Battery cell, insulating piece and manufacturing method thereof, battery and electric device

Abstract

The application is suitable for the technical field of batteries, and provides a battery monomer, an insulating piece and a manufacturing method thereof, a battery and an electric device. The battery monomer comprises a shell, an electrode assembly arranged in the shell, and an insulating piece wrapping the electrode assembly. The insulating piece has a marking edge for being detected by a visual equipment. The marking edge is configured as a non-flat edge. The application aims to improve the boundary capturing accuracy of the visual equipment on the insulating piece to identify the battery monomer with incorrect installation position of the insulating piece.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a battery cell, an insulating component and its manufacturing method, a battery and an electrical device. Background Technology

[0002] Inside the casing of a battery cell, there is an insulating component that serves to fix the electrode assembly and provide insulation protection for the exposed conductors. During the mass assembly of battery cells, automated vision inspection equipment is used to check whether the insulating component is installed in place. The inspection process is based on the identification of the edge of the insulating component. However, because the edges of the existing insulating components are smooth, the vision equipment does not easily capture the boundary accurately, which reduces the accuracy of identifying battery cells with incorrectly installed insulating components. Summary of the Invention

[0003] In view of the above problems, this application provides a battery cell, an insulating component and a method for manufacturing the same, a battery and an electrical device, aiming to improve the accuracy of vision equipment in identifying battery cells with incorrectly installed insulating components.

[0004] To address the aforementioned problems, in a first aspect, this application provides a battery cell, including a housing, an electrode assembly disposed within the housing, and an insulating member enclosing the electrode assembly. The insulating member has a marking edge for detection by a visual device, and the marking edge is constructed as a non-straight edge. Because the marking edge is non-straight, its recognizability is increased, improving the accuracy of detection by the visual device. This allows for accurate judgment of whether the insulating member is properly installed, thereby identifying inaccurately installed battery cells, ensuring the reliability of the battery cell during use, and simultaneously guaranteeing the reliability of the electrical device.

[0005] In one embodiment of the first aspect, the marking edge is the side of the insulating member near the top cover of the housing. By detecting this top side, i.e., the marking edge, it can be accurately determined whether the insulating member is installed in place.

[0006] 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 pieces for wrapping each side of the electrode assembly. This provides an assembly and structural relationship for the insulating member within the housing, enabling the insulating member to be stably disposed within the housing and to effectively wrap the electrode assembly, ensuring insulation performance.

[0007] In one embodiment of the first aspect, the marking edge is a toothed edge. Toothed edges are easy to process; they can be formed by die-cutting the material using equipment, thus improving the processing efficiency of the insulating component.

[0008] In one embodiment of the first aspect, the tooth shape of the marking edge is one or more of the following: triangle, rectangle, trapezoid, semicircle, and arc. The tooth shape has a simple structure, is easy to process, and can increase the total length of the side, forming a meandering marking edge, which can improve accuracy when inspected by vision equipment.

[0009] In one embodiment of the first aspect, the horizontal distance H1 between the peaks and troughs of a single tooth on the marking edge is 0-5 mm, and the vertical distance H2 is 0-1 mm. This results in a large number of densely arranged teeth along the length of the marking edge. Because the teeth are small, the multiple teeth create a coarser linear structure in a macroscopic visual appearance, greatly improving the accuracy of the visual device's detection and facilitating the capture of the marking edge.

[0010] In one embodiment of the first aspect, the insulating element is made of soft plastic. Soft plastic is generally more flexible and elastic, which will not cause hard damage to the electrode assembly, prevent hard impacts, and has good insulation effect to prevent accidents such as short circuits.

[0011] In one embodiment of the first aspect, the thickness of the insulating element is 0.1mm-0.15mm. This relatively small thickness avoids taking up excessive space inside the housing; being only a thin layer, it has a light weight and volume, is easy to install, and effectively provides insulation.

[0012] In one embodiment of the first aspect, the insulating element includes:

[0013] A film for wrapping the bottom of the electrode assembly;

[0014] Large sheets, comprising two sheets respectively connected to opposite sides of the substrate in a first direction, the large sheets being used to wrap the large surface of the electrode assembly; and

[0015] Side plates are connected to both sides of the large sheet in a second direction. These side plates are used to wrap the sides of the electrode assembly. The first direction is perpendicular to the second direction. At least one of the sides of the large sheet and the side plates away from the base sheet is the marking edge. The specific shape and composition of the insulating element are provided, enabling it to effectively wrap the insulating element of the electrode assembly. Operation is simple and convenient, and the marking edge is formed, allowing detection of whether the insulating element is properly installed by checking the marking edge.

[0016] In one embodiment of the first aspect, the sides of both the large sheet and the side sheet furthest from the base sheet are designated as the marking edges. Detection of the marking edges allows for the assessment of whether the insulating component is properly installed.

[0017] In one embodiment of the first aspect, the insulating element is a single piece. This single-piece structure provides better stability, eliminates gaps, and maintains excellent overall insulation.

[0018] In one embodiment of the first aspect, the insulating element is a die-cut part. Die-cutting the insulating element results in high processing efficiency, high speed, and guaranteed processing quality.

