Battery cell electrode detection device and system

Abstract

The present application discloses a battery cell pole piece detection device and system. The device includes: a first guide structure; a second guide structure, which is installed on the first guide structure and can move along the first guide direction of the first guide structure; a battery cell identification device, which is installed on the second guide structure and can move along the second guide direction of the second guide structure, for scanning and identifying the interface parameters of each position of the battery cell pole piece; wherein the first guide direction intersects with the second guide direction. The present application solves the technical problem that in the related art, when detecting the interface state of the battery cell pole piece, manual judgment is required, resulting in low detection efficiency, easy missed detection, and false detection.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell pole piece detection, and in particular, to a battery cell pole piece detection device and system. Background Art

[0002] Currently, when conducting short-term performance acceptance of lithium-ion batteries, it is necessary to disassemble the battery cells and observe the interface status of the battery cells to determine whether they meet the corresponding requirements.

[0003] In the actual disassembly and judgment process, most people currently rely on the naked eye to make judgments, characterize the abnormal phenomena on the electrode interface and measure the area of ​​the abnormal phenomena. The manual detection method is cumbersome and inefficient, and is prone to problems such as missed judgment and misjudgment of certain areas on the electrode.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Utility Model Content

[0005] The embodiments of the present application provide a battery cell pole piece detection device and system to at least solve the technical problems of low detection efficiency, easy missed detection and false detection caused by the need for manual judgment when detecting the interface state of the battery cell pole piece in the related technology.

[0006] According to one aspect of an embodiment of the present application, a battery cell pole piece detection device is provided, comprising: a first guide structure; a second guide structure, installed on the first guide structure, and movable along a first guide direction of the first guide structure; a battery cell identification device, installed on the second guide structure, and movable along a second guide direction of the second guide structure, for scanning and identifying interface parameters of various positions of the battery cell pole piece; wherein the first guide direction intersects with the second guide direction.

[0007] Optionally, the device further includes: a supporting structure for supporting the first guiding structure.

[0008] Optionally, the device further includes: a platform for carrying the battery cell pole piece; and a battery cell pole piece fixing device, which is arranged on the platform and is used to fix the battery cell pole piece on the platform.

[0009] Optionally, the arrangement direction of the battery cell pole pieces is parallel to the first guiding direction, or the arrangement direction of the battery cell pole pieces is parallel to the second guiding direction.

[0010] Optionally, the length of the placement plane of the platform in the first guide direction is consistent with the unfolded length of the battery cell pole piece, or the length of the placement plane of the platform in the second guide direction is consistent with the unfolded length of the battery cell pole piece.

[0011] Optionally, the device also includes: a first limiting structure connected to the second guiding structure, used to limit the movement of the second guiding structure along the first guiding direction; a second limiting structure connected to the first guiding structure, used to limit the movement of the first guiding structure along the second guiding direction.

[0012] Optionally, the first guide structure is a longitudinal positioning track, the first guide direction of the first guide structure is the longitudinal direction, the second guide structure is a transverse positioning track, the second guide direction of the second guide structure is the transverse direction, and the battery cell identification device is installed at the intersection between the transverse positioning track and the longitudinal positioning track, moves laterally with the transverse movement of the longitudinal positioning track, and moves longitudinally with the longitudinal movement of the transverse positioning track.

[0013] Optionally, the first limiting structure is a longitudinal limiting rail, and the second limiting structure is a transverse limiting rail. The two ends of the transverse positioning rail are arranged in the rail groove of the longitudinal limiting rail for longitudinal movement along the longitudinal limiting rail; the two ends of the longitudinal positioning rail are arranged in the rail groove of the transverse limiting rail for transverse movement along the transverse limiting rail.

[0014] According to another aspect of the embodiment of the present application, a battery cell pole piece detection system is also provided, including: a battery cell pole piece detection device and a processing device, wherein the battery cell pole piece detection device includes: a first guide structure; a second guide structure, installed on the first guide structure, movable along a first guide direction of the first guide structure; a battery cell identification device, installed on the second guide structure, movable along a second guide direction of the second guide structure, for scanning and identifying interface parameters of various positions of the battery cell pole piece; wherein the first guide direction intersects with the second guide direction; a processing device, connected to the battery cell identification device via a communication link, for acquiring interface parameters scanned by the battery cell identification device, wherein the interface parameters include: chromaticity.

