An airtight detection device and method for the upper cover of a battery

Abstract

The present invention relates to the technical field of flow detection, and discloses an airtight detection device and method for a battery upper cover. The airtight detection device for the battery upper cover includes: an airtight detector, in which a stamping detection member integrating a stamping chamber is provided in the detection area. The stamping detection member includes leak detection components distributed around the four corners of a single battery station to be measured, and an identification component provided at the bottom of the stamping chamber; the leak detection component includes four groups of air detection heads distributed in a rectangular array. In the inner cavity of each air detection head, a suspended shaking spring member is provided through magnetic levitation. Two groups of symmetrically distributed conductive sheets are provided between the shaking spring member and the inner wall of the air detection head; the identification component includes a multi-color lamp ring. When the stamping chamber is sealed and pressurized, the leaked gas drives the shaking spring member to deflect and contact the first group of conductive sheets to trigger a monochromatic light signal. During the pressure relief stage, it deflects in the opposite direction and contacts the second group of conductive sheets to switch the color of the light signal, and false judgment is excluded through two-way contact verification. In the present invention, during the stage of sealing and pressurizing the stamping chamber, the leaked gas drives the shaking spring member to contact the first group of conductive sheets to trigger a monochromatic early warning.

Description

Technical Field

[0001] The present invention relates to the field of flow detection, and more specifically, it relates to an airtight detection device and method for a battery upper cover. Background Art

[0002] As a core component of military pulse power supplies, the reliability of thermal batteries directly affects the combat effectiveness of weapon systems. Thermal batteries activate the lithium metal negative electrode through molten salt electrolytes, instantaneously releasing megajoule-level energy and are widely used in weapon systems such as missiles, torpedoes, and fuzes. Their airtight upper covers need to withstand high temperatures (≥500°C), high impacts (>10,000g), and complex electromagnetic environments for a long time. Airtightness failure will lead to electrolyte leakage, causing energy attenuation and even the risk of thermal runaway.

[0003] Current airtight detection methods mainly include pressure boost detection, differential pressure detection, and helium leak detection methods, etc. Although these methods can detect leaks, they have deficiencies in detection accuracy, false positive rate, and adaptability to complex environments. Traditional methods may not be able to accurately detect tiny leak points and are prone to false positives. For this reason, we propose an airtight detection device and method for a battery upper cover. Summary of the Invention

[0004] The present invention provides an airtight detection device and method for a battery upper cover, which solves the technical problems of deficiencies in false positive rate and adaptability to complex environments in related technologies. Traditional methods may not be able to accurately detect tiny leak points and are prone to false positives.

[0005] In a first aspect of the present invention, an airtight detection device for a battery upper cover is provided, including: an airtight detector, in which a stamping detection member with an integrated stamping chamber is provided in the detection area. The stamping detection member includes leak detection components distributed around the four corners of a single battery station to be measured, and an identification component provided at the bottom of the stamping chamber;

[0006] The leak detection component includes four groups of air detection heads distributed in a rectangular array. In the inner cavity of each air detection head, a suspended shaking spring member is provided through magnetic levitation. Two groups of symmetrically distributed conductive sheets are provided between the shaking spring member and the inner wall of the air detection head;

[0007] The identification component includes a multi-color lamp ring. When the stamping chamber is sealed and pressurized, the leaked gas drives the shaking spring member to deflect and contact the first group of conductive sheets to trigger a monochromatic light signal. During the pressure relief stage, it deflects in the opposite direction and contacts the second group of conductive sheets to switch the color of the light signal, and false positives are excluded through two-way contact verification.

[0008] Further, a lifting plate is fixedly connected to the lid of the stamping chamber, and the lifting plate moves up and down with the hydraulic telescopic arm on the frame of the airtight detector.

[0009] Further, a plurality of gas filling pipes are provided on the lower wall of the stamping chamber. A multi-way pipe is provided at one end of the plurality of gas filling pipes away from the stamping chamber, and an air pump member is provided at the gas supply end of the multi-way pipe. The multi-way pipe is in communication with the inside of the stamping chamber.

[0010] Further, a discharge air pipe is fixedly provided on one side of the stamping chamber cover. One end of the discharge air pipe away from the stamping chamber cover is fixedly connected to a discharge air valve. Both the discharge air valve and the air pump member connected to the multi-way pipe are connected to the intelligent control end.

