CN114878078A - Compaction method for tightness test of battery pack - Google Patents

Abstract

The present application relates to a pressing method for air tightness testing of battery packs. The pressing method includes the following steps: using a conveying module to transport a battery pack to be tested, and using an induction module to sense whether the conveying module loaded with the battery pack to be tested is Reaching the preset position, when the sensing module senses that the conveying module has reached the preset position, the sensing module sends a pressing command to the control module, and the control module controls the driving module to drive the pressing module towards the direction close to the upper cover of the battery pack after receiving the pressing command. Move and make the pressing module press the upper cover of the battery pack. After the air tightness test of the battery pack is completed, the control module controls the driving module to drive the pressing module to move away from the upper cover of the battery pack and loosen the pressing module. Open the top cover of the battery pack, and the transport module will carry the tested battery pack away from the preset position. The pressing method provided by the present application solves the problem of low operation efficiency of the existing battery pack pressing operation.

Description

Compression method for battery pack air tightness testing

technical field

The present application relates to the technical field of battery pack testing tooling, and in particular, to a pressing method for battery pack air tightness testing.

Background technique

With the continuous development of society, people use the car more and more frequently. Compared with traditional vehicles, which emit more pollution, new energy vehicles have almost no emission pollution. Therefore, new energy vehicles are becoming more and more popular. Further, 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 weight of the whole vehicle: a large number of lightweight materials are applied to the battery pack, especially the upper cover of the battery pack. Most battery pack covers are constructed of lightweight materials. In addition, the general light-weight materials have poor structural rigidity and are prone to deformation, especially when the battery pack is tested for air tightness, high-pressure gas is charged into the box, causing pressure on the upper cover, causing the upper cover to deform and bulge, and the cavity inside 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 easily deformed, the current mainstream practice is to use a manual pressing tool 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 a worker needs to carry the manual pressing tool to press on the battery pack, so that the operation efficiency of the battery pack pressing operation is greatly reduced.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a pressing method for battery pack airtightness testing to solve the problem of low operation efficiency of the existing battery pack pressing operation.

The pressing method for air tightness testing of battery packs provided by the present application includes the following steps: transporting the battery pack to be tested by using a conveying module; When the sensing module senses that the conveying module reaches the preset position, the sensing module sends a pressing command to the control module. After the control module receives the pressing command, it controls the driving module to drive the pressing module to move towards the direction close to the upper cover of the battery pack, and makes the pressing The module presses the top cover of the battery pack. After the air tightness test of the battery pack is completed, the control module controls the drive module to drive the pressing module to move away from the top cover of the battery pack, and makes the pressing module release the top cover of the battery pack. The transport module carries the tested battery pack away from the preset position.

In one embodiment, the control module is a PLC control cabinet. It can be understood that such setting is beneficial to improve the control stability of the control module.

In one of the embodiments, the sensing module is a position sensor.

In one embodiment, the sensing module is a photoelectric sensor, a Hall sensor, an infrared positioning sensor or an ultrasonic positioning sensor.

In one embodiment, the pressing method further includes the following steps: after the air-tightness test of the battery pack is completed, use the release button to send a release instruction to the control module, and the control module controls the drive module to move away from the battery pack after receiving the release instruction. The direction of the cover is moved, after which the transport module carries the battery pack away from the preset position. It can be understood that this setting is beneficial to enable the transport module to carry the battery pack away from the preset position in time after the air tightness test of the battery pack is completed.

In one embodiment, the pressing module includes a connecting plate and a plurality of movable pressing blocks, the plurality of movable pressing blocks are movably arranged on one side of the connecting plate, and the driving module can drive the connecting plate to drive the movable pressing blocks toward approaching or Move away from the upper cover of the battery pack so that the movable block is pressed tightly or away from the upper cover of the battery pack. It can be understood that this arrangement is beneficial to check the airtightness of the connection of the fasteners on the upper cover of the battery pack.

