Electrical energy storage device for solar cell

• US 8,138,713 B2
• Filed: 08/29/2008
• Issued: 03/20/2012
• Est. Priority Date: 08/26/2008
• Status: Expired due to Fees

• Current Assignee: Apogee Power Incorporated
• Original Assignee: Apogee Power Incorporated, National Energy Technology Company Limited
• Inventors: Tsai, Keh-Chi, Lin, Wen-Hua, James, Steve
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US12/201,762
• Publication Number:
  US 20100052602A1
• Time in Patent Office: 1,299 Days
• Field of Search: 320/101
• US Class Current: 320/101
• CPC Class Codes: H01M 10/465 with solar battery as charging system
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10S 323/906 Solar cell systems

Abstract

An electrical energy storage device for a solar cell includes at least one electrode substrate coated with a oxide or mixed oxides layer. When the electrical energy storage device is electrically connected with a receive unit of the solar unit in parallel, the electrical energy storage device can have the advantages of high electric energy density, enhancing the charging efficiency of the solar cell, and reducing the charging time of the solar cell.

Claims

1. A solar cell comprising:

a receive unit comprising a solar panel;

an electrical energy storage device electrically connected in parallel with the receive unit; and

a battery unit electrically connected in parallel with said electrical energy storage device;

wherein the electrical storage device comprises a pair of electrode substrates (20) spacedly connected to each other by an insulated annular frame (30);

a solid separator (40) disposed between the electrode substrates (20), preventing the electrode substrates (20) from touching one another;

electrolyte (50) surrounding the separator (40) and contained between the electrode substrates (20); and

oxide layers or mixed oxide layers (22) coated on the electrode substrates (20) in contact with the electrolyte (50), the oxide or mixed oxide layers (22) including at least one transition metal selected from the group consisting of platinum, palladium, ruthenium, iridium, rhodium and mixtures thereof.

2. The electrical energy storage device as claimed in claim 1, wherein said electrode substrate is made of titanium.

3. The electrical energy storage device as claimed in claim 2, wherein said electrode substrate is coated with said oxide or mixed oxides layer by a process for depositing a ceramic coating.

4. The electrical energy storage device as claimed in claim 3, wherein said oxide or mixed oxides layer includes tantalum or zirconium.

5. The electrical energy storage device as claimed in claim 1, wherein said electrode substrate is coated with said oxide or mixed oxides layer by a process for depositing a ceramic coating.

6. The electrical energy storage device as claimed in claim 1, wherein said oxide or mixed oxides layer includes tantalum or zirconium.