A battery cell film tearing mechanism

Abstract

The utility model provides a battery cell film-tearing mechanism, which relates to the technical field of battery production, and comprises a tray for accommodating battery cells arranged linearly, and also comprises an air blowing device, which can move along the linear direction of the battery cells and move relative to the tray, the air blowing port of the air blowing device faces the edge of the film at the top of the battery cells, and the wind-receiving part of the film is lifted up; and a film-tearing member, which is provided with an adsorption member with a negative pressure inside, the negative pressure end of the adsorption member adsorbs the film lifted up by the battery cell part, and the adsorption member can move relative to the battery cell; the air is blown on the protective blue film of the battery cell by the air blowing device, a sensor senses the height to which the release paper of the protective blue film on the surface of the battery cell is blown up, the lifted protective blue film is adsorbed and torn by the adsorption member and a movable frame, the adsorption member does not need to be in contact with the battery cell, and the problem of deformation and damage of the battery cell caused by the film-tearing process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a battery core film tearing mechanism. Background Art

[0002] The cell film peeling device is a device used in battery production, mainly used to peel off the protective film or packaging film on the outside of the battery cell. During the battery production process, the battery cell is usually wrapped in a layer of protective film or packaging film. These films need to be peeled off during the assembly process to expose the surface of the battery cell. The cell film peeling device can automatically or semi-automatically peel off these films, improving production efficiency and ensuring battery quality.

[0003] At present, manual film tearing is more common, and there are also methods of using clamps to clamp the release film outside the blue film and tear it off. Using clamps to remove the release film outside the blue film may result in poor appearance. The specific reasons are as follows:

[0004] Patent No. CN218343931U discloses a film-tearing mechanism comprising a shaving member, a film-blowing member, a first clamping member, and a second clamping member. The shaving member contacts the edge of the film sheet to shave it. The film-blowing member delivers air to blow the shaved edge of the film, separating it from the substrate at the shaved point. The movable clamping members move toward each other, abutting against each other to clamp the blown film.

[0005] The above patent still has some shortcomings. Since the surface appearance of the battery cell is required to be high, the clamping part is very likely to cause friction or collision with the surface of the battery cell during the process of clamping the blue film. The battery cell is easily deformed by the hard contact of the clamping part, resulting in poor appearance. If the contact force is too great, there is also a risk of leakage. Utility Model Content

[0006] In order to solve the above technical problems, the utility model uses a blowing device to blow air to lift the protective blue film of the battery cell, and the adsorption member absorbs the lifted blue film release paper and then tears it off. The specific technical solution is as follows:

[0007] A battery cell film-tearing mechanism comprises a tray for accommodating linearly arranged battery cells, a blowing device capable of moving along the linear direction of the battery cells and relative to the tray, with the blowing port of the blowing device facing the edge of the film at the top of the battery cells, and the film being partially lifted by the wind; and a film-tearing member, which is provided with an adsorption member with a built-in negative pressure, the negative pressure end of the adsorption member adsorbing the partially lifted film of the battery cells, and the adsorption member being capable of moving relative to the battery cells.

[0008] The above-mentioned battery cell is located on the tray, and the battery cell and the film on the surface of the battery cell are driven by the tray to move the blowing device in turn. The blowing device blows the handle of the protective blue film release paper in turn, so that the film handle is lifted by the wind until the film handle is blown up to the negative pressure port of the adsorption component. The adsorption component adsorbs the handle and drives the battery cell film to move back and forth, so that the protective blue film release paper on the surface of the battery cell can be easily peeled off. During the whole process, there is no need for the adsorption component to contact the battery cell protective blue film release paper, and the film peeling operation can be achieved without contact, avoiding the problem of battery cell deformation and damage caused by the film peeling process.

[0009] Preferably, the tray further comprises a receiving plate, a bracket is mounted on the top of the receiving plate, and a plurality of battery cells are arranged on the top of the bracket. The tray can accommodate multiple battery cells, so that when the tray is subsequently used to drive the battery cells to tear the film, the film can be peeled off one by one, thereby accelerating the efficiency of the film peeling.

[0010] Preferably, the receiving plate is provided with a slide groove, and the blowing device moves relative to the plurality of battery cells through the slide groove. The blowing device can be arranged below the battery cells to facilitate blowing up the battery cell membrane handle while avoiding interference with the movement of the tray.

