Position-limiting flattening structure and vacuum pre-sealing equipment for soft package battery

Abstract

The utility model discloses a kind of limiting smoothing structure and soft package battery vacuum pre-sealing equipment, it is related to soft package battery technical field, limiting smoothing structure includes first smoothing drive structure, second smoothing drive structure and at least one smoothing component, smoothing component includes first limiting smoothing piece and second limiting smoothing piece, under the action of first smoothing drive structure and second smoothing drive structure, first limiting smoothing piece and second limiting smoothing piece can be close or far away. Soft package battery vacuum pre-sealing equipment includes upper shell, lower shell, vacuum structure, pre-sealing head structure, battery clamping structure and limiting smoothing structure, upper shell and lower shell can be buckled and form pre-sealing cavity, vacuum structure is communicated with pre-sealing cavity, limiting smoothing structure is located between pre-sealing head structure and battery clamping structure. The utility model can solve the problem of battery performance deterioration caused by battery gas bag deformation bending under high vacuum degree.

Description

Technical Field

[0001] This utility model relates to the field of soft-pack battery technology, and in particular to a limiting and smoothing structure and a vacuum pre-sealing device for soft-pack batteries. Background Technology

[0002] A pouch battery is a battery that uses aluminum-plastic film as the cell encapsulation material. It is characterized by its light weight, high energy density, flexible design, and excellent safety performance, because even in extreme situations, pouch batteries typically only bulge or crack, rather than explode.

[0003] Vacuum pre-sealing of pouch batteries is an important step in the battery packaging process. It usually occurs after the battery is filled with electrolyte and aims to remove gas and excess electrolyte from inside the battery and to preliminarily seal the battery.

[0004] During the vacuum pre-sealing process of pouch batteries, the battery gas bag is prone to deformation and bending under high vacuum conditions. This deformation and bending can lead to misalignment of the membrane and shell, causing pre-sealing folds and uneven pressure distribution inside the battery. This uneven pressure will affect the battery's performance, especially during charging and discharging, and will further affect the battery's cycle performance. Utility Model Content

[0005] The purpose of this invention is to provide a limiting and smoothing structure and a vacuum pre-sealing device for soft-pack batteries to solve the problems existing in the prior art and to solve the problem of battery performance degradation caused by deformation and bending of the battery air bag under high vacuum conditions.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides a limiting and smoothing structure, including: a first smoothing drive structure, a second smoothing drive structure, and at least one smoothing component. The smoothing component includes a first limiting smoothing member and a second limiting smoothing member, which are disposed opposite to each other. The first smoothing drive structure is used to drive the first limiting smoothing member, and the second smoothing drive structure is used to drive the second limiting smoothing member. Under the action of the first smoothing drive structure and the second smoothing drive structure, the first limiting smoothing member and the second limiting smoothing member can move closer to or further away from each other.

[0008] In some specific solutions, at least two smoothing components are included, with the first limiting smoothing component and the second limiting smoothing component arranged in parallel and alternately.

[0009] In some specific embodiments, the power output end of the first smoothing drive structure is provided with a first limiting smoothing component, and adjacent first limiting smoothing components are connected by a first connecting structure; the power output end of the second smoothing drive structure is provided with a second limiting smoothing component, and adjacent second limiting smoothing components are connected by a second connecting structure.

[0010] In some specific solutions, the first limiting and smoothing member is provided with a first clearance groove for the passage of the second connecting structure, and the second limiting and smoothing member is provided with a second clearance groove for the passage of the first connecting structure.

[0011] In some specific designs, a guide rod is also included, which is slidably connected to the first limiting and smoothing member and the second limiting and smoothing member, respectively.

[0012] This utility model also provides a vacuum pre-sealing device for soft-pack batteries, including an upper shell, a lower shell, a vacuum structure, a pre-sealing head structure, a battery clamping structure, and a limiting and smoothing structure. The upper shell and the lower shell can be interlocked to form a pre-sealed cavity. The vacuum structure is connected to the pre-sealed cavity. The pre-sealing head structure is disposed on the upper shell. The limiting and smoothing structure and the battery clamping structure are disposed on the lower shell. The limiting and smoothing structure is located between the pre-sealing head structure and the battery clamping structure.

