CN117805025A

CN117805025A - Appearance detection system and detection method for battery cell

Info

Publication number: CN117805025A
Application number: CN202410226842.2A
Authority: CN
Inventors: 屠银行; 朱金平; 刘义
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-02-29
Filing date: 2024-02-29
Publication date: 2024-04-02

Abstract

The application discloses outward appearance detecting system and method of electric core, the system includes: the driving device is used for driving the target battery cell to rotate; the image acquisition equipment is used for acquiring images of the target positions of the target battery cells, obtaining a plurality of battery cell images corresponding to the target battery cells and sending the battery cell images to the upper computer; the upper computer is used for generating a target cell image of the target cell based on the plurality of cell images, detecting the target cell image, obtaining an appearance detection result of the target cell and sending the appearance detection result to the control equipment; the control equipment is used for moving the target battery cell to the next working procedure through a normal blanking pull belt under the condition that the appearance of the received appearance detection result represents that the appearance of the target battery cell is not abnormal; and under the condition that the received appearance detection result represents that the appearance of the target battery cell is abnormal, the target battery cell is moved to a poor battery cell throwing field through an abnormal blanking pull belt. According to the technical scheme, the accuracy in detecting the appearance of the battery cell can be improved.

Description

Appearance detection system and detection method for battery cell

Technical Field

The application relates to the technical field of battery production, in particular to an appearance detection system and a detection method of an electric core.

Background

New energy batteries are increasingly used in life and industry, for example, new energy automobiles having a battery mounted therein have been widely used, and in addition, batteries are increasingly used in the field of energy storage and the like.

The battery is obtained after the electric core passes through a plurality of processes, in the lithium battery field, the electric core outward appearance flaw has direct influence to the security that the electric core used, consequently, when producing the electric core, need guarantee the quality of electric core outward appearance, at present, through artifical visual inspection when detecting the outward appearance of electric core, this kind of detection mode efficiency is slower to artifical visual inspection often can have the error, and the accuracy of detection is lower.

Disclosure of Invention

In order to solve the technical problems, an object of the present application is to provide an appearance detection system and a detection method for a battery cell.

The application is realized by the following technical scheme.

A first aspect of the present application provides an appearance detection system for a battery cell, the system comprising: the driving device is used for driving the target battery cell to rotate; and sending an image acquisition signal to image acquisition equipment under the condition that the target battery cell is driven to rotate by a preset angle; the image acquisition equipment is used for responding to the received image acquisition signal, carrying out image acquisition on the target position of the target battery cell, obtaining a plurality of battery cell images corresponding to the target battery cell and sending the battery cell images to the upper computer; the upper computer is used for responding to the received multiple battery cell images, generating a target battery cell image of the target battery cell based on the multiple battery cell images, detecting the target battery cell image, obtaining an appearance detection result of the target battery cell and sending the appearance detection result to the control equipment; the control equipment is used for moving the target battery cell to the next procedure through a normal blanking pull belt under the condition that the appearance of the target battery cell is not abnormal represented by the received appearance detection result; the control equipment is also used for moving the target battery cell to a poor battery cell throwing field through an abnormal blanking pull belt under the condition that the appearance of the target battery cell is abnormal as represented by the received appearance detection result.

Based on this, this application is rotated through setting up drive arrangement drive target electric core, then utilize image acquisition equipment to gather the image of target electric core target position at the rotatory in-process of target electric core, can gather the complete image of target electric core in target position department, finally carry out outward appearance detection through the host computer to the complete image that gathers, control equipment confirms the electric core flow direction of target electric core based on outward appearance testing result, the technical scheme that this application provided utilizes the target position department to carry out image acquisition to target electric core, and then carry out image detection's mode to the image and obtain the outward appearance testing result of target electric core, compared in prior art, the misjudgement condition that has avoided artifical visual inspection to exist appears, the detection efficiency of electric core outward appearance detection has been improved simultaneously.

In some embodiments of the present application, the target position is a step surface of the target battery cell, the driving device is a first driving device, and the image acquisition device is a first image acquisition device; wherein: the first driving device is used for responding to the received first detection starting signal and driving the target battery cell to rotate in situ for at least one circle by taking the center of the target battery cell as an axis; and sending the image acquisition signal to the first image acquisition device under the condition that the target battery cell is driven to rotate by a preset angle; the first image acquisition equipment is used for acquiring a step surface image of the target battery cell under the condition that the image acquisition signal is received, obtaining a plurality of step surface images corresponding to the target battery cell and sending the step surface images to the upper computer; the first image acquisition equipment is located at a first position above the target battery cell, and an included angle with a preset angle exists between the first image acquisition equipment and the center of the target battery cell.

Based on this, this application carries out image acquisition through dividing the outward appearance of target electric core to the step face of target electric core earlier, and then carries out the outward appearance testing result to the step face through the image of step face, can be more accurate obtain the testing result of target electric core in different positions, and then guaranteed the production quality in the electric core production process.

In some embodiments of the present application, the target position is a cylindrical surface of the target battery cell, the driving device is a second driving device, and the image acquisition device is a second image acquisition device; wherein: the second driving device is used for responding to the received second detection starting signal and driving the target battery cell to rotate in situ for at least one circle by taking the center of the target battery cell as an axis; and sending the image acquisition signal to the second image acquisition equipment under the condition that the target battery cell is driven to rotate by a preset angle; the second image acquisition equipment is used for acquiring a cylindrical surface image of the target battery cell under the condition that the image acquisition signal is received, obtaining a plurality of cylindrical surface images corresponding to the target battery cell and sending the cylindrical surface images to the upper computer; the second image acquisition equipment is located at a second position right above the target battery cell.

Based on this, this application is through dividing the outward appearance of target electric core, carries out image acquisition to the step face of target electric core earlier, then carries out image acquisition to the face of cylinder of target electric core, and then carries out the outward appearance testing result to the face of cylinder through the image of face of cylinder, can be more accurate obtain the testing result of target electric core in different positions, and then guaranteed the production quality in the electric core production process.

