WO2024128557A1 - Device and method for manufacturing cap assembly of cylindrical secondary battery - Google Patents
Device and method for manufacturing cap assembly of cylindrical secondary battery Download PDFInfo
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- WO2024128557A1 WO2024128557A1 PCT/KR2023/017801 KR2023017801W WO2024128557A1 WO 2024128557 A1 WO2024128557 A1 WO 2024128557A1 KR 2023017801 W KR2023017801 W KR 2023017801W WO 2024128557 A1 WO2024128557 A1 WO 2024128557A1
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- vent
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- secondary battery
- cid filter
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000003466 welding Methods 0.000 claims abstract description 84
- 230000007547 defect Effects 0.000 claims abstract description 17
- 238000009529 body temperature measurement Methods 0.000 claims description 16
- 238000001931 thermography Methods 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 17
- 238000004088 simulation Methods 0.000 description 8
- 238000007689 inspection Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
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- 238000010586 diagram Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000009658 destructive testing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
-
- 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
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- 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 an apparatus and method for manufacturing a cap assembly of a cylindrical secondary battery, and to an apparatus and method for manufacturing a cap assembly of a cylindrical secondary battery that can detect welding defects in real time while welding a vent and a CID filter.
- Conventional secondary batteries are classified according to the shape of the battery case into cylindrical batteries and prismatic batteries in which the electrode assembly is built into a cylindrical or square metal can, and pouch-type batteries in which the electrode assembly is built in a pouch-shaped case of aluminum laminate sheet. do.
- the electrode assembly built into the battery case is a power generating element capable of charging and discharging consisting of a stacked structure of anode/separator/cathode, and is a jelly-roll type wound with a separator between the long sheet-shaped anode and cathode coated with active material. It is classified into a stacked structure in which a plurality of anodes and cathodes of a certain size are sequentially stacked with a separator interposed.
- jelly-roll type electrode assemblies are the most widely manufactured because they are easy to manufacture and have the advantage of high energy density per weight. Jelly-roll type electrode assemblies are usually manufactured as cylindrical secondary batteries.
- the jelly-roll type electrode assembly tends to be deformed as it undergoes repeated expansion and contraction. During this deformation process, stress is concentrated in the center, causing the electrode to penetrate the separator and contact the metal center pin, causing internal damage. A short circuit causes
- the cap assembly of the cylindrical battery includes a vent to rupture when the pressure inside the secondary battery is high and discharge high-pressure gas to the outside, and a device to block the current when the internal pressure of the secondary battery rises.
- Safety elements such as CID (Current Interrupt Device) filter, which is a current blocking element, are provided.
- the CID filter is fixedly installed on the vent by welding, and is configured to break the CID filter from the welded portion when the internal pressure of the secondary battery increases.
- the secondary battery When the internal pressure of the battery increases, the welded part may be separated from the vent along with the CID filter, which may cause the CID filter to not function properly.
- This kind of welding condition inspection can be done by selecting some of the manufactured products as test samples and then considering destructive testing such as torque measurement and cross-section confirmation.
- destructive testing such as torque measurement and cross-section confirmation.
- the problem is that a complete inspection is not possible and the inspection time is too long. there is.
- the cap assembly manufacturing apparatus and manufacturing method for a cylindrical secondary battery according to an embodiment of the present invention aims to solve the following problems in order to solve the above-mentioned problems.
- a cap assembly manufacturing device for cylindrical secondary batteries that can shorten the manufacturing time of cap assemblies for cylindrical secondary batteries and fundamentally prevent the shipment of defective welded products such as weak welding by performing a complete inspection of the welding status between the vent and CID filter in a short time. and providing a manufacturing method.
- An apparatus for manufacturing a cap assembly of a cylindrical secondary battery relates to an apparatus for manufacturing a cap assembly of a cylindrical secondary battery for welding a vent and a CID filter of a cylindrical secondary battery, wherein the vent and the cap assembly are disposed on the vent.
- a fixing unit that secures the CID filter; a laser welding unit disposed above the fixing unit and irradiating a laser for welding the vent and the CID filter; a temperature measuring unit disposed below the fixing unit to measure the temperature of the lower part of the vent; and a control unit that detects welding defects between the vent and the CID filter based on the temperature of the lower part of the vent measured by the temperature measurement unit.
- the temperature measurement unit is preferably a thermal imaging camera or an infrared sensor.
- the control unit includes an input unit that acquires the temperature of the lower part of the vent transmitted from the temperature measurement unit; A comparison unit that compares the obtained temperature of the lower part of the vent with a preset temperature; It is preferable to include a determination unit that determines whether the CID filter is weakly welded based on the comparison result of the comparison unit.
- the determination unit preferably determines that the CID filter is weakly welded to the vent.
- the control unit preferably further includes an output control unit that controls the laser output of the laser welding unit.
- the output control unit preferably increases the laser output of the laser welding unit.
- a method of manufacturing a cap assembly of a cylindrical secondary battery relates to a method of manufacturing a cap assembly of a cylindrical secondary battery for welding a vent and a CID filter of a cylindrical secondary battery, wherein the vent and the cap assembly are disposed on the vent.
- a first step of fixing the CID filter on a fixing unit A second step in which a laser welding unit disposed above the fixing unit irradiates a laser to weld the vent and the CID filter, while a temperature measuring unit disposed below the fixing unit measures the temperature of the lower portion of the vent; and a third step in which the control unit detects welding defects between the vent and the CID filter based on the temperature of the lower part of the vent measured by the temperature measurement unit.
- the third step includes a 3a step in which the control unit obtains the temperature of the lower part of the vent from the temperature measurement unit; A 3b step in which the control unit compares the temperature of the lower part of the vent with a preset temperature; It is preferable that the control unit includes a 3c step of determining whether the CID filter is weakly welded based on the comparison result of the 3b step.
- step 3c is preferably a step in which the control unit determines that the CID filter is weakly welded to the vent.
- the cap assembly manufacturing apparatus and manufacturing method for a cylindrical secondary battery detects in real time the temperature of the lower part of the vent, which is the position opposite to the laser welding position, during laser welding of the vent and CID filter, By being configured to detect welding defects such as weak welding based on the detected temperature, the effect of drastically shortening the inspection time and simultaneously enabling a complete inspection of the welding condition can be expected.
- FIG. 1 is a conceptual diagram briefly showing a cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention.
- Figure 2 is a block diagram showing an example of a control unit in the configuration of the cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention.
- Figures 3 and 4 are images to explain simulation conditions for simulating temperature changes in the upper part of the CID filter and the lower part of the vent during laser welding.
- Figure 5 is an image showing simulation results for the temperature of the CID filter and vent when laser welding is performed at an output of 190 W in a state of full contact between the CID filter and vent.
- Figure 6 is an image showing simulation results for the temperature of the CID filter and vent when laser welding is performed at an output of 190 W in a state of partial contact between the CID filter and the vent.
- Figure 7 is a graph showing simulation results of vent temperature change according to laser output during laser welding.
- Figure 8 is a graph showing simulation results of the temperature change of the CID filter according to laser output during laser welding.
- Figure 9(a) is a graph showing the temperature for each measurement point at the bottom of the vent during laser welding using a thermal imaging camera
- Figure 9(b) is a graph showing torque values for each measurement point after laser welding.
- Figure 10(a) is a graph showing the temperature for each measurement point at the bottom of the vent during laser welding using an infrared temperature sensor
- Figure 10(b) is a graph showing torque values for each measurement point after laser welding.
- Figure 11 is a block diagram showing another implementation of a control unit in the configuration of the cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention.
- Figure 12 is a flow chart showing in time series a method of manufacturing a cap assembly for a cylindrical secondary battery according to an embodiment of the present invention.
- FIG. 13 is a flow chart illustrating the third step of FIG. 12 in detail.
- Figure 14 is a flow chart showing in time series a method of manufacturing a cap assembly for a cylindrical secondary battery according to another embodiment of the present invention.
- FIGS. 1 to 11 a cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11.
- a cap assembly manufacturing apparatus for a cylindrical secondary battery relates to a cap assembly manufacturing apparatus for a cylindrical secondary battery for welding the vent 10 and the CID filter 20 of the cylindrical secondary battery, as shown in FIG. As shown, it is configured to include a fixing unit 100, a laser welding unit 200, a temperature measuring unit 300, and a control unit 400.
- the fixing unit 100 performs the function of fixing the vent 10 and the CID filter 20, which are components of the cap assembly of the secondary battery. As shown in FIG. 1, the CID filter 20 is placed on the upper part of the vent 10. is fixedly placed on the fixing unit 100 in a seated state.
- the laser welding unit 200 is spaced apart from the upper part of the fixing unit 100 and performs the function of irradiating laser for welding the vent 10 and the CID filter.
- This laser welding unit 200 is configured to irradiate a laser with a preset output, and a welding portion is formed along the outer peripheral area of the CID filter 20 laminated and fixed on the upper part of the vent 10 fixed to the fixing unit 100. It is preferable that the irradiation position of the laser is configured to be continuously variable.
