A limiting tool for assisting in functional detection of an explosion-proof valve at the bottom of an aluminum shell

Abstract

The utility model relates to aluminium shell bottom explosion -proof valve detection device technical field, especially a kind of for the functional detection of limit tool for assisting aluminium shell bottom explosion -proof valve, including bottom plate, the top of the bottom plate is fixed with an intermediate body for shell cover, the top of the bottom plate is fixed with locating block in the front and back both sides of intermediate body, the top of the locating block has pin, the upper portion of the intermediate body is provided with upper cover, the bottom of the upper cover has the pin hole for pin passing through.The utility model can limit aluminium shell, it is convenient for subsequent functional detection of explosion -proof valve in the bottom of aluminium shell.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum shell bottom explosion-proof valve testing device, and in particular to a limiting tooling for assisting in the functional testing of aluminum shell bottom explosion-proof valves. Background Technology

[0002] In traditional power battery cells, the explosion-proof valve and terminal post are on the same side (generally, when the cell is upright, the explosion-proof valve and terminal post are on top), and when assembled into a module, a high-voltage line is connected at the top. When a cell experiences thermal runaway, the high-pressure ejected material generated by the chemical reaction inside the cell is discharged upwards through the explosion-proof valve, which may cause a short circuit or damage to the high-voltage line, leading to thermal management failure of the module or even the entire battery pack, resulting in further damage to the power battery pack and affecting the safety of passengers in the vehicle.

[0003] To comprehensively improve the safety performance and thermal management efficiency of the battery pack, an explosion-proof valve is designed at the bottom of the battery cell (i.e., the aluminum casing) (generally, when the battery cell is upright, the explosion-proof valve is at the bottom, and the terminals and high-voltage lines are at the top). In the event of thermal runaway in the battery cell, the high-pressure ejected material is directed downwards, effectively preventing it from affecting the high-voltage lines above. This suppresses the spread of thermal runaway and reduces the further hazards caused by thermal runaway that could affect the passenger compartment.

[0004] This application provides a limiting fixture for assisting in the functional testing of the explosion-proof valve at the bottom of the aluminum shell. It can limit the movement of the aluminum shell, facilitating subsequent functional testing of the explosion-proof valve at the bottom of the aluminum shell. Utility Model Content

[0005] The purpose of this invention is to provide a limiting fixture for assisting in the functional testing of the explosion-proof valve at the bottom of an aluminum shell, which can limit the movement of the aluminum shell.

[0006] The technical solution of this utility model:

[0007] A limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell includes a base plate. An intermediate body for housing fitting is fixed to the top of the base plate. Positioning blocks are fixed to the front and rear sides of the intermediate body on the top of the base plate. The top of the positioning blocks has pins. An upper cover is provided above the intermediate body. The bottom of the upper cover has pin holes for the pins to pass through.

[0008] Furthermore, the top of the base plate is fixed with limit blocks on both the left and right sides of the intermediate body.

[0009] Furthermore, the base plate has a first conveying cavity, and a first air pipe communicating with the first conveying cavity is fixed to one side of the base plate; the top of the base plate has an air outlet communicating with the first conveying cavity; the bottom of the intermediate body has an air supply channel communicating with the air outlet, and the upper end of the air supply channel extends to the top of the intermediate body.

[0010] Furthermore, a first placement groove is provided on the top of the base plate on the outer periphery of the air outlet, and a first sealing ring is provided in the first placement groove.

[0011] Furthermore, the top of the intermediate body has a first clearance area.

[0012] Furthermore, a second placement groove is provided on the top of the intermediate body on the outer periphery of the first clearance area, and a second sealing ring is provided in the second placement groove.

[0013] Furthermore, the bottom of the upper cover has a second air-proof area, and a second air pipe communicating with the second air-proof area is fixed to one side of the upper cover.

[0014] Furthermore, a third placement groove is provided on the bottom of the upper cover on the outer periphery of the second clearance area, and a third sealing ring is provided in the third placement groove.

[0015] The beneficial effects of this utility model are:

[0016] (1) Place the shell on the intermediate body, and then place the top cover on the shell so that the pin is embedded in the pin hole, thereby limiting the shell.

[0017] (2) When the shell is fitted onto the intermediate body, the left and right sides of the shell contact the inner sides of the two limiting blocks respectively, so that the shell can be better limited.

[0018] (3) This utility model can perform helium detection and explosion test on the bottom explosion-proof valve of aluminum shell.

[0019] This invention can limit the movement of the aluminum shell, which facilitates subsequent functional testing of the explosion-proof valve at the bottom of the aluminum shell. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a structural diagram of the top cover (racetrack type).

[0022] Figure 3 This is a structural schematic diagram of the present invention (without the top cover and shell).

[0023] Figure 4 This is a structural diagram of the base plate.

[0024] Figure 5 This is a structural diagram of the intermediate.

