Test fixture and battery pressing test system

Abstract

The utility model proposes a test fixture and a battery pressing test system, and relates to the technical field of test tools, the test fixture comprises a fixture frame and at least two groups of fixing mechanisms, the fixture frame is provided with a test hole site along a first direction in a penetrating manner, each fixing mechanism comprises a clamping assembly, a fixed driving assembly and a rotation driving assembly, the clamping assembly comprises a clamping piece and a rotating piece, and the clamping piece is located at the eccentric position of the rotating piece. The movable end of the fixed driving assembly moves close to or away from the center of the test hole site, and the movable end is connected with the rotating piece; the rotating end of the rotating driving assembly is connected with the rotating piece. The test fixture can solve the problems that an existing test fixture cannot detect whether the lithium battery shell in contact with the clamping plate has defects or not, so that the detection result is inaccurate, and the overall quality of the lithium battery shell is affected.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, and in particular to a testing fixture and a battery pressure testing system. Background Technology

[0002] A power lithium battery is a rechargeable battery that uses lithium ions as the positive electrode material. It is a high-performance, high-energy-density battery that is widely used in electric vehicles, drones, power tools and other fields that require a large amount of energy output. As the use of power lithium-ion batteries in automobiles increases and the technology becomes more mature, the requirements for battery production and processing are also higher. Typically, testing fixtures are used to fix the lithium battery cells in pressure testing equipment for pressure testing.

[0003] For example, patent CN211927189U discloses a pressure testing fixture for square lithium batteries. The fixture uses an inflation assembly to fix and seal the battery to be pressured, followed by a clamping assembly to clamp it. Finally, the battery is inflated in a water environment using the inflation assembly to observe whether air bubbles appear, thereby testing the battery's welding effect. However, this testing fixture requires a clamping plate from the clamping assembly to hold the square lithium battery casing. During the pressure test, the clamping plate is in close contact with the outer wall of the lithium battery casing, making it impossible to detect defects in the casing. This leads to inaccurate test results and affects the overall quality of the lithium battery casing. Utility Model Content

[0004] In view of this, the present invention proposes a test fixture and a battery pressure testing system, which can solve the problem that existing test fixtures cannot detect whether there are defects in the lithium battery casing that is in contact with the clamping plate, resulting in inaccurate test results and thus affecting the overall quality of the lithium battery casing.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a test fixture, including a fixture frame and a fixing mechanism. The fixture frame has a test hole extending through it along a first direction. The fixing mechanism includes:

[0007] A clamping assembly includes a clamping member and a rotating member, wherein the clamping member is located at an eccentric position of the rotating member;

[0008] A fixed drive assembly, wherein the movable end of the fixed drive assembly moves along a center approaching or away from the test hole position, and the movable end is connected to the rotating member; and

[0009] A rotation drive assembly, wherein the rotating end of the rotation drive assembly is connected to the rotating component.

[0010] Based on the above technical solutions, preferably, the fixed drive component includes:

[0011] A fixed driver is mounted on the fixture frame; and

[0012] A fixed connector is disposed at the movable end of the fixed driver and is movably connected to the rotating member in the rotation direction of the rotating member;

[0013] The test fixture further includes a first mating component, comprising a first connecting part and a first mating part that are mated together, wherein one of the first connecting part and the first mating part is disposed on the fixed connecting member, and the other is disposed on the rotating member.

[0014] More preferably, the first connecting portion and the first mating portion are fitted together in a moving direction perpendicular to the moving end of the fixed drive component.

[0015] Based on the above technical solutions, preferably, the fixed drive assembly is provided with at least two sets at intervals, the first end of the fixed connector is connected to the fixed driver, and the second end of the fixed connector is connected to the rotating component;

[0016] The second end of each of the fixed connecting members is at the same distance from the rotation center of the rotating member.

[0017] Based on the above technical solutions, preferably, the rotation drive assembly includes:

[0018] A rotary actuator, mounted on the fixture frame, has a rotating shaft connected to its rotating end; and

[0019] A rotating sleeve is fitted onto the rotating shaft and slides with the rotating shaft;

[0020] The test fixture further includes a second mating component, comprising a second connecting part and a second mating part that are mated together, wherein one of the second connecting part and the second mating part is disposed on the rotating shaft and the other is disposed on the rotating sleeve.

