Pouch Cell Battery Pack Design

The pouch packs are used in consumer military and automotive applications.

Pouch cell battery pack design.

Pouch cell battery packs. To save cost many designs actually use separate contacts for charging and discharging the battery pack. Flow chart coin cell cylinder cell and pouch cell li ion battery. With a simple series chain of cells the battery capacity in amphours is the same as the capacity of the individual cells since the current flows equally through all the cells in the chain.

In 1995 the pouch cell surprised the battery world with a radical new design. 8 channel battery analyzer 0 6 300 ma upto 5v w temperature dcr measurement and laptop software bst8 300 cst. In 1995 the pouch cell surprised the battery world with a radical new design. Eliminating the metal enclosure reduces weight but the cell needs support and allowance to expand in the battery compartment.

The cell to pack battery design is interesting because of what it eliminates rather than adds. The electrolyte soaked battery pouch is heat sealed and placed in a vacuum chamber which removes excess air from inside the pouch. Packing cells in a tube 3 cells. A 4s pack of lfp is the most common replacement for a 12v lead acid battery pack 4p x 3 2v 12 8v nominal.

The pouch cell makes most efficient use of space and achieves 90 95 percent packaging efficiency the highest among battery packs. Custom design and manufacture of state of the art battery chargers battery packs ups and power supplies. Current ev battery packs are composed of a number of individual modules ganged together to form the. Battery pack design considerations and construction details.

For a 3 cell pack you can put the cells in a tube the diameter of the outer circle is 2 16 d. In battery packs with many cells in a series the entire pack can be taken down if a single cell is weak or non operational. Figure 7 illustrates a pouch cell. Engineering guidelines for designing battery packs.

The charging path uses low current power switches to save in the overall bom cost of the system. For cell battery pack. Or save 1 2 mm of width per cell. For battery pack cell.

Liquid electrolyte is injected into an open battery pouch. Rather than using a metallic cylinder and glass to metal electrical feed through conductive foil tabs are welded to the electrodes and brought to the outside in a fully sealed way. See also cell construction.