Air tightness detection device for energy storage case

Abstract

The invention relates to the field of airtightness detection, and discloses an energy storage case airtightness detection device which comprises a detection frame body, a detection tank is installed on the detection frame body, a tank cover assembly is arranged above the detection tank, the tank cover assembly comprises a transverse support and a linear module driving the transverse support to move vertically, and a sealing cover is arranged at the bottom of the transverse support. A plurality of barometers are distributed on the detection tank and the sealing cover in an array mode, a sealing ring close to a tank opening is arranged outside the detection tank, an annular groove is formed in the upper end face of the sealing ring, and the vertical section of the annular groove is in a circular shape. A limiting ring is arranged at the bottom of the sealing cover, a ring hole is formed in the end face of the limiting ring, an air bag is arranged in the ring hole, the bottom of the air bag extends out of the ring hole, an inflation pipe communicated with the ring hole is arranged on the sealing cover, and the tail ends of the air feeding pipe and the inflation pipe are both communicated with an air compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, and in particular to the field of air tightness detection of energy storage boxes. Background Art

[0002] Air tightness testing refers to the testing of the sealing performance of an object, which mainly includes the pressure drop method and the water immersion method. The water immersion method uses water as the testing medium. The object is placed in water and the sealing performance of the object is judged by whether water enters the object. This testing method easily causes water to get on the object, which needs to be dried later. Not only is it troublesome, but it is also easy to damage the object. The pressure drop method uses a gas medium as the testing medium, such as air. A preset amount of air is injected into the object, and the internal air pressure of the object is monitored. The sealing performance of the object is obtained according to the change in air pressure. It is not easy to damage the object, and the test results can be clearly and intuitively obtained through technical means such as a barometer. Therefore, the pressure drop method is more widely used.

[0003] After searching, a Chinese invention patent with publication number CN115219120A was found, which discloses a device for detecting the air tightness of an energy storage chassis. The device solves the problem that the thin wall of the chassis is easily deformed. However, it still has some shortcomings. For example, when testing the air tightness, the hole structure of the chassis is sealed by a sealing ring, and then a gas medium is injected into the chassis. This detection method can only detect the air tightness of the chassis except the hole structure. However, the chassis is a whole, and the sealing performance between the components at the hole structure of the chassis and the chassis is not tested, and the detection is not comprehensive enough. For example, this detection method cannot perform self-test. If the sealing ring and other components of the detection device have problems such as damage or aging that are not easily observed by the naked eye, the obtained detection result is inaccurate and needs to be improved.

[0004] Based on the above, the present invention proposes an energy storage chassis air tightness detection device. Summary of the invention

[0005] In order to solve the problems mentioned in the above background, the present invention provides an energy storage chassis air tightness detection device.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0007] An energy storage chassis air tightness detection device comprises a detection frame, a detection tank is mounted on the detection frame, a tank cover assembly is arranged above the detection tank, the tank cover assembly comprises a horizontal support and a linear module for driving the horizontal support to move in a vertical direction, a sealing cover coaxial with the detection tank is arranged at the bottom of the horizontal support, an air injection hole is arranged through the end surface of the sealing cover, an air supply pipe is arranged at the upper opening of the air injection hole, a lower supporting seat is arranged at the bottom of the sealing cover, and a plurality of pressure gauges are arranged in an array on the detection tank and the sealing cover, which are used to monitor the air pressure fluctuation of various parts of the detection tank after the tank mouth is blocked, so as to improve the accuracy of the detection result; A sealing ring close to the tank mouth is arranged on the outside of the detection tank, and a ring groove is arranged on the upper end face of the sealing ring. The vertical cross-section of the ring groove is circular. A limit ring is coaxially arranged on the bottom of the sealing cover, and a ring hole is coaxially opened on the end face of the limit ring. An air bag is arranged in the ring hole, and the bottom of the air bag extends out of the ring hole. An inflation tube connected with the ring hole is arranged on the sealing cover, and the ends of the air supply tube and the inflation tube are connected with the air compressor to fill air into the detection tank and the air bag.

[0008] As a further improvement and optimization of the present invention, the annular hole consists of an upper ring segment and a lower ring segment, the inner and outer diameters of the upper ring segment are both larger than the inner and outer diameters of the lower ring segment, the upper opening of the airbag is fixedly arranged in the upper ring segment, and the bottom of the airbag passes through the lower ring segment.

