Lithium battery pressing test equipment

Abstract

The utility model discloses lithium battery pressure test equipment, which belongs to the technical field of lithium battery pressure test and comprises an explosion-proof box, lifting grooves are arranged on two sides in the explosion-proof box, screws are arranged in the lifting grooves, synchronous motors are arranged at the tops of the screws, sliders are arranged in the middles of the screws, and a lifting frame is arranged in the explosion-proof box. A groove is formed in the middle of the lifting frame, a fixed clamping plate is arranged on one side of the interior of the groove, a movable clamping plate is arranged on the other side of the interior of the groove, a connecting rod is arranged on the top of the movable clamping plate, one end of the lifting frame is arranged in a sliding groove, a handle is arranged on the top of the connecting rod, and a reset spring is arranged in the sliding groove. The lifting frame is driven to ascend and descend, the lithium battery is clamped and fixed through the fixed clamping plate, the movable clamping plate, the telescopic rod, the telescopic sleeve and the clamping spring, the stability of the lithium battery is guaranteed, the lithium battery can be directly fixed above the water surface during installation, underwater clamping operation is not needed, and the portability of lithium battery installation is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery pressure testing, and particularly relates to lithium battery pressure testing equipment. Background Art

[0002] During the assembly process of cylindrical lithium batteries, the shell and the cover plate are generally welded together by laser welding to ensure the sealing of the battery. Since certain internal pressure will be generated during the charge and discharge process of the lithium battery, if the welding strength between the battery shell and the cover plate is insufficient, air leakage and liquid leakage may occur, affecting the cycle life of the battery, and even causing fire and explosion, posing a great safety hazard.

[0003] According to the lithium battery pressure testing equipment disclosed in the patent number CN201921855160.9, it includes an explosion-proof box. A horizontally arranged rotating shaft is rotatably connected inside the explosion-proof box. A first screw rod and a second screw rod are coaxially fixed to the rotating shaft. The first screw rod and the second screw rod have opposite helix directions. A first nut is threadedly connected to the first screw rod, and a second nut is threadedly connected to the second screw rod. A first support rod is fixed to the lower end of the first nut, a first claw is fixed to the right end of the first support rod, a second support rod is fixed to the lower end of the second nut, a second claw is fixed to the left end of the second support rod. An empty battery is installed between the first claw and the second claw. The first claw and the second claw are symmetric about the middle position of the explosion-proof box. A liquid injection hole is provided at the front end of the empty battery. A nitrogen tank is installed on the left side of the explosion-proof box, and the nitrogen tank is connected to the liquid injection hole through a pipeline.

[0004] In the actual use process of the above solution, there are still certain technical defects. Since it does not have a lifting function, after the catheter is connected to the liquid injection hole, it needs to be manually placed in water and kept stable, and can only be released after the first claw and the second claw are stably clamped. This greatly reduces the convenience of the test, and it is rather troublesome to disassemble and assemble the lithium battery. Therefore, we propose the lithium battery pressure testing equipment. Content of the Utility Model

[0005] The purpose of the utility model is to provide lithium battery pressure testing equipment to solve the problems presented in the above background art.

[0006] To achieve the above object, the utility model provides the following technical solutions: a lithium battery pressure test device, including an explosion-proof box, a lifting frame and a movable clamping plate. Water is installed at the bottom end inside the explosion-proof box. Lifting grooves are provided on the inner walls of both sides at the top end inside the explosion-proof box. A screw rod is vertically arranged inside the lifting groove through a bearing. A synchronous motor is installed at the top of the screw rod. A slider is spirally connected to the middle of the screw rod. A lifting frame is arranged inside the explosion-proof box. Both ends of the lifting frame are fixedly connected to the two sliders respectively. A groove is provided in the middle of the lifting frame. A fixed clamping plate is arranged at the bottom end on one side inside the groove. A movable clamping plate is arranged at the bottom end on the other side inside the groove. Arc-shaped grooves are provided on the opposite sides of the movable clamping plate and the fixed clamping plate. An L-shaped connecting rod is arranged at the top of the movable clamping plate. A sliding groove is provided at the top end of one end of the lifting frame. The connecting rod extends into the sliding groove and is slidably connected to its inner wall. A handle is arranged at one end of the top of the connecting rod. The handle passes through the sliding groove and extends to the outside. A return spring is arranged inside the sliding groove.

[0007] Preferably, a telescopic rod is arranged on the other side of the movable clamping plate. A telescopic sleeve is fixedly embedded on the inner wall of the groove close to the movable clamping plate. A clamping spring is arranged inside the telescopic sleeve.

