A device for testing the pressure resistance of explosion-proof batteries

Abstract

The present invention provides an explosion-proof battery pressure resistance detection device, comprising a workbench, an explosion-proof box is arranged on the workbench, a clamp is arranged in the explosion-proof box, the clamp is elastic, and a clamp is arranged inside the clamp, the clamp is used to clamp a battery shell, when the air pressure inside the battery shell gradually increases, the battery shell begins to gradually expand and deform, and the clamp deforms along with the battery shell, the battery shell part clamped by the clamp is not fixed, but expands and deforms, thereby avoiding the problem of inaccurate pressure resistance detection of the battery shell caused by the fixed position of the battery shell part clamped by the clamp, and at the same time, the clamping force of the clamp increases with the gradual increase of the air pressure inside, thereby avoiding the phenomenon of the battery shell detaching from the clamp during the detection process.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pressure resistance detection, and in particular to an explosion-proof battery pressure resistance detection device. Background Art

[0002] The compressive capacity testing device is usually used to test the performance and stability of materials, structures or equipment under pressure or load. This device can be used for research and application in engineering, construction, materials science and other fields.

[0003] It is also involved in the field of battery technology, such as testing the pressure resistance of the battery shell. The purpose of testing the pressure resistance of the shell is to ensure that it will not be broken or damaged due to external pressure or collision during normal use, thereby ensuring the safety and stability of the battery. When performing pressure testing on the explosion-proof battery shell, it is usually tested by pumping air into it, but during the test, the circle clamped by the fixture will not deform during the test, which may result in the test data not being the most accurate, and as the air pressure gradually increases, the battery shell is prone to detach from the fixture. Summary of the invention

[0004] Based on this, it is necessary to provide an explosion-proof battery pressure resistance detection device to address the problem that the battery shell is fixed in the clamping position of the current fixture, resulting in inaccurate detection data and the battery shell is easily detached from the fixture.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A device for detecting the compression resistance of an explosion-proof battery, comprising:

[0007] A workbench is provided on the workbench, a clamp is provided in the explosion-proof box, a clamp is provided in the clamp, the clamp is provided with a clamping claw, the clamping claw clamps the middle position of the battery shell, an air inlet is provided on the clamp, when the battery shell is filled with gas, the clamping force of the clamping claw is positively correlated with the gas pressure in the battery shell, and the clamp is elastic.

[0008] Furthermore, the material of the clamp is rubber.

[0009] Furthermore, an airbag and a top block are provided in the clamp, the airbag is arranged around the clamp, the top block is located on the outer peripheral side of the airbag, the top block abuts against the clamp, and the airbag is configured to push the top block when deformed by pressure, and the top block pushes the clamp to change the clamping force of the clamp on the battery casing.

[0010] Furthermore, a push rod is provided in the airbag, one end of which is fixedly provided on the inner circumference of the airbag, and the other end of the push rod extends out of the airbag and is provided with a sliding seal. The end of the push rod extending out of the airbag is fixedly connected to the top block, and when the airbag is deformed, it drives the push rod to push the top block to press the clamp.

[0011] Furthermore, there are two top blocks, which are respectively located on both sides of the clamp to press the clamp, and a pull rod is arranged between the two top blocks, one end of the pull rod is fixedly arranged on the periphery of the airbag, and the other end of the pull rod is fixedly arranged on the top block located on the outside.

[0012] Furthermore, there are multiple pull rods.

[0013] Furthermore, the clamping claw is an elastic metal sheet, and the two ends of the elastic metal sheet are bent so as to be close to each other to clamp the battery housing.

[0014] Furthermore, a clamp is provided at the corner of the clamp, and the clamp includes four clamps and a fixed plate. The four clamps are vertically arranged on the fixed plate, and the four clamps are arranged in pairs of two. The angle between the two clamps in each pair is 90°, and the two pairs of clamps are located at the same corner.

