An assembly set for assembling a carrier framework for a stack of battery cell blocks, the assembly set comprising: one or more Z-shaped busbars; a first frame beam and a second frame beam; wherein each of the Z-shaped busbars comprises: - a positive plate configured for connecting to positive terminals of battery cells of a battery cell block; - a negative plate configured for connecting to negative terminals of battery cells of a further battery cell block; and - a connection plate connecting the positive plate and the negative plate; wherein each of the Z-shaped busbars further comprises: - a first fastening means configured for being fastened to the first frame beam; and - a second fastening means configured for being fastened to the second frame beam; and wherein the first frame beam comprises one or more first fastening elements such that all of the one or more Z-shaped busbars can be connected with the respective first fastening means of the Z-shaped busbars to the first frame beam; wherein the second frame beam comprises one or more second fastening elements such that all of the one or more Z-shaped busbars can be connected with the respective second fastening means of the Z-shaped busbars to the second frame beam; wherein, in a state when each Z-shaped busbar is connected, with the positive plate of this Z-shaped busbar, to the positive terminals of the battery cells of one of the battery cell blocks and is further connected, with the negative plate of this Z-shaped busbar, to the negative terminals of the battery cells of another one of the battery cell blocks, the first frame beam is connectable to each of the Z-shaped busbars, and wherein the second frame beam is connectable to each of the Z-shaped busbars: and wherein the connection plate of each of the Z-shaped busbars is configured for separating a pair of battery cell blocks, when one battery cell block of the pair of battery cell blocks is connected to the positive plate of the Z-shaped busbar and the other battery cell block of the pair of battery cell blocks is connected to the negative plate of the Z-shaped busbar. one or more Z-shaped busbars; a first frame beam and a second frame beam; wherein each of the Z-shaped busbars comprises: - a positive plate configured for connecting to positive terminals of battery cells of a battery cell block; - a negative plate configured for connecting to negative terminals of battery cells of a further battery cell block; and - a connection plate connecting the positive plate and the negative plate; - a positive plate configured for connecting to positive terminals of battery cells of a battery cell block; - a negative plate configured for connecting to negative terminals of battery cells of a further battery cell block; and - a connection plate connecting the positive plate and the negative plate; wherein each of the Z-shaped busbars further comprises: - a first fastening means configured for being fastened to the first frame beam; and - a second fastening means configured for being fastened to the second frame beam; and - a first fastening means configured for being fastened to the first frame beam; and - a second fastening means configured for being fastened to the second frame beam; and wherein the first frame beam comprises one or more first fastening elements such that all of the one or more Z-shaped busbars can be connected with the respective first fastening means of the Z-shaped busbars to the first frame beam; wherein the second frame beam comprises one or more second fastening elements such that all of the one or more Z-shaped busbars can be connected with the respective second fastening means of the Z-shaped busbars to the second frame beam; wherein, in a state when each Z-shaped busbar is connected, with the positive plate of this Z-shaped busbar, to the positive terminals of the battery cells of one of the battery cell blocks and is further connected, with the negative plate of this Z-shaped busbar, to the negative terminals of the battery cells of another one of the battery cell blocks, the first frame beam is connectable to each of the Z-shaped busbars, and wherein the second frame beam is connectable to each of the Z-shaped busbars: and wherein the connection plate of each of the Z-shaped busbars is configured for separating a pair of battery cell blocks, when one battery cell block of the pair of battery cell blocks is connected to the positive plate of the Z-shaped busbar and the other battery cell block of the pair of battery cell blocks is connected to the negative plate of the Z-shaped busbar.