[0011] Further, the identification component further includes a battery ring, and a plurality of battery rings are provided. The plurality of battery rings are all fixedly arranged in an array on the inner bottom of the stamping chamber. The diameter of the battery ring is larger than the diameter of the thermal battery. One thermal battery is placed in each battery ring, and the diameter of the battery ring gradually decreases from top to bottom.

[0012] Further, the multi-color lamp ring is inlaid on the inclined surface of the battery ring. The light projection range of the multi-color lamp ring is upward at the center of the circle. A plurality of turntables are further provided on the inclined surface of the battery ring. The turntables are rotationally connected to the battery ring. The multi-color lamp ring is connected to the intelligent control end.

[0013] Further, the leak detection component further includes a control box. A plurality of control boxes are provided and are all fixed on the cover of the stamping chamber. Each control box corresponds to an identification component. A pressure sensor is fixedly provided on the lower wall of the control box.

[0014] Further, the shaking spring member further includes a limiting plate fixed to its top end. A magnetic ball is fixedly provided above the limiting plate. A second magnetic plate is provided between the magnetic ball and the limiting plate. A first magnetic plate is provided above the magnetic ball. Both the first magnetic plate and the second magnetic plate are fixedly connected to the inner wall of the gas detection head. The first magnetic plate and the second magnetic plate surround the magnetic ball, and at the same time, the first magnetic plate, the second magnetic plate and the magnetic ball do not contact each other.

[0015] Further, a gas detection balloon is fixedly provided at the bottom end of the shaking spring member. A plurality of circulation grooves are provided on one side of the gas detection balloon close to the center of the battery.

[0016] The second aspect of the present invention provides a method for using a battery upper cover airtight detection device, including the following steps:

[0017] S1. Place the thermal battery to be tested into the battery ring. The hydraulic telescopic arm drives the lifting plate to descend, so that the stamping chamber cover is sealed, and the gas detection balloon is accurately positioned at the four corners of the battery cover;

[0018] S2. The air pump fills the stamping chamber with gas through the multi-way pipe to a set pressure. If the battery cover leaks, the high-pressure gas flows horizontally to push the gas detection balloon to swing, driving the magnetic suspension shaking spring member to contact the first group of conductive sheets, and the multi-color lamp ring lights up the initial light signal;

[0019] S3. After the measuring balloon is stationary, the pressure sensor continuously monitors the air pressure stability to ensure that the leak detection is carried out under steady state and avoid instantaneous interference;

[0020] S4. After the air release valve is opened, the high-pressure gas inside the battery sprays back, and the measuring balloon swings reversely under the action of the air resistance of the circulation groove, triggering the second group of conductive sheets, and the multicolor lamp ring switches the light color to complete the secondary verification;

[0021] S5. The intelligent control system comprehensively determines the leak position and degree through the two light signal changes of the multicolor lamp ring.

[0022] The beneficial effects of the present invention are as follows:

[0023] In the inner cavity of the gas measuring head of the present invention, the magnetic suspension technology is adopted to support the vibrating spring piece, which can be triggered to deflect under the action of the weak pressure difference generated by gas leakage. Cooperating with two groups of symmetric conductive sheets to form a two-way detection mechanism, during the sealing and pressurizing stage of the stamping chamber, the leaked gas drives the vibrating spring piece to contact the first group of conductive sheets to trigger a single-color warning. During the pressure relief stage, it deflects reversely to activate the second group of conductive sheets to switch the light signal color. This dynamic two-color verification mechanism effectively eliminates instantaneous interference signals and reduces the misjudgment rate by more than 80%. The intuitive feedback system of the multicolor lamp ring enables the detection personnel to synchronously obtain the leak position and degree information, providing an accurate decision-making basis for the quality control of battery sealing;

[0024] The layout of the four-corner leak detection components in an annular array realizes the all-round synchronous detection of the battery upper cover. The integrated stamping detection component compresses the traditional multi-station detection process to a single station. Cooperating with the real-time status display of the bottom marking component, the detection cycle is shortened by 40%. The unique two-way pressure verification mechanism can complete the whole process analysis of pressurization - pressure relief within a single detection cycle, and cooperate with the automated production line to achieve seamless connection, eliminating the manual re-inspection link. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the present invention;

[0026] Figure 2 is the structural schematic diagram of the stamping chamber of the present invention;

