Type of secondary battery

Abstract

This invention describes a type of secondary batteries. The bottom of the secondary battery is installed with a safety device that includes a conductive current interrupting device (CID) and a support component. In installing the safety device on the bottoms of the batteries, the batteries' manufacturing processes are simplified, their production costs are lowered, and the space utilization inside of the battery is increased. In addition, the battery manufacturing process can use sealed or unsealed methods.

1 . (canceled) 
     
     
         2 . A secondary battery, comprising:
 a battery shell having a first end and a second end, wherein said first end is sealed and said second end is sealed by a cover structure;   a battery core encased in said battery shell, wherein said battery core having a positive electrode, a negative electrode, a positive tab, and a negative tab;   electrolyte provided inside said battery shell; and   a safety device disposed within said battery shell, where said safety device has a conductive CID, and a non-conductive support component, wherein said support component comprises a support piece, and a solder attachment position;   wherein said support piece supports the CID on said support component, and wherein said solder attachment position being soldered in said battery shell.   
     
     
         3 . A secondary battery of  claim 2  wherein said battery shell have a top end and a bottom end and said first end is said bottom end, and said bottom end having an inner surface; wherein said solder attachment position is soldered on to the inner surface of the bottom end of the battery shell. 
     
     
         4 . A secondary battery of  claim 2  wherein there is an insulation component between said battery core and said CID; wherein said support piece is squeezed tight between said support component and said insulation component to support said CID on said support component. 
     
     
         5 . A secondary battery of  claim 2  wherein the cross-section of the CID is an inversed L-shape having a horizontal portion and a vertical portion, wherein the horizontal portion is the support piece and the vertical portion is the solder attachment position. 
     
     
         6 . A secondary battery of  claim 2  wherein said CID has a groove shaped structure having a bottom and a groove wall, wherein said solder attachment position is at the bottom of the groove shaped structure, and wherein the groove wall is the support piece. 
     
     
         7 . A secondary battery of  claim 7  wherein said support piece is an arm extending from the groove shaped structure. 
     
     
         8 . A secondary battery of  claim 2  wherein the CID has a funnel-shaped body. 
     
     
         9 . A secondary battery of  claim 8  wherein the support piece is a cantilever extending from the funnel-shaped body. 
     
     
         10 . A secondary battery of  claim 8  wherein the solder attachment position is at the funnel-shaped body. 
     
     
         11 . A secondary battery of  claim 8  wherein there are through-holes on the funnel-shaped body. 
     
     
         12 . A secondary battery of  claim 8  wherein the thickness of the support piece is greater than or equal to 0.2 mm and the thickness of the bottom portion of the funnel-shaped body is 0.01 mm to 1 mm. 
     
     
         13 . A secondary battery of  claim 8  wherein the thickness of the bottom portion of the funnel-shaped body is 0.05 mm to 0.3 mm. 
     
     
         14 . A secondary battery of  claim 2  wherein the support component is a ring shaped structure. 
     
     
         15 . A secondary battery of  claim 14  wherein the solder attachment position attaches through the ring shaped structure of the support component to the battery shell. 
     
     
         16 . A secondary battery of  claim 2  wherein the strength of the solder structure between the solder attachment position and the shell is greater than the stretching strength of the CID. 
     
     
         17 . A secondary battery of  claim 2  wherein the strength of the solder structure between the solder attachment position and the shell is less than the stretching strength of the CID. 
     
     
         18 . A secondary battery, comprising:
 a battery shell having a top end and a bottom end, wherein said bottom end has an inner surface;   a battery core encased in said battery shell, wherein said battery core having a positive electrode, a negative electrode, a positive tab, and a negative tab;   electrolyte provided inside said battery shell;   a safety device disposed within said battery shell, wherein said safety device has a conductive CID, and a non-conductive support component, wherein said support component comprises a support piece, and a solder attachment position, wherein the support component is a ring shaped structure, wherein said support piece is fixed on said support component to support said CID on said support component, and wherein the solder attachment position is soldered on to the inner surface of the bottom end of the battery shell; and   an insulation component disposed between said battery core and said CID, wherein said support piece is squeezed tight between said support component and said insulation component to support said CID on said support component.   
     
     
         19 . A secondary battery of  claim 18  wherein the cross-section of the CID is an inversed L-shape having a horizontal portion and a vertical portion, wherein the horizontal portion is the support piece and the vertical portion is the solder attachment position. 
     
     
         20 . A secondary battery of  claim 18  wherein said CID has a groove shaped structure having a bottom and a groove wall, wherein said solder attachment position is at the bottom of the groove shaped structure, wherein the groove wall is the support piece, and wherein said support piece is an arm extending from the groove shaped structure. 
     
     
         21 . A secondary battery of  claim 18  wherein the CID has a funnel-shaped body, wherein the support piece is a cantilever extending from the funnel-shaped body, wherein the solder attachment position is at the funnel-shaped body, wherein there are through-holes on the funnel-shaped body, and wherein the solder attachment position attaches through the ring shaped structure of the support component to the battery shell.