Online monitoring system and method for ultrasonic metal welding quality of battery tab

The invention discloses an online monitoring method for the ultrasonic metal welding quality of a battery tab. The online monitoring method comprises the following steps: S1, mounting and connecting a positive resistance test probe; s2, installing and connecting a cathode resistance test probe; s3, setting a resistance value of a good product; s4, welding the metal part; s5, monitoring and sampling; s6, comparing and analyzing; the invention further provides a battery tab ultrasonic metal welding quality online monitoring system which comprises an ultrasonic welding system and a monitoring system, the ultrasonic welding system is used for welding metal workpieces, and the ultrasonic welding system comprises an ultrasonic generator, a transducer, an amplitude-change pole, a metal welding head and a bottom die. Micro-resistance testing is used as a basic technical means, the resistance testing probe, the metal welding head and the welding bottom die are integrated together, compared with traditional indirect me