Automatic material roll film replacing machine

Abstract

The utility model discloses an automatic material roll film replacing machine. Comprising a first upper pressing mechanism, a second upper pressing mechanism, a first upper diaphragm opening assembly and a second upper diaphragm opening assembly, wherein the first upper pressing mechanism is vertically arranged at the top of a rack; the second upper pressing mechanism is vertically arranged at the top of the rack and is parallel to the first upper pressing mechanism; the first upper diaphragm opening assembly is arranged at the bottom of the first upper pressing mechanism; the jacking and pressing mechanism is arranged on one side of the bottom of the rack and located below the first upper pressing mechanism and the second upper pressing mechanism; and the lower diaphragm opening mechanism is arranged on the jacking and pressing mechanism. According to the utility model, the upper diaphragm and the lower diaphragm of the upper pressure head and the top pressure head are automatically replaced respectively so as to prevent the upper pressure head or the top pressure head from being adhered to a copper foil and lithium foil laminated object to tear off a copper foil and a lithium foil, so that good quality and high yield of a negative plate manufactured by laminating the copper foil and the lithium foil are ensured; therefore, the problems of poor quality and low yield caused by adhesion between the upper pressure head and the lower pressure head for manufacturing the negative plate and the negative plate when the upper pressure head and the lower pressure head are separated at present are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a material roll changer field especially relates to a material roll film automatic changer. BACKGROUND

[0002] The pole piece structure of the battery mainly includes the positive pole piece and the negative pole piece, and they play a key role in the battery. The negative pole piece is made of lithium foil and copper foil by pressing, and it is mainly made by pressing the laminated lithium foil and copper foil by the upper pressing head and the lower pressing head. After the upper pressing head and the lower pressing head press the laminated copper foil and lithium foil, the negative pole piece is formed. Since the pole piece and the upper pressing head or the lower pressing head will be adhered, when the upper pressing head and the lower pressing head are separated, the negative pole piece will be adhered to the upper pressing head or the lower pressing head, or the negative pole piece will be adhered to the upper pressing head and the lower pressing head at the same time, which leads to the negative pole piece being easily pulled apart into copper foil and lithium foil by the upper pressing head and the lower pressing head when the upper pressing head and the lower pressing head are separated, which greatly reduces the yield, and causes the low yield of the negative pole piece. SUMMARY

[0003] The utility model aims at overcoming the prior art's insufficient, provide a material roll film automatic changer.

[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme: the material roll film automatic changer includes the frame, first upper pressing mechanism, vertical installation is in the top of frame, for the top of copper foil and lithium foil laminated object of pressing tightly;

[0005] Second upper pressing mechanism, vertical installation is in the top of frame and is arranged in parallel with first upper pressing mechanism, for the top of copper foil and lithium foil laminated object of pressing tightly;

[0006] First upper diaphragm prop open assembly, installation is in the bottom of first upper pressing mechanism, for the diaphragm (i.e. upper diaphragm) of prop open first upper pressing mechanism below;

[0007] Second upper diaphragm prop open assembly, installation is in the bottom of second upper pressing mechanism, for the diaphragm (i.e. upper diaphragm) of prop open second upper pressing mechanism below;

[0008] Upper unwinding assembly, installation is in the top of frame and is located in the side of first upper pressing mechanism away from second upper pressing mechanism, for the upper diaphragm material band unwinding to provide new diaphragm (i.e. new upper diaphragm) to first upper pressing mechanism and second upper pressing mechanism;

[0009] Upper winding assembly, installation is in the top of frame and is located in the side of second upper pressing mechanism away from first upper pressing mechanism, for the diaphragm waste band below first upper pressing mechanism and second upper pressing mechanism is wound;

[0010] The top pressing mechanism is arranged on one side of the bottom of the frame and below the first upper pressing mechanism and the second upper pressing mechanism, and is used for pressing the bottom of the copper foil and lithium foil laminates to cooperate with the first upper pressing mechanism and the second upper pressing mechanism to manufacture the negative electrode sheet.

