Conveying mechanism for battery piece subfissure detection and battery piece subfissure detection machine

Abstract

The utility model discloses a conveying mechanism used for the hidden crack detection of a battery piece and a battery piece hidden crack detection machine, the conveying mechanism comprises a conveying assembly, the conveying assembly comprises two conveying belts arranged at intervals and two groups of adsorption parts, each group of adsorption parts comprises a plurality of Bernoulli suckers, and the Bernoulli suckers are arranged on the conveying assembly. Each Bernoulli suction cup forms an adsorption area based on the Bernoulli effect on the corresponding conveying belt, each conveying belt is used for bearing a to-be-detected battery piece and conveying the borne to-be-detected battery piece to a detection station after the borne to-be-detected battery piece sequentially passes through the adsorption area of the corresponding Bernoulli suction cup, and a detection assembly is arranged behind the conveying assembly. The detection assembly is used for carrying out subfissure detection on the battery piece. According to the conveying mechanism for the subfissure detection of the battery piece, a non-contact adsorption Bernoulli suction cup and the conveying belt are matched, high-stability conveying of the battery piece to be detected is achieved, and the subfissure condition of the battery piece to be detected cannot be affected.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell testing technology, and in particular relates to a conveying mechanism and a battery cell microcrack detection machine for detecting microcracks in battery cells. Background Technology

[0002] As solar energy gradually becomes an important part of new energy sources, the quality and reliability of photovoltaic (PV) modules have received great attention. Microcracks are a problem discovered in recent years during the operation of PV power plants. Crystalline silicon modules, due to their inherently fragile crystal structure and the trend towards thinner crystalline silicon cells, are less resistant to mechanical damage and more prone to microcracks. Microcracks in modules reduce their efficiency, reliability, and lifespan, and even the stability of the entire PV system.

[0003] Research results indicate that 50% of failed solar cells originate from microcracks parallel to the main busbars. The efficiency loss from a 45° tilted crack is one-quarter that of a crack parallel to the main busbars. Furthermore, simulations of power loss from multiple defective cells within the module show that the failure area of ​​the cell significantly impacts power loss. Simulations of cell failure areas ranging from 5% to 50% reveal a significant increase in module power loss. However, simulations showing that increasing the number of microcracked cells only results in a slow increase in power loss. Therefore, studying the characteristics and impact of microcracks is of great significance for module production and operation.

[0004] Currently, when detecting microcracks in solar cells, a specific microcrack detection mechanism is usually used. Existing microcrack detection mechanisms are usually equipped with a conveyor to transport the solar cells to be tested. However, the existing conveyor can vibrate during the transport process, which can easily deepen the microcracks in the solar cells and affect the subsequent test results. Utility Model Content

[0005] The purpose of this invention is to provide a conveying mechanism and a microcrack detection machine for battery cells, so as to solve the problems mentioned in the background art.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, a conveying mechanism for detecting microcracks in solar cells is provided, comprising a frame, a conveying assembly, and a detection assembly, wherein:

[0008] The frame is provided with a feeding station and an inspection station at both ends along the first direction;

[0009] The conveying assembly includes two conveyor belts spaced apart along a second direction and two sets of adsorption components. The two conveyor belts are rotatably mounted on the frame, and the two sets of adsorption components are arranged along the second direction on the frame. Each conveyor belt corresponds to one set of adsorption components. Each set of adsorption components includes a plurality of Bernoulli suction cups spaced apart along a first direction. Each Bernoulli suction cup forms an adsorption area based on the Bernoulli effect on each corresponding conveyor belt. Each conveyor belt is configured to carry the battery cell to be tested at the loading station and transport the battery cell to be tested from the loading station through the adsorption area of ​​each corresponding Bernoulli suction cup to the testing station.

[0010] The detection component is mounted on the rack and located at the detection station, and is configured to perform microcrack detection on the battery cells located at the detection station.

