Air tightness test tool and test equipment

Abstract

The utility model relates to the technical field of battery testing, in particular to an air tightness testing tool and testing device.The air tightness testing tool comprises a first clamp, a second clamp and an adjusting part, the second clamp and the first clamp are oppositely arranged, and the first clamp and the second clamp can be close to each other or away from each other; the first clamp abuts against the second clamp, so that an accommodating cavity is formed between the first clamp and the second clamp, and the accommodating cavity is used for accommodating a to-be-tested battery; and the adjusting part is arranged on the inner wall of the accommodating cavity and is used for abutting against the outer surface of the battery to be tested. The adjusting part is arranged in the accommodating cavity and can abut against the outer surface of the to-be-detected battery, so that the to-be-detected battery is clamped and limited, the cylindrical battery with the diameter meeting the set range can be clamped, the universality of the clamp is improved, meanwhile, the to-be-detected battery can be prevented from shaking in the accommodating cavity, and the detection accuracy is improved. The to-be-tested battery is kept stable in the air tightness testing process, and the testing effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery testing, and particularly to an airtightness testing tooling and a testing device. Background Art

[0002] Cylindrical batteries are batteries with high capacity, long cycle life, and wide operating temperature range. They are divided into different systems such as lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide, cobalt-manganese mixture, and ternary materials. Their outer shells are all made of steel shells, so they have a wide market distribution range, and batteries of different material systems have different advantages.

[0003] Currently, the fixtures used for sealing tests on cylindrical batteries are designed for batteries of a specific size, so they are no longer applicable to batteries of other diameters, and thus the universality of the fixtures is poor. Summary of the Utility Model

[0004] The present application provides an airtightness testing tooling and a testing device to solve the problem of poor universality of the fixtures used for sealing tests on cylindrical batteries in the prior art.

[0005] On the one hand, the present application provides an airtightness testing tooling, including:

[0006] A first fixture;

[0007] A second fixture, disposed opposite to the first fixture, the first fixture and the second fixture can approach or separate from each other, and the first fixture forms a receiving cavity with the second fixture by abutting against the second fixture, and the receiving cavity is used to receive the battery to be tested;

[0008] An adjusting part, disposed on the inner wall of the receiving cavity, and the adjusting part is used to abut against the outer surface of the battery to be tested.

[0009] In one possible design, the adjusting part includes:

[0010] An elastic member, disposed on the inner wall of the receiving cavity;

[0011] A pressing member, connected to the elastic member, and used to abut against the outer surface of the battery to be tested.

[0012] In one possible design, the pressing member is an elastic pad, and the elastic pad can abut against the outer surface of the battery to be tested by bending deformation on the side close to the battery to be tested.

[0013] In one possible design, the elastic member includes:

[0014] An inner column, installed on the inner wall of the receiving cavity;

[0015] An outer sleeve, disposed at the end of the inner column, and the inner wall of the outer sleeve is in clearance fit with the outer wall of the inner column;

[0016] The adjusting spring is arranged inside the outer sleeve, with one end connected to the inner column and the other end connected to the outer sleeve, and it can expand and contract along the axial direction of the inner column.

[0017] In one possible design, through holes are respectively formed in the first fixture and the second fixture, and fixing nuts are respectively arranged on the outer surfaces of the first fixture and the second fixture corresponding to the through holes. The end of the inner column away from the adjusting spring sequentially passes through the through hole and the fixing nut.

[0018] In one possible design, there are two adjusting parts. One adjusting part is arranged on the inner wall of the first fixture, and one adjusting part is arranged on the inner wall of the second fixture.

[0019] In one possible design, the accommodating cavity is a cylindrical cavity.

[0020] In one possible design, the airtightness test tooling further includes:

[0021] A fixed seat;

[0022] A first driving arm is rotatably installed on the fixed seat, connected to the first fixture, and can drive the first fixture to rotate around the first axis;

[0023] A second driving arm is rotatably installed on the fixed seat, connected to the second fixture, and can drive the second fixture to rotate around the second axis so that the second fixture abuts against / separates from the first fixture.

[0024] In one possible design, the airtightness test tooling further includes a vision camera, and the vision camera is arranged on the fixed seat.

