Composite laser cutting and stacking all-in-one machine

Abstract

The invention relates to a composite laser cutting and stacking all-in-one machine, and relates to the technical field of battery preparation. The composite laser cutting and stacking all-in-one machine comprises a negative electrode stock line mechanism, a double-unwinding diaphragm stock line mechanism, a negative electrode rolling assembly, a positive electrode stock line mechanism, a positive electrode compounding assembly, a detection mechanism, a double-sided rubberizing mechanism, a tailing collecting mechanism, a double-station stacking table mechanism and an off-line patch patching mechanism. Then, the double-sided rubberizing mechanism is used for realizing rubberizing to form an anti-sticking glue layer, and the tailing collecting mechanism is used for collecting the diaphragm tailings at the adhesive tape connecting position, so that the influence of the tape connecting position on the battery cell is avoided, the whole battery cell is prevented from being scrapped, and the material waste is avoided. Due to the arrangement of the anti-adhesive layer, the offline patch mechanism can be used for reunfolding and patch the NG battery cells formed after lamination, so that online detection and offline patch can be realized, defective products can be timely patch, the yield of the battery cells is improved, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery preparation, and in particular to a composite laser cutting and stacking machine. Background Art

[0002] In previous projects, the diaphragm unwinding adopts a single unwinding mode. When the diaphragm needs to be replaced, the machine needs to be stopped and the diaphragm roll needs to be replaced manually. When the diaphragm is spliced, there will be tape connection, which will cause the entire cell at the splicing position to be scrapped, resulting in the waste of qualified pole pieces and diaphragms, and increasing production costs.

[0003] The composite material strip inspection is to use the line scanning component in front of the electrode cutter to check for defects such as damage, stains or local dimensional deviation on the electrodes in the incoming materials. In addition, the electrodes may often be scratched or damaged during the tape conveying process. However, the line scanning camera is expensive, and the line scanning for cutting the electrode ears is performed in the vertical direction, so the results are not very accurate. Moreover, it is impossible to detect various defective problems on the composite material strip, which reduces the yield of the produced battery cells. Defective products have to be manually picked out, reducing efficiency. Summary of the invention

[0004] The purpose of this application is to provide a composite laser cutting and stacking machine, which can provide continuous diaphragms and collect the diaphragm tails to avoid the entire battery cell at the connection position being scrapped and material waste. At the same time, it can realize online detection and offline patching, patch defective products in time, improve the battery cell yield, and improve production efficiency.

[0005] In order to achieve the above objectives, the embodiment of the present invention adopts the following scheme:

[0006] In a first aspect, the present invention provides a composite laser cutting and laminating machine, comprising:

[0007] A negative electrode material line mechanism, used for providing a negative electrode material strip and cutting the negative electrode material strip into negative electrode unit sheets;

[0008] A double unwinding diaphragm material line mechanism is used to provide continuous diaphragms, and the connection of the diaphragms is provided with a connecting tape with a color code;

[0009] A negative electrode rolling assembly is arranged at the discharge side of the negative electrode material line mechanism and the diaphragm material line mechanism, and is used to roll and composite the diaphragm and the negative electrode unit sheet;

[0010] A positive electrode material line mechanism, used for providing positive electrode material strips and cutting the positive electrode material strips into positive electrode unit sheets;

[0011] A positive electrode composite assembly is arranged at the discharge side of the positive electrode material line mechanism and the negative electrode rolling assembly, and is used to perform a thermal composite treatment on the positive electrode unit sheet, the separator and the negative electrode unit sheet to form a composite sheet;

[0012] A detection mechanism, arranged at the discharge side of the positive electrode composite assembly, for detecting the composite sheet;

[0013] A double-sided gluing mechanism, arranged on the discharging side of the detection mechanism, is used to glue the surfaces of both sides of the defective electrode portion in the composite sheet and form an anti-adhesive layer;

[0014] A tailings collecting mechanism, arranged at the discharging side of the double-sided gluing mechanism, for collecting the diaphragm tailings at the connecting tape on the composite sheet;

[0015] A double-station stacking mechanism, arranged at the discharge side of the tail material collecting mechanism, for stacking the composite sheets to form a battery core;

[0016] The off-line patching mechanism is arranged on the discharge side of the double-station stacking mechanism and is used for patching the NG battery cells.

[0017] In an optional embodiment, the tail material collection mechanism includes a dual-drive assembly, a first hot electrode cutter, a second hot electrode cutter and a tail material collection clamp, the dual-drive assembly has a drive channel for the composite sheet to pass through, the first hot electrode cutter, the second hot electrode cutter and the tail material collection clamp are all arranged in the dual-drive assembly, the first hot electrode cutter and the second hot electrode cutter are arranged at intervals on one side of the drive channel, and are used to cut off the diaphragm tail material at the connecting tape on the composite sheet, the tail material collection clamp is arranged between the first hot electrode cutter and the second hot electrode cutter, and can extend into and out of the drive channel, and is used to collect the diaphragm tail material.

[0018] In an optional embodiment, the dual-drive assembly includes a dual-drive housing, a color mark detector, a first drive roller group and a second drive roller group, the first drive roller group and the second drive roller group are arranged at intervals in the dual-drive housing to form the drive channel, the color mark detector is arranged on the feeding side of the dual-drive housing to detect the color mark on the composite sheet, and the tail material collection clamp is arranged between the first drive roller group and the second drive roller group.

