Pole piece detection device

Abstract

The utility model provides a pole piece detection device which comprises a workbench, and further comprises a conveying mechanism, a detection mechanism, an illumination unit and an optical lens group which are arranged on the workbench, the conveying mechanism comprises a conveying line body, a detection jig conveyed by the conveying line body and a transparent placing part arranged on the detection jig, and the placing part is used for placing and fixing a to-be-detected pole piece; the detection mechanism, the illumination unit and the optical lens group are arranged on a pole piece conveying path of the conveying mechanism, the illumination unit can irradiate the optical lens group and the back surface of a conveyed to-be-detected pole piece, and the detection mechanism is provided with a front surface image acquisition unit and a back surface image acquisition unit; when the detection jig drives the to-be-detected pole piece to move along the pole piece conveying path, the front image acquisition unit is used for performing front detection on the to-be-detected pole piece, and the back image acquisition unit is used for detecting the back of the to-be-detected pole piece refracted and / or reflected by the optical lens group. The pole piece detection device provided by the utility model not only can ensure the detection efficiency, but also can improve the transfer precision and stability of the pole piece to be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a pole piece detection device. Background Art

[0002] During the production of lithium batteries, the quality and production efficiency of the lamination process play an extremely important role in improving the quality of lithium battery products and the overall production efficiency. At present, during the production of lithium batteries, lithium battery lamination equipment needs to detect defects on both the front and back sides of the pole piece to ensure the quality of the finished product. Existing pole piece defect detection equipment mainly uses a forward belt to detect the front of the pole piece, and an inverted belt to detect the back of the pole piece. That is, only by combining the forward belt and the inverted belt can the front and back sides of the pole piece be detected.

[0003] However, the existing electrode defect detection equipment uses an inverted belt to detect the back of the electrode, which requires the use of multiple belts. As a result, the electrode that passes the front detection needs to be transferred to the inverted belt for back detection, resulting in low detection efficiency. At the same time, the stability of the electrode transfer between the belts is poor, which also causes deviations in the accuracy and stability of the equipment in electrode transfer. Utility Model Content

[0004] In view of this, the utility model aims to provide a pole piece detection device, which has a better detection operation effect.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A pole piece detection device comprises a workbench, and also comprises a conveying mechanism, a detection mechanism, a lighting unit and an optical lens group arranged on the workbench;

[0007] The conveying mechanism includes a conveying line body, a detection fixture conveyed by the conveying line body, and a transparent placement portion provided on the detection fixture, wherein the placement portion is used to place and fix the electrode to be tested;

[0008] The detection mechanism, the lighting unit and the optical lens group are arranged on the electrode piece conveying path of the conveying mechanism, the lighting unit can illuminate the optical lens group and the back side of the electrode piece to be measured being conveyed, and the detection mechanism has a front image acquisition unit and a back image acquisition unit;

[0009] When the detection fixture drives the electrode to be tested to move along the electrode conveying path, the front image acquisition unit is used to perform front detection on the electrode to be tested, and the back image acquisition unit is used to detect the back side of the electrode to be tested refracted and / or reflected by the optical lens group.

[0010] Furthermore, the conveyor line includes a magnetic levitation guide rail and a mounting seat that is magnetically levitation movable on the magnetic levitation guide rail, and the detection fixture is arranged on the mounting seat.

[0011] Furthermore, the detection fixture includes two side panels arranged on the mounting seat, and the placement portion arranged on the top of the two side panels, and the lighting unit is arranged on at least one of the side panels.

[0012] Furthermore, the placement part includes a placement plate made of an acrylic plate, and a vacuum chamber arranged in the placement plate, and the top of the placement plate is provided with a plurality of adsorption holes connected to the vacuum chamber; a negative pressure device is provided on one of the side panels, and the negative pressure device is connected to the vacuum chamber.

[0013] Furthermore, an optical glass plate is provided on the placement plate, and the optical glass plate is provided with through holes corresponding to the adsorption holes one by one.

[0014] Furthermore, the negative pressure equipment includes a negative pressure pump arranged on the corresponding side panel, and a mobile power supply connected to the negative pressure pump.

[0015] Furthermore, a wireless charging module is provided on the magnetic levitation guide rail, the mobile power supply includes a rechargeable battery, and a wireless charging receiving module connected to the rechargeable battery, and the wireless charging module can charge the rechargeable battery through the wireless charging receiving module.

