A rubber bonding device

Abstract

The utility model relates to battery assembling technical field, concretely provides a kind of rubber bonding device, comprising: first rubber bonding component, drive assembly and second rubber bonding component;Drive assembly is used to drive first rubber bonding component reciprocating movement in first direction, first rubber bonding component is used to rubber bonding to battery cell, and first direction is perpendicular to the surface of battery cell;Drive assembly is used to drive second rubber bonding component to move in first direction and second direction, and second direction exists included angle with first direction, and second rubber bonding component is used to rubber bonding to the tab on battery cell, to solve the problem that rubber bonding device in the related art rubber bonding after adhesive tape can be in the state of being pulled all the time and lead to tab easy to crack.

Description

Technical Field

[0001] This utility model relates to the field of battery assembly technology, and in particular to an adhesive applicator. Background Technology

[0002] In the battery production and assembly process, after X-ray inspection of the bare cells, the copper and aluminum tabs of the two cells need to be welded together using ultrasonic welding. After ultrasonic welding, the copper-aluminum adapter plate needs to be welded to the positive and negative terminals on the top cover. After the adapter plate is welded, the side-wing-type auxiliary fixing structure extending from the top cover body needs to be flipped up, similar to wings, to hold and fix the tabs and adapter plate. During the flipping process, because some of the tabs are raised, the wings are prone to damaging the tabs when they come into contact with them. Therefore, after ultrasonic welding and before the adapter plate welding, tape needs to be applied to the tabs and the weld marks from ultrasonic welding.

[0003] To accommodate the thinness and lightness of the tape and enhance its versatility, the tape application device uses vacuum adsorption to adsorb the tape. However, during the application process, the tape is taut and mainly adheres to the solder joints, making it difficult to bond with the battery cell surface. After application, the tape remains stretched, which can cause the tabs to crack easily, hindering the improvement of product yield and the reduction of manual rework.

[0004] There is currently no effective solution to the problem that the adhesive tape is constantly under tension after the adhesive is applied in the relevant technology, which makes the tabs prone to cracking. Utility Model Content

[0005] The present invention provides an adhesive application device that at least solves the problem in the related art where the adhesive tape is constantly in a stretched state after application, causing the tabs to crack easily.

[0006] According to one aspect of the present invention, an adhesive application device is provided, comprising a first adhesive application component 1, a driving component 2, and a second adhesive application component 3; the driving component 2 is used to drive the first adhesive application component 1 to reciprocate in a first direction, the first adhesive application component 1 being used to apply adhesive to a battery cell 4, the first direction being perpendicular to the surface of the battery cell 4; the driving component 2 is used to drive the second adhesive application component 3 to move in a first direction and a second direction, the second direction having an angle with the first direction, the second adhesive application component 3 being used to apply adhesive to the tabs 7 on the battery cell 4.

[0007] As an optional solution, the drive assembly 2 includes a mounting plate 21 movable in a first direction. The mounting plate 21 is provided with a vertical first mounting surface 211 and a second mounting surface 212. The first mounting surface 211 is parallel to the first direction. The first adhesive application assembly 1 is slidably connected to the first mounting surface 211 along the first direction. The second adhesive application assembly 3 is slidably connected to the second mounting surface 212 along the second direction.

[0008] As an optional solution, an elastic element 51 is also provided between the first adhesive assembly 1 and the mounting plate 21; the first adhesive assembly 1 has a groove on the side facing the first mounting surface 211; the elastic element 51 is connected to the first mounting surface 211 through the connector 52, and the elastic element 51 is disposed in the groove.

[0009] As an alternative, the elastic element 51 is a spring, with one end of the spring connected to the end of the groove near the second adhesive assembly 3, and the other end of the spring connected to the first mounting surface 211 via the connector 52.

[0010] As an optional solution, it also includes a guide 61 and a bearing 62; the guide 61 is connected to the first adhesive application assembly 1, and the guide 61 is provided with a guide groove 63; the bearing 62 is fixedly connected to the second adhesive application assembly 3, and the bearing 62 is disposed in the guide groove 63.

[0011] As an alternative, the second adhesive assembly 3 has an avoidance structure on the side facing the tab 7.

[0012] As an alternative, the clearance structure 31 is a groove, and the clearance structure 31 connects the opposite sides of the side of the second adhesive assembly 3 facing the tab 7.

[0013] As an alternative, the second adhesive assembly 3 has a contoured end 32 on the side facing the tab 7, and the contoured end 32 is located at the end of the second adhesive assembly 3 near the first adhesive assembly 1.

[0014] As an optional solution, the first adhesive application assembly 1 includes a first adhesive suction head, and the second adhesive application assembly 3 includes a second adhesive suction head, with vacuum channels provided inside the first and second adhesive suction heads.

[0015] As an optional solution, the side of the first adhesive suction head facing the battery cell 4 and the side of the second adhesive suction head facing the electrode tab 7 are provided with adsorption holes arranged at intervals, and the vacuum pipeline is connected to the adsorption holes.

