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1、南京康尼科技有限公司多功能太陽能電源教學方案1Doc documents may have a poor browsing experience at the WAP end. It is recommended that you choose TXT, or download the source file to the native view.Multifunctional solar experiment box schemeA preface,The size of the photovoltaic system and application forms, such as syste2、m size span is very big, small to 0. 3 2 w solar garden light, big to MW of solar photovoltaic power station. Its application forms are diverse, and can be widely used in various fields such as home, transportation, communication and space application. Although the size of the photovoltaic system va3、ries, the structure and the working principle are the same Contains several of the main components in pv systems: photovoltaic phalanx: component by the solar cell components (also called photovoltaic cell components) on the demand of the system in series, in parallel, in the sunshine of a too conve4、rting solar energy into electrical energy output, it is the core component of solar photovoltaic system Battery: the solar battery components to produce electricity, or in the evening, or when insufficient light load demand is greater than by electricity, solar battery components will be stored ener5、gy release the energy to meet the load demand, it is the energy storage component of solar photovoltaic system. Currently used is a lead-acid battery, solar photovoltaic systems for higher requirements of the system, usually by using deep discharge valve control type sealed lead acid battery, deep d6、ischarge liquid absorption type lead-acid battery, etc Controller: it for battery charge and discharge condi lions of regulation and control, and according to the load of the electric power demand control sun ChiZu parts and battery to the load power output, is the core of the whole system control p7、art With the development of solar photovoltaic industry, the function of the controller is getting stronger and stronger, with the traditional control part, inverter, and monitoring the trend of system integration, such as AES SPP and SMD series controller is integrated with the above three kinds of8、 functions. Inverter: in a photovoltaic solar power supply system, if contain ac load, then use the inverter device, will have a de or battery solar battery components, release the de into ac load needsThe basic working principle of solar photovoltaic power supply system is under the irradiation of 9、the sunlight, the solar battery components the energy generated by the controller to the control of battery or in the case of meet the demand of the load directly to the load power supply, if the sun Or is the battery at night under the control of the controller to de load power supply, for photovol10、taic systems contain ac load, also need to increase the inverter to convert direct current (de) to alternating current The application of photovoltaic system has many forms, but its basic principle is different For other types of pv systems is on the control mechanism and system components according11、 to the actual need to be different, type A AC220V, all the way along the DC 12V, ac/dc output at the same time, can be used for lighting, lighting, mobile phone recharge, powering A small home appliance, or as an emergency power supply. Especially for field operations, tourism, border posts, inland12、 river ships, the place that can be used as teaching AIDS, can also be used in the power failure as an emergency power supply.According to the users requirement, this scheme is supported by the theory of applied electronic specialty to facilitate teaching, and puts forward the following ways to choo13、se the basic principle of photovoltaic power generation. General common basic structure and principle of photovoltaic power supply, is the use of sunlight converts it to electricity, the control device or directly to the power supply system, basic system structure as shown in figure 1 below:Figure 114、 cell component is composed of multiple single crystal (or polycrystalline silicon, amorphous, etc)cells series-parallel and after encapsulation, and one of the single crystal cells is to the suns light absorption photovoltaic effect produce certain voltage, current, the photovoltaic cable, sent to 15、the controller The controller is a monitoring device for automatic charging and electricity When the battery is full of electricity, it will cut off the charging circuit and make the storage pool not overcharged If the battery power decreases, it will automatically recharge When the battery is disch16、arged to the specified amount of electricity, when it is discharged,It will automatically shut off the power supply circuit, and the battery will not discharge too much When the electricity is increased, it will automatically restore power Support for fixed light battery with, and can be adjusted ac17、cording to the environmental component of Angle in order to achieve the best position to absorb sunlight For storage battery components, it will photovoltaic power of storage, for electricity at anytime when necessary. The configuration of the above