Battery cell top cover film pasting device

Abstract

The application provides a kind of electric core top cover film sticking device, it relates to battery processing technical field, including the conveying mechanism of conveying top cover and the film sticking mechanism of top cover film sticking, conveying mechanism includes two mutually parallel support strips, the distance adjusting assembly of adjusting the distance between two support strips, the conveying assembly of being arranged between two support strips, and the positioning assembly of being positioned on conveying assembly and the position of top cover, top cover length direction is placed on two support strips along vertical or parallel support strip length direction, when top cover film sticking operation, conveying assembly controls top cover to move gradually along length direction on two support strips, top cover moves to positioning assembly, and film sticking mechanism is positioned after top cover film sticking to the top cover of positioning assembly.This application is convenient for flexible adaptation to multiple size electric core top cover, simultaneously realizes the accurate conveying and positioning of top cover, effectively improves the film sticking efficiency and film sticking precision of electric core top cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery processing, in particular to a kind of top cover film sticking device of battery cell. BACKGROUND

[0002] With the rapid development of new energy vehicles, energy storage equipment and other industries, lithium ion battery cell as a key energy storage component, its market demand presents explosive growth. In the large-scale production process of battery cell, top cover film sticking is a crucial process. Battery cell top cover film sticking can not only play the role of insulation and protection, prevent short circuit, damage and other problems caused by external factors during use, but also improve the overall sealing and safety of battery cell to a certain extent, which has significant meaning for ensuring the performance stability and service life of battery cell.

[0003] The existing battery cell film sticking device has the following problems:

[0004] 1. The common battery cell top cover film sticking device on the market often has a fixed structure design, which can only adapt to battery cell top covers of specific size specifications. When production enterprises need to produce battery cells of different sizes, they need to purchase multiple sets of film sticking devices of different specifications, which not only increases the equipment procurement cost of enterprises, but also occupies a large amount of production space, bringing many inconveniences to the production management of enterprises.

[0005] 2. Some film sticking devices lack effective and precise control mechanisms during the conveying and positioning of battery cell top covers. During the conveying process, the top cover may shift and shake, resulting in inaccurate film sticking position, quality problems such as film sticking skew and wrinkles, and affecting the appearance and performance of the battery cell. Moreover, inaccurate positioning also increases the subsequent rework rate, reduces production efficiency, and increases production cost.

[0006] 3. Some traditional film sticking devices have low automation level and require a large amount of manual operation. The placement of top cover and the adjustment of position need to be completed by manual operation, which not only increases the labor intensity, but also easily causes operation errors due to human factors, further affecting the film sticking quality and production efficiency. At the same time, the speed of manual operation is relatively slow, which is difficult to meet the production demand of large scale and high efficiency. SUMMARY

[0007] In view of the above problems, the present application provides a kind of top cover film sticking device of battery cell.

[0008] In order to achieve the above object, the application provides the following technical scheme: a battery cell top cover film pasting device, comprising a conveying mechanism for conveying the top cover and a film pasting mechanism for pasting film on the top cover, the conveying mechanism comprising two mutually parallel support bars, a distance adjusting assembly for adjusting the distance between the two support bars, a conveying assembly arranged between the two support bars, and a positioning assembly arranged on the conveying assembly and used for positioning the position of the top cover, the length direction of the top cover being placed on the two support bars along the vertical or parallel direction of the length direction of the support bars;

[0009] Before pasting film on the battery cell top cover, the distance adjusting assembly adjusts the distance between the two support bars to match the conveyed top cover;

[0010] When the top cover is pasted with film, the top cover is placed on one end of the top side of the two support bars one by one, the conveying assembly controls the top cover to move along the length direction on the two support bars at a step distance, and when the top cover moves to the positioning assembly, the film pasting mechanism pastes film on the top cover positioned by the positioning assembly;

[0011] The distance adjusting assembly comprises two conveying plates arranged symmetrically on the opposite sides of the two support bars, a plurality of vertical rods arranged equidistantly between the two support bars along the length direction of the support bars, a support block arranged vertically on the top of the vertical rod, and a distance adjusting piece for controlling the two conveying plates to move closer to or farther away from each other, the conveying assembly is arranged on the opposite surfaces of the two conveying plates and controls the plurality of vertical rods to rotate circumferentially, each group of two vertical rods corresponds to the different support bars, and the plurality of vertical rods are connected to the conveying assembly;

[0012] Preferably, the positioning assembly comprises a positioning block arranged between the support blocks on the top of each group of two vertical rods, two elongated rods fixedly arranged on one end of the positioning block close to the support block, two elongated arms movably sleeved on the different elongated rods on one end close to each other, and a positioning piece arranged on the positioning block and used for controlling the center positioning of the top cover, two positioning telescopic rods arranged in the elongated arms and connected to the inner wall of the elongated arm and the elongated rod at both ends, and a positioning spring movably sleeved on the telescopic rod.

[0013] Preferably, rotation grooves are arranged at the two end positions of the opposite surfaces of the two conveying plates, the conveying assembly comprises a rotating ring rotatably arranged in the rotation groove, two lifting bars arranged below the two support bars in parallel, and two rotating columns rotatably arranged on the two end positions of the lifting bars, the two rotating columns on the two ends of the lifting bar are arranged on the different end faces of the rotating ring on the conveying plate; the rotating ring is arranged below the support bar; and a motor drives the rotating ring to rotate in the rotation groove.

