Online testing device and method for nailing resistance of guide pin of nailing winding machine

Abstract

The invention is suitable for the technical field of lithium battery production, and provides an online testing device and method for the nailing resistance of a guide pin of a nailing winding machine. The on-line testing device for the pin connection resistance of the guide pin of the pin connection winding machine comprises a resistance value detection mechanism, a shearing mechanism and a winding mechanism along the movement path of a pole piece. After the winding mechanism completes a winding process, the pole piece can be cut off from the preset position through the shearing mechanism, and the resistance value detection mechanism is in contact with the tab of the pole piece before the shearing mechanism cuts off the pole piece, so that the contact resistance of the tab is detected. According to the utility model, the detection of the contact resistance of the tab can be completed while the pole piece is wound, and unqualified products can be directly removed according to the detection result after the winding mechanism finishes winding, so that the step of detecting the contact resistance of the tab is reduced, the detection of the contact resistance of the lithium battery tab is more convenient, and the production efficiency of the lithium battery is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery production, and in particular relates to an online testing device and method for the guide pin stapling resistance of a stapling winding machine. Background Art

[0002] Lithium battery is a battery with high energy density and good environmental performance. It has the advantages of high energy, high reliability and good processability. Therefore, it is widely used in various portable electronic devices, electric vehicles, energy storage power stations and other electrical equipment. At present, capacitive lithium batteries are mainly composed of battery cells and outer packaging, in which the battery cells are wound with positive and negative electrodes and diaphragms. Before the electrode sheets are wound, the pole ears need to be installed on the pole sheets to facilitate the connection of the wound lithium battery with the external circuit. In the production process of lithium batteries, it is necessary to detect the resistance at the pole ears to ensure the quality of the pole ear installation. However, the current existing lithium battery pole ear contact resistance test method is usually that the staff transfers the lithium battery to the aging machine after winding and completes the test through the resistance testing mechanism on the aging machine, resulting in the problem of complex steps and low work efficiency in the contact resistance test of the lithium battery pole ears, which seriously affects the production efficiency of lithium batteries. Summary of the invention

[0003] The purpose of the present invention is to provide an online testing device and method for the guide pin resistance of a pinning winding machine, aiming to solve the technical problem of complicated test steps for the guide pin resistance of lithium batteries in the prior art.

[0004] The present invention is implemented as follows. In a first aspect, a device for online testing the resistance of a pin-stitching winding machine is provided, which is used to detect the resistance of a pole ear, and includes a resistance detection mechanism, a shearing mechanism and a winding mechanism. The winding mechanism is used to wind the pole piece, and the shearing mechanism is used to cut the pole piece from a preset position after the winding mechanism completes the winding of the pole piece. The resistance detection mechanism is used to contact the pole ear of the pole piece before the shearing mechanism cuts off the pole piece, and detect the resistance of the pole ear.

[0005] In an optional embodiment, the online testing device for the guide pin stapling resistance of the stapling winding machine also includes a control unit and a resistance display unit, the signal output end of the resistance detection mechanism is electrically connected to the resistance display unit, the resistance display unit is used to display the resistance value of the tab, and the resistance display unit is electrically connected to the control unit.

[0006] In an optional embodiment, the resistance detection mechanism includes a first detection group and a second detection group, and the first detection group and the second detection group are spaced apart along the path of movement of the pole piece. Along the path of movement of the pole piece, a first adjustment mechanism is arranged between the first detection group and the second detection group, and the first adjustment mechanism is used to adjust the length of the pole piece between the first detection group and the second detection group so that the spacing between the first detection group and the second detection group along the path of movement of the pole piece matches the spacing between the pole ears on the pole piece.

[0007] In an optional embodiment, a second adjustment mechanism is provided between the second detection group and the winding mechanism, and the second adjustment mechanism is used to adjust the length of the pole piece between the second detection mechanism and the winding mechanism so that the spacing between the second detection group and the winding mechanism along the pole piece movement path matches the spacing between the pole ears.

[0008] In an optional embodiment, the first adjustment mechanism and the second adjustment mechanism both include a fixed roller, a movable roller and a translation assembly, the movable roller and the fixed roller are used to wind the pole piece, the movable roller is arranged parallel to the fixed roller, the movable roller has the freedom to move along a direction perpendicular to its own axis relative to the fixed roller, and the translation assembly is used to adjust the distance between the movable roller and the fixed roller.

