Product & Technology Introduction of Half-Cell Module Technical Service Dept. (Q4 17 Version)
1 MW Technical introduction and Power Roadmap 2 Reliability and Certifications 2
Half Cut Cell Module Compares with Traditional Module Traditional Module Circuit Half-Cut Cell Module Circuit Comments I. Cell : full cell II. Circuit : 60-pieces cell connects in series directly Comments I. Cell : half cut cell II. Circuit : 60-piece half cell connects in series, then 2 circuits connect in parallel. Power Gain 5~10watt 3
Product introduction Product name Half Cell module Cell type Poly (Normal) Poly (MCT) Mono (Normal) PERC Mono Product power(w) Forecast till end of 2018 (12*10)pcs 275~285 280~290 285~295 310~320 (12*12)pcs 325~335 330~340 340~350 365~375 Application Large-scale ground power station Distributed power station 4
Mainstream power of Half Cell module (60cells/12*10) 325 320 315 310 305 300 295 290 285 280 275 270 265 320 315 315 310 310 310 295 295 290 290 290 290 285 285 285 285 280 280 280 280 280 275 275 275 2017 Q3 2017 Q4 2018 Q1 2018 Q2 2018 Q3 2018 Q4 Poly (MCT) Poly (Normal) Mono (Normal) PERC Mono Note: Mainstream power of related module type, but not include the max. power curve. Current power forecast of Mono is based on normal Mono cells but not full-shaped Mono cells. 5
Mainstream power of Half Cell module (72cells/12*12) 375 375 370 370 370 370 370 365 365 360 355 350 345 340 340 345 345 345 350 350 340 340 Poly (MCT) Poly (Normal) Mono (Normal) PERC Mono 335 335 335 335 335 330 330 330 330 325 320 325 325 325 2017 Q3 2017 Q4 2018 Q1 2018 Q2 2018 Q3 2018 Q4 Note: Mainstream power of related module type, but not include the max. power curve. Current power forecast of Mono is based on normal Mono cells but not full-shaped Mono cells. 6
Technical introduction of Half-Cell module Laser scribing Automatic sorting Series soldering I-V test Note: New added technical process which highlighted in red. EL test Visual inspection 7
5BB technology used for Half cell module Shorter current path 4 Busbar 5 Busbar Property of 5BB (Busbar) From 4BB to 5BB, distance between BBs become shorter which reduce internal current loss, to increase module power output finally. 5BB cells have better stress equilibrium and can reduce the risk of micro-cracks. Half-cell modules will be combined with 5BB cells to maximize its power output. 8
The advantage of Half-Cell module Laser scribing I I/2 A B C Key features Lower electric current and internal resistive loss of current mismatch. To enhance output of Power 5W-10W (Fig. A). To enhance light absorption. The space area increased and cells can absorb more reflection light (Fig. B). Less Power loss under shading condition (Fig. C). Due to the lower current, the operating temperature lower than the regular module, could reduce the hot-spot issue. Half-Cell Modules could be used in 1500V PV system, to reduce BOS cost. 9
Mechanical characteristics Module Type Regular Half Cell Regular Half Cell Cell Type No. of cells/ Half-cells Mono/Poly 156*156mm(6 inch) Mono/Poly 156*156mm(6 inch) Mono/Poly 156*156mm(6 inch) Mono/Poly 156*156mm(6 inch) 60(6*10) 120(12*10) 72(6*12) 144(12*12) Dimensions 1650 992 40mm (65.00 39.05 1.57 inch) 1665 992 40mm (65.55 39.05 1.57 inch) 1956 992 40mm (77.01 39.05 1.57 inch) 1987 992 40mm (78.23 39.05 1.57 inch) Weight 19.0kg (41.9 lbs) 19.2 kg (41.9 lbs) 26.5kg (58.4 lbs) 27.0kg (60 lbs) Frame Anodized Aluminium Alloy Anodized Aluminium Alloy Anodized Aluminium Alloy Anodized Aluminium Alloy Junction Box IP67 Rated IP67 Rated IP67 Rated IP67 Rated anode 290mm, anode 290mm, Output Cables 900mm 1200mm cathode 145mm cathode 145mm Note: There s length dimension difference between regular and half-cell modules (highlighted part.) 10
Electric drawings of Half-Cell module For Type JKM310M-60H-V as an example Note : Front Anode cable 290mm Back Cathode cable 145mm The H-cells of the top half and bottom half are connected in series, total 120 H-cells, and then connected in parallel by three-in-one Junction box which include 3 bypass diodes inside the middle of the back side. Optimized cable length will reduce module s CTM and cable loss during operation, to achieve higher project yield. Nextracker can be applied for projects during modules installation Landscape installation requires customized cable length of half-cell Modules depending on PV array design If the customer want to exchange the cable length (Basically for Portrait), it is should be order in advance 11
1 MW Technical introduction and Power Roadmap 2 Reliability and Certifications 12
Appr. 210μm High reliability : Introduction of Laser scribing The back of cell PN junction Depth of laser cut 0.4-0.5μm PN junction position line 219μm Depth of cut 88μm Back side The profile of Half-cell The SEM profile of Half-cell Laser scribing The laser cut from the back side of cell and the depth of cut is about 40-50% of the cell s thickness, the position of PN junction from the front side of cell is about 0.4-0.5μm. As the SME photo show, the smooth area is near the front side of cell, the rough region is laser burning area, and there is enough distance between PN junction to the laser cut area. There is no damage of PN junction during the laser scribing process. 13
High reliability : Hot-spot Test The average ΔT of Half-cell is lower 1.8 than Full-cell s, due to the current of H-cell is decrease to half of the Full-cell s, so it is become lower of the PV module s internal power loss. The operating temperature difference is relatively lower than full-cells, to reduce hot-spot issues. Reference data as followings: Half cell Full cell The temperature data of Half cell and Full cell Series No. Tmax/ Tmin/ ΔT Test date Irradiance(W/m2) 156220170317110136390048 40.2 33.9 6.3 156220170317110136390047 43.8 36.3 7.5 2017/4/1 156220170321110137020007 41.3 32.2 9.1 13:30-14:20 700~800 156220170321110137020010 40.7 32.4 8.3 Half-cell Full-cell 14
Degradation ratio (%) High reliability : Test report of Half-Cell module Internal reliability test Certificated by TUV 5.00% 4.00% All PASS! 3.00% 2.00% 2.03% 1.72% 2.17% 1.89% 1.00% 0.00% TC200 DH1000 TC50+HF10 Mechanical load Testing pass criteria Test standard: IEC61215:2005 There is no visual defect after sample test and its related power degradation are less than 5% 15
Reliability certificate of Half Cell module Certificates status of half-cell module are as following: Certificates 2017-09 2017-10 2017-11 2017-12 2018-03 TUV certificate MCS Certificate CEC Listing UL Certificate CSI Listing PID Certificate Salt Mist Ammonia Sand Dust PAN File report PQP test Completed End of Sep. 1000V: Middle of Sep. 1500V: End of Sep. Complete date End of Oct. Beginning of Nov. Beginning of Nov. Complete date Complete date Complete date Complete date 16
Jinko changes energy structure and undertakes future responsibility! 17