Crimping device

Abstract

The utility model provides a crimping device, which comprises a base, a sealing cover and a pressurizing part, and is characterized in that the base is used for placing a to-be-pressed piece; the sealing cover is used for being matched with the base, so that a sealed space is formed between the sealing cover and the base during pressing; the pressurizing part is connected with the sealing cover, and the pressurizing part is used for applying pressure to the flexible medium in the sealing space, so that the to-be-pressed and attached part is pressed and attached under the pressure action of the flexible medium. The crimping device can uniformly apply pressure to each position of the to-be-pressed piece, so that the pressurizing uniformity of the to-be-pressed piece is ensured, and the pressing effect and the performance of the battery are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a crimping device. Background Technology

[0002] In the battery manufacturing process, it is usually necessary to press and attach some components, such as pressing lithium foil onto the surface of the cell component, pressing and attaching the electrode and separator inside the cell, or pressing and attaching the tabs of multiple cells to achieve electrical connection between the cells.

[0003] Currently, flatbed hot pressing or rolling is generally used to press the parts to be pressed. Taking flatbed hot pressing as an example, the parts to be pressed are placed between two flat hot pressing blocks inside the hot press. The hot pressing blocks provide a certain pressure and temperature to heat-press and shape the parts to be pressed, thereby achieving the pressing effect. Utility Model Content

[0004] Since the surface of the component to be pressed may not be a flat structure (e.g., the component is locally bent or has a height difference), in this case, the flat plate hot pressing or rolling method cannot guarantee the uniformity of pressing at all positions of the component, thus affecting the pressing effect and battery performance.

[0005] The purpose of this invention is to provide a crimping device that can apply pressure evenly to all positions of the component to be crimped, ensuring uniform pressure application, improving the crimping effect and battery performance.

[0006] One embodiment of this utility model provides a crimping device, including a base, a sealing cover, and a pressure-applying component. The base is used to place the part to be crimped; the sealing cover is used to cooperate with the base to form a sealed space between the part and the base during crimping; the pressure-applying component is connected to the sealing cover and is used to apply pressure to a flexible medium in the sealed space so that the part to be crimped is pressed under the pressure of the flexible medium.

[0007] In one possible implementation, the flexible medium includes a gas located within the sealed space, and the pressurizing component is used to pressurize the gas within the sealed space to form a high-pressure gas, so as to apply pressure to the patch to be pressed through the high-pressure gas;

[0008] And / or, the flexible medium includes a flexible pressing member disposed within the sealed space, and the pressurizing member is used to squeeze the flexible pressing member to apply pressure to the object to be pressed through the flexible pressing member.

[0009] In one feasible manner, the flexible compression member includes a fluid bladder and / or a flexible membrane.

[0010] In one possible implementation, the pressurizing component includes a piston located within the sealing cover and slidably sealed to the inner wall of the sealing cover, the sealing space being formed between the sealing cover, the piston, and the base; the piston, when moving toward the base, can pressurize the flexible medium within the sealing space.

[0011] In one possible implementation, the pressurizing component further includes a piston rod and a drive device, the drive device being located outside the sealing cover, one end of the piston rod being connected to the drive device, and the other end of the piston rod passing through the sealing cover and being connected to the piston; the drive device is used to drive the piston to move closer to or away from the base within the sealing cover.

[0012] In one possible implementation, the drive device is connected to the sealing cover, and the drive device is also used to drive the sealing cover to move closer to or away from the base.

[0013] In one possible implementation, the piston rod has a hollow cavity communicating with the sealed space, and the hollow cavity has a pressure detection device for detecting the pressure within the sealed space.

[0014] In one possible implementation, the crimping device further includes a support frame comprising a support plate, a guide plate, and a plurality of first guide shafts, wherein the driving device is fixed to the support plate; the guide plate is located between the support plate and the sealing cover, one end of each first guide shaft is fixedly connected to the support plate, and the guide plate is slidably connected to each of the first guide shafts; the driving device is connected to the guide plate, and one end of the piston rod is connected to the guide plate; the driving device is used to drive the guide plate to move axially and retract along the first guide shafts.

[0015] In one possible implementation, the crimping device further includes a worktable, on which the base is disposed; the other end of each of the first guide shafts is fixedly connected to the worktable.

[0016] In one possible implementation, the guide plate is provided with a plurality of linear bearings, each of which is respectively sleeved on each of the first guide shafts.

[0017] In one possible implementation, the drive unit is connected to the guide plate via a floating joint.

[0018] In one possible implementation, the support frame further includes a plurality of second guide shafts, one end of each second guide shaft being fixedly connected to the sealing cover, and the other end of each second guide shaft being slidably connected to the guide plate; each second guide shaft is fitted with an elastic element, the opposite ends of the elastic element abutting against the guide plate and the sealing cover respectively.

[0019] In one possible implementation, the base includes a pressing seat for placing the part to be pressed, and the sealing cover has an opening at one end near the pressing seat; during pressing, the open end of the sealing cover abuts against the pressing seat, and the sealing space is formed between the sealing cover and the pressing seat.

[0020] In one possible implementation, the pressing base is provided with a plurality of vent holes, which penetrate the pressing base; during pressing, the gas between the workpiece to be pressed and the pressing base can be discharged through the vent holes.

[0021] In one possible implementation, the base further includes a flexible seal that covers the pressing seat, the flexible seal covering the part to be pressed and the vent hole.

[0022] In one possible implementation, the base further includes an annular limiting member that covers the edge of the flexible seal and is fixedly connected to the pressing seat.

[0023] In one possible implementation, a second sealing ring is provided on the top surface of the pressing base, the second sealing ring is disposed around the periphery of the part to be pressed, and the second sealing ring is located between the flexible seal and the pressing base.

[0024] In one possible implementation, the pressing base includes a base plate and a boss connected to the base plate, the boss protruding toward the sealing cover, the boss being used to place the part to be pressed, and the vent hole being disposed on the boss; during pressing, the sealing cover covers the boss, and the open end of the sealing cover abuts against the base plate, and the sealing space is formed between the sealing cover and the boss.