[0011] The lower diaphragm opening mechanism is arranged on the top pressing mechanism and is used for opening the diaphragm above the top pressing mechanism (i.e. the lower diaphragm).

[0012] The lower unwinding assembly is arranged on one side of the top pressing mechanism and is used for unwinding the lower diaphragm material belt to provide new diaphragm (i.e. new lower diaphragm) for the top pressing mechanism.

[0013] The lower winding assembly is arranged on the other side of the top pressing mechanism and is used for winding the diaphragm waste belt above the top pressing mechanism to replace the new diaphragm (i.e. new lower diaphragm).

[0014] By adopting the above technical scheme, the upper pressing head and the top pressing head are automatically replaced with the upper diaphragm and the lower diaphragm respectively, so as to prevent the upper pressing head and the top pressing head from being adhered to the copper foil and the lithium foil laminates and tearing the copper foil and the lithium foil, which ensures the quality and the high yield of the negative electrode sheet manufactured by pressing the copper foil and the lithium foil laminates, and effectively solves the problem of poor quality and low yield caused by the lithium foil and the copper foil laminates being torn into copper foil and lithium foil when the upper pressing head and the lower pressing head are separated.

[0015] As preferred, the first upper pressing mechanism comprises an upper pressing head lifting driving device, an upper pressing seat, a guide rod seat, a first linear guide rod and an upper pressing head, the upper pressing head lifting driving device is vertically arranged on the top of the frame, the upper pressing seat is arranged on the output end of the upper pressing head lifting driving device, the guide rod seat is transversely arranged on the upper pressing seat, the first linear guide rod is vertically and slidably arranged on the top of the frame and the bottom of the first linear guide rod is connected and mounted with the upper pressing seat, the first linear guide rod is provided with at least two and is arranged on both sides of the upper pressing head lifting driving device respectively, and the upper pressing head is arranged on the bottom of the upper pressing seat and is used for pressing the copper foil and the lithium foil laminates to manufacture the negative electrode sheet.

[0016] Specifically, the structure and working principle of the second upper pressing mechanism are the same as those of the first upper pressing mechanism.

[0017] Specifically, the first upper diaphragm opening assembly comprises a first diaphragm supporting horizontal plate, a first linear guide rail, a second linear guide rail, a diaphragm supporting linkage rod, a first guide wheel mounting rod, a second guide wheel mounting rod, a first upper diaphragm supporting guide wheel, a second upper diaphragm supporting guide wheel, a first upper diaphragm supporting arm, a second upper diaphragm supporting arm, a first guide roller, a second guide roller, a third guide roller and a diaphragm supporting driving device; the first diaphragm supporting horizontal plate is horizontally arranged on one side of the upper pressing seat; the diaphragm supporting linkage rod is vertically slidably arranged on one side of the first diaphragm supporting horizontal plate through the first linear guide rail and the second linear guide rail arranged in parallel; the first guide wheel mounting rod and the second guide wheel mounting rod are vertically arranged on two ends of the diaphragm supporting linkage rod; the first upper diaphragm supporting guide wheel is arranged on the lower end of the first guide wheel mounting rod and the second upper diaphragm supporting guide wheel is arranged on the lower end of the second guide wheel mounting rod; the first guide wheel mounting rod and the first upper diaphragm supporting guide wheel are located on one side of the upper pressing head, and the second guide wheel mounting rod and the second upper diaphragm supporting guide wheel are located on the other side of the upper pressing head; the upper end of the first upper diaphragm supporting arm is rotatably connected with the first diaphragm supporting horizontal plate, and the upper end of the second upper diaphragm supporting arm is rotatably connected with the first diaphragm supporting horizontal plate; the first upper diaphragm supporting arm and the second upper diaphragm supporting arm are respectively located outside two ends of the diaphragm supporting linkage rod; the first guide roller and the second guide roller are arranged on one side of one end of the first diaphragm supporting horizontal plate, and the third guide roller is arranged on the same side of the other end of the first diaphragm supporting horizontal plate; the diaphragm supporting driving device is vertically arranged above one end of the diaphragm supporting linkage rod; the diaphragm supporting driving device is drivingly connected with the diaphragm supporting linkage rod; and the diaphragm supporting driving device is fixed on the upper pressing seat through a diaphragm supporting driving device mounting plate.

