Batteries including a flat plate design

Abstract

A battery having flat, stacked, anode and cathode layers. The battery can be adapted to fit within an implantable medical device.

1 . A battery stack comprising an alternating sequence of anodes and cathodes, wherein each cathode has a first separator on one side and a second separator on a second side, wherein the first separator and the second separator are connected to each other around at least a portion of their edges. 
     
     
         2 . The battery stack of  claim 1 , wherein the first separator and the second separator define a flange at the connection of the first separator and the second separator, wherein the flange extends beyond an edge of the cathode and encloses the edge of the cathode. 
     
     
         3 . The battery stack of  claim 1 , wherein the connection between the first separator and the second separator includes a heat seal. 
     
     
         4 . The battery stack of  claim 1 , wherein the first separator and the second separator form a substantially sealed pocket around each cathode. 
     
     
         5 . The battery stack of  claim 4 , wherein a tab of each cathode is exposed beyond the substantially sealed pocket. 
     
     
         6 . The battery stack of  claim 1 , wherein each cathode includes MnO 2 . 
     
     
         7 . A battery stack comprising an alternating sequence of anodes and cathodes, wherein each anode has a first separator on one side and a second separator on a second side, wherein the first separator and the second separator are connected to each other around at least a portion of their edges. 
     
     
         8 . The battery stack of  claim 7 , wherein the first separator and the second separator define a flange at the connection of the first separator and the second separator, wherein the flange extends beyond an edge of the anode and encloses the edge of the anode. 
     
     
         9 . The battery stack of  claim 7 , wherein the connection between the first separator and the second separator includes a heat seal. 
     
     
         10 . The battery stack of  claim 7 , wherein the first separator and the second separator form a substantially sealed pocket around each anode. 
     
     
         11 . The battery stack of  claim 10 , wherein a tab of each anode is exposed beyond the substantially sealed pocket. 
     
     
         12 . A method comprising:
 placing an electrode between first and second separator sheets; and   attaching the first separator sheet to the second separator sheet along a periphery of the electrode to substantially enclose the electrode between the first and second separators.   
     
     
         13 . The method of  claim 12 , wherein attaching the first separator sheet to the second separator sheet includes heat sealing the separator sheets together. 
     
     
         14 . The method of  claim 12 , wherein attaching the first separator sheet to the second separator sheet includes ultrasonic welding the separator sheets together. 
     
     
         15 . The method of  claim 12 , wherein attaching the first separator sheet to the second separator sheet includes hot die sealing the separator sheets together. 
     
     
         16 . The method of  claim 12 , wherein attaching the first separator sheet to the second separator sheet includes inductive heat sealing the separator sheets together. 
     
     
         17 . The method of  claim 12 , wherein the electrode includes a cathode. 
     
     
         18 . The method of  claim 12 , wherein the electrode includes an anode.