Energy storage battery shell and top cover welding and explosion-proof device sealing pressure resistance detection device

Abstract

The utility model relates to an energy storage battery shell and top cover welding and explosion-proof device sealing pressure resistance detection device which comprises an upper computer monitoring unit arranged outside an explosion-proof water tank, a PLC control system, a pressurizing device and a shell arranged at the inner bottom of the explosion-proof water tank, and the explosion-proof water tank is filled with water; the shell is connected with the pressurizing device through an air supply pipe; the upper computer monitoring unit is matched with the PLC control system to control the pressurizing device to form gases in different forms and under different pressures and convey the gases into the shell, and pressure resistance detection is carried out with the assistance of a bubble method and an overflow method; according to the utility model, sealing pressure resistance detection can be carried out on the shell and the top cover, and the detection accuracy can be improved at the same time.

Description

Technical Field

[0001] The utility model relates to a device for detecting the sealing and pressure resistance of an energy storage battery shell, a top cover welding, and an explosion-proof device, belonging to the technical field of airtightness detection of battery shells. Background Art

[0002] As one of the important carriers for storing electric energy, lithium batteries have the advantages of high energy storage density, large specific energy, long cycle life, and safety, and are widely used in new energy vehicles and energy storage systems, which is of great significance to the development of the new energy industry.

[0003] During the charging and discharging process of the battery, a large amount of mixed gas and high heat will be generated by chemical reactions, causing the battery shell to expand or even explode. Usually, a sealed battery shell and a top cover are set, and an explosion-proof device is set on the battery top cover to prevent battery leakage and explosion. Therefore, it is necessary to conduct a pressure resistance test on the lithium battery to ensure the sealing performance of the battery and the pressure relief and explosion performance of the explosion-proof device. At present, the sealing detection of the battery shell and the top cover mainly focuses on helium + vacuum pumping (20 - 40 Pa) leakage detection, and the explosion pressure of the explosion-proof device is not detected, resulting in a relatively high explosion risk.

[0004] The Chinese patent with the publication number CN216899994U discloses a pressure resistance test device for a lithium battery shell, including an explosion-proof water tank. An installation plate is fixed on the inner side end of the explosion-proof water tank. A first rotating motor is installed on the upper end of the installation plate. The output end of the first rotating motor is connected with a first threaded rod. A sliding seat is threadedly installed on the first threaded rod. A fixing plate is installed at the right end of the sliding seat. A groove is formed on the upper end surface of the fixing plate. A second threaded rod is installed in the groove. A slider is threadedly installed on the second threaded rod. A fixed clamping plate is installed at the upper end of the slider. A lithium battery shell is arranged between the two fixed clamping plates. The output end of an air supply pump is connected with a connecting pipe. A pressure gauge is installed on the connecting pipe. One end of the connecting pipe is connected with a rubber hose, and the other end of the rubber hose is communicated with the liquid injection hole on the lithium battery shell. It does not conduct a pressure resistance test on the battery top cover, and the explosion risk is relatively high. For fixing the battery shell with fixed clamping plates and connecting the top cover liquid injection hole by means of extrusion sealing and pressurization, certain external pressurizing forces will be applied to the battery shell and the top cover liquid injection hole, affecting the accuracy of the shell sealing and pressure resistance detection, and it is impossible to measure the volume change of the battery shell after inflation and vacuum pumping pressurization, and cannot truly reflect the sealing performance of the battery when it expands. Summary of the Utility Model

[0005] In order to overcome the above problems, the utility model provides a device for detecting the sealing and pressure resistance of an energy storage battery shell, a top cover welding, and an explosion-proof device, which can conduct sealing and pressure resistance detection on the shell and the top cover, and improve the detection accuracy at the same time.

[0006] The technical solution of the utility model is as follows:

[0007] An airtightness and pressure resistance detection device for welding a storage battery case and a top cover and a blast-proof device, comprising a host computer monitoring unit, a PLC control system, a pressurizing device arranged outside an explosion-proof water tank, and a case arranged at the bottom inside the explosion-proof water tank. The explosion-proof water tank is filled with water. The case is connected to the pressurizing device through an air supply pipe. The host computer monitoring unit cooperates with the PLC control system to control the pressurizing device to form gases in different forms and pressures and transport them into the case, and cooperate with the bubble method and the overflow method to perform pressure resistance detection.

