CN117168712B - Detection assembly, detection equipment and detection method thereof - Google Patents
Detection assembly, detection equipment and detection method thereof Download PDFInfo
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- CN117168712B CN117168712B CN202311452565.9A CN202311452565A CN117168712B CN 117168712 B CN117168712 B CN 117168712B CN 202311452565 A CN202311452565 A CN 202311452565A CN 117168712 B CN117168712 B CN 117168712B
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- 238000001514 detection method Methods 0.000 title claims abstract description 260
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Abstract
The application relates to a detection assembly, detection equipment and a detection method thereof, comprising the following steps: the detection cover is provided with a detection cavity with an opening at the bottom, and at least one extraction opening is formed on the wall surface of the detection cover; the detection probe is arranged in the detection cavity and/or the extraction opening; at least one first air blowing pipe arranged on the detection cover; the second air blowing pipe is arranged on the detection cover and is intersected with the air blowing direction of the first air blowing pipe; the air flow blown out by the first air blowing pipe and the second air blowing pipe is at least partially arranged on the periphery of the opening. The detection assembly, the detection equipment and the detection method thereof have the advantages of high detection precision and long service life.
Description
Technical Field
The present disclosure relates to battery production detection technology, and in particular, to a detection assembly, a detection device, and a detection method thereof.
Background
The gas leakage detection method has the advantages of low cost and high sensitivity, and is widely applied to battery production detection. However, the current leak detection method is applied to the industrial field, and still has the defects of large detection error and poor stability of the detection probe, and can not effectively meet the requirement of large-scale detection of the battery.
Disclosure of Invention
Based on this, it is necessary to provide a detection assembly, a detection apparatus and a detection method thereof to improve the problem of large detection errors of the detection probe.
A first aspect of embodiments of the present application provides a detection assembly, comprising: the detection cover is provided with a detection cavity with an opening at the bottom, and at least one extraction opening is formed on the wall surface of the detection cover; the detection probe is arranged in the detection cavity and/or the extraction opening; at least one first air blowing pipe arranged on the detection cover; the second air blowing pipe is arranged on the detection cover and is intersected with the air blowing direction of the first air blowing pipe; the air flow blown out by the first air blowing pipe and the second air blowing pipe is at least partially arranged on the periphery of the opening.
The air curtain is formed by the air flows blown out by the first air blowing pipe and the second air blowing pipe, and at least part of the air curtain is arranged on the periphery of the opening in a surrounding mode, so that in the process of exhausting and detecting an exhaust opening in the detection cover, air in the external environment is reduced from entering the detection cavity from the opening, the detection precision of the detection probe is improved, and the stability of a detection result is improved; and further, the interference gas in the external environment is prevented from being adsorbed on the detection probe in a large amount, so that the passivation rate of the detection probe can be effectively delayed, the service life is prolonged, and the maintenance cost is reduced.
In one embodiment, the detection assembly comprises a plurality of detection probes, and all detection probes are arranged at intervals. The detection is carried out through a plurality of detection probes simultaneously, so that the detection precision can be improved, and the erroneous judgment of the result is avoided.
In one embodiment, the blowing pressure of the first blowing pipe is greater than or equal to the air suction pressure of the air suction opening; and/or the blowing pressure of the second air blowing pipe is greater than or equal to the air suction pressure of the air suction opening. Through setting up the pressure value, the air current that first gas-blowing pipe and second gas-blowing pipe blown out can make the detection intracavity form the environment of a micro positive pressure, can avoid the interference gas in the external environment effectively like this from the opening entering detection chamber in, and then can avoid the interference gas in the external environment to be adsorbed on detecting probe by a large amount effectively, delays detecting probe's passivation rate effectively, increase of service life, reduction maintenance cost.
In one embodiment, the detection cover comprises a cover top plate and a plurality of cover side plates, and the cover side plates are connected end to end and are arranged around the periphery of the cover top plate to form the detection cavity; the air extraction opening is arranged on the cover top plate.
In one embodiment, the first air-blowing pipe blows air towards the hood top plate and/or hood side plate.
In one embodiment, the first air blowing pipe is arranged on the side of the cover top plate facing the detection cavity. Therefore, the air flow blown out by the first air blowing pipe flows along the plate surface of the cover top plate to one side of the cover side plate, and then is folded to the direction of the opening under the action of the cover side plate, so that an air curtain can be formed at the periphery of the opening.