[0019] Secondly, this application also provides an insulating member for placement within the housing of a battery cell to enclose the electrode assembly. The insulating member has a marking edge near the top cover of the housing, which is used for detection by a visual device. This marking edge is non-straight. Due to the non-straight marking edge, when the insulating member is installed inside any compatible battery cell, its installation within the battery cell can be detected through the marking edge, ensuring the quality of the battery cell.

[0020] In one embodiment of the second aspect, the marking edge is a toothed edge. Toothed edges are easy to process; they can be formed by die-cutting raw materials using equipment, thus improving the processing efficiency of the insulating parts.

[0021] In one embodiment of the second aspect, the tooth shape of the marking edge is one or more of the following: triangle, rectangle, trapezoid, semicircle, and arc. Using triangular, rectangular, trapezoidal, semicircular, or arc-shaped teeth results in a simple and easy-to-process structure, increases the total length of the sides, and forms a meandering marking edge, thereby improving accuracy during visual inspection.

[0022] Thirdly, this application also provides a method for manufacturing an insulating component, used to manufacture the insulating component provided in any of the above embodiments, comprising the following steps:

[0023] Material preparation;

[0024] Making die-cutting molds;

[0025] Preparation of raw material membrane;

[0026] The raw material film is slit and cut into preset sizes;

[0027] The raw material film, after being slit, is cut using the aforementioned die to obtain an insulating sheet;

[0028] The insulating sheet is folded to form the insulating component. This method allows for the rapid and efficient fabrication of insulating components, producing high-quality components that can be effectively applied to battery cells, providing excellent insulation protection.

[0029] In one embodiment of the third aspect, the die-cutting mold is provided with a cutting edge for cutting to form the marking edge, the shape of the cutting edge being adapted to the shape of the marking edge. By setting the cutting edge of the die-cutting mold, the shape of the marking edge can be determined, allowing the tooth shape of the marking edge to be selected by the corresponding cutting edge, thereby improving processing efficiency.

[0030] In one embodiment of the third aspect, after the step of cutting the slit-cut raw material film using the die to obtain an insulating sheet, and before folding the insulating sheet, the following steps are further included:

[0031] The insulating sheets undergo dimensional measurement, visual inspection, and encapsulation and labeling. Defective insulating sheets are removed to ensure quality, and labels are then applied. Before use, the insulating sheets are folded into insulating components and installed inside the housing.

[0032] Fourthly, this application also provides a battery, including the battery cell described in any embodiment or having the insulating member described in any embodiment. When the battery is equipped with the battery cell or insulating member provided in the embodiments of this application, because the insulating member has a marking edge, its position can be accurately identified using a visual inspection device, ensuring that the insulating member is installed correctly. This simultaneously ensures the quality of the battery and improves the stability and reliability of its use.

[0033] Fifthly, this application also provides an electrical device, which includes the battery described in the above embodiments. When the battery provided in this embodiment is used, the reliability of the electrical device is improved because the reliability of the battery is enhanced.

[0034] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0036] In the attached diagram:

[0037] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0038] Figure 2This is a cross-sectional view of a battery cell according to some embodiments of this application;

[0039] Figure 3 for Figure 2 Schematic diagram of the top cover structure;

[0040] Figure 4 This is a schematic diagram of the structure of the insulating element in some embodiments of this application;

[0041] Figure 5 This is a schematic diagram of the structure of an insulating element unfolded into an insulating sheet according to some embodiments of this application;

[0042] Figure 6 for Figure 5 Enlarged structural diagram at point A;

[0043] Figure 7 This is a partial structural diagram of the identifier edge in some embodiments of this application;

[0044] Figure 8 This is a partial structural diagram of the identifier edge in some embodiments of this application;

[0045] The reference numerals in the detailed embodiments are as follows:

[0046] 1000, vehicles;

[0047] 100. Battery; 200. Controller; 300. Motor;

[0048] 10. Insulating components; 11. Battery cells; 12. Housing; 13. Top cover; 14. Marking edge; 15. Insulating sheet; 151. Base sheet; 152. Large sheet; 153. Side sheet. Detailed Implementation

[0049] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0054] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0055] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0058] Batteries can include lithium-ion rechargeable batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and this application embodiment is not limited to these. Batteries can be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited to these either. Batteries are generally classified into three types according to their packaging method: cylindrical batteries, cuboid batteries, and pouch batteries.

[0059] To meet diverse power demands, a battery can comprise multiple individual battery cells, which can be connected in series, parallel, or a combination of both. Optionally, multiple battery cells can first be connected in series, parallel, or a combination to form a battery module, and then these battery modules can be connected in series, parallel, or a combination to form a battery. In other words, multiple battery cells can directly form a battery, or they can first be assembled into battery modules, and then the battery modules can be assembled into a battery. The battery is then further installed in electrical equipment to provide power to that equipment.