[0008] Further, the pressurizing device includes a pressure regulating valve, a solenoid valve, and a gas booster pump arranged between the two. The pre-pressurized gas source end and the driving gas access end of the gas booster pump are connected in parallel to an air inlet pipe, and the high-pressure gas output end of the gas booster pump is connected in series with an air outlet pipe. The pressure regulating valve is serially arranged on the driving gas access end. The solenoid valve for controlling gas transmission is serially arranged on the air outlet pipe.

[0009] Further, the host computer monitoring unit is connected to and controls the PLC control system, and the PLC control system is respectively connected to and controls the pressure regulating valve and the solenoid valve.

[0010] Further, pressure transmitters for real-time detecting the pressure value of the flowing-through gas and feeding it back to the PLC control system are arranged on the air inlet pipe, the driving gas access end, and the air outlet pipe on the side far from the high-pressure gas output end of the solenoid valve. The PLC control system feeds back the received pressure value to the host computer monitoring unit in real time for recording.

[0011] Further, a top cover fixedly connected to the case is arranged at the top of the case. An explosion-proof device is arranged in the middle of the top cover. A liquid injection hole penetrating the top cover is arranged on one side of the explosion-proof device. A gas filling nozzle detachably connected to the liquid injection hole is arranged in the liquid injection hole, and the air core end of the gas filling nozzle is arranged outside the case. One end of the air supply pipe is provided with a clip-type air nozzle joint, and the air nozzle joint is fixedly connected to the air core end of the gas filling nozzle. The other end of the air supply pipe is fixedly connected to the port of the air outlet pipe through an air pipe connector. The case is placed at the bottom of the explosion-proof water tank through a cable tie.

[0012] Further, two pairs of fixing rings fixedly connected to the explosion-proof water tank and arranged on both sides of the case are arranged at the bottom of the explosion-proof water tank. The two cable ties are cross-arranged, and the ends of the cable ties are respectively tied to the adjacent fixing rings.

[0013] Further, an overflow port is arranged at the upper part of the explosion-proof water tank, and a measuring cup is arranged below the overflow port.

[0014] Further, a usage method for performing airtightness detection on an airtightness and pressure resistance detection device for welding a storage battery case and a top cover and a blast-proof device:

[0015] S01. Connect the high-pressure gas output end and the liquid injection hole of the housing through the air supply pipe, so that high-pressure gas can be transported into the housing, and place the housing in the explosion-proof water tank filled with water;

[0016] S02. According to different pressure resistance detection purposes, control the PLC control system through the upper computer monitoring unit, so that the PLC control system adjusts the pressure regulating valve and the gas booster pump to transport gases in different forms and pressures into the housing;

[0017] S03. Detect the sealing performance and pressure resistance value of the housing, the connection between the housing and the top cover, and the explosion-proof device through the bubble method. At the same time, the pressure transmitters on the inlet pipe, the driving gas source access end, and the outlet pipe on the side of the solenoid valve away from the high-pressure gas output end detect the pressure value of the flowing gas in real time and feedback it to the PLC control system, and the upper computer monitoring unit records the detection data in real time. Through the measured pressure value and its change trend, conclusions about the housing, the welding of the housing and the top cover, the sealing of the explosion-proof device, and the pressure resistance value are obtained;

[0018] S04. Detect the real-time deformation amount of the housing during the process of slowly pressurizing the housing to the explosion of the explosion-proof device through the overflow method; the pressure transmitters on the inlet pipe, the driving gas source access end, and the outlet pipe on the side of the solenoid valve away from the high-pressure gas output end detect the pressure value of the flowing gas in real time and feedback it to the PLC control system, and the upper computer monitoring unit records the detection data in real time. Through the measured pressure value and its change trend, conclusions about the pressure value, the deformation amount of the housing, and the explosion-proof and pressure-relief explosion pressure value of the explosion-proof device are obtained.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, the air supply pipe solves the problem of sealing and pressurizing the housing through the cooperation of the inflation nozzle and the clamp-type air nozzle joint, avoids transporting gas into the housing under the condition of applying extrusion external force to the housing and the top cover, has good sealing effect, and at the same time prevents the accuracy of the sealing and pressure resistance detection of the housing and the top cover from being reduced due to the influence of extrusion external force.

