A sorting device and method for retired power batteries based on an audio classifier model

Abstract

This invention discloses a sorting device and method for retired power batteries based on an audio classifier model. The device includes a screening plate (1), a sound acquisition module (2), a sliding pipe (3), a branching pipe (4), a delivery cylinder (5), a sorting cavity (8), a flexible pipe device (10), a conveyor belt mechanism (11), a screen (12), and a controller. The lower end of the screening plate is connected to the flexible pipe device, the lower end of the flexible pipe device is connected to the sliding pipe, the outer wall of the sliding pipe is equipped with a sound acquisition module, a re-sorting gate is installed in the branching pipe at the bottom of the sliding pipe, a delivery cylinder is installed at the lower end of the first opening of the branching pipe, a sorting cavity is installed at the lower end of the delivery cylinder, a conveyor belt mechanism is installed on the second opening side of the branching pipe, and a rod-type flexible screen is installed on the screening plate. This invention uses an audio classifier model within the controller to discriminate sound signals, achieving sorting of retired power batteries with high accuracy and efficiency, and can adapt to the automated sorting of retired power batteries of different specifications.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of retired power battery sorting equipment, in particular to a retired power battery sorting device and method based on an audio classifier model. BACKGROUND

[0002] With the rapid development of the electric vehicle industry, the number of retired power batteries is also increasing. Power batteries contain harmful substances such as heavy metals and organic matter. If not properly handled, it will harm the environment and human health, so the recycling of retired power batteries is a problem that needs to be solved. Under the background of low-carbon and green development, the research of retired power battery recycling technology is particularly necessary. Through sorting and recycling, resource reuse can be realized, the ecological environment can be protected, economic benefits can be improved, and the modernization construction of harmonious coexistence between man and nature can be accelerated.

[0003] The existing recycling of power batteries needs to classify batteries of different specifications. The existing sorting equipment has the problems of high error rate, high cost and low efficiency. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a retired power battery sorting device and method based on an audio classifier model. The retired power battery is sorted according to the specifications of the retired power battery and the sound signals generated by the battery sliding in the pipeline. The audio classifier model in the controller discriminates the sound signals, realizes the sorting of the retired power battery, has high accuracy and high efficiency, and can adapt to the automatic sorting of retired power batteries of different specifications.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0006] A retired power battery sorting device based on an audio classifier model, comprising a screening plate (1), a sound collection module (2), a sliding pipeline (3), a bifurcated pipeline (4), a feeding cylinder (5), a sorting cavity (8), a flexible pipeline device (10), a conveyor belt mechanism (11), a rod type flexible screen (12), and a controller, characterized in that: the lower end of the screening plate is connected with the flexible pipeline device, the lower end of the flexible pipeline device is connected with the sliding pipeline, the outer peripheral wall of the sliding pipeline is provided with the sound collection module, the bottom end of the sliding pipeline is provided with the bifurcated pipeline, the bifurcated pipeline is provided with a re-sorting gate plate, the first pipe opening of the bifurcated pipeline is provided with the feeding cylinder at the lower end, the feeding cylinder is provided with the sorting cavity at the lower end, the second pipe opening of the bifurcated pipeline is provided with the conveyor belt mechanism, and the screening plate is provided with the rod type flexible screen.

[0007] Further, the mesh size of the rod type flexible screen (12) can be adjusted by the pitch adjusting motor, and the controller controls the pitch adjusting motor to adjust the size of the screen mesh according to the sound signal frequency collected by the sound collection module, and screens out a certain specification of retired power battery; it includes: the controller controls the pitch adjusting motor of the rod type flexible screen, adjusts the pitch of each rod of the rod type flexible screen to control the size of the screen mesh, and vibrates the screen through the vibration motor of the screen to screen out a certain specification of retired power battery, so that it falls into the flexible pipe (13) of the flexible pipe device.

[0008] Further, the flexible pipe device (10) includes a flexible pipe (13), an adjusting spring (14), a flexible pipe driving motor (15), and a flexible pipe is arranged on the upper end of the sliding pipe (3), the outer circumferential side of the flexible pipe is connected with the shell of the flexible pipe device through a plurality of adjusting springs and a flexible pipe driving motor, the flexible pipe driving motor is drivingly connected with the adjusting spring, and the caliber size of the flexible pipe can be adjusted by the contraction and stretching of the adjusting spring caused by the forward and reverse rotation of the flexible pipe driving motor. Change or adjust.

