China's Lithium-Ion Battery Industry - Fixing Safety Concerns
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Written by: johnsonjia
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Date: Thu, 26 Jan 2012 |
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There are lots of aspects to Li-ion battery protection during its design and style processes, which include protected battery construction, risk-free uncooked components, protecting functions and safety certifications. When interviewed by China Electronics Information, Mr Su Jinran, deputy chief engineer of Tianjin Lishen Battery Co Ltd, claimed that product basic safety commenced in solution design, as a result deciding upon the correct electrode resources, separators and electrolytes would be the initially priority for harmless battery layout. For battery anode products, ternary elements, manganese lithium and lithium iron phosphate, that have been widely employed in battery style and design and yielded satisfactory operation, are definitely more secure than classic lithium cobaltate and nickel lithium.
Su reported that at present, the R&D and manufacturing of anode, cathode and electrolyte resources have established sufficient scales in China, basically capable of satisfying the style and design and manufacturing requirements of Li-ion batteries. Furthermore, the research on some safe coating supplies has started to be commercialized, providing a new aspect for improving Li-ion battery safety, but China still needs to invest additional 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 basic safety of Li-ion battery, all parts and resources utilised for making the battery play important roles. They are thus trying to put together parts and components to ensure its basic safety as a whole. Furthermore, in order to utilize parts and resources, 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 security has to be addressed by electronic equipment manufacturers and battery manufacturers together." claimed the executive.
Innovation-based standard setting
Due to the complexity in Li-ion battery basic safety mechanism, especially the impact on basic safety 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, like experimental verification works.
Senior engineer from China Electronics Standardization Institute, Mr Sun Chuanhao, said that Li-ion batteries currently could be divided into energy types and power types. As these two products have differences in materials and style and design structures, their testing methods and requirements are dissimilar, even under the same basic safety conditions. The so-called portable batteries belong to the energy type, which include 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 basic safety standards for these two distinctive types.
Quite a few 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 quite a few 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. Several small-size batteries in China are still produced manually, resulting in varied merchandise 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 components and technologies.
As there are actually 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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