[0021] 2. Through the cooperation of the upper computer monitoring unit, the PLC control system and the pressurizing device, the utility model enables the gas pressurizing rate to be adjustable, the gas pressurizing method to be selectable, and at the same time realizes the closed-loop control of pressurization. During the pressurization process, the upper computer unit timely records the relationship data between the pressure and time of the battery in the recent pipe, the pre-boosting gas source end, the driving gas source access end, and the housing, which can meet the different requirements for the pressure measurement detection of the lithium battery housing, the welding of the top cover, and the sealing of the explosion-proof device.

[0022] 3. The utility model realizes the detection of the sealing pressure resistance of the lithium battery shell, top cover welding and explosion-proof device, and the deformation amount of the shell during pressurization through an explosion-proof water tank and a measuring cup by using the bubble method and the overflow method, effectively reducing the detection cost. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] Figure 2 is Figure 1 Partial enlarged schematic diagram of part A of

[0025] Figure 3 It is a schematic diagram of the structure of the pressurizing device.

[0026] Figure 4 It is a schematic diagram of the structure of the shell and the top cover.

[0027] Figure 5 Cross-sectional view of the connection relationship between the inflation nozzle and the liquid injection hole.

[0028] The reference numerals in the drawings are represented as:

[0029] 1. Explosion-proof water tank; 11. Fixed ring; 12. Overflow port; 13. Measuring cup; 2. Host computer monitoring unit; 3. PLC control system; 4. Pressurizing device; 41. Pressure regulating valve; 42. Solenoid valve; 43. Gas booster pump; 431. Pre-boost gas source end; 432. Driving gas access end; 433. High-pressure gas output end; 44. Intake pipe; 45. Outlet pipe; 46. Pressure transmitter; 47. Muffler; 5. Shell; 51. Top cover; 52. Explosion-proof device; 53. Liquid injection hole; 54. Inflation nozzle; 55. Gasket; 6. Air supply pipe; 61. Nozzle joint; 62. Pipe connector; 7. Cable tie. Detailed Embodiment

[0030] The following will combine the drawings and specific embodiments to elaborate on the utility model in detail.

[0031] See Figures 1-5 , a detection device for the sealing pressure resistance of the energy storage battery shell, top cover welding and explosion-proof device, including a host computer monitoring unit 2, a PLC control system 3, a pressurizing device 4 arranged outside the explosion-proof water tank 1, and a shell 5 arranged at the inner bottom of the explosion-proof water tank 1. The shell 5 is connected to the pressurizing device 4 through an air supply pipe 6; through the cooperation of the host computer monitoring unit 2 and the PLC control system 3, the pressurizing device 4 is controlled to convey gases of different forms and pressures into the shell 5 to cooperate with different pressure resistance detection purposes. At the same time, the shell 5 is placed in the explosion-proof water tank 1 filled with water through a cable tie 7, facilitating the use of the bubble method and the overflow method to obtain different detection conclusions.

[0032] Further, the pressurizing device 4 includes a pressure regulating valve 41, a solenoid valve 42, and a gas booster pump 43 disposed therebetween; wherein, the pre-pressurization gas source end 431 and the driving gas source access end 432 of the gas booster pump 43 are connected in parallel to the intake pipe 44, and the pressure regulating valve 41 is serially disposed on the driving gas source access end 432.

[0033] As Figure 3 shown by the arrow direction in the figure, the high-pressure gas output end 433 of the gas booster pump 43 is connected in series with the outlet pipe 45. A part of the compressed gas in the intake pipe 44 enters the gas booster pump 43 from the pre-pressurization gas source end 431, and this part of the gas is the pre-pressurization pressure, denoted as P1; another part of the compressed gas in the intake pipe 44 enters the gas booster pump 43 after the pressure is adjusted proportionally by the pressure regulating valve 41, and this part of the gas is the driving gas source pressure, denoted as P2; the gas booster pump 43 can be selected as a 1:N type, where N represents the pressure ratio. The output after pressurization is the high-pressure gas pressure, denoted as P3, and P3 = P1 + N * P2. By controlling the pressure regulating valve 41 to adjust the magnitude of P2, the P3 output for achieving the detection purpose can be obtained; to control the delivery of the high-pressure gas, a solenoid valve 42 for controlling the opening and closing of the delivery channel is serially disposed on the outlet pipe 45.

