CN217765358U - Pressing device for testing air tightness of battery pack - Google Patents

Abstract

The present application relates to a pressing device for air tightness testing of battery packs. The pressing device includes a conveying module, a driving module and a pressing module. The conveying module is used for carrying the battery pack to be tested to a preset position or away from the preset position, and the driving module can drive the pressing module to move toward or away from the upper cover of the battery pack. The pressing device for the air tightness test of the battery pack provided by the present application solves the problems of difficult operation and low work efficiency of the existing pressing tool.

Description

Compression device for battery pack air tightness test

technical field

The present application relates to the technical field of battery pack testing tooling, in particular to a pressing device for battery pack airtightness testing.

Background technique

With the continuous development of society, people use cars more and more frequently. Compared with traditional vehicles, which emit more pollution, new energy vehicles have almost no pollution. Therefore, new energy vehicles are becoming more and more popular. Furthermore, the battery pack is the main source of power for new energy vehicles. However, the battery pack may not be tightly sealed during use. Therefore, the battery pack needs to be tested for air tightness during the production process.

However, as the requirements for the lightweight design of new energy vehicles are getting higher and higher, as the main component that accounts for more than 30% of the vehicle's weight: the battery pack uses a lot of lightweight materials, especially the battery pack cover, Most battery pack covers are constructed of lightweight materials. Moreover, the structure of general light materials is poor in rigidity and is prone to deformation. Especially when the battery pack is tested for air tightness, high-pressure gas is filled into the box to cause pressure on the upper cover, resulting in deformation and swelling of the upper cover, and the cavity in the box The larger the volume, the longer the inflation time.

In order to solve the problem that the upper cover of the battery pack is prone to deformation, the current mainstream method is to use manual compression tooling to compress the upper cover of the battery pack to prevent the upper cover of the battery pack from bulging. However, the above-mentioned manual pressing tool is heavy, and the staff needs to carry the manual pressing tool to press on the battery pack, so that it is easy to cause damage to the battery pack. Further, the above-mentioned operation method is difficult to operate, and will cause Reduces the efficiency of the battery pack compaction operation.

Utility model content

Based on this, it is necessary to provide a pressing device for testing the airtightness of the battery pack, which solves the problems of difficult operation and low work efficiency of the existing pressing tool.

The compression device provided in the present application for testing the airtightness of a battery pack includes a conveying module, a driving module and a compression module. The conveying module is used to carry the battery pack to be tested to the preset position or to carry the battery pack to be tested away from the preset position, and the driving module can drive the pressing module to move toward or away from the battery pack upper cover.

In one embodiment, the transport module is a mobile transport vehicle. It can be understood that such arrangement is beneficial to reduce the manufacturing cost of the pressing device.

In one of the embodiments, the transport module is an AGV trolley. It can be understood that such setting is beneficial to greatly improve the work efficiency of the pressing operation of the battery pack.

In one of the embodiments, the compression module includes a connecting plate and a plurality of movable pressing blocks, and the plurality of movable pressing blocks can be movably arranged on one side of the connecting plate, and the driving module can drive the connecting plate to drive the movable pressing blocks towards or Move away from the upper cover of the battery pack, so that the movable pressing block is pressed tightly or away from the upper cover of the battery pack. It can be understood that such an arrangement is beneficial to more conveniently check the airtightness of the joints of the fasteners on the upper cover of the battery pack.

In one embodiment, a plurality of movable pressing blocks are magnetically connected to one side of the connecting plate. It can be understood that such an arrangement facilitates the movement of the movable pressing block to different positions of the connecting plate.

In one of the embodiments, the movable pressing block is made of polyurethane. It can be understood that such setting is beneficial to prevent the movable pressing block from damaging the upper cover of the battery pack.

In one embodiment, the driving module includes a driving cylinder, and two driving cylinders are respectively arranged at two ends of the compression module for pushing the compression module to move as a whole. It can be understood that such setting is beneficial to improve the driving force of the driving module.

In one of the embodiments, the pressing device further includes a supporting module, one end of the supporting module is arranged on the horizontal plane, and the driving module and the pressing module are installed on the end of the supporting module away from the horizontal plane, and the pressing module is installed on the end of the driving module close to the horizontal plane , and the pressing module is movably connected to the supporting module. It can be understood that such arrangement is beneficial to improve the structural stability of the pressing device.

In one embodiment, the supporting module includes a horizontal bracket and vertical brackets fixedly connected to both ends of the horizontal bracket, the driving module is installed on the horizontal bracket, and the pressing module is movably installed on the vertical bracket along the vertical direction.

