Crimping device

Abstract

The invention 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] The invention relates to the technical field of battery manufacturing, and in particular to a crimping device. Background Art

[0002] During the preparation of batteries, some components usually need to be pressed, such as pressing lithium foil on the surface of a battery cell component, or pressing the electrode sheet and diaphragm in the battery cell, or pressing the tabs of multiple battery cells to achieve electrical connection between the battery cells.

[0003] At present, the parts to be pressed are generally pressed by flat plate hot pressing or rolling pressing. Taking flat plate hot pressing as an example, the parts to be pressed are placed between two flat hot pressing blocks in the hot pressing machine, and the hot pressing blocks provide a certain pressure and temperature to hot press and shape the parts to be pressed, thereby achieving the effect of pressing. Summary of the invention

[0004] Since the surface of the component to be pressed may not be a flat structure (for example, the component to be pressed is partially bent or has a height difference, etc.), in this case, the flat-plate hot pressing or rolling method cannot ensure the uniformity of pressing at all positions of the component to be pressed, thereby affecting the pressing effect and battery performance.

[0005] The object of the present invention is to provide a crimping device which can uniformly apply pressure to each position of a component to be pressed, thereby ensuring the uniformity of the pressurization of the component to be pressed, and improving the pressing effect and the performance of the battery.

[0006] An embodiment of the present invention provides a crimping device, comprising a base, a sealing cover and a pressurizing component, wherein the base is used to place a piece to be pressed; the sealing cover is used to cooperate with the base to form a sealed space between the base and the base during pressing; the pressurizing component is connected to the sealing cover, and the pressurizing component is used to apply pressure to a flexible medium in the sealed space so that the piece to be pressed is pressed under the pressure of the flexible medium.

[0007] In one achievable manner, the flexible medium includes gas in the sealed space, and the pressurizing component is used to pressurize the gas in the sealed space to form high-pressure gas, so as to apply pressure to the component to be pressed by the high-pressure gas;

[0008] And / or, the flexible medium comprises a flexible pressing member arranged in the sealed space, and the pressurizing component is used to press the flexible pressing member so as to apply pressure to the member to be pressed through the flexible pressing member.

[0009] In one achievable manner, the flexible pressing member includes a fluid bag and / or a flexible film.

[0010] In one feasible manner, the pressurizing component includes a piston, which is located in the sealing cover and is slidingly and sealingly connected to the inner wall of the sealing cover, and the sealed space is formed between the sealing cover, the piston and the base; the piston can pressurize the flexible medium in the sealed space when moving toward the base.

[0011] In one feasible manner, the pressurizing component also includes a piston rod and a driving device, wherein the driving device is located outside the sealing cover, one end of the piston rod is connected to the driving device, and the other end of the piston rod passes through the sealing cover and is connected to the piston; the driving device is used to drive the piston to move closer to or away from the base in the sealing cover.

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

[0013] In one achievable manner, a hollow cavity communicating with the sealed space is provided in the piston rod, a pressure detection device is provided in the hollow cavity, and the pressure detection device is used to detect the pressure in the sealed space.

[0014] In one feasible manner, the crimping device also includes a support frame, the support frame includes a support plate, a guide plate and a plurality of first guide shafts, 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 of the first guide shafts 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 telescopically along the axial direction of the first guide shaft.

[0015] In one achievable manner, the crimping device further includes a workbench, and the base is disposed on the workbench; and the other end of each of the first guide shafts is fixedly connected to the workbench.

[0016] In one achievable manner, a plurality of linear bearings are disposed on the guide plate, and each of the linear bearings is respectively sleeved on each of the first guide shafts.

[0017] In one feasible manner, the driving device is connected to the guide plate via a floating joint.

[0018] In one feasible manner, the support frame also includes a plurality of second guide shafts, one end of each of the second guide shafts is fixedly connected to the sealing cover, and the other end of each of the second guide shafts is slidably connected to the guide plate; an elastic member is sleeved on each of the second guide shafts, and the opposite ends of the elastic member are respectively abutted against the guide plate and the sealing cover.

[0019] In one feasible manner, the base includes a pressing seat for placing the piece to be pressed, and an opening is provided on one end of the sealing cover close to the pressing seat; during pressing, the open end of the sealing cover abuts against the pressing seat, and the sealed space is formed between the sealing cover and the pressing seat.

[0020] In a feasible manner, the pressing seat is provided with a plurality of exhaust holes, and the exhaust holes penetrate the pressing seat; during pressing, the gas between the piece to be pressed and the pressing seat can be discharged through the exhaust holes.

[0021] In one achievable manner, the base further comprises a flexible seal, wherein the flexible seal is covered on the pressing seat, and the flexible seal covers the piece to be pressed and the exhaust hole.

[0022] In one achievable manner, the base further includes an annular limiting member, the annular limiting member is covered on an edge of the flexible sealing member, and the annular limiting member is fixedly connected to the pressing seat.

