CN108956026A - Overhead welding air tightness detection system - Google Patents
Overhead welding air tightness detection system Download PDFInfo
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- CN108956026A CN108956026A CN201811084946.5A CN201811084946A CN108956026A CN 108956026 A CN108956026 A CN 108956026A CN 201811084946 A CN201811084946 A CN 201811084946A CN 108956026 A CN108956026 A CN 108956026A
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- 238000003466 welding Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 239000011261 inert gas Substances 0.000 claims abstract description 21
- 238000009423 ventilation Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 37
- 239000007784 solid electrolyte Substances 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000001307 helium Substances 0.000 description 6
- 229910052734 helium Inorganic materials 0.000 description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
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- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
一种储能电池技术领域的顶焊气密性检测系统，包括密封型腔及与之连接的惰性气体气罐；所述密封型腔包括腔体、密封端盖和密封测试口，待测陶瓷管设置在腔体中、与密封测试口同轴设置，密封测试口设置有密封件密封待测陶瓷管，密封端盖压合在腔体上对密封型腔进行密封；所述密封件设有通气轴孔，所述通气轴孔通过第一管路连接有第一真空泵并设有第一阀门，通过第二管路连接有惰性气体检漏仪并设有第二阀门，惰性气体检漏仪连接有第二真空泵；所述第二管路上设有真空计，真空计设置在第二阀门之前。本发明将固体电解质陶瓷管置于密封型腔中进行测试，能够提高气密性检测的可靠性，同时能够对不合格的产品进行补焊，避免因焊接不良导致整个产品报废。A top welding airtightness detection system in the field of energy storage battery technology, comprising a sealed cavity and an inert gas tank connected thereto; the sealed cavity includes a cavity, a sealed end cover and a sealed test port, and the ceramic to be tested The tube is set in the cavity and coaxial with the seal test port, the seal test port is provided with a seal to seal the ceramic tube to be tested, and the seal end cover is pressed on the cavity to seal the seal cavity; the seal is provided with The ventilation shaft hole is connected to the first vacuum pump through the first pipeline and is provided with a first valve, and is connected to an inert gas leak detector through a second pipeline and is provided with a second valve. The inert gas leak detector A second vacuum pump is connected; a vacuum gauge is arranged on the second pipeline, and the vacuum gauge is arranged before the second valve. In the invention, the solid electrolyte ceramic tube is placed in a sealed cavity for testing, which can improve the reliability of air tightness detection, and at the same time repair welding for unqualified products, so as to avoid the scrapping of the whole product due to poor welding.
Description
技术领域technical field
本发明涉及的是一种储能电池领域的技术，具体是一种顶焊气密性检测系统。The invention relates to a technology in the field of energy storage batteries, in particular to a top welding air tightness detection system.
背景技术Background technique
在钠离子电池生产工艺中，固体电解质陶瓷管102需与顶桥103焊接固定(如图3和图4所示)，焊接后密封可靠性直接关系钠离子电池的使用安全性，因而需要在焊接后测试电池的气密性。目前业界的通用检测方法是将焊接后的陶瓷管102放入测试腔体中，再将陶瓷管102上电池注液口处密封，之后采用粗抽真空泵对测试腔体型腔抽高真空，保证一定时间不泄漏再对陶瓷管空腔充氦气，再通过氦检仪对精抽真空泵抽取的测试型腔腔体中的气体进行分析，来判定陶瓷管空腔气密性确定焊接是否合格，上述方法存在密封性不可靠的缺陷，容易误判电池的气密性，准确率低。In the production process of sodium-ion batteries, the solid electrolyte ceramic tube 102 needs to be welded and fixed with the top bridge 103 (as shown in Figure 3 and Figure 4). Then test the airtightness of the battery. At present, the common detection method in the industry is to put the welded ceramic tube 102 into the test chamber, then seal the battery liquid injection port on the ceramic tube 102, and then use a rough vacuum pump to evacuate the test chamber cavity to ensure a certain Fill the cavity of the ceramic tube with helium if the time does not leak, and then use a helium detector to analyze the gas in the cavity of the test cavity extracted by the fine vacuum pump to determine the airtightness of the cavity of the ceramic tube and determine whether the welding is qualified. The method has the defect of unreliable airtightness, it is easy to misjudge the airtightness of the battery, and the accuracy rate is low.