[0060] A battery cell is the smallest unit for storing and outputting electrical energy. Each battery cell typically contains at least one electrode assembly. This electrode assembly, also called a cell, is the part of the battery cell where electrochemical reactions occur. The electrode assembly includes a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes. The positive electrode, separator, and negative electrode can be wound to form a roll-shaped electrode assembly, giving the assembly a main body region and bending regions at the ends of the main body region. When the battery cell is charged, the positive electrode generates active ions. These active ions can penetrate the pores of the separator and move to the negative electrode, embedding themselves in the negative electrode's active material. Conversely, when the battery cell discharges, the active ions embedded in the negative electrode's active material are released. These released active ions can penetrate the pores of the separator and move to the positive electrode, embedding themselves in the positive electrode's active material.

[0061] The structure of the electrode assembly can be, but is not limited to, a wound structure or a stacked structure. A wound structure typically involves welding the tabs to the current collector, then arranging them in the order of positive electrode, separator, negative electrode, separator; and then winding them to form a cylindrical or square electrode assembly. A stacked structure typically involves leading tabs out from the current collector, arranging the positive electrode, negative electrode, and separator in the order of positive electrode, separator, negative electrode, separator, and stacking them layer by layer to form a stacked electrode assembly.

[0062] The battery cell also includes a casing, which has a top cover. The top cover is a component that closes onto the opening of the casing 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 casing to fit the casing. The top cover can be made of a material with a certain degree of hardness and strength (such as aluminum alloy), so that the top cover is not easily deformed under pressure and impact, giving the battery cell higher structural strength and improving reliability. Functional components such as terminals can be set on the top cover. The terminals are used for electrical connection with the electrode assembly to output or input electrical energy to the battery cell.

[0063] Typically, insulating materials are wrapped around the surface of electrode assemblies for insulation purposes. During battery assembly, space is reserved inside the battery cell casing for the electrode assemblies, including the space occupied by the insulating materials, thereby reducing the probability of short circuits in the battery cell. Therefore, insulating materials are indispensable in battery cells. Through the cooperation of insulating materials with end caps, electrode terminals, tabs, etc., a high-performance battery cell can be obtained.

[0064] Therefore, the proper installation of the insulating components is crucial. Insulating components are typically installed by wrapping around the electrode assembly to achieve good insulation. After the insulating components are installed, visual inspection equipment is used to detect their edges, thus determining whether the installation is correct.

[0065] Machine vision inspection equipment is a device that uses machines to measure and judge workpieces instead of human eyes. The machine vision product (i.e., image acquisition device) converts the captured target into an image signal and transmits it to a dedicated image processing system. Based on pixel distribution and information such as brightness and color, it is converted into a digital signal. The image system performs various operations on these signals to extract the features of the target, and then controls the on-site equipment action or judges the structural attributes of the equipment based on the judgment results.

[0066] In related operations, vision devices identify the position of insulating components by capturing their edges. However, due to the smoothness of the edges, inaccurate capture can occur during the identification process.

[0067] Therefore, in view of the above problems, this application provides a battery cell 11 that can solve the above problems.

[0068] This application also provides a battery 100, which includes the aforementioned battery cell 11, thereby ensuring that the insulating component 10 can be well captured and identified, and ensuring that the insulating component 10 is installed in place.

[0069] This application also provides an electrical device. The battery 100 provided in this application can be applied to an 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. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0070] The battery 100 disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles 1000, ships, or aircraft. Electrical devices can use power systems equipped with the battery 100 disclosed in this application, which helps improve the reliability of the electrical devices.

[0071] For ease of explanation, the following embodiments will use a vehicle 1000 as an example of the electrical device provided in this application.

[0072] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the 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 supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0073] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0074] The battery cell can be either a rechargeable battery or a primary battery. A rechargeable battery is one that can be recharged to reactivate its active materials and continue to be used after being discharged. A primary battery is one that cannot be recharged to reactivate its active materials and continue to be used after its electrical energy is depleted. The battery cell can also be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., but is not limited to these. The battery cell can be cylindrical, prismatic, pouch, or other shapes. Prismatic cells include prismatic cells, blade-shaped cells, and multi-prismatic cells, such as hexagonal prismatic cells. This application does not impose any particular limitations.

[0075] For a specific embodiment of the battery cell 11 provided in this application, please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The battery cell 11 includes a housing 12, an electrode assembly disposed within the housing 12, and an insulating member 10 enclosing the electrode assembly. The insulating member 10 has a marking edge 14 for detection by a vision device. The marking edge 14 is constructed as a non-straight edge.

[0076] Specifically, the insulating component 10 inside the battery cell 11 provided in this embodiment can be processed by die-cutting 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 component 10.

[0077] Please see Figure 4 and Figure 5 In use, the insulating member 10 is folded to form a shape that conforms to the outer contour of the electrode assembly, thereby enclosing the electrode assembly. The insulating member 10 has a marking edge 14, which is used for detection and capture by the vision device.

[0078] In related technologies, the edges of insulating components are usually relatively smooth, making them difficult to capture accurately. This often leads to incorrect judgments about the installation position of the insulating components, which in turn affects the insulation and reliability of the battery cell 11, and consequently the reliability of the entire battery 100 and the electrical device.

