High-reliability conductive busbars designed to minimize impedance, optimize thermal performance, and maximize volumetric energy density.
Addressing the critical power density, electromagnetic, and thermal challenges in 800V/1000V+ high-voltage applications.
With EV charging stations transitioning from 150kW to 480kW and megawatt charging systems (MCS) up to 1MW+, traditional cable harnesses fail due to extreme skin effect, bulky form factors, and excessive heat. Multi-layer laminated busbars provide ultra-low stray inductance and uniform thermal spreading essential for Silicon Carbide (SiC) power converters.
Utility-scale Battery Energy Storage Systems (BESS) require continuous high-amperage output with strict cell-to-cell balance. Laminated busbar assemblies mitigate magnetic interference, eliminate voltage drop disparities across rack connections, and resist continuous thermal cycling in containerized BESS setups.
Modern power conversion systems (PCS) operate at high switching frequencies. Laminated busbars feature parallel closely-spaced conductive layers separated by thin high-dielectric films, cancelling reciprocal magnetic fields, cutting voltage overshoot on IGBTs/MOSFETs, and reducing component footprint by over 40%.
In DC fast charging (DCFC) architectures, direct current distribution from AC/DC rectifier modules to charging dispensers demands minimal power losses and tight mechanical tolerances. Laminated busbars serve as the electrical backbone inside power distribution units (PDUs) and power matrix cabinets.
By sandwiching positive and negative conductive plates with engineered insulation materials (such as PET, Kapton, Nomex, or epoxy coating), laminated busbars deliver:
In modern Cell-to-Pack (CTP), Cell-to-Rack, and high-voltage junction boxes within BESS containers, thermal expansion and mechanical vibration pose severe reliability risks. Flexible laminated copper connectors and composite rigid busbars provide structural elasticity to absorb thermal expansions without stressing delicate cell terminals.
Furthermore, bi-metal copper-aluminum composite busbars solve the galvanic corrosion dilemma when joining aluminum battery terminals to external copper distribution switchgear, securing 25+ years of operational longevity.
| Performance Metric | Laminated Busbar Technology | Traditional Heavy Cable Harnesses | Standard Solid Copper Bar |
|---|---|---|---|
| Stray Inductance | Ultra-Low (< 10-25 nH) via field cancellation | High (prone to significant voltage spikes) | Moderate to High |
| Thermal Dissipation | Superior (Large planar surface-to-volume ratio) | Poor (Heat concentrated in bundle core) | Moderate |
| Space & Weight Savings | Up to 45% spatial reduction, structured layout | Bulky, large bend radius required | Heavy, rigid routing constraints |
| Assembly Efficiency | Plug-and-play modular integration (Poka-Yoke) | High labor cost, complex manual routing | Manual bending & custom alignment |
| High-Voltage Safety | Uniform dielectric insulation up to Class H (180°C) | Dependent on external conduit jackets | Requires secondary sleeve or air clearance |
A National-Level High-Tech Enterprise Leading Global Flexible Conductive Connection Technologies
Zhejiang Bridgold Copper Tech Co., Ltd. is a national-level high-tech enterprise specializing in the research, development, design, and production of flexible conductive connection products. The company is located in the Yueqing Economic Development Zone, Wenzhou City, Zhejiang Province, occupying 46,000 m² of land with a total construction area of nearly 100,000 m².
Bridgold is dedicated to the intelligent manufacturing of a comprehensive range of flexible conductive products, including:
Our products are widely used in electric vehicles, energy storage systems, charging infrastructure, wind power, industrial control, rail transit, and medical equipment. With a strong focus on quality and innovation, Bridgold has built a solid reputation both domestically and internationally. Our products are sold throughout China and exported to North America, Europe, Southeast Asia, the Middle East, Africa, and beyond.
As of 2025, Bridgold has accumulated 51 national patents, including 16 invention patents. The company participated in the formulation of the national standard GB/T 37133 "High-voltage connection system for electric vehicles". Our core technologies cover cutting-edge fields such as superconducting connection materials, high thermal conductivity composites, and intelligent manufacturing processes.
Bridgold has established a professional copper connection technology R&D center with strong research capabilities, recognized by the Zhejiang Provincial Government as a "Zhejiang Provincial Enterprise Technology R&D Center" and "Zhejiang Provincial Enterprise Technology Center". These certifications ensure comprehensive technical quality control throughout the entire process—from raw material quality analysis and manufacturing process development to product quality inspection.
As a trusted supplier to many Fortune Global 500 companies and industry leaders, Bridgold has established long-term, stable partnerships with renowned enterprises:
In 2010, the company entered the qualified supplier list for Siemens Healthcare and GE Wind Energy, marking a significant milestone in its global expansion.
To date, our copper braided wire series products rank No.1 in global market share, a testament to our manufacturing excellence and customer trust.
In the new energy vehicle sector, our products have been successfully applied in major automotive brands such as Mercedes-Benz, BAIC, SAIC, JAC, NIO, FAW, and Great Wall Motors, ensuring the safety and performance of automotive electrical connection systems.
Driving operational excellence through automated diffusion welding, automated optical inspection, and digitalized production lines.
Bridgold employs advanced vacuum and high-temperature molecular diffusion welding processes. By fusing multi-layer copper/aluminum foils at the molecular level without filler metals, we guarantee zero contact resistance, maximum mechanical integrity, and exceptional electrical conductivity.
Our labs feature advanced testing instrumentation including micro-ohm resistance meters, thermal shock chambers, salt spray testers, and tensile test benches. In-line automated optical inspection (AOI) ensures strict dimensional accuracy and zero defect rates.
In response to global industrial upgrading and green transformation, Bridgold actively promotes the standardization of products and technologies. Through deep collaboration with universities and research institutions, we tackle common technical challenges in advanced metallurgy and high-current transmission.
Explore our complete range of certified busbar technologies for EV charging piles, energy storage systems, and power conversion equipment.
