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Resistance-stabilizing additives for electrolyte

a technology of resistivity stabilizing additives and electrolyte, which is applied in the field of additives in electrolyte for batteries, can solve problems such as reducing the power capacity of batteries

Inactive Publication Date: 2010-06-03
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the passivation film increases internal resistance which reduces the power capability of the battery.

Method used

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  • Resistance-stabilizing additives for electrolyte
  • Resistance-stabilizing additives for electrolyte
  • Resistance-stabilizing additives for electrolyte

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Embodiment Construction

[0014]The following description of embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. For purposes of clarity, the same reference numbers are used in the drawings to identify similar elements.

[0015]The present invention is directed to an additive for an electrolyte. The additive stabilizes resistance of the battery during storage, thermal processing, and throughout discharge. A resistance-stabilizing additive is defined as one or more chemical compounds, added to an electrolyte, that causes a battery to exhibit low resistance (i.e. generally below 500 ohm centimeter (cm)2) throughout the battery's useful life. In one embodiment, the additive is characterized by an electron withdrawing group. Exemplary chemical compounds containing electron withdrawing group include 2,2,2-trifluoroacetamide, and benzoyl acetone. In another embodiment, an organic acid serves as a resistance-stabilizing additive. Exemplary organic acids...

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Abstract

A resistance-stabilizing additive to an electrolyte for a battery cell in an implantable medical device is presented. At least one resistance-stabilizing additive is selected from a group comprising an electron withdrawing group, an aromatic diacid salt, an inorganic salt, an aliphatic organic acid, an aromatic diacid, and an aromatic monoacid.

Description

RELATED APPLICATION[0001]This application is related to, and claims the benefit of, U.S. patent application Ser. No. 10 / 876,003 filed Feb. 13, 2003 entitled “Liquid Electrolyte For An Electrochemical Cell, Electrochemical Cell And Implantable Medical Device”, which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention generally relates to an electrochemical cell and, more particularly, to an additive in an electrolyte for a battery.BACKGROUND OF THE INVENTION[0003]Implantable medical devices (IMDs) detect and treat a variety of medical conditions in patients. IMDs include implantable pulse generators (IPGs) or implantable cardioverter-defibrillators (ICDs) that deliver electrical stimuli to tissue of a patient. ICDs typically comprise, inter alia, a control module, a capacitor, and a battery that are housed in a hermetically sealed container. When therapy is required by a patient, the control module signals the battery to charge the ca...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M6/04H01M10/0567
CPCH01M10/0567Y02E60/10
Inventor MERRITT, DONALD R.SCHMIDT, CRAIG L.
Owner MEDTRONIC INC