[0025] In one possible implementation, a third sealing ring is provided on the outer peripheral surface of the boss, and the third sealing ring is sandwiched between the outer peripheral surface of the boss and the inner wall of the sealing cover.

[0026] In one possible implementation, the crimping device further includes a heating element for heating the base.

[0027] In one possible implementation, the heating element includes a heat insulation element and a heating assembly, the heat insulation element being disposed below the base, and the heating assembly being disposed between the heat insulation element and the base.

[0028] In one possible implementation, the base has a groove on its bottom wall, and the heating assembly is disposed within the groove.

[0029] In one possible implementation, the heat insulation member is provided with a column that protrudes from the heat insulation member toward the base and extends into the groove; the column is provided with a temperature detection device for detecting the heating temperature of the base.

[0030] The crimping device provided by this utility model, by setting a base, a sealing cover, and a pressure-applying component, forms a sealed space by the cooperation of the sealing cover and the base during crimping, and applies pressure to the flexible medium within the sealed space by the pressure-applying component, thereby indirectly crimping the component to be crimped. Because the flexible medium can apply pressure evenly to all positions of the component to be crimped, compared to traditional flatbed hot pressing or rolling methods, this method of applying pressure to the component using a flexible medium ensures uniform pressure, thereby improving the crimping effect and ultimately improving battery performance. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the crimping device in an embodiment of this utility model.

[0032] Figure 2 for Figure 1 Front view after removing the load-bearing frame and hydraulic pump.

[0033] Figure 3 for Figure 2 Front view of the crimping device in the crimping state.

[0034] Figure 4 for Figure 3 A schematic diagram of the cross-section at position AA.

[0035] Figure 5 for Figure 4 A magnified view of a portion of the area at position B.

[0036] Figure 6 for Figure 5 A magnified view of a portion of the area at position C.

[0037] Figure 7 This is a schematic diagram showing the assembly relationship of the piston, piston rod, and sealing cover in an embodiment of this utility model.

[0038] Figure 8 for Figure 7A schematic diagram of the explosion structure.

[0039] Figure 9 This is a schematic diagram showing the assembly relationship between the base and the heating component in an embodiment of this utility model.

[0040] Figure 10 for Figure 9 A cross-sectional schematic diagram.

[0041] Figure 11 for Figure 9 A schematic diagram of the explosion structure.

[0042] Figure 12 This is a bottom view of the pressing seat in an embodiment of this utility model.

[0043] Figure 13 This is a partial cross-sectional schematic diagram of the crimping device in another embodiment of the present invention.

[0044] Figure 14 This is a partial cross-sectional schematic diagram of the crimping device in another embodiment of the present invention.

[0045] In the diagram: 1-Base, 11-Pressure seat, 110-Vent hole, 111-Base plate, 112-Boss, 1121-Mounting surface, 1122-Mounting groove, 12-Flexible seal, 13-Annular limiting element, 14-Second sealing ring, 15-Third sealing ring, 16-Groove, 17-Notch, 2-Sealing cover, 20-Sealing space, 21-Opening, 22-Through hole, 3-Pressurizing component, 31-Piston, 311-First sealing ring, 312-Vent hole, 32-Piston rod, 321-Hollow cavity, 33-Drive device, 331-Drive shaft, 34-Pressure detection device, 4-Flexible seal Components: 41-Fluid bladder, 411-Flexible outer skin, 412-Fluid, 42-Flexible membrane, 5-Support frame, 51-Support plate, 52-Guide plate, 53-First guide shaft, 54-Linear bearing, 55-Floating joint, 56-Second guide shaft, 561-Limiting protrusion, 57-Elastic component, 6-Workbench, 61-Bearing plate, 62-Bearing frame, 63-Hydraulic pump, 7-Heating component, 71-Insulation component, 711-Support platform, 712-Column, 7120-Center hole, 72-Heating assembly, 721-Heating coil, 722-Wire, 73-Temperature detection device, 8-Component to be pressed. Detailed Implementation

[0046] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0047] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0048] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed by this utility model.

[0049] like Figures 1 to 11 As shown, the crimping device provided in this embodiment includes a base 1, a sealing cover 2, and a pressure-applying component 3. The base 1 is used to place the component 8 to be crimped. Depending on the application scenario, the component 8 to be crimped can be a lithium foil, electrode sheet, electrode tab, or other components. The sealing cover 2 is located on one side of the base 1 and is used to cooperate with the base 1 to form a sealed space 20 between the sealing cover 2 and the base 1 during crimping.

[0050] The pressurizing component 3 is connected to the sealing cover 2. The pressurizing component 3 is used to apply pressure to the flexible medium in the sealing space 20 so that the part to be pressed 8 is pressed under the pressure of the flexible medium.

[0051] The crimping device provided in this embodiment of the utility model, by setting a base 1, a sealing cover 2, and a pressure-applying component 3, forms a sealed space 20 by the cooperation of the sealing cover 2 and the base 1 during crimping, and applies pressure to the flexible medium within the sealed space 20 by the pressure-applying component 3, thereby indirectly crimping the part 8 to be crimped. Since the flexible medium can apply pressure evenly to all positions of the part 8 to be crimped (even if the surface of the part 8 to be crimped is not flat), compared to traditional flatbed hot pressing or rolling pressing methods, this method of applying pressure to the part 8 using a flexible medium can ensure the uniformity of pressure, thereby improving the crimping effect and ultimately improving battery performance.

[0052] like Figures 1 to 5 As shown, in one embodiment, the flexible medium includes a gas (generally air) located in the sealed space 20. The pressurizing component 3 is used to pressurize the gas in the sealed space 20 during pressing to form a high-pressure gas (generally high-pressure air), so as to apply pressure to the part to be pressed 8 through the high-pressure gas, thereby pressing the part to be pressed 8 under the pressure of the high-pressure gas (the pressure of the high-pressure gas can act directly or indirectly on the part to be pressed 8).

