Copper Busbars vs. Cable Harnesses: Choosing the Right Power Distribution Solution
Power distribution within battery packs is a critical design decision impacting performance, manufacturability, and cost.
Copper Busbars: Structured Power Distribution
**Advantages:** Superior current density, predictable impedance, excellent thermal conductivity, automated assembly compatible, lower total impedance for high-current paths.
**Best For:** Cell-to-busbar welded connections, fixed geometry applications, high-volume automated production, space-constrained designs.
Flexible Cable Assemblies: Adaptable Power Routing
**Advantages:** Absorbs vibration and thermal expansion, accommodates assembly tolerances, field-serviceable, 3D routing flexibility, standardized connector interfaces.
**Best For:** Module-to-module interconnections, serviceable pack architectures, prototype and low-volume production, high thermal cycling applications.
The Hybrid Approach
Many modern pack designs use laminated busbars for intra-module connections and flexible cable assemblies for inter-module routing.
At PowerConnect, we manufacture both busbar and cable assembly solutions for unbiased engineering recommendations.