[0018] The first upper diaphragm supporting arm comprises a first upper diaphragm supporting swing rod, a first upper diaphragm supporting horizontal rod and a first upper diaphragm supporting roller; one end of the first upper diaphragm supporting swing rod is rotatably connected with the first diaphragm supporting horizontal plate through a first shaft pin; the first upper diaphragm supporting horizontal rod is horizontally arranged on the other end of the first upper diaphragm supporting swing rod; and the first upper diaphragm supporting roller is horizontally arranged on the first upper diaphragm supporting horizontal rod and is arranged perpendicularly to the first upper diaphragm supporting swing rod.

[0019] The second upper diaphragm supporting arm comprises a second upper diaphragm supporting swing rod, a second upper diaphragm supporting horizontal rod and a second upper diaphragm supporting roller; one end of the second upper diaphragm supporting swing rod is rotatably connected with the first diaphragm supporting horizontal plate through a second shaft pin; the second upper diaphragm supporting horizontal rod is horizontally arranged on the other end of the second upper diaphragm supporting swing rod; and the second upper diaphragm supporting roller is horizontally arranged on the second upper diaphragm supporting horizontal rod and is arranged perpendicularly to the second upper diaphragm supporting swing rod.

[0020] The first upper diaphragm supporting swing rod and the second upper diaphragm supporting swing rod are connected with a first elastic member; the first upper diaphragm supporting roller, the second upper diaphragm supporting roller, the first guide roller, the second guide roller and the third guide roller are located on the same side of the first diaphragm supporting horizontal plate.

[0021] As a preferred, the top pressing mechanism comprises a top pressing support, a top pressing base and two top pressing heads; the top pressing support is horizontally arranged on one side of the rack; the top pressing base is horizontally arranged on the top pressing support; and the two top pressing heads are respectively arranged on two ends of the top pressing base.

[0022] Specifically, the lower diaphragm opening mechanism comprises a second diaphragm supporting plate, a first lower diaphragm replacing assembly, a second lower diaphragm replacing assembly, a lower guide wheel push rod, a second linear guide rod and a push rod lifting driving device, the second diaphragm supporting plate is horizontally arranged on the top pressing base, the first lower diaphragm replacing assembly and the second lower diaphragm replacing assembly are arranged on two end portions of the second diaphragm supporting plate, the lower guide wheel push rod is horizontally arranged below the first lower diaphragm replacing assembly and the second lower diaphragm replacing assembly, the lower guide wheel push rod is movably arranged on the top pressing support through the second linear guide rod, and the push rod lifting driving device is vertically arranged on the top pressing support and is in transmission connection with the lower guide wheel push rod.

[0023] The first lower diaphragm replacing assembly comprises a fourth guide roller, a fifth guide roller, a first lower diaphragm supporting arm and a second lower diaphragm supporting arm, the fourth guide roller and the fifth guide roller are horizontally arranged on one end portion of the second diaphragm supporting plate and are vertically arranged with the second diaphragm supporting plate respectively, the fourth guide roller and the fifth guide roller are respectively arranged on the two sides of one of the top pressing heads, and the first lower diaphragm supporting arm and the second lower diaphragm supporting arm are oppositely arranged on the same end portion of the second diaphragm supporting plate.

