Explosion testing device for battery cell
By designing a fixture that avoids the top cover of the battery cell and a sealed air intake pipe, the problem of inaccurate battery cell test results is solved, and more accurate test results and lower test costs are achieved.
Patent Information
- Application Number
- CN202422009354.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-19
AI Technical Summary
In the prior art, during battery cell testing, the fixture restricts the deformation of the battery cell top cover, resulting in inaccurate test results, which cannot truly reflect the welding strength and voltage resistance.
A burst testing device was designed, and the fixture avoided the battery cell top cover and was sealed and connected to the air intake pipe through an inflator, allowing the battery cell top cover to be freely deformed, and the test environment is consistent with the actual use state.
Improve the accuracy of the battery cell test results, avoid the clamp affecting the deformation of the top cover, ensure that the test results are consistent with the actual use environment, reduce the testing cost and extend the service life of the inflator.
Smart Images
Figure CN223078082U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of testing devices, in particular to a pull - explosion testing device for battery cells. Background Art
[0002] To ensure the airtightness requirements of battery cells during manufacturing and use, it is necessary to test and verify the welding strength of the battery cells manufactured on the production line and the internal air pressure bearing capacity of the battery cell structural components. Specifically, it is necessary to test sensitive positions such as the laser welding strength of the battery cell top cover, the welding strength of the liquid injection hole sealing nail, and the pressure resistance of the top cover pole column. During the test, it is necessary to inflate the battery cell and place the whole battery cell in water. After filling enough gas, observe whether there is air leakage at the sensitive positions.
[0003] In the related art, during the test, the battery cell is placed in a fixture, and the fixture wraps the whole battery cell. Especially at the position of the fixture corresponding to the top cover of the battery cell, there is a mounting plate for fixing the air charging pipe. The mounting plate contacts the top cover of the battery cell and will limit the deformation of the top cover of the battery cell during the test. However, in the actual application of the battery cell, there is no corresponding structure for restricting deformation at the top cover position of the battery cell. When the battery cell generates gas and produces a large pressure, the middle position at the top will bulge, generating an arc - shaped deformation, so that a deformation gap is generated between the cover pole column and the top cover, resulting in an air leakage problem. The deformation of the top cover of the battery cell is restricted by the mounting plate during the test, resulting in the inconsistent state of the top cover of the battery cell during the test and its actual application state, so the true welding strength and pressure resistance of the sensitive positions of the battery cell cannot be measured, and the test results are inaccurate.
[0004] Therefore, how to solve the problem of inaccurate test results existing in the prior art when testing battery cells has become an important technical problem to be solved by those skilled in the art. Content of the Utility Model
[0005] The utility model provides a pull - explosion testing device for battery cells to alleviate or solve the defect of inaccurate test results existing in the prior art when testing battery cells.
[0006] The utility model provides a pull - explosion testing device for battery cells, including:
[0007] A fixture for accommodating the battery cell to be tested, and an opening is provided at one end of the fixture corresponding to the top cover of the battery cell to be tested, and the shape and size of the opening are both adapted to the top cover of the battery cell to be tested;
[0008] An air - charging machine with an air - charging pipe, and the air - charging pipe is suitable for being hermetically connected to the air - charging port opened on the top cover of the battery cell to be tested.
[0009] According to the pull - explosion testing device for battery cells provided by the utility model, it further includes:
[0010] An air inlet pipe, the first end of the air inlet pipe is detachably connected to the charging pipe, and the second end of the air inlet pipe is adapted to be inserted into the inflation port and adhesively sealed with the side wall of the inflation port.
[0011] A pull explosion test device for a battery cell according to the present invention, wherein the air inlet pipe is made of polyurethane.
[0012] A pull explosion test device for a battery cell according to the present invention, wherein the outer diameter of the air inlet pipe is smaller than the outer diameter of the charging pipe.
[0013] A pull explosion test device for a battery cell according to the present invention further includes:
[0014] An adapter, having a first interface and a second interface, the first interface is connected to the charging pipe, and the second interface is detachably connected to the air inlet pipe.
[0015] A pull explosion test device for a battery cell according to the present invention, wherein the outer diameter of the air inlet pipe is 5 to 7 millimeters.
[0016] A pull explosion test device for a battery cell according to the present invention, wherein the outer diameter of the air inlet pipe is 6 millimeters.
