A tab welding stamping and pasting device

Abstract

A tab welding stamping glue device relates to the technical field of battery pack production, including: the base plate is provided with multiple columns of through holes, multiple vacuum glue suction units are fixedly installed in the through holes of the base plate and are used for adsorbing adhesive tape, multiple movable glue sticking units are fixedly installed in the through holes of the base plate and are used for attaching adhesive tape to a glue sticking object, at least one silica gel pad is connected with the lower end of the movable glue sticking unit, wherein the movable glue sticking units are arranged into at least one square matrix on the base plate, and the vacuum glue suction units are arranged on at least two sides of the movable glue sticking unit square matrix. The utility model effectively avoids wrinkles or gaps between the tab due to pulling during the sticking process, improves the flatness, reliability and insulation protection effect of the glue sticking, and reduces the risk of tab damage and battery short circuit.

Description

Technical Field

[0001] This utility model relates to the field of battery pack manufacturing technology, and in particular to a device for applying adhesive to electrode tabs. Background Technology

[0002] In the manufacturing process of aluminum-cased prismatic energy storage batteries, the electrode tab welding and adhesive application is a crucial insulation protection step. This process mainly involves ultrasonically welding the electrode tab to the current collector inside the cell or laser welding the electrode tab to the adapter plate, and then applying insulating tape to the weld location. Its core function is to prevent metal burrs or debris generated during welding from piercing the separator and causing an internal short circuit, while improving the battery's safety and reliability.

[0003] In the prior art, Chinese utility model patent CN222664044U discloses a film-applying device for ultrasonic processes, including two sets of adhesive-absorbing components, an elastic buffer component, and adhesive tape. The tops of both sets of adhesive-absorbing components are coated with adhesive tape, and the bottoms are connected to the elastic buffer component. The adhesive tape has adhesive portions on both sides and a non-adhesive portion in the middle. The non-adhesive portion faces the electrode tabs, and the adhesive portions on both sides face the solder joint and the core, respectively. This utility model uses an intermittent adhesive coating structure, achieving negative pressure adsorption of the adhesive tape through the adhesive-absorbing components. The middle portion in contact with the electrode tabs is non-adhesive, and the adhesive portions on both sides face the solder joint and the core, respectively.

[0004] However, in existing technologies, the adhesive application angle of the pressure head is fixed, making it difficult to adaptively adjust according to the curvature of the electrode surface. This results in incomplete adhesion between the tape and the curved electrode. Furthermore, the planar structure of the pressure head does not perfectly match the actual curved shape of the electrode, easily creating gaps or wrinkles. These problems not only affect the uniformity of the battery cell's appearance but may also lead to decreased electrical performance or even safety hazards due to insufficient insulation protection. Utility Model Content

[0005] The technical problem this invention aims to solve is that the tape does not adhere completely, resulting in gaps or wrinkles, due to the fixed adhesive angle and the mismatch between the flat structure of the pressure head and the curved surface of the tab.

[0006] To achieve the above objectives, according to one aspect of the utility model, a tab soldering adhesive applicator is provided, comprising: a substrate having multiple rows of through holes thereon; multiple vacuum adhesive suction units fixedly installed in the through holes of the substrate for adsorbing adhesive tape; multiple movable adhesive application units fixedly installed in the through holes of the substrate for applying adhesive tape to the object to be adhesived; at least one silicone pad connected to the lower end of each movable adhesive application unit; wherein the movable adhesive application units are arranged in at least one square array on the substrate, and the vacuum adhesive suction units are disposed on at least two sides of the square array of movable adhesive application units.

[0007] As a preferred embodiment of the above technical solution, the number of vacuum adhesive suction units is three columns, one of which is located in the middle of the movable adhesive application unit array, dividing the movable adhesive application unit array into two sub-arrays.

[0008] As a preferred embodiment of the above technical solution, the vacuum adhesive suction unit includes a first hollow base rod, a hollow probe rod retractably disposed within the first hollow base rod, a vacuum suction head disposed at one end of the hollow probe rod away from the first hollow base rod, and a first elastic element disposed within the internal cavity of the first hollow base rod.

[0009] As a preferred embodiment of the above technical solution, the portion of the hollow probe rod located inside the first hollow base rod is provided with a rear abutment flange, and the first elastic element abuts against the rear abutment flange to provide elastic support for the hollow probe rod; a through air channel is provided inside the hollow probe rod, and the through air channel is connected to the chamber at the vacuum suction head.

[0010] As a preferred embodiment of the above technical solution, the portion of the hollow probe rod located inside the first hollow base rod is further provided with a front limiting flange to limit the hollow probe rod from extending excessively beyond the first hollow base rod.

