Copper Cap Contact For Electric Vehicles
The Copper Cap Contact for Electric Vehicles is the core conductive and connection unit within EV/energy storage fuses. Made from a 99.99% high-purity copper cap and precision contacts through stamping, electroplating, and multi-station welding, it ensures millisecond-level fuse protection for DC systems above 1000 V while maintaining a contact resistance of less than 5 µΩ and a temperature rise of less than 30 K, providing the final line of defense for high-voltage safety throughout the vehicle.
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction
The Copper Cap Contact for Electric Vehicles is an electrical connection component designed specifically for high-voltage DC protection systems in new energy vehicles. It is widely used in applications such as EV fuses, PDU protection modules, energy storage systems, UPS DC busbars, and photovoltaic protection devices. Stamped from high-purity copper or high-strength brass and processed through a variety of precision welding and electroplating processes, this product can be customized to meet customer needs. It is a core component critical to its connectivity and electrical conductivity.
Core Advantages Analysis
| Highly conductive raw materials ensure a stable current-carrying capacity |
Red copper material (T2Y2 / SECu / C1100) with a purity of 99.99% and a conductivity of %IACS ≥97 Hardness range of HV 80-110, balancing ductility and strength Used in contact areas, it minimizes power loss and overheating risks |
| High-strength brass base material with excellent forming precision |
Stamped from H65 brass (CuZn36 / C2700), with a tensile strength of ≥440 MPa Excellent structural stability and mechanical strength, suitable for connection applications requiring high strength Excellent stamping performance, suitable for stamping and bending Copper Cap Contact for Vehicle Fuses with complex structures |
| Diverse plating options to meet the needs of various electrical environments |
Silver plating: Enhances conductivity, reduces contact resistance, and is heat-resistant and oxidation-resistant Bright tin plating & Matte Tin: A low-cost alternative to silver for medium-current applications. Nickel Plating: Improves surface corrosion resistance and mechanical wear resistance. All EV Fuse Contacts with Bolt Mounts undergo ultrasonic cleaning to ensure a clean surface, suitable for high-reliability soldering and packaging processes. |
| Exquisite Craftsmanship and High Welding Reliability |
A variety of joining processes are available: soldering, silver soldering, laser welding, and resistance welding. We can design our molds and welding fixtures to ensure consistent and efficient welding. All welds undergo strength and peel testing to ensure long-term, reliable operation. |
| Large-Scale Delivery Capabilities and Stable, Flexible Delivery Schedules |
Monthly production capacity reaches 50 million units, meeting the needs of high-volume projects. Order delivery time is as short as 7-10 days, and sample delivery (including molds) is 20-25 days. Free samples of 10-50 units are available for testing, enabling rapid verification and implementation. |
Detailed Production Process
1. Material Preparation and Inspection
We use environmentally friendly copper materials that comply with RoHS and REACH standards, and conduct a full batch inspection upon arrival.
Red copper is used for the conductive contacts, and brass is used for the Fuse Contact Knife Cap support, ensuring a stable and coordinated structure and electrical performance.
2. Mold Development and Stamping
Our in-house mold design team customizes stamping molds based on customer drawings.
Mold machining accuracy reaches ±0.01mm, ensuring dimensional consistency.
Stamping involves multiple processes, including cap stretching, bending, and hole punching, ensuring Copper Cap Contact for EV Battery Fuse geometric tolerances remain within control.
3. Surface Treatment
After stamping, the surface is degreased, polished, and cleaned.
Different electroplating thicknesses and methods are selected based on customer requirements.
After electroplating, salt spray testing and adhesion testing are performed to ensure both corrosion resistance and electrical conductivity.
4. Welding Assembly
The contacts are connected to the Tin Plated Copper End Caps via soldering, silver soldering, or laser welding, with meticulously controlled weld zones.
Strict welding temperature control ensures no damage to the substrate and prevents cold or false solder joints.
Automated soldering processes can be designed based on customer structural requirements to improve efficiency and consistency.
5. Finished Product Inspection and Packaging
Each batch of Copper Cap Contact for Electric Vehicles undergoes dimensional measurement, solder joint strength testing, on-resistance testing, and visual screening.
Packaging utilizes plastic-lined boxes (or pallets) to ensure safe and clean transportation.
Each product is accompanied by a batch traceability code, enabling full production traceability and facilitating quality control and management.
Typical Application Scenarios and Future Trends
Application Areas:
EV fuse modules: such as battery pack high-voltage protection and onboard PDU modules
Energy storage system fuse protection: Suitable for DC-side protection needs of integrated solar-storage systems and industrial energy storage pods
PV system and inverter protection: Used in string/parallel fuse packages
UPS and data center DC protection: Improve long-term reliability and temperature rise control
NH/BS series fast-acting fuse caps: Suitable for scenarios requiring a combination of high conductivity and high temperature resistance
Application Prospects:
With the rapid development of new energy vehicles, solar-storage systems, and smart grids, demand for high-voltage DC fuses has surged, placing higher demands on copper cap contact assemblies. Future Cap and Contact for Battery Pack Fuse development will move towards the following:
Integrated structural design: Cap body, contacts, and terminals are integrated into a single unit
Automated welding trends: Higher efficiency and greater consistency
Environmentally friendly electroplating technology: Lead-free plating and low-VOC treatment solutions
Higher current rating support: Caps capable of handling higher current surges in 800V systems
contact us
We support OEM/ODM collaboration and can provide custom designs and batch production based on customer drawings, samples, or functional requirements.
We welcome global buyers and our engineering team to contact us with samples and drawings to collaborate on efficient and reliable electrical connection solutions.
Contact us for free samples and customized solutions!
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