Battery piece detection device

Abstract

The utility model discloses a battery piece detection device. The battery piece detection device comprises a first conveying module, an eddy current detection module and a material distribution module, the first conveying module is used for conveying at least one battery piece with a metal layer on the surface; the eddy current detection module is arranged above the first conveying module and is used for carrying out crack detection on the battery piece; and the material distribution modules are arranged above the first conveying module at intervals, are positioned at the downstream of the eddy current detection module, and are used for carrying out material distribution treatment on the battery pieces detected by the eddy current detection module so as to remove the battery pieces with crack defects from the first conveying module. According to the battery piece detection device provided by the utility model, a battery piece with a metal layer is comprehensively detected by utilizing an eddy current induction principle so as to detect whether the battery piece has a crack defect or not.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, in particular to a cell sheet detection device. Background Art

[0002] The process flow involved in the preparation of metal electrodes for battery cells is as follows: metal seed layer deposition, mask layer coating, exposure and development, metal electrode process, film stripping and etching (removing the mask layer and etching the excess metal seed layer). Battery cells are prone to defects such as cracks when depositing the metal seed layer, or in the previous intermediate battery cell preparation, or in the transportation process. Large cracks can be seen directly with the naked eye and removed, but hidden cracks in battery cells are difficult to observe directly with the naked eye.

[0003] At present, the methods for detecting defects such as cracks in conventional process flows include performing optical detection such as EL (electroluminescence) or PL (photoluminescence) before preparing the metal seed layer, or in the film stripping and etching step, in order to detect large crack defects in the cell, or performing online or offline sampling during the electrode preparation process. Because a metal seed layer needs to be deposited on the surface of the cell, if the cell has a large crack defect, the metal seed layer may fill the crack area, or the corresponding area of ​​the metal seed layer has the same damaged crack, making the seed layer thickness at the crack different from other areas. If the cell has hidden cracks, it is difficult for conventional optical means to detect all defects in the cell through the metal seed layer, and sampling will also affect the cell processing process. Utility Model Content

[0004] The utility model provides a battery cell detection device to solve the problem in the prior art that the defects of the battery cell cannot be detected through the metal layer.

[0005] According to one aspect of the utility model, a battery cell detection device is provided, comprising a first conveying module, an eddy current detection module and a material distribution module;

[0006] The first conveying module is used to convey a battery sheet having a metal layer on at least one surface;

[0007] The eddy current detection module is arranged above the first conveying module, and is used to perform defect detection on the battery cells conveyed on the first conveying module; the sorting module is arranged at intervals above the first conveying module and is located downstream of the eddy current detection module, and is used to sort the battery cells detected by the eddy current detection module so as to remove defective battery cells from the first conveying module.

[0008] Optionally, the eddy current detection module includes a first eddy current detection component and / or a second eddy current detection component. The first eddy current detection component is arranged above the first conveying module for performing defect detection on the upper surface of the battery cell. The second eddy current detection component is arranged below the first conveying module for performing defect detection on the lower surface of the battery cell. The working ends of the first eddy current detection component and the second eddy current detection component are arranged relative to each other.

[0009] Optionally, when the eddy current detection module only has the first eddy current detection component or the second eddy current detection component, the eddy current detection module also includes a flipping module, which is arranged next to the first conveying module and is used to flip the battery cell on which the upper surface defect detection on the first conveying module has been completed.

[0010] Optionally, the material distribution module includes a track, a slide, a slide driving component and a telescopic component with adsorption holes at the working end. The slide is movably installed on the track and is drivingly connected to the slide driving component. The slide driving component is used to drive the slide to move along the track. The telescopic component is installed in the slide. When the telescopic component is extended, the working end of the telescopic component is close to the first conveying module. When it is retracted, the working end of the telescopic component is away from the first conveying module.

[0011] Optionally, the track is an annular track, at least one of the slide and the telescopic assembly is provided, and the slide and the telescopic assembly are arranged in one-to-one correspondence, each of the slides is movably arranged on the annular track, and the number of the slide driving components is the same as the number of the slides, each of the slide driving components drives and connects to a slide, and the sliding paths of the slides together enclose a ring structure.

