CN115406594A - Airtightness detection control method, controller, detection system, and storage medium - Google Patents
Airtightness detection control method, controller, detection system, and storage medium Download PDFInfo
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- 238000004891 communication Methods 0.000 description 25
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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
- G01M3/04—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
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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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Abstract
The embodiment of the invention provides an air tightness detection control method, a controller, a detection system and a storage medium, wherein the air tightness detection control method applied to the controller of the helium detection system at least comprises the following steps: receiving a detection mode instruction; determining a target detection mode according to the detection mode instruction; and carrying out large leakage detection and/or small leakage detection on the detection object according to the target detection mode, wherein the large leakage detection characteristic is used for carrying out vacuum-pumping air pressure detection on the detection object, and the small leakage detection characteristic is used for carrying out gas concentration detection on the detection object. In the technical scheme of the embodiment, on the basis of not changing the structure of the air tightness detection system, the switching of the detection modes can be realized through the controller, the compatibility of different detection modes is realized, the efficiency of program design and the program compatibility are improved, and the field debugging requirement of the air tightness detection system is met.
Description
Technical Field
The embodiment of the invention relates to the field of automation, in particular to an air tightness detection control method, a controller, a detection system and a storage medium.
Background
At present, in the air tightness detection process, due to the difference of the number of cavities, the difference of detection stages or the difference of detection requirements, the process requirements of different production conditions need to be met by designing corresponding structures and control programs, but the air tightness detection process involves more flows, for example, the design processes of helium detection process, software, programs and the like are more complicated, the structures of air tightness detection systems are different due to the different number of cavities or the different detection stages or requirements, so that the designs of the software, the programs and the like are different, and the software and the programs of different design ideas are different, which is not favorable for the requirements of field debugging work.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention mainly aims to provide an air tightness detection control method, a controller, a detection system and a storage medium, which can be suitable for different air tightness detection systems, realize the compatibility of different detection modes, improve the efficiency of software and program design and the compatibility of the software and the program, and meet the field debugging requirement of the air tightness detection system.
In a first aspect, an embodiment of the present invention provides an air tightness detection control method, including:
receiving a detection mode instruction;
determining a target detection mode according to the detection mode instruction;
and carrying out large leakage detection and/or micro leakage detection on the detection object according to the target detection mode, wherein the large leakage detection represents that the detection object is subjected to vacuumizing air pressure detection, and the micro leakage detection represents that the detection object is subjected to gas concentration detection.
In one embodiment, performing macro-leak detection and/or micro-leak detection on a detection object according to a target detection mode includes:
and under the condition that the target detection mode is the first detection mode, carrying out large leakage detection and micro leakage detection on the detection object.
In an embodiment, the performing large-leak detection and small-leak detection on the detection object includes:
vacuumizing the detection object, and detecting the air pressure difference value of the detection object, wherein the air pressure difference value represents the pressure change condition of the detection object before and after vacuumizing;
and under the condition that the air pressure difference value is smaller than or equal to a preset air pressure difference threshold value, filling the first gas into the detection object, and detecting the gas concentration of the detection object filled with the first gas to obtain a detection result.
In an embodiment, after the detecting the air pressure difference value of the detection object, the method further includes:
and under the condition that the air pressure difference value is greater than a preset air pressure difference threshold value, the detection object has a large leakage problem.
In an embodiment, the performing large-leakage detection and/or small-leakage detection on the detection object according to the target detection mode includes:
and carrying out microleakage detection on the detection object under the condition that the target detection mode is the second detection mode.
In one embodiment, the performing microleakage detection on a detection object includes:
and detecting the gas concentration of the detection object filled with the first gas to obtain a detection result.
In one embodiment, the detecting the gas concentration of the detection object filled with the first gas to obtain a detection result includes:
under the condition that the first gas concentration value of the detection object is detected to be larger than a preset concentration threshold value, the detection result indicates that the detection object has a microleakage problem; and/or the presence of a gas in the gas,
and under the condition that the first gas concentration value of the detection object is detected to be less than or equal to a preset concentration threshold value, the detection result indicates that the detection object does not have the problem of micro leakage.
In an embodiment, the number of the detection objects is at least two, and the performing microleakage detection on the detection objects includes:
simultaneously detecting the gas concentration of at least two detection objects filled with the first gas;
under the condition that the detection result indicates that the detection object has a leakage problem, extracting at least two detection objects filled with first gas and the first gas in the cavity where the detection objects are located;
cleaning at least two detection objects which have extracted first gas and the first gas in a first gas transmission pipeline, wherein the first gas transmission pipeline is a transmission pipeline between the detection objects and a detection unit group;
and filling the first gas into the at least two detection objects filled with the cleaned first gas, and independently detecting the gas concentration of each detection object filled with the first gas to obtain a detection result.