[0025] Figure 6 This is a structural diagram of an explosion-proof valve (I-shaped).

[0026] Figure 7 This is a structural diagram of an explosion-proof valve (racetrack type).

[0027] Figure 8 This is a schematic diagram of the top cover (rounded rectangle).

[0028] Figure 9 This is a schematic diagram of the clamping device.

[0029] In the diagram: base plate 1, shell 2, explosion-proof valve 21, intermediate body 3, positioning block 4, pin 5, top cover 6, pin hole 7, limiting block 8, first air pipe 9, air outlet 10, air supply channel 11, first sealing ring 12, first clearance area 13, second sealing ring 14, second clearance area 15, second air pipe 16, third sealing ring 17, clamping device 18, base 19, guide shaft 20, bushing 21, pressure plate 22, cylinder 23, top plate 24. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] like Figures 1-9 As shown, this utility model provides a first embodiment of a limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell. It includes a base plate 1, with an intermediate body 3 fixed to the top of the base plate 1 for mounting a shell 2. Positioning blocks 4 are fixed to both the front and rear sides of the intermediate body 3 on the top of the base plate 1. Each positioning block 4 has a pin 5 on its top. A top cover 6 is provided above the intermediate body 3, and the bottom of the top cover 6 has a pin hole 7 for the pin 5 to pass through. The shell 2 is mounted on the intermediate body 3, and then the top cover 6 is placed on top of the shell 2, causing the pin 5 to embed into the pin hole 7, thereby limiting the position of the shell 2.

[0032] In this embodiment, the intermediate 3 can be made of aluminum (coated with Teflon) or POM, which can prevent damage to the inner wall of the shell 2.

[0033] Based on the first embodiment, this utility model provides a second embodiment of a limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell. The top of the base plate 1 is fixed with limiting blocks 8 on both the left and right sides of the intermediate body 3. When the shell 2 is fitted onto the intermediate body 3, the left and right sides of the shell 2 contact the inner sides of the two limiting blocks 8 respectively, so that the shell 2 can be better limited.

[0034] In this embodiment, the limiting block 8 can be made of POM or aluminum (with Teflon coating) to prevent damage to the outer surface of the housing 2.

[0035] Based on any of the above embodiments, this utility model provides a third embodiment of a limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell. The base plate 1 has a first conveying chamber (not shown), and a first air pipe 9 communicating with the first conveying chamber is fixed to one side of the base plate 1. The top of the base plate 1 has an air outlet 10 communicating with the first conveying chamber. The bottom of the intermediate body 3 has an air supply channel 11 communicating with the air outlet 10, and the upper end of the air supply channel 11 extends to the top of the intermediate body 3.

[0036] Explosion test: The upper cover 6 is pressed down by the clamping device, so that the upper cover 6 and the intermediate body 3 clamp the explosion-proof valve 21 area at the bottom of the housing 2. Then, helium gas is introduced into the first gas pipe 9. The helium gas passes through the first delivery chamber, the gas outlet 10, and the gas delivery channel 11 in sequence, and finally reaches the explosion-proof valve 21 at the bottom of the housing 2 until the explosion-proof valve 21 at the bottom of the housing 2 opens. Finally, the explosion tester determines the explosion pressure.

[0037] Based on the third embodiment, this utility model provides a fourth embodiment of a limiting fixture for assisting in the functional testing of the explosion-proof valve at the bottom of the aluminum shell. The top of the base plate 1 is provided with a first placement groove on the outer periphery of the air outlet 10. The first placement groove has a first sealing ring 12. The first sealing ring 12 can seal the gap between the intermediate body 3 and the base plate 1, preventing helium from flowing out from the gap between the intermediate body 3 and the base plate 1.

[0038] Based on any of the above embodiments, this utility model provides a fifth embodiment of a limiting fixture for assisting in the functional testing of the explosion-proof valve at the bottom of an aluminum shell, wherein the top of the intermediate body 3 has a first clearance area 13 for accommodating the explosion-proof valve 21 at the bottom of the aluminum shell.

[0039] In this embodiment, the size of the first air-proof area 13 is 0.5mm-1mm larger than the maximum size of the explosion-proof valve 21 to prevent scratching of the explosion-proof valve 21.

[0040] Based on the fifth embodiment, this utility model provides a sixth embodiment of a limiting fixture for assisting in the functional testing of the explosion-proof valve at the bottom of the aluminum shell. The top of the intermediate body 3 is provided with a second placement groove on the outer periphery of the first clearance area 13. The second placement groove has a second sealing ring 14. The second sealing ring 14 can seal the gap between the intermediate body 3 and the explosion-proof valve 21 at the bottom of the aluminum shell, preventing helium from flowing out from the gap between the intermediate body 3 and the explosion-proof valve 21 at the bottom of the aluminum shell.

