Electrode assembly appearance detection equipment and battery production line

Abstract

The utility model relates to the technical field of battery production, in particular to electrode assembly appearance detection equipment and a battery production line. The electrode assembly appearance detection equipment comprises a workbench capable of moving along a first direction, a distance detection part and a controller, wherein the workbench is used for placing an electrode assembly; the distance detection component is arranged on one side of the workbench and is used for detecting the actual distance between a specified position of the workbench and the distance detection component, and the specified position is the position where the part, close to the main body part, of the tab part passes; the controller is electrically connected with the distance detection part, and the controller is configured to determine that the appearance detection result of the electrode assembly is qualified according to the fact that the number of times that the actual distance is abnormal conforms to the preset number of times. According to the embodiment of the invention, the appearance detection result of the electrode assembly can be determined according to the number of times that the actual distance is abnormal, so that whether the diaphragm is damaged when being pulled out from the inside of the electrode assembly when the electrode assembly is pulled out from the winding needle is detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, and particularly relates to an electrode assembly appearance detection device and a battery production line. BACKGROUND

[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] With the increasing maturity of new energy technology, new energy vehicles and other electric devices have gradually entered the public view. The main core technology of new energy vehicles lies in the battery device, and the safety and stability of the battery device directly determine the performance of the whole vehicle.

[0004] The battery device includes a battery monomer, and the battery monomer includes an electrode assembly. When the electrode assembly after winding is pulled out from the winding needle, the diaphragm is easily pulled out from the inside of the electrode assembly, thereby causing damage to the electrode assembly. Therefore, an electrode assembly appearance detection device is needed to detect this damage. Contents of the utility model

[0005] In view of the above problems, the present application provides an electrode assembly appearance detection device and a battery production line, which solves the problem that the appearance detection device in the prior art cannot detect the damage of the diaphragm pulled out from the inside of the electrode assembly when the electrode assembly after winding is pulled out from the winding needle.

[0006] A first aspect of an embodiment of the present application provides an electrode assembly appearance detection device, the electrode assembly including a main body part and a tab part connected to each other, the tab part protruding from the main body part, comprising:

[0007] A workbench movable in a first direction, the workbench being used to place the electrode assembly, wherein the first direction is a length direction or a width direction of the electrode assembly appearance detection device;

[0008] A distance detection part, the distance detection part being arranged on one side of the workbench and being used to detect an actual distance between a specified position of the workbench and the distance detection part, wherein the specified position is a position passed by a part of the tab part close to the main body part; and

[0009] A controller, the controller being electrically connected with the distance detection part, and the controller being configured to determine that an appearance detection result of the electrode assembly is qualified according to that a number of times of abnormality of the actual distance meets a predetermined number of times.

[0010] The electrode assembly appearance detection device of the embodiment of the present application can detect the distance of the specified position of the workbench, and determine that the appearance detection result of the electrode assembly is qualified according to the number of times that the actual distance is abnormal and the number of times that the actual distance is abnormal meets the predetermined number of times, so as to realize the detection of whether the diaphragm is damaged when the electrode assembly is pulled out from the winding needle.

[0011] In some embodiments of the present application, the workbench is horizontally arranged, the distance detection component is arranged above the workbench along the second direction, and the distance between the distance detection component and the workbench is adjustable, wherein the second direction is the height direction of the electrode assembly appearance detection device.

[0012] The embodiment of the present application can adjust the distance between the distance detection component and the workbench, so as to detect the electrode assembly of different heights, and adjust the distance between the distance detection component and the workbench according to the height of the electrode assembly.

[0013] In some embodiments of the present application, the electrode assembly appearance detection device further comprises a mounting assembly, the mounting assembly comprises a first support and a second support arranged at an angle, and the workbench is connected with the first support; the distance detection component is movably arranged on the second support.

[0014] The embodiment of the present application can adjust the position of the distance detection component by movably arranging the distance detection component on the second support.

[0015] In some embodiments of the present application, the second support is provided with a first sliding groove extending along a third direction, and the distance detection component can slide along the first sliding groove, wherein the third direction intersects with the first direction and intersects with the second direction.

[0016] The embodiment of the present application can adjust the position of the distance detection component along the third direction by setting the first sliding groove on the second support, wherein the first sliding groove extends along the third direction, and the distance detection component can slide along the first sliding groove, and the third direction intersects the first direction and the second direction, so that the position of the distance detection component along the third direction can be adjusted, and the detection position of the electrode assembly can be conveniently adjusted.

[0017] In some embodiments of the present application, the mounting assembly further comprises a third support and a fourth support, the third support and the second support are arranged in parallel; the fourth support is connected with the third support and the second support respectively, and the second support can move along the fourth support.

[0018] The embodiment of the present application can adjust the position of the distance detection component along the third direction by setting the first sliding groove on the second support, wherein the first sliding groove extends along the third direction, and the distance detection component can slide along the first sliding groove, and the third direction intersects the first direction and the second direction, so that the position of the distance detection component along the third direction can be adjusted, and the detection position of the electrode assembly can be conveniently adjusted.

