Battery pack air tightness test fixture

Abstract

The utility model discloses a battery pack air tightness test fixture, which comprises a shell, a sealing assembly and a driving assembly, a limiting cavity and an opening are formed in the shell, a clamping structure is arranged on the opening, and the clamping structure is used for fixing the shell at an anti-explosion valve; the sealing assembly comprises a sealing pressing piece and an air inlet piece, the sealing pressing piece is contained in the limiting cavity, one end of the air inlet piece is connected with the sealing pressing piece, and the other end of the air inlet piece penetrates through the shell and communicates with the outer side of the shell; the driving assembly is connected with the sealing assembly and used for driving the sealing assembly to move in the direction of the anti-explosion valve. Therefore, the shell can be quickly clamped and fixed on the anti-explosion valve through the clamping structure; meanwhile, the anti-explosion valve is pressed and sealed through the sealing pressing piece, and therefore the sealing performance of the butt joint position can be ensured; the driving assembly drives the sealing assembly to move, and therefore the sealing pressing piece can be controlled to be away from the anti-explosion valve or abut against the anti-explosion valve more conveniently. Therefore, the test efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production and manufacturing, in particular to a battery pack air tightness testing fixture. Background Art

[0002] With the rapid development of new energy technologies, battery packs are increasingly used in electric vehicles, energy storage systems and other fields. In the battery manufacturing process, the air tightness of the battery pack is of great significance to its safety and performance, so the air tightness test of the battery pack is also crucial. In the traditional battery pack air tightness test process, the inflation connector of the inflation equipment is usually installed directly on the explosion-proof valve of the battery pack, and then it is wrapped and sealed with a sealing rubber ring. However, this testing method is time-consuming and labor-intensive, inconvenient to assemble and disassemble, and cannot achieve rapid testing. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a battery pack air tightness test fixture, thereby being able to improve the test efficiency of the battery pack air tightness.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A battery pack air tightness test fixture comprises: a shell, a sealing assembly and a driving assembly, wherein a limited cavity is formed in the shell, and an opening is formed at one end of the shell, the opening is communicated with the limited cavity, a clamping structure is provided on the opening, and the clamping structure is used to fix the shell to the explosion-proof valve on the battery pack; the sealing assembly comprises a sealing pressing member and an air inlet member, the sealing pressing member is accommodated in the limited cavity, one end of the air inlet member is connected to a side of the sealing pressing member away from the opening, and the other end of the air inlet member passes through the shell and is communicated with the outside of the shell; the driving assembly is connected to the sealing assembly, and the driving assembly is used to drive the sealing assembly to approach or move away from the explosion-proof valve.

[0006] In one embodiment, a locking groove and a release groove are provided on the side wall of the limiting cavity, the locking groove and the release groove are connected, and the locking groove and the release groove are perpendicular to each other, and a first protrusion is provided on the sealing pressing member, when the first protrusion is located in the locking groove, the locking groove is used to lock and fix the sealing pressing member, and when the first protrusion is located in the release groove, the release groove is used to move the sealing pressing member toward the direction of the explosion-proof valve until the sealing pressing member is abutted against the explosion-proof valve.

[0007] In one of the embodiments, an adsorption magnet is provided on a side surface of the sealing pressing member facing the explosion-proof valve, and the adsorption magnet is used to control the opening and closing of the explosion-proof valve.

[0008] In one embodiment, the driving assembly also includes a driving handle, which is arranged on an end of the air inlet member away from the sealing pressing member, and the driving handle is used to drive the sealing pressing member to move so that the first protrusion on the sealing pressing member moves between the locking groove and the release groove.

[0009] In one embodiment, the driving assembly includes an elastic member, the elastic member is sleeved on the air inlet member, and the elastic member is located between the sealing holding member and the top wall of the limiting cavity.

[0010] In one embodiment, the elastic member is a spring.

[0011] In one embodiment, a docking notch is provided at the open end of the shell.