[0009] In an optional embodiment, the translation assembly includes a sliding bracket and a translation slider, the movable roller is rotatably arranged on the translation slider, a sliding structure is arranged on the sliding bracket, the translation slider is slidingly connected to the sliding bracket through the sliding structure, and adjusts the position of the movable roller by its own movement.

[0010] In an optional embodiment, the sliding structure includes a sliding groove, which is arranged on the sliding bracket. An adjusting pin that can slide along the length direction of the sliding groove is passed through the sliding groove. One end of the adjusting pin is movably connected to the translation slider, and the other end abuts against a side of the sliding bracket away from the translation slider.

[0011] In an optional embodiment, the first detection mechanism and the second detection mechanism both include a detection bracket, a detection slider, a driving unit, a resistance detection unit and a supporting component, the detection slider is movably arranged on the detection bracket, and the supporting component and the detection slider are arranged opposite to each other, and the supporting component and the detection slider are respectively located on both sides of the pole piece, the driving unit is arranged on the detection bracket, and the driving end is connected to the detection slider, the driving unit is used to drive the detection slider to approach or move away from the supporting component, and the resistance detection unit is arranged on the side of the detection slider facing the supporting component.

[0012] In an optional embodiment, the resistance detection unit has a test plane, and the test plane is used to abut against the tab.

[0013] In a second aspect, a method for online testing lead resistance of a nail winding machine is provided, comprising the following steps:

[0014] Adjust the length of the pole piece between the resistance detection mechanism and the winding mechanism so that after the winding mechanism completes a winding process, the resistance detection mechanism corresponds to the position of one of the pole ears on the pole piece;

[0015] The winding mechanism winds the pole piece, and the pole piece stops moving after completing a winding process. The shearing mechanism cuts off the pole piece from a preset position after the winding mechanism completes the winding of the pole piece. The resistance detection mechanism contacts the pole ear of the pole piece before the shearing mechanism cuts off the pole piece to detect the resistance of the pole ear.

[0016] Defective products after winding are rejected according to the measurement results of the resistance detection mechanism.

[0017] The technical effect of the first aspect of the present invention relative to the prior art is: by arranging a resistance detection mechanism, a shearing mechanism and a winding mechanism along the path of movement of the pole piece. After the winding mechanism completes a winding process, the pole piece can be cut off from a preset position by the shearing mechanism, and the resistance detection mechanism is in contact with the pole piece's lug before the shearing mechanism cuts off the pole piece, so as to detect the contact resistance of the pole piece. Compared with the prior art method of transporting the lithium battery to an aging machine after the lithium battery is wound and formed, and completing the test through the resistance testing mechanism on the aging machine, the present pin-stitching resistance online testing device for the stapling winding machine can complete the detection of the contact resistance of the pole piece while the pole piece is being wound, and can directly remove unqualified products according to the test results after the winding mechanism is wound, thereby reducing the steps of detecting the contact resistance of the pole piece, making the detection of the contact resistance of the lithium battery pole piece more convenient, thereby improving the production efficiency of the lithium battery.

[0018] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1Schematic diagram of an online testing device for the guide pin stapling resistance of a stapling winding machine provided by an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of a circuit connection diagram of an online testing device for the guide pin stapling resistance of a stapling winding machine provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of a first detection group used in an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of a detection slider and a resistance detection unit used in an embodiment of the present invention;

[0024] Figure 5 is a schematic structural diagram of a first adjustment mechanism used in an embodiment of the present invention;

[0025] Figure 6 The present invention provides a flowchart of an online testing method for lead resistance of a nail winding machine.

[0026] Description of reference numerals:

