Burst pressure test fixture
By designing a blasting pressure test fixture with movable clamps and bottom plates, the problem of low versatility of test fixtures in the prior art is solved, and adaptability and ease of operation are achieved for battery covers of different sizes.
Patent Information
- Application Number
- CN202421741200.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In the prior art, the explosion-proof valve is welded and fixed on the battery cover plate, resulting in low versatility of the test fixtures and unable to adapt to different sizes of the battery cover plates. It is necessary to customize the fixtures separately and adjust the test parameters, which is costly and less operable.
A blasting pressure testing fixture is designed including a base assembly and a cap assembly. The base assembly includes a movable clamp and a base plate, a V-shaped fixing groove is provided on the clamp, and a guide groove is provided on the bottom plate, and the clamp can be moved along the guide groove to accommodate battery covers of different sizes.
The fixation of battery covers of different sizes is achieved, the versatility of test fixtures is improved, and the customization cost and operational complexity is reduced.
Smart Images
Figure CN222979322U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery detection equipment, and particularly relates to a bursting pressure test fixture. Background Art
[0002] An explosion-proof valve is an important safety protection structure in a battery system. It is fixedly arranged on a battery cover plate to directionally discharge gas to balance the pressure inside and outside the battery. In the prior art, the explosion-proof valve is welded and fixed on the battery cover plate. When detecting the bursting pressure of the explosion-proof valve, the test fixture clamps the battery cover plate, and the detection equipment is connected to the explosion-proof valve to pressurize the explosion-proof valve for detection. For batteries with different capacities, the sizes of the battery cases are also different. In actual detection, the versatility of the test fixture is relatively low, and it cannot fix battery cover plates of different sizes. It is necessary to customize the fixture separately and adjust the test parameters additionally, resulting in high costs and low operability. Content of the Utility Model
[0003] The purpose of the utility model is to propose a bursting pressure test fixture for the deficiencies of the above-mentioned prior art, which can adapt to battery cover plates of different sizes and fix the battery cover plate on a bottom plate for explosion-proof detection.
[0004] The utility model proposes a bursting pressure test fixture, which includes a base assembly and a pressing cover assembly. The base assembly includes a bottom plate and clamping members. A receiving groove for placing the battery cover plate is arranged on the bottom plate. The two clamping members are oppositely arranged on both sides of the receiving groove, and the clamping members can move relative to the bottom plate until they abut against the side edges of the battery cover plate. A through channel is arranged on the pressing cover assembly, and the pressing cover assembly is covered on the battery cover plate. The channel corresponds to the explosion-proof valve on the battery cover plate, and gas is introduced into the channel to pressurize the explosion-proof valve.
[0005] A preferred technical solution of the utility model: The end of the clamping member facing the receiving groove is provided with a V-shaped fixing groove, and the clamping member fixes the battery cover plate through the fixing groove, and both side walls of the fixing groove contact the battery cover plate.
[0006] A preferred technical solution of the utility model: A guiding groove is arranged on the bottom plate, a convex platform is arranged at the bottom of the clamping member, and the convex platform is inserted into the guiding groove, and the clamping member moves along the guiding groove.
[0007] A preferred technical solution of the utility model: A waist-shaped counterbore is arranged on the clamping member, the waist-shaped counterbore is parallel to the guiding groove, a fixing hole is arranged on the bottom plate, and a fixing member is arranged on the clamping member. The fixing member penetrates through the waist-shaped counterbore and is inserted into the fixing hole to fix the bottom plate and the clamping member.
[0008] A preferred technical solution of the present utility model: Two positioning columns are provided on the bottom plate, and two positioning holes are provided on the gland assembly. When the gland assembly is covered on the bottom plate, the two positioning columns are respectively inserted into the two positioning holes.
[0009] A preferred technical solution of the present utility model: The top of the positioning column is provided with an external thread, and a limit nut is provided on the positioning column. The limit nut presses the gland assembly on the bottom plate.
[0010] A preferred technical solution of the present utility model: The gland assembly includes a cover plate, a pressure gauge and an air pipe joint. The channel is perpendicular to the cover plate, and the air pipe joint communicates with the channel and is externally connected to a gas source.
[0011] A preferred technical solution of the present utility model: A sealing groove is provided at the bottom of the cover plate. The sealing groove is arranged on the outer periphery of the channel, and a sealing ring is provided on the sealing groove.
