Battery cell top cover film pasting device

Abstract

The invention provides a battery cell top cover film pasting device, which relates to the technical field of battery processing, and comprises a conveying mechanism for conveying a top cover, and a film pasting mechanism for pasting a film on the top cover, the conveying mechanism comprises two supporting strips arranged in parallel, a distance adjusting assembly for adjusting the distance between the two supporting strips, a conveying assembly arranged between the two supporting strips and a positioning assembly arranged on the conveying assembly and used for positioning the top cover. The length direction of the top cover is vertical to or parallel to the length direction of the supporting strips and is overlapped on the two supporting strips; when the top cover is subjected to film pasting operation, the conveying assembly controls the top cover to gradually move on the two supporting strips at the same distance in the length direction, and when the top cover moves to the positioning assembly, the film pasting mechanism conducts film pasting on the top cover positioned by the positioning assembly. The battery cell top cover film pasting device can be flexibly matched with battery cell top covers of multiple sizes conveniently, meanwhile, accurate conveying and positioning of the top covers are achieved, and the film pasting efficiency and the film pasting precision of the battery cell top covers are effectively improved.

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: 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.

[0004] 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 sway, 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.

[0005] 3. Some traditional film sticking devices have low automation level and require a large amount of manual operation. The placement of top covers and the adjustment of positions need to be completed by manual operation, which not only increases the labor intensity, but also easily leads to 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

[0006] In view of the above problems, the present application provides a kind of top cover film sticking device of battery cell.

[0007] 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; 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; 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; The distance adjusting assembly comprises two mutually parallel and symmetrically arranged conveying plates arranged on the side surfaces of the two support bars on the opposite sides, a plurality of vertical rods arranged between the two support bars at equal intervals along the length direction of the support bars, a support block vertically arranged on the top of the vertical rod, and a distance adjusting piece for controlling the two conveying plates to move closer to or away from each other, and the conveying assembly is arranged on the opposite surfaces of the two conveying plates and controls the plurality of vertical rods to rotate around the circumference; each group of two vertical rods corresponds to the different support bars close to each other, and the plurality of vertical rods are connected to the conveying assembly; 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] The beneficial effects of the present application are as follows: 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 a new size specification cell is produced, the entire film sticking device does not need to be replaced, only the distance adjusting assembly needs to be simply adjusted to continue using. This not only reduces the equipment update cost of enterprises, but also shortens the equipment adjustment period.

[0016] 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 with the same distance. This precise conveying method can effectively avoid the problems of 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.

[0017] 3. The film sticking device of the present application realizes automatic operation from top cover conveying, positioning to film sticking, greatly reducing the links of manual participation. 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

[0018] 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 together with the description serve to explain the principles of the application, and should not be taken as limiting the application, in the drawings: Figure 1 The schematic diagram of simple structure of the top cover film pasting device for battery cell proposed in the application.

[0019] Figure 2 The schematic diagram of one side structure of the top cover film pasting device for battery cell proposed in the application.

[0020] Figure 3 The schematic diagram of the conveying mechanism structure of the application.

[0021] Figure 4 The schematic diagram of the conveying mechanism working state structure of the application.

[0022] Figure 5 The schematic diagram of the second conveying assembly structure of the application.

[0023] Figure 6 The schematic diagram of the positioning assembly structure of the application.

[0024] Figure 7 The schematic diagram of the positioning member structure of the application.

[0025] Figure 8 The schematic diagram of the positioning member unfolding structure of the application.

[0026] Figure 9 The schematic diagram of the positioning member unfolding bottom view structure of the application.

[0027] Figure 10 The schematic diagram of the moving rod and control rod structure of the application.

[0028] Figure 11 The schematic diagram of the film pasting assembly structure of the application.

[0029] 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

[0030] 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.

[0031] At present, with the rapid 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 cores 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 safety hazards such as short circuit, but also can play a protective role, improve the overall reliability and service life of the electric core.

[0032] 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 structural 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 of production enterprises when they 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 compatible with the new size of the top cover. This not only puts a heavy burden on the equipment procurement costs of 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 specifications of equipment.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In order to facilitate understanding of the improvement basis of the present application, the following is 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.

[0037] 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.

[0038] 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.

[0039] 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, and 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 drive the first sliding block 7 to move along the first sliding rail 6, and 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 to realize the 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, so as to paste the protective film 18 on the top cover 17 and complete the film pasting.

[0040] 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.

[0041] 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, so as to facilitate the pasting operation of the top cover 17 of different batches and models, and improve the versatility of the device.

