What is the differences between battery cell , battery module and battery pack?
In the battery industry , we can often hear professional terms such as battery cell , battery module, and battery pack. Some customers tend to confuse and other customers think that these three are the same concept. In order to make everyone better differences, let me share with you the relation between these three!
In fact, battery cell, battery module and battery pack are different stages of battery application. The structure of a lithium battery generally is battery cell -module- battery pack. The battery cell is the basic unit of the battery system. The process of assembling the battery cells into a group is called “PACK”. It can be a single battery or a battery modules of Series and parallel battery , etc. In order to make everyone a deeper understanding, let’s take our PLB’s battery as an example to introduce the battery cell, battery module and battery pack in detail.
Battery cell
A battery cell refers to a single electrochemical cell containing positive and negative electrodes, and is generally not used directly. Taking PLB battery as an example, our IFR 26650 cylindrical lithium iron phosphate battery is composed of lithium iron phosphate as the positive electrode material, graphite as the negative electrode material, electrolyte, separator and metal casing. The battery cell is the smallest unit of the entire battery pack and the unit where electrical energy is stored. This also means that the quality of the battery cell is the most critical factor affecting the quality of the entire battery pack.
Battery module
When multiple cells are packaged together by the same shell frame and connected with the outside through a unified boundary, a battery module is formed. It can be simply understood that multiple cells are connected in series and parallel to form a group, and accessories are added to support, fix and protect the cells.
When multiple battery modules are packaged and the corresponding BMS and thermal management system are added for joint control or management, such a whole is called a battery pack.
From the manufacturing of battery cells to the production of battery packs, hundreds of complex processes are required to produce battery cells with good consistency, which are then assembled into battery modules according to exquisite designs.Finally, battery packs are finished according to customer needs.
As a professional manufacturer of lithium iron phosphate cells and battery packs, PLB has strict quality control standards for every process from cell to battery module to battery pack. Every cell, every battery module and each battery pack needs to undergo strict factory 100% inspection to ensure that every product delivered to customers is qualitified.