- the temperature measuring unit 300 is disposed below the fixing unit 100 and functions to measure the temperature below the vent 10, and is preferably a thermal imaging camera or an infrared sensor.
- the control unit 400 performs a function of detecting welding defects between the vent 10 and the CID filter 20 based on the temperature of the lower part of the vent 10 measured by the temperature measurement unit 300.
- control unit 400 may be configured to include an input unit 410, a comparison unit 420, and a determination unit 430, as specifically shown in FIG. 2.
- the input unit 410 performs a function of acquiring the temperature of the lower part of the vent 10 transmitted from the temperature measurement unit 300, and the comparison unit 420 functions of comparing the obtained temperature of the lower part of the vent with a preset temperature. Perform.
- the determination unit 430 performs the function of determining whether or not the CID filter 20 is weakly welded based on the comparison result of the comparison unit 420. Specifically, as a result of the comparison of the comparison unit 420, the lower part of the vent 10 is determined. If the temperature is lower than the preset temperature, the determination unit 430 determines that the CID filter 20 is weakly welded to the vent 10.
- the CID filter 20 Since the heat generated by the laser irradiated to the upper surface is not properly transmitted to the vent 10 placed below, the temperature of the lower part of the vent 10 is lower than that of the good product, and based on this temperature, welding such as weak welding is performed.
- welding defects such as weak welding occur due to poor welding between the vent 10 and the CID filter 20
- the CID filter 20 Since the heat generated by the laser irradiated to the upper surface is not properly transmitted to the vent 10 placed below, the temperature of the lower part of the vent 10 is lower than that of the good product, and based on this temperature, welding such as weak welding is performed.
- a model in which there is no gap between the vent (10) and the CID filter (20) because the welding of the vent (10) and the CID filter (20) is properly performed is defined as a full contact model, and the welding of the vent (10) and the CID filter (20) is defined as a full contact model.
- both components are separated by about 10 ⁇ m, but a model with a partially contacted area (W) was defined as a partial contact model.
- the diameter of the partially contacted area (W) was set differently based on the laser output of the laser welding unit 200, specifically 0.5mm for 190W, 1.0mm for 210W, and 1.2mm for 230W. set.
- an energy source equivalent to a 190 W laser in the form of a Gaussian beam with a radius of 13 um is applied to the upper surface of the CID filter 20, and the center is rotated parallel to the circumferential direction over time.
- the temperature distribution of the vent (10) and the CID filter (20) in the full contact model and the vent in the partial contact model when the heat source is located at the point (P) are shown in Figures 5 and 6, respectively.
- the temperature of the CID filter 20 to which the laser is applied and the temperature of the vent 10 disposed below the CID filter 20 are confirmed to be almost the same, but in the partial contact model, the temperature of the CID filter 20 to which the laser is applied is confirmed to be almost the same.
- the temperature of the vent 10 is lower than the temperature of the CID filter 20, as shown in FIG. 6.
- Figure 9(a) shows the results of measuring the temperature at the bottom of the vent 10 with a thermal imaging camera in the process of welding the CID filter 20 and the vent 10 of 20 samples each using two different laser outputs.
- 9(b) shows the torque measurement results of samples welded through the process of FIG. 9(a).
- the sample with a relatively high measurement temperature at the bottom of the vent 10 also has a high torque value after welding, and conversely, the sample with a relatively high measurement temperature at the bottom of the vent 10 is relatively high.
- low-temperature samples were confirmed to have low torque values after welding, it was confirmed that there was a correlation between the measured temperature at the bottom of the vent 10 and the torque value.
- Figure 10(a) shows the results of measuring the temperature at the bottom of the vent 10 with an infrared temperature sensor during the process of welding the CID filter 20 and the vent 10 of 10 samples each using three different laser outputs.
- 10(b) shows the torque measurement results of samples welded through the process of FIG. 10(a).
- the sample with a relatively high measurement temperature at the bottom of the vent 10 also has a high torque value after welding, and conversely, the torque value at the bottom of the vent 10 is also high.
- the sample with a relatively low measurement temperature was confirmed to have a low torque value after welding, it was confirmed that the measurement temperature and torque value of the lower part of the vent 10 were correlated.
- the measurement range can be formed relatively stably, and furthermore, it is desirable to apply an infrared sensor with a relatively fast measurement speed as the temperature measurement unit 300 to measure the temperature at the bottom of the vent 10, but the thermal imaging camera If better performance can be achieved compared to an infrared sensor due to differences in specifications and measurement methods, a thermal imaging camera may be applied.
- the cap assembly manufacturing apparatus for a cylindrical secondary battery is configured to detect welding defects while welding the CID filter 20 and the vent 10 as described above, and includes a plurality of caps.
- the welding quality between the CID filter 20 and the vent 10 in each cap assembly can be continuously inspected.
- the laser welding unit 400 It can be determined that the problem is caused by the low laser output of 200, and to solve this problem, a method of allowing the control unit 400 to automatically adjust the laser output can be considered.
- control unit 400 may further include an output control unit 440 as shown in FIG. 11, and this output control unit performs the function of controlling the laser output of the laser welding unit 200.
- the output control unit 440 may be configured to increase the laser output of the laser welding unit 200.
- the method for manufacturing a cap assembly of a cylindrical secondary battery includes the first step (S100) of fixing the vent 10 and the CID filter 20, welding and venting (10), as shown in FIG. ) It is configured to include a second step (S200) of measuring the lower temperature and a third step (S300) of detecting welding defects.
- the first step (S100) is a step of fixing the vent 10 and the CID filter 20 disposed on the upper part of the vent 10 on the fixing unit 100
- the second step (S200) is fixing the vent 10 and the CID filter 20 disposed on the upper part of the vent 10.
- the laser welding unit 200 placed at the top irradiates the laser to weld the vent 10 and the CID filter 20, while the temperature measurement unit 300 placed below the fixing unit 100 welds the vent 100.
- the third step (S300) is a step in which the control unit 400 detects welding defects between the vent 10 and the CID filter 20 based on the temperature of the lower part of the vent 10 measured by the temperature measurement unit 300.
- This third step (S300) may be composed of three detailed steps as shown in FIG. 13.
- the 3b step (S320) of comparing the temperature of the lower part of the vent 10 with the preset temperature (T1) is sequentially performed.
- a 3c step (S330) is performed in which the determination unit 430 of the control unit 400 determines whether the CID filter 20 is weakly welded based on the comparison result of the 3b step (S320).
- the 3c step (S330) is performed by the determination unit 430 of the control unit 400. This is the step of determining that the CID filter 20 is weakly welded to the vent 10, and good products and defective products are distinguished through this third c step (S330).
- a method of manufacturing a cap assembly of a cylindrical secondary battery according to another embodiment of the present invention includes the first step (S100) to the third step (S300) of the method of manufacturing a cap assembly of a cylindrical secondary battery according to an embodiment of the present invention described above. All of the above are included, but the fourth step (S400) and the fifth step (S500) are configured to be additionally performed after the third step (S300).
- the control unit 400 determines that the CID filter 20 has not been properly welded to the vent 10 by the determination unit 430, that is, a preset number of defects (N). This is the step to determine whether it occurs continuously in excess of .
- the fifth step (S500) is performed.
- the fifth step (S500) is specifically performed by the control unit 400. It may be defined as a step in which the output control unit 440 increases the laser output of the laser welding unit 200.
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Abstract
The present invention relates to a device and a method for manufacturing a cap assembly of a cylindrical secondary battery, the device and the method being capable of detecting welding defects in real time while welding a vent and a CID filter.
Description
본 발명은 원통형 이차전지의 캡 어셈블리 제조장치 및 제조방법에 관한 것으로, 벤트 및 CID 필터의 용접과 동시에 용접 불량을 실시간으로 검출할 수 있는 원통형 이차전지의 캡 어셈블리 제조장치 및 제조방법에 관한 것이다. The present invention relates to an apparatus and method for manufacturing a cap assembly of a cylindrical secondary battery, and to an apparatus and method for manufacturing a cap assembly of a cylindrical secondary battery that can detect welding defects in real time while welding a vent and a CID filter.
종래 이차전지는 전지케이스의 형상에 따라, 전극조립체가 원통형 또는 각형의 금속 캔에 내장되어 있는 원통형 전지 및 각형 전지와, 전극조립체가 알루미늄 라미네이트 시트의 파우치형 케이스에 내장되어 있는 파우치형 전지로 분류된다.Conventional secondary batteries are classified according to the shape of the battery case into cylindrical batteries and prismatic batteries in which the electrode assembly is built into a cylindrical or square metal can, and pouch-type batteries in which the electrode assembly is built in a pouch-shaped case of aluminum laminate sheet. do.
