Battery cell, insulating member and manufacturing method therefor, battery and electric apparatus

Abstract

The present application is applicable to the technical field of batteries. Provided are a battery cell, an insulating member and a manufacturing method therefor, a battery and an electric apparatus. The battery cell comprises a casing, an electrode assembly arranged in the casing, and an insulating member wrapped around the electrode assembly, wherein the insulating member has an identification edge, the identification edge is used for being detected by a visual device, and the identification edge is constructed to be a non-straight edge. The present application aims to improve the accuracy of capturing the boundary of an insulating member by means of a visual device, so as to identify a battery cell in which the mounting position of the insulating member is incorrect.

Description

Battery cell, insulating member and manufacturing method thereof, battery and electrical device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on April 3, 2024, with application number 202410404837.6 and application name “Battery cell, insulating part and manufacturing method thereof, battery and electrical device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of battery technology, and in particular relates to a battery cell, an insulating member and a manufacturing method thereof, a battery and an electrical device. Background Art

[0003] An insulating part is provided inside the shell of the battery cell. The insulating part can fix the electrode assembly and insulate the exposed conductor. During the batch assembly process of the battery cells, automated visual inspection equipment is used to detect whether the insulating part is installed in place. During the inspection process, the edge of the insulating part is identified to make a judgment. Since the edges of the existing insulating parts are smooth, it is not easy for the visual equipment to capture the boundary accurately, resulting in a reduced accuracy in identifying battery cells with incorrectly installed insulating parts. Summary of the Invention

[0004] In view of the above problems, the present application provides a battery cell, an insulating member and a method for manufacturing the same, a battery and an electrical device, aiming to improve the recognition accuracy of visual equipment for battery cells with incorrectly installed insulating members. Technical Solutions

[0005] To address the above-mentioned issues, in a first aspect, the present application provides a battery cell comprising a housing, an electrode assembly disposed within the housing, and an insulating member encasing the electrode assembly, wherein the insulating member has an identification edge for detection by a visual device, and the identification edge is configured as a non-straight edge. Because the identification edge is configured as a non-straight edge, its recognition is increased, and the accuracy of its capture by the visual detection device is improved, thereby enabling an accurate judgment to be made as to whether the insulating member is properly installed, thereby identifying battery cells that have been incorrectly installed, thereby ensuring the reliability of the battery cell during use, and at the same time ensuring the reliability of the electrical device.

[0006] In an embodiment of the first aspect, the marking edge is a side edge of the insulating member close to the top cover of the housing. By detecting this top side edge, i.e., the marking edge, it can be accurately determined whether the insulating member is installed in place.

[0007] In one embodiment of the first aspect, the insulating member is disposed between the housing and the electrode assembly, the shape of the insulating member being adapted to the shape of the electrode assembly, and the insulating member having wrapping sheets for wrapping respective surfaces of the electrode assembly. The insulating member is provided with an assembly and structural relationship within the housing, enabling the insulating member to be stably disposed within the housing and effectively wrapping the electrode assembly, thereby ensuring effective insulation.

[0008] In an embodiment of the first aspect, the marking edge is a serrated edge. The serrated edge is easy to process and can be formed by die-cutting the material using equipment, thereby improving the processing efficiency of the insulating part.

[0009] In one embodiment of the first aspect, the tooth shape of the marking edge is one or more of a triangle, a rectangle, a trapezoid, a semicircle, and an arc. The tooth shape is simple in structure and easy to process. It can also increase the total length of the side, forming a tortuous marking edge, which can improve accuracy when inspected by a visual device.

[0010] In one embodiment of the first aspect, the horizontal distance H1 between the crest and trough of a single tooth shape on the logo edge is 0-5 mm, and the vertical distance H2 is 0-1 mm. This results in a large number of closely spaced tooth shapes along the length of the logo edge. Because the tooth shapes are relatively small, they appear to be a thicker linear structure in macroscopic vision, significantly improving the accuracy of visual inspection and facilitating detection of the logo edge.

[0011] In an embodiment of the first aspect, the insulating member is made of soft plastic, which is generally softer and more elastic, and will not cause hard damage to the electrode assembly, thus preventing hard collisions. It also has good insulation effect, thus preventing accidents such as short circuits.

[0012] In one embodiment of the first aspect, the insulating member has a thickness of 0.1 mm to 0.15 mm. This relatively small thickness does not occupy excessive space within the housing. The thin layer of insulating member provides a light weight and volume, is convenient to install, and can provide the desired insulation effect.

[0013] In an embodiment of the first aspect, the insulating member comprises:

[0014] A bottom sheet, the bottom sheet being used to wrap the bottom of the electrode assembly;

[0015] Large sheets, the large sheets being two and respectively connected to both sides of the bottom sheet in the first direction, the large sheets being used to wrap a large surface of the electrode assembly; and

[0016] Side pieces are connected to both sides of the large piece in the second direction and are used to wrap around the sides of the electrode assembly. The first direction is perpendicular to the second direction, and at least one of the sides of the large piece and the side piece facing away from the bottom piece serves as the identification edge. The specific shape and composition of the insulating member are provided to ensure that the insulating member of the electrode assembly is well wrapped, with simple and convenient operation. Furthermore, the identification edge is formed, and detection of the identification edge can be used to detect whether the insulating member is properly installed.

