Lithium Polymer Battery Cell Balancing

The application is designed for battery packs with two three or four li ion or li pol cells in a series.

Lithium polymer battery cell balancing.

Without the enhancement of cell balancing a conservative design does not allow the soc to approach 100. The battery cells are connected in series and all cells are charged with the same current. Equalizing the socs of the various cells in a battery. We balance lipo batteries to ensure each cell discharges the same amount.

Designing balancing algorithms and gives examples of successful cell balancings. An example of how to bottom balance your lithium battery pack. Serial battery connection is required for higher voltages if the charger does not have balancing deterioration occurs according to the capacity of the batteries the batteries that are loaded. Variations in cell resistance.

It includes dedicated pc based software for real time viewing and analysis of the charge cell balance and fuel gauge processes. This helps with the performance of the battery. Two basic types of li ion have emerged. The energy cell and the power cell.

What balancing does not do is take care of the 4th one. Means used to perform cell balancing typically include by passing some of the cells during charge and sometimes. Balancing is a term we use to describe the act of equalizing the voltage of each cell in a battery pack. Cell balancing is necessary for highly transient lithium battery applications especially those applications where charging occurs frequently such as regenerative braking in electric vehicle ev or hybrid electric vehicle hev applications.

An2344 integrates cell balancing and fuel gauge methods into a multi cell battery charger. Introduction different algorithms of cell balancing are often discussed when multiple serial cells are used in a battery pack for particular device. Lithium polymer or li po refers to a lithium ion battery that uses a polymer electrolyte instead of a liquid electrolyte. The early li ion battery was considered fragile and unsuitable for high loads.

This enables the construction of pouch cells with different geometries. The use of cell balancing enables the system engineer to select a battery with larger capacity for an application because balancing allows the battery to achieve a higher state of charge soc. This has changed and today lithium based systems stand shoulder to shoulder with the robust nickel and lead chemistries. Balancing takes care only of the 1st one.

Learn about the difference of energy and power requirements in a battery. Cell to cell variations in leakage. In so doing it compensates also for the 2nd one.