Battery rubberizing device, battery rubberizing control method, and battery production system

Abstract

This application relates to a battery adhesive application apparatus, a battery adhesive application control method, and a battery production system. The battery adhesive application apparatus incorporates an extruder. During the adhesive application process, the extruder bends the membrane end located on the side of the separator along the direction towards the second surface, thus pre-existing an anti-folding force on the membrane end along the direction towards the first surface. In this way, when the adhesive application assembly applies the adhesive from the side of the electrode assembly to the first surface, the bent membrane end effectively resists at least part of the folding force generated by the adhesive application. This design effectively reduces the probability of defects such as separator folding and exposed electrode sheets, thereby improving production yield.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to battery adhesive application apparatus, battery adhesive application control method, and battery manufacturing system. Background Technology

[0002] In the battery manufacturing process, adhesive tape is typically used to bind the electrode components to achieve shaping and stability. However, due to the structural design limitations of traditional battery adhesive bonding equipment, defects such as separator folding and exposed electrode sheets are prone to occur during the bonding process, making it difficult to improve production yield. Summary of the Invention

[0003] Therefore, it is necessary to provide a battery adhesive bonding device, a battery adhesive bonding control method, and a battery production system to reduce the probability of defects such as separator folding and exposed electrode sheets, which is conducive to improving production yield.

[0004] In a first aspect, this application provides a battery adhesive applicator, comprising: an adhesive applicator configured to apply adhesive tape from a side of an electrode assembly to a first surface of the electrode assembly, wherein the electrode assembly includes a first surface and a second surface distributed along its own thickness direction, and a side surface located between the first surface and the second surface; the electrode assembly includes a separator having a membrane end located at the side surface; and an extruder configured to at least partially press against the membrane end of the separator located at the side surface, so that the membrane end of the separator bends along the thickness direction of the electrode assembly and toward the second surface.

[0005] The aforementioned battery adhesive applicator incorporates an extruder. During the adhesive application process, the extruder bends the membrane end located on the side of the separator towards the second surface, thus pre-existing anti-folding force on the membrane end towards the first surface. This ensures that when the adhesive application assembly applies the adhesive from the side of the electrode assembly to the first surface, the bent membrane end effectively resists at least part of the folding force generated by the adhesive application. This design effectively reduces the probability of defects such as separator folding and exposed electrode sheets, thereby improving production yield.

[0006] In some embodiments, the extruder includes a first pressing surface and a second pressing surface. The first pressing surface is configured to press against a first surface, and the second pressing surface is used to press against the membrane end of the diaphragm, causing the membrane end to bend along the thickness direction of the electrode assembly and toward the second surface. This design, introducing the first and second pressing surfaces, allows the membrane end of the diaphragm to bend and the entire electrode assembly to be effectively shaped during the adhesive application process, effectively improving the stability of the adhesive application, thereby improving the adhesive application effect and yield.

[0007] In some embodiments, the second pressing surface is inclined or curved relative to the first pressing surface, so that at least a portion of the second pressing surface is closer to the adhesive application position of the battery adhesive applicator relative to the first pressing surface. This design allows the second pressing surface to press the membrane end of the separator relatively deeper, causing the membrane end of the separator to bend in the direction toward the second surface, thereby reducing the probability of the separator folding during the adhesive application process and improving the adhesive application effect and yield.

[0008] In some embodiments, the second pressing surface is inclined relative to the first pressing surface, and the angle between them is an obtuse angle. This design facilitates the exposure of the second pressing surface, making it easier for the second pressing surface to press against the membrane end of the diaphragm, improving operational convenience, and thus contributing to improved adhesive application effect and yield.

[0009] In some embodiments, the angle between the second pressing surface and the first pressing surface is denoted as θ, where 120°≤θ≤150°. This design controls the angle between the second pressing surface and the first pressing surface to be between 120° and 150°, which can effectively improve the compatibility with electrode assemblies of different specifications; at the same time, it can also improve the bending effect of the membrane end of the diaphragm, thereby improving the adhesive application effect and yield.

[0010] In some embodiments, the extruder further includes a transition surface connecting the first pressing surface and the second pressing surface, and the transition surface is configured as an arc-shaped concave surface. This design, by introducing an arc-shaped concave transition surface, can effectively reduce the probability of the diaphragm being damaged by pressure, improve the structural stability of the electrode assembly during the adhesive application process, thereby helping to improve the adhesive application effect and yield.

[0011] In some embodiments, the end of the second pressing surface away from the first pressing surface includes a rounded corner. This design, with a rounded corner at one end of the second pressing surface, reduces the likelihood of interference with the edge structure of the electrode assembly, thereby reducing the risk of edge damage to the electrode assembly and improving the adhesive application effect and yield.

[0012] In some embodiments, the battery bonding device further includes a mounting base, on which an extruder is disposed. The extruder is positionally adjustable on the mounting base along a preset direction, wherein the preset direction is the direction in which the first pressing surface and the second pressing surface are sequentially distributed. This design allows adjustment of the dimension of the second pressing surface extending beyond the electrode assembly, enabling the second pressing surface to better press against the membrane end of the separator. This allows the pressing component to adapt to the process requirements of electrode assemblies of different specifications and different bonding positions, thereby improving the versatility and process adaptability of the device.

[0013] In some embodiments, one of the mounting base and the extruder is provided with an adjustment groove extending in a preset direction, and the other is provided with a fixing member. The fixing member passes through the adjustment groove and can be moved and adjusted in the preset direction. This design facilitates the adjustment of the position of the extruder through the adjustment groove and the fixing member, thereby improving the convenience of the extruder adjustment operation.

[0014] In some embodiments, the extruder has a plurality of scale lines, which are distributed sequentially along a preset direction. This design, by introducing scale lines, facilitates quick and accurate adjustment of the extruder, improving adjustment efficiency and precision.

[0015] In some embodiments, the number of extruders includes multiple extruders, with an adhesive application gap formed between two adjacent extruders. The adhesive application gap is configured for the adhesive application assembly to perform the adhesive application operation. This design, by introducing multiple extruders, increases the number of stress points on the membrane end of the diaphragm, making the membrane end of the diaphragm located in the adhesive application gap easier to bend. This effectively reduces the probability of defects such as diaphragm folding and exposed electrode sheets, improving the adhesive application effect and yield.

