Battery cell isolating membrane tearing structure

Abstract

The invention relates to the technical field of battery production, and particularly discloses a battery cell isolation film tearing structure which comprises a workbench, a film tearing mechanism is arranged on the workbench, an isolation film body comprises a middle layer and release films on the two sides, easy-to-tear parts are arranged at the two ends of each release film, and the film tearing mechanism is used for adsorbing and loosening the easy-to-tear parts of the release films; the film tearing mechanism comprises two sets of suction cups, the suction cups are connected with an air pump, and the two sets of suction cups face the two easy-to-tear parts of the release film correspondingly. The air pump is arranged on the mounting plate, and the mounting plate is connected with the lifting plate. In the film tearing process, the two sides of a middle layer are pressed through the film pressing roller, the lifting mechanism drives the film tearing mechanism to continue to move upwards, a release film can be separated from the middle layer, in the process, the middle layer can be prevented from being lifted through extrusion of the film pressing roller, the middle layer after film tearing can be neatly arranged on the workbench, and the film tearing efficiency is improved. And when the intermediate layer is subsequently attached to the battery cell, the attached intermediate layer is relatively tidy.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery production, and in particular relates to a cell isolation film tearing structure. Background Art

[0002] The separator is a special thin film material that is mainly used to separate the positive and negative electrodes in the battery, preventing the two electrodes from direct contact and causing a short circuit, while allowing ions in the electrolyte to pass freely.

[0003] In the Chinese patent application CN 107985703 A, a fully automatic PET cover film peeling machine is disclosed, which includes a table, a platform for placing products on the table, and a film peeling mechanism that can move back and forth above the platform. The film peeling mechanism includes a row of bell housings with downward openings, each of which has an air pipe placed in it, and the pipe opening of the air pipe faces the inner wall of the bell housing.

[0004] However, the above device has the following problems during use:

[0005] Although the film tearing mechanism can absorb the surface film and tear it off by moving back and forth, during the tearing process, the surface film will generate a pulling force on the bottom film. The pulling force can easily cause the bottom film to shift. As the tearing mechanism moves more, the connection between the surface film and the bottom film gradually shortens, and the movement of the bottom film becomes more obvious.

[0006] Therefore, when the above-mentioned device is used to tear off the release film on the surface of the isolation membrane, wrinkles will appear on the isolation membrane. The wrinkled isolation membrane will be unevenly adhered to the battery cell, which will reduce the performance of the produced battery. Therefore, this application proposes a battery cell isolation membrane tearing structure. Summary of the Invention

[0007] The object of the present invention is to provide a cell separator tearing structure to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a cell separator film tearing structure, comprising a workbench, a film tearing mechanism disposed on the workbench, the separator film body comprising an intermediate layer and release films on both sides, each end of the release film being provided with an easy-tear portion, and the film tearing mechanism being used to absorb and release the easy-tear portion of the release film;

[0009] The film tearing mechanism includes a suction cup connected to an air pump, and two groups of suction cups are provided, and the two groups of suction cups are respectively facing the two easy-to-tear parts of the release film;

[0010] The air pump is arranged on a mounting plate, and the mounting plate is connected to the lifting plate;

[0011] The film tearing mechanism is connected to a lifting mechanism for driving it to move up and down;

[0012] Two film pressing mechanisms are installed on the workbench. The film pressing mechanisms include film pressing rollers. The film pressing rollers have at least two states including a film pressing state and a separation state. In the film pressing state, the film pressing rollers are against the upper side of the isolation film body.

[0013] Preferably, the mounting plate is provided with two sliding blocks symmetrically distributed about its center line, the two sliding blocks are respectively provided on two guide rails, and the guide rails are connected to the lifting plate via pins.

[0014] Preferably, a threaded sleeve is installed on the lower side of the mounting plate, the threaded sleeve is connected to the lead screw, the threads of the lead screw corresponding to the two threaded sleeve positions have opposite rotation directions, and the lead screw is connected to the output shaft of the drive motor through a gear set, and the drive motor is connected to the lifting plate through a motor bracket.

[0015] Preferably, a lifting guide unit is installed between the lifting plate and the workbench, and the lifting guide unit includes a guide tube and a guide rod, wherein the guide tube is installed on the workbench, and the guide rod is installed on the lifting plate, and the guide tube and the guide rod are plugged into each other.

[0016] Preferably, the lamination mechanism includes a lamination roller, and both ends of the lamination roller are respectively inserted into two connecting plates.

