High-capacity energy storage battery device

The utility model provides a large-capacity energy storage battery device, which comprises a box body, a partition plate, a box cover and at least two battery modules, each battery module comprises a support assembly and at least two battery cells, the support assembly is combined with the at least two battery cells and fixes the at least two battery cells, the box body is provided with a cavity with an opening towards one side, and the partition plate is arranged in the cavity. The partition plate is arranged in the cavity and connected with the box body, the cavity is divided into at least two small cavities by the partition plate, the at least two battery modules are arranged in the at least two small cavities, the box cover is mounted on an opening of the cavity in a matched manner, and the partition plate is connected with and supports the box cover. According to the battery device, the positions of the battery modules are limited through the partition plates, the battery modules are separated, meanwhile