WO2015046721A1 - 누설 경로 차단용 융기부가 형성되어 있는 안전벤트를 포함하는 캡 조립체 및 이를 포함하는 리튬 이차전지 - Google Patents
누설 경로 차단용 융기부가 형성되어 있는 안전벤트를 포함하는 캡 조립체 및 이를 포함하는 리튬 이차전지 Download PDFInfo
- Publication number
- WO2015046721A1 WO2015046721A1 PCT/KR2014/005830 KR2014005830W WO2015046721A1 WO 2015046721 A1 WO2015046721 A1 WO 2015046721A1 KR 2014005830 W KR2014005830 W KR 2014005830W WO 2015046721 A1 WO2015046721 A1 WO 2015046721A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cap assembly
- coupling
- coupling portion
- ridge
- welding
- Prior art date
Links
- 230000000903 blocking effect Effects 0.000 title claims abstract description 28
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title abstract description 7
- 229910052744 lithium Inorganic materials 0.000 title abstract description 7
- 230000008878 coupling Effects 0.000 claims abstract description 82
- 238000010168 coupling process Methods 0.000 claims abstract description 82
- 238000005859 coupling reaction Methods 0.000 claims abstract description 82
- 238000003466 welding Methods 0.000 claims description 27
- 239000003792 electrolyte Substances 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000005304 joining Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 5
- 239000010953 base metal Substances 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/591—Covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a lithium secondary battery capable of repeated charging and discharging, and more particularly, to a lithium secondary battery exhibiting improved safety as compared with the prior art.
- secondary batteries are classified into cylindrical batteries and rectangular batteries in which the electrode assembly is embedded in a cylindrical or rectangular metal can, and pouch-type batteries in which the electrode assembly is embedded in a pouch type case of an aluminum laminate sheet. .
- FIG. 1 is a vertical cross-sectional perspective view of a typical cylindrical battery.
- the cylindrical secondary battery 100 receives a jelly-roll type (wound) electrode assembly 120 in a cylindrical can 130 and injects an electrolyte solution into the cylindrical can 130, and then a cylindrical can (
- the top cap 140 having an electrode terminal (for example, a positive electrode terminal; not shown) is formed at an open upper end of the 130.
- the electrode assembly 120 has a structure in which a cathode 121, a cathode 122, and a separator 123 are interposed therebetween, and are wound in a round shape.
- a cylindrical center pin is formed at its core (center of jelly-roll). 150 is inserted.
- the center pin 150 is generally made of a metal material to impart a predetermined strength, and has a hollow cylindrical structure in which a plate is rounded.
- the center pin 150 acts as a passage for fixing and supporting the electrode assembly and for discharging gas generated by internal reaction during charging and discharging and operation.
- the top cap 140 forms a positive electrode terminal in a protruding shape, and a gas discharge port is perforated, and a PTC element that cuts off current by greatly increasing battery resistance when the temperature inside the battery rises below it.
- a PTC element that cuts off current by greatly increasing battery resistance when the temperature inside the battery rises below it.
- the safety vent 143 that bursts when the pressure rises inside the battery to exhaust the gas, and one side of the upper side is coupled to the safety vent 143, the lower one side through the lead 146
- Connection plates 145 connected to the anode of the electrode assembly 144 are sequentially positioned.
- the present invention unlike the conventional lithium secondary battery, to provide a cap assembly that can improve the processability by excellent yield rate even at high welding strength.
- the present invention provides a lithium secondary battery that exhibits improved safety by blocking a leakage path through which gas or electrolyte is leaked to the outside.
- the present invention can provide a cap assembly designed as follows according to one non-limiting embodiment in order to improve the processability by exhibiting an excellent yield rate even at high welding strength.
- a current interrupting member including a first coupling part, a first outer peripheral part extending from the first coupling part, and a first gas discharge part formed in the first outer peripheral part; And a second coupling portion including one ridge coupled to the first coupling portion and a ridge portion protruded in an opposite direction of one surface, a second outer circumference portion extending from the second coupling portion, and the second outer circumference portion.
