Electrode sheet processing device, battery processing system, electrode sheet processing method and battery

Abstract

An electrode sheet processing device (100), a battery processing system (1000), an electrode sheet (2111) processing method and a battery (2000). The electrode sheet processing device (100) comprises a glue application roller (10) and a driving mechanism, wherein the driving mechanism is configured to drive the glue application roller (10) to rotate; an outer peripheral wall of the glue application roller (10) is configured to make contact with an electrode sheet (2111); and the outer peripheral wall of the glue application roller (10) comprises a glue application area (11) and a transition area (12) distributed in a circumferential direction, the glue application area (11) being provided with a glue groove (11111) for accommodating conductive glue, and the glue application area (11) being configured to allow the conductive glue to be roll-coated on the electrode sheet (2111) when making contact with the electrode sheet (2111). The electrode sheet processing device can roll-coat the conductive glue onto a bent portion of the electrode sheet, thereby improving the problem of cracking at the bent portion.

Description

Electrode processing equipment, battery processing system, electrode processing method and battery

[0001] Cross-referencing

[0002] This application claims priority to Chinese patent application No. 202411025602.2, filed on July 29, 2024, with the State Intellectual Property Office of the People's Republic of China, entitled "Electrode Processing Apparatus, Battery Processing System, Electrode Processing Method and Battery", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, specifically to an electrode processing apparatus, a battery processing system, an electrode processing method, and a battery. Background Technology

[0004] In related technologies, electrode assemblies are mainly composed of stacked and wound electrode sheets, which include straight portions and curved portions. The curved portions of the electrode sheets are prone to cracking at the curved locations, affecting the electrode sheets' ability to extract and insert conductive ions such as lithium ions, thereby affecting the charge-discharge cycles of the battery cell and reducing the quality of the battery cell. Summary of the Invention

[0005] In view of the above problems, the purpose of this application is to provide an electrode processing apparatus, a battery processing system, an electrode processing method and a battery, which can improve the technical problem of electrode cracking.

[0006] The technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, embodiments of this application provide an electrode processing apparatus, comprising:

[0008] The coating roller has an outer peripheral wall for contacting the electrode sheet. The outer peripheral wall of the coating roller includes a coating area and a transition area distributed circumferentially. The coating area is provided with a glue groove for accommodating conductive glue. The coating area is used to apply conductive glue to the electrode sheet when in contact with the electrode sheet.

[0009] The drive mechanism is used to drive the coating roller to rotate.

[0010] The electrode processing apparatus provided in this application uses the outer peripheral wall of a coating roller to contact the electrode. The outer peripheral wall of the coating roller is divided into a coating area and a transition area distributed circumferentially. The coating area is provided with a glue groove for accommodating conductive glue. During the electrode processing, the coating roller can be driven to rotate by a drive mechanism so that the coating area contacts the curved portion of the electrode, and the conductive glue in the glue groove on the coating area is rolled onto the curved portion. In this way, conductive glue can be rolled onto the curved portion, and the conductive glue can penetrate into the curved portion, thereby improving the bonding strength and flexibility of the curved portion and thus improving the problem of cracking in the curved portion.

[0011] In some embodiments, the adhesive application area has a mesh pattern, which surrounds and forms multiple adhesive grooves.

[0012] By adopting the above technical solution, multiple adhesive grooves formed by the mesh pattern are used to hold conductive adhesive. In this way, the mesh walls can limit the conductive adhesive in the adhesive grooves, which can improve the problem of conductive adhesive being thrown out during the rotation of the coating roller, thereby improving the coating effect at the bending part and reducing the cracking problem at the bending part.

[0013] In some embodiments, the electrode processing apparatus further includes a storage bin for storing conductive adhesive, with at least a portion of the coating roller located inside the storage bin, and a supply tank taking conductive adhesive from the storage bin.

[0014] In this way, the adhesive application area can apply the conductive adhesive rollers from the storage bin to the curved part.

[0015] In addition, the storage bin allows the coating roller to pick up conductive adhesive during rotation and apply it to the curved part of the electrode sheet, which simplifies the electrode sheet processing operation, improves the electrode sheet processing efficiency, and thus improves the battery processing efficiency.

[0016] In some embodiments, the coating roller has a first side and a second side opposite to each other along a first direction, the first direction intersecting the axial direction of the coating roller; the coating roller is used to contact the electrode on the first side, and at least a portion of the storage bin is located on the second side; the electrode processing apparatus further includes a scraper, which is located on the path of the outer peripheral wall of the coating roller rotating from the second side toward the first side, and is used to abut against the outer peripheral wall of the coating roller; the coating roller is used to rotate relative to the scraper.

[0017] This can improve the problem of large volume and weight of the electrode caused by the coating roller applying conductive adhesive to the curved and straight parts of the electrode, thus helping to improve the energy density of the battery.

[0018] In some embodiments, the electrode processing apparatus further includes a pressure roller, the outer peripheral wall of the pressure roller and the outer peripheral wall of the coating roller are spaced apart to form a roller coating gap for the electrode to pass through, and the coating area is used to cooperate with the pressure roller to apply conductive adhesive to the electrode passing through the roller coating gap.

[0019] This improves the effect of applying conductive adhesive to the bent part in the coating area, thereby reducing the cracking problem of the electrode sheet.

[0020] In some embodiments, the coating area includes at least one set of coating sections, with a glue tank disposed on the coating sections, and each set of coating sections extending along the axial direction of the coating roller.

[0021] When the adhesive application section is set into multiple groups, the multiple groups of adhesive application sections are distributed at intervals along the circumference.

[0022] By extending axially along each group of adhesive application sections, the conductive adhesive can be applied to a larger area of ​​the curved section along its width, thereby effectively improving the problem of cracking in the curved section.

[0023] When the coating area includes multiple coating sections, it can improve the problem of cracking at the bending part and reduce the use of conductive adhesive, which helps to improve the energy density of the battery.

[0024] In some embodiments, the drive mechanism is used to adjust the rotational speed of the coating roller when it contacts the electrode in the coating area and when it contacts the electrode in the transition area.

[0025] This configuration facilitates the contact between the flat portion of the electrode in the transition zone and the curved portion of the electrode in the adhesive coating zone, allowing conductive adhesive to be applied to the curved portion by roller.

[0026] In some embodiments, the adhesive coating area is used for the curved portion of the contact electrode, and the transition area is used for the straight portion of the contact electrode.

[0027] The coating roller includes a coating zone and a transition zone;

[0028] In each rotation cycle of the coating roller, the coating area is used to contact each bend; or, in multiple rotation cycles of the coating roller, the coating area is used to sequentially contact multiple positions of the bend, and the transition area is also used to contact a portion of the bend.

[0029] By adopting the above technical solution, the coating area can apply conductive adhesive to each curved section, thereby applying conductive adhesive to multiple curved sections. Furthermore, in some cases, the coating area can also apply conductive adhesive to multiple locations on the curved section.

[0030] In some embodiments, the adhesive coating area is used for the curved portion of the contact electrode, and the transition area is used for the straight portion of the contact electrode.

[0031] The coating roller includes multiple coating zones and multiple transition zones, which are alternately distributed circumferentially.

[0032] In each rotation cycle of the coating roller, multiple coating zones are used to contact multiple curved sections respectively; or, in each rotation cycle of the coating roller, multiple coating zones are used to contact multiple positions of the curved section in sequence, and a transition zone is also used to contact a portion of the curved section.

[0033] By adopting the above technical solution, multiple coating zones of the coating roller can be coordinated to apply conductive adhesive to multiple curved sections. Furthermore, in some cases, the multiple coating zones of the coating roller can be coordinated to apply conductive adhesive to multiple locations on the curved section.

[0034] In some embodiments, the electrode processing apparatus further includes a drying mechanism for drying the conductive adhesive on the electrode.

[0035] This design allows the conductive adhesive to penetrate the bent section more effectively, improving its flexibility and bonding strength, thus helping to mitigate the problem of cracking in the bent section.

[0036] Secondly, embodiments of this application provide a battery processing system, including an electrode processing apparatus.

[0037] The battery processing system provided in this application, by employing the electrode processing device described above, can roll-coat conductive adhesive onto the bent portion of the electrode. In this way, the conductive adhesive can penetrate into the bent portion, improving the bonding strength and flexibility of the bent portion, thereby mitigating the problem of cracking in the bent portion and improving the reliability of the resulting battery.

[0038] In some embodiments, the battery processing system further includes:

[0039] A winding device for winding electrode sheets to form electrode assemblies;

[0040] Assembly equipment used to assemble electrode assemblies into batteries.

[0041] By adopting the above technical solution, the electrode processing device first rolls conductive adhesive onto the curved part of the electrode, then winds the electrode coated with conductive adhesive into an electrode assembly using a winding device, and finally assembles the electrode assembly into a battery using an assembly device.

[0042] Thirdly, embodiments of this application provide an electrode processing method, applied to an electrode processing apparatus, the electrode processing method comprising:

[0043] The coating roller is driven to rotate by a drive mechanism, so that the coating area on the outer peripheral wall of the coating roller contacts the bent part of the electrode sheet.

[0044] The coating roller is driven to rotate by a drive mechanism, so that the transition area of ​​the outer peripheral wall of the coating roller contacts the flat part of the electrode sheet.

[0045] The electrode processing method provided in this application involves driving a coating roller to contact the bent portion of the electrode during processing, thereby applying conductive adhesive to the bent portion. This allows the conductive adhesive to penetrate the bent portion, improving its bonding strength and flexibility, thus mitigating cracking issues and enhancing the reliability of the resulting battery.

[0046] In some embodiments, the coating roller includes a coating area and a transition area; the coating roller is driven to rotate by a drive mechanism, causing the coating area on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, including:

[0047] During each rotation cycle of the coating roller, the coating area is driven to contact each curved part by the drive mechanism.

[0048] In this way, during each rotation cycle of the coating roller, the coating area can contact each bend to apply conductive adhesive to each bend, thereby enabling the coating area of ​​the coating roller to sequentially apply conductive adhesive to multiple bends of the electrode sheet.

[0049] In some embodiments, the coating roller includes a coating area and a transition area; the coating roller is driven to rotate by a drive mechanism, causing the coating area on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, including:

[0050] During multiple rotation cycles of the coating roller, the coating area is driven by the drive mechanism to sequentially contact multiple positions of the curved part;

[0051] Electrode processing methods also include:

[0052] During multiple rotation cycles of the coating roller, the transition zone is driven to contact a portion of the curved section via a drive mechanism.

[0053] With this configuration, during multiple rotation cycles of the coating roller, the coating area can sequentially contact multiple locations on the curved section to apply conductive adhesive to these locations at intervals. Furthermore, the coating area can apply conductive adhesive to multiple curved sections.

[0054] In some embodiments, the coating roller includes multiple coating areas and multiple transition areas, which are alternately distributed circumferentially; the coating roller is driven to rotate by a driving mechanism, causing the coating areas on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, including:

[0055] During each rotation cycle of the coating roller, the drive mechanism drives multiple coating zones to contact multiple curved sections respectively.

[0056] With this configuration, during each rotation cycle of the coating roller, multiple coating zones can contact multiple curved sections to apply conductive adhesive to them. In other words, multiple coating zones of the coating roller can work together to apply conductive adhesive to multiple curved sections.

[0057] In some embodiments, the coating roller includes multiple coating areas and multiple transition areas, which are alternately distributed circumferentially; the coating roller is driven to rotate by a driving mechanism, causing the coating areas on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, including:

[0058] During each rotation cycle of the coating roller, the drive mechanism drives multiple coating zones to sequentially contact multiple positions on the curved section.

[0059] Electrode processing methods also include:

[0060] During each rotation cycle of the coating roller, the transition zone is driven to contact a portion of the curved section via the drive mechanism.

[0061] This configuration allows multiple coating zones to sequentially contact multiple locations on the curved section during each rotation cycle of the coating roller, thereby applying conductive adhesive to these multiple locations. In other words, the multiple coating zones of the coating roller can cooperate to apply conductive adhesive to multiple curved sections. Furthermore, the multiple coating zones of the coating roller can cooperate to apply conductive adhesive to multiple locations on the curved section.

[0062] In some embodiments, a coating roller is driven to rotate by a drive mechanism, causing the coating area on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, including:

[0063] The glue-applying roller is driven to rotate by a drive mechanism, so that the glue-applying area contacts the curved part, and the rotational linear speed of the glue-applying roller is the same as the conveyor speed of the curved part.

[0064] In this way, during the process of the curved part contacting the coating area, the coating area can move synchronously with the curved part, which makes it easier for the coating area to apply the conductive adhesive roller to the curved part of the electrode sheet. This can improve the effect of the coating area in applying the conductive adhesive roller to the curved part and improve the problem of cracking in the curved part.

