Four-channel multi-compatible-blade battery shell helium detection device

Abstract

The invention belongs to the technical field of lithium battery shell welding seam detection, and relates to a four-channel multi-compatible blade battery shell helium detection device which comprises a rack, a helium detection mass spectrometer, a shell conveying line, an upper die pressing assembly, a jacking centering assembly, two side supporting assemblies and a lower die moving assembly. The upper die pressing assembly, the jacking centering assembly, the two side supporting assemblies and the lower die moving assembly are all fixed to the rack. A shell is conveyed to a helium detection position through a conveying line, the jacking centering assembly carries out jacking and centering actions, then side pushing centering plates of the supporting assemblies on the two sides carry out left-right centering, then the lower mold moving assembly moves a lower mold and jacks the lower mold to the floating air nozzle assembly to make the lower mold assembly in place, and finally an upper mold pressing assembly air cylinder carries out pressing sealing and helium detection. According to the invention, a manual operation mode is solved, full automatic helium detection can be realized, helium detection can be simultaneously carried out on four channels at a time, the efficiency is improved, products of various specifications can be tested in a compatible manner, and only corresponding parts need to be replaced.

Description

Technical Field

[0001] The present invention belongs to the technical field of weld detection for lithium battery casings, and particularly relates to a four-channel multi-compatible helium leak detection device for blade battery casings. Background Art

[0002] The blade battery casing is formed by bending very thin aluminum plates, followed by high-frequency welding and then cutting into sections. During high-frequency welding, there is a probability that the welds are not completely sealed. Therefore, after being cleaned by a cleaning machine, it is necessary to conduct further detection. Usually, the detection method is helium leak detection, and the detection methods are more or less the same. Due to the long length and narrow width of the blade battery casing, currently, most of the weld detection operations are manual. Usually, a simple sealing device is used for helium leak detection operations, and the detection time is long, requiring repeated manual operations, resulting in low efficiency.

[0003] Therefore, a new four-channel multi-compatible helium leak detection device for blade battery casings is needed to improve the above-mentioned device. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a four-channel multi-compatible helium leak detection device for blade battery casings, which has the advantages of automatic helium leak detection, simultaneous helium leak detection of four channels at a time, greatly improving production capacity. At the same time, it can also be compatible with multiple specifications of products for testing, only by replacing corresponding parts, etc., and solves the problems of long existing detection time, need for repeated manual operations, and low efficiency.

[0005] To achieve the above purpose of automatic helium leak detection, the present invention provides the following technical solution: A four-channel multi-compatible helium leak detection device for blade battery casings, including a large frame plate. A control center is provided at the bottom of the large frame plate, a support assembly is provided at the top of the large frame plate, a lifting and centering assembly is provided at the top of the large frame plate, an upper die pressing assembly is provided at the top of the support assembly, a lower die moving assembly is provided on one side of the upper die pressing assembly, and a blade battery casing body is provided at the bottom.

[0006] The upper die pressing-down assembly includes columns, an upper die sealing assembly, first guide rods, first linear bearings, an upper die mounting plate, a pressing-down cylinder, quick-release fixing blocks, first mounting rods, a first mounting plate, a fan, and a first floating joint. The upper ends of the columns are fixed on the upper die mounting plate, and the other ends are connected and locked to the large frame plate by screws. On the upper die mounting plate, there are 8 pressing-down cylinders and 8 first linear bearings fixed above it. The 8 pressing-down cylinders are grouped in pairs of 2. The upper die sealing assembly is fixed by connecting it with 2 first guide rods and 2 first floating joints. The upper die sealing assembly moves up and down through the telescopic movement of the pressing-down cylinder. The fan is fixed on the first mounting plate by screws. The first mounting plate is fixed on 2 first mounting rods by screws. The 2 first mounting rods are fixed by a set of quick-release fixing blocks, and the set of quick-release fixing blocks is fixed on the side of the upper die mounting plate by screws.

[0007] Further, the upper die sealing assembly includes an upper die mounting seat, an upper die plate, an upper die sealing ring, a pressing plate, a pressing head, equal-height screws, and a quick connector. The upper die plate is fixed on the upper die mounting seat by screws. The upper die sealing ring is fixed on the upper die plate by the pressing plate. The 6 quick-release pressing heads are fixed on the upper die mounting seat by equal-height screws for pressing the pressing plate to facilitate the replacement and cleaning of the upper die sealing ring during subsequent debugging. The quick connector is fixedly connected to one side of the helium leak detection mass spectrometer.

[0008] Further, the jacking and centering assembly includes a first telescopic cylinder, a transition plate, a second floating joint, a second telescopic cylinder, a first sliding rod, a first fixing plate, a side-pushing cylinder, a second cylinder mounting plate, a second sliding rod, a second mounting plate, a third mounting plate, a first centering plate, a reference block, a first cylinder mounting plate, a third sliding rod, and a third linear bearing. The jacking and centering assembly is used for jacking the housing to avoid interference and centering the housing. The second telescopic cylinder is fixed on the bottom of the large frame plate by screws. The first telescopic cylinder is fixed under the transition plate by screws. The lower ends of the 4 first sliding rods are fixed on the transition plate, and the upper ends are fixed to 2 first fixing plates. The first telescopic cylinder and the second telescopic cylinder are connected to each other through the second floating joint. The overall lifting of the upper part is mainly carried out through the telescopic movement of the first telescopic cylinder and the second telescopic cylinder. The third linear bearing is fixedly sleeved on the fixing plate. The 2 side-pushing cylinders are respectively fixed on one side of the first cylinder mounting plate and the second cylinder mounting plate by screws. The first centering plate and the reference block are grouped in pairs of two and are respectively fixed on the first cylinder mounting plate, the second mounting plate, and the third mounting plate by screws. The 2 third sliding rods and the 2 second sliding rods slide on the inner and outer sides respectively through the third linear bearing. When the side-pushing cylinder extends, the sliding on the inner and outer sides is a relative movement, so as to achieve the centering effect.

