The structure of a modular lithium battery system consists of individual battery modules that can be easily assembled or substituted. This facilitates adjustability in terms of configuring the battery system to meet the desired energy specifications. For instance, in an energy storage system at home, additional modules may be incorporated as the energy needs of the home increase. They are a solution for configuration and customization, alongside simple maintenance. Modular systems are easier to maintain because a single faulty module can be changed without needing to renew the entire battery system. They are most ideal in cases needing easy modification and growth such as in grid energy storage projects, vehicle fleets, and other scenarios that require swift scalability.