Battery cell traceless hot pressing equipment

Abstract

The utility model discloses battery cell traceless hot pressing equipment which comprises a rack (100), a bottom plate (200) and a plurality of movable plates (300), the bottom plate (200) and the movable plates (300) are arranged on the rack (100), the bottom plate (200) is fixedly arranged at the bottom of the rack (100), the movable plates (300) are movably connected with the rack (100), the bottoms of the movable plates (300) are all provided with upper pressing plates (400), and the upper pressing plates (400) are fixedly connected with the rack (100). Mylar film floating assemblies (500), jacking assemblies (600) and lower pressing plates (700) are arranged on the movable plate (300) located below the upper pressing plate (400) and the bottom plate (200). The Mylar film floating lifting assembly (500) and the jacking assembly (600) are arranged between the adjacent upper pressing plate (400) and the lower pressing plate (700), and the jacking assembly (600) and the corresponding upper pressing plate (400) and the lower pressing plate (700) form a traceless hot-pressing shaping mechanism. According to the hot-pressing equipment, the problem that the cell is easy to generate indentations due to the fact that the hot-pressing plate of the hot-pressing equipment is provided with clamping jaw avoidance is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a traceless hot pressing device for a battery cell. Background Art

[0002] In the production process of lithium-ion batteries, after the basic battery cells are formed, they will be hot-pressed and shaped. This hot-pressing and shaping process can improve the flatness of the lithium-ion battery, eliminate diaphragm wrinkles, and expel the air inside the battery cells, so that the diaphragm and the positive electrode, and the diaphragm and the negative electrode are tightly attached together. In related technologies, the battery cells are usually placed on a hot pressing plate using a clamping method before hot pressing. The hot pressing plate needs to avoid the clamping position. In this case, the hot pressing plate needs to be set as a split structure. Since the temperature and heat dissipation conditions at different positions of the hot pressing plate are different, and the thermal expansion and contraction of the material are inconsistent, the surface of the hot pressing plate is prone to height differences. Under the action of pressure, the battery cells are prone to indentations, which affects the quality of the battery cells.

[0003] Currently, there is a problem in the hot pressing plate of the hot pressing equipment in the related art that the clamping jaws are set to avoid the problem of easily causing indentations on the battery cells, and no effective solution has been proposed yet. Utility Model Content

[0004] In view of this, it is necessary to provide a cell-free hot pressing device to at least solve the problem in the related art that the hot pressing plate of the hot pressing device is provided with a clamping claw avoidance, which easily causes indentations on the cell.

[0005] In the first aspect, the utility model provides a technical solution as follows: a traceless hot pressing device for battery cells, comprising a frame, a bottom plate arranged on the frame and a plurality of movable plates, wherein the bottom plate is fixedly arranged at the bottom of the frame, and the plurality of movable plates are movably connected to the frame and can slide in the vertical direction, and an upper pressure plate is provided at the bottom of the plurality of movable plates, and the movable plate and the bottom plate located below the upper pressure plate are provided with a Mylar film floating assembly, a top supporting assembly and a lower pressure plate, and the Mylar film floating assembly and the top supporting assembly arranged between adjacent upper and lower pressure plates and the corresponding upper and lower pressure plates constitute a traceless hot pressing shaping mechanism, wherein the The lifting assembly includes a top plate, and is used to drive the top plate to lift the Mylar film of the Mylar film floating assembly to the loading and unloading station, so that the Mylar film supporting the battery cell can be separated from the lower pressure plate for loading and unloading; the Mylar film floating assembly is used to transfer the tightened Mylar film and the battery cell supported by the Mylar film to the lower pressure plate after the Mylar film bears the battery cell to be hot-pressed, and to float the Mylar film and the battery cell to be unloaded to dock with the lifting assembly; the upper pressure plate is used to move with the corresponding movable plate to press the Mylar film floating assembly and the battery cell down to the lower pressure plate, and to hot-press and shape the battery cell with the lower pressure plate.

[0006] In the above-mentioned cell seamless hot pressing equipment, a top supporting assembly and a Mylar film floating assembly are provided, and the top supporting assembly drives the top plate to lift the Mylar film of the Mylar film floating assembly to the loading and unloading station, so that the Mylar film supporting the cell is separated from the lower pressure plate for cell loading and unloading. A Mylar film that can be tightened is provided, and the hot pressing plate with an integral structure can also meet the requirements of taking and placing, avoiding indentations on the cell caused by setting an avoidance position on the lower pressure plate; the top supporting assembly is provided in the middle of the cell, leaving space for taking and placing the cell, ensuring stable battery taking and placing; at the same time, multiple seamless hot pressing shaping mechanisms are provided to improve processing efficiency; the problem of the hot pressing plate of the hot pressing equipment in the related art being provided with a clamping avoidance position, which easily causes indentations on the cell, is solved, and the beneficial effects of seamless hot pressing shaping of the cell and improved hot pressing efficiency are achieved.