In one embodiment, the cleaning the at least two detection objects from which the first gas is extracted and the first gas in the first gas transmission pipeline includes:
and filling a second gas into the at least two detection objects and the first gas transmission pipelines from which the first gas is extracted, so as to perform cleaning treatment on the first gas in the detection objects and the first gas transmission pipelines through the second gas.
In a second aspect, an embodiment of the present invention provides a controller, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the tightness detection control method according to the first aspect when executing the computer program.
In a third aspect, an embodiment of the present invention provides an air-tightness detection system, which includes the controller of the second aspect.
In a fourth aspect, a computer-readable storage medium stores computer-executable instructions for executing the airtightness detection control method according to the first aspect.
The embodiment of the invention comprises the following steps: when the helium detection system needs to be subjected to field debugging work or specific production work, a controller for controlling the helium detection system receives a detection mode instruction, the detection mode instruction is issued according to the structure and the processing capacity of the helium detection system, then the controller can determine a target detection mode which needs to be executed by the helium detection system according to the detection mode instruction, and then large leakage detection and/or small leakage detection are/is carried out on a detection object according to the target detection mode, wherein the large leakage detection represents that the detection object is subjected to vacuum pumping air pressure detection, and the small leakage detection represents that the helium concentration detection is carried out on the detection object. According to the technical scheme of the embodiment, the switching of the detection modes can be realized through the controller on the basis of not changing the structure of the helium detection system, the compatibility of different detection modes is realized, the software and program design efficiency and the software and program compatibility are improved, and the field debugging requirement of the helium detection system is met.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a system architecture platform for performing a hermeticity detection control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a helium detection system provided by one embodiment of the present invention;
FIG. 3 is a schematic diagram of a helium detection system provided by another embodiment of the present invention;
fig. 4 is a flowchart of a method for controlling air tightness detection according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling airtightness detection according to another embodiment of the present invention;
fig. 6 is a flowchart of a method for controlling airtightness detection according to another embodiment of the present invention;
fig. 7 is a flowchart of a method for controlling air-tightness detection according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that although functional blocks are partitioned in a schematic diagram of an apparatus and a logical order is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the partitioning of blocks in the apparatus or the order in the flowchart. The terms "first," "second," and the like in the description, in the claims, or in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
At present, in the air tightness detection process, due to the difference of the number of cavities, the difference of detection stages or the difference of detection requirements, the process requirements of different production conditions need to be met by designing corresponding structures and control programs, but the air tightness detection process involves more flows, for example, the design processes of helium detection process, software, programs and the like are more complicated, the structures of air tightness detection systems are different due to the different number of cavities or the different detection stages or requirements, so that the designs of the software, the programs and the like are different, and the software and the programs of different design ideas are different, which is not favorable for the requirements of field debugging work.
In order to solve the existing problems, embodiments of the present invention provide an air tightness detection control method, a controller, a detection system, and a storage medium, where the air tightness detection control method applied to the controller of the helium detection system at least includes the following steps: receiving a detection mode instruction; determining a target detection mode according to the detection mode instruction; and carrying out large leakage detection and/or small leakage detection on the detection object according to the target detection mode, wherein the large leakage detection represents that the detection object is subjected to vacuum-pumping air pressure detection, and the small leakage detection represents that the detection object is subjected to gas concentration detection. In the technical scheme of the embodiment, the detection mode can be switched through the controller on the basis of not changing the structure of the gas tightness detection system, the compatibility of different detection modes is realized, the software and program design efficiency and the software and program compatibility are improved, and the field debugging requirement of the helium detection system is met.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, fig. 1 is a schematic diagram of a system architecture platform 100 for performing a hermeticity detection control method according to an embodiment of the present application.
In the example of fig. 1, the system architecture platform 100 is provided with a processor 110 and a memory 120, wherein the processor 110 and the memory 120 may be connected by a bus or other means, and fig. 1 illustrates the connection by the bus as an example.
The memory 120, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory 120 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 120 optionally includes memory located remotely from processor 110, which may be connected to system architecture platform 100 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The system architecture platform may be a programmable controller, or may be another controller, which is not specifically limited by this embodiment.
Those skilled in the art will appreciate that the system architecture platform illustrated in FIG. 1 does not constitute a limitation on the embodiments of the present application and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components.
Referring to fig. 2, fig. 2 is a schematic diagram of an air tightness detection system according to an embodiment of the present invention, the air tightness detection system includes a plurality of cavities 220 for placing detection objects 210, an hourglass detection module 230 for performing hourglass detection on the detection objects 210 in the cavities 220, and an hourglass detection module 240 for performing hourglass detection on the detection objects 210 in the cavities 220, where the hourglass detection represents performing vacuumized air pressure detection on the detection objects 210, and the hourglass detection represents performing gas concentration detection on the detection objects 210.