- a safety vent including a second gas outlet formed in the first vent; It may include.
- the maximum thickness of the second coupling portion may be 1.5 times or more based on the minimum thickness of the first coupling portion of the current blocking member. Specifically, it may be in the range of 2 to 5 times based on the minimum thickness of the first coupling portion of the current blocking member.
- the maximum thickness of the second coupling portion may include the thickness of the ridge. The thicker the ridge, and the thinner the minimum thickness of the first coupling portion of the current interruption member, the more advantageous it is to block the leakage path of the gas or electrolyte from the external environment. As a result, yield and fairness can be improved.
- the second coupling portion may include a non-ridged portion, and in this case, the average thickness of the non-ridged portion may be 1 times or less of the minimum thickness of the first coupling portion.
- the first coupling portion may include a protrusion or bent portion that protrudes or bends in one direction of the second coupling portion with respect to the first outer peripheral portion.
- the minimum thickness of the first coupling portion may be the thickness of the protrusion or the bent portion.
- the combination of the current interrupting member and the safety vent may be made by welding, wherein the welding is made in the direction of the safety vent in the current interrupting member, wherein the first
- the coupling between the coupling portion and the second coupling portion may form a weld portion protruding in the direction of the second coupling portion from the first coupling portion on the cross section of the ridge.
- Welding of the first coupling portion and the second coupling portion may be specifically performed by ultrasonic welding, laser welding, resistance welding, arc welding, or the like, or two or more selected from them. Leakage paths of the electrolyte or gas due to welding of the first and second coupling portions are formed only in the ridges.
- the welded portion has a peak shape and the highest peak penetrates the raised portion, as in the prior art, a crack between the weld surface and the base metal is directly connected to the external environment so that a gas or an electrolyte may leak, and thus the raised portion may be leaked.
- the thicker the thickness, and the thinner the minimum thickness of the first coupling portion of the current interruption member can have an advantageous effect in blocking the leakage path of the gas or electrolyte.
- the height of the weld portion may be in the range of the maximum thickness of the second coupling portion.
- the diameter of the welded portion may be in the range of the area or the diameter of the lower surface of the raised portion.
- the minimum thickness of the first coupling portion of the current blocking member may be in the range of 0.6 times to 0.7 times the minimum thickness of the first coupling portion of the conventional current blocking member.
- the maximum thickness of the second coupling portion may be at least twice the maximum thickness of the second coupling portion of the conventional safety vent without ridges.
- the maximum thickness of the second engagement portion of the conventional safety vent without a ridge may be equal to the thickness of the non-ridge.
- the minimum thickness of the first coupling portion of the conventional current blocking member when the minimum thickness of the first coupling portion of the conventional current blocking member is 0.5 millimeter (mm), the minimum thickness of the first coupling portion of the current blocking member according to the non-limiting embodiment of the present invention may be 0.3 millimeters. .
- the maximum thickness of the second coupling portion of the conventional safety vent when the maximum thickness of the second coupling portion of the conventional safety vent is 0.3 millimeters, the maximum thickness of the second coupling portion according to a non-limiting embodiment of the present invention may be 0.7 millimeters.
- the area of the bottom surface of the ridge may be one or more times larger than the area of the surface of the first coupling portion facing the one surface. That is, the area of the lower surface of the ridge may be at least equal to or larger than the area of the facing surface of the first engaging portion.
- the cross-sectional shape of the ridge may be a quadrangle that can completely cover the first coupling portion at a uniform height.
- the area of one side and the other side of the second coupling part may be larger than the area of the face of the first coupling part facing the one surface.
- the cap assembly may further include a gasket for a current blocking member, wherein the gasket for the current blocking member is formed on a third coupling portion and the third coupling portion mounted to a first outer circumference of the current blocking member. It may include a third gas discharge portion in communication with the first and second gas discharge portion.
- the second outer circumference portion may include a partition wall portion bent around the second coupling portion and an outer portion bent around the partition wall portion.
