Battery cell nondestructive transfer hot press molding machine

Abstract

The utility model discloses a whole structure design realizes to avoid the battery to be affected by external force and cause diaphragm to wrinkle, damage and pole piece misplacement, avoids the electric core to be adhered on the hot pressing plate, ensures the appearance integrity of electric core not to be damaged and ensures the quality of electric core, promotes the reliability and efficiency of carrying lamination type battery, improves the yield of lamination type battery, reduces the loss, reduces the cost, and the lower heating plate is the overall design, can realize the compatible electric core of different size or different specification, and the versatility is strong.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing forming machines, and in particular to a hot pressing forming machine for non-destructive transfer of battery cells. Background Technology

[0002] In the battery cell manufacturing process, the cells need to be placed between upper and lower hot pressing plates on a hot pressing machine for hot pressing. However, existing hot pressing equipment often results in electrode sheets sticking to the upper and lower hot pressing plates, or the entire cell adhering to the lower pressing block, preventing the cells from being completely hot-pressed and even causing cell delamination. This severely impacts the efficiency of the hot pressing operation and the yield rate of the cells. Therefore, commonly used cell hot pressing devices typically have a groove on the lower heating plate, within which a movable square lifting block is installed. A feeding mechanism transfers the cells to the hot pressing device. After hot pressing, the square lifting block on the lower heating plate is raised or lowered, lifting the cells for easy unloading. However, because the lifting block and the hot pressing plate may have inconsistent heights or gaps, this can easily lead to uneven cell thickness or indentations after hot pressing, directly affecting cell quality and yield. Furthermore, because the lifting block needs to generate heat to work in conjunction with the lower hot press plate, the overall compatibility of the lower hot press plate with cell specifications is poor, increasing the operating cost of the equipment. Based on these issues, it is essential to develop a cell-free hot press forming machine that can prevent cells from sticking to the hot press plate, ensure the integrity of the cell appearance, guarantee cell quality, improve the reliability and efficiency of handling stacked batteries, increase the yield of stacked batteries, reduce losses, lower costs, avoid obstacles when a robotic arm handles cells, and prevent the battery from being affected by external forces, resulting in separator wrinkles, damage, or electrode misalignment. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a battery cell non-destructive hot pressing forming machine.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the battery cell non-destructive transfer hot pressing forming machine includes a hot pressing bracket, an upper hot pressing mechanism and a lower hot pressing mechanism. The upper hot pressing mechanism is installed inside the top of the hot pressing bracket, and the lower hot pressing mechanism is located below the upper hot pressing mechanism.

[0005] The upper hot-pressing mechanism includes an upper hot-pressing lifting assembly, an upper heating plate, a safety pin assembly, and a short-circuit test assembly. The upper hot-pressing lifting assembly is installed inside the top of the hot-pressing bracket, and the upper heating plate and the short-circuit test assembly are installed side by side at the bottom of the upper hot-pressing lifting assembly. The upper heating plate presses the battery cell to perform hot-pressing shaping, the short-circuit test assembly performs short-circuit testing on the battery cell, and the safety pin assembly is installed on the upper hot-pressing lifting assembly and is used to lock and fix the upper heating plate.

[0006] The lower hot pressing mechanism includes a sliding base frame, a base plate moving assembly, a base plate, a lower heating plate, two battery cell lifting assemblies, two lifting connecting plates, a film stretching and leveling assembly, two film stretching and tensioning assemblies, and a film stretching mechanism. The base plate moving assembly is mounted on the sliding base frame, the base plate is mounted on the base plate moving assembly, the lower heating plate is mounted on the base plate, the two battery cell lifting assemblies are respectively mounted on two opposite ends of the base plate, the two lifting connecting plates are respectively mounted on the two battery cell lifting assemblies, the film stretching and leveling assembly is mounted on the two lifting connecting plates, one film stretching and tensioning assembly is mounted on the same end of the two lifting connecting plates, and the other film stretching and tensioning assembly is mounted on the other end of the two lifting connecting plates. The two ends of the film stretching mechanism are respectively connected and installed to the two film stretching and tensioning assemblies, and the film stretching and leveling assembly supports the middle part of the film stretching mechanism. A battery cell support plate sliding assembly is also mounted on the base plate, and a base plate locking mechanism for locking and positioning the base plate is also mounted on the sliding base frame.

