Battery pack air tightness test auxiliary tooling

Abstract

The application relates to the technical field of battery pack air tightness detection, in particular to a battery pack air tightness test auxiliary tool, which comprises a tool shell, mounting plates fixedly connected to the two ends of the tool shell, clamping mechanisms arranged in the mounting plates, two sealing rods fixedly connected to the tool shell, and liquid inlet pipes and liquid outlet pipes in a panel clamped and installed together by the two clamping mechanisms. The two sealing rods are used for sealing the liquid inlet pipes and the liquid outlet pipes in the panel. The tool shell and the panel are clamped and installed together by the clamping mechanisms, a connecting pipe is connected to an air tightness test equipment, compressed air enters the inner side of the tool shell, when unqualified air tightness is detected, the air tightness test equipment cancels air charging in the tool shell, a telescopic cylinder is started to make two connecting rings adhere to the panel, UV sealant is injected into telescopic hoses by the equipment and filled into grooves of the connecting rings, the UV sealant is solidified by a UV lamp strip to make the sealing part resealed, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of battery pack airtightness testing technology, specifically to an auxiliary tooling for battery pack airtightness testing. Background Technology

[0002] For example, Chinese patent CN120176944A discloses an auxiliary tooling for airtightness testing, including a tooling shell, a receiving cavity, a first sealing gasket, and an interface. The tooling shell is used to fit against the outer side of the panel connected to the battery pack shell. The receiving cavity is disposed in the tooling shell and is used to receive the nozzle of the liquid cooling pipe end in the battery pack. The first sealing gasket is disposed on the inner side of the tooling shell and surrounds the airtightness detection area on the panel of the battery pack shell to form a sealing area.

[0003] The aforementioned patent uses the bonding of the tooling shell to the panel and the sealing of the airtightness testing area by the first sealing gasket to isolate the sealing part between the nozzles at both ends of the liquid cooling pipe and the panel within the sealing area. It connects to the airtightness testing equipment through the interface to achieve airtightness testing. However, the above solution has the following shortcomings: Although the above patent can achieve airtightness testing, when the airtightness is found to be substandard, it is not possible to directly repair the substandard airtightness location using this auxiliary tooling and then perform airtightness testing again. Therefore, it does not achieve the effect of improving the overall production efficiency. To address this, we have introduced an auxiliary tooling for battery pack airtightness testing. Summary of the Invention

[0004] The purpose of this invention is to provide an auxiliary tooling for testing the airtightness of battery packs, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An auxiliary fixture for testing the airtightness of a battery pack includes a fixture housing. Mounting plates are fixedly connected to both ends of the fixture housing. Clamping mechanisms are provided within the mounting plates to clamp and install the fixture housing and a panel together. Two sealing rods are fixedly connected inside the fixture housing to seal the inlet and outlet pipes within the panel. Connecting rings are slidably connected to the outer sides of each sealing rod, and the two connecting rings are connected to each other via connecting blocks. One end of the connecting ring is recessed and fixedly connected to a UV lamp strip. An electromagnetic valve is fixedly connected to the end of the connecting ring near the UV lamp strip. A storage groove is opened in the end of the connecting ring away from the UV lamp strip. A telescopic hose is provided in the storage groove. One end of the telescopic hose extends into the connecting ring and is connected to the electromagnetic valve. The other end passes through the tooling housing and extends into the external environment.

[0006] Preferably, the clamping mechanism includes two support rods, which are fixedly connected to two first T-shaped rods. The first T-shaped rods are movably connected to the mounting plate. A first connecting spring is sleeved on the outside of the first T-shaped rod. One end of the first connecting spring is fixedly connected to the first T-shaped rod, and the other end is fixedly connected to the mounting plate.

[0007] Preferably, a connecting plate is movably connected to one side of the support rod, and one side of the connecting plate is fixedly connected to the connecting rod. A motor is fixedly connected to the outside of the support rod, and the output end of the motor is fixedly connected to the connecting plate. An inclined pressing block is fixedly connected to the end of the connecting rod away from the connecting plate, and both ends of the connecting plate are arc-shaped.

[0008] Preferably, a limit box is fixedly connected to the support rod near the motor side. A second T-shaped rod is slidably connected inside the limit box. The end of the second T-shaped rod near the connecting plate is inclined and is engaged in a locking hole. Two locking holes are provided in the connecting plate. A second connecting spring is fixedly connected inside the limit box. The other end of the second connecting spring is fixedly connected to the second T-shaped rod. An electromagnet is fixedly installed inside the limit box.

