Method for encapsulating crystalline silicon solar cell component

[0026] Example 1. A encapsulation method for crystalline silicon solar cell components is to laminate tempered glass 1, A-type EVA film 2, crystalline silicon solar cell 3, B-type EVA film 4, and PET backplane 5, then heat and vacuumize For pressure packaging, a type A EVA film with high light transmittance is used on one side facing the sun, and a type B EVA film that absorbs and blocks ultraviolet rays is used on the other side. The A type EVA film is based on parts by weight. It is composed of 95% EVA resin and 5% modified additive a; the EVA resin is a high light transmittance EVA resin PV1200 with a VA content of 33%. The formula of modified additive a is: in parts by weight, composed of 1.5 parts of organic peroxide crosslinking agent, 2 parts of crosslinking auxiliary agent, 0.8 parts of silane coupling agent, 0.3 part of light stabilizer and 0.2 part of antioxidant composition.

[0027] The B-type EVA film is composed of 95% EVA resin and 5% modified additive b by weight; the EVA resin is an EVA resin with a VA content of 25-33%. The formula of modified additive b is: in parts by weight, composed of 1.5 parts of organic peroxide crosslinking agent, 2 parts of crosslinking auxiliary agent, 0.8 parts of silane coupling agent, 0.2 part of light stabilizer, 0.3 part of antioxidant , 0.2 UV absorber and 0.2 UV blocking agent. The ultraviolet absorber is UV-326, UV-327, UV-328, UV-329, UV-531, UV-9, UV-P, U-888, UV-3638F UV absorbers. The ultraviolet blocking agent is titanium dioxide or zinc oxide.

[0028] The organic peroxide crosslinking agent in the modified additives a and b can be: 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (bis-two-five, 101), 2 , 5-Dimethyl-2,5-di-tert-butylperoxy-3-hexyne, dicumyl peroxide (DCP), tert-amyl peroxide-2-ethylhexanoate, peroxide- Tert-Butyl 2-ethylhexanoate, tert-amyl peroxide-2-ethylhexyl carbonate (TAEC), tert-butyl peroxide-2-ethylhexyl carbonate (TBEC), tert-butyl peroxybenzoate ( TBPB), 3,5,5-trimethylhexanoate tert-butyl peroxide (TBPIN), 1,1-bis(tert-butylperoxy) cyclohexane, 1,1-bis(tert-butylperoxy) ) -3,3,5-Trimethylcyclohexane (231), tert-butyl peroxide maleate, benzoyl peroxide. ; Cross-linking aids can be TAIC, TAC, TMPTMA and other products; silane coupling agents can be KH-550 (corresponding to foreign brands A-1100, Z-6011, KBM-903), KH-560 (corresponding Foreign brands are A-187, KBM-403), KH-570 (corresponding to foreign brands are A-174, KBM-503, Z-6030), KH-792 (corresponding to foreign brands are A-1120, Z-6020, KBM -603), KH-791, A-151, A-171, A-2120 (KBM-602), A-174, Z-6032, Z-6040, Z-6300, Z-6518, Z-6172, etc.; Light stabilizer, can be TINUVIN 622, 770, 944, 783, 123, 765, UV-2908, etc.; antioxidant can be 168, DLTP, DSTP, TNPP, TNP, 1010, 1076, 1098, B225, B215, B900 Wait.

[0029] Example 2. A encapsulation method for crystalline silicon solar cell components is to laminate tempered glass 1, A-type EVA film 2, crystalline silicon solar cell 3, B-type EVA film 4, and PET backplane 5, then heat and vacuumize For pressure packaging, a type A EVA film with high light transmittance is used on one side facing the sun, and a type B EVA film that absorbs and blocks ultraviolet rays is used on the other side. The A type EVA film is based on parts by weight. It is composed of 95% EVA resin and 5% modified additive a; the EVA resin is a high light transmittance EVA resin EV150 with a VA content of 33%. The formula of modified additive a is: in parts by weight, 1.49 parts of organic peroxide crosslinking agent, 1.99 parts of crosslinking assistant, 0.99 parts of silane coupling agent, 0.28 parts of light stabilizer and 0.25 parts of antioxidant composition.

[0030] The B-type EVA film is composed of 95% EVA resin and 5% modified additive b by weight; the EVA resin is an EVA resin with a VA content of 25-33%. The formula of modified additive b is: in parts by weight, it consists of 1.2 parts of organic peroxide crosslinking agent, 1.8 parts of crosslinking auxiliary agent, 0.9 parts of silane coupling agent, 0.2 part of light stabilizer, and 0.3 part of antioxidant , 0.3 UV absorber and 0.3 UV blocking agent.

[0031] The ultraviolet absorber is UV-326, UV-327, UV-328, UV-329, UV-531, UV-9, UV-P, U-888, UV-3638F UV absorbers. The ultraviolet blocking agent is titanium dioxide or zinc oxide.

