Detection testing machine for battery extrusion test

Abstract

The utility model provides a detection testing machine for a battery extrusion test, a pressure applying device is electrically connected with a control device, a movable rod is arranged on the pressure applying device, and a pressing plate is arranged at the lower end of the movable rod; a test piece placing plate is arranged below the pressing plate; a pressure relief mechanism is arranged on the protection box and comprises a pressure relief opening formed in the protection box and a pressure relief plate corresponding to the pressure relief opening, the pressure relief plate is located on the outer side of the protection box, a guide column is arranged on the pressure relief plate, a guide hole corresponding to the guide column is formed in the protection box, and the guide column penetrates through the guide hole. Spring limiting ends are arranged at the ends, away from the pressure relief plate, of the guide columns, and springs are arranged between the spring limiting ends and the inner wall of the protection box; and a filter screen is arranged between the pressure relief plate and the protection box. According to the battery protection box, explosion in the protection box can be subjected to pressure relief through the pressure relief mechanism arranged on the protection box, internal pressure caused by battery explosion to the protection box is reduced, and therefore deformation and damage of the protection box are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a detection test machine used for battery extrusion testing. Background Art

[0002] As a device for storing energy, batteries are used more and more frequently in people's daily lives and have become an indispensable item in life. Of course, the safety performance requirements for batteries are also high. Battery extrusion test is one of the important assessment items for battery safety performance indicators. Currently, the common battery extrusion test device includes a protective box, which is equipped with a test piece placement plate. A pressure device is provided above the test piece placement plate. During the test, the test piece (battery) is placed on the test piece placement plate, and then the box door on the protective box is closed. The pressure plate on the pressure device presses the battery and applies a certain test pressure to the battery. After the test pressure is applied, if the battery does not explode, leak or catch fire, the battery meets industry standards and has a high safety.

[0003] During the test, there is a certain chance that unqualified batteries will explode. Since the entire test is carried out in a relatively closed protective box, and the traditional protective box does not have a pressure relief function, when the battery explodes, the pressure in the protective box will increase sharply, causing deformation and damage to the protective box. Summary of the invention

[0004] The utility model aims to solve the deficiencies in the prior art and provide a detection test machine for battery extrusion testing.

[0005] The purpose of the utility model is achieved through the following technical solutions: a detection test machine for battery extrusion test, including a protection box, a control device, a fixed crossbeam is provided in the protection box, a pressure device is provided on the fixed crossbeam, and the pressure device is electrically connected to the control device; a movable rod is provided on the pressure device, and a pressure plate is provided at the lower end of the movable rod; a test piece placement plate is provided below the pressure plate;

[0006] A pressure relief mechanism is provided on the protective box, and the pressure relief mechanism includes a pressure relief port arranged on the protective box, a pressure relief plate corresponding to the pressure relief port, the pressure relief plate is located on the outside of the protective box, a guide column is provided on the pressure relief plate, and a guide hole corresponding to the guide column is provided on the protective box. The guide column passes through the guide hole, and a spring limiting end is provided at one end of the guide column away from the pressure relief plate, and a spring is provided between the spring limiting end and the inner wall of the protective box; a filter net is provided between the pressure relief plate and the protective box, and the filter net is ring-shaped, one end of the filter net is fixed to the periphery of the pressure relief port, and one end of the filter net is connected to the pressure relief plate.

[0007] Preferably, a pressure sensor is provided between the movable rod and the pressure plate, and the pressure sensor is electrically connected to the control device.

[0008] Preferably, the pressure sensor is a strain gauge pressure sensor.

[0009] Preferably, the pressure-applying device is an electric cylinder.

[0010] Preferably, a sealing ring is provided on one side of the pressure relief plate close to the protection box.

[0011] Preferably, a positioning pin is provided at the lower end of the test piece placement plate, and a positioning hole matching the positioning pin is provided on the protective box.

[0012] The beneficial effect of the utility model is that in the utility model, the explosion in the protection box can be relieved by the pressure relief mechanism arranged on the protection box, thereby reducing the internal pressure of the protection box caused by the battery explosion, thereby avoiding deformation and damage of the protection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the utility model when the pressure relief plate is in a closed state.

[0014] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0015] Figure 3 It is a schematic diagram of the pressure relief plate in the utility model when it is in an open state.

[0016] In the figure: 1. protective box, 2. control device, 3. box door, 4. fixed beam, 5. lifting drive component, 7. movable rod, 8. pressure sensor, 9. pressure plate, 10. test piece placement plate, 11. positioning hole, 12. positioning pin, 14. pressure relief port, 15. pressure relief plate, 16. guide column, 17. spring limit end, 18. spring, 19. filter screen, 20. sealing ring. DETAILED DESCRIPTION

[0017] 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 in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0018] like Figures 1 to 3As shown, a testing machine for battery extrusion test includes a protective box 1 and a control device 2. The protective box 1 is connected to a box door 3 that can be opened or closed. The control device 2 is arranged on the top of the outer side of the protective box 1. The control device 2 is a single-chip microcomputer. A fixed beam 4 is arranged in the protective box 1, and a pressure device is arranged on the fixed beam 4. The pressure device is provided with a movable rod 7, and the movable rod 7 is arranged along the vertical direction. In this embodiment, the pressure device is an electric cylinder, and the control device 2 controls the movable rod 7 on the electric cylinder to move.

