Die-cutting device and die-cutting method for reinforcing rib embossing

Abstract

The present invention relates to a die-cutting device and a die-cutting method for embossing reinforcing ribs, wherein the die-cutting device comprises an unwinding mechanism, a rewinding mechanism, a deviation-correcting mechanism, a tab appearance detection mechanism, an embossing mechanism, a die-cutting mechanism and a controller; the unwinding mechanism, the deviation-correcting mechanism, the embossing mechanism, the die-cutting mechanism and the rewinding mechanism are arranged in sequence so that the pole piece passes in sequence; the deviation-correcting mechanism is used to obtain the position signal of the tab area in the pole piece and adjust the relative position with the tab area; the tab appearance detection mechanism is used to determine the appearance signal of the tab area; the embossing mechanism is used to emboss the tab area; the die-cutting mechanism is used to die-cut the embossed pole piece; the controller is used to adjust the position of the tab appearance detection mechanism and the embossing mechanism and determine the embossing pressure of the embossing mechanism and the die-cutting state of the die-cutting mechanism according to the position signal and the appearance signal. This scheme can adjust the position and state of the embossing mechanism, the die-cutting mechanism and the tab appearance detection mechanism according to the state of the pole piece in real time.

Description

Technical Field

[0001] The invention relates to the technical field of lithium ion battery production and manufacturing, and in particular to a die-cutting device and a die-cutting method for reinforcing rib embossing. Background Art

[0002] The power lithium battery industry includes a tab die-cutting process, which is to cut the current collector into a raised structure (also called a tab) to divert current to the outside. Among them, the negative tab die-cutting equipment usually needs to emboss the tab to solve the problem of tab folding.

[0003] However, the embossing position of conventional cutting equipment mainly relies on manual adjustment, and the consistency of the effect during long-term operation is difficult to guarantee, and the consistency requirements of incoming materials are high. If wrinkled materials with tabs are encountered, manual speed reduction must be performed, which consumes labor and time costs. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a die-cutting device and a die-cutting method for rib embossing, which can automatically identify and process wrinkled materials while improving the consistency of embossing effect.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: On the one hand, a die-cutting device for embossing a reinforcing rib is provided, including an unwinding mechanism, a winding mechanism, a deviation correction mechanism, a tab appearance detection mechanism, an embossing mechanism, a die-cutting mechanism and a controller;

[0006] The unwinding mechanism, the deviation-correcting mechanism, the embossing mechanism, the die-cutting mechanism and the winding mechanism are arranged in sequence so that the pole pieces pass through in sequence;

[0007] The deflection correction mechanism is connected to the controller signal to obtain the position signal of the pole ear area in the pole piece and transmit it to the controller, and the controller controls the deflection correction mechanism to correct the pole piece according to the position signal;

[0008] The tab appearance detection mechanism is connected to the controller signal, and the detection area of ​​the tab appearance detection mechanism covers at least a part of the area between the embossing mechanism and the deviation correction mechanism, so as to obtain the appearance signal of the pole piece and transmit it to the controller;

[0009] The embossing mechanism and the die-cutting mechanism are respectively connected to the controller signal. The controller controls the embossing state of the embossing mechanism according to the position signal and the appearance signal to emboss the pole piece, and controls the die-cutting state of the die-cutting mechanism at least according to the appearance signal to die-cut the embossed pole piece.

[0010] Further, the tab appearance detection mechanism includes a crossbar, a first reciprocating motor and a wrinkle detection module;

[0011] The wrinkle detection module is mounted on the cross bar, and the cross bar is connected to the output end of the first reciprocating motor, so as to reciprocate under the drive of the first reciprocating motor and drive the wrinkle detection module to move along the axial direction of the cross bar;

[0012] The wrinkle detection module and the first reciprocating motor are respectively connected to the controller signal. The wrinkle detection module is used to detect the surface of the pole piece to obtain an appearance signal and transmit it to the controller; the controller controls the driving state of the first reciprocating motor according to the position signal to control the movement of the wrinkle detection module.

[0013] Furthermore, the embossing mechanism includes an embossing device, and the embossing device includes a screw rod, a second reciprocating motor, an up and down lifting motor and an embossing structural member;

[0014] The up-and-down lifting motor is movably connected to the lead screw, the output end of the second reciprocating electrode is fixedly connected to the lead screw to drive the up-and-down lifting motor to move along the axial direction of the lead screw, and the output end of the up-and-down lifting motor is connected to the embossing structure to drive the embossing structure to move along the direction intersecting with the lead screw;

[0015] Furthermore, the embossing mechanism further comprises a conveying roller for conveying the electrode piece;

[0016] The conveying roller is parallel to the screw rod and is arranged alternately.

