Welding for the Electrification of Automobiles and Aircraft

Electrification is changing how vehicles and aircraft are designed, manufactured, and maintained. Batteries, power electronics, sensors, cooling systems, lightweight structures, and high-conductivity components are becoming central to performance.

As these systems evolve, welding becomes more than a fabrication step. It becomes a critical engineering decision.

Automotive and aerospace electrification often requires joining thin materials, conductive metals, dissimilar alloys, and compact assemblies where heat input must be tightly controlled. Laser welding and electron beam welding are especially valuable in these environments because they offer precision, repeatability, and strong control over the weld zone.

Electrified automobiles and aircraft place new demands on welded components. Engineers must balance conductivity, strength, weight, thermal performance, and reliability.

Common challenges include:

• Conductive metals: copper and aluminum are common in electrical and thermal systems, but both can be difficult to weld.
• Dissimilar materials: Electrified platforms often combine materials to optimize weight, conductivity, corrosion resistance, or heat transfer.
• Thermal management: Batteries, power electronics, and high-performance computing systems generate heat that must be managed reliably.
• Lightweighting: Aircraft and electric vehicles both benefit from lighter assemblies without sacrificing strength.
• Repeatability: High-volume automotive programs and aerospace qualification requirements both demand consistent weld quality.

EB Industries’ dissimilar metals research notes that joining dissimilar materials can introduce challenges such as thermal expansion mismatch, melting point differences, contamination risk, brittle intermetallic compounds, and uneven mechanical properties.

Laser welding is a strong fit for many electrification applications because it provides speed, precision, and low heat input. It can be performed without a vacuum chamber, which can simplify production setup for certain parts.

In automotive electrification, laser welding can support components such as:

• Battery assemblies
• Thin-walled battery components
• Current-carrying connections
• Sensor housings
• Thermal management assemblies
• Lightweight metal housings and frames

EB Industries identifies battery assemblies, including disks to covers and capacitors, among its laser welding applications.

Laser welding can also support selected dissimilar-metal applications. For example, EB Industries’ dissimilar metals white paper identifies copper-to-nickel welds for thin-walled battery components in electric vehicles, where both conductivity and strength are required.

White Paper Welding Dissimilar Metals: Overcoming Challenges with Advanced Electron Beam and Laser Techniques Download White Paper

While laser welding is often attractive for speed and flexibility, electron beam welding can be the better choice when deeper penetration, low distortion, and weld purity are the top priorities.

Electron beam welding takes place under vacuum, which helps eliminate oxides and nitrides from the weld zone. EB welding can achieve weld depths up to 2 inches, provides a small heat-affected zone with a high depth-to-width ratio, and is well suited for refractory and dissimilar metals that can be difficult to weld conventionally.

For electrified aircraft and high-performance automotive systems, EB welding may be useful for:

• Cooling plates
• Heat exchangers
• High-strength structural subassemblies
• Sensor and valve components
• Thermal management hardware
• Dissimilar-metal joints requiring high reliability

EB Industries lists cooling plates, heat exchangers, sensors, valves, alternative energy components, and aerospace applications among its electron beam welding work.

Aircraft electrification includes more-electric aircraft systems, hybrid-electric propulsion development, battery-assisted systems, power distribution hardware, and advanced thermal management. These aerospace systems require lightweight, reliable components that can withstand vibration, temperature cycling, and demanding operating environments.

Welding applications may include:

• Battery and power electronics enclosures
• Heat exchangers and cooling plates
• Sensor housings
• Fuel, hydraulic, or thermal system components
• High-reliability electrical packages
• Lightweight structural or support assemblies

Laser welding is commonly used in aerospace for turbine blades, fuselage sections, engine parts, sensors, and similar assemblies.

For components exposed to high loads, high temperatures, or demanding qualification requirements, the welding process must be selected based on more than speed alone. Engineers should evaluate penetration, distortion, material compatibility, inspection requirements, and long-term reliability.

