Analysis of the trend of the development of lithium battery

Source: 2020 - 03 - 28 then hits: time can be seen from the three kinds of power battery shell shape and the trend of the development of lithium battery dear friends, have you ever wondered why tesla power battery looks like no use. 5 batteries? Why general battery is like a piece of bread? Why nextev ES8 power battery like a mobile hard disk? According to the first question, according to industry rumours, initially tesla has just begun, can not find the battery supplier, panasonic and cylindrical battery keep tesla and fire, the development of the tesla, did not forget 'married' own princess, use panasonic battery until now, even the future. First of all, we must realize is three power lithium battery internal components and no different, they are lithium battery. Center is the difference between cylindrical cells and the main square in metal material for shell, and soft package lithium-ion batteries mainly of aluminum-plastic film shell. One by one: columnar suppliers: panasonic, SONY, Johnson controls application models: tesla whole series, the series of jianghuai IEV advantages: advanced production technology, the packaging cost is low, battery products with high yield and good heat dissipation performance lee: new energy cars common cylindrical battery looks like our daily use of no. 5. Battery, the battery has a long history, the production process is very old, has the international standard. When we talk about tesla, 21700, the figure is actually 21 mm by 70 mm. Another thing, because of its shape, when you have a lot of cylindrical cells in a row, can you make room for the heat, you can see the square cells should be no gap in the middle line. Tesla battery but the battery has a characteristic, single block of energy density is very low, to want the same capacity will have to take more batteries, plus must use metal shell, lead to weight a lot. Square battery suppliers: samsung, ningde era, national high-tech application models: a BMW i3, roewe ERX5, wei to automobile ES8, byd series, gac kei new energy transfer GE3 advantages: layout is sensitive, the custom can end, good safety lee: different monomers, difficult to unified standard battery type packing all the biggest characteristic is that it can be customized according to the end of the different models, slightly rough, that is to say, the main engine factory and suppliers can be a battery for a car planning layout scheme, but this disguised increased at the ends of the human capital; Another problem is that every car battery is different, formed many types of square batteries on the market at present, the technology is hard to work together. What do you think, assuming that you are a party, ready-made templates reach on the cover, or and their clients, always negotiate a customised version to talk about? Soft package battery suppliers: lg chemical, wu can technology application models: buick VELITE eQ 5, nissan leaf, chery, Beijing new energy advantages: light weight, high energy density lee: different monomers, standard is difficult to cooperate, mechanical strength different buick VELITE 6 mild package battery soft package is also very common in our daily life, such as mobile phone battery. It USES aluminum-plastic film as the packaging materials, obvious two batteries are lighter than the metal enclosure. However, the nature and not as good as the above two ways of protecting the battery. The future is the world of the soft package battery? The biggest advantages of soft package battery can be in the current skill levels improve the energy density of power battery. According to the calculation of high power lithium batteries, soft package cell battery 20% lighter than the same capacity of aluminum package, 50% higher than the same capacity of aluminum package battery. 19 years of subsidies policy remains unclear, but what is certain is that subsidies is closely related to the energy density of battery, the soft package battery has a huge advantage. Aluminum-plastic film localization is a difficult problem, then, why don't many manufacturers use soft package of batteries? As mentioned earlier, aluminum-plastic film is soft bag the biggest difference with the above two kinds of battery. After a single batteries assembled with aluminum-plastic film sealed and formation of the battery. Lu: su film is used to protect the contents. This kind of material is also very common in our daily life, such as packing capsule of the first question is, aluminum-plastic film is usually produced by Japanese manufacturers, DNP itself the market share of nearly 50% in Japan, the rest of the showa denko can also account for about 25%, the two also beyond their own technology standard.