System for preparing copper-lithium composite sheets

Abstract

A system for preparing copper-lithium composite sheets (103). The system comprises at least one unwinding assembly (20). The unwinding assembly (20) comprises: a main unwinding mechanism, which comprises a main unwinding roller (201), a main winding roller (202) and a conveying roller (2013) that are arranged in sequence in a Y direction; and a tape-splicing mechanism (204), which is located between the main unwinding roller (201) and the main winding roller (202), wherein the tape-splicing mechanism (204) comprises two adsorption members (2044) movably arranged in an X direction, with each adsorption member (2044) having two adsorption stations arranged in sequence in the Y direction, each adsorption station having a vacuum state for adsorbing a material tape and a vacuum-breaking state for releasing the material tape, and the X direction and the Y direction being set at an included angle. The configuration solves the problem in the prior art that manual tape splicing is mostly used, which easily leads to poor tape splicing accuracy.

Description

System for preparing copper-lithium composite sheets

[0001] This application claims priority to the patent application filed on June 28, 2024, with China National Intellectual Property Administration, application number 202410873153.0, entitled "System for Preparing Copper-Lithium Composite Sheets". Technical Field

[0002] This invention relates to the field of lithium-ion battery technology, and more specifically, to a system for preparing copper-lithium composite sheets. Background Technology

[0003] To address the problem of reduced battery capacity during the first charge of lithium-ion batteries due to the irreversible consumption of positive electrode lithium ions by the solid electrolyte membrane (SEI membrane), the industry has gradually considered adopting a lithium replenishment process: a lithium source connected to the negative electrode of the cell is placed inside the cell, and after the electrolyte is injected, lithium ions migrate to the negative electrode under the influence of the potential difference.

[0004] However, in the process of combining lithium strips with separator strips and copper strips, in order to achieve continuous production, the new and old strips need to be spliced. Currently, manual splicing is often used, which can easily lead to poor splicing accuracy. Summary of the Invention

[0005] The main objective of this invention is to provide a system for preparing copper-lithium composite sheets, in order to solve the problem that the existing technology often uses manual splicing, which easily leads to poor splicing accuracy.

[0006] To achieve the above objectives, the present invention provides a system for preparing copper-lithium composite sheets, comprising at least one unwinding assembly, the unwinding assembly comprising: a main unwinding mechanism, including a main unwinding roller, a main take-up roller and a conveying roller arranged sequentially along the Y direction; and a tape receiving mechanism located between the main unwinding roller and the main take-up roller, the tape receiving mechanism including two adsorption components movably arranged along the X direction; wherein each adsorption component has two adsorption stations arranged sequentially along the Y direction, each adsorption station having a vacuum state for adsorbing the tape and a vacuum breaking state for releasing the tape, and the X direction and Y direction are arranged at an angle.

[0007] With the above settings, compared to the poor splicing accuracy caused by manually aligning the main material strip and the spare material strip in the prior art, the splicing accuracy can be improved by using the splicing mechanism 204 to align the main material strip and the spare material strip.

[0008] Furthermore, the unwinding assembly has a tape receiving channel extending along the Y direction; the unwinding assembly also includes a backup unwinding mechanism, with the main unwinding mechanism and the backup unwinding mechanism located on both sides of the tape receiving channel along the X direction, and the backup unwinding mechanism including a backup unwinding roller and a backup take-up roller spaced apart along the Y direction; one of the two adsorption components is located between the main unwinding roller and the main take-up roller, and the other adsorption component is located between the backup unwinding roller and the backup take-up roller.

[0009] With the above setup, by setting up a main unwinding mechanism and a backup unwinding mechanism, the main unwinding roller can unwind the main material strip (copper strip, lithium strip, or diaphragm strip) and convey it to the composite assembly for lamination via the conveyor roller. The backup unwinding mechanism can tension the backup material strip (copper strip, lithium strip, or diaphragm strip). When the main material strip is gradually depleted, the two adsorption components move simultaneously towards each other along the X direction until the main material strip and the backup material strip are clamped together. The main material strip and the backup material strip are then cut by a cutter. Then, the upper adsorption station of the adsorption component on the side where the main unwinding mechanism is located (the adsorption station near the main take-up roller) is in a vacuum state, and the backup unwinding begins. The lower adsorption station of the adsorption component on the side where the mechanism is located (the adsorption station near the spare unwinding roller) is in a vacuum state, and the remaining adsorption stations are in a vacuum-breaking state. Then, the two adsorption components are moved away from each other synchronously. At this time, the end of the main material strip and the beginning of the spare material strip are detached because they are not adsorbed, and are wound and collected by the main winding roller and the spare winding roller, respectively. Then, the two adsorption components are moved towards each other again until the main material strip and the spare material strip are clamped at the same time to achieve docking of the main material strip and the spare material strip. At the same time, the two adsorption stations of the adsorption component on the side where the main unwinding mechanism is located are in a vacuum state, and the spare unwinding mechanism... The two adsorption stations of the adsorption component on the side of the main unwinding mechanism are in a vacuum-breaking state, so that the main material strip and the spare material strip are simultaneously adsorbed onto the adsorption component on the side of the main unwinding mechanism. Then, the two adsorption components are moved away from each other synchronously to facilitate the bonding of one side of the main material strip and the spare material strip with adhesive tape. Then, the two adsorption components are moved towards each other synchronously again until the main material strip, the spare material strip, and the adhesive tape are clamped simultaneously, so that the two adsorption stations of the adsorption component on the side of the spare unwinding mechanism are in a vacuum state, and the two adsorption stations of the adsorption component on the side of the main unwinding mechanism are in a vacuum-breaking state. Then, the two adsorption components are moved towards each other synchronously. The main and spare tapes are separated from the adsorption components on the side where the main unwinding mechanism is located, so that the other side of the main and spare tapes can be connected by tape to achieve the splicing between the main and spare tapes. In this way, compared with the prior art, which uses manual alignment of the main and spare tapes, resulting in poor splicing accuracy and low composite sheet quality, the present invention uses a splicing mechanism to align the main and spare tapes, which not only improves the splicing accuracy, but also avoids direct contact of the tapes by human hands, thereby improving the quality of the composite sheet. It also allows for the winding of the remaining cut spare tape.

[0010] Furthermore, the adsorption component is provided with a first chamber and a second chamber, which are spaced apart along the Y direction; the side of the adsorption component facing the receiving channel is provided with a plurality of first through holes and a plurality of second through holes, which are connected to the first chamber and the second through holes are connected to the second chamber.

[0011] With the above configuration, the first and second chambers of each adsorption component are connected to a vacuum source, so that multiple first through holes and multiple second through holes can respectively form two adsorption stations capable of adsorbing the material strip.

[0012] Furthermore, one of the two adsorption components is provided with a strip cutting component, which is located between the first chamber and the second chamber. The strip cutting component is movably arranged along the X direction so that it can extend into the tape receiving channel.

[0013] With the above setup, as the main strip gradually runs out, the two adsorption components move simultaneously towards each other along the X-axis until they clamp the main strip and the spare strip at the same time. This allows the strip cutting component to move along the X-axis into the tape receiving channel to cut the main strip and the spare strip simultaneously. Then, the upper adsorption station of the adsorption component on the side of the main unwinding mechanism is in a vacuum state, the lower adsorption station of the adsorption component on the side of the spare unwinding mechanism is in a vacuum state, and the remaining adsorption stations are in a vacuum-breaking state. Then, the two adsorption components move away from each other synchronously. At this time, the end of the main strip and the beginning of the spare strip are detached because they are not adsorbed, and are wound and collected by the main winding roller and the spare winding roller, respectively. This avoids the problem of manually cutting the main strip and the spare strip, thus preventing the main strip and the spare strip from being contaminated due to accidental contact by human hands, thereby improving the quality of the composite sheet.

[0014] Furthermore, the tape receiving mechanism also includes a tape receiving component, which includes: a tape unwinding roller; a first gripper; and a second gripper. Along the Y direction, the main unwinding roller, the tape unwinding roller, the first gripper, the adsorption component, and the second gripper are arranged sequentially. The second gripper is movably arranged along the Y direction and has a clamping position close to the first gripper and a pull-out position away from the first gripper.