[0027] 1. Resistance detection mechanism; 2. Cutting mechanism; 3. Winding mechanism; 4. First adjustment mechanism; 41. Fixed roller; 42. Movable roller; 43. Translation assembly; 431. Sliding bracket; 432. Translation slider; 433. Sliding structure; 4331. Sliding slot; 434. Adjustment pin; 5. Second adjustment mechanism; 6. First detection group; 61. Detection bracket; 62. Detection slider; 63. Driving unit; 64. Resistance detection unit; 641. Detection plane; 65. Resistance test pair; 651. Resistance test sheet; 652. Insulation pad; 643. Support plate; 66. Guide structure; 7. Second detection group; 8. Control unit; 9. Resistance display unit. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Please refer to Figure 1 As shown, in an embodiment of the present invention, in the first aspect, there is provided an online testing device for the guide pin stapling resistance of a stapling winding machine, which is used to detect the resistance of the pole ear, and includes a resistance detection mechanism 1, a shearing mechanism 2 and a winding mechanism 3 along the movement path of the pole piece. The winding mechanism 3 is used to wind the pole piece, and the shearing mechanism 2 is used to cut the pole piece from a preset position after the winding mechanism 3 completes the winding of the pole piece. The resistance detection mechanism 1 is used to contact the pole ear of the pole piece before the shearing mechanism 2 cuts off the pole piece, and detect the resistance of the pole ear.

[0034] Specifically, the resistance detection mechanism 1 refers to a component or assembly for detecting the contact resistance of the pole ear on the pole piece. The resistance detection mechanism 1 can generally include a detection part and a driving part for driving the detection part to move. When detection is required, the detection part can be driven by the driving part to contact the pole ear on the pole piece, and when detection is not required, the detection part can be driven by the driving part to move away from the pole piece. The shearing mechanism 2 refers to a device or assembly for cutting off the pole piece. The winding mechanism 3 refers to a device for winding the pole piece with pole pieces of other polarities and a diaphragm. It should be noted that the shearing mechanism 2 may include two relatively movable parts, and the pole piece is sheared by squeezing the edges of the two parts against each other. The specific structure and working principle of the winding mechanism 3 are commonly used technical means in the field, and will not be repeated here. In addition, in order to ensure the compactness of the overall structure, the resistance detection mechanism 1, the shearing mechanism 2 and the winding mechanism 3 can all be arranged on the same support plate.

[0035] The on-line test device for the pin-jointing resistance of the pin-jointing winding machine provided in the embodiment of the present invention is provided with a value detection mechanism, a shearing mechanism 2 and a winding mechanism 3 along the moving path of the pole piece. After the winding mechanism 3 completes a winding process, the pole piece can be cut off from a preset position by the shearing mechanism 2, and before the shearing mechanism 2 cuts off the pole piece, the resistance detection mechanism 1 contacts the pole ear of the pole piece to detect the contact resistance of the guide pin. Compared with the method in the prior art in which the lithium battery is transported to the aging machine after the lithium battery is wound and formed, and the test is completed by the resistance testing mechanism on the aging machine, the on-line test device for the pin-jointing resistance of the pin-jointing winding machine can complete the detection of the contact resistance of the guide pin while the pole piece is wound, and can directly remove unqualified products according to the detection results after the winding mechanism 3 completes the winding, thereby reducing the steps of detecting the contact resistance of the guide pin, making the detection of the contact resistance of the lithium battery guide pin more convenient, and improving the production efficiency of the lithium battery.

[0036] It should be noted that the time that the resistance detection mechanism 1 contacts the electrode is a few milliseconds, and there is a time interval between the resistance detection mechanism 1 measuring the guide needle of the electrode and the shearing mechanism 2 cutting off the electrode from the preset position. This time interval is also a few milliseconds. It is necessary to ensure that when the resistance detection mechanism 1 measures the resistance of the electrode, the electrode is in an uncut state.

[0037] In one embodiment, please refer to 2, the online testing device for the guide pin of the nail winding machine also includes a control unit 8 and a resistance display unit 9, the signal output end of the resistance detection mechanism 1 is electrically connected to the resistance display unit 9, and the resistance display unit 9 is electrically connected to the control unit 8, and the resistance display unit 9 is used to display the resistance value of the guide pin. Specifically, the control unit 8 refers to an electrical component used to calculate and execute control quality. The control unit 8 can be a single unit such as a PLC (Programmable Logic Controller) or an MCU (Microcontroller Unit), and the control unit 8 can also directly use components such as an industrial computer. The resistance display unit 9 refers to a component or assembly that can display an electrical signal. The resistance display unit 9 can use a liquid crystal display, a cathode ray tube, a plasma display, or an electronic ink display. In this embodiment, by connecting the signal output end of the resistance detection mechanism 1 to the resistance display unit 9, the data detected by the resistance detection mechanism 1 can be displayed through the resistance display unit 9, so that the detection value of the resistance detection mechanism 1 is more intuitive. At the same time, the resistance display unit 9 is electrically connected to the control unit 8. The control unit 8 can obtain the resistance value at the resistance display unit 9 and control the actuator to work according to the resistance value. For example, when the resistance detection of the guide needle is unqualified, the rejection mechanism is controlled to reject the unqualified product from the winding mechanism.