[0017] Preferably, the connecting plate is connected to the support seat, and the connecting plate is connected to an angle adjustment motor for driving the forward and reverse rotation thereof.

[0018] Preferably, one of the support seats in the film pressing mechanism is installed on a driving member, and the driving member is connected to the driving track on the workbench. The driving member is used to drive the support seat and the film pressing roller to move back and forth in a direction parallel to the isolation film body, and the direction of movement of the driving member is perpendicular to the direction of movement of the transverse movement module.

[0019] Preferably, it also includes a loading and unloading clamping unit, which is used to clamp and release the isolation membrane body. The loading and unloading clamping unit is connected to a lifting module for driving it to move up and down, and the lifting module is connected to a transverse movement module for driving it and the loading and unloading clamping unit to move.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the process of film tearing, the isolation film body is placed on the workbench. After the two sets of suction cups in the film tearing mechanism are respectively connected to the two easy-to-tear parts, the lifting mechanism first drives it to move upward for a distance. At this time, the two film pressing mechanisms are started, and the angle adjustment motors therein drive the film pressing rollers to rotate, so that the film pressing rollers rotate to the film pressing state. At this time, the film pressing rollers are against the position of the easy-to-tear part in the release film of the middle layer, pressing both sides of the middle layer. In this way, the lifting mechanism drives the film tearing mechanism to continue to move upward, which can separate the release film from the middle layer. During the process, the squeezing of the film pressing rollers can prevent the middle layer from being lifted up. After the film is torn, the middle layer can be neatly arranged on the workbench. When the middle layer is subsequently bonded to the battery cell, the bonded middle layer is relatively neat.

[0022] 2. The film tearing mechanism of the present invention is provided with components such as a driving motor. The driving motor drives the screw to rotate forward and reverse through a gear set. The screw can drive the two threaded sleeves to move closer to or away from each other, and the threaded sleeves are connected to their respective mounting plates. Therefore, the rotation of the driving motor can drive the two suction cups to move closer to or away from each other, and adjust the distance between the two so that the two can be aligned with the two easy-to-tear parts of the release film respectively, and can adapt to the adsorption work of release films of various sizes.

[0023] 3. The present invention is internally provided with components such as loading and unloading clamping units. The lifting module can drive the loading and unloading clamping units to move up and down, and the transverse movement module can drive them to move left and right. The two cooperate with each other to realize the loading and unloading work of the isolation membrane body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the structural schematic diagrams of the cell isolation film tearing structure of the present invention.

[0025] Figure 2 This is the second structural schematic diagram of the cell isolation film tearing structure of the present invention.

[0026] Figure 3 This is the third structural schematic diagram of the cell isolation film tearing structure of the present invention.

[0027] Figure 4 This is one of the structural schematic diagrams of the film tearing mechanism in the present invention.

[0028] Figure 5 This is the second structural diagram of the film tearing mechanism in the present invention.

[0029] Figure 6 This is the third structural diagram of the film tearing mechanism in the present invention.

[0030] Figure 7 It is a structural schematic diagram of the membrane pressing mechanism in the present invention.

[0031] In the figure: 1, workbench; 2, isolation film body; 201, middle layer; 202, release film; 203, easy-tear portion;

[0032] 3. Film tearing mechanism; 301. Suction cup; 302. Air pump; 303. Mounting plate; 304. Slider; 305. Guide rail; 306. Threaded sleeve; 307. Lead screw; 308. Drive motor; 4. Lifting mechanism; 5. Lifting guide unit; 501. Guide tube; 502. Guide rod;

[0033] 6. Laminating mechanism; 601. Laminating roller; 602. Connecting plate; 603. Angle adjustment motor; 604. Support seat; 605. Driving part; 606. Driving track; 7. Loading and unloading clamping unit; 8. Lifting module; 9. Transverse movement module. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Reference Figure 1-Figure 7 A cell isolation film tearing structure includes a workbench 1, on which a film tearing mechanism 3 is provided. It should be noted that the isolation film body 2 includes an intermediate layer 201 and release films 202 on both sides, and both ends of the release film 202 are provided with easy-tear portions 203. There is no glue bonding between the easy-tear portions 203 and the intermediate layer 201, while the two at other positions are bonded by glue. The film tearing mechanism 3 is used to absorb and release the easy-tear portions 203 of the release film 202. Specifically, when the film tearing mechanism 3 is started, it can absorb the release film 202 at the easy-tear portions 203, and then the entire film tearing mechanism 3 moves upward to complete the separation between it and the intermediate layer 201.

