Vacuum adsorption device

Abstract

The utility model relates to the technical field of battery production, and discloses a vacuum adsorption device. The vacuum adsorption device comprises a first base, a vacuum suction assembly, a plurality of detection assemblies and a plurality of first adsorption parts. Wherein the first adsorption part is arranged on the first base and is communicated with the vacuum suction assembly; the first adsorption part is used for adsorbing the pole piece; the detection assembly is also arranged on the first base, and the detection assembly and the first adsorption part are located on the same surface; the detection assembly is used for detecting the number of pole pieces. In the working process of the vacuum adsorption device, the working state of the vacuum adsorption device can be accurately judged by comparing and analyzing the detection results of the plurality of detection assemblies, and the problem that the number of pole pieces is large or small can be found in time, so that the product percent of pass of batteries is improved, the use performance of the batteries is guaranteed, and the service life of the batteries is prolonged. And the risk of safety accidents of the battery is reduced.

Description

Technical Field

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

[0002] In the production of lithium-ion batteries, the stacking process is a crucial step that directly impacts battery quality. Simply put, the stacking process involves layering positive electrode sheets, negative electrode sheets, and a separator to form a battery cell. Vacuum adsorption devices can be used to transfer the electrode sheets in this process. However, during the transfer of electrode sheets from one station to another, the electrode sheets may detach from the surface of the vacuum adsorption device. Alternatively, the device may simultaneously pick up multiple electrode sheets. Therefore, the risk of producing cells with too many or too few electrode sheets is high, severely affecting product quality and performance. Utility Model Content

[0003] This invention provides a vacuum adsorption device to solve the problem in the prior art where the vacuum adsorption device operates under abnormal conditions, resulting in a higher risk of producing too many or too few battery cells.

[0004] This utility model provides a vacuum adsorption device, which includes a first base, a vacuum suction assembly, multiple detection assemblies, and multiple first adsorption sections; wherein:

[0005] The plurality of first adsorption portions are disposed on the first base, and the plurality of first adsorption portions are connected to the vacuum suction assembly; the plurality of first adsorption portions are used to adsorb the electrode sheet;

[0006] The plurality of detection components are also disposed on the first base, and the plurality of detection components and the plurality of first adsorption portions are located on the same surface; the plurality of detection components are used to detect the number of the electrode sheets.

[0007] The beneficial effects of the vacuum adsorption device provided in this embodiment of the invention are as follows:

[0008] During operation, the vacuum adsorption device can accurately determine its working status by comparing and analyzing the detection results of multiple detection components. This allows for timely detection of issues such as too many or too few electrode sheets, thereby improving the product qualification rate of the battery, ensuring its performance, and reducing the risk of battery safety accidents. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a vacuum adsorption device provided in an embodiment of this application;

[0010] Figure 2This is a schematic diagram of the adsorption of an electrode sheet provided in an embodiment of this application;

[0011] Figure 3 Another adsorption schematic diagram of the electrode provided in the embodiments of this application;

[0012] Figure 4 This is another structural schematic diagram of the vacuum adsorption device provided in the embodiments of this application;

[0013] Figure 5 This is another structural schematic diagram of the vacuum adsorption device provided in the embodiments of this application;

[0014] Figure 6 This is another structural schematic diagram of the vacuum adsorption device provided in the embodiments of this application.

[0015] Figure label:

[0016] 1-First base; 11-Main body; 110-Adsorption surface; 1101-First end corner; 1102-Second end corner;

[0017] 1103 - Third end corner; 1104 - First side; 1105 - Second side; 1106 - First center line;

[0018] 12-Protrusion; 2-Vacuum suction assembly; 3-First adsorption part; 4-Detection assembly; 5-Second base;

[0019] 6-Second adsorption section; 7-Electrode; 71-Material area; 72-Electrode tab. Detailed Implementation

[0020] The technical solutions in the exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this application. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of this application.

[0021] In the description of this application, unless otherwise expressly specified and limited, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more; and the term “and / or” includes any and all combinations of one or more of the associated listed items. In particular, references to “the / described” object or “an” object are also intended to indicate one of a possible plurality of such objects.

