Explosion-proof pressure detection device for lithium battery cap

Abstract

The utility model discloses an explosion-proof pressure detection device for a lithium battery cap, and relates to the technical field of lithium battery cap testing. The device comprises a top plate and a test plate located right below the top plate. A sealing plate is arranged between the top plate and the testing plate, a testing opening is formed in the middle of the upper end face of the testing plate, a screw opening communicated with the interior of the testing opening is formed in the lower end face of the testing plate, a placing ring is fixed to the inner side wall of the testing opening, a high-pressure pump is fixed to the upper end face of the sealing plate, and an outer screw plate is spirally arranged in the screw opening; a plurality of movable holes in an annular array are formed in the upper end face of the outer screw plate, movable rods are slidably arranged in the movable holes, linkage heads are fixed to the upper end faces of the movable rods, and a hydraulic cylinder is fixed to the upper end face of the top plate. According to the utility model, the high-pressure pump and the hydraulic cylinder are matched for use, rapid testing of the lithium battery cap is realized, and meanwhile, the linkage head is connected with the bottom surface of the lithium battery cap, so that the explosion-proof pressure testing condition can be observed at the first time.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery cap testing, in particular to an explosion-proof pressure detection device for a lithium battery cap. Background Art

[0002] Lithium battery is a kind of battery that uses lithium metal or lithium alloy as positive / negative electrode material and non-aqueous electrolyte solution. The lithium battery cap is a key component of the lithium battery. It is installed on the positive electrode of the lithium battery and directly connected to the pole ear. During the production of lithium battery caps, the lithium battery caps will be randomly inspected, so it is necessary to use corresponding explosion-proof pressure detection devices.

[0003] However, when the existing explosion-proof pressure detection device is used to detect the lithium battery cap, it is not capable of quickly performing explosion-proof pressure detection on the lithium battery cap, which will affect the efficiency of random inspection. At the same time, the device used cannot observe the explosion-proof pressure test situation in the first time during the detection, which will affect the data recording. To this end, we provide a lithium battery cap explosion-proof pressure detection device to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a lithium battery cap explosion-proof pressure detection device, which realizes rapid testing of the lithium battery cap by using a high-pressure pump and a hydraulic cylinder, and connects a linkage head with the bottom surface of the lithium battery cap, so that the explosion-proof pressure test situation can be observed at the first time.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses an explosion-proof pressure detection device for a lithium battery cap, comprising a top plate and a test plate located directly below the top plate; a sealing plate is arranged between the top plate and the test plate, a test port is arranged at the middle position of the upper end surface of the test plate, a screw port connected to the inside of the test port is arranged at the lower end surface of the test plate, a placing ring is fixed to the inner side wall of the test port, a high-pressure pump is fixed to the upper end surface of the sealing plate, an outer screw plate is spirally arranged inside the screw port, a plurality of movable holes in an annular array are arranged on the upper end surface of the outer screw plate, movable rods are slidably arranged inside the movable holes, a linkage head is fixed to the upper end surface of the movable rod, and a hydraulic cylinder is fixed to the upper end surface of the top plate.

[0007] The utility model is further configured such that positioning rods fixedly connected to the upper end surface of the test plate are fixed at the four corners of the lower end surface of the top plate, and the sealing plate is sleeved on the positioning rods through positioning holes opened at the four corners.

[0008] The utility model is further configured that the positioning rods between the sealing plate and the test plate are sleeved with reset springs, and the upper and lower end surfaces of the reset springs are fixed with gaskets sleeved on the positioning rods.

[0009] The utility model is further configured such that a sealing cylinder which is plugged into the test port and has the same inner diameter as the gasket ring is fixed on the lower end face of the sealing plate, a pump port of the high-pressure pump is connected to the interior of the sealing cylinder, and a sealing ring is fixed on the upper end face of the test plate.

[0010] The utility model is further configured that a swivel is arranged just below the outer screw plate, and vertical poles are fixed at four diagonal positions of the lower end surface of the test plate.

[0011] The utility model is further configured such that a plurality of connecting rods evenly distributed in an annular shape are fixed between the rotating ring and the outer screw plate, a plurality of movable holes are located between the plurality of connecting rods, and a toggle cloth fixedly connected to the side wall of the connecting rod is provided between the outer screw plate and the rotating ring.

[0012] The utility model is further configured that a round block is fixed on the lower end surface of the movable rod passing through the movable hole, and an extrusion spring connected to the upper end surface of the outer screw plate is fixed on the lower end surface of the linkage head.

[0013] The utility model has the following beneficial effects:

[0014] Place the lithium battery cap into the test port so that the lithium battery cap is above the placement ring. At this time, the sealing plate and the test plate are pushed together by the hydraulic cylinder to make the inside of the test port sealed. At this time, the high-pressure pump is controlled to pressurize the inside of the test port. By gradually pressurizing, rapid testing can be achieved.

