In the current era of more and more frequent mobile phone applications, the battery life of mobile phones is more and more important. Fast charging of mobile phones is also the goal of major manufacturers. But when it comes to fast charging technology, we have to mention OPPO. OPPO has been deeply involved in the field of mobile phone fast charging for many years. From the earliest charging of 5 minutes and two hours of talking, to the SuperVOOC equipped on OPPO Find X last year, OPPO has a leading position in the field of mobile phone fast charging innovation and technology.
Super VOOC Flash Charge
At present, the fastest fast charging technology on the market generally only has a charging power of 18 to 20W, but Super VOOC flash charging has an amazing charging power of 50W (10V/5A). Even more powerful is that the OPPO Find X Lamborghini Special Edition has a 3400mAh (dual 1700mAh) battery. It only takes 35 minutes to charge from 0 to 100%, and Super VOOC only takes 35 minutes, which is twice the speed of the current top fast charging on the market, just like the speed of the Lamborghini sports car. 0 to 100 KPH acceleration. Super VOOC flash charging keeps the industry's first charging speed while minimizing heat generation, protecting the battery and improving charging safety.
The principle of the VOOC flash charging scheme is to increase the current with constant voltage, but this method has been improved. Their method is to increase the current to 4.5A with constant voltage and high current, thereby speeding up the speed.
The charging process of a conventional mobile phone is that the adapter steps down the 220V alternating current to 5V direct current, and adjusts it to about 4.2V through the charging control circuit on the mobile phone side to charge the battery. It is often said that the phone will heat up when charging). VOOC flash charging technology transplants the charging control circuit to the charger, and transplants the heat source to the adapter to transfer the heating problem of the mobile phone.
The charger for VOOC flash charging also has a special chip called MCU chip, which replaces the charging control circuit in traditional charging. This chip can automatically identify whether the current charging device supports VOOC flash charging. In addition, its charging port, although it is also MicroUSB, has 7 pins, and the battery is also specially made, with 8 contacts.
Special adapters, batteries, data cables, circuits, and interfaces, all of which are satisfied, can turn on flash charging and achieve 4.5A high-current output and input. If no support is detected, it will automatically use a stable charging current for slow charging.
The safety of VOOC fast charging
According to the current mainstream fast charging technology, Xiaomi mainly uses Charge Turbo charging technology, such as the Mi 9 series, while Huawei uses SuperCharge charging technology, such as Huawei P30 series, Meizu uses mCharge Technology, such as the just-released Meizu 16S mobile phone, Samsung is more conservative and has been using its own AFC charging technology. Overall, OPPO Reno's VOOC3.0 fast charging technology is the most efficient and safe among the current mainstream flagship phones.
Why do you say that? Because, no matter it is Samsung, Huawei, or Xiaomi, or what kind of fast charging technology, the basic principle is to increase the voltage input to the mobile phone and keep the input current unchanged. I have seen other manufacturers' fast charging technology technology After the principle, it is not difficult to find that most of them use high-voltage charging. Although this charging method is relatively efficient, the heat of the mobile phone cannot be controlled. Sometimes it will be hot to the touch, and the wear and tear of the battery will be high. The low-voltage and high-current used by OPPO has low heat generation and higher efficiency. It keeps the mobile phone from heating up while charging quickly, and the protection of the battery is also in place, so the charging experience is even better.
However, Oppo Flash Charge will only work when charging the Oneplus device with the included wall charger and will not work with any other fast chargers. The wall charger itself controls the current flow to the battery through the charging cable by continuously monitoring the charge level of the battery.
Charging speed
The Oneplus' flash charge claims to charge up to 65% in just 30 minutes (the reference device is the Oneplus 5T with a 3300 mAh battery). Compared to normal charging (5V/1A), it can charge the device from 2% to 100% in 1 hour and 14 minutes.
Highlights and disadvantages of existing technology
Through the above introduction, we can see that the highlight of the current fast charging technology, or the key to the continuous upgrading of fast charging technology, is the charging speed. Regardless of the charging standard used, the technology highlights of the major manufacturers are the increase in charging speed and the reduction in battery size.
However, the existing fast charging technology still has certain defects. For example, high-voltage fast charging is facing the problem that the highest voltage value is extremely difficult to break through, which affects the further improvement of charging speed; while high-power charging brings speed improvement, it will also bring great thermal effect, causing the phone to become hot and the inside of the phone to become hot. Problems such as shortened component life; fast charging still relies on wired devices, which also limits the further improvement of user experience to a certain extent.
