A packaging mechanism

Abstract

The utility model discloses a kind of packaging mechanisms, comprising: heat sealing assembly, heat sealing assembly includes two end caps for heat sealing to electric core, two end caps are oppositely arranged and formed with accommodating space, accommodating space is used to accommodate electric core, at least one end cap is provided with liquid guide groove, liquid guide groove is communicated with accommodating space, to be used for providing flow-through space for electrolyte when heat sealing electric core.The utility model aims at solving how to reduce the technical problem of electrolyte residue in soft package battery heat sealing area.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a packaging mechanism. Background Technology

[0002] Existing packaging equipment for digital pouch batteries typically uses a heat-sealing mechanism to seal the aluminum-plastic film in a vacuum environment. The packaging process is as follows: after detecting that the pouch battery is in place, a servo motor drives the upper and lower cavities to close; after the cavities close, a vacuum is drawn through a vacuum pipeline; after the first vacuum is completed, the piercing mechanism moves down to pierce the battery surface to release the electrolyte and then resets; a second vacuum is performed to further reduce the residual gas inside the cavity and battery; after about 3 seconds, the upper and lower sealing heads approach each other and are heated, so that the aluminum-plastic film melts and adheres under the set pressure and temperature to complete the heat sealing; then the sealing heads and cavities are reset, and the finished battery enters the next process via a conveyor line.

[0003] However, during the heat-sealing process, electrolyte may remain in the heat-sealing area of ​​the pouch battery. When the heat-sealing head is heated and pressurized, the residual electrolyte can cause poor fusion, incomplete welding, or blistering of the aluminum-plastic film at the heat-sealing point, leading to decreased seal strength and leakage risk. Furthermore, during the hot-pressing process, the residual electrolyte may cause localized pressure damage to the aluminum-plastic film of the cell, forming a packaging defect. This can lead to electrolyte migration to the upper and lower sealing head surfaces, causing contamination of the sealing head, resulting in foreign matter adhesion or corrosion on the heat-sealing surface. This further reduces the sealing consistency and yield of subsequent products and increases equipment maintenance frequency and downtime. These problems not only affect the appearance and sealing reliability of the pouch battery but may also adversely affect the battery's cycle life and safety. Therefore, how to reduce electrolyte residue in the heat-sealing area of ​​pouch batteries has become a technical problem that urgently needs to be solved in existing pouch battery packaging processes. Utility Model Content

[0004] One objective of this invention is to provide a packaging mechanism that addresses the technical problem of reducing electrolyte residue in the heat-sealed area of ​​a pouch battery.

[0005] To achieve the above objectives, the present invention provides a solution as follows: a packaging mechanism, comprising: a heat sealing assembly, the heat sealing assembly including two end caps for heat sealing the battery cell, the two end caps being arranged opposite each other and forming a receiving space for accommodating the battery cell, at least one end cap having a liquid inlet groove communicating with the receiving space to provide a flow space for electrolyte during heat sealing of the battery cell.

[0006] Optionally, the end cap includes a heat-sealing section and a draining section. The heat-sealing section is used to heat-seal the battery cell, and the liquid inlet groove is located in the draining section.

[0007] Optionally, there may be multiple liquid inlet tanks, which are spaced apart along the length of the liquid discharge section.

[0008] Optionally, the encapsulation mechanism includes a puncture section and a liquid collection assembly. The puncture section is used to puncture the battery cell to release excess electrolyte. The liquid collection assembly is disposed below the puncture section to collect the released excess electrolyte.

[0009] Optionally, the liquid collection assembly includes a limiting member and a liquid collection member disposed below the puncture part. The liquid collection member is disposed on the side of the limiting member away from the puncture part. An insertion channel is formed between the limiting member and the liquid collection member. The insertion channel passes through the liquid collection assembly in a direction close to the heat sealing assembly so that the power core can be inserted into the insertion channel. The limiting component has a clearance channel that is connected to the insertion channel. The clearance channel is used for the piercing part to pass through and pierce the battery cell. The liquid collecting device has a liquid collecting channel, which is connected to the insertion channel. The liquid collecting channel is used to collect electrolyte.

