Battery deflagration is shocking! How to control battery quality from the source?
On the evening of May 10, an electric car burned in the elevator of a residential building in Chengdu, Sichuan Province, and the flame instantly engulfed the entire elevator car, injuring five people to varying degrees, including a baby.
Safety risks
There are two main reasons for the battery car fire: lithium battery explosion due to quality problems; the second is the improper use of the battery car, such as overcharge, short circuit, heating and so on.
As the core component of new energy vehicle, the safety of lithium battery has always been the focus of public attention. In the process of lithium battery production and manufacturing, the accuracy and advanced level of production equipment will directly affect the quality, efficiency and consistency of the battery. Laser technology, as an advanced processing technology, plays a great role in the production and manufacture of lithium batteries with its high efficiency, precision, reliability and stability. Laser cutting and laser welding are the most widely used processing methods in lithium battery manufacturing, and are also important links related to the safety of lithium batteries.
Laser cutting
In the production of lithium battery, polar ear cutting is the key process, and the burr of polar ear will cause short circuit of the core, which directly affects its safety performance. Due to the advantages of high beam quality and high pulse repetition rate of pulse fiber lasers, IPG YLPN nanosecond pulse fiber lasers can meet all the requirements of polar ear cutting applications:
High speed machining
No burrs
Metal exposure in non-plain areas
No molten attachment at incision
No Heat Impact Zone
IPG YLPN nanosecond laser ear cutting
IPG YLPN nanosecond pulse series lasers continue to push from the original 100 W to 200 W,300W or more 500 W, so that the cutting speed from 30,45,60 constantly improve, even reach 120 m/min cutting speed, truly achieve high quality, high efficiency cutting.
With the popularization of laser technology, more and more battery manufacturers use laser cutting technology to replace the traditional die cutting technology as the first choice of polar ear cutting. IPG YLPN high power pulse laser has been widely used in head battery manufacturers, and has been long-term verification, product performance has been highly recognized by customers.
Laser welding
Laser welding, especially in the process of high power welding, is prone to spatter, which may lead to short circuit or overheating of the core and have a direct impact on the battery performance.