[0009] Furthermore, the support assembly includes a support plate, a bearing mounting rod, a support bearing, a cylinder fixing plate, a first fixing rod, a floating nozzle assembly, a third floating joint, a first cylinder, a first guiding bearing, a bearing fixing rod, a first fixing ring, a fourth linear bearing, a second fixing plate, a stainless steel spring, a side pushing and centering plate, and a second guiding rod. The two support plates are fixedly connected to the large frame plate by screws. The eight support bearings are fixed to the support plates through the bearing mounting rods. The four sets of floating nozzle assemblies are fixedly connected to one side of the first fixing rod by screws. The first fixing rod is fixed to the column. The first cylinder is fixedly connected to the cylinder fixing plate by screws. The cylinder fixing plate is fixed to the support plate. The side pushing and centering plate is connected to the first cylinder through the third floating joint. The second guiding rod is guided by the fourth linear bearing to prevent the side pushing and centering plate from being non-parallel left and right due to its excessive length. The side pushing and centering plate is mainly used to flatten the shell to ensure consistency front and back. The bearing fixing rod is fixedly connected to the bearing mounting rod by screws. Two sets of guiding bearings are grouped together and are mainly used to guide the incoming lower die and block the tilting force caused by the relative parallelism problem of the upper and lower dies when the upper die presses down.

[0010] Furthermore, the floating nozzle assembly includes a first fixing block, a first spring, a helium spraying nozzle, a first sealing ring, a second fixing ring, an elbow, and an oil-free bushing. The support assembly is used to support the lower die assembly and align the front and back positions of the shell. The floating nozzle is used to buffer the inertial force of the rapid movement of the lower die to achieve better sealing. The floating nozzle assembly mainly relies on the helium spraying nozzle to slide back and forth through the oil-free bushing. The first spring provides elastic force to offset the impact force after the lower die reaches its position. The elbow is used to connect the helium gas cylinder and convey helium gas to the helium detection cavity of the lower die.

[0011] Furthermore, the lower die moving assembly includes a fixing frame, a drag chain body, a drag chain fixing plate, a drag chain mounting plate, a servo motor, a reducer, a motor mounting plate, a coupling, a driving wheel mounting seat, a driving wheel body, a fixing seat, a fifth linear bearing, a third guiding rod, a lower die sealing assembly, a driven wheel fixing block, a driven wheel body, a synchronous belt, and a third fixing plate. The fixing frame is fixedly connected to the frame by screws. The fixing seat is fixed to the fixing frame. The forward and backward movement of the lower die sealing assembly is mainly provided by the synchronous belt for transmission, and its horizontal movement is ensured by two third guiding rods.

[0012] Furthermore, the lower die sealing assembly includes a lower die fixing plate, a lower die body, a lower die sealing ring, a joint body, a third fixing ring, a sliding block, a connecting plate, a connecting shaft and a connecting block. The lower die moving assembly is used to move the lower die. The lower die sealing assembly is mainly composed of 4 sets of lower die bodies. The lower die bodies are fixedly connected to the lower die fixing plate by screws. The lower die sealing ring is fixed in the lower die body groove by extrusion. The joint body is mainly connected to a vacuum pump to extract air from the lower die cavity and remove helium. The other end of the lower die contacts the floating nozzle assembly to conduct helium. During operation, when the lower die is inserted into the shell and the upper die is in the downward pressing state, the lower die sealing ring in the lower die groove will form a relatively sealed space. When helium is introduced, the helium will fill a closed lower die cavity, which is the function of the lower die.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. When the present invention is in use, by setting the first centering plate and starting the lifting centering assembly to clamp 4 blade battery housing bodies at the same time, and cooperating with the quick connector, helium leak detection can be carried out simultaneously in four channels at a time, greatly improving the production capacity and solving the problem of low efficiency in the existing detection method that requires manual repeated detection.

[0015] 2. When the present invention is in use, by setting the support assembly, when helium leak detection needs to be carried out on blade battery housing bodies of different models and specifications, only local parts need to be replaced to perform helium leak detection on blade battery housing bodies of different models. It has the advantage of being compatible with multiple specifications of products for testing. And the inertial force of the rapid movement of the lower die is buffered by the floating nozzle, achieving better sealing. The impact force after the lower die arrives is offset by the elastic force provided by the first spring, extending the service life of the equipment. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the main structure of a four-channel multi-compatible blade battery housing helium leak detection device;

[0018] Figure 2 It is a schematic diagram of the partial structure of a four-channel multi-compatible blade battery housing helium leak detection device;

[0019] Figure 3 It is a schematic diagram of the main structure of the upper die downward pressing assembly of the present invention;

[0020] Figure 4 It is a schematic diagram of the partial structure of the upper die downward pressing assembly of the present invention.

[0021] Figure 5 Schematic diagram of the main structure of the jacking and centering component of the present invention;

[0022] Figure 6 Schematic diagram of the main structure of the support component of the present invention.

[0023] Figure 7 Schematic diagram of the main structure of the floating joint of the present invention.

[0024] Figure 8 Schematic diagram of the main structure of the lower die moving component of the present invention;

[0025] Figure 9 Partial structure schematic diagram of the lower die moving component of the present invention.