In one embodiment, the detection assembly includes a first gas supply tube that extends through the cover top plate and communicates with the first gas blow tube. Thus, the first gas supply pipe can continuously supply clean gas to the first gas blowing pipe, so that the interference gas in the external environment is reduced to be adsorbed on the detection probe in a large amount.
In one embodiment, the first air blowing pipe comprises a plurality of first air blowing ports, and the air blowing directions of at least two first air blowing ports are opposite.
In one embodiment, the first air blowing pipe comprises a first branch pipe and a second branch pipe which are communicated with each other, the junction of the first branch pipe and the second branch pipe is connected with the first air supply pipe, and the air blowing directions of the two ends of the first branch pipe and the two ends of the second branch pipe are parallel to the plate surface of the cover top plate. Therefore, the air flow blown out by the first air blowing pipe can cover more plane angles, so that an air curtain is formed to be surrounded on the periphery of the opening, and the interference gas in the external environment is reduced to enter the detection cavity and be adsorbed on the detection probe in a large quantity.
In one embodiment, the second blowing pipe blows in a direction in which the cover top plate points toward the opening.
In one embodiment, the second air blowing pipe is arranged on one side of the cover side plate facing the detection cavity; alternatively, the second air blowing pipe is arranged on the side of the cover side plate, which is opposite to the detection cavity.
In one embodiment, the detection assembly comprises a second gas supply pipe penetrating through the cover top plate or the cover side plate; the second air supply pipe is communicated with one end, close to the cover top plate, of the second air blowing pipe, and one end, far away from the cover top plate, of the second air blowing pipe blows downwards along the second direction. Thus, the second gas supply pipe can continuously supply clean gas to the second gas blowing pipe, so that the interference gas in the external environment is reduced to be adsorbed on the detection probe in a large amount.
A second aspect of embodiments of the present application provides a detection device, including the detection assembly described above.
In one embodiment, the detection device comprises a controller, a clean air source, a first control valve, a second control valve, a detection pipeline and a negative pressure device; one end of the detection pipeline is communicated with the negative pressure device, the extraction opening is connected with the other end of the detection pipeline through the first control valve, and the clean air source is connected with the other end of the detection pipeline through the second control valve; the detection probe is arranged in the detection pipeline; the controller is in control connection with the first control valve, the second control valve and the clean air source; the detection probe is in signal connection with the controller.
A third aspect of the embodiments of the present application provides a detection method, including:
determining the current state of the detection equipment; if the detection equipment is in the detection state currently, opening a first control valve, closing a second control valve and closing a clean air source; if the detection equipment is in a standby state currently, the first control valve is closed, the second control valve is opened, and the clean air source is opened.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Fig. 1 is a schematic view illustrating an exploded structure of a battery according to some embodiments of the present application.
Fig. 2 is a schematic structural diagram of a detection assembly according to some embodiments of the present application.
Fig. 3 is a front view of a detection assembly provided in some embodiments of the present application.
Fig. 4 is a cross-sectional view A-A of the structure shown in fig. 3.
Fig. 5 is a B-B cross-sectional view of the structure shown in fig. 3.
Fig. 6 is a schematic cross-sectional view of a detection assembly provided in some embodiments of the present application.
Fig. 7 is a schematic diagram of a detection apparatus according to some embodiments of the present application.
Fig. 8 is a flowchart of a detection method according to some embodiments of the present application.
In the figure, X is shown as a first direction and Y is shown as a second direction.
Reference numerals illustrate:
the detection cover-10, the detection cavity-11, the air extraction opening-12, the cover top plate-13, the cover side plate-14, the bottom opening-15, the detection probe-20, the first air blowing pipe-30, the first air supply pipe-31, the first branch pipe-32, the second branch pipe-33, the second air blowing pipe-40, the second air supply pipe-41, the controller-91, the clean air source-92, the first control valve-93, the second control valve-94, the detection pipeline-95 and the negative pressure device-96.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, these terms "first," "second," etc., are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order, or a primary or secondary relationship.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the terms "plurality" and "a plurality" mean at least two (including two), such as two, three, etc., unless specifically defined otherwise. Similarly, the terms "plurality of sets" and "plurality of sets" when present refer to more than two sets (including two sets), and the terms "plurality of sheets" when present refer to more than two sheets (including two sheets).
