A general tooling structure for checking the airtightness of products

Abstract

The present invention relates to a general tooling structure for inspecting the air tightness of a product, including a flexible positioning component disposed on at least one surface of the battery pack to be detected, which is used to flexibly position the battery pack and adaptively adjust the inflation port of the air transmission device located above the battery pack to keep it relatively perpendicular to the plane of the battery pack where the air tightness detection hole is located when the inflation port presses on the air tightness detection hole. The present invention realizes the adaptive adjustment of the shape of the inflation port and the adjustment of the position of the battery pack to be detected through the flexible positioning component, effectively improving the positioning effect and the detection accuracy, and can be applicable to various battery types with different shapes, ensuring the positioning effect of the battery.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and particularly to a general tooling structure for inspecting the air tightness of products. Background Art

[0002] With the progress and development of society, the intelligentization in aspects such as warehousing, households, and travel, and the diversification of portable consumer electronic products, batteries, as providers of clean energy, are increasingly sought after and favored by consumers and have become an indispensable part of electronic products. During the application process, through the air tightness test, ensuring that the battery pack after production can achieve the water-proof effect of IPX7 helps to improve user satisfaction and the use safety of the battery pack for customers, and thus becomes a very meaningful research topic.

[0003] Usually, a separate vacuum pumping tooling is designed for battery pack testing, which not only increases the development cycle but also increases the cost of auxiliary tooling for development; for some products that are only used as samples and not mass-produced later, it causes excessive waste of tooling and a more serious design and development cycle.

[0004] Since the shape of the battery pack is usually modified according to the shape of the application product, and there are usually corresponding reinforcing ribs or grooves and other structures on the surface, there will also be special-shaped or beveled battery packs, and the positions of the air tightness detection holes will also have many changes, making it difficult to use one tooling to detect the air tightness of all products. In addition, after the battery pack is fixed and limited, the inflation port needs to be aligned with the air tightness detection hole on the battery pack and then vacuum pumped for detection. The inflation port usually needs to be externally pressed against the air tightness detection hole to prevent detachment. Only when the inflation port is perpendicular to the air tightness detection hole can the redundant folding of the rubber plug of the inflation port be effectively reduced, ensuring the favorable deformation of the inflation port, thereby improving the sealing effect. Excessive uneven folding will also accelerate the aging of the inflation port and affect the air tightness. When the inflation port is inclined and pressed against the air tightness detection hole, there will be a risk of air leakage, affecting the air tightness detection. And due to the connection ports and other structures on the battery pack, it is not easy to fix the battery pack in a very flat manner. Therefore, corresponding fixing tooling needs to be designed to ensure the relatively accurate docking of the inflation port and the air tightness detection hole, which will also lead to an increase in the number of toolings. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In order to solve the above problems of the prior art, the present invention provides a general tooling structure for inspecting the air tightness of products, which can effectively improve the connection stability between the inflation port and the battery pack, avoid air leakage, and at the same time can effectively realize the positioning of various types of batteries, reducing the positioning tooling.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the main technical solutions adopted by the present invention include:

[0009] A general tooling structure for inspecting the airtightness of a product, characterized in that: it includes a flexible positioning member disposed on at least one surface of the battery pack to be detected for flexibly positioning the battery pack and adaptively adjusting the inflation port of the air transmission device located above the battery pack to be perpendicular to the plane of the battery pack where the airtightness detection hole is located when the inflation port is pressed on the airtightness detection hole.

[0010] Further, the flexible positioning member includes a displacement rod and a rubber plug fixedly connected to one end of the displacement rod.

[0011] Further, the rubber plug is in a bowl shape, and the bottom of the bowl of the rubber plug is fixedly connected to the displacement rod by screws.

[0012] Further, the flexible positioning member is movably arranged on the bottom plate and the positioning plate; a positioning plate is vertically provided on the bottom plate; the positioning plate includes a cross plate and a longitudinal plate; the cross plate and the longitudinal plate are perpendicular to each other.