[0026] In the figure: 1. Large frame plate; 2. Control center; 3. Blade battery housing body; 4. Upper die pressing-down assembly; 41. Column; 42. Upper die sealing assembly; 421. Upper die mounting seat; 422. Upper template; 423. Upper die sealing ring; 424. Pressing plate; 4261. Pressing head; 4263. Equal-height screw; 428. Quick connector; 43. First guiding rod; 44. First linear bearing; 45. Upper die mounting plate; 46. Pressing-down cylinder; 47. Quick-release fixing block; 48. First mounting rod; 49. First mounting plate; 410. Fan; 411. First floating joint; 5. Lifting and centering assembly; 51. Telescopic cylinder 1; 52. Transition plate; 53. Second floating joint; 54. Telescopic cylinder 2; 55. First sliding rod; 58. First fixing plate; 59. Side-pushing cylinder; 510. Cylinder mounting plate 2; 511. Second sliding rod; 512. Second mounting plate; 513. Third mounting plate; 514. First centering plate; 515. Reference block; 516. Cylinder mounting plate 1; 517. Third sliding rod; 518. Third linear bearing; 6. Support assembly; 61. Support plate; 62. Bearing mounting rod; 63. Support bearing; 64. Cylinder fixing plate; 65. First fixing rod; 66. Floating nozzle assembly; 661. First fixing block; 662. First spring; 663. Helium spraying nozzle; 664. First sealing ring; 665. Second fixing ring; 666. Elbow; 667. Oil-free bushing; 67. Third floating joint; 68. First cylinder; 691. Guide bearing; 692. Bearing fixing rod; 693. First fixing ring; 610. Fourth linear bearing; 611. Second fixing plate; 612. Stainless steel spring; 613. Side-pushing centering plate; 614. Second guiding rod; 7. Lower die moving assembly; 71. Fixed frame; 72. Drag chain body; 73. Drag chain fixing plate; 74. Drag chain mounting plate; 75. Servo motor; 76. Reducer; 77. Motor mounting plate; 78. Coupling; 79. Driving wheel mounting seat; 710. Driving wheel body; 711. Fixed seat; 712. Fifth linear bearing; 713. Third guiding rod; 714. Lower die sealing assembly; 7141. Lower die fixing plate; 7142. Lower die body; 7143. Lower die sealing ring; 7144. Joint body; 7145. Third fixing ring; 7146. Sliding block; 7147. Connecting plate; 7148. Connecting shaft; 7149. Connecting block; 715. Driven wheel fixing block; 716. Driven wheel body; 717. Synchronous belt; 718. Third fixing plate. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 9 , the present invention provides a technical solution: a four-channel multi-compatible blade battery case helium leak detection device, including a frame large plate 1, a control center 2 is arranged at the bottom of the frame large plate 1, a support assembly 6 is arranged at the top of the frame large plate 1, a jacking and centering assembly 5 is arranged at the top of the frame large plate 1, an upper die pressing assembly 4 is arranged at the top of the support assembly 6, a lower die moving assembly 7 is arranged on one side of the upper die pressing assembly 4, and a blade battery case body 3 is arranged at the bottom of the upper die pressing assembly 4;

[0029] As Figure 3 , Figure 4 shown, the upper die pressing assembly 4 includes a column 41, an upper die sealing assembly 42, a first guide rod 43, a first linear bearing 44, an upper die mounting plate 45, a downward pressing cylinder 46, a quick-release fixing block 47, a first mounting rod 48, a first mounting plate 49, a fan 410 and a first floating joint 411.

[0030] Column 41: One end is fixed on the upper die mounting plate 45, and the other end is connected and locked to the frame large plate 1 by screws.

[0031] Upper die mounting plate 45: 8 downward pressing cylinders 46 and 8 first linear bearings 44 are fixed above, and the 8 downward pressing cylinders 46 are divided into 4 groups, with 2 in each group.

[0032] Downward pressing cylinder 46: Used to push the upper die sealing assembly 42 to move up and down.

[0033] First guide rod 43 and first floating joint 411: Both are connected to the upper die sealing assembly 42, playing a role of fixation and guidance.

[0034] Upper die sealing assembly 42: Includes an upper die mounting seat 421, an upper template 422, an upper die sealing ring 423, a pressing plate 424, a pressing head 4261, an equal-height screw 4263 and a quick connector 428.

[0035] Upper template 422: Fixed to the upper die mounting seat 421 by screws.

[0036] Upper die sealing ring 423: Fixed to the upper template 422 by the pressing plate 424.

[0037] Pressing head 4261: 6 quick-release pressing heads 4261 are fixed to one side of the upper die mounting seat 421 through equal-height screws 4263.

[0038] Quick connector 428: Fixedly connected to one side of the helium leak detector mass spectrometer.

[0039] Fan 410: Fixed to the first mounting plate 49 by screws, used to blow away the helium gas overflowing from the upper die sealing assembly 42.

[0040] Quick-release fixing block 47: Used to quickly adjust the overall height of the fan 410 on the first mounting plate 49.

[0041] First mounting plate 49: Fixed to two first mounting rods 48 by screws, and then fixed to the side of the upper die mounting plate 45 through the quick-release fixing block 47.

[0042] Control of the downward pressing cylinder 46: The telescopic movement of the downward pressing cylinder 46 is controlled by the control center 2 to ensure the smoothness and precision of the up and down movement.

[0043] Function of the fan 410: The fan 410 is not only used to blow away the overflowing helium gas, but also can keep the detection area clean during the detection process and reduce pollution.

