Energy storage welding machine electrode copper
The reflectance R at room temperature is also an important parameter for characterizing the structured surfaces. If the reflectivity can already be significantly reduced at.
The measurement of the reflected power during laser beam micro welding is intended to show whether laser structuring of the copper samples is suitable both for.
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6 FAQs about [Energy storage welding machine electrode copper]
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 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 the coupling degree of untreated copper?
At the crossover to the area of untreated copper, the coupling degree drops from 69 to 63%. However, the deep penetration welding process is sustained after the change. On the untreated copper, the process is significantly smoother compared to position A.
What is laser micro welding?
Laser micro welding with fibre lasers (1070 nm) meets the requirements placed on joining technology. Due to the high beam quality, very small spot diameters and thus very high intensities can be achieved. Copper materials of high purity are used to achieve the high conductivity of the electrical connection.
Why is laser beam welding of copper a challenge?
Laser beam welding of copper materials represents a challenge due to the material-specific properties . Copper shows a high thermal conductivity (394 W/ (mK)) and low absorption rate at room temperature for wavelength ranges that include common beam sources such as CO 2 lasers or Nd:YAG lasers (Fig. 3).
How to measure the reflection of laser-structured copper samples during welding?
In order to measure the reflection of the laser-structured copper samples during the welding process, bead-on-plate seams are placed in three positions in the double integrating sphere structure described in Section 3.2. The bead-on-plate seams have a length of 5 mm.