[0016] Furthermore, the optical lens assembly uses a reflector located below the placement plate, and the mirror surface of the reflector is arranged upward; the reflector is arranged on the mounting seat, and / or the reflector is arranged on the workbench through a supporting assembly, and one of the side panels is provided with an avoidance opening for avoiding the supporting assembly.

[0017] Furthermore, the front image acquisition unit and the back image acquisition unit are located above the detection jig, and the front image acquisition unit and the back image acquisition unit are arranged in sequence along the pole piece conveying path.

[0018] Furthermore, it also includes an electrode piece kicking mechanism arranged on the workbench; the electrode piece kicking mechanism includes a classification and collection platform arranged on one side of the conveying mechanism, and a kicking robot arranged between the classification and collection platform and the conveying mechanism, and the kicking robot is used to transfer the electrode piece to be tested with poor detection results on the detection fixture to the classification and collection platform.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The pole piece detection device described in the utility model can perform front detection on the pole piece to be detected through the front image acquisition unit when the detection fixture drives the pole piece to be detected to move along the pole piece conveying path, and detect the back of the pole piece to be detected refracted, reflected, or refracted and then reflected by the optical lens group through the back image acquisition unit, so that only the conveying mechanism needs to move along the pole piece conveying path to realize the front and back defect detection of the pole piece to be detected, thereby improving the detection efficiency. At the same time, it can also simplify the conveying mechanism and reduce the power cost, thereby improving the conveying accuracy and stability of the pole piece to be tested, so that the pole piece detection device has a better detection operation effect.

[0021] In addition, the conveying line is mainly composed of a magnetic levitation guide rail and a magnetic levitation movable mounting base, which can utilize the characteristics of high magnetic levitation conveying accuracy, good conveying stability and high conveying efficiency to improve the conveying accuracy and stability of the pole piece to be tested. The placement plate is made of acrylic plate, which can ensure the transparency of the placement plate, and facilitate the optical lens group to clearly refract, reflect, or refract and then reflect the back of the pole piece to be tested. The setting of the optical glass plate can ensure the tiling effect of the pole piece to be tested while ensuring clear reflection of the back of the pole piece to be tested. The negative pressure equipment is mainly composed of a negative pressure pump and a mobile power supply, which is conducive to improving the integration of the detection fixture and realizing the miniaturization design of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the pole piece detection device according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the detection fixture described in an embodiment of the utility model;

[0025] Figure 3 It is a principle diagram of the back side detection of the electrode piece to be tested according to the embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of a mobile power supply according to an embodiment of the utility model;

[0027] Description of reference numerals:

[0028] 11. Workbench;

[0029] 21. Conveyor line body; 211. Magnetic suspension guide rail; 2111. Wireless charging module; 212. Mounting seat; 22. Detection fixture; 221. Placement part; 2211. Placement plate; 2212. Optical glass plate; 2213. Top plate; 222. Side plate; 23. Negative pressure equipment; 231. Negative pressure pump; 232. Mobile power supply; 2321. Rechargeable battery; 2322. Wireless charging receiving module;

[0030] 31. Detection mechanism; 311. Front image acquisition unit; 312. Back image acquisition unit;

[0031] 41. lighting unit; 51. reflector; 61. pole piece to be tested;

[0032] 71. Pole scrapping mechanism; 711. Classification and collection platform; 712. Scrap kicking robot. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] This embodiment relates to a pole piece detection device, which can improve the detection efficiency and the conveying accuracy and stability of the pole piece 61 to be tested, compared with the method of using an inverted belt to detect the back of the pole piece in the traditional technology.

[0038] In terms of overall structure, Figures 1 to 4As shown, the electrode piece detection device of this embodiment includes a workbench 11, and also includes a conveying mechanism, a detection mechanism 31, a lighting unit 41 and an optical lens group arranged on the workbench 11. Among them, the conveying mechanism includes a conveying line body 21, a detection fixture 22 conveyed by the conveying line body 21, and a transparent placement portion 221 arranged on the detection fixture 22, and the placement portion 221 is used to place and fix the electrode piece 61 to be tested.

[0039] Among them, the detection mechanism 31, the lighting unit 41 and the optical lens group are arranged on the electrode conveying path of the conveying mechanism. The lighting unit 41 can illuminate the optical lens group and the back side of the electrode 61 to be conveyed. The detection mechanism 31 has a front image acquisition unit 311 and a back image acquisition unit 312.