[0044] The upper end of the column 41 is fixed to the upper die mounting plate 45, and the other end is connected and locked to the frame large plate 1 by screws. On the upper die mounting plate 45, there are 8 downward pressing cylinders 46 and 8 first linear bearings 44 fixed above them. The 8 downward pressing cylinders 46 are grouped in pairs. The upper die sealing assembly 42 is connected and fixed to them through 2 first guide rods 43 and 2 first floating joints 411. The upper die sealing assembly 42 moves up and down through the telescopic movement of the downward pressing cylinder 46. The fan 410 is fixed to the first mounting plate 49 by screw connection. The first mounting plate 49 is fixed to two first mounting rods 48 by screw connection. The two first mounting rods 48 are fixed through a set of quick-release fixing blocks 47, and a set of quick-release fixing blocks 47 are fixed to the side of the upper die mounting plate 45 by screw connection. The upper die sealing assembly 42 includes an upper die mounting seat 421, an upper template 422, an upper die sealing ring 423, a pressing plate 424, a pressing head 4261, an equal-height screw 4263 and a quick connector 428. The upper template 422 is fixed to the upper die mounting seat 421 by screw connection. The upper die sealing ring 423 is fixed to the upper template 422 by the pressing plate 424. 6 quick-release pressing heads 4261 are fixed to one side of the upper die mounting seat 421 through the equal-height screw 4263. The quick connector 428 is fixedly connected to one side of the helium leak detector mass spectrometer. By starting the fan 410, the helium gas overflowing from the upper die sealing assembly 42 is blown away. At the same time, the overall height of the fan 410 on the first mounting plate 49 can be quickly adjusted through the quick-release fixing block 47. Further, by starting the downward pressing cylinder 46, the overall up and down movement of the upper die sealing assembly 42 can be controlled, so as to facilitate the subsequent debugging for the replacement and cleaning of the upper die sealing ring.

[0045] Such as Figure 5As shown in the figure, the lifting and centering assembly 5 includes a telescopic cylinder 51, a transition plate 52, a second floating joint 53, a telescopic cylinder 54, a first sliding rod 55, a first fixing plate 58, a side push cylinder 59, a second cylinder mounting plate 510, a second sliding rod 511, a second mounting plate 512, a third mounting plate 513, a first centering plate 514, a reference block 515, a first cylinder mounting plate 516, a third sliding rod 517 and a third linear bearing 518.

[0046] The telescopic cylinder 51 and the telescopic cylinder 54: are connected through the second floating joint 53 and are used for overall lifting.

[0047] The transition plate 52: connects the telescopic cylinder 51 and the 4 first sliding rods 55.

[0048] The first sliding rod 55: The lower ends of the 4 sliding rods are fixed on the transition plate 52, and the upper ends are fixed to the 2 first fixing plates 58.

[0049] The first fixing plate 58: fixes the third linear bearing 518.

[0050] The side push cylinder 59: The 2 side push cylinders 59 are respectively fixed on one side of the first cylinder mounting plate 516 and the second cylinder mounting plate 510.

[0051] The first centering plate 514 and the reference block 515: are fixed in groups of two on the first cylinder mounting plate 516, the second mounting plate 512 and the third mounting plate 513.

[0052] The third sliding rod 517 and the second sliding rod 511: slide on the inner and outer sides through the third linear bearing 518.

[0053] Centering process: The side push cylinder 59 pushes the first centering plate 514 on the second sliding rod 511 to move, and the third mounting plate 513 on the third sliding rod 517 remains stationary until the clamping and centering of the housing are completed.

[0054] Synchronous control: Through the control center 2, the synchronous actions of the telescopic cylinder 51 and the telescopic cylinder 54 are ensured to avoid errors caused by non-synchronization.

[0055] The lifting and centering assembly 5 is used for lifting the housing to avoid interference and centering the housing. The second telescopic cylinder 54 is fixedly connected to the bottom of the large frame plate 1 by screws. The first telescopic cylinder 51 is fixedly connected to the lower part of the transition plate 52 by screws. The lower ends of the 4 first sliding rods 55 are fixed to the transition plate 52, and the upper ends are fixed to the 2 first fixing plates 58. The first telescopic cylinder 51 and the second telescopic cylinder 54 are connected to each other through the second floating joint 53. The overall lifting of the upper part is mainly carried out by the telescopic movement of the first telescopic cylinder 51 and the second telescopic cylinder 54. The third linear bearing 518 is fixedly sleeved on the first fixing plate 58. The 2 side push cylinders 59 are respectively fixedly connected to one side of the first cylinder mounting plate 516 and the second cylinder mounting plate 510 by screws. The first centering plate 514 and the reference block 515 are fixedly connected to the first cylinder mounting plate 516, the second mounting plate 512, and the third mounting plate 513 in groups of two by screws. The 2 third sliding rods 517 and the 2 second sliding rods 511 slide on the inner and outer sides respectively through the third linear bearing 518. When the side push cylinder extends, the sliding on the inner and outer sides is a relative movement, so as to achieve the centering effect. That is, when the side push cylinder 59 is started to push the first centering plate 514 on the second sliding rod 511 to move, the third mounting plate 513 on the third sliding rod 517 remains stationary until the third mounting plate 513 and the first centering plate 514 complete the clamping of the housing, and then they are centered at the same time. By starting the lifting and centering assembly 5, the 4 blade battery housing bodies 3 can be clamped at the same time, and with the quick connectors, helium leak detection can be carried out simultaneously in four channels at a time, greatly improving the production capacity and solving the problem of low efficiency in the existing detection method that requires manual repeated detection.

[0056] As Figure 6 , Figure 7 shown, the support assembly 6 includes a support plate 61, a bearing mounting rod 62, a support bearing 63, a cylinder fixing plate 64, a first fixing rod 65, a floating nozzle assembly 66, a third floating joint 67, a first cylinder 68, a first guiding bearing 691, a bearing fixing rod 692, a first fixing ring 693, a fourth linear bearing 610, a second fixing plate 611, a stainless steel spring 612, a side push centering plate 613, and a second guiding rod 614.

[0057] Support plate 61: The 2 support plates are fixed to the large frame plate 1 by screws.

[0058] Bearing mounting rod 62: Fix 8 support bearings 63.

[0059] Support bearing 63: Used to support the lower die assembly.

[0060] First fixing rod 65: Fix 4 sets of floating nozzle assemblies 66.

[0061] First cylinder 68: Fixed to the support plate 61 through the cylinder fixing plate 64, and used to push the side push centering plate 613.

