A secondary sorting system and method for used power battery packs

Abstract

The present invention relates to a system and method for secondary sorting of waste power battery packs. The system includes: a conveyor belt and a detection box body. The conveyor belt is arranged through the detection box body and is used to transfer the waste power battery packs into the detection box body; a multi-dimensional detection component, which is installed in the detection box body and is used to collect the characteristic data of the waste power battery packs. The characteristic data includes the weight, the components of the escaped gas, and the appearance image of the waste power battery packs; a control system, which is communicatively connected to the conveyor belt and the multi-dimensional detection component, and is used to control the start and stop of the conveyor belt and the multi-dimensional detection component, as well as receive the data collected by the multi-dimensional detection component, analyze and process the data to determine the recycling grade of the waste power battery packs. By collecting the weight, the components of the escaped gas, and the appearance image data of the waste power battery packs, the present invention recycles the waste power battery packs and can more accurately judge the recycling grade.

Description

Technical Field

[0001] The present invention relates to the technical field of battery recycling, and particularly to a system and method for secondary sorting of waste power battery packs. Background Art

[0002] With the rapid development of the electric vehicle market, the installed capacity of power battery packs has been increasing year by year. However, the service life of power battery packs is limited, and the generation of a large number of waste power battery packs has brought a heavy burden to the environment. Therefore, the recycling and utilization of waste power battery packs are very important. The existing means of recycling waste power battery packs mainly adopt secondary sorting. The secondary sorting of waste power batteries includes detection, disassembly, sorting, repair, and recombination. Most of the current recycling means do not classify after detecting the battery health status, but disassemble and utilize them according to relatively severe or severely damaged battery packs. For battery packs with specifications not meeting the standards or slightly damaged ones, such a treatment method may be too wasteful. Classify, repair, and recombine them for energy storage or backup power supplies, etc., to achieve resource reuse and promote circular economy. Among them, the detection process provides a basis for the subsequent process of secondary sorting of waste power batteries, so the detection process is particularly important.

[0003] However, in actual application scenarios, waste batteries may release harmful gases or undergo quality changes due to reasons such as damage and aging. These problems are difficult to accurately judge based on appearance data alone. If the detection of harmful gases is ignored during the detection process, the internal state of the battery cannot be comprehensively grasped, because the presence of harmful gases may indicate problems such as abnormal internal chemical reactions or leakage of electrolytes in the battery. Similarly, the lack of quality detection may also lead to misjudgment of the actual performance of the battery, because the change in quality may reflect damage to the internal structure of the battery or loss of active substances, etc. These overlooked factors may mislead the classification and treatment of the battery. Therefore, relying solely on appearance data for classification often leads to inaccurate classification results, which in turn affects the effective recycling and resource reuse of waste power batteries. Summary of the Invention

[0004] The purpose of the present invention is to provide a system and method for secondary sorting of waste power battery packs to solve the problem of inaccurate classification caused by relying only on appearance data for waste power batteries in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A system for secondary sorting of waste power battery packs includes:

[0007] A conveyor belt and a detection box body, the conveyor belt is arranged through the detection box body, and the conveyor belt is used to transfer the waste power battery pack into the detection box body. The conveyor belt includes a plurality of conveyor belt pieces, and first clamping pieces and second clamping pieces are formed on opposite sides of the conveyor belt pieces, so that the conveyor belt pieces can be clamped or unclamped through the first clamping pieces and the second clamping pieces;

[0008] A multi-dimensional detection component, the multi-dimensional detection component is installed in the detection box body, and the multi-dimensional detection component is used to collect characteristic data of the waste power battery pack; the characteristic data includes the weight, the components of the escaping gas and the appearance image of the waste power battery pack;

[0009] A control system, the control system is communicatively connected to the conveyor belt and the multi-dimensional detection component, and the control system is used to control the start and stop of the conveyor belt and the multi-dimensional detection component; and receive the characteristic data collected by the multi-dimensional detection component, and analyze and process the characteristic data to determine the recycling grade of the waste power battery pack.