[0040] Furthermore, when the detection fixture 22 drives the electrode piece 61 to be tested to move along the electrode piece conveying path, the front image acquisition unit 311 is used to perform front detection on the electrode piece 61 to be tested, and the back image acquisition unit 312 is used to detect the back side of the electrode piece 61 to be tested that is refracted, reflected, or refracted and then reflected by the optical lens group.

[0041] Specifically, in this embodiment, as an exemplary structure, Figure 1 As shown, the conveying line body 21 includes a magnetic suspension rail 211 and a mounting seat 212 that is magnetically suspended and movable on the magnetic suspension rail 211 , and the detection fixture 22 is disposed on the mounting seat 212 .

[0042] It can be understood that the conveying line body 21 is mainly composed of a magnetic levitation guide rail 211 and a magnetic levitation movable mounting seat 212, and can utilize the characteristics of high magnetic levitation conveying accuracy, good conveying stability and high conveying efficiency to improve the conveying accuracy and stability of the pole piece 61 to be tested.

[0043] Furthermore, in this embodiment, as a preferred implementation form, Figure 2 As shown, the detection fixture 22 includes two side panels 222 disposed on the mounting seat 212 , and a placement portion 221 disposed on the top of the two side panels 222 , and the lighting unit 41 is disposed on at least one of the side panels 222 .

[0044] In the specific structure, the lighting unit 41 of this embodiment can be arranged on the inner side of one of the side panels 222, for example. Figure 2 In the state shown, the lighting unit 41 is disposed on the inner side of the left side panel 222 , and the lighting unit 41 can be a common LED lamp.

[0045] Taking into account the need to detect the back side of the electrode piece 61 to be tested, in this embodiment, as a preferred implementation form, the placement portion 221 includes a placement plate 2211 made of an acrylic plate, and a vacuum chamber arranged in the placement plate 2211, and a plurality of adsorption holes connected to the vacuum chamber are provided on the top of the placement plate 2211, so as to facilitate the adsorption of the electrode piece 61 to be tested on the placement plate 2211, thereby ensuring the detection effect.

[0046] At the same time, as a preferred implementation form, in this embodiment, a negative pressure device 23 is provided on one of the side plates 222, and the negative pressure device 23 is connected to the vacuum chamber. Here, the placement plate 2211 is made of an acrylic plate, which can ensure the transparency of the placement plate 2211, which is conducive to the optical lens group to clearly refract, reflect, or refract and then reflect the back of the electrode piece 61 to be tested.

[0047] Of course, in the specific implementation, the acrylic sheet of this embodiment can be an acrylic sheet with high transparency well known to those skilled in the art, such as an optical grade acrylic sheet. Figure 2 In the state shown, when the lighting unit 41 is arranged on the inner side of the left side plate 222 , the negative pressure device 23 may preferably be arranged on the outer side of the right side plate 222 .

[0048] Furthermore, in this embodiment, as a preferred implementation form, an optical glass plate 2212 is provided on the placement plate 2211, and through holes corresponding to the adsorption holes are provided on the optical glass plate 2212. Thus, the tiling effect of the electrode piece 61 to be tested can be ensured while ensuring clear reflection on the back of the electrode piece 61 to be tested.

[0049] Moreover, it should be mentioned that although the transparency of the acrylic plate can also meet the detection of the back of the electrode 61 to be tested, the acrylic plate has a low hardness and is easily scratched, so the optical glass plate 2212 is added to have a higher hardness and clarity to ensure the detection effect. The optical glass plate 2212 here is made of optical glass well known to those skilled in the art.

[0050] In addition, in this embodiment, when necessary, the placement plate 2211 can be set on the two side plates 222 through the top plate 2213 to improve the safety of using the placement plate 2211 and the optical glass plate 2212. At this time, the top plate 2213 is hollowed out, the edge of the placement plate 2211 is installed on the top plate 2213, and the electrode piece 61 to be tested placed on the placement plate 2211 is completely exposed in the hollow part of the top plate 2213.

[0051] In this embodiment, as a preferred implementation form, the negative pressure device 23 includes a negative pressure pump 231 provided on the corresponding side plate 222, and a mobile power supply 232 connected to the negative pressure pump 231. It can be understood that the negative pressure device 23 is mainly composed of the negative pressure pump 231 and the mobile power supply 232, which is conducive to improving the integration of the detection fixture 22 and realizing the miniaturization design of the device.

