Test fixture

Abstract

The utility model provides a test fixture. The test fixture comprises a first clamping part; the first clamping part and the second clamping part are oppositely arranged, and a clamping space is formed between the first clamping part and the second clamping part; the conductive assembly is arranged on the side, facing the second clamping part, of the first clamping part; and the extrusion assembly is arranged on the second clamping part corresponding to the conductive assembly, and at least one part of the extrusion assembly can move in the direction close to or away from the conductive assembly relative to the second clamping part. According to the utility model, the problem of poor use performance of the battery test fixture in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery testing equipment, and more specifically, to a testing fixture. Background Technology

[0002] As the power source for new energy vehicles, power batteries are widely used. During the development stage of power batteries, their electrical performance needs to be characterized through various types of electrical performance tests. In electrical performance testing, test fixtures are indispensable auxiliary tools. On the one hand, they can apply a certain pressure to the battery to simulate the actual stress state of the battery in the module, thereby obtaining more objective and accurate test data. On the other hand, they can restrain the battery to avoid or reduce the harm to personnel and equipment caused by battery failure.

[0003] Lithium plating boundary testing is an indispensable part of many electrical performance tests. Its purpose is to obtain the lithium plating boundary during battery charging, and to formulate charging strategies within this range to reduce the risk of lithium plating during battery charging. In battery lithium plating boundary testing, a three-electrode battery is used as the test sample. Compared with a regular battery, a three-electrode battery has an additional copper wire extending from the inside of the battery to the outside of the casing as a reference electrode. Using conventional test fixtures for lithium plating boundary testing has several drawbacks. First, the reference electrode of the three-electrode battery is a thin copper wire, which is easily pulled and disconnected when connected to the voltage acquisition harness of the charging / discharging equipment, causing test interruption. Second, the charging / discharging harness of the charging / discharging equipment is fixed to the connecting pieces welded to the positive and negative electrodes of the square-shell three-electrode battery by bolts. Because the charging / discharging harness is not flexible enough, the connecting pieces are easily pulled and desoldered, causing test interruption. Compared to prismatic three-electrode batteries, pouch three-electrode batteries have more fragile positive and negative tabs, which are prone to detachment, causing battery leakage and posing a high safety risk during testing. Thirdly, conventional test fixtures have poor versatility. Different test fixtures are required for batteries of different sizes or packaging methods (prismatic and pouch). A large number of test fixtures are costly to manufacture and require a lot of storage space.

[0004] Therefore, existing battery testing fixtures suffer from poor performance. Utility Model Content

[0005] The main purpose of this invention is to provide a test fixture to solve the problem of poor performance of existing battery test fixtures.

[0006] To achieve the above objectives, according to one aspect of the present invention, a test fixture is provided, comprising: a first clamping portion; a second clamping portion, wherein the first clamping portion and the second clamping portion are disposed opposite to each other and a clamping space is provided between the first clamping portion and the second clamping portion; a conductive component, wherein the conductive component is disposed on the side of the first clamping portion facing the second clamping portion; and a pressing component, wherein the pressing component is disposed on the second clamping portion corresponding to the conductive component, and at least a portion of the pressing component is capable of moving relative to the second clamping portion in a direction toward or away from the conductive component.

[0007] Furthermore, the conductive component is disposed on a set of oppositely disposed sides of the first clamping portion, and the extrusion component includes at least two extrusion portions, which are disposed on a set of oppositely disposed sides of the second clamping portion corresponding to the conductive component.

[0008] Furthermore, the extrusion part includes: at least one extrusion member, which is correspondingly disposed with the conductive component; at least one reset member, which is correspondingly disposed with at least one reset member for each extrusion member, one end of the reset member abutting against the reset member, and the other end of the reset member abutting against the second clamping part.

[0009] Furthermore, all the reset members located on the same side of the second clamping part are spaced apart along the extending direction of the side.

[0010] Furthermore, the extrusion section also includes: at least one movable rod, each extruder is provided with at least one movable rod, one end of the movable rod is connected to the extruder, and the other end of the movable rod passes through the second clamping section and extends out from the side of the second clamping section away from the extruder.

[0011] Furthermore, the reset component corresponds one-to-one with the moving rod and is sleeved on the moving rod.

[0012] Furthermore, the extrusion section also includes a sleeve, which is disposed on the side of the second clamping section away from the extruder, and a sleeve is provided on the moving rod corresponding to the sleeve, and the sleeve is sleeved on the moving rod through the sleeve.

[0013] Furthermore, the conductive component includes at least three conductive parts, with two conductive parts spaced apart on one side of the first clamping part and one conductive part on the other side.

