Pole piece separation device, lamination manipulator and lamination machine

Abstract

The utility model relates to the technical field of battery processing, in particular to a pole piece separation device, a lamination manipulator and a lamination stacker, the pole piece separation device comprises a base, a negative pressure assembly and an ultrasonic generator, and the negative pressure assembly is arranged on the base and can adsorb pole pieces through negative pressure; the ultrasonic generator is arranged on the base and enables the pole piece to generate mechanical vibration by generating ultrasonic waves. The negative pressure assembly is combined with the ultrasonic generator, after the negative pressure assembly adsorbs the pole piece on the upper layer, under the effect of ultrasonic waves, mechanical vibration generated by the pole piece can break the micro-vacuum negative pressure acting force between the currently adsorbed pole piece and the lower pole piece, so that the lower pole piece is automatically separated from the currently adsorbed pole piece, and therefore the pole piece on the upper layer is automatically separated from the pole piece on the lower layer. And therefore, a plurality of pole pieces are prevented from being adsorbed at one time. And meanwhile, energy transmitted by the ultrasonic waves can clean the surface of the pole piece, so that attachments on the surface of the pole piece and the cutting edge are effectively removed.

Description

Technical Field

[0001] The present application relates to the field of battery processing technology, and in particular to a pole piece separation device, a lamination robot and a lamination machine. Background Art

[0002] Currently, the main production processes for prismatic lithium-ion batteries are winding and lamination. Winding involves cutting the positive and negative electrode sheets to a fixed length and then rolling the positive, negative, and separator sheets together into a battery cell using a winding needle. Lamination involves die-cutting the positive and negative electrode sheets into sheets of a predetermined size. A lamination machine then grabs the positive, separator, and negative electrode sheets, stacking them, and packaging them into a single electrode group. A single battery cell can consist of multiple electrode groups.

[0003] At present, in the lamination process, since the materials used for lamination are neatly placed in the magazine box, the negative pressure suction nozzle of the robot arm is used to absorb and transfer the electrodes during lamination. The electrodes in the magazine are pressed tightly by gravity. When the negative pressure suction nozzle of the robot arm absorbs the uppermost electrode, the lower electrode will be sucked together due to the micro-vacuum negative pressure between the electrodes, resulting in the absorption of multiple electrodes at one time. In order to solve the problem of multiple electrodes, the lamination equipment introduces an edge blowing device to blow air to the edge of the electrode to blow up the electrode in advance, breaking the micro-vacuum negative pressure absorption effect between the electrodes. The lamination robot arm can absorb the uppermost electrode without absorbing multiple electrodes. However, the introduction of the edge blowing device will bring other problems: First, due to the blowing of air to the electrode, Blowing foreign matter such as powder particles on the edge of the electrode into the electrode greatly increases the risk of introducing foreign matter and causing short circuit; second, during the stacking operation, the air pressure is unstable due to the fluctuations in the factory air pressure and gas consumption. The electrode is relatively fragile, and a strong blowing air volume will cause the electrode to be blown, wrinkled, cracked, and shifted; third, using positive pressure to break the vacuum backblowing, the electrode is not completely flat during the process of negative pressure adsorption and transfer to stacking. Adding positive pressure to break the vacuum backblowing will exert force on the electrode, and the electrode is relatively easy to shift. The tolerance requirement for alignment itself is relatively small, and poor alignment problems occur frequently; fourth, due to the frequent switching between negative and positive pressure, the equipment gas structure is more complex, the equipment failure rate is higher, and production capacity is affected. Utility Model Content

[0004] The present application provides a pole piece separation device, a lamination robot and a lamination machine, which are used to solve the problem in the prior art that blowing air into the pole piece may blow foreign matter such as powder particles on the edge of the pole piece into the pole piece, causing a short circuit.

[0005] In one aspect, the present application provides a pole piece separation device, comprising:

[0006] base;

[0007] The negative pressure component is arranged on the base and can absorb the electrode through negative pressure;

[0008] The ultrasonic generator is arranged on the base and generates ultrasonic waves to make the pole piece vibrate mechanically.

[0009] In a possible design, the base has a cavity, and the negative pressure component and the ultrasonic generator are respectively arranged in the cavity.

[0010] In one possible design, the ultrasonic generator is contact-connected to the vacuum component.

[0011] In a possible design, the negative pressure component includes at least one vacuum nozzle, and the suction surfaces of all the vacuum nozzles are flush and located outside the chamber.

