Thickened Busbar Connector

Thickened busbar connectors are high-current, pluggable interfaces designed to connect thicker busbars or high-power PCBs, ensuring reliable power distribution and thermal management.

Overview

Thickened busbar connectors are engineered to handle high currents and provide secure, low-resistance connections between busbars, PCBs, and power distribution systems. They are commonly used in electric vehicles (EVs), hybrid vehicles (HEVs), data centers, server racks, and power distribution units. These connectors are designed to accommodate thicker busbars, typically ranging from 0.8mm to 5mm, depending on the application, while maintaining high ampacity and low insertion force .

Key Features

• High Current Capacity: Supports currents from 40A up to 420A or more, depending on the connector type and busbar thickness .
• Pluggable and Separable: Many designs, such as ENNOVI-BusMate and TE CROWN CLIP, allow board-to-blade, board-to-board, or blade-to-blade connections, facilitating assembly, inspection, and maintenance .
• Misalignment Tolerance: Floating contact technology or alignment features allow for stack-up tolerance and blind mating, reducing the risk of damage during installation .
• Thermal Management: Copper busbars with high cross-section efficiently dissipate heat, preventing hot spots and improving reliability .
• Low Contact Resistance: Gold or silver plating and independent contact points reduce energy loss and improve efficiency in high-current applications .

Applications

• EV and HEV Power Systems: Power steering, traction drives, and power conversion systems .
• Data Centers and Servers: High-current distribution in server racks, storage sleds, and BBUs .
• Power Distribution Units: Industrial and commercial power racks, UPS systems, and energy storage systems .
• PCB Integration: Thickened busbars can replace copper inlays in PCBs, increasing current capacity without enlarging PCB size .

Examples of Thickened Busbar Connectors

• ENNOVI-BusMate: Supports 0.8mm and 1mm thick busbars, high power density, and floating contact technology for misalignment tolerance .
• TE Connectivity CROWN CLIP: Mates with 3mm to 5mm thick busbars, providing separable, high-current connections for 12V/48V architectures .
• Amphenol BarKlip®: Board-to-busbar connectors with low-resistance contacts, suitable for EV charging stations and hyper-scale computing .
• Molex PowerPlane: Offers up to ±1mm misalignment tolerance and multiple current rating options for scalable power distribution .
• Würth Elektronik PowerBusbar PCB: Copper busbars pressed with Powerelements and PCBs, allowing selective current capacity increase and efficient heat dissipation .

Design Considerations

When selecting a thickened busbar connector, consider:

• Busbar thickness and material (copper or plated copper)
• Current rating and thermal limits
• Pluggable vs. fixed interface
• Tolerance for misalignment and stack-up
• PCB footprint and assembly method
• Compliance with standards (e.g., OCP ORv3 for data centers) Thickened busbar connectors provide a compact, reliable, and high-performance solution for modern high-power systems, balancing current capacity, thermal management, and ease of assembly.