Busbars for electrically powered cells
First Claim
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1. An edge busbar having a shape effective to be peripherally disposed about a substantial perimeter of an edge, between a first surface and an opposite second surface, of an electrical device, wherein said edge busbar comprises:
- at least one electrically conductive connector portion effective to form an electrically conductive path from said first surface, wrapping transversely around a portion of said edge, to said opposite second surface; and
an electrically conductive perimeter portion in electrical contact with said connector portion, wherein said perimeter portion is peripherally on said substantial perimeter.
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Abstract
Edge busbars on a substantial perimeter of an electrochromic device are disclosed having electrical paths wrapping over the perimeter edge. Internal busbars interior from the perimeter are disclosed which lower the conductivity of the conductive layer of an electrochromic device. Signals supplied to the busbars to control the electrochromic device are controlled by a switching power supply that allows the maintaining of the color of the electrochromic device without application of continuous power.
497 Citations
37 Claims
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1. An edge busbar having a shape effective to be peripherally disposed about a substantial perimeter of an edge, between a first surface and an opposite second surface, of an electrical device, wherein said edge busbar comprises:
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at least one electrically conductive connector portion effective to form an electrically conductive path from said first surface, wrapping transversely around a portion of said edge, to said opposite second surface; and
an electrically conductive perimeter portion in electrical contact with said connector portion, wherein said perimeter portion is peripherally on said substantial perimeter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An edge busbar pair comprising a first edge busbar and a second edge busbar, each edge busbar of said pair having a shape to be peripherally disposed about a respective substantial perimeter edge of a first substrate and a second substrate respectively of an electrical device, said edge busbar pair further including:
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said first busbar comprising a first connector portion and a first perimeter portion, said first connector portion effective to form an electrically conductive first path from a first front surface of said first substrate, wrapping around a portion of said edge of said first substrate, to an opposite first back surface of said first substrate, said first perimeter portion being in electrical contact with said first connector portion, and wherein said first perimeter portion is peripherally on said first substantial perimeter of said first substrate;
a second busbar comprising a second connector portion and a second perimeter portion, said second connector portion effective to form an electrically conductive second path from a second front surface of said second substrate, wrapping around a portion of an edge of said second substrate, to an opposite second back surface of said second substrate, said second perimeter portion being in electrical contact with said second connector portion, and wherein said second perimeter portion is peripherally on said second substantial perimeter of said second substrate; and
wherein said first front surface and said second front surface proximately face each other. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An electrochromic device comprising a first substrate;
- a second substrate; and
an edge busbar pair, wherein said edge busbar pair comprising a first edge busbar and a second edge busbar, each edge busbar of said pair peripherally disposed about a respective substantial perimeter edge of said first substrate and said second substrate respectively, said edge busbar pair further including;said first busbar comprising a first connector portion and a first perimeter portion, said first connector portion effective to form an electrically conductive first path from a first front surface of said first substrate, wrapping around a portion of said edge of said first substrate, to an opposite first back surface of said first substrate, said first perimeter portion being in electrical contact with said first connector portion, and wherein said first perimeter portion is peripherally on said first substantial perimeter of said first substrate;
a second busbar comprising a second connector portion and a second perimeter portion, said second connector portion effective to form an electrically conductive second path from a second front surface of said second substrate, wrapping around a portion of an edge of said second substrate, to an opposite second back surface of said second substrate, said second perimeter portion being in electrical contact with said second connector portion, and wherein said second perimeter portion is peripherally on said second substantial perimeter of said second substrate; and
wherein said first front surface and said second front surface face each other. - View Dependent Claims (17, 18)
- a second substrate; and
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19. An internal busbar for a substrate having a conductive layer and a reactive layer on a first surface, said internal busbar comprising:
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at least one conductive strip, isolated from chemical reaction with said reactive layer; and
at least one conductive connecting portion, each connecting portion electrically connecting a non-peripheral portion of said conductive layer to a segment of said conductive strip. - View Dependent Claims (20, 21, 22)
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23. An internal busbar for a substrate having a conductive layer on a surface of the substrate, said internal busbar comprising:
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at least one conductive strip having increased electrical conductance per unit length from the conductive layer in a longitudinal direction of said conductive strip, and said conductive strip having a perimeter in contact with the conductive layer. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
at least one sublayer conductive strip under the conductive layer, said sublayer conductive strip having increased electrical conductance per unit length from the conductive layer.
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27. An internal busbar according to claim 23, wherein said at least one conductive strip has a transverse axis at an angle to the axis perpendicular to the surface of the substrate.
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28. An internal busbar according to claim 27, wherein said transverse axis is parallel to a viewing direction of the substrate.
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29. An internal busbar according to claim 28, wherein the substrate is a part of a window, a windshield, a sunroof, a light filter, or a mirror.
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30. An internal busbar according to claim 23, wherein said at least one conductive strip is composed of a cured metallic frit, conductive ink, conductive epoxy, a metal rod, or a metal bar.
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31. A transparent conducting sheet comprising:
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a transparent substrate sheet;
a transparent electrically conducting layer on a substantial surface of said substrate sheet; and
at least one conductive strip interior to a perimeter edge of said conducting layer;
said at least one conductive strip effective to lower an effective conductivity of said conducting layer.- View Dependent Claims (32, 33)
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34. An electrical device comprising:
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a conductive layer;
an edge conductor on a perimeter portion of said conductive layer; and
at least one conductive strip having increased electrical conductance per unit length from said conductive layer, and said conductive strip having a perimeter in contact with said conductive layer. - View Dependent Claims (35, 36)
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37. A method to form an interior busbar comprising the steps of:
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forming at least one channel on a surface of a substrate interior to a perimeter of said substrate;
applying a conductive material to said at least one channel;
applying a conductive layer over said surface effective to completely cover said applied conductive material.
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Specification