또한, 전지케이스에 내장되는 상기 전극조립체는 양극/분리막/음극의 적층 구조로 이루어진 충방전이 가능한 발전소자로서, 활물질이 도포된 긴 시트형의 양극과 음극 사이에 분리막을 개재하여 권취한 젤리-롤형 구조와, 소정 크기의 다수의 양극과 음극을 분리막이 개재된 상태에서 순차적으로 적층한 스택형 구조로 분류된다. In addition, the electrode assembly built into the battery case is a power generating element capable of charging and discharging consisting of a stacked structure of anode/separator/cathode, and is a jelly-roll type wound with a separator between the long sheet-shaped anode and cathode coated with active material. It is classified into a stacked structure in which a plurality of anodes and cathodes of a certain size are sequentially stacked with a separator interposed.
그 중 젤리-롤형 전극조립체는 제조가 용이하고 중량당 에너지 밀도가 높은 장점을 가지고 있어 가장 널리 제작되고 있으며, 젤리-롤형 전극조립체는 통상적으로 원통형 이차전지로 제작된다.Among them, jelly-roll type electrode assemblies are the most widely manufactured because they are easy to manufacture and have the advantage of high energy density per weight. Jelly-roll type electrode assemblies are usually manufactured as cylindrical secondary batteries.
그런데, 이차전지의 충방전시 젤리-롤형 전극조립체는 반복적인 팽창과 수축을 겪으면서 변형되는 경향이 있으며, 이러한 변형 과정에서 응력이 중심부로 집중되어 전극이 분리막을 뚫고 금속 센터 핀에 접촉됨으로써 내부 단락이 유발한다.However, during charging and discharging of a secondary battery, the jelly-roll type electrode assembly tends to be deformed as it undergoes repeated expansion and contraction. During this deformation process, stress is concentrated in the center, causing the electrode to penetrate the separator and contact the metal center pin, causing internal damage. A short circuit causes
상기 내부 단락으로 인한 발열에 의해 유기 용매가 분해되어 가스가 발생하고, 이차전지 내의 가스압 상승에 의해 전지가 파열될 수 있으며, 이러한 이차전지 내부의 가스압 상승은 외부 충격에 의해 내부 단락이 발생하였을 때에도 일어날 수 있다.Due to the heat generated by the internal short circuit, the organic solvent is decomposed and gas is generated, and the battery may rupture due to an increase in gas pressure within the secondary battery. This increase in gas pressure inside the secondary battery occurs even when an internal short circuit occurs due to an external shock. It can happen.
상기와 같은 이차전지의 안전성 문제를 해결하기 위하여, 원통형 전지의 캡 어셈블리에는 이차전지 내부의 압력이 높을 경우 파단되어 고압가스를 외부로 배출하기 위한 벤트와, 이차전지 내압의 상승시 전류를 차단하는 전류차단소자인 CID(Current Interrupt Device) 필터 등의 안전 소자들이 구비되어 있다.In order to solve the safety problems of secondary batteries as described above, the cap assembly of the cylindrical battery includes a vent to rupture when the pressure inside the secondary battery is high and discharge high-pressure gas to the outside, and a device to block the current when the internal pressure of the secondary battery rises. Safety elements such as CID (Current Interrupt Device) filter, which is a current blocking element, are provided.
한편, CID 필터는 벤트와 용접에 의하여 벤트 상에 고정 설치되며, 이차전지 내압 상승시 CID 필터가 용접부로부터 파단되도록 구성되는데, 이때 용접에 의한 용접부가 충분히 형성되지 않을 경우인 약용접 상황에서는, 이차전지 내압 상승시 용접부가 CID 필터와 함께 벤트로부터 탈락될 수 있으며, 이로 인하여 CID 필터가 제 기능을 발휘할 수 없게 된다.Meanwhile, the CID filter is fixedly installed on the vent by welding, and is configured to break the CID filter from the welded portion when the internal pressure of the secondary battery increases. In this case, in a weak welding situation where the welded portion is not sufficiently formed by welding, the secondary battery When the internal pressure of the battery increases, the welded part may be separated from the vent along with the CID filter, which may cause the CID filter to not function properly.
따라서 원통형 이차전지의 캡 어셈블리를 제조하는 과정에서 CID 필터와 벤트 간의 용접상태의 검사가 필요하다.Therefore, in the process of manufacturing the cap assembly of a cylindrical secondary battery, it is necessary to inspect the welding condition between the CID filter and the vent.
이러한 용접상태의 검사는 제조가 완료된 제품들 중 일부를 시험용 시료로 선별한 후 토크 측정, 단면 확인 등의 파괴검사를 고려해 볼 수 있으나, 전수검사가 불가하다는 점 및 검사시간이 너무 길다는 문제점이 있다.This kind of welding condition inspection can be done by selecting some of the manufactured products as test samples and then considering destructive testing such as torque measurement and cross-section confirmation. However, the problem is that a complete inspection is not possible and the inspection time is too long. there is.
본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치 및 제조방법은 상술한 문제점을 해결하기 위하여 다음과 같은 해결과제를 목적으로 한다.The cap assembly manufacturing apparatus and manufacturing method for a cylindrical secondary battery according to an embodiment of the present invention aims to solve the following problems in order to solve the above-mentioned problems.
벤트와 CID 필터 간의 용접상태의 전수검사를 빠른 시간 내에 진행함으로써 원통형 이차전지의 캡 어셈블리 제조시간을 단축하고 약용접 등의 용접불량제품의 출하를 원천적으로 차단할 수 있는 원통형 이차전지의 캡 어셈블리 제조장치 및 제조방법을 제공하는 것이다. A cap assembly manufacturing device for cylindrical secondary batteries that can shorten the manufacturing time of cap assemblies for cylindrical secondary batteries and fundamentally prevent the shipment of defective welded products such as weak welding by performing a complete inspection of the welding status between the vent and CID filter in a short time. and providing a manufacturing method.
본 발명의 해결과제는 이상에서 언급된 것들에 한정되지 않으며, 언급되지 아니한 다른 해결과제들은 아래의 기재로부터 당해 기술분야에 있어서의 통상의 지식을 가진 자에게 명확하게 이해되어질 수 있을 것이다.The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.
본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치는, 원통형 이차전지의 벤트 및 CID 필터를 용접하기 위한 원통형 이차전지의 캡 어셈블리 제조장치에 관한 것으로, 상기 벤트 및 상기 벤트 상부에 배치된 CID 필터를 고정하는 고정유닛; 상기 고정유닛 상부에 배치되어 상기 벤트 및 상기 CID 필터를 용접하기 위한 레이저를 조사하는 레이저 용접유닛; 상기 고정유닛 하부에 배치되어 상기 벤트 하부의 온도를 측정하는 온도측정유닛; 및 상기 온도측정유닛에서 측정한 상기 벤트 하부의 온도에 기초하여 상기 벤트 및 CID 필터 간의 용접불량을 검출하는 제어유닛;을 포함한다.An apparatus for manufacturing a cap assembly of a cylindrical secondary battery according to an embodiment of the present invention relates to an apparatus for manufacturing a cap assembly of a cylindrical secondary battery for welding a vent and a CID filter of a cylindrical secondary battery, wherein the vent and the cap assembly are disposed on the vent. A fixing unit that secures the CID filter; a laser welding unit disposed above the fixing unit and irradiating a laser for welding the vent and the CID filter; a temperature measuring unit disposed below the fixing unit to measure the temperature of the lower part of the vent; and a control unit that detects welding defects between the vent and the CID filter based on the temperature of the lower part of the vent measured by the temperature measurement unit.
상기 온도측정유닛은, 열화상 카메라 또는 적외선 센서인 것이 바람직하다.The temperature measurement unit is preferably a thermal imaging camera or an infrared sensor.
상기 제어유닛은, 상기 온도측정유닛으로부터 전달된 상기 벤트 하부의 온도를 획득하는 입력부; 획득한 상기 벤트 하부의 온도를 미리 설정된 온도와 비교하는 비교부; 상기 비교부의 비교결과에 기초하여 상기 CID 필터의 약용접 여부를 판단하는 판단부;를 포함하는 것이 바람직하다.The control unit includes an input unit that acquires the temperature of the lower part of the vent transmitted from the temperature measurement unit; A comparison unit that compares the obtained temperature of the lower part of the vent with a preset temperature; It is preferable to include a determination unit that determines whether the CID filter is weakly welded based on the comparison result of the comparison unit.
상기 비교부의 비교 결과 상기 벤트 하부의 온도가 미리 설정된 온도보다 낮을 경우, 상기 판단부는 상기 CID 필터가 상기 벤트에 약용접된 것으로 판단하는 것이 바람직하다.If the temperature of the lower part of the vent is lower than a preset temperature as a result of the comparison by the comparison unit, the determination unit preferably determines that the CID filter is weakly welded to the vent.
상기 제어유닛은, 상기 레이저 용접유닛의 레이저 출력을 제어하는 출력제어부;를 더 포함하는 것이 바람직하다.The control unit preferably further includes an output control unit that controls the laser output of the laser welding unit.
