Test fixture and test device

Abstract

The utility model discloses a test fixture and a test device. The test fixture comprises a base, a first clamping piece and a second clamping piece. The first clamping piece and the second clamping piece are arranged on the base in a spaced mode, at least one of the first clamping piece and the second clamping piece is adjustably connected to the base in the first direction, and the surfaces, facing each other, of the first clamping piece and the second clamping piece are used for abutting against the outer surface of a tested object; the first direction is the arrangement direction of the first clamping piece and the second clamping piece. Grooves are formed in the opposite surfaces of the first clamping piece and the second clamping piece, the orthographic projection of the grooves on the target plane is a first projection, the test object is provided with a welding seam, the orthographic projection of the welding seam on the target plane is a second projection, and the second projection falls in the first projection; the target plane is perpendicular to the first direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a test fixture and a test device. BACKGROUND

[0002] The cell vibration test is to test whether the cell can withstand the vibration environment in the use process in the life cycle by simulating a series of vibration phenomena. When the vibration test is performed, the cell usually needs to be fixed by a fixture to ensure the reliability of the vibration test result. However, when the cell is clamped by the fixture in the related art for vibration test, the shell of the cell is easy to be cracked by the collision of the fixture, which eventually leads to that the cell that should have passed the test is determined as not passing the test due to the shell cracking, thereby interfering with the accuracy of the cell vibration test. CONTENT OF THE UTILITY MODEL

[0003] The test fixture and the test device provided by the embodiments of the present application solve the problem that the shell of the cell is easy to be cracked in the vibration test in the related art.

[0004] The test fixture provided by the embodiments of the present application comprises:

[0005] a base; and

[0006] first and second clamping members, which are arranged at intervals on the base, at least one of the first and second clamping members being adjustably connected to the base in a first direction, and the mutually facing surfaces of the first and second clamping members being used to abut against the outer surface of a test object; the first direction being the arrangement direction of the first and second clamping members.

[0007] The mutually facing surfaces of the first and second clamping members are provided with grooves, the orthographic projection of the grooves on a target plane is a first projection, the test object has a weld, the orthographic projection of the weld on the target plane is a second projection, and the second projection falls within the first projection; and the target plane is perpendicular to the first direction.

[0008] In the fixture provided by the embodiments of the present application, at least one of the two clamping members is adjustably connected to the base in the first direction, so that the distance between the two clamping members is adjustable, and the mutually facing surfaces of the two clamping members can tightly abut against the outer surface of the shell of the test object, thereby avoiding the test object from moving between the two clamping members during the vibration test. In addition, the mutually facing surfaces of the two clamping members are provided with grooves, and the second projection falls within the first projection, so that when the two clamping members clamp the test object, the position of the weld of the shell of the test object is directly opposite the grooves of the clamping members, without being directly contacted with the clamping members, thereby avoiding the problem that the weld of the test object is cracked due to the collision of the clamping members, and ensuring the smooth progress of the vibration test.

[0009] According to some embodiments of the present application, the groove is a ring structure, and the part of each of the first clamping member and the second clamping member surrounded by the groove is a boss, and the mutually facing surfaces of the boss of the first clamping member and the boss of the second clamping member are used to abut against the outer surface of the test object.

[0010] According to some embodiments of the present application, the edge of the mutually facing surfaces of the boss of the first clamping member and the boss of the second clamping member is provided with a chamfer.

[0011] In the embodiments of the present application, the edge of the boss is provided with a chamfer, so that stress concentration at the contact position of the test object and the boss can be avoided, and thus deformation of the shell of the test object can be avoided.

[0012] According to some embodiments of the present application, at least one of the first clamping member and the second clamping member is detachably connected to the base through a first fastener;

[0013] The base has a first assembly hole penetrating therethrough, the first assembly hole is long strip-shaped, and the length direction thereof is parallel to the first direction, and the first fastener is arranged in the first assembly hole to fasten and connect at least one of the first clamping member and the second clamping member to the base.

[0014] In the embodiments of the present application, since the base is provided with the first assembly hole penetrating therethrough, and the length direction of the first assembly hole is parallel to the first direction, the first fastener can be slightly moved in the length direction of the first assembly hole, and thus the distance between the two clamping members is adjusted. When adjusting, the first fastener only needs to be loosened, and does not need to be detached, so that the adjusting operation is simplified, and the adjusting efficiency is improved. In addition, the first fastener cooperates with the first assembly hole to realize "stepless adjustment", so that the distance between the two clamping members can be adjusted in a continuous range, and the adjusting precision is higher.

[0015] According to some embodiments of the present application, the clamp further comprises at least one pressing plate, the pressing plate is located on the side of the first clamping member and the second clamping member away from the base, and is detachably connected across the first clamping member and the second clamping member.

[0016] In the embodiments of the present application, at least one pressing plate is arranged on the side of the two clamping members away from the base, and the pressing plate can assist in limiting the test object, so that the test object can be prevented from being detached from between the two clamping members during vibration test.

[0017] According to some embodiments of the present application, the pressing plate has two connecting portions, each of which is detachably connected to the first clamping member and the second clamping member, and at least one of the two connecting portions is adjustably connected to at least one of the first clamping member and the second clamping member in the first direction.