parts is connected by wire cable to form a light p18、ower system.Second, the inverter2.1 overviewInverters also refer to inverters as a transformer that turns direct current into alternoting current, an important component of solar and wind power With the rapid development of microelectronic technology and power electronics technology, contravariant t19、echnology has also been driven by direct current motorWay of the rotation of the ac generator inverter technology and development to the 60 s and seventy s of the 20th century thyristor inverter technology, and the inverter technology of the 21st century most USES MOSFET, IGBT, decision, IGCT, MCT a20、nd other advanced and easy to control the power device, control circuit is developed from analog integrated circuit to the single-chip microcomputer control and even controlled by digital signal processor (DSP) All kinds of modern control theory such as adaptive control, self-learning control, fuzzy21、 logic control, neural network control and other advanced control theory and algorithm are also a large number of applications in the field of inverter It also has an unprecedented range of applications, ranging from milliwatt-sized liquid-crystal-backed photovoltaic panels to megawatt high-voltage 22、de transmission stations From daily frequency conversion of air conditioning, frequency conversion refrigerators to airborne equipment in aviation; From conventional fossil-powered coal-fired power plants to solar-powered wind turbines that generate electricity from renewable sources, inverses are n23、ecessary. Without doubt, with the development of computer technology and all kinds of new power devices, inverter device will also to a smaller volume, higher efficiency and performance index is superior in the direction of development Inverter is through semiconductor opened and shut off the power 24、switch, the de can change into ac power of a device, the reverse of rectifier transform Converter and inverter technology according to the output waveform, the main circuit topology structure, output phase several methods such as classification, there are a variety of inverter, specific as follows: 25、according to the output voltage waveform classification: (square wave inverter, sine wave inverter, staircase inverter); According to the main circuit topology classification: (push-pull inverter, half bridge inverter, full bridge inverter); According to the frequency classification of output altern26、ating current: (low frequency inverter, frequency inverter, medium frequency inverter, high frequency inverter);2. 2 the development trend of contravariant technologyThe principle of the inverter technology has been studied as early as 1931, the United States from 1948 Westinghouse electric company 27、developed the first 3 KHZ induction heating inverter has been nearly 60 years history, and the birth of the thyristor SCR create conditions for the development of the sine wave inverter, in the 1970 s, can turn off thyristor (decision), power transistor (BJT) makes the advent of inverter technology 28、development and application. In the 1980 s, the power field effect tube (MOSFET), insulation grid transistor (IGBT), MOS controlled thyristor (MCT), and the birth of electrostatic induction power device for the inverter in the direction of the large capacity development laid a solid foundation, so t29、he development of power electronics device for high frequency inverter technology, large capacity created the conditions In the course of 80 years, the inverter technology has been developed from the low speed device and low switch frequency to the adoption of high-speed device The inverter，s volume30、 is further reduced, the reverse efficiency is improved further, and the quality index of the sine wave inverter is greatly improved On the other hand, the development of microelectronic technology has created a platform for the practical application of contravariant technology, and the traditional 31、inverter technology needs to be developed Through many discrete components or analog integrated circuits, the amount of information needed to process is increasing as the complexity of the contravariant technology increasesAnd the birth of the microprocessor just meet the requirement of the developm32、ent of inverter technology, from 8 to 16 bit single chip microprocessor with PWM mouth, development to today，s 32 bit DSP devices, advanced control technologies such as vector control technologyThe technique of multi-level transformation, repetitive control and fuzzy logic control have been applied 33、to the inverter domain In a word, the development of inverter technology is with the power electronic technology, microelectronics technology and the development of modern control theory and development, the 21st century, the frequency inverter technology is toward a higher, more power and higher ef34、ficiency, smaller in the direction of development.The main technical indicators of the inverterInverter has many important indicators, is introduced as follows: 1) the rated capacity (2) rated power (3) 4) inverter output power factor