In an embodiment, referring to fig. 3, the airtightness detection system is a helium detection system, the helium detection system is a helium detection system for detecting a battery cell, the helium detection system includes two cavities for placing the battery cell, a large leakage detection module for performing large leakage detection on the battery cell in the cavity, and a small leakage detection module for performing small leakage detection on the battery cell in the cavity, the two cavities are a first cavity 301 and a second cavity 303 respectively, the first cavity 301 is provided with a first cavity communication valve 309 and a first battery cell communication valve 323, the second cavity 303 is provided with a second cavity communication valve 311 and a second battery cell communication valve 325, the large leakage detection module includes a cavity vacuum detection unit connected with the first cavity communication valve 309 and the second cavity communication valve 311 respectively, and a battery cell vacuum detection unit connected with the first battery cell 305 and the second battery cell 307 through the first cavity 301, the cavity vacuum detection unit includes a cavity vacuum pump set, a cavity vacuum gauge 313 and a cavity vacuum valve set vacuum communication valve set, one end of the cavity vacuum detection unit is connected with the first cavity communication valve 309, the second cavity communication valve set 309, and the other end of the cavity communication valve set is connected with the first cavity communication valve 301, and the first cavity communication valve set 309, and the second cavity communication valve set vacuum detection unit is connected with the first cavity communication valve 301. The cell vacuum detection unit comprises a first cell vacuum meter 315 for detecting a vacuum condition of the first cell 305, a second cell vacuum meter 317 for detecting a vacuum condition of the second cell 307, a cell vacuum valve 319 and a cell vacuum pump 321, wherein one end of the cell vacuum valve 319 is connected with the first cell communication valve 323 and the second cell communication valve 325 respectively, and the other end of the cell vacuum valve 319 is connected with the cell vacuum pump 321. The microleakage detection module comprises a helium filling valve 327, a helium filling unit 329, a helium detection unit group and a helium detection valve group, wherein the helium filling unit 329 fills helium gas into the first electric core 305 through the helium filling valve 327 and the first electric core communication valve 323, the helium filling unit 329 fills helium gas into the second electric core 307 through the helium filling valve 327 and the second electric core communication valve 325, the helium detection unit group is used for detecting the helium gas concentration in the first cavity 301 and/or the second cavity 303, and the helium detection valve group is used for controlling the first cavity 301 and/or the second cavity 303 to be communicated to the helium detection unit group.
Further, in some embodiments, the cavity vacuum pump set may include the roots pump 331, or may include the roots pump 331 and the roots pre-pump 333, or may include a cavity vacuum pump, which is not particularly limited in this embodiment.
It should be noted that the cavity vacuum connection valve set includes a cavity vacuum main valve 335 and a cavity vacuum valve 337, or may include a cavity vacuum valve 337, which is not specifically limited in this embodiment.
Further in some embodiments, a maintaining branch is disposed on the pipeline between the chamber vacuum main valve 335 and the chamber vacuum valve 337, a maintaining valve 339 and a maintaining pump 341 are disposed on the maintaining branch, one end of the maintaining valve 339 is connected to the pipeline between the chamber vacuum main valve 335 and the chamber vacuum valve 337, and the other end is connected to the maintaining pump 341.
Further in some embodiments, an air return branch is disposed between the first cell communication valve 323 and the second cell communication valve 325, and an air return valve 343 is disposed on the air return branch.
Further in some embodiments, a pipeline cleaning branch is disposed on the pipeline between the chamber vacuum main valve 335 and the chamber vacuum valve 337, and a pipeline cleaning valve 345 and a pipeline cleaning unit 347 are disposed on the pipeline cleaning branch, and the pipeline cleaning branch is used for cleaning helium gas remaining on the pipeline between the chamber vacuum main valve 335 and the chamber vacuum valve 337.
Further in some embodiments, a helium test line vacuum gauge 349 is disposed in the line between chamber vacuum manifold 335 and chamber vacuum 337 to detect the pressure in the line between chamber vacuum manifold 335 and chamber vacuum 337.
It should be noted that the helium detecting unit group may include a helium detector 351 and a helium detecting backing pump 353 connected to the helium detector 351, or may include the helium detector 351, the helium detecting backing pump 353 connected to the helium detector 351, a helium detector leakage valve 355 and a helium detector leakage orifice 357, where one end of the helium detector leakage valve 355 is connected to the helium detector 351 and the other end is connected to the helium detector leakage valve 355, and this embodiment is not particularly limited thereto.
It should be noted that the helium check valve group may include the main leak check valve 371 and the cavity leak check valve 373, or may include the cavity leak check valve 373, which is not specifically limited in this embodiment.
Further in some embodiments, the microleakage detection module further comprises a purge helium gas unit comprising a first purge valve 359 for connecting with the first chamber 301, a second purge valve 361 for connecting with the second chamber 303, a nitrogen output unit 363 connected with the first purge valve 359 and the second purge valve 361, respectively, and a nitrogen source meter 365 for detecting a nitrogen concentration.