[0015] With the above configuration, the first gripper holds the tape released from the tape unwinding roller. When the main tape and the spare tape are simultaneously adsorbed onto the adsorption component on the side of the main unwinding mechanism, the two adsorption components move away from each other synchronously. This allows the second gripper to move along the Y direction, pull the tape out of the first gripper, and return to its initial position. The adsorption component on the side of the spare unwinding mechanism moves to the tape, and both adsorption stations are in a vacuum state, allowing the tape to be adsorbed onto the adsorption component on the side of the spare unwinding mechanism. The tape is then cut with a cutter. The adsorption component on the side of the spare unwinding mechanism moves along the X direction toward the side of the main unwinding mechanism and attaches the tape to the tape joint. This allows the tape to be used to bond one side of the main tape and the spare tape, avoiding manual bonding of the main tape and spare tape, thus preventing contamination of the main tape and spare tape due to accidental human contact and improving the quality of the composite sheet.

[0016] Furthermore, the tape receiving mechanism includes two tape receiving components along the X direction, with the two tape receiving components located on both sides of the tape receiving channel, and the two tape receiving components respectively corresponding to the two adsorption components.

[0017] The above settings enable automatic connection of the main material belt and the spare material belt.

[0018] Furthermore, the system for preparing copper-lithium composite sheets also includes a composite assembly and three unwinding assemblies arranged in parallel. The copper strip, lithium strip, and separator strip are unwound by the three unwinding assemblies and then enter the composite assembly for composite to form a copper-lithium composite strip.

[0019] With the above settings, the new and old material strips of copper strip, lithium strip and separator strip can be automatically spliced, which can not only improve the splicing accuracy, but also avoid direct contact between human hands and material strips, thereby improving the quality of composite sheets.

[0020] Furthermore, the composite component includes: a composite roller; a pressure roller mechanism including a frame and a first pressure roller and a second pressure roller rotatably disposed on the frame, with a roller pressing channel between the first pressure roller and the second pressure roller, and the copper strip, lithium strip and diaphragm strip being conveyed to the roller pressing channel via the composite roller.

[0021] With the above configuration, the first and second pressure rollers can press the copper strip, lithium strip, and diaphragm strip together to form a copper-lithium composite strip.

[0022] Furthermore, the first pressure roller and / or the second pressure roller are provided with an oil storage cavity and an oil inlet pipe communicating with the oil storage cavity.

[0023] With the above setup, heat-conducting oil at a certain temperature can be introduced through the oil inlet pipe to heat at least one of the first and second pressure rollers, thereby facilitating the pressing of copper strip, lithium strip and diaphragm strip into copper-lithium composite strip.

[0024] Furthermore, the second pressure roller is movably disposed relative to the first pressure roller so that the second pressure roller can move closer to or further away from the first pressure roller.

[0025] With the above settings, the second pressure roller can be moved away from the first pressure roller to facilitate the entry of copper strip, lithium strip and diaphragm strip into the roller pressing channel, or the second pressure roller can be moved closer to the first pressure roller to press the copper strip, lithium strip and diaphragm strip into a copper-lithium composite strip; at the same time, the distance between the first pressure roller and the second pressure roller can be adjusted by moving the second pressure roller.

[0026] Furthermore, an adjusting roller is provided between the composite roller and the pressure roller mechanism, and the adjusting roller is movably arranged along the Y direction; and / or, a plurality of adjusting rollers arranged in rows and columns are provided downstream of the pressure roller mechanism, and each adjusting roller is movably arranged along the X direction.

[0027] With the above setup, the three-layer strip passes through the composite roller and enters the adjusting roller. The adjusting roller can be driven to reciprocate along the Y direction, thereby adjusting the wrap angle of the three-layer strip as it enters the pressure roller mechanism. Then, the three-layer strip is rolled by the first and second pressure rollers to form a copper-lithium composite strip, which then passes through the adjusting rollers at the rear end in sequence. The adjusting rollers downstream of the pressure roller mechanism can be driven to reciprocate along the X direction, thereby adjusting the buffer length of the copper-lithium composite strip. The adjusting rollers downstream of the pressure roller mechanism can move independently. The copper-lithium composite strip that has passed through multiple adjusting rollers can enter the cutting assembly and the transfer assembly.

[0028] Furthermore, the system for preparing copper-lithium composite sheets also includes a cutting component and a transfer component, which are located downstream of the composite component. The cutting component is used to cut the copper-lithium composite strip into multiple copper-lithium composite sheets.

[0029] With the above setup, the copper-lithium composite strip can enter the cutting component to form multiple copper-lithium composite sheets, and the multiple copper-lithium composite sheets can enter the transfer component for material transfer and unloading.

[0030] Furthermore, the transfer assembly includes: a transfer mechanism having a conveying surface for conveying copper-lithium composite sheets; a vision inspection mechanism having a detection end for detecting the size of the copper-lithium composite sheets, the detection end being disposed facing the conveying surface; a sorting mechanism having a sorting surface capable of receiving the copper-lithium composite sheets conveyed by the transfer mechanism; and a receiving mechanism having the sorting surface being disposed facing the receiving mechanism, the receiving mechanism including a first collecting structure, a second collecting structure, a first discharging structure, and a second discharging structure arranged sequentially, the sorting mechanism being used to convey multiple copper-lithium composite sheets to the first collecting structure, the second collecting structure, the first discharging structure, and the second discharging structure respectively.

[0031] With the above setup, the transfer mechanism conveys the cut copper-lithium composite sheet to the vision inspection mechanism. After the vision inspection mechanism inspects the dimensions of the cut sheet, the copper-lithium composite sheet is transferred to the sorting mechanism. Class A defective products and Class B defective products are then conveyed to the first collection structure and the second collection structure, respectively, while Class A good products and Class B good products are conveyed to the first unloading structure and the second unloading structure, respectively.

[0032] Furthermore, the sorting mechanism is located above the receiving mechanism and includes: multiple drive rollers; a belt wound around the multiple drive rollers, the multiple drive rollers driving the belt to rotate cyclically, the belt having multiple adsorption holes, and the lower surface of the belt forming a sorting surface; an adsorption structure having multiple vacuum chambers arranged independently in sequence and multiple vent holes communicating with each vacuum chamber, the vent holes being located on the side of the vacuum chamber facing the sorting surface, four of the multiple vacuum chambers being respectively arranged corresponding to the first collecting structure, the second collecting structure, the first discharging structure, and the second discharging structure; and a vacuum breaking component for breaking the vacuum in the vacuum chambers, the four vacuum chambers respectively arranged corresponding to the first collecting structure, the second collecting structure, the first discharging structure, and the second discharging structure all having a vacuum breaking component.

[0033] With the above configuration, each vacuum chamber can be connected to multiple adsorption holes at corresponding positions on the belt through multiple vent holes, and the multiple vacuum chambers can be connected to a vacuum source to form a negative pressure on the sorting surface of the belt, thereby adsorbing multiple copper-lithium composite sheets and driving the belt to rotate in a cycle, which can move multiple copper-lithium composite sheets. The four vacuum chambers corresponding to the first collection structure, the second collection structure, the first feeding structure and the second feeding structure can be in a vacuum-breaking state through the vacuum breaking component, so that multiple copper-lithium composite sheets can be released at different positions, so that multiple copper-lithium composite sheets can be classified and placed in the corresponding first collection structure, second collection structure, first feeding structure and second feeding structure, thereby improving the efficiency of copper-lithium composite sheet preparation.

[0034] Furthermore, the transfer assembly also includes a cleaning mechanism, which includes: a dust collection box, the dust collection box including a box body and a vacuum line, the box body having a dust collection chamber and an opening communicating with the dust collection chamber, the vacuum line communicating with the dust collection chamber; and a brush roller, rotatably mounted in the dust collection chamber, with a portion of the brush roller protruding from the box body and in contact with the belt.

[0035] The above settings allow for dust removal by brushing the belt.