[0009] Preferably, a telescopic cylinder is fixedly connected to the outer side of the tooling housing, and the output end of the telescopic cylinder extends into the inner side of the tooling housing and is fixedly connected to the connecting block.

[0010] Preferably, a rubber sealing strip is fixedly connected to one side of the tooling housing, and a connecting pipe is fixedly connected to one side of the tooling housing.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention clamps and installs the tooling shell and the panel together through a clamping mechanism. By connecting the air tightness testing equipment to the connecting pipe, compressed air is introduced into the inner side of the tooling shell. When the air tightness is found to be unqualified, the air tightness testing equipment will stop inflating the tooling shell. The telescopic cylinder is activated to make the two connecting rings fit with the panel. The UV sealant is injected into the telescopic hose and fills the groove of the connecting ring through the equipment. The UV sealant is cured by the UV lamp strip to reseal the sealing part, thereby improving testing and production efficiency. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention in use. Figure 2 This is a three-dimensional structural diagram showing the connection relationship between the battery pack panel, the inlet pipe, the outlet pipe, and the sealing part of the present invention. Figure 3 This is a three-dimensional structural diagram of the present invention in its uninstalled state; Figure 4 This is a three-dimensional sectional view of the installation state of the present invention; Figure 5This is a three-dimensional structural diagram of the connecting ring position of the present invention; Figure 6 This is a three-dimensional structural diagram of the connecting plate in the separated state of the present invention; Figure 7 This is a three-dimensional cross-sectional view of the connection relationship between the second connecting spring and the snap-fit ​​hole of the present invention; Figure 8 This is a three-dimensional structural diagram illustrating the connection relationship between the connecting ring and the connecting block of the present invention.

[0013] In the diagram: 1. Panel; 2. Inlet pipe; 3. Outlet pipe; 4. Sealing part; 5. Mounting plate; 6. Telescopic cylinder; 7. First connecting spring; 8. First T-shaped rod; 9. Motor; 10. Limit box; 11. Connecting rod; 12. Inclined extrusion block; 13. Connecting pipe; 14. Tooling housing; 15. Rubber sealing strip; 16. Support rod; 17. Connecting plate; 18. Snap-fit ​​hole; 19. Connecting ring; 20. UV lamp strip; 21. Telescopic hose; 22. Sealing rod; 23. Second T-shaped rod; 24. Electromagnet; 25. Second connecting spring; 26. Solenoid valve; 27. Storage slot; 28. Connecting block. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figure 1-8 The present invention provides a technical solution: Example 1: An auxiliary fixture for testing the airtightness of a battery pack includes a fixture housing 14. Mounting plates 5 are fixedly connected to both ends of the fixture housing 14. Clamping mechanisms are provided inside the mounting plates 5. The fixture housing 14 and a panel 1 are clamped together by the two clamping mechanisms. Two sealing rods 22 are fixedly connected inside the fixture housing 14. The two sealing rods 22 seal the inlet pipe 2 and outlet pipe 3 inside the panel 1. A robotic arm grips the fixture housing 14, moving the panel 1 to a position. The robotic arm then presses the fixture housing 14 against the panel 1. The two sealing rods 22 on the inner side of the fixture housing 14 seal the inlet pipe 3 and outlet pipe 2. Connecting rings 19 are slidably connected to the outer sides of the two sealing rods 22. The two connecting rings 19 are connected to each other by connecting blocks 28. One end of each connecting ring 19 is recessed and fixedly connected to a UV lamp strip 20. Appropriate sizes and models of UV lamp strips can be selected for use according to actual conditions. A solenoid valve 26 is fixedly connected to the end of the connecting ring 19 near the UV lamp strip 20. UV sealant is injected into the telescopic hose 21 through the equipment. Then, by opening the solenoid valve 26, the UV sealant in the telescopic hose 21 enters the groove of the connecting ring 19. After the injection is completed, the solenoid valve 26 closes. A storage groove 27 is opened in the end of the connecting ring 19 away from the UV lamp strip 20. The telescopic hose 21 is placed in the storage groove 27. One end of the telescopic hose 21 extends into the connecting ring 19 and is connected to the solenoid valve 26. The other end extends through the tooling housing 14 into the external environment. The end of the telescopic hose 21 extending out of the tooling housing 14 is connected to an external glue supply device. Due to the setting of the telescopic hose 21, when the connecting ring 19 moves, the telescopic hose 21 folded in the storage groove 27 will be straightened. When the connecting ring 19 returns to the initial position, the telescopic hose 21 will be folded back into the storage groove 27.