[0010] Optionally, the liquid collecting device includes a first sub-part and a plurality of second sub-parts. A liquid collecting channel is formed in the first sub-part, and the plurality of second sub-parts are spaced apart in the liquid collecting channel to separate the liquid collecting channel to form a plurality of first sub-channels. The first sub-channels are connected to the insertion channel, and the plurality of second sub-parts are used to support the battery cell in the insertion channel.

[0011] Optionally, the liquid collecting component has an overflow channel that passes through the side of multiple second sub-parts near the insertion channel and is connected to the insertion channel and the first sub-channel respectively.

[0012] Optionally, the first sub-part includes a first wall, which is disposed opposite to the insertion channel. The first wall is inclined relative to the vertical direction and is connected between the second sub-part and the first sub-part.

[0013] Optionally, a first collection port is formed on the side of the first sub-part away from the insertion channel; The liquid collection channel includes a second sub-channel and a second collection port, and the second sub-channel is connected to the insertion channel through the first collection port; The liquid collecting component includes a third sub-part, which is located on the side of the first sub-part away from the insertion channel. The third sub-part includes a first plate and two opposing second plates. The first plate is connected between the two second plates, and the second plates are connected to the first sub-part. The two second plates and the first plate surround to form a second sub-channel. A second collection port is opened on the first plate, and the projection of the first collection port on the surface of the second plate is inside the second plate.

[0014] Optionally, the first plate is recessed at the second collection port in a direction away from the first sub-section.

[0015] Optionally, the packaging mechanism includes a tray assembly, which includes a support and a drive. The drive has a guide groove with its inner wall inclined relative to the vertical direction. The support includes a base and an abutment connected to the base. The base supports the battery cell, and the abutment is inserted into the guide groove and abuts against the inner wall of the guide groove. When the drive moves, the abutment moves along the inner wall of the guide groove toward or away from the receiving space.

[0016] The beneficial effects of this utility model are as follows: The encapsulation mechanism includes a heat-sealing assembly, comprising two end caps for heat-sealing the battery cell, the two end caps being arranged opposite each other and forming a receiving space for accommodating the battery cell, and at least one end cap having a liquid inlet groove communicating with the receiving space to provide a flow space for electrolyte during heat-sealing of the battery cell.

[0017] In practical applications, when using this packaging mechanism for heat sealing, the portion of the aluminum-plastic film of the battery cell to be heat-sealed is inserted into the receiving space. When the upper and lower end caps are heated and move towards the aluminum-plastic film of the battery cell, the electrolyte in the heat-sealing area will enter the liquid-leading tank under the action of the pressure gradient, thereby guiding the electrolyte that might have been retained in the heat-sealing area into the liquid-leading tank and then into the receiving space. As the end caps continue to apply pressure and complete the fusion of the aluminum-plastic film, the electrolyte that has been diverted by the liquid-leading tank will no longer remain in the heat-sealing area. This suppresses the phenomena of incomplete welding, blistering, and local stress concentration caused by the interference of residual electrolyte in the aluminum-plastic film in the heat-sealing area. At the same time, it reduces the formation of packaging defects in the aluminum-plastic film, which could lead to the electrolyte migrating to the surface of the upper and lower end caps and causing contamination of the end caps. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the heat-sealing assembly provided in this embodiment of the utility model; Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified view of a portion of region A in the middle; Figure 3 This is a schematic diagram of the structure of the heat-sealing assembly provided in this embodiment of the utility model; Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region B in the middle; Figure 5 This is a schematic diagram illustrating the structure of the liquid collection assembly provided in this embodiment of the utility model; Figure 6 This is a cross-sectional structural diagram of the liquid collection assembly provided in an embodiment of the present invention; Figure 7 This is a structural schematic diagram of a display tray assembly provided by an embodiment of the present invention.