[0022] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Furthermore, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this application. It should also be understood that, in the context of an element or feature being connected to another element(s) "upper," "lower," "inner," or "outer," it can be directly connected to the other element(s) "upper," "lower," "inner," or "outer," or indirectly connected to the other element(s) "upper," "lower," "inner," or "outer" through an intermediate element.

[0024] To facilitate understanding of the technical solution provided in this application, the application scenario is first introduced below. This application relates to a vacuum adsorption device, which can be used to adsorb electrode sheets. The electrode sheet is a component of the battery cell, and includes a current collector and an active material layer, with the active material layer coated on the surface of the current collector. If the electrode sheet is a positive electrode sheet, the current collector can be made of aluminum, and the active material layer can be made of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. If the electrode sheet is a negative electrode sheet, the current collector can be made of copper, and the active material layer can be made of carbon or silicon, etc. In the above electrode sheet, the active material layer covers a portion of the current collector, and the portion of the current collector covered by the active material layer and the active material layer together constitute the material area of ​​the electrode sheet, while the portion of the current collector not covered by the active material layer constitutes the tab of the electrode sheet.

[0025] A battery cell comprises multiple positive and negative electrode sheets, which are alternately stacked, with a separator between adjacent positive and negative electrode sheets. The separator acts as an insulating layer to prevent short circuits inside the battery caused by contact between the positive and negative electrode sheets, and as a semi-permeable layer, it prevents larger molecules from passing through while allowing smaller charged ions to pass. In one battery cell manufacturing process, firstly, positive and negative electrode strips are cut to form positive and negative electrode sheets with predetermined shapes and sizes; then, the positive and negative electrode sheets are transferred to corresponding pre-positioning platforms; at the pre-positioning platforms, the positions of the positive and negative electrode sheets are corrected; then, the positive and negative electrode sheets are transferred to a lamination station; at the lamination station, the positive and negative electrode sheets are located on both sides of the separator, and the stacking jaws clamp the positive and negative electrode sheets and the separator, stacking them onto a stacking table. One end of the separator is fixed to the stacking table, and the other end is wound onto an unwinding roller. On the stacking stage, the separators are stacked in a Z-shape to separate the positive and negative electrodes.

[0026] In the aforementioned battery cell manufacturing process, the cut positive and negative electrode sheets can be conveyed to a pre-positioning platform via a conveyor belt. A vacuum adsorption device can pick up the electrode sheets from the surface of the conveyor belt and transfer them to the pre-positioning platform. Additionally, the vacuum adsorption device can also be used to pick up electrode sheets from the pre-positioning platform and transfer them to the lamination station.

[0027] In one scenario, during the transfer of electrode sheets from the pre-positioning platform to the lamination station by the vacuum adsorption device, the electrode sheets may detach from the surface of the vacuum adsorption device, preventing them from being properly stacked into the battery cell. In another scenario, if the electrode sheet does not detach from the vacuum adsorption device at the lamination station but returns to the pre-positioning platform with it, this will also prevent it from being properly stacked into the battery cell. In yet another scenario, when the vacuum adsorption device picks up two or more electrode sheets at once, these sheets will be stacked into the battery cell simultaneously. In these scenarios, the prepared battery cells may have excess or insufficient electrode sheets, affecting product performance and potentially leading to safety accidents.

[0028] In view of the above, the vacuum adsorption device provided in this application embodiment can detect the problem of too many or too few electrodes in a timely manner by real-time monitoring of the working status of the vacuum adsorption device during the electrode transfer process, thereby improving the product qualification rate of the battery, ensuring the performance of the battery, and reducing the risk of battery safety accidents.

[0029] Figure 1 This is a schematic diagram of a vacuum adsorption device provided in an embodiment of this application, as shown below. Figure 1As shown, in one embodiment, the vacuum adsorption device includes a first base 1, a vacuum suction assembly 2, and a plurality of first adsorption sections 3. The plurality of first adsorption sections 3 are connected to the vacuum suction assembly 2, and the plurality of first adsorption sections 3 are used to adsorb the electrode 7.

