Pole piece coating state early warning device

Abstract

The utility model discloses a pole piece coating state early warning device, which relates to the technical field of battery manufacturing, and comprises a mounting bracket and a jitter detection assembly, the jitter detection assembly is mounted on the mounting bracket, the jitter detection assembly comprises two detection units, the two detection units are arranged on the two sides of a pole piece in the thickness direction through the mounting bracket, and the two detection units are arranged on the mounting bracket. The device is used for detecting the displacement of the pole piece in the thickness direction. The shaking and the sinking amount of the pole piece in the thickness direction of the pole piece are detected through the shaking detection assembly, so that the wrinkling rate of the pole piece and the probability that a dispensing mutual dissolution area becomes larger are conveniently controlled, and the reject ratio of pole piece coating is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and in particular to a pole piece coating state early warning device. Background Art

[0002] As a new energy source, secondary batteries have the advantages of high voltage, high capacity, high specific energy, multiple charge and discharge cycles, no memory effect and long service life. They are widely used in people's daily life, such as mobile phones, laptops, digital cameras, electric vehicles, energy storage devices, etc. With the increase in applications, people have higher and higher requirements for the safety performance of secondary batteries.

[0003] The second step in secondary battery production is coating. The quality, accuracy and stability of coating are the key to ensuring the high quality of secondary battery electrodes.

[0004] On a single-layer coating machine, electrode wrinkling and miscible zone exceeding specifications are two abnormalities that are difficult to identify. Wrinkling usually occurs at the head and tail glue pressure rollers. After wrinkling, the electrode needs to be restored to normal flatness by loosening the glue pressure rollers, which lacks "predictability". The size of the miscible zone of the single-layer coating machine's dispensing glue is determined to a certain extent when the coating is applied at the head. As the electrode swings left and right, the "collision" and miscible degree of the dispensing glue and the slurry will change to a certain extent. Since the miscible zone is small, it is difficult to identify CCD (charge coupled device) imaging after baking in an oven. Therefore, since it is difficult to predict the increase or decrease of the miscible zone in the existing technology, it is impossible to guarantee the stability of the size of the miscible zone during the manufacturing process. Utility Model Content

[0005] In view of the defects existing in the prior art, the purpose of the utility model is to provide a pole piece coating status warning device to solve the problem in the prior art that it is difficult to predict the enlargement and reduction of the miscible zone, thereby failing to ensure the stability of the size of the miscible zone during the manufacturing process.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The present application provides a pole piece coating status early warning device, comprising:

[0008] Mounting bracket;

[0009] A jitter detection component, the jitter detection component is installed on the above-mentioned mounting bracket, and the jitter detection component includes two detection units, which are arranged on both sides of the pole piece in the thickness direction and are used to detect the displacement of the pole piece in its thickness direction.

[0010] In some optional embodiments, the mounting bracket includes two sub-mounting frames located on both sides of the pole piece in the width direction, and the vibration detection component is provided in two groups, which are respectively mounted on the two sub-mounting frames.

[0011] In some optional embodiments, the detection unit includes:

[0012] The displacement sensing end can be extended and retracted in the thickness direction of the pole piece;

[0013] The acquisition module is connected to the displacement sensing end signal and is used to acquire the displacement signal of the displacement sensing end.

[0014] In some optional embodiments, two groups of displacement detection components are further included, which are respectively installed on the two sub-mounting frames mentioned above, and are used to detect the displacement of the pole piece in its width direction.

[0015] In some optional embodiments, the above-mentioned offset detection component includes a laser transmitter and a laser receiver respectively arranged on both sides of the pole piece in the thickness direction, and the receiving end of the above-mentioned laser receiver is arranged opposite to and aligned with the transmitting end of the above-mentioned laser transmitter.

[0016] In some optional embodiments, the two sub-mounting frames mentioned above can be close to or far away from each other to adapt to pole pieces of different widths.