[0015] Furthermore, the air inlet is connected to an air pump, and the air pump inflates air into the battery housing through the air inlet.

[0016] Furthermore, a control element and a display are provided on the workbench, the control element adjusts the inflation volume of the air pump, and the display is used to display air pressure parameters.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides an elastic clamp, and the clamp clamps the middle position of the battery shell. When the air pressure inside the battery shell gradually increases, the battery shell begins to gradually expand and deform, and the clamp deforms with the battery shell. The part of the battery shell clamped by the clamp is not fixed but expands and deforms, thereby avoiding the problem of inaccurate detection of the compressive capacity of the battery shell due to the fixed position of the part of the battery shell clamped by the clamp. At the same time, the clamping force of the clamp increases as the air pressure inside the battery shell gradually increases, thereby avoiding the phenomenon of the battery shell detaching from the clamp during the detection process.

[0019] The present invention provides a clamping piece at the corner of the clamp so that the corner of the battery housing and the corner of the clamp are sealed, thereby avoiding a gap between the two when deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A schematic diagram of the structure of a device for detecting the compression resistance of an explosion-proof battery provided in one embodiment of the present invention;

[0021] Figure 2 A schematic structural diagram of a fixture and a battery housing of an explosion-proof battery compression resistance testing device provided in one embodiment of the present invention;

[0022] Figure 3 for Figure 2 A side view of a fixture and a battery housing of an explosion-proof battery pressure resistance detection device provided in an embodiment;

[0023] Figure 4 for Figure 3 A cross-sectional view of a fixture and a battery housing along AA of an explosion-proof battery compression resistance detection device provided in an embodiment;

[0024] Figure 5 for Figure 2 A right side view of a fixture and a battery housing of an explosion-proof battery compression resistance detection device provided in an embodiment;

[0025] Figure 6 for Figure 5 A cross-sectional view of a fixture and a battery housing along line BB of an explosion-proof battery compression resistance detection device provided in an embodiment;

[0026] Figure 7 for Figure 6 A partial enlarged view of the fixture and battery housing C of the explosion-proof battery pressure resistance detection device provided in the first embodiment;

[0027] Figure 8 for Figure 5 A cross-sectional view of a fixture and a battery housing along DD of an explosion-proof battery pressure resistance detection device provided in an embodiment;

[0028] Fig. 9 for Figure 8 A partial enlarged view of the fixture and battery housing E of the explosion-proof battery pressure resistance detection device provided in the first embodiment;

[0029] Fig.10 A schematic diagram of the structure of a clip of an explosion-proof battery compression resistance detection device provided by an embodiment of the present invention;

[0030] Fig.11 for Fig.10 A front view of a clip of an explosion-proof battery compression resistance detection device provided in an embodiment.

[0031] in:

[0032] 100, workbench; 110, explosion-proof box; 120, battery housing; 130, control element; 140, display;

[0033] 200, fixture; 210, air inlet; 220, clamping claw; 230, air bag; 240, top block; 250, pull rod; 260, push rod;

[0034] 300, clip; 310, clamp; 320, fixing plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Refer to the following Figure 1-Figure 11 To describe an explosion-proof battery pressure resistance detection device provided by the present application.

[0039] A device for testing the compression resistance of explosion-proof batteries, which is suitable for testing the compression resistance of a battery shell 120, comprises a workbench 100, on which an explosion-proof box 110 is arranged, the explosion-proof box 110 is used to hold the battery shell 120 to be tested, and a clamp 200 is arranged in the explosion-proof box 110, the clamp 200 clamps the battery shell 120, when clamping, the battery shell 120 needs to be firstly divided into two parts from the middle, and then the two parts of the battery shell 120 are clamped into a complete battery shell 120 by the clamp 200, and the side wall of the clamp 200 is provided with a The air inlet 210 and the clamp 200 are elastic. When air is taken in through the air inlet 210, the air pressure in the battery shell 120 gradually increases, and the battery shell 120 will gradually expand as the internal air pressure increases. Since the clamp 200 is elastic, the clamp 200 expands as the battery shell 120 expands, so that the battery shell 120 at the clamping point of the clamp 200 can also expand and deform. The internal air pressure gradually increases to a level that the battery shell 120 cannot withstand and thus ruptures, and then stops increasing. The size of the air pressure at this time reflects the pressure resistance of the battery shell 120.

