Continuous Current Rating

Continuous power versus battery nominal voltage graph

At some point in the development of a battery pack design you need to consider the continuous current rating. Do this for charge and discharge as this then gives you one for the fundamental requirements to determine: Plotting continuous power versus system nominal voltage it is possible to see the voltage/power/current design points. Typically electric … Read more

Aluminium Busbar Products

aluminium busbars as used on a battery module

for Cell Contacting Systems and Busbars Aluminium busbar products are used in manifold applications in batteries and battery systems due to their favourable structural, physical, and chemical properties. When it comes to cell contacting systems and busbars, electrical (and thermal) conductivity are decisive for balancing component resistance and cross-section to meet the designed space. However, … Read more

Electrical Contact Resistance

The Electrical Contact Resistance at a metal to metal contact is primarily governed by: The surface structure can be further described by the surface flatness, surface oxidation and water adsorption. These joints in a battery pack will either be welded or bolted. Initially the easiest to think about is the bolted busbar joint. The bolt … Read more

Photo Etching

ACE busbars

Whether prototyping or creating busbars for production runs we often want high quality parts and this is where photo etching comes into it’s own. Advanced Chemical Etching take us through the process of photo etching and how this can be used to create high quality aluminium or copper parts. We are concentrating on busbars, but … Read more

Aluminium Busbar

Tesla Model Y 4680 Busbar

Electrical grade aluminum busbar material also known as ec grade aluminum busbar. 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 common grades of aluminum for electrical busbars: 1060 1100 1350 6063 6101 Cross-Sectional Area … Read more

Electrical System of Battery

The electrical design of the battery pack is associated with fundamental electrical elements. These elements are Busbars, Contactors, Fuses, pre-charge resistors, current sensors, HV (High Voltage) and LV (Low Voltage) Connectors, and wiring harnesses. Busbars are electrically conductive materials that maintain current flow from the cells to the external electrical loads. Aluminum and copper are … Read more