Analysis of lithium battery price trends

Source: 2020 - 04 - 04 13:03 hits: falls in the price of the lithium ion battery is rapidly, the price advantage is more and more obvious from a performance point of view, lead-acid battery is obviously better than the lithium ion battery, nickel cadmium battery, nickel metal hydride batteries, such as major competitors, can be seen from table 2. Lithium ion batteries through performance advantages gradually expand the size of the market, the increase in demand as a direct result of the expansion of production capacity and manufacturing cost is reduced, thus further stimulating demand growth. In this way, lithium electricity industry started a virtuous cycle of development. While other secondary battery in 'market demand & rarr; Economies of scale and smaller & rarr; The rising cost & rarr; The market demand decline further 'in a vicious cycle. Lithium battery price change trend from lead-acid battery, nickel metal hydride battery and lithium ion battery price movements can be seen ( FIG. 2) In 2007, compared with nickel metal hydride batteries, lithium ion battery price performance than nimh batteries, absolute price is lower than 2009 nimh batteries. Compared with lead-acid batteries, the cycle life of lithium ion batteries are generally lead-acid battery for more than 2 times of the price down to 2014 lead-acid batteries 2 times or so. Two kinds of unit cell cycle life basically the same price, price advantage. At the same time, the price of the lead-acid battery has entered a rising channel, there is a decrease in the price of lithium ion battery is the space. Therefore, please see 2014 as a turning point, after that, instead of lead-acid batteries with lithium ion batteries will significantly speed up the process of. Lithium iron phosphate battery cycle life and the changing rule of the SOC, and significantly increased with the decreasing of SOC. If the SOC cycle life is set to 1, 100%, 90% of SOC is 1. 42 reached % SOC to 2. 98, 60 % SOC is 6. 62, 50 % SOC is 12. 28, 30 % SOC is 19. 44. 100% ~ 30% of SOC relative rate of life can be divided into four stages. The first phase of soc is 100% ~ 90%, change the slope is zero. 42. Soc for 0 ~ 60%, and changes the slope of 1. 56. Phase: soc is 60% ~ 50%, change slope is 5. 66; Soc 4:50 ~ 30% right, change slope is 3. 58. In addition, this experiment also found that the constant volume charge in 80% ~ 90% charged state of charge cut-off voltage variation trends have a certain relationship with the corresponding cycle life. Whether there is a corresponding relationship or what relevance need further experiment.