Nothing Special   »   [go: up one dir, main page]

WO2022227907A1 - 箱体的检漏方法及检漏系统 - Google Patents

箱体的检漏方法及检漏系统 Download PDF

Info

Publication number
WO2022227907A1
WO2022227907A1 PCT/CN2022/081242 CN2022081242W WO2022227907A1 WO 2022227907 A1 WO2022227907 A1 WO 2022227907A1 CN 2022081242 W CN2022081242 W CN 2022081242W WO 2022227907 A1 WO2022227907 A1 WO 2022227907A1
Authority
WO
WIPO (PCT)
Prior art keywords
box
gas
detected
tested
leak
Prior art date
Application number
PCT/CN2022/081242
Other languages
English (en)
French (fr)
Inventor
张宁
连登伟
赵宾
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to KR1020227033508A priority Critical patent/KR102695251B1/ko
Priority to EP22772398.8A priority patent/EP4116691A4/en
Priority to JP2022558555A priority patent/JP7398010B2/ja
Publication of WO2022227907A1 publication Critical patent/WO2022227907A1/zh
Priority to US18/122,792 priority patent/US12259297B2/en

Links

Images

Classifications

    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • 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
    • G01M3/32—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 for containers, e.g. radiators
    • 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
    • G01M3/007—Leak detector calibration, standard leaks
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/207—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material calibration arrangements
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
    • 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 application relates to the technical field of leak detection, and in particular, to a leak detection method and a leak detection system for a box body.
  • the battery includes a box body and a plurality of battery cells accommodated in the box body.
  • the box body includes a plurality of parts, and after the plurality of parts are connected, a space for accommodating the plurality of battery cells is defined.
  • a pressure relief mechanism is provided on the battery box. The pressure relief mechanism is used to release the internal pressure when the pressure or temperature inside the box reaches a threshold value, thereby ensuring the safety of the battery.
  • the sealing performance of the connection positions of various parts of the case and the sealing performance of the connection positions of the pressure relief mechanism and the case have an important impact on the safety performance of the battery.
  • Embodiments of the present application provide a leak detection method and a leak detection system for a box, so as to improve the accuracy of the leak detection structure.
  • an embodiment of the present application provides a leak detection method for a box body, including filling a tracer gas into a box body to be tested, and the box body to be tested has a plurality of positions to be detected;
  • the leak detection method for the box further includes:
  • the concentration of the tracer gas in the box to be measured is detected, and when the concentration reaches a preset range, the concentration of the tracer gas at each location to be detected is detected to obtain the leak rate of each location to be detected.
  • the detecting the concentration of the tracer gas in the box to be tested includes:
  • the gas in the box to be tested is led to a gas calibration detection device, and the concentration of the tracer gas in the gas in the box to be tested is detected by the gas calibration detection device.
  • the gas in the box to be measured is introduced to the gas calibration detection device to detect the concentration of the tracer gas, which is convenient for the detection of the concentration of the tracer gas, and makes the relative position of the gas calibration detection device and the box to be measured. Relationships can be more flexible.
  • the leak detection method for the box further includes:
  • the concentration of the tracer gas in the box under test is obtained, and it is determined whether the concentration of the tracer gas is within a preset range.
  • the concentration of the tracer gas in the box to be tested starts to be detected, and there is no need to detect the tracer in the box to be tested in real time or multiple times. Gas concentration, improve detection efficiency.
  • the leak detection method for the box further includes: acquiring a calibrated leak rate of the to-be-detected position.
  • the obtaining the calibrated leakage rate of the location to be detected includes:
  • the gas in the box to be measured is led out to the gas calibration detection device through the calibration mechanism, and when the concentration of the tracer gas in the box to be measured reaches a preset range, the calibration leak rate of the position to be detected is obtained.
  • the gas in the box is led out to the gas calibration detection device through the calibration mechanism to obtain the calibrated leakage rate of the box to be tested, which is not only convenient and convenient to obtain the calibrated leakage rate of the box to be tested, but also can improve the acquisition of the calibrated leakage rate. rate accuracy.
  • the leak detection method for the box further includes:
  • the gas in the box to be tested is drawn out.
  • the gas originally existing in the box to be measured is drawn out, which can make space for the tracer gas, so that the concentration of the tracer gas in the box to be measured can be increased. can reach the preset range.
  • the filling of the tracer gas and the discharge of the gas originally existing in the box to be measured are carried out simultaneously, and the diffusion of the tracer gas in the box to be measured can also be accelerated.
  • drawing out the gas in the box to be tested includes:
  • the box to be tested is drawn out from the second end of the box to be tested opposite to the first end Measure the gas in the box.
  • the second end of the box under test opposite to the first end is drawn out from the second end of the box under test that originally existed in the box under test.
  • the gas can not only make space for the tracer gas, so that the concentration of the tracer gas in the box to be measured can reach the preset range. It can also accelerate the uniform diffusion of the tracer gas in the box to be measured, and quickly fill the entire inside of the box to be measured, so that the concentration of the tracer gas in the box to be measured tends to be consistent.
  • the leak detection method for the box further includes:
  • the pressure difference between the box to be tested at the first moment and the second moment is acquired to determine whether the pressure difference exceeds a preset range.
  • the leak detection method for the box further includes:
  • the tracer gas in the box to be detected is drawn out.
  • the tracer gas in the box to be tested is drawn out, so as to avoid the tracer gas polluting the internal environment of the box to be tested and affecting the battery performance of the battery cells.
  • the leak detection method for the box further includes:
  • the plurality of positions to be detected are covered by a protective cover, so that the plurality of positions to be detected can leak the tracer gas into the protective cover.
  • a plurality of positions to be detected are covered by a protective cover, which can create a relatively clean and stable detection environment, minimize the influence of external airflow on the detection results, and improve the detection accuracy.
  • the plurality of positions to be detected are covered by a protective cover, so that the plurality of positions to be detected can leak tracer gas into the protective cover, comprising:
  • the plurality of positions to be detected are correspondingly covered by the plurality of the protective covers, so that the positions to be detected can leak tracer gas into the corresponding protective covers.
  • the corresponding position to be detected is set by the protective cover, and the leaked tracer gas can enter the corresponding protective cover, so as to create a clean and stable detection environment for the corresponding position to be detected, and the external airflow will affect the detection result.
  • the impact is minimized and the detection accuracy is improved.
  • an embodiment of the present application provides a leak detection system for performing leak detection on multiple to-be-detected positions of a box to be tested, and the leak detection system includes:
  • an inflator configured to inflate the tracer gas into the box to be tested
  • a gas detection device is provided corresponding to the position to be detected, and the gas detection device is configured to detect the leakage rate of the corresponding position to be detected.
  • the gas detection device can perform leak detection on each to-be-detected position of the box to be tested, and not only can determine the specific leakage position, so that the subsequent leakage prevention treatment can be implemented on the leaked position in a targeted manner.
  • the leakage rate of each location to be detected can be detected to provide a basis for what level of leakage prevention measures to take or whether to take leakage prevention measures, so as to obtain more accurate leakage information.
  • the leak detection system further includes a plurality of leak detection tools, the leak detection tools are arranged corresponding to the positions to be detected, and the gas detection device passes through the leak detection tools Installed in the to-be-detected position.
  • the gas detection device is installed at the position to be detected through a leak detection tool, which is convenient for the gas detection device to stably detect the position to be detected.
  • the leak detection system further includes a negative pressure device, the negative pressure device is configured to lead the gas at the position to be detected to the gas detection device.
  • the setting of the negative pressure device can quickly move the gas at the position to be detected to the gas detection device for detection, shorten the time for the gas leaking from the position to be detected to move to the gas detection device, thereby shortening the leak detection of the entire box. time and improve detection efficiency.
  • the gas detection device includes a gas sensor.
  • the gas sensor has the advantages of being able to work stably for a long time, having good repeatability, fast response, and being less affected by coexisting substances (such as ambient gas).
  • the leak detection system further includes a protective cover, the protective cover is configured to cover the plurality of positions to be detected, so that the plurality of positions to be detected can be directed to Tracer gas leaks in the shield.
  • the protective cover is provided with a plurality of positions to be detected, which can create a relatively clean and stable detection environment, minimize the influence of external airflow on the detection results, and improve detection accuracy.
  • the number of the shields is multiple, and the positions to be detected are set corresponding to the shields, so that the gas detection device detects the corresponding The leakage rate of the location to be detected, so that the location to be detected can leak tracer gas into the corresponding protective cover.
  • the corresponding position to be detected is set by the protective cover, and the leaked tracer gas can enter the corresponding protective cover, so as to create a clean and stable detection environment for the corresponding position to be detected, and the external airflow will affect the detection result.
  • the impact is minimized and the detection accuracy is improved.
  • the leak detection system further includes a gas calibration detection device, and the gas calibration detection device is configured to obtain a calibration leak rate of the box to be tested.
  • the gas calibration detection device can not only detect the concentration of the tracer gas in the box to be tested, but also obtain the calibration leak rate after the concentration of the tracer gas in the box to be tested reaches a preset range, which is the subsequent detection.
  • the leakage rate of each position to be tested provides a comparison value. Only when the leakage rate of each position to be tested is lower than the calibration leak rate, the sealing level of the box to be tested can meet the design requirements.
  • FIG. 1 is a schematic diagram of a first perspective of leak detection at a to-be-detected position of a to-be-detected box body provided by a leak detection system according to an embodiment of the present application;
  • FIG. 2 is a schematic diagram of a second perspective of leak detection at a to-be-detected position of a box to be detected by a leak detection system provided in an embodiment of the present application;
  • FIG. 3 provides a flowchart of a leak detection method for a box body according to some embodiments of the present application
  • FIG. 4 provides a flowchart of a leak detection method for a box body according to further embodiments of the present application
  • FIG. 5 provides a flow chart of a leak detection method for a box body according to other embodiments of the present application.
  • FIG. 6 is a schematic structural diagram of a box to be tested provided for some embodiments of the present application.
  • FIG. 7 provides a schematic structural diagram of a box to be tested according to further embodiments of the present application.
  • FIG. 8 is a schematic diagram of the direction of airflow in the box to be tested in FIG. 7;
  • FIG. 9 provides a flow chart of a leak detection method for a box body according to further embodiments of the present application.
  • FIG. 10 is a flowchart of a method for leak detection of a cabinet according to another embodiment of the present application.
  • FIG. 11 is a flowchart of a leak detection method for a box body provided by another embodiment of the present application.
  • FIG. 12 is a flowchart of a leak detection method for a box body provided in yet another embodiment of the present application.
  • FIG. 13 is a flowchart of a leak detection method for a box with a calibration step provided by some embodiments of the present application.
  • FIG. 15 provides a schematic diagram of a state of calibrating a box to be tested for some embodiments of the present application.
  • FIG. 16 provides a schematic diagram of another state for calibrating the box to be tested for some embodiments of the present application.
  • FIG. 17 is a flowchart of a leak detection method for a case provided by some embodiments of the present application.
  • FIG. 18 is a flowchart of a leak detection method for a box body provided by further embodiments of the present application.
  • FIG. 19 is a flowchart of a leak detection method for a box body provided by further embodiments of the present application.
  • FIG. 20 is a flowchart of a leak detection method for a box body provided by other embodiments of the present application.
  • FIG. 21 is a flowchart of a container leak detection method provided by other embodiments of the present application.
  • Icons 100 - leak detection system; 10 - box to be tested; 11 - position to be detected; 12 - first box wall; 13 - second box wall; 14 - inflation port; 15 - exhaust port; 16 - third box wall; 17- fourth box wall; 20- gas detection device; 30- leak detection tool; 31- body; 311- suction port; 32- roller; 33- suction pipe; 40- negative pressure device; 50- Trachea; 60-gas calibration detection device; 70-calibration mechanism; A-first direction; B-second direction.
  • plural refers to two or more (including two).
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., which are not limited in the embodiments of the present application.
  • the battery cell may be in the form of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which are not limited in the embodiments of the present application.
  • the battery cells are generally divided into three types according to the packaging method: cylindrical batteries, square batteries and soft pack batteries, which are not limited in the embodiments of the present application.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the batteries mentioned in this application may include battery modules or battery packs, and the like.
  • Batteries typically include a case for enclosing one or more battery cells. The box can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.
  • the box is a structure with accommodating space formed by a plurality of shell parts through detachable connection or fixed connection.
  • the accommodating space of the box can be used for accommodating battery cells.
  • the box can also be used to accommodate the required Other target bodies that are kept sealed.
  • the target body accommodated in the box may have a cylindrical body, a flat body, a rectangular parallelepiped, or other shapes, which are not limited in this embodiment of the present application.
  • the battery cells can be cylindrical, flat, cuboid or other shapes, etc.
  • the battery cells are generally divided into three types according to the packaging method: cylindrical battery cells , a square prismatic battery cell and a soft pack battery cell, which are not limited in the embodiments of the present application.