[0030] In one embodiment, the first base 1 can be a hollow structure. The first base 1 can reduce the weight of the vacuum adsorption device, and its interior can also accommodate a pipe. One end of the pipe is connected to the first adsorption part 3, and the other end is connected to the vacuum suction assembly 2, thereby connecting the first adsorption part 3 and the vacuum suction assembly 2.

[0031] When specifically configuring the first adsorption part 3, the first adsorption part 3 includes various structural forms. In one embodiment, the first adsorption part 3 is a through hole penetrating the wall of the first base 1, and the first adsorption part 3 is connected to the cavity of the first base 1.

[0032] In another embodiment, the first adsorption part 3 and the first base 1 are two different structural components. The first adsorption part 3 includes a suction cup with a central vent that communicates with the vacuum suction assembly 2. Specifically, the surface of the first base 1 is provided with a first groove, and the suction cup is located within the first groove. A connecting hole is provided at the bottom of the first groove, allowing the vent of the suction cup to communicate with the cavity of the first base 1. When adsorbing the electrode 7, there is a large contact area between the suction cup and the electrode 7, thereby improving the adsorption effect of the electrode 7. When preparing the suction cup, flexible materials such as rubber or silicone can be used to reduce the damage to the electrode 7 caused by the suction cup during adsorption.

[0033] In the specific configuration of the vacuum suction assembly 2, the vacuum suction assembly 2 may include a vacuum pump or a vacuum generator. The vacuum suction assembly 2 can create a negative pressure in the first adsorption part 3, thereby causing the electrode 7 to adhere tightly to the first adsorption part 3 under atmospheric pressure, or in other words, causing the first adsorption part 3 to adsorb the electrode 7. The vacuum suction assembly 2 can also release the negative pressure state of the first adsorption part 3, thereby causing the electrode 7 to detach from the first adsorption part 3.

[0034] Please continue to refer to this. Figure 1 The vacuum adsorption device also includes multiple detection components 4, which are disposed on the first base 1, and the multiple detection components 4 and the first adsorption part 3 are located on the same side of the first base 1. The multiple detection components 4 are used to detect the number of electrode sheets 7, and the measured number of electrode sheets 7 may be 0, 1, 2 or other values.

[0035] When installing the detection component 4, a second groove is provided on the surface of the first base 1, the detection component 4 is located in the second groove, and the detection component 4 does not protrude from the surface of the first base 1.

[0036] During the transfer of electrode 7 by the vacuum adsorption device, the aforementioned multiple detection components 4 operate simultaneously. Taking the transfer of electrode 7 between the pre-positioning platform and the stacking station as an example, during the process of the vacuum adsorption device transferring electrode 7 from the pre-positioning platform to the stacking station, it is correct for the vacuum adsorption device to adsorb one electrode 7; an incorrect state is when no electrode 7 is adsorbed or multiple electrode 7s are adsorbed. When all of the aforementioned multiple detection components 4 detect electrode 7, and the number of electrode 7 determined by the detection results of these multiple detection components 4 is one, stacking can proceed normally. Stacking can also proceed normally when some detection components 4 detect electrode 7, and the number of electrode 7 determined by the detection results of these detection components 4 is one, while other detection components 4 do not detect electrode 7. This phenomenon may be due to misalignment of electrode 7, and the position of electrode 7 can be corrected by the pre-positioning platform, so stacking can continue. When at least one detection component 4 detects electrode 7, and the number of electrode 7 determined by the detection results of the detection component 4 is multiple, an alarm can be triggered.

[0037] During the process of the vacuum adsorption device transferring the electrode 7 from the lamination station to the pre-positioning platform, the correct state is when the vacuum adsorption device does not adsorb any electrode 7; the incorrect state is when there is one electrode 7 or multiple electrode 7s. When none of the above-mentioned detection components 4 detect the electrode 7, the lamination process can proceed normally. When at least one detection component 4 detects the electrode 7, an alarm can be triggered.

[0038] During operation, the vacuum adsorption device can accurately determine its working status by comparing and analyzing the detection results of multiple detection components 4. This allows for timely detection of issues such as too many or too few electrode sheets, thereby improving the product qualification rate of the battery, ensuring its performance, and reducing the risk of battery safety accidents.