[0013] Further, a row of displacement channels for connecting the flexible positioning member are provided on the cross plate, the longitudinal plate and the bottom plate; threaded holes for positioning the flexible positioning member are provided on the cross plate, the longitudinal plate and the bottom plate and are communicated with the displacement channels; long bolts are fitted in the threaded holes.

[0014] Further, positioning holes for fixing the positioning plate and the main board are provided on the bottom plate; one end of the main board is fixed in the positioning holes, and the other end is slidably connected with an inflation device.

[0015] Further, a chute is provided on the top of the main board; a slider is slidably connected in the chute; the slider is fixedly connected with a front board; the front end of the front board is connected with an extension board through a connecting plate.

[0016] Further, the extension board is vertically arranged at the bottom of the connecting plate and extends above the battery pack to be detected; a plurality of displacement holes are provided on the extension board along its length direction; the inflation device is movably connected in the displacement holes.

[0017] Further, the inflation device includes a gas transmission rod movably arranged in a sleeve cup; a spring for pressing down the gas transmission rod when it moves upward is provided between the inner wall of the sleeve cup and the outer side of the gas transmission rod; the top of the gas transmission rod is connected with a trachea, and an inflation port for cooperating with the airtightness detection hole is provided at the bottom.

[0018] Further, the top of the spring is limited by the first limiting ring at the top of the sleeve cup, and the bottom is limited by the second limiting ring formed in the middle of the air transmission rod; the second limiting ring is smaller than the through hole at the center of the sleeve cup; the second limiting ring abuts against the stepped groove formed at the upper end of the displacement hole; a fixing plate for fixedly connecting to the upper end of the extension plate is provided on the outer periphery of the bottom of the sleeve cup.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of the present invention are as follows: The adaptive adjustment of the shape of the inflation port and the adjustment of the position of the battery pack to be tested are realized through the flexible positioning component, effectively improving the positioning effect and the detection accuracy, and it can be applicable to various different shapes of batteries, ensuring the positioning effect of the batteries. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is the three-dimensional view of the general tooling of the present invention;

[0023] Figure 2 is the three-dimensional view of the flexible positioning component of the present invention;

[0024] Figure 3 is the schematic view of the general tooling of the present invention;

[0025] Figure 4 is the partial enlarged cross-sectional view of the inflation device of the present invention;

[0026] Figure 5 is the reference view of the use state of the present invention;

[0027] Figure 6 is the cross-sectional view of the use state of the present invention; Detailed Embodiments

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example 1, please refer to Figures 1-6 as shown:

[0032] A general tooling structure for checking the air tightness of a product, including a bottom plate 100 for placing the battery pack 10 to be tested. A number of positioning holes 101 for fixing the positioning plate and the main board 200 are provided on the bottom plate 100. The positioning plate includes a horizontal plate 310 and a vertical plate 320. The horizontal plate 310 and the vertical plate 320 are perpendicularly arranged on the bottom plate 100. Taking the length direction of the bottom plate 100 as the X direction, the width direction as the Y direction, and the direction perpendicular to the bottom plate 100 as the Z direction. Shifting channels 102 are provided on the horizontal plate 310, the vertical plate 320, and the bottom plate 100. A row of Y-direction shifting channels penetrating the horizontal plate 310 is arranged along the X direction on the horizontal plate 310. A row of X-direction shifting channels penetrating the vertical plate 320 is arranged along the Y direction on the vertical plate 320. A row of Z-direction shifting channels penetrating the bottom plate 100 is arranged along the X direction on the bottom plate 100. At least one flexible positioning member 330 is movably connected in each shifting channel 102. Preferably, one flexible positioning member 330 is provided in the Y-direction shifting channel on the horizontal plate 310, and two flexible positioning members 330 are provided on both the vertical plate 320 and the bottom plate 100. The specific number of the flexible positioning members 330 can be appropriately changed according to the size of the battery to be tested.

[0033] The shifting channel 102 is one of conventional geometric shapes such as square, rectangle, triangle, circle, trapezoid, rhombus, etc. Preferably, other non-circular geometric shapes are helpful for the flexible positioning member 330 to move only along the channel direction in the shifting channel 102 without rotating itself, which can further improve the limiting ability.