- the second gas discharge part may include a first groove part of the bent portion of the second coupling part and the partition wall part and a second groove part formed at the bent part of the partition wall part and the outer part.
- the first gas outlet and the third gas outlet may be through holes penetrating the first outer circumference and the third coupling, respectively.
- the cap assembly may include a laminated structure of a current blocking member, a gasket for the current blocking member, a safety vent, a PTC element, and a top cap in which one or more gas outlets are formed, and a gasket is added to an outer circumferential surface of the laminated structure. It may be mounted as.
- the present invention uses the electrochemical cell and the electrochemical cell, wherein the cap assembly is mounted on an open side of the battery case in which the electrode stack and the electrolyte are embedded.
- a device can be provided.
- the electrode laminate may include a laminate structure including an anode, a cathode, and a separator, and a separator interposed between the anode and the cathode.
- FIG. 1 is a vertical cross-sectional perspective view of a general cylindrical secondary battery
- FIG. 2 is a vertical sectional view of a typical cap assembly
- FIG. 3 is a schematic cross-sectional view of a cylindrical secondary battery according to one non-limiting embodiment of the present invention.
- FIG. 4 is a perspective view of a current blocking member used in the battery of FIG. 3;
- FIG. 5 is a perspective view of a safety vent used in the battery of FIG. 3;
- FIG. 6 is a cross-sectional photograph of a weld of a general safety vent and a current blocking member
- FIG 7 and 8 are cross-sectional photographs of the welding portion of the safety vent and the current blocking member in accordance with one non-limiting embodiment of the present invention.
- FIGS. 4 and 5 are perspective views of safety vents and current blocking members used in the battery of FIG. 3, respectively. It is.
- the battery 100 inserts an electrode assembly 110 into an interior of a can 200, injects an electrolyte solution thereto, and opens a cap assembly on an open top of the can 200. Manufactured by mounting 300).
- the cap assembly 300 has a structure in which the upper cap 310 and the internal pressure drop safety vent 320 are in close contact with the inside of the airtight gasket 400 mounted on the upper beading part 210 of the can 200. consist of.
- the upper cap 310 protrudes upward in the center to serve as a positive electrode terminal by connection with an external circuit, and a through hole 312 through which the compressed gas inside the can 200 can be discharged along the periphery of the protrusion. Many are formed.
- the safety vent 320 is a thin film structure through which a current flows, and the second coupling part 322 is recessed at the center of the safety vent 320 to form an indented second coupling part, and the second coupling part 322 is melted.
- a base 700 is formed, and the second outer circumference portion includes the partition portion 323 and the outer portion 325, and the lower bent portion and the partition portion 323 of the second coupling portion 322 and the partition portion 323.
- two groove portions 324 and 326 having different depths are formed at the upper bent portions of the outer portion and the outer portion 325.
- the first groove 324 formed in the upper portion of the grooves 324 and 326 forms a closed curve
- the second groove portion 326 formed in the lower portion has an open curve on one side thereof. It is.
- a current blocking member 600 for blocking current while releasing gas inside the battery is installed under the safety vent 320.
- the current blocking member 600 is provided with a gasket 800 for the current blocking member as a member of the conductive plate.
- the current blocking member 600 includes a plurality of through holes 610 through which the gas is discharged along the side surfaces of the first coupling part 601 having the upwardly projecting part 620 formed therein. Consisting of the first outer peripheral portion 602 is formed, three through holes 630 concentrically around the protrusion 620 and three bridges 640 connecting the through holes 630 symmetrically. Formed.
- the notch 650 is formed in the bridge 640, and when the pressurized gas is applied to the safety vent 320 due to a pressure increase in the battery, the second engagement portion 322 is lifted up to lift the second coupling.
- the protrusion 620 coupled with the portion 322 is separated from the main body of the current blocking member 600 while the notch 650 is cut out.
- the upper surface of the protrusion 620 and the lower surface of the indented central portion 322 of the safety vent 320 are coupled by a welding method or the like. At this time, a gap may occur between the welding surface and the base material, and this may cause moisture to penetrate or leak the electrolyte. Therefore, in order to prevent this, the ridge 700 is formed on the upper surface of the indented central portion 322 of the safety vent 320.
