Thermal runaway testing device for high-capacity energy storage lithium battery

Abstract

The utility model relates to the field of lithium battery testing, and discloses a thermal runaway testing device for a large-capacity energy storage lithium battery, which comprises a cylinder body, a cabin body gear ring is fixed on the outer wall of one end of the cylinder body, an inflatable air bag is arranged in the cabin body gear ring, a mounting frame is fixed on the outer wall of the cabin body gear ring, and the inflatable air bag is arranged in the mounting frame. A rotating arm is rotatably arranged on the inner wall of the mounting frame, the rotating arm is composed of a supporting arm, a rotating disc, a first gear, a rotating column and a supporting column, the supporting arm is rotatably arranged on the inner wall of the mounting frame, the rotating disc is arranged on the left side of the supporting arm, and one end of a rotating shaft of the rotating disc penetrates through the supporting arm. According to the utility model, through the matching of the cabin body gear ring and the cabin door gear ring, after the cabin door body is rotationally meshed through the rotating arm, high-pressure compressed air can be introduced into the safety air bag, and the air bag expands to extrude the cabin body sealing surface and the cabin door body sealing surface, so that the cabin body and the cabin door body are connected and sealed, and 3Mpa impact pressure can be borne without leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing, in particular to a thermal runaway testing device for a lithium battery for large-capacity energy storage. Background Art

[0002] The lithium battery thermal runaway test device is a device specially used to evaluate and test the safety performance of lithium batteries under extreme conditions (such as overheating, overcharging, short circuit, etc.). Lithium batteries explode quickly, release huge energy instantly, and release a variety of toxic and harmful gases. Therefore, when conducting experiments in a sealed environment, the pressure-resistant tank must be designed according to the process of explosion shock pressurization.

[0003] Since the actual explosion energy is related to the number and capacity of batteries, most current tests have collected explosion pressures of between 1 and 2 MPa. Therefore, the existing experimental chambers can only withstand limited pressures and cannot accurately test the performance of lithium batteries, making it impossible to ensure that the batteries will not cause fires or explosions under abnormal conditions, thereby reducing the effectiveness of lithium batteries. Utility Model Content

[0004] The purpose of the utility model is to provide a thermal runaway test device for a large-capacity lithium battery for energy storage, so as to solve the problem that the pressure that the existing experimental cabin can withstand is limited, and the performance of the lithium battery cannot be accurately tested, so it cannot be ensured whether the battery will cause a fire or explosion under abnormal conditions, thereby reducing the use effect of the lithium battery.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a thermal runaway test device for a lithium battery for large-capacity energy storage, comprising a cylinder, a cabin gear ring is fixed to the outer wall of one end of the cylinder, an inflatable airbag is arranged inside the cabin gear ring, a mounting frame is fixed to the outer wall of the cabin gear ring, a rotating arm is rotatably arranged on the inner wall of the mounting frame, the rotating arm is composed of a support arm, a turntable, a first gear, a rotating column, and a support column, the support arm is rotatably arranged on the inner wall of the mounting frame, the turntable is arranged on the left side of the support arm, one end of the turntable rotating shaft passes through the support arm, the first gear is fixed to one end of the turntable rotating shaft, the rotating column is rotatably arranged on the other side of the support arm, the support column is fixed to the bottom surface of the mounting frame, and an elliptical gear is fixed to the other end of the cylinder. A round head, a door body is arranged on the right side of the cabin body gear ring, the door body is composed of a protective door, a door gear ring and a second gear, the protective door is arranged on the left side of the rotating arm, the door gear ring is fixed to the outer wall of the protective door, the door gear ring is meshed with the cabin body gear ring, the second gear is fixed to the outer wall of the protective door, the second gear is meshed with the first gear, the outer wall of the protective door is provided with two mounting holes, the inner wall of the mounting hole is fixed with an observation window, the outer wall of the cylinder is provided with a pipe port, the outer wall of the cabin body gear ring is fixed with a sealing ring inflation interface, the sealing ring inflation interface is connected with an inflatable airbag, the outer wall of the cabin body gear ring is fixed with an interlocking port, when the door body is closed, the inflatable airbag can seal the connection between the cabin body and the door body, so as to improve the sealing inside the cabin.

