Detection mechanism and battery production line

Abstract

A detection mechanism and a battery production line, comprising: a conveying unit (100) for conveying a to-be-detected piece (900); the first detection unit (300) is used for detecting the temperature of the to-be-detected piece (900); the trigger unit (400) is used for detecting the distance between the first detection unit (300) and the to-be-detected piece (900); when the distance between the first detection unit (300) and the to-be-detected piece (900) is smaller than a preset distance value, the trigger unit (400) controls the conveying unit (100) to stop conveying.

Description

Testing institutions and battery production lines

[0001] The present application relates to the field of battery technology, and in particular to a detection mechanism and a battery production line.

[0002] Battery cells need to be temperature tested before being put into storage to ensure product performance. In related technologies, temperature testing mechanisms often have only a single test item for battery cells and poor versatility, which cannot well meet the temperature testing requirements in production.

[0003]

[0004] Based on this, it is necessary to provide a detection mechanism and a battery production line to address the problem that current equipment has poor versatility in detecting battery cells.

[0005] A first aspect of an embodiment of the present application provides a detection mechanism for detecting a piece to be tested, comprising: a conveying unit, for conveying the piece to be tested; a first detection unit, for performing temperature detection on the piece to be tested; and a trigger unit, for detecting the distance between the first detection unit and the piece to be tested; when the distance between the first detection unit and the piece to be tested is lower than a preset distance value, the trigger unit controls the conveying unit to stop conveying.

[0006] In one embodiment, the detection mechanism includes a second detection unit; the second detection unit is used to perform temperature detection on the top surface of the test piece; the first detection unit is used to perform temperature detection on the side surface of the test piece.

[0007] In one embodiment, the detection mechanism includes a frame, the first detection unit is movably arranged on the side of the frame; the second detection unit is movably arranged on the top of the frame; and the conveying unit is inserted into the frame.

[0008] In one embodiment, the first detection unit includes a first movable component, a second movable component and a first temperature probe, the first movable component is movably disposed on the frame along the X-axis direction, the second movable component is movably disposed on the first movable component along the Y-axis direction, and the first temperature probe is movably disposed on the second movable component along the Z-axis direction.

[0009] In one of the embodiments, the conveying unit is disposed in the frame along the X-axis direction.

[0010] In one embodiment, the trigger unit is disposed on one side or two opposite sides of the first temperature probe along the X-axis direction.

[0011] In one embodiment, the first moving component includes a first driver, a slide rail and a slider, the slide rail extends along the X-axis direction and is fixed to the frame, and the first driver can drive the slider to reciprocate relative to the slide rail.

[0012] In one embodiment, the first moving component includes a drag chain, and the first drive is electrically connected to the outside through the drag chain.

[0013] In one embodiment, the second moving component includes a second driver and a movable part; the second driver is fixed on the slider, and the second driver can drive the movable part to reciprocate along the Y-axis direction.

[0014] In one embodiment, the second moving component includes a sensor, and the sensor is used to sense the position of the movable part along the Y-axis direction.

[0015] In one embodiment, the second moving assembly includes a guide rod extending along the Z-axis direction and a fixed frame, the guide rod is arranged on the movable part; the fixed frame is movably arranged on the guide rod, and the first temperature probe is fixed on the fixed frame.

[0016] In one embodiment, the trigger unit includes a micro switch and a controller; the micro switch is used to detect the distance between the first detection unit and the piece to be tested; the micro switch is connected to the controller signal, and when the distance between the first detection unit and the piece to be tested is lower than a preset distance value, the controller controls the conveying unit to stop conveying.

[0017] In one of the embodiments, the detection mechanism further includes a third detection unit; the third detection unit is disposed on the top of the rack and is used to perform insulation withstand voltage detection on the electrode terminals on the top surface of the device under test.

[0018] In one embodiment, the detection mechanism also includes a third detection unit, and the third detection unit includes a probe board, a fixed plate and a third driver; the fixed plate is mounted on the top of the frame; the probe board is movably arranged relative to the fixed plate, and the third driver is used to drive the probe board to approach or move away from the electrode terminal on the top surface of the test piece along the Z-axis direction; the probe board is used to perform insulation withstand voltage detection on the electrode terminal on the top surface of the test piece.