[0024] The first lower diaphragm supporting arm comprises a lower diaphragm supporting lever, a lower diaphragm supporting guide wheel, a lower diaphragm supporting cross rod and a lower diaphragm supporting roller, the lower diaphragm supporting lever is rotationally connected with the second diaphragm supporting plate through a third shaft pin, the lower diaphragm supporting lever is arranged in an L shape, the lower diaphragm supporting guide wheel is arranged on the lower end of the lower diaphragm supporting lever, the lower diaphragm supporting cross rod is horizontally arranged on the upper end of the lower diaphragm supporting lever, and the lower diaphragm supporting roller is horizontally arranged on the lower diaphragm supporting cross rod and is vertically arranged with the lower diaphragm supporting lever.

[0025] The second lower diaphragm supporting arm is arranged in a mirror image symmetry with the first lower diaphragm supporting arm, and a second elastic member is arranged between the upper end portion of the lower diaphragm supporting lever of the first lower diaphragm supporting arm and the upper end portion of the lower diaphragm supporting lever of the second lower diaphragm supporting arm.

[0026] Specifically, the structure and working principle of the second lower diaphragm replacing assembly are the same as those of the first lower diaphragm replacing assembly, and the second lower diaphragm replacing assembly supports the lower diaphragm on the other top pressing head.

[0027] As preferred, a controller or a control system is arranged for signal control of the first upper pressing mechanism, the second upper pressing mechanism, the first upper diaphragm opening assembly, the second upper diaphragm opening assembly, the upper unwinding assembly, the upper winding assembly, the lower diaphragm opening assembly, the lower unwinding assembly and the lower winding assembly, the controller is a PLC programmable logic controller, and the PLC programmable logic controller can be a programmable logic controller with a model of XDS-40T-D, but is not limited thereto.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] 1. The first upper pressing mechanism is provided with a first upper diaphragm opening component at the bottom, the second upper pressing mechanism is provided with a second upper diaphragm opening component at the bottom, and the top pressing mechanism is provided below the first upper pressing mechanism and the second upper pressing mechanism, and the lower diaphragm opening mechanism is provided on the top pressing mechanism, so that the upper pressing head and the top pressing head can be automatically replaced with the upper diaphragm and the lower diaphragm respectively, so as to prevent the upper pressing head or the top pressing head from being adhered to the copper foil and the lithium foil laminated object and tearing the copper foil and the lithium foil, thereby ensuring the quality and yield of the negative electrode sheet made by pressing the copper foil and the lithium foil laminated object, and effectively solving the problem of poor quality and low yield caused by tearing the lithium foil and the copper foil laminated object into copper foil and lithium foil when the upper pressing head and the lower pressing head are separated.

[0030] 2. The structure of each upper pressing mechanism is designed, so that the first straight guide rod can guide the lifting movement of the guide rod seat, the upper pressing seat and the upper pressing head, so as to ensure the stability of the upper pressing head pressing the copper foil and the lithium foil laminated object. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to facilitate the description, the utility model is described in detail by the following preferred embodiments and drawings.

[0032] Figure 1 It is a perspective view of a material roll film automatic replacement machine of the utility model.

[0033] Figure 2 It is a perspective view of a first upper pressing mechanism or a second upper pressing mechanism of a material roll film automatic replacement machine of the utility model.

[0034] Figure 3 It is a perspective view of a first upper diaphragm opening component or a second upper diaphragm opening component of a material roll film automatic replacement machine of the utility model.

[0035] Figure 4 It is an assembled perspective view of a top pressing mechanism, a lower diaphragm opening mechanism, a lower unwinding component and a lower winding component of a material roll film automatic replacement machine of the utility model.