[0039] When specifically setting the detection component 4, the detection component 4 can include various types. In one embodiment, the detection component 4 can be an ultrasonic sensor. The ultrasonic sensor includes a transmitter and a receiver, and the transmitter and receiver can be integrated. The transmitter can emit ultrasonic waves, which are reflected back after encountering the electrode 7 during propagation, forming an echo, which is received by the receiver. The number of electrode 7 can be determined based on the delay time or frequency change of the echo signal received by the receiver. Specifically, when there are no electrode 7s on the surface of the vacuum adsorption device, the delay time of the echo signal received by the receiver is longer. When there are electrode 7s on the surface of the vacuum adsorption device, the delay time of the echo signal received by the receiver is shorter. Furthermore, when there are multiple electrode 7s, the receiver can receive multiple echo signals, and the number of echo signals is consistent with the number of electrode 7s.

[0040] In another embodiment, the detection component 4 can also be a proximity sensor. The proximity sensor utilizes an oscillator to generate an alternating magnetic field. When the object being detected (metal) approaches the magnetic field and reaches the sensing distance, eddy currents are generated within the object. These eddy currents absorb the energy of the oscillator, causing the oscillator's vibration to weaken or even stop. The changes in oscillator vibration and cessation are processed by a subsequent amplification circuit and converted into an electrical signal. This electrical signal allows the determination that the object being detected is near the proximity sensor. In practical applications, the proximity sensor can be used to detect whether the surface of the vacuum adsorption device has electrodes 7.

[0041] Please continue to refer to this. Figure 1 In one embodiment, the first base 1 includes a main body 11, and at least one protrusion 12 is respectively provided on both sides of the main body 11 along the first direction X. To clarify the arrangement of the main body 11 and the protrusions 12, the first direction X is defined with the state of the vacuum adsorption device adsorbing the electrode 7 under normal conditions as a reference state. The first direction X is substantially consistent with the arrangement direction of the material area 71 and the tab 72 of the electrode 7.

[0042] The protrusion 12 is located on the side of the main body 11. The dimension of the protrusion 12 along the first direction X is smaller than the dimension of the main body 11 along the first direction X, and the dimension of the protrusion 12 along the second direction Y is also smaller than the dimension of the main body 11 along the second direction Y. The second direction Y is perpendicular to the first direction X, and parallel to the plane containing the adsorption surface 110 of the main body 11. To clearly define the position of the adsorption surface 110 in the main body 11, taking the state where the electrode 7 is adsorbed in the vacuum adsorption device as a reference state, the surface of the main body 11 facing the electrode 7 is the adsorption surface 110, and the adsorption surface 110 is provided with a plurality of first adsorption portions 3.

[0043] like Figure 1 As shown, the main body 11 has multiple protrusions 12 on each side along the first direction X, and these protrusions 12 are spaced apart along the second direction Y. The gap between two adjacent protrusions 12 forms a clearance space, which is located at the end of the first base 1. At the lamination station, two vacuum adsorption devices place a positive electrode 7 and a negative electrode 7 on the upper and lower sides of the separator; then, the fingers of the stacking claws can be inserted into the clearance space at the end of the first base 1 of the two vacuum adsorption devices, thereby clamping the positive electrode 7, the separator, and the negative electrode 7. That is, during the stacking process, the clearance space at the end of the first base 1 can avoid the fingers of the stacking claws, so that the stacking claws can clamp the positive electrode 7, the separator, and the negative electrode 7.

[0044] When the first adsorption part 3 is arranged on the adsorption surface 110 of the main body 11, the first adsorption part 3 includes various arrangement methods. In one embodiment, the adsorption surface 110 has multiple end corners, and the first adsorption part 3 is distributed at each end corner. Specifically, when implementing the above embodiment, the adsorption surface 110 can be rectangular, and the adsorption surface 110 has four end corners, and the first adsorption part 3 is distributed at each end corner.

[0045] It should be noted that the aforementioned end corners are a portion of the adsorption surface 110. For example, each end corner is a sector-shaped region with its vertex as the center and radius R as the center. Optionally, 1cm ≤ R ≤ 10cm. Another example is that each end corner is a triangular region with two corresponding right-angled sides of length L. Optionally, 1cm ≤ L ≤ 10cm. The values ​​of R and L can be 2cm, 3.0cm, 4.0cm, 5cm, 6cm, 7cm, 8cm, 9cm, or other values, which are not listed here.

