Energy storage box welding process

Which welding techniques can be used for connecting battery cells?

Brass (CuZn37) test samples are used for the quantitative comparison of the welding techniques, as this metal can be processed by all three welding techniques. At the end of the presented work, the suitability of resistance spot, ultrasonic and laser beam welding for connecting battery cells is evaluated.

Do welding processes need a power source?

Traditionally, welding processes in the construction sector have relied on conventional power sources, presenting a myriad of challenges. From erratic power supply to high operational costs and environmental concerns, the limitations of these traditional solutions have been evident.

What is weld purging & how does it work?

The technique of inside protection is known as “weld purging” and uses inert gas to flush out air, and thus oxygen, before, during, and after welding while waiting for the joint to cool below its oxidation temperature. Equipment has been developed over the past decade to make purging much easier.

How do you control a weld purge gas?

Purge gas oxygen content can be controlled by using special oxygen-monitoring instruments called Weld Purge Monitors. These instruments not only measure oxygen levels but will also inhibit welding if the level is above a setpoint predetermined by the operator. Recording and analyzing software provides information for quality-control purposes.

How are three welding techniques compared?

Additionally, the three welding techniques are compared quantitatively in terms of ultimate tensile strength, heat input into a battery cell caused by the welding process, and electrical contact resistance.

What materials are used in welding?

The materials include low- and medium-alloy steels that have been specially developed for their high strength. Metallurgists have learned that heating joints prior to and after welding (pre-heating and post-heating) can reduce the sensitivity to cracking quite significantly.