Photovoltaic 0BB Technology: The battle between efficiency and cost, an inevitable trend in the wave of technological upgrades
Over the past decade or so, the photovoltaic industry has experienced vigorous development, with costs rapidly decreasing. Photovoltaic power generation has gradually evolved from supplementary energy to alternative energy. Behind this, continuous technological progress has been the key driving force. From the early 2BB and 3BB to today's SMBB and 0BB, the evolution of photovoltaic cell technology has always revolved around the two core objectives of improving efficiency and reducing costs.
Looking back at the development of the main grid technology of photovoltaic cells, it is not difficult to find that the main trend is to increase the number of main grids and reduce their size. This is because although the main grid is responsible for collecting the current, it also blocks the light absorbed by the cell, resulting in efficiency loss. Therefore, as the industry has developed from 2BB and 3BB to MBB (9-15 grids) and then to SMBB (16 grids and above), the main grid lines have become increasingly fine to reduce the shading area and improve efficiency.
However, SMBB technology also faces a bottleneck. Thinner busbars mean higher difficulty and cost of welding. In this context, 0BB technology came into being, which completely eliminates the busbar and directly uses the ribbon to connect with the thin grid lines, fundamentally solving the shading problem and pushing efficiency improvement to new heights.
The advantages of 0BB technology are obvious:
Of course, the application of new technologies also comes with challenges. At present, there are four main process routes for 0BB technology: direct film lamination, SmartWire, dispensing, and soldering and dispensing. Each route has its own advantages, disadvantages, and applicable scenarios. For example, direct film lamination technology is highly efficient and reliable, but requires additional equipment investment; SmartWire technology provides strong soldering, but has higher material costs; dispensing technology is less expensive, but process stability needs to be improved; soldering and dispensing technology combines the advantages of the two, but requires high soldering accuracy.
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Currently, 0BB technology is in the early stages of industrialization. Leading companies such as Jinko Energy and Risen Energy have already begun mass production, but large-scale promotion still faces challenges in terms of yield, cost, and process maturity. In the future, with continuous technological progress and further cost reductions, 0BB technology is expected to become the mainstream technology route for photovoltaic cells.
From the perspective of industry development, the emergence of 0BB technology is an inevitable trend under the wave of technological upgrading in the photovoltaic industry. It is not only a game of efficiency and cost, but also a subversion and innovation of traditional processes.
In the future, with the maturity and application of 0BB technology, it will further promote the decline in the cost of photovoltaic power generation, accelerate the process of grid parity for photovoltaics, and make a greater contribution to achieving the goal of “carbon peak and carbon neutrality”.
At the same time, the application of 0BB technology will also drive the upgrading and development of related industry chains. For example, it will create new demand for higher-precision, higher-speed stringers, thinner and more reliable ribbons, and better-performing fixing adhesives and films, bringing new development opportunities to related enterprises.
In short, 0BB technology is an important milestone in the technological progress of the photovoltaic industry. Its emergence will promote the development of the photovoltaic industry in the direction of higher efficiency, lower cost, and greater reliability, injecting new impetus into the global energy transition.