江浪


摘 要:为了解激光焊接在极耳焊接或激光切割在极片切割中的应用,文章简单介绍了激光焊接、激光切割的原理,从电池零件自动检测与零位检测、极耳自动转平与自动转位、激光焊接、自动下料几个方面,阐述了激光焊接在极耳焊接中的应用。并从切割机制、参数调整几个方面,总结了激光切割在极片切割中的应用。得出:激光焊接可以通过自动化控制技术完成极耳的高质量、高速度焊接;激光切割可以在波形、参数选定的前提下,获得热影响小、毛刺少的切割效果。
关键词:激光焊接 极耳焊接 激光切割 极片切割
Application of Laser Welding in Tab Welding
Jiang Lang
Abstract:In order to understand the application of laser welding in pole welding or laser cutting in pole piece cutting, the article briefly introduces the principles of laser welding and laser cutting, from automatic detection of battery parts and zero detection, automatic leveling and automatic rotation of tabs. In terms of indexing, laser welding, and automatic blanking, the application of laser welding in tab welding is explained. From the aspects of cutting mechanism and parameter adjustment, the application of laser cutting in pole piece cutting is summarized. It is concluded that laser welding can complete the high-quality and high-speed welding of the lugs through automatic control technology; laser cutting can obtain the cutting effect with less heat influence and less burrs under the premise of selecting the waveform and parameters.
Key words:laser welding, lug welding, laser cutting, pole piece cutting
1 前言
近二十年來,激光加工技术已成为发展最快的高新技术之一,为传统制造业改造提供了充足支持。相较于传统极耳焊接、极片切割模式而言,激光焊接、激光切割模式可以实现自动化操作,并解决毛刺、露白、掉粉等一系列问题,为锂电池性能的提升提供依据。因此,从激光加工技术的应用入手,探究极耳焊接与极片切割工艺具有非常突出的现实意义。
2 激光焊接与激光切割的原理
2.1 激光焊接
激光焊接主要是将高能量密度激光束作为热源,在功率密度小于104~105W/cm2时,经热传导加热工件表面,进行缓慢焊接,焊接熔深较浅;或者在功率密度超过105~107W/cm2时,通过控制激光脉冲峰值功率、宽度、重复频率、能量促使工件熔化并形成特定熔池,进行快速焊接,焊接熔深较大。
2.2 激光切割
激光切割主要指利用激光切割材料,需要借助光学器件,引导输出高功率激光束。……