[0016] The adhesive applicator provided in this embodiment controls a first adhesive applicator component and a second adhesive applicator component through a drive component, achieving adhesion of the electrode tab to the battery cell without pulling the electrode tab. Specifically, the drive component moves the first adhesive applicator component reciprocally in a first direction to apply adhesive to the battery cell, while the drive component moves the second adhesive applicator component in both the first and second directions, allowing the electrode tab to adhere to the battery cell, thus improving the adhesion between the electrode tab and the battery cell. This separates the adhesive application tasks from those on the battery cell surface, and the motion trajectory is designed for the geometric features of different parts, improving the adhesive application quality. It effectively solves the technical problem that the electrode tab is constantly in a pulled state after adhesive application, leading to easy cracking of the electrode tab. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram showing the position between an adhesive applicator and a battery cell in an embodiment of this utility model.

[0018] Figure 2 It is the existing adhesive application device and Figure 1 A schematic diagram showing the comparison of the adhesive application effect of the adhesive application device.

[0019] Figure 3 yes Figure 1 An exploded view of the adhesive application device shown.

[0020] Figure 4 yes Figure 1 The diagram shows the structure of the adhesive applicator.

[0021] Figure 5 This is a schematic diagram of the morphology of the second adhesive component in an embodiment of this utility model.

[0022] The above figures include the following reference numerals: 1. First adhesive bonding assembly; 2. Drive assembly; 3. Second adhesive bonding assembly; 4. Battery cell; 7. Electrode tab; 8. Adhesive tape; 21. Mounting plate; 211. First mounting surface; 212. Second mounting surface; 22. First slider; 23. First guide rail; 24. Second slider; 25. Second guide rail; 51. Elastic component; 52. Connecting component; 61. Guide component; 62. Bearing; 63. Guide groove; 31. Avoidance structure; 32. Contour end. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] In related technologies, during the battery production and assembly process, adhesive tape 8 needs to be applied to the tabs and the weld marks from ultrasonic welding. To accommodate the thinness and lightness of the adhesive tape 8 and enhance its versatility, the adhesive application device uses vacuum adsorption to pick up the adhesive tape 8, such as... Figure 2 As shown, during the pressing and applying of adhesive, the tape 8 is in a taut state, and the tape 8 is mainly at the solder joint, which cannot adhere to the surface of the battery cell 4. After the adhesive is applied, the tape 8 will always be in a tensile state, which will cause the tab 7 to crack easily, which is not conducive to improving the product yield and reducing the rework rate.

[0027] To address the aforementioned problems, this utility model discloses an adhesive applicator to solve the technical problem that the adhesive tape 8 remains in a stretched state after the adhesive is applied, causing the tab 7 to easily crack.

[0028] See Figures 1 to 5 As shown, this application provides an adhesive application device, including a first adhesive application component 1, a driving component 2, and a second adhesive application component 3. The driving component 2 is used to drive the first adhesive application component 1 to reciprocate in a first direction X, where the first adhesive application component 1 is used to apply adhesive to a battery cell 4, and the first direction X is perpendicular to the surface of the battery cell 4. The driving component 2 is also used to drive the second adhesive application component 3 to move in a first direction X and a second direction Y, where the second direction Y forms an angle with the first direction X, and the second adhesive application component 3 is used to apply adhesive to the tabs 7 on the battery cell 4. The driving component 2 can be driven, but is not limited to, using a slider + guide rail or a lead screw + nut. In this embodiment, the slider + guide rail method is preferred and will be described in detail below.

[0029] The first adhesive application component 1 reciprocates, and after a single adhesive application action is completed, the first adhesive application component 1 automatically returns to its initial position, preparing for the next adhesive application cycle and improving the cycle efficiency of the equipment.

[0030] The motion design, with the first direction X perpendicular to the surface of the battery cell 4, is suitable for applying uniform pressure to the plane of the battery cell 4, ensuring that the tape 8 is tightly adhered to the surface of the battery cell 4, and avoiding air bubbles or loose adhesion.

[0031] The drive component 2 controls the second adhesive application component 3 to move in the first direction X and the second direction Y. The multi-directional movement capability enables the second adhesive application component 3 to adapt to the three-dimensional structure of the connection between the tab 7 and the battery cell 4, and to achieve full coverage adhesive application in complex areas such as the base of the tab 7.

[0032] The drive component 2 controls the second adhesive application component 3 to move laterally along the second direction Y, so that the movement trajectory of the second adhesive application component 3 completely avoids the exposed or easily accessible areas of the separator. When the tab 7 is being applied, the second adhesive application component 3 only moves in the lateral area where the tab 7 extends out of the cell 4, away from the edge of the separator of the cell 4 body. Even if the cell 4 has a small dimensional tolerance, the controllability of the lateral movement can be limited by the preset stroke, preventing the second adhesive application component 3 from rubbing against the separator due to positional deviation, thus eliminating friction and powder shedding from the physical contact level.