[0025] On the other hand, the present application also provides an airtightness test device, including the airtightness test tooling as described above.

[0026] The beneficial effects of the present application are as follows:

[0027] For the airtightness test tooling of the present application, by setting the first fixture and the second fixture, an accommodating cavity is formed between the first fixture and the second fixture after they abut against each other, and the battery to be tested can be placed in the accommodating cavity for airtightness test; by arranging an adjusting part in the accommodating cavity, the adjusting part can abut against the outer surface of the battery to be tested, so as to clamp the battery to be tested and realize the limitation of the battery to be tested, thereby being able to clamp cylindrical batteries with diameters within a set range, improving the universality of the fixture, and at the same time being able to prevent the battery to be tested from shaking in the accommodating cavity, keeping the battery to be tested stable during the airtightness test, and improving the test effect.

[0028] For the airtightness test device provided by the present application, since it includes the airtightness test tooling in the present application, it simultaneously includes all the above-mentioned advantages of the airtightness test tooling. Brief Description of the Drawings

[0029] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a structural schematic diagram of an airtightness test tooling provided by an embodiment of the present application;

[0031] Figure 2 It is another structural schematic diagram of an airtightness test tooling provided by an embodiment of the present application;

[0032] Figure 3 It is an assembly drawing of the first fixture and the second fixture of the airtightness test tooling provided by an embodiment of the present application;

[0033] Figure 4 It is an internal structural diagram of the first fixture / second fixture of the airtightness test tooling provided by an embodiment of the present application;

[0034] Figure 5 It is another internal structural diagram of the first fixture / second fixture of the airtightness test tooling provided by an embodiment of the present application;

[0035] Figure 6 It is a structural schematic diagram of the elastic member of the airtightness test tooling provided by an embodiment of the present application.

[0036] Reference Numerals:

[0037] 110, the first fixture; 120, the second fixture; 130, the accommodation cavity; 200, the adjustment part; 210, the elastic member; 212, the inner column; 213, the outer sleeve; 214, the adjustment spring; 220, the pressing member; 300, the fixing nut; 400, the fixing seat; 510, the first driving arm; 511, the mounting hole; 512, the locking nut; 520, the second driving arm; 600, the vision camera. Detailed Description of the Embodiments

[0038] The following will clearly and completely describe the technical solutions of the present application in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] The following will be combined with Figures 1-6, which describes the airtightness test tooling provided in the embodiments of the present application.

[0040] Referring to Figure 3 As shown, in some embodiments provided by the present application, the airtightness test tooling includes a first fixture 110, a second fixture 120, and an adjustment part 200. The second fixture 120 is disposed opposite to the first fixture 110. The first fixture 110 and the second fixture 120 can approach or separate from each other. The first fixture 110 forms a receiving cavity 130 between the first fixture 110 and the second fixture 120 by abutting against the second fixture 120. The receiving cavity 130 is used to receive the battery under test. The adjustment part 200 is disposed on the inner wall of the receiving cavity 130 and is used to abut against the outer surface of the battery under test. In some specific embodiments, the receiving cavity 130 is a cylindrical cavity. Specifically, both the first fixture 110 and the second fixture 120 are semi-cylindrical. The inner cavities of the first fixture 110 and the second fixture 120 are both semi-cylindrical cavities. A first plane is formed on the outer surface of the first fixture 110, and a second plane is formed on the outer surface of the second fixture 120. After the first fixture 110 and the second fixture 120 approach each other and the first plane abuts against the second plane, the two semi-cylindrical cavities jointly form a cylindrical cavity. By designing the receiving cavity 130 as a cylindrical cavity, it can better approximate the shape of the cylindrical battery. After the cylindrical battery is placed in the receiving cavity 130, it can avoid shaking and improve the stability of the test. In other specific embodiments, the receiving cavity 130 can also be designed in other shapes, such as a rectangular parallelepiped cavity or a cube cavity, etc. In some specific embodiments, the number of the adjustment parts 200 disposed in the receiving cavity 130 is at least one. For example, the number of the adjustment parts 200 disposed in the receiving cavity 130 is two. One adjustment part 200 is disposed at a position on the inner wall of the first fixture 110 far from the second fixture 120, and the other adjustment part 200 is disposed at a position on the inner wall of the second fixture 120 far from the first fixture 110. That is to say, the two adjustment parts 200 are symmetrically disposed. By squeezing the opposite sides of the cylindrical battery by the two adjustment parts 200, the clamping of the cylindrical battery is realized.

