Battery pole piece slitting cutting die, pole piece manufacturing equipment and battery production line

Abstract

The utility model provides a battery pole piece slitting cutting die, pole piece manufacturing equipment and a battery production line, and belongs to the technical field of batteries. The battery pole piece slitting cutter die comprises a rack, a first slitting assembly, a second slitting assembly and a cutter leaning amount detection assembly. The first slitting assembly comprises a first cutter shaft and a first slitting cutter which are erected on the rack; the second slitting assembly comprises a second cutter shaft and a second slitting cutter which are erected on the rack and are parallel to the first cutter shaft; the first cutter shaft is configured to move in the first direction parallel to the central axis of the first cutter shaft, so that the first slitting cutter can move between the first position making contact with the second slitting cutter and the second position spaced from the second slitting cutter by a preset distance. The cutter leaning amount detection assembly is used for detecting the cutter leaning amount of the first slitting cutter and the second slitting cutter in the first direction. Therefore, more convenient adjustment of the knife leaning amount can be realized, and the adjustment precision is improved, so that the slitting quality of the pole piece is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pole piece slitting die, pole piece manufacturing equipment and a battery production line. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In some cases, a slitting device with an upper knife and a lower knife is generally used to slit the battery pole piece. The amount of support between the upper knife and the lower knife is set and the upper knife and the lower knife work together to achieve stable cutting of the pole piece. During the slitting process of the battery pole piece, the adjustment accuracy of the support parameter directly affects the quality of the pole piece slitting. In addition, during the pole piece slitting process, the upper knife and the lower knife will move as the operation proceeds, which will not only cause burrs on the pole piece, but also affect the consistency of the pole piece size, thereby affecting the pole piece slitting quality, and the slitting risk is uncontrollable. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a battery pole piece slitting die, pole piece manufacturing equipment and battery production line to solve the problem of insufficient efficiency and accuracy of knife adjustment.

[0005] An embodiment of the first aspect of the present application provides a battery electrode slitting knife die. The battery electrode slitting knife die includes a frame, a first slitting assembly, a second slitting assembly, and a knife approach detection assembly. The first slitting assembly includes a first knife shaft mounted on the frame, and a first slitting knife provided on the surface of the first knife shaft; the second slitting assembly includes a second knife shaft mounted on the frame and arranged parallel to the first knife shaft, and a second slitting knife provided on the surface of the second knife shaft; the first knife shaft is constructed to be able to move along a first direction parallel to its central axis, so that the first slitting knife can move between a first position in contact with the second slitting knife and a second position spaced a preset distance from the second slitting knife; the knife approach detection assembly is used to detect the knife approach amount of the first slitting knife and the second slitting knife along the first direction.

[0006] In the technical solution of the embodiment of the present application, the movable setting of the first knife shaft is conducive to more convenient adjustment of the knife amount. At the same time, by setting the knife amount detection component, the real-time monitoring of the knife amount can be realized to improve the knife amount adjustment accuracy and thus improve the quality of the electrode slitting. In addition, when it is necessary to replace the slitting equipment parts, such as the first slitting knife and the second slitting knife, the knife amount between the first slitting knife and the second slitting knife needs to be re-calibrated and debugged. By setting the knife amount detection component, the calibration and debugging time can be reduced and the efficiency of parts replacement can be improved.

[0007] In some embodiments, the knife-leaning amount detection component includes a displacement sensor, which is fixedly connected to at least one of the first slitting component and the second slitting component, and the displacement sensor is used to detect the movement distance of the first slitting knife relative to the second slitting knife along the first direction. By setting the displacement sensor, the movement distance of the first slitting knife relative to the second slitting knife along the first direction can be detected, the detection cost is low, the operation is simple, and the detection result has high accuracy and high reliability, which is conducive to real-time judgment of the knife-leaning amount and thus improves the quality of pole piece slitting.

[0008] In some embodiments, the displacement sensor includes: a magnetic scale fixedly connected to the second slitting assembly, and a magnetic read head fixedly connected to the first slitting assembly, and the magnetic read head can move synchronously with the first cutter shaft relative to the magnetic scale along the first direction. By setting the magnetic scale and the magnetic read head, it is helpful to accurately obtain the change value of the cutting amount, thereby realizing the monitoring of the consistency of the pole piece slitting, and then improving the pole piece slitting quality.

[0009] In some embodiments, the displacement sensor determines the amount of knife leaning according to the displacement of the read head relative to the reference position during the movement, and the reference position is the position of the read head when the first slitting knife is at the first position. By setting the reference position and determining the amount of knife leaning based on the reference position, it is helpful to reduce the difficulty of adjusting the amount of knife leaning, thereby improving the efficiency of calibration and debugging.