[0033] The tab 7 is a conductive metal component extending from the main body of the battery cell 4. The tab 7 is not completely perpendicular or parallel to the surface of the battery cell 4. The second direction Y forms an angle with the first direction X, which allows the movement trajectory of the second adhesive assembly 3 to conform to the spatial shape of the tab 7. For example, if the tab 7 is tilted or bent, the movement along the second direction Y can cover different areas such as the side and root of the tab 7, realizing the complex adhesive tape 8 adhesion and wrapping the key parts connecting the tab 7 and the battery cell 4.

[0034] The second direction Y forms an angle with the first direction X, allowing the device to adapt to the bonding requirements of different types of battery cells and different tab designs by adjusting the angle and the motion parameters of the second direction Y. This eliminates the need for significant hardware replacements, improving the device's compatibility with diverse battery production scenarios and facilitating subsequent adjustments to the motion trajectory based on process optimizations. The different types of battery cells include prismatic cells and cylindrical cells. The different tab designs include tabs with varying lengths, thicknesses, and bend angles.

[0035] In this embodiment, the first adhesive application component 1 and the second adhesive application component 3 are controlled by the drive component 2 to separate the adhesive application tasks from the surface of the battery cell 4 and the tabs 7. Motion trajectories are designed for the geometric features of different parts to improve adhesive application quality. After the first adhesive application component 1 completes the adhesive application on the surface of the battery cell 4, the second adhesive application component 3 immediately applies adhesive to the tabs 7, shortening the adhesive application cycle of the battery cell 4. By adjusting the angle between the second direction Y and the first direction X, the adhesive application requirements of tabs 7 of different specifications can be adapted, reducing equipment modification costs.

[0036] The adhesive applicator provided in this embodiment controls the first adhesive applicator 1 and the second adhesive applicator 3 through the drive component 2, so as to achieve the state in which the tape 8 adheres to the battery cell 4 without pulling the tab 7.

[0037] Specifically, the drive component 2 drives the first adhesive application component 1 to reciprocate in the first direction X to apply adhesive to the battery cell 4. The drive component 2 drives the second adhesive application component 3 to move in the first direction X and the second direction Y, so that the tape 8 is applied to the tab 7 and the battery cell 4, thereby improving the adhesion between the tape 8 and the battery cell 4 and the tab 7.

[0038] This separates the task of applying adhesive to the surface of the battery cell 4 from that of the tab 7. The motion trajectory is designed according to the geometric features of different parts, which improves the quality of adhesive application and effectively solves the technical problem that the adhesive tape 8 is always in a tensile state after the adhesive application device applies the adhesive, which causes the tab 7 to crack easily.

[0039] like Figure 1 , Figure 3 and Figure 4 As shown, as an optional solution, the drive assembly 2 includes a mounting plate 21 that is movable in the first direction X. The mounting plate 21 is provided with a vertical first mounting surface 211 and a second mounting surface 212. The first mounting surface 211 is parallel to the first direction X. The first adhesive component 1 is slidably connected to the first mounting surface 211 along the first direction X. The second adhesive component 3 is slidably connected to the second mounting surface 212 along the second direction Y.

[0040] Taking the driving component 2, which uses a slider + guide rail method for driving, as an example, the driving component 2 includes a mounting plate 21, a first slider 22, a first guide rail 23, a second slider 24, and a second guide rail 25. The first slider 22 and the first guide rail 23 are installed between the mounting plate 21 and the first adhesive application component 3, with the first guide rail 23 nested within the first slider 22. The second slider 24 and the second guide rail 25 are installed between the mounting plate 21 and the second adhesive application component 3, with the second guide rail 25 inserted into the second slider 24.

[0041] Mounting plate 21 serves as the common support base for drive assembly 2. First guide rail 23 and first slider 22 are responsible for constraining the movement trajectory of first adhesive application assembly 1. Second guide rail 25 and second slider 24 constrain second adhesive application assembly 3, so that the two adhesive application actions are precise and do not interfere with each other, ensuring the positional accuracy of tab 7 when applying adhesive tape 8.

[0042] The first adhesive application assembly 1 is mounted on the first mounting surface 211 via the first slider 22 and the first guide rail 23, with the first guide rail 23 extending in the first direction X; the second adhesive application assembly 3 is mounted on the second mounting surface 212 via the second slider 24 and the second guide rail 25, with the second guide rail 25 extending in the second direction Y.

[0043] That is, the first slider 22 is fixed on the first adhesive assembly 1, the first guide rail 23 is fixed on the mounting plate 21, and the first guide rail 23 passes through the middle of the first slider 22, so that the first slider 22 and the first guide rail 23 can move back and forth in the first direction X, thereby achieving the effect of the drive assembly 2 driving the first adhesive assembly 1 to move back and forth in the first direction X.

