Composite pane with electrical contact-making means

• US 10,348,011 B2
• Filed: 06/28/2013
• Issued: 07/09/2019
• Est. Priority Date: 08/01/2012
• Status: Active Grant

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Reul, Bernhard, Schall, Guenther
• Primary Examiner(s): Abraham, Ibrahime A
• Assistant Examiner(s): Bae, Gyounghyun
• Application Number:
  US14/416,056
• Publication Number:
  US 20150244089A1
• Time in Patent Office: 2,202 Days
• Field of Search: None
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10183 being not continuous, e.g. in edge regions
• CPC Class Codes: B32B 17/10229 Metallic layers sandwiched by dielectric layers
• CPC Class Codes: B32B 17/10495 optoelectronic, i.e. optical valve
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 37/02 characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
• CPC Class Codes: H01R 12/70 Coupling devices
• CPC Class Codes: H01R 4/00 Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
• CPC Class Codes: H01R 43/00 Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors of trolley lines B60M1/28
• CPC Class Codes: H05B 2203/011 Heaters using laterally extending conductive material as connecting means
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 3/06 Heater elements structurally combined with coupling elements or holders
• CPC Class Codes: H05B 3/86 the heating conductors being embedded in the transparent or reflecting material H05B3/845 takes precedence
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A composite pane with electrical contact-making means is described, having: a first pane and a second pane, which panes are connected to one another over their surface by means of a thermoplastic intermediate layer, at least one electrically conductive coating at least on the inner surface of the first pane, at least one busbar on a region of the electrically conductive coating, and at least one electrically conductive contact strip on at least one region of the busbar, wherein the contact strip is connected to at least one electrical feed line, and at least one region of the contact strip is in direct contact with the busbar.

Claims

1. A composite pane with electrical contacting means, comprising:

a first pane and a second pane, which are bonded face-to-face to each other via a thermoplastic intermediate layer,

at least one electrically conductive coating located at least on the interior side surface of the first pane and used for active heating of the composite pane,

at least one busbar containing silver particles and glass frits, and exhibiting uniform current flow located on a region of the at least one electrically conductive coating, and

at least one electrically conductive contact strip located on at least one region of the at least one busbar, the at least one electrically conductive contact strip containing at least one metal and increasing the current carrying capacity of the at least one busbar,

wherein the at least one busbar is layered between the at least one electrically conductive contact strip and the at least one electrically conductive coating, and

wherein the at least one electrically conductive contact strip is connected to at least one electrical feed line, and at least one region of the at least one electrically conductive contact strip is in direct contact with the at least one busbar,

wherein

i) the at least one electrically conductive contact strip is fixed to the at least one busbar by an adhesive strip, wherein the adhesive strip protrudes beyond the at least one electrically conductive contact strip and is adhesively bonded to the first pane by means of a protruding portion, or

ii) a rigid pressure element is arranged between the contact strip and the second pane so that an additional pressure is exerted on the contact strip in the direction of the at least one busbar.

2. The composite pane according to claim 1, wherein there is no mechanical connection, no connection via a soldering compound, and no connection by an adhesive, between the at least one busbar and the region of the at least one electrically conductive contact strip.

3. The composite pane according to claim 1, wherein the at least one electrically conductive contact strip is implemented as a strip of an electrically conductive foil and has a thickness from 10 μ

m to 500 μ

m, and contains at least copper, tinned copper, silver, gold, aluminum, zinc, tungsten, and/or tin.

4. The composite pane according to claim 3, wherein the at least one electrically conductive contact strip has a thickness from 15 μ

m to 200 μ

m.

5. The composite pane according to claim 1, wherein the at least one electrically conductive contact strip has a length L_K from 10 mm to 100 mm, and a width B_K from 2 mm to 40 mm.

6. The composite pane according to claim 5, wherein the at least one electrically conductive contact strip has a length L_K from 20 mm to 60 mm and a width B_K from 5 mm to 30 mm.

7. The composite pane according to claim 1, wherein a length L_K of the at least one electrically conductive contact strip is 80% to 120% of a length L_S of the at least one busbar.

8. The composite pane according to claim 7, wherein the length L_K of the at least one electrically conductive contact strip is 90% to 110% of the length L_S of the at least one busbar.

9. The composite pane according claim 1, wherein the at least one electrically conductive contact strip is in direct full-surface contact with the at least one busbar.

10. The composite pane according claim 1, wherein the at least one electrically conductive contact strip has a greater width than the at least one busbar.

11. The composite pane according to claim 1, wherein the at least one electrically conductive contact strip is connected to the electrical feed line via an electrical connection element.

12. The composite pane according to claim 11, wherein the at least one electrical connection element and the at least one electrically conductive contact strip are implemented in one piece.