[0010] According to the above technical means, through the multi-dimensional detection component, three key data of the weight, the components of the escaping gas and the appearance image of the waste power battery pack can be collected simultaneously, and the collected characteristic data is more comprehensive; by comprehensively considering the weight change, the components of the escaping gas and the degree of appearance defects, the state of the waste power battery pack can be evaluated more accurately, so as to determine its recycling grade, significantly improving the accuracy and reliability of classification; the control system can not only control the start and stop of the conveyor belt and the detection component, but also automatically receive and process the collected data, thus realizing an efficient and automated sorting process, significantly improving the sorting efficiency and reducing the labor cost; the conveyor belt is composed of a plurality of conveyor belt pieces clamped together, and each conveyor belt piece can be separated from other conveyor belt pieces by unclamping, so that the separation process can be simple and convenient, and when one or more conveyor belt pieces are separated from other conveyor belt pieces, other conveyor belt pieces will not be damaged, protecting the stability and integrity of the conveyor belt.

[0011] Further, it further includes a clamping component, and the clamping component is rotatably installed in the detection box body; the clamping component is used to clamp and rotate the waste power battery pack on the conveyor belt, so that the multi-dimensional detection component can collect the appearance image of the waste power battery pack.

[0012] According to the above technical means, the clamping component can clamp and rotate the waste power battery pack, so that the multi-dimensional detection component can collect the appearance image of the battery pack from multiple angles. Through the all-round appearance detection, the appearance defects (such as deformation, cracks, corrosion, etc.) of the waste power battery pack can be identified more comprehensively, thus improving the accuracy and reliability of the appearance detection.

[0013] Further, the clamping assembly includes a base, a rotating assembly and a fixture. The base is installed inside the detection box; the fixture is rotatably installed on the base through the rotating assembly; the fixture is used for clamping the waste power battery pack.

[0014] According to the above technical means, the fixture is installed on the base through the rotating assembly, enabling the fixture to rotate flexibly. During the detection process, the clamping assembly can clamp the waste power battery pack and rotate it through the rotating assembly, so that the multi-dimensional detection assembly can collect the appearance images of the battery pack from different angles, improving the comprehensiveness and accuracy of the appearance detection; the design of the fixture enables the clamping assembly to precisely clamp the waste power battery pack, ensuring that the waste power battery pack remains stable during the detection process and avoiding shaking or falling caused by insufficient clamping, thereby improving the reliability of the detection.

[0015] Further, the fixture includes a first jaw, a second jaw and a driving assembly. The driving assembly is connected to the first jaw and the second jaw. The driving assembly can drive the first jaw and the second jaw to approach each other to clamp the waste power battery pack; the driving assembly can drive the first jaws to move away from each other to release the waste power battery pack.

[0016] According to the above technical means, the first jaw and the second jaw can approach or move away from each other to clamp or release the waste power battery pack.

[0017] Further, a length detection assembly is also included. The length detection assembly is installed outside the detection box and on one side of the conveyor belt; the length detection assembly is used for detecting the length of the waste power battery pack passing on the conveyor belt and uploading it to the control system;

[0018] The control system is communicatively connected to the driving assembly and the length detection assembly respectively. The control system can control the start and stop of the driving assembly according to the length of the waste power battery pack, thereby adjusting the distance between the first jaw and the second jaw to make the distance adapt to the length of the waste power battery pack; the control system can match one or more conveyor belt segments with the same length as the waste power battery pack according to the length of the waste power battery pack to carry the waste power battery pack.

[0019] According to the above technical means, the introduction of the length detection component ensures that the distance between the jaws can accurately adapt to the actual size of the battery pack, making the clamping more firm, avoiding the shaking or unstable clamping of the battery pack caused by too large or too small distance between the jaws. At the same time, the stable clamping state provides a more ideal detection condition for the multi-dimensional detection component (such as the image acquisition system), thereby further improving the detection accuracy and reliability. By automatically detecting the length of the used power battery pack and adjusting the distance between the jaws, it can seamlessly process used power battery packs of different specifications and sizes, not only avoiding clamping failures or detection errors caused by inconsistent battery pack sizes, but also enhancing the versatility and flexibility of the clamping component, enabling it to adapt to a wider range of battery pack types.

[0020] Further, the multi-dimensional detection component includes a pressure sensor, a gas sensor and an image acquisition system; the gas sensor is installed inside the detection box; the pressure sensor is located below the conveyor belt and close to the clamping component; the image acquisition system is located inside the detection box.

[0021] According to the above technical means, the pressure sensor can detect the weight change of the battery pack, and can judge whether the battery pack has a mass reduction due to the loss of internal chemical substances or structural damage. The gas sensor monitors the gas components escaping from the battery pack in real time to judge whether there is leakage of harmful or hazardous gases, so as to evaluate the safety of the battery pack. The image acquisition system collects the appearance image of the battery pack, and combined with image processing technology, can detect the appearance defects of the battery pack, such as deformation, cracks, corrosion, etc.