[0012] In one possible design, the negative pressure component also includes a negative pressure pipeline, which is arranged in the chamber, one end of the negative pressure pipeline is connected to the vacuum nozzle, and the other end is connected to the negative pressure equipment, and the negative pressure pipeline is in contact with the ultrasonic generator.

[0013] In a possible design, the vacuum nozzle is a soft nozzle.

[0014] In a possible design, the pole piece separation device further includes a displacement sensor, which is used to detect the distance between the vacuum nozzle and the pole piece.

[0015] In one possible design, the ultrasonic generator includes an oscillator, a power amplifier, and a transducer electrically connected in sequence.

[0016] On the other hand, the present application also provides a lamination robot comprising the pole piece separation device as described above.

[0017] On the other hand, the present application also provides a stacking machine, including the stacking robot as described above.

[0018] The beneficial effects of this application are as follows:

[0019] The electrode separation device of the present application includes a base, a negative pressure component and an ultrasonic generator. The negative pressure component can absorb the electrode by using negative pressure, and the ultrasonic generator can generate ultrasonic waves to cause the electrode to vibrate mechanically. The present application combines the negative pressure component with the ultrasonic generator and applies it to the lamination process. After the negative pressure component absorbs the upper electrode, the mechanical vibration generated by the electrode under the action of ultrasonic waves will break the micro-vacuum negative pressure force between the currently absorbed electrode and the lower electrode, so that the lower electrode will automatically separate from the currently absorbed electrode and will not follow the electrode currently absorbed by the negative pressure nozzle, thus avoiding the absorption of multiple electrode pieces at one time. At the same time, the energy transmitted by the ultrasonic wave will clean the surface of the electrode, remove the attachments on the surface of the electrode and the cutting edge, effectively reduce the dust and foreign matter on the surface of the electrode, and ensure product quality.

[0020] The lamination robot provided in the present application includes the pole piece separation device in the present application, and therefore also includes all the above-mentioned advantages of the pole piece separation device.

[0021] The stacking machine provided in the present application includes the stacking robot in the present application, and therefore also includes all the above-mentioned advantages of the stacking robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 It is a structural diagram of a pole piece separation device in the prior art;

[0024] Figure 2 A schematic structural diagram of a pole piece separation device provided in an embodiment of the present application;

[0025] Figure 3 This is a bottom view of the pole piece separation device provided in an embodiment of the present application.

[0026] Reference numerals:

[0027] 100. Base; 110. Chamber; 200. Negative pressure assembly; 210. Vacuum nozzle; 220. Negative pressure pipeline; 300. Ultrasonic generator; 400. Displacement sensor; 500. Clip; 600. Blowing device. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] As in the background technology, the pole pieces that have been die-cut in the previous process are neatly placed in the clip 500. Figure 1As shown, when the electrodes are stacked together for a long time, the gaps between the electrodes are compressed, gradually forming a micro-vacuum negative pressure force. When the robot grabs the top electrode, the negative pressure force will lift the lower electrode, resulting in the adsorption of multiple electrodes at a time. In order to solve the problem of multiple electrodes, a blowing device 600 is installed on the side of the magazine 500. The purpose is to use airflow to break the micro-vacuum negative pressure force and separate the two adjacent electrode sheets. Although this method can separate the electrode sheets, blowing air into the electrode sheets will not only introduce foreign matter, but also frequently adjust the air pressure due to unstable air pressure. When the air pressure suddenly increases, the electrode sheets will be blown apart.

[0030] In order to solve the above problems, an electrode separation device is provided in an embodiment of the present application.

[0031] Reference Figure 2 、 Figure 3 As shown, the electrode separation device provided in the embodiment of the present application includes a base 100, a negative pressure component 200 and an ultrasonic generator 300. The negative pressure component 200 is arranged on the base 100 and can adsorb the electrode through negative pressure; the ultrasonic generator 300 is arranged on the base 100, and the ultrasonic generator 300 generates ultrasonic waves to cause the electrode to vibrate mechanically. In some specific embodiments, the ultrasonic generator 300 includes an oscillator, a power amplifier and a transducer electrically connected in sequence. The oscillator is used to generate a high-frequency oscillation signal, the frequency of which is usually above 20kHz and falls within the ultrasonic range; the power amplifier amplifies the weak signal generated by the oscillator so that it has sufficient power to drive the transducer; the transducer converts the electrical signal into mechanical vibration, that is, converts electrical energy into sound energy, thereby generating ultrasonic waves.