[0012] In one of the embodiments, a sealing ring is provided on the side of the sealing pressing member facing the explosion-proof valve, and the sealing ring abuts against the edge of the explosion-proof valve.

[0013] In one of the embodiments, a gas nozzle connector is provided at one end of the gas inlet member away from the sealing pressing member.

[0014] In one embodiment, the air intake member is an air intake pipe, and an air intake channel is formed on the air intake pipe.

[0015] Compared with the prior art, the utility model has at least the following advantages:

[0016] The battery pack air tightness test fixture of the utility model is provided with a shell, a sealing component and a driving component, so that a limiting cavity can be formed through the shell, so that the sealing pressing part can be accommodated in the limiting cavity, and a clamping structure is provided at the opening of the shell. When in use, it is only necessary to directly clamp the clamping structure on the shell onto the explosion-proof valve, so as to quickly complete the alignment installation of the shell. When disassembling, it is only necessary to correspondingly remove the shell to release the clamping fixation of the clamping structure. In this way, compared with the traditional method of connecting and fixing by bolts, the assembly and disassembly is faster; at the same time, the explosion-proof valve is pressed and sealed by the sealing pressing part, so as to ensure the sealing performance of the docking point, and then ensure the reliability of the test results; in addition, the sealing component can be driven to move by the driving component, so as to make it easier to control the sealing pressing part to be away from the explosion-proof valve or to be against the explosion-proof valve. In this way, the use of the battery pack air tightness test fixture is more convenient, and the assembly and disassembly is faster, so as to improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0018] Figure 1 It is a structural schematic diagram of a battery pack air tightness test fixture in one embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the battery pack air tightness test fixture;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the battery pack air tightness test fixture from another perspective;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the shell of the battery pack air tightness test fixture.

[0022] Figure numbers: 10-battery pack air tightness test fixture; 100-shell; 110-clamping structure; 120-locking groove; 130-release groove; 140-pressure cover; 150-docking notch; 200-sealing assembly; 210-sealing pressure holding member; 211-first protrusion; 212-sealing ring; 220-air inlet member; 221-air nozzle connector; 230-adsorption magnet; 300-driving assembly; 310-driving handle; 320-elastic member. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0024] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a battery pack air tightness test fixture 10 includes: a shell 100, a sealing assembly 200 and a driving assembly 300, a limited cavity is formed in the shell 100, and an opening is opened at one end of the shell, the opening is connected to the limited cavity, and a clamping structure 110 is arranged on the opening, and the clamping structure 110 is used to fix the shell 100 to the explosion-proof valve on the battery pack; the sealing assembly 200 includes a sealing pressing member 210 and an air inlet member 220, the sealing pressing member 210 is accommodated in the limited cavity, one end of the air inlet member 220 is connected to a side of the sealing pressing member 210 away from the opening, and the other end of the air inlet member 220 passes through the shell 100 and is connected to the outside of the shell 100; the driving assembly 300 is connected to the sealing assembly 200, and the driving assembly 300 is used to drive the sealing assembly 200 to move closer to or away from the explosion-proof valve.

[0025] It should be noted that the limiting cavity is formed by the shell 100, so that the sealing pressing member 210 can be accommodated in the limiting cavity. At the same time, by setting a clamping structure 110 at the opening of the shell 100, the shell 100 can be clamped on the explosion-proof valve more quickly through the clamping structure 110, that is, the battery air tightness test fixture 10 is more convenient to assemble and disassemble than the traditional method of connecting and fixing by bolts; further, after the shell 100 is connected to the explosion-proof valve, the explosion-proof valve can be pressed and sealed by the sealing pressing member 210, so that the sealing performance of the joint can be ensured, replacing the sealing method of the sealing rubber ring, so as to ensure the reliability of the test results; in addition, the sealing assembly 200 can be driven to move by the driving assembly 300, so that it is easier to control the sealing pressing member 210 to stay away from the explosion-proof valve or to abut against the explosion-proof valve. In this way, the battery pack air tightness test fixture 10 can be used more conveniently, assembled and disassembled more quickly, thereby improving the test efficiency. It should also be noted that the other end of the air intake member 220 passes through the shell 100 and is connected to the outside of the shell 100, which means that part of the air intake member 220 is located in the limiting cavity and part of it is located outside the limiting cavity, that is, the air intake end of the air intake member 220 extends to the outside of the shell 100, so as to facilitate the connection of the corresponding inflation device with the air intake member 220.

