22 Years' Battery Customization

What is the meaning of motorcycle maintenance-free dry battery?

APR 15, 2019   Pageview:1122

The general battery is filled with electrolyte. After using it for a period of time, it needs to be replenished. The maintenance-free battery is that you don't have to worry about replenishing the electrolyte until the battery breaks down. If the battery is not used, it must be taken down and stored for charging every month.

 

A dry battery generally refers to a carbon battery, which is different from an alkaline battery, a nickel-hydrogen rechargeable battery, and the like.

 

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 (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 a primary battery and a secondary battery. For general use, as well as a lightweight battery they can be used on many electrical appliances.

 

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

 

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 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 in the 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 graphite to the positive carbon rod. The electrolytic reaction of zinc is 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 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, China's dry battery industry has expanded its production and sales scale, and its profits and sales profits have risen sharply. The industry's operating efficiency is good. In 2011, the total assets of China's dry battery industry was 88.091 billion Yuan, a year-on-year increase of 39.35%; the sales revenue was 96.515 billion Yuan, a year-on-year increase of 32.40%; the total profit was 5.720 billion Yuan, a year-on-year increase of 10.81%. 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, and 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 hitting 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 instrument 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 "bioelectricity."

 

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 put a lot of fluffed cloth or paper sheets 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 "Bunsen Battery" and "Grove Battery". However, at that time, no matter which kind of battery was required to fill the liquid between the two metal plates, the handling was very inconvenient. Especially the liquid used in the battery was sulfuric acid, which was dangerous when it was moved.

 

The originator of dry batteries was born in the mid-19th century. In 1860, France's Lechanche invented a carbon-zinc battery, which is easier to manufacture, and the initially moist-water-based electrolyte is gradually replaced by a viscous paste-like method, so when it is 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 batteries have developed into a large family, and there have been about 100 kinds so far. Common zinc - manganese dry battery, alkaline zinc - manganese dry battery, magnesium - manganese dry battery, zinc - air battery, zinc - mercury oxide battery, zinc - silver oxide battery, lithium - manganese battery.

 

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

 

The electromotive force of the zinc-manganese dry battery is 1.5V. As the NH3 gas generated is absorbed by graphite, the electromotive force decreases rapidly. If the highly conductive paste KOH is used instead of NH4Cl, the positive electrode material is changed to a steel cylinder, and the Mn layer is close to the steel cylinder, which constitutes an 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 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.

 

The page contains the contents of the machine translation.

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