[0027] Figure 3 is the internal structural schematic diagram of the stamping chamber of the present invention;

[0028] Figure 4 is the structural schematic diagram of the stamping chamber cover of the present invention;

[0029] Figure 5 is the structural schematic diagram of the control box of the present invention;

[0030] Figure 6 is the structural schematic diagram of the gas measuring head of the present invention;

[0031] Figure 7 It is a schematic diagram of the internal structure of the gas detection head of the present invention;

[0032] Figure 8 is the Figure 7 enlarged schematic diagram at position A in the present invention;

[0033] Figure 9 It is a schematic diagram of the structure of the gas detection balloon of the present invention;

[0034] Figure 10 It is a schematic diagram of the structure of the battery ring of the present invention.

[0035] In the figure: 11, airtight detection machine; 12, lifting plate; 2, stamping detection part; 21, stamping chamber; 22, air discharge pipe; 23, air release valve; 24, multi-way pipe; 25, gas charging pipe; 31, control box; 32, gas detection head; 33, pressure sensor; 34, control switch; 35, interlocking wire; 36, shaking spring part; 37, gas detection balloon; 38, circulation groove; 39, limit plate; 301, magnetic ball; 302, magnetic plate 1; 303, magnetic plate 2; 304, limit groove; 305, conductive sheet; 41, battery ring; 42, multi-color lamp ring; 43, turntable. Specific embodiments

[0036] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0037] Embodiment 1

[0038] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, a gas tightness detection device for a battery upper cover includes: an airtight detection machine 11, in its detection area, there is a stamping detection part 2 integrated with a stamping chamber 21. The stamping detection part 2 includes a leak detection component distributed around the four corners of a single battery station to be tested, and an identification component arranged at the bottom of the stamping chamber 21;

[0039] The leak detection component includes four groups of gas detection heads 32 distributed in a rectangular array. Inside the cavity of each gas detection head 32, there is a suspended shaking spring part 36 through magnetic levitation. Between the shaking spring part 36 and the inner wall of the gas detection head 32, there are two groups of symmetrically distributed conductive sheets 305;

[0040] The identification component includes a multi-color lamp ring 42. When the stamping chamber 21 is sealed and pressurized, the leakage gas drives the vibrating spring piece 36 to deflect and contact the first group of conductive sheets 305 to trigger a monochromatic light signal. During the pressure relief stage, it deflects in the reverse direction and contacts the second group of conductive sheets 305 to switch the color of the light signal, and misjudgment is excluded through two-way contact verification.

[0041] A lifting plate 12 is fixedly connected to the lid of the stamping chamber 21, and the lifting plate 12 moves up and down horizontally along with the hydraulic telescopic arm on the frame of the airtight detector 11.

[0042] Several gas filling pipes 25 are provided on the lower wall of the stamping chamber 21. One end of several gas filling pipes 25 away from the stamping chamber 21 is provided with a multi-way pipe 24, and an air pump part is provided at the air supply end of the multi-way pipe 24, and the multi-way pipe 24 is internally connected to the stamping chamber 21.

[0043] One side of the lid of the stamping chamber 21 is fixedly provided with a gas discharge pipe 22. One end of the gas discharge pipe 22 away from the lid of the stamping chamber 21 is fixedly connected with a gas discharge valve 23. Both the gas discharge valve 23 and the air pump part connected to the multi-way pipe 24 are connected to the intelligent control end.

[0044] As Figure 2 、 Figure 3 and Figure 10 shown, the identification component further includes a battery ring 41, and several battery rings 41 are provided. Several battery rings 41 are all fixedly arranged in an array on the inner bottom of the stamping chamber 21. The diameter size of the battery ring 41 is larger than the diameter size of the thermal battery. One thermal battery is placed in each battery ring 41, and the diameter size of the battery ring 41 gradually decreases from top to bottom.

[0045] The multi-color lamp ring 42 is inlaid on the inclined surface of the battery ring 41. The light emission range of the multi-color lamp ring 42 is upward at the center of the circle. A plurality of turntables 43 are also provided on the inclined surface of the battery ring 41. The turntables 43 are rotationally connected to the battery ring 41, and the multi-color lamp ring 42 is connected to the intelligent control end.

[0046] As Figure 5 、 Figure 6 、 Figure 7 and Figure 8 shown, the leak detection component further includes a control box 31. Several control boxes 31 are provided and are all fixed on the lid of the stamping chamber 21. Each control box 31 corresponds to an identification component, and a pressure measurement sensor 33 is fixedly provided on the lower wall of the control box 31.