[0014] Furthermore, the conductive part includes: a conductive element disposed on the first clamping part, and the pressing part disposed opposite to the conductive element; a charging / discharging harness and / or a voltage acquisition harness, which are electrically connected to the conductive element respectively.

[0015] Furthermore, the first clamping part is provided with a receiving groove corresponding to the conductive element, and at least a portion of the conductive element is disposed in the receiving groove.

[0016] Furthermore, the conductive part also includes a mounting rod, one end of which passes through the conductive member and is connected to the first clamping part, and the charging / discharging harness and / or voltage acquisition harness are respectively disposed on the mounting rod.

[0017] Furthermore, the test fixture also includes a fixing component, and the first clamping part and the second clamping part are detachably connected by the fixing component.

[0018] Applying the technical solution of this utility model, the test fixture in this application includes a first clamping part, a second clamping part, a conductive component, and a squeezing component. The first clamping part and the second clamping part are disposed opposite to each other, and there is a clamping space between the first clamping part and the second clamping part; the conductive component is disposed on the side of the first clamping part facing the second clamping part; the squeezing component is disposed on the second clamping part corresponding to the conductive component, and at least a portion of the squeezing component can move relative to the second clamping part in a direction close to or away from the conductive component.

[0019] When using the test fixture of this application, since the test fixture has a first clamping part and a second clamping part, and there is a clamping space between the first clamping part and the second clamping part, the battery under test can be placed in the clamping space and clamped by the first clamping part and the second clamping part. This allows the first clamping part and the second clamping part to not only protect the battery under test but also ensure the stability of the battery under test during the testing process. Simultaneously, since the test fixture also has a conductive component disposed on the first clamping part and a pressing component disposed on the second clamping part, the positive electrode connecting piece, negative electrode connecting piece, and reference electrode of the battery under test can be electrically connected to the conductive component, and the pressing component ensures the stability of the connection between the positive electrode connecting piece, negative electrode connecting piece, and reference electrode and the conductive component, and also protects the positive electrode connecting piece, negative electrode connecting piece, and reference electrode. Furthermore, by adjusting the distance between the first clamping part and the second clamping part, and the distance between the pressing component and the conductive component, the test fixture of this application can be adapted to different models and types of batteries under test. Therefore, the test fixture in this application effectively solves the problem of poor performance of existing battery test fixtures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of a test fixture according to a specific embodiment of this application is shown;

[0022] Figure 2 An exploded view of a portion of the structure of a test fixture according to a specific embodiment of this application is shown;

[0023] Figure 3 A schematic diagram showing the positional relationship between the conductive components of the battery clamp and the battery under test in this application is provided.

[0024] The above figures include the following reference numerals:

[0025] 10. First clamping part; 11. Receiving groove; 20. Second clamping part; 30. Conductive component; 31. Conductive part; 311. Conductive element; 312. Charge / discharge harness; 313. Voltage acquisition harness; 314. Mounting rod; 40. Extrusion assembly; 41. Extrusion part; 411. Extrusion element; 412. Reset element; 413. Moving rod; 414. Tube sleeve; 4141. Sleeve; 50. Fixing assembly; 60. Battery under test; 61. Positive electrode connecting piece; 62. Negative electrode connecting piece; 63. Reference electrode. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] To address the issue of poor performance in existing battery testing fixtures, this application provides a testing fixture.

[0030] like Figures 1 to 3 As shown, the test fixture in this application includes a first clamping part 10, a second clamping part 20, a conductive component 30, and a pressing component 40. The first clamping part 10 and the second clamping part 20 are disposed opposite to each other, and there is a clamping space between the first clamping part 10 and the second clamping part 20; the conductive component 30 is disposed on the side of the first clamping part 10 facing the second clamping part 20; the pressing component 40 is disposed on the second clamping part 20 corresponding to the conductive component 30, and at least a portion of the pressing component 40 is capable of moving relative to the second clamping part 20 in a direction close to or away from the conductive component 30.

[0031] When using the test fixture of this application, since the test fixture has a first clamping part 10 and a second clamping part 20, and there is a clamping space between the first clamping part 10 and the second clamping part 20, the battery under test 60 can be placed in the clamping space and clamped by the first clamping part 10 and the second clamping part 20. This allows the first clamping part 10 and the second clamping part 20 to not only protect the battery under test 60 but also ensure the stability of the battery under test 60 during the test. Simultaneously, since the test fixture also has a conductive component 30 disposed on the first clamping part 10 and a pressing component 40 disposed on the second clamping part 20, the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63 of the battery under test 60 can be electrically connected to the conductive component 30 respectively. The pressing component 40 ensures the stability of the connection between the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63 and the conductive component 30, and protects the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63. Meanwhile, by adjusting the distance between the first clamping part 10 and the second clamping part 20, as well as the distance between the extrusion component 40 and the conductive component 30, the test fixture in this application can be adapted to different models and types of batteries 60 to be tested. Therefore, the test fixture in this application effectively solves the problem of poor performance of battery test fixtures in the prior art.