[0038] In an alternative embodiment, see Figure 2 The control unit 8 can also be electrically connected to the control end of the defective material return mechanism. After the resistance detection mechanism 1 detects that the contact resistance of the guide needle is unqualified, the control unit 8 can control the defective material return mechanism to reject the wound product, thereby ensuring the quality of the product.

[0039] In one embodiment, see Figure 1 The resistance detection mechanism 1 includes a first detection group 6 and a second detection group 7. The first detection group 6 and the second detection group 7 are arranged at intervals along the path of movement of the pole piece. A first adjustment mechanism 4 is arranged between the first detection group 6 and the second detection group 7 along the path of movement of the pole piece. The first adjustment mechanism 4 is used to adjust the length of the pole piece between the first detection group 6 and the second detection group 7 so that the spacing between the first detection group 6 and the second detection group 7 along the path of movement of the pole piece matches the spacing of the guide needles on the pole piece.

[0040] Specifically, the first detection group 6 and the second detection group 7 both refer to components or assemblies for detecting the resistance of the guide needle, which can generally include a detection part and a driving part for driving the detection part to move, and the detection part can be driven by the driving part to contact the guide needle on the pole piece when detection is required, and the detection part can be driven by the driving part to move away from the pole piece when detection is not required. The first adjustment mechanism 4 refers to a component or assembly for adjusting the length of the pole piece along the pole piece movement path, which can be adjusted manually or automatically.

[0041] In this embodiment, the resistance detection mechanism 1 includes a first detection group 6 and a second detection group 7, and the first detection group 6 and the second detection group 7 are arranged at intervals along the path of the pole piece movement. After the first detection group 6 detects a guide needle on the pole piece, the second detection group 7 can be used to perform a secondary detection on the guide needle, thereby improving the accuracy of the guide needle contact resistance detection. It is also possible to detect the contact resistance of part of the guide needles on the pole piece through the first detection group 6, and at the same time detect the contact resistance of another part of the guide needles on the pole piece through the second detection group 7. The first detection group 6 and the second detection group 7 work simultaneously, thereby improving the overall detection efficiency.

[0042] In addition, a first adjustment mechanism 4 is provided between the first detection group 6 and the second detection group 7, and when the specification of the electrode is changed, resulting in a change in the spacing of the guide needles on the electrode, the length of the electrode between the first detection group 6 and the second detection group 7 can be adjusted by the first adjustment mechanism 4, so that the spacing between the first detection group 6 and the second detection group 7 along the electrode movement path matches the spacing of the guide needles on the electrode, so that when one guide needle on the electrode stays at a position matching the first detection group 6 (that is, a position directly opposite to the detection part on the first detection group 6), the other guide needle on the electrode will also stay at a position matching the second detection group 7 (that is, a position directly opposite to the detection part on the second detection group 7), wherein the two guide needles can be adjacent, and a number of other guide needles can be spaced between the two guide needles. Thus, when the first detection group 6 is working, the second detection group 7 can also work at the same time, which improves the efficiency of the guide needle resistance detection and the applicability of the equipment.

[0043] In one embodiment, see Figure 1, a second adjustment mechanism 5 is provided between the second detection group 7 and the winding mechanism 3, and the second adjustment mechanism 5 is used to adjust the length of the pole piece between the second detection group 7 and the winding mechanism 3, so that the spacing between the second detection group 7 and the winding mechanism 3 along the pole piece movement path matches the spacing of the guide needles. Specifically, the second adjustment mechanism 5 refers to a component or assembly used to adjust the length of the pole piece along the pole piece movement path. In this embodiment, along the pole piece movement path, by providing a second adjustment mechanism 5 between the second detection group 7 and the winding mechanism 3, the second adjustment mechanism 5 can adjust the length of the pole piece between the second detection mechanism and the winding mechanism 3, so that the spacing between the second detection group 7 and the winding mechanism 3 along the pole piece movement path matches the spacing of the guide needles, and then when the winding mechanism 3 completes a winding process, one of the guide needles will also stay at a position matching the second detection group 7, that is, a position directly opposite to the detection part on the second detection group 7. When the specification of the pole piece is changed, resulting in a change in the spacing of the guide needles on the pole piece, the length of the pole piece between the second detection mechanism and the winding mechanism 3 can be adjusted to ensure that when the winding mechanism 3 stops working during a winding process, there is always a guide needle arranged opposite to the second detection group 7, thereby improving the applicability of the equipment.