[0008] Preferably, a nitrogen tank is arranged on one side outside the explosion-proof box. The top of the nitrogen tank extends into the explosion-proof box through a conduit and is hermetically connected to the liquid injection port on the lithium battery inside through threads. A pressure valve is arranged at one end of the conduit close to the nitrogen tank.

[0009] Preferably, a box cover is arranged on the top of the explosion-proof box. One side of the bottom of the box cover is movably connected to the explosion-proof box through a hinge. The other side of the bottom of the box cover is magnetically connected through an electro-suction plate.

[0010] Preferably, observation windows are arranged in the middle of the box cover and on one side outside the explosion-proof box. The observation windows are made of double-layer explosion-proof glass.

[0011] Preferably, a control panel is arranged on one side outside the explosion-proof box. The control panel is fixedly installed on one side outside the explosion-proof box by means of inlaying.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. By arranging a lifting frame inside the explosion-proof box, using the screw rod, synchronous motor and slider in cooperation to drive the lifting of the lifting frame, and clamping and fixing the lithium battery through the fixed clamping plate, movable clamping plate, telescopic rod, telescopic sleeve and clamping spring to ensure its stability, so that during installation, it can be directly fixed above the water surface without underwater clamping operation, greatly improving the portability of installing the lithium battery.

[0014] 2. By setting a chute at the top of the lifting frame and a return spring inside it, and using an L-shaped connecting rod to fixedly connect the grip and the movable clamping plate, when toggling the movable clamping plate to open and close, the grip can be directly pulled, improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the multi-angle structure of the present invention;

[0017] Figure 3 is a schematic diagram of the structure of the lifting frame of the present invention;

[0018] Figure 4 is a schematic diagram of the structure of the movable clamping plate of the present invention.

[0019] In the figure: 1, explosion-proof box; 2, box cover; 3, lifting groove; 4, screw; 5, synchronous motor; 6, lifting frame; 7, slider; 8, groove; 9, fixed clamping plate; 10, movable clamping plate; 11, connecting rod; 12, grip; 13, return spring; 14, telescopic sleeve; 15, clamping spring; 16, telescopic rod; 17, nitrogen tank; 18, pressure valve; 19, control panel; 20, observation window. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4, the present utility model provides a technical solution for a lithium battery pressure testing device: including an explosion-proof box 1, a lifting frame 6 and a movable clamping plate 10. Water is installed at the inner bottom end of the explosion-proof box 1. Lifting grooves 3 are opened on both inner wall sides at the top end of the explosion-proof box 1. A screw rod 4 is vertically arranged in the lifting groove 3 through a bearing. A synchronous motor 5 is installed at the top of the screw rod 4. A slider 7 is helically connected to the middle of the screw rod 4. A lifting frame 6 is arranged inside the explosion-proof box 1. Both ends of the lifting frame 6 are fixedly connected to the two sliders 7 respectively. A groove 8 is opened in the middle of the lifting frame 6. A fixed clamping plate 9 is arranged at the bottom end of one side inside the groove 8. A movable clamping plate 10 is arranged at the bottom end of the other side inside the groove 8. Arc-shaped grooves are opened on the opposite sides of the movable clamping plate 10 and the fixed clamping plate 9. An L-shaped connecting rod 11 is arranged at the top of the movable clamping plate 10. A sliding groove is opened at the top end of one side of the lifting frame 6. The connecting rod 11 extends into the sliding groove and is slidably connected to its inner wall. One end at the top of the connecting rod 11 is provided with a handle 12. The handle 12 passes through the sliding groove and extends to the outside. A return spring 13 is arranged inside the sliding groove.

[0022] Specifically, a telescopic rod 16 is arranged on the other side of the movable clamping plate 10. A telescopic sleeve 14 is fixedly embedded on the inner wall of the groove 8 close to the movable clamping plate 10. A clamping spring 15 is arranged inside the telescopic sleeve 14.

[0023] Specifically, a nitrogen tank 17 is arranged on one side outside the explosion-proof box 1. The top of the nitrogen tank 17 extends into the explosion-proof box 1 through a conduit and is hermetically connected to the liquid injection port on the lithium battery inside it through threads. A pressure valve 18 is arranged at one end of the conduit close to the nitrogen tank 17.

[0024] Specifically, a box cover 2 is arranged on the top of the explosion-proof box 1. One side at the bottom of the box cover 2 is movably connected to the explosion-proof box 1 through a hinge. The other side at the bottom of the box cover 2 is connected by an electro-suction plate in a magnetic attraction manner.

[0025] Specifically, observation windows 20 are arranged in the middle of the box cover 2 and on one side outside the explosion-proof box 1. The observation windows 20 are made of double-layer explosion-proof glass material.