[0052] In addition, in this embodiment, as a preferred implementation form, Figure 4 As shown, a wireless charging module 2111 is provided on the magnetic levitation guide rail 211, and the mobile power supply 232 includes a rechargeable battery 2321 and a wireless charging receiving module 2322 connected to the rechargeable battery 2321, and the wireless charging module 2111 can charge the rechargeable battery 2321 through the wireless charging receiving module 2322.

[0053] The advantage of this arrangement is that the mobile power supply 232 can be charged during the process of the conveyor line 21 conveying the detection fixture 22 to ensure that it has sufficient power to drive the negative pressure pump 231, thereby ensuring the adsorption effect of the electrode 61 to be tested and the flattening effect of the electrode 61 to be tested.

[0054] It is worth noting that the relevant structural parts not mentioned in the mobile battery wireless charging part of this embodiment can refer to the common wireless charging devices in the prior art. For example, the wireless charging module 2111 also includes a power conversion module and a wireless charging transmitting module connected to the power conversion module.

[0055] The power conversion module is used to convert AC voltage into DC voltage. The wireless charging transmitter module receives the DC voltage output by the power conversion module and transmits an electromagnetic signal. The wireless charging receiving module 2322 is used to receive the electromagnetic signal transmitted by the wireless charging transmitter module and generate AC voltage through the principle of electromagnetic induction, thereby outputting the charging voltage to the rechargeable battery 2321.

[0056] Furthermore, in this embodiment, as a preferred implementation form, the optical lens assembly adopts a reflector 51 located below the placement plate 2211 , and the mirror surface of the reflector 51 is arranged upward, and the reflector 51 is arranged on the mounting seat 212 .

[0057] Therefore, the reflector 51 follows the detection fixture 22, which is beneficial to improving the overall integration of the device.

[0058] Of course, the reflector 51 can be a common optical reflector. In addition to the reflector 51, the optical lens assembly can also use an optical prism (mainly used to refract the back of the pole piece 61 to be measured), especially a reflection prism (mainly used to reflect the back of the pole piece 61 to be measured after refraction). At the same time, the specific arrangement of the optical prism can be set and adjusted according to the actual refraction or refraction after reflection requirements.

[0059] In addition to being disposed on the mounting base 212, the reflector 51 of this embodiment can also be directly disposed on the workbench 11 as a preferred implementation form. Specifically, the reflector 51 is disposed on the workbench 11 through a supporting assembly, and a clearance opening for avoiding the supporting assembly is provided on one of the side panels 222.

[0060] It should be mentioned that this arrangement of the above-mentioned reflector 51 requires a avoidance opening to be opened on one of the side plates 222 (which passes through the side plate 222 on the electrode conveying path), which is more likely to reduce the supporting effect of the placement portion 221 than the method of setting it on the mounting seat 212.

[0061] In this embodiment, as a preferred implementation form, continue to refer to Figure 1 As shown in the figure, the front image acquisition unit 311 and the back image acquisition unit 312 are located above the detection fixture 22, and the front image acquisition unit 311 and the back image acquisition unit 312 are arranged in sequence along the electrode conveying path to achieve a one-time detection of the front and back sides of the electrode 61 to be tested.

[0062] At this time, refer to Figure 3 As shown, the dotted line between the reflector 51 and the placement portion 221 is the optical path of the back image acquisition unit 312. When the conveyor line 21 transports the inspection fixture 22 along the electrode conveying path and moves through the back image acquisition unit 312, the image of the back side of the electrode 61 to be tested is reflected by the reflector 51 into the back image acquisition unit 312.

[0063] Furthermore, when the optical glass plate 2212 moves from the solid line position (left side) to the dotted line position (right side), the back image acquisition unit 312 scans the back side of the entire electrode piece 61 to be tested to complete the back defect detection. The front image acquisition unit 311 and the back image acquisition unit 312 here can preferably adopt a line scan camera or a line scan camera well known to those skilled in the art.

[0064] In addition, in this embodiment, as a preferred implementation form, Figure 1As shown, it also includes a pole piece kicking mechanism 71 disposed on the workbench 11. The pole piece kicking mechanism 71 includes a classification collection platform 711 disposed on one side of the conveying mechanism, and a kicking manipulator 712 disposed between the classification collection platform 711 and the conveying mechanism, and the kicking manipulator 712 is used to transfer the pole piece 61 to be tested with a bad test result on the testing fixture 22 to the classification collection platform 711.