[0017] Further, the controller includes a data acquisition module, a position adjustment amount determination module, an embossing pressure determination module, a die-cutting speed determination module and a control module which are signal-connected to each other;

[0018] The data acquisition module is used to acquire the initial positions of the deflection correction mechanism, the tab appearance detection mechanism and the embossing mechanism, the preset embossing width, and the position signal determined by the deflection correction mechanism and the appearance signal determined by the tab appearance detection mechanism, wherein the position signal is a coordinate signal of the tab area in the pole piece, and the appearance signal includes a wrinkle degree signal;

[0019] The position adjustment amount determination module is used to determine the position adjustment amount of the tab appearance detection mechanism and the embossing mechanism, and the correction amount of the tab appearance detection mechanism on the pole piece according to the position signal and the initial positions of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism;

[0020] The embossing pressure determination module is used to determine the embossing pressure of the embossing mechanism according to the wrinkle degree signal;

[0021] The die-cutting speed determination module is used to determine the die-cutting speed of the die-cutting mechanism according to the wrinkle degree signal;

[0022] The control module is signal-connected with the embossing mechanism, the deflection correction mechanism, the die-cutting mechanism and the tab appearance detection mechanism, so as to adjust the positions of the tab appearance detection mechanism and the embossing mechanism according to the position adjustment amount, adjust the embossing state of the embossing mechanism according to the embossing pressure, control the deflection correction mechanism to correct the pole piece according to the deflection correction amount, and adjust the die-cutting state of the die-cutting mechanism according to the die-cutting speed.

[0023] Further, the controller also includes an alarm module connected to the control module signal;

[0024] The appearance signal determined by the tab appearance detection mechanism also includes an actual tab width. The alarm module is used to send out an alarm signal when the actual tab width exceeds a preset embossing width. The control module controls the unwinding mechanism, the winding mechanism, the deviation correction mechanism, the tab appearance detection mechanism, the embossing mechanism and the die-cutting mechanism to close according to the alarm signal.

[0025] On the other hand, a die-cutting method for reinforcing rib embossing is provided, comprising:

[0026] The unwinding mechanism unwinds and conveys the electrode to be embossed;

[0027] The correction mechanism obtains the position signal of the pole ear area in the pole piece in real time and converts it into an electrical signal and sends it to the controller, and corrects the pole piece according to the position signal;

[0028] The controller adjusts the relative positions of the tab appearance detection mechanism and the embossing mechanism and the tab area in the pole piece in real time according to the received position signal and the initial positions of the deviation correction mechanism, the tab appearance detection mechanism and the embossing mechanism, and controls the deviation correction mechanism to correct the pole piece;

[0029] The tab appearance detection mechanism obtains the appearance signal of the tab area in the pole piece in real time at the current position and sends it to the controller;

[0030] The controller determines the embossing state of the embossing mechanism and the die-cutting state of the die-cutting mechanism in real time according to the received appearance signal, and controls the embossing mechanism to emboss the pole ear area, and controls the die-cutting mechanism to die-cut the embossed pole piece;

[0031] The winding mechanism winds up the die-cut pole piece.

[0032] Furthermore, the controller adjusts the relative positions of the tab appearance detection mechanism and the embossing mechanism and the tab area in the pole piece in real time according to the received position signal and the initial positions of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism, and controls the correction mechanism to correct the tab, including:

[0033] The data acquisition module acquires the initial positions a(x1) of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism, and the position signal a(x2) determined by the correction mechanism, which is the coordinate signal of the tab area;

[0034] The position adjustment amount determination module determines the correction amount of the electrode piece by the correction mechanism according to the initial positions a(x1) of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism and the position signal a(x2) determined by the correction mechanism, and calculates the position adjustment amount a(x1)-a(x2) of the tab appearance detection mechanism and the embossing mechanism;

[0035] The control module adjusts the relative position of the wrinkle detection module in the pole lug appearance detection mechanism and the pole lug area in the pole piece in real time through the first reciprocating motor in the pole lug appearance detection mechanism according to the position adjustment amount a(x1)-a(x2), and adjusts the relative position of the embossing structure in the embossing mechanism and the pole lug area in the pole piece in real time through the second reciprocating motor in the embossing mechanism.

[0036] Furthermore, the tab appearance detection mechanism acquires the appearance signal of the tab area in the pole piece in real time and sends it to the controller, including:

[0037] The wrinkle detection module detects the number of wrinkles on the surface of the pole piece, and outputs an appearance signal of the pole ear area to the controller based on the number of wrinkles, wherein the appearance signal includes a wrinkle degree signal b, wherein 0≤b≤100%.

[0038] Furthermore, the controller determines the embossing pressure F′ of the embossing mechanism in real time according to the received appearance signal:

[0039] F′=F*b*k1

[0040] Among them, F is the embossing pressure before adjustment, and k1 is the correction coefficient.