[0034] Further, the upper computer monitoring unit 2 is connected to and controls the PLC control system 3. The PLC control system 3 is respectively connected to and controls the pressure regulating valve 41 to proportionally adjust the magnitude of the pressure of the compressed gas, and the solenoid valve 42 to open and close the high-pressure gas delivery channel; wherein, pressure transmitters 46 for real-time detecting the pressure value of the gas flowing through and feeding it back to the PLC control system (3) are serially disposed on the intake pipe 44, the driving gas source access end 432, and the outlet pipe 45 on the side of the solenoid valve 42 away from the high-pressure gas output end 433. After receiving the measured pressure value, the PLC control system 3 feeds it back to the upper computer monitoring unit 2 for real-time recording.

[0035] By connecting the upper computer monitoring unit 2 to and controlling the PLC control system 3, the PLC control system 3 controls the delivery of the gas, and at the same time adjusts the pressure regulating valve 41 and the solenoid valve 42 according to different pressure resistance detection purposes to output various forms of gas such as pulsed, linear, non-linear, and stepped-up pressurization, so as to cooperate with the pressure resistance detection of the housing 5 for different purposes; a muffler 47 can be serially disposed on the pre-pressurization gas source end 431 to reduce the noise generated when delivering high-pressure gas.

[0036] Further, a top cover 51 is provided at the top of the housing 5 and is fixedly connected thereto. An explosion-proof device 52 is provided in the middle of the top cover 51. A liquid injection hole 53 penetrating the top cover 51 is provided on one side of the explosion-proof device 52; an inflation nozzle 54 is detachably connected to the liquid injection hole 53. Among them, the detachable connection method can be an inflation nozzle 54 with external threads provided on its outer circumference. After a gasket 55 and the liquid injection hole 53 are sequentially screwed onto the external thread section of the inflation nozzle 54 and then locked, the effect of fixing the inflation nozzle 54 and sealing the liquid injection hole 53 is achieved through the gasket 55. At this time, the air core end of the inflation nozzle 54 is placed outside the housing 5. The detachable connection method can also be snap connection, screw connection, etc.; one end of the air supply pipe 6 is provided with a clip-type air nozzle joint 61, and the air nozzle joint 61 is fixedly connected to the air core end of the inflation nozzle 54. The other end of the air supply pipe 6 is fixedly connected to the port of the air outlet pipe 45 through an air pipe connector 62. The fixing connection method can also be screw fastening, etc.

[0037] Further, two pairs of fixing rings 11 fixedly connected to the bottom of the explosion-proof water tank 1 and disposed on both sides of the housing 5 are provided. Two cable ties 7 are cross-set, and the ends of the cable ties 7 are respectively connected to the adjacent fixing rings 11, so as to fix the position of the housing 5.

[0038] By fixing the position of the housing 5 with the cable tie 7 and through the cooperation of the inflation nozzle 54, the air nozzle joint 61, the air supply pipe 6, the air pipe connector 62, and the air outlet pipe 45, gas is transported into the housing 5 while avoiding applying extrusion external force to the housing 5 and the top cover 51. Moreover, the sealing effect is good, and it also prevents the sealing and pressure resistance detection of the housing 5 from being affected by the extrusion external force and reducing the accuracy.

[0039] Further, an overflow port 12 is opened in the upper part of the explosion-proof water tank 1, and a measuring cup 13 is provided below the overflow port 12; when the housing 5 deforms due to pressurization, the water level in the water surface rises, and water overflows from the overflow port 12 and flows into the measuring cup 13. Then, the deformation amount of the housing 5 can be obtained through the volume of water in the measuring cup 13.

[0040] Further, a method for sealing and pressure resistance detection of a storage battery housing, top cover welding, and explosion-proof device includes the following steps:

[0041] S01. Connect the high-pressure gas output end 433 and the liquid injection hole 53 through the air supply pipe 6, so that high-pressure gas can be transported into the housing 5, and place the housing 5 in the explosion-proof water tank 1 filled with water;

[0042] S02. According to different pressure resistance detection purposes, control the PLC control system 3 through the upper computer monitoring unit 2, so that the PLC control system 3 adjusts the pressure regulating valve 41 and the gas booster pump 43 to transport gases in different forms and pressures into the housing 5;