[0079] Therefore, this embodiment provides that the marking edge 14 is a non-straight edge, or it can also be called a rough edge, that is, the marking edge 14 is a relatively rough edge. When the visual detection equipment performs the inspection, it can improve the accuracy of capturing this marking edge 14, thereby ensuring the correct installation position of the insulating component 10.

[0080] The so-called non-straight edge means that the marked edge 14 is not a straight edge. It can be a wavy edge or a convex and concave edge. When it is a non-straight edge, it is equivalent to increasing the curvature of the edge while keeping the distance between the two ends of the edge unchanged, forming a rough edge structure, which can increase the recognizability.

[0081] The effect of this embodiment is that, since the marking edge 14 is made into a non-straight edge, the recognizability is increased and the accuracy of being captured by the visual detection device is improved. This enables an accurate judgment on whether the insulation component 10 is installed in place, identifies battery cells 11 with incorrect installation positions of the insulation component 10, ensures the reliability of battery cells 11 during use, and at the same time ensures the reliability of the electrical device.

[0082] In some embodiments, please refer to Figure 2 and Figure 4 The marking edge 14 is the side of the insulating part 10 near the top cover 13 of the housing 12.

[0083] Specifically, when the insulating member 10 is wrapped, it does not cover the upper surface of the electrode assembly, that is, it does not cover the side of the electrode assembly near the top cover 13 of the housing 12, but covers all other surfaces. Therefore, the insulating member 10 forms a side edge near the top cover 13 of the housing 12. When performing boundary capture using a vision device, this side edge is used as the capture object. When the position of this side edge is set correctly, it indicates that the insulating member 10 is installed in place. Therefore, in this embodiment, this side edge is referred to as the marking edge 14.

[0084] Its effect is that by detecting this top side, i.e., the marking edge 14, it is possible to accurately determine whether the insulating component 10 is installed in place.

[0085] In some embodiments, please refer to Figure 2 and Figure 4 An insulating member 10 is disposed between the housing 12 and the electrode assembly. The shape of the insulating member 10 is adapted to the shape of the electrode assembly. The insulating member 10 has wrapping sheets for wrapping each side of the electrode assembly.

[0086] Specifically, an electrode assembly is disposed within the housing 12, and an insulating member 10 encloses the electrode assembly. Therefore, the insulating member 10 is positioned between the housing 12 and the electrode assembly, providing excellent insulation. Furthermore, a wrapping piece is provided for each facet of the electrode assembly, with multiple wrapping pieces corresponding to each facet of the electrode assembly, thus enclosing the electrode assembly. The shape of each facet is adapted to the shape of the face of the electrode assembly it encloses. This ensures that the shape of the entire insulating member 10 is adapted to the shape of the electrode assembly.

[0087] The advantage of this embodiment is that it provides the assembly and structural relationship of the insulating component 10 within the housing 12, so that the insulating component 10 can be stably disposed inside the housing 12 and effectively enclose the electrode assembly, ensuring the insulation effect.

[0088] In some embodiments, please refer to Figure 5 and Figure 6 The 14th edge of the marker is a toothed edge.

[0089] Specifically, the toothed edge, or the marking edge 14, is a toothed edge, consisting of a series of evenly or unevenly arranged teeth along its length. The shapes of the teeth can be the same or different, and the teeth at both ends connect to the two endpoints of the marking edge 14.

[0090] When the edge is toothed, although the straight-line distance between the two endpoints of the side remains unchanged, the total side length is increased, forming a rough edge structure, which improves the capture accuracy of the visual inspection equipment.

[0091] The advantage of this embodiment is that the toothed edge is easy to process. The toothed edge can be formed by die-cutting the raw material with equipment, which improves the processing efficiency of the insulating part 10.

[0092] In some embodiments, please refer to Figures 6-8 The tooth shape of the marking edge 14 is one or more of the following: triangle, rectangle, trapezoid, semicircle, and arc.

[0093] Specifically, the tooth shape can be one or more of the following: triangle, rectangle, trapezoid, semicircle, arc.

[0094] When the shape is a triangle, it can be an isosceles triangle, an equilateral triangle, etc. When the shape is a rectangle, it can be a rectangle, a square, etc. When the shape 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.

[0095] Furthermore, the tooth shape can be one of the shapes mentioned above, such as a triangle, trapezoid, or arc. Or it can be a combination of other tooth shapes.

[0096] It should be noted that multiple tooth profiles are arranged in the same direction, that is, the two ends of each tooth profile are connected to the ends of the adjacent tooth profiles, and the multiple ends are arranged in the same direction, eventually connecting the two ends of the entire side.

[0097] This embodiment uses triangular, rectangular, trapezoidal, semi-circular, and arc-shaped tooth shapes. The tooth shape has a simple structure, is easy to process, and can increase the total length of the sides, forming a zigzag marking edge 14, which can improve the accuracy when the vision device performs the inspection.

[0098] In some embodiments, such as Figure 6 , Figure 7 and Figure 8 As shown, the horizontal distance H1 between the crest and trough of a single tooth on the marking edge 14 is 0-5mm, and the vertical distance H2 is 0-1mm.