[0011] Furthermore, the conveying mechanism for detecting microcracks in battery cells also includes a height adjustment component located at the detection station. The height adjustment component is configured to connect the battery cell to be tested at the detection station and bring it close to the detection component.

[0012] Furthermore, the height adjustment component is located at the middle clearance gap between the two conveyor belts and below the detection end of the detection component. The height adjustment component includes a height adjustment drive and a height adjustment plate. The height adjustment plate is mounted on the frame, either close to or away from the detection component. The fixed end of the height adjustment drive is mounted on the frame, and the movable end of the height adjustment drive is connected to the height adjustment plate. The height adjustment drive is configured to drive the height adjustment plate to a high or low position.

[0013] The height adjustment drive drives the height adjustment plate through the clearance notch to a high position, so as to bring the battery cell located at the detection station closer to the detection end of the detection component;

[0014] The height adjustment drive unit drives the height adjustment plate to a low position so that it extends below the clearance notch, allowing the tested battery cell to be placed at the testing station.

[0015] Furthermore, the inspection assembly includes an inspection frame, a rotary drive assembly, and a microcrack inspection component, wherein:

[0016] The testing frame is installed at the testing station of the machine frame. The microcrack detection component is installed on the testing frame and located directly above the testing station. The microcrack detection component is configured to perform microcrack detection on the battery cells located at the testing station. The rotary drive assembly is disposed on the testing frame. The drive end of the rotary drive assembly is connected to the microcrack detection component. The rotary drive assembly is configured to drive the microcrack detection component to rotate sequentially at multiple angles, so as to cooperate with the detection end of the microcrack detection component to perform detection on the battery cells at the testing station at multiple angles.

[0017] Furthermore, the rotary drive assembly includes an adjusting drive component, a guide unit, and an adjusting rod, wherein:

[0018] The microcrack detection component is mounted on the adjusting rod. The fixed end of the adjusting drive is mounted on the detection frame, and the driving end of the adjusting drive is connected to the adjusting rod. The guiding unit includes two guide plates, both of which are mounted on the detection frame and located at both ends of the adjusting rod. Each guide plate has an upwardly protruding guide groove in its middle. Both ends of the adjusting rod are installed in the corresponding guide grooves. The adjusting drive, in conjunction with the guide grooves at both ends, drives the adjusting rod to move, thereby moving the microcrack detection component.

[0019] Furthermore, the frame is equipped with a sensing component located at the testing station, and the sensing component is configured to sense whether the battery cell to be tested has moved to the testing station.

[0020] Secondly, a cell microcrack detection machine is provided, including the aforementioned conveying mechanism for detecting cell microcracks.

[0021] Compared with existing technologies, the advantages of the conveying mechanism and the microcrack detection machine for solar cells are as follows:

[0022] 1) Through the cooperation of the conveying component and the detection component, each conveyor belt carries the battery cells to be tested at the loading station and transports the battery cells to be tested from the loading station through the adsorption area of ​​each corresponding Bernoulli suction cup to the detection station. The detection component performs microcrack detection on the battery cells located at the detection station. By using the non-contact adsorption Bernoulli suction cup and the conveyor belt, the high stability of the battery cells to be tested is achieved, and the microcrack condition of the battery cells to be tested will not be affected.

[0023] 2) By combining the rotation drive assembly and the microcrack detection component, the solar cells can be inspected from various angles, effectively avoiding the omission of microcrack defects in the solar cells, and the inspection results are stable and reliable. Attached Figure Description

[0024] To more clearly illustrate and understand the technical solutions in the embodiments of this utility model, the accompanying drawings used in the background technology and embodiment description of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the conveying mechanism for detecting microcracks in battery cells provided in an embodiment of this utility model;

[0026] Figure 2 This is a side view schematic diagram of a conveying mechanism for detecting microcracks in battery cells provided in an embodiment of this utility model;

[0027] Figure 3 This is a front view schematic diagram of the detection component provided in an embodiment of this utility model;

