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CN-121453673-B - Detection system, method, apparatus, device, storage medium, and program product

CN121453673BCN 121453673 BCN121453673 BCN 121453673BCN-121453673-B

Abstract

The present application relates to a detection system, method, apparatus, device, storage medium and program product. The shooting device shoots a target object at a current station to obtain a shooting image, the shooting image is sent to the detection equipment, the detection equipment determines at least one lithium precipitation type of strip-shaped lithium precipitation, linear lithium precipitation, bubble-shaped lithium precipitation and dot-shaped lithium precipitation of a lithium precipitation area on the anode electrode plate according to the shooting image, and the target object comprises the anode electrode plate obtained after the battery cell is disassembled. The lithium separation area on the anode pole piece is not required to be detected by manual visual observation, so that the detection efficiency of the lithium separation type of the lithium separation area on the anode pole piece obtained by disassembling the battery cell is improved.

Inventors

  • JIANG PING
  • Peng Canfu
  • WU HANGUO

Assignees

  • 宁德时代新能源科技股份有限公司
  • 宜宾创能测试分析技术服务有限公司

Dates

Publication Date
20260512
Application Date
20260105

Claims (17)

  1. 1. A detection system, the detection system comprising: the device comprises a shooting device, a detection device and a detection device, wherein the shooting device is used for shooting a target object at a current station to obtain a shooting image and sending the shooting image to the detection device; The detection equipment is used for determining the lithium precipitation type of the lithium precipitation area on the anode plate according to the shot image, wherein the lithium precipitation type comprises at least one of strip-shaped lithium precipitation, linear lithium precipitation, bubble-shaped lithium precipitation and dot-shaped lithium precipitation; The detection system further comprises: The controller is used for sending a control instruction to the driving device under the condition that the shooting device finishes shooting at the current station; The driving device is used for responding to the control instruction and driving the shooting device to move along the first direction of the anode pole piece for a preset distance and then to reach the next station; The shooting device is also used for shooting the anode pole piece at the next station to obtain a next shooting image; The detection equipment is used for splicing the photographed images of the anode pole pieces acquired under each station to obtain spliced images, and determining the winding number of the photographed images with the lithium precipitation areas in the battery cell based on a quotient obtained by dividing the position coordinates of the photographed images with the lithium precipitation areas in the spliced images by the total length of the anode pole pieces; The detection equipment is used for determining the lithium precipitation area of each lithium precipitation area, determining the total lithium precipitation area according to the lithium precipitation area of each lithium precipitation area corresponding to the same lithium precipitation type, and determining the lithium precipitation grade of the anode plate area corresponding to the photographed image according to the total number of each lithium precipitation area corresponding to the same lithium precipitation type, the total lithium precipitation area and the maximum lithium precipitation area in the lithium precipitation areas corresponding to the same lithium precipitation type.
  2. 2. The detection system of claim 1, further comprising a frame, wherein the drive means comprises: The transmission mechanism comprises a first matching piece and a second matching piece which are meshed and transmitted, the first matching piece is arranged on the frame, and the first matching piece extends along the first direction; The driving piece is in sliding fit with the frame along the first direction, the shooting device is installed in the driving piece, the driving piece is connected with the second matching piece and used for driving the second matching piece to rotate so that the driving piece and the second matching piece move along the first direction.
  3. 3. The detection system according to claim 2, wherein the photographing device includes: the light source assembly is connected with the driving piece and used for providing illumination for a shooting environment where the shooting device is located; The camera component is connected with the driving piece and used for photographing the target object under the condition that the light source component provides illumination, and the target object further comprises at least one of each surface of the battery cell, each surface of a bare battery cell obtained after the shell of the battery cell is peeled off, and a cathode pole piece and an isolating film obtained after the battery cell is disassembled.
  4. 4. The detection system of claim 3, wherein the camera assembly comprises: a ranging sensor connected with the zoom lens of the camera assembly for measuring a distance between the zoom lens and the target object; The zoom lens is used for adjusting the focusing position of the zoom lens on the target object according to the distance; the zoom lens comprises an indication lamp, a lens and a lens, wherein the indication lamp is used for forming a light spot on the target object, and the light spot is used for indicating the focusing position of the zoom lens.
  5. 5. The detection system of claim 3 or 4, wherein the light source assembly comprises: The outer cover is connected to the driving piece, and a cavity formed by the outer cover is used for accommodating the light source body; the light source body is connected with a light source controller positioned outside the cavity through a cable assembly penetrating out of a through hole formed in the outer cover; the cable assembly includes a cable and a cable lead-in assembly for clamping the cable and sealing a gap at the through hole.
  6. 6. The detection system according to any one of claim 1 to 4, wherein, The detection equipment is used for determining the lithium precipitation type on the anode pole piece based on the photographed image of the anode pole piece and the detection model.
  7. 7. The detection system of claim 6, wherein the detection system comprises a sensor, The detection equipment is used for obtaining an image sample of an anode plate sample obtained after the disassembly of a battery sample and an actual lithium-ion type sample corresponding to the image sample, training an initial detection model based on the image sample and the actual lithium-ion type sample to obtain the detection model, wherein the actual lithium-ion type sample comprises at least one of a strip-shaped lithium-ion sample, a linear lithium-ion sample, a bubble-shaped lithium-ion sample and a dot-shaped lithium-ion sample.
  8. 8. The detection system of claim 7, wherein the detection system comprises a sensor, The detection equipment is used for inputting the image sample into the initial detection model to obtain a predicted lithium analysis type output by the initial detection model, determining the difference between the predicted lithium analysis type and the actual lithium analysis type sample, and training the initial detection model based on the difference to obtain the detection model.