[0021] More preferably, the second connecting portion and the second mating portion are fitted together in the radial direction of the rotating shaft.

[0022] Based on the above technical solutions, preferably, it also includes at least two sets of limiting mechanisms, each of which is respectively disposed on both sides of the fixture frame in the first direction, and each limiting mechanism includes a movably disposed limiting member;

[0023] In a cross-section perpendicular to the first direction, the limiting member of the test fixture has a first state in which it is spaced apart from the test hole, and a second state in which it is at least partially located within the test hole.

[0024] More preferably, the limiting mechanism further includes a rotation limiting component, which is used to drive the limiting member to rotate.

[0025] Based on the above technical solutions, preferably, it also includes a controller disposed on the fixture frame, and both the fixed drive component and the rotation drive component are electrically connected to the controller.

[0026] This utility model also provides a battery pressure testing system, including the test fixture described above. The battery is assembled in the test hole of the test fixture. The fixture frame of the test fixture has a pressure groove communicating with the test hole. The fixture frame is also provided with at least one lifting ring.

[0027] The test fixture and battery pressure testing system of this utility model have the following advantages over the prior art:

[0028] (1) The battery is clamped by moving the clamping component through a fixed drive assembly to test the battery. The rotating component drives the rotating component to rotate synchronously, and the clamping component is located at the eccentric position of the rotating component. After the clamping component rotates a certain angle, the clamping component clamps and fixes the battery, and the battery is tested again. The contact area between the clamping component and the battery casing changes as the position changes, thereby achieving complete inspection of the battery casing. This solves the problem that existing test fixtures cannot detect whether there are defects in the lithium battery casing at the contact area with the test fixture, resulting in inaccurate test results and affecting the overall quality of the lithium battery casing.

[0029] (2) At least part of the limiting member is located in the test hole position to achieve the function of limiting and blocking the battery on one side in the first direction; two sets of limiting mechanisms are provided, and the two sets of limiting mechanisms are located on both sides of the fixture frame in the first direction to limit the battery on both sides in the first direction, ensuring the stability of the battery, and facilitating the adjustment of the position of the clamping member when the battery is on the fixture frame. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a perspective view of the test fixture of this utility model;

[0032] Figure 2 This is a cross-sectional view of the test fixture of this utility model;

[0033] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0034] Figure 4 for Figure 2 Enlarged view of section B in the middle;

[0035] Figure 5 for Figure 2 Enlarged view of section C.

[0036] Figure label:

[0037] 1. Fixture frame; 11. Test hole positions;

[0038] 2. Fixed mechanism;

[0039] 21. Clamping assembly; 211. Clamping component; 212. Rotating component;

[0040] 22. Fixed drive assembly; 221. Fixed driver; 222. Fixed connector;

[0041] 23. Rotation drive assembly; 231. Rotation driver; 232. Rotation shaft; 233. Rotation sleeve;

[0042] 3. First mating component; 31. First connecting part; 32. First mating part;

[0043] 4. Second mating component; 41. Second connecting part; 42. Second mating part;

[0044] 5. Limiting mechanism; 51. Limiting component; 52. Limiting shaft; 53. Knob; 54. Elastic component;

[0045] 6. Controller; 7. Pressure testing groove; 8. Lifting ring; 9. Power supply components. Detailed Implementation

[0046] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0047] like Figures 1 to 5As shown, this utility model provides a test fixture, which includes a fixture frame 1 and a fixing mechanism 2. The fixture frame 1 has a test hole 11 extending through it along a first direction. The fixing mechanism 2 includes a clamping assembly 21, a fixing drive assembly 22, and a rotation drive assembly 23. The clamping assembly 21 includes a clamping member 211 and a rotating member 212, with the clamping member 211 located at an eccentric position of the rotating member 212. The movable end of the fixing drive assembly 22 moves towards or away from the center of the test hole 11, and the movable end is connected to the rotating member 212. The rotating end of the rotation drive assembly 23 is connected to the rotating member 212.

