Photovoltaic power modules are created by linking several photovoltaic cells to make up for the relatively low cell voltage of each individual cell. This approach attempts to harness higher power from the stronger photovoltaic cell, bypassing lower performing photovoltaic cells to extract more power from the string.
photovoltaic power modules are configured as a string of solar cells where the
overall string current is limited by the available current of the
lowest-performing solar cell in the string. External operating conditions such
as dirt/dust accumulation and partial shading can severely impact the available
power from the string. This technology makes an array of solar cells behave as
a single super-cell with its own energy storage to eliminate effects on peak
power tracking efficiency.
technology is a cell-level power balancing scheme that builds on the
concept of differential power processing. The method uses diffusion
charge rebalancing to improve the efficiency of energy capture in the presence of
partial shading, while retaining high power and minimizing the number of external passive components. The technique not
only increases energy extraction, but also improves maximum power point
tracking (MPPT) efficiency under partial shading conditions. This invention does
not require external passive components for intermediate energy storage, but
instead uses the intrinsic diffusion capacitance of the solar cells as the main
energy storage element.
- Removes the complexity of MPPT converters
- Eliminates the binning process during cell manufacturing
- Minimal possible cost for power processing
- Removes cell-by-cell testing basis