[0007] In one embodiment, in order to enable the Mylar film to be lifted up and the supported battery cell to be transferred to the lower pressure plate, the Mylar film floating assembly also includes a frame, a floating spring, a Mylar film pressure plate and a Mylar film tensioner. The frame is connected to the corresponding movable plate or the bottom plate through the floating spring. The lateral sides of the frame are provided with guide members extending along the longitudinal direction thereof. The Mylar film pressure plate is connected to the guide members. The longitudinally extended Mylar film is connected to the two Mylar film pressure plates spaced apart in the longitudinal direction. The two Mylar film pressure plates are connected to the guide members. They are also connected to the pull columns provided on the frame through the corresponding Mylar film tensioners, wherein the Mylar film tensioner is used to pull the two Mylar film pressure plates to move away from each other along the guide member, so as to tighten the Mylar film pulled by the two Mylar film pressure plates and cushion the impact of the jacking assembly on the lifted Mylar film; the lifting spring is used to damp and buffer the frame that is pressed down and to drive the frame to drive the Mylar film and the battery cell to be unloaded to float until they are docked with the lifting assembly.

[0008] With such a configuration, the floating spring provides damping and buffering for the frame pressed downward by the upper pressure plate, thereby reducing the impact of the upper pressure plate on the lower pressure plate when the upper pressure plate presses the battery cell and the Mylar film to the lower pressure plate, and preventing the battery cell from being crushed; the Mylar film tensioner slows down the movement of the two Mylar film pressure plates towards each other when the jacking assembly lifts the Mylar film, buffering the impact of the jacking assembly on the lifted Mylar film; and after the jacking assembly releases the lifted Mylar film, the two Mylar film pressure plates are pulled away from each other to tighten the Mylar film and horizontally support the battery cell.

[0009] In one embodiment, in order to ensure that the battery cell does not shift in the horizontal direction and to ensure the alignment of the pole pieces, the Mylar membrane floating assembly also includes a synchronous belt installed on both sides of the frame through a synchronous wheel, and the synchronous belt is also connected to the corresponding Mylar membrane pressure plate through a side slider, wherein the two side sliders connected to the same synchronous belt are also configured to be respectively connected to the upper belt and lower belt of the corresponding synchronous belt; the two side sliders connected to the same Mylar membrane pressure plate are also configured so that when one of the side sliders is connected to the upper belt of one of the two synchronous belts, the other side slider is connected to the lower belt of the other synchronous belt.

[0010] In this way, by setting up a synchronous belt and a side slider, and connecting the side sliders to the upper belt and lower belt corresponding to the synchronous belt respectively, when the Mylar film is tightened accordingly, the two Mylar film pressure plates move toward each other synchronously, so that the Mylar film can move synchronously on both sides in the longitudinal direction. When the Mylar film supports the battery cell, no displacement occurs in the horizontal direction, ensuring the alignment of the pole pieces.

[0011] In one embodiment, the Mylar film tensioner includes a tensioning spring, and / or the guide member includes one of the following: a linear guide rail, a ball spline, and a ball screw.

[0012] In one embodiment, in order to lift the top plate and drive the top plate in and out of the Mylar film area, the jacking assembly further includes a lifting device and a translation transmission unit. The translation transmission unit is arranged on the corresponding movable plate or the bottom plate and is in transmission connection with the lifting device. The translation transmission unit can drive the lifting device to move along the longitudinal direction of the frame. The lifting device is also in transmission connection with the top plate and can drive the top plate to move vertically, wherein,

[0013] The translation transmission unit is used to transmit the lifting device to drive the top plate to move along the longitudinal direction of the frame, so that the top plate moves to a position below the Mylar film or to a position longitudinally outside the Mylar film;

[0014] The lifting device is used to drive the top plate to move vertically so that the top plate lifts up the Mylar film or separates from the Mylar film.

[0015] In one embodiment, the lifting device includes a square cylinder.

[0016] In one embodiment, the translation transmission unit includes a transverse cylinder and a first linear slide rail, the first linear slide rail is arranged on the corresponding movable plate or the base plate, and the lifting device is arranged on the linear slider of the first linear slide rail and is connected to the transverse cylinder.