[0048] like Figure 1 As shown, the test hole 11 is used to place the component to be tested. In this embodiment, a battery is used as an example of the component to be tested. It can be seen that in some embodiments, the component to be tested can also be a valve, a pipeline system, a product casing, or a pressure vessel. The product casing includes waterproof mobile phone cases or diving equipment, and the pressure vessel includes gas tanks or reaction vessels. Of course, the cross-sectional shape of the test hole 11 perpendicular to the first direction can be circular, rectangular, elongated, or other polygonal shapes. To ensure the test effect, the cross-sectional shape of the test hole 11 matches the component to be tested.

[0049] like Figures 1 to 3 As shown, the fixing mechanism 2 is mounted on the fixture frame 1 and is used to fix and clamp the battery. During testing, the battery is placed in the test hole 11, and the clamping member 211 is moved by the fixing drive assembly 22 to fix and clamp the battery, thereby testing the battery. After the test is completed, the battery is kept stationary, and the clamping member 211 is moved away from the battery by the fixing drive assembly 22 to release the battery from the fixation. Then, the rotating member 212 is rotated by the rotation drive assembly 23, causing the clamping member 211 to rotate synchronously. After rotating a certain angle, the clamping member 211 is moved closer to the battery by the fixing drive assembly 22 to fix the battery, and the battery is tested again. Since the clamping member 211 is located at an eccentric position of the rotating member 212, the position of the battery held by the clamping member 211 on both sides is different after the rotating member 212 rotates a certain angle. This ensures that the battery casing can be completely detected, solving the problem that the part in contact with the test fixture cannot be tested during the test, resulting in inaccurate test results.

[0050] In some embodiments, the fixed drive assembly 22 includes a fixed driver 221 and a fixed connector 222, wherein the fixed driver 221 is disposed on the fixture frame 1; the fixed connector 222 is disposed at the movable end of the fixed driver 221 and is movably connected to the rotating member 212 in the rotation direction of the rotating member 212. The test fixture also includes a first mating component 3, including a first connecting portion 31 and a first mating portion 32 that are mated together, one of the first connecting portion 31 and the first mating portion 32 being disposed on the fixed connector 222, and the other being disposed on the rotating member 212.

[0051] like Figures 1 to 3 As shown, the fixed actuator 221 is used to drive the movement of the fixed connector 222. The fixed actuator 221 includes a cylinder, an electric push rod, or a structure that combines a motor and a lead screw. In this embodiment, the fixed actuator 221 uses an electric push rod, which is fixedly mounted on the clamp frame 1. The movable end of the electric push rod is connected to the fixed connector 222 to drive the reciprocating movement of the fixed connector 222. The fixed connector 222 is connected to the rotating member 212. The movement of the fixed connector 222 drives the synchronous movement of the rotating member 212, thereby enabling the clamping member 211 to move towards or away from the battery.

[0052] To ensure the stable rotation of the rotating component 212, the fixed connector 222 is slidably fitted with the rotating component 212 in the rotation direction of the rotating component 212, so as to prevent the fixed connector 222 from affecting the rotation of the rotating component 212. Specifically, an annular groove can be formed on the rotating component 212, and the second end of the fixed connector 222 is embedded in the annular groove, thereby ensuring the stable rotation of the rotating component 212.

[0053] To ensure the fixing effect of the fixing mechanism 2, at least two sets of fixing drive components 22 are provided at intervals. The first end of the fixing connector 222 is connected to the fixing driver 221, and the second end of the fixing connector 222 is connected to the rotating component 212. The second end of each fixing connector 222 is at the same distance from the rotation center of the rotating component 212, and the second end of each fixing connector 222 is embedded in the same annular groove of the rotating component 212, which facilitates manufacturing and assembly.

[0054] like Figures 1 to 4As shown, in some embodiments, the test fixture further includes a first mating component 3. The first mating component 3 includes a first connecting portion 31 and a first mating portion 32 that are mated together. One of the first connecting portion 31 and the first mating portion 32 is disposed at the second end of the fixed connecting member 222, and the other is disposed on the rotating member 212. The first connecting member and the first mating portion 32 are provided to ensure a stable connection between the rotating member 212 and the fixed connecting member 222, ensuring that they can slide together while also moving stably and synchronously.