[0044] In one embodiment, see Figure 5, the first adjustment mechanism 4 and the second adjustment mechanism 5 both include a fixed roller 41, a movable roller 42 and a translation assembly 43. The movable roller 42 and the fixed roller 41 are wound with pole pieces. The movable roller 42 and the fixed roller 41 are arranged in parallel. The movable roller 42 has the freedom to move along an axis perpendicular to its own axis relative to the fixed roller 41. The translation assembly 43 is used to adjust the distance between the movable roller 42 and the fixed roller 41. Specifically, the translation assembly 43 refers to a component or assembly used to adjust the position of an object. The fixed roller 41 and the movable roller 42 are both shaft-shaped components with a certain diameter. The position of the fixed roller 41 is relatively fixed, but the fixed roller 41 can be rotatably set on the support plate. The movable roller 42 can be rotatably set on the adjustment end of the translation assembly 43. In this embodiment, by arranging the movable roller 42 and the fixed roller 41 in parallel, and the movable roller 42 has the freedom to move perpendicular to its own axis relative to the fixed roller 41, the pole piece can be wound on the movable roller 42 and the fixed roller 41 respectively when in use. When it is necessary to increase the length of the pole piece wound on the first adjustment mechanism 4 or the second adjustment mechanism 5, the distance between the movable roller 42 and the fixed roller 41 can be increased by the translation component 43, so that a longer pole piece can be wound between the movable roller 42 and the fixed roller 41. When it is necessary to reduce the length of the pole piece wound on the first adjustment mechanism 4 or the second adjustment mechanism 5, the distance between the movable roller 42 and the fixed roller 41 can be reduced by the translation component 43, so that the pole piece that can be wound between the movable roller 42 and the fixed roller 41 is shorter. By adopting the above-mentioned structural method, the first adjustment mechanism 4 and the second adjustment mechanism 5 can make it more convenient to adjust the length of the pole piece between the two components.

[0045] In an alternative embodiment, see Figure 5 The number of fixed rollers 41 and movable rollers 42 can be multiple, wherein multiple movable rollers 42 can be arranged at intervals along the first direction, and multiple fixed rollers 41 can also be arranged at intervals along the first direction. At the same time, the movable rollers 42 and the fixed rollers 41 can be arranged at intervals along the second direction, and the first direction and the second direction are arranged at an angle. By setting multiple movable rollers 42 and multiple fixed rollers 41, more pole pieces can be wound on the first adjustment mechanism 4 or the second adjustment mechanism 5, and when the movable roller 42 moves relative to the fixed roller 41, the length of the pole piece can be adjusted faster, thereby improving the adjustment efficiency.

[0046] In one embodiment, see Figure 5The translation assembly 43 includes a sliding bracket 431 and a translation slider 432. The movable roller shaft 42 is rotatably arranged on the translation slider 432. The sliding bracket 431 is provided with a sliding structure 433. The translation slider 432 is slidably connected to the sliding bracket 431 through the sliding structure 433, and adjusts the position of the movable roller shaft 42 by its own movement. Specifically, the sliding bracket 431 refers to a supporting component with a certain length. The sliding bracket 431 can be a block, a plate, or a combination of multiple shapes. The translation slider 432 refers to a component with a certain volume. The translation slider 432 can be a block, a plate, or a combination of multiple shapes. The sliding structure 433 refers to a component or assembly that can slide and connect two objects. The sliding structure 433 can be a slider guide structure, a roller guide structure, etc. In this embodiment, the translation slider 432 is slidably connected to the sliding bracket 431 through the sliding structure 433, and the movable shaft is set on the translation slider 432. When the position of the movable shaft needs to be adjusted, the position of the movable roller 42 can be moved and adjusted by the translation slider 432, making the position adjustment of the movable roller 42 more convenient and quick.