[0017] In an embodiment of the first aspect, the sides of the large piece and the side piece away from the bottom piece are both the identification edges. Whether the insulating member is properly installed can be detected by detecting the identification edges.

[0018] In an embodiment of the first aspect, the insulating member is an integral member. The integral structure provides better stability, eliminates gaps, and maintains excellent overall insulation.

[0019] In an embodiment of the first aspect, the insulating member is a die-cut member. Processing the insulating member by die-cutting can achieve high processing efficiency, high speed, and guaranteed processing quality.

[0020] Secondly, the present application also provides an insulating member, which is used to be disposed within the housing of a battery cell to enclose the electrode assembly. The side edge of the insulating member adjacent to the top cover of the housing serves as an identification edge, which is used for detection by visual equipment and is constructed as a non-straight edge. Due to the non-straight identification edge, when the insulating member is installed within any compatible battery cell, the identification edge can be used to detect whether it is properly installed within the battery cell, thereby ensuring the quality of the battery cell.

[0021] In an embodiment of the second aspect, the marking edge is a serrated edge. The serrated edge is easy to process and can be formed by die-cutting raw materials using equipment, thereby improving the processing efficiency of the insulating part.

[0022] In one embodiment of the second aspect, the tooth shape of the marking edge is one or more of a triangle, rectangle, trapezoid, semicircle, and arc. Using a triangle, rectangle, trapezoid, semicircle, or arc tooth shape is simple in structure and easy to process. It can also increase the total length of the side, forming a zigzag marking edge, which can improve accuracy when inspected by visual equipment.

[0023] In a third aspect, the present application further provides a method for manufacturing an insulating member, which is used to manufacture the insulating member provided in any of the above embodiments, comprising the following steps:

[0024] Prepare ingredients;

[0025] Make knife molds;

[0026] preparing a raw material film;

[0027] Cutting the raw film into strips into preset sizes;

[0028] Using the die cutter to cut the raw material film after being cut into strips to obtain an insulating sheet;

[0029] The insulating sheet is folded to form the insulating member. This method can quickly and efficiently produce the insulating member, and the produced insulating member is of good quality and can be well applied to battery cells, achieving a good insulation protection effect.

[0030] In one embodiment of the third aspect, the cutting die is provided with a blade for cutting and forming the marking edge, and the shape of the blade is adapted to the shape of the marking edge. The shape of the marking edge can be determined by setting the blade of the cutting die, so that the tooth shape of the marking edge can be selected by the corresponding blade, thereby improving processing efficiency.

[0031] In one embodiment of the third aspect, after using the die cutter to cut the raw material film into strips to obtain the insulating sheet, and before folding the insulating sheet, the method further includes the following steps:

[0032] The insulation sheets are measured, inspected, packaged, and labeled. Unqualified insulation sheets are removed to ensure quality. Labeling is also performed. When ready for use, the insulation sheets are folded into insulating components and installed inside the housing.

[0033] Fourthly, the present application further provides a battery comprising the battery cell provided in any embodiment or provided with the insulating member provided in any embodiment. When the battery is provided with the battery cell or insulating member provided in the embodiments of the present application, the insulating member has an identifying edge, which enables accurate identification of the insulating member's position by visual inspection equipment, ensuring that the insulating member is properly installed. This simultaneously ensures the quality of the battery and improves the stability and reliability of the battery.

[0034] In a fifth aspect, the present application further provides an electrical device comprising the battery provided in the above embodiment. When the battery provided in this embodiment is used, the reliability of the electrical device is improved due to the improved reliability of the battery.

[0035] 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

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0037] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0038] FIG2 is a cross-sectional view of a battery cell according to some embodiments of the present application;

[0039] FIG3 is a schematic structural diagram of the top cover in FIG2 ;

[0040] FIG4 is a schematic structural diagram of an insulating member according to some embodiments of the present application;

[0041] FIG5 is a schematic diagram of the structure of an insulating member unfolded into an insulating sheet according to some embodiments of the present application;

[0042] FIG6 is an enlarged structural diagram of point A in FIG5 ;

[0043] FIG7 is a schematic diagram of a partial structure of a marking edge in some embodiments of the present application;

[0044] FIG8 is a schematic diagram of a partial structure of a marking edge in some embodiments of the present application;

[0045] The reference numerals in the specific embodiments are as follows: 1000, vehicle; 100, battery; 200, controller; 300, motor; 10, insulating member; 11, battery cell; 12, housing; 13, top cover; 14, identification edge; 15, insulating sheet; 151, bottom sheet; 152, large sheet; 153, side sheet. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0049] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0051] 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).

[0052] 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., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 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 embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0054] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0055] Batteries may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, and are not limited to these in the present application. Batteries may be cylindrical, flat, rectangular, or in other shapes, and are not limited to these in the present application. Batteries are generally categorized into three types based on packaging: cylindrical batteries, prismatic batteries, and pouch batteries.

[0056] To meet different power requirements, a battery can include multiple battery cells, where the multiple battery cells can be connected in series, parallel, or in a hybrid connection. Hybrid connection refers to a mixture of series and parallel connections. Optionally, multiple battery cells can first be connected in series, parallel, or in a hybrid connection to form a battery module, and multiple battery modules can then be connected in series, parallel, or in a hybrid connection to form a battery. In other words, multiple battery cells can be directly combined into a battery, or they can first be combined into battery modules, and then the battery modules can be combined into a battery. The battery is further installed in an electrical device to provide power to the device.

