How long does the lithium battery of electric cars can be used?

With the announcement of the ban on the sale of fuel vehicles in various countries around the world, the new energy industry has once again ushered in a wave of development. It is foreseeable that lithium batteries will be widely used in the electric vehicle industry in the future.

Lithium electric car battery three main categories, first three-lithium, is currently the most widely used for a lithium battery, lithium iron phosphate, the second, the third lithium titanate, lithium titanate in which a low popularity, is the use of the human less. First, Tianneng Cheerwin and major manufacturers are basically ternary lithium batteries. Among them, Tianneng Lithium is 18650 lithium battery, Cheerwin Lithium is mainly soft ternary lithium, all belong to ternary Lithium type, 3.7V, fully charged 4.2V.

The three taboos of lithium batteries!

At the first temperature, lithium batteries are afraid of high temperatures.

The second largest current, such as 18650 battery is 3C discharge, your electric car is 8000W, the battery used is lower than the discharge current of your electric car, which will cause the lithium battery temperature to be too high, the current is too large and the life is shortened. There will also be cases where the drum kit is scrapped. If your electric car is very powerful and very fast, it is recommended to choose 18650 batteries with 10C current. It is obviously very important to choose the right battery core!

The third is full power storage, ternary lithium battery full power is 4.35V, the current protection board on the market is 4.2V to cut off the charge, so many people buy electric car lithium battery said no nominal capacity, in fact, For this reason, it is generally best to store lithium batteries for electric vehicles for a long time. The best 50-inch TVs are the best. For example, if you buy a new mobile phone, many of them are powered by 50%. If the full storage time is long, the lithium battery capacity will be reduced. Except for lithium iron phosphate and lithium titanate, these two types can be stored at full power. It is also necessary to pay attention to the selection of a better quality protection board. The biggest taboo for lithium batteries is overshoot and over discharge. Scrap, overshoot must be sterilized.

★ China Electric Vehicle Alliance ★ Members answer: Lithium battery life for electric vehicles is higher than lead-acid batteries. Lithium batteries store more electricity than lead-acid batteries, and the amount of electricity used is also very powerful. The cockroaches, as well as the lithium battery, have self-protection ability after being fully charged, that is, they can no longer be charged after being filled, but the lead-acid battery is completely different. After it is full, although the charger display is full, it is bright. The green light, the outsiders seem to think that the charger has stopped working, but there is no flaw, it is still a small amount of slow charging, if the time is long, then the lead-acid battery is the most easy to fill, but the battery is scrapped. . However, as long as the lead-acid battery is charged normally and charged for 4-8 hours every day, there should be no problem, and the price of the lithium battery is much higher. It is only 2-3 thousand yuan for the electric vehicle. After replacing the lithium battery, It’s a few thousand, it’s not worth it. Their service life is not much different, it is 1-2 years, but it must be mainly maintained, often charging to ensure the saturation effect of the battery. ,

1. Lithium battery light weight Small lithium battery Electric car is currently diversified in brand. It is similar to lead-acid battery in terms of power performance. It can be charged for 6~8 hours. It can run 30~45km depending on battery capacity. The weight is only lead-acid battery. 1/5 or so, and currently the general lithium battery is guaranteed for 2 years, and the lead-acid battery is guaranteed for 1 year.

2, lithium battery with activation-free characteristics Lithium battery is easy to activate, as long as 3-5 times the normal charge and discharge cycle can activate the battery, restore normal capacity. Due to the characteristics of the lithium battery itself, it is determined that it has almost no memory effect. Therefore, the user's new lithium battery does not require special methods and equipment during the activation process.

3, lithium battery with memory effect When charging lead-acid batteries, nickel batteries, have been worried about the battery memory effect, and electric bicycle lithium battery without memory effect, you can rest assured that you do not have to worry about the battery before charging.