  9. 9. A detection method, wherein the detection method is applied to a detection device in a detection system, the detection method comprising: Receiving a shooting image of a target object sent by a shooting device in the detection system, wherein the shooting image is an image obtained by shooting the target object at a current station by the shooting device, and the target object comprises an anode plate obtained after the battery cell is disassembled; determining a lithium precipitation type of a lithium precipitation area on the anode plate according to the photographed image, wherein the lithium precipitation type comprises at least one of strip-shaped lithium precipitation, linear lithium precipitation, bubble-shaped lithium precipitation and dot-shaped lithium precipitation; the method further comprises the steps of: The method comprises the steps that when shooting of a current station is completed by the shooting device, a shooting completion signal is sent to a controller in the detection system, wherein the shooting completion signal is used for indicating the controller to send a control instruction to a driving device in the detection system, the control instruction is used for indicating the driving device to control the shooting device to move along a first direction of an anode pole piece for a preset distance and then to reach a next station of the current station, and the next station is used for shooting the anode pole piece to obtain a next shooting image; Receiving the next shot image sent by the shooting device; The method comprises the steps of acquiring a position coordinate of a shooting image of an anode pole piece in a lithium analysis area in a battery cell, acquiring a position coordinate of the shooting image of the anode pole piece in the lithium analysis area in the battery cell, acquiring a total length of the anode pole piece in the battery cell, and acquiring a position coordinate of the shooting image of the anode pole piece in the lithium analysis area in the battery cell; Determining the lithium precipitation area of each lithium precipitation area, and determining the total lithium precipitation area according to the lithium precipitation area of each lithium precipitation area corresponding to the same lithium precipitation type; And determining the lithium precipitation grade of the anode plate according to the total number of the lithium precipitation areas corresponding to the same lithium precipitation type, the total lithium precipitation area and the maximum lithium precipitation area in the lithium precipitation areas corresponding to the same lithium precipitation type.
  10. 10. The method according to claim 9, wherein the determining the lithium-analysis type of the lithium-analysis region on the anode sheet based on the captured image includes: And determining the lithium precipitation type on the anode plate based on the photographed image of the anode plate and the detection model.
  11. 11. The method of detecting according to claim 10, further comprising: acquiring an image sample of an anode plate sample obtained after the disassembly of a battery cell sample and an actual lithium analysis type sample corresponding to the image sample; And training an initial detection model based on the image sample and the actual lithium-ion type sample to obtain the detection model, wherein the actual lithium-ion type sample comprises at least one of a strip-shaped lithium-ion sample, a linear lithium-ion sample, a bubble-shaped lithium-ion sample and a dot-shaped lithium-ion sample.
  12. 12. The method according to claim 9, wherein the determining the lithium-analysis type of the lithium-analysis region on the anode sheet based on the captured image includes: Preprocessing the photographed image of the anode plate to obtain a target image; Determining a lithium precipitation area in the target image; and under the condition that the lithium separation area meets the preset conditions corresponding to the preset lithium separation type, determining the lithium separation type of the lithium separation area as the preset lithium separation type.
  13. 13. The method according to claim 9, wherein determining the number of windings of the photographed image in which the lithium-ion region exists in the battery cell based on a quotient obtained by dividing a position coordinate of the photographed image in which the lithium-ion region exists in the spliced image by a total length of the anode electrode sheet, comprises: Determining the quotient as the winding number when the quotient is an integer; And under the condition that the quotient is not an integer, rounding up the quotient to obtain a rounding result, and determining the rounding result as the winding number.
  14. 14. A detection apparatus, characterized in that the detection apparatus is provided to a detection device in a detection system, the detection apparatus comprising: The device comprises a detection system, a receiving module, a detection module and a control module, wherein the detection system is used for detecting a battery cell, the detection module is used for detecting the battery cell, and the detection module is used for detecting the battery cell; The first determining module is used for determining the lithium precipitation type of the lithium precipitation area on the anode plate according to the shot image, wherein the lithium precipitation type comprises at least one of strip-shaped lithium precipitation, linear lithium precipitation, bubble-shaped lithium precipitation and dot-shaped lithium precipitation; the device comprises a shooting device, a transmitting module, a controller, a detecting system and a control module, wherein the shooting device is used for shooting a current position of the anode pole piece, the current position is used for shooting the anode pole piece, the transmitting module is used for transmitting a shooting completion signal to the controller in the detecting system when the shooting device finishes shooting at the current position, the shooting completion signal is used for indicating the controller to transmit a control instruction to a driving device in the detecting system, the control instruction is used for indicating the driving device to drive the shooting device to move along the first direction of the anode pole piece for a preset distance and then to reach the next position of the current position, and the next position is used for shooting the anode pole piece to obtain a next shooting image; the receiving module is further configured to receive the next shot image sent by the shooting device; the detection device further includes: The second determining module is used for determining the lithium-separating area of each lithium-separating area, determining the total lithium-separating area according to the lithium-separating area of each lithium-separating area corresponding to the same lithium-separating type, and determining the lithium-separating grade of the anode plate according to the total number of each lithium-separating areas corresponding to the same lithium-separating type, the total lithium-separating area and the maximum lithium-separating area in the lithium-separating areas corresponding to the same lithium-separating type; the splicing module is used for splicing the photographed images of the anode pole pieces acquired under each station to obtain spliced images; And the third determining module is used for determining the winding circle number of the shot image with the lithium-ion area in the battery cell based on a quotient obtained by dividing the position coordinate of the shot image with the lithium-ion area in the spliced image by the total length of the anode pole piece.
  15. 15. A detection device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 9 to 13 when the computer program is executed.
  16. 16. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 9 to 13.
  17. 17. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 9 to 13.

