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Domestic power of lithium battery three big worries

June 22,, in Beijing, the reporter interviewed a professional exhibition-the 2011 tenth session of China international battery laptop battery products and raw materials, spare parts, mechanical equipment exhibitions ", first have the opportunity to further understand the electric car in China's "great leap forward" controversial in the lithium iron phosphate battery (lithium batteries or lithium ion battery professional name) from raw materials to finished products to the whole process of the application, and in its tangle behind is not clear, still has to China enterprise threat great patent disputes.

Relevant patents need to clarify

In recent years, the media lithium ion battery anode materials-of the lithium iron phosphate of a patent dispute reported to the chaos, a very different versions of some key issues, and even individual enterprise for selfish interests concept than fish in troubled waters, Toshiba PA3331U-1BAS Battery has set up a file in the to a considerable degree to the public caused the misleading. The exhibition, journalists and several enterprise interview, and the related technical problems consult the domestic famous experts, China electrochemical battery industry, executive director of the association of Harbin industrial university professor HuXin countries. The content of the need to clarify as follows:

First, as the lithium ion battery of the positive materials (anode materials for graphite), lithium iron phosphate is the core technology of the main have two: one is in the process of synthesis of lithium ion was wrapped up one layer carbon (or not), the abbreviation "with the electrical conductivity include apply carbon technology"; 2 it is as lithium iron phosphate production process "carbon reduction technology." hot The two technologies are the patent for Canada Phostech all. The us house lithium ion battery manufacturers are also mentioned the same patent claims, Toshiba PA3098U-1BAS Battery but are in Phostech win the lawsuit to an end. At present, only the leading global lithium ion battery manufacturers-the United States A123 and Phostech lawsuits has not yet final.

Second, Canada and the United States of lithium iron phosphate implementation of patent protection, but Phostech applied for patent protection in Europe was rejected. This also means that, with the United States outside of lithium iron phosphate producers if don't get Phostech patent license, and its products into the market with the United States will face claim risk. Toyota prius hybrid accumulative total has already sold over 2 million vehicles, the key points in the market with the United States, Toshiba PA3084U-1BAS Battery use is the nimh batteries and not the lithium ion battery, is very worried that if Toyota had happened a patent dispute, may lead to the huge tort claims, the big trouble.

Third, Phostech has set up a file in the China apply for registration and obtain approval for Chinese enterprise, set up around the patent barriers not the past. In 2010, China's battery industry association of China university of politics and law to the country by the patent re-examination board to hold "Phostech lithium iron phosphate battery" patent puts forward the invalid request, is still pending. But in the results came in, China enterprise impossible before waiting for them in the future, or are exempt from patent fees or be reimbursed for patent.

Fourth, individual local enterprises in order to circumvent the patent, says Phostech lithium iron phosphate changed the formula and the production process is lying to ourselves. The patent Phostech lithium iron phosphate by its exclusive crystal structure and molecular formula composition, to achieve the guard, the strict patent registered in China include the core patent and the patent edge, the 250 many patents, China enterprise can't breakthrough.Toshiba PA3399U-1BAS Battery Change the formulation and production process is possible, but the products must is not lithium iron phosphate.

The question has been the subject of "battery" byd iron by industry authority is that lithium iron phosphate battery, change a name just to avoid patent. The exhibition, byd technical personnel to the reporter said, the byd clarification "iron battery" is in the lithium iron phosphate added cobalt elements, full name is "iron phosphate cobalt lithium battery", it is not only avoid the lithium iron phosphate battery patent, but also increased the lithium ion battery performance. The authorities confirmed in lithium iron phosphate, adding other elements really can avoid patent, but material performance will only drop will not increase.

Lithium ion battery power: rivalry raw materials and equipment level

Be in China at present, the lithium ion battery is local enterprises involved in the first choice of the electric car power battery. And also widely used lead-acid battery and nimh batteries, compared the lithium ion battery energy storage effect is better, more energy density, circulation longer life, charging no memory effect more wonderful, basic can meet to volume, long life, high demands power of electric vehicle demand.

Reporters from the exhibition to realize, power lithium ion battery performance depends on two factors: one is the quality of lithium iron phosphate; Toshiba PA3250U-1BAS Battery 2 it is lithium ion battery production equipment.

According to HuXin countries introduced professor, the quality of lithium iron phosphate depends on whether the manufacturer will original technology, fire and synthesis conditions understanding whether stable, a slightly different will affect the consistency of the single cells. At present domestic do lithium iron phosphate enterprise a lot, but its quality how? Domestic lithium iron phosphate per ton 16-170000 yuan, every tons of import of lithium iron phosphate is 320000 yuan, which is a times as much about that.

The lithium ion battery production process is extremely complex, the necessary equipment and testing instrument of 100 DuoGe types. From the exhibition to see, in addition to the individual test instrument, the current domestic enterprise basic can meet all equipment requirements, but the key equipment or imported and reliable. For instance in the core production links, anode materials must be uniform coating is is to guarantee the monomer battery consistency of key working procedure, Toshiba PA3356U-1BAS Battery domestic equipment will not requirements; The import of the diaphragm is nanoscale coating thickness, only for 30 to 40 microns, domestic equipment fundamental can't do; And in single cells, electrolyte into the link, the workshop environment requires not only constant humidity and temperature, even more, the super clean, electrolyte mix in a grain of dust, it may lead to short circuit batteries.

At present, worldwide, the commercialization of the early electric car and with plug hybrid high price, the main reason is the lithium ion battery manufacturing cost doesn't go down, the largest investment is a piece of equipment. According to information, byd is shenzhen new power for a lithium ion battery production base, all equipment imported from Japan, with a total investment of usd 50 DuoGe, purpose of which is to keep in the domestic electric car market leading position. But the problem is, the next 10 years, the electric car commercial are not going to have a big breakthrough, so big input when can recycle cost?

The exhibition, from local enterprises the display of the lithium iron phosphate positive materials, lithium ion battery manufacturing equipment Toshiba PA3291U-1BAS Battery and finished product to see, a new industry are on the rise, but governors regime, low repetitive construction is also very obvious signs of China, which reflects the electric car boom of the enterprise in restless.