Sealing device for helium detection of cylindrical battery

Abstract

The utility model provides a sealing device for helium detection of a cylindrical battery. The sealing device comprises a linear module, a cavity mechanism, a cavity cover mechanism and a cavity cover cleaning mechanism, the output end of the linear module can linearly move between the feeding and discharging position and the detection position, and the cavity mechanism is fixed to the output end of the linear module. The cavity cover mechanism is located at the detection position and is located above the cavity mechanism; the cavity cover cleaning mechanism is fixed to the output end of the linear module and located beside the cavity cover mechanism, and the linear module drives the cavity mechanism to move to the lower portion of the cavity cover mechanism to form one or more sealing cavities in a covering mode so that helium detection can be conducted on one or more cylindrical batteries at the same time; and the linear module drives the cavity cover cleaning mechanism to move to the lower part of the cavity cover mechanism to cover and clean the cavity cover part of the sealing cavity of the cavity cover mechanism.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cylindrical battery manufacturing equipment technical field, especially relate to a cylindrical battery helium detection sealing device. BACKGROUND

[0002] The primary battery (referred to as cylindrical battery hereinafter) of cylindrical lithium battery is a sealed container containing anode and anolyte. The sealing performance of the battery is poor, which will cause the battery to leak electrolyte during use, and more seriously, water vapor will penetrate into the electrolyte, which will condense into water and enter the electrolyte, thereby damaging the insulation performance of the internal electrochemical system of the battery. A small amount of water will cause an abnormal large current during the charging process of the battery, resulting in abnormal heating, explosion and combustion. The sealing performance of the battery is related to the safety of the battery and the device using the battery, such as electric vehicles.

[0003] The industry uses helium as a tracer gas for leak detection. The helium is first filled and sealed in the cylindrical battery. During detection, the cylindrical battery is placed in a sealed cavity and vacuumed by a vacuum pump to form a vacuum cavity. The pressure difference between the inside and outside of the cylindrical battery is formed, and the helium leaks from the possible leak welds, cracks, pores, slag and other places from the inside to the outside. The vacuum cavity containing the leaked helium is extracted by a detection pump and provided to a helium detector. After a certain period of time, when the speed of the helium extracted from the vacuum cavity by the detection pump and provided to the helium detector is equal to the speed of the helium leaked from the battery into the vacuum cavity, that is, when the detected helium and the leaked helium are balanced, the flow rate of the helium per unit time detected is the helium leakage rate of the cylindrical battery. The sealing performance of the battery is detected by helium, which is called helium detection.

[0004] The leakage of the sealed container is absolute, and the non-leakage is relative. The qualified standard of the air tightness of the cylindrical battery is that the helium leakage rate is greater than or equal to 9.9 x 10- 7 Pa·m3 / s at 23 DEG C, and it is judged as unqualified. According to this standard, the unqualified products are detected and removed, so as to ensure that the sealing performance of the battery entering the use is qualified, thereby ensuring the safety performance of the battery entering the use.

[0005] Therefore, we develop a cylindrical battery helium detection machine for detecting the sealing performance of the cylindrical battery. The requirements for the cylindrical battery helium detection sealing cavity are as follows:

[0006] (1) The air pressure in the sealed cavity reaches ≦ 20 Pa after 2 s of vacuum extraction.

[0007] (2) The sealing performance of the vacuum cavity: after the air pressure reaches ≦ 20 Pa, the air pressure increases ≦ 1 Pa / s.

[0008] Therefore, we develop a cylindrical battery helium detection sealing device. UTILITY MODEL CONTENTS

[0009] The utility model discloses a cylindrical battery helium detection sealing device for detecting the sealing performance of the cylindrical battery, which comprises

[0010] A linear module is horizontally fixed on an external machine table, with a right end as a feeding and discharging position and a left end as a detection position. An output end of the linear module can move linearly between the feeding and discharging position and the detection position.

[0011] A cavity mechanism is fixed on the output end of the linear module.

[0012] A cavity cover mechanism is fixed on the external machine table, located at the detection position and above the cavity mechanism.

[0013] A cavity cover cleaning mechanism is fixed on the output end of the linear module, located beside the cavity cover mechanism. A center line of the cavity cover cleaning mechanism coincides with a center line of the cavity cover mechanism in a linear direction of the output end of the linear module.