Description

Detection system, method, apparatus, device, storage medium, and program product Technical Field The present application relates to the field of pole piece detection technology, and in particular, to a detection system, method, apparatus, device, storage medium, and program product. Background The lithium ion battery has been widely applied to key fields of new energy automobiles, energy storage systems and the like by virtue of the advantages of high energy density, long cycle life and the like, wherein a winding type battery core becomes a mainstream configuration due to compact structure and high production efficiency. However, under complex conditions such as overcharging, thermal runaway, etc., the battery has a failure condition. Therefore, the study of failure mechanism of the failed battery is a core link for optimizing the battery design. In failure mechanism research, since lithium deposition is easy to occur on an anode plate in a battery under a complex working condition to cause the battery to fail, the type of lithium precipitation on the anode plate becomes a core key link of the whole detection flow. At present, a manual visual detection mode is adopted to determine the lithium precipitation type on the anode plate after the battery cell is disassembled, however, the lithium precipitation type has the problem of low detection efficiency. Disclosure of Invention In view of the foregoing, it is desirable to provide a detection system, a method, an apparatus, a device, a storage medium, and a program product that can improve the detection efficiency of a lithium precipitation type in a lithium precipitation region on an anode tab obtained by disassembling a cell. In a first aspect, the present application provides a detection system comprising: The shooting device is used for shooting a target object at the current station to obtain a shooting image and sending the shooting image to the detection equipment, wherein the target object comprises an anode plate obtained after the battery cell is disassembled; The detection equipment is used for determining the lithium precipitation type of a lithium precipitation area on the anode plate according to the shot image, wherein the lithium precipitation type comprises at least one of strip-shaped lithium precipitation, linear lithium precipitation, bubble-shaped lithium precipitation and dot-shaped lithium precipitation; the detection system further comprises: The controller is used for sending a control instruction to the driving device under the condition that the shooting device finishes shooting at the current station; The driving device is used for responding to the control instruction, driving the shooting device to move along the first direction of the anode pole piece for a preset distance and then to reach the next station; the shooting device is also used for shooting the anode pole piece at the next station to obtain a next shooting image. In the embodiment, a shooting device shoots a target object at a current station to obtain a shooting image, the shooting image is sent to a detection device, the detection device determines at least one lithium precipitation type of strip-shaped lithium precipitation, linear lithium precipitation, bubble-shaped lithium precipitation and dot-shaped lithium precipitation of a lithium precipitation area on an anode electrode sheet according to the shooting image, and the target object comprises the anode electrode sheet obtained after the battery cell is disassembled. The lithium separation area on the anode pole piece is not required to be detected by manual visual observation, so that the detection efficiency of the lithium separation type of the lithium separation area on the anode pole piece obtained by disassembling the battery cell is improved. And the shooting device is driven to move along the first direction of the anode pole piece by a preset distance and then to reach the next station through the control instruction sent by the controller, the shooting device shoots the anode pole piece at the next station to obtain a next shooting image, shooting of the anode pole piece with the whole length in the first direction is realized, follow-up analysis of shooting images of any area of the anode pole piece is facilitated, a lithium separation area is obtained, and further the lithium separation type is determined based on the lithium separation area of the anode pole piece, so that comprehensive detection of the lithium separation area of the whole anode pole piece is realized. In one embodiment, the detection system further comprises a frame, and the driving device comprises: The transmission mechanism comprises a first matching piece and a second matching piece which are meshed and transmitted, the first matching piece is arranged on the frame, and the first matching piece extends along the first direction; The driving piece is in sliding fit with the frame along the first direction, the shooting devic