Quality control system for analyzing the quality of a battery cell through a volumetric measurement of gas formed during a cell formation process and a method of analyzing the same

A method of analyzing the quality of a battery cell with a quality control system comprising a computational system comprising a processor and a memory and a measurement instrument in electronic communication with the computational system, the method comprising:

• performing a cell formation process of the battery cell;
• collecting a gas formed during the cell formation process in a gas pouch of the battery cell;
• expanding the gas pouch with the gas from a deflated configuration to an inflated configuration;
• measuring a distance D defined by the gas pouch with the measurement instrument, wherein the measurement instrument is a vision system disposed apart from the battery cell and imaging a side profile of the gas pouch, wherein the vision system is configured to collect an image of the side profile of the gas pouch, wherein the image includes the distance D defined as a width of the side profile of the gas pouch;
• transmitting the image from the measurement instrument to the computational system corresponding to the distance;
• analyzing the image with the processor of the computational system by first determining the distance D from the image using pixel information;
• determining a volumetric measurement of the gas within the gas pouch with the computational system from the distance D and a known cross-sectional area of the gas pouch to determine the volumetric measurement;
• comparing the volumetric measurement with the processor to a first threshold and a second threshold stored in the memory, wherein the first threshold is less than the second threshold;
• and
• assessing a quality score for the battery cell with the computational system based upon the comparison of the volumetric measurement to the threshold, wherein the quality score is a low-quality score when the volumetric measurement is below the first threshold and the quality score is a low-quality score when the volumetric measurement is above the second threshold.