[0019] In an optional embodiment, the offline patching mechanism includes a unit cell material bin, an NG battery cell material box, a battery cell patching assembly, a battery cell hot pressing assembly and a gluing platform which are arranged in sequence, the unit cell material bin stores unit cells for patching, the NG battery cell material box is used to store NG battery cells stacked by the double-station stacking mechanism, the battery cell patching assembly is used to unfold the NG battery cells and perform patching, the battery cell hot pressing assembly is used to perform hot pressing on the NG battery cells after patching, and the gluing platform is used to perform a gluing process on the NG battery cells after hot pressing to form qualified battery cells.

[0020] In an optional embodiment, the offline patching mechanism also includes a transplanting track, a transplanting robot, a hot pressing loading robot and a hot pressing unloading robot. The transplanting robot can be slidably arranged on the transplanting track and can move between the unit cell material bin, the NG battery cell material box and the battery cell patch assembly to realize material transfer. The hot pressing unloading robot and the hot pressing loading robot are both arranged on the transplanting track, and the hot pressing loading robot is arranged between the battery cell patch assembly and the battery cell hot pressing assembly, and is used to deliver the NG battery cell with patch completed to the battery cell hot pressing assembly. The hot pressing unloading robot is arranged between the battery cell patch assembly and the glue pasting platform, and is used to deliver the NG battery cell with hot pressing completed to the glue pasting platform.

[0021] In an optional embodiment, the double unwinding diaphragm material line mechanism includes a first diaphragm unwinding roller, a second diaphragm unwinding roller, an automatic diaphragm splicing platform, a diaphragm pressing platform and a glue preparation platform, the automatic diaphragm splicing platform is arranged between the first diaphragm unwinding roller and the second diaphragm unwinding roller, the diaphragm pressing platform is arranged on the automatic diaphragm splicing platform, and is used to press the connection of the diaphragm, and the glue preparation platform is provided with a tape rotating cylinder, and the tape rotating cylinder is used to bond the connecting tape to the connection of the diaphragm.

[0022] In an optional embodiment, the detection mechanism includes a composite sheet detection component and a short circuit test component. The composite sheet detection component is arranged on the discharge side of the positive electrode composite component for detecting the lug height of the composite sheet. The short circuit test component is arranged on the side of the composite sheet detection component away from the positive electrode composite component for performing a short circuit test on the positive electrode unit and the negative electrode unit on the composite sheet.

[0023] In an optional embodiment, the short-circuit test assembly includes a linear motor and a four-station short-circuit detection block, and the linear motor is transmission-connected to the four-station short-circuit detection block for driving the four-station short-circuit detection block to move synchronously with the composite sheet and press it on the pole ear of the composite sheet to perform a short-circuit test.

[0024] In an optional embodiment, the short circuit test assembly includes a synchronous wheel, a synchronous belt and a plurality of short circuit detection blocks, the synchronous belt is wound around the synchronous wheel, and the plurality of short circuit detection blocks are arranged on the synchronous belt. The synchronous wheel is used to drive the synchronous belt to move so that one side of the synchronous belt moves synchronously with the composite sheet, and the short circuit detection block is used to contact the pole ear on the composite sheet and perform a short circuit test.

[0025] In an optional embodiment, the composite sheet detection component includes a front camera, a rear camera, a front light source, a rear ring light source, a front ring light source and a rear light source, the front camera is arranged at an interval on the front side of the composite sheet, the front ring light source is arranged between the front camera and the composite sheet, the rear light source is arranged on a side of the composite sheet away from the front ring light source, the rear camera is arranged on the rear side of the composite sheet and is staggered with the front camera, the rear ring light source is arranged between the composite sheet and the rear camera, and the front light source is arranged on a side of the composite sheet away from the rear ring light source.

[0026] Through the above technical scheme, the embodiment of the present invention utilizes the negative electrode material line mechanism and the positive electrode material line mechanism to realize the conveying of the negative electrode unit sheet and the positive electrode unit sheet respectively, and utilizes the double unwinding diaphragm material line mechanism to provide a continuous diaphragm, and the connection of the diaphragm is affixed with a connection tape with a color code, the negative electrode rolling assembly can roll and compound the diaphragm and the negative electrode unit sheet, and the positive electrode composite assembly can thermally compound the positive electrode unit sheet with the rolled and compounded diaphragm and the negative electrode unit sheet to form a composite sheet. The composite sheet is detected by the detection mechanism to identify the NG sheet, and then the double-sided gluing mechanism is used to implement the gluing to form an anti-adhesive layer, and the tail material collection mechanism collects the diaphragm tail material at the connection tape, so as to avoid the connection position affecting the battery cell, avoid the entire battery cell being scrapped, and avoid material waste. And because the anti-adhesive layer is provided, the offline patching mechanism can re-expand and patch the NG battery cell formed after lamination, and can realize online detection and offline patching, patch the defective products in time, improve the battery cell yield, and improve production efficiency.

[0027] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of the composite laser cutting and laminating machine provided in this application;

[0030] Figure 2 A schematic diagram of the structure of another composite laser cutting and laminating machine provided in this application;

[0031] Figure 3 for Figure 1 Structural schematic diagram of the tailing material collection mechanism;

[0032] Figure 4 for Figure 1 Schematic diagram of the structure of the medium double unwinding diaphragm material line mechanism;

[0033] Figure 5 for Figure 1 Structural schematic diagram of the offline patching mechanism;

[0034] Figure 6 for Figure 1 Schematic diagram of the structure of the medium and short circuit test component;

[0035] Figure 7 for Figure 1 A schematic diagram of the structure of another short-circuit test component;

[0036] Figure 8 for Figure 1 Schematic diagram of the structure of the composite sheet detection component.