[0010] In some embodiments, the knife amount detection component also includes a display element, which is connected to the displacement sensor signal and is used to receive and display the knife amount. By setting the display element, the fluctuation of the knife amount can be intuitively obtained, thereby realizing the monitoring of the consistency of the pole piece slitting, thereby improving the pole piece slitting quality.

[0011] In some embodiments, the first slitting assembly further includes a fixed cylinder, the fixed cylinder is fixedly connected to the frame, the first knife shaft is sleeved on the outer surface of the fixed cylinder, and can move relative to the fixed cylinder along a first direction. The first knife shaft is movably connected to the fixed cylinder, which is conducive to the relative movement of the first slitting knife relative to the second slitting knife to achieve the adjustment of the knife amount, thereby improving the calibration and debugging efficiency.

[0012] In some embodiments, the first slitting assembly further includes a first bearing seat and a second bearing seat spaced apart along the first direction, the first bearing seat is fixedly connected to the frame, one end of the fixed cylinder is passed through the through hole of the first bearing seat, the second bearing seat is slidably connected to the frame, and one end of the first knife shaft away from the fixed cylinder is passed through the through hole of the second bearing seat. By driving the second bearing seat and the first knife shaft to move together, the relative position of the first slitting knife and the second slitting knife can be directional adjusted to adjust the knife amount, thereby improving the calibration and debugging efficiency.

[0013] In some embodiments, the first slitting assembly and the second slitting assembly are arranged in the vertical direction, and the second slitting assembly includes a third bearing seat and a fourth bearing seat which are arranged relatively spaced apart in the first direction and are respectively fixedly connected to the frame; wherein the first bearing seat is fixedly connected to the top of the third bearing seat, and the second bearing seat is located at the top of the fourth bearing seat and is slidably connected to the fourth bearing seat. Thus, the third bearing seat and the fourth bearing seat can support the first bearing seat and the second bearing seat, which is conducive to adjusting the amount of knife leaning and improving the adjustment accuracy of the amount of knife leaning.

[0014] In some embodiments, one of the top surface of the fourth bearing seat and the bottom surface of the second bearing seat is provided with a slide rail, and the other is provided with a slide groove matched with the slide rail; the slide rail and the slide groove both extend along the first direction. By providing the slide rail and the slide groove, the moving direction of the first knife shaft can be better controlled, which is conducive to adjusting the amount of knife leaning and improving the adjustment accuracy of the amount of knife leaning.

[0015] In some embodiments, a mounting groove extending along the first direction is provided on the top of the fourth bearing seat, and the second bearing seat is configured to be detachably connected to the mounting groove via a fastener. The fastener can realize the detachable connection between the second bearing seat and the first bearing seat, which is beneficial to the stability of the relative position between the first slitting knife and the second slitting knife, thereby improving the quality of pole piece slitting.

[0016] In some embodiments, the battery pole piece cutting die includes a first driving device, which is used to drive the first blade shaft and the second blade shaft to rotate respectively. By setting the first driving device, the first blade shaft and the second blade shaft can rotate synchronously, thereby achieving high-quality cutting of the pole piece.

[0017] In some embodiments, the battery electrode sheet slitting die includes a second drive device, which is connected to the first knife shaft to drive the first knife shaft to move along the first direction. By providing the second drive device, the amount of the knife can be automatically adjusted to improve the adjustment accuracy, thereby improving the quality of the electrode sheet slitting.

[0018] In some embodiments, the battery pole piece cutting knife die includes an alarm device, which is used to prompt the first cutting knife to be in the first position or the second position. By providing the alarm device, an alarm function can be realized for the first knife shaft during the movement along the first direction, thereby improving the adjustment accuracy and helping to improve the pole piece cutting quality.

[0019] An embodiment of the second aspect of the present application provides a pole piece manufacturing device, which includes the battery pole piece slitting die in the above-mentioned embodiment.

[0020] An embodiment of the third aspect of the present application provides a battery production line, which includes the pole piece manufacturing equipment in the above embodiment.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0023] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0024] Figure 2 A schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0025] Figure 3 This is one of the structural schematic diagrams of the battery pole piece cutting die of some embodiments of the present application;

[0026] Figure 4 This is the second structural schematic diagram of the battery pole piece cutting die of some embodiments of the present application;

[0027] Figure 5 Schematic diagram of the installation of the magnetic scale and the read head according to some embodiments of the present application.

[0028] Description of reference numerals:

[0029] Vehicles 1000;

[0030] Battery 100, controller 200, motor 300;

[0031] Box body 10, first part 11, second part 12;

[0032] Battery cell 20, rack 30;

[0033] A first slitting assembly 40, a first knife shaft 41, a first slitting knife 42, a fixing cylinder 43, a first bearing seat 44, and a second bearing seat 45;

[0034] A second slitting assembly 50, a second knife shaft 51, a second slitting knife 52, a third bearing seat 53, and a fourth bearing seat 54;

[0035] A knife-measurement detection component 60, a magnetic scale 61, and a magnetic reading head 62;

[0036] Slide rail 70, slide groove 71, coupling 80;

[0037] The first direction X. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0047] In the battery manufacturing process, the pole sheet materials need to be rolled and slit before they can be wound into the shell. Rolling means rolling the pole sheet materials into a more compact positive and negative electrode structure through high-speed rotating shafts and rollers, and slitting means cutting the pole sheets according to battery specifications.