  • the sealing performance of the box is an important factor affecting the safety performance during charging and discharging. If the sealing performance cannot meet the design requirements, the external environment will easily affect the internal use environment of the battery box. For example, the sealing performance of the box is not good, resulting in poor waterproof performance. Water enters the box and causes an internal short circuit. When a short circuit occurs , overcharge and other phenomena, it may lead to thermal runaway inside the battery cell, resulting in a sudden increase in pressure or temperature, and in severe cases, the battery cell may explode or catch fire.
  • the commonly used method is to test the leakage rate of the box, and judge the sealing performance of the box according to the leakage rate. The smaller the leakage rate, the better the sealing performance, and vice versa, the worse the sealing performance.
  • the tracer gas will enter the space to be measured, and the leak rate of the box can be obtained by detecting the concentration of the tracer gas in the space to be measured.
  • this detection method obtains the leakage rate of the entire tank, and cannot determine the specific location where the tank leaks and the leakage rate of the specific leakage location.
  • the embodiments of the present application provide a technical solution, by performing leak rate detection on each to-be-detected position of the box body, thereby determining a specific leak position and a leak rate of the leak position.
  • the case of the battery is used as the case 10 to be tested for description.
  • an embodiment of the present application provides a leak detection system 100 for performing leak detection on a plurality of to-be-detected locations 11 of the box body 10 to be tested.
  • the leak detection system 100 includes an inflator (not shown in the figure). shown) and the gas detection device 20.
  • the inflator is configured to inflate the box 10 to be tested with tracer gas.
  • the gas detection device 20 is disposed corresponding to the position to be detected 11 , and the gas detection device 20 is configured to detect the leakage rate of the corresponding position to be detected 11 .
  • the gas detection device 20 is set corresponding to the position to be detected 11
  • the gas detection device 20 and the position to be detected 11 are set in one-to-one correspondence, and the number of the positions to be detected 11 is multiple, then the corresponding gas detection The number of devices 20 is the same as the number of positions 11 to be detected.
  • the gas detection device 20 is set corresponding to the position to be detected 11 can also be understood as a gas detection device 20 to detect the leakage rate of a position to be detected 11, even if there is only one gas detection device 20, the gas detection device 20 The leak rate of each to-be-detected location 11 is detected separately.
  • the leakage rate of each location 11 to be detected provides a basis for which level of leakage prevention measures to take or whether to take leakage prevention measures, so as to obtain more accurate leakage information.
  • Tracer gas is a gas used for leak detection. The quality of the tracer gas itself makes it easy to detect or track. After mixing with air, it cannot change anything and can be measured at very low concentrations. Tracer gases include helium, carbon dioxide, ammonia, hydrogen, and the like.
  • the gas detection device 20 can be selected differently according to different tracer gases.
  • the gas detection device 20 includes a gas sensor, such as a semiconductor gas sensor, a pyroelectric sensor, an optical fiber sensor, and a palladium alloy thin film hydrogen sensor.
  • Gas sensors have the advantages of long-term stable operation, good repeatability, fast response, and little influence by coexisting substances (such as ambient gases).
  • the gas detection device 20 detects the concentration of the tracer gas in real time.
  • the gas detection device 20 may also include a helium mass spectrometer leak detector.
  • a helium mass spectrometer leak detector helium or hydrogen gas is used as the tracer gas.
  • the background noise of helium is low, that is, the detection environment is in the atmosphere, and the content of helium in the atmosphere is very small, which will not affect the detection accuracy.
  • the molecular weight and viscosity coefficient of helium are small, so it is easy to pass through leaks and diffuse; in addition, helium is an inert gas and does not corrode equipment, so helium is often used as a tracer gas. Place the helium mass spectrometer leak detector at the position to be detected 11.
  • the helium mass spectrometer leak detector will react, so that the position to be detected can be known. 11 Whether leakage occurs and the size of the leakage rate.
  • the leak detection system 100 further includes a plurality of leak detection tooling 30 , the leak detection tooling 30 is arranged corresponding to the position to be detected 11 , and the gas detection device 20 is installed at the position to be detected 11 through the leak detection tool 30 . Since the structural size of the leak detection tool 30 is constant, after the gas detection device 20 is installed at the position to be detected 11 through the leak detection tool 30, the distance between the gas detection device 20 and the position to be detected 11 is constant, so that the gas detection device 20 is prevented from being damaged by the gas detection device 20. The distance to the position to be detected 11 varies thereby affecting the leak detection result. In addition, the gas detection device 20 is installed at the position to be detected 11 through the leak detection tool 30 , so that the gas detection device can stably detect the position to be detected 11 .
  • a position 11 to be detected of the box body 10 to be tested is a bar-shaped sealing position
  • the sealing position has a certain length
  • the leak detection tool 30 corresponding to the sealing position includes a body 31 and a sealing position.
  • Two rollers 32, the rollers 32 are rotatably arranged on the main body 31, the main body 31 is provided with a suction port 311, and a suction pipe 33 is arranged between the two rollers 32, the two rollers 32 define the suction position, and the suction
  • the pipe 33 communicates with the suction port 311
  • the gas detection device 20 is installed on the leak detection tool 30 and communicates with the suction pipe 33 through the suction port 311, and the gas leaking from the position to be detected 11 can pass through the suction pipe 33 and the suction port.
  • 311 arrives at the gas detection device 20 .
  • the roller 32 is in contact with the sealing interface at the sealing position, and the rotation of the roller 32 can drive the leak detection tool 30 to move along the sealing interface so as to change the corresponding position of the suction pipe 33 .
  • the leak detection fixture 30 maintains a constant distance between the sealing interface and the gas detection device.
  • the leak detection tool 30 can also be a profiling cover.
  • the profiling cover is a structure that matches the structure of the position to be detected.
  • the position to be detected is the bolt connection position
  • the interior of the profiling cover is a cavity that matches the shape of the nut and washer.
  • the position to be detected is At the connection position of the pressure relief mechanism, the interior of the profiling cover is a cavity matching the shape of the pressure relief mechanism.
  • the leak detection system 100 further includes a negative pressure device 40 configured to introduce the gas at the location 11 to be detected to the gas detection device 20 .
  • the negative pressure device 40 is connected to the side of the gas detection device 20 away from the leak detection tool 30 , that is, downstream of the gas detection device 20 .
  • the negative pressure device sucks the gas at the position 11 to be detected from the suction port 311 to the gas detection device 20 in the form of negative pressure, so that the gas detection device 20 can detect the tracer gas leaking from the corresponding position 11 to be detected. concentration.
  • the setting of the negative pressure device 40 can make the gas at the position to be detected 11 move quickly to the gas detection device 20 for detection, shorten the time for the gas leaking from the position to be detected 11 to move to the gas detection device 20, thereby shortening the leak detection of the entire box time and improve detection efficiency.
  • the corresponding leak detection tooling 30 may have different structures.
  • the leak detection system further includes a gas calibration detection device (not shown in FIG. 1 and FIG. 2 ), and the gas calibration detection device is configured to obtain the calibration leak rate of the box 10 to be tested.
  • the gas calibration detection device can not only detect the concentration of the tracer gas in the box 10 to be tested, but also calibrate the leakage rate after the concentration of the tracer gas in the box 10 to be tested reaches a preset range, which is the standard for subsequent detection of each to-be-measured gas.
  • the leakage rate of the detection position 11 provides a comparison value. Only when the leakage rate of each position to be detected 11 is lower than the calibration leakage rate, the sealing level of the box to be tested 10 can meet the design requirements, that is, the sealing of the box to be tested is qualified.
  • the gas calibration detection device and the gas detection device 20 may be the same detection device, and the detection device first acts as a gas calibration detection device to detect the concentration of the tracer gas in the box 10 to be tested, and to detect the concentration of the tracer gas in the box 10 to be tested. After the concentration of the trace gas reaches the preset range, the calibration leak rate of the box to be tested 10 is obtained, and after the calibration leak rate of the box to be tested 10 is obtained, it is then used as a gas detection device to detect the leak rate of each position to be detected, and then each The leak rate at location 11 is compared to the previously obtained calibrated leak rate.
  • the gas calibration detection device and the gas detection device 20 may be independent detection devices.
  • the leak detection system further includes a protective cover (not shown in the figure), the protective cover is configured to cover a plurality of positions 11 to be detected, so that the plurality of positions to be detected 11 can be directed into the protective cover Leak tracer gas.
  • a protective cover configured to cover a plurality of positions 11 to be detected, so that the plurality of positions to be detected 11 can be directed into the protective cover Leak tracer gas.
  • the box body 10 to be tested is put into the protective cover as a whole, each position to be detected 11 can leak tracer gas into the protective cover, and the gas detection device 20 detects the corresponding gas in the protective cover. Leak rate at location 11 to be detected.
  • the gas detection device is arranged outside the protective cover, and the gas detection device is located outside the protective cover by guiding the gas at the corresponding position 11 to be detected to the gas detection device outside the protective cover through the negative pressure device. The concentration of the tracer gas leaked from the location 11 to be detected is detected.
  • the number of protective covers is multiple, the positions 11 to be detected are set corresponding to the protective covers, and the number of positions to be detected 11 is the same as the number of protective covers, so that the gas detection device 20 can detect the corresponding to-be-detected covers through the protective covers.
  • the leakage rate of the location 11 is detected, so that the location 11 to be detected can leak tracer gas into the corresponding protective cover.
  • the leaked tracer gas can enter the corresponding protective cover, so as to create a clean and stable detection environment for the corresponding position 11 to be detected, and reduce the influence of external airflow on the detection result to a minimum At a minimum, it can also avoid mutual interference of tracer gases leaked at the positions 11 to be detected, and further improve the detection accuracy.
  • an embodiment of the present application further provides a leak detection method for a box body.
  • the box body 10 to be tested has a plurality of positions 11 to be detected.
  • the leak detection method for the box body includes:
  • Step S100 filling the box 10 to be tested with tracer gas
  • Step S200 detecting the leakage rate of each position 11 to be detected.
  • each to-be-detected position 11 of the box to be tested 10 By performing leak detection on each to-be-detected position 11 of the box to be tested 10 , not only can the specific leak position be determined, so that the leak-proof position can be targeted to be leak-proof in the future, but also each to-be-detected position can be detected.
  • the leak rate at position 11 improves the accuracy of leak detection of the box, and at the same time provides a basis for which level of leak-proof measures to take or whether to take leak-proof measures.
  • the leak detection method of the box further includes:
  • Step S300 during the process of filling the box 10 to be tested with tracer gas, the gas in the box 10 to be tested is drawn out.
  • the gas originally existing in the box 10 to be tested is drawn out, which can make room for the tracer gas, so that the tracer gas in the box 10 to be tested can be freed from the gas.
  • the concentration can reach a preset range to avoid negative pressure inside the box 10 to be tested.
  • the filling of the tracer gas and the discharge of the gas originally existing in the box 10 to be measured are performed simultaneously, and the diffusion of the tracer gas in the box 10 to be measured can also be accelerated.
  • step S300 includes:
  • Step S310 in the process of filling the tracer gas from the first end of the box under test 10 into the box under test 10 , draw out the box under test from the second end of the box under test 10 opposite to the first end gas within 10.
  • the first end and the second end of the box to be tested 10 are arranged opposite to each other.
  • the first end of the box to be tested 10 is provided with an inflation port 14 for filling tracer gas into the box to be tested 10 .
  • the second end of 10 is provided at an exhaust port 15 for exhausting the gas inside the box.
  • the replacement method of inflating the opposite end of the box 10 to be tested and exhausting the other end can form a fixed gas flow direction, and the tracer gas is rapidly diffused to various parts inside the box 10 to be tested under the driving of the airflow, greatly reducing the gas flow rate.
  • the efficiency is improved, so that the concentration of the tracer gas in the box 10 to be measured can be made uniform quickly.
  • Each charging channel and exhaust channel is equipped with a pressure regulating valve and a solenoid valve, which can flexibly adjust the pressure parameters and time.
  • first end and the second end of the box to be tested 10 are arranged opposite each other
  • first end and the second end of the box to be tested 10 are respectively the first and second ends of the box to be tested 10 along the first direction A
  • the air inlet 14 is arranged on the first side
  • the exhaust port 15 is arranged on the second side.
  • the central axis of the charging port 14 and the central axis of the exhaust port 15 are arranged in parallel or at an included angle.
  • the inflation port 14 is provided on the first tank wall 12
  • the exhaust port 15 is provided on the second tank wall 13 .
  • the central axis of the air inlet 14 and the central axis of the exhaust port 15 are parallel, the tracer gas diffuses in the direction of the solid arrow in the figure, and the original gas inside the box 10 to be tested moves in the direction of the hollow arrow in the figure.
  • the box 10 to be tested also has a third box wall 16 and a fourth box wall 17 oppositely arranged along the second direction B.
  • the first direction A and the second direction B are perpendicular.
  • One side wall, the exhaust port 15 is arranged on the third side wall and is close to the second side wall, and the first end and the second end are arranged approximately opposite to each other. As shown in FIG. 7 , the box 10 to be tested also has a third box wall 16 and a fourth box wall 17 oppositely arranged along the second direction B.
  • the first direction A and the second direction B are perpendicular.
  • One side wall, the exhaust port 15 is arranged on the third side wall and is close to the second side wall, and the first end and the second end are arranged approximately opposite to each other.
  • the tracer gas in the process of discharging the gas originally existing in the box 10 to be tested from the exhaust port 15 , that is, in the direction shown by the hollow arrow in the figure, the tracer gas can move along the first
  • the direction A and the second direction B diffuse rapidly inside the box 10 to be tested, which can further accelerate the diffusion rate, and can quickly fill the entire interior of the box 10 to be tested with the tracer gas, so that the tracer gas in the box 10 to be tested can be quickly filled.
  • the gas concentrations tend to be the same.
  • step S300 further includes:
