A chuck, a deviation rectifying device and a lamination apparatus

Abstract

The application discloses a suction disc, a deviation rectifying device and a lamination device, and relates to the technical field of cell lamination. The suction disc is used for adsorbing a pole piece assembly of a cell, and the pole piece assembly comprises a pole piece and a tab. The suction disc has a suction surface and at least one group of air suction channels, and the air suction channel comprises an air suction port, a tab adsorption hole group, a pole piece adsorption hole group and an air duct. The air suction port is arranged on the suction surface and is used for being connected with an air suction device. The tab adsorption hole group is arranged on the suction surface and is used for adsorbing the tab. The pole piece adsorption hole group is arranged on the suction surface and is used for adsorbing the pole piece. The air duct is arranged on the suction disc and is communicated with the air suction port, the tab adsorption hole group and the pole piece adsorption hole group. The suction disc adsorbs the pole piece through the pole piece adsorption hole group and adsorbs the tab through the tab adsorption hole group, effectively inhibits the warping tendency of the tab caused by self stress, gravity or external interference, solves the problem that, in the prior art, the tab lacks adsorption and causes warping and further causes lamination positioning inaccuracy, and ensures the lamination alignment precision of the pole piece assembly.

Description

Technical Field

[0001] This application relates to the field of battery cell stacking technology, and in particular to a suction cup, a correction device, and a stacking equipment. Background Technology

[0002] Currently, lithium battery production is mainly divided into two methods: winding and stacking. Compared with winding, stacking produces cells with higher energy density and better quality. For the stacking process, the stacking of electrode sheets is a crucial step in cell assembly, and its quality directly affects the battery's capacity, cycle life, and safety.

[0003] In the stacking process, electrode assemblies (including electrodes and tabs) are picked up by a vacuum adsorption mechanism and stacked in a preset order to form a stacked structure of the battery cell. Specifically, the vacuum adsorption mechanism uses suction plates to adsorb the electrode assemblies.

[0004] In related technologies, when electrode components are adsorbed by suction plates, the tabs often warp, affecting the stacking alignment accuracy. Utility Model Content

[0005] Based on this, this application provides a suction cup, a correction device, and a stacking device to solve the problem that the tabs often warp when the electrode assembly is adsorbed by a suction plate in the related art.

[0006] In a first aspect, embodiments of this application provide a suction cup for adsorbing electrode assemblies of battery cells. The electrode assembly includes electrode sheets and tabs. The suction cup has an adsorption surface and at least one set of suction air paths, the suction air paths including:

[0007] An air intake, which is located on the suction cup, is used to connect to the air intake device;

[0008] A tab adsorption pore group is formed on the adsorption surface and is used to adsorb the tabs;

[0009] An electrode adsorption pore group is formed on the adsorption surface and is used to adsorb the electrode.

[0010] An air passage is provided in the suction cup and connected to the air inlet, the tab adsorption hole group, and the electrode adsorption hole group.

[0011] In some embodiments, the negative pressure of the tab adsorption hole group is configured to be less than the negative pressure of the electrode adsorption hole group.

[0012] In some embodiments, the electrode adsorption pore group includes:

[0013] Multiple central adsorption holes are provided, which are formed on the adsorption surface and are used to adsorb the central region of the electrode sheet.

[0014] Multiple edge adsorption holes are formed on the adsorption surface and are spaced apart from the multiple central adsorption holes. The edge adsorption holes are used to adsorb the edge area of ​​the electrode sheet.

[0015] In some embodiments, along the suction direction of the suction path, both the central adsorption hole and the edge adsorption hole are located downstream of the tab adsorption hole group.

[0016] In some embodiments, the inhalation airway includes two of the electrode adsorption hole groups, and the air passage includes:

[0017] The main path, one end of which is connected to the air intake, and the central adsorption hole and the edge adsorption hole are both connected to the middle of the main path;

[0018] The first branch and the second branch are connected at one end to the other end of the main road, and at the other end of the first branch and the second branch are respectively connected to the two electrode adsorption hole groups.

[0019] In some embodiments, the diameter of the edge adsorption pores is larger than that of the central adsorption pores.

[0020] Secondly, embodiments of this application provide a correction device, comprising:

[0021] The alignment mechanism is used to adjust the position of the electrode assembly;

[0022] The suction cup described in the first aspect;

[0023] A first driving mechanism is provided, with the suction cup mounted on its output end. The first driving mechanism drives the suction cup to move, thereby transferring the electrode assembly on the conveying device to the correction mechanism.