In one of the embodiments, the connecting plate is provided with a plurality of moving chutes that communicate with each other, the movable pressing block includes a pressing portion and a clamping portion connected to one end of the pressing portion, and the movable pressing block is movably clamped by the clamping portion. It is connected to the moving chute, and the movable pressing block can move along the extending direction of the moving chute. The end face of the pressing part away from the clamping part is provided with a pressing surface, and the movable pressing block can be pressed against the battery through the pressing surface. surface of the cover.

It can be understood that this arrangement is beneficial to improve the firmness of the connection between the movable pressing block and the connecting plate, and does not affect the movement flexibility of the connecting block.

In one embodiment, the moving chute is provided with a conveying guide rail, the conveying guide rail is electrically connected to the control module, and the control module can control the conveying guide rail to move the movable pressing block along the extending direction of the moving chute. It can be understood that this arrangement is conducive to controlling the rearrangement of multiple movable pressing blocks in the moving chute by the control module, effectively avoiding the situation that the pressing module is easy to press the fasteners when pressing the upper covers of different battery packs.

In one of the embodiments, the connecting plate is square, the moving chute includes four quarter-arc-shaped branch chutes, the four branch chutes are connected end to end, and the circle centers of the four branch chutes are respectively located on the connecting plate at the four vertices.

In one embodiment, the moving chutes include m transverse branch chutes and n longitudinal branch chutes, the transverse branch chutes and the longitudinal branch chutes are alternately connected, and both m and n are greater than or equal to 1 is a natural number.

Compared with the prior art, the pressing method for the air tightness test of the battery pack provided by the present application judges whether the conveying module reaches the preset position through the sensing module, and when the conveying module reaches the preset position, the sensing module passes Send a pressing command to the control module, and then control the driving module to drive the pressing module to act through the control module. In this way, the automation degree of the battery pack pressing operation is greatly improved, and it is beneficial to precisely locate the position of the conveying module, so that the conveying module can accurately move the battery pack to a preset position. Further, the operation method of pressing the upper cover of the battery pack by using the automatic pressing operation mode instead of the manual pressing tooling effectively reduces the operation difficulty of pressing the upper cover of the battery pack, and improves the operation of the battery pack. Efficiency of the compaction operation. Furthermore, the battery pack to be tested is carried to or away from the preset position by the conveying module, without the need for staff to carry the battery pack, thereby further improving the work 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 in the traditional technology, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the traditional technology. Obviously, the drawings in the following description are only the For some embodiments of the application, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

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

2 is a schematic structural diagram of a movable pressing block according to an embodiment of the present application;

3 is a schematic structural diagram of a connecting board 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 numerals: 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, 422, pressing part; 423, pressing surface; 500, supporting module; 510, horizontal bracket; 511, first bracket; 512, second bracket; 513, connecting rod; 520, vertical bracket; 530 , Reinforcing ribs; 600, induction module; 700, release button.

Detailed ways

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "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 accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" 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 level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. 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. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not 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 terms used herein in the specification of the present application are for the purpose of describing particular embodiments only, and are not intended to limit the present 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 the car more and more frequently. Compared with traditional vehicles, which emit more pollution, new energy vehicles have almost no emission pollution. Therefore, new energy vehicles are becoming more and more popular. Further, the battery pack 100 is the main source of power for the new energy vehicle. 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 whole vehicle: a large number of lightweight materials are applied to the battery pack 100, especially the battery pack 100. Cover, most battery pack 100 covers are constructed of lightweight materials. In addition, the general light-weight 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, and the box is empty. The cavity volume becomes larger and the inflation time becomes longer.

Generally, in order to solve the problem that the upper cover of the battery pack 100 is easily deformed, the current mainstream practice 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 weight of the above-mentioned manual pressing tool is relatively large, and it is necessary for the staff to carry the manual pressing tool and press it on the battery pack 100, so that the battery pack 100 is easily damaged. And the efficiency of the compacting operation of the battery pack 100 may be reduced.