[0020] Explanation of icon numbers: 20. Heat-sealing assembly; 21. End cap; 211. Liquid inlet groove; 22. Receiving space; 30. Puncture section; 40. Liquid collection assembly; 41. Limiting component; 42. Liquid collection component; 421. First sub-part; 4211. First wall; 422. Second sub-part; 423. Third sub-part; 4231. First plate; 4232. Second plate; 424. Overflow channel; 43. Insertion channel; 44. Clearance channel; 45. Liquid collection channel; 451. First sub-channel; 452. First collection port; 453. Second sub-channel; 454. Second collection port; 50. Tray assembly; 51. Support component; 511. Base; 512. Abutment part; 52. Driving component; 521. Guide groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the structure of the heat-sealing assembly 20 provided in this embodiment of the utility model. Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified view of a portion of region A in the middle. Figure 3 This is a schematic diagram of the structure of the heat-sealing assembly 20 provided in this embodiment of the utility model. Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region B in the middle.

[0023] This utility model provides a packaging mechanism, including a heat sealing assembly 20. The heat sealing assembly 20 includes two end caps 21 for heat sealing a battery cell. The two end caps 21 are arranged vertically opposite each other and form a receiving space 22 for accommodating the battery cell. At least one end cap 21 has a liquid inlet groove 211, which is connected to the receiving space 22 to provide a flow space for electrolyte during the heat sealing of the battery cell.

[0024] In practical applications, when using this packaging mechanism for heat sealing, the portion of the aluminum-plastic film of the battery cell to be heat-sealed is inserted into the receiving space 22. When the upper and lower end caps 21 are heated and move towards the aluminum-plastic film of the battery cell, the electrolyte in the heat-sealing area will enter the liquid inlet 211 under the action of the pressure gradient, thereby guiding the electrolyte that might have been retained in the heat-sealing area into the liquid inlet 211 and into the receiving space 22 through the liquid inlet 211. As the end caps 21 continue to apply pressure and complete the fusion of the aluminum-plastic film, the electrolyte that has been diverted by the liquid inlet 211 no longer remains in the heat-sealing area, thereby suppressing the phenomenon of false welding, blistering and local stress concentration caused by the interference of residual electrolyte in the aluminum-plastic film in the heat-sealing area. At the same time, it reduces the formation of packaging defects in the aluminum-plastic film, which could lead to the electrolyte migrating to the surface of the upper and lower end caps 21 and causing the end caps 21 to be contaminated.

[0025] In one embodiment, see Figure 4 The end cap 21 includes a heat-sealing section and a liquid discharge section. The heat-sealing section is used to heat-seal the battery cell, and the liquid inlet trough 211 is located in the liquid discharge section.

[0026] In practical applications, during the heat sealing process, the end cap 21 is divided into a heat sealing section and a liquid discharge section. The heat sealing section contacts the aluminum-plastic film area corresponding to the battery cell and achieves the melting and bonding of the aluminum-plastic film according to the predetermined pressure and temperature. The liquid discharge section is used to guide the electrolyte to flow into the liquid inlet tank 211 along the direction of the liquid discharge section, so that the main sealing interface where the heat sealing section is located can be kept as dry and in stable contact as possible.

[0027] Furthermore, there are multiple liquid inlet tanks 211, which are spaced apart along the length of the liquid discharge section.

[0028] In practical applications, after the electrolyte is squeezed out from the heat-sealing area, it can flow to multiple liquid inlet tanks 211. When a liquid inlet tank 211 is partially full or overflows, the overflowing liquid can flow to the adjacent liquid inlet tank 211 under the combined action of continuous pressure and surface tension, thereby realizing the diversion and temporary storage of the electrolyte. This allows the electrolyte to be temporarily stored in multiple liquid inlet tanks 211, reducing the situation where electrolyte flows back to the heat-sealing area due to saturation of a single tank.

