Flexible Busbars for EV Battery Packs
High-performance laminated copper busbars engineered for electric vehicle battery systems and stationary energy storage (BESS). Optimized for high current, thermal management, and the demanding vibration and safety requirements of automotive applications.
Key Features
High Current Density
Optimized cross-section design delivers maximum current capacity with minimum weight and volume.
Thermal Management
Laminated construction provides excellent heat dissipation, preventing hotspots in battery systems.
Weight Optimization
Precisely engineered to minimize weight while meeting current and thermal requirements - critical for EV range.
Vibration Resistance
Flexible design withstands automotive vibration and shock without fatigue or loosening.
Compact Design
Low-profile construction fits in tight battery pack spaces where rigid busbars and cables cannot.
Safety Features
Insulation options meet automotive safety standards for high-voltage isolation in 400 V and 800 V systems.
Battery Pack Applications
Prismatic Cell Packs
Flexible connections between prismatic cells in module configurations.
Pouch Cell Packs
Low-profile busbars for connecting pouch cell tabs in series and parallel.
Cylindrical Cell Packs
Interconnects for 18650, 21700, and 4680 cylindrical cell modules.
Module-to-Module
High-current connections between battery modules within the pack.
Common Uses
- Battery module interconnections
- Battery pack main busbars
- BMS (Battery Management System) connections
- Inverter and motor controller connections
- DC fast charging circuits
- High-voltage junction boxes
- Onboard charger connections
- BESS rack and container busbars
Battery Energy Storage Systems (BESS)
The same flexible busbar technology proven in EV packs is increasingly used in stationary battery energy storage - grid-scale containers, commercial and industrial BESS, and solar-plus-storage installations. Flexible busbars connect battery modules to rack busbars and power conversion systems while absorbing thermal cycling across the wide temperature swings of outdoor enclosures.
For BESS applications, SVS Maverick typically supplies tin-plated copper busbars with heat shrink or PVC insulation, sized for continuous charge/discharge duty. Larger cross-sections up to 10,000 A are available for DC bus and PCS connections.
EV-Specific Requirements
Electrical Performance
- Low resistance for minimal power loss
- Low inductance for fast switching
- High current capacity for rapid charging
- Consistent performance across temperature range
Mechanical Requirements
- Vibration resistance (automotive standards)
- Thermal cycling durability
- Compact form factor
- Easy assembly and serviceability
Safety & Compliance
- High-voltage isolation (creepage/clearance)
- Flame retardant materials
- Automotive qualification testing
- Traceability and documentation
Technical Specifications
| Current Rating | 100 A - 2,000 A (continuous) |
| Voltage Class | Up to 1,000 V DC |
| Conductor Material | ETP / OFC Copper |
| Lamination Thickness | 0.1 - 0.2 mm (typical) |
| Operating Temperature | -40°C to +85°C |
| Insulation | Kapton, PET, or Nomex |
| Plating | Nickel or tin (for aluminium welding compatibility) |
| Standards | ISO 6469, IEC 61851, SAE J1772 |
Sizing a busbar for your pack? See our sizing & ampacity guide.
Custom Design Services
Every EV battery pack is unique. Our engineering team works with you from concept to production to develop flexible busbar solutions that meet your exact requirements.
- Design consultation and optimization
- Thermal and electrical analysis
- Prototype development
- Testing and validation support
- Production scaling
EV Busbar FAQ
Why use flexible busbars instead of cables in EV battery packs?
Flexible busbars carry the same current in a thinner, flatter package than round cable, freeing space and reducing weight - both critical for EV range. The flat profile also dissipates heat better, has lower inductance for fast-switching circuits, and the defined shape simplifies automated assembly compared to routing cables.
Why use flexible busbars instead of rigid busbars between battery modules?
Battery modules shift relative to each other from road vibration, thermal cycling, and cell swelling over the pack lifetime. A rigid busbar transmits these forces into the cell terminals, the weakest point in the pack. A flexible busbar absorbs the movement, protecting terminals and welds for the life of the vehicle.
Can flexible busbars connect to aluminium battery terminals?
Yes. Nickel-plated copper busbars are the standard solution for laser or ultrasonic welding to aluminium cell terminals, preventing galvanic corrosion at the copper-aluminium interface. Tin plating is used for bolted aluminium joints.
Are your busbars suitable for stationary energy storage (BESS)?
Yes. The same flexible busbar technology used in EV packs applies to grid-scale and commercial battery energy storage systems - module interconnects, rack busbars, and connections to power conversion systems. BESS designs typically allow larger cross-sections and favor tin plating with heat shrink insulation.
What insulation is used for high-voltage EV busbars?
Kapton (polyimide) film, PET film, and Nomex are the standard insulations for 400 V and 800 V EV systems. They provide high dielectric strength in thin layers, meet flame-retardancy requirements, and maintain creepage and clearance distances in compact packs.
Do you support prototype quantities for EV development?
Yes. SVS Maverick supports EV and battery programs from first prototypes through validation builds to series production, with design consultation, quick-turn samples, and scaling as your program ramps.
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Partner With Us for Your EV Project
From prototype to mass production, we support EV and energy storage manufacturers in India and worldwide with reliable, high-performance flexible busbar solutions. Contact us to discuss your requirements.
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