In some embodiments of the present application, the upper computer is further configured to generate, in response to the received multiple step surface images, a target step surface image of the target cell based on the multiple step surface images; detecting the target step surface image to obtain a step surface detection result of the target battery cell; the upper computer is also used for responding to the received multiple cylindrical surface images and generating a target cylindrical surface image of the target battery cell based on the multiple cylindrical surface images; detecting the target cylindrical surface image to obtain a cylindrical surface detection result of the target battery cell; the upper computer is further configured to send a first appearance detection result to the control device if the step surface detection result and the cylindrical surface detection result both indicate that no abnormality occurs in the target battery cell; if at least one of the step surface detection result and the cylindrical surface detection result shows that the target battery cell is abnormal, a second appearance detection result is sent to the control equipment; wherein the appearance detection result includes the first appearance detection result and the second appearance detection result.

Based on the method, only when the appearance detection results of the step surface and the cylindrical surface of the target battery cell are not abnormal, the target battery cell can be detected through the appearance, the accuracy of appearance detection of the battery cell is improved, and the production quality in the battery cell production process is further guaranteed.

In some embodiments of the present application, the upper computer is further configured to detect whether the target cylindrical surface image includes at least two cell codes or two blue glue seams when the target cylindrical surface image is generated based on the plurality of cylindrical surface images; if the target cylindrical surface image comprises the at least two cell codes or the two blue glue joint lines, detecting the target cylindrical surface image; and the upper computer is further used for sending an image abnormality detection result to the control equipment if the target cylindrical surface image does not comprise the at least two cell codes or the two blue glue joints.

Based on the method, before appearance detection is carried out on the target cylindrical surface image, whether the target cylindrical surface image is complete needs to be determined, and only under the condition that the target cylindrical surface image is complete, the appearance detection result is accurate, so that the accuracy of appearance detection on the battery cell is further improved, and the production quality in the battery cell production process is further ensured.

In some embodiments of the present application, the system further comprises a transfer device; wherein: the control device is used for sending a first instruction to the transfer device when the first appearance detection result is received, and sending a second instruction to the transfer device when the second appearance detection result or the image abnormality detection result is received; the transferring equipment is used for responding to the received first instruction and transferring the target battery cell to a normal blanking pull belt so that the normal blanking pull belt can move the target battery cell to the next procedure; and the transferring equipment is used for responding to the received second instruction, transferring the target battery cell into an abnormal discharging pull belt, and enabling the abnormal discharging pull belt to move the target battery cell into a poor battery cell throwing field.

Based on the method, only the target battery cell passing through the appearance detection can be transported to the next process, so that the production quality in the battery cell production process is ensured.

In some embodiments of the present application, the system further comprises: the sensor is used for sending a first electric core in-place signal to the control equipment under the condition that the target electric core is detected to reach the step surface detection position; the control equipment is also used for responding to the received first cell in-place signal and sending a first detection start signal to a first driving device; the sensor is further used for sending a second cell in-place signal to the control equipment under the condition that the target cell is detected to reach the cylindrical surface detection position; the control device is further configured to send a second detection start signal to a second driving device in response to the received second core in-place signal.

In some embodiments of the present application, the image capturing device is a 3D line laser camera, and the preset angle is determined according to a resolution of the 3D line laser camera.

Based on the method, the 3D line laser camera is adopted for image acquisition, so that the acquired image of the target battery cell is more accurate, and the accuracy of appearance detection of the battery cell is improved.

A second aspect of the present application provides a battery production line, including production equipment, transfer equipment and the appearance detection system of the electric core of any one of the first aspect, the production equipment is used for producing the target electric core, the transfer equipment is used for taking out the target electric core from the production equipment and placing in the appearance detection system of the electric core, or taking out the target electric core that will accomplish the detection from the appearance detection system of the electric core and transferring to a target station.

The third aspect of the application provides an appearance detection method of a battery cell, which is applied to an appearance detection system of the battery cell, wherein the system comprises a driving device, image acquisition equipment, an upper computer and control equipment; wherein: the driving device drives the target battery cell to rotate; and sending an image acquisition signal to the image acquisition equipment under the condition that the target battery cell is driven to rotate by a preset angle; the image acquisition equipment responds to the received image acquisition signal, performs image acquisition on the target position of the target battery cell, obtains a plurality of battery cell images corresponding to the target battery cell and sends the battery cell images to the upper computer; the upper computer responds to the received multiple battery cell images, generates a target battery cell image of the target battery cell based on the multiple battery cell images, detects the target battery cell image, obtains an appearance detection result of the target battery cell and sends the appearance detection result to the control equipment; the control equipment moves the target battery cell to the next procedure through a normal blanking drawstring under the condition that the appearance of the target battery cell is represented by the received appearance detection result and is not abnormal; and the control equipment moves the target battery cell to a poor battery cell throwing field through an abnormal blanking pull belt under the condition that the appearance of the received appearance detection result represents that the appearance of the target battery cell is abnormal.

According to the method, the driving device is arranged to drive the target battery cell to rotate, then the image acquisition device is used for acquiring the image of the target position of the target battery cell in the rotating process of the target battery cell, the complete image of the target battery cell at the target position can be acquired, finally the appearance detection is carried out on the acquired complete image through the upper computer, the battery cell turning direction of the target battery cell is determined by the control device based on the appearance detection result, the appearance detection result of the target battery cell is obtained by utilizing the mode of carrying out image acquisition on the target position of the target battery cell and then carrying out image detection on the image, and compared with the prior art, the false judgment condition existing in manual visual inspection is avoided, and meanwhile the detection efficiency of the appearance detection of the battery cell is improved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

fig. 1 is a schematic diagram of a system for detecting the appearance of a battery cell according to an embodiment of the present application;

Fig. 2 is a schematic diagram of an appearance composition of an exemplary target cell according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram illustrating a relative position between a first image capturing device and a target battery cell according to an embodiment of the present application;

fig. 4 is a second schematic diagram of a relative position between an exemplary first image capturing device and a target battery cell according to an embodiment of the present application;

fig. 5 is a schematic diagram of a relative position between an exemplary second image capturing device and a target battery cell according to an embodiment of the present application;

FIG. 6 is a schematic view of an exemplary partial step surface image provided in an embodiment of the present application;

FIG. 7 is a schematic view of an exemplary partial cylindrical image provided in an embodiment of the present application;

fig. 8 is a schematic diagram of an exemplary appearance detection system of a battery cell according to an embodiment of the present application;

fig. 9 is a second schematic diagram of a composition of an appearance detection system of an exemplary battery cell according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram of an appearance detection flow of an exemplary battery cell according to an embodiment of the present application;

fig. 11 is a flow chart of an appearance detection method of a battery cell according to an embodiment of the present application.