[0041] Based on the third or fourth embodiment, this utility model provides a seventh embodiment of a limiting fixture for assisting in the functional testing of the explosion-proof valve at the bottom of an aluminum shell. The bottom of the upper cover 6 has a second clearance area 15 for accommodating the explosion-proof valve 21 at the bottom of the aluminum shell. A second air pipe 16 communicating with the second clearance area 15 is fixed to one side of the upper cover 6.

[0042] Helium test: The upper cover 6 is pressed down by the clamping device, so that the upper cover 6 and the intermediate body 3 clamp the explosion-proof valve 21 area at the bottom of the shell 2. The second gas pipe 16 is connected to the helium mass spectrometer leak detector. Then, helium gas is introduced into the first gas pipe 9. The helium gas passes through the first delivery chamber, the gas outlet 10, and the gas delivery channel 11 in sequence, and finally reaches the explosion-proof valve 21 at the bottom of the shell 2. The helium mass spectrometer leak detector performs vacuum testing to detect the leak rate. The airtightness of the explosion-proof valve 21 is determined based on the leak rate.

[0043] like Figure 6 and Figure 8 As shown, in this embodiment, when the explosion-proof valve 21 is I-shaped, the second evacuation zone 15 is a rounded rectangle. Figure 2 and Figure 7 As shown, when the explosion-proof valve 21 is of the runway type, the second evacuation zone 15 is of the runway type.

[0044] Based on the seventh embodiment, this utility model provides an eighth embodiment of a limiting fixture for assisting in the functional testing of the explosion-proof valve at the bottom of an aluminum shell. The bottom of the upper cover 6 is provided with a third placement groove on the outer periphery of the second clearance area 15. The third placement groove has a third sealing ring 17. The third sealing ring 17 can seal the gap between the upper cover 6 and the explosion-proof valve 21 at the bottom of the aluminum shell, preventing helium from flowing out from the gap between the upper cover 6 and the explosion-proof valve 21 at the bottom of the aluminum shell.

[0045] In this invention, the helium mass spectrometer leak detector can be the WanYi brand SFJ-211 helium mass spectrometer leak detector, but it is not limited to this. The explosion tester can be the CZ-APF08H-02 explosion tester, but it is not limited to this.

[0046] In this invention, the clamping device 18 includes a base 19, which is fixedly connected to a top plate 24 via two guide shafts 20. A bushing 21 is fitted onto each guide shaft 20, and the two bushings 21 are connected via a pressure plate 22. Two cylinders 23 are fixed to the bottom of the top plate 24, and the lower push rods of both cylinders 23 are connected to the pressure plate 22. When the limiting fixture is placed on the base 19, the two cylinders 23 simultaneously drive the push rods downwards, thereby causing the pressure plate to press the upper cover 6 downwards.

[0047] In this invention, the clamping device can also use existing clamping equipment to press down and clamp the upper cover 6.

[0048] The above description is only a preferred embodiment of the present utility model and should not be construed as a limitation of this application. All equivalent changes and modifications made within the scope of the patent application of the present utility model should be included in the scope of the present utility model.

Claims

1. A limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell, characterized in that, The device includes a base plate, on the top of which is a middle body for housing assembly. Positioning blocks are fixed on both the front and rear sides of the middle body at the top of the base plate. The top of each positioning block has a pin. A top cover is provided above the middle body, and the bottom of the top cover has a pin hole for the pin to pass through.

2. The limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell according to claim 1, characterized in that, Limiting blocks are fixed on both the left and right sides of the top of the base plate.

3. The limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell according to claim 1, characterized in that, The base plate has a first conveying chamber, and a first air pipe communicating with the first conveying chamber is fixed to one side of the base plate; the top of the base plate has an air outlet communicating with the first conveying chamber; the bottom of the intermediate body has an air supply channel communicating with the air outlet, and the upper end of the air supply channel extends to the top of the intermediate body.

4. The limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell according to claim 3, characterized in that, The top of the base plate has a first placement groove on the outer periphery of the air outlet, and the first placement groove has a first sealing ring.

5. A limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell, as described in claim 1, characterized in that... The top of the intermediate body has a first clearance area.

6. A limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell, as described in claim 5, is characterized in that... The top of the intermediate body is provided with a second placement groove on the outer periphery of the first clearance area, and the second placement groove has a second sealing ring.

7. A limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell, as described in claim 1, is characterized in that... The bottom of the top cover has a second air-proof area, and a second air pipe communicating with the second air-proof area is fixed to one side of the top cover.

8. A limiting fixture for assisting in the functional testing of an explosion-proof valve at the bottom of an aluminum shell, as described in claim 7, is characterized in that... The bottom of the top cover is provided with a third placement groove on the outer periphery of the second air-proof area, and the third placement groove has a third sealing ring.

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