CN216449118U - Air tightness detection device - Google Patents
Air tightness detection device Download PDFInfo
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- CN216449118U CN216449118U CN202123011230.2U CN202123011230U CN216449118U CN 216449118 U CN216449118 U CN 216449118U CN 202123011230 U CN202123011230 U CN 202123011230U CN 216449118 U CN216449118 U CN 216449118U
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Abstract
The application relates to an air tightness detection device, which belongs to the technical field of lithium battery air tightness detection, and comprises: a support; the clamping device is arranged on the support and comprises a first cover plate and a second cover plate, an air pressure space is defined between the first cover plate and the second cover plate, when the battery top cover is placed between the first cover plate and the second cover plate, the battery top cover divides the air pressure space into a first air pressure space and a second air pressure space which are mutually independent, and one of a welding seam of a positive pole of the battery top cover, a welding seam of a negative pole of the battery top cover and the explosion-proof valve is positioned in the air pressure space; the driving piece is rotatably arranged on the support and is in threaded connection with the first cover plate, the driving piece is used for enabling the first cover plate to move to be close to or far away from the second cover plate through rotation, and one of the first air pressure space and the second air pressure space is used for being communicated with the inflation assembly and/or the air pressure detection device. The detection device provided by the utility model has a simple structure.
Description
Technical Field
The application relates to the technical field of lithium battery air tightness detection, in particular to an air tightness detection device.
Background
At present, power battery enterprises are developed vigorously, the battery yield is increased day by day, the abnormal air tightness is one of the common problems of the battery in the processing and manufacturing process, the phenomenon can further cause the electrolyte in the battery to overflow, the safety use performance of the battery is seriously influenced, and even serious consequences such as explosion, fire and the like can be caused. The reason for causing the battery gas tightness abnormity has the factor of processing manufacturing process, also has the factor of battery structure supplied material quality, the gas tightness supplied material of battery top cap structure detects, the detection position that relates to mainly has utmost point post and explosion-proof valve, traditional battery top cap gas tightness detects the frock is put into the frock die cavity with battery top cap whole, apply certain atmospheric pressure afterwards and adjust negative pole post and explosion-proof valve and detect simultaneously, to the bad apron sample of gas tightness, traditional detection frock can't carry out the accuracy judgement to the gas leakage position, so just can't make corresponding improvement measure to battery top cap structure manufacturing link according to the emergence probability of defective products gas leakage position, just also be difficult to the yields of effectual promotion apron structure processing.
In addition, for the detection of the opening pressure of the battery explosion-proof valve, the traditional detection method is to weld the cover plate and the aluminum shell into a hollow shell and then carry out the explosion test. The traditional test method is time-consuming and labor-consuming and has certain dangerousness.
Based on this, it is necessary to provide a new battery top cover airtightness detection tool capable of solving the above problems.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the air tightness detection device which is simple in structure and can be used for detecting one of the welding joint of the positive pole column, the welding joint of the negative pole column and the explosion-proof valve independently.
The air tightness detection device comprises: a support; the clamping device is arranged on the support and comprises a first cover plate and a second cover plate, an air pressure space is defined between the first cover plate and the second cover plate, when the battery top cover is placed between the first cover plate and the second cover plate, the battery top cover divides the air pressure space into a first air pressure space and a second air pressure space which are mutually independent, and one of a welding seam of a positive pole of the battery top cover, a welding seam of a negative pole of the battery top cover and the explosion-proof valve is positioned in the air pressure space; the driving piece is rotatably arranged on the support and is in threaded connection with the first cover plate, the driving piece is used for enabling the first cover plate to move to be close to or far away from the second cover plate through rotation, and one of the first air pressure space and the second air pressure space is used for being communicated with the inflation assembly and/or the air pressure detection device
The air tightness detection device provided by the embodiment of the utility model has a simple structure, can be used for independently detecting one of the welding seam of the positive pole column, the welding seam of the negative pole column and the explosion-proof valve, and can be used for rapidly determining the air tightness of the welding seam of the positive pole column, the welding seam of the negative pole column or the welding position of the explosion-proof valve.