[0015] When the lithium battery cap is deformed, the convex pushes the linkage head, causing the linkage head to push the corresponding movable rod downward, so that the lithium battery cap can be promptly determined to have burst, and the test work can be stopped immediately. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The figure is a schematic diagram of the structure of a lithium battery cap explosion-proof pressure detection device.

[0018] Figure 2 It is a structural diagram of the test plate and the outer screw plate in the utility model.

[0019] Figure 3 It is a structural combination diagram of the outer screw plate and the linkage head in the utility model.

[0020] Figure 4It is the structural diagram of the outer spiral plate in the utility model.

[0021] Figure 5 It is a structural diagram of the test board in the utility model.

[0022] Figure 6 It is a structural diagram of the sealing plate in the utility model.

[0023] Figure 7 It is a structural diagram of the return spring in the utility model.

[0024] Figure 8 It is a structural diagram of the linkage joint in the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-top plate, 101-hydraulic cylinder, 102-positioning rod, 2-sealing plate, 201-high pressure pump, 202-sealing cylinder, 203-positioning hole, 3-reset spring, 301-gasket, 4-test plate, 401-vertical pole, 402-test port, 403-sealing ring, 404-placing ring, 405-screw mouth, 5-external screw plate, 501-swivel ring, 502-connecting rod, 503-movable hole, 504-sliding cloth, 6-linkage head, 601-movable rod, 602-extrusion spring, 603-round block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0028] See also Figures 1 to 8 The utility model is a lithium battery cap explosion-proof pressure detection device, which realizes rapid testing of the lithium battery cap by using a high-pressure pump 201 and a hydraulic cylinder 101. At the same time, the linkage head 6 is connected to the bottom surface of the lithium battery cap, so that the explosion-proof pressure test situation can be observed at the first time.

[0029] Specifically, a top plate 1 and a test plate 4 located directly below the top plate 1; a sealing plate 2 is arranged between the top plate 1 and the test plate 4, a test port 402 is provided at the middle position of the upper end surface of the test plate 4, a screw port 405 connected to the inside of the test port 402 is provided on the lower end surface of the test plate 4, a placement ring 404 is fixed to the inner side wall of the test port 402, a high-pressure pump 201 is fixed to the upper end surface of the sealing plate 2, an outer screw plate 5 is spirally arranged inside the screw port 405, a plurality of movable holes 503 in a ring array are arranged on the upper end surface of the outer screw plate 5, movable rods 601 are slidably arranged inside the movable holes 503, a linkage head 6 is fixed to the upper end surface of the movable rod 601, and a hydraulic cylinder 101 is fixed to the upper end surface of the top plate 1.

[0030] The operation process of this embodiment is as follows: through the setting and use of the above-mentioned structure, the lithium battery cap is placed into the test port 402, so that the lithium battery cap is located above the placement ring 404. At this time, the sealing plate 2 and the test plate 4 are pushed to connect by the hydraulic cylinder 101, so that the interior of the test port 402 is sealed. At this time, the high-pressure pump 201 is controlled to pressurize the interior of the test port 402. By gradually increasing the pressure, when the lithium battery cap is deformed, the convex push generated by it pushes the linkage head 6, so that the linkage head 6 pushes the corresponding movable rod 601 downward, so that the lithium battery cap can be determined in time if it has burst, and the test work can be stopped immediately. Example 2

[0031] See also Figure 6 and Figure 7 On the basis of Example 1, the sealing plate 2 is directly pushed upward by the reset spring 3 to facilitate the removal and placement of the lithium battery cap.

[0032] Specifically, positioning rods 102 fixedly connected to the upper end surface of the test plate 4 are fixed at the four corners of the lower end surface of the top plate 1, the sealing plate 2 is sleeved on the positioning rods 102 through positioning holes 203 opened at the four end corners, and the positioning rods 102 between the sealing plate 2 and the test plate 4 are sleeved with reset springs 3, and the upper and lower end surfaces of the reset springs 3 are fixed with gaskets 301 sleeved on the positioning rods 102, the lower end surface of the sealing plate 2 is fixed with a sealing tube 202 that is inserted into the test port 402 and has the same inner diameter as the gasket 301, the pump port of the high-pressure pump 201 is connected to the interior of the sealing tube 202, and the upper end surface of the test plate 4 is fixed with a sealing ring 403.