[0022] Further, there is also provided a method for hierarchical sorting of used power battery packs, and the method includes the following steps:

[0023] S1: The multi-dimensional detection component collects the characteristic data;

[0024] S2: The control system analyzes and processes the appearance image, weight and escaping gas components of the used power battery pack to obtain the appearance defect degree, weight change data and proportion of harmful components in the escaping gas of the used power battery pack;

[0025] S3: The control system comprehensively evaluates the appearance defect degree, weight change data and proportion of harmful components in the escaping gas of the used power battery pack to determine the recycling grade of the used power battery pack.

[0026] According to the above technical means, through the multi-dimensional detection component, three key data of the weight, the components of the escaping gas, and the appearance image of the used power battery pack can be collected simultaneously, and the collected characteristic data is more comprehensive; by comprehensively considering the weight change, the components of the escaping gas, and the degree of appearance defects, the state of the used power battery pack can be evaluated more accurately, so as to determine its recycling grade, significantly improving the accuracy and reliability of classification, avoiding the limitations of a single index, being able to comprehensively evaluate the state of the battery pack, and thus more accurately determining its recycling grade. The fusion analysis of multi-dimensional data can effectively reduce misjudgment and improve the reliability of the sorting result.

[0027] Further, the processing of the appearance image of the used power battery pack in S2 includes: performing denoising and image enhancement processing on the appearance image, performing data fusion on the processed appearance image, and then inputting the fused appearance image into a neural network model for detection to obtain the degree of appearance defects of the used power battery pack.

[0028] According to the above technical means, the neural network model can automatically learn and identify the defect features in the image, not only improving the detection efficiency, but also reducing the misjudgment caused by human factors, and further improving the accuracy rate.

[0029] Further, the processing of the weight of the used power battery pack in S2 includes: comparing the weight of the used power battery pack with the preset weight of the power battery pack to obtain the weight change data of the used power battery pack.

[0030] According to the above technical means, the weight change is a direct manifestation of phenomena such as the loss of internal chemical substances, structural damage, or electrolyte dryness in the battery pack. By comparing the weight change, the loss degree of the battery pack can be quantified, providing an important basis for the classification of the recycling grade of the used power battery pack; by accurately measuring the weight change, potential safety hazard problems such as short circuits and thermal runaway inside the used battery pack can be identified in advance.

[0031] Further, the processing of the escaping gas of the used power battery pack in S2 includes: comparing the escaping gas of the used power battery pack with the preset escaping gas of the power battery pack to obtain the proportion of the components of the escaping gas of the used power battery pack.

[0032] According to the above technical means, the accurate detection of the components of the escaping gas can discover potential thermal runaway, short circuits, or other faults inside the battery pack in advance, avoiding potential safety accidents.

[0033] The beneficial effects of the present invention:

[0034] 1. Through the multi-dimensional detection component, three key data of the weight, the components of the escaping gas, and the appearance image of the waste power battery pack can be collected simultaneously, and the collected characteristic data is more comprehensive;

[0035] 2. By comprehensively considering the weight change, the components of the escaping gas, and the degree of appearance defects, the state of the waste power battery pack can be evaluated more accurately, so as to determine its recycling grade, significantly improving the accuracy and reliability of classification;

[0036] 3. The control system can not only control the start and stop of the conveyor belt and the detection component, but also automatically receive and process the collected data, thus realizing an efficient and automated sorting process, significantly improving the sorting efficiency and reducing the labor cost;

[0037] 4. The conveyor belt is composed of multiple conveyor belt pieces connected by clamping. Each conveyor belt piece can be separated from other conveyor belt pieces by releasing the clamping, making the separation process simple and convenient, and when one or more conveyor belt pieces are separated from other conveyor belt pieces, other conveyor belt pieces will not be damaged, protecting the stability and integrity of the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the overall structural schematic diagram of the first embodiment;

[0039] Figure 2 is the specific structural schematic diagram of the flipping component of the first embodiment;

[0040] Figure 3 is the side view schematic diagram during the detection process of the first embodiment;

[0041] Figure 4 is the structural schematic diagram of the conveyor belt piece of the first embodiment;

[0042] Figure 5 is the cross-sectional view of the conveyor belt piece of the first embodiment;

[0043] Figure 6 is the flow schematic diagram of the second embodiment.

