lithium iron phosphate battery disadvantages

Why don't all electric vehicles be replaced with lithium iron phosphate batteries? Lithium iron phosphate battery technology has matured. Why are electric bicycles rarely used? It is a general trend to switch to lithium iron phosphate batteries for electric vehicles, and the current price of lithium iron phosphate batteries has also fallen sharply. The common specification of 48V/12Ah lithium iron phosphate battery components has been reduced to more than 700 yuan. However, it has not yet been finalized for production and is still in the experimental stage. There are few finished products that can be directly installed on the market.

  Why don't all electric vehicles be replaced with lithium iron phosphate batteries?

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  The lithium iron phosphate battery has no heavy metals, the battery recovery rate exceeds 95%, and the electrolyte is almost non-polluting. Some types can even be drunk. The price of batteries with so many advantages will naturally not be low. Although the price is lower than that of ordinary nickel-cobalt-manganese ternary lithium batteries, the selling price per kwh is about 1,500 yuan, and the price of some brand-name electric bicycles is only more than 1,000 yuan, allowing consumers to pay one more. The price of times is only for environmental protection. How many people are willing to pay?

However, the actual car cost of lithium iron phosphate batteries is still very cost-effective in the long run. More than 2,000 cycles of replays can ensure that the capacity attenuation is controlled at about 70%, while ordinary lead-acid batteries are even 1/3 of the level of iron batteries. Can't do it. Therefore, iron batteries are actually more cost-effective based on the frequency of battery replacement, but the high budget for car purchases has prevented many consumers from enthusiasm.

In the short term, lithium iron phosphate batteries are difficult to be applied to two-wheeled electric vehicles regardless of price. The main function of this type of battery is not only in the use of automobiles, but also as energy storage in fields such as photovoltaics and wind power after the batteries are eliminated. The battery has been used for decades.

  Can lithium iron phosphate batteries be used on electric bicycles?

   Ordinary lead-acid batteries have relatively low cost, but they are heavy in weight, low in energy density, short in service life, and have potential heavy metal pollution problems.

Lithium iron phosphate batteries can be used in electric bicycles, but electric bicycles are currently mainly lead-acid batteries. After all, lithium batteries are expensive. Although the price of iron lithium is cheaper than three yuan, the capacity is also low. Electric bicycles are mainly low-end products. , Consumers generally value price, so the promotion of lithium batteries is not ideal.

  Because of the inconsistency of lithium iron phosphate battery production, a separate battery management system is required. The positive electrode will form the problem of elemental iron, which can cause micro-short circuit of the battery, which is also the most taboo substance in the battery. This is also the fundamental reason why Japan has not used this material as a positive electrode material for power-type lithium-ion batteries.

  The consistency of the products is poor, and it is much more difficult to manage than lead-acid batteries. If a certain battery cell is broken, it is difficult to replace only one. In this way, maintenance and repair are also a problem for products such as electric bicycles.

   The advantages of lithium iron phosphate battery as a power battery for electric vehicles

   1. The safety is quite high

  To be the power of a car, safety is the overriding primary consideration. Although the safety of ordinary lithium batteries can be basically guaranteed, there is a possibility of fire and explosion under extreme conditions. Lithium iron phosphate battery, as the second-generation product of lithium battery, has stable physical properties, coupled with the built-in protection functions of overvoltage, undervoltage, overcurrent, and overcharge in the battery pack, so it does not explode or fire. It is currently the only absolutely safe product in the world. Lithium Ion Battery.

  2, long life and low cost

As a power battery, the service life (cycle performance) is closely related to the overall cost of use. Compared with the cycle life of an ordinary lithium battery of about 500 times, the lithium iron phosphate battery can be charged and discharged for 1500 cycles at room temperature, and the capacity retention rate is 95%. Above, and the cycle life of 50% capacity has reached more than 2000 times, the battery's continuous mileage life is more than 500,000 kilometers, can be used for about five years, which is 8 times that of lead-acid batteries.

  3, excellent discharge performance

  The discharge performance of the lithium iron phosphate battery is also very good, the power curve is stable, and the ability to resist overdischarge is strong. After the ordinary lithium battery cell is lower than 3.2V, the discharge is overdischarged, which may lead to scrap. However, the lithium iron phosphate battery still releases energy at 2.8V, and there is no problem of scrapping below 2.5V.

   4. Easy to use and handle

We know that nickel-metal hydride and nickel-cadmium batteries have a strong memory effect. Ordinary lithium batteries also have certain memory effect problems. They need to be fully charged as much as possible, which will bring inconvenience to the daily use of electric vehicles, while lithium iron phosphate batteries have no This phenomenon has low self-discharge; no memory effect, no matter what state the battery is in, it can be charged and used at any time without having to discharge it before charging.

   5. Fast charging

  The lithium iron phosphate battery has excellent fast charging characteristics. It can be charged by a special charger quickly, and it can be enough for about 95% in half an hour.

  6, green battery

Lithium iron phosphate batteries do not contain any heavy metals and rare metals, are non-toxic, non-polluting, and comply with regulations. They are absolutely green and environmentally friendly batteries. Lead-acid batteries contain a large amount of lead. If they are disposed of improperly, they will be harmful to the environment. Secondary pollution, and lithium iron phosphate materials are pollution-free in both production and use.

   The above is the reason why electric vehicles are not replaced with lithium iron phosphate batteries. Lithium iron phosphate batteries have higher safety and longer cycle life. The performance in terms of stability is very outstanding. Lithium iron phosphate batteries have more obvious advantages in the current policy environment.