High-speed lamination equipment

Abstract

The invention discloses high-speed lamination equipment. Comprising a positive and negative pole piece feeding device, a positive and negative pole piece die cutting device, a die cutting discharging manipulator, a positive and negative pole piece transferring device, a positive and negative pole piece separating device, a first lamination device, a second lamination device, a negative pole single-sided piece transferring device, a first partition plate feeding device, a second partition plate feeding device, a first discharging manipulator and a second discharging manipulator, the device comprises a first diaphragm separation device, a second diaphragm separation device, a first hot pressing device, a second hot pressing device, a first partition plate separation device, a second partition plate separation device, a first spot ironing platform, a second spot ironing platform, a first transfer manipulator, a second transfer manipulator, a first appearance CCD detection device, a second appearance CCD detection device and a first NG product collection device. A second NG product collecting device; and a battery cell discharging logistics line. The lamination device is high in lamination efficiency, high in automation degree and capable of greatly reducing the labor cost and improving the production benefit.

Description

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 29, 2024, with application number 2024117350449 and invention name “A high-speed stacking device”. Technical Field

[0002] The present invention relates to the technical field of battery manufacturing, and in particular to a high-speed lamination device. Background Art

[0003] At present, lithium-ion batteries are widely used in consumer electronics, new energy vehicles and energy storage fields. With the rapid development of the application market and the continuous improvement of users' requirements for products, how to produce lithium-ion batteries with good safety performance, high specific energy, long cycle life and low cost has become an important research direction in the field of lithium-ion batteries.

[0004] Lithium-ion batteries can be divided into two types based on their manufacturing method: wound and laminated. Wound batteries have fast processing speeds and high efficiency, but they have the following drawbacks: 1. Wound batteries have certain requirements for the flexibility of the electrode sheets, resulting in low electrode sheet surface density and limiting the energy density of the single battery; 2. The reaction at the bend of the electrode sheet in wound batteries is different from that at other locations, resulting in poor electrode reaction uniformity, affecting performance and even posing a safety hazard; 3. In order to completely wrap the positive electrode with the negative electrode, the negative electrode sheet of the wound battery has an inactive area that does not provide capacity, reducing the battery's energy density. In comparison, laminated batteries have better electrode reaction uniformity and are safer, allowing the electrode sheet to be coated thicker, thereby increasing the battery's energy density.

[0005] Existing lamination equipment has the problems of slow lamination speed and low efficiency, which prolongs the production cycle and increases production costs. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-speed lamination device.

[0007] The technical solutions of the present invention are as follows: A high-speed lamination device, comprising: a positive electrode sheet supply assembly configured to supply a series of individual positive electrode sheets along a supply direction; a negative electrode sheet supply assembly, disposed opposite to the positive electrode sheet supply assembly with respect to the supply direction, and configured to supply a series of single negative electrode sheets along the supply direction; a positive electrode sheet separating device extending in a direction perpendicular to the supply direction, disposed downstream of the positive electrode sheet supply assembly, and configured to receive a series of individual positive electrode sheets from the positive electrode sheet supply assembly; a negative electrode sheet separating device extending in a direction perpendicular to the supply direction, disposed downstream of the negative electrode sheet supply assembly, and configured to receive a series of individual negative electrode sheets from the negative electrode sheet supply assembly; a first laminating device, disposed between the positive electrode sheet laminating device and the negative electrode sheet laminating device and located on the same side as the positive electrode sheet supply assembly, the first laminating device being configured to receive a single positive electrode sheet from the positive electrode sheet laminating device and a single negative electrode sheet from the negative electrode sheet laminating device, and to stack the positive and negative electrode sheets and the separator together to form a battery cell; The second lamination device is arranged between the positive electrode sheet lamination device and the negative electrode sheet lamination device, and is located on the same side as the negative electrode sheet supply assembly. The second lamination device is configured to receive a single positive electrode sheet from the positive electrode sheet lamination device and a single negative electrode sheet from the negative electrode sheet lamination device, and stack the positive and negative electrode sheets and the diaphragm together to form a battery cell.

[0008] Furthermore, the positive electrode sheet supply assembly includes: a positive electrode sheet feeding device configured to supply a positive electrode sheet strip; a positive electrode sheet die-cutting device extending along the supply direction, disposed downstream of the positive electrode sheet feeding device, and configured to cut the positive electrode sheet strip into a series of individual positive electrode sheets; A positive electrode sheet transfer device extends along the supply direction, is disposed downstream of the positive electrode sheet die-cutting device, and is configured to receive a series of individual positive electrode sheets. The positive electrode sheet separating device is configured to receive a series of individual positive electrode sheets from the positive electrode sheet transfer device. The negative electrode sheet supply components include: a negative electrode sheet feeding device configured to supply a negative electrode sheet strip; a negative electrode sheet die-cutting device extending along the supply direction, disposed downstream of the negative electrode sheet feeding device, and configured to cut the negative electrode sheet strip into a series of individual negative electrode sheets; a negative electrode sheet transfer device extending along the supply direction, disposed downstream of the negative electrode sheet die-cutting device, and configured to receive a series of individual negative electrode sheets; and the negative electrode sheet separating device is configured to receive a series of individual negative electrode sheets from the negative electrode sheet transfer device; The lamination equipment also includes a die-cutting and discharging robot, which extends in a direction perpendicular to the supply direction and is located above the positive electrode sheet transfer device and the negative electrode sheet transfer device. The die-cutting and discharging robot is configured to transfer a series of single positive electrode sheets from the positive electrode sheet die-cutting device to the positive electrode sheet transfer device, and transfer a series of single negative electrode sheets from the negative electrode sheet die-cutting device to the negative electrode sheet transfer device.