[0057] A battery cell is the smallest unit for storing and outputting electrical energy. A battery cell typically contains at least one electrode assembly. The electrode assembly, also known as a battery cell, is the component within the battery cell where the electrochemical reaction occurs. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator separating the two. The positive electrode sheet, separator, and negative electrode sheet can be wound together to form a rolled electrode assembly, which has a main body region and a folded region disposed at the end of the main body region. When the battery cell is charged, the positive electrode sheet generates active ions. These active ions can penetrate the pores of the separator and travel to the negative electrode sheet, where they become embedded in the negative active material. Conversely, when the battery cell is discharged, the active ions embedded in the negative active material of the negative electrode sheet are released. The released active ions can penetrate the pores of the separator and travel to the positive electrode sheet, where they become embedded in the positive active material.

[0058] The structure of the electrode assembly includes, but is not limited to, a wound structure or a laminated structure. In a wound structure, the tabs are typically welded to the current collector, and then arranged in the order of positive electrode sheet, separator, negative electrode sheet, and separator; this is then wound to form a cylindrical or square electrode assembly. In a laminated structure, the tabs are typically extended from the current collector, and the positive electrode sheet, negative electrode sheet, and separator are arranged in the order of positive electrode sheet, separator, negative electrode sheet, and separator, and then stacked layer by layer to form a laminated electrode assembly.

[0059] The battery cell also includes a shell, which has a top cover. The top cover refers to a component that covers the opening of the shell to isolate the internal environment of the battery cell from the external environment. The shape of the top cover can be adapted to the shape of the shell to match the shell. The top cover can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the top cover is not easily deformed when squeezed or collided, so that the battery cell can have higher structural strength and improved reliability. Functional components such as poles can be provided on the top cover. The pole is used to electrically connect to the electrode assembly for outputting or inputting electrical energy of the battery cell.

[0060] Typically, insulating components are applied to the surface of the electrode assembly for insulation purposes. During battery assembly, space is reserved within the battery cell housing for the electrode assembly, including the space occupied by the insulating components. This reduces the likelihood of short circuits and other issues within the battery cell. Therefore, insulating components are essential within the battery cell. The interaction of insulating components with the end caps, electrode terminals, and tabs results in a high-performance battery cell.

[0061] Therefore, proper installation of the insulation is crucial. The insulation is usually wrapped around the electrode assembly to achieve optimal insulation. Once the insulation is installed, visual inspection equipment is used to capture the edges of the insulation to determine if it is properly installed.

[0062] Machine vision inspection equipment is a device that uses machines to replace human eyes to measure and judge workpieces. The captured target is converted into an image signal through a machine vision product (i.e., an image capture device), and transmitted to a dedicated image processing system. Based on pixel distribution, brightness, color and other information, it is converted into a digital signal; the image system performs various operations on these signals to extract the characteristics of the target, and then controls the on-site equipment action or judges the structural properties of the equipment based on the judgment results.

[0063] In related operations, the visual equipment identifies the position of the insulating part by capturing the edge of the insulating part. However, in the recognition process, inaccurate capture may occur due to the smooth edges.

[0064] Therefore, in response to the above problems, the present application provides a battery cell 11 that can solve the above problems.

[0065] The present application also provides a battery 100 , which includes the above-mentioned battery cell 11 , thereby ensuring that the insulating member 10 can be well captured and identified, and ensuring that the insulating member 10 is installed in place.

[0066] The present application also provides an electrical device, and the battery 100 provided in the present application can be applied to the electrical device, that is, an electrical device that uses the battery 100 as a power source or various energy storage systems that use the battery 100 as an energy storage element. Among them, the electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can 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 can include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0067] The battery 100 disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles 1000, ships, or aircraft. Electrical devices can use a power supply system equipped with the battery 100 disclosed in this application, which helps improve the reliability of the electrical devices.

[0068] For the convenience of description, the following embodiments are described by taking the electric device provided in the embodiments of the present application as a vehicle 1000 as an example.

[0069] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can 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 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. 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.

[0070] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also 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.

[0071] The battery cell may be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell that can be recharged to activate the active material after the battery cell is discharged and can continue to be used, and a primary battery refers to a battery cell that cannot be recharged to activate the active material after the battery cell's power is exhausted and can continue to be used. The battery cell may also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., but is not limited thereto. The battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries, etc. This application has no particular limitations.

[0072] As a specific embodiment of the battery cell 11 provided in the present application, please refer to Figures 2, 3, 4, 5, 6, 7 and 8. The battery cell 11 includes a shell 12, an electrode assembly arranged in the shell 12, and an insulating member 10 that wraps the electrode assembly. The insulating member 10 has an identification edge. The identification edge 14 is used for detection by visual equipment, and the identification edge 14 is constructed as a non-straight edge.

[0073] Specifically, the insulating part 10 in the battery cell 11 provided in this embodiment can be processed by die-cutting process or injection molding, punching and other processes. Specifically, the insulating sheet 15 that meets the size requirements is obtained by stamping or cutting the raw material, and then folded to form a usable insulating part 10.

[0074] 4 and 5 , when in use, the insulating member 10 is folded to form a shape that conforms to the outer contour of the electrode assembly, thereby wrapping the electrode assembly. The insulating member 10 has a marking edge 14, which is used for detection and capture by visual equipment.