[0014] Preferably, the two conveying plates are provided with rotating grooves at both ends of the opposite faces, the rotating groove opening is in the shape of a rectangular frame structure, the conveying assembly comprises rotating blocks provided in the rotating grooves through driving members, lifting bars provided below the two support bars and parallel to each other, rotating columns provided at the ends of the lifting bars and rotatingly provided in the rotating grooves, and the two rotating columns at the ends of the lifting bars are respectively connected to different rotating blocks on the conveying plates; the rotating blocks are below the support bars, and the driving members control the rotating blocks to move in the rotating grooves.

[0015] Preferably, the driving member comprises a connecting rod provided between and connected to the two lifting bars, a second moving cylinder provided vertically and having a top output end connected to the connecting rod, a third sliding block provided at the bottom of the second moving cylinder, a third sliding rail provided at the bottom of the third sliding block and along the length direction of the support bar, and a first moving cylinder driving the third sliding block to slide on the third sliding rail.

[0016] Preferably, the distance adjusting member comprises two second sliding rails parallel to each other and provided on the bottom side of the conveying plate along the vertical direction of the length of the conveying plate, two second sliding blocks provided in pairs on each second sliding rail, a lifting structure provided vertically at the middle position of the bottom side of the second sliding rail, and two linkage rods rotatably connected at one end to the output end of the lifting structure, and the other ends of the two linkage rods are respectively rotatably connected to different second sliding blocks on the second sliding rail, and the two second sliding blocks provided on the second sliding rail are respectively connected to different conveying plates.

[0017] Preferably, the lifting structure comprises an adjusting rod provided vertically and having a top provided at the middle position of the bottom side of the second sliding rail, an adjusting screw provided in the adjusting groove of the rod body of the adjusting rod, an adjusting block provided on the rod body of the adjusting screw through thread connection, and a motor driving the adjusting screw to rotate, and the end of the adjusting block is rotatably connected to the adjacent end of the two linkage rods.

[0018] Preferably, the positioning member comprises two first rotating rods rotatably provided at the center position of the bottom of the positioning block, two control rods provided between the two vertical rods of each group and symmetrically about the positioning block, a second rotating rod provided vertically and rotatably at the top side of the end of the first rotating rod, sliding blocks fixedly provided at the top side of the two ends of the control rod, and a control structure controlling the two control rods to approach or move away from each other, and the rod body of the first rotating rod is provided with a sliding groove at both ends, and the sliding block is slidingly provided in the sliding groove.

[0019] Preferably, the control structure comprises two moving blocks symmetrically arranged on the two side surfaces of the positioning block, two moving rods arranged vertically and sleeved on the moving blocks through the moving grooves formed on the rod bodies, a clamping telescopic rod arranged between the two control rods and connected with the two control rods respectively, and a clamping spring sleeved on the rod body of the clamping telescopic rod, wherein when the clamping spring is in a normal elongation state, the second rotating rod is located away from the positioning block; the bottom end of the moving rod is arranged in the inclined groove formed on the top side of the control rod, and the bottom wall of the control rod bottom and the inclined groove are both inclined surfaces, which gradually move away from the positioning block from top to bottom.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. The cell top cover film sticking device of the present application can flexibly adjust the distance between the two support bars by setting the distance adjusting assembly. When facing cell top covers of different size specifications, only the distance adjusting assembly needs to be operated to match the distance between the two support bars with the size of the top cover to be stuck, so that the same set of device can be used for film sticking operation of top covers of various sizes. This design greatly improves the versatility of the device, reduces the cost investment of enterprises for purchasing multiple sets of equipment due to the production of different size cells, saves production space, and optimizes production layout. Since the device has strong versatility, when the cell product is upgraded or new size specifications of cells are produced, the entire film sticking device does not need to be replaced, and only the distance adjusting assembly needs to be simply adjusted for continued use. This not only reduces the equipment update cost of enterprises, but also shortens the equipment adjustment period.

[0022] 2. The unique design of the conveying assembly can control the top cover to move step by step along the length direction on the two support bars at the same distance. This precise conveying method can effectively avoid problems such as deviation and shaking of the top cover during conveying, ensuring that the top cover can accurately and stably reach the positioning assembly position, laying a foundation for subsequent precise film sticking. The positioning assembly accurately adjusts the top cover to the center position, ensures the accuracy of the film sticking position, effectively reduces the occurrence of quality problems such as film sticking skew and wrinkles, and improves the appearance quality and performance stability of the cell.

[0023] 3. The film sticking device of the present application realizes automatic operation from top cover conveying, positioning to film sticking, greatly reducing the involvement of manual operation. During the top cover film sticking process, only the top cover needs to be placed one by one on one end of the top side of the two support bars, and the device can automatically complete the subsequent conveying, positioning and film sticking operations, reducing the labor intensity and improving the production efficiency. Automatic operation makes the film sticking process more continuous and efficient, reduces the time interval and error caused by manual operation, and can meet the production demand of large scale and high efficiency. At the same time, the precise control of automation also improves the film sticking quality, reduces the defective rate, and further improves the production benefit. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and are meant to explain the present application, but are not intended to limit the present application, in the drawings:

[0025] Figure 1 The simple structure schematic diagram of the battery cell top cover film pasting device.

[0026] Figure 2 The side structure schematic diagram of the battery cell top cover film pasting device.

[0027] Figure 3 The conveying mechanism structure schematic diagram of the present application.