[0017] In some optional embodiments, the two sub-mounting frames are moved closer to or farther away from each other via a displacement driving member, and the displacement driving member includes:

[0018] A slide rail, which is slidably matched with the sub-mounting frame;

[0019] A driving motor, whose output end is connected to the sub-mounting frame, is used to drive the sub-mounting frame to slide on the slide rail.

[0020] In some optional embodiments, the sub-mounting frame is threadably matched with the output end of the driving motor so that when the output end of the driving motor rotates, the sub-mounting frame slides on the slide rail.

[0021] In some optional embodiments, the sub-mounting frame includes:

[0022] A connecting frame, one end of which is slidably engaged with the slide rail;

[0023] A U-shaped mounting frame is connected to the other end of the connecting frame, the pole piece portion is located in the opening of the U-shaped mounting frame, and the vibration detection component is installed on the U-shaped mounting frame.

[0024] In some optional embodiments, the above-mentioned jitter detection component can be moved along the width direction of the pole piece on the above-mentioned U-shaped mounting frame.

[0025] Compared with the prior art, the advantages of the utility model are:

[0026] The jitter detection component is used to detect the jitter and sagging of the electrode in its thickness direction, so as to control the wrinkling rate of the electrode and the probability of the increase of the dissolving zone of the glue, thereby reducing the defective rate of the electrode coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the electrode coating;

[0029] Figure 2 The figure is a structural schematic diagram of a pole piece coating status early warning device.

[0030] In the figure: 1. mounting bracket; 11. sub-mounting frame; 111. connecting frame; 112. U-shaped mounting frame; 12. displacement drive member; 121. slide rail; 122. drive motor; 2. jitter detection component; 21. detection unit; 3. offset detection component; 31. laser transmitter; 32. laser receiver; 4. pole piece; 5. coater roller; 6. die head. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] The following is a further detailed description of an embodiment of a pole piece coating status warning device of the utility model in conjunction with the accompanying drawings.

[0033] like Figure 1 As shown, when the pole piece 4 is being coated, it passes through a plurality of coating machine rollers 5 arranged at intervals to maintain a smooth belt running, and then the slurry and dispensing glue liquid are ejected through the die head 6 for coating.

[0034] Therefore, when the electrode piece 4 is running on the coating machine roller 5, if the electrode piece is offset, shaken or wrinkled, the relative position of the electrode piece 4 at the die head 6 will change, thereby affecting the miscible zone exceeding the specification.

[0035] Based on the above problems, the present application provides a device for early warning of electrode coating status, such as Figure 2 As shown, it includes a mounting bracket 1 and a jitter detection component 2, the jitter detection component 2 is mounted on the mounting bracket 1, and the jitter detection component 2 includes two detection units 21, and the two detection units 21 are arranged on both sides of the pole piece 4 in the thickness direction through the above-mentioned mounting bracket 1, and are used to detect the displacement of the pole piece 4 in its thickness direction.

[0036] It can be understood that when the pole piece 4 vibrates, the vibration detection component 2 detects the displacement of the pole piece 4 in its thickness direction. At this time, the vibration displacement of the pole piece 4 can be associated with the change of the dissolving zone of the glue. By controlling the vibration displacement and the amount of depression of the pole piece 4, the wrinkling rate of the pole piece and the probability of the dissolving zone of the glue becoming larger can be controlled.

[0037] In some optional embodiments, the above-mentioned electrode coating status warning device also includes an alarm system, which is connected to the signal of the vibration detection component 2 and is used to alarm when the vibration detection component 2 detects that the displacement of the electrode 4 in its thickness direction exceeds the warning value.

[0038] Of course, the alarm system can also be connected to the transmission device signal of the pole piece. When the jitter detection component 2 detects that the displacement of the pole piece 4 in its thickness direction exceeds the warning value, the pole piece 4 stops moving to facilitate personnel to adjust the die position or adjust the pole piece status.

[0039] In some optional embodiments, the mounting bracket 1 includes two sub-mounting frames 11 located on both sides of the pole piece 4 in the width direction, and the vibration detection component 2 is provided with two groups, which are respectively mounted on the two sub-mounting frames 11 .