  • step S320 during the process of filling the tracer gas into the box under test 10, after the gas in the box under test 10 is drawn out for a period of time, stop drawing out the gas in the box under test 10 and continue to supply the gas in the box under test 10. Fill with tracer gas within 10.
  • the leak detection method of the box further includes:
  • step S400 the pressure difference between the first time and the second time of the box 10 to be tested is obtained, so as to determine whether the pressure difference exceeds a preset range.
  • the internal pressure of the box to be tested 10 exceeds the preset range, it means that the box to be tested 10 has a leakage position with a relatively large leakage rate.
  • the pressure in the test box 10 cannot always reach the preset range, which is difficult to meet the detection requirements, and a large amount of tracer gas will be discharged in the detection environment, which will affect the detection results. Need to repair the box to be tested. Therefore, it is necessary to detect whether the case 10 to be tested has a leakage position with a larger leakage rate.
  • step S100 is performed to prevent the case 10 to be tested from having a position with a high leakage rate, causing the tracer gas to leak from a position with a high leakage rate and affecting the detection of the gas detection device 20 result and pollute the environment.
  • step S100 it can also be realized by vacuuming before step S100, so as to detect whether there is a position with a high leakage rate in the box 10 to be tested. If there is no position with a large leakage rate, after the vacuuming of the box 10 to be tested reaches a certain period of time, for example, the vacuuming time period is from the first time to the second time, and the pressure inside the box 10 to be tested at the first time is the same as that of the test box 10. At the second moment, the pressure difference inside the box body 10 to be measured is within a predetermined range.
  • the difference between the pressure inside the box 10 to be measured at the first moment and the pressure inside the box 10 to be measured at the second moment will exceed a predetermined range.
  • a negative pressure can be formed in the test box 10.
  • the tracer gas The diffusion rate in the box 10 to be tested will be greatly increased.
  • the negative pressure in the box 10 to be tested cannot exceed the negative pressure bearing capacity of the box 10 to be tested.
  • the leak detection method of the box further includes:
  • Step S500 detect the concentration of the tracer gas in the box 10 to be tested, and when the concentration reaches a preset range, detect the concentration of the tracer gas at each position to be detected 11 to obtain the leak rate of each of the positions to be detected 11 .
  • the concentration of the tracer gas in the box 10 to be tested reaches the preset range, the leakage rate of each position 11 to be detected is detected, so that the concentration of the tracer gas in the box to be tested reaches the detection condition, and the leakage rate in the box 10 to be tested is eliminated. Differences in trace gas concentrations cause differences in leak detection.
  • the concentration of the tracer gas in the box under test is obtained, and it is determined whether the concentration of the tracer gas is within a preset range.
  • the detection of the concentration of the tracer gas in the box under test is started, and there is no need to detect the tracer gas in the box under test 10 in real time or multiple times. concentration to improve detection efficiency.
  • step S500 includes:
  • step S510 the gas in the box 10 to be measured is led to the gas calibration detection device 60 , and the concentration of the tracer gas in the gas in the box 10 to be measured is detected by the gas calibration detection device 60 .
  • the gas in the box 10 to be tested is introduced to the gas detection device 20 to detect the concentration of the tracer gas, which is convenient for the detection of the concentration of the tracer gas, and the relative positional relationship between the gas detection device 20 and the box 10 to be tested can be more flexible.
  • the leak detection method of the box further includes:
  • Step S520 when the concentration of the tracer gas in the box 10 to be tested reaches a preset range, obtain the calibrated leak rate of the box 10 to be tested.
  • the sealing level of the box 10 to be tested can meet the design requirements.
  • step S510 and step S520 can also be regarded as the same step, that is, if the concentration of the tracer gas in the box 10 to be measured is within a preset range measured in step S510, the calibration leakage can be obtained by conversion Rate.
  • step S520 includes:
  • Step S521 the gas in the box to be measured 10 is led out to the gas calibration and detection device 60 through the calibration mechanism 70 to obtain the calibrated leakage rate of the box to be measured. Not only is it convenient to obtain the calibrated leak rate of the box 10 to be tested, but also the accuracy of obtaining the calibrated leak rate can be improved.
  • the leak detection method of the box body further includes: acquiring a calibrated leak rate of the to-be-detected position. After obtaining the calibrated leak rate of the location to be tested, compare the leak rate of the location to be detected with the corresponding calibrated leak rate. If the leak rate of the location to be detected is lower than the calibrated leak rate, the seal design of the location to be detected meets the requirements. In order to ensure that the sealing of each position to be tested meets the design requirements.
  • obtaining the calibrated leakage rate of the position to be detected includes: leading the gas in the box to be measured 10 to the gas calibration and detection device 60 through the calibration mechanism 70 , when the concentration of the tracer gas in the box to be measured 10 is After reaching the preset range, the calibrated leakage rate of the position 11 to be detected is obtained.
  • the gas in the box 10 to be tested is led out to the gas calibration detection device 60 through the calibration mechanism 70 to obtain the calibrated leakage rate of the box 10 to be tested.
  • This process is called calibration.
  • the calibration mechanism 70 is a mechanism with standard leak holes, and the calibration mechanism 70 can be a profiling device according to the corresponding to-be-detected position 11 , and the profiling device is provided with a standard leak hole. After the tracer gas passes through the calibration mechanism 70, the detected gas concentration is the standard concentration.
  • the concentration of the tracer gas detected at the location to be detected 11 is compared with the standard concentration, and the result can be obtained Whether the corresponding position to be measured meets the sealing requirements, and the leakage rate can be obtained by converting the tracer gas concentration.
  • step S400 the gas taken from the exhaust port 15 of the box to be tested 10 can be connected to the gas calibration detection device 60 corresponding to each position to be detected 11 through the gas pipe 50. Specifically, the gas pipe 50 can pass through each position to be detected 11.
  • the corresponding calibration mechanism 70 is connected to the gas calibration detection device 60 , and the gas concentration measured by the gas calibration detection device 60 can be converted to obtain the concentration of the tracer gas in the box 10 to be measured. And when the concentration of the tracer gas in the box 10 to be tested reaches the preset range, the gas calibration detection device 60 can also obtain the calibrated leak rate of the box 10 to be tested.
  • the gas concentration in the box 10 to be tested can be controlled within a measurable range corresponding to the standard leakage rate, thereby improving the test accuracy.
  • the range of the concentration of the tracer gas real-time monitoring of the test loop of the gas detection device 20 can be realized, an abnormality of the leak detection system can be detected in time, and quality risks can be avoided.
  • a plurality of calibration mechanisms 70 are communicated through the same air pipe 50, which can not only take air from the same place (for example, all air from the exhaust port 15), reduce the number of air taking positions, and can simultaneously Position calibration to improve calibration efficiency.
  • the gas calibration detection device 60 and the gas detection device 20 are the same detection device.
  • a calibration mechanism 70 is correspondingly provided at each position to be detected 11
  • a leak detection tool 30 is correspondingly provided at each position to be detected 11
  • a gas calibration detection device 60 is correspondingly provided in each calibration mechanism 70
  • each calibration mechanism 70 Connected with the exhaust port 15 (or the inflation port 14 ) through the gas pipe 50 , the gas calibration detection device 60 (gas detection device 20 ) can communicate with the calibration mechanism 70 and the suction port 311 of the leak detection tool 30 corresponding thereto.
  • the gas calibration detection device 60 gas detection device 20
  • the suction port 311 of the leak detection tool 30 are disconnected, and the gas calibration detection device 60 (gas detection device 20 ) and the calibration Mechanism 70 is connected.
  • the gas in the box to be tested 10 passes through the gas pipe 50 and the calibration mechanism 70 from the exhaust port 15 and finally reaches the gas calibration detection device 60 (gas detection device 20 ), and finally is measured by the gas calibration detection device 60 (gas detection device 20 ).
  • the concentration of the tracer gas obtains the calibrated leak rate of the box 10 to be tested.
  • the gas calibration detection device 60 (gas detection device 20 ) at the corresponding position to be detected is communicated with the suction port 311 of the leak detection tool 30 , and the gas calibration detection device 60 is connected.
  • the (gas detection device 20 ) is disconnected from the calibration mechanism 70 , the gas in the box to be detected 10 leaks from the position to be detected 11 and passes through the corresponding leak detection tool 30 to finally reach the gas calibration detection device 60 (gas detection device 20 ), and finally Obtain the leakage rate of the corresponding position to be detected 11 and compare it with the calibration leak rate. If the leakage rate of the position to be detected 11 is lower than the calibration leak rate, the sealing of the corresponding position to be detected 11 meets the design requirements.
  • the calibration leak rate can also be obtained by connecting the gas calibration detection device 60 (gas detection device 20 ) to the calibration mechanism 70 of the corresponding position to be detected 11 , and then the gas calibration detection device 60 (gas detection device 60 ) The device 20) is moved to the leak detection tool 30 corresponding to the corresponding position 11 to be detected, and the leak rate detection of the position 11 to be detected is performed.
  • the gas calibration detection device 60 and the gas detection device 20 are the same detection device, and the number of the gas calibration detection device 60 (gas detection device 20 ) is one, and the gas calibration detection device 60 (gas detection device 20 ) The calibrated leakage rate of the corresponding position is obtained at each position to be detected 11 in turn, and the leakage rate detection of the position to be detected 11 is performed.
  • the gas calibration detection device 60 and the gas detection device 20 are independent detection devices, and the gas calibration detection device 60 communicates with the calibration mechanism 70 corresponding to the to-be-detected position 11 for acquiring the calibration corresponding to the to-be-detected position 11 .
  • Leakage rate the gas detection device 20 communicates with the suction port 311 of the leak detection tool 30 at the corresponding position 11 to be detected, and is used to detect the leakage rate of the position 11 to be detected.
  • the leak detection method of the box further includes:
  • Step S600 after detecting the leakage rate of each position 11 to be detected, the tracer gas in the box 10 to be detected is drawn out.
  • the tracer gas in the box to be tested 10 is drawn out to prevent the tracer gas from polluting the internal environment of the box to be tested 10 and affecting the battery performance of the battery cells.
  • the leak detection method of the box further includes:
  • Step S700 before filling the box 10 to be tested with tracer gas, cover the multiple locations 11 to be detected by a protective cover, so that the multiple locations 11 to be detected can leak tracer gas into the protective cover.
  • the plurality of positions to be detected 11 are covered by the protective cover, which can create a relatively clean and stable detection environment, minimize the influence of external airflow on the detection results, and improve the detection accuracy.
  • step S700 includes:
  • step S710 a plurality of positions 11 to be detected are correspondingly covered by a plurality of protective covers, so that the positions 11 to be detected can leak tracer gas into the corresponding protective covers.
  • the leaked tracer gas can enter the corresponding protective cover, so as to create a clean and stable detection environment for the corresponding position 11 to be detected, and reduce the influence of external airflow on the detection result to a minimum minimum, improve detection accuracy.
  • the pressure relief mechanism is used to actuate when the pressure or temperature inside the casing reaches a threshold value, so as to discharge the pressure inside the casing.
  • the pressure relief mechanism can take the form of an explosion-proof valve, an explosion-proof disc, a gas valve, a pressure relief valve or a safety valve, etc., and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery reaches a predetermined When the threshold value is reached, the pressure relief mechanism performs an action or the weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or a channel for releasing the internal pressure or temperature.
  • actuated means that the pressure relief mechanism is actuated or activated to a certain state, so that the internal pressure and temperature of the battery can be released.
  • Actions produced by the pressure relief mechanism may include, but are not limited to, at least a portion of the pressure relief mechanism being ruptured, shattered, torn or opened, and the like.
  • the leak detection method of the box further includes:
  • Step S800 before filling the tracer gas into the box 10 to be tested, press the pressure relief mechanism on the box 10 to be tested to prevent the pressure relief mechanism from being actuated when the pressure in the box 10 to be tested reaches a threshold value . It is avoided that the pressure relief mechanism becomes one of the leakage locations, which affects the accuracy of the leak rate detection at the location 11 to be detected of the box body 10 to be tested.
  • the position for installing a connector is blocked to prevent the tracer gas from leaking from the position where the connector is installed and affecting the detection result.
  • the leak detection method of the box further includes:
  • Step S900 before filling the box 10 to be tested with the tracer gas, detect the concentration of the tracer gas in the environment where the gas detection device 20 is located. It is avoided that the background tracer gas exists in the environment where the gas detection device 20 is located, resulting in a high concentration of the tracer gas detected by the gas detection device 20 , and thus a high leakage rate of the corresponding to-be-detected location 11 .
  • the multi-channel gas detection device 20 When detecting the tracer gas concentration in the environment where the gas detection device 20 is located, the multi-channel gas detection device 20 can be used for parallel testing.
  • the test points have been arranged in the corresponding environment to be tested in advance, and the gas in the box 10 to be tested starts to be discharged.
  • the gas detection device 20 is activated at the same time, the monitoring of the tracer gas concentration in the environment can be realized, which can effectively monitor the background tracer gas concentration in the environment where the gas detection device 20 is located, and avoid the test value being too large due to the excessive background concentration. .
  • an exhaust system can be used to remove the escaped tracer gas in time.
  • the concentration of the tracer gas in the environment where the detection gas detection device 20 (the gas detection device 20 for detecting the concentration of the tracer gas leaked from the location 11 to be detected) is located can be detected by a separate detection device, or It can be detected with a machine testing device that is about to be placed in the environment.
  • step S900 is performed first, then step S700 (or step S710) is performed, and then step S800 is performed; or step S800 is performed first, then step S700 (or step S710) is performed, and then step S900 is performed; or step S700 (or step S700) is performed first (or step S700).
  • step S710) then perform step S800, and then perform S900.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