[0044] The second slider 24 is fixed on the second adhesive assembly 3, and the second guide rail 25 is fixed on the mounting plate 21. The second guide rail 25 passes through the middle of the second slider 24, so that the second slider 24 and the second guide rail 25 can reciprocate in the second direction Y, thereby achieving the effect of driving the second adhesive assembly 3 to reciprocate in the second direction Y.

[0045] As described above, the mounting plate 21 serves as the common support base for the drive assembly 2. The mounting plate 21 can move along the first direction X, providing a basic motion carrier for the first adhesive assembly 1 and the second adhesive assembly 3. The perpendicular arrangement of the first mounting surface 211 and the second mounting surface 212 provides independent mounting references for the two sets of guide rail sliders, achieving physical isolation of the movement direction and avoiding motion interference.

[0046] The first mounting surface 211 has a plurality of continuously arranged mounting holes for fixing the first guide rail 23 to the first mounting surface 211. The first guide rail 23 passes through the middle of the first slider 22, and the first guide rail 23 and the first slider 22 can reciprocate. The first adhesive assembly 1 is mounted on the first mounting surface 211 via the first slider 22 and the first guide rail 23.

[0047] Since the direction of the first guide rail 23 is consistent with the direction of movement of the mounting plate 21, the first adhesive application component 1 can move in the first direction X, adapting to the adhesive application requirements of the surface of the battery cell 4 in the vertical direction.

[0048] The second mounting surface 212 is provided with mounting holes for fixing the second guide rail 25 to the second mounting surface 212. The second guide rail 25 passes through the middle of the second slider 24, and the second guide rail 25 and the second slider 24 can reciprocate. The second adhesive assembly 3 is mounted on the second mounting surface 212 via the second slider 24 and the second guide rail 25.

[0049] The first adhesive application component 1 is directly connected to the first slider 22 in the drive component 2, converting the power of the drive component 2 (i.e., the power from the servo motor, cylinder, and other drive sources) into a reciprocating motion in the first direction X. This uniform movement in the first direction X continuously and smoothly applies the adhesive tape 8 to the battery cell 4. The reciprocating motion of the first adhesive application component 1 allows it to automatically return to its initial position after each application cycle, preparing for the next cycle and improving the equipment's cycle efficiency. When the mounting plate 21 moves along the first direction X, the second adhesive application component 3 simultaneously moves along the second direction Y. The combined motion of these two components forms a composite trajectory for the tab 7. This design achieves an angular relationship between the motion directions through a mechanical structure. Besides directly forming an angular relationship through physical structure, the basic motion can also be transformed into a composite motion with an angle through a transmission mechanism or control logic.

[0050] The structure of the guide rail passing through the middle of the slider can reduce motion resistance by utilizing the ball or roller structure of the slider, making the start-stop and movement of the adhesive application component smoother. It can also resist the lateral force during the adhesive application process through the rigid support of the guide rail, such as the lateral component force when pressing the adhesive tape, to prevent the component from shaking and affecting the adhesive application quality.

[0051] In this embodiment, the movement of the drive component 2 in each direction is constrained by an independent guide rail slider, which can ensure the straightness and repeatability of the movement trajectory. The separate design makes the motion inertia of the two adhesive components independent of each other, reducing the vibration and error caused by the mutual influence and correlation of the motion states of the two moving parts.

[0052] The drive component 2 can also use a combination of servo motor and ball screw to achieve continuous and smooth speed adjustment, ensure stable tension of tape 8, and avoid pasting deviation caused by inertia.

[0053] like Figures 1 to 5 As shown, as an optional solution, an elastic element 51 is also provided between the first adhesive component 1 and the mounting plate 21; the first adhesive component 1 has a groove on the side facing the first mounting surface 211; the elastic element 51 is connected to the first mounting surface 211 through the connector 52, and the elastic element 51 is disposed in the groove.

[0054] The elastic element 51 is embedded in the groove of the first adhesive assembly 1 and connected to the first mounting surface 211 via the connector 52. This avoids damage caused by exposed elastic element 51 and saves overall space, conforming to the principle of compact design. This installation structure of the elastic element 51 ensures that the elastic force can be accurately transmitted along the first direction X, avoiding interference from lateral forces on the adhesive application accuracy.

[0055] When the first adhesive application assembly 1 presses against the surface of the battery cell 4 along the first direction X, the elastic element 51 can absorb the impact force through its own deformation, preventing the adhesive application pressure from being too high and damaging the battery cell 4. At the same time, if there are small protrusions on the surface of the battery cell 4, the buffering effect of the elastic element 51 can reduce local stress concentration.

[0056] The elastic element 51 can transform rigid contact into flexible contact. When there is a slight tolerance in the thickness of the battery cell 4, the elastic element 51 can automatically compensate through the change in compression to ensure that the adhesive pressure on the surface of different battery cells is consistent, such as being stable at 5-10N, so as to avoid the tape 8 not adhering properly or producing air bubbles due to uneven pressure.