[0037] icon:

[0038] 100-composite laser cutting and stacking machine; 110-negative electrode material line mechanism; 111-negative electrode double unwinding roller group; 112-first negative electrode tension swing rod; 113-embossing roller; 114-negative electrode sheet line scanning assembly; 115-negative electrode laser cutting ear assembly; 116-negative electrode driving roller group; 117-second negative electrode tension swing rod; 118-negative electrode laser cutting assembly; 119-negative electrode feeding and rejecting assembly; 120-double unwinding diaphragm material line mechanism; 121-first diaphragm unwinding roller; 122-second diaphragm unwinding roller; 123-diaphragm automatic Belt connection platform; 124-diaphragm pressing platform; 125-glue preparation platform; 130-negative electrode rolling assembly; 131-negative electrode rolling roller; 132-diaphragm oven; 140-positive electrode material line mechanism; 141-positive electrode double unwinding roller group; 142-positive electrode laser cutting ear assembly; 143-V-angle punching assembly; 144-positive electrode driving assembly; 145-cache assembly; 146-positive electrode tension swing rod; 147-positive electrode cutting assembly; 148-positive electrode accelerated rejection assembly; 150-positive electrode composite assembly; 160-detection mechanism; 161-composite Assembly detection assembly; 1611-front camera; 1612-rear camera; 1613-front light source; 1614-rear ring light source; 1615-front ring light source; 1616-rear light source; 162-short circuit test assembly; 163-linear motor; 164-four-station short circuit detection block; 165-synchronous wheel; 166-synchronous belt; 167-short circuit detection block; 170-double-sided gluing mechanism; 180-tail material collection mechanism; 181-dual drive assembly; 182-first hot plate cutter; 183-second hot plate Pole cutter; 184-tail material collection clamp; 185-dual drive box; 186-color code detector; 187-first drive roller group; 188-second drive roller group; 190-double-station stacking mechanism; 200-offline patching mechanism; 210-unit piece bin; 220-NG battery cell box; 230-battery cell patch assembly; 240-battery cell hot pressing assembly; 250-glue sticking platform; 260-transplanting track; 270-transplanting manipulator; 280-hot pressing loading manipulator; 290-hot pressing unloading manipulator; 300-pole ear. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0043] The embodiment of the present invention provides a composite laser cutting and stacking machine 100, which can provide continuous diaphragms and collect diaphragm tailings to avoid the entire battery cell at the connection position being scrapped and material waste. At the same time, it can realize online detection and offline patching, patch defective products in time, improve the battery cell yield, and improve production efficiency.

[0044] See also Figure 1 and Figure 2The composite laser cutting and stacking machine 100 provided in an embodiment of the present invention includes a negative electrode material line mechanism 110, a double unwinding diaphragm material line mechanism 120, a negative electrode rolling assembly 130, a positive electrode material line mechanism 140, a positive electrode composite assembly 150, a detection mechanism 160, a double-sided gluing mechanism 170, a tail material collection mechanism 180, a double-station stacking mechanism 190 and an offline patching mechanism 200. The negative electrode material line mechanism 110 is used to provide a negative electrode material strip and cut the negative electrode material strip into negative electrode unit sheets; the double unwinding diaphragm material line mechanism 120 is used to provide a continuous diaphragm, and a connecting tape with a color code is provided at the connection of the diaphragm; the negative electrode rolling assembly 130 is arranged on the discharge side of the negative electrode material line mechanism 110 and the diaphragm material line mechanism, and is used to roll and composite the diaphragm and the negative electrode unit sheet; the positive electrode material line mechanism 140 is used to provide a positive electrode material strip and cut the positive electrode material strip into a positive electrode unit The positive electrode composite assembly 150 is arranged on the discharge side of the positive electrode material line mechanism 140 and the negative electrode rolling assembly 130, and is used to perform thermal composite treatment on the positive electrode unit sheet, the diaphragm and the negative electrode unit sheet to form a composite sheet; the detection mechanism 160 is arranged on the discharge side of the positive electrode composite assembly 150, and is used to detect the composite sheet; the double-sided gluing mechanism 170 is arranged on the discharge side of the detection mechanism 160, and is used to glue the two side surfaces of the defective electrode sheet part in the composite sheet and form an anti-sticking layer; the tail material collection mechanism 180 is arranged on the discharge side of the double-sided gluing mechanism, and is used to collect the diaphragm tail material at the connecting tape on the composite sheet; the double-station stacking mechanism 190 is arranged on the discharge side of the tail material collection mechanism 180, and is used to stack the composite sheets to form a battery cell; the offline patching mechanism 200 is arranged on the discharge side of the double-station stacking mechanism 190, and is used to patch the NG battery cell.

[0045] It should be noted that the double-sided gluing mechanism 170 here applies glue to the surfaces of both sides of the detected defective electrode area, and can be glued on the diaphragm and the positive electrode unit sheet on both sides. For example, when the composite sheet is detected to be defective, glue can be applied to the defective positive electrode unit sheet on the front and the diaphragm surface on the back.

[0046] The negative electrode material line mechanism 110 includes a negative electrode double unwinding roller group 111, a first negative electrode tension swing rod 112, an embossing roller 113, a negative electrode sheet line scanning assembly 114, a negative electrode laser cutting ear assembly 115, a negative electrode driving roller group 116, a second negative electrode tension swing rod 117, a negative electrode laser cutting assembly 118 and a negative electrode feeding and rejecting assembly 119, which are sequentially arranged along the moving direction of the negative electrode material strip. The negative electrode double unwinding roller group 111 is used to realize the unwinding of the negative electrode material strip, and the first negative electrode The tension swing rod 112 and the second negative electrode tension swing rod 117 are used to adjust the tension of the material strip, the embossing roller 113 is used to emboss the position of the pole tab 300, and add reinforcing ribs to the pole tab 300. After the vacuum belt and the negative pressure vacuum roller adsorb the negative electrode material strip, the negative electrode laser cutting pole tab assembly 115 performs laser cutting of the pole tab 300. Since the laser cutting of the pole tab 300 requires calculation of the formation of the negative electrode material strip, an encoding roller can be installed before the laser cutting of the pole tab 300. The negative electrode driving roller group 116 is used to drive the negative electrode material strip to move, and the negative electrode material rejection assembly 119 can reject unqualified negative electrode unit sheets.