[0009] Further, the first pipe opening lower end of the bifurcated pipe (4) is connected to the delivery cylinder, the bottom of the delivery cylinder is provided with a trapdoor (6), the trapdoor is connected with a trapdoor driving motor (7), the trapdoor driving motor is arranged on the upper part of the sorting cavity, and the trapdoor driving motor is used for driving the opening / closing of the trapdoor; the lower end of the sorting cavity is provided with a sorting cavity driving motor (9), and the sorting cavity driving motor is used for driving the sorting cavity to rotate; the sliding pipe is a circumferential closed pipe, which can better collect the sound of the battery sliding in the sliding pipe and reduce external interference; the sound collection module is closely attached to the outer side wall of the sliding pipe, one end of the bifurcated pipe at the end of the sliding pipe leads to the delivery cylinder, and the other end leads to the conveyor belt mechanism, and a re-sorting shutter (4) is arranged at the bifurcation of the bifurcated pipe.

[0010] Further, when the sound signal collected by the sound collection module (2) is mixed, that is, different specifications of retired power batteries enter the sliding pipe, the controller controls the re-sorting gate (4) to close the main sorting pipe leading to the dropping cylinder (5) and open the re-sorting pipe leading to the conveying belt mechanism (11), and the retired power battery will fall onto the conveying belt mechanism and be transported to the screening plate (1) for re-sorting; when the signal collected by the sound collection module is not mixed, the controller controls the re-sorting gate to close the re-sorting pipe leading to the conveying belt mechanism and open the main sorting pipe leading to the dropping cylinder, and the retired power battery will fall into the dropping cylinder and be sorted subsequently; when the retired power battery falls from the sliding pipe (3), it will fall into the dropping cylinder (5), and the controller will determine which type of battery according to the sound signal collected by the sound collection module, control the sorting cavity driving motor (9) to rotate the sorting cavity (8) to align the corresponding sorting cavity with the dropping cylinder, and then control the flap door driving motor to drive the flap door (6) to open, so that the retired power battery falls into the corresponding sorting cavity.

[0011] Further, the sorting cavity (8) is in the shape of a cylinder and is composed of three 1 / 3 cylindrical cavities for classifying square, cylindrical and soft-pack batteries, and a sorting cavity driving motor (9) arranged below the sorting cavity is used to rotate the sorting cavity, and the dropping cylinder (5) is in the shape of a quadrangular frustum of a pyramid, and the controller is electrically connected with the sound collection module and each power component.

[0012] Further, a splicable structure is adopted to tightly connect multiple screening plates (1) to form a scalable retired power battery sorting system, which can be applied to the sorting of retired power batteries of various scales.

[0013] A sorting method of a retired power battery sorting device based on an audio classifier model, which comprises the following steps:

[0014] Step S1: The audio classifier model in the controller is realized based on a neural network, which can quickly convert a sound signal into a sound spectrum graph to realize rapid identification of the type of retired power battery.

[0015] Step S2: The controller controls the interval adjusting motor to adjust the size of the screen grid according to the sound signal frequency collected by the sound collecting module (2); when the sound signal frequency is low, at this time, there are few retired power batteries passing through the sliding pipe, the controller controls the screen grid to become larger, so that larger batteries can pass into the sliding pipe, and a certain specification of retired power batteries is screened out through the vibration of the vibration motor; according to the sound signal collected by the sound collecting module, the sound signal is input into the controller; according to the audio classifier model in the controller, the collected sound signal is distinguished, if there is a mixed situation of sound signal, that is, different specifications of batteries enter the sliding pipe, then the mixed specification batteries will be transported to the screening plate for re-sorting by the conveying belt mechanism (11), and the controller controls the screen grid to become smaller so that the larger specification batteries cannot pass through the sliding pipe; if there is no mixed situation of sound signal, if there is no mixed situation of signal, the controller controls the sorting mechanism to sort the retired power batteries through the feeding cylinder (5) for subsequent sorting.