Description of the reference numerals

0-appearance detection system of the battery cell; 1-a driving device; 2-an image acquisition device; 3-an upper computer; 4-a control device; 5-step surface; 6-a cylindrical surface; 7-a first image acquisition device; 8-a target cell; 9-a central axis; 10-a second image acquisition device; 11-a transfer device; 12-a sensor; 13-a first drive; 14-a second drive means.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, 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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the present application and in the description of the drawings above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," "third," etc. are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are orientation or positional relationship based on the drawings, and are merely for convenience of describing the embodiments of the present application and simplifying the description, and are not indicative or implying that the apparatus or element referred to must have a specific orientation, be configured, operated, or used in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the term "contact" is to be understood in a broad sense as either direct contact or contact across an intermediate layer, as either contact with substantially no interaction force between the two in contact or contact with interaction force between the two in contact.

The present application will be described in detail below.

The battery cell is an important part of the battery, and the application of the new energy battery in life and industry is more and more widespread, for example, a new energy automobile with the battery is widely used, and in addition, the battery is increasingly applied to the energy storage field and the like.

At present, new energy batteries are increasingly widely applied to life and industry. The new energy battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and a plurality of fields such as aerospace. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding. In the embodiment of the disclosure, the battery may be a battery cell. The battery cell is a basic unit capable of realizing the mutual conversion of chemical energy and electric energy, and can be used for manufacturing a battery module or a battery pack so as to supply power to an electric device. The battery cell may be a secondary battery, which means a battery cell that can be continuously used by activating an active material in a charging manner after the battery cell is discharged. The battery cell may be a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which the embodiments of the present disclosure are not limited to.

At present, when the appearance of the battery cell is detected, the detection mode is low in efficiency through manual visual detection, errors often exist in the manual visual detection, and the detection accuracy is low.

Based on the above-mentioned problems, the present application proposes an appearance detection system 0 of a battery cell, referring to fig. 1, the appearance detection system 0 of a battery cell includes: the driving device 1 is used for driving the target battery cell to rotate; and sending an image acquisition signal to the image acquisition device 2 under the condition that each driving target cell rotates by a preset angle; the image acquisition equipment 2 is used for responding to the received image acquisition signals, carrying out image acquisition on the target position of the target battery cell, obtaining a plurality of battery cell images corresponding to the target battery cell and sending the battery cell images to the upper computer 3; the upper computer 3 is used for responding to the received multiple battery cell images, generating a target battery cell image of the target battery cell based on the multiple battery cell images, detecting the target battery cell image, obtaining an appearance detection result of the target battery cell and sending the appearance detection result to the control equipment 4; the control device 4 is used for moving the target battery cell to the next procedure through a normal blanking pull belt under the condition that the received appearance detection result represents that the appearance of the target battery cell is not abnormal; and the control equipment 4 is also used for moving the target battery cell to the poor battery cell throwing field through the abnormal blanking pull belt under the condition that the received appearance detection result represents that the appearance of the target battery cell is abnormal.

It should be noted that, in the embodiment of the present application, the driving device 1 is a driven wheel encoder, and is configured to drive the target battery cell to gradually rotate according to a preset angle; the specific driving device 1 may be selected according to practical situations, and the embodiment of the present application is not specifically limited herein.

In an alternative embodiment of the present application, the image capturing device 2 is a three-dimensional (3D) line laser camera, and the preset angle is determined according to the resolution of the 3D line laser camera.

It should be noted that, in this embodiment of the present application, since the image capturing device 2 is a 3D line laser camera, when the image capturing device 2 captures an image of a target position of a target electric core, only one line of image can be captured at a time, so that the target electric core rotates by a preset angle each time, that is, one line of image is captured, then the target electric core is driven to rotate by a preset angle, the image capturing device 2 captures one line of image again, and finally all the obtained line of image needs to be spliced to obtain an image of a complete target position; the specific image capturing device 2 may be selected according to practical situations, or may be a 3D point laser camera or a 3D plane laser camera, which is not specifically limited herein.

In the embodiment of the present application, the control device 4 is a device that can issue a control instruction, for example, a programmable logic controller (Programmable Logic Controller, PLC); the specific control device 4 may be selected according to practical situations, and the embodiment of the present application is not specifically limited herein.

Specifically, after each driving target cell rotates by a preset angle, the driving device sends an image acquisition signal to the image acquisition device 2, the image acquisition device 2 acquires images of target positions of the target cells after each receiving the image acquisition signal, then the driving device drives the target cell to continue to rotate again by a preset angle based on the current position, an image acquisition signal is sent to the image acquisition device 2 again, the image acquisition device 2 carries out image acquisition on the target positions of the target cells again after receiving the image acquisition signal until the total angle of rotation of the target cell driven by the driving device reaches a preset rotation angle threshold value to stop, at this time, the image acquisition device 2 acquires a plurality of cell images, the image acquisition device 2 sends the acquired plurality of cell images to the upper computer 3, finally, the upper computer 3 generates the target cell images based on the plurality of cell images and then detects the target cell images, appearance detection results of the target cells are sent to the control device 4, and the control device 4 determines that the target cells are transferred to a normal blanking belt or a non-blanking belt according to the appearance detection results.