According to the airtightness detection device provided by the embodiment of the utility model, the first cover plate and the driving piece jointly define a first channel, the first channel is communicated with the inflation assembly and/or the air pressure detection device, the inflation assembly and/or the air pressure detection device can be communicated with the first air pressure space by arranging the first channel, in some embodiments, the first channel is communicated with the inflation assembly, the air pressure detection device is communicated with the second air pressure space, so that the inflation assembly can inflate the first air pressure space, the air pressure change in the second air pressure space is detected by the air pressure detection device, if the air pressure in the second air pressure space changes within a period of time, the air tightness of the to-be-detected piece (the welding seam of the positive pole, the welding seam of the negative pole or the explosion-proof valve) is poor, the detected battery top cover product is unqualified, and if the air pressure does not change, the air tightness of the part to be tested is good, and the tested battery top cover product is qualified; in other embodiments, the first channel is communicated with the air pressure detection device, the inflation assembly is communicated with the second air pressure space, so that air is introduced into the second air pressure space through the inflation assembly, then the air pressure change in the first air pressure space is detected through the air pressure detection device, if the air pressure in the first air pressure space is not changed within a period of time, the air tightness of the to-be-detected part can be judged to be good, and the to-be-detected battery top cover product is qualified; if the air pressure in the first air pressure space changes within a period of time, the air tightness of the to-be-tested piece is poor, and the to-be-tested battery top cover product is unqualified. In other embodiments, the first channel is communicated with both the inflation assembly and the air pressure detection device, so that the inflation assembly can inflate the first air pressure space, and then the air pressure detection device detects the change of the air pressure in the first air pressure space after the inflation is stopped.
Optionally, be equipped with the double-screw bolt on the first apron, be equipped with the air vent in the double-screw bolt, be equipped with the screw hole and the smooth hole that communicate in proper order in the driving piece, the double-screw bolt is worn to locate in the screw hole, the air vent forms first passageway with smooth hole intercommunication jointly, so can reduce part quantity, realize through double-screw bolt and driving piece assembly that the orientation that the second apron was close to or was kept away from to the orientation removal of first apron orientation through rotating the driving piece, whole structure assembly is simple, and is with low costs, and is respond well.
Optionally, the smooth bore is a stepped bore, and a section of the smooth bore proximal to the threaded bore has a larger diameter than a section distal to the threaded bore. The diameter of the vent hole in the stud and the diameter of a section of the smooth inner hole far away from the threaded hole are approximately equal as far as possible, so that air flow can flow more smoothly in the vent hole.
Optionally, the two sections of the smooth bore having different diameters are smooth transitions. Therefore, the airflow can be guided into the stepped hole, and the gas is prevented from being gathered.
According to the air tightness detection device provided by the embodiment of the utility model, the support comprises the base and the top plate, the second cover plate is arranged on the base, the top of the driving piece is arranged in the limiting hole in a penetrating manner, the section of the driving piece, which penetrates out of the limiting hole, is sleeved with the nut, the nut and the first cover plate are arranged on two sides of the top plate, on one hand, the displacement of the driving piece in the horizontal direction can be limited through the limiting hole, the driving piece can be guided, and the driving piece is prevented from being clamped with the stud and cannot be screwed due to inclination.
Optionally, one side that is close to first apron on the driving piece is equipped with the shaft shoulder, and when the driving piece removed in spacing hole, the shaft shoulder can support and lean on in the roof, so carry on spacingly in vertical direction to the driving piece, prevent that the driving piece from twisting and moving excessively, loosen from the double-screw bolt and take off to play the foolproof effect of certain degree, thereby shorten and carry out the man-hour of operation that detects to the piece that awaits measuring.
According to the air tightness detection device provided by the embodiment of the utility model, the side, away from the second air pressure space, of the second cover plate is provided with the vent pipe. The second air pressure space can be communicated with the inflation assembly and/or the air pressure detection device through the vent pipe. The position arrangement and installation of other devices are facilitated.
Optionally, the support includes base and roof, the second apron is arranged in on the base, be equipped with the locating hole on the base, the breather pipe is worn to locate in the locating hole, so can be through the cooperation of breather pipe with the locating hole, be fixed in the second apron on the base, prevent that the mistake from touching the emergence of the condition such as removal, can satisfy the demand of aerifing or detecting the atmospheric pressure change to second atmospheric pressure space, can satisfy the location fixed action to the second apron again, whole gas tightness detection device's structure setting has been simplified, the spare part quantity has been reduced simultaneously, overall structure is rationally distributed, the cost is lower, help extensive popularization and application.
According to the air tightness detection device provided by the embodiment of the utility model, the first cover plate is provided with the first mounting groove, the first mounting groove extends along the circumferential direction of the first air pressure space, the side wall of the first mounting groove is provided with the limiting groove, the first mounting groove is internally provided with the first sealing element matched with the mounting groove in shape, the circumferential direction of the first sealing element is provided with the first skirt edge, the first skirt edge is embedded into the limiting groove, and the second cover plate is provided with the second mounting groove and the second sealing element which are in mirror symmetry with the first mounting groove and the first sealing element.