[0053] like Figure 13As shown, in another embodiment, the flexible medium includes a flexible pressing member 4, which is disposed within the sealed space 20. The pressurizing member 3 is used to compress the flexible pressing member 4, thereby applying pressure to the object to be pressed 8 through the flexible pressing member 4 (the flexible pressing member 4 can directly or indirectly apply pressure to the object to be pressed 8), thus pressing the object to be pressed 8 under the pressure of the flexible pressing member 4. Since the flexible pressing member 4 is made of flexible material, its shape can adapt to the shape of the surface of the object to be pressed 8 during pressing, thereby uniformly transmitting the compressive force applied by the pressurizing member 3 to all parts of the object to be pressed 8. In one embodiment, when the pressurizing component 3 is pressing the flexible pressing component 4, the pressurizing component 3 can also pressurize the gas in the sealed space 20 to form high-pressure gas. The pressure of the high-pressure gas in the sealed space 20 can also act on the flexible pressing component 4, so that the pressure of the high-pressure gas is evenly applied to the pressing component 8 through the flexible pressing component 4 (that is, the above-mentioned flexible medium includes both gas and flexible pressing component 4).

[0054] like Figure 13 As shown, in one embodiment, the flexible compression fitting 4 includes a fluid bladder 41, which can be a liquid bladder or an air bladder, etc. Specifically, the fluid bladder 41 includes a flexible outer skin 411 and a fluid 412 disposed within the flexible outer skin 411, which can be a liquid or a gas, etc. When the pressure member 3 squeezes the fluid bladder 41, the shape of the fluid bladder 41 can adapt to the shape of the surface of the part to be compressed 8, thereby uniformly transmitting the squeezing force applied by the pressure member 3 to the fluid bladder 41 to various parts of the part to be compressed 8.

[0055] like Figure 14 As shown, in another embodiment, the flexible pressing member 4 includes a flexible film 42, which can be made of materials such as silicone or thermoplastic elastomer. When the pressing member 3 squeezes the flexible film 42, the shape of the flexible film 42 can adapt to the shape of the surface of the part to be pressed 8, thereby uniformly transmitting the squeezing force applied by the pressing member 3 to the flexible film 42 to various parts of the part to be pressed 8.

[0056] like Figures 4 to 8As shown, in one embodiment, the pressurizing component 3 includes a piston 31, which is located inside the sealing cover 2 and slidably and sealingly connected to the inner wall of the sealing cover 2 (specifically, the outer peripheral surface of the piston 31 is slidably and sealingly connected to the inner wall of the sealing cover 2). The piston 31 can move within the sealing cover 2 toward the side closer to or away from the base 1. During pressing, a sealing space 20 is formed between the sealing cover 2, the piston 31, and the base 1. When the piston 31 moves toward the side closer to the base 1, it can pressurize the flexible medium within the sealing space 20. Specifically, in this embodiment, when the piston 31 moves toward the side closer to the base 1, it can compress the gas within the sealing space 20, so that the gas within the sealing space 20 is compressed into a high-pressure gas.

[0057] Of course, in other embodiments, the pressurizing component 3 can also pressurize the flexible medium within the sealed space 20 in other ways. For example, the pressurizing component 3 includes an air compressor (not shown) connected to the sealing cover 2. The air compressor is used to compress air and deliver the compressed high-pressure air to the sealing cover 2, thereby pressurizing the flexible medium within the sealed space 20.

[0058] like Figure 13 As shown, in another embodiment, the flexible medium includes a flexible pressing member 4, which is disposed within the sealed space 20. When the piston 31 moves toward the side closer to the base 1, it can squeeze the flexible pressing member 4 to apply pressure to the object to be pressed 8 through the flexible pressing member 4 (that is, the piston 31 directly contacts the flexible pressing member 4 to apply a squeezing force to the flexible pressing member 4, and the flexible pressing member 4 then evenly transmits the squeezing force applied by the piston 31 to the object to be pressed 8).

[0059] like Figures 4 to 8 As shown, in one embodiment, a first sealing ring 311 is provided on the outer peripheral surface of the piston 31. The first sealing ring 311 is sandwiched between the outer peripheral surface of the piston 31 and the inner wall of the sealing cover 2, thereby ensuring the seal between the piston 31 and the sealing cover 2, and thus facilitating the piston 31 to compress the gas in the sealing space 20.

[0060] like Figures 4 to 8 As shown, in one embodiment, there are multiple first sealing rings 311 (two are shown in the figure), and the multiple first sealing rings 311 are spaced apart along the axial direction of the piston 31, thereby improving the sealing effect.

[0061] like Figures 1 to 8As shown, in one embodiment, the pressurizing component 3 also includes a piston rod 32 and a driving device 33. The driving device 33 is located outside the sealing cover 2. One end of the piston rod 32 is connected to the driving device 33, and the other end of the piston rod 32 passes through the sealing cover 2 and is connected to the piston 31. The driving device 33 is used to drive the piston 31 to move within the sealing cover 2 toward the side closer to or away from the base 1. During pressing, the driving device 33 drives the piston 31 to extend toward the direction closer to the base 1 to pressurize the gas in the sealed space 20. After pressing is completed, the driving device 33 drives the piston 31 to retract toward the direction away from the base 1, thereby preparing for the next pressing operation.

[0062] Specifically, in this embodiment, the pressurizing component 3 and the sealing cover 2 are both located directly above the base 1. The driving device 33, the piston rod 32 and the sealing cover 2 are arranged sequentially from top to bottom. The top end of the piston rod 32 is connected to the driving device 33. The top of the sealing cover 2 is provided with a through hole 22. The bottom end of the piston rod 32 passes through the through hole 22 on the sealing cover 2 and is connected to the piston 31. The driving device 33 is used to drive the piston 31 to move up and down inside the sealing cover 2.

[0063] like Figures 4 to 8 As shown, in one embodiment, the piston rod 32 has a hollow cavity 321 communicating with the sealed space 20. A pressure detection device 34 is installed within the hollow cavity 321. The pressure detection device 34 is used to detect the pressure within the sealed space 20 (in this embodiment, the pressure detection device 34 is used to detect the air pressure within the sealed space 20), thereby controlling the movement distance of the piston 31 based on the pressure value detected by the pressure detection device 34. This arrangement facilitates the installation of the pressure detection device 34.

