A semi-solid lithium ion battery cell lamination correction device

Abstract

The application relates to the technical field of lithium battery processing, in particular to a semi-solid lithium ion battery cell lamination correction device which comprises a rack, a pole piece correction mechanism, a negative pressure adsorption mechanism and a mechanical hand. When working, the mechanical hand places the pole piece on the correction platform, and a sensor detects the position offset; then, the first and second alignment modules of the pole piece correction mechanism alternately move along the diagonal direction of the correction platform, sequentially apply force to the adjacent two sides of the pole piece, and gradually correct to the reference position. After correction, the surface state of the pole piece is detected by using a laser sensor or a CCD, if there is warping, the negative pressure adsorption mechanism applies uniform adsorption force through the negative pressure holes on the correction platform, so that the pole piece is flat and adheres to the platform. The device corrects the position and levels the surface in steps, prevents action interference, improves the control precision and reliability, meanwhile, the negative pressure adsorption can remove the metal debris on the surface of the pole piece, effectively improves the uniformity of the internal structure of the pole piece after lamination, and improves the battery performance and service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery processing, in particular to a semi-solid lithium ion battery cell lamination correction device. BACKGROUND

[0002] Lithium ion batteries, as a new strategic industry, are widely used in new energy vehicles, unmanned aerial vehicles, wearable devices and other fields due to their high energy density, long cycle life and low self-discharge rate. Semi-solid lithium ion usually refers to a battery with a liquid electrolyte mass ratio of 5%-10%. It forms a gel or composite layer by introducing a solid-state electrolyte (such as oxide or polymer) on the electrode or separator, thereby combining the advantages of both types of electrolytes. The electrolyte of the semi-solid battery is a mixture of solid and liquid, with a much higher viscosity than liquid electrolyte, and poor flowability. During the production of the battery cell, the bending structure of the winding process makes it difficult for the high-viscosity electrolyte to uniformly infiltrate and distribute inside, which can easily cause dry areas and affect performance. The flat interface of the lamination process allows the high-viscosity electrolyte to be more evenly applied and maintained between each layer of the electrode sheet, ensuring a stable ion conduction channel. Therefore, semi-solid lithium ion batteries mostly use the lamination process.

[0003] Semi-solid lithium ion batteries need to go through several processes such as homogenization, coating, rolling, slicing, lamination, packaging, liquid injection and formation during production. Low-temperature high-power lithium batteries work similarly to ordinary lithium ion batteries, both of which use lithium ions to embed and de-embed between the positive and negative electrodes to achieve the charging and discharging process of the battery. Lamination is a key process in lithium ion battery manufacturing, which includes alternately stacking positive and negative electrode sheets and separators through mechanical devices to form the core structure of the battery. First, the positive and negative electrode sheets are sent to the laminator after coating and cutting. The separator is placed between the positive and negative electrode sheets to act as an insulator and prevent short circuits. During the lamination process, the position of each layer of electrode sheet is accurately placed, and then the layers are tightly combined through a hot pressing or pressing step to finally form a multi-layer laminated unit, ensuring efficient conduction of ions and electrons inside the battery.

[0004] In existing processes, if the electrode sheet surface is uneven or placed at an angle, it will have a significant impact on the performance and safety of lithium batteries. Uneven electrode sheet surface can cause uneven distribution of active materials, leading to local charge concentration, accelerating electrode degradation, and reducing the cycle life and capacity retention rate of the battery. At the same time, uneven surfaces increase internal resistance, affecting charging and discharging efficiency. Placing at an angle can cause alignment deviation between electrode sheets, causing uneven pressure on the separator, increasing the risk of internal short circuits, which can lead to battery thermal runaway or early failure, affecting overall reliability and safety. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a semi-solid lithium ion battery cell lamination correction device, which aims to improve the performance of the lamination process, improve the surface flatness of the pole piece and reduce the alignment deviation between the pole pieces.

[0006] According to an embodiment of the present application, a semi-solid lithium ion battery cell lamination correction device comprises:

[0007] a rack;

[0008] a pole piece correction mechanism, the pole piece correction mechanism is provided with a correction platform on the rack, the correction platform is used for placing a pole piece; the correction platform is provided with a negative pressure hole; the pole piece correction mechanism is provided with a first alignment module and a second alignment module on both sides of the diagonal line of the correction platform, the first alignment module and the second alignment module can move alternately in the horizontal direction;

[0009] a negative pressure adsorption mechanism, the negative pressure adsorption mechanism is communicated with the negative pressure hole, and the negative pressure adsorption mechanism can control the pressure of the negative pressure hole;

[0010] a manipulator, the manipulator is arranged on the rack, and the manipulator is provided with a suction cup for picking and placing the pole piece.

