Lithium battery positive and negative pole piece conveying mechanism with deviation rectifying function

Abstract

The invention relates to a lithium battery positive and negative pole piece conveying mechanism with a deviation rectifying function, and belongs to the field of lithium battery production equipment.The lithium battery positive and negative pole piece conveying mechanism comprises a rack, and a first conveying roller, a second conveying roller and a third conveying roller are sequentially arranged on the rack from left to right; the first conveying roller, the second conveying roller and the third conveying roller are arranged in the front-back direction and located at the same horizontal height. A deviation correction station is formed between the first conveying roller and the second conveying roller, and a detection station is formed between the second conveying roller and the third conveying roller; the rack is further provided with a first detection device, the first detection device is located at the detection station, and the first detection device comprises a front detection assembly and a rear detection assembly; a deviation rectifying device is further arranged on the machine frame and located on the deviation rectifying station, the deviation rectifying device comprises a deviation rectifying roller arranged in the front-back direction, the rear end of the deviation rectifying roller is connected to the machine frame in a pivoted mode through a first installation frame, and the front end of the deviation rectifying roller is arranged on the machine frame in a lifting mode through a second installation frame. The lower end of the deviation rectifying roller is located above the lower end of the first conveying roller. The coating precision of the coating equipment can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery production equipment, and particularly to a conveying mechanism for positive and negative electrode sheets of a lithium battery with a deviation correction function. Background Art

[0002] Lithium batteries are one of the most common batteries at present. They have the characteristics of small size, light weight, high energy density, long service life, etc., and are widely used in fields such as mobile devices, electric vehicles, and energy storage systems.

[0003] In the production process of lithium batteries, the coating process of positive and negative electrode sheets is an important link. The lithium battery coating process refers to coating active materials on the surfaces of the positive and negative electrode materials of lithium batteries to improve the capacity and performance of lithium batteries to a certain level to meet specific usage requirements. During this process, it is necessary to precisely control the thickness, uniformity, density, and chemical composition of the coating to ensure that the lithium battery has stable performance. However, in the actual production process, when continuously coating the positive and negative electrode sheets, due to mechanical errors, guide roller deviations, vibrations, and fluctuations in the tension of the electrode sheets in the equipment unit, the electrode sheets will deviate, resulting in misalignment during the coating process, seriously affecting the coating quality of the positive and negative electrode sheets.

[0004] Based on this, the present invention provides a conveying mechanism for positive and negative electrode sheets of a lithium battery with a deviation correction function, which is used to correct the position of the positive and negative electrode sheets during the conveying process, so that the position of the positive and negative electrode sheets is fixed when they reach the coating equipment, thereby achieving the purpose of improving the coating accuracy of the positive and negative electrode sheets. Summary of the Invention

[0005] Based on this, it is necessary to provide a conveying mechanism for positive and negative electrode sheets of a lithium battery with a deviation correction function, including a frame. A first conveying roller, a second conveying roller, and a third conveying roller are sequentially arranged on the frame from left to right. The first conveying roller, the second conveying roller, and the third conveying roller are all arranged along the front-rear direction and are at the same horizontal height. A deviation correction station is formed between the first conveying roller and the second conveying roller, and a detection station is formed between the second conveying roller and the third conveying roller. A first detection device is further arranged on the frame, and the first detection device is located at the detection station. The first detection device includes a detection component arranged in the front-rear direction. A deviation correction device is further arranged on the frame, and the deviation correction device is located at the deviation correction station. The deviation correction device includes a deviation correction roller arranged along the front-rear direction. The rear end of the deviation correction roller is pivotally connected to the frame through a first mounting bracket, and the front end of the deviation correction roller is arranged on the frame in a liftable manner through a second mounting bracket. The lower end of the deviation correction roller is located above the lower end of the first conveying roller.

[0006] The present invention is used for the transportation of the positive or negative electrode sheets to be coated, and is used to transport them to the coating equipment for coating. The path of the positive / negative electrode sheets passing through the present invention is as follows: First, pass through the lower end of the first conveying roller and then through the first conveying roller, then pass through the upper end of the deviation rectifying roller and then through the deviation rectifying roller, then pass through the lower end of the second conveying roller and then through the second conveying roller, and then pass through the upper end of the third conveying roller and then through the third conveying roller. It should be noted that when using the present invention, after the positive / negative electrode sheet passing through the third conveying roller is installed on the coating equipment, the positive / negative electrode sheet between the third conveying roller and the coating equipment needs to be in a tensioned state.