상기 판단부에 의하여 CID 필터 및 상기 벤트 간의 용접상태가 약용접 상태인 것으로 판단한 결과가 미리 설정된 횟수 이상으로 연속적으로 발생할 경우, 상기 출력제어부는 상기 레이저 용접유닛의 레이저 출력을 높이는 것이 바람직하다.When the determination unit determines that the welding state between the CID filter and the vent is a weak welding state occurs continuously more than a preset number of times, the output control unit preferably increases the laser output of the laser welding unit.
본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조방법은, 원통형 이차전지의 벤트 및 CID 필터를 용접하기 위한 원통형 이차전지의 캡 어셈블리 제조방법에 관한 것으로, 상기 벤트 및 상기 벤트 상부에 배치된 CID 필터를 고정유닛 상에 고정하는 제1 단계; 상기 고정유닛 상부에 배치된 레이저 용접유닛이 레이저를 조사하여 상기 벤트 및 CID 필터를 용접하면서, 상기 고정유닛 하부에 배치된 온도측정유닛이 상기 벤트 하부의 온도를 측정하는 제2 단계; 및 제어유닛이 상기 온도측정유닛이 측정한 상기 벤트 하부의 온도에 기초하여 벤트 및 CID 필터 간의 용접불량을 검출하는 제3 단계;를 포함한다.A method of manufacturing a cap assembly of a cylindrical secondary battery according to an embodiment of the present invention relates to a method of manufacturing a cap assembly of a cylindrical secondary battery for welding a vent and a CID filter of a cylindrical secondary battery, wherein the vent and the cap assembly are disposed on the vent. A first step of fixing the CID filter on a fixing unit; A second step in which a laser welding unit disposed above the fixing unit irradiates a laser to weld the vent and the CID filter, while a temperature measuring unit disposed below the fixing unit measures the temperature of the lower portion of the vent; and a third step in which the control unit detects welding defects between the vent and the CID filter based on the temperature of the lower part of the vent measured by the temperature measurement unit.
상기 제3 단계는, 상기 제어유닛이 상기 온도측정유닛으로부터 상기 벤트 하부의 온도를 획득하는 제3a 단계; 상기 제어유닛이 상기 벤트 하부의 온도를 미리 설정된 온도와 비교하는 제3b 단계; 상기 제어유닛이 상기 제3b 단계의 비교결과에 기초하여 상기 CID 필터의 약용접 여부를 판단하는 제3c 단계;를 포함하는 것이 바람직하다.The third step includes a 3a step in which the control unit obtains the temperature of the lower part of the vent from the temperature measurement unit; A 3b step in which the control unit compares the temperature of the lower part of the vent with a preset temperature; It is preferable that the control unit includes a 3c step of determining whether the CID filter is weakly welded based on the comparison result of the 3b step.
상기 제3b 단계에서 상기 벤트 하부의 온도가 미리 설정된 온도보다 낮은 것으로 확인될 경우, 상기 제3c 단계는 상기 제어유닛이 상기 CID 필터가 상기 벤트에 약용접된 것으로 판단하는 단계인 것이 바람직하다.If it is confirmed in step 3b that the temperature of the lower part of the vent is lower than the preset temperature, step 3c is preferably a step in which the control unit determines that the CID filter is weakly welded to the vent.
본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치 및 제조방법은, 벤트 및 CID 필터의 레이저 용접 진행시 레이저 용접되는 위치와 대향되는 위치인 벤트 하부의 온도를 실시간으로 검출한 후, 검출된 온도에 기초하여 약용접 등의 용접불량을 검출하도록 구성됨으로써, 검사시간을 획기적으로 단축함과 동시에 용접 상태에 대한 전수검사가 가능하다는 효과를 기대할 수 있다. The cap assembly manufacturing apparatus and manufacturing method for a cylindrical secondary battery according to an embodiment of the present invention detects in real time the temperature of the lower part of the vent, which is the position opposite to the laser welding position, during laser welding of the vent and CID filter, By being configured to detect welding defects such as weak welding based on the detected temperature, the effect of drastically shortening the inspection time and simultaneously enabling a complete inspection of the welding condition can be expected.
본 발명의 효과는 이상에서 언급된 것들에 한정되지 않으며, 언급되지 아니한 다른 효과들은 아래의 기재로부터 당해 기술분야에 있어서의 통상의 지식을 가진 자에게 명확하게 이해되어질 수 있을 것이다.The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below.
도 1은 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치를 간략히 도시한 개념도이다.1 is a conceptual diagram briefly showing a cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치의 구성 중 제어유닛의 일 구현예를 도시한 블록도이다. Figure 2 is a block diagram showing an example of a control unit in the configuration of the cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention.
도 3 및 도 4는 레이저 용접 진행시 CID 필터 상부와 벤트 하부의 온도 변화를 시뮬레이션하기 위한 시뮬레이션 조건을 설명하기 위한 이미지이다.Figures 3 and 4 are images to explain simulation conditions for simulating temperature changes in the upper part of the CID filter and the lower part of the vent during laser welding.
도 5는 CID 필터 및 벤트의 완전 접촉 상태에서 190W 출력으로 레이저 용접 진행시 CID 필터 및 벤트의 온도에 대한 시뮬레이션 결과를 도시한 이미지이다.Figure 5 is an image showing simulation results for the temperature of the CID filter and vent when laser welding is performed at an output of 190 W in a state of full contact between the CID filter and vent.
도 6은 CID 필터 및 벤트의 부분 접촉 상태에서 190W 출력으로 레이저 용접 진행시 CID 필터 및 벤트의 온도에 대한 시뮬레이션 결과를 도시한 이미지이다.Figure 6 is an image showing simulation results for the temperature of the CID filter and vent when laser welding is performed at an output of 190 W in a state of partial contact between the CID filter and the vent.
도 7은 레이저 용접 진행시 레이저 출력에 따른 벤트 온도 변화의 시뮬레이션 결과를 도시한 그래프이다.Figure 7 is a graph showing simulation results of vent temperature change according to laser output during laser welding.
도 8은 레이저 용접 진행시 레이저 출력에 따른 CID 필터의 온도 변화의 시뮬레이션 결과를 도시한 그래프이다.Figure 8 is a graph showing simulation results of the temperature change of the CID filter according to laser output during laser welding.
도 9(a)는 열화상 카메라를 이용하여 레이저 용접 진행시 벤트 하부의 측정 포인트 별 온도를 도시한 그래프이고 도 9(b)는 레이저 용접 이후의 상기 측정 포인트 별 토크 값을 도시한 그래프이다.Figure 9(a) is a graph showing the temperature for each measurement point at the bottom of the vent during laser welding using a thermal imaging camera, and Figure 9(b) is a graph showing torque values for each measurement point after laser welding.
도 10(a)는 적외선 온도센서를 이용하여 레이저 용접 진행시 벤트 하부의 측정 포인트 별 온도를 도시한 그래프이고 도 10(b)는 레이저 용접 이후의 상기 측정 포인트 별 토크 값을 도시한 그래프이다.Figure 10(a) is a graph showing the temperature for each measurement point at the bottom of the vent during laser welding using an infrared temperature sensor, and Figure 10(b) is a graph showing torque values for each measurement point after laser welding.
도 11은 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치의 구성 중 제어유닛의 다른 구현예를 도시한 블록도이다. Figure 11 is a block diagram showing another implementation of a control unit in the configuration of the cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention.
도 12는 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조방법을 시계열적으로 도시한 플로우차트이다.Figure 12 is a flow chart showing in time series a method of manufacturing a cap assembly for a cylindrical secondary battery according to an embodiment of the present invention.
도 13은 도 12의 제3 단계를 세분화하여 도시한 플로우차트이다.FIG. 13 is a flow chart illustrating the third step of FIG. 12 in detail.
도 14는 본 발명의 다른 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조방법을 시계열적으로 도시한 플로우차트이다.Figure 14 is a flow chart showing in time series a method of manufacturing a cap assembly for a cylindrical secondary battery according to another embodiment of the present invention.
첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세히 설명하되, 도면 부호에 관계없이 동일하거나 유사한 구성 요소는 동일한 참조 번호를 부여하고 이에 대한 중복되는 설명은 생략하기로 한다. Preferred embodiments according to the present invention will be described in detail with reference to the attached drawings, but identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.
또한, 본 발명을 설명함에 있어서 관련된 공지 기술에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다. 또한, 첨부된 도면은 본 발명의 사상을 쉽게 이해할 수 있도록 하기 위한 것일 뿐, 첨부된 도면에 의해 본 발명의 사상이 제한되는 것으로 해석되어서는 아니 됨을 유의해야 한다.Additionally, when describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted. In addition, it should be noted that the attached drawings are only intended to facilitate easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the attached drawings.
이하 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치에 대하여 도 1 내지 도 11을 참조하여 설명하도록 한다.Hereinafter, a cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11.
본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치는 원통형 이차전지의 벤트(10) 및 CID 필터(20)를 용접하기 위한 원통형 이차전지의 캡 어셈블리 제조장치에 관한 것으로, 도 1에 도시된 바와 같이 고정유닛(100), 레이저 용접유닛(200), 온도측정유닛(300) 및 제어유닛(400)을 포함하도록 구성된다.A cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention relates to a cap assembly manufacturing apparatus for a cylindrical secondary battery for welding the vent 10 and the CID filter 20 of the cylindrical secondary battery, as shown in FIG. As shown, it is configured to include a fixing unit 100, a laser welding unit 200, a temperature measuring unit 300, and a control unit 400.