[0018] In the embodiments of the present application, since at least one of the two connecting portions is adjustably connected to the corresponding clamping member in the first direction, when the distance between the two clamping members is adjusted, the pressing plate does not need to be detached from the clamping members, and the adjustment of the distance between the two clamping members is not affected, thereby avoiding the loss caused by detaching the pressing plate from the clamping members.

[0019] According to some embodiments of the present application, the at least one connecting portion is detachably connected to at least one of the first clamping member and the second clamping member by a second fastener.

[0020] The connecting portion has a second assembly hole penetrating therethrough, the second assembly hole is long strip-shaped, and the length direction thereof is parallel to the first direction, and the second fastener is arranged in the second assembly hole to fasten and connect the connecting portion and the corresponding clamping member.

[0021] In the embodiments of the present application, since the connecting portion is provided with the second assembly hole penetrating therethrough, and the length direction of the second assembly hole is parallel to the first direction, the second fastener can be slightly moved in the length direction of the second assembly hole, thereby realizing that when the distance between the two clamping members is adjusted, the position of the pressing plate and the clamping member can also be adjusted. When adjusting, only the second fastener needs to be loosened, and the second fastener does not need to be detached, thereby simplifying the adjustment operation and improving the adjustment efficiency. In addition, the second fastener cooperates with the second assembly hole, and the first fastener can be continuously moved along the length direction of the first assembly hole, thereby realizing "stepless adjustment", so that the relative position of the pressing plate and the clamping member can be adjusted in a continuous range, and the adjustment precision is higher.

[0022] According to some embodiments of the present application, the clamp further comprises two spacers arranged in the second direction, the spacers are detachably connected between the first clamping member and the second clamping member, and the mutually facing surfaces of the two spacers are used to abut against the outer surface of the test object.

[0023] The first projection is a ring structure, the normal projection of the spacer on the target plane is a third projection, and the third projection is located outside the outer circle of the first projection.

[0024] The second direction is perpendicular to the first direction.

[0025] In the embodiments of the present application, the two pads are arranged between the two clamping members, and the mutually facing surfaces of the two pads are used to abut against the outer surface of the test object, so that the test object can not move in the arrangement direction of the two pads during the vibration test.

[0026] According to some embodiments of the present application, at least one of the two pads is adjustably connected to the first clamping member and the second clamping member in the second direction.

[0027] In the embodiments of the present application, the distance between the two pads is adjustable, on the one hand, the clamp can adapt to test objects of different sizes, and on the other hand, the mutually facing surfaces of the two pads can abut against the outer surface of the test object tightly, so that the test object can not move in the second direction during the vibration test.

[0028] According to some embodiments of the present application, at least one of the two pads is adjustably connected to the first clamping member and the second clamping member in the second direction.

[0029] The corresponding parts of the first clamping member and the second clamping member in the first direction with the pads have a third assembly hole penetrating through, the third assembly hole is long strip-shaped, and the length direction thereof is parallel to the second direction, and the third fastener is arranged in the third assembly hole to fasten and connect the first clamping member and the second clamping member with the pads.

[0030] In the embodiments of the present application, since the clamping member is provided with a third assembly hole penetrating through, and the length direction of the third assembly hole is parallel to the second direction, the third fastener can move slightly in the length direction of the third assembly hole, thereby adjusting the relative position of the two clamping members and the pads. When adjusting, only the third fastener needs to be loosened, without being removed, which simplifies the adjusting operation and improves the adjusting efficiency. In addition, the third fastener cooperates with the third assembly hole to realize "stepless adjustment", so that the relative position of the two clamping members and the pads can be adjusted in a continuous range, and the adjusting precision is higher.

[0031] According to some embodiments of the present application, at least one of the mutually facing surfaces of the first clamping member and the second clamping member is provided with a first abutting member on one side, the first abutting member is detachably connected to the base, and abuts against the corresponding clamping member.

[0032] In the embodiments of the present application, by arranging the first abutting member on one side of the mutually facing surfaces of the two clamping members, the structural strength of the clamping member can be improved, and the deformation of the clamping member during long-term vibration can be avoided.

[0033] According to some embodiments of the present application, the first abutting member is adjustably connected to the base along the first direction.

[0034] In the embodiments of the present application, when the distance between the two clamping members is adjusted, the first abutting member can also move, without affecting the effect of the first abutting member on strengthening the strength of the clamping members, by arranging the first abutting member to be adjustably connected to the base along the first direction.

[0035] According to some embodiments of the present application, the first abutting member is detachably connected to the base by a fourth fastener.

[0036] The base has a fourth assembly hole penetrating therethrough, the fourth assembly hole is long strip-shaped, and the length direction of the fourth assembly hole is parallel to the first direction, and the fourth fastener is arranged in the fourth assembly hole to fasten and connect the first abutting member and the base.

[0037] In the embodiments of the present application, since the base is provided with the fourth assembly hole penetrating therethrough, and the length direction of the fourth assembly hole is parallel to the first direction, the fourth fastener can be slightly moved in the length direction of the fourth assembly hole, and thus the position of the first abutting member relative to the base can be adjusted. When adjusting, the fourth fastener only needs to be loosened, without being detached, which simplifies the adjusting operation and improves the adjusting efficiency. In addition, the fourth fastener cooperates with the fourth assembly hole to realize "stepless adjustment", so that the position of the first abutting member relative to the base can be adjusted in a continuous range, and the adjusting precision is higher.

