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Alkaline battery & Button cell manufacturing process-News
What is an alkaline battery?
2022-04-28 17:04:49
Alkaline batteries, also known as alkaline dry batteries, alkaline zinc-manganese batteries, and alkaline-manganese batteries, are the best-performing varieties in the series of zinc-manganese batteries.
Most alkaline dry batteries consist of three main parts: an electrode, an electrolyte, and a separator. Where the electrodes are divided into a cathode and an anode, the cathode is where the battery leaves during discharge, and the other is called the anode. Between these electrodes, there is an electrolyte.
It consists of a substance such as a liquid or gel with charged ions that react with the electrodes to make the battery generate electricity. The last part of the battery, the separator, the separator plays an important role and is an important factor in determining whether the battery will short-circuit and determine the length of the battery's service life. If there is no separator, the two electrodes will be in contact, resulting in a short circuit and cannot work normally. .
Take a flashlight as an example of how batteries work: put alkaline batteries in the flashlight. The chemical energy stored in the battery is converted into electricity, which flows from the battery into the bead of the flashlight, causing it to light up. The current then goes to the other end of the battery again. A good battery is inseparable from a good separator. The selection of materials is very important. Don't underestimate a small and inconspicuous separator paper, which is actually a super important part of the battery.
Most alkaline dry batteries consist of three main parts: an electrode, an electrolyte, and a separator. Where the electrodes are divided into a cathode and an anode, the cathode is where the battery leaves during discharge, and the other is called the anode. Between these electrodes, there is an electrolyte.
It consists of a substance such as a liquid or gel with charged ions that react with the electrodes to make the battery generate electricity. The last part of the battery, the separator, the separator plays an important role and is an important factor in determining whether the battery will short-circuit and determine the length of the battery's service life. If there is no separator, the two electrodes will be in contact, resulting in a short circuit and cannot work normally. .
Take a flashlight as an example of how batteries work: put alkaline batteries in the flashlight. The chemical energy stored in the battery is converted into electricity, which flows from the battery into the bead of the flashlight, causing it to light up. The current then goes to the other end of the battery again. A good battery is inseparable from a good separator. The selection of materials is very important. Don't underestimate a small and inconspicuous separator paper, which is actually a super important part of the battery.
Alkaline batteries are more suitable for high-power electrical appliances than carbon batteries, but with the development of digital technology, many electrical appliances can be called electric tigers, such as high-brightness LED flashlights, flashes, etc. The current of these electrical appliances is often 1500mA, and the general alkaline battery is probably also embarrassing.
The leakage problem of carbon and alkaline batteries has always been a headache for consumers. Needless to say, carbon batteries use the negative electrode zinc that is continuously consumed during the discharge process as the shell, which determines that the shell is likely to rupture and leak in the later stage of discharge. After all, the reaction does not necessarily occur so uniformly.
Although the alkaline battery adopts a sealed battery structure, the alkaline solution has a characteristic called wettability, which has a particularly strong adsorption capacity on the metal surface. This causes the so-called alkali climbing phenomenon. You can also do simulation experiments at home, find a stainless steel chopstick or the like, and insert a thicker soda ash aqueous solution vertically. As a result, the solids of soda ash would climb all the way up the metal chopsticks.
This phenomenon is actually due to the adsorption on the metal surface, the concentration gradient of the soda ash solution above the liquid level is caused by the evaporation of water, and the soda ash solution below is "sucked" to evaporate. This also happens in alkaline batteries from time to time, which is what we often call the phenomenon of battery leakage. The leakage is not terrible, but it mainly corrodes expensive electrical appliances. Electrolyte leak.
In addition, when the alkaline battery is over-discharged, the negative electrode generates hydrogen gas, and the internal pressure of the battery increases. In order to prevent the battery from exploding, the pressure relief valve at the negative electrode will be opened, and the exhaust gas will of course leak. Battery leakage is a very pleasant and painful thing. Lightly corrodes the electrodes and affects the contact, and in severe cases corrodes the circuit board and expensive electrical appliances are scrapped. So, for a long time, an important improvement goal of the battery is to have no leakage.
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