[0040] A clamp 220 is provided in the clamp 200, and the clamp 220 tightly clamps the battery housing 120, and the clamping force of the clamp 220 is positively correlated with the internal gas pressure, that is, the greater the gas pressure inside the battery housing 120, the greater the clamping force of the clamp 220 on the battery housing 120, thereby preventing the clamp 220 from disengaging from the battery housing 120 when the gas pressure in the battery housing 120 has not reached the maximum pressure.

[0041] The present application provides an elastic clamp 200, and the clamp 200 expands as the battery shell 120 expands, thereby avoiding the problem of inaccurate detection of the compressive resistance of the battery shell 120 due to the fixed position of the part of the battery shell 120 clamped by the clamp 200. At the same time, the clamping force of the clamp 200 increases as the air pressure inside the battery shell 120 gradually increases, thereby avoiding the phenomenon of the battery shell 120 detaching from the clamp 200 during the detection process.

[0042] Specifically, the entire material of the clamp 200 of the present application is elastic rubber material, and the air pressure inside the battery housing 120 increases and expands, thereby driving the clamp 200 to expand.

[0043] It should be noted that the material of the clamp 200 is not limited to elastic rubber material, and other elastic materials are also acceptable, and no specific limitation is made here.

[0044] In a further embodiment, the clamp 200 is provided with an airbag 230 and a top block 240. The airbag 230 surrounds the clamp 200. When the air pressure inside the shell increases, a force is generated on the airbag 230, which causes the airbag 230 to be compressed. The top block 240 is arranged on the periphery of the airbag 230, so that the airbag 230 can push the top block 240 when it is compressed. The top block 240 abuts against the clamping jaw 220, and the top block 240 pushes the clamping jaw 220, so that the clamping force of the clamping jaw 220 on the battery shell 120 is increased. When the air pressure inside the battery shell 120 is greater, the degree of compression of the airbag 230 is greater, the airbag 230 pushes the top block 240, and the force of the clamping jaw 220 pushed by the top block 240 is greater, and the force of the clamping jaw 220 clamping the battery shell 120 is greater.

[0045] Specifically, Figure 4 As shown, for the convenience of connection, a push rod 260 is arranged between the top block 240 and the airbag 230. When the airbag 230 is compressed, the push rod 260 is driven to push the top block 240 to push the clamping jaw 220. One end of the push rod 260 is fixedly arranged on the inner peripheral side of the airbag 230, and the other end of the push rod 260 extends out of the airbag 230 and is slidingly sealed. The end is fixedly connected to the top block 240. When the airbag 230 is compressed, the inner peripheral wall of the airbag 230 moves outward, thereby driving the push rod 260 to move synchronously. The push rod 260 pushes the top block 240 to move and then squeezes the clamping jaw 220.

[0046] It should be noted that if Figure 4 As shown, there are two top blocks 240 of the present application, which are respectively located on both sides of the clamping jaw 220. The clamping jaw 220 is an elastic metal sheet. After the elastic metal sheet is bent, the two ends clamp the battery housing 120. The roughness of the two ends is relatively large, which is convenient for clamping the battery housing 120. The two top blocks 240 just abut against the bending part of the clamping jaw 220. A pull rod 250 is arranged between the two top blocks 240. The pull rod 250 is used to connect the two top blocks 240. Since the clamp 200 is elastic, the two top blocks 240 lack support, so the two top blocks 240 need to be connected, wherein, as shown in FIG. Figure 7 As shown, the top block 240 located on the inner side, that is, Figure 7 A slide groove is provided on the top block 240 located at the top, and the pull rod 250 is slidably set in the slide groove. When the two top blocks 240 are close to each other, the pull rod 250 slides in the slide groove, which is convenient for jointly pushing the clamping jaws 220, so that the upper and lower sides of the clamping jaws 220 are pushed, and the clamping force of the clamping jaws 220 on the battery shell 120 is more uniform.

