UEALINK × BYD Co., Ltd. New Energy Vehicle High-Voltage Wiring Harness Supply Collaboration Case

I. Project Background

BYD Co., Ltd. covers the entire industrial chain of new-energy passenger vehicles, power batteries, photovoltaic energy storage, and charging-pile equipment. Automotive high-voltage wire harnesses must withstand a wide temperature range of -40°C to 150°C, endure long-term vibration and shock, ensure high-voltage insulation safety, and simultaneously meet vehicle lightweighting requirements, automated mass production standards, and mandatory CCC/UL2263/TUV certifications in multiple countries.

UEALINK boasts an automated production line dedicated to automotive wire harnesses, certified under the IATF16949 automotive quality management system. It provides one-stop solutions for high-voltage cables, charging-gun wire harnesses, and battery-pack connection components, fully supporting BYD’s large-scale, continuous production needs across its vehicle lineup and energy-storage facilities.

II. Key Collaboration Data and Outcomes

1. Order and Delivery Data

   Long-term framework cooperation spanning the entire industrial chain, covering BYD’s passenger vehicles, power battery PACKs, outdoor charging piles, and commercial-industrial energy-storage equipment. Standardized mass production of automotive-grade high-voltage cables and charging wire harnesses is supported, with simultaneous R&D and custom prototyping for new models. MOQs align with automakers’ bulk procurement rules, eliminating additional inventory costs.

   The Dongguan plant, with 55,000㎡ of facility space, features multiple dedicated twisted-wire and high-voltage wire-harness assembly lines, as well as exclusive channels for automotive-grade projects. Response time from drawing approval to mass-production delivery is ≤48 hours. Domestic automakers receive EXW deliveries nearby, while overseas new-energy projects are supplied with complete automotive-grade customs clearance documentation. Annual on-time delivery rate reaches 100%, completely resolving issues of production-line downtime due to material shortages.

2. Quality and Compliance Performance

   All supplied cables comply with IATF16949 automotive standards, withstanding 1,000V DC and adapting to both high and low temperatures as well as continuous vibration conditions in vehicles. Products hold full sets of automotive certifications, including CCC, UL2263, and TUV, and exhibit oil resistance, vibration resistance, and crack resistance.

   Rigorous incoming-material inspections, high-voltage insulation tests, and aging durability assessments are conducted. Incoming-inspection pass rate stands at 100%, and during whole-vehicle crash and high/low-temperature durability tests, no failures have been reported in the cable segment, ensuring zero high-voltage insulation safety risks.

3. Quantified Value of Supply-Chain Collaboration

   ① Enhanced High-Voltage Safety Across the Vehicle: Cables remain free from cracking or aging under high- and low-temperature, vibration-prone conditions, reducing overall high-voltage system failure rates by 68%.

   ② Improved Vehicle Lightweighting and Range: The accompanying wire harnesses collectively reduce weight by 25%, boosting average range of mainstream models by 6km.

   ③ Zero Delays in Mass Production and Delivery: Stable, large-scale production scheduling ensures 100% on-time delivery of both vehicle and charging-pile wire harnesses, eliminating production-line downtime.

   ④ Increased Factory-Quality-Inspection Efficiency: Standardized, unified wire-harness configurations enhance overall factory inspection efficiency by 20%.

III. Significance of the Project Collaboration

In this collaboration, UEALINK fully meets BYD’s stringent requirements for vehicle-wide safety, lightweighting, global compliance, and large-scale mass production across the entire new-energy vehicle, energy-storage, and charging-pile value chain. This enables end-to-end implementation—from high-voltage cable R&D and integrated wire-harness processing to comprehensive automotive-certification reporting and synchronized vehicle delivery—without any batch-quality or delivery delays. Leveraging this flagship case with a leading new-energy automaker, the company has refined its standardized supply system for both new-energy vehicles and energy storage, laying a solid foundation for expanding into industrial energy-storage and aerospace clients such as Weiteng Electric and United Aircraft.