efficiency 5) rated input voltage and current 6) rated output vol35、tage, current) voltage regulation 8) load regulation 9) harmonic factor 10) total harmonic distortion rate 11) distortion factor peak son number 12)2.4 single-phase voltage source inverterVoltage source inverter is the way according to the control voltage direct current (de) can change into ac power36、, inverter technology is the most common and simple one, below, from the perspective of the single-phase voltage source inverter, and distinguished Alternating current (ac) can be learned from a de power supply, there are a variety of ways, but you should use at least two power switch device, single37、 phase inverter has push-pull, half bridge, bridge type three kind of circuit topology structure, if every half cycle power frequency only 6 out of a pulse, we call it the square wave inverter, if every half cycle with multiple pulse width, and accord with sinusoidal pulse width modulation (SPWM), i38、s referred to as the sinusoidal pulse width modulation output The method of square wave inversion is essentially a single pulse modulation technique, which describes how it works Push-pull inverter circuit diagram 2-1 is the topology of single phase push-pull inverter, which is powered by two polesF39、igure 2-1 push-pull circuit topology element and a primary step up transformer with a center tap, if ac load as pure resistance load, when t t2 or less or less VT1 power tube and gate drive signals Ugl, VT1 conduction, VT2 cut-off, transformer output induction of positive voltage; When t3 t t4 or le40、ss or less VT2 Ug2 power tube and gate drive signal, VT2 conduction, VT1 cut-off, sensing the negative voltage transformer output end, waveform as shown in figure 2-2, if load is perceptual load, the transformer in the continuous current waveform, the output voltage and current waveforms, such asFig41、ure 2-2 push-pull circuit waveformFigure 2-3 push-pull circuit perceptual load waveform as shown in figure 2-3, push-pull inverter output with just two states where VO + and 一 where VO, essentially dual polarity modulation, by adjusting the duty ratios of VT1 and VT2 adjust output voltage Push-pull 42、square wave inverter circuit topology structure is simple, two power tube for us to drive, but power tube switch voltage de voltage for 2 times, so especially suitable for the occasion of applied to the de bus voltage is lower. In addition, the utilization of transformer is low, and the driving perc43、eptual load is difficult The topology of the half-bridge inverter circuit is shown in figure 2-4, the central point of the two series capacitors is the reference point,Figure 24 and a half bridge circuit topology structure When switching element VT1 conduction, energy release to the load on the capa44、citor Cl RL, when VT2 conductivity, capacitance C2 energy release to the load on the RL, VT1 and VT2 conduction in turn on both ends of the load for the electricity, communication and a half bridge inverter electric road in power switch components are conducting a Ud, de power supply voltage, the vo45、ltage at the ends of the capacitor Cl and C2 are based on Ud / 2 (assuming the Cl 二 C2), so the power device VT1 and VT2 is under the current 2 id. Essentially single-phase half bridge circuit and the previous section discussed single-phase push-pull circuit on the circuit structure is dual, readers46、 can analyze the working process of half bridge circuitA half bridge inverter circuit structure is simple, because of the role of the two series capacitor, won，t produce magnetic deflection or de component, after a very proper drive transformer load, when the circuit working in the power frequency (47、50 or 60 hz), capacitance must select larger capacity, make the rising costs of the circuit, so the circuit is mainly used for high frequency inverter3, single phase full bridge inverter circuit Single phase full bridge inverter circuit is also called H bridge circuit, the circuit topology structure48、 as shown in figure 2-5, by the group into two and a half bridge circuit, with 1800 square as an example, working principle of single phase full bridge circuit, power switching element Q4 and QI complementary, Q2 and Q3 complementary, QI and Q3 when conducting at the same time, the load voltage U0 二49、 + Ud; When Q2 and Q4 are at the same time, load two ends U0 二-ud, QI Q3 and Q2 Q4, and the load will be exchangedFigure 2-5 single-phase full bridge circuit topologyFigure 2-6 total bridge output voltage, current waveformAssumes that the load is inductive, that is, load current and the voltage behi50、nd Angle, Q1Q3 power tube grid, combined with the drive signal, after due to the current with the DI D3 is still in the conduction postproduction phase, when after y electric Angle, current zero, the power to the load transmission of active power, the same as Q2 Q4 and gate drive signals D2D4 state 51、is still in the stream, the energy from the negative feed back to de side, again after y electric Angle, Q2 Q4 truly through the current The single phase full bridge circuit working condition Q1Q3 and Q2Q4 half a cycle, the output