[0026] In one embodiment, the air intake member 220 is an air intake pipe, and an air intake channel is formed on the air intake pipe. Correspondingly, the sealing pressing member 210 is also provided with an air intake channel, and the air intake channel on the air intake pipe is connected with the air intake channel on the sealing pressing member 210; at the same time, the air intake member 220 passes through the housing 100 and is connected with the outside of the housing 100, so that the air intake member 220 can be easily connected with the corresponding inflatable device; when the sealing pressing member 210 is fixed against the explosion-proof valve, the inflatable device is ventilated into the air intake member 220, and the gas passes through the air intake channel on the air intake pipe and the air intake channel on the sealing pressing member 210, and finally passes through the explosion-proof valve into the battery pack, thereby realizing the air tightness test of the battery pack.

[0027] In one embodiment, the sealing pressing member 210 and the air inlet member 220 are an integrally formed structure, so that the sealing performance may not be affected by gaps at the assembly connection.

[0028] Further, an air nozzle connector 221 is provided at one end of the air inlet member 220 away from the sealing pressing member 210. By providing the air nozzle connector 221, it is convenient to quickly connect the air pipe of the inflatable device.

[0029] See also Figure 2 and Figure 4As shown, in one embodiment, a locking groove 120 and a release groove 130 are provided on the side wall of the limiting cavity, the locking groove 120 and the release groove 130 are connected, and the locking groove 120 and the release groove 130 are perpendicular to each other, and a first protrusion 211 is provided on the sealing pressing member 210, when the first protrusion 211 is located in the locking groove 120, the locking groove 120 is used to lock and fix the sealing pressing member 210, when the first protrusion 211 is located in the release groove 130, the release groove 130 is used to move the sealing pressing member 210 toward the direction of the explosion-proof valve until the sealing pressing member 210 is abutted against the explosion-proof valve.

[0030] It should be noted that before installing the battery pack airtightness test fixture 10 to the explosion-proof valve, the sealing pressing component 210 needs to be kept away from the opening for subsequent installation; at the same time, in order to avoid the need to manually control the sealing pressing component 210 to remain away from the opening for a long time, a locking groove 120 is opened on the side wall of the limiting cavity, and a first protrusion 211 is provided on the sealing pressing component 210, and the first protrusion 211 is moved into the locking groove 120, and the sealing pressing component 210 is locked and fixed by the locking groove 120 to prevent the sealing pressing component 210 from moving toward the direction close to the opening, so that the sealing pressing component 210 can remain away from the opening for a long time, and thus it is easier to install the battery airtightness test fixture to the explosion-proof valve. Further, after the housing 100 has been fixedly connected with the explosion-proof valve, the sealing pressing member 210 can be moved by the driving assembly 300, so that the first protrusion 211 moves from the locking groove 120 to the release groove 130, and the sealing pressing member 210 can be moved along the release groove 130 toward the explosion-proof valve through the release groove 130, until the sealing pressing member 210 abuts against the explosion-proof valve, thereby forming a sealed state. In this embodiment, a sealing ring 212 is provided on the side of the sealing pressing member 210 facing the explosion-proof valve, and the sealing ring 212 abuts against the edge of the explosion-proof valve to form a sealed state, thereby ensuring the reliability of the test results.