[0047] In one embodiment, see Figure 5 The sliding structure 433 includes a sliding groove 4331, which is arranged on the sliding bracket 431. An adjusting pin 434 is inserted into the sliding groove 4331 and can slide along the length direction of the sliding groove 4331. One end of the adjusting pin 434 is movably connected to the translation slider 432, and the other end abuts against the side of the sliding bracket 431 away from the translation slider 432. Specifically, the sliding groove 4331 refers to a through groove structure with a certain length, and the adjusting pin 434 refers to a columnar structure with a certain length. In this embodiment, one end of the adjusting pin 434 is movably connected to the translation slider 432, and the other end abuts against the side of the sliding bracket 431 away from the translation slider 432. When the position of the translation slider 432 needs to be adjusted, the position of the adjusting pin 434 can be adjusted to make the end of the adjusting pin 434 away from the sliding bracket 431, so that the adjusting pin 434 and the translation slider 432 can slide along the length direction of the sliding groove 4331. After the position is adjusted to the right position, the position of the adjusting pin 434 can be adjusted to make the end of the adjusting pin 434 abut against the side of the sliding bracket 431 away from the translation slider 432, so as to fix the translation slider 432. The cooperation between the sliding groove 4331 and the adjusting pin 434 makes it more convenient to adjust and fix the position of the translation slider 432.

[0048] In an alternative embodiment, see Figure 5, the adjusting pin 434 is threadedly connected to the translation slider 432. Specifically, a mounting hole for accommodating the adjusting pin 434 is provided on the translation slider 432, and threads are provided on the inner wall of the mounting hole and the outer part of the adjusting pin 434, so that the adjusting pin 434 can be threadedly connected to the translation slider 432. By threading the adjusting pin 434 to the translation slider 432, when the relative position between the translation slider 432 and the adjusting pin 434 needs to be adjusted, the adjusting pin 434 can be adjusted in the direction of its own axis by simply rotating the adjusting pin 434.

[0049] In one embodiment, see Figure 3 The first detection mechanism and the second detection mechanism both include a detection bracket 61, a detection slider 62, a driving unit 63, a resistance detection unit 64 and a resistance test pair 65. The detection slider 62 is movably arranged on the detection bracket 61, and the resistance test pair 65 is arranged opposite to the detection slider 62, and the resistance test pair 65 and the detection slider 62 are respectively located on both sides of the pole piece. The driving unit 63 is arranged on the detection bracket 61, and the driving end is connected to the detection slider 62. The driving unit 63 is used to drive the detection slider 62 to approach or move away from the resistance test pair 65. The resistance detection unit 64 is arranged on the side of the detection slider 62 facing the resistance test pair 65.

[0050] Specifically, the detection bracket 61 refers to a supporting component with a certain height, and the detection bracket 61 can be a block, a plate, or a combination of multiple shapes. The detection slider 62 refers to a component with a certain volume, and the detection slider 62 is usually a block or a plate. The driving unit 63 refers to a component or assembly used to drive an object to move in a straight line direction. The driving unit 63 can be a cylinder, a hydraulic cylinder, or an electric push rod, etc. The body of the driving unit 63 can be fixed on the detection bracket 61 and the driving end is connected to the detection slider 62. The resistance detection unit 64 refers to an electrical component used to detect the contact resistance at the guide needle, and the resistance detection unit 64 can be a resistance test electrode. The detection slider 62 is usually an insulating material component, which can electrically isolate the resistance detection unit 64, making the use of the resistance detection unit 64 safer. The resistance test pair 65 refers to a component with a certain volume, and the resistance test pair 65 can be a block, a plate, or a combination of multiple shapes, and there is usually a support plane on the resistance test pair 65.

[0051] In this embodiment, by arranging the detection slider 62 and the resistance test pair 65 on both sides of the electrode, when the contact resistance of the guide needle needs to be tested, the detection slider 62 can be driven by the driving unit 63 to approach the resistance test pair 65, and the electrode and the guide needle are pressed against the resistance test pair 65, so that the resistance detection unit 64 can contact the guide needle to measure the contact resistance, and when the measurement is not needed, the detection slider 62 is driven by the driving unit 63 to move away from the resistance test pair 65, so that the electrode can move normally. This makes the measurement of contact resistance more convenient.

