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【Abstract】: Automotive precision stamping parts stamping process is generally based on the drawing process, bending process, punching process; 1, automotive precision stamping parts drawing process: drawing parts flange and side wall fillet radius R and the bottom and side wall fillet radius R should be enlarged as much as possible, the fillet radius is large, can make the parts easy to draw forming, drawing parts should be symmetrical as far as possible or to take the left and right symmetry of the drawing parts; in order to become a double drawing, and then Cut into two pieces. Automotive precision stamping parts stamping process is generally based on the drawing process, bending process, punching process: 1.Automotive precision stamping parts stretching process: stretching parts flange and sidewall corner radius R and the bottom and sidewall corner radius R should be enlarged as much as possible, the corner radius is large, can make the parts easy to stretch forming, stretching parts should try to symmetrical or take the left and right symmetrical stretching parts; so that into a double stretching, and then cut into two pieces. 2.Automotive precision stamping parts bending process: bending should prevent the deformation of the hole, hole edge and bending should be an appropriate distance to avoid the deformation of the hole, the length of the curved edge is not easy to be too small, the bending parts should try to consider the positioning of the process holes and into a double bending, in order to change the force situation. 3.Automotive precision stamping stamping process: in the shape of the material should try to make reasonable sampling, reduce waste, linear or curved joints should be appropriate rounded corners, which facilitates the manufacture of molds, maintenance and use.  

Living in the twenty-first century, for the metal stamping will not feel strange, it can be said that it is at any time in the daily life of the see, but some of the metal stamping due to a variety of reasons is very easy to damage, then, what measures can be better to prevent the damage of these metal stamping parts? 1. The model, specification and performance of the selected metal fittings should be in line with the current national standards and relevant regulations, and matched with the selected ones. 2. Sliding windows or double-glazed doors and windows with a width of more than 1 meter should be set with double pulleys, or choose rolling pulleys. 3. Sliding support hinges should not use aluminum alloy, and stainless steel material should be used. 4. Installation of metal stamping with fastening screws must be installed with metal liner, the thickness of which should be at least twice the pitch of the teeth of the fasteners. It shall not be fastened to plastic profiles, nor shall non-metallic liners be used. 5. Hardware accessories shall be installed last. Door and window locks, hand-helds, etc. shall be assembled after the sash enters the frame to ensure proper location and flexible opening and closing. 6. After installing the metal stamping parts, attention should be paid to maintenance to prevent rust and corrosion. In daily use, it should be opened and closed gently to prevent damage to the hard switch.

As a core technological breakthrough by HTD (Hongneng) in the new energy field, our launched busbar thermal runaway protection solution aims to provide customers with the perfect balance of high conductivity, high thermal safety, and reliability. Through material innovation, structural optimization, and process innovation, HTD has successfully addressed the challenge of thermal runaway protection for busbars under extreme conditions, achieving a comprehensive improvement in safety performance. HTD Material Innovation: Application of High-Temperature Resistant Conductive Materials HTD employs high-purity oxygen-free copper and copper-aluminum composite materials to replace traditional conductors. By optimizing material formulations and surface treatment processes, the busbar's continuous operating temperature rating is elevated to 180°C while ensuring excellent electrical conductivity. Simultaneously, mica-based composite insulation materials are applied to maintain short-term insulation performance above 800°C under thermal runaway conditions. HTD Structural Design: Optimization of Heat Diffusion and Isolation HTD utilizes thermal simulation analysis and topology optimization algorithms to redefine the busbar's heat dissipation structure. The traditional planar heat dissipation design is upgraded to a composite structure of three-dimensional fins and microchannels, increasing the heat dissipation area by over 30%. Through bionic heat flow path design, directional heat diffusion and rapid isolation are achieved during a thermal runaway event, preventing chain reactions. HTD Connection Process: Low Thermal Resistance Connection Technology For busbar system connections, HTD adopts advanced processes such as laser welding, diffusion welding, and precision crimping. These processes achieve low resistance and low thermal resistance characteristics at the connection interface while avoiding contact issues and local overheating associated with traditional bolted connections. HTD's welding processes also enable high-strength connections between dissimilar materials, accommodating complex thermal expansion requirements.   