It should be noted that, in the embodiment of the present application, the preset rotation angle threshold may be set to 540 °, which is to be understood as requiring that the target cell rotates more than one revolution; the specific preset rotation angle threshold may be specified according to practical situations, and the embodiment of the present application is not specifically limited herein.

In an alternative embodiment of the present application, the target position is a step surface of the target battery cell, the driving device 1 is a first driving device, and the image acquisition device 2 is a first image acquisition device; wherein: the first driving device is used for responding to the received first detection starting signal and driving the target battery cell to rotate at least one circle in situ by taking the center of the target battery cell as an axis; transmitting an image acquisition signal to the first image acquisition device under the condition that each driving target cell rotates by a preset angle; the first image acquisition equipment is used for acquiring a step surface image of one target cell under the condition of receiving an image acquisition signal, obtaining a plurality of step surface images corresponding to the target cell and sending the step surface images to the upper computer 3; the first image acquisition equipment is located at a first position above the target battery cell, and an included angle with the center of the target battery cell is formed by the first image acquisition equipment and a preset angle.

In the embodiment of the present application, as shown in fig. 2, the appearance of the target cell includes a step surface 5 and a cylindrical surface 6, and the target position is the step surface 5 or the cylindrical surface 6; the step surface 5 is the surface of the battery cell explosion-proof valve arranged on the target battery cell, and the cylindrical surface 6 is the side surface of the target battery cell; the specific target location may be specified according to practical situations, and embodiments of the present application are not specifically limited herein.

Specifically, when the first driving device receives the first detection start signal, the first driving device starts to drive the target battery cell to rotate in place by at least one circle with the center of the target battery cell as an axis, usually 540 °, after the first driving device drives the target battery cell to rotate by a preset angle, the first driving device sends an image acquisition signal to the first image acquisition device, when the step surface 5 of the target battery cell is acquired, the first image acquisition device is used as the first image acquisition device, at this time, the first image acquisition device is located at a first position above the target battery cell, and meanwhile, an included angle of the preset angle exists between the first image acquisition device and the center of the target battery cell, after the first image acquisition device receives the image acquisition signal, the first image acquisition device performs image acquisition on the step surface 5 of the target battery cell until the target battery cell rotates by 540 °, and sends a plurality of step surface images to the upper computer 3.

For example, referring to fig. 2, since the step surface 5 has a plurality of step surfaces, the first image capturing device needs to have an included angle with the center of the target cell, so that a complete step surface image corresponding to the step surface 5 can be obtained, based on this, referring to fig. 3, the first image capturing device 7 is disposed at a first position above the target cell 8, and referring to fig. 4, while referring to fig. 4, the relative position of the first image capturing device 7 and the target cell 8 is viewed from another view angle, it can be seen from fig. 4 that the first image capturing device 7 has an included angle with the center axis 9 of the target cell 8, where the first position may be 60±10mm from the target cell 8, and the preset angle may be 15 ° or 20 °; the specific first position and the preset angle may be set according to actual settings, and the embodiments of the present application are not specifically limited herein.

In an alternative embodiment of the present application, the target position is a cylindrical surface of the target battery cell, the driving device is a second driving device, and the image acquisition device is a second image acquisition device; wherein: the second driving device is used for responding to the received second detection starting signal and driving the target battery cell to rotate at least one circle in situ by taking the center of the target battery cell as an axis; transmitting an image acquisition signal to the second image acquisition equipment under the condition that each driving target cell rotates by a preset angle; the second image acquisition equipment is used for acquiring cylindrical surface images of one target cell under the condition of receiving image acquisition signals, obtaining a plurality of cylindrical surface images corresponding to the target cell and sending the cylindrical surface images to the upper computer; the second image acquisition device is located at a second position right above the target battery cell.

Specifically, the second driving device starts to drive the target battery cell to rotate in place by at least one circle, usually 540 °, with the center of the target battery cell as an axis under the condition that the second detection start signal is received, the second driving device sends an image acquisition signal to the second image acquisition device after driving the target battery cell to rotate by a preset angle, when the cylindrical surface 6 of the target battery cell is acquired, the second image acquisition device is used, at this time, the second image acquisition device is located at a second position right above the target battery cell, after receiving the image acquisition signal, the second image acquisition device performs image acquisition on the cylindrical surface 6 of the target battery cell until the target battery cell rotates by 540 °, and sends a plurality of cylindrical surface images to the upper computer 3.

Illustratively, referring to fig. 5, the second image acquisition device 10 is disposed at a second location above the target cell 8, which may be 80±20mm from the center point of the target cell 8; the specific second position may be set according to actual settings, and embodiments of the present application are not specifically limited herein.

In an optional embodiment of the present application, the upper computer 3 is further configured to generate, in response to the received multiple step surface images, a target step surface image of the target cell based on the multiple step surface images; detecting the target step surface image to obtain a step surface detection result of the target battery cell; the upper computer 3 is also used for responding to the received multiple cylindrical surface images and generating a target cylindrical surface image of the target battery cell based on the multiple cylindrical surface images; detecting the target cylindrical surface image to obtain a cylindrical surface detection result of the target battery cell; the upper computer 3 is further configured to send a first appearance detection result to the control device 4 if the step surface detection result and the cylindrical surface detection result both indicate that the target battery core is not abnormal; if at least one of the step surface detection result and the cylindrical surface detection result shows that the target battery cell is abnormal, a second appearance detection result is sent to the control equipment 4; wherein the appearance detection result includes a first appearance detection result and a second appearance detection result.

Specifically, after receiving the multiple step surface images sent by the first image acquisition device, the upper computer 3 acquires one line of image on the step surface each time because the first image acquisition device is a 3D line laser camera, based on the image, the upper computer 3 needs to splice the multiple step surface images to obtain a complete target step surface image of the target battery cell, and then the upper computer 3 detects the target step surface image to identify whether the appearance of the step surface is abnormal or not, so as to obtain a step surface detection result; correspondingly, after the upper computer 3 receives the multiple cylindrical surface images sent by the second image acquisition equipment, the second image acquisition equipment is also a 3D line laser camera, so that the second image acquisition equipment acquires an image of one line on the cylindrical surface each time, based on the image, the upper computer 3 needs to splice the multiple cylindrical surface images to obtain a complete target cylindrical surface image of the target battery cell, then the upper computer 3 detects the target cylindrical surface image, and identifies whether the appearance of the cylindrical surface is abnormal or not, so as to obtain a cylindrical surface detection result.