voltage waveform is 180 degrees of square wave, in fact this kind of 52、control mode is not practical, because in the actual output voltage of inverter power supply require, can control and adjust the following the adjustment of the output voltage method, the phase shift voltage regulating method and pulse width regulating method. Phase 3.1 shift pressure methodFigure 253、-7 for phase-shifting control principle, QI Q4 interlock, Q2 Q3 interlock, and 180 C square wave signals, but Q1Q4 bridge arm and the square wave and square wave of Q2 Q3 bridge arm phase stagger CAngle,Figure 2-7 shifts the control principleAssumes that the load power factor between （0、1）, lags beh54、ind the voltage and current a certain Angle, the phase-shift circuit can be divided into six different work periods: the first time: active output mode, the output voltage and current are positive 一 QI Q3 conduction The second time, stream mode, zero voltage but the current is positive - QI Q2 condu55、ction The third time: feedback mode, with a positive voltage is negative but current - D2D4 conduction The fourth time: active output mode, voltage negative current negative 一 Q2 Q4 conduction Fifth time: stream mode, zero voltage but the current negative 一 Q4 D3 con duction Sixth time: feedback mod56、e, the voltage is positive but the current negative - D1D3 conduction using phase shift control method to adjust the output voltage by adjusting the phase shift Angle y, because of the four power switch components and four fly-wheel diode tube symmetric work by turns, so that each device on the equa57、l stress symmetry, advantageous to extend the life of the device The control waveform of the pulse width adjustment of the pulse width is shown in figure 2-8, which is the triangle of the Uc with a de reference level with a value of UrThe wave carrier signal is compared, and the base drivers of QI Q58、3 and Q2Q4 are obtained, with QI and Q4 complementary When the Uc changes within a range of 0 to 1, the pulse width can vary from 0 to 1800, which changes the output voltage Figure 2-8 shows the power switch of the H bridge7 in the control of the H bridge at the same time leading and closing, four p59、ower switches in the range,Interval,In this case, if the load power factor is between (0 1),Fly-wheel diode will complete part of the energy feedback to the de side from the load effect, this way of work in the output only + 1, 1, two states, we call it a dual polarity modulation;In contrast, the si60、ngle-polarity modulation method ensures that the output has a + 1, 0, and -1 stateThe output waveform of a single phase square wave inverter is analyzed by the push-pull, half-bridge, full-bridge inverter output square wave or rectangular wave, as shown in figure 2-9Figure 2-9 rectangular waveform a61、) pulse width of 1800 b) pulse width (1800 - y)Figure 2-9a shows the Fourier series expansion of the square waveIn type I U - the push-pull square wave inverter to measure the voltage on a single winding IN -一 the push-pull square-wave inverter measures the number of turns of the same winding twice;62、 2 N - the push-pull type square wave inverter to measure the winding number of the winding The square wave contains the base wave component of the 4Ui N2 I (N1 PI), which also contains the larger harmonic harmonic (3, 5, 7, 9) components The effective value of this square wave output voltage isThe 63、effective value of the base wave component is zeroThe distortion rate of the square wave output voltage is THDPulse width forThe rectangular wave, as shown in figure 29b, shows the Fourier series for the output voltageThe rectangular wave also contains only the odd harmonics, and the spread of the h64、armonic amplitude with the pulse width change, when the pulse width is equal to 1200, 3 times and 3 times as much as several harmonic is equal to zero. The figure 2-9 b shows that pulse width is associated with modulation m, namelyIn the type?，pulse width, m, modulation of the output voltage RMS for65、By type (2 -)4 (2-5) (2-6), the n content of harmonic U2n/ (Ui N2 / Nl), the total harmonic distortion degree of the relationship between THD and modulation m, as shown in figure 2T0. The THD of the rectangular wave varies with the pulse width, even though the pulse width is 1200, THD still has 30%.66、The relationship between the n subharmonic content of the rectangular wave, the total harmonic distortion and the modulation systemSine wave 5, single phase full bridge inverter technology described earlier square wave inverter circuit structure is simple, but the output of the power quality is poor67、er, harmonic component is large, with the development of the power device, sinusoidal pulse width modulation (SPWM) technology has been widely used, SPWM control is in a cycle of inverter output ac power, de can cut into equal amplitude and width according to the sine law of change of pulse sequence68、, the width of pulse sequence is changing with sine wave amplitude of discrete pulse, after filtering by sine wave ac power The sine wave pulse width modulation is divided into single polarity modulation and dualpolarity modulation. 