[0012] Optionally, the circular track includes at least one starting station, the number of the starting stations is the same as the number of the slides, and one slide is corresponding to each starting station. Each slide switches positions between the starting stations in turn on the circular track, and the telescopic components on each slide extend when approaching the first conveying module and retract when moving away from the first conveying module.

[0013] Optionally, a plurality of starting stations are formed at intervals on the circular track, and the number of the starting stations is the same as the number of the slides. A slide is provided corresponding to each starting station, and each slide switches positions between the starting stations in turn on the circular track. The telescopic components on each slide extend when approaching the first conveying module and retract when moving away from the first conveying module in turn.

[0014] Optionally, the material distribution module further includes a second conveying module, which is arranged side by side and in parallel with the first conveying module, and the annular track spans the first conveying module and the second conveying module.

[0015] Optionally, the battery cell detection device also includes a cleaning module, which is arranged above the first conveying module and upstream of the eddy current detection module, and is used to clean the surface of the battery cell before the battery cell detection. The cleaning module includes a blowing assembly, a second lifting module and a second bracket, the lower end of the second lifting module is connected to the blowing assembly, and the upper end of the second lifting module is connected to the second bracket, the second bracket is used to fix the upper end of the second lifting module, the blowing module is used to blow air to the battery cell, and the second lifting module is used to adjust the distance between the blowing assembly and the first conveying module.

[0016] Optionally, the battery cell detection device also includes a dust removal module, which is arranged above the first conveying module and downstream of the eddy current detection module. The dust removal module is used to remove dust from defective battery cells. The dust removal module includes an ion fan assembly, a third lifting module and a third bracket. The lower end of the third lifting module is connected to the ion fan assembly, and the upper end of the third lifting module is connected to the third bracket. The third bracket is used to fix the upper end of the third lifting module. The ion fan assembly is used to remove dust and static electricity from defective battery cells. The third lifting module is used to adjust the distance between the ion fan assembly and the first conveying module.

[0017] Optionally, the battery cell detection device further comprises a correction component, which is disposed beside the first conveying module and is used to correct the position of the battery cell before detection.

[0018] The technical solution of the embodiment of the utility model provides a battery cell detection device, including a first conveying module, an eddy current detection module and a material separation module; the first conveying module is used to transfer battery cells; the eddy current detection module is arranged above the first conveying module, and the eddy current detection module is used to detect defects on the battery cells; the material separation module is arranged above the first conveying module at intervals, and is located downstream of the eddy current detection module, and is used to separate the battery cells detected by the eddy current detection module, so as to directly remove the defective battery cells with cracks from above the first conveying module. The battery cell detection device uses the eddy current induction principle to perform a comprehensive detection on the battery cells, and can effectively identify the defects of the battery cells, such as ruptures, hidden cracks, etc., through the changes in the induced current of the metal layer. At the same time, the cross-section of the sensing area of ​​the eddy current detection module is not less than the area of ​​the battery cell, which can ensure the detection of the edge crack defects of the battery cell, and solves the problem that the rupture of the battery cell cannot be detected through the metal layer in the prior art; at the same time, the defective battery cells can be directly removed directly above the first conveying module.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural schematic diagram of a battery cell detection device provided by an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of a control module of a battery cell detection device provided by an embodiment of the utility model;

[0023] Figure 3 It is a side view of the inside of the eddy current detection module provided by the embodiment of the utility model;

[0024] Figure 4 It is a bottom view of the eddy current detection module provided by the embodiment of the utility model;

[0025] Figure 5 It is a bottom view of the material distribution module provided by the embodiment of the utility model;

[0026] Figure 6 It is a side view of the material distribution module provided by the embodiment of the utility model.

[0027] Description of Figure Numbers:

[0028] 110, first conveying module; 120, eddy current detection module; 121, first eddy current detection assembly; 122 second eddy current detection assembly; 123, flip robot arm; 124, flip assembly; 125, detection box; 126, probe; 127, first lifting module; 130, control module; 330, second conveying module; 340, material distribution module; 341, circular track; 342, slide; 343, telescopic assembly; 344, adsorption hole; 345, slide driving component; 346, first bracket; 351, blowing assembly; 352, second lifting module; 353, second bracket; 361, ion fan assembly; 362; third lifting module; 363, third bracket; 370, alignment assembly. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] The utility model provides a battery cell detection device. Figure 1 is a schematic diagram of the structure of a battery cell detection device provided by an embodiment of the utility model, such as Figure 1As shown, the cell detection device includes a first conveying module 110, an eddy current detection module 120 and a material separation module 340; the first conveying module 110 is used to transport horizontally placed cells, the cells include two upper and lower surfaces opposite to each other, and at least one surface of the transported cells has a metal layer; the eddy current detection module 120 is arranged above the first conveying module 110, and the eddy current detection module 120 is used to perform defect detection on the cells transported on the first conveying module 110, and the spatial area of ​​the eddy current detection module 120 facing the cell is its sensing area, and when performing defect detection, the sensing area covers part or all of the cells; the material separation module 340 is arranged above the first conveying module 110 at intervals and is located downstream of the eddy current detection module 120, and is used to perform material separation on the cells detected by the eddy current detection module 120, so as to remove defective cells from the first conveying module 110. The cell defects detected in this embodiment are crack defects, including large cracks and hidden cracks, which are not easy to be seen by naked eyes.

[0032] Figure 2 Schematic diagram of a control module of a battery cell detection device provided by an embodiment of the utility model. Figure 2 As shown, the battery cell detection device of this embodiment also includes a control module 130, and the control module 130 is communicatively connected with the eddy current detection module 120 and the material sorting module 340. The control module 130 is used to receive the detection signal output by the eddy current sensing module 120 when the battery cell is located in the sensing area of ​​the eddy current detection module 120, so as to determine the defective battery cell that needs to be discarded, and output the control signal after processing the detection signal and transmit it to the material sorting module 340 to discard the defective battery cell.

[0033] It should be noted that when the battery cell is a single-sided battery cell, any surface of the battery cell has a metal layer, that is, the upper surface of the battery cell has a metal layer, or the lower surface of the battery cell has a metal layer; when the battery cell is a double-sided battery cell, the upper and lower surfaces of the battery cell have metal layers. In this embodiment, the metal layer is a metal seed layer when the metal electrode is prepared for the battery cell. The metal type of the specific metal layer can be set according to actual needs and is not limited here.

[0034] In this embodiment, the first conveying module 110 is a module for conveying battery cells, for example, the first conveying module includes a conveyor belt, and the eddy current detection module 120 is a module for detecting defects of battery cells using the eddy current induction principle, for example, including an eddy current sensor, wherein the induction area of ​​the eddy current detection module 120 is an area where the battery cell can generate eddy current induction. The control module 130 is a module for receiving, processing and transmitting signals, for example, the control module 130 includes a microprocessor. The material separation module 340 is a module for removing defective battery cells according to the control signal.

[0035] In this embodiment, when the battery cell detection device performs defect detection on the battery cell, the first conveying module 110 conveys the battery cell to the induction area of ​​the eddy current detection module 120, and the eddy current detection module 120 performs defect detection on the battery cell. At this time, the induction area of ​​the eddy current detection module 120 generates an eddy current magnetic field signal, and the metal layer on the surface of the battery cell generates an induced current. The induced current generated by the battery cell without defects is a regular and stable signal, that is, the detection signal output by the eddy current detection module 120 is a normal signal. The defective battery cell will cause damage inside the metal layer, thereby generating an irregular current signal, that is, the detection signal output by the eddy current detection module 120 is a defect signal. The control module 130 processes the received normal signal or defect signal and transmits it to the material separation module 340 to remove the battery cell detected as a defect signal from above the first conveying module 110.

[0036] The battery cell detection device of this embodiment uses the eddy current induction principle to perform comprehensive detection on battery cells with metal layers. The changes in the induced current of the metal layer can effectively identify crack defects in the battery cell, and can ensure the detection of crack defects at the edge of the battery cell, solving the problem in the prior art that battery cell rupture cannot be detected through the metal layer.

