Intellectual and modular energy-storing device and management system employing same

An intellectual and modular energy-storing device, which is coupled to a load and a control center, is disclosed. The energy-storing device includes a main module and a plurality of sub-modules. The main module is coupled to the control center for allowing the energy-storing device and the control center to transmit and change information with each other. The sub-modules are coupled to the main module respectively, and the sub-modules are connected in series and further connected to the load and supply power to the load. Each sub-module includes a grounding and insulation unit for connecting to a ground so that the grounds between each sub-module and the main module are isolated with each other. When one of the sub-modules is failure or breakdown, the sub-module can perform a detection and protection automatically and the main module can transmit a signal issued from the sub-module to the control center automatically.