Specifically, after the step surface detection result and the cylindrical surface detection result of the target battery cell are obtained, if the step surface detection result and the cylindrical surface detection result both indicate that no abnormality occurs in the step surface and the cylindrical surface of the target battery cell, the upper computer 3 indicates that the target battery cell passes the appearance detection, and the upper computer 3 sends a first appearance detection result to the control device 4; if at least one of the step surface detection result and the cylindrical surface detection result indicates that the step surface and/or the cylindrical surface of the target battery cell are abnormal, the target battery cell is not detected by the appearance, and the upper computer 3 sends a second appearance detection result to the control equipment 4.

For example, referring to fig. 6, a part of step surface images in an exemplary target step surface image is detected, and the first mark 11 in fig. 6 indicates that plastic breakage occurs at the position, and at this time, the step surface detection result is that the step surface of the target cell is abnormal; similarly, referring to fig. 7, a partial cylindrical surface image in an exemplary target cylindrical surface image is detected, and in fig. 7, the second mark 12 and the third mark 13 indicate that plastic breakage occurs at this point, and then the cylindrical surface detection result is that the target cell cylindrical surface is abnormal.

In an optional embodiment of the present application, the upper computer 3 is further configured to detect whether at least two electric core codes or two blue glue seams are included in the target cylindrical surface image in the case of generating the target cylindrical surface image based on the multiple cylindrical surface images; if the target cylindrical surface image comprises at least two cell codes or two blue-joint lines, detecting the target cylindrical surface image; the upper computer 3 is further configured to send an image anomaly detection result to the control device 4 if the target cylindrical surface image does not include at least two cell codes or two blue glue lines.

It should be noted that, in this embodiment of the present application, since the top and bottom positions of the target battery cell can only be fixed for rotation to take a picture in the process of detecting the cylindrical surface of the target battery cell, and the top and bottom surfaces of the target battery cell are required for pressure limitation, the problem of image taking and line loss caused by relative sliding between the motor and the target battery cell can exist in the rotation process of the target battery cell, which results in that the acquired image cannot cover the complete cylindrical surface of the target battery cell, and causes the problem of flaw killing, therefore, before detecting the target cylindrical surface image, the integrity of the target cylindrical surface image needs to be judged first.

It should be noted that, in the embodiment of the present application, since the battery core code needs to be printed on the side surface of the target battery core when the target battery core is produced, whether the acquired target cylindrical surface image is complete can be determined by detecting whether two battery core codes exist in the target cylindrical surface image; or, as blue glue is uniformly coated on the side surface of the target battery cell when the target battery cell is produced, whether the acquired target cylindrical surface image is complete or not can be judged by detecting whether two blue glue joints exist in the target cylindrical surface image; the specific manner of determining whether the target cylindrical surface image is complete may be determined according to practical situations, and the embodiment of the present application is not specifically limited herein.

It should be noted that, in the embodiment of the present application, the distance between two cell codes or two blue glue lines needs to be between a±0.2mm, where a is the theoretical perimeter of the target cell, and may be determined according to practical situations.

Specifically, the upper computer 3 performs preliminary detection on the target cylindrical surface image under the condition that the target cylindrical surface image is generated based on a plurality of cylindrical surface images sent by the second image acquisition equipment, detects whether the target cylindrical surface image is complete, and if the target cylindrical surface image is detected to include at least two electric core codes or two blue glue joint lines, can perform further appearance detection on the target cylindrical surface image; the upper computer 3 is further configured to send an image anomaly detection result to the control device 4 if the target cylindrical surface image does not include at least two cell codes or two blue glue lines, so that the control device 4 moves the target cell to the NG field based on the image anomaly detection result.

In an alternative embodiment of the present application, referring to fig. 8, the appearance detection system 0 of the battery cell further includes a transfer device 11; wherein: a control device 4 for sending a first instruction to the transferring device 11 in the case of receiving the first appearance detection result, and sending a second instruction to the transferring device 11 in the case of receiving the second appearance detection result or the image abnormality detection result; the transferring device 11 is configured to transfer the target battery cell to a normal blanking pull belt in response to the received first instruction, so that the normal blanking pull belt moves the target battery cell to a next procedure; and the transferring device 11 is used for transferring the target battery cell to the abnormal discharging pull belt in response to the received second instruction so that the abnormal discharging pull belt can move the target battery cell to the poor battery cell throwing field.

It should be noted that, in the embodiment of the present application, the transferring device 11 may be a mechanical/electric clamping jaw, or a robot trolley, for moving the target battery cell; the specific transfer device 11 may be determined according to practical situations, and the embodiment of the present application is not specifically limited herein.

It should be noted that, in the embodiment of the present application, the poor cell placement field is a poor (No Good, NG) field, which is a region storing the poor cell in the battery production process; the specific poor cell placement field may be determined according to practical situations, and the embodiments of the present application are not specifically limited herein.

Specifically, after the upper computer 3 obtains the first appearance detection result or the second appearance detection result, the first appearance detection result or the second appearance detection result is sent to the control device 4, and since the first appearance detection result indicates that the target battery cell passes the appearance detection, the control device 4 sends a first instruction to the transfer device 11 after receiving the first appearance detection result, and the transfer device 11 transfers the target battery cell to the normal blanking pull belt under the condition of receiving the first instruction, so that the normal blanking pull belt moves the target battery cell to the next procedure; because the second appearance detection result indicates that the target cell fails to pass the appearance detection, the control device 4 sends a second instruction to the transfer device 11 after receiving the second appearance detection result, and the transfer device 11 transfers the target cell to the abnormal blanking pull belt under the condition that the second instruction is received, so that the abnormal blanking pull belt moves the target cell to the NG field; meanwhile, if the control device 4 receives the image anomaly detection result, at this time, the collected target cylindrical surface image representing the target cell is incomplete, so the control device 4 also determines that the target cell does not pass the appearance detection, and sends a second instruction to the transfer device 11 to move the target cell to the NG field.