[0038] According to some embodiments of the present application, the first abutting member is further provided with a second abutting member on both sides along a second direction, the second abutting member is fixedly connected to the corresponding clamping member, and abuts against one side surface of the base facing the first clamping member and the second clamping member.

[0039] The second direction is perpendicular to the first direction.

[0040] In the embodiments of the present application, the first abutting member is further provided with the second abutting member on both sides, and the second abutting member can play a role in assisting in strengthening the strength of the clamping members, and further avoiding deformation of the clamping members in a long-term vibration process.

[0041] According to some embodiments of the present application, the second abutting member is detachably connected to the first abutting member.

[0042] In the embodiments of the present application, the second abutting member is not only connected to the clamping member, but also connected to the first abutting member, which strengthens the structural strength of the whole of the clamping member, the first abutting member and the second abutting member, and avoids deformation in a long-term vibration process.

[0043] The test device of the embodiment of the present application comprises a vibration table and the test fixture of any one of the above, and the test fixture is arranged on the vibration table. BRIEF DESCRIPTION OF DRAWINGS

[0044] The drawings incorporated by reference in the specification and forming a part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. It is apparent that the drawings described below are only some embodiments of the present disclosure, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0045] Figure 1 It is a structural schematic diagram of an energy storage system.

[0046] Figure 2 It is a device for vibration test of an electric core.

[0047] Figure 3 It is an exploded structural schematic diagram of the electric core and the fixture.

[0048] Figure 4 It is an exploded structural schematic diagram of the fixture.

[0049] Figure 5 It is a three-dimensional schematic diagram of one of the clamping pieces.

[0050] Figure 6 It is a schematic diagram of the positional relationship of the first projection, the second projection and the third projection.

[0051] Figure 7 It is an exploded schematic diagram of the first fastener, the base and the clamping piece.

[0052] Figure 8 It is an exploded schematic diagram of the second fastener, the pressing plate and the clamping piece.

[0053] Figure 9 It is an exploded schematic diagram of the third fastener, the cushion block and the clamping piece.

[0054] Figure 10 It is an exploded schematic diagram of the fourth fastener, the first abutting piece and the clamping piece.

[0055] Among them, the reference signs are explained as follows:

[0056] 1, energy storage device; 2, electric energy conversion device; 3, user load;

[0057] 10, vibration table; 20, fixture; 30, electric core; 31, cylindrical side plate; 32, top plate; 33, bottom plate; 34, first weld; 35, second weld;

[0058] 100, base; 110, first assembly hole; 120, fourth assembly hole;

[0059] 200, clamping piece; 200a, first clamping piece; 200b, second clamping piece; 210, groove; 211, first slot segment; 212, second slot segment; 220, boss; 221, chamfer; 230, third assembly hole;

[0060] 300, pressing plate; 310, connecting portion; 310a, first connecting portion; 310b, second connecting portion; 311, second assembly hole;

[0061] 400, cushion block; 400a, first cushion block; 400b, second cushion block;

[0062] 500, first abutting piece; 600, second abutting piece;

[0063] 710, first fastener; 720, second fastener; 730, third fastener; 740, fourth fastener;

[0064] S1, first projection; S2, second projection; S3, third projection;

[0065] D1, first direction; D2, second direction; D3, third direction. DETAILED DESCRIPTION

[0066] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same or similar elements can be not be repeated.

[0067] It can be clearly understood that the terms "comprise" and "have" and any variations thereof in the present application are intended to cover the non-exclusive inclusion, for example, a process, method, system, product or device that includes a list of steps or units is not limited to the listed steps or units, but optionally further includes other steps or units not listed, or optionally further includes other steps or components inherent to the process, method, product or device.

[0068] Since the energy required by people has strong time and space, in order to reasonably use energy and improve the utilization rate of energy, it is necessary to store one form of energy into the same or another form of energy through a medium or device, and then release it in a specific energy form based on future application needs.

[0069] Current energy storage (i.e. energy storage) application scenarios are relatively wide, including power generation side energy storage, power grid side energy storage, renewable energy grid-connected energy storage, and user side energy storage, etc. The corresponding energy storage devices include:

[0070] (1) Large energy storage containers applied in power grid side energy storage scenarios, which can be used as high-quality active and reactive power regulation power sources in the power grid, realize load matching in time and space, enhance renewable energy consumption capacity, and are of great significance in power grid system backup, relieving peak load power supply pressure and peak regulation.

[0071] (2) Small and medium-sized energy storage cabinets applied in industrial and commercial energy storage scenarios (banks, shopping malls, etc.) on the user side and small household energy storage boxes applied in household energy storage scenarios on the user side, the main operation mode is "peak load shifting". Because there is a big price difference between the electricity price at the peak and the valley according to the electricity demand, after the user has energy storage equipment, in order to reduce the cost, the energy storage cabinet / box is usually charged during the low electricity price period; the electricity in the energy storage equipment is discharged for use during the high electricity price period, so as to achieve the purpose of saving electricity cost. In addition, in remote areas, as well as in areas where natural disasters such as earthquakes and hurricanes are prone to occur, the existence of household energy storage devices is equivalent to providing backup power for the user and the power grid, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0072] Taking the household energy storage scenario in the user side energy storage as an example, Figure 1 a household energy storage system is shown, which includes an energy storage device 1 and an electric energy conversion device 2 (such as a photovoltaic panel), and a user load 3 (such as street lamps, household appliances, etc.), the energy storage device 1 is a small energy storage box, which can be installed on the outdoor wall by wall hanging. Specifically, the electric energy conversion device 2 can convert solar energy into electric energy during the low electricity price period, and store it through the energy storage device 1, and then supply it to the user load 3 for use during the high electricity price period, or supply it to the user load 3 for use when the power grid is disconnected / power off.