[0016] Further, the step S1 comprises:

[0017] Step S11: rapidly converting the collected.wav format sound wave sequence into a spectrogram image; wherein, the sound collecting experiment of the existing battery sample is repeatedly carried out in the sliding pipe (3), and the discharge audio is obtained to construct a sample library;

[0018] Step S12: wherein, the sound signal audio of different types of batteries rubbing inside the sliding pipe is recorded respectively, based on the principle of battery and sliding pipe rubbing vibration sound, an experimental platform is built, and the sound signal of different types of batteries rubbing inside the pipe is collected; and the collected discharge audio is preprocessed, the preprocessing includes pre-emphasis, frame windowing, endpoint detection and filtering denoising, removes the power frequency noise, highlights the discharge characteristics, and improves the audio quality;

[0019] Step S13: through time-frequency analysis of the discharge sound signal, relevant statistical indicators are extracted to represent the sound change characteristics, different types of batteries are associated with their friction sound prints, and relevant indicators are extracted to represent the difference between battery types; the sound signal feature extraction method of the spectrogram is adopted, the spectrogram is selected to extract more complete short-time frequency, energy distribution and other characteristics, the spectrogram fast feature extraction algorithm is completed, the spectrogram is batch generated, the audio and spectrogram sample library of different types of batteries moving in the sliding pipe 3 is established, and data is prepared for neural network training.

[0020] The application discloses a retired power battery sorting device and method based on an audio classifier model.

[0021] The application can sort or re-sort according to the mixed signals of the sound signals, greatly improves the accuracy and efficiency of sorting, and realizes the automatic identification and sorting of the retired power battery with high efficiency, high accuracy and low cost.

[0022] The application can realize the automatic identification and sorting of the retired power battery, complete the battery sorting faster and more accurately, improve the battery classification efficiency, reduce the artificial intensity, and realizes the automatic identification and sorting of the retired power battery with high efficiency, high accuracy and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 The application discloses a retired power battery sorting device and method based on an audio classifier model.

[0024] Fig. 2 The application discloses a retired power battery sorting device and method based on an audio classifier model.

[0025] Fig. 3 The application discloses a retired power battery sorting device and method based on an audio classifier model.

[0026] In the figure: the screening plate 1, the microphone module / sound collection module 2, the sliding pipe 3, the bifurcated pipe 4 (provided with a re-sorting gate), the throwing cylinder / throwing pipe 5, the flap door 6, the flap door driving motor 7, the sorting cavity 8, the sorting cavity driving motor 9, the flexible pipe device 10, the conveying belt mechanism 11, the rod type flexible screen 12, the flexible pipe 13, the adjusting spring 14, and the flexible pipe driving motor 15. DETAILED DESCRIPTION

[0027] To make the technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present invention, and are only used to explain the present invention, not to limit the present invention. It should be noted that, for ease of description, only the parts / structures related to the present invention are shown in the accompanying drawings. Other related parts can be referred to with ordinary design. In the absence of conflict, the embodiments and technical features in the embodiments of the present invention can be combined with each other to obtain new embodiments.

[0028] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Furthermore, unless otherwise defined, the technical or scientific terms used in the description of this invention should have the ordinary meaning understood by those skilled in the art.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] like Figs. 1-3 As shown, a sorting device for retired power batteries based on an audio classifier model includes a screening plate 1, a microphone module / sound acquisition module 2, a sliding pipe 3, a branch pipe 4, a delivery cylinder 5, a sorting cavity 8, a flexible pipe device 10, a conveyor belt mechanism 11, a rod-type flexible screen 12, and a controller. The device is characterized in that: the lower end of the screening plate 1 is connected to the flexible pipe device 10; the lower end of the flexible pipe device 10 is connected to the sliding pipe 3; the sound acquisition module 2 is installed on the outer periphery of the sliding pipe 3; a branch pipe 4 is provided at the bottom end of the sliding pipe 3; a re-sorting gate is provided inside the branch pipe 4; the delivery cylinder 5 is provided at the lower end of the first opening of the branch pipe 4; the sorting cavity 8 is provided at the lower end of the delivery cylinder 5; the conveyor belt mechanism 11 is provided on the second opening side of the branch pipe 4; and a rod-type flexible screen 12 is provided on the screening plate 1.

