Lithium-ion battery having desirable safety performance

Abstract

A lithium-ion battery having desirable safety performance includes a positive plate having a positive film, a negative plate having a negative film, a separator between the positive plate and the negative plate, and electrolyte. The positive film is provided with a first recess and a positive lead is soldered in the first recess. The negative film is provided with a second recess and a negative lead is soldered in the second recess. Upper and lower surfaces of the positive lead each is formed with a first insulating glue layer. Surface of the positive film corresponding to the second recess is pasted with a second insulating glue layer.

What is claimed is: 
     
         1 . A battery, comprising:
 a first plate, including a first film and a first lead;   a first insulating glue layer, disposed on a surface of the first lead;   a second plate, including a second lead;   wherein a second insulating glue layer is disposed on a surface of the first film corresponding to the second lead.   
     
     
         2 . The battery of  claim 1 , wherein the first plate comprises a first current collector, the first film and the first lead, the first film being disposed on the first current collector, the first lead being electrically connected with the first current collector, the first film comprises:
 a first recess configured to receive the first lead;   a second plate, including a second current collector, a second film and a second lead, the second film being disposed on the second current collector, the second lead being electrically connected with the second current collector, the second film being provided with a second recess configured to receive the second lead.   
     
     
         3 . The battery of  claim 2 , wherein:
 the first plate is a positive plate, the first current collector is a positive current collector, the first film is a positive film, the first lead is a positive lead;   the second plate is a negative plate, the second current collector is a negative current collector, the second film is a negative film, the second lead is a negative lead.   
     
     
         4 . The battery of  claim 3 , wherein a width of the second insulating glue layer is greater than a width of the second recess, and a length of the second insulating glue layer is greater than a length of the second recess. 
     
     
         5 . The battery of  claim 3 , wherein a distance between a center of the first recess and an end of the positive film is ¼˜¾ of a length of the positive film, and a distance between a center of the second recess and an end of the negative film is ¼˜¾ of a length of the negative film. 
     
     
         6 . The battery of  claim 3 , wherein a distance between a center of the first recess and an end of the positive film is half of a length of the positive film, and a distance between a center of the second recess and an end of the negative film is half of a length of the negative film. 
     
     
         7 . The battery of  claim 3 , wherein a length of the first recess is less than a length of the positive lead by 1˜100 mm, a width of the first recess is greater than a width of the positive lead by 1˜10 mm;
 a length of the second recess is less than a length of the negative lead by 1˜100 mm, a width of the second recess is greater than a width of the negative lead by 1˜10 mm. 
 
     
     
         8 . The battery of  claim 3 , wherein a width of the first recess is less than a width of the positive film by 1˜100 mm, and a width of the second recess is less than a width of the negative film by 1˜100 mm. 
     
     
         9 . The battery of  claim 3 , wherein a depth of the first recess is no larger than a thickness of the positive film, and a depth of the second recess is no larger than a thickness of the negative film. 
     
     
         10 . The battery of  claim 3 , wherein a depth of the first recess is greater than a thickness of the positive lead by 0.005˜0.1 mm, and a depth of the second recess is greater than a thickness of the negative lead by 0.005˜0.1 mm.