[0057] Although the first guide rail 23 and the first slider 22 have ensured the motion accuracy in the first direction X, a small gap may appear after long-term use. The elastic force of the elastic element 51 can eliminate this gap, ensuring that the first adhesive assembly 1 is always in close contact with the first guide rail 23 during reciprocating motion, reducing the impact of vibration or movement on the accuracy of the adhesive application position.

[0058] like Figures 1 to 5 As shown, as an optional solution, the elastic element 51 is a spring, one end of which is connected to the end of the groove near the second adhesive assembly 3, and the other end of which is connected to the first mounting surface 211 via the connector 52.

[0059] The specific type of elastic element 51 can be selected based on the application scenario. If the adhesive application pressure is fixed, such as for a single cell model, a cylindrical spring can be selected; if the pressure needs frequent adjustment, a gas spring can be selected; if the pressure is extremely low, a combination of wave spring and rubber pillar can be selected. For soft-pack cells, rubber or polyurethane pillars are preferred to prevent pressure damage; for hard-shell cells, cylindrical springs or disc springs can be selected to improve efficiency. In high-temperature environments, such as when applying adhesive after preheating the cell, silicone rubber pillars or metal springs can be selected; in oily environments, polyurethane or galvanized springs can be selected.

[0060] The first mounting surface 211 of the mounting plate 21 has a plurality of continuously arranged mounting holes for fixing the connector 52 to the first mounting surface 211. The two ends of the spring are respectively fixed to the groove and the connector 52. The groove is on the first adhesive assembly 1, and the connector 52 is fixed to the first mounting surface 211 of the mounting plate 21, meaning the two ends of the spring are respectively fixed to the first adhesive assembly 1 and the mounting plate 21. This arrangement of fixing the spring to the groove ensures that the spring's extension and contraction direction is strictly along the first direction X, avoiding lateral force interference with the movement trajectory of the adhesive assembly.

[0061] The pre-compression of the spring can be precisely controlled by the connector 52, for example, by compressing it by 2mm to 5mm, thereby setting the pre-applied force on the cell 4, such as 5N to 10N, to ensure that the first adhesive assembly 1 is always in close contact with the first guide rail 23 and to eliminate gaps.

[0062] As the spring is further compressed, the elastic force increases with the amount of compression, providing continuous and increasing pressure to the first adhesive assembly 1, ensuring that the tape 8 adheres tightly to the surface of the battery cell 4. This gradual pressure characteristic prevents instantaneous high voltage from damaging the battery cell 4.

[0063] The spring releases its compression, and the elastic force pushes the adhesive assembly to quickly reset while maintaining contact with the guide rail, thus avoiding vibration or offset caused by inertia during the return stroke.

[0064] like Figures 1 to 5 As shown, as an optional solution, the above device further includes a guide 61 and a bearing 62; the guide 61 is connected to the first adhesive application assembly 1, and the guide 61 is provided with a guide groove 63; the bearing 62 is fixedly connected to the second adhesive application assembly 3, and the bearing 62 is disposed in the guide groove 63.

[0065] The guide member 61 is fixedly connected to the first adhesive application assembly 1 and moves with the first adhesive application assembly 1; the bearing 62 is fixedly connected to the second adhesive application assembly 3 and moves with the second adhesive application assembly 3; the bearing 62 is embedded in the guide groove 63 to form a sliding constraint, thus constructing a motion correlation channel between the two sets of adhesive application assemblies. This design achieves the transmission of motion information through mechanical contact without affecting the independent movement of the two sets of assemblies.

[0066] When the first adhesive application assembly 1 moves in the first direction X and the second adhesive application assembly 3 moves in the first direction X and the second direction Y, the guide groove 63 restricts the displacement range of the bearing 62, allowing the first adhesive application assembly 1 and the second adhesive application assembly 3 to maintain a preset geometric relationship, thereby making the tape 8 fit more closely to the base of the battery cell 4 and the electrode tab 7, thus solving the problem. Figure 2 As shown, in the related technology, the tape 8 cannot be tightly attached to the connection between the base of the tab 7 and the cell 4, and the tape 8 tears the tab 7 during the handling and relocation of the cell 4, causing it to crack.

[0067] The rolling contact between bearing 62 and guide groove 63 can transmit appropriate lateral force, compensate for minor misalignments caused by installation errors between the two sets of components, and reduce motion resistance by utilizing rolling friction, thus avoiding jamming or vibration during mutual movement. When the adhesive applicator starts and stops quickly, the rolling contact can buffer instantaneous impacts, guide the movement direction of the components, and make the change in movement direction during start-up and shutdown smoother, thereby protecting the guide rail and slider.