[0036] Figure 5 It is a perspective view of a lower diaphragm opening mechanism of a material roll film automatic replacement machine of the utility model. DETAILED DESCRIPTION

[0037] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0039] Referring to Figure 1 As shown in the drawings, the present application is a roll film automatic replacement machine, which comprises a rack 1, a first upper pressing mechanism 21 vertically installed on the top of the rack 1 for pressing the top of the copper foil and lithium foil laminates; a second upper pressing mechanism 22 vertically installed on the top of the rack 1 and arranged in parallel with the first upper pressing mechanism 21 for pressing the top of the copper foil and lithium foil laminates; a first upper diaphragm opening assembly 31 installed at the bottom of the first upper pressing mechanism 21 for opening the diaphragm below the first upper pressing mechanism 21; a second upper diaphragm opening assembly 32 installed at the bottom of the second upper pressing mechanism 22 for opening the diaphragm below the second upper pressing mechanism 22; an upper unwinding assembly 4 installed on the top of the rack 1 and located on the side of the first upper pressing mechanism 21 away from the second upper pressing mechanism 22 for unwinding the upper diaphragm material belt to provide new diaphragm for the first upper pressing mechanism 21 and the second upper pressing mechanism 22; an upper winding assembly 5 installed on the top of the rack 1 and located on the side of the second upper pressing mechanism 22 away from the first upper pressing mechanism 21 for winding the diaphragm waste belt below the first upper pressing mechanism 21 and the second upper pressing mechanism 22; a top pressing mechanism 6 installed on one side of the bottom of the rack 1 and located below the first upper pressing mechanism 21 and the second upper pressing mechanism 22 for pressing the bottom of the copper foil and lithium foil laminates to cooperate with the first upper pressing mechanism 21 and the second upper pressing mechanism 22 to make the negative electrode sheet; a lower diaphragm opening mechanism 7 installed on the top pressing mechanism 6 for opening the diaphragm above the top pressing mechanism 6; a lower unwinding assembly 8 installed on one side of the top pressing mechanism 6 for unwinding the lower diaphragm material belt to provide new diaphragm for the top pressing mechanism 6; and a lower winding assembly 9 installed on the other side of the top pressing mechanism 6 for winding the diaphragm waste belt above the top pressing mechanism 6 to replace the new diaphragm.

[0040] In the present embodiment, the upper unwinding assembly 4, the upper winding assembly 5, the lower unwinding assembly 8 and the lower winding assembly 9 each comprise a servo motor and a roll, and the output shaft of the servo motor is connected and installed with the roll.

[0041] Referring to Figure 2As shown, the first upper pressing mechanism 21 comprises an upper pressing head lifting driving device 210, an upper pressing seat 211, a guide rod seat 212, a first linear guide rod 213 and an upper pressing head 214. The upper pressing head lifting driving device 210 is vertically arranged on the top of the frame 1. The upper pressing seat 211 is arranged on the output end of the upper pressing head lifting driving device 210. The guide rod seat 212 is transversely arranged on the upper pressing seat 211. The first linear guide rod 213 is vertically and slidably arranged on the top of the frame 1, and the bottom of the first linear guide rod 213 is connected and mounted with the upper pressing seat 211. The first linear guide rod 213 is provided with at least two rods and is arranged on both sides of the upper pressing head lifting driving device 210. The upper pressing head 214 is arranged on the bottom of the upper pressing seat 211 and is used for pressing the copper foil and the lithium foil laminates to make the negative electrode sheet.

[0042] In the present embodiment, the structure and working principle of the second upper pressing mechanism 22 are the same as those of the first upper pressing mechanism 21. The upper pressing head lifting driving device 210 drives the upper pressing head 214 to descend to press the copper foil and the lithium foil laminates. The first linear guide rod 213 guides the lifting movement of the guide rod seat 212, the upper pressing seat 211 and the upper pressing head 214, which ensures the stability of the upper pressing head 214 in pressing the copper foil and the lithium foil laminates. The upper pressing head lifting driving device 210 is arranged as an electric cylinder.

