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China’s Lithium-Ion Battery Industry – Solving Safety Concerns

64 Published by admin Oct 24,2018

There are many aspects to Lithium-ion battery safety throughout its design processes, including safe battery structure, safe raw materials, protective functions and safety certifications. When interviewed by China Electronics News, Mr Su Jinran, deputy chief engineer, said that product safety began in product design, therefore selecting the right electrode materials, separators and electrolytes are the first priority for safe battery design. For battery anode materials, ternary materials, manganese lithium and lithium iron phosphate, which have been widely used in battery design and yielded satisfactory performance, are more secure than traditional lithium cobaltate and nickel lithium.

Innovation-based standard setting

Due to the complexity in Lithium-ion battery safety mechanism, especially the impact on safety after re-using the batteries, the process of understanding Lithium-ion battery safety and setting its standards should be gradual and progressive. And the development and application of external control techniques should also be considered. Su suggested that as setting Lithium-ion battery safety standards is a highly technical job, both standard setting professionals from battery standardisation bodies and technical specialists from the battery industry, users and electronic control areas should participate in the process, including experimental verification works.

Senior engineer from China Electronics Standardization Institute, Mr Sun Chuanhao, said that Lithium-ion batteries currently could be divided into energy types and power types. As these two products have differences in materials and design structures, their testing methods and requirements are dissimilar, even under the same safety conditions. The so-called portable batteries belong to the energy type, including Lithium-ion batteries used in mobile phones, laptops, digital cameras and video cameras, while the power type battery is for power tools, electric bikes and electric vehicles. Sun suggested authorities should introduce separate Lithium-ion battery safety standards for these two distinctive types.

Many industry experts agreed that standard setting of Lithium-ion battery in China should be built on the foundation of independent innovation, but also need to learn and refer to international standards such as IEC, IEEE and UL.

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