[0041] Using the technical solutions in the above embodiments, by providing the first fixture 110 and the second fixture 120, a receiving cavity 130 is formed between the first fixture 110 and the second fixture 120 after the first fixture 110 abuts against the second fixture 120, and the battery under test can be placed in the receiving cavity 130 for airtightness testing. By providing the adjustment part 200 in the receiving cavity 130, the adjustment part 200 can abut against the outer surface of the battery under test, so as to clamp the battery under test to realize the limiting of the battery under test, so that the cylindrical battery with a diameter within the set range can be clamped, improving the universality of the fixture. At the same time, it can prevent the battery under test from shaking in the receiving cavity 130, keep the battery under test stable during the airtightness test, and improve the test effect.

[0042] Referring to Figure 4 and Figure 5 as shown, in some embodiments provided by the present application, the adjusting portion 200 includes an elastic member 210 and a pressing member 220. The elastic member 210 is disposed on the inner wall of the accommodating cavity 130; the pressing member 220 is connected to the elastic member 210 and is used to abut against the outer surface of the battery under test. In some specific embodiments, the elastic member 210 is a spring and the pressing member 220 is plate-shaped. When the cylindrical battery is not placed in the accommodating cavity 130, the elastic member 210 naturally extends and the pressing member 220 is located at the initial position; after the cylindrical battery is placed in the accommodating cavity 130, under the extrusion of the cylindrical battery, the elastic member 210 contracts and the pressing member 220 moves from the initial position in a direction away from the cylindrical battery until the side wall of the cylindrical battery is tightly squeezed between the two pressing members 220, realizing the limitation of the cylindrical battery; it should be noted that when the pressing member 220 is located at the initial position, the distance between the two pressing members 220 is smaller than the diameter of the cylindrical battery, so as to ensure that the elastic member 210 has a certain amount of compression and can provide an elastic force to the cylindrical battery.

[0043] Referring to Figure 5 as shown, in some embodiments of the present application, the pressing member 220 is an elastic pad, and the elastic pad can make the side surface close to the battery under test abut against the outer surface of the battery under test by undergoing a bending deformation. In some specific embodiments, the elastic pad is a soft pad capable of undergoing elastic deformation, such as a rubber pad, etc.; when the elastic pad is located at the initial position, the outer edge of the elastic pad just contacts the inner wall of the cylindrical cavity. During the process of the elastic pad moving from the initial position in a direction away from the cylindrical battery, the outer edge of the elastic pad bends due to being restricted by the inner wall of the cylindrical cavity, causing the elastic pad to undergo a bending deformation and gradually form an arc-shaped pad, and at least a part of the arc-shaped pad can abut against the outer surface of the cylindrical battery, that is to say, at least a part of the arc-shaped pad can wrap around the outer surface of the cylindrical battery, so as to limit the cylindrical battery in multiple radial directions and improve the stability of the battery under test during the airtightness test.

[0044] Referring to Figure 6As shown, in some embodiments of the present application, the elastic member 210 includes an inner column 212, an outer sleeve 213, and an adjusting spring 214. The inner column 212 is installed on the inner wall of the accommodating cavity 130. For example, the inner column 212 is welded to the inner wall of the accommodating cavity 130. The outer sleeve 213 is disposed at the end of the inner column 212. There is a clearance fit between the inner wall of the outer sleeve 213 and the outer wall of the inner column 212. The outer sleeve 213 is adhesively bonded or bolt-fixed to the pressing member 220. The adjusting spring 214 is disposed inside the outer sleeve 213. One end of the adjusting spring 214 is connected to the inner column 212, and the other end of the adjusting spring 214 is connected to the outer sleeve 213. The adjusting spring 214 can expand and contract along the axial direction of the inner column 212. By sliding the outer sleeve 213 along the axial direction of the inner column 212, the pressing member 220 can be moved closer to or farther away from the battery under test. In some specific embodiments, a first convex edge is provided radially at the end of the inner column 212, and a second convex edge is provided radially at a position near the end of the inner wall of the outer sleeve 213. When the outer sleeve 213 slides axially on the inner column 212, the first convex edge can block the second convex edge, thereby preventing the outer sleeve 213 from slipping off the inner column 212.