本申请提供了一种箱体的检漏方法及检漏系统，涉及检漏技术领域。箱体的检漏方法，包括向待测箱体内充入示踪气体，所述待测箱体具有多个待检测位置；检测各个待检测位置的泄漏率。通过对待测箱体的每个待检测位置进行泄漏检测，不仅能够确定具体的泄漏位置，以使后续能够实现有针对性地对泄漏的位置进行防漏处理，还能检测每个待检测位置的泄漏率，以为采取何种级别的防漏措施或者是否采取防漏措施提供依据，从而提高箱体的泄漏检测的精度。

Description

箱体的检漏方法及检漏系统
相关申请的交叉引用
本申请本申请要求享有于2021年04月30日提交的名称为“箱体的检漏方法及检漏系统”的中国专利申请202110488231.1的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及检漏技术领域，具体而言，涉及一种箱体的检漏方法及检漏系统。
背景技术
电池包括箱体和容纳于箱体内的多个电池单体，箱体包括多个部分，多个部分连接后限定出容纳多个电池单体的空间。此外为了电池的安全性能，在电池的箱体上设有泄压机构，泄压机构用于在箱体的内部的压力或温度达到阈值时泄放内部的压力，从而保证电池的安全。箱体的各个部分的连接位置的密封性能、泄压机构与箱体的连接位置的密封性能对电池的安全性能有重要影响。因此，需要对箱体的各个部分的连接位置、泄压机构与箱体的连接位置进行检漏，以检测其密封性能是否满足需求。但是现有的检漏方法及检漏工装只能获得粗略的检测结果，难以满足高密封性能的要求。
发明内容
本申请实施例提供一种箱体的检漏方法及检漏系统，以提高检漏结构的准确性。
第一方面，本申请实施例提供一种箱体的检漏方法，包括向待测箱体内充入示踪气体，所述待测箱体具有多个待检测位置；
检测各个待检测位置的泄漏率。
上述技术方案中，通过对待测箱体的每个待检测位置进行泄漏检测，不仅能够确定具体的泄漏位置，以使后续能够实现有针对性地对泄漏的位置进行防漏处理，还能检测每个待检测位置的泄漏率，提高箱体的泄漏检测的精度，同时以为采取何种级别的防漏措施或者是否采取防漏措施提供依据。
在本申请第一方面的一些实施例中，所述箱体的检漏方法还包括：
检测所述待测箱体内的示踪气体的浓度，当所述浓度达到预设范围后，检测各个待检测位置的示踪气体浓度，以得到各个待检测位置的泄漏率。
上述技术方案中，当待测箱体内的示踪气体浓度达到预设范围后，检测各个待检测位置的泄漏率，以使待测箱体内的示踪气体浓度达到检测条件，消除待测箱体内示踪气体浓度差异造成泄漏检测差异。
在本申请第一方面的一些实施例中，所述检测所述待测箱体内的示踪气体的浓度包括：
将所述待测箱体内的气体引至气体标定检测装置处，通过所述气体标定检测装置检测所述待测箱体内的气体中的示踪气体的浓度。
上述技术方案中，将待测箱体内的气体引至气体标定检测装置处后进行示踪气体浓度检测，便于示踪气体浓度检测的进行，并且使得气体标定检测装置和待测箱体的相对位置关系可以更加灵活。
在本申请第一方面的一些实施例中，所述箱体的检漏方法还包括：
向所述待测箱体充入预定时间的示踪气体后，获取所述待测箱体内的示踪气体浓度，判断示踪气体浓度是否在预设范围。
上述技术方案中，当向待测箱体内充入示踪气体的达到预定时间段后，则开始检测待测箱体内的示踪气体浓度，不需要实时或者多次检测待测箱体内的示踪气体浓度，提高检测效率。
在本申请第一方面的一些实施例中，所述箱体的检漏方法还包括：获取所述待检测位置的标定泄露率。
上述技术方案中，获取待测位置的标定泄漏率后，将待检测位置的泄漏率与对应的标定泄漏率对比后，若是待检测位置的泄漏率低于标定泄漏率，则待检测位置的密封设计满足需求。
在本申请第一方面的一些实施例中，所述获取所述待检测位置的标定泄露率包括：
将所述待测箱体内的气体经标定机构引出到气体标定检测装置处，当所述待测箱体内的示踪气体浓度达到预设范围后，获取待检测位置的标定泄露率。
上述技术方案中，将箱体内的气体经标定机构引出到气体标定检测装置处，获取待测箱体的标定泄露率，不仅方便方便获取待测箱体的标定泄漏率，还能够提高获取标定泄漏率的准确度。
在本申请第一方面的一些实施例中，所述箱体的检漏方法还包括：
在向所述待测箱体内充入示踪气体的过程中，引出所述待测箱体内的气体。
上述技术方案中，向待测箱体内充入示踪气体的过程中，引出待测箱体内原本存在的气体，能够为示踪气体让出空间，以使待测箱体内的示踪气体的浓度能够达到预设范围。并且充入示踪气体和排出待测箱体内原本存在的气体同时进行，还能加速示踪气体在待测箱体内扩散。
在本申请第一方面的一些实施例中，所述在向待测箱体内充入示踪气体的过程中，引出所述待测箱体内的气体包括：
从所述待测箱体的第一端向所述待测箱体内充入示踪气体的过程中，从所述待测箱体的与所述第一端相对的第二端引出所述待测箱体内的气体。
上述技术方案中，从待测箱体的第一端向待测箱体内充入示踪气体的过程中，从待测箱体的与第一端相对的第二端引出待测箱体内原本存在的气体，不仅能够为示踪气体让出空间，以使待测箱体内的示踪气体的浓度能够达到预设范围。还能加速示踪气体在待测箱体内均匀扩散，并快速充满整个待测箱体内部，以使待测箱体内的示踪气体的浓度趋于一致。
在本申请第一方面的一些实施例中，所述箱体的检漏方法还包括：
获取所述待测箱体在第一时刻与第二时刻的压力差，以判断所述压力差是否超出预设范围。
上述技术方案中，当进行箱体泄漏检测时，需要待测箱体内部保持一定的压力，以满足检测需求。此外，若是待测箱体没有泄露率较大的位置，在一定的时间段内，待测箱体内部的压力会处于某一预设范围内，若是超出预设范围则说明有泄漏率较大的位置，需要对待测箱体返修。
在本申请第一方面的一些实施例中，所述箱体的检漏方法还包括：
在所述检测各个待检测位置的泄漏率之后，引出所述待测箱体内的示踪气体。
上述技术方案中，待测箱体泄漏检测完成后，引出待测箱体内的示踪气体，避免示踪气体污染待测箱体内部环境，影响电池单体的电池性能。
在本申请第一方面的一些实施例中，所述箱体的检漏方法还包括：
在所述向待测箱体内充入示踪气体之前，通过防护罩将所述多个待检测位置罩设，以使所述多个待检测位置能够向所述防护罩内泄漏示踪气体。
上述技术方案中，通过防护罩将多个待检测位置罩设，能够营造较为清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，提高检测精度。
在本申请第一方面的一些实施例中，所述通过防护罩将所述多个待检测位置罩设，以使所述多个待检测位置能够向所述防护罩内泄漏示踪气体包括：
通过多个所述防护罩将所述多个待检测位置对应罩设，使待检测位置能够向对应的所述防护罩内泄漏示踪气体。
上述技术方案中，通过防护罩罩设对应的待检测位置，泄漏的示踪气体能够进入对应的防护罩内，以为对应的待检测位置营造清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，提高检测精度。
第二方面，本申请实施例提供一种检漏系统，用于对待测箱体的多个待检测位置进行泄漏检测，检漏系统包括：
充气装置，被配置为给待测箱体内充入示踪气体；
气体检测装置，气体检测装置与待检测位置对应设置，气体检测装置被配置为检测对应的待检测位置的泄漏率。
上述技术方案中，气体检测装置能够对待测箱体的每个待检测位置进行泄漏检测，不仅能够确定具体的泄漏位置，以使后续能够实现有针对性地对泄漏的位置进行防漏处理，还能检测每个待检测位置的泄漏率，以为采取何种级别的防漏措施或者是否采取防漏措施提供依据，从而获取更为精确的泄漏信息。
在本申请第二方面的一些实施例中，所述检漏系统还包括多个检漏工装，所述检漏工装与所述待检测位置对应设置，所述气体检测装置通过所述检漏工装安装于所述待检测位置。
上述技术方案中，气体检测装置通过检漏工装安装于待检测位置，便于气体检测装置对待检测位置稳定 地检测。
在本申请第二方面的一些实施例中，所述检漏系统还包括负压装置，所述负压装置被配置为将所述待检测位置的气体引至所述气体检测装置。
上述技术方案中，负压装置的设置能够使待检测位置的气体快速移动至气体检测装置处检测，缩短从待检测位置泄漏的气体移动至气体检测装置处的时间，从而缩短对整个箱体检漏的时间，提高检测效率。
在本申请第二方面的一些实施例中，所述气体检测装置包括气敏传感器。
上述技术方案中，气敏传感器具有能够长期稳定工作、重复性好、响应快、受共存物质(比如环境气体)的影响小等优点。
在本申请第二方面的一些实施例中，所述检漏系统还包括防护罩，所述防护罩被配置为罩设所述多个待检测位置，以使所述多个待检测位置能够向所述防护罩内泄漏示踪气体。
上述技术方案中，防护罩罩设多个待检测位置，能够营造较为清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，提高检测精度。
在本申请第二方面的一些实施例中，所述防护罩的数量为多个，所述待检测位置与所述防护罩对应设置，以使所述气体检测装置通过所述防护罩检测对应的待检测位置的泄漏率，以使待检测位置能够向对应的所述防护罩内泄漏示踪气体。
上述技术方案中，通过防护罩罩设对应的待检测位置，泄漏的示踪气体能够进入对应的防护罩内，以为对应的待检测位置营造清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，提高检测精度。
在本申请第二方面的一些实施例中，所述检漏系统还包括气体标定检测装置，所述气体标定检测装置被配置为获取所述待测箱体的标定泄漏率。
上述技术方案中，气体标定检测装置既能检测待测箱体内的示踪气体的浓度还能获取在待测箱体内的示踪气体浓度达到预设范围后的标定泄漏率，为后续检测到的各个待检测位置的泄漏率提供对比值，只有各个待检测位置的泄漏率低于标定泄漏率，待测箱体的密封等级才满足设计需求。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请实施例提供的检漏系统对待测箱体的一个待检测位置泄漏检测的第一视角示意图；
图2为本申请实施例提供的检漏系统对待测箱体的一个待检测位置泄漏检测的第二视角示意图；
图3为本申请一些实施例提供箱体的检漏方法的流程图；
图4为本申请又一些实施例提供箱体的检漏方法的流程图；
图5为本申请另一些实施例提供箱体的检漏方法的流程图；
图6为本申请一些实施例提供待测箱体的结构示意图；
图7为本申请又一些实施例提供待测箱体的结构示意图；
图8为图7待测箱体中气流方向的示意图；
图9为本申请再一些实施例提供箱体的检漏方法的流程图；
图10为本申请另一实施例提供箱体的检漏方法的流程图；
图11为本申请又一实施例提供箱体的检漏方法的流程图；
图12为本申请再一实施例提供箱体的检漏方法的流程图；
图13为本申请一些实施例提供的具有标定步骤的箱体的检漏方法的流程图；
图14为本申请另一些实施例提供的具有标定步骤的箱体的检漏方法的流程图；
图15为本申请一些实施例提供标定待测箱体一种状态的示意图；
图16为本申请一些实施例提供标定待测箱体另一种状态的示意图；
图17为本申请一些实施例提供的箱体的检漏方法的流程图；
图18为本申请又一些实施例提供的箱体的检漏方法的流程图；
图19为本申请再一些实施例提供的箱体的检漏方法的流程图；
图20为本申请另一些实施例提供的箱体的检漏方法的流程图；
图21为本申请另一些实施例提供的箱体检漏方法的流程图。
图标：100-检漏系统；10-待测箱体；11-待检测位置；12-第一箱壁；13-第二箱壁；14-充气口；15-排气口；16-第三箱壁；17-第四箱壁；20-气体检测装置；30-检漏工装；31-本体；311-吸气口；32-滚轮；33-吸气管；40-负压装置；50-气管；60-气体标定检测装置；70-标定机构；A-第一方向；B-第二方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
在本申请实施例的描述中，需要说明的是，指示方位或位置关系为基于附图所示的方位或位置关系，或者是该申请产品使用时惯常摆放的方位或位置关系，或者是本领域技术人员惯常理解的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
在本申请实施例的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“安装”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接连接，也可以通过中间媒介间接连接。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池、方形电池和软包电池，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
本申请中，箱体是由多个壳体部通过可拆卸连接或者固定连接形成的具有容纳空间的结构，箱体的容纳空间可用于容纳电池单体，当然，箱体也可以用于容纳需要密封保存的其他目标体。本申请实施例对此并不限定。容纳于箱体内的目标体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。比如，若是箱体的容纳空间内容纳的是电池单体，电池单体可呈圆柱体、扁平体、长方体或其它形状等，电池单体一般按封装的方式分成三种：柱形电池单体、方体方形电池单体和软包电池单体，本申请实施例对此也不限定。