[0068] The guide groove 63 can be designed as a straight line, an L-shape, or a curve. This embodiment uses a straight guide groove 63, allowing for the calculation of the relative motion trajectory and ensuring that the guide groove 63 forms a certain angle with the first direction X. After the large surface of the battery cell 4 is coated with adhesive, due to the guiding effect of the bearing 62, the second adhesive application assembly 3 continuously moves towards the diaphragm of the battery cell 4 during the descent process. When the tab 7 is coated with adhesive, the side of the second adhesive application assembly 3 is precisely aligned with the end face of the tab deep within the battery cell 4, completing the adhesive application at the connection between the base of the tab 7 and the battery cell 4. This achieves perfect adhesion of the tape 8 to the diaphragm of the battery cell 4 and the tab 7, preventing the tape 8 from tearing the tab 7 and causing cracking.

[0069] like Figures 1 to 5 As shown, as an optional solution, the second adhesive assembly 3 has an avoidance structure on the side facing the tab 7.

[0070] After ultrasonic welding, the tab 7 will form a weld area on its surface. This weld area may contain metal weld protrusions, microcracks, or brittle weld layers, and its surface flatness is much lower than other areas of the tab 7. The pressure applied during the application of adhesive to the second adhesive assembly 3 is directly applied to the weld protrusions, which may cause the brittle weld layer of the weld to break or the microcracks to expand, leading to weld cracking.

[0071] The avoidance structure is designed at the position corresponding to the solder mark area of ​​the second adhesive assembly 3 and the tab 7, ensuring that the second adhesive assembly 3 can only apply adhesive pressure to the non-solder mark area of ​​the tab 7. During adhesive application, the force of the second adhesive assembly 3 is entirely concentrated on the non-solder mark area of ​​the tab 7, while the area corresponding to the avoidance structure remains in non-contact with the tab 7. This design ensures that the adhesive pressure precisely avoids the solder mark, a structurally vulnerable area, while successfully completing the adhesive application to the tab 7, and simultaneously providing effective protection for the solder mark.

[0072] The avoidance structure ensures that the adhesive pressure of the second adhesive component 3 is not transmitted to the solder area, thus avoiding the risk of solder cracking. Once the solder cracks, it will lead to an increase in the internal resistance of the battery and local heat generation during charging and discharging. In severe cases, it may cause the battery cell to catch fire. Therefore, the avoidance structure is a key protective barrier for battery safety.

[0073] As an alternative, the clearance structure 31 is a groove, and the clearance structure 31 connects the opposite sides of the side of the second adhesive assembly 3 facing the tab 7.

[0074] If the solder mark is a long strip along the length of the tab 7, the clearance structure 31 can be designed as a long groove; if it is a dotted or irregular solder mark, it is designed as a local groove to ensure that the clearance area of ​​the clearance structure 31 completely covers the solder mark range. Usually, the groove 31 is designed to be 0.2mm to 0.5mm larger than the actual size of the solder mark to allow for assembly error redundancy.

[0075] The depth of the clearance structure needs to be slightly greater than the height of the solder mark protrusion. For example, if the solder mark protrusion is 0.2mm, the clearance depth should be designed to be 0.4mm to 0.5mm. This will prevent the second adhesive component 3 from making physical contact with the solder mark, and will not affect the adhesive pressure of the second adhesive component 3 on other areas of the tab 7.

[0076] like Figure 5 As shown, the clearance structure 31 used in this embodiment is a long strip-shaped groove connecting both sides of the second adhesive component 3, which can completely cover the solder area and has a width greater than the maximum width of the solder, to prevent the adhesive from shifting and pressing on the solder. For example, if the solder width is 2mm, the groove 31 is 2.4-3mm wide.

[0077] Because it connects both sides of the second adhesive assembly 3, and its length covers the projected length of the tab 7 in the assembly bonding direction, it completely avoids the tab from one side to the other, so that the adhesive pressure is only applied to the non-soldering area of ​​the tab 7. At the same time, it adapts to the feeding and discharging movement trajectory of the tab 7, and can completely avoid the soldering area without precisely aligning it with the soldering area, thus increasing the adhesive application efficiency.

[0078] The edges of the avoidance structure 31 are rounded or chamfered to avoid stress concentration, prevent the tape 8 from being cut or torn by the edges when applying adhesive, and reduce the risk of wear and tear on the components themselves due to sharp edges.

[0079] Compared to some complex-shaped clearance structures, the elongated groove connecting both sides is easier to implement in machining processes such as milling and wire cutting, reducing processing difficulty and cost, and improving production efficiency. The elongated groove connecting both sides is also easier to measure relative to the size of the tab 7 solder area, requiring only the measurement of the solder width.

[0080] This regular structure makes equipment maintenance and cleaning more convenient, less prone to leaving impurities and waste, and reduces equipment failures or adhesive application quality problems caused by impurity accumulation. The tab 7 is usually continuously conveyed during the adhesive application process, and the long, narrow grooves connecting both sides do not obstruct the conveying path of the tab 7, better adapting to its movement and ensuring a smooth adhesive application process.