[0011] Preferably, a guide platform is further included, the guide platform comprising a workbench and a guide rail mounted on the top of the workbench, the tray being slidably connected to the guide rail, and the blowing device being mounted on the top surface of the workbench. The installation of the blowing device on the workbench facilitates the fixing of the position of the blowing device, increases the stability of the wind force when the blowing device is in operation, and also ensures that the position of the battery cell membrane is fixed, facilitating the sensor to detect the height of the battery cell membrane.

[0012] Preferably, the film tearing unit further comprises a movable frame mounted on top of the workbench, the movable frame being fixed to the positive pressure end of the adsorbent and being movable along a direction perpendicular to the movement of the tray. The movable frame can drive the adsorbent to move back and forth, thereby driving the adsorbent and a portion of the film handle at the negative pressure end of the adsorbent to move, thereby achieving the film tearing operation.

[0013] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0014] This utility model utilizes a blowing device located below the battery cell protective film to blow air against the protective blue film on the battery cell. A sensor senses the height to which the protective blue film release paper on the battery cell surface is blown up. When the height reaches a preset value in the signal control system, the signal controller controls the movable frame and drives the suction element to tear off the blue film release paper on the battery cell surface. The suction element absorbs and tears the lifted protective blue film without requiring contact with the battery cell. The suction element's silicone design effectively protects the battery cell surface, preventing deformation and damage to the battery cell during the film tearing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the tray of the utility model;

[0017] Figure 3 It is a structural diagram of the working state of the utility model.

[0018] In the figure: 10, guide table; 101, workbench; 102, guide rail; 20, tray; 201, receiving plate; 202, slide; 203, blowing device; 204, bracket; 30, sensor; 40, film tearing part; 401, adsorption part; 402, movable rack; 50, battery cell. DETAILED DESCRIPTION

[0019] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. Before describing in detail the technical solutions of each embodiment of the present invention, the nouns and terms involved are explained. In this specification, components with the same name or the same number represent similar or identical structures and are for illustrative purposes only.

[0020] During the packing process, lithium-ion batteries need to be attached with a layer of blue film to protect the batteries to prevent damage or static electricity generated by friction during the assembly process. Therefore, after attaching the blue film, there is a process of tearing off the release paper on the surface of the blue film. In the past, manual tearing was used, which was inefficient and the process was uncontrollable. In addition, a clamping method was used to clamp the release film, but since the clamping material is often metal, it is easy to touch the surface of the battery cell and cause surface pits and other defects. Therefore, this experiment uses a new method of using an adsorption part to tear off the release paper of the blue film protecting the battery cell surface.

[0021] like Figure 1 and Figure 2As shown, a battery cell film tearing mechanism includes a tray 20 for accommodating linearly arranged battery cells 50, and also includes a blowing device 203, which can move along the linear direction of the battery cells 50 and move relative to the tray 20, and the blowing port of the blowing device 203 is toward the edge of the film at the top of the battery cell 50, and the film is partially lifted by the wind; and a film tearing member 40, which is provided with an adsorption member 401 with a built-in negative pressure, and the negative pressure end of the adsorption member 401 adsorbs the partially lifted film of the battery cell 50, and the adsorption member 401 can move relative to the battery cell 50, wherein the battery cell 50 is arranged on the tray 20 in a linear arrangement, and the battery cell 50 can be set up in multiple columns as needed, preferably two columns are used, and the blowing device 203 is set according to the number of columns of the battery cells 50, that is, a blowing device 203 is set in each column, and the blowing port of the blowing device 203 is directed toward the handle of the membrane at the top of the battery cell 50, that is, the blowing device 203 is located below the battery cell 50, and the wind blown by the blowing device 203 blows the handle of the membrane of the battery cell 50, so that the handle of the membrane is gradually lifted up due to the wind force. When the handle of the membrane of the battery cell 50 is lifted up, one end of the adsorption component 401 adsorbs the lifted part of the membrane of the battery cell 50 through negative pressure, and realizes the film tearing operation through the relative movement of the adsorption component 401 and the battery cell 50.

[0022] Furthermore, the film of the battery cell 50 is a protective blue film release paper, and the blowing device 203 preferably uses plasma wind blowing, which can also remove the release paper and eliminate static electricity. The film handle is the part that leaks out from the side of the battery cell 50. The leaked part can be set as needed. The film handle of this application leaks out at both ends of the battery cell 50. The blowing port of the blowing device 203 is facing the film handle, which is convenient for lifting the film handle. The adsorption component 401 is preferably made of silicone material, which is an insulator and easy to adsorb thin films. At the same time, the adsorption component 401 does not need to contact the battery cell 50, and can adsorb the thin film to realize the film tearing operation, thereby avoiding the battery cell 50 from being easily deformed by hard contact, causing poor appearance, and reducing the risk of leakage. The relative movement of the adsorption component 401 and the battery cell 50 can be that the adsorption component 401 moves while the battery cell 50 is fixed; or the adsorption component 401 is fixed and the battery cell 50 moves.