[0024] The second drive mechanism has the suction cup installed at its output end. The second drive mechanism drives the suction cup to move, so as to transfer the electrode assembly on the correction mechanism to the stacking stage.

[0025] Thirdly, embodiments of this application provide a stacking apparatus, comprising:

[0026] The correction device described in the second aspect;

[0027] A stacking stage is used to support the electrode assembly;

[0028] A conveying device for conveying the electrode assembly.

[0029] In some embodiments, the stacking equipment includes two conveying devices and two sets of correction devices, with the two sets of correction devices located between the two conveying devices and the correction devices and conveying devices being arranged correspondingly; the stacking table is arranged between the two sets of correction devices.

[0030] In some embodiments, the stacking apparatus further includes:

[0031] A coating device for disposing a diaphragm between two adjacent electrode assemblies.

[0032] This application has at least the following beneficial effects:

[0033] The suction cup provided in this application has an adsorption surface and at least one set of suction air paths, wherein the suction air paths include an air inlet, a tab adsorption hole group, an electrode adsorption hole group, and an air channel. The tab adsorption hole group and the electrode adsorption hole group are respectively opened on the adsorption surface, and can form a connected negative pressure circuit through the air channel and the air inlet, so that the suction cup can simultaneously apply adsorption force to the electrode and the tab; wherein, the electrode adsorption hole group provides stable adsorption for the electrode, ensuring that the electrode is flat and wrinkle-free during the transfer process; the tab adsorption hole group adsorbs the tab, effectively suppressing the warping tendency of the tab caused by its own stress, gravity, or external interference, solving the problem in related technologies that warping is caused by the lack of adsorption of the tab, which in turn leads to inaccurate stacking positioning, and ensuring the stacking alignment accuracy of the electrode assembly. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the suction cup structure in one or more embodiments of this application.

[0036] Figure 2 This is a schematic diagram of the suction air path of the suction cup in one or more embodiments of this application.

[0037] Figure 3 This is a schematic diagram of the structure of the electrode assembly in one or more embodiments of this application.

[0038] Figure 4 This is a schematic diagram of the stacking device in one or more embodiments of this application.

[0039] Figure 5 This is a schematic diagram of the coating device, stacking table, and correction mechanism in one or more embodiments of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1000-Stacking equipment, 100-Correction device, 10-Suction cup, 10a-Adsorption surface, 10b-Suction air path, 10c-Suction port, 10d-Electrode tab adsorption hole group, 10d1-Electrode tab adsorption hole, 10e-Electrode adsorption hole group, 10e1-Central adsorption hole, 10e2-Edge adsorption hole, 10f-Air passage, 10f1-Main path, 10f2-First branch path, 10f3-Second branch path, 20-Correction mechanism, 30-First drive mechanism, 40-Second drive mechanism, 200-Stacking table, 300-Conveying device, 400-Coating device, 2000-Electrode assembly, 2100-Electrode, 2200-Electrode tab, 3000-Separator. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. 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. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] The terms “first,” “second,” and “third” (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0046] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0047] Currently, lithium battery production is mainly divided into two methods: winding and stacking. Compared with winding, stacking produces cells with higher energy density and better quality. For the stacking process, the stacking of electrode sheets is a crucial step in cell assembly, and its quality directly affects the battery's capacity, cycle life, and safety.

[0048] In the stacking process, electrode assemblies (including electrodes and tabs) are picked up by a vacuum adsorption mechanism and stacked in a preset order to form a stacked structure of the battery cell. Specifically, the vacuum adsorption mechanism uses suction plates to adsorb the electrode assemblies.

[0049] In related technologies, when the electrode assembly is adsorbed by the suction plate, the suction plate can only adsorb the electrode in the electrode assembly and cannot adsorb the tab. Therefore, the tab will warp due to the lack of adsorption force, resulting in inaccurate positioning when the electrode assembly is stacked, affecting the stacking alignment accuracy. In severe cases, there is also a risk of short circuit between the tab and the adjacent electrode, reducing the yield rate of cell production.

[0050] In view of this, the applicant has designed a suction cup, a correction device, and a stacking device. The suction cup, correction device, and stacking device provided in the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, this application embodiment provides a suction cup 10 for adsorbing electrode assemblies 2000 of battery cells. The electrode assembly 2000 includes electrode 2100 and tabs 2200. The suction cup 10 has an adsorption surface 10a and at least one set of suction air passages 10b. The suction air passages 10b include: an air inlet 10c, a tab adsorption hole group 10d, an electrode adsorption hole group 10e, and an air channel 10f. The air inlet 10c is opened in the suction cup 10 for connection to an air intake device. The tab adsorption hole group 10d is opened in the adsorption surface 10a and is used to adsorb the tabs 2200. The electrode adsorption hole group 10e is opened in the adsorption surface 10a and is used to adsorb the electrode 2100. The air channel 10f is opened in the suction cup 10 and connects to the air inlet 10c, the tab adsorption hole group 10d, and the electrode adsorption hole group 10e.