5. 1 single polarity sinusoidal pulse width modulation method For r69、 U reference sine wave with amplitude to c U r U with amplitude, frequency, for c f triangle wave c U more, produce power switch drive signals Single polarity principle of sine pulse width modulation waveform as shown in figure 2-11, 2-11 - a is with two opposite polarity is figure of reference wave70、 and two-way generated power switch drive signal intersection triangular carrier; Figure 2-llb is a full-wave rectifier voltage letter with single phase sine waveWith one-way triangular carrier cross section, and is obtained by inverting power switch drive signal, or directly with reference sine wav71、e and one-way three angular power switch drive signal carrier cross sectionFigure 2-11unipolar sinusoidal pulsewidth modulation SPWMwaveform a)bi-directional triangular carrierFigure 2-11 unipolar sinusoidal pulse width modulation SPWM(continuous)B) a one-way delta carrier reference wave frequency r72、 f determines the output frequency 0 f, and the nu mb er of pulses per half cycle is determined by the carrier frequency c f The output voltage peak is changed from 0 to 2, 1 U N/N I by changing the reference sinusoidal wave amplitude If the JTH pulse width is, then it isThe output voltage is validT73、he number of pulses per half period: J 一一 the JTII pulse widthThe Fourier series coefficients of the calculated output voltage areThe first Angle of the JTH pulse J - the JTH pulse width in half a period of five modulated pulses for example,The relationship between the single polar sinusoidal pulse 74、width modulation harmonic content, THD and modulation system, as shown in figure 2-12, the THD is significantly lower than the multipulse width modulation This type of modulation eliminates all the lower than or equal to 2 p - 1 harmonics, which is 9 times when p is 5.Figure 2-12 unipolar sinusoidal75、 pulse width modulation harmonic content, THD and modulation system relationship5. 4. Practical design of inverter power supply in the previous section introduced the SPWM pulse width modulation waveform and the actual inverter power supply design, can produce only pulse width is not enough, a varie76、ty of inverter design, research and development process is very complex, generally go through the following program6, practical circuit above each section introduces the principle of single-phase inverter device, design, development, and often, with 48 V below, 2 KVA inverter as an example, features77、 and functions of each part, figure 2-19 inverter power supply for a practical, Fl, LI, Cl of the de flat wave and noise filter circuit, Q1Q2Q3Q4 field-effect tube for the power, the L2, as the ac output filter, T1 C2 2. 2 KVA transformer dnd high efficiency, for the output EMI filter, F2 switching 78、power supply by 48 VDC transform into multiple isolated de power supply, there are three road 15 V supply power MOSFET driver circuit, digital signal processor TMS320C2407 3. 3 V supply, + 5 V supply circuits, display and keyboard management the other sensor supply and the fan power supply, TLP250 f79、or MOSFET and IGBT drive circuit, detection circuit of voltage and current adopts hall sensor, of which the core is digital signal processor TMS320C2407 and control softwareThree, the solar charge controllerLead-acid batteries are widely used in solar photovoltaic power systems If people know that t80、he service life of the lead-acid battery and charging or discharge has much to do, as long as in the working process of the solar photovoltaic power systems keep the battery charged, however, also however discharge, can prolong the service life, make its normal work more than 5 years. This section i81、ntroduces the simple solar cell charge and discharge controller, which can effectively prevent the battery from overcharging or dischargingThe circuit structure and circuit structure circuit is shown in the attached diagram Dual voltage comparator LM393 inverting input two (2) feet and 6 feet togeth82、er, and provided by the voltage regulator tube ZD1 reference voltage of 6. 2 V voltage, comparing two outputs and 7 (1) the feet, respectively, the feedback resistance, will be part of the output signal feedback to the same phase input and (5) (3) the feet, thus turn the dual voltage comparator to t83、he double hysteresis voltage comparator, can make the circuit in the relatively near the critical point of voltage won，t produce oscillation. Rl, RP1, Cl, Al, QI, Q2, and JI are the components of charge pressure detection comparison control circuits; R3, RP2, C2, A2, Q3, Q4, and J2 are components of84、 the voltage test comparison control circuit The RP1 and RP2 set the function of charge and voltage Adjustable three-terminal stabilizer LM371 provides LM393 stable 8V working voltage. The rechargeable battery packs 12V65Ah with no maintenance lead-acid battery; Solar cells use A 40W silicon solar c85、ell component, which outputs 17V, 2. 3-a de working voltage and current in standard light DI is a protective diode that prevents silicon solar cells from being used as a power dissipation when sunlight is weak 7. 