LAMINATED BUSBAR FOR ENERGY STORAGE DEVICE

Laminated busbar (100) for interconnecting a pack (20) of prismatic electrical cells (22) in a module (10) from an electrical battery. The cells are configured to be arranged in groups (30) having each the same number of cells. The busbar comprises: - a first electrically conductive layer (110), with at least one electrically conducting element (112), each configured to connect electric poles (28) of two adjacent groups of cells, - a first electrically insulating layer (130), laminated on the first conductive layer, - a first electrical connector (114), configured to be connected to a first group (30A) of cells. Advantageously, the laminated busbar comprises a second electrically conductive layer (140), which is laminated onto the first insulating layer and comprises a second electrical connector (142), configured to be connected to a last group (30B) of cells, and a third electrical connector (144), which is closer to the first electrical connector than to the second electrical connector. The first insulating layer comprises a cut-out window (134), configured to allow the electrical connection of the second electrical connector with the last group of cells.