In an alternative embodiment of the present application, referring to fig. 9, the appearance detection system 0 of the battery cell further includes: a sensor 12, configured to send a first cell in-place signal to the control device 4 when it is detected that the target cell reaches the step surface detection position; the control device 4 is further configured to send a first detection start signal to the first driving device in response to the received first core in-place signal; the sensor 12 is further configured to send a second cell in-place signal to the control device 4 when it is detected that the target cell reaches the cylindrical surface detection position; the control device 4 is further configured to send a second detection start signal to the second driving device in response to the received second in-place signal.

Specifically, the sensor 12 located at the step surface detection position on the battery production line sends a first cell in-place signal to the control device 4 when detecting that a target cell reaches the step surface detection position, at this time, the control device 4 sends a first detection start signal to the first driving device in response to the first cell in-place signal, the first driving device starts to drive the target cell to rotate in place with the center of the target cell as an axis when receiving the first detection start signal, and after each driving target cell rotates by a preset angle, sends an image acquisition signal to the first image acquisition device, and the target cell leaves the step surface detection position after the total rotation angle reaches 540 °, as the battery production line moves from the step surface detection position to the cylindrical surface detection position, the sensor 12 located at the cylindrical surface detection position sends a second cell in-place signal to the control device 4 when detecting that a target cell reaches the cylindrical surface detection position, at this time, the control device 4 sends a second detection signal to the second driving device in place with the second cell in response to the second cell in-place signal, the second driving device sends a second detection signal to the second detection device in the second cell in place around the center of the axis, and after the target cell rotates by the preset angle reaches the preset angle, the image acquisition device rotates by the total rotation angle reaches the target cell in the preset angle, at the time of 3, the image acquisition position is reached before the control device rotates the target cell in the total rotation angle reaches the initial position, the target cell in the initial rotation angle reaches the control device, and the image acquisition position is detected by the first rotation angle, and the image acquisition signal is detected at the initial position, and the image acquisition device rotates the second detection position has reached, for the control device 4 to determine the cell turning direction of the target cell according to the appearance detection result, i.e. whether the target cell is allowed to enter the next process.

Based on the above embodiment, referring to fig. 10, the target cell 8 enters the appearance detection station along with the battery production line 13, when reaching the step surface detection position, the first driving device 13 (driven wheel encoder) located at the step surface detection position receives the first detection start signal, starts to drive the target cell 8 to rotate, and sends the image acquisition signal to the first image acquisition device 7 (3D line laser camera), the first image acquisition device 7 performs step surface image acquisition on the target cell 8, after the acquisition is completed, the target cell 8 reaches the cylindrical surface detection position along with the battery production line 13 from the step surface detection position, the second driving device 14 (driven wheel encoder) located at the cylindrical surface detection position receives the second detection start signal, starts to drive the target cell 8 to rotate, and sends the image acquisition signal to the second image acquisition device 10 (3D line laser camera), and after the acquisition is completed, the target cell 8 leaves the appearance detection station along with the battery production line 13, and enters the next station.

The embodiment of the application provides an appearance detection system 0 of a battery cell, which comprises: the driving device 1 is used for driving the target battery cell to rotate; and sending an image acquisition signal to the image acquisition device 2 under the condition that each driving target cell rotates by a preset angle; the image acquisition equipment 2 is used for responding to the received image acquisition signals, carrying out image acquisition on the target position of the target battery cell, obtaining a plurality of battery cell images corresponding to the target battery cell and sending the battery cell images to the upper computer 3; the upper computer 3 is used for responding to the received multiple battery cell images, generating a target battery cell image of the target battery cell based on the multiple battery cell images, detecting the target battery cell image, obtaining an appearance detection result of the target battery cell and sending the appearance detection result to the control equipment 4; the control device 4 is used for moving the target battery cell to the next procedure through a normal blanking pull belt under the condition that the received appearance detection result represents that the appearance of the target battery cell is not abnormal; the control device 4 is further configured to move the target battery cell to the poor battery cell placement field through the abnormal blanking pull belt when the received appearance detection result indicates that the appearance of the target battery cell is abnormal; by adopting the implementation scheme, the target cell is driven to rotate by the driving device, then the image of the target position of the target cell is acquired by the image acquisition equipment in the rotating process of the target cell, the complete image of the target cell at the target position can be acquired, finally the appearance detection is carried out on the acquired complete image through the upper computer, the control equipment determines the cell rotation direction of the target cell based on the appearance detection result, and the technical scheme provided by the application obtains the appearance detection result of the target cell by utilizing the mode of carrying out image acquisition on the target position of the target cell and then carrying out image detection on the image.

In addition, this application embodiment still provides a battery production line, and this battery production line includes outward appearance detecting system 0, production facility and the transportation equipment of electric core, and production facility is used for producing the target electric core, and transportation equipment is used for taking out the target electric core from production facility and placing in the outward appearance detecting system 0 of electric core, or takes out the target electric core of accomplishing the process from the outward appearance detecting system 0 of electric core and transports to the target station.

In this embodiment of the present application, the production device is used for producing the target battery cells, for example, the production device may be an assembly device for assembling the incoming battery cells in the housing, or the production device may be a welding device for connecting multiple target battery cells in the housing, and according to different process sequences, the production device may have multiple possible forms.

In this application embodiment, the transfer equipment has multiple possible forms, for example, the transfer equipment is the conveyer belt, and conveyer belt simple structure, and transport efficiency is high, and for example, the transfer equipment is arm type robot, and arm type robot can realize more complicated operation.

