Briefly describe the technology of Japan's seven major lithium battery companies

　　Although Japan is declining in the proportion of the global lithium battery market, Japan has always firmly occupied the leading position in the high-end lithium battery market, and its lithium battery technology is also the vane of the entire industry.

　　Although Japan is declining in the global lithium battery market, Japan has always firmly occupied the leading position in the high-end lithium battery market, and its lithium battery technology is also the vane of the entire industry.　　1. Overview of the technical route of Japanese lithium battery companies

　　2. Details of the technical routes of each enterprise　　1. Panasonic-Sanyo Electric Co., Ltd. has researched and developed solid solution cathode materials in which lithium manganate is doped with elements such as nickel and aluminum, which can be used as battery cathode materials. At present, the cathode materials that have been developed include lithium nickel cobalt manganate, lithium nickel cobalt aluminate, etc., and they have been applied on a large scale.　　 In addition, in order to solve the problem of low thermal stability and safety caused by nickel oxide, a nano-coating treatment was carried out on the surface of the positive electrode material.　　 Anode materials 　　 currently mainly use carbon materials, but at the same time actively develop silicon alloy-based anode materials, and some applications have already been realized.　　2, NEC-AESC　　 improve the low energy density of lithium manganate materials by doping nickel, aluminum and other elements. In fact, the route is similar to Panasonic. However, NEC looks bolder and is developing nickel-diamond alloy materials with twice the capacity to replace manganese materials.　　 At present, the application of this new type of cathode material has solved the problem of battery durability. NEC is actively developing electrode materials dedicated to power lithium batteries, which have already been applied.　　3, Hitachi, 　　 anode material, 　　 Hitachi anode material development currently has two routes: 　　1. Improve on the basis of carbon materials; 　　2. Develop a mixture of silicon alloy materials and carbon materials SiO-C.　　At the same time, a new type of copper foil with high elastic limit stress and excellent processing performance was developed as an electrode material. "Diaphragm" In the area of diaphragm, a ceramic diaphragm material resistant to high temperatures of 200°C has been developed, which is a porous membrane made of ordinary polyolefin (Polyolefin) coated with plate-shaped inorganic particles. Currently, the diaphragm material has been applied.　　4, Toshiba　　Toshiba mainly increases the energy density of the battery by increasing the particle density of the positive electrode material. To optimize the performance of the manganese-titanium battery, Toshiba uses an electrolyte with a higher ignition point and a separator with excellent heat resistance.　　5, INSURANCE 　　 INSURANCE firmly follows the lithium manganate route, and its lithium battery technology is in the leading ranks among all Japanese companies. At present, the power battery product data provided by Inexis is good, but it still needs to undergo mass production inspection.　　6, GS Yuasa 　　 GS Yuasa is actively advancing on the two routes of lithium manganate and lithium iron phosphate. The main products of lithium manganate are EH6 and LEV50, and the main products of lithium iron phosphate are LEV25 and LIM40.　　7, Sony　　 While Sony is developing lithium iron phosphate batteries, it is also actively developing power batteries of lithium cobalt oxide + tin-based alloy materials. Sony’s approach is to “coat the surface of the particles of lithium cobalt oxide with a thickness of 0.1 to 1 pm”. The cathode material is a mixture of tantalum cobalt oxide and ternary materials, and ceramic separators are used to improve safety.