[0009] As a further improvement and optimization of the present invention, a skeleton is provided inside the airbag, and the skeleton is connected to the upper ring section of the ring hole; initially, the airbag is deflated, and the skeleton is used to provide internal support for the airbag, so that the subsequent airbag can be smoothly inserted into the ring groove of the sealing ring.

[0010] As a further improvement and optimization of the present invention, the edge chamfer on the outer side of the mouth of the detection tank and the edge chamfer on the inner side of the lower end surface of the limit ring are chamfered, and when the sealing cover moves downward, the inclined surfaces formed by the two chamfers can fit together, which can further improve the sealing performance of the mouth of the detection tank.

[0011] As a further improvement and optimization of the present invention, a vent hole is provided at the bottom of the annular groove; during the inflation of the airbag, if there is no vent hole, it is easy for the outer surface of the airbag to first fit with the upper part of the wall of the annular groove, and the air in the area below the fitting cannot be discharged during the subsequent inflation of the airbag, thereby affecting the contact between the airbag and the wall of the annular groove, and ultimately affecting the sealing of the airbag.

[0012] As a further improvement and optimization of the present invention, a connecting bracket is provided on the sealing cover, a base frame is rotatably mounted on the connecting bracket, and a rotating shaft formed at the rotating mounting position is arranged vertically, the rotating shaft is driven to rotate by a deflection motor arranged on the connecting bracket, an inner core shaft arranged vertically is installed at the bottom of the base frame, the inner core shaft is driven to rotate by a driving motor arranged on the base frame, the inner core shaft is hollow inside and a connecting pipe is arranged at the upper opening through a rotating joint, and the end of the connecting pipe is connected to the negative pressure pump; A cleaning ball with a spherical shape and a plurality of inlet and outlet holes arranged in an array on the outer surface is also installed on the bottom frame. The lower opening of the inner core shaft is located in the cleaning ball. A connecting shaft extends from the upper opening of the cleaning ball. The connecting shaft is coaxially connected to the inner core shaft. The cleaning ball is made of elastic material. A rotating fan located above the cleaning ball is installed on the bottom frame, and the rotating fan is coaxially connected with the inner core shaft.

[0013] The deflection motor can drive the base frame to rotate, and the linear module can drive the cleaning component to move downward. The two can cooperate to insert a cleaning ball made of elastic material into the annular groove. The outer surface of the cleaning ball fits with the groove wall of the annular groove, and the rotating fan 406 contacts the upper end surface of the sealing ring. Then the rotating motor drives the detection tank to rotate, and the driving motor drives the inner core shaft to rotate. The inner core shaft rotates with the cleaning ball and the rotating fan, and the air in the cleaning ball is sucked by the negative pressure source. In this way, the upper end surface of the sealing ring is cleaned by the rotating fan, and the groove wall and groove bottom of the annular groove are wiped by the cleaning ball. At the same time, the wiped dirt is sucked into the inner core shaft by the negative pressure, and finally discharged through the connecting pipe to achieve the cleaning purpose.

[0014] As a further improvement and optimization of the present invention, a connecting seat is provided on the detection frame, a vertically arranged flushing tank is provided on the connecting seat, a waste liquid pipe is provided at the bottom of the flushing tank, an inner partition is extended downward from the pipe mouth of the flushing tank, the inner partition is in the shape of a truncated cone with a diameter decreasing from bottom to top, a number of downward inclined spray holes are evenly spaced on the inner partition, the bottom of the inner partition is connected to the tank wall of the flushing tank, the area of ​​the flushing tank above the inner partition is named the spraying area, a flushing hole connected to the spraying area is provided on the connecting seat, a water pipe is connected to the orifice of the flushing hole, and a water pump is provided at the end of the water pipe.

