Battery and battery pack

Abstract

The provided battery includes a sheathing can housing an electrode immersed in a liquid electrolyte; a sealing cap to block an aperture formed on one end face of the sheathing can; an insulating plate to electrically separate the electrode from the sealing cap; and a relief valve mounted on the sealing cap to discharge gas inside of the sheathing can when an internal pressure in the sheathing can exceeds a predetermined pressure; wherein the insulating plate includes a bottom face, a peripheral rib surrounding a peripheral portion of the bottom face and reinforcing ribs mounted on the bottom face in such a manner that the bottom is partitioned by the at least one reinforcing rib, and has a plurality of divided regions defined by at least one part of the peripheral rib and the at least one reinforcing rib, and wherein a notch is formed on the peripheral rib and the reinforcing ribs surrounding the region located below the relief valve.

1 . A battery comprising: 
 a sheathing can housing an electrode immersed in a liquid electrolyte;    a sealing cap to block an aperture formed on one end face of said sheathing can;    an insulating plate to electrically separate said electrode from said sealing cap; and    a relief valve mounted on said sealing cap to discharge gas inside of said sheathing can when an internal pressure in said sheathing can exceeds a predetermined pressure; and    wherein said insulating plate includes a bottom face, a peripheral rib approximately surrounding a peripheral portion of said bottom face and at least one reinforcing rib mounted on said bottom face in such a manner that said bottom is partitioned by said at least one reinforcing rib, and has a plurality of divided regions defined by at least one part of said peripheral rib and said at least one reinforcing rib, and wherein a notch is formed on at least one portion of at least one part of said peripheral rib and said at least one reinforcing rib surrounding the region located immediately below said relief valve.    
   
   
       2 . The battery according to  claim 1 , wherein an air ventilating opening is formed on said bottom face of said insulating plate in a region located immediately below said relief valve.  
   
   
       3 . The battery according to  claim 1 , wherein said sheathing can comprises an approximately cubic container with a closed bottom end.  
   
   
       4 . The battery according  claim 1 , wherein said sheathing can comprises an approximately cylindrical container with a closed bottom end.  
   
   
       5 . A battery comprising: 
 a sheathing can housing an electrode immersed in a liquid electrolyte;    a sealing cap to block an aperture formed on one end face of said sheathing can;    an insulating plate to electrically separate said electrode from said sealing cap; and    a relief valve mounted on said sealing cap mounted on said sealing cap to discharge gas inside of said sheathing can when an internal pressure in said sheathing can exceeds a predetermined pressure, and    wherein said insulating plate includes a bottom face, a peripheral rib approximately surrounding a peripheral portion of said bottom face and at least one reinforcing rib mounted on said bottom face, in such a manner that said bottom is not partitioned into a plurality of regions by said at least one reinforcing rib.    
   
   
       6 . The battery according to  claim 5 , wherein an air ventilating opening is formed on the bottom face of said insulating plate and below said relief valve.  
   
   
       7 . The battery according to  claim 5 , wherein said sheathing can comprises an approximately cubic container with a closed bottom end.  
   
   
       8 . The battery according  claim 5 , wherein said sheathing can comprises an approximately cylindrical container with a closed bottom end.  
   
   
       9 . A battery comprising: 
 a sheathing can housing an electrode immersed in a liquid electrolyte;    a sealing cap to block an aperture formed on one end face of said sheathing can;    an insulating plate to electrically separate said electrode from said sealing cap; and    a relief valve mounted on said sealing cap mounted on said sealing cap to discharge gas inside of said sheathing can when an internal pressure in said sheathing can exceeds a predetermined pressure, and    wherein said insulating plate includes a bottom face, a peripheral rib approximately surrounding a peripheral portion of said bottom face and a plurality of reinforcing ribs are formed on said bottom face in a meandering manner.    
   
   
       10 . The battery according to  claim 9 , wherein said sheathing can comprises an approximately cubic container with a closed bottom end.  
   
   
       11 . The battery according  claim 9 , wherein said sheathing can comprises an approximately cylindrical container with a closed bottom end.  
   
   
       12 . A battery pack housing at least one battery, 
 wherein the battery comprises:    a sheathing can housing an electrode immersed in a liquid electrolyte;    a sealing cap to block an aperture formed on one end face of said sheathing can;    an insulating plate to electrically separate said electrode from said sealing cap; and    a relief valve mounted on said sealing cap to discharge gas inside of said sheathing can when an internal pressure in said sheathing can exceeds a predetermined pressure; and    wherein said insulating plate includes a bottom face, a peripheral rib approximately surrounding a peripheral portion of said bottom face and at least one reinforcing rib mounted on said bottom face in such a manner that said bottom is partitioned by said at least one reinforcing rib, and has a plurality of divided regions defined by at least one part of said peripheral rib and said at least one reinforcing rib, and wherein a notch is formed on at least one portion of at least one part of said peripheral rib and said at least one reinforcing rib surrounding the region located immediately below said relief valve.    
   
   
       13 . A battery pack housing at least one battery, 
 wherein the battery comprises:    a sheathing can housing an electrode immersed in a liquid electrolyte;    a sealing cap to block an aperture formed on one end face of said sheathing can;    an insulating plate to electrically separate said electrode from said sealing cap; and    a relief valve mounted on said sealing cap mounted on said sealing cap to discharge gas inside of said sheathing can when an internal pressure in said sheathing can exceeds a predetermined pressure, and    wherein said insulating plate includes a bottom face, a peripheral rib approximately surrounding a peripheral portion of said bottom face and at least one reinforcing rib mounted on said bottom face, in such a manner that said bottom is not partitioned into a plurality of regions by said at least one reinforcing rib.    
   
   
       14 . A battery pack housing at least one battery, 
 wherein the battery comprises:    a sheathing can housing an electrode immersed in a liquid electrolyte;    a sealing cap to block an aperture formed on one end face of said sheathing can;    an insulating plate to electrically separate said electrode from said sealing cap; and    a relief valve mounted on said sealing cap mounted on said sealing cap to discharge gas inside of said sheathing can when an internal pressure in said sheathing can exceeds a predetermined pressure, and    wherein said insulating plate includes a bottom face, a peripheral rib approximately surrounding a peripheral portion of said bottom face and a plurality of reinforcing ribs are formed on said bottom face in a meandering manner.