[0075] In the related art, the edges of the insulating parts are usually smoother, so it is not easy to capture them accurately, which often leads to incorrect judgment of the installation position of the insulating parts, thereby affecting the insulation and reliability of the battery cell 11, and further affecting the reliability of the entire battery 100 and the use of electrical devices.

[0076] Therefore, this embodiment provides that the marking edge 14 is a non-straight edge, or it can also be called a burr edge, that is, the marking edge 14 is a relatively rough edge, which can improve the accuracy of capturing this marking edge 14 when the visual detection equipment is inspected, thereby ensuring the correct installation position of the insulating part 10.

[0077] The so-called non-straight edge, that is, the identification edge 14 is not a straight edge, it can be a wavy curved edge, or a convex and concave wrinkled edge. When it is a non-straight edge, it is equivalent to increasing the degree of curvature of the edge while keeping the distance between the two end points of the edge unchanged, forming a burr structure, which can increase recognition.

[0078] The effect of this embodiment is that since the marking edge 14 is made into a non-straight edge, the recognition is increased and the accuracy of being captured by the visual detection equipment is improved, so that an accurate judgment can be made on whether the insulating part 10 is installed in place, and the battery cell 11 with the incorrect installation position of the insulating part 10 can be identified, thereby ensuring the reliability of the battery cell 11 during use and the reliability of the use of the electrical device.

[0079] In some embodiments, referring to FIG. 2 and FIG. 4 , the identification edge 14 is the side of the insulating member 10 close to the top cover 13 of the housing 12 .

[0080] Specifically, when wrapping, the insulating member 10 does not wrap the upper end surface of the electrode assembly, that is, it does not wrap the end surface of the electrode assembly on one side close to the top cover 13 of the shell 12, but wraps all other surfaces. Therefore, at the end close to the top cover 13 of the shell 12, the insulating member 10 forms a side edge. When the boundary is captured by a visual device, this side edge is used as the capture object. When the position of this side edge is set correctly, it means that the insulating member 10 is installed in place. Therefore, this embodiment refers to this side edge as the identification edge 14.

[0081] The effect is that by detecting the top side edge, namely the marking edge 14 , it is possible to accurately determine whether the insulating member 10 is installed in place.

[0082] In some embodiments, referring to FIG. 2 and FIG. 4 , the insulating member 10 is disposed between the shell 12 and the electrode assembly. The shape of the insulating member 10 matches the shape of the electrode assembly. The insulating member 10 has wrapping sheets for wrapping each side of the electrode assembly.

[0083] Specifically, the electrode assembly is disposed within the housing 12, and the insulating member 10 wraps the electrode assembly. Therefore, the insulating member 10 is disposed between the housing 12 and the electrode assembly, providing excellent insulation. Furthermore, a wrapping sheet is disposed correspondingly to each surface of the electrode assembly. Multiple wrapping sheets correspond to respective surfaces of the electrode assembly, wrapping the electrode assembly. The shape of each surface can be adapted to the shape of the surface of the electrode assembly it wraps. This ensures that the shape of the entire insulating member 10 matches the shape of the electrode assembly.

[0084] The effect of this embodiment is that it provides an assembly relationship and structural relationship between the insulating member 10 in the shell 12, so that the insulating member 10 can be stably arranged inside the shell 12 and well wrap the electrode assembly to ensure the insulation effect.

[0085] In some embodiments, referring to FIG. 5 and FIG. 6 , the marking edge 14 is a toothed edge.

[0086] Specifically, the toothed edge, i.e., the marking edge 14, is a toothed edge, which is formed by a number of teeth arranged evenly or unevenly in the length direction of the marking edge 14. The shapes of the teeth can be the same or different, and the teeth at both ends connect the two end points of the marking edge 14 respectively.

[0087] When it is a toothed edge, although the straight-line distance between the two end points of the side remains unchanged, the total side length is increased, forming a burr structure and improving the capture accuracy of the visual inspection equipment.

[0088] The effect of this embodiment is that the serrated edge is easy to process and can be formed by die-cutting the raw material through equipment, thereby improving the processing efficiency of the insulating member 10.

[0089] In some embodiments, referring to FIG. 6 to FIG. 8 , the tooth shape of the marking edge 14 is one or more of a triangle, a rectangle, a trapezoid, a semicircle, and an arc.

[0090] Specifically, the tooth shape may be one or more of a triangle, a rectangle, a trapezoid, a semicircle, and an arc.

[0091] When it is a triangle, it can be an isosceles triangle, an equilateral triangle, etc. When it is a rectangle, it can be a rectangle, a square, etc. When it is a trapezoid, it can be an isosceles trapezoid, etc. It can also be a semicircle or an arc, and when it is an arc, it can be a circular arc or an elliptical arc.

[0092] Meanwhile, the tooth shape can be a variety of the above shapes, such as a triangle, a trapezoid, an arc, or a combination of other tooth shapes.

[0093] It should be noted that the multiple tooth shapes are arranged in the same direction, that is, the two endpoints of each tooth shape are connected to the endpoints of the adjacent tooth shape, and the multiple endpoints are arranged in the same direction, and finally connect the two ends of the entire edge.

[0094] This embodiment uses triangular, rectangular, trapezoidal, semicircular, and arc-shaped tooth shapes. The tooth shape has a simple structure and is easy to process. It can also increase the total length of the side to form a tortuous marking edge 14, which can improve accuracy when visual equipment is used for detection.