[0014] The linear module moves with the cavity mechanism to the cavity cover mechanism to form one or more sealed cavities for simultaneously performing helium detection on one or more cylindrical batteries. The linear module moves with the cavity cover cleaning mechanism to the cavity cover mechanism to cover the cavity cover mechanism for cleaning a cavity cover part of the sealed cavity of the cavity cover mechanism.

[0015] Further, the cavity mechanism includes a cavity support, four cavity sliding sleeves, a cavity lifting driver, a cavity sliding plate, a cavity, one or more cavity sealing rings, and one or more pairs of cylindrical battery pair radiation sensors.

[0016] The cavity support includes a cavity support bottom plate, four cavity support columns and a cavity support top plate, the cavity support bottom plate is fixed on the output end of the linear module; four cavity support columns are fixed on the four corners of the cavity support bottom plate, the cavity support top plate is fixed on the top of the four cavity support columns, and the cavity support top plate is a frame with a hollow middle part; four cavity sleeves are respectively sleeved on the four cavity support columns, the cavity lifting driver is fixed on the cavity support bottom plate, the cavity sliding plate is fixed on the four cavity sleeves and the output end of the cavity lifting driver, the cavity includes a cavity body, one or more cavity cylindrical battery cavities and one or more cavity sealing ring grooves, the cavity body is fixed on the cavity sliding plate and located in the hollow middle part of the cavity support top plate, one or more cavity cylindrical battery cavities are arranged side by side and upward in the middle part of the cavity body, and one or more cavity sealing ring grooves are arranged around the opening of each cavity cylindrical battery cavity; one or more cavity sealing rings are respectively located in the cavity sealing ring grooves of the one or more cavity cylindrical battery cavities, and one or more pairs of cylindrical battery opposite-inclination sensors are arranged and fixed on the frame edges of the cavity support top plate, located on the two sides of the one or more cavity cylindrical battery cavities and respectively opposite to one cylindrical battery contained in the one or more cavity cylindrical battery cavities, and the cavity lifting driver is used to drive the cavity sliding plate to carry the cavity to ascend along the cavity support columns and be combined with the cavity cover mechanism to form one or more sealed cavities for the cylindrical batteries to simultaneously perform helium detection.

[0017] Further, the cavity cover mechanism includes a cavity cover support and a cavity cover assembly, the cavity cover support includes a cavity cover support bottom plate, four cavity cover support columns and a cavity cover support top plate, the cavity cover support bottom plate is fixed on the external machine table and located at the detection position, four cavity cover support columns are fixed on the four corners of the cavity cover support bottom plate, the cavity cover support top plate is fixed on the top of the four cavity cover support columns, the cavity cover support top plate is a frame with a hollow middle part, the cavity cover assembly passes through the hollow area in the middle part of the cavity cover support top plate and is fixed on the frame of the cavity cover support top plate; the height and span of the four cavity cover support columns match the height and span of the four cavity support columns, so that the linear module can carry the cavity mechanism to move under the cavity cover mechanism to combine to form one or more sealed cavities for one or more cylindrical batteries to simultaneously perform helium detection.

[0018] Further, the cavity cover assembly comprises a cavity cover, one or more cavity cover gate valves, a cavity cover pipeline, a vacuumizing gate valve, a helium detection gate valve, a cleaning gate valve, a vacuum gauge, a venting gate valve and a muffler; the cavity cover is fixed on the cavity cover support top plate, and one or more cavity cover cylindrical battery cavities are arranged in the middle of the cavity cover in a downward direction and in the same number and in alignment with the one or more cavity body cylindrical battery cavities arranged in the middle of the cavity body in an upward direction; one or more cavity cover cylindrical battery cavities can be simultaneously combined with one or more cavity body cylindrical battery cavities to form one or more sealed cavities for one or more cylindrical battery sleeves to be provided for helium detection; one or more cavity cover gate valves are fixed on the cavity cover in a side-by-side manner and are in communication with one or more cavity cover cylindrical battery cavities; the cavity cover pipeline is connected to one or more cavity cover gate valves; the vacuumizing gate valve, the helium detection gate valve, the cleaning gate valve, the vacuum gauge and the venting gate valve are connected to the cavity cover pipeline for detecting the vacuum degree in one or more sealed cavities; the muffler is connected to another interface of the venting gate valve for connecting one or more sealed cavities to the atmosphere; another interface of the vacuumizing gate valve is provided as a cavity cover vacuumizing pipeline interface for vacuumizing the sealed cavities; another interface of the helium detection gate valve is provided as a cavity cover helium detection pipeline interface for pumping out the sealed cavities for helium detection; another interface of the cleaning gate valve is provided as a cleaning pipeline interface for introducing cleaning gas into the sealed cavities to clean possible leaked helium.