[0037] Figure 3 FIG. 1 is a side view of the inside of the eddy current detection module 120 provided in an embodiment of the present utility model. Figure 3 As shown, the embodiment of the utility model provides a specific eddy current detection module 120, which can perform crack defect detection on single-sided battery cells, and can also perform crack defect detection on double-sided battery cells. When the battery cell is a single-sided battery cell, the eddy current detection module 120 includes a first eddy current detection component 121 or a second eddy current detection component 122. The first eddy current detection component 121 is arranged above the first conveying module 110, and is used to perform crack defect detection on the upper surface of the battery cell. The second eddy current detection component 122 is arranged below the first conveying module 110, and is used to perform crack defect detection on the lower surface of the battery cell; when the battery cell is a double-sided battery cell, the eddy current detection module 120 also includes a first eddy current detection component 121 and a second eddy current detection component 122. The working ends of the first eddy current detection component 121 and the second eddy current detection component 122 are arranged relatively to each other, and crack defect detection is performed on the upper and lower surfaces of the battery cell at the same time. The area in the first conveying module 110 for carrying the battery cells is preferably made of insulating material, or when performing defect detection, insulating components are used to lift up the battery cells to prevent metal components in the first conveying module 110 from affecting the detection effect of defect detection.

[0038] Most of the existing battery cells are double-sided battery cells. In the present embodiment, when the eddy current detection module is only provided with one eddy current detection component, that is, only the first eddy current detection component 121 or the second eddy current detection component 122 is provided, the eddy current detection is performed on the metal layers on both surfaces of the battery cell at the same time by increasing its power. In this way, it is impossible to specifically determine which side of the battery cell has the crack defect, so that it is impossible to timely determine which previous process has a problem and repair it in time.

[0039] To solve this problem, in one example, the power of the first eddy current detection component 121 or the second eddy current detection component 122 is set within a range that can only detect one metal layer, and the eddy current detection module 120 also includes a flip module, which is set to the side of the transmission direction of the first conveying module 110, and is used to flip a battery cell on the first conveying module 110 that has completed the surface crack defect detection, so as to detect the metal layers on both surfaces of the battery cell. Specifically, the flip module includes a flip robot 123 and a flip assembly 124, the flip robot 123 is used to transfer the battery cell from the first conveying module 110 to the flip assembly 124, and the flip assembly 124 is used to flip the battery cell 180° and re-place it on the first conveying module 110.

[0040] In another example, if Figure 3 As shown, eddy current detection components can be set on the upper and lower surfaces of the battery cell at the same time, that is, the first eddy current detection component 121 and the second eddy current detection component 122 are both set with preset appropriate powers, and the two metal layers of the battery cell are detected at the same time, so as to determine which side of the battery cell has a crack defect, and then determine which previous process has a problem, and repair it in time.

[0041] In one example of this embodiment, Figure 1 and Figure 3 As shown, the eddy current detection module 120 also includes a detection box 125, the first conveying module 110 passes through the detection box 125, the first eddy current detection component 121 is arranged at the inner top of the detection box 125, and the second eddy current detection component 122 is arranged at the inner bottom of the detection box 125 to avoid interference of the signal during the detection process. In an example of this embodiment, as Figure 3As shown, the eddy current detection module 120 also includes a first lifting module 127, one end of the first lifting module 127 is connected to the first eddy current detection component 121, and the other end of the first lifting module 127 is connected to the detection box 125. The first lifting module 127 is used to adjust the distance between the first eddy current detection component 121 and the first conveying module 110. In this embodiment, the first lifting module 127 is a module for lifting and lowering the first eddy current detection component. For example, the first lifting module 127 includes a driving linkage mechanism and a lifting linkage mechanism, and the detection box 125 has a fixing effect on the fixed end of the first lifting module 127. When the battery cell is located in the induction area of ​​the first eddy current detection component 121, the induced current generated by the battery cell is related to the internal structure. The first lifting module 127 group can not only be suitable for the detection of different types of battery cells by adjusting the distance between the first eddy current detection module 121 and the first conveying module 110, but also provide sufficient space for flipping the battery cell.

[0042] Figure 4 is a bottom view of the eddy current detection assembly provided by the embodiment of the utility model. Preferably, the first eddy current detection assembly 121 and the second eddy current detection assembly 122 have the same structure. Figure 4 As shown, the eddy current detection assembly includes a probe 126. When the battery cell is located in its sensing area, the spatial sensing area formed by the working end of the probe 126 completely covers the battery cell. In this embodiment, the eddy current detection assembly includes a plurality of probes 126. For example, the plurality of probes 126 are arranged in a matrix. The number of probes 126 at the edge of the spatial sensing area formed by the working ends of the probes 126 is relatively large. The high-density distribution of the probes 126 corresponding to the edge of the sensing area can improve the accuracy of detecting hidden crack defects at the edge of the battery cell.

