Lithium battery cell detection system and method thereof

Abstract

The lithium battery cell detection system comprises a belt conveyor, at least one visual detection mechanism, a synchronous detection mechanism and a driving circuit, the at least one visual detection mechanism is connected with the upper end face of the belt conveyor and wraps the upper end face of the belt conveyor, the visual detection mechanisms are distributed in the axis direction of the belt conveyor, and the synchronous detection mechanism is connected with the driving circuit. The synchronous detection mechanism is connected with the upper end face of the belt conveyor and distributed in the axis direction of the belt conveyor, and the drive circuit is connected with the outer side face of the belt conveyor and electrically connected with the belt conveyor, the visual detection mechanism and the synchronous detection mechanism. The using method comprises the four steps of system assembling, detection pre-adjustment, detection operation and conveying and transferring. On one hand, the requirements of continuous, rapid and efficient detection operation of battery cells of various structure types can be effectively met; and on the other hand, the precision and comprehensiveness of battery cell detection operation are effectively improved, so that the production efficiency of battery products and the stability of product quality are improved.

Description

Technical Field

[0001] The present invention relates to lithium battery production equipment, in particular to a lithium battery cell detection system and method. Background Art

[0002] The quality of lithium battery cells is the basis for the quality of lithium battery use. Therefore, a variety of cell quality testing equipment has been developed in lithium battery production. However, in actual use, it is found that the current cell testing equipment often has a single function and low testing efficiency. For example, during the testing operation, the staff needs to transfer the cell to the pressure operation equipment for pressure collection, and then manually transfer the pressure-tested cell to the voltage testing equipment before performing subsequent testing operations. This results in low efficiency of the current cell testing operation, and the testing operation is easily affected by human factors, which greatly affects the detection accuracy. As a result, the efficiency and quality of battery cell testing operations are difficult to effectively meet the needs of lithium battery production and use.

[0003] Therefore, in view of the shortcomings existing in current practical work, it is necessary to develop a lithium battery cell detection system and method to meet the needs of practical work. Summary of the Invention

[0004] The purpose of the present invention is to provide a lithium battery cell detection system and method thereof. On the one hand, the invention can effectively meet the needs of continuous, rapid and efficient detection of battery cells of various structural types; on the other hand, it effectively improves the accuracy and comprehensiveness of battery cell detection operations, thereby helping to improve the production efficiency of battery products and the stability of product quality.

[0005] To achieve the above objectives, the present invention provides a lithium battery cell detection system and a method for using the same: A lithium battery cell detection system includes a belt conveyor, a visual detection mechanism, a synchronous detection mechanism and a drive circuit, wherein there is at least one belt conveyor, whose conveying axis is distributed parallel to the horizontal plane, at least one visual detection mechanism is connected to the upper end surface of the belt conveyor and covered on the outside of the upper end surface of the belt conveyor, and each visual detection mechanism is distributed along the axis direction of the belt conveyor, the synchronous detection mechanism is connected to the upper end surface of the belt conveyor and distributed along the axis direction of the belt conveyor, the drive circuit is connected to the outer side surface of the belt conveyor, and is electrically connected to the belt conveyor, the visual detection mechanism and the synchronous detection mechanism respectively.