[0052] In one embodiment, see Figure 3 The resistance test pair 65 includes a support plate 653, a resistance test piece 651 and an insulating pad 652. The resistance test piece 651 is arranged on the side of the support plate 653 facing the detection slider 62, and the insulating pad 652 is arranged between the resistance test piece and the support plate 653. Specifically, the support plate 653 refers to a plate-like component with a certain volume. The resistance test piece 651 refers to a plate-like or sheet-like component with a certain area. The resistance test piece 651 can also play a role in testing resistance, and can be measured simultaneously with the resistance detection unit 64, so as to play a role in verification or ensuring that the measurement can continue when the resistance detection unit 64 fails. The insulating pad 652 refers to an insulating component with a certain volume. In this embodiment, by arranging the insulating component 652 between the resistance test piece 651 and the support plate 653, it is possible to avoid the phenomenon of leakage of the resistance test piece 651 during operation, making the use of the resistance test piece safer.

[0053] In an alternative embodiment, see Figure 3 A guide structure 66 may be further provided between the detection slider 62 and the detection bracket 61, wherein the guide structure 66 includes a linear bearing provided on the detection bracket 61 and a guide column at one end connected to the detection slider 62 and the other end slidably inserted into the linear bearing. By providing the guide structure 66, the sliding of the detection slider 62 may be made smoother, and the accuracy of the guide needle contact resistance detection may also be improved.

[0054] In one embodiment, see Figure 4 The resistance detection unit 64 has a test plane, which is used to contact the guide needle. Specifically, the test plane refers to a planar structure with a certain area. By providing the test plane on the resistance detection unit 64, the contact area between the resistance detection unit 64 and the guide needle can be increased, thereby improving the stability of the resistance detection unit 64 during measurement and also improving the accuracy of the measurement.

[0055] Second, see Figure 6 , provides an online test method for lead resistance of a nail winding machine, comprising the following steps:

[0056] S1. Adjust the length of the electrode between the resistance detection mechanism 1 and the winding mechanism 3 so that after the winding mechanism 3 completes a winding process, the resistance detection mechanism 1 corresponds to the position of one of the guide pins on the electrode.

[0057] Specifically, the length of the pole piece can be adjusted by setting a second adjustment mechanism 5 between the resistance detection mechanism 1 and the winding mechanism 3, or the length of the pole piece between the resistance detection mechanism 1 and the winding mechanism 3 can be adjusted by adjusting the position of the winding mechanism 3 or the resistance detection mechanism 1 itself.

[0058] S2, the winding mechanism 3 winds the electrode piece, and the electrode piece stops moving after completing a winding process, the shearing mechanism 2 cuts the electrode piece from a preset position after the winding mechanism 3 completes the winding of the electrode piece, and the resistance detection mechanism 1 contacts the guide needle of the electrode piece when the shearing mechanism 2 cuts the electrode piece to detect the resistance of the guide needle.

[0059] Specifically, the time for the pole piece to stop moving after the winding mechanism 3 completes a winding process is about a few milliseconds. During this time period, the resistance measurement and the pole piece cutting from the preset position need to be completed successively. Among them, the time for the resistance detection mechanism 1 to contact the pole piece is a few milliseconds, and there is a time interval between the resistance detection mechanism 1 measuring the guide needle of the pole piece and the cutting mechanism 2 cutting the pole piece from the preset position. This time interval is also a few milliseconds. It is necessary to ensure that when the resistance detection mechanism 1 measures the resistance of the pole piece, the pole piece is in an uncut state. .

[0060] S3. According to the measurement result of the resistance detection mechanism 1, the defective products after winding are removed.

[0061] Specifically, defective products containing defective guide pins (ie, guide pins with a resistance value that is too large during measurement) can be rejected by the defective product rejection mechanism, and the defective products can be placed in a recycling container.

[0062] In this embodiment, after the winding mechanism 3 completes a winding process, the electrode sheet can be cut off from a preset position by the shearing mechanism 2, and after the electrode sheet is cut off by the shearing mechanism 2, the resistance detection mechanism 1 contacts the guide pin of the electrode sheet to detect the contact resistance of the guide pin. Compared with the prior art method of transporting the lithium battery to the aging machine after the lithium battery is wound and formed, and completing the test through the resistance testing mechanism on the aging machine, the present nailing winding machine guide pin nailing resistance online testing device can complete the detection of the contact resistance of the guide pin while the electrode sheet is wound, and can directly remove unqualified products according to the test results after the winding mechanism 3 completes the winding, reducing the steps of the guide pin contact resistance detection, making the detection of the contact resistance of the lithium battery guide pin more convenient, improving the production efficiency of lithium batteries, and also improving the adaptability of the equipment.

