Aluminum Diffusion Welder Manufacturer

Your Leading Aluminium Diffusion Welder Manufacturer

Haifei aluminium diffusion welders are developed for laminated aluminium foils, flexible busbar terminals and selected aluminium conductive components. The equipment uses controlled electrical resistance heating and pressure to consolidate the required joint area without conventional filler metal.

Available configurations include pneumatic, pneumatic-hydraulic, hydraulic and servo-controlled pressure systems. Machine selection depends on the aluminium grade, surface condition, individual foil thickness, number of layers, bonding dimensions, finished terminal thickness and required production output.

Customers can submit workpiece drawings and representative samples for process evaluation. Haifei can review the joint structure, conduct sample trials where applicable, design dedicated tooling and recommend a suitable equipment configuration.

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What Is Diffusion Welding for Aluminium Busbars?

Diffusion welding is a solid-state joining process that uses controlled heat and pressure to bond contacting metal surfaces without adding solder or filler metal. In aluminium busbar production, the process is mainly used to consolidate the terminal sections of stacked aluminium foils while retaining flexibility in the unbonded area.

During the process, prepared aluminium foils are aligned inside dedicated tooling. Pressure is applied across the required bonding area, followed by controlled heating and holding. The stack remains compressed during heating and cooling so that the terminal reaches the required thickness and shape.

The aluminium diffusion welder must be selected according to the aluminium grade, individual foil thickness, number of layers, bonding dimensions and required finished terminal thickness. The machine configuration cannot be determined from rated power alone.

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How Does the Diffusion Welding Process Work?

Surface Preparation

Oil, moisture and surface contamination are removed from the aluminium foils. The preparation method must be confirmed according to the aluminium grade and the required joint quality.

Foil Stacking and Positioning

The aluminium foils are stacked according to the product drawing and aligned inside the dedicated tooling. Uneven stacking can affect terminal thickness and pressure distribution.

Pressure Application

Pneumatic, pneumatic-hydraulic, hydraulic or servo pressure is applied across the bonding area. The selected pressure system depends on the foil stack, terminal width and required forming force.

Controlled Heating and Holding

The bonding area is heated under controlled pressure. Temperature, heating time and holding conditions are determined through the workpiece structure and sample testing.

Cooling and Inspection

The terminal remains compressed during cooling. After unloading, the customer can inspect its dimensions, appearance, electrical resistance and mechanical performance according to the agreed acceptance criteria.

Aluminium Diffusion Welder Models and Configurations

Aluminium foil stacks and busbar terminals vary in width, thickness, layer structure and required finished dimensions. These differences affect the required heating capacity, pressure system, tooling structure and cooling arrangement.

The rated kVA should not be used as the only basis for selecting a machine. Two components with the same bonding area may require different configurations if their aluminium grade, individual layer thickness or joint structure is different.

Configuration	Suitable project direction	Main selection considerations
Pneumatic	Smaller aluminium foil stacks and limited bonding areas	Available air pressure, required force and joint dimensions
Pneumatic-hydraulic	Medium-size foil terminals and flexible connectors	Force range, stroke, holding time and cycle requirement
Hydraulic	Wider bonding areas, thicker stacks and larger busbars	Pressure distribution, tooling rigidity and cooling stability
Servo-controlled	Components requiring programmable movement or closer dimensional control	Force or displacement monitoring, recipes and process records
Customized system	Automatic loading, multi-station operation or production-line integration	Output, material handling, inspection and factory interfaces

This table provides an initial selection direction. The final configuration should be confirmed from the actual workpiece, sample results and acceptance criteria.

Specifications of Aluminium Diffusion Welder

Items / Model	Unit	HFTD-100-QY	HFTD-200-Y
Rated capacity	KVA	100	200
Power supply	V/Ø/Hz	380V±10% / 3 phases / 50Hz
Rated duty cycle	%	50%	50%
Primary current Max.	A	100	200
Primary cable	mm2	335+216	350+216
Short-circuit current Max.	KA	80	160
Secondary voltage	V	21	21
Air pressure cylinder	Ø*L	Ø100*80	/
Hydraulic cylinder	Ø*L	/	Ø100*100
Working pressure Max. (0.5/10.5MPa)	KN	50	100
Cooling water demand	/	0.2～0.3MPa,40 micron filtration, Resistivity of 5 kΩ. cm
Cooling water consumption	L/Min	100	150
Throat depth	mm	270	270
Distance between copper plates	mm	180	180
Working environment	mm	Temperature: 1～45℃ humidity: 35～90％

Functions of Aluminium Diffusion Welder

1. The diffusion welder is controlled by the man-machine interface microcomputer, and the welding specification program can be programmed and stored.
2. The welder has functions of grinding alarm, welding voltage real-time monitoring display, welding count, welding current over-limit alarm.
3. The welding controller has the function of fault self-diagnosis, welding voltage abnormal alarm, which reduces repair time.
4. There are a few options for pressurized power, pneumatic, pneumatic plus hydraulic, hydraulic, or servo motor..
5. Infrared temperature detection, real-time monitoring of welding temperature.
6. Water cycle cooling saves water cost.

Applications of Aluminium Diffusion Welding

EV and Battery Busbars

Used to consolidate laminated aluminium foil terminals for battery packs, power distribution units and electrical connections.

Energy Storage Connectors

Suitable for flexible aluminium conductors used in battery cabinets, energy storage modules and power conversion equipment.