[0019] Further, the cavity cover cleaning mechanism comprises a cavity cover cleaning support, four cavity cover cleaning sliding sleeves, four cavity cover cleaning sliding rods, a cavity cover cleaning lifting driver, a cavity cover cleaning sliding plate, a cavity cover cleaning box, one or more cavity cover cleaning exhaust pipes, one or more cavity cover cleaning electric brushes and a cavity cover cleaning gas joint; the cavity cover cleaning support comprises a cavity cover cleaning support bottom plate, four cavity cover cleaning support columns and a cavity cover cleaning support top plate, the cavity cover cleaning support bottom plate is fixed on the output end of the linear module and located beside the cavity mechanism, the four cavity cover cleaning support columns are fixed on the four corners of the cavity cover cleaning support bottom plate, the cavity cover cleaning support top plate is fixed on the top of the four cavity cover cleaning support columns, the four cavity cover cleaning sliding sleeves are fixed on the four corners of the cavity cover cleaning support top plate, the four cavity cover cleaning sliding rods are respectively sleeved in the four cavity cover cleaning sliding sleeves, the cavity cover cleaning lifting driver is vertically fixed upwards on the cavity cover cleaning support top plate, the cavity cover cleaning sliding plate is fixed on the top of the four cavity cover cleaning sliding rods and the output end of the cavity cover cleaning lifting driver, the cavity cover cleaning box is fixed on the cavity cover cleaning sliding plate, the one or more cavity cover cleaning exhaust pipes are fixed in the top middle part of the cavity cover cleaning box with the openings upwards, the number of the one or more cavity cover cleaning exhaust pipes is the same as that of the one or more cavity cover cylindrical battery cavities in the cavity middle part and can be aligned, the one or more cavity cover cleaning electric brushes are fixed in the cavity cover cleaning box, the brush heads of the one or more cavity cover cleaning electric brushes respectively extend out of the opening ends of the one or more cavity cover cleaning exhaust pipes, the cavity cover cleaning gas joint is fixed outside the cavity cover cleaning box and communicates with the one or more cavity cover cleaning exhaust pipes; the height and span of the four cavity cover cleaning support columns match those of the four cavity cover support columns, so that the linear module can move to the cavity mechanism below with the cavity cover cleaning mechanism, and the cavity cover cleaning lifting driver is used to drive the cavity cover cleaning sliding plate to lift the cavity cover cleaning box together with the one or more cavity cover cleaning electric brushes along the cavity cover cleaning sliding sleeves, so that the brush heads of the one or more cavity cover cleaning electric brushes respectively enter the one or more cavity cover cylindrical battery cavities and simultaneously brush the one or more cavity cover cylindrical battery cavities, and the opening ends of the one or more cavity cover cleaning exhaust pipes also respectively enter the one or more cavity cover cylindrical battery cavities to exhaust and remove the brushed dust and possible helium.

[0020] The cylindrical battery helium detection sealing device has the beneficial effects that the linear module moves to the cavity mechanism below with the cavity cover cleaning mechanism to cover and form one or more sealed cavities for one or more cylindrical batteries to simultaneously perform helium detection. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of the cylindrical battery helium detection sealing device.

[0022] Figure 2 Cavity mechanism structure diagram;

[0023] Figure 3 Cavity cover mechanism structure diagram;

[0024] Figure 4 Cavity cover assembly top view structure diagram;

[0025] Figure 5 Cavity cover assembly bottom view structure diagram;

[0026] Figure 6 Cavity cover cleaning mechanism structure diagram.

