I don't know how the lithium battery is still driving electric car

　　Author ：Iflowpower – Færanleg rafstöð birgir

The battery is the soul of electric cars, no batteries, electric cars cannot show his differences. In the overall cost of an electric car, the battery can account for 30% -45% of the cost, the motor, and electric control accounts for 20% -25%, the body and other parts accounted for 20%. This shows how important the battery is! Therefore, the battery is also an object that major cars manufacturers focus on.

So, what kind of battery is important now on the market? There are four types of four: three-dimensional lithium ion battery, lithium iron phosphate ion battery, lead-acid battery and lithium-ion battery. The three-dimensional lithium-ion battery three-dimensional lithium ion battery is a three-dimensional polymer lithium-ion battery, as the name implies, is based on nickel-salt, cobalt salt, manganese salt as a positive electrode material as a positive electrode material, and the ternary material is used as a positive electrode. The safety of the battery is higher than the lithium cobalt ion battery, which is the object of current battery manufacturers.

Whether you buy something, the customer will analyze its advantages and disadvantages while buying, and will tend to purchase advantages and disadvantages of goods, but the advantages and disadvantages of the three-yuan lithium-ion battery are very obvious, it is difficult to use the proportion to judge. The three-dimensional lithium-ion battery outstanding advantages are that his weight energy density is significantly higher than that of other types of batteries, which means that the same weight of the three-dimensional lithium-ion battery compared to other batteries, its battery life is more a lot of. However, the structure is not stable in terms of high temperature, so that security is difficult to control, and the cost is relatively high.

Although many people currently pay attention and use this battery, its development has a long way to go. Lithium iron phosphate ion battery lithium iron phosphate ion battery is a lithium ion battery based on lithium iron phosphate as a positive electrode material. Related to the three-dimensional lithium-ion battery, the safety of the lithium phosphate ion battery is high, the PO key in lithium iron phosphate crystals, even if it is difficult to decompose in the case of high temperature or overcharge, and can be quickly charged, used Long life.

At the same time, my country's lithium reserves rich, the reserves of iron oxide phosphate oxide in China are also abundant, so that there is a good advantage in my country's lithium iron ion battery, so domestic companies are more willing to choose development and study of iron phosphate. Lithium-ion battery, such as BYD, is quite in this battery. In the new model Qin, I used the latest research and development of lithium phosphate ion batteries.

This battery added manganese elements, and its energy density reached the density of the ternary material, and it was greatly improved in the battery life. However, there is a big problem with many car owners complaining that the voltage and battery capacity of the battery. These two points are also an important issue of lithium iron phosphate ion batteries.

The energy density of the lithium iron phosphate ion battery is low, which makes the volume are relatively large, and the battery has a small volume, causing the battery life to become a short board, and the battery is basically unable to recover after the scrap, it can only be thrown away, the recycling value is very Low, in the end, this battery is poor, and the charging of winter is also a big problem. Therefore, if BYD wants to continue to lead in the battery, it will cost a lot of effort. The lithium-cobalt-free battery of the cobaltate is Tesla's "special battery", which has a stable structure, high capacity, and high overall performance.

It has a good battery capacity, but because the unit is small, it makes the car More than the number of batteries, Tesla has built more than 7,000 sections of the model of Models, 18650, three-yuan lithium-ion battery is enough to drive the car to run. When the battery's own temperature reaches 250-350 ¡ã C, the internal chemical ingredients have begun to decompose, and there will be a lot of safety hazards. In response to this problem, Tesla has also prepared, and there is a fuse at both ends of each battery.

When the battery is overheating or current is too large, the fuse will be cut, preventing the entire battery pack because a battery is affected by a battery. appear. However, although theoretical solution is already the best, will it really prevent it in practical applications? Also, if there is a problem with a whole internal battery pack, how will it solve it? This is also a problem to think.

The lead-acid battery lead-acid battery is the old man in the battery. It has already had a history of 150 years, and its electrodes are important from lead and its oxides. At present, the application of lead-acid batteries is relatively wide and important for low-speed electric vehicles.

The advantage is that the voltage is stable, the capacity is large, and the temperature range is wide. It does not appear in the case of severe winter, the technology is mature, the safety is high, and the cost is low. However, the shortcomings of lead-acid batteries are also very obvious, low energy density, usually large volume, short service life, troubles, pollution problems is very serious.

The important issue of lead-acid battery contamination is that there is no coherent industrial chain. The complete battery industry chain should include production - use - recycling - renewable production, and lead-acid batteries are persecuted in waste recovery, on the one hand, because of the problem of interest disputes, there are very few formal waste battery recycling companies, on the other hand Government agency lacks specialized regulatory systems. The recycling work is not good, and the regeneration rate will decrease, resulting in serious waste of resources.

At present, my country's lead resource regeneration rate accounts for less than 40% of lead, and Western developed countries have reached 70%. The old industry must have its strong reason, but if its old problem is not good enough to give up, it will be a regret, so no matter whether it is company or a country, pay more attention to lead-acid battery, will Its pollution problem solves.