Halfcut MBB Module Manufacturing Technology Difficulties and Solutions-XN

Half-Chip MBB Module Manufacture Challenges while by half-chip technology we can use thinner weld strip and hence the use of strip and EVA will also decrease. Inherit the advantages of MBB Circular weld strip used for MBB can reduce shaded area and effectively reflect light on battery surface, to increase module short-circuit current. Optical utilization rate of weld strip area can increase from below 5 up to above 40. Increase power efficiency Reduce shade loss Better compatibilitySub-fissure resistance Regular modulepower loss 89.76Half-chip modulepower loss 43.27 Half-chip MBB module technical advantagesw w w . n x x n s o l a r . c o mSmaller disc for less use of silverLess grid wires for less silver consumption Less use of weld stripLess use of EVAIncrease power efficiency Reduce shade loss Better compatibilitySub-fissure resistance Increased number of main grid wires can shorten the fine grid between mains and effectively reduce the fine grid resistance, making the broadth narrower and naturally less silver consumption. Narrower fine grid broadth Half-chip MBB module technical advantagesw w w . n x x n s o l a r . c o mSmaller disc for less use of silverLess grid wires for less silver consumption Less use of weld stripLess use of EVAIncrease power efficiency Reduce shade loss Better compatibility Current load of half-chip module is only 1/2 that of integral chip, lower current load results in less use of grid wires, also less ld strtps, hence less silver consumption. Reduce 1 2 BB to 1 0 BB even down to 8 BBSub-fissure resistance Half-chip MBB module technical advantagesw w w . n x x n s o l a r . c o mSmaller disc for less use of silverLess grid wires for less silver consumption Less use of weld stripLess use of EVAIncrease power efficiency Reduce shade lossBetter compatibility Reduced number of grid wires will cause simultaneous reduction of weld strips and, owing to lower load carried by half-chip, the strip sectional area can be made smaller to further reduce the use of strip. Reduced number of grid wires Reduced weld strip sectional areaSub-fissure resistance Half-chip MBB module technical advantagesw w w . n x x n s o l a r . c o mSmaller disc for less use of silverLess grid wires for less silver consumption Less use of weld stripLess use of EVAIncrease power efficiency Reduce shade loss Better compatibility Half-chip MBB can use thinner weld strip, also reduce the thickness of EVA. Sub-fissure resistance Half-chip MBB module technical advantagesw w w . n x x n s o l a r . c o mSmaller disc for less use of silverLess grid wires for less silver consumption Less use of weld stripLess use of EVAIncrease power efficiency Reduce shade loss Better compatibility MBB/half-chip technology is fully compatibe with main-stream processes of polycrystal, monocrystal, PERC, black silicon, HJT, half-chip, dual-face, mono-glass, dual-galss etc. Sub-fissure resistance Half-chip MBB module technical advantagesw w w . n x x n s o l a r . c o mSmaller disc for less use of silverLess grid wires for less silver consumption Less use of weld stripLess use of EVAIncrease power efficiency Reduce shade loss Better compatibilitySub-fissure resistance For commonly seen subfissure and broken grid problems, affected area on MBB chip is smaller than that on 5BB battery, or in other words, MBB is of higher tolerance on battery chip subfissure, broken grid and cracks etc, causing less damage during module continuous running.In addition, welded strips are of more even distribution on the chip, or more evenly acting on chip, dispersing the chip packaging stress, and thereby improving mechanical strength of the chip and hence the module reliability. Half-chip MBB module technical advantagesw w w . n x x n s o l a r . c o m Note assuming module sale price of CNY2/W , silver slurry price CNY6/g, calculate on 60pcs battery module basis. Conclusions MBB integral chip benefit is calculated CNY6.50/piece of module, or CNY0.023/W; MBB half-chip benefit is calculated CNY40.10/piece of module, or CNY0.14/W; 。Half-chip/MBB technology can be combined with othersto break the ceiling of 300W power rate and obtain higher benefit return. Remark calculation data are provided here for reference only. Structural analysis Benefit comes mainly from battery chip cost-down silver slurry and power rate increase. Cost increases are owing mainly to addional use of weld strip and EVA needed by changed process, which dilute the monetary benefit.Operation incomes like sales at negotiated price for poor at lowered price or super quality module at elevated price are not inluded in the analysis. Item 4BB/5BB 12BB integral Monetary benefitCNY 9BB half-chip Monetary benefitCNYPower W 275 280 10.00 285 20.00Silver Use mg/piece 110 70 14.40 55 19.80Weld strip Use kg 0.23 0.28 -9.60 0.162 2.20Price CNY/kg 80 100 100EVA Weight g/m2 420 500 -5.10 450 -1.90 Price CNY/m2 8.4 10 9Benefit sum CNY/piece / / 6.50 / 40.10 CNY/W / / 0.023 0.14 Half-chip MBB module manufacturechalleges solutionsChapter Two Half-down capacity for half-chip productionChallenge 1 XN Automation CHn40 chip-cutting/welding integrated package solution Half-chip production involves more complicate process, needing first a chip cutting step before welding.。