[0047] The negative electrode laser cutting assembly 118 is used to cut the negative electrode material strip to form a negative electrode unit sheet so that the negative electrode unit sheet and the separator can be compounded. During laser cutting, the negative electrode material strip is in high-speed motion, that is, the laser needs to follow the material strip to ensure that the cut is flush. The follow-up cutting angle is calculated by motion planning, and the laser beam follow-up cutting angle should be between 50° and 80°.

[0048] It should be noted that, in this embodiment, the negative electrode material line mechanism 110 can be a single-path laser cutting negative electrode solution, such as Figure 1 , or it can be a dual-path laser cutting cathode solution, such as Figure 2 When a single-path laser cutting negative electrode solution is adopted, the laser cutting negative electrode mechanism exists before the negative electrode feeding and rejection, and the speed of the negative electrode unit sheet cut by the laser entering the negative electrode feeding and rejection component 119 is the same as the diaphragm belt speed. When dual-path laser cutting is adopted, the speed of the negative electrode unit sheet is half of the diaphragm speed, and it is necessary to add a pair of acceleration rollers before the feeding and rejection component to ensure that when the material belt enters the negative electrode feeding and rejection acceleration roller, the speed of the negative electrode sheet is accelerated to twice the original speed before entering the negative electrode rolling component 130. The angle between the two negative electrode material belts should be maintained between 20° and 60°. Whether single-path laser cutting or dual-path laser cutting is adopted, it is necessary to ensure that the negative electrode unit sheet and the diaphragm can enter the negative electrode rolling component 130 horizontally to complete the rolling and compounding of the negative electrode unit sheet and the diaphragm by the negative electrode rolling component 130. For the bad negative electrode sheets after cutting, the bad sheets can be rejected before entering the negative electrode rolling component 130 after feedback from the sensor. In order to solve the dust and waste problems generated by laser cutting, a zoned dust removal method will be adopted to prevent the generated dust from circulating in the entire machine space and increasing the risk of battery cell short circuit.

[0049] The negative electrode sheet line scanning component 114 is arranged before the negative electrode laser cutting lug component 115, and is used to detect defects in the incoming materials before entering the laser cutting lug 300. When the laser cutting lug 300 is performed, the lug 300 of the defective section of the incoming materials will be skipped to ensure that each layer of the lug 300 of the battery cell has a corresponding position, avoiding defects detected by line scanning after cutting the lug 300. The negative electrode rejection component will reject the bad sheet, and the battery cell will be missing sheets. If the bad sheet is not rejected, the entire battery cell will be scrapped.

[0050] The positive electrode material line mechanism 140 includes a positive electrode double unwinding roller group 141, a positive electrode laser cutting ear assembly 142, a V-angle punching assembly 143, a positive electrode driving assembly 144, a cache assembly 145, a positive electrode tension swing rod 146, a positive electrode cutting assembly 147 and a positive electrode accelerated waste rejection assembly 148, which are arranged in sequence along the direction of the positive electrode material strip. The positive electrode double unwinding roller group 141 is used to realize the unwinding of the positive electrode material strip, the positive electrode laser cutting ear assembly 142 is used to cut the ear 300 of the positive electrode material strip, and in order to meet the process requirements, a V-angle punching assembly 143 is also added. The positive electrode driving assembly 144 is used to drive the positive electrode material strip to move, and the cache assembly 145 can cache the positive electrode material strip, the positive electrode tension swing rod 146 can adjust the tension of the positive electrode material strip, the positive electrode cutting assembly 147 can cut the positive electrode material strip to form a positive electrode unit sheet, and the positive electrode accelerated waste rejection assembly 148 can realize the acceleration and rejection of the positive electrode unit sheet.

[0051] Furthermore, in this embodiment, the positive electrode material line mechanism 140 can adopt a dual-path solution, and the upper and lower positive electrode material lines also incorporate the process of cutting the pole ear 300, so it is necessary to add components such as the embossing roller 113, the encoding roller, and the laser cutting of the pole ear 300. Hardware cutters are used for punching on both the pole ear 300 side and the non-pole ear 300 side of the positive electrode material strip. The hardware V-angle knife die and the cutting knife are driven by a servo motor and a cam to realize the opening and closing of the mold and complete the cutting action. The punching tool should meet the radius R1 of the four corners of the knife head, and the length and width of the incision should be 1mm.

[0052] It should be noted that the positive electrode strip is still cut by a metal cutter to complete the slicing of the positive electrode strip, which requires the control of the slicing accuracy and the width of the strip; the positive electrode unit sheet is fed at a high speed and stably, and the speed of the cutter feeding the sheet is half of the diaphragm tape speed; the dust generated by the cutter cutting can be collected and processed, and foreign matter on the electrode sheet can be cleaned. When the cutter feeds the sheet into the acceleration roller, the electrode sheet begins to accelerate, and after acceleration, the speed of the electrode sheet is the same as the speed of the diaphragm. When the electrode sheet is abnormal, it can be detected by the positive electrode alignment station, the waste positive electrode sheet can be removed, and the removed bad sheet can be accelerated by the cutter and the acceleration roller.

