Tab status detection method and detection device

Abstract

The present invention provides a tab state detection method and detection device. The tab state detection method includes setting a thickness detection sensor on a winding needle according to the location of the tab. At least a portion of the tab extends from one axial end of the winding needle. The thickness detection sensor forms a detection point on the extended portion of the tab. The winding needle is driven to wind the winding core and the tab. During the winding process, the thickness detection sensor continuously or intermittently detects the thickness of the tab at the detection point. The tab state is determined based on the thickness detected by the thickness detection sensor. The tab state detection method of the present invention sets the tab on the winding needle with an extended portion. The thickness detection sensor forms a detection point on the extended portion so that the thickness of the tab at the detection point can be directly obtained. The tab state is then determined based on the thickness at the detection point. The amount of data detection and comparison is small, and the thickness detection sensor is easy to set up. The tab state can be quickly and accurately detected and determined.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a tab status detection method and a detection device. Background Art

[0002] During the winding process of the winding needle, the tabs may be folded over, resulting in defective products. In related technologies, a CCD camera is set up to capture images of the tabs to determine whether the tabs are folded over, or the thickness of the winding core and tabs are separately measured and compared with the thickness of the tabs to determine whether the tabs are folded over. However, the method of judging by CCD cameras has image blind spots, and the judgment result is less accurate. The method of comparing the thickness of the winding core and tabs is complex and requires a large amount of data detection and comparison, which can easily lead to incorrect judgment results due to data anomalies. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a tab status detection method that can quickly and accurately detect and determine the status of the tab.

[0004] An embodiment of the present invention further provides a detection device.

[0005] The tab status detection method of an embodiment of the present invention includes:

[0006] A thickness detection sensor is provided at the winding needle according to the location of the tab, wherein at least a portion of the tab extends from one axial end of the winding needle, and the thickness detection sensor forms a detection point at the extended portion of the tab;

[0007] The winding needle is driven to wind the winding core and the tab, and during the winding process, the thickness detection sensor continuously or intermittently detects the thickness of the tab at the detection point;

[0008] The state of the tab is determined based on the thickness detected by the thickness detection sensor.

[0009] The tab status detection method of an embodiment of the present invention sets the tab on the winding needle to have an extended portion extending from one axial end of the winding needle, and forms a detection point on the extended portion through a thickness detection sensor, so as to directly obtain the thickness of the tab at the detection point, and then judge the status of the tab by the thickness at the detection point. The data detection amount and comparison amount are small, and the thickness detection sensor is easy to set up, and can quickly and accurately detect and judge the status of the tab.

[0010] In some embodiments, the step of determining the state of the tab according to the thickness detected by the thickness detection sensor specifically includes:

[0011] Each time the winding needle rotates one circle, the thickness increase value detected by the thickness detection sensor is recorded as h, and the thickness of the tab body of the tab is recorded as x. When h<x, the tab is in an abnormal state.

[0012] In some embodiments, the step of determining the state of the tab according to the thickness detected by the thickness detection sensor further includes:

[0013] The sum of the thickness of the pole piece of the winding core, the thickness of the diaphragm of the winding core and the shaking distance of the pole tab is recorded as y. When x≤h≤x+y, the pole tab is in a normal state. When h>x+y, the data is abnormal and a fault occurs.

[0014] In some embodiments, the thickness detection sensor includes a transmitter and a receiver, the transmitter and the receiver are spaced apart along the radial direction of the winding needle, and the detection point is formed between the transmitter and the receiver;

[0015] During the winding process, the protruding portion of the tab is continuously or intermittently located between the transmitter and the receiver.

[0016] In some embodiments, along the radial direction of the winding needle, one of the transmitter and the receiver is located on the side of the tab facing the winding needle, and the other of the transmitter and the receiver is located on the other side of the tab away from the winding needle. The transmitter and the receiver are spaced apart along the axial direction of the winding needle, and along the axial direction of the winding needle, the other is located relative to the one on the side of the tab away from the winding core.

[0017] In some embodiments, the tab has at least two corners at one end other than the end connected to the winding core, and at least two thickness detection sensors are provided. The thickness detection sensors are provided in a one-to-one correspondence with the corners, and the detection points are formed at the corresponding corners.