In one embodiment, the horizontal support includes a first support distributed along the vertical direction, a second support and a multi-section connecting rod connecting the first support and the second support. It can be understood that such arrangement is beneficial to reduce the total weight of the horizontal support.

Compared with the prior art, the application provides a compression device for the airtightness test of the battery pack. When the battery pack starts the airtightness test, the driving module drives the compression module to move towards the direction close to the upper cover of the battery pack. , so that the compression module is pressed against the surface of the upper cover of the battery pack, thereby preventing the battery pack from bulging during the airtightness test. When the airtightness test of the battery pack is finished, the driving module drives the compression module to move away from the upper cover of the battery pack, so that the delivery module can carry the battery pack away from the preset position. In this way, the compression module can be used to compress and separate the upper cover of the battery pack through the drive module, which replaces the operation method of pressing the upper cover of the battery pack by the manual clamping tool, effectively reducing the pressure on the upper cover of the battery pack. The operation difficulty of the pressing operation is improved, and the efficiency of the pressing operation of the battery pack will be improved. Further, the battery pack to be tested is carried to or away from the preset position through the delivery module, without the need for staff to carry the battery pack, thereby further improving the working efficiency of the battery pack pressing operation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the traditional technology. Obviously, the accompanying drawings in the following description are only the present invention For some embodiments of the application, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of a pressing device according to an embodiment provided by the present application;

Fig. 2 is a schematic structural diagram of a movable briquetting block according to an embodiment provided by the present application;

FIG. 3 is a schematic structural diagram of a connection plate according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a connection board according to another embodiment of the present application.

Reference signs: 100, battery pack; 200, conveying module; 300, driving module; 400, pressing module; 410, connecting plate; 411, moving chute; 412, branch chute; 420, movable pressing block; 421, Clamping part; 422, pressing part; 423, pressing surface; 500, support module; 510, horizontal support; 511, first support; 512, second support; 513, connecting rod; 520, vertical support; 530 , reinforcement rib; 600, sensing module; 700, release button.

Detailed ways

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

With the continuous development of society, people use cars more and more frequently. Compared with traditional vehicles, which emit more pollution, new energy vehicles have almost no pollution. Therefore, new energy vehicles are becoming more and more popular. Furthermore, the battery pack 100 is the main source of power for new energy vehicles. However, the battery pack 100 may not be tightly sealed during use. Therefore, the battery pack 100 needs to be tested for air tightness during the production process.

However, as the requirements for lightweight design of new energy vehicles are getting higher and higher, as the main component that accounts for more than 30% of the weight of the vehicle: the battery pack 100 uses a lot of lightweight materials, especially the battery pack 100 Cover, most battery pack 100 covers are constructed of lightweight materials. Moreover, general light materials have poor structural rigidity and are prone to deformation. Especially when the battery pack 100 is tested for air tightness, high-pressure gas is charged into the box to cause pressure on the upper cover, causing the upper cover to deform and bulge, leaving the box empty. The volume of the cavity becomes larger and the inflation time becomes longer.

Usually, in order to solve the problem that the upper cover of the battery pack 100 is easily deformed, the current mainstream method is to use a manual pressing tool to compress the upper cover of the battery pack 100 to prevent the upper cover of the battery pack 100 from bulging. However, the above-mentioned manual pressing tool is heavy, and the staff needs to carry the manual pressing tool to press on the battery pack 100, so that it is easy to cause damage to the battery pack 100. Further, the above-mentioned operation method is difficult to operate. And it will reduce the efficiency of the pressing operation of the battery pack 100 .

Please refer to Fig. 1, in order to solve the problem of difficult operation and low work efficiency of the existing pressing tooling, the present application provides a pressing device for testing the airtightness of the battery pack 100, the pressing device includes a delivery module 200, a driving module 300 and a pressing module 400. The delivery module 200 is used to carry the battery pack 100 to be tested to a preset position or to carry the battery pack 100 to be tested away from a preset position, and the driving module 300 can drive the compression module 400 toward or away from the upper cover of the battery pack 100 direction to move.