[0052] like Figure 3 As shown, the electrode assembly 2000 includes an electrode 2100 and a tab 2200. The tab 2200 is fixedly connected to the edge of the electrode 2100. Each electrode 2100 can be provided with one or more tabs 2200. The number of tabs 2200 on the electrode 2100 can be adaptively designed according to factors such as the current requirements, structural layout and size specifications of the battery cell. Among them, electrode 2100 is one of the components of the battery cell that realizes energy storage and conversion. Its surface is coated with active material (positive electrode is usually coated with positive active material, and negative electrode is usually coated with negative active material). Through electrochemical reactions during charging and discharging, lithium ions are inserted and extracted, which affects the capacity, energy density and other performance of the battery cell. The tab 2200 is mostly a metal sheet (such as aluminum, nickel, nickel-aluminum composite strip, etc.) as a conductive connector. One end of it is connected to the current collector (conductive substrate used to collect current) of electrode 2100, and the other end extends outward. In the battery cell assembly and subsequent use, it can realize electrical connection with external circuits through current collection and other means, and is the transmission channel of the battery cell charging and discharging current.

[0053] The suction cup 10 has a plate-like structure, and its adsorption surface 10a is adapted to the shape of the adsorption surface 2000a of the electrode assembly 2000 (i.e., the surface of the electrode 2100 and the tab 2200 facing the suction cup 10 and actually in contact with it). This shape adaptation design ensures that the adsorption surface 10a of the suction cup 10 forms a tight fit with the electrode 2100 and the tab 2200. For example, if the adsorption surface 2000a of the electrode assembly 2000 is flat, the adsorption surface 10a of the suction cup 10 is designed to be flat accordingly, thereby achieving full contact between the two, reducing gaps and enhancing adsorption sealing.

[0054] The suction cup 10 has at least one set of suction air passages 10b, such as Figure 2 As shown, each suction air path 10b includes a suction port 10c, an electrode tab adsorption hole group 10d, an electrode adsorption hole group 10e, and an air channel 10f. When the suction cup 10 has multiple suction air paths 10b, each air path works independently, and the suction cup 10 can simultaneously pick up multiple electrode components 2000, improving gripping efficiency.

[0055] The suction port 10c is located on the non-adsorption surface of the suction cup 10 and is used to connect to an external suction device (such as a vacuum pump) to provide a negative pressure source for the entire suction path 10b.

[0056] The tab adsorption hole group 10d includes a plurality of tab adsorption holes 10d1 spaced apart. The tab adsorption holes 10d1 are opened on the adsorption surface 10a of the suction cup 10. The number and position of the tab adsorption hole group 10d correspond one-to-one with the number and position of the tabs 2200 (i.e., each tab 2200 corresponds to a group of tab adsorption holes 10d). The distribution range of each group of tab adsorption holes 10d covers the area where the corresponding tab 2200 and the adsorption surface 10a of the suction cup 10 actually contact, which can form uniform adsorption on the tab 2200, thereby counteracting the warping tendency of the tab 2200 caused by its own stress or external interference.

[0057] The electrode adsorption hole group 10e includes multiple electrode adsorption holes spaced apart. The electrode adsorption holes are also opened on the adsorption surface 10a of the suction cup 10. The distribution range of the multiple electrode adsorption holes covers the area where the electrode 2100 and the adsorption surface 10a of the suction cup 10 actually contact, so as to ensure the uniformity of adsorption of the electrode 2100, ensure that the electrode 2100 remains flat during the transfer process, and avoid affecting the subsequent stacking accuracy due to local protrusions or wrinkles.

[0058] The air passage 10f is located inside the suction cup 10 and is used to connect the air inlet 10c, the tab adsorption hole group 10d and the electrode adsorption hole group 10e, so that the negative pressure generated by the air inlet device can be transmitted along the air passage 10f to each tab adsorption hole 10d1 and electrode adsorption hole to form a stable adsorption force.