[0016] In some embodiments, the inner wall of the adhesive application gap is configured to have a single-sided spacing D1 between itself and the adhesive tape located within it, wherein 0 ≤ D1 ≤ 20 mm. This design controls the single-sided spacing to within 20 mm, ensuring sufficient space for effective adhesive application while controlling the distance between the extruder and the desired bonding location. This allows the pressure applied by the extruder to be effectively transmitted to the membrane end of the diaphragm at the bonding location, improving bending performance and thus enhancing adhesive application quality and yield.

[0017] In some embodiments, the battery applicator further includes a drive assembly for driving the extruder towards or away from the applicator's application position. This design, with the introduction of the drive assembly, enables automatic control of the extruder, thus improving the automation of the applicator operation.

[0018] Secondly, this application provides a battery adhesive application control method, employing any of the battery adhesive application devices described above. The method includes the following steps: controlling at least a portion of the extruder to press against the membrane end of the separator located on the side of the electrode assembly, so that the membrane end of the separator bends along the thickness direction of the electrode assembly and toward the second surface; controlling the adhesive application assembly to apply adhesive tape at least from the side of the electrode assembly to the first surface of the electrode assembly on one side of the extruder, wherein a portion of the adhesive tape is adhered to the membrane end. This design can effectively reduce the probability of defects such as separator folding and exposed electrode sheets, which is beneficial to improving production yield.

[0019] In some embodiments, in the step of controlling the extruder to at least partially press against the membrane end of the diaphragm located on the side of the electrode assembly, the maximum distance between the bent membrane end and the unbent portion of the diaphragm on the first surface in the thickness direction of the electrode assembly is denoted as D2, where 0 mm < D2 ≤ 5 mm. This design controls the downward displacement of the membrane end of the diaphragm within the range of 0 mm to 5 mm, facilitating effective anti-folding force on the diaphragm and reducing the probability of folding and exposed electrode defects. Simultaneously, it reduces the likelihood of the diaphragm directly adhering to the side of the electrode assembly due to excessive bending, improving the adhesive application effect and yield.

[0020] In some embodiments, the maximum spacing D2 also satisfies the condition that 1mm ≤ D2 ≤ 3mm. With this design, the downward displacement of the membrane end of the diaphragm can be further controlled between 1mm and 3mm, which can effectively improve the adhesive application effect and yield.

[0021] In some embodiments, the step of controlling at least a portion of the extruder to press against the membrane end of the diaphragm located on the side of the electrode assembly includes: controlling a first pressing surface of the extruder to press against a first surface of the electrode assembly; controlling a second pressing surface of the extruder to extend beyond the membrane end of the diaphragm at an end away from the first pressing surface, and pressing the second pressing surface against the membrane end of the diaphragm, wherein the second pressing surface is inclined relative to the first pressing surface. This design, introducing the first and second pressing surfaces, allows the membrane end of the diaphragm to bend and the entire electrode assembly to be effectively shaped during adhesive application, effectively improving the stability of adhesive application, thereby improving the adhesive application effect and yield.

[0022] In some embodiments, the step of controlling the adhesive application assembly to apply tape from at least the side of the electrode assembly to a first surface of the electrode assembly on one side of the extruder includes: controlling the adhesive application assembly to adhere the tape to a second surface of the electrode assembly; controlling the adhesive application assembly to move outside the side of the electrode assembly; controlling the adhesive application assembly to move along the thickness direction of the electrode assembly and toward the first surface, such that the tape is adhered to the side of the electrode assembly; and controlling the adhesive application assembly to move onto the first surface of the electrode assembly, such that the tape is adhered to the first surface. This design facilitates stable and effective adhesion of the tape to the electrode assembly.

[0023] Thirdly, this application provides a battery production system, which includes the battery adhesive applicator described above. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the battery adhesive applicator described in some embodiments of this application.

[0025] Figure 2 This is a partial structural diagram of the extruder pressing onto the electrode assembly as described in some embodiments of this application.

[0026] Figure 3 This is a schematic diagram of the structure of the extruder described in some embodiments of this application. Figure 1 .

[0027] Figure 4 This is a schematic diagram of the structure of the extruder described in some embodiments of this application. Figure 2 .

[0028] Figure 5 This is a schematic diagram of the structure of the extruder described in some embodiments of this application. Figure 3 .

[0029] Figure 6 The structure of the extruder and the mounting base as described in some embodiments of this application. Figure 1 .

[0030] Figure 7 The structure of the extruder and the mounting base as described in some embodiments of this application. Figure 2 .

[0031] Figure 8 This is a schematic diagram of the battery adhesive application device described in some other embodiments of this application.

[0032] Figure 9 This is a schematic diagram of the battery adhesive application device described in some other embodiments of this application.

[0033] Figure 10 This is a structural diagram showing the assembly of the extruder and electrode components as described in some embodiments of this application.

[0034] Figure 11 The flowchart of the battery adhesive application control method described in some embodiments of this application Figure 1 .

[0035] Figure 12 The flowchart of the battery adhesive application control method described in some embodiments of this application Figure 2 .

[0036] Figure 13 The flowchart of the battery adhesive application control method described in some embodiments of this application Figure 3 .

[0037] Figure 14 (a), (b), (c), and (d) are schematic diagrams of the four steps in the adhesive application process described in some embodiments of this application.

[0038] 10. Adhesive application assembly; 20. Extruder; 21. First pressing surface; 22. Second pressing surface; 23. Transition surface; 24. Rounded corner; 25. Fixing component; 26. Adhesive application gap; 261. Inner wall; 27. Scale line; 30. Mounting base; 31. Adjustment groove; 32. Notch; 33. Drive assembly; 40. Operating table; 41. Adhesive application position; 50. Electrode assembly; 51. Diaphragm; 511. Membrane end; 52. First surface; 53. Second surface; 54. Side surface; 60. Adhesive tape; X, Preset direction; Y, Thickness direction. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] In the battery manufacturing process, adhesive tape is typically used to bind the electrode assembly to achieve the purpose of shaping and stabilizing the electrode assembly. The electrode assembly usually includes electrode sheets and separators stacked on both surfaces of the electrode sheets. During the adhesive application process, when the tape is applied from the side of the electrode assembly to the surface of the electrode assembly, it can cause appearance defects such as the separator folding upwards or the electrode sheets being exposed due to the separator lifting up, which makes it difficult to improve the production yield.

[0046] Based on this, and addressing the problems of separator folding and exposed electrode sheets that are prone to occur in traditional battery bonding processes, this application provides a battery bonding device. An extruder is introduced, and during the bonding process, the extruder bends the membrane end located on the side of the separator along the direction towards the second surface, so that the membrane end of the separator has a pre-existing anti-folding force along the direction towards the first surface. Thus, when the bonding assembly applies the adhesive from the side of the electrode assembly to the first surface, the bent membrane end can effectively resist at least part of the folding force brought about by the bonding process. This design effectively reduces the probability of separator folding and exposed electrode sheets, which is beneficial for improving production yield.