[0011] As a preferred embodiment of the above technical solution, the movable adhesive unit includes a second hollow base rod, a movable probe rod, a probe foot, and a second elastic element; the movable probe rod is telescopically disposed within the second hollow base rod; the probe foot is hinged to the end of the movable probe rod away from the second hollow base rod; the second elastic element is disposed within the internal cavity of the second hollow base rod and abuts against the end of the movable probe rod.

[0012] As a preferred embodiment of the above technical solution, the probe foot is hinged to the probe rod via a hinge member; the upper end of the hinge member is pivotally connected to the probe rod, and the lower end of the hinge member is pivotally connected to the probe foot.

[0013] As a preferred embodiment of the above technical solution, the silicone pad is a soft silicone pad made of transparent silicone, and the silicone pad is provided with easily deformable deformation grooves.

[0014] As a preferred embodiment of the above technical solution, the column orientation of the deformation groove corresponds to the arrangement direction of the single column of the movable adhesive unit, and the deformation groove is located between two adjacent columns of movable adhesive units.

[0015] As a preferred embodiment of the above technical solution, the probe foot has a circular cross-section.

[0016] In summary, this utility model has the following advantages: 1. This utility model, by setting up an array of movable adhesive application units and silicone pads connected to their lower ends, endows the adhesive application device with good adaptability and buffering ability, enabling it to better conform to the irregular curved surface of the electrode tab; the vacuum adhesive suction units are distributed on both sides of the array, which can stably adsorb and position the adhesive tape; this structure works together to effectively avoid wrinkles or gaps between the adhesive tape and the electrode tab caused by pulling during the application process, improve the flatness, reliability and insulation protection of the adhesive application, and reduce the risk of electrode tab damage and battery short circuit; 2. Furthermore, the telescopic structure design of the hollow probe rod inside the vacuum adhesive suction unit not only provides excellent elastic cushioning during the adhesive suction process, avoiding rigid impact damage to the tape or electrode tabs, but its mechanical limiting structure also effectively prevents the hollow probe rod from overextending. This design ensures the stability and sealing of the vacuum passage during dynamic adhesive application, avoiding air leakage or component damage that may result from accidental overextension, thereby improving the reliability and service life of the device. 3. Furthermore, the hinged design of the probe pins in the active adhesive unit, combined with the deformation grooves on the silicone pad, gives the adhesive applicator head multi-degree-of-freedom swinging and local deformation capabilities. This design allows the probe pins to not only elastically deform along with the silicone pad as a whole when contacting the tab surface, but also adaptively adjust their angle according to the curvature of the tab surface. The benefit is that it better adapts to the irregular curves and subtle undulations of the tab surface, ensuring that the tape conforms to the shape during application, effectively reducing air bubbles and gaps caused by insufficient contact, and significantly improving the adhesion integrity and insulation sealing reliability between the tape and the tab surface. Further or other beneficial effects will be discussed in the embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the electrode tab welding and adhesive application device of this utility model; Figure 2 This is a schematic diagram of the hollow adhesive absorption unit structure of this utility model; Figure 3 This is a full sectional view of the hollow adhesive absorption unit of this utility model; Figure 4 This is a schematic diagram of the movable adhesive unit structure of this utility model; Figure 5 This is a full sectional view of the movable adhesive unit of this utility model; Figure 6 This is a schematic diagram of the silicone pad structure of this utility model; Figure 7 This is a schematic diagram of the adhesive application alignment for the electrode tab welding and adhesive application device of this utility model; Among them, 100-substrate, 200-vacuum adhesive suction unit, 210-first hollow base rod, 220-hollow probe rod, 221-through air channel, 222-rear abutment flange, 223-front limiting flange, 230-vacuum suction head, 240-first elastic element, 300-movable adhesive application unit, 310-second hollow base rod, 320-movable probe rod, 330-probe foot, 340-second elastic element, 350-hinge, 400-silicone pad, 410-deformation groove, a-core, b-tab. Detailed Implementation

[0018] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0019] The present invention will be further explained below with reference to the embodiments: Example:

[0020] A device for applying adhesive to electrode tabs, as described in the following figure. Figure 1 The system includes a substrate 100 serving as the mounting base. The substrate 100 has multiple rows of through holes for fixing and mounting the vacuum adhesive suction unit 200 and the movable adhesive application unit 300. This embodiment includes multiple vacuum adhesive suction units 200 for adsorbing adhesive tape and multiple movable adhesive application units 300 for attaching adhesive tape to the object to be adhesived; the movable adhesive application units 300 are arranged in at least one array on the substrate 100, and the vacuum adhesive suction units 200 are at least disposed on both sides of the array of movable adhesive application units 300.