电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、循环寿命、放电容量、充放电倍率等性能参数，另外，还需要考虑电池的安全性。
对于电池来说，箱体的密封性能是影响其充放电过程中的安全性能的重要因素。若是密封性能不能满足设计需求则使得外界环境容易对电池的箱体的内部使用环境造成影响，比如箱体密封性能不好，造成防水性能较差，水进入箱体内部造成内部短路，当发生短路、过充等现象时，可能会导致电池单体内部发生热失控从而压力或温度骤升，严重时电池单体可能爆炸、起火。
因此，需要严格把控电池的箱体的密封性能，以保证电池的箱体的密封性能满足需求。常用的手段是通对箱体进行泄漏率检测，根据泄漏率判断箱体的密封性能，泄漏率越小则说明，密封性能越好，反之，密封性能越差。
发明人发现，在电池的箱体的泄漏率检测时，采用的是整包检测，即，将箱体整体放入检测空间，再向箱体内部充入示踪气体，从箱体内泄露的示踪气体会进入待测空间内，通过检测待测空间内的示踪气体的浓度从而获得箱体的泄漏率。但是这种检测方法获得的是整个箱体的泄漏率，并不能确定箱体发生泄漏的具体位置和具体泄漏位置的泄漏率。
鉴于此，本申请实施例提供一种技术方案，通过对箱体的每个待检测位置进行泄露率检测，从而确定具体的泄漏位置和泄漏位置的泄漏率。
本申请实施例描述的技术方案适用于电池的箱体检测以及其他的需要进行泄漏检测的箱体。
以下实施例为了方便说明，以电池的箱体作为待测箱体10进行说明。
如图1、图2所示，本申请实施例提供一种检漏系统100，用于对待测箱体10的多个待检测位置11进行泄漏检测，检漏系统100包括充气装置(图中未示出)和气体检测装置20。充气装置被配置为给待测箱体10内充入示踪气体。气体检测装置20与待检测位置11对应设置，气体检测装置20被配置为检测对应的待检测位置11的泄漏率。
需要说明的是，“气体检测装置20与待检测位置11对应设置”可以理解为气体检测装置20与待检测位置11一一对应设置，待检测位置11的数量为多个，则对应的气体检测装置20的数量为与待检测位置11数量相同。“气体检测装置20与待检测位置11对应设置”还可以理解为一个待检测位置11通过一个气体检测装置20检测其泄漏率，即使气体检测装置20的数量只有一个，则通过该气体检测装置20分别检测每个待检测位置11的泄漏率。
通过气体检测装置20对待测箱体10的每个待检测位置11进行泄漏检测，不仅能够确定具体的泄漏位置，以使后续能够实现有针对性地对泄漏的位置进行防漏处理，还能检测每个待检测位置11的泄漏率，以为采取何种级别的防漏措施或者是否采取防漏措施提供依据，从而获取更为精确的泄漏信息。
示踪气体是用来检漏的一种气体，示踪气体本身具有的质量使其容易被检测或者跟踪。在与空气混合后，本身不能发生任何改变，并在很低的浓度时就能被测出。示踪气体包括氦气、二氧化碳、氨气、氢气等。
气体检测装置20可以根据示踪气体的不同进行不同选择。在一些实施例中，气体检测装置20包括气敏传感器，比如半导体气敏传感器、热电型传感器、光纤传感器、钯合金薄膜氢气传感器。气敏传感器具有能够长期稳定工作、重复性好、响应快、受共存物质(比如环境气体)的影响小等优点。
气体检测装置20实时检测示踪气体的浓度。
在一些实施例中，气体检测装置20还可以包括氦质谱检漏仪。当气体检测装置20包括氦质谱检漏仪，则用氦气或者氢气作示踪气体。氦气的本底噪声低，即检测环境是在大气中，大气中氦气的含量很少，不会影响检测精度。氦气的分子量及粘滞系数小，因而易通过漏孔并易扩散；另外，氦系惰性气体，不腐蚀设备，故常用氦作示踪气体。将氦质谱检漏仪置于待检测位置11，若有示踪气体从待检测位置11泄漏并与氦质谱检漏仪接触时，则氦质谱检漏仪即有所反应，从而可知待检测位置11是否发生泄漏及泄漏率大小。
在实际检测的过程中，若是通过气体检测装置20靠近待检测位置11进行泄漏率检测，可能因气体检测装置与待检测位置11的距离不同导致检测结果存在差异。
基于此，在一些实施例中，检漏系统100还包括多个检漏工装30，检漏工装30与待检测位置11对应设置，气体检测装置20通过检漏工装30安装于待检测位置11。由于检漏工装30的结构尺寸是恒定的，当气体检测装置20通过检漏工装30安装于待检测位置11后，气体检测装置20与待检测位置11的距离恒定，则避免因气体检测装置20与待检测位置11的距离变化从而影响泄漏检测结果。此外，气体检测装置20通过检漏工装30安装于待检测位置11，便于气体检测装置对待检测位置11稳定地检测。
示例性地，如图1、图2所示，待测箱体10的一个待检测位置11为条形密封位置，密封位置具有一定的长度，该密封位置对应的检漏工装30包括本体31和两个滚轮32，滚轮32可转动地设于本体31，本体31上设有吸气口311，两个滚轮32之间设有吸气管33，两个滚轮32限定出吸气位置，吸气管33与吸气口311连通，气体检测装置20安装于检漏工装30并通过吸气口311与吸气管33连通，从待检测位置11泄漏的气体能够经吸气管33和吸气口311到达气体检测装置20处。滚轮32与密封位置的密封界面接触，滚轮32转动能够带动检漏工装30沿密封界面移动从而改变吸气管33对应的位置。检漏工装30使得密封界面与气体检测装置的距离保持恒定。
在一些实施例中，检漏工装30也可以是仿形罩，通过将仿形罩罩设于待检测位置，待检测位置泄漏的示踪气体进入仿形罩，并经过仿形罩上的出口到达气体检测装置20处。仿形罩是与待检测位置的结构相匹配的结构，比如待检测位置为螺栓连接位置，则仿形罩的内部为与螺母和垫片的外形匹配的腔体，再比如，待检测位置为泄压机构的连接位置，则仿形罩的内部为与泄压机构的外形匹配的腔体。
在一些实施例中，检漏系统100还包括负压装置40，负压装置40被配置为将待检测位置11的气体引至气体检测装置20。
如图1、图2所示，负压装置40连接于气体检测装置20背离检漏工装30的一侧，即气体检测装置20的下游。负压装置从吸气口311将待检测位置11处的气体以负压的形式吸至气体检测装置20处，以使气体检测装置20能够检测从对应的待检测位置11处泄漏的示踪气体的浓度。负压装置40的设置能够使待检测位置11的气体快速移动至气体检测装置20处检测，缩短从待检测位置11泄漏的气体移动至气体检测装置20处的时间，从而缩短对整个箱体检漏的时间，提高检测效率。
根据待检测位置11的形状、结构等不同，对应的检漏工装30的结构可以不同。
在一些实施例中，检漏系统还包括气体标定检测装置(图1、图2中未示出)，气体标定检测装置被配置为获取待测箱体10的标定泄漏率。
气体标定检测装置既能检测待测箱体10内的示踪气体的浓度还能在待测箱体10内的示踪气体浓度达到预设范围后的标定泄漏率，为后续检测到的各个待检测位置11的泄漏率提供对比值，只有各个待检测位置11的泄漏率低于标定泄漏率，待测箱体10的密封等级才满足设计需求，即待测箱体的密封合格。
其中，气体标定检测装置与气体检测装置20可以是同一个检测装置，该检测装置先作为气体标定检测装置检测待测箱体10内的示踪气体的浓度并在待测箱体10内的示踪气体浓度达到预设范围后获取待测箱体10的标定泄漏率，获取待测箱体10的标定泄漏率后，再作为气体检测装置检测各个待检测位置的泄漏率，再将各个待检测位置11的泄漏率与在先获得的标定泄漏率进行对比。
在一些实施例中，气体标定检测装置与气体检测装置20可以是各自独立的检测装置。
为了避免外界环境气流对检测结果的影响。在一些实施例中，所述检漏系统还包括防护罩(图中未示出)，防护罩被配置为罩设多个待检测位置11，以使多个待检测位置11能够向防护罩内泄漏示踪气体。通过防护罩罩设多个待检测位置11，能够营造较为清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，提高检测精度。
在一些实施例中，防护罩为一个，将待测箱体10整体放入防护罩内，各个待检测位置11能够向防护罩内泄漏示踪气体，气体检测装置20在防护罩内检测对应的待检测位置11的泄漏率。
在另一些实施例中，气体检测装置设置于防护罩外，通过将对应的待检测位置11处的气体通过负压装置引导至防护罩外的气体检测装置，气体检测装置在防护罩外对对应的待检测位置11泄漏的示踪气体的浓度进行检测。
在一些实施例中，防护罩的数量为多个，待检测位置11与防护罩对应设置，待检测位置11的数量和防护罩的数量相同，以使气体检测装置20通过防护罩检测对应的待检测位置11的泄漏率，以使待检测位置11能够向对应的所述防护罩内泄漏示踪气体。通过防护罩罩设对应的待检测位置11，泄漏的示踪气体能够进入对应的防护罩内，以为对应的待检测位置11营造清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，还能避免各个待检测位置11处泄漏的示踪气体相互干扰，进一步提高检测精度。
如图3所示，本申请实施例还提供一种箱体的检漏方法，待测箱体10具有多个待检测位置11，该箱体的检漏方法包括：
步骤S100，向待测箱体10内充入示踪气体；
步骤S200，检测各个待检测位置11的泄漏率。
通过对待测箱体10的每个待检测位置11进行泄漏检测，不仅能够确定具体的泄漏位置，以使后续能够实现有针对性地对泄漏的位置进行防漏处理，还能检测每个待检测位置11的泄漏率，提高箱体的泄漏检测的精度，同时以为采取何种级别的防漏措施或者是否采取防漏措施提供依据。
为了能够向待测箱体10内部充入示踪气体并使得待测箱体10内部的示踪气体浓度能够达到预设范围，则需要排出待测箱体10内部原本存在的气体，以为示踪气体让出空间。由于待测箱体10耐负压能力有限，若是采用先对待测箱体10抽绝对真空再充入示踪气体的方法，容易损坏待测箱体10。此外，如果只单独往待测箱体10内充入示踪气体，受待测箱体10耐压能力限制，则向待测箱体10内充入的示踪气体的量有限，很难提高示踪气体浓度，难以达到气体检测装置20对检测浓度的需求(示踪气体浓度越低，气体检测装置的测试结果精度越低)。因此，如图4所示，在一些实施例中，箱体的检漏方法还包括：
步骤S300，在向所述待测箱体10内充入示踪气体的过程中，引出所述待测箱体10内的气体。
向待测箱体10内充入示踪气体的过程中，引出待测箱体10内原本存在的气体，能够为示踪气体让出空间，以使待测箱体10内的示踪气体的浓度能够达到预设范围，避免待测箱体10内部呈负压。并且充入示踪气体和排出待测箱体10内原本存在的气体同时进行，还能加速示踪气体在待测箱体10内扩散。
若是仅仅向待测箱体10内冲入示踪气体，需要静置很长世间才能使示踪气体在箱体内扩散均匀，特别是远离充气端的位置示踪气体浓度会很低。因此，如图5所示，在一些实施例中，步骤S300包括：
步骤S310，从待测箱体10的第一端向待测箱体10内充入示踪气体的过程中，从待测箱体10的与第一端相对的第二端引出待测箱体10内的气体。
待测箱体10的第一端和第二端相对布置，待测箱体10的第一端设有用于向待测箱体10内充入示踪气体的充气口14，在待测箱体10的第二端设于用于排出箱体内部的气体的排气口15。当从充气口14向待测箱体10内充入示踪气体的过程中，待测箱体10内的示踪气体逐渐增多，待测箱体10内原本存在的气体将从排气口15排出，以为示踪气体让出空间，以使待测箱体10内的示踪气体的浓度能够达到预设范围。此外从待测箱体10相对布置的一端充气另一端排气的置换方法，可以形成固定的气体流向，示踪气体在气流的带动下快速扩散至待测箱体10的内部的各个部位，大大提高效率，以快速的使待测箱体10内的示踪气体的浓度趋于一致。
通过排出待测箱体10内的空气，能充入更多的示踪气体，可以按照需求提高待测箱体10内部的示踪气体浓度，使气体检测装置达到更好的测试效果。每个充气通道和排气通道都配备调压阀和电磁阀，可灵活调节压力参数和时间。
需要说明的是，“待测箱体10的第一端和第二端相对布置”可以理解为待测箱体10的第一端和第二端分别为待测箱体10沿第一方向A相对布置的第一箱壁12和第二箱壁13，充气口14设置于第一侧面，排气口15设置于第二侧面。充气口14的中心轴线和排气口15的中心轴线平行或者呈夹角布置。
示例性地，如图6所示，充气口14设置于第一箱壁12，排气口15设置于第二箱壁13。充气口14的中心轴线和排气口15的中心轴线平行，示踪气体沿图中实心箭头的方向扩散，待测箱体10内部原本的气体沿图中空心箭头的方向移动。
如图7所示，待测箱体10还具有沿第二方向B相对布置的第三箱壁16和第四箱壁17，第一方向A和第二方向B垂直，充气口14设于第一侧壁，排气口15设于第三侧壁并靠近第二侧壁，此时第一端和第二端是大致相对布置。如图8所示，根据气流的流动原理，待测箱体10内部原本存在的气体从排气口15排出的过程中，即图中空心箭头所示出的方向，示踪气体能够沿第一方向A和第二方向B在待测箱体10内部快速扩散，能够进一步加快扩散速率，且能够使示踪气体快速充满整个待测箱体10内部，以使待测箱体10内的示踪气体的浓度趋于一致。