According to the air tightness detection device provided by the embodiment of the utility model, the first sealing element and the second sealing element are arranged, so that when the first cover plate and the second cover plate tightly press the battery top cover, the air tightness of the first air pressure space and the second air pressure space is realized through the tight sealing of the first sealing element and the second sealing element, the air pressure in the first air pressure space or the second air pressure space can be accurately detected, and the influence of error detection on the yield of the battery top cover to be detected is prevented.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a perspective view of an airtightness detection apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of an air-tightness detecting device according to an embodiment of the present invention connected to an inflation assembly and a pneumatic pressure detecting device;
fig. 3 is an exploded view of a airtightness detection apparatus according to an embodiment of the present invention;
fig. 4 is a sectional view of a airtightness detection apparatus according to an embodiment of the present invention;
fig. 5 is an enlarged view of a portion a in fig. 4.
Reference numerals:
the air tightness detection device 1, the bracket 10, the base 11, the positioning hole 112, the top plate 12, the limiting hole 122, the clamping device 20, the first cover plate 21, the stud 212, the vent hole 213, the second cover plate 22, the vent pipe 222, the second mounting groove 224, the driving member 30, the threaded hole 31, the smooth inner hole 32, the nut 33, the shaft shoulder 34, the first sealing member 40, the first skirt edge 41, the second sealing member 50, the second skirt edge 51,
a battery top cover 2, a positive pole post 2a, a negative pole post 2b, an explosion-proof valve 2c,
an inflation assembly 3 and an air pressure detection device 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 to 3, an airtightness detection apparatus 1 according to an embodiment of the present invention includes: a support 10, a clamping device 20 and a drive 30.
Specifically, the clamping device 20 is arranged on the support 10, the clamping device 20 comprises a first cover plate 21 and a second cover plate 22, an air pressure space is defined between the first cover plate 21 and the second cover plate 22, when the battery top cover 2 is placed between the first cover plate 21 and the second cover plate 22, the battery top cover 2 divides the air pressure space into a first air pressure space and a second air pressure space which are independent of each other, and one of the welding seam of the positive pole 2a, the welding seam of the negative pole 2b and the explosion-proof valve 2c of the battery top cover 2 is positioned in the air pressure space; the driving member 30 is rotatably disposed on the bracket 10, the driving member 30 is in threaded connection with the first cover plate 21, and the driving member 30 is configured to move the first cover plate 21 to approach or separate from the second cover plate 22 by rotating, wherein one of the first air pressure space and the second air pressure space is configured to communicate with the inflation assembly 3 and/or the air pressure detection device 4.
This means that in some embodiments, the inflation assembly 3 and the pressure detection device 4 are in communication with the first pressure space at the same time, in other embodiments, the inflation assembly 3 and the pressure detection device 4 are in communication with one of the first pressure space and the second pressure space, respectively, for example, in some embodiments, the inflation assembly 3 is in communication with the first pressure space and the pressure detection device 4 is in communication with the second pressure space, in some embodiments, the inflation assembly 3 is in communication with the second pressure space and the pressure detection device 4 is in communication with the first pressure space.
The specific detection method is as follows: first atmospheric pressure space and gas charging component 3 intercommunication, then atmospheric pressure detection device 4 and second atmospheric pressure space intercommunication, so can aerify in to first atmospheric pressure space through gas charging component 3, the atmospheric pressure change in the second atmospheric pressure space is detected to rethread atmospheric pressure detection device 4, if in a period, atmospheric pressure in the second atmospheric pressure space changes, then explain the gas tightness of the piece that awaits measuring (the welded joint of positive post 2a, the welded joint of negative pole post 2b or explosion-proof valve 2c) is relatively poor, 2 products of battery top cap that are surveyed are unqualified, if do not change, then explain the gas tightness of the piece that awaits measuring is good, if the gas tightness of three piece that awaits measuring is all good, 2 products of battery top cap that are surveyed are qualified.
The first air pressure space is communicated with the air pressure detection device 4, the inflation assembly 3 is communicated with the second air pressure space, so that air is introduced into the second air pressure space through the inflation assembly 3, then the air pressure change in the first air pressure space is detected through the air pressure detection device 4, if the air pressure in the first air pressure space is unchanged within a period of time, the air tightness of the to-be-detected part can be judged to be good, and if the air tightness of the three to-be-detected parts is good, the to-be-detected battery top cover 2 product is qualified; if the air pressure in the first air pressure space changes within a period of time, the air tightness of the part to be tested is poor, and the tested battery top cover 2 product is unqualified.