[0011] According to some embodiments of the present application, the rack comprises a correction support frame, and the correction support frame is provided with a first base plate;

[0012] The first alignment module comprises a first cylinder, a first connecting block, a first sliding block, a second sliding block and a first connecting rod; the first cylinder is fixedly connected with the first base plate; the first sliding block and the first base plate are slidingly connected, and the second sliding block and the first base plate are slidingly connected; one end of the first connecting block is fixedly connected with the output end of the first cylinder, and the other end of the first connecting block is fixedly connected with the first sliding block; the first sliding block is provided with a first guide inclined slot, one end of the first connecting rod is slidingly arranged in the first guide inclined slot, and the other end of the first connecting rod is fixedly connected with the first sliding block;

[0013] The second alignment module comprises a second cylinder, a second connecting block, a third sliding block, a fourth sliding block and a second connecting rod; the second cylinder is fixedly connected with the first base plate; the third sliding block and the first base plate are slidingly connected, and the fourth sliding block and the first base plate are slidingly connected; one end of the second connecting block is fixedly connected with the output end of the second cylinder, and the other end of the second connecting block is fixedly connected with the third sliding block; the fourth sliding block is provided with a second guide inclined slot, one end of the second connecting rod is slidingly arranged in the second guide inclined slot, and the other end of the second connecting rod is fixedly connected with the third sliding block.

[0014] According to some embodiments of the present application, the first slider, the second slider, the third slider and the fourth slider are respectively provided with a push plate, and the push plate is provided with an adjusting groove; one side of the push plate is provided with an elastic pad, and the elastic pad is fixed in the adjusting groove through a locking bolt.

[0015] According to some embodiments of the present application, the negative pressure suction mechanism comprises an adjusting module and a flow distribution module; the adjusting module is arranged at the lower end of the correction platform; the adjusting module is linearly arranged with n first channels along the X-axis and Y-axis directions, and is arranged with m shaft holes along the Y-axis direction; all the first channels in the X-axis direction and one of the shaft holes are communicated; an adjusting shaft is rotatably arranged in the shaft hole, and one adjusting hole is arranged on the adjusting shaft corresponding to each first channel; when the adjusting shaft rotates, the adjusting hole can communicate or close the first channel; wherein n≥4; m≥2.

[0016] According to some embodiments of the present application, the axis of the adjusting hole and the axis of the adjusting shaft are perpendicular to each other and do not intersect.

[0017] According to some embodiments of the present application, the adjusting holes on the adjusting shaft are distributed in spiral lines on the adjusting shaft; when the adjusting shaft rotates, the adjusting holes can sequentially communicate or close the first channels in the X-axis direction.

[0018] According to some embodiments of the present application, one end of the adjusting shaft is respectively provided with a driving motor and a shaft coupling, the driving motor is fixedly connected with the rack through a motor fixing seat, and the output end of the driving motor is drivingly connected with the adjusting shaft through the shaft coupling; the driving motors of the adjusting shafts adjacent in the Y-axis direction are respectively located on both sides of the adjusting module.

[0019] According to some embodiments of the present application, the flow distribution module is provided with m flow distribution grooves along the Y-axis direction, and each flow distribution groove communicates all the first channels in the X-axis direction; the lower end of the flow distribution groove is provided with an air inlet pipe, and the air inlet pipe is communicated with a negative pressure mechanism.

[0020] According to some embodiments of the present application, the mechanical hand comprises a second base plate, a first lead screw, a mounting plate, a second motor, a first lifting module and a second lifting module, the second base plate is fixedly connected with the rack, the first lead screw is rotatably connected with the second base plate, and one end of the first lead screw is drivingly connected with the second motor; the mounting plate is slidingly connected with the second base plate in the horizontal direction and is threadedly connected with the first lead screw; the first lifting module and the second lifting module are respectively fixedly connected with the mounting plate.

[0021] According to some embodiments of the present application, the first lifting module and the second lifting module are provided with a third motor, a second screw rod, a lifting plate and a fixed adjusting seat, the third motor is fixedly connected with the mounting plate, the second screw rod is rotatably connected with the mounting plate, and one end of the second screw rod is drivingly connected with the third motor; the lifting plate is slidingly connected with the mounting plate in the vertical direction, the lifting plate is threadedly connected with the second screw rod, the fixed adjusting seat is fixedly connected with the lifting plate, and the suction disc is mounted on the fixed adjusting seat.

[0022] According to the semi-solid lithium ion cell lamination correction device provided by the embodiment of the present application, at least the following beneficial effects are achieved:

[0023] According to the scheme of the present application, the semi-solid lithium ion cell lamination correction device comprises a rack, a lamination correction mechanism, a negative pressure adsorption mechanism and a mechanical hand. After the lamination is placed on the correction platform by the mechanical hand, the position of the lamination is detected by a sensor to obtain the current position offset data of the lamination. Further, the lamination correction mechanism starts to work, and the first alignment module and the second alignment module alternately move along the two sides of the diagonal line of the correction platform according to the detected position information, and respectively apply a horizontal force to the adjacent two sides of the lamination. This alternative pushing method gradually corrects the lamination to completely coincide with the preset reference position of the correction platform. After the position adjustment is completed, the surface state of the lamination is scanned by a laser position sensor or a CCD. When it is detected that the lamination has a warping or uneven phenomenon, the negative pressure adsorption mechanism applies a uniform adsorption force by controlling the pressure communicated with the negative pressure hole on the correction platform, so as to firmly adsorb and adhere the lamination to the flat surface of the correction platform, thereby realizing the leveling of the lamination.

[0024] According to the scheme of the present application, by decomposing the position correction and the surface leveling into two independent and sequentially executed stages, and respectively by the special mechanism, the problem of mutual interference of various adjustment actions is effectively avoided. This step-by-step processing strategy makes the target of each operation very clear, greatly improving the control accuracy of the whole correction process and the reliability of the final result.