如图9所示，在一些实施例中，步骤S300还包括：
步骤S320，执行向待测箱体10内充入示踪气体的过程中，引出待测箱体10内的气体一段时间后，停止引出待测箱体10内的气体并持续向待测箱体10内充入示踪气体。
当进行箱体泄漏检测时，需要待测箱体10内部保持一定的压力，以满足检测需求。此外，若是待测箱体10没有泄漏率较大的位置，向待测箱体10内充入示踪气体，在一定的时间段内，待测箱体10内部的压力会处于某一预设范围内。因此，如图10所示，在一些实施例中，箱体的检漏方法还包括：
步骤S400，获取所述待测箱体10在第一时刻与第二时刻的压力差，以判断压力差是否超出预设范围。
若是在第一时刻至第二时刻的时间段内，待测箱体10的内部压力超出预设范围则说明待测箱体10存在具有较大泄漏率的泄漏位置，该泄漏位置使得在向待测箱体10内的充入示踪气体时，待测箱体10内的压力始终不能达到预设范围，难以满足检测需求，且会在检测环境中排放大量的示踪气体，影响检测结果，需要对待测箱体返修。因此，检测待测箱体10是否具有较大泄漏率泄漏的泄漏位置很有必要。
在一些实施例中，在执行了步骤S400后，执行步骤S100，避免待测箱体10存在泄漏率较大的位置，造成示踪气体从泄漏率较大的位置泄漏影响气体检测装置20的检测结果和污染环境。
在一些实施例中，也可以在步骤S100之前通过抽真空的方式实现，以检测待测箱体10是否存在泄漏率较大的位置。若是没有泄漏率较大的位置，当对待测箱体10抽真空达到一段时间后，比如抽真空的时间段为第一时刻至第二时刻，第一时刻时待测箱体10内部的压力与第二时刻时待测箱体10内部的压力的差值在预定范围之内。若是有泄漏率较大的位置，第一时刻待测箱体10内部的压力与第二时刻待测箱体10内部的压力的差值会超出预定范围。通过抽真空的方式检测待测箱体10是否存在大泄漏率位置，能够在待测箱体10内形成负压，在向待测箱体10内充入示踪气体的过程中，示踪气体在待测箱体10内的扩散速率会大大提高。在通过抽真空的方式检测待测箱体10是否存在大泄漏率位置的过程中，待测箱体10内的负压不能超过待测箱体10的负压承受能力。
如图11所示，在一些实施例中，箱体的检漏方法还包括：
步骤S500，检测待测箱体10内的示踪气体的浓度，当浓度达到预设范围后，检测各个待检测位置11的示踪气体浓度，以得到各个待检测位置11的泄漏率。
当待测箱体10内的示踪气体浓度达到预设范围后，检测各个待检测位置11的泄漏率，以使待测箱体内的示踪气体浓度达到检测条件，消除待测箱体10内示踪气体浓度差异造成泄漏检测差异。
在一些实施例中，向待测箱体充入预定时间的示踪气体后，获取待测箱体内的示踪气体浓度，判断示踪气体浓度是否在预设范围。当向待测箱体10内充入示踪气体的达到预定时间段后，则开始检测待测箱体内的示踪气体浓度，不需要实时或者多次检测待测箱体10内的示踪气体浓度，提高检测效率。
如图12所示，在一些实施例中，步骤S500包括：
步骤S510，将待测箱体10内的气体引至气体标定检测装置60处，通过气体标定检测装置60检测待测箱体10内的气体中的示踪气体的浓度。
将待测箱体10内的气体引至气体检测装置20处后进行示踪气体浓度检测，便于示踪气体浓度检测的进行，并且使得气体检测装置20和待测箱体10的相对位置关系可以更加灵活。
如图13所示，在一些实施例中，箱体的检漏方法还包括：
步骤S520，当待测箱体10内的示踪气体浓度达到预设范围后，获取待测箱体10的标定泄漏率。
通过获取待测箱体10内的示踪气体浓度达到预设范围后的标定泄漏率，为后续检测到的各个待检测位置11的泄漏率提供对比值，只有各个待检测位置11的泄漏率低于标定泄漏率，待测箱体10的密封等级才满足设计需求。
在一些实施例中，步骤S510和步骤S520也可以看做是同一个步骤，即在步骤S510测得待测箱体10内的示踪气体的浓度在预设范围，则通过换算能够得到标定泄漏率。
如图14所示，在一些实施例中，步骤S520包括：
步骤S521，将待测箱体10内的气体经标定机构70引出到气体标定检测装置60处，获取待测箱体的标定泄露率。不仅方便获取待测箱体10的标定泄漏率，还能够提高获取标定泄漏率的准确度。
其中，在一些实施例中，箱体的检漏方法还包括：获取所述待检测位置的标定泄露率。获取待测位置的标定泄漏率后，将待检测位置的泄漏率与对应的标定泄漏率对比后，若是待检测位置的泄漏率低于标定泄漏率，则待检测位置的密封设计满足需求。以保证每个待检测位置的密封满足设计需求。
具体而言，获取所述待检测位置的标定泄露率包括：将待测箱体10内的气体经标定机构70引出到气体标定检测装置60处，当待测箱体10内的示踪气体浓度达到预设范围后，获取待检测位置11的标定泄露率。
如图15所示，将待测箱体10内的气体经标定机构70引出到气体标定检测装置60处，获取待测箱体10的标定泄露率，这一过程被称为标定。其中标定机构70为具备标准泄漏孔的机构，标定机构70可以根据对应的待检测位置11做的仿形装置，该仿形装置设置有标准漏孔。示踪气体经过标定机构70后，检测得到的气体浓度为标准浓度，在后续检测待检测位置11的泄露率时，将待检测位置11检测得到的示踪气体浓度与标准浓度比较，即可得到对应待测位置是否满足密封要求，且可通过示踪气体浓度换算得到泄露率。通过此方法可以实现每次泄漏检测都能独立标定，能避免待测箱体10内因示踪气体浓度的差异导致的测试差异。
在S400步骤中，可以采用从待测箱体10排气口15取气通过气管50连接至各个待检测位置11对应的气体标定检测装置60处，具体可以是气管50经每个待检测位置11对应的标定机构70连接于气体标定检测装置60，可通过气体标定检测装置60测量得到的气体浓度，换算得到待测箱体10内的示踪气体的浓度。且当待测箱体10内的示踪气体的浓度达到预设范围后，气体标定检测装置60还能够获得待测箱体10的标定泄漏率。通过此方法可以将待测箱体10内的气体浓度控制在标准泄露率对应气体浓度在可测范围内，提高测试准确度。除此之外，通过控制示踪气体浓度的范围，能实现对气体检测装置20测试回路的实时监控，及时发现检漏系统异常，避免质量风险。
如图15所示，多个标定机构70通过同一个气管50连通，不仅能够从同一处取气(比如均从排气口15取气)，减少取气位置的数量，还能同时对多个位置进行标定，提高标定效率。
请参照图15、图16，在一些实施例中，气体标定检测装置60和气体检测装置20为同一个检测装置。每个待检测位置11对应设置标定机构70，每个待检测位置11对应设置有检漏工装30，每个标定机构70对应设置气体标定检测装置60(气体检测装置20)，每个标定机构70与排气口15(或者充气口14)通过气管50连通，气体标定检测装置60(气体检测装置20)能够与标定机构70和与之对应的检漏工装30的吸气口311连通。
如图15所示，当进行标定过程时，使气体标定检测装置60(气体检测装置20)和检漏工装30的吸气口311断开，气体标定检测装置60(气体检测装置20)和标定机构70连通。待测箱体10内的气体从排气口15经过气管50和标定机构70最终到达气体标定检测装置60(气体检测装置20)，最终通过气体标定检测装置60(气体检测装置20)测得的示踪气体的浓度获得待测箱体10的标定泄漏率。
如图16所示，当对待检测位置11进行泄漏检测时，对应的待检测位置的气体标定检测装置60(气体检测装置20)和检漏工装30的吸气口311连通，气体标定检测装置60(气体检测装置20)和标定机构70断开，待测箱体10内的气体从待检测位置11泄漏并通过对应的检漏工装30最终到达气体标定检测装置60(气体检测装置20)，最终获得对应的待检测位置11的泄露率，并与标定泄漏率对比，若是待检测位置11的泄露率低于标定泄漏率，则对应的待检测位置11的密封满足设计需求。
在一些实施例中，也可以是先通过气体标定检测装置60(气体检测装置20)与对应的待检测位置11的标定机构70连接获得标定泄漏率，然后将该气体标定检测装置60(气体检测装置20)移动至对应的待检测位置11 所对应的检漏工装30处进行待检测位置11的泄漏率检测。
在一些实施例中，气体标定检测装置60和气体检测装置20为同一个检测装置，且气体标定检测装置60(气体检测装置20)的数量为一个，气体标定检测装置60(气体检测装置20)依次在每个待检测位置11获取对应位置的标定泄漏率和对该待检测位置11进行泄露率检测。
在一些实施例中，气体标定检测装置60和气体检测装置20为各自独立的检测装置，气体标定检测装置60与对应的待检测位置11的标定机构70连通用于获取对应待检测位置11的标定泄漏率，气体检测装置20与对应的待检测位置11的检漏工装30的吸气口311连通用于对该待检测位置11进行泄露率检测。如图17所示，在一些实施例中，箱体的检漏方法还包括：
步骤S600，在检测各个待检测位置11的泄漏率之后，引出待测箱体10内的示踪气体。
待测箱体10泄漏检测完成后，引出待测箱体10内的示踪气体，避免示踪气体污染待测箱体10内部环境，影响电池单体的电池性能。
如图18所示，在一些实施例中，箱体的检漏方法还包括：
步骤S700，在向待测箱体10内充入示踪气体之前，通过防护罩将多个待检测位置11罩设，以使多个待检测位置11能够向防护罩内泄漏示踪气体。过防护罩将多个待检测位置11罩设，能够营造较为清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，提高检测精度。
为避免各个待检测位置11泄漏的示踪气体相互干扰而影响泄漏检测结果。如图19所示，在一些实施例中，步骤S700包括：
步骤S710，通过多个防护罩将多个待检测位置11对应罩设，使待检测位置11能够向对应的防护罩内泄漏示踪气体。
通过防护罩罩设对应的待检测位置11，泄漏的示踪气体能够进入对应的防护罩内，以为对应的待检测位置11营造清洁、稳定的检测环境，将外部气流对检测结果的影响降到最低，提高检测精度。
由于电池的箱体一般设有泄压机构，泄压机构用于在箱体内部的压力或者温度达到阈值时致动，以泄放箱体内部的压力。泄压机构可以采用诸如防爆阀、防爆片、气阀、泄压阀或安全阀等的形式，并可以具体采用压敏或温敏的元件或构造，即，当电池的内部压力或温度达到预定阈值时，泄压机构执行动作或者泄压机构中设有的薄弱结构被破坏，从而形成可供内部压力或温度泄放的开口或通道。其中，“致动”是指泄压机构产生动作或被激活至一定的状态，从而使得电池的内部压力及温度得以被泄放。泄压机构产生的动作可以包括但不限于：泄压机构中的至少一部分破裂、破碎、被撕裂或者打开，等等。泄压机构在致动时，电池的内部的高温高压物质作为排放物会从致动的部位向外排出。以此方式能够在可控压力或温度的情况下使电池单体发生泄压及泄温，从而避免潜在的更严重的事故发生。
因此，如图20所示，在一些实施例中，箱体的检漏方法还包括：
步骤S800，在向待测箱体10内充入示踪气体之前，将待测箱体10上的泄压机构抵紧，以阻止待测箱体10内的压力达到阈值时泄压机构致动。避免泄压机构成为泄漏位置之一，影响对待测箱体10的待检测位置11的泄漏率检测的准确性。
由于电池的箱体还具有其他的密封性能要求较低的位置，比如用于安装连接器(用于将电池内部的电能引出)的位置。在向待测箱体10内充入示踪气体之前，将用于安装连接器的位置封堵，避免安装连接器的位置泄漏示踪气体而影响检测结果。
在进行泄漏检测之前，若是气体检测装置20所处的环境本身就具有并非来自待检测位置11泄漏的示踪气体，则会对气体检测装置20检测到的从待检测位置11泄漏的示踪气体的浓度的结果产生影响，使得检测得到的泄漏率偏高。因此，如图21所示，在一些实施例中，箱体的检漏方法还包括：
步骤S900，在向待测箱体10内充入示踪气体之前，检测气体检测装置20所处的环境的示踪气体的浓度。避免气体检测装置20所处的环境存在本底示踪气体，造成气体检测装置20所检测的示踪气体浓度偏高，从而使得对应的待检测位置11的泄漏率偏高。
在检测气体检测装置20所处环境的示踪气体浓度时，可以采用多路气体检测装置20并行测试，测试点已经提前布置在对应的待测试环境，在开始排出待测箱体10内的气体时启动气体检测装置20即可实现对环境中示踪气体浓度的监测，能有效的监测气体检测装置20所处环境的本底示踪气体浓度，避免因本底浓度过大导致测试值偏大。若是在开始检测待检测位置11的泄漏率时，已经检测出气体检测装置20所处的环境存在示踪气体，则可以搭配排风系统，及时清除逸散的示踪气体。
需要说明的是，检测气体检测装置20(用于检测待检测位置11泄漏的示踪气体的浓度的气体检测装置20)所处的环境的示踪气体的浓度可以通过单独的检测装置检测，也可以是用即将放入该环境的机器检测装置检测。
步骤S900、步骤S700(或者步骤S710)、步骤S800的执行顺序本申请不作限定。比如，先执行步骤S900、再执行步骤S700(或者步骤S710)、再执行步骤S800；或者先执行步骤S800、再执行步骤S700(或者步骤S710)、再执行步骤S900；或者先执行步骤S700(或者步骤S710)、再执行步骤S800、再执行S900。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (19)