[0041] The present invention adopts the above technical solution, which has the following advantages:

[0042] 1. The present invention upgrades the traditional manual adjustment of embossing position mode to a reinforcing rib embossing adjustment mode, which can improve the process consistency of the embossing effect of the negative electrode die-cutting equipment, reduce the manual downtime debugging and material costs in the production process, and greatly improve the automation capability.

[0043] 2. The present invention is provided with a tab appearance detection mechanism and a newly added automatic processing function of wrinkled materials, which can improve the automation capability of the equipment, avoid the occurrence of tab cracking events, and reduce manufacturing costs.

[0044] 3. The traditional embossing mechanism cannot move in real time, resulting in the fluctuation of incoming materials and damaging the membrane area. The controller provided in the present invention can determine the position and embossing pressure of the embossing mechanism according to the position signal obtained by the deviation correction mechanism and the appearance signal determined by the tab appearance detection mechanism, so as to emboss the tab area, thereby avoiding the influence of incoming material differences on the tab embossing effect.

[0045] 4. The controller provided in the present invention can determine the die-cutting speed of the die-cutting mechanism according to the appearance signal of the tab area detected by the tab appearance detection mechanism. If the material is abnormal, the die-cutting mechanism can automatically switch to low-speed production. At the same time, the embossing mechanism can reduce the embossing pressure to avoid the problem of tab cracking.

[0046] In summary, the present invention can be widely used in the technical field of lithium-ion battery production and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0048] Figure 1 is a schematic diagram of the overall structure of a die-cutting device provided by an embodiment of the present invention;

[0049] Figure 2 is a schematic structural diagram of a pole piece provided by an embodiment of the present invention;

[0050] Figure 3 It is a structural schematic diagram of a deviation correction mechanism provided by an embodiment of the present invention;

[0051] Figure 4 It is a structural schematic diagram of a tab appearance detection mechanism provided by an embodiment of the present invention;

[0052] Figure 5 is a structural schematic diagram of an embossing mechanism provided by an embodiment of the present invention;

[0053] Figure 6 It is a schematic diagram of the process of position correction in the die-cutting method provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0054] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0055] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0056] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0057] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outer side", "below", "above", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0058] Since the embossing position of conventional die-cutting equipment mainly relies on manual adjustment, when encountering wrinkled materials on the tabs, manual speed reduction must be performed, which consumes labor and time costs. The die-cutting device and die-cutting method for embossing reinforcing ribs provided in the embodiments of the present invention, the deviation correction mechanism outputs the position signal of the tab area in the pole piece. The tab appearance detection mechanism detects the number of wrinkles in the tab area of ​​the pole piece, determines whether there are wrinkles in the tab area, and outputs the appearance signal of the tab area. The controller adjusts the position of the tab appearance detection mechanism and the embossing mechanism according to the position signal and the appearance signal, and determines the embossing pressure of the embossing mechanism. The embossing mechanism embosses the tab area based on the control of the controller, which can improve the consistency of the embossing effect of the negative electrode die-cutting mechanism, automatically identify and process wrinkled materials, and reduce the labor and time costs of the production process.

[0059] Example 1

[0060] like Figure 1 As shown, this embodiment provides a die-cutting device for embossing reinforcing ribs, including an unwinding mechanism 1, a rewinding mechanism 2, a deviation correction mechanism 3, a tab appearance detection mechanism 4, an embossing mechanism 5, a die-cutting mechanism 6 and a controller.

[0061] The unwinding mechanism 1 , the correcting mechanism 3 , the embossing mechanism 5 , the die-cutting mechanism 6 and the winding mechanism 2 are arranged in sequence so that the pole piece 7 passes through in sequence, and the pole ear appearance detection mechanism 4 is arranged between the correcting mechanism 3 and the embossing mechanism 5 .

[0062] The deflection correction mechanism 3 is connected to the controller signal to obtain the position signal of the pole ear area 72 in the pole piece 7 and send it to the controller. The controller controls the deflection correction mechanism 3 to correct the pole piece 7 according to the position signal.

[0063] The tab appearance detection mechanism 4 is connected to the controller signal, and the detection area of ​​the tab appearance detection mechanism 4 covers at least part of the area between the correction mechanism 3 and the embossing mechanism 5, so as to obtain the appearance signal of the pole piece 7 and send it to the controller.

[0064] The embossing mechanism 5 and the die-cutting mechanism 6 are respectively connected to the controller signal. The controller controls the embossing state of the embossing mechanism 5 to emboss the pole piece 7 according to the position signal and the appearance signal, and controls the die-cutting state of the die-cutting mechanism 6 to die-cut the embossed pole piece 7 according to the appearance signal.