[0025] According to the scheme of the present application, the lamination correction mechanism adopts the design of the first alignment module and the second alignment module alternately moving, and sequentially applies force to the adjacent two sides of the lamination, rather than simultaneously extruding the four sides or opposite sides of the lamination. This one-way sequential force application mode eliminates the risk of wrinkles, deformation or internal structure damage of the lamination due to bidirectional or multidirectional simultaneous extrusion, effectively preventing physical damage of the lamination during the correction process.

[0026] According to the scheme of the present application, by position calibration and surface leveling of the pole piece before lamination, the device improves the uniformity and consistency of the internal structure of the battery cell in the subsequent lamination process, thereby significantly reducing the risk of increased battery resistance, shortened cycle life and even internal short circuit caused by pole piece misalignment or unevenness, and improving the quality and service life of the battery cell.

[0027] According to the scheme of the present application, the negative pressure hole can clean the metal debris on the surface of the pole piece when providing negative pressure. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present application;

[0029] Figure 2 It is an assembly structural schematic diagram of the pole piece correction mechanism and the negative pressure adsorption mechanism of the present application;

[0030] Figure 3 It is a top view structural schematic diagram of the pole piece correction mechanism of the present application;

[0031] Figure 4 It is a structural schematic diagram of the negative pressure adsorption mechanism of the present application;

[0032] Figure 5 It is an exploded structural schematic diagram of the negative pressure adsorption mechanism of the present application;

[0033] Figure 6 It is a sectional structural schematic diagram of the negative pressure adsorption mechanism of the present application;

[0034] Figure 7 It is a structural schematic diagram of the adjusting shaft of the present application;

[0035] Figure 8 It is a structural schematic diagram of the mechanical hand of the present application;

[0036] Figure 9 It is a structural schematic diagram of the first lifting module of the present application.

[0037] In the figure:

[0038] 100 - rack, 110 - correction support frame, 111 - first base plate;

[0039] 200 - pole piece correction mechanism, 210 - correction platform, 211 - negative pressure hole, 220 - first alignment module, 221 - first air cylinder, 222 - first connecting block, 223 - first sliding block, 224 - second sliding block, 225 - first connecting rod, 226 - first guide chute, 230 - second alignment module, 231 - second air cylinder, 232 - second connecting block, 233 - third sliding block, 234 - fourth sliding block, 235 - second connecting rod, 236 - second guide chute, 240 - push plate, 241 - adjusting groove, 250 - elastic pad, 251 - locking bolt

[0040] 300 - negative pressure adsorption mechanism, 310 - adjusting module, 311 - first channel, 312 - shaft hole, 313 - adjusting shaft, 314 - adjusting hole, 315 - driving motor, 316 - shaft coupling, 317 - motor fixing seat, 320 - flow distribution module, 321 - flow distribution groove, 322 - air inlet pipe

[0041] 400 - manipulator, 401 - suction cup, 410 - second base plate, 420 - first lead screw, 430 - mounting plate, 440 - second motor, 450 - first lifting module, 460 - second lifting module, 461 - third motor, 462 - second lead screw, 463 - lifting plate, 464 - fixed adjusting seat. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0043] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] In the description of the present application, the plural refers to two or more. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0045] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0046] Referring to Figures 1 to 9 As shown in the figure, the application discloses a kind of semi-solid lithium ion battery cell laminates correction device, including rack 100, pole piece correction mechanism 200, negative pressure suction mechanism 300 and manipulator 400, wherein pole piece correction mechanism 200 is set with correction platform 210 on rack 100, and correction platform 210 is used to place pole piece;Correction platform 210 is provided with negative pressure hole 211;Pole piece correction mechanism 200 is respectively provided with first alignment module 220 and second alignment module 230 along the diagonal line of correction platform 210 two sides, and first alignment module 220 and second alignment module 230 can alternately move along horizontal direction;The opposite sides of pole piece are alternately applied with alternating force, so that pole piece and correction platform 210 overlap, and the position state of pole piece is detected by laser sensor, negative pressure suction mechanism 300 and negative pressure hole 211 are communicated, and negative pressure suction mechanism 300 can control the pressure of negative pressure hole 211;Manipulator 400 is set on rack 100, and manipulator 400 is provided with suction cup 401, for taking and placing pole piece.

