Copper-Aluminum Composite Material
Innovative Semi-Melt Rolling Composite Technology
Reduce weight and improve energy efficiency
High-Performance Solutions
- Excellent Conductivity
- Lightweight Design
- High Cost Effectiveness
What is Copper-Aluminum Composite Material?
Copper-aluminum composite material is an innovative material formed through metallurgical bonding of copper and aluminum under high temperature, high pressure, and oxygen-free conditions using semi-melt rolling composite technology.
High Conductivity
Inherits copper's excellent conductivity
Lightweight
Utilizes aluminum's low density to reduce weight
Cost Effectiveness
Balances performance and cost
Metallurgical Bonding
100% metallurgical bonding ensures reliability
Production Process
Material Preparation & Melting
Aluminum ingots melted in furnace
Refining & Holding
Liquid aluminum delivered through launder
Semi-Melt Rolling Composite
Copper strip and liquid aluminum composite under pressure rollers
Cooling & Forming
Composite material cooled and coiled
Quality Inspection
Strict quality control
Technical Advantages
Comparison of Copper-Aluminum Composite Processes
| Comparison Item | Semi-Melt Rolling (Solid-Liquid) | Rolling (Solid-Solid) | Friction Welding |
|---|---|---|---|
| Process Principle | During aluminum solidification, copper and aluminum are pressed together by rolling force, forming metallurgical bonding in seconds | Both metal surfaces are roughened, then mechanical bonding formed under rolling force, followed by diffusion annealing | Under pressure and high-speed friction, material temperature rises and plastic deformation occurs |
| Interfacial Layer Thickness | below 2 μm | 5-20μm | Uneven thickness, 2–5 μm |
| Interfacial Oxide Condition | No oxides at interface | Visible oxides at interface | Small amount of oxides |
| Peel Strength | >15N/mm | <10N/mm | >15N/mm |
| Efficiency | High | High | Low |
| Cost | Comparable, slightly lower | Comparable | High |
| Energy & Environment | This section has aluminum melting, higher energy consumption; but shorter product chain, energy efficient; | This section is smaller, but overall process is higher; | This section is smaller, but parts require CNC, low efficiency, higher overall energy consumption; |
| Application Status | Since 2018, fully verified by CATL, BYD, and Gotion High-tech; | Trial in power lithium battery industry, no mass application due to reliability issues; | Early applications in power lithium batteries, being phased out, mainly used in energy storage industry. |
Our semi-melt rolling composite technology has significant advantages in interfacial layer thickness, oxide control, peel strength, production efficiency, and cost effectiveness.
Application Fields
Battery Industry
Used for power battery negative terminal conversion
Power Industry
Applied in high-current environments such as power grid stations
Heat Sink Field
Used for IGBT chip and LED heat dissipation
Looking for High-Performance Solutions?
Bozhong New Energy provides innovative semi-melt rolling composite technology
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