Thermal management is one of the largest engineering challenges in electrified vehicles and aircraft. Batteries and power electronics must operate within defined temperature ranges to maintain performance and safety. Cooling plates, heat exchangers, and thermal housings often rely on leak-tight, repeatable welds.

Both laser and electron beam welding can play a role:

• Laser welding is useful for precise, fast welds on thinner assemblies and production parts.
• Electron beam welding is useful when deep penetration, vacuum cleanliness, and low distortion are critical.
• Laser hermetic sealing may be used when sensitive electronics need protection from moisture and contaminants.

For parts involving thin materials, compact geometries, or heat-sensitive features, pulsed laser modes can help control heat input and reduce the risk of damaging nearby components.

There is no single best welding process for electrification. The right choice depends on the part design, material combination, performance requirements, and production goals.

Laser welding may be preferred when:

• The part is thin or miniature
• Speed and throughput are important
• A vacuum chamber is not practical
• Heat input must be tightly controlled
• The weld length or geometry favors laser access

Electron beam welding may be preferred when:

• Deep penetration is required
• Weld purity is critical
• Distortion must be minimized
• The material combination is difficult
• The part fits within the vacuum chamber
• The application requires high structural integrity

TIG welding may still be useful for certain large, hand-fit, or lower-volume assemblies, especially where filler metal is needed to bridge gaps. However, TIG welding may not provide the same speed, precision, or low heat input as laser or electron beam welding for many electrification components.

White Paper Electron Beam vs Laser Welding Download White Paper

Electrification programs often move quickly, but welding should not be left until late in the design cycle. Early weldability review can help identify issues with joint design, material selection, tolerance stack-up, distortion, and inspection access before production tooling is locked in.

For automotive and aircraft electrification, early collaboration can help answer questions such as:

• Can the selected materials be joined reliably?
• Is laser welding or EB welding better for this geometry?
• Will the weld meet strength, leak-tightness, or conductivity requirements?
• How much heat input can nearby components tolerate?
• Can the process scale from prototype to production?
• What inspection methods should be planned?

EB Industries supports demanding aerospace, medical, energy, electronics, semiconductor, and battery applications with electron beam welding, laser welding, laser hermetic sealing, and related manufacturing expertise.

As automobiles and aircraft become more electrified, welding requirements will become more complex. Components will need to be lighter, smaller, more conductive, more thermally efficient, and more reliable.

Laser welding and electron beam welding give engineers more options to meet those demands. From EV battery assemblies to aircraft thermal management systems, advanced welding can help manufacturers improve performance while supporting repeatability and long-term reliability.

Which welding process is best for EV battery components?

Laser welding is often the best fit for battery assemblies, thin-walled components, and current-carrying connections because it offers speed, precision, and low heat input and does not require a vacuum chamber. Electron beam welding is preferred when deeper penetration, weld purity, or low distortion are the priority.

Can laser or electron beam welding join copper and aluminum for electrified systems?

Yes. Copper and aluminum are common in electrical and thermal systems and can both be difficult to weld. Laser and electron beam welding manage these materials through tightly controlled heat input and small heat-affected zones, and both can support selected dissimilar-metal joints such as copper to nickel for battery components.

What welding applications are common in aircraft electrification?

Battery and power electronics enclosures, heat exchangers and cooling plates, sensor housings, fuel/hydraulic/thermal system components, high-reliability electrical packages, and lightweight structural or support assemblies.

How is heat managed when welding near batteries and electronics?

Pulsed laser modes help limit heat input near heat-sensitive features, electron beam welding provides a small heat-affected zone under vacuum, and laser hermetic sealing protects sensitive electronics from moisture and contaminants.

Developing components for electric vehicles, hybrid-electric aircraft, or advanced thermal systems? Contact EB Industries to review your welding requirements and identify the best process for your application, or request a quote.