고정유닛(100)은 이차전지의 캡 어셈블리의 구성품인 벤트(10) 및 CID 필터(20)를 고정하는 기능을 수행하며, 도 1에 도시된 바와 같이 벤트(10) 상부에 CID 필터(20)가 안착된 상태로 고정유닛(100) 상에 고정 배치된다.The fixing unit 100 performs the function of fixing the vent 10 and the CID filter 20, which are components of the cap assembly of the secondary battery. As shown in FIG. 1, the CID filter 20 is placed on the upper part of the vent 10. is fixedly placed on the fixing unit 100 in a seated state.
레이저 용접유닛(200)은 고정유닛(100)의 상부에 이격 배치되어 벤트(10) 및 CID 필터를 용접하기 위한 레이저를 조사하는 기능을 수행한다.The laser welding unit 200 is spaced apart from the upper part of the fixing unit 100 and performs the function of irradiating laser for welding the vent 10 and the CID filter.
이러한 레이저 용접유닛(200)은 미리 설정된 출력으로 레이저를 조사하도록 구성되며, 고정유닛(100)에 고정된 벤트(10) 상부에 적층 고정된 CID 필터(20)의 외주영역을 따라 용접부가 형성될 수 있도록 레이저의 조사위치가 연속적으로 가변될 수 있도록 구성되는 것이 바람직하다.This laser welding unit 200 is configured to irradiate a laser with a preset output, and a welding portion is formed along the outer peripheral area of the CID filter 20 laminated and fixed on the upper part of the vent 10 fixed to the fixing unit 100. It is preferable that the irradiation position of the laser is configured to be continuously variable.
온도측정유닛(300)은 고정유닛(100) 하부에 배치되어 벤트(10) 하부의 온도를 측정하는 기능을 수행하며, 열화상 카메라 또는 적외선 센서인 것이 바람직하다.The temperature measuring unit 300 is disposed below the fixing unit 100 and functions to measure the temperature below the vent 10, and is preferably a thermal imaging camera or an infrared sensor.
제어유닛(400)은 온도측정유닛(300)에서 측정한 벤트(10) 하부의 온도에 기초하여 벤트(10) 및 CID 필터(20) 간의 용접불량을 검출하는 기능을 수행한다.The control unit 400 performs a function of detecting welding defects between the vent 10 and the CID filter 20 based on the temperature of the lower part of the vent 10 measured by the temperature measurement unit 300.
이러한 제어유닛(400)의 일 구현예로는 구체적으로 도 2에 도시된 바와 같이 입력부(410), 비교부(420) 및 판단부(430)를 포함하도록 구성될 수 있다.An implementation example of such a control unit 400 may be configured to include an input unit 410, a comparison unit 420, and a determination unit 430, as specifically shown in FIG. 2.
입력부(410)는 온도측정유닛(300)으로부터 전달된 벤트(10) 하부의 온도를 획득하는 기능을 수행하며, 비교부(420)는 획득한 벤트 하부의 온도를 미리 설정된 온도와 비교하는 기능을 수행한다.The input unit 410 performs a function of acquiring the temperature of the lower part of the vent 10 transmitted from the temperature measurement unit 300, and the comparison unit 420 functions of comparing the obtained temperature of the lower part of the vent with a preset temperature. Perform.
판단부(430)는 비교부(420)의 비교결과에 기초하여 CID 필터(20)의 약용접 여부를 판단하는 기능을 수행하며, 구체적으로 비교부(420)의 비교 결과 벤트(10) 하부의 온도가 미리 설정된 온도보다 낮을 경우 판단부(430)는 CID 필터(20)가 벤트(10)에 약용접된 것으로 판단한다.The determination unit 430 performs the function of determining whether or not the CID filter 20 is weakly welded based on the comparison result of the comparison unit 420. Specifically, as a result of the comparison of the comparison unit 420, the lower part of the vent 10 is determined. If the temperature is lower than the preset temperature, the determination unit 430 determines that the CID filter 20 is weakly welded to the vent 10.
즉, 본 발명의 일 실시예에 따른 원통형 이차전지 캡 어셈블리는, 벤트(10) 및 CID 필터(20) 간에 용접이 제대로 이루어지지 않아서 약용접 등의 용접불량이 발생할 경우, CID 필터(20)의 상면으로 조사되는 레이저에 의하여 발생되는 열이 아래에 배치된 벤트(10)로 제대로 전달되지 않기 때문에 벤트(10)의 하부의 온도가 양품 대비 낮게 형성되며, 이러한 온도에 기초하여 약용접 등의 용접불량을 검출하도록 구성됨으로써, 제조하고 있는 원통형 이차전지 캡 어셈블리를 전수 검사가 가능하며, 나아가 검사로 인하여 소요되는 시간을 크게 단축할 수 있게 된다.That is, in the cylindrical secondary battery cap assembly according to an embodiment of the present invention, when welding defects such as weak welding occur due to poor welding between the vent 10 and the CID filter 20, the CID filter 20 Since the heat generated by the laser irradiated to the upper surface is not properly transmitted to the vent 10 placed below, the temperature of the lower part of the vent 10 is lower than that of the good product, and based on this temperature, welding such as weak welding is performed. By being configured to detect defects, it is possible to inspect all cylindrical secondary battery cap assemblies being manufactured, and furthermore, the time required for inspection can be greatly shortened.
이하에서는 용접 상태에 따른 상술한 벤트(10) 하부의 온도 변화에 대하여 시뮬레이션한 내용을 도 3 내지 도 8을 참조하여 설명하도록 한다. Hereinafter, the simulation of the temperature change in the lower part of the vent 10 according to the welding condition will be described with reference to FIGS. 3 to 8.
시뮬레이션 대상의 경우, 도 3에 도시된 바와 같이 캡 어셈블리 중 벤트(10)와 CID 필터(20)의 용접영역만을 발췌하여 벤트(10) 상부에 CID 필터(20)가 안착되어 있는 원기둥 형상으로 특정하였다.In the case of the simulation target, as shown in FIG. 3, only the welding area of the vent 10 and the CID filter 20 is extracted from the cap assembly and specified as a cylindrical shape with the CID filter 20 seated on the upper part of the vent 10. did.
이때 원기둥의 옆면을 단열 조건이 아닌 symmetry 조건을 부여하여 열전도 효과를 유지하도록 하였으며, 원기둥의 윗면 및 아랫면은 flux 조건을 부여함으로써 외부 공기에 의한 cooling 효과를 적용하였다.At this time, the heat conduction effect was maintained by applying symmetry conditions rather than insulation conditions to the sides of the cylinder, and the cooling effect by external air was applied by applying flux conditions to the top and bottom surfaces of the cylinder.
벤트(10) 및 CID 필터(20)의 용접이 제대로 이루어져서 벤트(10)와 CID 필터(20) 간에 이격이 없는 모델을 완전 접촉 모델로 정의하고, 벤트(10) 및 CID 필터(20)의 용접상태가 약용접 등 불완전한 경우는 도 4에 도시된 바와 같이 양 구성을 10um 정도 이격시키되 부분 접촉되는 영역(W)을 구비하는 모델을 부분 접촉 모델로 정의하였다.A model in which there is no gap between the vent (10) and the CID filter (20) because the welding of the vent (10) and the CID filter (20) is properly performed is defined as a full contact model, and the welding of the vent (10) and the CID filter (20) is defined as a full contact model. In cases where the condition is incomplete, such as weak welding, as shown in FIG. 4, both components are separated by about 10 μm, but a model with a partially contacted area (W) was defined as a partial contact model.
이때 부분 접촉되는 영역(W)의 지름은 레이저 용접유닛(200)의 레이저 출력에 기초하여 다르게 설정하였으며, 구체적으로 190W의 경우는 0.5mm, 210W의 경우는 1.0mm, 230W의 경우는 1.2mm로 설정하였다.At this time, the diameter of the partially contacted area (W) was set differently based on the laser output of the laser welding unit 200, specifically 0.5mm for 190W, 1.0mm for 210W, and 1.2mm for 230W. set.
상기와 같은 시뮬레이션 환경 하에서, CID 필터(20)의 상부면에 반지름이 13 um인 가우시안빔 형태의 190 W의 레이저에 상당하는 에너지원을 인가하고 시간에 따라 중심을 회전축으로 하여 원주 방향과 평행하도록 회전하되 와블(wobble) 방식을 적용하여 1회전 후, 열원이 포인트(P)에 위치하였을 때의 완전 접촉 모델에서의 벤트(10) 및 CID 필터(20)의 온도분포 및 부분 접촉 모델에서의 벤트(10) 및 CID 필터(20)의 온도분포는 각각 도 5 및 도 6과 같다.Under the above simulation environment, an energy source equivalent to a 190 W laser in the form of a Gaussian beam with a radius of 13 um is applied to the upper surface of the CID filter 20, and the center is rotated parallel to the circumferential direction over time. After one rotation by applying the wobble method, the temperature distribution of the vent (10) and the CID filter (20) in the full contact model and the vent in the partial contact model when the heat source is located at the point (P) The temperature distributions of (10) and CID filter (20) are shown in Figures 5 and 6, respectively.