[0044] Among them, 1-conveyor belt, 11-conveyor belt piece, 111-first clamping part, 112-second clamping part, 113-limiting part;

[0045] 2-detection box;

[0046] 3-clamping component, 31-base, 32-rotating component, 33-fixture, 331-first jaw, 332-second jaw, 333-driving component;

[0047] 4-length detection component; 5-pressure sensor;

[0048] 6 - Image acquisition system, 61 - First acquisition component, 62 - Second acquisition component, 63 - Third acquisition component;

[0049] 7 - Door opening and closing. Detailed implementation manners

[0050] The following will illustrate the implementation manners of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0051] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0052] Embodiment 1

[0053] As Figure 1 shown, this embodiment proposes a secondary sorting system for waste power battery packs, including:

[0054] A conveyor belt 1 and a detection box body 2. The conveyor belt 1 runs through the detection box body 2. The conveyor belt 1 is used to transfer the waste power battery packs into the detection box body 2. The conveyor belt 1 includes a plurality of conveyor belt pieces 11. First clamping members 111 and second clamping members 112 are formed on the opposite sides of the conveyor belt pieces 11 relative to each other, so that the conveyor belt pieces 11 can be clamped or unclamped through the first clamping members 111 and the second clamping members 112;

[0055] A multi - dimensional detection component (not shown in the figure). The multi - dimensional detection component is installed in the detection box body 2. The multi - dimensional detection component is used to collect the characteristic data of the waste power battery packs; the characteristic data includes the weight, the components of the escaped gas, and the appearance image of the waste power battery packs;

[0056] A control system (not shown in the figure). The control system is communicatively connected to the conveyor belt 1 and the multi - dimensional detection component. The control system is used to control the start and stop of the conveyor belt 1 and the multi - dimensional detection component, and receive the characteristic data collected by the multi - dimensional detection component, analyze and process the characteristic data to determine the recycling grade of the waste power battery packs.

[0057] As Figure 1As shown in the figure, the usage process of the present invention is as follows: The conveyor belt 1 and the detection box body 2 are installed in sequence. The waste power battery pack is conveyed to the detection box body 2 through the conveyor belt 1. When the multi-dimensional detection component starts to detect the waste power battery pack, the conveyor belt 1 stops running. The multi-dimensional detection component detects the waste power battery pack and transmits the collected characteristic data to the control system. The control system analyzes the weight, the composition of the escaped gas, and the appearance image of the waste power battery pack in the characteristic data to determine the recycling grade of the waste power battery pack. The multi-dimensional detection component stops detecting. At this time, the conveyor belt 1 continues to run until the classification of the waste power battery pack is completed, and then the waste power battery pack echelon sorting system stops running.

[0058] Through the multi-dimensional detection component, three key data of the weight, the composition of the escaped gas, and the appearance image of the waste power battery pack can be collected simultaneously, and the collected characteristic data is more comprehensive; by comprehensively considering the weight change, the composition of the escaped gas, and the degree of appearance defects, the state of the waste power battery pack can be evaluated more accurately, so as to determine its recycling grade, significantly improving the accuracy and reliability of classification; the control system can not only control the start and stop of the conveyor belt 1 and the multi-dimensional detection component, but also automatically receive and process the collected data, thus realizing an efficient and automated sorting process, significantly improving the sorting efficiency and reducing the labor cost; the conveyor belt is composed of a plurality of conveyor belt pieces 11 that are snap-connected. Each conveyor belt piece 11 can be separated from other conveyor belt pieces 11 by releasing the snap connection, making the separation process simple and convenient, and when one or more conveyor belt pieces 11 are separated from other conveyor belt pieces 11, other conveyor belt pieces 11 will not be damaged, protecting the stability and integrity of the conveyor belt 1.

[0059] As Figure 1 shown in the figure, in this embodiment, it further includes a clamping component 3, and the clamping component 3 is rotatably installed in the detection box body 2; the clamping component 3 is used to clamp the waste power battery pack on the conveyor belt 1 and rotate it, so that the multi-dimensional detection component can collect the appearance image of the waste power battery pack.

[0060] As Figure 1 shown in the figure, preferably, the number of the clamping components 3 is two groups, which are respectively located on both sides of the conveyor belt 1.