[0019] In one embodiment, the detection mechanism includes a second detection unit; the second detection unit is used to perform temperature detection on the top surface of the device to be tested; the second detection unit is arranged on the probe board; when the probe board is close to the electrode terminal on the top surface of the device to be tested, the second detection unit performs temperature detection on the electrode terminal on the top surface of the device to be tested.

[0020] In one embodiment, the second detection unit includes at least one second temperature probe, and the second temperature probe is a contact temperature probe.

[0021] A second aspect of an embodiment of the present application provides a battery production line, comprising the above-mentioned detection mechanism.

[0022] The beneficial effects are as follows: the detection mechanism and the battery production line of the embodiment of the present application convey the workpiece to be tested by setting a conveying unit, and a first detection unit, to replace manual temperature detection of the workpiece to be tested, and a trigger unit is set to detect the distance between the first detection unit and the workpiece to be tested. In this way, it can be ensured that the workpiece to be tested and the first detection unit are always maintained at an appropriate detection distance, so that the measurement data is more accurate; and when the distance between the workpiece to be tested and the first detection unit is too close, the trigger unit can control the conveying unit to stop conveying, thereby avoiding temperature data with large errors. In addition, interference between the workpiece to be tested and the first detection unit can be avoided in time, so that the versatility of the detection mechanism is better.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work. In the drawings:

[0025] FIG. 1 is a schematic diagram of the structure of a detection mechanism according to an embodiment of the present application.

[0026] FIG. 2 is a schematic diagram of the assembly of the first detection unit and the trigger unit according to an embodiment of the present application.

[0027] FIG3 is a schematic diagram of the assembly of the first detection unit and the trigger unit according to an embodiment of the present application, wherein the first moving component is omitted.

[0028] FIG. 4 is a schematic diagram of the detection mechanism and the test piece according to an embodiment of the present application, wherein the frame is omitted.

[0029] Description of reference numerals:

[0030] Conveying unit 100, second detection unit 200, second temperature probe 210, first detection unit 300, first temperature probe 310, first moving component 320, first driver 321, slide rail 322, slider 323, drag chain 324, second moving component 330, second driver 331, movable part 332, sensor 333, guide rod 334, fixed frame 335, trigger unit 400, micro switch 410, rack 500, third detection unit 600, probe plate 610, fixed plate 620, third driver 630, device to be tested 900, electrode terminal 910.

[0031] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. appear, these terms are only used for descriptive purposes 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.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the description of the embodiments of the present application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" refers to more than two groups (including two groups), and if the term "multiple sheets" appears, "multiple sheets" refers to more than two sheets (including two sheets).

[0037] In the description of the embodiments of the present application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0041] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0042] Battery cells need to undergo a series of tests during the production process of the assembly line, including but not limited to the terminal temperature test on the top surface of the battery cell, the battery cell voltage, and the insulation withstand voltage performance between the battery cells. The test items are a checkpoint for the safety inspection of the battery cells and are crucial to the safety control of the product. The inventors noticed that due to the size differences of different types of battery cells themselves, the conveying unit transports the battery cells to the inspection stations at the corresponding positions during the conveying process. The battery cells at the inspection stations have different thicknesses, heights, or angles at which they are placed on the inspection stations, which will cause the distance and position differences between the areas to be inspected of the battery cells. For the temperature detection unit of the battery cells in the inspection mechanism, if it targets multiple types of battery cells at the same time, the distance between the precise temperature probe and the area to be inspected will affect the accuracy of the detection if it is too far or too close to the area to be inspected. In addition, it is necessary to consider that the precise temperature probe will interfere with the battery cells and cause damage, resulting in poor versatility.

[0043] In order to alleviate the problem of poor versatility, the applicant has found that a trigger unit can be set to detect the battery cells transported by the conveying unit at the detection station, thereby improving versatility. In addition, the temperature of the large surface of the side of the battery cell and the terminal temperature of the top surface of the battery cell can be detected at the same station to improve the detection efficiency.

[0044] Based on the above considerations, the inventors have conducted in-depth research and designed a detection mechanism that can be used to detect battery cells to be tested. By transporting the battery cells to the corresponding detection stations, the temperature of the battery cells can be detected. Taking into account the position differences of the battery cells during the transportation process, collision or position deviation can be prevented by controlling the distance between the battery cells and the detection mechanism.

