The LAVACELL Series offers modular, adaptable laser welding platforms designed for battery module assembly. Whether you require automated welding of copper bus bars, battery tabs, or cell holders, LAVACELL systems deliver: vacuum-tight chamber design for inert gas welding; in-house developed process optics and clamping technology; modular design for flexible cell formats (pouch, cylindrical, prismatic); and integration of cleaning, welding, and inspection modules into a single coordinated production workflow.

Core System Components

• High-Peak-Power Fibre Laser Source with Ultrafast Pulse Shaping: delivers the controlled energy density required for reliable copper and aluminium welding
• Vacuum-Tight Welding Chamber: enables inert gas welding environments for oxidation-free, contamination-protected weld quality
• In-House Developed Process Optics: beam delivery and focusing optics engineered specifically for the reflective, high-thermal-conductivity materials common in battery applications
• Custom Clamping Technology: precisely secures cell tabs, bus bars, and terminals at the weld point without introducing mechanical stress on delicate battery components
• Modular Cell Format Tooling: configurable fixturing supporting pouch, cylindrical (18650, 21700, 4680), and prismatic cell formats within the same platform architecture
• Integrated Cleaning Module: prepares weld surfaces before joining to ensure consistent, contamination-free weld quality
• Vision-Assisted Weld Positioning System: ensures accurate weld placement on small, precisely positioned battery interconnect features
• Melt Pool Monitoring and Inline Inspection: provides real-time process quality verification and complete weld traceability logging for every weld cycle

Please contact us for the technical details : sales@unitedspectrum.in

Copper and Aluminium Welding

The LAVACELL machines excel at laser welding copper and laser welding copper aluminium combinations — historically challenging due to their reflectivity and thermal conductivity. The use of high-peak power fibre lasers with ultrafast pulse shaping ensures: low-porosity welds; high conductivity joints; and no mechanical stress or electrode damage. This capability directly addresses the materials science challenge at the heart of battery interconnect manufacturing, where joint electrical resistance and mechanical reliability are both safety-critical and performance-critical parameters.

Copper Bus Bar Laser Welding

With built-in optical monitoring and adaptive beam shaping, the LAVACELL series enables high-quality copper bus bar laser welding, essential for high-voltage EV battery packs and power distribution systems. Bus bar welding quality directly affects the current-carrying capacity, heat generation, and long-term reliability of the high-voltage interconnects that distribute power throughout an EV battery pack — making weld quality a direct safety and performance parameter rather than a cosmetic consideration.

Lithium-Ion Battery Laser Welding

The machine’s precise clamping, real-time weld depth monitoring, and cooling systems make it ideal for lithium-ion battery laser welding, including: tab-to-bus bar connections; cell terminal welding; and interconnect welding in compact modules. The precision clamping and controlled, minimal heat input of the LAVACELL process protect the chemically and thermally sensitive internal structure of lithium-ion cells during the welding process — critical for cell safety and longevity in service.

Flexible Fixturing

Tooling is customisable for different cell types and module sizes. Pouch, cylindrical (18650, 21700, 4680), and prismatic cells are all supported. This ensures scalability and modularity in your battery production line. As battery cell format standards continue to evolve — with 4680 cylindrical cells representing a recent industry shift toward larger-format cells for improved energy density and reduced interconnect count — the LAVACELL platform’s flexible fixturing protects the manufacturer’s capital investment against future format transitions.

Process Monitoring and Traceability

LAVACELL includes inline quality assurance features such as: vision-assisted weld positioning; melt pool monitoring; and process logging and traceability for every weld. For EV battery manufacturers, this weld-by-weld traceability record supports both internal quality management and the increasingly stringent battery safety and recall traceability requirements emerging in automotive and energy storage regulatory frameworks globally and within India’s developing EV battery safety standards.