[0047] According to some embodiments of this application, please refer to Figure 1 and Figure 2 ,in, Figure 2 The dashed box in the image is added to clearly illustrate the side surface 54 of the electrode assembly 50. This application provides a battery adhesive applicator, comprising an adhesive applicator 10 and an extruder 20. The adhesive applicator 10 is configured to apply adhesive tape 60 from the side surface 54 of the electrode assembly 50 to a first surface 52 of the electrode assembly 50. The electrode assembly 50 includes a first surface 52 and a second surface 53 distributed along its thickness direction Y, and a side surface 54 located between the first surface 52 and the second surface 53. The electrode assembly 50 includes a separator 51 having a membrane end 511 located at the side surface 54. The extruder 20 is configured to at least partially press against the membrane end 511 of the separator 51 located at the side surface 54, causing the membrane end 511 of the separator 51 to bend along the thickness direction Y of the electrode assembly 50 and toward the second surface 53.

[0048] The adhesive application assembly 10 refers to a component that can apply the adhesive tape 60 to the electrode assembly 50 at the desired location. Its structure can have various designs. For example, the adhesive application assembly 10 may include a multi-axis moving robot arm, which uses the robot arm to apply the adhesive tape 60 to the desired location; or, the adhesive application assembly 10 may also include an adhesive application head and moving parts in different directions, such as cylinders, hydraulic cylinders, linear modules, etc., which use moving parts in different directions to drive the adhesive application head to press on the adhesive tape 60, so that the adhesive tape 60 can be completely applied.

[0049] During adhesive application, the adhesive application assembly 10 can bend the adhesive tape 60 from the side 54 of the electrode assembly 50 and apply it to the first surface 52 of the electrode assembly 50; alternatively, the adhesive tape 60 can be applied from the second surface 53 to the side 54 of the electrode assembly 50, and then from the side 54 of the electrode assembly 50 to the first surface 52 of the electrode assembly 50. Simultaneously, during adhesive application, the first surface 52 can be located above or below the second surface 53. In this case, the adhesive tape 60 is applied downwards and bent from the side 54 of the electrode assembly 50 to the first surface 52, and the extruder 20 applies upward pressure to the membrane end 511 of the diaphragm 51.

[0050] Among them, the electrode assembly 50 refers to the component in the battery where the electrochemical reaction occurs. It is mainly formed by winding or stacking electrode sheets. The electrode sheets are divided into positive electrode sheets and negative electrode sheets. The part of the electrode sheet with active material constitutes the main body of the electrode assembly 50, and the part of the electrode sheet without active material constitutes the tab.

[0051] Typically, in addition to a separator 51 being disposed between the positive and negative electrodes, a separator 51 is also stacked on the outermost electrode of the electrode assembly 50. In a wound electrode assembly 50, the membrane ends 511 of the separator 51 can be located on the side 54 of the electrode assembly 50 with tabs and the side 54 facing away from the tabs, respectively; in a stacked electrode assembly 50, the membrane ends 511 of the separator 51 can be located on each of the circumferential side surfaces 54 of the electrode assembly 50, respectively. In this case, the side surface 54 of the electrode assembly 50 can be understood as the surface formed by the overlapping of the end faces of each electrode and the end faces of each separator 51, and the first surface 52 and the second surface 53 of the electrode assembly 50 can be the surfaces of the separators 51 distributed on the outermost sides along the thickness direction Y of the electrode assembly 50, respectively.

[0052] Meanwhile, the membrane end 511 of the diaphragm 51 can be flush with the edge of the corresponding electrode or extend beyond the edge of the corresponding electrode. Specifically, in some examples, the membrane end 511 of the diaphragm 51 extends 1mm to 5mm beyond the edge of the electrode corresponding to it.

[0053] When the adhesive application assembly 10 applies the adhesive tape 60 from the side 54 of the electrode assembly 50 to the first surface 52, the membrane end 511 of the diaphragm 51 will be subjected to a folding force from the adhesive tape 60 in the direction toward the first surface 52. This can easily cause the membrane end 511 of the diaphragm 51 to fold toward the first surface 52; or, the membrane end 511 of the diaphragm 51 to fold over, exposing the electrode sheet or other defects. It is easy to understand that the first surface 52 is formed on the surface of the diaphragm 51, indicating that at least one diaphragm 51 is located on the outermost surface of the electrode assembly 50. Since the membrane end 511 of the diaphragm 51 is located at the side 54, when applying adhesive to the side 54, a portion of the adhesive tape 60 will also be applied to the membrane end 511 of the diaphragm 51.

[0054] Therefore, during the adhesive application process, in this embodiment, the extruder 20 bends the membrane end 511 of the diaphragm 51 located on the side 54 in the direction toward the second surface 53, so that the membrane end 511 of the diaphragm 51 has a pre-existing anti-folding force in the direction toward the first surface 52. When the adhesive application assembly 10 applies the adhesive from the side 54 of the electrode assembly 50 to the first surface 52, the bent membrane end 511 of the diaphragm 51 can effectively resist at least part of the folding force brought about by the adhesive application.

[0055] The extruder 20 can press only against the membrane end 511 of the diaphragm 51, causing the membrane end 511 of the diaphragm 51 to bend towards the second surface 53, or it can partially press against the membrane end 511 of the diaphragm 51 while the other part presses against the first surface 52. When the extruder 20 only presses against the membrane end 511 of the diaphragm 51, to ensure more stable adhesive application, other structures can be used to press against the first surface 52 of the electrode assembly 50. This allows the electrode assembly 50 to be effectively shaped and improves the adhesive application effect. It is easy to understand that when the extruder 20 at least partially presses against the membrane end 511 of the diaphragm 51, the position of the electrode assembly 50 to be adhesively applied is located on one side of the extruder 20, that is, the adhesive application assembly 10 performs the adhesive application operation on one side of the extruder 20, which reduces the probability of interference between the two.

[0056] In addition, the membrane end 511 of the diaphragm 51 is bent in the direction toward the second surface 53. The degree of bending can be designed in various ways. For example, in some examples, the bent membrane end 511 of the diaphragm 51 is closer to the second surface 53 than the unbent part of the diaphragm 51, and the distance between the two is greater than 0.

[0057] This design effectively reduces the likelihood of defects such as diaphragm folding and exposed electrode sheets, which helps improve production yield.