[0040] That is to say, a group of jitter detection components 2 are provided on both sides of the pole piece 4 in the width direction. Since the tension and the sagging amount of the pole piece 4 in the width direction are not evenly distributed, in order to more accurately detect the displacement of the entire pole piece 4 in the thickness direction, two groups of jitter detection components 2 are set.

[0041] It is understandable that the relative position of the vibration detection assembly 2 with respect to the pole piece 4 can be adjusted accordingly according to the detection requirements. In this example, two groups of vibration detection assemblies 2 are located at the outer edge of the pole piece 4.

[0042] In some optional embodiments, the detection unit 21 includes a displacement sensing end and a collection module. The displacement sensing end can be extended and retracted in the thickness direction of the pole piece 4. The collection module is connected to the displacement sensing end signal and is used to collect the displacement signal of the displacement sensing end.

[0043] In this example, the two detection units 21 are both telescopic cylinders, which are relatively arranged on both sides of the thickness direction of the pole piece 4. The fixed end of the telescopic cylinder is connected to the sub-mounting frame 11, and the displacement sensing ends extend toward each other and are separated by a first set distance, so that the pole piece 4 is located in the gap between the two displacement sensing ends. When the vibration amplitude of the pole piece 4 exceeds the above-mentioned first set distance, it will push the displacement sensing end of the telescopic cylinder to move, and the acquisition module will receive the movement of the displacement sensing end. When the pole piece 4 is not in contact with the displacement sensing end, the displacement sensing end returns to the initial position.

[0044] Optionally, the acquisition module converts the acquired displacement signal into a displacement value or an early warning signal through the coating machine control panel.

[0045] In some optional embodiments, the above-mentioned pole piece coating status warning device also includes two sets of displacement detection components 3, which are respectively installed on the two above-mentioned sub-mounting frames 11, and are used to detect the displacement of the above-mentioned pole piece 4 in its width direction.

[0046] Optionally, the offset detection component 3 is also connected to the alarm system signal. When the pole piece 4 is displaced in its width direction and the displacement distance exceeds a second set distance, the offset detection component 3 will transmit the displacement signal to the alarm system, thereby facilitating the operator to make timely adjustments.

[0047] In some optional embodiments, the above-mentioned offset detection component 3 includes a laser transmitter 31 and a laser receiver 32 respectively arranged on both sides of the thickness direction of the pole piece 4, and the receiving end of the above-mentioned laser receiver 32 is arranged opposite to and aligned with the transmitting end of the above-mentioned laser transmitter 31.

[0048] It can be understood that the laser emitter 31 emits laser through the transmitting end. If the pole piece 4 is not offset, the pole piece 4 will cover the laser emitted by the laser emitter 31, and the laser receiver 32 cannot receive the laser signal; if the pole piece 4 is offset and no longer covers the laser emitted by the laser emitter 31, the laser receiver 32 receives the laser signal, and the operator needs to adjust the position of the pole piece 4 or the die head.

[0049] Preferably, the laser receiver 32 is connected to the alarm system signal, and when the laser receiver 32 receives the laser, the alarm system sounds an alarm.

[0050] In order to facilitate detection, the laser emitted by the laser emitter 31 is perpendicular to the pole piece 4 .

[0051] In some optional implementations, the two sub-mounting frames 11 may be closer to or farther away from each other to accommodate the pole pieces 4 of different widths.

[0052] Furthermore, the two sub-mounting frames 11 are moved closer to or farther away from each other through a displacement driving member 12. The displacement driving member 12 includes a slide rail 121 and a drive motor 122. The slide rail 121 is slidably matched with the sub-mounting frames 11. The output end of the drive motor 122 is connected to the sub-mounting frames 11 to drive the two sub-mounting frames 11 to slide on the slide rail 121.