[0009] Furthermore, the lamination equipment also includes a negative single-sided sheet transfer device, which extends in a direction perpendicular to the supply direction, is arranged adjacent to the negative electrode sheet separation device, and is configured to transfer the negative single-sided sheet to the negative electrode sheet separation device, and then transport it to the first lamination device and the second lamination device through the negative electrode sheet separation device to wrap the battery cell.

[0010] Furthermore, the lamination device further comprises: a first separator loading device, arranged on the same side as the first lamination device; The second separator loading device is arranged on the same side as the second stacking device. The first separator loading device and the second separator loading device are configured to respectively transport separators to the first stacking device and the second stacking device to separate different battery cells.

[0011] Furthermore, the lamination device further comprises: a first unloading robot and a first diaphragm separation device, wherein the first unloading robot is arranged downstream of the first lamination device and above the first diaphragm separation device, and is configured to transfer the laminated battery cells to the first diaphragm separation device to separate the lower diaphragm; The second unloading robot and the second diaphragm separation device are arranged downstream of the second stacking device and above the second diaphragm separation device, and are configured to transfer the battery cells after stacking to the second diaphragm separation device to separate the lower diaphragm.

[0012] Furthermore, the lamination equipment also includes a first hot pressing device and a second hot pressing device. The first hot pressing device is arranged on the same side as the first blanking robot, and is configured to receive the separated battery cells from the first diaphragm separation device and compact the battery cells. The second hot pressing device is arranged on the same side as the second blanking robot, and is configured to receive the separated battery cells from the second diaphragm separation device and compact the battery cells.

[0013] Furthermore, the lamination equipment further includes a first separator separation device and a second separator separation device, wherein the first separator separation device is disposed on the same side as the first hot pressing device and is located downstream of the first hot pressing device, and is configured to receive the compacted battery cells from the first hot pressing device and separate the battery cells and separators; The second separator separation device is disposed on the same side as the second hot pressing device and downstream of the second hot pressing device, and is configured to receive the compacted battery cells from the second hot pressing device and separate the battery cells and separators.

[0014] Furthermore, the lamination equipment further includes a first transfer robot, a first spot ironing platform, a first appearance CCD detection device, and a first NG product collection device, which are successively arranged downstream of the first partition separation device; The lamination equipment further includes a second transfer robot, a second hot plate platform, a second appearance CCD detection device, and a second NG product collection device, which are successively arranged downstream of the second partition separation device; After the partitions are separated, the battery cells are transported by the first transfer robot and the second transfer robot to the first spot ironing platform and the second spot ironing platform to iron and press the excess separators of the opposite-sex battery cells together. After the ironing is completed, the battery cells are transferred to the first appearance CCD detection device and the second appearance CCD detection device by the first transfer robot and the second transfer robot to perform appearance defect and size inspection on the battery cells. NG products are placed in the first NG product collection device and the second NG product collection device by the first transfer robot and the second transfer robot for classification and collection. Qualified products are placed on the battery cell unloading logistics line by the first transfer robot and the second transfer robot for transportation to the next process.

[0015] Furthermore, the positive electrode sheet feeding device and the negative electrode sheet feeding device have the same structure, both including a correction bracket and a first reel, a second reel, an exchange belt assembly, a first brush assembly and a cache assembly arranged on the correction bracket, the first reel and the second reel are arranged opposite to each other, and the exchange belt assembly, the first brush assembly and the cache assembly are arranged in sequence along the unwinding direction of the first reel and the second reel.

[0016] Furthermore, the positive electrode sheet die-cutting device and the negative electrode sheet die-cutting device have the same structure, both including a lifting module and a correction module, a die-cutting module and a cutting die arranged on the lifting module. The die-cutting module and the cutting die are arranged on the correction module, and the cutting die cuts the electrode sheet under the action of the die-cutting module.

[0017] Furthermore, the positive electrode sheet transfer device and the negative electrode sheet transfer device both transfer the die-cut electrodes via a belt line.

[0018] Furthermore, the belt line is driven by a main drive motor, a second brush assembly is provided below the belt line, a surface dust removal assembly and an iron removal assembly are provided above the belt line, and the second brush assembly, surface dust removal assembly and iron removal assembly are arranged in sequence along the belt transmission direction.

[0019] Furthermore, the positive electrode sheet separation device and the negative electrode sheet separation device have the same structure, both including a base, a linear motor and a plurality of sheet separation robots. The linear motor is arranged on the base, and the plurality of sheet separation robots are movably arranged on the linear motor. Each sheet separation robot is provided with two suction cup positions, and the electrode pieces are transferred by suction of the suction cups. A plurality of electrode caching platforms are provided between the first stacking device and the second stacking device for caching the electrode pieces during the sheet separation transfer process.

[0020] Furthermore, the first lamination device and the second lamination device have the same structure, both including a positive pole sheet correction assembly, a negative pole sheet correction assembly, a lamination table and a lamination robot. The lamination table is arranged between the positive pole sheet correction assembly and the negative pole sheet correction assembly. The lamination robot is provided with two and is movably arranged above the positive pole sheet correction assembly, the lamination table and the negative pole sheet correction assembly.

[0021] Furthermore, the positive pole piece correction assembly and the negative pole piece correction assembly have the same structure, both including an X-axis correction module, a Y-axis correction module and a θ correction motor. The Y-axis correction module is movably arranged on the X-axis correction module, and the θ correction motor is movably arranged on the Y-axis correction module. The pole piece is placed on the θ correction motor for correction in three directions.