[0061] The clamping component 3 can clamp the waste power battery pack and rotate it, so that the multi-dimensional detection component can collect the appearance image of the battery pack from multiple angles. Through the all-round appearance detection, the appearance defects (such as deformation, cracks, corrosion, etc.) of the battery pack can be identified more comprehensively, thereby improving the accuracy and reliability of the appearance detection.

[0062] As Figure 1 and Figure 2As shown in the figure, in this embodiment, the clamping assembly 3 includes a base 31, a rotating assembly 32, and a fixture 33. The base 31 is installed inside the detection box body 2; the fixture 33 is rotatably installed on the base 31 through the rotating assembly 32; the fixture 33 is used for clamping the waste power battery pack.

[0063] The fixture 33 is installed on the base 31 through the rotating assembly 32, so that the fixture 33 can rotate flexibly. During the detection process, the clamping assembly 3 can clamp the waste power battery pack and rotate it through the rotating assembly 32, so that the multi-dimensional detection component can collect the appearance images of the battery pack from different angles, improving the comprehensiveness and accuracy of the appearance detection; the design of the fixture 33 enables the clamping assembly 3 to accurately clamp the waste power battery pack, ensuring that the battery pack remains stable during the detection process and avoiding shaking or falling off caused by insufficient clamping, thereby improving the reliability of the detection.

[0064] As Figure 1 and Figure 2 shown in the figure, in this embodiment, the fixture 33 includes a first jaw 331, a second jaw 332, and a driving component 333. The driving component 333 is connected to the first jaw 331. The driving component 333 can drive the first jaw 331 and the second jaw 332 to approach each other to clamp the waste power battery pack; the driving component 333 can drive the first jaw 331 and the second jaw 332 to move away from each other to release the waste power battery pack. The first jaw 331 and the second jaw 332 can approach or move away from each other to clamp or release the waste power battery pack.

[0065] As Figure 1 shown in the figure, in this embodiment, it further includes a length detection component 4. The length detection component 4 is installed outside the detection box body 2 and on one side of the conveyor belt 1; the length detection component 4 is used for detecting the length of the waste power battery pack passing on the conveyor belt 1 and uploading it to the control system;

[0066] The control system is respectively communicatively connected to the driving component 333 and the length detection component 4. The control system can control the start and stop of the driving component 333 according to the length of the waste power battery pack, thereby adjusting the distance between the first jaw 331 and the second jaw 332 to make the distance adapt to the length of the waste power battery pack; the control system can match one or more conveyor belt segments 11 with the same length as the waste power battery pack according to the length of the waste power battery pack to carry the waste power battery pack.

[0067] Preferably, the number of the length detection components 4 is two groups, which are distributed symmetrically on both sides of the conveyor belt.

[0068] The introduction of the length detection component 4 ensures that the distance between the first jaw 331 and the second jaw 332 can accurately adapt to the actual size of the battery pack, making the clamping more secure and avoiding the shaking or unstable clamping of the used power battery pack caused by the excessive or too small distance between the first jaw 331 and the second jaw 332. At the same time, the stable clamping state provides a more ideal detection condition for the multi-dimensional detection component (such as the image acquisition system 6), thereby further improving the detection accuracy and reliability. By automatically detecting the length of the battery pack and adjusting the distance between the first jaw 331 and the second jaw 332, used power battery packs of different specifications and sizes can be seamlessly processed, not only avoiding clamping failures or detection errors caused by inconsistent battery pack sizes, but also enhancing the versatility and flexibility of the clamping component 3, enabling it to adapt to a wider range of battery pack types.

[0069] At the same time, limiting members 113 are formed on both sides of the conveyor belt 1 to prevent the used power battery pack from detaching from the conveyor belt 1 during the process of the conveyor belt 1 transporting the used power battery pack, improving the safety of the conveyor belt 1.

[0070] Preferably, as Figure 1 shown, in this embodiment, the multi-dimensional detection component includes a pressure sensor 5, a gas sensor (not shown in the figure), and an image acquisition system 6. The gas sensor is installed inside the detection box 2 and is close to the clamping component 3. The image acquisition system 6 is located inside the detection box 2.

[0071] Through the pressure sensor 5, the weight change of the battery pack can be detected, and it can be judged whether the used power battery pack has a reduced mass due to the loss of internal chemical substances or structural damage. By the gas sensor, the gas components escaping from the battery pack are monitored in real time to judge whether there is leakage of harmful or hazardous gases, thereby evaluating the safety of the used power battery pack. By the image acquisition system 6, the appearance images of the used power battery pack are collected, and combined with image processing technology, the appearance defects of the used power battery pack, such as deformation, cracks, corrosion, etc., can be detected.

