Extrusion test tool for cylindrical battery

Abstract

The utility model relates to the technical field of battery detection, and discloses an extrusion test tool for a cylindrical battery, which comprises a carrier plate, and a first clamping assembly and a second clamping assembly which are detachably mounted on the carrier plate. When the first clamping assembly is installed on the carrying plate, a first clamping area is formed, and the first clamping assembly is used for fixing the cylindrical battery and enabling the axial direction of the cylindrical battery to be perpendicular to the pressed face of the carrying plate. When the second clamping assembly is installed on the carrying plate, a second clamping area is formed, and the second clamping assembly is used for fixing the cylindrical battery and enabling the axial direction of the cylindrical battery to be parallel to the pressed face of the carrying plate. The design form of the tool is a detachable structure, extrusion in different directions can be achieved by replacing accessories, the applicability is wide, and extrusion in two directions can be achieved through the same set of tool.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to an extrusion test tool for a cylindrical battery. Background Art

[0002] As a new energy source, the safety of power lithium-ion batteries has received much attention. Among them, the extrusion test is an important detection method that simulates the deformation of batteries caused by external forces during driving or transportation. In the extrusion test, cylindrical batteries are not easy to be extruded in different directions due to their own appearance characteristics. Therefore, designing a set of tooling for cylindrical battery extrusion is the primary consideration in the extrusion test.

[0003] Currently, most extrusion test equipment is horizontal in structure. Lithium batteries need to be placed vertically on the test back plate, and most of them are fixed to the back plate by adhesive tape. For batteries with larger capacity, there is a risk of falling off. In addition, lithium batteries are difficult to stick tightly to the back plate, resulting in a certain gap between the battery and the back plate, which will cause differences in test data.

[0004] In the extrusion test, the battery is extruded along the axial direction. Due to the limitation of the battery structure, the battery cannot be fixed and interferes with the extrusion head during the extrusion process. For some batteries with a large height, the battery tilts after the extrusion begins, which cannot meet the test requirements. In addition, for the two extrusion tests along the axial and radial directions of the battery, two independent tooling sets are usually required, which has low applicability. Utility Model Content

[0005] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides an extrusion test fixture for cylindrical batteries. The utility model realizes the installation of cylindrical batteries on the carrier in different postures by providing a carrier plate and two clamping components that can be assembled on the carrier plate, thereby facilitating axial extrusion testing or radial extrusion testing of the battery, and has high applicability.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model discloses an extrusion test fixture for cylindrical batteries, comprising a carrier plate and a first clamping assembly and a second clamping assembly detachably mounted on the carrier plate. When the first clamping assembly is mounted on the carrier plate, a first clamping area is formed, which is used to fix the cylindrical battery and make the axial direction of the cylindrical battery perpendicular to the pressure surface of the carrier plate. When the second clamping assembly is mounted on the carrier plate, a second clamping area is formed, which is used to fix the cylindrical battery and make the axial direction of the cylindrical battery parallel to the pressure surface of the carrier plate.

[0008] As a further improvement of the above solution, the first clamping assembly includes a first fixed block and a first pressing block. When the first clamping assembly is mounted on the carrier, the first fixed block and the first pressing block are arranged opposite to each other, the first fixed block is fixedly connected to the carrier, and the first pressing block is movably connected to the carrier, so that a first clamping area with adjustable spacing is formed between the first fixed block and the first pressing block.

[0009] As a further improvement of the above solution, a "V"-shaped first groove is provided on the sides of the first fixing block and the first pressing block that are close to each other, and an anti-slip lining is provided on the surface of the first groove.

[0010] As a further improvement of the above solution, the second clamping assembly includes a second fixed block and a second pressing block. When the second clamping assembly is mounted on the carrier, the second fixed block and the second pressing block are arranged opposite to each other, the second fixed block is fixedly connected to the carrier, and the second pressing block is movably connected to the carrier, so that a second clamping area with adjustable spacing is formed between the second fixed block and the second pressing block.

[0011] As a further improvement of the above solution, the second fixing block and the second pressing block are provided with second grooves with arc-shaped cross-sections on their sides close to each other, and the second grooves are used to match the outer edges of the ends of the cylindrical batteries.

[0012] As a further improvement of the above scheme, the extrusion test fixture also includes an elastic clamping device. The elastic clamping device includes a support block, a telescopic rod and an elastic member. The support block is fixedly connected to the carrier plate. One end of the telescopic rod passes through the opening on the support block and is slidably installed with the support block, and the other end is used to be fixed to the second clamping block, so that the distance between the second clamping block and the second fixed block is adjusted by the axial movement of the telescopic rod along the opening. The elastic member is fixed between the other end of the telescopic rod and the support block, and is used to provide a supporting force to the telescopic rod away from the support block.