[0016] Example 2: Based on Embodiment 1, in order to enable the tooling housing 14 to be quickly installed onto the panel 1, the clamping mechanism includes two support rods 16. The support rods 16 are fixedly connected to two first T-shaped rods 8. The first T-shaped rods 8 are movably connected within the mounting plate 5. A first connecting spring 7 is sleeved on the outside of the first T-shaped rod 8. One end of the first connecting spring 7 is fixedly connected to the first T-shaped rod 8, and the other end is fixedly connected to the mounting plate 5. A connecting plate 17 is movably connected to one side of the support rod 16. One side of the connecting plate 17 is fixedly connected to the connecting rod 11. A connecting plate 17 is fixedly connected to the outside of the support rod 16. Motor 9, the output end of motor 9 is fixedly connected to connecting plate 17, and an inclined pressing block 12 is fixedly connected to the end of connecting rod 11 away from connecting plate 17. Both ends of connecting plate 17 are arc-shaped. The rotation of motor 9 drives connecting plate 17 to rotate. At the same time, electromagnet 24 will cancel the attraction of second T-shaped rod 23. During the rotation of connecting plate 17, inclined pressing block 12 will rotate. When the inclined end of inclined pressing block 12 contacts panel 1, the support rod 16 will be driven to move towards panel 1 as inclined pressing block 12 rotates. A limit box 10 is fixedly connected to the support rod 16 near the motor 9. A second T-shaped rod 23 is slidably mounted inside the limit box 10. The end of the second T-shaped rod 23 near the connecting plate 17 is inclined and engaged in the engagement hole 18. The connecting plate 17 has two engagement holes 18. A second connecting spring 25 is fixedly connected inside the limit box 10. The other end of the second connecting spring 25 is fixedly connected to the second T-shaped rod 23. An electromagnet 24 is fixedly installed inside the limit box 10. When the electromagnet 24 is activated, it attracts the second T-shaped rod 23. At this time, the second T-shaped rod 23 disengages from the engagement hole 18. The rotation of the motor 9 drives the connecting plate 17 to rotate, and at the same time, the electromagnet 24 releases the second T-shaped rod 23. Attracted by the two T-shaped rods 23, a telescopic cylinder 6 is fixedly connected to the outside of the tooling housing 14. The output end of the telescopic cylinder 6 extends into the inside of the tooling housing 14 and is fixedly connected to the connecting block 28. The telescopic cylinder 6 will start and drive the connecting block 28 to move. The movement of the connecting block 28 will drive the two connecting rings 19 to move. When the connecting rings 19 are in contact with the panel 1, the sealing part 4 is located in the groove inside the connecting rings 19. A rubber sealing strip 15 is fixedly connected to one side of the tooling housing 14, and a connecting pipe 13 is fixedly connected to one side of the tooling housing 14. Under the elastic force of the inclined pressing block 12 and the first connecting spring 7, the tooling housing 14 and the panel 1 are tightly clamped together, and the gap between the tooling housing 14 and the panel 1 is sealed by the rubber sealing strip 15.