[0073] And in combination with the above-mentioned energy storage by physical or electrochemical means, taking electrochemical energy storage as an example, the energy storage device 1 includes at least one group of chemical batteries, which use chemical elements in the chemical batteries as energy storage medium to realize the charging and discharging process through chemical reaction or change of the energy storage medium. Simply put, the electric energy generated by light energy and wind energy is stored in at least one group of chemical batteries through chemical reaction or change of the energy storage medium, and when the use of external electric energy reaches the peak, the electric quantity stored in the at least one group of chemical batteries is released for use through chemical reaction or change of the energy storage medium, or transferred to places where electric quantity is in short supply for use.

[0074] In this application, "test object" refers to an item that is clamped by a fixture for testing. For example, the test object can be a battery cell, a small battery box, or other items with welds. The following explanation will use a battery cell as an example.

[0075] As described in the background section, cell vibration testing is a series of tests conducted before cell transportation to simulate the vibration conditions that the cell may encounter during transportation, ensuring that the cell remains safe under vibration conditions. To ensure the reliability of the test, the cell usually needs to be fixed in place by a fixture.

[0076] The inventors of this application discovered in their research that the outer casing of a battery cell is usually connected by welding. The high temperature generated during the welding process can easily form a welding heat-affected zone on the outer casing of the battery cell. Because the strength of the welding heat-affected zone is relatively weak, the outer casing of the battery cell is prone to cracking after colliding with the fixture during vibration testing, which in turn leads to test failure.

[0077] like Figure 2 As shown in the figure, this application provides a testing device for performing vibration testing on battery cells. The device includes a vibration table 10 and a clamp 20, with the clamp 20 mounted on the vibration table 10. The clamp 20 holds the battery cell 30 ( Figure 3 The vibration table 10 can generate vibration, which in turn drives the clamp 20 and the battery cell 30 to vibrate together.

[0078] like Figures 2 to 4 As shown, the fixture 20 includes a base 100 and two clamping members 200. The base 100 is detachably connected to the vibration table 10, and the two clamping members 200 are located on the side of the base 100 facing away from the vibration table 10 and are detachably connected to the base 100.

[0079] In one embodiment, the base 100 can be bolted to the vibration table 10, but this is not a limitation.

[0080] It is understood that the number of clamping elements 200 can also be two or more, such as three, four, five or other numbers. Multiple clamping elements 200 can be arranged side by side along the thickness direction of the clamping elements 200.

[0081] This application does not impose any particular limitation on the shape of the base 100. For example, the base 100 can be flat, cubic, disc, etc. For ease of explanation, we take a rectangular flat base 100 as an example, and define the width direction of the base 100 as the first direction D1, the length direction of the base 100 as the second direction D2, and the thickness direction of the base 100 as the third direction D3. The first direction D1, the second direction D2, and the third direction D3 are all perpendicular to each other.

[0082] Two clamping members 200 are spaced apart on the base 100 along the first direction D1. At least one of the two clamping members 200 is adjustablely connected to the base 100 in the first direction D1. The surfaces of the two clamping members 200 that face each other are used to abut against the outer surface of the battery cell 30.

[0083] In one embodiment, the clamping member 200 is a flat plate structure and is arranged perpendicularly to the base 100. The length direction of the clamping member 200 is parallel to the second direction D2, the width direction is parallel to the third direction D3, and the thickness direction is parallel to the first direction D1.

[0084] like Figure 5 and Figure 6 As shown, the surfaces of the two clamping members 200 that face each other are provided with grooves 210. The orthographic projection of the grooves 210 on the target plane is the first projection S1. The weld seam of the outer shell of the battery cell 30 ( Figure 3 The orthographic projection of the first weld 34 and the second weld 35 on the target plane is the second projection S2, which falls within the first projection S1; the target plane is perpendicular to the first direction D1.

[0085] In this embodiment of the fixture 20, at least one of the two clamping members 200 is adjustablely connected to the base 100 in a first direction D1, making the distance between the two clamping members 200 adjustable. This allows the facing surfaces of the two clamping members 200 to firmly abut against the outer surface of the battery cell 30's casing, preventing the battery cell 30 from shifting between the two clamping members 200 during vibration testing. Furthermore, the facing surfaces of the two clamping members 200 are provided with grooves 210, and the second projection S2 falls within the first projection S1. This ensures that when the two clamping members 200 clamp the battery cell 30, the weld seam of the battery cell 30's casing is directly opposite the groove 210 of the clamping member 200, without direct contact with the clamping member 200. This prevents the weld seam of the battery cell 30 from cracking due to impact from the clamping member 200, ensuring the smooth conduct of the vibration test.

[0086] It should be noted that the weld seam of the outer casing of cell 30 is a long and thin strip shape, and its orthographic projection on the target plane should also be a long and thin strip shape. However, for the sake of simplicity... Figure 6 The second projection S2 is represented by a thin solid line.