[0059] When the suction cup 10 is working, an external suction device (such as a vacuum pump) draws air from the air passage 10f through the suction port 10c, creating a negative pressure environment inside the air passage 10f. This negative pressure is simultaneously transmitted along the air passage 10f to the electrode adsorption hole group 10e and the tab adsorption hole group 10d. The electrode adsorption hole group 10e uses the negative pressure to create a uniform and stable adsorption force on the electrode 2100, ensuring the electrode 2100 is flatly attached to the adsorption surface 10a of the suction cup 10, preventing wrinkles or edge warping of the electrode 2100 due to its own weight or vibration during handling. The tab adsorption hole group 10d uses the negative pressure to create a moderate adsorption force on each tab 2200, counteracting the warping tendency of the tabs 2200 and keeping them flush with the electrode 2100. During the transfer of the electrode assembly 2000, the electrode 2100 and the tab 2200 maintain a stable relative position under the action of their respective adapted adsorption forces, preventing the overall posture of the electrode assembly 2000 from shifting due to the warping of the tab 2200. When the electrode assembly 2000 is transferred to the target position (such as the correction platform or stacking stage 200), the suction device stops working, the negative pressure in the air passage 10f disappears, the adsorption force of the electrode adsorption hole group 10e and the tab adsorption hole group 10d is released, and the electrode assembly 2000 is placed stably, completing the transfer.

[0060] In summary, the suction cup 10 has an adsorption surface 10a and at least one set of suction air passages 10b, wherein the suction air passages 10b include an air inlet 10c, an electrode tab adsorption hole group 10d, an electrode plate adsorption hole group 10e, and an air channel 10f. The tab adsorption hole group 10d and the electrode adsorption hole group 10e are respectively opened on the adsorption surface 10a. They can form a negative pressure circuit connected to the air intake 10c through the air passage 10f, so that the suction cup 10 can simultaneously apply adsorption force to the electrode 2100 and the tab 2200. Among them, the electrode adsorption hole group 10e provides stable adsorption for the electrode 2100, ensuring that the electrode 2100 is flat and wrinkle-free during the transfer process. The tab adsorption hole group 10d adsorbs the tab 2200, effectively suppressing the warping tendency of the tab 2200 caused by its own stress, gravity or external interference. This solves the problem in related technologies that warping caused by the lack of adsorption of the tab 2200 leads to inaccurate stacking positioning, and ensures the stacking alignment accuracy of the electrode assembly 2000.

[0061] Because the tab 2200 is a thin sheet metal structure, its thickness is usually quite thin (typically 0.1mm-0.3mm), resulting in low mechanical strength. Excessive adsorption force can easily cause irreversible deformation of the tab 2200 (such as bending or wrinkling), affecting subsequent tab 2200 welding or busbar assembly. Meanwhile, the electrode 2100, coated with an active material layer, requires sufficient uniform negative pressure to ensure its overall flatness and adhesion. The active material layer is attached to the electrode substrate by an adhesive. If the negative pressure is insufficient, the electrode is prone to shaking and wrinkling during handling and processing, leading to frictional peeling and detachment of the active material layer from the substrate, or warping of the electrode 2100 edges. Therefore, a higher negative pressure is required to achieve tight fixation.

[0062] Therefore, in some embodiments, the negative pressure of the tab adsorption pore group 10d is configured to be lower than that of the electrode adsorption pore group 10e. By configuring the negative pressure of the tab adsorption pore group 10d to be lower than that of the electrode adsorption pore group 10e, the structural differences between the tab 2200 and the electrode 2100 can be accommodated. The tab 2200, as a thin sheet metal structure, can avoid deformation due to excessive adsorption force with a lower negative pressure, ensuring the reliability of subsequent welding, busbar and other processes. The electrode 2100, on the other hand, achieves tight adhesion with a higher negative pressure to prevent the active material layer from falling off, thus balancing adsorption stability and the structural integrity of the electrode assembly 2000.

[0063] like Figure 1 As shown, in some embodiments, the electrode adsorption pore group 10e includes a plurality of central adsorption pores 10e1 and a plurality of edge adsorption pores 10e2. The central adsorption pores 10e1 are formed on the adsorption surface 10a and are used to adsorb the central region of the electrode 2100; the edge adsorption pores 10e2 are formed on the adsorption surface 10a and are spaced apart from the plurality of central adsorption pores 10e1, and are used to adsorb the edge region of the electrode 2100.

[0064] Specifically, the distribution range of the central adsorption holes 10e1 covers the central area where the electrode 2100 and the adsorption surface 10a of the suction cup 10 actually contact, and is used to adsorb the central part of the electrode 2100 to ensure the adsorption stability of the central part of the electrode 2100; the edge adsorption holes 10e2 are spaced outside the multiple central adsorption holes 10e1, and their distribution range covers the edge area where the electrode 2100 and the adsorption surface 10a of the suction cup 10 actually contact, and are used to adsorb the edge part of the electrode 2100 to effectively prevent the edge of the electrode 2100 from warping.