[0023] In one achievable manner, a second sealing ring is provided on the top surface of the pressing seat, the second sealing ring is arranged around the periphery of the part to be pressed, and the second sealing ring is located between the flexible sealing part and the pressing seat.

[0024] In one feasible manner, the pressing seat includes a base plate and a boss connected to the base plate, the boss protrudes toward the sealing cover, the boss is used to place the part to be pressed, and the exhaust hole is arranged 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 sealed space is formed between the sealing cover and the boss.

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

[0026] In one achievable manner, the crimping device further includes a heating component, and the heating component is used to heat the base.

[0027] In one achievable manner, the heating component includes a heat insulating member and a heating assembly, wherein the heat insulating member is disposed below the base, and the heating assembly is disposed between the heat insulating member and the base.

[0028] In one achievable manner, a groove is provided on the bottom wall of the base, and the heating component is arranged in the groove.

[0029] In one achievable manner, a column is provided on the thermal insulation member, the column protrudes from the thermal insulation member toward the base, and the column extends into the groove; a temperature detection device is provided in the column, and the temperature detection device is used to detect the heating temperature of the base.

[0030] The crimping device provided by the present invention is provided with a base, a sealing cover and a pressurizing component. During the pressing, the sealing cover and the base are used to cooperate to form a sealed space, and the pressurizing component is used to apply pressure to the flexible medium in the sealed space, thereby indirectly pressing the part to be pressed. Since the flexible medium can evenly apply pressure to each position of the part to be pressed, compared with the traditional pressing methods such as flat plate hot pressing or rolling pressing, this method of applying pressure to the part to be pressed using the flexible medium can ensure the uniformity of the pressure, thereby improving the pressing effect, and further improving the performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the crimping device in an embodiment of the present invention.

[0032] Figure 2 for Figure 1 Front view without the load-bearing frame and hydraulic pump.

[0033] Figure 3 for Figure 2 The front view of the crimping device when it is in the pressed state.

[0034] Figure 4 for Figure 3 Schematic diagram of the cross section along position AA.

[0035] Figure 5 for Figure 4 A local enlarged schematic diagram of position B in the middle.

[0036] Figure 6 for Figure 5 A local enlarged schematic diagram of the C position in the middle.

[0037] Figure 7 The figure is a schematic diagram of the assembly relationship among the piston, the piston rod and the sealing cover in the embodiment of the present invention.

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

[0039] Fig. 9 Schematic diagram of the assembly relationship between the base and the heating component in an embodiment of the present invention.

[0040] Fig.10 for Fig. 9 Schematic cross-section of .

[0041] Fig.11 for Fig. 9 Schematic diagram of the explosion structure.

[0042] Fig.12 It is a bottom view of the pressing seat in the embodiment of the present invention.

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

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

[0045] In the figure: 1-base, 11-pressing seat, 110-exhaust hole, 111-bottom plate, 112-boss, 1121-mounting surface, 1122-mounting groove, 12-flexible sealing member, 13-annular limiter, 14-second sealing ring, 15-third sealing ring, 16-groove, 17-notch, 2-sealing cover, 20-sealed space, 21-opening, 22-through hole, 3-pressurizing component, 31-piston, 311-first sealing ring, 312-vent, 32-piston rod, 321-hollow cavity, 33-driving device, 331-driving shaft, 34-pressure detection device, 4-flexible pressing Parts, 41-fluid sac, 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 part, 6-workbench, 61-load-bearing plate, 62-load-bearing frame, 63-hydraulic pump, 7-heating component, 71-thermal insulation, 711-support table, 712-column, 7120-center hole, 72-heating assembly, 721-heating coil, 722-wire, 73-temperature detection device, 8-parts to be pressed. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0048] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection claimed in the present invention.

[0049] like Figures 1 to 11 As shown, the crimping device provided by the embodiment of the present invention includes a base 1, a sealing cover 2 and a pressurizing component 3, and the base 1 is used to place a component 8 to be pressed. Depending on the application scenario, the component 8 to be pressed can be a lithium foil, a pole piece, a pole ear and other components. The sealing cover 2 is located on one side of the base 1, and the sealing cover 2 is used to cooperate with the base 1 to form a sealed space 20 between the base 1 and the base 1 during pressing.

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

[0051] The crimping device provided in the embodiment of the present invention is provided with a base 1, a sealing cover 2 and a pressurizing component 3. During the pressing, the sealing cover 2 and the base 1 cooperate to form a sealed space 20, and the pressurizing component 3 is used to apply pressure to the flexible medium in the sealed space 20, thereby indirectly pressing the part to be pressed 8. Since the flexible medium can apply pressure uniformly to each position of the part to be pressed 8 (even if the surface of the part to be pressed 8 is a non-flat structure, the flexible medium can also apply pressure uniformly to each position of the part to be pressed 8), compared with the traditional pressing methods such as flat hot pressing or rolling, this method of applying pressure to the part to be pressed 8 using a flexible medium can ensure the uniformity of the pressure, thereby improving the pressing effect, and further improving the performance of the battery.