[0017] A pull explosion test device for a battery cell according to the present invention, wherein the second interface is snap-connected to the air inlet pipe, or the second interface is threadedly connected to the air inlet pipe.
[0018] A pull explosion test device for a battery cell according to the present invention, wherein the fixture includes:
[0019] Side plates, the number of the side plates is the same as the number of side walls of the battery cell to be tested, and each of the side plates is connected to form a cylindrical structure, and the cross-sectional shape of the cylindrical structure is adapted to the battery cell to be tested;
[0020] A bottom plate, disposed at one end of the cylindrical structure, and each of the side plates is fixedly connected to the bottom plate.
[0021] A pull explosion test device for a battery cell according to the present invention, wherein any two adjacent ones of the side plates and the bottom plate are connected together by bolts.
[0022] The blasting test device for battery cells provided by the present utility model includes a fixture and an inflator. The fixture is used to accommodate the battery cell to be tested. One end of the fixture corresponding to the top cover of the battery cell to be tested is provided with an opening, and the shape and size of the opening are both adapted to the top cover of the battery cell to be tested. The battery cell to be tested is placed in the fixture, and the fixture completely avoids the top cover of the battery cell to be tested. During the test process, the fixture will not affect the deformation of the top cover of the battery cell to be tested. The inflator has an inflation pipe, and the inflation pipe is used for sealing connection with the inflation port opened on the top cover of the battery cell to be tested. Through the inflator, gas can be filled into the interior of the battery cell to be tested, so that the interior of the battery cell to be tested reaches a certain pressure for testing. With such a setting, the battery cell to be tested is placed in the fixture, and the fixture completely avoids the top cover of the battery cell to be tested. The fixture will not affect the deformation of the top cover of the battery cell to be tested, improving the consistency between the test environment of the battery cell to be tested and the actual environment during use, which is beneficial to improving the accuracy of the test results of the battery cell to be tested, and alleviating or solving the problem of inaccurate test results existing in the prior art when testing battery cells. Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0024] Figure 1 It is a partial structural schematic diagram when the blasting test device for battery cells provided by the present utility model is connected to the battery cell to be tested.
[0025] Reference Signs:
[0026] 1. Fixture; 2. Top Cover; 3. Inflation Pipe; 4. Inlet Pipe; 5. Adapter; 6. Explosion-proof Valve; 7. Terminal. Detailed Embodiments
[0027] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model in conjunction with the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model belong to the scope of protection of the present utility model.
[0028] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model 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 to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0029] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it 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. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.
[0030] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.
[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 the embodiments of the present utility model. In this specification, the schematic representations 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.
[0032] The following is combined with Figure 1 Describe the pull - explosion test device for the battery cell of the present utility model.
[0033] like Figure 1 As shown, the explosion test device for a battery cell provided by an embodiment of the utility model comprises a fixture 1 and an inflator.
[0034] Specifically, the fixture 1 is used to accommodate the battery cell to be tested, and an opening is provided at one end of the fixture 1 corresponding to the top cover 2 of the battery cell to be tested, and the shape and size of the opening are adapted to the top cover 2 of the battery cell to be tested.
[0035] The battery cell to be tested is placed in the fixture 1, which covers the side wall and bottom wall of the battery cell to be tested as a whole, thereby avoiding the problem of overall explosion caused by large-area bulging of the bottom wall and side wall of the battery cell to be tested. The fixture 1 completely avoids the top cover 2 of the battery cell to be tested, and the fixture 1 will not affect the deformation of the top cover 2 of the battery cell to be tested during the test.
[0036] The inflator has an inflating tube 3, which is used to be sealed and connected to the inflating port of the top cover 2 of the battery cell to be tested. The inflator can be used to fill gas into the battery cell to be tested so that the inside of the battery cell to be tested reaches a certain pressure for testing.
[0037] With such arrangement, the battery cell to be tested is placed in the fixture 1, and the fixture 1 completely avoids the top cover 2 of the battery cell to be tested. The fixture 1 will not affect the deformation of the top cover 2 of the battery cell to be tested, thereby improving the consistency between the test environment of the battery cell to be tested and the actual environment when it is put into use, which is beneficial to improving the accuracy of the test results of the battery cell to be tested, and alleviating or solving the problem of inaccurate test results when testing the battery cell in the prior art.
[0038] In the embodiment of the utility model, the explosion test device for the battery cell further includes an air intake pipe 4 .