[0065] In a preferred embodiment, Figure 2 As shown, the pole piece 7 includes a coating area 71 and a lug area 72 . The lug areas 72 are respectively arranged at both ends of the coating area 71 . The embossing structure in the embossing mechanism 5 is prohibited from being applied to the coating area 71 .

[0066] In a preferred embodiment, the deflection correction mechanism 3 includes a sensor and a deflection correction execution module. The sensor is respectively connected to the deflection correction execution module and the controller signal, and the sensor is used to emit infrared light, visible light signal or ultrasonic wave to the pole ear area 72 in the pole piece 7 to obtain the position signal of the pole ear area 72 and convert it into an electrical signal and send it to the deflection correction execution module and the controller. The deflection correction execution module is used to correct the pole piece 7 based on the control of the controller, and then adjust the relative position between the deflection correction mechanism 3 and the pole ear area 72. Figure 3 As shown, it is a schematic diagram of the correction mechanism 3.

[0067] Specifically, the deviation-correcting mechanism 3 adopts a left-right dual-correction method, or may adopt a single-correction method that retains only the left side or the right side.

[0068] Specifically, the sensor may be a photoelectric sensor or an ultrasonic sensor.

[0069] Specifically, the position signal detected by the correction mechanism 3 is the coordinate signal of the pole lug area 72, which is used to maintain the position linkage between the correction mechanism 3 and the pole lug appearance detection mechanism 4 and the embossing mechanism 5, and to continuously correct the position fluctuation of the pole piece 7 during normal operation while keeping the relative positions of the three unchanged.

[0070] In a preferred embodiment, Figure 4 As shown, the tab appearance detection mechanism 4 includes a crossbar 41, a first reciprocating motor 42 and a wrinkle detection module 43. The crossbar 41 is connected to the output end of the first reciprocating motor 42, and two wrinkle detection modules 43 are arranged on the crossbar 41 at intervals. The wrinkle detection module 43 and the first reciprocating motor 42 are respectively connected to the controller signal, and the wrinkle detection module 43 is used to detect the number of wrinkles in the corresponding tab area 72, and output the appearance signal of the tab area 72 to the controller based on the number of wrinkles. The first reciprocating motor is used to drive the reciprocating motion of the crossbar 41 based on the control of the controller, and then control the two wrinkle detection modules 43 to move along the axial direction of the crossbar 41. Of course, the number of wrinkle detection modules 43 cannot be understood as a limitation.

[0071] Specifically, the wrinkle detection module 43 includes a CCD (charge coupled device) camera and a wrinkle degree determination unit. The CCD camera is used to obtain image data of the surface of the pole piece 7. The wrinkle degree determination unit is used to determine the number of wrinkles in the pole lug area 72 based on the image data of the pole lug area 72, and then determine the wrinkle degree of the corresponding pole lug area 72 according to a preset proportional relationship between the number of wrinkles and the wrinkle degree, and output an appearance signal of the pole lug area 72.

[0072] Specifically, the detection frequency of the wrinkle detection module 43 is continuous detection.

[0073] Specifically, the appearance signal includes a wrinkle degree signal and an actual tab width, wherein the wrinkle degree signal is a completeness percentage signal.

[0074] It should be noted that due to product differentiation, the proportional relationship between the number of pleats and the degree of pleats can be freely set according to the actual acceptable degree of pleats, and no further details will be given here.

[0075] In a preferred embodiment, Figure 5 As shown, the embossing mechanism 5 includes a conveying roller 51 for conveying the pole piece 7 and an embossing device 52 for embossing the pole piece 7. A gap is provided between the conveying roller 51 and the embossing device 52 for the pole piece 7 to pass through, and the embossing device 52 is also connected to the controller signal. The conveying roller 51 is used to convey the pole piece 7, and the embossing device 52 is used to emboss the pole ear area 72 on the pole piece 7 based on the control of the controller.

[0076] Specifically, a plurality of first rollers 53 are arranged between the conveying roller 51 and the die-cutting mechanism 6, for example Figure 5 The two first rollers 53 in the die-cutting mechanism 6 are used to guide the pole piece 7 into the die-cutting mechanism 6 because the pole piece 7 and the conveying roller 51 form a wrap angle during embossing. In theory, the larger the wrap angle, the better. Therefore, a plurality of first rollers 53 are provided to guide the pole piece 7 into the die-cutting mechanism 6.