[0047] Referring to Figure 1As shown, specifically, in operation, the manipulator 400 moves the suction cup 401 above the pole piece storage rack to pick up the pole piece and then moves to the correction platform 210 to drop it off, and the pole piece is positionally calibrated and surface leveled on the correction platform 210, after which the manipulator 400 picks up the pole piece again and moves it to the stacking platform for stacking. After the manipulator 400 places the pole piece on the correction platform 210, the position of the pole piece is detected by a sensor to obtain the current positional offset data of the pole piece. Further, the pole piece correction mechanism 200 starts to work, and the first alignment module 220 and the second alignment module 230 alternately move along the two sides of the diagonal line of the correction platform 210 according to the detected positional information to respectively apply a horizontal force to the adjacent two sides of the pole piece. This alternative pushing method gradually corrects the pole piece to completely coincide with the preset reference position of the correction platform 210. After completing the positional adjustment, the surface state of the pole piece is scanned by a laser position sensor or a CCD. When it is detected that the pole piece has a warping or uneven phenomenon, the negative pressure suction mechanism 300 applies a uniform suction force by controlling the pressure communicated with the negative pressure hole 211 on the correction platform 210 to firmly suction and adhere the pole piece to the flat surface of the correction platform 210, thereby achieving the leveling of the pole piece. Through the design of the structure, the positional correction and surface leveling are divided into two independent and sequentially executed stages, and are respectively responsible by a special mechanism, effectively avoiding the problem of mutual interference of multiple adjustment actions. This step-by-step processing strategy makes the target of each operation very clear, greatly improving the control accuracy of the entire correction process and the reliability of the final result. The pole piece correction mechanism 200 adopts the design of the first alignment module 220 and the second alignment module 230 alternately moving to sequentially apply force to the adjacent two sides of the pole piece, rather than simultaneously pressing the four sides or opposite sides of the pole piece. This one-way sequential force application mode eliminates the risk of creasing, deformation or internal structure damage of the pole piece due to simultaneous bidirectional or multidirectional pressing, effectively preventing physical damage of the pole piece during the correction process. By positionally calibrating and surface leveling the pole piece before stacking, the device improves the uniformity and consistency of the internal structure of the battery cell in the subsequent stacking process, thereby significantly reducing the risk of increased battery internal resistance, shortened cycle life, and even internal short circuit caused by mispositioning or unevenness of the pole piece, and improving the quality and service life of the battery cell.

[0048] In some embodiments of the present application, the rack 100 comprises a correction support frame 110, and a first alignment module 220 and a second alignment module 230 are arranged on the correction support frame 110. The first alignment module 220 comprises a first air cylinder 221, a first connecting block 222, a first sliding block 223, a second sliding block 224 and a first connecting rod 225. The first air cylinder 221 is fixedly connected with the first base plate 111. The first sliding block 223 and the second sliding block 224 are slidably connected with the first base plate 111. One end of the first connecting block 222 is fixedly connected with the output end of the first air cylinder 221, and the other end of the first connecting block 222 is fixedly connected with the first sliding block 223. A first guide inclined slot 226 is arranged on the second sliding block 224, one end of the first connecting rod 225 is slidably arranged in the first guide inclined slot 226, and the other end of the first connecting rod 225 is fixedly connected with the first sliding block 223. The second alignment module 230 comprises a second air cylinder 231, a second connecting block 232, a third sliding block 233, a fourth sliding block 234 and a second connecting rod 235. The second air cylinder 231 is fixedly connected with the first base plate 111. The third sliding block 233 and the fourth sliding block 234 are slidably connected with the first base plate 111. One end of the second connecting block 232 is fixedly connected with the output end of the second air cylinder 231, and the other end of the second connecting block 232 is fixedly connected with the third sliding block 233. A second guide inclined slot 236 is arranged on the fourth sliding block 234, one end of the second connecting rod 235 is slidably arranged in the second guide inclined slot 236, and the other end of the second connecting rod 235 is fixedly connected with the third sliding block 233.

[0049] With reference to Figures 1 to 3As shown, specifically, in the present embodiment, after the manipulator 400 places the pole piece on the correction platform 210, the sensor first performs position detection to obtain offset data. Subsequently, the pole piece correction mechanism 200 starts to work, and the first cylinder 221 and the second cylinder 231 act alternately according to the detection information. Specifically, the first cylinder 221 is started, and the first cylinder 221 drives the first sliding block 223 to move in the horizontal direction towards the correction platform 210 through the first connecting block 222, while the first sliding block 223 can move in the first guide inclined groove 226 through one end of the first connecting rod 225 when moving, driving the second sliding block 224 to move in the horizontal direction towards the correction platform 210. Through the design of the first connecting rod 225 and the first guide inclined groove 226, the synchronous movement of the first sliding block 223 and the second sliding block 224 can be realized. The force is applied to the two adjacent sides of the pole piece at the same time, and the pole piece and the correction platform 210 are aligned. Then, the second cylinder 231 is started, and the second cylinder 231 drives the third sliding block 233 to move in the horizontal direction towards the correction platform 210 through the second connecting block 232, while the third sliding block 233 can move in the second guide inclined groove 236 through one end of the second connecting rod 235 when moving, driving the fourth sliding block 234 to move in the horizontal direction towards the correction platform 210, realizing the alignment of the diagonal side of the pole piece. Through the position information of the pole piece obtained by the sensor in the whole working process, the number of actions of the first cylinder 221 and the second cylinder 231 is cycled according to the position information data of the pole piece, and when the position information data of the pole piece is in the set standard range, the first cylinder 221 and the second cylinder 231 stop working and perform the next surface flattening work. Through the design of the structure, the first alignment module 220 and the second alignment module 230 both adopt the mechanical linkage scheme of cylinder driving combined with inclined groove-connecting rod mechanism. The design ensures that the two modules can apply force to the adjacent two sides of the pole piece in sequence and in one direction, rather than simultaneously pressing. This alternating force mode fundamentally eliminates the risk of wrinkles, deformation or coating damage of the pole piece due to uneven force in two directions. By calibrating the position of the pole piece before lamination, the device ensures the uniformity and consistency of the internal structure of the battery cell in the subsequent lamination process. It reduces the risk of increased battery internal resistance, shortened cycle life and even internal short circuit caused by misalignment or unevenness of the pole piece, and improves the overall quality and service life of the battery cell from the source.