[0006] Furthermore, the visual inspection mechanism includes a guide rail, a horizontal drive mechanism, a load-bearing keel, a load-bearing support, a horizontal drive column, a lifting drive column, a detection splint, a detection electrode, a pressure sensor, an infrared temperature measurement camera, a CCD camera, a flip mechanism, an inclination sensor, a battery tester, and a terminal. There are two guide rails connected to the upper end face of the belt conveyor, symmetrically distributed on both sides of the belt conveyor axis and parallel to the belt conveyor axis. The load-bearing keel is a "冂"-shaped frame structure, and at least one load-bearing keel The lower end surface of the bearing keel is slidably connected to the guide slide rail through a horizontal driving mechanism and is covered on the outside of the upper end surface of the belt conveyor. The bearing bracket is located in the bearing keel, and its upper end surface is connected to the top of the bearing keel, and its lower end surface is distributed parallel to the upper end surface of the belt conveyor. There is at least one infrared temperature measuring camera and CCD camera, which are respectively connected to the lower end surface of the bearing bracket. The optical axes of the infrared temperature measuring camera and the CCD camera are perpendicular to and intersect with the axis of the belt conveyor, and the infrared temperature measuring camera and the CCD camera are along the axis direction of the belt conveyor. Distribution, there are at least two horizontal drive columns, and each horizontal drive column is symmetrically distributed on the left and right sides of the load-bearing platform, and is distributed parallel to the lower end face of the load-bearing platform. The rear half of the horizontal drive column is embedded in the load-bearing platform, and the front end face is hinged to the upper end face of a lifting drive column through a flipping mechanism. The axes of the horizontal drive column and the lifting drive column intersect and are vertically distributed, and the axis of the lifting drive column is at an angle of 0°-180° with the upper end face of the belt conveyor, and at least one inclination sensor is further provided on the outer side of the lifting drive column. The lower end face of the lifting drive column is connected to the detection splint through a pressure sensor, and the surface of the detection splint is parallel to the axis of the lifting drive column. At the same time, at least two detection electrodes are further provided in its front end face, and the detection electrodes are all electrically connected to the battery tester, and the battery tester is connected to the load-bearing platform, and the horizontal drive mechanism, horizontal drive column, lifting drive column, detection electrode, pressure sensor, infrared temperature measurement camera, CCD camera, flipping mechanism, inclination sensor, and battery tester are all electrically connected to the wiring terminal, and are electrically connected to the drive circuit through the wiring terminal.

[0007] Furthermore, the supporting platform is a cavity structure with a rectangular cross-section, the battery tester is located in the supporting platform, and the plurality of wiring terminals are embedded in the side surface of the supporting platform. At the same time, the left and right sides of the supporting platform are provided with assembly grooves, and the number of assembly grooves is consistent with the number of horizontal drive columns, and each assembly groove is covered outside the rear half of a horizontal drive column and is coaxially distributed with the horizontal drive column. At the same time, when the horizontal drive column is in a retracted state, the upper end surface of the lifting drive column is against the side surface of the supporting platform.

[0008] Furthermore, the detection splint includes a hard insulating substrate, an elastic insulating pad, a slide groove, and a spring electrode, wherein the hard insulating substrate is a plate-like structure with a rectangular cross-section, the rear end face of which is connected to the pressure sensor and coaxially distributed, and the front end face is connected to at least two slide grooves and the elastic insulating pad. A spring electrode parallel to its axis is provided in each slide groove, each spring electrode is electrically connected to the battery tester through a wire, and the spring electrodes are connected in parallel, and each slide groove is slidingly connected to at least one detection electrode, the rear half of the detection electrode is embedded in the slide groove, and is against and electrically connected to the spring electrode, and the detection electrode is slidingly connected to the slide groove and the spring electrode, the elastic insulating pad is a grid structure, and is respectively covered on the outside of the slide groove and the detection electrode, and the front end face of the elastic insulating pad is flush with the front end face of the detection electrode when not under pressure.

[0009] Furthermore, the synchronous detection mechanism includes a support plate, a positioning groove, a guide slide groove, a positioning fixture, a slider electrode, a strip electrode, a temperature sensor, a spring electrode, a detection head, an adjustment groove, a contact electrode, an electric heating wire, and a semiconductor refrigeration mechanism, wherein the support plate is a plate-like structure with a rectangular cross section, the lower end face of which is connected to the conveyor belt of the belt conveyor through a positioning fixture, and is distributed parallel to the conveyor belt of the belt conveyor, and the support plate is located in the center of the conveyor belt of the belt conveyor, and the positioning groove is at least one, which is connected to the upper end face of the support plate and is connected to the support plate. The upper end surface is distributed in parallel, and the axis of the positioning groove is perpendicular to the axis of the conveyor belt of the belt conveyor, and the length of the positioning groove is not greater than 80% of the width of the support plate. A detection head is provided on the upper end surface of the support plate corresponding to both ends of the positioning groove. The detection head is slidably connected to the upper end surface of the support plate through at least one adjustment groove, and the axis of the detection head is perpendicular to and intersects with the axis of the positioning groove. A positioning slot is set on the rear end surface of the detection head, and is connected to the visual detection mechanism through the positioning slot. A spring electrode is provided at the position corresponding to the front end surface of the detection head and the positioning slot. The front half is located in the positioning groove and is coaxially distributed with the positioning groove, the rear half is embedded in the detection head and is electrically connected to a contact electrode, the contact electrode is embedded outside the rear end surface of the detection head and is located in the positioning card slot, and the front end surface of the contact electrode exceeds the bottom of the positioning card slot by at least 1 mm. There are two guide chutes, which are symmetrically distributed on both sides of the belt conveyor axis and parallel to the belt conveyor axis. At the same time, each guide chute is provided with a strip electrode parallel to its axis. The strip electrode is electrically connected to the drive circuit through a wire, and the slider is electrically connected to the drive circuit through a wire. There are at least two electrodes, which are respectively connected to the left end face and the right end face of the support plate, and the front end face thereof is located in the guide groove, and is abutted and slidably connected to the guide groove and the strip electrode, and the slider electrode and the strip electrode are electrically connected to each other. At least one electric heating wire is also provided in the support plate, and at least one semiconductor refrigeration mechanism is provided on the lower end face of the support plate. The number of the temperature sensors is consistent with the number of the positioning grooves, and at least one temperature sensor is provided on the inner side of each positioning groove. The temperature sensor, the electric heating wire and the semiconductor refrigeration mechanism are all electrically connected to the slider electrodes.

