Packing structure for lithium ion polymer battery

Abstract

Disclosed is a packing structure for a lithium ion polymer battery, which includes: a battery casing including a lower multilayer polymer and an upper multilayer polymer, wherein the lower multilayer polymer has an inner space of a predetermined size for housing at least one electrode assembly and an electrolyte and is provided with an extension portion extending radially and outwardly from a top edge of each vertical portion of the lower multilayer polymer, a part of the upper multilayer polymer is coupled rotatably to a part of the extension portion of the lower multilayer polymer and remaining parts of the upper multilayer polymer are sealed to remaining parts of the extension portion of the lower multilayer polymer; and a battery protection member, which wraps the outer circumference of the battery casing so that the battery contained in the battery casing can be protected from external impact, and is fixed integrally by a part of the sealed extension portions. The packing structure can protect a battery from external impact while minimizing an increase in size of the whole battery.

1 . A packing structure for a lithium ion polymer battery, which comprises: 
 a battery casing including a lower multilayer polymer and an upper multilayer polymer, wherein the lower multilayer polymer has an inner space of a predetermined size for housing at least one electrode assembly and an electrolyte and is provided with an extension portion extending radially and outwardly from a top edge of each vertical portion of the lower multilayer polymer, a part of the upper multilayer polymer is coupled rotatably to a part of the extension portion of the lower multilayer polymer and remaining parts of the upper multilayer polymer are sealed to remaining parts of the extension portion of the lower multilayer polymer; and    a battery protection member, which wraps outer circumference of the battery casing so that the battery contained in the battery casing can be protected from external impact, and is fixed integrally by a part of the sealed extension portions.    
   
   
       2 . The packing structure for a lithium ion polymer battery according to  claim 1 , wherein the battery protection member is a hollow frame facing to edges of the battery casing.  
   
   
       3 . The packing structure for a lithium ion polymer battery according to  claim 2 , wherein at least one crossing member facing to an outer surface of the battery casing is formed on one side of the hollow frame at predetermined intervals.  
   
   
       4 . The packing structure for a lithium ion polymer battery according to  claim 1 , wherein the battery protection member is a cover for tightly wrapping outer surfaces of the lower multilayer polymer forming one side of the battery casing.  
   
   
       5 . The packing structure for a lithium ion polymer battery according to  claim 1 , wherein the battery protection member is a “ ”-shaped battery protection member which wraps both top surface and bottom surface of the battery casing.  
   
   
       6 . The packing structure for a lithium ion polymer battery according to  claim 5 , wherein a vertical extension portion for wrapping lateral surfaces of the battery casing is formed at both sides of the “ ”-shaped battery protection member.  
   
   
       7 . The packing structure for a lithium ion polymer battery according to any one of  claims 1  to  6 , wherein a front part of the extension portion facing to both electrode terminals protruded out from the battery casing is fitted with a PCB (protection circuit board) in such a manner that the PCB can be coupled detachably with the battery protection member, the PCB being provided with a battery protection circuit connected to both electrode terminals so as to prevent overcharge or overdischarge of the battery and an outlet port for making electric connections between both electrode terminals of the battery and an external device through the battery protection circuit.  
   
   
       8 . The packing structure for a lithium ion polymer battery according to any one of claims  1 ,  2  and  4 , wherein the battery protection member is integrally formed with a PCB (protection circuit board), the PCB being provided with a battery protection circuit connected to both electrode terminals so as to prevent overcharge or overdischarge of the battery and an outlet port for making electric connections between both electrode terminals of the battery and an external device through the battery protection circuit.