[0065] like Figure 2 As shown, in some embodiments, along the intake direction of the intake air passage 10b ( Figure 2 (The middle arrow indicates the direction of air intake). The central adsorption hole 10e1 and the edge adsorption hole 10e2 are both located downstream of the tab adsorption hole group 10d.

[0066] With this design, the central adsorption hole 10e1 and the edge adsorption hole 10e2 are closer to the intake port 10c than the tab adsorption hole group 10d. When the suction device is working, the negative pressure is transmitted from the intake port 10c to each adsorption hole along the air passage 10f. During the flow of gas in the air passage 10f, pressure loss occurs due to the resistance of the air passage 10f, causing the negative pressure to gradually decrease from downstream (closer to the intake port 10c) to upstream (far from the intake port 10c). Specifically, the downstream central adsorption hole 10e1 and the edge adsorption hole 10e2, being closer to the intake port 10c, can obtain a more sufficient negative pressure supply, thus meeting the requirement of the electrode 2100 for a stronger adsorption force; while the upstream tab adsorption hole group 10d, due to the natural attenuation during the negative pressure transmission process, obtains a lower negative pressure than the downstream electrode adsorption hole group 10e. This negative pressure difference achieved through the airway 10f layout eliminates the need for additional pressure regulating valves, diverter valves, or other pressure regulating structures. It directly meets the design requirement that the negative pressure of the tab adsorption pore group 10d is lower than that of the electrode adsorption pore group 10e. This ensures the strong negative pressure required for electrode 2100 adsorption to maintain its flatness, while the lower negative pressure of the tab adsorption pore group 10d prevents the tab 2200 from deforming due to excessive force. This simplifies the structure while achieving adaptive adsorption for both the electrode 2100 and the tab 2200.

[0067] like Figure 2 As shown, in some embodiments, the intake airway 10b includes two tab adsorption hole groups 10d, and the air passage 10f includes: a main passage 10f1, a first branch passage 10f2, and a second branch passage 10f3. One end of the main passage 10f1 is connected to the intake port 10c, and the middle adsorption hole 10e1 and the edge adsorption hole 10e2 are both connected to the middle of the main passage 10f1; one end of the first branch passage 10f2 and the second branch passage 10f3 are both connected to the other end of the main passage 10f1, and the other ends of the first branch passage 10f2 and the second branch passage 10f3 are respectively connected to the two tab adsorption hole groups 10d.

[0068] Specifically, one of the tab adsorption hole groups 10d is connected to the other end of the first branch 10f2, and the other tab adsorption hole group 10d is connected to the other end of the second branch 10f3.

[0069] With the above design, the central adsorption hole 10e1 and the edge adsorption hole 10e2 in the middle of the main path 10f1 are closer to the air inlet 10c (downstream), while the two tab adsorption hole groups 10d connected by the first branch path 10f2 and the second branch path 10f3 are farther from the air inlet 10c (upstream). The downstream tab adsorption hole group 10e can obtain a stronger negative pressure to meet the requirement of stable adsorption force for the electrode 2100; the two upstream tab adsorption hole groups 10d form a lower negative pressure due to the natural decay of the negative pressure, which meets the design requirement that the negative pressure of the tab adsorption hole group 10d is less than that of the electrode adsorption hole group 10e. This ensures that the electrode 2100 has a strong negative pressure for adsorption to maintain its flatness, and the lower negative pressure of the tab adsorption hole group 10d prevents the tab 2200 from deforming due to excessive force.

[0070] Meanwhile, the first branch 10f2 and the second branch 10f3 correspond one-to-one with the two tab adsorption hole groups 10d, and can respectively adapt to the two tabs 2200 on the electrode 2100, so that each tab 2200 can obtain the appropriate adsorption force through the corresponding tab adsorption hole group, realize the adsorption of the bipolar tab 2200 structure, effectively suppress the warping trend of the two tabs 2200, and broaden the adaptability of the suction cup 10 to the multi-tab 2200 electrode assembly 2000.

[0071] In some embodiments, the pore size of the edge adsorption pore 10e2 is larger than that of the central adsorption pore 10e1.

[0072] Both the central adsorption hole 10e1 and the edge adsorption hole 10e2 are circular through holes, with the diameter of the edge adsorption hole 10e2 being larger than that of the central adsorption hole 10e1. Since the edges of the electrode 2100 are more prone to warping, the larger pore size of the edge adsorption hole 10e2 can increase the gas flow rate and effective range, generating stronger adsorption force and effectively suppressing edge warping, ensuring a tight fit between the edge of the electrode 2100 and the adsorption surface 10a of the suction cup 10. Conversely, the smaller pore size of the central adsorption hole 10e1 generates a gentler adsorption force, ensuring stable adsorption of the central part of the electrode 2100 while reducing damage to the surface active material layer of the electrode 2100 caused by excessive adsorption.