[0064] like Figures 4 to 8 As shown, in one embodiment, a vent 312 is provided on the piston 31 at a position corresponding to the hollow cavity 321, and the hollow cavity 321 communicates with the sealed space 20 through the vent 312. A portion of the pressure detection device 34 is located inside the hollow cavity 321, and another portion is located inside the vent 312. The pressure detection device 34 seals (blocks) the vent 312, thereby preventing gas leakage from the sealed space 20 (specifically, the pressure detection device 34 is fixed to the vent 312 by its own threads on its outer periphery). Of course, in other embodiments, the pressure detection device 34 may also be located entirely inside the hollow cavity 321.

[0065] like Figures 1 to 8As shown, in one embodiment, the crimping device further includes a support frame 5, which includes a support plate 51, a guide plate 52, and a plurality of first guide shafts 53. A drive device 33 is fixed to the support plate 51. The guide plate 52 is located between the support plate 51 and the sealing cover 2. One end of each first guide shaft 53 is fixedly connected to the support plate 51, and the guide plate 52 is slidably connected to each first guide shaft 53. The drive device 33 is connected to the guide plate 52, and one end of the piston rod 32 is connected to the guide plate 52. The drive device 33 is used to drive the guide plate 52 to extend and retract axially along the first guide shafts 53, thereby driving the piston rod 32 and the piston 31 to extend and retract axially along the first guide shafts 53.

[0066] The crimping device also includes a worktable 6, on which a base 1 is mounted and which serves to bear weight. The other end of each first guide shaft 53 is fixedly connected to the worktable 6.

[0067] Specifically, in this embodiment, the workbench 6 includes a support frame 62 and a support plate 61 disposed on the support frame 62, with a base 1 disposed on the support plate 61. A support plate 51 and a sealing cover 2 are located on the upper and lower sides of the guide plate 52, respectively. Each first guide shaft 53 extends vertically, with its top end fixedly connected to the support plate 51 and its bottom end passing through the guide plate 52 and fixedly connected to the support plate 61. The top end of the piston rod 32 is connected to the lower surface of the guide plate 52, and the drive shaft 331 of the drive device 33 is connected to the upper surface of the guide plate 52. The drive device 33 is used to drive the guide plate 52 to move vertically and horizontally relative to the first guide shaft 53, thereby driving the piston rod 32 and piston 31 to move vertically and horizontally. The first guide shaft 53 serves as a guide to ensure that the guide plate 52, piston rod 32 and piston 31 do not shift their positions when they move up and down, thereby ensuring the smooth movement of the guide plate 52, piston rod 32 and piston 31; at the same time, the first guide shaft 53 can support the support frame 5 and the pressurizing component 3.

[0068] Specifically, in this embodiment, the load-bearing plate 61 is fixed above the load-bearing frame 62 by bolts. The top end of the first guide shaft 53 is fixed to the support plate 51 by a nut, and the bottom end of the first guide shaft 53 is fixed to the load-bearing plate 61 by a nut. The drive device 33 is fixed to the middle position of the support plate 51 by bolts, and the top end of the piston rod 32 is connected to the guide plate 52 by bolts.

[0069] like Figures 1 to 4 As shown, in one embodiment, there are multiple first guide shafts 53, which are arranged at intervals along the circumference of the guide plate 52. By providing multiple first guide shafts 53, the smooth movement of the guide plate 52, piston rod 32, and piston 31, as well as the support stability of the support frame 5 and the pressurizing component 3, are further ensured.

[0070] like Figures 1 to 4 As shown, in one embodiment, both the support plate 51 and the guide plate 52 are square structures, and there are four first guide shafts 53. The four first guide shafts 53 are respectively set at the four apex positions of the support plate 51 and the four apex positions of the guide plate 52.

[0071] like Figures 1 to 4 As shown, in one embodiment, the guide plate 52 is provided with a plurality of linear bearings 54, each linear bearing 54 being sleeved on each first guide shaft 53 (i.e., the first guide shaft 53 passes through the linear bearing 54), and the linear bearing 54 can slide relative to the first guide shaft 53. By providing linear bearings 54, the smoothness and stability of the guide plate 52 during telescopic movement can be improved, and the wear caused by direct contact between the first guide shaft 53 and the guide plate 52 can be reduced.

[0072] Specifically, in this embodiment, there are four linear bearings 54, which are respectively mounted on four first guide shafts 53. The linear bearings 54 are fixed to the guide plate 52 by bolts.

[0073] like Figures 1 to 4 As shown, in one embodiment, the drive device 33 is connected to the guide plate 52 via a floating joint 55. The floating joint 55 can absorb and reduce the eccentricity and angle between the drive device 33 and the guide plate 52, reduce the relative accuracy requirements between the drive device 33 and the guide plate 52, and enable the drive device 33 and the guide plate 52 to work smoothly within the allowable eccentricity range.

[0074] Specifically, in this embodiment, the drive shaft 331, piston rod 32, and piston 31 of the drive device 33 are coaxially arranged. The drive shaft 331 of the drive device 33 is connected to the guide plate 52 through a floating joint 55. The drive shaft 331 of the drive device 33 is connected to the floating joint 55 through a threaded head, and the floating joint 55 is fixedly connected to the guide plate 52 by bolts.

[0075] like Figure 1 As shown, in one embodiment, the drive device 33 is a hydraulic cylinder; a hydraulic pump 63 is provided inside the load-bearing frame 62, and the hydraulic pump 63 is connected to the drive device 33, thereby providing hydraulic driving force to the drive device 33. Of course, in other embodiments, the drive device 33 can also be other linear motion mechanisms, such as pneumatic cylinders, electric cylinders, etc.

[0076] Specifically, in this embodiment, the hydraulic pump 63 is fixed to the bottom of the load-bearing frame 62 by a shock-absorbing pad and a matching nut, and the remaining electrical control components are installed on an electrical board on the side of the load-bearing frame 62.