HTD Insulation Design: Multi-Layer Protection System HTD innovatively develops a composite insulation system combining PPS injection molding and mica tape winding. By optimizing insulation layer thickness and material combinations, the temperature rating is significantly improved while ensuring electrical safety. Furthermore, using a ceramicized silicone rubber coating forms a ceramic protective layer under extreme high temperatures, achieving self-recovering insulation performance.   HTD Thermal Management Integration: System-Level Thermal Protection HTD adopts a deeply integrated solution combining busbars with the battery thermal management system. By optimizing busbar layout and coordination with cooling channels, efficient heat extraction is achieved. Phase Change Materials (PCM) are utilized at critical busbar nodes to absorb instantaneous thermal shocks. Combined with BMS intelligent monitoring, millisecond-level response to thermal anomalies and active protection are realized.   HTD Stamping and Molding Process: Integrated Forming Technology HTD applies core processes of precision stamping and injection molding to achieve lightweight and high-performance busbar components. The stamping process can produce copper-aluminum busbars with complex heat dissipation structures, with tolerance control of ±0.05mm. The injection molding process enables integrated forming of copper bars and insulation layers, ensuring a sealing rating of IP67 or above. Notably, the pre-placed mica tape injection molding technology allows for stable mass production of high-temperature resistant insulation.   HTD Quality System: Thermal Safety Verification HTD has established a comprehensive thermal safety product verification system, including thermal simulation analysis, temperature rise testing, and thermal runaway testing. Multi-physics field coupling simulation optimizes busbar thermal design. Bench tests such as high-current temperature rise and local overheating verify thermal performance reliability. Finally, module-level thermal runaway testing ensures the safety protection capability of the busbar system under extreme conditions.   HTD (Hongneng) is committed to providing safer, more reliable, and more efficient busbar thermal runaway protection solutions for new energy vehicles through continuous technological innovation, helping customers enhance their product safety competitiveness.

As a core technological breakthrough by HTD (Hongneng) in the field of conductor connection, our Copper-Aluminum Composite Busbar solution is designed to provide customers with the perfect balance of high performance, lightweight design, and optimal cost. Through material innovation, process innovation, and structural optimization, HTD has successfully addressed the reliability challenges of applying dissimilar copper-aluminum materials, achieving significant cost reduction. HTD Material Innovation: Copper-Aluminum Composite Process HTD employs proprietary Rolling Composite and Cladding Welding Technology. A high-conductivity copper layer is retained at critical electrical connection interfaces, while an aluminum core is used for long conductor sections. With aluminum costing approximately one-third of copper, this approach can directly reduce material costs by over 40%, while simultaneously achieving a system weight reduction of 30%-50%, realizing cost reduction and efficiency improvement from the source. HTD Connection Technology: The Cornerstone of Reliability Reliable copper-aluminum connection is an industry pain point. HTD applies advanced processes such as Laser Welding, Diffusion Brazing, and Friction Welding. Through precise thermal control and interface design, the formation of brittle intermetallic compounds is effectively suppressed, ensuring connection points possess low contact resistance, high mechanical strength, and excellent long-term stability, guaranteeing cost reduction without compromising quality. HTD Surface Treatment: Long-lasting Protection Addressing the risk of electrochemical corrosion between copper and aluminum, HTD implements specialized Tin Plating or Nickel Plating​ treatments on exposed aluminum surfaces and composite interfaces, forming a dense protective layer. This process ensures the conductor maintains excellent electrical performance and corrosion resistance even in harsh