[0036] The film tearing mechanism 3 cooperates with the lifting mechanism 4 to tear off the release film 202 on the upper surface of the middle layer 201, and then the middle layer 201 is attached to one of the battery cells so that the middle layer 201 and the battery cell are neatly attached together.

[0037] In further embodiments, reference may be made to Figure 4-Figure 6The film-tearing mechanism 3 includes a suction cup 301, which faces one side of the workbench 1 and is connected to an air pump 302. It should be noted that there are four suction cups 301, and the four suction cups 301 are grouped in pairs. Each group of suction cups 301 faces two easy-tear portions 203 of the release film 202, that is, two suction cups 301 are correspondingly provided at each easy-tear portion 203. When the air pump 302 is started, the suction cups 301 can be made to stick to the release film 202 or to release the release film 202.

[0038] Specifically, the air pump 302 is set on the mounting plate 303, the mounting plate 303 is connected to the lifting plate, and two sliders 304 symmetrically distributed about its center line are installed on the mounting plate 303. The two sliders 304 are respectively installed on two guide rails 305, and the guide rails 305 are connected to the lifting plate through pins.

[0039] The sizes of the isolation membrane bodies 2 that need to be fitted on battery cells of different sizes are different, and the positions of the corresponding suction cups 301 are also different. In order to allow the suction cups 301 to be aligned with the tearable parts 203 in multiple isolation membrane bodies 2 of different specifications, a threaded sleeve 306 is installed on the lower side of the mounting plate 303. The threaded sleeve 306 is connected to the lead screw 307. The thread rotation directions of the lead screw 307 corresponding to the two threaded sleeves 306 are opposite, and the lead screw 307 is connected to the output shaft of the drive motor 308 through a gear set, and the drive motor 308 is connected to the lifting plate through a motor bracket.

[0040] The driving motor 308 drives the screw 307 to rotate forward and backward through the gear set. The screw 307 can drive the two threaded sleeves 306 to move closer to or away from each other, and the threaded sleeves 306 are connected to their respective mounting plates 303. Therefore, the rotation of the driving motor 308 can drive the two suction cups 301 to move closer to or away from each other, and adjust the distance between the two so that the two can be aligned with the two easy-to-tear parts 203 in the release film 202 respectively. It should be noted that when tearing the film, one group of suction cups 301 can be aligned with one of the easy-to-tear parts 203, and the other group of suction cups 301 can be used as a spare, or both groups of suction cups 301 can be used at the same time.

[0041] In a further embodiment, the film tearing mechanism 3 is connected to a lifting mechanism 4 for driving it to move up and down. The film tearing mechanism 3 adsorbs the easy-to-tear portion 203 of the release film 202, and then the lifting mechanism 4 drives the film tearing mechanism 3 to move upward, which can change the distance between it and the middle layer 201, and finally the upper release film 202 is torn off.

[0042] It should be noted that a lifting guide unit 5 is installed between the lifting plate and the workbench 1. The lifting guide unit 5 includes a guide tube 501 and a guide rod 502. The guide tube 501 is installed on the workbench 1, and the guide rod 502 is installed on the lifting plate. The guide tube 501 and the guide rod 502 are plugged into each other.

[0043] During the film tearing process, one set of suction cups 301 is aligned with a single easy-tear portion 203. In this way, the pulling force applied to the release film 202 to rise only comes from one set of suction cups 301. When the release film 202 is about to reach the easy-tear portion 203 on the other side, it is easy for the release film 202 to pull up the middle layer 201 on that side. If the two sets of suction cups 301 apply force at the same time, the middle layer 201 at the middle part will be easily lifted upwards during the process of the release film 202 being torn apart. The above two methods of tearing the film will both cause the middle layer 201 to be pulled up before the film is torn off. After the film is torn off, the middle layer 201 will not be neatly and flatly attached to the workbench 1, so two film pressing mechanisms 6 are installed on the workbench 1, and the two film pressing mechanisms 6 correspond to the two easy-to-tear portions 203 respectively. When the film pressing mechanisms 6 are started, they can press the area of ​​the middle layer 201 directly below the easy-to-tear portion 203, so that when the two sets of suction cups 301 tear the film together, the entire middle layer 201 is squeezed by the two film pressing mechanisms 6, so that it remains stable and avoids it from lifting to the upper side. Finally, the middle layer 201 after tearing the film can be neatly distributed on the workbench 1, which is convenient for subsequent bonding with the battery cell.