[0018] When h<x appears on one of the thickness detection sensors, the tab is in an abnormal state, and the tab monomer of the tab is folded at the corresponding corner;

[0019] When h<x appears in all the thickness detection sensors, the tab is in an abnormal state, and the tab unit of the tab is entirely folded.

[0020] In some embodiments, the tabs include a positive tab and a negative tab, and each of the positive tab and the negative tab is provided with at least two corresponding thickness detection sensors.

[0021] The detection device for implementing the tab status detection method of the embodiment of the present invention includes a mounting frame and the thickness detection sensor. The thickness detection sensor is arranged on the mounting frame. The mounting frame is located on the axial side of the winding needle and can move along the axial direction of the winding needle relative to the winding needle.

[0022] The detection device of the embodiment of the present invention can implement the tab status detection method of the embodiment of the present invention, so as to quickly and accurately detect and determine the status of the tab. The detection device has a simple structure and is easy to set and adjust the thickness detection sensor.

[0023] In some embodiments, the thickness detection sensor includes a transmitter and a receiver, and the mounting frame includes an outer ring frame and a center frame, the outer ring frame is a ring-shaped frame arranged around the axial direction of the winding needle, and the outer ring frame surrounds the outer circumference of the center frame, one of the transmitter and the receiver is arranged at the end of the center frame, and the other of the transmitter and the receiver is arranged at the end of the outer ring frame.

[0024] In some embodiments, one of the transmitter and the receiver is movable relative to the central frame along the circumference of the central frame, and the other of the transmitter and the receiver is movable relative to the outer ring frame along the circumference of the outer ring frame; and / or

[0025] The mounting bracket and the winding needle can rotate synchronously, and the mounting bracket can be connected to and separated from the winding needle along the axial direction of the winding needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 1 is a schematic diagram of the detection process of the tab status detection method according to an embodiment of the present invention;

[0027] Figure 2 yes Figure 1 Side view of the middle mounting bracket and thickness detection sensor;

[0028] Figure 3 Schematic diagram of the detection point settings in an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of corner folding in an embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of the overall folding in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1. Winding needle; 2. Tab; 21. Tab unit; 22. Positive tab; 23. Negative tab; 3. Thickness detection sensor; 31. Transmitter; 32. Receiver; 4. Detection point; 5. Winding core; 6. Mounting frame; 61. Outer ring frame; 62. Center frame. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] Reference below Figure 1-Figure 5 A tab status detection method and a detection device according to an embodiment of the present invention are described.

[0035] like Figure 1-Figure 5 As shown, the tab status detection method of an embodiment of the present invention includes disposing a thickness detection sensor 3 on a winding needle 1 according to the location of the tab 2. The tab 2 at least partially extends from one axial end of the winding needle 1. The thickness detection sensor 3 forms a detection point 4 at the extended portion of the tab 2. The winding needle 1 is driven to wind the winding core 5 and the tab 2. During the winding process, the thickness detection sensor 3 continuously or intermittently detects the thickness of the tab 2 at the detection point 4. The status of the tab 2 is determined based on the thickness detected by the thickness detection sensor 3.

[0036] Specifically, such as Figure 1 As shown, the winding needle 1 extends in the left-right direction and can rotate about its axis to wind the winding core 5 and the tab 2 around its outer circumference, thereby manufacturing a battery cell. The winding core 5 and the tab 2 are wound around the right end of the winding needle 1, and the tab 2 is located at the right end of the winding core 5, with the right end and middle portion of the tab 2 extending rightward from the right end of the winding needle 1.

[0037] First, a thickness detection sensor 3 is set on the right side of the winding needle 1 according to the position of the tab 2 , and the thickness detection sensor 3 forms a detection point 4 at the protruding part of the tab 2 .

[0038] Then the winding needle 1 is driven to wind the winding core 5 and the tab 2. During the winding process, the thickness detection sensor 3 continuously or intermittently detects the thickness of the tab 2 at the detection point 4, preferably continuously.

[0039] The state of the tab 2 can be judged based on the thickness detected by the thickness detection sensor 3. The state of the tab 2 can be judged based on the thickness change value detected by the thickness detection sensor 3 during the winding process, or the state of the tab 2 can be judged based on the final thickness value detected by the thickness detection sensor 3 after the winding is completed.