[0062] Side-pushing centering plate 613: Connected to the first cylinder 68 through the third floating joint 67, used to level the housing and ensure consistency from front to back.

[0063] Second guiding rod 614: Guided by the fourth linear bearing 610 to prevent the side-pushing centering plate 613 from being uneven left and right due to its excessive length.

[0064] Alignment bearing set: One set consists of 2 units, fixed on one side of the bearing installation rod 62.

[0065] Floating nozzle assembly 66: Includes the first fixing block 661, the first spring 662, the helium spraying nozzle 663, the first sealing ring 664, the second fixing ring 665, the elbow 666, and the oil-free bushing 667.

[0066] Helium spraying nozzle 663: Slides back and forth through the oil-free bushing 667 to supply helium.

[0067] First spring 662: Provides elastic force to offset the impact force after the lower die reaches its position, extending the service life of the equipment.

[0068] Two support plates 61 are fixedly connected to the frame main plate 1 by screws. Eight support bearings 63 are fixed to the support plates 61 through the bearing installation rod 62. Four sets of floating nozzle assemblies 66 are fixedly connected to one side of the first fixing rod 65 by screws. The first fixing rod 65 is fixed to the column 41. The first cylinder 68 is fixedly connected to the cylinder fixing plate 64 by screws. The cylinder fixing plate 64 is fixed to the support plate 61. The side-pushing centering plate 613 is connected to the first cylinder 68 through the third floating joint 67. The second guiding rod 614 is guided by the fourth linear bearing 610 to prevent the side-pushing centering plate 613 from being uneven left and right due to its excessive length. The side-pushing centering plate 613 is mainly used to level the housing and ensure consistency from front to back. The bearing fixing rod 692 is fixedly connected to one side of the bearing installation rod 62 by screws. One set of the alignment bearing set consists of 2 units. The floating nozzle assembly 66 includes the first fixing block 661, the first spring 662, the helium spraying nozzle 663, the first sealing ring 664, the second fixing ring 665, the elbow 666, and the oil-free bushing 667. The support assembly 6 is used to support the lower die assembly and align the front and back positions of the housing. The floating nozzle is used to buffer the inertial force of the rapid movement of the lower die, achieving better sealing. The floating nozzle assembly 66 mainly relies on the helium spraying nozzle 663 to slide back and forth through the oil-free bushing 667. The first spring 662 provides elastic force to offset the impact force after the lower die reaches its position. The elbow 666 is used to connect the helium gas cylinder and transport helium to the helium detection cavity of the lower die. When aligning the front and back positions of the housing, the inertial force of the rapid movement of the lower die body 7142 is buffered by the floating nozzle, thereby achieving a better sealing effect, and the elastic force provided by the first spring 622 is used to offset the impact force after the lower die reaches its position, achieving the effect of extending the service life of the equipment.

[0069] As Figure 8 and Figure 9 shown, the lower die moving assembly 7 includes a fixing frame 71, a drag chain body 72, a drag chain fixing plate 73, a drag chain mounting plate 74, a servo motor 75, a speed reducer 76, a motor mounting plate 77, a coupling 78, a driving wheel mounting seat 79, a driving wheel body 710, a fixing seat 711, a fifth linear bearing 712, a third guide rod 713, a lower die sealing assembly 714, a driven wheel fixing block 715, a driven wheel body 716, a synchronous belt 717, and a third fixing plate 718.

[0070] Fixing frame 71: Fixed to the machine frame by screws.

[0071] Drag chain body 72: Used to protect cables and air pipes.

[0072] Servo motor 75: Connects the driving wheel mounting seat 79 and the driving wheel body 710 through the speed reducer 76 and the coupling 78.

[0073] Synchronous belt 717: Provides the forward and backward movement of the lower die sealing assembly 714.

[0074] Third guide rod 713: Two guide rods ensure the horizontal movement of the lower die sealing assembly 714.

[0075] Lower die sealing assembly 714: Includes a lower die fixing plate 7141, a lower die body 7142, a lower die sealing ring 7143, a joint body 7144, a third fixing ring 7145, a sliding block 7146, a connecting plate 7147, a connecting shaft 7148, and a connecting block 7149.

[0076] Lower die body 7142: Fixed to the lower die fixing plate 7141 by screws.

[0077] Lower die sealing ring 7143: Fixed in the groove of the lower die body 7142 by extrusion.

[0078] Joint body 7144: Connects to the vacuum pump and is used to evacuate the sealed cavity.

[0079] Vacuum pump connection: When it is necessary to evacuate the air in the lower die cavity, connect the joint body 7144 to the vacuum pump, and start the vacuum pump to evacuate the air inside the sealed cavity formed by the lower die fixing plate 7141, the lower die body 7142, the lower die sealing ring 7143, and the joint body 7144.

[0080] Helium detection: After the air is completely evacuated, helium is introduced into the inside of the sealed cavity through the floating nozzle assembly 66 at the other end of the lower die body 7142 for detection.

[0081] The fixing bracket 71 is fixedly connected to the machine frame by screws. The fixing seat 711 is fixed on the fixing bracket 71. The forward and backward movement of the lower die sealing assembly 714 is mainly driven by the synchronous belt 717, and the horizontal guarantee of its movement is ensured by two third guiding rods 713. The lower die sealing assembly 714 includes a lower die fixing plate 7141, a lower die body 7142, a lower die sealing ring 7143, a joint body 7144, a third fixing ring 7145, a sliding block 7146, a connecting plate 7147, a connecting shaft 7148 and a connecting block 7149. The lower die moving assembly 7 is used to move the lower die. The lower die sealing assembly 714 is mainly composed of 4 sets of lower dies. The lower die body 7142 is fixedly connected to the lower die fixing plate 7141 by screws. The lower die sealing ring 7143 is fixed in the groove of the lower die body 7142 by extrusion. The joint body 7144 is mainly connected to the vacuum pump. When it is necessary to extract the air in the lower die cavity, connect 7144 to the vacuum pump, start the vacuum pump to extract the air inside the sealed cavity formed by the lower die fixing plate 7141, the lower die body 7142, the lower die sealing ring 7143 and the joint body 7144. After the air is completely extracted, helium is introduced into the inside of the sealed cavity through the floating air nozzle assembly 66 at the other end of the lower die body 7142 for detection.