[0017] In one embodiment, in order to realize the opening and closing of the upper pressing plate and the lower pressing plate so as to perform hot pressing and shaping on the battery cells, second linear guide rails extending vertically are provided on both lateral sides of the frame, and the second linear guide rails are transmission-connected to the slides. Each movable plate is connected to the slides located on both lateral sides thereof, and the movable plate close to the bottom plate and any two adjacent movable plates are connected to the bottom plate through a hot pressing transmission device, wherein,

[0018] The hot pressing transmission device is used to drive the corresponding movable plate to drive the corresponding upper pressing plate to move relative to the bottom plate or the movable plate provided with the lower pressing plate, so that the upper pressing plate and the lower pressing plate can be opened and closed;

[0019] The upper pressing plate presses the Mylar film floating assembly and the battery cell down onto the lower pressing plate while following the corresponding movable plate to move toward the corresponding lower pressing plate.

[0020] In one embodiment, the hot pressing transmission device includes one of the following: a telescopic cylinder, a linear motor.

[0021] In one embodiment, a plurality of thermocouples for heating the corresponding pressing plates are embedded in the upper pressing plate and the lower pressing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the battery cell traceless hot pressing equipment according to an embodiment of the present application;

[0023] Figure 2 This is a front view of the battery cell traceless hot pressing device according to an embodiment of the present application;

[0024] Figure 3 A side view of a traceless hot pressing device for battery cells according to an embodiment of the present application;

[0025] Figure 4 This is an assembly diagram of the Mylar membrane buoyancy assembly and the jacking assembly of an embodiment of the present application;

[0026] Figure 5 Schematic diagram of the assembly of the Mylar membrane buoyancy assembly, the jacking assembly and the lower pressure plate in an embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of material loading and unloading according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 001, battery cell;

[0030] 100, rack;

[0031] 200, bottom plate;

[0032] 300, movable board;

[0033] 400, upper pressing plate;

[0034] 500, Mylar membrane lift assembly; 51, Mylar membrane; 52, frame; 53, lift spring; 54, Mylar membrane pressure plate; 55, Mylar membrane tensioner; 56, guide; 57, pull post; 58, synchronous pulley; 59, synchronous belt; 510, side slider; 591, upper belt; 592, lower belt;

[0035] 600, jacking assembly; 61, top plate; 62, jacking device; 63, translation transmission unit; 631, transverse cylinder; 632, first linear guide rail;

[0036] 700, lower pressure plate;

[0037] 800, second linear guide rail;

[0038] 900, slide seat;

[0039] 110. Hot pressing transmission device;

[0040] 120. Thermocouple. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] It should be noted that when a component is referred to as being "mounted on" another component, it may be mounted directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Figure 1This is a schematic diagram of the three-dimensional structure of the battery cell non-marking hot pressing equipment according to an embodiment of the present application. The illustrated battery cell non-marking hot pressing equipment is applied to the hot pressing and shaping of lithium battery cells. It can achieve non-marking hot pressing and shaping of battery cells, improve hot pressing efficiency and cell quality, and reduce processing difficulty and equipment costs.

[0045] See also Figures 1 to 6 The battery cell traceless hot pressing equipment of the embodiment of the present application includes a frame 100, a bottom plate 200 provided on the frame 100 and a plurality of movable plates 300. The bottom plate 200 is fixed to the bottom of the frame 100, and the plurality of movable plates 300 are movably connected to the frame 100 and can slide in the vertical direction. An upper pressing plate 400 is provided at the bottom of the plurality of movable plates 300. The movable plates 300 located below the upper pressing plate 400 and the bottom plate 200 are provided with a Mylar film floating assembly 500, a top supporting assembly 600 and a lower pressing plate 700. The Mylar film floating assembly 500 and the top supporting assembly 600 provided between the adjacent upper pressing plates 400 and the lower pressing plates 700 form a traceless hot pressing shaping mechanism with the corresponding upper pressing plates 400 and the lower pressing plates 700, wherein

[0046] The supporting assembly 600 includes a top plate 61 and is used to drive the top plate 61 to lift the Mylar film 51 of the Mylar film lifting assembly 500 to the loading and unloading station, so that the Mylar film 51 supporting the battery cell 001 can be separated from the lower pressure plate 700 for loading and unloading.

