Vision-oriented laser welding becomes a new way to improve battery quality

Lithium-ion batteries have a high battery capacity per unit weight, so they are very suitable for use in the consumer electronics industry. Lithium-ion batteries also have some characteristics that are particularly suitable for mobile devices: they can still maintain the charge capacity after a long period of non-use, and the charge capacity can be maintained even if they are charged before being fully discharged. These characteristics are often called 'battery memory, and are the main disadvantages of other secondary batteries (such as nickel metal halide batteries). Safety issues Lithium-based technology has a big disadvantage, that is, lithium will explode in contact with air. , Especially when exposed to water, it is more prone to explosion. Federal regulatory agencies have been paying attention to the safety issues brought about by new battery technology. Data from the Federal Aviation Authority (Federal Aviation Authority) show that from March 20, 1991 to August 2010 During the period of the 3rd, there were 113 incidents of “smoke, fire, extreme high temperature or explosion involving batteries and battery-based equipment. What needs special attention is the fact that the fire caused by the failure of the lithium-ion battery encapsulation is difficult to extinguish, because it will explode when exposed to water and will reignite when exposed to air.　　Although there are the above-mentioned safety concerns, the dual advantages of high capacity and low weight make lithium-ion batteries very suitable for another application-hybrid plug-in vehicles. The safety requirements of the automotive sector force Ru0026D personnel to modify the lithium-ion chemical process to make the battery cells less prone to explosion. However, when manufacturing the battery packaging, it is still necessary to ensure sufficient integrity to pass the rigorous crash test. In applications such as medicine, space, and deep-sea applications, because the environment is very harsh, a small leak will cause catastrophic consequences. The cost of replacing a broken battery is very high, and even life-threatening, so the safety requirements in these applications More stringent.　　These safety factors are closely related to the manufacture of lithium-ion batteries. Manufacturers need to consider two safety issues: one is the safety during the manufacturing of the battery, and the other is the integrity of the product packaging, in order to ensure the safety of use within the battery life and beyond the validity period.　　 A key step in the manufacturing process is the welding of the battery casing. Only by ensuring the integrity of the solder joints, the batteries produced can withstand drops, collisions, high temperatures, and pressure changes. (Please indicate the source for reprinting, please refer to the official website www.gnlaser.com news center)