[0081] As an alternative, the second adhesive assembly 3 has a contoured end 32 on the side facing the tab 7, and the contoured end 32 is located at the end of the second adhesive assembly 3 near the first adhesive assembly 1.

[0082] like Figure 1 As shown, after the tabs 7 are stacked, the base of the tabs 7 adjacent to the cell 4 will have rounded protrusions and will not be a flat surface. During the adhesive application process, the second adhesive application component 3 will cause the tabs 7 to crack when it is pressed down.

[0083] like Figure 5As shown, at the end of the second adhesive application assembly 3 near the first adhesive application assembly 1, i.e., when the second adhesive application assembly 3 is applying adhesive, a contoured end 32 is designed near the root of the tab 7. This design prevents the tab 7 from cracking due to pressure during adhesive application. The contoured end 32 design allows the adhesive application pressure to be applied more evenly to the surface of the tab 7, especially in the transition area between the root of the tab 7 and the separator of the cell 4. This prevents excessive local pressure from damaging the tab 7, or insufficient pressure from causing the tape 8 to adhere poorly, thus improving the stability of the adhesive application quality.

[0084] The contour of the contoured end 32 matches the root shape of the tab 7. For example, if the tab 7 is a rounded protrusion or bevel, the contoured end 32 is designed as a corresponding curved or beveled surface. When applying adhesive, it can fit the tab 7 more tightly, ensuring that the tape 8 accurately covers every area of ​​the tab 7, improving the accuracy of adhesive application, avoiding gaps in adhesive application, and ensuring the continuity of the tape 8 application of the tab 7.

[0085] As an optional solution, the first adhesive application assembly 1 includes a first adhesive suction head, and the second adhesive application assembly 3 includes a second adhesive suction head, with vacuum channels provided inside the first and second adhesive suction heads.

[0086] The aforementioned vacuum tube is the power source for the adhesive suction head to pick up and apply adhesive. The vacuum tube generates negative pressure to adsorb the adhesive tape 8, allowing the adhesive suction head to accurately grab and transfer the adhesive tape 8 to the surface of the tab 7, ensuring the accuracy of the adhesive application position and replacing the problem of easy damage to the adhesive tape 8 caused by traditional mechanical clamping.

[0087] The first and second suction heads work together to complete the adhesive application of battery cell 4 and tab 7. The vacuum circuit is independently controllable and can accurately adsorb and release adhesive tape 8 separately, realizing segmented adhesive application and covering the large surface of battery cell 4 and the complex adhesive application needs of tab 7. After the first suction head completes the adhesive application of the large surface of battery cell 4, the second suction head continues to complete the adhesive application of tab 7.

[0088] The application of adhesive to tab 7 requires high precision and pressure control to avoid damaging tab 7 and solder marks. Vacuum adsorption method can flexibly contact tape 8 and tab 7. By adjusting the vacuum level, the adsorption of tape 8 can be controlled, avoiding damage to tape 8 or tab 7 by traditional mechanical clamps. It is suitable for the thin, brittle structure of tab 7 with solder marks and protects the integrity of tab 7.

[0089] As an optional solution, the side of the first adhesive suction head facing the battery cell 4 and the side of the second adhesive suction head facing the electrode tab 7 are provided with adsorption holes arranged at intervals, and the vacuum pipeline is connected to the adsorption holes.

[0090] The spaced-out suction holes, rather than a single suction port, allow the vacuum negative pressure to act evenly on the back of the tape 8, balancing the force on the tape 8 and preventing the tape 8 from stretching and deforming due to excessive local negative pressure, or from shifting due to uneven negative pressure, such as the common problem of tape 8 being skewed when applying adhesive to the tab 7.

[0091] Whether it's the first suction head corresponding to the tape 8 of the battery cell 4 or the second suction head corresponding to the tape 8 of the electrode tab 7, the multi-adsorption hole design can cover the effective adsorption area of ​​the tape 8 by changing the number of adsorption holes, ensuring that small-sized tape 8 does not fall off and large-sized tape 8 does not curl up, adapting to different adhesive application scenarios.

[0092] When applying the adhesive, once the suction head approaches the battery cell 4 or the tab 7, the vacuum circuit gradually depressurizes, the negative pressure in the suction holes disappears, and the adhesive tape 8 adheres to the workpiece under its own adhesiveness and the slight pressure of the suction head. The spaced suction holes allow for a smoother depressurization process, preventing premature detachment of the tape 8 due to excessively rapid depressurization at a single point, which could result in air bubbles and weak adhesion.

[0093] The working surface of the first suction head facing the battery cell 4 may have an arc transition, such as the surface of a cylindrical battery cell 4. The working surface of the second suction head facing the tab 7 needs to be adapted to the thin sheet shape of the tab 7. The spaced suction holes on the first and second suction heads can disperse the contact points, allowing the suction heads to fit more closely to the irregular surface of the workpiece and avoid local hard contact that could damage the battery cell 4 or the tab 7.