[0032] By combining the negative pressure assembly 200 with the ultrasonic generator 300 and applying it to the lamination process, the negative pressure assembly 200 absorbs the upper electrode sheet. Under the action of ultrasonic waves, the mechanical vibrations generated by the electrode sheet break the micro-vacuum negative pressure force between the currently absorbed electrode sheet and the lower electrode sheet, causing the lower electrode sheet to automatically separate from the currently absorbed electrode sheet. The lower electrode sheet will not follow the electrode sheet currently absorbed by the negative pressure nozzle, thus avoiding the absorption of multiple electrode sheets at a time. At the same time, the energy transmitted by the ultrasonic waves cleans the surface of the electrode sheet, removing attachments on the electrode sheet surface and cutting edges, effectively reducing dust and foreign matter on the electrode sheet surface and ensuring product quality.

[0033] Reference Figure 2As shown, in some embodiments provided herein, the base 100 has a chamber 110, and the negative pressure assembly 200 and the ultrasonic generator 300 are respectively disposed in the chamber 110. Since the intensity of ultrasonic waves gradually weakens and the energy is gradually consumed as the propagation distance increases when ultrasonic waves propagate through various media, by disposing the negative pressure assembly 200 and the ultrasonic generator 300 in the chamber 110, the energy loss of ultrasonic waves during propagation can be reduced.

[0034] Reference Figure 3 As shown, in some embodiments provided herein, the ultrasonic generator 300 is in contact with the negative pressure assembly 200. By making the ultrasonic generator 300 and the negative pressure assembly 200 contact each other, on the one hand, the loss of energy propagating in the medium is reduced, and on the other hand, it is also beneficial to reduce the power of the ultrasonic generator 300, which is more energy-efficient.

[0035] Reference Figure 2 As shown, in some embodiments provided herein, the negative pressure assembly 200 includes at least one vacuum nozzle 210, and the suction surfaces of all vacuum nozzles 210 are flush and located outside the chamber 110. In some specific embodiments, the base 100 is a rectangular shell with a through hole formed on the lower end surface of the base 100. A vacuum nozzle 210 is disposed at each through hole. For example, six through holes are formed on the lower end surface of the base 100, and there are six vacuum nozzles 210. The lower end surfaces of the six vacuum nozzles 210 serve as suction surfaces, and the suction surfaces of the six vacuum nozzles 210 are flush. As the base 100 moves downward, the suction surfaces of the vacuum nozzles 210 gradually approach the electrode pieces. Under the action of negative pressure, the topmost electrode piece is sucked onto the suction surfaces of the vacuum nozzles 210. In some specific embodiments, the vacuum nozzles 210 are soft, such as rubber nozzles. This prevents accidental damage to the electrode pieces during contact between the vacuum nozzles 210 and the electrode pieces. In some specific embodiments, the negative pressure assembly 200 further includes a negative pressure line 220, which is disposed within the chamber 110. One end of the negative pressure line 220 is in communication with the vacuum nozzle 210, and the other end of the negative pressure line 220 is in communication with the negative pressure device. The negative pressure line 220 is in contact with the ultrasonic generator 300. By ensuring that the negative pressure line 220 is in contact with the ultrasonic generator 300, the energy loss during the propagation of the ultrasonic wave can be reduced.

[0036] Reference Figure 2As shown, in some embodiments provided herein, the electrode piece separation device further includes a displacement sensor 400, which is signal-connected to the ultrasonic generator 300. The displacement sensor 400 is used to detect the distance between the vacuum nozzle 210 and the electrode piece. Specifically, when the displacement sensor 400 detects that the distance between the vacuum nozzle 210 and the electrode piece is less than a certain distance, it sends a signal to the ultrasonic generator 300. Upon receiving the signal, the ultrasonic generator 300 immediately emits an ultrasonic wave. In this way, the ultrasonic wave is transmitted to the topmost electrode piece, thereby breaking the micro-vacuum negative pressure between the currently adsorbed electrode piece and the lower electrode piece, causing the lower electrode piece to automatically separate from the currently adsorbed electrode piece, effectively avoiding the phenomenon of multiple electrodes.

[0037] The working process of the pole piece separation device of this application is as follows:

[0038] The electrode separation device of the present application is installed at the end of the robotic arm. After the lamination machine is started, the electrode separation device is driven by the robotic arm and moves to the top of the clip 500 according to the set route, and then moves downward to absorb the electrode.