[0029] In one embodiment, see Figure 2 and Figure 5 The encapsulation mechanism includes a puncture section 30 and a liquid collection assembly 40. The puncture section 30 is used to puncture the battery cell to release excess electrolyte. The liquid collection assembly 40 is disposed below the puncture section 30 to collect the released excess electrolyte.

[0030] In practical applications, during the use of the packaging mechanism, when the battery cell enters the packaging station, the piercing part 30 first punctures the battery cell in a directional manner, so that the excess electrolyte generated inside the battery cell due to liquid injection or formation is discharged out through the piercing hole by gravity and the pressure difference between the inside and outside; at the same time, the liquid collection component 40, because it is set below the piercing part 30, can collect the discharged liquid along the path of the electrolyte flowing down naturally, so as to avoid the electrolyte from stagnating and spreading inside the aluminum-plastic film of the battery cell or at the packaging station.

[0031] Further, see Figure 5 and Figure 6 The liquid collection assembly 40 includes a limiting member 41 and a liquid collection member 42 disposed below the puncture part 30. The liquid collection member 42 is disposed on the side of the limiting member 41 away from the puncture part 30. An insertion channel 43 is formed between the limiting member 41 and the liquid collection member 42. The insertion channel 43 penetrates the liquid collection assembly 40 in a direction close to the heat sealing assembly 20 so that the power core can be inserted into the insertion channel 43. The limiting member 41 has a clearance channel 44, which is connected to the insertion channel 43. The clearance channel 44 is used for the piercing part 30 to pass through and pierce the battery cell. The liquid collecting device 42 has a liquid collecting channel 45, which is connected to the insertion channel 43. The liquid collecting channel 45 is used to collect electrolyte.

[0032] In practical applications, during the use of the packaging mechanism, the aluminum-plastic film of the battery cell is guided along the insertion channel 43 to directly below the puncture part 30. At this time, the limiting member 41 and the liquid collecting member 42 provide support and limit the posture of the aluminum-plastic film of the battery cell. Then, the puncture part 30 punctures the aluminum-plastic film of the battery cell and inserts into the insertion channel 43. The electrolyte is discharged out through the punctured position of the aluminum-plastic film of the battery cell into the insertion channel 43. Then, under the action of gravity and internal and external pressure difference, the electrolyte is injected from the insertion channel 43 into the liquid collecting channel 45, thereby preventing the electrolyte from flowing back or overflowing in the area between the limiting member 41 and the puncture part 30.

[0033] Furthermore, referring to Figure 6 The liquid collecting component 42 includes a first sub-part 421 and a plurality of second sub-parts 422. A liquid collecting channel 45 is formed in the first sub-part 421. The plurality of second sub-parts 422 are spaced apart in the liquid collecting channel 45 to separate the liquid collecting channel 45 to form a plurality of first sub-channels 451. The first sub-channels 451 are connected to the insertion channel 43. The plurality of second sub-parts 422 are used to support the battery cells in the insertion channel 43.

[0034] In practical applications, multiple spaced second sub-sections 422 provide support for the battery cell in the area communicating with the insertion channel 43, and provide space for the electrolyte to flow in the first sub-channel 451. This maintains the stability of the battery cell's posture in the insertion channel 43, and allows the electrolyte to flow along the second sub-sections 422 to the first sub-sections 421, and then to the collection channel 45, thereby reducing electrolyte residue in the insertion channel 43.

[0035] Optionally, refer to Figure 6 The liquid collecting component 42 has an overflow channel 424, which passes through a plurality of second sub-parts 422 on the side near the insertion channel 43 and is connected to the insertion channel 43 and the first sub-channel 451 respectively.

[0036] In practical applications, the overflow channel 424 extends along the side of the multiple second sub-sections 422 near the insertion channel 43 and is connected to both the insertion channel 43 and the first sub-channel 451. Thus, when the flow rate in the first sub-channel 451 is too high, the electrolyte can be diverted through the overflow channel 424 to the adjacent first sub-channel 451, thereby promptly removing accumulated electrolyte from the insertion channel 43 without affecting the support of the second sub-sections 422 for the battery cell, and keeping the insertion channel 43 clean.