[0007] Preferably, the upper hot press lifting assembly includes an upper heating plate lifting drive device, a coupling, two connecting buckles, a fixed plate, two lifting movable plates, and at least two first linear guide rails. At least one first linear guide rail is longitudinally installed inside one side wall of the hot press bracket, and at least one first linear guide rail is longitudinally installed inside the other side wall of the hot press bracket. The two lifting movable plates are respectively lifted and slidably installed on the first linear guide rails on the two side walls of the hot press bracket. The fixed plate is horizontally installed on the two lifting movable plates. The two connecting buckles are installed opposite each other on the top of the fixed plate. The upper heating plate lifting drive device is longitudinally installed on the top of the hot press bracket. The coupling is installed on the output end of the upper heating plate lifting drive device and is fastened to the two connecting buckles.

[0008] Preferably, the short-circuit test assembly includes two lifting shafts, two first springs, a mounting guide, and a short-circuit test plate. The mounting guide is mounted on a fixed plate, and the two lifting shafts move longitudinally through both ends of the mounting guide and through the fixed plate. The short-circuit test plate is mounted on the bottom of the two lifting shafts, and the two first springs are respectively sleeved on the two lifting shafts, with both ends of the first springs abutting against the mounting guide and the short-circuit test plate, respectively.

[0009] Specifically, the safety pin assembly includes a pin bearing, a pin, a second linear guide rail, and a pin movement drive device. The pin bearing is mounted on the side wall of the hot press bracket. The second linear guide rail and the pin movement drive device are respectively mounted on the fixed plate. The pin is slidably mounted on the second linear guide rail through a pin seat. The output end of the pin movement drive device is connected and installed with the pin seat.

[0010] Preferably, the membrane leveling assembly includes a first membrane support plate translation drive device, a second membrane support plate translation drive device, four positioning adjustment blocks, a first membrane support plate, and a second membrane support plate. The first and second membrane support plate translation drive devices are respectively mounted on two lifting connecting plates. Two positioning adjustment blocks are respectively mounted on the two output ends of the first membrane support plate translation drive device, and the other two positioning adjustment blocks are respectively mounted on the two output ends of the second membrane support plate translation drive device. The first membrane support plate is connected to the positioning adjustment blocks on the same side of the output ends of the first and second membrane support plate translation drive devices. The second membrane support plate is connected to the positioning adjustment blocks on the other side of the output ends of the first and second membrane support plate translation drive devices. The first membrane support plate has a first guide groove laterally for the membrane to pass through and for supporting the membrane. The second membrane support plate has a second guide groove laterally for the membrane to pass through and for supporting the membrane.

[0011] Preferably, the membrane tensioning assembly includes a linear guide rod mounting plate, a first buffer linear guide rod assembly, a second buffer linear guide rod assembly, a membrane tensioning block, and a membrane clamping block. The linear guide rod mounting plate is installed on the same end of the two lifting connecting plates. The first buffer linear guide rod assembly and the second buffer linear guide rod assembly are respectively longitudinally installed on the linear guide rod mounting plate. The membrane tensioning block is installed on the top of the first buffer linear guide rod assembly and the second buffer linear guide rod assembly. The membrane clamping block mounts the end of the membrane onto the membrane tensioning block.

[0012] Preferably, the cell tray translation assembly includes a third linear guide rail, a limiting block, a cell tray translation drive device, a first support rod connecting block, a second support rod connecting block, and a cell tray. The third linear guide rail and the cell tray translation drive device are installed in parallel on both ends of the base plate. The first support rod connecting block is installed on the output end of the cell tray translation drive device. The second support rod connecting block is slidably installed on the third linear guide rail. Both ends of the cell tray are connected and installed to the first support rod connecting block and the second support rod connecting block, respectively.

[0013] Preferably, the base plate locking mechanism includes a fourth linear guide rail, a base plate limiting block lifting drive device, and a base plate limiting block. The fourth linear guide rail and the base plate limiting block lifting drive device are respectively mounted on the translation base frame. The base plate limiting block is slidably mounted on the fourth linear guide rail. The output end of the base plate limiting block lifting drive device is connected and installed with the base plate limiting block.