[0077] Specifically, the conveying roller 51 includes a second roller 511 and a support 512, and the embossing device 52 includes a screw 521, a second reciprocating motor 522, an up-and-down lifting motor 523, and an embossing structure 524. The two ends of the second roller 511 are rotatably mounted on the support 512, and the second roller 511 is rollingly connected to the pole piece 7. The screw 521 is parallel to the second roller 511 and arranged at an interval, and the pole piece 7 passes through the interval. The two ends of the screw 521 are respectively fixedly connected to the output end of the second reciprocating motor 522, and the screw 521 is threadedly connected to two sliders, and each slider is respectively provided with an up-and-down lifting motor 523, and the output end of each up-and-down lifting motor 523 is respectively connected to an embossing structure 524, and the driving direction of the up-and-down lifting motor 523 intersects with the axial direction of the screw 521. Specifically, the driving direction of the up-and-down lifting motor 523 is perpendicular to the axial direction of the screw 521. Each second reciprocating motor 522 and the up-down lifting motor 523 are respectively connected to the controller signal, and each second reciprocating motor 522 is used to drive the screw rod 521 to rotate based on the control of the controller, and the rotational motion of the motor is converted into the linear motion of the slider by using a slider with thread matching, thereby driving the corresponding up-down lifting motor 523 on the slider to reciprocate along the axial direction of the screw rod 521 to adjust the embossing position of the corresponding embossing structure 524; each up-down lifting motor is used to drive the embossing structure 524 to move closer to or away from the plane of the pole piece 7 based on the control of the controller, and adjust the embossing pressure of the embossing structure 524 on the pole piece 7. Under the control of the second reciprocating motor 522, the embossing structure 524 can realize the position movement relative to the width direction of the pole lug 7 to emboss the pole lug area 72, and under the action of the up-down lifting motor 523, it can realize the movement closer to or away from the pole lug area 72 to adjust the embossing pressure, and under the action of the second reciprocating motor 522, the embossing position can be adjusted.

[0078] In a preferred embodiment, Figure 1 As shown, the die-cutting mechanism 6 includes a third roller 61 and a die-cutting machine 62. The third roller 61 is rolled to connect the pole piece 7. Corresponding to the position of the third roller 61, a die-cutting machine 62 is arranged above the pole piece 7. The die-cutting machine 62 is also electrically connected to the controller. The die-cutting machine 62 is used to die-cut the embossed pole piece 7 based on the control of the controller.

[0079] In a preferred embodiment, the controller includes a data acquisition module, a position adjustment amount determination module, an embossing pressure determination module, a die cutting speed determination module, an alarm module and a control module which are signal-connected to each other;

[0080] The data acquisition module is used to obtain the initial positions of the correction mechanism 3, the tab appearance detection mechanism 4 and the embossing mechanism 5, the pre-set embossing width, and the position signal determined by the correction mechanism 3 and the appearance signal determined by the tab appearance detection mechanism 4; the position signal is the coordinate signal of the tab area in the pole piece, and the appearance signal includes a wrinkle degree signal.

[0081] The position adjustment amount determination module is used to determine the position adjustment amount of the pole lug appearance detection mechanism 4 and the embossing mechanism 5 and the correction amount of the pole piece 7 by the correction mechanism 3 according to the position signal determined by the correction mechanism 3 and the initial positions of the correction mechanism 3, the pole lug appearance detection mechanism 4 and the embossing mechanism 5.

[0082] The embossing pressure determination module is used to determine the embossing pressure of the embossing mechanism 5 according to the wrinkle degree signal in the appearance signal determined by the tab appearance detection mechanism 4 .

[0083] The die-cutting speed determination module is used to determine the die-cutting speed of the die-cutting mechanism 6 according to the wrinkle degree signal in the appearance signal determined by the tab appearance detection mechanism 4 .

[0084] The alarm module is used to send out an alarm signal when the actual tab width in the appearance signal exceeds the preset embossing width.

[0085] The control module is connected to the correction mechanism 3, the tab appearance detection mechanism 4, the embossing mechanism 5 and the die-cutting mechanism 6 by signals, and is used to adjust the positions of the tab appearance detection mechanism 4 and the embossing mechanism 5 according to the position adjustment amount; adjust the embossing state of the embossing mechanism according to the embossing pressure; control the correction mechanism 3 to correct the pole piece 7 according to the correction amount; adjust the die-cutting state of the die-cutting mechanism according to the die-cutting speed; and control the unwinding mechanism 1, the winding mechanism 2, the correction mechanism 3, the tab appearance detection mechanism 4, the embossing mechanism 5 and the die-cutting mechanism 6 to close according to the alarm signal.

[0086] Example 2

[0087] This embodiment provides a die-cutting method for reinforcing rib embossing, comprising the following steps:

[0088] 1) In the initial state, the position signal obtained by the correction mechanism 3, the position of the tab appearance detection mechanism 4 and the position of the embossing mechanism 5 are all a(x1), a(x1) can be 0, the preset tab width of the tab area 72 in the pole piece 7 is H1, the embossing width is H2, and H1≥H2.