[0045] The battery disclosed in the embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery pack, etc. Some batteries may include a separate casing for encapsulating one or more battery cells or multiple battery modules. The casing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. Of course, there are also some batteries that may not include the above-mentioned separate casing, and directly set the battery cells or battery modules in the battery installation compartment of the electrical device, that is, the battery installation compartment serves as a casing.

[0046] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery cells and batteries disclosed in the present application can be used to form the electrical device.

[0047] In the embodiments of the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., which is not limited in the embodiments of the present application. Battery cells are generally divided into three types according to the packaging method: cylindrical cells, square cells and soft-pack cells, which is not limited in the embodiments of the present application.

[0048] In the embodiment of the present application, the battery cell may include a housing, an electrode assembly and an electrolyte.

[0049] Functional components such as electrode terminals may be provided on the housing, and the electrode terminals may be used to electrically connect to the electrode assembly for outputting or inputting electrical energy of the battery cell. The internal environment formed in the housing may be used to accommodate the electrode assembly, electrolyte, and other components.

[0050] The electrode assembly is the part of the battery cell where the electrochemical reaction occurs. The housing may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet.

[0051] 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 positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.

[0052] 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 negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon, etc.

[0053] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0054] In order to ensure that a large current can pass without melting, there are multiple positive electrode tabs stacked together, and multiple negative electrode tabs stacked together. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0055] The first aspect of the present application provides a detection mechanism for detecting a device under test 900, and the detection items may include but are not limited to temperature. The device under test 900 may be a battery cell, an electrode assembly or a battery. For ease of understanding, in the following embodiments, the device under test 900 is illustrated as one or more battery cells.

[0056] 1 to 4 , a detection mechanism includes: a conveying unit 100 , a first detection unit 300 and a trigger unit 400 .

[0057] The conveying unit 100 is used to convey the test piece 900. Specifically, one or more carriers are provided on the conveying unit 100, and each carrier is provided with a positioning groove 110 suitable for carrying the test piece 900. The conveying unit 100 moves along a prescribed path, so that the test piece 900 carried by the carrier can move along the prescribed path and move to the detection station in the detection mechanism, thereby ensuring that the test piece 900 at the detection station can be smoothly detected by the first detection unit 300 and smoothly load and unload. For example, the conveying unit 100 can be a conveyor belt, a slide rail, a magnetic suspension track, etc.

[0058] The first detection unit 300 is used to perform temperature detection on the object to be tested 900 .

[0059] As shown in FIG4 , the trigger unit 400 is used to detect the distance A between the first detection unit 300 and the piece to be tested 900. When the distance A between the first detection unit 300 and the piece to be tested 900 is lower than the preset distance value, the trigger unit 400 controls the conveying unit 100 to stop conveying. The preset distance value can be set according to the different models and types of the piece to be tested 900, and the value can be pre-set by a limited number of data accumulations or theoretical calculations or given by designers.

[0060] In this way, the workpiece to be tested 900 is transported by the conveying unit 100, and combined with the first detection unit 300, the detection of the workpiece to be tested 900 can be replaced by manual detection, and the trigger unit 400 is set to detect the distance A between the first detection unit 300 and the workpiece to be tested 900. In this way, it can be ensured that the workpiece to be tested 900 and the first detection unit 300 are always maintained at an appropriate detection distance, so that the measurement data is more accurate; and when the distance between the workpiece to be tested 900 and the first detection unit 300 is too close, the trigger unit 400 can control the conveying unit 100 to stop conveying, thereby avoiding temperature data with large errors. In addition, interference between the workpiece to be tested 900 and the first detection unit 300 can be avoided in time, so that the versatility of the detection mechanism is better.

[0061] In the related art, the large surface temperature detection of the battery cell side and the terminal temperature detection of the battery cell top are completed in two stations, resulting in low space utilization.

[0062] In some embodiments, the detection mechanism includes a second detection unit 200 ; the second detection unit 200 is used to perform temperature detection on the top surface of the object to be tested 900 ; the first detection unit 300 is used to perform temperature detection on the side surface of the object to be tested 900 .