[0013] As a further improvement of the above solution, a pin hole is further provided on the second pressing block, and a fixing pin capable of plugging and cooperating with the pin hole is provided on the first pressing block.

[0014] As a further improvement of the above solution, the carrier plate is provided with a first mounting hole, a second mounting hole and a third mounting hole arranged in a straight line in sequence. The second fixing block, the first fixing block and the supporting block are screwed with the first mounting hole, the second mounting hole and the third mounting hole respectively by bolts.

[0015] As a further improvement of the above solution, the elastic member is a spring sleeved on the outside of the telescopic rod. The end of the telescopic rod is integrally connected with an anti-dropping block, and the end outer edge projection area of ​​the anti-dropping block is larger than the end outer edge projection area of ​​the opening.

[0016] As a further improvement of the above solution, the end section of the carrier plate is L-shaped, and is integrally formed by a vertical plate and a horizontal plate. The pressure-bearing surface of the carrier plate is arranged on the vertical plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The extrusion test fixture provided by the utility model solves the problem that the cylindrical battery is difficult to be stably fixed during the axial / radial extrusion process. At the same time, the design of the fixture is a detachable structure, and extrusion in different directions can be achieved by replacing accessories. It has high applicability and the same set of fixtures can achieve extrusion in two directions. In addition, the extrusion test fixture can be reused to avoid waste of resources.

[0019] (2) The utility model also adopts a spring clamping structure to avoid excessive clamping force and damage to the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the carrier plate in the embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the extrusion test tooling in the embodiment of the utility model when forming the first clamping area.

[0022] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure of the extrusion test fixture when clamping cylindrical batteries.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the extrusion test tooling in the embodiment of the utility model when forming the second clamping area.

[0024] Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure of the extrusion test fixture when clamping cylindrical batteries.

[0025] In the figure: 10, first clamping assembly; 100, first clamping area; 101, first fixing block; 102, first clamping block; 1010, first groove; 20, second clamping assembly; 200, second clamping area; 201, second fixing block; 202, second clamping block; 2020, second groove; 30, carrier plate; 301, first mounting hole; 302, second mounting hole; 303, third mounting hole; 40, cylindrical battery; 50, elastic clamping device; 501, support block; 5010, opening; 502, telescopic rod; 5021, anti-slip block; 503, elastic member; 6, lining; 7, stopper. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 5 In an embodiment of the utility model, a cylindrical battery extrusion test tool is provided, including a carrier plate 30 and a first clamping assembly 10 and a second clamping assembly 20 detachably mounted on the pressure surface of the carrier plate 30 , and also including an elastic clamping device 50 .

[0028] like Figure 1 As shown, the end cross-section of the carrier plate 30 is "L"-shaped, and is integrally composed of a vertical plate and a horizontal plate. The horizontal plate of the "L"-shaped carrier plate 30 can be installed on a horizontal plane, such as a machine table, a bottom surface, etc.; the vertical plate can be installed on a vertical surface, such as a wall. In this embodiment, the pressure surface of the carrier plate 30 is located on the vertical plate. When performing an extrusion test, the carrier plate 30 is fixed, and the extrusion test equipment is located on one side of the vertical plate, and can be close to or away from the vertical plate, thereby achieving the extrusion of the cylindrical battery 40 on the carrier plate 30. In some embodiments, the extrusion test equipment can use a linear actuator such as a hydraulic cylinder or a pneumatic cylinder to drive the extrusion plate to move, and the cylindrical battery 40 is located between the extrusion plate and the vertical plate and is subjected to extrusion.

[0029] In addition, the carrier 30 is provided with a first mounting hole 301, a second mounting hole 302 and a third mounting hole 303 arranged in a straight line, and each mounting hole can be provided with two symmetrically up and down, which helps to make the installation more stable. In some embodiments, each mounting hole can also be provided with multiple groups arranged in an array along the above straight line direction, so that by adjusting the installation distance, the batteries of different sizes can be clamped and fixed.

[0030] like Figure 2 and Figure 3 As shown, when the first clamping assembly 10 is installed on the carrier 30 , a first clamping area 100 is formed for fixing the cylindrical battery 40 and making the axial direction of the cylindrical battery 40 perpendicular to the pressure surface of the carrier 30 .

[0031] The first clamping assembly 10 includes a first fixing block 101 and a first pressing block 102. When the first clamping assembly 10 is mounted on the carrier 30, the first fixing block 101 and the first pressing block 102 are arranged opposite to each other. The first fixing block 101 is fixedly connected to the second mounting hole 302 on the carrier 30 by bolts, and the first pressing block 102 is movably connected to the carrier 30, so that a first clamping area 100 with adjustable spacing is formed between the first fixing block 101 and the first pressing block 102.