[0058] According to some embodiments of this application, optionally, the extruder 20 includes a first pressing surface 21 and a second pressing surface 22, the first pressing surface 21 being configured to press against a first surface 52, and the second pressing surface 22 being used to press against the membrane end 511 of the diaphragm 51, such that the membrane end 511 bends along the thickness direction Y of the electrode assembly 50 and toward the second surface 53.

[0059] It can be seen that during the adhesive application process, the first pressing surface 21 of the extruder 20 presses against the first surface 52 of the electrode assembly 50, and the second pressing surface 22 presses against the membrane end 511 of the diaphragm 51. In this way, while bending the membrane end 511 of the diaphragm 51, the electrode assembly 50 can also be shaped as a whole, thereby improving the stability of the adhesive application.

[0060] The first pressing surface 21 can be a plane or a curved surface. When the first pressing surface 21 is curved, a portion of the first pressing surface 21 presses against the first surface 52. Similarly, the second pressing surface 22 can also be a plane or a curved surface, as long as it allows the membrane end 511 of the separator 51 to be bent towards the second surface 53. In some specific examples, at least a portion of the second pressing surface 22 protrudes relative to the first pressing surface 21 along the side facing the adhesive application position 41 of the battery adhesive applicator. This protrusion can be inclined or curved, etc.

[0061] In addition, the first pressing surface 21 and the second pressing surface 22 can be directly connected and form an edge between them; or they can be indirectly connected, for example, the first pressing surface 21 and the second pressing surface 22 can be smoothly connected.

[0062] This design introduces a first pressing surface 21 and a second pressing surface 22, which causes the membrane end 511 of the diaphragm 51 to bend and the electrode assembly 50 to be effectively shaped during the adhesive application process, thereby improving the stability of the adhesive application and thus improving the adhesive application effect and yield.

[0063] Optionally, according to some embodiments of this application, please refer to Figure 3 The second pressing surface 22 is inclined or curved relative to the first pressing surface 21, so that at least a portion of the second pressing surface 22 is closer to the adhesive application position 41 of the battery adhesive application device relative to the first pressing surface 21.

[0064] The adhesive application position 41 refers to the position where the electrode assembly 50 is applied with adhesive. For example, the battery adhesive application device also includes an operating table 40, and the adhesive application position 41 is set on the surface of the operating table 40. In this way, during the adhesive application process, the electrode assembly 50 can be placed on the adhesive application position 41 of the operating table 40; or, it can be transported to the adhesive application position 41 of the operating table 40 by power equipment such as cylinders, hydraulic cylinders, and linear modules.

[0065] Since at least a portion of the second pressing surface 22 is closer to the adhesive application position 41 than the first pressing surface 21, when the first pressing surface 21 and the second pressing surface 22 press against the first surface 52 and the membrane end 511 of the diaphragm 51, respectively, the membrane end 511 of the diaphragm 51 is pressed deeper under the action of the second pressing surface 22, causing the membrane end 511 of the diaphragm 51 to bend toward the side of the second surface 53. In some examples, the second pressing surface 22 is inclined relative to the first pressing surface 21, and the angle between them is an obtuse angle.

[0066] This design allows the second pressing surface 22 to press the membrane end 511 of the diaphragm 51 deeper, causing the membrane end 511 of the diaphragm 51 to bend in the direction toward the second surface 53. This helps to reduce the chance of the diaphragm 51 flipping during the adhesive application process, and improves the adhesive application effect and yield.

[0067] Optionally, according to some embodiments of this application, please refer to Figure 3 The second pressing surface 22 is inclined relative to the first pressing surface 21, and the angle between them is an obtuse angle.

[0068] It is known that both the second pressing surface 22 and the first pressing surface 21 are planar structures, and they are set at an angle. When designing the angle between them, if the angle between them is acute, one end of the second pressing surface 22 will be more inclined toward the side where the first pressing surface 21 is located. In this way, in order for the second pressing surface 22 to press against the membrane end 511 of the diaphragm 51, more of the first pressing surface 21 needs to be moved out of the electrode assembly 50, which makes the operation very inconvenient; at the same time, it will also increase the difficulty of bending the membrane end 511 of the diaphragm 51 by the second pressing surface 22.

[0069] Therefore, in this embodiment, the angle between the second pressing surface 22 and the first pressing surface 21 is designed to be an obtuse angle, so that one end of the second pressing surface 22 is deflected in the direction away from the first pressing surface 21, fully exposing the second pressing surface 22, thereby making it easier for the second pressing surface 22 to press against the membrane end 511 of the diaphragm 51, improving the convenience of operation.

[0070] This design makes it easier to expose the second pressing surface 22, making it easier for the second pressing surface 22 to press against the membrane end 511 of the diaphragm 51, improving the convenience of operation, and thus helping to improve the adhesive application effect and yield.

[0071] Optionally, according to some embodiments of this application, please refer to Figure 3 The angle between the second pressing surface 22 and the first pressing surface 21 is denoted as θ, where 120°≤θ≤150°.

[0072] When the angle between the second pressing surface 22 and the first pressing surface 21 is an obtuse angle, if the angle between the second pressing surface 22 and the first pressing surface 21 approaches 90°, that is, the second pressing surface 22 and the first pressing surface 21 are set almost perpendicularly, this is not conducive to the second pressing surface 22 pressing against the membrane end 511 of the diaphragm 51; at the same time, if the size of the membrane end 511 of the diaphragm 51 extending out of the electrode assembly 50 becomes larger, it is easy to exceed the pressing range of the second pressing surface 22. In this case, the first pressing surface 21 needs to be moved outward to facilitate the second pressing surface 22 pressing against the membrane end 511 of the diaphragm 51, resulting in poor compatibility of the extruder 20 with electrode assemblies 50 of different specifications.

[0073] Of course, if the angle between the second pressing surface 22 and the first pressing surface 21 is close to 180°, the first pressing surface 21 and the second pressing surface 22 are close to a planar design, which will result in the second pressing surface 22 having a limited bending effect on the membrane end 511 of the diaphragm 51.

[0074] Therefore, in this embodiment, the angle between the two is controlled between 120° and 150°, for example, but not limited to 120°, 125°, 130°, 135°, 140°, 145°, 150°, etc.

[0075] This design controls the angle between the second pressing surface 22 and the first pressing surface 21 to be between 120° and 150°, which can effectively improve the compatibility with electrode assemblies 50 of different specifications; at the same time, it can also improve the bending effect of the membrane end 511 of the diaphragm 51, thereby improving the adhesive application effect and yield.