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

[0053] like Fig.13As shown, as another embodiment, the flexible medium includes a flexible pressing member 4, which is disposed in the sealed space 20; the pressurizing member 3 is used to press the flexible pressing member 4, so as to apply pressure to the member to be pressed 8 through the flexible pressing member 4 (the flexible pressing member 4 can directly or indirectly apply pressure to the member to be pressed 8), so that the member to be pressed 8 is pressed under the pressurizing action of the flexible pressing member 4. Since the flexible pressing member 4 is made of a flexible material, the shape of the flexible pressing member 4 can be adaptively changed according to the shape of the surface of the member to be pressed 8 during pressing, so that the pressing force applied by the pressurizing member 3 to the flexible pressing member 4 is evenly transmitted to various parts of the member to be pressed 8. As an embodiment, when the pressurizing component 3 is in the process of squeezing the flexible press component 4, the pressurizing component 3 can also pressurize the gas in the sealed space 20 to form high-pressure gas, and the pressure of the high-pressure gas in the sealed space 20 can also act on the flexible press component 4, so as to evenly apply the pressure of the high-pressure gas to the part to be pressed 8 through the flexible press component 4 (that is, the above-mentioned flexible medium includes both gas and the flexible press component 4).

[0054] like Fig.13 As shown, as an embodiment, the flexible pressing member 4 includes a fluid capsule 41, which may be a liquid capsule or an air capsule, etc. Specifically, the fluid capsule 41 includes a flexible outer skin 411 and a fluid 412 disposed in the flexible outer skin 411, and the fluid 412 may be a liquid or a gas, etc. When the pressurizing component 3 squeezes the fluid capsule 41, the shape of the fluid capsule 41 can be adaptively changed according to the shape of the surface of the component 8 to be pressed, so that the squeezing force applied by the pressurizing component 3 to the fluid capsule 41 is evenly transmitted to various parts of the component 8 to be pressed.

[0055] like Fig.14 As shown, as another embodiment, the flexible pressing member 4 includes a flexible film 42, and the flexible film 42 can be made of materials such as silicone, thermoplastic elastomer, etc. When the pressurizing component 3 squeezes the flexible film 42, the shape of the flexible film 42 can be adaptively changed according to the shape of the surface of the component 8 to be pressed, so that the squeezing force applied by the pressurizing component 3 to the flexible film 42 is evenly transmitted to various parts of the component 8 to be pressed.

[0056] like Figures 4 to 8As shown, as an embodiment, the pressurizing component 3 includes a piston 31, the piston 31 is located in the sealing cover 2 and is slidably sealed with the inner wall of the sealing cover 2 (specifically, the outer peripheral surface of the piston 31 is slidably sealed with the inner wall of the sealing cover 2), and the piston 31 can move in the sealing cover 2 toward or away from the side where the base 1 is located. When pressed, the sealed space 20 is formed between the sealing cover 2, the piston 31 and the base 1, and the piston 31 can pressurize the flexible medium in the sealed space 20 when moving toward the side close to the base 1. Specifically, in this embodiment, the piston 31 can compress the gas in the sealed space 20 when moving toward the side close to the base 1, so that the gas in the sealed space 20 is compressed into high-pressure gas.

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

[0058] like Fig.13 As shown, as another embodiment, the flexible medium includes a flexible press member 4, which is arranged in the sealed space 20; the piston 31 can squeeze the flexible press member 4 when moving toward the side close to the base 1, so as to apply pressure to the part to be pressed 8 through the flexible press member 4 (that is, the piston 31 directly contacts the flexible press member 4 to apply a squeezing force to the flexible press member 4, and the flexible press member 4 then evenly transfers the squeezing force applied by the piston 31 to the part to be pressed 8).

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

[0060] like Figures 4 to 8 As shown, as an implementation mode, there are multiple first sealing rings 311 (two are shown in the figure), and the multiple first sealing rings 311 are arranged at intervals along the axial direction of the piston 31, so as to improve the sealing effect.

[0061] like Figures 1 to 8As shown, as an 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 is connected to the piston 31 after passing through the sealing cover 2; the driving device 33 is used to drive the piston 31 to move in the sealing cover 2 toward the side close to or away from the base 1. During pressing, the driving device 33 drives the piston 31 to extend toward the direction close to the base 1 to pressurize the gas in the sealed space 20; after the pressing is completed, the driving device 33 drives the piston 31 to retract in the direction away from the base 1, so as to prepare 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, and the driving device 33, the piston rod 32 and the sealing cover 2 are arranged in sequence from top to bottom. The top of the piston rod 32 is connected to the driving device 33, and a through hole 22 is provided on the top of the sealing cover 2. 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 in the sealing cover 2.

