"Buy an electric father, the shorter the cruising range, the shorter"

"Changing a battery is more expensive than buying a new car"

Has your battery started to decay in your electric car?

When it comes to electric cars, batteries are a topic that can't be avoided. Just like the batteries of mobile phones and computers, the batteries of electric vehicles have been used for a long time, and their performance will be reduced due to attenuation. How to identify and deal with battery attenuation has become a concern for many electric vehicle owners.

Is the battery attenuation normal?

Think about your mobile phone. When you first bought it, it was full of the glory of the king who can play for most of the day, but now it can only be maintained by playing while charging. Therefore, it can be seen that battery attenuation is an inherent defect of all electronic products.

At present, the batteries used in electric vehicles on the market are mainly lithium batteries. The lithium atoms move back and forth between the positive and negative electrodes to achieve charging and discharging. Each time a charge and discharge cycle is completed (full and full discharge), the electrode structure will change, although This change is very small, but over time, it will cause the battery performance to decline.

Some organizations have made statistics on the battery attenuation of electric vehicles, and found that with the increase of vehicle mileage and usage time, the cruising range of all owners has declined, but the battery attenuation of certain brands of electric models remains at 20 Within%, some brands are as high as 45%.

As far as the current technological level is concerned, battery attenuation is an inevitable and normal phenomenon. However, many car owners have encountered "abnormal" battery attenuation-

What does the "abnormal" attenuation do?

With normal attenuation, there will naturally be abnormal attenuation. Car owners and friends can compare the following performances to see if a similar situation occurs in their cars:

[Decrease of charging power / significant shortening of cruising range under the same power]

For example, before it could charge 25KWh of electricity, now it can only charge 15KWh of electricity; in the past, the full-charged cruising range can reach 300 kilometers, but now the full-charged cruising range is only 150 kilometers. Similar to this situation, it means that the battery attenuation of the car is not normal.

【Increase in charging time】

Battery decay will affect the battery charge and discharge, making the battery charge time increase. For example, it took half an hour to charge from 20% to 80%, but now it takes one hour.

[Less than 100% charged]

Many car owners and friends report that their electric cars have been on for a few years, and they automatically power off when the battery charge reaches 80%. Although the table shows that the battery has been charged to 100%, it is actually not disabled. Power consumption is fast. Such a situation also belongs to abnormal battery attenuation.

What to do if the battery decay

For battery attenuation problems, most manufacturers have taken measures to repair or replace the battery pack. When a car owner reports a battery failure, the manufacturer will cooperate with the battery supplier to conduct a test. If the battery attenuation exceeds 20%, the vehicle within the warranty period can be replaced free of charge; if it does not reach 20%, the technician will carry out the battery pack Balanced repair.

It is worth mentioning that there are many factors that affect the attenuation of electric vehicle batteries, so it is not easy to determine the degree of battery attenuation. At present, there is no clear reference standard in China, and the delineation of the scope is quite vague, making consumers often vulnerable and unable to really Solve the problem. In addition, the replacement price of electric vehicle batteries is also not public. Each brand has its own billing standards. There have been reports that BYD owners cost more than 60,000 yuan to replace batteries, which is more expensive than buying a car. Such chaotic and opaque pricing has caused chaos in electric vehicle maintenance.

Therefore, in daily use, it is also very important to delay battery decay.

Some car owners and friends want to save trouble and often choose the fast charging mode. In fact, this will increase the workload of the battery. Therefore, it is recommended that you try to use the alternate charging method of fast charging and slow charging to maximize the protection of battery life; The number of charge and discharge of the battery is limited, so it is not advisable to charge the battery after it is completely exhausted.

Today, more and more people choose or are planning to start electric cars, which is a good thing, but because of the battery problem, many people are discouraged. However, I believe that these problems can be solved in the near future. After all, electrification has become an inevitable trend.