[0048] Battery pole piece cutting is an important step in the battery manufacturing process, which has a crucial impact on battery consistency, capacity, cycle life and safety performance. In some embodiments, a cutting device with an upper knife and a lower knife is generally used to cut the pole piece, and the distance between the upper knife and the lower knife is set and the upper knife and the lower knife work together to achieve stable cutting of the pole piece.

[0049] During the electrode slitting process, the upper and lower knives will shift as the operation progresses, which will not only cause burrs on the electrode, but also affect the consistency of the electrode size, thereby affecting the quality of the electrode slitting. In addition, when it is necessary to replace the slitting equipment components, such as the upper or lower knife, the distance between the upper and lower knives needs to be calibrated and debugged again. The calibration and debugging after replacement and installation is done by manpower and takes a lot of time, affecting the slitting efficiency.

[0050] Based on the above considerations, the embodiment of the present application proposes a battery electrode sheet slitting knife die, which includes a frame, a first slitting component, a second slitting component and a knife-leaving amount detection component. The first slitting component includes a first knife shaft mounted on the frame, and a first slitting knife arranged on the surface of the first knife shaft; the second slitting component includes a second knife shaft mounted on the frame and arranged parallel to the first knife shaft, and a second slitting knife arranged on the surface of the second knife shaft; the first knife shaft is constructed to be able to move along a first direction parallel to its central axis, so that the first slitting knife can move between a first position in contact with the second slitting knife and a second position spaced a preset distance from the second slitting knife; the knife-leaving amount detection component is used to detect the knife-leaving amount of the first slitting knife and the second slitting knife along the first direction. Therefore, the first knife shaft is designed to be adjustable along the first direction to achieve more convenient knife-leaving amount adjustment, and combined with the knife-leaving amount detection component, the adjustment accuracy can be improved, which helps to improve the quality of electrode sheet slitting.

[0051] The battery pole piece cutting die disclosed in the embodiment of the present application can be used to produce battery cells. Battery cells can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery cells and batteries disclosed in the present application can be used to form the electrical device.

[0052] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0053] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0054] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0055] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0056] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery provided for some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0057] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0058] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0059] like Figure 3-Figure 5 For example, Figure 3 This is one of the structural schematic diagrams of the battery pole piece cutting die of some embodiments of the present application; Figure 4 This is the second structural schematic diagram of the battery pole piece cutting die of some embodiments of the present application; Figure 5 Schematic diagram of the installation of the magnetic scale and the read head according to some embodiments of the present application.

[0060] The embodiment of the present application provides a battery electrode sheet slitting die, including a frame 30, a first slitting assembly 40, a second slitting assembly 50 and a knife-leaving amount detection assembly 60. The first slitting assembly 40 includes a first knife shaft 41 mounted on the frame 30, and a first slitting knife 42 provided on the surface of the first knife shaft 41; the second slitting assembly 50 includes a second knife shaft 51 mounted on the frame 30 and arranged parallel to the first knife shaft 41, and a second slitting knife 52 provided on the surface of the second knife shaft 51; the first knife shaft 41 is configured to be able to move along a first direction X parallel to its central axis, so that the first slitting knife 42 can move between a first position in contact with the second slitting knife 52 and a second position spaced a preset distance from the second slitting knife 52; the knife-leaving amount detection assembly 60 is used to detect the knife-leaving amount of the first slitting knife 42 and the second slitting knife 52 along the first direction X.

[0061] The frame 30 can be designed and assembled in a separate manner, or can be designed in an integrated manner, and its function is to support the first slitting assembly 40 and the second slitting assembly 50. In some embodiments, the frame 30 is assembled from a plurality of plate-like structures, and the plurality of plate-like structures can be connected and fixed by bolts. In addition, the frame 30 is provided with a bottom plate, and the first slitting assembly 40 and the second slitting assembly 50 can be supported by connecting and fixing the bottom plate with the plurality of plate-like structures.

[0062] The first slitting assembly 40 and the second slitting assembly 50 are assemblies that can realize slitting of the pole piece. In some embodiments, the first slitting assembly 40 is installed above the second slitting assembly 50 at intervals. The first blade shaft 41 and the second blade shaft 51 are both clamped on the frame 30, and the first blade shaft 41 and the second blade shaft 51 are both columnar structures, wherein the first blade shaft 41 and the second blade shaft 51 can both rotate along their axes. The first slitting knife 42 and the second slitting knife 52 are annular blade structures, and are fixedly mounted to the surfaces of the first blade shaft 41 and the second blade shaft 51, respectively. In some embodiments, the first slitting knife 42 and the second slitting knife 52 can be detachably connected to the first blade shaft 41 and the second blade shaft 51, respectively, to facilitate replacement and adjustment.

