Cylindrical battery expansive force test clamp

Abstract

The utility model relates to a clamp for testing expansion force of a cylindrical battery. Relates to the technical field of battery testing. The device specifically comprises a base internally provided with a containing cavity, a pressure sensor fixedly installed in the containing cavity, a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are oppositely arranged in the containing cavity in a spaced mode, the cylindrical battery is arranged in the containing cavity, and the first clamping piece and the second clamping piece clamp and fix the cylindrical battery on the two sides respectively; the first clamping piece is connected with the base in a sliding mode, the pressure sensor abuts against the first clamping piece, and the installation position of the second clamping piece on the base can be adjusted. By adjusting the mounting position of the second clamping piece on the base, the first clamping piece and the second clamping piece can clamp and fix the cylindrical batteries with different shell diameters on the two sides, so that the test fixture can be suitable for the expansion force test of the cylindrical batteries with various specifications, the compatibility is stronger, and the production cost is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a cylindrical battery expansion force tester.

[0002] fixture. Background Art

[0003] With the development of battery energy storage technology, batteries are increasingly being used in new energy and smart grid applications. During the battery's charge and discharge cycles, electrochemical reactions within the battery produce gas. This gas exerts a force on the battery casing, defined as expansion force, causing the battery to expand. This not only affects the battery lifespan but can also cause damage if the expansion force exceeds the battery's allowable limit, leading to safety accidents. Therefore, conducting expansion force testing on batteries throughout their lifecycle is crucial for improving their performance and safety.

[0004] Existing cylindrical battery expansion force test fixtures are typically designed for a single cylindrical battery size and therefore only work with that specific battery size, resulting in poor compatibility. During battery production, multiple test fixtures are often required for different cylindrical battery sizes, increasing production costs and failing to meet current production needs. Utility Model Content

[0005] The purpose of the present invention is to provide a cylindrical battery expansion force testing fixture to address the deficiencies of the above-mentioned prior art, which can be applied to the expansion force testing of cylindrical batteries of various specifications, has strong compatibility, and thus reduces production costs.

[0006] The utility model proposes a cylindrical battery expansion force testing fixture, comprising a base with an accommodating cavity, a pressure sensor fixedly installed in the accommodating cavity, and a first clamping member and a second clamping member arranged at relative intervals in the accommodating cavity. The cylindrical battery is arranged in the accommodating cavity, and the first clamping member and the second clamping member respectively clamp and fix the cylindrical battery on both sides; the first clamping member is slidably connected to the base, the pressure sensor abuts against the first clamping member, and the installation position of the second clamping member on the base is adjustable.

[0007] Furthermore, the base includes a horizontally arranged bottom plate, and a front side plate, a rear side plate and a left side plate vertically arranged on the bottom plate, the front side plate, the rear side plate and the left side plate are connected end to end, and the bottom plate, the front side plate, the rear side plate and the left side plate surround the accommodating cavity.

[0008] Furthermore, the first clamping member includes a first mounting seat slidably connected to the base, a first arc-shaped clamping claw for limiting one side of the cylindrical battery along the circumferential direction, and a first connecting rod connecting the first arc-shaped clamping claw and the first mounting seat, the first connecting rod is arranged on one side of the first mounting seat, and the pressure sensor abuts against the side opposite to the first mounting seat.

[0009] Furthermore, a slide groove is provided on the side wall of the accommodating cavity, and the slide groove extends in a horizontal direction. A slider is provided at the end of the first mounting seat, and the slider is slidably matched with the slide groove.

[0010] Furthermore, the two slide grooves are respectively provided on the opposite side walls of the accommodating cavity, and the slide grooves connect the accommodating cavity with the outside world. The two sliders are respectively provided at both ends of the first mounting seat, and the two sliders respectively pass through the two slide grooves.

[0011] Furthermore, the second clamping member includes a second mounting seat installed on the base, a second arc-shaped clamping claw for limiting the other side of the cylindrical battery along the circumferential direction, and a second connecting rod connecting the second arc-shaped clamping claw and the second mounting seat, and the installation position of the second mounting seat on the base is adjustable.