[0028] Figure 4 The conveying mechanism working state structure schematic diagram of the present application.

[0029] Figure 5 The second conveying assembly structure schematic diagram of the present application.

[0030] Figure 6 The positioning assembly structure schematic diagram of the present application.

[0031] Figure 7 The positioning member structure schematic diagram of the present application.

[0032] Figure 8 The positioning member unfolded structure schematic diagram of the present application.

[0033] Figure 9 The positioning member unfolded bottom view structure schematic diagram of the present application.

[0034] Figure 10 The moving rod and control rod structure schematic diagram of the present application.

[0035] Figure 11 The film pasting assembly structure schematic diagram of the present application.

[0036] In the figure: 1, mounting plate; 2, rotating cylinder; 3, recovery cylinder; 4, limiting plate; 5, control cylinder; 6, first sliding rail; 7, first sliding block; 8, conveying plate; 9, first lifting cylinder; 10, second lifting cylinder; 11, adsorption head; 12, support frame; 13, support strip; 14, lifting strip; 15, vertical rod; 16, support block; 17, top cover; 18, protective film; 19, rotating groove; 20, rotating ring; 21, limiting telescopic rod; 22, second sliding rail; 23, second sliding block; 24, adjusting rod; 25, adjusting groove; 26, adjusting screw; 27, adjusting block; 28, linkage rod; 29, first moving cylinder; 30, second moving cylinder; 31, third sliding rail; 32, third sliding block; 33, positioning block; 34, extension rod; 35, extension arm; 36, positioning telescopic rod; 37, positioning spring; 38, control rod; 39, first rotating rod; 40, sliding groove; 41, sliding block; 42, second rotating rod; 43, clamping telescopic rod; 44, clamping spring; 45, inclined groove; 46, moving rod. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the following further describes the present application in combination with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present application, and not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0038] At present, with the vigorous development of the electric core industry, as the core energy storage component of many electronic devices and new energy systems, the production scale of lithium ion electric core is increasing day by day, and the importance of the key process of electric core top cover film pasting is also increasing. Top cover film pasting not only can guarantee the insulation performance of the electric core and prevent short circuit and other safety hazards, but also can play a protective role, improve the reliability and service life of the electric core as a whole.

[0039] However, when examining the current electric core top cover film pasting device market, a series of technical problems seriously restrict the improvement of production efficiency and product quality. From the perspective of universality, the structure design of the existing device is mostly rigid, and the size and parameters of its key components such as support structure and conveying path are tailored for electric core top covers of specific specifications. This makes it difficult for existing film pasting devices to meet the needs when production enterprises need to produce electric cores of different sizes due to changes in market demand or product upgrades. They can only purchase new equipment that is suitable for new size top covers. This not only brings heavy equipment procurement cost burden to enterprises, but also makes the production space cramped and greatly limits the optimization of production layout due to the occupation of a large number of different specification equipment.

[0040] In terms of film pasting accuracy, the existing device also performs poorly. During the top cover conveying process, due to the design defects of the conveying assembly, there is a lack of effective stabilizing and guiding mechanism, and the top cover is prone to deviation and shaking. In the positioning process, the positioning assembly lacks accuracy and cannot accurately fix the top cover at the predetermined position, resulting in position deviation during film pasting, frequent problems such as film pasting skew and wrinkles. These problems not only affect the appearance quality of the battery cell, but also may have a potential impact on its performance, increasing the product's defective rate and causing economic losses to the enterprise.

[0041] In addition, the low degree of automation is also a major problem of the existing film pasting device. Many devices still rely on manual operation in key operation links such as top cover placement and position adjustment, which not only makes the production process labor-intensive and inefficient, but also the uncertainty of manual operation can easily lead to operation errors, further affecting the film pasting quality and production consistency. In today's industry background of pursuing efficient, accurate and large-scale production, the automation shortcomings of the existing device are increasingly prominent, and it is difficult to meet the needs of rapid development of enterprises.

[0042] To effectively overcome the above technical problems, the present technical solution provides a new battery top cover film pasting device. The device introduces a distance-adjustable distance adjustment assembly, which can quickly and accurately adjust the distance between the two support bars according to battery top covers of different sizes, realize the adaptation of the same device to various specifications of top covers, greatly improve the versatility of the equipment, and save the equipment procurement cost and production space for enterprises. At the same time, by optimizing the design of the conveying assembly and the positioning assembly, the conveying assembly adopts a unique step-by-step equal-distance moving method to ensure that the top cover moves stably and accurately during the conveying process; the positioning assembly uses precise mechanical structure and control mechanism to quickly and accurately center the top cover, effectively improving the film pasting accuracy and reducing the film pasting quality problems. In addition, the device also realizes high automation operation, from automatic conveying, accurate positioning of the top cover to automatic film pasting, the whole process does not need too much human intervention, greatly reducing the labor intensity, improving the production efficiency, ensuring the consistency and stability of production, and providing strong technical support for battery production enterprises to improve market competitiveness. The following will be described in detail in combination with specific embodiments.

[0043] In order to facilitate understanding of the improvement basis of the present application, the following will be described in combination with Figure 1 , Figure 2 and Figure 10 . The film pasting mechanism of the present application is composed of a protective film supply assembly provided on a mounting plate 1 and a film pasting assembly for controlling the pasting of the protective film 18 on the top cover 17.