In the description of the embodiments of the present application, if there are any such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter-clockwise", "axial", "radial", "circumferential", etc., these terms refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," etc., should be construed broadly if any. For example, the two parts can be fixedly connected, detachably connected or integrated; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and various fields such as aerospace and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.
In the related art, a battery stores or releases corresponding electric energy by means of an internal electrochemical reaction; harmful gas is easily generated in the electrochemical reaction process, and is blocked in the internal space through the battery, so that leakage is prevented. The air tightness of the battery connection gap is one of the key factors affecting the performance and life of the product. Especially in the mass production of batteries, it is often necessary to detect whether there is leakage in the battery to ensure the quality of the battery.
The current design generally adopts a detection cover to cover the battery, is externally connected to large-scale negative pressure equipment, and utilizes the gas on the negative pressure suction box body to sniff and detect the connecting joint on the battery; in the detected gap, the large negative pressure equipment cannot be turned off at will, so that the detection cover is always in an air extraction state; in the current industrial field, the gas components in the external environment are complex and unstable, the detection probes in the detection cover are easily interfered when the detection probes in the open environment are exposed for a long time, a large amount of interference gas in the external environment can be adsorbed, so that the detection errors of the detection probes are large, the stability is poor, the passivation rate is accelerated, the service life is shortened, and the maintenance cost is increased.
In order to improve the situation, a blowing device can be artificially added on the design of the detection cover, so that the interference gas in the external environment is reduced from entering the detection cover; the method and the device improve the detection precision of the detection probe, effectively slow down the passivation rate of the detection probe, prolong the service life and reduce the maintenance cost.
Fig. 1 is an exploded view of a battery 100 provided in some embodiments of the present application; to meet various power requirements, the battery 100 may include a plurality of battery cells 121 and a case 110, and the battery cells 121 refer to the smallest units constituting the battery module 120 or the battery pack. Multiple cells 121 may be connected in series and/or parallel via electrode terminals for use in various applications.
The battery 100 referred to in this application may be a battery pack with a case 110. The case 110 is used for accommodating the battery cells 121 or the battery module 120 to prevent the liquid or other foreign matters from affecting the charge or discharge of the battery cells 121.
The case 110 may take a variety of configurations. In some embodiments, the case 110 may include a first portion 111 and a second portion 112, where the first portion 111 and the second portion 112 are mutually covered, and the first portion 111 and the second portion 112 together define an accommodating space for accommodating the battery cell 121. The second portion 112 may be a hollow structure with one end opened, the first portion 111 may be a plate-shaped structure, and the first portion 111 covers the opening side of the second portion 112, so that the first portion 111 and the second portion 112 together define an accommodating space; the first portion 111 and the second portion 112 may also be hollow structures with one side open, and the open side of the first portion 111 is covered with the open side of the second portion 112. Of course, the case 110 formed by the first portion 111 and the second portion 112 may have various shapes, for example, a simple three-dimensional structure such as a single cuboid or a cylinder or a sphere, or a complex three-dimensional structure formed by combining simple three-dimensional structures such as a cuboid or a cylinder or a sphere, which is not limited in this embodiment. The material of the case 110 may be an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin, which is not limited in the embodiment of the present invention.
In the embodiment of the present application, the plurality of electric cells 121 may directly form a battery pack, or may first form the battery module 120, and then form the battery pack by the battery module 120. Specifically, the multiple electric cores 121 may be directly connected in series, in parallel, or in series-parallel to form a whole, and then the whole formed by the multiple electric cores 121 is accommodated in the case 110. The battery modules 120 may be formed by connecting a plurality of battery cells 121 in series or parallel or series-parallel connection, and the battery modules 120 are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 110.
In addition, the battery 100 may further include other structures, for example, the battery 100 may further include a bus bar member for making electrical connection between the plurality of battery cells 121.
It should be noted that, each of the battery cells 121 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The cell 121 may be cylindrical, flat, rectangular, or other shape. The cells 121 are generally divided into three types in a packaged manner: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment.
During the charge and discharge process of the battery, the cell 121 performs an electrochemical reaction, so that a small amount of harmful gas may be generated, and the gas remains inside the cell 121, but may enter the case 110 during long-term use, and further escape to the external environment along the connecting seam between the first portion 111 and the second portion 112.