[0053] Optionally, the displacement driving member 12 may be a telescopic cylinder, which pushes the sub-mounting frame 11 to move on the slide rail 121 through the telescopic movement of the output end.

[0054] In some optional embodiments, the sub-mounting frame 11 is threadably matched with the output end of the driving motor 122 , so that when the output end of the driving motor 122 rotates, the sub-mounting frame 11 slides on the slide rail 121 .

[0055] It can be understood that each sub-mounting frame 11 is slidably connected to the slide rail 121 and is threadedly matched with a driving motor 122. The driving motor 122 is fixedly arranged. When the output end of the driving motor 122 rotates, the sub-mounting frame 11 moves on the slide rail 121.

[0056] Optionally, two sub-mounting frames 11 can be connected to the two ends of the same slide rail 121 and connected to the output end of the same drive motor 122. The output end of the drive motor 122 is provided with positive and negative threads, which respectively cooperate with the two sub-mounting frames 11, so that when the output end of the drive motor 122 rotates, the two sub-mounting frames 11 move toward or away from each other.

[0057] In some optional embodiments, the sub-mounting frame 11 includes a connecting frame 111 and a U-shaped mounting frame 112, one end of the connecting frame 111 slidingly cooperates with the slide rail 121; the U-shaped mounting frame 112 is connected to the other end of the connecting frame 111, the pole piece 4 is partially located in the opening of the U-shaped mounting frame 112, and the jitter detection component 2 is installed on the U-shaped mounting frame 112.

[0058] In this example, the two detection units 21 are respectively mounted on two opposite side walls of the opening of the U-shaped mounting frame 112 and are located within the coverage area of ​​the pole piece 4 .

[0059] Preferably, the laser transmitter 31 and the laser receiver 32 are also mounted on two opposite side walls of the opening of the U-shaped mounting frame 112 , and are located within the coverage area of ​​the pole piece 4 .

[0060] It should be noted that the relative positions of the shake detection component 2 and the offset detection component 3 on the U-shaped mounting frame 112 can be adjusted according to the detection needs. Taking the embodiment of the present application as an example, the offset detection component 3 is close to the opening of the U-shaped mounting frame 112, and the shake detection component 2 is closer to the closed end of the U-shaped mounting frame 112, so that the displacement of the pole piece 4 in its width direction has a larger displacement space.

[0061] Furthermore, the connecting frame 111 can be extended and retracted in a direction perpendicular to the pole piece 4 to adjust the position of the U-shaped mounting frame 112 and adapt to pole pieces of different heights, so that detection can be performed at any position of the pole piece during its tape running.

[0062] In some optional embodiments, the vibration detection component 2 can be moved on the U-shaped mounting frame 112 along the width direction of the pole piece 4 .

[0063] The purpose of this setting is to adjust the jitter detection point of the pole piece 4.

[0064] Preferably, the above-mentioned offset detection assembly 3 can be moved along the width direction of the above-mentioned pole piece 4 on the above-mentioned U-shaped mounting frame 112. The purpose of such a setting is to adjust the movable space of the pole piece 4 in its width direction. For example, if the two groups of offset detection assemblies 3 are closer to the outer edge of the pole piece 4, the movable space of the pole piece 4 in its width direction is smaller; if the two groups of offset detection assemblies 3 are closer to the middle of the pole piece 4, the movable space of the pole piece 4 in its width direction is larger.

[0065] The working principle of the embodiment of the present application is as follows: according to the position of the pole piece 4 to be detected, the height of the connecting frame 111 is adjusted, and according to the width of the pole piece 4, the relative distance between the two sub-mounting frames 11 is adjusted, so that part of the pole piece 4 is located in the opening of the U-shaped mounting frame 112, and the pole piece 4 is located between the laser emitter 31 and the laser receiver 32, and between the two detection units 21. When the pole piece 4 shakes or settles and exceeds the first set distance, the telescopic end of the detection unit 21 detects a displacement signal, and when the pole piece 4 is displaced in the width direction and exceeds the second set distance, the laser receiver 32 receives the signal of the laser emitter 31, and the operator can adjust the relative position of the die head 6 and the pole piece state according to the above signal.