[0047] In this embodiment, when the battery cell 001 is being loaded and unloaded, the top support assembly 600 and the top plate are both located in the area directly below the Mylar film 51 (defined as the Mylar film area in this application), and the top support assembly 600 also drives the top plate 61 to move vertically to above the Mylar film floating assembly 500. At this time, the Mylar film 51 is not in a horizontally stretched state, but in an arched state. At this time, the battery cell 001 to be hot-pressed is placed on the Mylar film 51 above the top plate 61, or the battery cell 001 that has completed hot pressing and shaping is removed from the Mylar film 51. In this way, the loading and unloading of the battery cell 001 is completed; in this embodiment, after the battery cell 001 to be hot-pressed is loaded onto the Mylar film 51, the top plate 61 first retracts vertically and is then driven to exit the Mylar film area so that the upper pressing plate 400 and the lower pressing plate 700 are pressed together.

[0048] The Mylar film lifting assembly 500 is used to transfer the stretched Mylar film 51 and the battery cell 001 supported by the Mylar film 51 to the lower pressure plate 700 after the Mylar film 51 supports the battery cell 001 to be hot-pressed, and to lift the Mylar film 51 and the battery cell 001 to be unloaded to dock with the top support assembly 600.

[0049] In this embodiment, after the battery cell 001 to be hot pressed is loaded, the top plate 61 of the supporting assembly 600 will drop vertically. During the vertical drop of the top plate 61, the longitudinal sides of the Mylar film 51 will be pulled and tightened, that is, the Mylar film 51 is always in a tightened state. Before the top plate 61 drops to a position lower than the horizontal tightened state of the Mylar film 51, the top plate 61 lifts up the Mylar film 51 while also supporting the loaded battery cell 001. When the top plate drops to a position lower than the Mylar film 51, the Mylar film 51 is tightened. After the horizontal tensioned state is reached, the top plate 61 no longer supports the battery cell 001, but is supported by the horizontally tensioned Mylar film 51. It should be understood that since the Mylar film 51 is always maintained in a tensioned state, that is, even when the Mylar film 51 is lifted up by the top plate 61, its two longitudinal ends are also pulled and tightened, so that the Mylar film 51 is always in an extended state, thereby ensuring that no wrinkles are generated on the surface of the Mylar film 51, thereby avoiding the formation of indentations after the battery cell is hot-pressed due to wrinkles.

[0050] The upper pressing plate 400 is used to move with the corresponding movable plate 300 to press the Mylar membrane lifting assembly 500 and the battery cell 001 down onto the lower pressing plate 700, and to perform hot pressing and shaping on the battery cell 001 together with the lower pressing plate 700.

[0051] In this embodiment, when the corresponding movable plate 300 is driven to move vertically, the upper pressure plate 400 will follow the movement accordingly. When the upper pressure plate 400 moves vertically downward, it will first contact the battery cell 001 and the Mylar film floating assembly 500. After that, the battery cell 001 and the Mylar film floating assembly 500 will be pressed down until the Mylar film 51 contacts the lower pressure plate 700. At this time, the upper pressure plate 400 and the lower pressure plate 700 are closed and hot-pressed.

[0052] In this embodiment, a plurality of thermocouples 120 for heating the corresponding pressing plates are embedded in the upper pressing plate 400 and the lower pressing plate 700 .

[0053] In the above-mentioned battery cell traceless hot pressing equipment, a top supporting assembly 600 and a Mylar film floating assembly 500 are set, and the top supporting assembly 600 drives the top plate 61 to lift the Mylar film 51 of the Mylar film floating assembly 500 to the loading and unloading station, so that the Mylar film 51 supporting the battery cell 001 is separated from the lower pressure plate 700 for battery cell loading and unloading. The Mylar film 51 that can be tightened is set, and the hot pressing plate with an integral structure can also meet the requirements of taking and placing, avoiding the indentation of the battery cell 001 caused by the setting of an avoidance space on the lower pressure plate 700; the top supporting assembly 600 is set in the middle of the battery cell 001, leaving space for taking and placing the battery cell 001, ensuring stable battery taking and placing; at the same time, multiple traceless hot pressing shaping mechanisms are set to improve processing efficiency.

[0054] It should be noted that the hot pressing plate of the battery cell markless hot pressing equipment of the embodiment of the present application can adopt an integral structure, and the hot pressing plate is heated evenly to avoid the occurrence of indentations, thereby improving the quality of the battery cell, while reducing the processing difficulty and cycle, and reducing the equipment cost; the embodiment of the present application adopts a multi-layer arrangement, and by setting up multiple stacked markless hot pressing shaping mechanisms, one device can process at the same time, thereby improving efficiency and reducing costs; the lifting position is in the middle part of the battery cell, and space is left on both sides for the pick-up and placement robots to clamp, so that the battery cell remains stable during transportation.

