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BYD Lithium Ion Batteries - Frugal Engineering - Value Engineering
https://en.wikipedia.org/wiki/Lithium-ion_battery
Current and future lithium-ion battery manufacturing
Yangtao Liu, RuihanZhang, Jun Wang, Yan Wang
iScience
Volume 24, Issue 4, 23 April 2021, 102332
The cost of LIBs has dropped from over $1,000/kWh in the early 2000 to ∼$200/kWh currently. At the same time, the specific energy density of LIBs has been increased from 150 Wh/kg to ∼300 Wh/kg in the past decades.
Currently, the manufacturing of LIBs involves slurry mixing, coating, drying, calendering, slitting, vacuum drying, jelly roll fabrication (stacking for pouch cells and winding for cylindrical and prismatic cells), welding, packaging, electrolyte filling, formation, and aging, a multi-staged process being adopted by industry.
Although LIB manufacturers have different cell designs including cylindrical (e.g., Panasonic designed for Tesla), pouch (e.g., LG Chem, A123 Systems, and SK innovation), and prismatic (e.g., Samsung SDI and CATL), the cell manufacturing processes are very similar.
India
The company has invested Rs 250 crore in India so far and set up a 1.5 Gigawatt-hour (GWh) battery pack assembly plant. An electric scooter typically has a 1-2 Kilowatt-hour (kWh) battery pack. One GWh equals a million kWh.
It imports the cells used in the packs, which account for up to 70% of the value of the final product.
The government of India has mandated companies to set up a cell manufacturing plant of at least 5 GWh of cell manufacturing capacity and invest a minimum of Rs 225 crore per GWh to avail the PLI scheme. Exide is thinking of setting up one plant.
https://economictimes.indiatimes.com/industry/renewables/exide-leclanche-joint-venture-nexcharge-eyes-breakeven-in-fy23-as-ev-demand-rises/articleshow/87870585.cms
21 Dec 2021,
Exide Industries, at its board meeting held today, has decided to set up a multi-gigawatt lithium-ion cell manufacturing plant. It also plans to apply for and participate in the Production-Linked Incentive Scheme for National Programme on Advanced Chemistry Cell(ACC) battery Storage, issued by the Ministry of Heavy Industries.
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