[0036] By applying the technical solution of this invention, and by setting up a tape-connecting mechanism, when the main material tape is gradually used up, the two adsorption components move simultaneously towards each other along the X direction until the main material tape and the spare material tape are clamped together. The main material tape and the spare material tape are then cut off by a cutter. The upper adsorption station of the left adsorption component is in a vacuum state, the lower adsorption station of the right adsorption component is in a vacuum state, and the remaining adsorption stations are in a vacuum-broken state. Then, the two adsorption components are moved away from each other synchronously. At this time, the end of the main material tape and the beginning of the spare material tape are detached because they have not been adsorbed. Then, the two adsorption components move simultaneously towards each other again until the main material tape and the spare material tape are clamped together, thus achieving the docking of the main material tape and the spare material tape. Simultaneously, both adsorption stations of the left adsorption component are in a vacuum state, and both adsorption stations of the right adsorption component are in a vacuum-broken state, so that the main material tape and the spare material tape are simultaneously... The material is adsorbed onto the adsorption component on the left. Then, the two adsorption components are moved away from each other synchronously to allow the adhesive tape to be used to bond one side of the main material strip and the spare material strip. Then, the two adsorption components are moved towards each other again until the main material strip, the spare material strip, and the adhesive tape are clamped together. This puts the two adsorption positions of the adsorption component on the right under a vacuum and the two adsorption positions of the adsorption component on the left under a vacuum. Then, the two adsorption components are moved away from each other synchronously, and the main material strip and the spare material strip are no longer in contact with the adsorption component on the left. This allows the adhesive tape to be used to connect the other side of the main material strip and the spare material strip, thus achieving the connection between the main material strip and the spare material strip. In this way, compared with the existing technology that uses manual alignment of the main material strip and the spare material strip, resulting in poor splicing accuracy, the present invention can improve the splicing accuracy by using a splicing mechanism to align the main material strip and the spare material strip. Attached Figure Description

[0037] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0038] Figure 1 shows a schematic diagram of the structure of an embodiment of the copper-lithium composite sheet with cell coating of the present invention; and

[0039] Figure 2 shows a schematic diagram of the structure of two different types of copper-lithium composite sheets corresponding to the present invention.

[0040] Figure 3 shows a schematic diagram of the system for preparing copper-lithium composite sheets according to the present invention;

[0041] Figure 4 shows a schematic diagram of the unwinding assembly of the system used to prepare copper-lithium composite sheets in Figure 3;

[0042] Figure 5 shows a schematic diagram of the tape splicing mechanism of the unwinding assembly in Figure 4 from one angle;

[0043] Figure 6 shows a structural schematic diagram of the tape-connecting mechanism of the unwinding assembly in Figure 4 from another angle;

[0044] Figures 7 to 10 show schematic diagrams of the bonding process of the system for preparing copper-lithium composite sheets according to the present invention;

[0045] Figure 11 shows a schematic diagram of the dust removal mechanism of the unwinding assembly in Figure 4;

[0046] Figure 12 shows a schematic diagram of the structure of the copper strip after laser cutting according to the present invention;

[0047] Figure 13 shows a left view of the two main unwinding mechanisms of the lithium strip in Figure 4;

[0048] Figure 14 shows a schematic diagram of the composite component of the system used to prepare copper-lithium composite sheets in Figure 3;

[0049] Figure 15 shows a schematic diagram of the pressure roller mechanism of the composite component in Figure 3;

[0050] Figure 16 shows a front view of the pressure roller mechanism in Figure 3;

[0051] Figure 17 shows a left view of the pressure roller mechanism in Figure 3;

[0052] Figure 18 shows a schematic diagram of the transfer assembly of the system used to prepare copper-lithium composite sheets in Figure 3;

[0053] Figure 19 shows a structural schematic diagram of the sorting mechanism and the transfer mechanism of the transfer assembly in Figure 18 at one angle;

[0054] Figure 20 shows a top view of the transfer assembly of Figure 19;

[0055] Figure 21 shows a structural schematic diagram of the sorting mechanism and the transfer mechanism of the transfer assembly in Figure 18 from another angle;

[0056] Figure 22 shows a schematic diagram of the adsorption structure of the transfer mechanism in Figure 21;

[0057] Figure 23 shows another schematic diagram of the adsorption structure of the transfer mechanism in Figure 21;

[0058] Figure 24 shows a schematic diagram of the adsorption structure of the sorting mechanism in Figure 21;

[0059] Figure 25 shows another schematic diagram of the adsorption structure of the sorting mechanism in Figure 21;

[0060] Figure 26 shows a schematic diagram of the cleaning mechanism of the transfer assembly in Figure 21.

[0061] The above-mentioned figures include the following reference numerals: 10, battery cell; 101, positive electrode tab; 102, negative electrode tab; 103, copper-lithium composite sheet; 1031, copper strip; 1032, lithium strip; 1033, separator strip; 10311, copper electrode tab; 20, unwinding assembly; 201, main unwinding roller; 202, main take-up roller; 203, spare unwinding roller; 204, tape receiving mechanism; 205, spare take-up roller; 206, dust removal mechanism; 207, demagnetizing mechanism; 208, belt alignment mechanism; 209, tension control mechanism; 2010, laser cutting mechanism; 2011, static electricity removal mechanism; 2012, composite roller; 2013, conveyor roller; 2041, tape unwinding roller; 2042, first gripper; 2043, cutter; 2044, adsorption component; 20441, first through hole; 20442, Second through hole; 2046, Strip cutting component; 2047, Second gripper; 2061, Upper dust removal component; 2062, Lower dust removal component; 30, Composite component; 301, Adjusting roller; 302, First pressure roller; 303, Second pressure roller; 304, Oil inlet pipe; 305, First inclined block; 306, Second inclined block; 307, Second guide rail; 308, First guide rail; 309, Second electric cylinder; 3010, First electric cylinder; 3011, First motor; 40, Transfer component; 401, Feed roller; 402, Cutting component; 403, Vision inspection mechanism; 404, Transfer mechanism; 405. Sorting mechanism; 406. First collection structure; 407. Second collection structure; 408. First feeding structure; 409. Second feeding structure; 4010. Belt; 4011. Drive roller; 4012. Tension roller; 4013. Adsorption structure; 4014. Cleaning mechanism; 40131. Partition; 40132. Vacuum pipeline; 40133. Cover plate; 40134. Vacuum breaking component; 40141. Brush roller; 40142. Second motor; 40143. Box body. Detailed Implementation

[0062] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0063] As shown in Figure 1, in an embodiment of the present invention, after the battery cell 10 is covered with a copper-lithium composite sheet 103, the battery cell 10 includes a positive electrode tab 101 and a negative electrode tab 102. After the copper electrode tab 10311 and the negative electrode tab 102 on the copper-lithium composite sheet 103 are attached to each other, they are then welded together using an ultrasonic welding machine.

[0064] In an embodiment of the present invention, Figure 2 is a schematic diagram of the structure of the copper-lithium composite sheet 103 corresponding to two different types of battery cells. Since there are battery cells A and B inside the lithium battery, the relative positions of their positive and negative electrodes are different. Therefore, the positions of the copper electrodes 10311 corresponding to the copper-lithium composite sheet 103 are also different. The copper-lithium composite sheet 103 is formed by bonding copper strip 1031, lithium strip 1032, and separator strip 1033 together under high temperature and high pressure. In this invention, two lithium strips 1032 are placed in the interlayer of copper strip 1031 and separator strip 1033. It is worth noting that the present invention does not limit the specific width, quantity, length, thickness, etc. of the lithium strip 1032 in the interlayer formed by the copper strip 1031 and the separator strip 1033, but preferably, the total width of the lithium strip ≤ the width of the copper strip ≤ the width of the separator strip; when the copper-lithium composite sheet 103 is coated with the battery cell 10, the copper strip 1031 contacts and adheres to the outer surface of the battery cell, and after the coating is completed, the separator strip 1033 on the copper-lithium composite sheet 103 is located on the outermost side. The copper strip 1031 is made of copper strip.

[0065] It should be noted that in the embodiments of the present invention, the Y direction is the up-down direction in Figure 1, and the X direction is the left-right direction in Figure 1.

[0066] As shown in Figures 3 to 10, embodiments of the present invention provide a system for preparing copper-lithium composite sheets. The system for preparing copper-lithium composite sheets includes at least one unwinding assembly 20, which includes: a main unwinding mechanism comprising a main unwinding roller 201, a main take-up roller 202, and a conveyor roller 2013 arranged sequentially along the Y direction; and a tape receiving mechanism 204 located between the main unwinding roller 201 and the main take-up roller 202. The tape receiving mechanism 204 includes two adsorption members 2044 movably arranged along the X direction; wherein each adsorption member 2044 has two adsorption stations arranged sequentially along the Y direction, each adsorption station having a vacuum state for adsorbing the tape and a vacuum-breaking state for releasing the tape, and the X direction and Y direction are arranged at an angle.