[0027] Explanation of reference signs:

[0028] 10, cylindrical battery;

[0029] 600, cylindrical battery helium detection sealing device;

[0030] 610, linear module;

[0031] 620, cavity mechanism; 621, cavity support; 6211, cavity support bottom plate; 6212, cavity support column; 6213, cavity support top plate; 622, cavity sliding sleeve; 623, cavity lifting driver; 624, cavity sliding plate; 625, cavity; 6251, cavity body; 6252, cavity cylindrical battery cavity; 6253, cavity sealing ring groove; 626, cavity sealing ring; 627, cylindrical battery pair of radiation inductors;

[0032] 630, cavity cover mechanism; 631, cavity cover support; 6311, cavity cover support bottom plate; 6312, cavity cover support column; 6313, cavity cover support top plate; 632, cavity cover assembly; 6321, cavity cover; 63211, cavity cover cylindrical battery cavity; 6322, cavity cover gate valve; 6323, cavity cover pipeline; 6324, vacuumizing gate valve; 63241, cavity cover vacuumizing pipeline interface; 6325, helium detection gate valve; 63251, cavity cover helium detection pipeline interface; 6326, cleaning gate valve; 63261, cleaning pipeline interface; 6327, vacuum gauge; 6328, emptying gate valve; 6329, silencer;

[0033] 640, cavity cover cleaning mechanism; 641, cavity cover cleaning support; 6411, cavity cover cleaning support bottom plate; 6412, cavity cover cleaning support column; 6413, cavity cover cleaning support top plate; 642, cavity cover cleaning sliding sleeve; 643, cavity cover cleaning sliding rod; 644, cavity cover cleaning lifting driver; 645, cavity cover cleaning sliding plate; 646, cavity cover cleaning box; 647, cavity cover cleaning exhaust pipe; 648, cavity cover cleaning electric brush; 649, cavity cover cleaning gas joint;

[0034] 650, loading and unloading position;

[0035] 660, detection position. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0037] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not used to indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model; the terms "first", "second", "third" are only used for description purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two components. For ordinary skilled persons in the art, the specific meaning of the terms in the utility model can be understood according to the specific circumstances.

[0038] Referring to Figure 1 The embodiment provides a cylindrical battery helium detection sealing device 600 for sealing detection of a cylindrical battery, which comprises

[0039] The linear module 610 is horizontally fixed on the external machine table, the right end is provided as the loading and unloading position 650, and the left end is provided as the detection position 660; the output end of the linear module 610 can move linearly between the loading and unloading position 650 and the detection position 660;

[0040] The cavity mechanism 620 is fixed on the output end of the linear module 610;

[0041] The cavity cover mechanism 630 is fixed on the external machine table, located at the detection position 660 and above the cavity mechanism 620;

[0042] The cavity cover cleaning mechanism 640 is fixed on the output end of the linear module 610 and located beside the cavity cover mechanism 630; the center line of the cavity cover cleaning mechanism 640 coincides with the center line of the cavity cover mechanism 630 in the linear direction of the output end of the linear module 610;

[0043] The linear module 610 moves the cavity mechanism 620 under the cavity cover mechanism 630 to cover and form four sealed cavities for four cylindrical batteries 10 to simultaneously perform helium detection; the linear module 610 moves the cavity cover cleaning mechanism 640 under the cavity cover mechanism 630 to cover the cavity cover part of the sealed cavity of the cavity cover mechanism 630 for cleaning.

[0044] Further, referring to Figure 2 The cavity mechanism 620 includes a cavity support 621, four cavity sliding sleeves 622, a cavity lifting driver 623, a cavity sliding plate 624, a cavity 625, four cavity sealing rings 626, and four pairs of cylindrical battery pair radiation sensors 627.