[0015] After the cleaning component completes cleaning the sealing ring, the linear module and the deflection motor can be used to pull the cleaning ball into the flushing tank. Then, the water pump drives the flushing medium to rush toward the cleaning ball through the spray hole. At the same time, the driving motor drives the cleaning ball to rotate, thereby flushing the cleaning ball and preventing dirt from adhering to the cleaning ball and affecting the cleaning effect of the cleaning ball next time.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This solution uses a sealing cover to block the mouth of the test tank, injects a preset amount of air into the test tank, and determines whether the sealing of the test tank is qualified or the sealing of the energy storage chassis in the test tank is qualified according to the fluctuation of the barometer within the preset time, so as to realize the airtightness test of the energy storage chassis. This detection method not only does not cause damage to the energy storage chassis, but also makes the test results more accurate. On this basis: 1. The sealing mechanism arranged between the sealing cover and the detection tank adopts a double sealing method: the inclined surface of the limit ring and the inclined surface of the detection tank are sealed together + the airbag and the ring groove wall are sealed together, the sealing effect is better, and the fitting area between the airbag and the ring groove wall is larger, and the sealing effect is also better. Furthermore, a vent hole is opened at the bottom of the ring groove. During the inflation of the airbag, if there is no vent hole, it is easy for the outer surface of the airbag to fit with the upper part of the ring groove wall first, and the air in the area below the fitting cannot be discharged during the subsequent inflation of the airbag, which in turn affects the contact between the airbag and the ring groove wall, and finally affects the sealing of the airbag. That is, the setting of the vent hole can increase the sealing performance between the airbag and the ring groove; 2. Through the cooperation of the cleaning component and the flushing component, the ring groove can be cleaned to prevent the seal from being affected by the dirt in the ring groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 The structure of the present invention is schematically shown Figure 2 ; Figure 3 The structure of the present invention is schematically shown Figure 3 ; Figure 4 It is a schematic diagram of the detection tank and the sealing ring; Figure 5 is a schematic diagram of a tank cover assembly; Figure 6 It is a partial cross-sectional view of the air bag and the sealing cover; Figure 7 It is a partial cross-sectional view of the airbag when the sealing ring is blocked; Figure 8 is a schematic diagram of a cleaning component; Fig. 9 A cross-sectional view of the flushing assembly.

[0018] The reference numerals in the accompanying drawings are: 100, detection frame; 101, linear module; 200, detection tank; 201, sealing ring; 300, tank cover assembly; 301, horizontal bracket; 302, sealing cover; 303, lower support seat; 304, air supply pipe; 305, limit ring; 306, air bag; 307, frame; 308, inflation tube; 400, cleaning assembly; 401, connecting bracket; 402, base frame; 403, deflection motor; 404, driving motor; 405, inner core shaft; 406, rotating fan; 407, cleaning ball; 408, connecting pipe; 500, flushing assembly; 501, connecting seat; 502, flushing tank; 503, inner partition; 504, waste liquid pipe; 505, flushing hole. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0020] The reference numeral a in the accompanying drawings of this solution refers to the chassis to be tested for air tightness.

[0021] Embodiment 1 Reference Figure 1-Figure 9 , an energy storage chassis air tightness detection device, comprising a detection frame 100, a detection tank 200 arranged vertically is mounted on the detection frame 100, and a tank cover assembly 300 is arranged above the detection tank 200, wherein: A number of pressure gauges are evenly distributed in an array on the detection tank 200 and the tank cover assembly 300, which are used to monitor the pressure fluctuations of various parts of the detection tank 200 after the tank mouth is blocked, so as to improve the accuracy of the detection results; A sealing mechanism is provided between the tank cover assembly 300 and the detection tank 200 for sealing connection therebetween.

[0022] Reference Figure 4 and Figure 5 The tank cover assembly 300 includes a horizontal bracket 301 and a linear module 101 for driving the horizontal bracket 301 to move in the vertical direction. A sealing cover 302 coaxial with the detection tank 200 is provided at the bottom of the horizontal bracket 301. An air injection hole is penetrated through the end surface of the sealing cover 302. An air supply pipe 304 is provided at the upper orifice of the air injection hole. The end of the air supply pipe 304 is connected to the gas medium, for example, it is connected to an air compressor, an air pump, etc., and the gas medium is injected into the detection tank 200 whose tank mouth is blocked by the sealing cover 302 through the air supply pipe 304.

[0023] A lower supporting seat 303 is provided at the bottom of the sealing cover 302, and the lower supporting seat 303 is used to support the energy storage chassis.

[0024] Reference Figure 4 and Figure 7 The sealing mechanism includes a sealing ring 201 coaxially arranged outside the detection tank 200 and close to the tank mouth. The upper end surface of the sealing ring 201 is provided with a ring groove, and the vertical cross-section of the ring groove is circular.