[0065] In some embodiments, after the coating roller is driven to rotate by a driving mechanism so that the coating area of ​​the outer peripheral wall of the coating roller contacts the curved portion of the electrode, and before the transition area of ​​the outer peripheral wall of the coating roller contacts the straight portion of the electrode, the method further includes:

[0066] The straight section of the adhesive application area is driven by a drive mechanism.

[0067] This configuration allows conductive adhesive to be applied to the connection points between the curved and straight sections, as well as the curved sections, through the adhesive application area, effectively improving the problem of electrode cracking.

[0068] In some embodiments, a coating roller is driven to rotate by a drive mechanism, causing the coating area on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, including:

[0069] The adhesive-coated area is driven by a drive mechanism to contact the electrode sheet with 3 to 5 bends in each electrode assembly.

[0070] By adopting the above technical solution, conductive adhesive can be rolled onto the first to third, first to fourth, or first to fifth bending portions of the electrode assembly, thereby improving the problem of electrode cracking and enhancing battery reliability.

[0071] Fourthly, embodiments of this application provide a battery including an electrode sheet, which is obtained by an electrode sheet processing apparatus or an electrode sheet processing method; the electrode sheet includes a straight portion and a curved portion connected to the straight portion, the curved portion being bent and having conductive adhesive on it.

[0072] The battery provided in this application embodiment improves the battery's reliability by providing conductive adhesive on the electrode sheets, which effectively reduces the problem of electrode cracking.

[0073] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0074] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0075] Figure 1 is an exploded view of a battery provided in some embodiments of this application;

[0076] Figure 2 is a schematic diagram of the electrode assembly of a battery provided in some embodiments of this application;

[0077] Figure 3 is a schematic diagram of the unfolded electrode plates of the electrode assembly provided in Figure 2;

[0078] Figure 4 is a schematic diagram of a battery processing system provided in some embodiments of this application;

[0079] Figure 5 is a three-dimensional structural diagram of the electrode processing apparatus and electrode provided in some embodiments of this application;

[0080] Figure 6 is a side view of Figure 5;

[0081] Figure 7 is a schematic diagram of the coating roller of the electrode processing device shown in Figure 5;

[0082] Figure 8 is a partial schematic diagram of the coating area of ​​the electrode processing apparatus provided in some embodiments of this application;

[0083] Figure 9 is a partial schematic diagram of the coating area of ​​an electrode processing apparatus provided in some other embodiments of this application;

[0084] Figure 10 is a schematic diagram of the coating roller of an electrode processing apparatus provided in some embodiments of this application;

[0085] Figure 11 is a flowchart of a battery processing method provided in some embodiments of this application;

[0086] Figure 12 is a flowchart of an electrode processing method provided in some other embodiments of this application;

[0087] Figure 13 is a flowchart of an electrode processing method provided in some embodiments of this application;

[0088] Figure 14 is a flowchart of an electrode processing method provided in some embodiments of this application.

[0089] In the figure, the following labels are used: 1000-Battery processing system; 100-Electrode processing device; 200-Winding device; 300-Assembly device; 10-Glue roller; 101-First side; 102-Second side; 103-Roller gap; 11-Glue application area; 111-Glue application section; 1111-Mesh pattern; 11111-Glue tank; 11112-Mesh wall; 12-Transition area; 20-Storage bin; 201-Opening; 30-Scraper; 40-Pressure roller; 2000-Battery; 2100-Battery cell; 2110-Electrode assembly; 2111-Electrode sheet; 21111-Bent section; 21112-Straight section; 21113-Glue layer; 2112-Separator; 2200-Box; 2210-First part; 2220-Second part; L-First axis; a-Straight section; b-Corner section; X-Circumferential direction; Y-Axial direction; Z-First direction. Detailed Implementation

[0090] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0091] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0092] Unless otherwise specified, all technical features and optional technical features of the embodiments of this application can be combined with each other to form new technical solutions.

[0093] In the description of the embodiments of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0094] Furthermore, the terms "first" and "second" are used 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 one or more of that feature.

[0095] In the description of the embodiments of this application, "multiple" means two or more, and unless otherwise explicitly specified, "two or more" includes two. Correspondingly, "multiple groups" means two or more groups, including two groups.

[0096] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "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. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0097] In the description of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three possibilities: A exists, A and B exist simultaneously, and B exists. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0098] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0099] In related technologies, a battery can be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, they are connected in series, parallel, or a hybrid configuration via a busbar. A hybrid configuration refers to multiple battery cells being connected in both series and parallel configurations.

[0100] A battery cell may include a housing assembly and an electrode assembly disposed within the housing assembly. The electrode assembly is the component in the battery cell in which an electrochemical reaction occurs.

[0101] In some cases, the electrode assembly is mainly formed by stacking and winding positive and negative electrode sheets, with a separator between the positive and negative electrode sheets. This results in the electrode assembly including a straight portion and two corner portions, with the two corner portions located at opposite ends of the straight portion. Specifically, the electrode sheet includes multiple straight portions and multiple curved portions, with the straight portions and curved portions alternating along the length of the electrode sheet. The electrode sheet can include either a positive or a negative electrode sheet. The straight portions of the positive and negative electrode sheets and part of the separator constitute the straight portion of the electrode assembly, while the curved portions of the positive and negative electrode sheets and part of the separator constitute the corner portions of the electrode assembly.

[0102] However, the bending design of the electrode makes it prone to cracking at the bending points, especially at the first to fifth bends. This affects the electrode's ability to extract and insert lithium ions and other conductive ions, thus impacting the charge-discharge cycle life of the battery cell and reducing its overall quality.

[0103] Based on the above considerations, embodiments of this application provide an electrode processing apparatus, a battery processing system, an electrode processing method, and a battery. The outer peripheral wall of a coating roller is used to contact the electrode, and this wall is divided into a circumferentially distributed coating area and a transition area. The coating area has a groove for holding conductive adhesive. During electrode processing, the coating area allows the conductive adhesive in the groove to be applied to the electrode. During electrode processing, the coating roller can be driven to rotate via a drive mechanism, causing the coating area to contact the curved portion of the electrode, allowing the conductive adhesive in the groove to be applied to the curved portion. Alternatively, the coating roller can be driven to rotate via a drive mechanism, causing the transition area to contact the straight portion of the electrode. In this way, the curved portion can be coated with conductive adhesive, which can penetrate into the curved portion, thereby improving the bonding strength and flexibility of the curved portion and mitigating the problem of cracking in the curved portion.

[0104] Please refer to Figures 1 to 3. Figure 1 is an exploded view of a battery 2000 provided in some embodiments of this application. Figure 2 is a schematic diagram of the electrode assembly 2110 of the battery 2000 provided in some embodiments of this application. In Figure 2, the straight portion a and the corner portion b of the electrode assembly 2110 are separated by dashed lines. Figure 3 is an unfolded schematic diagram of the electrode sheet 2111 of the electrode assembly 2110 provided in Figure 2. In Figure 3, the bent portion 21111 and the straight portion 21112 of the electrode sheet 2111 are separated by dashed lines. The battery 2000 provided in the embodiments of this application may include a battery cell 2100, and the battery cell 2100 includes one or more electrode assemblies 2110.

[0105] A battery cell 2100 refers to the smallest unit that stores and outputs electrical energy. The battery cell 2100 can be a secondary battery 2000 or a primary battery 2000. The battery cell 2100 can be, but is not limited to, a metal battery 2000, a lithium-sulfur battery 2000, a sodium-ion battery 2000, or a magnesium-ion battery 2000. The battery cell 2100 can be cylindrical, flat, cuboid, or other shapes.

[0106] The electrode assembly 2110 is mainly formed by stacking and winding positive and negative electrode sheets, with a separator 2112 between them. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 2110, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The tab of the positive electrode sheet is called the positive tab, and the tab of the negative electrode sheet is called the negative tab. The positive and negative tabs can be located together at one end of the main body or at opposite ends of the main body.

[0107] As shown in Figure 2, the electrode assembly 2110 includes a straight portion a and two corner portions b, which are respectively located at opposite ends of the straight portion a. As shown in Figures 2 and 3, the electrode 2111 includes multiple straight portions 21112 and multiple curved portions 21111, which are alternately distributed along the length of the electrode 2111. The electrode 2111 may include a positive electrode or a negative electrode. The straight portions 21112 of the positive electrode, the straight portions 21112 of the negative electrode, and a portion of the diaphragm 2112 constitute the straight portion a of the electrode assembly 2110, while the curved portions 21111 of the positive electrode, the curved portions 21111 of the negative electrode, and a portion of the diaphragm 2112 constitute the corner portions b of the electrode assembly 2110.

[0108] In some embodiments, the battery cell 2100 may further include an electrolyte, which acts as a conductor of ions between the positive and negative electrode plates. The electrolyte described in this application embodiment may be liquid, gel-like, or solid.

[0109] In some embodiments, the battery cell 2100 may further include a housing assembly for defining the internal environment of the battery cell 2100 and for accommodating the electrode assembly 2110 and the electrolyte.

[0110] The housing assembly may include a housing and end caps, which are components used to jointly define the internal environment of the battery cell 2100. The internal environment defined by the housing and end caps is used to accommodate the electrode assembly 2110 and the electrolyte. The housing and end caps can be independent components. Specifically, the housing has an opening 201, and the end cap is disposed at the opening 201 of the housing to jointly define the internal environment of the battery cell 2100 and isolate the internal environment of the battery cell 2100 from the external environment. Alternatively, the housing and end caps can be an integrated structure. Specifically, the end caps and housing can form a common connection surface before the electrode assembly 2110 is inserted into the housing. After the electrode assembly 2110 is inserted into the housing, and when it is necessary to encapsulate the electrode assembly 2110, the end cap closes the housing.

[0111] The number of end caps can be one. Alternatively, the number of end caps can be two, with the two end caps located at opposite ends of the housing.

[0112] The housing can be cylindrical, square, or other shapes, depending on the specific shape and size of the electrode assembly 2110. Furthermore, the materials used for the housing and end caps can be varied, including copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0113] In some embodiments, the battery 2000 can be a battery module. When there are multiple battery cells 2100, the multiple battery cells 2100 are arranged and fixed to form a battery module.

[0114] In some embodiments, as shown in FIG1, the battery 2000 can be a battery pack. Specifically, the battery 2000 also includes a housing 2200, which is a structure with an internal space for accommodating individual battery cells 2100.

[0115] The housing 2200 can adopt various structures. In some embodiments, the housing 2200 may include a first portion 2210 and a second portion 2220, which overlap each other and jointly define the internal space of the housing 2200. The first portion 2210 may be a hollow structure with an opening 201 at one end, and the second portion 2220 may be a plate-like structure, covering the opening 201 side of the first portion 2210, so that the first portion 2210 and the second portion 2220 jointly define the internal space of the housing 2200. Alternatively, referring to Figure 1, both the first portion 2210 and the second portion 2220 may be hollow structures with an opening 201 at one end, with the opening 201 side of the first portion 2210 covering the opening 201 side of the second portion 2220, so that the first portion 2210 and the second portion 2220 jointly define the internal space of the housing 2200. The box 2200, which is composed of the first part 2210 and the second part 2220, can be of various shapes, such as cylinder, cuboid, etc.

[0116] In some embodiments, as shown in FIG1, multiple battery cells 2100 can be connected in series, parallel, or mixed to form a whole, and then the whole formed by the multiple battery cells 2100 is directly housed in the internal space of the housing 2200. In other embodiments, multiple battery cells 2100 can also be connected in series, parallel, or mixed first, and arranged and fixed to form a battery module, and the battery module is housed in the internal space of the housing 2200. In still other embodiments, multiple battery cells 2100 can also be connected in series, parallel, or mixed first, and arranged and fixed to form multiple battery modules, and the multiple battery modules can then be connected in series, parallel, or mixed to form a whole, and housed in the internal space of the housing 2200.

[0117] As an example, multiple battery cells 2100 can be fixed together to form a battery module using cable ties or similar means. As another example, multiple battery cells 2100 can also be fixed together to form a battery module using end plates, side plates, or similar means.

[0118] Please refer to Figure 4, which is a schematic diagram of a battery processing system 1000 provided in some embodiments of this application. The battery processing system 1000 provided in the embodiments of this application refers to equipment used for processing to obtain a battery 2000.

[0119] The battery processing system 1000 may include an electrode processing device 100.

[0120] The electrode processing apparatus 100 provided in this application embodiment refers to an apparatus for processing to obtain an electrode 2111. Specifically, the electrode processing apparatus 100 is mainly used to roll-coat conductive adhesive onto the bent portion 21111 of the electrode 2111 to improve the problem of cracking in the bent portion 21111 of the electrode 2111.