[0045] Referring to Figure 3 As shown, in some embodiments of the present application, through holes are respectively formed in the first fixture 110 and the second fixture 120. Fixing nuts 300 are respectively disposed on the outer surfaces of the first fixture 110 and the second fixture 120 corresponding to the through holes. The fixing nuts 300 are welded to the first fixture 110 and the second fixture 120. The middle holes of the fixing nuts 300 correspond to the through holes. One end of the inner column 212 away from the adjusting spring 214 sequentially passes through the through hole and the fixing nut 300. An external thread is provided at one end of the inner column 212 close to the fixing nut 300, so that the inner column 212 is threadedly connected to the fixing nut 300. It should be noted that due to the different diameters of the batteries under test, after the batteries under test with different diameters are placed in the accommodating cavity 130, the positions of the pressing members 220 are also different. Thus, by threadedly connecting the inner column 212 to the fixing nut 300, the initial position of the pressing member 220 can be adjusted by rotating the inner column 212, so as to ensure that after the batteries under test with different diameters are placed in the accommodating cavity 130, the elastic member 210 can generate an appropriate compression amount, thereby ensuring that the elastic member 210 can provide an appropriate magnitude of elastic force to the cylindrical battery, and improving the stability of the battery under test without damaging it.

[0046] Referring to Figure 1 、 Figure 2As shown, in some embodiments provided by the present application, the airtightness test tooling further includes a fixed seat 400, a first driving arm 510, and a second driving arm 520. The first driving arm 510 is rotatably mounted on the fixed seat 400 through a rotating shaft. The first driving arm 510 is connected to the first fixture 110, and the first driving arm 510 can drive the first fixture 110 to rotate around the first axis. The second driving arm 520 is rotatably mounted on the fixed seat 400 through a rotating shaft. The second driving arm 520 is connected to the second fixture 120, and the second driving arm 520 can drive the second fixture 120 to rotate around the second axis to make the second fixture 120 abut against / separate from the first fixture 110. Specifically, the first driving arm 510 and the second driving arm 520 are pneumatic clamping arms. Mounting holes 511 are respectively provided on the first driving arm 510 and the second driving arm 520. One end of the inner column 212 far from the adjusting spring 214 sequentially passes through the through hole, the fixing nut 300, the mounting hole 511 and is fixed by a locking nut 512. The locking nut 512 is provided with an internal hexagonal hole, which is convenient for screwing the inner column 212. The first driving arm 510 and the second driving arm 520 drive the first fixture 110 and the second fixture 120 to rotate, which can make the second fixture 120 approach or move away from the first fixture 110. When the second fixture 120 approaches the first fixture 110 until they abut against each other, the accommodating cavity 130 is closed. When the second fixture 120 moves away from the first fixture 110, the accommodating cavity 130 is opened.

[0047] Referring to Figure 1 As shown, in some embodiments provided by the present application, the airtightness test tooling further includes a vision camera 600, and the vision camera 600 is arranged on the fixed seat 400. Specifically, the vision camera 600 is electrically connected to the processor. The vision camera 600 can capture an image of the battery under test and transmit it to the processor, and the processor uses image processing technology to process and analyze the image, so as to obtain the size information of the object. In this way, by setting the vision camera 600, the size of the battery under test can be measured through computer vision and image processing technology. Thus, before placing the battery under test into the accommodating cavity 130, the position of the pressing member 220 in the accommodating cavity 130 can be pre-adjusted in advance, ensuring that after batteries under test with different diameters are placed into the accommodating cavity 130, the elastic member 210 can generate an appropriate compression amount, so as to ensure that the elastic member 210 can provide an appropriate elastic force to the cylindrical battery, improving the stability of the battery under test without damaging it.