[0015] Optionally, the battery cell pole piece detection system also includes: a display device, wherein the display device is connected to the processing device, and is used to display abnormal areas in the battery cell pole pieces determined by the processing device, wherein the abnormal areas include: black spot areas, purple spot areas, and lithium deposition areas, and different abnormal areas correspond to different chromaticity intervals.

[0016] In an embodiment of the present application, a battery cell pole piece detection device including a first guide structure, a second guide structure and a battery cell identification device is used, wherein the second guide structure is installed on the first guide structure and can move along the first guide direction of the first guide structure; the battery cell identification device is installed on the second guide structure and can move along the second guide direction of the second guide structure, and is used to scan and identify interface parameters of various positions of the battery cell pole piece; wherein the first guide direction intersects with the second guide direction, and the movement of the battery cell identification device is controlled by the movement of the first guide structure and the second guide structure, thereby achieving the purpose of automatically scanning and identifying various position areas of the battery cell pole piece by the battery cell identification device in turn, thereby solving the technical problems of low detection efficiency, easy missed detection and false detection caused by the need for manual judgment when detecting the interface state of the battery cell pole piece in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of a battery cell electrode piece detection device provided according to an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of a pole piece placement and identification device structure provided according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of another electrode placement and identification device structure provided according to an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of a top view of a pole piece placement and identification device structure provided according to an embodiment of the present application;

[0022] Figure 5 is a schematic diagram of a top view of a battery cell electrode piece detection system provided according to an embodiment of the present application;

[0023] Figure 6 It is a schematic diagram of a platform for placing battery cell pole pieces provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] When conducting short-term performance acceptance of lithium-ion batteries, it is necessary to disassemble the battery cell and observe the interface state of the battery cell to determine whether it meets the corresponding requirements. At the same time, in many current scenarios, the short-term electrode interface requirements for the battery cell are: the area ratio or absolute value of the abnormal phenomenon is ≤ a certain agreed value.

[0027] In the actual disassembly and judgment process, the most commonly used method is to use the naked eye to judge the abnormal phenomenon and to determine the area of ​​the abnormal phenomenon manually. Whether it is the qualitative or quantitative determination of the abnormal phenomenon, it is done manually, which is controversial and subjective, making it unsuitable as a standard evaluation method. In addition, manual judgment has problems such as low detection efficiency, easy missed detection, and false detection.

[0028] In order to solve the above problems, relevant solutions are provided in the embodiments of the present application, which are described in detail below.

[0029] According to an embodiment of the present application, an embodiment of a battery cell pole piece detection device is provided. Figure 1 Schematic diagram of a battery cell electrode detection device provided according to an embodiment of the present application. Figure 1 As shown, the device comprises:

[0030] A first guide structure 11, in this embodiment, the first guide structure may be supported by a support structure 31;

[0031] The second guide structure 12 is installed on the first guide structure 11 and can move along the first guide direction of the first guide structure 11;

[0032] The battery cell identification device 21 is installed on the second guide structure 12 and can move along the second guide direction of the second guide structure 12 to scan and identify the interface parameters of each position of the battery cell electrode;

[0033] In an embodiment of the present application, the first guiding direction and the second guiding direction intersect with each other, for example, they may be perpendicular to each other in a horizontal plane, that is, one is horizontal and the other is vertical.

[0034] Through the above structure, the movement of the battery cell identification device 21 is controlled by moving the first guide structure 11 and the second guide structure 12, so that the battery cell identification device can automatically scan and identify each position area of ​​the battery cell electrode in turn, thereby solving the technical problems of low detection efficiency, missed detection and false detection caused by manual judgment when detecting the interface state of the battery cell electrode in the related technology.

[0035] The following is an example of the present application Figure 1 The battery cell electrode detection device shown in is further introduced.

[0036] In order to realize the scanning of the battery cell pole pieces, the battery cell pole piece detection device also includes a platform 41 for carrying the battery cell pole pieces, and a battery cell pole piece fixing device 42 arranged on the edge of the platform 41, wherein the battery cell pole piece fixing device 42 is used to fix the battery cell pole pieces on the placement plane of the platform 41 so that the battery cell pole pieces can be spread out flat.