[0019] In some embodiments of the present application, the fourth support is provided with a second sliding groove, the second sliding groove extends along the second direction, and the second support can move along the second sliding groove.

[0020] The embodiment of the present application can adjust the position of the distance detection component along the third direction by setting the first sliding groove on the second support, wherein the first sliding groove extends along the third direction, and the distance detection component can slide along the first sliding groove, and the third direction intersects the first direction and the second direction, so that the position of the distance detection component along the third direction can be adjusted, and the detection position of the electrode assembly can be conveniently adjusted.

[0021] In some embodiments of the present application, the electrode assembly appearance detection device further comprises a mounting seat, the mounting seat is connected with the first support, and the mounting seat is arranged in parallel with the workbench.

[0022] The embodiment of the present application can adjust the position of the distance detection component along the third direction by setting the first sliding groove on the second support, wherein the first sliding groove extends along the third direction, and the distance detection component can slide along the first sliding groove, and the third direction intersects the first direction and the second direction, so that the position of the distance detection component along the third direction can be adjusted, and the detection position of the electrode assembly can be conveniently adjusted.

[0023] In some embodiments of the present application, the controller comprises a storage module, the storage module is used to store the expected distance between the specified position of the workbench and the distance detection component.

[0024] The embodiment of the present application can make the controller compare the actual distance detected by the distance detecting component with the expected distance, determine whether the detected actual distance is abnormal, and determine the detection result of the appearance of the electrode assembly according to the number of abnormalities.

[0025] In some embodiments of the present application, the controller comprises a warning module configured to issue a warning message when the deviation of the actual distance from the expected distance is greater than a preset range.

[0026] The embodiment of the present application can determine the detection result of the appearance of the electrode assembly by the number of warning messages, so that the tester can determine the detection result of the appearance of the electrode assembly according to the number of warning messages, and make different disposal of the electrode assembly.

[0027] In some embodiments of the present application, the controller is configured to determine that the appearance detection result of the electrode assembly is qualified when the number of abnormalities of the actual distance is 2.

[0028] The embodiment of the present application can detect the electrode assembly with the tabs on the same end, and realize the detection of the appearance of the electrode assembly and the detection of the appearance of the electrode assembly.

[0029] The second aspect of the present application provides a battery production line comprising the electrode assembly appearance detection device mentioned in the above embodiments, and the electrode assembly appearance detection device is used to detect the appearance of the electrode assembly.

[0030] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art, upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0032] Figure 1A structural diagram of a power consuming device according to some embodiments of the present application;

[0033] Figure 2 A structural diagram of a battery device according to some embodiments of the present application;

[0034] Figure 3 A structural diagram of a battery cell according to some embodiments of the present application;

[0035] Figure 4 A structural diagram of an electrode assembly appearance inspection device according to some embodiments of the present application;

[0036] Figure 5 A structural diagram of an electrode assembly appearance inspection device according to some embodiments of the present application; Figure 4 A partial enlarged structural diagram of an electrode assembly appearance inspection device according to some embodiments of the present application at A;

[0037] Figure 6 A detection principle diagram of an electrode assembly appearance inspection device according to some embodiments of the present application;

[0038] Figure 7 A structural diagram of a controller according to some embodiments of the present application;

[0039] Figure 8 A structural diagram of an electrode assembly that is a qualified product according to some embodiments of the present application;

[0040] Figure 9 A structural diagram of an electrode assembly that is a non-qualified product according to some embodiments of the present application;

[0041] Figure 10 A structural diagram of an electrode assembly that is a non-qualified product according to some embodiments of the present application;

[0042] Figure 11 A structural diagram of an electrode assembly that is a non-qualified product according to some embodiments of the present application;

[0043] Figure 12 A structural diagram of an electrode assembly that is a non-qualified product according to some embodiments of the present application.

[0044] Reference signs are as follows:

[0045] 1000, vehicle; 100, battery device; 200, control unit; 300, motor;

[0046] 10, battery cell; 11, top cover; 111, electrode terminal; 12, electrode assembly; 121, main body portion; 122, tab portion; 123, abnormal portion; 13, case; 131, accommodating cavity; 14, insulating film;

[0047] 20, box; 21, first box; 22, second box; 23, containing space;

[0048] 30, appearance detection device; 31, workbench; 311, rotating shaft; 32, distance detection component; 33, controller; 331, storage module; 332, warning module; 34, mounting assembly; 341, first support; 342, second support; 3421, first sliding groove; 343, third support; 3431, first part; 3432, second part; 344, fourth support; 3441, second sliding groove; 345, mounting seat;

[0049] X-X, first direction;

[0050] Z-Z, second direction;

[0051] Y-Y, third direction;

[0052] L1, preset distance between the specified position of the workbench and the distance detection component;

[0053] L2, actual distance between the specified position of the workbench and the distance detection component. DETAILED DESCRIPTION

[0054] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0055] 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 belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0056] In the description of the embodiments of the present application, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0057] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments in accordance with the application.

