I. Project design background and overview The Internet of Things is an important part of the new generation of information technology. As the name suggests, the Internet of Things is the Internet connected to things. This has two meanings: First, the core and foundation of the Internet of Things is still the Internet, which is an extended and extended network based on the Internet. Second, its client extends and extends to any item and item for information. Exchange and communication. The Internet of Things is the Internet of Things, where smart homes are part of the Internet of Things. With the continuous improvement of people's living standards, people's requirements for quality of life are constantly improving, and convenience is the eternal pursuit of people. In terms of home entertainment and electrical control, smart homes have outstanding performances, including background music systems, digital network living rooms, home wiring, lighting control and electrical control functions, making people's lives safer in all aspects. Comfortable and simple. At present, the main recipients of smart homes are still some high-end people. The industry believes that the main obstacles to the development of smart homes are the reasons for both price and consumerism. Smart homes are also high-end consumption, and a system can cost tens of thousands of yuan. Although the degree of acceptance and recognition has been greatly improved compared with the past, it is still mainly limited to the high-end people who buy villas and the young white-collar workers who love life and enjoy life. In addition, many people currently have insufficient understanding of the functions of smart home systems, and many designers lack the corresponding professional knowledge to promote to the owners, resulting in some owners who actually need to know nothing about smart homes. However, in recent years, the popularity of smart homes is slowly increasing. With the continuous influx of products from the same industry in China and the intensification of competition with the domestic smart home industry, the publicity has gradually increased and the complementarity has been achieved. In the future, China's smart home should take the road of equal emphasis on quality and service, and the future of smart home development is broad. In the first three quarters of 2013, the number of Internet users in China reached 608 million, and the Internet penetration rate was 45.4%. Based on the above analysis and general considerations, a wireless smart socket based on Shenzhen Lianhua MCU was designed. Users who have installed ADSL broadband can easily connect the socket to the Internet and remote control through the Android client. The socket has four separate sockets that the user can plug into the socket as needed. Each individual socket can be individually set to be turned on and off. It can also be set to turn on or off periodically. At the same time, the wireless smart socket also has the function of overcurrent protection. The maximum power rating of the socket is set by the Android client (four separate The total power of the socket), if the actual rated power is greater than the set rated power, all four separate outlets are closed, and the timing function is turned off, thus preventing the overcurrent from burning the line and avoiding greater losses. Second, the project design principle 1, principle overview The wireless intelligent socket based on the deep Lianhua single-chip microcomputer is composed of a power unit, a power output unit, a control unit, a current collecting unit, a storage unit, a real-time clock unit, a WIFI module, and a mobile phone client. The power supply unit consists of two parts, one is to convert 220V AC input into 12V DC output to provide power for the whole system; the other part is to convert 12V DC power into positive and negative 5V, which is control unit, current collecting unit, storage unit, real time clock Unit, WIFI module provides power. The power output unit controls the opening and closing of the socket to provide 220V power for the appliance to be controlled. The control unit is the core of the entire system and provides control signals for each unit. The current collecting unit is used to collect the current of the socket, and then input the signal to the control unit for current detection to prevent overcurrent. The storage unit is used to store the status of four separate outlets, and the system reads data from the storage unit the next time the system is powered up. The real-time clock unit provides a clock signal for the timing function, and the unit has a backup battery to ensure that the clock unit is properly clocked after the system is powered down. The WIFI module is responsible for the communication between the socket and the wireless router. Before using the port number of the module, port mapping is performed on the wireless router, so that remote control can be realized. The mobile client is based on the Android system and can send commands to the smart socket. After receiving the instruction, the smart socket performs the corresponding operation and returns data to the mobile client.
Low temperature lithium
battery refers to the working temperature under - 20 ℃,to meet different
environment and temperature. YFJ company has designed a lot of this kind of Low Temperature Battery with our own advantages.
1.Dual IC chips, that can anti-shortcircuit, anti-overcharger,
anti-overcurrent, anti-overload
2.Widely
using temperature range, lower temperature Lithium Battery can be operated in
-50°C~+60°C
3.Long
cycle life, more than 500 charge/discharge cycles (0.2C)( 80% capacity remained
). more than 800 times(0.1C charge/discharge
Low Temperature Lithium Battery
Items specification
Charge voltage: 16.8V
Nominal voltage: 14.8V (4S4P)
Initial impedance: 200mΩ
Nominal capacity: 10Ah
Minimum capacity: 9.8Ah
Low-temperature capacity : ≥7.0Ah
When the battery is standard charged, it shall be put into chamber
at ( -40±2 )℃ for 8-16hrs,then
discharged at 0.2C(2A) constant current to10.0V.
Charge current : Standard Charging::0.2C5A (2A)
Rapid charge:1.0C5A C(10A) Max
Charging time : Standard Charging:6.5hours(Ref.)
Rapid charge: 2.5hours(Ref.)
Max.discharge current : 10A(1C5A)
Discharge cut-off voltage :
10.0V
Shelf life :
2 years
Cycle life (0.2C5A/0.2C5A)
: 500 times,≧80%DOD; 500 times, ≧80%DOD
Operating temperature : Charging:
0℃~45℃
Discharging:-40℃~+60℃
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4.The Battery Pack has a high cycle life, which conforms
to the values of low carbon, energy saving and environmental protection
