Recently, CATL broke the news on social platforms: "The company has developed ultra-fast charging technology, which can charge 80% in the fastest 5 minutes." Many netizens are skeptical about this news. Is it reliable? It’s hard to imagine that such a fast charging speed actually exists. Could it be another “custom data” trick by the manufacturer?
In less than a month, the charging speed doubled again?
Last month, Ningde Times reported to netizens a "big news" - Ningde Times released the third-generation "Kirin Battery", with a system energy density as high as 255Wh/kg, and fast charging to 80% of the battery capacity. It takes 10 minutes for . With this kind of charging speed, even the Tesla super charging station can only "lazy". Unexpectedly, in less than a month, CATL has doubled the charging efficiency? Many netizens are hesitant about CATL's exposure, always feeling that there is some "moisture" in the data?
6.25 minutes to fully charge?
Some netizens asked a more "sharp" question - based on the standard of 80% charge in 5 minutes, can it be understood that the charge can reach 100% in 6.25 minutes? The answer may be obvious without any official answer, but it is definitely not possible. Just like we usually charge our mobile phones, the displayed charging completion value can only be used as a reference and is not completely accurate.
For example, different brands of mobile phones display different power consumption rates. Some mobile phones display a very slow power consumption rate when the battery level is above 90%. Once the battery level drops below 90%, the power loss rate will be significantly accelerated. On the other hand, some mobile phones are just the opposite. When the battery level is above 90%, the power consumption is very fast. The lower the power, the slower the power loss. In fact, this is caused by the different design mechanisms of mobile phone manufacturers for displaying battery power.
And CATL said that it is 80% full in 5 minutes. It is probably also referring to the display of power . This power itself is designed to be used as a reference for users and can be changed through mechanism modification. It is not accurate. It all depends on how CATL designs it. Some netizens even joked that "it takes five minutes to charge to 80%, but it takes 2 hours to fully charge." In the end, what we use to measure charging capacity is battery life. The Kirin battery has a battery life of 1,000 kilometers. Can it really last 800 kilometers after charging for 5 minutes?
unlimited pursuit of charging speed, is it really no problem?
Improving charging speed is certainly a good thing, but this improvement should be based on safety and not damaging the battery. The continuous increase in battery charging will be accompanied by these two phenomena:
1, the charging current is getting larger and larger;
2, the temperature during the charging process is getting higher and higher.
This is also likely to cause some problems. The first is a safety hazard. The high temperature caused by the increase in current increases the vehicle's ability to cause fires. In the past few years, we have occasionally seen spontaneous combustion in new energy vehicles when charging. Part of this is because the charging current causes the battery to heat up abnormally, which ultimately leads to tragedy.
In addition, if the battery charging temperature is too high, it will cause irreversible damage to the battery, accelerate the aging of the battery, and ultimately affect the service life of the battery. Therefore, the charging efficiency of battery should be controlled within a reasonable range, otherwise it will not only be difficult to improve the user experience, but it will have the opposite effect. (Huo Hao)
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