Further, in some embodiments, the helium detection system further comprises an external leakage marking valve 367 and an external standard leakage hole 369, wherein one end of the external leakage marking valve 367 is connected with the external standard leakage hole 369, and the other end of the external leakage marking valve 367 is connected with the first chamber 301 vacuum valve and the chamber vacuum main valve 335 respectively.
Further, the helium detection system further comprises a cavity vent valve 375, and the cavity vent valve 375 is connected with the first cavity communication valve 309 and the second cavity communication valve 311 respectively.
Further, in some embodiments, the helium testing system further comprises an interface display module (not shown in the figure), an HMI display interface is programmed for facilitating checking and testing, the skipping process of the helium testing process and the result of each process step can be visually displayed through the HMI display interface, and the system further has a numerical function of displaying relevant parameters such as the cavity vacuum degree, the pressure value, the leakage rate and the like in the large leakage detection and small leakage detection processing processes. In order to facilitate the field debugging work, a program for manually setting parameters such as a detection threshold value, a vacuumizing pressure value and the like can be set.
It should be noted that when the helium detecting system is provided with four cavities, every two cavities can be taken as a group and divided into two groups, and the helium detecting system detects the helium in units of the groups during operation; or four cavities can be combined into a group, and the helium detection is carried out by taking the group as a unit during working; or three cavities may be a group, the remaining one is another group, and the helium test is performed in units of groups during operation. The connection of each packet is the same as in the above-described embodiment.
It should be noted that the number of the cavities provided in the helium detecting system may be two, three, or four, and this embodiment does not specifically limit the number.
It should be noted that in the same helium detecting system, the helium detector 351 may be provided with one or more than one, the cavities in different groups are detected by controlling various valve bodies provided in the microleakage detection module, microleakage detection may be performed on the electric cores in all the cavities at one time, microleakage detection may be performed on the electric cores in the cavities in the groups by taking the groups as units, microleakage detection may be performed on the electric cores in a single cavity, and this implementation does not specifically limit the detection.
In the helium detection system for the helium detection cell in this embodiment, valve bodies such as the communication valves (the first cavity communication valve 309, the first cell communication valve 323, the second cavity communication valve 311, and the second cell communication valve 325), the vacuum valves (the cell vacuum valve 319, the cavity vacuum valve 337), the leak detection valves (the main leak detection valve 371 and the cavity leak detection valve 373), and the helium filling valve (the helium filling valve 327) are concentrated on the cavity for placing the cell, and different common pipelines are connected and communicated with corresponding pumps, and the helium detection flow is controlled by signal interaction among the valves, the pumps, the helium detection instrument, the sensor, and the servo driver connected to the cavity through the system architecture platform (controller) in fig. 1.
It should be noted that, besides the functional structure in the foregoing embodiment, the helium detection system may further include a cavity background detection function, a cavity pressure rise rate determination function, a pipeline self-detection function, a helium detection calibration function, a communication pipeline cleaning function, and the like.
It should be noted that the helium detection system in the above embodiment is one embodiment of the airtightness detection system, and may also be a detection system for detecting other gases, and this embodiment does not specifically limit the detection system.
It should be noted that the system architecture platform in fig. 1 may be disposed in the air tightness detection system, or may be externally disposed in the air tightness detection system, and is in communication connection with the air tightness detection system, and the system architecture platform may be disposed according to actual situations, which is not specifically limited in this embodiment.
Based on the above system architecture platform and the air-tightness detection system, various embodiments of the air-tightness detection control method of the present invention are set forth below.
Referring to fig. 4, fig. 4 is a flowchart of a hermetic seal detection control method according to an embodiment of the present invention, and the control method according to an embodiment of the present invention is applied to a helium detection system, and the control method according to an embodiment of the present invention may include, but is not limited to, step S100, step S200, and step S300.
Step S100, receiving a detection mode command.
Specifically, when field debugging work or specific production work needs to be performed on the air tightness detection system, the controller for controlling the air tightness detection system receives a detection mode instruction. For example: when the helium detecting system needs to be subjected to field debugging work or specific production work, a controller for controlling the helium detecting system receives a helium picking mode instruction (a detection mode instruction).
It should be noted that the detection mode instruction may be an instruction issued by a user during field debugging, or may be an instruction preset according to a production requirement, and this embodiment is not particularly limited thereto.
It should be noted that, different structures of the airtightness detection systems are different, and detection modes of the airtightness detection systems for processing may be the same or different, and this embodiment does not specifically limit the airtightness detection systems, and is set according to actual working requirements and helium detection conditions during working.
And step S200, determining a target detection mode according to the detection mode command.
Specifically, for different detection mode instructions, different target detection modes are preset in the helium detection system and correspond to the helium detection system, after the helium detection system receives the detection mode instructions, the corresponding target detection modes can be determined according to the detection mode instructions, and a specific control program is called according to the target detection modes.