[0043] S03. Detect the sealing performance and pressure resistance value of the housing 5, the connection between the housing 5 and the top cover 51, and the explosion-proof device through the bubble method. At the same time, the pressure transmitter 46 on the intake pipe 44, the driving gas source access end 432, and the outlet pipe 45 on the side of the solenoid valve 42 away from the high-pressure gas output end 433 detects the pressure data of the flowing gas in real time and feeds it back to the PLC control system 3, and the upper computer monitoring unit 2 records the detection data in real time. Through the measured pressure data and its change trend, conclusions about the sealing performance and pressure resistance value of the housing 5, the connection between the housing 5 and the top cover 51, and the explosion-proof device 52 are obtained;

[0044] S04. Detect the real-time deformation amount of the housing 5 during the process of slowly pressurizing the housing 5 to cause the explosion-proof device 52 to explode through the overflow method; the pressure transmitter 46 on the intake pipe 44, the driving gas source access end 433, and the outlet pipe 45 on the side of the solenoid valve 42 away from the high-pressure gas output end 432 detects the pressure value of the flowing gas in real time and feeds it back to the PLC control system 3, and the upper computer monitoring unit 2 records the detection data in real time. Through the measured pressure value and its change trend, conclusions about the pressure value, the deformation amount of the housing 5, and the explosion-proof pressure relief explosion pressure value of the explosion-proof device 52 are obtained.

[0045] The working principle of the present utility model:

[0046] See Figures 1-5 , the present utility model is applicable to the sealing and pressure resistance detection of lithium battery housings. The present utility model connects and controls the PLC control system 3 through the upper computer monitoring unit 2, and the PLC control system 3 respectively connects and controls the pressure regulating valve 41, the solenoid valve 42, and the pressure transmitter 46.

[0047] Compressed gas is input from the intake pipe 44, output from the outlet pipe 45 after being pressurized by the pressurizing device 4, and the outlet pipe 45 is connected to the liquid injection hole 53 of the housing 5 through the air delivery pipe 6. During detection, the housing 5 is placed in the explosion-proof water tank 1 filled with water, and the housing 5 is fixed at the bottom of the explosion-proof water tank 1 by tying two mutually crossed tie straps 7 with adjacent fixing rings 11 to prevent the housing 5 from floating up and down and ensure the reliability of the detection.

[0048] Input gases of different forms and pressures into the housing 5 according to the detection purpose:

[0049] Detection of the sealing performance and pressure resistance value of the housing 5, the connection between the housing 5 and the top cover 51, and the explosion-proof device 52: The host computer monitoring unit 2 opens the solenoid valve 42 through the PLC control system 3 to connect the high-pressure gas transmission channel, and controls the pressure regulating valve 41 to adjust the pressure of the compressed gas flowing through the driving gas source access end 432 in proportion according to the set pressure value and pressurization rate; The compressed gas in the pre-boost gas source end 431 and the compressed gas after pressure regulation at the driving gas source access end 432 enter the gas booster pump 43 for boosting to form high-pressure gas, which is transported into the housing 5; At the same time, the pressure transmitters 46 on the intake pipe 44, the driving gas source access end 432, and the outlet pipe 45 on the side of the solenoid valve 42 away from the high-pressure gas output end 433 detect the pressure data of the flowing gas in real time and feedback it to the PLC control system 3. The host computer monitoring unit 2 records the detection data in real time, and at the same time observes whether there are bubbles escaping from the housing 5, the connection between the housing 5 and the top cover 51, and the explosion-proof device 52 in the explosion-proof water tank 1 through the bubble method, and obtains the conclusion of the sealing performance and pressure resistance value of the housing 5, the connection between the housing 5 and the top cover 51, and the explosion-proof device 52 according to the measured pressure data and its change trend.

[0050] Detection of the real-time deformation amount of the housing 5 and the explosion pressure value of the explosion-proof device 52 during the process of slowly pressurizing the housing 5 until the explosion-proof device 52 explodes: During the process of transporting high-pressure gas into the housing 5, the pressure transmitters 46 on the intake pipe 44, the driving gas source access end 432, and the outlet pipe 45 on the side of the solenoid valve 42 away from the high-pressure gas output end 433 detect the pressure value of the flowing gas in real time and feedback it to the PLC control system 3, and the host computer monitoring unit 2 records the detection data in real time. Through the measured pressure value and its change trend, the real-time deformation amount of the housing 5 is obtained; When continuously transporting high-pressure gas of different forms and pressures into the housing 5 until the explosion-proof device 52 explodes for pressure relief, the explosion pressure value of the explosion-proof device 52 during explosion-proof pressure relief is obtained by comparing the measured pressure data and its change trend of each pressure transmitter 46. At the same time, the deformation amount of the housing 5 at different pressures is measured according to the volume of water flowing from the overflow port 12 of the explosion-proof water tank 1 into the measuring cup 13.