[0076] Optionally, according to some embodiments of this application, please refer to Figure 4 The extrusion member 20 also includes a transition surface 23, which is connected between the first pressing surface 21 and the second pressing surface 22, and is constructed as an arc-shaped concave surface.

[0077] The transition surface 23 refers to the connecting surface located between the first pressing surface 21 and the second pressing surface 22. When the first pressing surface 21 presses against the first surface 52 and the second pressing surface 22 presses against the membrane end 511 of the diaphragm 51, the transition surface 23 will also press against other parts of the diaphragm 51. If there is an angle between the first pressing surface 21 and the second pressing surface 22, it is easy to form an angled indentation on the diaphragm 51, increasing the risk of the diaphragm 51 being damaged.

[0078] Therefore, an arc-shaped concave transition surface 23 is provided between the first pressing surface 21 and the second pressing surface 22, which can effectively reduce the probability of the diaphragm 51 being damaged by pressure. The radius of curvature of the concave surface of the transition surface 23 can be designed according to the actual size of the extrusion part 20.

[0079] This design, which introduces a curved concave transition surface 23, can effectively reduce the probability of the diaphragm 51 being damaged by pressure and improve the structural stability of the electrode assembly 50 during the adhesive application process, thereby improving the adhesive application effect and yield.

[0080] Optionally, according to some embodiments of this application, please refer to Figure 5 The end of the second pressing surface 22 that is away from the first pressing surface 21 includes a rounded corner 24.

[0081] The rounded corner 24 refers to the structure where one end of the second pressing surface 22 is rounded, which can reduce interference with the edge structure of the electrode assembly 50, such as reducing interference with the edge of the electrode sheet of the electrode assembly 50.

[0082] The radius of the fillet 24 can be designed in various ways. For example, the radius of the fillet 24 can be, but is not limited to, between 0.5mm and 1mm. In some examples, in addition to providing the fillet 24 at the end of the second pressing surface 22 away from the first pressing surface 21, the fillet 24 can also be provided on other edges of the second pressing surface 22 and the first pressing surface 21.

[0083] This design, with a rounded corner 24 at one end of the second pressing surface 22, reduces the chance of interference with the edge structure of the electrode assembly 50, thereby reducing the risk of edge damage to the electrode assembly 50 and improving the adhesive application effect and yield.

[0084] Optionally, according to some embodiments of this application, please refer to Figure 6 The battery adhesive applicator also includes a mounting base 30, and an extruder 20 is disposed on the mounting base 30. The extruder 20 can be positioned on the mounting base 30 along a preset direction X, wherein the preset direction X is the direction in which the first pressing surface 21 and the second pressing surface 22 are distributed sequentially.

[0085] Mounting base 30 refers to the structure for mounting the extruder 20. It can be designed as a block structure or a plate structure, etc. When the extruder 20 is set on the mounting base 30, its position can be adjusted along the preset direction X. This adjusts the size of the second pressing surface 22 extending out of the electrode assembly 50, so that the second pressing surface 22 can better press against the membrane end 511 of the diaphragm 51, improving the pressing effect.

[0086] The extrusion component 20 can be installed on the mounting base 30 in various ways, such as by setting a sliding groove and a slider that cooperate with each other between the two; or by setting a guide rail and a slider between the two.

[0087] Additionally, the extruder 20 can be disposed on the same side of the mounting base 30 to press against the membrane end 51 on one side of the diaphragm 50, thereby meeting the adhesive application requirements on the electrode assembly 50 side. For details, please refer to... Figure 1 The extrusion member 20 can also be disposed on opposite sides of the mounting base 30, for example: please refer to Figure 7 and Figure 8 The pressing members 20 on opposite sides of the mounting base 30 can abut against the membrane ends 51 on opposite sides of the diaphragm 50 in the same electrode assembly 50; of course, in some examples, please refer to Figure 7 and Figure 9 The extrusion members 20 on opposite sides of the mounting base 30 can abut against the membrane ends 51 of the diaphragms 50 in different electrode assemblies 50. Furthermore, it is understood that when the extrusion members 20 are respectively disposed on opposite sides of the mounting base 30, the number of adhesive application assemblies 10 is not limited to... Figure 8 and Figure 9The two shown are not exhaustive; other options are also possible. For example, the number of adhesive application components 10 can be one, so that after completing the adhesive application operation on one side, it can be moved to the other side of the mounting base 30 via a moving or rotating mechanism. Of course, the number of adhesive application components 10 can also be configured one-to-one according to the number of adhesive application positions.

[0088] This design allows for adjustment of the size of the second pressing surface 22 extending beyond the electrode assembly 50, enabling the second pressing surface 22 to better press against the membrane end 511 of the diaphragm 51. This allows the pressing component to adapt to the process requirements of different specifications of electrode assemblies 50 and different adhesive application positions 41, thereby improving the versatility and process adaptability of the device.

[0089] Optionally, according to some embodiments of this application, please refer to Figure 6 In the mounting base 30 and the extrusion member 20, one of them is provided with an adjustment groove 31 extending in a preset direction X, and the other is provided with a fixing member 25. The fixing member 25 passes through the adjustment groove 31 and can be moved and adjusted in a preset direction X.

[0090] It can be seen that when adjusting the position of the extruder 20, the fixing member 25 can be moved in the adjustment groove 31 along the preset direction X to change the position of the second pressing surface 22 of the extruder 20 so that it presses against the membrane end 511 of the diaphragm 51.

[0091] The fixing member 25 can be disposed on the mounting base 30, and the adjusting groove 31 can be disposed on the extrusion member 20; alternatively, the fixing member 25 can be disposed on the extrusion member 20, and the adjusting groove 31 can be disposed on the mounting base 30. In some specific examples, the fixing member 25 is disposed on the extrusion member 20, and the adjusting groove 31 is disposed on the mounting base 30.

[0092] To facilitate the fixing of the fastener 25 in the adjustment groove 31 after adjustment, the fastener 25 can be fixed in the adjustment groove 31 by using nuts, pins or other components; or the fastener 25 can be fixed in the adjustment groove 31 by using clips or magnetic attraction.

[0093] This design, through the adjustment groove 31 and the fixing member 25, facilitates the adjustment of the position of the extrusion member 20, thereby improving the convenience of the adjustment operation of the extrusion member 20.

[0094] Optionally, according to some embodiments of this application, please refer to Figure 6 The extrusion part 20 is provided with several scale lines 27, and each scale line 27 is distributed sequentially along the preset direction X.