[0010] Furthermore, the support plate is a groove-shaped structure with a "冂" shape in cross section, and the semiconductor refrigeration mechanism is embedded in the groove body at its lower end and connected to the groove bottom. The positioning groove is a groove-shaped structure with a cross section of either "凵" ​​or "U".

[0011] Furthermore, the driving circuit is a circuit system based on a programmable controller, and is further provided with a serial communication circuit and a control interface based on multi-touch.

[0012] A method for using a lithium battery cell detection system comprises the following steps: S1, system assembly: First, the belt conveyor is constructed according to production needs, and the front end of the belt conveyor is connected to the lithium battery cell production line, and the back end is connected to the next process of the battery production line; then the visual inspection mechanism, synchronous inspection mechanism and drive circuit are assembled and debugged with the belt conveyor to complete the system assembly operation; S2, pre-test adjustment: After completing step S1, the battery cells to be tested are loaded into the synchronous testing mechanism. The battery cells to be tested, after being clamped and positioned, are transported and transferred synchronously with the synchronous testing mechanism by a belt conveyor. During the transfer process, an electrical connection is established between the battery cells and the circuit is disconnected. On the other hand, the external ambient temperature of the battery cells is adjusted, and the battery cells to be tested are transferred under a constant temperature and pressure state. S3, inspection operation, when the synchronous inspection mechanism is transported by the belt conveyor to the position directly below the visual inspection mechanism, the visual inspection mechanism first inspects the initial external appearance, temperature, and high-temperature area distribution of the battery cell to be inspected; on the other hand, the inspection clamp of the visual inspection mechanism is clamped outside the inspection head of the synchronous inspection mechanism, abutted against and electrically connected to the contact electrode of the inspection head; then, on the one hand, the battery tester energizes and inspects the battery cell to be inspected; on the other hand, the horizontal drive column operates to drive the two inspection clamps to apply pressure to the battery cell to be inspected; finally, the pressure sensor inspects the compressive strength of the battery cell to be inspected; the battery tester inspects the resistivity, rated voltage, rated current, charge and discharge efficiency, heat generation, and short-circuit point of the battery cell, and transmits the inspection data to the drive circuit; S4, transportation and transfer. After completing the inspection in step S3, drive the visual inspection mechanism to run and disconnect the connection with the current synchronous inspection mechanism, and drive the current synchronous inspection mechanism to transport the inspected battery cells to the subsequent battery processing production line under the drive of the belt conveyor. At the same time, perform inspection operations on the battery cells to be inspected that are newly transported to the visual inspection mechanism.

[0013] Compared with the existing technology, the system of the present invention is highly modularized and integrated, and has strong environmental adaptability. It is based on a machine vision inspection mechanism. On the one hand, it can effectively meet the needs of continuous, rapid and efficient inspection of battery cells of various structural types; on the other hand, it effectively improves the accuracy and comprehensiveness of battery cell inspection operations, thereby helping to improve the production efficiency of battery products and the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the partial structure of the side view of the present invention; Figure 2 It is a schematic diagram of the local structure of the visual inspection mechanism; Figure 3 Schematic diagram of the partial structure of the cross-section of the testing splint; Figure 4 It is a schematic diagram of the local structure of the synchronous detection mechanism from a bird's-eye view; Figure 5 It is a schematic diagram of the cross-section of the local structure when the synchronous detection mechanism is connected to the belt conveyor; Figure 6 Schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1-Figure 5 A lithium battery cell detection system includes a belt conveyor 1, a visual detection mechanism 2, a synchronous detection mechanism 3 and a drive circuit 4, wherein there is at least one belt conveyor 1, whose conveying axis is distributed parallel to the horizontal plane, at least one visual detection mechanism 2 is connected to the upper end surface of the belt conveyor 1 and covered on the outside of the upper end surface of the belt conveyor 1, and each visual detection mechanism 2 is distributed along the axial direction of the belt conveyor 1, the synchronous detection mechanism 3 is connected to the upper end surface of the belt conveyor 1 and distributed along the axial direction of the belt conveyor 1, the drive circuit 4 is connected to the outer side surface of the belt conveyor 1, and is electrically connected to the belt conveyor 1, the visual detection mechanism 2, and the synchronous detection mechanism 3 respectively.

