Lithium iron phosphate battery belongs to lithium ion secondary battery, and one main purpose is to use it as a power battery, which has great advantages over NI-MH and Ni-Cd batteries.
The lithium iron phosphate battery has high charge and discharge efficiency, and the charge and discharge efficiency can reach over 90% under the condition of discharge. The lead-acid battery is about 80%. The seven advantages of this type of battery are now listed in a variety of conditions:
(1) Long life
The long-life lead-acid battery has a cycle life of about 300 times, and ** is 500 times. The lithium iron phosphate power battery has a cycle life of more than 2,000 times, and the standard charge (5h rate) can be used up to 2,000 times. The same quality lead-acid battery is "new half year, old half year, maintenance and maintenance for half a year", up to 1 to 1.5 years, and lithium iron phosphate battery used under the same conditions, will reach 7 to 8 years. Comprehensive consideration, the performance price ratio will be more than 4 times that of lead-acid batteries. Figure 2 shows the relationship between the capacity of the FP053450A lithium iron phosphate battery and the number of cycles. It can be seen from the figure that when the number of cycles is more than 2000 times, it can still be charged to nearly 90% of the nominal capacity.
(2) Safe use
Lithium iron phosphate battery completely solves the safety hazard problem of lithium cobalt oxide battery and lithium manganate battery. Lithium cobaltate battery and lithium manganese oxide battery will explode under strong collision, posing a threat to consumers' life safety. The lithium iron phosphate battery undergoes rigorous safety testing and will not explode even in the worst traffic accidents.
(3) Can charge and discharge quickly with large current
Under the dedicated charger, the battery can be fully charged within 1.5 minutes of 1.5C charging, and the starting current can reach 2C, while lead-acid batteries do not have this performance. Figure 3 shows the discharge characteristics of a certain type of lithium iron phosphate battery at different discharge rates. The minimum discharge rate given in the figure is 0.2 C, and the ** discharge rate is 10 C. Six different discharge rates form a set of discharge curves. It can be seen from the figure that no matter which kind of discharge rate, the discharge voltage is stable during the discharge process, and remains basically unchanged. Only when the discharge voltage is terminated, the curve bends downward and the discharge capacity reaches 2000mAh. Bending, at 2500 mAh, the curve has a significant curvature. In the discharge rate range of 0.2 to 10C, the output voltage mostly changes in the range of 2.7 to 3.2V. This shows that the electric has good discharge characteristics.
The discharge curve of a lithium iron phosphate battery with a model capacity of about 5500 mAh under different temperature conditions (from -20 ° C to +60 ° C) is shown in Fig. 4. If the discharge capacity is I00% at 25'C, the discharge capacity is slightly greater than 100% when the temperature is higher than 40 °C. When the temperature is lower than 25 °C, the discharge capacity decreases, and at -20 °C, the discharge capacity decreases. Up to 50%.
(4) High temperature resistance
Wide operating temperature range (-20 ° C ~ 75 ° C), with high temperature resistance. The lithium iron phosphate battery has an electric heating peak of 350 ° C to 500 ° C, while the lithium manganese oxide battery and the cobalt acid Zen battery have an electric heating peak of only about 200 ° C.
(5) Large capacity
The voltage level commonly used in the communication industry battery is 12V; the battery pack voltage level used with the DC switching power supply system is 24V, 48V; the battery pack voltage level used with the UPS AC power system is 24V, 36V, 48V, 96V, 240V. 384V, etc.; commonly used battery pack capacity levels range from 25Ah, 65Ah, 100Ah, 150Ah, 200Ah, 500Ah, 1000Ah. Click to view the company's various large-capacity lithium iron phosphate battery outline drawings. By connecting 12V or 48V battery modules in series, a 240V, 336V, and 384V battery pack can be formed to meet the power requirements of the UPS AC power system and the 240V/336V high voltage DC power system (HVDC).
(6) No memory effect Rechargeable batteries are often operated under conditions of full discharge, and the capacity will quickly fall below the rated capacity. This phenomenon is called the memory effect. Like nickel-metal hydride and nickel-cadmium batteries, there is memory, and lithium iron phosphate batteries do not have this phenomenon. No matter what state the battery is in, it can be used with charging, no need to discharge electricity before recharging.
(7) Green environmental protection
Lithium iron phosphate batteries do not contain any heavy metals or rare metals (Ni-MH batteries require rare metals). Non-toxic (SGS certified), non-polluting, in line with European RoHS regulations, is a green battery. Lead-acid batteries have a large amount of lead. If they are disposed of improperly after disposal, they will cause secondary pollution to the environment, and lithium iron phosphate materials are not polluted during production and use. Therefore, lithium iron phosphate batteries are listed as "fifteen". "The "863" National High-Tech Development Plan during the period has become a national key support and encouragement development project.
