With the widespread popularity of smart devices and smart phones, the use of various mobile intelligent hardware has also placed increasing demands on battery life, and mobile power as an alternative plays an important role in charging mobile smart devices in time. Then it is necessary to purchase a mobile power source with long-lasting durability and fast charging time. How can I buy a good mobile power supply?
Good power, the key has to look at the battery. The battery inside the mobile power supply is like the fuel tank and transmission system of the car. It is responsible for providing continuous power to the entire mobile power supply, which directly determines the good or bad of the mobile power supply. The circuit board of the mobile power supply can be regarded as a control system, which is mainly used for power distribution and conversion, and converts the 3.7V (or higher) voltage provided by the lithium battery into a standard 5V (or higher) voltage. Provide power to the device being charged.
Currently, mobile power batteries generally use lithium-ion batteries, but the performance is different, and the shape is completely invisible, and the general specifications cannot be reflected. Let's start with the battery and explore the mysterious world of mobile power step by step.
Lithium-ion batteries can be classified into liquid lithium-ion batteries (LIB) and polymer lithium-ion batteries (LIP) depending on the electrolyte materials used. The positive and negative materials used in the two are the same. The positive electrode materials include lithium cobaltate, nickel cobalt manganese and lithium iron phosphate materials, and the negative electrode is graphite. The working principle of the battery is basically the same.
The main difference between them is the difference in electrolytes, in which liquid lithium-ion batteries use liquid electrolytes and polymer lithium-ion batteries are replaced by solid polymer electrolytes. Such polymers can be either "dry" or "colloidal" and most currently employ polymeric colloidal electrolytes.
1. Lithium cobaltate (LiCoO2)
Lithium cobaltate is a well-known liquid lithium-ion battery. The common form is 18650 and square shape. The 18650 battery is a cylindrical battery with a diameter of 18 mm and a height of 65 mm (like an enlarged version of the No. 5 battery), which is widely used in laptop batteries. Because it is compatible with laptop batteries, more than 60% of mobile power supplies on the market today use 18650 batteries.
At present, commercial lithium-ion batteries basically use a layered structure of lithium cobalt oxide as a positive electrode material, and its theoretical capacity is 274 mAh/g, and the actual capacity is about 140 mAh/g. It has also been reported that the actual capacity has reached 155 mAh/g.
The positive electrode material has a high working voltage (average working voltage is 3.7V), stable charging and discharging voltage, small volume, high specific energy, good cycle performance, high electrical conductivity, simple production process and easy manufacture.
Main advantages: mature technology, wide range of applications, small size.
The main disadvantages: the cycle life is about 300 times, the safety performance is low, the overcharge resistance is poor, it is not suitable for high rate charge and discharge, and the environment is polluted after being discarded.
Second, nickel cobalt manganese (LiNiCoMnO2)
Nickel-cobalt-manganese, also known as ternary material (LiNiCoMnO2), is a kind of polymer lithium-ion battery. The common form is the shape of a square soft pack. Note that lithium cobaltate can also be made into a square shape, but it is hard after molding and can be distinguished by pinching it by hand.
With the popularity of smart phones in the past two years, ternary materials have developed rapidly and used more and more fields. It uses nickel salt, cobalt salt and manganese salt as raw materials, and the ratio of nickel cobalt to manganese can be adjusted according to actual needs.
The battery with the ternary material as the positive electrode has higher safety than the lithium cobalt oxide battery, and the service life is higher than that of the lithium cobaltate, reaching a cycle life of 500 cycles.
Main advantages: volume diversity, wide range of use, not easy to explode, high safety factor.
The main disadvantages are: high price, polluted environment after disposal, and high current charge and discharge performance is weak.
Third, lithium iron phosphate (LiFePO4)
The lithium iron phosphate scientific name of ferroelectric, the biggest difference between the two types of batteries in the first two is that the positive electrode of the battery is added with iron. Iron lithium has only just begun in recent years. It is a promising material whose safety performance and cycle life are incomparable to other materials. These are the most important technical indicators of power batteries. The charging and discharging cycle life is up to 2000 times, and the single-cell battery over-charge voltage of 30V does not burn, and the puncture does not explode.
The large-capacity battery pack made of lithium iron phosphate cathode material is easier to be used in series to meet the needs of frequent charging and discharging of electric vehicles, and has the advantages of non-toxic, non-polluting, good safety performance, wide source of raw materials, low price, long service life and the like. It is the ideal cathode material for a new generation of lithium-ion batteries.
At present, ferroelectric power is mainly used for large-capacity electric buses, signal base station energy storage and large-scale UPS applications. Among them, mobile power and AA batteries have just begun to test water mass production, which makes ferroelectrics gradually in medium and large capacity UPS and small energy storage batteries. Widely used in lawn lamps and power tools.
Main advantages: 2000 cycles of service life, high current charge and discharge, low internal friction and less heat, safe, environmentally friendly and non-toxic.
The main disadvantages: the price is expensive, the digital product field has not been used on a large scale, and the awareness in the minds of consumers is low.
Qiuck deatail:
- Synchronization mechanism for multi-screen playing
- Powerful processing capability
- Comprehensive control plans
- Synchronous and asynchronous dual-mode
- Dual-Wi-Fi mode
Other Hardware Features
- 4 Ethernet ports, loading capacity of each port up to 2,300,000 pixels, with the maximum width of 4096 pixels and maximum height of 1920 pixels
- Wired Gigabit Ethernet
- Stereo audio output
- HDMI Loop
- HDMI input and auto full-screen display
- 2 USB ports allowing for USB playback
- Onboard light sensor connector allowing for automatic and scheduled brightness adjustment
Application:
Movie theaters, clubs, stages.
* Business Organizations:
Supermarket, large-scale shopping malls, star-rated hotels, travel agencies
* Financial Organizations:
Banks, insurance companies, post offices, hospital, schools
* Public Places:
Subway, airports, stations, parks, exhibition halls, stadiums, museums, commercial buildings, meeting rooms
* Entertainments:
Video processor,controller,video controller
Guangzhou Chengwen Photoelectric Technology co.,ltd , https://www.cwleddisplay.com