Auxiliary airtight testing device for explosion-proof valve of PACK battery pack

Abstract

The utility model relates to the technical field of lithium ion battery pack manufacturing, and discloses a PACK battery pack explosion-proof valve auxiliary airtight testing device which comprises a bottom plate and a frame body arranged on the bottom plate, a pressing module is arranged above the frame body, a blocking module is arranged below the pressing module, and a sealing module is arranged below the blocking module. The bottom plate is further provided with an air inflation module and a shell plugging panel arranged on the air inflation module, and the pressing module drives the plugging module to be close to the shell plugging panel. According to the utility model, on the premise that the explosion-proof valve and the shell are not damaged, the air tightness of the connection between the explosion-proof valve and the shell can be tested, and batch testing in the mass production process can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion battery pack manufacturing, and particularly relates to an auxiliary airtightness testing device for an explosion-proof valve of a PACK battery pack. Background Technique

[0002] With the country's support and promotion of the development of environmental protection new energy, actively developing new energy vehicles is the future development direction of the automotive industry, and lithium battery technology is one of the key technologies for the development of electric vehicles.

[0003] In the production process of lithium-ion battery packs, it is necessary to test the external protection level of the lithium-ion battery packs. Among them, it is necessary to detect the important characteristics of the external protection level of the battery packs. Whether the protection level can be accurately measured will directly affect the performance of the battery when the customer uses it later. Even the battery pack may be flooded with water or metal foreign objects, etc., which will affect the safety of the battery pack during the later use process.

[0004] At present, for the scheme of the airtightness between the battery pack shell and the explosion-proof valve, mainly sealant is used at the vent hole position of the explosion-proof valve, and then after the shell is assembled, a hole is drilled on the shell surface and an air pipe is inserted. After sealing the sealant at the contact position between the air pipe and the shell, an airtightness tester is connected for airtightness testing.

[0005] However, the above-mentioned scheme requires sealing the explosion-proof valve with sealant and drilling holes in the shell, which will cause irreversible damage to the product during the testing process and can only be used for sample testing and cannot be applied to mass production. Content of the Utility Model

[0006] The purpose of the utility model is to provide an auxiliary airtightness testing device for an explosion-proof valve of a PACK battery pack, which can test the airtightness of the connection between the explosion-proof valve and the shell without damaging the explosion-proof valve and the shell, and can realize batch testing during mass production.

[0007] The above technical purpose of the utility model is achieved through the following technical scheme: an auxiliary airtightness testing device for an explosion-proof valve of a PACK battery pack, including a bottom plate, a frame body arranged on the bottom plate, a pressing module arranged above the frame body, a blocking module arranged below the pressing module, an inflation module arranged on the bottom plate, and a shell sealing panel arranged on the inflation module, and the pressing module drives the blocking module to approach the shell sealing panel.

[0008] A further setting of the present utility model is that the downward pressing module includes a manual push-pull clamp, a pressing rod, a lower fixing plate, and an upper cover pressing plate. The manual push-pull clamp is arranged on the frame body. The pressing rod is coaxially arranged at the push rod end of the manual push-pull clamp. The pressing rod slidably penetrates through the frame body. The lower fixing plate is horizontally and fixedly connected to the end of the pressing rod. The upper cover pressing plate is arranged on the lower fixing plate. The manual push-pull clamp drives the pressing rod to move up and down, driving the upper cover pressing plate on the lower fixing plate to move up and down.

[0009] A further setting of the present utility model is that left and right guide rods are vertically arranged on the lower fixing plate. The left and right guide rods are respectively arranged on both sides of the pressing rod. The upper ends of the left and right guide rods are slidably inserted into the frame body. By adopting the above technical solution, a relatively stable operating position of the downward pressing module can be ensured.

[0010] A further setting of the present utility model is that the plugging module includes an explosion-proof valve plug arranged above the outer shell plugging panel and a communication interface plug arranged below the upper cover pressing plate.

[0011] A further setting of the present utility model is that a silica gel pad with a thickness of 1.5 - 3 mm is arranged above the explosion-proof valve plug.

[0012] By adopting the above technical solution, a silica gel pad with a thickness of 1.5 - 3 mm is used as the plugging cover above the explosion-proof valve plug to ensure the plugging reliability. The communication interface plug is fixed below the upper cover pressing plate. During the operation of the pressing rod, the communication port plugging device changes with the state of the pressing rod. It prevents air leakage from the outer shell below the plug, achieving the effect of plugging the communication port to the outside.

[0013] A further setting of the present utility model is that a plurality of positioning columns are arranged on the outer shell plugging panel.