[0089] 2) The unwinding mechanism 1 unwinds and conveys the electrode 7 to be embossed.

[0090] 3) If Figure 6 As shown, the deviation correction mechanism 3 obtains the position signal of the pole ear area 72 in the pole piece 7 in real time, converts it into an electrical signal a(x2) and sends it to the controller.

[0091] Specifically, the sensor transmits infrared light, visible light signal or ultrasonic wave to the pole ear area 72 in the pole piece 7, obtains the position signal of the pole ear area 72, converts it into an electrical signal a(x2), and then sends it to the correction execution module and the controller.

[0092] 4) If Figure 6 As shown, the controller adjusts the relative positions of the tab appearance detection mechanism 4 and the embossing mechanism 5 and the tab area 72 in the pole piece 7 in real time according to the received position signal and the initial positions of the deviation correction mechanism 3, the tab appearance detection mechanism 4 and the embossing mechanism 5, and controls the deviation correction mechanism 3 to correct the pole piece 7, specifically:

[0093] 4.1) The data acquisition module acquires the initial positions a(x1) of the deviation correction mechanism 3, the tab appearance detection mechanism 4 and the embossing mechanism 5, as well as the position signal a(x2) determined by the deviation correction mechanism 3.

[0094] 4.2) The position adjustment amount determination module determines whether the position of the pole piece 7 needs to be corrected based on the position signal a(x2). If necessary, the correction amount of the pole piece 7 by the correction mechanism 3 is determined so that the relative position between the sensor and the pole ear area 72 is 0; otherwise, enter step 4.3).

[0095] 4.3) The position adjustment amount determination module determines the position adjustment amount a(x1)-a(x2) of the tab appearance detection mechanism 4 and the embossing mechanism 5 in real time according to the initial positions a(x1) of the deviation correction mechanism 3, the tab appearance detection mechanism 4 and the embossing mechanism 5 and the position signal a(x2) determined by the deviation correction mechanism 3;

[0096] 4.4) The control module adjusts the positions of the tab appearance detection mechanism 4 and the embossing mechanism 5 in real time according to the position adjustment amount a(x1)-a(x2).

[0097] Specifically, the control module adjusts the position of the cross bar 41 through the first reciprocating motor 42, and then controls the two wrinkle detection modules 43 to move along the width direction a(x1)-a(x2) of the pole piece 7, thereby adjusting the position of the pole ear appearance detection mechanism 4 to always align the pole ear area 72 for detection.

[0098] Specifically, the control module drives the screw rod 521 to rotate through the second reciprocating motor 522, and converts the rotational motion of the motor into linear motion of the slider by adopting a threaded slider, thereby driving the corresponding up and down lifting motor 523 on the slider to reciprocate along the axial direction of the screw rod 521, adjusting the relative position of the corresponding embossing structure 524 and the width direction of the pole piece 7, thereby realizing the adjustment of the position of the embossing mechanism 5, so that the embossing structure 524 can be aligned with the pole ear area 72 for embossing.

[0099] 5) The tab appearance detection mechanism 4 acquires the appearance signal of the tab area 72 in the pole piece 7 in real time at the current position and sends it to the controller.

[0100] Specifically, each CCD camera acquires image data of the surface of the pole piece 7 and sends it to the corresponding wrinkle degree determination unit, which determines the number of wrinkles in the corresponding pole lug area 72 based on the received image data, and then determines the wrinkle degree of the corresponding pole lug area 72 based on a preset proportional relationship between the number of wrinkles and the wrinkle degree, and outputs an appearance signal of the pole lug area 72 to the controller, wherein the appearance signal includes a wrinkle degree signal b and an actual pole lug width H3, 0≤b≤100%, H3≥H2.

[0101] For example, taking the length of the tab area 72 of 50 mm as the minimum unit, the number of wrinkles n with a length ≥ 5 mm within 50 mm is counted, and the process requires that the allowed number of wrinkles is 10, then the wrinkle degree m = n / 10*100%.

[0102] 6) The controller determines the embossing pressure of the embossing mechanism 5 in real time according to the received appearance signal, and controls the embossing mechanism 5 to emboss the tab area 72, specifically:

[0103] 6.1) The controller determines the embossing pressure of the embossing mechanism 5 in real time according to the received appearance signal.

[0104] Specifically, the embossing pressure F′ of the embossing mechanism 5 is adjusted to:

[0105] F′=F*b*k1

[0106] Among them, F is the embossing pressure before adjustment, and k1 is the correction coefficient, which is affected by product differentiation and needs to be determined during the actual equipment debugging process.

[0107] Specifically, usually, to meet production capacity requirements:

[0108] F*b*k1≥30%*F

[0109] 6.2) The controller adjusts the embossing structure 524 to perform lifting movement relative to the pole piece 7 through the up and down lifting motor 523, so that the embossing structure 524 reaches a certain embossing pressure to emboss the pole piece 7 to avoid cracking in the pole ear area 72.

