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4BB VS 3BB MAY 2015
Juan Carlos Gonzalez, Sr Technical Service Manager [email protected] +41 791921579
4 BUS BAR
2 www.jinkosolar.com
Introduction to 4 Bus bar cells
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- 4 BB - 3 BB
4BB APPLICABLE TO THE WHOLE PORTFOLIO (STANDARD, EAGLE, EAGLE+ AND SMART)
3 BB PHASE OUT ALONG Q2 AND GRADUAL PHASE IN FOR THE 4BB CELLS
Q3 FULL AVAILABILITY FOR 4BB CELLS
Introduction to 4 Bus bar cells
www.jinkosolar.com 4
- 4 BB - 3 BB
• 1% reduction on CtM losses
• Japanese 3BB cell patent circumvention
• Reduction of microcracks impact and soldering stress
• Automatic soldering
Improvement
Introduction to 4 Bus bar cells
www.jinkosolar.com 5
- 4 BB - 3 BB
• Maximum collection area (shadow factor)
• Minimum electrical resistance
Compromise
Bus bar needed to reach an specific shadowing factor
Fixed fingers
Introduction to 4 Bus bar cells
www.jinkosolar.com 6
- 4 BB - 3 BB Series resistance
Introduction to 4 Bus bar cells
www.jinkosolar.com 7
- 4 BB - 3 BB Series resistance
IT MAINLY AFFECTS TO THE FILL FACTOR. Reducing the Rs we can improve the FF and therefore the Pmpp
Introduction to 4 Bus bar cells
www.jinkosolar.com 8
- 4 BB - 3 BB Series resistance
IT MAINLY AFFECTS TO THE FILL FACTOR
Introduction to 4 Bus bar cells
www.jinkosolar.com 9
- 4 BB - 3 BB 3BB Vs 4BB
LESS SPACE BETWEEN BUSBARS
GRIDLINE INTERCONNECTION
THINNER BUSBAR
Introduction to 4 Bus bar cells
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- 4 BB - 3 BB 3BB Vs 4BB
SHORTER CURRENT PATH LEADING TO HIGHER POWER OUTPUT
Introduction to 4 Bus bar cells
www.jinkosolar.com 11
- 4 BB - 3 BB 3BB Vs 4BB
REDUCTION OF CRACKS IMPACT
d D
Introduction to 4 Bus bar cells
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- 4 BB - 3 BB 3BB Vs 4BB
LESS STRESS DUE TO THE SOLDERING MINIMISING THE POSSIBILITY OF CRACKS AND LEADING TO HOTSPOT REDUCTION