[0040] The tab status detection method of an embodiment of the present invention sets the tab on the winding needle to have an extended portion extending from one axial end of the winding needle, and forms a detection point on the extended portion through a thickness detection sensor, so as to directly obtain the thickness of the tab at the detection point, and then judge the status of the tab by the thickness at the detection point. The data detection amount and comparison amount are small, and the thickness detection sensor is easy to set up, and can quickly and accurately detect and judge the status of the tab.

[0041] In some embodiments, the step of judging the state of the tab 2 based on the thickness detected by the thickness detection sensor 3 specifically includes: every time the winding needle 1 rotates one circle, the thickness increase value detected by the thickness detection sensor 3 is recorded as h, and the thickness of the tab monomer 21 of the tab 2 is recorded as x. When h<x, the tab 2 is in an abnormal state.

[0042] Specifically, the thickness detection sensor 3 can rotate synchronously around the axial direction of the winding needle 1 at the same angular velocity as the winding needle 1 to continuously detect the thickness of the tab 2 at the detection point 4. The thickness detection sensor 3 is electrically connected to the controller. The controller can obtain and record the thickness information obtained by the thickness detection sensor 3 every week during the rotation process, and calculate the thickness information obtained in the current week with the thickness information obtained in the previous week to obtain the thickness increase value h obtained by the thickness detection sensor 3.

[0043] The thickness detection sensor 3 can also be fixedly set relative to the winding needle 1. Every time the winding needle 1 rotates one circle, the detection point 4 on the protruding part of the tab 2 will pass through the position corresponding to the thickness detection sensor 3, and will be detected by the thickness detection sensor 3 to obtain thickness information when passing. The thickness detection sensor 3 is electrically connected to the controller. The controller can obtain and record the thickness information detected each time the detection point 4 passes, and calculate the thickness information obtained at the current passing time with the thickness information obtained at the previous passing time to obtain the thickness increase value h detected by the thickness detection sensor 3.

[0044] Preferably, the thickness detection sensor 3 rotates synchronously with the winding needle 1 .

[0045] The tab 2 is formed by overlapping multiple tab monomers 21 during the winding process. The thickness of the multiple tab monomers 21 is the same and is x. The controller inputs the thickness x of the tab monomer 21 in advance. During the winding process of the winding needle 1, the controller will obtain the corresponding thickness increase value h every time the winding needle 1 rotates one circle, and compare the thickness increase value h with the thickness x of the tab monomer 21. When h<x, the tab 2 is judged to be in an abnormal state.

[0046] Furthermore, the controller has a display. When the controller determines that the tab 2 is in an abnormal state, the display displays corresponding information to prompt the operator so that the operator can subsequently process the tab 2.

[0047] Furthermore, the device for driving the thickness detection sensor 3 to rotate and the winding needle 1 are electrically connected to the controller. When the controller determines that the pole ear 2 is in an abnormal state, the controller stops the device for driving the thickness detection sensor 3 to rotate and the winding needle 1 from rotating, so that the operator can subsequently process the pole ear 2.

[0048] It should be noted that the abnormal state of the tab 2 includes the tab unit 21 being folded and the tab unit 21 being misaligned.

[0049] In some embodiments, the step of judging the state of the tab 2 based on the thickness detected by the thickness detection sensor 3 further specifically includes the sum of the thickness of the pole piece of the winding core 5, the thickness of the diaphragm of the winding core 5 and the shaking distance of the tab 2, which is recorded as y. When x≤h≤x+y, the tab 2 is in a normal state. When h>x+y, the data is abnormal and a fault occurs.

[0050] Specifically, the winding core 5 is formed by winding the pole pieces and the separator. In the wound winding core 5 , the pole pieces and the separators are arranged one by one in a spaced manner, wherein the pole pieces further include a positive pole piece and a negative pole piece.

[0051] The thickness of the pole piece and the thickness of the diaphragm can be known before winding. The jitter distance of the pole tab 2 along the radial direction of the winding needle 1 during the winding process is selected by the operator according to the jitter record during the work process, or set by the operator based on work experience. The sum of the thickness of the pole piece, the thickness of the diaphragm and the jitter distance of the pole tab 2 is y, and the y value is input into the controller in advance.

