Adjustment mechanism for thermally compounded electrode sheet, and electrode sheet thermal-compounding device

Abstract

An adjustment mechanism for a thermally compounded electrode sheet. The adjustment mechanism comprises a feeding assembly (110), a deviation-rectifying assembly (120) and a visual recognition assembly (130), wherein the feeding assembly (110) comprises a feeding table (122), a discharge end of the feeding table (122) being arranged towards a fed material tape (200a), and the fed material tape (200a) comprising a separator tape (210) and a first electrode sheet (230) arranged in the separator tape (210); the deviation-rectifying assembly (120) is in transmission connection with the feeding table (122), and the deviation-rectifying assembly (120) comprises a first deviation-rectifying member (121) used for adjusting the adjustment position of a second electrode sheet (220) in an X direction, and a second deviation-rectifying member (123) and a third deviation-rectifying member (124) separately used for adjusting the adjustment position of the second electrode sheet (220) in a Y direction, the second deviation-rectifying member (123) and the third deviation-rectifying member (124) being sequentially arranged in the X direction, the X direction being parallel to the conveying direction of the second electrode sheet (220), the Y direction being perpendicular to the X direction, and the Y direction and the X direction being located in the same plane; and the visual recognition assembly (130) is arranged towards the feeding table (122) and performs visual recognition on the second electrode sheet (220) on the feeding table (122). The adjustment mechanism for a thermally compounded electrode sheet avoids a feeding error, and is conducive to ensuring that the degree of alignment between a first electrode sheet and a second electrode sheet of a composite material tape formed after thermal compounding is accurate. An electrode sheet thermal-compounding device is further comprised.

Description

Thermal composite pole piece adjustment mechanism and pole piece thermal composite device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 26, 2024, with application number 202421804374.4. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electrode manufacturing equipment, for example, to a thermal composite electrode adjustment mechanism and an electrode thermal composite device. Background Art

[0003] The existing hot lamination process typically involves cutting the negative electrode sheet and feeding it between two layers of separators. Heat and pressure are applied by hot lamination rollers, allowing the negative electrode sheet and separator to adhere and laminate. Subsequently, the positive electrode sheet is cut to equal widths and fed alternately to the front and back of the lamination tape via a feed assembly, where it is then laminated by hot lamination rollers. Because both the positive and negative electrode sheet feeding and the separator tape are moving at high speeds, this places extremely high demands on the accuracy of the electrode sheet feeding. Technical issues

[0004] In the related technology, traditional equipment does not have a monitoring mechanism before the electrode is fed into the material, and is unable to detect and calibrate the electrode offset in a timely manner. In most cases, the electrode offset in a single direction in the direction of movement is considered, and thus it is impossible to monitor and correct the offset in various directions before the electrode is fed into the material, such as the left and right sides of the electrode movement direction. Therefore, it is difficult to accurately control the alignment of the positive and negative electrode sheets after feeding before thermal recombination, which results in poor alignment of the positive and negative electrode sheets in the battery cell, resulting in lithium powder loss and poor performance consistency. Solution

[0005] The present application provides a thermal composite electrode adjustment mechanism, including a feeding assembly, a correction assembly and a visual recognition assembly, the feeding assembly including a feeding table, the discharge end of the feeding table is arranged toward the feeding material belt, the feeding material belt includes a diaphragm belt and a first electrode arranged in the diaphragm belt; the correction assembly is transmission-connected to the feeding table to adjust the position of the second electrode located on the feeding table, the correction assembly includes a first correction component, a second correction component and a third correction component, the first correction component is used to adjust the position of the second electrode along the X direction, the second correction component and the third correction component are respectively used to adjust the position of the second electrode along the Y direction, the second correction component and the third correction component are sequentially arranged along the X direction; the X direction is arranged parallel to the conveying direction of the second electrode, the Y direction is arranged perpendicular to the conveying direction of the second electrode, and the X direction and the Y direction are located in the same plane; the visual recognition component is arranged toward the feeding table and performs visual recognition on the second electrode placed on the feeding table, and the visual recognition component is connected to the correction assembly.

