Summary of lithium battery fast charging technology

Today, the development of smart phones, 8-core processors, 3GB memory, 2K screens are now very common, it can be said that they have the qualifications for hardware and PC computer challenges. But there is one component that has been developing very slowly, and that is the battery, which is only a few years from lithium to lithium polymer. Batteries have become a bottleneck for the further expansion of smart phones. Mobile phone manufacturers are not unaware of the battery problem, but they are trapped by battery technology, which has been trapped for several years, and unless creative new technology emerges, the root of the problem cannot be reached. Most mobile phone manufacturers have gone the other way. Some even widen and thicken the battery to achieve higher capacity. Some people have enough imagination to introduce solar technology into mobile phones. Some vigorously promote wireless charging technology; some develop external protective shell batteries, mobile power; some try to participate in energy-saving mode at the software level, and so on. But these measures are impossible. At the 2015 MWC2015 exhibition, Samsung announced the latest flagship product GalaxyS6/S6Edge, participating in its own super charging technology. According to official data, 10 minutes of fast charging can support 2 hours of video playback. Generally speaking, watching two hours of video consumes about 25-30% of the battery, which means that 10 minutes of charging can consume about 30% of the battery. This turns our attention to fast charging technology, which may be the core of solving battery problems. Various ways to deal with it Fast charging technology is not new. Galaxy S6 super charging sounds good, but it is not a new technology. As early as the MP3 era, fast charging technology has appeared and has been widely used. A typical example is Sony, whose MP3 player can be used for 90 minutes after three minutes of fast charging. Fast charging technology was later adopted by mobile phone manufacturers. But as mobile phones become more and more complex, they must pay more attention to the safety of charging. At the beginning of 2013, Qualcomm launched fast charging 1.0 technology, which is also the first relatively standard fast charging technology in mobile phone products. It is rumored that it will charge mobile phones 40% faster than old phones, which were also used by Motorola, Sony, LG, Huawei and many other manufacturers at the time. However, due to the immaturity of the technology, the QuickCharge 1.0 technology has a relatively flat response in the market. Current mainstream fast charging technology 1. Compared with the latest fast charging 1.0, Qualcomm Fast Charge 2.0 increases the charging voltage from 5V to 9V (maximum 12V) and the charging current from 1A to 1.6a (maximum 3A). High voltage and high current double the output power. Qualcomm official data shows that QuickCharge2.0 can charge 60% of the 3300 mAh battery of a smartphone in 30 minutes. 2. MediaTek Pump Express MediaTek’s fast charging technology has two specifications: PumpExpress and PumpExpressPlus. The former provides fast DC chargers with an output power of less than 10W (5V), and the latter provides chargers. More than 15W (up to 12V) output power. The charging voltage of the constant current section can be adjusted according to the change of the current on the VBUS, and the maximum charging speed is 45% faster than the traditional charger. 3. OPPOVOOC's flash VOOCflash charging technology was launched together with OPPOFind7. Unlike Qualcomm's QC2.0 high-voltage and high-current mode, VOOC uses a step-down plus current mode. The 5V standard charging head can output 4.5a charging current, which is 4 times faster than normal charging. The important principle of completion is to choose an 8-contact battery and a 7-pin data interface. Mobile phones generally use a 4-contact battery and 5-pin data interface, and the extra 4-contact and 2-pin are used for VOOC services. The 2800mAh capacity Find7 can recover from 0 to 75% in just 30 minutes. QC2.0 is easy to popularize, and VOOC is more efficient. Finally, the three fast charging technologies are summarized. Due to the integration of processors and the high market share of Qualcomm processors, the reachability of Qualcomm Quick Charge 2.0 is better than the other two models. At present, there are fewer products using MediaTek Pump Express, and the cost is lower than Qualcomm, but the stability needs to be verified. The charging speed of VOOC flash charging is the fastest among the three technologies, and the low-voltage mode is safer. The disadvantage is that it is now only used for our own products. There are rumors that OPPO will bring the second generation of flash charging technology this year, I don't know if it can be improved. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Knowledge Analysis: How Lithium Batteries Work