US2004062985A1PendingUtilityA1

Contoured battery for implantable medical devices and method of manufacture

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Priority: Sep 30, 2002Filed: Sep 30, 2002Published: Apr 1, 2004
Est. expirySep 30, 2022(expired)· nominal 20-yr term from priority
Inventors:Paul B. AamodtFranise D. BartleySteve BruesehoffKurt J. CasbyDavid P. HaasKarl E. HokansonThomas M. NutzmanAndrew J. RiesScott J. RobinsonRandy S. RolesSonja K. SomdahlWalter C. SunderlandJason T. PapenfussWilliam J. FarrellKimberly A. Chaffin
H01M 50/191H01M 50/103H01M 50/121Y02P70/50H01M 50/147H01M 50/24H01M 50/174A61N 1/3975Y10T29/49108B33Y 80/00Y02E60/10
46
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Claims

Abstract

A battery having an electrode assembly located in a housing that efficiently utilizes the space available in many implantable medical devices is disclosed. The battery housing provides a cover and a shallow case a preferably planar, major bottom portion, an open top to receive the cover opposing the bottom portion, and a plurality of sides being radiused at intersections with each other and with the bottom to allow for the close abutting of other components located within the implantable device while also providing for efficient location of the battery within an arcuate edge of the device. The cover and the shallow case being substantially hermetically sealed by a laser weld technique and an insulator member disposed within the case to provide a barrier to incident laser radiation so that during welding radiation does not impinge upon radiation sensitive component(s) disposed within the case.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . An insulator for an electrochemical cell, comprising: 
 a case having a bottom, an open top to receive an electrode assembly, and at least one side extending from said bottom; and    said case being opaque to a laser beam.    
     
     
         2 . An insulator according to  claim 1 , further comprising slots to receive at least one cathode tab and at least one anode tab.  
     
     
         3 . An insulator according to  claim 2 , wherein the slots are located on the at least one side.  
     
     
         4 . An insulator according to  claim 1 , wherein the case bottom is adjacent to a cell cover and provides an electrical barrier between the electrode assembly and the cover.  
     
     
         5 . An insulator according to  claim 4 , wherein the electrode assembly is up to five millimeters from a weld joint joining the cover with a cell housing.  
     
     
         6 . An insulator according to  claim 5 , wherein the case provides a thermal barrier between the weld joint and the electrode assembly.  
     
     
         7 . An insulator according to  claim 6 , wherein the case provides a radiation barrier between the laser beam and the electrode assembly.  
     
     
         8 . An insulator according to  claim 1 , wherein the case is comprised of a material selected from the group consisting of HDDE, polypropylene, polyurethane, and fluoropolymers.  
     
     
         9 . An insulator according to  claim 1 , wherein the case is comprised of ETFE.  
     
     
         10 . An insulator according to  claim 9 , wherein the case is comprised of ETFE comprising a carbon black resin.  
     
     
         11 . An insulator according to  claim 10 , wherein the carbon resin provides the laser beam opacity.  
     
     
         12 . A battery, comprising: 
 a electrode assembly including an anode and a cathode;    an electrolyte;    a battery housing enclosing the electrode assembly and within which the electrode assembly and the electrolyte are disposed, the housing comprising a cover, a shallow case having a substantially planar bottom, an open top to receive the cover; and a plurality of sides; and    an insulator having a bottom, an open top to receive the electrode assembly, and at least one side extending from said bottom; said insulator being opaque to a laser beam.    
     
     
         13 . A battery according to  claim 12 , further comprising slots in the insulator to receive at least one cathode tab and at least one anode tab.  
     
     
         14 . A battery according to  claim 13 , wherein the slots in the insulator are located on the at least one side.  
     
     
         15 . A battery according to  claim 12 , wherein the insulator bottom is adjacent to the cover and provides an electrical barrier between the electrode assembly and the cover.  
     
     
         16 . A battery according to  claim 15 , wherein the electrode assembly is up to five millimeters from a weld joint joining the cover with the case.  
     
     
         17 . A battery according to  claim 16 , wherein the insulator provides a thermal barrier between the weld joint and the electrode assembly.  
     
     
         18 . A battery according to  claim 17 , wherein the insulator provides a radiation barrier between the laser beam and the electrode assembly.  
     
     
         19 . A battery according to  claim 12 , wherein the insulator is comprised of a material selected from the group consisting of HDDE, polypropylene, polyurethane, and fluoropolymers.  
     
     
         20 . A battery according to  claim 12 , wherein the insulator is comprised of ETFE.  
     
     
         21 . A battery according to  claim 20 , wherein the insulator is comprised of ETFE comprising a carbon black resin.  
     
     
         22 . A battery according to  claim 21 , wherein the carbon resin provides the laser beam opacity.  
     
     
         23 . A method of manufacturing a battery, comprising: 
 providing a shallow battery case having an open end, a base located opposite the open end, and a plurality of sides being radiused at intersections with each other and the base;    providing an insulator having a bottom, an open top to receive the electrode assembly, and at least one side extending from said bottom; said case being opaque to a laser beam;    inserting an electrode assembly into the insulator;    placing a cover over the open end of the case, and hermetically sealing the cover to the case; and    placing an electrolyte inside the battery housing.    
     
     
         24 . A method according to  claim 23  wherein the insulator is comprised of slots to receive at least one cathode tab and at least one anode tab.  
     
     
         25 . A method according to  claim 24 , wherein the slots in the insulator are located on the at least one side.  
     
     
         26 . A method according to  claim 23 , wherein the insulator bottom is adjacent to the cover and provides an electrical barrier between the electrode assembly and the cover.  
     
     
         27 . A method according to  claim 26 , wherein the electrode assembly is up to 5 mm from a weld joint creating the hermetic seal.  
     
     
         28 . A method according to  claim 27 , wherein the insulator provides a thermal barrier between the weld joint and the electrode assembly.  
     
     
         29 . A method according to  claim 28 , wherein the insulator provides a radiation barrier between a laser beam and the electrode assembly.

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