[0044] The protective film supply assembly includes a rotating cylinder 2 for placing a carrier tape cylinder and a recovery cylinder 3 arranged below the rotating cylinder 2. The carrier tape cylinder is wound with a carrier tape having the protective film 18, and the other end of the carrier tape is connected to the recovery cylinder 3 after passing through the film pasting assembly. During film pasting, the rotating cylinder 2 rotates, and the carrier tape moves between the rotating cylinder 2 and the recovery cylinder 3 to continuously supply the film pasting.

[0045] In the film pasting assembly, the limiting plate 4 is arranged horizontally on the mounting plate 1 and located above the conveying assembly on one side. The carrier tape passes through and is laid on the top side of the limiting plate 4, and the protective film 18 is placed on the upper surface of the carrier tape. In the film pasting component, the first sliding rail 6 is fixed horizontally on the mounting plate 1, the first sliding block 7 is slidably sleeved on the first sliding rail 6, the control cylinder 5 is arranged horizontally and the output end is connected to the first sliding block 7, and the first sliding block 7 is further connected to the limiting plate 4. The first lifting cylinder 9 is arranged on the mounting plate 1 and vertically arranged above the top cover 17. The second lifting cylinder 10 is vertically arranged and the side surface is connected to the output end of the first lifting cylinder 9. The suction head 11 is arranged on the output end of the second lifting cylinder 10 and connected to the vacuum pump for adsorbing the protective film 18. The suction head 11 is located directly above the top cover 17.

[0046] The operation process of the film pasting mechanism is as follows: the conveying assembly conveys the top cover 17 to the film pasting station. The first lifting cylinder 9 is started to drive the second lifting cylinder 10 and the suction head 11 to move downward. The suction head 11 contacts and adsorbs the protective film 18 of the carrier tape on the limiting plate 4. Then, the control cylinder 5 works to push the first sliding block 7 to move along the first sliding rail 6, drive the limiting plate 4 to move away from the conveying assembly (for avoiding the suction head 11, facilitating the subsequent movement of the suction head 11 and the protective film 18 to the top cover 17 for film pasting operation), and then the first lifting cylinder 9 and the second lifting cylinder 10 act synchronously to drive the suction head 11 and the protective film 18 to move downward to paste the protective film 18 on the top cover 17, completing the film pasting.

[0047] Embodiment 1: Referring to Figures 1-11 The device for pasting the protective film on the top cover of the battery cell includes a conveying mechanism for conveying the top cover 17 and a film pasting mechanism for pasting the protective film on the top cover 17. The conveying mechanism includes two support bars 13 arranged in parallel with each other, a distance adjusting assembly for adjusting the distance between the two support bars 13, a conveying assembly arranged between the two support bars 13, and a positioning assembly arranged on the conveying assembly and used for positioning the top cover 17. The length direction of the top cover 17 is arranged on the two support bars in a vertical or parallel manner with respect to the length direction of the support bars 13.

[0048] Before pasting the protective film on the top cover 17 of the battery cell, the distance adjusting assembly adjusts the distance between the two support bars 13 to match the conveyed top cover 17, facilitating the pasting operation of the top cover 17 of different batches and models, and improving the versatility of the device.

[0049] When the top cover 17 is pasted, the top cover 17 is placed on one end of the top side of the two support strips 13 one by one, and the conveying assembly controls the top cover 17 to move on the two support strips 13 along the length direction at a step distance, and when the top cover 17 moves to the positioning assembly, the film pasting mechanism pastes the top cover 17 positioned by the positioning assembly.

[0050] Before the top cover 17 is pasted, the distance adjusting assembly works, and according to the size specification of the top cover 17 to be conveyed, the distance between the two parallel support strips 13 is accurately adjusted to ensure that the distance between the two is matched with the top cover 17, and the preparation for pasting the top cover 17 of different batches is ready, which can easily adapt to the top cover 17 of different batches, greatly improving the versatility of the device and reducing the cost of purchasing multiple sets of equipment due to the production of different specifications of top cover. When the film pasting operation starts, the top cover 17 is placed on one end of the top side of the two support strips 13 one by one, and then the conveying assembly starts to control the top cover 17 to move on the two support strips 13 along the length direction at a step distance, ensuring that the step distance of each top cover 17 is consistent and stable, laying a foundation for subsequent accurate film pasting. When the top cover 17 moves to the position of the positioning assembly, the positioning assembly quickly and accurately positions the position of the top cover 17, ensuring the accuracy of the top cover 17 pasting, effectively improving the quality of the film pasting, reducing the rate of defective products, and thus improving the overall production efficiency and product quality. At this time, the film pasting mechanism immediately pastes the top cover 17 positioned by the positioning assembly.

[0051] The distance adjusting assembly adjusts the distance between the two support strips 13. The embodiment provides the following solutions:

[0052] As shown in Figure 3 and Figure 4 , the distance adjusting assembly includes two conveying plates 8 arranged symmetrically on the side surfaces of the two support strips 13 opposite to each other, a plurality of vertical rods 15 arranged at equal intervals between the two support strips 13 along the length direction of the support strips 13, a support block 16 arranged transversely and perpendicularly on the top of the vertical rod 15, and a distance adjusting piece controlling the two conveying plates 8 to move closer to or farther away from each other, and the conveying assembly is arranged on the opposite surfaces of the two conveying plates 8 and controls the plurality of vertical rods 15 to rotate around the circumference; each group of two vertical rods 15 corresponds to the different support strips 13 close to each other, and the plurality of vertical rods 15 are connected to the conveying assembly.