[0050] In some embodiments of the present application, with reference to Figures 1 to 3As shown, the first slider 223, the second slider 224, the third slider 233 and the fourth slider 234 are respectively provided with a push plate 240, and the push plate 240 is provided with an adjusting groove 241; one side of the push plate 240 is provided with an elastic pad 250, and the elastic pad 250 is fixed in the adjusting groove 241 through a locking bolt 251. Specifically, in the embodiment, after the manipulator 400 places the pole piece on the correction platform 210, the sensor first performs position detection. Then, the pole piece correction mechanism 200 starts to work. The first cylinder 221 of the first alignment module 220 acts, drives the first slider 223 to move linearly forward through the first connecting block 222, and the push plate 240 fixed on the first slider 223 moves to one side of the pole piece. At the same time, through the cooperation of the first connecting rod 225 and the first guide inclined groove 226, the second slider 224 also synchronously moves to the adjacent side of the pole piece with the push plate 240 thereon. According to this principle, the two alignment modules act alternately in sequence according to the control signal. Finally, the push plates 240 on the four sliders contact the adjacent two side edges of the pole piece in time and in sequence. The elastic pad 250 provided on one side of the push plate 240 serves as a direct contact piece, and under the premise that the locking bolt 251 is fixed in the adjusting groove 241, the elastic pad 250 provides a soft and buffered pushing force for the pole piece. This flexible and alternating pushing gradually corrects the pole piece to the preset position. After the position correction is completed, the system performs surface flatness detection, and the final leveling is completed by the negative pressure adsorption mechanism 300. The elastic pad 250 provided on the push plate 240 serves as a medium directly contacting the pole piece, and can effectively buffer the instantaneous impact force of the rigid push plate 240 and the pole piece edge. This flexible contact mechanism greatly reduces the risk of scratching the surface of the pole piece or damaging the fragile edge of the pole piece during the pushing and correcting process, and fundamentally prevents physical damage caused by mechanical correction. The adjusting groove 241 designed on the push plate 240 allows the installation position of the elastic pad 250 to be adjusted flexibly through the locking bolt 251. This design enables the same set of correction devices to quickly adapt to pole pieces of different sizes, significantly enhancing the versatility of the equipment. When the product is changed or the size is adjusted, the hardware does not need to be replaced, and only simple adjustment is needed, improving the flexibility and efficiency of the production line. At the same time, by adjusting the installation position of the elastic pad 250, the protruding parts of the pole piece, such as the pole ear, can be avoided.

[0051] In some embodiments of the present application, with reference to Figures 4 to 7As shown, the negative pressure suction mechanism 300 comprises an adjusting module 310 and a flow distribution module 320; the adjusting module 310 is arranged at the lower end of the correction platform 210; the adjusting module 310 is linearly arranged with n first channels 311 along the X-axis and Y-axis directions, and the adjusting module 310 is arranged with m shaft holes 312 along the Y-axis direction; all the first channels 311 along the X-axis direction and one of the shaft holes 312 are communicated; the shaft hole 312 is rotationally arranged with an adjusting shaft 313, and the adjusting shaft 313 is arranged with an adjusting hole 314 corresponding to each first channel 311; when the adjusting shaft 313 rotates, the adjusting hole 314 can communicate or close the first channel 311; wherein n≥4; m≥2. Specifically, in the embodiment, after the manipulator 400 places the pole piece on the correction platform 210 and completes the position correction, the system scans the surface of the pole piece through the sensor; in the embodiment, the scanning mode can adopt linear scanning by using a laser range finder, or image comparison scanning by using a CCD. When it is detected that there is a warping in a specific area of the pole piece, the negative pressure suction mechanism 300 is started. The flow distribution module 320 generates negative pressure and delivers it to the adjusting module 310. The operator or the control system accurately rotates the corresponding adjusting shaft 313 according to the detected warping position. When the adjusting hole 314 on the adjusting shaft 313 is rotated to be aligned with the target first channel 311, the negative pressure acts on the corresponding specific negative pressure hole 211 area on the correction platform 210 through the first channel 311, so as to generate a strong suction force in the local area only, tightly pull down the warped part, and make it adhere to the platform surface. By controlling the rotation angle of different adjusting shafts 313, one or more independent suction areas can be flexibly selected to open, so as to realize accurate and controllable leveling of the pole piece locally or as a whole. The design divides the suction area into multiple controllable units through multiple independently controlled adjusting shafts 313 and multiple first channels 311. This enables the system to apply negative pressure to the local area according to the actual warping position and shape of the pole piece, rather than uniformly suctioning the whole. It is particularly effective for processing complex or asymmetric warping problems, significantly improves the final flatness of the pole piece, and avoids wasting negative pressure in the already flat area by selectively opening the first channel 311 corresponding to the warped area. This on-demand allocation of negative pressure resources greatly reduces the load and energy consumption of the flow distribution module 320, so that the whole system runs more efficiently and energy-savingly.