[0053] In this embodiment, the negative electrode rolling assembly 130 includes two negative electrode rolling rollers 131 and a diaphragm oven 132. The negative electrode rolling rollers 131 can realize the rolling and compounding of the negative electrode unit sheet and the diaphragm, and the diaphragm oven 132 can bake the rolled negative electrode unit sheet and the diaphragm. The positive electrode composite assembly 150 includes two positive electrode composite rolling rollers, which can thermally composite the composite negative electrode unit sheet and the diaphragm as well as the positive electrode unit sheet. After the composite negative electrode unit sheet and the diaphragm are heated by the diaphragm oven 132, they enter the positive electrode acceleration roller and the upper and lower positive electrode unit sheets that are alternately input are thermally composited under the positive electrode rolling roller to generate a composite sheet.

[0054] See also Figure 3 In this embodiment, the tail material collection mechanism 180 includes a dual-drive component 181, a first hot electrode cutter 182, a second hot electrode cutter 183 and a tail material collection clamp 184. The dual-drive component 181 has a driving channel for the composite sheet to pass through. The first hot electrode cutter 182, the second hot electrode cutter 183 and the tail material collection clamp 184 are all arranged in the dual-drive component 181. The first hot electrode cutter 182 and the second hot electrode cutter 183 are arranged at intervals on one side of the driving channel to cut off the diaphragm tail material at the connecting tape on the composite sheet. The tail material collection clamp 184 is arranged between the first hot electrode cutter 182 and the second hot electrode cutter 183, and can extend into and out of the driving channel to collect the diaphragm tail material.

[0055] Furthermore, the dual-drive assembly 181 includes a dual-drive housing 185, a color mark detector 186, a first drive roller group 187 and a second drive roller group 188. The first drive roller group 187 and the second drive roller group 188 are arranged at intervals in the dual-drive housing 185 to form a drive channel. The color mark detector 186 is arranged on the feeding side of the dual-drive housing 185 to detect the color mark on the composite sheet. The tail material collecting jaw 184 is arranged between the first drive roller group 187 and the second drive roller group 188.

[0056] See also Figure 4 The double unwinding diaphragm material line mechanism 120 includes a first diaphragm unwinding roller 121, a second diaphragm unwinding roller 122, a diaphragm automatic tape splicing platform 123, a diaphragm pressing platform 124 and a glue preparation platform 125. The diaphragm automatic tape splicing platform 123 is arranged between the first diaphragm unwinding roller 121 and the second diaphragm unwinding roller 122. The diaphragm pressing platform 124 is arranged on the diaphragm automatic tape splicing platform 123 and is used to press the connection of the diaphragm. The glue preparation platform 125 is provided with a tape rotating cylinder, and the tape rotating cylinder is used to bond the connecting tape to the connection of the diaphragm.

[0057] The diaphragm double unwinding method is adopted and equipped with an automatic diaphragm rewinding mechanism. The unwinding and splicing modes of the same electrode are the same. Two rolls of diaphragm material can be placed in the unwinding area. The automatic splicing method is adopted when the diaphragm is rewound. The diaphragm to be connected is fixed by a glue sticking suction cup, the old diaphragm material tape is cut off, and then the rotary cylinder is used for glue sticking to complete the automatic rewinding and splicing action. There will be a connecting tape at the connection of the diaphragm, and the tail material collection clamp 184 in the subsequent tail material collection mechanism 180 will extend from behind the large plate, clamp the tape with the splicing tape to handle the tail material of this section of diaphragm, and reduce the time consumed by loading and unloading. For the tape left at the diaphragm rewinding and splicing, the two layers of diaphragm can not cover the negative electrode unit sheet, and the outer side of the diaphragm on both sides does not adhere to the positive electrode unit sheet. At the tail material collection mechanism 180, the tail material of this section of diaphragm is recovered by rotating the clamp and cutting with a tool, and the front and rear sections of the composite sheet are adhered to the diaphragm, so as to avoid the entire scrapping of the battery cell at the splicing position and avoid material waste.

[0058] It should be noted that the tail material collecting jaw 184, the first hot electrode plate cutter 182 and the second hot electrode plate cutter 183 are all located inside the dual-drive box 185. When the color code detector 186 detects the connecting tape at the diaphragm joint, the tail material collecting jaw 184 extends, and the belt pressing platform below the jaw presses the composite material tape, and the second hot electrode plate cutter 183 located below extends and cuts off the composite sheet. Driven by the motor, the tail material collecting jaw 184 starts to rotate, and the composite sheet to be removed is wound and removed. The belt pressing platform above the jaw presses the composite sheet, and the first hot electrode plate cutter 182 located above extends and cuts off the composite sheet. At this time, the tail material collecting jaw 184 retreats to the back side of the large plate to dump the material, and at this time the dual-drive component 181 starts to drive the composite sheet above, and drives the composite sheet into the double-station stacking mechanism 190 for stacking to form a battery cell.

[0059] In this embodiment, the negative electrode unit sheet, the diaphragm, and the positive electrode unit sheet are rolled by the positive electrode rolling roller to form a composite sheet. After being inspected by the inspection mechanism 160, the defective sheets detected need to be removed. In order to avoid the bad sheets sticking to the diaphragm when the battery cell is hot-pressed on the hot pressing table, making it difficult to remove the electrode sheets, it is necessary to apply glue to the front and back sides (A and B sides) of the diaphragm to ensure that the electrode sheets and the diaphragm are easy to peel off after the battery cell enters the hot pressing, and to facilitate semi-automatic patching, thereby improving the qualified rate of the battery cell and improving production efficiency.

