Internal logistics is a part of the logistics that deals with the flow of materials or information within the organization. In the manufacturing companies, this is focused on the delivery of materials or semi-finished products within the manufacturing companies. Thanks to technological advancement various industries' operation particularly internal logistics has significantly changed. This evolution is driven by Industry 4.0, under which manufacturing industries have embraced automation and smart manufacturing to digitalize these internal flows by using autonomous mobile robots (AMR) or automated guided vehicles (AGV). While automating logistics process eliminates many manual and repetitive operations, it also introduces new challenges such as use the vehicles as effectively as possible and minimizing their energy consumptions as they are dependent on energy sources such as batteries.