[0063] like Figures 4 to 8 As shown, as an embodiment, a hollow cavity 321 connected to the sealed space 20 is provided in the piston rod 32, and a pressure detection device 34 is provided in the hollow cavity 321. The pressure detection device 34 is used to detect the pressure in the sealed space 20 (in this embodiment, the pressure detection device 34 is used to detect the air pressure in the sealed space 20), so as to control the moving distance of the piston 31 according to the pressure value detected by the pressure detection device 34. Such a configuration can facilitate the installation of the pressure detection device 34.

[0064] like Figures 4 to 8 As shown, as an embodiment, a vent hole 312 is provided at a position corresponding to the hollow cavity 321 on the piston 31, and the hollow cavity 321 is connected to the sealed space 20 through the vent hole 312. A part of the pressure detection device 34 is located in the hollow cavity 321, and another part is located in the vent hole 312, and the pressure detection device 34 seals (blocks) the vent hole 312 to prevent gas leakage in the sealed space 20 (specifically, the pressure detection device 34 is fixed in the vent hole 312 through the thread provided on its outer peripheral side). Of course, in other embodiments, the pressure detection device 34 can also be completely located in the hollow cavity 321.

[0065] like Figures 1 to 8As shown, as an embodiment, the crimping device further includes a support frame 5, the support frame 5 includes a support plate 51, a guide plate 52 and a plurality of first guide shafts 53, and 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 telescopically move along the axial direction of the first guide shaft 53, thereby driving the piston rod 32 and the piston 31 to telescopically move along the axial direction of the first guide shaft 53.

[0066] The crimping device further comprises a workbench 6 , on which the base 1 is disposed, and the workbench 6 plays a load-bearing role. The other end of each first guide shaft 53 is fixedly connected to the workbench 6 .

[0067] Specifically, in this embodiment, the workbench 6 includes a load-bearing frame 62 and a load-bearing plate 61 arranged on the load-bearing frame 62, and the base 1 is arranged on the load-bearing plate 61. The support plate 51 and the sealing cover 2 are respectively located on the upper and lower sides of the guide plate 52, and each first guide shaft 53 is extended vertically. The top end of each first guide shaft 53 is fixedly connected to the support plate 51, and the bottom end of each first guide shaft 53 passes through the guide plate 52 and is fixedly connected to the load-bearing plate 61. The top end of the piston rod 32 is connected to the lower surface of the guide plate 52, and the driving shaft 331 of the driving device 33 is connected to the upper surface of the guide plate 52. The driving device 33 is used to drive the guide plate 52 to telescopically move up and down relative to the first guide shaft 53, thereby driving the piston rod 32 and the piston 31 to telescopically move up and down. Among them, the first guide shaft 53 can play a guiding role to ensure that the positions of the guide plate 52, the piston rod 32 and the piston 31 do not shift when they move up and down, thereby ensuring the smooth movement of the guide plate 52, the piston rod 32 and the piston 31; at the same time, the first guide shaft 53 can play a supporting role for the support frame 5 and the pressure-applying 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 driving 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, as an embodiment, the number of the first guide shafts 53 is multiple, and the multiple first guide shafts 53 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, the piston rod 32 and the piston 31, and the support stability of the support frame 5 and the pressure component 3 are further guaranteed.

[0070] like Figures 1 to 4 As shown, as an implementation mode, the support plate 51 and the guide plate 52 are both square structures, and the number of the first guide shafts 53 is four, and the four first guide shafts 53 are respectively arranged corresponding to the four vertex positions of the support plate 51 and the four vertex positions of the guide plate 52.

[0071] like Figures 1 to 4 As shown, as an embodiment, a plurality of linear bearings 54 are provided on the guide plate 52, and each linear bearing 54 is respectively sleeved on each first guide shaft 53 (that is, 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 the linear bearing 54, the smoothness and stability of the guide plate 52 during telescopic movement can be improved, and the movement wear caused by the 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, and the four linear bearings 54 are respectively sleeved on the four first guide shafts 53. The linear bearings 54 are fixed on the guide plate 52 by bolts.

[0073] like Figures 1 to 4 As shown, as an embodiment, the driving 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 deflection angle between the driving device 33 and the guide plate 52, reduce the relative accuracy requirements between the driving device 33 and the guide plate 52, and enable the driving device 33 and the guide plate 52 to operate smoothly within the allowable eccentricity range.

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

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

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

[0077] like Figures 1 to 4 As shown, as an embodiment, the driving device 33 is also connected to the sealing cover 2, and the driving device 33 is also used to drive the sealing cover 2 to move toward or away from the side where the base 1 is located (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 close to the base 1, so that the sealing cover 2 and the base 1 cooperate to form a sealed space 20 between the two; after the pressing is completed, the driving device 33 drives the sealing cover 2 to retract toward the direction away from the base 1, so as to facilitate the removal of the piece 8 to be pressed from the base 1 and prepare for the next pressing operation.