즉, 완전 접촉 모델에서는 도 5에 도시된 바와 같이 레이저가 인가되는 CID 필터(20)의 온도와, CID 필터(20) 하부에 배치된 벤트(10)의 온도가 거의 동일한 것으로 확인되지만, 부분 접촉 모델에서는 도 6에 도시된 바와 같이 벤트(10)의 온도가 CID 필터(20)의 온도보다 낮게 형성되는 것을 확인할 수 있다.That is, in the full contact model, as shown in Figure 5, the temperature of the CID filter 20 to which the laser is applied and the temperature of the vent 10 disposed below the CID filter 20 are confirmed to be almost the same, but in the partial contact model, the temperature of the CID filter 20 to which the laser is applied is confirmed to be almost the same. In the model, it can be confirmed that the temperature of the vent 10 is lower than the temperature of the CID filter 20, as shown in FIG. 6.
한편, CID 필터(20) 상부에 용접을 위한 레이저 조사시, 레이저 출력에 따른 벤트(10) 하부의 온도를 확인해보면, 도 7에 도시된 바와 같이 전체적으로 완전 접촉 모델에 비해 부분 접촉 모델의 벤트(10) 하부 온도가 낮게 형성되는 것을 확인할 수 있다.Meanwhile, when irradiating the laser for welding to the upper part of the CID filter 20, checking the temperature of the lower part of the vent 10 according to the laser output, as shown in FIG. 7, the vent of the partial contact model ( 10) It can be seen that the lower temperature is low.
아울러 레이저 출력에 따른 CID 필터(20) 상면의 온도를 확인해보면, 도 8에 도시된 바와 같이 완전 접촉 모델에 비해 부분 접촉 모델의 CID 필터(20) 상면의 온도가 높게 형성되는 것을 알 수 있는데, 이는 부분 접촉 모델에서의 CID 필터(20)로부터 벤트(10)로의 열전도가 완전 접촉 모델 대비 원활이 이루어지지 않기 때문인 것으로 파악된다.In addition, when checking the temperature of the upper surface of the CID filter 20 according to the laser output, it can be seen that the temperature of the upper surface of the CID filter 20 of the partial contact model is higher than that of the full contact model, as shown in FIG. 8. This is believed to be because heat conduction from the CID filter 20 to the vent 10 in the partial contact model is not as smooth as in the full contact model.
이하에서는 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치에서의 벤트(10) 하부의 온도에 의한 용접불량 검출방식의 정확성 검증을 위하여, 동일 시료에 대한 벤트(10) 하부 온도 측정결과 및 토크 측정결과에 대하여 도 9 및 도 10을 참조하여 설명하도록 한다.Hereinafter, in order to verify the accuracy of the welding defect detection method based on the temperature of the lower part of the vent 10 in the cap assembly manufacturing apparatus for cylindrical secondary batteries according to an embodiment of the present invention, the temperature of the lower part of the vent 10 was measured for the same sample. The results and torque measurement results will be described with reference to FIGS. 9 and 10.
도 9(a)에는 두 개의 다른 레이저 출력을 이용하여 각각 20개 시료의 CID 필터(20) 및 벤트(10)를 용접하는 과정에서 벤트(10) 하부의 온도를 열화상 카메라로 측정한 결과가 도시되어 있으며, 도 9(b)에는 도 9(a)의 과정을 통하여 용접된 시료들의 토크 측정 결과가 도시되어 있다. Figure 9(a) shows the results of measuring the temperature at the bottom of the vent 10 with a thermal imaging camera in the process of welding the CID filter 20 and the vent 10 of 20 samples each using two different laser outputs. 9(b) shows the torque measurement results of samples welded through the process of FIG. 9(a).
도 9(a) 및 도 9(b)를 참조해보면, 벤트(10) 하부의 측정온도가 비교적 높은 시료가 용접 이후의 토크값 또한 높은 것으로 확인되며, 반대로 벤트(10) 하부의 측정온도가 비교적 낮은 시료가 용접 이후의 토크값 또한 낮은 것으로 확인되는 점을 고려해 볼 때, 벤트(10) 하부의 측정온도와 토크값은 상관관계가 있는 것으로 확인된다.Referring to FIGS. 9(a) and 9(b), it is confirmed that the sample with a relatively high measurement temperature at the bottom of the vent 10 also has a high torque value after welding, and conversely, the sample with a relatively high measurement temperature at the bottom of the vent 10 is relatively high. Considering that low-temperature samples were confirmed to have low torque values after welding, it was confirmed that there was a correlation between the measured temperature at the bottom of the vent 10 and the torque value.
다만, 열화상 카메라를 이용하여 벤트(10) 하부의 온도를 측정하는 경우, 도 9(a)에 도시된 바와 같이 동일 출력파워를 이용하여 레이저 용접을 진행시 시료 간의 최대 온도의 편차가 약 117℃로 측정범위가 너무 넓다는 문제점이 있음을 확인할 수 있다.However, when measuring the temperature of the lower part of the vent 10 using a thermal imaging camera, when laser welding is performed using the same output power as shown in FIG. 9(a), the maximum temperature difference between samples is about 117. It can be seen that there is a problem that the measurement range in ℃ is too wide.
도 10(a)에는 세 개의 다른 레이저 출력을 이용하여 각각 10개 시료의 CID 필터(20) 및 벤트(10)를 용접하는 과정에서 벤트(10) 하부의 온도를 적외선 온도센서로 측정한 결과가 도시되어 있으며, 도 10(b)에는 도 10(a)의 과정을 통하여 용접된 시료들의 토크 측정 결과가 도시되어 있다. Figure 10(a) shows the results of measuring the temperature at the bottom of the vent 10 with an infrared temperature sensor during the process of welding the CID filter 20 and the vent 10 of 10 samples each using three different laser outputs. 10(b) shows the torque measurement results of samples welded through the process of FIG. 10(a).
도 10(a) 및 도 10(b)를 참조해보면, 도 9에서와 마찬가지로 벤트(10) 하부의 측정온도가 비교적 높은 시료가 용접 이후의 토크값 또한 높은 것으로 확인되며, 반대로 벤트(10) 하부의 측정온도가 비교적 낮은 시료가 용접 이후의 토크값 또한 낮은 것으로 확인되는 점을 고려해 볼 때, 벤트(10) 하부의 측정온도와 토크값은 상관관계가 있는 것으로 확인된다.Referring to FIGS. 10(a) and 10(b), as in FIG. 9, it is confirmed that the sample with a relatively high measurement temperature at the bottom of the vent 10 also has a high torque value after welding, and conversely, the torque value at the bottom of the vent 10 is also high. Considering that the sample with a relatively low measurement temperature was confirmed to have a low torque value after welding, it was confirmed that the measurement temperature and torque value of the lower part of the vent 10 were correlated.
특히, 적외선 온도센서를 이용하여 벤트(10) 하부의 온도를 측정하는 경우, 도 10(a)에 도시된 바와 같이 동일 출력파워를 이용하여 레이저 용접을 진행시 시료 간의 최대 온도의 편차가 약 47℃로 열화상 카메라 대비 측정범위가 안정적인 것으로 확인된다.In particular, when measuring the temperature of the lower part of the vent 10 using an infrared temperature sensor, as shown in FIG. 10(a), when laser welding is performed using the same output power, the maximum temperature difference between samples is about 47. It is confirmed that the measurement range is stable compared to the thermal imaging camera in ℃.
따라서 측정범위가 비교적 안정적으로 형성될 수 있으며, 나아가 측정 속도 또한 상대적으로 빠른 적외선 센서를 벤트(10) 하부의 온도를 측정하기 위한 온도측정유닛(300)으로 적용하는 것이 바람직하지만, 열화상 카메라의 사양 및 측정방식 등의 차이에 의하여 적외선 센서 대비 더 나은 성능을 구현할 수 있다면 열화상 카메라를 적용할 수도 있을 것이다. Therefore, the measurement range can be formed relatively stably, and furthermore, it is desirable to apply an infrared sensor with a relatively fast measurement speed as the temperature measurement unit 300 to measure the temperature at the bottom of the vent 10, but the thermal imaging camera If better performance can be achieved compared to an infrared sensor due to differences in specifications and measurement methods, a thermal imaging camera may be applied.
