Pouch Cell Battery Pack Design

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.

Pouch cell battery pack design.

See also cell construction. The pouch cell makes most efficient use of space and achieves 90 95 percent packaging efficiency the highest among battery packs. Pouch cell battery packs. For a 3 cell pack you can put the cells in a tube the diameter of the outer circle is 2 16 d.

The cell to pack battery design is interesting because of what it eliminates rather than adds. Flow chart coin cell cylinder cell and pouch cell li ion battery. 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.

Packing cells in a tube 3 cells. For cell battery pack. However lifepo4 is considered the most fire safe sometimes found as a starter battery on small aircraft and they also typically last about twice as long as the common nca ncm 18650 cell packs. 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.

Current ev battery packs are composed of a number of individual modules ganged together to form the. Rather than using a metallic cylinder and glass to metal electrical feed through for insulation conductive foil tabs welded to the electrode and sealed to the pouch carry the positive and negative terminals to the outside. Or save 1 2 mm of width per cell. Liquid electrolyte is injected into an open battery pouch.

To save cost many designs actually use separate contacts for charging and discharging the battery pack. A 4s pack of lfp is the most common replacement for a 12v lead acid battery pack 4p x 3 2v 12 8v nominal. For battery pack cell. The charging path uses low current power switches to save in the overall bom cost of the system.

Engineering guidelines for designing battery packs. Figure 7 illustrates a pouch cell. The pouch packs are used in consumer military and automotive applications. In 1995 the pouch cell surprised the battery world with a radical new design.

An electrode stack is inserted into the resulting form to create a pouch cell. Battery pack design considerations and construction details. Eliminating the metal enclosure reduces weight but the cell needs support and allowance to expand in the battery compartment.