[0045] The cavity support 621 includes a cavity support bottom plate 6211, four cavity support columns 6212, and a cavity support top plate 6213. The cavity support bottom plate 6211 is fixed on the output end of the linear module 610. The four cavity support columns 6212 are fixed on the four corners of the cavity support bottom plate 6211. The cavity support top plate 6213 is fixed on the top of the four cavity support columns 6212. The cavity support top plate 6213 is a frame with a hollow middle part. The four cavity sliding sleeves 622 are respectively sleeved on the outside of the four cavity support columns 6212. The cavity lifting driver 623 is fixed on the cavity support bottom plate 6211. The cavity sliding plate 624 is fixed on the four cavity sliding sleeves 622 and the output end of the cavity lifting driver 623. The cavity 625 includes a cavity body 6251, four cavity cylindrical battery cavities 6252, and four cavity sealing ring grooves 6253. The cavity body 6251 is fixed on the cavity sliding plate 624 and located in the hollow middle part of the cavity support top plate 6213. The cavity body 6251 has four cavity cylindrical battery cavities 6252 arranged side by side and upward in the middle part. Each cavity cylindrical battery cavity 6252 has a cavity sealing ring groove 6253 around the opening. The four cavity sealing rings 626 are respectively located in the four cavity sealing ring grooves 6253 of the four cavity cylindrical battery cavities 6252. The four pairs of cylindrical battery pair radiation sensors 627 are respectively arranged and fixed on the frame edges of the cavity support top plate 6213 and respectively located on both sides of the four cavity cylindrical battery cavities 6252 to respectively face one cylindrical battery 10 in each of the four cavity cylindrical battery cavities 6252. The cavity lifting driver 623 is used to drive the cavity sliding plate 624 to lift the cavity 625 along the cavity support columns 6212 to cover and form four sealed cavities with the cavity cover mechanism 630 for the cylindrical batteries 10 to simultaneously perform helium detection.

[0046] Further, referring to Figure 3The cavity cover mechanism 630 comprises a cavity cover support 631 and a cavity cover assembly 632. The cavity cover support 631 comprises a cavity cover support bottom plate 6311, four cavity cover support columns 6312, and a cavity cover support top plate 6313. The cavity cover support bottom plate 6311 is fixed on the external machine and located at the detection position 660. The four cavity cover support columns 6312 are fixed on the four corners of the cavity cover support bottom plate 6311. The cavity cover support top plate 6313 is fixed on the top of the four cavity cover support columns 6312. The cavity cover support top plate 6313 is a frame with a hollowed-out middle part. The cavity cover assembly 632 passes through the hollowed-out middle part of the cavity cover support top plate 6313 and is fixed on the frame of the cavity cover support top plate 6313. The height and span of the four cavity cover support columns 6312 match the height and span of the four cavity support columns 6212, so that the linear module 610 can move the cavity mechanism 620 to the cavity cover mechanism 630 to cover and form four sealed cavities for helium detection of the four cylindrical batteries 10 at the same time.

[0047] Further, referring to Figure 4 and Figure 5 The cavity cover assembly 632 comprises a cavity cover 6321, four cavity cover gate valves 6322, a cavity cover pipeline 6323, a vacuum pumping gate valve 6324, a helium detection gate valve 6325, a cleaning gate valve 6326, a vacuum gauge 6327, an emptying gate valve 6328, and a silencer 6329. The cavity cover 6321 is fixed on the cavity cover support top plate 6313. The cavity cover 6321 has four cavity cover cylindrical battery cavities 63211 in the middle part, which are aligned with the four cavity body cylindrical battery cavities 6252 in the middle part of the cavity body 6251 and face downward. The four cavity cover cylindrical battery cavities 63211 can cover and form four sealed cavities with the four cavity body cylindrical battery cavities 6252 at the same time for helium detection of the four cylindrical batteries 10.