[0099] Specifically, a single tooth profile can be triangular, trapezoidal, rectangular, semi-circular, or arc-shaped. Therefore, there is a highest and lowest point for each tooth profile; for example, for triangular, semi-circular, and arc-shaped profiles, refer to... Figure 6 The crest is the highest point of the tooth shape, while the troughs are located at the two ends of the tooth shape, i.e., the lowest points; (Reference) Figure 7 and Figure 8 For example, for a rectangle or trapezoid, since its highest point is a line segment, the peak can be the middle position of this line segment, and the trough is the lowest position at both ends.

[0100] Therefore, for any tooth profile, this embodiment provides a horizontal distance H1 between the crest and trough of 0-5 mm. At the same time, the vertical distance H2 between the crest and trough is 0-1 mm.

[0101] This embodiment provides the distance between the crest and trough, including the horizontal and vertical distances, which is equivalent to providing the size of the tooth shape. This makes the tooth shape smaller, so that more densely arranged teeth shape will be formed along the length of the marking edge 14. Because the teeth shape is smaller, the multiple teeth shape will form a thicker linear structure in the macroscopic vision, which greatly improves the accuracy of the vision device detection and makes it easier to capture the marking edge 14.

[0102] In some embodiments, the insulating element 10 is made of soft plastic. Soft plastic is a type of plastic material, which can be polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), etc. Soft plastic is flexible, lightweight, durable, and has good insulation properties, providing excellent insulation and protection.

[0103] 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, flexible, and resistant to low temperatures. Polyvinyl chloride (PVC) has good corrosion resistance and abrasion resistance.

[0104] Compared to hard plastics, soft plastics are generally more flexible and will not cause hard damage to the electrode components, preventing hard impacts, and have good insulation properties to prevent accidents such as short circuits.

[0105] In some embodiments, the thickness of the insulating element is 0.1mm-0.15mm.

[0106] The insulation component 10 has a thickness of 0.1mm-0.15mm, which is relatively small. This will not take up too much space inside the housing 12. Its thickness is only a thin layer, which has a light weight and volume, making it very convenient to install, and it can achieve the technical effect of insulation.

[0107] Please see Figure 4 and Figure 5 The insulating element 10 can be an integral structure formed by folding sheet-like insulating sheets 15.

[0108] Specifically, the insulating element 10 is a folded structure whose shape is adapted to the outer contour of the electrode assembly. It can be formed by folding the insulating sheet 15, which has a certain shape. After being folded in a preset manner, it can form the shape of the insulating element 10, thereby wrapping the electrode assembly.

[0109] The insulating sheet 15 is planar in form, its shape can be set as needed, and it can be folded into the insulating element 10 of a specified shape.

[0110] The insulating sheet 15 and the insulating component 10 are made of the same material; they belong to different states of the same structure.

[0111] The insulating element 10 is formed by folding the insulating sheet 15, which facilitates the processing of the insulating element 10. Since the insulating sheet 15 is flat, it is easy to manufacture. After the insulating sheet 15 is manufactured, it is folded to form the insulating element 10, which is simpler than directly manufacturing the folded insulating element 10.

[0112] In some embodiments, please refer to Figure 4 and Figure 5 The insulating component 10 includes a base sheet 151, a large sheet 152, and a side sheet 153.

[0113] The substrate 151 is used to cover the bottom of the electrode assembly; there are two large sheets 152 connected to the two sides of the substrate 151 in the first direction, and the large sheets 152 are used to cover the large surface of the electrode assembly; the side sheets 153 are connected to the two sides of the large sheets 152 in the second direction, and the side sheets 153 are used to cover the side of the electrode assembly. The first direction is perpendicular to the second direction, and at least one of the large sheets and the side sheets away from the substrate has an identification edge.

[0114] The insulating element 10 includes a base sheet 151, a large sheet 152, and side sheets 153. Before folding, the insulating element 10 is an insulating sheet 15. After folding, the base sheet 151 wraps around the bottom of the electrode assembly. There are two large sheets 152, which are respectively connected to both sides of the base sheet 151 in a first direction. After folding, 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 sheets 152 in a second direction. After folding, the side sheets 153 wrap around the side surface of the electrode assembly. The first direction is perpendicular to the second direction.

[0115] like Figure 5 As shown, the first direction is Figure 3 The middle X direction, the second direction is Figure 3 Center Y direction.

[0116] Specifically, generally, the various surfaces of the battery cell 11, i.e., the housing 12, are referred to as the bottom surface, the large surface, the side surface, and the top surface, respectively. A cover plate is provided on the top surface, and the end opposite the top surface is the bottom surface. The surfaces between the bottom surface and the top surface are the large surface and the side surface, with the large surface being the larger surface between the two and the side surface being the smaller surface between the two. Since the electrode assembly is adapted to the shape of the housing 12 and is correspondingly disposed within the housing 12, the various surfaces of the electrode assembly can also be referred to as the bottom surface, the large surface, the side surface, and the top surface. Because the insulating member 10 is disposed inside the housing 12 of the battery cell 11 and encloses the electrode assembly, the shape of the insulating member 10 is similar to or adapted to the shape 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 inside 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.