- the leakage path due to the gap between the welding surface and the base metal due to the welding is formed only in the ridge 700, the leakage path and the contact with the outside are blocked to fundamentally block leakage, and the amount of gas is not enough to cause the CID short circuit. It is possible to significantly improve the safety of the battery by preventing the thermal runaway phenomenon to occur late.
- a leak path between the welding surface and the base metal is connected to the outside, but as shown in FIG. 7, one of the present inventions is used. According to the embodiment, it can be seen that the leakage path is formed in the ridge 700 is blocked from the external environment.
- the minimum thickness (A) of the protrusion of the first coupling portion and the maximum thickness (B) of the second coupling portion are designed as follows to manufacture a cap assembly according to a non-limiting embodiment of the present invention. It was.
- the maximum thickness of the second coupling portion is thicker than the minimum thickness of the first coupling portion, so that in the welding process of the first coupling portion and the second coupling portion, a leakage path such as gas or electrolyte is formed only in the second coupling portion. In spite of the high welding strength, the yield is excellent, thereby improving the processability and safety.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
제 1 결합부최소두께(A)(mm) | 제 2 결합부최소두께(B)(mm) | 용접강도(kgf) | 용접부의높이(C)(mm) | 용접부의지름(D)(mm) | |
1 | 0.302 | 0.601 | 4.70 | 0.375 | 0.649 |
2 | 0.301 | 0.598 | 5.98 | 0.375 | 0.842 |
3 | 0.304 | 0.598 | 5.65 | 0.383 | 0.810 |
4 | 0.298 | 0.596 | 5.97 | 0.387 | 0.754 |
5 | 0.302 | 0.602 | 4.32 | 0.384 | 0.794 |
6 | 0.304 | 0.603 | 6.66 | 0.379 | 0.712 |
7 | 0.298 | 0.597 | 4.16 | 0.257 | 0.736 |
8 | 0.306 | 0.600 | 6.07 | 0.379 | 0.687 |
9 | 0.299 | 0.601 | 6.21 | 0.338 | 0.675 |
10 | 0.302 | 0.599 | 5.05 | 0.308 | 0.721 |
Average | 0.302 | 0.600 | 5.48 | 0.357 | 0.738 |
Max | 0.298 | 0.596 | 4.16 | 0.257 | 0.649 |
Min | 0.306 | 0.603 | 6.66 | 0.387 | 0.842 |
Claims (20)
- 전지 케이스의 개방 일면에 장착되어 전지 케이스를 밀폐하는 캡 조립체로서,제 1 결합부, 상기 제 1 결합부로부터 연장 형성되어 있는 제 1 외주부, 및 상기 제 1 외주부에 형성되는 제 1 가스 배출부를 포함하는 전류 차단부재; 및일면은 상기 제 1 결합부와 결합되고, 타면에는 일면의 대향 방향으로 융기되어 있는 융기부를 포함하는 제 2 결합부, 상기 제 2 결합부로부터 연장 형성되어 있는 제 2 외주부, 및 상기 제 2 외주부에 형성되는 제 2 가스 배출부를 포함하는 안전벤트;를 포함하는 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 상기 제 2 결합부의 최대 두께는 전류 차단부재의 제 1 결합부의 최소 두께를 기준으로 1.5배 이상인 것을 특징으로 하는 캡 조립체.
- 제 2 항에 있어서, 상기 제 2 결합부의 최대 두께는 전류 차단부재의 제 1 결합부의 최소 두께를 기준으로 2배 내지 5배의 범위 내인 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 상기 제 1 결합부는 제 1 외주부를 기준으로 제 2 결합부의 일면 방향으로 돌출 또는 절곡되어 있는 돌출부 또는 절곡부를 포함하고 있는 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 상기 제 2 결합부는, 일면과 타면의 면적이 상기 일면과 마주하는 제 1 결합부의 대면의 면적에 비해 큰 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 상기 제 2 결합부는, 비융기부를 포함할 수 있고, 상기 비융기부의 평균 두께는, 제 1 결합부의 최소 두께를 기준으로 1배 이하인 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 제 1 결합부와 제 2 결합부의 결합은 용접에 의해 이루어지는 것을 특징으로 하는 캡 조립체.