[0031] The mesh size of the rod-type flexible screen 12 can be adjusted by the spacing adjustment motor. The controller controls the spacing adjustment motor to adjust the mesh size of the rod-type flexible screen 12 according to the frequency of the sound signal collected by the sound acquisition module 2, so as to screen out retired power batteries of a certain specification. It includes: the controller controls the spacing adjustment motor of the control rod-type flexible screen 12, adjusts the spacing of each rod of the rod-type flexible screen 12 to control the mesh size of the screen 12, and the vibration motor of the screen 12 vibrates to screen out retired power batteries of a certain specification, so that they fall into the flexible pipe device 10 / flexible pipe 13.

[0032] The flexible pipe device 10 comprises a flexible pipe 13, an adjusting spring 14, a flexible pipe driving motor 15, the outer peripheral side / outer peripheral wall of the flexible pipe 13 is connected with the shell of the flexible pipe device 10 through the adjusting spring 14 and the flexible pipe driving motor 15, the flexible pipe driving motor 15 is drivingly connected with the adjusting spring 14, and the caliber size of the flexible pipe 13 can be adjusted by the contraction and expansion of the adjusting spring 14 caused by the forward and reverse rotation of the flexible pipe driving motor 15.

[0033] The first pipe end of the bifurcated pipe 4 is connected to the dropping cylinder 5, the bottom of the dropping cylinder 5 is provided with a flap door 6, the flap door 6 is connected with a flap door driving motor 7, the flap door driving motor 7 is arranged on the upper part of the sorting cavity 8, and the flap door driving motor 7 is used for driving the opening / closing of the flap door 6; the lower end of the sorting cavity 8 is provided with a sorting cavity driving motor 9, and the sorting cavity driving motor 9 is used for driving the rotation of the sorting cavity 8.

[0034] The sliding pipe 3 is a circumferentially closed pipe, which can better collect the sound of the battery sliding in the sliding pipe 3 and reduce external interference; the sound collecting module 2 is tightly attached to the outer lateral wall of the sliding pipe 3, one end of the bifurcated pipe 4 at the end of the sliding pipe 3 leads to the dropping cylinder 5, and the other end leads to the conveying belt mechanism 11, and a heavy sorting gate 4 is arranged at the bifurcation of the bifurcated pipe 4.

[0035] When the sound signal collected by the sound collecting module 2 is mixed, that is, different specifications of the retired power battery enter the sliding pipe 3, the controller controls the heavy sorting gate 4 to close the main sorting pipe leading to the dropping cylinder 5 and open the heavy sorting pipe leading to the conveying belt mechanism 11, and the retired power battery falls on the conveying belt mechanism 11 and is conveyed to the screening plate 1 for heavy sorting; when the signal collected by the sound collecting module 2 is not mixed, the controller controls the heavy sorting gate 4 to close the heavy sorting pipe leading to the conveying belt mechanism 11 and open the main sorting pipe leading to the dropping cylinder 5, and the retired power battery falls into the dropping cylinder 5 and is sorted subsequently.

[0036] When the retired power battery falls from the sliding pipe 3, it falls into the dropping cylinder 5, the controller discriminates which type of battery according to the sound signal collected by the microphone module / sound collecting module 2, controls the sorting cavity driving motor 9 to rotate the sorting cavity 8 to align the corresponding sorting cavity 8 with the dropping cylinder 5, and then controls the flap door driving motor 7 to drive the flap door 6 to open, so that the retired power battery falls into the corresponding sorting cavity 8.

[0037] The sorting cavity 8 is cylindrical and is composed of three 1 / 3 cylindrical cavities, which can be used for classifying square, cylindrical and soft package batteries, and a sorting cavity driving motor 9 arranged below the sorting cavity 8 is used for rotating the sorting cavity 8; the dropping cylinder 5 is in the shape of a quadrangular frustum of a pyramid, and the controller is electrically connected with each motor, the sound collecting module 2 and each power assembly.