[0095] In some embodiments, as shown in FIG6 , FIG7 and FIG8 , the horizontal distance H1 between the crest and the trough of a single tooth shape on the marking edge 14 is 0-5 mm, and the vertical distance H2 is 0-1 mm.

[0096] Specifically, a single tooth shape is a triangle, trapezoid, rectangle, or semicircle, arc, etc. Therefore, there is a highest end and a lowest end for the tooth shape. For example, for a triangle, semicircle, and arc, refer to Figure 6 , the crest is the highest end of the tooth shape, i.e., the highest point, while the trough is located at the two ends of the tooth shape, i.e., the lowest points. Refer to Figures 7 and 8 , for another example, for a rectangle or trapezoid, since its highest end is a line segment, the crest can be selected at the middle position of the line segment, while the trough is the lowest position at the two ends.

[0097] Therefore, for any tooth shape, this embodiment provides a horizontal distance H1 between a crest and a trough of 0-5 mm, and a vertical distance H2 between a crest and a trough of 0-1 mm.

[0098] This embodiment provides the distance between the peak and the trough, including the horizontal distance and the vertical distance, which is equivalent to providing the size of the tooth shape, so that the tooth shape is set smaller, so that a plurality of tooth shapes arranged more densely will be formed in the length direction of the identification edge 14, and because the tooth shape is small, the plurality of tooth shapes will form a thicker linear structure in the macroscopic vision, which greatly improves the accuracy of the visual equipment detection and makes it easier to capture the identification edge 14.

[0099] In some embodiments, the insulating member 10 is made of soft plastic. Soft plastic is a plastic material such as polypropylene (PP), polyethylene (PE), or polyvinyl chloride (PVC). Soft plastic is soft, lightweight, durable, and has good insulation properties, providing excellent insulation and protection.

[0100] Specifically, the soft plastic can be polypropylene, which has good heat resistance and tensile strength. It can also be polyethylene, which is non-toxic, odorless, and resistant to bending and low temperatures. Polyvinyl chloride has good corrosion resistance and wear resistance.

[0101] Compared with hard plastic, soft plastic is usually softer and more elastic, will not cause hard damage to the electrode components, prevent hard collisions, and has good insulation effect to prevent accidents such as short circuits.

[0102] In some embodiments, the thickness of the insulating member is 0.1 mm to 0.15 mm.

[0103] The thickness of the insulating member 10 is 0.1mm-0.15mm, which is relatively small, so it will not occupy too much space inside the shell 12. Its thickness is only a thin layer, with light weight and volume, and is very convenient to set up, and can achieve the technical effect of insulation.

[0104] 4 and 5 , the insulating member 10 can be an integral structure formed by folding a sheet-like insulating sheet 15 .

[0105] Specifically, the insulating part 10 is a folded structure, and its shape is adapted to the outer contour of the electrode assembly. It can be formed by folding the insulating sheet 15. The insulating sheet 15 has a certain shape and can form the shape of the insulating part 10 after being folded in a preset manner, thereby wrapping the electrode assembly.

[0106] The insulating sheet 15 is in the form of a plane, has a shape as required, and can be folded into the insulating member 10 of a specified shape.

[0107] The insulating sheet 15 and the insulating member 10 are made of the same material and are different states of the same structure.

[0108] The insulating member 10 is formed by folding the insulating sheet 15, which facilitates the processing and formation of the insulating member 10. Because the insulating sheet 15 is flat, it is easy to make. After the insulating sheet 15 is made, it is folded to form the insulating member 10, which is simpler than directly making the folded insulating member 10.

[0109] In some embodiments, referring to FIG. 4 and FIG. 5 , the insulating member 10 includes a bottom sheet 151 , a large sheet 152 , and side sheets 153 .

[0110] The bottom sheet 151 is used to wrap the bottom of the electrode assembly; there are two large sheets 152 and they are respectively connected to the two sides of the bottom sheet 151 in the first direction, and the large sheets 152 are used to wrap the large surface of the electrode assembly; the side sheets 153 are connected to the two sides of the large sheet 152 in the second direction, and the side sheets 153 are used to wrap the sides of the electrode assembly. The first direction is perpendicular to the second direction, and at least one of the sides of the large sheet and the side sheet away from the bottom sheet is provided with an identification edge.

[0111] The insulating member 10 includes a bottom sheet 151, a large sheet 152, and side sheets 153. Before being folded, the insulating member 10 is the insulating sheet 15. The bottom sheet 151 wraps around the bottom of the electrode assembly after being folded. Two large sheets 152 are connected to both sides of the bottom sheet 151 in a first direction. After being folded, the large sheets 152 wrap around the large surface of the electrode assembly. The side sheets 153 are connected to both sides of the large sheet 152 in a second direction. After being folded, the side sheets 153 wrap around the sides of the electrode assembly. The first direction is perpendicular to the second direction.

[0112] As shown in FIG5 , the first direction is the X direction in FIG3 , and the second direction is the Y direction in FIG3 .