[0047] ​The shaking spring member 36 further includes a limiting plate 39 fixed to its top end. Above the limiting plate 39, a magnetic ball 301 is fixedly arranged. Between the magnetic ball 301 and the limiting plate 39, a second magnetic plate 303 is arranged. Above the magnetic ball 301, a first magnetic plate 302 is arranged. Both the first magnetic plate 302 and the second magnetic plate 303 are fixedly connected to the inner wall of the gas detection head 32, and the first magnetic plate 302 and the second magnetic plate 303 surround the magnetic ball 301. At the same time, the first magnetic plate 302, the second magnetic plate 303 and the magnetic ball 301 do not contact each other.

[0048] As Figure 9 shown, a gas detection balloon 37 is fixedly arranged at the bottom end of the shaking spring member 36. On one side of the gas detection balloon 37 close to the center of the battery, a plurality of circulation grooves 38 are provided.

[0049] First, place a plurality of hot batteries to be detected in the battery ring 41. Then, push the lifting plate 12 to descend through the hydraulic telescopic arm. As the lifting plate 12 descends, the cover of the stamping chamber 21 is driven to descend and cover the stamping chamber 21, making the stamping chamber 21 sealed. After the cover of the stamping chamber 21 descends, the gas detection balloon 37 just stays around the battery cover.

[0050] Then, control the air pump member to work through the intelligent control system, and inflate the stamping chamber 21 through the multi-way pipe 24 and the air charging pipe 25, so that a high-pressure state is presented in the stamping chamber 21. When the stamping value reaches the specified value of the pressure detection sensor 33, detect the air pressure in the stamping chamber 21 through a plurality of pressure detection sensors 33 at the same time for a period of time, and wait for the gas detection balloon 37 to gradually stop before inflating and pressurizing.

[0051] If the battery cover leaks, in a high-pressure environment, air will enter the gas along the leakage point of the battery cover. The horizontal flow of air will drive the gas detection balloon 37 to swing. The swinging of the gas detection balloon 37 drives the shaking spring member 36 to swing, so that it contacts a group of conductive sheets 305, making this group of conductive sheets 305 conduct. Then, through the control wire 35 connected to the conductive sheet 305 and the control switch 34 fixed on the control box 31, the intelligent control system controls the multi-color lamp ring 42 to light up.

[0052] Improve detection sensitivity: The circulation grooves 38 on the gas detection balloon 37 can increase the wind resistance, making the gas detection balloon 37 easier to swing under the action of gas flow, thereby improving the detection sensitivity.

[0053] Facilitate the detection of different specifications of batteries: The structural design of the gas detection balloon 37 is reasonable, which is convenient for adjustment according to the sizes of different specifications of batteries, improving the versatility of the equipment.

[0054] Improve detection accuracy: The gas detection balloon 37 can accurately reflect the leakage situation of the battery upper cover, improving the detection accuracy.

[0055] The magnetic ball 301 is suspended under the action of magnetic levitation repulsion through the magnetic force with the first magnetic plate 302 and the second magnetic plate 303. In this way, when the test balloon 37 is subjected to a small force, it can swing. The leak detection component adopts the structure of the magnetic levitation vibrating spring 36, enabling the vibrating spring 36 to swing sensitively under the action of a small force, being able to detect minute leaks, and improving the detection sensitivity.

[0056] Improve detection sensitivity: The magnetic levitation structure enables the vibrating spring 36 to swing sensitively under the action of a small force, improving the detection sensitivity and being able to detect minute leaks.

[0057] Reduce frictional losses: Since there is no contact between the magnetic ball 301 and the first magnetic plate 302 and the second magnetic plate 303, frictional losses are reduced, extending the service life of the device.

[0058] Improve stability: The magnetic levitation structure has good stability, ensuring the stability of the vibrating spring 36 during the swinging process and improving the detection accuracy.

[0059] After detecting for a period of time, the pressure in the stamping chamber 21 is relieved by controlling the air release valve 23. When releasing the pressure, the air pressure outside the battery is relieved faster than the air pressure inside it. At this time, if the battery leaks, the air in the battery will leak out along the leakage point, thus blowing onto the corresponding test balloon 37. And there is only a circulation groove 38 on one side of the test balloon 37 close to the center of the battery, which can increase the wind resistance, enabling the test balloon 37 to swing in the reverse direction and contact another set of conductive sheets 305, thereby switching the light signal color of the multicolor lamp ring 42 and realizing the elimination of false judgments through two-way contact verification.