[0014] Preferably, a controller or control system is provided for signal control of components such as the upper hot pressing mechanism and the lower hot pressing mechanism. The controller is a PLC programmable logic controller. The PLC programmable logic controller can be a programmable logic controller of model XDS-40T-D, but is not limited thereto.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. Its overall structural design enables it to avoid interference with the gripping robotic arm in handling battery cells, preventing the battery from being affected by external forces, which could cause diaphragm wrinkles, damage, or electrode misalignment; at the same time, it prevents the battery cells from sticking to the lower heating plate, ensuring the integrity of the battery cell's appearance and ensuring its quality, improving the reliability and efficiency of handling stacked batteries, increasing the yield of stacked batteries, reducing losses, and lowering costs; it not only effectively solves the problem of using existing hot pressing equipment After hot pressing the battery cell, the electrode sheets tend to stick to the upper and lower hot pressing plates, or the entire battery cell is attached to the lower pressing block, resulting in low hot pressing efficiency, easy damage to the battery cell appearance, low yield of finished products, high loss, high cost, and problems such as separator wrinkling, damage, and electrode misalignment caused by external forces affecting the battery. It also solves the problem of uneven battery cell thickness or imprints after hot pressing when using commonly used battery cell hot pressing devices, which may result in inconsistent heights or gaps between the lifting block and the hot pressing plate.

[0016] 2. Its lower heating plate is an integral design, which is compatible with battery cells of different sizes or specifications. It is highly versatile and practical, thus solving the problem of poor compatibility of the lower heating plate with battery cell specifications caused by the lifting block needing to have a heating function to work together with the lower heating plate in commonly used battery cell hot pressing devices on the market. Attached Figure Description

[0017] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0018] Figure 1 This is a perspective view of the battery cell non-destructive transfer hot pressing forming machine of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the battery cell non-destructive transfer hot pressing forming machine of this utility model, showing the removal of the lower hot pressing mechanism.

[0020] Figure 3 This is a perspective view of the battery cell non-destructive transfer hot pressing forming machine of this utility model, with the lower hot pressing mechanism removed and a safety pin assembly installed.

[0021] Figure 4 This is a perspective view of the lower hot pressing mechanism of the battery cell non-destructive transfer hot pressing molding machine of this utility model.

[0022] Figure 5 This is a perspective view of the lower hot pressing mechanism of the battery cell non-destructive transfer hot pressing forming machine of this utility model, showing the removal of the base plate moving component and the battery cell lifting component.

[0023] Figure 6 This is a perspective view of the cell tray translation assembly of the cell non-destructive transfer hot pressing forming machine of this utility model.

[0024] Figure 7 This is a perspective view of the base plate locking mechanism of the battery cell non-destructive transfer hot pressing molding machine of this utility model. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0027] Reference Figure 1 As shown, the battery cell non-destructive transfer hot pressing forming machine of this utility model includes a hot pressing bracket 1, an upper hot pressing mechanism 2 and a lower hot pressing mechanism 3. The upper hot pressing mechanism 2 is installed inside the top of the hot pressing bracket 1, and the lower hot pressing mechanism 3 is located below the upper hot pressing mechanism 2.

[0028] Reference Figure 2 and Figure 3 As shown, the upper hot pressing mechanism 2 includes an upper hot pressing lifting assembly 4, an upper heating plate 5, a safety pin assembly 6, and a short-circuit test assembly 7. The upper hot pressing lifting assembly 4 is installed inside the top of the hot pressing bracket 1, and the upper heating plate 5 and the short-circuit test assembly 7 are installed side by side at the bottom of the upper hot pressing lifting assembly 4. The upper heating plate 5 presses the battery cell to perform hot pressing and shaping, the short-circuit test assembly 7 performs short-circuit testing on the battery cell, and the safety pin assembly 6 is installed on the upper hot pressing lifting assembly 4 and is used to lock and fix the upper heating plate 5.

[0029] Reference Figure 4As shown, the lower hot pressing mechanism 3 includes a sliding base frame 30, a base plate moving assembly 31, a base plate 32, a lower heating plate 33, two battery cell lifting assemblies 34, two lifting connecting plates 35, a film stretching and leveling assembly 36, two film stretching and tensioning assemblies 37, and a film stretching assembly 38. The base plate moving assembly 31 is mounted on the sliding base frame 30, the base plate 32 is mounted on the base plate moving assembly 31, the lower heating plate 33 is mounted on the base plate 32, the two battery cell lifting assemblies 34 are respectively mounted on the two opposite ends of the base plate 32, and the two lifting connecting plates 35 are respectively mounted on the two battery cell lifting assemblies. On component 34, a membrane leveling component 36 is mounted on two lifting connecting plates 35, one membrane tensioning component 37 is mounted on the same end of the two lifting connecting plates 35, and the other membrane tensioning component 37 is mounted on the other end of the two lifting connecting plates 35. The two ends of the membrane 38 are respectively connected and installed to the two membrane tensioning components 37, and the membrane leveling component 36 supports the middle part of the membrane 38. The base plate 32 is also equipped with a cell support plate translation component 8, and the translation base frame 30 is also equipped with a base plate locking mechanism 9 for locking and positioning the base plate 32.