[0037] Optionally, refer to Figure 6 The first sub-part 421 includes a first wall 4211, which is disposed opposite to the insertion channel 43. The first wall 4211 is inclined relative to the vertical direction and is connected between the second sub-part 422 and the first sub-part 421.

[0038] In practical applications, the electrolyte is injected from the insertion channel 43 into the first wall 4211 of the collection channel 45 under the action of gravity and internal and external pressure difference, and flows along the first wall 4211 under the action of gravity. The first wall 4211 can guide the electrolyte to the designated position, thereby facilitating the collection of the electrolyte.

[0039] Optionally, refer to Figure 6 The first sub-channel 451 passes through the first sub-part 421 and forms a first collection port 452 on the side away from the insertion channel 43; The liquid collection channel 45 includes a second sub-channel 453 and a second collection port 454. The second sub-channel 453 is connected to the insertion channel 43 through the first collection port 452. The liquid collecting component 42 includes a third sub-part 423, which is located on the side of the first sub-part 421 away from the insertion channel 43. The third sub-part 423 includes a first plate 4231 and two oppositely arranged second plates 4232. The first plate 4231 is connected between the two second plates 4232, and the second plates 4232 are connected to the first sub-part 421. The two second plates 4232 and the first plate 4231 surround to form a second sub-channel 453. A second collection port 454 is opened on the first plate 4231, and the projection of the first collection port 452 on the surface of the second plate 4232 is inside the second plate 4232.

[0040] In practical applications, the electrolyte enters the first sub-channel 451 through the insertion channel 43 and flows into the second sub-channel 453 through the first collection port 452. Since the first collection port 452 is located on the side of the first sub-part 421 away from the insertion channel 43 and its projection on the surface of the second plate 4232 is located inside the second plate 4232, after the electrolyte flows out of the first collection port 452 under the action of gravity, it preferentially drips onto the surface of the first plate 4231 and flows to the second collection port 454 through the surface of the first plate 4231, reducing the electrolyte residue on the two second plates 4232.

[0041] Further, refer to Figure 6 The first plate 4231 is recessed at the second collection port 454 in a direction away from the first sub-part 421.

[0042] In practical applications, when the first plate 4231 is recessed at the second collection port 454 in a direction away from the first sub-part 421, the electrolyte is guided to flow to the second collection port 454, thereby reducing the electrolyte residue on the first plate 4231.

[0043] In one embodiment, reference Figure 7 The packaging mechanism includes a tray assembly 50, which includes a support member 51 and a drive member 52. The drive member 52 has a guide groove 521, and the inner wall of the guide groove 521 is inclined relative to the vertical direction. The support member 51 includes a base 511 and an abutment portion 512 connected to the base 511. The base 511 is used to support the battery cell. The abutment portion 512 is inserted into the guide groove 521 and abuts against the inner wall of the guide groove 521. When the drive member 52 moves, the abutment portion 512 moves along the inner wall of the guide groove 521 toward or away from the receiving space 22.

[0044] In practical applications, during assembly and positioning, when the tray assembly 50 is working and the inner wall of the guide groove 521 is inclined relative to the vertical direction, the abutment part 512 is inserted and always abuts against the inclined inner wall. As the drive member 52 makes horizontal or axial process displacement, the inclined inner wall decomposes the translational motion of the drive member 52 into a component and transmits it along its normal direction to the abutment part 512, causing the abutment part 512 to produce controlled lifting or pressing displacement. Since the abutment part 512 is connected to the base 511, this displacement is synchronously transmitted to the base 511 for supporting the aluminum-plastic film of the battery cell, so that the aluminum-plastic film of the battery cell carried by the base 511 can continuously move closer or further away from the accommodating space 22, thereby facilitating the adjustment of the position of the aluminum-plastic film of the battery cell and reducing the situation where the aluminum-plastic film is pulled during heat sealing due to misalignment of the aluminum-plastic film of the battery cell.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0046] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0047] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A packaging mechanism, characterized in that, include: A heat-sealing assembly includes two end caps for heat-sealing a battery cell. The two end caps are arranged opposite each other and form a receiving space for accommodating the battery cell. At least one end cap has a liquid inlet groove that communicates with the receiving space to provide a flow space for electrolyte during heat-sealing of the battery cell.