[0095] It can be seen that each scale line 27 can be distributed along the extension path of the first pressing surface 21 and the second pressing surface 22. In this way, when adjusting the position of the extruder 20, the second pressing surface 22 can be quickly and accurately pressed against the membrane end 511 of the diaphragm 51 by observing the corresponding scale line 27.

[0096] This design, with the introduction of scale lines 27, facilitates quick and accurate adjustment of the extrusion piece 20, improving adjustment efficiency and precision.

[0097] Optionally, according to some embodiments of this application, please refer to Figure 6 The number of extrusion parts 20 includes multiple parts, and an adhesive application gap 26 is formed between two adjacent extrusion parts 20. The adhesive application gap 26 is configured to allow the adhesive application assembly 10 to perform adhesive application operations.

[0098] The adhesive application gap 26 refers to the space where the adhesive application assembly 10 can perform adhesive application on the electrode assembly 50. When two adjacent extruders 20 are pressed on the electrode assembly 50, the adhesive application gap 26 can expose the position on the electrode assembly 50 that needs to be adhesive applied. For example, the adhesive application gap 26 can expose the first surface 52 and the side surface 54 of the electrode assembly 50.

[0099] During the adhesive application process, the second pressing surfaces 22 of two adjacent extruders 20 press against the same membrane end 511 of the diaphragm 51, causing it to bend in the direction toward the second surface 53. Thus, the portion of the diaphragm 51 located in the adhesive application gap 26 also bends in the direction toward the second surface 53. At this time, the adhesive application assembly 10 can extend into the adhesive application gap 26, allowing the tape 60 to be applied from at least the side 54 of the electrode assembly 50 to the first surface 52. Of course, in some examples, the adhesive application assembly 10 may first adhere the tape 60 to the second surface 53, then adhere it to the side 54 of the electrode assembly 50, and finally adhere it from the side 54 of the electrode assembly 50 to the first surface 52.

[0100] In addition, to further facilitate adhesive application, the mounting base 30 is provided with a notch 32 communicating with the adhesive application gap 26. Meanwhile, the extrusion member 20 can be positioned on the same side of the mounting base 30, as can be seen from [reference needed]. Figure 6 Alternatively, they can be installed on different sides of the mounting base 30, as can be found in the following reference. Figure 7 .

[0101] This design introduces multiple extrusion parts 20, increasing the number of stress points on the membrane end 511 of the diaphragm 51. This makes it easier for the membrane end 511 of the diaphragm 51 located in the adhesive gap 26 to bend, thereby more effectively reducing the probability of defects such as diaphragm 51 folding and exposed electrode sheet, and improving the adhesive application effect and yield.

[0102] Optionally, according to some embodiments of this application, please refer to Figure 10 The inner wall 261 of the adhesive gap 26 is configured to have a single-sided spacing D1 between itself and the adhesive tape 60 located within itself, wherein 0≤D1≤20mm.

[0103] It can be seen that when the single-sided spacing is 0mm, the adhesive gap 26 is just enough to allow the tape 60 to be pasted; if the single-sided spacing is designed to be too large, it means that the extruder 20 is too far away from the position where the tape 60 is to be pasted. In this way, the low pressure applied by the extruder 20 to the membrane end 511 of the diaphragm 51 will relatively weaken the force on the pasted position, thus weakening the bending effect of the membrane end 511 of the diaphragm 51 at the pasted position.

[0104] Therefore, in this embodiment, the single-sided spacing is controlled within 20mm, such as, but not limited to, 0mm, 1mm, 3mm, 5mm, 6mm, 8mm, 10mm, 15mm, 20mm, etc. Of course, in some examples, the single-sided spacing D1 can also be 5mm~10mm.

[0105] The width of the tape 60 can be varied, for example, the width of the tape 60 can be 5mm to 12mm. In this case, the width of the adhesive gap 26, that is, the distance between two adjacent extrusion parts 20, can be controlled between 5mm and 52mm.

[0106] In addition, it is easy to understand that the adhesive gap 26 in this embodiment is formed between two adjacent extruders 20. Therefore, the inner wall 261 of the adhesive gap 26 can be the side wall of the extruder 20 facing the adhesive gap 26.

[0107] This design controls the single-sided spacing to within 20mm. While meeting the space required for effective adhesive application, it controls the distance between the extruder 20 and the position to be pasted, so that the pressure applied by the extruder 20 can be effectively transmitted to the membrane end 511 of the diaphragm 51 located at the position to be pasted, improving the bending effect, thereby improving the adhesive application effect and yield.

[0108] Optionally, according to some embodiments of this application, please refer to Figure 1 The battery applicator also includes a drive assembly 33, which drives the extruder 20 to move closer to or away from the applicator position 41 of the battery applicator.

[0109] The drive assembly 33 refers to the component that provides power for the movement of the extruder 20. It can be a cylinder, hydraulic cylinder, electric cylinder, etc., or a combination of a motor and a transmission mechanism, such as a combination of a motor and a gear and rack, or a combination of a motor and a lead screw mechanism.

[0110] It can be seen that during the adhesive application process, after the electrode assembly 50 moves to the adhesive application position 41, the drive assembly 33 can drive the extruder 20 to move closer to the adhesive application position 41, so that the extruder 20 presses against the membrane end 511 of the diaphragm 51; after the adhesive application operation is completed, the drive assembly 33 can drive the extruder 20 away from the adhesive application position 41, so that the extruder 20 is detached from the electrode assembly 50. In addition, in some examples, the drive assembly 33 is connected to the mounting base 30, and the extruder 20 is disposed on the mounting base 30.

[0111] This design, with the introduction of drive component 33, enables automatic control of the extrusion part 20, which helps to improve the automation of the adhesive application operation.

[0112] According to some embodiments of this application, please refer to Figure 11 This application provides a battery adhesive application control method, employing any of the above-mentioned battery adhesive application devices, the method comprising the following steps:

[0113] S100, at least a portion of the control extruder 20 presses against the membrane end 511 of the diaphragm 51 located on the side 54 of the electrode assembly 50, so that the membrane end 511 of the diaphragm 51 bends along the thickness direction Y of the electrode assembly 50 and toward the second surface 53.

[0114] S200, the adhesive application assembly 10 applies adhesive tape 60 from at least the side 54 of the electrode assembly 50 to the first surface 52 of the electrode assembly 50 on one side of the extruder 20, wherein a portion of the adhesive tape 60 is adhered to the membrane end 511.