[0051] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A device for detecting the sealing and pressure resistance of an energy storage battery housing, a top cover welding device, and an explosion-proof device, comprising a host computer monitoring unit (2) arranged outside an explosion-proof water tank (1), a PLC control system (3), a pressurizing device (4), and a housing (5) arranged at the bottom of the explosion-proof water tank (1), wherein the explosion-proof water tank (1) is filled with water, and is characterized in that: The shell (5) is connected to the pressurizing device (4) via an air supply pipe (6); the upper computer monitoring unit (2) cooperates with the PLC control system (3) to control the pressurizing device (4) to form gas in different forms and pressures and to deliver the gas to the shell (5), and to perform pressure resistance testing in combination with a bubble method and an overflow method.

2. The energy storage battery housing, top cover welding, explosion-proof device sealing pressure detection device according to claim 1, characterized in that: The pressurizing device (4) comprises a pressure regulating valve (41), a solenoid valve (42) and a gas booster pump (43) arranged therebetween; a pre-pressurization gas source end (431) and a driving gas source access end (432) of the gas booster pump (43) are connected in parallel to an air inlet pipe (44), and a high-pressure gas output end (433) of the gas booster pump (43) is connected in series to an air outlet pipe (45); the pressure regulating valve (41) is connected in series to the driving gas source access end (432); and a solenoid valve (42) for controlling gas delivery is connected in series to the air outlet pipe (45).

3. The energy storage battery housing, top cover welding, explosion-proof device sealing pressure detection device according to claim 2, characterized in that: The upper computer monitoring unit (2) is connected to and controls the PLC control system (3), and the PLC control system (3) is respectively connected to and controls the pressure regulating valve (41) and the solenoid valve (42).

4. The energy storage battery housing, top cover welding, explosion-proof device sealing pressure resistance detection device according to claim 3, characterized in that: The air inlet pipe (44), the drive air source access end (432), and the air outlet pipe (45) on the side of the solenoid valve (42) away from the high-pressure gas output end (433) are all provided with a pressure transmitter (46) for real-time detection of the pressure value of the gas flowing through and feeding it back to the PLC control system (3); the PLC control system (3) feeds back the received pressure value to the host computer monitoring unit (2) in real time for recording.

5. A storage battery housing, top cover welding, explosion-proof device sealing pressure detection device according to claim 2 or 4, characterized in that: The top of the shell (5) is provided with a top cover (51) fixedly connected thereto, the middle of the top cover (51) is provided with an explosion-proof device (52), and one side of the explosion-proof device (52) is provided with a liquid injection hole (53) penetrating the top cover (51); an air filling nozzle (54) detachably connected thereto is provided in the liquid injection hole (53), and the air core end of the air filling nozzle (54) is placed outside the shell (5); one end of the air supply pipe (6) is provided with a clamp-type air nozzle joint (61), the air nozzle joint (61) is fixedly connected to the air core end of the air supply pipe (54), and the other end of the air supply pipe (6) is fixedly connected to the port of the air outlet pipe (45) through an air pipe connector (62); the shell (5) is placed at the bottom of the explosion-proof water tank (1) through a cable tie (7).

6. The energy storage battery housing, top cover welding, explosion-proof device sealing pressure resistance detection device according to claim 5, characterized in that: The bottom of the explosion-proof water tank (1) is provided with two pairs of fixing rings (11) fixedly connected thereto and disposed on both sides of the shell (5); the two cable ties (7) are arranged crosswise and the ends of the cable ties (7) are respectively tied to adjacent fixing rings (11).

7. The energy storage battery housing, top cover welding, explosion-proof device sealing pressure detection device according to claim 6, characterized in that: An overflow port (12) is provided on the upper portion of the explosion-proof water tank (1), and a measuring cup (13) is provided below the overflow port (12).

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