Worth a view, a short (4 minute) video supplied by Hyundai, highlighting the production process. You may want to slow it down to see more details as it moves along pretty fast. Details include ICCU, power electric system ,battery pack, AVG -(automatic guided robotic vehicles used in the process), E-GMP, Intensive inspection system, wind tunnel test and crash test. Another one on the high efficiency Heat pump system explained
KCB article on the above videos describes the information briefly displayed. Well worth the read, including battery details (12 cells per module) bundled into a basic type and constant type assembled battery pack according to specifications, and the number of modules mounted in the pack changes accordingly. A big advantage is if one of the cells are damaged, each module can be changed as a unit, which not only reduces repair costs, but also improves manufacturing and quality competitiveness: Also more details on the body assembly panels process: https://thekoreancarblog.com/2021/07/08/hyundais-most-advanced-ev-manufacturing-process/