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Precision copper materials engineered for the demands of modern automotive manufacturing and EV systems.
Understanding the material that powers modern automotive innovation
C11000 copper, also known as Electrolytic Tough Pitch (ETP) copper, is one of the most widely used grades of commercially pure copper in the world, with a minimum copper content of 99.90%. Defined by its exceptional electrical conductivity — reaching up to 101% IACS (International Annealed Copper Standard) — C11000 copper sheet has become an indispensable material across a broad spectrum of automotive applications, from traditional internal combustion engine vehicles to next-generation battery electric vehicles (BEVs) and hybrid electric vehicles (HEVs).
As the global automotive industry undergoes its most transformative shift in a century — driven by electrification, lightweighting, and intelligent connectivity — the demand for high-performance conductive materials has surged dramatically. C11000 copper sheet sits at the center of this revolution, enabling the efficient transfer of electrical energy, heat management, and structural integrity in critical vehicle systems.
At Sichuan Kepai New Materials Co., Ltd., we have engineered our C11000 copper sheet products to meet the exacting standards of automotive OEMs and Tier-1 suppliers worldwide. With state-of-the-art smelting, extrusion, and precision rolling processes, our copper sheets deliver consistent quality, tight dimensional tolerances, and superior surface finish — batch after batch.
Why automotive engineers specify C11000 for mission-critical components
Up to 101% IACS electrical conductivity makes C11000 the benchmark for busbars, battery terminals, and wiring harness components where minimal resistance losses are critical.
With thermal conductivity of approximately 391 W/m·K, C11000 copper sheet efficiently dissipates heat in battery cooling plates, motor windings, and power electronics substrates.
High ductility and excellent cold-working characteristics allow C11000 to be stamped, deep-drawn, and formed into complex automotive geometries without cracking or delamination.
Natural corrosion resistance ensures long service life in harsh automotive environments, including exposure to coolants, road salts, and humidity cycling in engine bays and battery enclosures.
C11000 copper is 100% recyclable without any loss of properties, aligning with automotive OEM sustainability mandates and circular economy goals for end-of-life vehicle processing.
Precision rolling and straightening processes at Kepai deliver thickness tolerances as tight as ±0.01mm, essential for automated assembly lines and high-precision stamping dies.
A single battery electric vehicle contains up to 83 kg of copper — four times more than a conventional ICE vehicle. C11000 copper sheet is at the heart of this demand surge, used in battery cell interconnects, busbars, motor laminations, charging infrastructure, and power distribution units. As global EV sales are projected to exceed 45 million units annually by 2030, the strategic importance of high-quality C11000 copper sheet in the automotive supply chain has never been greater.
Where C11000 copper sheet delivers measurable performance advantages across the vehicle
| Application Area | Component | Why C11000 | Performance Benefit |
|---|---|---|---|
| Battery Systems (BEV/HEV) | Cell-to-cell busbars, battery pack terminals, current collectors | Highest conductivity, low contact resistance | Reduces energy loss by up to 15%, extends battery cycle life |
| Electric Motor | Motor windings, laminated stator sheets, rotor conductors | Ultra-pure composition, excellent formability | Improves motor efficiency to 97%+, reduces heat generation |
| Power Electronics | Inverter substrates, DC-DC converter busbars, IGBT heat spreaders | Superior thermal + electrical conductivity | Enables compact, high-power-density designs for 800V platforms |
| Wiring Harness | Flat flexible cables (FFC), stamped terminals, shielding tapes | Excellent drawability, surface quality | Supports high-speed data transmission for ADAS and V2X systems |
| Charging Infrastructure | Fast-charger busbars, charging gun contacts, cable conductors | Handles 350kW+ peak power loads | Enables 10-minute 20–80% charge cycles on next-gen platforms |
| Thermal Management | Battery cooling plates, heat exchanger fins, cold plates | Highest thermal conductivity among copper grades | Maintains battery temperature within optimal 20–40°C range |
| Electromagnetic Shielding | EMI/RFI shielding for ECUs, ADAS sensors, infotainment modules | Excellent shielding effectiveness across GHz frequencies | Ensures signal integrity for radar, LiDAR, and 5G connectivity |
Commercial and industrial dynamics driving the next decade of copper sheet innovation
As automakers like Porsche, Hyundai, and GM transition to 800V battery platforms for ultra-fast charging, the thermal and electrical demands on busbars and interconnects intensify dramatically. C11000 copper sheet with enhanced surface treatment and tighter thickness control is increasingly specified for these next-generation systems, where even marginal resistance increases translate to significant heat generation and efficiency losses.
The proliferation of battery gigafactories across North America, Europe, and Asia has created concentrated, high-volume demand hubs for C11000 copper sheet. Tier-1 suppliers and battery manufacturers require JIT delivery, certified material traceability, and consistent batch-to-batch quality — capabilities that Kepai has built into its production and QC systems to serve these demanding customers.
Automotive OEMs under pressure to achieve carbon neutrality by 2035–2050 are increasingly evaluating the lifecycle carbon footprint of all materials. C11000 copper sheet produced with renewable energy inputs and recycled copper feedstock offers significant embodied carbon advantages. Kepai's commitment to sustainable production aligns directly with these OEM procurement mandates.