In other embodiments, the first air pressure space is communicated with the inflation assembly 3 and the air pressure detection device 4, the inflation assembly 3 can be used for inflating the first air pressure space, the air pressure change in the first air pressure space is detected by the air pressure detection device 4 after the inflation is stopped, if the air pressure in the first air pressure space changes within a period of time, the air tightness of the to-be-detected part is poor, the to-be-detected battery top cover 2 product is unqualified, if the air tightness of the to-be-detected part is not changed, the air tightness of the to-be-detected part is good, and if the air tightness of the three to-be-detected parts is good, the to-be-detected battery top cover 2 product is qualified. Or the second air pressure space can be communicated into the liquid pool through the air pipe, if bubbles appear in the liquid pool, the product of the battery top cover 2 is unqualified, if no movement and stillness exist in the liquid pool, the air tightness of the piece to be detected is good, if the air tightness of the three pieces to be detected is good, the product of the battery top cover 2 is qualified, and therefore the accuracy of the air tightness of the product of the battery top cover 2 can be ensured more accurately.
In addition, in some embodiments, the shape of the inner wall of the air pressure space is adapted to the shape of the object to be tested, for example, the shape of the object to be tested is circular, the shape of the inner wall of the air pressure space is cylindrical, the shape of the object to be tested is square, and the shape of the inner wall of the air pressure space is square-cylindrical, but the application is not limited thereto.
In addition, the airtightness detection device 1 of the present application is not limited to detecting the airtightness of the weld seam of the upper part of the battery top cover 2, and can also be used for detecting the airtightness of weld seams of other parts with similar structures.
The air tightness detection device 1 according to the embodiment of the utility model has a simple structure, can realize the detection of one of the welding seam of the positive pole post 2a, the welding seam of the negative pole post 2b and the explosion-proof valve 2c independently, and can quickly determine the air tightness of the welding seam of the positive pole post 2a or the welding seam of the negative pole post 2b or the welding position of the explosion-proof valve 2 c.
It should be noted that the first cover 21 and the second cover 22 may be disposed along the vertical direction, the first cover 21 may be disposed above the second cover 22, the first cover 21 and the second cover 22 may be disposed along the horizontal direction, and the first cover 21 may be disposed on the left side or the right side of the second cover 22, but the present application is not limited thereto.
According to the air tightness detecting device 1 of the embodiment of the present invention, the first cover plate 21 and the driving member 30 together define a first passage, the first passage is communicated with the inflation assembly 3 and/or the air pressure detecting device 4, and the inflation assembly 3 and/or the air pressure detecting device 4 can be communicated with the first air pressure space by the first passage.
In some embodiments, the first channel is communicated with the inflation assembly 3, the air pressure detection device 4 is communicated with the second air pressure space, so that the first air pressure space can be inflated through the inflation assembly 3, then the air pressure change in the second air pressure space is detected through the air pressure detection device 4, if the air pressure in the second air pressure space changes within a period of time, the air tightness of the to-be-detected part (the welding seam of the positive pole 2a, the welding seam of the negative pole 2b or the explosion-proof valve 2c) is poor, the to-be-detected battery top cover 2 product is unqualified, if the air tightness of the to-be-detected part is not changed, the air tightness of the to-be-detected part is good, and if the air tightness of the three to-be-detected parts is good, the to-be-detected battery top cover 2 product is qualified.
In other embodiments, the first channel is communicated with the air pressure detection device 4, the inflation assembly 3 is communicated with the second air pressure space, so that air is introduced into the second air pressure space through the inflation assembly 3, then the air pressure change in the first air pressure space is detected through the air pressure detection device 4, if the air pressure in the first air pressure space does not change within a period of time, the air tightness of the to-be-detected piece can be judged to be good, and if the air tightness of the three to-be-detected pieces is good, the to-be-detected battery top cover 2 product is qualified; if the air pressure in the first air pressure space changes within a period of time, the air tightness of the to-be-tested piece is poor, and the to-be-tested battery top cover 2 product is unqualified.