[0043] Referring to Figure 3As shown, the first upper diaphragm opening assembly 31 comprises a first diaphragm supporting horizontal plate 33, a first linear guide rail 34, a second linear guide rail 35, a first guide wheel mounting rod 36, a second guide wheel mounting rod 37, a first upper supporting arm 38, a second upper supporting arm 39, a diaphragm linkage rod 310, a first upper diaphragm guide wheel 311, a second upper diaphragm guide wheel 312, a first guide roller 313, a second guide roller 314, a third guide roller 315 and a diaphragm driving device 316; the first diaphragm supporting horizontal plate 33 is horizontally arranged on one side of the upper pressing seat 211, the diaphragm linkage rod 310 is vertically slidably arranged on one side of the first diaphragm supporting horizontal plate 33 through the parallel first linear guide rail 34 and the second linear guide rail 35, the first guide wheel mounting rod 36 and the second guide wheel mounting rod 37 are vertically arranged on both ends of the diaphragm linkage rod 310, the first upper diaphragm guide wheel 311 and the second upper diaphragm guide wheel 312 are arranged on the lower ends of the first guide wheel mounting rod 36 and the second guide wheel mounting rod 37 respectively, the first guide wheel mounting rod 36 and the first upper diaphragm guide wheel 311 are located on one side of the upper pressing head 214, and the second guide wheel mounting rod 37 and the second upper diaphragm guide wheel 312 are located on the other side of the upper pressing head 214; the upper end of the first upper supporting arm 38 is rotationally connected with the first diaphragm supporting horizontal plate 33, the upper end of the second upper supporting arm 39 is rotationally connected with the first diaphragm supporting horizontal plate 33, and the first upper supporting arm 38 and the second upper supporting arm 39 are respectively located on the outer sides of both ends of the diaphragm linkage rod 310; the first guide roller 313 and the second guide roller 314 are arranged on one side of one end of the first diaphragm supporting horizontal plate 33, the third guide roller 315 is arranged on the same side of the other end of the first diaphragm supporting horizontal plate 33, the diaphragm driving device 316 is vertically arranged above one end of the diaphragm linkage rod 310, the diaphragm driving device 316 is drivingly connected with the diaphragm linkage rod 310, and the diaphragm driving device 316 is fixed on the upper pressing seat 211 through a diaphragm driving device mounting plate 317. In this embodiment, the diaphragm driving device 316 is a pneumatic cylinder.

[0044] Referring to Figure 3 As shown, the first upper supporting arm 38 comprises a first upper diaphragm swing rod 381, a first upper diaphragm horizontal rod 382 and a first upper diaphragm roller 383, one end of the first upper diaphragm swing rod 381 is rotationally connected with the first diaphragm supporting horizontal plate 33 through a first shaft pin 384, the first upper diaphragm horizontal rod 382 is horizontally arranged on the other end of the first upper diaphragm swing rod 381, and the first upper diaphragm roller 383 is horizontally arranged on the first upper diaphragm horizontal rod 382 and is vertically arranged with the first upper diaphragm swing rod 381.

[0045] Referring to Figure 3As shown, the second upper supporting arm 39 comprises a second upper supporting film swing rod 391, a second upper supporting film horizontal rod 392 and a second upper supporting film roller 393. One end of the second upper supporting film swing rod 391 is rotatably connected to the first supporting film horizontal plate 33 through a second shaft pin 394. The second upper supporting film horizontal rod 392 is horizontally arranged on the other end of the second upper supporting film swing rod 391. The second upper supporting film roller 393 is horizontally arranged on the second upper supporting film horizontal rod 392 and is arranged perpendicularly to the second upper supporting film swing rod 391.

