company info :
Zhongshan Oursun New Energy Co., Ltd. specializes in the R&D, manufacturing, and sales of high-performance lead-acid batteries and related accessories.Our product range not only includes automotive batteries, but also durable plastic battery boxes and plastic battery cases, aiming to provide safe and efficient storage solutions for various battery application scenarios.
afety remains a priority through insulated covers and sealed connections in VRLA batteries. Innovations like copper-plated terminals for electric vehicles and calcium-tin alloys for maintenance-free designs meet the industry's inquirement. Adhering strictly to standards such as SAE J537 and IEC 60095, our company guarantees diensional precision and consistent quality, we also offer practical maintenance guidelines to extend terminal lifespan.
As a customer-oriented enterprise, we ensure that every battery and accessory meets strict quality standards, which is supported by our ISO certification and cutting-edge production technology. By continuously optimizing the design of plastic battery casings and expanding our global distribution network, we are committed to providing reliable power solutions for partners around the world.
The following is the detailed information about the terminal products.
The core components of lead-acid battery terminals and related parts are made of lead alloys, with elements such as calcium and tin added to optimize performance:
Lead, as the base material, ensures low resistance (which is the key to good conductivity) and enables efficient current transmission during charging and discharging.
Calcium and tin can enhance corrosion resistance, reduce damage from sulfuric acid vapor, and increase mechanical strength, making the terminals more resistant to repeated use and vibration.
High-performance terminals (such as those for electric vehicles) are coated with a copper layer on the lead alloy surface, further reducing resistance to accommodate high current scenarios.
Insulation components (such as terminal covers) are typically made of plastic or rubber and serve an insulating function to prevent short circuits.
2. Design Types & Applications
Conductivity: The lead alloy components used in the positive terminal, negative terminal, lead sleeve, and terminal connector of the company's batteries have been carefully formulated to ensure low resistance. This design can reduce power loss during charging and discharging cycles and achieve efficient energy transmission, as is the case in automotive starting batteries.
Corrosion Resistance: The positive terminal, negative terminal, and related components are strengthened by adding alloy elements such as calcium and tin and applying surface coatings. These measures can resist sulfuric acid vapor and prevent the formation of white lead sulfate deposits - which is crucial for stationary energy storage batteries exposed to variable environments. - Mechanical Strength: The terminal connectors and lead sleeves have been specially designed to withstand repeated connection/disconnection operations, the weight of heavy cables, and vibrations (such as those in automotive usage scenarios). This ensures stability of the connection over a long period of use, especially for deep-cycle batteries in industrial equipment.
Safety Features: The insulating covers (plastic or rubber materials) on the positive terminal and negative terminal can prevent accidental short circuits, which is a key safety measure in consumer-grade backup power batteries. The sealed connection of valve-regulated lead-acid (VRLA) batteries can prevent electrolyte leakage onto the terminal connectors and lead sleeves, ensuring safe operation in various scenarios.
Temperature Stability: The lead alloy in the lead sleeve and terminal connector retains its ductility and conductivity within a wide temperature range (-40°C to 60°C). This ensures reliable performance in extreme climate conditions, whether in the frigid Arctic regions or the hot desert areas, such as in off-grid solar energy storage systems, where it can operate stably.
Industry Standards: All lead sleeves, terminal connectors, positive terminals, and negative terminals strictly comply with SAE J537 (automotive) and IEC 60095, ensuring dimensional accuracy, excellent corrosion resistance, and global industrial suitability.
Maintenance Tips: Clean corrosion (white/grey deposits) on terminal connectors, positive/negative terminals with baking soda solution to maintain low resistance. Tighten connectors regularly to prevent loosening, arcing, or overheating—critical in high-vibration vehicles.
Impact on Performance: Poor connections between terminal connectors and terminals reduce battery efficiency by up to 20% and shorten lifespan, a key concern for high-demand, stable-performance applications.
Modern lead-acid battery terminals increasingly adopt calcium-tin alloys to support “maintenance-free” designs, while some high-performance batteries use copper-plated lead terminals for ultra-low resistance in electric vehicle applications. The choice of terminal type directly influences a battery’s suitability for starting, deep-cycle, or stationary energy storage roles.
Product specification :
In terms of dimensions, we have clearly marked the diameters of each part of the terminals, such as D1, D2, D3, etc. We also provide different values for the positive and negative poles, and indicate the tolerance of the dimensions, such as D1 -0.20, D2 -0.20, etc. This ensures the manufacturing accuracy. Additionally, through multiple perspectives such as the main view, sectional view, and local view, we present the information to clearly display the shape, internal structure, and details of the terminals, facilitating the understanding of the overall structure and the relationship between each part.