[0087] like Figure 5 As shown, the groove 210 has a ring-shaped structure, and the part of the clamping member 200 surrounded by the groove 210 is a boss 220. The surfaces of the bosses 220 of the two clamping members 200 facing each other are used to abut against the outer surface of the battery cell 30.

[0088] In an embodiment, the surfaces of the protrusions 220 of the two clamping members 200 that face each other are used to abut against the large surface of the battery cell 30. Here, the large surface of the battery cell 30 refers to the surface with the largest area among the outer surfaces of the battery cell 30.

[0089] In an embodiment, the groove 210 is a rectangular ring structure, and includes two first groove segments 211 and two second groove segments 212. The two first groove segments 211 and the two second groove segments 212 are alternately connected end to end to form the rectangular ring structure. Here, the length direction of the first groove segment 211 is parallel to the second direction D2, and the two first groove segments 211 are arranged in the third direction D3. The length direction of the second groove segment 212 is parallel to the third direction D3, and the two second groove segments 212 are arranged in the second direction D2.

[0090] As shown in Figure 3 , the outer shell of the battery cell 30 includes a cylindrical side plate 31, a top plate 32, and a bottom plate 33. The cylindrical side plate 31 has openings at both ends, the top plate 32 is welded to one end of the cylindrical side plate 31 and closes one of the openings, and the bottom plate 33 is welded to the other end of the cylindrical side plate 31 and closes the other opening. That is, the top plate 32 and the cylindrical side plate 31 form a first weld 34 after being welded, and the bottom plate 33 and the cylindrical side plate 31 form a second weld 35 after being welded.

[0091] In the embodiments of the present application, as shown in Figure 3 and Figure 5 , in the first direction D1, the position of the first weld 34 corresponds to the position of one of the first groove segments 211, and the position of the second weld 35 corresponds to the position of the other first groove segment 211.

[0092] As shown in Figure 5 , the edges of the surfaces of the protrusions 220 of the two clamping members 200 that face each other are provided with chamfers 221.

[0093] In the embodiments of the present application, the edges of the protrusions 220 are provided with chamfers 221, which can avoid stress concentration at the contact position between the battery cell 30 and the protrusions 220, thereby avoiding deformation of the outer shell of the battery cell 30.

[0094] Optionally, the chamfer 221 can be a C-shaped chamfer or an R-shaped chamfer.

[0095] As shown in Figure 7 , the two clamping members 200 can be adjustably connected to the base 100, or one of the clamping members 200 can be adjustably connected to the base 100, and the other clamping member 200 can be fixedly connected to the base 100. The two clamping members 200 are defined as a first clamping member 200a and a second clamping member 200b. Next, an example in which the first clamping member 200a is adjustably connected to the base 100, and the second clamping member 200b is fixedly connected to the base 100 is described.

[0096] The first clamping member 200a is detachably connected to the base 100 by the first fastener 710, and the second clamping member 200b is also detachably connected to the base 100 by the first fastener 710.

[0097] For the first clamping member 200a, the position of the base 100 corresponding to the first clamping member 200a has a first assembly hole 110 passing through, the first assembly hole 110 is long strip-shaped, and the length direction thereof is parallel to the first direction D1, and the first fastener 710 is arranged in the first assembly hole 110 to fasten and connect the first clamping member 200a and the base 100.

[0098] In the embodiment of the present application, since the base 100 is provided with the first assembly hole 110 passing through, and the length direction of the first assembly hole 110 is parallel to the first direction D1, the first fastener 710 can be slightly moved in the length direction of the first assembly hole 110, thereby adjusting the distance between the two clamping members 200. When adjusting, only the first fastener 710 needs to be loosened, without the need to be disassembled, which simplifies the adjustment operation and improves the adjustment efficiency. In addition, the first fastener 710 cooperates with the first assembly hole 110, and the first fastener 710 can continuously move along the length direction of the first assembly hole 110, thereby realizing "stepless adjustment", so that the distance between the two clamping members 200 can be adjusted in a continuous range, and the adjustment precision is higher.

[0099] In an embodiment, the first assembly hole 110 can be a waist-shaped hole or a rectangular hole.

[0100] Of course, in other embodiments, the distance between the two clamping members 200 can also be adjusted by "step adjustment". For example, the base 100 is provided with a plurality of through holes, and the plurality of through holes are arranged at intervals along the first direction D1. The first fastener 710 can be inserted into any one of the through holes to fasten and connect the first clamping member 200a and the base 100.

[0101] For the second clamping member 200b, the position of the base 100 corresponding to the second clamping member 200b has a through hole passing through, the shape of the through hole is circular, and the first fastener 710 is arranged in the through hole to fasten and connect the base 100 and the second clamping member 200b.

[0102] Please refer back to Figure 3 and Figure 4 The clamp 20 further comprises at least one pressing plate 300, the pressing plate 300 is located on the side of the two clamping members 200 away from the base 100, and is detachably connected across the two clamping members 200.

[0103] In the embodiments of this application, at least one pressure plate 300 is provided on the side of the two clamping members 200 away from the base 100. The pressure plate 300 can play the role of assisting in limiting the battery cell 30 and preventing the battery cell 30 from coming out between the two clamping members 200 during vibration testing.