[0121] Please refer to Figures 5 through 9, and in conjunction with other accompanying drawings. Figure 5 is a perspective view of the electrode processing apparatus 100 and electrode 2111 provided in some embodiments of this application. Figure 6 is a side view of Figure 5, specifically a schematic diagram of the electrode processing apparatus 100 and electrode 2111 along the axial Y-axis of the coating roller 10. Figure 7 is a schematic diagram of the coating roller 10 of the electrode processing apparatus 100 provided in Figure 5, specifically a schematic diagram of the coating roller 10 along the axial Y-axis. In Figure 7, the coating area 11 and transition area 12 of the coating roller 10 are separated by dashed lines. Figure 8 is a partial schematic diagram of the coating area 11 of the electrode processing apparatus 100 provided in some embodiments of this application, and Figure 9 is a partial schematic diagram of the coating area 11 of the electrode processing apparatus 100 provided in other embodiments of this application. The electrode processing apparatus 100 provided in the embodiments of this application includes a coating roller 10 and a drive mechanism. The outer peripheral wall of the coating roller 10 is used to contact the electrode 2111. The outer peripheral wall of the coating roller 10 includes a coating area 11 and a transition area 12 distributed along the circumferential direction X. The coating area 11 is provided with a glue groove 11111 for containing conductive glue. The coating area 11 is used to apply the conductive glue in the glue groove 11111 onto the electrode 2111 when in contact with the electrode 2111. A drive mechanism is used to drive the coating roller 10 to rotate.

[0122] The coating roller 10 is a roller-shaped structure in the electrode processing device 100 used to apply conductive adhesive to the electrode 2111. The electrode 2111 can be either a positive electrode or a negative electrode.

[0123] The drive mechanism refers to the mechanism used to drive the coating roller 10 to rotate. The drive mechanism may include a motor, or a mechanism that combines a motor and a gear set.

[0124] Understandably, the glue-applying roller 10 is connected to the output end of the drive mechanism and can rotate under the drive of the drive mechanism. When the drive mechanism drives the glue-applying roller 10 to rotate, the glue-applying roller 10 can rotate around its own central axis. For ease of description, the central axis of the glue-applying roller 10 is defined as the first axis L. The rotational setting of the glue-applying roller 10 means that the glue-applying roller 10 can rotate around the first axis L.

[0125] The outer peripheral wall of the glue-applying roller 10 refers to the outer peripheral wall of the glue-applying roller 10 around the first axis L. The outer peripheral wall of the glue-applying roller 10 is a solid wall, and it is approximately cylindrical.

[0126] Wherein, the extension direction of the first axis L is the axial direction Y of the glue-applying roller 10. In the following text, for ease of description, the axial direction Y of the glue-applying roller 10 will be simply referred to as axial Y.

[0127] Circumferential direction X refers to the circumferential direction, which is the direction of the outer peripheral wall of the coating roller 10, and is approximately perpendicular to the axial direction Y.

[0128] Radial direction refers to the radius of the circle containing the cylindrical structure defined by the outer peripheral wall of the coating roller 10, which is approximately perpendicular to the axial direction Y.

[0129] Understandably, the electrode 2111 can pass through the coating roller 10 during the conveyor belt process, so that the outer peripheral wall of the coating roller 10 contacts the electrode 2111.

[0130] In some possible designs, when the electrode 2111 passes through the coating roller 10 during the conveyor belt process, the electrode 2111 can make contact with the outer peripheral wall of the coating roller 10. Based on this, the portion of the electrode 2111 that contacts the outer peripheral wall of the coating roller 10 can be conveyed along the tangential direction of the position of contact between the electrode 2111 and the coating roller 10. For example, when the electrode 2111 passes through the coating roller 10, the electrode 2111 extends in a straight line, and the electrode 2111 is tangentially arranged to the outer peripheral wall of the coating roller 10, so that the electrode 2111 and the outer peripheral wall of the coating roller 10 make contact.

[0131] In some other possible designs, as the electrode 2111 passes over the coating roller 10 during the conveyor belt process, the electrode 2111 can contact the outer peripheral wall of the coating roller 10. Specifically, the electrode 2111 is bent and wraps around the outer peripheral wall of the coating roller 10 to contact the outer peripheral wall of the coating roller 10, thus making contact between the electrode 2111 and the outer peripheral wall of the coating roller 10. Based on this, the portion of the electrode 2111 that contacts the outer peripheral wall of the coating roller 10 can be conveyed circumferentially along the position of the electrode 2111 on the coating roller 10.

[0132] The coating area 11 and the transition area 12 are two regions on the outer peripheral wall of the coating roller 10, which can be understood as two solid parts on the outer peripheral wall of the coating roller 10. The outer peripheral wall of the coating roller 10 contacts the electrode 2111, and when the coating roller 10 rotates under the drive of the drive mechanism, the coating area 11 and the transition area 12 of the coating roller 10 can alternately contact the electrode 2111.

[0133] The adhesive groove 11111 refers to a groove used to hold conductive adhesive.

[0134] During operation, the coating roller 10 of the electrode processing apparatus 100 can rotate under the drive of the drive mechanism, so that the coating area 11 and the transition area 12 of the coating roller 10 alternately contact the electrode 2111. When the coating area 11 contacts the electrode 2111, the conductive adhesive roller in the adhesive groove 11111 on the coating area 11 is applied to the electrode 2111.

[0135] In practical applications, the coating area 11 can be used to contact the bent portion 21111 of the electrode 2111, so that the conductive adhesive roller in the adhesive tank 11111 can apply the adhesive to the bent portion 21111. The transition area 12 can be used to contact the straight portion 21112 of the electrode 2111, so as to facilitate the contact of the next bent portion 21111 of the electrode 2111 with the coating area 11.

[0136] The adhesive application area 11 is used to contact the curved portion 21111, meaning that at least a portion of the adhesive application area 11 is used to contact at least a portion of the curved portion 21111. The transition area 12 is used to contact the straight portion 21112, meaning that at least a portion of the transition area 12 is used to contact at least a portion of the straight portion 21112.

[0137] Understandably, in some possible designs, in the curved portion 21111 and the straight portion 21112 of the electrode 2111, the adhesive coating area 11 is only used to contact the curved portion 21111 of the electrode 2111, and not the straight portion 21112 of the electrode 2111, so that the conductive adhesive is only rolled onto the curved portion 21111. Based on this, the transition area 12 can be used to contact only the straight portion 21112 of the electrode 2111, and not the curved portion 21111, so as to transition only the straight portion 21112; or it can be used to contact the straight portion 21112 and part of the curved portion 21111, so as to transition the straight portion 21112 and part of the curved portion 21111.

[0138] In some other possible designs, the adhesive coating area 11 in the curved portion 21111 and the straight portion 21112 of the electrode 2111 can be used not only to contact the curved portion 21111 of the electrode 2111, but also to contact the part of the straight portion 21112 of the electrode 2111, so that conductive adhesive can be rolled onto the curved portion 21111 and the part of the straight portion 21112. For example, but not limited to, conductive adhesive can be rolled onto the connection position between the curved portion 21111 and the straight portion 21112, or onto the curved portion 21111. Based on this, the transition area 12 can be used to contact only the part of the straight portion 21112 without contacting the curved portion 21111, so as to transition only the part of the straight portion 21112; or it can be used to contact both the part of the straight portion 21112 and the part of the curved portion 21111, so as to transition between the part of the straight portion 21112 and the part of the curved portion 21111.

[0139] During operation, the coating roller 10 rotates around the first axis L under the drive of the drive mechanism, and the electrode 2111 contacts the outer peripheral wall of the coating roller 10. By controlling the rotational speed of the coating roller 10 and the conveyor speed of the electrode 2111, at least a portion of the first straight portion 21112 of the electrode 2111 can contact the transition region 12 of the coating roller 10, causing the transition region 12 to transition over at least a portion of the first straight portion 21112; then, the first curved portion 21111 of the electrode 2111 contacts the coating region 11 of the coating roller 10, causing the coating region 11 to roll-coat conductive adhesive onto the first curved portion 21111; then, at least a portion of the second straight portion 21112 of the electrode 2111 contacts the transition region 12, causing the transition region 12 to transition over at least a portion of the second straight portion 21112; then, the second curved portion 21111 of the electrode 2111 contacts the coating region 11, causing the coating region 11 to roll-coat conductive adhesive onto the second curved portion 21111... and so on.

[0140] Specifically, when the curved portion 21111 of the electrode 2111 contacts the coating area 11 of the coating roller 10, the coating area 11 applies conductive adhesive to the surface of the curved portion 21111. When the partially straight portion 21112 of the electrode 2111 contacts the coating area 11, the coating area 11 applies conductive adhesive to the surface of the partially straight portion 21112. When the straight portion 21112 of the electrode 2111 contacts the transition area 12, the transition area 12 buffers the transition straight portion 21112. When the partially curved portion 21111 of the electrode 2111 contacts the transition area 12, the transition area 12 buffers the transition portion of the transition area 12.

[0141] In the case where the bending portion 21111 and the partially straight portion 21112 can be contacted in the coating area 11 to roll-coat conductive adhesive to the bending portion 21111 and the partially straight portion 21112, during the operation of the electrode processing apparatus 100, after the straight portion 21112 contacts the transition area 12, before the bending portion 21111 contacts the coating area 11, a portion of the straight portion 21112 can contact the coating area 11 to roll-coat conductive adhesive through the coating area 11.

[0142] When controlling the rotation speed of the coating roller 10 and the conveyor speed of the electrode 2111, the rotation speed of the coating roller 10 can be controlled based solely on the conveyor speed of the electrode 2111, or the conveyor speed of the electrode 2111 can be controlled based solely on the rotation speed of the coating roller 10, or the rotation speed of the coating roller 10 and the conveyor speed of the electrode 2111 can be controlled separately.

[0143] For ease of description, one side of the coating roller 10 along the first direction Z can be defined as the first side 101. The coating roller 10 is used to contact the electrode 2111 on the first side 101, that is, during the conveying process, at least a portion of the electrode 2111 is located on the first side 101 of the coating roller 10. By controlling the rotation speed of the coating roller 10 and the conveying speed of the electrode 2111, it is possible to make the electrode 2111 gradually contact the outer peripheral wall of the coating roller 10 on the first side 101 as the coating roller 10 rotates and the electrode 2111 conveys to the first side 101.

[0144] The coating area 11 of the coating roller 10 is used to contact the bent portion 21111 of the electrode 2111 on the first side 101. Specifically, by controlling the rotation speed of the coating roller 10 and the conveying speed of the electrode 2111, when the bent portion 21111 of the electrode 2111 is conveyed to the first side 101, the coating area 11 on the outer peripheral wall of the coating roller 10 can also rotate to the first side 101, so that the bent portion 21111 can gradually contact the coating area 11 on the first side 101 as the coating roller 10 rotates and the electrode 2111 is conveyed.

[0145] The transition zone 12 of the coating roller 10 is used to contact the straight portion 21112 of the electrode 2111 on the first side 101. Specifically, when the straight portion 21112 of the electrode 2111 travels to the first side 101, the transition zone 12 of the outer peripheral wall of the coating roller 10 can also rotate to the first side 101, so that the straight portion 21112 can gradually contact the transition zone 12 on the first side 101 as the coating roller 10 rotates and the electrode 2111 travels.

[0146] Here, the first side 101 refers to the position of the contact electrode 2111 of the coating roller 10, which can be a roughly virtual position and will not change with the rotation of the coating roller 10. The first direction Z refers to the approximate direction of the coating roller 10 with the first side 101.

[0147] In this configuration, the rotation direction of the coating roller 10 on the first side 101 is approximately the same as the belt travel direction of the electrode 2111 on the first side 101. As an example, as shown in Figures 5 to 7, the first side 101 is located above the coating roller 10, and the rotation direction of the coating roller 10 is clockwise, so that the rotation direction of the coating roller 10 on the first side 101 is approximately to the right, and the belt travel direction of the electrode 2111 is approximately to the right.

[0148] The first direction Z intersects the axial direction Y of the coating roller 10, meaning that the first direction Z and the axial direction Y can form an angle greater than 0° and less than 180°, that is, the first direction Z and the axial direction Y are not parallel. The first direction Z and the axial direction Y can be perpendicular to each other or not perpendicular. The first direction Z and the axial direction Y can be directions intersecting on the same plane, or they can be directions on planes that are skew to each other, and the projection of the axial direction Y onto the plane containing the first direction Z can intersect the first direction Z. As an example, the first direction Z and the axial direction Y are perpendicular, and the first direction Z is parallel to one of the radial directions of the coating roller 10.