[0038] The controller comprises a collecting module, a conversion module, a comparison module, a logical operation module and a correction module, and each motor is a servo motor, a stepping motor or a logic programmable control motor; the number of the adjusting springs 14 is 3-6.

[0039] The application adopts a splicable structure, a plurality of screening plates 1 can be closely connected to form a scalable retired power battery sorting system, and can be applied to the sorting of large-scale retired power batteries; by splicing different numbers of screening plates 1, the size of the sorting system can be adjusted according to actual needs, and efficient and high-accuracy retired power battery sorting can be realized.

[0040] A sorting method of a retired power battery sorting device based on an audio classifier model comprises the following steps:

[0041] Step S1: the audio classifier model in the controller is realized based on a neural network, sound signals can be quickly converted into spectrograms, and the type of the retired power battery can be quickly identified;

[0042] Step S11: the collected.wav format sound wave sequence is quickly converted into a spectrogram image; wherein, the sound collecting experiment of the existing battery sample is repeatedly carried out in the sliding pipe 3, and the discharge audio is obtained to construct a sample library;

[0043] Step S12: wherein, the sound signal audio of different types of batteries (cylindrical, square shell and soft package) is recorded in the sliding pipe 3, based on the principle of battery and sliding pipe friction vibration sound generation, an experimental platform is built, and the sound signal of different types of batteries (cylindrical, square shell and soft package) is collected in the pipe; and the collected discharge audio is preprocessed, the preprocessing includes pre-emphasis, frame windowing, endpoint detection and filtering denoising, the power frequency noise is removed, the discharge characteristics are highlighted, and the audio quality is improved;

[0044] Step S13: through time-frequency analysis of the discharge sound signal, the related statistical indicators are extracted to represent the sound change characteristics, the different types of batteries are associated with the friction sound prints, and the related indicators are extracted to represent the different types of batteries; the sound signal feature extraction method of the spectrogram is adopted, the spectrogram is selected to extract more complete short-time frequency, energy distribution and other characteristics, the spectrogram fast feature extraction algorithm is completed, the spectrogram is batch generated, the audio and spectrogram sample library of different types of batteries moving in the sliding pipe 3 is established, and data is prepared for the neural network training;

[0045] Step S2: the controller controls the interval adjusting motor to adjust the size of the screen grid 12 according to the sound signal frequency collected by the sound collecting module 2; when the sound signal frequency is low, at this time, the retired power battery passing through the sliding pipe 3 is less, the controller controls the screen grid 12 to become larger, so that larger batteries can pass into the sliding pipe 3, and the retired power battery of a certain specification is screened out by the vibration motor vibrating the screening plate 1; according to the sound of the batteries of different specifications sliding in the sliding pipe, the sound signal is collected by the sound collecting module 2 and input into the controller; the collected sound signal is distinguished according to the audio classifier model in the controller, if there is a mixed situation of the sound signal, that is, batteries of different specifications enter the sliding pipe 3, then the mixed specification batteries are transported to the screening plate 1 for re-sorting by the conveying belt mechanism 11, and the screen grid 12 is controlled by the controller to become smaller so that the larger specification batteries cannot pass through the sliding pipe 3; if there is no mixed situation of the sound signal, the controller controls the sorting mechanism to sort the retired power battery passing through the dropping cylinder 5.

[0046] Compared with the prior art, the controller of the present application controls the interval adjusting motor to adjust the size of the flexible screen grid 12 according to the sound signal frequency collected by the sound collecting module 2; when the sound signal frequency is low, at this time, the retired power battery passing through the sliding pipe 3 is less, the controller controls the screen grid 12 to become larger, so that larger batteries can pass into the sliding pipe 3, and the retired power battery of a certain specification is screened out by the vibration motor vibrating the screening plate 1; according to the sound of the batteries of different specifications sliding in the sliding pipe, the sound signal is collected by the sound collecting module 2 and input into the controller; the collected sound signal is distinguished according to the audio classifier model in the controller, if there is a mixed situation of the signal, that is, batteries of different specifications enter the sliding pipe, then the mixed specification batteries are transported to the screening plate 1 for re-sorting by the conveying belt mechanism 11, and the screen grid 12 is controlled by the controller to become smaller so that the larger specification batteries cannot pass through the sliding pipe; if there is no mixed situation of the signal, the controller controls the sorting mechanism to sort the retired power battery passing through the dropping cylinder 5.

