At 2 AM, the R&D department of a battery factory in Longgang, Shenzhen, was still brightly lit. Project Manager Li stared at the third failed IEC62619 test report, his tired face illuminated by the screen—only 45 days remained until the delivery date for the first batch of orders from the European client.

For medium-sized battery factories like ours, every overseas energy storage order is crucial. It is not just about profit, but a ticket to the international high-end market.

However, the "ticket verification" standard—IEC62619—has become the most tricky technical barrier on our path forward. This is not a standard for ordinary consumer batteries, but a "safety bible" specifically for industrial energy storage battery systems.

01 The Roadblock: Real Dilemmas We Faced

Last year, we received an inquiry from a German energy storage integrator who was highly interested in our residential energy storage battery packs (48V100Ah), but with a prerequisite: we must provide CB certification with IEC62619 as the core standard.

Initially, we thought our experience with consumer battery certifications (such as IEC62133) would suffice. But reality dealt us a heavy blow:

• "Minute Differences" in Standard Understanding: IEC62619’s requirements for "functional safety" far exceeded previous standards. It not only requires batteries to avoid fire or explosion under single faults but also mandates that the entire Battery Management System (BMS) possess fault prediction, diagnosis, and mitigation capabilities.
• "Unexpected" Test Items: The standard’s requirements for external fire testing and thermal propagation assessment are extremely stringent.
• "Endlessly Prolonged" Project Cycle & "Full Black Box" Process: Two failed tests consumed high testing fees, and more critically, valuable time and an opaque process.

We realized that relying solely on our own "trial-and-error" approach would likely cost us the order. We needed to find a professional partner who truly understood the field and could provide transparent, trackable solutions.

02 The Turning Point: Professional Diagnosis, Targeted Solutions & Transparent Processes

Recommended by industry peers, we contacted Guangdong Energy Storage Testing Technology Co., Ltd. Their experts pinpointed our core issue in the first meeting: "You are using consumer battery thinking to design industrial energy storage safety."

They provided us with a clear three-step solution, and the online client system integrated throughout the process completely transformed how we managed the testing project.

Step 1: In-Depth Gap Analysis & Transparent Documentation

Instead of rushing us to submit samples, the energy storage testing engineers first organized a specialized training session on the IEC62619 standard. All training materials and interpretation notes were uploaded to our exclusive client system archive for the team to access anytime.

Subsequently, they reviewed our technical documents clause by clause against the standard, delivering a detailed Gap Analysis Report. Rather than a static document, this report was broken down into actionable tasks in the client system, each with clear responsible parties, rectification suggestions, and deadlines. For the first time, we had a clear, trackable understanding of the full scope of issues and the path to resolution.

Step 2: Pre-Testing, Real-Time Data Sharing & Targeted Rectification

This was the most critical step. Energy Storage Testing recommended conducting a full set of pre-tests in their laboratory. Unlike the previous "submit samples → wait → receive report" model, this time we participated in "transparent testing" throughout.

Through the real-time data dashboard in the client system, we could remotely monitor the testing progress. For example, during the "overcharge" test, the system displayed not only real-time voltage and current curves but also synchronized BMS signal trigger logs. When their engineers detected a minor delay in our balancing circuit, the system immediately generated an "abnormal event" alert, accompanied by real-time data screenshots and analytical comments. This "test-while-rectify, data-sync" model allowed our engineers to understand the root cause instantly—even remotely—and collaborate on adjusting the balancing activation threshold and algorithm. Rectification efficiency improved exponentially.

Step 3: One-Stop Formal Certification & Visual Progress Management

After confirming the product passed all pre-tests, all test data and draft reports were archived in the system. Energy Storage Testing assisted us in preparing full CB system documentation and submitted the formal application using their CBTL (CB Testing Laboratory) qualification.

Most reassuringly, every stage—from sample warehousing, test scheduling, report compilation to NCB certification issuance—was updated in real time on the client system. We no longer had to repeatedly call to check progress.

