Quick recharge energy storage device, in the form of thin films

• US 20040161640A1
• Filed: 07/09/2003
• Published: 08/19/2004
• Est. Priority Date: 10/22/2001
• Status: Abandoned Application

• Current Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Original Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Inventors: Salot, Raphael
• Application Number:
  US10/250,769
• Publication Number:
  US 20040161640A1
• Time in Patent Office: Days
• US Class Current: 429/9
• CPC Class Codes: H01G 11/08 Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component
• CPC Class Codes: H01G 11/10 Multiple hybrid or EDL capacitors, e.g. arrays or modules housings, cases, encapsulations or mountings thereof H01G11/78
• CPC Class Codes: H01G 11/26 characterised by their structure, e.g. multi-layered, porosity or surface features
• CPC Class Codes: H01G 11/72 specially adapted for integration in multiple or stacked hybrid or EDL capacitors
• CPC Class Codes: H01G 11/82 Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
• CPC Class Codes: H01G 4/40 Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The quick recharge energy storage device has a sufficient capacity due to the combination of a micro-battery and at least one micro-supercapacitor connected between two terminals of an integrated circuit. The integrated circuit, powered by the micro-battery, monitors high-speed (less than one second) charge of the micro-supercapacitors from an external energy source. The micro-supercapacitor can be connected in parallel with the micro-battery so as to subsequently recharge the micro-battery during the necessary time. The micro-battery provides a sufficient energy capacity, while the micro-supercapacitors allow high recharging speeds compatible with various applications (smart cards, smart labels, micro-system power supply, etc . . . ). The micro-battery and micro-supercapacitors are preferably formed on the same substrate, either side by side or stacked. Series connection of several micro-supercapacitors provides sufficient voltage for charging the micro-battery.

Claims

1. An energy storage device comprising a battery and at least one supercapacitor, device characterized in that the battery and supercapacitor are respectively formed by a micro-battery (1) and a micro-supercapacitor (7) achieved in the form of thin films, the micro-supercapacitor (7) being connected between two terminals of a charging monitoring circuit (13) comprising means (S) for monitoring closing of at least one normally open electronic switch (15), so as to connect the micro-supercapacitor (7) and the micro-battery (1) in parallel to recharge the micro-battery from the micro-supercapacitor (7).

2. Device according to claim 1, characterized in that the charging monitoring circuit (13) is supplied by the micro-battery (1).

3. Device according to one of claims 1 and 2, characterized in that it comprises a plurality of micro-supercapacitors (7a, 7b, 7c) connected in series between the terminals of the charging monitoring circuit (13), the series circuit formed by the micro-supercapacitors (7a, 7b, 7c) being connected in parallel to the micro-battery when closing of the switch (15) takes place.

4. Device according to any one of claims 1 to 3, characterized in that the micro-battery (1) comprises a solid electrolyte (5), arranged between first and second electrodes (4, 6), and first and second current collectors (3a, 3b) respectively connected to the first and second electrodes, the micro-supercapacitor (7) being formed by a stacking of layers respectively constituting a bottom current collector (8), a bottom electrode (9), a solid electrolyte (10), a top electrode (11) and a top current collector (12).

5. Device according to claim 4, characterized in that the solid electrolytes (5, 10) of the micro-battery and micro-supercapacitors are made from one and the same material.

6. Device according to any one of claims 1 to 5, characterized in that the micro-battery (1) and micro-supercapacitors (7) are formed on one and the same insulating substrate (12).

7. Device according to claim 6, characterized in that the micro-battery and micro-supercapacitors are formed side by side on the substrate.

8. Device according to claim 6, characterized in that the micro-battery and micro-supercapacitors are stacked.

9. Device according to claim 8, characterized in that it comprises an insulating layer (16) between the negative electrode (6) of the micro-battery and the bottom collector (8a) of the micro-supercapacitor (7a) that is superposed thereon.

10. Device according to claim 9, characterized in that the insulating layer (16) is made of the same material as the solid electrolytes (5, 10) of the micro-battery and micro-supercapacitors.

11. Device according to any one of claims 8 to 10, characterized in that the solid electrolyte layers (10a, 10b and 10c) of the micro-supercapacitors constitute an electrical insulator coating almost all the side faces of the stacking.