[0013] In some specific embodiments, the pre-sealing head structure includes a first head driving structure, a second head driving structure, and at least one head assembly. The head assembly includes a first head member and a second head member, which are disposed opposite to each other. The first head driving structure is used to drive the first head member, and the second head driving structure is used to drive the second head member. Under the action of the first head driving structure and the second head driving structure, the first head member and the second head member can move closer to or further away from each other.

[0014] In some specific embodiments, the battery clamping structure is mounted on a lifting structure, which can move the battery clamping structure closer to or further away from the limiting and smoothing structure. The battery clamping structure includes at least one battery clamping assembly, which includes a first clamping member and a second clamping member. The first clamping member and the second clamping member are disposed opposite to each other and are both threadedly connected to a screw. The distance between the first clamping member and the second clamping member can be adjusted by adjusting their positions on the screw.

[0015] In some specific embodiments, a temperature monitoring component is also provided on the upper housing to monitor the temperature of the pre-sealed head structure, and a vacuum gauge is provided on the upper housing or the lower housing to monitor the vacuum level of the pre-sealed cavity.

[0016] In some specific solutions, a snap-fit ​​drive structure is also included, wherein the power output end of the snap-fit ​​drive structure is connected to the upper housing, and the snap-fit ​​drive structure can drive the upper housing to snap into the lower housing.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] The first and second limiting and smoothing components of this invention are used to clamp the battery air bag. During the vacuum pre-sealing process of the soft-pack battery, these components constrain the battery air bag, correcting its position and ensuring it remains flat during vacuum pre-sealing. This prevents the battery air bag from deforming and bending under high vacuum conditions during the vacuum pre-sealing process, which could lead to uneven internal pressure distribution and affect battery performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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 these drawings without creative effort.

[0020] Figure 1 Axonometric view of the limiting and smoothing structure in some embodiments of this utility model Figure 1 ;

[0021] Figure 2 Axonometric view of the limiting and smoothing structure in some embodiments of this utility model Figure 2 ;

[0022] Figure 3 This is a front view of the limiting and smoothing structure in some embodiments of the present invention;

[0023] Figure 4 Main view of the vacuum pre-sealing equipment for soft-pack batteries in some embodiments of this utility model Figure 1 ;

[0024] Figure 5 Main view of the vacuum pre-sealing equipment for soft-pack batteries in some embodiments of this utility model Figure 2 ;

[0025] In the figure: 1-First smoothing drive structure, 2-Second smoothing drive structure, 3-First limiting smoothing component, 4-Second limiting smoothing component, 5-First connecting structure, 6-Second connecting structure, 7-First clearance groove, 8-Second clearance groove, 9-Guide rod, 10-Battery air bag, 11-First end cap drive structure, 12-Second end cap drive structure, 13-First end cap component, 14-Second end cap component, 15-Lifting structure, 16-First clamping component, 17-Second clamping component, 18-Temperature monitoring component, 19-Vacuum gauge, 20-Snapping drive structure, 21-Cover plate, 22-Fixing lock component, 23-Guide post, 24-Pre-sealed cavity. Detailed Implementation

[0026] 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.

[0027] The purpose of this invention is to provide a limiting and smoothing structure and a vacuum pre-sealing device for soft-pack batteries to solve the problems existing in the prior art and to solve the problem of battery performance degradation caused by deformation and bending of the battery air bag under high vacuum conditions.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figures 1 to 5As shown, this embodiment provides a limiting and smoothing structure, including: a first smoothing drive structure 1, a second smoothing drive structure 2, and at least one smoothing component. The smoothing component includes a first limiting smoothing member 3 and a second limiting smoothing member 4. The first limiting smoothing member 3 and the second limiting smoothing member 4 are disposed opposite to each other. The first smoothing drive structure 1 is used to drive the first limiting smoothing member 3, and the second smoothing drive structure 2 is used to drive the second limiting smoothing member 4. Under the action of the first smoothing drive structure 1 and the second smoothing drive structure 2, the first limiting smoothing member 3 and the second limiting smoothing member 4 can move closer to or further away from each other. In this embodiment, the first limiting and smoothing member 3 and the second limiting and smoothing member 4 are used to clamp the battery air bag 10. The first limiting and smoothing member 3 and the second limiting and smoothing member 4 constrain the battery air bag 10 during the vacuum pre-sealing process of the soft pack battery, thereby correcting the position of the battery air bag 10. This effectively avoids the deformation and bending of the battery air bag 10 under high vacuum (≤-50Kpa) conditions, which can effectively avoid the misalignment of the membrane shell caused by the bending of the battery air bag 10, thus preventing pre-sealing wrinkles, improving the pre-sealing effect, and further improving the product yield.

[0031] In some specific embodiments, the first smoothing drive structure 1 and the second smoothing drive structure 2 are structures capable of linear motion, such as cylinders, hydraulic cylinders, and electric push rods.

[0032] In some specific embodiments, at least two smoothing components are included, with the first limiting smoothing member 3 and the second limiting smoothing member 4 arranged in parallel and alternately.

[0033] In some specific embodiments, the power output end of the first smoothing drive structure 1 is provided with a first limiting smoothing member 3, and adjacent first limiting smoothing members 3 are connected by a first connecting structure 5, preferably a connecting rod; the power output end of the second smoothing drive structure 2 is provided with a second limiting smoothing member 4, and adjacent second limiting smoothing members 4 are connected by a second connecting structure 6, preferably a connecting rod; the first limiting smoothing member 3 is provided with a first clearance groove 7 for the passage of the second connecting structure 6, and the second limiting smoothing member 4 is provided with a second clearance groove 8 for the passage of the first connecting structure 5. When the first smoothing drive structure 1 drives each first limiting smoothing member 3 to move, because the second limiting smoothing member 4 is provided with a second clearance groove 8, there is no interference between the first limiting smoothing member 3 and the second limiting smoothing member 4. Similarly, the first clearance groove 7 and the second clearance groove 8 on the first limiting smoothing member 3 have the same function.

[0034] In some specific embodiments, a guide rod 9 is also included. There are at least two guide rods 9, and each guide rod 9 is arranged in parallel. The guide rod 9 is used to connect with the upper housing of the vacuum pre-sealing equipment for soft-pack batteries. The guide rod 9 is slidably connected with the first limiting and smoothing member 3 and the second limiting and smoothing member 4 respectively. When the first limiting and smoothing member 3 and the second limiting and smoothing member 4 approach or move away from each other, the guide rod 9 plays a guiding and positioning role.

[0035] In this embodiment, when it is necessary to flatten and limit the battery air bag 10, the first flattening drive structure 1 drives each first limiting flattening member 3 to move towards the corresponding second limiting flattening member 4. Simultaneously, the second flattening drive structure 2 drives each second limiting flattening member 4 to move towards the corresponding first limiting flattening member 3. The first limiting flattening member 3 and the second limiting flattening member 4 of each flattening assembly clamp the battery air bag 10, achieving flattening and limiting of the battery air bag 10. This ensures that the battery air bag 10 remains flat during vacuum pre-sealing of the pouch battery. During the vacuum pre-sealing process of the pouch battery, this avoids the problem of the battery air bag 10 easily deforming and bending under high vacuum conditions, leading to uneven internal pressure distribution and thus affecting battery performance.

[0036] Example 2

[0037] like Figures 1 to 5 As shown, this embodiment provides a vacuum pre-sealing device for a soft-pack battery, including an upper shell, a lower shell, a vacuum structure, a pre-sealing head structure, a battery clamping structure, and a limiting and smoothing structure as described in Embodiment 1. The upper shell and the lower shell can be interlocked to form a pre-sealing cavity 24. The vacuum structure is preferably a vacuum pump and is connected to the pre-sealing cavity 24. The pre-sealing head structure is disposed on the upper shell, and the limiting and smoothing structure and the battery clamping structure are disposed on the lower shell. The limiting and smoothing structure is located between the pre-sealing head structure and the battery clamping structure.

[0038] In some specific embodiments, the pre-sealing structure includes a first sealing head driving structure 11, a second sealing head driving structure 12, and at least one sealing head assembly. Both the first and second sealing head driving structures 11 and 12 are fixedly mounted on the upper housing. The sealing head assembly is located inside the upper housing. The sealing head assembly includes a first sealing head member 13 and a second sealing head member 14, which are arranged opposite to each other. Both the first and second sealing head members 13 and 14 have built-in heating structures for pre-sealing the battery gas bag 10. The first sealing head driving structure 11 drives the first sealing head member 13, and a transmission structure can be provided between the first sealing head driving structure 11 and the first sealing head member 13 to achieve transmission. The second sealing head driving structure 12 drives the second sealing head member 14, and the second sealing head driving structure 12 drives the second sealing head member 14. A transmission structure can be set between components 14 to achieve transmission. The specific transmission structure includes a cam and a laterally arranged guide rail. The power output end of the first end cap drive structure 11 is rotatably connected to the cam, which is rotatably connected to the first end cap component 13. The connection points between the cam and the first end cap drive structure 11 and the first end cap component 13 are located at different positions, and the first end cap component 13 is slidably connected to the guide rail. The power output end of the second end cap drive structure 12 is rotatably connected to the cam, which is rotatably connected to the second end cap component 14. The connection points between the cam and the second end cap drive structure 12 and the second end cap component 14 are located at different positions, and the second end cap component 14 is slidably connected to the guide rail. Under the action of the first end cap drive structure 11 and the second end cap drive structure 12, the first end cap component 13 and the second end cap component 14 can slide along the guide rail to move closer or further apart. The first end cap drive structure 11 and the second end cap drive structure 12 are structures capable of linear motion, such as cylinders, hydraulic cylinders, and electric push rods.

[0039] In some specific embodiments, the battery clamping structure is mounted on the lifting structure 15. Both the battery clamping structure and the lifting structure 15 are housed in the lower housing. The lifting structure 15 can move the battery clamping structure closer to or away from the limiting and smoothing structure, adjusting the lifting height of the soft-pack battery and making the pre-sealing position of the battery air bag 10 adjustable. The lifting structure 15 is a structure capable of linear motion, such as a cylinder, hydraulic cylinder, or electric push rod. The battery clamping structure is mounted on the lifting structure 15, which can move the battery clamping structure closer to or away from the limiting and smoothing structure. The battery clamping structure includes at least one battery clamping component, which includes a first clamping member 16 and a second clamping member 17. The first clamping member 16 and the second clamping member 17 are arranged opposite to each other and are both threadedly connected to a screw. By adjusting the position of the first clamping member 16 and the second clamping member 17 on the screw, the distance between the first clamping member 16 and the second clamping member 17 can be adjusted to accommodate batteries of different thicknesses. Alternatively, the battery clamping structure includes a clamping drive structure and at least one battery clamping assembly. The battery clamping assembly includes a first clamping member 16 and a second clamping member 17, which are arranged opposite to each other. The first clamping member 16 and the second clamping member 17 are used to clamp a pouch battery. The clamping drive structure is used to drive the first clamping member 16 and the second clamping member 17 to move closer or further apart. The clamping drive structure includes a motor and a lead screw. The power output end of the motor is connected to the lead screw. The lead screw is provided with at least one set of bidirectional threaded segments. The number of bidirectional threaded segments is the same as the number of battery clamping assemblies. The bidirectional threaded segments include forward threaded segments and reverse threaded segments with opposite directions of rotation. The first clamping member 16 is threadedly connected to the forward threaded segment, and the second clamping member 17 is threadedly connected to the reverse threaded segment. The motor drives the lead screw to rotate, and the lead screw drives the first clamping member 16 and the second clamping member 17 to move closer or further apart, thereby realizing the clamping and releasing of the pouch battery and accommodating batteries of different thicknesses.

[0040] In some specific embodiments, the smoothing component, the end cap component, and the battery clamping component are arranged from top to bottom, and the positions and numbers of the smoothing component, the end cap component, and the battery clamping component correspond one-to-one.

[0041] In some specific embodiments, the first smoothing drive structure 1 and the second smoothing drive structure 2 are both disposed on the upper housing, and the smoothing component is located inside the upper housing; the upper housing is also provided with a temperature monitoring component 18, which is used to monitor the temperature of the pre-sealing structure and transmit the temperature data monitored by the temperature monitoring component 18 to the controller, which controls the heating temperature of the heating structure in the first end cap 13 and the second end cap 14 according to the set temperature value; a vacuum gauge 19 is disposed on the upper housing or the lower housing, which is used to monitor the vacuum degree of the pre-sealing cavity 24 and transmit the vacuum data monitored by the vacuum gauge 19 to the controller, which controls the vacuum structure according to the set vacuum degree.

[0042] In some specific embodiments, a fastening drive structure 20 is also included. The power output end of the fastening drive structure 20 is connected to the cover plate 21. The cover plate 21 is connected to the upper housing through a fixing lock 22. By connecting the cover plate 21 to the upper housing, the risk of vacuum leakage in the pre-sealed cavity 24 can be reduced, and safety can be improved. The fastening drive structure 20 can drive the upper housing and the lower housing to fasten together. The fastening drive structure 20 is a structure that can achieve linear motion, such as a cylinder, hydraulic cylinder, or electric push rod. A sealing ring is provided on the lower surface of the upper housing or the upper surface of the lower housing for forming a sealed pre-sealed cavity 24 after the upper housing and the lower housing are fastened together.

[0043] In some specific embodiments, a guide post 23 is also included. The guide post 23 is slidably connected to the cover plate 21 and the upper housing. The guide post 23 is used to guide and position the upper housing when the fastening drive structure 20 drives the upper housing to move up and down.

[0044] In this embodiment, when the vacuum pre-sealing equipment for soft-pack batteries is working, the distance between the first clamping member 16 and the second clamping member 17 of the clamping assembly is adjusted according to the thickness of the soft-pack battery, and then the soft-pack battery is clamped between the first clamping member 16 and the second clamping member 17; the fastening drive structure 20 drives the upper shell and the lower shell to fasten together, and the upper shell and the lower shell form a sealed pre-sealed cavity 24; the lifting structure 15 drives the battery clamping structure to rise to the pre-sealing position, which corresponds to the position of the sealing head assembly of the battery air bag 10; the first smoothing drive structure 1 drives the first limiting smoothing member 3 to move toward the second limiting smoothing member 4, and at the same time, the second smoothing drive structure 2 drives the second limiting smoothing member 4 to move toward The battery pack 10 moves towards the first limiting smoothing member 3, and the first limiting smoothing member 3 and the second limiting smoothing member 4 of each smoothing component move closer together to clamp the battery air bag 10; then the vacuum structure is activated to evacuate the pre-sealed cavity 24; when the vacuum level reaches a preset value, the pre-sealing head structure is activated, and the first pre-sealing head driving structure drives the first sealing head member 13 to move toward the second sealing head member 14. At the same time, the second pre-sealing head driving structure drives the second sealing head member 14 to move toward the first sealing head member 13. The first sealing head member 13 and the second sealing head member 14 of each sealing head component move closer together, and the first sealing head member 13 and the second sealing head member 14 heat the battery air bag 10 to achieve pre-sealing; thus completing the vacuum pre-sealing process of the soft-pack battery.

[0045] A cylinder / servo air bag limiting and leveling mechanism is added to the pre-sealing station of the liquid injection machine, and this mechanism has an automatic opening and closing function. After the battery is transferred into the pre-sealing cavity, the pre-sealing cavity closes first, and then the air bag limiting and leveling mechanism automatically closes to correct and limit the position of the battery air bag 10. Then, high vacuum (≤-50KPa) is used to extract the residual gas inside the battery, and then the battery is sealed. Then the air bag limiting and leveling mechanism automatically opens, and finally the pre-sealing cavity 24 opens, and the product is transferred to the next station.

[0046] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A limiting and smoothing structure, characterized in that: include: The system comprises a first smoothing drive structure, a second smoothing drive structure, and at least one smoothing component. The smoothing component includes a first limiting smoothing member and a second limiting smoothing member, which are disposed opposite to each other. The first smoothing drive structure drives the first limiting smoothing member, and the second smoothing drive structure drives the second limiting smoothing member. Under the action of the first smoothing drive structure and the second smoothing drive structure, the first limiting smoothing member and the second limiting smoothing member can move closer to or further away from each other.

2. The limiting and smoothing structure according to claim 1, characterized in that: It includes at least two smoothing components, with the first limiting smoothing component and the second limiting smoothing component arranged in parallel and alternately.

3. The limiting and smoothing structure according to claim 1, characterized in that: The power output end of the first smoothing drive structure is provided with a first limiting smoothing member, and adjacent first limiting smoothing members are connected by a first connecting structure; the power output end of the second smoothing drive structure is provided with a second limiting smoothing member, and adjacent second limiting smoothing members are connected by a second connecting structure.

4. The limiting and smoothing structure according to claim 3, characterized in that: The first limiting and smoothing member is provided with a first clearance groove for the passage of the second connecting structure, and the second limiting and smoothing member is provided with a second clearance groove for the passage of the first connecting structure.

5. The limiting and smoothing structure according to claim 1, characterized in that: It also includes guide rods, which are slidably connected to the first limiting and smoothing member and the second limiting and smoothing member, respectively.

6. A vacuum pre-sealing device for soft-pack batteries, characterized in that: The device includes an upper housing, a lower housing, a vacuum structure, a pre-sealing head structure, a battery clamping structure, and a limiting and smoothing structure as described in any one of claims 1-5. The upper housing and the lower housing can be interlocked to form a pre-sealed cavity. The vacuum structure communicates with the pre-sealed cavity. The pre-sealing head structure is disposed on the upper housing. The limiting and smoothing structure and the battery clamping structure are disposed on the lower housing. The limiting and smoothing structure is located between the pre-sealing head structure and the battery clamping structure.

7. The vacuum pre-sealing equipment for soft-pack batteries according to claim 6, characterized in that: The pre-sealing head structure includes a first head driving structure, a second head driving structure, and at least one head assembly. The head assembly includes a first head member and a second head member, which are disposed opposite to each other. The first head driving structure drives the first head member, and the second head driving structure drives the second head member. Under the action of the first head driving structure and the second head driving structure, the first head member and the second head member can move closer to or further away from each other.

8. The vacuum pre-sealing equipment for soft-pack batteries according to claim 6, characterized in that: The battery clamping structure is mounted on the lifting structure, which can move the battery clamping structure closer to or further away from the limiting and smoothing structure. The battery clamping structure includes at least one battery clamping assembly, which includes a first clamping member and a second clamping member. The first clamping member and the second clamping member are arranged opposite to each other and are both threadedly connected to a screw. The distance between the first clamping member and the second clamping member can be adjusted by adjusting their positions on the screw.

9. The vacuum pre-sealing equipment for soft-pack batteries according to claim 6, characterized in that: The upper housing is also provided with a temperature monitoring component, which is used to monitor the temperature of the pre-sealed head structure. The upper housing or the lower housing is provided with a vacuum gauge, which is used to monitor the vacuum level of the pre-sealed cavity.

10. The vacuum pre-sealing equipment for soft-pack batteries according to claim 6, characterized in that: It also includes a fastening drive structure, the power output end of which is connected to the upper housing, and the fastening drive structure can drive the upper housing to fasten with the lower housing.

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