[0019] A pressing plate 9 is provided at the lower end of the movable rod 7, and a pressure sensor 8 is provided between the pressing plate 9 and the movable rod 7. The pressure sensor 8 is electrically connected to the control device 2, and the pressure sensor 8 is used to detect the pressure applied by the pressing plate 9 to the test piece (battery). In this embodiment, the pressure sensor 8 is a strain gauge pressure sensor 8.

[0020] A test piece placement plate 10 is provided below the pressure plate 9. The test piece placement plate 10 is used to place the test piece (battery). The test piece placement plate 10 is detachably connected to the protective box 1. A positioning pin 12 is provided at the lower end of the test piece placement plate 10, and a positioning hole 11 matching the positioning pin 12 is provided on the protective box 1. When the test piece placement plate 10 is installed in the protective box 1, the pin on the test piece placement plate 10 is inserted into the positioning hole 11; when the test piece placement plate 10 needs to be removed, the pin only needs to be pulled out of the positioning hole 11. This connection method facilitates the installation and replacement of the test piece placement plate 10.

[0021] The protective box 1 is provided with a pressure relief mechanism, which includes a pressure relief port 14 provided on the protective box 1, and a pressure relief plate 15 corresponding to the pressure relief port 14, the pressure relief plate 15 is located outside the protective box 1, and the area of ​​the pressure relief plate 15 is larger than the area of ​​the pressure relief port 14. The pressure relief plate 15 is provided with a guide column 16, which is fixedly arranged on the side of the pressure relief plate 15 close to the protective box 1, and the guide column 16 is perpendicular to the pressure relief plate 15. The protective box 1 is provided with guide holes corresponding to the guide columns 16, and the guide holes are located on both sides of the pressure relief port 14. The guide columns 16 pass through the guide holes, and the guide columns 16 can slide in the guide holes.

[0022] A spring stopper 17 is provided at one end of the guide column 16 away from the pressure relief plate 15, and a spring 18 is provided between the spring stopper 17 and the inner wall of the protection box 1, and the spring 18 is sleeved on the guide column 16. A filter screen 19 is provided between the pressure relief plate 15 and the protection box 1, and the filter screen 19 is annular, and one end of the filter screen 19 is fixed to the periphery of the pressure relief port 14, and one end of the filter screen 19 is connected to the pressure relief plate 15.

[0023] A sealing ring 20 is provided on one side of the pressure relief plate 15 close to the protection box 1. The sealing ring 20 is made of rubber.

[0024] Under normal circumstances, the pressure relief plate 15 is in a closed state under the action of the spring 18 (such as Figure 1 As shown in the figure, the pressure relief plate 15 seals the pressure relief port 14, and the sealing ring 20 on the pressure relief plate 15 contacts the periphery of the pressure relief port 14. When the test piece (battery) explodes during the test, the explosion causes the internal pressure of the protection box 1 to increase sharply, which will push the pressure relief plate 15 toward the outside of the protection box 1, so that the pressure relief plate 15 is in an open state (as shown in the figure). Figure 2 As shown in the figure, when the pressure relief plate 15 is opened, the pressure inside the protective box 1 is relieved, and the filter screen 19 arranged between the pressure relief plate 15 and the protective box 1 can prevent the battery fragments produced by the explosion from splashing outward and causing harm to the surrounding personnel; when the pressure in the protective box 1 drops, the pressure relief plate 15 returns to the closed state again under the action of the spring 18.

[0025] In the utility model, the explosion in the protection box 1 can be relieved by the pressure relief mechanism provided on the protection box 1 , thereby reducing the internal pressure of the protection box 1 caused by the battery explosion, thereby avoiding deformation and damage of the protection box 1 .

[0026] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A testing machine for battery extrusion testing, characterized in that: It includes a protection box and a control device. A fixed crossbeam is provided in the protection box. A pressure device is provided on the fixed crossbeam. The pressure device is electrically connected to the control device. A movable rod is provided on the pressure device. A pressure plate is provided at the lower end of the movable rod. A test piece placement plate is provided below the pressure plate. A pressure relief mechanism is provided on the protective box, and the pressure relief mechanism includes a pressure relief port arranged on the protective box, a pressure relief plate corresponding to the pressure relief port, the pressure relief plate is located on the outside of the protective box, a guide column is provided on the pressure relief plate, and a guide hole corresponding to the guide column is provided on the protective box. The guide column passes through the guide hole, and a spring limiting end is provided at one end of the guide column away from the pressure relief plate, and a spring is provided between the spring limiting end and the inner wall of the protective box; a filter net is provided between the pressure relief plate and the protective box, and the filter net is ring-shaped, one end of the filter net is fixed to the periphery of the pressure relief port, and one end of the filter net is connected to the pressure relief plate.

2. A testing machine for battery extrusion testing according to claim 1, characterized in that: A pressure sensor is provided between the movable rod and the pressure plate, and the pressure sensor is electrically connected to the control device.

3. A testing machine for battery extrusion testing according to claim 2, characterized in that: The pressure sensor is a strain gauge pressure sensor.

4. A testing machine for battery extrusion testing according to claim 1, characterized in that: The pressure applying device is an electric cylinder.

5. The detection test machine for battery extrusion test according to claim 1, characterized in that: A sealing ring is provided on one side of the pressure relief plate close to the protection box.

6. A testing machine for battery extrusion testing according to claim 1, characterized in that: A positioning pin is provided at the lower end of the test piece placement plate, and a positioning hole matched with the positioning pin is provided on the protection box.

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