[0047] The present application can sort or re-sort according to the mixed situation of the sound signal, greatly improving the accuracy and efficiency of sorting, and realizing efficient, accurate and low-cost automatic identification and sorting of retired power batteries.

[0048] The present application can sort or re-sort according to the mixed situation of the sound signal, greatly improving the accuracy and efficiency of sorting, and realizing efficient, accurate and low-cost automatic identification and sorting of retired power batteries. The present application can sort or re-sort according to the mixed situation of the sound signal, greatly improving the accuracy and efficiency of sorting, and realizing efficient, accurate and low-cost automatic identification and sorting of retired power batteries.

[0049] The above embodiments are illustrative of the present application and are not limiting of the present application. It is understood that numerous modifications, changes, substitutions, and alterations can be undertaken by one having ordinary skill in the art without departing from the spirit and scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A retired power battery sorting device based on an audio classifier model, comprising a screening plate, a sound collection module, a sliding pipeline, a bifurcated pipeline, a feeding cylinder, a sorting cavity, a flexible pipeline device, a conveyor belt mechanism, a rod type flexible screen, a controller, characterized in that: The lower end of the screening plate is connected with the flexible pipeline device, the lower end of the flexible pipeline device is connected with a sliding pipeline, a sound collecting module is mounted on the outer peripheral wall of the sliding pipeline, the bottom end of the sliding pipeline is provided with a bifurcated pipeline, the bifurcated pipeline is provided with a re-sorting gate, the lower end of the first pipe opening of the bifurcated pipeline is provided with a dropping cylinder, the lower end of the dropping cylinder is provided with a sorting cavity, the side of the second pipe opening of the bifurcated pipeline is provided with a conveying belt mechanism, a rod type flexible screen is arranged on the screening plate, The size of the screen grid of the rod type flexible screen can be adjusted by the pitch adjusting motor, and the controller controls the pitch adjusting motor to adjust the size of the screen grid according to the sound signal frequency collected by the sound collecting module, so as to screen out a certain specification of the retired power battery; The controller controls the pitch adjusting motor of the rod type flexible screen to adjust the pitch of each rod of the rod type flexible screen, so as to control the size of the screen grid, and the retired power battery of a certain specification is screened out by the vibration motor of the screen, and falls into the flexible pipeline of the flexible pipeline device; When the sound signal collected by the sound collecting module is mixed, that is, different specifications of the retired power battery enter the sliding pipeline, the controller controls the re-sorting gate to close the main sorting pipeline leading to the dropping cylinder and open the re-sorting pipeline leading to the conveying belt mechanism, so that the retired power battery falls on the conveying belt mechanism and is conveyed to the screening plate for re-sorting; When the signal collected by the sound collecting module is not mixed, the controller controls the re-sorting gate to close the re-sorting pipeline leading to the conveying belt mechanism and open the main sorting pipeline leading to the dropping cylinder, so that the retired power battery falls into the dropping cylinder and is sorted subsequently; When the retired power battery falls from the sliding pipeline, it falls into the dropping cylinder, the controller distinguishes which type of battery according to the sound signal collected by the sound collecting module, controls the sorting cavity driving motor to rotate the sorting cavity to align the corresponding sorting cavity with the dropping cylinder, and controls the flap door driving motor to drive the flap door to open, so that the retired power battery falls into the corresponding sorting cavity.

2. The retired power battery sorting device based on an audio classifier model of claim 1, wherein, The flexible pipeline device comprises a flexible pipeline, an adjusting spring and a flexible pipeline driving motor, the upper end of the sliding pipeline is provided with the flexible pipeline, the outer peripheral side of the flexible pipeline is connected with the shell of the flexible pipeline device through a plurality of adjusting springs and the flexible pipeline driving motor, the flexible pipeline driving motor is drivingly connected with the adjusting spring, and the caliber size of the flexible pipeline can be adjusted by adjusting the contraction and stretching of the adjusting spring through the forward and reverse rotation of the flexible pipeline driving motor.