[0063] The second detection unit 200 can be used to perform temperature detection on the top surface of the test piece 900. That is, after the test piece 900 is transported to the detection station by the transport unit 100, the second detection unit 200 performs temperature detection on the test piece 900 at the detection station, and the detected parts include: at least one of the top surface of the shell of the test piece 900 (i.e., the upper end surface of the shell with the electrode terminal 910; correspondingly, the lower end surface of the shell without the terminal can be considered as the bottom surface) and the components arranged on the top surface (including but not limited to the electrode terminal 910, explosion-proof pressure relief valve, etc.). The temperature detection here can be performed using a contact temperature sensor or an infrared temperature sensor.

[0064] The first detection unit 300 is used to perform temperature detection on the side of the test piece 900. That is, after the test piece 900 is transported to the detection station by the conveying unit 100, the first detection unit 3000 performs temperature detection on the test piece 900 at the detection station, and the detected parts include: the side of the shell of the test piece 900, and at least one of the components arranged on the side. It should be noted that if the test piece 900 is a square battery cell, the shell of the test piece 900 includes a plurality of enclosed side surfaces connected between the top surface and the bottom surface of the shell of the test piece 900; wherein, among the plurality of side surfaces, the side surface with a relatively large area is a large side surface, and the side surface with a relatively small area is a connecting surface. If the test piece 900 is a cylindrical battery cell, the peripheral surface connected between the top surface and the bottom surface of the shell of the test piece 900 is a side surface.

[0065] The test piece 900 is transported by the conveying unit 100. Combined with the second detection unit 200 on the top and the first detection unit 300 on the side, the temperature detection of the top and side surfaces of the test piece 900 can be realized instead of manual work. The detection items are more numerous, more comprehensive and more efficient, thus avoiding safety accidents caused by defects in the test piece 900 and improving safety performance.

[0066] In some embodiments, as shown in FIG. 1 , the detection mechanism includes a frame 500 , a first detection unit 300 is movably disposed on a side of the frame 500 ; a second detection unit 200 is movably disposed on the top of the frame 500 ; and a conveying unit 100 is disposed in the frame 500 .

[0067] The first detection unit 300 may include a first movable assembly 320, a second movable assembly 330, and a first temperature probe 310. The first movable assembly 320 is movably disposed on the frame 500 along the X-axis direction, the second movable assembly 330 is movably disposed on the first movable assembly 320 along the Y-axis direction, and the first temperature probe 310 is movably disposed on the second movable assembly 330 along the Z-axis direction.

[0068] In this way, the first temperature probe 310 on the first detection unit 300 can adjust its position through the first moving component 320 and the second moving component 330, so that the distance A between the first temperature probe 310 and the object to be tested 900 is maintained in a suitable range, ensuring the detection accuracy of the first temperature probe 310. When the distance A between the first temperature probe 310 and the object to be tested 900 is lower than the preset distance value, the trigger unit 400 controls the conveying unit 100 to stop conveying, so as to avoid a large error in the temperature data of the first temperature probe 310, and also timely avoid interference between the object to be tested 900 and the first temperature probe 310.

[0069] Optionally, the first temperature probe 310 is an infrared temperature probe. The infrared temperature probe has certain requirements for the measurement distance. When the test piece 900 switches models or is tilted, the infrared temperature probe is too close to the test piece 900. By setting the trigger unit 400, the conveying unit 100 can be controlled to stop conveying in time, avoiding the infrared temperature probe from generating temperature data with large errors, and also avoiding the collision between the test piece 900 and the first detection unit 300 in time, thereby finally avoiding damage to the detection mechanism.

[0070] It should be noted that in each embodiment of the present application, the direction from the top surface of the test piece 900 to the bottom surface is the Z-axis direction, and the X-axis direction, the Y-axis direction and the Z-axis direction intersect each other, and the intersection angle can be 90° or slightly larger or slightly smaller. Usually, the test piece 900 can be set vertically, in which case the Z-axis direction is the vertical direction, and the X-axis direction and the Y-axis direction can be two horizontal directions that intersect vertically in the horizontal plane.