[0039] When the displacement sensor 400 detects that the distance between the vacuum nozzle 210 and the pole piece is less than a certain distance, it sends a signal to the ultrasonic generator 300. After receiving the signal, the ultrasonic generator 300 immediately emits an ultrasonic wave.

[0040] The ultrasonic wave is turned on, and the vacuum nozzle 210 uses negative pressure to absorb the electrode after contacting the electrode. The ultrasonic wave breaks the micro-vacuum negative pressure between the currently absorbed electrode and the lower electrode, and the lower electrode is automatically separated from the currently absorbed electrode. The vacuum nozzle 210 successfully absorbs the uppermost electrode.

[0041] The robotic arm drives the electrode to move upward and to the predetermined position according to the set route. During this process, the energy transmitted by the ultrasonic wave will clean the surface of the electrode and remove the attachments on the surface of the electrode and the cutting edge.

[0042] When the robotic arm drives the pole piece to move to a predetermined position, the ultrasonic generator 300 stops ultrasonic waves.

[0043] The beneficial effects of the pole piece separation device of the present application are as follows:

[0044] 1. The ultrasonic vibration transfer energy replaces the edge blowing to break the micro vacuum negative pressure between the pole pieces, thus eliminating the introduction of foreign matter around the pole pieces from the root;

[0045] 2. The vibration of the ultrasonic generator 300 is transmitted to the electrode through the vacuum nozzle 210, driving the electrode to vibrate, which can clean the electrode. The residual material residue and foreign matter adhering to the cutting edge of the electrode will fall off with the vibration of the electrode.

[0046] 3. Ultrasonic technology is used to break the micro-vacuum negative pressure between the electrodes. Compared with the prior art method of breaking the vacuum by means of a blowing device 600, this can greatly simplify the device structure.

[0047] 4. Using ultrasonic technology to break the micro vacuum negative pressure between the electrodes can prevent the electrodes from being blown, wrinkled, cracked, or offset under the action of positive and negative pressures.

[0048] 5. After the vacuum backflush is cancelled, the position of the pole piece is not easily offset and the alignment of the pole piece is higher;

[0049] 6. The overall efficiency of lamination will be improved, the failure rate of equipment will be reduced, frequent debugging will not be required, the consistency of products will be improved, and product quality will be guaranteed.

[0050] An embodiment of the present application also provides a lamination robot, which includes the pole piece separation device in the above embodiment.

[0051] It should be noted that the lamination robot includes a pole piece separation device, which also includes all the advantages of the pole piece separation device mentioned above, which will not be repeated here.

[0052] An embodiment of the present application also provides a laminating machine, comprising the laminating robot in the above embodiment.

[0053] It should be noted that the stacking machine includes a stacking robot, which also includes all the advantages of the stacking robot mentioned above, which will not be repeated here.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0056] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0057] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A pole piece separation device, characterized in that: include: base; A negative pressure component is provided on the base and can absorb the electrode by negative pressure; The ultrasonic generator is arranged on the base and generates ultrasonic waves to cause the pole piece to vibrate mechanically.

2. The pole piece separation device according to claim 1, characterized in that: The base has a cavity, and the negative pressure component and the ultrasonic generator are respectively arranged in the cavity.

3. The pole piece separation device according to claim 1, characterized in that: The ultrasonic generator is in contact with the negative pressure component.

4. The pole piece separation device according to any one of claims 1 to 3, characterized in that: The negative pressure component includes at least one vacuum suction nozzle, and the suction surfaces of all the vacuum suction nozzles are flush, and the suction surfaces are located outside the chamber.

5. The pole piece separation device according to claim 4, characterized in that: The negative pressure component also includes a negative pressure pipeline, which is arranged in the chamber. One end of the negative pressure pipeline is connected to the vacuum nozzle, and the other end is connected to the negative pressure equipment. The negative pressure pipeline is in contact with the ultrasonic generator.

6. The pole piece separation device according to claim 4, characterized in that: The vacuum suction nozzle is a soft suction nozzle.

7. The pole piece separation device according to claim 4, characterized in that: It also includes a displacement sensor, which is used to detect the distance between the vacuum nozzle and the pole piece.

8. The pole piece separation device according to any one of claims 1 to 3, characterized in that: The ultrasonic generator includes an oscillator, a power amplifier and a transducer which are electrically connected in sequence.

9. A lamination robot, characterized in that: It comprises the pole piece separation device according to any one of claims 1 to 8.

10. A laminating machine, characterized in that: Including the lamination robot described in claim 9.

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