[0014] By adopting the above technical solution, four metal positioning columns are distributed above the outer shell plugging panel according to the positions of the screw holes of the battery pack outer shell, mainly for positioning the upper shell during testing.

[0015] A further setting of the present utility model is that the inflation module is a gas guide plate arranged between the bottom plate and the outer shell plugging panel, and a quick trachea connector is arranged on the gas guide plate.

[0016] By adopting the above technical solution, a quick trachea connector design is adopted at the front end of the gas guide plate. The test gas is introduced into the battery pack shell through the air duct for testing operations.

[0017] The beneficial effects of the present utility model are:

[0018] 1. The utility model can test the airtightness of the connection between the explosion-proof valve and the housing without damaging the explosion-proof valve and the housing, and can realize batch testing during mass production.

[0019] 2. By quickly pressing down or lifting the pressing module, the utility model can quickly clamp the housing to be measured, reducing the long clamping time. At the same time, since the pressing module is configured with left and right guide rods, the balance of the left and right pressures on the outer shell during the pressing process and the pressure holding process can be ensured.

[0020] 3. By using the plugging module, the utility model can quickly plug the communication interface, the explosion-proof valve, and the openings of the battery pack housing, improving the defect that the original shell was damaged after testing due to the need to use glue sealing.

[0021] 4. By using the inflation module, the utility model can realize rapid inflation of the outer shell without further operation after the product is clamped, reducing the operational inconvenience caused by the need to clamp the air pipe in the original test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the working structure of the present utility model.

[0024] Figure 2 It is a schematic diagram of the structure of the present utility model.

[0025] Figure 3 It is a front view schematic diagram of the present utility model.

[0026] In the figure, 1. bottom plate; 2. frame body; 3. pressing module; 31. manual push-pull clamp; 32. pressing rod; 33. lower fixing plate; 34. upper cover pressing plate; 35. left guide rod; 36. right guide rod; 4. explosion-proof valve plug; 41. silicone pad; 5. outer shell plugging panel; 51. communication interface plug; 6. positioning post; 7. air guide plate; 71. quick air pipe connector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions of the present utility model in combination with specific embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] Embodiment, such as Figure 1 As shown, an explosion-proof valve auxiliary airtight test device for a PACK battery pack includes a bottom plate 1 and a frame 2 arranged on the bottom plate 1. A pressing module 3 is arranged above the frame 2, and a plugging module is arranged below the pressing module 3. An inflation module and a housing sealing panel 5 arranged on the inflation module are also arranged on the bottom plate 1. The pressing module 3 drives the plugging module to approach the housing sealing panel 5.

[0029] Such as Figure 2 As shown, a further setting of the present utility model is: the pressing module 3 includes a manual push-pull clamp 31, a pressure rod 32, a lower fixing plate 33, and an upper cover pressing plate 34. The manual push-pull clamp 31 is arranged on the frame 2. The pressure rod 32 is coaxially arranged at the push rod end of the manual push-pull clamp 31. The pressure rod 32 is slidably inserted through the frame 2. The lower fixing plate 33 is horizontally fixedly connected to the end of the pressure rod 32. The upper cover pressing plate 34 is arranged on the lower fixing plate 33. The manual push-pull clamp drives the pressure rod 32 to move up and down to drive the upper cover pressing plate 34 on the lower fixing plate 33 to move up and down.

[0030] Such as Figure 2 As shown, a further setting of the present utility model is: a left guiding rod 35 and a right guiding rod 36 are vertically arranged on the lower fixing plate 33. The left guiding rod 35 and the right guiding rod 36 are respectively arranged on both sides of the pressure rod 32. The upper ends of the left guiding rod 35 and the right guiding rod 36 are slidably inserted into the frame 2. By adopting the above technical solution, it can ensure that the pressing module 3 has a relatively stable operating position.

[0031] Such as Figure 2 As shown, a further setting of the present utility model is: the plugging module includes an explosion-proof valve plug 4 arranged above the housing sealing panel 5 and a communication interface plug 51 arranged below the upper cover pressing plate 34.

[0032] Such as Figure 2 As shown, a further setting of the present utility model is: a silica gel pad 41 with a thickness of 1.5 - 3 mm is arranged above the explosion-proof valve plug 4. Among them, a silica gel pad 41 with a thickness of 1.5 - 3 mm is used as the plugging cover above the explosion-proof valve plug 4 to ensure the plugging reliability. The communication interface plug 51 is fixed below the upper cover pressing plate 34. During the operation of the pressure rod 32, the communication port plugging device 113 changes with the state of the pressure rod 32108. Air leakage of the housing is prevented below the plug, achieving the effect of plugging the communication port to the outside.