[0063] The first blade shaft 41 can be moved in the first direction X parallel to its central axis by an external power device, wherein the moving range is between the first position where the first slitting knife 42 can contact with the second slitting knife 52 and the second position at a preset distance from the second slitting knife 52. It should be understood that the first position and the second position are relative positions, i.e., the relative positions between the first slitting knife 42 and the second slitting knife 52. The contact between the first slitting knife 42 and the second slitting knife 52 can refer to the contact in the physical sense, i.e., the distance between the two is 0. The second position is the relative position at which the first slitting knife 42 and the second slitting knife 52 are separated by a preset distance, wherein the preset distance can be obtained through empirical values, and the preset distance corresponds to the maximum distance that the first blade shaft 41 moves in the first direction X parallel to its central axis. In some embodiments, the preset distance can be the distance at which the first slitting knife 42 and the second slitting knife 52 can achieve pole piece slitting, or it can be a safety distance set to prevent damage to the battery pole piece slitting knife die.

[0064] The amount of knife leaning is defined as the distance between the first slitting knife 42 and the second slitting knife 52 along the first direction X, wherein the first direction X is a direction parallel to the central axis of the first knife shaft 41. The knife leaning amount detection component 60 can be mounted on the frame 30 or on the first slitting component 40 or the second slitting component 50. In some embodiments, the knife leaning amount detection component 60 is a photosensitive element or a magnetic scale 61 component.

[0065] The movable setting of the first blade shaft is conducive to more convenient adjustment of the blade amount. At the same time, by setting the blade amount detection component 60, the real-time monitoring of the blade amount can be realized to improve the blade amount adjustment accuracy and thus improve the quality of the electrode slitting. In addition, when it is necessary to replace the slitting equipment parts, such as the first slitting knife 42 and the second slitting knife 52, the blade amount between the first slitting knife 42 and the second slitting knife 52 needs to be re-calibrated and debugged. By setting the blade amount detection component 60, the calibration and debugging time can be reduced, and the efficiency of parts replacement can be improved.

[0066] According to some embodiments of the present application, the knife amount detection component 60 includes a displacement sensor, which is fixedly connected to at least one of the first slitting component 40 and the second slitting component 50, and the displacement sensor is used to detect the movement distance of the first slitting knife 42 relative to the second slitting knife 52 along the first direction X.

[0067] Displacement sensor, also known as linear sensor, is a linear device belonging to metal induction. The function of the sensor is to convert various measured physical quantities into electrical quantities, and the physical quantity to be tested by the displacement sensor is displacement, among which displacement is the quantity related to the movement of the position of the object during the movement. Small displacement is usually detected by strain, inductance, differential transformer, eddy current, Hall sensor, and large displacement is usually measured by induction synchronizer, grating, capacitive grating, magnetic grating and other sensing technologies.

[0068] In some embodiments, the displacement sensor is fixedly connected to at least one of the first slitting component 40 and the second slitting component 50. It should be understood that if the displacement sensor is only a single component, the displacement sensor is fixedly connected to the first slitting component 40 or the second slitting component 50. If the displacement sensor is a plurality of components and is installed as a set to realize the displacement detection function, the displacement sensor is fixedly connected to the first slitting component 40 and the second slitting component 50.

[0069] By setting a displacement sensor, the moving distance of the first slitting knife 42 relative to the second slitting knife 52 along the first direction X can be detected. The detection cost is low and the operation is simple. The detection result has high accuracy and high reliability, which is conducive to real-time judgment of the knife amount and thus improves the quality of electrode slitting.

[0070] According to some embodiments of the present application, the displacement sensor includes: a magnetic scale 61 fixedly connected to the second cutting component 50, and a read head 62 fixedly connected to the first cutting component 40, and the read head 62 can move synchronously with the first knife shaft 41 relative to the magnetic scale 61 along the first direction X.

[0071] The magnetic scale 61 is a precision instrument that uses the magnetic principle to measure displacement. The supporting component of the magnetic scale 61 is a read head 62, which detects the change of the magnetic field on the magnetic scale to achieve accurate position measurement. The magnetic scale 61 and the read head 62 are respectively fixed to the second slitting component 50 and the first slitting component 40 by bolts, wherein the first cutter shaft 41 moves along the first direction X while driving the read head 62 to move. Therefore, the moving distance of the first slitting knife 42 relative to the second slitting knife 52 in the first direction X, that is, the value of the knife amount, can be accurately obtained through the read head 62.