[0006] The present application also provides a pole piece thermal composite device, which includes a frame and a thermal composite pole piece adjustment mechanism, wherein the thermal composite pole piece adjustment mechanism is installed on the frame. Beneficial effects

[0007] The present application provides a thermal composite electrode adjustment mechanism, which conveys the second electrode to the corresponding position of the first electrode on the feed belt through the feeding table of the feeding component, so that the first electrode and the second electrode are bonded across the diaphragm belt and then thermally composited by the thermal composite component to obtain a composite material belt. Wherein, during the feeding process of the second electrode by the feeding component, the position of the second electrode on the feeding table is identified by the visual recognition component, and the position of the second electrode is compared with the standard template parameters in the visual recognition component. If there is a deviation, the visual recognition component transmits the correction signal to the correction component, and the correction component corrects the feeding table to achieve position correction adjustment of the first electrode placed on the feeding table, so that the second electrode is accurately conveyed to the corresponding position on the feed belt by the feeding component, avoiding feeding errors, and being conducive to ensuring the accurate alignment of the first electrode and the second electrode of the composite material belt formed after thermal composite, thereby helping to avoid the occurrence of lithium powder precipitation in subsequent products and improving the consistency of product performance.

[0008] The correction assembly provided by the present application includes a first correction member, a second correction member and a third correction member, wherein the first correction member is used to adjust the position of the second pole piece along the X direction, the second correction member and the third correction member are arranged in sequence along the X direction, and are respectively used to adjust the position of the second pole piece along the Y direction. The X direction is parallel to the conveying direction of the second pole piece, the Y direction is perpendicular to the conveying direction of the second pole piece 220, and the X direction and the Y direction are located in the same plane, so as to realize three-axis adjustment of the second pole piece in the plane, thereby being able to meet the position adjustment of the second pole piece placed on the feeding table to achieve translation or rotation at any angle in the plane, so that the position of the second pole piece is adjusted to align with the standard position to achieve the effect of precise correction adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic structural diagram of a pole piece thermal composite device provided by some implementations of the present application;

[0010] FIG2 is a schematic planar structural diagram of a thermal composite electrode adjustment mechanism provided in some implementations of the present application;

[0011] FIG3 is a schematic structural diagram of a driving state of a correction component provided by some implementations of the present application;

[0012] FIG4 is a schematic structural diagram of a second driving state of a correction component provided by some implementations of the present application;

[0013] FIG5 is a schematic structural diagram of the three driving states of the correction component provided by some implementations of the present application;

[0014] FIG6 is a schematic structural diagram of the four-drive state of the correction component provided by some implementations of the present application;

[0015] FIG7 is a schematic structural diagram of the five driving states of the correction component provided by some implementations of the present application;

[0016] FIG8 is a schematic diagram of the structure of a visual recognition component provided by some implementations of the present application;

[0017] FIG9 is a schematic structural diagram of a shooting range of a visual recognition component on a second pole piece provided by some implementations of the present application;

[0018] FIG10 is a schematic diagram of the structure of the initial feeding belt provided by some implementations of the present application;

[0019] FIG11 is a schematic diagram showing the positional relationship between the second pole piece and the feed material strip provided in some implementations of the present application.

[0020] In the picture:

[0021] 1. Frame; 100. Thermal composite assembly; 1100. Machine body; 110. Feeding assembly; 1101. First feeder; 1102. Second feeder; 120. Correction assembly; 121. First correction member; 1211. First correction motor; 122. Feeding platform; 1221. Platform center; 1222. Any point on the platform; 123. Second correction member; 1231. Second correction motor; 124. Third correction member; 1241. Third correction motor; 125. Feeding clamp; 1251. First clamp; 1252. Second clamp; 1220. First drive member; 1250. Second drive member; 1 30. Visual recognition component; 131. Visual camera; 1311. First camera; 1312. Second camera; 132. Light source; 133. Shooting range; 140. First feed roller; 150. Second feed roller; 160. First thermal composite roller; 170. Second thermal composite roller; 200a. Feed material belt; 200b. Composite material belt; 210. Diaphragm belt; 220. Second pole piece; 230. First pole piece; 300. Feed guide assembly; 310. First deviation correction direction; 320. Second deviation correction direction; 330. Third deviation correction direction; 340. X direction; 350. Y direction; 400. Standard position. Modes for Carrying Out the Invention