Automotive Industry — Electric Vehicles (EVs) and Hybrids

Laser welding plays a critical role in the fabrication of EV battery packs, where electrical integrity, thermal stability, and high-throughput manufacturing are required:

• Copper bus bar laser welding: high-voltage interconnect welding for EV battery pack power distribution, supporting India’s rapidly scaling EV manufacturing sector including Tata Motors, Ola Electric, and emerging battery pack integrators
• Battery tab welding (Cu-Al, Cu-Ni): precision dissimilar metal welding for cell tab connections, where the LAVACELL platform’s pulse-shaped fibre laser technology manages the differing material properties of these common battery interconnect combinations
• Cell terminal welding (18650/21700/4680 cells): precision terminal welding across the full range of cylindrical cell formats used in current and next-generation EV battery designs
• Safety fuse welding: precision welding of battery safety fuse and protection device interconnects, critical for EV battery pack thermal runaway protection systems

Energy Storage Systems (ESS) and Battery Modules

In stationary and grid-connected storage systems, long service life and high-power delivery are crucial. Laser welding enables the fabrication of low-resistance joints and multi-cell interconnects with minimal thermal impact:

• Aluminium bus bar welding: low-resistance, high-current-capacity bus bar interconnects for grid-scale and commercial energy storage system installations, relevant to India’s expanding renewable energy storage infrastructure
• Interconnect welding: multi-cell module interconnection for large-format stationary battery systems, where weld consistency across hundreds or thousands of cell connections directly affects system reliability and service life
• Laser welding copper aluminium: dissimilar metal joining for ESS module designs incorporating both copper and aluminium components, a common configuration in grid storage battery architecture

Portable Electronics and Consumer Battery Packs

Compact battery packs in smartphones, laptops, and IoT devices demand ultra-clean welds in confined spaces. Laser welding excels due to its non-contact nature and low HAZ (heat-affected zone):

• Nickel-to-aluminium/copper tab welding: precision micro-welding of the fine interconnect tabs used in consumer electronics battery packs, supporting India’s expanding electronics manufacturing sector under the PLI scheme
• Micro-bus bar welding: fine-scale bus bar interconnect welding for compact consumer battery module designs
• Shielding can sealing: hermetic sealing welds on battery cell shielding cans, protecting cell internals from environmental contamination in portable device applications

Aerospace and Defence Battery Systems

Aerospace-grade batteries require extreme reliability, low weight, and stable performance in fluctuating temperatures. Laser welding supports the production of ruggedised, hermetically sealed battery modules:

• Prismatic cell bus welding: precision interconnect welding for prismatic cell battery modules used in aerospace and defence applications, supporting HAL, DRDO, and India’s expanding aerospace and defence electronics manufacturing sector
• Internal cell interconnections: high-reliability interconnect welding within battery modules designed for the extreme reliability requirements of aerospace and defence applications
• Laser welding copper with aluminium connectors: dissimilar metal joining for aerospace battery system designs requiring both high conductivity and weight-optimised material selection

Medical Devices and Diagnostics

Medical and implantable devices often utilise micro-battery packs requiring zero contamination, precision welds, and biocompatible processing:

• Micro-lithium battery welding: precision welding of miniaturised lithium battery interconnects for implantable and portable medical device power supplies, relevant to Indian medical device manufacturers pursuing CDSCO registration and export market regulatory compliance
• Hermetic laser seam welding: contamination-free, hermetically sealed welds for medical device battery enclosures, where the vacuum-tight chamber capability of the LAVACELL platform supports the strictest contamination control requirements
• Fine interconnect welding: precision micro-welding for the fine-scale interconnects common in implantable and wearable medical device battery systems

United Spectrum Instruments is the official distributor of Lava X GmbH in India, bringing the LAVACELL Series of battery pack laser welding machines — engineered in Germany specifically for the demanding requirements of EV and energy storage battery manufacturing — to Indian manufacturers, supported locally with installation, training, and technical integration.

Decades of Expertise in Laser Technologies

United Spectrum Instruments brings decades of expertise in laser technologies, drawing on the company’s broader portfolio of precision laser system distribution to inform application consultation for battery interconnect welding — a specialised application requiring deep understanding of the reflectivity, thermal conductivity, and cell-sensitivity challenges unique to battery manufacturing.

Dedicated Sales and Service Support in India

Dedicated sales and service support in India ensures customers in the rapidly scaling Indian EV and battery manufacturing sector receive prompt, India-based technical consultation, installation support, and ongoing service — critical for production-critical battery manufacturing lines where equipment downtime has direct production impact.