Please refer to FIG. 1 , in order to solve the problems of difficult operation and low work efficiency of the existing pressing tool, the present application provides a pressing device for air tightness testing of a battery pack 100 , the pressing device includes a conveying module 200 , the driving module 300 and the pressing 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. direction move.

When the battery pack 100 starts the air tightness test, the driving module 300 drives the pressing module 400 to move toward the direction close to the upper cover of the battery pack 100, so that the pressing module 400 is pressed against the surface of the upper cover of the battery pack 100, thereby preventing the battery The bag 100 bulged during the air tightness test. When the battery pack 100 finishes the air tightness test, the driving module 300 drives the pressing module 400 to move away from the upper cover of the battery pack 100 , so that the transport module 200 can carry the battery pack 100 away from the preset position. In this way, the pressing and separating operations of the pressing module 400 on the upper cover of the battery pack 100 are realized by the driving module 300, instead of the operation mode of pressing the upper cover of the battery pack 100 by a manual pressing tool, which effectively reduces the number of pressure on the battery pack 100. It is difficult for the upper cover 100 to perform the pressing operation, and the efficiency of the pressing operation of the battery pack 100 will be improved. Further, 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 work efficiency of the battery pack 100 pressing operation.

Further, in one embodiment, as shown in FIG. 1 , the conveying module 200 may be a mobile transport vehicle. Further, the mobile transport vehicle may be an AGV trolley. It should be noted that the full name of AGV is: Automated Guided Vehicle, usually also called AGV car. Specifically, the AGV car refers to a transport vehicle equipped with an electromagnetic automatic navigation device or an optical automatic navigation device, capable of traveling 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 battery pack 100 pressing operation. But not limited to this, 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 may also be a conveyor belt conveying structure. Specifically, the conveyor belt conveying structure drives the conveyor belt to convey one or more battery packs 100 by a conveying motor, so as to implement a pipelined operation for air tightness testing of the battery packs 100 . In addition, 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 by bumps or vibrations.

Usually, the upper cover of the battery pack 100 is connected to other parts of the battery pack 100 through fasteners, and the parts of the upper cover of the battery pack 100 where the fasteners are pierced are prone to leakage problems. Therefore, in order to facilitate the inspection of the upper cover of the battery pack 100 Air tightness of fastener joints. In one embodiment, as shown in FIG. 1 , the pressing module 400 includes a connecting plate 410 and a plurality of movable pressing blocks 420 . 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 is 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 occurs, 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 does not overlap with the fasteners. In this way, 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.

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 a plurality of The moving chute 411 communicated 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 , and 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 an 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 pressure block 420 can be moved on the connecting plate 410 along the pre-set moving chute 411 , which greatly improves the movement flexibility of the movable pressure block 420 , and the movable pressure block 420 is movably clamped through the clamping portion 421 . For the connecting plate 410, the connection firmness of the movable pressing block 420 and the connecting plate 410 is greatly improved, thereby improving the structural strength of the pressing device.

Further, in an embodiment, as shown in FIG. 3 , the connecting plate 410 is square, and the moving chute 411 includes four quarter-arc-shaped branch chute 412 , and the four branch chute 412 are connected end to end. , and the centers of the four branch chutes 412 are located at the four vertices of the connecting plate 410 respectively. In other embodiments, the moving chute 411 includes m transverse branch chute 412 and n longitudinal branch chute 412. is a natural number greater than or equal to 1. Specifically, as shown in FIG. 4 , the moving chute 411 includes three lateral branching chute 412 and three longitudinal branching chute 412 . But it is not limited to this, and the moving chute 411 may also have other shapes, which are not listed here.

In other embodiments, in order to facilitate the movement of the movable pressure block 420 to different positions of the connecting plate 410 , the connecting plate 410 and the movable pressure block 420 may also be magnetically connected, and the plurality of movable pressure 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 of the connecting plate 410 , which greatly improves the adjustment flexibility of the pressing module 400 .