[0113] Specifically, the surfaces of the battery cell 11, or the housing 12, are generally referred to as the bottom, large surface, side, and top surfaces. A cover is provided on the top surface, and the end opposite the top surface is the bottom surface. The surfaces between the bottom and top surfaces are referred to as the large surface and side surfaces, with the large surface being the larger of the two and the side surfaces being the smaller. Since the electrode assembly conforms to the shape of the housing 12 and is disposed within the housing 12, the surfaces of the electrode assembly can also be referred to as the bottom, large surface, side, and top surfaces. Since the insulating member 10 is disposed within the housing 12 of the battery cell 11 and surrounds the electrode assembly, its shape is similar or compatible to that of the housing 12 or the electrode assembly to a certain extent. Therefore, in this case, the insulating member 10 is correspondingly divided into a bottom sheet 151, a large sheet 152, and a side sheet 153. When installed within the housing 12, the bottom sheet 151 corresponds to the bottom surface of the electrode assembly, the large sheet 152 corresponds to the large surface of the electrode assembly, and the side sheet 153 corresponds to the side surface of the electrode assembly.

[0114] Since the battery cell 11 and the electrode assembly share a single bottom surface, the insulating member 10 also has a single bottom sheet 151. Since the battery cell 11 and the electrode assembly each have two large surfaces, a large sheet 152 is provided on each side of the bottom sheet 151 in the first direction. After the large sheet 152 is folded, it forms a 90-degree angle with the bottom sheet 151. Thus, the two large sheets 152 can be provided corresponding to the two large surfaces. Side sheets 153 are connected to both sides of the large sheet 152 in the second direction. After the large sheet 152 is folded, the side sheets 153 are folded again, so that the side sheets 153 are provided corresponding to the side surfaces of the electrode assembly.

[0115] In some cases, side panels 153 may be provided on both sides of a large panel 152, or as shown in FIG3, side panels 153 may be provided on both sides of two large panels 152. When two side panels 153 are provided at the same time, the two side panels 153 on the same side may be folded to cross or be connected to form a form that wraps the side of the electrode assembly.

[0116] At least one of the side edges of the large sheet 152 and the side sheet 153 away from the bottom sheet 151 is provided with a logo edge 14 .

[0117] Specifically, the side edge of one large piece 152 away from the bottom film 151 may be the identification edge 14, or the side edges of two large pieces 152 away from the bottom film 151 may be the identification edge 14, or the side edge of one side piece 153 away from the bottom film 151 may be the identification edge 14, or the side edges of two side pieces 153 away from the bottom film 151 may be the identification edge 14, or the side edges of one large piece 152 and one side piece 153 away from the bottom film 151 may be the identification edge 14, or the side edges of all large pieces 152 and all side pieces 153 away from the bottom film 151 may be the identification edge 14.

[0118] The effect of this embodiment is that the specific shape and composition of the insulating member 10 are provided, so that the electrode assembly can be well wrapped, and the operation is simple and convenient.

[0119] In some embodiments, referring to Figures 4 and 5 , preferably, the sides of the large piece 152 and the side pieces 153 away from the bottom sheet are both identification edges 14. After folding in the above manner, the sides of the large piece 152 and the side pieces 153 away from the bottom sheet 151 form the top edge of the entire insulating member 10, which is arranged around the top cover 13. When the insulating member 10 is installed in place, the top edge forms the identification edge 14. By detecting the identification edge 14, it can be detected whether the insulating member 10 is installed in place.

[0120] The effect of this embodiment is that the marking edge 14 is formed, and whether the insulating member 10 is installed in place can be detected by detecting the marking edge 14 .

[0121] In some embodiments, the insulating member 10 is a single piece. That is, all surfaces are connected to form a one-piece structure. Specifically, it can be formed by folding a single piece of insulating sheet 10. The advantage of this one-piece structure is that it has better integrity and will not split or separate during use, nor will it cause gaps due to loose joints.

[0122] In some embodiments, the insulating member 10 is a die-cut member. Die-cutting the insulating member can improve processing efficiency, speed, and ensure processing quality.

[0123] The present application also provides an embodiment of an insulating part 10. In this embodiment, the insulating part 10 is used to be arranged in the shell 12 of the battery cell 11 to wrap the electrode assembly. The side edge of the insulating part 10 close to the top cover 13 of the shell 12 is an identification edge 14. The identification edge 14 is used for detection by visual equipment. The identification edge 14 is constructed as a non-straight edge.

[0124] Similarly, this embodiment provides an insulating member 10 for the interior of the above-mentioned battery cell 11, which can wrap the electrode assembly and has an identification edge 14. The side of the insulating member 10 close to the top cover 13 of the shell 12 is the identification edge 14, and the identification edge 14 is constructed as a non-straight edge.

[0125] The effect is that, due to the non-straight marking edge 14 , when the insulating member 10 is installed inside any compatible battery cell 11 , the marking edge 14 can be used to detect whether it is properly installed inside the battery cell 11 , thereby ensuring the quality of the battery cell 11 .

[0126] In some embodiments, the marking edge 14 is a serrated edge. The serrated edge is easy to process and can be formed by die-cutting the raw material using equipment, thereby improving the processing efficiency of the insulating member 10.

[0127] In some embodiments, the tooth shape of the marking edge 14 is one or more of a triangle, rectangle, trapezoid, semicircle, and arc. Using a triangle, rectangle, trapezoid, semicircle, or arc tooth shape is simple in structure and easy to process. It can also increase the total length of the side, forming a zigzag marking edge 14, which can improve accuracy when inspected by a visual device.

