Bus Bars — Low-Resistance Joints, Per Lot
Busbars are flat conductive strips used to distribute electrical power within battery packs, power distribution units, inverters and charging infrastructure.
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Performance
EV-GRADE BUSBAR PRECISION
Busbar performance depends on cross-section consistency, flatness and plating quality. Our EV-specific tooling holds ±0.01 mm precision, and our qualified plating lines deliver uniform tin or nickel finishes that maintain low contact resistance over the product's lifetime.
Stamped copper busbars offer a cost-effective, high-volume alternative to machined or formed busbars - with tight flatness and burr control for reliable high-current performance.
ISTAMPING specializes in EV busbar solutions: stamped and formed copper busbars with managed tin or nickel plating, and optional insert molding for complete busbar assemblies.
Materials
Common Materials
- C1100 / C10200 Copper
- C70250 (Corson) High-Performance Alloy
- C19900 Titanium Copper
- C5191 Phosphor Bronze
Specifications
Technical Specifications
Material thickness
0.05 – 3.0 mm
Positioning precision
±0.005 mm
Flatness
≤ 0.03 mm
Plating
Tin / Silver / Nickel (managed)
Press capacity
25 – 80 tons (high-speed)
Max strip width
Up to 650 mm
Spec Matrix
Busbar Stamping Specifications at a Glance
Stock gauge, strip width and plating routes we run for stamped busbars — current-carrying cross-section is confirmed in DFM review against your current rating and enclosure, not from a generic ampacity chart.
| Material | Stock thickness | Max strip width | Plating / finish (managed) |
|---|---|---|---|
| C1100 / C10200 copper | 0.05 - 3.0 mm | up to 650 mm | Tin / Silver / Nickel, reel-to-reel |
| Aluminum 1050 / 5052 / 6061 | 0.10 - 3.0 mm | up to 650 mm | Anodizing & corrosion-protected finishes |
| C70250 / C19900 high-conductivity alloys | 0.05 - 3.0 mm | up to 650 mm | Tin / Nickel, selective contact zones |
| Laminated copper stacks | 0.05 - 3.0 mm per laminate | up to 650 mm per laminate | Tin-plated contact faces, welded or riveted stack |
Product Range
Types of Bus Bars We Produce
The form factors below are the ones we run most often on coil-fed progressive dies — tell us yours if it is not listed.
QUALITY ASSURANCE & INSPECTION
Rigorous Precision Inspection & Quality Control Standards
Inspection HardwareHigh-Precision Testing Equipment
- ZEISS CMM for complex 3D contours
- Nikon optical projector & tool presetters (0.001 mm resolution)
- Vickers hardness testers & surface roughness gauge
Quality StandardsInspection Built Into Every Run
- 100% critical dimension inspection before packaging & shipment
- Concentricity & runout verification under optical magnifiers
- Surface micro-scratch & polish quality double-check
Material ComplianceFull Material & Heat Treatment Traceability
- Spectrometer material composition analysis report provided
- Original Mill Test Certificate (MTC) & heat treatment logs
- RoHS & REACH environmental compliance statements
Talk to Our Engineers About Quality Documentation
Tell us what your project requires, and our team confirms which inspection and material documentation can be included with your quote.
Manufacturing Process
How We Manufacture Bus Bars
From drawing review to delivered parts — die design, stamping, plating and inspection records all owned in-house.
Design & Engineering
We engineer busbar cross-section, bend sequence and contact zones from your 3D model to ensure consistent current capacity and fit in the assembly.
Progressive Die Stamping
Busbars are stamped on high-speed progressive presses holding ±0.005 mm precision, with strip integrity maintained across long production runs.
Multi-Axis Forming
Bends, offsets and twist forms are produced with springback-compensated tooling so each busbar fits without stress - validated by CMM inspection.
In-Die Tapping & Inserts
Threads and inserts are integrated in-die or as secondary operations, reducing part count and assembly labor in battery and power systems.