[0031] Furthermore, in order to ensure the stability of the sealing pressing member 210, two locking grooves 120 and release grooves 130 are provided on the side wall of the limiting cavity. Correspondingly, a second protrusion is also provided on the sealing pressing member 210, the first protrusion is arranged opposite to the second protrusion, and the first protrusion and the second protrusion are respectively located in the two locking grooves 120 or the release grooves 130 on the side wall of the limiting cavity.

[0032] In one embodiment, an adsorption magnet 230 is provided on one side of the sealing pressing member 210 facing the explosion-proof valve, and the adsorption magnet 230 is used to control the opening and closing of the explosion-proof valve. The explosion-proof valve has a valve switch, and the valve switch is made of metal. By directly providing the adsorption magnet 230 on the sealing pressing member 210, when the housing 100 is clamped and fixed to the explosion-proof valve, the adsorption magnet 230 adsorbs the valve switch on the explosion-proof valve and moves the valve switch away from the battery pack, thereby opening the explosion-proof valve, and then the airtightness test operation can be performed.

[0033] In one embodiment, the driving assembly 300 includes a driving handle 310, which is disposed on one end of the air inlet member 220 away from the sealing pressing member 210. The driving handle 310 is used to drive the sealing pressing member 210 to move so that the first protrusion 211 on the sealing pressing member 210 moves between the locking groove 120 and the release groove 130.

[0034] It should be noted that the driving handle 310 is arranged on the outside of the housing 100, so that the operator can control the movement of the sealing pressing member 210 through the driving handle 310. Specifically, in this embodiment, the locking groove 120 and the release groove 130 are in an "L"-shaped structure, and the locking groove 120 and the air inlet 220 are perpendicular to each other; when the battery pack airtightness test fixture 10 is not in use, the first protrusion 211 on the sealing pressing member 210 is located in the locking groove 120, and the sealing pressing member 210 is locked and fixed by the locking groove 120. Then, by rotating the driving handle 310, the sealing pressing member 210 is rotated and moved, and finally the first protrusion 211 is moved into the release groove 130, and at the same time, the release groove 130 plays a guiding role, so that the first protrusion 211 moves along the release groove 130 toward the direction close to the explosion-proof valve, and finally the sealing pressing member 210 is against the explosion-proof valve.

[0035] In one embodiment, the driving assembly 300 further includes an elastic member 320 , which is sleeved on the air inlet member 220 , and the elastic member 320 is located between the sealing pressing member 210 and the top wall of the limiting cavity.

[0036] It should be noted that the housing 100 includes a gland 140 and a main body of the housing, the main body of the housing is threadedly connected to the gland 140, and the elastic member 320 is held between the sealing pressing member 210 and the gland 140. By utilizing the elastic force of the elastic member 320, a pressing force is formed on the sealing pressing member 210, so that the sealing pressing member 210 can be closely fitted with the explosion-proof valve, thereby improving the sealing effect. Preferably, the elastic member 320 is a spring.

[0037] In one embodiment, a docking notch 150 is formed at the open end of the housing 100 .

[0038] It should be noted that the explosion-proof valve is conveniently inserted into the snap-fit ​​structure 110 of the housing 100 through the docking notch 150. Specifically, the snap-fit ​​structure 110 is a boss extending toward the center area of ​​the limiting cavity. For example, a snap-fit ​​groove is provided on the explosion-proof valve, and the boss is snapped into the snap-fit ​​groove of the explosion-proof valve, so that the explosion-proof valve and the housing 100 are snap-fitted and fixed to prevent the battery pack airtightness test fixture 10 from falling off; therefore, by providing the docking notch 150, an installation avoidance is formed, so that the housing 100 and the explosion-proof valve can be quickly docked.