[0060] See also Figure 5In this embodiment, the offline patching mechanism 200 includes a unit cell bin 210, an NG cell box 220, a cell patching assembly 230, a cell hot pressing assembly 240 and a gluing platform 250 which are arranged in sequence. The unit cell bin 210 stores unit cells for patching, the NG cell box 220 is used to store NG cells stacked by the double-station stacking mechanism 190, the cell patching assembly 230 is used to unfold the NG cells and perform patching, the cell hot pressing assembly 240 is used to perform hot pressing on the NG cells after patching, and the gluing platform 250 is used to perform a gluing process on the NG cells after hot pressing to form qualified cells. Specifically, after the composite sheet line scanning, unit cell short circuit, and tab 300 damage detection and other mechanism detections, the AB surface of the diaphragm is glued, and after the stacking and hot pressing, the unqualified cells are judged to be NG and are placed on the NG cell placement platform. After transportation, the NG battery cell is placed on the NG battery cell material box 220 of the offline patch mechanism 200. The battery cell patch assembly 230 has three alignment platforms, which will remove the tapes on the A and B sides of the diaphragm and unfold the battery cell. The three alignment platforms are normal sheets, bad sheets, and normal sheets in order. The middle alignment platform uses two hot diaphragm cutters to cut the diaphragm, and then remove the bad sheets with a suction disk. In the case of bad sheets, there will be three electrode replacement platforms, which are used to replace the upper positive electrode sheet + negative electrode sheet, negative electrode sheet + lower positive electrode sheet, and negative electrode sheet (tail sheet). Then, 8 CCD cameras are used to detect and take pictures to locate the two corners of the left large blank space of the first alignment platform, the four corners of the large blank space of the second alignment platform, and the two corners of the right large blank space of the third alignment platform. After positioning by the visual camera, the alignment platform is adjusted by CCD positioning feedback. After positioning, the electrode sheet to be replaced is sucked by the suction disk for alignment and pasting. At this point, the work of the offline patching mechanism 200 is completed. When multiple pole pieces of the same battery cell need to be replaced, the above steps can be repeated. The patched battery cell undergoes heat pressing, short circuit testing and glue sticking processes to form a new qualified battery cell.

[0061] Furthermore, the offline patching mechanism 200 also includes a transplanting track 260, a transplanting robot 270, a hot pressing loading robot 280 and a hot pressing unloading robot 290. The transplanting robot 270 can be slidably arranged on the transplanting track 260, and can move between the unit cell bin 210, the NG battery cell box 220 and the battery cell patch assembly 230 to realize material transfer. The hot pressing unloading robot 290 and the hot pressing loading robot 280 are both arranged on the transplanting track 260, and the hot pressing loading robot 280 is arranged between the battery cell patch assembly 230 and the battery cell hot pressing assembly 240, and is used to deliver the NG battery cell with patching completed to the battery cell hot pressing assembly 240. The hot pressing unloading robot 290 is arranged between the battery cell patch assembly 230 and the gluing platform 250, and is used to deliver the NG battery cell with hot pressing completed to the gluing platform 250.

[0062] See also Figure 1 In this embodiment, the detection mechanism 160 includes a composite sheet detection component 161 and a short-circuit test component 162. The composite sheet detection component 161 is arranged on the discharge side of the positive electrode composite component 150, and is used to detect the height of the tab 300 of the composite sheet. The short-circuit test component 162 is arranged on the side of the composite sheet detection component 161 away from the positive electrode composite component 150, and is used to perform a short-circuit test on the positive electrode unit and the negative electrode unit on the composite sheet.

[0063] See also Figure 6 The short-circuit test assembly 162 includes a linear motor 163 and a four-station short-circuit detection pressing block 164. The linear motor 163 is connected to the four-station short-circuit detection pressing block 164 in transmission, and is used to drive the four-station short-circuit detection pressing block 164 to move synchronously with the composite sheet, and press it on the pole ear 300 of the composite sheet to perform a short-circuit test. After the composite sheet detection assembly 161 performs a height detection of the pole ear 300 on the pole piece of the composite sheet, a short-circuit test is performed on the pole piece, that is, the linear motor 163 is used to accelerate during the movement of the material strip, and the upper and lower short-circuit test plates clamp the positive and negative pole pieces, and the composite material strip is short-circuited. The test method adopts chase clamping and can simultaneously detect multiple pairs of unit pieces online. It can use the four-station chase clamping detection of the linear motor 163, and complete the detection of the pole piece through the acceleration and deceleration of the linear motor 163.

[0064] See also Figure 7 In other preferred embodiments of the present invention, the short circuit test assembly 162 includes a synchronous wheel 165, a synchronous belt 166 and a plurality of short circuit detection blocks 167. The synchronous belt 166 is wound around the synchronous wheel 165, and a plurality of short circuit detection blocks 167 are arranged on the synchronous belt 166. The synchronous wheel 165 is used to drive the synchronous belt 166 to move so that one side of the synchronous belt 166 moves synchronously with the composite sheet, and the short circuit detection block 167 is used to contact the pole ear 300 on the composite sheet and perform a short circuit test. Specifically, the belt synchronous wheel 165 mechanism is used for detection, and there are multiple detection stations on the belt, and a detection belt line cooperates with a support belt line to perform short circuit detection on the pole sheet.

[0065] See also Figure 8In this embodiment, the composite sheet detection component 161 includes a front camera 1611, a back camera 1612, a front light source 1613, a back annular light source 1614, a front annular light source 1615 and a back light source 1616. The front camera 1611 is arranged at an interval on the front side of the composite sheet, the front annular light source 1615 is arranged between the front camera 1611 and the composite sheet, the back light source 1616 is arranged on the side of the composite sheet away from the front annular light source 1615, the back camera 1612 is arranged on the back of the composite sheet and is staggered with the front camera 1611, the back annular light source 1614 is arranged between the composite sheet and the back camera 1612, and the front light source 1613 is arranged on the side of the composite sheet away from the back annular light source 1614.

[0066] The composite sheet tension system consists of a tension swing mechanism, a tension drive mechanism, a tension detection mechanism 160, and a composite sheet roller. After the positive electrode composite rolling roller, there are two sets of tension swing mechanisms, and there are tension drive components and tension detection components between the two sets of tension swing mechanisms. The tension of the first set of tension swing mechanisms close to the composite rolling roller is 10% to 20% greater than that of the second set. The tension drive component between the two sets of tension swing mechanisms is used to cut off the tension, that is, to provide tension for the composite sheet while solving the problems of material strip deviation and a small amount of material strip buffering. Unlike the composite sheet tension system, there are also tension swing assemblies on the pole sheet material strip and the diaphragm material strip, but compared with the composite sheet tension swing, although both provide tension and solve the problem of material strip deviation, the tension swing assemblies on the pole sheet material strip and the diaphragm material strip no longer provide a buffering function.

[0067] Before the composite sheet enters the double-station stacking mechanism 190, it needs to pass through the dual-drive component 181. The dual-drive component 181 is required to have the composite sheet driving function, and cooperate with the diaphragm tracking cutting component and the double-station stacking mechanism 190 to realize the composite sheet driving and conveying functions. The stacking requires the functions of first sheet correction, alignment detection, pole piece coating detection, pole piece smoothing, and compatible swing stacking. The alignment accuracy of adjacent pole pieces is required to be ≤±0.3mm, and the overall alignment accuracy of the battery cell is ≤±0.4mm.

[0068] In this embodiment, the double-station stacking mechanism 190 can meet the functions of first sheet correction, alignment detection, pole sheet covering detection, pole sheet smoothing, compatible swing stacking, etc. Specifically, when the stacking platform falls, the baffle of the stacking platform will be driven by a motor to follow the position of the composite sheet falling, so as to avoid the edge of the composite sheet hitting the baffle and causing damage when falling at high speed.

[0069] The embodiment of the present invention adds embossing rollers 113, laser cutting of pole ears 300, laser cutting and other components to the original hot composite lamination machine, which is more efficient, and arranges the negative pole piece line scanning station before the laser cutting of pole ears 300 to detect defects on the surface of the incoming material, so as to avoid detecting defects after the laser cutting of pole ears 300, and removing the pole piece in the negative pole rejection component, resulting in a situation where the battery cell will be missing. The diaphragm double unwinding, automatic tape splicing mechanism, and tail material collection mechanism 180 are adopted. The diaphragm unwinding method is changed to diaphragm double unwinding and equipped with a double unwinding automatic tape splicing mechanism. For the tape position at the connection of the reel splicing, the tail material collection mechanism 180 is used to remove the diaphragm, so as to avoid the splicing position affecting the battery cell, avoid the entire battery cell being scrapped, and avoid material waste. At the same time, double-sided gluing and automatic patching solutions are adopted. Gluing is applied between the detected bad composite sheets and diaphragms. When the four-layer hot press is hot pressed, the positive electrode sheet and the diaphragm will not be excessively adhered. The bad sheet is replaced on the semi-automatic patching mechanism to become a qualified battery cell. The short-circuit tracking component is located after the composite sheet line scanning detection mechanism 160, and is used to detect whether the composite sheet unit sheet is short-circuited. The linear motor 163 is used for tracking and clamping detection to simultaneously detect the short circuit of the four composite sheet units.

[0070] In summary, the embodiment of the present invention utilizes the negative electrode material line mechanism 110 and the positive electrode material line mechanism 140 to realize the conveyance of the negative electrode unit sheet and the positive electrode unit sheet respectively, and utilizes the double unwinding diaphragm material line mechanism 120 to provide a continuous diaphragm, and the connection of the diaphragm is affixed with a connecting tape with a color code, the negative electrode rolling assembly 130 can roll and compound the diaphragm and the negative electrode unit sheet, and the positive electrode composite assembly 150 can thermally compound the positive electrode unit sheet with the rolled and compounded diaphragm and the negative electrode unit sheet to form a composite sheet. The composite sheet is inspected by the inspection mechanism 160 to identify the NG sheet, and then the double-sided gluing mechanism 170 is used to implement gluing to form an anti-adhesive layer, and the tail material collection mechanism 180 collects the diaphragm tail material at the connecting tape, thereby avoiding the influence of the joint position on the battery cell, avoiding the entire battery cell being scrapped, and avoiding material waste. Since the anti-sticking layer is provided, the offline patching mechanism 200 can re-expand and patch the NG battery cells formed after stacking, can realize online detection and offline patching, patch defective products in time, improve the battery cell yield, and improve production efficiency.

[0071] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite laser cutting and laminating machine, characterized in that: include: A negative electrode material line mechanism, used for providing a negative electrode material strip and cutting the negative electrode material strip into negative electrode unit sheets; A double unwinding diaphragm material line mechanism is used to provide continuous diaphragms, and the connection of the diaphragms is provided with a connecting tape with a color code; A negative electrode rolling assembly is arranged at the discharge side of the negative electrode material line mechanism and the diaphragm material line mechanism, and is used to roll and composite the diaphragm and the negative electrode unit sheet; A positive electrode material line mechanism, used for providing positive electrode material strips and cutting the positive electrode material strips into positive electrode unit sheets; A positive electrode composite assembly is arranged at the discharge side of the positive electrode material line mechanism and the negative electrode rolling assembly, and is used to perform a thermal composite treatment on the positive electrode unit sheet, the separator and the negative electrode unit sheet to form a composite sheet; A detection mechanism, arranged at the discharge side of the positive electrode composite assembly, for detecting the composite sheet; A double-sided gluing mechanism, arranged on the discharging side of the detection mechanism, is used to glue the surfaces of both sides of the defective electrode portion in the composite sheet and form an anti-adhesive layer; A tailings collecting mechanism, arranged at the discharging side of the double-sided gluing mechanism, for collecting the diaphragm tailings at the connecting tape on the composite sheet; A double-station stacking mechanism, arranged at the discharge side of the tail material collecting mechanism, for stacking the composite sheets to form a battery core; The off-line patching mechanism is arranged on the discharge side of the double-station stacking mechanism and is used for patching the NG battery cells.

