US2006093922A1PendingUtilityA1

Composite material tape for lithium secondary battery and lithium secondary battery using the same

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Individually held — no corporate assignee on recordPriority: Sep 22, 2004Filed: Sep 22, 2005Published: May 4, 2006
Est. expirySep 22, 2024(expired)· nominal 20-yr term from priority
Inventors:Cheon-Soo KimHong-Sup LimSang Won Lee
H01M 10/0587H01M 50/595H01M 50/136H01M 50/129H01M 50/586H01M 50/202H01M 50/121H01M 50/119Y02P70/50H01M 10/052H01M 50/571Y02E60/10C09J 2481/006H01M 10/425C09J 2479/086C09J 2423/006C09J 2471/006C09J 2467/006C09J 2301/41C08K 3/28C09J 7/22H01M 2200/00C08K 3/20
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Claims

Abstract

A composite material tape and a lithium secondary battery using the same are provided. The composite material tape includes an organic base and at least one inorganic element dispersed within the organic base. The composite material tapes of the present invention exhibit improved insulative and heat-resistant characteristics.

Claims

exact text as granted — not AI-modified
1 . A composite material tape for a lithium secondary battery, the composite material tape comprising: 
 an organic base; and    at least one inorganic element dispersed in the organic base.    
   
   
       2 . The composite material tape as claimed in  claim 1 , further comprising at least one adhesive layer.  
   
   
       3 . The composite material tape as claimed in  claim 1 , wherein the organic base comprises a material selected from the group consisting of polyimide (PI), polyethyleneterephthalate (PET), polypropylene (PP), polyphenylene sulfide (PPS), polyethylene (PE) and polyphenyleneether (PPE).  
   
   
       4 . The composite material tape as claimed in  claim 1 , wherein the inorganic element comprises a material selected from the group consisting of oxides and nitrides, wherein the oxide is selected from the group consisting of Al 2 O 3 , TiO 2 , ZrO 2 , SiO 2 , MnO 2  and MgO and mixtures thereof, and the nitride is selected from the group consisting of Si 3 N 4 , BN and mixtures thereof.  
   
   
       5 . The composite material tape as claimed in  claim 1 , wherein the inorganic element has a shape selected from the group consisting of spheres, whiskers and plates.  
   
   
       6 . The composite material tape as claimed in  claim 5 , wherein a diameter of a spherical inorganic element is less than half a thickness of the composite material tape, and wherein a thickness of a whisker shaped or plate shaped inorganic element is less than half the thickness of the composite material tape.  
   
   
       7 . The composite material tape as claimed in  claim 1 , wherein the composite material tape comprises from about 20 to about 80 weight percent inorganic elements.  
   
   
       8 . The composite material tape as claimed in  claim 1 , wherein the composite material tape comprises from about 20 to about 80 volume percent inorganic elements.  
   
   
       9 . The composite material tape as claimed in  claim 8 , wherein the composite material tape comprises from about 20 to about 50 volume percent inorganic elements.  
   
   
       10 . The composite material tape as claimed in  claim 1 , wherein the composite material tape has a thickness of about 5 to about 200 μm.  
   
   
       11 . A lithium secondary battery comprising: 
 an electrode assembly comprising: 
 a first electrode plate having a first electrode collector, the first electrode collector comprising a coated region and an uncoated region;  
 a second electrode plate having a second electrode collector, the second electrode collector comprising a coated region and an uncoated region, and  
 a separator positioned between the first and second electrode plates;  
   a first electrode tab attached to a first surface of the uncoated region of the first electrode collector;    a second electrode tab attached to a second surface of the uncoated region of the second electrode collector,    a first adiabatic plate attached to a second surface of the uncoated region of the first electrode collector, wherein the first adiabatic plate comprises an organic base and at least one inorganic element dispersed in the organic base.    
   
