Best Technical Solution for Module Efficiency Improvement-Joy Energy

Stealth Enhanced metallization Interconnection Hangzhou Joy Energy Technology Co., Ltd Contents 5 Contact us 4 Company Culture 3 Cost Analysis 1 About us 2 Products and Technologies Company Introduction  01 Company Profile  02 Company History CONTENTS 01 01 Company Profile  Hangzhou Joy Energy Technology Co., Ltd was established in November 2016. It is jointly established by senior experts and professors in the PV industry. It is located in the National Economic and Technological Development Zone of Xiaoshan District, Hangzhou, adjacent to Hangzhou Xiaoshan International Airport.  It mainly develops and produces new PV module metallization and interconnection equipment, new interconnect materials and high-efficiency technology.  Hangzhou Joy Energy Technology is committed to providing PV companies with the most competitive and efficient PV module technology and integrated solutions. 02 Company History  2018  In May, the third generation automated full-cell stringer with triangular ribbon and the first generation automated half-cell stringer with triangular ribbon were successfully developed.  In March, it was rated as an innovative enterprise by Xiaoshan District, Hangzhou City.  In January, the triangular ribbon module was certified by TUV.  2017  In December, the second generation automated full-cell stringer with triangular ribbon was full developed.  In November, the A-round financing was completed .  In October, the triangular ribbon module was certified UV.  In August, it was rated as “5213” key support project by Xiaoshan District, Hangzhou.  In July, the first generation automatic triangular ribbon full cell tabber and stringer was developed and delivered to customers.  In June, the company’s core technology was certified as an invention patent.  In February, the first-generation semi-automated stringer with triangular ribbon was developed 2016  In November, the company was registered and established Technology Introduction  04 Product description  01 Technical background  05 Power increased  06 Reliability test 02 CONTENTS  02 Technology Introduction  03 Advantages 01 Technical background Industry Status At present, flat ribbons are usually used to interconnect cells. Existing Problems 1.Flat ribbon will bring about 3 of shading loss 2.It is difficult to balance the shading of the ribbon and the internal resistance of the cell, that is, can not balance Isc and FF. 02 Technology Introduction  Stealth Enhanced Metallization Interconnection（ SEMI）  Firstly, optimize the metallization design of cell, improve the utilization of incident light while reducing the internal resistance of the cell, then interconnect cells into string. Conventional 5BB SEMI Appearance of SEMI cell 02 Technology Introduction Is there a shape of the ribbon that can reduce the shading loss and reduce the resistance loss of the module Vertical incident light Oblique light 03 Advantages-Optical advantage Compared to flat ribbons and round ribbons, the triangular ribbon has the following advantages  All vertical incident light and most of the oblique light can be utilized, the light utilization rate is high.  Large contact area with busbar, small interface string resistance, high welding strength  Easy to weld, not easy to cause welding offset The triangular ribbon can utilize almost all of the vertical incident light and oblique light. The flat ribbon cannot utilize all of the vertical incident light and most of the oblique light. The circular ribbon can utilize part of the vertical incident light and a small amount of oblique light. 7BB, 5BB and 12BB module resistance losses 5BB Module 9.1 12BB Module 8.5 7BB Module 8.75 As can be seen from the figure, when the number of busbars is increased to 7, the speed of reducing the resistance loss of the module by continuing to increase the number of busbars tends to be gentle. The increased number of busbars will have an impact on the shading of the cell surface. 03 Advantages-Low resistance loss Number of busbars Resis tance loss  A paper by the Fraunhofer Institute at the 2016 European PV Conference entitled “Triangular ribbons for improved module efficiency“, which compares the pros and cons of triangular, flat and round ribbons in detail. 1 Light that is reflected off after being vertically incident on the solder 2 Light that is reflected off after being obliquely incident on the solder 3 Light that is reflected to cell surface after being obliquely incident on the solder edge 4 Light that is reflected to cell surface after being vertically incident on the solder 5 Light that is reflected to cell surface after being being obliquely incident on the solder 6 Light that is reflected onto the EVA surface and reflected back 03 Advantages In the article, the comparison of the light absorption of the 3BB, 5BB flat ribbon module, 15BB round ribbon module and 15BB triangular ribbon module shows that the triangular ribbon has a higher light absorption rate of 2.32 than the 5BB flat ribbon, 2.02 higher than round ribbon , and the overall light utilization is close to 100. 