[0128] As an embodiment provided in the present application, an insulating part 10 is used to be arranged in the shell 12 of the battery cell 11 to wrap the electrode assembly. The side of the insulating part 10 close to the top cover 13 of the shell 12 is an identification edge 14. The identification edge 14 is used for detection by visual equipment. The identification edge 14 is constructed as a toothed edge. The tooth shape is one or more of a triangle, a rectangle, a trapezoid, a semicircle, and an arc. The horizontal distance H1 between the peak and the trough of a single tooth on the identification edge 14 is 0-5mm, and the vertical distance H2 is 0-1mm. The material of the insulating part 10 is soft plastic. The thickness of the insulating part 10 is 0.1mm-0.15mm. The insulating member 10 includes a bottom sheet 151, a large sheet 152, and side sheets 153. The bottom sheet 151 is used to wrap the bottom of the electrode assembly. Two large sheets 152 are connected to both sides of the bottom sheet 151 in the first direction and are used to wrap the large surface of the electrode assembly. The side sheets 153 are connected to both sides of the large sheet 152 in the second direction and are used to wrap the side surfaces of the electrode assembly. The first direction is perpendicular to the second direction. The sides of the large sheet 152 and the side sheets 153 away from the bottom sheet 151 are both identification edges 14. The insulating member 10 is a one-piece die-cut component.

[0129] The present application also provides a method for manufacturing an insulating member, which is used to manufacture the insulating member 10 provided in the above embodiments.

[0130] The insulating member manufacturing method provided in this embodiment can quickly obtain the insulating member 10 , and the processing method is simple and fast, which greatly improves the preparation efficiency of the insulating member 10 .

[0131] The following steps are involved:

[0132] Prepare ingredients;

[0133] Make knife molds;

[0134] preparing a raw material film;

[0135] Cut the raw film into strips into preset sizes;

[0136] Using a die cutter to cut the raw material film into strips, an insulating sheet 15 is obtained;

[0137] The insulating sheet 15 is folded to form the insulating member 10 .

[0138] Specifically, material preparation involves preparing the raw materials for forming the insulating element 10. This process typically involves multiple raw materials, typically provided in a roll format that can be rotated for easy access, similar to the layout of commonly used rolls of adhesive tape. The raw materials can include polypropylene (PP), polyethylene (PE), or polyvinyl chloride (PVC). The insulating element 10 is formed by laminating two or more materials.

[0139] Two or more materials need to be bonded together to form a whole. The bonding of the two materials can be performed by a bonding machine, which can achieve bonding between the materials. After bonding, a raw material film for preparing the insulating member 10 can be formed.

[0140] The cutting die is a structure used to cut the raw material film. The blade of the cutting die is arranged in a form that matches the shape of the insulating sheet 15 to be cut. Specifically, the cutting die is a columnar structure, and the blade is set on the surface of the column. When cutting, the raw material film moves in a straight line, and the cutting die rotates continuously. When passing through the cutting die, the blade of the rolling cutting die is attached to the raw material film to cut the raw material film. After the cutting die rotates one circle, all the blades are pressed on the raw material film one after another to achieve cutting of the raw material film to form an insulating sheet 15.

[0141] However, before cutting the raw film, the size of the raw film needs to be adjusted to cut into a suitable width. That is, the raw film is cut into strips of a predetermined size, and the width can be slightly larger than the width of the insulating sheet 15. After the insulating sheet 15 is cut out, it is folded to form the insulating member 10.

[0142] The effect of this embodiment is that it provides a method for manufacturing the insulating member 10, which can quickly and efficiently manufacture the insulating member 10. The manufactured insulating member 10 is of good quality and can be well applied to the battery cell 11, achieving a good insulation protection effect.

[0143] In some embodiments, a blade for cutting and forming the marking edge 14 is provided on the cutting die, and the shape of the blade is adapted to the shape of the marking edge 14 .

[0144] Specifically, the cutting die rotates to bring the blade into contact with the raw film, thereby cutting the raw film. Different blades cut different edges of the insulating sheet 15, while the blade used to cut and form the marking edge 14 is adapted to the shape of the marking edge 14. Adaptation means that the tooth profile of the blade and the tooth profile of the marking edge 14 are the same. If the tooth profile of the blade is triangular, the tooth profile of the cut marking edge 14 is also triangular. Therefore, the tooth profile of the marking edge 14 can be determined by setting the tooth profile of the blade on the cutting die.

[0145] The effect of this embodiment is that the shape of the marking edge 14 can be determined by setting the blade of the cutting die, so that the tooth shape of the marking edge 14 can be selected by the corresponding blade, thereby improving the processing efficiency.

[0146] In some embodiments, after the raw material film is cut by the die, the process also includes collecting and processing the resulting scraps.

[0147] Specifically, when the raw material film is cut, scraps will be formed, so the scraps need to be processed, which keeps the processing equipment clean and tidy, which is conducive to continuous production.

[0148] The scraps are the remaining parts after the insulating sheet 15 is cut out from the raw material film, that is, the unused parts are removed and cleaned up as scraps.

[0149] In some embodiments, after using a die cutter to cut the raw material film into strips to obtain the insulating sheet 15 and before folding the insulating sheet 15, the following steps are further included:

[0150] The insulation sheet 15 is subjected to dimension measurement, appearance inspection, packaging and labeling operations.