[0047] To facilitate connection, one end of the pull rod 250 is fixedly connected to the outer top block 240, and the other end of the pull rod 250 is fixedly connected to the outer peripheral wall of the airbag 230. When the airbag 230 is compressed, the top and bottom ends of the airbag 230 will approach each other, that is, the outer peripheral wall and the inner peripheral wall of the airbag 230 will approach each other. The top end of the airbag 230 pulls the pull rod 250 and then pulls the outer top block 240 to push the clamping jaw 220. The bottom end of the airbag 230 pushes the push rod 260 and then pushes the inner top block 240 to push the clamping jaw 220. The two top blocks 240 approach each other and thus push the clamping jaw 220 together.

[0048] In a further embodiment, Figure 6 and Figure 7 As shown, there are a plurality of pull rods 250 , which are arranged in pairs, with a pair of pull rods 250 arranged at intervals, so that the top block 240 is evenly stressed.

[0049] In a further embodiment, since the embodiment of the present application is a rectangular clamp 200, clips 300 are provided at the four corners of the clamp 200, that is, at the four right angles of the clamp 200, as shown in FIG. Figure 8 and Fig. 9 As shown, when the clamp 200 and the battery housing 120 expand, gaps are easily generated at the four corners, so the clips 300 are provided at the corners to avoid gaps between the corners of the clamp 200 and the corners of the battery housing 120 .

[0050] Specifically, the structure of the clip 300 is composed of four clamping plates 310 and a fixing plate 320. Fig. 9 , Fig.10 and Fig.11 As shown, four clamping plates 310 are respectively fixed vertically on the fixing plate 320 , and the four clamping plates 310 are arranged in pairs, with an angle of 90° between the two pairs of clamping plates 310 , and the two pairs of clamping plates 310 are located at the same corner.

[0051] Specifically, an air pump (not shown in the figure) is provided on the workbench 100, and the air pump is connected to the air inlet 210 on the fixture 200. The air pump is used to fill gas into the fixture 200 so that the air pressure inside the fixture 200 gradually increases to detect the pressure resistance of the battery housing 120.

[0052] Specifically, the workbench 100 is also provided with a control element 130 and a display 140. The control element 130 is used to adjust the inflation volume of the air pump. It should be noted that the control element 130 is all existing technology. After the control element 130 adjusts the parameters, the detection operation can be started, and the display 140 is used to display various parameters.

[0053] It should be noted that the clamp 200 of the embodiment of the present application is rectangular, and the battery housing 120 is also rectangular. In another embodiment, the clamp 200 can be set to a cylindrical shape, and the internal structure of the clamp 200 can remove the clip 300, and the other structures remain unchanged, so that the pressure resistance of the cylindrical battery housing 120 can be detected. It is only necessary to replace the clamp 200 in the explosion-proof box 110, which greatly improves the scope of application of the explosion-proof battery pressure resistance detection device.

[0054] The specific working process of the explosion-proof battery pressure resistance detection device provided by the present application is described in combination with the above embodiments:

[0055] Installation of battery housing 120:

[0056] The battery housing 120 to be inspected is divided into two parts from the middle position, and the two parts of the battery housing 120 are mounted on the clamp 200 so that the clamping jaws 220 clamp the battery housing 120 .