[0030] In this embodiment, the base plate moving assembly 31 includes a rodless cylinder and at least two guide rails. The rodless cylinder is mounted on one side of the translation base frame 30, and the at least two guide rails are mounted on the top of the translation base frame 30. The sliding part of the rodless cylinder is connected and installed to the base plate 32. The base plate 32 is slidably mounted on the at least two guide rails, and the rodless cylinder drives the base plate 32 to slide on the at least two guide rails.

[0031] By adopting the above technical solution, the lower heating plate 33 is an integral design, which can be compatible with battery cells 10 of different sizes or specifications. It has strong versatility and practicality, reduces equipment costs, and solves the problem of poor compatibility of the lower heating plate with battery cell specifications caused by the lifting block needing to have a heating function to work together with the lower heating plate in commonly used battery cell hot pressing devices on the market.

[0032] Reference Figure 2 As shown, the upper hot press lifting assembly 4 includes an upper heating plate lifting drive device 40, a coupling 41, two connecting buckles 42, a fixing plate 43, two lifting moving plates 44, and at least two first linear guide rails 45. At least one first linear guide rail 45 is longitudinally installed inside one side wall of the hot press bracket 1, and at least one first linear guide rail 45 is longitudinally installed inside the other side wall of the hot press bracket 1. The two lifting moving plates 44 are respectively lifted and slidably installed on the first linear guide rails 45 on the two side walls of the hot press bracket 1. The fixing plate 43 is horizontally installed on the two lifting moving plates 44. The two connecting buckles 42 are installed opposite each other on the top of the fixing plate 43. The upper heating plate lifting drive device 40 is longitudinally installed on the top of the hot press bracket 1 through the top plate 46. The coupling 41 is installed on the output end of the upper heating plate lifting drive device 40 and the coupling 41 is fastened to the two connecting buckles 42.

[0033] By adopting the above technical solution, the upper heating plate lifting drive device 40 drives the fixed plate 43 to move up and down on the first linear guide rail 45 through the coupling 41 and two connecting buckles 42, and the fixed plate 43 drives the upper heating plate 5 to move up and down.

[0034] In this embodiment, the upper heating plate lifting drive device 40 is preferably a linear reciprocating motor.

[0035] Reference Figure 3 As shown, the short-circuit test assembly 7 includes two lifting shafts 70, two first springs 71, a mounting guide 72, and a short-circuit test plate 73. The mounting guide 72 is mounted on the fixed plate 43. The two lifting shafts 70 move longitudinally through both ends of the mounting guide 72 and through the fixed plate 43. The short-circuit test plate 73 is mounted on the bottom of the two lifting shafts 70. The two first springs 71 are respectively sleeved on the two lifting shafts 70, and the two ends of the first springs 71 respectively abut against the mounting guide 72 and the short-circuit test plate 73.

[0036] By adopting the above technical solution, the descent of the fixing plate 43 drives the short-circuit test plate 73 to press the battery cell for short-circuit testing, and the first spring 71 buffers the downward pressure of the short-circuit test plate 73.

[0037] Reference Figure 2 As shown, the safety pin assembly 6 includes a pin bearing 60, a pin 61, a second linear guide rail 62, and a pin movement drive device 63. The pin bearing 60 is mounted on the side wall of the hot press bracket 1. The second linear guide rail 62 and the pin movement drive device 63 are respectively mounted on the fixed plate 43. The pin 61 is slidably mounted on the second linear guide rail 62 through a pin seat 64. The output end of the pin movement drive device 63 is connected and installed with the pin seat 64.

[0038] By adopting the above technical solution, the pin moving drive device 63 drives the pin seat 64 to slide on the second linear guide rail 62, thereby driving the pin 61 to insert into the pin bearing 60 on the side wall of the hot press bracket 1, so as to lock the upper hot press lifting assembly 4 and the upper heating plate 5 on the hot press bracket 1, avoiding accidents caused by falling during the maintenance of the upper hot press lifting assembly 4 and the upper heating plate 5, which is safe and reliable.

[0039] In this embodiment, the pin movement drive device 63 is preferably a cylinder.