[0065] The waste kicking robot 712 and the classification collection platform 711 here can adopt related products familiar to technical personnel in this field. For example, the waste kicking robot 712 adopts a surrounding robot with an adsorption fixture (for sucking the electrode), and the classification collection platform 711 can adopt a electrode collection platform that can be raised and lowered.

[0066] The electrode detection device of the present embodiment can perform front detection on the electrode piece 61 to be detected through the front image acquisition unit 311, and detect the back side of the electrode piece 61 to be detected that is refracted, reflected, or refracted and then reflected by the optical lens group through the back image acquisition unit 312 when the detection fixture 22 drives the electrode piece 61 to be detected along the electrode piece conveying path. This allows the conveying mechanism to move along the electrode piece conveying path only to realize front and back defect detection of the electrode piece 61 to be tested, thereby improving the detection efficiency. At the same time, the conveying mechanism can be simplified and the power cost can be reduced, thereby improving the conveying accuracy and stability of the electrode piece 61 to be tested, so that the electrode detection device has a better detection operation effect.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pole piece detection device, comprising a workbench, characterized in that: It also includes a conveying mechanism, a detection mechanism, a lighting unit and an optical lens group arranged on the workbench; The conveying mechanism includes a conveying line body, a detection fixture conveyed by the conveying line body, and a transparent placement portion provided on the detection fixture, wherein the placement portion is used to place and fix the electrode to be tested; The detection mechanism, the lighting unit and the optical lens group are arranged on the electrode piece conveying path of the conveying mechanism, the lighting unit can illuminate the optical lens group and the back side of the electrode piece to be measured being conveyed, and the detection mechanism has a front image acquisition unit and a back image acquisition unit; When the detection fixture drives the electrode to be tested to move along the electrode conveying path, the front image acquisition unit is used to perform front detection on the electrode to be tested, and the back image acquisition unit is used to detect the back side of the electrode to be tested refracted and / or reflected by the optical lens group.

2. The pole piece detection device according to claim 1, characterized in that: The conveying line body comprises a magnetic suspension guide rail and a mounting seat which is magnetically suspended and movable on the magnetic suspension guide rail, and the detection fixture is arranged on the mounting seat.

3. The pole piece detection device according to claim 2, characterized in that: The detection fixture includes two side panels arranged on the mounting seat, and the placement portion arranged on the top of the two side panels, and the lighting unit is arranged on at least one of the side panels.

4. The pole piece detection device according to claim 3, characterized in that: The placement part includes a placement plate made of an acrylic plate, and a vacuum chamber arranged in the placement plate, and a plurality of adsorption holes communicating with the vacuum chamber are arranged on the top of the placement plate; A negative pressure device is provided on one of the side panels, and the negative pressure device is communicated with the vacuum chamber.

5. The pole piece detection device according to claim 4, characterized in that: An optical glass plate is arranged on the placement plate, and through holes corresponding to the adsorption holes are arranged on the optical glass plate.

6. The pole piece detection device according to claim 4, characterized in that: The negative pressure equipment includes a negative pressure pump arranged on the corresponding side plate, and a mobile power source connected to the negative pressure pump.

7. The pole piece detection device according to claim 6, characterized in that: The magnetic levitation guide rail is provided with a wireless charging module, the mobile power supply includes a rechargeable battery and a wireless charging receiving module connected to the rechargeable battery, and the wireless charging module can charge the rechargeable battery through the wireless charging receiving module.

8. The pole piece detection device according to claim 4, characterized in that: The optical lens assembly uses a reflector located below the placement plate, and the mirror surface of the reflector is arranged upward; The reflector is arranged on the mounting seat, and / or the reflector is arranged on the workbench through a supporting assembly, wherein a avoiding opening for avoiding the supporting assembly is provided on one of the side panels.

9. The pole piece detection device according to claim 1, characterized in that: The front image acquisition unit and the back image acquisition unit are located above the detection fixture, and the front image acquisition unit and the back image acquisition unit are arranged in sequence along the pole piece conveying path.

10. The pole piece detection device according to any one of claims 1 to 9, characterized in that: It also includes a pole piece kicking mechanism disposed on the workbench; The electrode piece kicking mechanism includes a classification and collection platform arranged on one side of the conveying mechanism, and a kicking robot arranged between the classification and collection platform and the conveying mechanism, wherein the kicking robot is used to transfer the electrode piece to be tested with a poor test result on the testing fixture to the classification and collection platform.

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