[0058] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects have an“or” relationship.

[0059] In the description of the embodiments of the application, the term“a plurality of” means two or more (including two), and similarly, “a plurality of groups” means two or more groups (including two groups), and “a plurality of pieces” means two or more pieces (including two pieces).

[0060] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“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 drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0061] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection” and“fixing” and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0062] At present, from the development of market situation, the application of battery apparatus is more and more extensive. The battery apparatus is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of battery apparatus, the demand of its market is also increasing.

[0063] The battery apparatus related to the embodiments of the present application can be used in, but not limited to, electric equipment such as vehicles, ships or aircraft. The battery apparatus can be used to form the battery apparatus of the electric equipment.

[0064] The electric equipment using the battery apparatus as power supply in the embodiments of the present application can be, but not limited to, mobile phones, tablets, notebook computers, electric toys, electric tools, electric cars, electric cars, ships, spacecraft and the like. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, and the like. Spacecraft can include aircraft, rockets, space shuttles and spacecraft, and the like.

[0065] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above described battery apparatus and electric equipment, but also can be applied to all batteries including the box and the electric equipment using the battery.

[0066] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through the busbar component.

[0067] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0068] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by binding a plurality of battery cells with a cable tie.

[0069] In some embodiments, the battery apparatus can be a battery pack, which includes a box and one or more battery cell assemblies, and the battery cell assemblies are contained in the box.

[0070] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the case by fixing the battery module in the case.

[0071] As an example, the battery cell assembly can also be accommodated in the case by fixing a plurality of battery cells directly in the case.

[0072] As an example, the case can include a first case and a second case. The first case and the second case are fastened so that an enclosed space is formed inside the case to accommodate the battery cell assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0073] As an example, the case can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0074] In some embodiments, the case can be part of the chassis structure of the vehicle. For example, part of the case can be at least part of the floor of the vehicle, or part of the case can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0075] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly works by moving metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the current collector without the positive electrode active material layer is protruded from the current collector with the positive electrode active material layer, and the current collector without the positive electrode active material layer is laminated as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, the current collector without the negative electrode active material layer is protruded from the current collector with the negative electrode active material layer, and the current collector without the negative electrode active material layer is laminated as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure, and the embodiments of the present application are not limited thereto.

[0076] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc.

[0077] The battery device includes a battery cell including an electrode assembly, and when the electrode assembly after being wound is pulled out from a winding pin, the separator is easily pulled out from the inside of the electrode assembly, thus causing damage to the electrode assembly. Therefore, an electrode assembly appearance inspection device is needed to detect the damage.

[0078] To solve this problem, the electrode assembly appearance inspection device provided by the embodiments of the present application includes a workbench movable along a first direction, a distance detection component, and a controller, the workbench is used to place the electrode assembly, the first direction is the length direction or the width direction of the electrode assembly appearance inspection device, the distance detection component is arranged on one side of the workbench and is used to detect the actual distance between a specified position of the workbench and the distance detection component, the specified position is a position passed by the part of the tab portion closer to the body portion, and the controller is electrically connected with the distance detection component, and the controller is configured to determine that the appearance inspection result of the electrode assembly is qualified according to that the number of times of abnormality of the actual distance meets a predetermined number of times.

[0079] The electrode assembly appearance inspection device in the embodiments of the present application can be used in the production process of the battery device to realize the appearance inspection of the electrode assembly.

[0080] The structure in the embodiments of the present application will be described in detail below with reference to the drawings.

[0081] Combined with Figure 1 As shown in the figure, the vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a control unit 200 and a motor 300, and the control unit 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0082] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0083] As Figure 2 As shown in the figure, the embodiments of the present application further provide a battery device 100, which includes a battery box 20 and a battery cell 10, and the battery box 20 is internally provided with an accommodating space 23, and the battery cell 10 is installed in the accommodating space 23.

[0084] In some embodiments, as shown in Figure 2 The battery box 20 can include a first box 21 and a second box 22, which are mutually covered, and together define a containing space 23 for containing the battery monomer 10. The first box 21 and the second box 22 can each be a hollow structure with one end open, and the second box 22 covers the open side of the first box 21 to define the containing space together with the first box 21; or the second box 22 can be a plate structure, and the first box 21 can be a hollow structure with one side open, and the open side of the second box 22 covers the open side of the first box 21. Of course, the battery box 20 formed by the first box 21 and the second box 22 can have various shapes, such as a cylinder or a cuboid.

[0085] The battery monomer 10 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery monomer 10 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0086] As shown in Figure 3 The embodiments of the present application also propose a battery monomer 10, which includes an electrode assembly 12, the electrode assembly 12 including a main body part 121 and a tab part 122 protruding from the main body part 121, and the main body part 121 and the tab part 122 being electrically connected.

