Battery pack

There is provided a battery pack including: a cell holder to which a plurality of battery cells are assembled; and a bus bar assembly including a bus bar electrically connecting the plurality of battery cells to each other and a protrusion protruding from the bus bar to at least a portion of a thickness of the cell holder. The plurality of battery cells are arranged on a first side of the cell holder, and the bus bar assembly is located on a second side of the cell holder opposite the first side of the cell holder. A cell holder integral with a bus bar can be provided by insert injection molding, and the bus bar is firmly fixed at a proper position on the cell holder. 提供了一种电池组，所述电池组包括：单体保持器，多个电池单体组装到单体保持器；以及汇流条组件，包括将多个电池单体彼此电连接的汇流条以及从汇流条到单体保持器的厚度的至少一部分凸出的凸起。多个电池单体布置在单体保持器的第一侧，并且汇流条组件位于单体保持器的与单体保持器的第一侧相对的第二侧。可以通过嵌件注入成型提供与汇流条为一体的单体保持器，汇流条牢固地固定在单体保持器上的适当位置处。