[0006] Preferably, the pipeline port is composed of an exhaust interface, a pressure test interface, a pressure relief valve interface, a vacuum test interface, a vacuum interface, an air intake interface, a sampling interface, an oxygen monitoring interface, a temperature interface, a voltage interface, and a spare interface. The exhaust interface, the pressure test interface, the pressure relief valve interface, the vacuum test interface, the vacuum interface, the air intake interface, the sampling interface, the oxygen monitoring interface, the temperature interface, the voltage interface, and the spare interface are all arranged on the outer wall of the cylinder and are connected with the internal cavity of the cylinder. The pipeline port can be installed with a variety of detection devices, so that the staff can actually control the internal data of the cylinder.

[0007] Preferably, two support frames are fixed to the outer wall of the cylinder, a box is arranged below the cylinder, the support frames are threadedly connected to the top surface of the box via bolts, the bottom ends of the support columns are threadedly connected to the top surface of the box via bolts, and the box can protect the control instrument to prevent the control instrument from being exposed to the outside and being damaged by collision with external forces, thereby ensuring the safety of the control instrument and, at the same time, ensuring the normal operation of the controller instrument.

[0008] Preferably, a vacuum pump and an electric control board are provided inside the box body, and the electric control board can control the vacuum pump, the solenoid valve, and the high-pressure hose, thereby realizing automatic control of the vacuum operation of the cabin body.

[0009] Preferably, one of the two observation windows is provided with a lighting lamp, which can improve the visibility of the environment inside the cylinder so that the experiment can still be carried out in a dim environment. At the same time, it is convenient for the staff to observe and record the experimental data more intuitively, thereby assisting the background data to accurately evaluate the experiment, thereby improving the accuracy of the experimental data.

[0010] Preferably, the inner diameter of the cylinder is 600 mm, and the length of the straight pipe section is 1000 mm.

[0011] Compared with the prior art, a thermal runaway test device for a large-capacity lithium battery for energy storage using the above technical solution has the following beneficial effects:

[0012] 1. Through the cooperation between the cabin body gear ring and the hatch door gear ring, after the hatch door body is rotated and meshed through the rotating arm, high-pressure compressed air can be introduced into the safety airbag, and the airbag expands to squeeze the cabin body sealing surface and the hatch door body sealing surface, so as to achieve the connection and sealing between the cabin body and the hatch door body, which can withstand the impact pressure of 3Mpa without leakage. At the same time, through the safety interlock cylinder on the cabin body, after the hatch door gear ring is meshed, the airbag is inflated and sealed, and the interlock cylinder is also inflated to lock the hatch door body to prevent it from swinging open, so as to ensure that the hatch door body is accidentally opened and injures people when there is pressure in the cabin;

[0013] 2. Through the exhaust interface, under the action of the high-pressure ball valve control switch, the exhaust gas can be discharged after the test and replaced with fresh air in conjunction with the air intake interface. Through the pressure relief valve interface, the pressure in the cabin can be relieved under the action of the pressure relief valve. When the pressure in the cabin exceeds 2 MPa, it can automatically open to discharge the high-pressure gas in the cabin, and automatically close when the pressure in the cabin is lower than 2 MPa. It is used for experimental protection to prevent accidental gas overpressure from causing harm to the cabin and personnel. Through the air intake interface, under the automatic control of the pipeline solenoid valve, the air purge to update the gas in the tank and the nitrogen filling function can be completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional schematic diagram of an embodiment;

[0015] Figure 2 It is a front view schematic diagram of an embodiment;

[0016] Figure 3 It is a right side schematic diagram of an embodiment;

[0017] Figure 4 A schematic top view of an embodiment;

[0018] Figure 5 is a rear view schematic diagram of an embodiment;

[0019] Figure 6 For example Figure 3 Enlarged schematic diagram at point A in the middle.