[0055] In order to realize that the Mylar film 51 can be lifted up and the carried battery cell 001 can be transferred to the lower pressing plate 700, refer to Figures 1 to 6 In one embodiment, the Mylar membrane buoyancy assembly 500 further includes a frame 52, a buoyancy spring 53, a Mylar membrane pressure plate 54, and a Mylar membrane tensioner 55. The frame 52 is connected to the corresponding movable plate 300 or the bottom plate 200 via the buoyancy spring 53. Guide members 56 extending in the longitudinal direction of the frame 52 are provided on both lateral sides thereof. The Mylar membrane pressure plates 54 are connected to the guide members 56. The longitudinally extended Mylar membrane 51 is connected to the two Mylar membrane pressure plates 54 spaced apart in the longitudinal direction. The two Mylar membrane pressure plates 54 are also connected to the pull columns 57 provided on the frame 52 via the corresponding Mylar membrane tensioners 55.

[0056] The Mylar film tensioner 55 is used to pull the two Mylar film pressure plates 54 to move away from each other along the guide member 56 to tighten the Mylar film 51 pulled by the two Mylar film pressure plates 54 and to cushion the impact of the jacking assembly 600 on the lifted Mylar film 51.

[0057] In this embodiment, after the Mylar film 51 is lifted up or released by the top plate 61, the Mylar film pressure plate 54 is pulled by the Mylar film tensioner 55, so that the Mylar film 51 is always in a tensioned state; of course, it should be understood that when the Mylar film 51 is lifted up, the Mylar film 51 is not horizontally stretched, but only the two longitudinal ends are pulled and tightened, so that the Mylar film 51 is always in an extended state, thereby ensuring that no wrinkles are generated on the surface of the Mylar film 51.

[0058] The lifting spring 53 is used to dampen the frame 52 that is pressed downward, and the transmission frame 52 drives the Mylar film 51 and the battery cell 001 to be unloaded to float until they are docked with the supporting assembly 600.

[0059] In this embodiment, the upper pressure plate 400 moves downward vertically, pressing the battery cell 001 and the Mylar film lifting assembly 500 down until the Mylar film 51 contacts the lower pressure plate 700. At this time, the lifting spring 53 is compressed, and the lifting spring 53 provides a reverse elastic force during the compression process to buffer the upper pressure plate 400 and the frame 52 from pressing the lower pressure plate 700 with excessive pressure, thereby achieving hot pressing and shaping of the battery cell 001 with a gentle pressure; after the hot pressing is completed, the upper pressure plate 400 is opened, the lifting spring 53 is released, and the lifting spring 53 will press the frame The rack 52, the Mylar film 51 and the battery cell 001 that has completed hot pressing and finalizing are lifted at the same time, and then float to the docking position with the top supporting assembly 600. It should be understood that the docking position with the top supporting assembly 600 refers to the position where the top plate 61 lifts the Mylar film 51, but at this time, the top plate 51 is still outside the Mylar film area. Therefore, at this time, the top supporting assembly 600 will first transfer (transverse transfer) the top plate 61 to the bottom of the Mylar film 51, and then drive the top plate 61 to lift the Mylar film 51 and the battery cell 001 to the loading and unloading position.

[0060] It can be understood that with such a configuration, the floating spring 53 is used to dampen and buffer the frame 52 pressed down by the upper pressure plate 400, thereby reducing the impact of the upper pressure plate 400 on the lower pressure plate 700 when the upper pressure plate 400 presses the battery cell 001 and the Mylar film 51 to the lower pressure plate 700, thereby preventing the battery cell 001 from being crushed; through the Mylar film tensioner 55, when the supporting assembly 600 lifts the Mylar film 51, the movement of the two Mylar film pressure plates 52 towards each other is slowed down, and the impact of the supporting assembly 600 on the lifted Mylar film 51 is buffered; and after the supporting assembly 600 releases the lifted Mylar film 51, the two Mylar film pressure plates 54 are pulled towards each other to tighten the Mylar film 51 to horizontally support the battery cell.

[0061] In order to ensure that the battery cell does not shift horizontally and the electrode alignment is guaranteed, refer to Figures 1 to 6 In one embodiment, the Mylar film lifting assembly 500 further includes a synchronous belt 59 installed on both sides of the frame 52 via a synchronous pulley 58. The synchronous belt 59 is further connected to the corresponding Mylar film pressing plate 54 via a side slider 510. The two side sliders 510 connected to the same synchronous belt 59 are further configured to be connected to the upper belt 591 and the lower belt 592 of the corresponding synchronous belt 59, respectively (refer to FIG. Figure 4 and Figure 5 The two side sliders 510 connected to the same Mylar film pressing plate 54 are also configured such that when one side slider 510 is connected to the upper belt 591 of one of the two synchronous belts 59, the other side slider 510 is connected to the lower belt 592 of the other synchronous belt 59 (refer to Figure 4 and Figure 5 ).

