Specialized rigid and flexible copper conductors designed for high current density, superior thermal dissipation, and dynamic vibration mitigation.
Addressing the rigorous electrical, thermal, and mechanical stresses in heavy industrial continuous duty applications.
Carbon brush shunts and connection busbars demand high flex-life copper braid to maintain steady micro-ohm surface contact across high-RPM commutators and slip rings, preventing arcing, sparking, and localized thermal runaway under fluctuating heavy loads.
High-torque industrial motors generate severe low-frequency and high-frequency harmonics. Laminated and stranded copper bus connectors act as mechanical dampeners, safeguarding delicate motor terminal blocks and battery inverter junctions against structural fatigue.
Advanced epoxy spray, polyimide films, and PVC dip insulation provide dielectric isolation up to Class H/N standards. They maximize thermal conductivity away from stator terminals and carbon brush holders, extending insulation life in harsh environments.
Industrial electric drivetrains, traction motors, mining excavators, heavy-duty cranes, and industrial DC motors rely on seamless power delivery paths. In high-power battery-driven industrial machinery and automated energy storage-assisted motor drives, the power busbar is the lifeline connecting battery packs, traction inverters, motor controllers, and dynamic carbon brush gear. Using electrolytic tough pitch (ETP) or oxygen-free (OF) copper (with electrical conductivity ≥ 100% IACS), modern busbars engineered by Bridgold minimize resistive losses (I²R), directly improving system efficiency and keeping operational temperatures within safe thresholds.
In carbon brush holder assemblies, flexible copper shunts and braided busbars play a vital role. The constant axial motion of carbon brushes as they wear requires flexible pigtail conductors that exhibit near-zero mechanical resistance while handling high current densities. Improperly designed wiring creates asymmetrical current sharing among parallel brushes, accelerating brush wear, commutator groove pitting, and catastrophic motor flashover. Bridgold’s precision ferrule crimping and molecular diffusion-welded terminals eliminate transition resistance, ensuring balanced current distribution across all brush arms.
Strategic technological shifts shaping the future of industrial motor electrification and heavy-duty battery busbars.
The global transition toward electrified heavy equipment, battery-electric utility vehicles (BEVs), and high-voltage industrial automation has drastically shifted component performance benchmarks. Key industry developments include:
Industrial battery motors are rapidly stepping up voltage to reduce line losses and weight. This shift mandates busbars insulated with automated epoxy electrostatic spraying and polyimide dielectric wrapping to resist partial discharge and dielectric breakdown.
Solid-state molecular diffusion welding of laminated copper foils creates homogeneous solid connection lugs without brazing flux, offering zero interface resistance and withstand strength against extreme thermal cycling.
Modern industrial equipment manufacturers require certified raw material provenance. Bridgold utilizes premium high-grade refined copper processed through energy-efficient, lean, and automated production facilities with minimal carbon footprint.
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 a trusted supplier to many Fortune Global 500 companies and industry leaders, Bridgold has established long-term, stable partnerships with renowned enterprises such as:
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.
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.
In response to global industrial upgrading and green transformation, Bridgold continues to advance intelligent manufacturing and digital transformation. We have invested in the development and introduction of high-end manufacturing and testing equipment, building a personalized, digitalized, efficient, and standardized intelligent manufacturing system. The company actively promotes the standardization of products and technologies by participating in the formulation of industry standards. Through industry-university-research collaboration with universities and research institutions, we jointly tackle common technical challenges in the industry, building distinctive technological advantages.
Explore our full line of rigid, flexible braided, stranded, and insulated laminated copper connection products.