[0043] Figure 5 3 is a bottom view of the material distribution module 340 provided in the embodiment of the utility model. Figure 6 is a side view of the material distribution module 340 provided in the embodiment of the utility model, as shown Figures 5 and 6 As shown, the material distribution module 340 includes a track, a slide 342, and a telescopic component 343 with an adsorption hole 344 at the working end. The slide 342 is movably mounted on the track. When the telescopic component 343 is extended, the working end of the telescopic component 343 is close to the first conveying module 110, and when it is retracted, the working end of the telescopic component 343 is away from the first conveying module 110. When the working end of the telescopic component is close to the first conveying module 110, the control module 130 is also used to control the adsorption hole 344 to adsorb the defective battery cell, so as to directly remove the defective battery cell from above the first conveying component 110. Specifically, the telescopic component 343 is an electric telescopic push rod.

[0044] Specifically, the material distribution module 340 further includes a slide drive component 345, which can be disposed in the slide 342 and is drivingly connected to the slide 342, and the slide drive component 345 is used to drive the slide 342 to move along the track. Preferably, the track is an annular track 341, and a plurality of slides 342 and telescopic components 343 are provided and the two are arranged one-to-one, and each slide 342 is movably arranged on the track, and the number of the slide drive components 345 is the same as the number of the slides 342, and each slide drive component 345 is drivingly connected to a slide 342, and the sliding paths of each slide 342 are enclosed together to form an annular structure.

[0045] A plurality of starting stations are formed at intervals on the circular track 341, and the number of the starting stations is the same as the number of the slides 342. A slide 342 is provided corresponding to each starting station, and each slide 342 switches positions among the starting stations in turn on the circular track 341. The telescopic components 343 on each slide 342 extend when approaching the first conveying module 110, and retract when away from the first conveying module 110. Preferably, a sensing component is also provided on each starting station, and when the latter slide 342 approaches the starting station where the former slide 342 is located, the former slide 342 senses the approach of the latter slide 342 through the sensing component, and moves to the next starting station in time, so that each slide 342 switches positions among the starting stations in turn on the circular track 341.

[0046] Continue to refer Figure 1 The battery cell detection device further includes a second conveying module 330, which is arranged parallel to the first conveying module 110, and a material separation module 340 is arranged above the first conveying module 110 and the second conveying module 330. The material separation module 340 is connected to the control module 130 for communication, and the control module 130 is also used to process the detection signal and output a control signal. The material separation module 340 is used to absorb the defective battery cell through the adsorption hole 344 according to the control signal, and drive the defective battery cell to the top of the second conveying module 330, and the second conveying module 330 is used to transport the defective battery cell. Preferably, the adsorption end of the telescopic component 343 is a plate surface, and a plurality of adsorption holes 344 are arranged on the plate surface to increase the adsorption area of ​​the defective battery cell to prevent it from falling due to insufficient adsorption force during the rejection process.

[0047] In this embodiment, the battery cell detection device further includes a first bracket 346, and the first bracket 346 is used to fix the upper end of the material separation module 340. The second conveying module 330 is a module for conveying defective battery cells, for example, the second conveying module 330 includes a conveyor belt. The material separation module 340 is a module for adsorbing defective battery cells, for example, the material separation module 340 includes an adsorption device. On the basis of the above embodiment, when the detection signal output by the eddy current detection module 120 is a normal signal, the control module 130 outputs a first control signal, and when the detection signal output by the eddy current detection module 120 is a defect signal, the control module 130 outputs a second control signal, and the material separation module 340 adsorbs the defective battery cell according to the second control signal, drives the defective battery cell to the top of the second conveying module 330, and then releases the defective battery cell. For example, a container can be placed on the second conveying module 330 for collecting defective battery cells, and the second conveying module 330 can also convey the defective battery cell to the unloading area, and directly unload the defective battery cell on the production line.