[0055] Specifically, the first connecting part 31 and the first mating part 32 include an embedded mating or a detachable mating via screws or bolts. When the first connecting part 31 and the first mating part 32 are detachably mated via screws or bolts, when the fixed drive assembly 22 drives the rotating member 212 to move, the first connecting part 31 and the first mating part 32 are connected by screws or bolts. When the rotation drive assembly 23 drives the rotating member 212 to rotate, the screwed mating between the first connecting part 31 and the first mating part 32 is canceled.

[0056] In this embodiment, the first connecting part 31 and the first mating part 32 are embedded and mated as an example. One of the first connecting part 31 and the first mating part 32 is a first protrusion and the other is a first groove. For example, the first protrusion is formed on the circumferential direction of the fixed connecting member 222 and the first groove is formed on the rotating member 212. Of course, in order to ensure the stable rotation of the rotating member 212, the first groove is an annular groove. By embedding the first protrusion in the first groove, it is ensured that the movement of the fixed connecting member 222 will drive the rotating member 212 to move synchronously.

[0057] Optionally, the first connecting portion 31 and the first mating portion 32 are fitted together in a direction perpendicular to the moving end of the fixed drive assembly 22, thereby ensuring that the movement of the fixed connecting member 222 can stably drive the rotating frame to move synchronously. Of course, the first connecting portion 31 and the first mating portion 32 can also be fitted together in any direction that forms an angle with the rotation axis 232 of the rotating member 212.

[0058] In some embodiments, at least two sets of fixed drive components 22 are provided at intervals, and the second end of each fixed connector 222 is at the same distance from the rotation center of the rotating component 212; by driving the rotating component 212 to move through at least two sets of fixed drive components 22, the stability of the movement of the rotating component 212 is improved.

[0059] like Figures 1 to 5As shown, in some embodiments, the rotation drive assembly 23 includes a rotation driver 231 and a rotation sleeve 233. The rotation driver 231 is disposed on the fixture frame 1, and the rotating end of the rotation driver 231 is connected to a rotation shaft 232. The rotation sleeve 233 is sleeved on the rotation shaft 232 and slides in cooperation with the rotation shaft 232. The test fixture also includes a second mating component 4, which includes a second connecting part 41 and a second mating part 42 that are mated together. One of the second connecting part 41 and the second mating part 42 is disposed on the rotation shaft 232, and the other is disposed on the rotation sleeve 233.

[0060] The rotary actuator 231 drives the rotary shaft 232 to rotate. The rotary actuator 231 includes a motor, a rotary cylinder, etc. In this embodiment, the rotary actuator 231 uses a servo motor, which is fixedly mounted on the fixture frame 1. The rotary shaft 232 is coaxially fixed to the output shaft of the servo motor via a coupling. The rotation of the servo motor's output shaft drives the synchronous rotation of the rotary shaft 232. The rotary shaft 232 is connected to the rotary sleeve 233 via the second mating component 4. Therefore, the rotation of the rotary shaft 232 will drive the rotary sleeve 233 to rotate synchronously, thereby realizing the rotation of the rotating component 212 and adjusting the position of the clamping component 211 on the battery.

[0061] To ensure the stable movement of the rotating component 212, the rotating sleeve 233 and the rotating shaft 232 are slidably fitted in the moving direction of the fixed connector 222, preventing the rotating shaft 232 from affecting the movement of the rotating component 212. Specifically, a groove is formed on the rotating sleeve 233, and the rotating shaft 232 is slidably disposed in the groove, thereby ensuring the reliability of sliding.

[0062] like Figures 1 to 5 As shown, in some embodiments, the test fixture further includes a second mating component 4. The second mating component 4 includes a second connecting portion 41 and a second mating portion 42 that are mated together. One of the second connecting portion 41 and the second mating portion 42 is disposed on the rotating shaft 232, and the other is disposed on the rotating sleeve 233. The second connecting portion 41 and the second mating portion 42 are provided to ensure a stable connection between the rotating sleeve 233 and the rotating shaft 232, ensuring that they can slide together while rotating stably and synchronously.

[0063] Specifically, the second connecting part 41 and the second mating part 42 include an embedded mating or a detachable mating via screws or bolts. When the second connecting part 41 and the second mating part 42 are detachably mated via screws or bolts, the second connecting part 41 and the second mating part 42 are connected via screws or bolts when the rotation drive assembly 23 drives the rotating part 212. When the fixed drive assembly 22 drives the rotating part 212 to move, the screw connection between the second connecting part 41 and the second mating part 42 is canceled.