[0037] In the embodiment of the present application, the specific form of the above-mentioned battery cell pole piece fixing device 42 is not limited. It is only necessary to ensure that the pole piece is completely horizontally extended without wrinkles or overlaps. For example, the above-mentioned battery cell pole piece fixing device 42 can be a mechanical clamping type component, such as a claw-type or snap-on mechanical structure such as an alligator clip, which is used to clamp the battery cell pole piece on a placement plane; or, the battery cell pole piece fixing device 42 can also be an elastic clamp, which uses the characteristics of elastic materials such as rubber, silicone, etc. to fix the battery cell pole piece inside the clamp, and has the characteristics of softness, easy flexibility, and not easy to scratch the battery cell pole piece.

[0038] In addition, in order to make the length of the battery cell electrode sheet adapt to the working surface (placing plane) of the platform 41, in the embodiment of the present application, the length of the placement plane of the platform 41 in the first guide direction can be set to be consistent with the unfolded length of the battery cell electrode sheet, and the placement direction of the battery cell electrode sheet can be set to be parallel to the first guide direction; or the length of the placement plane of the platform 41 in the second guide direction can be set to be consistent with the unfolded length of the battery cell electrode sheet, and the placement direction of the battery cell electrode sheet can be set to be parallel to the second guide direction, so that the battery cell electrode sheets are flattened into one or more sections on the platform.

[0039] As a match, in the embodiment of the present application, a fixing device and a guide structure (i.e., a first guide structure 11 and a second guide structure 12) of the battery cell identification device 21 are provided above the platform 41 to support the mobile scanning of the battery cell identification device 21, wherein the setting of the guide structure needs to enable the battery cell identification device 21 to scan the complete electrode area, and the battery cell identification device 21 needs to be placed vertically to be able to vertically collect the state of the electrode area;

[0040] In order to limit the guiding direction of the guiding structure, the battery cell pole piece detection device in the embodiment of the present application also includes a limiting structure (i.e., a first limiting structure 51 and a second limiting structure 52), wherein the first limiting structure 51 is connected to the second guiding structure 12, and is used to limit the movement of the second guiding structure 12 along the first guiding direction; the second limiting structure 52 is connected to the first guiding structure 11, and is used to limit the movement of the first guiding structure 11 along the second guiding direction.

[0041] As an optional implementation, the guide structure in the embodiment of the present application can be implemented by structures such as linear guide rails or slide rails. For example, a positioning rail can be used as the above-mentioned guide structure, wherein the first guide structure 11 can be a longitudinal positioning rail, and the first guiding direction of the first guide structure 11 is the longitudinal direction, and the second guide structure 12 can be a transverse positioning rail, and the second guiding direction of the second guide structure 12 is the transverse direction.

[0042] Specific as Figure 2 As shown, the plane where the transverse positioning track and the longitudinal positioning track are located is parallel to the placement plane where the battery cell pole piece 61 is placed in the platform 41, and is located above the placement plane;

[0043] Correspondingly, the above-mentioned limiting structure can be implemented by a limiting rail, the track shape of the limiting rail is consistent with the outline of the platform 41, wherein the first limiting structure 51 can be a longitudinal limiting rail, and the second limiting structure 52 can be a transverse limiting rail, and the two ends of the longitudinal positioning rail are arranged in the track groove of the transverse limiting rail for transverse parallel movement along the transverse limiting rail; the two ends of the transverse positioning rail are arranged in the track groove of the longitudinal limiting rail for longitudinal parallel movement along the longitudinal limiting rail.

[0044] In an embodiment of the present application, a limit groove can be set in the limit track, and a limit end (such as a slider, roller, etc.) that can move along the limit groove can be installed in the limit groove. By connecting the two ends of the device positioning track with the limit end, the effect of controlling the device positioning track to move along the positioning limit track by driving the motor can be achieved.

[0045] In some embodiments of the present application, the battery cell identification device 21 can be installed at the intersection between the transverse positioning track and the longitudinal positioning track. The battery cell identification device 21 moves laterally with the lateral movement of the longitudinal positioning track, and moves longitudinally with the longitudinal movement of the transverse positioning track. Through the movement of the longitudinal positioning track and the transverse positioning track, all pole pieces are scanned and identified by a scanning device, and the interface parameters of each position on the surface of the pole piece are measured and recorded.