[0073] The working principle of the suction cup 10 in this application is as follows:

[0074] After the air intake device is activated, air is drawn from the air passage 10f through the air intake port 10c, creating a negative pressure in the air passage 10f. The negative pressure is transmitted through the main path 10f1 to the central adsorption hole 10e1 and the edge adsorption hole 10e2, adsorbing the central and edge areas of the electrode 2100. At the same time, it is transmitted through the first branch path 10f2 and the second branch path 10f3 to the tab adsorption hole group 10d, adsorbing the tab 2200. Since the tab adsorption hole group 10d is located upstream of the air passage 10f, its negative pressure is less than that of the electrode adsorption hole group 10e. The tab 2200 is stably adsorbed without deformation, and the electrode 2100 is firmly adsorbed and kept flat, thereby achieving stable gripping and transfer of the electrode assembly 2000.

[0075] like Figure 4 As shown, based on the same design concept, this application provides a correction device 100, which includes a correction mechanism 20, a first drive mechanism 30, a second drive mechanism 40, and a suction cup 10 from any of the above embodiments. The correction mechanism 20 is used to adjust the position of the electrode assembly 2000. The output end of the first drive mechanism 30 is equipped with the suction cup 10, and the first drive mechanism 30 drives the suction cup 10 to move, so as to transfer the electrode assembly 2000 on the conveying device 300 to the correction mechanism 20. The output end of the second drive mechanism 40 is equipped with the suction cup 10, and the second drive mechanism 40 drives the suction cup 10 to move, so as to transfer the electrode assembly 2000 on the correction mechanism 20 to the stacking stage 200.

[0076] Specifically, the first drive mechanism 30 uses the suction cup 10 to transfer the electrode assembly 2000, which may have positional deviations such as offset or tilt, from the conveying device 300 to the correction mechanism 20. The correction mechanism 20 corrects these deviations, restoring the electrode assembly 2000 to the preset precise position and posture to meet the requirements of the stacking process. Then, the second drive mechanism 40 uses the suction cup 10 to transfer the calibrated electrode assembly 2000 to the stacking table 200 to avoid misalignment or poor alignment of the electrode assembly 2000 due to positional deviations, thereby ensuring the quality stability of the stacking process.

[0077] The correction mechanism 20 has various structural forms, which are known to those skilled in the art, and this application does not specifically limit it. In some embodiments, the correction mechanism 20 includes a correction platform, a driving component, a detection component, and a controller. The correction platform is used to carry the electrode assembly 2000, and the first driving mechanism 30 transfers the electrode assembly 2000 on the conveying device 300 to the correction platform. The detection component includes a light source and a camera. The light source is set above the correction platform to provide uniform and stable illumination; the camera is set at a corresponding position above the correction platform and can perform omnidirectional detection of the position of the electrode assembly 2000. The controller is electrically connected to both the driving component and the camera. It processes the image information fed back by the camera through a visual algorithm, calculates the offset of the electrode assembly 2000 in the X and Y directions, and then controls the driving component to move the correction platform along the X and Y directions to adjust the position of the electrode assembly 2000 on it, ensuring that the electrode assembly 2000 reaches the preset positioning accuracy requirements before entering the stacking process. In some embodiments, the camera is a charge-coupled device camera, also known as a CCD camera.

[0078] The first drive mechanism 30 can be mounted on the frame of the correction device 100. It can be a multi-axis manipulator or a linear module, etc., and its output end is fixedly connected to the suction cup 10, used to drive the suction cup 10 to move along the X, Y, and Z directions. Specifically, the first drive mechanism 30 first moves the suction cup 10 to the electrode assembly 2000 on the conveying device 300, and uses the negative pressure generated by the suction cup 10 to adsorb the electrode assembly 2000; then it drives the suction cup 10 to carry the adsorbed electrode assembly 2000 to above the correction platform of the correction mechanism 20; finally, it releases the negative pressure, allowing the electrode assembly 2000 to be stably placed on the correction platform, thus completing the transfer of the electrode assembly 2000 from the conveying device 300 to the correction platform. It should be noted that the X, Y, and Z directions are perpendicular to each other.