[0028] Figure 4 yes Figure 1 Enlarged diagram of point A in the middle. Detailed Implementation

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] To facilitate understanding of this utility model, a more complete description of it will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figures 1 to 4 As shown, in this embodiment, a conveying mechanism for detecting microcracks in battery cells includes a frame 10, a conveying assembly 20, and a detection assembly 30, wherein: along the first direction ( Figure 1 The two ends of the conveying assembly 20 (in the X direction) are respectively provided with a loading station 11 and a detection station 12; the conveying assembly 20 includes two conveying lines along the second direction (in the X direction). Figure 1 The system consists of two conveyor belts 21 spaced apart in the Y direction and two sets of adsorption components. The two conveyor belts 21 are rotatably mounted on the frame 10. The two sets of adsorption components are arranged on the frame 10 along the second direction. Each conveyor belt 21 corresponds to one set of adsorption components. Each set of adsorption components includes several Bernoulli suction cups 22 spaced apart along the first direction. Each Bernoulli suction cup 22 forms an adsorption area based on the Bernoulli effect on each corresponding conveyor belt 21. Each conveyor belt 21 is configured to carry the battery cell 100 to be tested at the loading station 11 and transport the battery cell 100 to be tested from the loading station 11 through the adsorption area of ​​each corresponding Bernoulli suction cup 22 to the testing station 12. The testing component 30 is arranged on the frame 10 and located at the testing station 12. The testing component 30 is configured to perform microcrack detection on the battery cell 100 located at the testing station 12.

[0032] As can be seen, through the cooperation of the conveying component 20 and the detection component 30, each conveyor belt 21 carries the battery cell 100 to be tested at the loading station 11 and transports the battery cell 100 to be tested from the loading station 11 through the adsorption area of ​​each corresponding Bernoulli suction cup 22 to the detection station 12. The detection component 30 performs microcrack detection on the battery cell 100 located at the detection station 12. By using the non-contact adsorption of the Bernoulli suction cup 22 and the cooperation of the conveyor belt 21, the high stability of the battery cell 100 to be tested is achieved, and the microcrack condition of the battery cell 100 to be tested will not be affected.

[0033] The general principle of the Bernoulli suction cup 22 for detecting microcracks in battery cells proposed in this application embodiment to form an adsorption region based on the Bernoulli effect is as follows: gas is discharged through the air outlets of the Bernoulli suction cup 22 at both ends. Since the airflow velocity is high when discharged from the air outlets, the gas velocity on the side of the battery cell 100 near the Bernoulli suction cup 22 is greater than the gas velocity above the battery cell 100. According to the Bernoulli principle, a pressure difference will be generated on both sides and the top of the battery cell 100, thereby forming a downward stable pressure at the bottom of the battery cell 100, which improves the stability of the battery cell 100 transport.

[0034] As one implementation, the conveying mechanism for detecting microcracks in battery cells also includes a height adjustment component 40. The height adjustment component 40 is located at the detection station 12. The height adjustment component 40 is configured to connect the battery cell 100 to be tested located at the detection station 12 and bring it close to the detection component 30. Obviously, by setting the height adjustment component 40, the distance between the battery cell 100 to be tested and the detection component 30 can be changed, and the battery cell 100 can be tested from multiple angles.

[0035] In one embodiment, the height adjustment component 40 is disposed at the clearance gap 210 in the middle of the two conveyor belts 21 and below the detection end of the detection component 30. The height adjustment component 40 includes a height adjustment drive 41 and a height adjustment plate 42. The height adjustment plate 42 is disposed on the frame 10, which can be close to or away from the detection component 30. The fixed end of the height adjustment drive 41 is mounted on the frame 10, and the movable end of the height adjustment drive 41 is connected to the height adjustment plate 42. The height adjustment drive 41 is configured to drive the height adjustment plate 42 to a high position or a low position. The height adjustment drive 41 drives the height adjustment plate 42 through the clearance gap 210 to the high position, so as to bring the battery cell 100 located at the detection station 12 closer to the detection end of the detection component 30. The height adjustment drive 41 drives the height adjustment plate 42 to the low position, so as to extend below the clearance gap 210, so that the detected battery cell 100 is placed at the detection station 12.

