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Method for dynamically reconfiguring storage cells

IP.com Disclosure Number: IPCOM000010723D
Publication Date: 2003-Jan-15
Document File: 4 page(s) / 269K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for dynamically reconfiguring storage cells. Benefits include improved functionality and improved performance.

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Method for dynamically reconfiguring storage cells

Disclosed is a method for dynamically reconfiguring storage cells. Benefits include improved functionality and improved performance.

Background

        � � � � � The recent development of very high-capacity storage capacitors (on the order of 2000+ Farads) enables the development of power storage packs with unique features. The capacitors can be quick-charged in a few minutes or seconds without damage. These capacitors can be power-cycled at any state of discharge without memory effects that reduce power storage capacity. The capacitors can provide full dissipation of their stored power at very low temperatures and have a practically indefinite shelf life.

        � � � � � Conventional batteries dissipate most of their stored energy with little voltage drop. The voltage only drops to zero when the last 10% of the stored power is exhausted.

        � � � � � Most rechargeable storage cell power packs have a fixed electrical configuration.

        � � � � � Most conventional power packs are of a fixed series-connected configuration. If one of the storage cells become damaged or weak, the entire power pack is rendered useless.

        � � � � � Smart battery chargers typically complete the discharge of a battery pack when the voltages have fallen too low for the originally powered device to use.

Description

        � � � � � The disclosed method is the arrangement, connection, and switching for the efficient use of storage cells.

        � � � � � Ultra-high capacity capacitors have linear power/voltage dissipation. To keep the voltage within an optimal window for the device being powered, the individual storage cells are arranged and connected in series (see Figure 1). This arrangement keeps the output voltage within the optimal window for the device being powered as the storage cells are depleted. The reverse of this stacking occurs when these devices are quick-charged.

        � � � � � A myriad of cells that are charged in parallel require no equalizing resistors or equilibrating circuitry to insure that any individual cell does not exceed its voltage rating. Small differences in effective series resistance (ESR) for series-connected storage devices can lead to large differences in voltage potentials across any individual cell when charging.

                � � � � � � � � � � � The disclosed method includes an automated means for switching cells during discharge and recharge (see Figure 2). Smart power packs that can reconfigure their electr...