[0066] The utility model provides a pole piece coating status warning device, which detects the jitter and sagging of the pole piece 4 in its width direction through a jitter detection component 2, so as to facilitate the control of the pole piece wrinkling rate and the probability of the dissolving zone of the glue being enlarged, and reduce the defective rate of the pole piece coating; by arranging a group of jitter detection components 2 on both sides of the pole piece 4 in the width direction, it can adapt to the tension and uneven sagging caused by the uneven material of the pole piece 4, so as to more accurately detect the displacement of the entire pole piece 4 in the thickness direction; by the offset detection component 3, the displacement of the above-mentioned pole piece 4 in its width direction is detected, so as to avoid the dissolving zone exceeding the specification; the above-mentioned two sub-mounting frames 11 are moved closer to or away from each other through the displacement driving member 12, so as to adapt to pole pieces 4 of different widths.

[0067] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0068] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0069] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A pole piece coating status warning device, characterized in that: include: Mounting bracket (1); A shake detection component (2), the shake detection component (2) being mounted on the mounting bracket (1), the shake detection component (2) comprising two detection units (21), the two detection units (21) being arranged on both sides of the pole piece (4) in the thickness direction, and being used to detect the displacement of the pole piece (4) in the thickness direction.

2. The electrode coating status warning device according to claim 1, characterized in that: The mounting bracket (1) comprises two sub-mounting frames (11) located on both sides of the pole piece (4) in the width direction, and the vibration detection components (2) are provided with two groups, which are respectively mounted on the two sub-mounting frames (11).

3. The electrode coating status warning device according to claim 2, characterized in that: The detection unit (21) comprises: A displacement sensing end, which can be extended and retracted in the thickness direction of the pole piece (4); The acquisition module is connected to the displacement sensing end signal and is used to acquire the displacement signal of the displacement sensing end.

4. The electrode coating status warning device according to claim 2, characterized in that: It also comprises two groups of displacement detection components (3), which are respectively mounted on the two sub-mounting frames (11) and are used to detect the displacement of the pole piece (4) in the width direction thereof.

5. The electrode coating status warning device according to claim 4, characterized in that: The offset detection component (3) comprises a laser transmitter (31) and a laser receiver (32) respectively arranged on both sides of the pole piece (4) in the thickness direction, and the receiving end of the laser receiver (32) is arranged opposite to and aligned with the transmitting end of the laser transmitter (31).

6. The electrode coating status warning device according to any one of claims 2 to 5, characterized in that: The two sub-mounting frames (11) can be moved closer to or farther from each other, and are used to adapt to pole pieces (4) of different widths.

7. The electrode coating status warning device according to claim 6, characterized in that: The two sub-mounting frames (11) are moved closer to or farther away from each other via a displacement driving member (12), wherein the displacement driving member (12) comprises: A slide rail (121) which is slidably matched with the sub-mounting frame (11); A driving motor (122) has an output end connected to the sub-mounting frame (11) so as to drive the sub-mounting frame (11) to slide on the slide rail (121).

8. The electrode coating status warning device according to claim 7, characterized in that: The sub-mounting frame (11) is threadably matched with the output end of the driving motor (122), so that when the output end of the driving motor (122) rotates, the sub-mounting frame (11) slides on the slide rail (121).

9. The electrode coating status warning device according to claim 7, characterized in that: The sub-mounting frame (11) comprises: A connecting frame (111), one end of which is slidably matched with the slide rail (121); A U-shaped mounting frame (112) is connected to the other end of the connecting frame (111), the pole piece (4) is partially located in the opening of the U-shaped mounting frame (112), and the vibration detection component (2) is installed on the U-shaped mounting frame (112).

10. The electrode coating status warning device according to claim 9, characterized in that: The vibration detection component (2) can move on the U-shaped mounting frame (112) along the width direction of the pole piece (4).

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