   
       12 . The lithium secondary battery as claimed in  claim 11 , further comprising a second adiabatic plate attached to a second surface of the uncoated region of the second electrode collector, wherein the second adiabatic plate comprises an organic base and at least one inorganic element dispersed in the organic base.  
   
   
       13 . The lithium secondary battery as claimed in  claim 12 , wherein the first and second adiabatic plates each comprise a composite material tape according to  claim 2 .  
   
   
       14 . The lithium secondary battery as claimed in  claim 13 , wherein the organic base of the composite material tape comprises a material selected from the group consisting of polyimide (PI), polyethyleneterephthalate (PET), polypropylene (PP), polyphenylene sulfide (PPS), polyethylene (PE) and polyphenyleneether (PPE).  
   
   
       15 . The lithium secondary battery as claimed in  claim 13 , wherein the inorganic element of the composite material tape comprises a material selected from the group consisting of oxides and nitrides, wherein the oxide is selected from the group consisting of Al 2 O 3 , TiO 2 , ZrO 2 , SiO 2 , MnO 2  and MgO and mixtures thereof, and the nitride is selected from the group consisting of Si 3 N 4 , BN and mixtures thereof.  
   
   
       16 . The lithium secondary battery as claimed in  claim 13 , wherein the composite material tape comprises from about 20 to about 80 weight percent inorganic elements.  
   
   
       17 . The lithium secondary battery as claimed in  claim 13 , wherein the composite material tape comprises from about 20 to about 80 volume percent inorganic elements.  
   
   
       18 . The lithium secondary battery as claimed in  claim 12 , wherein a thickness of the second adiabatic plate is less than a thickness of the first adiabatic plate.  
   
   
       19 . The lithium secondary battery as claimed in  claim 11 , further comprising a first insulation layer covering the positive electrode tab and a second insulation layer covering the negative electrode tab.  
   
   
       20 . A lithium secondary battery comprising: 
 an electrode assembly comprising: 
 a first electrode plate having a coated region, the coated region having at least one protrusion,  
 a second electrode plate having a coated region, the coated region having at least one protrusion, and  
 a separator positioned between the first and second electrode plates; and  
   an insulation tape covering the at least one protrusion on the coating regions of the first and second electrode plates, wherein the insulation tape comprises a composite material tape having an organic base and an inorganic element dispersed within the organic base.    
   
   
       21 . The lithium secondary battery as claimed in  claim 20 , wherein the insulation tape comprises a composite material tape according to  claim 2 .  
   
   
       22 . The lithium secondary battery as claimed in  claim 21 , wherein the organic base of the composite material tape comprises a material selected from the group consisting of polyimide (PI), polyethyleneterephthalate (PET), polypropylene (PP), polyphenylene sulfide (PPS), polyethylene (PE) and polyphenyleneether (PPE).  
   
   
       23 . The lithium secondary battery as claimed in  claim 21 , wherein the inorganic element of the composite material tape comprises a material selected from the group consisting of oxides and nitrides, wherein the oxide is selected from the group consisting of Al 2 O 3 , TiO 2 , ZrO 2 , SiO 2 , MnO 2  and MgO and mixtures thereof, and the nitride is selected from the group consisting of Si 3 N 4 , BN and mixtures thereof.  
   
   
       24 . The lithium secondary battery as claimed in  claim 21 , wherein the composite material tape comprises from about 20 to about 80 weight percent inorganic elements.  
   
   
       25 . The lithium secondary battery as claimed in  claim 21 , wherein the composite material tape comprises from about 20 to about 80 volume percent inorganic elements.  
   
   
       26 . A lithium secondary battery comprising: 
 a wound electrode assembly comprising: 
 a first electrode plate having a first electrode collector, the first electrode collector having a coated region and an uncoated region,  
 a second electrode plate having a second electrode collector, the second electrode collector having a coated region and an uncoated region, and  
 a separator positioned between the first and second electrode plates;  
   a first electrode tab attached the uncoated region of the first electrode collector,    a second electrode tab attached to the uncoated region of the second electrode collector; and    a first insulation tape attached to the separator at a position corresponding to the uncoated region of the second electrode collector, the insulation tape being positioned on an inner periphery of the wound electrode assembly, wherein the insulation tape comprises a composite material tape having an organic base and at least one inorganic element dispersed within the base.    
   
