Innovative Battery Test Sets New Safety Standards for Energy Storage Solutions

Industry First! The “Fully Charged Cell Twisting Test” by Inpai Battery Establishes a New Paradigm for Energy Storage Safety!
“Look, this fully charged battery has been twisted into a spiral and hasn’t smoked or caught fire…” On April 10, during the 13th Beijing International Energy Storage Exhibition, the Inpai Battery booth was bustling with visitors. The reason for the excitement was the demonstration of the industry’s first “Fully Charged Cell Twisting Test.” After violently twisting a fully charged cell into a spiral shape, it remained stable without any signs of smoke or fire, with voltage, current, and temperature all maintained at stable levels. This test not only captivated the audience but also quietly reshaped the industry’s understanding of energy storage safety.

<b>A New Phase in Energy Storage Safety for High-Quality Development</b>
With the large-scale deployment of renewable energy worldwide, the global battery energy storage industry (BESS) is rapidly advancing. According to the International Energy Agency's report "2024 Battery and Energy Security Transition," it is predicted that the scale of battery deployment will dramatically increase over the next decade. By 2030, global energy storage capacity is expected to grow sixfold. As the "stabilizer" of energy systems, the safe and stable operation of energy storage facilities is directly related to public safety. As the scale of energy storage systems continues to expand, the industry's focus on safety has reached new heights. Strengthening the foundation of energy storage safety and enhancing the safety of energy storage batteries to ensure stability under various conditions—such as mechanical stress, thermal runaway, chemical chain reactions, and battery aging—has become an important demand in this new phase of the industry.

Facing these new challenges, Inpai Battery, as a pioneer in the battery sector, is committed to providing customers with the utmost safety, reliability, and economic efficiency in energy storage products and solutions. The company possesses a unique understanding of safety standards for energy storage batteries and continually seeks to explore new safety limits.

<b>From Passive Protection to Active Verification</b>
"Safety requires proactive verification," said the general manager of Inpai Battery at the exhibition. "We simulate the most extreme vehicle collision scenarios, applying multiple stresses such as twisting and compressing to ensure absolute reliability in real accidents." When it comes to protecting people's lives and property, there is no room for "almost" or "sufficient"—only "more reliable" tests can withstand various emergencies. Therefore, beyond conventional industry standards, Inpai Battery has chosen to undertake additional testing. The company has transformed its extensive experience with automotive-grade safety standards in power batteries into extreme environmental stress tests for energy storage safety. This is exemplified by the "Fully Charged Cell Twisting Test," which maximally simulates risks faced by energy storage batteries during actual operation, using direct physical destruction to replicate the most stringent external conditions. This verifies that Inpai’s energy storage batteries can maintain safety even when subjected to extreme external influences—whether from electrical short circuits, mechanical damage, or environmental climate impacts—ensuring peace of mind for customers.

<b>Automotive-Grade Standards Forge Ultimate Safety Genes</b>
What empowers Inpai Battery to enhance safety is its long-standing commitment to automotive-grade product quality standards. The battery safety demonstrated in the twisting test is the best representation of Inpai’s adherence to automotive-grade intrinsic safety. For Inpai, the automotive-grade standard is not just a label; it is a solid commitment to delivering quality products to customers. From the early stages of material development, Inpai has opted to use many high-standard materials to ensure the intrinsic safety of its products. For example, the new nano-ceramic coated separator technology improves tensile strength by 40%, puncture strength by 30%, and withstands high temperatures of 190°C, exceeding the industry by 27%. Additionally, to resist external damage, Inpai's research and development team has innovated with a high-strength aluminum casing design, optimizing welding processes to increase weld strength by 30%, significantly enhancing the overall pressure resistance capability of the cell to over 1200 kN, far exceeding conventional standards.

The "thermal runaway interruption" technology is also a top priority. While the industry commonly uses a 200°C trigger for fuses, Inpai has introduced aerospace-grade aerogel insulation technology, which can continuously block heat transmission at temperatures of 1000°C, effectively preventing thermal runaway. Coupled with high-safety electrolyte technology, next-generation cartridge battery technology, and comprehensive fire-fighting equipment, this significantly inhibits the speed of heat spread and improves the cooling capability of multiple cells per unit area, ensuring that batteries do not cause explosions or fires due to thermal runaway, truly achieving "preventing issues before they arise."

Moreover, in battery accidents, manufacturing defects such as metal burrs, foreign materials, or poor coatings are significant contributors to thermal runaway incidents. To address this risk, Inpai employs cutting-edge production processes to ensure the intrinsic safety of its products. As one of the first batch of exceptional smart factories recognized by the Ministry of Industry and Information Technology—alongside notable companies like Xiaomi Auto and Li Auto—Inpai utilizes automotive-grade cell production lines and adheres to a lean production management system inherited from GAC, strictly controlling the manufacturing process. The facility is equipped with over 15 micro-distance demagnetization systems and more than 20 dust removal systems, maintaining a cleanliness standard of tens of thousands, with key positions achieving thousands-level cleanliness, ensuring "zero" foreign materials and "zero" burrs. With CCD AI visual inspection technology, Inpai features 1,170 visual observation points and 180 decision-making points, allowing for the detection of 20-micron defects in just 100 ms, achieving PPb-level defect control (one billionth defect rate), surpassing the traditional PPM standard and ensuring zero defective products, thus eliminating safety risks in battery quality.

Additionally, compared to traditional winding techniques, Inpai employs advanced stacking technology, resulting in longer product cycle life (increased by 10%), higher energy density (increased by 15%), and overall improved safety.

<b>Safety Has No Endpoint, Only Continuous Breakthroughs</b>
Today, driven by the dual forces of the energy revolution and the "dual carbon" strategic goals, energy storage safety is not just a technical issue but a core proposition concerning the sustainable development of the industry. According to Bloomberg New Energy Finance, by 2030, the global energy storage market is projected to exceed $1.2 trillion. It has also been reported that Inpai Battery has reached a collaboration with the National New Energy Storage Innovation Center to explore the introduction of automotive-grade multi-stress composite testing into the energy storage field, jointly creating typical demonstration application projects to promote high-quality development of energy storage technology and China's energy storage industry, building a new safety system for energy storage in China.

Inpai Battery's automotive-grade safety standards not only provide a reference for technical innovation in the industry but also, through its proactive verification safety philosophy and practices, drive the energy storage industry from a phase of "scale expansion" to a new stage of "quality leap." As noted by a project leader from a central enterprise, “Inpai’s testing system shows us another possibility for energy storage safety.” Beginning with the "Fully Charged Cell Twisting Test," Inpai Battery answers the industry's questions with "automotive-grade safety," providing a Chinese solution for the global energy storage industry's safety upgrade.