Lithium-ion Battery Cover Plates
As a key component of the battery cell, the Lithium-ion Battery Cover Plates serve as the core interface connecting the battery's internal electrochemical system with the external circuitry. It simultaneously performs three core functions: sealing, safety control, and signal transmission. It's more than a simple structural component; rather, it's a multifunctional hub that integrates mechanical strength, electrochemical compatibility, and safety redundancy. It must prevent electrolyte leakage from the battery casing and the intrusion of external moisture and impurities. It also requires integrated safety features (such as explosion-proof valves and overcurrent protection) to address abnormal operating conditions during battery charging and discharging. Furthermore, it provides a stable assembly foundation for conductive components such as the terminal and tabs, ensuring efficient current transmission.
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Product Introduction
With the rapid development of the new energy power and energy storage industries, lithium-ion batteries, as core energy units, are widely used in electric vehicles, home energy storage systems, industrial power modules, and communication base stations. As a key component of battery sealing and structural components, the Lithium-ion Battery Cover Plates are directly related to the safety, airtightness, and stable electrical performance of the entire battery pack.
With over 20 years of experience in the manufacturing of metal structural components for new energy batteries, we are committed to providing customers with battery cover plates and peripheral accessory solutions that offer high sealing, mechanical strength, and conductivity. Whether it's a prismatic aluminum battery, energy storage cell, power battery pack, or mobile energy storage power supply, our cover plate products ensure reliable connections, stable sealing, and efficient heat dissipation.
Product Features
High-Precision Structural Design
Each Power Battery Cover Plate utilizes high-precision stamping and CNC machining technology to ensure micron-level tolerances in end cap thickness, flatness, and seal groove dimensions.
The safety valve, terminal hole, and seal ring groove on the cover plate undergo rigorous stress distribution calculations and fatigue testing to ensure structural stability under high-voltage charge-discharge cycles and long-term operation.
01
High-Quality Alloy Materials
The Aluminum Cover Plate for Batteries body is primarily constructed from 3003, 5052, and 6061 series high-thermal conductivity aluminum alloys or customized stainless steel, achieving a balance of lightweight, corrosion resistance, and airtightness. For high-energy-density cells, optional high-strength aviation-grade aluminum alloys or composite coatings are available to enhance explosion protection and sealing reliability effectively.
02
Highly Efficient Sealing
Apollo's Copper and Aluminum Bimetal Bipolar Plates are sealed using fully automated laser welding or argon arc welding after the forming process. Custom rubber or fluororubber O-rings are used to achieve airtightness exceeding national standards (≤10⁻⁶ Pa·m³/s), effectively preventing electrolyte volatilization and external moisture intrusion.
03
Optimized Electrical Performance and Thermal Management
The internal terminals and busbar connectors of the Lithium Battery Top Caps are constructed from highly conductive copper or silver-plated aluminum. Precision welding and coating processes reduce contact resistance and energy loss. Furthermore, the structure allows for integrated thermal channels or heat dissipation holes to ensure temperature uniformity across the battery pack.
04
Manufacturing Advantages
1. Integrated Production System
Apollo boasts integrated production capabilities, from raw material stamping to CNC machining, welding, surface treatment, testing, and assembly. Fully automated processes ensure product consistency and high production efficiency.
2. Strict Quality Control System
All Prismatic Lithium Battery Lid products are ISO 9001, IATF 16949, and ISO 14001 certified.
Testing procedures include:
Airtightness testing (automatic testing with helium detectors)
Surface defect detection (CCD vision recognition)
Weld strength and dimensional testing (CMM coordinate measuring machines)
Conductivity and resistance testing
We ensure that every batch of Prismatic Lithium Battery Canopies meets the quality standards of new energy customers.
3. Diversified Process Capabilities
Apollo offers a variety of process combinations, including stamping + welding, stamping + milling, deep drawing + laser welding, and integrated die-casting, tailored to customer project requirements. Adaptable to battery cell packaging requirements of various sizes (from 100Ah to 320Ah and above).
4. Customized Development Capabilities
Leveraging our experienced mold engineering team and 3D structural design capabilities, we can quickly develop a matching aluminum battery cover structure based on customer-provided battery cell diagrams, assembly methods, and heat dissipation layouts.
We support custom drawings, processing with supplied materials, and OEM/ODM collaboration.
Design Advantages
| Modular Interface Layout | The LFP Safety Cover Set design is compatible with various battery cell configurations (stud, welded, and quick-release), and standard interface holes are reserved for easy assembly and automated production line use. |
| Explosion-proof and Pressure Relief Safety Valve Design | Each aluminum battery box cover can be integrated with an explosion-proof valve or pressure relief diaphragm, which quickly releases pressure in the event of abnormal pressure increases, preventing the battery cell casing from rupturing. |
| High-Precision Seal Groove Design | Finite Element Analysis (FEA) optimizes the seal groove depth and contact stress to ensure a complete seal despite repeated charge and discharge cycles. |
| Lightweight Structural Optimization | The Prismatic Lithium Battery Annex utilizes localized reinforcement ribs and thin-wall treatment to minimize weight while maintaining strength, thereby improving the battery pack's energy efficiency. |
| Visualization and Overflow Detection Design | For a specific energy storage system, Battery Cover Plates, liquid level observation holes, or sensor mounting holes can be reserved to facilitate maintenance and status monitoring. |
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