The thickness is only one 200,000th of a human hair. Can this magical material save your electric daddy?

Text | Chinese Business Tao Lue Batu Hai

There is a popular joke recently, "Winter is coming, please be nice to your friends who drive electric cars."

The winter in the north gives electric car owners a new dad - an electric dad. In order to survive the winter driving time, electric car drivers have made cold-warming supplies such as certain baby warmers a hot commodity.

Why don’t you turn on the heating and air conditioning? Don’t ask, it’s all their tears. The collapse of electric vehicle power in winter makes them afraid to have any unreasonable thoughts about keeping warm.

Most new energy electric vehicles in China use lithium iron phosphate batteries. After this type of battery enters winter, the low-temperature environment causes the internal resistance of the battery to increase, which in turn reduces the battery's cycle ability, ultimately causing the battery's discharge power to decrease, resulting in problems such as reduced battery power and decreased activity.

In the Northeast region, the battery degradation rate of electric vehicles can even reach 50%.

The risk of electric vehicles often "squatting" in winter always reminds people of the Apple mobile phone that likes to "hibernate" (automatically shut down).

The official announcement points out that iOS devices should be used in an environment of 0-35 degrees Celsius. Using iOS devices in a cold environment in the low-temperature operating range may temporarily shorten the battery life and may cause the iPhone device to Automatic shutdown.

For northern cities such as Beijing, where the temperature this year is colder than the Arctic, it may be a bit difficult for consumers to use their mobile phones outdoors.

Apple’s pride is also a way to protect the mobile phone. The internal temperature control chip allows the mobile phone to automatically shut down at low temperatures, which can extend the service life of the mobile phone.

However, this does not overcome the problem of mobile phones losing power quickly in winter. It only reduces the excessive consumption of mobile phone batteries in extreme situations, because most mobile phone batteries are still lithium batteries, which are similar to those of electric vehicles.

Compared with the era of feature phones, a smartphone consumes too much power. Consumer psychological expectations have changed from ultra-long standby time to enough power for one day, and even require less charging a few times a day.

With the advent of the 5G era, high power consumption will only become more common. For the current smartphone market, the battery has become the shortest shortcoming of the entire smartphone barrel and has become the main contradiction restricting the development of the smartphone market.

In the Android phone camp, manufacturers mainly compete on fast charging and battery capacity.

The newly released Xiaomi 11 is equipped with a 4600 mAh graphene-based large-capacity battery; it supports 55W wired fast flash charging, which can fully charge 100 batteries in 45 minutes, and also supports 50W wireless fast charging Flash charging can charge the battery to 100 in 53 minutes.

Graphene is the thinnest, hardest, and most conductive nanomaterial currently known in the world. Its thickness is 0.335 nm, which is about one hundred thousandth of a human hair.

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Xiaomi mobile phone batteries use graphene conductive agent to replace traditional carbon black conductive agent. The conductivity is 1,000 times that of traditional carbon black materials, which can achieve efficient conduction, reduce battery internal resistance, and greatly improve charging performance.

Xiaomi also took the lead in mass-producing graphene-based lithium batteries in China and applied them to Xiaomi Mi 10.

The mass production application of graphene-based batteries is just one example of Xiaomi’s increased technology research and development in recent years.

In recent years, when many people are still discussing whether Xiaomi has technology, Xiaomi has been immersed in several major things, and the goals are all aimed at product strength.

The establishment of the core device department in 2016 was just Xiaomi’s push to stick to hard core technology.

After that, Xiaomi rapidly expanded its research and development capabilities. The number of engineers in the camera department alone increased sixfold, from the initial 122 to nearly a thousand.

In addition, nine R&D centers have been set up in cities such as Beijing, Paris, Tokyo, and Santiago.

Xiaomi’s slogan is: Wherever there are talents, set up its R&D center.

Today, Xiaomi’s R&D team has more than 10,000 people, and it will expand to 5,000 people in 2021. In the next ten years, Xiaomi’s wish is to continuously add new blood and build Xiaomi into the world’s leading technology company.

Behind Xiaomi’s rapidly growing R&D team is Xiaomi’s increasing investment in R&D.

From 2.1 billion yuan in 2016, it has soared to more than 10 billion yuan in 2020. Behind the steep curve is Xiaomi’s determination to stick to technology and climb to the high end.

From full screen to surround full screen, from 100 million pixels to under-screen cameras... Xiaomi has refreshed the standards of the mobile phone industry time and time again.

Take fast charging technology as an example. Xiaomi did not pay enough attention to it at the beginning, but now it has made full efforts to lead the industry with 120W wired fast charging and 80W wireless fast charging. It only took more than a year!

In the past two years, Xiaomi has been the mobile phone company that has made the greatest contribution to the development of wireless charging technology.

Although graphene-based batteries are good at this stage, whether it is for the mobile phone or electric vehicle industry, the cost of mass production and application of graphene-based batteries to any product is still unavoidable. Big problem.

Therefore, Xiaomi has only successfully applied this technology to mass production on its flagship models. But there is no doubt that only if Xiaomi continues to increase the number of graphene-based batteries for mass production of mobile phones, it will further promote the replacement process of domestic graphene-based batteries and transition "luxury-level" technology to the civilian stage.

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