3. The retired power battery sorting device based on an audio classifier model of claim 2, wherein, The first pipe opening of the bifurcated pipeline is connected to the dropping cylinder, the bottom of the dropping cylinder is provided with a flap door, the flap door is connected with a flap door driving motor, the flap door driving motor is arranged above the sorting cavity, and the flap door driving motor is used for driving the flap door to open / close; the lower end of the sorting cavity is provided with a sorting cavity driving motor, and the sorting cavity driving motor is used for driving the sorting cavity to rotate; the sliding pipeline is a circumferentially closed pipeline, which can better collect the sound of the battery sliding in the sliding pipeline and reduce external interference. The sound collecting module is close to the outer wall of the sliding pipe, one end of the bifurcated pipe at the end of the sliding pipe leads to the dropping cylinder, and the other end leads to the conveying belt mechanism, and a re-sorting gate is arranged at the bifurcation of the bifurcated pipe.

4. The retired power battery sorting device based on an audio classifier model of claim 3, wherein, The sorting cavity is cylindrical and is composed of three 1 / 3 cylindrical cavities for classifying three types of batteries, namely square, cylindrical and soft package, a sorting cavity driving motor arranged below the sorting cavity is used to rotate the sorting cavity, the dropping cylinder is in the shape of a quadrangular frustum of a pyramid, and the controller is electrically connected with the sound collecting module and each power component.

5. The retired power battery sorting device based on an audio classifier model of claim 4, wherein, The scalable retired power battery sorting system is formed by closely connecting multiple screening plates in a splicable structure, and can be applied to the sorting of retired power batteries of various scales.

6. A sorting method of a retired power battery sorting device based on an audio classifier model, comprising the retired power battery sorting device based on the audio classifier model according to claim 4, and comprising the following steps: Step S1: The audio classifier model in the controller is realized based on a neural network, can quickly convert the sound signal into a spectrogram, and realizes rapid identification of the type of the retired power battery; Step S2: The controller controls the interval adjusting motor to adjust the size of the screen grid according to the sound signal frequency collected by the sound collecting module; when the sound signal frequency is low, the retired power batteries passing through the sliding pipe are few, the controller controls the screen grid to be large, so that larger batteries can pass into the sliding pipe, and a certain specification of retired power batteries is screened out by the vibration motor vibrating the screening plate; the sound collecting module collects sound signals according to the sound of different specifications of batteries sliding in the sliding pipe, and inputs the sound signals into the controller; the audio classifier model in the controller discriminates the collected sound signals, if there are mixed sound signals, that is, different specifications of batteries enter the sliding pipe, the mixed specification batteries are transported to the screening plate for re-sorting by the conveying belt mechanism, and the screen grid is controlled to be small by the controller so that larger batteries cannot pass through the sliding pipe; if there are no mixed sound signals, the controller controls the sorting mechanism to sort the retired power batteries through the dropping cylinder.

7. The sorting method of claim 6, wherein, The step S1 comprises: Step S11: rapidly converting the collected.wav format sound wave sequence into a spectrogram image; wherein, the sound collecting experiment of the sliding pipe is repeatedly performed on the existing battery sample, and the discharge audio sample library is obtained; Step S12: wherein, the sound signal audio of different types of batteries rubbing in the sliding pipe is recorded respectively, based on the principle of battery and sliding pipe rubbing vibration sound generation, an experimental platform is built, and the sound signal of different types of batteries rubbing in the pipe is collected; and the collected discharge audio is preprocessed, the preprocessing includes pre-emphasis, frame windowing, endpoint detection and filter denoising, removes the power frequency noise, highlights the discharge characteristics, and improves the audio quality; Step S13: By time-frequency analysis of the discharge sound signal, the relevant statistical indicators are extracted to represent the sound change characteristics, and the different types of batteries are associated with their friction sound prints. The sound spectrum sound signal feature extraction method is used to extract more complete short-time frequency and energy distribution characteristics. The sound spectrum fast feature extraction algorithm is completed, and the sound spectrum is batch generated. The audio and sound spectrum sample library of different types of batteries moving in the sliding pipe is established to prepare data for the subsequent neural network training.

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