[0032] The first fixing block 101 and the first pressing block 102 are provided with a "V"-shaped first groove 1010 on the sides close to each other, and the first clamping area 100 formed between the two is in a "<>" shape, which is conducive to clamping the curved surface of the side of the cylindrical battery 40 and can adapt to cylindrical batteries 40 of different diameters. The surface of the first groove 1010 is provided with an anti-slip lining 6. When the cylindrical battery 40 is fixed, the lining 6 is slightly squeezed and deformed, which can fill the gap between the cylindrical battery 40 and the first groove 1010, and firmly fix the cylindrical battery 40 to prevent the cylindrical battery 40 from deflecting or falling off during the axial compression test.

[0033] In some embodiments, the opening size and opening angle of the first groove 1010 can be determined according to the applicable scope of the extrusion test tool (ie, cylindrical batteries 40 of different specifications).

[0034] When the second clamping assembly 20 is installed on the carrier 30, a second clamping area 200 is formed, which is used to fix the cylindrical battery 40 and make the axial direction of the cylindrical battery 40 parallel to the pressure surface of the carrier 30. The second clamping assembly 20 includes a second fixing block 201 and a second pressing block 202. When the second clamping assembly 20 is installed on the carrier 30, the second fixing block 201 and the second pressing block 202 are arranged opposite to each other, the second fixing block 201 is fixedly connected to the first mounting hole 301 on the carrier 30, and the second pressing block 202 is movably connected to the carrier 30, so as to form a second clamping area 200 with adjustable spacing between the second fixing block 201 and the second pressing block 202.

[0035] The second fixing block 201 and the second pressing block 202 are provided with a second groove 2020 with an arc-shaped cross section on the sides close to each other, and the second groove 2020 is used to match the outer edge of the end of the cylindrical battery 40. In some embodiments, the arc diameter of the second groove 2020 can also be set according to the diameter of the cylindrical battery 40, and when the cylindrical battery 40 is clamped, the cylindrical battery 40 can be matched with it.

[0036] The elastic clamping device 50 includes a support block 501, a telescopic rod 502 and an elastic member 503. The support block 501 is fixedly connected to the third mounting hole 303 on the carrier plate 30 by bolts. One end of the telescopic rod 502 passes through the opening 5010 on the support block 501 and is slidably mounted on the support block 501, and the other end is used to be fixed to the second clamping block 202, so that the distance between the second clamping block 202 and the second fixed block 201 is adjusted by the axial movement of the telescopic rod 502 along the opening 5010. The elastic member 503 is fixed between the other end of the telescopic rod 502 and the support block 501, and is used to provide a supporting force for the telescopic rod 502 to be away from the support block 501.

[0037] In addition, the elastic member 503 is a spring sleeved on the outside of the telescopic rod 502. The end of the telescopic rod 502 is integrally connected with an anti-dropping block 5021, and the end outer edge projection area of ​​the anti-dropping block 5021 is larger than the end outer edge projection area of ​​the opening 5010. At the same time, a stopper 7 can also be fixedly connected to the carrier plate 30, and the stopper 7 is located between the second pressing block 202 and the support block 501, so as to limit the maximum range of motion of the second pressing block 202.

[0038] By means of the elastic pressing device 50 , the second pressing block 202 always tends to move away from the supporting block 501 , thereby providing a stable clamping force for the two clamping assemblies.

[0039] In this embodiment, a pin hole is also provided on the second clamping block 202, and a fixing pin that can be plugged into and matched with the pin hole is provided on the first clamping block 102. In the present utility model, the second clamping block 202 can move with the first clamping block 102. In other words, during the use / idle process of the extrusion test tooling, the second clamping block 202 and the elastic clamping device 50 can be always installed on the carrier plate 30. For different extrusion tests, only the following two distinctions need to be made:

[0040] (1) When the cylindrical battery 40 needs to be subjected to an axial compression test, the first fixing block 101 is installed on the second mounting hole 302 on the carrier 30 , and the second fixing block 201 is removed and separated from the carrier 30 .

[0041] (2) When the cylindrical battery 40 needs to be subjected to a radial compression test, the second fixing block 201 is installed on the first mounting hole 301 on the carrier 30 , and the first fixing block 101 is removed and separated from the carrier 30 .

[0042] The extrusion test fixture provided by the utility model solves the problem that the cylindrical battery is difficult to be stably fixed during the axial / radial extrusion process. At the same time, the design of the fixture is a detachable structure, and extrusion in different directions can be achieved by replacing accessories. It has a wide range of applicability, and the same set of fixtures can achieve extrusion in two directions. In addition, the extrusion test fixture can be reused to avoid waste of resources.