[0020] In the figure: 1. Cylinder; 2. Cabin gear ring; 3. Mounting frame; 4. Rotating arm; 401. Support arm; 402. Turntable; 403. First gear; 404. Rotating column; 405. Support column; 5. Elliptical head; 6. Cabin door body; 601. Protective door; 602. Cabin door gear ring; 603. Second gear; 7. Mounting hole; 8. Observation window; 9. Pipe port; 901. Exhaust interface; 902. Pressure test interface; 903. Pressure relief valve interface; 904. Vacuum test interface; 905. Vacuum interface; 906. Air intake interface; 907. Sampling interface; 908. Oxygen monitoring interface; 909. Temperature interface; 910. Voltage interface; 911. Spare interface; 10. Sealing ring inflation interface; 11. Support frame; 12. Box; 13. Interlocking port. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 6 As shown, a thermal runaway test device for a lithium battery for large-capacity energy storage comprises a cylinder 1, characterized in that a cabin gear ring 2 is fixed to the outer wall at one end of the cylinder 1, an inflatable airbag is arranged inside the cabin gear ring 2, a mounting frame 3 is fixed to the outer wall of the cabin gear ring 2, a rotating arm 4 is rotatably arranged on the inner wall of the mounting frame 3, the rotating arm 4 is composed of a support arm 401, a turntable 402, a first gear 403, a rotating column 404, and a support column 405, the support arm 401 is rotatably arranged on the inner wall of the mounting frame 3, the turntable 402 is arranged on the left side of the support arm 401, one end of the rotating shaft of the turntable 402 passes through the support arm 401, the first gear 403 is fixed to one end of the rotating shaft of the turntable 402, the rotating column 404 is rotatably arranged on the other side of the support arm 401, the support column 405 is fixed to the bottom surface of the mounting frame 3, and the other end of the cylinder 1 is fixed There is an elliptical head 5, and a door body 6 is arranged on the right side of the cabin body gear ring 2. The door body 6 is composed of a protective door 601, a door gear ring 602, and a second gear 603. The protective door 601 is arranged on the left side of the rotating arm 4, and the door gear ring 602 is fixed to the outer wall of the protective door 601, and the door gear ring 602 is meshed with the cabin body gear ring 2. The second gear 603 is fixed to the outer wall of the protective door 601, and the second gear 603 is meshed with the first gear 403. The outer wall of the protective door 601 is provided with two mounting holes 7, and the inner wall of the mounting hole 7 is fixed with an observation window 8. The outer wall of the cylinder 1 is provided with a pipe port 9, and the outer wall of the cabin body gear ring 2 is fixed with a sealing ring inflation interface 10, which is connected to the inflatable airbag, and the outer wall of the cabin body gear ring 2 is fixed with an interlocking port 13. The inner diameter of the cylinder 1 is 600mm, and the straight pipe section is 1000mm long.

[0023] During use, through the cooperation between the cabin body gear ring 2 and the cabin door gear ring 602, after the cabin door body 6 is rotated and engaged through the rotating arm 4, high-pressure compressed air is introduced into the airbag, and the airbag expands and squeezes the cabin body sealing surface and the door body 6 sealing surface, thereby realizing the connection and sealing between the cabin body and the door body 6, which can withstand the impact pressure of 3Mpa without leakage. At the same time, through the safety interlock cylinder on the cabin body, after the cabin door gear ring 602 is engaged, the airbag is inflated and sealed, and the interlock cylinder is also inflated to lock the door body 6 to prevent it from swinging open, thereby ensuring that the door body 6 is accidentally opened and injures people when there is pressure in the cabin.

[0024] like Figure 1-Figure 5 As shown, the pipeline port 9 is composed of an exhaust interface 901, a pressure test interface 902, a pressure relief valve interface 903, a vacuum test interface 904, a vacuum interface 905, an air intake interface 906, a sampling interface 907, an oxygen monitoring interface 908, a temperature interface 909, a voltage interface 910, and a spare interface 911. The exhaust interface 901, the pressure test interface 902, the pressure relief valve interface 903, the vacuum test interface 904, the vacuum interface 905, the air intake interface 906, the sampling interface 907, the oxygen monitoring interface 908, the temperature interface 909, the voltage interface 910, and the spare interface 911 are all arranged on the outer wall of the cylinder 1 and are connected with the internal cavity of the cylinder 1.

[0025] During use, the exhaust port 901 can be linked with the air intake port 906 under the action of the high-pressure ball valve control switch to complete the exhaust gas after the test and replace it with fresh air. The pressure relief valve port 903 can be used to relieve the pressure in the cabin under the action of the pressure relief valve. When the pressure in the cabin exceeds 2 MPa, it can automatically open to discharge the high-pressure gas in the cabin, and automatically close when the pressure in the cabin is lower than 2 MPa. It is used for experimental protection to prevent accidental gas overpressure from causing damage to the cabin and personnel. The air intake port 906 can be automatically controlled by the pipeline solenoid valve to complete the air purge to update the gas in the tank and the nitrogen filling function.

[0026] like Figure 1-Figure 6 As shown, two support frames 11 are fixed to the outer wall of the cylinder 1, a box 12 is arranged below the cylinder 1, the support frames 11 are connected to the top surface of the box 12 by bolt threads, the bottom end of the support column 405 is connected to the top surface of the box 12 by bolt threads, and a vacuum pump and an electric control panel are arranged inside the box 12.