[0077] like Figures 1 to 4 As shown, in one embodiment, the driving device 33 is also connected to the sealing cover 2. The driving device 33 is also used to drive the sealing cover 2 to move toward the side closer to or away from the base 1 (specifically, the driving device 33 is used to drive the sealing cover 2 to move up and down). During pressing, the driving device 33 drives the sealing cover 2 to extend toward the direction closer to the base 1 so that the sealing cover 2 and the base 1 cooperate to form a sealing space 20 between them; after pressing is completed, the driving device 33 drives the sealing cover 2 to retract toward the direction away from the base 1, thereby facilitating the removal of the part 8 to be pressed from the base 1 and preparing for the next pressing operation.

[0078] like Figures 1 to 4 As shown, in one embodiment, the support frame 5 further includes several second guide shafts 56. One end of each second guide shaft 56 is fixedly connected to the sealing cover 2, and the other end of each second guide shaft 56 is slidably connected to the guide plate 52. Each second guide shaft 56 is fitted with an elastic element 57, and the opposite ends of the elastic element 57 abut against the guide plate 52 and the sealing cover 2, respectively. The elastic element 57 is used to apply pressure to the sealing cover 2 during pressing, so that the sealing cover 2 is in close contact with the base 1, and to drive the sealing cover 2 to reset after pressing is completed.

[0079] Specifically, in this embodiment, the second guide shaft 56 extends vertically, and its bottom end is fixedly connected to the sealing cover 2 via its own thread. The top end of the second guide shaft 56 passes through the guide plate 52 to achieve a sliding connection between the second guide shaft 56 and the guide plate 52. The top end of the second guide shaft 56 is provided with a limiting protrusion 561, which can abut against the guide plate 52 to prevent the second guide shaft 56 from disengaging from the guide plate 52. The elastic element 57 is a spring, which is sleeved on the second guide shaft 56, and its two ends abut against the guide plate 52 and the sealing cover 2, respectively.

[0080] When the drive device 33 drives the guide plate 52 to move downward, the guide plate 52, the sealing cover 2, and the piston rod 32 move downward a certain distance, and the sealing cover 2 comes into contact with the base 1. The drive device 33 continues to drive the guide plate 52 to move downward. At this time, the elastic element 57 is compressed, and the elastic element 57 applies elastic force to the sealing cover 2, so that the sealing cover 2 is in close contact with the base 1 to ensure the sealing of the sealing space 20. At the same time, the piston rod 32 and the piston 31 continue to move downward, thereby compressing the gas in the sealing space 20 to perform the pressing work. After the pressing work is completed, the drive device 33 drives the guide plate 52 to move upward, and the guide plate 52, piston rod 32 and piston 31 retract upward. The sealing cover 2 resets during the rebound of the elastic element 57 (that is, the piston 31 moves upward inside the sealing cover 2, while the elastic element 57 of the sealing cover 2 does not move under the elastic force). The drive device 33 continues to drive the guide plate 52 to move upward, and the sealing cover 2 retracts upward together with the guide plate 52, piston rod 32 and piston 31, thus preparing for the next pressing work.

[0081] like Figures 1 to 4 As shown, in one embodiment, there are multiple second guide shafts 56, which are arranged at intervals along the circumference of the sealing cover 2, thereby improving the motion stability of the sealing cover 2.

[0082] Specifically, in this embodiment, there are four second guide shafts 56, which are evenly spaced along the circumference of the sealing cover 2, and each second guide shaft 56 is fitted with an elastic element 57.

[0083] like Figures 4 to 12 As shown, in one embodiment, the base 1 includes a pressing seat 11 for placing the part to be pressed 8. An opening 21 is provided on one end of the sealing cover 2 facing the pressing seat 11 (specifically, the opening 21 is located at the bottom end of the sealing cover 2). During pressing, the opening end of the sealing cover 2 (i.e., the end of the sealing cover 2 with the opening 21) abuts against the pressing seat 11, and the sealing cover 2 covers the part to be pressed 8 on the pressing seat 11. A sealing space 20 is formed between the sealing cover 2 and the pressing seat 11 (specifically, the sealing space 20 is formed between the sealing cover 2, the piston 31, and the pressing seat 11).

[0084] like Figures 9 to 12 As shown, in one embodiment, the pressing base 11 is provided with a plurality of vent holes 110, which penetrate the pressing base 11 (specifically, the vent holes 110 penetrate the pressing base 11 vertically) and are connected to the outside. During pressing, the part to be pressed 8 covers the vent holes 110, and the gas between the part to be pressed 8 and the pressing base 11 can be discharged through the vent holes 110.

[0085] Specifically, since air may exist between the part to be pressed 8 and the pressing seat 11 when the part to be pressed 8 is placed on the pressing seat 11, by providing an exhaust hole 110 on the pressing seat 11, the air between the part to be pressed 8 and the pressing seat 11 can be discharged through the exhaust hole 110 during pressing, so that the part to be pressed 8 is completely adhered to the pressing seat 11, thereby improving the uniformity of pressing (if the air between the part to be pressed 8 and the pressing seat 11 is not discharged, during the pressing process, this part of the air will squeeze the part to be pressed 8, which may cause the part to be pressed 8 to bulge or other phenomena, affecting the uniformity of pressing the part to be pressed 8).

[0086] like Figures 9 to 12 As shown, in one embodiment, there are multiple vent holes 110, which are evenly spaced on the pressing base 11. By providing multiple vent holes 110, the diameter of each vent hole 110 can be set to be smaller, thereby preventing the part to be pressed 8 from sinking into the vent hole 110 during the pressing process and affecting the flatness of the part to be pressed 8 (if the diameter of the vent hole 110 is too large, the part to be pressed 8 may sink into the vent hole 110 under pressure, resulting in defects such as pits on the part to be pressed 8).

[0087] In one embodiment, the diameter of the vent hole 110 is 0.2 mm to 0.5 mm.

[0088] like Figures 4 to 6 and Figures 9 to 11 As shown, in one embodiment, the base 1 also includes a flexible seal 12, which covers the pressing seat 11 and covers the part to be pressed 8 and the vent 110, that is, the part to be pressed 8 is located between the flexible seal 12 and the pressing seat 11.