[0067] In the above technical solution, by setting up a tape-connecting mechanism 204, when the main material tape is gradually used up, the two adsorption components 2044 move towards each other simultaneously along the X direction until the main material tape and the spare material tape are clamped together. The main material tape and the spare material tape are then cut off by a cutter. The upper adsorption station of the left adsorption component is in a vacuum state, the lower adsorption station of the right adsorption component is in a vacuum state, and the remaining adsorption stations are in a vacuum-broken state. Then, the two adsorption components 2044 are moved away from each other synchronously. At this time, the end of the main material tape and the beginning of the spare material tape are detached because they have not been adsorbed. Then, the two adsorption components 2044 move towards each other simultaneously again until the main material tape and the spare material tape are clamped together, thus achieving the docking of the main material tape and the spare material tape. Simultaneously, both adsorption stations of the left adsorption component 2044 are in a vacuum state, and both adsorption stations of the right adsorption component 2044 are in a vacuum-broken state, so that the main material tape and the spare material tape are simultaneously adsorbed on the left. The two adsorption components 2044 are moved away from each other simultaneously to allow the main material strip and the spare material strip to be bonded together on one side using adhesive tape. Then, the two adsorption components 2044 are moved towards each other again until the main material strip, the spare material strip, and the adhesive tape are clamped together. This puts the two adsorption stations of the right adsorption component 2044 in a vacuum state and the two adsorption stations of the left adsorption component 2044 in a vacuum-breaking state. Then, the two adsorption components 2044 are moved away from each other simultaneously, and the main material strip and the spare material strip are disengaged from the left adsorption component 2044. This allows the other side of the main material strip and the spare material strip to be connected using adhesive tape, thus achieving the connection between the main material strip and the spare material strip. In this way, compared with the prior art where the main material strip and the spare material strip are manually aligned, resulting in poor splicing accuracy, the present invention can improve the splicing accuracy by using the splicing mechanism 204 to align the main material strip and the spare material strip.

[0068] As shown in Figures 3 to 10, in an embodiment of the present invention, the unwinding assembly 20 has a tape receiving channel extending along the Y direction; the unwinding assembly 20 also includes a spare unwinding mechanism, with the main unwinding mechanism and the spare unwinding mechanism located on both sides of the tape receiving channel along the X direction, and the spare unwinding mechanism including a spare unwinding roller 203 and a spare take-up roller 205 spaced apart along the Y direction; one of the two adsorption members 2044 is located between the main unwinding roller 201 and the main take-up roller 202, and the other adsorption member 2044 is located between the spare unwinding roller 203 and the spare take-up roller 205.

[0069] In the above technical solution, by setting a main unwinding mechanism and a backup unwinding mechanism, the main unwinding roller 201 can unwind the main material strip (copper strip 1031, lithium strip 1032, or diaphragm strip 1033) and convey it to the composite assembly 30 for composite via the conveying roller 2013. The backup unwinding mechanism can tension the backup material strip (copper strip 1031, lithium strip 1032, or diaphragm strip 1033). When the main material strip is gradually used up, the two adsorption components 2044 move towards each other simultaneously along the X direction until the main material strip and the backup material strip are clamped at the same time. The main material strip and the backup material strip are cut by a cutter, and then the upper adsorption station of the adsorption component on the side where the main unwinding mechanism is located (close to the main unwinding mechanism) is activated. The adsorption station of the winding roller 202 is in a vacuum state, the lower adsorption station of the adsorption component on the side of the standby unwinding mechanism (adsorption station near the standby unwinding roller 203) is in a vacuum state, and the remaining adsorption stations are in a vacuum-breaking state. Then, the two adsorption components 2044 are moved away from each other synchronously. At this time, the end of the main material strip and the beginning of the standby material strip are detached because they are not adsorbed, and are respectively wound and collected by the main winding roller 202 and the standby winding roller 205. Then, the two adsorption components 2044 are moved towards each other simultaneously again until the main material strip and the standby material strip are clamped at the same time to realize the docking of the main material strip and the standby material strip. At the same time, the adsorption components on the side of the main unwinding mechanism are moved away from each other. The two adsorption stations of 2044 are in a vacuum state, and the two adsorption stations of the adsorption component 2044 on the side of the standby unwinding mechanism are in a vacuum-breaking state, so that the main material strip and the standby material strip are simultaneously adsorbed onto the adsorption component 2044 on the side of the main unwinding mechanism. Then, the two adsorption components 2044 are moved away from each other synchronously to facilitate the bonding of one side of the main material strip and the standby material strip with adhesive tape. Then, the two adsorption components 2044 are moved towards each other again until the main material strip, the standby material strip, and the adhesive tape are clamped simultaneously, so that the two adsorption stations of the adsorption component 2044 on the side of the standby unwinding mechanism are in a vacuum state, and the adsorption component 2044 on the side of the main unwinding mechanism is in a vacuum state. The two adsorption stations at position 4 are in a vacuum-breaking state. Then, the two adsorption components 2044 are moved away from each other synchronously. The main material strip and the spare material strip are both disengaged from the adsorption component 2044 on the side where the main unwinding mechanism is located. This allows the other side of the main material strip and the spare material strip to be connected using tape, thus achieving the connection between the main material strip and the spare material strip. In contrast to the prior art where manual alignment of the main material strip and the spare material strip leads to poor splicing accuracy and low composite sheet quality, in this invention, by using the splicing mechanism 204 to align the main material strip and the spare material strip, not only can the splicing accuracy be improved, but also direct contact between human hands and the material strip can be avoided, thereby improving the quality of the composite sheet.

[0070] It should be noted that, in the embodiments of the present invention, the spare unwinding roller 203 tensions the spare strip after unwinding through the spare take-up roller 205.

[0071] It should be noted that, in the embodiments of the present invention, the side where the main unwinding mechanism is located refers to the left side of the tape receiving channel in Figure 4, and the side where the spare unwinding mechanism is located refers to the right side of the tape receiving channel in Figure 4.

[0072] As shown in Figures 5 and 6, in an embodiment of the present invention, the adsorption member 2044 is provided with a first chamber and a second chamber, which are spaced apart along the Y direction; the adsorption member 2044 is provided with a plurality of first through holes 20441 and a plurality of second through holes 20442 on the side facing the receiving channel, the plurality of first through holes 20441 communicating with the first chamber and the plurality of second through holes 20442 communicating with the second chamber.

[0073] With the above configuration, the first chamber and the second chamber of each adsorption component 2044 are connected to a vacuum source, so that multiple first through holes 20441 and multiple second through holes 20442 can respectively form two adsorption stations capable of adsorbing the material strip.

[0074] Preferably, in an embodiment of the present invention, the system for preparing copper-lithium composite sheets further includes a vacuum source, a pipeline connecting the vacuum source to a first chamber, a pipeline connecting the vacuum source to a second chamber, and control valves disposed on each pipeline, so as to keep the first chamber and / or the second chamber of each adsorption component 2044 under vacuum. The arrangement of the above-mentioned pipelines and control valves can adopt existing technology, and will not be described in detail here.

[0075] As shown in Figures 5 and 6, in an embodiment of the present invention, one of the two adsorption components 2044 is provided with a strip cutting component 2046. The strip cutting component 2046 is located between the first chamber and the second chamber. The strip cutting component 2046 is movably arranged along the X direction so that the strip cutting component 2046 can extend into the tape receiving channel.

[0076] With the above setup, as the main strip gradually runs out, the two adsorption components 2044 move simultaneously towards each other along the X direction until the main strip and the spare strip are clamped together. This allows the strip cutting component 2046 to move along the X direction into the tape receiving channel to simultaneously cut the main strip and the spare strip. Then, the upper adsorption station of the adsorption component on the side of the main unwinding mechanism (the adsorption station near the main winding roller 202) is placed in a vacuum state, while the lower adsorption station of the adsorption component on the side of the spare unwinding mechanism (the adsorption station near the spare unwinding roller 204) is placed in a vacuum state. The adsorption station 3 is in a vacuum state, and the remaining adsorption stations are in a vacuum-breaking state. Then, the two adsorption components 2044 are moved away from each other synchronously. At this time, the end of the main material belt and the beginning of the spare material belt are detached because they are not adsorbed, and are wound and collected by the main winding roller 202 and the spare winding roller 205 respectively. In this way, manual cutting of the main material belt and the spare material belt can be avoided, so as to avoid the problem of contamination of the main material belt and the spare material belt due to accidental contact with the main material belt and the spare material belt by human hands, thereby improving the quality of the composite sheet.

[0077] In one embodiment, the main material strip and the spare material strip can also be cut manually.

[0078] Preferably, in an embodiment of the present invention, the strip cutting component 2046 is a cutter.

[0079] As shown in Figure 8, in an embodiment of the present invention, the tape receiving mechanism 204 further includes a tape receiving component, which includes: a tape unwinding roller 2041; a first gripper 2042; and a second gripper 2047. Along the Y direction, the main unwinding roller 201, the tape unwinding roller 2041, the first gripper 2042, the adsorption component 2044, and the second gripper 2047 are arranged sequentially. The second gripper 2047 is movably arranged along the Y direction and has a clamping position close to the first gripper 2042 and a pulling-out position away from the first gripper 2042.