A first aspect of embodiments of the present application provides a detection assembly. The detection assembly may be provided to cover the battery 100 for detecting air tightness.
It should be understood that the technical solutions generally described in the embodiments of the present application may be applied to all batteries including a case, in which case, the detecting assembly may be covered on the case 110 of the battery 100, and the corresponding air tightness detection is performed on the connecting seam where the first portion 111 and the second portion 112 are mutually covered. The technical solutions generally described in the embodiments of the present application may also be applied to a battery without a case, that is, a bare cell 121, where the detection assembly may be directly covered on the cell 121, so as to perform corresponding air tightness detection on a welded seam between the housing and the end cover on the cell 121. For convenience of description, in the following embodiments, the detection assembly is used to perform the air tightness detection on the battery case 110.
Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a detection assembly according to some embodiments of the present application. Fig. 3 is a front view of a detection assembly provided in some embodiments of the present application.
The detection assembly includes: the detection hood 10, the detection probe 20, at least one first insufflation tube 30, and at least one second insufflation tube 40.
Wherein, the detection cover 10 is a hollow structure with one side open; the detection cavity 11 has a detection cavity 11 with an opening 15 at the bottom, and the projection shape of the detection cavity 11 is generally adapted to the case 110 of the battery 100, and may be various shapes, such as a simple shape of a regular rectangle, a square, or the like, or may be a complex shape formed by combining simple structures such as a polygon, a circle, or the like, which is not limited in this embodiment of the present application. The material of the detection cover 10 may be an alloy material such as an aluminum alloy or an iron alloy, or a polymer material such as a foam, and the present embodiment is not limited thereto.
Wherein, at least one air extraction opening 12 is formed on the wall surface of the detection cover 10; the suction port 12 communicates the detection chamber 11 with an external negative pressure device 96 (mentioned later). The detection probe 20 is arranged in the detection chamber 11 and/or the extraction opening 12 for the corresponding detection of the components in the gas.
The detection probe 20 can be a hydrogen sensor, is very sensitive to hydrogen at normal temperature and has good selectivity; the air tightness of the connection seam of the case 110 of the reaction cell 100 is utilized as a trace gas.
The first air blowing pipe 30 is arranged on the detection cover 10; and blows the air flow in a first direction. The second air blowing pipe 40 is provided on the detection cover 10; and blow out the air flow in the second direction. The second blowing pipe 40 intersects the blowing direction of the first blowing pipe 30, that is, the first direction intersects the second direction.
When the detection cover 10 is covered on the case 110 of the battery 100, the first air-blowing pipe 30 and the second air-blowing pipe 40 respectively blow out air flows according to the preset directions, so that the air flows blown out by the first air-blowing pipe 30 and the second air-blowing pipe 40 can jointly form an air curtain, at least part of the air curtain is arranged around the periphery of the opening 15, and therefore, in the process of exhausting and detecting the air suction opening 12 in the detection cover 10, the air in the external environment is reduced from entering the detection cavity 11 from the opening 15, the external interference is reduced, and the detection precision of the detection probe 20 and the stability of the detection result are improved;
when the detecting cover 10 is in an undetected standby state, the external negative pressure device 96 is still turned on, the air in the detecting cavity 11 is continuously sucked by the air suction opening 12, and the air flows are blown out by the first air blowing pipe 30 and the second air blowing pipe 40 respectively according to the preset directions, so that the air flows blown out by the first air blowing pipe 30 and the second air blowing pipe 40 can jointly form an air curtain, at least part of the air curtain is arranged on the periphery of the opening 15, and thus, most of the air supplied by the detecting cavity 11 from the outside comes from the air flows blown out by the first air blowing pipe 30 and the second air blowing pipe 40, thereby avoiding that the interference air in the external environment is adsorbed on the detecting probe 20 in a large amount, further effectively delaying the passivation rate of the detecting probe 20, prolonging the service life and reducing the maintenance cost.
In some possible embodiments, the detection assembly includes a plurality of detection probes 20, all detection probes 20 being spaced apart; by using a plurality of detection probes 20 to detect simultaneously, the detection accuracy can be improved, and erroneous judgment of the result caused by the occurrence of an error in one of the detection probes 20 can be avoided.