[0089] Specifically, by providing a flexible seal 12 that covers the part to be pressed 8 and the vent 110, the flexible seal 12 prevents gas from entering between the part to be pressed 8 and the pressing seat 11 within the sealed space 20. Simultaneously, the flexible seal 12 seals the vent 110 to prevent gas from escaping through the vent 110, thus creating a high-pressure environment within the sealed space 20. Furthermore, because the flexible seal 12 is made of a flexible material, during pressing, the high-pressure gas acts on it, and the shape of the flexible seal 12 adapts to the surface shape of the part to be pressed 8, thereby evenly transmitting the pressure applied by the high-pressure gas to all parts of the part to be pressed 8, improving the uniformity of pressing. The flexible seal 12 can be made of materials such as silicone or thermoplastic elastomer.

[0090] like Figures 4 to 6 and Figures 9 to 11As shown, in one embodiment, the base 1 also includes an annular limiting member 13. The annular limiting member 13 has an annular structure and is disposed on the edge of the flexible sealing member 12 (the part of the flexible sealing member 12 that covers the part to be pressed 8 is not covered by the annular limiting member 13). The annular limiting member 13 is fixedly connected to the pressing seat 11, that is, the edge of the flexible sealing member 12 is sandwiched between the annular limiting member 13 and the pressing seat 11.

[0091] Specifically, by providing an annular limiting member 13, the annular limiting member 13 can tightly press and fix the edge of the flexible sealing member 12 onto the pressing seat 11, thereby preventing gas in the sealing space 20 from entering the space between the part to be pressed 8 and the pressing seat 11 through the gap between the edge of the flexible sealing member 12 and the pressing seat 11. The annular limiting member 13 and the pressing seat 11 are fixedly connected by bolts. In this embodiment, the flexible sealing member 12 has a circular sheet structure, and the shape of the annular limiting member 13 is adapted to the shape of the flexible sealing member 12; the annular limiting member 13 has a circular annular structure. Of course, in other embodiments, the flexible sealing member 12 can also be a rectangular, polygonal, or other structure, and the annular limiting member 13 can also be a square annular, polygonal annular, or other structure (the annular limiting member 13 can even be formed by multiple strips).

[0092] like Figures 4 to 6 and Figures 9 to 11 As shown, in one embodiment, a second sealing ring 14 is provided on the top surface of the pressing seat 11. The second sealing ring 14 surrounds the periphery of the part 8 to be pressed, and the flexible sealing element 12 covers the second sealing ring 14, that is, the second sealing ring 14 is located between the flexible sealing element 12 and the pressing seat 11. By providing the second sealing ring 14, the second sealing ring 14 can further seal the flexible sealing element 12 and the pressing seat 11, thereby further preventing gas in the sealing space 20 from entering the space between the part 8 to be pressed and the pressing seat 11 from the gap between the edge of the flexible sealing element 12 and the pressing seat 11.

[0093] like Figure 5 and Figure 6 As shown, in one embodiment, the second sealing ring 14 is provided corresponding to the annular limiting member 13, that is, the second sealing ring 14 is sandwiched between the pressing seat 11 and the annular limiting member 13. The annular limiting member 13 can squeeze the second sealing ring 14 so that the second sealing ring 14 can play a better sealing role.

[0094] like Figures 4 to 6 and Figures 9 to 12As shown, in one embodiment, the pressing base 11 includes a base plate 111 and a boss 112 connected to the base plate 111 (in this embodiment, the boss 112 and the base plate 111 are an integral structure). The boss 112 protrudes towards the sealing cover 2 (i.e., the boss 112 protrudes upward relative to the base plate 111). The boss 112 is used to place the part 8 to be pressed. An exhaust hole 110 is provided on the boss 112 and penetrates through the boss 112 (specifically, the exhaust hole 110 penetrates the boss 112 vertically). During pressing, the sealing cover 2 covers the boss 112, and the open end of the sealing cover 2 abuts against the base plate 111. A sealing space 20 is formed between the sealing cover 2 and the boss 112 (specifically, the sealing space 20 is formed between the sealing cover 2, the piston 31, and the boss 112).

[0095] like Figure 11 As shown, in one embodiment, the top surface of the boss 112 is provided with a mounting surface 1121. The mounting surface 1121 is located in the middle of the top surface of the boss 112. The mounting surface 1121 is used to place the component to be pressed 8. The vent hole 110 is provided corresponding to the mounting surface 1121. The flexible seal 12 covers the mounting surface 1121.

[0096] like Figure 11 As shown, in one embodiment, the top surface of the boss 112 is provided with a mounting groove 1122, which surrounds the periphery of the mounting surface 1121. The mounting groove 1122 is located between the edge of the mounting surface 1121 and the edge of the boss 112. The second sealing ring 14 is disposed in the mounting groove 1122. The flexible sealing member 12 covers the mounting groove 1122, and the edge of the flexible sealing member 12 is located between the edge of the mounting groove 1122 and the edge of the boss 112.

[0097] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, in one embodiment, the sealing cover 2 has a cylindrical structure, and the boss 112 has a frustum-shaped structure that conforms to the shape of the sealing cover 2.

[0098] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, in one embodiment, a third sealing ring 15 is provided on the outer peripheral surface of the boss 112. When pressed, the third sealing ring 15 is sandwiched between the outer peripheral surface of the boss 112 and the inner wall of the sealing cover 2, thereby preventing the gas in the sealing space 20 from being discharged from the gap between the outer peripheral surface of the boss 112 and the inner wall of the sealing cover 2.

[0099] like Figure 4 , Figure 5 and Figures 9 to 11As shown, in one embodiment, there are multiple third sealing rings 15 (two are shown in the figure). The multiple third sealing rings 15 are spaced apart along the axial direction of the boss 112 to achieve a better sealing effect.

[0100] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, in one embodiment, the crimping device also includes a heating component 7. The heating component 72 is used to heat the base 1 (specifically, to heat the pressing seat 11), thereby heating the part to be pressed 8 so that the part to be pressed 8 is pressed at a preset temperature.