[0046] Referring to Figure 3 As shown, a first elastic member 395 is connected between the first upper supporting film swing rod 381 and the second upper supporting film swing rod 391. The first upper supporting film roller 383, the second upper supporting film roller 393, the first guide roller 313, the second guide roller 314 and the third guide roller 315 are located on the same side of the first supporting film horizontal plate 33. The upper diaphragm is sequentially wound around the first guide roller 313 and the second guide roller 314, is sequentially wound around the first upper supporting film roller 383 and the second upper supporting film roller 393 from below, and is sequentially wound around the third guide roller 315 from above. When the first elastic member 395 pulls the first upper supporting film swing rod 381 and the second upper supporting film swing rod 391 to swing relatively close to each other, the first upper supporting film roller 383 and the second upper supporting film roller 393 move relatively close to each other in a circular trajectory, so that the upper diaphragm is attached to the bottom of the upper pressing head 214. The upper pressing head lifting driving device 210 in the first upper pressing mechanism 21 drives the upper pressing head 214 to press down on the top of the copper foil and lithium foil laminated object to make a negative electrode sheet. The upper diaphragm isolates the upper pressing head 214 from the copper foil and lithium foil laminated object to avoid the upper pressing head 214 from adhering to the copper foil and lithium foil laminated object. When it is necessary to replace the upper diaphragm of the upper pressing head 214, the supporting film driving device 316 drives the supporting film linkage rod 310, the first guide roller mounting rod 36 and the second guide roller mounting rod 37 to jointly descend to drive the first upper supporting film guide roller 311 and the second upper supporting film guide roller 312 to descend. The first upper supporting film guide roller 311 and the second upper supporting film guide roller 312 respectively push the first upper supporting film swing rod 381 and the second upper supporting film swing rod 391 to swing away from each other. The first upper supporting film swing rod 381 and the second upper supporting film swing rod 391 respectively drive the first upper supporting film roller 383 and the second upper supporting film roller 393 to move away from each other in a circular trajectory. The first upper supporting film roller 383 and the second upper supporting film roller 393 respectively push the upper diaphragm to separate the upper diaphragm from the bottom surface of the upper pressing head 214, thereby preparing for the next step of replacing the new upper diaphragm of the upper pressing head 214. In this embodiment, the first elastic member 395 is a tension spring.

[0047] Referring to Figure 4 As shown, the top pressing mechanism 6 comprises a top pressing support 61, a top pressing base 62 and two top pressing heads 63. The top pressing support 61 is horizontally arranged on one side of the rack 1. The top pressing base 62 is horizontally arranged on the top pressing support 61. The two top pressing heads 63 are respectively arranged on the two end portions of the top pressing base 62.

[0048] In the present embodiment, two top pressing heads 63 are used to carry the bottom of the lithium foil and copper foil laminates to match the upper pressing heads 214 of the first upper pressing mechanism 21 and the second upper pressing mechanism 22 to press the lithium foil and copper foil laminates to make negative electrode sheets.

[0049] Referring to Figure 4 and Figure 5 As shown in the figure, the lower diaphragm opening mechanism 7 comprises a second diaphragm supporting plate 70, a first lower diaphragm replacement assembly 71, a second lower diaphragm replacement assembly 72, a lower guide wheel push rod 73, a second linear guide rod 74 and a push rod lifting driving device 75. The second diaphragm supporting plate 70 is transversely arranged on the top pressing base 62. The first lower diaphragm replacement assembly 71 and the second lower diaphragm replacement assembly 72 are arranged on the two ends of the second diaphragm supporting plate 70. The lower guide wheel push rod 73 is transversely arranged below the first lower diaphragm replacement assembly 71 and the second lower diaphragm replacement assembly 72. The lower guide wheel push rod 73 is liftably arranged on the top pressing support 61 through the second linear guide rod 74. The push rod lifting driving device 75 is vertically arranged on the top pressing support 61 and is in transmission connection with the lower guide wheel push rod 73. The push rod lifting driving device 75 drives the lower guide wheel push rod 73 to rise to push the first lower diaphragm replacement assembly 71 and the second lower diaphragm replacement assembly 72 to rise synchronously. The first lower diaphragm replacement assembly 71 props up the lower diaphragm on one of the top pressing heads 63. The second lower diaphragm replacement assembly 72 props up the lower diaphragm on the other top pressing head 63.