[0025] Reference Figure 6 and Figure 7 The sealing mechanism also includes a limiting ring 305 coaxially arranged at the bottom of the sealing cover 302. The end face of the limiting ring 305 is coaxially provided with a ring hole, which is composed of an upper ring segment and a lower ring segment. The inner and outer diameters of the upper ring segment are both larger than the inner and outer diameters of the lower ring segment.

[0026] An airbag 306 is arranged in the annular hole. Specifically, the upper opening of the airbag 306 is fixedly arranged in the upper annular section, and the bottom of the airbag 306 passes through the lower annular section. A sealing hole is opened on the sealing cover 302, and an inflation tube 308 extends from the upper opening of the sealing hole. The end of the inflation tube 308 is also connected to the gas medium, for example, connected to an air compressor, an air pump, etc. The sealing hole is connected to the annular hole, and the airbag 306 can be expanded by injecting gas medium into the annular hole.

[0027] Preferably, a skeleton 307 is provided inside the airbag 306, and the skeleton 307 is connected to the upper ring section of the ring hole. The significance of this is that initially, the airbag 306 is deflated, and the airbag 306 is internally supported by the skeleton 307, so that the airbag 306 can be smoothly inserted into the ring groove of the sealing ring 201 later.

[0028] Preferably, refer to Figure 7 The outer side of the mouth of the detection tank 200 is chamfered, and the inner side of the lower end surface of the limiting ring 305 is also chamfered. When the sealing cover 302 moves downward, the inclined surfaces formed by the two chamfers can fit together, which is significant in that the sealing performance is further improved.

[0029] Working principle of embodiment 1: The process of detecting whether the mouth of the tank 200 is closed or opened: The linear module 101 drives the horizontal support 301 to move downward, so that the airbag 306 is inserted into the annular groove, and the inclined surface on the limit ring 305 fits with the inclined surface on the detection tank 200. Then, the gas medium enters the airbag 306 through the inflation tube 308, so that the airbag 306 expands, and the outer surface of the airbag 306 fits tightly with the wall of the annular groove. Figure 7 As shown, at this time, there are two seals between the detection tank 200 and the sealing cover 302: the inclined surface fitting and the airbag 306, the double sealing effect is better, and the fitting area between the airbag 306 and the annular groove wall is larger, and the sealing effect is also better. The preferred embodiment, refer to Figure 7The bottom of the annular groove is provided with an air release hole. Its significance lies in that during the expansion process of the airbag 306, if there is no air release hole, it is easy for the outer surface of the airbag 306 to first fit with the upper part of the annular groove wall, and the air in the area below the fitting cannot be discharged when the airbag 306 is subsequently expanded, thereby affecting the contact between the airbag 306 and the annular groove wall, and finally affecting the sealing of the airbag 306.

[0030] Energy storage chassis air tightness testing process: First, the tank cover assembly 300 blocks the tank opening of the detection tank 200, and then a preset amount of gas medium is injected into the detection tank 200 through the gas supply pipe 304. After waiting for a preset time, the fluctuation of the barometer is observed to determine whether the detection environment is qualified. Only after it is qualified can the air tightness test of the energy storage chassis be carried out; Open the tank mouth, place the energy storage chassis on the lower support seat 303, and then seal the tank mouth again. At this time, the energy storage chassis is located in the detection tank 200, and then a preset amount of gas medium is injected into the detection tank 200, and wait for a preset time. If the sealing of the chassis is unqualified, the gas medium in the detection tank 200 will enter the chassis under the pressure difference, causing the pressure gauge to fluctuate. If the sealing of the chassis is qualified, the gas medium in the detection tank 200 will not enter the chassis, and the fluctuation of the pressure gauge is within the preset range, thereby realizing the airtightness detection of the chassis.

[0031] Embodiment 2 In the first embodiment, the ring groove is exposed to the outside. After being placed for a long time, dirt is likely to be present in the ring groove. Therefore, the ring groove needs to be cleaned regularly. Based on this, the second embodiment is proposed.

[0032] Reference Figure 1-Figure 3 The device also includes a cleaning component 400 and a flushing component 500, the former is used to clean the annular groove, and the latter is used to flush the former.

