CN104157735A - 一种太阳能电池制绒工艺 - Google Patents
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Abstract
本发明涉及太阳能电池制绒领域，特别是涉及一种单晶硅制绒工艺。一种太阳能电池制绒工艺，在现有的太阳能电池制绒工艺前增加预清洗和喷淋水洗步骤。本发明在初始对脏污单晶片进行有效清洗，从源头上制止不合格片的产生，降低脏污不合格片比例，提高产品品质，降低生产成本；本发明预清洗过程中采用清洗槽中的清洗液对硅片更加彻底清洗，阻止了污垢对主要工艺槽（刻蚀槽）的影响，增加了工艺稳定性；本发明预清洗过程中在硅片表面形成新的制绒结构，提高了电池片光电转换效率。
Description
技术领域
本发明涉及太阳能电池制绒领域，特别是涉及一种单晶硅制绒工艺。
背景技术
目前太阳能电池所采用的单晶制绒工艺流程为：碱制绒—喷淋水洗—流动水洗—酸洗—喷淋水洗—流动水洗—热水洗—热风干。本工艺流程将未经过预清洗的单晶硅片通过机械手直接放入碱洗工艺槽，而碱洗工艺只针对硅片表面进行刻蚀和简单清洗，不能清洗手指印、油脂等大分子有机物，达不到清洗的目的。产生的不合格片较多，并影响电池片的转换效率。
发明内容
本发明所要解决的技术问题是：如何解决当前碱洗工艺只针对硅片表面进行刻蚀和简单清洗，不能清洗手指印、油脂等大分子有机物，达不到清洗的目的的问题。
本发明所采用的技术方案是：一种太阳能电池制绒工艺，其特征在于：在现有的太阳能电池制绒工艺前增加预清洗和喷淋水洗步骤。也就是按照预清洗—喷淋水洗—碱制绒—喷淋水洗—流动水洗—酸洗—喷淋水洗—流动水洗—热水洗—热风干的步骤进行，其中喷淋水洗与现有的喷淋水洗过程完全相同。
作为一种优选方式：预清洗在预清洗槽中进行，清洗槽中的清洗液初始按照体积比，去离子水：25%浓度双氧水：45%浓度氢氧化钾=200:25:2配置。
作为一种优选方式：硅片在清洗槽中清洗时，保持清洗槽中的清洗液温度为60摄氏度，清洗时间为6分钟。
作为一种优选方式：清洗槽中的清洗液需要补充，补液时每400片硅片补充0.6升25%浓度双氧水。
本发明的有益效果是：本发明在初始对脏污单晶片进行有效清洗，从源头上制止不合格片的产生，降低脏污不合格片比例，提高产品品质，降低生产成本；本发明预清洗过程中采用清洗槽中的清洗液对硅片更加彻底清洗，阻止了污垢对主要工艺槽（刻蚀槽）的影响，增加了工艺稳定性；本发明预清洗过程中在硅片表面形成新的制绒结构，提高了电池片光电转换效率。
具体实施方式
本发明是在现有太阳能单晶硅片制绒工艺流程上的改进，具体实施过程如下：
在现有清洗制绒步骤前添加一步双氧水预清洗工艺，使用槽式设备（与现有的碱制绒槽类似），预清洗槽槽体容量为279L（长宽高参数为100cm×62cm×45cm)。槽体下铺设去离子热水自动补给管、自动排水管、自动控制电动加热棒（恒温60度）、25%双氧水自动补给管、45%KOH溶液自动补给管。该槽体内管道液体供应量与供应时机均由设备内PLC控制系统控制，设定首次补液量与批次补液量，设定槽内液体清洗批次为20批，达到使用次数后自动更换液体。自动控制系统控制设备自动运行，遇突发状况切换手动模式进行人为操作。
在预清洗槽中初始加入200L去离子水（热水），25%浓度双氧水25L，45%浓度氢氧化钾2L，工艺温度保持在60摄氏底，清洗时间为6分钟，补液为每400片补充0.6L双氧水。
实验参考数据：（以1000片为单位进行多次对比试验）
为改进前：
改进后：
通过改造前后大量实验数据分析表明，本专利能够整体提高电池片合格率6%左右，提高电池产品光电转换效率0.1%左右。
Claims (4)
1.一种太阳能电池制绒工艺，其特征在于：在现有的太阳能电池制绒工艺前增加预清洗和喷淋水洗步骤。
2.根据权利要求1所述的一种太阳能电池制绒工艺，其特征在于：预清洗在预清洗槽中进行，清洗槽中的清洗液初始按照体积比，去离子水：25%浓度双氧水：45%浓度氢氧化钾=200:25:2配置。
3.根据权利要求2所述的一种太阳能电池制绒工艺，其特征在于：硅片在清洗槽中清洗时，保持清洗槽中的清洗液温度为60摄氏度，清洗时间为6分钟。
4.根据权利要求3所述的一种太阳能电池制绒工艺，其特征在于：清洗槽中的清洗液需要补充，补液时每400片硅片补充0.6升25%浓度双氧水。
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914259A (zh) * | 2016-05-31 | 2016-08-31 | 宁夏银星能源光伏发电设备制造有限公司 | 金刚线切割单晶硅片快速清洗制绒工艺 |
| CN107180894A (zh) * | 2017-05-19 | 2017-09-19 | 常州亿晶光电科技有限公司 | 改善perc高效电池片外观的洗磷工艺 |
| CN107968130A (zh) * | 2017-11-27 | 2018-04-27 | 乐山新天源太阳能科技有限公司 | 硅片清洗制绒工艺 |
| CN107968062A (zh) * | 2017-11-27 | 2018-04-27 | 乐山新天源太阳能科技有限公司 | 硅片清洗制绒装置 |
| CN109326660A (zh) * | 2018-09-16 | 2019-02-12 | 苏州润阳光伏科技有限公司 | 太阳电池单晶硅基绒面生成工艺 |
| CN110387584A (zh) * | 2019-08-15 | 2019-10-29 | 东方环晟光伏（江苏）有限公司 | 一种大尺寸叠瓦电池制绒装置及其控制方法 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914259A (zh) * | 2016-05-31 | 2016-08-31 | 宁夏银星能源光伏发电设备制造有限公司 | 金刚线切割单晶硅片快速清洗制绒工艺 |
| CN105914259B (zh) * | 2016-05-31 | 2017-12-15 | 宁夏银星能源光伏发电设备制造有限公司 | 金刚线切割单晶硅片快速清洗制绒工艺 |
| CN107180894A (zh) * | 2017-05-19 | 2017-09-19 | 常州亿晶光电科技有限公司 | 改善perc高效电池片外观的洗磷工艺 |
| CN107968130A (zh) * | 2017-11-27 | 2018-04-27 | 乐山新天源太阳能科技有限公司 | 硅片清洗制绒工艺 |
| CN107968062A (zh) * | 2017-11-27 | 2018-04-27 | 乐山新天源太阳能科技有限公司 | 硅片清洗制绒装置 |
| CN107968062B (zh) * | 2017-11-27 | 2019-09-13 | 乐山新天源太阳能科技有限公司 | 硅片清洗制绒装置 |
| CN109326660A (zh) * | 2018-09-16 | 2019-02-12 | 苏州润阳光伏科技有限公司 | 太阳电池单晶硅基绒面生成工艺 |
| CN110387584A (zh) * | 2019-08-15 | 2019-10-29 | 东方环晟光伏（江苏）有限公司 | 一种大尺寸叠瓦电池制绒装置及其控制方法 |
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Application publication date: 20141119 |