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China's Lithium-Ion Battery Industry - Solving Security Concerns

You will find several aspects to Li-ion battery protection throughout its layout processes, including safe battery structure, secure raw resources, protective functions and safety certifications. When interviewed by China Electronics News, Mr Su Jinran, deputy chief engineer of Tianjin Lishen Battery Co Ltd, mentioned that item security began in product design and style, for that reason selecting the appropriate electrode materials, separators and electrolytes are the initial priority for secure battery pattern. For battery anode components, ternary resources, manganese lithium and lithium iron phosphate, which have been widely employed in battery pattern and yielded satisfactory performance, are additional secure than conventional lithium cobaltate and nickel lithium.

Su stated that at present, the R&D and manufacturing of anode, cathode and electrolyte components have established sufficient scales in China, basically capable of satisfying the pattern and manufacturing requirements of Li-ion batteries. Furthermore, the research on some secure coating materials has started to be commercialized, providing a new aspect for improving Li-ion battery safety, but China still needs to invest far more and follow up on R&D and applications in this area.

An executive from the mobile energy business of Sanyo Electric Co., Ltd in China commented that when it comes to safety of Li-ion battery, all parts and materials applied for making the battery play important roles. They are therefore trying to put together parts and components to ensure its safety as a whole. Furthermore, in order to utilize parts and materials, it is important to employ advanced industrial production technologies and quality control technologies when thinking about protection improvement. "To further ensure Li-ion battery security, we need to jointly consider batteries and the electronic equipment that use them. Meanwhile, the issue of battery safety has to be addressed by electronic equipment manufacturers and battery manufacturers together." mentioned the executive.

Innovation-based standard setting

Due to the complexity in Li-ion battery security mechanism, especially the impact on protection after re-using the batteries, the process of understanding Li-ion battery security 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 Li-ion battery protection 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, mentioned that Li-ion batteries currently could be divided into energy types and power types. As these two products have differences in supplies and style 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 Li-ion batteries applied 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 Li-ion battery protection standards for these two distinctive types.

Numerous industry experts agreed that standard setting of Li-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.

Li-ion battery for vehicle use

Because of its light weight and high energy density, Li-ion battery's application areas are expanding in China, and it is hoping that Li-ion technology could be heavily used in hybrid vehicles and electric vehicles, which could further increase Li-ion battery's market penetration. As a result, developing Li-ion batteries for vehicle use has become a focus for several Chinese Li-ion battery manufacturers. An analyst from China Academy of Sciences, Mr Huang Xuejie, pointed out that although China is now the second largest Li-ion manufacturing country only behind Japan, it is not yet a strong country in this field. Many small-size batteries in China are still produced manually, resulting in varied product quality and fierce price competition. Commercialisation of power type batteries is till at an early stage in China, and there is still a vacuum for Li-ion batteries which could last 15 years on hybrid electric cars, as well as their key supplies and technologies.

As you can find high technical barriers for producing high end products such as vehicle-use Li-ion batteries, experts are calling for the cooperation between R&D, engineering technologies and management specialists. And in order to improve the technical level of China's battery industry, the government should also give assistance and establish expertise spreading mechanism for the industry.

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