At present, the most popular electric vehicle on the market is lead-acid battery, but many areas have begun to introduce lithium-ion battery electric vehicles. Lithium battery electric vehicle, as its name implies, simply replaces lead-acid battery with lithium battery. Compared with lead-acid batteries, lithium batteries for electric vehicles are good? Does it really have a company? Is it as vivid as the dealer said? Now the state vigorously advocates energy conservation, green and environmental protection. Speaking of lithium batteries for electric vehicles, ok? Everyone's views are very consistent. Lithium batteries are lighter and have longer life than lead-acid batteries, but they are very expensive. But when is a good time? Everyone seems unable to answer again.
2. What are the advantages and disadvantages of lithium battery electric vehicles?
Advantages of lithium battery electric vehicle
1, lithium battery has long life, light weight and small size.
The power performance of lithium battery electric bicycle is similar to that of lead-acid battery (simple electric bicycle). It can travel 30~45 kilometers after charging for 6~8 hours, but its weight is only about 1/5 of that of lead-acid battery. The biggest advantage of lithium battery electric bicycle is its long life.
Disclaimer: It is said that the price of lithium battery is only a superficial phenomenon. In fact, the cost of careful calculation is similar to that of lead-acid batteries. At present, lithium batteries are generally guaranteed for 2 years, and lead-acid batteries are guaranteed for 1 year.
2. Lithium batteries have activation-free characteristics.
In the use of lithium batteries, it should be noted that after a period of time, the battery will enter a dormant state, when the capacity is lower than normal, and the use time will be shortened. However, the lithium battery is easy to activate, and it can be activated after 3-5 cycles of normal charge and discharge, and the normal capacity can be restored. Because of the characteristics of lithium battery itself, it has almost no memory effect. Therefore, users do not need special methods and equipment in the activation process of new lithium batteries.
3. No memory effect
When charging lead-acid batteries and nickel batteries, consumers are always worried about the memory effect of batteries. When using lithium batteries, everyone can breathe a sigh of relief. Lithium batteries have no memory effect.
Disadvantages of lithium battery electric vehicle
1, the high price of lithium battery electric vehicles is due to lithium batteries.
At present, the price of lithium battery electric bicycles is generally several hundred yuan to one thousand yuan higher than that of lead-acid battery electric bicycles, so it is difficult for consumers to recognize them in the market. Lithium batteries are light and environmentally friendly, and will not cause environmental pollution after being discarded. Once the application technology is mature and the market sales increase, the price of lithium battery electric bicycles will come down.
2, lithium battery charging time is too long.
The lithium battery or charger will automatically stop charging after the battery is fully charged, and there is no so-called "trickle" charging of nickel electric charger for 10 hour. In other words, if your lithium battery is fully charged, it is also charged in vain on the charger. None of us can guarantee that the characteristics of the battery's charge and discharge protection circuit will never change and the quality will be foolproof, so your battery will be on the verge of danger for a long time. This is another reason why we oppose long-term charging.
In addition, in some electric vehicles, if the charger is not removed after charging for a certain period of time, the system will not only stop charging, but also start discharging-charging cycle. Perhaps this practice of the manufacturer has its own purpose, but it is obviously unfavorable to the life of the battery. Therefore, after buying a lithium battery electric vehicle, you must consult the enterprise or dealer to do a good job in maintaining the lithium battery.
3. The dynamic performance of lithium battery needs to be improved.
Compared with lead-acid batteries, lithium batteries are much less resistant to charge and discharge fluctuations, which is one of the major symptoms that lithium batteries can not be effectively used in high-power vehicles at present, resulting in a decline in durability.
4. The safety of lithium-ion batteries is outstanding.
The safety of lithium batteries still needs to be improved. The hidden dangers of fire, burning and even explosion of lithium batteries cannot be completely eliminated at present. The collision of vehicles may cause the anode and cathode materials of the battery to break through the diaphragm, and the ultra-high current when the energy is quickly charged into the battery during braking will lead to short circuit, temperature rise, and even combustion and explosion. The cause of the fire is that lithium ions are precipitated due to collision and short circuit, and will catch fire when they come into contact with air. In addition, the electrolyte of lithium-ion battery is organic electrolyte, and these substances are more likely to catch fire and burn after contacting with air.