[0115] In step S100, the extruder 20 may press only against the membrane end 511 of the diaphragm 51, or it may press partly against the first surface 52 of the electrode assembly 50 and partly against the membrane end 511 of the diaphragm 51. When the extruder 20 presses against the membrane end 511 of the diaphragm 51 and causes it to bend, the membrane end 511 of the diaphragm 51 may have an anti-folding force. In this way, when the tape 60 is attached from the side 54 of the electrode assembly 50 to the first surface 52, it can effectively resist the folding force applied by the tape 60 to the membrane end 511 of the diaphragm 51, reducing the defects of diaphragm 51 folding and exposed electrode sheet.

[0116] In step S200, the adhesive application assembly 10 can bend the adhesive tape 60 from the side 54 of the electrode assembly 50 and apply it to the first surface 52 of the electrode assembly 50; or it can apply the adhesive tape 60 from the second surface 53 to the side 54 of the electrode assembly 50, and then apply it from the side 54 of the electrode assembly 50 to the first surface 52 of the electrode assembly 50.

[0117] This design effectively reduces the likelihood of defects such as diaphragm folding and exposed electrode sheets, which helps improve production yield.

[0118] Optionally, according to some embodiments of this application, please refer to Figure 2 In the step of controlling at least a portion of the extruder 20 to press against the membrane end 511 of the diaphragm 51 located on the side 54 of the electrode assembly 50, the maximum distance between the bent membrane end 511 and the unbent portion of the diaphragm 51 on the first surface 52 in the thickness direction Y of the electrode assembly 50 is denoted as D2, where 0 mm < D2 ≤ 5 mm.

[0119] It can be seen that the downward displacement of the membrane end 511 of the diaphragm 51 can be between 0mm and 5mm, for example, but not limited to 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc.

[0120] This design controls the downward displacement of the membrane end 511 of the diaphragm 51 to between 0mm and 5mm, which makes the diaphragm 51 have effective anti-folding force and reduces the probability of folding and exposed electrode defects. At the same time, it also reduces the probability that the diaphragm 51 will directly adhere to the side 54 of the electrode assembly 50 due to excessive bending, thus improving the adhesive application effect and yield.

[0121] Optionally, according to some embodiments of this application, please refer to Figure 2 The maximum spacing D2 also satisfies the condition that 1mm≤D2≤3mm.

[0122] It can be seen that the downward displacement of the membrane end 511 of the diaphragm 51 can be further selected between 1mm and 3mm, for example, but not limited to 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, etc.

[0123] This design allows the downward displacement of the membrane end 511 of the diaphragm 51 to be further controlled within 1mm to 3mm, which can effectively improve the adhesive application effect and yield.

[0124] Optionally, according to some embodiments of this application, please refer to Figure 12 S100, the step of controlling the extruder 20 to at least partially press the membrane end 511 located at the side 54 of the electrode assembly 50 includes:

[0125] S110, the first pressing surface 21 of the control extruder 20 presses against the first surface 52 of the electrode assembly 50;

[0126] S120, the second pressing surface 22 of the control extruder 20 extends out of the membrane end 511 of the diaphragm 51 at one end away from the first pressing surface 21, and presses the second pressing surface 22 against the membrane end 511 of the diaphragm 51, wherein the second pressing surface 22 is inclined relative to the first pressing surface 21.

[0127] In step S110, the first pressing surface 21 can be pressed onto the first surface 52, so that the electrode assembly 50 maintains relative plasticity during the adhesive application process, reducing adhesive displacement caused by shifting or deformation. When the first pressing surface 21 presses against the first surface 52, a reasonable pressure can be controlled to keep the electrode assembly 50 stable, for example, but not limited to, 40 kgf ~ 56 kgf.

[0128] In step S120, since the second pressing surface 22 is inclined relative to the first pressing surface 21, the second pressing surface 22 is more likely to press against the membrane end 511 of the diaphragm 51, causing it to bend. Specifically, in some examples, before bending the membrane end 511 of the diaphragm 51, the position of the first pressing surface 21 can be appropriately adjusted so that the second pressing surface 22 can effectively press against the membrane end 511 of the diaphragm 51. For example, the first pressing surface 21 is pressed against the first surface 52, and the end of the first pressing surface 21 near the second pressing surface 22 extends 0.1 mm beyond the membrane end 511 of the diaphragm 51.

[0129] This design introduces a first pressing surface 21 and a second pressing surface 22, which causes the membrane end 511 of the diaphragm 51 to bend and the electrode assembly 50 to be effectively shaped during the adhesive application process, thereby improving the stability of the adhesive application and thus improving the adhesive application effect and yield.

[0130] Optionally, according to some embodiments of this application, please refer to Figure 13 and Figure 14 In steps (a) to (d), S200, the step of controlling the adhesive application assembly 10 to apply the adhesive tape 60 at least from the side 54 of the electrode assembly 50 to the first surface 52 of the electrode assembly 50 on one side of the extruder 20 includes:

[0131] S210, Control the adhesive application assembly 10 to apply the tape 60 to the second surface 53 of the electrode assembly 50;

[0132] S220, control the adhesive application assembly 10 to move to the side 54 of the electrode assembly 50;

[0133] S230, control the adhesive application assembly 10 to move along the thickness direction Y of the electrode assembly 50 and toward the first surface 52, so that the adhesive tape 60 is adhered to the side 54 of the electrode assembly 50.

[0134] S240, control the adhesive application assembly 10 to move onto the first surface 52 of the electrode assembly 50, so that the adhesive tape 60 is adhered to the first surface 52.

[0135] Therefore, it can be seen that the adhesive application method in this embodiment is to first stick the tape 60 to the second surface 53, then stick it to the side 54 of the electrode assembly 50, and finally stick it from the side 54 of the electrode assembly 50 to the first surface 52. At this time, the adhesive tape 60 is in or approximately U-shaped.

[0136] This design makes it easy to stably and effectively attach the tape 60 to the electrode assembly 50.

[0137] According to some embodiments of this application, this application provides a battery production system, which includes the battery adhesive applicator described above.

[0138] According to some embodiments of this application, please refer to Figures 1 to 10 This application provides a battery adhesive applicator, which includes a drive assembly 33, a mounting base 30, an adhesive applicator 10, and an extruder 20. The extruder 20 is adjustablely mounted on the mounting base 30, and the drive assembly 33 drives the mounting base 30 to move closer to or away from the adhesive applicator 41. The extruder 20 includes a first pressing surface 21, a second pressing surface 22, and a transition surface 23 connecting the first pressing surface 21 and the second pressing surface 22. The transition surface 23 is an arc-shaped curved surface, and the second pressing surface 22 is set at an obtuse angle with the first pressing surface 21. The first pressing surface 21 is used to press against the first surface 52 of the electrode assembly 50, and the second pressing surface 22 is used to press against the membrane end 511 of the separator 51, so that the membrane end 511 of the separator 51 bends towards the second surface 53.

