Lithium battery module welding tension testing device

Abstract

The utility model discloses a lithium battery module welding tension testing device which comprises a base, the top of the base is provided with a fixing assembly used for fixing a battery body, the center of the top of the base is fixedly provided with a mounting plate, the surface of one side of the mounting plate is fixedly connected with a shell through a limiting piece, and one side of the shell is provided with a mounting cylinder. A mounting cylinder is arranged in the shell, a tension meter is inserted into the mounting cylinder, a force measuring end of the tension meter is connected with a limiting ring through a connecting piece, the limiting ring is connected with a battery cover at the end part of the battery main body in a clamping manner, and a moving assembly for upwards moving the mounting cylinder is arranged in the shell. And when the battery needs to be replaced or other operations are carried out on the battery, the battery main body can be quickly taken out of or installed in the fixed cylinder, so that the working efficiency is improved, and the operation time and the labor cost are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery module testing devices, specifically relating to a lithium battery module welding tensile testing device. Background Technology

[0002] Batteries have positive and negative terminals. The tabs are metal conductors that lead the positive and negative terminals out of the battery cell. A single battery consists of multiple battery modules, and each battery module draws current in and out through the tabs. Therefore, the tabs of the battery modules need to be welded during the battery manufacturing process.

[0003] Chinese Patent CN218496610U discloses a lithium battery tensile tester including a drive unit, a tensile gauge, a cover clamp, and a battery fixture for fixing the battery body. The tensile gauge is mounted on the output end of the drive unit, and the cover clamp is mounted on the output end of the tensile gauge, positioned directly above the battery fixture. The drive unit drives the tensile gauge to move closer to or away from the battery fixture, and the cover clamp moves synchronously with the tensile gauge. The cover clamp includes two opposing clamping members with an adjustable spacing. Each clamping member has a free end for clamping the battery cover, and the free end of one of the clamping members has a receiving portion for accommodating the electrode tabs. This lithium battery tensile tester has the advantage of ensuring the accuracy of the test structure.

[0004] The lithium battery tensile tester mentioned above has some problems in actual use. The locking part of the cover clamp can be movably installed on the two clamping parts. Operating the locking part drives the two clamping parts to move closer or further apart. In actual testing, when the battery needs to be replaced frequently, it may increase the operation time and labor intensity and reduce the testing efficiency.

[0005] To address this, a welding tensile testing device for lithium battery modules is proposed. Utility Model Content

[0006] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a lithium battery module welding tensile testing device to solve the technical defects mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A welding tensile testing device for lithium battery modules includes a base, a fixing component for fixing the battery body is installed on the top of the base, a mounting plate is fixedly installed at the center of the top of the base, a housing is fixedly connected to one side surface of the mounting plate by a limiting member, a mounting cylinder is provided on one side of the housing, a tensile gauge is inserted into the inside of the mounting cylinder, the measuring end of the tensile gauge is connected to a limiting ring that snaps onto the battery cover at the end of the battery body by a connector, and a moving component for moving the mounting cylinder upward is provided inside the housing.

[0009] The fixing component includes a fixing cylinder fixedly installed on the top of the base and located at the center of the limiting ring. Rubber plates are fixedly installed on the top of both sides of the fixing cylinder. A protrusion is fixedly connected to the upper part of the opposite side of the two sets of rubber plates. The surface of the fixing cylinder is provided with a pushing component that simultaneously squeezes the protrusion inward to clamp the battery body.

[0010] The surface of the mounting cylinder is threaded with a first bolt, one end of which abuts against the surface of the tension gauge.

[0011] As a preferred embodiment of this utility model, the pushing component includes an external thread fixedly disposed on the surface of the fixed cylinder, and a hexagonal nut is threadedly connected to the surface of the fixed cylinder through the external thread. A connecting pipe is fixedly installed on the top of the hexagonal nut, and the opening of the connecting pipe at the top is rounded.

[0012] As a preferred embodiment of this utility model, the connector includes a threaded rod fixedly connected to the force measuring end of the tension gauge. One end of the threaded rod passes through the mounting cylinder, and a connecting block is threadedly connected to the surface of the threaded rod located below the mounting cylinder. One side of the connecting block is connected to one side of the limiting ring through a detachable connecting assembly.