[0022] Furthermore, the negative electrode single-sided sheet transfer device includes a negative electrode single-sided sheet belt line, a single-sided sheet handling robot, a single-sided sheet feeding robot and a single-sided sheet buffer belt. The single-sided sheet buffer belt is arranged on one side of the negative electrode single-sided sheet belt line. The single-sided sheet handling robot and the single-sided sheet feeding robot are movably arranged on the negative electrode single-sided sheet belt line. The negative electrode single-sided sheet die-cut by the single-sided sheet making equipment is transported to the negative electrode single-sided sheet belt line by the single-sided sheet handling robot, and then the negative electrode single-sided sheet on the negative electrode single-sided sheet belt line is transported to the single-sided sheet buffer belt by the single-sided sheet feeding robot for transportation by the negative electrode sheet separating device.

[0023] Furthermore, the first hot pressing device and the second hot pressing device have the same structure and are both provided with several hot pressing stations. Each hot pressing station includes a hot pressing servo motor, a guide assembly, a hot pressing upper mold and a hot pressing lower mold. The hot pressing upper mold is movably arranged on the hot pressing lower mold. The hot pressing servo motor is connected to the hot pressing upper mold through the guide assembly. The hot pressing upper mold and the hot pressing lower mold contain heating elements.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the present invention includes a positive electrode sheet feeding device, a negative electrode sheet feeding device, a positive electrode sheet die-cutting device, a negative electrode sheet die-cutting device, a die-cutting discharging robot, a positive electrode sheet transfer device, a negative electrode sheet transfer device, a positive electrode sheet separation device, a negative electrode sheet separation device, a first stacking device, a second stacking device, a negative single-sided sheet transfer device, a first partition feeding device, a second partition feeding device, a first unloading robot, a second unloading robot, a first diaphragm separation device, a second diaphragm separation device, a first hot pressing device, a second hot pressing device, a first partition separation device, a second partition separation device, a first hot pressing platform, a second hot pressing platform, a first transfer robot, a second transfer robot, a first appearance CCD detection device, a second appearance CCD detection device, a first NG product collection device, a second NG product collection device and a battery cell unloading logistics line. The positive electrode sheet feeding device and the negative electrode sheet feeding device are used to feed the positive electrode sheet and the negative electrode sheet respectively. The positive electrode sheet die-cutting device and the negative electrode sheet die-cutting device respectively make the positive electrode sheet and the negative electrode sheet into single small electrode sheets that meet the requirements. After die-cutting, the positive electrode sheet and the negative electrode sheet are placed on the positive electrode sheet transfer device and the negative electrode sheet transfer device respectively by the die-cutting discharging robot to be transferred to the positive electrode sheet separation device and the negative electrode sheet separation device. The positive electrode sheet separation device and the negative electrode sheet separation device are used to cut the positive electrode sheet and the negative electrode sheet. The pole piece separating device transports the positive pole piece and the negative pole piece transported by the positive pole piece transporting device and the negative pole piece transporting device to the first stacking device and the second stacking device on the left and right to stack them with the diaphragm into a battery cell. After the battery cell is completed, the negative pole piece separating device transports the negative single-sided sheet to the first stacking device and the second stacking device to cover the battery cell. The first stacking device and the second stacking device can stack two or more groups of battery cells at the same time. The battery cells are separated by partitions and can be compatible with multiple A group of battery cells with irregular shapes are stacked. After stacking, the battery cells are transferred by the first unloading robot and the second unloading robot to the first diaphragm separation device and the second diaphragm separation device to separate the lower diaphragm. After completion, they are transferred to the first hot pressing device and the second hot pressing device to compact the battery cells. After hot pressing, the battery cells are placed in the first partition separation device and the second partition separation device to separate the battery cells and the partitions. After separation, the battery cells are transferred by the first transfer robot and the second transfer robot to the first hot pressing platform and the second hot pressing platform to hot press the excess diaphragms of the heterogeneous battery cells together to facilitate the subsequent separation of the excess diaphragms. After hot pressing, the battery cells are transferred by the first transfer robot and the second transfer robot to the first appearance CCD detection device and the second appearance CCD detection device to detect the appearance defects and dimensions of the battery cells. The unqualified products are placed in the first NG product collection device and the second NG product collection device for classification and collection, and the qualified products are transferred to the next process through the battery cell unloading logistics line. The stacking efficiency of the present invention is high, the stacking efficiency of a single sheet can be increased to 0.4s, the efficiency of the whole machine is 2PPM higher than the existing equipment, and the degree of automation is high, which can greatly reduce labor costs and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of a high-speed lamination device provided by the present invention; Figure 2 Schematic diagram of the structure of the positive electrode sheet feeding device and the negative electrode sheet feeding device of the present invention; Figure 3 Schematic diagram of the structure of the positive electrode sheet die-cutting device and the negative electrode sheet die-cutting device of the present invention; Figure 4 This is a schematic structural diagram of the belt line of the present invention; Figure 5 It is a schematic structural diagram of the positive electrode sheet separation device and the negative electrode sheet separation device of the present invention; Figure 6 A schematic structural diagram of the first lamination device and the second lamination device of the present invention; Figure 7 Schematic diagram of the structure of the positive electrode piece correction assembly and the negative electrode piece correction assembly of the present invention; Figure 8 A schematic structural diagram of the first hot pressing device and the second hot pressing device of the present invention; Figure 9 This is a workflow diagram of a high-speed lamination device provided by the present invention.