[0017] It is emphasized that the visual detection mechanism 2 includes a guide rail 21, a horizontal drive mechanism 22, a load-bearing keel 23, a load-bearing support 24, a horizontal drive column 25, a lifting drive column 26, a detection splint 27, a detection electrode 28, a pressure sensor 29, an infrared temperature measurement camera 201, a CCD camera 202, a flip mechanism 203, an inclination sensor 204, a battery tester 205, and a terminal 206. There are two guide rails 21, which are connected to the upper end face of the belt conveyor 1 and are symmetrically distributed on both sides of the axis of the belt conveyor 1 and parallel to the axis of the belt conveyor 1. The load-bearing keel 23 is a "冂"-shaped frame structure, and the load-bearing keel 2 3 at least one, the lower end surface of the load-bearing keel 23 is slidably connected to the guide rail 21 through the horizontal drive mechanism 22, and is covered on the outer end surface of the belt conveyor 1, the load-bearing support 24 is located in the load-bearing keel 23, its upper end surface is connected to the top of the load-bearing keel 23, and its lower end surface is parallel to the upper end surface of the belt conveyor 1, the infrared temperature measuring camera 201 and the CCD camera 202 are each at least one, and are respectively connected to the lower end surface of the load-bearing support 24, the infrared temperature measuring camera 201 and the CCD camera 202 optical axis are perpendicular to and intersect the axis of the belt conveyor 1, and the infrared temperature measuring camera 201 and the CCD camera 202 are along the axis direction of the belt conveyor 1 Distribution, there are at least two horizontal drive columns 25, and each horizontal drive column 25 is symmetrically distributed on the left and right sides of the load-bearing platform 24, and is distributed parallel to the lower end face of the load-bearing platform 24. The rear half of the horizontal drive column 25 is embedded in the load-bearing platform 24, and the front end face is hinged to the upper end face of a lifting drive column 26 through a flip mechanism 203. The axes of the horizontal drive column 25 and the lifting drive column 26 intersect and are distributed vertically, and the axis of the lifting drive column 26 is at an angle of 0°-180° to the upper end face of the belt conveyor 1, and at least one inclination sensor 204 is further provided on the outer side of the lifting drive column 26. The lower end face of the lifting drive column 26 and the detection splint 27 are connected by a pressure sensor. The force sensor 29 is connected, the detection splint 27 is distributed parallel to the axis of the lifting drive column 26, and at least two detection electrodes 28 are provided in the front end surface thereof, the detection electrodes 28 are electrically connected to the battery tester 205, the battery tester 205 is connected to the supporting platform 24, and the horizontal drive mechanism 22, the horizontal drive column 25, the lifting drive column 26, the detection electrode 28, the pressure sensor 29, the infrared temperature measuring camera 201, the CCD camera 202, the flipping mechanism 203, the tilt sensor 204, and the battery tester 205 are all electrically connected to the wiring terminal 206, and are electrically connected to the drive circuit 4 through the wiring terminal 206.

[0018] Among them, the supporting platform 24 is a cavity structure with a rectangular cross-section, the battery tester 205 is located in the supporting platform 24, and the wiring terminals 206 are several, all embedded in the side surface of the supporting platform 24. At the same time, the left and right sides of the supporting platform 24 are provided with assembly grooves 207, and the number of assembly grooves 207 is consistent with the number of horizontal drive columns 25, and each assembly groove 207 is covered outside the rear half of a horizontal drive column 25 and is coaxially distributed with the horizontal drive column 25. At the same time, when the horizontal drive column 25 is in a retracted state, the upper end face of the lifting drive column 26 is against the side surface of the supporting platform 24.