[0064] This embodiment describes the example of the second connecting part 41 and the second mating part 42 being fitted together. One of the second connecting part 41 and the second mating part 42 is a second protrusion, and the other two are first grooves. For example, the second protrusion is formed in the circumferential direction of the rotating shaft 232, and the second groove is formed on the rotating sleeve 233. Of course, in order to ensure the stable rotation of the rotating member 212, the second groove is an annular groove. By embedding the second protrusion in the second groove, the rotation of the rotating shaft 232 will drive the rotating sleeve 233 to rotate synchronously, thereby realizing the rotation of the rotating member 212. Moreover, the length of the second groove in the axial direction of the rotating shaft 232 is greater than the length of the second protrusion in the axial direction of the rotating shaft 232, thereby ensuring the stable movement of the rotating member 212 under the driving action of the fixed driving assembly 22.

[0065] Optionally, the second connecting portion 41 and the second mating portion 42 are fitted together in the radial direction of the rotating shaft 232, thereby ensuring that the rotation of the rotating shaft 232 can stably drive the rotating sleeve 233 to rotate synchronously. Of course, the second connecting portion 41 and the second mating portion 42 can also be fitted together in any direction that forms an angle with the line of rotation of the rotating member 212's rotating shaft 232.

[0066] To ensure the aesthetics of the device, in some embodiments, the fixture frame 1 is provided with an installation space, and the fixing mechanism 2 is disposed within the installation space. The clamping member 211 of the fixing mechanism 2 protrudes from the side wall of the test hole 11 and is located within the test hole 11 to clamp and fix the battery. Placing the fixing mechanism 2 within the installation space protects it and also improves the versatility of the device, allowing it to be used in special environments such as underwater testing. The fixture frame 1 protects the fixing mechanism 2 from water and other contaminants, effectively preventing water from affecting its use and ensuring the reliability of the device.

[0067] like Figures 1 to 2As shown, in some embodiments, the test fixture further includes at least two sets of limiting mechanisms 5, each of which is respectively disposed on both sides of the fixture frame 1 in the first direction. Each limiting mechanism 5 includes a movable limiting member 51. In a cross-section perpendicular to the first direction, the limiting member 51 has a first state spaced apart from the test hole 11, and a second state at least partially located within the test hole 11. In the first state, the limiting member 51 limits the battery located within the test hole 11, confining it within the test hole 11. In the second state, the limiting member 51 releases the restriction on the battery located within the test hole 11 in the first direction, ensuring that during battery testing, the setting of the limiting member 51 does not affect the detection of the battery casing corresponding to the limiting member 51, thus ensuring the reliability of the detection effect.

[0068] The switching of the limiting member 51 between the first state and the second state can be manually driven. That is, the limiting member 51 is rotatably mounted on the fixture frame 1, and the technician can manually move the limiting member 51 to switch between the first state and the second state.

[0069] Of course, the limiting mechanism 5 may also include a rotation limiting component, which is used to drive the limiting member 51 to rotate. The rotation limiting component includes a rotating cylinder, a motor, or a linkage mechanism, etc.

[0070] In some embodiments, the rotation limiting assembly includes a limiting shaft 52 rotatably disposed on the fixture frame 1, the axis of the limiting shaft 52 being parallel to the first direction, a limiting member 51 being fixedly connected to the limiting shaft 52, and a knob 53 being fixedly connected to the rotating shaft, so that the limiting member 51 can be switched between a first state and a second state by rotating the knob 53.

[0071] The limiting shaft 52 can also pass through the fixture frame 1 along the first direction. Both ends of the limiting shaft 52 are provided with limiting members 51. The rotation of the knob 53 drives the rotation of the limiting shaft 52, which in turn drives the two limiting members 51 located on the limiting shaft 52 to rotate synchronously. When the limiting members 51 rotate to the second state, the movement of the battery in the first direction can be restricted simultaneously by the two limiting members 51, thereby improving work efficiency and ensuring the limiting effect.

