How many 10,000 kilometers does a lithium ternary battery last before it goes bad? And what is the meaning of cycle times?

At present, many ordinary consumers have doubts about the durability of power batteries in new energy vehicles. However, in some specific areas, new energy vehicles are showing strong potential.

1. In which areas can new energy vehicles be widely promoted?

Although new energy vehicles currently have some shortcomings and cannot meet everyone's needs, they are very suitable in some specific areas. First, public transportation can be popularized with new energy buses.Battery recycling Buses travel on relatively fixed routes every day and are mostly stop-and-go roads. According to statistics, the average speed of buses is only 15km/h. Even according to the calculation of 18 hours of work a day, the mileage of a bus is hardly more than 300km a day.

As buses have more space, the chassis is suitable for arranging more battery packs, so it is relatively easy to realize a range of more than 300km. In addition, most buses do not operate at night,cylindrical cell assembly machine which is a good time for charging. It is also relatively easy to build dedicated charging piles in bus terminals. Even if individual vehicles have problems due to battery failure, other vehicles can be found in time to replace them.

In summary, public transportation is a suitable area for promoting new energy vehicles, which is why we are seeing more and more electric buses.

In addition to public transportation,battery making machine short-distance logistics transportation is also a blue ocean market for new energy vehicles. More and more courier boys are starting to use pure electric vans or vans for last-stop delivery services. Usually, a courier boy's daily activities are limited, and mostly stop-and-go road conditions. There is basically no delivery service at night, and the courier site is suitable for installing fixed charging piles. This series of reasons led to the rapid rise of new energy vehicles in the logistics field.

2. How long is the service life of the power battery pack?

One of the major reasons why many people are afraid to buy new energy vehicles is the concern about the life of the battery pack. Before discussing the life of power battery packs, we should first understand the number of battery cycles. The power battery packs currently in use are mainly lithium ternary batteries, and we refer to a complete charge and discharge cycle as a cycle. For example, when we still have 40% of the power to fill the battery, and then used to 40% of the power does not count as a cycle, you must use up the remaining 40% of the charge to 40% of the power to count as a complete cycle.

Generally speaking, the number of cycles of lithium ternary batteries is around 500~1000 times. If we assume that a complete cycle of new energy vehicles can run 300km, then it means that the battery cycle times will run out only after 15~300,000 kilometers. But does running out of cycles mean that the battery is obsolete?

Generally speaking, the number of cycles of a battery is the number of times a battery's capacity decreases to 80% of that of a new battery. This means that after the number of cycles is reached, the battery is still usable, but the capacity is reduced by more than 20%. So according to the above method of calculation, full electric range of 300km of pure electric vehicles, power battery use more than 200,000 kilometers is no problem.

Instead of worrying about the life of the power battery pack, pay attention to the usual habits of the car. For ternary lithium batteries, shallow charging and discharging can effectively guarantee the number of battery cycles; and violent driving will make the battery's instantaneous current too large, which is unfavorable to the service life of the battery.

3. How to deal with the aging battery pack of new energy vehicles?

The battery pack of a new energy vehicle has a long service life and can basically cover the entire life cycle of the vehicle. However, one day it will be necessary to dispose of the used batteries. According to the current technical means, new energy vehicle batteries will be utilized in two ways: stepwise utilization and dismantling and recycling.

Even if the power battery pack of a new energy vehicle cannot meet the requirements of driving the vehicle, it usually still has more than 60% of the energy storage capacity. It would be too wasteful to dismantle and recycle it directly. These power batteries can be given to enterprises and units that are less concerned about battery performance, such as energy storage in power stations, energy storage in residential buildings, and emergency power storage. This kind of laddering reuse can make full use of the whole life cycle of the power battery.

After the ladder is utilized, the power battery needs to be dismantled and recycled. The former lead-acid batteries are more polluting, compared with the mainstream lithium iron phosphate batteries are now much more environmentally friendly. Which does not contain mercury, cadmium, lead and other toxic heavy metal elements, phosphorus, acid, iron, lithium elements can be recycled. However, the electrolyte of lithium ternary batteries still has a certain degree of pollution, need to go through a number of harmless treatment before being discharged into the river. So the recycling of ternary lithium battery packs is far less harmful to the environment than we think.

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