[0034] The flexible positioning member 330 has a shifting rod 331 matching the shape of the shifting channel 102. One end of the shifting rod 331 is connected with a rubber plug 332 for flexibly cooperating with the battery pack 10 to be tested. The rubber plug 332 is in a bowl shape and is fixedly connected to the shifting rod 331 through a screw 333 at the bottom. When the rubber plug 332 presses against the battery pack 10 to be tested, the air inside is discharged due to the squeezing deformation of the rubber plug 332. When the pressing stops, it can adsorb on the battery pack 10 to be tested due to the atmospheric pressure, playing a role in fixing and limiting the battery pack 10 to be tested. On the other hand, due to the use of the bowl-shaped rubber plug 332, the negative pressure adsorption ability for the battery pack 10 to be tested is not particularly large. There is still air at the bottom of the rubber plug 332 close to the shifting rod 331. At the same time, due to the flexible nature of the rubber plug 332, after the battery pack 10 to be tested is fixed, it has a certain free movement space, enabling flexible limiting. The effect is that it can match different types of battery packs 10 to be tested. Especially when there are components such as connector outlets and explosion-proof valves on the surface of the battery pack 10 to be tested, causing the battery surface to be uneven, making it difficult to directly place it on a plane for air tightness detection. Through the flexible positioning member 330 of the present invention, various uneven positions can be effectively avoided, and the battery pack 10 to be tested can be effectively lifted and limited to ensure the flatness of the air tightness detection hole 11 at the top, improving the detection accuracy.

[0035] Furthermore, the flexible positioning member 330 can effectively improve the connection stability between the inflation port 401 and the airtightness detection hole 11, can adapt to the optimal docking position, avoid air leakage during vacuum pumping detection, and at the same time reduce the bending or uneven stress of the inflation port 401, ensure uniform force of the inflation port 401 in the Z direction, and adaptively adjust the force condition of the inflation port 401 through the flexible positioning member 330, ensure that the inflation port 401 is as parallel as possible to the plane where the airtightness detection hole 11 is located, and effectively improve the sealing effect and service life of the inflation port 401.

[0036] The displacement rod 331 is fixed by a long bolt 340. A row of threaded holes 103 corresponding to and communicating with the displacement channels 102 on the cross plate 310 are arranged along the X direction at the top of the cross plate 310. A row of threaded holes 103 corresponding to and communicating with the displacement channels 102 on the longitudinal plate 320 are arranged along the Y direction at the bottom of the longitudinal plate 320. A row of threaded holes 103 corresponding to and communicating with the displacement channels 102 on the bottom plate 100 are arranged along the X direction at the side of the bottom plate 100; the position of the displacement rod 331 in the displacement channel 102 is fixed by the long bolts 340 correspondingly arranged in the threaded holes 103.

[0037] A main board 200 is provided behind the transverse board 310, and a support board 202 is provided behind the main board 200. The support board is arranged along the Z direction and perpendicular to the main board 200. The bottom of the main board 200 is fixedly arranged on the bottom board 100 through positioning holes 101, and an air transmission device 400 is movably arranged at the top of the main board 200; the air transmission device 400 includes a sleeve cup 402; an air transmission rod 403 is movably arranged in the sleeve cup 402; a spring 404 is arranged in the cavity between the inner wall of the sleeve cup 402 and the outer wall of the air transmission rod 403; one end of the spring 404 is limited by a first limiting ring 405 at the upper end of the sleeve cup 402, and the other end is limited by a second limiting ring 406 formed in the middle of the air transmission rod 403. The second limiting ring 406 can slide in the through hole at the center of the sleeve cup 402. The second limiting ring 406 is clamped in a step groove 232 at the upper end of a displacement hole 231 provided on an extension board 230. The air transmission rod 403 below the second limiting ring 406 can move up and down in the displacement hole 231. An fixing plate 407 for fixedly connecting to the upper end of the extension board 230 is provided on the outer periphery of the bottom of the sleeve cup 402. Preferably, two fixing plates 407 are symmetrically arranged to improve the fixing stability, so that the air transmission rod 403 can move up and down in the displacement hole 231 conveniently, and the spring 404 provides a restoring force. A plurality of displacement holes 231 are provided in the length direction of the extension board 230, which can facilitate the air transmission device 400 to change the fixing position, so as to adapt to the detection of batteries of more sizes. The top of the air transmission rod 403 is connected to a reversing valve 409 through an air pipe 408, and then connected to a detection device through the reversing valve 409. By changing the air inlet mode through the reversing valve 409, the airtightness detection in the form of vacuum pumping or the airtightness detection in the form of inflation can be realized in cooperation with the detection device, meeting the requirements of various working conditions. The bottom of the air transmission rod 403 is connected to an air inlet 401 for connecting to an airtightness detection hole 11 on the battery pack 10 to be tested.