[0072] Of course, the rotation limiting assembly may also include an elastic element 54. The elastic element 54 is fixedly connected to the clamp frame 1 and the limiting shaft 52. The elastic element 54 is used to elastically reset the limiting shaft 52. After the limiting shaft 52 is driven to rotate by the knob 53, the knob 53 is released, and elastic reset is achieved under the action of the elastic reset force of the elastic element 54. The elastic element 54 can include any component that can achieve elastic reset, such as a spiral spring, wave spring, constant force spring, rubber or plastic elastic material, etc.

[0073] like Figures 1 to 2 As shown, in some embodiments, the test fixture further includes a controller 6 disposed on the fixture frame 1. The fixed drive component 22 and the rotation drive component 23 are both electrically connected to the controller 6, and the controller 6 drives the fixed drive component 22 and the rotation drive component 23 to work.

[0074] like Figures 1 to 3 As shown, in some embodiments, the fixture frame 1 is also provided with a power supply component 9, and the fixed driver 221, the rotary driver 231, and the controller 6 are all electrically connected to the power supply component 9, and power is provided through the power supply component 9.

[0075] Reference Figures 1 to 5 As shown above, this application provides a test fixture that clamps the battery by moving the clamping member 211 to test it. The rotation of the driving rotating member 212 causes the clamping member 211 to rotate synchronously. The clamping member 211 is located at an eccentric position on the rotating member 212. After the clamping member 211 rotates a certain angle, it is clamped again with the battery for testing. The contact area between the clamping member 211 and the battery casing changes, thus achieving complete inspection of the battery casing. This solves the problem that existing test fixtures cannot detect defects in the lithium battery casing in contact with the clamping plate, leading to inaccurate test results and affecting the overall quality of the lithium battery casing.

[0076] like Figures 1 to 5 As shown, this utility model also provides a battery pressure testing system, including the test fixture described in the above embodiment. The battery is assembled in the test hole 11 of the test fixture. The fixture frame 1 of the test fixture is provided with a pressure groove 7 communicating with the test hole 11. At least one lifting ring 8 is also provided on the fixture frame 1.

[0077] The pressure groove 7 is used to cooperate with the inflation tube, which is inserted into the battery casing through the pressure groove 7 to inflate the battery casing. In this application, the pressure groove 7 is located at the top center of the fixture frame 1.

[0078] The lifting ring 8 is used to connect the traction rope to move the clamp frame 1. In order to ensure the stability of the movement of the clamp frame 1, two or more lifting rings 8 can be set at intervals.

[0079] During testing, the square lithium battery casing is placed in the test hole 11 of the fixture frame 1. The controller 6 is pressed, and the controller 6 starts the fixed driver 221. The fixed driver 221 drives the rotating part 212 and the clamping part 211 to move into the test hole 11 through the fixed connector 222. The clamping part 211 will gradually approach and abut against the square lithium battery casing, fixing the square lithium battery casing in the fixture frame 1.

[0080] Insert the inflation tube into the square lithium battery casing along the pressure groove 7, fix the traction rope to the lifting ring 8, release the traction rope, and the traction rope will drive the clamp frame 1 to fall into the clean water through the lifting ring 8. The inflation tube will inflate the square lithium battery casing and observe whether bubbles appear in the water environment.

[0081] After the observation is completed, pull the traction rope to lift the clamp frame 1 and the square lithium battery casing out of the water. Turn the knob 53. The knob 53 drives the limiting member 51 to rotate to the second state through the limiting shaft 52. The rotating limiting member 51 will rotate to both sides of the square lithium battery casing in the first direction, blocking the square lithium battery casing. Press the controller 6 again. The controller 6 starts the fixed driver 221 and the rotating driver 231. The fixed driver 221 drives the rotating member 212 and the clamping member 211 to move out of the test hole position 11 through the fixed connector 222. The clamping member 211 no longer abuts against the square lithium battery casing. The rotating driver 231 controls the rotating shaft 232 to rotate. The rotating shaft 232 drives the rotating sleeve through the second mating part 4. The cylinder 233 and the rotating part 212 rotate. The rotating part 212 will drive the clamping part 211 to rotate, causing the position of the clamping part 211 to change. Then the fixed driver 221 is started again. The fixed driver 221 drives the rotating part 212 and the clamping part 211 to move into the test hole 11 again through the fixed connector 222. The clamping part 211 will gradually approach and abut against the square lithium battery shell, fixing the square lithium battery shell in the fixture frame 1. The contact part between the clamping part 211 and the square lithium battery shell changes due to the change in position. The knob 53 is released. The elastic part 54 controls the limiting shaft 52 to drive the limiting part 51 to rotate in the opposite direction, switching to the first state. The limiting part 51 that rotates in the opposite direction no longer blocks the square lithium battery shell.

