What kind of future batteries will be the main body of the lithium battery?

Source: 2020 - 04 - 01 'hits: time in the future which will be the main body of a lithium-ion battery, a battery square, cylindrical, flexible packaging? 1. In 2019 different ways of packing capacity analysis center concept: the current domestic market, the aluminum shell have absolute advantages, the main reason for the CATL and byd head effect of leading enterprises; Domestic cylinder liner and soft package battery business skills to carry out the relative lag, the second line, compared to many skills and enterprise less its installed capacity, heavier side aluminum shell installed capacity of 1. Square aluminum shell has absolute advantage in 2019 total vehicle battery installation of about 62. 2GWh; The installation of different packaging methods of cell state are shown in table 1. Overall, square aluminum battery capacity of landslide, the installed capacity of up to 52. 6 GWH, accounting for about 85% of the total capacity of 10 times that of flexible packaging, 13 times of cylinder. 2. Leading enterprises leading effect is obvious lithium iron phosphate battery with a total installed capacity of 20, 2019. 24 GWH, which accounts for 92 square aluminum shell. 6%. The first is shown in figure 1 a few products of the enterprise. TOP4 enterprise aluminum shell LFP battery with a total installed capacity of 17. 7 GWH, accounting for 87% of the lithium iron phosphate battery with a total installed capacity. Triple the total installed capacity of 40. 53 GWH, mainly in figure 2 a few companies products. TOP5 enterprise's total installed capacity of 34 GWH, accounting for 84% of the triple a total installed capacity. During this period, wu can only science and technology enterprise is given priority to with soft package way, several other companies Israel aluminum shell technology road. 3. Domestic soft bag, bag products is relatively backward now square aluminum shell terncore need energy density as shown in table 2, up to 238 wh/Kg, the minimum of 213 wh/Kg; In principle, the cylinder and the energy density of the soft bag slightly higher than the square aluminum shell. Under the same data system, flexible packaging of high energy density of 40 wh/Kg, higher energy density cylinder 20 wh/Kg. And battery pack after forming, due to the low efficiency, its energy density and the soft bag and cylinder are basically the same. But, in fact, the domestic soft packing and cylindrical battery energy density is relatively low. In table 3 and table 4 shows the domestic soft packing and cylindrical triple top 10 energy density of the product. Can be found that most of the soft cladding is equivalent to 200 - 210 wh/Kg square aluminum shell; In addition to a handful of products, basically the equivalent of 200 - cylindrical batteries 215 wh/Kg level square aluminum shell. Far behind the square aluminum shell development level of the battery. 4. Most peripheral enterprises have certain problem although skill development relative lag, but still can meet the market demand. With mid-range models ( A0 / grade a suv, a grade cars) As an example, a can density is 140-2019 160wh /Kg( See figure 3) 。 Basically met the soft bag and cylindrical battery, many secondary aluminum battery can satisfy enterprise. Due to the flexible packaging, secondary aluminum battery, cylindrical battery enterprise installation quantity is little, the author thinks that there are mainly the following several factors: 1) Skill level is relatively backward. Although the current energy density can satisfy the market demand, but missed the stick a single time ( General than 6 - ahead of time 12 months) ; 2) The uncertainty of auto enterprise product order, or car companies. Some car companies forecast order, for example, has achieved some battery enterprises total production capacity, but the change of the models after the notification. Some auto companies even severe money problems or equity attack, such as the tiger, lifan, etc; 3) The problem of its own cells. Most battery enterprises exist serious money problems, the consistency problem of products, product qualified rate, etc. Although the state plan in line with market demand, but the state does not conform to the actual products production conditions; 4) Because the new energy passenger car is still the main purpose of the taxi, time-sharing about car rental and net, existence of owner specified battery supplier, this situation is more conducive to leading enterprises.