[0033] The operation process of this embodiment is as follows: after the sealing plate 2 moves downward, it will squeeze the sealing ring 403, so as to seal the gap between the sealing plate 2 and the test plate 4. At the same time, when the sealing plate 2 moves downward, the sealing plate 2 will slide downward along the positioning rod 102 through the positioning hole 203 and compress the reset spring 3. Therefore, after the control liquid level cylinder is reset, the reset spring 3 will directly push the sealing plate 2 to reset upward, which is convenient for taking and placing the lithium battery cap. At the same time, the sealing cylinder 202 will move with the sealing plate 2, so that the sealing cylinder 202 will abut against the upper end surface of the lithium battery cap, so that the lithium battery cap and the placement ring 404 are squeezed and sealed. Example 3

[0034] See also Figure 3 , Figure 4 and Figure 8 On the basis of Example 1, the protrusion of the cloth 504 is moved to facilitate observation by the staff.

[0035] Specifically, a swivel 501 is provided directly below the outer screw plate 5, and vertical poles 401 are fixed at the four diagonal positions of the lower end surface of the test plate 4. A plurality of connecting rods 502 evenly distributed in a ring shape are fixed between the swivel 501 and the outer screw plate 5, and a plurality of movable holes 503 are located between the plurality of connecting rods 502. A toggle cloth 504 fixedly connected to the side wall of the connecting rod 502 is provided between the outer screw plate 5 and the swivel 501. A movable rod 601 passes through the lower end surface of the movable hole 503 and is fixed with a round block 603. The lower end surface of the linkage head 6 is fixed with an extrusion spring 602 connected to the upper end surface of the outer screw plate 5.

[0036] The operation process of this embodiment is as follows: after the linkage head 6 is pushed, the linkage head 6 will drive the movable rod 601 to move downward inside the movable hole 503, and will compress the extrusion spring 602. At the same time, the movable rod 601 pushes the moving cloth 504, and the protrusion of the moving cloth 504 is convenient for the staff to observe. After the lithium battery cap is taken out, the linkage head 6 is no longer pushed at this time, so the extrusion spring 602 pushes the linkage head 6 to reset.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A lithium battery cap explosion-proof pressure detection device, comprising a top plate (1) and a test plate (4) located directly below the top plate (1); characterized in that: A sealing plate (2) is arranged between the top plate (1) and the test plate (4); a test port (402) is provided at the middle of the upper end surface of the test plate (4); a screw port (405) connected to the inside of the test port (402) is provided at the lower end surface of the test plate (4); a placement ring (404) is fixed to the inner wall of the test port (402); a high-pressure pump (201) is fixed to the upper end surface of the sealing plate (2); an outer screw plate (5) is spirally arranged inside the screw port (405); a plurality of movable holes (503) in a ring array are provided on the upper end surface of the outer screw plate (5); movable rods (601) are slidably arranged inside the movable holes (503); a linkage head (6) is fixed to the upper end surface of the movable rod (601); and a hydraulic cylinder (101) is fixed to the upper end surface of the top plate (1).

2. A lithium battery cap explosion-proof pressure detection device according to claim 1, characterized in that: Positioning rods (102) fixedly connected to the upper end surface of the test plate (4) are fixed at the four corners of the lower end surface of the top plate (1), and the sealing plate (2) is sleeved on the positioning rods (102) through positioning holes (203) provided at the four corners.

3. A lithium battery cap explosion-proof pressure detection device according to claim 2, characterized in that: A return spring (3) is sleeved on the positioning rod (102) between the sealing plate (2) and the test plate (4), and a gasket (301) sleeved on the positioning rod (102) is fixed to the upper and lower end surfaces of the return spring (3).

4. A lithium battery cap explosion-proof pressure detection device according to claim 3, characterized in that: A sealing cylinder (202) inserted into the test port (402) and having an inner diameter consistent with that of the gasket (301) is fixed to the lower end surface of the sealing plate (2); a pump port of the high-pressure pump (201) is connected to the interior of the sealing cylinder (202); and a sealing ring (403) is fixed to the upper end surface of the testing plate (4).

5. The lithium battery cap explosion-proof pressure detection device according to claim 1, characterized in that: A rotating ring (501) is provided directly below the outer screw plate (5), and vertical poles (401) are fixed at four diagonal positions on the lower end surface of the test plate (4).

6. A lithium battery cap explosion-proof pressure detection device according to claim 5, characterized in that: A plurality of connecting rods (502) evenly distributed in an annular shape are fixed between the rotating ring (501) and the outer screw plate (5); the plurality of movable holes (503) are located between the plurality of connecting rods (502); and a shifting cloth (504) fixedly connected to the side wall of the connecting rod (502) is provided between the outer screw plate (5) and the rotating ring (501).

7. A lithium battery cap explosion-proof pressure detection device according to claim 6, characterized in that: A round block (603) is fixed to the lower end surface of the movable rod (601) passing through the movable hole (503), and a compression spring (602) connected to the upper end surface of the outer screw plate (5) is fixed to the lower end surface of the linkage head (6).

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