[0071] In some embodiments, referring to FIGS. 1 to 4 , the trigger unit 400 includes a micro switch 410 and a controller (not shown); the micro switch 410 is used to detect the distance A between the first detection unit 300 and the piece to be tested 900; the micro switch 410 is connected to the controller signal, and when the distance between the first detection unit 300 and the piece to be tested 900 is lower than a preset distance value, the controller controls the conveying unit 100 to stop conveying.

[0072] Specifically, the controller of the trigger unit 400 can be a CPU; the controller can be connected to the second temperature probe 210 (mentioned below) of the second detection unit 200, the first temperature probe 310 (mentioned below) of the first detection unit 300, and the micro switch 410 signal to collect corresponding data; the controller controls the connection conveying unit 100, the first driver 321 (mentioned below) of the first moving component 320, the second driver 331 (mentioned below) of the second moving component 330, and the third driver 630 (mentioned below) of the third detection unit 600 (mentioned below); in this way, the controller coordinates the actions of each moving part according to the collected corresponding data.

[0073] In some embodiments, the conveying unit 100 shown in FIG. 1 is arranged in the frame 500 along the X-axis direction. In this way, when the workpiece 900 to be tested is conveyed to the corresponding testing station along the X-axis direction, the first testing unit 3000 performs temperature testing on the side surface of the workpiece 900 to be tested; the second testing unit 200 performs temperature testing on the top surface of the workpiece 900 to be tested at the testing station; the temperature testing of the top surface and side surface of the workpiece 900 to be tested can be realized instead of manual work, and the testing items are more, more comprehensive and more efficient.

[0074] In some embodiments, referring to FIG. 2 , the trigger unit 400 may be disposed on one side or two opposite sides of the first temperature probe 310 along the X-axis direction.

[0075] Specifically, the micro switch 410 of the trigger unit 400 can be arranged on one side of the first temperature probe 310 along the X-axis direction. The conveying unit 100 transports the test piece 900 to one side along the X-axis direction, so that the micro switch 410 can detect the test piece 900 on the conveying unit 100 before the first temperature probe 310 to prevent collision.

[0076] As shown in combination with Figures 1 to 3, the micro switch 410 of the trigger unit 400 can be set on opposite sides of the first temperature probe 310 along the X-axis direction. The conveying unit 100 transports the test piece 900 to any side along the X-axis direction. In this way, no matter which side the conveying unit 100 transports, the micro switch 410 can detect the test piece 900 on the conveying unit 100 before the first temperature probe 310 to prevent collision; this is conducive to the normal production of the battery production line or reversing the conveyor belt in other cases.

[0077] In some embodiments, referring to FIG. 1 and FIG. 2 , the first moving component 320 includes a first driver 321, a slide rail 322 and a slider 323. The slide rail 322 extends along the X-axis direction and is fixed to the frame 500. The slider 323 is slidably disposed on the slide rail 322. The first driver 321 can drive the slider 323 to reciprocate relative to the slide rail 322.

[0078] The first driver 321 can be a servo motor or a cylinder. Taking the servo motor as an example, the first driver 321 is controlled by a PLC (not shown), and the motion accuracy is higher. In this way, the slider 323 can be accurately driven to move along the X-axis direction relative to the slide rail 322, and then the position of the second moving component 330 and the first temperature probe 310 in the X-axis direction can be adjusted.

[0079] In some embodiments, referring to FIG. 2 and FIG. 3 , the second moving assembly 330 includes a second driver 331 and a movable member 332; the second driver 331 is fixed on the slider 323, and the second driver 331 can drive the movable member 332 to reciprocate along the Y-axis direction. The first temperature probe 310 can be movably arranged at the end of the movable member 332 along the Z-axis direction.

[0080] The movable part 332 may be a rod or a plate; the second driver 331 may be a cylinder or a servo motor. Taking the cylinder as an example, the telescopic rod in the cylinder of the second driver 331 is arranged along the Y-axis direction. When air is supplied to the second driver 331, the telescopic rod of the second driver 331 drives the movable part 332 to extend along the Y-axis direction. Combined with the position shown in FIG4 , the movable part 332 drives the first temperature probe 310 to move to the left along the Y-axis direction, which is equivalent to approaching the test piece 900; when air is pumped to the second driver 331, the telescopic rod of the second driver 331 drives the movable part 332 to retract along the Y-axis direction. Combined with the position shown in FIG4 , the movable part 332 drives the first temperature probe 310 to move to the right along the Y-axis direction, which is equivalent to moving away from the test piece 900.

