1.1 (PL) Power Loss Prediction parameters: PL1, PL2, PL3
This section comprises all PL parameters, displays images to visualize the three formulas and
describes the differentiation of fully and partially separated micro crack defects. The PL prediction
is based on degradation data from research in climatic chambers. Power loss from PL3 is always
higher or equal to PL2 and PL1.
• Use (PL): on/off
Activate or deactivate the power loss prediction.
’on’ = Power loss prediction data is generated for the classification
’off’ = No power loss data is generated for the classification
• PL1: Shipment condition
Use active cracks:
’on’ = Defect areas of active cracks are used in the PL1 prediction scheme
’off’ = Defect areas of active cracks are ignored
Crack: full separation [%]
Crack defects that electrically separate cell parts from the busbars are evaluated by this
defect factor. Two different crack constellations result in a full separation (inactivity) of a cell
part, (see fig. 5 or fig. 7):
1.The cell border and one flanking crack separate a part of the cell
2.Two flanking cracks separate a part of the cell
Micro cracks often show as electrically contacted so long the crack has not separated the
material. Only active crack defects are used in the PL1 formula, (see fig. 2). Micro cracks
without visible power loss are evaluated in PL2 and PL3, (see fig. 3).
Default value=100.0
Range of values=[0.0 to 500.0]
Figure 5: