Vacuum adsorption device

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a vacuum adsorption device. The vacuum adsorption device comprises a suction cup body, one side face of the suction cup body is an adsorption face, a plurality of adsorption holes are distributed in the adsorption face to form a sheet body adsorption area used for adsorbing sheets, and the suction cup body is further provided with two or more vent holes. The sheet body adsorption area is equally divided into more than two subareas according to the number of the vent holes, each subarea is internally provided with one vent hole, the suction holes are equally divided into more than two groups according to the number of the vent holes, each group of suction holes are respectively arranged in each subarea, and each suction hole in each subarea is communicated with the vent hole in the subarea through at least two air passages; the negative pressure at the suction hole is prevented from being affected when a certain air channel is blocked, and the air channels of all the subareas are communicated with one another. According to the vacuum adsorption device, the balance of the vacuumizing degree of each subarea can be improved, and the adsorption stability of the whole pole piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a vacuum adsorption device. Background Technology

[0002] Electrode stacking is a crucial step in battery manufacturing. During the stacking process, a robotic arm drives a vacuum suction cup to pick up and transfer the electrodes. The vacuum suction cup has several suction holes; if the suction force at any of these holes decreases, the adsorption stability of the corresponding area of ​​the electrode will decrease, ultimately leading to an increased rate of defective electrode transfers. One existing vacuum adsorption device has several suction holes arrayed on its adsorption surface. A vent is located in the center of the adsorption area to connect to the suction mechanism. Several air channels are provided within the adsorption area, each communicating with the vent. Each suction hole is connected to the vent through two or more air channels. Because each suction hole is connected to the vent through at least two air channels, even if one air channel is blocked, the suction hole can still maintain vacuum by connecting to the vent through other air channels, preventing a decrease in adsorption force at the suction hole due to blockage of a single air channel. However, the adsorption device has the following problems: the adsorption device only has one vent in the central area of ​​the adsorption zone, which is connected to all the air channels. The adsorption zone area is relatively large. If some air channels are blocked in the area near the vent, the suction holes in the area far from the vent need to go through a longer air channel to connect with the vent. When vacuuming, the path of the negative pressure airflow is longer, resulting in a large difference in the vacuum level at the suction holes in different areas. This leads to a decrease in the overall adsorption stability of the electrode. Utility Model Content

[0003] The purpose of this invention is to provide a vacuum adsorption device to solve the problem that existing vacuum adsorption devices have large differences in the vacuum level at different areas of the suction hole after partial blockage of the air passage, which leads to a decrease in the overall adsorption stability of the electrode.

[0004] The present invention adopts the following technical solution:

[0005] A vacuum adsorption device includes a suction cup body, one side of which is an adsorption surface. A plurality of suction holes are distributed on the adsorption surface, forming a sheet adsorption area for adsorbing sheet material. The suction cup body is also provided with two or more vent holes for connecting to a vacuum generator. The sheet adsorption area is divided into two or more zones according to the number of vent holes, and each zone has one vent hole. The suction holes are divided into two or more groups according to the number of vent holes, and each group of suction holes is respectively set in each zone. Each suction hole in each zone is connected to the vent hole in that zone through at least two air passages to avoid affecting the negative pressure at the suction hole when a certain air passage is blocked. The air passages of each zone are interconnected.

[0006] Beneficial Effects: This utility model is a pioneering invention. It involves setting two or more ventilation holes on the suction cup body, dividing the relatively large adsorption area of ​​the electrode sheet into two or more equal zones based on the number of ventilation holes. Each zone contains one ventilation hole, and the suction holes are also divided into two or more groups based on the number of ventilation holes, with each group of suction holes located within its respective zone. Each suction hole in each zone is connected to the ventilation holes in that zone through at least two air passages. This ensures that if one air passage connected to a suction hole in a zone becomes blocked, the suction hole can still connect to the ventilation holes in that zone through other air passages, preventing a blockage in one air passage from affecting the negative pressure at the suction hole. The air passages in each zone are interconnected to ensure that the negative pressure generated in each zone is comparable. Each zone contains one ventilation hole. Because the area of ​​each zone is small, even if some air passages become blocked, causing the airflow to detour and lengthen its path, the difference in vacuum level between the suction hole and other suction holes will be significantly reduced, thereby improving the uniformity of vacuum level in each zone and enhancing the overall adsorption stability of the electrode sheet. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of an embodiment of the vacuum adsorption device of this utility model;

[0008] Figure 2 This is a front view of an embodiment of the vacuum adsorption device of this utility model;

[0009] Figure 3 This is a rear view of an embodiment of the vacuum adsorption device of this utility model;

[0010] Figure 4 This is a structural diagram of the internal air passage arrangement of an embodiment of the vacuum adsorption device of this utility model;

[0011] In the diagram: 1. Suction cup body; 2. Sheet adsorption area; 2-1. Partition; 3. Electrode adsorption area; 4. Vent hole; 5. Air passage; 6. Suction hole; 7. Plug. Detailed Implementation

[0012] The vacuum adsorption device provided by this invention mainly addresses the problem of significant differences in vacuum levels at different air inlets in existing vacuum adsorption devices after partial airway blockage, leading to a decrease in the overall adsorption stability of the electrode. The basic inventive concept of this invention is as follows: a large adsorption area is divided into multiple smaller adsorption zones, with interconnected airways in each zone. Each smaller zone has a vent, and each suction port within a smaller zone is connected to the vent through at least two airways. This way, when partial airway blockage occurs in a smaller adsorption zone, the suction ports connected to that airway can still connect to the vent through other airways. Because the area of ​​each smaller adsorption zone is small, even if partial airway blockage causes the airflow to detour and lengthen its path, the difference in vacuum levels between the suction ports and other ports will be significantly reduced. This improves the uniformity of vacuum levels across zones, enhancing the overall adsorption stability of the electrode. Even with partial airway blockage, the overall adsorption stability of the electrode can still be guaranteed.

[0013] Based on the above inventive concept, the embodiments of this utility model are described in detail below.

[0014] like Figure 1-4 As shown, the vacuum adsorption device of this utility model includes a suction cup body 1. One side of the suction cup body 1 is an adsorption surface, and several suction holes 6 are distributed on the adsorption surface to form an adsorption area. Suction holes 6 are used to install suction nozzles. The suction cup body 1 is provided with a sheet adsorption area 2 and an electrode tab adsorption area 3. The sheet adsorption area 2 is rectangular and is used to adsorb the sheet portion of the electrode. The electrode tab adsorption area 3 is located outside the sheet adsorption area 2 and is used to adsorb the electrode tab portion of the electrode. On the other side of the suction cup body 1 opposite to the adsorption surface, corresponding to the sheet adsorption area 2, two vent holes 4 are provided. The vent holes 4 are used to connect a vacuum generator. Figure 4As shown, the suction cup body 1 has several air channels 5 inside the area corresponding to the adsorption area 2 of the sheet. These air channels 5 are formed by drilling holes inside the suction cup body 1, and after all air channels 5 are formed, the ports connecting to the outside of the air channels 5 are sealed with plugs 7. The adsorption area 2 of the sheet is divided into two equal sections 2-1 along its length, with its central axis as the bisector. Each section 2-1 has a vent 4. The suction holes 6 are divided into two groups, with each group of suction holes 6 located in one of the two sections 2-1. Each suction hole 6 in each section 2-1 is connected to the vent 4 in that section 2-1 through at least two air channels 5. Each suction hole 6 has at least two air channels 5 connecting to the vent 4, increasing the path from the suction hole 6 to the vent 4. This prevents the negative pressure at the suction hole 6 from being affected when one air channel 5 is blocked, reducing the risk of decreased adsorption force at the suction hole 6 due to blockage of one air channel 5. Meanwhile, each suction hole 6 in each zone 2-1 is connected to a vent hole 4 in another zone 2-1 through at least two air passages 5. If an air passage 5 becomes blocked, the suction hole 6 can still connect to the vent hole 4 in the other zone 2-1 through other air passages 5, further reducing the risk of decreased adsorption force at the suction hole 6 due to air passage blockage. The air passages 5 of the two zones 2-1 are connected to ensure that the negative pressure generated in each zone 2-1 is comparable. Because the area of ​​zone 2-1 is small, even if some air passages 5 become blocked, causing the airflow to detour and lengthen its path, the difference in vacuum level at that suction hole 6 compared to other suction holes 6 will be significantly reduced, thereby improving the uniformity of vacuum level in each zone 2-1 and enhancing the overall adsorption stability of the electrode. Even if some air passages 5 become blocked, the overall adsorption stability of the electrode can still be guaranteed.

[0015] In a preferred embodiment, the air passages 5 of the two partitions 2-1 are symmetrically arranged about the central axis of the adsorption zone 2 of the electrode. This ensures that when the two partitions 2-1 are evacuated through the two vents 4, the degree of vacuum in both partitions 2-1 is as similar as possible, resulting in high consistency and avoiding a decrease in the adsorption stability of the electrode due to inconsistent vacuum levels in different partitions 2-1. The vents 4 of the two partitions 2-1 are also symmetrically arranged about the central axis of the adsorption zone 2, ensuring that the negative pressure of the air passages 5 at symmetrical positions in the two partitions 2-1 is similar. The suction holes 6 within the two partitions 2-1 are also symmetrically arranged about the central axis of the adsorption zone 2, so that the adsorption positions of the suction holes 6 on the electrode are symmetrical about the central axis of the electrode, further improving the overall adsorption stability of the electrode. Preferably, each suction hole 6 in each partition 2-1 is located at the intersection of air passages 5 to maximize the number of air passages 5 connected to each suction hole 6, thereby increasing the number of air passages 5 connecting each suction hole 6 to the vent 4 and minimizing the impact of partial blockage of air passages 5 on the suction force at the suction hole 6. The vents 4 of the two partitions 2-1 are located at the edges of the two partitions 2-1 respectively. The purpose of this arrangement is twofold: firstly, to facilitate the connection of the two vents 4 to the vacuum generator; and secondly, to leave ample space in the middle of the suction cup body 1 to facilitate the connection between the adsorption device and the robotic arm.

[0016] Specifically, such as Figure 2 As shown, the adsorption area 2 of the sheet is rectangular. A suction hole 6 is located at each of the four corners of the adsorption area 2, and four suction holes 6 are located in the central area. The line connecting the four suction holes 6 forms a square, meaning that the four suction holes 6 in the central area are evenly distributed on the same circumcircle. Two of the four suction holes 6 are located at the edge of the long side of the adsorption area 2 and at the middle of the length direction of the adsorption area 2, while the other two are located at the middle of the width direction of the adsorption area 2. Overall, suction holes 6 are provided at both the corners and the center of the adsorption area 2. All suction holes 6 are evenly distributed in the adsorption area 2, ensuring balanced adsorption at the edges and the central area of ​​the sheet, further improving the overall adsorption stability of the electrode sheet.

[0017] As shown in the diagram, in all the airways 5 where each suction hole 6 connects to the vent 4 of its respective partition 2-1, at least one airway 5 has another suction hole 6. This design simplifies the number of airways 5 and allows multiple suction holes 6 to connect without passing through the vent 4, resulting in shorter connection paths and higher efficiency. Furthermore, if an airway 5 directly connecting a suction hole 6 to the vent 4 becomes blocked, it can still connect to an adjacent suction hole 6 through another airway 5 with a different suction hole 6, thus ensuring stable adsorption. Additionally, the straight design of the airways 5 reduces the probability of blockage and ensures smoother airflow compared to curved airways 5.

[0018] Preferably, the diameter of the vent 4 is larger than the diameter of the airway 5, firstly to ensure vacuuming efficiency, and secondly to prevent the vent 4 from becoming clogged. The diameter of the suction hole 6 is smaller than the diameter of the airway 5, which is beneficial for the negative pressure airflow to form a stable negative pressure adsorption force at the suction hole 6.

[0019] like Figure 3-4 As shown, the tab adsorption area 3 is located outside the plate adsorption area 2. The suction cup body 1 has an independent air channel 5 within the tab adsorption area 3 and a vent hole 4 connected to it for connecting to a vacuum generator. The outer end of the air channel 5 extends to the outer surface of the suction cup body 1, forming the vent hole 4 of the tab adsorption area 3. The air channel 5 adopts a straight design. Suction holes 6 are provided on the adsorption surface of the tab adsorption area 3, and the suction holes 6 are connected to the vent hole 4 of the tab adsorption area 3 through the air channel 5. Because the area of ​​the tab adsorption area 3 is relatively small, two suction holes 6 are provided on the adsorption surface of the tab adsorption area 3, and the design of the air channel 5 is relatively simple. Because the thickness of the electrode body and the tab part are different, the required adsorption force is different during adsorption. The suction cup body 1 is divided into a body adsorption area 2 and a tab adsorption area 3. The body adsorption area 2 is used to adsorb the body part of the electrode, and the tab adsorption area 3 is used to adsorb the tab part of the electrode. The air passages 5 of the body adsorption area 2 and the tab adsorption area 3 are independent of each other and are respectively connected to a vacuum generator. The vacuum pressure can be set according to the required adsorption force of different areas, so that the negative pressure generated by the tab adsorption area 3 and the body adsorption area 2 are independent of each other, further improving the overall adsorption stability of the electrode.

[0020] Depending on the structure of the electrode to be adsorbed, four tab adsorption regions 3 are provided in total. Two of them are located on the same side of the length direction of the adsorption region 2 of the sheet body, and are used to adsorb one side of the electrode tab. The other two are located on the other side of the length direction of the adsorption region 2 of the sheet body, and are used to adsorb the other side of the electrode tab. The two tab adsorption regions 3 on the same side are arranged at intervals in the width direction of the adsorption region 2 of the sheet body, and are used to adsorb at different positions in the width direction of the same tab, so as to increase the adsorption area and improve the adsorption stability. Of course, in other embodiments, there can also be two tab adsorption regions 3, located on both sides of the length direction of the adsorption region 2 of the sheet body. The tab adsorption regions 3 can adsorb in the middle area in the width direction of the tab, or the area of ​​the tab adsorption region 3 can be close to the area of ​​the tab, adsorbing the entire area of ​​the tab.

[0021] Of course, this utility model is not limited to the embodiments described above.

[0022] For example, in another embodiment, the number of equal divisions of the adsorption area of ​​the tablet can be adjusted according to actual needs and is not strictly required. The adsorption area of ​​the tablet can be divided into three, four or more partitions, so that the air channels of all partitions are connected. A ventilation hole is set in each partition, and the suction holes are also divided into multiple groups according to the number of ventilation holes. Each group of suction holes is set in each partition, and each suction hole in each partition is connected to the ventilation hole in that partition through at least two air channels.

[0023] For example, in another embodiment, the sheet adsorption area is divided into two equal zones. The air passages in the two zones may not be symmetrically arranged about the central axis of the sheet adsorption area, and the air passage arrangements in the two zones may not be exactly the same. Similarly, the vents in the two zones may not be symmetrically arranged about the central axis of the sheet adsorption area. For example, the vents in the two zones may be located at the same position in the same direction in both zones, such as in the upper left. Alternatively, based on the different flow channel arrangements in the two zones, the vents in the two zones may be centrally symmetrical about the center point of the sheet adsorption area. The suction holes in the two zones may also not be symmetrically arranged about the central axis of the sheet adsorption area. The number of suction holes in the two zones may differ, and their arrangement or layout may also differ, allowing for flexible adjustments.

[0024] For example, in another embodiment, the vents of each partition can be set at a distance from the edge of the two partitions, or at a location near the center of the two partitions, as long as they can avoid the connection location of the vacuum generator and prevent interference with the connection of the vacuum generator.

[0025] For example, in another embodiment, some suction holes can be set at the airway intersection, and the remaining suction holes can be set on the airway at positions offset from the airway intersection, with the spacing between two adjacent suction holes adjusted according to actual needs.

[0026] For example, in another embodiment, the arrangement of all the suction holes in the adsorption area of ​​the sheet can also be arranged without dividing the corner area and the central area. For example, all the suction holes can be arranged in a matrix. The arrangement of the suction holes can be flexible and varied, and there is no limitation here.

[0027] For example, in another embodiment, the diameter of the vent hole can be equal to the diameter of the airway, and the diameter of the suction hole can also be equal to the diameter of the airway.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A vacuum adsorption device, characterized in that: The suction cup body (1) includes a suction cup body (1) with one side of the suction cup body (1) as the adsorption surface. Several suction holes (6) are distributed on the adsorption surface, and the area where the suction holes (6) are distributed forms a sheet adsorption area (2) for adsorbing sheet material. The suction cup body (1) is also provided with two or more ventilation holes (4) for connecting to a vacuum generator. The sheet adsorption area (2) is divided into two or more partitions (2-1) according to the number of ventilation holes (4), and each partition (2-1) is provided with a ventilation hole (4). The suction holes (6) are divided into two or more groups according to the number of ventilation holes (4), and each group of suction holes (6) is set in each partition (2-1). Each suction hole (6) in each partition (2-1) is connected to the ventilation hole (4) in that partition (2-1) through at least two air passages (5) to avoid affecting the negative pressure at the suction hole (6) when a certain air passage (5) is blocked. The air passages (5) of each partition (2-1) are interconnected.

2. The vacuum adsorption device according to claim 1, characterized in that: The adsorption area (2) of the sheet is divided into two equal parts (2-1) with its central axis as the dividing line. The airways (5) of the two parts (2-1) are arranged symmetrically about the central axis of the adsorption area (2).

3. The vacuum adsorption device according to claim 2, characterized in that: The ventilation holes (4) of the two partitions (2-1) are arranged symmetrically about the central axis of the adsorption zone (2) of the sheet.

4. The vacuum adsorption device according to claim 2, characterized in that: The suction holes (6) in the two partitions (2-1) are arranged symmetrically about the central axis of the adsorption area (2) of the sheet.

5. The vacuum adsorption device according to any one of claims 1-4, characterized in that: The ventilation holes (4) of each partition (2-1) are located at the edge of each partition (2-1).

6. The vacuum adsorption device according to any one of claims 1-4, characterized in that: Each suction hole (6) in each partition (2-1) is connected to the ventilation hole (4) in another partition (2-1) through at least two air passages (5) to avoid affecting the negative pressure at the suction hole (6) when all the air passages (5) connecting each suction hole (6) to the ventilation hole (4) in its partition (2-1) are blocked.

7. The vacuum adsorption device according to any one of claims 1-4, characterized in that: Each suction hole (6) in each partition (2-1) is located at the intersection of the airway (5).

8. The vacuum adsorption device according to any one of claims 1-4, characterized in that: The adsorption area (2) of the sheet is rectangular. The four corners of the rectangular adsorption area (2) are provided with the adsorption holes (6). There are two or more adsorption holes (6) evenly distributed in the middle area of ​​the rectangular adsorption area (2) so that all the adsorption holes (6) are evenly arranged in the adsorption area (2).

9. The vacuum adsorption device according to any one of claims 1-4, characterized in that: In all the air passages (5) where each suction hole (6) is connected to the vent (4) of its respective partition (2-1), at least one air passage (5) is provided with another suction hole (6).

10. The vacuum adsorption device according to any one of claims 1-4, characterized in that: The diameter of the vent (4) is larger than the diameter of the airway (5).

11. The vacuum adsorption device according to any one of claims 1-4, characterized in that: The diameter of the suction hole (6) is smaller than the diameter of the airway (5).

12. The vacuum adsorption device according to any one of claims 1-4, characterized in that: The suction cup body (1) is also provided with a tab adsorption area (3) for adsorbing tabs. The tab adsorption area (3) is located outside the sheet adsorption area (2). One side of the tab adsorption area (3) is an adsorption surface. A suction hole (6) is provided on the adsorption surface. The suction cup body (1) is provided with an independent air channel (5) and a ventilation hole (4) for connecting a vacuum generator connected to the tab adsorption area (3). The suction hole (6) of the tab adsorption area (3) is connected to the ventilation hole (4) of the tab adsorption area (3) through the air channel (5) so that the negative pressure generated by the tab adsorption area (3) and the sheet adsorption area (2) are independent of each other.

13. The vacuum adsorption device according to claim 12, characterized in that: The electrode adsorption area (3) is provided with four, two of which are located on the same side of the sheet adsorption area (2) and are used to adsorb one side of the electrode tab, and the other two are located on the opposite side of the sheet adsorption area (2) and are used to adsorb the other side of the electrode tab.

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