[0117] Since the bottom surface of the battery cell 11 and the electrode assembly is the same, a corresponding bottom sheet 151 of the insulating component 10 is also provided. Since the battery cell 11 and the electrode assembly have two large surfaces, a large sheet 152 is provided on each side of the bottom sheet 151 in the first direction. After folding, the large sheet 152 forms a 90-degree angle with the bottom sheet 151, so the two large sheets 152 can be respectively positioned to correspond to the two large surfaces. Side sheets 153 are connected to the two sides of the large sheets 152 in the second direction. After the large sheets 152 are folded up, the side sheets 153 are then folded, so that the side sheets 153 can be positioned to correspond to the side surfaces of the electrode assembly.

[0118] In some cases, side panels 153 can be provided on both sides of a large panel 152, or as... Figure 3 Side plates 153 are provided on both sides of the two large plates 152. When the two are provided at the same time, the two side plates 153 on the same side can be folded and can cross or connect to form a form that wraps the side of the electrode assembly.

[0119] At least one of the sides of the large film 152 and the side film 153 away from the negative film 151 is provided with a marking edge 14.

[0120] Specifically, the side of a large piece 152 away from the film 151 can be designated as the identification edge 14; or, the sides of two large pieces 152 away from the film 151 can both be designated as the identification edge 14; or, the side of a piece 153 away from the film 151 can be designated as the identification edge 14; or, the sides of two pieces 153 away from the film 151 can both be designated as the identification edge 14; or, the sides of a large piece 152 and a piece 153 away from the film 151 can both be designated as the identification edge 14; or, the sides of all large pieces 152 and all pieces 153 away from the film 151 can both be designated as the identification edge 14.

[0121] The advantage of this embodiment is that it provides a specific shape and composition of the insulating element 10, which enables it to effectively wrap the electrode assembly and is simple and convenient to operate.

[0122] In some embodiments, please refer to Figure 4 and Figure 5 Specifically, preferably, the sides of the large sheet 152 and the side sheet 153 that are away from the bottom sheet are both marking edges 14. After folding in the above manner, the sides of the large sheet 152 and the side sheet 153 that are away from the bottom sheet 151 form the top edge of the entire insulating component 10. The top edge is set around the top cover 13. When the insulating component 10 is installed in place, the top edge forms the marking edge 14. The installation status of the insulating component 10 can be detected by detecting the marking edge 14.

[0123] The advantage of this embodiment is that it forms a marking edge 14, which enables the detection of whether the insulating component 10 is installed in place by detecting the marking edge 14.

[0124] In some embodiments, the insulating element 10 is a single piece. That is, the various surfaces are connected to form a single integrated structure. Specifically, it can be a structure formed by folding a whole piece of insulating sheet 10. The advantage of a single-piece structure is better integrity, preventing splitting or fragmentation during use, and avoiding the problem of gaps caused by loose joints.

[0125] In some embodiments, the insulating element 10 is a die-cut part. Die-cutting the insulating element results in high processing efficiency, high speed, and guaranteed processing quality.

[0126] This application also provides an embodiment of an insulating member 10. In this embodiment, the insulating member 10 is used to be disposed inside the housing 12 of the battery cell 11 to enclose the electrode assembly. The side of the insulating member 10 near the top cover 13 of the housing 12 is a marking edge 14. The marking edge 14 is used for detection by a visual device. The marking edge 14 is constructed as a non-straight edge.

[0127] Similarly, this embodiment provides an insulating member 10 for use inside the battery cell 11, which can wrap the electrode assembly and has a marking edge 14. The side of the insulating member 10 near the top cover 13 of the housing 12 is the marking edge 14, and the marking edge 14 is constructed as a non-straight edge.

[0128] Its effect is that, due to the non-straight marking edge 14, when this insulating component 10 is installed inside any compatible battery cell 11, it can detect whether its installation in the battery cell 11 is in place by passing through the marking edge 14, thus ensuring the quality of the battery cell 11.

[0129] In some embodiments, the marking edge 14 is a toothed edge. Toothed edges are easy to process; they can be formed by die-cutting the raw material using equipment, which improves the processing efficiency of the insulating component 10.

[0130] In some embodiments, the tooth shape of the marking edge 14 is one or more of triangles, rectangles, trapezoids, semicircles, and arcs. Using triangular, rectangular, trapezoidal, semicircular, or arc-shaped teeth has a simple structure, is easy to process, and can increase the total length of the side, forming a meandering marking edge 14, which can improve accuracy when inspected by vision equipment.

[0131] As an embodiment provided in this application, an insulating member 10 is disposed within the housing 12 of a battery cell 11 to enclose the electrode assembly. The side of the insulating member 10 near the top cover 13 of the housing 12 is designated as a marking edge 14 for detection by a visual device. The marking edge 14 is constructed as a toothed edge. The tooth shape can be one or more of triangles, rectangles, trapezoids, semicircles, and arcs. The horizontal distance H1 between the crests and troughs of a single tooth on the marking edge 14 is 0-5 mm, and the vertical distance H2 is 0-1 mm. The insulating member 10 is made of soft plastic. The thickness of the insulating member 10 is 0.1 mm to 0.15 mm. The insulating component 10 includes a base sheet 151, a large sheet 152, and side sheets 153. The base sheet 151 is used to wrap the bottom of the electrode assembly. There are two large sheets 152, which are respectively connected to both sides of the base sheet 151 in a 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 sheets 152 in a second direction and are used to wrap the sides of the electrode assembly. The first direction is perpendicular to the second direction. The sides of the large sheets 152 and the side sheets 153 away from the base sheet 151 are both marking edges 14. The insulating component 10 is a one-piece die-cut part.