[0080] With the above configuration, the first gripper 2042 clamps the tape released from the tape unwinding roller 2041. When the main tape and the spare tape are simultaneously adsorbed onto the adsorption member 2044 on the side where the main unwinding mechanism is located, the two adsorption members 2044 move away from each other synchronously. This allows the second gripper 2047 to move along the Y direction, pull the tape out of the first gripper 2042, and return to its initial position. The adsorption member on the side where the spare unwinding mechanism is located moves to the tape, and both adsorption stations are in a vacuum state, allowing the tape to be adsorbed. On the adsorption member 2044 located on the side of the standby unwinding mechanism, the tape is cut with a cutter. Then, the adsorption member 2044 on the side of the standby unwinding mechanism moves along the X direction towards the side of the main unwinding mechanism and applies the tape to the joint of the material strips. This allows for the use of tape to bond one side of the main material strip and the standby material strip, avoiding manual bonding of the main material strip and the standby material strip, thus preventing contamination of the main material strip and the standby material strip due to accidental human contact and improving the quality of the composite sheet. Similarly, the tape can be used to connect the other side of the main material strip and the standby material strip to achieve automatic splicing between the main material strip and the standby material strip.

[0081] Preferably, in an embodiment of the present invention, the tape-connecting member further includes a cutter 2043 movably disposed along the X direction to cut the tape, the cutter 2043 being located between the first gripper 2042 and the adsorption member 2044.

[0082] As shown in Figures 8 and 9, in this embodiment of the invention, the tape-attaching mechanism 204 includes two tape-attaching members located on both sides of the tape-attaching channel along the X direction. The two tape-attaching members are respectively disposed corresponding to two adsorption members 2044. There are two cutters 2043, which are disposed corresponding to the two tape-attaching members.

[0083] With the above setup, while the main material strip and the spare material strip are clamped simultaneously, the two adsorption stations of the adsorption component 2044 on the side where the main unwinding mechanism is located (left side in Figure 8) are in a vacuum state, and the two adsorption stations of the adsorption component 2044 on the side where the spare unwinding mechanism is located (right side in Figure 8) are in a vacuum-breaking state. The main material strip and the spare material strip are simultaneously adsorbed onto the adsorption component 2044 on the left. After the two adsorption components 2044 move away from each other synchronously, the second gripper 2047 on the right moves downward along the Y direction, pulls out the tape from the corresponding first gripper 2042, and returns to the initial position. The adsorption component 2044 on the right moves to the tape, and the two adsorption stations are in a vacuum state, so that the tape is adsorbed onto the adsorption component 2044 on the right. Then, the tape is cut by the cutter 2043 on the right, and the adsorption component 2044 on the right moves along the X direction to attach the tape to the joint of the material strips. Similarly, after the right-side adsorption component 2044 applies the tape to the joint of the material strip, both adsorption stations of the right-side adsorption component 2044 maintain a vacuum state. At this time, both adsorption stations of the left-side adsorption component 2044 maintain a vacuum state. After the two adsorption components 2044 move away from each other simultaneously, the material strip loses contact with the left-side adsorption component 2044. The left-side second gripper 2047 moves downward along the Y direction, pulls the tape out from the left-side first gripper 2042, and returns to its initial position. The left-side adsorption component 2044 moves to the tape, and since both adsorption stations are in a vacuum state, the tape adheres to the left-side adsorption component 2044. Then, the left-side cutter 2043 cuts the tape, and the left-side adsorption component 2044 moves along the X direction to apply the tape to the joint of the material strip. In this way, the automatic splicing of the main material strip and the spare material strip can be realized.

[0084] It should be noted that, in the embodiments of the present invention, a strip cutting member 2046 is provided inside the adsorption member 2044 on the side where the main unwinding mechanism is located. The first through hole 20441 and the second through hole 20442 on the same adsorption member 2044 are independently controlled. The first gripper 2042 and the second gripper 2047 are both controlled to open and close by a cylinder, and the second gripper 2047 can be reciprocated along the Y direction by a driving mechanism (such as a cylinder). The cutter 2043, the strip cutting member 2046 and the two adsorption members 2044 can all be reciprocated along the X direction by a driving mechanism (such as a cylinder). The strip cutting member 2046 can also be provided inside the adsorption member 2044 on the side where the spare unwinding mechanism is located.

[0085] As shown in Figure 10, in an embodiment of the present invention, after the adhesive is applied to both sides of the strip joint, the used main material roll is manually removed from the main unwinding roller 201 and replaced with a new main material roll. After the new main material roll is unwound, it is tensioned by the main winding roller 202. After the spare material roll is used up, the above steps are repeated to automatically connect the strip.

[0086] As shown in Figures 3 and 4, in an embodiment of the present invention, the system for preparing copper-lithium composite sheets includes a composite assembly 30 and three unwinding assemblies 20 arranged in parallel. Copper strip 1031, lithium strip 1032, and separator strip 1033 are unwound by the three unwinding assemblies 20 and then enter the composite assembly 30 for lamination to form a copper-lithium composite strip. This allows for automatic splicing of new and old strips of copper strip 1031, lithium strip 1032, and separator strip 1033, improving splicing accuracy and avoiding direct human contact with the strips, thereby improving the quality of the composite sheet.

[0087] Specifically, as shown in Figure 4, in this embodiment of the invention, after the copper strip 1031 on the main unwinding roller 201 is unwound, it passes sequentially through the strip receiving mechanism 204, the dust removal mechanism 206, the demagnetizing mechanism 207, the deviation correction mechanism 208, the tension control mechanism 209, and the laser cutting mechanism 2010. The strip receiving mechanism 204 automatically connects the main strip to the spare roll when the copper strip 1031 on the main unwinding roller 201 is exhausted. The dust removal mechanism 206 removes metal dust from the surface of the strip during its travel. The demagnetizing mechanism 207 removes iron impurities from the surface of the strip during its travel. The deviation correction mechanism 208 ensures that the strip does not deviate during its travel. The tension control mechanism 209 ensures that the tension of the strip remains within a reasonable range. The laser cutting mechanism 2010 cuts copper tabs 10311 into the copper strip 1031. Among them, the demagnetizing mechanism 207, the correction mechanism 208, the tension control mechanism 209 and the laser cutting mechanism 2010 can adopt existing technologies, which will not be described in detail here.

[0088] Specifically, as shown in Figure 11, in an embodiment of the present invention, the dust removal mechanism 206 includes an upper dust removal component 2061 and a lower dust removal component 2062 spaced apart. A material belt (copper belt 1031, lithium belt 1032, diaphragm belt 1033) is located between the upper dust removal component 2061 and the lower dust removal component 2062, forming a dust removal channel between them. Compressed air is introduced into the upper dust removal component 2061 through its inlet. The upper dust collector 2061 is equipped with a dust removal component 2061, and compressed air is introduced into the lower dust collector 2062 through the inlet of the upper dust collector 2061 and extracted through the outlet of the lower dust collector 2062. The upper dust collector 2061 has a dust removal through hole on the side facing the dust removal channel, and the lower dust collector 2062 has a dust removal through hole on the side facing the dust removal channel.

[0089] Specifically, as shown in Figure 12, in this embodiment of the invention, L is the length of the copper strip 1031 in a single copper-lithium composite sheet 103. The invention involves cutting the copper tabs 10311 required for cells A and B at intervals. As shown in Figure 2, for cell A, the distance M between the copper tab 10311 and the beginning of the single copper strip is M; for cell B, the distance M between the copper tab 10311 and the end of the single copper strip is M. The beginning and end are the two opposite ends along the length of the copper-lithium composite sheet.

[0090] Specifically, as shown in Figure 4, in an embodiment of the present invention, the unwinding assembly 20 for passing the lithium strip 1032 includes two main unwinding mechanisms, two standby unwinding mechanisms, and two tape receiving mechanisms 204. After the lithium strip 1032 on the main unwinding roller 201 is unwound, it passes sequentially through the tape receiving mechanism 204, the dust removal mechanism 206, the demagnetizing mechanism 207, the web guiding mechanism 208, and the tension control mechanism 209.

