Multi-electrode double layer capacitor having hermetic electrolyte seal
First Claim
1. A long life double layer capacitor comprising:
- a case;
a first terminal;
an electrically insulating hermetic seal interposed between the first terminal and the case;
a first current collector foil electrically coupled to an interior portion of the first terminal;
a first electrode, wherein the first electrode comprises carbon, the first electrode being juxtaposed against one side of the first current collector foil;
a porous separator juxtaposed against another side of the first electrode;
a second electrode, wherein the second electrode comprises carbon, one side of the second electrode being juxtaposed against the porous separator, wherein the porous separator is interposed between the first electrode and the second electrode;
a second current collector foil, the second current collector foil being juxtaposed against another side of the second electrode;
a second terminal electrically coupled to the second current collector foil; and
an electrolyte solution saturating the first electrode and the second electrode, wherein the electrolyte solution is substantially contained by the case and the electrically insulating hermetic seal, and wherein influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal.
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Accused Products
Abstract
A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal. And an electrolyte solution saturates the first and second electrodes comprising carbon and is substantially contained by the case and the electrically insulating hermitic seal such that an influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal.
109 Citations
52 Claims
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1. A long life double layer capacitor comprising:
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a case;
a first terminal;
an electrically insulating hermetic seal interposed between the first terminal and the case;
a first current collector foil electrically coupled to an interior portion of the first terminal;
a first electrode, wherein the first electrode comprises carbon, the first electrode being juxtaposed against one side of the first current collector foil;
a porous separator juxtaposed against another side of the first electrode;
a second electrode, wherein the second electrode comprises carbon, one side of the second electrode being juxtaposed against the porous separator, wherein the porous separator is interposed between the first electrode and the second electrode;
a second current collector foil, the second current collector foil being juxtaposed against another side of the second electrode;
a second terminal electrically coupled to the second current collector foil; and
an electrolyte solution saturating the first electrode and the second electrode, wherein the electrolyte solution is substantially contained by the case and the electrically insulating hermetic seal, and wherein influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A long life double layer capacitor comprising:
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a hermetically sealed case;
a plurality of electrodes, each having a first side, wherein each of the plurality of electrodes comprises carbon;
a plurality of current collector foils each juxtaposed against a respective one of the plurality of electrodes against said first side;
a porous separator material positioned between respective ones of the plurality of electrodes; and
a non-aqueous electrolyte solution saturating said plurality of electrodes, wherein a multi-electrode, single cell device is formed, and wherein influx of impurities into the non-aqueous electrolyte solution is substantially inhibited by the hermetically sealed case. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of making a long life double layer capacitor comprising:
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juxtaposing a respective side of each of a plurality of electrodes with one of a plurality of current collector foils wherein each of the plurality of electrodes comprises carbon;
interposing a porous separator between respective other sides of each of the plurality of electrodes;
saturating the plurality of electrodes with an electrolyte solution;
sealing hermetically the plurality of electrodes and the plurality of current collector foils within a case to substantially inhibit an influx of impurities into the electrolyte solution. - View Dependent Claims (34, 35, 36, 37)
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38. A method of making a double layer capacitor comprising:
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coupling a first current collector foil to an internal portion of a first terminal;
folding a first electrode over the current collector foil wherein the first electrode comprises carbon;
placing a porous separator against the first electrode;
juxtaposing a second electrode against the porous separator wherein the second electrode comprises carbon;
coupling electrically the second electrode to a case;
saturating the first electrode and the second electrode with an electrolyte solution; and
sealing hermetically the case, wherein the electrolyte is substantially contained within the case, and wherein influx of impurities into the electrolyte solution is substantially impaired. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification