Battery cell polishing detection device

Abstract

The utility model discloses a battery cell polishing and detecting device, which comprises a conveying device, a polishing device and a detection device, the first polishing unit is arranged on the conveying path of the conveying device, the first polishing unit comprises first polishing pieces and first end polishing pieces, the first polishing pieces are used for polishing the battery cell, the first polishing pieces are arranged on the two sides of the battery cell in the first direction, and the first end polishing pieces are located on the bottom surface of the battery cell; the second grinding unit is arranged on the conveying path of the conveying device, the second grinding unit comprises second grinding pieces used for grinding the battery cell and second end grinding pieces, the second grinding pieces are arranged on the two sides, in the second direction, of the battery cell, and the second end grinding pieces are located at the top of the battery cell; and the first detection lens is arranged on the discharging side of the conveying device and is used for detecting the surface of the battery cell. According to the device, the one-time passing rate of a subsequent film coating procedure is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cell grinding, and specifically relates to a battery cell grinding and detecting device. Background Art

[0002] Under the good development trend of new energy batteries, as an important part of new energy batteries, the preparation process of battery cells has received great attention. Inevitably, battery cells will come into contact with corrosive liquids, high-temperature environments, or be scratched or bumped during the preparation process, thus accelerating the oxidation rate of the battery cell shell. For example, the HF gas volatilized from the electrolyte during the battery cell injection process is corrosive. After the battery cell terminal is oxidized, solid crystals will form on the surface. When the terminals in the manufacturing process are connected in series by welding, poor surface quality of the terminals will lead to over-welding or virtual welding, resulting in excessive internal resistance, large current, and rapid temperature rise. Seriously, it will cause a safety accident of thermal runaway of the whole package. Therefore, it is very necessary to grind and clean the battery cells before film coating.

[0003] Currently, most companies in the industry use manual visual inspection to check the battery cells after grinding and cleaning, and pick out the battery cells that are not cleaned thoroughly for rework. However, with the increase in working hours of manual visual inspection, employees will have visual fatigue and their working state will decline, resulting in unstable factors such as missed inspection. And for the battery cells with residual dirt on the terminals not completely cleaned, there will be a risk of large internal resistance, rapid temperature rise, and thermal runaway after the subsequent module pack integration work is completed and put into production application. Content of the Utility Model

[0004] In order to overcome the defects in the prior art, the utility model provides a battery cell grinding and detecting device, which effectively improves the first-pass rate of the subsequent film coating process.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a battery cell grinding and detecting device, including:

[0006] A frame, wherein a conveying device is arranged on the frame, and the conveying device is used for conveying battery cells;

[0007] A first grinding unit, connected to the frame, the first grinding unit is arranged on the conveying path of the conveying device, the first grinding unit includes a first grinding member for grinding the battery cell and a first end grinding member, the first grinding member is arranged on both sides of the battery cell along a first direction, and the first end grinding member is located at the bottom surface of the battery cell;

[0008] A second grinding unit, connected to the frame, the second grinding unit is arranged on the conveying path of the conveying device, the second grinding unit includes a second grinding member for grinding the battery cell and a second end grinding member, the second grinding member is arranged on both sides of the battery cell along a second direction, and the second end grinding member is located at the top of the battery cell;

[0009] The first detection lens is connected to the frame and is disposed on the discharge side of the conveying device for detecting the surface of the battery cell.

[0010] The battery cell polished by the first polishing unit and the second polishing unit is detected by the first detection lens. If there is no abnormality, the conveying device conveys the battery cell to the next station. If there is an abnormality, the device alarms and determines that the battery cell is unqualified.

[0011] Through the above solution, the polished battery cell needs to be detected by the first detection lens and will only be sent to the next station for film coating after the detection is normal, avoiding the waste of blue film and top cover patch caused by sending the abnormal battery cell to the next station for film coating.

[0012] Among them, no abnormality means that there are no scratches or foreign objects on the surface of the battery cell.

[0013] Furthermore, it further includes a second detection lens. The second detection lens is connected to the frame and is disposed on the incoming material side of the conveying device for detecting whether there is an abnormality on the surface of the battery cell;

[0014] If the battery cell is detected as normal by the second detection lens, only the first polishing unit is started to polish the bottom of the battery cell. After polishing, the conveying device directly conveys the battery cell to the next station. If the battery cell is detected as abnormal by the second detection lens, the first polishing unit and the second polishing unit are started to polish the battery cell.

[0015] Through the above solution, the second detection lens is used to detect the battery cell once before polishing. If there is no abnormality, the side polishing process can be omitted, improving the production efficiency.

[0016] Furthermore, the first polishing unit and the second polishing unit further include a dust removal cover. The inlet of the dust removal cover faces the battery cell, and the outlet of the dust removal cover is connected to a vacuum negative pressure pipeline. The dust removal cover is used to suck the dust generated during the polishing process.

[0017] Furthermore, the first polishing member, the first end polishing member, the second polishing member and the second end polishing member include felt rollers. The roller shafts of the felt rollers are connected to the frame, and the felts of the felt rollers are replaceable. As the use time increases, the polishing effect of the polishing equipment will become lower and lower. The replaceable felt design enables regular replacement according to its service life to ensure the polishing effect.

[0018] Furthermore, it includes a clamping jaw. The clamping jaw is connected to a robotic arm, and the robotic arm is used to drive the clamping jaw to move the battery cell to the felt roller for polishing.

[0019] Further, it further includes a programmable logic controller. The conveying device, the first grinding unit, the second grinding unit, the first detection lens, and the second detection lens are all connected to the programmable logic controller. The programmable logic controller controls the cooperation of the conveying device, the first grinding unit, the second grinding unit, the first detection lens, and the second detection lens to complete the grinding and detection of the battery cell.

[0020] Further, it includes at least three of the first detection lenses, and the first detection lenses are arranged on at least three sides of the battery cell.

[0021] Further, it includes at least three of the second detection lenses, and the second detection lenses are arranged on at least three sides of the battery cell. The first detection lens and the second detection lens identify whether there are scratches or foreign objects on the surface of the battery cell through functions such as color difference monitoring and gray scale monitoring.

[0022] Further, it further includes a three-color lamp, and the three-color lamp is connected to the programmable logic controller. If the battery cell grinding and detection device is in the standby shutdown state, the three-color lamp lights yellow. If the second detection lens detects that the battery cell is normal, the three-color lamp lights green. If the second detection lens detects that the battery cell has an abnormality, the three-color lamp lights red.

[0023] By means of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0024] 1. In this application, the ground battery cell is detected by the first detection lens. Only after the detection is normal will it be sent to the next station for film wrapping, avoiding sending the abnormal battery cell to the next station for film wrapping, effectively improving the first-pass rate of the subsequent film wrapping process, and improving the material utilization rate of covering the blue film and top cover patching.

[0025] 2. In this application, the battery cell is detected by the second detection lens before grinding. If the battery cell is detected to be normal, only the bottom of the battery cell needs to be ground by the first grinding unit, and then the battery cell can be conveyed to the next station, avoiding ineffective grinding of qualified battery cells and improving production efficiency.

[0026] To make the above and other purposes, features, and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given, and detailed descriptions are made in conjunction with the accompanying drawings as follows. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is a schematic diagram of the overall structure of the battery cell grinding and detection device in an embodiment of the present utility model;

[0029] Figure 2 is a perspective view of the battery cell grinding and detection device in an embodiment of the present utility model.

[0030] Reference numerals of the above-mentioned drawings: 1, conveyor belt; 2, second detection lens 2; 31, first felt roller; 31, second felt roller; 33, third felt roller; 34, fourth felt roller; 35, dust hood; 351, vacuum negative pressure pipeline; 4, clamping jaw; 5, first detection lens; 10, battery cell. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that in the description of the present utility model, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects, and there is no sequence between them, nor can they be understood as indicating or implying relative importance. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0033] Embodiment: In combination with Figure 1-2 as shown, a battery cell grinding and detection device is disclosed in this embodiment, including:

[0034] A frame (not shown in the figure), the frame is provided with a conveyor belt 1, and the conveyor belt 1 is used to convey the battery cell 10.

[0035] On the feeding side of the conveyor belt 1, three second detection lenses 2 are provided, and the three second detection lenses 2 are respectively located on both sides and the top of the conveyor belt 1. The second detection lens 2 is fixed on the frame. The second detection lens 2 can effectively identify abnormalities such as scratches and surface dirt on the battery cell during the manufacturing process according to the functions of color difference monitoring and gray scale monitoring. The battery cell 10 is detected by the second detection lens 2 before grinding. If the battery cell 10 is detected to be normal, only the bottom surface of the battery cell 10 is ground, and after grinding, it is directly conveyed to the next process for film coating. If the battery cell 10 is detected to have abnormalities, the first grinding unit and the second grinding are used to grind it.

[0036] Through the above solution, the second detection lens 2 is used to detect the battery cell 10 once before polishing. If there is no abnormality, the side polishing process can be omitted, improving the production efficiency.

[0037] Among them, no abnormality means that there are no scratches or foreign objects on the surface of the battery cell. Having an abnormality means that there are scratches or foreign objects on the surface of the battery cell.

[0038] The first polishing unit is arranged along the conveying direction of the conveyor belt 1. The first polishing unit is used to polish both sides of the battery cell 10 along the first direction and the bottom surface of the battery cell 10. The first polishing unit includes two first felt rollers 31 arranged on both sides of the battery cell 10 along the first direction, and a second felt roller 32 arranged on the bottom surface of the battery cell 10. Among them, the roller shaft of the felt roller is fixedly connected to the frame, and the felt of the felt roller is detachably connected to the roller shaft. Because as the use time increases, the polishing effect of the felt will become lower and lower, so this application provides replaceable felt, enabling it to be replaced regularly according to the service life to ensure the polishing effect.

[0039] Optionally, both the first felt roller 31 and the second felt roller 32 are arranged in a dust removal cover 35. The inlet of the dust removal cover 35 faces the felt roller, and the outlet of the dust removal cover 35 is connected to a vacuum negative pressure pipeline 351. The dust removal cover 35 is used to suck the dust generated during the polishing process.

[0040] The second polishing unit is arranged along the conveying direction of the conveyor belt 1 and is located behind the first polishing unit. The second polishing unit is used to polish both sides of the battery cell 10 along the second direction and the top of the battery cell 10. The second polishing unit includes two third felt rollers 33 arranged on both sides of the battery cell 10 along the second direction, and a fourth felt roller 34 arranged on the top of the battery cell 10. Among them, the roller shaft of the felt roller is fixedly connected to the frame, and the felt of the felt roller is detachably connected to the roller shaft.

[0041] Both the third felt roller 33 and the fourth felt roller 34 are arranged in the dust removal cover 35. The inlet of the dust removal cover 35 faces the felt roller, and the outlet of the dust removal cover 35 is connected to a vacuum negative pressure pipeline 351. The dust removal cover 35 is used to suck the dust generated during the polishing process.

[0042] Among them, as Figure 1 shown, the first direction is the width direction of the conveyor belt 1, and the second direction is the conveying direction of the conveyor belt 1.

[0043] There are two grippers 4 connected to the frame by a robotic arm. The two grippers 4 are respectively located at the first grinding unit and the second grinding unit. The gripper 4 is driven by a cylinder and is used to grip the battery cell 10. The robotic arm can drive the gripper 4 to bring the battery cell 10 close to the first grinding unit or the second grinding unit to achieve grinding.

[0044] Three first detection lenses 5 are provided on the discharge side of the conveyor belt 1. The three first detection lenses 5 are respectively located on both sides and the top of the conveyor belt 1. The first detection lens 5 is fixed on the frame. Based on the color difference monitoring and gray-scale monitoring functions, the first detection lens 5 can effectively identify abnormalities such as scratches and surface dirt on the battery cell during the manufacturing process.

[0045] Among them, the color difference detection function is based on the principle of spectrophotometry, which can accurately measure the color and gloss of an object. By performing operations such as reflection, transmission, or scattering on the object, it provides accurate chromaticity coordinates and chromaticity diagrams to monitor the color quality of the product. The gray-scale monitoring function includes gray-scale processing of the images detected by the first detection lens 5 and the second detection lens 2, so as to facilitate the identification of whether there are scratches or foreign objects on the surface of the battery cell 6.

[0046] The battery cell 10 polished by the first grinding unit and the second grinding unit is detected by the first detection lens 5 again. If there is no abnormality, the conveyor belt 1 conveys the battery cell 10 to the next station. If there is an abnormality, the device alarms and determines that the battery cell is unqualified. Through the above solution, the polished battery cell 10 needs to be detected by the first detection lens 5, and it will only be sent to the next station for film coating after the detection is normal, avoiding the waste of blue film and top cover patch caused by sending the abnormal battery cell 10 to the next station for film coating.

[0047] It should be noted that a programmable logic controller is provided on the frame. The conveyor device, the first grinding unit, the second grinding unit, the first detection lens 5, and the second detection lens 2 are all connected to the programmable logic controller. The programmable logic controller controls the conveyor device, the first grinding unit, the second grinding unit, the first detection lens 5, and the second detection lens 2 to cooperate to complete the grinding and detection of the battery cell.

[0048] The programmable logic controller is also connected to a three-color lamp. The three-color lamp is connected to the programmable logic controller. If the battery cell grinding and detection device is in the standby shutdown state, the three-color lamp lights yellow. If the second detection lens 2 detects that the battery cell 10 is normal, the three-color lamp lights green. If the second detection lens 2 detects that there is an abnormality in the battery cell, the three-color lamp lights red to prompt an alarm.

[0049] Specific embodiments are applied in the present utility model to elaborate on the principles and implementation manners of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A cell grinding and detecting device, characterized in that, Comprising: A conveying device for conveying battery cells. A first grinding unit disposed on the conveying path of the conveying device. The first grinding unit includes a first grinding member for grinding the battery cell and a first end grinding member. The first grinding member is disposed on both sides of the battery cell along a first direction, and the first end grinding member is located at the bottom surface of the battery cell. A second grinding unit disposed on the conveying path of the conveying device. The second grinding unit includes a second grinding member for grinding the battery cell and a second end grinding member. The second grinding member is disposed on both sides of the battery cell along a second direction, and the second end grinding member is located at the top of the battery cell. A first detection lens disposed on the discharging side of the conveying device for detecting the surface of the battery cell.

2. The core grinding and detection device according to claim 1, characterized in that, Further comprising a second detection lens disposed on the feeding side of the conveying device for detecting the surface of the battery cell.

3. The cell grinding and detecting device according to claim 1, wherein The first grinding unit and the second grinding unit further include a dust removal cover. The inlet of the dust removal cover faces the battery cell, and the outlet of the dust removal cover is connected to a vacuum negative pressure pipeline.

4. The cell grinding and inspection device according to claim 1, characterized in that, The first grinding member, the first end grinding member, the second grinding member, and the second end grinding member include felt rollers. The roller shafts of the felt rollers are connected to the machine frame, and the felt of the felt rollers is replaceable.

5. The cell grinding and detecting device according to claim 4, characterized in that, Comprising a clamping jaw connected to a robotic arm. The robotic arm is used to drive the clamping jaw to move the battery cell to the felt roller for grinding.

6. The cell grinding and detecting device according to claim 2, wherein, Further comprising a programmable logic controller. The conveying device, the first grinding unit, the second grinding unit, the first detection lens, and the second detection lens are all connected to the programmable logic controller. The programmable logic controller controls the cooperation of the conveying device, the first grinding unit, the second grinding unit, the first detection lens, and the second detection lens to complete the grinding and detection of the battery cell.

7. The cell grinding and detection device according to claim 1, wherein, Comprising at least three of the first detection lenses, and the first detection lenses are disposed on at least three sides of the battery cell.

8. The cell grinding and detecting device according to claim 2, wherein, Comprising at least three of the second detection lenses, and the second detection lenses are disposed on at least three sides of the battery cell.

9. The cell grinding and detecting device according to claim 6, wherein, Further comprising a three-color lamp connected to the programmable logic controller. If the battery cell grinding and detection device is in a standby shutdown state, the three-color lamp lights yellow. If the second detection lens detects no abnormality in the battery cell, the three-color lamp lights green. If the second detection lens detects an abnormality in the battery cell, the three-color lamp lights red.

Images