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CNC Machined C11000 ETP Copper Energy Storage Link with Precision Hole Positioning for 300A Continuous Current in BESS

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CNC Machined C11000 ETP Copper Energy Storage Link with Precision Hole Positioning for 300A Continuous Current in BESS

Detail Information

Product Description

Detail Information

Material:

C11000 ETP Copper, C10200 OFHC Copper

Tolerance:

+/-0.1mm (length, Width), +/-0.05mm (hole-to-hole)

Surface Finish:

Ra 1.6 (contact Faces), Ra 3.2 (non-contact)

Current Rating:

100A - 600A (cross-section Dependent)

Cross-Section:

30mm2 - 200mm2 (application Dependent)

Plating Thickness:

Tin (3-5um), Nickel (3-5um), Silver (2-3um)

Product Description

CNC Machined Copper Energy Storage Link for BESS and Power Distribution

Product Overview

An energy storage link serves as a copper bridge connecting battery modules to busbars, busbars to inverters, or inverters to grid connection points. These flat or L-shaped copper bars feature holes at each end for bolting to adjacent components. Engineered for demanding applications, they must carry 300A continuous current, withstand 500A short-circuit surges for 3 seconds without melting, survive 10 years of daily thermal cycling from 25°C to 65°C, and maintain cost-effectiveness at volume production.

The engineering precision lies in the cross-section calculation. For 300A continuous current in C11000 copper (101% IACS), a minimum cross-sectional area of approximately 70mm² is required to stay within temperature rise limits. We machine these critical components from C11000 ETP copper plate, maintaining dimensional consistency with length tolerances of ±0.1mm, hole position accuracy of ±0.1mm, and contact face flatness within 0.1mm to ensure consistent contact pressure and low resistance across all links in the rack.

Key Features

C11000 ETP Copper: 101% IACS minimum conductivity with virgin copper plate from certified mills, complete with material certificates
Precision Hole Positioning: ±0.1mm on bolt hole centers and ±0.05mm hole-to-hole distance for consistent bolt alignment
Contact Surface Finish: Ra 1.6 or better on bolt-contact faces for low contact resistance (<0.3 milliohm)
Plating Options: Tin plating (3-5μm) for general use, nickel plating (3-5μm) for harsh environments, silver plating (2-3μm) for maximum conductivity, with XRF verification
Custom Shapes: Straight links, L-links, Z-links, U-links and any 2D profile with maximum bending radius 3x material thickness

Technical Specifications

Specification	Details
Product Name	CNC Machined Copper Energy Storage Link
Material Options	C11000 ETP Copper, C10200 OFHC Copper
Tolerance	±0.1mm (length, width), ±0.05mm (hole-to-hole)
Surface Finish	Ra 1.6 (contact faces), Ra 3.2 (non-contact)
Current Rating	100A - 600A (cross-section dependent)
Cross-Section	30mm² - 200mm² (application dependent)
Plating Options	Tin (3-5μm), Nickel (3-5μm), Silver (2-3μm), Bare
Certifications	ISO 9001:2015, IATF 16949, RoHS, CE, REACH
Lead Time - Prototype	3-7 days
Lead Time - Production	7-15 days
MOQ	10 pieces (prototype), 100+ (production)
Origin	Dongguan, China

Applications

Battery Energy Storage Systems (BESS): Module-to-module links, rack-to-busbar links, battery string interconnects
EV Charging Infrastructure: DC bus links inside fast chargers, charging module interconnects, power distribution links
Solar Energy Systems: Inverter DC input links, combiner box bus links, battery bank interconnect cables
UPS Systems: Battery string links, rectifier-to-busbar links, inverter-to-output links
Data Center Power: Server rack power distribution links, PDU busbar connections, backup battery system links
Industrial Power Distribution: Motor control center links, switchgear bus connections, transformer terminal links

Why Choose Sinbo Precision

BESS-Specific Experience: Extensive experience supplying copper components to BESS integrators and EV charging manufacturers
Copper Machining Expertise: Daily copper machining experience with optimized tooling and processes
Integrated Bending + Machining: Complete in-house capability for bent components with precise hole positioning
Plating Network: Certified plating partners with XRF thickness verification and adhesion testing
Volume Scalability: Consistent dimensional accuracy from 10-piece prototypes to 10,000-piece production runs
Contact Resistance Testing: Optional 4-wire Kelvin measurement with performance data reporting

Manufacturing Process

Design Review: Cross-section calculation, shape optimization, hole pattern confirmation, and plating selection
Material Preparation: Copper plate shearing or waterjet cutting with material certification verification
Bending (if required): CNC press brake bending with minimum 3x material thickness radius
CNC Machining: Profile milling, precision drilling, chamfering, and face milling
Deburring & Cleaning: Edge breaking and ultrasonic cleaning for plating preparation
Plating & Inspection: Plating application with XRF verification and comprehensive dimensional inspection

Frequently Asked Questions

What cross-section do I need for 300A?

For C11000 copper in BESS enclosures (max 60°C ambient, 30°C temperature rise), approximately 70mm² minimum cross-section is required for 300A continuous current. We calculate exact cross-sections during design review based on your specific current rating, duty cycle, and ambient temperature requirements.

Tin plating or bare copper?

Tin plating is recommended for most BESS applications as it prevents oxidation, provides consistent contact surfaces, and remains solderable for field repairs. Bare copper is suitable only for tightly bolted connections in sealed enclosures with immediate installation.

Can you make a link with both bolt holes and a threaded stud?

Yes, we can incorporate threaded holes (M6, M8, M10) on one end for stud connections while maintaining clearance holes on the opposite end for bolt-through connections, accommodating various BESS rack design requirements.

What's the lead time for 5,000 links?

10-15 days including plating. Copper plate availability, efficient machining processes, and established plating partnerships enable rapid turnaround, with straight links typically faster than bent configurations.

Do you provide contact resistance data?

Yes, upon request we perform 4-wire Kelvin contact resistance measurements on sample basis and include detailed data in inspection reports. Typical contact resistance ranges from 0.1-0.3 milliohm for properly installed tin-plated links.

Can you stamp these instead of machining?

Yes, for straight links in volumes above 5,000 pieces, stamping offers cost efficiency with ±0.2mm tolerance. We recommend the most appropriate manufacturing method based on your volume, tolerance requirements, and economic considerations.

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products details

CNC Mechanical Parts

CNC Turning Parts

CNC Milling Parts

CNC Machining Services

Cold Forging Parts

CNC Turning Milling Parts

CNC Aluminum Parts

CNC Stainless Steel Parts

CNC Brass Parts

CNC Stamping Parts

Machining Plastic Parts

Bending Sheet Metal Parts

New Energy Auto Parts

Energy Storage Connectors

Contactor Terminal

Battery Terminal Connector

CNC Manufacturing Solutions

CNC Machined C11000 ETP Copper Energy Storage Link with Precision Hole Positioning for 300A Continuous Current in BESS