[0048] The working process of the airtightness test tooling provided by the embodiments of the present application:

[0049] After the vision camera 600 determines the size of the battery under test, the inner column 212 is rotated by screwing the locking nut 512 to adjust the pressing member 220 to a suitable position;

[0050] The first driving arm 510 and the second driving arm 520 respectively correspond to driving the first fixture 110 and the second fixture 120 for the first time, so that the first fixture 110 and the second fixture 120 move away from each other, and the battery under test is placed into the accommodation cavity 130.

[0051] The first driving arm 510 and the second driving arm 520 respectively correspond to driving the first fixture 110 and the second fixture 120 for the second time, so that the first fixture 110 and the second fixture 120 move closer to each other. During the closing process of the accommodation cavity 130, the battery under test presses against the pressing member 220. Under the restriction of the arc-shaped inner wall of the accommodation cavity 130, the pressing member 220 generates a bending deformation, so that the pressing member 220 abuts against the outer surface of the battery under test in a form covering the outer surface of the battery under test, and the battery under test waits for airtightness testing.

[0052] An airtightness testing device is further provided in an embodiment of the present application, including the airtightness testing tooling in the above embodiment.

[0053] It should be noted that the airtightness testing device includes the airtightness testing tooling, and thus includes all the above advantages of the airtightness testing tooling, which will not be elaborated here.

[0054] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 thus should not be construed as a limitation to the present application.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0056] In this application, unless otherwise clearly specified and defined, terms such as "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations to this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. An air tightness test tool, characterized in that: include: First clamp; A second fixture is arranged opposite to the first fixture, the first fixture and the second fixture can be close to or away from each other, the first fixture abuts against the second fixture to form a receiving cavity between the first fixture and the second fixture, and the receiving cavity is used to receive the battery to be tested; The adjusting portion is arranged on the inner wall of the accommodating cavity, and the adjusting portion is used to abut against the outer surface of the battery to be tested.

2. The airtightness test tool according to claim 1, characterized in that: The adjustment unit comprises: An elastic member, arranged on the inner wall of the accommodating cavity; The pressing member is connected to the elastic member and is used for abutting against the outer surface of the battery to be tested.

3. The airtightness test tool according to claim 2, characterized in that: The pressing member is an elastic pad, and the elastic pad can bend and deform to make a side surface close to the battery to be tested abut against the outer surface of the battery to be tested.

4. The airtightness test tool according to claim 3, characterized in that: The elastic member comprises: An inner column, mounted on the inner wall of the accommodating cavity; An outer sleeve is arranged at the end of the inner column, and the inner wall of the outer sleeve is clearance-matched with the outer wall of the inner column; An adjusting spring is arranged in the outer sleeve, one end of which is connected to the inner column and the other end of which is connected to the outer sleeve, and can be extended and retracted along the axial direction of the inner column.

5. The airtightness test tool according to claim 4, characterized in that: The first clamp and the second clamp are respectively provided with through holes, and the outer surfaces of the first clamp and the second clamp are respectively provided with fixing nuts corresponding to the through holes, and the end of the inner column away from the adjustment spring passes through the through hole and the fixing nut in sequence.

6. The airtightness test tool according to claim 1, characterized in that: The adjusting parts include two, one of which is arranged on the inner wall of the first clamp, and the other is arranged on the inner wall of the second clamp.

7. The airtightness test tool according to any one of claims 1 to 6, characterized in that: The accommodating cavity is a cylindrical cavity.

8. The air tightness test tool according to any one of claims 1 to 6, characterized in that: Also includes: Fixed seat; A first driving arm is rotatably mounted on the fixing seat, connected to the first clamp, and capable of driving the first clamp to rotate around a first axis; The second driving arm is rotatably mounted on the fixing seat and connected to the second clamp, and can drive the second clamp to rotate around a second axis so that the second clamp abuts against / is separated from the first clamp.

9. The airtightness test tool according to claim 8, characterized in that: It also includes a visual camera, which is arranged on the fixing seat.

10. An airtightness testing device, characterized in that: The invention comprises the airtightness testing tool as described in any one of claims 1 to 9.

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