[0053] The distance adjusting member starts to work when adjusting the distance between the two support bars 13 for the top cover 17 of different batches of models. According to the preset size parameters of the top cover 17, the distance adjusting member generates corresponding power, and the conveying plates 8 are moved closer to or away from each other under the action of the distance adjusting member, thereby realizing the preliminary distance adjustment trend. At this time, the top cover 17 is placed on the two support bars 13. After the conveying plates 8 are moved, the conveying assembly controls the plurality of vertical rods 15 to rotate around the circumference. During the rotation of the vertical rods 15, the support blocks 16 located on the top of the vertical rods 15 rotate around the circumference along the parallel surface between the two support bars 13, that is, the support blocks 16 are lifted from the two support bars 13 and rotated above the two support bars 13 in the rotation direction, and during the rotation below the two support bars 13, the top cover 17 located on the support blocks 16 is supported by the two support bars 13, and at this time, the top cover 17 is placed on the two support bars 13, thereby realizing the control of the distance of the movement of the top cover 17 around the circumference along the length of the support bar 13, and realizing the step-by-step same-distance movement of the plurality of top covers 17. When the top cover 17 moves to the positioning assembly, the film pasting mechanism pastes the film on the top cover 17 positioned by the positioning assembly.

[0054] The design of the plurality of vertical rods 15 arranged at equal intervals in pairs and the rotation of the vertical rods 15 around the circumference controlled by the conveying assembly enables the top cover 17 to move synchronously and stably on the two support bars 13, ensures the precision and uniformity of conveying the top cover 17, avoids problems such as unstable conveying of the top cover 17 or deviation of the film pasting position, and ensures that the top cover 17 can maintain a stable posture and uniform step distance during the conveying process, which is conducive to the accurate positioning of the subsequent positioning assembly and the high-quality film pasting of the film pasting mechanism, thereby improving the stability of the entire film pasting production process and the product quality. Under the condition of adjusting the distance between the two conveying plates 8, the precision of conveying the top cover 17 is improved.

[0055] It can be understood that the distance between the two support bars 13 can be adjusted in various ways. The embodiment provides the following solutions:

[0056] As shown in Figure 3 and Figure 4 , the distance adjusting member includes two second sliding rails 22 (the second sliding rails 22 are installed on the support frame 12) parallel to each other and arranged on the bottom side of the conveying plate 8 along the vertical direction of the length of the conveying plate 8, two second sliding blocks 23 arranged in pairs and sleeved on each second sliding rail 22, a lifting structure arranged vertically on the middle position of the bottom side of the second sliding rail 22, and two linkage rods 28 rotatably connected to the output end of the lifting structure at one end close to each other, and the other ends of the two linkage rods 28 are rotatably connected to different second sliding blocks 23 on the second sliding rail 22, and the two second sliding blocks 23 arranged on the second sliding rail 22 are connected to different conveying plates 8.

[0057] The embodiment first ensures stable movement adjustment between the two conveying plates 8 by sliding the two second sliding blocks 23 on the second sliding rail 22, and lays a foundation for subsequent adjustment of the distance between the support bars 13 according to the size of the different top covers 17. The two ends of the two linkage rods 28 are driven to move up and down in the vertical direction by the lifting assembly, and the two second sliding blocks 23 are driven to stably slide away from or close to each other on the second sliding rail 22 through the other ends of the two linkage rods 28, so as to facilitate adjustment of the distance between the two support bars 13 arranged on the two conveying plates 8.

[0058] It can be understood that the vertical lifting movement of the one end of the two linkage rods 28 between the two conveying plates 8 can be achieved in various ways. The embodiment gives the following solutions:

[0059] As shown in Figure 3 and Figure 4 , the lifting structure includes an adjusting rod 24 arranged in the vertical direction and arranged at the top of the middle position of the bottom side of the second sliding rail 22, an adjusting screw rod 26 threaded in the adjusting slot 25 of the adjusting rod 24, an adjusting block 27 threaded on the rod body of the adjusting screw rod 26, and a motor for driving the adjusting screw rod 26 to rotate. The end of the adjusting block 27 is rotatably connected to the adjacent end of the two linkage rods 28.

[0060] The embodiment controls the rotation of the adjusting screw rod 26 in the adjusting slot 25 by the motor, which drives the adjusting block 27 to stably move along the length of the adjusting screw rod 26, thereby facilitating the stable lifting movement of the one end of the two linkage rods 28 in the vertical direction, so as to facilitate the control of the distance between the two support bars 13 by the second sliding rail 22 and the second sliding block 23.

[0061] Embodiment 2: For the above-mentioned embodiment 1, the top cover 17 is gradually and stably moved equidistantly on the two support bars 13 by the conveying assembly. The embodiment gives the following first solution.

[0062] As shown in Figure 3 and Figure 4 , two rotating grooves 19 are arranged at the two end positions of the opposite faces of the two conveying plates 8. The conveying assembly includes a rotating ring 20 rotatably arranged in the rotating groove 19, two lifting bars 14 arranged in parallel at the lower position between the two support bars 13, and two rotating columns rotatably arranged at the two end positions of the lifting bars 14. The two rotating columns at the two ends of the lifting bars 14 are arranged at different end faces of the rotating ring 20 on the conveying plate 8; the rotating ring 20 is located below the support bar 13; and the motor drives the rotating ring 20 to rotate in the rotating groove 19.