[0012] Furthermore, a plurality of mounting grooves distributed in an array along a horizontal direction are provided on the side wall of the accommodating cavity, and the end of the second mounting seat is plugged into and matched with one of the mounting grooves, and the mounting groove is used to limit the second mounting seat.

[0013] Furthermore, a plurality of mounting grooves distributed in a horizontal array are provided on the two opposite side walls of the accommodating cavity, one end of the second mounting seat is plugged into and matched with one of the mounting grooves on one side wall of the accommodating cavity, and the other end is plugged into and matched with one of the mounting grooves on the other side wall of the accommodating cavity.

[0014] Furthermore, a through hole is provided on the second mounting seat, one end of the second connecting rod is connected to the second arc-shaped clamping claw, and the other end passes through the through hole, and the second clamping member also includes a locking knob threadedly connected to one end of the second connecting rod passing through the through hole.

[0015] Furthermore, the second clamping member includes a spring sleeved on the second connecting rod, one end of the spring abuts against the second arc-shaped clamping claw, and the other end abuts against the second mounting seat.

[0016] The cylindrical battery expansion force testing fixture proposed in this utility model has the following beneficial effects:

[0017] (1) This test fixture can adjust the distance between the first clamping member and the second clamping member by adjusting the installation position of the second clamping member on the base, so that the first clamping member and the second clamping member can clamp and fix cylindrical batteries with different shell diameters on both sides, thereby making this test fixture applicable to the expansion force test of cylindrical batteries of various specifications, with strong compatibility and reduced production costs;

[0018] (2) The first mounting seat of the test fixture is slidably connected to the base, and the first arc-shaped clamping claw limits the cylindrical battery along the circumferential direction on one side thereof, so that when the cylindrical battery expands, the trigger end of the pressure sensor is squeezed through the first mounting seat, so that the pressure sensor obtains the expansion force information of the cylindrical battery, thereby realizing the expansion force test of the cylindrical battery;

[0019] (3) A slide groove is provided on each of the two opposite side walls of the accommodating cavity of the test fixture, and the slide groove runs through the side wall of the accommodating cavity. A slider is provided at each end of the first mounting seat. Through the sliding cooperation between the two sliders and the two slide grooves, the stability of the sliding connection between the first mounting seat and the base is enhanced, thereby enhancing the stability of the test fixture structure and making the expansion force test of the cylindrical battery more accurate;

[0020] (4) This test fixture clamps and fixes the cylindrical battery along the circumferential direction on both sides through the first arc-shaped clamping jaw and the second arc-shaped clamping jaw. On the one hand, it is to make the first clamping member and the second clamping member clamp and fix the cylindrical battery more firmly, so that the expansion force test of the cylindrical battery is more accurate; on the other hand, it is to make the expansion force generated by the expansion of the cylindrical battery better transmitted to the pressure sensor through the first clamping member, further making the expansion force test of the cylindrical battery more accurate;

[0021] (5) The side wall of the accommodating cavity of the test fixture is provided with a plurality of mounting grooves distributed in an array along the horizontal direction. The end of the second mounting seat is plugged into the corresponding mounting groove, so that the mounting groove limits the second mounting seat, thereby adjusting the installation position of the second mounting seat on the base, and further adjusting the distance between the first clamping member and the second clamping member, so that the first clamping member and the second clamping member can clamp and fix cylindrical batteries with different shell diameters;

[0022] (6) The second clamping member of the test fixture also includes a locking knob, which is screwed to one end of the second connecting rod passing through the through hole. By tightening or loosening the locking knob, the second connecting rod can be adjusted to extend to the inside and outside of the second mounting seat, further enabling the test fixture to be applicable to the expansion force test of cylindrical batteries of various specifications, with strong compatibility and reduced production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0024] Figure 1 This is a schematic structural diagram of a cylindrical battery expansion force testing fixture according to an embodiment of the present utility model;

[0025] Figure 2 This is a structural schematic diagram of a base of a cylindrical battery expansion force testing fixture according to an embodiment of the present utility model;

[0026] Figure 3 This is a structural schematic diagram of a first clamping member of a cylindrical battery expansion force testing fixture according to an embodiment of the present utility model;

[0027] Figure 4 This is a structural schematic diagram of the second clamping member of a cylindrical battery expansion force testing fixture according to an embodiment of the present utility model.