When the battery pack 100 starts the airtight test, the driving module 300 drives the compression module 400 to move towards the direction close to the upper cover of the battery pack 100, so that the compression module 400 is pressed against the surface of the upper cover of the battery pack 100, thereby preventing the battery from The bag 100 bulges during the airtightness test. When the airtightness test of the battery pack 100 is completed, the driving module 300 drives the pressing module 400 to move away from the upper cover of the battery pack 100 , so that the delivery module 200 can carry the battery pack 100 away from the preset position. In this way, the pressing module 400 can realize the pressing and separating operation of the upper cover of the battery pack 100 through the driving module 300, replacing the operation mode of pressing the upper cover of the battery pack 100 by the manual pressing tool, effectively reducing the impact on the battery pack. The pressing operation of the upper cover 100 is difficult, and the efficiency of the pressing operation of the battery pack 100 will be improved. Further, the battery pack 100 to be tested is transported to or away from the preset position through the delivery module 200 , without the need for staff to carry the battery pack 100 , thereby further improving the working efficiency of the pressing operation of the battery pack 100 .

Further, in an embodiment, as shown in FIG. 1 , the delivery module 200 may be a mobile transport vehicle. Furthermore, the mobile transport vehicle can be an AGV trolley. It should be noted that the full name of AGV is: Automated Guided Vehicle, which is usually also called AGV trolley. Specifically, the AGV trolley refers to a transport vehicle equipped with an electromagnetic automatic navigation device or an optical automatic navigation device, capable of driving along a prescribed navigation path, with safety protection and various mobile loading functions. The AGV trolley moves flexibly and does not require staff to drive. Therefore, the AGV trolley greatly improves the work efficiency of the pressing operation of the battery pack 100 . But not limited thereto, the mobile transport vehicle may also be other vehicles that can be used to transport the battery pack 100 , which will not be listed here.

In other embodiments, the conveying module 200 can also be a conveyor belt conveying structure. Specifically, the conveying belt conveying structure drives the conveyer belt to convey one or more battery packs 100 through a conveying motor, so as to realize the assembly line operation of the airtightness test of the battery pack 100 . Moreover, using the conveyor belt conveying structure to transport the battery pack 100 can ensure that the battery pack 100 is more stable during the moving process, and prevent the battery pack 100 from being damaged due to bumps or vibrations.

Usually, the upper cover of the battery pack 100 is connected to other parts of the battery pack 100 by fasteners, and the parts where the fasteners are pierced on the upper cover of the battery pack 100 are prone to leakage problems. Therefore, in order to facilitate inspection of the upper cover of the battery pack 100 Airtightness of fastener joints. In one embodiment, as shown in FIG. 1, the compression module 400 includes a connecting plate 410 and a plurality of movable pressing blocks 420, and the plurality of movable pressing blocks 420 can be movably arranged on one side of the connecting plate 410, and the driving module 300 The connecting plate 410 can be driven to drive the movable pressing block 420 to move toward or away from the upper cover of the battery pack 100 , so that the movable pressing block 420 can be pressed against or away from the upper cover of the battery pack 100 . In this way, when a fastener is provided at a certain position on the upper cover of the battery pack 100, the movable pressing block 420 can be moved to a position where it will not interfere with the fastener on the upper cover of the battery pack 100, and the movable pressing block 420 When in a position where no interference will occur, the projection of the movable pressing block 420 on the upper cover of the battery pack 100 along the moving direction of the driving module 300 and the fasteners will not overlap, so that the driving module 300 drives the connecting plate 410 to drive When the movable pressing block 420 is pressed against the surface of the upper cover of the battery pack 100 , the movable pressing block 420 will not interfere with the fasteners. At this time, it is beneficial to check whether the connection of the fasteners on the upper cover of the battery pack 100 leaks.

Further, in order to improve the firmness of the connection between the movable pressing block 420 and the connecting plate 410 without affecting the movement flexibility of the connecting block, in one embodiment, as shown in FIGS. 1-4 , the connecting plate 410 is provided with multiple The movable chute 411 communicates with each other. The movable pressing block 420 includes a pressing part 422 and a clamping part 421 connected to one end of the pressing part 422. The movable pressing block 420 is movably clamped to the moving chute 411 through the clamping part 421 , and the movable pressing block 420 can move along the extending direction of the moving chute 411 . A pressing surface 423 is provided on the end surface of the pressing portion 422 away from the clamping portion 421 , and the movable pressing block 420 can be pressed against the surface of the upper cover of the battery pack 100 through the pressing surface 423 . In this way, the movable pressing block 420 can be moved on the connecting plate 410 along the preset moving chute 411, which greatly improves the moving flexibility of the movable pressing block 420, and the movable pressing block 420 is movably clamped by the clamping part 421 Because of the connecting plate 410, the firmness of the connection between the movable pressing block 420 and the connecting plate 410 is greatly improved, thereby improving the structural strength of the pressing device.

