Simple energy storage battery cluster

The utility model discloses a simple energy storage battery cluster. The simple energy storage battery cluster comprises a shell assembly and an energy storage assembly arranged in the shell assembly, the energy storage assembly comprises a battery rack, a plurality of battery cavities are formed in the battery rack in a rectangular array mode, a high-voltage box is fixedly installed in one battery cavity, and energy storage units can be installed in the other battery cavities. The energy storage unit comprises two modules, and leading-out poles at one ends of the two modules are electrically connected through a first copper bar; the leading-out poles at the other ends of the two modules are respectively and fixedly provided with a second copper bar, the second copper bar of the first module in one energy storage unit is electrically connected with the connector, and the second copper bar of the second module in one energy storage unit is electrically connected with the high-voltage box or electrically connec