At Voltaplex, we take pride in delivering batteries that meet the highest standards of safety, performance, and reliability. Every battery produced undergoes a meticulous testing process to ensure it functions perfectly before it reaches our customers. This rigorous approach highlights our unwavering commitment to quality and customer satisfaction.
100% Testing for Sample Orders
For sample orders, we go the extra mile by testing each battery 100%. Every unit is inspected thoroughly to ensure it meets all specifications and performs as intended. This comprehensive approach ensures that sample products not only demonstrate the capabilities of our batteries but also provide complete confidence to our customers.
Batch Order Testing
For batch orders, we follow a systematic sampling process in line with international standards. A specific percentage of units are randomly selected and tested to represent the entire batch. This ensures that every production lot meets our stringent quality benchmarks while maintaining efficiency for larger orders.
Key Testing Parameters
Here’s a closer look at the testing process for our batteries, such as the VPMB-18650MJ1-7S1P-S (25.9V, 3.5Ah, 90.65Wh):
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Appearance Check
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The first and most fundamental step in our quality assurance process is an appearance check. We ensure that each battery unit is free from any visible defects such as cracks, ruptures, or leaks. Additionally, we check that all branding and logos are correctly applied to maintain consistency and brand integrity.
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For the VPMB-18650MJ1-7S1P-S battery, we confirmed that all units had the correct logo and showed no signs of physical damage. All units passed the appearance check with zero failures, ensuring that every product delivered meets the aesthetic and functional standards our customers expect.
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Connector and Cable Inspection
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We verify that the connectors and cables used in each battery pack meet industry specifications, ensuring safe and reliable connections. This includes testing the durability and functionality of connectors, such as the UL1007 16# connectors, and ensuring the cable length adheres to the required tolerances for proper installation and integration into devices.
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For the VPMB-18650MJ1-7S1P-S battery, the connectors were tested for functionality, and the cable lengths, specified at 100±5.0mm, were carefully measured across all samples. The inspection confirmed that all cables were within the required length and that the connectors were securely attached, with no issues found.
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Voltage and Internal Resistance Measurement
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Accurate voltage and internal resistance are crucial for the overall performance of lithium-ion batteries. Voltage is checked to ensure it is within the required range, guaranteeing efficient energy storage and discharge. Internal resistance is measured to assess the battery's ability to transfer energy effectively and to ensure optimal performance.
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The VPMB-18650MJ1-7S1P-S batteries were tested for voltage, with results well above the minimum threshold of 25.20V. The internal resistance was measured and found to be between 250.9mΩ and 264.9mΩ, well within the required range of ≤400mΩ, confirming that the battery packs would deliver reliable performance.
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Safety Tests
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Includes short circuit detection delay time and thermal resistor (NTC) -if installed- evaluations to validate the battery’s safety mechanisms, ensuring it can operate reliably in various conditions.
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Dimensional Accuracy
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To ensure that our batteries fit precisely in their intended applications, we conduct dimensional checks. This includes verifying the length, width, and thickness of each unit to ensure it meets the specified design tolerances. Consistency in these dimensions is critical for proper integration into devices and for ensuring the battery’s physical integrity.
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The dimensions of the VPMB-18650MJ1-7S1P-S battery pack were checked and found to be within the required limits:
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Length: 129.70mm to 129.88mm (specification ≤133.00mm)
Width: 70.33mm to 70.80mm (specification ≤72.00mm)
Thickness: 19.43mm to 19.60mm (specification ≤20.00mm)
All samples passed the dimensional inspection, confirming that each battery meets the physical requirements for compatibility with various devices
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Weight Verification
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Ensuring that each battery pack weighs within the specified range is essential for both product integrity and performance. Over or underweight battery packs could indicate potential issues with construction or components, so we verify the weight to ensure consistency.
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Confirms the battery weight is approximately 360g, matching the expected specifications.
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Compliance with International Standards
Our testing process aligns with globally recognized standards, ensuring consistent quality across all orders:
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Customer Standards: Customized to meet specific client requirements.
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Battery Inspection Standards: Detailed procedures for verifying performance and safety.
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Sampling Standards for Batch Orders: Following GB/T2828.1.2012, with Acceptance Quality Limits (AQL) of 0.65 for major defects and 1.0 for minor defects.
A Commitment to Excellence
By adhering to such rigorous testing protocols, we guarantee that all our batteries—whether sample or batch orders—are safe, reliable, and fully functional upon delivery. We carefully document every inspection and attach detailed test reports for transparency, giving our customers complete confidence in our products.
When you choose Voltaplex, you’re not just purchasing batteries; you’re investing in a product that has been rigorously tested and crafted with care. Contact us today to learn how our dedication to quality can power your projects with unmatched reliability.