[0033] Reference Figure 8 The cleaning component 400 includes a connecting bracket 401 connected to the sealing cover 302, a base frame 402 is rotatably mounted on the connecting bracket 401, and a rotating shaft formed at the rotating mounting position is vertically arranged and driven to rotate by a deflection motor 403 arranged on the connecting bracket 401, a vertically arranged inner core shaft 405 is installed at the bottom of the base frame 402, and the inner core shaft 405 is driven to rotate by a driving motor 404 arranged on the base frame 402, the interior of the inner core shaft 405 is hollow, and a connecting pipe 408 is arranged at the upper opening through a rotating joint, and a negative pressure source is arranged at the end of the connecting pipe 408, such as a negative pressure pump, a blower, etc., which can suck air from the connecting pipe 408.

[0034] A cleaning ball 407 is also installed on the base frame 402. The cleaning ball 407 is spherical in shape and has a plurality of inlet and outlet holes arranged in an array on the outer surface. The lower opening of the inner core shaft 405 is located in the cleaning ball 407. A connecting shaft extends from the upper opening of the cleaning ball 407. The connecting shaft is coaxially connected to the inner core shaft 405. The cleaning ball 407 is made of an elastic material, such as elastic plastic. Furthermore, the cleaning ball 407 is composed of a plurality of elastic strips distributed in an array along the circumferential direction, and the gap between two adjacent elastic sheets is the inlet and outlet hole.

[0035] A rotating fan 406 located above the cleaning ball 407 is also installed on the bottom frame 402 , and the rotating fan 406 is coaxially connected to the inner core shaft 405 .

[0036] The working process of the cleaning component 400 is as follows: The deflection motor 403 can drive the base frame 402 to rotate, and the linear module 101 can drive the cleaning assembly 400 to move downward. The two cooperate to insert the cleaning ball 407 made of elastic material into the annular groove, and the outer surface of the cleaning ball 407 fits with the groove wall of the annular groove, and the rotating fan 406 contacts the upper end surface of the sealing ring 201; Then, the detection tank 200 is driven to rotate by the rotating motor arranged on the detection frame 100, and the inner core shaft 405 is driven to rotate by the driving motor 404. The inner core shaft 405 rotates together with the rotating fan 406 with the cleaning ball 407, and the air in the cleaning ball 407 is sucked by the negative pressure source. In this way, the upper end surface of the sealing ring 201 is cleaned by the rotating fan 406, and the groove wall and groove bottom of the ring groove are wiped by the cleaning ball 407. At the same time, the wiped dirt is sucked into the inner core shaft 405 by the negative pressure, and finally discharged through the connecting pipe 408, which is similar to the existing vacuum cleaner technology and will not be elaborated.

[0037] After cleaning, the linear module 101 drives the cleaning component 400 to move upward and leave the annular groove, and then drives the base frame 402 to rotate through the deflection motor 403, so that the cleaning component 400 is away from the sealing cover 302 and does not interfere with the subsequent airtightness detection.

[0038] Reference Fig. 9The flushing assembly 500 includes a connection seat 501 connected to the detection frame 100, a vertically arranged flushing tank 502 is arranged on the connection seat 501, a waste liquid pipe 504 is arranged at the bottom of the flushing tank 502, an inner partition 503 extends downward from the pipe mouth of the flushing tank 502, the inner partition 503 is a truncated cone shape with a diameter decreasing from bottom to top, a plurality of downwardly inclined spray holes are evenly spaced on the inner partition 503, the bottom of the inner partition 503 is connected to the tank wall of the flushing tank 502, the area of ​​the flushing tank 502 located above the inner partition 503 is named the spraying area, and the connection seat 501 is provided with a spray hole connected to the spraying area. The connected flushing hole 505 is connected to the water pump through a water pipe, and the water pump and the water pipe are not shown in the figure; after the cleaning component 400 completes the cleaning of the sealing ring 201, the cleaning ball 407 can be pulled into the flushing tank 502 through the cooperation of the linear module 101 and the deflection motor 403, and then the water pump drives the flushing medium (such as water) to rush to the cleaning ball 407 through the spray hole, and at the same time drives the motor 404 to drive the cleaning ball 407 to rotate, so as to achieve the flushing of the cleaning ball 407, avoid dirt adhering to the cleaning ball 407, and affect the cleaning effect of the cleaning ball 407 next time.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An energy storage chassis air tightness detection device, comprising a detection frame (100), characterized in that: A detection tank (200) is mounted on the detection frame (100); a tank cover assembly (300) is arranged above the detection tank (200); the tank cover assembly (300) comprises a horizontal support (301) and a linear module (101) for driving the horizontal support (301) to move in a vertical direction; a sealing cover (302) coaxial with the detection tank (200) is arranged at the bottom of the horizontal support (301); an air injection hole is arranged through the end surface of the sealing cover (302); an air supply pipe (304) is arranged at the upper opening of the air injection hole; a lower supporting seat (303) is arranged at the bottom of the sealing cover (302); and a plurality of air pressure gauges are arranged in an array on the detection tank (200) and the sealing cover (302); The detection tank (200) is provided with a sealing ring (201) near the tank mouth on the outside, and a ring groove is provided on the upper end surface of the sealing ring (201), and the vertical cross-section of the ring groove is circular. A limit ring (305) is coaxially provided on the bottom of the sealing cover (302), and a ring hole is coaxially opened on the end surface of the limit ring (305), and an air bag (306) is provided in the ring hole, and the bottom of the air bag (306) protrudes from the ring hole. An air filling pipe (308) connected to the ring hole is provided on the sealing cover (302), and the ends of the air supply pipe (304) and the air filling pipe (308) are both connected to the air compressor.