Specifically, the plurality of air extraction openings 12 may be disposed, and may be distributed according to the positions of the connection seams where the first portion 111 and the second portion 112 of the case 110 are mutually covered, that is, one or more detection probes 20 are corresponding to each section of connection seam, so as to accurately detect the air tightness of the battery 100.
Optionally, the detection assembly includes 2-4 extraction openings 12, which are respectively arranged on the front, back, left and right of the detection cavity 11, and one or more detection probes 20 can be arranged in each extraction opening 12.
In some possible embodiments, the blowing pressure of the first blowing pipe 30 is greater than or equal to the suction pressure of the suction opening 12. So, the air current that first inflation pipe 30 blown out can form the air curtain, and the air curtain encloses to establish in the week side of opening 15 for can form the environment of a micro positive pressure in detecting cavity 11, can avoid like this effectively that the interference gas in the external environment from opening 15 enters into detecting cavity 11, and then can avoid effectively that the interference gas in the external environment is adsorbed on detecting probe 20 by a large amount, thereby delays the passivation rate of detecting probe 20 effectively, increase of service life, thereby reduce maintenance cost.
Similarly, the blowing pressure of the second blowing pipe 40 is greater than or equal to the suction pressure of the suction port 12; the effect is also to enable a micro-positive pressure environment to be formed in the detection chamber 11, so that the interference gas in the external environment can be effectively prevented from entering the detection chamber 11 from the opening 15.
In some possible embodiments, reference is made to fig. 2-6; FIG. 3 is a front view of a sensing assembly provided in some embodiments of the present application, FIG. 4 is a cross-sectional view A-A of the structure shown in FIG. 3, FIG. 5 is a cross-sectional view B-B of the structure shown in FIG. 3, and FIG. 6 is a cross-sectional schematic view of a sensing assembly provided in some embodiments of the present application; the inspection hood 10 includes a hood top plate 13 and a plurality of hood side plates 14.
A plurality of cover side plates 14 are connected end to end and are arranged around the periphery of the cover top plate 13 to form a detection cavity 11; the suction port 12 is provided in the cover top plate 13, and an opening 15 is formed in the detection chamber 11 on the side opposite to the cover top plate 13. The cover top plate 13 may have various shapes, such as a single rectangular shape, a circular shape, a triangular shape, etc., or may have a complex shape formed by combining simple regular shapes, such as a rectangular shape, a circular shape, a triangular shape, etc., which is not limited in this embodiment.
In some possible embodiments, referring to fig. 2-6, the first inflation tube 30 blows air toward the hood top panel 13 and/or hood side panel 14.
Specifically, the first air blowing pipe 30 may be provided at a side of the cover top plate 13 facing the detection chamber 11. Wherein the first direction is parallel to the plate surface of the cover top plate 13; the first direction may be a certain direction within the panel.
The air flow blown out by the first air blowing pipe 30 flows along the cover side plate 14 on one side of the surface of the cover top plate 13, and then is folded to the direction of the opening 15 under the action of the cover side plate 14, so that an air curtain can be formed on the periphery of the opening 15, the air in the external environment is reduced from entering the detection cavity 11 from the opening 15, and the external interference is reduced, so that the detection precision of the detection probe 20 is improved, and the stability of the detection result is improved.
In some possible embodiments, referring to fig. 2 to 6, the detecting assembly includes a first air supply pipe 31, where the first air supply pipe 31 penetrates the cover top plate 13 and communicates with the first air blowing pipe 30; the first gas supply pipe 31 is connected to an external gas source or gas pump, and can continuously supply clean gas to the first gas blowing pipe 30, thereby reducing a large amount of interference gas in the external environment from being adsorbed on the sensing probe 20.
In some possible embodiments, referring to fig. 2 and 3, the first air blowing pipe 30 includes a plurality of first air blowing ports, and the blowing directions of at least two first air blowing ports are opposite.
For example, the first air blowing pipe 30 may be a straight pipe or a bent pipe, the middle part of the pipe body of the first air blowing pipe 30 is communicated with the first air supply pipe 31, and the first air blowing ports at both ends of the first air blowing pipe 30 are formed in a T-shaped structure, and can blow air flows to both sides respectively.
