable electrolyte. Dry batteries are not only suitable for flashlights, semiconductor radios, tape recorders, cameras, electronic clocks, toys, etc., but also for various fields of national economy such asspecial, scientific research, telecommunications, navigation,special, medicine, etc., very easy to use. Ordinary dry batteries are mostly manganese-zinc batteries, with a positive carbon rod in the middle, a mixture of graphite and manganese dioxide, and a layer of fiber mesh. The network is coated with a thick electrolyte paste, which is composed of ammonium chloride solution and starch. There is also a small amount of preservative. The outermost layer is a cylinder made of metal zinc, which is the negative electrode. The discharge of the battery is the electrolytic reaction of ammonium chloride and zinc. The released charge is transferred from the graphite to the positive carbon rod. The electrolytic reaction of zinc will release hydrogen, this gas will increase the internal resistance of the battery, and manganese dioxide mixed with graphite is used to absorb hydrogen. But if the battery works continuously or for too long, manganese dioxide is too late or has near saturation does not have the ability to reabsorb. At this time, the battery will be too small due to the internal resistance and the output current is too small to lose its effect. However, if the battery is heated or left for a period of time, the accumulated hydrogen inside it will be released by heat or slowly released. Manganese dioxide is also restored to restore, then the battery is energetic!

The chemical equation is: Zn+2MnO2+2NH4Cl=ZnCl2+Mn2O3+2NH3+H2O

Never dissect dry batteries! Do not place it on fire for burning or roasting.

During the “Eleventh Five-Year Plan” period, the scale of China's dry battery market expanded rapidly, and the output increased at an average rate of about 20% per year. The overall scale has doubled, from about 70 million KVAH in 2005 to 14416.68 million KVAH in 2010. . In 2011, the scale of production and sales of China's dry battery industry has expanded, profits and sales profits have risen sharply, and industry operating efficiency is better. In 2011, the total assets of China's dry battery industry were 88.091 billion Yuan, up 39.35% year-on-year; the sales revenue was 96.515 billion Yuan, up 32.40% year-on-year; the total profit was 5.72 billion Yuan, up 10.81% year-on-year. At the same time, after years of development, dry battery technology has made breakthroughs in energy, cycle life, high and low temperature adaptability. At present, China is gradually narrowing the gap with international leading technology. It has reached international level in some core technologies and is increasingly entering the international market.

One day in 1780, the Italian anatomist Luigi Galvani, while doing frog anatomy, held different metal instruments in both hands, accidentally touching the frog's thighs at the same time, and the muscles of the frog's legs immediately twitched. It seems to be stimulated by electric current, and if only a metal device is used to touch the frog, there is no such reaction. Galvani believes that this phenomenon occurs because of a kind of electricity generated inside the animal's body, which he calls "bio-electricity."

In 1799, Volt dipped a zinc plate and a silver plate in salt water and found that there was current flowing through the wires connecting the two metals. Therefore, he flattened a lot of flax or paper soaked in salt water between the zinc sheets and the silver sheets. When you touch both ends by hand, you will feel strong current stimulation. In this way, Volt succeeded in making the world's first battery "volt". This "volt stack" is actually a battery pack in series.

In 1836, Daniel of the United Kingdom improved the "Volt Stack" and successively had better "Bensen Battery" and "Grove Battery". However, at that time, no matter what kind of battery will be filling liquid between two metal plates, transport is not very convenient, especially the battery liquid sulfuric acid is used, is very dangerous when moving.

The originator of dry batteries was born in the mid-19th century. In 1860, France's George Leclanche invented a carbon-zinc battery, which was easier to manufacture, and the initially moist-water-based electrolyte was gradually replaced by a viscous, paste-like method, so when it was placed in a container. A "dry" battery appeared.

In 1887, the British Wilhelm Hellesen invented the earliest dry batteries. Compared with the liquid battery, the electrolyte of the dry battery is paste-like, does not leak, and is easy to carry, and thus has been widely used.

With the development of science and technology, dry cell has developed into a big family, so far, already has more than 100.Common with ordinary zinc-manganese dioxide dry cell, alkaline zinc-manganese dioxide dry cell, magnesium, manganese dry batteries, zinc air battery, zinc oxide mercury batteries, zinc, silver oxide batteries, lithium manganese battery, etc.

For the most used zinc-manganese dry batteries, they can be divided according to different structures: paste zinc-manganese dry batteries, cardboard zinc-manganese dry batteries, thin film zinc-manganese dry batteries, zinc zinc-zinc-manganese dry batteries, alkaline Zinc-manganese dry battery, four-pole parallel zinc-manganese dry battery, laminated zinc-manganese dry battery, and the like.

Zinc-manganese dry batteries are commonly used in daily life.

Cathode material: manganese (MN), graphite rod

Anode material: zinc (Zn) sheet

Electrolyte: NH4Cl, ZnCl2 and starch paste

The battery symbol can be expressed as

(-)Zn|ZnCl2, NH4Cl (mastic) ‖MN|C(graphite)(+)

Negative electrode: Zn-2e-=Zn2+

Positive electrode: 2MnO2+2NH4++2e-=Mn2O3+2NH3+H2O

Total reaction: Zn+2MnO2+2NH4+=Zn2+Mn2O3+2NH3+H2O

Zinc manganese dry battery electromotive force is 1.5 V. Because of NH3 gas produced by adsorption, graphite electromotive force decline rapidly. If use high conductive paste KOH instead of NH4Cl, cathode material to steel cylinder, Mn layer close to the steel cylinder, forming the alkaline zinc manganese dry battery. Since the battery reaction has no gas generation, the internal resistance is low, and the electromotive force is 1.5V, and relatively stable.

The dry battery belongs to the primary battery in the chemical power source, and is a disposable battery. The carbon rod is regarded as a positive electrode, and the zinc tube is used as a negative electrode to convert chemical energy into electric energy to supply an external circuit. In the chemical reaction, since zinc is more active than manganese, zinc loses electrons to be oxidized, and manganese gets electrons to be reduced.

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