Browse Prior Art Database

Ultra Thin Double Layer Capacitor

IP.com Disclosure Number: IPCOM000116424D
Original Publication Date: 1995-Sep-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 75K

Publishing Venue

IBM

Related People

Franzo, CJ: AUTHOR

Abstract

A method of constructing a very thin Double Layer Capacitor (DLC) or Electrochemical Double Layer Capacitor (EDLC) is disclosed. The new capacitor will achieve thicknesses which are compatible with low height applications such as PCMCIA cards, while maintaining the same high capacitance, quality and reliability as the thicker versions as compared to traditional rechargeable battery solutions.

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Ultra Thin Double Layer Capacitor

      A method of constructing a very thin Double Layer Capacitor
(DLC) or Electrochemical Double Layer Capacitor (EDLC) is disclosed.
The new capacitor will achieve thicknesses which are compatible with
low height applications such as PCMCIA cards, while maintaining the
same high capacitance, quality and reliability as the thicker
versions as compared to traditional rechargeable battery solutions.

      Double layer capacitors and electrochemical double layer
capacitors are typically manufactured by assembling together a number
of basic cells in a vertical fashion such that the final height is in
the order of 4-5 mm.  These basic cells, shown in Fig. 1, are in turn
manufactured by "sandwiching" together electrodes (1) (6), separating
membrane (3) and current  collecting plates (2) (5).  The whole cell
is surrounded by an insulating material (4) (7).

      Fig. 2 shows a cross-section of the proposed innovative
packaging scheme.  The new device would still be constructed of the
same materials as the present day devices and conserve the present
basic cell structure (Fig. 1).  However, the basic cells' arrangement
would be different.  For instance, instead of stacking all basic
cells one on top of each other, it is proposed to stack the basic
cells in an "up-down" configuration.

That is:
  o  one or more basic cells are first stacked one on top of each
      other
  o  the top most cell will have an extended curre...