[0078] like Figures 1 to 4 As shown, as an embodiment, 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. An elastic member 57 is sleeved on each second guide shaft 56, and opposite ends of the elastic member 57 are respectively in contact with the guide plate 52 and the sealing cover 2. The elastic member 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 drives the sealing cover 2 to reset after the pressing is completed.

[0079] Specifically, in this embodiment, the second guide shaft 56 is vertically extended, the bottom end of the second guide shaft 56 is fixedly connected to the sealing cover 2 through its own thread, and the top end of the second guide shaft 56 passes through the guide plate 52 to achieve the 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 being separated from the guide plate 52. The elastic member 57 is a spring, which is sleeved on the second guide shaft 56, and the two ends of the spring abut against the guide plate 52 and the sealing cover 2 respectively.

[0080] When the driving 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 for a distance, and then the sealing cover 2 contacts the base 1. The driving device 33 continues to drive the guide plate 52 to move downward, and at this time, the elastic member 57 is compressed, and the elastic member 57 applies elastic force to the sealing cover 2, so that the sealing cover 2 contacts the base 1 closely to ensure the sealing of the sealing space 20, and 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. When the pressing work is completed, the driving device 33 drives the guide plate 52 to move upward, and the guide plate 52, the piston rod 32 and the piston 31 retract upward, and the sealing cover 2 is reset during the rebound of the elastic member 57 (that is, the piston 31 moves upward in the sealing cover 2, while the sealing cover 2 does not move under the elastic force of the elastic member 57); the driving device 33 continues to drive the guide plate 52 to move upward, and the sealing cover 2 retracts upward along with the guide plate 52, the piston rod 32 and the piston 31, thereby preparing for the next pressing work.

[0081] like Figures 1 to 4 As shown, as an embodiment, there are multiple second guide shafts 56 , and the multiple second guide shafts 56 are arranged at intervals along the circumference of the sealing cover 2 , so as to improve the movement stability of the sealing cover 2 .

[0082] Specifically, in this embodiment, the number of the second guide shafts 56 is four. The four second guide shafts 56 are evenly spaced along the circumference of the sealing cover 2 , and an elastic member 57 is sleeved on each second guide shaft 56 .

[0083] like Figures 4 to 12 As shown, as an embodiment, the base 1 includes a pressing seat 11 for placing the piece to be pressed 8, and an opening 21 is provided on the end of the sealing cover 2 facing the pressing seat 11 (specifically, the opening 21 is provided at the bottom end of the sealing cover 2). During pressing, the open end of the sealing cover 2 (i.e., the end of the sealing cover 2 provided with the opening 21) abuts against the pressing seat 11, and the sealing cover 2 covers the piece to be pressed 8 on the pressing seat 11, and a sealed space 20 is formed between the sealing cover 2 and the pressing seat 11 (specifically, the sealed 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, as an embodiment, the pressing seat 11 is provided with a plurality of exhaust holes 110, the exhaust holes 110 penetrate the pressing seat 11 (specifically, the exhaust holes 110 penetrate the pressing seat 11 up and down), and the exhaust holes 110 are connected to the outside. During pressing, the piece to be pressed 8 covers the exhaust holes 110, and the gas between the piece to be pressed 8 and the pressing seat 11 can be discharged through the exhaust holes 110.

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

[0086] like Figures 9 to 12 As shown, as an embodiment, there are multiple exhaust holes 110, and the multiple exhaust holes 110 are evenly spaced and arranged on the pressing seat 11. By providing multiple exhaust holes 110, the aperture of each exhaust hole 110 can be set to be smaller, so as to prevent the piece 8 to be pressed from sinking into the exhaust hole 110 during the pressing process and affecting the flatness of the piece 8 to be pressed (if the aperture of the exhaust hole 110 is too large, the piece 8 to be pressed may sink into the exhaust hole 110 under the action of pressure, resulting in defects such as pits on the piece 8 to be pressed).

[0087] As an implementation manner, the diameter of the exhaust hole 110 is 0.2 mm to 0.5 mm.

[0088] like Figures 4 to 6 and Figures 9 to 11 As shown, as an embodiment, the base 1 also includes a flexible seal 12, which is covered on the pressing seat 11. The flexible seal 12 covers the part to be pressed 8 and the exhaust hole 110, that is, the part to be pressed 8 is located between the flexible seal 12 and the pressing seat 11.

[0089] Specifically, by setting the flexible seal 12, the flexible seal 12 covers the piece to be pressed 8 and the exhaust hole 110. On the one hand, the flexible seal 12 can prevent the gas in the sealed space 20 from entering between the piece to be pressed 8 and the pressing seat 11, and at the same time, the flexible seal 12 can seal the exhaust hole 110 to prevent the gas in the sealed space 20 from being discharged through the exhaust hole 110, so that a high-pressure environment can be formed in the sealed space 20; on the other hand, since the flexible seal 12 is made of flexible material, during pressing, the high-pressure gas acts on the flexible seal 12, and the shape of the flexible seal 12 can be adaptively changed according to the shape of the surface of the piece to be pressed 8, so that the pressure applied by the high-pressure gas to the flexible seal 12 is evenly transmitted to various parts of the piece to be pressed 8, thereby improving the uniformity of pressing. The flexible seal 12 can be made of materials such as silicone and thermoplastic elastomer.

[0090] like Figures 4 to 6 and Figures 9 to 11As shown, as an embodiment, the base 1 also includes an annular limiter 13, which is an annular structure. The annular limiter 13 covers the edge position of the flexible seal 12 (the portion of the flexible seal 12 covering the part 8 to be pressed is not covered by the annular limiter 13), and the annular limiter 13 is fixedly connected to the pressing seat 11, that is, the edge position of the flexible seal 12 is clamped between the annular limiter 13 and the pressing seat 11.

[0091] Specifically, by setting the annular limiter 13, the annular limiter 13 can tightly cover and fix the edge position of the flexible seal 12 on the pressing seat 11, thereby preventing the gas in the sealed space 20 from entering between the to-be-pressed piece 8 and the pressing seat 11 through the gap between the edge of the flexible seal 12 and the pressing seat 11. The annular limiter 13 is fixedly connected to the pressing seat 11 by bolts. In the present embodiment, the flexible seal 12 is a disc-shaped structure, the shape of the annular limiter 13 is adapted to the shape of the flexible seal 12, and the annular limiter 13 is a circular ring structure. Of course, in other embodiments, the flexible seal 12 can also be a rectangular, polygonal or other structure, and the annular limiter 13 can also be a square ring, polygonal ring structure, etc. (the annular limiter 13 can even be formed by enclosing a plurality of strips).

[0092] like Figures 4 to 6 and Figures 9 to 11 As shown, as an embodiment, a second sealing ring 14 is provided on the top surface of the pressing seat 11, and the second sealing ring 14 is arranged around the periphery of the piece to be pressed 8, and the flexible sealing member 12 covers the second sealing ring 14, that is, the second sealing ring 14 is located between the flexible sealing member 12 and the pressing seat 11. By providing the second sealing ring 14, the second sealing ring 14 can further seal the flexible sealing member 12 and the pressing seat 11, thereby further preventing the gas in the sealed space 20 from entering between the piece 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.

[0093] like Figure 5 and Figure 6 As shown, as an embodiment, the second sealing ring 14 is arranged corresponding to the annular limiter 13, that is, the second sealing ring 14 is clamped between the pressing seat 11 and the annular limiter 13, and the annular limiter 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, as an embodiment, the pressing seat 11 includes a bottom plate 111 and a boss 112 connected to the bottom plate 111 (in this embodiment, the boss 112 and the bottom plate 111 are an integral structure), the boss 112 protrudes toward the sealing cover 2 (that is, the boss 112 protrudes upward compared to the bottom plate 111), the boss 112 is used to place the part 8 to be pressed, the exhaust hole 110 is set on the boss 112, and the exhaust hole 110 passes through the boss 112 (specifically, the exhaust hole 110 passes through the boss 112 up and down). During pressing, the sealing cover 2 covers the boss 112, and the open end of the sealing cover 2 abuts against the bottom plate 111, and the sealed space 20 is formed between the sealing cover 2 and the boss 112 (specifically, the sealed space 20 is formed between the sealing cover 2, the piston 31 and the boss 112).

[0095] like Fig.11 As shown, as an embodiment, the top surface of the boss 112 is provided with a mounting surface 1121, and the mounting surface 1121 is located in the middle position of the top surface of the boss 112, and the mounting surface 1121 is used to place the part 8 to be pressed, the exhaust hole 110 is arranged corresponding to the mounting surface 1121, and the flexible sealing part 12 covers the mounting surface 1121.

[0096] like Fig.11 As shown, as an embodiment, a mounting groove 1122 is provided on the top surface of the boss 112, and the mounting groove 1122 is arranged around the periphery of the mounting surface 1121, and the mounting groove 1122 is located between the mounting surface 1121 and the edge of the boss 112, and the second sealing ring 14 is arranged in the mounting groove 1122; the flexible seal 12 covers the mounting groove 1122, and the edge of the flexible seal 12 is located between the mounting groove 1122 and the edge of the boss 112.

[0097] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, as an implementation mode, the sealing cover 2 is a cylindrical structure, and the boss 112 is a truncated cone structure that imitates the sealing cover 2.

[0098] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, as an 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 clamped 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, as an implementation mode, there are multiple third sealing rings 15 (two are shown in the figure), and the multiple third sealing rings 15 are arranged at intervals 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, as an embodiment, the crimping device also includes a heating component 7, and 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 can be pressed at a preset temperature.