[0048] On the basis of the above embodiment, when the material distribution module 340 receives a control signal, the telescopic component 343 extends from the slide 342, and the adsorption hole 344 at the lower end of the telescopic component 343 first adsorbs the defective battery cell, and the telescopic component 343 retracts into the slide 342. The slide driving component 345 drives the slide 342 to move along the circular track 341 to the top of the second conveying module 330, and the telescopic component 343 extends from the slide 342. The adsorption hole at the lower end of the telescopic component 343 releases the defective battery cell to the second conveying module 330, and the second conveying module 330 collects or unloads the defective battery cell.

[0049] Continue to refer Figure 1 The battery cell detection device further includes a cleaning module, which is disposed above the first conveying module 110 at intervals, and is used to clean the battery cell before the battery cell detection.

[0050] In this embodiment, the cleaning module is a module for cleaning the battery cell. The cleaning module is located upstream of the eddy current detection module 120 and cleans the battery cell before detection to prevent impurities on the battery cell from affecting the detection result, thereby making the detection result of the battery cell more accurate.

[0051] Specifically, the cleaning module includes a blowing assembly 351, a second lifting module 352 and a second bracket 353. The lower end of the second lifting module 352 is connected to the blowing assembly 351, and the upper end of the second lifting module 352 is connected to the second bracket 353. The second bracket 353 is used to fix the upper end of the second lifting module 352. The blowing module 351 is used to blow air to the battery cells, and the second lifting module 352 is used to adjust the distance between the blowing assembly 351 and the first conveying module 110.

[0052] In this embodiment, the blowing assembly 351 removes impurities (metal layer residues) on the metal layer by blowing air on the surface of the metal layer of the battery cell to be tested. The second lifting module 352 is a module that performs lifting operations on the blowing assembly 351. For example, the second lifting module 352 includes a driving linkage mechanism and a lifting linkage mechanism. The second bracket 353 has a fixing function on the upper end of the second lifting module 352. The blowing assembly 351 is an air knife. The second lifting module 352 can effectively remove impurities on the metal layer by adjusting the distance between the blowing assembly 351 and the first conveying module 110.

[0053] For cleaning of double-sided battery cells, a flip module may be provided on the cleaning module to flip over the battery cell on one surface of the first conveying module 110 after cleaning, so as to clean both surfaces of the battery cell.

[0054] Continue to refer Figure 1 The battery cell inspection device further includes a de-impurity module, which is disposed above the first conveying module 110 at intervals. The de-impurity module is used to remove impurities from defect-free battery cells. The de-impurity module is located downstream of the eddy current inspection module 120. The de-impurity module removes impurities from defect-free battery cells after the inspection to prevent the inspection process from affecting the battery performance.

[0055] Specifically, the impurity removal module includes an ion fan assembly 361, a third lifting module 362 and a third bracket 363. The lower end of the third lifting module 362 is connected to the ion fan assembly 361, and the upper end of the third lifting module 362 is connected to the third bracket 363. The third bracket 363 is used to fix the upper end of the third lifting module 362. The ion fan assembly 361 is used to remove dust and static electricity from defective battery cells, and the third lifting module 362 is used to adjust the distance between the ion fan assembly 361 and the first conveying module 110.

[0056] In this embodiment, the ion fan assembly 361 includes an ion fan, which generates a large amount of negative ions to neutralize the positive ions in the air, thereby reducing charge accumulation and static electricity generation. The ion fan is connected to the bracket, and the working end of the ion fan is facing the metal layer of the battery cell to remove dust and static electricity from the battery cell after the detection.

[0057] Continue to refer Figure 1 The battery cell detection device further includes a correction component 370, which is disposed on the side of the first conveying module 110 and is used to correct the position of the battery cell before detection. The correction component 370 is disposed upstream of the cleaning module. The correction component 370 is disposed on both sides of the first conveying module 110 to correct the position of the battery cell to be detected, so that the battery cell to be detected can be fully covered by the sensing area of ​​the eddy current detection module 120, thereby achieving a more comprehensive detection of the battery cell.

[0058] In this embodiment, the battery cell detection device uses the eddy current induction principle to perform comprehensive detection on battery cells with at least one metal layer. The breakage of the battery cell can be effectively identified through the change of the induced current in the metal layer, which can ensure the detection of edge crack defects of the battery cell. In the process of defect detection of battery cells with metal layers, the cracks in the battery cell can be effectively identified, and the defective battery cells can be collected through the sorting module 340 or directly unloaded on the production line, which helps the production line to understand the equipment operation status in time, troubleshoot abnormalities, and improve the qualified rate of battery cells.