[0052] During the winding process of the winding needle 1, every time the winding needle 1 rotates one circle, the controller will compare the obtained thickness increase value h with the y value. When x≤h≤x+y, the pole ear 2 is judged to be in a normal state, and the device driving the thickness detection sensor 3 to rotate and the winding needle 1 continue to rotate. When h>x+y, the data is abnormal. It may be that the thickness detection sensor 3 detects an abnormality in the thickness data obtained, or that the thickness detection sensor 3 transmits the thickness data to the controller in an abnormality, or that the controller has an abnormality during the comparison process. At this time, an equipment failure occurs, and the controller stops the device driving the thickness detection sensor 3 to rotate and the winding needle 1 to facilitate the operator to perform equipment maintenance, including maintenance of the thickness detection sensor 3, the winding needle 1, the controller and the circuit.

[0053] In some embodiments, the thickness detection sensor 3 includes a transmitter 31 and a receiver 32. The transmitter 31 and the receiver 32 are spaced apart along the radial direction of the winding needle 1, and the detection point 4 is formed between the transmitter 31 and the receiver 32. During the winding process, the protruding portion of the tab 2 is continuously or intermittently located between the transmitter 31 and the receiver 32.

[0054] like Figure 1As shown, the thickness detection sensor 3 includes a transmitter 31 and a receiver 32. When setting the thickness detection sensor 3, the transmitter 31 and the receiver 32 need to be set at the same time. According to the position of the protruding portion of the tab 2, the transmitter 31 and the receiver 32 are set at intervals along the radial direction of the winding needle 1. They can be overlapped along the radial direction of the winding needle 1 or tilted along the radial direction of the winding needle 1. During the rotation of the winding needle 1, the protruding portion of the tab 2 is continuously or intermittently located between the transmitter 31 and the receiver 32, as shown in FIG. Figure 1 As shown by the dotted line in the figure, the wave emitted by the transmitter 31 passes through the protruding part of the pole lug 2 and is then received by the receiver 32, so that the protruding part of the pole lug 2 forms a detection point 4 between the transmitter 31 and the receiver 32. The detection point 4 is the position where the wave passes through the protruding part of the pole lug 2.

[0055] The thickness detection sensor 3 is preferably a laser thickness sensor.

[0056] In some embodiments, along the radial direction of the winding needle 1, one of the transmitter 31 and the receiver 32 is located on the side of the pole tab 2 facing the winding needle 1, and the other of the transmitter 31 and the receiver 32 is located on the other side of the pole tab 2 away from the winding needle 1. The transmitter 31 and the receiver 32 are arranged at intervals along the axial direction of the winding needle 1, and along the axial direction of the winding needle 1, the other is located relative to one on the side of the pole tab 2 away from the winding core 5.

[0057] like Figure 1 As shown, the transmitter 31 and the receiver 32 are arranged at intervals along the radial direction of the winding needle 1. Along the radial direction of the winding needle 1, the transmitter 31 is located on the side of the pole lug 2 facing the winding needle 1, and the receiver 32 is located on the other side of the pole lug 2 away from the winding needle 1. In other words, during the winding and rotation of the winding needle 1, the pole lug 2 forms an axial annular track around the winding needle 1, the transmitter 31 is located on the inner side of the annular track, and the receiver 32 is located on the outer side of the annular track.

[0058] The transmitter 31 and the receiver 32 are also arranged at intervals along the axial direction of the winding needle 1. Along the axial direction of the winding needle 1, the transmitter 31 corresponds to the middle of the winding needle 1, and the receiver 32 is located on the right side of the winding needle 1.

[0059] The wave between the transmitter 31 and the receiver 32 is tilted along the axial direction of the winding needle 1. In other words, the thickness detection sensor 3 measures the thickness at an angle to avoid interference between the thickness detection sensor 3 and the tab monomer 21 to be wound.

[0060] It is understandable that in other embodiments, the receiver 32 may be located inside the circular track and correspond to the middle of the winding needle 1, and the transmitter 31 may be located outside the circular track and on the right side of the winding needle 1.

[0061] In some embodiments, the end of the tab 2 that is different from the end connected to the winding core 5 has at least two corners. At least two thickness detection sensors 3 are provided, and the thickness detection sensors 3 are arranged in a one-to-one correspondence with the corners, forming detection points 4 at the corresponding corners. If h < x is displayed on one of the thickness detection sensors 3, the tab 2 is in an abnormal state, and the tab unit 21 of the tab 2 is folded at the corresponding corner. If h < x is displayed on all thickness detection sensors 3, the tab 2 is in an abnormal state, and the tab unit 21 of the tab 2 is folded as a whole.