[0012] A preferred technical solution of the present utility model: The pressure gauge is arranged on the side of the cover plate, and the end of the pressure gauge communicates with the channel.
[0013] The blasting pressure test fixture of the present utility model has the following beneficial effects:
[0014] 1. The clamping member is movably arranged on the bottom plate. For battery cover plates of different sizes, the clamping member is moved to clamp, and the battery cover plate and the explosion-proof valve thereon are fixed on the bottom plate.
[0015] 2. The clamping member is provided with a V-shaped fixing groove. The two side walls of the V-shaped fixing groove can better clamp the battery cover plate, and have a better fixing effect.
[0016] 3. A guiding groove is provided on the bottom plate to guide the movement of the clamping member. The clamping member can move along the guiding groove to abut against the outer periphery of the battery cover plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model. In these drawings, like reference numerals are used to represent like elements. The following drawings are some embodiments of the present utility model, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 It is an installation schematic diagram of an embodiment of the present utility model.
[0019] Figure 2 It is a structural schematic diagram when the base assembly of the embodiment of the present utility model fixes the battery cover plate.
[0020] Figure 3 This is a schematic structural view of the base assembly according to an embodiment of the present utility model.
[0021] Figure 4 This is a cross-sectional view of an embodiment of the present utility model.
[0022] Figure 5 This is an enlarged view of part A in an embodiment of the present utility model Figure 4 in the embodiment of the present utility model.
[0023] In the figure: 10, base assembly; 11, bottom plate; 111, accommodating groove; 112, guiding groove; 12, clamping member; 121, boss; 122, kidney-shaped counterbore; 123, overlapping edge; 124, fixing member; 125, fixing groove; 13, positioning post; 131, limiting nut; 20, battery cover plate; 21, explosion-proof valve; 30, gland assembly; 31, cover plate; 311, sealing groove; 312, channel; 32, pressure gauge; 33, air pipe joint; 34, sealing ring. Specific embodiments
[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other arbitrarily.
[0025] Please refer to Figures 1 to 5. A bursting pressure test fixture includes a base assembly 10 and a gland assembly 30. The battery cover plate 20 is clamped between the base assembly 10 and the gland assembly 30 to perform a bursting test on the explosion-proof valve 21 on the battery cover plate 20. The base assembly 10 includes a bottom plate 11 and clamping members 12. A receiving groove 111 for receiving the battery cover plate 20 is provided on the bottom plate 11. The two clamping members 12 are respectively arranged on both sides of the receiving groove 111. The clamping members 12 can move relative to the bottom plate 11 until they abut against the side edges of the battery cover plate 20 to clamp battery cover plates 20 of different sizes. The gland assembly 30 includes a cover plate 31, an air pipe joint 33 and a pressure gauge 32. A channel 312 is provided on the cover plate 31. Both the air pipe joint 33 and the pressure gauge 32 are communicated with the channel 312. The cover plate 31 is covered on the bottom plate 11. The battery cover plate 20 is clamped between the bottom plate 11 and the cover plate 31. The channel 312 is arranged corresponding to the explosion-proof valve 21 on the battery cover plate 20. An external air source passes gas into the channel 312 through the air pipe joint 33, and the pressure gauge 32 detects the bursting pressure value of the explosion-proof valve 21.
[0026] Considering that the battery cover plate 20 used on the battery is usually circular, to improve the clamping stability of the clamping member 12 on the battery cover plate 20, a V-shaped fixing groove 125 is provided at one end of the clamping member 12 facing the receiving groove 111. The two inclined side walls of the fixing groove 125 face the receiving groove 111. The fixing grooves 125 of the two clamping members 12 are arranged oppositely, as Figure 2 and Figure 3 shown. When the clamping member 12 clamps the battery cover plate 20, both inclined side walls of the fixing groove 125 are in contact with the outer circumference of the battery cover plate 20. There are two symmetrical contact surfaces between a single clamping member 12 and the battery cover plate 20. The two clamping members 12 are arranged on both sides of the battery cover plate 20. There are four contact surfaces between the two clamping members 12 and the battery cover plate 20, thereby increasing the clamping stability of the clamping member 12 on the battery cover plate 20 and preventing the battery cover plate 20 from moving on the bottom plate 11 during the pressure detection process.