13. The composite pane according to claim 1, wherein the at least one electrically conductive contact strip is fixed on the at least one busbar by an adhesive strip.

14. The composite pane according to claim 1, wherein, between the at least one electrically conductive contact strip and the second pane, a pressure element is arranged, which contains at least one polymer, one metal, or one alloy, and has a thickness greater than or equal to 200 μ

m, the pressure element being in contact with the at least one electrically conductive contact strip.

15. The composite pane according to claim 1, wherein the at least one busbar is implemented as a fired screen printing paste, which contains silver particles, and has a thickness from 5 μ

m to 40 μ

m.

16. The composite pane according to claim 15, wherein the at least one busbar has a thickness from 8 μ

m to 20 μ

m.

17. The composite pane according to claim 15, wherein the at least one busbar has a width Bs from 2 mm to 30 mm.

18. The composite pane according to claim 15, wherein the at least one busbar has a width Bs from 4 mm to 20 mm.

19. The composite pane according to claim 1, wherein the electrical feed line is implemented as a foil conductor.

20. The composite pane according to claim 19, wherein the at least one electrical feed line is connected to the at least one electrically conductive contact strip by a soldering compound or an electrically conductive adhesive.

21. The composite pane according to claim 1, wherein, between the at least one electrically conductive contact strip and the second pane, a pressure element is arranged, having a low elasticity.

22. A method for producing a composite pane with electrical contacting means, comprising:

applying an electrically conductive coating on one surface of a first pane used for active heating of the composite pane,

applying at least one busbar containing silver particles and glass frits, and exhibiting uniform current flow on a region of the electrically conductive coating,

arranging a thermoplastic intermediate layer on the one surface of the first pane,

arranging a second pane on the thermoplastic intermediate layer, arranging at least one electrically conductive contact strip connected to an electrical feed line such that at least one region of the at least one electrically conductive contact strip is in direct contact with the at least one busbar thereby increasing the current carrying capacity of the at least one busbar,

arranging the at least one bus bar between the at least one electrically conductive contact strip and the electrically conductive coating, and

bonding the first pane and the second pane via the thermoplastic intermediate layer,

wherein

i) the at least one electrically conductive contact strip is fixed to the at least one busbar by an adhesive strip, wherein the adhesive strip protrudes beyond the at least one electrically conductive contact strip and is adhesively bonded to the first pane by means of a protruding portion, or

ii) a rigid pressure element is arranged between the contact strip and the second pane so that an additional pressure is exerted on the contact strip in the direction of the at least one busbar.

23. The method according to claim 22, wherein the at least one electrically conductive contact strip is arranged on the at least one busbar and the thermoplastic intermediate layer is then arranged on the one surface.

24. The method according to claim 22, wherein the at least one electrically conductive contact strip is applied on the thermoplastic intermediate layer and the thermoplastic intermediate layer with the at least one electrically conductive contact strip is then arranged on the one surface.

25. The method of claim 22, further comprising:

using the composite pane as a pane selected from the group consisting of;

a heatable pane, as a pane with antenna function, as a pane with switchable or variable optical properties, or as a photovoltaic module, or as a thin-film photovoltaic module,

wherein the electrically conductive coating is an electrically heatable coating of a heatable pane or an antenna of a pane with antenna function or a plate electrode of a photovoltaic module.

26. A composite pane with electrical contacting means, comprising:

a first pane and a second pane, which are bonded face-to-face to each other via a thermoplastic intermediate layer,

at least one electrically conductive coating located at least on the interior side surface of the first pane and used for active heating of the composite pane,

at least one busbar containing silver particles and glass frits, and exhibiting uniform current flow located on a region of the at least one electrically conductive coating, and

at least one electrically conductive contact strip located on at least one region of the at least one busbar, the at least one electrically conductive contact strip containing at least one metal and increasing the current carrying capacity of the at least one busbar,

wherein the at least one busbar is arranged between the at least one electrically conductive contact strip and the at least one electrically conductive coating,

wherein the at least one electrically conductive contact strip is connected to at least one electrical feed line, and at least one region of the at least one electrically conductive contact strip is in direct contact with the at least one busbar,

wherein there is no mechanical connection, no connection via a soldering compound, and no connection by an adhesive, between the at least one busbar and the region of the at least one electrically conductive contact strip, and

wherein

i) the at least one electrically conductive contact strip is fixed to the at least one busbar by an adhesive strip, wherein the adhesive strip protrudes beyond the at least one electrically conductive contact strip and is adhesively bonded to the first pane by means of a protruding portion, or

ii) a rigid pressure element is arranged between the contact strip and the second pane so that an additional pressure is exerted on the contact strip in the direction of the at least one busbar.