한편, 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조장치는 상술한 바와 같이 CID 필터(20)와 벤트(10)를 용접하는 동시에 용접불량을 검출할 수 있도록 구성되는데, 복수 개의 캡 어셈블리가 제조장치에 연속적으로 투입되는 경우, 각 캡 어셈블리에서의 CID 필터(20) 및 벤트(10) 간의 용접품질을 연속적으로 검사할 수 있게 된다.Meanwhile, the cap assembly manufacturing apparatus for a cylindrical secondary battery according to an embodiment of the present invention is configured to detect welding defects while welding the CID filter 20 and the vent 10 as described above, and includes a plurality of caps. When assemblies are continuously input into the manufacturing equipment, the welding quality between the CID filter 20 and the vent 10 in each cap assembly can be continuously inspected.
이러한 과정에서, 제어유닛(400)의 판단부(430)가 연속적으로 투입되는 캡 어셈블리의 CID 필터(20) 및 벤트(10) 간의 용접불량이 미리 설정된 횟수 이상으로 연속적으로 발생할 경우, 레이저 용접유닛(200)의 레이저 출력이 낮아서 발생되는 문제로 판단할 수 있으며, 이를 해결하기 위하여 제어유닛(400)이 자동으로 레이저 출력을 조정할 수 있도록 하는 방안을 고려해 볼 수 있다.In this process, if welding defects between the CID filter 20 and the vent 10 of the cap assembly that are continuously inputted by the determination unit 430 of the control unit 400 continuously occur more than a preset number of times, the laser welding unit It can be determined that the problem is caused by the low laser output of 200, and to solve this problem, a method of allowing the control unit 400 to automatically adjust the laser output can be considered.
이를 위하여 제어유닛(400)은 도 11에 도시된 바와 같이 출력제어부(440)를 더 구비할 수도 있는데, 이러한 출력제어부는, 레이저 용접유닛(200)의 레이저 출력을 제어하는 기능을 수행한다. To this end, the control unit 400 may further include an output control unit 440 as shown in FIG. 11, and this output control unit performs the function of controlling the laser output of the laser welding unit 200.
구체적으로 제어유닛(400)의 판단부(430)에 의하여 CID 필터(20)가 벤트(10)에 용접에 제대로 이루어지지 않았다는 판단결과가 미리 설정된 횟수 이상으로 연속적으로 발생될 경우, 제어유닛(400)의 출력제어부(440)는 레이저 용접유닛(200)의 레이저 출력을 높이도록 구성될 수 있다.Specifically, when the judgment unit 430 of the control unit 400 continuously determines that the CID filter 20 is not properly welded to the vent 10 more than a preset number of times, the control unit 400 ) The output control unit 440 may be configured to increase the laser output of the laser welding unit 200.
이하에서는 도 12 내지 도 13을 참조하여 본 발명의 일 실시예에 따른 원통형 이차전지의 벤트(20) 및 CID 필터(10)를 용접하기 위한 원통형 이차전지의 캡 어셈블리 제조방법에 대하여 설명하되, 앞서 언급한 원통형 이차전지의 캡 어셈블리 제조장치에서 이미 설명한 내용과 중복되는 내용에 대한 설명은 생략하도록 한다. Hereinafter, with reference to FIGS. 12 and 13, a method of manufacturing a cap assembly of a cylindrical secondary battery for welding the vent 20 and the CID filter 10 of the cylindrical secondary battery according to an embodiment of the present invention will be described. Descriptions of content that overlaps with content already described in the cap assembly manufacturing device for the mentioned cylindrical secondary battery will be omitted.
본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조방법은, 도 12에 도시된 바와 같이 벤트(10) 및 CID 필터(20)를 고정하는 제1 단계(S100), 용접 및 벤트(10) 하부 온도를 측정하는 제2 단계(S200) 및 용접불량을 검출하는 제3 단계(S300)를 포함하도록 구성된다.The method for manufacturing a cap assembly of a cylindrical secondary battery according to an embodiment of the present invention includes the first step (S100) of fixing the vent 10 and the CID filter 20, welding and venting (10), as shown in FIG. ) It is configured to include a second step (S200) of measuring the lower temperature and a third step (S300) of detecting welding defects.
구체적으로, 제1 단계(S100)에서는 벤트(10) 및 벤트(10) 상부에 배치된 CID 필터(20)를 고정유닛(100) 상에 고정하는 단계이고, 제2 단계(S200)는 고정유닛(100) 상부에 배치된 레이저 용접유닛(200)이 레이저를 조사하여 벤트(10) 및 CID 필터(20)를 용접하는 동시에, 고정유닛(100) 하부에 배치된 온도측정유닛(300)이 벤트(10) 하부의 온도를 측정하는 단계이다.Specifically, the first step (S100) is a step of fixing the vent 10 and the CID filter 20 disposed on the upper part of the vent 10 on the fixing unit 100, and the second step (S200) is fixing the vent 10 and the CID filter 20 disposed on the upper part of the vent 10. (100) The laser welding unit 200 placed at the top irradiates the laser to weld the vent 10 and the CID filter 20, while the temperature measurement unit 300 placed below the fixing unit 100 welds the vent 100. (10) This is the step of measuring the temperature of the lower part.
제3 단계(S300)는 제어유닛(400)이 온도측정유닛(300)이 측정한 벤트(10) 하부의 온도에 기초하여 벤트(10) 및 CID 필터(20) 간의 용접불량을 검출하는 단계이며, 이러한 제3 단계(S300)는 도 13에 도시된 바와 같이 3개의 세부 단계로 구성될 수 있다.The third step (S300) is a step in which the control unit 400 detects welding defects between the vent 10 and the CID filter 20 based on the temperature of the lower part of the vent 10 measured by the temperature measurement unit 300. , This third step (S300) may be composed of three detailed steps as shown in FIG. 13.
구체적으로, 제어유닛(400)의 입력부(410)가 온도측정유닛(300)으로부터 벤트(10) 하부의 온도를 획득하는 제3a 단계(S310)와, 제어유닛(400)의 비교부(420)가 벤트(10) 하부의 온도를 미리 설정된 온도(T1)과 비교하는 제3b 단계(S320)가 순차적으로 수행된다.Specifically, the 3a step (S310) in which the input unit 410 of the control unit 400 acquires the temperature of the lower part of the vent 10 from the temperature measurement unit 300, and the comparison unit 420 of the control unit 400 The 3b step (S320) of comparing the temperature of the lower part of the vent 10 with the preset temperature (T1) is sequentially performed.
이후 제어유닛(400)의 판단부(430)가 상기 제3b 단계(S320)의 비교결과에 기초하여 CID 필터(20)의 약용접 여부를 판단하는 제3c 단계(S330)가 수행된다.Thereafter, a 3c step (S330) is performed in which the determination unit 430 of the control unit 400 determines whether the CID filter 20 is weakly welded based on the comparison result of the 3b step (S320).
특히 상술한 제3b 단계(S320)에서 벤트(10) 하부의 온도가 미리 설정된 온도(T1)보다 낮은 것으로 확인될 경우, 제3c 단계(S330)는 제어유닛(400)의 판단부(430)가 CID 필터(20)가 벤트(10)에 약용접된 것으로 판단하는 단계로, 이러한 제3c 단계(S330)에 의하여 양품 및 불량이 구분되게 된다.In particular, if the temperature of the lower part of the vent 10 is confirmed to be lower than the preset temperature T1 in the above-described 3b step (S320), the 3c step (S330) is performed by the determination unit 430 of the control unit 400. This is the step of determining that the CID filter 20 is weakly welded to the vent 10, and good products and defective products are distinguished through this third c step (S330).
이하, 도 14를 참조하여 본 발명의 다른 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조방법에 대하여 설명하도록 한다. Hereinafter, a method for manufacturing a cap assembly of a cylindrical secondary battery according to another embodiment of the present invention will be described with reference to FIG. 14.
본 발명의 다른 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조방법은, 앞서 설명한 본 발명의 일 실시예에 따른 원통형 이차전지의 캡 어셈블리 제조방법의 제1 단계(S100) 내지 제3 단계(S300)를 모두 포함하되, 제3 단계(S300) 이후에 제4 단계(S400) 및 제5 단계(S500)가 추가적으로 수행되도록 구성된다. A method of manufacturing a cap assembly of a cylindrical secondary battery according to another embodiment of the present invention includes the first step (S100) to the third step (S300) of the method of manufacturing a cap assembly of a cylindrical secondary battery according to an embodiment of the present invention described above. All of the above are included, but the fourth step (S400) and the fifth step (S500) are configured to be additionally performed after the third step (S300).
제4 단계(S400)는, 제어유닛(400)이 판단부(430)에 의한 CID 필터(20)가 벤트(10)에 용접에 제대로 이루어지지 않았다는 판단결과, 즉 불량이 미리 설정된 횟수(N)를 초과하여 연속적으로 발생하는지 여부를 판단하는 단계이다.In the fourth step (S400), the control unit 400 determines that the CID filter 20 has not been properly welded to the vent 10 by the determination unit 430, that is, a preset number of defects (N). This is the step to determine whether it occurs continuously in excess of .
