How much current does a copper busbar need?

The current is an estimated continuous rating and plotted versus the cross-sectional area in mm 2. The gradient of the “straight line fit” shows that 5.9A/mm 2 is a rough estimate for copper busbar size. However, to be on the safe side of this I would initially size at 5A/mm 2 before doing the detailed electrothermal analysis.

What is a good size for a copper busbar?

The gradient of the “straight line fit” shows that 5.9A/mm 2 is a rough estimate for copper busbar size. However, to be on the safe side of this I would initially size at 5A/mm 2 before doing the detailed electrothermal analysis. An important aspect to consider in all busbar designs is to consider the environment and the materials.

Are busbars good thermal conductors?

These should be a physical clip that is designed for the life of the pack and considers all of the above points and all environmental inputs. Busbars are good electrical and hence good thermal conductors. This means they can conduct heat away or to other components.

What is the difference between copper and aluminium busbars?

Compared to copper busbars aluminium offers a weight and cost save, but requires an increase in cross-sectional area of ~62%. Hence aluminium busbars need more volume for packaging. The highest conductivity is achieved by high purity aluminium (purity of 99.9 wt% Al and higher) in soft temper.

How does a cell busbar thermal model work?

In the case of cylindrical cells it is possible to connect to both the positive and negative terminals of the cell on the top surface. The result is a simplified busbar that gets repeated through the module/pack. Thus leaving the bottom of the cell free for cooling. Cell Busbar Thermal Model Can we build a quite simple cell busbar thermal model?

What are busbars made of?

Busbars are the main electrical connections between cells, modules and connect all of the HV system to the outlet connector. Normally made from copper or aluminium. Careful consideration needs to be taken: Electrical grade aluminum busbar material also known as ec grade aluminum busbar.