[0027] In the picture: 1. Positive electrode sheet feeding device; 2. Negative electrode sheet feeding device; 3. Positive electrode sheet die-cutting device; 4. Negative electrode sheet die-cutting device; 5. Die-cutting discharging robot; 6. Positive electrode sheet transfer device; 7. Negative electrode sheet transfer device; 8. Positive electrode sheet separation device; 9. Negative electrode sheet separation device; 10. First lamination device; 11. Second lamination device; 12. Negative single-sided sheet transfer device; 13. First separator feeding device; 14. Second separator feeding device; 15. First unloading robot; 16. Second unloading robot; 17. First Diaphragm separation device; 18. Second diaphragm separation device; 19. First hot pressing device; 20. Second hot pressing device; 21. First separator separation device; 22. Second separator separation device; 23. First hot pressing platform; 24. Second hot pressing platform; 25. First transfer robot; 26. Second transfer robot; 27. First appearance CCD inspection device; 28. Second appearance CCD inspection device; 29. ​​First NG product collection device; 30. Second NG product collection device; 31. Cell unloading logistics line; 32. Electrode buffer platform; 101, deviation-correcting bracket; 102, first reel; 103, second reel; 104, exchange belt assembly; 105, first brush assembly; 106, buffer assembly; 301, lifting module; 302, deviation correction module; 303, die-cutting module; 304, knife die; 601, belt line; 602, main drive motor; 603, second brush assembly; 604, surface dust removal assembly; 605, iron removal assembly; 801, marble base; 802, linear motor; 803, slicing robot; 804, suction cup; 1001, positive electrode piece deviation correction assembly; 1002, negative electrode piece deviation correction assembly; 1003, stacking table; 1004, stacking robot; 10001, X-axis deviation correction module; 10002, Y-axis deviation correction module; 10003, θ deviation correction motor; 1201, negative electrode single-sided sheet belt line; 1202, single-sided sheet handling robot; 1203, single-sided sheet feeding robot; 1204, single-sided sheet buffer belt; 1901. Hot pressing servo motor; 1902. Guide assembly; 1903. Hot pressing upper die; 1904. Hot pressing lower die. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0030] Example See also Figure 1 This embodiment provides a high-speed lamination device, which includes a positive electrode sheet supply assembly configured to supply a series of individual positive electrode sheets along a supply direction; and a negative electrode sheet supply assembly, disposed opposite the positive electrode sheet supply assembly relative to the supply direction, configured to supply a series of individual negative electrode sheets along the supply direction. The positive electrode sheet supply assembly includes a positive electrode sheet feeding device 1, a positive electrode sheet die-cutting device 3, and a positive electrode sheet transfer device 6. The negative electrode sheet supply assembly includes a negative electrode sheet feeding device 2, a negative electrode sheet die-cutting device 4, and a negative electrode sheet transfer device 7.

[0031] The stacking equipment also includes a die-cutting and discharging robot 5, a positive electrode sheet separating device 8, a negative electrode sheet separating device 9, a first stacking device 10, a second stacking device 11, a negative single-sided sheet transfer device 12, a first partition loading device 13, a second partition loading device 14, a first unloading robot 15, a second unloading robot 16, a first diaphragm separation device 17, a second diaphragm separation device 18, a first hot pressing device 19, a second hot pressing device 20, a first partition separation device 21, a second partition separation device 22, a first hot pressing platform 23, a second hot pressing platform 24, a first transfer robot 25, a second transfer robot 26, a first appearance CCD detection device 27, a second appearance CCD detection device 28, a first NG product collection device 29, a second NG product collection device 30 and a battery cell unloading logistics line 31.

[0032] The positive electrode sheet feeding device 1 is arranged on one side of the positive electrode sheet die-cutting device 3, and is used to provide positive electrode sheets, which are then cut into individual small positive electrode sheets by the positive electrode sheet die-cutting device 3.

[0033] The negative electrode sheet feeding device 2 is arranged on one side of the negative electrode sheet die-cutting device 4 and is used to provide negative electrode sheets, which are then cut into individual small negative electrode sheets by the negative electrode sheet die-cutting device 4 .

[0034] The die-cutting discharge robot 5 is arranged between the positive electrode sheet die-cutting device 3 and the negative electrode sheet die-cutting device 4, and is located above the input end of the positive electrode sheet transfer device 6 and the negative electrode sheet transfer device 7, and is used to transport the die-cut positive electrode small sheets and negative electrode small sheets to the positive electrode sheet transfer device 6 and the negative electrode sheet transfer device 7 for transfer.

[0035] The positive electrode sheet separating device 8 is arranged corresponding to the output end of the positive electrode sheet transferring device 6, and the negative electrode sheet separating device 9 is arranged corresponding to the output end of the negative electrode sheet transferring device 7. The first stacking device 10 and the second stacking device 11 are relatively arranged between the positive electrode sheet separating device 8 and the negative electrode sheet separating device 9. The positive electrode sheet separating device 8 and the negative electrode sheet separating device 9 are respectively transferred to the first stacking device 10 and the second stacking device 11 on the positive electrode sheet transferring device 6 and the negative electrode sheet transferring device 7, and then the positive and negative electrode sheets and the diaphragm are stacked together through the first stacking device 10 and the second stacking device 11 to form a battery cell.