[0063] The control rotating ring 20 rotates in the rotating groove 19 on the conveying plate 8, that is, the two ends of the lifting bar 14 are driven to rotate around the circumference under the action of the rotating ring 20, and the support block 16 on the top of the vertical rod 15 is synchronously driven to rotate around the circumference. At this time, the support block 16 performs circular motion symmetrically above and below the support bar 13. The support block 16 is first tilted upward from one end of the position between the two support bars 13, and when it rotates to the position between the two support bars 13, the top end of the support block 16 contacts the top cover 17 placed on the two support bars 13, and the top cover 17 is lifted above the two support bars 13 and moves in a semicircle in the direction of the other end. When it rotates to the position of the two support bars 13, the top cover 17 on the support block 16 is blocked by the two support bars 13, and the top cover 17 is placed on the position of the two support bars 13, thereby driving the top cover 17 to move along the length of the rod on the two support bars 13, achieving the step-by-step stable movement of the top cover 17 on the two support bars 13, and facilitating the subsequent film pasting operation when the top cover 17 is conveyed and moved to the positioning assembly position.

[0064] It can be understood that the step-by-step stable movement of the top cover 17 on the two support bars 13 by the conveying assembly can be achieved in various ways. The second solution is as follows:

[0065] As shown in Figure 5 The two conveying plates 8 are provided with rotating grooves 19 at the opposite ends, and the rotating grooves 19 have a rectangular frame structure. The conveying assembly includes rotating blocks provided in the rotating grooves 19 by driving members, two lifting bars 14 arranged in parallel below the two support bars 13, and two rotating columns provided in the two ends of the lifting bar 14. The two rotating columns in the two ends of the lifting bar 14 are connected to different rotating blocks on the conveying plate 8. The rotating block is below the support bar 13, and the driving member controls the rotating block to move in the rotating groove 19.

[0066] Compared with the first conveying assembly, the opening of the rotating groove 19 is in a rectangular frame structure. The rotating block is driven by the driving member to move circumferentially in the rotating groove 19. First, when the rotating block moves upward in the vertical groove on one side of the rotating groove 19, the support block 16 on the top of the vertical rod 15 is driven to move upward synchronously. When the support block 16 moves to the position between the two support strips 13, the top end of the support block 16 contacts the top cover 17 placed on the two support strips 13, the top cover 17 is lifted and moves upward on the two support strips 13, and moves to the horizontal groove above the rotating groove 19. The driving member drives the rotating block to move in the horizontal groove to the vertical groove on the other side. The support block 16 drives the top cover 17 on the support strip 13 to move in the length direction of the support strip 13. When the rotating block moves downward to the position between the two support strips 13, the top cover 17 on the support block 16 is placed on the position between the two support strips 13 under the action of the two support strips 13, so as to drive the top cover 17 to move on the two support strips 13 in the length direction of the rod, and to control the stable movement of the top cover 17 on the two support strips 13 at equal intervals. When the top cover 17 is conveyed and moves to the position of the positioning assembly, the subsequent film pasting operation is facilitated.

[0067] It can be understood that the circumferential movement of the rotating block in the rotating groove 19 can be realized in various ways. The embodiment gives the following solutions:

[0068] As shown in Figure 5 , the driving member includes a connecting rod arranged between the two lifting strips 14 and connected to the two lifting strips 14, a second moving cylinder 30 arranged in a vertical direction and having a top output end connected to the connecting rod, a third sliding block 32 arranged at the bottom of the second moving cylinder, a third sliding rail 31 arranged in the length direction of the support strip 13 and arranged at the bottom of the third sliding block 32, and a first moving cylinder 29 driving the third sliding block 32 to slide on the third sliding rail 31.

[0069] The first moving cylinder 29 and the second moving cylinder 30 can be used to control the movement of the rotating block in the horizontal groove and the vertical groove in the rectangular frame structure, and the circumferential movement of the rotating block in the rotating groove 19.

[0070] The limiting telescopic rod 21 is vertically connected between the two lifting rods 14. The limiting telescopic rod 21 ensures the synchronous and stable movement of the two lifting rods 14 under the condition of stable distance adjustment between the two conveying plates 8.

[0071] Embodiment 3: For the positioning of the top cover 17 by the positioning assembly in the above-mentioned embodiment 1 or embodiment 2, the following solutions are given in this embodiment.

[0072] As shown in Figure 6 andFigure 7 As shown, the positioning assembly includes a positioning block 33 arranged between the support blocks 16 at the top of each pair of vertical rods 15, two elongated rods 34 fixedly arranged on one end of the positioning block 33 near the support blocks 16, two elongated arms 35 movably sleeved on the shafts of different elongated rods 34 at their ends close to each other, and a positioning member arranged on the positioning block 33 and controlling the central positioning of the top cover 17. Two positioning telescopic rods 36 are arranged in the elongated arms 35 and connected to the inner walls of the elongated arms 35 and the elongated rods 34 at their two ends. The positioning telescopic rods 36 have positioning springs 37 movably sleeved on their shafts.

[0073] In this embodiment, the positioning block 33 is located directly below the adsorption head 11. The elongated rods 34 movably arranged in the elongated arms 35 and the positioning springs 37 on the shafts of the positioning telescopic rods 36 ensure that the positioning block 33 is located at the middle position between the two corresponding support blocks 16, providing a positioning basis for the subsequent central positioning of the top cover 17 on the positioning block 33.