In this embodiment of the present application, the target station may be a station for assembling the target battery cell, specifically, the cover plate in the casing is not installed before the test, and the welded target battery cell is transferred to the target position by the transfer device for installing the cover plate; for another example, the target station is a test station, such as vibration test, high temperature test, etc.; for another example, the target station is a recovery station, and the transfer device transfers the target cell to the recovery station when the target cell fails.

Based on the above embodiments, in another embodiment of the present application, there is provided an appearance detection method of a battery cell, which is applied to an appearance detection system 0 of the battery cell, referring to fig. 1, the appearance detection system 0 of the battery cell includes: fig. 11 is a schematic flow chart of an appearance detection method of a battery cell provided in the embodiment of the present application, and the specific method includes steps S101 to S104 as follows:

step S101, a driving device drives a target battery cell to rotate; and sending an image acquisition signal to the image acquisition device under the condition that each driving target cell rotates by a preset angle.

In the embodiment of the application, the driving device 1 drives the target battery cell to rotate; and transmits an image acquisition signal to the image acquisition device 2 in the case of rotating the target cell by a preset angle every time.

In the embodiment of the present application, the driving device 1 drives the target cell to rotate when receiving a detection start signal, and the detection start signal is transmitted to the driving device 1 when the control apparatus 4 detects that the target cell reaches the detection position.

Step S102, the image acquisition equipment responds to the received image acquisition signals to acquire images of the target positions of the target battery cells, and a plurality of battery cell images corresponding to the target battery cells are obtained and sent to the upper computer.

In the embodiment of the present application, the image acquisition device 2 performs image acquisition on the target position of the target battery cell under the condition of receiving the image acquisition signal, so as to obtain a plurality of battery cell images corresponding to the target battery cell, and send the battery cell images to the upper computer 3.

Step S103, the upper computer responds to the received multiple battery cell images, generates a target battery cell image of the target battery cell based on the multiple battery cell images, detects the target battery cell image, obtains an appearance detection result of the target battery cell, and sends the appearance detection result to the control equipment.

In this embodiment of the present application, when receiving the plurality of battery cell images sent by the image acquisition device 2, the upper computer 3 generates a target battery cell image of the target battery cell based on the plurality of battery cell images, detects the target battery cell image, obtains an appearance detection result of the target battery cell, and sends the appearance detection result to the control device 4.

Step S104, the control equipment moves the target battery cell to the next procedure through the normal blanking drawstring under the condition that the appearance of the received appearance detection result represents that the appearance of the target battery cell is not abnormal.

In this embodiment of the present application, when the control device 4 receives the appearance detection result sent by the upper computer 3 and directed against the target battery cell, if the appearance detection result indicates that no abnormality occurs in the appearance of the target battery cell, the target battery cell is moved to the next process through the normal blanking pull belt.

Step 105, the control device moves the target battery cell to the poor battery cell throwing field through the abnormal blanking pull belt under the condition that the appearance of the received appearance detection result represents that the appearance of the target battery cell is abnormal.

In this embodiment of the present application, when the control device 4 receives the appearance detection result sent by the upper computer 3 and directed against the target battery cell, if the appearance detection result indicates that the appearance of the target battery cell is abnormal, the target battery cell is moved to the poor battery cell feeding field through the abnormal blanking pull belt.

The embodiment of the application provides an appearance detection method of a battery cell, which is applied to an appearance detection system 0 of the battery cell, wherein the appearance detection system 0 of the battery cell comprises: a driving device 1, an image acquisition device 2, an upper computer 3 and a control device 4; wherein: the driving device 1 drives the target battery cell to rotate; and sending an image acquisition signal to the image acquisition device 2 under the condition that each driving target cell rotates by a preset angle; the image acquisition equipment 2 responds to the received image acquisition signals, performs image acquisition on the target position of the target battery cell, obtains a plurality of battery cell images corresponding to the target battery cell, and sends the battery cell images to the upper computer 3; the upper computer 3 responds to the received multiple battery cell images, generates a target battery cell image of a target battery cell based on the multiple battery cell images, detects the target battery cell image, obtains an appearance detection result of the target battery cell and sends the appearance detection result to the control equipment 4; the control equipment 4 moves the target battery cell to the next procedure through a normal blanking pull belt under the condition that the received appearance detection result represents that the appearance of the target battery cell is not abnormal; the control equipment 4 moves the target battery cell to a poor battery cell putting field through an abnormal blanking pull belt under the condition that the received appearance detection result represents that the appearance of the target battery cell is abnormal; by adopting the implementation scheme, the target cell is driven to rotate by the driving device, then the image of the target position of the target cell is acquired by the image acquisition equipment in the rotating process of the target cell, the complete image of the target cell at the target position can be acquired, finally the appearance detection is carried out on the acquired complete image through the upper computer, the control equipment determines to transfer the target cell to the normal blanking drawstring or the abnormal blanking drawstring based on the appearance detection result, the technical scheme provided by the application acquires the appearance detection result of the target cell by utilizing the mode of carrying out image acquisition on the target position of the target cell and then carrying out image detection on the image, and compared with the prior art, the false judgment condition existing in manual visual inspection is avoided, and meanwhile, the detection efficiency of the appearance detection of the cell is improved.

The embodiment of the application further provides a computer readable storage medium, on which a computer program is stored, where the computer readable storage medium stores one or more programs, where the one or more programs may be executed by one or more processors and applied to the appearance detection system 0 of the battery cell, where the computer program implements the method for detecting the appearance of the battery cell as described above.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the present disclosure. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for appearance detection of a cell, the system comprising:

the driving device is used for driving the target battery cell to rotate; and sending an image acquisition signal to image acquisition equipment under the condition that the target battery cell is driven to rotate by a preset angle;

the image acquisition equipment is used for responding to the received image acquisition signal, carrying out image acquisition on the target position of the target battery cell, obtaining a plurality of battery cell images corresponding to the target battery cell and sending the battery cell images to the upper computer;

the upper computer is used for responding to the received multiple battery cell images, generating a target battery cell image of the target battery cell based on the multiple battery cell images, detecting the target battery cell image, obtaining an appearance detection result of the target battery cell and sending the appearance detection result to the control equipment;

the control equipment is used for moving the target battery cell to the next procedure through a normal blanking pull belt under the condition that the appearance of the target battery cell is not abnormal represented by the received appearance detection result;

the control equipment is also used for moving the target battery cell to a poor battery cell throwing field through an abnormal blanking pull belt under the condition that the appearance of the target battery cell is abnormal as represented by the received appearance detection result.