Half-chip MBB module manufacture challeges solutionsw w w . n x x n s o l a r . c o m Half-chip MBB module manufacture challeges solutionsw w w . n x x n s o l a r . c o mRosin weld/insufficient tensile strength Challenge 2 XN Automation CHn40 chip-cutting/welding integrated package solution 1. Less grid wires and thinner auxiliary wire help reducing silver use but cause higher welding dufficulty2. Need better match with battery end to design more perfect circuit pattern1. Uneven scaling powder coating 2. Screen priting ptern change 3. Effect of silver slurry brand 4. Uneven tin coating on weld wire Half-chip MBB module manufacture challeges solutionsw w w . n x x n s o l a r . c o mRosin weld/insufficient tensile strength Challenge 2 XN Automation CHn40 chip-cutting/welding integrated package solution 1. Uneven scaling powder coating 2. Screen priting ptern change 3. Effect of silver slurry brand 4. Uneven tin coating on weld wire Half-chip MBB module manufacture challeges solutionsw w w . n x x n s o l a r . c o mRosin weld/insufficient tensile strength Challenge 2 XN Automation CHn40 chip-cutting/welding integrated package solution Numerous silver slurry brands are available on the market, consideration on the price shall be combined with its latter effect on welding quality, so that the best choice of silver slurry shall be taken on test trial basis. 1. Uneven scaling powder coating 2. Screen priting ptern change 3. Effect of silver slurry brand 4. Uneven tin coating on weld wire Half-chip MBB module manufacture challeges solutionsw w w . n x x n s o l a r . c o mRosin weld/insufficient tensile strength Challenge 2 XN Automation CHn40 chip-cutting/welding integrated package solution Market available circular weld strip sometimes has uneven outer tin coating, impairing the concentric structure of tin coating and copper core and negatively affecting on welding quality. 1. Uneven scaling powder coating 2. Screen priting ptern change 3. Effect of silver slurry brand 4. Uneven tin coating on weld wire Copper coreTin coatingWeld strip sectional schematic Insufficient tin thicknessWelding schematic diagram Battery chip Weld strip shifting caused partial weldingChallenge 3 XN Automation CHn40 chip-cutting/welding integrated package solution MBB module uses circular weld strip having smaller contact area with weld disc and difficult to fix the position. Half-chip MBB uses thinner strip and cause more difficult positioning. Fragment/subfissureChallenge 4 XN Automation CHn40 chip-cutting/welding integrated package solution Fragment and subissure etc inevitably take places during automatic welding process to impact on module quality. XN Automation products solutions1. XN Automation erprise spirit company history2. XN Automation welding solutionChapter Three ● Enterprise spirit G ood faith, pragmatic, innovation mutual win● Quality policy Super quality high efficiency, customer satisfaction, sustained improvement, leading position in the industry● XN automation is a hi-tech enterprise focusing on R D and supply of high speed serial welder, high auracy typesetter and automatic stack welder etc, also providing packaged automatic control solutions. ● Built factories in Ningxia and Wuxi, Jiangsu -- Ningxiaa XN and Wuxi Zhenggang. The company has also established complete distribution network, selling products to more than 20 countries all over the world. ● A leading module automatic welding solution provider in China. 宁夏 无锡 XN Automation erprise spirit company historyw w w . n x x n s o l a r . c o m XN Automation erprise spirit company historyw w w . n x x n s o l a r . c o m ◆ Set up in 1999, originally registered in the name of Ningxi XN Image Equipment Manufacturing Co. Ltd. ◆ 1999-2008 R D, production and distribution of imagequipment◆ 2008 Stepped in solar energy PV industry, starting to develop solar battery chip serial welder machine◆ 2011 Launched 2nd generation CH2316B serial welder 600pcs/h, capable of 2BB/3BB chip welding ◆ 2012 Renamed as Ningxia XN Automation Equipment Co. Ltd., launched CH56 model MBB serial welder and sold to a lot of famous company in the industry ◆ 2013 Succeeded in R D of high speed CH513 serial welder and launched into the market ◆ 2014 Organized Wuxi Zhenggang Automation Equipment Co. Ltd. ◆ 2015 Launched CH526 ultrahigh speed serial welder and CH518 high speed serial welder onto market at the tear end◆2016 Launched DH120 bus-bar welder at the year end. ◆ 2017 Succeeded in R D of CHn20 MBB serial welder 12BB ◆ 2018 Launched CH n40 high speed MBB serial welder with half-chip cutting function 7-12BB, half-chip 3600pcs/h, integral chip 2600pcs/h, DH 150A bus-bar welder capable of welding half-chip with middle lead, and DH 150B bus-bar welder, the upgraded version of DH120 bus-bar welder. 公司历程Company history XN Automation front-end welding system solutionw w w . n x x n s o l a r . c o m 300MW MBB half-chip front-end intelligent welding system calculation on half-chip MBB capacity basis 6 sets6 sets 1 package CHn40 model chip cutting/serial welding integrated packagew w w . n x x n s o l a r . c o m XN half-chip MBB manufacture solution CHn40High capacity, high precision, chip cutting/welding integrated, self-moving, “Designed for Half-Chip”● 4000pcs/h chip cutting, 3200pcs/h half-chip serial welding, 2600pcs/h integral chip serial welding capacity● Compatible with 4BB to12BB half and/or intgral chip welding number of grid wires can be customerized on request ● Capable of welding 156.75*156.75mm, 161.7*161.75mm, 165*165mm, 170*170mm integral or half-cut battery chips. CHn40 model chip cutting/serial welding integrated packagew w w . n x x n s o l a r . c o m 12BB half-chip welding effect presentation CHn40 model chip cutting/serial welding integrated packagew w w . n x x n s o l a r . c o m 12BB integral chip welding effect presentation CHn40 model chip cutting/serial welding integrated packagew w w . n x x n s o l a r . c o mCHn40 model chip cutting/serial welding integrated package presentation Serial checkingDual box feeding Scaling powder coating Scaling powder applicationSNEC2018 field trial welding DH150-A busbar welder machinew w w . n x x n s o l a r . c o m ● All the materials are operated and/or installed on the same side, along with bus-bars and EPE insulation film, using a spool device to feed, draw, cut and place the materials automatically onto proper position. ● Short switch between typesettings ● Better compatibility to accept regular and MBB half/integral chips and dual-wave types etc. ● Higher automation level