[0087] It can be understood that the battery monomer 10 also includes a shell 13, an insulating film 14, and a top cover 11, wherein the electrode assembly 12 is located in a space enclosed by the top cover 11 and the shell 13, the insulating film 14 covers the outer surface of the shell 13, and the electrode terminal 111 is mounted on the top cover 11.

[0088] The electrode assembly 12 is a component in which an electrochemical reaction occurs in the battery monomer 10. The shell 13 is provided with a containing cavity 131, and the containing cavity 131 can contain one or more electrode assemblies 12. The main body part 121 includes a first pole piece, a second pole piece, and a separator, the polarities of the first pole piece and the second pole piece being opposite, and the separator is used to insulate and separate the first pole piece and the second pole piece. The first pole piece, the second pole piece, and the separator can be wound or stacked. The first pole piece includes a first coated area coated with a first active material layer, and the second pole piece includes a second coated area coated with a second active material layer. The tab part 122 can be a positive tab or a negative tab, wherein the positive tab and the negative tab can be located at one end of the main body part 121 or at two ends of the main body part 121, respectively. In the charging and discharging process of the battery monomer 10, the first active material and the second active material react with the electrolyte, and the tab part 122 connects the electrode terminal 111 to form a current loop.

[0089] As Figure 4 and Figure 5 shown, the embodiments of the present application also propose an electrode assembly appearance detection device 30, the electrode assembly includes a main body part 121 and a tab part 122 connected to each other, the tab part 122 is arranged protruding from the main body part 121, the appearance detection device 30 includes a workbench 31 movable along a first direction, a distance detection part 32 and a controller 33, the workbench 31 is used to place the electrode assembly 12, wherein the first direction is the length direction or the width direction of the electrode assembly appearance detection device 30; the distance detection part 32 is arranged on one side of the workbench 31 and is used to detect the actual distance between the specified position of the workbench 31 and the distance detection part 32, wherein the specified position is the position passed by the part of the tab part 122 closer to the main body part 121; the controller 33 is electrically connected with the distance detection part 32, and the controller 33 is configured to determine that the appearance detection result of the electrode assembly 12 is qualified according to that the number of times of abnormality of the actual distance meets a predetermined number of times.

[0090] In Figure 3 , the first direction is the length direction of the electrode assembly appearance detection device 30, that is, the X-X direction in Figure 3 , the workbench 31 can move along the X-X direction, which can move from left to right or from right to left, so that the electrode assembly 12 placed on the workbench 31 can be moved, so that the distance detection part 32 can detect the actual distance between the specified position of the workbench 31 and the distance detection part 32.

[0091] Here, the distance detection part 32 can be a sensor type distance sensor, such as a laser ranging sensor, an ultrasonic ranging sensor or an infrared ranging sensor, etc., which can realize the distance between the distance detection part 32 and the specified position of the workbench 31. Alternatively, the distance detection part 32 here can also be a rangefinder type part, such as a rangefinder, etc. Alternatively, the distance detection part 32 here can also be a measuring instrument product, such as a scale, which can realize the distance detection between the specified position of the workbench 31 and the distance detection part 32.

[0092] In addition, the controller 33 mentioned here is electrically connected with the distance detection part 32, and the controller 33 is configured to determine that the appearance detection result of the electrode assembly 12 is qualified according to that the number of times of abnormality of the actual distance meets a predetermined number of times, which means that the controller 33 can receive the actual distance detected by the distance detection part 32, and can determine the number of times of abnormality of the actual distance to determine whether the appearance detection result of the electrode assembly 12 is qualified or not qualified, wherein when the number of times of abnormality of the actual distance meets the predetermined number of times, it is determined that the appearance of the electrode assembly 12 is qualified, and when the number of times of abnormality of the actual distance does not meet the predetermined number of times, it is determined that the appearance of the electrode assembly 12 is not qualified.

[0093] It should be noted that when the electrode assembly 12 is unqualified product, the abnormal part 123 is usually formed on the main body part 121 and protrudes outward, and the abnormal part 123 can be a diaphragm or the like. Therefore, when the tab part 122 and the abnormal part 123 pass through the specified position of the workbench 31, the actual distance between the tab part 122 and the abnormal part 123 is abnormal.

[0094] The electrode assembly appearance detection device 30 of the embodiment of the present application comprises a workbench 31, a distance detection component 32 and a controller 33. The workbench 31 is movable along a first direction. The distance detection component 32 is arranged on one side of the workbench 31 and is used to detect the actual distance between the specified position of the workbench 31 and the distance detection component 32. The specified position is the position passed by the part of the tab part 122 closer to the main body part 121. The controller 33 is electrically connected with the distance detection component 32. The controller 33 is configured to determine that the appearance detection result of the electrode assembly 12 is qualified when the number of times of abnormality of the actual distance meets a predetermined number of times. The distance detection component 32 can detect the distance of the specified position of the workbench 31. The appearance detection result of the electrode assembly 12 is determined to be qualified when the number of times of abnormality of the actual distance meets the predetermined number of times. Thus, the damage of the diaphragm pulled out from the inside of the electrode assembly 12 when the electrode assembly 12 is pulled out from the needle can be detected.