[0021] As a preferred embodiment of this application, the number of vacuum adhesive adsorption units 200 can be three columns, one of which is located in the middle of the array of movable adhesive adsorption units 300, dividing it into two sub-arrays, thereby achieving multi-point and stable adsorption of the adhesive tape.

[0022] The vacuum adhesive suction unit 200 is responsible for adsorbing the adhesive tape. (Refer to...) Figure 2 and Figure 3The specific structure includes a first hollow base rod 210, a hollow probe rod 220 retractably disposed within the first hollow base rod 210, a vacuum suction head 230 disposed at the end of the hollow probe rod 220 away from the first hollow base rod 210, and a first elastic member 240 disposed within the internal cavity of the first hollow base rod 210. The portion of the hollow probe rod 220 located inside the first hollow base rod 210 is provided with a rear abutment flange 222, and the first elastic member 240 abuts against the rear abutment flange 222, providing elastic support for the hollow probe rod 220. This structure enables the vacuum adhesive suction unit 200 to have a buffering capacity when contacting the surface of the tape or tab b, avoiding rigid impact damage to the tape or tab b. The hollow probe rod 220 has a through-flow air channel 221 inside, which is connected to the chamber at the vacuum suction head 230 to form a continuous vacuum path. This design ensures that negative pressure energy is efficiently and stably transmitted to the vacuum suction head 230, achieving reliable adsorption. The portion of the hollow probe rod 220 located inside the first hollow base rod 210 is also provided with a front limiting flange 223 to limit the hollow probe rod 220 from over-extending the first hollow base rod 210. This structure provides mechanical limiting and protection, preventing the hollow probe rod 220 from over-extending in case of accidental damage to the internal structure or causing vacuum seal failure, thereby improving the reliability and service life of the device.

[0023] The active adhesive application unit 300 is responsible for performing the adhesive application action. Multiple such units are arranged in a square array of at least three columns on the substrate 100. (See reference...) Figure 4 and Figure 5 Each movable adhesive application unit 300 includes a second hollow base rod 310, a movable probe rod 320 retractably disposed within the second hollow base rod 310, a probe foot 330 hinged to the distal end of the movable probe rod 320, and a second elastic member 340. The second elastic member 340 is disposed within the internal cavity of the second hollow base rod 310 and abuts against the end of the movable probe rod 320, also providing buffering and reset functions. The probe foot 330 is hinged to the probe rod via a hinge member 350; the upper end of the hinge member 350 is pivotally connected to the probe rod, and the lower end is pivotally connected to the probe foot 330. This two-degree-of-freedom oscillating pressure head structure design allows the probe foot 330 to achieve multi-angle deflection to adapt to the curvature changes of the tab surface. The probe foot 330 has a circular cross-section, which helps reduce contact stress and promotes the smooth spreading of the adhesive tape.

[0024] In this embodiment, both the first elastic element 240 and the second elastic element 340 are made of softer materials, such as springs made of carbon spring steel or silicon manganese spring steel.

[0025] In the preferred embodiment of this application, three rows of vacuum adhesive suction units 200 and two sub-arrays of movable adhesive application units 300 are used. The two sub-arrays are respectively arranged between the three rows of vacuum adhesive suction units 200. The two sub-arrays are a first sub-array composed of four rows of movable adhesive application units 300 and a second sub-array composed of three rows of movable adhesive application units 300 on the right. The number of vacuum adhesive suction units 200 and movable adhesive application units 300 in the column direction is the same. Figure 7 In this preferred embodiment, there are eight sub-arrays. The first sub-array is used to coat the junction area between the core a and the tab b on the aluminum-cased square energy storage battery with adhesive, and the second sub-array is used to coat the curved surface of the tab b with adhesive.

[0026] At least one silicone pad 400 is connected to the lower end of the movable adhesive unit 300. (Refer to...) Figure 6 The silicone pad 400 is preferably a soft silicone pad made of transparent silicone, on which deformable grooves 410 are provided. The column orientation of the deformation grooves 410 corresponds to the single-row arrangement direction of the movable adhesive units 300. The deformation grooves 410 are located between two adjacent rows of movable adhesive units 300. The presence of these deformation grooves 410 significantly enhances the overall flexibility and local deformation capability of the silicone pad 400, enabling it to better conform to uneven or curved tab surfaces.