[0101] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, as an embodiment, the heating component 7 includes a thermal insulation member 71 and a heating assembly 72. The thermal insulation member 71 is arranged below the base 1, and the heating assembly 72 is arranged between the thermal insulation member 71 and the base 1. Specifically, in this embodiment, the thermal insulation member 71 is installed on the load-bearing plate 61, and the base 1 is arranged on the thermal insulation member 71.

[0102] like Figures 9 to 12 As shown, as an embodiment, a groove 16 is provided on the bottom wall of the base 1, and the heating component 72 is arranged in the groove 16. A support platform 711 is provided on the heat insulating member 71, and the support platform 711 protrudes from the heat insulating member 71 toward the base 1 (that is, the support platform 711 protrudes upward from the heat insulating member 71), and the support platform 711 extends into the groove 16; the heating component 72 is placed on the support platform 711, and the heating component 72 is in contact with the base 1, so as to better heat the base 1. At the same time, the size of the support platform 711 matches the size of the groove 16, so as to limit the base 1 and facilitate the positioning and assembly of the base 1 and the heat insulating member 71.

[0103] like Figures 9 to 12 As shown, as an embodiment, a column 712 is provided on the heat insulating member 71, the column 712 protrudes from the heat insulating member 71 toward the base 1 (that is, the column 712 protrudes upward from the heat insulating member 71), and the column 712 extends into the groove 16. The column 712 is located in the support platform 711, and the heating assembly 72 includes a heating coil 721, which is located in the groove 16, placed on the support platform 711, and the heating coil 721 is sleeved on the column 712, so that the heating coil 721 is limited and fixed.

[0104] like Figures 9 to 11As shown, as an embodiment, the heating component 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, as an embodiment, a temperature detection device 73 is provided in the column 712 , and the temperature detection device 73 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, a center hole 7120 is provided on the column 712 , and the temperature detection device 73 is disposed in the center hole 7120 . The temperature detection device 73 is fixed to the column 712 via a nut.

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

[0108] (1) In the normal state (i.e., in the non-pressing state), the driving shaft 331 of the driving device 33 is retracted upward, the guide plate 52 and the sealing cover 2 are located above the base 1, the sealing cover 2 pops up downward under the action of the elastic member 57, and the piston 31 is located at the topmost position in the sealing cover 2. The staff places the part 8 to be pressed on the pressing seat 11, and then places the flexible sealing member 12 on the pressing seat 11, and the flexible sealing member 12 completely covers the part 8 to be pressed. Then, the annular limiter 13 is pressed on the flexible sealing member 12, and the annular limiter 13 is fixed to the pressing seat 11 by bolts to ensure that the gas in the sealed space 20 will not leak during the pressing process. Then turn on the heating component 72, and use the heating component 72 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 operation, the entire pressing process is divided into two stages: the sealing cover 2 pressing stage and the air compression stage. The driving device 33 drives the guide plate 52 to move downward, and the sealing cover 2 moves downward for a certain distance and then contacts and completely compacts the base 1, and the pressing stage of the sealing cover 2 is completed. The driving device 33 continues to drive the guide plate 52 to move downward, and the piston rod 32 and the piston 31 move downward, and compress the air in the sealing space 20 to form high-pressure air (when a flexible pressing member 4 is provided in the sealing space 20, the piston 31 also squeezes the flexible pressing member 4), and the pressing member 8 is pressed under the pressurized action of the high-pressure gas (and / or the flexible pressing member 4). At the same time, in the air compression stage, as the guide plate 52 continues to move downward, the elastic member 57 is continuously compressed, so that the elastic member 57 can exert a greater elastic force on the sealing cover 2 to press the sealing cover 2, thereby avoiding air leakage between the sealing cover 2 and the base 1 due to excessive pressure in the sealing space 20.

[0110] When the pressure in the sealed space 20 reaches the specified pressure, the pressure in the sealed space 20 is kept constant for a period of time to improve the pressing effect. After the pressing is completed, the driving device 33 drives the guide plate 52, the piston rod 32 and the sealing cover 2 to retract upward, and the sealing cover 2 is reset during the rebound of the elastic member 57, so as to prepare for the next pressing work.

[0111] The crimping device provided in the embodiment of the present invention is provided with a base 1, a sealing cover 2 and a pressurizing component 3. During the pressing, the sealing cover 2 and the base 1 cooperate to form a sealed space 20, and the pressurizing component 3 is used to press the flexible medium in the sealed space 20, thereby indirectly pressing the part to be pressed 8. Since the flexible medium can uniformly press each position of the part to be pressed 8, compared with the traditional pressing methods such as flat plate hot pressing or rolling pressing, this method of using the flexible medium to press the part to be pressed 8 can ensure the uniformity of the pressurization, thereby improving the pressing effect, and further improving the performance of the battery.

[0112] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

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

2. The crimping device according to 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 component to be pressed (8) through the high-pressure gas; And / or, the flexible medium comprises a flexible pressing member (4) arranged in the sealed space (20), and the pressurizing component (3) is used to press the flexible pressing member (4) so ​​as to apply pressure to the member to be pressed (8) through the flexible pressing member (4).