发明内容Contents of the invention
本发明针对现有技术存在的上述不足，提出了一种顶焊气密性检测系统，将固体电解质陶瓷管置于密封型腔中，将氦检仪与陶瓷管空腔连通，在密封型腔内注入氦气进行检测，能够提高气密性检测的可靠性，同时能够对不合格的产品进行补焊，避免因焊接不良导致整个产品报废。Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a top welding air-tightness detection system. The solid electrolyte ceramic tube is placed in the sealed cavity, and the helium detector is connected with the cavity of the ceramic tube. Injecting helium gas for detection can improve the reliability of air tightness detection, and at the same time repair welding for unqualified products to avoid the scrapping of the entire product due to poor welding.
本发明是通过以下技术方案实现的：The present invention is achieved through the following technical solutions:
本发明包括密封型腔及与密封型腔连接的惰性气体气罐；The invention comprises a sealed cavity and an inert gas tank connected with the sealed cavity;
所述密封型腔包括腔体、密封端盖和密封测试口，待测陶瓷管设置在腔体中、与密封测试口同轴设置，密封测试口设置有密封件密封待测陶瓷管上顶焊区域，密封端盖压合在腔体上对密封型腔进行密封；The sealed cavity includes a cavity body, a sealed end cover and a sealed test port. The ceramic tube to be tested is arranged in the cavity coaxially with the sealed test port, and the sealed test port is provided with a seal to seal the top welding area, the sealing end cover is pressed on the cavity to seal the sealing cavity;
所述密封件设有通气轴孔，所述通气轴孔与待测陶瓷管连通，所述通气轴孔通过第一管路连接有第一真空泵并设有第一阀门，通过第二管路连接有惰性气体检漏仪并设有第二阀门，惰性气体检漏仪连接有第二真空泵；所述第二管路上设有真空计，真空计设置在第二阀门之前。The seal is provided with a ventilation shaft hole, and the ventilation shaft hole is connected with the ceramic tube to be tested. The ventilation shaft hole is connected with a first vacuum pump through a first pipeline and is provided with a first valve, and is connected with a second pipeline through a first vacuum pump. There is an inert gas leak detector and a second valve, and the inert gas leak detector is connected to a second vacuum pump; a vacuum gauge is arranged on the second pipeline, and the vacuum gauge is arranged before the second valve.
所述密封件包括底部设有封堵头的封堵推杆和套设在封堵推杆上的密封套筒，通气轴孔贯通封堵头和封堵推杆，封堵头压于陶瓷管顶焊部位使得通气轴孔与陶瓷管空腔连通并且对顶焊区域进行密封；所述封堵推杆和密封套筒之间设有不少于一重密封圈，保证测试气密性；优选地，设有三重密封圈，避免设置单一密封圈在封堵推杆推拉过程中气密性可能遭到破坏的情况发生。The seal includes a plugging push rod with a plugging head at the bottom and a sealing sleeve sleeved on the plugging rod. The top welding part makes the ventilation shaft hole communicate with the cavity of the ceramic tube and seals the top welding area; there is no less than one sealing ring between the plugging push rod and the sealing sleeve to ensure the airtightness of the test; preferably , with triple sealing rings, avoiding the situation that the airtightness of a single sealing ring may be damaged during the push-pull process of the plugging push rod.
所述密封端盖设置在导杆上并连接有直线推杆，待测陶瓷管通过连接件与密封端盖固定连接；所述密封端盖经直线推杆与腔体压合。The sealing end cover is arranged on the guide rod and is connected with a linear push rod, and the ceramic tube to be tested is fixedly connected with the sealing end cover through a connecting piece; the sealing end cover is pressed into the cavity through the linear push rod.