[0057] When the air pump is not working, the distance between the clamping jaws 220 is just the thickness of the battery housing 120, which is convenient for the installation of the battery housing 120. The parameters of the control element 130 are adjusted so that when the air pump starts to work, the air pressure in the battery housing 120 gradually increases, the air bag 230 is gradually compressed by the gas, the inner wall and the outer wall of the air bag 230 approach each other, the inner wall drives the push rod 260 to push the inner top block 240, and the outer wall drives the pull rod 250 to pull the outer top block 240, so that the two top blocks 240 approach each other to push the clamping jaws 220. Thereby, the clamping jaws 220 clamp the battery housing 120. As the air pressure inside the battery housing 120 gradually increases, the compression degree of the airbag 230 increases, thereby increasing the force of the push rod 260 and the pull rod 250 on the two top blocks 240. The two top blocks 240 act on the upper and lower sides of the clamping jaws 220 to increase the clamping force of the battery housing 120, so that the clamping force of the clamping jaws 220 on the battery housing 120 increases as the internal air pressure gradually increases, thereby preventing the battery housing 120 from escaping from the clamping jaws 220.

[0058] Data detection:

[0059] When the air pressure inside the battery shell 120 increases to the maximum limit that the battery shell 120 can withstand, the battery shell 120 ruptures and the air pump stops pumping air. At this time, the air pressure data on the display 140 is the maximum air pressure that the battery shell 120 can withstand, thereby reflecting the pressure resistance of the battery shell 120.

[0060] Disassembly of the battery housing 120:

[0061] After the battery shell 120 is ruptured, the airbag 230 is no longer compressed by the gas, and the airbag 230 returns to its initial state, so that the clamping jaws 220 also return to their initial state, making it convenient to remove the battery shell 120 from the clamp 200 after inspection.

[0062] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A device for detecting the compression resistance of explosion-proof batteries, characterized in that: include: A workbench, wherein an explosion-proof box is arranged on the workbench, a fixture is arranged in the explosion-proof box, a clamp is arranged in the clamp, the clamp clamps the middle position of the battery shell, an air inlet is opened on the clamp, when the battery shell is filled with gas, the clamping force of the clamp is positively correlated with the gas pressure in the battery shell, the clamp is elastic, the material of the clamp is rubber, an air bag and a top block are arranged in the clamp, the air bag is arranged in the clamp around, the top block is located on the outer peripheral side of the air bag, the top block abuts against the clamp, the air bag is configured to push the top block when it is deformed by pressure, and the top block pushes the clamp to change the clamp's contact with the battery shell The clamping force of the body, the clamping claw is an elastic metal sheet, and the two ends of the elastic metal sheet are close to each other after being bent to clamp the battery shell, a push rod is arranged in the airbag, one end of the push rod is fixedly arranged on the inner periphery of the airbag, the other end of the push rod extends out of the airbag and is slidingly sealed, one end of the push rod extending out of the airbag is fixedly connected to the top block, and when the airbag is deformed, it drives the push rod to push the top block to press the clamping claw, there are two top blocks, which are respectively located on both sides of the clamping claw to press the clamping claw, and a pull rod is arranged between the two top blocks, one end of the pull rod is fixedly arranged on the outer periphery of the airbag, and the other end of the pull rod is fixedly arranged on the top block located on the outside.

2. The explosion-proof battery pressure resistance detection device according to claim 1, characterized in that: There are multiple pull rods.

3. The explosion-proof battery pressure resistance detection device according to claim 1, characterized in that: A clamp is provided at the corner of the clamp, and the clamp includes four clamps and a fixed plate. The four clamps are vertically arranged on the fixed plate, and the four clamps are arranged in pairs of two. The angle between the two clamps in each pair is 90°, and the two pairs of clamps are located at the same corner.

4. The explosion-proof battery pressure resistance detection device according to claim 1, characterized in that: The air inlet is connected to an air pump, and the air pump inflates air into the battery housing through the air inlet.

5. The explosion-proof battery pressure resistance detection device according to claim 4, characterized in that: The workbench is provided with a control element and a display, the control element adjusts the inflation volume of the inflation pump, and the display is used to display air pressure parameters.

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