[0052] In some embodiments of the present application, with reference to Figure 7As shown, the axis of the adjusting hole 314 and the axis of the adjusting shaft 313 are perpendicular to each other and do not intersect. Specifically, in the present embodiment, by the design of the structure, the axis of the adjusting hole 314 and the axis of the adjusting shaft 313 are perpendicular to each other, the adjusting hole 314 is a radial hole, and the adjusting shaft 313 can control the action of multiple adjusting holes 314 at the same time. At the same time, the axis of the adjusting hole 314 and the axis of the adjusting shaft 313 do not intersect, and further, the projection of the adjusting hole 314 along its axial direction and the axis of the adjusting shaft 313 do not intersect. It can be understood that when the center of the circle of the projection of the adjusting hole 314 along its axial direction is on the axis of the adjusting shaft 313, the adjusting shaft 313 first communicates with the first channel 311, and after rotating 180°, the adjusting hole 314 and the first channel 311 in the vertical direction can be communicated; and by using an asymmetric structure, i.e., the projection of the adjusting hole 314 along its axial direction and the axis of the adjusting shaft 313 do not intersect, the adjusting hole 314 and the first channel 311 can be communicated only after rotating 360°. By the design of the structure, when the axial diameter of the adjusting shaft 313 and the hole diameter of the adjusting hole 314 are unchanged, the adjusting shaft 313 can accommodate the adjusting hole 314 to the maximum extent.

[0053] In some embodiments of the present application, with reference to Figure 7 As shown, the adjusting holes 314 on the adjusting shaft 313 are distributed in a spiral line on the adjusting shaft 313; when the adjusting shaft 313 rotates, the adjusting holes 314 can sequentially communicate or close the first channels 311 in the X-axis direction. Specifically, in the present embodiment, the adjusting holes 314 on the adjusting shaft 313 have the same axial spacing, which is the hole spacing of the first channels 311, and the adjusting holes 314 are distributed in a spiral on the adjusting shaft 313, i.e., the projection of the axis of the adjusting hole 314 on the end face of the adjusting shaft 313 has an included angle. When it is necessary to level a specific area, the driving motor 315 drives the adjusting shaft 313 to rotate. Due to the spiral distribution of the adjusting holes 314, during uniform rotation of the adjusting shaft 313, the adjusting holes 314 will sequentially connect and then close the multiple first channels 311 arranged along the X-axis direction one by one. Compared with the traditional valve type instantaneous on-off, the sequential communication and closing of the adjusting holes 314 make the adsorption force received by any local area a smooth increasing and then decreasing process. This soft force control method avoids the instantaneous impact on the pole piece caused by the sudden application or release of negative pressure, and further protects the fragile pole piece from potential stress damage.

[0054] In some embodiments of the present application, with reference to Figure 5 and Figure 6As shown, one end of the adjusting shaft 313 is respectively provided with a driving motor 315 and a shaft coupling 316, the driving motor 315 is fixedly connected through a motor fixing seat 317 and the rack 100, and the output end of the driving motor 315 is drivingly connected with the adjusting shaft 313 through the shaft coupling 316; the driving motors 315 of the adjusting shafts 313 adjacent in the Y-axis direction are respectively located on the two sides of the adjusting module 310. Specifically, in the embodiment, when the system needs to control different adsorption areas according to the pole piece surface detection signal, the corresponding driving motor 315 receives the instruction and starts to rotate. The power is transmitted to the adjusting shaft 313 through the shaft coupling 316 to drive it to rotate accurately. After rotating to the specified position, the corresponding first channel 311 is connected, so that the pole piece of the specified area is flattened. Through the design of the structure, although the total number of the driving motors 315 does not change, by staggering them on the two sides of the module, it is equivalent to distributing the volume of the driving system to the width direction of the equipment, rather than all being stacked in the depth or height direction. This is conducive to controlling the size of the equipment in a certain direction, so that the overall structure is more compact and balanced, and the space utilization of the equipment in the production line layout is improved.

[0055] In some embodiments of the present application, reference is made to Figure 5As shown, the flow distribution module 320 is provided with m flow distribution grooves 321 along the Y-axis direction, and each flow distribution groove 321 is communicated with all the first channels 311 in the X-axis direction; the lower end of the flow distribution groove 321 is provided with an air inlet pipe 322, and the air inlet pipe 322 is communicated with the negative pressure mechanism. Specifically, in this embodiment, after the position correction is completed, the system detects the surface flatness of the pole piece. When the warping is found, the external negative pressure mechanism is started, and a stable negative pressure source is provided to the flow distribution module 320 through the air inlet pipe 322. The negative pressure first enters the corresponding flow distribution groove 321, and according to the warping area, the specific driving motor 315 is started to drive the corresponding adjusting shaft 313 to rotate. Since the adjusting holes 314 are distributed in a spiral line, during the rotation process, the negative pressure is sequentially distributed to the specific first channel 311 group in the X-axis direction through the adjusting holes 314 on the adjusting shaft 313, and finally acts on the corresponding negative pressure hole 211 area of the correction platform 210, and the flow distribution module 320 simplifies the complex multi-area negative pressure supply to multiple independent and parallel managed air paths through the one-groove-to-one-shaft air supply strategy. Each flow distribution groove 321 ensures that the corresponding entire adjusting shaft 313 can obtain uniform and stable negative pressure source in the X-axis direction, thereby realizing independent and accurate control of different Y-axis areas, and greatly optimizing the airflow distribution efficiency. Since one flow distribution groove 321 is communicated with all the first channels 311 in the X-axis direction, it ensures that during the dynamic adsorption process, no matter how the rotation angle of the adjusting shaft 313 is, the first channel 311 being connected can obtain negative pressure from the same stable pressure source. This avoids the uneven adsorption force caused by different air path or pressure fluctuation, and fundamentally guarantees the consistency and reliability of the pole piece leveling process.