And step S300, carrying out large leakage detection and/or small leakage detection on the detection object according to the target detection mode, wherein the large leakage detection represents that the detection object is subjected to vacuumizing air pressure detection, and the small leakage detection represents that the detection object is subjected to gas concentration detection.
Specifically, when the air tightness detection process is a helium detection process, the helium detection process is used for detecting gaps of a shell of a detection object and comprises large leakage detection and micro leakage detection, the large leakage detection represents that vacuumizing air pressure detection is carried out on the detection object, and the micro leakage detection represents that helium concentration detection is carried out on the detection object. The large leakage detection is to vacuumize a cavity of a detection object and judge whether large leakage exists or not by comparing the air pressure drop value in the detection object with a preset air pressure difference threshold value; the micro-leakage detection is to fill helium (first gas) into a detection object, and determine whether the shell of the detection object leaks micro or not by detecting the helium concentration in the cavity where the detection object is located by a helium detector. The detection object is subjected to large-leakage detection according to the target detection mode, or the detection object may be subjected to small-leakage detection, or the detection object is subjected to large-leakage detection and small-leakage detection, or primary large-leakage detection and secondary small-leakage detection are performed according to the detection object, which is not specifically limited in this embodiment. For example: the target detection mode may include a first detection mode including large drain detection and small drain detection and a second detection mode including small drain detection. Another example is: the target detection mode may include a first detection mode including a microleakage detection, a second detection mode including a microleakage detection, and a third detection mode including a macroleak detection and a microleakage detection.
In the technical scheme of this embodiment, when the helium detection system needs to be subjected to field debugging work or specific production work, the controller for controlling the helium detection system receives a detection mode instruction, the detection mode instruction is issued according to the structure and the processing capacity of the helium detection system, then the controller determines a target detection mode to be executed by the helium detection system according to the detection mode instruction, and then performs major leak detection and/or minor leak detection on a detection object according to the target detection mode, wherein the major leak detection represents that the detection object is subjected to vacuum pumping pressure detection, and the minor leak detection represents that the helium concentration detection is performed on the detection object. According to the technical scheme of the embodiment, the switching of the detection modes can be realized through the controller on the basis of not changing the structure of the helium detection system, the compatibility of helium detection in different modes is realized, the software and program design efficiency and the software and program compatibility are improved, and the field debugging requirement of the helium detection system is met.
Referring to fig. 5, fig. 5 is a flowchart of an airtightness detection control method according to another embodiment of the present invention, and in a case that the target detection mode is the first detection mode, the step of performing large-leak detection and small-leak detection on the detection object may include, but is not limited to, step S510 and step S520.
Step S510, carrying out vacuum-pumping processing on the detection object, and detecting the air pressure difference value of the detection object, wherein the air pressure difference value represents the pressure variation condition before and after the vacuum-pumping processing of the detection object.
Specifically, firstly, vacuumizing the detection object through a large leakage detection module, wherein vacuumizing the detection object can be understood as vacuumizing the detection object and a cavity where the detection object is located, and detecting the pressure change conditions of the detection object before and after vacuumizing to determine whether the detection object has a large leakage problem, and the detection object does not have the large leakage problem under the condition that the air pressure difference value is less than or equal to a preset air pressure difference threshold value; and under the condition that the air pressure difference value is greater than a preset air pressure difference threshold value, the detection object has a large leakage problem.
In an embodiment, for the helium detection process of the battery cell, the large leakage detection process needs to determine the detection mode first, and if the detection mode is selected as the first detection mode, the large leakage detection process jumps to the large leakage detection process: the method comprises the steps that an upper ejection cylinder of a cavity (a first cavity and/or a second cavity) corresponding to a battery core (a first battery core and/or a second battery core) to be detected extends out to seal the cavity, a cavity vacuum valve and a cavity communicating valve (a first cavity communicating valve and/or a second cavity communicating valve) are opened, a cavity vacuum pump is started to vacuumize the cavity (the first cavity and/or the second cavity), the cavity used for placing the battery core is opened, the battery core communicating valve is opened, a cavity vacuum pump set is started, the pressure value of the battery core is recorded, and a large leakage detection result is judged according to the air pressure difference value of the battery core and the preset air pressure difference threshold value. If the detection result is OK (large leakage problem does not exist), skipping to the detection process of detecting the micro leakage; and if the detection result is NG, determining the battery cell with the large leakage problem, and performing rechecking processing without entering a micro leakage detection process.
In an embodiment, when two or more battery cells to be detected are provided, that is, two battery cells are subjected to large-leakage detection simultaneously, and when two cavities are detected simultaneously, if a large-leakage detection result is NG, one vacuum pumping recheck needs to be performed separately to determine which cavity has a detection result of NG.
And step S520, filling the first gas into the detection object under the condition that the air pressure difference value is smaller than or equal to a preset air pressure difference threshold, and detecting the gas concentration of the detection object filled with the first gas to obtain a detection result.