3BB 5BB 03 Advantages 15BB round ribbon 15BB triangular ribbon 04 Products 7BB Full-cell Tabber and Stringer Equipment model ZRFC-7BB-2000 Equipment size 5.8m*2.3m*2.1m Capacity 2000pcs/h Location accuracy 20μ m Fragment rate ＜ 0.15 Power 50KW 04 Products 7BB Half-cell Tabber and Stringer Equipment model ZRHC-7BB-3000 Equipment size 4.5m*2.3m*2.1m Capacity 3000-4000pcs/h Location accuracy 2μ m Fragment rate ＜ 0.15 Power 30KW 04 Products Triangular ribbon Before tin plating After tin plating After welding 04 Products Round ribbon module Triangular ribbon module The triangular ribbon reflect all of the light onto the surface of the cell， as shown in the figure to the right, 2 pieces of module are made of the same width of triangular ribbon and round ribbon, respectively, It can be seen that the triangular ribbon is more thinner and more invisible, which is why our technology names Stealth Metallization Enhancement Technology SEMI 05 Power increased Cell Type Number of busbars Module efficiency/ Power /W CTM / Isc /A Voc /V Imp /A Vmp /V FF / number of module Conventio nal multi-si 7BB triangular ribbon 17.29 334.41 102.61 9.38 45.55 8.90 37.58 78.30 49 5BB flat ribbon 16.73 323.56 99.28 9.26 45.70 8.73 37.08 76.46 61 Increases 0.56 10.85 3.33 0.12 0.17 1.84 Mono PERC 7BB triangular ribbon 18.98 367.20 101.33 9.93 47.69 9.39 39.11 77.53 37 5BB flat ribbon 18.43 356.60 96.53 9.70 47.94 9.20 38.85 76.86 61 Increases 0.55 10.60 0.23 0.19 0.67 Experiment results-2017.5  Conventional multi-si module 72pcs power increased of 10.85W  Mono PERC module 72pcs power increased of 10.60W 7BB mono PERC Half-cut module data 201806  The power of the half-cell triangular ribbon module is 17W higher than that of the full-cell flat ribbon module, and the full-cell triangular ribbon module is 9.68W higher than that of full-cell flat ribbon module. 60pcs Contrast data of flat ribbon and triangular ribbon 201805 Number of busbars Power/W Isc/A Voc/V Imp/A Vmp/V FF/ 7BB flat ribbon-0.6mm 306.79 9.93 39.55 9.44 32.51 78.09 7BB triangular ribbon 314.85 10.04 39.62 9.58 32.88 79.14 Increases 8.06 0.11 0.14 1.05  Using the same efficiency 7BB cell, the power of the triangular ribbon module is 8W higher than that of the flat ribbon. Ribbon Cell efficiency PmW IscA VocV F.F. IpmA VpmV RsmΩ RshΩ Half-cell triangular ribbon 21.80 328.09 10.20 39.57 81.28 9.74 33.70 217 644 Full-cell triangular ribbon 21.90 320.81 10.08 39.65 80.25 9.66 33.21 257 384 full-cell flat ribbon- 0.6mm 21.90 311.13 10.00 39.56 78.62 9.57 32.51 312 507 Increases of triangular ribbon 9.69 0.08 1.63 Increases of half- cell triangular ribbon 16.97 0.2 2.66 05 Power increased 06 Reliability test  The reliability test of the triangular ribbon with mono PERC module has all passed the TUV certification. CONTENTS Cost Analysis  02 Cost accounting  01 Power gains 03 01 Power gains Increased profit after using full-cell stringer Original power/W Original price/RMB Original total price/RMB Enhanced power/W Enhanced price/RMB Enhanced total price/RMB Revenue per module/RMB Annual income/104 Yuan Comprehensive annual income/104 Yuan 300 2.0 600 310 2.1 651 51 1321 1334 305 2.05 625.25 315 2.15 677.25 52 1348 Increased profit after using half-cell stringer Original power/W Original price/RMB Original total price/RMB Enhanced power/W Enhanced price/RMB Enhanced total price/RMB Revenue per module/RMB Annual income/104 Yuan Comprehensive annual income/104 Yuan 300 2.0 600 315 2.15 677.25 77.25 1501 1516 305 2.05 625.25 320 2.20 704 78.75 1531 NoteThe above data is calculated according to the following table Equipments Capacity pcs/h Power increased /W production capacity 10,000 pieces/a Uptime Full-cell triangular ribbon stringer 2000 10 25.92 90 Half-cell triangular ribbon stringer 3000 15 19.44 The comprehensive annual income is calculated as the ratio of output of half of 300W and 305W. 02 Cost accounting Note silver paste 5 yuan / gram, module 2 yuan / W, the premium is 0.05 yuan / W Item 5BB 7BB full-cell Revenue （ Do not consider premium） Revenue （ Consider premium） 7BB half-cell Revenue （ Do not consider premium） Revenue Consider premium） Power W 305 315 20 51.5 320 30 78 Ag-paste consumption（ mg/pcs） 100 85 4.5 4.5 85 4.5 4.5 Ribbon consumption（ kg） 0.23 0.1（ triangle） 0.25（ flat） -16.3 -16.3 0.1（ triangle） 0.22（ flat） -14.35 -14.35 unit price （ Yuan/kg） 65 150（ triangle）， 65（ flat 150（ triangle）， 65（ flat EVA g 430 430rear530（ front） -1.7 -1.7 430rear530（ front） -1.7 -1.7 unit price （ Yuan/m2） 7.5 7.5（ rear）， 8.5（ front） 7.5（ rear）， 8.5（ front） Revenue Yuan/1 module / / 6.5 38 / 18.45 66.45 Yuan/W / / 0.021 0.12 / 0.060 0.22 Item 5BB 7BB full-cell Revenue （ Do not consider premium） Revenue （ Consider premium） 7BB half-cell Revenue （ Do not consider premium） RevenueConsid er premium） Power W 310 315 10 25.75 320 20 52 Ag-paste consumption（ mg/pcs） 70 85 -4.5 -4.5 85 -4.5 -4.5 Ribbon consumption（ kg） 0.28 0.1（ triangle） 0.25（ flat） -3.25 -3.25 0.1（ triangle） 0.22（ flat） -1.3 -1.3 unit price（ Yuan/kg） 100 150（ triangle）， 65（ flat 150（ triangle）， 65（ flat EVA g 530 430rear530（ front） 1.7 -1.7 430rear530（ front） 1.7 1.7 unit price（ Yuan/m2） 8.5 7.5（ rear）， 8.5（ front） 7.5（ rear）， 8.5（ front） Revenue Yuan/1 module / / 3.95 38 / 15.9 47.9 Yuan/W / / 0.012 0.12 / 0.051 0.155 Company Culture CONTENTS 04 Company culture Innovation Responsibility Integrity Win-Win Contact Us CONTENTS 05 Contact us 杭州瞩日能源科技有限公司 地址浙江省杭州市萧山经济技术开发区红垦路 83号 Telephone 188 1489 1936 Fax 0571-8371-6569 Email saleshzjet.com Website www.hzjet.com.cn Thank you