[0149] The electrode processing apparatus 100 provided in this application embodiment uses the outer peripheral wall of a coating roller 10 to contact the electrode 2111. The outer peripheral wall of the coating roller 10 is divided into a coating area 11 and a transition area 12 distributed along the circumferential direction X. The coating area 11 is provided with a glue groove 11111 for containing conductive glue. During the processing of the electrode 2111, the coating roller 10 can be driven to rotate by a drive mechanism so that the coating area 11 contacts the bent portion 21111 of the electrode 2111, and the conductive glue in the glue groove 11111 on the coating area 11 is rolled onto the bent portion 21111. In this way, conductive glue can be rolled onto the bent portion 21111, and the conductive glue can penetrate into the bent portion 21111, thereby improving the bonding strength and flexibility of the bent portion 21111, thus improving the problem of cracking of the bent portion 21111, and improving the reliability of the obtained battery 2000.

[0150] In addition, by setting up the coating roller 10, conductive adhesive can be applied to the bent portion 21111 of the electrode 2111 during the rotation of the coating roller 10, making the coating operation of the electrode 2111 very simple, easy to implement, time-saving and labor-saving, and helping to improve the processing efficiency of the battery 2000.

[0151] It should be noted that after the electrode processing apparatus 100 rolls conductive adhesive onto the bent portion 21111 of the electrode 2111, the conductive adhesive solidifies on the bent portion 21111 to form an adhesive layer 21113, so as to obtain the electrode 2111 shown in Figure 3.

[0152] In some embodiments, please refer to Figures 5 to 9 together, and in conjunction with other figures. The adhesive application area 11 is provided with a mesh pattern 1111, which surrounds and forms a plurality of adhesive grooves 11111.

[0153] The net pattern 1111, also known as the mesh pattern, checkered pattern, or grid pattern, is the result of a pattern composed of dots, lines, and combinations of dots and lines of a certain shape and size arranged in a certain way. Among them, the net pattern 1111 resembles a fishing net.

[0154] The mesh pattern 1111 includes mesh walls 11112 and mesh cells, with mesh walls 11112 between adjacent mesh cells. Understandably, the mesh walls 11112 are the patterns of the mesh pattern 1111, and the mesh walls 11112 enclose and form mesh cells. The mesh cells are adhesive grooves 11111.

[0155] The adhesive coating area 11 can be formed into a mesh pattern 1111 by means of engraving, but is not limited to engraving.

[0156] By adopting the above technical solution, the multiple adhesive grooves 11111 formed by the mesh pattern 1111 are used to hold conductive adhesive. In this way, the mesh walls 11112 of the mesh pattern 1111 can limit the conductive adhesive in the adhesive grooves 11111 to a certain extent, which can improve the problem of the conductive adhesive in the adhesive grooves 11111 being thrown out during the rotation of the coating roller 10, thereby improving the coating effect of the bent portion 21111 and improving the cracking problem of the bent portion 21111.

[0157] The glue tank 11111 can have various shapes. In some embodiments, as shown in FIG8, the glue tank 11111 is polygonal, such as a regular hexagon or a square. In other embodiments, as shown in FIG9, the glue tank 11111 is circular.

[0158] In some embodiments, please refer to Figures 5 to 7 together with other figures. The electrode processing apparatus 100 also includes a storage bin 20 for storing conductive adhesive. At least a portion of the coating roller 10 is located within the storage bin 20 for the adhesive tank 11111 to draw conductive adhesive from the storage bin 20.

[0159] Storage bin 20 refers to a containment structure used to store conductive adhesive.

[0160] At least a portion of the coating roller 10 is located within the storage hopper 20. This can be either a partial or complete location of the coating roller 10 within the storage hopper 20. Specifically, a portion of the coating roller 10 is below the liquid surface in the storage hopper 20, and another portion is above the liquid surface in the storage hopper 20.

[0161] In this way, during the rotation of the coating roller 10, the coating area 11 can rotate below the liquid surface of the storage bin 20, allowing the adhesive trough 11111 of the coating area 11 to collect the conductive adhesive from the storage bin 20. After collecting the conductive adhesive, the coating area 11 can rotate to the first side 101, that is, rotate above the liquid surface of the storage bin 20, to contact the bent portion 21111 of the electrode 2111, thereby applying the conductive adhesive from the adhesive trough 11111 onto the bent portion 21111. Thus, the coating area 11 can apply the conductive adhesive from the storage bin 20 onto the bent portion 21111.

[0162] In addition, the storage bin 20 allows the coating roller 10 to pick up conductive adhesive during rotation and apply it to the bent portion 21111 of the electrode 2111, which simplifies the processing of the electrode 2111 and improves the processing efficiency of the electrode 2111, thereby improving the processing efficiency of the battery 2000.

[0163] In some embodiments, please refer to Figures 5 to 7 together with other figures. The coating roller 10 has a first side 101 and a second side 102 opposite each other along a first direction Z, the first direction Z intersecting the axial direction Y. The coating roller 10 is used to contact the electrode 2111 on the first side 101. At least a portion of the storage bin 20 is located on the second side 102. The electrode processing apparatus 100 also includes a scraper 30, which is disposed on the path of rotation of the outer peripheral wall of the coating roller 10 from the second side 102 toward the first side 101, and is used to abut against the outer peripheral wall of the coating roller 10. The coating roller 10 is used to rotate relative to the scraper 30.

[0164] The first side 101 refers to the position of the coating roller 10 that contacts the electrode 2111, and the second side 102 refers to the position opposite to the first side 101. Both the first side 101 and the second side 102 can be approximate virtual positions and will not change with the rotation of the coating roller 10. Correspondingly, the first direction Z is the approximate distribution direction of the first side 101 and the second side 102.

[0165] The coating roller 10 is used to contact the electrode 2111 on the first side 101, such that the coating area 11 of the coating roller 10 can contact the curved portion 21111 of the electrode 2111 on the first side 101, and the transition area 12 of the coating roller 10 can contact the straight portion 21112 of the electrode 2111 on the first side 101.

[0166] At least a portion of the storage hopper 20 is located on the second side 102, and at least a portion of the outer peripheral wall of the coating roller 10 is located inside the storage hopper 20, such that in the first direction Z, at least a portion of the coating roller 10 away from the first side 101 is located inside the storage hopper 20. Specifically, in the first direction Z, the storage hopper 20 has an opening 201 on the side facing the coating roller 10, and at least a portion of the coating roller 10 away from the first side 101 extends into the storage hopper 20 through the opening 201. The portion of the coating roller 10 away from the first side 101 is below the liquid surface of the storage hopper 20, and the portion of the coating roller 10 near the first side 101 is above the liquid surface of the storage hopper 20.

[0167] The scraper 30 refers to a component used to scrape away conductive adhesive from the outer peripheral wall of the coating roller 10, excluding the adhesive groove 11111. The scraper 30 may be, but is not limited to, a silicone or rubber component. The other locations on the outer peripheral wall of the coating roller 10, excluding the adhesive groove 11111, include the transition zone 12, and may also include other locations in the coating area 11, excluding the adhesive groove 11111.

[0168] The scraper 30 is disposed on the path of the outer peripheral wall of the coating roller 10 as it rotates from the second side 102 toward the first side 101. Specifically, in the first direction Z, the scraper 30 is disposed between the first side 101 and the second side 102, and on the path of the outer peripheral wall of the coating roller 10 as it rotates from the second side 102 to the first side 101. In this way, the coating area 11 and the transition area 12 of the coating roller 10 can be rotated sequentially to the second side 102, the scraper 30, and the first side 101.

[0169] As an example, as shown in Figures 5 and 6, in the first direction Z, the storage bin 20 is located on the second side 102 of the coating roller 10. The portion of the coating roller 10 near the second side 102 is located inside the storage bin 20, and the portion of the coating roller 10 near the first side 101 is located outside the storage bin 20, such that the first side 101 is the side of the coating roller 10 away from the storage bin 20 along the first direction Z. Furthermore, the scraper 30 is located between the storage bin 20 and the first side 101, and is positioned on the path of the coating roller 10 as it rotates from the second side 102 to the first side 101.

[0170] By adopting the above technical solution, during the rotation of the coating roller 10, the coating area 11 of the coating roller 10 can first rotate to the second side 102 to rotate below the liquid surface of the storage bin 20, so that the glue tank 11111 of the coating area 11 can obtain the conductive glue in the storage bin 20; then, the coating area 11 of the coating roller 10 rotates to the scraper 30; then, the coating area 11 of the coating roller 10 rotates to the first side 101, so as to contact the electrode 2111 on the first side 101, so as to apply the conductive glue to the curved portion 21111 of the electrode 2111. In this process, conductive adhesive is obtained from the adhesive groove 11111 in the adhesive coating area 11. During the rotation from the second side 102 to the first side 101, the adhesive coating roller 10 moves relative to the scraper 30, allowing the scraper 30 to scrape off the conductive adhesive from the outer peripheral wall of the adhesive coating roller 10 except for the adhesive groove 11111. This prevents conductive adhesive from being applied to the electrode sheet 2111 at other locations on the outer peripheral wall of the adhesive coating roller 10. For example, when the transition area 12 of the adhesive coating roller 10 rotates to the first side 101, since the conductive adhesive in the transition area 12 has been scraped off by the scraper 30, the conductive adhesive will not be applied to the flat portion 21112 of the electrode sheet 2111 when the transition area 12 contacts the flat portion 21112.

[0171] In this way, the problem of large volume and weight of electrode 2111 caused by the coating roller 10 applying conductive adhesive to the curved part 21111 and the straight part 21112 of electrode 2111 can be improved, which helps to improve the energy density of battery 2000.

[0172] In some embodiments, please refer to Figures 5 to 7 together with other figures. The electrode processing apparatus 100 also includes a pressure roller 40, the outer peripheral wall of the pressure roller 40 and the outer peripheral wall of the coating roller 10 forming a roller coating gap 103 for the electrode 2111 to pass through, and the coating area 11 is used to cooperate with the pressure roller 40 to apply conductive adhesive to the electrode 2111 passing through the roller coating gap 103.

[0173] The pressure roller 40 refers to a roller-shaped structure used to press the electrode 2111 onto the outer peripheral wall of the coating roller 10, so as to roll the electrode 2111 together with the outer peripheral wall of the coating roller 10.

[0174] The pressure roller 40 is disposed on one side of the coating roller 10 along the radial direction. The pressure roller 40 and the coating roller 10 are parallel to each other and are distributed at intervals along the radial direction of the coating roller 10, such that the outer peripheral wall of the pressure roller 40 and the outer peripheral wall of the coating roller 10 form a roller coating gap 103. Specifically, the pressure roller 40 is disposed on the first side 101 of the coating roller 10, and the outer peripheral wall of the pressure roller 40 and the outer peripheral wall of the coating roller 10 form a roller coating gap 103 at intervals on the first side 101.

[0175] Specifically, the coating area 11 is used to cooperate with the pressure roller 40 to apply conductive adhesive to the curved portion 21111 passing through the roller coating gap 103.

[0176] By adopting the above technical solution, when the electrode 2111 is conveyed to the first side 101, the electrode 2111 passes through the coating gap 103, and the pressure roller 40 presses the electrode 2111 at the coating gap 103 onto the outer peripheral wall of the coating roller 10, so that the coating roller 10 and the pressure roller 40 jointly roll the electrode 2111. Based on this, when the bent portion 21111 of the electrode 2111 is conveyed to the first side 101, the bent portion 21111 passes through the coating gap 103, and bypasses and contacts the coating area 11 of the coating roller 10. The bent portion 21111 presses against the coating area 11 and the outer peripheral wall of the pressure roller 40, which can improve the effect of the coating area 11 in applying conductive adhesive to the bent portion 21111, thereby improving the cracking problem of the electrode 2111.

[0177] In some embodiments, the pressure roller 40 is configured to rotate, and the axis of rotation of the pressure roller 40 is parallel to the first axis L. Thus, when the electrode 2111 is conveyed to the first side 101 to pass through the coating gap 103, the pressure roller 40 can rotate with the electrode 2111, thereby improving the conveying flexibility of the electrode 2111 and increasing the flexibility of the electrode processing apparatus 100 in applying conductive adhesive to the curved portion 21111 of the electrode 2111.

[0178] The rotation direction of the pressure roller 40 can be opposite to that of the coating roller 10.

[0179] In some embodiments, please refer to Figures 5 to 7 together, and in conjunction with other figures. The glue application area 11 includes at least one set of glue application sections 111, and glue grooves 11111 are disposed on the glue application sections 111. Each set of glue application sections 111 extends along the axial direction Y of the glue application roller 10.

[0180] The coating section 111 refers to the part of the coating area 11 used to apply conductive adhesive rollers to the curved section 21111.

