The advantages of lithium iron phosphate batteries: high safety, long life, good environmental protection and low cost. Disadvantages of lithium iron phosphate batteries: low energy density, poor low temperature performance and. the disadvantages of ternary lithium batteries Advantages: high energy density, good low temperature performance and high charging and discharging efficiency. Disadvantages of ternary lithium batteries: poor safety, short life and high cost.
1. Advantages of lithium iron phosphate batteries
1. High safety: Lithium iron phosphate batteries have good thermal stability and are not prone to safety accidents such as explosions or explosions. fires. .
2. Long service life: The service life of lithium iron phosphate batteries is long, generally reaching more than 2,000 times, whileThe lifespan of ternary lithium batteries is generally about 500-1000 times.
3. Good environmental protection: Lithium iron phosphate batteries do not contain harmful substances and are environmentally friendly.
4. Low cost: Compared to ternary lithium batteries, the manufacturing cost of lithium iron phosphate batteries is lower.
2. Disadvantages of lithium iron phosphate batteries
1. Low energy density: The energy density of lithium iron phosphate batteries is relatively low and less energy can be stored in the same volume. .
2. Poor low temperature performance: Lithium iron phosphate batteries have great attenuation capacity in low temperature environments, especially when charging or discharging in low temperature environments.
3. Advantages of ternary lithium batteries
1. Haute energy density: The energy density of ternary lithium batteries is relatively high, and more energy can be stored in the same volume.
2. Good low temperature performance: Ternary lithium batteries have less capacity attenuation in low temperature environments and have strong adaptability.
3. High charging and discharging efficiency: The ternary lithium battery has high charging and discharging efficiency, fast charging speed and large discharge current.
IV. Disadvantages of ternary lithium batteries
1. Poor safety: Ternary lithium batteries are prone to thermal runaway in high temperature environments, which can cause safety accidents.
2. Shorter lifespan: Compared to lithium iron phosphate batteries, ternary lithium batteries have a shorter lifespan.
3. High cost :the manufacturing cost of ternary lithium batteries is relatively high.
Lithium iron phosphate battery usage scenarios
1. Electric Vehicles: The safety and lifespan of lithium iron phosphate batteries make them ideal for electric vehicles. . The use of lithium iron phosphate batteries in electric vehicles can reduce the occurrence of battery failures and safety accidents, extend battery life, and improve vehicle reliability and safety.
2. Energy storage system: Lithium iron phosphate battery has the characteristics of high energy density and long cycle life, which makes it widely used in energy storage systems. For example, a photovoltaic solar energy storage system can use lithium iron phosphate batteries to store generated solar energy for use.read at night or on cloudy days.
3. Electric bicycles and electric motorcycles: Lithium iron phosphate batteries have a long service life and can meet the needs of long-term use of electric bicycles and electric motorcycles. In addition, the safety of lithium iron phosphate batteries also makes these batteries Electric transportation more reliable and safer.
The advantages of lithium iron phosphate batteries are high operating voltage, long life and good safety performance; disadvantages are low energy density and poor resistance to low temperatures; ternary lithium batteries The advantage is smaller volume and higher capacity density; the disadvantage is poor high temperature resistance and decomposes at 250-300℃.
The lithium iron phosphate battery is a lithium-ion battery that uses bedhium iron phosphate as the positive electrode material and carbon as the negative electrode material. The advantages are high operating voltage, long life, good safety performance, low self-discharge rate, no memory effect and low production cost. The disadvantages are low energy density, poor resistance to low temperatures, and a large gap between high and low temperatures. charging and discharging rate at low temperature.
Ternary lithium batteries generally contain ternary cathode materials consisting of lithium-nickel-cobalt manganate or lithium-nickel-cobalt aluminate as the cathode material. The most commonly used ternary lithium batteries are nickel salts, cobalt salts and manganese salts as raw materials. .composite as positive electrode. The advantages are smaller size, higher capacity densitys, low temperature resistance and better cycle performance. The disadvantage is that it has poor resistance to high temperatures and decomposes at 250-300°C. The chemical reaction of ternary lithium materials is particularly strong.
Lithium iron phosphate batteryCharging and discharging principle
The charging and discharging reaction of the battery to lithium iron phosphate is located in the two phases of LiFePO4 and FePO4 During the charging process, LiFePO4 gradually detaches from the lithium ions to form FePO4. During the discharge process, lithium ions are integrated into FePO4 to form LiFePO4. When the battery is charging, lithium ions migrate from the lithium iron phosphate crystal to the crystal surface, under the action of electric field strength, they enter the electrolyte, then pass through the separator, and then migrate to the surface of the crystalgraphite. through the electrolyte, then are integrated into the graphite network.
At the same time, electrons flow to the aluminum foil collector of the positive electrode through the conductor, flow to the copper foil current collector of the negative electrode of the battery through the tab, the positive pole of the battery. , the external circuit, the negative pole and the tab of the negative electrode, then it passes through the conductor to the negative graphite electrode to balance the charge on the negative electrode. After the lithium ions are deintercalated from the lithium iron phosphate, the lithium iron phosphate is converted to iron phosphate.