In other embodiments, the first channel is communicated with both the inflation assembly 3 and the air pressure detection device 4, so that the inflation assembly 3 can inflate the first air pressure space, and then the air pressure detection device 4 detects the change of the air pressure in the first air pressure space after the inflation is stopped, if the air pressure in the first air pressure space changes within a period of time, the air tightness of the to-be-detected part is poor, the to-be-detected battery top cover 2 product is unqualified, if the air tightness of the to-be-detected part is not changed, the air tightness of the to-be-detected part is good, and if the air tightness of the three to-be-detected parts is good, the to-be-detected battery top cover 2 product is qualified.
As shown in fig. 3 to 5, optionally, a stud 212 is arranged on the first cover plate 21, a vent hole 213 is arranged in the stud 212, a threaded hole 31 and a smooth inner hole 32 which are sequentially communicated are arranged in the driving member 30, the stud 212 is arranged in the threaded hole 31 in a penetrating manner, the vent hole 213 and the smooth inner hole 32 are communicated to form a first channel together, so that the number of parts can be reduced, the stud 212 and the driving member 30 are assembled to drive the first cover plate 21 to move towards a direction close to the second cover plate 22 or towards a direction far away from the second cover plate 22 by rotating the driving member 30, and the whole structure is simple to assemble, low in cost and good in effect.
As shown in fig. 4, the smooth bore 32 is optionally a stepped bore, with a section of the smooth bore 32 proximal to the threaded bore 31 having a larger diameter than a section distal to the threaded bore 31. This allows the vent hole 213 in the stud 212 to be as large as possible in diameter as the smooth bore 32 is away from the threaded bore 31, thereby allowing airflow to flow more smoothly therethrough.
As shown in fig. 4, optionally, the two sections of the smooth bore 32 having different diameters are smooth transitions. Therefore, the airflow can be guided into the stepped hole, and the gas is prevented from being gathered.
As shown in fig. 3 to 5, according to the air tightness detecting device 1 of the embodiment of the present invention, the bracket 10 includes a base 11 and a top plate 12, the second cover plate 22 is disposed on the base 11, the top plate 12 is provided with a limiting hole 122, the top of the driving member 30 is inserted into the limiting hole 122, a section of the driving member 30 that penetrates through the limiting hole 122 is sleeved with a nut 33, the nut 33 and the first cover plate 21 are disposed on two sides of the top plate 12, on one hand, the driving member 30 can be limited in displacement in the horizontal direction by the limiting hole 122, the driving member 30 can be guided, and the driving member 30 is prevented from being locked with the stud 212 due to inclination and being unable to be screwed.
As shown in fig. 3, optionally, a shoulder 34 is disposed on one side of the driving member 30 close to the first cover plate 21, when the driving member 30 moves in the limiting hole 122, the shoulder 34 can abut against the top plate 12, so that the driving member 30 is limited in the vertical direction, and the driving member 30 is prevented from being excessively screwed and loosened from the stud 212, thereby playing a certain degree of fool-proofing role, and shortening the operation time for detecting the to-be-detected member.
According to the air-tightness detecting device 1 of the embodiment of the present invention, the side of the second cover plate 22 away from the second air pressure space is provided with the vent pipe 222. Communication of the second air pressure space with the inflation assembly 3 and/or the air pressure detecting device 4 may be achieved through the air vent tube 222. The position arrangement and installation of other devices are facilitated.
As shown in fig. 3-5, optionally, the bracket 10 includes a base 11 and a top plate 12, the second cover plate 22 is disposed on the base 11, the base 11 is provided with a positioning hole 112, the vent pipe 222 is disposed in the positioning hole 112 in a penetrating manner, so that the second cover plate 22 can be fixed on the base 11 through the cooperation of the vent pipe 222 and the positioning hole 112, and the occurrence of situations such as movement due to mistaken touching is prevented, which can meet the requirement of inflation or detection of air pressure change in the second air pressure space, and can also meet the positioning and fixing effect on the second cover plate 22, thereby simplifying the structural arrangement of the whole air tightness detection device 1, and reducing the number of parts, and the overall structure is reasonable in layout, low in cost, and beneficial to large-scale popularization and application.
As shown in fig. 3, according to the air-tightness detecting device 1 of the embodiment of the present invention, the first cover plate 21 is provided with a first mounting groove extending along a circumferential direction of the first air pressure space, a limit groove is provided on a sidewall of the first mounting groove, a first sealing member 40 adapted to a shape of the mounting groove is provided in the first mounting groove, a first skirt 41 is provided in the circumferential direction of the first sealing member 40, the first skirt 41 is embedded in the limit groove, and the second cover plate 22 is provided with a second mounting groove 224 and a second sealing member 50 which are mirror-symmetrical to the first mounting groove and the first sealing member 40. It will be appreciated that a second skirt 51 is provided on the second seal 50.