[0032] Furthermore, in this application, the battery to be tested 60 can be a prismatic battery, a pouch battery, etc.

[0033] Optionally, the conductive component 30 is disposed on a set of oppositely arranged sides of the first clamping portion 10, and the extrusion component 40 includes at least two extrusion portions 41, which are disposed on a set of oppositely arranged sides of the second clamping portion 20 corresponding to the conductive component 30. That is, in this application, the conductive component 30 can be divided into multiple parts and disposed on a set of oppositely arranged sides of the first clamping portion 10, thereby ensuring that the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63 of the battery under test 60 can be more easily connected to different parts of the conductive component 30 respectively. At this time, the different parts of the conductive component 30 are disconnected from each other and have no electrical connection, thereby avoiding short circuits between the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63 of the battery under test 60.

[0034] Furthermore, in this application, since the battery under test 60 has a reference electrode 63 in addition to the positive electrode connecting piece 61 and the negative electrode connecting piece 62, during the testing process, the reference electrode 63 may be located on the same side of the first clamping part 10 as the positive electrode connecting piece 61 or the negative electrode connecting piece 62. In the embodiment described in this application, the reference electrode 63 and the positive electrode connecting piece 61 are located on the same side of the first clamping part 10. Therefore, for the two pressing parts 41, one pressing part 41 is used to position and protect the negative electrode connecting piece 62, while the other pressing part 41 simultaneously positions and protects both the positive electrode connecting piece 61 and the reference electrode 63.

[0035] Furthermore, it should be noted that in this application, both the first clamping portion 10 and the second clamping portion 20 are made of insulating material, or when the first clamping portion 10 and the second clamping portion 20 are made of conductive material, the surfaces of the first clamping portion 10 and the second clamping portion 20 need to be covered with an insulating layer. The portion of the pressing portion 41 corresponding to the conductive component 30 is also made of insulating material. Meanwhile, the conductive component 30 needs to be made of conductive material to ensure a stable electrical connection between the conductive component 30 and the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63.

[0036] In one specific embodiment of this application, the extrusion part 41 includes at least one extrusion member 411 and at least one reset member 412. The extrusion member 411 is correspondingly disposed with the conductive component 30. Each extrusion member 411 is respectively provided with at least one reset member 412. One end of the reset member 412 abuts against the second clamping part 20, and the other end of the reset member 412 abuts against the second clamping part 20. The principle of this design is to utilize the elastic properties of the reset member 412 to provide a stable rebound force for the extrusion member 411, ensuring that even if there is slight external disturbance during the test, the extrusion member 411 can maintain stable contact with the battery electrode. At the same time, it can also effectively avoid excessive extrusion of the battery electrode by the extrusion member 411, thereby protecting the battery electrode. From another perspective, this arrangement also allows the test fixture in this application to adapt to batteries 60 of different sizes and types.

[0037] Furthermore, the number of extrusion members 411 can be adaptively adjusted in this application to ensure that different extrusion members 411 contact different battery electrodes, thereby further preventing short circuits between battery electrodes. Therefore, in this application, for the two extrusion sections 41, one extrusion section 41 has one extrusion member 411, while the other extrusion section 41 has two extrusion members 411, thus ensuring that the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63 can each correspond to a different extrusion member 411. Simultaneously, the number of reset members 412 corresponding to the extrusion members 411 can be adaptively adjusted according to actual usage requirements.

[0038] Optionally, the reset element 412 in this application may be a reset spring.

[0039] Optionally, all the reset members 412 located on the same side of the second clamping part 20 are spaced apart along the extending direction of the side. This arrangement effectively avoids interference between different reset members 412, and also ensures that the overall structure of the test fixture is more compact and occupies less space. Furthermore, this arrangement ensures that the force on the pressing member 411 is more uniform, thereby further protecting the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode 63 of the battery.