[0033] Such as Figure 3As shown in the figure, the shell sealing panel 5 is provided with four metal positioning posts 6, which are distributed above the shell sealing panel 5 according to the positions of the screw holes of the battery pack shell, and mainly play a role in positioning the upper shell during testing.

[0034] As Figure 2 shown in the figure, the inflation module is a gas guide plate 7 arranged between the bottom plate 1 and the shell sealing panel 5, and a quick trachea connector 71 is arranged on the gas guide plate 7. The front end of the gas guide plate 7 adopts the design of a quick trachea connector, and the test gas is introduced into the battery pack shell through the air duct for testing operations.

[0035] The pressing process of the present utility model is as follows:

[0036] Step 1: Connect the airtight tester trachea to the quick trachea connector 71 on the gas guide plate 7.

[0037] Step 2: Flip the manual push-pull clamp 31 upwards by 90°, so that the pressing module 3 moves upwards.

[0038] Step 3: Place the battery pack shell with the explosion-proof valve already installed into the tooling, so that the bolt fixing holes are matched with the four metal positioning posts 6.

[0039] Step 4: Flip the manual push-pull clamp 31 downwards by 90°, so that the pressing module 3 moves downwards to achieve the blocking operation.

[0040] Step 5: Start the airtight tester and observe the airtight test results.

[0041] The present utility model can test the airtightness of the connection between the explosion-proof valve and the shell without damaging the explosion-proof valve and the shell, and can realize batch testing during mass production. By quickly pressing or lifting the pressing module 3, the present utility model can quickly clamp the shell to be tested, reducing the long clamping time. At the same time, since the pressing module 3 is configured with left and right guide rods 36, the balance of the left and right pressures on the shell during the pressing process and the pressure-holding process can be ensured. By using the blocking module, the present utility model can quickly block the communication interface, the explosion-proof valve, and the opening of the battery pack shell, improving the defect that the original shell was damaged after using glue sealing for testing. By using the inflation module, the present utility model can realize rapid inflation of the shell without further operation after the product is clamped, reducing the operational inconvenience caused by the need to clamp the trachea in the original test.

Claims

1. A PACK battery pack explosion-proof valve auxiliary airtightness test device, characterized in that: The invention comprises a bottom plate (1), a frame (2) arranged on the bottom plate (1), a pressing module (3) being arranged above the frame (2), a blocking module being arranged below the pressing module (3), an inflation module and a shell blocking panel (5) being arranged on the inflation module being further arranged on the bottom plate (1), the pressing module (3) driving the blocking module to approach the shell blocking panel (5), the pressing module (3) comprising a manual push-pull clamp (31), a pressure rod (32), a lower fixing plate (33), and an upper cover pressure plate (34), the manual push-pull clamp (31) being arranged on the frame (2), the pressure rod (32) being coaxially arranged at the push rod end of the manual push-pull clamp (31), the pressure rod (32) being slidably plugged into the frame (2), and the lower fixing plate (33) is horizontally fixedly connected to the end of the pressure rod (32), the upper cover pressure plate (34) is arranged on the lower fixed plate (33), the manual push-pull clamp (31) drives the pressure rod (32) to move up and down, driving the upper cover pressure plate (34) on the lower fixed plate (33) to move up and down, and the lower fixed plate (33) is vertically provided with a left guide rod (35) and a right guide rod (36), the left guide rod (35) and the right guide rod (36) are respectively arranged on both sides of the pressure rod (32), and the upper ends of the left guide rod (35) and the right guide rod (36) are slidably plugged into the frame (2), and the blocking module includes an explosion-proof valve plug (4) arranged above the shell blocking panel (5) and a communication interface plug (51) arranged below the upper cover pressure plate (34).

2. A PACK battery pack explosion-proof valve auxiliary airtightness test device according to claim 1, characterized in that: A silicone pad (41) with a thickness of 1.5-3 mm is arranged above the explosion-proof valve plug (4).

3. The auxiliary airtightness test device for a PACK battery pack explosion-proof valve according to claim 1, characterized in that: The shell blocking panel (5) is provided with a plurality of positioning posts (6).

4. A PACK battery pack explosion-proof valve auxiliary airtightness test device according to claim 1, characterized in that: The inflation module is an air guide plate (7) arranged between the bottom plate (1) and the shell blocking panel (5), and an air pipe quick plug connector (71) is arranged on the air guide plate (7).

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