There are many types of batteries, including lithium battery packs and ternary lithium batteries, both of which are the core of power battery electric cars. Many people ask Xiaobian, lithium iron phosphate battery packs and ternary lithium batteries which are better? What are they? Advantages and disadvantages? Let me thoroughly understand this through this article.
The concept of lithium iron phosphate battery pack:
Lithium iron phosphate battery pack refers to a lithium ion battery using lithium iron phosphate as a positive electrode material. Since its performance is particularly suitable for power applications, the word 'power' is added to the name, that is, lithium iron phosphate power battery. Compared with traditional lead-acid batteries, it does not contain precious metal elements. Lithium battery packs have significant advantages in terms of operating voltage, energy density, cycle life, and high temperature resistance.
Ternary lithium battery concept:
A ternary polymer lithium battery refers to a lithium battery using a ternary positive electrode material of lithium nickel cobalt manganese or lithium cobalt aluminum aluminate as a positive electrode material, and a lithium battery using graphite as a negative electrode material. The specific energy of the ternary lithium battery is greater than the specific power. 3. In the case of large rate charging, and low temperature resistance, the ternary lithium battery also has great advantages.
What are the advantages and disadvantages of lithium iron phosphate battery pack and ternary lithium battery?
■ Analysis of advantages and disadvantages of lithium iron phosphate battery pack
1, lithium battery pack advantages
High temperature performance: Lithium iron phosphate battery pack can reach a peak temperature of 350 °C-500 °C, and the operating temperature range is wide -20C--75C.
Long service life: Lithium iron phosphate power battery, cycle life of more than 2000 times, standard charging 5 hours rate, can reach 2000 times.
Large capacity. Lithium iron phosphate battery pack is 2~3 times higher than the storage capacity of carbonated batteries under the same volume.
Small size and light weight: The lithium iron phosphate battery pack of the same specification capacity is 2/3 of the volume of the lead-acid battery, and the weight is 1/3 of the lead-acid battery, and the weight is lighter.
Safety and environmental protection: The lithium iron phosphate battery pack has passed strict safety tests, and will not explode even in severe collisions; it does not contain any heavy metals and rare metals, and is non-toxic, no pollution in production and use.
No memory effect: The state of the lithium battery pack can be used as it is, without having to put it all over again.
Fast charging: Use a dedicated charger, 1.5C charging for 40 minutes to fill the battery.
2, lithium battery pack shortcomings
The preparation cost of the material and the manufacturing cost of the battery are high, and the battery yield is low, which will make the cost of the final unit energy storage capacity higher.
The low temperature performance of the lithium battery pack is poor, and the tap density of the positive electrode material is small. The lithium iron phosphate battery cannot drive the electric vehicle at a low temperature (below 0 ° C), and the density is generally about 0.8 to 1.3.
The product consistency is poor. At present, there is no lithium iron phosphate material factory in China that can solve this problem. In this complicated reaction process, it is difficult to ensure the consistency of the reaction.
Poor conductivity, slow diffusion of lithium ions, high specific charge capacity when high charge and discharge.
Summary: The advantages of lithium iron phosphate battery packs have a lot of room to play! Our development and utilization of it has just begun. Now the theme of society and the world is green, so there will be huge play. The shortcomings will continue to To improve, actively develop new technologies, and produce high quality products.
■ Analysis of advantages and disadvantages of ternary lithium battery
1, ternary lithium battery advantages
High voltage platform: The voltage platform of ternary material is obviously higher than lithium iron phosphate, the high line can reach 4.2 volts, and the discharge platform can reach 3.6 or 3.7 volts.
High energy density: The higher the voltage platform, the larger the specific capacity, so the same volume, weight, and even the same battery, the high voltage platform of the ternary material lithium battery has a longer battery life.
High tap density, higher density than lithium iron phosphate battery.
2, the disadvantage of the ternary lithium battery
3. The safety performance is poor, and the ternary battery with large capacity is difficult to pass the safety test such as acupuncture and overcharge.
Poor temperature resistance, high temperature structure instability, resulting in poor high temperature safety, and too high pH value to make the monomer flatulence.
Short cycle life, high power discharge.
The element is toxic, and the temperature of the ternary lithium battery rises sharply after high-power charge and discharge, and the oxygen is easily burned after the high temperature.
Summary of the article: Lithium iron phosphate battery pack and ternary lithium battery have their own advantages and disadvantages, so the application fields are also different. Battery companies should pay more attention to battery safety, strengthen production monitoring, and strictly guarantee quality, in order to ensure the use of lithium batteries. Safety.