environments like humidity and salt spray, extending product service life. HTD Thermal Management Design: Performance Assurance HTD leverages aluminum's good thermal conductivity to optimize the cross-sectional structure and layout of the composite busbar, promoting uniform heat distribution and rapid dissipation. Combined with high-performance thermal interface materials, local overheating is effectively prevented, ensuring the safe and stable operation of the conductor under high-load conditions, safeguarding system reliability. HTD Structural Optimization: Ultimate Cost Efficiency HTD innovatively introduces Local Composite Design, using copper only at critical locations such as bolt connections and welding terminals, while employing aluminum for the main long-distance transmission body, achieving ultimate cost optimization. Through lightweight designs like hollow or special-shaped cross-sections, material usage and weight are further reduced while ensuring mechanical strength and current-carrying capacity. HTD Quality System: Full-process Control HTD has established a strict full-process quality control system, employing Online Conductivity Detection, Ultrasonic Flaw Detection, and Micro-ohm Level Contact Resistance Testing​ to conduct 100% inspection of composite interface bonding strength, welding quality, and electrical performance. This ensures every HTD Copper-Aluminum Composite Busbar product meets high-performance standards, providing customers with a reliable, high-cost-performance solution. HTD (Hongneng) is committed to creating greater value for customers through continuous technological innovation.

As a core technological breakthrough by HTD (Hongneng) in the new energy field, our battery pack tray lightweighting solution focuses on transitioning from traditional die-casting to advanced stamping processes. This shift aims to provide customers with the perfect balance of structural integrity, cost efficiency, and significant weight reduction for battery pack systems. HTD Material Selection: High-Strength Aluminum Alloys for Stamping HTD utilizes specially formulated 5xxx and 6xxx series aluminum alloys​ optimized for stamping processes. These materials offer an excellent strength-to-weight ratio, good formability, and corrosion resistance. Compared to die-cast trays, stamped aluminum trays can achieve weight reduction of 25-40%​ while maintaining or improving mechanical performance, directly contributing to increased vehicle range. HTD Process Innovation: Advanced Stamping Technology Replacing die-casting with high-precision progressive stamping and hot stamping​ processes allows HTD to produce complex, integrated tray structures in fewer steps. Stamping enables tighter tolerances, better material consistency, and the creation of intricate reinforcing ribs and features directly in the sheet metal, eliminating the need for additional brackets or supports, further reducing part count and weight. TT Structural Design: Monocoque & Integrated Stamped Tray HTD employs monocoque (unibody) design principles​ through stamping. A single, large stamped aluminum panel forms the core structure, integrating side walls, cross members, and mounting points into one piece. This design minimizes joints, welds, and fasteners, leading to a stiffer, lighter, and more reliable tray​ compared to multi-piece die-cast or assembled designs, while simplifying assembly. HTD Cost & Efficiency: Stamping Advantages The stamping process offers substantial cost and lead time benefits​ over die-casting. It requires lower initial tooling investment, has faster cycle times, and generates less material waste. This makes the solution more scalable and cost-effective for high-volume production, translating into significant savings for customers without compromising quality. HTD Performance Validation: Strength & Safety HTD stamped trays undergo rigorous finite element analysis (FEA) and physical testing​ for crush resistance, torsion stiffness, and vibration fatigue. The tailored properties of stamped high-strength aluminum ensure the tray meets stringent safety standards (like GB 38031) for battery protection, providing robust containment for cell modules under various impact and load conditions. HTD Thermal & Sealing Integration The stamped tray design seamlessly integrates cooling channel layouts​ and sealing surface features. Precise forming allows for the incorporation of mounting surfaces for cold plates and consistent flanges for liquid ingress protection (IP67) seals. This integration ensures efficient thermal management and environmental protection in a lightweight package. HTD (Hongneng) is committed to driving innovation in battery pack design. Our shift to advanced stamping for battery trays demonstrates our focus on delivering lightweight, high-performance, and cost-competitive solutions that power the future of electric mobility.