[0056] In some embodiments of the present application, with reference to Figure 8As shown, the manipulator 400 comprises a second base plate 410, a first screw rod 420, a mounting plate 430, a second motor 440, a first lifting module 450 and a second lifting module 460. The second base plate 410 is fixedly connected with the rack 100, the first screw rod 420 is rotationally connected with the second base plate 410, and one end of the first screw rod 420 is drivingly connected with the second motor 440. The mounting plate 430 is slidingly connected with the second base plate 410 in the horizontal direction and is threadedly connected with the first screw rod 420. The first lifting module 450 and the second lifting module 460 are fixedly connected with the mounting plate 430, respectively. Specifically, in the embodiment, the second base plate 410 is fixedly connected with the rack 100 as the mounting base of the whole manipulator 400, and provides stable support. The first screw rod 420 is rotationally connected with the second base plate 410, and one end of the first screw rod 420 is driven to rotate by the second motor 440. The mounting plate 430 is threadedly connected with the first screw rod 420, and can be accurately and reciprocally linearly moved along the horizontal guide rail preset on the second base plate 410 under the driving of the second motor 440. The first lifting module 450 and the second lifting module 460 are fixedly connected with each other side by side on the mounting plate 430. The lower ends of the two lifting modules are both provided with suction cups 401 for picking up the pole pieces. When the mounting plate 430 is moved to the target position above the correction platform 210 in the horizontal direction, the first lifting module 450 and the second lifting module 460 are immediately synchronously or sequentially actuated to drive the suction cups 401 to perform the vertical downward and upward operations. The whole process realizes the picking up of the pole pieces from the pole piece storage rack, the horizontal transmission, the accurate positioning and the placement on the correction platform 210 by the manipulator 400.

[0057] In some embodiments of the present application, reference is made to Figure 9As shown, the first lifting module 450 and the second lifting module 460 are both provided with a third motor 461, a second screw rod 462, a lifting plate 463, and a fixed adjusting seat 464. The third motor 461 is fixedly connected with the mounting plate 430, the second screw rod 462 is rotatably connected with the mounting plate 430, and one end of the second screw rod 462 is drivingly connected with the third motor 461. The lifting plate 463 is slidably connected with the mounting plate 430 in the vertical direction, the lifting plate 463 is threadedly connected with the second screw rod 462, the fixed adjusting seat 464 is fixedly connected with the lifting plate 463, and the suction cup 401 is mounted on the fixed adjusting seat 464. Specifically, in the embodiment, the third motor 461 serves as a power source to drive the second screw rod 462 to rotate. The lifting plate 463 threadedly connected with the second screw rod 462 can be accurately lifted and lowered relative to the mounting plate 430 in the vertical direction under the driving of the motor. The fixed adjusting seat 464 is fixedly connected with the lifting plate 463, and the fixed adjusting seat 464 is used for mounting the suction cup 401. The second motor 440 drives the mounting plate 430 to move horizontally to above the target pole piece; then, the third motors 461 of the two lifting modules are synchronously or sequentially operated to drive the respective lifting plates 463 to descend, so that the suction cup 401 contacts and picks up the pole piece; then the lifting plate 463 is lifted, and finally the manipulator 400 moves horizontally to transport and place the pole piece on the correction platform 210. Each of the lifting modules is driven by the independent third motor 461 and the second screw rod 462 thereof. The modular design makes the lifting stroke and speed of the first lifting module 450 and the second lifting module 460 be independently and accurately controlled. This not only ensures the high repeat positioning accuracy of the lifting process, but also gives the system the flexibility of synchronous or asynchronous motion according to the requirements when performing the pick-and-place operation, so as to adapt to more complex process requirements.

[0058] The above embodiments of the present application are described in detail in combination with the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the present application.