[0048] Further, referring to Figure 6The cavity cover cleaning mechanism 640 comprises a cavity cover cleaning support 641, four cavity cover cleaning sliding sleeves 642, four cavity cover cleaning sliding rods 643, a cavity cover cleaning lifting driver 644, a cavity cover cleaning sliding plate 645, a cavity cover cleaning box 646, four cavity cover cleaning exhaust pipes 647, four cavity cover cleaning electric brushes 648 and a cavity cover cleaning gas joint 649. The cavity cover cleaning support 641 comprises a cavity cover cleaning support bottom plate 6411, four cavity cover cleaning support stand columns 6412 and a cavity cover cleaning support top plate 6413. The cavity cover cleaning support bottom plate 6411 is fixed on the output end of the linear module 610 and located beside the cavity cover mechanism 630. The four cavity cover cleaning support stand columns 6412 are fixed on the four corners of the cavity cover cleaning support bottom plate 6411. The cavity cover cleaning support top plate 6413 is fixed on the top of the four cavity cover cleaning support stand columns 6412. The four cavity cover cleaning sliding sleeves 642 are fixed on the four corners of the cavity cover cleaning support top plate 6413. The four cavity cover cleaning sliding rods 643 are respectively sleeved in the four cavity cover cleaning sliding sleeves 642. The cavity cover cleaning lifting driver 644 is vertically fixed upwards on the cavity cover cleaning support top plate 6413. The cavity cover cleaning sliding plate 645 is fixed on the top of the four cavity cover cleaning sliding rods 643 and the output end of the cavity cover cleaning lifting driver 644. The cavity cover cleaning box 646 is fixed on the cavity cover cleaning sliding plate 645. The four cavity cover cleaning exhaust pipes 647 are fixed in a side-by-side manner with the opening upwards on the top middle part of the cavity cover cleaning box 646, and the number of the four cavity cover cylindrical battery cavities 63211 in the middle part of the cavity cover 6321 is the same as that of the four cavity cover cleaning exhaust pipes 647 and can be aligned. The four cavity cover cleaning electric brushes 648 are fixed in the cavity cover cleaning box 646. The brush heads of the four cavity cover cleaning electric brushes 648 respectively extend out of the opening ends of the four cavity cover cleaning exhaust pipes 647. The cavity cover cleaning gas joint 649 is fixed outside the cavity cover cleaning box 646 and communicates with the four cavity cover cleaning exhaust pipes 647. The height and span of the four cavity cover cleaning support stand columns 6412 are matched with the height and span of the four cavity cover support stand columns 6312, so that the linear module 610 can move to the cavity cover mechanism 630 with the cavity cover cleaning mechanism 640. The cavity cover cleaning lifting driver 644 is used to drive the cavity cover cleaning sliding plate 645 to lift the cavity cover cleaning box 646 together with the four cavity cover cleaning electric brushes 648 along the cavity cover cleaning sliding sleeves 642, so that the brush heads of the four cavity cover cleaning electric brushes 648 respectively enter the four cavity cover cylindrical battery cavities 63211 and simultaneously brush the four cavity cover cylindrical battery cavities 63211. At the same time, the opening ends of the four cavity cover cleaning exhaust pipes 647 also respectively enter the four cavity cover cylindrical battery cavities 63211 to exhaust and discharge the brushed dust and possible helium.

[0049] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cylindrical battery helium detection sealing device (600) for detecting the sealing of cylindrical batteries, characterized in that it comprises a linear module (610) horizontally fixed on an external machine table, with a right end as an upper and lower position (650) and a left end as a detection position (660), the output end of the linear module (610) being capable of moving linearly between the upper and lower position (650) and the detection position (660); a cavity mechanism (620) fixed on the output end of the linear module (610); a cavity cover mechanism (630) fixed on the external machine table, located at the detection position (660) and above the cavity mechanism (620); a cavity cover cleaning mechanism (640) fixed on the output end of the linear module (610), located beside the cavity cover mechanism (630), the center line of the cavity cover cleaning mechanism (640) coinciding with the center line of the cavity cover mechanism (630) in the linear direction of the output end of the linear module (610) moving; the linear module (610) moves with the cavity mechanism (620) to the cavity cover mechanism (630) below to cover and form one or more sealing cavities for one or more cylindrical batteries (10) to simultaneously perform helium detection; the linear module (610) moves with the cavity cover cleaning mechanism (640) to the cavity cover mechanism (630) below to cover for cleaning the cavity cover part of the sealing cavity of the cavity cover mechanism (630).