[0110] 7) The controller determines the die-cutting speed of the die-cutting mechanism 6 in real time according to the received appearance signal, and adjusts the die-cutting state of the die-cutting mechanism 6 according to the die-cutting speed determined in real time, and controls the die-cutting mechanism 6 to die-cut and shape the embossed pole piece 7.

[0111] Specifically, the die-cutting speed V′ of the die-cutting mechanism 6 is adjusted to:

[0112] V′=V*b*k2

[0113] Among them, k2 is the correction coefficient, which is affected by product differentiation and needs to be determined during the actual equipment debugging process; V is the die-cutting speed before adjustment.

[0114] Specifically, usually, to meet production capacity requirements:

[0115] V′≥10m / min

[0116] 8) After die-cutting is completed, the winding mechanism rewinds the film.

[0117] In a preferred embodiment, the method further includes: when the actual tab width H3 in the appearance signal exceeds the preset embossing width H2, the controller controls the unwinding mechanism 1, the winding mechanism 2, the correcting mechanism 3, the tab appearance detection mechanism 4, the embossing mechanism 5 and the die-cutting mechanism 6 to close.

[0118] Specifically, the position signal obtained by the correcting mechanism 3 will continuously correct the position of the embossed structural part 524 to ensure the stability of the embossing width H2 and that the embossing will not be on the coating area 71. If H2>H3 or the stability of the embossing width H2 does not meet the specification requirements, the alarm module will send out an alarm signal, and the control module will control the unwinding mechanism 1, the winding mechanism 2, the correcting mechanism 3, the tab appearance detection mechanism 4, the embossing mechanism 5 and the die-cutting mechanism 6 to close according to the alarm signal.

[0119] The above embodiments are only used to illustrate the present invention, wherein the structure, connection mode and manufacturing process of each component may be changed. Any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A die-cutting device for embossing reinforcing ribs, characterized in that: It includes an unwinding mechanism, a rewinding mechanism, a deviation-correcting mechanism, a tab appearance detection mechanism, an embossing mechanism, a die-cutting mechanism and a controller; the unwinding mechanism, the deviation-correcting mechanism, the embossing mechanism, the die-cutting mechanism and the rewinding mechanism are arranged in sequence so that the tabs pass through in sequence; The deflection correction mechanism is connected to the controller signal to obtain the position signal of the pole ear area in the pole piece and send it to the controller, and the controller controls the deflection correction mechanism to correct the pole piece according to the position signal; The tab appearance detection mechanism is connected to the controller signal, and the detection area of ​​the tab appearance detection mechanism covers at least a part of the area between the deviation correction mechanism and the embossing mechanism, so as to obtain the appearance signal of the pole piece and send it to the controller; The embossing mechanism and the die-cutting mechanism are respectively connected to the controller signal, and the controller controls the embossing state of the embossing mechanism according to the position signal and the appearance signal to emboss the electrode piece, and controls the die-cutting state of the die-cutting mechanism according to at least the appearance signal to die-cut the embossed electrode piece; The controller includes a data acquisition module, a position adjustment amount determination module, an embossing pressure determination module, a die-cutting speed determination module and a control module which are mutually signal-connected; The data acquisition module is used to acquire the initial positions of the deflection correction mechanism, the tab appearance detection mechanism and the embossing mechanism, the preset embossing width, and the position signal determined by the deflection correction mechanism and the appearance signal determined by the tab appearance detection mechanism, wherein the position signal is a coordinate signal of the tab area in the pole piece, and the appearance signal includes a wrinkle degree signal; The position adjustment amount determination module is used to determine the position adjustment amount of the tab appearance detection mechanism and the embossing mechanism and the correction amount of the tab appearance detection mechanism on the pole piece according to the position signal and the initial positions of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism; The embossing pressure determination module is used to determine the embossing pressure of the embossing mechanism according to the wrinkle degree signal; The die-cutting speed determination module is used to determine the die-cutting speed of the die-cutting mechanism according to the wrinkle degree signal; The control module is signal-connected with the embossing mechanism, the deflection correction mechanism, the die-cutting mechanism and the tab appearance detection mechanism, so as to adjust the positions of the tab appearance detection mechanism and the embossing mechanism according to the position adjustment amount, adjust the embossing state of the embossing mechanism according to the embossing pressure, control the deflection correction mechanism to correct the pole piece according to the deflection correction amount, and adjust the die-cutting state of the die-cutting mechanism according to the die-cutting speed.