[0139] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0140] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery adhesive applicator, characterized in that, The battery adhesive applicator includes: An adhesive application assembly (10) is configured to apply at least one tape (60) from a side (54) of an electrode assembly (50) to a first surface (52) of the electrode assembly (50), wherein the electrode assembly (50) includes a first surface (52) and a second surface (53) distributed along its own thickness direction (Y), and the side surface (54) located between the first surface (52) and the second surface (53), and the electrode assembly (50) includes a diaphragm (51) having a membrane end (511) located at the side surface (54); An extruder (20) is configured to at least partially press against the membrane end (511) of the diaphragm (51) so that the membrane end (511) of the diaphragm (51) bends along the thickness direction (Y) of the electrode assembly (50) and toward the second surface (53).

2. The battery adhesive applicator according to claim 1, characterized in that, The extrusion member (20) includes a first pressing surface (21) and a second pressing surface (22). The first pressing surface (21) is configured to press against the first surface (52), and the second pressing surface (22) is used to press against the membrane end (511) of the diaphragm (51) so that the membrane end (511) bends along the thickness direction (Y) of the electrode assembly (50) and toward the second surface (53).

3. The battery adhesive applicator according to claim 2, characterized in that, The second pressing surface (22) is inclined or curved relative to the first pressing surface (21) so that at least a portion of the second pressing surface (22) is closer to the adhesive application position (41) of the battery adhesive application device relative to the first pressing surface (21).

4. The battery adhesive applicator according to claim 3, characterized in that, The second pressing surface (22) is inclined relative to the first pressing surface (21), and the angle between them is an obtuse angle; and / or, The angle between the second pressing surface (22) and the first pressing surface (21) is denoted as θ, where 120°≤θ≤150°.

5. The battery adhesive applicator according to claim 2, characterized in that, The extrusion member (20) further includes a transition surface (23) connecting the first pressing surface (21) and the second pressing surface (22), and is configured as an arcuate concave surface; and / or, The end of the second pressing surface (22) away from the first pressing surface (21) includes a rounded corner (24).

6. The battery adhesive applicator according to any one of claims 2-5, characterized in that, The battery adhesive applicator also includes a mounting base (30), and the extruder (20) is disposed on the mounting base (30). The extruder (20) can be adjusted in position on the mounting base (30) along a preset direction (X), wherein the preset direction (X) is the direction in which the first pressing surface (21) and the second pressing surface (22) are distributed sequentially.

7. The battery adhesive applicator according to claim 6, characterized in that, Of the mounting base (30) and the pressing member (20), one is provided with an adjustment groove (31) extending along the preset direction (X), and the other is provided with a fixing member (25). The fixing member (25) passes through the adjustment groove (31) and can be moved and adjusted along the preset direction (X); and / or, The extrusion piece (20) is provided with a plurality of scale lines (27), and each scale line (27) is distributed sequentially along the preset direction (X).

8. The battery adhesive applicator according to claim 6, characterized in that, The number of the extrusion parts (20) includes a plurality of them, and an adhesive application gap (26) is formed between two adjacent extrusion parts (20). The adhesive application gap (26) is configured to allow the adhesive application assembly (10) to perform adhesive application operations.

9. The battery adhesive applicator according to claim 8, characterized in that, The inner wall (261) of the adhesive gap (26) is configured to have a single-sided spacing D1 between itself and the adhesive tape (60) located within itself, wherein 0≤D1≤20mm.

10. The battery adhesive applicator according to any one of claims 1-5, characterized in that, The battery applicator also includes a drive assembly (33) for driving the extruder (20) to move closer to or away from the applicator position (41) of the battery applicator.

11. A battery adhesive application control method, employing the battery adhesive application device as described in any one of claims 1-10, characterized in that, The method includes the following steps: Control at least a portion of the extruder (20) to press against the membrane end (511) of the diaphragm (51) located on the side (54) of the electrode assembly (50) so that the membrane end (511) of the diaphragm (51) bends along the thickness direction (Y) of the electrode assembly (50) and toward the second surface (53). The adhesive application assembly (10) is controlled to apply tape (60) from at least the side (54) of the electrode assembly (50) to the first surface (52) of the electrode assembly (50) on one side of the extruder (20), wherein a portion of the tape (60) is adhered to the membrane end (511).

12. The battery adhesive application control method according to claim 11, characterized in that, In the step of controlling at least a portion of the extruder (20) to press against the membrane end (511) of the diaphragm (51) located on the side (54) of the electrode assembly (50), the maximum distance between the bent membrane end (511) and the unbent portion of the diaphragm (51) located on the first surface (52) in the thickness direction (Y) of the electrode assembly (50) is denoted as D2, where 0 mm < D2 ≤ 5 mm.

13. The battery adhesive application control method according to claim 12, characterized in that, The maximum spacing D2 also satisfies the condition that 1mm≤D2≤3mm.

14. The battery adhesive application control method according to claim 11, characterized in that, The step of controlling at least a portion of the extruder (20) to press against the membrane end (511) of the diaphragm (51) located on the side (54) of the electrode assembly (50) includes: The first pressing surface (21) of the extruder (20) is controlled to press against the first surface (52) of the electrode assembly (50); The second pressing surface (22) of the control extruder (20) extends out of the membrane end (511) of the diaphragm (51) away from the first pressing surface (21), and presses the second pressing surface (22) against the membrane end (511) of the diaphragm (51), wherein the second pressing surface (22) is inclined relative to the first pressing surface (21).

15. The battery adhesive bonding control method according to claim 11, characterized in that, The step of controlling the adhesive application assembly (10) to apply the adhesive tape (60) from at least the side surface (54) of the electrode assembly (50) to the first surface (52) of the electrode assembly (50) on one side of the extruder (20) includes: The adhesive application assembly (10) is controlled to adhere the adhesive tape (60) to the second surface (53) of the electrode assembly (50); Control the adhesive application assembly (10) to move outside the side (54) of the electrode assembly (50); The adhesive application assembly (10) is controlled to move along the thickness direction (Y) of the electrode assembly (50) and toward the first surface (52), so that the adhesive tape (60) is adhered to the side surface (54) of the electrode assembly (50); The adhesive application assembly (10) is controlled to move onto the first surface (52) of the electrode assembly (50), so that the tape (60) is adhered to the first surface (52).

16. A battery production system, characterized in that, The battery production system includes the battery adhesive applicator as described in any one of claims 1-10.

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