The advantages of ternary lithium batteries are: smaller size, higher capacity density, low temperature resistance and better cycle performance. They constitute the mainstream of new energy passenger vehicles. Disadvantages: poor thermal stability, will decompose at 250-300°C, and the chemical reaction of lithium ternary materials is particularly strong. Once the oxygen molecules are released, the electrolyte burns rapidly under the action of high temperature, resulting in an explosion.
Ternary lithium battery, also known as "ternary lithium polymer", refers to a lithium battery using nickel-cobalt manganate or nickel aluminate. nickel-cobalt as positive electrode material. Ternary lithium batteries are widely used in new energy vehicles due to their smaller size, their higher capacitance density and their low temperature resistance. For example, we know of Tesla, which uses ternary lithium batteries in all its models.
The lifespan of a ternary lithium battery is 2,000 charge and discharge cycles. If you count one charge per day, it can last more than five years. However, in practice, there is a difference between usage and theory.
After 1,000 charge and discharge cycles, the ternary lithium battery has actually decayed by 50%, meaning it can only go half its original mileage after being fully charged. So how to avoid this situation? Charge it when you're using it and recharge it when it's off. Additionally, an excellent battery management system can also slow down the degradation of ternary lithium batteries.
There is no ternary lithium iron battery, itis a ternary lithium battery.
Advantages:
Ternary lithium battery: high energy ratio, high voltage, good power characteristics, but poor safety. Good temperature range;
Lithium iron phosphate battery: relatively low electrical energy, medium voltage, stable performance and good safety. The temperature range is better. The lifespan of lithium iron phosphate batteries is generally more than 1,000 cycles and can reach 2,000 cycles. Electric buses use lithium iron phosphate batteries.
Disadvantages:
Ternary lithium battery: high capacity, good consistency, short life, relatively large size, poor low temperature performance.
Lithium iron phosphate battery: small size, can be installed with larger capacity, performance does not decrease much in winter, initial capacity is large, presenta clear mileage advantage over lithium iron, but will diminish considerably later. in life.
Detailed information:
The left side of the lithium iron phosphate battery is a olivine Structure Material LiFePO4 The positive electrode made of aluminum foil is connected to the positive electrode of the battery. On the right is the negative electrode of the battery made of carbon (graphite), which is connected to the negative electrode of the battery by a copper foil. In the middle is a polymer separator that separates the positive electrode from the negative electrode. Lithium ions can pass through the separator but electrons cannot pass through the separator. The battery is filled with electrolyte and the battery is sealed by a metal case. ?
Baidu Encyclopedia-Lithium iron phosphate battery