Modern vehicles now integrate hundreds of sensors, cameras, radar units, and high-speed data buses. The electromagnetic shielding and signal integrity requirements of these systems demand copper sheet with exceptional surface cleanliness and controlled oxygen content. C11000's properties make it the preferred choice for EMI shielding tapes and high-frequency signal ground planes in next-generation ADAS architectures.
Automotive engineers are specifying thinner-gauge C11000 copper sheet — as thin as 0.05mm — to reduce vehicle weight without sacrificing conductivity. This trend demands advanced rolling technology and ultra-precise thickness control, areas where Kepai's investments in microcomputer-controlled processing equipment provide a clear competitive advantage.
Post-pandemic supply chain disruptions have accelerated automotive OEM strategies to localize critical material sourcing. Sichuan Kepai, strategically located in China's industrial heartland with direct access to National Highway 108 and Guanghan Industrial Development Zone infrastructure, is ideally positioned to serve both domestic and export markets with reliable, high-quality C11000 copper sheet supply.
Sichuan Kepai New Material Co., Ltd.
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales. Currently, the factory covers an area of approximately 9,000 square meters, with an office space of about 1,000 square meters. The company primarily engages in the production of strategic emerging new materials for the national 13th Five-Year Plan, including special copper alloys such as tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper, while also focusing on the research and development of high-conductivity, easy-to-machine, high-strength copper alloys. The products are mainly applied in high-tech fields such as new energy vehicles, 5G technology, laser cutting, and lithium battery relays.
The company is located in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, boasting a superior geographical location and convenient transportation, which lays a solid foundation for the rapid development of the enterprise. Since its establishment, Kepai has adhered to the business philosophy of "innovation-driven development, quality wins the market," committed to providing customers with the highest quality high-end copper alloy materials, and promoting industrial upgrading and sustainable development.
Technological innovation is the core competitiveness of Sichuan Kepai New Materials Co., Ltd. The company has a research and development and production team composed of senior industry experts who keep pace with international cutting-edge technology trends and continuously explore the unknown boundaries in the field of new copper alloy materials. Through a combination of independent research and development and industry-university-research collaboration, Kepai has made breakthrough progress in several areas, including high-performance tellurium copper, lead copper, and sulfur copper. Many of its technological achievements have reached international advanced levels and have been successfully applied in various industries such as new energy vehicles, precision machining parts, plasma cutting, relays, and energy storage, earning widespread recognition and praise in the market.
Kepai's product line is rich and diverse, covering a comprehensive range of solutions from basic materials to high-end customization. We focus on providing customers with high-performance, high-quality high-end copper alloy products, including but not limited to pure copper, oxygen-free copper, oxygen-free high-conductivity tellurium copper, nickel tellurium copper, tin bronze, beryllium copper, lead bronze, sulfur copper, and chromium zirconium copper. These products play an important role in reducing production costs and enhancing product performance due to their excellent physical and chemical properties and environmental friendliness, creating significant economic and social benefits for customers.
In the face of global market competition, Sichuan Kepai New Materials adheres to the development strategy of "rooted in Sichuan, radiating nationwide, and moving towards the world." By continuously optimizing market layout and improving the sales network, we have established a stable customer base in multiple provinces and cities across the country and have formed long-term cooperative relationships with several internationally renowned enterprises. At the same time, the company actively expands into overseas markets, participates in international competition and cooperation, and strives to promote Kepai's brand influence on the global stage.
We understand that the long-term development of an enterprise is inseparable from an excellent corporate culture. We advocate the corporate spirit of "integrity, innovation, collaboration, and win-win," encouraging employees to explore boldly and innovate courageously, while also emphasizing teamwork and talent cultivation, striving to create a harmonious, open, and inclusive work atmosphere. We believe that only by continuously pursuing excellence and creating value can we win the trust of customers and the respect of society.
Advanced manufacturing and testing infrastructure ensuring C11000 copper sheet quality for automotive applications
Smelting
Laying-off
Extrusion
Drawing
Straightening
Package
Eddy Current Conductance Instrument
Chemical Composition Test Room
Metallographic Sample Polishing Machine
Microcomputer Controlled Electro-Hydraulic Servo Universal Testing Machine
Liquid Crystal Display Electronic Universal Testing Machine
Hardness Tester
Explore our full range of high-performance copper materials engineered for automotive and industrial applications
UNS C51900 Copper Alloy — Automotive Spring Contacts
High Performance Lead Copper Bronze — Automotive Bushings
Free-Cutting Sulfur Copper — Automotive Fasteners
C19160 High Strength Copper Alloy — EV Terminals
C54400 Copper Alloy — Automotive Valve Components
High Performance Tellurium Copper — Automotive Electrodes
C17200 Beryllium Copper Alloy — Automotive Sensors
C14700 Sulfur Copper — Automotive Production Efficiency
Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to uphold its original intention, with even greater enthusiasm and determination, to engage in research and application in the field of new materials, contributing to the development of the new copper alloy materials industry in China and globally. We look forward to working hand in hand with friends from all walks of life to create a brilliant future together!