[0039] The use process of the battery pack air tightness test fixture 10 is as follows:

[0040] 1. Before using the battery pack air tightness test fixture 10, hold the driving handle 310 and pull it in the direction away from the opening of the shell 100, so that the sealing assembly 200 moves in the direction away from the opening of the shell 100 (at this time, the elastic member 320 sleeved on the air inlet member 220 is compressed and retracted); after the sealing pressing member 210 moves into place, rotate the driving handle 310 so that the first protrusion 211 on the sealing pressing member 210 moves into the locking groove 120, forming a locking limit for the sealing pressing member 210.

[0041] 2. When using the battery pack air tightness test fixture, align the snap-fit ​​structure 110 of the shell 100 with the snap-fit ​​groove on the explosion-proof valve; then rotate the driving handle 310 to move the first protrusion 211 on the sealing pressing member 210 into the release groove 130. At this time, release the driving handle 310, the elastic member 320 recovers and stretches, pushing the sealing pressing member 210 to move toward the explosion-proof valve, and finally making the sealing ring 212 on the sealing pressing member 210 fit tightly with the edge of the explosion-proof valve to form a sealed state.

[0042] 3. Start the inflation test. After the test, follow steps 1 and 2 to quickly assemble and disassemble.

[0043] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery pack air tightness test fixture, characterized in that: include: A shell, wherein a limited cavity is formed in the shell, and an opening is formed at one end of the shell, the opening is communicated with the limited cavity, and a clamping structure is provided on the opening, and the clamping structure is used to fix the shell to the explosion-proof valve on the battery pack; A sealing assembly, the sealing assembly comprising a sealing pressing member and an air inlet member, the sealing pressing member being accommodated in the limiting cavity, one end of the air inlet member being connected to a side of the sealing pressing member away from the opening, and the other end of the air inlet member passing through the shell and communicating with the outside of the shell; and A driving assembly is connected to the sealing assembly, and is used to drive the sealing assembly to move toward or away from the explosion-proof valve.

2. The battery pack air tightness test fixture according to claim 1, characterized in that: A locking groove and a releasing groove are provided on the side wall of the limiting cavity, the locking groove and the releasing groove are connected, and the locking groove and the releasing groove are perpendicular to each other, a first protrusion is provided on the sealing pressing member, when the first protrusion is located in the locking groove, the locking groove is used to lock and fix the sealing pressing member, when the first protrusion is located in the releasing groove, the releasing groove is used to move the sealing pressing member toward the direction of the explosion-proof valve until the sealing pressing member is abutted against the explosion-proof valve.

3. The battery pack air tightness test fixture according to claim 2, characterized in that: An adsorption magnet is arranged on one side of the sealing pressing member facing the explosion-proof valve, and the adsorption magnet is used to control the opening and closing of the explosion-proof valve.

4. The battery pack air tightness test fixture according to claim 2, characterized in that: The driving assembly includes a driving handle, which is arranged on an end of the air inlet member away from the sealing pressing member. The driving handle is used to drive the sealing pressing member to move so that the first protrusion on the sealing pressing member moves between the locking groove and the release groove.

5. The battery pack air tightness test fixture according to claim 4, characterized in that: The driving assembly further comprises an elastic member, wherein the elastic member is sleeved on the air inlet member, and the elastic member is located between the sealing pressing member and the top wall of the limiting cavity.

6. The battery pack air tightness test fixture according to claim 5, characterized in that: The elastic member is a spring.

7. The battery pack air tightness test fixture according to any one of claims 1 to 3, characterized in that: A docking notch is provided at the open end of the shell.

8. The battery pack air tightness test fixture according to any one of claims 1 to 3, characterized in that: A sealing ring is arranged on the side of the sealing pressing member facing the explosion-proof valve, and the sealing ring abuts against the edge of the explosion-proof valve.

9. The battery pack air tightness test fixture according to any one of claims 1 to 3, characterized in that: An air nozzle joint is arranged at one end of the air inlet component away from the sealing pressing component.

10. The battery pack air tightness test fixture according to claim 9, characterized in that: The air intake member is an air intake pipe, and an air intake passage is formed on the air intake pipe.

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