Energy storage welding heating solder case

Can a battery cell casing be welded?

The findings are applicable to all kinds of battery cell casings. 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 is soldered connection resistance?

For soldered connections, the resistance calculated by Eqs. (1) and (2) is more the total connection resistance. Nevertheless, this resistance is used to make the results comparable to previous investigations on welding techniques and press contacts , . 4. Considerations on and modeling of current paths in soldered connections

What is soldering & brazing a battery cell?

As defined by the American Welding Society, soldering is done with solders that melt below 450 °C and brazing with solders melting above this temperature . For battery cells the heat input of the connection process has to be relatively low to not damage the battery cell’s internal electrochemical components.

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.

Can lithium-ion battery cells be soldered with iron soldering?

Of course, due to its massive heat input iron soldering is not the ideal soldering technique for connecting lithium-ion battery cells. Nevertheless, if a solder with a low liquidus temperature is chosen, this technique is applicable for battery cells, as the results proof.

Which solder temperature should be used for battery cells?

Nevertheless, if a solder with a low liquidus temperature is chosen, this technique is applicable for battery cells, as the results proof. For the investigations on the heat input into battery cells, solders with 90 °C, 124 °C, and 145 °C liquidus temperature were used.