[0063] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An online testing device for the resistance of a guide pin of a nailing winding machine, used to detect the resistance of a tab, characterized in that: The path along which the pole piece moves includes a resistance detection mechanism, a shearing mechanism and a winding mechanism. The winding mechanism is used to wind the pole piece. The shearing mechanism is used to cut the pole piece from a preset position after the winding mechanism completes winding the pole piece. The resistance detection mechanism is used to contact the pole ear of the pole piece before the shearing mechanism cuts off the pole piece and detect the resistance of the pole ear.

2. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 1, characterized in that: It also includes a control unit and a resistance display unit. The signal output end of the resistance detection mechanism is electrically connected to the resistance display unit. The resistance display unit is used to display the resistance value of the tab, and the resistance display unit is electrically connected to the control unit.

3. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 1 or 2, characterized in that: The resistance detection mechanism includes a first detection group and a second detection group, and the first detection group and the second detection group are spaced apart along the path of movement of the pole piece. A first adjustment mechanism is provided between the first detection group and the second detection group along the path of movement of the pole piece, and the first adjustment mechanism is used to adjust the length of the pole piece between the first detection group and the second detection group so that the spacing between the first detection group and the second detection group along the path of movement of the pole piece matches the spacing between the pole ears on the pole piece.

4. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 3, characterized in that: A second adjustment mechanism is provided between the second detection group and the winding mechanism, and the second adjustment mechanism is used to adjust the length of the pole piece between the second detection group and the winding mechanism so that the spacing between the second detection group and the winding mechanism along the pole piece movement path matches the spacing between the pole ears.

5. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 4, characterized in that: The first adjustment mechanism and the second adjustment mechanism both include a fixed roller, a movable roller and a translation assembly. The movable roller and the fixed roller are used to wind the pole piece. The movable roller is arranged parallel to the fixed roller. The movable roller has the freedom to move along an axis perpendicular to its own axis relative to the fixed roller. The translation assembly is used to adjust the distance between the movable roller and the fixed roller.

6. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 5, characterized in that: The translation assembly includes a sliding bracket and a translation slider. The movable roller is rotatably arranged on the translation slider. A sliding structure is arranged on the sliding bracket. The translation slider is slidingly connected to the sliding bracket through the sliding structure and adjusts the position of the movable roller by its own movement.

7. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 6, characterized in that: The sliding structure includes a sliding groove, which is arranged on the sliding bracket. An adjusting pin that can slide along the length direction of the sliding groove is passed through the sliding groove. One end of the adjusting pin is movably connected to the translation slider, and the other end abuts against a side of the sliding bracket away from the translation slider.

8. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 3, characterized in that: The first detection mechanism and the second detection mechanism both include a detection bracket, a detection slider, a driving unit, a resistance detection unit and a supporting component. The detection slider is movably arranged on the detection bracket, and the supporting component and the detection slider are arranged opposite to each other, and the supporting component and the detection slider are respectively located on both sides of the pole piece. The driving unit is arranged on the detection bracket, and the driving end is connected to the detection slider. The driving unit is used to drive the detection slider to approach or move away from the supporting component, and the resistance detection unit is arranged on the side of the detection slider facing the supporting component.

9. The on-line testing device for the guide pin resistance of the stapling winding machine according to claim 8, characterized in that: The resistance detection unit has a test plane, and the test plane is used to abut against the tab.

10. A method for online testing of lead resistance of a nailing winding machine, characterized in that: The steps include: Adjust the length of the pole piece between the resistance detection mechanism and the winding mechanism so that after the winding mechanism completes a winding process, the resistance detection mechanism corresponds to the position of one of the pole ears on the pole piece; The winding mechanism winds the pole piece, and the pole piece stops moving after completing a winding process. The shearing mechanism cuts off the pole piece from a preset position after the winding mechanism completes the winding of the pole piece. The resistance detection mechanism contacts the pole ear of the pole piece before the shearing mechanism cuts off the pole piece to detect the resistance of the pole ear. Defective products after winding are rejected according to the measurement results of the resistance detection mechanism.

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