[0019] In this embodiment, the detection splint 27 includes a hard insulating substrate 271, an elastic insulating pad 272, a chute 273, and a spring electrode 274, wherein the hard insulating substrate 271 is a plate-like structure with a rectangular cross section, the rear end face of which is connected to the pressure sensor 29 and coaxially distributed, and the front end face is connected to at least two chute 273 and the elastic insulating pad 272, and each chute 273 is provided with a spring electrode 274 distributed parallel to its axis, and each spring electrode 274 is electrically connected to the battery tester 205 through a wire. , and each spring electrode 274 is connected in parallel, and each slide groove 273 is slidingly connected to at least one detection electrode 28, the rear half of the detection electrode 28 is embedded in the slide groove 273, and is against and electrically connected to the spring electrode 274, and the detection electrode 28 is slidingly connected to the slide groove 273 and the spring electrode 274, the elastic insulating pad 272 is a grid structure, and is respectively covered on the outside of the slide groove 273 and the detection electrode 28, and the front end surface of the elastic insulating pad 272 is flush with the front end surface of the detection electrode 28 when it is not under pressure.

[0020] In addition, the synchronous detection mechanism 3 includes a support plate 31, a positioning groove 32, a guide groove 33, a positioning fixture 34, a slider electrode 35, a strip electrode 36, a temperature sensor 37, a spring electrode 274, a detection head 38, an adjustment groove 39, a contact electrode 30, an electric heating wire 301, and a semiconductor refrigeration mechanism 302, wherein the support plate 31 is a plate-like structure with a rectangular cross section, the lower end face of which is connected to the conveyor belt of the belt conveyor 1 through the positioning fixture 34, and is distributed parallel to the conveyor belt of the belt conveyor 1, and the support plate 31 is located in the center of the conveyor belt of the belt conveyor 1, and there is at least one positioning groove 32, which is connected to the upper end face of the support plate 31, and It is distributed parallel to the upper end surface of the support plate 31, and the axis of the positioning groove 32 is perpendicular to the conveyor belt axis of the belt conveyor 1, and the length of the positioning groove 32 is not greater than 80% of the width of the support plate 31. A detection head 38 is provided on the upper end surface of the support plate 31 corresponding to both ends of the positioning groove 32. The detection head 38 is slidably connected to the upper end surface of the support plate 31 through at least one adjustment groove 39, and the axis of the detection head 38 is perpendicular to and intersects with the axis of the positioning groove 32. A positioning slot 303 is set on the rear end surface of the detection head 38, and is connected to the visual detection mechanism 2 through the positioning slot 303. A spring electrode 374 is provided at the position corresponding to the front end surface of the detection head 38 and the positioning slot 32. The front half of the spring electrode 374 is located in the positioning groove 32 and is coaxially distributed with the positioning groove 32. The rear half is embedded in the detection head 38 and is electrically connected to a contact electrode 30. The contact electrode 30 is embedded outside the rear end surface of the detection head 38 and is located in the positioning card slot 303. The front end surface of the contact electrode 30 exceeds the bottom of the positioning card slot 303 by at least 1 mm. There are two guide slots 33, which are symmetrically distributed on both sides of the axis of the belt conveyor 1 and parallel to the axis of the belt conveyor 1. At the same time, each guide slot 33 is provided with a strip electrode 36 distributed parallel to its axis. The strip electrode 36 is electrically connected to the drive circuit 4 through a wire. The slider electrode 3 At least two of the plurality of temperature sensors 37 are connected to the left and right end surfaces of the support plate 31, respectively. The front end surfaces of the plurality of temperature sensors 37 are located in the guide slot 33, abutting against and slidingly connected to the guide slot 33 and the strip electrode 36. The slider electrode 35 and the strip electrode 36 are electrically connected to each other. At least one electric heating wire 301 is provided in the support plate 31, and at least one semiconductor cooling mechanism 302 is provided on the lower end surface of the support plate 31. The number of the plurality of temperature sensors 37 is the same as the number of the positioning slots 32, and at least one temperature sensor 37 is provided on the inner side surface of each positioning slot 32. The temperature sensors 37, the electric heating wire 301, and the semiconductor cooling mechanism 302 are all electrically connected to the slider electrode 35.

[0021] In this embodiment, the support plate 31 is a groove-shaped structure with a "冂" shape in cross section, and the semiconductor refrigeration mechanism 302 is embedded in the groove body at its lower end and connected to the bottom of the groove. The positioning groove 32 is a groove-shaped structure with a cross section of either "凵" ​​or "U".