Furthermore, in one embodiment, as shown in FIG. 3 , the connecting plate 410 is in a square shape, and the moving chute 411 includes four branch chute 412 in the shape of a quarter arc, and the four branch chute 412 are connected end to end , and the centers of the four branch chutes 412 are respectively located at the four vertices of the connecting plate 410 . In other embodiments, the moving chute 411 includes m horizontal branch chute 412 and n longitudinal branch chute 412, the horizontal branch chute 412 and the longitudinal branch chute 412 are alternately connected, and both m and n is a natural number greater than or equal to 1. Specifically, as shown in FIG. 4 , the moving chute 411 includes three transverse branch chutes 412 and three longitudinal branch chute 412 . But not limited thereto, the moving chute 411 can also have other shapes, which are not listed here.

In other embodiments, in order to facilitate the movable pressing block 420 to move to different positions of the connecting plate 410, the connecting plate 410 and the movable pressing block 420 can also be magnetically connected, and a plurality of movable pressing blocks 420 are magnetically connected to one of the connecting plate 410. side. In this way, the movable pressing block 420 can be moved to any position on the connecting plate 410 , which greatly improves the adjustment flexibility of the pressing module 400 .

In order to prevent the movable pressing block 420 from damaging the upper cover of the battery pack 100, in one embodiment, the material of the movable pressing block 420 is polyurethane, which has certain elasticity and strong wear resistance. The movable pressing block 420 made of polyurethane has a certain degree of elasticity, which can effectively prevent the movable pressing block 420 from damaging the upper cover of the battery pack 100, and effectively improve the service life of the pressing device.

In order to improve the driving force of the driving module 300, in one embodiment, as shown in FIG. 400 overall displacement. In other embodiments, the driving module 300 may also be a driving motor, so that the driving accuracy of the driving module 300 is greatly improved.

Further, in order to improve the structural stability of the pressing device, in one embodiment, as shown in Figure 1, the pressing device further includes a support module 500, one end of the support module 500 is arranged on a horizontal plane, and the support module 500 is far away from the horizontal plane. A drive module 300 and a compression module 400 are installed at one end, the compression module 400 is installed at the end of the drive module 300 close to the horizontal plane, and the compression module 400 is movably connected to the support module 500 . Specifically, in one embodiment, as shown in FIG. 1 , the supporting module 500 includes a horizontal bracket 510 and vertical brackets 520 fixedly connected to both ends of the horizontal bracket 510, the driving module 300 is installed on the horizontal bracket 510, and the pressing module 400 is It is movably installed on the vertical support 520 along the vertical direction. Further, in order to reduce the total weight of the horizontal support 510, in one embodiment, as shown in FIG. and the multi-section connecting rod 513 of the second bracket 512. Furthermore, in order to improve the structural strength of the horizontal bracket 510, in one embodiment, as shown in Figure 1, a reinforcing rib 530 is provided between the connecting rod 513 and the first bracket 511, and the connecting rod 513 and the second bracket 512 Reinforcing ribs 530 are provided between them.

Please refer to Fig. 1, in order to improve the operating efficiency of the pressing operation on the upper cover of the battery pack 100, the present application also provides a pressing method for the airtightness test of the battery pack 100, the pressing method includes the following steps: using The delivery module 200 transports the battery pack 100 to be tested, and the sensing module 600 is used to sense whether the delivery module 200 loaded with the battery pack 100 to be tested has arrived at a preset position. When the sensing module 600 senses that the delivery module 200 has reached the preset position, the sensing module 600 sends a compression command to the control module (not shown in the figure), and the control module controls the drive module 300 to drive the compression module 400 towards the battery after receiving the compression command. The direction of the upper cover of the battery pack 100 is moved, and the pressing module 400 is pressed against the upper cover of the battery pack 100 . After the airtightness test of the battery pack 100 is completed, the control module controls the driving module 300 to drive the pressing module 400 to move away from the upper cover of the battery pack 100 and make the pressing module 400 loosen the upper cover of the battery pack 100 . Afterwards, the delivery module 200 carries the tested battery pack 100 away from the preset position.

The sensing module 600 is used to judge whether the conveying module 200 has reached the preset position, and when the conveying module 200 reaches the preset position, the sensing module 600 sends a compacting instruction to the control module, and then controls the driving module 300 to drive the compacting module through the control module 400 actions. In this way, the degree of automation of the pressing operation of the battery pack 100 is greatly improved, and it is beneficial to accurately locate the position of the delivery module 200 so that the delivery module 200 can accurately move the battery pack 100 to a preset position. Further, the operation method of pressing the upper cover of the battery pack 100 by using the automatic pressing operation mode instead of the manual pressing tooling effectively reduces the operational difficulty of pressing the upper cover of the battery pack 100, and improves the efficiency of the operation. The efficiency of the pressing operation of the battery pack 100. Furthermore, the battery pack 100 to be tested is carried to or from the preset position by the transport module 200 , without the need for staff to carry the battery pack 100 , thereby further improving the working efficiency of the pressing operation of the battery pack 100 .