2. The cylindrical battery helium leak tightness sealing device (600) according to claim 1, characterized in that, the cavity mechanism (620) comprises a cavity support (621), four cavity sliding sleeves (622), a cavity lifting driver (623), a cavity sliding plate (624), a cavity (625), one or more cavity sealing rings (626), and one or more pairs of cylindrical battery pair emission sensors (627). The cavity support (621) comprises a cavity support bottom plate (6211), four cavity support columns (6212) and a cavity support top plate (6213), the cavity support bottom plate (6211) is fixed on the output end of the linear module (610); four cavity support columns (6212) are fixed on the four corners of the cavity support bottom plate (6211), the cavity support top plate (6213) is fixed on the top of the four cavity support columns (6212), and the cavity support top plate (6213) is a frame with a hollow middle part; four cavity sliding sleeves (622) are respectively sleeved outside the four cavity support columns (6212), the cavity lifting driver (623) is fixed on the cavity support bottom plate (6211), the cavity sliding plate (624) is fixed on the four cavity sliding sleeves (622) and the output end of the cavity lifting driver (623), the cavity (625) comprises a cavity body (6251), one or more cavity cylindrical battery cavities (6252) and one or more cavity sealing ring grooves (6253), the cavity body (6251) is fixed on the cavity sliding plate (624) and located in the hollow middle part of the cavity support top plate (6213), one or more cavity cylindrical battery cavities (6252) are arranged side by side upwards in the middle part of the cavity body (6251), and one cavity sealing ring groove (6253) is arranged around the opening of each cavity cylindrical battery cavity (6252); one or more cavity sealing rings (626) are respectively located in the cavity sealing ring grooves (6253) of the one or more cavity cylindrical battery cavities (6252), and one or more pairs of cylindrical battery opposite-injection inductors (627) are arranged and fixed on the frame edges of the cavity support top plate (6213), are located on the two sides of the one or more cavity cylindrical battery cavities (6252), and are respectively opposite to one cylindrical battery (10) contained in the one or more cavity cylindrical battery cavities (6252); the cavity lifting driver (623) is used for driving the cavity sliding plate (624) to ascend along the cavity support columns (6212) with the cavity (625) and cover the cavity cover mechanism (630) to form one or more sealed cavities for the cylindrical batteries (10) to simultaneously perform helium detection.

3. The cylindrical battery helium leak tightness sealing device (600) according to claim 2, characterized in that, The cavity cover mechanism (630) comprises a cavity cover support (631) and a cavity cover assembly (632), the cavity cover support (631) comprises a cavity cover support bottom plate (6311), four cavity cover support columns (6312) and a cavity cover support top plate (6313), the cavity cover support bottom plate (6311) is fixed on the external machine and located at the detection position (660), the four cavity cover support columns (6312) are fixed on the four corners of the cavity cover support bottom plate (6311), the cavity cover support top plate (6313) is fixed on the top of the four cavity cover support columns (6312), the cavity cover support top plate (6313) is a frame with a hollow middle part, the cavity cover assembly (632) passes through the hollow area in the middle part of the cavity cover support top plate (6313) and is fixed on the frame of the cavity cover support top plate (6313); the height and span of the four cavity cover support columns (6312) match the height and span of the four cavity body support columns (6212), so that the linear module (610) can move with the cavity mechanism (620) to the cavity cover mechanism (630) to cover and form one or more sealed cavities for one or more cylindrical batteries (10) to simultaneously perform helium detection.

4. The cylindrical battery helium leak tightness sealing device (600) according to claim 3, characterized in that, The cavity cover assembly (632) comprises a cavity cover (6321), one or more cavity cover gate valves (6322), a cavity cover pipeline (6323), a vacuumizing gate valve (6324), a helium detection gate valve (6325), a cleaning gate valve (6326), a vacuum gauge (6327), a venting gate valve (6328) and a muffler (6329); the cavity cover (6321) is fixed on the cavity cover support top plate (6313), and a middle part of the cavity cover (6321) is provided with one or more cavity cover cylindrical battery cavities (63211) facing downward in parallel, which are the same in number as and aligned with one or more cavity body cylindrical battery cavities (6252) facing upward in parallel provided in a middle part of the cavity body (6251); one or more cavity cover cylindrical battery cavities (63211) can simultaneously cover one or more cavity body cylindrical battery cavities (6252) to form one or more sealed cavities for one or more cylindrical batteries (10) to be sleeved for helium detection; one or more cavity cover gate valves (6322) are fixed in parallel on the cavity cover (6321) and communicate with one or more cavity cover cylindrical battery cavities (63211); the cavity cover pipeline (6323) communicates with one or more cavity cover gate valves (6322); the vacuumizing gate valve (6324), the helium detection gate valve (6325), the cleaning gate valve (6326), the vacuum gauge (6327) and the venting gate valve (6328) communicate with the cavity cover pipeline (6323) and are used for detecting vacuum degrees in one or more sealed cavities; the muffler (6329) communicates with another interface of the venting gate valve (6328) and is used for connecting one or more sealed cavities with the atmosphere; another interface of the vacuumizing gate valve (6324) is provided with a cavity cover vacuumizing pipeline interface (63241) for vacuumizing the sealed cavities; another interface of the helium detection gate valve (6325) is provided with a cavity cover helium detection pipeline interface (63251) for helium detection by vacuumizing the sealed cavities; another interface of the cleaning gate valve (6326) is provided with a cleaning pipeline interface (63261) for cleaning possible leaked helium in the sealed cavities by introducing cleaning gas.