[0028] In the figure: 1. base; 11. accommodating cavity; 12. bottom plate; 13. front side plate; 131. slide groove; 132. mounting groove; 14. rear side plate; 15. left side plate; 2. pressure sensor; 3. first clamping member; 31. first mounting seat; 311. slider; 32. first arc-shaped clamping jaw; 33. first connecting rod; 4. second clamping member; 41. second mounting seat; 42. second arc-shaped clamping jaw; 43. second connecting rod; 44. locking knob; 45. spring; 5. cylindrical battery. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 4 A cylindrical battery expansion force testing fixture according to an embodiment of the present invention includes a base 1 with an accommodating cavity 11, a pressure sensor 2 fixedly installed in the accommodating cavity 11, and a first clamping member 3 and a second clamping member 4 arranged relatively spaced apart in the accommodating cavity 11. A cylindrical battery 5 is arranged in the accommodating cavity 11, and the first clamping member 3 and the second clamping member 4 clamp and fix the cylindrical battery 5 on both sides respectively; the first clamping member 3 is slidably connected to the base 1, the pressure sensor 2 abuts against the first clamping member 3, and the installation position of the second clamping member 4 on the base 1 is adjustable.

[0031] In the present application, the test fixture includes a base 1, a pressure sensor 2, a first clamping member 3 and a second clamping member 4. A accommodating cavity 11 is provided in the base 1, the pressure sensor 2 is fixedly installed in the accommodating cavity 11, and the first clamping member 3 and the second clamping member 4 are relatively spaced apart in the accommodating cavity 11, wherein the first clamping member 3 is provided on a side close to the pressure sensor 2, and the second clamping member 4 is provided on a side away from the pressure sensor 2.

[0032] When testing the expansion force of a cylindrical battery 5, the cylindrical battery 5 is placed in the accommodating cavity 11, with the first clamping member 3 and the second clamping member 4 clamping and securing the cylindrical battery 5 on either side. Because the first clamping member 3 is slidably connected to the base 1, the trigger end of the pressure sensor 2 abuts the first clamping member 3. Therefore, when the cylindrical battery 5 expands, the first clamping member 3 squeezes the trigger end of the pressure sensor 2, allowing the pressure sensor 2 to obtain information about the expansion force of the cylindrical battery 5, thereby completing the expansion force test of the cylindrical battery 5 and ensuring the safety of the cylindrical battery 5.

[0033] It is foreseeable that cylindrical batteries 5 of different specifications have different shell diameters. In the present application, the installation position of the second clamping member 4 on the base 1 is adjustable. Therefore, by adjusting the installation position of the second clamping member 4 on the base 1, the spacing between the first clamping member 3 and the second clamping member 4 can be adjusted, so that the first clamping member 3 and the second clamping member 4 can clamp and fix cylindrical batteries 5 with different shell diameters on both sides. In turn, this test fixture is applicable to the expansion force testing of cylindrical batteries 5 of various specifications, has strong compatibility, and reduces production costs.

[0034] In this embodiment, the base 1 includes a bottom plate 12, a front side plate 13, a rear side plate 14 and a left side plate 15. The bottom plate 12 is arranged horizontally, and the front side plate 13, the rear side plate 14 and the left side plate 15 are arranged vertically on the bottom plate 12, so that the front side plate 13, the rear side plate 14 and the left side plate 15 are connected end to end, so that the bottom plate 12, the front side plate 13, the rear side plate 14 and the left side plate 15 surround a receiving cavity 11 with a top and a right side opening, so that the cylindrical battery 5 can be placed in the receiving cavity 11 through the opening of the receiving cavity 11.

[0035] In this embodiment, the first clamping member 3 includes a first mounting seat 31 that is slidably connected to the base 1, a first arc-shaped clamping jaw 32 that circumferentially limits one side of the cylindrical battery 5, and a first connecting rod 33 connecting the first arc-shaped clamping jaw 32 and the first mounting seat 31. The first connecting rod 33 is disposed on one side of the first mounting seat 31, and the pressure sensor 2 abuts against the side opposite the first mounting seat 31. In this application, the first clamping member 3 includes the first mounting seat 31, the first arc-shaped clamping jaw 32, and the first connecting rod 33. The first mounting seat 31 is slidably connected to the base 1, and the first connecting rod 33 connects the first mounting seat 31 and the first arc-shaped clamping jaw 32.