03 The Outcome: Victory from Passive Waiting to Active Control

With the dual support of Energy Storage Testing’s "professional solutions + transparent system," the project underwent a fundamental transformation:

• Dual Improvements in Efficiency & Control: From initiating formal rectification to obtaining the CB test report, the total time was only 8 weeks—30 days shorter than our initial self-exploration estimate. More importantly, we were never "out of touch" or "blindly waiting"; we always knew the project phase, next steps, and required preparations.
• One-Time Pass & Data Asset Accumulation: The product passed all IEC62619 items in the final formal test on the first attempt. All test data, reports, and communication records were accumulated in the client system, becoming valuable digital assets for our product technical archives and laying a solid foundation for future product iterations and series certifications.
• Winning Orders & Building Long-Term Trust: After submitting the authoritative CB report and rigorous project documentation to the German client, we quickly gained their technical approval and deep trust, with the first batch of orders successfully secured. We established not just a product development process, but a predictable, manageable international compliance cooperation model.

04 The Foundation of Trust: Dual Guarantees of Professional Strength & Transparent Services

Through this cooperation, we deeply recognized that in complex international certifications, professional capability is the foundation, while process transparency is the key to eliminating anxiety and building trust. The strengths that convinced us about Energy Storage Testing include:

• "Understanding the 'Why'" Behind Standards & Traceable Solutions: Their engineers not only interpret standards but also explain the underlying safety logic.
• "Dual-Wheel Drive" of Hardware Qualifications & Digital Tools: Their CBTL qualification and advanced testing equipment are hard strengths. The client system is the core manifestation of soft power—it visualizes the laboratory’s efficient operations and service details, making us feel like "partners" co-managing the project rather than passive "service recipients."
• Project-Based Services & Objective Data Visualization: They assigned a dedicated project manager and technical expert. More importantly, the client system transformed the service process into objective, real-time, visual data dashboards (e.g., test progress percentage, time spent in current phase, document delivery status). All commitments and progress are backed by factual data, greatly enhancing mutual trust.

05 Practical FAQs from Real Experience

Q: What are the main differences between IEC62619 and the common IEC62133 standard?

A: These are standards for different applications. IEC62133 focuses on batteries for portable devices, emphasizing basic safety. In contrast, IEC62619 is specifically for stationary energy storage (e.g., residential energy storage, communication base station backup power) and industrial power (e.g., forklift) battery systems. It places greater emphasis on system safety, reliability, and functional safety under long-term, high-load, complex environments. Its testing requirements (such as external fire testing, thermal propagation, and software functional safety assessment) are far more stringent and complex than IEC62133.

Q: Can the IEC62619 report from CB certification be directly used to convert to certifications in other countries?

A: Yes—this is the greatest advantage of the CB system. IEC62619 is an international standard issued by the International Electrotechnical Commission (IEC), widely adopted globally or used as the basis for national standards (e.g., Australia’s AS/NZS 62619). With a CB test report and certificate, you can conveniently apply for certifications in other countries through the conversion process, significantly saving time and costs associated with duplicate testing.

Q: How long does the entire process typically take from initiation to certification issuance? How to control it accurately?

A: The timeline depends on the initial product status and preparation. For products with a solid foundation, the entire process (including testing, reporting, and certification issuance) can usually be controlled within 2-3 months by working with a professional institution for pre-testing and rectification. Choosing a service provider like Guangdong Energy Storage Testing Technology Co., Ltd.—which offers a transparent project management system—is crucial. Through their client system, you can real-time monitor the progress and estimated time of each phase, transforming uncontrollable "black-box waiting" into a predictable, manageable "transparent process" to accurately control the overall timeline and ensure project success.

For any battery factory aiming to expand into the global energy storage market, IEC62619 certification is not an optional question, but a mandatory one. Our experience proves that partnering with a provider with top-tier professional capabilities and end-to-end transparent management tools not only solves this challenge but also transforms the certification process from a cost center into a value-driven project that builds customer trust and enhances internal management.