[0094] It should be noted that this embodiment also provides an optional implementation method, which will be described in detail below.

[0095] The adhesive applicator provided in this embodiment controls the first adhesive applicator 1 and the second adhesive applicator 3 through the drive component 2, achieving a state where the adhesive tape 8 adheres to the battery cell 4 without pulling the electrode tab 7. This effectively solves the technical problem that the adhesive tape 8 is always in a pulled state after the adhesive applicator is applied, causing the electrode tab 7 to easily crack.

[0096] Specifically, after the first adhesive application component 1 descends, it presses down on the battery cell 4, allowing the tape 8 to adhere to the battery cell 4. After the first adhesive application component 1 reaches its position, the second adhesive application component 3 continues to descend in conjunction with the first slider 22 and the first slide rail. The second slider 24 and the second slide rail control the lateral movement of the second adhesive application component 3. Furthermore, through the cooperation of the bearing 62 and the slide groove, the descent and lateral movement of the second adhesive application component 3 are synchronized, ensuring that the tape 8 adheres tightly to the battery cell 4. Figure 2 The existing tape 8 shown cannot adhere tightly to the connection between the base of the tab 7 and the battery cell 4. When the battery cell 4 is transported or moved, the tape 8 tears the tab 7, causing it to crack.

[0097] The first adhesive application component 1 is designed with rounded corners at the base of the tab 7 to prevent cracking at the base of the tab 7. When applying the adhesive tape 8 to the tab 7, the ultrasonic welding solder joint area is avoided to prevent the second adhesive suction head from touching the solder joint area and causing the solder joint to crack.

[0098] In summary, this embodiment improves the cracking of the tab 7 when applying adhesive, effectively solving the technical problem that the tape 8 is always in a tensile state after the adhesive application device applies adhesive, which makes the tab 7 prone to cracking. This achieves the technical effect of improving the adhesive application rate and reducing the manual rework rate.

[0099] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0100] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0101] The above are merely preferred 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 protection scope of this application.

Claims

1. An adhesive applicator, characterized in that, It includes a first adhesive application assembly (1), a driving assembly (2), and a second adhesive application assembly (3); The driving component (2) is used to drive the first adhesive component (1) to move back and forth in a first direction. The first adhesive component (1) is used to apply adhesive to the battery cell (4). The first direction is perpendicular to the surface of the battery cell (4). The driving component (2) is used to drive the second adhesive component (3) to move in the first direction and the second direction, the second direction having an angle with the first direction, and the second adhesive component (3) is used to apply adhesive to the tabs (7) on the battery cell (4).

2. The apparatus according to claim 1, characterized in that, The drive assembly (2) includes a mounting plate (21) movable in the first direction, the mounting plate (21) being provided with a vertical first mounting surface (211) and a second mounting surface (212), the first mounting surface (211) being parallel to the first direction; The first adhesive component (1) is slidably connected to the first mounting surface (211) along the first direction; The second adhesive component (3) is slidably connected to the second mounting surface (212) along the second direction.

3. The apparatus according to claim 2, characterized in that, An elastic element (51) is also provided between the first adhesive component (1) and the mounting plate (21). The first adhesive component (1) has a groove on the side facing the first mounting surface (211); The elastic element (51) is connected to the first mounting surface (211) via a connector (52), and the elastic element (51) is disposed in the groove.

4. The apparatus according to claim 3, characterized in that, The elastic element (51) is a spring. One end of the spring is connected to the end of the groove near the second adhesive assembly (3), and the other end of the spring is connected to the first mounting surface (211) through the connector (52).

5. The apparatus according to claim 1, characterized in that, It also includes guides (61) and bearings (62); The guide (61) is connected to the first adhesive assembly (1), and the guide (61) is provided with a guide groove (63). The bearing (62) is fixedly connected to the second adhesive assembly (3), and the bearing (62) is disposed in the guide groove (63).

6. The apparatus according to claim 1, characterized in that, The second adhesive assembly (3) has an avoidance structure on the side facing the tab (7).

7. The apparatus according to claim 6, characterized in that, The avoidance structure (31) is a groove, and the avoidance structure (31) connects the opposite sides of the side of the second adhesive assembly (3) facing the tab (7).

8. The apparatus according to claim 1, characterized in that, The second adhesive assembly (3) has a contoured end (32) on the side facing the tab (7), and the contoured end (32) is located at the end of the second adhesive assembly (3) near the first adhesive assembly (1).

9. The apparatus according to claim 1, characterized in that, The first adhesive application assembly (1) includes a first adhesive suction head, and the second adhesive application assembly (3) includes a second adhesive suction head. Vacuum channels are provided inside the first adhesive suction head and the second adhesive suction head.

10. The apparatus according to claim 9, characterized in that, The first suction head facing the battery cell (4) and the second suction head facing the electrode (7) are provided with adsorption holes arranged at intervals, and the vacuum pipeline is connected to the adsorption holes.

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