Specifically, under the condition that the air pressure difference value is smaller than or equal to the preset air pressure difference threshold value, it is indicated that the detection object does not have the problem of large leakage, that is, the detection object passes through large leakage detection, at this time, micro leakage detection needs to be performed on the detection object, helium (first gas) is filled into the detection object, helium detection is performed on the detection object filled with the helium (first gas) through the micro leakage detection module, so that a detection result is obtained, under the condition that the concentration of the helium (first gas) is detected to be larger than the preset concentration threshold value, the detection object is proved to have the problem of small leakage, and under the condition that the helium concentration value is smaller than or equal to the preset concentration threshold value, the detection result is that the detection object does not have the problem of micro leakage.
It should be noted that the preset air pressure difference threshold and the preset concentration threshold may be set according to the actual process requirements of the detection object, and this embodiment does not specifically limit the preset air pressure difference threshold and the preset concentration threshold.
In an embodiment, in the micro-leakage detection process, if the detection mode is helium detection, the cavity communicating valve and the cell communicating valve are opened to detect the cavity, and whether the cavity needs to be vacuumized is determined. And if the cavity pressure does not meet the condition, performing vacuum pumping on the cavity, opening a helium detection valve group when the cavity pressure meets the condition, opening a helium filling valve when the pressure of the leak detection pipeline meets the condition, filling helium into the battery cell, closing the helium filling valve when the pressure of the helium filling pipe meets the condition, and then reading data of a helium detector and judging according to the detection data to obtain a detection result.
Referring to fig. 6, fig. 6 is a flowchart of an airtightness detection control method according to another embodiment of the present invention, where the number of detection objects is at least two or more, and step S300 in the embodiment of the present invention includes, but is not limited to, step S610, step S620, step S630, and step S640.
Step S610, carrying out gas concentration detection on at least two detection objects filled with first gas at the same time;
step S620, under the condition that the detection result is that the detection object has a leakage problem, extracting at least two detection objects filled with the first gas and the first gas in the cavity where the detection objects are located;
step S630, cleaning at least two detection objects which have extracted the first gas and the first gas in a first gas transmission pipeline, wherein the first gas transmission pipeline is a transmission pipeline between the detection objects and the detection unit group;
step S640, filling the first gas into at least two detection objects filled with the cleaned first gas, and individually performing gas concentration detection on each detection object filled with the first gas to obtain a detection result.
Specifically, under the condition that the number of the detection objects is at least two or more, in order to improve the detection efficiency, helium detection may be performed on at least two detection objects filled with helium (first gas) at the same time, so as to obtain a helium detection result, if none of the detection objects detected at the same time leaks helium (first gas), a result of passing microleakage detection may be directly obtained, if the detection result is that the detection object has a leakage problem, extraction processing needs to be performed on helium (first gas) filled into the detection object at the same time, and helium (first gas) in a transmission pipeline between the detection object and a helium detection unit group is cleaned, after cleaning is completed, helium (first gas) is filled into the detection object which is cleaned with helium (first gas), and helium detection is performed on each detection object filled with helium (first gas) individually, so as to obtain a detection result, so as to obtain a cell in which the helium (first gas) leakage problem occurs, and because the yield of helium (first gas) is high in most cases, multiple detections can be effectively improved.
In an embodiment, in the step of extracting helium (first gas), a program in the controller jumps to an air bleeding flow, and determines whether helium (first gas) needs to be extracted, if an NG condition occurs after helium charging detection of the battery cell, the battery cell vacuum valve and the battery cell communication valve need to be opened, air pressure in the battery cell is extracted to a pressure set value by the battery cell vacuum pump, then the battery cell vacuum valve is closed, the cavity communication valve and the cavity air bleeding valve are opened, and when the pressure meets a requirement, the cavity communication valve and the cavity air bleeding valve are closed, and the air bleeding flow is ended. For dual-cavity, the program flow may jump to a single-cavity deflation flow.
In one embodiment, in the step of performing the cleaning process on the helium gas in the transmission pipeline, nitrogen gas (second gas) may be filled into at least two of the detection object from which the helium gas (first gas) has been extracted and the helium gas (first gas) in the transmission pipeline, so as to perform the cleaning process on the helium gas (first gas) in the detection object and the helium gas (first gas) in the transmission pipeline through the nitrogen gas (second gas), and detect the helium gas (first gas) in the transmission pipeline through the helium detector until the helium gas (first gas) is cleaned. The cavity and the helium (first gas) transmission pipeline are cleaned by nitrogen (second gas), so that misjudgment on a rechecking result due to the existence of residual helium ions when the detection object is subjected to microleakage detection and rechecking is avoided. Specifically, when the cleaning process conditions are met, the cavity communicating valve, the cavity cleaning valve and the cavity deflation valve are opened, after cleaning is carried out for a certain time, whether cavity pumping is needed or not is judged through accumulating the cleaning times, generally, after the cleaning times reach 3-5 times, vacuumizing is judged to be needed, the cavity vacuum valve is opened at the moment, the cavity vacuum valve is closed after the cavity pressure is pumped to be smaller than a set value, and the valve bodies such as the cavity communicating valve, the cavity cleaning valve and the cavity deflation valve are closed after cleaning is completed.