[0079] Similarly, the second drive mechanism 40 can also be installed on the frame of the correction device 100. It can also be a multi-axis robot or a linear module, etc. Its output end is fixedly connected to the suction cup 10 and is used to drive the suction cup 10 to move along the X, Y and Z directions. Specifically, the second drive mechanism 40 first drives the suction cup 10 to the position of the electrode assembly 2000 after position calibration on the correction platform of the correction mechanism 20, and the electrode assembly 2000 is adsorbed by the negative pressure generated by the suction cup 10. Then, the suction cup 10 is driven to carry the adsorbed electrode assembly 2000 to move above the stacking table 200. Finally, the negative pressure is released so that the electrode assembly 2000 is placed stably on the stacking table 200, thereby completing the transfer of the electrode assembly 2000 from the correction platform to the stacking table 200.

[0080] like Figure 4As shown, based on the same design concept, this application embodiment also provides a stacking device 1000, including a stacking table 200, a conveying device 300, and the aforementioned correction device 100. The stacking table 200 is used to support the electrode assembly 2000. The conveying device 300 is used to convey the electrode assembly 2000.

[0081] The conveying device 300, such as a belt conveyor or roller conveyor, is used to transport the electrode assembly 2000 to be stacked to the gripping area of ​​the first drive mechanism 30 of the correction device 100. The stacking table 200 is used to support the stacked electrode assembly 2000. The stacking table 200 can be lifted and lowered along the Z-axis to accommodate battery cell stacks of different thicknesses.

[0082] In some embodiments, the stacking equipment 1000 includes two conveying devices 300 and two sets of correction devices 100, both sets of correction devices 100 being located between the two conveying devices 300, and the correction devices 100 and the conveying devices 300 being correspondingly arranged; the stacking table 200 is arranged between the two sets of correction devices 100.

[0083] Two conveying devices 300 can independently convey different types of electrode assemblies 2000 (e.g., one side conveys positive electrode assemblies, and the other side conveys negative electrode assemblies), achieving synchronous supply of positive and negative electrode assemblies; two sets of correction devices 100 are symmetrically arranged between the two conveying devices 300, and each set of correction devices 100 corresponds one-to-one with one conveying device 300, such as... Figure 4 As shown, the upper correction device 100 is connected to the upper conveyor device 300, and the lower correction device 100 is connected to the lower conveyor device 300, ensuring that the electrode assembly 2000 conveyed by each conveyor device 300 can be conveyed to the corresponding correction platform for calibration. The stacking stage 200 is located between the two sets of correction devices 100.

[0084] With this design, on the one hand, the two conveying devices 300 can work in parallel, continuously conveying the electrode assembly 2000 to be processed to the corresponding correction device 100, avoiding the bottleneck of waiting on a single conveyor line and improving the supply efficiency of electrode 2100; on the other hand, each correction device 100 independently processes the electrode assembly 2000 of its corresponding conveying device 300, and can flexibly adjust the correction parameters for different types of electrode assembly 2000 to ensure their respective positioning accuracy. The stacking stage 200 located in the center can alternately receive the calibrated electrode assembly 2000 transferred from the two correction devices 100, realizing the orderly alternating stacking of positive and negative electrode 2100; combined with the lifting function of the stacking stage 200 along the Z-axis, it can adapt to changes in the stacking thickness, so that each layer of electrode assembly 2000 is precisely aligned, ultimately improving the overall consistency of the cell stacking.

[0085] In some embodiments, two conveying devices 300 are arranged opposite each other along the Y direction, and the conveying devices 300 extend along the X direction. Two correction devices 100 are also arranged opposite each other along the Y direction.

[0086] like Figure 5 As shown, in some embodiments, the stacking apparatus 1000 further includes a coating device 400 for disposing a diaphragm 3000 between two adjacent electrode assemblies 2000.

[0087] The coating device 400 is installed above the stacking table 200 to place the diaphragm 3000 between two adjacent electrode assemblies 2000, thereby achieving insulation isolation between the electrode assemblies 2000.

[0088] The structure of the coating device 400 is diverse and known to those skilled in the art, and is not limited thereto in this application. Figure 5 As shown, the laminating device 400 may include components such as a diaphragm reel, a traction roller, a tension pendulum, and a cutting knife. The diaphragm reel is used to hold the diaphragm 3000. The traction roller drives the diaphragm 3000 to be conveyed to the stacking table 200. The tension pendulum drives the diaphragm 3000 to reciprocate along the Y direction. The cutting knife is used to cut the diaphragm 3000 according to the stacking requirements.