[0040] Optionally, the extrusion section 41 further includes at least one movable rod 413. Each extrusion member 411 is correspondingly provided with at least one movable rod 413. One end of the movable rod 413 is connected to the extrusion member 411, and the other end of the movable rod 413 passes through the second clamping part 20 and extends out from the side of the second clamping part 20 away from the extrusion member 411. In this application, when the extrusion member 411 moves relative to the conductive component 30 to adjust the space between the extrusion member 411 and the conductive component 30, the extrusion member 411 can drive the movable rod 413 to move together. By setting the movable rod 413, the movement direction of the extrusion member 411 can be effectively limited and guided, thereby effectively ensuring the stability of the test fixture.

[0041] Furthermore, the number of moving rods 413 corresponding to each extrusion part 411 can be adaptively adjusted according to actual usage requirements.

[0042] Optionally, the reset member 412 corresponds one-to-one with the moving rod 413 and is sleeved on the moving rod 413. This arrangement allows the moving rod 413 to limit the reset member 412, thereby ensuring a more stable force exerted by the reset member 412 on the pressing member 411 and preventing the direction of the force exerted by the reset member 412 on the pressing member 411 from being deviated.

[0043] Optionally, the extrusion part 41 further includes a sleeve 414, which is disposed on the side of the second clamping part 20 away from the extruder 411. The sleeve 414 has a corresponding sleeve 4141 on the moving rod 413, and the sleeve 414 is fitted onto the moving rod 413 through the sleeve 4141. In this application, the sleeve 414 can be fixedly disposed on the side of the second clamping part 20 away from the first clamping part 10 by screws or other structures. Furthermore, in this application, the same sleeve 414 can have multiple sleeves 4141, so that different sleeves 4141 correspond one-to-one with different moving rods 413. Of course, in this application, it can also be seen that the moving rod 413 sequentially passes through the second clamping part 20 and the sleeve 4141 portion of the sleeve 414.

[0044] Furthermore, in this application, the first clamping part 10, the second clamping part 20, and the extrusion member 411 can all be plate-shaped structures.

[0045] In one specific embodiment of this application, the conductive component 30 includes at least three conductive portions 31. Two conductive portions 31 are spaced apart on one side of the first clamping portion 10, and one conductive portion 31 is provided on the other side. By providing at least three conductive portions 31, it can be ensured that the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode of the battery under test 60 can be electrically connected to different conductive portions 31 respectively, thereby avoiding short circuits between the positive electrode connecting piece 61, the negative electrode connecting piece 62, and the reference electrode.

[0046] Specifically, the conductive part 31 includes a conductive element 311, a charging / discharging harness 312, and a voltage acquisition harness 313. The conductive element 311 is disposed on the first clamping part 10, and the pressing part 41 is disposed opposite to the conductive element 311; the charging / discharging harness 312 and the voltage acquisition harness 313 are electrically connected to the conductive element 311, respectively. Through the electrical connection between the conductive element 311 and the charging / discharging harness 312 and the voltage acquisition harness 313, the charging / discharging of the battery and the acquisition of voltage data can be realized. At the same time, the setting of the pressing part 41 can ensure stable contact between the conductive element 311 and the battery electrodes. Of course, in this application, the conductive part 31 may only have one of the charging / discharging harness 312 and the voltage acquisition harness 313, or it may have both the charging / discharging harness 312 and the voltage acquisition harness 313.

[0047] Preferably, the first clamping part 10 is provided with a receiving groove 11 corresponding to the conductive member 311, and at least a portion of the conductive member 311 is disposed in the receiving groove 11. This arrangement can effectively prevent the conductive member 311 from protruding too much from the surface of the first clamping part 10 after it is installed on the first clamping part 10, thereby preventing the positive electrode connecting piece 61, the negative electrode connecting piece 62 and the reference electrode of the battery under test 60 from bending, and thus protecting the positive electrode connecting piece 61, the negative electrode connecting piece 62 and the reference electrode.

[0048] Optionally, the conductive part 31 further includes a mounting rod 314, one end of which passes through the conductive member 311 and connects to the first clamping part 10. The charging / discharging harness 312 and the voltage acquisition harness 313 are respectively disposed on the mounting rod 314. This arrangement effectively reduces the difficulty of connecting the charging / discharging harness 312 and the voltage acquisition harness 313 to the conductive member 311. Furthermore, in this application, the mounting rod 314 can be threaded into the conductive member 311 and the first clamping part 10. Therefore, in this application, the mounting rod 314 enables a stable connection between the conductive member 311 and the charging / discharging harness 312 and the voltage acquisition harness 313, while also ensuring stable contact between the conductive member 311 and the battery electrodes. The implementation effect is improved testing efficiency and data accuracy.