[0023] like Figure 1 and Figure 2 As shown, the tray 20 also includes a receiving plate 201, which is in the shape of a plate. A bracket 204 is installed on the top of the receiving plate 201, and multiple battery cells 50 are arranged on the top of the bracket 204. A slide groove 202 is provided on the receiving plate 201, and the blowing device 203 moves relative to the multiple battery cells 50 through the slide groove 202, wherein one end of the slide groove 202 of the receiving plate 201 is open, and the blowing of the blowing device 203 is inclined toward the direction of the membrane handle of the battery cell 50. The bracket 204 is preferably arranged in two rows, and the battery cell 50 is stuck in the groove provided by the bracket 204 to limit the battery cell 50.

[0024] The battery cell film tearing mechanism also includes a guide platform 10, which includes a workbench 101 and a guide rail 102 installed at the top of the workbench 101. The tray 20 is slidably connected to the guide rail 102, and the blowing device 203 is installed on the top surface of the workbench 101, wherein the blowing device 203 is installed on the workbench 101 and extends to the battery cell 50 film handle through the slide groove 202. The receiving plate 201 in the tray 20 slides with the guide rail 102, and the receiving plate 201 drives the battery cell 50 to move relative to each other through the bracket 204. Since the blowing device 203 is fixed to the workbench 101, when the receiving plate 201 drives the battery cell 50 to slide along the guide rail 102, the blowing device 203 gradually blows air to different battery cell 50 film handles in turn along the linear direction of the battery cell 50, so that the battery cell 50 film moved to the blowing device 203 is lifted up, so that the negative pressure end of the adsorption component 401 can adsorb the lifted film handle.

[0025] like Figure 1-Figure 3 As shown, the film tearing member 40 also includes a movable frame 402 installed on the top of the workbench 101, the movable frame 402 is fixed to the positive pressure end of the adsorption member 401, and the movable frame 402 can move along the vertical direction of the movement of the tray 20. The connection between the adsorption member 401 and the movable frame 402 can be rotated and adjusted, wherein the movable frame 402 is installed on the bracket at the top of the workbench 101, and the movable frame 402 can move along the bracket. The movable frame 402 is controlled by a stepper motor or a servo motor, and a vacuum pump is also provided on the movable frame 402 to provide negative pressure for the adsorption member 401. The movable frame 402 is used to drive the adsorption part 401 to move to different columns of battery cells 50. To ensure the adsorption effect of the adsorption part 401 and the lifted film handle, the adsorption part 401 can be rotated and adjusted with the movable frame 402. The negative pressure end of the adjusted adsorption part 401 is adsorbed on the back side of the film handle exposed to the wind. To further improve the film-tearing effect of the adsorption part 401 on the battery cell 50, the film handle needs to be torn along the linear direction of the battery cell 50. When the adsorption part 401 adsorbs the film handle, the receiving plate 201 realizes the film-tearing effect of the adsorption part 401 through the movement of the guide rail 102.

[0026] Among them, the adsorption component 401 adopts one of a suction nozzle and a negative pressure tube, or a combination of the two, so that the negative pressure end of the suction nozzle or the negative pressure end of the negative pressure tube is facing the part of the battery cell 50 membrane that is lifted up. If a suction nozzle is used, the suction nozzle is sleeved on the negative pressure port of the movable frame 402, and the suction nozzle is at the height at which the battery cell 50 membrane is lifted up. If a negative pressure tube is used, the negative pressure tube is sleeved on the negative pressure port of the movable frame 402, and the other end of the negative pressure tube is facing the height at which the battery cell 50 membrane is lifted up. The combination of the suction nozzle and the negative pressure tube is preferred. After the combination, the suction nozzle adsorbs the battery cell 50 membrane, and the negative pressure tube is fixed to the movable frame 402.

[0027] like Figure 1As shown, a sensor 30 is fixedly installed on the top surface of the workbench 101. The sensor 30 is used to capture the signal of the battery cell 50 film being lifted up. Among them, the sensor 30 can select an ultrasonic sensor, an infrared sensor, an electric field sensor or a radar sensor, etc. The sensor 30 includes a transmitter and a receiver. The sensor 30 is installed on both sides of the tray 20 through a bracket. The transmitter and receiver of the sensor 30 are used to detect the height to which the battery cell 50 film handle is lifted up by the wind. The sensor 30 is used to sense the height to which the protective blue film is blown up. The sensor 30 sends a signal to the signal control system. The signal control system moves to the corresponding battery cell 50 through the movable frame 402 according to the feedback from the sensor 30, and controls the adsorption component 401 to absorb the lifted protective blue film. If the sensor 30 does not sense the preset height, the signal control system will make an NG judgment on the battery cell 50, which requires manual identification.