2 working principle, working principle, when the sun silicon solar cell components of d86、e current through the normally closed contact Jl-1 and Rl, LED1 light, wait for battery charging; K closed, three-terminal voltage regulator output 8 v voltage, start working circuit, over charge voltage detection control circuit and discharge voltage comparison control circuit to test the voltage o87、f the battery is at the same time When the voltage of the storage battery is less than the preset of charging pressure value, the potential of Al potential higher than 6 feet (5 feet, 7 feet output low potential QI closing, Q2 conduction, LED2 light indicates charging, JI, transform their con tact J88、IT position, silicon solar cell components through DI for battery charging The battery fills up,Charging when the terminal voltage is greater than the preset pressure value, the potential of Al potential less than 5 foot 6 feet, 7 feet high output potential QI conduction, deadlines, LED2 extinguishe89、d, Q2 JI release, disconnect the charging circuit Jl-1, LED1, indicator stops charging 7. 3 control principle Worked as a voltage when the voltage of the battery is greater than the preset value, the potential of A2 potential (3 feet higher than 2 feet, output 1 foot high potential the Q3 conduction90、, Q4 deadline, LED3 extinguished, J2 release The normally closed contact j2T closes, LED4 lights, indicates the load workerAs a normal; Voltage of the battery to discharge load will reduce gradually, when reduced to less than the preset voltage of discharge voltage value, the potential of A2 (3) fee91、t below potential (2 feet, 1 foot output low potential to Q3 cutoff, Q4 conduction, LED3 glow discharge instructions too, J2, disconnect, their contact J2T normal lamp LED4 extinguished Another normal closed contact j22 (not drawn in the picture) also disconnects, severing the load circuit and preve92、nting the battery from continuing to discharge Closed K, battery charge.Description of the solar trial equipmentReference picturesThis product is equipped with 10W / 12V solar cell components and 12V / 12AH batteries Size 37 by 31 by 14CM, weighs 9. 51 kilograms One, the td-20a product main function93、 and technical index: 1, equipped with 10W / 12V solar battery pack, provide AC220V / 50W power supply capacity; The built-in 12V / 12AH battery pack will provide DC12V / 2V / 2A / 415h power supply to the outside world. Or AC220V, 30W load work 1. 5 h; LED indicator: the output of the G de, the sol94、ar charge indicator; The command R output is connected to the instructions; It communicates 220V output; Having overcharged and overprotective functions; When charging, when the battery voltage is greater than 14. 4 V, the power supply is overcharged When the discharge is discharging, when the batte95、ry voltage is not equal to 10. 8 V, when the output is communicated, the buzzer will ring and the user will be alerted The ac output will be automatically closed if it continues to discharge to 10 + + 0.3 V. The power supply is protected 5, switch on the panel, can make the choice of ac/dc output Th96、e digital voltmeter on the panel, as long as the de switch is turned on, can only output the de voltage valueSecond, the panel notes:1, on-off -12v controls the whole system shut OFF, 1 ON, 0 disconnecting. 2, OUTPUT DC12V OUTPUT; FUSE FUSE; AMMETEER displays the battery voltmeter; The R output is c97、onnected to the instructions: Y ac 220V output; G de output, solar charge instructions; 6, OUTPUT AC220V ac 220V OUTPUT 7, on-off -220v ac 220V outputThe power supply system should not be hit Please close the box when not in use When the system is not in use, please take on-off 12v to zero position 98、and pay attention to safe electricity 3, the system cannot and the heat source, high pressure, high frequency place, prevent these places to interfere with the system; When the system is under pressure, it should be charged in time When the power supply DC 12V output is matched, be positive and nega99、tive to avoid failure The product is wary of rain spray and collision, so as not to damage the power sourcePlan element price listThe NO. 12 3 4Actual test stationproject Solar cell phalanx trial demonstration box battery luxmeter photovoltaic inverter Intelligent controller of solar energy experime100、ntal documents (draft) (draft) teaching with experimental teaching with directions manuals (first draft) experiment and application guide (draft)Match 10W / 24V 12V 12Ah 30W 30WOne set of 8 knots, 1 set 1 sets 1 set 1 sets 1 set 1 sets 1 set 1intoThe company is the technology of coney technology coN101、ote can be moved or rotatedWhen the first draft of the expansion is completed, it will be paid to the schoolThe reference price (yuan) 520, 960, 840, 1600, 2450, 2500Technical training (7 working days)1 set of6LED intelligent display load A single combined (single combined total solar power price (RMB) But more common) sum (solar power sum (more common)Continuous adjustable15 20 wAnd set up a coney tech pack for coney or school with 9870 81001000Nanjing coney technology industry co., LTD 2010-05-19 one