[0151] This is equivalent to inspecting the quality of the insulating sheet 15, removing unqualified insulating sheets 15, ensuring the quality of the insulating sheet 15, and labeling the insulating sheet 15. When ready for use, the insulating sheet 15 is folded into an insulating member 10 and installed inside the housing 12.

[0152] As an embodiment provided in the present application, a method for manufacturing an insulating part 10 includes preparing materials; making a cutting die, on which a blade for cutting to form an identification edge 14 is provided, and the shape of the blade is adapted to the shape of the identification edge 14; preparing a raw material film; cutting the raw material film into strips into preset sizes; using the cutting die to cut the raw material film after strip cutting to obtain an insulating sheet 15; measuring the size, inspecting the appearance, and packaging and labeling the insulating sheet 15; and folding the insulating sheet 15 when in use to form the insulating part 10.

[0153] The present application also provides an embodiment of a battery 100 , which includes the battery cell 11 provided in any of the above embodiments or is provided with the insulating member 10 provided in any of the above embodiments.

[0154] The effect is that after the battery 100 is provided with the battery cell 11 provided in this embodiment or the insulating part 10 provided in the embodiment of the present application, since the insulating part 10 has an identification edge 14, the position of the insulating part 10 can be accurately identified when it is identified by visual inspection equipment, ensuring that the insulating part 10 is installed in place. This also ensures the quality of the battery 100 and improves the stability and reliability of the use of the battery 100.

[0155] The present application also provides an electrical device, which includes the battery 100 provided in the above embodiment. When the battery 100 provided in this embodiment is used, the reliability of the electrical device is improved because the reliability of the battery 100 is improved.

[0156] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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 cell, characterized in that: The battery cell includes a shell, an electrode assembly disposed in the shell, and an insulating member wrapping the electrode assembly. The insulating member has an identification edge for detection by a visual device, and the identification edge is configured as a non-straight edge.

2. The battery cell according to claim 1, wherein The marking edge is the side edge of the insulating member close to the top cover of the shell.

3. The battery cell according to claim 1 or 2, wherein: The insulating member is arranged between the shell and the electrode assembly. The shape of the insulating member is adapted to the shape of the electrode assembly. The insulating member has wrapping sheets respectively used to wrap each surface of the electrode assembly.

4. The battery cell according to any one of claims 1 to 3, characterized in that: The marking edge is a toothed edge.

5. The battery cell according to claim 4, wherein: The tooth shape of the marking edge is one or more of a triangle, a rectangle, a trapezoid, a semicircle, and an arc.

6. The battery cell according to claim 4 or 5, characterized in that: The horizontal distance H1 between the wave crest and the wave trough of a single tooth shape on the marking edge is 0-5 mm, and the vertical distance H2 is 0-1 mm.

7. The battery cell according to any one of claims 1 to 6, characterized in that: The insulating member is made of soft plastic.

8. The battery cell according to any one of claims 1 to 7, wherein: The thickness of the insulating member is 0.1 mm to 0.15 mm.

9. The battery cell according to any one of claims 1 to 8, characterized in that: The insulating member comprises: A bottom sheet, the bottom sheet being used to wrap the bottom of the electrode assembly; Large sheets, the large sheets being two and respectively connected to both sides of the bottom sheet in the first direction, the large sheets being used to wrap a large surface of the electrode assembly; and Side pieces, the side pieces being connected to both sides of the large piece in the second direction, the side pieces being used to wrap the side surfaces of the electrode assembly, the first direction being perpendicular to the second direction; At least one of the side edges of the large piece and the side piece away from the bottom piece is the logo edge.

10. The battery cell according to claim 9, wherein: The sides of the large piece and the side pieces away from the bottom piece are both the logo edges.

11. The battery cell according to any one of claims 1 to 10, characterized in that: The insulating member is an integral member.

12. The battery cell according to any one of claims 1 to 11, characterized in that: The insulating part is a die-cut part.

13. An insulating member, characterized in that: The insulating member is used to be arranged in the shell of the battery cell to wrap the electrode assembly. The side of the insulating member close to the top cover of the shell is the identification edge, which is used for detection by visual equipment and is constructed as a non-straight edge.

14. The insulating member according to claim 13, wherein The marking edge is a toothed edge.

15. The insulating member according to claim 14, wherein The tooth shape of the marking edge is one or more of a triangle, a rectangle, a trapezoid, a semicircle, and an arc.

16. A method for manufacturing an insulating member, characterized in that: The method for producing the insulating member according to any one of claims 13 to 15 comprises the following steps: preparing materials; Make knife molds; preparing a raw material film; Cutting the raw film into strips into preset sizes; Using the die cutter to cut the raw material film after being cut into strips to obtain an insulating sheet; The insulating sheet is folded to form the insulating member.

17. The method for manufacturing an insulating member according to claim 16, wherein: The cutting die is provided with a blade for cutting and forming the marking edge, and the shape of the blade is adapted to the shape of the marking edge.

18. The method for manufacturing an insulating member according to claim 16 or 17, wherein: After using the die cutter to cut the raw material film into strips to obtain an insulating sheet, and before folding the insulating sheet, the method further includes the following steps: Perform dimension measurement, appearance inspection, packaging and labeling operations on insulation sheets.

19. A battery, characterized in that: The battery comprises the battery cell according to any one of claims 1 to 12 or is provided with the insulating member according to any one of claims 13 to 15.

20. An electrical device, characterized in that: The electrical device comprises the battery according to claim 19.

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