Application of 3v button battery

3v button batteryDue to its small size, it has been widely used in various small electronic equipment, with diameters ranging from 4.8mm to 30mm, and thicknesses ranging from 1.b250m to 7.7mm. It is generally used as a backup power switch for various electronic equipment. Power supplies, such as notebook motherboards, electronic watches, electronic dictionaries, electronic scales, controllers, electric toy cars, pacemakers, electronic hearing aids, electronic counters, digital cameras, etc.;

3V button batteries are also divided into two categories: organic chemical batteries and physical batteries. Organic chemical batteries are more widely used. They are composed of anodization (positive electrode), negative electrode (negative electrode) and electrolyte. As shown in the figure below. Its The surface is made of stainless steel plate, and is used as the positive pole, and the negative pole is stainless The annular cover of the steel plate has a sealing ring insulating layer between the positive and negative electrodes. The sealing ring is made of polyester. In addition to serving as an insulating layer, the sealing ring can also prevent electrolyte leakage. There are many types of 3v button batteries, most of which are commonly used The raw materials are named, such as silver oxide batteries, lithium batteries, alkaline manganese batteries, etc.

3v button battery precautions

In alkaline batteries, silver oxide batteries, and zinc gas batteries using zinc electrodes, the zinc in the negative electrode and the components in the electrolyte can cause chemical changes, so they will be corroded and consumed, which will not only reduce the usable capacity of the battery , will and will produce radon gas, causing the internal pressure of the sealed battery to increase and Expansion. In order to suppress this effect, the surface of the zinc is usually coated with a small amount of liquid mercury, but this also leads to heavy metal pollution caused by scrap batteries to the environment. Although mercury-free button batteries are currently on sale, due to technical issues Or due to patent rights, mercury-free 3v button batteries are not yet popular enough.

3V button batteries are not within the mercury-free prohibition range of ordinary dry batteries, and a small amount of mercury is still allowed to exist. You must further insist on purchasing in accordance with the instructions of environmental protection companies.