  1. 一种箱体的检漏方法，其中，包括：
    向待测箱体内充入示踪气体，所述待测箱体具有多个待检测位置；
    检测各个待检测位置的泄漏率。
  2. 根据权利要求1所述的箱体的检漏方法，其中，所述箱体的检漏方法还包括：
    检测所述待测箱体内的示踪气体的浓度，当所述浓度达到预设范围后，检测各个待检测位置的示踪气体浓度，以得到各个待检测位置的泄漏率。
  3. 根据权利要求2所述的箱体的检漏方法，其中，所述检测所述待测箱体内的示踪气体的浓度包括：
    将所述待测箱体内的气体引至气体标定检测装置处，通过所述气体标定检测装置检测所述待测箱体内的气体中的示踪气体的浓度。
  4. 根据权利要求2或3所述的箱体的检漏方法，其中，所述箱体的检漏方法还包括：
    向所述待测箱体充入预定时间的示踪气体后，获取所述待测箱体内的示踪气体浓度，判断示踪气体浓度是否在预设范围。
  5. 根据权利要求1-4任一项所述的箱体的检漏方法，其中，所述箱体的检漏方法还包括：
    获取所述待检测位置的标定泄露率。
  6. 根据权利要求5所述的箱体的检漏方法，其中，所述获取所述待检测位置的标定泄露率包括：
    将所述待测箱体内的气体经标定机构引出到气体标定检测装置处，当所述待测箱体内的示踪气体浓度达到预设范围后，获取待检测位置的标定泄露率。
  7. 根据权利要求1-6任一项所述的箱体的检漏方法，其中，所述箱体的检漏方法还包括：
    在向所述待测箱体内充入示踪气体的过程中，引出所述待测箱体内的气体。
  8. 根据权利要求7所述的箱体的检漏方法，其中，所述在向待测箱体内充入示踪气体的过程中，引出所述待测箱体内的气体包括：
    从所述待测箱体的第一端向所述待测箱体内充入示踪气体的过程中，从所述待测箱体的与所述第一端相对的第二端引出所述待测箱体内的气体。
  9. 根据权利要求1-8任一项所述的箱体的检漏方法，其中，所述箱体的检漏方法还包括：
    获取所述待测箱体在第一时刻与第二时刻的压力差，以判断所述压力差是否超出预设范围。
  10. 根据权利要求1-9任一项所述的箱体的检漏方法，其中，所述箱体的检漏方法还包括：
    在所述检测各个待检测位置的泄漏率之后，引出所述待测箱体内的示踪气体。
  11. 根据权利要求1-10任一项所述的箱体的检漏方法，其中，所述箱体的检漏方法还包括：
    在所述向待测箱体内充入示踪气体之前，通过防护罩将所述多个待检测位置罩设，以使所述多个待检测位置能够向所述防护罩内泄漏示踪气体。
  12. 根据权利要求11所述的箱体的检漏方法，其中，所述通过防护罩将所述多个待检测位置罩设，以使所述多个待检测位置能够向所述防护罩内泄漏示踪气体包括：
    通过多个所述防护罩将所述多个待检测位置对应罩设，使待检测位置能够向对应的所述防护罩内泄漏示踪气体。
  13. 一种检漏系统，其中，用于对待测箱体的多个待检测位置进行泄漏检测，所述检漏系统包括：
    充气装置，被配置为给所述待测箱体内充入示踪气体；
    气体检测装置，所述气体检测装置与所述待检测位置对应设置，所述气体检测装置被配置为检测对应的待检测位置的泄漏率。
  14. 根据权利要求13所述的检漏系统，其中，所述检漏系统还包括多个检漏工装，所述检漏工装与所述待检测位置对应设置，所述气体检测装置通过所述检漏工装安装于所述待检测位置。
  15. 根据权利要求13或14所述的检漏系统，其中，所述检漏系统还包括负压装置，所述负压装置被配置为将所述待检测位置的气体引至所述气体检测装置。
  16. 根据权利要求13-15任一项所述的检漏系统，其中，所述气体检测装置包括气敏传感器。
  17. 根据权利要求13-16任一项所述的检漏系统，其中，所述检漏系统还包括防护罩，所述防护罩被配置为罩设所述多个待检测位置，以使所述多个待检测位置能够向所述防护罩内泄漏示踪气体。
  18. 根据权利要求17所述的检漏系统，其中，所述防护罩的数量为多个，所述待检测位置与所述防护罩对应设置，以使所述气体检测装置通过所述防护罩检测对应的待检测位置的泄漏率，以使待检测位置能够向对应的所述防护罩内泄漏示踪气体。
  19. 根据权利要求13-18任一项所述的检漏系统，其中，所述检漏系统还包括气体标定检测装置，所述标定检测装置被配置为获取所述待测箱体的标定泄漏率。
PCT/CN2022/081242 2021-04-30 2022-03-16 箱体的检漏方法及检漏系统 WO2022227907A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020227033508A KR102695251B1 (ko) 2021-04-30 2022-03-16 박스 바디의 누출 감지 방법 및 누출 감지 시스템
EP22772398.8A EP4116691A4 (en) 2021-04-30 2022-03-16 Leakage detection method and leakage detection system for box
JP2022558555A JP7398010B2 (ja) 2021-04-30 2022-03-16 筐体の漏洩検知方法及び漏洩検知システム
US18/122,792 US12259297B2 (en) 2021-04-30 2023-03-17 Method for box leak detection and leak detection system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110488231.1 2021-04-30
CN202110488231.1A CN115265935A (zh) 2021-04-30 2021-04-30 箱体的检漏方法及检漏系统