[0095] Optionally, as shown in Figure 4 and Figure 5 , the workbench 31 is horizontally arranged. The distance detection component 32 is arranged above the workbench 31 along a second direction. The distance between the distance detection component 32 and the workbench 31 is adjustable. The second direction is the height direction of the electrode assembly appearance detection device 30, that is, the Z-Z direction in Figure 4 .

[0096] It should be noted that the distance detection component 32 can also be arranged below the workbench 31 along the second direction. The distance between the distance detection component 32 and the workbench 31 is adjustable. The workbench 31 is horizontally arranged. The movement of the workbench 31 can be realized by the rotation shaft 311. The number of the rotation shaft 311 is multiple. The multiple rotation shafts 311 are arranged in parallel. The workbench 31 can adopt the structure of the conveyor belt. The movement of the electrode assembly 12 can be realized by the movement of the conveyor belt.

[0097] The embodiment of the present application can adjust the distance between the distance detection component 32 and the workbench 31, so as to detect the electrode assembly 12 of different heights, and adjust the distance between the distance detection component 32 and the workbench 31 according to the height of the electrode assembly 12.

[0098] Optionally, as shown in Figure 4 and Figure 5 The electrode assembly appearance detection device 30 further comprises a mounting assembly 34, the mounting assembly 34 comprises a first support 341 and a second support 342 arranged at an included angle, and the workbench 31 is connected with the first support 341; and the distance detection component 32 is movably arranged on the second support 342.

[0099] Here, the first support 341 and the second support 342 can be arranged perpendicular to each other, wherein the first support 341 is in a plate structure, which can be a solid plate structure or a hollow plate structure; and the second support 342 can be a long strip-shaped plate structure, and the distance detection component 32 can move along the length direction of the second support 342, that is, the distance detection component 32 can move in two directions along the Y-Y direction, so as to adjust the position of the distance detection component 32 along the Y-Y direction, so that the distance detection component 32 can measure the specified position of the workbench 31.

[0100] The embodiment of the present application can adjust the distance between the distance detection component 32 and the workbench 31, so as to detect the electrode assembly 12 of different heights, and adjust the distance between the distance detection component 32 and the workbench 31 according to the height of the electrode assembly 12.

[0101] Optionally, as shown in Figure 5 The second support 342 is provided with a first sliding groove 3421 extending along a third direction, and the distance detection component 32 can slide along the first sliding groove 3421, wherein the third direction intersects the first direction and the second direction, and the third direction is the Y-Y direction in Figure 4 Here, the number of the first sliding groove 3421 can be one, two parallel sliding grooves or three parallel sliding grooves, wherein the distance detection component 32 is below the first sliding groove 3421, and the mounting of the distance detection component 32 on the second support 342 can be achieved by a screw structure.

[0102] It should be noted that the second support 342 is horizontally arranged, and the end of the second support 342 facing the first support 341 is spaced from the first support 341, which does not affect the upward movement or downward movement of the second support 342 as a whole.

[0103] The embodiment of the present application is provided with the first sliding groove 3421 on the second support 342, wherein the first sliding groove 3421 extends along the third direction, and the distance detection component 32 can slide along the first sliding groove 3421, wherein the third direction intersects the first direction and intersects the second direction, so that the position of the distance detection component 32 along the third direction can be adjusted, and the detection position of the electrode assembly 12 can be conveniently adjusted.

[0104] Optionally, as shown in Figure 4 and Figure 5 , the mounting assembly 34 further includes a third support 343 and a fourth support 344, the third support 343 and the second support 342 are arranged in parallel, and the fourth support 344 is connected with the third support 343 and the second support 342 respectively, and the second support 342 can move along the fourth support 344.

[0105] It should be noted that the third support 343 is also a horizontally arranged rod-shaped structure or a plate-shaped structure, and the fourth support 344 is a vertically arranged plate-shaped structure, and the two ends of the fourth support 344 are detachably connected with the third support 343 and the second support 342 respectively, wherein the second support 342 can move along the fourth support 344, that is, the second support 342 can move along the extension direction of the fourth support 344, that is, the Z-Z direction, so that the position of the second support 342 along the Z-Z direction can be adjusted, and the position of the distance detection component 32 fixed on the second support 342 along the Z-Z direction is adjusted, the position adjustment of the distance detection component 32 in the height direction is realized, so that the appearance detection equipment 30 can be applicable to electrode assemblies 12 of different heights, and the appearance of electrode assemblies 12 of different heights can be detected.

[0106] The embodiment of the present application is provided with the third support 343 and the fourth support 344 in the mounting assembly 34, wherein the third support 343 and the second support 342 are arranged in parallel, the fourth support 344 is connected with the third support 343 and the second support 342 respectively, and the second support 342 can move along the fourth support 344, so that the distance detection component 32 on the second support 342 can be moved by the second support 342 moving along the fourth support 344, and the position of the distance detection component 32 is adjusted.

