With the beginning of the 5G era, smart machine users have higher requirements for device shipping. But OPPO clearly has a better technology reserve than its competitors, which is faster, safer, and more convenient SuperVOOC 2.0 flash-filling technology. Dutch technology blog LetsGoDigital points out that while 5G smartphones are faster connected, mobile phone power and temperature control are also under greater pressure.
Faster networking leads to more compelling use scenarios such as HD video calling and online gaming, and OPPO was one of the first manufacturers in the Netherlands to offer 5G smartphones (Find X2 / X2 Pro).
The company is known to consumers with VOOC and SuperVOOC flash charging technology, and its flagship model is equipped with a 65W SuperVOOC 2.0 flash charging source adapter. It’s a 4200 mAh battery in just 38 minutes.
(Picture via LetsgoDigital)
In a recent article published on the IEEE Computer Association website, the OPPO Institute highlighted the importance of charging technology in the 5G era.
The point is that 5G can create a new mode of use, equipment to affordable, safe, long-range and other aspects of efforts, and batteries are an important foundation of the overall experience.
In recent years, OPPO has implemented a series of innovations to create a more easy, convenient, safe and efficient battery solution.
Looking back at the nickel-cadmium era, lithium ions quickly became the first choice for almost all mobile devices, with the balance of safety and charging speed, although they had few safety risks.
The charging process of ordinary lithium-ion battery is divided into three stages, namely low pressure precharge, constant current, and constant pressure. However, the presence of intra-battery resistance and electrical resistance can cause long wait times to complete charging.
To overcome this problem, the charging system needs more precise control of voltage and current so that the system can accurately compensate for current drops caused by intra-battery resistance and resistance. This increases voltage, current, and charging speed without damaging the battery.
The main safety problem with lithium-ion batteries is that the voltage is too high when charging. Traditional surge protection devices can cut off MOSFET when it is close to risk, but the reliability of this mechanism is another problem.
OPPO Find X2 Pro – Charging Demo (via)
OPPO’s VOOC flashing scheme includes a fuse in addition to the activation circuit. The tight circuit structure and low internal resistance provide more reliable circuit protection.
In conventional charging systems, chargers, control circuits, and batteries all operate independently of each other and do not inform each other of their status, making it difficult to identify potential hazards in “stupid” charging circuits.
However, the system developed by OPPO creates redundant communication for chargers and battery management systems (BMS) so that different parts of the circuit can exchange information in seconds.
In this way, the power adapter can know the level of power required for the battery system and get feedback on the degree of energy absorption to assess whether electrical energy is fully absorbed by the battery electrolyte.
When the adapter detects an increase in impedance and the output power is more likely to be converted into harmful heat, the circuit is secured through an independent power-off management mechanism, and the battery system accurately reports the required current and voltage levels to the charger.
By comparing the adapter output with the energy level absorbed by the battery, the impedance level between the charger and the battery (connectors, semiconductor components) is continuously monitored, and the charging system maintains the overall range within the acceptable parameters, even if the impedance increases.
This means that the charger can maintain a high output power, making the charging rate more constant. If the impedance of an assembly exceeds the limit, each component of the charging circuit switches to protection mode to avoid a malfunction or safety hazard (such as overheating the plug).
The intra-battery resistance is continuously monitored and the output voltage is checked for minor changes to determine if the battery has been physically damaged. This is done by the Battery Management System (BMS), which continues to work even if the battery is removed from the device.
Damage can also be recorded if the battery experiences external force squeeze or puncture, or if the internal physical structure changes. The relevant signal will be sent to the device system indicating that you can no longer charge or continue to use the food. At this point, excess charge in the battery is drained to ensure the safety of the damaged battery.
Looking ahead, OPPO hopes that VOOC flash-charging technology, introduced in 2014, will benefit more consumers. Today, the company has more than 1,800 patents worldwide, based on VOOC, SuperVOOC, and wireless VOOC flash-filling solutions, which are used by more than 145 million people worldwide.