[0027] In this embodiment, the receiving groove 111 is arranged in the middle of the bottom plate 11 and penetrates the bottom plate 11. A lapping edge 123 is provided at the bottom of the fixing groove 125. The battery cover plate 20 is placed on the lapping edge 123. The lapping edge 123 provides support for the periphery of the battery cover plate 20 below it. The receiving groove 111 is located below the battery cover plate 20 to form a cavity below the battery cover plate 20 for facilitating pressure detection.
[0028] As another embodiment, the receiving groove 111 is a trapezoidal groove and penetrates through the bottom plate 11. The receiving groove 111 forms two circular grooves on the top surface and the bottom surface of the bottom plate 11 respectively. The size of the circular groove formed by the receiving groove 111 on the top surface of the bottom plate 11 is larger than that of the circular groove formed on the bottom surface of the bottom plate 11, and the radial dimension of the top circular groove is larger than the radial dimension of the conventional battery cover plate 20, and the depth of the top circular groove is less than the thickness of the conventional battery cover plate 20. So that when the battery cover plate 20 is placed in the top circular groove, the battery cover plate 20 protrudes from the top surface of the bottom plate 11. After the clamping member 12 located on the bottom plate 11 moves, it can abut against the circumferential surface of the battery cover plate 20, thereby fixing the battery cover plate 20 in the receiving groove 111.
[0029] Further, a guiding groove 112 is also provided on the top surface of the bottom plate 11. A boss 121 is provided at the bottom of the clamping member 12, and the boss 121 is inserted into the guiding groove 112. The guiding groove 112 provides guidance for the movement of the clamping member 12. The guiding groove 112 extends along the radial direction of the receiving groove 111. When the clamping member 12 moves along the guiding groove 112, the movement path of the corner end of the V-shaped fixing groove 125 is collinear with the radial direction of the receiving groove 111, so that both side walls of the fixing groove 125 can abut against the outer circumference of the battery cover plate 20, and the two clamping members 12 cooperate to stably fix the battery cover plate 20.
[0030] A kidney-shaped counterbore 122 is provided on the clamping member 12, and a fixing hole is provided on the bottom plate 11. The length direction of the kidney-shaped counterbore 122 is parallel to the length direction of the guiding groove 112. When the clamping member 12 moves to make the fixing groove 125 abut against the outer circumference of the battery cover plate 20, a fixing member 124 is inserted into the fixing hole. The fixing member 124 penetrates through the kidney-shaped counterbore 122 and connects to the fixing hole, fixing the clamping plate on the bottom plate 11, and further restricting the position of the battery cover plate 20 to fix the battery cover plate 20. In this embodiment, the fixing hole is a threaded hole, the fixing member 124 is a bolt, and when the fixing member 124 connects the clamping member 12 and the bottom plate 11, its head is located in the kidney-shaped counterbore 122.
[0031] The gland assembly 30 includes a cover plate 31, a pressure gauge 32 and a gas pipe joint 33. The cover plate 31 is covered on the battery cover plate 20, and the battery cover plate 20 is fixed between the bottom plate 11 and the cover plate 31 for pressure detection.
[0032] Positioning columns 13 are provided on the bottom plate 11. Correspondingly, positioning holes are provided on the cover plate 31. When the cover plate 31 is covered on the bottom plate 11, the positioning columns 13 pass through the positioning holes to limit the lateral displacement of the cover plate 31. External threads are provided at the upper ends of the positioning columns 13. After the cover plate 31 is covered on the battery cover plate 20, a limit nut 131 is installed on the positioning columns 13. The limit nut 131 restricts the longitudinal displacement of the cover plate 31, fixes the cover plate 31, and fixes the battery cover plate 20 between the bottom plate 11 and the cover plate 31.
[0033] Please refer toFigure 4 and Figure 5 , the channel 312 is perpendicular to the cover plate 31 and penetrates through the cover plate 31. The channel 312 forms holes on the top and bottom surfaces of the cover plate 31 respectively. A sealing groove 311 is provided on the bottom surface of the cover plate 31. The sealing groove 311 is arranged around the channel 312. A sealing ring 34 is arranged in the sealing groove 311. When the cover plate 31 is covered on the battery cover plate 20, the sealing ring 34 is extruded by the cover plate 31 and wound around the outer periphery of the explosion-proof valve 21 to improve the sealing performance. One end of the air pipe joint 33 is connected to the channel 312, and the other end is connected to an external air source. The pressure gauge 32 is arranged on the side of the cover plate 31, and the pressure gauge 32 communicates with the channel 312. Gas is introduced into the channel 312 through the air pipe joint 33 to pressurize the explosion-proof valve 21.