[0101] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, in one embodiment, the heating component 7 includes a heat insulation component 71 and a heating component 72. The heat insulation component 71 is disposed below the base 1, and the heating component 72 is disposed between the heat insulation component 71 and the base 1. Specifically, in this embodiment, the heat insulation component 71 is mounted on the load-bearing plate 61, and the base 1 is disposed on the heat insulation component 71.

[0102] like Figures 9 to 12 As shown, in one embodiment, the bottom wall of the base 1 is provided with a groove 16, and the heating component 72 is disposed in the groove 16. A support platform 711 is provided on the heat insulation member 71, protruding from the heat insulation member 71 toward the base 1 (i.e., the support platform 711 protrudes upward from the heat insulation member 71), and extends into the groove 16. The heating component 72 rests on the support platform 711 and contacts the base 1, thereby better heating the base 1. Simultaneously, the dimensions of the support platform 711 match the dimensions of the groove 16, thereby limiting the position of the base 1 and facilitating the positioning and assembly of the base 1 and the heat insulation member 71.

[0103] like Figures 9 to 12 As shown, in one embodiment, the heat insulation member 71 is provided with a column 712, which protrudes from the heat insulation member 71 toward the base 1 (i.e., the column 712 protrudes upward from the heat insulation member 71) and extends into the groove 16. The column 712 is located in the support platform 711. The heating assembly 72 includes a heating coil 721, which is located in the groove 16. The heating coil 721 rests on the support platform 711 and is sleeved on the column 712, thereby limiting and fixing the heating coil 721.

[0104] like Figures 9 to 11As shown, in one embodiment, the heating assembly 72 also includes a wire 722. A notch 17 is provided on one side of the base 1. One end of the wire 722 is connected to the heating coil 721, and the other end of the wire 722 extends out of the base 1 through the notch 17 and is connected to a power supply device (not shown).

[0105] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, in one embodiment, the column 712 is provided with a temperature detection device 73, which is in contact with the base 1. The temperature detection device 73 is used to detect the heating temperature of the base 1, thereby facilitating the control of the heating temperature of the heating component 72.

[0106] Specifically, the column 712 is provided with a central hole 7120, and the temperature detection device 73 is installed in the central hole 7120. The temperature detection device 73 is fixed to the column 712 by a nut.

[0107] The working principle of the crimping device in this embodiment is as follows:

[0108] (1) In the normal state (i.e., non-pressing state), the drive shaft 331 of the drive device 33 retracts upward, the guide plate 52 and the sealing cover 2 are located above the base 1, the sealing cover 2 pops downward under the action of the elastic member 57, and the piston 31 is located at the top of the sealing cover 2. The operator places the part to be pressed 8 on the pressing seat 11, and then places the flexible sealing member 12 on the pressing seat 11, which completely covers the part to be pressed 8. Then, the annular limiting member 13 is pressed on the flexible sealing member 12, and the annular limiting member 13 is fixed to the pressing seat 11 with bolts to ensure that the gas in the sealing space 20 will not leak during the pressing process. Then, the heating component 72 is turned on to heat the base 1; after the temperature of the base 1 rises to the set temperature, the preliminary preparation work is completed, and the pressing work begins.

[0109] (2) During the pressing process, the entire pressing process is divided into two stages: the sealing cover 2 pressing stage and the air compression stage. The drive device 33 drives the guide plate 52 to move downward. After the sealing cover 2 moves downward a certain distance, it contacts the base 1 and is completely pressed. The sealing cover 2 pressing stage is completed. The drive device 33 continues to drive the guide plate 52 to move downward. The piston rod 32 and piston 31 move downward and compress the air in the sealing space 20 to form high-pressure air (when the sealing space 20 is equipped with a flexible pressing element 4, the piston 31 also squeezes the flexible pressing element 4). The pressing element 8 is pressed under the pressure of the high-pressure gas (and / or the flexible pressing element 4). At the same time, in the air compression stage, as the guide plate 52 moves downward continuously, the elastic element 57 is continuously compressed, so that the elastic element 57 can apply a greater elastic force to the sealing cover 2 to press the sealing cover 2, avoiding air leakage between the sealing cover 2 and the base 1 due to excessive pressure in the sealing space 20.

[0110] Once the pressure within the sealed space 20 reaches the specified pressure, the pressure within the sealed space 20 is maintained constant for a period of time to improve the pressing effect. After pressing is completed, the drive device 33 drives the guide plate 52, piston rod 32, and sealing cover 2 to retract upwards. The sealing cover 2 resets during the rebound of the elastic element 57, thus preparing for the next pressing operation.

[0111] The crimping device provided in this embodiment of the invention, by setting a base 1, a sealing cover 2, and a pressure-applying component 3, forms a sealed space 20 by the cooperation of the sealing cover 2 and the base 1 during crimping. The pressure-applying component 3 applies pressure to the flexible medium within the sealed space 20, thereby indirectly crimping the component to be crimped 8. Because the flexible medium can apply pressure evenly to all positions of the component to be crimped 8, compared with traditional flat plate hot pressing or rolling pressing methods, this method of applying pressure to the component to be crimped 8 using a flexible medium can ensure the uniformity of pressure, thereby improving the crimping effect and thus improving the battery performance.

[0112] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A crimping device, characterized in that, The device includes a base (1), a sealing cover (2), and a pressure-applying component (3). The base (1) is used to place the part to be pressed (8). The sealing cover (2) is used to cooperate with the base (1) to form a sealed space (20) between the part and the base (1) during pressing. The pressure-applying component (3) is connected to the sealing cover (2) and is used to apply pressure to the flexible medium in the sealed space (20) so that the part to be pressed (8) is pressed under the pressure of the flexible medium.

