Electric vehicle battery life is longer than you think

With the continuous development of electric vehicle technology, more and more consumers have begun to recognize and choose to purchase electric vehicles. The most critical factor affecting electric vehicles is the battery life of electric vehicles. Conventional concepts generally assume that batteries will experience degradation as the electric vehicles are used, and their entire battery will lose approximately 20% of their capacity. But is this really the case? At present, researchers from the Lawrence Berkeley National Laboratory have conducted an experimental study on the above issues. The experimental results are also very unexpected. The results of this study indicate that for an electric vehicle user, the absence of 20% of the battery capacity of the electric vehicle does not have a substantial impact on the user.

Perhaps some people will have doubts at this time. About 20% of the entire capacity of the battery will really not affect users.

Data Research on Battery Life of Electric Vehicles

Lawrence Berkeley National Laboratory's experimental research on the above issues has now confirmed clear results, but this article does not want to bluntly move data to the readers from the beginning. Among them, Samveg Saxena, the leader of the Powertrain Research Team at the Lawrence Berkeley National Laboratory, gave a very impressive summary of the above experimental results. Samveg Saxena concluded: “Through the above experimental results we found that the The lack of electric capacity due to the use of electric vehicles will not affect most electric car users, but only a small percentage of users will not be able to meet their daily commuting driving needs because of this problem. The reason is that the overwhelming majority of consumers do not need more than 40 miles of daily commuting driving demand, and even if the electric car battery degrades its capacity by 20%, most electric car users will not affect daily life. Commuting driving needs.”

Ever since, electric vehicle advocates have claimed that the absence of 20% of the battery capacity of the above electric vehicles does not have a substantial impact on users. The above laboratory research report of Lawrence Berkeley National Laboratory further validates the above viewpoint. Lawrence Berkeley National Laboratory's experimental research on the above issues is mainly directed at the real driving mode of electric vehicles.

Conducting an experimental study on the above issues sounds simple, but the first step to getting real experimental data is to collect real driving records for electric vehicles. The actual driving records of electric vehicles can be obtained through the US Department of Transportation's family travel survey report. In the above report, the daily schedule of the electric car 24 hours a day will be recorded in detail, which will include both the vehicle's parking time and driving time.

Taking into account the sales status of the electric vehicle market, the above research report mainly describes the internal combustion engine cars. But the key to this report lies in the detailed record of the driver's daily driving habits regardless of the type of driver's driving vehicle.

In order to convert the above data into electricity-driven data, researchers at the Lawrence Berkeley National Laboratory experimented with the Nissan Torso, which is currently very popular in the US electric vehicle market, and has a battery capacity of 24 kWh.

All that needs to be done after the actual EV driving record is obtained is to import the above data into a dedicated vehicle-to-grid simulator inside the Lawrence Berkeley National Laboratory. The simulator was independently developed and measured by the Lawrence Berkeley National Laboratory. Battery power drive and charging process professional equipment.

Considering the diversity of sampling results, the research team's researchers selected different types of vehicle charging, city or highway driving conditions, undulating or flat driving conditions, onboard air conditioning on or off, and transportation from the United States. More than 130,000 eligible driving records from the Department's family travel survey have selected more than 130,000 eligible samples for data processing.

Summarizing the above report, the researchers found that 85% of the driver's driving needs can be met even when the battery capacity of the electric vehicle is 20% missing, and 80% of the battery capacity can still be satisfied when 50% of the battery capacity is lost. Driver's driving needs. People may be surprised by the above results, but it is even more surprising that the daily commuting driving needs of more than 50% of the drivers can still be satisfied when the battery capacity is reduced to 30%.

At this point, some people may think that with the use of electric vehicles, the degradation of their batteries is not just the lack of battery capacity, it is also likely to affect the vehicle's power performance. But is this true? The research team found through research that the degradation of the battery does not affect the power performance of the vehicle battery. As mentioned before, the most critical factor affecting the battery is the service life of the battery.

About the service life of electric vehicles

There has been considerable discussion on the range of EVs for EVs. Does everyone need extra mileage? Does everyone need an electric car that has a range of more than 200 miles?

For an electric vehicle, the greater the battery life, the more convenient it will be. The larger the mileage, the lower the charging frequency. However, electric vehicles with cruising range of more than 200 miles are not available to the average consumer. 200 miles of cruising range means continuous and continuous driving for a long time. This is not the case in the daily life of most consumers. common.

The problem of the charging convenience of electric vehicles has gradually been solved. Unlike traditional gas stations, charging devices do not require specific applications like gas stations. People can easily access charging devices at home, work places, shopping malls, and other public places. People can also Connect the electric car to the charging device in the garage. In people's daily arrangements, people can seamlessly access the charging device, no matter how frequently people need to recharge.

For an electric vehicle with a large cruising range, a long cruising range also means long-distance driving. For long-distance driving, the user's driving endurance will also become an important consideration. I believe most consumers don't like long driving.

If the consumer is willing to take a break every few hours while driving long distances, then the super electric car with a cruising range of 200 miles will be no different from the average electric car. The battery of a super electric vehicle with a cruising range of 200 miles can achieve an extremely long service life even if 20% of the capacity is lost. At this time, the most critical factor affecting electric vehicles will become the number of fast charging devices along the road.

Therefore, before consumers decide to purchase an electric car, please analyze their driving needs in detail to find the battery capacity suitable for their daily driving habits. After full consideration of the above, the mileage problem of electric vehicles will no longer be a problem.