[0082] Release the traction rope, which drives the clamp frame 1 into the clean water via the lifting ring 8. The air inflator re-inflates the square lithium battery casing and observes whether bubbles appear in the water environment.

[0083] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test fixture, characterized by, The test fixture comprises a fixture frame (1) and a fixing mechanism (2), the fixture frame (1) is provided with a test hole (11) penetrating through in a first direction, the fixing mechanism (2) comprises: a clamping assembly (21) comprising a clamping piece (211) and a rotating piece (212), the clamping piece (211) is located at an eccentric position of the rotating piece (212); a fixing driving assembly (22), a movable end of the fixing driving assembly (22) moves towards or away from the center of the test hole (11), and the movable end is connected with the rotating piece (212); and a rotating driving assembly (23), a rotating end of the rotating driving assembly (23) is connected with the rotating piece (212).

2. The test fixture of claim 1, wherein: The fixing driving assembly (22) comprises: a fixing driver (221) arranged on the fixture frame (1); and a fixing connecting piece (222) arranged on the movable end of the fixing driver (221) and movably connected with the rotating piece (212) in the rotating direction of the rotating piece (212); The test fixture further comprises a first matching component (3) comprising a first connecting part (31) and a first matching part (32) in matching connection, one of the first connecting part (31) and the first matching part (32) is arranged on the fixing connecting piece (222), and the other is arranged on the rotating piece (212).

3. The test fixture of claim 2, wherein: The first connecting part (31) and the first matching part (32) are embedded and matched in a direction perpendicular to the moving direction of the movable end of the fixing driving assembly (22).

4. The test fixture of claim 2, wherein: The fixing driving assembly (22) is arranged at intervals in at least two groups, a first end of the fixing connecting piece (222) is connected with the fixing driver (221), and a second end of the fixing connecting piece (222) is connected with the rotating piece (212); The second end of each fixing connecting piece (222) is the same distance from the rotating center of the rotating piece (212).

5. The test fixture of claim 2, wherein: The rotating driving assembly (23) comprises: a rotating driver (231) arranged on the fixture frame (1), a rotating shaft (232) is connected with a rotating end of the rotating driver (231); and a rotating sleeve (233) sleeved on the rotating shaft (232) and in sliding fit with the rotating shaft (232); The test fixture further comprises a second matching component (4) comprising a second connecting part (41) and a second matching part (42) in matching connection, one of the second connecting part (41) and the second matching part (42) is arranged on the rotating shaft (232), and the other is arranged on the rotating sleeve (233).

6. The test fixture of claim 5, wherein: The second connecting part (41) and the second matching part (42) are embedded and matched in the radial direction of the rotating shaft (232).

7. The test fixture of claim 1, wherein, Further comprising at least two groups of limiting mechanisms (5), each limiting mechanism (5) is arranged on both sides of the fixture frame (1) in the first direction, and the limiting mechanism (5) comprises a limiting piece (51) movably arranged. The test fixture has a first state in which the limiting member (51) is spaced apart from the test hole (11) and a second state in which the limiting member (51) is at least partially located in the test hole (11).

8. The test fixture of claim 7, wherein: The limiting mechanism (5) further comprises a rotating limiting assembly for driving the limiting member (51) to rotate.

9. The test fixture of claim 1, wherein: A controller (6) is further arranged on the fixture frame (1), and the fixed driving assembly (22) and the rotating driving assembly (23) are electrically connected to the controller (6).

10. A battery crush testing system, comprising: The test fixture comprises the test fixture according to any one of claims 1 to 9, the battery is arranged in the test hole (11) of the test fixture, a pressing groove (7) is arranged on the fixture frame (1) of the test fixture and communicates with the test hole (11), and at least one lifting ring (8) is further arranged on the fixture frame (1).

Images