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Test methods for solar panels

Hits:44 comment:0 Date:2016/11/18 13:01:15 tags:全部

test method

(1) because the output power of the solar module depends on the solar irradiance and the solar cell temperature, the measurement of the solar cell module is carried out under standard conditions (STC):

Air quality AM1.5, light intensity 1000W/m2, temperature 25 C.

(2) open circuit voltage: 500W halogen tungsten lamp, AC transformer of 0 ~ 250V, the intensity is set to 3.8~4.0 LUX, the distance between the lamp and the test platform is about 15-20CM, and the direct test value is open circuit voltage;

(3) under this condition, the maximum power output of the solar cell module is called the peak power. In many cases, the peak power of the component is usually measured by a solar simulator. The main factors affecting the output performance of solar cells are the following:

1) load impedance

2) sunshine intensity

3) temperature

4) shadows

Structure composition

1) the role of tempered glass for the protection of the main power generation (such as battery sheet), the choice of light transmission is required, 1 light transmittance must be high (generally more than 91%); ultra white steel treatment of 2

2) EVA used to bond the glass and the main power (such as cell), transparent EVA material directly affects the life of the components exposed in air EVA aging yellow, thus affecting the components of the light transmission rate, thus affecting the quality of power components in addition to the quality of EVA itself, affect the lamination process component manufacturers is very large, such as the EVA glue is not standard, back bonding strength EVA and toughened glass, not enough, EVA can cause premature aging, affect the component life.

3) the main role of the battery is to generate electricity, the main market is the main market of crystalline silicon solar cells, thin film solar cells, both of which have advantages and disadvantages. Crystal silicon solar battery, the equipment cost is relatively low, but the battery consumption and the cost is very high, but the photoelectric conversion efficiency is high, suitable for power generation in the outdoor sunshine; thin film solar cell, the relatively high cost of equipment, but the consumption and cost of the battery is very low, but the photoelectric conversion efficiency of crystalline silicon solar cells is relatively a little more than half but, weak light effect is very good, can also generate electricity in ordinary light, such as a solar battery on the calculator.

4) EVA function as above, the main bonding packaging power generation and backplane

5) back, sealing, insulation, waterproof (generally used TPT, TPE and other materials must be resistant to aging, most of the components manufacturers warranty of 25 years, toughened glass, Aluminum Alloy generally no problem, the key is in the back with silica and whether they meet the requirements.)

6) aluminum alloy protective laminate, a certain seal, support role

7 junction box to protect the entire power generation system, plays the role of the current transfer station, if the component short circuit connection box automatically disconnect the short circuit battery string, to prevent the burning of the entire system. Terminal box is the key to the selection of the diode, according to the different types of battery pack, the corresponding diode is not the same

8) silicone seal, used to seal components and aluminum alloy frame, components and junction box junction. Some companies use double-sided adhesive tape, foam to replace silica gel, the domestic use of silica gel, the process is simple, convenient, easy to operate, and the cost is very low.


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