[0040] Reference Figure 5As shown, the cell lifting assembly 34 includes a connecting plate lifting drive device 341, a first guide rod and guide sleeve assembly 342, and a second guide rod and guide sleeve assembly 343. All three assemblies are mounted on a base plate 32. The output end of the connecting plate lifting drive device 341 and the guide rods of the first and second guide rod and guide sleeve assemblies 342 and 343 are connected to the lifting connecting plate 35. In this embodiment, the connecting plate lifting drive device 341 is preferably a cylinder, but it is not limited to this. The structures of the first and second guide rod and guide sleeve assemblies 342 and 343 are common knowledge and will not be explained in detail here.

[0041] Reference Figure 5 As shown, the membrane leveling assembly 36 includes a first membrane support plate translation drive device 361, a second membrane support plate translation drive device 362, four positioning adjustment blocks 363, a first membrane support plate 364, and a second membrane support plate 365. The first membrane support plate translation drive device 361 and the second membrane support plate translation drive device 362 are respectively mounted on two lifting connecting plates 35. Two positioning adjustment blocks 363 are respectively mounted on the two output ends of the first membrane support plate translation drive device 361, and the other two positioning adjustment blocks 363 are respectively mounted on the second membrane support plate translation drive device 365. On the two output ends of 2, the first membrane support plate 364 is connected and installed with the positioning adjustment block 363 on the same side of the output end of the first membrane support plate translation drive device 361 and the second membrane support plate translation drive device 362. The second membrane support plate 365 is connected and installed with the positioning adjustment block 363 on the other side of the output end of the first membrane support plate translation drive device 361 and the second membrane support plate translation drive device 362. The first membrane support plate 364 and the second membrane support plate 365 are respectively provided with a first guide groove 366 and a second guide groove 367 for the membrane 38 to pass through and support the membrane 38.

[0042] By adopting the above technical solution, the first membrane support plate translation drive device 361 and the second membrane support plate translation drive device 362 respectively drive the first membrane support plate 364 and the second membrane support plate 365 to move away from or towards each other, and the first membrane support plate 364 and the second membrane support plate 365 move away from each other to level the membrane 38. The connecting plate lifting drive device 341 drives the lifting connecting plate 35 to lower, thereby driving the battery cell 10 and the film 38 to the lower heating plate 33. The film 38, located between the battery cell 10 and the lower heating plate 33, can prevent the battery cell 10 from sticking to the lower heating plate 33. At the same time, the film 38 compensates for the parallelism error between the upper heating plate 5 and the lower heating plate 33 caused by hot pressing, preventing the battery cell 10 from delamination or misalignment during hot pressing. This ensures good flatness and high yield of the battery cell during hot pressing. It solves the problem of low hot pressing efficiency and poor battery cell quality caused by the electrode sheets easily sticking to the upper and lower hot pressing plates or the entire battery cell being attached to the lower pressing block after using existing hot pressing equipment for hot pressing of the battery cell.

[0043] In this embodiment, both the first membrane support plate translation drive device 361 and the second membrane support plate translation drive device 362 are preferably double slide cylinders.

[0044] Reference Figure 5 As shown, the membrane tensioning assembly 37 includes a linear guide rod mounting plate 370, a first buffer linear guide rod assembly 371, a second buffer linear guide rod assembly 372, a membrane tensioning block 373, and a membrane clamping block 374. The linear guide rod mounting plate 370 is mounted on the same end of the two lifting connecting plates 35. The first buffer linear guide rod assembly 371 and the second buffer linear guide rod assembly 372 are respectively longitudinally mounted on the linear guide rod mounting plate 370. The membrane tensioning block 373 is mounted on the top of the first buffer linear guide rod assembly 371 and the second buffer linear guide rod assembly 372. The membrane clamping block 374 mounts the end of the membrane 38 onto the membrane tensioning block 373 and is mounted on one side of the membrane tensioning block 373.

[0045] In this embodiment, both the first buffer linear guide rod assembly 371 and the second buffer linear guide rod assembly 372 include a guide rod, a second spring, a linear bearing, and a locking ring. The linear bearing is mounted on the linear guide rod mounting plate 370, and the guide rod moves through the linear bearing. The upper end of the guide rod is connected and installed to the film-forming mounting block 373. The locking ring is mounted on the lower end of the guide rod. The second spring is sleeved on the guide rod, with one end of the second spring abutting against the linear bearing and the other end of the second spring abutting against the locking ring.

