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Evaluation of the influence of particle contamination depending on the separator and compression using the Hi-Pot Test
  • Bachelor and Master Thesis
    • Battery research: Selective laser sintering for use in future batteries
    • Evaluation of the influence of particle contamination depending on the separator and compression using the Hi-Pot Test
    • Contacting of metal-polymer current collectors for use in cylindrical cells: Concept development and validation
    • Optimization of a bending test for the mechanical characterization of battery electrodes
    • Influence of cutting process and free cut edge geometry on the Al-5083 fatigue strength
    • Design and testing of a device and method for the in-situ calibration of force sensors in the die casting process
    • Laser beam assembly of lithium metal anodes
    • Laser pretreatment of die-cast aluminium for in-mold assembly with plastic
    • Prediction of component properties in high-pressure die casting using machine learning
    • Remelting effect on temperature field, residual stress, and distortion in WAAM components
    • Residual stress variations during fabrication
    • Conversion and test of a heating system
    • Investigation of the local suitability for adhesive bonding of aluminium die-cast components
    • Investigation of the local suitability for welding of aluminium die-cast components
    • Influence of thermal cutting processes on the quality of the cut edges
    • Toughness of high strength welded steels

Evaluation of the influence of particle contamination depending on the separator and compression using the Hi-Pot Test

Background

In battery production, electrodes are manufactured in a roll-to-roll process. In order to be able to produce pouch cells from these, they must therefore be separated in an intermediate step. Common processes here are mechanical cutting and laser cutting. Laser beam welding is wear-free. However, it results in particle contamination, which can in principle penetrate the separator and have a negative impact on battery functionality. The Hi-Pot test has proven to be a quick and simple method of checking for damage to the separator. However, the method is highly dependent on the type of separator and the applied pressure.

The purpose of the work is to evaluate the influence of particle contamination by the Hi-Pot test. This should be done depending on the separator material and the pressure. For this purpose, electrodes must first be assembled and provided with a defined amount of impurities. Electrode-separator composites are then tested with the Hi-Pot Test.

Task

  • Literature research on the current status of laser cutting of electrodes, the influence of particle contamination, as well as the Hi-Pot test and alternative test methods
  • Development of the test setup
  • Carrying out experiments and comparing the results
  • Interpretation of the results


Scope of the work:

The student work can be carried out as part of a Bachelor's, student research project or Master's thesis.

Requirements

  • Study at faculty 4 or 5
  • Good knowledge of German and English
  • High motivation, independent and structured way of working, as well as reliable documentation

Start

By arrangement, preferably immediately.

Hakon Gruhn
+ 49 531 391 95597
h.gruhn(at)tu-braunschweig.de
Hakon Gruhn
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