[0091] Specifically, as shown in Figure 13, in an embodiment of the present invention, the two main unwinding rollers 201 and the two spare unwinding rollers 203 are arranged in a staggered manner in space. Preferably, the two main unwinding rollers 201 are spaced apart along a direction perpendicular to the paper surface in Figure 4, and the two spare unwinding rollers 203 are spaced apart along a direction perpendicular to the paper surface in Figure 4.

[0092] Specifically, as shown in Figure 4, in the embodiment of the present invention, after the diaphragm belt 1033 on the main unwinding roller 201 is unwound, it passes sequentially through the belt receiving mechanism 204, the dust removal mechanism 206, the static elimination mechanism 2011, the web guiding mechanism 208, and the tension control mechanism 209. The function of the static elimination mechanism 2011 is to eliminate static electricity on the diaphragm belt 1033 and prevent wrinkles from appearing on the diaphragm belt during the unwinding process. The static elimination mechanism 2011 can adopt existing technology, which will not be described in detail here.

[0093] As shown in Figures 4 and 14 to 17, in an embodiment of the present invention, the composite component 30 includes: a composite roller 2012; a pressure roller mechanism including a frame and a first pressure roller 302 and a second pressure roller 303 rotatably disposed on the frame, wherein a roller pressing channel is provided between the first pressure roller 302 and the second pressure roller 303, and the copper strip 1031, the lithium strip 1032 and the diaphragm strip 1033 are conveyed to the roller pressing channel via the composite roller 2012.

[0094] With the above configuration, the first pressure roller 302 and the second pressure roller 303 can press the copper strip 1031, the lithium strip 1032 and the diaphragm strip into a copper-lithium composite strip.

[0095] Specifically, as shown in Figure 4, in an embodiment of the present invention, a copper strip 1031, two lithium strips 1032, and a diaphragm strip 1033 simultaneously enter the composite roller 2012 for composite and then enter the composite assembly 30 at the rear end.

[0096] As shown in Figure 15, in an embodiment of the present invention, the first pressure roller 302 and / or the second pressure roller 303 are provided with an oil storage cavity and an oil inlet pipe 304 communicating with the oil storage cavity. In this way, heat-conducting oil at a certain temperature can be introduced through the oil inlet pipe 304 to heat at least one of the first pressure roller 302 and the second pressure roller 303, thereby facilitating the pressing of the copper strip 1031, the lithium strip 1032 and the diaphragm strip into a copper-lithium composite strip.

[0097] As shown in Figures 15 to 17, in an embodiment of the present invention, the second pressure roller 303 is movably disposed relative to the first pressure roller 302, so that the second pressure roller 303 can move closer to or further away from the first pressure roller 302. This allows the second pressure roller 303 to move away from the first pressure roller 302 to facilitate the entry of the copper strip 1031, lithium strip 1032, and diaphragm belt 1033 into the rolling channel, or it can move closer to the first pressure roller 302 to press the copper strip 1031, lithium strip 1032, and diaphragm belt 1033 into a copper-lithium composite strip. Simultaneously, moving the second pressure roller 303 can adjust the distance between the first pressure roller 302 and the second pressure roller 303.

[0098] Specifically, as shown in Figures 15 to 17, in the embodiments of the present invention, the first pressure roller 302 and the second pressure roller 303 are driven to rotate by two first motors 3011, the first pressure roller 302 is fixedly installed in the frame, and the second pressure roller 303 is installed on the frame through the first guide rail 308. The first electric cylinder 3010 is fixed to the frame and can drive the second pressure roller 303 to move along the Y direction, so that the second pressure roller 303 can move closer to or away from the first pressure roller 302.

[0099] Specifically, as shown in Figures 15 to 17, in the embodiments of the present invention, the pressure roller mechanism further includes a first inclined block 305, a second inclined block 306 that abuts against the first inclined block 305, a second electric cylinder 309 for driving the first inclined block 305 to move along the X direction, and a second guide rail 307 fixed to the frame. The second pressure roller 303 is mounted on the first guide rail 308 through the second inclined block 306. The first inclined block 305 slides with the second guide rail 307. The first inclined block 305 moves to the left (along the X direction) on the second guide rail 307 in Figure 17, which can increase the gap between the first pressure roller 302 and the second pressure roller 303.

[0100] Specifically, as shown in Figures 15 to 17, in an embodiment of the present invention, the first inclined block 305 has a first inclined surface at one end facing the second inclined block 306, and the second inclined block 306 has a second inclined surface at one end facing the first inclined block 305. The first inclined surface and the second inclined surface have the same slope and are abutted together.

[0101] As shown in Figure 14, in an embodiment of the present invention, an adjusting roller 301 is provided between the composite roller 2012 and the pressure roller mechanism, and the adjusting roller 301 is movably arranged along the Y direction; and / or, a plurality of adjusting rollers 301 arranged in rows and columns are also provided downstream of the pressure roller mechanism, and each adjusting roller 301 is movably arranged along the X direction.

[0102] With the above setup, the three-layer strip (copper strip 1031, lithium strip 1032, and diaphragm strip 1033) passing through the composite roller 2012 enters the adjusting roller 301. The adjusting roller 301 can be moved back and forth along the Y direction by a drive mechanism (such as an electric cylinder) to adjust the wrap angle of the three-layer strip entering the pressure roller mechanism. Then, the three-layer strip is rolled by the first pressure roller 302 and the second pressure roller 303 to form a copper-lithium composite strip, which then passes through the adjusting rollers 301 at the rear end in sequence. The adjusting rollers 301 downstream of the pressure roller mechanism can be moved back and forth along the X direction by a drive mechanism (such as an electric cylinder) to adjust the buffer length of the copper-lithium composite strip. The adjusting rollers 301 downstream of the pressure roller mechanism can move independently. The copper-lithium composite strip passing through multiple adjusting rollers 301 can enter the cutting assembly 402 and the transfer assembly 40.

[0103] As shown in Figure 3, in an embodiment of the present invention, the system for preparing copper-lithium composite sheets further includes a cutting component 402 and a transfer component 40, which are located downstream of the composite component 30. The cutting component 402 is used to cut the copper-lithium composite strip into multiple copper-lithium composite sheets 103. In this way, the copper-lithium composite strip can enter the cutting component 402 to form multiple copper-lithium composite sheets 103, and the multiple copper-lithium composite sheets 103 can enter the transfer component 40 for transfer and unloading.

[0104] Preferably, as shown in FIG18, in an embodiment of the present invention, the system for preparing copper-lithium composite sheets further includes a feed roller 401 located between the composite component 30 and the cutting component 402, the feed roller 401 clamping and driving the copper-lithium composite strip forward.

[0105] As shown in Figure 18, in an embodiment of the present invention, the transfer assembly 40 includes: a transfer mechanism 404 having a conveying surface for conveying copper-lithium composite sheets 103; a visual inspection mechanism 403 having a detection end for detecting the size of the copper-lithium composite sheets 103, the detection end being disposed facing the conveying surface; a sorting mechanism 405 having a sorting surface capable of receiving the copper-lithium composite sheets 103 conveyed by the transfer mechanism 404; and a receiving mechanism having the sorting surface being disposed facing the receiving mechanism. The receiving mechanism includes a first collecting structure 406, a second collecting structure 407, a first discharging structure 408, and a second discharging structure 409 arranged sequentially. The sorting mechanism 405 is used to convey multiple copper-lithium composite sheets 103 to the first collecting structure 406, the second collecting structure 407, the first discharging structure 408, and the second discharging structure 409 respectively.

[0106] With the above setup, the transfer mechanism 404 conveys the cut copper-lithium composite sheet 103 to the vision inspection mechanism 403. After the vision inspection mechanism 403 inspects the dimensions of the cut sheet, the copper-lithium composite sheet 103 is transferred to the sorting mechanism 405. The defective A-type products (corresponding to copper-lithium composite sheets of A-cell) and defective B-type products (corresponding to copper-lithium composite sheets of B-cell) are conveyed to the first collection structure 406 and the second collection structure 407 respectively. The good A-type products (corresponding to copper-lithium composite sheets of A-cell) and good B-type products (corresponding to copper-lithium composite sheets of B-cell) are conveyed to the first unloading structure 408 and the second unloading structure 409 respectively.

[0107] Preferably, in an embodiment of the present invention, the cutting component 402 is a cutter.

[0108] It should be noted that in the embodiments of the present invention, the visual inspection mechanism 403 may adopt existing technology, which will not be described in detail here.

[0109] Specifically, in an embodiment of the present invention, the transfer mechanism 404 includes a plurality of drive rollers 4011, an adsorption structure 4013, and a belt 4010. The belt 4010 is wound around the plurality of drive rollers 4011, which drive the belt 4010 to rotate cyclically. The belt 4010 is provided with a plurality of adsorption holes, and the upper surface of the belt 4010 forms a conveying surface. The adsorption structure 4013 of the transfer mechanism 404 includes a housing with an opening and a plurality of partitions 40131 located inside the housing, dividing the interior of the housing into a plurality of independent vacuum chambers. Each vacuum chamber is connected to two sides by a vacuum pipe 40132, which is connected to the housing. A cover plate 40133 covers the opening of the housing, and the surface of the cover plate 40133 is provided with the aforementioned plurality of vent holes. The belt 4010 is located on the outer periphery of the adsorption structure 4013, and the plurality of vent holes are arranged facing the conveying surface.

[0110] As shown in Figures 18 to 25, in an embodiment of the present invention, the sorting mechanism 405 is located above the receiving mechanism. The sorting mechanism 405 includes: a plurality of drive rollers 4011; a belt 4010 wound around the plurality of drive rollers 4011, the plurality of drive rollers 4011 being used to drive the belt 4010 to rotate cyclically, the belt 4010 having a plurality of adsorption holes, the lower surface of the belt 4010 forming a sorting surface; and an adsorption structure 4013 having a plurality of vacuum chambers arranged independently in sequence and a plurality of ventilation channels communicating with each vacuum chamber. The ventilation holes are located on the side of the vacuum chamber facing the sorting surface. Four of the multiple vacuum chambers are respectively provided with the first collection structure 406, the second collection structure 407, the first feeding structure 408, and the second feeding structure 409. The vacuum breaking component 40134 is used to break the vacuum in the vacuum chamber. Each of the four vacuum chambers corresponding to the first collection structure 406, the second collection structure 407, the first feeding structure 408, and the second feeding structure 409 is provided with the vacuum breaking component 40134.

[0111] With the above configuration, each vacuum chamber can be connected to multiple adsorption holes at corresponding positions on the belt 4010 through multiple vent holes, connecting multiple vacuum chambers to a vacuum source. This creates a negative pressure on the sorting surface of the belt 4010, allowing multiple copper-lithium composite sheets 103 to be adsorbed. The belt 4010 is driven to rotate cyclically, moving the multiple copper-lithium composite sheets 103. The four vacuum chambers corresponding to the first collection structure 406, the second collection structure 407, the first feeding structure 408, and the second feeding structure 409 can be in a vacuum-breaking state through the vacuum breaking component 40134, allowing the multiple copper-lithium composite sheets 103 to be released at different positions and classified and placed in the corresponding first collection structure 406, second collection structure 407, first feeding structure 408, and second feeding structure 409.

[0112] Preferably, as shown in Figures 19 to 21, in an embodiment of the present invention, the sorting mechanism 405 further includes a tension roller 4012 located on one side of the belt 4010. The tension roller 4012 can be moved in the up-down direction in Figure 19 by a driving mechanism (such as an electric cylinder) to adjust the tension of the belt 4010.

[0113] As shown in Figures 22 to 25, in an embodiment of the present invention, the adsorption structure 4013 of the sorting mechanism 405 includes a shell with an opening and multiple partitions 40131 located inside the shell, dividing the interior of the shell into multiple independent vacuum chambers. Each vacuum chamber has a vacuum pipe 40132 connected to both sides. The vacuum pipe 40132 is connected to the shell. A cover plate 40133 covers the opening of the shell, and the surface of the cover plate has the aforementioned multiple ventilation holes. Vacuum breaking components 40134 are also connected to the vacuum chambers corresponding to the positions of the first collecting structure 406, the second collecting structure 407, the first discharging structure 408, and the second discharging structure 409.

[0114] Preferably, as shown in Figures 22 to 25, in an embodiment of the present invention, the vacuum breaking component 40134 is an air inlet pipe.

[0115] As shown in Figures 19, 21, and 26, in an embodiment of the present invention, the transfer assembly 40 further includes a cleaning mechanism 4014. The cleaning mechanism 4014 includes: a dust collection box, which includes a box body 40143 and a vacuum pipeline 40132. The box body 40143 has a dust collection chamber and an opening communicating with the dust collection chamber, and the vacuum pipeline 40132 communicates with the dust collection chamber; and a brush roller 40141, which is rotatably installed in the dust collection chamber, with a portion of the brush roller 40141 protruding from the box body 40143 and contacting the belt 4010. In this way, the belt can be brushed to remove dust.

[0116] Preferably, as shown in FIG21, in an embodiment of the present invention, the brush roller 40141 may be located on the side of the belt 4010 facing the drive roller 4011, or on the side of the belt 4010 away from the drive roller 4011.

[0117] Preferably, as shown in FIG21, in an embodiment of the present invention, the brush roller 40141 is driven to rotate by the second motor 40142, and the surface of the brush roller 40141 is in contact with the surface of the belt 4010.

[0118] It should be noted that, in the embodiments of the present invention, in the initial state, the vacuum chambers of the transfer mechanism 404 and the sorting mechanism 405 are always in a vacuum state. When the copper-lithium composite sheet 103 is transferred from the belt on the transfer mechanism 404 to the belt on the sorting mechanism 405, the defective products identified by the visual inspection mechanism 403 move to the corresponding first collection structure 406 and second collection structure 407. Compressed air is then injected into the corresponding independent vacuum chamber of the defective product to break the vacuum, and the defective product falls into the waste collection position due to its own gravity. Similarly, the qualified products identified by the visual inspection mechanism 403 move to the corresponding first feeding structure 408 and second feeding structure 409. Compressed air is then injected into the corresponding vacuum chamber of the qualified product to break the vacuum, and the qualified product falls into the first feeding structure 408 and second feeding structure 409 due to its own gravity.

[0119] It should be noted that the present invention has the following advantages:

[0120] First, it achieves automatic tape splicing function, eliminating the need for manual glue preparation and reducing the difficulty of operation.

[0121] Second, by arranging several lithium strips in a spatially staggered manner, it can be applied to lithium strips of different numbers and widths, taking into account different design processes, thereby improving the problem of poor compatibility with process changes.

[0122] 3. The laser alternating cutting is applicable to the copper tabs of A-cell and B-cell respectively. The sorting mechanism is equipped with corresponding waste rejection positions (first collection structure 406, second collection structure 407) and unloading positions (first unloading structure 408 and second unloading structure 409), so that a single machine can obtain different types of copper-lithium composite sheets at the same efficiency. This enables the rapid and synchronous manufacturing of different types of copper-lithium composite sheets, thus avoiding the problem of large space occupation and low space utilization caused by the dual-machine separate manufacturing mode.

[0123] Fourth, the gap between the first pressure roller 302 and the second pressure roller 303 can be automatically adjusted through the cooperation of the first inclined block 305 and the second inclined block 306, making the adjustment faster and more accurate, thus avoiding the problems of low efficiency and poor accuracy caused by manual adjustment.

[0124] Fifth, the elimination of the need for frequent waste removal and qualified product unloading by robotic arms not only makes the equipment more compact but also significantly improves efficiency.

[0125] It should be noted that, in the embodiments of the present invention, the main unwinding roller 201, the main take-up roller 202, the conveyor roller 2013, the spare unwinding roller 203, the spare take-up roller 205, the tape unwinding roller 2041, the composite roller 2012, the adjusting roller 301, the feed roller 401, the drive roller 4011, the tension roller 4012, and the brush roller 40141 are all rotatably arranged and can all be driven by a motor to achieve rotation.

[0126] It should be noted that, in the embodiments of the present invention, the downstream is located in the conveying direction of the material belts (copper belt 1031, lithium belt 1032, diaphragm belt 1033).

[0127] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: By setting a tape-connecting mechanism, when the main tape is gradually used up, the two adsorption components move towards each other simultaneously along the X direction until the main tape and the spare tape are clamped together; the main tape and the spare tape are cut off by a cutter, and then the upper adsorption station of the left adsorption component is in a vacuum state, the lower adsorption station of the right adsorption component is in a vacuum state, and the remaining adsorption station is in a vacuum-broken state. Then, the two adsorption components are moved away from each other synchronously. At this time, the end of the main tape and the beginning of the spare tape are detached because they have not been adsorbed; then, the two adsorption components move towards each other simultaneously again until the main tape and the spare tape are clamped together, so as to achieve the docking of the main tape and the spare tape. At the same time, both adsorption stations of the left adsorption component are in a vacuum state, and both adsorption stations of the right adsorption component are in a vacuum-broken state. The main material strip and the spare material strip are simultaneously adsorbed onto the adsorption component on the left. Then, the two adsorption components are moved away from each other synchronously to facilitate the bonding of one side of the main material strip and the spare material strip with adhesive tape. Then, the two adsorption components move towards each other synchronously again until the main material strip, the spare material strip, and the adhesive tape are clamped together. This puts the two adsorption positions of the adsorption component on the right into a vacuum state and the two adsorption positions of the adsorption component on the left into a vacuum-breaking state. Then, the two adsorption components are moved away from each other synchronously, and the main material strip and the spare material strip are no longer in contact with the adsorption component on the left. This allows the other side of the main material strip and the spare material strip to be connected with adhesive tape, thus achieving the splicing between the main material strip and the spare material strip. In this way, compared with the existing technology that uses manual alignment of the main material strip and the spare material strip, resulting in poor splicing accuracy, the present invention can improve the splicing accuracy by using a splicing mechanism to align the main material strip and the spare material strip.

[0128] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A system for preparing copper-lithium composite sheets, characterized in that, Includes at least one unwinding assembly (20), said unwinding assembly (20) comprising: The main unwinding mechanism includes a main unwinding roller (201), a main winding roller (202), and a conveying roller (2013) arranged sequentially along the Y direction; The tape receiving mechanism (204) is located between the main unwinding roller (201) and the main take-up roller (202), and the tape receiving mechanism (204) includes two adsorption members (2044) movably arranged along the X direction; Each of the adsorption components (2044) has two adsorption stations arranged sequentially in the Y direction. Each adsorption station has a vacuum state for adsorbing the material strip and a vacuum breaking state for releasing the material strip. The X direction is arranged at an angle to the Y direction.

2. The system for preparing copper-lithium composite sheets according to claim 1, characterized in that, The unwinding assembly (20) has a tape receiving channel extending along the Y direction; the unwinding assembly (20) also includes a backup unwinding mechanism. Along the X direction, the main unwinding mechanism and the backup unwinding mechanism are located on both sides of the tape receiving channel. The backup unwinding mechanism includes a backup unwinding roller (203) and a backup take-up roller (205) spaced apart along the Y direction. One of the two adsorption components (2044) is located between the main unwinding roll (201) and the main take-up roll (202), and the other of the two adsorption components (2044) is located between the spare unwinding roll (203) and the spare take-up roll (205).

3. The system for preparing copper-lithium composite sheets according to claim 2, characterized in that, The adsorption component (2044) is provided with a first chamber and a second chamber, which are spaced apart along the Y direction; The adsorption component (2044) has a plurality of first through holes (20441) and a plurality of second through holes (20442) on the side facing the receiving channel. The plurality of first through holes (20441) communicate with the first chamber, and the plurality of second through holes (20442) communicate with the second chamber.

4. The system for preparing copper-lithium composite sheets according to claim 3, characterized in that, One of the two adsorption components (2044) is provided with a strip cutting component (2046), which is located between the first chamber and the second chamber. The strip cutting component (2046) is movably arranged along the X direction so that it can extend into the tape receiving channel.

5. The system for preparing copper-lithium composite sheets according to any one of claims 2 to 4, characterized in that, The belt-connecting mechanism (204) further includes a belt-connecting member, which comprises: Tape unwinding roller (2041); First gripper (2042); The second gripper (2047) is arranged along the Y direction, wherein the main unwinding roller (201), the tape unwinding roller (2041), the first gripper (2042), the adsorption member (2044) and the second gripper (2047) are arranged in sequence. The second gripper (2047) is movably arranged along the Y direction and has a gripping position close to the first gripper (2042) and a pull-out position away from the first gripper (2042).

6. The system for preparing copper-lithium composite sheets according to claim 5, characterized in that, The tape receiving mechanism (204) includes two tape receiving components. Along the X direction, the two tape receiving components are located on both sides of the tape receiving channel, and the two tape receiving components are respectively arranged corresponding to the two adsorption components (2044).

7. The system for preparing copper-lithium composite sheets according to any one of claims 1 to 4, characterized in that, The system for preparing copper-lithium composite sheets further includes a composite component (30) and three unwinding components (20) arranged in parallel. The copper strip (1031), lithium strip (1032) and separator strip (1033) are unwound by the three unwinding components (20) and then enter the composite component (30) for composite to form a copper-lithium composite strip.

8. The system for preparing copper-lithium composite sheets according to claim 7, characterized in that, The composite component (30) includes: Composite roller (2012); The pressure roller mechanism includes a frame and a first pressure roller (302) and a second pressure roller (303) rotatably disposed on the frame. A roller pressing channel is provided between the first pressure roller (302) and the second pressure roller (303). The copper strip (1031), the lithium strip (1032) and the diaphragm strip (1033) are conveyed to the roller pressing channel via the composite roller (2012).

9. The system for preparing copper-lithium composite sheets according to claim 8, characterized in that, The first pressure roller (302) and / or the second pressure roller (303) are provided with an oil storage cavity and an oil inlet pipe (304) communicating with the oil storage cavity.

10. The system for preparing copper-lithium composite sheets according to claim 8, characterized in that, The second pressure roller (303) is movably disposed relative to the first pressure roller (302) so that the second pressure roller (303) can move closer to or further away from the first pressure roller (302).

11. The system for preparing copper-lithium composite sheets according to claim 8, characterized in that, An adjusting roller (301) is provided between the composite roller (2012) and the pressure roller mechanism, and the adjusting roller (301) is movably arranged along the Y direction; And / or, downstream of the pressure roller mechanism, there are a plurality of adjusting rollers (301) arranged in rows and columns, each of the adjusting rollers (301) being movably arranged along the X direction.

12. The system for preparing copper-lithium composite sheets according to claim 7, characterized in that, The system for preparing copper-lithium composite sheets further includes a cutting component (402) and a transfer component (40), which are located downstream of the composite component (30). The cutting component (402) is used to cut the copper-lithium composite strip into multiple copper-lithium composite sheets (103).

13. The system for preparing copper-lithium composite sheets according to claim 12, characterized in that, The transfer assembly (40) includes: The transfer mechanism (404) has a conveying surface for conveying the copper-lithium composite sheet (103); The visual inspection mechanism (403) has a detection end for detecting the size of the copper-lithium composite sheet (103), the detection end being disposed toward the conveying surface; The sorting mechanism (405) has a sorting surface capable of receiving the copper-lithium composite sheet (103) conveyed by the transfer mechanism (404); The receiving mechanism has a sorting surface facing it. The receiving mechanism includes a first collecting structure (406), a second collecting structure (407), a first discharging structure (408), and a second discharging structure (409) arranged in sequence. The sorting mechanism (405) is used to convey multiple copper-lithium composite sheets (103) to the first collecting structure (406), the second collecting structure (407), the first discharging structure (408), and the second discharging structure (409), respectively.

14. The system for preparing copper-lithium composite sheets according to claim 13, characterized in that, The sorting mechanism (405) is located above the receiving mechanism, and the sorting mechanism (405) includes: Multiple drive rollers (4011); A belt (4010) is wound around a plurality of drive rollers (4011), the plurality of drive rollers (4011) are used to drive the belt (4010) to rotate cyclically, the belt (4010) is provided with a plurality of suction holes, and the lower surface of the belt (4010) forms the sorting surface; The adsorption structure (4013) has a plurality of vacuum chambers arranged independently in sequence and a plurality of vent holes communicating with each vacuum chamber. The vent holes are located on the side of the vacuum chamber facing the sorting surface. Four of the plurality of vacuum chambers are respectively arranged corresponding to the first collection structure (406), the second collection structure (407), the first feeding structure (408), and the second feeding structure (409). A vacuum breaking component (40134) is used to break the vacuum in the vacuum chamber. The vacuum breaking component (40134) is provided on each of the four vacuum chambers that are respectively arranged corresponding to the first collecting structure (406), the second collecting structure (407), the first feeding structure (408) and the second feeding structure (409).

15. The system for preparing copper-lithium composite sheets according to claim 14, characterized in that, The transfer assembly (40) further includes a cleaning mechanism (4014), the cleaning mechanism (4014) comprising: A dust collection box, comprising a box body (40143) and a vacuum line (40132), wherein the box body (40143) has a dust collection chamber and an opening communicating with the dust collection chamber, and the vacuum line (40132) is communicating with the dust collection chamber; A brush roller (40141) is rotatably mounted in the dust collection chamber, and part of the brush roller (40141) protrudes from the box body (40143) and contacts the belt (4010).

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