[0074] As shown, Figures 7-9 The positioning member includes two first rotating rods 39 rotatably arranged at the center of the bottom of the positioning block 33, two control rods 38 arranged between each pair of vertical rods 15 and symmetrically arranged about the positioning block 33, a second rotating rod 42 arranged at the top side of the end of the first rotating rod 39 in the vertical direction, a sliding block 41 fixedly arranged at the top side of the two ends of the control rod 38, and a control structure controlling the approach or separation of the two control rods 38. The shafts of the two ends of the first rotating rod 39 are provided with sliding grooves 40, and the sliding block 41 is slidably arranged in the sliding grooves 40.

[0075] When the top cover 17 is conveyed to the positioning block 33, the control structure is activated to drive the two control rods 38 to approach or separate from each other. At this time, the sliding block 41 arranged at the end of the control rod 38 slides in the sliding groove 40, driving the first rotating rod 39 to rotate about the center of the bottom of the positioning block 33, and then transmitting power through the second rotating rod 42 to control the second rotating rod 42 at the end of the first rotating rod 39 to clamp and fix the top cover 17 located on the positioning block 33, thereby controlling the central positioning and fixation of the top cover 17 on the positioning block 33. This complex but orderly movement of multiple rods precisely positions the top cover 17 in multiple directions, ensuring that the top cover 17 is in the correct position when the film is attached, improving the precision and quality of the film attachment. The sizes of the top covers of different batches of batteries may differ, and the clamping and positioning action of the four second rotating rods 42 can flexibly adapt to the positioning needs of top covers 17 of different sizes. Regardless of the length and width of the top cover 17, the positioning member can accurately position the top cover 17 at the desired position required by the film attachment mechanism through precise mechanical movement, enhancing the versatility and adaptability of the device.

[0076] The positioning member cooperates with the conveying assembly. When the conveying assembly conveys the top cover 17 to the positioning block 33, the positioning member starts to act and precisely positions the top cover 17. After positioning, the suction head 11 controls the protective film 18 to be attached to the top cover 17 at the accurate position. The precise positioning of the positioning member provides a reliable basis for the subsequent film-attaching process, ensures smooth operation of the entire film-attaching process, and improves the overall operation efficiency and production rhythm of the device.

[0077] It can be understood that the mutual approach between the two control rods 38 can be achieved in various ways. The embodiment gives the following solution:

[0078] As shown in Figures 8-10 , the control structure includes two moving blocks symmetrically arranged on the two side surfaces of the positioning block 33, two moving rods 46 arranged in the vertical direction and sleeved on the moving blocks through the moving grooves in the rod bodies, a clamping telescopic rod 43 arranged between the two control rods 38 and connected to the two control rods 38, respectively, and a clamping spring 44 sleeved on the rod body of the clamping telescopic rod 43. When the clamping spring 44 is in the normal elongation state, the second rotating rod 42 is located away from the positioning block 33. The bottom end of the moving rod 46 is arranged in the inclined groove 45 arranged on the top side of the control rod 38, and the bottom walls of the control rod 38 and the inclined groove 45 are both inclined surfaces, which gradually move away from the positioning block 33 from top to bottom.

[0079] When the top cover 17 controlled by the conveying assembly moves to the positioning block 33, and the protective film 18 is moved by the suction head 11 to the direction of the positioning block 33, the bottom side of the output end of the second lifting cylinder 10 first abuts against the top of the moving rod 46, and synchronously pushes the moving rod 46 to move downward. At this time, due to the inclined pushing action of the end of the moving rod 46 and the inclined surface of the bottom wall of the inclined groove 45, the two control rods 38 are driven to approach each other. At this time, the clamping spring 44 on the rod body of the clamping telescopic rod 43 between the two control rods 38 is compressed, and the four second rotating rods 42 are driven to centrally position and fix the top cover 17 on the positioning block 33. At this time, the suction head 11 precisely attaches the film to the top of the top cover 17, improves the film-attaching effect and precision of the top cover 17. After the film-attaching of the suction head 11 is completed, the first lifting cylinder 9 and the second lifting cylinder 10 drive the suction head 11 to move upward. At this time, the clamping spring 44 returns to the normal length under the action of the elastic force, drives the two control rods 38 to move away from each other, and thus drives the four second rotating rods 42 to move away from the positioning block 33, so as to facilitate the positioning and film-attaching of the next top cover 17 moved to the positioning block 33.

[0080] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A battery cell top cover film application device, comprising a conveying mechanism for conveying a top cover (17) and a film application mechanism for applying film to the top cover (17), characterized in that, The conveying mechanism includes two parallel support bars (13), a distance adjustment component for adjusting the distance between the two support bars (13), a conveying component disposed between the two support bars (13), and a positioning component disposed on the conveying component for positioning the top cover (17). The top cover (17) is placed on the two support bars along the length direction perpendicular to or parallel to the length direction of the support bars (13). Before applying the film to the top cover (17) of the battery cell, the distance adjustment assembly adjusts the distance between the two support bars (13) to match the top cover (17) being transported. When the top cover (17) is being filmed, the top cover (17) is placed one by one on one end of the top side of the two support bars (13). The conveying component controls the top cover (17) to move gradually along the length direction on the two support bars (13). When the top cover (17) moves to the positioning component, the filming mechanism applies film to the top cover (17) after it has been positioned by the positioning component. The adjustable distance assembly includes two parallel and symmetrically arranged conveyor plates (8) on opposite sides of two support bars (13), multiple vertical rods (15) arranged in pairs at equal intervals along the length of the support bars (13) between the two support bars (13), a support block (16) arranged horizontally and vertically on the top of the vertical rod (15), and an adjustable distance component that controls the two conveyor plates (8) to move closer or further apart from each other. The conveyor assembly is set on the opposite surfaces of the two conveyor plates (8) and controls the multiple vertical rods (15) to rotate around the circumference. Each pair of two vertical rods (15) are respectively close to different support bars (13), and the multiple vertical rods (15) are connected to the conveyor assembly. The positioning assembly includes a positioning block (33) positioned between the support block (16) at the top of each of the two vertical rods (15), two extension rods (34) fixedly mounted on the end of the positioning block (33) near the support block (16), two extension arms (35) movably mounted on the rods of different extension rods (34) with their ends close to each other, and a positioning element mounted on the positioning block (33) to control the center positioning of the top cover (17), two positioning telescopic rods (36) passing through the extension arms (35) and connected at both ends to the inner wall of the extension arms (35) and the extension rods (34) respectively, and a positioning spring (37) movably mounted on the rod of the positioning telescopic rod (36).