[0082] The working principle of the above embodiment is as follows: First, start the fan 410 to disperse the helium gas overflowing from the upper die sealing assembly 42. At the same time, the overall height of the fan 410 on the first mounting plate 49 can be quickly adjusted through the quick-release fixing block 47. Further, by starting the downward pressure cylinder 46, the overall up and down movement of the upper die sealing assembly 42 can be controlled, so as to facilitate the replacement and cleaning of the upper die sealing ring during subsequent debugging.

[0083] The first telescopic cylinder 51 and the second telescopic cylinder 54 expand and contract, and are connected through the second floating joint 53 to realize the overall lifting. The side push cylinder 59 pushes the 4 groups of first centering plates 514 on the second sliding rod 511 to move, and the third mounting plate 513 on the third sliding rod 517 remains stationary until the clamping and centering of the shell are completed. Through the control center 2, the synchronous actions of the first telescopic cylinder 51 and the second telescopic cylinder 54 are ensured to avoid errors caused by non-synchronization. When the side push cylinder extends, the sliding on the inner and outer sides is a relative movement, so as to achieve the centering effect. That is, when starting the side push cylinder 59 to push the first centering plate 514 on the second sliding rod 511 to move, the third mounting plate 513 on the third sliding rod 517 remains stationary until the third mounting plate 513 and the first centering plate 514 complete the clamping of the shell and then center at the same time.

[0084] Next, when aligning the front and rear positions of the middle housing, the first cylinder 68 pushes the side-pushing alignment plate 613, which is connected through the third floating joint 67 to flatten the housing and ensure consistency between the front and the rear. The second guiding rod 614 is guided by the fourth linear bearing 610 to prevent the side-pushing alignment plate 613 from being non-parallel left and right due to its excessive length. The floating nozzle assembly 66 provides helium gas through the helium injection nozzle 663 and the first spring 662 and buffers the inertia of the rapid movement of the lower die body 7142 to achieve a better sealing effect, and provides elastic force through the first spring 622 to offset the impact force after the lower die reaches its position, achieving the effect of extending the service life of the equipment.

[0085] Finally, the servo motor 75 drives the driving wheel body 710 through the speed reducer 76 and the coupling 78, driving the synchronous belt 717 to achieve the forward and backward movement of the lower die sealing assembly 714. The third guiding rod 713 ensures the horizontal movement of the lower die sealing assembly 714. When it is necessary to extract the air in the lower die cavity, connect the joint body 7144 to the vacuum pump, start the vacuum pump to extract the air inside the sealed cavity formed by the lower die fixing plate 7141, the lower die body 7142, the lower die sealing ring 7143, and the joint body 7144. After the air is completely extracted, helium gas is introduced into the inside of the sealed cavity through the floating nozzle assembly 66 at the other end of the lower die body 7142 for detection.

[0086] During implementation, the speed-position curve of the servo motor 75 should be set reasonably according to actual needs, and a reasonable acceleration and deceleration curve should be set to avoid the vibration caused by rapid start and stop from affecting the detection results. During implementation, in order to ensure the reasonable setting of the speed-position curve of the servo motor 75 and avoid the vibration caused by rapid start and stop from affecting the detection results, the following specific steps can be taken:

[0087] Customization of the speed-position curve:

[0088] Design the speed-position curve according to the specific dimensions, weight of the blade battery housing, and the required detection accuracy.

[0089] Use the function blocks in the motion control software or PLC (programmable logic controller) to create a smooth speed-position curve. These function blocks provide S-shaped curve acceleration / deceleration options, and this kind of curve can reduce the impact during start and stop.

[0090] Optimization of acceleration and deceleration parameters:

[0091] Determine the appropriate maximum acceleration and deceleration values.

[0092] Determine the optimal acceleration slope through experiments, that is, the transition time from rest to maximum speed and from maximum speed to rest. This can be completed by repeatedly testing and recording the response of the lower die sealing assembly 714 at different accelerations.

[0093] Buffer Setting:

[0094] When approaching the target position, set a buffer area where the speed is gradually reduced to ensure a smooth arrival at the final position.

[0095] The length of the buffer can be adjusted according to the actual situation, generally 10% to 20% of the total travel.

[0096] Real-time Feedback and Adjustment:

[0097] Use an encoder or other displacement sensors to monitor the actual position and speed of the servo motor 75 and feed the data back to the control system.

[0098] The control system adjusts the output command in real time according to the feedback information to keep the motion trajectory consistent with the preset speed-position curve.

[0099] Debugging and Verification:

[0100] After completing the preliminary settings, conduct multiple no-load running tests to observe the stability of the lower die sealing component 714 driven by the servo motor 75.

[0101] Gradually load the actual workpiece, simulate the real working conditions, check for obvious vibration phenomena, and further fine-tune the parameters accordingly until satisfactory results are achieved.

[0102] Regularly maintain the servo motor 75 and related transmission mechanisms, including lubrication, cleaning, and checking for wear.

[0103] Re-calibrate the speed-position curve after each major overhaul of the equipment or replacement of important components to ensure long-term stable operation.

[0104] Through the above methods, the working performance of the servo motor 75 can be effectively improved, unnecessary vibrations can be reduced, thereby improving the overall detection accuracy and production efficiency of the four-channel multi-compatible blade battery case helium leak detection device.

