The conductive busbar of lithium batteries was originally made of Cu. After switching to aluminum, it not only achieved a significant reduction in weight, but also reduced the cost; the conductivity of EC1 alloy is the same as that of pure aluminum 1050-O, but its strength is greater than it 50%; the electrical conductivity of EC2 alloy is only 57% of copper. If the busbar plate thickness is increased to 1.8 times that of Cu, the conducted current can be equal to that of copper. The mechanical properties of aluminum busbar plates are shown in Table 9.
