2025 button cell battery

　　Button battery small science

　　Button batteries, often called button batteries, refer to small single cylindrical batteries whose diameter is greater than their height. Button batteries are divided into disposable (non-rechargeable) type and rechargeable type. Disposable (non-rechargeable) button batteries usually start with "CR" logo, and rechargeable type usually start with "LIR", "ML" or "VL". "The logo is the main one.

　　In addition to the first two English marks, there are 4 digits on the battery, the first two are the diameter of the battery (in mm), the last two are the height of the battery (in mm and divided by 10), such as the logo "CR2032" It means that the diameter of the button battery is 20mm and the height is 3.2mm.

　　The button batteries on all kinds of cheap electronic products that are common in our daily life are mostly traditional disposable (non-rechargeable) type, which are low in price and simple in processing technology. Today, in order to meet consumers' demands for high endurance, high safety and individualization of electronic products, major battery manufacturers have begun to gradually produce new rechargeable button batteries with higher energy density, various specifications, and various materials. Because of this, the processing difficulty and technology of the new button battery are also constantly upgrading, and the traditional processing technology has touched the pain point of upgrading the processing technology of the new button battery.

　　The traditional button battery processing technology uses the thermal effect of resistance to thermally fuse the welding sheet and the battery case to form a welded resistance welding. Although this welding technology is convenient and low in cost, its disadvantages are also obvious, such as only for single material welding, unsightly weld marks, inaccurate solder joint size, easy oxidation and blackening, and large ridges. It is greatly affected by the operation of equipment and personnel, and it is easy to cause safety problems such as soldering piece falling off and battery voltage drop of soldering leg. Therefore, resistance welding is no longer suitable for the processing of new button cells with high quality requirements.

　　The new button battery is generally applied to the circuit board during processing, and pins need to be soldered on its surface. According to the needs of different circuit boards, the forms of soldering pins are often various. At the same time, the soldering pins of the new button battery are more complicated, and the resistance welding process is not professional. The existing resistance welding technology cannot meet the high requirements of the new button battery. Quality welding requirements, many button battery manufacturers turn their attention to laser welding technology.

　　Laser welding technology can meet the diversity of button battery processing techniques, such as welding of dissimilar materials (stainless steel, aluminum alloy, nickel, etc.), irregular welding tracks, excellent welding appearance, firm welds, more detailed welding points and more Precisely locate the welding area, etc. Not only that, laser welding can also make the product more consistent and reduce the damage to the battery, avoiding the waste of raw materials. Lianying Laser has been involved in the laser welding and processing business of button batteries as early as 2015 and has continued to this day.

　　Lianying Laser is one of the main suppliers of international advanced precision laser welding equipment and automation solutions. With years of practical experience in the button battery laser welding process, Lianying Laser has upgraded the button battery welding process from traditional resistance welding to today's laser welding. Its technological advantages are shown in the figure below:

　　1. Higher energy density, easier to reach the material absorption threshold (especially high reflective materials, the advantages are more obvious);

　　2. A variety of welding trajectory graphics can be realized. Such as sinusoidal shape, spiral shape, spiral point shape, etc.;

　　3. Welding spots are smaller, the depth-to-width ratio of the weld is larger, and a larger contact area can be obtained under the same solder joint size, and the weld strength and tensile force are greater;

　　4. Higher power density. Its welding principle is different from the traditional welding principle based on large molten pool. It is more similar to the welding effect of mosaic, which can obtain higher weld strength, especially in the welding of dissimilar materials, and can reduce the generation of brittle compounds.

　　In order to cope with the rapid development of electronic products and the new button battery market that has greatly increased demand, Lianying Laser has successively developed button battery double-station tab welding stations, button battery nickel sheet automatic welding stations, and button battery electric testing and labeling. machine, button battery steel case and nickel sheet welding equipment, etc., and also provides various button battery pin welding proofing, laser and automatic welding equipment solutions for a number of button battery enterprises. The following are some cases of the production and processing of Lianying laser button battery:

　　UW button battery equipment · double station tab welding station

　　The equipment can realize battery loading and unloading, double-station automatic switching, front and back tab welding at the same station, laser distance measurement to adjust welding focal length, welding points, straight lines, circles, squares or any plane graphics composed of arcs function. It has high welding precision, good consistency, no damage to the base material, strong tensile force, and high yield.