[0046] In another embodiment, the first adsorption portion 3 can be distributed not only at the corners of the adsorption surface 110, but also in other areas of the adsorption surface 110. For example, the first adsorption portion 3 can be distributed in other positions in the edge region of the adsorption surface 110, excluding the corners. As another example, the first adsorption portion 3 can also be distributed on the first center line 1106 of the adsorption surface 110. The first center line 1106 extends along the first direction X, and the adsorption surface 110 is symmetrically arranged about the first center line 1106.

[0047] In addition to accommodating the first adsorption part 3, the adsorption surface 110 of the main body 11 can also accommodate the detection component 4. Furthermore, the detection component 4 can be arranged in various ways. For example... Figure 1 As shown, in one embodiment, the adsorption surface 110 is rectangular and has a first end corner 1101 and a second end corner 1102. The first end corner 1101 and the second end corner 1102 are distributed along the diagonal of the adsorption surface 110, and detection components 4 are respectively arranged at the first end corner 1101 and the second end corner 1102. The detection component 4 arranged at the first end corner 1101 and the detection component 4 arranged at the second end corner 1102 have a first distance along the first direction X and a second distance along the second direction Y.

[0048] In the above arrangement, when the vacuum adsorption device picks up the electrode 7, but the electrode 7 is misaligned relative to the vacuum adsorption device, in most cases, the electrode 7 can still be detected by one or more of the detection components 4, thereby increasing the probability of the detection component 4 being detected and reducing the risk of the electrode 7 not being detected due to misalignment.

[0049] To better understand the effect of the above arrangement, we will take the example of the electrode 7 being misaligned relative to the vacuum adsorption device along the second direction Y. For ease of description, we will use Y1 to represent the positive direction of the second direction Y and Y2 to represent the negative direction of the second direction Y.

[0050] Figure 2 This is a schematic diagram of the adsorption of an electrode provided in an embodiment of this application, such as... Figure 2 As shown, when the electrode 7 shifts along the Y1 direction, the detection component 4 arranged at the first end corner 1101 may be exposed, while the detection component 4 arranged at the second end corner 1102 remains covered by the electrode 7. Therefore, the detection component 4 arranged at the second end corner 1102 can detect the electrode 7.

[0051] Figure 3 This is another adsorption schematic diagram of the electrode provided in the embodiments of this application, as shown below. Figure 3 As shown, when the electrode 7 shifts along the Y2 direction, the detection component 4 located at the second end corner 1102 may be exposed, while the detection component 4 located at the first end corner 1101 remains covered by the electrode 7. Therefore, the detection component 4 located at the first end corner 1101 can detect the electrode 7.

[0052] Of course, the above-mentioned effect will also occur when the electrode 7 is shifted along the positive or negative direction of the first direction X. This application will not elaborate further here.

[0053] Thus, by arranging the detection components 4 at the first end corner 1101 and the second end corner 1102 respectively, the probability of the electrode 7 being detected by the detection components 4 is increased, and the risk of the electrode 7 not being detected due to misalignment is reduced.

[0054] In addition, the first corner 1101 and the second corner 1102 are part of the adsorption surface 110. In addition to arranging the detection component 4, the first corner 1101 and the second corner 1102 can also be arranged with the first adsorption part 3.

[0055] Figure 4 Another structural schematic diagram of the vacuum adsorption device provided in the embodiments of this application, and Figure 1 Compared to the vacuum adsorption device shown, in this embodiment, in addition to the detection components 4 arranged at the first end corner 1101 and the second end corner 1102, the adsorption surface 110 also has a third end corner 1103, and the third end corner 1103 is also arranged with the detection components 4.

[0056] During application, the detection results of the detection component 4 arranged at the third end corner 1103 can be used as a supplement, and together with the detection results of the detection components 4 arranged at the first end corner 1101 and the second end corner 1102, the number of electrode sheets 7 can be determined, thereby improving the accuracy and reliability of the determined number of electrode sheets 7.