[0089] In some embodiments, the coating device 400 and two correction devices 100 cooperate in a coordinated manner. Specifically, after the second drive mechanism 40 of one correction device 100 adsorbs an electrode assembly 2000 and precisely places it on the stacking stage 200, the tension pendulum of the coating device 400 drives the diaphragm 3000 to move along the Y direction, so that the diaphragm 3000 completely covers the surface of the electrode assembly 2000. Then, the second drive mechanism 40 of the other correction device 100 adsorbs another electrode assembly 2000 and aligns it on top of the electrode assembly 2000 that has been covered with the diaphragm. Subsequently, the tension pendulum of the coating device 400 drives the diaphragm 3000 to move in the opposite direction along the Y direction, so that the diaphragm 3000 covers the surface of the newly placed electrode assembly 2000 again. At the same time, the stacking stage 200 synchronously descends along the Z direction to correspond to the total thickness of the electrode assembly 2000 and the diaphragm 3000, adapting to the stacking requirements of the next layer. This process is repeated continuously, achieving an orderly alternating Z-axis stacking of electrode modules 2000, diaphragm 3000, electrode modules 2000, and diaphragm 3000, ensuring the insulation and isolation effect between adjacent electrode modules 2000.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A suction cup, characterized in that, An electrode assembly (2000) for adsorbing battery cells, the electrode assembly (2000) including an electrode (2100) and a tab (2200), the suction cup (10) having an adsorption surface (10a) and at least one set of suction air passages (10b), the suction air passages (10b) including: An air intake (10c) is provided on the suction cup (10) for connection with the air intake device; A tab adsorption pore group (10d) is formed on the adsorption surface (10a) and is used to adsorb the tab (2200). An electrode adsorption pore group (10e) is formed on the adsorption surface (10a) and is used to adsorb the electrode (2100). Air passage (10f), which is opened in the suction cup (10) and connected to the air inlet (10c), the electrode tab adsorption hole group (10d) and the electrode adsorption hole group (10e).

2. The suction cup according to claim 1, characterized in that, The negative pressure of the tab adsorption pore group (10d) is configured to be less than the negative pressure of the electrode adsorption pore group (10e).

3. The suction cup according to claim 1, characterized in that, The electrode adsorption pore group (10e) includes: Multiple central adsorption holes (10e1) are provided on the adsorption surface (10a) for adsorbing the central region of the electrode (2100). Multiple edge adsorption holes (10e2) are formed on the adsorption surface (10a) and spaced apart from the multiple central adsorption holes (10e1). The edge adsorption holes (10e2) are used to adsorb the edge area of ​​the electrode (2100).

4. The suction cup according to claim 3, characterized in that, Along the suction direction of the suction path (10b), the central adsorption hole (10e1) and the edge adsorption hole (10e2) are both located downstream of the tab adsorption hole group (10d).

5. The suction cup according to claim 4, characterized in that, The intake airway (10b) includes two of the tab adsorption hole groups (10d), and the air passage (10f) includes: The main path (10f1) is connected at one end to the air intake (10c), and the central adsorption hole (10e1) and the edge adsorption hole (10e2) are both connected to the middle of the main path (10f1); The first branch (10f2) and the second branch (10f3) are connected at one end to the other end of the main path (10f1), and at the other end to the two tab adsorption hole groups (10d).

6. The suction cup according to claim 4, characterized in that, The diameter of the edge adsorption pore (10e2) is larger than that of the central adsorption pore (10e1).

7. A correction device, characterized in that, include: The alignment mechanism (20) is used to adjust the position of the electrode assembly (2000); The suction cup (10) according to any one of claims 1-6; The first drive mechanism (30) has the suction cup (10) installed at its output end. The first drive mechanism (30) drives the suction cup (10) to move so as to transfer the electrode assembly (2000) on the conveying device (300) to the correction mechanism (20). The second drive mechanism (40) has the suction cup (10) installed at its output end. The second drive mechanism (40) drives the suction cup (10) to move so as to transfer the electrode assembly (2000) on the correction mechanism (20) to the stacking stage (200).

8. A stacking device, characterized in that, include: The correction device (100) according to claim 7; A stacking stage (200) is used to support the electrode assembly (2000). A conveying device (300) is used to convey the electrode assembly (2000).

9. The stacking equipment according to claim 8, characterized in that, The stacking equipment (1000) includes two conveying devices (300) and two sets of correction devices (100). The two sets of correction devices (100) are located between the two conveying devices (300), and the correction devices (100) and the conveying devices (300) are arranged correspondingly. The stacking table (200) is arranged between the two sets of correction devices (100).

10. The stacking apparatus according to claim 9, characterized in that, The stacking device (1000) further includes: A coating device (400) is used to place a diaphragm (3000) between two adjacent electrode assemblies (2000).

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