5. The cylindrical battery helium leak tight seal (600) of claim 4, wherein, The cavity cover cleaning mechanism (640) comprises a cavity cover cleaning support (641), four cavity cover cleaning sliding sleeves (642), four cavity cover cleaning sliding rods (643), a cavity cover cleaning lifting driver (644), a cavity cover cleaning sliding plate (645), a cavity cover cleaning box (646), one or more cavity cover cleaning exhaust pipes (647), one or more cavity cover cleaning electric brushes (648) and a cavity cover cleaning gas joint (649); the cavity cover cleaning support (641) comprises a cavity cover cleaning support bottom plate (6411), four cavity cover cleaning support stand columns (6412) and a cavity cover cleaning support top plate (6413), the cavity cover cleaning support bottom plate (6411) is fixed on the output end of the linear module (610) and located beside the cavity cover mechanism (630), the four cavity cover cleaning support stand columns (6412) are fixed on the four corners of the cavity cover cleaning support bottom plate (6411), the cavity cover cleaning support top plate (6413) is fixed on the top of the four cavity cover cleaning support stand columns (6412), the four cavity cover cleaning sliding sleeves (642) are fixed on the four corners of the cavity cover cleaning support top plate (6413), the four cavity cover cleaning sliding rods (643) are respectively sleeved in the four cavity cover cleaning sliding sleeves (642), the cavity cover cleaning lifting driver (644) is vertically upwardly fixed on the cavity cover cleaning support top plate (6413), the cavity cover cleaning sliding plate (645) is fixed on the top of the four cavity cover cleaning sliding rods (643) and the output end of the cavity cover cleaning lifting driver (644), the cavity cover cleaning box (646) is fixed on the cavity cover cleaning sliding plate (645), one or more cavity cover cleaning exhaust pipes (647) are fixed in a side-by-side manner with the opening upward on the top middle part of the cavity cover cleaning box (646), the number of the one or more cavity cover cleaning exhaust pipes (647) is the same as that of the one or more cavity cover cylindrical battery cavities (63211) arranged in the middle part of the cavity cover (6321) and can be aligned, one or more cavity cover cleaning electric brushes (648) are fixed in the cavity cover cleaning box (646), the brush heads of the one or more cavity cover cleaning electric brushes (648) respectively extend out of the opening ends of the one or more cavity cover cleaning exhaust pipes (647), and the cavity cover cleaning gas joint (649) is fixed outside the cavity cover cleaning box (646) and communicates with the one or more cavity cover cleaning exhaust pipes (647).The height and span of the four cavity cover cleaning support columns (6412) match those of the four cavity cover support columns (6312), allowing the linear module (610) to move the cavity cover cleaning mechanism (640) under the cavity cover mechanism (630). The cavity cover cleaning lifting driver (644) is used to drive the cavity cover cleaning sliding plate (645) to lift the cavity cover cleaning box (646) along with one or more cavity cover cleaning electric brushes (648) along the cavity cover cleaning sliding sleeve (642), so that the brush heads of one or more cavity cover cleaning electric brushes (648) respectively enter one or more cavity cover cylindrical battery cavities (63211) and simultaneously brush one or more cavity cover cylindrical battery cavities (63211), while the open ends of one or more cavity cover cleaning exhaust pipes (647) also respectively enter one or more cavity cover cylindrical battery cavities (63211) to exhaust the brushed dust and possible helium gas.

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