Current-carrying products

Current-carrying products play a crucial role in the automotive industry as they conduct electrical energy efficiently and safely from one component to another. This is usually done in two or three phases. The conductors made of copper or aluminum, some of which are very massive, must be held in position and insulated from each other as well as from the environment (housing).

Busbars
Busbars are flat metal strips or plates made of highly conductive materials such as copper or aluminum. In electric vehicles (BEV), there are a large number of electrical systems and components that need to be connected to each other. These include batteries, pulse inverters, stator windings of the electric motor, other high-voltage consumers and inverters. Busbars serve as central connecting elements to enable the flow of electricity between these components.

Applications

• Battery management systems
• Power distribution units
• Power electronics
• Electric motor
• Connections between the respective parts

Features:

• Oil-tight feed-through of the electrical conductors from the pulse inverter to the stator winding
• Thermoplastics used are halogen-free (electrofriendly - no electrocorrosion from halogens)
• Electrical conductors permanently oil-tight due to bonded and plastic-molded elastomer (micro-gap seal)
• Mounted static seal for permeation-proof sealing of the module against the housing wall
• High axial compensation possible due to seal design
• No micro-gaps between plastic and copper conductor even after ageing thanks to patented sealing process
• Protects the power electronics from penetrating media and corrosion damage

Earthing ring
Capacitively induced voltages and high-frequency circulating currents generated by the inverter in electrical drive units are discharged via the rotor shaft bearings. This causes so-called "pitting" and "rippling" in the bearing as well as degradation of the lubricant, which leads to damage to the running surface and thus to considerable noise emissions and even complete destruction of the bearings. A shaft grounding solution offers the path of least resistance to avoid discharge via the bearings.

Features:

• Low radial forces on the shaft
• Dissipation of electrical stresses
• Low costs compared to conventional systems
• Additional sealing function
• Weight saving
• Easy integration and installation