[0046] In the embodiment of the present application, the above-mentioned limiting track can also be connected to the platform 41 through the supporting structure 31 (such as a track bracket). It should be noted that Figure 2 In the structure shown in FIG. , the limiting track and the positioning track are arranged on the same plane, but the embodiment of the present application is not limited to this. For example, the positioning limiting track can also be arranged around the fixed platform. Figure 3 As shown, Figure 2 and Figure 3 The top views of the structures shown are Figure 4 As shown, Figure 3 The specific principle of the structure shown is Figure 2 The structures shown are the same and will not be described again.

[0047] The following is a further introduction to the usage process of the above structure.

[0048] First, the cell pole pieces in the lithium-ion battery are divided into several sections and laid flat on the placement plane of the platform. The cell pole pieces are laid flat with a cell pole piece fixing device to ensure that the pole pieces are free of wrinkles, overlaps and other abnormal conditions. Then, the cell identification device is started. The cell identification device starts scanning from the outermost circle of pole pieces driven by a guide structure (such as a positioning track), wherein the longitudinal direction of the center point of the scanning area of ​​the cell identification device coincides with the center point of the width direction of the first section of the pole piece, thereby ensuring that the scanning area can face the pole piece area; when scanning the first section of the pole piece, the second guide structure (such as a transverse positioning track) of the scanning device does not move, and the first guide structure (such as a longitudinal positioning track) moves transversely along the second limiting structure (such as a transverse limiting track) to realize scanning and identification of the first section of the pole piece; then, the second guide structure (such as a transverse positioning track) moves longitudinally along the first limiting structure (such as a longitudinal limiting track) to the longitudinal position where the second section of the pole piece is located, and the above scanning process is repeated until all the pole pieces on the placement platform are scanned.

[0049] After the cell identification device scans and identifies the A side of all pole pieces through the movement of the guide structure (such as the longitudinal positioning rail and the transverse positioning rail), the pole piece needs to be flipped to the B side and scanned and identified in the same way, and the interface parameters of the B side are measured and recorded.

[0050] In the embodiment of the present application, the battery cell identification device can measure and record interface parameters such as chromaticity, relative color difference, geometric size parameters, etc. of each position area on the surface of each pole piece.

[0051] Compared with the identification method in the related art that is closely related to the operator's subjective judgment and may have missed judgments or misjudgments, the embodiment of the present application uses the above-mentioned structure to lay out the core pole pieces, and then the machine scans and identifies the battery cell interface along a preset track, which can ensure a high degree of consistency in the identification standards, and has good repeatability of multiple measurements, thereby improving the identification efficiency, facilitating operation, and preventing problems such as missed judgments and misjudgments.

[0052] According to an embodiment of the present application, an embodiment of a battery cell pole piece detection system is also provided. Figure 5 is a schematic diagram of a top view of a battery cell electrode detection system provided according to an embodiment of the present application. Figure 5 As shown, the system includes: a battery cell electrode detection device and a processing device (processing system 71).

[0053] The battery cell electrode detection device includes: a first guide structure 11; a second guide structure 12, which is installed on the first guide structure 11 and can move along the first guide direction of the first guide structure 11; a battery cell identification device 21, which is installed on the second guide structure 12 and can move along the second guide direction of the second guide structure 12, and is used to scan and identify the interface parameters of each position of the battery cell electrode; wherein the first guide direction intersects with the second guide direction;

[0054] The processing device (processing system 71 ) is connected to the battery cell identification device via a communication link, and is used to obtain interface parameters scanned by the battery cell identification device 21 , wherein the interface parameters include: chromaticity.

[0055] Through the above steps, the movement of the first guide structure and the second guide structure is used to control the movement of the battery cell identification device, so as to achieve the purpose of automatically scanning and identifying each position area of ​​the battery cell electrode piece in turn by the battery cell identification device, thereby solving the technical problems of low detection efficiency, easy missed detection and false detection caused by manual judgment when detecting the interface state of the battery cell electrode piece in the related technology.

[0056] The following is an example of the present application Figure 5 The battery cell electrode detection system shown in is further introduced.

[0057] The cell electrode piece detection device of the cell electrode piece detection system also includes a platform for placing the cell electrode piece, the structure of which is as follows: Figure 6 As shown, it includes: a platform 41 for placing the battery cell pole piece 61, and a battery cell pole piece fixing device 42, wherein the battery cell pole piece fixing device 42 is arranged at the edge of the platform 41, and is used to fix the battery cell pole piece 61 on the platform 41 so that the battery cell pole piece 61 can be spread out flat.