[0072] By providing the magnetic scale 61 and the magnetic reading head 62, it is helpful to accurately obtain the change value of the cutting amount, so as to monitor the consistency of the pole piece cutting, thereby improving the pole piece cutting quality.

[0073] According to some embodiments of the present application, the displacement sensor determines the approach distance according to the displacement of the read head 62 relative to the reference position during the movement, and the reference position is the position of the read head 62 when the first slitting knife 42 is at the first position.

[0074] The first position is also referred to as the zero position, in which the first slitting knife 42 and the second slitting knife 52 are in contact. In some embodiments, the first slitting knife 42 and the second slitting knife 52 are made of conductive materials and are both connected to a detection circuit. When the first slitting knife 42 and the second slitting knife 52 are in contact, the detection circuits to which the first slitting knife 42 and the second slitting knife 52 are connected are connected, thereby triggering a zero signal, that is, the distance between the first slitting knife 42 and the second slitting knife 52 along the first direction X is 0. It should be understood that the distance between the first slitting knife 42 and the second slitting knife 52 along the first direction X being 0 does not mean that the physical distance between the two in the first direction X is 0. In some other examples, when there is still a physical distance between the first slitting knife 42 and the second slitting knife 52, the detection circuit can also be connected to trigger a zero signal.

[0075] The reference position can clear the knife amount and automatically realize the zero-point knife setting operation of the first slitting knife and the second slitting knife, which is conducive to eliminating the knife amount detection error during the movement of the first knife axis along the first direction, thereby improving the quality of the electrode slitting. In addition, in the process of re-adjusting the knife amount after the battery electrode slitting knife die is replaced with a knife, by setting the reference position and determining the knife amount based on the reference position, it is conducive to reducing the difficulty of adjusting the knife amount, thereby improving the efficiency of calibration and debugging.

[0076] According to some embodiments of the present application, the tool approach amount detection component 60 further includes a display component, which is connected to the displacement sensor signal, and is used to receive and display the tool approach amount.

[0077] The display element is a component for displaying the amount of cutting, and the display element may be a liquid crystal display screen. The display element is fixedly mounted to the first slitting assembly 40, and is electrically connected to the displacement sensor through a wiring harness.

[0078] By setting the display part, the fluctuation of the knife amount can be intuitively obtained, so as to monitor the consistency of the electrode slitting and then improve the quality of the electrode slitting.

[0079] According to some embodiments of the present application, the first slitting assembly 40 also includes a fixed cylinder 43, which is fixedly connected to the frame 30, and the first knife shaft 41 is sleeved on the outer surface of the fixed cylinder 43 and can move along the first direction X relative to the fixed cylinder 43.

[0080] The fixed cylinder 43 may be a columnar structure, which is fixedly connected to the frame 30 by bolt connection. The first blade shaft 41 is sleeved on the outer surface of the fixed cylinder 43, and at least a part of the fixed cylinder 43 is located inside the first blade shaft 41. The first blade shaft 41 can be moved relative to the fixed cylinder 43 along the first direction X by an external device acting on the first blade shaft 41.

[0081] The first knife shaft 41 is movably connected to the fixed cylinder 43, which is conducive to the relative movement of the first slitting knife 42 with respect to the second slitting knife 52 to achieve the adjustment of the knife approach amount, thereby improving the calibration and debugging efficiency.

[0082] According to some embodiments of the present application, the first slitting assembly 40 also includes a first bearing seat 44 and a second bearing seat 45 spaced apart along the first direction X, the first bearing seat 44 is fixedly connected to the frame 30, one end of the fixed cylinder 43 is passed through the through hole of the first bearing seat 44, the second bearing seat 45 is slidably connected to the frame 30, and the end of the first knife shaft 41 away from the fixed cylinder 43 is passed through the through hole of the second bearing seat 45.

[0083] The first bearing seat 44 and the second bearing seat 45 are arranged at intervals along the first direction X, wherein the first knife shaft 41 and the fixed cylinder 43 are arranged in the middle of the first bearing seat 44 and the second bearing seat 45. The first bearing seat 44 and the frame 30 can be fixedly connected by bolts or welding. The first bearing seat 44 has a through hole, through which the fixed cylinder 43 is inserted, and a bearing is arranged between one end of the fixed cylinder 43 and the first bearing seat 44. The second bearing seat 45 can be movably connected to the frame 30 through the slide rail 70. The second bearing seat 45 has a through hole for the end of the first knife shaft 41 away from the fixed cylinder 43 to pass through, and a bearing is arranged between the end of the first knife shaft 41 away from the fixed cylinder 43 and the second bearing seat 45.

[0084] By setting the first bearing seat 44 and the second bearing seat 45, and the first bearing seat 44 and the second bearing seat 45 are respectively fixedly connected and slidably connected to the frame 30, therefore, by driving the second bearing seat 45 and the first knife shaft to move together, the relative position of the first slitting knife 42 and the second slitting knife 52 can be directional adjusted to adjust the knife approach amount, thereby improving the correction and debugging efficiency.