[0043] The utility model also adopts a spring compression structure to avoid excessive clamping force and damage to the battery. The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical solution and utility model concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. A cylindrical battery extrusion test tool, characterized in that: The invention comprises a carrier plate (30), and a first clamping assembly (10) and a second clamping assembly (20) which are detachably mounted on the carrier plate (30); when the first clamping assembly (10) is mounted on the carrier plate (30), a first clamping area (100) is formed for fixing a cylindrical battery (40) and making the axial direction of the cylindrical battery (40) perpendicular to the pressure surface of the carrier plate (30); when the second clamping assembly (20) is mounted on the carrier plate (30), a second clamping area (200) is formed for fixing the cylindrical battery (40) and making the axial direction of the cylindrical battery (40) parallel to the pressure surface of the carrier plate (30).

2. The cylindrical battery extrusion test fixture according to claim 1, characterized in that: The first clamping assembly (10) comprises a first fixed block (101) and a first pressing block (102); when the first clamping assembly (10) is mounted on a carrier plate (30), the first fixed block (101) and the first pressing block (102) are arranged relative to each other, the first fixed block (101) is fixedly connected to the carrier plate (30), and the first pressing block (102) is movably connected to the carrier plate (30), thereby forming a first clamping area (100) with an adjustable spacing between the first fixed block (101) and the first pressing block (102).

3. The cylindrical battery extrusion test fixture according to claim 2, characterized in that: A "V"-shaped first groove (1010) is provided on the side surfaces of the first fixing block (101) and the first pressing block (102) that are close to each other, and an anti-slip lining (6) is provided on the surface of the first groove (1010).

4. The cylindrical battery extrusion test tool according to claim 2, characterized in that: The second clamping assembly (20) comprises a second fixed block (201) and a second pressing block (202); when the second clamping assembly (20) is mounted on the carrier plate (30), the second fixed block (201) and the second pressing block (202) are arranged relative to each other, the second fixed block (201) is fixedly connected to the carrier plate (30), and the second pressing block (202) is movably connected to the carrier plate (30), thereby forming a second clamping area (200) with an adjustable spacing between the second fixed block (201) and the second pressing block (202).

5. The cylindrical battery extrusion test fixture according to claim 4, characterized in that: The sides of the second fixing block (201) and the second pressing block (202) that are close to each other are both provided with a second groove (2020) with a circular arc cross section, and the second groove (2020) is used to match the outer edge of the end of the cylindrical battery (40).

6. The cylindrical battery extrusion test tool according to claim 4 or 5, characterized in that: It also includes an elastic clamping device (50); the elastic clamping device (50) includes a support block (501), a telescopic rod (502) and an elastic member (503); the support block (501) is fixedly connected to the carrier plate (30); one end of the telescopic rod (502) passes through an opening (5010) on the support block (501) and is slidably mounted with the support block (501), and the other end is used to be fixed to the second clamping block (202), so that the distance between the second clamping block (202) and the second fixed block (201) can be adjusted by the axial movement of the telescopic rod (502) along the opening (5010); The elastic member (503) is fixed between the other end of the telescopic rod (502) and the support block (501), and is used to provide a supporting force for the telescopic rod (502) to move away from the support block (501).

7. The cylindrical battery extrusion test fixture according to claim 6, characterized in that: The second pressing block (202) is also provided with a pin hole, and the first pressing block (102) is provided with a fixing pin that can be plugged into and matched with the pin hole.

8. The cylindrical battery extrusion test tool according to claim 6, characterized in that: The carrier plate (30) is provided with a first mounting hole (301), a second mounting hole (302) and a third mounting hole (303) arranged in a straight line in sequence; the second fixing block (201), the first fixing block (101) and the supporting block (501) are respectively screwed with the first mounting hole (301), the second mounting hole (302) and the third mounting hole (303) by means of bolts.

9. The cylindrical battery extrusion test fixture according to claim 6, characterized in that: The elastic member (503) is a spring sleeved on the outside of the telescopic rod (502); the end of the telescopic rod (502) is integrally connected with an anti-slip block (5021), and the end outer edge projection area of ​​the anti-slip block (5021) is larger than the end outer edge projection area of ​​the opening (5010).

10. The cylindrical battery extrusion test tool according to claim 1, characterized in that: The end section of the carrier plate (30) is L-shaped and is integrally formed of a vertical plate and a horizontal plate; the pressure-bearing surface of the carrier plate (30) is arranged on the vertical plate.

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