[0062] like Figure 3-Figure 5 As shown, the tab 2 is formed by stacking a plurality of rectangular tab units 21 and has a connecting end and a free end that are relatively arranged. The connecting end is connected to the winding core 5 and the free end is freely arranged and has two corners.

[0063] There are two thickness detection sensors 3 provided in one-to-one correspondence with the two corners, and each thickness detection sensor 3 forms a detection point 4 at the corresponding corner.

[0064] like Figure 4 As shown, during the winding process, the front tab monomer 21 is set flat, and the right corner of the rear tab monomer 21 is folded. At this time, the thickness increase value h≥x obtained by the thickness detection sensor 3 corresponding to the left corner, and the thickness increase value h<x obtained by the thickness detection sensor 3 corresponding to the right corner, judges that the tab 2 is in an abnormal state and has a folded corner, and the data from the two thickness detection sensors 3 can be used to know that the right corner has a folded corner.

[0065] like Figure 5 As shown, during the winding process, the front tab monomer 21 is arranged flat, and the rear tab monomer 21 is folded downward in the middle. At this time, the thickness increase value h obtained by the thickness detection sensor 3 corresponding to the left corner is less than x, and the thickness increase value h obtained by the thickness detection sensor 3 corresponding to the right corner is less than x. It is judged that the tab 2 is in an abnormal state and is folded as a whole.

[0066] When the thickness increase values ​​h obtained by the two thickness detection sensors 3 are both x≤h≤x+y, the tab 2 is in a normal state.

[0067] It is understood that the tab state detection method of the embodiment of the present invention is not limited to detecting abnormal states caused by folding. In other embodiments, it can also be used to detect abnormal states caused by misalignment, for example, by forming multiple detection points in a row. Figure 4 The middle part of the pole ear in the orientation shown is arranged at intervals along the left and right directions.

[0068] It can be understood that the number of thickness detection sensors is not limited to two. In other embodiments, there are more than two thickness detection sensors to detect and confirm the size of the folded portion, or there is only one thickness detection sensor.

[0069] In some embodiments, the tab 2 includes a positive tab 22 and a negative tab 23 , and each of the positive tab 22 and the negative tab 23 is provided with at least two corresponding thickness detection sensors 3 .

[0070] like Figure 3 As shown, the tab 2 includes a positive tab 22 and a negative tab 23. The two corners of the free end of the positive tab 22 are each provided with a corresponding thickness detection sensor 3 to form a detection point at each corner of the free end. The two corners of the free end of the negative tab 23 are also provided with a corresponding thickness detection sensor 3 to form a detection point at each corner of the free end. In other words, there are four thickness detection sensors 3, two of which are set in a one-to-one correspondence with the two corners of the free end of the positive tab 22, and the other two are set in a one-to-one correspondence with the two corners of the free end of the negative tab 23.

[0071] This allows the states of the positive electrode tab 22 and the negative electrode tab 23 to be detected separately.

[0072] like Figure 1-Figure 5 As shown, the detection device for implementing the tab status detection method according to an embodiment of the present invention includes a mounting bracket 6 and a thickness detection sensor 3. The thickness detection sensor 3 is arranged on the mounting bracket 6. The mounting bracket 6 is located on one axial side of the winding needle 1 and can move along the axial direction of the winding needle 1 relative to the winding needle 1.

[0073] like Figure 1 and Figure 2 As shown, the mounting bracket 6 is arranged on the right side of the winding needle 1 and can be moved in the left and right directions relative to the winding needle 1. A thickness detection sensor 3 is provided at the left end of the mounting bracket 6. By moving the mounting bracket 6 in the left and right directions, the position of the thickness detection sensor 3 relative to the tab 2 in the left and right directions can be adjusted to set the thickness detection sensor 3 according to the position of the tab 2.

[0074] The detection device of the embodiment of the present invention can implement the tab status detection method of the embodiment of the present invention, so as to quickly and accurately detect and determine the status of the tab. The detection device has a simple structure and is easy to set and adjust the thickness detection sensor.