In an embodiment, the control module may be a PLC control cabinet. It should be noted that the PLC control cabinet refers to a programmable control cabinet, and the PLC control cabinet can complete the automatic control of the equipment processing process. The PLC control cabinet has the advantages of stable performance, expandability and strong anti-interference. But not limited thereto, in other embodiments, the control module can also be a micro-control processor, an industrial computer or other control elements, which are not listed here.

In an embodiment, the sensing module 600 may be a position sensor, and the position sensor is a sensor capable of sensing the position of the measured object (transporting module 200 ) and converting it into a usable output signal. Specifically, the sensing module 600 may be a photoelectric sensor, a Hall sensor, an infrared positioning sensor or an ultrasonic positioning sensor, which are not listed here.

Further, after the airtightness test of the battery pack 100 is completed, the delivery module 200 can timely load the battery pack 100 away from the preset position. In one embodiment, as shown in FIG. 1 , the pressing method provided by the present application further includes the following steps: after the airtightness test of the battery pack 100 is completed, use the release button 700 to send a release command to the control module, and the control module receives After the release command, the driving module 300 is controlled to move away from the upper cover of the battery pack 100 , and then the delivery module 200 carries the battery pack 100 away from the preset position.

Further, the moving chute 411 is provided with a transmission rail (not shown in the figure), the transmission rail is electrically connected to the control module, and the control module can control the transmission rail to move the movable pressing block 420 along the extending direction of the moving chute 411 . In this way, the control module can control multiple movable pressing blocks 420 to rearrange in the moving chute 411 , effectively avoiding the situation that the pressing device is easy to press the fasteners when pressing the upper covers of different battery packs 100 .

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of this application should be based on the appended claims.

Claims (10)

1. A compacting device for battery pack (100) airtightness test, characterized in that it comprises a conveying module (200), a driving module (300) and a compacting module (400), the conveying module (200 ) is used to carry the battery pack (100) to be tested to a preset position or to carry the battery pack (100) to be tested away from the preset position, and the driving module (300) can drive the pressing module ( 400) moving towards or away from the upper cover of the battery pack (100). 2. The pressing device according to claim 1, characterized in that, the delivery module (200) is a mobile transport vehicle. 3. The pressing device according to claim 1, characterized in that, the delivery module (200) is an AGV trolley. 4. The pressing device according to claim 1, characterized in that, the pressing module (400) comprises a connecting plate (410) and a plurality of movable pressing blocks (420), and a plurality of the moving pressing blocks (420) ) is movably arranged on one side of the connection plate (410), and the drive module (300) can drive the connection plate (410) to drive the movable pressing block (420) towards or away from the battery pack ( 100) to move in the direction of the upper cover, so that the movable pressing block (420) presses or moves away from the upper cover of the battery pack (100). 5. The pressing device according to claim 4, characterized in that, a plurality of the movable pressing blocks (420) are magnetically connected to one side of the connecting plate (410). 6. The pressing device according to claim 4, characterized in that, the material of the movable pressing block (420) is polyurethane. 7. The pressing device according to claim 1, characterized in that, the driving module (300) comprises a driving cylinder, and two driving cylinders are respectively arranged at two ends of the pressing module (400), so as to It is used to promote the overall displacement of the compression module (400). 8. The pressing device according to claim 1, characterized in that, the pressing device further comprises a support module (500), one end of the support module (500) is arranged on a horizontal plane, and the support module (500) ) is equipped with the driving module (300) and the pressing module (400) at one end far away from the horizontal plane, the pressing module (400) is installed at one end of the driving module (300) close to the horizontal plane, and the pressing The tight module (400) is movably connected to the supporting module (500). 9. The pressing device according to claim 8, characterized in that, the support module (500) comprises a horizontal support (510) and a vertical support (520) fixedly connected to both ends of the horizontal support (510), The driving module (300) is installed on the horizontal support (510), and the pressing module (400) is movably installed on the vertical support (520) along the vertical direction. 10. The pressing device according to claim 9, characterized in that, the horizontal support (510) comprises a first support (511) distributed along the vertical direction, a second support (512) and a support connecting the first support (512). A bracket (511) and a multi-section connecting rod (513) of said second bracket (512).

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