An industry standard “GaN Charger” implemented on September 11, 2020, has been in operation for two years, and GaN chargers have gradually become the mainstream of mobile phone charging.
This year, Mi released a series of new phones, one of which is equipped with 210W priority fast charging technology, claiming that it only takes 9 minutes to fully charge the phone to 100%, so the charging time of the phone has been officially shortened to single digits. era.
A foreign manufacturer once again crowdfunded GaN chargers, and its power has reached 270W, which once again broke people’s perception of charging.
Fast charging has become an important consideration when buying a mobile phone, but some netizens worry that charging so fast will cause damage to the battery of the mobile phone. . So, does such a high-power fast charge hurt the battery?
The answer is “yes”. The so-called “fast charging” refers to fast charging the mobile phone within 1-2 hours, so that the power of the mobile phone is infinitely close to the “full charging state”, and the service life of the mobile phone battery is related to the length of use, frequency, and environment. It is also related to efficiency. If the mobile phone is often and frequently charged with “fast charging”, this will accelerate the consumption of the service life of the mobile phone battery. The most intuitive impact is the decline in the standby and battery life of the mobile phone.
In theory, any electronic device will gradually lose its useful life even if no one is using it. Mobile phone batteries are consumables, and their service life decline has a lot to do with the use environment, frequency, times, etc. Even if the user uses the mobile phone normally and charges it with a normal charger, its service life will gradually decrease “Fast charging” will accelerate the consumption of battery life, but this is a technology and function of the mobile phone, the purpose is to “shorten the charging time”.
Why are domestic manufacturers obsessed with the continuous development of fast charging technology? In order to meet the load requirements of 5G, large screens and processors, smartphones are bound to be equipped with batteries with larger and larger capacities. But from the current point of view, the battery capacity of the mobile phone cannot increase the volume and weight of the mobile phone too much, and it is difficult to achieve a substantial increase in the energy density in a short period of time without breaking through.
In order to solve the “battery anxiety” of many consumers, mobile phone manufacturers can only find another way to operate on fast charging, and reduce users’ perception of battery life by shortening the charging time.
The battery life anxiety caused by slow charging is also a major pain point restricting the development of the electric vehicle industry. According to agency statistics, in 2021, the average theoretical charging rate of hot-selling models that support fast charging is about 1C, that is, it takes about 30 minutes to charge to achieve SOC30%-80%, and the battery life is about 219km (NEDC standard). In practice, most pure electric vehicles need to be charged for 40-50 minutes to achieve SOC30%-80%, and can travel about 150-200km. If the time to enter and leave the charging station (about 10 minutes) is added, the pure electric vehicle costs about 1 Hours of charging time can only be driven on the highway for about 1 hour.
It is said that the Ningde era already has an ultra-fast charging technology solution, which can charge 80% in 5 minutes at the fastest. Not long ago, the Kirin battery with a long battery life of up to 1000km ignited the market’s enthusiasm for new energy vehicles. The 5-minute ultra-fast charging technology is expected to further solve the battery life and energy replenishment bottlenecks that plague the development of electric vehicles.
In the future, the long battery life and the charging time of electric vehicles will be solved in turn, and new energy technology will reach a new level.