[0027] In practical implementation, the device is installed at the corresponding workstation on the battery production line. During material loading, the device moves to the adhesive preparation position, moves downward to contact the adhesive tape, the vacuum passage is connected to the negative pressure source, and the cutter cuts the tape so that the vacuum suction head 230 can pick up the cut insulating tape. Subsequently, the entire device or adhesive application unit moves above the tab solder mark to be adhesiveed. The movable adhesive application unit 300 moves downward under the action of the drive mechanism (not shown in the figure, but may be a cylinder, motor, etc.). Before or at the beginning of contact with the surface of the tab b, the probe foot 330 can adaptively adjust its angle according to the actual contour of the tab b by means of its hinge structure and elastic support. The silicone pad 400 deforms under pressure, and its deformation groove 410 allows the pad to better wrap and conform to the curved surface of the tab b. Under the pressure applied by the movable adhesive application unit 300 (through the silicone pad 400) and the possible accompanying slight rubbing, the tape is pressed flat onto the solder mark and its surrounding area, ensuring that the tape is in close contact with the metal surface without bubbles or wrinkles. The vacuum adhesive unit 200 releases the adhesive tape at the appropriate time. This design is particularly suitable for situations where the surface of the tab b is not flat or has complex curvature. It can effectively solve problems such as incomplete bonding, gaps or wrinkles caused by traditional fixed-angle pressure heads, and significantly improve the adhesive bonding quality and the safety of the battery cell.

[0028] The electrode tab welding and adhesive application device provided in this embodiment is based on the combination of an array-arranged vacuum adhesive suction unit 200 and a multi-degree-of-freedom movable adhesive application unit, supplemented by a specially designed silicone pad 400, to achieve high-quality, adaptive adhesive application for welding and printing electrode tabs of aluminum-cased square energy storage batteries, especially curved electrode tabs b.

[0029] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0030] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A device for applying adhesive to electrode tabs, characterized in that, include: A substrate (100) having multiple rows of through holes thereon; Multiple vacuum adhesive adsorption units (200) are fixedly installed in the through holes of the substrate (100) for adsorbing adhesive tape; Multiple movable adhesive application units (300) are fixedly installed in the through holes of the substrate (100) for applying adhesive tape to the object to be adhesived; At least one silicone pad (400) is connected to the lower end of the movable adhesive unit (300); The movable adhesive application units (300) are arranged in at least one array on the substrate (100), and the vacuum adhesive suction units (200) are disposed on at least two sides of the array of movable adhesive application units (300).

2. The electrode tab welding and adhesive application device according to claim 1, characterized in that, The number of vacuum adhesive suction units (200) is three columns, one of which is located in the middle of the array of movable adhesive application units (300), dividing the array of movable adhesive application units (300) into two sub-arrays.

3. The electrode tab soldering and adhesive application device according to claim 1, characterized in that, The vacuum adhesive suction unit (200) includes a first hollow base rod (210), a hollow probe rod (220) retractably disposed within the first hollow base rod (210), a vacuum suction head (230) disposed at one end of the hollow probe rod (220) away from the first hollow base rod (210), and a first elastic element (240) disposed within the internal cavity of the first hollow base rod (210).

4. The electrode tab soldering and adhesive application device according to claim 3, characterized in that, The hollow probe rod (220) located inside the first hollow base rod (210) is provided with a rear abutment flange (222), and the first elastic member (240) abuts against the rear abutment flange (222) to provide elastic support for the hollow probe rod (220); the hollow probe rod (220) is provided with a through air channel (221), which is connected to the chamber at the vacuum suction head (230).

5. The electrode tab soldering and adhesive application device according to claim 4, characterized in that, The portion of the hollow probe rod (220) located inside the first hollow base rod (210) is also provided with a front limiting flange (223) to limit the hollow probe rod (220) from extending excessively beyond the first hollow base rod (210).

6. The electrode tab soldering and adhesive application device according to claim 1, characterized in that, The movable adhesive unit (300) includes a second hollow base rod (310), a movable probe rod (320), a probe foot (330), and a second elastic element (340); the movable probe rod (320) is telescopically disposed within the second hollow base rod (310); the probe foot (330) is hinged to the end of the movable probe rod (320) away from the second hollow base rod (310); the second elastic element (340) is disposed within the internal cavity of the second hollow base rod (310) and abuts against the end of the movable probe rod (320).

7. The electrode tab soldering and adhesive application device according to claim 6, characterized in that, The probe foot (330) is hinged to the probe rod via a hinge (350); the upper end of the hinge (350) is pivotally connected to the probe rod, and the lower end of the hinge (350) is pivotally connected to the probe foot (330).

8. The electrode tab soldering and adhesive application device according to claim 1, characterized in that, The silicone pad (400) is a soft silicone pad made of transparent silicone, and the silicone pad (400) is provided with a deformable groove (410).

9. The electrode tab soldering and adhesive application device according to claim 8, characterized in that, The column orientation of the deformation groove (410) corresponds to the arrangement direction of the single column of the movable adhesive unit (300), and the deformation groove (410) is located between two adjacent columns of movable adhesive units (300).

10. The electrode tab soldering and adhesive application device according to claim 6, characterized in that, The probe foot (330) has a circular cross-section.

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