[0081] In this way, when the type or model of the test piece 900 on the battery production line is changed, the distance A between the first temperature probe 310 and the test piece 900 along the Y-axis direction can be adjusted in time by setting the second driver 331 and the movable part 332, so that the test piece 900 and the first detection unit 300 are always maintained at a suitable detection distance, making the measurement data more accurate and avoiding unnecessary collisions.

[0082] Optionally, as shown in FIG1 , the first moving assembly 320 includes a drag chain 324, and the first driver 321 is electrically connected to the outside through the drag chain 324. The drag chain 324 is built with cables or air pipes for the first driver 321 and the second driver 331. During the reciprocating movement of the slider 323 relative to the slide rail 322, the drag chain 324 plays a role of traction and protection for the cables or air pipes, thereby extending the service life of the detection mechanism.

[0083] Optionally, the second driver 331 may be a servo motor, and the second moving assembly 330 includes a sensor 333 , which is used to sense the position of the movable member 332 along the Y-axis direction.

[0084] The sensor 333 may be a photoelectric sensor or an electromagnetic sensor. The second moving assembly 330 may include three sensors 333, which are sequentially arranged on the body of the second driver 331 along the Y-axis direction to sense the position of the movable member 332 along the Y-axis direction. The position of the middle sensor 333 in the Y-axis direction may be set as the origin; the position of the sensor 333 far from the first moving assembly 320 in the Y-axis direction is the farthest point of the movable member 332 extending along the Y-axis direction, and the value of the distance A is the smallest at this time; the position of the sensor 333 close to the first moving assembly 320 in the Y-axis direction is the closest point of the movable member 332 retracting along the Y-axis direction, and the value of the distance A is the largest at this time.

[0085] Through the three sensors 333, the position of the second driver 331 can be flexibly controlled by PLC, and the positions of the two ends can be accurately controlled by relying on the origin.

[0086] In some embodiments, referring to FIGS. 1 to 4 , the second moving assembly 330 includes a guide rod 334 extending along the Z-axis direction and a fixing frame 335, wherein the guide rod 334 is disposed on the movable member 332. The fixing frame 335 is movably disposed on the guide rod 334, and the first temperature probe 310 is fixed on the fixing frame 335.

[0087] Specifically, the guide rod 334 can be generally disposed at the end of the movable member 332 to prevent the protruding movable member 332 from colliding with the test piece 900. The first temperature probe 310 is fixed on the fixing frame 335. The micro switch 410 can be disposed on the fixing frame 335 by means of a bolt or the like, and is located on one side or both sides of the first temperature probe 310 along the X-axis direction.

[0088] In this way, when the first movable component 320 and the second movable component 330 adjust the distance in the X-axis direction and the Y-axis direction, and the fixed frame 335 adjusts the distance along the Z-axis direction relative to the guide rod 334, the micro switch 410 can adjust the position in the X-axis direction, the Y-axis direction and the Z-axis direction together with the first temperature probe 310, and the micro switch 410 and the first temperature probe 310 remain relatively fixed, ensuring that the micro switch 410 can detect the test piece 900 on the conveying unit 100 before the first temperature probe 310 to prevent collision.

[0089] In some embodiments, the trigger unit 400 further includes an alarm device (not shown), and the controller controls the connection of the alarm device.

[0090] Specifically, when the distance A between the first detection unit 300 and the test piece 900 is lower than a preset distance value, the controller controls the conveying unit 100 to stop conveying, and can control the alarm device to issue a corresponding alarm to remind the operator to troubleshoot.

[0091] In some embodiments, referring to FIG. 1 and FIG. 4 , the detection mechanism further includes a third detection unit 600 ; the third detection unit 600 is disposed on the top of the rack 500 and is used to perform insulation withstand voltage detection on the electrode terminal 910 on the top surface of the device to be tested 900 .

[0092] During the insulation withstand voltage test, the third test unit 600 applies a voltage to the DUT 900 for a specified period of time, and then detects whether the leakage current is within a specified range to determine whether the positive and negative electrodes of the battery cell are short-circuited. Generally, the applied voltage is 800 to 1500V.