[0107] Optionally, as shown in Figure 5As shown, the third support 343 comprises a first part 3431 and a second part 3432 connected with each other, the second part 3432 is connected with the first support 341, the first part 3431 and the second part 3432 are detachably connected, and the first part 3431 is provided with an elongated sliding groove, and the relative position between the first part 3431 and the second part 3432 can be adjusted.

[0108] Optionally, as shown in Figure 5 As shown, the fourth support 344 is provided with a second sliding groove 3441 extending along a second direction, and the second support 342 can move along the second sliding groove 3441.

[0109] Here, the number of the second sliding groove 3441 can be one, two parallel sliding groove structures, or three parallel sliding groove structures, and the second sliding groove 3441 extends along the Z-Z direction, and the number of the second sliding groove 3441 is two.

[0110] The embodiment of the present application provides the second sliding groove 3441 on the fourth support 344, the second sliding groove 3441 extends along the second direction, and the second support 342 can move along the second sliding groove 3441, so that the position of the second support 342 along the second direction can be adjusted, the position of the distance detection component 32 along the second direction on the second support 342 can be adjusted, and the position of the distance detection component 32 in the height direction can be adjusted.

[0111] Optionally, as shown in Figure 4 As shown, the electrode assembly appearance detection device 30 further comprises a mounting seat 345, the mounting seat 345 is connected with the first support 341, and the mounting seat 345 is spaced apart from the workbench 31.

[0112] Here, the mounting seat 345 is located at the bottom of the entire electrode assembly appearance detection device 30, the mounting seat 345 can be a plate-shaped structure, the mounting seat 345 and the first support 341 can be a split structure, and the mounting seat 345 and the first support 341 are connected by welding or other processes. Alternatively, the mounting seat 345 can be an integral structure with the first support 341, and the mounting seat 345 is an L-shaped angular structure, and the mounting seat 345 is fixed to a fixed object such as the ground or the desktop.

[0113] The embodiment of the present application provides the mounting seat 345, the mounting seat 345 is connected with the first support 341, and the mounting seat 345 is spaced apart from the workbench 31, so that the first support 341 can be fixed, and the movement of the workbench 31 is not affected.

[0114] Optionally, as shown in Figure 6 and Figure 7As shown, the controller 33 comprises a storage module 331, which is configured to store the expected distance between the specified position of the workbench 31 and the distance detection component 32. In consideration of the horizontal structure of the workbench 31, the expected distance L1 between the specified position of the workbench 31 and the distance detection component 32 can be set as needed and stored in the storage module 331.

[0115] The embodiments of the present application can make the controller 33 compare the actual distance L2 detected by the distance detection component 32 with the expected distance L1, so as to determine whether the detected actual distance is abnormal, and determine the detection result of the appearance of the electrode assembly 12 according to the number of abnormality occurrences.

[0116] Optionally, as shown in Figure 6 The controller 33 comprises a warning module 332, which is configured to issue a warning information when the deviation of the actual distance L2 from the expected distance L1 is greater than a preset range.

[0117] The embodiments of the present application can make the controller 33 compare the actual distance L2 detected by the distance detection component 32 with the expected distance L1, so as to determine whether the detected actual distance is abnormal, and determine the detection result of the appearance of the electrode assembly 12 according to the number of abnormality occurrences.

[0118] It should be noted that the warning module 332 can be a sound alarm or a light display.

[0119] Optionally, the controller 33 is configured to determine that the appearance detection result of the electrode assembly 12 is qualified when the number of warning information is 2.

[0120] Optionally, the controller 33 is configured to determine that the appearance detection result of the electrode assembly 12 is qualified when the number of abnormality occurrences of the actual distance is 2.

[0121] The embodiments of the present application can make the controller 33 compare the actual distance L2 detected by the distance detection component 32 with the expected distance L1, so as to determine whether the detected actual distance is abnormal, and determine the detection result of the appearance of the electrode assembly 12 according to the number of abnormality occurrences.

[0122] It can be understood that in the present embodiment, the predetermined number of times is 2, which is a predetermined number of times set based on the structure of the common electrode assembly 12. When the tab portions 122 are located at both ends of the electrode assembly 12, respectively, the predetermined number of times here can be set to 1, and when the controller 33 is configured to determine that the appearance detection result of the electrode assembly 12 is qualified according to the number of times that the actual distance appears to be abnormal being consistent with the predetermined number of times 1.

[0123] The detection principle of the electrode assembly appearance detection device 30 will be described in detail below.

[0124] As shown in Figure 8 , when the electrode assembly 12 is a qualified product, the number of tab portions 122 located at the same end of the main body portion 121 is two, at this time, after the electrode assembly 12 is placed to the designated position, the electrode assembly 12 will generate movement in the X-X direction, and since the number of tab portions 122 is two, when the actual distance L2 between the tab portion 122 and the distance detection component 32 is detected, the actual distance L2 and the expected distance L1 will deviate, and the number of times of deviation is 2, which is consistent with the predetermined number of times, at this time, it can be determined that the electrode assembly 12 is a qualified product.

