Custom lithium battery safety vent stamping parts

　　IATF 16949 Certified Custom Lithium Battery Safety Vent Stamping Parts: Precision Customization & Safety Assurance

　　In the era of rapid development of new energy vehicles (NEVs), the safety and reliability of lithium batteries, as the core power source, have become the top priority of industrial development. The lithium battery safety vent is a critical "safety valve" for battery packs, which can quickly release internal pressure in extreme situations such as thermal runaway, effectively preventing battery explosion and fire. Custom lithium battery safety vent stamping parts, with their tailored design, high-precision forming processes and compliance with strict quality standards, have become an indispensable core component for improving the safety level of NEV power batteries. Backed by IATF 16949 certification, these stamping parts provide solid quality guarantee for the customized needs of different battery models, injecting strong momentum into the high-quality development of the NEV industry.

　　1. Core Demand: Customization Drives the Upgrade of Lithium Battery Safety Vent Stamping Parts

　　The specifications and performance requirements of lithium batteries vary significantly among different NEV models, battery capacities and structural designs, which puts forward strict customized requirements for safety vent stamping parts. Traditional standardized stamping parts can no longer meet the precise matching needs of high-performance lithium batteries—either the vent opening pressure is mismatched, leading to premature or delayed pressure release, or the structural size is incompatible, affecting the overall sealing performance of the battery pack.

　　Custom lithium battery safety vent stamping parts solve this pain point through personalized design and precision manufacturing. They can be tailored to the battery's internal pressure threshold, structural space and sealing requirements, realizing precise matching of opening pressure (customizable within 0.3-1.2MPa) and dimensional parameters (tolerance control within ±0.05mm). More importantly, these custom stamping parts are fully compliant with the IATF 16949 international automotive quality management system standard—a globally recognized "pass" for entering the automotive supply chain. This certification strictly covers the entire lifecycle from customized design, R&D, prototype testing to mass production, ensuring stable and consistent quality control across all processes. Meanwhile, the stamping process, with its advantages of high production efficiency, high forming precision and strong batch stability, provides reliable guarantee for the large-scale supply of customized safety vent parts, which is highly recognized by mainstream NEV manufacturers such as BYD, Xpeng and Dongfeng Voyah.

　　2. Technological Core: Multi-dimensional Innovation Empowers Customized Safety Performance

　　2.1 Material Customization: The Foundation of Safety and Reliability

　　The performance of custom lithium battery safety vent stamping parts first relies on the precise selection and customization of high-performance materials. According to the different working environments and safety requirements of batteries, we have formed a targeted material matching system to ensure that the stamping parts have excellent pressure resistance, corrosion resistance and fatigue resistance:

　　Precision stainless steel: 304L and 316L stainless steel are selected for scenarios with high corrosion resistance requirements (such as battery packs with liquid cooling systems). These materials have excellent resistance to electrolyte corrosion and can maintain stable performance in long-term contact with lithium battery electrolytes. Through precision stamping, the tensile strength can reach more than 520MPa, ensuring that the vent does not deform under normal battery operating pressure.

　　High-strength aluminum alloy: For lightweight battery pack designs, aviation-grade 6061 and 7075 aluminum alloys are used. Their density is only 1/3 of that of steel, which can reduce the weight of the safety vent assembly by 40%-50% while ensuring pressure resistance. After solution aging treatment, the yield strength can reach more than 276MPa, fully meeting the lightweight and safety requirements of NEV batteries.

　　Thermoplastic composites: For special battery models with high temperature resistance requirements, PPS (polyphenylene sulfide) composite materials reinforced with glass fiber are adopted. These materials can withstand high temperatures of up to 260℃, which is compatible with the high-temperature environment of battery thermal runaway. The stamping parts made of this material have excellent dimensional stability and can maintain the accuracy of the vent structure even at high temperatures.

　　2.2 Forming Process Innovation: Precision Control for Customized Shapes

　　The customized shapes and precise performance requirements of lithium battery safety vents put forward extremely high requirements for stamping processes. The industry has formed a series of innovative process systems centered on "customized mold design + precision forming + intelligent detection":

　　Customized precision stamping with special die design: For different vent structures (such as circular, rectangular and special-shaped vents) and pressure-sensitive grooves, we design personalized stamping dies with precision grinding technology. The die gap is customized according to the material thickness (0.1-0.5mm) and material type, which can effectively reduce burrs (burr height ≤0.01mm) and avoid piercing the battery diaphragm due to metal burrs—a major hidden danger of battery short circuit. The one-time forming of the pressure-sensitive groove ensures that the opening pressure error is controlled within ±0.05MPa, realizing precise pressure release matching.

　　Progressive die stamping technology for multi-process integration: Aiming at the complex structure of customized safety vents (which often include forming, punching, flanging and other processes), progressive die stamping technology is adopted. Multiple processes are completed in one stamping stroke, which not only improves production efficiency by 60% compared with traditional single-process stamping, but also ensures the consistency of dimensional accuracy between different processes. The positional tolerance between the vent hole and the sealing edge is controlled within ±0.03mm, ensuring the sealing performance of the battery pack after assembly.