[0036] In one embodiment, the detection assembly 30 includes a detection frame 31, a rotation drive assembly 32, and a microcrack detection component 33. The detection frame 31 is installed at the detection station 12 of the frame 10. The microcrack detection component 33 is installed on the detection frame 31 and located directly above the detection station 12. The microcrack detection component 33 is configured to perform microcrack detection on the battery cell 100 located at the detection station 12. The rotation drive assembly 32 is disposed on the detection frame 31. The drive end of the rotation drive assembly 32 is connected to the microcrack detection component 33. The rotation drive assembly 32 is configured to drive the microcrack detection component 33 to rotate sequentially at multiple angles, so as to cooperate with the detection end of the microcrack detection component 33 to perform detection on the battery cell 100 at the detection station 12 at multiple angles.

[0037] As can be seen, by combining the rotation drive assembly 32 and the microcrack detection component 33, the solar cell 100 can be inspected from various angles, effectively avoiding the occurrence of missed microcrack defects in the solar cell 100, and the inspection results are stable and reliable.

[0038] Specifically, the microcrack detection component 33 includes several ultrasonic transmitting probes 330 with their transmitting ends facing downwards, several ultrasonic receiving probes 331 with their receiving ends facing downwards, and a data analysis module 332. Each ultrasonic receiving probe 331 corresponds to one ultrasonic transmitting probe 330. The ultrasonic transmitting probe 330 is configured to emit ultrasonic signals to the surface of the battery cell 100 located at the detection station 12. The ultrasonic receiving probe 331 is configured to receive the ultrasonic signals emitted after passing through the surface of the battery cell 100 and transmit the signals to the data analysis module 332. The data analysis module 332 is mounted on the detection frame 31. The data analysis module 332 is configured to store the information received by the ultrasonic receiving probes 331 and, based on the waveform echo time and amplitude of the ultrasonic signal, fit the points that produce changes to form an image of the microcrack in the battery cell 100.

[0039] In one embodiment, the rotary drive assembly 32 includes an adjustment drive component 320, a guide unit, and an adjustment rod 321. The microcrack detection component 33 is mounted on the adjustment rod 321. The fixed end of the adjustment drive component 320 is mounted on the detection frame 31, and the driving end of the adjustment drive component 320 is connected to the adjustment rod 321. The guide unit includes two guide plates 322, both mounted on the detection frame 31 and located at opposite ends of the adjustment rod 321. Each guide plate 322 has an upwardly protruding guide groove 323 in its center. Both ends of the adjustment rod 321 are installed within the corresponding guide grooves 323. The adjustment drive component 320, in conjunction with the guide grooves 323 at both ends, drives the adjustment rod 321 to move, thereby causing the microcrack detection component 33 to move.

[0040] In one embodiment, a sensing component 50 is provided on the frame 10. The sensing component 50 is located at the detection station 12 and is configured to sense whether the battery cell 100 to be tested has moved to the detection station 12.

[0041] Based on the aforementioned conveying mechanism for detecting microcracks in solar cells, a solar cell microcrack detection machine is provided, including the aforementioned conveying mechanism for detecting microcracks in solar cells.