[0049] Optionally, the test fixture further includes a fixing component 50, and the first clamping part 10 and the second clamping part 20 are detachably connected by the fixing component 50. In this application, the fixing component 50 may include multiple bolts, screws, or other structures, and the periphery of the first clamping part 10 and the second clamping part 20 may have multiple fixing holes that mate with the fixing component 50.

[0050] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0051] 1. The test fixture design of this application, by introducing conductive component 30 and extrusion component 40, can not only effectively prevent the reference electrode 63, connecting piece or tab of the battery from being damaged by the wire harness during the test, thus ensuring the stability and safety of the test, but also has a simple structure, is easy to install, and is suitable for batteries of various sizes and packaging methods, which greatly reduces the additional development cost of the test fixture and saves the storage space required for the test device.

[0052] 2. The versatile design of this test fixture makes it suitable not only for lithium plating boundary testing, but also for battery electrical performance testing such as capacity energy, power, and SOC-OCV, further improving testing efficiency and resource utilization, and reducing testing costs.

[0053] 3. By adopting the test fixture of this application, the sample damage rate during the test process is significantly reduced, and the risk of test interruption is effectively controlled, thereby improving the accuracy of test data and the continuity of the test process, which plays an important role in promoting battery performance evaluation and further research and development of battery technology.

[0054] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0055] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test fixture, characterized in that, include: First clamping part (10); The second clamping part (20) is provided opposite to the first clamping part (10) and the second clamping part (20), and there is a clamping space between the first clamping part (10) and the second clamping part (20); A conductive component (30) is disposed on the side of the first clamping part (10) facing the second clamping part (20); A squeezing assembly (40) is disposed on the second clamping part (20) corresponding to the conductive assembly (30), and at least a portion of the squeezing assembly (40) is capable of moving relative to the second clamping part (20) in a direction close to or away from the conductive assembly (30).

2. The test fixture according to claim 1, characterized in that, The conductive component (30) is disposed on a set of oppositely disposed sides of the first clamping part (10), and the extrusion component (40) includes at least two extrusion parts (41), which are disposed on a set of oppositely disposed sides of the second clamping part (20) corresponding to the conductive component (30).

3. The test fixture according to claim 2, characterized in that, The extrusion section (41) includes: At least one extrusion member (411) is provided corresponding to the conductive component (30); At least one reset member (412) is provided for each of the pressing members (411). One end of the reset member (412) abuts against the reset member (412), and the other end of the reset member (412) abuts against the second clamping part (20).

4. The test fixture according to claim 3, characterized in that, All the reset members (412) located on the same side of the second clamping part (20) are spaced apart along the extending direction of the side.

5. The test fixture according to claim 3, characterized in that, The extrusion section (41) further includes: At least one movable rod (413) is provided for each of the extrusion members (411). One end of the movable rod (413) is connected to the extrusion member (411), and the other end of the movable rod (413) passes through the second clamping part (20) and extends out from the side of the second clamping part (20) away from the extrusion member (411).

6. The test fixture according to claim 5, characterized in that, The reset component (412) corresponds one-to-one with the moving rod (413) and is sleeved on the moving rod (413).

7. The test fixture according to claim 5, characterized in that, The extrusion section (41) further includes: A sleeve (414) is provided on the side of the second clamping part (20) away from the extruder (411), and a sleeve (4141) is provided on the moving rod (413) corresponding to the sleeve (413). The sleeve (414) is sleeved on the moving rod (413) through the sleeve (4141).

8. The test fixture according to any one of claims 2 to 7, characterized in that, The conductive component (30) includes at least three conductive parts (31), with two of the conductive parts (31) spaced apart on one side of the first clamping part (10) and one conductive part (31) on the other side.

9. The test fixture according to claim 8, characterized in that, The conductive part (31) includes: A conductive element (311) is disposed on the first clamping part (10), and the pressing part (41) is disposed opposite to the conductive element (311); The charging / discharging harness (312) and / or the voltage acquisition harness (313) are respectively electrically connected to the conductive element (311).

10. The test fixture according to claim 9, characterized in that, The first clamping part (10) is provided with a receiving groove (11) corresponding to the conductive member (311), and at least a portion of the conductive member (311) is disposed in the receiving groove (11).

11. The test fixture according to claim 9, characterized in that, The conductive part (31) further includes a mounting rod (314), one end of which passes through the conductive member (311) and is connected to the first clamping part (10), and the charging and discharging harness (312) and / or the voltage acquisition harness (313) are respectively disposed on the mounting rod (314).

12. The test fixture according to any one of claims 2 to 7, characterized in that, The test fixture also includes a fixing component (50), through which the first clamping part (10) and the second clamping part (20) are detachably connected.

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