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Lithium Iron Phosphate Batteries For Communications Industry

Author: Source: Datetime: 2018-05-11 12:18:30
Due to the more efficient and energy-saving than lead-acid batteries, lithium iron phosphate batteries are gradually coming into sight. At present, lithium iron phosphate batteries are mainly used in electric vehicles and have gradually entered the communications industry in the past two years. Of the three major operators, China Mobile has relatively more applications for lithium iron phosphate batteries, and China Telecom and China Unicom are more cautious. The main reasons for the large-scale use of lithium iron phosphate batteries are high prices and concerns about reliability.

From the performance point of view, lithium iron phosphate battery life is much longer than lead-acid batteries, lead-acid batteries, the average cycle life in the charge and discharge 300 times, while the iron-lithium battery can reach more than 2,000 times. In addition, iron-lithium batteries are safer, will not explode, and can achieve rapid charging and discharging of large currents. At the same time, the lithium iron phosphate battery is more resistant to high temperatures, and the electric heating peak can reach 350°C to 500°C. In practical applications, the use of a battery incubator can be eliminated.
At the end of 2010, the China Mobile Group's Henan Provincial Company initiated the centralized procurement bidding for lithium iron phosphate batteries, which is the first centralized tender for this product within China Mobile. Henan Mobile Network Operation and Maintenance Department Zhang Le introduced that Henan Mobile had previously conducted a small-scale trial of lithium iron phosphate batteries, “good results”. It is understood that the tender for the lithium iron phosphate battery is actually commissioned by China Mobile Henan Mobile, the purchase of the product will not be limited to the application in Henan Mobile.

Relevant agencies said that according to their previous market research, if China Mobile's existing ordinary lead-acid batteries are all replaced with lithium iron phosphate batteries, the market size of up to 800 billion yuan.
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“At least two to three years of trials are required.” A person in charge of a battery manufacturer who was shortlisted for Henan Mobile’s bidding said, “If the trial after China Mobile's centralized purchase is effective, it will start large-scale after 2-3 years. Application; if the trial results are not ideal, then it will be dragged back."

At present, the primary factor affecting the large-scale application of lithium iron phosphate batteries is price. The current mainstream lithium iron phosphate battery on the market is two to three times more expensive than lead-acid batteries, and even more than five times. If the lithium-iron battery can really reach the service life of 10 years, then the return on investment can be considered relative to the life span of 2-year lead-acid battery. But in practice, operators still feel that the current price is too expensive.

"If the price is twice as high as a lead-acid battery, it is not acceptable if it is higher," said Du Min, product support office of the China Telecom Group's network department. There are several provincial companies in China Telecom trialing lithium iron phosphate batteries. Relatively speaking, the scale is not too large. Between hundreds and one thousand groups, the capacity of each group does not exceed 50 ampere-hours.

In addition to the price, there is no sufficient actual data support, which is another important reason why operators are temporarily reluctant to use lithium iron phosphate batteries on a large scale.

Du Min said that when a new product is put into large-scale use, it must go through at least three stages. The first is that there can be no theoretical problem. Second, there is a need for data support for aging tests. Third, a live network trial that requires a certain amount of time and scale.

In theory, lithium iron phosphate battery is safer and more reliable than lead-acid battery, and the cycle charge and discharge life can reach 10 years, which can solve the problem of high pollution and long service life. However, in the data of the aging test, the current lithium iron phosphate battery can not provide enough reliable data support. As for the existing network applications, the longest trial time for lithium iron phosphate batteries in the communications industry is also about two years, and it cannot be concluded that they can be used on a large scale.
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