[0042] 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.

[0043] 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.

[0044] The distance adjusting assembly adjusts the distance between the two support strips 13. The embodiment provides the following solutions: 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.

[0045] 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 close to or away from each other under the action of the distance adjusting member, so as to realize 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 rod 15, the support block 16 located at the top of the vertical rod 15 rotates around the circumference in the parallel plane between the two support bars 13, that is, the support block 16 is lifted from the two support bars 13 and rotates 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 block 16 is supported by the two support bars 13, at this time the top cover 17 is placed on the two support bars 13, so as to realize the control of the distance of the top cover 17 moving around the circumference along the length of the support bar 13, and realize 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.

[0046] The design of the plurality of vertical rods 15 arranged in pairs at equal intervals and the conveying assembly controlling the vertical rod 15 to rotate around the circumference makes the top cover 17 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 beneficial to the accurate positioning of the subsequent positioning assembly and the high-quality film pasting of the film pasting mechanism, thereby improving the stability and product quality of the entire film pasting production process. Under the condition of adjusting the distance between the two conveying plates 8, the precision of conveying the top cover 17 is improved.

[0047] It can be understood that the distance between the two support bars 13 can be adjusted in various ways. The embodiment gives the following solutions: 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 at the middle position of the bottom side of the second sliding rail 22 in the vertical direction, and two linkage rods 28 rotatably connected to the output end of the lifting structure at one end, and the other end of the two linkage rods 28 is 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.

[0048] 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 rails 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 stably moved away from or close to each other on the second sliding rails 22 through the other ends of the two linkage rods 28, so as to facilitate the adjustment of the distance between the two support bars 13 arranged on the two conveying plates 8.

[0049] It can be understood that the vertical lifting movement of the two ends of the two linkage rods 28 can be achieved in various ways. The embodiment gives the following solutions: 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 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.

[0050] 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 move stably along the length of the adjusting screw rod 26, so as to facilitate the stable lifting movement of the two ends of the two linkage rods 28 in the vertical direction, and facilitate the control of the distance between the two support bars 13 by the second sliding rail 22 and the second sliding block 23.

[0051] 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.

[0052] As shown in Figure 3 and Figure 4 , the two ends of the opposite faces of the two conveying plates 8 are provided with rotating grooves 19, the conveying assembly includes a rotating ring 20 rotatably arranged in the rotating groove 19, two lifting bars 14 arranged in parallel and below the two support bars 13, and two rotating columns rotatably arranged on the two ends of the lifting bar 14. The two rotating columns on the two ends of the lifting bar 14 are arranged on the 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.

[0053] 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 circumferential motion symmetrically above and below the support bar 13. The support block 16 is first tilted upward from one end 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.

[0054] 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 given as follows: As shown in Figure 5 two ends of the two conveying plates 8 are provided with rotating grooves 19, and the rotating grooves 19 are rectangular frame structures. 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 on 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.

[0055] Compared with the first conveying assembly, the opening of the rotating groove 19 is in a rectangular frame structure. The driving member drives the rotating block 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, and the top cover 17 is lifted and moves upward on the two support strips 13. When the rotating block moves to the horizontal groove above the rotating groove 19, the driving member drives the rotating block to move horizontally in the rotating groove 19 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 along the length direction of the support strip 13, and to control the stable movement of the top cover 17 on the two support strips 13 at equal intervals, so as to facilitate the subsequent film pasting operation when the top cover 17 is conveyed to the position of the positioning assembly.

[0056] 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 solution: 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 vertically 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 along 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.

[0057] The first moving cylinder 29 and the second moving cylinder 30 can control the movement of the rotating block in the horizontal groove and the vertical groove in the rectangular frame structure, and realize the circumferential movement of the rotating block in the rotating groove 19.

[0058] The two lifting rods 14 are vertically connected to the limiting telescopic rod 21. The limiting telescopic rod 21 ensures the stable movement of the two lifting rods 14 between the two conveying plates 8.

[0059] 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 solution is given in this embodiment.

[0060] As shown in Figure 6 and Figure 7As shown, the positioning assembly comprises a positioning block 33 arranged between the support blocks 16 at the top of each group of two vertical rods 15, two elongated rods 34 respectively fixedly arranged on one end of the positioning block 33 close to the support blocks 16, two elongated arms 35 respectively movably sleeved on the bodies of different elongated rods 34 at one end 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 respectively arranged in the elongated arms 35 and respectively connected to the inner walls of the elongated arms 35 and the elongated rods 34 at both ends. The bodies of the positioning telescopic rods 36 movably sleeve the positioning springs 37.