2. The composite laser cutting and laminating machine according to claim 1, characterized in that: The tail material collection mechanism includes a dual-drive component, a first hot electrode cutter, a second hot electrode cutter and a tail material collection clamp. The dual-drive component has a drive channel for the composite sheet to pass through. The first hot electrode cutter, the second hot electrode cutter and the tail material collection clamp are all arranged in the dual-drive component. The first hot electrode cutter and the second hot electrode cutter are arranged at intervals on one side of the drive channel to cut off the diaphragm tail material at the connecting tape on the composite sheet. The tail material collection clamp is arranged between the first hot electrode cutter and the second hot electrode cutter, and can extend into and out of the drive channel to collect the diaphragm tail material.

3. The composite laser cutting and laminating machine according to claim 2, characterized in that: The dual-drive assembly includes a dual-drive housing, a color mark detector, a first drive roller group and a second drive roller group. The first drive roller group and the second drive roller group are arranged in the dual-drive housing at intervals to form the drive channel. The color mark detector is arranged on the feeding side of the dual-drive housing to detect the color mark on the composite sheet. The tail material collecting clamp is arranged between the first drive roller group and the second drive roller group.

4. The composite laser cutting and laminating machine according to claim 1, characterized in that: The offline patching mechanism includes a unit sheet silo, an NG battery cell box, a battery cell patching assembly, a battery cell hot pressing assembly and a gluing platform which are arranged in sequence. The unit sheet silo stores unit sheets for patching. The NG battery cell box is used to store NG battery cells stacked by the double-station stacking mechanism. The battery cell patching assembly is used to unfold the NG battery cells and perform patching. The battery cell hot pressing assembly is used to perform hot pressing on the NG battery cells after patching. The gluing platform is used to perform a gluing process on the NG battery cells after hot pressing to form qualified battery cells.

5. The composite laser cutting and laminating machine according to claim 4, characterized in that: The offline patching mechanism also includes a transplanting track, a transplanting robot, a hot pressing loading robot and a hot pressing unloading robot. The transplanting robot can be slidably arranged on the transplanting track and can move between the unit cell material bin, the NG battery cell material box and the battery cell patch assembly to realize material transfer. The hot pressing unloading robot and the hot pressing loading robot are both arranged on the transplanting track, and the hot pressing loading robot is arranged between the battery cell patch assembly and the battery cell hot pressing assembly, and is used to deliver the NG battery cell with patching completed to the battery cell hot pressing assembly. The hot pressing unloading robot is arranged between the battery cell patch assembly and the glue pasting platform, and is used to deliver the NG battery cell with hot pressing completed to the glue pasting platform.

6. The composite laser cutting and laminating machine according to claim 1, characterized in that: The double unwinding diaphragm material line mechanism includes a first diaphragm unwinding roller, a second diaphragm unwinding roller, a diaphragm automatic splicing platform, a diaphragm pressing platform and a glue preparation platform. The diaphragm automatic splicing platform is arranged between the first diaphragm unwinding roller and the second diaphragm unwinding roller. The diaphragm pressing platform is arranged on the diaphragm automatic splicing platform and is used to press the connection of the diaphragm. The glue preparation platform is provided with a tape rotating cylinder, and the tape rotating cylinder is used to bond the connecting tape to the connection of the diaphragm.

7. The composite laser cutting and laminating machine according to claim 1, characterized in that: The detection mechanism includes a composite sheet detection component and a short-circuit test component. The composite sheet detection component is arranged on the discharge side of the positive composite component and is used to detect the lug height of the composite sheet. The short-circuit test component is arranged on the side of the composite sheet detection component away from the positive composite component and is used to perform short-circuit tests on the positive and negative electrode units on the composite sheet.

8. The composite laser cutting and laminating machine according to claim 7, characterized in that: The short-circuit test assembly includes a linear motor and a four-station short-circuit detection block. The linear motor is transmission-connected to the four-station short-circuit detection block for driving the four-station short-circuit detection block to move synchronously with the composite sheet and press it on the pole ear of the composite sheet to perform a short-circuit test.

9. The composite laser cutting and laminating machine according to claim 7, characterized in that: The short-circuit test assembly includes a synchronous wheel, a synchronous belt and a plurality of short-circuit detection blocks. The synchronous belt is wound around the synchronous wheel, and a plurality of short-circuit detection blocks are arranged on the synchronous belt. The synchronous wheel is used to drive the synchronous belt to move so that one side of the synchronous belt moves synchronously with the composite sheet. The short-circuit detection block is used to contact the pole ear on the composite sheet and perform a short-circuit test.

10. The composite laser cutting and laminating machine according to claim 7, characterized in that: The composite sheet detection component includes a front camera, a rear camera, a front light source, a rear annular light source, a front annular light source and a rear light source, the front camera is arranged at an interval on the front side of the composite sheet, the front annular light source is arranged between the front camera and the composite sheet, the rear light source is arranged on a side of the composite sheet away from the front annular light source, the rear camera is arranged on the rear side of the composite sheet and is staggered with the front camera, the rear annular light source is arranged between the composite sheet and the rear camera, and the front light source is arranged on a side of the composite sheet away from the rear annular light source.

Images