2. A die-cutting device for embossing reinforcing ribs as claimed in claim 1, characterized in that: The tab appearance detection mechanism comprises a crossbar, a first reciprocating motor and a wrinkle detection module; The wrinkle detection module is movably mounted on the cross bar, and the cross bar is connected to the output end of the first reciprocating motor, so as to reciprocate under the drive of the first reciprocating motor and drive the wrinkle detection module to move along the axial direction of the cross bar; The wrinkle detection module and the first reciprocating motor are respectively connected to the controller signal. The wrinkle detection module is used to detect the surface of the pole piece to obtain an appearance signal and transmit it to the controller; the controller controls the driving state of the first reciprocating motor according to the position signal to control the movement of the wrinkle detection module.

3. A die-cutting device for embossing reinforcing ribs as claimed in claim 1, characterized in that: The embossing mechanism comprises an embossing device, and the embossing device comprises a screw rod, a second reciprocating motor, an up and down lifting motor and an embossing structural member; The up and down lifting motor is movably connected to the screw rod, the output end of the second reciprocating motor is fixedly connected to the screw rod to drive the up and down lifting motor to move along the axial direction of the screw rod, and the output end of the up and down lifting motor is connected to the embossing structure to drive the embossing structure to move in a direction intersecting with the screw rod.

4. A die-cutting device for embossing reinforcing ribs as claimed in claim 3, characterized in that: The embossing mechanism also includes a conveying roller for conveying the electrode sheet; The conveying roller is parallel to the screw rod and is arranged alternately.

5. A die-cutting device for embossing reinforcing ribs as claimed in claim 1, characterized in that: The controller also includes an alarm module connected to the control module signal; The appearance signal determined by the tab appearance detection mechanism also includes an actual tab width. The alarm module is used to send out an alarm signal when the actual tab width exceeds a preset embossing width. The control module controls the unwinding mechanism, the winding mechanism, the deviation correction mechanism, the tab appearance detection mechanism, the embossing mechanism and the die-cutting mechanism to close according to the alarm signal.

6. A die-cutting method for reinforcing rib embossing, characterized in that: include: The unwinding mechanism unwinds and conveys the electrode to be embossed; The deviation correction mechanism obtains the position signal of the pole ear area in the pole piece in real time and converts it into an electrical signal and sends it to the controller; The controller adjusts the relative positions of the tab appearance detection mechanism and the embossing mechanism and the tab area in the pole piece according to the received position signal and the initial positions of the deviation correction mechanism, the tab appearance detection mechanism and the embossing mechanism, and controls the deviation correction mechanism to correct the deviation of the pole piece; The tab appearance detection mechanism obtains the appearance signal of the tab area in the pole piece in real time at the current position and sends it to the controller; The controller determines the embossing state of the embossing mechanism and the die-cutting state of the die-cutting mechanism according to the received appearance signal, and controls the embossing mechanism to emboss the pole ear area, and controls the die-cutting mechanism to die-cut the embossed pole piece; The winding mechanism winds up the die-cut pole piece; The controller adjusts the relative positions of the tab appearance detection mechanism and the embossing mechanism and the tab area in the pole piece according to the received position signal and the initial positions of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism, and controls the correction mechanism to correct the tab, including: The data acquisition module acquires the initial positions a(x1) of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism, and the position signal a(x2) determined by the correction mechanism, which is the coordinate signal of the tab area; The position adjustment amount determination module determines the correction amount of the electrode piece by the correction mechanism according to the initial positions a(x1) of the correction mechanism, the tab appearance detection mechanism and the embossing mechanism and the position signal a(x2) determined by the correction mechanism, and calculates the position adjustment amount a(x1)-a(x2) of the tab appearance detection mechanism and the embossing mechanism; The control module adjusts the relative position of the wrinkle detection module in the pole lug appearance detection mechanism and the pole lug area in the pole piece in real time through the first reciprocating motor in the pole lug appearance detection mechanism according to the position adjustment amount a(x1)-a(x2), and adjusts the relative position of the embossing structure in the embossing mechanism and the pole lug area in the pole piece in real time through the second reciprocating motor in the embossing mechanism.

7. A die-cutting method for embossing reinforcing ribs as claimed in claim 6, characterized in that: The tab appearance detection mechanism acquires the appearance signal of the tab area in the pole piece in real time and sends it to the controller, including: The wrinkle detection module detects the number of wrinkles on the surface of the pole piece, and outputs an appearance signal of the pole ear to the controller based on the number of wrinkles, wherein the appearance signal includes a wrinkle degree signal b, wherein 0≤b≤100%.

8. A die-cutting method for embossing reinforcing ribs as claimed in claim 7, characterized in that: The controller determines the embossing pressure F of the embossing mechanism in real time according to the received appearance signal. ′ for: F′=F*b*k1 Among them, F is the embossing pressure before adjustment, and k1 is the correction coefficient.

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