[0046] By adopting the above technical solution, the first membrane support plate translation drive device 361 and the second membrane support plate translation drive device 362 respectively drive the first membrane support plate 364 and the second membrane support plate 365 to move away from each other. Under the drive of the connecting plate lifting drive device 341, the first membrane support plate 364 and the second membrane support plate 365 respectively pull the membrane 38 upward. At the same time, the membrane 38 pulls the corresponding guide rod upward through the membrane mounting block 373. The second spring buffers the upward sliding of the guide rod through the locking ring. When the first membrane support plate translation drive device 361 and the second membrane support plate translation drive device 362 respectively drive the first membrane support plate 364 and the second membrane support plate 365 to move closer to each other, the membrane 38 becomes loose. The second spring pushes the guide rod downward through the locking ring and then pulls the membrane 38 downward. The first buffer linear guide rod assembly 371 and the second buffer linear guide rod assembly 372 respectively pull the two ends of the membrane 38 downward to achieve tensioning of the membrane 38.

[0047] Reference Figure 6 As shown, the cell tray translation assembly 8 includes a third linear guide rail 81, a limiting block 82, a cell tray translation drive device 83, a first support rod connecting block 84, a second support rod connecting block 85, and a cell tray 86. The third linear guide rail 81 and the cell tray translation drive device 83 are installed in parallel on both ends of the base plate 32. The first support rod connecting block 84 is installed on the output end of the cell tray translation drive device 83. The second support rod connecting block 85 is slidably installed on the third linear guide rail 81. Both ends of the cell tray 86 are connected and installed to the first support rod connecting block 84 and the second support rod connecting block 85, respectively.

[0048] By adopting the above technical solution, the cell tray translation drive device 83 drives the cell tray 86 to slide on the third linear guide rail 81 through the first support rod connecting block 84. The cell tray 86 moves to the bottom of the film to support the cell loading or unloading after hot pressing. In this embodiment, the cell tray translation drive device 83 is preferably a rodless cylinder.

[0049] Reference Figure 7 As shown, the base plate locking mechanism 9 includes a fourth linear guide rail 91, a base plate limiting block lifting drive device 92, and a base plate limiting block 93. The fourth linear guide rail 91 and the base plate limiting block lifting drive device 92 are respectively mounted on the translation base frame 30. The base plate limiting block 93 is slidably mounted on the fourth linear guide rail 91. The output end of the base plate limiting block lifting drive device 92 is connected and installed with the base plate limiting block 93.

[0050] By adopting the above technical solution, the bottom plate limiting block lifting drive device 92 drives the bottom plate limiting block 93 to insert into the bottom plate 32 to limit the bottom plate 32, thus preventing misalignment during the hot pressing of the battery cell by the upper hot pressing mechanism 2 and the lower hot pressing mechanism 3, improving the effect of the hot pressing of the battery cell and ensuring the quality of the hot pressing molding of the battery cell. In this embodiment, the bottom plate limiting block lifting drive device 92 is set as a cylinder.