[0036] When performing an expansion force test on the cylindrical battery 5, the first arc-shaped clamping claw 32 limits the cylindrical battery 5 circumferentially on one side, the first connecting rod 33 is located on one side of the first mounting seat 31, and the pressure sensor 2 abuts against the first mounting seat 31 on the opposite side. Therefore, when the cylindrical battery 5 expands, the trigger end of the pressure sensor 2 is squeezed by the first mounting seat 31, so that the pressure sensor 2 obtains the expansion force information of the cylindrical battery 5, thereby realizing the expansion force test of the cylindrical battery 5.

[0037] In this embodiment, a slide groove 131 is provided on the side wall of the accommodating cavity 11, and the slide groove 131 extends in the horizontal direction. A slider 311 is provided at the end of the first mounting seat 31, and the slider 311 slides in cooperation with the slide groove 131 to achieve a sliding connection between the first mounting seat 31 and the base 1.

[0038] In the present application, the first mounting seat 31 is slidably connected to the base 1, on the other hand, so that before the cylindrical battery 5 is placed in the accommodating cavity 11, the first mounting seat 31 can be slidably connected to the base 1 to adjust the position of the first clamping member 3 in the accommodating cavity 11, so that the first clamping member 3 is in contact with the pressure sensor 2 fixedly installed in the accommodating cavity 11, and at the same time, sufficient space is reserved for the placement of the cylindrical battery 5. After the cylindrical battery 5 is placed in the accommodating cavity 11, the installation position of the second clamping member 4 on the base 1 is adjusted, and the distance between the first clamping member 3 and the second clamping member 4 is adjusted, so that the first clamping member 3 and the second clamping member 4 can clamp and fix the cylindrical batteries 5 with different shell diameters on both sides.

[0039] On the other hand, after the first clamping member 3 and the second clamping member 4 clamp and fix the cylindrical battery 5, when the cylindrical battery 5 expands, the first mounting seat 31 is slidably connected to the base 1, so that the first mounting seat 31 squeezes the trigger end of the pressure sensor 2, so that the pressure sensor 2 can accurately detect the expansion force of the cylindrical battery 5, further ensuring the safety performance of the cylindrical battery 5.

[0040] In this embodiment, two slide grooves 131 are provided on opposite side walls of the accommodating chamber 11, connecting the accommodating chamber 11 to the outside world. Two sliders 311 are provided at both ends of the first mounting base 31, and the two sliders 311 extend through the two slide grooves 131. In this application, a slide groove 131 is provided on each of the opposite side walls of the accommodating chamber 11, and the slide grooves 131 extend through the side walls of the accommodating chamber 11, thereby connecting the accommodating chamber 11 to the outside world.

[0041] A slider 311 is provided at each end of the first mounting seat 31. When the first mounting seat 31 is connected to the base 1, the sliders 311 at both ends are respectively plugged into the two slide grooves 131 on the opposite side walls of the accommodating cavity 11, and the two sliders 311 respectively pass through the two slide grooves 131. Therefore, through the sliding cooperation between the two sliders 311 and the two slide grooves 131, the stability of the sliding connection between the first mounting seat 31 and the base 1 is enhanced, thereby enhancing the stability of the test fixture structure and making the expansion force test of the cylindrical battery 5 more accurate.

[0042] Specifically, in actual implementation, the pressure sensor 2 can be fixedly installed on the inner side of the left side plate 15, and the two slide grooves 131 can be respectively set on the front side plate 13 and the rear side plate 14, and extend horizontally on the front side plate 13 and the rear side plate 14, so that the sliders 311 at both ends of the first mounting seat 31 slide with the two slide grooves 131 respectively, so that the first mounting seat 31 can move left and right in the accommodating cavity 11, that is, the first clamping member 3 can move left and right in the accommodating cavity 11, and then when performing the expansion force test of the cylindrical battery 5, the first clamping member 3 can be moved to the left to abut against the pressure sensor 2 fixedly installed on the inner side of the left side plate 15.