   
       27 . The lithium secondary battery as claimed in  claim 26 , wherein the first insulation tape comprises a composite material tape according to  claim 2 .  
   
   
       28 . The lithium secondary battery as claimed in  claim 26 , wherein the first insulation tape is attached to a region of the separator that does not contact the uncoated region of the second electrode collector.  
   
   
       29 . The lithium secondary battery as claimed in  claim 26 , further comprising a second insulation tape attached to a region of the separator corresponding to the uncoated region of the first electrode, a portion of the second insulation tape being attached to a portion of the coated region of the first electrode collector, the second insulation tape being located at an outer periphery of the wound electrode assembly.  
   
   
       30 . A pouch type secondary battery comprising: 
 a wound electrode assembly comprising: 
 a first electrode plate having a first electrode collector, the first electrode collector having a coated region and an uncoated region,  
 a second electrode plate having a second electrode collector, the second electrode collector having a coated region and an uncoated region, and  
 a separator positioned between the first and second electrode plates;  
   a first electrode tab attached the uncoated region of the first electrode collector,    a second electrode tab attached to the uncoated region of the second electrode collector; and    a pouch for containing the wound electrode assembly, wherein a portion of each of the first and second electrode tabs extend out of the pouch; and    a first insulation tape attached to a portion of the first electrode tab which contacts the pouch, wherein the first insulation tape comprises a composite material tape having an organic base and at least one inorganic element dispersed within the base.    
   
   
       31 . The pouch type secondary battery as claimed in  claim 30 , wherein the first insulation tape comprises the composite material tape of  claim 2 .  
   
   
       32 . The pouch type secondary battery as claimed in  claim 30 , further comprising a second insulation tape attached to a portion of the second electrode tab which contacts the pouch, wherein the second insulation tape comprises the composite material tape of  claim 2 .  
   
   
       33 . A pouch type secondary battery comprising: 
 a wound electrode assembly comprising: 
 a first electrode plate having a first electrode collector, the first electrode collector having a coated region and an uncoated region,  
 a second electrode plate having a second electrode collector, the second electrode collector having a coated region and an uncoated region, and  
 a separator positioned between the first and second electrode plates;  
   a first electrode tab attached the uncoated region of the first electrode collector,    a second electrode tab attached to the uncoated region of the second electrode collector;    a protective circuit module electrically connected to the electrode assembly; and    a first adiabatic tape attached between the electrode assembly and the protective circuit module, wherein the adiabatic tape comprises a composite material tape having an organic base and at least one inorganic element dispersed within the base.    
   
   
       34 . The pouch type secondary battery as claimed in  claim 3 , wherein the adiabatic tape comprises the composite material tape of  claim 2 .  
   
   
       35 . A pack type secondary battery comprising: 
 a wound electrode assembly comprising: 
 a first electrode plate having a first electrode collector, the first electrode collector having a coated region and an uncoated region,  
 a second electrode plate having a second electrode collector, the second electrode collector having a coated region and an uncoated region, and  
 a separator positioned between the first and second electrode plates;  
   a first electrode tab attached the uncoated region of the first electrode collector,    a second electrode tab attached to the uncoated region of the second electrode collector; and    a protective circuit module electrically connected to the electrode assembly;    a container for containing the electrode assembly and the protective circuit module, the container comprising first and second cases; and    a first adhesive tape positioned between the electrode assembly and either the first or second case, wherein the adhesive tape comprises the composite material tape of  claim 2 .    
   
   
       36 . The pack type secondary battery as claimed in  claim 35 , wherein the inorganic element of the adhesive tape comprises Al 2 O 3 .

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