Secondary Battery and Battery Module Having the Same

Abstract

A secondary battery includes: an electrode assembly; a sheet-type exterior configured to accommodate the electrode assembly; and a plurality of temperature sensing parts provided adjacent to the exterior to sense a temperature of a plurality of areas, respectively, of the exterior, wherein at least one of the plurality of temperature sensing parts includes: a positive temperature coefficient (PTC) element; and a negative temperature coefficient (NTC) element.

1 . A secondary battery comprising:
 an electrode assembly;   a sheet-type exterior configured to accommodate the electrode assembly; and   a plurality of temperature sensing parts provided adjacent to the exterior to sense a temperature of a plurality of areas, respectively, of the exterior,   wherein at least one of the plurality of temperature sensing parts comprises:   a positive temperature coefficient (PTC) element; and   a negative temperature coefficient (NTC) element.   
     
     
         2 . The secondary battery of  claim 1 , further comprising an electrode lead having a shape that protrudes outward,
 wherein one of the at least one of the plurality of temperature sensing parts provided with the NTC element is adjacent to the electrode lead.   
     
     
         3 . The secondary battery of  claim 1 , further comprising a positive electrode lead and a negative electrode lead each having a shape that protrudes outward, and
 wherein one of the at least one of the plurality of temperature sensing parts provided with the NTC element is adjacent to the negative electrode lead.   
     
     
         4 . The secondary battery of  claim 1 , wherein the plurality of temperature sensing parts are attached to a top surface or a bottom surface that is a main plane of the exterior. 
     
     
         5 . The secondary battery of  claim 1 , wherein the plurality of temperature sensing parts are attached to a side surface of the exterior. 
     
     
         6 . The secondary battery of  claim 1 , wherein the exterior comprises:
 a body part having an internal space in which the electrode assembly is accommodated; and   a sealing part configured to seal the internal space of the body part from the outside,   wherein the plurality of temperature sensing parts are attached to the sealing part, and   the sealing part is bent to be in contact with a side surface of the exterior.   
     
     
         7 . The secondary battery of  claim 1 , further comprising an adhesive part adhering to a portion of a surface of the exterior,
 wherein the plurality of temperature sensing parts are attached to the adhesive part.   
     
     
         8 . The secondary battery of  claim 7 , wherein the exterior comprises:
 a body part having an internal space in which the exterior is accommodated; and   a sealing part configured to seal the internal space of the body part from the outside,   wherein the adhesive part adheres together to the sealing part and the body part so that the sealing part is bent to be in contact with a side surface of the exterior.   
     
     
         9 . The secondary battery of  claim 7 , wherein the adhesive part is attached to only an entire top surface or an entire bottom surface that is a main plane of the exterior. 
     
     
         10 . The secondary battery of  claim 1 , wherein a circuit configured to connect the plurality of temperature sensing parts to each other connects the plurality of temperature sensing parts to each other in a zigzag shape. 
     
     
         11 . A battery module comprising:
 the secondary battery of  claim 1 ; and   a controller configured to receive temperature information of the exterior on the plurality of areas to which the plurality of temperature sensing parts of the secondary battery are attached,   wherein, when a temperature at one of the plurality of areas to which the plurality of temperature sensing parts are attached exceeds a predetermined value, the controller (i) interrupts current of the secondary battery or (ii) transmits a warning signal to the outside.   
     
     
         12 . The battery module of  claim 11 , wherein the controller receives temperature information from each of the at least one of the plurality of temperature sensing parts provided with both the PTC element and the NTC element, and
 when a temperature provided from an NTC element exceeds a first reference temperature, the controller transmits the warning signal to the outside.   
     
     
         13 . The battery module of  claim 12 , wherein, when a temperature provided from the NTC element exceeds a second reference temperature, and a temperature provided from the PTC element exceeds a third reference temperature, the controller interrupts the current of the secondary battery. 
     
     
         14 . The battery module of  claim 13 , wherein the second reference temperature is greater than the first reference temperature. 
     
     
         15 . The battery module of  claim 13 , wherein the second reference temperature is the same as the third reference temperature.