[0036] The negative electrode single-sided sheet transfer device 12 is arranged on one side of the negative electrode sheet separation device 9, and is used to transfer the negative electrode single-sided sheet to the negative electrode sheet separation device 9, and then transport it to the first lamination device 10 and the second lamination device 11 through the negative electrode sheet separation device 9 to coat the battery cell.

[0037] The first separator loading device 13 is arranged on one side of the first lamination device 10, and the second separator loading device 14 is arranged on one side of the second lamination device 11, for transporting separators to the first lamination device 10 and the second lamination device 11 to separate different battery cells.

[0038] The first blanking robot 15 is arranged between the first stacking device 10 and the first partition separation device 21, and is located above the first diaphragm separation device 17. The first hot pressing device 19 is arranged on one side of the first blanking robot 15. The second blanking robot 16 is arranged between the second stacking device 11 and the second partition separation device 22, and is located above the second diaphragm separation device 18. The second hot pressing device 20 is arranged on one side of the second blanking robot 16. After the stacking is completed, the battery cell is transferred to the first diaphragm separation device 17 and the second diaphragm separation device 18 through the first blanking robot 15 and the second blanking robot 16 to separate the lower diaphragm. After completion, it is transferred to the first hot pressing device 19 and the second hot pressing device 20 to compact the battery cell. After the hot pressing is completed, the battery cell is placed in the first partition separation device 21 and the second partition separation device 22 to separate the battery cell and the partition.

[0039] The first transfer robot 25 is set between the first partition separation device 21, the first spot ironing platform 23, the first appearance CCD detection device 27, the first NG product collection device 29 and the battery cell unloading logistics line 31. The second transfer robot 26 is set between the second partition separation device 22, the second spot ironing platform 24, the second appearance CCD detection device 28, the second NG product collection device 30 and the battery cell unloading logistics line 31. The battery cells after the partition separation are transported by the first transfer robot 25 and the second transfer robot 26 to the first spot ironing platform 23 and the second spot ironing platform 24. The excess diaphragms of the opposite sex battery cells are pressed together by ironing. After the ironing is completed, they are transferred to the first appearance CCD detection device 27 and the second appearance CCD detection device 28 through the first transfer robot 25 and the second transfer robot 26 to perform appearance defect and size inspection on the battery cells. NG products are placed in the first NG product collection device 29 and the second NG product collection device 30 through the first transfer robot 25 and the second transfer robot 26 for classification and collection. Qualified products are placed on the battery cell unloading logistics line 31 through the first transfer robot 25 and the second transfer robot 26 for transportation to the next process.

[0040] Specifically, such as Figure 2 As shown, the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 have the same structure, and both include a correction bracket 101 and a first reel 102, a second reel 103, a swap belt assembly 104, a first brush assembly 105, and a buffer assembly 106 arranged on the correction bracket 101. The first reel 102 and the second reel 103 are arranged opposite each other, and the other reel is used as a spare. The belt is changed by the swap belt assembly 104. The swap belt assembly 104, the first brush assembly 105, and the buffer assembly 106 are arranged in sequence along the unwinding direction of the first reel 102 and the second reel 103. The first brush assembly 105 performs a brush dust removal process on the electrode, and the unwinding tension is controlled by the buffer assembly 106. The correction bracket 101 is used to correct the deviation as a whole to ensure the discharge accuracy.

[0041] Specifically, such as Figure 3 As shown, the positive electrode die-cutting device 3 and the negative electrode die-cutting device 4 have the same structure, both including a lifting module 301 and a correction module 302, a die-cutting module 303 and a knife die 304 arranged on the lifting module 301. The die-cutting module 303 and the knife die 304 are arranged on the correction module 302, and precision correction is performed under the action of the correction module 302. The knife die 304 cuts the electrode under the action of the die-cutting module 303.

[0042] The positive electrode sheet transport device 6 and the negative electrode sheet transport device 7 both transport the die-cut electrodes via the belt line 601. Figure 4As shown, the belt line 601 is driven by a main drive motor 602, a second brush assembly 603 is provided below the belt line 601, and a surface dust removal assembly 604 and an iron removal assembly 605 are provided above the belt line 601. The second brush assembly 603, the surface dust removal assembly 604, and the iron removal assembly 605 are arranged in sequence along the belt transmission direction. The second brush assembly 603 is used to clean the dust on the surface of the belt, and the surface dust removal assembly 604 and the iron removal assembly 605 are used to remove impurities on the surface of the pole piece on the belt.

[0043] Specifically, such as Figure 5 As shown, the positive electrode sheet slicing device 8 and the negative electrode sheet slicing device 9 have the same structure, both including a marble base 801, a linear motor 802 and a plurality of slicing robots 803. The linear motor 802 is arranged on the marble base 801, and the plurality of slicing robots 803 are movably arranged on the linear motor 802. Each slicing robot 803 is provided with two suction cup positions, and the electrode transfer is performed by adsorption of the suction cup 804.

[0044] A plurality of electrode cache platforms 32 are provided between the first lamination device 10 and the second lamination device 11 for caching the electrode pieces during the slicing transfer process.