[0032] The organic peroxide crosslinking agent in the modified additives a and b can be: 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (bis-two-five, 101), 2 , 5-Dimethyl-2,5-di-tert-butylperoxy-3-hexyne, dicumyl peroxide (DCP), tert-amyl peroxide-2-ethylhexanoate, peroxide- Tert-Butyl 2-ethylhexanoate, tert-amyl peroxide-2-ethylhexyl carbonate (TAEC), tert-butyl peroxide-2-ethylhexyl carbonate (TBEC), tert-butyl peroxybenzoate ( TBPB), 3,5,5-trimethylhexanoate tert-butyl peroxide (TBPIN), 1,1-bis(tert-butylperoxy) cyclohexane, 1,1-bis(tert-butylperoxy) )-3,3,5-Trimethylcyclohexane (231), tert-butyl peroxymaleate, benzoyl peroxide; cross-linking aid, can be TAIC, TAC, TMPTMA and other products; silanes The coupling agent can be KH-550 (corresponding to foreign brands A-1100, Z-6011, KBM-903), KH-560 (corresponding to foreign brands A-187, KBM-403), KH-570 (corresponding to foreign brands Brands are A-174, KBM-503, Z-6030), KH-792 (corresponding to foreign brands A-1120, Z-6020, KBM-603), KH-791, A-151, A-171, A- 2120 (KBM-602), A-174, Z-6032, Z-6040, Z-6300, Z-6518, Z-6172, etc.; light stabilizer, can be TINUVIN 622, 770, 944, 783, 123, 765 , UV-2908, etc.; antioxidants can be 168, DLTP, DSTP, TNPP, TNP, 1010, 1076, 1098, B225, B215, B900, etc.

[0033] During production, the EVA resin and various modified additives are fully mixed evenly by the mixing equipment, then added to the screw extruder hopper, and heated and extruded into a film-like product.

[0034] Example 3. A encapsulation method for crystalline silicon solar cell components is to laminate tempered glass 1, A-type EVA film 2, crystalline silicon solar cell 3, B-type EVA film 4, and PET backplane 5, then heat and vacuumize For pressure packaging, a type A EVA film with high light transmittance is used on one side facing the sun, and a type B EVA film that absorbs and blocks ultraviolet rays is used on the other side. The A type EVA film is based on parts by weight. It is composed of 95% EVA resin and 5% modified additive a; the EVA resin is a high light transmittance EVA resin MA-10 with a VA content of 33%. The formula of modified additive a is: in parts by weight, consisting of 1 part of organic peroxide crosslinking agent, 1 part of crosslinking aid, 1 part of silane coupling agent, 1 part of light stabilizer and 1 part of antioxidant composition.

[0035] The B-type EVA film is composed of 95% EVA resin and 5% modified additive b by weight; the EVA resin is an EVA resin with a VA content of 25-33%. The formula of modified additive b is: in parts by weight, consisting of 1 part of organic peroxide crosslinking agent, 0.8 part of crosslinking aid, 0.8 part of silane coupling agent, 0.5 part of light stabilizer, and 0.6 part of antioxidant , 0.5 UV absorber and 0.5 UV blocking agent.

[0036] The ultraviolet absorber is UV-326, UV-327, UV-328, UV-329, UV-531, UV-9, UV-P, U-888, UV-3638F UV absorbers. The ultraviolet blocking agent is titanium dioxide or zinc oxide.

[0037] The organic peroxide crosslinking agent in the modified additives a and b can be: 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (bis-two-five, 101), 2 , 5-Dimethyl-2,5-di-tert-butylperoxy-3-hexyne, dicumyl peroxide (DCP), tert-amyl peroxide-2-ethylhexanoate, peroxide- Tert-Butyl 2-ethylhexanoate, tert-amyl peroxide-2-ethylhexyl carbonate (TAEC), tert-butyl peroxide-2-ethylhexyl carbonate (TBEC), tert-butyl peroxybenzoate ( TBPB), 3,5,5-trimethylhexanoate tert-butyl peroxide (TBPIN), 1,1-bis(tert-butylperoxy) cyclohexane, 1,1-bis(tert-butylperoxy) )-3,3,5-Trimethylcyclohexane (231), tert-butyl peroxymaleate, benzoyl peroxide; cross-linking aid, can be TAIC, TAC, TMPTMA and other products; silanes The coupling agent can be KH-550 (corresponding to foreign brands A-1100, Z-6011, KBM-903), KH-560 (corresponding to foreign brands A-187, KBM-403), KH-570 (corresponding to foreign brands Brands are A-174, KBM-503, Z-6030), KH-792 (corresponding to foreign brands A-1120, Z-6020, KBM-603), KH-791, A-151, A-171, A- 2120 (KBM-602), A-174, Z-6032, Z-6040, Z-6300, Z-6518, Z-6172, etc.; light stabilizer, can be TINUVIN 622, 770, 944, 783, 123, 765 , UV-2908, etc.; antioxidants can be 168, DLTP, DSTP, TNPP, TNP, 1010, 1076, 1098, B225, B215, B900, etc.

[0038] During production, the EVA resin and various modified additives are fully mixed evenly by the mixing equipment, then added to the screw extruder hopper, and heated and extruded into a film-like product.