　　Digital precision stamping and real-time detection technology: The integration of CNC precision control, online visual detection and 3D scanning detection technologies realizes full-process monitoring of the customized stamping process, which is highly consistent with the IATF 16949 requirements for process traceability and defect prevention. During stamping, the online visual system monitors the dimensional parameters of each part in real time, and the deviation is automatically corrected by the CNC system; after forming, the 3D scanning technology is used for full-size inspection to ensure that the dimensional tolerance meets the IT6 level requirements. This two-way detection mode ensures that the pass rate of customized safety vent stamping parts reaches 99.9% or more, further consolidating the quality foundation required by IATF 16949 certification.

　　2.3 Post-processing Customization: Synergistic Enhancement of Safety and Durability

　　In order to further improve the safety and service life of custom lithium battery safety vent stamping parts, targeted post-processing technologies are adopted according to the material type and application scenario: For stainless steel stamping parts, passivation treatment is carried out to form a 3-5μm oxide film on the surface, which enhances corrosion resistance to electrolytes; for aluminum alloy stamping parts, hard anodizing treatment is adopted to form a 20-30μm ceramic layer with hardness exceeding 380HV, improving wear resistance and pressure resistance; for composite stamping parts, high-temperature resistant coating is applied to enhance the stability under extreme high temperatures. In addition, for the sealing surface of the vent, precision grinding and polishing are carried out to make the surface roughness Ra ≤0.8μm, ensuring tight fitting with the battery cover and preventing electrolyte leakage.

　　3. Application Value: Customized Safety Empowers the High-quality Development of NEV Industry

　　Custom lithium battery safety vent stamping parts have been widely used in square, cylindrical and soft-pack lithium battery packs of various NEV models, and have achieved remarkable application effects in improving battery safety, adapting to customized designs and enhancing industrial efficiency:

　　In terms of safety improvement: The customized safety vent stamping parts developed for a certain medium and large NEV model can accurately open at 0.8MPa. In the thermal runaway test, the pressure in the battery pack is released within 0.5 seconds, effectively preventing the battery pack from exploding. The pass rate of the battery safety test reaches 100%, which is 15 percentage points higher than that of using standardized parts. For battery packs with special working environments (such as high cold and high humidity), the customized corrosion-resistant and low-temperature-resistant safety vent stamping parts can maintain stable performance for more than 8 years, significantly improving the service life of the battery pack.

　　In terms of customized adaptation: For the ultra-thin battery pack of a new energy sedan, the customized ultra-thin safety vent stamping part (thickness only 0.15mm) realizes the perfect fit of the battery pack structure under the premise of ensuring pressure release performance. For the high-capacity battery pack of a new energy commercial vehicle, the customized large-area special-shaped safety vent stamping part increases the pressure release area by 30% compared with the traditional circular vent, improving the pressure release efficiency in extreme situations. These customized solutions provide strong support for the diversified design of NEV batteries.

　　In terms of industrial efficiency enhancement: The integration of customized mold design and precision stamping processes reduces the development cycle of new battery models by 40% compared with the traditional mode. The IATF 16949 certification further optimizes the production management system, helping enterprises implement strict quality control in the customized production process, reduce waste, improve process efficiency and enhance core competitiveness in the global supply chain. At present, leading enterprises that have passed IATF 16949 certification have built 12 customized stamping production lines, which can complete the development, testing and mass production of safety vent stamping parts for 50+ different battery models, efficiently meeting the supporting needs of mainstream NEV manufacturers and promoting the upgrading of the entire lithium battery industrial chain.

　　4. Future Trend: Towards High-performance and Intelligent Customization

　　With the continuous improvement of NEV battery energy density and the development of intelligent technology, custom lithium battery safety vent stamping parts are moving towards the direction of "high-performance material integration + intelligent pressure release + multi-functional customization". On the one hand, the integration of new materials such as shape memory alloys and carbon fiber composites will realize the adaptive adjustment of the vent opening pressure with temperature and pressure changes, further improving the safety redundancy; on the other hand, the integration of micro-sensor technology into the safety vent stamping parts will realize real-time monitoring of the internal pressure of the battery pack, providing early warning for battery safety risks. At the same time, the combination of topological optimization design and 3D printing mold technology will further shorten the customization cycle and realize the rapid iteration of personalized products.

　　At the same time, the research and development of new processes such as ultra-precision micro-stamping and laser-assisted stamping will continue to promote the performance upgrading of custom safety vent stamping parts. In the future, these stamping parts will not only be a key component to ensure battery safety, but also an important support for the NEV industry to achieve the goals of high safety, intelligence and lightweight, and will play a more critical role in promoting the global popularization of new energy vehicles.

　　As a core component to ensure the safety of lithium batteries, IATF 16949 certified custom lithium battery safety vent stamping parts not only redefine the safety boundary of NEV batteries with personalized design and precision manufacturing, but also provide solid quality assurance for the global layout of NEV manufacturers. In the future, with the joint efforts of materials, processes and intelligent technology, these customized stamping parts will surely inject more powerful impetus into the high-quality development of the global new energy automobile industry.

Read recommendations:

Sealing ring Precision electronic parts

Housing components for recessed downlights Precision electronic parts

Oval Magnetic Hardware Precision electronic parts

CNC Machining Dimension Accuracy

CNC processing factory - Meeting customers' strict requirements for precision