2. The cell top cover film application device according to claim 1, characterized in that: Rotating grooves (19) are provided at both ends of the opposite sides of the two conveying plates (8). The conveying assembly includes a rotating ring (20) that rotates through the rotating groove (19), two lifting bars (14) that are parallel to each other and located below the two support bars (13), and two rotating columns that rotate through the two ends of the lifting bars (14). The two rotating columns at the two ends of the lifting bars (14) are respectively located on the end faces of different rotating rings (20) on the conveying plate (8). The rotating rings (20) are located below the support bars (13). The motor drives the rotating rings (20) to rotate in the rotating groove (19).

3. The cell top cover film application device according to claim 1, characterized in that: Rotating grooves (19) are provided at both ends of the opposite sides of the two conveying plates (8). The opening of the rotating grooves (19) is a rectangular frame structure. The conveying assembly includes a rotating block that passes through the rotating groove (19) through a driving member, two lifting bars (14) that are parallel to each other and located below the two support bars (13), and two rotating columns that are rotatably passed through the two ends of the lifting bars (14). The two rotating columns at the two ends of the lifting bars (14) are respectively connected to different rotating blocks on the conveying plates (8). The rotating blocks are located below the support bars (13), and the driving member controls the rotating blocks to move in the rotating grooves (19).

4. The cell top cover film application device according to claim 3, characterized in that: The driving component includes a connecting rod disposed between and connecting the two lifting bars (14), a second moving cylinder (30) disposed vertically and whose top output end is connected to the connecting rod, a third slider (32) disposed at the bottom of the second moving cylinder, a third slide rail (31) disposed at the bottom of the third slider (32) and disposed along the length direction of the support bar (13), and a first moving cylinder (29) that drives the third slider (32) to slide on the third slide rail (31).

5. The cell top cover film applicator according to any one of claims 2 to 4, characterized in that: The adjusting component includes two parallel second slide rails (22) arranged along the length of the vertical conveyor plate (8) on the bottom side of the conveyor plate (8), two second sliders (23) slidably sleeved on each second slide rail (22), a lifting structure arranged vertically at the middle position of the bottom side of the second slide rail (22), and two linkage rods (28) rotatably connected to the output end of the lifting structure at one end close to each other. The two linkage rods (28) are rotatably connected to different second sliders (23) on the second slide rail (22) at one end far away from each other. The two second sliders (23) arranged on the second slide rail (22) are respectively connected to different conveyor plates (8).

6. The cell top cover film application device according to claim 5, characterized in that: The lifting structure includes an adjusting rod (24) arranged vertically and positioned at the middle of the bottom side of the second slide rail (22), an adjusting screw (26) passing through an adjusting groove (25) on the adjusting rod (24), an adjusting block (27) threaded onto the adjusting screw (26), and a motor that drives the adjusting screw (26) to rotate. The end of the adjusting block (27) is rotatably connected to one end of two linkage rods (28).

7. The cell top cover film application device according to claim 1, characterized in that: The positioning component includes two first rotating rods (39) rotatably positioned at the bottom center of the positioning block (33), two control rods (38) parallel to each other and symmetrical about the positioning block (33) between the two vertical rods (15) in each group, a second rotating rod (42) rotatably positioned at the top side of the end of the first rotating rod (39) along the vertical direction, a sliding block (41) fixedly positioned at both ends of the top side of the control rod (38), and a control structure for controlling the two control rods (38) to move closer or further apart from each other. The first rotating rod (39) has sliding grooves (40) at both ends of its body, and the sliding block (41) slides through the sliding groove (40).

8. The cell top cover film application device according to claim 7, characterized in that: The control structure includes two movable blocks symmetrically arranged on both sides of the positioning block (33), two movable rods (46) arranged vertically and sleeved on the movable blocks through movable grooves opened on the rod body, a clamping telescopic rod (43) arranged between the two control rods (38) and connected to the two control rods (38) respectively, and a clamping spring (44) sleeved on the rod body of the clamping telescopic rod (43). When the clamping spring (44) is in the normal extended state, the second rotating rod (42) is located away from the positioning block (33). The bottom end of the movable rod (46) passes through the inclined groove (45) opened on the top side of the control rod (38), and the bottom wall of the control rod (38) and the inclined groove (45) are both inclined surfaces, and the inclined surfaces gradually move away from the positioning block (33) from top to bottom.

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