[0132] This application also provides a method for manufacturing an insulating component, used to manufacture the insulating component 10 provided in the above embodiments.

[0133] The insulating component manufacturing method provided in this embodiment can quickly obtain the insulating component 10. The processing method is simple and fast, which greatly improves the preparation efficiency of the insulating component 10.

[0134] Includes the following steps:

[0135] Material preparation;

[0136] Making die-cutting molds;

[0137] Preparation of raw material membrane;

[0138] The raw material film is slit and cut into preset sizes;

[0139] The raw material film after slitting was cut using a die-cutting tool to obtain insulating sheet 15;

[0140] Fold the insulating sheet 15 to form the insulating component 10.

[0141] Specifically, material preparation refers to preparing the raw materials to form the insulating component 10. This generally includes multiple raw materials, which are typically arranged in rolls. When needed, the material can be retrieved by rotating the roll, similar to the arrangement of everyday roll adhesive tape. The raw materials can be polypropylene (PP), polyethylene (PE), or polyvinyl chloride (PVC). It is composed of two or more materials laminated together.

[0142] Two or more materials need to be bonded together to form a whole. This bonding process can be performed using a laminating machine, which enables the materials to be bonded together. After bonding, a raw material film is formed for preparing the insulating component 10.

[0143] The die is a structure used to cut the raw material film. The blades of the die are arranged to match the shape of the insulating sheet 15 to be cut. Specifically, the die has a columnar structure with blades on the surface of the column. During cutting, the raw material film moves in a straight line while the die rotates continuously. When the film passes the die, the blades of the rolling die adhere to the raw material film and cut it. After the die has rotated once, all the blades have pressed onto the raw material film, thus cutting the film and forming the insulating sheet 15.

[0144] However, before cutting the raw material film, the size of the raw material film needs to be adjusted and cut into a suitable width. That is, the raw material film is cut into strips to form a preset size, and the width can be slightly larger than the width of the insulating sheet 15. After the insulating sheets 15 are cut out one after another, they are folded to form the insulating component 10.

[0145] The advantage of this embodiment is that it provides a method for manufacturing the insulating component 10, which can quickly and efficiently manufacture the insulating component 10, and the manufactured insulating component 10 is of good quality and can be well applied to the battery cell 11, achieving a good insulation protection effect.

[0146] In some embodiments, the die is provided with a cutting edge for cutting to form the marking edge 14, the shape of which is adapted to the shape of the marking edge 14.

[0147] Specifically, the die-cutting mold rotates to bring the cutting edge into contact with the raw material film, thereby cutting the film. Different cutting edges create different edges of the insulating sheet 15, and the cutting edge used to form the marking edge 14 is adapted to the shape of the marking edge 14. Adaptation means that the tooth shape of the cutting edge is the same as the tooth shape of the marking edge 14. When the tooth shape of the cutting edge is triangular, the tooth shape of the resulting marking edge 14 is also triangular. Therefore, by setting the tooth shape of the cutting edge on the die-cutting mold, the tooth shape of the marking edge 14 can be determined.

[0148] The advantage of this embodiment is that the shape of the marking edge 14 can be determined by setting the cutting edge of the die, so that the tooth shape of the marking edge 14 can be selected by the corresponding cutting edge, thereby improving the processing efficiency.

[0149] In some embodiments, after the raw material membrane is cut by a die, the process also includes collecting and processing the resulting scrap material.

[0150] Specifically, after the raw material film is cut, scraps and waste are generated. Therefore, these scraps and waste need to be processed to keep the processing equipment clean and facilitate continuous production.

[0151] The scrap material refers to the part remaining after the insulating sheet 15 is cut from the raw material film. The unused part is removed and cleaned up as waste.

[0152] In some embodiments, after the step of cutting the slit-cut raw material film using a die to obtain the insulating sheet 15, and before folding the insulating sheet 15, the following steps are further included:

[0153] Perform dimensional measurement, visual inspection, and encapsulation and labeling operations on insulating sheet 15.

[0154] This is equivalent to performing a quality inspection on the insulating sheet 15, removing any substandard insulating sheets 15 to ensure their quality, and simultaneously labeling the insulating sheet 15. When ready for use, the insulating sheet 15 is folded into an insulating component 10 and installed inside the housing 12.

[0155] As an embodiment of this application, a method for manufacturing an insulating element 10 includes: preparing materials; manufacturing a die, the die having a blade for cutting to form a marking edge 14, the shape of the blade being adapted to the shape of the marking edge 14; preparing a raw material film; slitting the raw material film into a preset size; using the die to cut the slitting raw material film to obtain an insulating sheet 15; performing dimensional measurement, visual inspection, and encapsulation and labeling operations on the insulating sheet 15; and folding the insulating sheet 15 in use to form the insulating element 10.