[0028] When there are multiple columns of battery cells 50, in order to avoid affecting the height detection of multiple battery cells 50 between the transmitter and the receiver, when the adsorption component 401 tears the film, the blowing device 203 under each battery cell 50 between the transmitter and the receiver is turned on in turn, and the adsorption component 401 moves to the corresponding battery cell 50 through the movable frame 402, and only performs the film tearing operation on this battery cell 50. When the film tearing of the battery cell 50 between the transmitter and the receiver is completed, the receiving plate 201 moves through the guide rail 102, so that the next row of battery cells 50 is moved between the transmitter and the receiver, and can be used for the corresponding blowing device 203 to blow and lift the film.

[0029] During use, the blowing device 203 blows air to the protective blue film of the battery cell 50, and the sensor 30 senses the height to which the protective blue film release paper on the surface of the battery cell 50 is blown up. After the height value reaches the preset value of the signal control system, the signal controller controls the movable frame 402 and drives the adsorbent 401 to tear off the blue film release paper on the surface of the battery cell 50. After the adsorbent 401 adsorbs the protective blue film and tears it off from the battery cell 50, the movable frame 402 moves the adsorbed protective blue film to one side of the battery cell 50, interrupts the negative pressure of the adsorbent 401, drops the protective blue film, and then performs the film tearing operation on the remaining battery cells 50 again. This effectively solves the low efficiency problem of manual film tearing, and the adsorbent 401 adopts a silicone design to effectively protect the surface of the battery cell 50, avoiding the problem of damage to the battery cell 50 caused by the film tearing process.

[0030] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A battery cell film tearing mechanism, comprising a tray (20) for accommodating linearly arranged battery cells (50), characterized in that: It also includes a blowing device (203) that can move along the linear direction of the battery core (50) and move relative to the tray (20), the blowing port of the blowing device (203) facing the edge of the film at the top of the battery core (50), and the wind-receiving part of the film is lifted up; as well as The film tearing member (40) is provided with an adsorption member (401) with internal negative pressure, wherein the negative pressure end of the adsorption member (401) adsorbs the film partially lifted by the battery cell (50), and the adsorption member (401) can move relative to the battery cell (50).

2. The battery cell film tearing mechanism according to claim 1, characterized in that: The tray (20) further comprises a receiving plate (201), a bracket (204) being mounted on the top surface of the receiving plate (201), and a plurality of battery cells (50) being arranged on the top of the bracket (204).

3. The battery cell film tearing mechanism according to claim 2, characterized in that: The receiving plate (201) is provided with a slide groove (202), and the blowing device (203) moves relative to the plurality of battery cells (50) via the slide groove (202).

4. The battery cell film tearing mechanism according to claim 1, characterized in that: It also includes a guide platform (10), the guide platform (10) includes a workbench (101) and a guide rail (102) installed on the top of the workbench (101), the tray (20) is slidably connected to the guide rail (102), and the blowing device (203) is installed on the top surface of the workbench (101).

5. The battery cell film tearing mechanism according to claim 4, characterized in that: The film tearing member (40) further comprises a movable frame (402) mounted on the top of the workbench (101), wherein the movable frame (402) is fixed to the positive pressure end of the adsorption member (401), and the movable frame (402) can move along the vertical direction of movement of the tray (20).

6. The battery cell film tearing mechanism according to claim 4, characterized in that: A sensor (30) is fixedly mounted on the top surface of the workbench (101), and the sensor (30) is used to capture a signal indicating that a film of the battery cell (50) is lifted.

7. The battery cell film tearing mechanism according to claim 5, characterized in that: The connection between the adsorption member (401) and the movable frame (402) is rotatably adjustable.

8. The battery cell film tearing mechanism according to claim 5, characterized in that: The sensor (30) includes a pair of transmitters and receivers located on both sides of the tray (20).

9. The battery cell film tearing mechanism according to claim 1, characterized in that: The adsorption member (401) is a suction nozzle or a negative pressure tube.

10. The battery cell film tearing mechanism according to claim 1, characterized in that: The adsorption member (401) is a combination of a suction nozzle and a negative pressure tube.

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