[0039] The air inlet pipe 4 is arranged at the air outlet of the charging tube, and the first end of the air inlet pipe 4 is detachably connected to the charging tube 3. The second end of the air inlet pipe 4 is used to be inserted into the charging port on the top cover 2 of the battery cell to be tested, and is glued and sealed with the side wall of the charging port.
[0040] In this arrangement, the air intake pipe 4 replaces the air intake pipe 3 of the inflator and is glued and sealed with the top cover 2 of the battery cell to be tested. When the inflator needs to be detached from the battery cell to be tested after the test is completed, the air intake pipe 3 of the inflator can be disconnected from the air intake pipe 4. The detachment process will not damage the air intake pipe 3 of the inflator, which is conducive to extending the service life of the inflator. As a consumable, the air intake pipe 4 can be directly discarded after completing a test. In the next test, a new air intake pipe 4 can be connected to the air intake pipe 3 of the inflator.
[0041] In a further embodiment, the intake pipe 4 is made of polyurethane. Polyurethane, with the full name of polycarbamate, is abbreviated as PU. The polyurethane material has a certain flexibility and plasticity, and can well adapt to the relative position between the inflation port on the top cover 2 of the battery cell to be tested and the inflator, facilitating layout.
[0042] Moreover, with a sharp tool or cutting tool, the intake pipe 4 made of polyurethane can be cut. When a test is completed, the intake pipe 4 located outside the battery cell to be tested is cut off, which not only realizes the separation of the battery cell to be tested from the inflator's charging pipe 3, but also realizes the recycling of the intake pipe 4. In the next test, the cut-off intake pipe 4 can be reused, reducing material waste and test costs.
[0043] In the embodiment of the present utility model, the outer diameter of the intake pipe 4 is smaller than the outer diameter of the charging pipe 3. Correspondingly, the diameter of the inflation port opened on the top cover 2 of the battery cell to be tested is smaller than the outer diameter of the charging pipe 3 of the inflator.
[0044] With such a setting, the diameter of the inflation port that needs to be opened on the top cover 2 of the battery cell to be tested is reduced, the difficulty of opening the inflation port is reduced, and it is easier to bond and seal the intake pipe 4 to the side wall of the inflation port, reducing the amount of adhesive used for bonding and sealing. The reduction in the diameter of the intake pipe 4 reduces the cost of the intake pipe 4 and makes it more convenient to cut.
[0045] Moreover, after the diameter of the inflation port is reduced, the influence of the deformation of the top cover 2 of the battery cell to be tested on the bonding position between the intake pipe 4 and the side wall of the inflation port is reduced, improving the reliability of the bonding position between the intake pipe 4 and the side wall of the inflation port, and ensuring the smooth progress of the pull - burst test.
[0046] For the convenience of description, the width direction of the battery cell to be tested refers to Figure 1 the direction indicated by y in Figure 1 , and the length direction of the battery cell to be tested refers to Figure 1 the direction indicated by x in
[0047] The outer diameter of the charging pipe 3 of the inflator is about 10 millimeters. In this embodiment, the outer diameter of the intake pipe 4 is set to 5 - 7 millimeters. While ensuring the inflation efficiency, it can reduce costs and facilitate cutting.
[0048] Specifically, the outer diameter of the intake pipe 4 can be set to 6 millimeters.
[0049] In this embodiment, the pull - explosion test device for the battery cell further includes an adapter 5. The adapter 5 has a first interface and a second interface. The first interface is connected to the inflation pipe 3, and the second interface is detachably connected to the intake pipe 4.
[0050] With such a setting, the intake pipe 4 is connected to the inflation pipe 3 of the inflator through the adapter 5, which is convenient for connection and disassembly and is beneficial to improving the test efficiency.
[0051] The second interface can be snap - connected or thread - connected to the intake pipe 4, which is more convenient for operation.
[0052] In the embodiment of the present utility model, the fixture 1 includes side plates and a bottom plate.
[0053] The side plates correspond to the side walls of the battery cell to be tested. The number of side plates is the same as the number of side walls of the battery cell to be tested. Each side plate is connected to form a cylindrical structure, and the cross - sectional shape of the cylindrical structure is adapted to the battery cell to be tested.
[0054] The bottom plate is arranged at one end of the cylindrical structure, and each side plate is fixedly connected to the bottom plate.
[0055] In this embodiment, among each side plate and the bottom plate, any two adjacent ones are connected together by bolts.