[0181] A group of adhesive application sections 111 may include at least one adhesive application section 111. When a group of adhesive application sections 111 includes one adhesive application section 111, the adhesive application section 111 of the group of adhesive application sections 111 extends along the axial direction Y. When a group of adhesive application sections 111 includes multiple adhesive application sections 111, the multiple adhesive application sections 111 of the group are distributed along the axial direction Y, such that the group of adhesive application sections 111 extends along the axial direction Y.

[0182] The electrode 2111 is roughly square in shape and has a length direction and a width direction. The length direction of the electrode 2111 is roughly the same as the direction in which the electrode 2111 travels at the roller coating gap 103, and the width direction of the electrode 2111 is perpendicular to the length direction of the electrode 2111 and parallel to the axial direction Y.

[0183] By extending along the axial direction Y by each group of adhesive application sections 111, the conductive adhesive can be applied to a larger area of ​​the bent portion 21111 along its width direction, thereby effectively improving the cracking problem of the bent portion 21111.

[0184] In some embodiments, the width of the adhesive coating portion 111 along the circumferential direction X ranges from 3mm to 12mm, specifically 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, etc.

[0185] This configuration allows the coating section 111 to apply a wider layer of conductive adhesive to the bent section 21111, thereby helping to improve the problem of cracking of the electrode sheet 2111.

[0186] In some embodiments, the radial depth of the adhesive groove 11111 ranges from 30μm to 180μm, specifically 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, etc.

[0187] This design makes the radial depth of the adhesive groove 11111 suitable, which can not only accommodate the conductive adhesive, but also facilitate the application of the conductive adhesive to the bent portion 21111 by the adhesive groove 11111. This helps the electrode processing device 100 to apply the conductive adhesive to the bent portion 21111, thereby improving the problem of electrode 2111 cracking.

[0188] In some embodiments, please refer to FIG5, and in conjunction with other figures. When the adhesive application portion 111 is provided in multiple groups, the multiple groups of adhesive application portions 111 are distributed at intervals along the circumferential direction X.

[0189] This configuration allows the coating area 11 to include multiple coating sections 111, enabling the multiple coating sections 111 to apply conductive adhesive to multiple locations along the circumferential X direction of the bent portion 21111. This improves the cracking problem of the bent portion 21111 and reduces the amount of conductive adhesive used, thus helping to increase the energy density of the battery 2000.

[0190] In some embodiments, the drive mechanism is used to adjust the rotational speed of the coating roller 10 when it contacts the electrode 2111 in the coating area 11 and the rotational speed when it contacts the electrode 2111 in the transition area 12.

[0191] Specifically, the drive mechanism is used to adjust the rotation speed of the coating roller 10 when it contacts the curved portion 21111 in the coating area 11 and the rotation speed when it contacts the straight portion 21112 in the transition area 12.

[0192] By adopting the above technical solution, when the transition zone 12 contacts the straight portion 21112 of the electrode 2111, the drive mechanism can adjust the rotation speed of the coating roller 10, so that the transition zone 12 can buffer the straight portion 21112, facilitating the subsequent contact of the coating zone 11 with the curved portion 21111 of the electrode 2111. When the coating zone 11 contacts the curved portion 21111, the drive mechanism can adjust the rotation speed of the coating roller 10, that is, adjust the rotational linear speed of the coating zone 11. On the one hand, this allows the coating zone 11 to stably apply conductive adhesive to the curved portion 21111, and on the other hand, it facilitates the subsequent contact of the transition zone 12 with the straight portion 21112.

[0193] This configuration facilitates the contact of the transition zone 12 with the straight portion 21112 of the electrode 2111, and also facilitates the contact of the adhesive coating zone 11 with the bent portion 21111 of the electrode 2111, so as to roll-coat the bent portion 21111 with conductive adhesive.

[0194] During the process of the coating zone 11 contacting the curved portion 21111 of the electrode 2111, the rotation speed of the coating roller 10 can be the same as or different from the conveyor belt speed of the electrode 2111. During the process of the transition zone 12 contacting the straight portion 21112 of the electrode 2111, the rotation speed of the coating roller 10 can be the same as or different from the conveyor belt speed of the electrode 2111.

[0195] During the process of the coating area 11 contacting different curved portions 21111, the rotation speed of the coating roller 10 can be the same or different. As an example, with the belt speed constant, the rotation speed of the coating roller 10 can be different during the process of the coating area 11 contacting different curved portions 21111, so that the coating area 11 can contact curved portions 21111 of different lengths.

[0196] During the process of the transition zone 12 contacting different straight sections 21112, the rotation speed of the coating roller 10 can be the same or different. As an example, with the belt speed constant, the rotation speed of the coating roller 10 can be different during the process of the transition zone 12 contacting different straight sections 21112, so that the transition zone 12 can contact straight sections 21112 of different lengths.

[0197] It should be noted that the rotation cycle of the coating roller 10 refers to the time it takes for the coating roller 10 to rotate one revolution, that is, the time it takes for the coating roller 10 to rotate 360°. Specifically, the rotation cycle of the coating roller 10 can be the time it takes for the coating area 11 to start rotating from the first side 101 until it rotates back to the first side 101.

[0198] In some embodiments, please refer to Figures 5 to 7 together with other figures. The coating area 11 is used to contact the curved portion 21111 of the electrode 2111, and the transition area 12 is used to contact the straight portion 21112 of the electrode 2111. The coating roller 10 includes a coating area 11 and a transition area 12, which are distributed along the circumferential direction X.

[0199] In some possible designs, during each rotation cycle of the coating roller 10, the coating area 11 is used to contact each bend 21111.

[0200] Understandably, for each revolution of the coating roller 10, the coating area 11 rotates to the first side 101 once and contacts a bent portion 21111 of the electrode 2111 to roll-coat conductive adhesive onto the bent portion 21111 of the electrode 2111.

[0201] Specifically, during the operation of the electrode processing apparatus 100, the coating roller 10 rotates for the first revolution, and the coating area 11 rotates to the first side 101 for the first time, contacting the first curved portion 21111 of the electrode 2111 to apply conductive adhesive to the first curved portion 21111 of the electrode 2111; then, the coating roller 10 rotates for the second revolution, and the coating area 11 rotates to the first side 101 for the second time; before the coating area 11 rotates to the first side 101 for the second time, the transition area 12 contacts the straight portion 21112; when the coating area 11 rotates to the first side 101 for the second time, the coating area 11 contacts the second curved portion 21111 of the electrode 2111 to apply conductive adhesive to the second curved portion 21111 of the electrode 2111; then... Afterwards, the coating roller 10 rotates for the third time, and the coating area 11 can rotate to the first side 101 for the third time; before the coating area 11 rotates to the first side 101 for the third time, the transition area 12 contacts the straight part 21112; when the coating area 11 rotates to the first side 101 for the third time, the coating area 11 contacts the third curved part 21111 of the electrode 2111 to roll-coat conductive adhesive to the third curved part 21111 of the electrode 2111... and so on, so that in each rotation cycle of the coating roller 10, the coating area 11 is used to contact each curved part 21111 to roll-coat conductive adhesive to each curved part 21111, thereby enabling the coating area 11 of the coating roller 10 to roll-coat conductive adhesive to multiple curved parts 21111 of the electrode 2111 in sequence.

[0202] The drive mechanism is used to drive the coating roller 10 to rotate. Specifically, the drive mechanism is used to drive the coating area 11 to contact each curved portion 21111 in each rotation cycle of the coating roller 10, and to drive the transition area 12 to contact each straight portion 21112 in each rotation cycle of the coating roller 10.

[0203] In some other possible designs, during multiple rotation cycles of the coating roller 10, the coating area 11 is used to sequentially contact multiple positions of the curved portion 21111, and the transition area 12 is also used to contact a portion of the curved portion 21111.

[0204] Understandably, during the operation of the electrode processing apparatus 100, the coating roller 10 rotates for the first revolution, and the coating area 11 rotates to the first side 101 for the first time, contacting the first position of the bent portion 21111 of the electrode 2111, so as to roll conductive adhesive onto the first position of the bent portion 21111. Then, the coating roller 10 rotates for the second revolution, and the coating area 11 rotates to the first side 101 for the second time. Before the coating area 11 rotates to the first side 101 for the second time, the transition area 12 rotates to the first side 101 to contact a portion of the bent portion 21111. When the coating area 11 rotates to the first side 101 for the second time, the coating area 11 contacts the second position of the bent portion 21111, so as to roll conductive adhesive onto the first position of the bent portion 21111. The second position of part 21111 is coated with conductive adhesive; then, the coating roller 10 rotates for the third time, and the coating area 11 can rotate to the first side 101 for the third time; before the coating area 11 rotates to the first side 101 for the third time, the transition area 12 rotates to the first side 101 to contact a portion of the curved part 21111; when the coating area 11 rotates to the first side 101 for the third time, the coating area 11 contacts the third position of the curved part 21111 to apply conductive adhesive to the third position of the curved part 21111... and so on, so that in multiple rotation cycles of the coating roller 10, the coating area 11 sequentially contacts multiple positions of the curved part 21111, thereby applying conductive adhesive to the curved part 21111 at intervals.

[0205] After the coating area 11 completes the application of conductive adhesive to one of the curved portions 21111, the transition area 12 can rotate to the first side 101 to contact the straight portion 21112 of the electrode 2111; then, the coating area 11 can contact the first position of the next curved portion 21111 to apply conductive adhesive to the first position of the next curved portion 21111; then, the coating area 11 can contact the second position of the next curved portion 21111... and so on.

[0206] The drive mechanism is used to drive the coating roller 10 to rotate. Specifically, the drive mechanism is used to drive the coating area 11 to sequentially contact multiple positions of the curved portion 21111 during multiple rotation cycles of the coating roller 10, and to drive the transition area 12 to contact a portion of the curved portion 21111. The drive mechanism is also used to drive the transition area 12 to contact the straight portion 21112 of the electrode sheet 2111 during some rotation cycles of the coating roller 10.

[0207] During the process of the glue application area 11 contacting the curved part 21111 at different positions, the rotation speed of the glue application roller 10 can be the same or different.

[0208] During the process of the transition zone 12 contacting different positions of the curved portion 21111, the rotation speed of the coating roller 10 can be the same or different.

[0209] The rotational speed of the coating roller 10 when it contacts the straight portion 21112 in the transition zone 12 and the rotational speed of the coating roller 10 when it contacts the curved portion 21111 in the transition zone 12 can be the same or different. As an example, the belt speed of the electrode 2111 remains constant, and the rotational speed of the coating roller 10 when it contacts the straight portion 21112 in the transition zone 12 is less than the rotational speed of the coating roller 10 when it contacts the curved portion 21111 in the transition zone 12, so that the transition zone 12 can contact either the straight portion 21112 or a portion of the curved portion 21111.

[0210] By adopting the above technical solution, the coating area 11 can roll-apply conductive adhesive to each bent portion 21111, thereby rolling-applying conductive adhesive to multiple bent portions 21111. Furthermore, in some cases, the coating area 11 can also roll-apply conductive adhesive to multiple locations of the bent portions 21111.

[0211] In some embodiments, please refer to FIG10, and in conjunction with other figures. FIG10 is a schematic diagram of the coating roller 10 of an electrode processing apparatus 100 provided in some embodiments of this application, and FIG10 uses dashed lines to separate the coating area 11 and the transition area 12 of the coating roller 10. The coating area 11 is used to contact the curved portion 21111 of the electrode 2111, and the transition area 12 is used to contact the straight portion 21112 of the electrode 2111. The coating roller 10 includes a plurality of coating areas 11 and a plurality of transition areas 12, which are alternately distributed along the circumferential direction X.

[0212] The alternating distribution of the glue application area 11 and the transition area 12 along the circumferential direction X means that multiple glue application areas 11 and multiple transition areas 12 are distributed along the circumferential direction X in the manner of glue application area 11, transition area 12, glue application area 11, transition area 12...

[0213] In some possible designs, during each rotation cycle of the coating roller 10, multiple coating zones 11 are used to contact multiple bends 21111 respectively.

[0214] Understandably, during the operation of the electrode processing apparatus 100, when the coating roller 10 rotates for the first revolution, the multiple coating areas 11 of the coating roller 10 can rotate sequentially to the first side 101 to contact the multiple curved portions 21111 respectively. Specifically, during the first revolution of the coating roller 10, the first coating area 11 of the coating roller 10 can first rotate to the first side 101 and contact the first curved portion 21111 of the electrode 2111 to roll-coat conductive adhesive to the first curved portion 21111 of the electrode 2111. Before the second coating area 11 rotates to the first side 101, the transition area 12 between the first coating area 11 and the second coating area 11 rotates to the first side 101 to contact the straight portion 21112; when the second coating area 11 rotates to the first side 101, the second coating area 11 contacts the second curved portion 21111 of the electrode 2111 to roll-coat conductive adhesive to the second curved portion 21111. Before the third coating area 11 rotates to the first side 101, the transition area 12 between the second and third coating areas 11 rotates to the first side 101 to contact the straight portion 21112; when the third coating area 11 rotates to the first side 101, the third coating area 11 contacts the third curved portion 21111 of the electrode 2111 to roll-coat the third curved portion 21111 with conductive adhesive... and so on, so that within one rotation cycle of the coating roller 10, multiple coating areas 11 roll-coat the multiple curved portions 21111 with conductive adhesive respectively.