[0043] In this embodiment, the second clamping member 4 includes a second mounting seat 41 mounted on the base 1, a second arc-shaped clamping jaw 42 that limits the other side of the cylindrical battery 5 along the circumferential direction, and a second connecting rod 43 connecting the second arc-shaped clamping jaw 42 and the second mounting seat 41. The mounting position of the second mounting seat 41 on the base 1 is adjustable. In this application, the second clamping member 4 includes the second mounting seat 41, the second arc-shaped clamping jaw 42, and the second connecting rod 43. The second mounting seat 41 is mounted on the base 1, and the second connecting rod 43 connects the second mounting seat 41 and the second arc-shaped clamping jaw 42.

[0044] When conducting an expansion force test of the cylindrical battery 5, the first mounting seat 31 is first slidably connected to the base 1, and the position of the first clamping member 3 in the accommodating cavity 11 is adjusted so that the first clamping member 3 abuts against the pressure sensor 2 fixedly installed in the accommodating cavity 11. The cylindrical battery 5 is then placed in the accommodating cavity 11 so that the first arc-shaped clamping claw 32 limits the cylindrical battery 5 circumferentially on one side. Finally, by adjusting the installation position of the second mounting seat 41 on the base 1, the distance between the first clamping member 3 and the second clamping member 4 is adjusted so that the second arc-shaped clamping claw 42 limits the cylindrical battery 5 circumferentially on the other side, thereby allowing the first clamping member 3 and the second clamping member 4 to clamp and fix the cylindrical battery 5 on both sides.

[0045] In the present application, the first arc-shaped clamping jaw 32 and the second arc-shaped clamping jaw 42 are provided to clamp and fix the cylindrical battery 5 along the circumferential direction on both sides. On the one hand, it is to make the clamping and fixing of the cylindrical battery 5 by the first clamping member 3 and the second clamping member 4 more stable, thereby making the expansion force test of the cylindrical battery 5 more accurate; on the other hand, it is to make the expansion force generated by the expansion of the cylindrical battery 5 better transmitted to the pressure sensor 2 through the first clamping member 3, further making the expansion force test of the cylindrical battery 5 more accurate.

[0046] Since in the present application, the diameters of the first arc-shaped clamping jaw 32 and the second arc-shaped clamping jaw 42 are fixed, in order to ensure that the first clamping member 3 and the second clamping member 4 can clamp and fix cylindrical batteries 5 with different shell diameters, so that the test fixture is suitable for expansion force testing of cylindrical batteries 5 of different specifications, it can be foreseen that: in the present application, the shell diameter of the cylindrical battery 5 is less than or equal to the diameter of the first arc-shaped clamping jaw 32 and the second arc-shaped clamping jaw 42.

[0047] When the outer shell diameter of the cylindrical battery 5 is smaller than the diameters of the first arc-shaped clamping jaw 32 and the second arc-shaped clamping jaw 42, although the first arc-shaped clamping jaw 32 and the second arc-shaped clamping jaw 42 cannot completely fit with the outer shell of the cylindrical battery 5, their partial areas are in contact with the outer shell of the cylindrical battery 5, and the cylindrical battery 5 can still be clamped and fixed, thereby realizing the test of the expansion force of the cylindrical battery 5.

[0048] Specifically, in this embodiment, a plurality of mounting grooves 132 distributed in a horizontal array are provided on the side walls of the accommodating cavity 11. The end of the second mounting seat 41 is plugged into the corresponding mounting groove 132 to limit the second mounting seat 41, thereby realizing the adjustment of the installation position of the second mounting seat 41 on the base 1, and then realizing the adjustment of the distance between the first clamping member 3 and the second clamping member 4, so that the first clamping member 3 and the second clamping member 4 can clamp and fix the cylindrical batteries 5 with different shell diameters.