[0026] Specifically, a control panel 19 is arranged on one side outside the explosion-proof box 1. The control panel 19 is fixedly installed on one side outside the explosion-proof box 1 by means of inlaying.

[0027] In this embodiment, when performing a pressure test on a lithium battery, the box cover 2 is opened, and the screw rod 4 is rotated by the synchronous motor 5, causing the slider 7 to rise to the top of the lifting groove 3, thereby driving the lifting frame 6 to rise above the water surface. Then, the grip 12 is pulled to move the connecting rod 11 inwardly into the sliding groove, causing the connecting rod 11 to drive the movable clamping plate 10 to move towards the inner wall of the groove 8, separating the movable clamping plate 10 from the fixed clamping plate 9. At this time, the telescopic rod 16 contracts into the telescopic sleeve 14, and both the return spring 13 and the clamping spring 15 are compressed. Then, the lithium battery to be tested is placed in the arc-shaped groove of the fixed clamping plate 9, and the grip 12 is released. Under the restoring elastic force of the return spring 13 and the clamping spring 15, the connecting rod 11 and the movable clamping plate 10 are pushed back to their original positions, causing the movable clamping plate 10 and the fixed clamping plate 9 to stably clamp the lithium battery to be tested. Next, the conduit connected to the nitrogen gas cylinder 17 is connected to the liquid injection hole of the lithium battery. Then, the synchronous motor 5 is controlled to rotate in the reverse direction to drive the lifting frame 6 to move downward below the water surface to observe whether it is sealed. After confirming the seal, the box cover 2 is closed, and pressure is applied to the inside of the lithium battery through the pressure valve 18, and relevant data is detected by an external pressure gauge to achieve the test of the lithium battery.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Lithium battery pressing test equipment, including an explosion-proof box (1), a lifting frame (6) and a movable clamping plate (10), characterized in that: The inner bottom end of the explosion-proof box (1) is filled with water. On both inner side walls at the top end of the explosion-proof box (1), lifting grooves (3) are provided. Inside the lifting grooves (3), a screw rod (4) is vertically arranged through bearings. At the top of the screw rod (4), a synchronous motor (5) is installed. In the middle of the screw rod (4), a slider (7) is spirally connected. Inside the explosion-proof box (1), a lifting frame (6) is provided. Both ends of the lifting frame (6) are fixedly connected to the two sliders (7) respectively. In the middle of the lifting frame (6), a groove (8) is provided. At the bottom end of one side inside the groove (8), a fixed clamping plate (9) is provided. At the bottom end of the other side inside the groove (8), a movable clamping plate (10) is provided. Arc-shaped grooves are provided on the opposite sides of the movable clamping plate (10) and the fixed clamping plate (9). At the top of the movable clamping plate (10), an L-shaped connecting rod (11) is provided. At the top of one end of the lifting frame (6), a sliding groove is provided. The connecting rod (11) extends into the inside of the sliding groove and is slidably connected to its inner wall. At one end of the top of the connecting rod (11), a handle (12) is provided. The handle (12) passes through the sliding groove and extends to the outside. Inside the sliding groove, a return spring (13) is provided.

2. The lithium battery pressing test device according to claim 1, wherein: On the other side of the movable clamping plate (10), a telescopic rod (16) is provided. Inside the inner wall of the groove (8) close to the movable clamping plate (10), a telescopic sleeve (14) is fixedly inlaid. Inside the telescopic sleeve (14), a clamping spring (15) is provided.

3. The lithium battery pressing test device according to claim 1, wherein: On one side of the outside of the explosion-proof box (1), a nitrogen tank (17) is provided. The top of the nitrogen tank (17) extends into the inside of the explosion-proof box (1) through a conduit and is hermetically connected in a threaded manner to the liquid injection port on the lithium battery inside it. At one end of the conduit close to the nitrogen tank (17), a pressure valve (18) is provided.

4. The lithium battery pressing test device according to claim 1, characterized in that: On the top of the explosion-proof box (1), a box cover (2) is provided. One side of the bottom of the box cover (2) is movably connected to the explosion-proof box (1) through a hinge. The other side of the bottom of the box cover (2) is connected in a magnetic attraction manner through an electro-magnetic suction plate.

5. The lithium battery pressing test device according to claim 4, wherein: Observation windows (20) are provided in the middle of the box cover (2) and on one side of the outside of the explosion-proof box (1). The observation windows (20) are made of double-layer explosion-proof glass material.

6. The lithium battery pressing test device according to claim 1, wherein: On one side of the outside of the explosion-proof box (1), a control panel (19) is provided. The control panel (19) is fixedly installed on one side of the outside of the explosion-proof box (1) by means of inlaying.

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