[0013] As a further embodiment of this utility model, the detachable connecting assembly includes a connecting strip fixedly connected to one side surface of the limiting ring, and an insertion groove corresponding to the connecting strip is opened at the end of the connecting block. The connecting strip is inserted into the inner cavity of the insertion groove, and a second bolt is threadedly connected to the bottom of the connecting block. One end of the second bolt passes through the connecting strip and is threadedly connected to the top inner wall of the insertion groove.

[0014] As a preferred embodiment of this utility model, the limiting member includes a limiting plate fixedly connected to one side surface of the housing. The surface of the mounting plate is provided with a limiting hole for the limiting plate to slide up and down. A washer is provided at the end of the limiting plate. A screw is inserted into the inner cavity of the washer. One end of the screw passes through the washer and is threaded to the end of the limiting plate.

[0015] As a preferred embodiment of this utility model, the movable component includes a receiving groove opened inside the housing. A lead screw is rotatably connected to the inner cavity of the receiving groove. One end of the lead screw passes through the housing upward and is fixedly connected to a handwheel. A nut seat is threadedly connected to the surface of the lead screw. A strip-shaped hole communicating with the receiving groove is opened on one side surface of the housing. A connecting plate is slidably connected to the inner cavity of the strip-shaped hole. One end of the connecting plate is fixedly connected to the surface of the nut seat, and the other end of the connecting plate is fixedly connected to the surface of the mounting cylinder.

[0016] As a preferred embodiment of this utility model, a notch is provided on the front side of the limiting ring, and grooves for engaging the edge of the battery cover are provided on both sides of the top of the limiting ring.

[0017] Compared with existing technologies, the lithium battery module welding tensile testing device provided by this utility model has the following advantages:

[0018] 1. The battery body of this utility model is easy and quick to insert and remove. When it is necessary to replace the battery or perform other operations on the battery, the battery body can be quickly removed from the fixed cylinder or installed, which improves work efficiency and reduces operation time and labor costs.

[0019] 2. This utility model is equipped with a pushing component. By simply rotating the hexagonal nut, the clamping force of the protrusion on the rubber plate on the battery body can be adjusted, which improves the efficiency of the battery fixing process. At the same time, the top opening of the connecting tube is rounded, which can avoid scratches or other damage to the battery body caused by sharp edges during the adjustment of the clamping force, thus protecting the battery body.

[0020] 3. This utility model, through the setting of a detachable connecting component, makes the connection between the limiting ring and the connecting block both firm and flexible. When it is necessary to replace the limiting ring of different specifications to adapt to different battery covers, simply unscrew the second bolt, separate the connecting strip from the insertion slot, and replace the limiting ring, thus improving the versatility of the device. At the same time, the second bolt passes through the connecting strip and is threaded to the inner wall of the top of the insertion slot, effectively preventing the connecting strip from accidentally coming out of the insertion slot, ensuring that the connection between the limiting ring and the connecting block is stable and reliable during the tensile test, and ensuring the smooth progress of the test. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of the shell in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the mounting cylinder in an embodiment of this utility model.

[0026] Figure label:

[0027] 100. Base; 101. Mounting plate; 102. Tensile gauge; 103. Mounting cylinder; 104. First bolt; 105. Threaded rod; 106. Groove; 107. Notch; 108. Housing; 109. Limiting ring;

[0028] 200. Limiting hole; 201. Screw; 202. Washer; 203. Limiting plate;

[0029] 300. Lead screw; 301. Handwheel; 302. Receiving groove; 303. Strip hole; 304. Nut seat; 305. Connecting plate;

[0030] 400. Hexagonal nut; 401. Connecting pipe; 402. Rubber sheet; 403. Protrusion; 404. Fixing sleeve; 405. External thread;

[0031] 500, Connecting block; 501, Second bolt; 502, Insertion groove; 503, Connecting strip. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0034] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0035] See appendix Figure 1-4As shown in the figure, an embodiment of the present invention provides a welding tensile testing device for a lithium battery module, including a base 100. A fixing component for fixing the battery body is installed on the top of the base 100. An mounting plate 101 is fixedly installed at the center of the top of the base 100. A housing 108 is fixedly connected to one side surface of the mounting plate 101 through a limiting member. An mounting cylinder 103 is provided on one side of the housing 108. A tensile gauge 102 is inserted into the inside of the mounting cylinder 103. The measuring end of the tensile gauge 102 is connected to a limiting ring 109 that snaps onto the battery cover at the end of the battery body through a connector. A moving component for moving the mounting cylinder 103 upward is provided inside the housing 108.