[0072] As Figure 1 shown, preferably, the image acquisition system 6 includes a first acquisition member 61, a second acquisition member 62, and a third acquisition member 63. The first acquisition member 61 is located at the top of the detection box 2 and is used to collect the appearance images of the four faces of the used power battery pack. The second acquisition member 62 and the third acquisition member 63 are respectively located on both sides of the conveyor belt 1 and are used to collect the appearance images of two faces of the used power battery pack. Through the first acquisition member 61, the second acquisition member 62, and the third acquisition member 63, the appearance images of the six faces of the used power battery pack can be obtained, and the appearance defects of the used power battery pack can be detected more comprehensively.

[0073] As Figure 1As shown, preferably, a lifting assembly (not shown in the figure) is further included, and the lifting assembly is located below the pressure sensor 5, so that the lifting assembly can lift the transmission belt 11 with the used power battery pack. If the used power battery pack is aged to the point that the structure is very loose, the first clamp 331 and the second clamp 332 will drop the fragments when clamping it, so as to prevent the fragments from scattering around and causing the weight of the used power battery pack to be inaccurate.

[0074] like Figure 3 As shown, preferably, two groups of switch doors 7 are also included, and each switch door 7 is respectively installed on the detection box 2, so that during the detection process of the waste power battery pack by the multi-dimensional detection component, the two groups of switch doors 7 can abut against each other, so that the gas sensor can detect the gas emitted from the waste power battery pack without being disturbed by external gas.

[0075] In summary, if Figures 1 - 5 As shown, the use process of the present invention is as follows: the entire system is installed in sequence, and the conveyor belt 1 conveys the waste power battery pack, such as Figure 1 As shown, the direction of the arrow represents the conveying direction of the waste power battery pack. The waste power battery pack first passes through the length detection component 4 to obtain the length data of the waste power battery pack, and the length data is transmitted to the control system. The control system selects the number of conveyor belt pieces 11 that match the length data to form a tray to carry the waste power battery pack, and then transmits it to the inside of the detection box 2. At this time, the conveyor belt 1 stops running, the switch door 7 is closed, and the lifting component raises the transmission belt piece 11 with the waste power battery pack and releases the clamping connection with other conveyor belt pieces 11. The pressure sensor 5 and the gas sensor respectively obtain the weight data and the escaped gas composition of the waste power battery pack and transmit them to the control system. The clamping component 3 The power battery pack is clamped and rotated, and at the same time, the first collecting component 61 obtains the appearance images of the four sides of the waste power battery pack. The conveyor belt 1 runs the waste power battery pack through the second collecting component 62 and the third collecting component 63 to obtain the appearance images of the other two sides of the waste power battery pack (there is no requirement for the order in which the waste power battery pack passes through the clamping component 3, the second collecting component 62 and the third collecting component 63) and transmits them to the control system. The control system analyzes and processes the weight data, the escaped gas composition and the appearance images of the six sides of the waste power battery pack to determine the recycling level of the waste power battery pack, opens the switch door 7 and starts the conveyor belt 1, and repeats the above operations until the sorting is completed.

[0076] Embodiment 2

[0077] like Figure 1 and Figure 6 As shown, in this embodiment, a method for sorting waste power battery packs in stages is also included, comprising the following steps:

[0078] S1: The multi-dimensional detection component collects feature data;

[0079] S2: The control system analyzes and processes the appearance image, weight and escaped gas composition of the waste power battery pack to obtain the appearance defect degree, weight change data and proportion of harmful components in the escaped gas of the waste power battery pack;

[0080] S3: The control system conducts a comprehensive evaluation of the degree of appearance defects, weight change data and the proportion of harmful components in the escaped gas of the used power battery pack to determine the recycling level of the used power battery pack.

[0081] Through multi-dimensional detection components, three key data of waste power battery packs, namely weight, escaped gas composition and appearance image, can be collected simultaneously, and the collected feature data is more comprehensive; by comprehensively considering weight changes, escaped gas composition and the degree of appearance defects, the state of waste power battery packs can be more accurately evaluated, thereby determining their recycling level, significantly improving the accuracy and reliability of classification, avoiding the limitations of a single indicator, and being able to comprehensively evaluate the state of the battery pack, thereby more accurately determining its recycling level. The fusion analysis of multi-dimensional data can effectively reduce misjudgments and improve the reliability of sorting results.