[0156] This application also provides an embodiment of a battery 100, which includes a battery cell 11 provided in any of the above embodiments or is provided with an insulating member 10 as described in any of the embodiments.

[0157] The effect is that when the battery 100 is equipped with the battery cell 11 provided in this embodiment or the insulating member 10 provided in this application embodiment, since the insulating member 10 has a marking edge 14, the position of the insulating member 10 can be accurately identified by the visual inspection device, ensuring that the insulating member 10 is installed in place. This ensures the quality of the battery 100 and improves the stability and reliability of the battery 100 in use.

[0158] This application also provides an electrical device that includes the battery 100 described in the above embodiments. 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 enhanced.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that, The battery cell includes a housing, an electrode assembly disposed within the housing, and an insulating component enclosing the electrode assembly. The insulating component has a marking edge for detection by a visual device, and the marking edge is constructed as a non-straight edge. The marking edge is a toothed edge; The insulating component has a marking edge on the side near the top cover of the housing, and the top cover is equipped with a pressure relief mechanism; The insulating component includes a base sheet, a large sheet, and side sheets. The base sheet is used to wrap the bottom of the electrode assembly. There are two large sheets, which are respectively connected to both sides of the base sheet in a first direction. The large sheets are used to wrap the large surface of the electrode assembly. The side sheets are connected to both sides of the large sheets in a second direction. The side sheets are used to wrap the side surface of the electrode assembly. The first direction is perpendicular to the second direction. The sides of the large sheet and the side sheet that are away from the base sheet are both the marking edges.

2. The battery cell as described in claim 1, characterized in that, The insulating element is disposed between the housing and the electrode assembly. The shape of the insulating element is adapted to the shape of the electrode assembly. The insulating element has wrapping sheets for wrapping each side of the electrode assembly.

3. The battery cell as described in claim 1, characterized in that, The tooth shape of the marking edge is one or more of the following: triangle, rectangle, trapezoid, semicircle, and arc.

4. The battery cell as described in claim 1, characterized in that, The horizontal distance H1 between the crest and trough of a single tooth on the edge of the marker is 0-5mm, and the vertical distance H2 is 0-1mm.

5. The battery cell according to any one of claims 1 to 4, characterized in that, The insulating component is made of soft plastic.

6. The battery cell according to any one of claims 1 to 4, characterized in that, The thickness of the insulating component is 0.1mm-0.15mm.

7. The battery cell according to any one of claims 1 to 4, characterized in that, The sides of the large sheet and the side sheet that are away from the base sheet are both the marking edges.

8. The battery cell according to any one of claims 1 to 4, characterized in that, The insulating component is a single piece.

9. The battery cell according to any one of claims 1 to 4, characterized in that, The insulating component is a die-cut part.

10. An insulating component, characterized in that, The insulating component is used to be installed inside the housing of the battery cell to enclose the electrode assembly. The side of the insulating component near the top cover of the housing is a marking edge. The top cover is provided with a pressure relief mechanism. The marking edge is used for detection by a visual device. The marking edge is constructed as a non-straight edge. The marking edge is a toothed edge; The insulating component includes a base sheet, a large sheet, and side sheets. The base sheet is used to wrap the bottom of the electrode assembly. There are two large sheets, which are respectively connected to both sides of the base sheet in a first direction. The large sheets are used to wrap the large surface of the electrode assembly. The side sheets are connected to both sides of the large sheets in a second direction. The side sheets are used to wrap the side surface of the electrode assembly. The first direction is perpendicular to the second direction. The sides of the large sheet and the side sheet that are away from the base sheet are both the marking edges.

11. The insulating element as claimed in claim 10, characterized in that, The tooth shape of the marking edge is one or more of the following: triangle, rectangle, trapezoid, semicircle, and arc.

12. A method for manufacturing an insulating component, characterized in that, for manufacturing the insulating component according to claim 10 or 11, the method comprises the following steps: Material preparation; Making die-cutting molds; Preparation of raw material membrane; The raw material film is slit and cut into preset sizes; The raw material film, after being slit, is cut using the aforementioned die to obtain an insulating sheet; The insulating sheet is folded to form the insulating element.

13. The method for manufacturing an insulating component as described in claim 12, characterized in that, The die-cutting mold is provided with a cutting edge for cutting to form the marking edge, and the shape of the cutting edge is adapted to the shape of the marking edge.

14. The method for manufacturing an insulating component as described in claim 12, characterized in that, After the step of cutting the slit-cut raw material film using the die to obtain the insulating sheet, and before folding the insulating sheet, the following steps are also included: Perform dimensional measurement, visual inspection, and encapsulation and labeling operations on the insulating sheets.

15. A battery, characterized in that, The battery comprises a battery cell as described in any one of claims 1-9 or is provided with an insulating element as described in claim 10 or 11.

16. An electrical appliance, characterized in that, The electrical device includes the battery as described in claim 15.

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