Frame interconnect for concentrated photovoltaic module
View Patent ↗In accordance with the present invention, there is provided multiple embodiments of a concentrated photovoltaic (CPV) receiver package or module which includes a uniquely configured frame interconnect to facilitate the electrical connection of a receiver die of the CPV module to the conductive pattern of an underlying substrate thereof. In each embodiment of the present invention, a single piece of sheet metal is bent to form features to fit over the bus bar on the receiver die and bond pads of the conductive pattern on the substrate. Electrical connections can be made by soldering or conductive paste attach. Elevated, flat areas between connections facilitates vacuum pick up and automatic assembly and provides high potential insulation between connects. Additionally, in each embodiment of the present invention, the piece of bent sheet metal used to form the frame interconnect of the CPV module includes a solderable surface finish, and defines a window to accommodate an optical prism or other light guide for concentrating solar rays.
1. A concentrated photovoltaic (CPV) module, comprising:
a substrate having a conductive pattern disposed thereon;
a receiver die having a top surface including a pair of bus bars disposed on the top surface thereof, and an opposed bottom surface mounted to and electrically connected to a prescribed portion of the conductive pattern; and
a frame interconnect comprising a single piece of material and including:
a main body portion disposed above the receiver die and including a window formed therein and in which a portion of the receiver die is exposed;
a pair of inner contact portions extending generally downward from the main body portion toward the receiver die and directly attached to respective ones of the bus bars of the receiver die; and
a pair of outer contact portions extending generally downward from the main body portion toward the substrate, wherein the pair of outer contact portions are directly attached to respective prescribed portions of the conductive pattern of the substrate.
2. The CPV module of claim 1 wherein the window is sized and configured to facilitate the alignment of a light concentrating device with the portion of the receiver die exposed in the window, and wherein the frame interconnect comprises sheet metal.
3. The CPV module of claim 2 wherein the window is partially defined by a plurality of chamfered corners of the frame interconnect, the chamfered corners being sized and configured to define point contacts with the light concentrating device upon the advancement thereof through the window.
4. The CPV module of claim 2 wherein the frame interconnect further includes an integral cable connector portion.
5. The CPV module of claim 2 wherein:
a bypass diode is mounted and electrically connected to a prescribed portion of the conductive pattern; and
the frame interconnect is further sized and configured to facilitate the electrical connection of at least one of the bus bars of the receiver die to the bypass diode.
6. The CPV module of claim 1 wherein the main body of the frame interconnect includes a plurality of inner sides which are arranged in opposed pairs and collectively define the window in a generally quadrangular configuration.
7. The CPV module of claim 6 wherein the window is partially defined by a plurality of chamfered corners which are defined by the main body portion and extend between respective adjacent pairs of the inner sides, the chamfered corners being sized and configured to define point contacts with the light concentrating device upon the advancement thereof through the window.
8. The CPV module of claim 6 wherein the inner contact portions extend along respective ones of an opposed pair of the inner sides of the main body portion of the frame interconnect.
9. The CPV module of claim 1 , wherein each of the inner contact portions comprise an inner flange portion directly attached to a respective bus bar of the receiver die; and wherein each of the outer contact portions comprise an outer flange portion directly attached to a respective prescribed portion of the conductive pattern of the substrate.
10. The CPV module of claim 9 wherein:
the main body portion has a generally planar configuration and extends along a first plane; and
each outer flange portion has a generally planar configuration and extends along a common second plane which is disposed in spaced, generally parallel relation to the first plane; and
each inner flange portion has a generally planar configuration and extends along a common third plane which is disposed between and in generally parallel relation to the first and second planes.
11. The CPV module of claim 10 wherein:
the inner contact portions each extend generally perpendicularly relative to the main body portion; and
the outer contact portions each extend at an outward angle relative to the main body portion.
12. The CPV module of claim 1 wherein the main body portion is generally planar, and the inner and outer contact portions are each generally planar and extend generally perpendicularly relative to the main body portion.
13. The CPV module of claim 12 wherein:
the receiver die has a prescribed thickness;
the inner contact portions are each of a first height; and
the outer contact portions are each of a second height which exceeds the first height by a distance substantially equal to the thickness of the receiver die.
14. The CPV module of claim 1 wherein the frame interconnect further includes a pair of tab portions integrally connected to the main body portion, the tab portions being sized and configured to increase the structural integrity of the frame interconnect.
15. The CPV module of claim 14 wherein:
a bypass diode is mounted and electrically connected to a prescribed portion of the conductive pattern; and
one of the tab portions includes a supplemental contact portion protruding therefrom which is sized and configured to facilitate the electrical connection of at least one of the bus bars of the receiver die to the bypass diode.
16. The CPV module of claim 1 wherein the frame interconnect further includes an cable connector portion which is integrally connected to and extends at least partially along one of the outer contact portions.
17. A concentrated photovoltaic (CPV) module, comprising:
a substrate having a conductive pattern;
a receiver die having a bottom surface mounted to the substrate, wherein the receiver die includes at least a pair of bus bars disposed on a top surface thereof; and
a frame interconnect that comprises a single piece of material and sized and configured to provide direct electrical connection of the receiver die to at least two prescribed portions of the substrate, wherein the frame interconnect includes:
a main body portion including a window formed therein and in which a portion of the receiver die is exposed, the window being sized and configured to facilitate the alignment of a light concentrating device with the portion of the receiver die exposed in the window;
a pair of inner contact portions extending generally downward from the main body portion and directly attached to respective ones of the bus bars disposed on the receiver die; and
a pair of outer contact portions extending generally downward from the main body portion and directly attached to respective prescribed portions of the conductive pattern of the substrate.