Referring to fig. 7 and fig. 7 are flowcharts illustrating a method for controlling air-tightness detection according to another embodiment of the present invention, in a case that the target detection mode is the second detection mode, the step of performing microleakage detection on the detection object may include, but is not limited to, step S710.
Step S710, performing gas concentration detection on the detection object filled with the first gas to obtain a detection result.
Specifically, under the condition that the target detection mode is the second detection mode, the object to be detected is proved to have passed the large leak detection and the object to be detected is filled with helium (first gas), namely, the large leak detection result directly displays OK and directly enters the micro leak detection process, at this time, the helium (first gas) is not required to be filled into the object to be detected, the pressure condition of the cavity where the object to be detected is located can be directly judged, and under the condition that the pressure requirement is met, the helium detector data is directly read, and the micro leak detection result can be obtained; if the concentration of the helium (first gas) is detected to be greater than the preset concentration threshold value, the shell of the detection object is proved to have the problem of micro-leakage, and if the concentration of the helium (first gas) is detected to be less than or equal to the preset concentration threshold value, the detection result is that the detection object does not have the problem of micro-leakage.
In an embodiment, in the same case that the number of the detection objects is at least two or more, in order to improve the detection efficiency, helium detection may be performed on at least two detection objects filled with helium gas at the same time, so as to obtain helium gas detection results, if the detection result shows that the detection objects have a leakage problem, the helium gas filled in the detection objects at the same time needs to be extracted, and the helium gas in a transmission pipeline between the detection objects and the helium detection unit group needs to be cleaned, after the cleaning is completed, the helium gas (first gas) is filled into the detection objects cleaned with the helium gas (first gas), and helium detection is performed on each detection object filled with the helium gas (first gas) separately, so as to obtain detection results, thereby obtaining a battery cell having a helium gas (first gas) leakage problem.
In addition, an embodiment of the present application provides a controller including: memory, a processor, and a computer program stored on the memory and executable on the processor. The processor and memory may be connected by a bus or other means. It should be noted that the controller in this embodiment may be correspondingly configured to include a memory and a processor as in the embodiment shown in fig. 1, and can form a part of the system architecture platform in the embodiment shown in fig. 1, both of which belong to the same inventive concept, so that both of them have the same implementation principle and beneficial effects, and are not described in detail herein.
The non-transitory software program and instructions required to implement the controller-side airtightness detection control method of the above-described embodiment are stored in the memory, and when executed by the processor, execute the airtightness detection control method of the above-described embodiment, for example, execute the above-described method steps S100 to S300 in fig. 4, method steps S510 to S520 in fig. 5, method steps S610 to S640 in fig. 6, and method step S710 in fig. 7.
In addition, an embodiment of the present application further provides a helium testing system, which includes the controller in the above embodiments, and the implementation principle and the beneficial effects are consistent with the controller, and will not be described in detail herein.
Further, an embodiment of the present application also provides a computer-readable storage medium storing computer-executable instructions for performing the air-tightness detection control method, for example, performing the above-described method steps S100 to S300 in fig. 4, method steps S510 to S520 in fig. 5, method steps S610 to S640 in fig. 6, and method step S710 in fig. 7.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art. Note that the computer-readable storage medium may be either nonvolatile or volatile.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the claims.
Claims (12)
1. An airtightness detection control method is characterized by comprising:
receiving a detection mode instruction;
determining a target detection mode according to the detection mode instruction;
and carrying out large leakage detection and/or small leakage detection on the detection object according to the target detection mode, wherein the large leakage detection characteristic is used for carrying out vacuum-pumping air pressure detection on the detection object, and the small leakage detection characteristic is used for carrying out gas concentration detection on the detection object.
2. The airtightness detection control method according to claim 1, wherein the performing of large-leak detection and/or small-leak detection on the detection object according to the target detection mode includes:
and under the condition that the target detection mode is the first detection mode, performing large leakage detection and micro leakage detection on the detection object.
3. The airtightness detection control method according to claim 2, wherein the performing of large leak detection and small leak detection on the detection object includes:
vacuumizing the detection object, and detecting the air pressure difference value of the detection object, wherein the air pressure difference value represents the pressure change condition of the detection object before and after vacuumizing;
and under the condition that the air pressure difference value is smaller than or equal to a preset air pressure difference threshold value, filling the first gas into the detection object, and detecting the gas concentration of the detection object filled with the first gas to obtain a detection result.