[0085] According to some embodiments of the present application, the first slitting assembly 40 and the second slitting assembly 50 are arranged in the vertical direction, and the second slitting assembly 50 includes a third bearing seat 53 and a fourth bearing seat 54 which are relatively spaced along the first direction X and are respectively fixedly connected to the frame 30; wherein the first bearing seat 44 is fixedly connected to the top of the third bearing seat 53, and the second bearing seat 45 is located at the top of the fourth bearing seat 54 and is slidably connected to the fourth bearing seat 54.

[0086] The third bearing seat 53 and the fourth bearing seat 54 can be fixed to the frame 30 by bolts or welding. Through holes are provided in the third bearing seat 53 and the fourth bearing seat 54 for the second knife shaft 51 to pass through, and bearings are provided between the two ends of the second knife shaft 51 and the third bearing seat 53 and the fourth bearing seat 54. The first bearing seat 44 can be fixed to the top of the third bearing seat 53 by bolts, and the second bearing seat 45 can be slidably connected to the fourth bearing seat 54 by a slide rail 70.

[0087] By providing the third bearing seat 53 and the fourth bearing seat 54, the first bearing seat 44 and the second bearing seat 45 can be supported, which is beneficial to the adjustment of the amount of knife leaning and improves the adjustment accuracy of the amount of knife leaning.

[0088] According to some embodiments of the present application, one of the top surface of the fourth bearing seat 54 and the bottom surface of the second bearing seat 45 is provided with a slide rail 70, and the other is provided with a slide groove 71 that cooperates with the slide rail 70; both the slide rail 70 and the slide groove 71 extend along the first direction X.

[0089] The slide rail 70 may be a roller slide rail, a steel ball slide rail, a gear slide rail, or a damping slide rail. The present application does not limit the specific type of the slide rail 70, as long as the relative sliding of the fourth bearing seat 54 and the second bearing seat 45 can be achieved. In some embodiments, the top surface of the fourth bearing seat 54 is provided with a slide rail 70, and the bottom surface of the second bearing seat 45 is provided with a slide groove 71. The relative movement of the slide groove 71 and the slide rail 70 can achieve the relative movement of the fourth bearing seat 54 and the second bearing seat 45, thereby achieving the relative movement of the first slitting knife 42 and the second slitting knife 52 to adjust the amount of the knife. The slide rail 70 and the slide groove 71 are arranged in coordination and extend along the first direction X, and the length of the extension of the two is less than or equal to the width of the fourth bearing seat 54 along the first direction X.

[0090] By providing the slide rail 70 and the slide groove 71, the moving direction of the first knife axis can be better controlled, which is conducive to adjusting the amount of knife contact and improving the adjustment accuracy of the amount of knife contact.

[0091] According to some embodiments of the present application, a mounting groove extending along the first direction X is provided at the top of the fourth bearing seat 54, and the second bearing seat 45 is constructed to be detachably connected to the mounting groove via a fastener.

[0092] The mounting groove may be a long rectangular groove extending along the first direction X, or an oval groove, and the length of the mounting groove along the first direction X is greater than or equal to the maximum stroke of the second bearing seat 45 along the first direction X. The fastener may be a hexagonal bolt, which passes through the vertical hole in the second bearing seat 45 and is connected to the mounting groove.

[0093] The second bearing seat 45 and the first bearing seat 44 can be detachably connected by fasteners, which is beneficial to the stability of the relative position between the first slitting knife 42 and the second slitting knife 52, thereby improving the pole piece slitting quality.

[0094] According to some embodiments of the present application, the battery electrode sheet slitting die includes a first driving device, and the first driving device is used to drive the first knife shaft 41 and the second knife shaft 51 to rotate respectively.

[0095] The first driving device may be a motor. The first driving device is connected to the ends of the first blade shaft 41 and the second blade shaft 51 through a coupling 80 to drive the first blade shaft 41 and the second blade shaft 51 to rotate.

[0096] By providing the first driving device, the first blade shaft 41 and the second blade shaft 51 can rotate synchronously, thereby achieving high-quality cutting of the pole piece.

[0097] According to some embodiments of the present application, the battery electrode sheet slitting die includes a second driving device, which is transmission-connected to the first knife shaft 41 to drive the first knife shaft 41 to move along the first direction X.

[0098] The second driving device may be an electric, pneumatic or hydraulic device. The second driving device may enable the first knife shaft 41 to move relative to the second knife shaft 51 along the first direction X so as to adjust the knife approach amount.

[0099] The second driving device can cooperate with the knife amount detection component. When an abnormal fluctuation in the knife amount between the first slitting knife 42 and the second slitting knife 52 is detected, the second driving device drives the first knife shaft 41 to move so that the knife amount meets the slitting requirement again.

