Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Your message must
be between 20-3,000 characters!
Submit Requirement
Thank You！
Your requirement has been sent. we will contact you quickly!
{"title":"CNC Machined C11000 ETP Copper Busbar Link with Ra 0.8 Surface Finish and Tin","imgUrl":"https:\/\/img.chinax.com\/nimg\/8d\/fd\/6842f895793152205c27de225943-200x200-1\/cnc_machined_c11000_etp_copper_busbar_link_with_ra_0_8_surface_finish_and_tin.jpg","attrs":{"Surface Finish":"Ra 0.8 or better","Material":"C11000 ETP copper, 99.9% Cu","Plating Thickness":"Tin plating (5-10\u03bcm), silver plating (3-5\u03bcm)","Hole Position Tolerance":"+\/-0.05mm"}}
{"title":"Precision CNC Machined Aluminum Parts for Industrial Equipment","imgUrl":"https:\/\/img.chinax.com\/nimg\/51\/0c\/9afaf4513ec83c45d971d3e4b982-200x200-1\/precision_cnc_machined_aluminum_parts_for_industrial_equipment.jpg","attrs":{"Brand Name":"OEM ODM","Certification":"ISO 9001,IATF16949,ISO14001,SA8000","Place of Origin":"CHINA","Minimum Order Quantity":"1pcs"}}
{"title":"Precision CNC Machined Stainless Steel Parts for Industrial Use","imgUrl":"https:\/\/img.chinax.com\/nimg\/cc\/f9\/33380791b077aa5c868462f341f5-200x200-1\/precision_cnc_machined_stainless_steel_parts_for_industrial_use.jpg","attrs":{"Place of Origin":"CHINA","Certification":"ISO9001","Minimum Order Quantity":"100pcs","Price":"0.1-3"}}
{"title":"Customized Motorcycle CNC Parts SS Aluminum Copper CNC Machining Mechanical","imgUrl":"https:\/\/img.chinax.com\/nimg\/36\/46\/139cdb572520c9751e168b61a8d0-200x200-1\/customized_motorcycle_cnc_parts_ss_aluminum_copper_cnc_machining_mechanical_parts.jpg","attrs":{"Brand Name":"OEM","Certification":"ISO9001","Place of Origin":"CHINA","Minimum Order Quantity":"100pcs"}}
{"title":"Aluminum 6061 6063 7075 CNC Machining Parts Anodized Custom Mechanical Parts","imgUrl":"https:\/\/img.chinax.com\/nimg\/05\/1e\/9ee3be14b97ce2c886a732f5354f-200x200-1\/aluminum_6061_6063_7075_cnc_machining_parts_anodized_custom_mechanical_parts.jpg","attrs":{"Brand Name":"OEM","Certification":"ISO9001","Place of Origin":"CHINA","Minimum Order Quantity":"100pcs"}}
{"title":"OEM 3 4 5 Axis CNC Mechanical Parts Anodized Plating For Medical Instruments","imgUrl":"https:\/\/img.chinax.com\/nimg\/7c\/8b\/96d9d768eb2350c28c4aaba9ccec-200x200-1\/oem_3_4_5_axis_cnc_mechanical_parts_anodized_plating_for_medical_instruments.jpg","attrs":{"Brand Name":"OEM","Certification":"ISO9001","Place of Origin":"CHINA","Minimum Order Quantity":"100pcs"}}
{"title":"Custom Metal CNC Mechanical Parts Precision CNC Machining Service ISO9001","imgUrl":"https:\/\/img.chinax.com\/nimg\/f0\/35\/a266ac05c78771c5630130006bb0-200x200-1\/custom_metal_cnc_mechanical_parts_precision_cnc_machining_service_iso9001_approved.jpg","attrs":{"Brand Name":"OEM","Certification":"ISO9001\uff0c IATF16949","Place of Origin":"CHINA","Minimum Order Quantity":"100pcs"}}
CNC Machined Copper C11000 Busbar Link for Energy Storage System
Product Overview
Think of the busbar link as the highway between your battery cells and your inverter. Everything flows through it — hundreds of amps, thousands of cycles, 10+ years of service. And if there's a weak point in that path, it's not a question of if it fails, but when.
Copper C11000 ETP (Electrolytic Tough Pitch) is the standard for a reason. IACS conductivity rating of 101% — you literally can't do better with a commercially available copper alloy. But here's the thing most people miss: conductivity depends on more than the material grade. A poorly machined contact surface with tool marks and burrs creates high-resistance spots. Those spots heat up. Heat increases resistance. More resistance means more heat. It's a feedback loop that ends in a thermal runaway or at minimum a degraded connection that throws off your cell balancing.
We machine busbar links with contact surfaces at Ra 0.8 or better. Not because it looks nice — because it ensures uniform current distribution across the entire contact area. When you're pushing 400A through a connection, every square millimeter of contact matters.