[0056] When using the pull - explosion test device for the battery cell provided by the embodiment of the present utility model to test the battery cell to be tested, an inflation port needs to be opened on the top cover 2 of the battery cell to be tested. Insert the intake pipe 4 into the inflation port, and use a resin - based adhesive to bond and seal the side wall of the intake pipe 4 and the inflation port. At the same time, a resin - based adhesive needs to be coated on the surface of the explosion - proof valve 6 to increase the strength of the explosion - proof valve 6 and avoid the problem that the explosion - proof valve 6 explodes in advance before the battery cell to be tested is inflated to the target pressure. Then, use the adapter 5 to connect the intake pipe 4 to the inflation pipe 3 of the inflator, place the battery cell to be tested in the fixture 1, and immerse them together. Start the inflator, and then the battery cell to be tested can be inflated and tested.
[0057] It should be noted that the inflation port needs to deviate from the middle position in the horizontal direction of the top cover 2 of the battery cell to be tested to avoid the area where the top cover 2 of the battery cell to be tested may bulge most severely, and to avoid the cracking of the adhesive at the inflation port position.
[0058] The connection between the inflator of the pull - explosion test device for the battery cell provided by the embodiment of the present utility model and the battery cell to be tested is realized through the intake pipe 4 and adhesive encapsulation. The pull - explosion test device for the battery cell will not limit the top cover 2 of the battery cell to be tested, will not restrict the deformation of the top cover 2 of the battery cell to be tested, and can allow the top cover 2 of the battery cell to be tested to freely bulge and deform with a central bulge under the action of the force, which is closer to the actual use state when the battery cell to be tested is put into use, and can improve the accuracy of the test results.
[0059] The cost of the pull - explosion test device for the battery cell provided by this embodiment is low, the test process is simple, and the accuracy of the test result is high. In addition, although the intake pipe 4 is a consumable, through cutting, the limited reuse of the intake pipe 4 can be achieved, avoiding waste, reducing costs, and avoiding damage to the original intake pipe 3 of the inflator, thereby extending the service life of the inflator and the intake pipe 3.
[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A pull explosion test device for an electric core, characterized in that, Comprising: A fixture (1) for accommodating a battery cell to be tested, an opening being provided at one end of the fixture (1) corresponding to the top cover (2) of the battery cell to be tested, the shape and size of the opening being adapted to the top cover (2) of the battery cell to be tested; An inflator having an inflation pipe (3), the inflation pipe (3) being adapted to be hermetically connected to an inflation port provided in the top cover (2) of the battery cell to be tested.
2. The pull explosion test device for the battery cell according to claim 1, wherein, Further comprising: An intake pipe (4), a first end of the intake pipe (4) being detachably connected to the inflation pipe (3), a second end of the intake pipe (4) being adapted to be inserted into the inflation port and adhesively sealed to the side wall of the inflation port.
3. The pull explosion test device for the battery cell according to claim 2, wherein, The intake pipe (4) is made of polyurethane.
4. The pull explosion test device for an electric cell according to claim 2 or 3, characterized in that, The outer diameter of the intake pipe (4) is smaller than the outer diameter of the inflation pipe (3).
5. The pull explosion test device for an electric cell according to claim 2 or 3, characterized in that, Further comprising: An adapter (5) having a first interface and a second interface, the first interface being connected to the inflation pipe (3), the second interface being detachably connected to the intake pipe (4).
6. The pull-off test device for the battery cell according to claim 2 or 3, characterized in that, The outer diameter of the intake pipe (4) is 5 to 7 millimeters.
7. The pull explosion test device for the battery cell according to claim 2 or 3, characterized in that, The outer diameter of the intake pipe (4) is 6 millimeters.
8. The pulling explosion test device for the battery cell according to claim 5, wherein, The second interface is snap-connected to the intake pipe (4), or the second interface is threadedly connected to the intake pipe (4).
9. The pull explosion test device for the battery cell according to claim 1, characterized in that, The fixture (1) comprises: Side plates, the number of the side plates being the same as the number of the side walls of the battery cell to be tested, each of the side plates being connected to form a cylindrical structure, the cross-sectional shape of the cylindrical structure being adapted to the battery cell to be tested; A bottom plate provided at one end of the cylindrical structure, each of the side plates being fixedly connected to the bottom plate.
10. The pull explosion test device for the battery cell according to claim 9, wherein, Among each of the side plates and the bottom plate, any two adjacent ones are connected together by bolts.