[0042] When the aforementioned conveying mechanism and microcrack detection machine for battery cells are in operation: First, a person or a robot places the battery cell 100 to be tested at the loading station 11 of the frame 10. Two conveyor belts 21 transport the battery cell 100 at the loading station 11 to the detection station 12 along the first direction. At the same time, Bernoulli suction cups 22 located on both sides adsorb the two corresponding sides of the battery cell 100 to be tested, ensuring the stable transport of the battery cell 100. Once the battery cell 100 is in place, the sensing component 50 senses the battery cell 100 to be tested. The device moves to the inspection station 12 and sends a stop signal to the two conveyor belts 21, which then stop working. The microcrack detection component 33 then inspects the cell 100. The height adjustment drive 41 drives the height adjustment plate 42 through the clearance notch 210 to a high position, thereby bringing the cell 100 located at the inspection station 12 closer to the inspection end of the inspection component 30. At the same time, the adjustment drive 320, in conjunction with the guide grooves 323 at both ends, drives the adjustment rod 321 to move, thereby moving the microcrack detection component 33 and performing multi-angle inspection on the cell 100.

[0043] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above examples. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A conveying mechanism for detecting microcracks in solar cells, characterized in that, The conveying mechanism for detecting microcracks in solar cells includes a frame and a conveying assembly, wherein: The frame is provided with a feeding station and an inspection station at both ends along the first direction; The conveying assembly includes two conveyor belts spaced apart along a second direction and two sets of adsorption components. The two conveyor belts are rotatably mounted on the frame, and the two sets of adsorption components are arranged along the second direction on the frame. Each conveyor belt corresponds to one set of adsorption components. Each set of adsorption components includes a plurality of Bernoulli suction cups spaced apart along a first direction. Each Bernoulli suction cup forms an adsorption area based on the Bernoulli effect on each corresponding conveyor belt. Each conveyor belt is configured to carry the battery cell to be tested at the loading station and transport the battery cell to be tested from the loading station through the adsorption area of ​​each corresponding Bernoulli suction cup to the testing station. An inspection component is provided on the rack and at the inspection station, and the inspection component is configured to perform microcrack detection on the battery cells located at the inspection station.

2. The conveying mechanism for detecting microcracks in battery cells according to claim 1, characterized in that, The conveying mechanism for detecting microcracks in solar cells also includes a height adjustment component located at the detection station. The height adjustment component is configured to connect the solar cell to be tested at the detection station and bring it close to the detection component.

3. The conveying mechanism for detecting microcracks in battery cells according to claim 2, characterized in that, The height adjustment component is located at the middle clearance gap between the two conveyor belts and below the detection end of the detection component. The height adjustment component includes a height adjustment drive and a height adjustment plate. The height adjustment plate is mounted on the frame and can be close to or away from the detection component. The fixed end of the height adjustment drive is mounted on the frame, and the movable end of the height adjustment drive is connected to the height adjustment plate. The height adjustment drive is configured to drive the height adjustment plate to a high position or a low position. The height adjustment drive drives the height adjustment plate through the clearance notch to a high position, so as to bring the battery cell located at the detection station closer to the detection end of the detection component; The height adjustment drive unit drives the height adjustment plate to a low position so that it extends below the clearance notch, allowing the tested battery cell to be placed at the testing station.

4. The conveying mechanism for detecting microcracks in battery cells according to claim 1, characterized in that, The inspection assembly includes an inspection frame, a rotary drive assembly, and a microcrack inspection component, wherein: The testing frame is installed at the testing station of the machine frame. The microcrack detection component is installed on the testing frame and located directly above the testing station. The microcrack detection component is configured to perform microcrack detection on the battery cells located at the testing station. The rotary drive assembly is disposed on the testing frame. The drive end of the rotary drive assembly is connected to the microcrack detection component. The rotary drive assembly is configured to drive the microcrack detection component to rotate sequentially at multiple angles, so as to cooperate with the detection end of the microcrack detection component to perform detection on the battery cells at the testing station at multiple angles.

5. The conveying mechanism for detecting microcracks in battery cells according to claim 1, characterized in that, The frame is equipped with a sensing component, which is located at the testing station. The sensing component is configured to sense whether the battery cell to be tested has moved to the testing station.

6. A cell microcrack detection machine, characterized in that, The cell microcrack detection machine includes a conveying mechanism for detecting cell microcracks as described in any one of claims 1 to 5.

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