Solar panels with integrated cell-level MPPT devices

• US 9,800,053 B2
• Filed: 10/04/2011
• Issued: 10/24/2017
• Est. Priority Date: 10/08/2010
• Status: Active Grant

• Current Assignee: Tesla Inc.
• Original Assignee: Tesla Inc.
• Inventors: Beitel, Christopher James, Heng, Jiunn Benjamin, Fu, Jianming, Xu, Zheng
• Primary Examiner(s): Lin, James
• Assistant Examiner(s): HORTON, DUJUAN A
• Application Number:
  US13/252,987
• Publication Number:
  US 20120085384A1
• Time in Patent Office: 2,212 Days
• Field of Search: 136244
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H02J 2300/26 involving maximum power point tracking control for photovoltaic sources maximum power point systems in particular G05F1/67
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02S 40/32 comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

One embodiment of the present invention provides a solar cell panel that includes a front-side cover, a back-side cover, a number of solar cells situated between the front-side cover and the back-side cover, and a number of maximum power point tracking (MPPT) devices situated between the front-side cover and the back-side cover.

Claims

1. A solar cell panel, comprising:

a first cover on a first side of the solar panel;

a second cover on a second side of the solar panel;

a number of solar cells positioned between the first cover and the second cover, wherein a respective solar cell comprises a first electrode positioned on a first surface and a second electrode positioned on a second surface, and wherein the first and second surfaces are opposite to each other; and

a maximum power point tracking integrated circuit chip positioned between a first solar cell and a nearest adjacent solar cell, wherein the maximum power point tracking integrated circuit chip is placed adjacent to an edge of the first solar cell and an edge of the nearest adjacent solar cell,

wherein the maximum power point tracking integrated circuit chip includes a first input, a second input, and an output,

wherein the first input, second input, and the output of the maximum power point tracking integrated circuit chip are physically separated from one another,

wherein the first and second inputs are on opposite sides of the maximum power point tracking integrated circuit chip;

wherein the first input is in direct contact with and substantially aligned in the same plan as the first electrode of the first solar cell,

wherein the second input is in direct contact with and substantially aligned in the same plane as the second electrode of the first solar cell,

wherein the output is in direct contact with the first electrode of the nearest adjacent solar cell, and

wherein the maximum power point tracking integrated circuit chip provides a serial connection between the first solar cell and the nearest adjacent solar cell.

2. The solar panel of claim 1, wherein the maximum power point tracking integrated circuit chip is configured to control output power of a subset of solar cells.

3. The solar panel of claim 1, wherein the maximum power point tracking integrated circuit chip is configured to control output power of a single solar cell.

4. The solar panel of claim 1, wherein the maximum power point tracking integrated circuit chip is placed next to a corner of the first solar cell.

5. The solar panel of claim 1, wherein the maximum power point tracking integrated circuit chip is electrically coupled to the first solar cell and the nearest adjacent solar cell using one of the following methods:

solder bumps;

flip-chip bonding; and

contact wrap-through.

6. The solar panel of claim 1, wherein a respective solar cell'"'"'s busbar configuration is one of:

a double-busbar configuration;

a single center busbar configuration; and

a single edge busbar configuration.

7. A solar cell coupling system, comprising:

a first solar cell and a second solar cell, wherein each solar cell comprises a first electrode positioned on a first surface and a second electrode positioned on a second surface, and wherein the first and second surfaces are opposite to each other; and

a maximum power point tracking integrated circuit chip positioned between the first solar cell and the second solar cell, wherein the maximum power point tracking integrated circuit chip is placed adjacent to an edge of the first solar cell and an edge of the nearest adjacent solar cell,

wherein the maximum power point tracking integrated circuit chip includes a first input, a second input, and an output,

wherein the first input, second input, and the output of the maximum power point tracking integrated circuit chip are physically separated from one another,

wherein the first and second inputs are on opposite sides of the maximum power point tracking integrated circuit chip,

wherein the first input is in direct contact with and substantially aligned in the same plane as the first electrode of the first solar cell,

wherein the second input is in direct contact with and substantially aligned in the same plane as the second electrode of the first solar cell

wherein the output is in direct contact with a first electrode of the second solar cell, and

wherein the maximum power point tracking integrated circuit chip provides a serial connection between the first solar cell and the second solar cell.

8. The solar cell coupling system of claim 7, wherein the maximum power point tracking integrated circuit chip is configured to control output power of multiple solar cells.

9. The solar cell coupling system of claim 7, wherein the maximum power point tracking integrated circuit chip is dedicated to control output power of the first solar cell.

10. The solar cell coupling system of claim 7, wherein the maximum power point tracking integrated circuit chip is placed next to a corner of the first solar cell.

11. The solar cell coupling system of claim 7, wherein the maximum power point tracking integrated circuit chip is electrically coupled to the first solar cell and the second solar cell using one of the following methods:

solder bumps;

flip-chip bonding; and

contact wrap-through.

12. The solar cell coupling system of claim 7, wherein a busbar configuration of the first and the second solar cells is one of:

a double-busbar configuration;

a single center busbar configuration; and

a single edge busbar configuration.