4. The airtightness detection control method according to claim 3, wherein after the detection of the air pressure difference value of the detection object, the method further comprises:
and under the condition that the air pressure difference value is larger than a preset air pressure difference threshold value, the detection object has the problem of large leakage.
5. The airtightness detection control method according to claim 1, wherein the performing of large-leak detection and/or small-leak detection on the detection object according to the target detection mode includes:
and performing microleakage detection on the detection object under the condition that the target detection mode is a second detection mode.
6. The airtightness detection control method according to claim 5, wherein the detection of the detection object by microleakage includes:
and detecting the gas concentration of the detection object filled with the first gas to obtain a detection result.
7. The airtightness detection control method according to claim 3 or 6, wherein the detecting a gas concentration of the detection object into which the first gas has been filled to obtain a detection result includes:
under the condition that the first gas concentration value of the detection object is detected to be larger than a preset concentration threshold value, the detection result indicates that the detection object has a microleakage problem; and/or the presence of a gas in the atmosphere,
and under the condition that the first gas concentration value of the detection object is detected to be less than or equal to a preset concentration threshold value, the detection result indicates that the detection object does not have the problem of microleakage.
8. The airtightness detection control method according to claim 7, wherein the number of the detection objects is at least two, and the detection of the detection objects by microleakage includes:
simultaneously detecting the gas concentration of at least two detection objects filled with the first gas;
under the condition that the detection result indicates that the detection object has a leakage problem, extracting at least two detection objects filled with first gas and the first gas in the cavity where the detection objects are located;
cleaning at least two detection objects which have extracted first gas and the first gas in a first gas transmission pipeline, wherein the first gas transmission pipeline is a transmission pipeline between the detection objects and a detection unit group;
and filling the first gas into the at least two detection objects filled with the cleaned first gas, and independently detecting the gas concentration of each detection object filled with the first gas to obtain a detection result.
9. The airtightness detection control method according to claim 8, wherein the cleaning process of the at least two detection objects from which the first gas has been extracted and the first gas in the first gas transmission pipeline includes:
and filling a second gas into the at least two detection objects and the first gas transmission pipelines from which the first gas is extracted, so as to perform cleaning treatment on the first gas in the detection objects and the first gas transmission pipelines through the second gas.
10. A controller, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the tightness detection control method according to any one of claims 1 to 9 when executing the computer program.
11. An air-tightness detection system, characterized by comprising: the controller of claim 10.
12. A computer-readable storage medium storing computer-executable instructions for performing the airtightness detection control method according to any one of claims 1 to 9.
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| CN202211199442.4A CN115406594A (en) | 2022-09-29 | 2022-09-29 | Airtightness detection control method, controller, detection system, and storage medium |
| PCT/CN2022/139647 WO2024066075A1 (en) | 2022-09-29 | 2022-12-16 | Air tightness detection control method, controller, detection system and storage medium |
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| CN117630007A (en) * | 2023-11-07 | 2024-03-01 | 浙江康思特动力机械有限公司 | Air tightness detection device of outdoor emergency generator set cylinder cover |
| WO2024066075A1 (en) * | 2022-09-29 | 2024-04-04 | 广东利元亨智能装备股份有限公司 | Air tightness detection control method, controller, detection system and storage medium |
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| CN113074877A (en) * | 2021-04-30 | 2021-07-06 | 广东利元亨智能装备股份有限公司 | Air tightness detection process |
| CN114563135A (en) * | 2022-03-02 | 2022-05-31 | 苏州中科科美科技有限公司 | Full-automatic air tightness detection device and detection method |
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| US4735084A (en) * | 1985-10-01 | 1988-04-05 | Varian Associates, Inc. | Method and apparatus for gross leak detection |
| CN201368790Y (en) * | 2008-09-29 | 2009-12-23 | 合肥皖仪科技有限公司 | Hypersensitized helium mass spectrometer leak detector |
| CN214471575U (en) * | 2020-12-28 | 2021-10-22 | 安徽诺益科技有限公司 | Modular helium mass spectrometer leak detector |
| CN115406594A (en) * | 2022-09-29 | 2022-11-29 | 广东利元亨智能装备股份有限公司 | Airtightness detection control method, controller, detection system, and storage medium |
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| CN113074877A (en) * | 2021-04-30 | 2021-07-06 | 广东利元亨智能装备股份有限公司 | Air tightness detection process |
| CN114563135A (en) * | 2022-03-02 | 2022-05-31 | 苏州中科科美科技有限公司 | Full-automatic air tightness detection device and detection method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024066075A1 (en) * | 2022-09-29 | 2024-04-04 | 广东利元亨智能装备股份有限公司 | Air tightness detection control method, controller, detection system and storage medium |
| CN117630007A (en) * | 2023-11-07 | 2024-03-01 | 浙江康思特动力机械有限公司 | Air tightness detection device of outdoor emergency generator set cylinder cover |
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