[0105] Therefore, this application also discloses a method for controlling the speed-position curve of the servo motor 75, specific steps:

[0106] Design the speed-position curve according to the specific dimensions, weight, and required detection accuracy of the blade battery case;

[0107] First, use the motion control software or the function blocks in the programmable logic controller to create a smooth speed-position curve; these function blocks provide S-shaped curve acceleration / deceleration options;

[0108] Determine the maximum acceleration and deceleration values;

[0109] Determine the optimal acceleration slope, i.e., the transition time from rest to maximum speed and from maximum speed to rest;

[0110] When approaching the target position, set a buffer zone where the speed is gradually reduced to ensure a smooth arrival at the final position;

[0111] Use an encoder or displacement sensor to monitor the actual position and speed of the servo motor 75 and feedback the data to the control system;

[0112] The control system adjusts the output command in real time according to the feedback information to keep the motion trajectory consistent with the preset speed - position curve;

[0113] After the preliminary setting is completed, conduct multiple no - load running tests to observe the stability of the lower die sealing assembly 714 driven by the servo motor 75;

[0114] Simulate the real working conditions, check for obvious vibration phenomena, and further fine - tune the parameters accordingly until a satisfactory effect is achieved.

[0115] The relationship between evacuation time and detection efficiency in implementation: In implementation, it is necessary to determine the balance point between the optimal evacuation time and the helium filling amount. It should not be too fast to cause insufficient gas mixing, nor too slow to reduce production efficiency.

[0116] To ensure that the four - channel multi - compatible blade battery case helium leak detection device achieves optimal performance in actual operation, especially in the balance between evacuation time and helium filling amount, the following specific steps can be taken:

[0117] Initial evacuation stage: First, perform rapid evacuation to quickly reduce the pressure inside the cavity.

[0118] Fine evacuation stage: Subsequently, enter a slower but more precise evacuation stage, aiming to further reduce the residual gas inside the cavity and allow the remaining gas molecules to have sufficient collisions and adsorption with the wall surface.

[0119] Final stable stage: Finally, maintain for a period of time (e.g., 2 - 4 seconds) to allow the system to reach a stable state, ensuring that the internal pressure is low enough for helium detection.

[0120] Control of helium filling amount:

[0121] Filling rate: Inject helium into the sealed cavity in a gradually increasing manner to avoid pressure fluctuations caused by sudden large - volume charging. Use a controllable flow valve to adjust the helium flow rate.

[0122] Filling volume: Determine the appropriate helium filling volume based on the specific size and shape of the battery housing. Ensure the cavity is fully filled with helium while leaving enough space for even distribution. The filling process can be monitored using a preset pressure value, stopping when the preset pressure is reached.

[0123] Mixing time: After the helium is injected, a certain amount of time (e.g. 3-5 seconds) should be given to allow the helium to be fully mixed, so as to ensure a consistent helium concentration in the entire test area.

[0124] Closed-loop control system: A closed-loop feedback mechanism is introduced to monitor pressure changes in real time through a pressure sensor installed inside the cavity, automatically adjusting the working mode of the vacuum pump and the helium supply speed to achieve dynamic regulation of the evacuation time and helium filling volume.

[0125] During each test, key parameters such as pump-down time, helium filling volume, and final test results are recorded. These data are used to continuously optimize the algorithm and improve the accuracy and efficiency of the overall system.

[0126] Set a safety threshold and immediately stop operation and issue an alarm if abnormal high pressure is detected.

[0127] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein.

Claims

1. Four-channel multi-compatible helium leak detection device for blade battery housing, including a frame large board (1), characterized in that: At the bottom of the frame large plate (1), a control center (2) is provided. At the top of the frame large plate (1), a support assembly (6) is provided. At the top of the frame large plate (1), a jacking and centering assembly (5) is provided. At the top of the support assembly (6), an upper die pressing assembly (4) is provided. On one side of the upper die pressing assembly (4), a lower die moving assembly (7) is provided. At the bottom of the upper die pressing assembly (4), a blade battery housing body (3) is provided; The upper die pressing assembly (4) includes columns (41), an upper die sealing assembly (42), first guide rods (43), first linear bearings (44), an upper die mounting plate (45), a downward pressing cylinder (46), quick-release fixing blocks (47), first mounting rods (48), a first mounting plate (49), a fan (410), and a first floating joint (411). The upper ends of the columns (41) are fixed to the upper die mounting plate (45), and the other ends are connected and locked to the frame large plate (1) by screws. On the upper die mounting plate (45), there are 8 downward pressing cylinders (46) and 8 first linear bearings (44) fixed above it. The 8 downward pressing cylinders (46) are grouped in sets of 2. The upper die sealing assembly (42) is fixed by connecting it through 2 first guide rods (43) and 2 first floating joints (411). The upper die sealing assembly (42) moves up and down through the telescoping of the downward pressing cylinder (46). The fan (410) is fixed to the first mounting plate (49) by screws. The first mounting plate (49) is fixed to 2 first mounting rods (48) by screws. The 2 first mounting rods (48) are fixed by a set of quick-release fixing blocks (47), and a set of quick-release fixing blocks (47) is fixed to the side of the upper die mounting plate (45) by screws.

2. The helium leak detection device for the four-channel multi-compatible blade battery housing according to claim 1, wherein, The upper die sealing assembly (42) includes an upper die mounting seat (421), an upper die plate (422), an upper die sealing ring (423), a pressing plate (424), a pressing head (4261), equal-height screws (4263), and a quick connector (428). The upper die plate (422) is fixed to the upper die mounting seat (421) by screws. The upper die sealing ring (423) is fixed to the upper die plate (422) by the pressing plate (424). The 6 quick-release pressing heads (4261) are fixed to one side of the upper die mounting seat (421) by equal-height screws (4263). The quick connector (428) is fixedly connected to one side of the helium leak detection mass spectrometer.