[0062] In this embodiment, the Mylar film tensioner 55 includes a tensioning spring, and / or the guide member 56 includes one of the following: a linear guide rail, a ball spline, and a ball screw.

[0063] It can be understood that, by setting up a synchronous belt 59 and a side slider 510, and connecting the side slider 510 to the upper belt 591 and the lower belt 592 corresponding to the synchronous belt 59 respectively, when the Mylar film 51 is tightened accordingly, the two Mylar film pressure plates 54 move toward each other synchronously, so that the Mylar film 51 can move synchronously on both sides in the longitudinal direction. When the Mylar film 51 supports the battery cell, no displacement occurs in the horizontal direction, ensuring the alignment of the pole pieces.

[0064] In order to realize the lifting of the top plate 61 and the transmission of the top plate 61 in and out of the Mylar film area, refer to Figures 1 to 6 In one embodiment, the jacking assembly 600 further includes a jacking device 62 and a translation transmission unit 63. The translation transmission unit 63 is disposed on the corresponding movable plate 300 or the bottom plate 200 and is in transmission connection with the jacking device 62. The translation transmission unit 63 can drive the jacking device 62 to move along the longitudinal direction of the frame 100. The jacking device 62 is also in transmission connection with the top plate 61 and can drive the top plate 61 to move vertically.

[0065] The translation transmission unit 63 is used to transmit the lifting device 62 to drive the top plate 61 to move along the longitudinal direction of the frame 100, so that the top plate 61 moves to the bottom of the Mylar film 51 or to the longitudinal outside of the Mylar film 51.

[0066] In this embodiment, the translation transmission unit 63 includes a transverse cylinder 631 and a first linear slide rail 632. The first linear slide rail 632 is arranged on the corresponding movable plate 300 or the base plate 200. The jacking device 62 is arranged on the linear slider of the first linear slide rail 632 and is transmission-connected to the transverse cylinder 631.

[0067] The lifting device 62 is used to drive the top plate 61 to move vertically, so that the top plate 61 lifts up the Mylar film 51 or separates from the Mylar film 51.

[0068] In this embodiment, the lifting device 62 includes a square cylinder.

[0069] In order to realize the opening and closing of the upper and lower pressing plates, refer to Figures 1 to 3 In one embodiment, vertically extending second linear guide rails 800 are provided on both lateral sides of the frame 100. The second linear guide rails 800 are transmission-connected to the slides 900. Each movable plate 300 is connected to the slides 900 located on both lateral sides thereof. The movable plate 300 close to the base plate 200 and any two adjacent movable plates 300 are connected to the base plate 200 through a hot pressing transmission device 110.

[0070] The hot pressing transmission device 110 is used to drive the corresponding movable plate 300 to drive the corresponding upper pressing plate 400 to move relative to the bottom plate 200 or the movable plate 300 provided with the lower pressing plate 700, so that the upper pressing plate 400 and the lower pressing plate 700 can open and close.

[0071] In this embodiment, the hot pressing transmission device 110 includes one of the following: a telescopic cylinder, a linear motor.

[0072] The upper pressing plate 400 , while following the corresponding movable plate 300 and moving toward the corresponding lower pressing plate 700 , presses the Mylar film lifting assembly 500 and the battery cell 001 down onto the lower pressing plate 700 .

[0073] In some optional embodiments, two movable plates 300 are provided on the frame 100, and the frame 100 forms two traceless hot pressing and shaping mechanisms, the uppermost movable plate 300 serves as a support plate for the upper pressure plate 400 of the upper traceless hot pressing and shaping mechanism, the middle movable plate 300 serves as a support plate for the lower pressure plate 700 of the upper traceless hot pressing and shaping mechanism, and also serves as a support plate for the upper pressure plate 400 of the lower traceless hot pressing and shaping mechanism, and the hot pressing transmission devices 110 of the two traceless hot pressing and shaping mechanisms are symmetrically installed, that is, the ends of the output shafts of the hot pressing transmission devices 110 are connected to the middle movable plate 300, and when hot pressing and shaping the battery cell 001, the hot pressing transmission device 110 of the lower traceless hot pressing and shaping mechanism The device 110 drives the middle movable plate 300 to move downward. At this time, the hot pressing transmission device 110 of the upper seamless hot pressing forming mechanism first acts as a linkage device to drive the uppermost movable plate 300 to follow and move downward (the upper pressure plate 400 and the lower pressure plate 700 of the upper seamless hot pressing forming mechanism do not move towards each other). Afterwards, the hot pressing transmission device 110 of the upper seamless hot pressing forming mechanism will make a retreat action, and then pull the uppermost movable plate 300 and move it closer to the middle movable plate 300, thereby realizing the closing of the upper pressure plate 400 and the lower pressure plate 700 of the upper seamless hot pressing forming mechanism; and when the upper pressure plates 400 of the two seamless hot pressing forming mechanisms are opened, they make the opposite movement to the above.