[0125] The embodiment of the present application can detect the electrode assembly 12 with the tab portions 122 located at the same end by configuring the controller 33 to determine that the detection result of the electrode assembly 12 is qualified according to the number of times of the warning information being 2, and realize detection of whether the appearance of the electrode assembly 12 is qualified or not.

[0126] It can be understood that when the number of tab portions 122 at one end of the main body portion 121 is only one, the deviation of the actual distance L2 and the expected distance L1 will occur once when the electrode assembly 12 is a qualified product, that is, the number of times of abnormality is once, and at this time, the predetermined number of times is also once.

[0127] The case where the electrode assembly 12 is unqualified will be described below. Figures 9 to 12

[0128] In Figure 9 , the number of abnormal portions 123 is two, and the two abnormal portions 123 are located outside the region between the two tab portions 122 in the X-X direction, and have a gap between the tab portions 122, after the electrode assembly 12 is placed to the workbench 31, the actual distance L2 between the designated position of the workbench 31 detected by the distance detection component 32 and the distance detection component 32 will deviate from the preset distance L1 four times, therefore, the number of times of the warning information is four, which is inconsistent with the predetermined number of times 2, and it can be determined that the electrode assembly 12 is unqualified.

[0129] In Figure 10 ​In this process, there is one abnormal part 123, and the abnormal part 123 is located outside the range between the two electrode tabs 122 along the XX direction, and there is a gap between it and the electrode tabs 122. After the electrode assembly 12 is placed on the worktable 31, the actual distance L2 between the designated position of the worktable 31 detected by the distance detection component 32 and the distance detection component 32 will deviate from the preset distance L1 three times. Therefore, the number of warning messages is three times, which is inconsistent with the predetermined number of two times. It can be determined that the electrode assembly 12 is a defective product.

[0130] exist Figure 11 In the process, there is one abnormal part 123, which is located between the two electrode tabs 122 along the XX direction and is spaced apart from the two electrode tabs 122. After the electrode assembly 12 is placed on the worktable 31, the actual distance L2 between the designated position of the worktable 31 detected by the distance detection component 32 and the distance detection component 32 will deviate from the preset distance L1 three times. Therefore, the number of warning messages is three, which is inconsistent with the predetermined number of two. It can be determined that the electrode assembly 12 is a defective product.

[0131] exist Figure 12 In this process, there is one abnormal part 123, which is located between the two electrode tabs 122 along the XX direction and is connected to both electrode tabs 122. After the electrode assembly 12 is placed on the worktable 31, the actual distance L2 between the designated position of the worktable 31 detected by the distance detection component 32 and the distance detection component 32 will deviate from the preset distance L1 once. Therefore, the number of warning messages is once, which is inconsistent with the predetermined number of two. It can be determined that the electrode assembly 12 is a defective product.

[0132] It is important to note that both L1 and L2 here take into account the impact of setting errors. As long as they are within the error range, and L1 and L2 do not overlap after considering the error, they will not be incorrectly identified as deviations during the detection process. For example, if L1 is within the range of 200±10 micrometers, and the actual distance L2 is not within this range, it can be considered that there is a deviation between L2 and L1, which can be identified as an abnormal situation.

[0133] like Figure 4As shown, the tab portion 122 can be divided into a front half and a rear half, with the center line in the Y-Y direction as the dividing line, and the rear half is closer to the main body portion 121. The specified position refers to the rear half of the tab portion 122, which can be the end face of the rear half of the tab portion 122 facing the main body portion 121, or can be a certain distance from the end face of the tab portion 122 facing the main body portion 121, such as 1mm or 2mm. When the abnormal portion 123 is formed on the main body portion 121, the distance detection component 32 can detect the abnormal portion 123.

[0134] In addition, the controller 33 can be selected from common controllers 33, such as Siemens or Hui Chuan controllers 33, to realize the storage function, warning function and judgment function. The specific model can be a product of the S7-1500 series of the Siemens PLC series or a PLC controller of Hui Chuan, such as the GL20 series.

[0135] It should be noted that the electrode assembly appearance detection equipment 30 is mainly used to detect the case where the abnormal portion 123 is formed on the electrode assembly 12. When other appearance items need to be detected, related equipment can be used for detection.