2. The system of claim 1, wherein the target location is a step surface of the target cell, the driving device is a first driving device, and the image capturing device is a first image capturing device; wherein:

the first driving device is used for responding to the received first detection starting signal and driving the target battery cell to rotate in situ for at least one circle by taking the center of the target battery cell as an axis; and sending the image acquisition signal to the first image acquisition device under the condition that the target battery cell is driven to rotate by a preset angle;

the first image acquisition equipment is used for acquiring a step surface image of the target battery cell under the condition that the image acquisition signal is received, obtaining a plurality of step surface images corresponding to the target battery cell and sending the step surface images to the upper computer;

the first image acquisition equipment is located at a first position above the target battery cell, and an included angle with a preset angle exists between the first image acquisition equipment and the center of the target battery cell.

3. The system of claim 1, wherein the target location is a cylindrical surface of the target cell, the driving device is a second driving device, and the image capturing device is a second image capturing device; wherein:

The second driving device is used for responding to the received second detection starting signal and driving the target battery cell to rotate in situ for at least one circle by taking the center of the target battery cell as an axis; and sending the image acquisition signal to the second image acquisition equipment under the condition that the target battery cell is driven to rotate by a preset angle;

the second image acquisition equipment is used for acquiring a cylindrical surface image of the target battery cell under the condition that the image acquisition signal is received, obtaining a plurality of cylindrical surface images corresponding to the target battery cell and sending the cylindrical surface images to the upper computer;

the second image acquisition equipment is located at a second position right above the target battery cell.

4. The system of claim 1, wherein:

the upper computer is further used for responding to the received multiple step surface images and generating a target step surface image of the target battery cell based on the multiple step surface images; detecting the target step surface image to obtain a step surface detection result of the target battery cell;

the upper computer is also used for responding to the received multiple cylindrical surface images and generating a target cylindrical surface image of the target battery cell based on the multiple cylindrical surface images; detecting the target cylindrical surface image to obtain a cylindrical surface detection result of the target battery cell;

The upper computer is further configured to send a first appearance detection result to the control device if the step surface detection result and the cylindrical surface detection result both indicate that no abnormality occurs in the target battery cell; if at least one of the step surface detection result and the cylindrical surface detection result shows that the target battery cell is abnormal, a second appearance detection result is sent to the control equipment;

wherein the appearance detection result includes the first appearance detection result and the second appearance detection result.

5. The system of claim 4, wherein:

the upper computer is further used for detecting whether the target cylindrical surface image comprises at least two cell codes or two blue glue joints under the condition that the target cylindrical surface image is generated based on the plurality of cylindrical surface images; if the target cylindrical surface image comprises the at least two cell codes or the two blue glue joint lines, detecting the target cylindrical surface image;

and the upper computer is further used for sending an image abnormality detection result to the control equipment if the target cylindrical surface image does not comprise the at least two cell codes or the two blue glue joints.

6. The system of claim 5, further comprising a transfer device; wherein:

the control device is used for sending a first instruction to the transfer device when the first appearance detection result is received, and sending a second instruction to the transfer device when the second appearance detection result or the image abnormality detection result is received;

the transferring equipment is used for responding to the received first instruction and transferring the target battery cell to a normal blanking pull belt so that the normal blanking pull belt can move the target battery cell to the next procedure;

and the transferring equipment is used for responding to the received second instruction, transferring the target battery cell into an abnormal discharging pull belt, and enabling the abnormal discharging pull belt to move the target battery cell into a poor battery cell throwing field.

7. The system of claim 1, wherein the system further comprises:

the sensor is used for sending a first electric core in-place signal to the control equipment under the condition that the target electric core is detected to reach the step surface detection position;

the control equipment is also used for responding to the received first cell in-place signal and sending a first detection start signal to a first driving device;

The sensor is further used for sending a second cell in-place signal to the control equipment under the condition that the target cell is detected to reach the cylindrical surface detection position;

the control device is further configured to send a second detection start signal to a second driving device in response to the received second core in-place signal.

8. The system of any one of claims 1 to 7, wherein the image acquisition device is a 3D line laser camera, and the preset angle is determined according to a resolution of the 3D line laser camera.

9. A battery production line, comprising:

an appearance detection system of at least one cell of any one of claims 1 to 8;

the production equipment is used for producing the target battery cell;

and the transferring equipment is used for taking the target battery cell out of the production equipment and placing the target battery cell in the appearance detection of the battery cell, or taking the detected target battery cell out of the appearance detection system of the battery cell and transferring the target battery cell to a target station.

10. The appearance detection method of the battery cell is characterized by being applied to an appearance detection system of the battery cell, wherein the system comprises a driving device, image acquisition equipment, an upper computer and control equipment; wherein:

The driving device drives the target battery cell to rotate; and sending an image acquisition signal to the image acquisition equipment under the condition that the target battery cell is driven to rotate by a preset angle;

the image acquisition equipment responds to the received image acquisition signal, performs image acquisition on the target position of the target battery cell, obtains a plurality of battery cell images corresponding to the target battery cell and sends the battery cell images to the upper computer;

the upper computer responds to the received multiple battery cell images, generates a target battery cell image of the target battery cell based on the multiple battery cell images, detects the target battery cell image, obtains an appearance detection result of the target battery cell and sends the appearance detection result to the control equipment;

the control equipment moves the target battery cell to the next procedure through a normal blanking drawstring under the condition that the appearance of the target battery cell is represented by the received appearance detection result and is not abnormal;

and the control equipment moves the target battery cell to a poor battery cell throwing field through an abnormal blanking pull belt under the condition that the appearance of the received appearance detection result represents that the appearance of the target battery cell is abnormal.