[0058] In order to make the length of the battery cell electrode sheet adapt to the working surface (placing plane) of the platform 41, in the embodiment of the present application, the length of the placement plane of the platform 41 in the first guide direction can be set to be consistent with the unfolded length of the battery cell electrode sheet, and the placement direction of the battery cell electrode sheet can be set to be parallel to the first guide direction; or the length of the placement plane of the platform 41 in the second guide direction can be set to be consistent with the unfolded length of the battery cell electrode sheet, and the placement direction of the battery cell electrode sheet can be set to be parallel to the second guide direction, so that the battery cell electrode sheets are flattened into one or more sections on the platform.

[0059] As a match, in the embodiment of the present application, a fixing device and a guide structure (i.e., a first guide structure 11 and a second guide structure 12) of the battery cell identification device 21 are provided above the platform 41 to support the mobile scanning of the battery cell identification device 21, wherein the setting of the guide structure needs to enable the battery cell identification device 21 to scan the complete electrode area, and the battery cell identification device 21 needs to be placed vertically to be able to vertically collect the state of the electrode area;

[0060] In order to limit the guiding direction of the guiding structure, the battery cell pole piece detection device in the embodiment of the present application also includes a limiting structure (i.e., a first limiting structure 51 and a second limiting structure 52), wherein the first limiting structure 51 is connected to the second guiding structure 12, and is used to limit the movement of the second guiding structure 12 along the first guiding direction; the second limiting structure 52 is connected to the first guiding structure 11, and is used to limit the movement of the first guiding structure 11 along the second guiding direction.

[0061] As an optional implementation, the guide structure in the embodiment of the present application can be implemented by structures such as linear guide rails or slide rails. For example, a positioning rail can be used as the above-mentioned guide structure, wherein the first guide structure 11 can be a longitudinal positioning rail, and the first guiding direction of the first guide structure 11 is the longitudinal direction, and the second guide structure 12 can be a transverse positioning rail, and the second guiding direction of the second guide structure 12 is the transverse direction.

[0062] Correspondingly, the above-mentioned limiting structure can be implemented by a limiting rail, the track shape of the limiting rail is consistent with the outline of the platform 41, wherein the first limiting structure 51 can be a longitudinal limiting rail, and the second limiting structure 52 can be a transverse limiting rail, and the two ends of the longitudinal positioning rail are arranged in the track groove of the transverse limiting rail for transverse parallel movement along the transverse limiting rail; the two ends of the transverse positioning rail are arranged in the track groove of the longitudinal limiting rail for longitudinal parallel movement along the longitudinal limiting rail.

[0063] The battery cell identification device 21 can be installed at the intersection between the transverse positioning track and the longitudinal positioning track. The battery cell identification device 21 moves laterally with the transverse movement of the longitudinal positioning track, and moves longitudinally with the longitudinal movement of the transverse positioning track. Through the movement of the longitudinal positioning track and the transverse positioning track, all pole pieces are scanned and identified by a scanning device, and the interface parameters of each position on the surface of the pole piece are measured and recorded, wherein the interface parameters include but are not limited to: chromaticity, relative color difference, geometric dimension parameters, etc. The interface parameters of each position (such as each pixel point) on the surface of the battery cell pole piece can be obtained through the identification device.

[0064] The following is a further introduction to the usage process of the above structure.

[0065] First, the cell pole pieces in the lithium-ion battery are divided into several sections and laid flat on the placement plane of the platform. The cell pole pieces are laid flat with a cell pole piece fixing device to ensure that the pole pieces are free of wrinkles, overlaps and other abnormal conditions. Then, the cell identification device is started. The cell identification device starts scanning from the outermost circle of pole pieces driven by a guide structure (such as a positioning track), wherein the longitudinal direction of the center point of the scanning area of ​​the cell identification device coincides with the center point of the width direction of the first section of the pole piece, thereby ensuring that the scanning area can face the pole piece area; when scanning the first section of the pole piece, the second guide structure (such as a transverse positioning track) of the scanning device does not move, and the first guide structure (such as a longitudinal positioning track) moves transversely along the second limiting structure (such as a transverse limiting track) to realize scanning and identification of the first section of the pole piece; then, the second guide structure (such as a transverse positioning track) moves longitudinally along the first limiting structure (such as a longitudinal limiting track) to the longitudinal position where the second section of the pole piece is located, and the above scanning process is repeated until all the pole pieces on the placement platform are scanned.