[0061] In this embodiment, the positioning block 33 is located directly below the adsorption head 11. Through the elongated rods 34 movably arranged in the elongated arms 35 and the positioning springs 37 arranged on the bodies of the positioning telescopic rods 36, the positioning block 33 is ensured to be located at the middle position between the two corresponding support blocks 16, thereby providing a positioning basis for the subsequent central positioning of the top cover 17 on the positioning block 33.

[0062] As shown, Figures 7-9 The positioning member comprises two first rotating rods 39 rotatably arranged at the center position of the bottom of the positioning block 33, two control rods 38 arranged between each group of two vertical rods 15 at a position symmetrical 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 a vertical manner, a sliding block 41 fixedly arranged at the top side of both ends of the control rod 38, and a control structure controlling the mutual approach or mutual departure of the two control rods 38. The bodies of both 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.

[0063] When the top cover 17 is conveyed to the positioning block 33, the control structure is started to drive the two control rods 38 to approach or depart 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 to drive the first rotating rod 39 to rotate around the center position of the bottom of the positioning block 33, and then the power is transmitted 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 located on the positioning block 33. This complex but orderly movement mode of multi-rod linkage precisely positions the top cover 17 in multiple directions to ensure that the top cover 17 is in the correct position when the film is attached, thereby improving the precision and quality of the film attachment. The sizes of the top covers of different batches of battery cells may be different. Through the clamping and positioning action of the four second rotating rods 42, the positioning demand of top covers 17 of different sizes can be flexibly adapted. Regardless of the length and width of the top cover 17, the positioning member can accurately position the top cover 17 at the ideal position required by the film attachment mechanism through precise mechanical movement, thereby enhancing the universality and adaptability of the device.

[0064] 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 to accurately position the top cover 17. After positioning, the suction head 11 controls the protective film 18 to perform the film pasting operation on the top cover 17 at the accurate position. The accurate positioning of the positioning member provides a reliable basis for the subsequent film pasting process, ensures the smooth progress of the entire film pasting process, and improves the overall operation efficiency and production rhythm of the device.

[0065] 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: 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.

[0066] 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 accurately pastes the film on the top of the top cover 17, improves the film pasting effect and precision of the top cover 17. After the film pasting 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 pasting of the next top cover 17 moving to the positioning block 33.

[0067] 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. An electrode top cover film pasting device, comprising a conveying mechanism for conveying a top cover (17) and a film pasting mechanism for pasting a film on the top cover (17), characterized in that, The conveying mechanism comprises two mutually parallel support strips (13), a distance adjusting assembly adjusting the distance between the two support strips (13), a conveying assembly arranged between the two support strips (13), and a positioning assembly arranged on the conveying assembly and positioning the position of the top cover (17); the length direction of the top cover (17) is placed on the two support strips in a vertical or parallel manner with respect to the length direction of the support strips (13); Before the top cover (17) of the battery cell is pasted with a film, the distance adjusting assembly adjusts the distance between the two support strips (13) to match the top cover (17) to be conveyed; When the top cover (17) is pasted with a film, the top cover (17) is placed on one end of the top side of the two support strips (13) one by one, the conveying assembly controls the top cover (17) to move on the two support strips (13) in the length direction in a step-by-step and equal-distance manner, and when the top cover (17) moves to the positioning assembly, the film pasting mechanism pastes a film on the top cover (17) positioned by the positioning assembly; The distance adjusting assembly comprises two mutually parallel and symmetric conveying plates (8) arranged on the opposite sides of the two support strips (13), a plurality of vertical rods (15) arranged between the two support strips (13) in an equal-interval manner along the length direction of the support strips (13), a support block (16) arranged vertically on the top of the vertical rods (15), and a distance adjusting piece controlling the two conveying plates (8) to move closer to or farther away from each other; 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 in a circumferential direction; each group of two vertical rods (15) corresponds to the two support strips (13) close to each other, and the plurality of vertical rods (15) are connected to the conveying assembly; The positioning assembly comprises a positioning block (33) arranged between the top of each group of two vertical rods (15) and the support block (16), two elongated rods (34) respectively fixedly arranged on one end of the positioning block (33) close to the support block (16), two elongated arms (35) respectively movably sleeved on the rod bodies of different elongated rods (34) at one end close to each other, and a positioning piece arranged on the positioning block (33) and controlling the center positioning of the top cover (17); two positioning telescopic rods (36) are respectively arranged in the elongated arms (35) and connected to the inner walls of the elongated arms (35) and the elongated rods (34) at both ends; the positioning telescopic rods (36) are movably sleeved with positioning springs (37) on the rod bodies.