According to the air tightness detection device 1 of the embodiment of the utility model, the first sealing element 40 and the second sealing element 50 are arranged, so that when the first cover plate 21 and the second cover plate 22 are pressed against the battery top cover 2, the first air pressure space and the second air pressure space are sealed tightly through the first sealing element 40 and the second sealing element 50, the air pressure in the first air pressure space or the second air pressure space can be accurately detected, and the influence of misdetection on the yield of the battery top cover 2 to be detected is prevented.
It can be understood that the side of the first sealing member 40 adjacent to the second cover plate 22 extends beyond the first cover plate 21, and the side of the second sealing member 50 adjacent to the first cover plate 21 extends beyond the second cover plate 22, so that the first cover plate 21 and the second cover plate 22 are compressed by the first sealing member 40 and the second sealing member 50 when the battery top cover 2 is fixed to the battery top cover, thereby improving the airtightness of the first air pressure space and the second air pressure hole.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (10)
1. An airtightness detection apparatus, comprising:
a support;
the clamping device is arranged on the support and comprises a first cover plate and a second cover plate, an air pressure space is defined between the first cover plate and the second cover plate, when a battery top cover to be tested is placed between the first cover plate and the second cover plate, the battery top cover divides the air pressure space into a first air pressure space and a second air pressure space which are mutually independent, and one of a welding seam of a positive pole of the battery top cover, a welding seam of a negative pole of the battery top cover and an explosion-proof valve is positioned in the air pressure space;
a driving member rotatably disposed on the bracket, the driving member being in threaded connection with the first cover plate, the driving member being configured to move the first cover plate to approach or separate from the second cover plate by rotating, wherein,
one of the first and second air pressure spaces is adapted to communicate with an inflation assembly and/or an air pressure detection device.
2. The air-tightness detecting device according to claim 1, wherein the first cover plate and the driving member define a first passage in communication with the inflation assembly and/or the air pressure detecting device.
3. The airtightness detection apparatus according to claim 2, wherein a stud is provided on the first cover plate, an air vent is provided in the stud, a threaded hole and a smooth inner hole which are sequentially communicated are provided in the driving member, the stud is inserted into the threaded hole, and the air vent and the smooth inner hole are communicated to form the first passage together.
4. The airtightness detection apparatus according to claim 3, wherein the smooth inner hole is a stepped hole, and a section of the smooth inner hole close to the threaded hole has a larger diameter than a section far from the threaded hole.
5. The airtightness detection apparatus according to claim 4, wherein two sections of the smooth inner hole having different diameters are smooth transitions.
6. The airtightness detection apparatus according to claim 1, wherein the support includes a base and a top plate, the second cover plate is disposed on the base, a limiting hole is provided on the top plate, a top portion of the driving member is inserted into the limiting hole, a section of the driving member, which penetrates through the limiting hole, is sleeved with a nut, and the nut and the first cover plate are located on both sides of the top plate.
7. The airtightness detection apparatus according to claim 6, wherein a shoulder is provided on a side of the driving member adjacent to the first cover plate, and the shoulder can abut against the top plate when the driving member moves in the limiting hole.
8. The air-tightness detecting device according to claim 1, wherein a vent pipe is provided on a side of the second cover plate away from the second air pressure space.
9. The airtightness detection apparatus according to claim 8, wherein the support includes a base and a top plate, the second cover plate is placed on the base, the base is provided with a positioning hole, and the vent pipe is inserted into the positioning hole.
10. The airtightness detection device according to claim 1, wherein a first mounting groove is formed in the first cover plate, the first mounting groove extends in a circumferential direction of the first air pressure space, a limiting groove is formed in a side wall of the first mounting groove, a first sealing member adapted to the first mounting groove in shape is arranged in the first mounting groove, a first skirt is arranged in the circumferential direction of the first sealing member, the first skirt is embedded in the limiting groove, and a second mounting groove and a second sealing member which are mirror-symmetrical to the first mounting groove and the first sealing member are formed in the second cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123011230.2U CN216449118U (en) | 2021-12-01 | 2021-12-01 | Air tightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123011230.2U CN216449118U (en) | 2021-12-01 | 2021-12-01 | Air tightness detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216449118U true CN216449118U (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202123011230.2U Active CN216449118U (en) | 2021-12-01 | 2021-12-01 | Air tightness detection device |
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