[0022] In this embodiment, the driving circuit 4 is a circuit system based on a programmable controller, and is further provided with a serial communication circuit and a control interface based on multi-touch.

[0023] like Figure 6 As shown, a method for using a lithium battery cell detection system includes the following steps: S1, system assembly: First, the belt conveyor is constructed according to production needs, and the front end of the belt conveyor is connected to the lithium battery cell production line, and the back end is connected to the next process of the battery production line; then the visual inspection mechanism, synchronous inspection mechanism and drive circuit are assembled and debugged with the belt conveyor to complete the system assembly operation; S2, pre-test adjustment: After completing step S1, the battery cell to be tested is loaded into the synchronous testing mechanism, and the battery cell to be tested, after being clamped and positioned, is transported and transferred synchronously with the synchronous testing mechanism by a belt conveyor. During the transfer process, on the one hand, an electrical connection is established between the battery cells and the circuit is disconnected; on the other hand, the external ambient temperature of the battery cells is adjusted, and the battery cells to be tested are transferred under a constant temperature and constant pressure state.

[0024] S3, detection operation, when the synchronous detection mechanism is transported by the belt conveyor to the bottom of the visual detection mechanism, the visual detection mechanism first detects the initial external, temperature and high-temperature area distribution status of the battery cell to be detected; on the other hand, the detection clamp of the visual detection mechanism is clamped outside the detection head of the synchronous detection mechanism, and is abutted against and electrically connected to the contact electrode of the detection head; then, on the one hand, the battery tester energizes and detects the battery cell to be detected; on the other hand, the horizontal driving column runs to drive the two detection clamps to apply pressure to the battery cell to be detected; finally, the pressure sensor detects the compressive resistance of the battery cell to be detected; the battery tester detects the resistivity, rated voltage, rated current, charge and discharge efficiency, heat generation and short-circuit point of the battery cell, and transmits the detection data to the drive circuit.

[0025] S4, transportation and transfer. After completing the inspection in step S3, drive the visual inspection mechanism to run and disconnect the connection with the current synchronous inspection mechanism, and drive the current synchronous inspection mechanism to transport the inspected battery cells to the subsequent battery processing production line under the drive of the belt conveyor. At the same time, perform inspection operations on the battery cells to be inspected that are newly transported to the visual inspection mechanism.

[0026] Compared with the existing technology, the system of the present invention is highly modularized and integrated, and has strong environmental adaptability. It is based on a machine vision inspection mechanism. On the one hand, it can effectively meet the needs of continuous, rapid and efficient inspection of battery cells of various structural types; on the other hand, it effectively improves the accuracy and comprehensiveness of battery cell inspection operations, thereby helping to improve the production efficiency of battery products and the stability of product quality.

[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0028] In the description of this specification, the terms "connect", "install", "fix", "set", etc. are understood in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. As in this example, for ordinary technicians in this field, the specific meanings of the above terms in the present invention or in the invention can be understood according to the specific circumstances.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery cell detection system, characterized in that: The lithium battery cell detection system includes a belt conveyor, a vision detection mechanism, a synchronous detection mechanism and a drive circuit. There is at least one belt conveyor, and its conveying axis is parallel to the horizontal plane. There is at least one vision detection mechanism, which is connected to the upper end surface of the belt conveyor and covers the outside of the upper end surface of the belt conveyor. Each vision detection mechanism is distributed along the axis direction of the belt conveyor. The synchronous detection mechanism is connected to the upper end surface of the belt conveyor and is distributed along the axis direction of the belt conveyor. The drive circuit is connected to the outer side surface of the belt conveyor and is electrically connected to the belt conveyor, the vision detection mechanism and the synchronous detection mechanism respectively.