[0044] Specifically, the film pressing mechanism 6 includes a film pressing roller 601, both ends of which are respectively inserted into two connecting plates 602, the connecting plates 602 are connected to the support seat 604, and the connecting plates 602 are connected to the angle adjustment motor 603 for driving its forward and reverse rotation. The angle adjustment motor 603 drives the film pressing roller 601 to rotate through the connecting plate 602, so that the film pressing roller 601 has at least two states including a film pressing state and a separation state. In the film pressing state, the film pressing roller 601 is against the upper side of the isolation film body 2; in the separation state, it is not on the upper side of the isolation film body 2, and will not hinder the movement of components such as the suction cup 301.

[0045] After the two groups of suction cups 301 in the film tearing mechanism 3 are respectively connected to the two easy-to-tear parts 203, the lifting mechanism 4 first drives it to move a distance to the upper side. At this time, the two film pressing mechanisms 6 are started, and the angle adjustment motor 603 therein drives the film pressing roller 601 to rotate, so that the film pressing roller 601 rotates to the film pressing state. At this time, the film pressing roller 601 is against the position of the easy-to-tear part 203 in the release film 202 of the middle layer 201, pressing both sides of the middle layer 201. In this way, the middle layer 201 can be prevented from being lifted up, and the middle layer 201 after tearing can be neatly arranged on the workbench 1.

[0046] More specifically, the support seat 604 in one of the film pressing mechanisms 6 is installed on the driving member 605, and the driving member 605 is connected to the driving track 606 on the workbench 1. The driving member 605 has a power function. The driving member 605 is used to drive the support seat 604 and the film pressing roller 601 to move back and forth in a direction parallel to the isolation film body 2. The direction of movement of the driving member 605 is perpendicular to the direction of movement of the transverse movement module 9.

[0047] Before the suction cup 301 in the film tearing mechanism 3 adsorbs the release film 202, the film pressing mechanism 6 connected to the driving member 605 can be started to rotate the film pressing roller 601 therein to the film pressing state. At this time, the film pressing roller 601 is pressed on the upper side of the release film 202, and then driven by the driving member 605 to move back and forth along the upper surface of the release film 202 to flatten the upper surface of the release film 202. In this way, even if the release film 202 is uneven due to airflow and other reasons after the isolation film body 2 is placed on the workbench 1, it can still be smoothed, so that the suction cup 301 in the film tearing mechanism 3 can adsorb the release film 202, and there are no wrinkles at the adsorption points, so that the adsorption force is relatively stable, and the film tearing is smoother.

[0048] In a further embodiment, a material loading and unloading clamping unit 7 is further included, and the material loading and unloading clamping unit 7 is used to clamp and release the isolation membrane body 2;

[0049] It should be noted that the structure of the loading and unloading clamping unit 7 is the same as that of the film tearing mechanism 3. In this way, the same structure is adopted at two locations of the same device, and the accessories between the two structures can be replaced with each other, making subsequent maintenance and accessory replacement more convenient.

[0050] The loading and unloading clamping unit 7 needs to change its position when clamping the isolation membrane body 2, that is, when the isolation membrane body 2 is loaded, the adsorption position needs to be above the glue connection between the release film 202 and the middle layer 201, so that the entire isolation membrane body 2 can be driven to move, and when the isolation membrane body 2 is unloaded, it needs to adsorb the positions of the easy-to-tear parts 203 in the release film 202 on both sides of the middle layer 201 corresponding to the middle layer 201, so as to avoid damaging the glue in the middle layer 201, and the position of the suction cup 301 in the film tearing mechanism 3 can be adjusted as needed, so the position of the suction cup 301 can be adjusted according to loading or unloading.

[0051] It should be noted that the loading and unloading clamping unit 7 is connected to the lifting module 8 for driving it to move up and down, and the lifting module 8 is connected to the transverse movement module 9 for driving it and the loading and unloading clamping unit 7 to move. The lifting module 8 can drive the loading and unloading clamping unit 7 to move up and down, and the transverse movement module 9 can drive it to move left and right. The two cooperate with each other to realize the loading and unloading work of the isolation membrane body 2.

