From Simplicity To Simplicity, The Integration Of Electric Vehicles Starts From The Busbar

Why Are Laminated Busbars Ideal For High Voltage Connections?

 

High-voltage connections run through the power battery, electric drive and other electronic components and are an essential component of the vehicle's electrical architecture.

 

The carriers of high-voltage connections are usually cables, traditional busbars and laminated busbars. Compared with the first two types, the laminated busbar has stronger advantages in both electrical and mechanical properties, making it a key method for low-inductance power transmission paths.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrical Characteristics Are Mainly Reflected In Current Carrying Capacity, Creepage Distance And Inductance.

 

Busbars support 15% more power than cables with the same cross-sectional area. They are regarded as highways in power distribution systems, so they are valued in scenarios that carry high currents. The laminated busbar laminated multiple layers of copper bars and insulating materials into a whole. The area of ​​the conductive layer is increased, which increases the current carrying capacity and increases the heat dissipation surface. It can work with voltages up to several thousand volts and currents up to 1000A.

This integrated installation also allows for better control over creepage distances. Considering the insulation requirements of electric vehicles on the 800V voltage platform, the use of laminated busbars becomes more meaningful.

 

The inductance of the laminated busbar is much smaller than that of the copper busbar, which can greatly reduce the distributed inductance, reduce voltage spikes to a certain extent, and protect IGBT and other electronics. In particular, SiC semiconductor devices have higher switching frequencies, so their stray inductance must be as low as possible to avoid excessive spikes.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mechanical Features Lie In Flexible Design And Reliability.

 

Unlike cables, the design of laminated busbars can be diversified, such as L-shaped, U-shaped, and long strips, to form more precise angles. Various bends allow it to fit more closely to the contours of the vehicle. The rigid structure can better adapt to automated assembly, making installation simple and fast.

Since electric vehicles will constantly vibrate while driving, the electric energy veins at the bottom often affect the whole body. High-voltage connections must be durable, able to withstand high levels of vibration, and function properly in extreme temperature environments. The laminated busbar has the rigidity to connect high-voltage components and ensure the safety of drivers and passengers.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As a result, the laminated busbar has become an ideal choice for high-voltage connections in electric vehicles, playing an important role in the current input, conversion, and output of the inverter, inside the power battery, and in all aspects of power distribution.

 

Furthermore, in the face of the current and future integration of key components such as power batteries and electric drives, laminated busbars will play a higher value in the rapid interconnection with other components.