The lithium iron phosphate battery has high charge and discharge efficiency, and the charge and discharge efficiency can reach over 90% under the condition of discharge. The lead-acid battery is about 80%. The seven advantages of this type of battery are now listed in a variety of conditions:
(1) Long life
The long-life lead-acid battery has a cycle life of about 300 times, and ** is 500 times. The lithium iron phosphate power battery has a cycle life of more than 2,000 times, and the standard charge (5h rate) can be used up to 2,000 times. The same quality lead-acid battery is "new half year, old half year, maintenance and maintenance for half a year", up to 1 to 1.5 years, and lithium iron phosphate battery used under the same conditions, will reach 7 to 8 years. Comprehensive consideration, the performance price ratio will be more than 4 times that of lead-acid batteries. Figure 2 shows the relationship between the capacity of the FP053450A lithium iron phosphate battery and the number of cycles. It can be seen from the figure that when the number of cycles is more than 2000 times, it can still be charged to nearly 90% of the nominal capacity.
(2) Safe use
Lithium iron phosphate battery completely solves the safety hazard problem of lithium cobalt oxide battery and lithium manganate battery. Lithium cobaltate battery and lithium manganese oxide battery will explode under strong collision, posing a threat to consumers' life safety. The lithium iron phosphate battery undergoes rigorous safety testing and will not explode even in the worst traffic accidents.
(3) Can charge and discharge quickly with large current
Under the dedicated charger, the battery can be fully charged within 1.5 minutes of 1.5C charging, and the starting current can reach 2C, while lead-acid batteries do not have this performance. Figure 3 shows the discharge characteristics of a certain type of lithium iron phosphate battery at different discharge rates. The minimum discharge rate given in the figure is 0.2 C, and the ** discharge rate is 10 C. Six different discharge rates form a set of discharge curves. It can be seen from the figure that no matter which kind of discharge rate, the discharge voltage is stable during the discharge process, and remains basically unchanged. Only when the discharge voltage is terminated, the curve bends downward and the discharge capacity reaches 2000mAh. Bending, at 2500 mAh, the curve has a significant curvature. In the discharge rate range of 0.2 to 10C, the output voltage mostly changes in the range of 2.7 to 3.2V. This shows that the electric has good discharge characteristics.
The discharge curve of a lithium iron phosphate battery with a model capacity of about 5500 mAh under different temperature conditions (from -20 ° C to +60 ° C) is shown in Fig. 4. If the discharge capacity is I00% at 25'C, the discharge capacity is slightly greater than 100% when the temperature is higher than 40 °C. When the temperature is lower than 25 °C, the discharge capacity decreases, and at -20 °C, the discharge capacity decreases. Up to 50%.
(4) High temperature resistance
Wide operating temperature range (-20 ° C ~ 75 ° C), with high temperature resistance. The lithium iron phosphate battery has an electric heating peak of 350 ° C to 500 ° C, while the lithium manganese oxide battery and the cobalt acid Zen battery have an electric heating peak of only about 200 ° C.
(5) Large capacity
The voltage level commonly used in the communication industry battery is 12V; the battery pack voltage level used with the DC switching power supply system is 24V, 48V; the battery pack voltage level used with the UPS AC power system is 24V, 36V, 48V, 96V, 240V. 384V, etc.; commonly used battery pack capacity levels range from 25Ah, 65Ah, 100Ah, 150Ah, 200Ah, 500Ah, 1000Ah. Click to view the company's various large-capacity lithium iron phosphate battery outline drawings. By connecting 12V or 48V battery modules in series, a 240V, 336V, and 384V battery pack can be formed to meet the power requirements of the UPS AC power system and the 240V/336V high voltage DC power system (HVDC).
(6) No memory effect Rechargeable batteries are often operated under conditions of full discharge, and the capacity will quickly fall below the rated capacity. This phenomenon is called the memory effect. Like nickel-metal hydride and nickel-cadmium batteries, there is memory, and lithium iron phosphate batteries do not have this phenomenon. No matter what state the battery is in, it can be used with charging, no need to discharge electricity before recharging.
(7) Green environmental protection
Lithium iron phosphate batteries do not contain any heavy metals or rare metals (Ni-MH batteries require rare metals). Non-toxic (SGS certified), non-polluting, in line with European RoHS regulations, is a green battery. Lead-acid batteries have a large amount of lead. If they are disposed of improperly after disposal, they will cause secondary pollution to the environment, and lithium iron phosphate materials are not polluted during production and use. Therefore, lithium iron phosphate batteries are listed as "fifteen". "The "863" National High-Tech Development Plan during the period has become a national key support and encouragement development project.
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