How long is electric car battery life? How much does it cost to change the battery estimation?

　　Author ：Iflowpower – Portable Power Station Supplier

Although the current disputes continue, in fact, many owners have seen it, the new energy car is the mainstream direction of the future my country's auto market. Whether it is from policy or from a strategic transition from catering enterprises, more and more car enterprises have already launched new energy vehicles, and independent brands are more carrying pure electric vehicles to overtake the foreign car. A big shortcut.

The national and car companies have a deep thinking about the entire development of the automotive industry, and we are a fart, and if the electric car is more concerned, it is not good to repair. After all, it is different from the development of the traditional car for hundreds of years. The electric car has a lot of doubts in the hearts of many ordinary people.

Here we answer the most concerned about ordinary owners. Type and characteristics of the battery? At present, the power lithium battery for new energy vehicles is divided into two kinds of three-dimensional lithium-ion batteries and lithium iron phosphate. The three-dimensional lithium-ion battery has a representative car Tesla, Beiqi E200EV, Jianghuai IEV5, Chery EQ, etc.

It is characterized by high energy density, the same volumetric weight, the capacity is large, battery consistency is good, production technology matures. Lithium iron phosphate ion batteries have high safety and longer cycle life, and the charge and discharge rate is high, that is, the charging speed is fast, and the acceleration performance is good. Good security, no problem with curved puncture high temperature.

The disadvantage is that the energy density is low. The same battery needs to use more batteries. The corresponding new vehicle weight and cost; the consistency is different, the battery management system should be better; the low temperature decline is more obvious, the capacity will be reduced by 0 ¡ã C % Or so, while the -20 degree capacity will reduce the largest electric vehicle manufacturer BYD in China as an example.

In the past, BYD has achieved mass production in the field of lithium iron phosphate, and begins to turn to three yuan lithium. Development, such as the current EV models such as BYD Qin, Tang, Song, all used three yuan lithium ion battery. Therefore, overall, three-dimensional lithium ion batteries have more obvious advantages in the current policy environment.

How long is the battery life? First of all, do you want to explain what is called a charge and discharge cycle, and the life expectancy is 1000 times. Is it necessary to charge 1000 times? Not! Just like mobile phone charging, mobile phone power from 0% to 100% is a charge and discharge cycle, and if only 50% will pull out the socket, it means that only half cycles. Take the most common three-dimensional lithium-ion battery and lithium iron phosphate ion battery, the three-dimensional lithium ion battery is in theoretically circulating life in the test, and the actual use, complete charge and discharge cycle is more than 800 times, and Controlling the battery discharge In a state of 25% -75%, the actual use can reach more than 1200 times.

Lithium iron phosphate power lithium battery, theoretical circulation life reaches 2,000 times, standard charging (5 hours), can reach 2000 times. In actual use, the fully charge and discharge cycle can also reach more than 1200 times. Therefore, it can be calculated at a very small calculation, and the three-yuan lithium ion battery electric vehicle is 300 kilometers, and the actual driving distance of the complete cycle is about 250 kilometers.

According to the full charge and discharge cycle, it is calculated that the life of the battery can reach 200,000 kilometers, basically cover the service life of a car. How is the battery attenuation process? Although the battery life can reach about 200,000 kilometers, there is another consideration standard, that is, the battery pack will decrease the energy density of the battery with charge and discharge. Just after the mobile phone is for a long time, the battery will be more and more unused.

Once the capacity of the battery is below the initial 80%, the battery pack is not suitable for continuing to use it on the car, it is necessary to replace the new battery. At present, the most accurate battery attenuation test data is obtained, only their own models published by each manufacturer. According to industry insiders, the amount of pure electric vehicles is relatively large in the first year, around 8%, but will attenuate 4% in 2-3 years, and will attenuate 1% after 5-16 years later.

From the foreign battery attenuation chart of the Thousand Tesla owners, it can be seen that ModeS is only 6% after running 100,000 kilometers. After running 250,000 kilometers, the average battery attenuation is less than 10%. Although there are also abnormal attenuation of individual owners, the attenuation amplitude is not large.

Which manufacturer's warranty terms are the warranty? At present, according to the state, the performance attenuation of the battery in the warranty period cannot exceed 20%, otherwise the factory is free to replace the battery for the owner of the owner. Require new energy car key components (battery, electric control, motor) supply no less than 5 years or 100,000 km warranty, and since 2016, the supply is not less than 8 years or 120,000 kilometers warranty. For example, Tesla's drive and battery pack warranty is an unlimited mileage; BYD supplies 8 years or 150,000 kilometers of warranty, lifelong electric core, Geely, North Stroke new energy is also available for battery pack for 8 years Or 150,000 kilometers warranty; Roewe supplies 8 years or 120,000 kilometers warranty for battery pack.

Are battery attenuation in the warranty range? At present, national regulations, during the shelf life (8 years / 120,000 km), battery performance is not exceeding 20%, otherwise, the manufacturer is free to replace. However, if the amount of battery attenuation belongs to normal, the manufacturer generally does not replace the battery. If you encounter a battery, the life is suddenly lowered, and it is an abnormal phenomenon.

The vendor will replace the battery pack for vehicles during the warranty period. Due to the development of pure electric vehicles in recent years, it has developed rapidly in recent years. Therefore, the case of replacing aging batteries is also very announcing.

Taking BYD as an example, BYD said that the normal attenuation range of BYD battery is currently decided by the manufacturer. We have a report to the battery in the store, and then pay the manufacturer, whether the manufacturer determines whether the car belongs to normal attenuation, if it is within the normal range Attenuation battery, free of supply free replacement battery pack service. Because this process is not transparent, that is, battery attenuation should not be changed by the manufacturer, it is the car company.

How much is the battery replacement? The price of battery pack replacement is currently not open, according to various websites such as lithium-grid, currently power lithium battery production costs in 1300 yuan / degree, and the price of the car is 1,700 yuan. But from the replacement owner, the price of the offer, the old BYD Tang change battery price is more than 50,000 yuan. Overseas Nissats announced the daily hearing battery replacement plan and price in March 2018.

Nissan owners buy new original 24KWH, 30KWH and 40KWH car batteries, the price of payment is 650,000 yen (about 40,000 yuan), 800,000 yen (about 49,000 yuan), 820,000 yen (binding 50,000 yuan). Since the wind of electric cars has been raised in recent years, many models in the market have not replaced the battery pack of the battery pack, so many battery recessions have not occurred. According to the national warranty period of 8 years / 120,000 kilometers, the security of the electric vehicle to the battery pack is sufficient.