Claims

1. A semi-solid-state lithium-ion cell stacking correction device, characterized in that, include: Rack (100); An electrode calibration mechanism (200) is provided on the frame (100) with a calibration platform (210) for placing electrodes; a negative pressure hole (211) is provided on the calibration platform (210); a first alignment module (220) and a second alignment module (230) are respectively provided on both sides of the diagonal of the calibration platform (210) of the electrode calibration mechanism (200), and the first alignment module (220) and the second alignment module (230) can move alternately in the horizontal direction; A negative pressure adsorption mechanism (300) is connected to the negative pressure hole (211), and the negative pressure adsorption mechanism (300) can control the pressure of the negative pressure hole (211); A robotic arm (400) is mounted on the frame (100) and is equipped with a suction cup (401) for picking up and placing electrode sheets; The negative pressure adsorption mechanism (300) includes an adjustment module (310) and a flow distribution module (320); the adjustment module (310) is located at the lower end of the calibration platform (210); the adjustment module (310) has n first channels (311) linearly arranged along the X-axis and Y-axis directions, and m shaft holes (312) arranged along the Y-axis direction; all the first channels (311) in the X-axis direction are connected to one of the shaft holes (312); an adjustment shaft (313) is rotatably arranged in the shaft hole (312), and an adjustment hole (314) is provided on the adjustment shaft (313) corresponding to each first channel (311); when the adjustment shaft (313) rotates, the adjustment hole (314) can connect or close the first channel (311); where n≥4; m≥2; The frame (100) includes a correction support frame (110), on which a first base plate (111) is disposed. The first alignment module (220) includes a first cylinder (221), a first connecting block (222), a first slider (223), a second slider (224), and a first connecting rod (225); the first cylinder (221) and the first base plate (111) are fixedly connected; the first slider (223) and the first base plate (111) are slidably connected, and the second slider (224) and the first base plate (111) are slidably connected; one end of the first connecting block (222) is fixedly connected to the output end of the first cylinder (221), and the other end of the first connecting block (222) is fixedly connected to the first slider (223); a first guide groove (226) is provided on the second slider (224), one end of the first connecting rod (225) is slidably disposed in the first guide groove (226), and the other end of the first connecting rod (225) is fixedly connected to the first slider (223); The second alignment module (230) includes a second cylinder (231), a second connecting block (232), a third slider (233), a fourth slider (234), and a second connecting rod (235); the second cylinder (231) and the first base plate (111) are fixedly connected; the third slider (233) and the first base plate (111) are slidably connected, and the fourth slider (234) and the first base plate (111) are slidably connected; one end of the second connecting block (232) is fixedly connected to the output end of the second cylinder (231), and the other end of the second connecting block (232) is fixedly connected to the third slider (233); a second guide groove (236) is provided on the fourth slider (234), one end of the second connecting rod (235) is slidably disposed in the second guide groove (236), and the other end of the second connecting rod (235) is fixedly connected to the third slider (233).

2. The semi-solid-state lithium-ion cell stacking correction device according to claim 1, characterized in that, Push plates (240) are respectively provided on the first slider (223), the second slider (224), the third slider (233) and the fourth slider (234), and the push plates (240) are provided with adjustment grooves (241); an elastic pad (250) is provided on one side of the push plate (240), and the elastic pad (250) is fixed in the adjustment groove (241) by locking bolts (251).

3. The semi-solid lithium-ion cell stacking correction device according to claim 1, characterized in that, The axis of the adjustment hole (314) and the axis of the adjustment shaft (313) are perpendicular to each other and do not intersect.

4. The semi-solid lithium-ion cell stacking correction device according to claim 3, characterized in that, The adjusting holes (314) on the adjusting shaft (313) are spirally distributed on the adjusting shaft (313); when the adjusting shaft (313) rotates, the adjusting holes (314) can sequentially connect or close the first channel (311) in the X-axis direction.

5. The semi-solid lithium-ion cell stacking correction device according to claim 4, characterized in that, One end of the adjustment shaft (313) is respectively provided with a drive motor (315) and a coupling (316). The drive motor (315) is fixedly connected to the frame (100) through a motor mounting base (317). The output end of the drive motor (315) is connected to the adjustment shaft (313) through the coupling (316). The drive motors (315) of adjacent adjustment shafts (313) in the Y-axis direction are respectively located on both sides of the adjustment module (310).

6. The semi-solid-state lithium-ion cell stacking correction device according to claim 5, characterized in that, The distribution module (320) is provided with m distribution slots (321) along the Y-axis direction, and each distribution slot (321) is connected to all the first channels (311) in the X-axis direction; an air inlet pipe (322) is provided at the lower end of the distribution slot (321), and the air inlet pipe (322) is connected to the negative pressure mechanism.

7. The semi-solid-state lithium-ion cell stacking correction device according to claim 1, characterized in that, The robotic arm (400) includes a second base plate (410), a first lead screw (420), a mounting plate (430), a second motor (440), a first lifting module (450), and a second lifting module (460). The second base plate (410) is fixedly connected to the frame (100), the first lead screw (420) is rotatably connected to the second base plate (410), and one end of the first lead screw (420) is drivenly connected to the second motor (440). The mounting plate (430) is slidably connected to the second base plate (410) in the horizontal direction and threadedly connected to the first lead screw (420). The first lifting module (450) and the second lifting module (460) are respectively fixedly connected to the mounting plate (430).

8. The semi-solid-state lithium-ion cell stacking correction device according to claim 7, characterized in that, Both the first lifting module (450) and the second lifting module (460) are equipped with a third motor (461), a second lead screw (462), a lifting plate (463), and a fixed adjustment seat (464). The third motor (461) is fixedly connected to the mounting plate (430), the second lead screw (462) is rotatably connected to the mounting plate (430), and one end of the second lead screw (462) is drivenly connected to the third motor (461). The lifting plate (463) is slidably connected to the mounting plate (430) in the vertical direction, the lifting plate (463) is threadedly connected to the second lead screw (462), the fixed adjustment seat (464) is fixedly connected to the lifting plate (463), and the suction cup (401) is installed on the fixed adjustment seat (464).

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