[0052] Working principle:

[0053] Place the isolation film body 2 on the workbench 1, and align the two sets of suction cups 301 in the film tearing mechanism 3 with the two easy-tear portions 203 in the release film 202 respectively;

[0054] After the two groups of suction cups 301 in the film tearing mechanism 3 are respectively connected to the two easy-to-tear parts 203, the lifting mechanism 4 first drives it to move upward for a distance. At this time, the two film pressing mechanisms 6 are started, and the angle adjustment motor 603 therein drives the film pressing roller 601 to rotate, so that the film pressing roller 601 rotates to the film pressing state. At this time, the film pressing roller 601 is against the position of the easy-to-tear part 203 in the release film 202 of the middle layer 201, pressing both sides of the middle layer 201. In this way, the lifting mechanism 4 drives the film tearing mechanism 3 to continue to move upward, which can separate the release film 202 from the middle layer 201. During the process, the squeezing of the film pressing roller 601 can prevent the middle layer 201 from being lifted up, and the middle layer 201 after tearing can be neatly arranged on the workbench 1.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A cell separator tearing structure, comprising a workbench (1), characterized in that: The workbench (1) is provided with a film-tearing mechanism (3), the isolation film body (2) comprises an intermediate layer (201) and release films (202) on both sides, and both ends of the release films (202) are provided with easy-tear portions (203), and the film-tearing mechanism (3) is used to absorb and release the easy-tear portions (203) of the release films (202); The film tearing mechanism (3) comprises a suction cup (301), the suction cup (301) is connected to an air pump (302), and two groups of suction cups (301) are provided, and the two groups of suction cups (301) are respectively directed towards the two easy-tear portions (203) of the release film (202); The air pump (302) is arranged on a mounting plate (303), and the mounting plate (303) is connected to the lifting plate; The film tearing mechanism (3) is connected to a lifting mechanism (4) for driving the film tearing mechanism to move up and down; Two film pressing mechanisms (6) are installed on the workbench (1). The film pressing mechanism (6) includes a film pressing roller (601). The film pressing roller (601) has at least two states including a film pressing state and a separation state. In the film pressing state, the film pressing roller (601) rests on the upper side of the isolation film body (2).

2. A cell separator tearing structure according to claim 1, characterized in that: Two sliders (304) symmetrically distributed about the center line of the mounting plate (303) are mounted on the mounting plate (303). The two sliders (304) are respectively mounted on two guide rails (305). The guide rails (305) are connected to the lifting plate via pins.

3. A cell separator tearing structure according to claim 2, characterized in that: A threaded sleeve (306) is installed on the lower side of the mounting plate (303), and the threaded sleeve (306) is connected to a lead screw (307). The threaded rotation directions of the lead screw (307) at the positions corresponding to the two threaded sleeves (306) are opposite, and the lead screw (307) is connected to the output shaft of the drive motor (308) through a gear set, and the drive motor (308) is connected to the lifting plate through a motor bracket.

4. The cell separator tearing structure according to claim 1, characterized in that: A lifting guide unit (5) is installed between the lifting plate and the workbench (1), and the lifting guide unit (5) comprises a guide tube (501) and a guide rod (502), wherein the guide tube (501) is installed on the workbench (1), and the guide rod (502) is installed on the lifting plate, and the guide tube (501) and the guide rod (502) are plugged into each other.

5. The battery cell separator tearing structure according to claim 1, characterized in that: The film pressing mechanism (6) comprises a film pressing roller (601), and both ends of the film pressing roller (601) are respectively inserted into two connecting plates (602).

6. A cell separator tearing structure according to claim 5, characterized in that: The connecting plate (602) is connected to the supporting base (604), and the connecting plate (602) is connected to the angle adjustment motor (603) for driving the forward and reverse rotation thereof.

7. A cell separator tearing structure according to claim 6, characterized in that: The support seat (604) in one of the film pressing mechanisms (6) is installed on a driving member (605), and the driving member (605) is connected to a driving track (606) on the workbench (1). The driving member (605) is used to drive the support seat (604) and the film pressing roller (601) to move back and forth in a direction parallel to the isolation film body (2), and the direction of movement of the driving member (605) is perpendicular to the direction of movement of the transverse movement module (9).

8. The battery cell separator tearing structure according to claim 1, characterized in that: The invention also includes a material loading and unloading clamping unit (7), which is used to clamp and release the isolation membrane body (2). The material loading and unloading clamping unit (7) is connected to a lifting module (8) for driving it to move up and down, and the lifting module (8) is connected to a transverse movement module (9) for driving it and the material loading and unloading clamping unit (7) to move.

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