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Liquid consuming battery with liquid regulating system

A fluid conditioning system, fluid consumption technology, used in battery packs and batteries, air-assisted and fuel cells and battery packs, which can solve the problems of occupying volume, increasing manufacturing cost and complexity

Inactive Publication Date: 2008-03-12
ENERGIZER BRANDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To increase airflow into the cell only during higher rates of discharge, fans have been used to blow air into the cell (eg US Patent No. 6500575), but fans and their control add cost and complexity to manufacture, And fans, even micro fans, can take up considerable volume in single cells, multi-cell battery packs, and devices
[0008] Another approach that has been proposed is to use valves to control the amount of air entering the battery (eg US Patent 6641947 and US Patent Publication No. 2003 / 0186099), but requires external devices such as fans and / or relatively complex electronics to operate the valves

Method used

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  • Liquid consuming battery with liquid regulating system
  • Liquid consuming battery with liquid regulating system
  • Liquid consuming battery with liquid regulating system

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0081] The actuator sheet can be prepared by any suitable method of preparation. A high speed printing process can be used to prepare the actuator film sheet. Slits may be made in the sheet to form flaps using a rotary die cutting process.

[0082]Another example of a suitable valve is a valve having two or more adjacent plates, each plate having one or more openings, which can be arranged at different angles to vary the size of the opening therethrough. The plates are usually relatively rigid to provide a proper seal in the closed position, movable relative to each other, for example by sliding one of the plates linearly across the other, by rotating one of the plates about an axis, or by sliding Multiple plates. In such an embodiment, the high permeability region of the valve may be part of one or more high permeability membranes adjacent to or secured to a surface of one of the sheets, or the high permeability region may be Only through the openings through adjacent shee...

Embodiment 1

[0099] Prepare single electrode stimulator strips for testing.

[0100] By combining 75 wt% MnO 2 , 20% by weight of graphite and 5% by weight of polytetrafluoroethylene (PTFE) to prepare an electrode mixture. MnO 2 Electrolyte manganese dioxide (EMD), which is an alkaline battery grade, is available from Kerr-McGee Chemical Corp., Oklahoma City, OK, USA. Graphite was grade KS6 natural graphite powder available from Timcal America, Westlake, OH, USA. PTFE was TFE 6C grade TEFLON®, available from E.I. DuPont deNemours & Co., Chicago, IL, USA. Lightly mix the above ingredients using a mortar and pestle.

[0101] To each actuator, 5 g of this mixture was added with enough mineral spirits that the mixture could form a cohesive ball. The electrode mixture balls were rolled using a Swest mill to form electrode strips approximately 0.020 inches (0.508 mm) thick, 2 inches (5.08 cm) long, and 3 / 8 inch (0.953 cm) wide. The electrode strip was placed between two brass plates, press...

Embodiment 2

[0103] Two actuator bars prepared as described in Example 1 were tested to determine their ability to repeatedly bend and straighten when an electric potential was applied.

[0104] Prepare stimulator strips for testing. Lay the exciter strips side by side, keeping the nickel mesh sides away from each other. Fix the extended nickel mesh together so that the two stimulator strips serve as a single working electrode in the test. The stimulator strip was immersed in a beaker containing an aqueous KOH electrolyte along with a zinc reference electrode and a Pt counter electrode.

[0105] The exciter was alternately discharged and then charged with a constant current of about 0.01278 amp for a total of 4 discharge / charge cycles. The first discharge lasted about 70 minutes, and subsequent discharges and all charges were about 80 minutes each. Observe the exciter bar. Both strips bend during discharge, moving the free ends away from each other, and then straighten during charging,...

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Abstract

The invention is an electrochemical battery cell with a fluid consuming electrode, such as an oxygen reduction electrode, and a fluid regulating system. The fluid regulating system includes a valve for adjusting the rate of passage of the fluid to the fluid consuming electrode. It is operated by an actuator that responds (e.g., by deforming) to changes in a potential applied across the actuator to open or close the valve. The applied potential can be the cell potential or an adjusted potential. The potential applied across the actuator can vary according to the need for more or less fluid in the fluid consuming electrode. The valve can be contained within the cell housing, for example between the fluid consuming electrode and one or more fluid entry ports in the cell housing, or it can be located outside the cell housing.

Description

Background technique [0001] The present invention relates to fluid conditioning systems for controlling the rate at which fluids, such as gases, flow into and out of electrochemical cells and cells having fluid-consuming electrodes, and cells and cells in which such fluid conditioning systems are used, particularly air depolarization chemical, air-assisted and fuel cells and battery packs. [0002] Electrochemical battery cells (such as air depolarized, air-assisted, and fuel cell battery cells) that use fluids from outside the cell (such as oxygen and other gases) as active species to generate electricity can be used to power a variety of portable electronic devices. The device provides electrical energy. For example, air enters an air-depolarized or air-assisted battery where it can be used as the positive active material or it can be recharged. The oxygen reduction electrode promotes the reaction of oxygen and the battery electrolyte, and ultimately oxidizes the negative ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06
CPCH01M2/0452H01M8/04223H01M8/04089Y02E60/50H01M12/06Y02E60/128Y02E60/10H01M50/1537
Inventor J·C·拜利
Owner ENERGIZER BRANDS
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