[0051] Reference Figures 1 to 7As shown, the non-destructive hot pressing forming machine for battery cells is used in conjunction with a robotic arm. The robotic arm loads and unloads the battery cells 10. During operation, the base plate moving assembly 31 moves the lower heating plate 33 and the stretching film 38 out of the hot pressing support 1. The battery cell lifting assembly 34 raises the stretching film 38, and the stretching film leveling assembly 36 moves the first stretching film support plate 364 and the second stretching film support plate 365 closer together. The two stretching film tensioning assemblies 37 pull the stretching film 38 downward to tension it. The battery cell support plate translation assembly 8 moves the battery cell support plate 86 below the stretching film 38. The battery cell lifting assembly 34 lowers the stretching film 38 to the top surface of the battery cell support plate 86. The robotic arm places the battery cell onto the stretching film 38 and supports it with the battery cell support plate 86. Both ends of the battery cell 10 are supported by the battery cell support plate 86. Plate 86 is suspended to facilitate the placement and removal of the battery cells by the robotic arm, preventing the robotic arm from scratching the membrane 38. The base plate moving assembly 31 moves the battery cell support plate 86 and the battery cell 10 into the hot-pressing bracket 1. The base plate locking mechanism 9 locks and fixes the base plate 32. Simultaneously, the membrane leveling assembly 36 moves the first membrane support plate 364 and the second membrane support plate 365 away from each other, allowing the membrane 38 to fully support the battery cell 10. The battery cell support plate translation assembly 8 moves the battery cell support plate 86 out of the membrane 38. The safety pin assembly 6 releases the locking and fixing of the fixing plate 43 and the upper heating plate 5. The battery cell lifting assembly 34 lowers the battery cell 10 to the top surface of the lower heating plate 33. The upper hot-pressing mechanism 2 presses the battery cell 10 firmly onto the lower heating plate 33 to ensure proper functioning. 0. Hot pressing and shaping are performed, while short-circuit test component 7 performs a short-circuit test on battery cell 10. After the hot pressing and shaping and short-circuit test of battery cell 10 are completed, the base plate moving component 31 moves battery cell support plate 86 and battery cell 10 out of the hot pressing bracket 1. The film pulling and leveling component 36 moves the first film pulling support plate 364 and the second film pulling support plate 365 on it closer to each other and to the bottom surface of battery cell 10 to support battery cell 10. The two film pulling tensioning components 37 pull the film pulling film 38 downward to tension the film pulling film 38. The battery cell lifting component 34 raises battery cell 10. The battery cell support plate translation component 8 moves the battery cell support plate 86 on it to below battery cell 10. The battery cell lifting component 34 lowers battery cell 10 to the top surface of battery cell support plate 86. Both ends of battery cell 10 are suspended by battery cell support plate 86. The robotic arm grips both ends of the battery cell 10, preventing it from scratching the membrane 38. Simultaneously, the battery cell support plate 86 replaces the membrane support plate in supporting the battery cell 10, avoiding strong friction between the membrane support plate and the membrane 38 during movement due to the weight of the battery cell 10, which could cause scratches. The battery cell support plate 86 provides stronger rigidity and more stable support. Its overall structural design prevents the battery cell 10 from sticking to the hot press plate, ensuring the integrity of the battery cell 10's appearance and quality. This improves the reliability and efficiency of handling stacked batteries, increases the yield of stacked batteries, reduces losses, lowers costs, and prevents phenomena such as separator wrinkles, damage, and electrode misalignment caused by external forces.This method not only effectively solves the problems of low hot-pressing efficiency, easily damaged cell appearance, low yield, high loss, high cost, and separator wrinkling, damage, and electrode misalignment caused by external forces when using existing hot-pressing equipment for cell hot-pressing, which results in electrode sheets easily sticking to the upper and lower hot-pressing plates or the entire cell adhering to the lower pressing block. It also solves the problem of uneven cell thickness or indentations after hot-pressing due to inconsistent heights or gaps between the lifting block and the hot-pressing plate when using commonly used cell hot-pressing devices.

[0052] The above embodiments are merely examples of this utility model and are not intended to limit the implementation and scope of this utility model. All technical solutions that are the same as or equivalent to the contents described in the claims of this utility model should be included within the protection scope of this utility model.

Claims

1. A cell-free hot pressing forming machine, including a hot pressing bracket, characterized in that: It also includes an upper hot pressing mechanism and a lower hot pressing mechanism. The upper hot pressing mechanism is installed inside the top of the hot pressing bracket, and the lower hot pressing mechanism is located below the upper hot pressing mechanism. The upper hot-pressing mechanism includes an upper hot-pressing lifting assembly, an upper heating plate, a safety pin assembly, and a short-circuit test assembly. The upper hot-pressing lifting assembly is installed inside the top of the hot-pressing bracket, and the upper heating plate and the short-circuit test assembly are installed side by side at the bottom of the upper hot-pressing lifting assembly. The upper heating plate presses the battery cell to perform hot-pressing shaping, the short-circuit test assembly performs short-circuit testing on the battery cell, and the safety pin assembly is installed on the upper hot-pressing lifting assembly and is used to lock and fix the upper heating plate. The lower hot pressing mechanism includes a sliding base frame, a base plate moving assembly, a base plate, a lower heating plate, two battery cell lifting assemblies, two lifting connecting plates, a film stretching and leveling assembly, two film stretching and tensioning assemblies, and a film stretching mechanism. The base plate moving assembly is mounted on the sliding base frame, the base plate is mounted on the base plate moving assembly, the lower heating plate is mounted on the base plate, the two battery cell lifting assemblies are respectively mounted on two opposite ends of the base plate, the two lifting connecting plates are respectively mounted on the two battery cell lifting assemblies, the film stretching and leveling assembly is mounted on the two lifting connecting plates, one film stretching and tensioning assembly is mounted on the same end of the two lifting connecting plates, and the other film stretching and tensioning assembly is mounted on the other end of the two lifting connecting plates. The two ends of the film stretching mechanism are respectively connected and installed to the two film stretching and tensioning assemblies, and the film stretching and leveling assembly supports the middle part of the film stretching mechanism. A battery cell support plate sliding assembly is also mounted on the base plate, and a base plate locking mechanism for locking and positioning the base plate is also mounted on the sliding base frame.