[0022] As shown in Figures 1 to 11, a thermal composite electrode adjustment mechanism of this embodiment. The thermal composite electrode adjustment mechanism includes a feeding component 110, a correction component 120 and a visual recognition component 130. The feeding component 110 includes a feeding table 122, and the discharge end of the feeding table 122 is arranged toward the feeding material belt 200a. As shown in Figure 11, the feeding material belt 200a includes a diaphragm belt 210 and a first electrode 230 arranged in the diaphragm belt 210; the correction component 120 is connected to the feeding table 122 in a transmission manner to adjust the position of the second electrode 220 located on the feeding table 122, and the correction component 120 includes a first correction member 121, a second correction member 123 and a third correction member 124. The first correction member 121 is used to adjust the position of the second electrode 220 along the X direction 340, and the second correction member 123 and the third correction member 124 are respectively used to adjust the second The pole piece 220 is adjusted in position along the Y direction 350, and the second correcting member 123 and the third correcting member 124 are arranged in sequence along the X direction 340; the X direction 340 is arranged parallel to the conveying direction of the second pole piece 220, and the Y direction 350 is arranged perpendicular to the conveying direction of the second pole piece 220, and the X direction 340 and the Y direction 350 are located in the same plane; the visual recognition component 130 is arranged toward the feeding table 122 and performs visual recognition on the second pole piece 220 placed on the feeding table 122, and the visual recognition component 130 is connected to the correcting component 120.

[0023] In this embodiment, the second electrode piece 220 is transported to the corresponding position of the first electrode piece 230 on the input material strip 200a by the feeding table 122 of the feeding assembly 110, so that the first electrode piece 230 and the second electrode piece 220 are bonded together through the diaphragm strip 210 and then thermally composited by the thermal composite assembly to obtain the composite material strip 200b. Among them, during the feeding process of the second electrode piece 220 by the feeding component 110, the position of the second electrode piece 220 located on the feeding table 122 is identified by the visual recognition component 130, and the position of the second electrode piece 220 is compared with the standard template parameters in the visual recognition component 130. If there is a deviation, the visual recognition component 130 transmits the correction signal to the correction component 120, and the feeding table 122 is corrected by the correction component 120 to achieve position correction adjustment of the first electrode piece 230 placed on the feeding table 122, so that the second electrode piece 220 is accurately transported to the corresponding position on the feed belt 200a through the feeding component 110, avoiding feeding errors, which is beneficial to ensuring the accurate alignment of the first electrode piece 230 and the second electrode piece 220 of the composite material belt 200b formed after thermal composite, thereby helping to avoid the occurrence of lithium powder loss in subsequent products and improving the consistency of product performance.

[0024] The deflection correction assembly 120 includes a first deflection correction member 121, a second deflection correction member 123, and a third deflection correction member 124. The first deflection correction member 121 is used to adjust the position of the second pole piece 220 along the X direction 340. The second deflection correction member 123 and the third deflection correction member 124 are arranged in sequence along the X direction 340 and are respectively used to adjust the position of the second pole piece 220 along the Y direction 350. The X direction 340 is parallel to the conveying direction of the second pole piece 220, the Y direction 350 is perpendicular to the conveying direction of the second pole piece 220, and the X direction 340 and the Y direction 350 are located in the same plane, thereby achieving three-axis adjustment of the second pole piece 220 in the plane, thereby meeting the requirements of the second pole piece 220 placed on the feeding table 122 to achieve position adjustment of translation or rotation at any angle in the plane, so that the position of the second pole piece 220 is adjusted to align with the standard position 400, so as to achieve the effect of precise deflection correction adjustment.

[0025] In one possible implementation, the visual recognition component 130 includes a visual camera 131, the second pole piece 220 is rectangular, and any two corners of the second pole piece 220 are located within a shooting range 133 of the visual camera 131. For the rectangular second pole piece 220, the positions of any two corners of the second pole piece 220 are captured by the visual camera 131, and the positions of any two corners of the second pole piece 220 are ensured to be aligned with the corresponding standard positions 400. Then, the other two corners of the second pole piece 220 are naturally aligned with the corresponding standard positions 400, thereby ensuring that the position of the second pole piece 220 is aligned with the corresponding standard position 400.