所述顶焊气密性检测系统设有不少于一个密封型腔。The top welding air tightness detection system is provided with not less than one sealed cavity.
优选地，所述顶焊气密性检测系统设有两个密封型腔，通过设置管路阀门控制两个密封型腔中顶焊气密性检测交替进行。Preferably, the top welding air tightness testing system is provided with two sealed cavities, and the top welding air tightness testing in the two sealed cavities is controlled alternately by setting a pipeline valve.
所述密封型腔通过管路与消声器相连并设有阀门。The sealed cavity is connected with the muffler through a pipeline and is provided with a valve.
技术效果technical effect
与现有技术相比，本发明将固体电解质陶瓷管置于密封型腔中，将氦检仪与陶瓷管空腔连通，在密封型腔内注入氦气进行检测，能够提高气密性检测的可靠性，同时能够对不合格的产品进行补焊，避免因焊接不良导致整个产品报废。Compared with the prior art, the present invention puts the solid electrolyte ceramic tube in the sealed cavity, connects the helium detector with the cavity of the ceramic tube, and injects helium gas into the sealed cavity for detection, which can improve the efficiency of air tightness detection. Reliability, at the same time, it can repair the unqualified products to avoid the scrapping of the whole product due to poor welding.
附图说明Description of drawings
图1为实施例1系统结构示意图；Fig. 1 is the schematic structural diagram of embodiment 1 system;
图2为实施例1中密封件半剖结构示意图；Fig. 2 is a schematic diagram of the half-section structure of the seal in embodiment 1;
图3为顶焊工艺图；Figure 3 is a top welding process diagram;
图4为图3中顶焊区域结构示意图；Fig. 4 is a schematic diagram of the structure of the top welding area in Fig. 3;
图中：第一密封型腔1、第二密封型腔2、第一真空泵3、第二真空泵4、真空计5、惰性气体检漏仪6、惰性气体气罐7、第一阀门8、第二阀门9、第三阀门10、第四阀门11、消声器12、第五阀门13、第六阀门14、密封件101、陶瓷管102、顶桥103、腔体104、密封端盖105、导杆106、直线推杆107、密封套筒1011、封堵推杆1012、密封圈1013、封堵头1014、通气轴孔1015。In the figure: the first sealed cavity 1, the second sealed cavity 2, the first vacuum pump 3, the second vacuum pump 4, the vacuum gauge 5, the inert gas leak detector 6, the inert gas tank 7, the first valve 8, the second Second valve 9, third valve 10, fourth valve 11, muffler 12, fifth valve 13, sixth valve 14, seal 101, ceramic tube 102, top bridge 103, cavity 104, sealing end cover 105, guide rod 106. Linear push rod 107, sealing sleeve 1011, plugging push rod 1012, sealing ring 1013, plugging head 1014, ventilation shaft hole 1015.