2. The crimping device as described in claim 1, characterized in that, The flexible medium includes gas located in the sealed space (20), and the pressurizing component (3) is used to pressurize the gas in the sealed space (20) to form high-pressure gas, so as to apply pressure to the pressure-to-press patch (8) through the high-pressure gas; And / or, the flexible medium includes a flexible pressing element (4) disposed within the sealed space (20), and the pressurizing member (3) is used to squeeze the flexible pressing element (4) to apply pressure to the object to be pressed (8) through the flexible pressing element (4).

3. The crimping device as described in claim 2, characterized in that, The flexible compression fitting (4) includes a fluid bladder (41) and / or a flexible membrane (42).

4. The crimping device as described in claim 1, characterized in that, The pressurizing component (3) includes a piston (31), which is located inside the sealing cover (2) and is slidably and sealingly connected to the inner wall of the sealing cover (2). The sealing space (20) is formed between the sealing cover (2), the piston (31) and the base (1). When the piston (31) moves toward the base (1), it can pressurize the flexible medium in the sealing space (20).

5. The crimping device as described in claim 4, characterized in that, The pressurizing component (3) also includes a piston rod (32) and a driving device (33). The driving device (33) is located outside the sealing cover (2). One end of the piston rod (32) is connected to the driving device (33), and the other end of the piston rod (32) passes through the sealing cover (2) and is connected to the piston (31). The driving device (33) is used to drive the piston (31) to move closer to or further away from the base (1) inside the sealing cover (2).

6. The crimping device as described in claim 5, characterized in that, The drive device (33) is connected to the sealing cover (2), and the drive device (33) is also used to drive the sealing cover (2) to move closer to or away from the base (1).

7. The crimping device as described in claim 5, characterized in that, The piston rod (32) is provided with a hollow cavity (321) communicating with the sealed space (20). The hollow cavity (321) is provided with a pressure detection device (34) for detecting the pressure in the sealed space (20).

8. The crimping device as described in claim 5, characterized in that, The crimping device further includes a support frame (5), which includes a support plate (51), a guide plate (52), and a plurality of first guide shafts (53). The driving device (33) is fixed on the support plate (51). The guide plate (52) is located between the support plate (51) and the sealing cover (2). One end of each first guide shaft (53) is fixedly connected to the support plate (51), and the guide plate (52) is slidably connected to each first guide shaft (53). The driving device (33) is connected to the guide plate (52), and one end of the piston rod (32) is connected to the guide plate (52). The driving device (33) is used to drive the guide plate (52) to move axially along the first guide shaft (53).

9. The crimping device as described in claim 8, characterized in that, The crimping device also includes a worktable (6), and the base (1) is disposed on the worktable (6); the other end of each of the first guide shafts (53) is fixedly connected to the worktable (6).

10. The crimping device as described in claim 8, characterized in that, The guide plate (52) is provided with a plurality of linear bearings (54), and each linear bearing (54) is respectively sleeved on each of the first guide shafts (53).

11. The crimping device as described in claim 8, characterized in that, The drive unit (33) is connected to the guide plate (52) via a floating joint (55).

12. The crimping device as described in claim 8, characterized in that, The support frame (5) further includes a plurality of second guide shafts (56), one end of each second guide shaft (56) is fixedly connected to the sealing cover (2), and the other end of each second guide shaft (56) is slidably connected to the guide plate (52); each second guide shaft (56) is fitted with an elastic element (57), and the opposite ends of the elastic element (57) abut against the guide plate (52) and the sealing cover (2) respectively.

13. The crimping device as claimed in claim 1, characterized in that, The base (1) includes a pressing seat (11) for placing the part to be pressed (8), and the sealing cover (2) has an opening (21) at one end near the pressing seat (11); during pressing, the opening end of the sealing cover (2) abuts against the pressing seat (11), and the sealing space (20) is formed between the sealing cover (2) and the pressing seat (11).

14. The crimping device as described in claim 13, characterized in that, The pressing base (11) is provided with a plurality of vent holes (110), and the vent holes (110) penetrate the pressing base (11); during pressing, the gas between the part to be pressed (8) and the pressing base (11) can be discharged through the vent holes (110).

15. The crimping device as described in claim 14, characterized in that, The base (1) also includes a flexible seal (12), which covers the pressing seat (11) and covers the part to be pressed (8) and the vent (110).

16. The crimping device as described in claim 15, characterized in that, The base (1) also includes an annular limiting member (13), which covers the edge of the flexible sealing member (12) and is fixedly connected to the pressing seat (11).

17. The crimping device as described in claim 15, characterized in that, The top surface of the pressing seat (11) is provided with a second sealing ring (14), which surrounds the periphery of the part to be pressed (8) and is located between the flexible sealing element (12) and the pressing seat (11).

18. The crimping device as claimed in claim 14, characterized in that, The pressing base (11) includes a base plate (111) and a boss (112) connected to the base plate (111). The boss (112) protrudes towards the sealing cover (2) and is used to place the part to be pressed (8). The vent (110) is provided on the boss (112). During pressing, the sealing cover (2) covers the boss (112) and the open end of the sealing cover (2) abuts against the base plate (111). The sealing space (20) is formed between the sealing cover (2) and the boss (112).

19. The crimping device as described in claim 18, characterized in that, A third sealing ring (15) is provided on the outer peripheral surface of the boss (112), and the third sealing ring (15) is sandwiched between the outer peripheral surface of the boss (112) and the inner wall of the sealing cover (2).

20. The crimping device according to any one of claims 1-19, characterized in that, The crimping device further includes a heating component (7) for heating the base (1).

21. The crimping device as described in claim 20, characterized in that, The heating component (7) includes a heat insulation component (71) and a heating assembly (72). The heat insulation component (71) is disposed below the base (1), and the heating assembly (72) is disposed between the heat insulation component (71) and the base (1).

22. The crimping device as described in claim 21, characterized in that, The base (1) has a groove (16) on its bottom wall, and the heating component (72) is disposed in the groove (16).

23. The crimping device as described in claim 22, characterized in that, The heat insulation component (71) is provided with a column (712), the column (712) protrudes from the heat insulation component (71) toward the base (1), and the column (712) extends into the groove (16); the column (712) is provided with a temperature detection device (73), the temperature detection device (73) is used to detect the heating temperature of the base (1).

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