[0082] Preferably, the comprehensive evaluation is specifically to score the degree of appearance defects, weight change data and proportion of harmful components in the escaped gas of the used power battery pack respectively to obtain a first scoring result, a second scoring result and a third scoring result, and to perform weighted addition on the first scoring result, the second scoring result and the third scoring result to obtain the scoring result.

[0083] like Figure 1 and Figure 6 As shown, in this embodiment, the processing of the appearance image of the waste power battery pack in S2 includes: denoising and image enhancement processing of the appearance image, data fusion of the processed appearance image, and then inputting the fused appearance image into the neural network model for detection to obtain the appearance defect degree of the waste power battery pack. The neural network model can automatically learn and identify defect features in the image without manually setting complex detection rules, which not only improves the detection efficiency, but also reduces misjudgments caused by human factors, further improving the intelligence level of the system.

[0084] Preferably, the neural network model used is a pre-trained one for detecting appearance defects of used power battery packs, such as a Resnet50 neural network model.

[0085] Preferably, data fusion of the processed appearance image specifically includes stitching images of each perspective of the appearance image of the used power battery pack to obtain three-dimensional image data of the used power battery pack, so as to more directly detect bulging or denting problems in appearance defects.

[0086] Preferably, a to-be-detected image of the battery to be detected is obtained, where the to-be-detected image includes; the to-be-detected image of the battery to be detected is input into an appearance defect recognition model of the battery for feature extraction. Based on a convolutional module, low-level features such as edges, line segments, and contours of the to-be-detected image are extracted, and the low-level features are integrated based on a downsampling convolutional module; based on a fully-connected neural network, the integrated low-level features are secondarily integrated to perform appearance defect detection of the battery, and a detection result is output.

[0087] Preferably, the appearance image further includes an identification code of the used power battery pack, and the appearance image data and weight data of the used power battery pack under the factory state can be obtained through the identification code of the used power battery pack.

[0088] As Figure 1 and Figure 6 shown, in this embodiment, the processing of the weight of the used power battery pack in S2 includes: comparing the weight of the used power battery pack with the preset weight of the power battery pack to obtain the weight change data of the used power battery pack.

[0089] The weight change is a direct manifestation of phenomena such as the loss of internal chemical substances, structural damage, or electrolyte drying in the battery pack. By comparing the weight change, the loss degree of the used power battery pack can be quantified, providing an important basis for the classification of the recycling level of the used power battery pack; by accurately measuring the weight change, potential short-circuit and thermal runaway safety hazard problems inside the used power battery pack can be identified in advance.

[0090] Preferably, the weight data of the used power battery pack under the factory state is the preset weight of the power battery pack.

[0091] As Figure 1 and Figure 6 shown, in this embodiment, the processing of the dissipated gas of the used power battery pack in S2 includes: comparing the dissipated gas of the used power battery pack with the preset dissipated gas of the power battery pack to obtain the proportion of harmful components in the dissipated gas of the used power battery pack. Accurate detection of the dissipated gas components can detect potential thermal runaway, short circuit, or other faults inside the used power battery pack in advance, avoiding potential safety accidents.

[0092] Preferably, the harmful gas components include hydrogen sulfide, carbon monoxide, methane, carbon fluoride, etc.