제4 단계(S400)에서 불량의 연속발생 횟수가 미리 설정된 횟수(N)를 초과하는 것으로 확인되면 제5 단계(S500)가 수행되는데, 제5 단계(S500)는 구체적으로 제어유닛(400)의 출력제어부(440)가 레이저 용접유닛(200)의 레이저 출력을 높이는 단계로 정의될 수 있다. If it is confirmed in the fourth step (S400) that the number of consecutive occurrences of defects exceeds the preset number (N), the fifth step (S500) is performed. The fifth step (S500) is specifically performed by the control unit 400. It may be defined as a step in which the output control unit 440 increases the laser output of the laser welding unit 200.
이상, 본 발명을 바람직한 실시 예를 사용하여 상세히 설명하였으나, 본 발명의 범위는 특정 실시 예에 한정되는 것은 아니며, 첨부된 특허청구범위에 의하여 해석되어야 할 것이다. 또한, 이 기술분야에서 통상의 지식을 습득한 자라면, 본 발명의 범위에서 벗어나지 않으면서도 많은 수정과 변형이 가능함을 이해하여야 할 것이다. Above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to the specific embodiments and should be interpreted in accordance with the appended claims. Additionally, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.
Claims (7)
- 원통형 이차전지의 벤트 및 CID 필터를 용접하기 위한 원통형 이차전지의 캡 어셈블리 제조장치에 있어서,In the cap assembly manufacturing device for a cylindrical secondary battery for welding the vent and CID filter of the cylindrical secondary battery,상기 벤트 및 상기 벤트 상부에 배치된 CID 필터를 고정하는 고정유닛;a fixing unit for fixing the vent and a CID filter disposed on an upper part of the vent;상기 고정유닛 상부에 배치되어 상기 벤트 및 상기 CID 필터를 용접하기 위한 레이저를 조사하는 레이저 용접유닛;a laser welding unit disposed above the fixing unit and irradiating a laser for welding the vent and the CID filter;상기 고정유닛 하부에 배치되어 상기 벤트 하부의 온도를 측정하는 온도측정유닛; 및a temperature measuring unit disposed below the fixing unit to measure the temperature of the lower part of the vent; and상기 온도측정유닛에서 측정한 상기 벤트 하부의 온도에 기초하여 상기 벤트 및 CID 필터 간의 용접불량을 검출하는 제어유닛;a control unit that detects welding defects between the vent and the CID filter based on the temperature of the lower part of the vent measured by the temperature measurement unit;을 포함하는 원통형 이차전지의 캡 어셈블리 제조장치.A cap assembly manufacturing device for a cylindrical secondary battery comprising a.
- 청구항 1에 있어서, In claim 1,상기 온도측정유닛은, 열화상 카메라 또는 적외선 센서인 것을 특징으로 하는 원통형 이차전지의 캡 어셈블리 제조장치.A cap assembly manufacturing device for a cylindrical secondary battery, wherein the temperature measurement unit is a thermal imaging camera or an infrared sensor.
- 청구항 1에 있어서, 상기 제어유닛은,The method of claim 1, wherein the control unit,상기 온도측정유닛으로부터 전달된 상기 벤트 하부의 온도를 획득하는 입력부;an input unit that acquires the temperature of the lower part of the vent transmitted from the temperature measurement unit;획득한 상기 벤트 하부의 온도를 미리 설정된 온도와 비교하는 비교부;A comparison unit that compares the obtained temperature of the lower part of the vent with a preset temperature;상기 비교부의 비교결과에 기초하여 상기 CID 필터의 약용접 여부를 판단하는 판단부;a determination unit that determines whether the CID filter is weakly welded based on the comparison result of the comparison unit;를 포함하는 것을 특징으로 하는 원통형 이차전지의 캡 어셈블리 제조장치.A cap assembly manufacturing device for a cylindrical secondary battery comprising a.
- 청구항 3에 있어서,In claim 3,상기 비교부의 비교 결과 상기 벤트 하부의 온도가 미리 설정된 온도보다 낮을 경우, 상기 판단부는 상기 CID 필터가 상기 벤트에 약용접된 것으로 판단하는 것을 특징으로 하는 원통형 이차전지 캡 어셈블리 제조장치.When the temperature of the lower part of the vent is lower than a preset temperature as a result of the comparison of the comparison unit, the determination unit determines that the CID filter is weakly welded to the vent.
- 원통형 이차전지의 벤트 및 CID 필터를 용접하기 위한 원통형 이차전지의 캡 어셈블리 제조방법에 있어서,In the method of manufacturing a cap assembly of a cylindrical secondary battery for welding the vent and CID filter of the cylindrical secondary battery,상기 벤트 및 상기 벤트 상부에 배치된 CID 필터를 고정유닛 상에 고정하는 제1 단계;A first step of fixing the vent and the CID filter disposed on the vent on a fixing unit;상기 고정유닛 상부에 배치된 레이저 용접유닛이 레이저를 조사하여 상기 벤트 및 CID 필터를 용접하면서, 상기 고정유닛 하부에 배치된 온도측정유닛이 상기 벤트 하부의 온도를 측정하는 제2 단계; 및A second step in which a laser welding unit disposed above the fixing unit irradiates a laser to weld the vent and the CID filter, while a temperature measuring unit disposed below the fixing unit measures the temperature of the lower portion of the vent; and제어유닛이 상기 온도측정유닛이 측정한 상기 벤트 하부의 온도에 기초하여 벤트 및 CID 필터 간의 용접불량을 검출하는 제3 단계;A third step in which a control unit detects welding defects between the vent and the CID filter based on the temperature of the lower part of the vent measured by the temperature measurement unit;를 포함하는 원통형 이차전지의 캡 어셈블리 제조방법.A method of manufacturing a cap assembly of a cylindrical secondary battery comprising a.
- 청구항 5에 있어서, 상기 제3 단계는, The method of claim 5, wherein the third step is,상기 제어유닛이 상기 온도측정유닛으로부터 상기 벤트 하부의 온도를 획득하는 제3a 단계;Step 3a in which the control unit acquires the temperature of the lower part of the vent from the temperature measurement unit;상기 제어유닛이 상기 벤트 하부의 온도를 미리 설정된 온도와 비교하는 제3b 단계;A 3b step in which the control unit compares the temperature of the lower part of the vent with a preset temperature;상기 제어유닛이 상기 제3b 단계의 비교결과에 기초하여 상기 CID 필터의 약용접 여부를 판단하는 제3c 단계;A 3c step in which the control unit determines whether the CID filter is weakly welded based on the comparison result of the 3b step;를 포함하는 것을 특징으로 하는 원통형 이차전지의 캡 어셈블리 제조방법.A method of manufacturing a cap assembly for a cylindrical secondary battery, comprising:
- 청구항 6에 있어서, In claim 6,상기 제3b 단계에서 상기 벤트 하부의 온도가 미리 설정된 온도보다 낮은 것으로 확인될 경우, If it is confirmed that the temperature of the lower part of the vent is lower than the preset temperature in step 3b,상기 제3c 단계는 상기 제어유닛이 상기 CID 필터가 상기 벤트에 약용접된 것으로 판단하는 단계인 것을 특징으로 하는 원통형 이차전지의 캡 어셈블리 제조방법.The 3c step is a method of manufacturing a cap assembly of a cylindrical secondary battery, characterized in that the control unit determines that the CID filter is weakly welded to the vent.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020040450A (en) * | 2000-11-24 | 2002-05-30 | 정현채 | Safety Vent for Battery and The Producing Method Thereof |
JP2004158318A (en) * | 2002-11-07 | 2004-06-03 | Matsushita Electric Ind Co Ltd | Cylindrical battery and its manufacturing method |
JP2012516545A (en) * | 2009-01-30 | 2012-07-19 | ボストン−パワー,インコーポレイテッド | Modular CID assembly for lithium ion batteries |
CN113791367A (en) * | 2021-09-09 | 2021-12-14 | 湖北亿纬动力有限公司 | Method and device for detecting welding effect of battery pole |
US20220258286A1 (en) * | 2021-02-18 | 2022-08-18 | Precitec Gmbh & Co. Kg | Method and laser machining system for analyzing a weld seam formed by a laser welding process |
-
2022
- 2022-12-14 KR KR1020220175330A patent/KR20240092492A/en unknown
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- 2023-11-07 WO PCT/KR2023/017801 patent/WO2024128557A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020040450A (en) * | 2000-11-24 | 2002-05-30 | 정현채 | Safety Vent for Battery and The Producing Method Thereof |
JP2004158318A (en) * | 2002-11-07 | 2004-06-03 | Matsushita Electric Ind Co Ltd | Cylindrical battery and its manufacturing method |
JP2012516545A (en) * | 2009-01-30 | 2012-07-19 | ボストン−パワー,インコーポレイテッド | Modular CID assembly for lithium ion batteries |
US20220258286A1 (en) * | 2021-02-18 | 2022-08-18 | Precitec Gmbh & Co. Kg | Method and laser machining system for analyzing a weld seam formed by a laser welding process |
CN113791367A (en) * | 2021-09-09 | 2021-12-14 | 湖北亿纬动力有限公司 | Method and device for detecting welding effect of battery pole |
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