In order to prevent the movable pressure block 420 from damaging the upper cover of the battery pack 100 , in one embodiment, the material of the movable pressure block 420 is polyurethane, which has certain elasticity and strong wear resistance, and uses The movable pressing block 420 made of polyurethane has certain 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 an embodiment, as shown in FIG. 1 , the driving module 300 includes a driving cylinder, and two driving cylinders are respectively disposed at both ends of the pressing module 400 for pushing the pressing module 400 overall displacement. In other embodiments, the driving module 300 may also be a driving motor, so that the driving precision 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 FIG. 1 , the pressing device further includes a support module 500, one end of the support module 500 is disposed on the horizontal plane, and the support module 500 is far from the horizontal plane. A driving module 300 and a pressing module 400 are installed at one end. The pressing module 400 is installed at one end of the driving module 300 close to the horizontal plane, and the pressing module 400 is movably connected to the supporting module 500 . Specifically, in one embodiment, as shown in FIG. 1 , the support module 500 includes a horizontal bracket 510 and a vertical bracket 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 installed along the horizontal bracket 510 . It is movably mounted on the vertical bracket 520 in the vertical direction. Further, in order to reduce the total weight of the horizontal support 510, in one embodiment, as shown in FIG. 1 , the horizontal support 510 includes a first support 511, a second support 512 and a connecting first support 511 distributed along the vertical direction and the multi-section connecting rod 513 of the second bracket 512 . Further, in order to improve the structural strength of the horizontal support 510, in one embodiment, as shown in FIG. Reinforcing ribs 530 are arranged therebetween.

Referring to FIG. 1 , in order to improve the operation efficiency of the pressing operation on the upper cover of the battery pack 100 , the present application also provides a pressing method for the air tightness test of the battery pack 100 . The pressing method includes the following steps: using The transport module 200 transports the battery pack 100 to be tested, and uses the sensing module 600 to sense whether the transport module 200 loaded with the battery pack 100 to be tested reaches a preset position. When the sensing module 600 senses that the conveying module 200 has reached the preset position, the sensing module 600 sends a pressing command to the control module (not shown), and the control module controls the driving module 300 to drive the pressing module 400 to approach the battery after receiving the pressing command. The direction of the upper cover of the pack 100 is moved, and the pressing module 400 is pressed against the upper cover of the battery pack 100 . After the air tightness 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 makes the pressing module 400 release the upper cover of the battery pack 100 . After that, the transport module 200 carries the tested battery pack 100 away from the preset position.

It is judged by the sensing module 600 whether the conveying module 200 reaches the preset position, and when the conveying module 200 reaches the preset position, the sensing module 600 sends a pressing instruction to the control module, and then controls the driving module 300 to drive the pressing module through the control module. 400 actions. In this way, the automation degree of the pressing operation of the battery pack 100 is greatly improved, and the position of the conveying module 200 is precisely positioned, so that the conveying module 200 can accurately move the battery pack 100 to a preset position. Further, the operation mode 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 operation difficulty of pressing the upper cover of the battery pack 100, and improves the performance of the battery pack 100. Efficiency of the pack 100 compaction operation. Furthermore, the battery pack 100 to be tested is transported to or away from the preset position by the transport module 200 , without the need for staff to carry the battery pack 100 , thereby further improving the work efficiency of the battery pack 100 pressing operation.

In one embodiment, the control module may be a PLC control cabinet. It should be noted that the PLC control cabinet refers to the 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, scalability and strong anti-interference. But not limited to this, in other embodiments, the control module may also be a microcontroller, an industrial computer, or other control elements, which are not listed one by one here.

In one embodiment, the sensing module 600 may be a position sensor, which is a sensor capable of sensing the position of the object under test (transport 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 will not be listed one by one here.