[0017] Working principle: During use, the robotic arm grips the tooling housing 14, moving the panel 1 to the desired position. The robotic arm then attaches the tooling housing 14 to the panel 1. Two sealing rods 22 on the inner side of the tooling housing 14 seal the inlet pipe 3 and outlet pipe 2. After attachment, the electromagnet 24 inside the limit box 10 is activated, attracting the second T-shaped rod 23. At this time, the second T-shaped rod 23 disengages from the snap-fit ​​hole 18. The rotation of the motor 9 drives the connecting plate 17 to rotate, and the electromagnet 24 releases its attraction to the second T-shaped rod 23. During the rotation of the connecting plate 17, the inclined pressing block 12 will rotate accordingly. When the inclined end of the inclined pressing block 12 contacts the panel 1, the support rod 16 will be driven to move towards the panel 1 as the inclined pressing block 12 rotates. The movement of the support rod 16 will drive the two first T-shaped rods 8 to move. The movement of the first T-shaped rods 8 will compress the first connecting spring 7. When the lower side of the inclined pressing block 12 is about to rotate to the lower side, since the two ends of the connecting plate 17 are arc-shaped, after the arc-shaped position of the connecting plate 17 contacts the inclined end of the second T-shaped rod 23, At this time, as the connecting plate 17 rotates, the second T-shaped rod 23 will be squeezed and moved into the limiting box 10. When the other locking hole 18 rotates to the position of the second T-shaped rod 23, the second T-shaped rod 23 will be locked into the locking hole 18 under the elastic force of the second connecting spring 25, so that the connecting plate 17 cannot rotate. At the same time, the motor 9 also stops rotating. At this time, under the elastic force of the inclined pressing block 12 and the first connecting spring 7, the tooling shell 14 and the panel 1 are tightly clamped together, and the gap between the tooling shell 14 and the panel 1 is sealed by the rubber sealing strip 15. Connect the air tightness testing equipment to the connecting pipe 13, and inject compressed air into the tooling housing 14 through the air tightness testing equipment. If the sealing part 4 is damaged or the sealing effect is poor, the gas will leak from the sealing part 4 to the outside, and the pressure will continue to drop. The equipment will determine that it is unqualified. If the seal is intact, the gas is confined between the tooling housing 14 and the panel 1, and the pressure remains stable. The equipment will determine that the seal is qualified. When an airtightness failure is detected, the airtightness testing equipment will stop inflating the tooling housing 14. At the same time, the telescopic cylinder 6 will start and move the connecting block 28. The movement of the connecting block 28 will move the two connecting rings 19. When the connecting rings 19 are in contact with the panel 1, the sealing part 4 is located in the groove of the connecting ring 19. The equipment injects UV sealant into the telescopic hose 21. Then, by opening the solenoid valve 26, the UV sealant in the telescopic hose 21 enters the groove of the connecting ring 19. After the injection is completed, the solenoid valve 26 closes, and the UV lamp 20 is turned on. Under the irradiation of the UV lamp 20, the UV sealant cures and re-seals the sealing part 4. The telescopic cylinder 6 moves the two connecting rings 19 back to the initial position, and the motor 9 rotates again so that the tilting extrusion block 12 no longer contacts the panel 1, and the tooling housing 14 can be removed.

[0018] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary fixture for testing the airtightness of a battery pack, comprising a fixture housing, characterized in that: The tooling housing is fixedly connected to both ends of the mounting plate. The mounting plate is provided with a clamping mechanism. The tooling housing and the panel are clamped and installed together by the two clamping mechanisms. Two sealing rods are fixedly connected inside the tooling housing. The liquid inlet pipe and liquid outlet pipe inside the panel are sealed by the two sealing rods. Connecting rings are slidably connected to the outside of the two sealing rods. The two connecting rings are connected to each other by connecting blocks. One end of the connecting ring is recessed and fixedly connected to a UV lamp strip. An electromagnetic valve is fixedly connected to the end of the connecting ring near the UV lamp strip. A storage groove is opened in the end of the connecting ring away from the UV lamp strip. A telescopic hose is provided in the storage groove. One end of the telescopic hose extends into the connecting ring and is connected to the electromagnetic valve. The other end passes through the tooling housing and extends into the external environment. When the connecting ring is in contact with the panel, the sealing part is located in the groove inside the connecting ring. A telescopic cylinder is fixedly connected to the outside of the tooling housing. The output end of the telescopic cylinder extends into the inside of the tooling housing and is fixedly connected to the connecting block. A rubber sealing strip is fixedly connected to one side of the tooling housing, and a connecting pipe is fixedly connected to one side of the tooling housing. One end of the telescopic hose extending out of the tooling housing is connected to an external glue supply device, through which UV sealant is injected into the telescopic hose.

2. The auxiliary tooling for battery pack airtightness testing according to claim 1, characterized in that: The clamping mechanism includes two support rods, which are fixedly connected to two first T-shaped rods. The first T-shaped rods are movably connected to the mounting plate. A first connecting spring is sleeved on the outside of the first T-shaped rod. One end of the first connecting spring is fixedly connected to the first T-shaped rod, and the other end is fixedly connected to the mounting plate.

3. The auxiliary tooling for battery pack airtightness testing according to claim 2, characterized in that: A connecting plate is movably connected to one side of the support rod, and one side of the connecting plate is fixedly connected to the connecting rod. A motor is fixedly connected to the outside of the support rod, and the output end of the motor is fixedly connected to the connecting plate. An inclined pressing block is fixedly connected to the end of the connecting rod away from the connecting plate. Both ends of the connecting plate are arc-shaped.

4. The auxiliary tooling for battery pack airtightness testing according to claim 3, characterized in that: The support rod is fixedly connected to a limit box near the motor side. A second T-shaped rod is slidably connected inside the limit box. The end of the second T-shaped rod near the connecting plate is inclined and is engaged in a locking hole. Two locking holes are opened in the connecting plate. A second connecting spring is fixedly connected inside the limit box. The other end of the second connecting spring is fixedly connected to the second T-shaped rod. An electromagnet is fixedly installed inside the limit box.

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