[0036] The fixing component includes a fixing cylinder 404 fixedly installed on the top of the base 100 and located at the center of the limiting ring 109. Rubber plates 402 are fixedly installed on the top of both sides of the fixing cylinder 404. A protrusion 403 is fixedly connected to the upper part of the opposite side of the two sets of rubber plates 402. The surface of the fixing cylinder 404 is provided with a pushing component that simultaneously squeezes the protrusion 403 inward to clamp the battery body.

[0037] The surface of the mounting cylinder 103 is threaded with a first bolt 104. One end of the first bolt 104 abuts against the surface of the tension gauge 102. With the setting of the fixing component, the insertion and removal of the battery body is convenient and quick. When it is necessary to replace the battery or perform other operations on the battery, the battery body can be quickly removed from or installed in the fixing cylinder 404, which improves work efficiency and reduces operation time and labor costs.

[0038] The structure of the battery body is a well-known technical means in the art, and its specific structure will not be described.

[0039] The pushing component includes an external thread 405 fixedly disposed on the surface of the fixing cylinder 404. A hexagonal nut 400 is threadedly connected to the surface of the fixing cylinder 404 via the external thread 405. A connecting tube 401 is fixedly installed on the top of the hexagonal nut 400. The upper opening of the connecting tube 401 is rounded. By setting up the pushing component, the operator can adjust the clamping force of the protrusion 403 on the rubber plate 402 on the battery body simply by rotating the hexagonal nut 400, thereby improving the efficiency of the battery fixing process. At the same time, the rounded opening at the top of the connecting tube 401 can prevent scratches or other damage to the battery body caused by sharp edges during the adjustment of the clamping force, thus providing a certain degree of protection for the battery body.

[0040] The connector includes a threaded rod 105 fixedly connected to the force measuring end of the tension gauge 102. One end of the threaded rod 105 passes through the mounting cylinder 103. A connecting block 500 is threadedly connected to the surface of the threaded rod 105 located below the mounting cylinder 103. One side of the connecting block 500 is connected to one side of the limiting ring 109 through a detachable connecting assembly. The connector makes it easier to install and remove the tension gauge 102, the connecting block 500 and the limiting ring 109. When the tension gauge 102 malfunctions and needs to be replaced, or when the limiting ring 109 needs to be cleaned or maintained, the components can be quickly separated, reducing maintenance costs and difficulty.

[0041] The detachable connection assembly includes a connecting strip 503 fixedly connected to one side surface of the limiting ring 109. The end of the connecting block 500 has an insertion groove 502 corresponding to the connecting strip 503. The connecting strip 503 is inserted into the inner cavity of the insertion groove 502. A second bolt 501 is threadedly connected to the bottom of the connecting block 500. One end of the second bolt 501 passes through the connecting strip 503 and is threaded to the top inner wall of the insertion groove 502. Through the detachable connection assembly, the connection between the limiting ring 109 and the connecting block 500 is both secure and flexibly detachable. When it is necessary to replace the limit ring 109 of different specifications to adapt to different battery covers, simply unscrew the second bolt 501 to easily separate the connecting strip 503 from the insertion slot 502, replace the limit ring 109, and improve the versatility of the device. At the same time, the second bolt 501 passes through the connecting strip 503 and is threaded to the top inner wall of the insertion slot 502, which can effectively prevent the connecting strip 503 from accidentally coming out of the insertion slot 502, ensuring that the connection between the limit ring 109 and the connecting block 500 is stable and reliable during the tensile test, and ensuring the smooth progress of the test.

[0042] The limiting component includes a limiting plate 203 fixedly connected to one side surface of the housing 108. The surface of the mounting plate 101 has a limiting hole 200 for the limiting plate 203 to slide up and down. A washer 202 is provided at the end of the limiting plate 203. A screw 201 is inserted into the inner cavity of the washer 202. One end of the screw 201 passes through the washer 202 and is threaded to the end of the limiting plate 203. With the setting of the limiting component, the operator can accurately adjust the height position of the housing 108 according to actual needs, so that the tensile gauge 102 and the limiting ring 109 are in the optimal corresponding position with the battery cover, ensuring the accuracy and effectiveness of the tensile test. At the same time, the setting of the washer 202 and the screw 201 further enhances the stability of the connection between the limiting plate 203 and the mounting plate 101, preventing the position of the housing 108 from shifting due to vibration and other factors during the operation of the device.