[0034] During the detection, place the battery cover plate 20 on the overlapping edge 123 of the clamping member 12, move the clamping member 12 so that the two side walls of the fixing groove 125 are in contact with the outside of the battery cover plate 20. Move the two clamping members 12 and the battery cover plate 20 integrally so that the battery cover plate 20 is located above the accommodating groove 111. Insert the positioning column 13 into the positioning hole to position the cover plate 31 and the bottom plate 11. Rotate the battery cover plate 20 so that the explosion-proof valve 21 corresponds to the channel 312 on the cover plate 31. After determining the position, fix the clamping member 12 on the bottom plate 11 through the fixing member 124 to complete the fixation of the battery cover plate 20, and set a limit nut 131 on the positioning column 13 to fix the battery cover plate 20 between the bottom plate 11 and the cover plate 31. Introduce gas into the sealing groove 311 through the air pipe joint 33 to pressurize the explosion-proof valve 21 for detection, and read the bursting pressure value of the explosion-proof valve 21 through the pressure gauge 32.
[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A bursting pressure test fixture, characterized in that: The invention comprises a base assembly (10) and a pressure cover assembly (30), wherein the base assembly (10) comprises a bottom plate (11) and a clamping member (12), wherein the bottom plate (11) is provided with a receiving groove (111) for receiving a battery cover (20), and two clamping members (12) are arranged on opposite sides of the receiving groove (111), and the clamping members (12) can be moved relative to the bottom plate (11) until they abut against the side of the battery cover (20); and the pressure cover assembly (30) is provided with a through channel (312), wherein the pressure cover assembly (30) is covered on the battery cover (20), and the channel (312) is arranged corresponding to the explosion-proof valve (21) on the battery cover (20), and gas is introduced into the channel (312) to pressurize the explosion-proof valve (21).
2. A bursting pressure test fixture according to claim 1, characterized in that: A V-shaped fixing groove (125) is provided at one end of the clamping member (12) facing the accommodating groove (111), and the clamping member (12) fixes the battery cover plate (20) via the fixing groove (125), and two side walls of the fixing groove (125) contact the battery cover plate (20).
3. A bursting pressure test fixture according to claim 2, characterized in that: A guide groove (112) is provided on the bottom plate (11), a boss (121) is provided at the bottom of the clamping member (12), the boss (121) is inserted into the guide groove (112), and the clamping member (12) moves along the guide groove (112).
4. A bursting pressure test fixture according to claim 3, characterized in that: The clamping member (12) is provided with a waist-shaped countersunk hole (122), the waist-shaped countersunk hole (122) is parallel to the guide groove (112), the bottom plate (11) is provided with a fixing hole, the clamping member (12) is provided with a fixing member (124), the fixing member (124) passes through the waist-shaped countersunk hole (122) and is inserted into the fixing hole to fix the bottom plate (11) and the clamping member (12).
5. A bursting pressure test fixture according to claim 1, characterized in that: Two positioning columns (13) are provided on the bottom plate (11), and two positioning holes are provided on the cover assembly (30); when the cover assembly (30) is covered on the bottom plate (11), the two positioning columns (13) are respectively inserted into the two positioning holes.
6. A bursting pressure test fixture according to claim 5, characterized in that: The top of the positioning column (13) is provided with an external thread, and a limiting nut (131) is provided on the positioning column (13), and the limiting nut (131) presses the gland assembly (30) onto the bottom plate (11).
7. A bursting pressure test fixture according to claim 1, characterized in that: The gland assembly (30) comprises a cover plate (31), a pressure gauge (32) and an air pipe joint (33); the channel (312) is arranged perpendicular to the cover plate (31); and the air pipe joint (33) is in communication with the channel (312) and is connected to an external air source.
8. A bursting pressure test fixture according to claim 7, characterized in that: A sealing groove (311) is provided at the bottom of the cover plate (31), the sealing groove (311) is provided on the outer periphery of the channel (312), and a sealing ring (34) is provided on the sealing groove (311).
9. A bursting pressure test fixture according to claim 8, characterized in that: The pressure gauge (32) is arranged on a side of the cover plate (31), and an end of the pressure gauge (32) is connected to the channel (312).