In other possible embodiments, the first blowing pipe 30 may be an X-shaped pipe structure formed by intersecting a plurality of pipe bodies; referring to fig. 3, the first blowing pipe 30 includes a first branch pipe 32 and a second branch pipe 33 which are communicated with each other, and a plane where the first branch pipe 32 and the second branch pipe 33 are located is parallel to a plate surface of the cover top plate 13; the first branch pipe 32 and the second branch pipe 33 are generally perpendicular, but may be disposed at an acute angle or an obtuse angle, and the embodiment is not limited thereto.
The junction of the first branch pipe 32 and the second branch pipe 33 is connected with the end part of the first air supply pipe 31, so that the first air supply pipe 31 supplies air to the first branch pipe 32 and the second branch pipe 33 at the same time, and the blowing directions of the first blowing ports at the two ends of the first branch pipe 32 and the two ends of the second branch pipe 33 are parallel to the plate surface of the cover top plate 13; so, make the air current that first gas-blast pipe 30 blows out as far as possible can cover more plane angles to form the air curtain around establishing in the week side of opening 15, reduce the interference gas in the external environment and enter into detection chamber 11 and be adsorbed on detection probe 20 by a large amount, finally improve detection precision and increase of service life.
Alternatively, referring to fig. 2 to 6, the detection assembly comprises at least two first inflation tubes 30; the two first air blowing pipes 30 are disposed at a spacing. Wherein a part of the first air blowing pipe 30 blows out an air flow in the first direction toward the one-side cover side plate 14; the other part of the first air blowing pipe 30 blows out the air flow in the first direction toward the other hood side plate 14 on the opposite side.
In some possible embodiments, the second direction is configured to be directed along the cover top plate 13 in the direction of the opening 15. That is, the second blowing pipe 40 blows in the direction in which the hood top 13 is directed toward the opening 15.
Referring to fig. 5, the second air blowing pipe 40 is arranged in the second direction on the side of the cover side plate 14 facing the detection chamber 11; thus, when the detection cover 10 is covered on the case 110 of the battery 100, the air flow blown by the second air blowing pipe 40 can be directly blown on the connection seam of the case 110 of the battery 100, and forms a micro-positive pressure environment in the detection cavity 11, so that the air in the external environment is reduced to enter the detection cavity 11, thereby improving the detection precision of the detection probe 20 and the stability of the detection result.
In other embodiments, referring to fig. 6, the second blowpipe 40 is disposed on a side of the cover side plate 14 facing away from the detection chamber 11 in the second direction. In this way, the air flow blown out by the second air blowing pipe 40 forms an air curtain around the periphery of the opening 15, so that the interference gas in the external environment is prevented from being adsorbed on the detection probe 20 in a large amount, the passivation rate of the detection probe 20 can be effectively delayed, the service life is prolonged, and the maintenance cost is reduced.
In some possible embodiments, referring to fig. 4, the sensing assembly includes a second gas supply tube 41; the second air supply duct 41 may be provided to penetrate the cover top plate 13 or the cover side plate 14, specifically, depending on the design.
The second air supply pipe 41 communicates with an end of the second air blowing pipe 40 near the hood top 13, and an end of the second air blowing pipe 40 remote from the hood top 13 blows air downward in the second direction. The second gas supply pipe 41 is connected to an external gas source or gas pump, and can continuously supply clean gas to the second gas blowing pipe 40, thereby reducing a large amount of interference gas in the external environment from being adsorbed on the sensing probe 20.
Optionally, in combination with the orientation shown in fig. 4, the detection assembly comprises at least two second inflation tubes 40. Wherein a part of the second air-blowing pipes 40 are arranged on one side of the hood side plate 14 in the second direction and blow out the air flow downward in a direction away from the hood top plate 13, and the rest of the second air-blowing pipes 40 are arranged on the opposite side of the hood side plate 14 in the second direction and blow out the air flow downward in a direction away from the hood top plate 13.
Alternatively, there may be a plurality of second inflation tubes 40, one to three second inflation tubes 40 being disposed on each of the hood side panels 14. In this way, the air flow blown out by the second air blowing pipe 40 can form a larger range of air curtain around the periphery of the opening 15 as much as possible, so that the interference gas in the external environment is reduced from entering the detection cavity 11 and being adsorbed on the detection probe 20 in a large amount, and finally the detection precision is improved and the service life is prolonged.