[0007] In the present invention, the detection positions of the two detection components of the first detection device need to be set at preset positions. The preset positions are the positions where the front and rear edges of the positive / negative electrode sheet are located when the positive / negative electrode sheet does not shift. Therefore, if the positive / negative electrode sheet shifts during transportation, it will be detected by the first detection device. After the two detection components of the first detection device detect the positive / negative electrode sheet, they will send signals to the deviation rectifying device. At this time, the deviation rectifying device can perform real-time deviation rectifying processing on the positive / negative electrode sheet being transported according to the detection structure of the first detection device. Specifically, if the front detection component detects the positive / negative electrode sheet, the front end of the deviation rectifying roller will gradually rise (the deviation rectifying roller with the front end rising will push the positive / negative electrode sheet backward) until the front detection component no longer detects the positive / negative electrode sheet. At this time, the positive / negative electrode sheet returns to the preset position; if the rear detection component detects the positive / negative electrode sheet, the front end of the deviation rectifying roller will gradually descend (the deviation rectifying roller with the front end descending will cause the positive / negative electrode sheet on it to slide forward under the action of tension) until the rear detection component no longer detects the positive / negative electrode sheet.

[0008] It can be seen that the present invention can perform real-time deviation rectifying processing on the positive / negative electrode sheet during transportation, that is, the present invention can make the positive / negative electrode sheet always be in the preset position when being transported to the coating equipment, which can effectively ensure the coating accuracy of the coating equipment and improve the coating equipment for the positive / negative electrode sheet.

[0009] Further, mounting shafts are fixedly arranged at both ends of the deviation rectifying roller, and the mounting shafts are coaxially arranged with the deviation rectifying roller; the first mounting frame includes a first base fixedly arranged on the machine frame, a first mounting seat is pivotally connected to the first base, and the connecting shaft at the rear end of the deviation rectifying roller is rotatably arranged on the first mounting seat through a bearing structure; the second mounting frame includes a second base fixedly arranged on the machine frame, a mounting platform is arranged on the second base in a liftable manner through a servo cylinder, a second mounting seat is pivotally connected to the mounting platform, a jack penetrating through the second mounting seat is formed on the second mounting seat corresponding to the mounting shaft at the front end of the deviation rectifying roller, and the mounting shaft at the front end of the deviation rectifying roller is inserted into the jack and is slidably matched with the jack; the servo cylinder is communicatively connected with the detection component of the first detection device.

[0010] In the present invention, the servo cylinder on the second base can drive the front end of the deviation rectifying roller to move up and down by driving the mounting platform to move up and down, so as to realize the deviation rectifying function of the deviation rectifying roller for the positive / negative electrode plates. During this process, the front end of the deviation rectifying roller will drive the second mounting seat to rotate relative to the mounting platform. At the same time, the deviation rectifying roller changes the upper end of the deviation rectifying roller located between the first mounting seat and the second mounting seat by the front-and-back movement of its front mounting shaft in the jack of the second mounting seat, so that the front end of the deviation rectifying roller can move up and down smoothly.

[0011] Further, a pressing roller is rotatably arranged on the machine frame, and the pressing roller is arranged above the third conveying roller and is matched with the third conveying roller.

[0012] In the present invention, the position of the pressing roller needs to be adjusted according to the thickness of the positive / negative electrode plates, so that the pressing roller can be pressed against the positive / negative electrode plates passing through the third conveying roller, playing a certain positioning role for the positive / negative electrode plates, thereby avoiding the deviation of the positive / negative electrode plates caused by the coating of the coating equipment to a certain extent and further improving the accuracy of the coating process of the coating equipment.

[0013] Further, a supporting device is arranged on the machine frame, the supporting device is located on the right side of the third conveying roller, and a supporting surface is formed at the top end of the supporting device, and the supporting surface is horizontally arranged and is flush with the top end of the third conveying roller.

[0014] In the present invention, the supporting device is used to support the part of the positive / negative electrode plates that needs to be coated, so that during the coating process of the positive / negative electrode plates, the acting force of the coating equipment on the positive / negative electrode plates can be prevented from causing the positive / negative electrode plates to deviate, and the coating accuracy of the coating equipment can be further improved.

[0015] Furthermore, the supporting device includes a first transmission roller and a second transmission roller rotatably arranged on the frame, and a conveying belt sleeved on the first transmission roller and the second transmission roller and drivingly connected to the first transmission roller and the second transmission roller, and the supporting surface is formed on the upper surface of the conveying belt.

[0016] In the present invention, the first transmission roller and the second transmission roller can be driven by a driving motor arranged on the frame, thereby driving the conveyor belt to move and conveying the positive / negative electrode sheets. When the driving motor drives the first transmission roller and the second transmission roller to rotate, it is necessary to make the conveying speed of the conveyor belt the same as the transfer speed of the positive / negative electrode sheets, so as to avoid the positive / negative electrode sheets being scratched by the conveyor belt.

[0017] Furthermore, the support device also includes a support plate fixedly mounted on the frame, the support plate is horizontally arranged and extends to the inner side of the conveyor belt, the upper surface of the support plate abuts against the inner surface of the conveyor belt and is slidably matched with the inner surface of the conveyor belt.

[0018] In the present invention, the support plate is used to support the conveyor belt. Compared with using a flexible conveyor belt to support the positive / negative electrode sheets, the presence of the support plate can convert the support of the conveyor belt for the positive / negative electrode sheets into a rigid support, thereby effectively ensuring the supporting effect of the conveyor belt for the positive / negative electrode sheets, and preventing the positive / negative electrode sheets from being offset due to the force of the coating equipment on the positive / negative electrode sheets.

[0019] Furthermore, a second detection device is also arranged on the frame, and the second detection device includes detection components arranged at the front and rear; the second detection device also includes an alarm, and the alarm is communicatively connected with the detection components of the second detection device.

[0020] In the present invention, the detection positions of the two detection components of the second detection device need to be set at a preset position, which is the position of the front and rear edges of the positive / negative electrode sheet when the positive / negative electrode sheet is not offset. Therefore, if the positive / negative electrode sheet is offset during the conveying process, it will be detected by the second detection device. After the two detection components of the second detection device detect the positive / negative electrode sheet, they will send a signal to the alarm. After receiving the signal, the alarm can sound an alarm, warning that the coating position has deviated from the preset position, and can promptly remind the operator to intervene.

[0021] Furthermore, the detection component is a through-beam photoelectric sensor, including a transmitter and a receiver arranged up and down.

[0022] In the present invention, the detection principle of the opposed photoelectric sensor is as follows: If the positive / negative electrode plates are displaced and enter between the emitter and the receiver, they will be detected by the opposed photoelectric sensor. Therefore, when setting the opposed photoelectric sensor, it is necessary to make the opposed photoelectric sensor located at the front or rear edge of the positive / negative electrode plates.

[0023] On the other hand, the present invention also provides a method for rectifying the position of the positive and negative electrode plates of a lithium battery conveying mechanism with a rectifying function, including the following steps: Install the positive / negative electrode plates: Connect to the equipment of the previous process, and pull the positive / negative electrode plates supplied by the previous process to the first conveying roller, the second conveying roller, and the third conveying roller, so that the positive / negative electrode plates pass through the lower end of the first conveying roller, then pass through the upper end of the rectifying roller, then pass through the lower end of the second conveying roller, then pass through the upper end of the third conveying roller, and then make the positive / negative electrode plates pass through the supporting device while adhering to the conveying surface of the supporting device; Detect the position of the positive / negative electrode plates: Set the two detection components of the first detection device on the front and rear edges of the positive / negative electrode plates respectively, so that the detection positions of the two detection components are on the front and rear edges of the positive / negative electrode plates. If the front detection component detects the positive / negative electrode plates, it indicates that the positive / negative electrode plates are displaced forward. If the rear detection component detects the positive / negative electrode plates, it indicates that the positive / negative electrode plates are displaced backward; Rectify the position of the positive / negative electrode plates: The rectifying roller acts in real time according to the detection result of the first detection device. If the front detection component detects the positive / negative electrode plates, the front end of the rectifying roller is gradually lifted until the front detection component no longer detects the positive / negative electrode plates. If the rear detection component detects the positive / negative electrode plates, the front end of the rectifying roller is gradually lowered until the rear detection component no longer detects the positive / negative electrode plates. Otherwise, the rectifying roller does not act.

[0024] Further, it also includes the following steps: Detect the coated positive / negative electrode plates: Set the two detection components of the second detection device on the front and rear edges of the positive / negative electrode plates respectively, so that the detection positions of the two detection components are on the front and rear edges of the positive / negative electrode plates. If the front detection component detects the positive / negative electrode plates, it indicates that the positive / negative electrode plates are displaced forward. If the rear detection component detects the positive / negative electrode plates, it indicates that the positive / negative electrode plates are displaced backward; If the detection component of the second detection device detects the positive / negative electrode plates, it indicates that the coated positive / negative electrode plates have a position displacement. At this time, the warning device receiving the signal issues an alarm.

[0025] The principle and effect of the present invention will be further described below in combination with the above technical solutions and the drawings: Through the arrangement of the first detection device, the present invention can monitor the deviation of the positive / negative electrode plates in real time. According to the monitoring results, the deviation correction roller is swung, so that the positive / negative electrode plates can be corrected in real time during the conveying process, that is, the present invention can make the positive / negative electrode plates always in a preset position when being conveyed to the coating equipment, effectively ensuring the coating accuracy of the coating equipment and improving the coating equipment for the positive / negative electrode plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 1 is a front view structural schematic diagram of a lithium battery positive and negative electrode plate conveying mechanism with a deviation correction function according to an embodiment of the present invention; Figure 2 FIG. 2 is a top view structural schematic diagram of a lithium battery positive and negative electrode plate conveying mechanism with a deviation correction function according to an embodiment of the present invention; Figure 3 FIG. 3 is a structural schematic diagram of a deviation correction device according to an embodiment of the present invention. DRAWINGS

[0027] 1 - First conveying roller, 2 - Second conveying roller, 3 - Third conveying roller, 4 - Deviation correction roller, 41 - Mounting shaft, 51 - Detection assembly, 6 - Pressing roller, 71 - First driving roller, 72 - Second driving roller, 73 - Conveying belt, 74 - Support plate, 8 - Positive / negative electrode plate, 91 - First base, 92 - First mounting seat, 93 - Second base, 94 - Mounting platform, 95 - Servo cylinder, 96 - Second mounting seat. EMBODIMENTS

[0028] For the convenience of those skilled in the art to understand, the present invention will be further described in detail below with reference to the drawings and embodiments: As Figures 1-3 , a lithium battery positive and negative electrode plate conveying mechanism with a deviation correction function includes a frame (not shown in the figure). The frame is sequentially provided with a first conveying roller 1, a second conveying roller 2, and a third conveying roller 3 from left to right. The first conveying roller 1, the second conveying roller 2, and the third conveying roller 3 are all arranged along the front-rear direction and are at the same horizontal height. A deviation correction station is formed between the first conveying roller 1 and the second conveying roller 2, and a detection station is formed between the second conveying roller 2 and the third conveying roller 3. The frame is further provided with a first detection device located at the detection station. The first detection device includes a detection assembly 51 arranged in the front-rear direction. The frame is further provided with a deviation correction device located at the deviation correction station. The deviation correction device includes a deviation correction roller 4 arranged along the front-rear direction. The rear end of the deviation correction roller 4 is pivotally connected to the frame through a first mounting frame, and the front end of the deviation correction roller 4 is liftably arranged on the frame through a second mounting frame. The lower end of the deviation correction roller 4 is located above the lower end of the first conveying roller 1.

[0029] The present invention is used for the conveyance of the positive or negative electrode sheets to be coated, so as to convey them to a coating device for coating. The path of the positive / negative electrode sheet 8 passing through the present invention is as follows: First, it passes through the lower end of the first conveying roller 1 and then through the first conveying roller 1, then passes through the upper end of the deviation rectifying roller 4 and then through the deviation rectifying roller 4, then passes through the lower end of the second conveying roller 2 and then through the second conveying roller 2, and then passes through the upper end of the third conveying roller 3 and then through the third conveying roller 3. It should be noted that when using the present invention, after the positive / negative electrode sheet 8 passing through the third conveying roller 3 is installed on the coating device, the positive / negative electrode sheet 8 between the third conveying roller 3 and the coating device needs to be in a tensioned state.

[0030] In the present invention, the detection positions of the two detection components 51 of the first detection device need to be set at preset positions, which are the positions where the front and rear edges of the positive / negative electrode sheet 8 are located when the positive / negative electrode sheet 8 does not deviate. Therefore, if the positive / negative electrode sheet 8 deviates during conveyance, it will be detected by the first detection device. After the two detection components 51 of the first detection device detect the positive / negative electrode sheet 8, they will send a signal to the deviation rectifying device. At this time, the deviation rectifying device can perform real-time deviation rectification processing on the conveyed positive / negative electrode sheet 8 according to the detection result of the first detection device. Specifically, if the front detection component 51 detects the positive / negative electrode sheet 8, the front end of the deviation rectifying roller 4 will gradually lift (the deviation rectifying roller 4 with the lifted front end will push the positive / negative electrode sheet 8 backward) until the front detection component 51 can no longer detect the positive / negative electrode sheet 8. At this time, the positive / negative electrode sheet 8 returns to the preset position; if the rear detection component 51 detects the positive / negative electrode sheet 8, the front end of the deviation rectifying roller 4 will gradually move downward (the deviation rectifying roller 4 with the downward-moved front end will cause the positive / negative electrode sheet 8 on it to slide forward under the action of tension) until the rear detection component 51 can no longer detect the positive / negative electrode sheet 8.

[0031] It can be seen that the present invention can perform real-time deviation rectification processing on the positive / negative electrode sheet 8 during the conveyance of the positive / negative electrode sheet 8, that is, the present invention can make the positive / negative electrode sheet 8 always be in a preset position when being conveyed to the coating device, which can effectively ensure the coating accuracy of the coating device and improve the coating quality of the positive / negative electrode sheet 8.

[0032] In one embodiment, mounting shafts 41 are fixedly provided at both ends of the deviation rectifying roller 4, and the mounting shafts 41 are coaxially arranged with the deviation rectifying roller 4; the first mounting bracket includes a first base 91 fixedly provided on the frame, a first mounting seat 92 is pivotally connected to the first base 91, and the connecting shaft at the rear end of the deviation rectifying roller 4 is rotatably arranged in the first mounting seat 92 through a bearing structure; the second mounting bracket includes a second base 93 fixedly provided on the frame, a mounting platform 94 is vertically arranged on the second base 93 through a servo cylinder 95, a second mounting seat 96 is pivotally connected to the mounting platform 94, a jack penetrating through the second mounting seat 96 is formed in the second mounting seat 96 corresponding to the mounting shaft 41 at the front end of the deviation rectifying roller 4, and the mounting shaft 41 at the front end of the deviation rectifying roller 4 is inserted into the jack and is slidably matched with the jack; the servo cylinder 95 is communicatively connected with the detection component 51 of the first detection device.

[0033] In this embodiment, the servo cylinder 95 on the second base 93 can drive the front end of the deviation rectifying roller 4 to move up and down by driving the mounting platform 94 to move up and down, so as to realize the deviation rectifying effect of the deviation rectifying roller 4 on the positive / negative electrode plate 8. During this process, the front end of the deviation rectifying roller 4 will drive the second mounting seat 96 to rotate relative to the mounting platform 94. At the same time, the deviation rectifying roller 4 moves back and forth in the jack of the second mounting seat 96 through its front mounting shaft 41, changing the upper end of the deviation rectifying roller 4 between the first mounting seat 92 and the second mounting seat 96, so that the front end of the deviation rectifying roller 4 can move up and down smoothly.

[0034] In one embodiment, a pressing roller 6 is also rotatably arranged on the frame, and the pressing roller 6 is arranged above the third conveying roller 3 and is matched with the third conveying roller 3.

[0035] In this embodiment, the position of the pressing roller 6 needs to be adjusted according to the thickness of the positive / negative electrode plate 8, so that the pressing roller 6 can be pressed on the positive / negative electrode plate 8 passing through the third conveying roller 3, playing a certain positioning role on the positive / negative electrode plate 8, thereby avoiding the deviation of the positive / negative electrode plate 8 caused by the coating of the coating equipment to a certain extent, and further improving the accuracy of the coating process of the coating equipment.

[0036] In one embodiment, a supporting device is also arranged on the frame, the supporting device is located on the right side of the third conveying roller 3, and a supporting surface is formed at the top end of the supporting device, and the supporting surface is horizontally arranged and flush with the top end of the third conveying roller 3.

[0037] In this embodiment, the supporting device is used to support the portion of the positive / negative electrode sheet 8 that needs to be coated, thereby preventing the coating equipment from exerting force on the positive / negative electrode sheet 8 during the coating process, causing the positive / negative electrode sheet 8 to be offset, and further improving the coating accuracy of the coating equipment.

[0038] In one embodiment, the supporting device includes a first transmission roller 71 and a second transmission roller 72 rotatably disposed on the frame, and a conveying belt 73 sleeved on the first transmission roller 71 and the second transmission roller 72 and drivingly connected to the first transmission roller 71 and the second transmission roller 72, and the supporting surface is formed on the upper surface of the conveying belt 73.

[0039] In this embodiment, the first transmission roller 71 and the second transmission roller 72 can be driven by a driving motor arranged on the frame, thereby driving the conveying belt 73 to move, thereby conveying the positive / negative electrode sheets 8. When the driving motor drives the first transmission roller 71 and the second transmission roller 72 to rotate, it is necessary to make the conveying speed of the conveying belt 73 the same as the moving speed of the positive / negative electrode sheets 8, so as to avoid the positive / negative electrode sheets 8 being scratched by the conveying belt.

[0040] In one embodiment, the supporting device also includes a supporting plate 74 fixedly mounted on the frame, wherein the supporting plate 74 is horizontally arranged and extends to the inner side of the conveyor belt, and the upper surface of the supporting plate 74 abuts against the inner surface of the conveyor belt and is slidably matched with the inner surface of the conveyor belt.

[0041] In this embodiment, the support plate 74 is used to support the conveyor belt. Compared with using a flexible conveyor belt to support the positive / negative electrode sheets 8, the existence of the support plate 74 can convert the support of the conveyor belt for the positive / negative electrode sheets 8 into a rigid support, thereby effectively ensuring the support effect of the conveyor belt for the positive / negative electrode sheets 8, and preventing the positive / negative electrode sheets 8 from being offset due to the force of the coating equipment on the positive / negative electrode sheets 8.

[0042] In one embodiment, a second detection device is further provided on the frame, and the second detection device includes detection components 51 arranged at the front and rear; the second detection device also includes an alarm, and the alarm is communicatively connected with the detection component 51 of the second detection device.

[0043] In this embodiment, the detection positions of the two detection components 51 of the second detection device need to be set at preset positions, which are the positions where the front and rear edges of the positive / negative electrode plate 8 are located when the positive / negative electrode plate 8 does not shift. Therefore, if the positive / negative electrode plate 8 shifts during transportation, it will be detected by the second detection device. After the two detection components 51 of the second detection device detect the positive / negative electrode plate 8, they will send signals to the alarm. After receiving the signals, the alarm can issue an alarm to indicate that the coating position has deviated from the preset position, and the operator can be reminded in time to intervene.

[0044] In one embodiment, the detection component 51 is a transmissive photoelectric sensor, including a transmitter and a receiver arranged vertically.

[0045] In this embodiment, the detection principle of the transmissive photoelectric sensor is as follows: If the positive / negative electrode plate 8 shifts and enters between the transmitter and the receiver, it will be detected by the transmissive photoelectric sensor. Therefore, when setting the transmissive photoelectric sensor, it is necessary to make the transmissive photoelectric sensor located at the front or rear edge of the positive / negative electrode plate 8.

[0046] On the other hand, the present invention also provides a deviation correction method for a lithium battery positive and negative electrode plate conveying mechanism with a deviation correction function, including the following steps: Install the positive / negative electrode plate 8: Connect to the equipment of the previous process, and draw the positive / negative electrode plate 8 supplied by the previous process to the first conveying roller 1, the second conveying roller 2, and the third conveying roller 3, so that the positive / negative electrode plate 8 passes through the lower end of the first conveying roller 1, then passes through the upper end of the deviation correction roller 4, then passes through the lower end of the second conveying roller 2, then passes through the upper end of the third conveying roller 3, and then makes the positive / negative electrode plate 8 pass through the supporting device while fitting on the conveying surface of the supporting device; Detect the position of the positive / negative electrode plate 8: The two detection components 51 of the first detection device are respectively arranged at the front and rear edges of the positive / negative electrode plate 8, so that the detection positions of the two detection components 51 are located at the front and rear edges of the positive / negative electrode plate 8. If the front detection component 51 detects the positive / negative electrode plate 8, it indicates that the positive / negative electrode plate 8 has shifted forward. If the rear detection component 51 detects the positive / negative electrode plate 8, it indicates that the positive / negative electrode plate 8 has shifted backward; Perform deviation correction on the positive / negative electrode plate 8: The deviation correction roller 4 acts in real time according to the detection result of the first detection device. If the front detection component 51 detects the positive / negative electrode plate 8, the front end of the deviation correction roller 4 is gradually lifted until the front detection component 51 can no longer detect the positive / negative electrode plate 8; if the rear detection component 51 detects the positive / negative electrode plate 8, the front end of the deviation correction roller 4 is gradually lowered until the rear detection component 51 can no longer detect the positive / negative electrode plate 8; otherwise, the deviation correction roller 4 does not act.

[0047] One of the embodiments further includes the following steps: Detect the coated positive / negative electrode plate 8: respectively arrange the two detection components 51 of the second detection device on the front and rear side edges of the positive / negative electrode plate 8, so that the detection positions of the two detection components 51 are located on the front and rear side edges of the positive / negative electrode plate 8. If the front detection component 51 detects the positive / negative electrode plate 8, it indicates that the positive / negative electrode plate 8 has shifted forward. If the rear detection component 51 detects the positive / negative electrode plate 8, it indicates that the positive / negative electrode plate 8 has shifted backward; If the detection component 51 of the second detection device detects the positive / negative electrode plate 8, it indicates that the coated positive / negative electrode plate 8 has shifted in position. At this time, the warning device receiving the signal issues an alarm.

[0048] The above embodiments only express several implementation manners of the present invention, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A conveying mechanism for the positive and negative electrodes of a lithium battery with a deviation correction function, characterized in that, it includes a frame, on which a first conveying roller, a second conveying roller and a third conveying roller are sequentially arranged from left to right. The first conveying roller, the second conveying roller and the third conveying roller are all arranged along the front-rear direction and are at the same horizontal height. A deviation correction station is formed between the first conveying roller and the second conveying roller, and a detection station is formed between the second conveying roller and the third conveying roller. A first detection device is also arranged on the frame, and the first detection device is located at the detection station. The first detection device includes a detection component arranged in the front-rear direction. A deviation correction device is also arranged on the frame, and the deviation correction device is located at the deviation correction station. The deviation correction device includes a deviation correction roller arranged along the front-rear direction. The rear end of the deviation correction roller is pivotally connected to the frame through a first mounting bracket, and the front end of the deviation correction roller is arranged on the frame in a liftable manner through a second mounting bracket. The lower end of the deviation correction roller is located above the lower end of the first conveying roller.

2. The conveying mechanism for the positive and negative electrodes of a lithium battery with a deviation correction function according to claim 1, characterized in that, both ends of the deviation correction roller are fixedly provided with mounting shafts, and the mounting shafts are arranged coaxially with the deviation correction roller. The first mounting bracket includes a first base fixedly arranged on the frame, and a first mounting seat is pivotally connected to the first base. The connecting shaft at the rear end of the deviation correction roller is rotatably arranged in the first mounting seat through a bearing structure. The second mounting bracket includes a second base fixedly arranged on the frame, and a mounting platform is arranged on the second base in a liftable manner through a servo cylinder. A second mounting seat is pivotally connected to the mounting platform. A jack penetrating the second mounting seat is formed on the second mounting seat corresponding to the mounting shaft at the front end of the deviation correction roller. The mounting shaft at the front end of the deviation correction roller is inserted into the jack and is slidably matched with the jack. The servo cylinder is in communication connection with the detection component of the first detection device.

3. The conveying mechanism for the positive and negative electrodes of a lithium battery with a deviation correction function according to claim 2, characterized in that, a pressure roller is also rotatably arranged on the frame, and the pressure roller is arranged above the third conveying roller and is matched with the third conveying roller.

4. The conveying mechanism for the positive and negative electrodes of a lithium battery with a deviation correction function according to claim 3, characterized in that, a support device is also arranged on the frame, and the support device is located on the right side of the third conveying roller. The top end of the support device forms a support surface, and the support surface is horizontally arranged and is flush with the top end of the third conveying roller.

5. The conveying mechanism for the positive and negative electrodes of a lithium battery with a deviation correction function according to claim 4, characterized in that, the support device includes a first driving roller and a second driving roller rotatably arranged on the frame, and a conveying belt sleeved on the first driving roller and the second driving roller and drivingly connected to the first driving roller and the second driving roller. The support surface is formed on the upper side surface of the conveying belt.

6. A lithium battery anode and cathode sheet conveying mechanism with a deviation rectification function according to claim 5, characterized in that, the support device further includes a support plate fixedly arranged on the frame, the support plate is horizontally arranged and extends to the inner side of the conveyor belt, and the upper surface of the support plate abuts against the inner surface of the conveyor belt and is slidably matched with the inner surface of the conveyor belt.

7. A lithium battery anode and cathode sheet conveying mechanism with a deviation rectification function according to claim 5, characterized in that, a second detection device is further arranged on the frame, and the second detection device includes a detection component arranged front and back; the second detection device further includes an alarm, and the alarm is communicatively connected to the detection component of the second detection device.

8. A lithium battery anode and cathode conveying mechanism with a deviation rectification function according to claim 7, characterized in that, the detection component is a transmissive photoelectric sensor, including a transmitter and a receiver arranged up and down.

9. A deviation rectification method for a lithium battery anode and cathode sheet conveying mechanism with a deviation rectification function according to any one of claims 1-7, characterized in that, it includes the following steps: Install the positive / negative electrode sheet: Connect to the equipment of the previous process, and pull the positive / negative electrode sheet supplied by the previous process to the first conveying roller, the second conveying roller and the third conveying roller, so that the positive / negative electrode sheet passes through the lower end of the first conveying roller, then passes through the upper end of the deviation rectification roller, then passes through the lower end of the second conveying roller, then passes through the upper end of the third conveying roller, and then makes the positive / negative electrode sheet pass through the support device by fitting on the conveying surface of the support device; Detect the position of the positive / negative electrode sheet: Arrange the two detection components of the first detection device on the front and rear side edges of the positive / negative electrode sheet respectively, so that the detection positions of the two detection components are located on the front and rear side edges of the positive / negative electrode sheet. If the front detection component detects the positive / negative electrode sheet, it means that the positive / negative electrode sheet has shifted forward. If the rear detection component detects the positive / negative electrode sheet, it means that the positive / negative electrode sheet has shifted backward; Rectify the positive / negative electrode sheet: The deviation rectification roller acts in real time according to the detection structure of the first detection device. If the front detection component detects the positive / negative electrode sheet, the front end of the deviation rectification roller is gradually lifted until the front detection component no longer detects the positive / negative electrode sheet; if the rear detection component detects the positive / negative electrode sheet, the front end of the deviation rectification roller is gradually lowered until the rear detection component no longer detects the positive / negative electrode sheet; otherwise, the deviation rectification roller does not act.

10. A deviation rectification method for a lithium battery anode and cathode sheet conveying mechanism with a deviation rectification function according to claim 9, characterized in that, it further includes the following steps: Detect the positive / negative electrode plates after coating: Place the two detection components of the second detection device on the front and rear side edges of the positive / negative electrode plates respectively, so that the detection positions of the two detection components are on the front and rear side edges of the positive / negative electrode plates. If the detection component on the front side detects the positive / negative electrode plate, it indicates that the positive / negative electrode plate has shifted forward. If the detection component on the rear side detects the positive / negative electrode plate, it indicates that the positive / negative electrode plate has shifted backward; If the detection component of the second detection device detects the positive / negative electrode plate, it indicates that the coated positive / negative electrode plate has shifted in position. At this time, the alarm device that receives the signal issues an alarm.

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