- 제 7 항에 있어서, 상기 용접은 초음파 용접, 레이저 용접, 저항 용접 및 아크 용접으로 이루어진 군에서 선택되는 하나 또는 둘 이상인 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 제 1 결합부와 제 2 결합부의 결합에 의해, 단면 상에서, 제 1 결합부에서 제 2 결합부의 융기부 내로 돌출된 용접부가 형성되는 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 융기부의 하면의 면적은, 상기 일면과 마주하는 제 1 결합부의 대면의 면적을 기준으로 1배 이상인 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 전해액 또는 가스의 누설경로가 융기부 내에만 형성되어 외부 환경과 차단되는 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 전류 차단부재용 가스켓(Gasket)을 더 포함하고, 상기 전류 차단부재용 가스켓은 전류 차단부재의 제 1 외주부에 장착되는 제 3 결합부와 상기 제 3 결합부에 형성되고 상기 제 1 및 제 2 가스 배출부와 연통하는 제 3 가스 배출부를 포함하고 있는 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 상기 제 2 외주부는, 상기 제 2 결합부의 둘레에서 절곡되어 있는 격벽부와 상기 격벽부의 둘레에서 절곡되어 있는 외곽부를 포함하고 있는 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 제 2 가스 배출부는, 제 2 결합부와 격벽부의 절곡 부위의 제 1 홈부와 격벽부와 외곽부의 절곡 부위에 형성된 제 2 홈부를 포함하는 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 상기 제 1 가스 배출부는 제 1 외주부를 관통하는 관통 홀(hole)인 것을 특징으로 하는 캡 조립체.
- 제 12 항에 있어서, 상기 제 3 가스 배출부는 제 3 결합부를 관통하는 관통 홀(hole)인 것을 특징으로 하는 캡 조립체.
- 제 1 항에 있어서, 상기 캡 조립체는, 전류 차단부재, 전류 차단부재용 가스켓, 안전벤트, PTC 소자, 및 하나 이상의 가스 배출구가 형성되어 있는 탑 캡의 적층 구조로 이루어져 있고, 상기 적층 구조의 외주면에 가스켓이 추가로 장착되어 있는 것을 특징으로 하는 캡 조립체.
- 제 1 항 내지 제 17 항 중 어느 하나에 따른 캡 조립체가 전극 적층체와 전해질이 내장되어 있는 전지 케이스의 개방 일면에 장착되어 있는 전기화학 셀.
- 제 18 항에 있어서, 상기 전극 적층체는, 양극, 음극 및 분리막을 포함하고, 양극과 음극 사이에 분리막이 개재되어 있는 적층 구조를 포함하는 것을 특징으로 하는 전기화학 셀.
- 제 18 항에 따른 전기화학 셀을 전원으로 사용하는 디바이스.
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CN107415887A (zh) * | 2016-05-24 | 2017-12-01 | 上汽通用五菱汽车股份有限公司 | 一种安全带安装组件 |
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KR102358434B1 (ko) * | 2015-04-17 | 2022-02-04 | 삼성에스디아이 주식회사 | 이차 전지 |
CN109564996B (zh) * | 2016-08-01 | 2022-07-08 | Cps科技控股有限公司 | 棱柱形锂离子电池单元的具有双重螺旋圆盘特征的过充电保护*** |
KR102347978B1 (ko) * | 2017-07-28 | 2022-01-07 | 주식회사 엘지에너지솔루션 | 이차전지 |
KR102479450B1 (ko) * | 2018-03-16 | 2022-12-21 | 주식회사 엘지에너지솔루션 | 이차전지 및 그 이차전지의 제조방법 |
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JP2016534525A (ja) | 2016-11-04 |
CN105531848A (zh) | 2016-04-27 |
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