2. A lithium battery cell detection system according to claim 1, characterized in that: The vision detection mechanism includes guide rails, a horizontal drive mechanism, a bearing keel, a bearing platform, horizontal drive columns, lifting drive columns, detection clamping plates, detection electrodes, pressure sensors, infrared temperature measurement cameras, CCD cameras, a flipping mechanism, inclination sensors, battery detectors and terminal blocks. There are two guide rails in total, which are connected to the upper end surface of the belt conveyor, symmetrically distributed on both sides of the axis of the belt conveyor and parallel to the axis of the belt conveyor. The bearing keel is a "冂"-shaped frame structure, and there is at least one bearing keel. The lower end surface of the bearing keel is slidably connected to the guide rails through the horizontal drive mechanism and covers the outside of the upper end surface of the belt conveyor. The bearing platform is located inside the bearing keel, its upper end surface is connected to the top of the bearing keel, and its lower end surface is parallel to the upper end surface of the belt conveyor. There is at least one infrared temperature measurement camera and at least one CCD camera, which are respectively connected to the lower end surface of the bearing platform. The optical axes of the infrared temperature measurement camera and the CCD camera are perpendicular to and intersect with the axis of the belt conveyor, and the infrared temperature measurement camera and the CCD camera are distributed along the axis direction of the belt conveyor. There are at least two horizontal drive columns, and each horizontal drive column is symmetrically distributed on the left and right side surfaces of the bearing platform and is parallel to the lower end surface of the bearing platform. The rear half of the horizontal drive column is embedded in the bearing platform, and the front end surface is hinged to the upper end surface of a lifting drive column through the flipping mechanism. The axes of the horizontal drive column and the lifting drive column intersect and are perpendicular to each other, and the axis of the lifting drive column forms an angle of 0°-180° with the upper end surface of the belt conveyor. At least one inclination sensor is additionally provided on the outer side surface of the lifting drive column. The lower end surface of the lifting drive column is connected to the detection clamping plate through the pressure sensor. The plate surface of the detection clamping plate is parallel to the axis of the lifting drive column, and at least two detection electrodes are additionally provided inside the front end surface. The detection electrodes are all electrically connected to the battery detector. The battery detector is connected to the bearing platform, and the horizontal drive mechanism, the horizontal drive column, the lifting drive column, the detection electrode, the pressure sensor, the infrared temperature measurement camera, the CCD camera, the flipping mechanism, the inclination sensor and the battery detector are all electrically connected to the terminal block and are electrically connected to the drive circuit through the terminal block.

3. A lithium battery cell detection system according to claim 2, characterized in that: The supporting platform is a cavity structure with a rectangular cross-section. The battery tester is located in the supporting platform. The plurality of connecting terminals are embedded in the side surface of the supporting platform. At the same time, the left and right sides of the supporting platform are provided with assembly grooves, and the number of assembly grooves is consistent with the number of horizontal drive columns. Each assembly groove is covered outside the rear half of a horizontal drive column and is coaxially distributed with the horizontal drive column. At the same time, when the horizontal drive column is in a retracted state, the upper end surface of the lifting drive column is against the side surface of the supporting platform.

4. A lithium battery cell detection system according to claim 2, characterized in that: The detection splint includes a hard insulating substrate, an elastic insulating pad, a slide groove, and a spring electrode, wherein the hard insulating substrate is a plate-like structure with a rectangular cross-section, the rear end face of which is connected to the pressure sensor and coaxially distributed, and the front end face is connected to at least two slide grooves and the elastic insulating pad. A spring electrode parallel to its axis is provided in each slide groove, each spring electrode is electrically connected to the battery tester through a wire, and the spring electrodes are connected in parallel, and each slide groove is slidingly connected to at least one detection electrode, the rear half of the detection electrode is embedded in the slide groove, and is against and electrically connected to the spring electrode, and the detection electrode is slidingly connected to the slide groove and the spring electrode, the elastic insulating pad is a grid structure, and is respectively covered on the outside of the slide groove and the detection electrode, and the front end face of the elastic insulating pad is flush with the front end face of the detection electrode when not under pressure.