[0075] In some embodiments, the thickness detection sensor 3 includes a transmitter 31 and a receiver 32, and the mounting frame 6 includes an outer ring frame 61 and a center frame 62. The outer ring frame 61 is a ring-shaped frame arranged axially around the winding needle 1, and the outer ring frame 61 surrounds the outer circumference of the center frame 62. One of the transmitter 31 and the receiver 32 is located at the end of the center frame 62, and the other of the transmitter 31 and the receiver 32 is located at the end of the outer ring frame 61.

[0076] like Figure 1 and Figure 2 As shown, the mounting frame 6 includes an outer ring frame 61, a center frame 62 and a connecting frame. The outer ring frame 61 and the center frame 62 both extend in the left and right directions. The center frame 62 is a rod extending along the axial direction of the winding needle 1. The outer ring frame 61 is a ring arranged around the axial direction of the winding needle 1. The outer ring frame 61 surrounds the outer periphery of the center frame 62 and is spaced apart from the outer peripheral surface of the center frame 62.

[0077] The right end of the outer ring frame 61 is flush with the right end of the center frame 62 and is connected by a connecting frame. The left end of the outer ring frame 61 is located to the right of the left end of the center frame 62. In other words, the length of the outer ring frame 61 in the left-right direction is shorter than the length of the center frame 62 in the left-right direction. The transmitter 31 is provided on the outer circumference of the left end of the center frame 62, and the receiver 32 is provided on the inner circumference of the left end of the outer ring frame 61 to prevent the thickness detection sensor 3 and the mounting frame 6 from interfering with the tab monomer 21 to be wound.

[0078] Preferably, there are four transmitters 31 and four receivers 32 arranged in a one-to-one correspondence, the four transmitters 31 are arranged at intervals along the circumference of the central frame 62 , and the four receivers 32 are arranged at intervals along the circumference of the outer ring frame 61 .

[0079] In some embodiments, one of the transmitter 31 and the receiver 32 can move along the circumference of the central frame 62 relative to the central frame 62, and the other of the transmitter 31 and the receiver 32 can move along the circumference of the outer ring frame 61 relative to the outer ring frame 61.

[0080] like Figure 2 As shown, the transmitter 31 is disposed on the outer circumferential surface of the left end of the center frame 62 and is movable relative to the center frame 62 along the circumference of the center frame 62. The receiver 32 is disposed on the inner circumferential surface of the left end of the outer ring frame 61 and is movable relative to the outer ring frame 61 along the circumference of the outer ring frame 61. This facilitates adjustment of the positions of the transmitter 31 and receiver 32 to accommodate battery cells of different sizes and models. Different testing standards can also be applied to battery cells of the same size and model. The closer the testing point 4 is to the corner endpoint, the stricter the testing standard.

[0081] The transmitter 31 and the center frame 62 , as well as the receiver 32 and the outer ring frame 61 , can be connected via a slide groove and a slider, respectively, or can be connected via a slide rail.

[0082] In some embodiments, the mounting bracket 6 and the winding needle 1 can rotate synchronously, and the mounting bracket 6 can be connected to and separated from the winding needle 1 along the axial direction of the winding needle 1.

[0083] like Figure 1As shown, the mounting frame 6 can rotate synchronously around the axial direction of the winding needle 1 at the same angular velocity as the winding needle 1. The mounting frame 6 and the winding needle 1 can be connected to the same driver through a transmission mechanism, or can be connected to corresponding drivers respectively. A slot is provided on the right end face of the winding needle 1, and the mounting frame 6 can move in the left and right directions relative to the winding needle 1 so that the left end of the center frame 62 can be inserted into and out of the slot. On the one hand, it ensures that the mounting frame 6 and the winding needle 1 rotate synchronously, and on the other hand, it can ensure the relative stability of the mounting frame 6 and the winding needle 1 during the rotation process, thereby avoiding position deviation between the thickness detection sensor 3 and the corresponding pole ear 2.

[0084] In the description of the present invention, 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 to 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 invention 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 should not be understood as limiting the present invention.

[0085] Furthermore, the terms "first" and "second" are used solely for distinction and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0086] In the present invention, 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 the present invention based on specific circumstances.

[0087] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0088] In the present invention, 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 invention. In this specification, the schematic expressions 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.