2. The cell top cover taping device of claim 1, wherein: Rotating grooves (19) are arranged at both ends of the opposite surfaces of the two conveying plates (8); the conveying assembly comprises a rotating ring (20) rotatably arranged in the rotating groove (19), two lifting strips (14) arranged in a mutually parallel manner below the two support strips (13), and two rotating columns rotatably arranged at both ends of the lifting strips (14); the two rotating columns at both ends of the lifting strips (14) are respectively arranged on the end surfaces of different rotating rings (20) on the conveying plates (8); the rotating ring (20) is located below the support strips (13); a motor drives the rotating ring (20) to rotate in the rotating groove (19).

3. The cell top cover taping device of claim 1, wherein: Two conveying plates (8) are provided with rotating grooves (19) at opposite ends, the rotating groove (19) opening is in the shape of a rectangular frame structure, the conveying assembly comprises rotating blocks provided in the rotating grooves (19) through driving members, two lifting rods (14) provided below the two support bars (13) and parallel to each other, and two rotating columns provided on the two ends of the lifting rod (14) and rotatingly provided in the lifting rod (14), and the two rotating columns on the two ends of the lifting rod (14) are respectively connected to different rotating blocks on the conveying plate (8); the rotating block is located below the support bar (13), and the driving member controls the rotating block to move in the rotating groove (19).

4. The cell top cover taping device of claim 3, wherein: The driving member comprises a connecting rod provided between the two lifting rods (14) and connected to the two lifting rods (14), a second moving cylinder (30) provided vertically and having a top output end connected to the connecting rod, a third sliding block (32) provided at the bottom of the second moving cylinder, a third sliding rail (31) provided at the bottom of the third sliding block (32) and along the length direction of the support bar (13), and a first moving cylinder (29) driving the third sliding block (32) to slide on the third sliding rail (31).

5. The cell top cover taping device of any one of claims 2 to 4, wherein: The distance adjusting member comprises two second sliding rails (22) parallel to each other and provided on the bottom side of the conveying plate (8) along the length direction of the conveying plate (8), two second sliding blocks (23) provided on each second sliding rail (22) in a group of two, a lifting structure provided vertically on the middle part 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, and the two linkage rods (28) are rotatably connected to different second sliding blocks (23) on the second sliding rail (22) at one end away from each other, and the two second sliding blocks (23) provided on the second sliding rail (22) are respectively connected to different conveying plates (8).

6. The cell top cover taping device of claim 5, wherein: The lifting structure comprises an adjusting rod (24) provided vertically and having a top provided at the middle part of the bottom side of the second sliding rail (22), an adjusting screw rod (26) provided in the adjusting groove (25) provided on the rod body of the adjusting rod (24), an adjusting block (27) provided on the rod body of the adjusting screw rod (26) through threaded connection, and a motor driving the adjusting screw rod (26) to rotate, and the end part of the adjusting block (27) is rotatably connected to the adjacent end of the two linkage rods (28).

7. The cell top cap taping device of claim 1, wherein: The positioning member comprises two first rotating rods (39) rotatably provided at the center position of the bottom of the positioning block (33), two control rods (38) provided between the two vertical rods (15) in each group and symmetrically about the positioning block (33), a second rotating rod (42) provided vertically and rotatably provided at the top side of the end part of the first rotating rod (39), a sliding block (41) fixedly provided at the top side of the two end parts of the control rod (38), and a control structure controlling the two control rods (38) to move close to each other or away from each other, and the rod body of the first rotating rod (39) is provided with a sliding groove (40) at both ends, and the sliding block (41) is slidingly provided in the sliding groove (40).

8. The cell top cover taping device of claim 7, wherein: The control structure comprises two moving blocks symmetrically arranged on the two side surfaces of the positioning block (33), two moving rods (46) vertically arranged and sleeved on the moving blocks through the moving grooves formed on the rod bodies, a clamping telescopic rod (43) arranged between the two control rods (38) and connected with the two control rods (38) respectively, and a clamping spring (44) sleeved on the rod body of the clamping telescopic rod (43), wherein the second rotating rod (42) is located away from the positioning block (33) when the clamping spring (44) is in the normal elongation state; the bottom end of the moving rod (46) is arranged in the inclined groove (45) formed 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.

Images