[0215] In some cases, after the coating roller 10 rotates for the first time, the multiple coating areas 11 of the coating roller 10 rotate sequentially to the first side 101 so that conductive adhesive can be applied to the multiple curved portions 21111 respectively, thereby completing the operation of applying conductive adhesive to the electrode sheet 2111.

[0216] Alternatively, in other cases, the coating roller 10 may need to rotate a second, third, and so on. For example, during the rotation of the coating roller 10 in cycles other than the first, the multiple coating areas 11 of the coating roller 10 may rotate sequentially to the first side 101 to contact the multiple curved portions 21111 respectively, and this process is similar to the first cycle of the coating roller 10, and will not be repeated here.

[0217] The driving mechanism is used to drive the coating roller 10 to rotate. Specifically, the driving mechanism is used to drive the multiple coating areas 11 of the coating roller 10 to contact the multiple curved portions 21111 respectively in each rotation cycle of the coating roller 10, and to drive the multiple transition areas 12 of the coating roller 10 to contact the multiple straight portions 21112 respectively.

[0218] In some other possible designs, during each rotation cycle of the coating roller 10, a plurality of coating zones 11 are used to sequentially contact a plurality of positions of the curved portion 21111, and a transition zone 12 is also used to contact a portion of the curved portion 21111.

[0219] Understandably, as the coating roller 10 rotates each revolution, the multiple coating areas 11 of the coating roller 10 can rotate sequentially to the first side 101 to sequentially contact multiple positions of the curved portion 21111, thereby applying conductive adhesive to multiple positions of a curved portion 21111 at intervals.

[0220] During the operation of the electrode processing apparatus 100, the coating roller 10 rotates for the first revolution. The first coating area 11 of the coating roller 10 can rotate to the first side 101 and contact the first position of the first curved portion 21111 of the electrode 2111, thus applying conductive adhesive to the first position of the first curved portion 21111. Then, the second coating area 11 of the coating roller 10 can rotate to the first side 101. Before the second coating area 11 rotates to the first side 101, the transition area 12 between the first and second coating areas rotates to the first side 101 to contact a portion of the first curved portion 21111. When the second coating area 11 rotates to the first side 101, the second coating area 11 contacts the first curved portion 21111. The second position is used to apply conductive adhesive to the second position of the first curved portion 21111; then, the third coating area 11 of the coating roller 10 can rotate to the first side 101; before the third coating area 11 rotates to the first side 101, the transition area 12 between the second coating area 11 and the third coating area 11 contacts a portion of the first curved portion 21111; when the third coating area 11 rotates to the first side 101, the third coating area 11 contacts the third position of the first curved portion 21111... and so on, so that during the first rotation cycle, the multiple coating areas 11 of the coating roller 10 sequentially contact multiple positions of the first curved portion 21111, thereby applying conductive adhesive to the first curved portion 21111 at intervals.

[0221] Then, the coating roller 10 rotates for the second revolution, and the first coating area 11 of the coating roller 10 can first rotate to the first side 101; before the first coating area 11 of the coating roller 10 rotates to the first side 101, one of the transition areas 12 of the coating roller 10 contacts the straight portion 21112; when the first coating area 11 of the coating roller 10 rotates to the first side 101, the first coating area 11 of the coating roller 10 can contact the first position of the second curved portion 21111 of the electrode sheet 2111, so as to roll conductive adhesive onto the first position of the second curved portion 21111; then, the second coating area 11 of the coating roller 10 can rotate to the first side 101; in the second coating... Before zone 11 rotates to the first side 101, the transition zone 12 between the first and second coating zones 11 rotates to the first side 101 to contact a portion of the second curved portion 21111; when the second coating zone 11 rotates to the first side 101, the second coating zone 11 contacts the second position of the second curved portion 21111 to roll-apply conductive adhesive to the second position of the second curved portion 21111... and so on, so that during the second rotation cycle, the multiple coating zones 11 of the coating roller 10 sequentially contact the multiple positions of the second curved portion 21111, thereby rolling-applying conductive adhesive to the second curved portion 21111 at intervals.

[0222] Then, the coating roller 10 rotates for the third time... and so on.

[0223] The driving mechanism is used to drive the coating roller 10 to rotate. Specifically, the driving mechanism is used to drive the multiple coating areas 11 of the coating roller 10 to contact multiple positions of the curved portion 21111 in each rotation cycle of the coating roller 10, and to drive the transition area 12 of the coating roller 10 to contact the straight portion 21112.

[0224] During the process of the glue application area 11 contacting the curved part 21111 at different positions, the rotation speed of the glue application roller 10 can be the same or different.

[0225] During the process of the transition zone 12 contacting different positions of the curved portion 21111, the rotation speed of the coating roller 10 can be the same or different.

[0226] The rotational speed of the coating roller 10 when it contacts the straight portion 21112 in the transition zone 12 and the rotational speed of the coating roller 10 when it contacts the curved portion 21111 in the transition zone 12 can be the same or different. As an example, the belt speed of the electrode 2111 remains constant, and the rotational speed of the coating roller 10 when it contacts the straight portion 21112 in the transition zone 12 is less than the rotational speed of the coating roller 10 when it contacts the curved portion 21111 in the transition zone 12, so that the transition zone 12 can contact either the straight portion 21112 or a portion of the curved portion 21111.

[0227] By adopting the above technical solution, the multiple coating areas 11 of the coating roller 10 can be used to apply conductive adhesive to multiple curved portions 21111. Furthermore, in some cases, the multiple coating areas 11 of the coating roller 10 can be used to apply conductive adhesive to multiple locations of the curved portions 21111.

[0228] In some embodiments, the electrode processing apparatus 100 further includes a drying mechanism for drying the conductive adhesive on the electrode 2111.

[0229] The drying mechanism refers to the mechanism used to dry the electrode 2111.

[0230] Specifically, the drying mechanism is used to dry the conductive adhesive on the bent portion 21111 of the electrode 2111.

[0231] By adopting the above technical solution, during the operation of the processing device, the electrode 2111 can contact the coating roller 10, so that the coating roller 10 can roll conductive adhesive onto the bent portion 21111 of the electrode 2111; then, the electrode 2111 can be dried by the drying mechanism, so that the conductive adhesive on the bent portion 21111 can penetrate into the bent portion 21111.

[0232] This design allows the conductive adhesive to penetrate the bending portion 21111 better, thereby improving the flexibility and bonding ability of the bending portion 21111 and helping to improve the cracking problem of the bending portion 21111.

[0233] In some embodiments, the electrode processing apparatus 100 may further include a coating mechanism and a second drying mechanism. The drying mechanism is a first drying mechanism.

[0234] The coating mechanism is used to coat the active material onto the current collector to form the electrode 2111.

[0235] The second drying mechanism is used to dry the coated electrode 2111, so that the active material is fixed on the current collector.

[0236] The coating roller 10 is used to apply conductive adhesive to the electrode sheet 2111 output from the second drying mechanism.

[0237] Please refer to Figure 4 and other accompanying drawings. The battery processing system 1000 provided in this application embodiment includes an electrode processing device 100. The electrode processing device 100 in this embodiment is the same as the electrode processing device 100 in the previous embodiment; please refer to the relevant description of the electrode processing device 100 in the previous embodiment for details, which will not be repeated here.

[0238] The battery processing system 1000 provided in this application embodiment, by employing the electrode processing apparatus 100 described above, can roll-coat conductive adhesive onto the bent portion 21111 of the electrode 2111. In this way, the conductive adhesive can penetrate into the bent portion 21111, thereby improving the bonding strength and flexibility of the bent portion 21111, thus mitigating the problem of cracking in the bent portion 21111 and improving the reliability of the resulting battery 2000.

[0239] In some embodiments, please refer to FIG4, and in conjunction with other figures. The battery processing system 1000 further includes a winding device 200 and an assembly device 300. The winding device 200 is used to wind the electrode sheet 2111 to form an electrode assembly 2110, and the assembly device 300 is used to assemble the electrode assembly 2110 into a battery 2000.

[0240] Among them, the winding device 200 refers to the device used to wind the electrode sheet 2111 to form the electrode assembly 2110.

[0241] Assembly device 300 refers to a device used to assemble electrode assembly 2110 into battery 2000.

[0242] By adopting the above technical solution, the electrode processing device 100 first rolls conductive adhesive onto the bent portion 21111 of the electrode 2111, then winds the electrode 2111 coated with conductive adhesive by the winding device 200 to form an electrode assembly 2110, and then assembles the electrode assembly 2110 by the assembly device 300 to form a battery 2000.

[0243] This design improves the problem of cracking of the bent portion 21111 of the electrode 2111 in the battery 2000 assembly, thereby enhancing the reliability of the battery 2000.

[0244] Please refer to Figure 11, and in conjunction with other accompanying drawings. Figure 11 is a flowchart of a method for processing electrode 2111 according to some embodiments of this application. The electrode 2111 processing method provided in this application is applied to an electrode processing apparatus 100. The electrode processing apparatus 100 in this embodiment is the same as the electrode processing apparatus 100 in the previous embodiment; please refer to the relevant description of the electrode processing apparatus 100 in the previous embodiment for details, which will not be repeated here.

[0245] As shown in Figure 11, the electrode 2111 processing method provided in this embodiment includes the following steps:

[0246] S10. Drive the coating roller 10 to rotate through the drive mechanism, so that the coating area 11 of the outer peripheral wall of the coating roller 10 contacts the bent part 21111 of the electrode sheet 2111.

[0247] Specifically, by driving the coating roller 10 to rotate, the coating area 11 can contact the bent portion 21111 of the electrode 2111 on the first side 101, thereby allowing the conductive adhesive on the coating area 11 to be roller-coated onto the bent portion 21111.

[0248] S20. The coating roller 10 is driven to rotate by the drive mechanism, so that the transition area 12 of the outer peripheral wall of the coating roller 10 contacts the straight part 21112 of the electrode 2111.

[0249] Specifically, by driving the coating roller 10 to rotate, the transition zone 12 can contact the straight portion 21112 of the electrode 2111 on the first side 101.

[0250] The transition region 12 contacts the straight portion 21112 of the electrode 2111, which can be used to transition the straight portion 21112, so that the next curved portion 21111 of the electrode 2111 contacts the coating region 11, so that conductive adhesive can be rolled onto the coating region 11.

[0251] The electrode processing method provided in this application embodiment involves driving the coating area 11 of the coating roller 10 to contact the bent portion 21111 of the electrode 2111 during the processing of the electrode 2111, thereby applying conductive adhesive to the bent portion 21111. In this way, the conductive adhesive can penetrate into the bent portion 21111, improving the bonding strength and flexibility of the bent portion 21111, thus mitigating the problem of cracking in the bent portion 21111 and improving the reliability of the resulting battery 2000.

[0252] In some embodiments, please refer to FIG12, and in conjunction with FIGS. 5 to 7 and other figures. FIG12 is a flowchart of a method for processing electrode 2111 according to other embodiments of this application. The coating roller 10 includes a coating area 11 and a transition area 12.

[0253] Step S10 involves driving the coating roller 10 to rotate via a drive mechanism, causing the coating area 11 on the outer peripheral wall of the coating roller 10 to contact the bent portion 21111 of the electrode sheet 2111. This includes the following steps:

[0254] S11. During each rotation cycle of the coating roller 10, the coating area 11 is driven to contact each curved part 21111 by the drive mechanism.