Managed Plating
Reel-to-reel tin, silver or nickel plating delivers uniform, low-contact-resistance finishes that maintain performance over the product lifetime.
Inspection & Quality Control
Camera vision and CMM verification under IATF 16949:2016 confirm flatness (≤0.03 mm), burr control and plating quality before shipment.
Applications
Where Bus Bars Are Used
Each card opens the industry page for that application — programs, materials and controls by sector.
E-Mobility / Electric Vehicles
EV battery pack cell-to-pack & module busbar connections — The electric vehicle revolution is redefining precision manufacturing.
E-Mobility / Electric Vehicles
Charging infrastructure & on-board charger busbars — The electric vehicle revolution is redefining precision manufacturing.
Electrical
Inverter & power distribution unit (PDU) links — Electrical metal stamping for power distribution - copper and aluminum busbars, silver and nickel plated contacts…
Solar
Energy storage systems (ESS) & grid storage — Solar and energy storage stampings built for decades of outdoor service…
E-Mobility / Electric Vehicles
Hybrid & 48V mild-hybrid power networks — The electric vehicle revolution is redefining precision manufacturing.
Electrical
Industrial power distribution & switchgear — Electrical metal stamping for power distribution - copper and aluminum busbars, silver and nickel plated contacts…
In-House Tool Room
Made in Our Own Tool Room
Every progressive die behind our stamped parts is 100% in-house stamping tooling — design, machining, assembly and T1 trial all under our roof. That is why tooling issues get solved on the shop floor in hours, not by email exchange with an outside die shop.
±0.001 mm Achieved
Combined machining accuracy down to ±0.001 mm, Ra0.05 µm surfaces and Ø0.05 mm micro end mills for tight die features.
30 In-House Machines
30 die-making machines — wire EDM, CNC and precision grinding — keep every die build and repair on our own schedule.
2–5 Weeks for Stamp Dies
Typical stamping die delivery in 2–5 weeks, with T1 trials run on our own presses before you commit to volume.
One Accountable Chain
Self-designed progressive dies, machined in-house, run at 60–300 SPM with CCD inline inspection — no outsourced-die handoff where quality falls between suppliers.
INSIDE THE PLANT
Inside Our Stamping Line
Real equipment and inspection floor from our Dongguan plant — 25–110T high-speed presses, in-house tool room, and a CMM lab running first-article inspection on every program.
Engineering Support
Design-for-Manufacturability Support
Our engineers review your busbar at the quoting stage - cross-section, bend radii, plating zones - and recommend design-for-manufacturability changes that lower tooling cost while preserving current rating and fit. Existing dies can be taken over and optimized for our high-speed presses.
FAQ
Questions Buyers Ask
Straight answers on materials, plating, supply format, quality and timing — send your drawing for anything specific.
What materials are EV busbars made from?
We stamp C1100/C10200 copper, high-performance alloys such as C70250 (Corson) and C19900 titanium copper, and phosphor bronze - matched to your current and thermal requirements.
Can you manage plating for busbars?
Yes. Reel-to-reel tin, silver or nickel plating runs through our approved partner lines for uniform, low-resistance finishes that withstand EV operating conditions.
What flatness and precision can you hold?
Our EV-specific tooling holds ±0.005 mm positioning precision and ≤0.03 mm flatness, with CMM validation on critical dimensions.
What drawing file formats do you accept?
PDF, STEP, IGES, DWG or DXF — send whatever you have with material, annual volume and target tolerance, and your drawing goes straight to our engineering team for a DFM pass. No finished drawing yet? A photo of the part or a sketch with a few key dimensions is enough to start.
NEXT PROGRAM
Spec Your Next Part Here
Sibling part families on the same presses, dies and quality system — one RFQ covers the mix.
Terminals
Spec your terminals on ±0.005 mm dies with selective plating right on the contact faces.
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Wire & Cable Connectors
Hold crimp integrity with fine-pitch dies and plated contact faces, reel-packed.
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Assemblies
Consolidate stamping, plating and assembly under one PPAP and one accountable line.
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