[0104] In one embodiment, the pressure plate 300 has two connecting portions 310, which are detachably connected to two clamping members 200 respectively, and at least one of the two connecting portions 310 is adjustablely connected to the corresponding clamping member 200 in a first direction D1.

[0105] In the embodiments of this application, since at least one of the two connecting parts 310 is adjustablely connected to the corresponding clamping member 200 in the first direction D1, the pressure plate 300 does not need to be removed from the clamping member 200 when adjusting the distance between the two clamping members 200, and the adjustment of the distance between the two clamping members 200 will not be affected, thus avoiding loss due to the pressure plate 300 being removed from the clamping member 200.

[0106] This application does not limit the number of pressure plates 300. For example, the number of pressure plates 300 can be one, two, three or other quantities.

[0107] like Figure 8 As shown, both connecting portions 310 can be adjustablely connected to the corresponding clamping member 200, or one connecting portion 310 can be adjustablely connected to the corresponding clamping member 200, while the other connecting portion 310 is fixedly connected to the corresponding clamping member 200. The two connecting portions 310 of the pressure plate 300 are defined as a first connecting portion 310a and a second connecting portion 310b, respectively. The first connecting portion 310a is adjustablely connected to the corresponding clamping member 200, and the second connecting portion 310b is fixedly connected to the corresponding clamping member 200.

[0108] The first connecting part 310a is detachably connected to the corresponding clamping member 200 via the second fastener 720, and the second connecting part 310b is also detachably connected to the corresponding clamping member 200 via the second fastener 720.

[0109] The first connecting part 310a has a through second mounting hole 311. The second mounting hole 311 is elongated and its length direction is parallel to the first direction D1. The second fastener 720 passes through the second mounting hole 311 to fasten the first connecting part 310a to the corresponding clamping member 200.

[0110] In the embodiment, the second connecting portion 310 is provided with the second assembly hole 311 penetrating therethrough, and the length direction of the second assembly hole 311 is parallel to the first direction D1, so that the second fastener 720 can be slightly moved in the length direction of the second assembly hole 311, and the position of the pressing plate 300 and the clamping piece 200 can be adjusted when the distance between the two clamping pieces 200 is adjusted. When adjusting, the second fastener 720 only needs to be loosened, and does not need to be removed, so that the adjusting operation is simplified, and the adjusting efficiency is improved. In addition, the second fastener 720 cooperates with the second assembly hole 311, and the second fastener 720 can be continuously moved in the length direction of the second assembly hole 311, so that the “stepless adjustment” is realized, the relative position of the pressing plate 300 and the clamping piece 200 can be adjusted in a continuous range, and the adjusting precision is higher.

[0111] In an embodiment, the second assembly hole 311 is a waist-shaped hole or a rectangular hole.

[0112] Of course, in other embodiments, the “stepless adjustment” can also be adopted between the pressing plate 300 and the clamping piece 200. For example, the first connecting portion 310a is provided with a plurality of through holes, and the plurality of through holes are arranged at intervals along the first direction D1. The second fastener 720 can be inserted into any one of the through holes to fasten and connect the clamping piece 200 and the connecting portion 310.

[0113] For the second connecting portion 310b, the second connecting portion 310b has a through hole penetrating therethrough, the shape of the through hole is circular, and the second fastener 720 is arranged in the through hole to fasten and connect the second connecting portion 310b and the clamping piece 200.

[0114] Please refer to Figure 3 and Figure 4 , the clamp 20 further comprises two spacers 400 arranged at intervals along the second direction D2, and the two spacers 400 are detachably connected between the two clamping pieces 200; and the mutually facing surfaces of the two spacers 400 are used to abut against the outer surface of the battery cell.

[0115] As shown in Figure 5 , the first projection S1 is a ring structure, the normal projection of the spacer 400 on the target plane is a third projection S3, and the third projection S3 is located outside the outer circle of the first projection S1.

[0116] In the embodiment, by arranging the two spacers 400 between the two clamping pieces 200, and the mutually facing surfaces of the two spacers 400 are used to abut against the outer surface of the battery cell, the battery cell 30 can be prevented from moving in the arrangement direction of the two spacers 400 during the vibration test.

[0117] In one embodiment, at least one of the two pads 400 is adjustablely connected to the two clamps 200 in the second direction D2.

[0118] In this embodiment of the application, the distance between the two pads 400 is adjustable. On the one hand, the clamp 20 can adapt to different sizes of battery cells 30. On the other hand, the surfaces of the two pads 400 facing each other can firmly abut against the outer surface of the battery cell 30, preventing the battery cell 30 from shifting in the second direction D2 during the vibration test.

[0119] like Figure 9 As shown, the two pads 400 can be adjustablely connected to the two clamping members 200, or one clamping member 200 can be adjustablely connected to both clamping members 200, while the other pad 400 is fixedly connected to both clamping members 200. The two pads 400 are defined as a first pad 400a and a second pad 400b, respectively. The following explanation will use the example of the first pad 400a being adjustablely connected to the two clamping members 200 and the second pad 400b being fixedly connected to the two clamping members 200.

[0120] The first pad 400a is detachably connected between the two clamping members 200 via the third fastener 730, and the second pad 400b is also detachably connected between the two clamping members 200 via the third fastener 730.

[0121] For the first pad 400a, the clamping member 200 has a through third mounting hole 230 in the part corresponding to the first pad 400a in the first direction D1. The third mounting hole 230 is elongated and its length direction is parallel to the second direction D2. The third fastener 730 passes through the third mounting hole 230 to fasten the clamping member 200 to the first pad 400a.