[0093] In some embodiments, referring to FIG. 1 and FIG. 4 , the third detection unit 600 includes a probe board 610, a fixed plate 620 and a third driver 630; the fixed plate 620 is mounted on the top of the frame 500; the probe board 610 is movably arranged relative to the fixed plate 620, and the third driver 630 is used to drive the probe board 610 to approach or move away from the electrode terminal 910 on the top surface of the device to be tested 900 along the Z-axis direction; the probe board 610 is used to perform insulation withstand voltage detection on the electrode terminal 910 on the top surface of the device to be tested 900.

[0094] The probe card 610 may be a metal conductor plate, such as a copper plate, a copper-clad steel plate, an aluminum plate, etc.

[0095] The probe plate 610 is located below the fixing plate 620 along the Z-axis direction and is movably arranged.

[0096] The third driver 630 may be a cylinder or a motor. A guide cylinder 621 may be provided on the fixing plate 620, one end of the guide post 640 is connected to the probe plate 610, and the guide post 640 may be inserted into the guide cylinder 621. When the third driver 630 drives the probe plate 610, the guide post 640 is guided by the guide cylinder 621 so that the probe plate 610 approaches or moves away from the electrode terminal 910 on the top surface of the DUT 900 along the Z-axis direction.

[0097] Thus, when the probe plate 610 contacts the electrode terminal 910 of the DUT 900, the power supply component (not shown) in the third detection unit 600 applies a preset voltage to the probe plate 610 and maintains it for a certain period of time, and then detects whether the leakage current is within a specified range to determine whether the positive and negative electrodes of the battery cell are short-circuited. In this embodiment, the preset voltage is 1000V.

[0098] When the insulation withstand voltage test is completed, the probe plate 610 moves upward along the Z-axis direction and is separated from the electrode terminals 910 of the device under test 900 .

[0099] In some embodiments, the second detection unit 200 is disposed on the probe card 610 ; when the probe card 610 is close to the electrode terminal 910 on the top surface of the DUT 900 , the second detection unit 200 performs temperature detection on the electrode terminal 910 on the top surface of the DUT 900 .

[0100] Specifically, when the probe board 610 contacts the electrode terminal 910 of the test piece 900, the second temperature probe 210 of the second detection unit 200 also contacts the electrode terminal 910, and the third detection unit 600 performs an insulation withstand voltage test on the test piece 900, and the second temperature probe 210 of the second detection unit 200 performs temperature detection on the electrode terminal 910 on the top surface of the test piece 900, thereby improving the detection efficiency and the production cycle; at the same time, different detection mechanisms in the related technology can also be combined so that the detection mechanism of the present application can achieve three uses in one machine.

[0101] In some embodiments, the second detection unit 200 includes at least one second temperature probe 210 .

[0102] Generally, there are 2 to 10 second temperature probes 210 distributed on the second detection unit 200, which are different according to the number of electrode assemblies of the battery cell, and each second temperature probe 210 is respectively connected to the controller signal. When the probe card 610 contacts the electrode terminal 910 of the DUT 900, the plurality of second temperature probes 210 can respectively measure the temperature of the terminals on different electrode assemblies.

[0103] In various embodiments of the present application, the second temperature probe 210 may be a contact temperature probe, which has the advantages of high detection accuracy and high temperature resistance.

[0104] In some other embodiments, the second temperature probe 210 may also be an infrared temperature probe, depending on the specific design.

[0105] A second aspect of the present application provides a battery production line, comprising the above-mentioned detection mechanism.