[0043] The movable component includes a receiving groove 302 inside the housing 108. A lead screw 300 is rotatably connected to the inner cavity of the receiving groove 302. One end of the lead screw 300 passes through the housing 108 and is fixedly connected to a handwheel 301. A nut seat 304 is threadedly connected to the surface of the lead screw 300. A strip hole 303 communicating with the receiving groove 302 is opened on one side surface of the housing 108. A connecting plate 305 is slidably connected to the inner cavity of the strip hole 303. One end of the connecting plate 305 is fixedly connected to the surface of the nut seat 304, and the other end of the connecting plate 305 is fixedly connected to the surface of the mounting cylinder 103. By setting the movable component, the up and down movement of the mounting cylinder 103 can be precisely controlled, thereby accurately adjusting the magnitude and speed of the pulling force applied by the tension gauge 102 to the battery cover, which helps to obtain more accurate tension test data and meet the requirements of different test standards.

[0044] The limiting ring 109 has a notch 107 on its front side and grooves 106 on both sides of its top for engaging the edge of the battery cover. The notch 107 and the grooves 106 on the front and both sides of the top of the limiting ring 109 make it easy for operators to quickly and accurately engage the limiting ring 109 with the edge of the battery cover, improving the efficiency of preparation work before testing. At the same time, the cooperation between the grooves 106 and the edge of the battery cover can effectively prevent the limiting ring 109 from slipping off the battery cover during the tensile test, ensuring a stable connection between the battery cover and the limiting ring 109 during the test and guaranteeing the reliability of the test data.

[0045] In use, the battery body is removed, and the tabs of the battery body enter the inner cavity of the limiting ring 109 through the notch 107. The edge of the battery cover of the battery body is engaged with the inner cavity of the groove 106, and the battery body is inserted into the inner cavity of the fixing cylinder 404. When the battery body is inserted into the inner cavity of the fixing cylinder 404, the insertion of the battery body occupies a certain space, generating an outward squeezing force on the rubber plates 402 on both sides of the top of the fixing cylinder 404.

[0046] Turning the hex nut 400 upwards causes the connecting tube 401 to move upwards, which in turn generates an inward squeezing force on the protrusion 403 on the rubber plate 402. This causes the protrusion 403 on the opposite side of the two sets of rubber plates 402 to squeeze the battery body inwards, thus clamping and fixing the battery body.

[0047] Since the lead screw 300 and the nut seat 304 are threadedly connected, by rotating the lead screw 300, the nut seat 304 will move within the receiving groove 302. The movement of the nut seat 304 drives the connecting plate 305 connected to it. The other end of the connecting plate 305 is connected to the mounting cylinder 103, thus driving the mounting cylinder 103 to move up and down. Since the force measuring end of the tension gauge 102 is connected to the limiting ring 109 through the connecting piece, when the mounting cylinder 103 moves, it will drive the force measuring end of the tension gauge 102 to move, thereby applying a tension force to the battery cover through the limiting ring 109. At this time, the tension gauge 102 will measure the magnitude of the tension force applied to the battery cover, thereby assessing the firmness of the connection between the battery cover and the battery body.

[0048] When testing battery bodies of different heights, loosen screw 201 and slide housing 108 up and down, causing limiting plate 203 on one side of housing 108 to move up and down along limiting hole 200, thereby adjusting limiting ring 109 to the appropriate height.

[0049] In summary, the lithium battery module welding tensile testing device of this utility model allows for convenient and quick insertion and removal of the battery body. When it is necessary to replace the battery or perform other operations on the battery, the battery body can be quickly removed from or installed in the fixing cylinder 404, improving work efficiency and reducing operation time and labor costs. By setting up the push component, the operator only needs to rotate the hexagonal nut 400 to adjust the clamping force of the protrusion 403 on the rubber plate 402 on the battery body, improving the efficiency of the battery fixing process. At the same time, the top opening of the connecting tube 401 is rounded, which can avoid scratches and other damage to the battery body caused by sharp edges during the adjustment of the clamping force, thus providing a certain degree of protection for the battery body.