The design of a busbar link isn't complicated — it's a flat copper conductor with holes, bends, and maybe some plated surfaces. But the tolerances matter. Hole position controls whether your assembly goes together smoothly. Bend radius controls whether you've got stress concentrations that will crack under thermal cycling. Plating thickness controls whether your contact resistance stays stable over years of operation.
For BESS applications, we typically see tin-plated C11000. The tin prevents oxidation of the contact surfaces and keeps connection resistance low and stable. Silver plating is an upgrade for higher-current applications, but most 50-500kWh systems don't need it — and tin is a lot cheaper.
Key Features
Contact Surface Finish: Ra 0.8 or better on all current-carrying surfaces — measured and verified with profilometer
Material: C11000 ETP copper with minimum 99.9% Cu content, full conductivity certification provided
Plating Options: Tin plating (5-10μm standard), silver plating (3-5μm), or nickel barrier + tin for harsh environments
Bend Precision: Custom bending with controlled radius to prevent stress cracking at high-current bend points
Hole Accuracy: +/-0.05mm positional tolerance on all mounting and connection holes
Current Rating: Supports 200A to 1000A+ depending on cross-section — we'll verify your design against your current requirements
Tin plating, silver plating, nickel+tin duplex, or bare copper
Certifications
ISO 9001:2015, IATF 16949, RoHS, CE, REACH
Conductivity
≥101% IACS (C11000), ≥101% IACS (C10200)
Lead Time - Prototype
3-7 days
Lead Time - Production
7-15 days (100-500 pcs), 15-25 days (500+ pcs)
MOQ
1 piece (prototype), 50+ (production)
Origin
Dongguan, China
Applications
BESS Inter-Module Connection: Busbar links connecting cell modules within battery cabinets, handling 200-600A continuous current
Inverter Connection: Heavy-duty busbar links from battery racks to PCS (Power Conversion System) terminals
EV Battery Pack Interconnect: Internal busbar connections for electric vehicle battery modules
Solar Inverter Busbar: DC busbar links between solar panel arrays and inverter systems
UPS Power Distribution: Busbar links in high-capacity uninterruptible power supply systems
Industrial Switchgear: Custom copper busbar assemblies for power distribution panels
Why Choose Sinbo Precision
Contact Surface Quality: We don't just machine flat — we verify surface finish with profilometer readings. Your assembly torque will be consistent because the contact surfaces are consistent
Plating Management: We coordinate plating through vetted vendors and verify thickness with XRF testing. No guessing whether you got 5μm or 2μm of tin
Bend Quality Control: We check bend radius with gauges and inspect for cracking with magnification. A cracked bend in a 400A busbar is not something you want to discover after installation
Volume Consistency: Whether you need 50 or 5000, every piece gets the same contact finish, the same hole positions, the same plating thickness
Material Traceability: Full MTR with conductivity certification on every lot. We don't substitute materials without telling you
Manufacturing Process
Design Review: We check your busbar design for bend radius adequacy, current-carrying cross-section, and assembly clearances. If your bend radius is tighter than 2x material thickness, we'll flag it
Material Selection: C11000 ETP copper strip or plate from certified mills. Conductivity test on incoming material
Precision Machining: CNC milling for hole patterns and profiling, CNC bending for form features. Deburring is critical — no burrs on current-carrying surfaces
Surface Finishing: Contact surfaces finished to Ra 0.8 or better. All edges chamfered or radiused per your spec
Plating: Tin, silver, or duplex plating per specification. XRF thickness verification on every plating lot
Q: What's the difference between C11000 and C10200 for busbar applications?
A: C11000 ETP is 99.9% Cu with trace oxygen — fine for most BESS applications. C10200 OFHC is oxygen-free and marginally better conductivity. For 99% of energy storage busbars, C11000 is the right choice. You pay 15-20% more for OFHC with negligible performance benefit.
Q: Tin or silver plating — which do I need?
A: Tin for standard BESS applications up to 400A per connection. Silver if you're pushing higher currents or need lower contact resistance in a compact space. Most of our customers use tin and it works fine.
Q: Can you machine busbar links with multiple bends in 3D?
A: Yes. We handle 2-bend and 3-bend configurations. Complex 3D shapes may require custom tooling — we'll quote it upfront.
Q: What's the maximum cross-section you can handle?
A: Up to 12mm thick, 200mm wide. Thicker than that and you're looking at fabrication rather than machining — we can refer you to a qualified partner.
Q: How do you prevent tarnishing during storage and shipping?
A: Anti-tarnish paper wrapping, sealed bags with desiccant, and climate-controlled storage. For unplated copper, we recommend assembly within 30 days of receipt.
Q: Do you provide electrical testing?
A: We can provide conductivity verification on raw material. For finished busbar links, we verify dimensions and surface finish. Full electrical testing (contact resistance, current capacity) is typically done at your system integration facility.