[0066] After the cell identification device scans and identifies the A side of all pole pieces through the movement of the guide structure (such as the longitudinal positioning rail and the transverse positioning rail), the pole piece needs to be flipped to the B side and scanned and identified in the same way, and the interface parameters of the B side are measured and recorded.

[0067] In the embodiment of the present application, the identification device can measure and record interface parameters such as chromaticity, relative color difference, geometric size parameters, etc. of each position area on the surface of each pole piece.

[0068] It should be noted that the cell electrode piece detection device in the cell electrode piece detection system in this embodiment is Figures 1 to 4 Therefore, for the above-mentioned device corresponding to the structure Figures 1 to 4 The relevant explanations and descriptions of the structure in the figure are also applicable to the embodiments of the present application and will not be repeated here.

[0069] The processing equipment (processing system) in the battery cell electrode detection system is further introduced below.

[0070] In an embodiment of the present application, the processing device can be connected to the battery cell identification device through a wired or wireless connection. After the processing device obtains the interface parameters of each position (such as each pixel point) on the surface of the battery cell electrode detected by the battery cell identification device, the acquired data can be analyzed and processed.

[0071] Specifically, the processing equipment can classify different interface conditions according to the interval of chromaticity, wherein the area where chromaticity satisfies d~d+u is recorded as a normal area, the area where chromaticity satisfies a~a+x is recorded as a black spot area, the area where chromaticity satisfies b~b+y is recorded as a purple spot area, and the area where chromaticity satisfies c~c+z is recorded as a lithium precipitation area; the average chromaticity of the normal area is recorded as the reference chromaticity, and the relative chromaticity of each abnormal area is further screened, and the area where the color difference standard satisfies e~e+l is determined to be identified as a black spot area, the area where the color difference standard satisfies f~f+m is determined to be identified as a purple spot area, and the area where the color difference standard satisfies g~g+n is determined to be identified as a lithium precipitation area, wherein the chromaticity ranges corresponding to each phenomenon have no overlapping areas;

[0072] In addition, the processing equipment in the embodiment of the present application can also perform contour area measurement for the area of ​​the same abnormal phenomenon. For example, the contour area of ​​the irregular abnormal area can be measured by integration, pixels, etc. Compared with the method of directly measuring the area by length and width approximating a rectangle, or multi-segment division and segmented measurement in the related art, the measurement accuracy is higher and more accurate. At the same time, the area measurement in the normal area uses the contour area of ​​the normal pole piece chromaticity area as the total area of ​​the pole piece area, while the related art uses the method of directly measuring the area by the length and width of the pole piece design parameters. The area is the design area, not the actual area, and the size ratio of the inactive area is not considered, which leads to misjudgment in the judgment of the percentage limit of the abnormal area.

[0073] Specifically, the processing equipment counts the area of ​​each area, the contour area of ​​the normal area S1, the total area of ​​the black spot area S2, the total area of ​​the purple spot area S3, and the total area of ​​the lithium precipitation area S4; records the relative position of each abnormal area, such as the coordinate point set A of area one, the coordinate point set B of area two, etc., calculates the straight-line distance L1 between each black spot area and the nearest lithium precipitation area, and calculates the straight-line distance L2 between each purple spot area and the nearest lithium precipitation area;

[0074] Afterwards, the collected data is analyzed and judged. First, determine whether S2, S3, and S4 meet the limit standard requirements; then determine whether S2 / S1, S3 / S1, and S4 / S1 meet the limit standard requirements; finally, determine whether all L1s meet the limit standard requirements, and whether all L2s meet the limit standard requirements; for single abnormal areas that do not meet the L1 and L2 limit requirements, image records are made.

[0075] In the embodiment of the present application, the processing system can also transmit the processing results to the display device (display system 81) so that the operator can intuitively obtain the results from the display system, including: whether abnormal phenomena such as black spots, purple spots, lithium precipitation, etc. meet the corresponding interface requirements, and the specific morphology and records of the interface that does not meet the corresponding requirements, as follows.