[0255] Understandably, during the operation of the electrode processing apparatus 100, the coating roller 10 can be driven to rotate for the first revolution, and the coating area 11 can rotate to the first side 101 for the first time, and contact the first curved portion 21111 of the electrode 2111 to roll-coat the first curved portion 21111 of the electrode 2111; then, the coating roller 10 is driven to rotate for the second revolution, and the coating area 11 can rotate to the first side 101 for the second time; before the coating area 11 rotates to the first side 101 for the second time, the transition area 12 contacts the straight portion 21112; when the coating area 11 rotates to the first side 101 for the second time, the coating area 11 contacts the second curved portion 21111 of the electrode 2111 to roll-coat the second curved portion 21111 of the electrode 2111. Apply conductive adhesive; then, drive the coating roller 10 to rotate for the third revolution, and the coating area 11 can rotate to the first side 101 for the third time; before the coating area 11 rotates to the first side 101 for the third time, the transition area 12 contacts the straight portion 21112; when the coating area 11 rotates to the first side 101 for the third time, the coating area 11 contacts the third curved portion 21111 of the electrode 2111 to roll-apply conductive adhesive to the third curved portion 21111 of the electrode 2111... and so on. In each rotation cycle of the coating roller 10, the coating area 11 can contact each curved portion 21111 to roll-apply conductive adhesive to each curved portion 21111, so that the coating area 11 of the coating roller 10 can sequentially roll-apply conductive adhesive to multiple curved portions 21111 of the electrode 2111.

[0256] In some embodiments, please refer to FIG13, and in conjunction with FIGS. 5 to 7 and other figures. FIG13 is a flowchart of a method for processing electrode 2111 according to some embodiments of this application. The coating roller 10 includes a coating area 11 and a transition area 12.

[0257] Step S10 involves driving the coating roller 10 to rotate via a drive mechanism, causing the coating area 11 on the outer peripheral wall of the coating roller 10 to contact the bent portion 21111 of the electrode sheet 2111. This includes the following steps:

[0258] S12. During multiple rotation cycles of the coating roller 10, the coating area 11 is driven by the drive mechanism to sequentially contact multiple positions of the curved portion 21111.

[0259] In this way, during multiple rotation cycles of the coating roller 10, the coating area 11 can sequentially contact multiple positions of the bent portion 21111, thereby applying conductive adhesive to the bent portion 21111 at intervals.

[0260] The electrode 2111 processing method also includes the following steps:

[0261] S30. During multiple rotation cycles of the coating roller 10, the transition zone 12 is driven by the drive mechanism to contact a portion of the curved portion 21111.

[0262] Understandably, after the adhesive application area 11 contacts one position of the curved portion 21111 to apply conductive adhesive to one position of the curved portion 21111, before the adhesive application area 11 contacts another position of the curved portion 21111, the transition area 12 can be driven to contact a portion of the curved portion 21111 to facilitate the adhesive application area 11 contacting the other position of the curved portion 21111.

[0263] Understandably, during the operation of the electrode processing apparatus 100, the coating roller 10 can be driven to rotate for the first revolution, causing the coating area 11 to rotate to the first side 101 for the first time and contact the first position of the bent portion 21111 of the electrode 2111, so as to roll conductive adhesive onto the first position of the bent portion 21111; then, the coating roller 10 is driven to rotate for the second revolution, and the coating area 11 rotates to the first side 101 for the second time; before the coating area 11 rotates to the first side 101 for the second time, the transition area 12 rotates to the first side 101 to contact a portion of the bent portion 21111; when the coating area 11 rotates to the first side 101 for the second time, the coating area 11 contacts the second position of the bent portion 21111, so as to roll conductive adhesive onto the first position of the bent portion 21111. Conductive adhesive is applied to the second position of the curved portion 21111; then, the coating roller 10 is driven to rotate for the third revolution, and the coating area 11 can rotate to the first side 101 for the third time; before the coating area 11 rotates to the first side 101 for the third time, the transition area 12 rotates to the first side 101 to contact a portion of the curved portion 21111; when the coating area 11 rotates to the first side 101 for the third time, the coating area 11 contacts the third position of the curved portion 21111 to apply conductive adhesive to the third position of the curved portion 21111... and so on, so that in multiple rotation cycles of the coating roller 10, the coating area 11 sequentially contacts multiple positions of the curved portion 21111, thereby applying conductive adhesive to the curved portion 21111 at intervals.

[0264] After the coating area 11 has finished applying conductive adhesive to one of the curved portions 21111, the transition area 12 can be driven to rotate to the first side 101 to contact the straight portion 21112 of the electrode 2111; then, the coating area 11 is driven to contact the first position of the next curved portion 21111 to apply conductive adhesive to the first position of the next curved portion 21111; then, the coating area 11 is driven to contact the second position of the next curved portion 21111... and so on.

[0265] With this configuration, during multiple rotation cycles of the coating roller 10, the coating area 11 can sequentially contact multiple positions of the curved portion 21111 to apply conductive adhesive to the multiple positions of the curved portion 21111 at intervals. Furthermore, the coating area 11 can apply conductive adhesive to multiple curved portions 21111.

[0266] In some embodiments, please refer to FIG14, and in conjunction with FIG10 and other figures. FIG14 is a flowchart of a method for processing electrode 2111 provided in some embodiments of this application. The coating roller 10 includes a plurality of coating areas 11 and a plurality of transition areas 12, which are alternately distributed along the circumferential direction X.

[0267] Step S10 involves driving the coating roller 10 to rotate via a drive mechanism, causing the coating area 11 on the outer peripheral wall of the coating roller 10 to contact the bent portion 21111 of the electrode sheet 2111. This includes the following steps:

[0268] S13. During each rotation cycle of the coating roller 10, the multiple coating areas 11 are driven by the drive mechanism to contact the multiple curved parts 21111 respectively.

[0269] Understandably, during the operation of the electrode processing apparatus 100, the coating roller 10 can be driven to rotate for the first revolution, causing the multiple coating areas 11 of the coating roller 10 to rotate sequentially to the first side 101 to contact the multiple curved portions 21111 respectively. Specifically, during the first revolution of the coating roller 10, the first coating area 11 of the coating roller 10 can rotate to the first side 101 and contact the first curved portion 21111 of the electrode 2111 to roll-coat conductive adhesive to the first curved portion 21111 of the electrode 2111. Before the second coating area 11 rotates to the first side 101, the transition area 12 between the first coating area 11 and the second coating area 11 rotates to the first side 101 to contact the straight portion 21112; when the second coating area 11 rotates to the first side 101, the second coating area 11 contacts the second curved portion 21111 of the electrode 2111 to roll-coat conductive adhesive to the second curved portion 21111. Before the third coating area 11 rotates to the first side 101, the transition area 12 between the second and third coating areas 11 rotates to the first side 101 to contact the straight portion 21112; when the third coating area 11 rotates to the first side 101, the third coating area 11 contacts the third curved portion 21111 of the electrode 2111 to roll-coat the third curved portion 21111 with conductive adhesive... and so on, so that within one rotation cycle of the coating roller 10, multiple coating areas 11 roll-coat the multiple curved portions 21111 with conductive adhesive respectively.

[0270] In some cases, the coating roller 10 is driven to rotate for the first revolution, and the multiple coating areas 11 of the coating roller 10 rotate sequentially to the first side 101 to apply conductive adhesive to the multiple curved portions 21111, thus completing the operation of applying conductive adhesive to the electrode sheet 2111. Alternatively, in other cases, the coating roller 10 can be driven to rotate for the second revolution, the third revolution, and so on. For example, during the cycles of the coating roller 10 other than the first revolution, the multiple coating areas 11 of the coating roller 10 can rotate sequentially to the first side 101 to contact the multiple curved portions 21111 respectively, and this process is similar to the first revolution of the coating roller 10, and will not be repeated here.

[0271] With this configuration, during each rotation cycle of the coating roller 10, multiple coating areas 11 can respectively contact multiple curved portions 21111 to apply conductive adhesive to the multiple curved portions 21111. That is, the multiple coating areas 11 of the coating roller 10 can cooperate to apply conductive adhesive to the multiple curved portions 21111.

[0272] In some embodiments, the coating roller 10 includes a plurality of coating areas 11 and a plurality of transition areas 12, which are alternately distributed along the circumferential direction X.

[0273] Step S10 involves driving the coating roller 10 to rotate via a drive mechanism, causing the coating area 11 on the outer peripheral wall of the coating roller 10 to contact the bent portion 21111 of the electrode sheet 2111. This includes the following steps:

[0274] S14. During each rotation cycle of the coating roller 10, the multiple coating areas 11 are driven by the drive mechanism to sequentially contact multiple positions of the curved portion 21111.

[0275] The processing method for electrode 2111 also includes:

[0276] S40. During each rotation cycle of the coating roller 10, the transition zone 12 is driven by the drive mechanism to contact a portion of the curved portion 21111.

[0277] Understandably, after the adhesive application area 11 contacts one position of the curved portion 21111 to apply conductive adhesive to one position of the curved portion 21111, before the adhesive application area 11 contacts another position of the curved portion 21111, the transition area 12 can be driven to contact a portion of the curved portion 21111 to facilitate the adhesive application area 11 contacting the other position of the curved portion 21111.

[0278] Understandably, as the coating roller 10 rotates each revolution, the multiple coating areas 11 of the coating roller 10 can rotate sequentially to the first side 101 to sequentially contact multiple positions of the curved portion 21111, thereby applying conductive adhesive to multiple positions of a curved portion 21111 at intervals.

[0279] During the operation of the electrode processing apparatus 100, the coating roller 10 can be driven to rotate for the first revolution, so that the first coating area 11 of the coating roller 10 rotates to the first side 101 and contacts the first position of the first curved portion 21111 of the electrode 2111, so as to roll conductive adhesive onto the first position of the first curved portion 21111. Then, the second coating area 11 of the coating roller 10 is driven to rotate to the first side 101. Before the second coating area 11 rotates to the first side 101, the transition area 12 between the first coating area 11 and the second coating area 11 rotates to the first side 101 to contact a portion of the first curved portion 21111. When the second coating area 11 rotates to the first side 101, the second coating area 11 contacts the first curved portion 2111. The first bending portion 21111 is roller-applied to the second position of the first bending portion 21111. Then, the third coating area 11 of the coating roller 10 is driven to rotate to the first side 101. Before the third coating area 11 rotates to the first side 101, the transition area 12 between the second coating area 11 and the third coating area 11 contacts a portion of the first bending portion 21111. When the third coating area 11 rotates to the first side 101, the third coating area 11 contacts the third position of the first bending portion 21111. And so on, so that during the first rotation cycle, the multiple coating areas 11 of the coating roller 10 sequentially contact multiple positions of the first bending portion 21111, thereby applying conductive adhesive to the first bending portion 21111 at intervals.

[0280] Then, the coating roller 10 is driven to rotate a second revolution, so that the first coating area 11 of the coating roller 10 can rotate to the first side 101 firstly; before the first coating area 11 of the coating roller 10 rotates to the first side 101, one of the transition areas 12 of the coating roller 10 contacts the straight portion 21112; when the first coating area 11 of the coating roller 10 rotates to the first side 101, the first coating area 11 of the coating roller 10 can contact the first position of the second curved portion 21111 of the electrode sheet 2111, so as to roll conductive adhesive onto the first position of the second curved portion 21111; then, the second coating area 11 of the coating roller 10 is driven to rotate to the first side 101; in the second Before the first coating area 11 rotates to the first side 101, the transition area 12 between the first coating area 11 and the second coating area 11 rotates to the first side 101 to contact a portion of the second curved portion 21111; when the second coating area 11 rotates to the first side 101, the second coating area 11 contacts the second position of the second curved portion 21111 to roll-apply conductive adhesive to the second position of the second curved portion 21111... and so on, so that during the second rotation cycle, the multiple coating areas 11 of the coating roller 10 sequentially contact the multiple positions of the second curved portion 21111, thereby rolling-applying conductive adhesive to the second curved portion 21111 at intervals.

[0281] Then, drive the coating roller 10 to rotate for the third revolution... and so on.

[0282] This configuration allows multiple coating areas 11 to sequentially contact multiple locations on the curved portion 21111 during each rotation cycle of the coating roller 10, thereby applying conductive adhesive to these multiple locations on the curved portion 21111. In other words, the multiple coating areas 11 of the coating roller 10 can cooperate to apply conductive adhesive to multiple curved portions 21111. Furthermore, the multiple coating areas 11 of the coating roller 10 can cooperate to apply conductive adhesive to multiple locations on the curved portion 21111.

[0283] In some embodiments, step S10, which involves driving the coating roller 10 to rotate via a driving mechanism so that the coating area 11 on the outer peripheral wall of the coating roller 10 contacts the bent portion 21111 of the electrode sheet 2111, includes the following steps:

[0284] S15. Drive the coating roller 10 to rotate through the drive mechanism, so that the coating area 11 contacts the curved part 21111, and make the rotation speed of the coating roller 10 the same as the conveyor speed of the curved part 21111.

[0285] That is, when the glue application area 11 contacts the curved section 21111, the rotational linear speed of the glue application roller 10 is set to be the same as the conveyor speed of the curved section 21111.

[0286] Understandably, as the curved section 21111 travels to the first side 101 to contact the coating area 11, the rotational linear speed of the coating roller 10 is the same as the travel speed of the curved section 21111.