[0045] Specifically, such as Figure 6 As shown, the first lamination device 10 and the second lamination device 11 have the same structure, both including a positive pole piece deviation correction component 1001, a negative pole piece deviation correction component 1002, a lamination platform 1003 and a lamination robot 1004. The lamination platform 1003 is arranged between the positive pole piece deviation correction component 1001 and the negative pole piece deviation correction component 1002. The lamination robot 1004 has two and is movably arranged above the positive pole piece deviation correction component 1001, the lamination platform 1003 and the negative pole piece deviation correction component 1002. Figure 7 As shown, the positive electrode piece correction component 1001 and the negative electrode piece correction component 1002 have the same structure, both including an X-axis correction module 10001, a Y-axis correction module 10002 and a θ correction motor 10003. The Y-axis correction module 10002 is movably arranged on the X-axis correction module 10001, and the θ correction motor 10003 is movably arranged on the Y-axis correction module 10002. The pole piece is placed on the θ correction motor 10003 for precision correction in three directions, so that the pole piece enters the lamination table 1 003 meets the position accuracy requirements and improves the cell coverage accuracy. At the same time, the X-axis correction module 10001 can actively translate the material to improve the handling efficiency. The corrected pole piece is then transported to the stacking table 1003 for stacking by the stacking robot 1004. The diaphragm swing roller swings left and right to form a Z-shaped stacking to cover the pole piece. Since the stacking table 1003 is stationary during this process, the accuracy loss problem of large inertia moving parts is reduced, and the cell coverage is improved from the existing ±0.15mm to ±0.1mm.

[0046] Among them, the negative electrode single-sided sheet transfer device 12 includes a negative electrode single-sided sheet belt line 1201, a single-sided sheet conveying robot 1202, a single-sided sheet feeding robot 1203 and a single-sided sheet buffer belt 1204. The single-sided sheet buffer belt 1204 is arranged on one side of the negative electrode single-sided sheet belt line 1201, and the single-sided sheet conveying robot 1202 and the single-sided sheet feeding robot 1203 are movably arranged on the negative electrode single-sided sheet belt line 1201. The negative electrode single-sided sheet die-cut by the single-sided sheet making equipment is conveyed to the negative electrode single-sided sheet belt line 1201 by the single-sided sheet conveying robot 1202, and then the negative electrode single-sided sheet on the negative electrode single-sided sheet belt line 1201 is conveyed to the single-sided sheet buffer belt 1204 by the single-sided sheet feeding robot 1203 for conveyance by the negative electrode sheet separating device 9.

[0047] Specifically, such as Figure 8 As shown, the first hot pressing device 19 and the second hot pressing device 20 have the same structure and are both equipped with a number of hot pressing stations. Each hot pressing station includes a hot pressing servo motor 1901, a guide assembly 1902, a hot pressing upper mold 1903 and a hot pressing lower mold 1904. The hot pressing upper mold 1903 is movably arranged on the hot pressing lower mold 1904. The hot pressing servo motor 1901 is connected to the hot pressing upper mold 1903 through the guide assembly 1902. The hot pressing upper mold 1903 and the hot pressing lower mold 1904 contain heating elements. The hot pressing servo motor 1901 provides hot pressing pressure, the guide assembly 1902 provides guidance, and the heating element heats the hot pressing upper mold 1903 and the hot pressing lower mold 1904. Under the driving action of the hot pressing servo motor 1901, the hot pressing function is realized, which can better compress and shape the battery cell.

[0048] The specific work process is as follows Figure 9As shown: the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 are used to unwind the positive electrode and the negative electrode respectively; the positive electrode sheet die-cutting device 3 and the negative electrode sheet die-cutting device 4 respectively make the positive electrode sheet and the negative electrode sheet into single small electrode sheets that meet the requirements; after die-cutting, the small positive electrode sheet and the small negative electrode sheet are placed on the positive electrode sheet transporting device 6 and the negative electrode sheet transporting device 7 respectively by the die-cutting discharging robot 5 for transporting to the positive electrode sheet separating device 8 and the negative electrode sheet separating device 9. The positive electrode sheet separating device 8 and the negative electrode sheet separating device 9 are used to cut the positive electrode sheet and the negative electrode sheet respectively. The sheet separation device 9 transports the positive and negative electrode sheets transported by the positive electrode sheet transport device 6 and the negative electrode sheet transport device 7 to the first and second stacking devices 10 and 11 on the left and right respectively for sheet correction and stacking; after the battery cell is completed, the negative electrode sheet separation device 9 transports the negative single-sided sheet to the first stacking device 10 and the second stacking device 11 to cover the battery cell. The first stacking device 10 and the second stacking device 11 can stack two or more groups of battery cells at the same time, and the battery cells are separated by partitions; after stacking is completed The battery cells are transferred to the first diaphragm separation device 17 and the second diaphragm separation device 18 by the first unloading robot 15 and the second unloading robot 16 to separate and discharge the lower diaphragm; after separation, they are transferred to the first hot pressing device 19 and the second hot pressing device 20 to compact the battery cells; after hot pressing, the battery cells are placed in the first diaphragm separation device 17 and the second diaphragm separation device 18 to separate the battery cells and the partitions; after separation, the battery cells are transferred to the first hot pressing platform 2 by the first unloading robot 15 and the second unloading robot 16 3 and the second spot ironing platform 24 press the excess diaphragms of the opposite-sex battery cells together to facilitate the subsequent separation of the excess diaphragms; after the spot ironing is completed, the first transfer robot 25 and the second transfer robot 26 transfer the battery cells to the first appearance CCD inspection device 27 and the second appearance CCD inspection device 28 for appearance defect and size inspection, and the unqualified products are placed in the first NG product collection device 29 and the second NG product collection device 30 for classification and collection, and the qualified products are transported to the next process through the battery cell unloading logistics line 31.

