BUS BAR ASSEMBLY, BATTERY MODULE, AND BATTERY PACK

A bus bar assembly, a battery module, and a battery pack are provided. The bus bar assembly includes a positive bus bar, a negative bus bar, a series-connected bus bar, and a connecting bus bar. All of parts of the connecting bus bar, the series-connected bus bar, and the negative bus bar respectively connected to negative terminals of corresponding cells are defined as negative electrode parts. At least one partition slot is defined on each of the negative electrode parts, and the at least one partition slot is defined to separate the negative electrode part into at least two separated parts in a second direction. The at least two separated parts are respectively connected to the negative terminal of corresponding cells.