Bus bar assembly, battery module, and battery pack

A battery module, comprising a bus bar assembly;

• wherein the battery module comprises a plurality of cells, the bus bar assembly comprises a positive bus bar, a negative bus bar, a series-connected bus bar, and a connecting bus bar;
• the connecting bus bar is disposed in the battery module, and the connecting bus bar is arranged to connect two adjacent cells in a first direction in series and to connect two adjacent cells in a second direction in parallel;
• the series-connected bus bar is arranged to connect two adjacent battery modules in series to form a battery group;
• the positive bus bar is connected to a positive terminal of a cell at a positive output terminal of the battery group;
• the negative bus bar is connected to a negative terminal of a cell at a negative output terminal of the battery group;
• and
• 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 parts into at least two separated parts in the second direction, and the at least two separated parts are respectively connected to the negative terminals of the corresponding cells.

A battery pack, comprising a battery module, the battery module comprising a bus bar assembly;

• wherein the battery module comprises a plurality of cells, the bus bar assembly comprises a positive bus bar, a negative bus bar, a series-connected bus bar, and a connecting bus bar;
• the connecting bus bar is disposed in the battery module, and the connecting bus bar is arranged to connect two adjacent cells in a first direction in series and to connect two adjacent cells in a second direction in parallel;
• the series-connected bus bar is arranged to connect two adjacent battery modules in series to form a battery group;
• the positive bus bar is connected to a positive terminal of a cell at a positive output terminal of the battery group;
• the negative bus bar is connected to a negative terminal of a cell at a negative output terminal of the battery group;
• and
• 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 parts into at least two separated parts in the second direction, and the at least two separated parts are respectively connected to the negative terminals of the corresponding cells.