In some embodiments, the detection assembly includes an air blow pump (not labeled) that may be in communication with the first air blow tube 30 through the first air supply tube 31; the blowing pump may communicate with the second blowing pipe 40 through the second air supply pipe 41; thereby continuously providing clean gas to avoid interference gas entering the detection chamber 11 to be adsorbed on the detection probe 20 in a large amount.
A second aspect of the present application provides a detection device comprising a detection assembly as described above.
In some possible embodiments, referring to fig. 1 to 7, fig. 7 is a schematic diagram of a detection apparatus according to some embodiments of the present application; the detection apparatus includes a controller 91, a clean air source 92, a first control valve 93, a second control valve 94, a detection conduit 95, and a negative pressure device 96.
One end of the detection pipeline 95 is communicated with the negative pressure device 96, the air extraction opening 12 is connected with the other end of the detection pipeline 95 through the first control valve 93, and the clean air source 92 is connected with the other end of the detection pipeline 95 through the second control valve 94. The controller 91 is in control connection with a first control valve 93, a second control valve 94 and a clean air source 92; the detection probe 20 is in signal connection with the controller 91.
The detection probe 20 is disposed within the detection conduit 95; the negative pressure device 96 may be a vacuum pump, and the clean gas source 92 may be capable of providing clean gas into the detection conduit 95, so as to avoid a large amount of interference gas from being adsorbed on the detection probe 20. The controller 91 feedback the operator with the signal fed back from the detection probe 20 to confirm the tightness of the current battery.
A third aspect of the present application provides a detection method of a detection device, referring to fig. 8, and fig. 8 is a flowchart of the detection method provided in some embodiments of the present application.
The detection method comprises the following steps:
s10, determining the current state of the detection equipment. The current state of the detection device can be determined by manually inputting related instructions, or a corresponding sensor can be arranged in the detection cover 10, when the detection cover 10 is covered on the box body 110 of the battery 100, the sensor triggers, and the detection device enters into the detection state, otherwise, is in the standby state.
S20, if the detection equipment is in the detection state currently, the first control valve 93 is opened, the second control valve 94 is closed, and the clean air source 92 is closed. The controller 91 judges that the detection device is currently in a detection state, and controls the first air blowing pipe 30 and the second air blowing pipe 40 to blow clean air flows respectively according to preset directions, so that the air flows blown out by the first air blowing pipe 30 and the second air blowing pipe 40 are enclosed on the periphery of the opening 15, interference gas of the external environment is reduced to enter the detection cavity 11 from the opening 15, and then the interference gas is reduced to enter the detection pipeline 95 from the extraction opening 12, thereby avoiding that the interference gas in the external environment is adsorbed on the detection probe 20 in a large amount, further effectively delaying the passivation rate of the detection probe 20, prolonging the service life and reducing the maintenance cost.
S30, if the detection equipment is in a standby state currently, the first control valve 93 is closed, the second control valve 94 is opened, and the clean air source 92 is opened. The controller 91 judges that the detection equipment is currently in a standby state, controls the first control valve 93 to be closed, ensures that the interference gas of the external environment cannot enter the detection pipeline 95 from the extraction opening 12, simultaneously, the opened negative pressure device 96 is in a continuous extraction process, and the clean gas source 92 supplies gas to the negative pressure device 96 through the second control valve 94, so that the negative pressure device 96 cannot be damaged due to empty state; the gas in the clean gas source 92 is generally filtered or purified, and contains the interference gas component, so that the clean gas source 92 supplies gas into the detection pipeline 95, thereby effectively avoiding the interference gas in the external environment from being adsorbed on the detection probe 20 in a large amount, further effectively delaying the passivation rate of the detection probe 20, prolonging the service life and reducing the maintenance cost.