[0049] Furthermore, in this embodiment, a plurality of mounting grooves 132 distributed in a horizontal array are provided on the two opposite side walls of the accommodating cavity 11. When the second mounting seat 41 is installed on the base 1, one end of the second mounting seat 41 is plugged into and matched with one of the mounting grooves 132 on one side wall of the accommodating cavity 11, and the other end is plugged into and matched with the corresponding mounting groove 132 on the other side wall of the accommodating cavity 11, so that the mounting grooves 132 on the two opposite side walls of the accommodating cavity 11 simultaneously limit the second mounting seat 41, making the installation of the second mounting seat 41 on the base 1 more stable, thereby making the installation of the second clamping member 4 on the base 1 more stable, thereby enhancing the stability of the test fixture structure and making the expansion force test of the cylindrical battery 5 more accurate.

[0050] In the previous embodiment, it was mentioned that two slide grooves 131 can be respectively provided on the front side panel 13 and the rear side panel 14, and extend horizontally on the front side panel 13 and the rear side panel 14, so that the first mounting seat 31 can move left and right within the accommodating cavity 11. In actual implementation, a plurality of mounting grooves 132 distributed in an array along the horizontal direction can be provided on each of the front side panel 13 and the rear side panel 14. By plugging and mating the two ends of the second mounting seat 41 with the corresponding mounting grooves 132, the installation position of the second clamping member 4 on the base 1 in the left and right direction can be adjusted, thereby adjusting the spacing between the first clamping member 3 and the second clamping member 4.

[0051] In this embodiment, a through-hole is provided in the second mounting base 41. One end of a second connecting rod 43 is connected to the second arc-shaped clamping jaw 42, and the other end extends through the through-hole. The second clamping member 4 also includes a locking knob 44. The second connecting rod 43 is provided with external threads, and the locking knob 44 is provided with internal threads. At one end of the second connecting rod 43 extending through the through-hole, the internal and external threads cooperate to thread the locking knob 44 onto the second connecting rod 43.

[0052] When the locking knob 44 is screwed onto the second connecting rod 43 and abuts against the outer side surface of the second mounting seat 41, the second connecting rod 43 is fixed to the second mounting seat 41; when the locking knob 44 is screwed onto the second connecting rod 43 and away from the outer side surface of the second mounting seat 41, since the second connecting rod 43 is plug-fitted into the through hole on the second mounting seat 41, the second connecting rod 43 can move left and right on the second mounting seat 41, thereby adjusting the extension length of the second connecting rod 43 on the inner side (the side close to the cylindrical battery 5) and the outer side (the side away from the cylindrical battery 5) of the second mounting seat 41.

[0053] When conducting an expansion force test of the cylindrical battery 5, after adjusting the spacing between the first clamping member 3 and the second clamping member 4 by plugging the two ends of the second mounting seat 41 into the corresponding mounting grooves 132, the second connecting rod 43 can be further adjusted to extend on the inner and outer sides of the second mounting seat 41 so that the second arc-shaped clamping claw 42 at the end of the second connecting rod 43 abuts against the cylindrical battery 5, and then the locking knob 44 is tightened to fix the second connecting rod 43 on the second mounting seat 41, so that the first arc-shaped clamping claw 32 and the second arc-shaped clamping claw 42 clamp the cylindrical battery 5 on both sides, further making the expansion force test of the cylindrical battery 5 more accurate.

[0054] In this embodiment, the second clamping member 4 includes a spring 45 sleeved on the second connecting rod 43, one end of the spring 45 abuts against the second arc-shaped clamping claw 42, and the other end abuts against the second mounting seat 41. In the present application, the spring 45 is sleeved on the inner side of the second connecting rod 43. On the one hand, the extension length of the second connecting rod 43 on the inner and outer sides of the second mounting seat 41 can be adjusted so that when the second arc-shaped clamping claw 42 located at the end of the second connecting rod 43 abuts against the cylindrical battery 5, the elastic deformation ability of the spring 45 can make the first arc-shaped clamping claw 32 and the second arc-shaped clamping claw 42 clamp the cylindrical battery 5 more tightly on both sides, thereby making the expansion force test of the cylindrical battery 5 more accurate; on the other hand, when the cylindrical battery 5 expands to a large extent, the spring 45 provides buffering, which can improve the safety and stability of the test fixture.

[0055] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of the present invention.