Electrical Switchgear

Used for laminated busbars and flexible conductive connections where terminal dimensions and electrical performance must be controlled.

Power Distribution Equipment

Applicable to customised aluminium busbars, foil connectors and aluminium-to-copper conductor structures subject to sample evaluation.

Operation Precautions of Aluminium Diffusion Welder

Remove oil, grease, and water vapor using an organic solvent such as acetone or a mild alkaline solution like a strong soap. You may also use citrus-based degreasers, but be sure to rinse and dry the part before welding.
Remove surface oxides with a stainless steel wire brush (used only for aluminum) or strong alkaline or acid. Many welding suppliers sell oxide-removal solutions in spray or squeeze bottles for local application. Exercise extreme care when handling these solutions, and again, rinse and dry the part before welding.
Assemble the joint. If it won't be welded immediately, cover the joint with brown Kraft paper to prevent dirt and grit in the air from getting into the joint.
Keep the aluminum dry and at room temperature.
Weld within a few days. Clean the joint again if it isn't welded within that time.

How to Choose the Right Aluminium Diffusion Welder

Pneumatic, Hydraulic or Servo Pressure Selection

Pneumatic Systems for Smaller Aluminium Parts	Pneumatic pressure may be suitable for smaller foil stacks and limited bonding areas where the required force is within the available range. The decision should not be based only on the physical size of the component. A small workpiece with a wide terminal or high consolidation requirement may still need a higher-force configuration.
Pneumatic-Hydraulic Systems for Medium-Size Connectors	A pneumatic-hydraulic booster uses the factory air supply to generate hydraulic output. This configuration may be considered for medium-size aluminium connectors requiring more force than a standard pneumatic cylinder can provide. The available air pressure, required stroke, holding time and production cycle must be confirmed before selection.
Hydraulic Systems for Wider Bonding Areas	Hydraulic pressure is generally considered for thicker aluminium stacks, wider bonding areas and components requiring higher or more stable force during heating and cooling. Uniform pressure is important across the complete joint. Hydraulic force alone cannot compensate for poor foil alignment, uneven tooling or unsuitable surface preparation.
Servo-Controlled Systems for Process Monitoring	A servo-controlled system may be considered when the project requires programmable movement, force or displacement monitoring, multiple product recipes or integration with an automatic line. Available monitoring and recording functions depend on the agreed equipment configuration. Required data fields and interfaces should be defined during the technical review.

Why Choose Our Aluminium Diffusion Welder

With extensive experience in diffusion welding and resistance welding equipment manufacturing, we design our machines specifically around the oxidation behavior and thermal characteristics of aluminum materials. Our solutions deliver stable performance, repeatable results, and scalable production capability, supporting customers from process validation to mass production.

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FAQ

Q: What Is an Aluminium Diffusion Welder?

A: An aluminium diffusion welder is a specialized welding machine that joins aluminum materials through heat and pressure without filler metal. It is widely used for aluminum busbar welding, battery connector manufacturing, and high-conductivity electrical components.

Q: What Materials Can an Aluminium Diffusion Welding Machine Weld?

A: An aluminium diffusion welding machine can weld aluminum busbars, aluminum foils, laminated conductors, battery tabs, and other conductive aluminum parts. It can also be customized for aluminum-to-copper diffusion bonding applications.

Q: Is Aluminium Diffusion Welding Suitable for Battery Busbars?

A: Yes. Aluminium diffusion welding is widely used for EV battery busbars, energy storage busbars, and power distribution connectors. The process creates strong joints with low electrical resistance and excellent conductivity.

Q: Can an Aluminium Diffusion Welder Join Multiple Layers of Aluminum Foil?

A: Yes. An aluminium foil diffusion welding machine can bond multiple layers of aluminum foil into a solid conductive connection. This process is commonly used in flexible connectors, battery packs, and electrical power systems.

Q: What Are the Advantages of Aluminum Busbar Diffusion Welding?

A: Aluminum busbar diffusion welding provides high joint strength, low contact resistance, and stable electrical performance. It eliminates filler materials and helps maintain the conductivity required for battery and power distribution applications.

Q: Can Diffusion Welding Join Aluminum and Copper?

A: Yes. A customized aluminum-to-copper diffusion welding machine can create reliable metallurgical bonds between aluminum and copper conductors. This solution is often used in battery systems, electrical equipment, and power electronics.

Q: What Industries Use Aluminium Diffusion Welding Machines?

A: Aluminium diffusion welding machines are commonly used in electric vehicle manufacturing, battery production, energy storage systems, power transmission equipment, electrical switchgear, and renewable energy applications.

Q: What Is the Difference Between Aluminium Diffusion Welding and Resistance Welding?

A: Aluminium diffusion welding forms a metallurgical bond through controlled heat and pressure, while resistance welding relies on electrical current to create the joint. Diffusion welding is often preferred for high-conductivity aluminum busbars and laminated conductors.

Q: Does Aluminium Diffusion Welding Melt the Foils?

A: The process is designed to consolidate aluminium foil layers under controlled heat and pressure without bulk melting of the workpiece. The actual temperature and holding conditions must be confirmed through the material, foil structure and sample-testing requirements.

Wuxi Haifei Intelligent Equipment Co., Limited is well-known as one of the leading aluminium diffusion welder manufacturers and suppliers in China. Please rest assured to buy high quality aluminium diffusion welder made in China here from our factory. For price consultation, contact us.

aluminium diffusion welder