[0057] Figure 5 This is another structural schematic diagram of the vacuum adsorption device provided in the embodiments of this application, as shown below. Figure 5 As shown, in one embodiment, the adsorption surface 110 has a first side 1104, a second side 1105, and a first center line 1106 located between the first side 1104 and the second side 1105, wherein the first side 1104 and the second side 1105 are symmetrically distributed on both sides of the first center line 1106. The first center line 1106 extends along a first direction X, and at least one detection component 4 is distributed on the first center line 1106. It can be understood that the center of the orthographic projection of the detection component 4 onto the plane containing the adsorption surface 110 is located at the first center line 1106, or slightly offset from the first center line 1106.

[0058] In scenarios where the electrode 7 is misaligned along the second direction Y, when the displacement of the electrode 7 along the second direction Y is less than half the dimension of the main body 11 along the second direction Y, the detection component 4 located at the first center line 1106 can generally detect the electrode 7. In other words, even when the displacement of the electrode 7 along the second direction Y is small, the detection component 4 located at the first center line 1106 can detect the electrode 7.

[0059] Please continue to refer to this. Figure 5 In one embodiment, a plurality of detection components 4 are distributed along the first centerline 1106, and at least two of the plurality of detection components 4 are located on opposite sides of the center O of the adsorption surface 110 along the first direction X. In this way, in the scenario where the electrode 7 is misaligned along the first direction X, the probability of the electrode 7 being detected by the detection components 4 can be increased.

[0060] In the above embodiments, the end corners of the adsorption surface 110, such as the first end corner 1101 and the second end corner 1102, may or may not be equipped with the detection component 4.

[0061] Figure 6 This is another structural schematic diagram of the vacuum adsorption device provided in the embodiments of this application, as shown below. Figure 6 As shown, in one embodiment, a detection component 4 may be provided at the center O of the adsorption surface 110. In scenarios where the electrode 7 is misaligned along the first direction X or the first direction Y, the detection component 4 arranged at the center O of the adsorption surface 110 has a higher probability of detecting the electrode 7, reducing the risk that the electrode 7 will not be detected due to misalignment.

[0062] In one specific embodiment, a detection component 4 is respectively arranged at the first corner 1101 and the second corner 1102 of the adsorption surface 110. Furthermore, the centers of the orthographic projections of the detection components 4 arranged at the first corner 1101 and the second corner 1102 onto the plane containing the adsorption surface 110 can be distributed along the diagonal of the adsorption surface 110. Alternatively, the orthographic projections of the detection components 4 arranged at the first corner 1101 and the second corner 1102 onto the plane containing the adsorption surface 110 can be distributed on both sides of the diagonal of the adsorption surface 110.

[0063] When specifically setting the protrusion 12, the protrusion 12 may also be provided with a first adsorption part 3. During application, both the first adsorption part 3 located in the main body 11 and the first adsorption part 3 located in the protrusion 12 can be in a negative pressure state, thereby jointly adsorbing the electrode 7 and improving the adsorption effect of the electrode 7.

[0064] In one embodiment, both the first adsorption part 3 located in the main body 11 and the first adsorption part 3 located in the protrusion 12 include a suction cup, and the area of ​​the suction cup located in the main body 11 projected onto the plane of the adsorption surface 110 is greater than the area of ​​the suction cup located in the protrusion 12 projected onto the plane of the adsorption surface 110, thereby making the adsorption force generated by the suction cup located in the main body 11 on the electrode 7 greater than the adsorption force generated by the suction cup located in the protrusion 12 on the electrode 7.

[0065] This is because the main body 11 of the first base 1 corresponds to the middle part of the material area 71 of the electrode 7, and the protrusions 12 on both sides of the main body 11 correspond to the edge part of the material area 71. At the edge part of the material area 71, the active material layer coated on the surface of the current collector is prone to peeling off. Therefore, by reducing the area of ​​the suction cup located on the protrusion 12, the adsorption force generated by the suction cup can be reduced, thereby reducing the peeling off of the active material.