[0049] In summary, the high-speed lamination equipment has the following characteristics: (1) High stacking efficiency. The efficiency of a single piece can be increased to 0.4s. The efficiency of the whole machine is 2PPM higher than that of existing equipment. It also has a high degree of automation, which can greatly reduce labor costs and improve production efficiency. (2) The stacking platform of the stacking device is stationary and is completed by the swing of the diaphragm, which improves efficiency and coverage accuracy; (3) The pole piece deviation correction component of the lamination device can actively feed the material, which improves the handling efficiency; (4) The lower diaphragm is discharged before hot pressing to prevent the diaphragm from sticking to the hot pressing device during hot pressing, and the accumulation of diaphragm material affects the appearance of the subsequent battery cell after hot pressing; (5) CCD appearance inspection is performed before discharging, which enables waste material identification and early discharge.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-speed lamination device for manufacturing battery cells, characterized in that: The lamination equipment includes: a positive electrode sheet supply assembly configured to supply a series of individual positive electrode sheets along a supply direction; a negative electrode sheet supply assembly, disposed opposite to the positive electrode sheet supply assembly with respect to the supply direction, and configured to supply a series of single negative electrode sheets along the supply direction; a positive electrode sheet separating device extending in a direction perpendicular to the supply direction, disposed downstream of the positive electrode sheet supply assembly, and configured to receive a series of individual positive electrode sheets from the positive electrode sheet supply assembly; a negative electrode sheet separating device extending in a direction perpendicular to the supply direction, disposed downstream of the negative electrode sheet supply assembly, and configured to receive a series of individual negative electrode sheets from the negative electrode sheet supply assembly; a first laminating device, disposed between the positive electrode sheet laminating device and the negative electrode sheet laminating device and located on the same side as the positive electrode sheet supply assembly, the first laminating device being configured to receive a single positive electrode sheet from the positive electrode sheet laminating device and a single negative electrode sheet from the negative electrode sheet laminating device, and to stack the positive and negative electrode sheets and the separator together to form a battery cell; The second lamination device is arranged between the positive electrode sheet lamination device and the negative electrode sheet lamination device, and is located on the same side as the negative electrode sheet supply assembly. The second lamination device is configured to receive a single positive electrode sheet from the positive electrode sheet lamination device and a single negative electrode sheet from the negative electrode sheet lamination device, and stack the positive and negative electrode sheets and the diaphragm together to form a battery cell.

2. The lamination device according to claim 1, characterized in that The positive electrode sheet supply assembly includes: a positive electrode sheet feeding device configured to supply a positive electrode sheet strip; a positive electrode sheet die-cutting device extending along the supply direction, disposed downstream of the positive electrode sheet feeding device, and configured to cut the positive electrode sheet strip into a series of individual positive electrode sheets; A positive electrode sheet transfer device extends along the supply direction, is disposed downstream of the positive electrode sheet die-cutting device, and is configured to receive a series of individual positive electrode sheets. The positive electrode sheet separating device is configured to receive a series of individual positive electrode sheets from the positive electrode sheet transfer device. The negative electrode sheet supply components include: a negative electrode sheet feeding device configured to supply a negative electrode sheet strip; a negative electrode sheet die-cutting device extending along the supply direction, disposed downstream of the negative electrode sheet feeding device, and configured to cut the negative electrode sheet strip into a series of individual negative electrode sheets; a negative electrode sheet transfer device extending along the supply direction, disposed downstream of the negative electrode sheet die-cutting device, and configured to receive a series of individual negative electrode sheets; and the negative electrode sheet separating device is configured to receive a series of individual negative electrode sheets from the negative electrode sheet transfer device; The lamination equipment also includes a die-cutting and discharging robot, which extends in a direction perpendicular to the supply direction and is located above the positive electrode sheet transfer device and the negative electrode sheet transfer device. The die-cutting and discharging robot is configured to transfer a series of single positive electrode sheets from the positive electrode sheet die-cutting device to the positive electrode sheet transfer device, and transfer a series of single negative electrode sheets from the negative electrode sheet die-cutting device to the negative electrode sheet transfer device.

3. The lamination device according to claim 2, characterized in that The lamination equipment also includes a negative single-sided sheet transfer device, which extends in a direction perpendicular to the supply direction, is arranged adjacent to the negative electrode sheet separation device, and is configured to transfer the negative single-sided sheet to the negative electrode sheet separation device, and then transport it to the first lamination device and the second lamination device through the negative electrode sheet separation device to wrap the battery cell.

4. The lamination device according to claim 3, characterized in that The lamination device also includes: a first separator loading device, arranged on the same side as the first lamination device; The second separator loading device is arranged on the same side as the second stacking device. The first separator loading device and the second separator loading device are configured to respectively transport separators to the first stacking device and the second stacking device to separate different battery cells.

5. The lamination device according to claim 4, characterized in that The lamination device also includes: a first unloading robot and a first diaphragm separation device, wherein the first unloading robot is arranged downstream of the first lamination device and above the first diaphragm separation device, and is configured to transfer the laminated battery cells to the first diaphragm separation device to separate the lower diaphragm; The second unloading robot and the second diaphragm separation device are arranged downstream of the second stacking device and above the second diaphragm separation device, and are configured to transfer the battery cells after stacking to the second diaphragm separation device to separate the lower diaphragm.

6. The lamination device according to claim 5, characterized in that The lamination equipment also includes a first hot pressing device and a second hot pressing device. The first hot pressing device is arranged on the same side as the first blanking robot, and is configured to receive the separated battery cells from the first diaphragm separation device and compact the battery cells. The second hot pressing device is arranged on the same side as the second blanking robot, and is configured to receive the separated battery cells from the second diaphragm separation device and compact the battery cells.