[0122] In this embodiment, since the clamping member 200 has a through third mounting hole 230, and the length direction of the third mounting hole 230 is parallel to the second direction D2, the third fastener 730 can move slightly along the length direction of the third mounting hole 230, thereby adjusting the relative position of the two clamping members 200 and the pad 400. During adjustment, only the third fastener 730 needs to be loosened, without needing to remove it, simplifying the adjustment operation and improving adjustment efficiency. Furthermore, the third fastener 730 cooperates with the third mounting hole 230, allowing it to move continuously along the third mounting hole 230, thus achieving "stepless adjustment." This allows the relative position between the two clamping members 200 and the pad 400 to be adjusted within a continuous range, resulting in higher adjustment precision.

[0123] In one embodiment, the third assembly hole 230 is an oblong hole or a rectangular hole.

[0124] Of course, in other embodiments, the relative positions of the two clamping members 200 and the first pad 400 can also adopt "step adjustment". For example, the clamping member 200 is provided with a plurality of through holes, and the plurality of through holes are arranged at intervals along the second direction D2. The third fastener 730 can be inserted into any one of the through holes to fasten and connect the clamping member 200 and the first pad 400a.

[0125] For the second pad 400b, the position corresponding to the clamping member 200 of the second pad 400b has a through hole penetrating through, the shape of the through hole is circular, and the third fastener 730 is arranged in the through hole to fasten and connect the clamping member 200 and the second pad 400b.

[0126] As shown in FIGS. 1, 2 and 3, the two clamping members 200 are arranged on the two sides of the base 100, and the two clamping members 200 are arranged at intervals along the second direction D2. Figure 3 Figure 4 As shown in FIGS. 1, 2 and 3, at least one of the surfaces of the two clamping members 200 away from each other is further provided with a first abutting member 500, the first abutting member 500 is detachably connected to the base 100, and abuts against the clamping member 200.

[0127] In the embodiments of the present application, by arranging the first abutting member 500 on the side of the surface of the two clamping members 200 away from each other, the structural strength of the clamping member 200 can be improved, and deformation of the clamping member 200 during long-term vibration can be avoided.

[0128] In an embodiment, the two sides of the first abutting member 500 are further provided with a second abutting member 600, the second abutting member 600 is fixedly connected to the clamping member 200, and abuts against the side surface of the base 100 facing the clamping member 200.

[0129] In the embodiments of the present application, the two sides of the first abutting member 500 are further provided with the second abutting member 600, and the second abutting member 600 can play a role in assisting to strengthen the strength of the clamping member 200, further avoiding deformation of the clamping member 200 during long-term vibration.

[0130] As an example, the second abutting member 600 is detachably connected to the first abutting member 500. For example, the second abutting member 600 and the first abutting member 500 are connected by bolts, but are not limited thereto.

[0131] In the embodiments of the present application, the second abutting member 600 is not only connected to the clamping member 200, but also connected to the first abutting member 500, which strengthens the structural strength of the whole of the clamping member 200, the first abutting member 500 and the second abutting member 600, and avoids deformation during long-term vibration.

[0132] As shown in FIGS. 1, 2 and 3, the two clamping members 200 are arranged on the two sides of the base 100, and the two clamping members 200 are arranged at intervals along the second direction D2. Figure 10 ​As shown, the first abutting member 500 is adjustably connected to the base 100 along the first direction D1. By arranging the first abutting member 500 to be adjustably connected to the base 100 along the first direction D1, when the distance between the two clamping members 200 is adjusted, the first abutting member 500 can also move accordingly, without affecting the effect of the first abutting member 500 on strengthening the strength of the clamping members 200.

[0133] As shown, the first abutting member 500 is adjustably connected to the base 100 along the first direction D1. By arranging the first abutting member 500 to be adjustably connected to the base 100 along the first direction D1, when the distance between the two clamping members 200 is adjusted, the first abutting member 500 can also move accordingly, without affecting the effect of the first abutting member 500 on strengthening the strength of the clamping members 200. Figure 10 As shown, the first abutting member 500 is adjustably connected to the base 100 along the first direction D1. By arranging the first abutting member 500 to be adjustably connected to the base 100 along the first direction D1, when the distance between the two clamping members 200 is adjusted, the first abutting member 500 can also move accordingly, without affecting the effect of the first abutting member 500 on strengthening the strength of the clamping members 200.

[0134] In the embodiments of the present application, since the base 100 is provided with the fourth assembly hole 120 that penetrates through the base 100 and the length direction of the fourth assembly hole 120 is parallel to the first direction D1, the fourth fastener 740 can move slightly in the length direction of the fourth assembly hole 120, thereby adjusting the position of the first abutting member 500 relative to the base 100. When adjusting, only the fourth fastener 740 needs to be loosened, without the need to remove the fourth fastener 740, thereby simplifying the adjustment operation and improving the adjustment efficiency. In addition, the fourth fastener 740 cooperates with the fourth assembly hole 120, and the fourth fastener 740 can continuously move along the fourth assembly hole 120, thereby realizing "stepless adjustment", so that the position of the first abutting member 500 relative to the base 100 can be adjusted in a continuous range, with higher adjustment accuracy.