[0050] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A lithium battery module weld pull test apparatus comprising a base (100) characterised in that: The top of the base (100) is provided with a fixing assembly for fixing the battery body, the top center of the base (100) is fixedly provided with a mounting plate (101), one side surface of the mounting plate (101) is fixedly connected with a shell (108) through a limiting piece, one side of the shell (108) is provided with a mounting cylinder (103), the inside of the mounting cylinder (103) is inserted with a tensile meter (102), the force measuring end of the tensile meter (102) is connected with a limiting ring (109) clamping the end battery cover of the battery body through a connecting piece, the inside of the shell (108) is provided with a moving assembly moving the mounting cylinder (103) upward; The fixing assembly comprises a fixing cylinder (404) fixedly installed on the top of the base (100) and located at the center of the limiting ring (109), rubber plates (402) are fixedly installed on the top of the two sides of the fixing cylinder (404), protrusions (403) are fixedly connected to the upper sides of the two groups of rubber plates (402) opposite to each other, and the surface of the fixing cylinder (404) is provided with a pushing assembly simultaneously extruding the protrusions (403) inward so as to clamp the battery body. The surface of the mounting cylinder (103) is threadedly connected with a first bolt (104), and one end of the first bolt (104) abuts against the surface of the tensile meter (102).

2. The lithium battery module welding tension test device according to claim 1, characterized in that: The pushing assembly comprises external threads (405) fixedly arranged on the surface of the fixing cylinder (404), the surface of the fixing cylinder (404) is threadedly connected with a hexagonal nut (400) through the external threads (405), the top of the hexagonal nut (400) is fixedly provided with a connecting pipe (401), and the upper opening of the connecting pipe (401) is provided in a rounded corner.

3. The lithium battery module welding tension test device of claim 1, wherein: The connecting piece comprises a threaded rod (105) fixedly connected to the force measuring end of the tensile meter (102), one end of the threaded rod (105) penetrates through the mounting cylinder (103), the surface of the threaded rod (105) located below the mounting cylinder (103) is threadedly connected with a connecting block (500), and one side of the connecting block (500) is connected to one side of the limiting ring (109) through a detachable connecting assembly.

4. The lithium battery module weld tension testing device of claim 3, wherein: The detachable connecting assembly comprises a connecting strip (503) fixedly connected to the surface of one side of the limiting ring (109), the end of the connecting block (500) is provided with a plug-in groove (502) corresponding to the connecting strip (503), the connecting strip (503) is plugged into the inner cavity of the plug-in groove (502), the bottom of the connecting block (500) is threadedly connected with a second bolt (501), one end of the second bolt (501) penetrates through the connecting strip (503) and is threadedly connected to the top inner wall of the plug-in groove (502).

5. The lithium battery module weld pull test device of claim 1, wherein: The limiting piece includes a limiting plate (203) fixedly connected to one side surface of the shell (108), the surface of the mounting plate (101) is provided with a limiting hole (200) for the up-down sliding of the limiting plate (203), the end of the limiting plate (203) is provided with a gasket (202), the inner cavity of the gasket (202) is inserted with a screw rod (201), one end of the screw rod (201) penetrates through the gasket (202) and is screw-connected to the end of the limiting plate (203).

6. The lithium battery module weld tension testing device of claim 1, wherein: The moving assembly includes an accommodating groove (302) opened in the inner part of the shell (108), the inner cavity of the accommodating groove (302) is rotationally connected with a lead screw (300), one end of the lead screw (300) penetrates through the shell (108) upwardly and is fixedly connected with a hand wheel (301), the surface of the lead screw (300) is screw-connected with a nut seat (304), one side surface of the shell (108) is provided with a strip-shaped hole (303) in communication with the accommodating groove (302), the inner cavity of the strip-shaped hole (303) is slidingly connected with a connecting plate (305), one end of the connecting plate (305) is fixedly connected to the surface of the nut seat (304), the other end of the connecting plate (305) is fixedly connected to the surface of the mounting cylinder (103).

7. The lithium battery module weld tension testing device of claim 1, wherein: The front side of the limiting ring (109) is provided with a notch (107), the top two side openings of the limiting ring (109) are provided with grooves (106) for clamping the edges of the battery cover.

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