[0059] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A battery cell detection device, characterized in that: It includes a first conveying module, an eddy current detection module and a material distribution module; The first conveying module is used to convey a battery sheet having a metal layer on at least one surface; The eddy current detection module is arranged above the first conveying module, and is used to perform defect detection on the battery cells conveyed on the first conveying module; The sorting module is arranged above the first conveying module and downstream of the eddy current detection module. The sorting module is used to sort the battery cells detected by the eddy current detection module to remove defective battery cells from the first conveying module.

2. The battery cell detection device according to claim 1, characterized in that: The eddy current detection module includes a first eddy current detection component and / or a second eddy current detection component. The first eddy current detection component is arranged above the first conveying module for performing defect detection on the upper surface of the battery cell. The second eddy current detection component is arranged below the first conveying module for performing defect detection on the lower surface of the battery cell. The working ends of the first eddy current detection component and the second eddy current detection component are arranged opposite to each other.

3. The battery cell detection device according to claim 2, characterized in that: When the eddy current detection module is only provided with the first eddy current detection component or the second eddy current detection component, the eddy current detection module further comprises a flipping module, which is arranged beside the first conveying module and is used for flipping the battery cell on which the upper surface defect detection on the first conveying module is completed.

4. The battery cell detection device according to claim 1, characterized in that: The material distribution module includes a track, a slide, a slide driving component and a telescopic component with adsorption holes at the working end. The slide is movably installed on the track and is drivingly connected to the slide driving component. The slide driving component is used to drive the slide to move along the track. The telescopic component is installed in the slide. When the telescopic component is extended, the working end of the telescopic component is close to the first conveying module. When the telescopic component is contracted, the working end of the telescopic component is away from the first conveying module.

5. The battery cell detection device according to claim 4, characterized in that: The track is an annular track, at least one of the slide and the telescopic assembly is provided, and the slide and the telescopic assembly are arranged in a one-to-one correspondence, each of the slides is movably arranged on the annular track, and the number of the slide driving components is the same as the number of the slides, each of the slide driving components is driven and connected to a slide, and the sliding paths of the slides are jointly enclosed to form an annular structure.

6. The battery cell detection device according to claim 5, characterized in that: The circular track includes at least one starting station, the number of the starting stations is the same as the number of the slides, and each starting station is correspondingly provided with a slide. Each slide switches positions between the starting stations in turn on the circular track, and the telescopic components on each slide extend when approaching the first conveying module and retract when moving away from the first conveying module in turn.

7. The battery cell detection device according to claim 6, characterized in that: The material distribution module further includes a second conveying module, which is arranged side by side and in parallel with the first conveying module, and the annular track spans the first conveying module and the second conveying module.

8. The battery cell detection device according to claim 1, characterized in that: The battery cell detection device also includes a cleaning module, which is arranged at an interval above the first conveying module and upstream of the eddy current detection module. The cleaning module is used to clean the surface of the battery cell before the battery cell detection. The cleaning module includes a blowing assembly, a second lifting module and a second bracket. The lower end of the second lifting module is connected to the blowing assembly, and the upper end of the second lifting module is connected to the second bracket. The second bracket is used to fix the upper end of the second lifting module. The blowing module is used to blow air to the battery cell, and the second lifting module is used to adjust the distance between the blowing assembly and the first conveying module.

9. The battery cell detection device according to claim 1, characterized in that: The battery cell detection device also includes a dust removal module, which is arranged above the first conveying module and downstream of the eddy current detection module. The dust removal module is used to remove dust from defective battery cells. The dust removal module includes an ion fan assembly, a third lifting module and a third bracket. The lower end of the third lifting module is connected to the ion fan assembly, and the upper end of the third lifting module is connected to the third bracket. The third bracket is used to fix the upper end of the third lifting module. The ion fan assembly is used to remove dust and static electricity from defective battery cells. The third lifting module is used to adjust the distance between the ion fan assembly and the first conveying module.

10. The battery cell detection device according to claim 1, characterized in that: The battery cell detection device further includes a correction component, which is disposed beside the first conveying module and is used to correct the position of the battery cell before detection.

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