[0038] One end of the extension board 230 is connected to a connecting board 220. The extension board 230 is vertically connected to the connecting board 220. The connecting board 220 is connected to a front board 210 at the back through screws; a slider 211 is provided on the back of the front board 210, and the slider 211 is slidably connected to a chute 201 provided at the top of the main board 200, so that the position of the air transmission device 400 in the X direction can be conveniently adjusted.

[0039] Working principle: When the bottom of the battery pack 10 to be tested is relatively flat, first place the battery pack 10 to be tested on the bottom plate 100, and press the two sides of the battery pack 10 to be tested against the flexible positioning components 330 on the cross plate 310 and the longitudinal plate 320. Then, slightly press the bottom of the battery pack 10 to be tested against the rubber plug 332 on the bottom plate 100 to adsorb the battery pack 10 to be tested. The two sides can be selectively squeezed to adsorb it on the cross plate 310 or the longitudinal plate 320 according to the situation, so as to achieve flexible positioning. Further, pull up the air transmission rod 403 and move the air transmission device 400 to above the airtightness detection hole 11 through the slider 211. Release the air transmission rod 403, and the spring 404 presses the air transmission rod 403 downward, so that the air inlet 401 presses on the airtightness detection hole 11 to achieve a sealing effect. At the same time, the downward pressure exerted by the spring can also effectively perform adaptive adjustment. Due to the downward pressure of the spring, it is further applied above the battery pack 10 to be tested. Since the bottom of the battery pack 10 to be tested is fixed and supported by two flexible positioning components 330 on the same straight line, it has the possibility of rotating in the Y direction and the X direction. When the air inlet 401 is pressed downward, the adaptive adjustment is completed, and the air inlet 401 and the airtightness detection hole 11 are in a flat state relative to each other, avoiding uneven stress on each part of the air inlet 401 when pressing down, resulting in creases, bends, etc. and causing air leakage, thereby effectively improving the airtightness effect and extending the service life of the air inlet 401. There are also flexible positioning components 330 on the side on the same straight line for auxiliary support, which not only ensures the stability of the battery pack 10 to be tested but also gives it a certain degree of freedom, and at the same time can avoid problems such as unevenness caused by the interfaces on different battery packs 10 to be tested and inconvenient fixation.

[0040] When the bottom of the battery pack 10 to be tested has a groove and cannot be fixed, such as Figure 6 shown, at this time, the flexible positioning component 330 on the cross plate 310 acts as the main fixing, and the flexible positioning components 330 on the longitudinal plate 320 and the bottom plate 100 act as auxiliary positioning. By squeezing forcefully, the side of the battery pack 10 to be tested is adsorbed on one side of the cross plate 310. When the air inlet 401 is pressed downward under the pressure of the spring 404, the battery pack 10 to be tested also has sufficient freedom to adjust the relative flatness of the contact surface between the air inlet 401 and the airtightness detection hole 11. Similarly, by setting multiple flexible positioning components 330 on the longitudinal plate 320, flexible positioning of the battery pack 10 to be tested can also be carried out.