[0074] refer to Figures 1 to 6 The working process of hot pressing and shaping is described as follows using a traceless hot pressing and shaping mechanism:

[0075] 1. The lifting device 62 under the Mylar film 51 extends and lifts up the Mylar film 51. Then, the gripper robot carries the battery cell 001 to the top of the Mylar film 51 and places the battery cell 001 on the Mylar film 51. At this time, the lifting device 62 supports the middle position of the battery cell 001. After that, the robot is pushed out to the area outside the rack 100 and waits for the hot pressing to be completed.

[0076] 2. The lifting device 62 drives the top plate 61 down to its position. Due to the Mylar film tensioner 55, the Mylar film 51 is always in a tightened state. The synchronous belt 59 makes the Mylar films 51 on both sides move simultaneously to ensure that the battery cell 001 does not move in the horizontal direction.

[0077] 3. The lifting device 62 exits the Mylar film area driven by the translation transmission unit 63. The hot pressing transmission device 110 drives the upper pressure plate 400 to press down, and presses the battery cell 001 and the Mylar film lifting assembly 500 to contact the lower pressure plate 700 at the same time. At this time, the lifting spring 53 is compressed.

[0078] 4. After the hot pressing is completed, the upper pressure plate 400 is driven to open, and the floating spring 53 lifts the Mylar film 51 and the battery cell 001 at the same time. The translation transmission unit 63 sends the lifting device 62 and the top plate 61 to the middle part of the battery cell 001. The lifting device 62 drives the top plate 61 to rise, and the middle part of the battery cell 001 is lifted. The gripper robot enters the hot pressing equipment and removes the battery cell 001.

[0079] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. Battery cell traceless hot pressing equipment, characterized in that, The invention comprises a frame (100), a bottom plate (200) arranged on the frame (100) and a plurality of movable plates (300), wherein the bottom plate (200) is fixedly arranged at the bottom of the frame (100), the plurality of movable plates (300) are movably connected to the frame (100) and can slide in the vertical direction, the bottoms of the plurality of movable plates (300) are each provided with an upper pressing plate (400), the movable plates (300) located below the upper pressing plate (400) and the bottom plate (200) are each provided with a Mylar film floating assembly (500), a top supporting assembly (600) and a lower pressing plate (700), the Mylar film floating assembly (500) and the top supporting assembly (600) arranged between the adjacent upper pressing plates (400) and the lower pressing plates (700) and the corresponding upper pressing plates (400) and the lower pressing plates (700) constitute a traceless hot pressing shaping mechanism, wherein: The supporting assembly (600) includes a top plate (61) and is used to drive the top plate (61) to lift the Mylar film (51) of the Mylar film floating assembly (500) to the loading and unloading station, so that the Mylar film (51) supporting the battery cell (001) is separated from the lower pressure plate (700) for loading and unloading; The Mylar film floating assembly (500) is used to transfer the stretched Mylar film (51) and the battery cell (001) supported by the Mylar film (51) to the lower pressing plate (700) after the Mylar film (51) supports the battery cell (001) to be hot-pressed, and to float the Mylar film (51) and the battery cell (001) to be unloaded to dock with the top supporting assembly (600); The upper pressing plate (400) is used to move following the corresponding movable plate (300) to press the Mylar membrane floating assembly (500) and the battery cell (001) down onto the lower pressing plate (700), and to perform hot pressing and shaping on the battery cell (001) together with the lower pressing plate (700).