[0135] In an embodiment, the fourth assembly hole 120 is a waist-shaped hole or a rectangular hole.

[0136] Of course, in other embodiments, "step adjustment" can also be adopted between the first abutting member 500 and the base 100. For example, the base 100 is provided with a plurality of through holes, and the plurality of through holes are arranged at intervals along the first direction D1. The fourth fastener 740 can be inserted into any one of the through holes to fasten the first abutting member 500 and the base 100.

[0137] In an embodiment, the first fastener 710, the second fastener 720, the third fastener 730, and the fourth fastener 740 can all be bolts.

[0138] It can be understood that the various embodiments / embodiments provided by the present application can be combined with each other without contradiction, and will not be repeated here.

[0139] In the embodiments of the application, the terms "first", "second", "third" are only used for descriptive purpose and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connection", "fixing" and the like should be interpreted broadly, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0140] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the application and simplify the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, should not be understood as a limitation on the embodiments of the application.

[0141] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0142] The above is only the preferred embodiment of the application, and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application should be included in the protection scope of the application.

Claims

1. A test fixture, characterized in that, include: Base; as well as A first clamping member and a second clamping member are spaced apart and mounted on the base. At least one of the first clamping member and the second clamping member is adjustablely connected to the base in a first direction. The surfaces of the first clamping member and the second clamping member that face each other are used to abut against the outer surface of the test object. The first direction is the arrangement direction of the first clamping member and the second clamping member. Wherein, the surfaces of the first clamping member and the second clamping member facing each other are provided with grooves, the orthographic projection of the grooves on the target plane is the first projection, the test object has a weld, the orthographic projection of the weld on the target plane is the second projection, and the second projection falls within the first projection; The target plane is perpendicular to the first direction.

2. The test fixture according to claim 1, characterized in that, The groove is a ring-shaped structure, and the portion of each of the first clamping member and the second clamping member surrounded by the groove is a boss. The surfaces of the bosses of the first clamping member and the second clamping member facing each other are used to abut against the outer surface of the test object.

3. The test fixture according to claim 2, characterized in that, The edges of the surfaces of the protrusions of the first clamping member and the second clamping member facing each other are chamfered.

4. The test fixture according to claim 1, characterized in that, At least one of the first clamping member and the second clamping member is detachably connected to the base by a first fastener; The base has a through first mounting hole, which is elongated and parallel to the first direction. The first fastener passes through the first mounting hole to securely connect at least one of the first clamping member and the second clamping member to the base.

5. The test fixture according to claim 1, characterized in that, The clamp further includes at least one pressure plate located on the side of the first clamping member and the second clamping member away from the base, and detachably straddling the first clamping member and the second clamping member.

6. The test fixture according to claim 5, characterized in that, The pressure plate has two connecting portions, which are detachably connected to the first clamping member and the second clamping member, respectively. At least one of the two connecting portions is adjustablely connected to at least one of the first clamping member and the second clamping member in the first direction.

7. The test fixture according to claim 6, characterized in that, At least one of the connecting portions is detachably connected to at least one of the first clamping member and the second clamping member via a second fastener; The connecting part has a through second mounting hole, which is elongated and parallel to the first direction in length. The second fastener passes through the second mounting hole to securely connect the connecting part to the corresponding clamping member.

8. The test fixture according to claim 1, characterized in that, The clamp also includes two spaced pads arranged along a second direction, the pads being detachably connected between the first clamping member and the second clamping member; the surfaces of the two pads facing each other are used to abut against the outer surface of the test object; The first projection is a ring structure, and the orthographic projection of the pad on the target plane is the third projection, which is located outside the outer ring of the first projection; The second direction is perpendicular to the first direction.

9. The test fixture according to claim 8, characterized in that, At least one of the two pads is adjustablely connected to the first clamp and the second clamp in the second direction.

10. The test fixture according to claim 9, characterized in that, At least one of the pads is detachably connected between the first clamping member and the second clamping member by a third fastener; The first clamping member and the second clamping member have a through third mounting hole in the portion of the first clamping member corresponding to the pad block in the first direction. The third mounting hole is elongated and its length direction is parallel to the second direction. The third fastener passes through the third mounting hole to fasten the first clamping member and the second clamping member to the pad block.

11. The test fixture according to claim 1, characterized in that, A first abutment is provided on one side of at least one of the surfaces of the first clamping member and the second clamping member that face away from each other. The first abutment is detachably connected to the base and abuts against the corresponding clamping member.

12. The test fixture according to claim 11, characterized in that, The first abutment is adjustablely connected to the base along the first direction.

13. The test fixture according to claim 12, characterized in that, The first abutment is detachably connected to the base by a fourth fastener; The base has a through fourth mounting hole, which is elongated and parallel to the first direction. The fourth fastener passes through the fourth mounting hole to securely connect the first abutment to the base.

14. The test fixture according to claim 11, characterized in that, The first abutment is further provided with second abutment members on both sides along the second direction. The second abutment members are fixedly connected to the corresponding clamping members and abut against the side surface of the base facing the first clamping member and the second clamping member. The second direction is perpendicular to the first direction.

15. The test fixture according to claim 14, characterized in that, The second abutment is detachably connected to the first abutment.

16. A testing apparatus, characterized in that, include: Vibration table; as well as The test fixture according to any one of claims 1-15 is mounted on the vibration table.

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