[0041] In another usage mode, the flexible positioning member 330 is usually fixed by the long bolt 340. However, when it is inconvenient to fix the bottom of the battery pack 10 to be tested and the fixing firmness is insufficient only by fixing it unilaterally on the transverse plate 310 or the longitudinal plate 320, it can be fixed on one side of the transverse plate 310 or the longitudinal plate 320 first, then the long bolt 340 on the other positioning plate is loosened, and the flexible positioning member 330 is manually squeezed onto the battery pack 10 to be tested for fixing, and then the displacement rod 331 is fixed by the long bolt 340. As a result, the flexible positioning members 330 on the transverse plate 310 and the longitudinal plate 320 are both flexibly connected to the battery pack 10 to be tested. However, at the same time, the battery pack 10 to be tested still has the freedom of rotation in the X direction and the freedom of rotation in the Y direction after being fixed, and it can still meet the compensation for the tilting deformation caused by the downward pressure of the inflation port 401.

[0042] Compared with the traditional method, corresponding molds are required for specific batteries for limit positioning. At the same time, the battery pack basically loses the freedom of rotation after being limited, and the connection of the air transmission device 400 is also a problem, making it difficult to meet the requirements of various batteries, different shapes, and different airtightness detections. The tooling invented can effectively solve this problem and meet the airtightness detections of products with different shapes, that is, it can perform airtightness detections by evacuating to a vacuum or in the form of inflation.

[0043] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A general tooling structure for checking the airtightness of a product, Characterized in that: It includes a flexible positioning component provided on at least one surface of the battery pack to be detected, which is used to flexibly position the battery pack and adaptively adjust to keep the inflation port of the air transmission device located above the battery pack perpendicular to the plane of the battery pack where the airtightness detection hole is located when the inflation port presses on the airtightness detection hole; the flexible positioning component includes a displacement rod and a rubber plug fixedly connected to one end of the displacement rod; the rubber plug is bowl-shaped, and the bottom of the bowl of the rubber plug is fixedly connected to the displacement rod by screws; the flexible positioning component is movably arranged on the bottom plate and the positioning plate; a positioning plate is vertically arranged on the bottom plate; the positioning plate includes a horizontal plate and a vertical plate; the horizontal plate and the vertical plate are perpendicular to each other; a row of displacement channels for connecting the flexible positioning component are arranged on the horizontal plate, the vertical plate and the bottom plate; threaded holes for positioning the flexible positioning component are arranged on the horizontal plate, the vertical plate and the bottom plate and are communicated with the displacement channels; long bolts are fitted in the threaded holes.

2. A general tooling structure for checking the airtightness of a product according to claim 1, Characterized in that: Positioning holes for fixing the positioning plate and the main board are arranged on the bottom plate; one end of the main board is fixed in the positioning hole, and the other end is slidably connected with an inflation device.

3. A general tooling structure for checking the airtightness of a product according to claim 2, Characterized in that: A chute is arranged on the top of the main board; a slider is slidably connected in the chute; the slider is fixedly connected with the front board; the front end of the front board is connected with an extension board through a connecting plate.

4. A general tooling structure for checking the airtightness of a product according to claim 3, Characterized in that: The extension board is vertically arranged at the bottom of the connecting plate and extends above the battery pack to be detected; a plurality of displacement holes are arranged along the length direction of the extension board; the inflation device is movably connected in the displacement holes.

5. A general tooling structure for checking the airtightness of a product according to any one of claims 2-4, Characterized in that: The inflation device includes a gas transmission rod movably arranged in a sleeve cup; a spring for pressing down the gas transmission rod when it moves upward is arranged between the inner wall of the sleeve cup and the outer side of the gas transmission rod; the top of the gas transmission rod is connected with a trachea, and the bottom is provided with an inflation port matched with the airtightness detection hole.

6. A general tooling structure for checking the airtightness of a product according to claim 5, Characterized in that: The top of the spring is limited by the first limiting ring at the top of the sleeve cup, and the bottom is limited by the second limiting ring formed in the middle of the gas transmission rod; the second limiting ring is smaller than the through hole in the center of the sleeve cup; the second limiting ring abuts against the step groove formed at the upper end of the displacement hole; a fixing plate for fixedly connecting to the upper end of the extension board is arranged on the outer periphery of the bottom of the sleeve cup.

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