Solar Power Battery Packaging Process

The packaging of solar power batteries has gone through three phases: the first generation of RTV silicone rubber encapsulation; the second generation of polyvinyl butyral (PVB) packaging; the third generation of ethylene - vinyl acetate copolymer (EVA) package. EVA package is currently the industry's most important process, a detailed analysis of the use of EVA packaging solar cell module structure; specific packaging process. Crystalline silicon solar power batteries components manufacturing process of each procedure described as follows.

Cell sorting and welding, the performance of similar single-cell combination into components, to minimize the loss in series, usually a low-power battery will reduce the output power of the entire component. Appearance Check the color, grid line size is normal. The interconnection is soldered to the negative pole of the lifepo4 battery. It is required that the welding be straight and firm. The welding strip should not fall off by hand along the direction of 45 °. The high welding temperature and excessive time will lead to low tear strength Or battery fragmentation.

Chip connection, will have a good single-chip batteries connected in series, and electrical inspection, require a series of solar power batteries spaced evenly, the same color.

Layer, in the cloth water white glass on the shop layer, and then have a good battery with a solder string connected with the convergence zone, and then paved and a layer of plastic, and then the introduction of electrical inspection later, stand-by.

Laminated packaging, the laminated lifepo4 battery components into the vacuum hot sealing machine, the required laminated components within the single-chip battery without fragmentation, no cracks, no significant shift in the component's edge and any part of the circuit Between the bubble-free or delamination channel, EVA glue even good.

The frame package encapsulates the laminated lifepo4 battery components for engineering installation.

Component testing, according to the process standard detection of solar cell components sorting. International see 0 standard test conditions: AM1.5,100MW /m2, 25 ℃. Requirements: Detect and list the following parameters: open circuit voltage, short circuit current, operating voltage, operating current, maximum output power, fill factor, photoelectric conversion efficiency, series resistance, parallel resistance and I-U curve. Finally, the lifepo4 battery pack has been measured to install the junction box.

Component packaging and storage, according to the results of test sub-sub-tag after the PV modules can be packaged into the storage.

When the assembly temperature is higher than the standard working temperature of 25 ℃, the efficiency of the component decreases, mainly in the open circuit voltage drop. As the temperature increases, the shape of the volt- ampere characteristic curve is essentially constant, but the entire translation to the left indicates that the open-circuit voltage decreases with increasing temperature. The effect of a cell in the module on the performance of the entire assembly, If a lifepo4 battery is completely obscured in the assembly, the power loss of the entire assembly can be as high as 75%. Of course, there are some components of the shadow less affected than this case.

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