[0089] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A method for detecting the state of a tab, characterized in that: include: A thickness detection sensor (3) is provided at the winding needle (1) according to the position of the pole lug (2), at least a portion of the pole lug (2) extends from one axial end of the winding needle (1), and the thickness detection sensor (3) forms a detection point (4) at the extended portion of the pole lug (2), the thickness detection sensor (3) comprises a transmitter (31) and a receiver (32), the transmitter (31) and the receiver (32) are arranged at intervals along the radial direction of the winding needle (1), and the detection point (4) is formed between the transmitter (31) and the receiver (32); The winding needle (1) is driven to wind the winding core (5) and the tab (2), and during the winding process, the extended portion of the tab (2) is continuously or intermittently located between the transmitter (31) and the receiver (32), and the thickness detection sensor (3) continuously or intermittently detects the thickness of the tab (2) at the detection point (4); The state of the tab (2) is determined based on the thickness detected by the thickness detection sensor (3).

2. The tab status detection method according to claim 1, characterized in that: The step of judging the state of the tab (2) according to the thickness detected by the thickness detection sensor (3) specifically comprises: Each time the winding needle (1) rotates one circle, the thickness increase value detected by the thickness detection sensor (3) is recorded as h, and the thickness of the tab monomer (21) of the tab (2) is recorded as x. When h<x, the tab (2) is in an abnormal state.

3. The tab status detection method according to claim 2, characterized in that: The step of judging the state of the tab (2) according to the thickness detected by the thickness detection sensor (3) further specifically includes: The sum of the thickness of the pole piece of the winding core (5), the thickness of the diaphragm of the winding core (5) and the shaking distance of the pole tab (2) is recorded as y. When x≤h≤x+y, the pole tab (2) is in a normal state. When h>x+y, the data is abnormal and a fault occurs.

4. The tab status detection method according to claim 1, characterized in that: Along the radial direction of the winding needle (1), one of the transmitter (31) and the receiver (32) is located on the side of the pole lug (2) facing the winding needle (1), and the other of the transmitter (31) and the receiver (32) is located on the other side of the pole lug (2) away from the winding needle (1). The transmitter (31) and the receiver (32) are spaced apart along the axial direction of the winding needle (1), and along the axial direction of the winding needle (1), the other is located relative to the one on the side of the pole lug (2) away from the winding core (5).

5. The tab status detection method according to claim 2, characterized in that: The tab (2) has at least two corners at one end different from the end connected to the winding core (5), and at least two thickness detection sensors (3) are provided. The thickness detection sensors (3) are provided in a one-to-one correspondence with the corners, and the detection points (4) are formed at the corresponding corners. When h<x appears on one of the thickness detection sensors (3), the tab (2) is in an abnormal state, and the tab monomer (21) of the tab (2) is folded at the corresponding corner; When h<x appears in all the thickness detection sensors (3), the tab (2) is in an abnormal state, and the tab monomer (21) of the tab (2) is folded as a whole.

6. The tab status detection method according to claim 5, characterized in that: The tab (2) comprises a positive tab (22) and a negative tab (23), and each of the positive tab (22) and the negative tab (23) is provided with at least two corresponding thickness detection sensors (3).

7. A detection device for implementing the tab status detection method according to any one of claims 1 to 6, characterized in that: The invention comprises a mounting frame (6) and the thickness detection sensor (3), wherein the thickness detection sensor (3) is arranged on the mounting frame (6), and the mounting frame (6) is located on one axial side of the winding needle (1) and is movable along the axial direction of the winding needle (1) relative to the winding needle (1).

8. The detection device according to claim 7, characterized in that The thickness detection sensor (3) includes a transmitter (31) and a receiver (32), and the mounting frame (6) includes an outer ring frame (61) and a center frame (62), wherein the outer ring frame (61) is annular and arranged around the axial direction of the winding needle (1), and the outer ring frame (61) surrounds the outer circumference of the center frame (62), and one of the transmitter (31) and the receiver (32) is arranged at an end of the center frame (62), and the other of the transmitter (31) and the receiver (32) is arranged at an end of the outer ring frame (61).

9. The detection device according to claim 8, characterized in that One of the transmitter (31) and the receiver (32) is movable relative to the central frame (62) along the circumference of the central frame (62), and the other of the transmitter (31) and the receiver (32) is movable relative to the outer ring frame (61) along the circumference of the outer ring frame (61); and / or The mounting frame (6) and the winding needle (1) can rotate synchronously, and the mounting frame (6) can be connected to and separated from the winding needle (1) along the axial direction of the winding needle (1).

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