[0106] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

A detection mechanism, used for detecting a piece to be detected (900), characterized in that: The detection mechanism comprises: a conveying unit (100) for conveying the test piece (900); a first detection unit (300) for performing temperature detection on the test piece (900); and a trigger unit (400) for detecting the distance between the first detection unit (300) and the test piece (900); when the distance between the first detection unit (300) and the test piece (900) is lower than a preset distance value, the trigger unit (400) controls the conveying unit (100) to stop conveying. The detection mechanism according to claim 1 is characterized in that: The detection mechanism comprises a second detection unit (200); the second detection unit (200) is used to perform temperature detection on the top surface of the test piece (900); and the first detection unit (300) is used to perform temperature detection on the side surface of the test piece (900). The detection mechanism according to claim 1 or 2, characterized in that: The detection mechanism comprises a frame (500); the first detection unit (300) is movably arranged on the side of the frame (500); the second detection unit (200) is movably arranged on the top of the frame (500); and the conveying unit (100) is inserted into the frame (500). The detection mechanism according to any one of claims 1 to 3, characterized in that: The first detection unit (300) comprises a first movable component (320), a second movable component (330) and a first temperature probe (310); the first movable component (320) is movably arranged on the frame (500) along an X-axis direction; the second movable component (330) is movably arranged on the first movable component (320) along a Y-axis direction; and the first temperature probe (310) is movably arranged on the second movable component (330) along a Z-axis direction. The detection mechanism according to claim 4 is characterized in that: The conveying unit (100) is arranged in the frame (500) along the X-axis direction. The detection mechanism according to claim 4 or 5, characterized in that: The trigger unit (400) is arranged on one side or two opposite sides of the first temperature probe (310) along the X-axis direction. The detection mechanism according to any one of claims 4 to 6, characterized in that: The first moving component (320) comprises a first driver (321), a slide rail (322) and a slider (323); the slide rail (322) extends along the X-axis direction and is fixed to the frame (500); the first driver (321) is capable of driving the slider (323) to reciprocate relative to the slide rail (322). The detection mechanism according to claim 7 is characterized in that: The first moving component (320) includes a drag chain (324), and the first driver (321) is electrically connected to the outside via the drag chain (324). The detection mechanism according to any one of claims 4 to 8, characterized in that: The second moving component (330) comprises a second driver (331) and a movable part (332); the second driver (331) is fixed on the slider (323), and the second driver (331) can drive the movable part (332) to reciprocate along the Y-axis direction. The detection mechanism according to claim 9 is characterized in that: The second moving component (330) comprises a sensor (333), and the sensor (333) is used to sense the position of the movable part (332) along the Y-axis direction. The detection mechanism according to claim 9 or 10 is characterized in that: The second moving assembly (330) comprises a guide rod (334) extending along the Z-axis direction and a fixed frame (335), wherein the guide rod (334) is arranged on the movable part (332); the fixed frame (335) is movably arranged on the guide rod (334), and the first temperature probe (310) is fixedly arranged on the fixed frame (335). The detection mechanism according to any one of claims 1 to 11, characterized in that: The trigger unit (400) comprises a micro switch (410) and a controller; the micro switch (410) is used to detect the distance between the first detection unit (300) and the object to be tested (900); the micro switch (410) is connected to the controller signal, and when the distance between the first detection unit (300) and the object to be tested (900) is lower than a preset distance value, the controller controls the conveying unit (100) to stop conveying. The detection mechanism according to any one of claims 1 to 11, characterized in that: The detection mechanism further comprises a third detection unit (600); the third detection unit (600) is arranged on the top of the frame (500) and is used to perform insulation withstand voltage detection on the electrode terminal (910) on the top surface of the test piece (900). The detection mechanism according to claim 3 is characterized in that: The detection mechanism also includes a third detection unit (600), and the third detection unit (600) includes a probe board (610), a fixing plate (620) and a third driver (630); the fixing plate (620) is mounted on the top of the frame (500); the probe board (610) is movably arranged relative to the fixing plate (620), and the third driver (630) is used to drive the probe board (610) to approach or move away from the electrode terminal (910) on the top surface of the test piece (900) along the Z-axis direction; the probe board (610) is used to perform insulation withstand voltage detection on the electrode terminal (910) on the top surface of the test piece (900). The detection mechanism according to claim 14 is characterized in that: The detection mechanism comprises a second detection unit (200); the second detection unit (200) is used to perform temperature detection on the top surface of the device to be tested (900); the second detection unit (200) is arranged on the probe board (610); when the probe board (610) is close to the electrode terminal (910) on the top surface of the device to be tested (900), the second detection unit (200) performs temperature detection on the electrode terminal (910) on the top surface of the device to be tested (900). The detection mechanism according to claim 2 or 15, characterized in that: The second detection unit (200) comprises at least one second temperature probe (210), and the second temperature probe (210) is a contact temperature probe. A battery production line, characterized in that: Comprising a detection mechanism as described in any one of claims 1 to 16.

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