[0027] During use, the box 12 can protect the control instrument to prevent the control instrument from being exposed to the outside and being damaged by external force, thereby ensuring the safety of the control instrument and ensuring the normal operation of the controller instrument. The vacuum pump, solenoid valve, and high-pressure hose can be controlled by the electric control panel to realize the automatic control of the cabin vacuum operation.

[0028] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, one of the two observation windows 8 is provided with an illumination lamp.

[0029] During use, the visibility of the environment inside the cylinder 1 can be improved by the lighting, so that experiments can still be carried out in a dim environment. At the same time, it is convenient for staff to observe and record experimental data more intuitively, thereby assisting the background data to accurately evaluate the experiment, thereby improving the accuracy of the experimental data.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thermal runaway test device for a large-capacity lithium battery for energy storage, comprising a cylinder (1), characterized in that: A cabin gear ring (2) is fixed to the outer wall of one end of the cylinder (1), an inflatable airbag is arranged inside the cabin gear ring (2), a mounting frame (3) is fixed to the outer wall of the cabin gear ring (2), a rotating arm (4) is rotatably arranged on the inner wall of the mounting frame (3), the rotating arm (4) is composed of a support arm (401), a rotating disk (402), a first gear (403), a rotating column (404), and a support column (405), the support arm (401) is rotatably arranged The rotating disc (402) is disposed on the inner wall of the mounting frame (3), the rotating disc (402) is disposed on the left side of the supporting arm (401), one end of the rotating shaft of the rotating disc (402) passes through the supporting arm (401), the first gear (403) is fixed to one end of the rotating shaft of the rotating disc (402), the rotating column (404) is rotatably disposed on the other side of the supporting arm (401), the supporting column (405) is fixed to the bottom surface of the mounting frame (3), and an elliptical head (5) is fixed to the other end of the cylinder (1); A door body (6) is arranged on the right side of the cabin body gear ring (2), and the door body (6) is composed of a protective door (601), a door gear ring (602), and a second gear (603). The protective door (601) is arranged on the left side of the rotating arm (4), and the door gear ring (602) is fixed to the outer wall of the protective door (601). The door gear ring (602) is meshed with the cabin body gear ring (2), and the second gear (603) is fixed to the outer wall of the protective door (601). The second gear (603) is meshed with the first gear (403), the outer wall of the protective door (601) is provided with two mounting holes (7), the inner wall of the mounting hole (7) is fixed with an observation window (8), the outer wall of the cylinder (1) is provided with a pipe opening (9), the outer wall of the cabin gear ring (2) is fixed with a sealing ring inflation interface (10), the sealing ring inflation interface (10) is connected to the inflatable airbag, and the outer wall of the cabin gear ring (2) is fixed with an interlocking port (13).

2. A thermal runaway test device for a large-capacity lithium battery for energy storage according to claim 1, characterized in that: The pipeline port (9) is composed of an exhaust interface (901), a pressure test interface (902), a pressure relief valve interface (903), a vacuum test interface (904), a vacuum interface (905), an air intake interface (906), a sampling interface (907), an oxygen monitoring interface (908), a temperature interface (909), a voltage interface (910), and a spare interface (911); the exhaust interface (901), the pressure test interface (902), the pressure relief valve interface (903), the vacuum test interface (904), the vacuum interface (905), the air intake interface (906), the sampling interface (907), the oxygen monitoring interface (908), the temperature interface (909), the voltage interface (910), and the spare interface (911) are all arranged on the outer wall of the cylinder (1) and are in communication with the internal cavity of the cylinder (1).

3. A thermal runaway test device for a large-capacity lithium battery for energy storage according to claim 2, characterized in that: Two support frames (11) are fixed to the outer wall of the cylinder (1), a box (12) is arranged below the cylinder (1), the support frames (11) are threadedly connected to the top surface of the box (12) via bolts, and the bottom end of the support column (405) is threadedly connected to the top surface of the box (12) via bolts.

4. A thermal runaway test device for a large-capacity lithium battery for energy storage according to claim 3, characterized in that: A vacuum pump and an electric control panel are arranged inside the box (12).

5. A thermal runaway test device for a large-capacity lithium battery for energy storage according to claim 1, characterized in that: One of the two observation windows (8) is provided with an illumination lamp.

6. A thermal runaway test device for a large-capacity lithium battery for energy storage according to claim 1, characterized in that: The inner diameter of the cylinder (1) is 600 mm, and the length of the straight pipe section is 1000 mm.

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