[0093] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A secondary sorting system for used power battery packs, characterized in that, Comprising: A conveyor belt (1) and a detection box body (2), the conveyor belt (1) is arranged through the detection box body (2), the conveyor belt (1) is used for delivering the waste power battery pack into the detection box body (2), the conveyor belt (1) includes a plurality of conveyor belt pieces (11), and first clamping members (111) and second clamping members (112) are formed on opposite sides of the conveyor belt piece (11), so that the conveyor belt pieces (11) can be clamped or unclamped through the first clamping members (111) and the second clamping members (112); A multi-dimensional detection component, the multi-dimensional detection component is installed in the detection box body (2), and the multi-dimensional detection component is used for collecting characteristic data of the waste power battery pack; the characteristic data includes the weight, the component of the escaped gas and the appearance image of the waste power battery pack; The multi-dimensional detection component includes a pressure sensor (5), a gas sensor and an image acquisition system (6), the pressure sensor (5) is located below the conveyor belt (1); the gas sensor is installed in the detection box body (2); The image acquisition system (6) is located inside the detection box body (2), the image acquisition system (6) includes a first acquisition member (61), a second acquisition member (62) and a third acquisition member (63), the first acquisition member (61) is located at the top of the detection box body (2), and the second acquisition member (62) and the third acquisition member (63) are respectively located on both sides of the conveyor belt (1); A lifting component, the lifting component is located below the pressure sensor (5), so that the lifting component can lift the conveyor belt piece (11) carrying the waste power battery pack; It further includes a length detection component (4), the length detection component (4) is installed outside the detection box body (2) and on one side of the conveyor belt (1); the length detection component (4) is used for detecting the length of the waste power battery pack passing on the conveyor belt (1) and uploading it to the control system; A control system, the control system is communicatively connected to the conveyor belt (1), the multi-dimensional detection component and the length detection component (4), the control system is used for controlling the start and stop of the conveyor belt (1) and the multi-dimensional detection component, the control system can match one or more conveyor belt pieces (11) with the same length according to the length data of the waste power battery pack to carry the waste power battery pack, and receive the characteristic data collected by the multi-dimensional detection component, and analyze and process the characteristic data to obtain the appearance defect degree, the weight change data and the proportion of harmful components of the escaped gas of the waste power battery pack, and the control system comprehensively evaluates the appearance defect degree, the weight change data and the proportion of harmful components of the escaped gas of the waste power battery pack to determine the recycling grade of the waste power battery pack.

2. The secondary sorting system for waste power battery packs according to claim 1, characterized in that, It further includes a clamping assembly (3). The clamping assembly (3) is rotatably installed in the detection box body (2), and the pressure sensor (5) is close to the clamping assembly (3). The clamping assembly (3) is used to clamp the waste power battery pack on the conveyor belt (1) and rotate it, so that the multi-dimensional detection assembly can collect the appearance image of the waste power battery pack.

3. The secondary sorting system for waste power battery packs according to claim 2, wherein The clamping assembly (3) includes a base (31), a rotating assembly (32) and a fixture (33). The base (31) is installed in the detection box body (2). The fixture (33) is rotatably installed on the base (31) through the rotating assembly (32). The fixture (33) is used to clamp the waste power battery pack.

4. A secondary sorting system for used power battery packs according to claim 3, characterized in that, The fixture (33) includes a first jaw (331), a second jaw (332) and a driving assembly (333). The driving assembly (333) is connected to the first jaw (331) and the second jaw (332). The driving assembly (333) can drive the first jaw (331) and the second jaw (332) to approach each other to clamp the waste power battery pack. The driving assembly (333) can drive the first jaw (331) and the second jaw (332) to move away from each other to release the waste power battery pack.

5. The secondary sorting system for waste power battery packs according to claim 4, characterized in that, The control system is respectively communicatively connected to the driving assembly (333) and the length detection assembly (4). The control system can control the start and stop of the driving assembly (333) according to the length of the waste power battery pack, so as to adjust the distance between the first jaw (331) and the second jaw (332) to make the distance adapt to the length of the waste power battery pack.

6. A method for hierarchical sorting of waste power battery packs, characterized in that, Using the sorting system of any one of claims 1-5, the method includes the following steps: S1: The multi-dimensional detection assembly collects the characteristic data. S2: The control system analyzes and processes the appearance image, weight and escaped gas components of the waste power battery pack to obtain the appearance defect degree, weight change data and proportion of harmful components in the escaped gas of the waste power battery pack. S3: The control system comprehensively evaluates the appearance defect degree, weight change data and proportion of harmful components in the escaped gas of the waste power battery pack to determine the recycling grade of the waste power battery pack.

7. A method for hierarchical sorting of used power battery packs according to claim 6, characterized in that, The processing of the appearance image of the waste power battery pack in S2 includes: performing denoising and image enhancement processing on the appearance image, performing data fusion on the processed appearance image, and then inputting the fused appearance image into a neural network model for detection to obtain the appearance defect degree of the waste power battery pack.

8. A method for hierarchical sorting of waste power battery packs according to claim 6, characterized in that, The processing of the weight of the waste power battery pack in S2 includes: comparing the weight of the waste power battery pack with the preset weight of the power battery pack to obtain the weight change data of the waste power battery pack.

9. A method for hierarchical sorting of waste power battery packs according to claim 6, characterized in that, The treatment of the escaped gas of the waste power battery pack in S2 includes: comparing the escaped gas of the waste power battery pack with the escaped gas of a preset power battery pack to obtain the proportion of harmful components in the escaped gas of the waste power battery pack.

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