[0060] Through the two-way contact verification mechanism, that is, leakage detection is carried out respectively during the sealed pressurization stage and the pressure relief stage, and it is only determined as a leak when leaks are detected in both stages, effectively eliminating the possibility of false judgments. According to experimental data, the false judgment rate is reduced from 5% of the traditional method to less than 1%.

[0061] The entire detection process is controlled by an intelligent control system, realizing automated detection, improving the detection efficiency. Compared with the traditional manual detection method, the detection efficiency is increased by more than 3 times.

[0062] Intuitively display the detection result: The multicolor lamp ring 42 can intuitively display the detection result, enabling the operator to clearly know which battery upper covers have leakage problems at a glance, improving the readability of the detection result.

[0063] Facilitate the positioning of leaking batteries: Since each battery ring 41 corresponds to a multicolor lamp ring 42, when the multicolor lamp ring 42 lights up, the battery with leakage problems can be accurately located, facilitating subsequent processing and repair.

[0064] Improve the detection efficiency: Through the intuitive display of the multi-color lamp ring 42, the operator can quickly judge the detection result without complex data analysis and processing, thus improving the detection efficiency.

[0065] Embodiment 2

[0066] A method of using an airtight detection device for the battery upper cover, comprising the following steps:

[0067] S1. Place the hot battery to be tested into the battery ring 41, and the hydraulic telescopic arm drives the lifting plate 12 to descend, so that the cover of the stamping chamber 21 is sealed, and the air measuring balloon 37 is accurately positioned at the four corners of the battery cover;

[0068] S2. The air pump inflates the stamping chamber 21 through the multi-way pipe 24 to the set pressure. If the battery cover leaks, the high-pressure gas flows horizontally and pushes the air measuring balloon 37 to swing, driving the magnetic suspension vibrating spring part 36 to contact the first group of conductive sheets 305, and the multi-color lamp ring 42 lights up the initial optical signal;

[0069] S3. After the air measuring balloon 37 is stationary, the pressure sensor 33 continuously monitors the air pressure stability to ensure that the leak detection is carried out under steady state and avoid instantaneous interference;

[0070] S4. After the air release valve 23 is opened, the high-pressure gas inside the battery sprays back, and the air measuring balloon 37 swings in the reverse direction under the action of the air resistance of the circulation groove 38, triggering the second group of conductive sheets 305, and the multi-color lamp ring 42 switches the light color to complete the secondary verification;

[0071] S5. The intelligent control system comprehensively determines the leak position and degree through the two optical signal changes of the multi-color lamp ring 42. A limit groove 304 is also provided on the inner wall of the air measuring head 32, and the limit plate 39 is stuck in the limit groove 304.

[0072] The above describes the embodiments of the present invention, but the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. An airtight detection device for the upper cover of a battery, characterized in that, Comprising: An airtight detection machine (11), in which a stamping detection part (2) integrating a stamping chamber (21) is arranged in the detection area. The stamping detection part (2) includes a leak detection component distributed around the four corners of a single battery station to be measured, and an identification component arranged at the bottom of the stamping chamber (21); The leak detection component includes four groups of air detection heads (32) distributed in a rectangular array. A suspended shaking spring part (36) is arranged in the inner cavity of each air detection head (32) by magnetic suspension. Two groups of symmetrically distributed conductive sheets (305) are arranged between the shaking spring part (36) and the inner wall of the air detection head (32); The identification component includes a multi-color lamp ring (42). When the stamping chamber (21) is sealed and pressurized, the leaked gas drives the shaking spring part (36) to deflect and contact the first group of conductive sheets (305) to trigger a monochromatic light signal. During the pressure relief stage, it deflects in the reverse direction and contacts the second group of conductive sheets (305) to switch the color of the light signal, and false judgment is excluded through two-way contact verification.

2. The airtight detection device for the battery upper cover according to claim 1, characterized in that, A lifting plate (12) is fixedly connected to the box cover of the stamping chamber (21), and the lifting plate (12) moves up and down with the hydraulic telescopic arm on the frame of the airtight detection machine (11).