2. The cell non-destructive hot pressing forming machine according to claim 1, characterized in that: The upper hot press lifting assembly includes an upper heating plate lifting drive device, a coupling, two connecting buckles, a fixed plate, two lifting movable plates, and at least two first linear guide rails. At least one first linear guide rail is longitudinally installed inside one side wall of the hot press bracket, and at least one first linear guide rail is longitudinally installed inside the other side wall of the hot press bracket. The two lifting movable plates are respectively lifted and slidably installed on the first linear guide rails on the two side walls of the hot press bracket. The fixed plate is horizontally installed on the two lifting movable plates. The two connecting buckles are installed opposite each other on the top of the fixed plate. The upper heating plate lifting drive device is longitudinally installed on the top of the hot press bracket. The coupling is installed on the output end of the upper heating plate lifting drive device and is fastened to the two connecting buckles.

3. The cell non-destructive hot pressing forming machine according to claim 2, characterized in that: The short-circuit test assembly includes two lifting shafts, two first springs, a mounting guide, and a short-circuit test plate. The mounting guide is mounted on a fixed plate. The two lifting shafts move longitudinally through both ends of the mounting guide and through the fixed plate. The short-circuit test plate is mounted on the bottom of the two lifting shafts. The two first springs are respectively sleeved on the two lifting shafts, and the two ends of the first springs abut against the mounting guide and the short-circuit test plate, respectively.

4. The cell non-destructive hot pressing forming machine according to claim 2, characterized in that: The safety pin assembly includes a pin bearing, a pin, a second linear guide rail, and a pin movement drive device. The pin bearing is mounted on the side wall of the hot press bracket. The second linear guide rail and the pin movement drive device are respectively mounted on the fixed plate. The pin is slidably mounted on the second linear guide rail through a pin seat. The output end of the pin movement drive device is connected and installed with the pin seat.

5. The cell non-destructive hot pressing forming machine according to claim 1, characterized in that: The membrane leveling assembly includes a first membrane support plate translation drive device, a second membrane support plate translation drive device, four positioning adjustment blocks, a first membrane support plate, and a second membrane support plate. The first and second membrane support plate translation drive devices are respectively mounted on two lifting connecting plates. Two positioning adjustment blocks are respectively mounted on the two output ends of the first membrane support plate translation drive device, and the other two positioning adjustment blocks are respectively mounted on the two output ends of the second membrane support plate translation drive device. The first membrane support plate is connected to the positioning adjustment blocks on the same side of the output ends of the first and second membrane support plate translation drive devices. The second membrane support plate is connected to the positioning adjustment blocks on the other side of the output ends of the first and second membrane support plate translation drive devices. The first and second membrane support plates are respectively provided with a first guide groove and a second guide groove for the membrane to pass through and for supporting the membrane.

6. The cell non-destructive hot pressing forming machine according to claim 1, characterized in that: The membrane tensioning assembly includes a linear guide rod mounting plate, a first buffer linear guide rod assembly, a second buffer linear guide rod assembly, a membrane tensioning block, and a membrane clamping block. The linear guide rod mounting plate is installed on the same end of two lifting connecting plates. The first buffer linear guide rod assembly and the second buffer linear guide rod assembly are respectively longitudinally installed on the linear guide rod mounting plate. The membrane tensioning block is installed on the top of the first buffer linear guide rod assembly and the second buffer linear guide rod assembly. The membrane clamping block mounts the end of the membrane onto the membrane tensioning block.

7. The cell non-destructive hot pressing forming machine according to claim 1, characterized in that: The battery cell tray translation assembly includes a third linear guide rail, a limiting block, a battery cell tray translation drive device, a first support rod connecting block, a second support rod connecting block, and a battery cell tray. The third linear guide rail and the battery cell tray translation drive device are installed in parallel on both ends of the base plate. The first support rod connecting block is installed on the output end of the battery cell tray translation drive device. The second support rod connecting block is slidably installed on the third linear guide rail. Both ends of the battery cell tray are connected and installed to the first support rod connecting block and the second support rod connecting block, respectively.

8. The cell non-destructive hot pressing forming machine according to claim 1, characterized in that: The base plate locking mechanism includes a fourth linear guide rail, a base plate limit block lifting drive device, and a base plate limit block. The fourth linear guide rail and the base plate limit block lifting drive device are respectively mounted on the translation base frame. The base plate limit block is slidably mounted on the fourth linear guide rail. The output end of the base plate limit block lifting drive device is connected and installed with the base plate limit block.

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