具体实施方式Detailed ways
下面结合附图及具体实施方式对本发明进行详细描述。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
实施例1Example 1
如图1和图2所示，本实施例包括：第一密封型腔1、第二密封型腔2、第一真空泵3、第二真空泵4、真空计5、惰性气体检漏仪6和惰性气体气罐7；As shown in Figures 1 and 2, this embodiment includes: a first sealed cavity 1, a second sealed cavity 2, a first vacuum pump 3, a second vacuum pump 4, a vacuum gauge 5, an inert gas leak detector 6 and an inert Gas tank 7;
所述第一密封型腔1和第二密封型腔2均设有腔体104、密封端盖105和密封测试口，待测陶瓷管102设置在腔体104中、与密封测试口同轴设置，密封测试口设置有密封件101密封待测陶瓷管102上顶焊区域；密封端盖105压合在腔体104上对各密封型腔进行密封，各密封型腔与惰性气体气罐7连接并设有阀门；Both the first sealed cavity 1 and the second sealed cavity 2 are provided with a cavity body 104, a sealing end cover 105 and a sealing test port, and the ceramic tube 102 to be tested is arranged in the cavity body 104 coaxially with the sealing test port , the sealing test port is provided with a seal 101 to seal the top welding area on the ceramic tube 102 to be tested; the sealing end cover 105 is pressed on the cavity 104 to seal each sealing cavity, and each sealing cavity is connected to the inert gas tank 7 and be provided with valves;
所述密封件101设有通气轴孔1015，所述通气轴孔1015与待测陶瓷管102连通，所述通气轴孔1015通过第一管路与第一真空泵3相连并设有第一阀门8，通过第二管路与惰性气体检漏仪6相连并设有第二阀门9，惰性气体检漏仪6与第二真空泵4相连；所述第二管路上设有真空计5，真空计5设置在第二阀门9之前。The seal 101 is provided with a ventilation shaft hole 1015, the ventilation shaft hole 1015 communicates with the ceramic tube 102 to be tested, the ventilation shaft hole 1015 is connected with the first vacuum pump 3 through a first pipeline and is provided with a first valve 8 , is connected to the inert gas leak detector 6 through the second pipeline and is provided with a second valve 9, the inert gas leak detector 6 is connected to the second vacuum pump 4; the second pipeline is provided with a vacuum gauge 5, a vacuum gauge 5 Set before the second valve 9.
所述密封件101包括底部设有封堵头1014的封堵推杆1012和套设在封堵推杆1012上的密封套筒1011，通气轴孔1015贯通封堵头1014和封堵推杆1012，封堵头1014压于陶瓷管顶焊部位使得通气轴孔1015与陶瓷管空腔连通并且对顶焊区域进行密封。The seal 101 includes a plugging push rod 1012 with a plugging head 1014 at the bottom and a sealing sleeve 1011 sleeved on the plugging rod 1012, and the vent shaft hole 1015 penetrates the plugging head 1014 and the plugging rod 1012 , the plugging head 1014 is pressed against the top welding part of the ceramic tube so that the vent shaft hole 1015 communicates with the cavity of the ceramic tube and seals the top welding area.
所述封堵推杆1012和密封套筒1011之间设有三重密封圈1013。A triple sealing ring 1013 is provided between the blocking push rod 1012 and the sealing sleeve 1011 .
所述密封端盖105设置在导杆106上并连接有直线推杆107、经直线推杆107与腔体104压合，待测陶瓷管102通过连接件与密封端盖105固定设置。The sealing end cap 105 is arranged on the guide rod 106 and is connected with a linear push rod 107 , which is press-fitted with the cavity 104 through the linear push rod 107 , and the ceramic tube 102 to be tested is fixed with the sealing end cap 105 through a connector.
本实施例在第一密封型腔1和第一管路、第二管路之间设有第三阀门10控制第一管路、第二管路通断；本实施例在第二密封型腔2和第一管路、第二管路之间设有第四阀门11控制第一管路、第二管路通断。In this embodiment, a third valve 10 is provided between the first sealed cavity 1 and the first pipeline and the second pipeline to control the on-off of the first pipeline and the second pipeline; 2 and the first pipeline and the second pipeline are provided with a fourth valve 11 to control the on-off of the first pipeline and the second pipeline.
所述第一密封型腔1通过管路与消声器12相连并设有第五阀门13，所述第二密封型腔2通过管路与消声器12相连并设有第六阀门14，在相应测试密封型腔中陶瓷管102气密性检测结束后打开消声器12及相应阀门，避免爆震等现象，提高测试作业安全性及舒适性。The first sealed cavity 1 is connected to the muffler 12 through a pipeline and is provided with a fifth valve 13, and the second sealed cavity 2 is connected to the muffler 12 through a pipeline and is provided with a sixth valve 14. After the airtightness test of the ceramic tube 102 in the mold cavity, the muffler 12 and the corresponding valve are opened to avoid knocking and other phenomena, and improve the safety and comfort of the test operation.