3. The airtight detection device for the battery upper cover according to claim 1, characterized in that, A plurality of charging pipes (25) are arranged on the lower wall of the stamping chamber (21). One end of each of the plurality of charging pipes (25) far from the stamping chamber (21) is provided with a multi-way pipe (24), and an air pump part is arranged at the air supply end of the multi-way pipe (24). The multi-way pipe (24) is communicated with the inside of the stamping chamber (21).

4. The airtight detection device for the battery upper cover according to claim 3, wherein, One side of the box cover of the stamping chamber (21) is fixedly provided with a discharge pipe (22). One end of the discharge pipe (22) far from the box cover of the stamping chamber (21) is fixedly connected with a discharge valve (23). Both the discharge valve (23) and the air pump part connected to the multi-way pipe (24) are connected to the intelligent control end.

5. The airtight detection device for the battery upper cover according to claim 1, characterized in that, The identification component further includes a battery ring (41), and a plurality of battery rings (41) are provided. The plurality of battery rings (41) are all fixedly arranged in an array on the inner bottom of the stamping chamber (21). The diameter size of the battery ring (41) is larger than the diameter size of the thermal battery. One thermal battery is placed in each battery ring (41), and the diameter size of the battery ring (41) gradually decreases from top to bottom.

6. The airtight detection device for the battery upper cover according to claim 5, characterized in that, The multi-color lamp ring (42) is embedded in the inclined surface of the battery ring (41). The light emission range of the multi-color lamp ring (42) is upward at the center of the circle. A plurality of turntables (43) are also arranged on the inclined surface of the battery ring (41). The turntables (43) are rotationally connected to the battery ring (41). The multi-color lamp ring (42) is connected to the intelligent control end.

7. The airtight detection device for the battery upper cover according to claim 1, wherein, The leak detection component further includes a control box (31). A plurality of control boxes (31) are provided and are all fixed on the box cover of the stamping chamber (21). Each control box (31) corresponds to an identification component. A pressure sensor (33) is fixedly arranged on the lower wall of the control box (31).

8. An airtight detection device for the battery upper cover according to claim 7, characterized in that, The shaking spring member (36) further includes a limit plate (39) fixed to its top end. Above the limit plate (39), a magnetic ball (301) is fixedly arranged. A second magnetic plate (303) is arranged between the magnetic ball (301) and the limit plate (39). Above the magnetic ball (301), a first magnetic plate (302) is arranged. Both the first magnetic plate (302) and the second magnetic plate (303) are fixedly connected to the inner wall of the gas detection head (32), and the first magnetic plate (302) and the second magnetic plate (303) surround the magnetic ball (301). At the same time, the first magnetic plate (302), the second magnetic plate (303), and the magnetic ball (301) do not contact each other.

9. The airtight detection device for the battery upper cover according to claim 8, characterized in that, A gas detection balloon (37) is fixedly arranged at the bottom end of the shaking spring member (36). A plurality of circulation grooves (38) are formed on one side of the gas detection balloon (37) close to the center of the battery.

10. A method of using the airtight detection device for the battery upper cover according to any one of claims 1-9, characterized in that, It includes the following steps: S1. Place the hot battery to be tested into the battery ring (41). The hydraulic telescopic arm drives the lifting plate (12) to descend, so that the cover of the stamping chamber (21) is sealed, and the gas detection balloon (37) is accurately positioned at the four corners of the battery cover. S2. The air pump inflates the stamping chamber through the multi-way pipe (24) to a set pressure. If the battery cover leaks, the high-pressure gas flows horizontally and pushes the gas detection balloon (37) to swing, driving the magnetic suspension shaking spring member (36) to contact the first group of conductive sheets (305), and the multi-color lamp ring (42) lights up the initial optical signal. S3. After the gas detection balloon (37) stops, the pressure sensor (33) continuously monitors the air pressure stability to ensure that the leak detection is carried out under a steady state and avoid instantaneous interference. S4. After the air release valve (23) is opened, the high-pressure gas inside the battery sprays back. The gas detection balloon (37) swings in the reverse direction under the action of the wind resistance of the circulation grooves (38), triggering the second group of conductive sheets (305), and the multi-color lamp ring (42) switches the light color to complete the secondary verification. S5. The intelligent control system comprehensively determines the leak position and degree through the two optical signal changes of the multi-color lamp ring (42).

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