2. The battery core traceless hot pressing equipment according to claim 1, characterized in that: The Mylar membrane buoyancy assembly (500) further includes a frame (52), a buoyancy spring (53), a Mylar membrane pressure plate (54) and a Mylar membrane tensioner (55), wherein the frame (52) is connected to the corresponding movable plate (300) or the bottom plate (200) via the buoyancy spring (53), and guide members (56) extending along the longitudinal direction of the frame (52) are provided on both lateral sides thereof, and the Mylar membrane pressure plate (54) is connected to the guide members (56), and the longitudinally extended Mylar membrane (51) is connected to the two Mylar membrane pressure plates (54) spaced apart in the longitudinal direction, and the two Mylar membrane pressure plates (54) are also pulled and connected to the pull columns (57) provided on the frame (52) via the corresponding Mylar membrane tensioners (55), wherein: The Mylar film tensioner (55) is used to pull the two Mylar film pressure plates (54) to move away from each other along the guide member (56) to tighten the Mylar film (51) pulled by the two Mylar film pressure plates (54) and to cushion the impact of the jacking assembly (600) on the lifted Mylar film (51); The floating spring (53) is used to provide damping and buffering for the frame (52) that is pressed downward, and to drive the frame (52) to drive the Mylar film (51) and the battery cell (001) to be unloaded to float and dock with the supporting assembly (600).

3. The battery core traceless hot pressing equipment according to claim 2, characterized in that: The Mylar membrane buoyancy assembly (500) further includes a synchronous belt (59) installed on both lateral sides of the frame (52) through a synchronous wheel (58), and the synchronous belt (59) is also connected to the corresponding Mylar membrane pressure plate (54) through a side slider (510), wherein the two side sliders (510) connected to the same synchronous belt (59) are also configured to be respectively connected to the upper belt (591) and the lower belt (592) of the corresponding synchronous belt (59); the two side sliders (510) connected to the same Mylar membrane pressure plate (54) are also configured so that when one of the side sliders (510) is connected to the upper belt (591) of one of the two synchronous belts (59), the other side slider (510) is connected to the lower belt (592) of the other synchronous belt (59).

4. The battery core traceless hot pressing equipment according to claim 2, characterized in that: The Mylar film tensioner (55) includes a tensioning spring, and / or the guide member (56) includes one of the following: a linear guide rail, a ball spline, and a ball screw.

5. The battery core traceless hot pressing equipment according to claim 1, characterized in that: The jacking assembly (600) further includes a jacking device (62) and a translation transmission unit (63), wherein the translation transmission unit (63) is arranged on the corresponding movable plate (300) or the bottom plate (200) and is in transmission connection with the jacking device (62), and the translation transmission unit (63) can drive the jacking device (62) to move along the longitudinal direction of the frame (100), and the jacking device (62) is also in transmission connection with the top plate (61) and can drive the top plate (61) to move vertically, wherein: The translation transmission unit (63) is used to transmit the lifting device (62) to drive the top plate (61) to move along the longitudinal direction of the frame (100), so that the top plate (61) moves to a position below the Mylar film (51) or to a position longitudinally outside the Mylar film (51); The lifting device (62) is used to drive the top plate (61) to move vertically so that the top plate (61) lifts up the Mylar film (51) or detaches from the Mylar film (51).

6. The battery core traceless hot pressing equipment according to claim 5, characterized in that: The lifting device (62) includes a square cylinder.

7. The battery cell traceless hot pressing equipment according to claim 6, characterized in that: The translation transmission unit (63) includes a transverse cylinder (631) and a first linear slide rail (632), wherein the first linear slide rail (632) is arranged on the corresponding movable plate (300) or the base plate (200), and the lifting device (62) is arranged on the linear slider of the first linear slide rail (632) and is transmission-connected to the transverse cylinder (631).

8. The battery core traceless hot pressing equipment according to claim 1, characterized in that: The frame (100) is provided with second linear guide rails (800) extending vertically on both lateral sides. The second linear guide rails (800) are connected to the slides (900) in a transmission manner. Each movable plate (300) is connected to the slides (900) located on both lateral sides thereof. The movable plate (300) close to the bottom plate (200) and the bottom plate (200) as well as any two adjacent movable plates (300) are connected via a hot pressing transmission device (110), wherein: The hot pressing transmission device (110) is used to drive the corresponding movable plate (300) to drive the corresponding upper pressing plate (400) to move relative to the bottom plate (200) or the movable plate (300) provided with the lower pressing plate (700), so as to open and close the upper pressing plate (400) and the lower pressing plate (700); The upper pressing plate (400) presses the Mylar membrane floating assembly (500) and the battery cell (001) down onto the lower pressing plate (700) while following the corresponding movable plate (300) to move toward the corresponding lower pressing plate (700).

9. The battery core traceless hot pressing equipment according to claim 8, characterized in that: The hot pressing transmission device (110) comprises one of the following: a telescopic cylinder, a linear motor.

10. The battery cell traceless hot pressing equipment according to claim 1, characterized in that: A plurality of thermocouples (120) for heating the corresponding pressing plates are also embedded in the upper pressing plate (400) and the lower pressing plate (700).

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