[0056] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0057] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A cylindrical battery expansion force test fixture, characterized by: The invention comprises a base (1) having an accommodating cavity (11), a pressure sensor (2) fixedly mounted in the accommodating cavity (11), and a first clamping member (3) and a second clamping member (4) arranged relatively spaced apart in the accommodating cavity (11); a cylindrical battery (5) is arranged in the accommodating cavity (11); the first clamping member (3) and the second clamping member (4) clamp and fix the cylindrical battery (5) on both sides respectively; the first clamping member (3) is slidably connected to the base (1), the pressure sensor (2) abuts against the first clamping member (3), and the mounting position of the second clamping member (4) on the base (1) is adjustable.

2. A cylindrical battery expansion force testing fixture as claimed in claim 1, characterized in that: The base (1) comprises a bottom plate (12) arranged horizontally, and a front side plate (13), a rear side plate (14) and a left side plate (15) arranged vertically on the bottom plate (12), wherein the front side plate (13), the rear side plate (14) and the left side plate (15) are connected end to end, and the bottom plate (12), the front side plate (13), the rear side plate (14) and the left side plate (15) enclose the accommodating cavity (11).

3. A cylindrical battery expansion force testing fixture as claimed in claim 1, characterized in that: The first clamping member (3) includes a first mounting seat (31) slidably connected to the base (1), a first arc-shaped clamping claw (32) for limiting one side of the cylindrical battery (5) along the circumferential direction, and a first connecting rod (33) connecting the first arc-shaped clamping claw (32) and the first mounting seat (31), wherein the first connecting rod (33) is arranged on one side of the first mounting seat (31), and the pressure sensor (2) abuts against the side opposite to the first mounting seat (31).

4. A cylindrical battery expansion force testing fixture as claimed in claim 3, characterized in that: A sliding groove (131) is provided on the side wall of the accommodating cavity (11), and the sliding groove (131) extends in a horizontal direction. A sliding block (311) is provided at the end of the first mounting seat (31), and the sliding block (311) is slidably engaged with the sliding groove (131).

5. A cylindrical battery expansion force testing fixture as claimed in claim 4, characterized in that: The two slide grooves (131) are respectively provided on the two opposite side walls of the accommodating cavity (11), and the slide grooves (131) connect the accommodating cavity (11) with the outside world. The two sliders (311) are respectively provided at the two ends of the first mounting seat (31), and the two sliders (311) respectively pass through the two slide grooves (131).

6. A cylindrical battery expansion force testing fixture according to any one of claims 1 to 5, characterized in that: The second clamping member (4) comprises a second mounting seat (41) mounted on the base (1), a second arc-shaped clamping claw (42) for limiting the other side of the cylindrical battery (5) along the circumferential direction, and a second connecting rod (43) connecting the second arc-shaped clamping claw (42) and the second mounting seat (41), and the mounting position of the second mounting seat (41) on the base (1) is adjustable.

7. A cylindrical battery expansion force testing fixture as claimed in claim 6, characterized in that: A plurality of mounting grooves (132) distributed in an array along a horizontal direction are provided on the side wall of the accommodating cavity (11); an end portion of the second mounting seat (41) is plugged into and engaged with one of the mounting grooves (132); and the mounting groove (132) is used to limit the second mounting seat (41).

8. A cylindrical battery expansion force testing fixture as claimed in claim 7, characterized in that: A plurality of mounting grooves (132) distributed in a horizontal array are provided on opposite side walls of the accommodating cavity (11), one end of the second mounting seat (41) is plugged into and fitted with one of the mounting grooves (132) on one side wall of the accommodating cavity (11), and the other end is plugged into and fitted with one of the mounting grooves (132) on the other side wall of the accommodating cavity (11).

9. A cylindrical battery expansion force testing fixture as claimed in claim 6, characterized in that: A through hole is provided on the second mounting seat (41); one end of the second connecting rod (43) is connected to the second arc-shaped clamping claw (42), and the other end passes through the through hole; the second clamping member (4) further comprises a locking knob (44) threadedly connected to one end of the second connecting rod (43) passing through the through hole.

10. A cylindrical battery expansion force testing fixture as claimed in claim 9, characterized in that: The second clamping member (4) comprises a spring (45) sleeved on the second connecting rod (43), one end of the spring (45) abuts against the second arc-shaped clamping claw (42), and the other end abuts against the second mounting seat (41).

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