[0066] Please continue to refer to this. Figure 6 In one embodiment, the vacuum adsorption device further includes a second base 5 and a plurality of second adsorption sections 6. The second base 5 is fixedly connected to the first base 1, and the side of the second base 5 facing the electrode 7 is flush or substantially flush with the side of the first base 1 facing the electrode 7. The plurality of second adsorption sections 6 are connected to the vacuum suction assembly 2, and are used to adsorb the tabs 72 of the electrode 7. Correspondingly, the plurality of first adsorption sections 3 included in the first base 1 can be used to adsorb the material area 71 of the electrode 7.

[0067] Compared to the material area 71 of the electrode 7, the surface of the tab 72 has no active material. Therefore, the tab 72 is thinner and more prone to deformation. When the second adsorption part 6 is provided, the adsorption force generated by the second adsorption part 6 should be less than the adsorption force generated by the first adsorption part 3, thereby reducing the deformation of the tab 72 in the adsorption state and making the tab 72 relatively flat.

[0068] In view of the above, in one embodiment, the second base 5 is a hollow structure, and the second adsorption part 6 is a through hole penetrating the wall of the second base 5. Compared with the suction cup, the diameter of the through hole is smaller, and the adsorption force generated by the through hole on the tab 72 under negative pressure is also smaller, thereby reducing the deformation of the tab 72 and making the tab 72 more flat.

[0069] There are multiple second adsorption parts 6, which can be randomly arranged or arranged in an array on the surface of the second base 5.

[0070] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A vacuum adsorption device, characterized in that, It includes a first base, a vacuum suction assembly, multiple detection components, and multiple first adsorption units; The plurality of first adsorption portions are disposed on the first base, and the plurality of first adsorption portions are connected to the vacuum suction assembly; the plurality of first adsorption portions are used to adsorb the electrode sheet; The plurality of detection components are also disposed on the first base, and the plurality of detection components and the plurality of first adsorption portions are located on the same surface; the plurality of detection components are used to detect the number of the electrode sheets.

2. The vacuum adsorption device as described in claim 1, characterized in that, The first base includes a main body, and at least one protrusion is provided on each side of the main body along the first direction; The main body has an adsorption surface, and the adsorption surface is provided with a plurality of the detection components and a plurality of the first adsorption parts.

3. The vacuum adsorption device as described in claim 2, characterized in that, The adsorption surface is rectangular, and the adsorption surface has a first end corner and a second end corner; The first end corner and the second end corner are distributed along the diagonal of the adsorption surface, and the detection component is respectively provided on the first end corner and the second end corner.

4. The vacuum adsorption device as described in claim 3, characterized in that, The adsorption surface also has a third end corner, and the detection component is also provided on the third end corner.

5. The vacuum adsorption device according to any one of claims 2 to 4, characterized in that, The adsorption surface has a first side, a second side, and a first center line located between the first side and the second side; The first side and the second side are symmetrically distributed on opposite sides of the first center line; The first center line extends along the first direction, and at least one of the detection components is distributed along the first center line.

6. The vacuum adsorption device as described in claim 5, characterized in that, The first centerline is provided with a plurality of the detection components, and at least two of the detection components are distributed on opposite sides of the center of the adsorption surface along the first direction.

7. The vacuum adsorption device according to any one of claims 2 to 4, characterized in that, The adsorption surface has multiple end corners, and each end corner is provided with the first adsorption part.

8. The vacuum adsorption device according to any one of claims 2 to 4, characterized in that, Each of the bumps is provided with at least one of the first adsorption portions.

9. The vacuum adsorption device as described in claim 8, characterized in that, The first adsorption part includes a suction cup, the suction cup having an air hole at its center, and the air hole communicating with the vacuum suction assembly; The area of ​​the suction cup located on the main body, projected onto the plane of the adsorption surface, is greater than the area of ​​the suction cup located on the protrusion, projected onto the plane of the adsorption surface.

10. The vacuum adsorption apparatus according to any one of claims 1 to 4, characterized in that, The vacuum adsorption device also includes a second base and multiple second adsorption units; The plurality of second adsorption parts are disposed on the second base, the plurality of second adsorption parts are connected to the vacuum suction assembly, and the plurality of second adsorption parts are used to adsorb the tabs of the electrode sheet.

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