2. The energy storage chassis air tightness detection device according to claim 1, characterized in that: The annular hole is composed of an upper annular section and a lower annular section. The inner and outer diameters of the upper annular section are both larger than the inner and outer diameters of the lower annular section. The upper opening of the airbag (306) is fixedly arranged in the upper annular section, and the bottom of the airbag (306) passes through the lower annular section.

3. The energy storage chassis air tightness detection device according to claim 1, characterized in that: A frame (307) is arranged inside the airbag (306), and the frame (307) is connected to the upper ring section of the ring hole.

4. The energy storage chassis air tightness detection device according to claim 1, characterized in that: The outer side of the mouth of the detection tank (200) and the inner side of the lower end surface of the limit ring (305) are chamfered, and when the sealing cover (302) moves downward, the inclined surfaces formed by the two chamfers can be fitted.

5. An energy storage chassis air tightness detection device according to claim 1 or 4, characterized in that: A vent hole is provided at the bottom of the annular groove.

6. The energy storage chassis air tightness detection device according to claim 1, characterized in that: A connecting bracket (401) is provided on the sealing cover (302), a base frame (402) is rotatably mounted on the connecting bracket (401), and a rotating shaft formed at the rotating mounting position is arranged vertically, and the rotating shaft is driven to rotate by a deflection motor (403) arranged on the connecting bracket (401), and an inner core shaft (405) arranged vertically is installed at the bottom of the base frame (402), and the inner core shaft (405) is driven to rotate by a driving motor (404) arranged on the base frame (402), the inner core shaft (405) is hollow inside, and a connecting pipe (408) is provided at the upper opening via a rotating joint, and the end of the connecting pipe (408) is connected to a negative pressure pump; A cleaning ball (407) is also mounted on the bottom frame (402) and is spherical in shape and has a plurality of inlet and outlet holes arranged in an array on its outer surface. The lower opening of the inner core shaft (405) is located inside the cleaning ball (407). A connecting shaft extends from the upper opening of the cleaning ball (407) and is coaxially connected to the inner core shaft (405). The cleaning ball (407) is made of an elastic material.

7. The energy storage chassis air tightness detection device according to claim 6, characterized in that: A rotating fan (406) located above the cleaning ball (407) is mounted on the bottom frame (402), and the rotating fan (406) is coaxially connected to the inner core shaft (405).

8. The energy storage chassis air tightness detection device according to claim 6, characterized in that: A connecting seat (501) is provided on the detection frame (100), a vertically arranged flushing tank (502) is provided on the connecting seat (501), a waste liquid pipe (504) is provided at the bottom of the flushing tank (502), an inner partition (503) extends downward from the pipe mouth of the flushing tank (502), the inner partition (503) is in the shape of a truncated cone with a diameter decreasing from bottom to top, a plurality of downwardly inclined spray holes are evenly spaced on the inner partition (503), the bottom of the inner partition (503) is connected to the tank wall of the flushing tank (502), the area of ​​the flushing tank (502) located above the inner partition (503) is named a spraying area, a flushing hole (505) connected to the spraying area is provided on the connecting seat (501), a water pipe is connected to the orifice of the flushing hole (505), and a water pump is provided at the end of the water pipe.

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