Lithium Ion Battery Cells — Lesson 6

This lesson covers the intricate details of lithium-ion battery cells, their types, and their functioning. It delves into the three kinds of containers for these cells: cylindrical, pouch, and prismatic. The lesson also explains the components of a cell, including the cathode, anode, and electrolyte. It further discusses the common types of cylindrical cells and their capacities. The lesson also highlights the advantages and disadvantages of different cell types, including their energy density, number of cycles, and ease of pack creation.

Video Highlights

00:17 - Introduction
00:27 - Components of lithium-ion battery cells and its construction
04:23 - Discussion on different types of cells
07:38 - Design of cell
12:31 - Impact of cell failure on battery pack
15:18 - Advantages of cylindrical cells
15:16 - Use of prismatic and pouch cells in large battery packs
16:18 - Home assignments

Key Takeaways

- Lithium-ion battery cells consist of a cathode, anode, separator, and electrolyte.
- The cells come in three types of containers: cylindrical, pouch, and prismatic.
- Cylindrical cells, like the 18650, are common and have a capacity of 2.2 to 3.8 ampere-hour.
- Pouch cells have a high packing efficiency and are often used in larger vehicles.
- Prismatic cells are used in two-wheelers and three-wheelers and can be spot, laser, or ultrasonically welded.
- The failure of a cell, whether by shorting or opening, can significantly impact the battery pack.