[0100] By providing the second driving device, the amount of knife contact can be automatically adjusted, the adjustment accuracy can be improved, and thus the pole piece slitting quality can be improved.

[0101] According to some embodiments of the present application, the battery electrode sheet slitting knife die includes an alarm device, and the alarm device is used to prompt that the first slitting knife 42 is in the first position or the second position.

[0102] The alarm device can be fixedly mounted on the frame 30. When the first slitting knife 42 moves to the first position where it contacts the second slitting knife 52, that is, the zero position, the alarm device is used to prompt that the zero position setting has been completed. When the first slitting knife 42 moves to the second position where it is spaced a preset distance from the second slitting knife 52, the alarm device is used to prompt that the limit distance of the first slitting knife 42 has been reached, that is, in this case, the relative position of the first slitting knife 42 and the second slitting knife 52 has reached the limit.

[0103] The second drive device can also work in coordination with the blade amount detection component and the alarm device. When the battery electrode sheet cutting knife die is cutting the electrode sheet, when the blade amount detection component detects that the blade amount between the first cutting knife 42 and the second cutting knife 52 exceeds the preset threshold range, the alarm device will sound an alarm to remind the operator to control the second drive device to readjust the blade amount. Or, when the second drive device adjusts the blade amount, when the detection result of the blade amount detection component indicates that the first cutting knife 42 has reached the specified position or exceeds the preset travel range, an alarm is sounded, and the second drive device is controlled to stop or reverse movement. For example, when the first cutting knife 42 reaches the first position in contact with the second cutting knife 52, the alarm device sounds an alarm and controls the second drive device to stop driving to prevent the transition between the first cutting knife 42 and the second cutting knife 52. For example, when the first cutting knife 42 exceeds the second position, the alarm device sounds an alarm and controls the second drive device to stop driving or reverse drive the first cutting knife 42.

[0104] By providing an alarm device, an alarm function can be implemented for the first knife shaft during its movement along the first direction, thereby improving the adjustment accuracy and contributing to improving the pole piece slitting quality.

[0105] An embodiment of the present application provides a pole piece manufacturing device, including the battery pole piece slitting die of the aforementioned embodiment.

[0106] The electrode manufacturing equipment can detect and identify the distance of the first slitting knife 42 and the second slitting knife 52 along the first direction X through the distance detection component 60, thereby reducing the burr phenomenon of the electrode, ensuring the consistency of the size of the cut electrode, and improving the quality of the electrode slitting.

[0107] An embodiment of the present application provides a battery production line, including the pole piece manufacturing equipment of the aforementioned embodiment.

[0108] The battery production line is a production system for battery manufacturing, which may also include pole piece rolling equipment, battery cell winding equipment, battery cell packaging equipment, and battery formation equipment. The provision of the knife amount detection component 60 is beneficial to improving the safety and reliability of the manufactured battery.

[0109] like Figure 3-Figure 5 As an example, an embodiment of the present application provides a battery pole piece cutting knife die, and the battery pole piece cutting knife die includes a frame 30, a first cutting component 40, a second cutting component 50 and a knife amount detection component 60.

[0110] The first slitting assembly 40 includes a first blade shaft 41 mounted on the frame 30, a first slitting blade 42 provided on the surface of the first blade shaft 41, a fixed cylinder 43, and a first bearing seat 44 and a second bearing seat 45 arranged at intervals along the first direction X. The fixed cylinder 43 is fixedly connected to the frame 30, the first blade shaft 41 is sleeved on the outer surface of the fixed cylinder 43, and can move relative to the fixed cylinder 43 along the first direction X. The first bearing seat 44 is fixedly connected to the frame 30, one end of the fixed cylinder 43 is penetrated through the through hole of the first bearing seat 44, the second bearing seat 45 is slidably connected to the frame 30, and one end of the first blade shaft 41 away from the fixed cylinder 43 is penetrated through the through hole of the second bearing seat 45.

[0111] The second slitting assembly 50 includes a second knife shaft 51 mounted on the frame 30 and arranged parallel to the first knife shaft 41, a second slitting knife 52 arranged on the surface of the second knife shaft 51, and a third bearing seat 53 and a fourth bearing seat 54 arranged relatively spaced apart along the first direction X and respectively fixedly connected to the frame 30. The first slitting assembly 40 and the second slitting assembly 50 are arranged in the vertical direction.

[0112] The first blade shaft 41 is configured to be movable along a first direction X parallel to its central axis, so that the first slitting knife 42 can move between a first position in contact with the second slitting knife 52 and a second position spaced a preset distance from the second slitting knife 52. In addition, one of the top surface of the fourth bearing seat 54 and the bottom surface of the second bearing seat 45 is provided with a slide rail 70, and the other is provided with a slide groove 71 matched with the slide rail 70, and both the slide rail 70 and the slide groove 71 extend along the first direction X.