[0026] In one possible implementation, the two corners on the same side of the second pole piece 220 are within the imaging range 133 of the visual camera 131. In actual operation, using the visual camera 131 to image the two corners on the same side of the second pole piece 220 helps reduce the imaging range 133 of the visual camera 131, avoids using a larger visual camera 131 or increasing the distance between the visual camera 131 and the second pole piece 220 to obtain a larger imaging range 133, and thus helps reduce the investment cost of the equipment.

[0027] In one possible implementation, the visual camera 131 includes two first cameras 1311, each used to capture the position of the two corners of the second pole piece 220, making the installation and arrangement of the visual camera 131 more flexible. The two corners of the second pole piece 220 on the front side along the conveying direction are respectively located in the shooting range 133 of the two first cameras 1311. When the feeding component 110 feeds the second pole piece 220, the two corners of the second pole piece 220 on the front side along the conveying direction first enter the feeding table 122 and enter the shooting range 133 of the first camera 1311, so that the first camera 1311 can capture the second pole piece 220 in a timely manner and transmit the signal to the correction component 120, so that the correction component 120 can quickly perform timely correction adjustment on the position of the second pole piece 220.

[0028] The visual camera 131 also includes two second cameras 1312. The two corners of the second pole piece 220 on the rear side along the conveying direction are respectively located in the shooting range 133 of the two second cameras 1312, which are used for re-shooting and detection after the second pole piece 220 is corrected and adjusted. Specifically, the first camera 1311 first shoots and detects the two corners of the front side of the second pole piece 220 along the conveying direction, and the correction component 120 corrects and adjusts the position of the second pole piece 220 to align with the standard position, and then the second camera 1312 shoots and detects the two corners of the rear side of the second pole piece 220 along the conveying direction again, confirming that the second pole piece 220 is accurately aligned with the standard position 400 under the adjustment of the correction component 120, and finally conveying the second pole piece 220 to the feeding belt 200a, ensuring the accurate feeding of the second pole piece 220, ensuring that the second pole piece 220 is aligned with the position of the first pole piece 230 on the feeding belt 200a, thereby ensuring the quality of the composite material belt 200b obtained after thermal compounding.

[0029] In one possible implementation, the visual recognition component 130 further includes a light source 132. The visual camera 131 and the light source 132 are disposed within the housing of the feed assembly 110. The visual camera 131 and the light source 132 are spaced apart to form a gap for the second pole piece 220 to pass through. In actual equipment, the space within the housing of the feed assembly 110 for conveying the second pole piece 220 is relatively small, and thus the interior of the housing is relatively dark. The light source 132 is disposed within the housing to ensure clarity of the images captured by the visual camera 131 and improve the accuracy of visual recognition detection.

[0030] In one possible implementation, the feeding assembly 110 further includes a body 1100 and a first driving member 1220. The feeding platform 122 is movably mounted on the body 1100. The first driving member 1220 drives the feeding platform 122 to move so as to transport the second pole piece 220 toward the infeed belt 200a. The first driving member 1220 drives the feeding platform 122 to move on the body 1100 to transport the second pole piece 220 on the feeding platform 122 to the infeed belt 200a, thereby completing the feeding operation of the second pole piece 220.

[0031] In one possible implementation, the feeding assembly 110 further includes a second driving member 1250 and a feeding clamp 125. The feeding clamp 125 is disposed between the feeding table 122 and the feed tape 200a. The second driving member 1250 drives the feeding clamp 125 to clamp or release the second pole piece 220, so as to transport the second pole piece 220 placed on the feeding table 122 to the feed tape 200a. The feeding clamp 125 includes a first clamping plate 1251 and a second clamping plate 1252. Through the clamping and support of the first clamping plate 1251 and the second clamping plate 1252, the second pole piece 220 falls smoothly and flatly onto the feed tape 200a, ensuring the flatness of the second pole piece 220 and the alignment of the corresponding position with the feed tape 200a, thereby ensuring the quality of the composite tape 200b obtained after thermal bonding.

[0032] In the present application, the first driving member 1220 and the second driving member 1250 can adopt driving devices and structures such as motors, cylinders or hydraulic cylinders, as long as they can realize the driving action of the present application, and are not specifically limited in the present application.

[0033] In actual operation, the first correcting member 121 includes a first correcting motor 1211 for driving the feeding table 122 to move along the first correcting direction 310, the second correcting member 123 includes a second correcting motor 1231 for driving the feeding table 122 to move along the second correcting direction 320, and the third correcting member 124 includes a third correcting motor 1241 for driving the feeding table 122 to move along the third correcting direction 330.

[0034] The connection positions of the second correcting motor 1231 and the third correcting motor 1241 with the feeding table 122 are symmetrically arranged relative to the central axis of the feeding table 122 which is perpendicular to the first correcting direction 310. During the correcting operation, the specific correcting operation of the correcting component 120 is shown in Figures 3 to 7, wherein as shown in Figure 3, driven by the first correcting motor 1211, the feeding table 122 moves along the X direction 340 parallel to the first correcting direction 310 to correct the feeding table 122 to the standard position 400; as shown in Figure 4, the second correcting motor 1231 and the third correcting motor 1241 are driven and the driving direction and driving amount are the same, and the feeding table 122 moves along the Y direction 350 parallel to the second correcting direction 320 and the third correcting direction 330 to correct the feeding table 122 to the standard position 400; as shown in Figure 5, the second correcting motor 1231 and the third correcting motor 1241 are driven but The driving amounts are different or the driving directions are opposite, and the feeding table 122 rotates around its platform center 1221; as shown in Figure 6, the first correcting motor 1211 is driven, and the second correcting motor 1231 and the third correcting motor 1241 are driven synchronously and have the same driving direction and driving amount, and the feeding table 122 moves along its diagonal direction to correct the feeding table 122 to the standard position 400; as shown in Figure 7, the first correcting motor 1211, the second correcting motor 1231 and the third correcting motor 1241 are driven at the same time, and the driving amounts of the second correcting motor 1231 and the third correcting motor 1241 are different, and the feeding table 122 rotates along any point 1222 of the platform to correct the feeding table 122 to the standard position 400.

[0035] In one possible implementation, a feed guide assembly 300 is further included. The feed guide assembly 300 is disposed at the discharge end of the feed assembly 110. The feed guide assembly 300 includes a first feed roller 140 and a second feed roller 150. The first feed roller 140 and the second feed roller 150 are respectively disposed on opposite sides of the feed belt 200a in the thickness direction. The first feed roller 140 and the second feed roller 150 rotate in opposite directions to feed the second pole piece 220 located between the first feed roller 140 and the second feed roller 150 onto the feed belt 200a and to contact the diaphragm belt 210 on the surface of the feed belt 200a.

[0036] The feeding assembly 110 includes a first feeder 1101 and a second feeder 1102. The first feeder 1101 and the second feeder 1102 are respectively arranged on both sides of the feeding belt 200a. The first feeder 1101 conveys the second electrode piece 220 toward the first feeding roller 140, and the second feeder 1102 conveys the second electrode piece 220 toward the second feeding roller 150, so that the second electrode piece 220 is respectively input from both sides of the thickness direction of the feeding belt 200a and adhered to the surface of the diaphragm belt 210 of the feeding belt 200a.

[0037] On the other hand, as shown in FIG. 1 to FIG. 11 , a pole piece thermal composite device is also provided, comprising a frame 1 and a thermal composite pole piece adjustment mechanism, wherein the thermal composite pole piece adjustment mechanism is mounted on the frame 1 .

[0038] In one possible implementation, a thermal composite assembly 100 is further provided on the frame 1, and the thermal composite assembly 100 includes a first thermal composite roller 160 and a second thermal composite roller 170 with opposite rotation directions. The first thermal composite roller 160 and the second thermal composite roller 170 are respectively arranged on both sides of the thickness direction of the feed material belt 200a to achieve thermal composite of the second pole piece 220 on both sides of the thickness direction of the feed material belt 200a with the feed material belt 200a, and finally form a composite material belt 200b for output, thereby completing the thermal composite processing operation of the pole piece.

Claims

1. A thermal composite pole piece adjustment mechanism, comprising: A feeding assembly (110), the feeding assembly (110) comprising a feeding table (122), the feeding table (122) having an outlet end disposed toward an inlet material belt (200a), the inlet material belt (200a) comprising a diaphragm belt (210) and a first pole piece (230) disposed in the diaphragm belt (210); A deflection correcting component (120), the deflection correcting component (120) being transmission-connected to the feeding platform (122) to adjust the position of a second pole piece (220) located on the feeding platform (122), the deflection correcting component (120) comprising a first deflection correcting member (121), a second deflection correcting member (123) and a third deflection correcting member (124), the first deflection correcting member (121) being used to adjust the position of the second pole piece (220) along an X direction (340), the second deflection correcting member (123) and the third deflection correcting member (124) being used to adjust the position of the second pole piece (220) along an X direction (340), The deflecting components (124) are respectively used to adjust the position of the second pole piece (220) along the Y direction (350), and the second deflection correcting component (123) and the third deflection correcting component (124) are sequentially arranged along the X direction (340); the X direction (340) is arranged parallel to the conveying direction of the second pole piece (220), the Y direction (350) is arranged perpendicular to the conveying direction of the second pole piece (220), and the X direction (340) and the Y direction (350) are located in the same plane; A visual recognition component (130), the visual recognition component (130) being arranged toward the feeding platform (122) and performing visual recognition on the second pole piece (220) placed on the feeding platform (122), the visual recognition component (130) being connected to the deviation correction component (120).

2. The thermal composite pole piece adjustment mechanism according to claim 1, wherein: The visual recognition component (130) comprises a visual camera (131); the second pole piece (220) is rectangular; and any two corners of the second pole piece (220) are located within a shooting range (133) of the visual camera (131).

3. The thermal composite pole piece adjustment mechanism according to claim 2, wherein: Two corners on the same side of the second pole piece (220) are located in the shooting range (133) of the visual camera (131).

4. The thermal composite pole piece adjustment mechanism according to claim 3, wherein: The visual camera (131) comprises two first cameras (1311), and two corners of the second pole piece (220) on the front side along the conveying direction are respectively located in the shooting range (133) of the two first cameras (1311).

5. The thermal composite pole piece adjustment mechanism according to claim 4, wherein: The visual camera (131) further comprises two second cameras (1312), and two corners of the second pole piece (220) at the rear side along the conveying direction are respectively located in the shooting range (133) of the two second cameras (1312).

6. The thermal composite pole piece adjustment mechanism according to claim 2, wherein: The visual recognition component (130) further comprises a shooting light source (132); the visual camera (131) and the shooting light source (132) are disposed in a housing of the feeding component (110); the visual camera (131) and the shooting light source (132) are spaced apart to form a gap for the second pole piece (220) to pass through.

7. The thermal composite pole piece adjustment mechanism according to any one of claims 1 to 6, wherein: The feeding assembly (110) further comprises a machine body (1100) and a first driving member (1220); the feeding platform (122) is movably disposed on the machine body (1100); and the first driving member (1220) drives the feeding platform (122) to move so as to transport the second pole piece (220) toward the input material belt (200a).

8. The thermal composite pole piece adjustment mechanism according to claim 7, wherein: The feeding assembly (110) further comprises a second driving member (1250) and a feeding clamp (125), wherein the feeding clamp (125) is arranged between the feeding platform (122) and the feeding material belt (200a), and the second driving member (1250) drives the feeding clamp (125) to clamp or release the second pole piece (220) so as to transport the second pole piece (220) placed on the feeding platform (122) to the feeding material belt (200a).

9. The thermal composite pole piece adjustment mechanism according to any one of claims 1 to 6, wherein: It also includes a feed guide assembly (300), the feed guide assembly (300) being arranged at the discharge end of the feeding assembly (110), the feed guide assembly (300) comprising a first feed roller (140) and a second feed roller (150), the first feed roller (140) and the second feed roller (150) being arranged on both sides of the feed belt (200a) in the thickness direction, respectively.

10. A pole piece thermal composite device, comprising the thermal composite pole piece adjustment mechanism according to any one of claims 1 to 9, and further comprising a frame (1), wherein the thermal composite pole piece adjustment mechanism is mounted on the frame (1).

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