It should be noted that, when the detection apparatus is in the standby state, the first air blowing pipe 30 and the second air blowing pipe 40 may stop blowing the air flow, or may continuously blow air, so as to reduce the interference gas component in the gas in the detection chamber 11, and prepare for the next detection.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (14)
1. A sensing assembly, comprising:
a detection cover (10) provided with a detection cavity (11) with an opening (15) at the bottom, wherein at least one extraction opening (12) is formed on the wall surface of the detection cover (10);
a detection probe (20) arranged in the detection cavity (11) and/or the extraction opening (12);
at least one first air-blowing pipe (30) arranged on the detection cover (10);
and at least one second air-blowing pipe (40) provided on the detection cover (10) and intersecting the air-blowing direction of the first air-blowing pipe (30);
the air flows blown out by the first air blowing pipe (30) and the second air blowing pipe (40) are at least partially enclosed on the periphery of the opening (15);
the detection assembly further comprises an air blowing pump, a first air supply pipe (31) and a second air supply pipe (41), wherein the air blowing pump is communicated with the first air blowing pipe (30) through the first air supply pipe (31); the air blowing pump is communicated with the second air blowing pipe (40) through the second air supply pipe (41);
the detection cover (10) comprises a cover top plate (13) and a plurality of cover side plates (14), wherein the cover side plates (14) are connected end to end and are arranged around the periphery of the cover top plate (13) in a surrounding manner so as to form the detection cavity (11); the air extraction opening (12) is arranged on the cover top plate (13).
2. The detection assembly according to claim 1, characterized in that it comprises a plurality of said detection probes (20), all of said detection probes (20) being spaced apart.
3. The detection assembly according to claim 1, characterized in that the blowing pressure of the first blowing pipe (30) is greater than or equal to the suction pressure of the suction opening (12); and/or the number of the groups of groups,
the blowing pressure of the second blowing pipe (40) is larger than or equal to the pumping pressure of the pumping hole (12).
4. The detection assembly according to claim 1, characterized in that the first gas blow pipe (30) blows gas towards the hood top plate (13) and/or hood side plate (14).
5. The detection assembly according to claim 1, characterized in that the first blow pipe (30) is arranged at a side of the cover top plate (13) facing the detection chamber (11).
6. The detection assembly according to claim 5, characterized in that the first gas supply tube (31) is provided through the cover top plate (13) and communicates with the first gas blow tube (30).
7. The detection assembly according to claim 1, wherein the first air-blowing pipe (30) comprises a plurality of first air-blowing openings, the air-blowing directions of at least two first air-blowing openings being opposite.
8. The detection assembly according to claim 6, wherein the first blowing pipe (30) comprises a first branch pipe (32) and a second branch pipe (33) communicating with each other;
the junction of the first branch pipe (32) and the second branch pipe (33) is connected with the first air supply pipe (31), and the blowing directions of the two ends of the first branch pipe (32) and the two ends of the second branch pipe (33) are parallel to the plate surface of the cover top plate (13).
9. The detection assembly according to claim 1, wherein the second blowing pipe (40) blows in a second direction configured to be directed in a direction of the opening (15) along the cover top plate (13).
10. The detection assembly according to claim 1, characterized in that the second blow pipe (40) is arranged at a side of the hood side plate (14) facing the detection chamber (11); alternatively, the second air blowing pipe (40) is arranged at the side of the cover side plate (14) facing away from the detection cavity (11).
11. The detection assembly according to claim 9, wherein the second air supply pipe (41) is provided through the cover top plate (13) or the cover side plate (14); the second air supply pipe (41) is communicated with one end, close to the cover top plate (13), of the second air blowing pipe (40), and one end, far away from the cover top plate (13), of the second air blowing pipe (40) blows downwards along the second direction.
12. A detection apparatus comprising a detection assembly as claimed in any one of claims 1 to 11.
13. The detection apparatus according to claim 12, characterized in that the detection apparatus comprises a controller (91), a clean gas source (92), a first control valve (93), a second control valve (94), a detection conduit (95) and a negative pressure device (96);
one end of the detection pipeline (95) is communicated with the negative pressure device (96), the air extraction opening (12) is connected with the other end of the detection pipeline (95) through the first control valve (93), and the clean air source (92) is connected with the other end of the detection pipeline (95) through the second control valve (94); the detection probe (20) is arranged in the detection pipeline (95);
the controller (91) is in control connection with the first control valve (93), the second control valve (94) and the clean air source (92); the detection probe (20) is in signal connection with the controller (91).
14. A detection method applied to the detection apparatus according to claim 13, characterized in that the detection method comprises:
determining the current state of the detection equipment;
if the detection equipment is in the detection state currently, opening a first control valve, closing a second control valve and closing a clean air source;
if the detection equipment is in a standby state currently, the first control valve is closed, the second control valve is opened, and the clean air source is opened.
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