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/122,792 Continuation US12259297B2 (en) 2021-04-30 2023-03-17 Method for box leak detection and leak detection system

Publications (1)

Publication Number Publication Date
WO2022227907A1 true WO2022227907A1 (zh) 2022-11-03

Family

ID=83745830

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/081242 WO2022227907A1 (zh) 2021-04-30 2022-03-16 箱体的检漏方法及检漏系统

Country Status (6)

Country Link
US (1) US12259297B2 (zh)
EP (1) EP4116691A4 (zh)
JP (1) JP7398010B2 (zh)
KR (1) KR102695251B1 (zh)
CN (1) CN115265935A (zh)
WO (1) WO2022227907A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116448336A (zh) * 2023-03-16 2023-07-18 中国辐射防护研究院 一种示踪气体注入泄漏量检测方法及系统
CN117168712A (zh) * 2023-11-03 2023-12-05 宁德时代新能源科技股份有限公司 检测组件、检测设备及其检测方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116358796B (zh) * 2023-05-18 2023-08-01 天津博益气动股份有限公司 新能源动力电池箱体的检漏方法及检漏系统
CN117091765A (zh) * 2023-10-18 2023-11-21 宁德时代新能源科技股份有限公司 气密检测系统及电池制造生产线
CN118150067A (zh) * 2024-05-11 2024-06-07 宁德时代新能源科技股份有限公司 电池测试系统及电池测试方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6289722B1 (en) * 1999-07-06 2001-09-18 Visteon Global Tehnologies, Inc. Helium leak tester for vehicle fuel tanks
US20120048001A1 (en) * 2010-08-31 2012-03-01 Richard Allan Pawlyk Method of testing for leaks in a contained system
CN105987796A (zh) * 2015-02-12 2016-10-05 广州市和晋自动化控制技术有限公司 一种气体浓度探测方法及装置
CN109323814A (zh) * 2017-07-31 2019-02-12 深圳市远望工业自动化设备有限公司 具有分级充气机构的质谱检漏设备及质谱检漏方法
CN112098008A (zh) * 2020-08-25 2020-12-18 广东鸿图科技股份有限公司 一种用于工件气密性检测的装置

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57169649A (en) * 1981-04-13 1982-10-19 Mitsubishi Heavy Ind Ltd Jetting apparatus of carbon spark
JPH0210430Y2 (zh) * 1984-12-21 1990-03-15
JPH10281915A (ja) * 1997-04-01 1998-10-23 Tokyo Gas Co Ltd 二重配管における内管からの漏洩位置を特定する方法
JP4153825B2 (ja) 2003-05-19 2008-09-24 三菱重工業株式会社 漏れ検査装置および該漏れ検査装置の制御方法
JP2005207994A (ja) 2004-01-26 2005-08-04 Calsonic Kansei Corp 内部リーク検査方法
US7178385B2 (en) * 2004-06-18 2007-02-20 Cincinnati Test Systems, Inc. Method and apparatus for detecting leaks
DE102006017958A1 (de) 2006-04-13 2007-10-25 Volker Dahm Verfahren und Vorrichtung zur Bestimmung der Dichtigkeit eines Prüfobjektes
JP2008241265A (ja) * 2007-03-23 2008-10-09 Sumitomo Electric Ind Ltd 気密試験方法および気密試験用捕集容器
JP2012251849A (ja) 2011-06-02 2012-12-20 Fukuda:Kk リークテスト装置及び方法
CN205067031U (zh) * 2015-09-23 2016-03-02 梅晨 一种车辆泄漏综合检测工具
CN109313100B (zh) 2016-06-30 2021-12-21 株式会社开滋 阀用耐压检查装置和其检查方法、以及氢气检测单元
JP6782003B2 (ja) 2016-07-14 2020-11-11 ヤマハファインテック株式会社 リークテスタ及びリークテスト方法
JP6831563B2 (ja) 2017-02-07 2021-02-17 ヤマハファインテック株式会社 ガスセンサアレイ及びガス漏れ検知装置
FR3068781A1 (fr) * 2017-07-06 2019-01-11 Ateq Procede de detection de fuite d'une piece creuse et installation pour la mise en œuvre d'un tel procede
CN109425469B (zh) * 2017-08-21 2024-05-10 宁德时代新能源科技股份有限公司 电池模组以及电池模组气密性检测方法
CN207215391U (zh) * 2017-08-23 2018-04-10 上海蔚兰动力科技有限公司 测漏系统
CN108225685B (zh) * 2017-12-27 2019-12-03 北京临近空间飞艇技术开发有限公司 一种气体泄漏检测装置及其检测方法
JP2020106456A (ja) 2018-12-28 2020-07-09 株式会社キッツ サーチガスの混合方法
CN110426158A (zh) * 2019-07-10 2019-11-08 恒大新能源科技集团有限公司 一种电池包箱体气密性的检测方法
CN112213045B (zh) 2019-07-12 2025-05-27 西安核设备有限公司 换热器单管氦检漏充氦装置及检测方法
CN110849560A (zh) * 2019-11-29 2020-02-28 格力电器（武汉）有限公司 一种水箱内胆检漏系统及方法
CN111912577A (zh) * 2020-08-18 2020-11-10 广州小鹏汽车科技有限公司 一种检测方法和装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6289722B1 (en) * 1999-07-06 2001-09-18 Visteon Global Tehnologies, Inc. Helium leak tester for vehicle fuel tanks
US20120048001A1 (en) * 2010-08-31 2012-03-01 Richard Allan Pawlyk Method of testing for leaks in a contained system
CN105987796A (zh) * 2015-02-12 2016-10-05 广州市和晋自动化控制技术有限公司 一种气体浓度探测方法及装置
CN109323814A (zh) * 2017-07-31 2019-02-12 深圳市远望工业自动化设备有限公司 具有分级充气机构的质谱检漏设备及质谱检漏方法
CN112098008A (zh) * 2020-08-25 2020-12-18 广东鸿图科技股份有限公司 一种用于工件气密性检测的装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4116691A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116448336A (zh) * 2023-03-16 2023-07-18 中国辐射防护研究院 一种示踪气体注入泄漏量检测方法及系统
CN117168712A (zh) * 2023-11-03 2023-12-05 宁德时代新能源科技股份有限公司 检测组件、检测设备及其检测方法
CN117168712B (zh) * 2023-11-03 2024-04-02 宁德时代新能源科技股份有限公司 检测组件、检测设备及其检测方法

Also Published As

Publication number Publication date
EP4116691A1 (en) 2023-01-11
JP2023526886A (ja) 2023-06-26
KR102695251B1 (ko) 2024-08-13
KR20220149777A (ko) 2022-11-08
EP4116691A4 (en) 2023-10-25
CN115265935A (zh) 2022-11-01
JP7398010B2 (ja) 2023-12-13
US20230221205A1 (en) 2023-07-13
US12259297B2 (en) 2025-03-25

Similar Documents

Publication Publication Date Title
WO2022227907A1 (zh) 箱体的检漏方法及检漏系统
KR101198857B1 (ko) 이차전지의 리크 검사장치
EP1130668B1 (en) Battery sealing inspection method
US20040134259A1 (en) Method for leak testing of electrochemical elements
CN204461695U (zh) 一种供气装置及锂电池泄漏检测系统
KR20180028472A (ko) 센서 유닛 및 기밀성 검사 장치
KR101756153B1 (ko) 파우치형 2차 전지의 시험 장치
JP7165303B2 (ja) 電池パックのリーク検査方法およびリーク検査装置
CN110132507A (zh) 电池密封性检测装置以及电池密封性检测方法
CN217687700U (zh) 密封性测试装置及密封性测试系统
JP4091367B2 (ja) リーク検査方法
US20230003602A1 (en) Battery pack leakage detection system and detection method based on tracer gas cumulative test
CN220322645U (zh) 一种密封性测试系统
CN115541145A (zh) 软包电池气密性检测装置及检测方法
CN112362247B (zh) 一种锂离子电池组电解液泄漏检测装置及方法
CN117091772A (zh) 气密性检测方法及气密性检测系统
CN212254469U (zh) 一种差压式气密仪校准装置
JP3983479B2 (ja) 電池の液漏れ検査装置
CN220437687U (zh) 一种用于检测气密性的设备
CN217716830U (zh) 一种新能源电池包气密性检测装置
CN115993215B (zh) 充气装置、气密测试装置、充气方法及气密测试方法
CN215178461U (zh) 软包电池气密性检测装置
CN209979183U (zh) 电池密封性检测装置
CN115127736A (zh) 密封性测试装置及密封性测试系统
CN106052976A (zh) 电池箱密封检测装置及方法

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2022558555

Country of ref document: JP

Kind code of ref document: A

Ref document number: 20227033508

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2022772398

Country of ref document: EP

Effective date: 20220926

NENP Non-entry into the national phase

Ref country code: DE