4, lithium battery cycle life Long lithium-ion battery charge and discharge at 1C rate, its cycle life is greater than or equal to 500 times, the capacitance at the 500th time, greater than 70% of the nominal copper beam. The lead-acid battery, even if it is discharged at 0.5, is charged at 0.15 C, and its cycle life is 350 or less, and the capacity is 60% or less.

5, wide operating temperature range Electric bicycle lithium-ion battery can work in the range of -25 degrees to 55 degrees, its capacity can reach 70% of the nominal capacity, and lead-acid batteries can only work in the range of 10 to 40 degrees, It does not work properly at -25 degrees.

6, lithium battery charging time is short, green and environmentally friendly Because the electric bicycle lithium-ion battery has the characteristics of high current charging, so the charging time is only 4-5 hours, while the lead-acid battery takes 8 to 10 hours. There is no heavy metal lead harmful to the environment, which is a highly environmentally friendly product.

1. The battery below the average wholesale price of the market is determined not to buy.

2. Products that have not passed the market test for more than 2 years.

3. The battery without the electric vehicle manufacturer is definitely not bought.

4, high-priced batteries, if not produced by large factories, resolutely do not buy.

5. The battery that changes the national standard size is definitely not bought.

6, 5A discharge, 30 seconds when the voltage is higher than 12.68V, do not buy, more than 90% are short-lived batteries.

How long does it take: How many years can an electric car lithium battery last? I believe that most consumers have heard that the life of lithium batteries is "500 times" and 500 times of charge and discharge. More than this number of times, the battery will be "dying down". Many friends are trying to extend the life of the battery every time. Charging when the battery is completely exhausted, does this really extend the life of the battery? The answer is negative. The life of a lithium battery is "500 times", which means not the number of times of charging, but a period of charging and discharging.

A charge cycle means that all of the battery's charge is from full to empty, and then from empty to full, which is not the same as charging. For example, a lithium battery used only half of the power on the first day, and then charged it slowly. If it is still the next day, it will be charged in half, and it will be charged twice in total. This can only be counted as one charging cycle, not two. Therefore, it is usually possible to complete a cycle after several charges. The battery capacity is reduced a little every time a charge cycle is completed.

However, this amount of power is very small, and high-quality batteries will retain 80% of the original capacity after many cycles. Many lithium-powered products will still be used after two or three years. Of course, the lithium battery life needs to be replaced after the end. The so-called 500 times means that the manufacturer has achieved 625 times of chargeable times at a constant depth of discharge, reaching 500 charge cycles. Due to the various effects of real life, especially the depth of discharge during charging is not constant, the "500 charging cycles" can only be used as a reference battery life.

Misunderstanding: We often have "the lithium battery is exhausted and then recharged" or "the lithium battery is full and then continue to flush, must be charged for 12 hours" misunderstanding. As everyone knows, if you overcharge or over-discharge the lithium battery, you will not be able to extend the life of the lithium battery of the electric vehicle, but will shorten it. So how do you use lithium batteries correctly?

Even if your electric car lithium battery can be used for 2 to 3 days with a single charge, it is recommended that you charge it every day. Because the lithium battery after use is in a shallow cycle state, charging every day will prolong the life of the lithium battery of the electric vehicle.

2, timely charging

Because the lithium battery will enter the vulcanization process after discharge, if it is charged in time, it can remove the less severe vulcanization. Therefore, the lithium battery should be charged as soon as possible after use, so that the battery is fully charged.

3, regular deep discharge

Regular periodic discharge of the battery also facilitates "activation" of the battery, which can slightly increase the capacity of the battery. The general method is to periodically discharge the battery completely.

4, try to use the original charger

Generally, do not change the charger at will when you are not sure. In addition, do not remove the controller's speed limit, remove the controller's speed limit, although it can improve the speed of some cars, but will reduce the battery life.

5, lithium battery storage

When the battery is not used for a long time, disconnect the battery from the whole vehicle, and add some power to the battery at intervals to avoid self-discharge of the battery or the power consumption of the protection board.