3. The helium leak detection device for the four-channel multi-compatible blade battery housing according to claim 1, wherein: The jacking and centering assembly (5) includes a telescopic cylinder one (51), a transition plate (52), a second floating joint (53), a telescopic cylinder two (54), a first sliding rod (55), a first fixing plate (58), a side push cylinder (59), a cylinder mounting plate two (510), a second sliding rod (511), a second mounting plate (512), a third mounting plate (513), a first centering plate (514), a reference block (515), a cylinder mounting plate one (516), a third sliding rod (517) and a third linear bearing (518). The jacking and centering assembly (5) is used for jacking the housing to avoid interference and centering the housing. The telescopic cylinder two (54) is fixedly connected to the bottom of the frame large plate (1) by screws. The telescopic cylinder one (51) is fixedly connected to the lower part of the transition plate (52) by screws. The lower ends of the 4 first sliding rods (55) are fixed on the transition plate (52), and the upper ends are fixed to the 2 first fixing plates (58). The telescopic cylinder one (51) and the telescopic cylinder two (54) are connected to each other through the second floating joint (53). The overall lifting of the upper part is mainly carried out by the telescopic movement of the telescopic cylinder one (51) and the telescopic cylinder two (54). The third linear bearing (518) is fixedly sleeved on the first fixing plate (58). The 2 side push cylinders (59) are respectively fixedly connected to one side of the cylinder mounting plate one (516) and the cylinder mounting plate two (510) by screws. The first centering plate (514) and the reference block (515) are fixed to the cylinder mounting plate one (516), the second mounting plate (512) and the third mounting plate (513) in groups of two by screws. The 2 third sliding rods (517) and the 2 second sliding rods (511) slide on the inner and outer sides respectively through the third linear bearing (518).

4. The helium leak detection device for the four-channel multi-compatible blade battery housing according to claim 1, wherein: The support assembly (6) includes a support plate (61), a bearing mounting rod (62), a support bearing (63), a cylinder fixing plate (64), a first fixing rod (65), a floating nozzle assembly (66), a third floating joint (67), a first cylinder (68), a first guiding bearing (691), a bearing fixing rod (692), a first fixing ring (693), a fourth linear bearing (610), a second fixing plate (611), a stainless steel spring (612), a side pushing and centering plate (613), and a second guiding rod (614). The two support plates (61) are fixedly connected to the large frame plate (1) by screws. The eight support bearings (63) are fixed to the support plate (61) by the bearing mounting rod (62). The four sets of floating nozzle assemblies (66) are fixedly connected to one side of the first fixing rod (65) by screws. The first fixing rod (65) is fixed to the column (41). The first cylinder (68) is fixedly connected to the cylinder fixing plate (64) by screws. The cylinder fixing plate (64) is fixed to the support plate (61). The side pushing and centering plate (613) is connected to the first cylinder (68) through the third floating joint (67). The second guiding rod (614) is guided by the fourth linear bearing (610) to prevent the side pushing and centering plate (613) from being uneven left and right due to its excessive length. The side pushing and centering plate (613) is mainly used to flatten the shell to ensure consistency front and back. The bearing fixing rod (692) is fixedly connected to one side of the bearing mounting rod (62) by screws, and two sets of guiding bearings are in a group.

5. The helium leak detection device for the four-channel multi-compatible blade battery housing according to claim 4, wherein: The floating nozzle assembly (66) includes a first fixing block (661), a first spring (662), a helium spraying nozzle (663), a first sealing ring (664), a second fixing ring (665), an elbow (666), and an oil-free bushing (667). The support assembly (6) is used to support the lower die assembly, center the front and back positions of the shell, and the floating nozzle is used to buffer the inertial force of the rapid movement of the lower die to achieve better sealing. The floating nozzle assembly (66) mainly relies on the helium spraying nozzle (663) to slide back and forth through the oil-free bushing (667). The first spring (662) provides elastic force to offset the impact force after the lower die reaches its position. The elbow (666) is used to connect to the helium gas cylinder to deliver helium gas to the helium detection cavity of the lower die.

6. The helium leak detection device for the four-channel multi-compatible blade battery housing according to claim 1, wherein: The lower die moving component (7) includes a fixing frame (71), a drag chain body (72), a drag chain fixing plate (73), a drag chain mounting plate (74), a servo motor (75), a speed reducer (76), a motor mounting plate (77), a coupling (78), a driving wheel mounting seat (79), a driving wheel body (710), a fixing seat (711), a fifth linear bearing (712), a third guide rod (713), a lower die sealing component (714), a driven wheel fixing block (715), a driven wheel body (716), a synchronous belt (717), and a third fixing plate (718). The fixing frame (71) is fixedly connected to the machine frame by screws. The fixing seat (711) is fixed on the fixing frame (71). The forward and backward movement of the lower die sealing component (714) is mainly driven by the synchronous belt (717), and the horizontal movement is ensured by two third guide rods (713).

7. The helium leak detection device for the four-channel multi-compatible blade battery housing according to claim 6, characterized in that: The lower die sealing component (714) includes a lower die fixing plate (7141), a lower die body (7142), a lower die sealing ring (7143), a joint body (7144), a third fixing ring (7145), a sliding block (7146), a connecting plate (7147), a connecting shaft (7148), and a connecting block (7149). The lower die moving component (7) is used to move the lower die. The lower die sealing component (714) is mainly composed of four sets of lower die bodies (7142). The lower die body (7142) is fixedly connected to the lower die fixing plate (7141) by screws. The lower die sealing ring (7143) is fixed in the groove of the lower die body (7142) by extrusion. The joint body (7144) is mainly connected to a vacuum pump to extract air and helium from the lower die cavity. The other end of the lower die contacts the floating air nozzle component (66) to introduce helium gas.

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