[0287] In this way, during the process of the bent portion 21111 contacting the coating area 11, the coating area 11 can move synchronously with the bent portion 21111, which makes it easier for the coating area 11 to apply the conductive adhesive roller to the bent portion 21111 of the electrode sheet 2111, thereby improving the effect of the coating area 11 in applying the conductive adhesive roller to the bent portion 21111 and improving the problem of cracking of the bent portion 21111.

[0288] In some embodiments, after step S10, in which the coating roller 10 is driven to rotate by the driving mechanism so that the coating area 11 of the outer peripheral wall of the coating roller 10 contacts the curved portion 21111 of the electrode sheet 2111, and before step S20, in which the coating roller 10 is driven to rotate so that the transition area 12 of the outer peripheral wall of the coating roller 10 contacts the straight portion 21112 of the electrode sheet, the following steps are included:

[0289] S40, Drive the flat part 21112 of the adhesive application area 11 to the contact part via the drive mechanism.

[0290] Understandably, the adhesive application area 11 is used not only to contact the curved portion 21111, but also to contact the straight portion 21112. Correspondingly, the transition area 12 is used to contact the curved portion 21111.

[0291] Specifically, based on the above embodiments, after the coating area 11 contacts the curved portion 21111 to roll-coat the curved portion 21111 with conductive adhesive, before the transition area 12 contacts the straight portion 21112, the coating area 11 continues to contact a portion of the straight portion 21112 to roll-coat the portion of the straight portion 21112 with conductive adhesive.

[0292] That is, after the curved portion 21111 of the electrode 2111 bypasses and contacts the adhesive coating area 11, a portion of the straight portion 21112 of the electrode 2111 bypasses and contacts the adhesive coating area 11, and the remaining portion of the straight portion 21112 of the electrode 2111 bypasses and contacts the transition area 12.

[0293] This configuration allows conductive adhesive to be applied to the connection point between the curved portion 21111 and the straight portion 21112, as well as the curved portion 21111, through the adhesive application area 11, thereby effectively improving the problem of electrode cracking.

[0294] In some embodiments, step S10, which involves driving the coating roller 10 to rotate via a driving mechanism so that the coating area 11 on the outer peripheral wall of the coating roller 10 contacts the bent portion 21111 of the electrode sheet 2111, includes the following steps:

[0295] S16. The adhesive coating area 11 is driven by the drive mechanism to contact the electrode sheet 2111 with 1 to 5 bent portions 21111 in each electrode assembly 2110.

[0296] The electrode 2111 includes multiple parts, each part corresponding to each electrode assembly 2110.

[0297] By adopting the above technical solution, the first to third bending portions 21111, or the first to fourth bending portions 21111, or the first to fifth bending portions 21111 of the electrode assembly 2110 can be coated with conductive adhesive, thereby improving the problem of electrode cracking and improving the reliability of battery 2000.

[0298] Please refer to Figures 1 to 3 together with other accompanying drawings. The battery 2000 provided in this embodiment includes an electrode 2111, which is processed by an electrode processing apparatus 100 or an electrode processing method. The electrode 2111 includes a straight portion 21112 and a bent portion 21111, with the bent portion 21111 connected to the straight portion 21112. The bent portion 21111 is bent and has conductive adhesive on it. The electrode processing apparatus 100 and electrode processing method in this embodiment are the same as those in the above embodiments; please refer to the relevant descriptions of the electrode processing apparatus 100 and electrode processing methods in the above embodiments for details, which will not be repeated here.

[0299] The battery 2000 provided in this application embodiment has conductive adhesive provided in the bent portion 21111 of the electrode 2111, which can effectively improve the problem of electrode 2111 cracking and thus improve the reliability of the battery 2000.

[0300] As one embodiment of this application, as shown in Figures 5 to 7, the electrode processing apparatus 100 includes a coating roller 10, a pressure roller 40, a storage bin 20, and a scraper 30. The outer peripheral wall of the coating roller 10 includes a coating area 11 and a transition area 12, which are distributed along the circumferential direction X. The coating area 11 is provided with a textured surface 1111, which surrounds a glue groove 11111 for containing conductive adhesive. The pressure roller 40 and the storage bin 20 are respectively located on opposite sides of the coating roller 10. Both the coating roller 10 and the pressure roller 40 are rotatable, and the rotation axis of the coating roller 10 is parallel to the rotation axis of the pressure roller 40. A roller coating gap 103 is formed between the outer peripheral walls of the coating roller 10 and the outer peripheral walls of the pressure roller 40, and the roller coating gap 103 is used for the passage of the electrode 2111. The coating zone 11 is used to contact the curved portion 21111 of the electrode 2111 at the roller coating gap 103, so as to apply the conductive adhesive in the adhesive tank 11111 to the curved portion 21111. The transition zone 12 is used to contact the straight portion 21112 of the electrode 2111 at the roller coating gap 103. In the distribution direction of the pressure roller 40 and the storage bin 20, part of the coating roller 10 is located below the liquid surface of the storage bin 20, and part is located above the liquid surface of the storage bin 20. In the distribution direction of the pressure roller 40 and the storage bin 20, the scraper 30 is provided between the storage bin 20 and the pressure roller 40, and is provided on the path of the coating roller 10 rotating from the storage bin 20 to the pressure roller 40, and abuts against the outer peripheral wall of the coating roller 10.

[0301] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An electrode processing apparatus, wherein, include: A coating roller, the outer peripheral wall of which is used to contact the electrode sheet; The outer peripheral wall of the coating roller includes a coating area and a transition area distributed circumferentially. The coating area is provided with a glue groove for accommodating conductive glue. The coating area is used for the conductive glue roller to coat the electrode sheet when in contact with the electrode sheet. A drive mechanism is used to drive the coating roller to rotate.

2. The electrode processing apparatus according to claim 1, wherein, The adhesive application area has a mesh pattern, which surrounds and forms multiple adhesive grooves.

3. The electrode processing apparatus according to claim 1 or 2, wherein, The electrode processing apparatus further includes a storage bin for storing the conductive adhesive, with at least a portion of the coating roller located within the storage bin, allowing the adhesive trough to retrieve the conductive adhesive from the storage bin.

4. The electrode processing apparatus according to claim 3, wherein, The coating roller has a first side and a second side opposite to each other along a first direction, the first direction intersecting the axial direction of the coating roller; the coating roller is used to contact the electrode sheet on the first side, and at least a portion of the storage bin is located on the second side; the electrode sheet processing device further includes a scraper, the scraper being located on the path of the outer peripheral wall of the coating roller rotating from the second side toward the first side, and used to abut against the outer peripheral wall of the coating roller; the coating roller is used to rotate relative to the scraper.

5. The electrode processing apparatus according to any one of claims 1-4, wherein, The electrode processing device further includes a pressure roller, the outer peripheral wall of the pressure roller and the outer peripheral wall of the coating roller are spaced apart to form a roller coating gap for the electrode to pass through, and the coating area is used to cooperate with the pressure roller to apply the conductive adhesive to the electrode passing through the roller coating gap.

6. The electrode processing apparatus according to any one of claims 1-5, wherein, The coating area includes at least one set of coating sections, the glue tank is disposed on the coating section, and each set of coating sections extends along the axial direction of the coating roller; When the adhesive coating section is provided in multiple groups, the multiple groups of adhesive coating sections are distributed at intervals along the circumferential direction.

7. The electrode processing apparatus according to any one of claims 1-6, wherein, The drive mechanism is used to adjust the rotational speed of the coating roller when it contacts the electrode in the coating area and when it contacts the electrode in the transition area.

8. The electrode processing apparatus according to any one of claims 1-7, wherein, The adhesive coating area is used to contact the curved portion of the electrode sheet, and the transition area is used to contact the straight portion of the electrode sheet; The coating roller includes a coating area and a transition area; During each rotation cycle of the coating roller, the coating area is used to contact each of the curved portions; or, during multiple rotation cycles of the coating roller, the coating area is used to sequentially contact multiple positions of the curved portions, and the transition area is also used to contact a portion of the curved portions.

9. The electrode processing apparatus according to any one of claims 1-7, wherein, The adhesive coating area is used to contact the curved portion of the electrode sheet, and the transition area is used to contact the straight portion of the electrode sheet; The coating roller includes a plurality of coating areas and a plurality of transition areas, the coating areas and transition areas being alternately distributed along the circumferential direction; During each rotation cycle of the coating roller, a plurality of coating zones are used to contact a plurality of the curved portions respectively; or, during each rotation cycle of the coating roller, a plurality of coating zones are used to sequentially contact a plurality of positions of the curved portion, and the transition zone is also used to contact a portion of the curved portion.

10. The electrode processing apparatus according to any one of claims 1-9, wherein, The electrode processing apparatus further includes a drying mechanism for drying the conductive adhesive on the electrode.

11. A battery processing system, wherein, Includes the electrode processing apparatus according to any one of claims 1-10.

12. The battery processing system according to claim 11, wherein, The battery processing system also includes: A winding device for winding the electrode sheet to form an electrode assembly; An assembly apparatus for assembling the electrode assembly into a battery.

13. A method for processing electrode sheets, wherein, Applied to the electrode processing apparatus according to any one of claims 1-10; the electrode processing method includes: The coating roller is driven to rotate by a drive mechanism, so that the coating area on the outer peripheral wall of the coating roller contacts the curved part of the electrode sheet. The coating roller is driven to rotate by the driving mechanism, so that the transition area of ​​the outer peripheral wall of the coating roller contacts the flat part of the electrode sheet.

14. The electrode processing method according to claim 13, wherein, The coating roller includes a coating area and a transition area; the step of driving the coating roller to rotate via a drive mechanism, causing the coating area on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, includes: During each rotation cycle of the coating roller, the coating area is driven to contact each of the curved portions by the drive mechanism.

15. The electrode processing method according to claim 13, wherein, The coating roller includes a coating area and a transition area; the step of driving the coating roller to rotate via a drive mechanism, causing the coating area on the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, includes: During multiple rotation cycles of the coating roller, the coating area is driven by the driving mechanism to sequentially contact multiple positions of the curved portion; The electrode processing method further includes: During multiple rotation cycles of the coating roller, the drive mechanism drives the transition zone to contact a portion of the curved section.

16. The electrode processing method according to claim 13, wherein, The coating roller includes a plurality of coating areas and a plurality of transition areas, the coating areas and transition areas being alternately distributed along the circumferential direction; The step of driving the coating roller to rotate via a drive mechanism, so that the coating area on the outer peripheral wall of the coating roller contacts the curved portion of the electrode sheet, includes: During each rotation cycle of the coating roller, the driving mechanism drives multiple coating areas to contact multiple curved portions respectively.

17. The electrode processing method according to claim 13, wherein, The coating roller includes a plurality of coating areas and a plurality of transition areas, the coating areas and transition areas being alternately distributed along the circumferential direction; The step of driving the coating roller to rotate via a drive mechanism, so that the coating area on the outer peripheral wall of the coating roller contacts the curved portion of the electrode sheet, includes: During each rotation cycle of the coating roller, the driving mechanism drives multiple coating areas to sequentially contact multiple positions of the curved portion; The electrode processing method further includes: During each rotation cycle of the coating roller, the drive mechanism drives the transition zone to contact a portion of the curved section.

18. The electrode processing method according to any one of claims 13-17, wherein, The step of driving the coating roller to rotate via a drive mechanism, so that the coating area on the outer peripheral wall of the coating roller contacts the curved portion of the electrode sheet, includes: The glue-applying roller is driven to rotate by the drive mechanism, so that the glue-applying area contacts the curved part, and the rotational linear speed of the glue-applying roller is the same as the conveyor speed of the curved part.

19. The electrode processing method according to any one of claims 13-17, wherein, After the process of driving the coating roller to rotate via the driving mechanism, causing the coating area of ​​the outer peripheral wall of the coating roller to contact the curved portion of the electrode sheet, and before the process of driving the coating roller to rotate via the driving mechanism, causing the transition area of ​​the outer peripheral wall of the coating roller to contact the straight portion of the electrode sheet, the method further includes: The straight portion of the adhesive application area is driven by the driving mechanism.

20. The electrode processing method according to any one of claims 13-19, wherein, The step of driving the coating roller to rotate via a drive mechanism, so that the coating area on the outer peripheral wall of the coating roller contacts the curved portion of the electrode sheet, includes: The drive mechanism drives the adhesive coating area to contact the electrode sheet at 3 to 5 of the bends in each electrode assembly.

21. A battery, wherein, The electrode includes an electrode sheet, which is processed by an electrode processing apparatus according to any one of claims 1-10 or an electrode processing method according to any one of claims 13-20; the electrode sheet includes a straight portion and a curved portion connected to the straight portion, the curved portion being bent and having conductive adhesive on it.

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