[0113] The knife approach detection component 60 is used to detect the knife approach amount of the first slitting knife 42 and the second slitting knife 52 along the first direction X. The knife approach detection component 60 includes a displacement sensor, wherein the displacement sensor includes a magnetic scale 61 fixedly connected to the second slitting component 50, and a read head 62 fixedly connected to the first slitting component 40, and the read head 62 can move synchronously with the first knife shaft 41 relative to the magnetic scale 61 along the first direction X. The displacement sensor determines the knife approach amount according to the displacement of the read head 62 relative to the reference position during the movement process, and the reference position is the position of the read head 62 when the first slitting knife 42 is located at the first position.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery pole piece cutting die, characterized in that: include: frame; The first slitting assembly comprises a first cutter shaft mounted on the frame, and a first slitting knife arranged on the surface of the first cutter shaft; The second slitting assembly comprises a second knife shaft mounted on the frame and arranged parallel to the first knife shaft, and a second slitting knife arranged on the surface of the second knife shaft; The first knife shaft is configured to be movable in a first direction parallel to its central axis, so that the first slitting knife can move between a first position in contact with the second slitting knife and a second position spaced a preset distance from the second slitting knife; The knife approach detection component is used to detect the knife approach amount of the first slitting knife and the second slitting knife along the first direction.

2. The battery pole piece cutting die according to claim 1, characterized in that: The knife approach detection component includes a displacement sensor, which is fixedly connected to at least one of the first slitting component and the second slitting component, and is used to detect the movement distance of the first slitting knife relative to the second slitting knife along the first direction.

3. The battery pole piece cutting die according to claim 2, characterized in that: The displacement sensor comprises: a magnetic scale fixedly connected to the second cutting assembly, and a read head fixedly connected to the first cutting assembly, wherein the read head can move synchronously with the first blade shaft relative to the magnetic scale along the first direction.

4. The battery pole piece cutting die according to claim 3, characterized in that: The displacement sensor determines the knife approach amount according to the displacement of the read head relative to a reference position during movement, and the reference position is the position of the read head when the first slitting knife is located at the first position.

5. The battery pole piece cutting die according to claim 2, characterized in that: The tool-leaning amount detection component also includes a display component, which is connected to the displacement sensor signal and is used to receive and display the tool-leaning amount.

6. The battery pole piece cutting die according to any one of claims 1 to 5, characterized in that: The first slitting assembly further comprises a fixed cylinder, wherein the fixed cylinder is fixedly connected to the frame, and the first knife shaft is sleeved on the outer surface of the fixed cylinder and can move relative to the fixed cylinder along the first direction.

7. The battery pole piece cutting die according to claim 6, characterized in that: The first slitting assembly also includes a first bearing seat and a second bearing seat spaced apart along the first direction, the first bearing seat is fixedly connected to the frame, one end of the fixed cylinder is passed through the through hole of the first bearing seat, the second bearing seat is slidably connected to the frame, and one end of the first knife shaft away from the fixed cylinder is passed through the through hole of the second bearing seat.

8. The battery pole piece cutting die according to claim 7, characterized in that: The first slitting assembly and the second slitting assembly are arranged in a vertical direction, and the second slitting assembly comprises a third bearing seat and a fourth bearing seat which are arranged relatively spaced apart along the first direction and are respectively fixedly connected to the frame; Wherein, the first bearing seat is fixedly connected to the top of the third bearing seat, and the second bearing seat is located on the top of the fourth bearing seat and is slidably connected to the fourth bearing seat.

9. The battery pole piece cutting die according to claim 8, characterized in that: One of the top surface of the fourth bearing seat and the bottom surface of the second bearing seat is provided with a slide rail, and the other is provided with a slide groove matched with the slide rail; the slide rail and the slide groove both extend along the first direction.

10. The battery pole piece cutting die according to claim 9, characterized in that: A mounting groove extending along the first direction is provided on the top of the fourth bearing seat, and the second bearing seat is constructed to be detachably connected to the mounting groove via a fastener.

11. The battery pole piece cutting die according to any one of claims 1 to 5, characterized in that: Also includes: A first driving device, wherein the first driving device is used to drive the first knife shaft and the second knife shaft to rotate respectively.

12. The battery pole piece cutting die according to any one of claims 1 to 5, characterized in that: Also includes: A second driving device is connected to the first knife shaft in driving connection so as to drive the first knife shaft to move along the first direction.

13. The battery pole piece cutting die according to any one of claims 1 to 5, characterized in that: It also includes an alarm device, which is used to prompt that the first slitting knife is in the first position or the second position.

14. A pole piece manufacturing device, characterized in that: It comprises a battery pole piece cutting die as described in any one of claims 1-13.

15. Battery production line, characterized in that, Comprising the pole piece manufacturing equipment as described in claim 14.

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