3. The crimping device according to claim 2, characterized in that: The flexible pressing member (4) comprises a fluid bag (41) and / or a flexible film (42).

4. The crimping device according to claim 1, characterized in that: The pressurizing component (3) comprises a piston (31), the piston (31) being located in the sealing cover (2) and being slidably sealedly connected to the inner wall of the sealing cover (2), the sealing space (20) being formed between the sealing cover (2), the piston (31) and the base (1); the piston (31) is capable of pressurizing the flexible medium in the sealing space (20) when moving toward the base (1).

5. The crimping device according to claim 4, characterized in that: The pressurizing component (3) further comprises 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 away from the base (1) in the sealing cover (2).

6. The crimping device according to claim 5, characterized in that: The driving device (33) is connected to the sealing cover (2), and the driving 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 according to claim 5, characterized in that: The piston rod (32) is provided with a hollow cavity (321) in communication with the sealed space (20), and the hollow cavity (321) is provided with a pressure detection device (34), and the pressure detection device (34) is used to detect the pressure in the sealed space (20).

8. The crimping device according to claim 5, characterized in that: The crimping device also includes a support frame (5), the support frame (5) 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 of the first guide shafts (53) is fixedly connected to the support plate (51), and the guide plate (52) is slidably connected to each of the first guide shafts (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 telescopically along the axial direction of the first guide shaft (53).

9. The crimping device according to claim 8, characterized in that: The crimping device also includes a workbench (6), and the base (1) is arranged on the workbench (6); the other end of each first guide shaft (53) is fixedly connected to the workbench (6).

10. The crimping device according to claim 8, characterized in that: A plurality of linear bearings (54) are provided on the guide plate (52), and each of the linear bearings (54) is sleeved on each of the first guide shafts (53).

11. The crimping device according to claim 8, characterized in that: The driving device (33) is connected to the guide plate (52) via a floating joint (55).

12. The crimping device according to claim 8, characterized in that: The support frame (5) further comprises a plurality of second guide shafts (56), one end of each of the second guide shafts (56) being fixedly connected to the sealing cover (2), and the other end of each of the second guide shafts (56) being slidably connected to the guide plate (52); an elastic member (57) is sleeved on each of the second guide shafts (56), and opposite ends of the elastic member (57) are respectively in contact with the guide plate (52) and the sealing cover (2).

13. The crimping device according to claim 1, characterized in that: The base (1) comprises a pressing seat (11) for placing the piece to be pressed (8), and an opening (21) is provided on one end of the sealing cover (2) close to the pressing seat (11); during pressing, the opening end of the sealing cover (2) abuts against the pressing seat (11), and the sealed space (20) is formed between the sealing cover (2) and the pressing seat (11).

14. The crimping device according to claim 13, characterized in that: The pressing seat (11) is provided with a plurality of exhaust holes (110), and the exhaust holes (110) penetrate the pressing seat (11); during pressing, the gas between the piece to be pressed (8) and the pressing seat (11) can be discharged through the exhaust holes (110).

15. The crimping device according to claim 14, characterized in that: The base (1) further comprises a flexible sealing member (12), wherein the flexible sealing member (12) is covered on the pressing seat (11), and the flexible sealing member (12) covers the member to be pressed (8) and the exhaust hole (110).

16. The crimping device according to claim 15, characterized in that: The base (1) further comprises an annular limiting member (13), wherein the annular limiting member (13) is covered at an edge position of the flexible sealing member (12), and the annular limiting member (13) is fixedly connected to the pressing seat (11).

17. The crimping device according to claim 15, characterized in that: A second sealing ring (14) is provided on the top surface of the pressing seat (11), and the second sealing ring (14) is arranged around the periphery of the part to be pressed (8), and the second sealing ring (14) is located between the flexible sealing part (12) and the pressing seat (11).

18. The crimping device according to claim 14, characterized in that: The pressing seat (11) comprises a bottom plate (111) and a boss (112) connected to the bottom plate (111); the boss (112) protrudes toward the sealing cover (2); the boss (112) is used to place the part to be pressed (8); the exhaust hole (110) is arranged 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 bottom plate (111); the sealed space (20) is formed between the sealing cover (2) and the boss (112).

19. The crimping device according to 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 to 19, characterized in that: The crimping device further comprises a heating component (7), and the heating component (7) is used to heat the base (1).

21. The crimping device according to claim 20, characterized in that The heating component (7) comprises a heat insulating member (71) and a heating assembly (72); the heat insulating member (71) is arranged below the base (1); and the heating assembly (72) is arranged between the heat insulating member (71) and the base (1).

22. The crimping device according to claim 21, characterized in that A groove (16) is provided on the bottom wall of the base (1), and the heating component (72) is arranged in the groove (16).

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

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