[0136] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0137] The first aspect of the embodiments of the present application provides an electrode assembly appearance detection device 30, the electrode assembly 12 includes a main body part 121 and a tab part 122 connected to each other, the tab part 122 is arranged protruding from the main body part 121, including a workbench 31 movable along a first direction, a distance detection component 32 and a controller 33, the workbench 31 is used to place the electrode assembly 12, wherein the first direction is the length direction or the width direction of the electrode assembly appearance detection device 30; the distance detection component 32 is arranged on one side of the workbench 31 and is used to detect the actual distance between the specified position of the workbench 31 and the distance detection component 32, wherein the specified position is the position passed by the part of the tab part 122 close to the main body part 121; the controller 33 is electrically connected with the distance detection component 32, and the controller 33 is configured to determine that the detection result of the electrode assembly 12 is qualified according to that the number of times of abnormality of the actual distance meets a predetermined number. Further, the workbench 31 is arranged horizontally, the distance detection component 32 is arranged above the workbench 31 along a second direction, and the distance between the distance detection component 32 and the workbench 31 is adjustable, wherein the second direction is the height direction of the electrode assembly appearance detection device 30. Further, the electrode assembly appearance detection device 30 further includes a mounting assembly 34, the mounting assembly 34 includes a first support 341 and a second support 342 arranged at an included angle, the workbench 31 is connected with the first support 341; the distance detection component 32 is movably arranged on the second support 342. Further, the second support 342 is provided with a first sliding groove 3421 extending along a third direction, and the distance detection component 32 can slide along the first sliding groove 3421, wherein the third direction intersects with the first direction and intersects with the second direction. Further, the mounting assembly 34 further includes a third support 343 and a fourth support 344, the third support 343 and the second support 342 are arranged in parallel; the fourth support 344 is connected with the third support 343 and the second support 342 respectively, and the second support 342 can move along the fourth support 344. Further, the fourth support 344 is provided with a second sliding groove 3441 extending along the second direction, and the second support 342 can move along the second sliding groove 3441. Further, the electrode assembly appearance detection device 30 further includes a mounting seat 345, the mounting seat 345 is connected with the first support 341, and the mounting seat 345 is arranged spaced apart from the workbench 31. Further, the controller 33 includes a storage module 331, the storage module 331 is used to store the expected distance between the specified position of the workbench 31 and the distance detection component 32. Further, the controller 33 includes a warning module 332, the warning module 332 is used to issue warning information according to that the deviation of the actual distance from the expected distance is greater than a preset range. Further, the controller 33 is configured to determine that the appearance detection result of the electrode assembly 12 is unqualified according to that the number of times of abnormality of the actual distance does not meet 2 times.

[0138] The above merely provides the preferred embodiments of the present application, and the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electrode assembly appearance inspection apparatus, the electrode assembly including a main body portion and a tab portion connected to each other, the tab portion being provided protruding from the main body portion, characterized by, The electrode assembly appearance detection device comprises: a workbench movable in a first direction, the workbench being used for placing the electrode assembly, wherein the first direction is a length direction or a width direction of the electrode assembly appearance detection device; a distance detection component provided on one side of the workbench and used for detecting an actual distance between a specified position of the workbench and the distance detection component, wherein the specified position is a position passed by a part of the tab closer to the main body; a controller electrically connected with the distance detection component, and the controller is configured to determine that the appearance detection result of the electrode assembly is qualified according to that the number of times of abnormality of the actual distance meets a predetermined number.

2. The electrode assembly appearance inspection apparatus according to claim 1, wherein The workbench is horizontally arranged, the distance detection component is arranged above the workbench in a second direction, and the distance between the distance detection component and the workbench is adjustable, wherein the second direction is a height direction of the electrode assembly appearance detection device.

3. The electrode assembly appearance inspection apparatus according to claim 2, wherein The electrode assembly appearance detection device further comprises a mounting assembly, the mounting assembly comprises a first support and a second support arranged at an included angle, the workbench is connected with the first support; The distance detection component is movably arranged on the second support.

4. The electrode assembly appearance inspection apparatus according to claim 3, wherein A first sliding groove is arranged on the second support, the first sliding groove extends along a third direction, and the distance detection component can slide along the first sliding groove, wherein the third direction intersects with the first direction and intersects with the second direction.

5. The electrode assembly appearance inspection apparatus according to claim 4, wherein The mounting assembly further comprises: a third support, the third support and the second support are arranged in parallel; a fourth support, the fourth support is connected with the third support and the second support respectively, and the second support can move along the fourth support.

6. The electrode assembly appearance inspection apparatus according to claim 5, wherein A second sliding groove is arranged on the fourth support, the second sliding groove extends along the second direction, and the second support can move along the second sliding groove.

7. The electrode assembly appearance inspection apparatus according to any one of claims 3 to 6, wherein The electrode assembly appearance detection device further comprises: a mounting seat connected with the first support, and the mounting seat is arranged apart from the workbench.

8. The electrode assembly appearance inspection apparatus according to any one of claims 1 to 6, wherein The controller comprises a storage module, the storage module is used for storing an expected distance between the specified position of the workbench and the distance detection component.

9. The electrode assembly appearance inspection apparatus according to claim 8, wherein The controller comprises a warning module, the warning module is used for issuing warning information according to that the deviation of the actual distance from the expected distance is greater than a preset range.

10. The electrode assembly appearance inspection apparatus according to any one of claims 1 to 6, wherein The controller is configured to determine that the appearance detection result of the electrode assembly is qualified according to that the number of times of abnormality of the actual distance meets 2 times.

11. A battery production line, characterized by The electrode assembly appearance detection device for detecting the appearance of the electrode assembly comprises the electrode assembly appearance detection device according to any one of claims 1 to 10.

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