本实施例在工作时，通过六轴机器人抓取经顶焊的待测陶瓷管102，将待测陶瓷管102固定在与第一密封型腔1中密封端盖105固定的连接件上，此时第二密封型腔2处于气密性检测中；When this embodiment is working, a six-axis robot grabs the top-welded ceramic tube 102 to be tested, and fixes the ceramic tube 102 to be tested on the connector fixed to the sealing end cap 105 in the first sealed cavity 1. When the second sealed cavity 2 is in the air tightness test;
待第二密封型腔2中检测结束，关闭第四阀门11和第二阀门9，通过直线推杆107将密封端盖105压合在腔体104上，再通过密封件101对陶瓷管102、第一密封型腔1进行密封，再打开第一阀门8和第三阀门10通过第一真空泵3抽真空，保压1～3秒后，通过真空计5读取真空值，若未发生真空泄露则打开惰性气体气罐7与第一密封型腔1之间的阀门通入惰性气体至一定压力再关闭，否则检修后保证无真空泄露再通入惰性气体；After the detection in the second sealed cavity 2 is finished, close the fourth valve 11 and the second valve 9, press the sealing end cover 105 on the cavity 104 through the linear push rod 107, and then pass the seal 101 to the ceramic tube 102, The first sealed cavity 1 is sealed, and then the first valve 8 and the third valve 10 are opened to evacuate through the first vacuum pump 3. After holding the pressure for 1 to 3 seconds, read the vacuum value through the vacuum gauge 5. If no vacuum leakage occurs Then open the valve between the inert gas tank 7 and the first sealed cavity 1 to feed the inert gas to a certain pressure and then close it, otherwise after maintenance, ensure that there is no vacuum leakage and then feed the inert gas;
在无真空泄露的情况下，关闭第一阀门8，打开第二阀门9，第二真空泵4工作，惰性气体检漏仪6抽取陶瓷管102中气体进行分析，判断陶瓷管102焊接后的气密性；之后取出密封件101并通过直线推杆107和导杆106抽拉出陶瓷管102，再通过六轴机器人抓取并对合格品与不合格品进行分类。In the case of no vacuum leakage, close the first valve 8, open the second valve 9, the second vacuum pump 4 works, the inert gas leak detector 6 extracts the gas in the ceramic tube 102 for analysis, and judges the airtightness of the ceramic tube 102 after welding. Afterwards, the seal 101 is taken out and the ceramic tube 102 is pulled out through the linear push rod 107 and the guide rod 106, and then the six-axis robot grabs and classifies the qualified products and the unqualified products.
所述惰性气体为氩气。The inert gas is argon.
第一密封型腔1和第二密封型腔2中陶瓷管102的焊接气密性检测交替进行，其中一个进行检测，另一个进行上下料，提高系统利用效率。The welding air tightness detection of the ceramic tube 102 in the first sealed cavity 1 and the second sealed cavity 2 is carried out alternately, one of which is tested, and the other is loaded and unloaded, so as to improve the utilization efficiency of the system.
所有管道采用不锈钢波纹管，外加卡箍进行连接，保证密封性。All pipes are connected with stainless steel bellows and clamps to ensure tightness.
第一真空泵3和第二真空泵4排出废气对接专用管道，避免污染。The exhaust gas discharged from the first vacuum pump 3 and the second vacuum pump 4 is connected to a dedicated pipeline to avoid pollution.
本实施例的检测漏率可达1.0×10-7mbarL/s，准确率高。In this embodiment, the detection leak rate can reach 1.0×10 -7 mbarL/s, and the accuracy rate is high.
需要强调的是：以上仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。It should be emphasized that: the above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are valid. Still belong to the scope of the technical solution of the present invention.
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