2. The packaging mechanism according to claim 1, characterized in that, The end cap includes a heat-sealing section and a liquid-draining section. The heat-sealing section is used to heat-seal the battery cell, and the liquid-leading groove is located in the liquid-draining section.

3. The packaging mechanism according to claim 2, characterized in that, There are multiple liquid inlet channels, and the multiple liquid inlet channels are spaced apart along the length of the liquid discharge section.

4. The packaging mechanism according to claim 1, characterized in that, The encapsulation mechanism includes a puncture section and a liquid collection assembly. The puncture section is used to puncture the battery cell to release excess electrolyte. The liquid collection assembly is disposed below the puncture section to collect the released excess electrolyte.

5. The packaging mechanism according to claim 4, characterized in that, The liquid collection assembly includes a limiting member and a liquid collection member disposed below the puncture part. The liquid collection member is disposed on the side of the limiting member away from the puncture part. An insertion channel is formed between the limiting member and the liquid collection member. The insertion channel passes through the liquid collection assembly in a direction close to the heat sealing assembly so that the battery cell can be inserted into the insertion channel. The limiting member has a clearance channel, which is connected to the insertion channel. The clearance channel is used for the piercing part to pass through and pierce the battery cell. The liquid collecting device has a liquid collecting channel, which is connected to the insertion channel and is used to collect the electrolyte.

6. The packaging mechanism according to claim 5, characterized in that, The liquid collecting device includes a first sub-part and a plurality of second sub-parts. The liquid collecting channel is formed in the first sub-part. The plurality of second sub-parts are spaced apart in the liquid collecting channel to separate the liquid collecting channel and form a plurality of first sub-channels. The first sub-channels are connected to the insertion channel. The plurality of second sub-parts are used to support the battery cell in the insertion channel.

7. The packaging mechanism according to claim 6, characterized in that, The liquid collecting component has an overflow channel that passes through one side of the second sub-parts near the insertion channel and is connected to both the insertion channel and the first sub-channel.

8. The packaging mechanism according to claim 6, characterized in that, The first sub-part includes a first wall, which is disposed opposite to the insertion channel. The first wall is disposed at an angle relative to the vertical direction and is connected between the second sub-part and the first sub-part.

9. The packaging mechanism according to claim 6, characterized in that, The first sub-channel extends through the first sub-part and forms a first collection port on the side away from the insertion channel; The liquid collection channel includes a second sub-channel and a second collection port, and the second sub-channel is connected to the insertion channel through the first collection port; The liquid collection component includes a third sub-part, which is located on the side of the first sub-part away from the insertion channel. The third sub-part includes a first plate and two opposing second plates. The first plate is connected between the two second plates. The second plates are connected to the first sub-part. The two second plates and the first plate surround to form a second sub-channel. The second collection port is opened on the first plate. The projection of the first collection port on the surface of the second plate is inside the second plate.

10. The packaging mechanism according to claim 9, characterized in that, The first plate is recessed at the second collection port in a direction away from the first sub-section.

11. The packaging mechanism according to claim 1, characterized in that, The device includes a tray assembly, which comprises a support member and a drive member. The drive member has a guide groove with its inner wall inclined relative to the vertical direction. The support member includes a base and an abutment portion connected to the base. The base is used to support the battery cell. The abutment portion is inserted into the guide groove and abuts against the inner wall of the guide groove. When the drive member moves, the abutment portion moves along the inner wall of the guide groove toward or away from the receiving space.

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