Further, in order to facilitate the completion of the air tightness test of the battery pack 100, the transport module 200 can timely carry 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 air tightness test of the battery pack 100 is completed, the release button 700 is used to send a release instruction to the control module, and the control module receives the release instruction. After the release instruction, the driving module 300 is controlled to move in a direction away from the upper cover of the battery pack 100 , and then the conveying module 200 carries the battery pack 100 away from the preset position.

Further, the moving chute 411 is provided with a conveying guide rail (not shown), the conveying guide rail is electrically connected to the control module, and the control module can control the conveying guide 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 the plurality of movable pressing blocks 420 to be rearranged in the moving chute 411 , effectively avoiding the situation that the pressing device is likely to press the fasteners when pressing the upper covers of different battery packs 100 .

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application should be governed by the appended claims.

Claims (10)

1. A compression method for a cell pack (100) hermeticity test, comprising the steps of:

a battery pack (100) to be tested is transported by a transport module (200),

sensing whether the conveying module (200) loaded with the battery pack (100) to be tested reaches a preset position by using a sensing module (600),

when the sensing module (600) senses that the conveying module (200) reaches the preset position, the sensing module (600) sends a pressing instruction to the control module, the control module controls the driving module (300) to drive the pressing module (400) to move towards the direction close to the upper cover of the battery pack (100) after receiving the pressing instruction, and the pressing module (400) is enabled to press 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 towards a direction away from the upper cover of the battery pack (100) and enables the pressing module (400) to release the upper cover of the battery pack (100),

the conveying module (200) carries the tested battery pack (100) away from a preset position.

2. The compaction method of claim 1 wherein the control module is a PLC control cabinet.

3. The compaction method according to claim 1, wherein the sensing module (600) is a position sensor.

4. The compaction method according to claim 1, wherein the sensing module (600) is a photoelectric sensor, a hall sensor, an infrared positioning sensor or an ultrasonic positioning sensor.

5. The compaction method of claim 1, further comprising the steps of: after the air tightness test of the battery pack (100) is completed, a release instruction is sent to the control module by using a release button (700), the control module receives the release instruction and then controls the driving module (300) to move towards the direction far away from the upper cover of the battery pack (100), and then the conveying module (200) carries the battery pack (100) away from a preset position.

6. The compacting method according to claim 1, wherein the compacting module (400) comprises a connecting plate (410) and a plurality of movable compacts (420), the plurality of movable compacts (420) are movably disposed on one side of the connecting plate (410), and the driving module (300) is capable of driving the connecting plate (410) to drive the movable compacts (420) to move towards a direction close to or away from the upper cover of the battery pack (100), so that the movable compacts (420) are compacted or away from the upper cover of the battery pack (100).

7. The pressing method according to claim 6, wherein the connecting plate (410) is provided with a plurality of mutually communicated moving sliding grooves (411), the movable pressing block (420) comprises a pressing portion (422) and a clamping portion (421) connected to one end of the pressing portion (422), the movable pressing block (420) is movably clamped in the moving sliding grooves (411) through the clamping portion (421), the movable pressing block (420) can move along the extending direction of the moving sliding grooves (411), a pressing surface (423) is arranged on one side end surface of the pressing portion (422) far away from the clamping portion (421), and the movable pressing block (420) can be pressed on the surface of the upper cover of the battery pack (100) through the pressing surface (423).

8. The compaction method according to claim 7, wherein a transfer rail is arranged in the moving chute (411), the transfer rail is electrically connected with the control module, and the control module can control the transfer rail to move the movable compaction block (420) along the extending direction of the moving chute (411).

9. The compacting method according to claim 7, wherein the connecting plate (410) is square, the moving chute (411) comprises four quarter-arc branch chutes (412), the four branch chutes (412) are connected end to end, and centers of the four branch chutes (412) are respectively located at four vertexes of the connecting plate (410).

10. The compacting method according to claim 7, wherein the moving chute (411) comprises m transverse branch chutes (412) and n longitudinal branch chutes (412), the transverse branch chutes (412) and the longitudinal branch chutes (412) are in staggered communication, and m and n are both natural numbers greater than or equal to 1.

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