[0076] In some embodiments of the present application, the battery cell pole piece detection system also includes: a display device (display system 81), wherein the display device can be connected to the processing device via a wired or wireless connection, and is used to display abnormal areas in the battery cell pole pieces determined by the processing device, wherein the abnormal areas include: black spot areas, purple spot areas, and lithium deposition areas, and different abnormal areas correspond to different chromaticity intervals.

[0077] The present application adopts color difference and other identification parameters, defines different abnormal phenomena through different color differences, chromaticity ranges, etc., characterizes the abnormal phenomena of the electrode, solidifies the judgment standard of the abnormal phenomena, makes the results of judging the battery cell interface more consistent, and has good repeatability of multiple measurements, can improve work efficiency, and is easy to operate; it can improve the accuracy of judgment, ensure the accuracy of judgment results, and the results of repeated judgments have good reproducibility, and the judgment of the machine equipment will not miss or misjudge the abnormal interface.

[0078] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0079] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0080] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0081] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0082] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0083] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0084] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A battery cell electrode detection device, characterized in that: include: A first guide structure; a second guide structure, mounted on the first guide structure and movable along a first guide direction of the first guide structure; A battery cell identification device, mounted on the second guide structure, movable along the second guide direction of the second guide structure, and used for scanning and identifying interface parameters of various positions of the battery cell electrode; Wherein, the first guiding direction intersects with the second guiding direction.

2. The battery cell electrode detection device according to claim 1, characterized in that: The device also includes: A supporting structure is used to support the first guiding structure.

3. The battery cell electrode detection device according to claim 1, characterized in that: The device also includes: A platform, used for carrying the battery cell pole piece; A battery cell pole piece fixing device is arranged on the platform and is used for fixing the battery cell pole piece on the platform.

4. The battery cell electrode detection device according to claim 3, characterized in that: The arrangement direction of the battery cell pole piece is parallel to the first guiding direction, or the arrangement direction of the battery cell pole piece is parallel to the second guiding direction.

5. The battery cell electrode piece detection device according to claim 4, characterized in that: The length of the placement plane of the platform in the first guide direction is consistent with the unfolded length of the battery cell electrode piece, or the length of the placement plane of the platform in the second guide direction is consistent with the unfolded length of the battery cell electrode piece.

6. The battery cell electrode detection device according to claim 1, characterized in that: The device also includes: a first limiting structure, connected to the second guiding structure, and used to limit the movement of the second guiding structure along the first guiding direction; The second limiting structure is connected to the first guiding structure, and is used to limit the movement of the first guiding structure along the second guiding direction.

7. The battery cell electrode piece detection device according to claim 6, characterized in that: The first guide structure is a longitudinal positioning track, the first guide direction of the first guide structure is a longitudinal direction, the second guide structure is a transverse positioning track, the second guide direction of the second guide structure is a transverse direction, The battery cell identification device is installed at the intersection of the transverse positioning track and the longitudinal positioning track, and moves transversely with the transverse movement of the longitudinal positioning track, and moves longitudinally with the longitudinal movement of the transverse positioning track.

8. The battery cell electrode piece detection device according to claim 7, characterized in that: The first limiting structure is a longitudinal limiting track, and the second limiting structure is a transverse limiting track. Both ends of the transverse positioning track are arranged in the track grooves of the longitudinal limiting track, and are used for longitudinal movement along the longitudinal limiting track; Both ends of the longitudinal positioning track are arranged in the track grooves of the transverse limiting track for transverse movement along the transverse limiting track.

9. A battery cell electrode detection system, characterized in that: include: Battery cell pole piece detection device and processing equipment, wherein: The battery cell pole piece detection device comprises: a first guide structure; a second guide structure, mounted on the first guide structure, and movable along a first guide direction of the first guide structure; a battery cell identification device, mounted on the second guide structure, and movable along a second guide direction of the second guide structure, for scanning and identifying interface parameters of various positions of the battery cell pole piece; wherein the first guide direction intersects with the second guide direction; The processing device is connected to the battery cell identification device via a communication link, and is used to obtain the interface parameters scanned by the battery cell identification device, wherein the interface parameters include: chromaticity.

10. The battery cell electrode detection system according to claim 9, characterized in that: The battery cell electrode detection system also includes: a display device, wherein: The display device is connected to the processing device, and is used to display the abnormal area in the battery cell electrode determined by the processing device, wherein the abnormal area includes: a black spot area, a purple spot area, and a lithium deposition area, and different abnormal areas correspond to different chromaticity intervals.

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