7. The lamination device according to claim 6, characterized in that The lamination equipment further includes a first separator separating device and a second separator separating device, wherein the first separator separating device is disposed on the same side as the first hot pressing device and is located downstream of the first hot pressing device, and is configured to receive the compacted battery cells from the first hot pressing device and separate the battery cells and separators; The second separator separation device is disposed on the same side as the second hot pressing device and downstream of the second hot pressing device, and is configured to receive the compacted battery cells from the second hot pressing device and separate the battery cells and separators.

8. The lamination device according to claim 7, characterized in that The lamination equipment further includes a first transfer robot, a first spot ironing platform, a first appearance CCD detection device, and a first NG product collection device, which are successively arranged downstream of the first partition separation device; The lamination equipment further includes a second transfer robot, a second hot plate platform, a second appearance CCD detection device, and a second NG product collection device, which are successively arranged downstream of the second partition separation device; After the partitions are separated, the battery cells are transported by the first transfer robot and the second transfer robot to the first spot ironing platform and the second spot ironing platform to iron and press the excess separators of the opposite-sex battery cells together. After the ironing is completed, the battery cells are transferred to the first appearance CCD detection device and the second appearance CCD detection device by the first transfer robot and the second transfer robot to perform appearance defect and size inspection on the battery cells. NG products are placed in the first NG product collection device and the second NG product collection device by the first transfer robot and the second transfer robot for classification and collection. Qualified products are placed on the battery cell unloading logistics line by the first transfer robot and the second transfer robot for transportation to the next process.

9. The lamination device according to claim 8, characterized in that: The positive electrode sheet feeding device and the negative electrode sheet feeding device have the same structure, both including a correction bracket and a first reel, a second reel, an exchange belt assembly, a first brush assembly and a cache assembly arranged on the correction bracket. The first reel and the second reel are arranged opposite to each other, and the exchange belt assembly, the first brush assembly and the cache assembly are arranged in sequence along the unwinding direction of the first reel and the second reel.

10. The lamination device according to claim 8, characterized in that: The positive electrode sheet die-cutting device and the negative electrode sheet die-cutting device have the same structure, both including a lifting module and a correction module, a die-cutting module and a cutting die arranged on the lifting module. The die-cutting module and the cutting die are arranged on the correction module, and the cutting die cuts the electrode sheet under the action of the die-cutting module.

11. The lamination device according to claim 8, characterized in that: The positive electrode sheet transfer device and the negative electrode sheet transfer device both transfer the die-cut electrodes via a belt line.

12. The lamination device according to claim 11, characterized in that: The belt line is driven by a main drive motor. A second brush assembly is provided below the belt line, and a surface dust removal assembly and an iron removal assembly are provided above the belt line. The second brush assembly, the surface dust removal assembly and the iron removal assembly are arranged in sequence along the belt transmission direction.

13. The lamination device according to claim 8, characterized in that: The positive electrode sheet separation device and the negative electrode sheet separation device have the same structure, both including a base, a linear motor and a plurality of sheet separation robots. The linear motor is arranged on the base, and the plurality of sheet separation robots are movably arranged on the linear motor. Each sheet separation robot is provided with two suction cup positions, and the electrode pieces are transferred by suction of the suction cups. A plurality of electrode caching platforms are provided between the first stacking device and the second stacking device for caching the electrode pieces during the sheet separation transfer process.

14. The lamination device according to claim 8, characterized in that: The first lamination device and the second lamination device have the same structure, both including a positive pole sheet correction assembly, a negative pole sheet correction assembly, a lamination table and a lamination robot. The lamination table is arranged between the positive pole sheet correction assembly and the negative pole sheet correction assembly. The lamination robot is provided with two and is movably arranged above the positive pole sheet correction assembly, the lamination table and the negative pole sheet correction assembly.

15. The lamination device according to claim 14, characterized in that: The positive pole piece correction assembly and the negative pole piece correction assembly have the same structure, both including an X-axis correction module, a Y-axis correction module and a θ correction motor. The Y-axis correction module is movably arranged on the X-axis correction module, and the θ correction motor is movably arranged on the Y-axis correction module. The pole piece is placed on the θ correction motor for correction in three directions.

16. The lamination device according to claim 8, characterized in that: The negative electrode single-sided sheet transfer device includes a negative electrode single-sided sheet belt line, a single-sided sheet handling robot, a single-sided sheet feeding robot and a single-sided sheet buffer belt. The single-sided sheet buffer belt is arranged on one side of the negative electrode single-sided sheet belt line. The single-sided sheet handling robot and the single-sided sheet feeding robot are movably arranged on the negative electrode single-sided sheet belt line. The negative electrode single-sided sheet die-cut by the single-sided sheet making equipment is transported to the negative electrode single-sided sheet belt line by the single-sided sheet handling robot, and then the negative electrode single-sided sheet on the negative electrode single-sided sheet belt line is transported to the single-sided sheet buffer belt by the single-sided sheet feeding robot for transportation by the negative electrode sheet separating device.

17. The lamination device according to claim 8, characterized in that: The first hot pressing device and the second hot pressing device have the same structure and are both equipped with several hot pressing stations. Each hot pressing station includes a hot pressing servo motor, a guide assembly, a hot pressing upper mold and a hot pressing lower mold. The hot pressing upper mold is movably arranged on the hot pressing lower mold. The hot pressing servo motor is connected to the hot pressing upper mold through the guide assembly. The hot pressing upper mold and the hot pressing lower mold contain heating elements.

Images