5. A lithium battery cell detection system according to claim 1, characterized in that: The synchronous detection mechanism includes a support plate, a positioning groove, a guiding sliding groove, a positioning fixture, a slider electrode, a strip electrode, a temperature sensor, a leaf spring electrode, a detection head, an adjustment groove, a contact electrode, an electric heating wire, and a semiconductor refrigeration mechanism. The support plate is a plate-like structure with a rectangular cross-section. Its lower end surface is connected to the conveyor belt of the belt conveyor through the positioning fixture, and is parallel to the conveyor belt of the belt conveyor. The support plate is located at the central position of the conveyor belt of the belt conveyor. There is at least one positioning groove, which is connected to the upper end surface of the support plate and is parallel to the upper end surface of the support plate. At the same time, the axis of the positioning groove is perpendicular to the axis of the conveyor belt of the belt conveyor, and the length of the positioning groove is not greater than 80% of the width of the support plate. Detection heads are provided on the upper end surface of the support plate corresponding to both ends of the positioning groove. The detection head is slidably connected to the upper end surface of the support plate through at least one adjustment groove, and the axis of the detection head is perpendicular to and intersects with the axis of the positioning groove. A positioning card slot is provided on the rear end surface of the detection head and is connected to the vision detection mechanism through the positioning card slot. A leaf spring electrode is provided at the position corresponding to the positioning groove on the front end surface of the detection head. The front half of the leaf spring electrode is located in the positioning groove and is coaxially distributed with the positioning groove, and the rear half is embedded in the detection head and is electrically connected to a contact electrode. The contact electrode is embedded outside the rear end surface of the detection head and is located in the positioning card slot, and the front end surface of the contact electrode extends at least 1 mm beyond the bottom of the positioning card slot. There are two guiding sliding grooves, which are symmetrically distributed on both sides of the axis of the belt conveyor and are parallel to the axis of the belt conveyor. At the same time, a strip electrode parallel to its axis is provided in each guiding sliding groove. The strip electrode is electrically connected to the drive circuit through a wire. There are at least two slider electrodes, which are respectively connected to the left end surface and the right end surface of the support plate, and their front end surfaces are located in the guiding sliding grooves, and are in contact with and slidably connected to the guiding sliding grooves and the strip electrodes. The slider electrodes and the strip electrodes are electrically connected to each other. At least one electric heating wire is further provided in the support plate, and at least one semiconductor refrigeration mechanism is provided on the lower end surface of the support plate. The number of temperature sensors is the same as the number of positioning grooves, and at least one temperature sensor is provided on the inner side surface of each positioning groove. The temperature sensors, the electric heating wire, and the semiconductor refrigeration mechanism are all electrically connected to the slider electrode.

6. A lithium battery cell detection system according to claim 5, characterized in that: The support plate is a "冂”-shaped groove-like structure in cross-section, and the semiconductor refrigeration mechanism is embedded in the groove body at its lower end and is connected to the groove bottom. The positioning groove is a groove-like structure in any one of the "凵”-shaped and "U”-shaped cross-sections.

7. A lithium battery cell detection system according to claim 1, characterized in that: The drive circuit is a circuit system based on a programmable controller, and a serial communication circuit and a control interface based on multi-touch are additionally provided.

8. The method for using a lithium battery cell detection system according to claim 1, characterized in that: The usage method of the lithium battery cell detection system includes the following steps: S1. System assembly. First, build the belt conveyor according to production needs, connect the front end of the belt conveyor to the lithium battery cell production line, and connect the rear end to the next process of the battery production line; then assemble and debug the vision detection mechanism, the synchronous detection mechanism, and the drive circuit with the belt conveyor to complete the system assembly operation; S2, pre-test adjustment: After completing step S1, the battery cells to be tested are loaded into the synchronous testing mechanism. The battery cells to be tested, after being clamped and positioned, are transported and transferred synchronously with the synchronous testing mechanism by a belt conveyor. During the transfer process, an electrical connection is established between the battery cells and the circuit is disconnected. On the other hand, the external ambient temperature of the battery cells is adjusted, and the battery cells to be tested are transferred under a constant temperature and pressure state. S3, inspection operation, when the synchronous inspection mechanism is transported by the belt conveyor to the position directly below the visual inspection mechanism, the visual inspection mechanism first inspects the initial external appearance, temperature, and high-temperature area distribution of the battery cell to be inspected; on the other hand, the inspection clamp of the visual inspection mechanism is clamped outside the inspection head of the synchronous inspection mechanism, abutted against and electrically connected to the contact electrode of the inspection head; then, on the one hand, the battery tester energizes and inspects the battery cell to be inspected; on the other hand, the horizontal drive column operates to drive the two inspection clamps to apply pressure to the battery cell to be inspected; finally, the pressure sensor inspects the compressive strength of the battery cell to be inspected; the battery tester inspects the resistivity, rated voltage, rated current, charge and discharge efficiency, heat generation, and short-circuit point of the battery cell, and transmits the inspection data to the drive circuit; S4, transportation and transfer. After completing the inspection in step S3, drive the visual inspection mechanism to run and disconnect the connection with the current synchronous inspection mechanism, and drive the current synchronous inspection mechanism to transport the inspected battery cells to the subsequent battery processing production line under the drive of the belt conveyor. At the same time, perform inspection operations on the battery cells to be inspected that are newly transported to the visual inspection mechanism.

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