[0050] Referring to Figure 5 As shown in the figure, the first lower diaphragm replacement assembly 71 comprises a first lower diaphragm supporting arm 76, a second lower diaphragm supporting arm 77, a fourth guide roller 78 and a fifth guide roller 79. The fourth guide roller 78 and the fifth guide roller 79 are transversely arranged on one end of the second diaphragm supporting plate 70 and are vertically arranged with the second diaphragm supporting plate 70 respectively. The fourth guide roller 78 and the fifth guide roller 79 are located on the two sides of one of the top pressing heads 63 respectively. The first lower diaphragm supporting arm 76 and the second lower diaphragm supporting arm 77 are oppositely arranged on the same end of the second diaphragm supporting plate 70.

[0051] Referring to Figure 5 As shown in the figure, the first lower diaphragm supporting arm 76 comprises a lower diaphragm supporting lever 761, a lower diaphragm supporting guide wheel 762, a lower diaphragm supporting crossbar 763 and a lower diaphragm supporting roller 764. The lower diaphragm supporting lever 761 is rotatably connected with the second diaphragm supporting plate 70 through a third shaft pin 765. The lower diaphragm supporting lever 761 is arranged in an L shape. The lower diaphragm supporting guide wheel 762 is arranged on the lower end of the lower diaphragm supporting lever 761. The lower diaphragm supporting crossbar 763 is transversely arranged on the upper end of the lower diaphragm supporting lever 761. The lower diaphragm supporting roller 764 is transversely arranged on the lower diaphragm supporting crossbar 763 and is vertically arranged with the lower diaphragm supporting lever 761.

[0052] In the embodiment, when the push rod lifting driving device 75 drives the lower guide wheel push rod 73 to lift up, the lower guide wheel push rod 73 lifts up the lower supporting film guide wheel 762, the lower supporting film lever 761 of the first lower supporting film arm 76 and the second lower supporting film arm 77 is levered by the lifting force of the lower supporting film guide wheel 762 to move in a circular track, and the lower supporting film roller 764 is driven by the lower supporting film lever 761 to move upwards in a circular track.

[0053] Referring to Figure 5 , the second lower supporting film arm 77 is arranged in mirror symmetry with the first lower supporting film arm 76, and the upper end of the lower supporting film lever 761 of the first lower supporting film arm 76 and the upper end of the lower supporting film lever 761 of the second lower supporting film arm 77 are connected by a second elastic member 771, which pulls the lower supporting film lever 761 of the first lower supporting film arm 76 and the lower supporting film lever 761 of the second lower supporting film arm 77 to move towards each other in a circular track.

[0054] In the embodiment, referring to Figure 4 to Figure 5 , the lower diaphragm is unwound from the lower unwinding assembly 8, and then sequentially passes through the fourth guide roller 78, the two lower supporting film rollers 764, and the fifth guide roller 79 to be attached to the top pressure head 63. When the push rod lifting driving device 75 drives the lower guide wheel push rod 73 to lift up, the lower guide wheel push rod 73 lifts up the lower supporting film guide wheel 762 of the first lower supporting film arm 76 and the second lower supporting film arm 77, and the lower supporting film rollers 764 of the first lower supporting film arm 76 and the second lower supporting film arm 77 move away from each other in a circular track to support the lower diaphragm on the top pressure head 63 for the next step of replacing the lower diaphragm. When the push rod lifting driving device 75 drives the lower guide wheel push rod 73 to lower down, the second elastic member 771 pulls the upper end of the lower supporting film lever 761 of the first lower supporting film arm 76 and the second lower supporting film arm 77 to swing towards each other, and the lower supporting film rollers 764 of the first lower supporting film arm 76 and the second lower supporting film arm 77 move towards each other in a circular track to attach the lower diaphragm to the top pressure head 63 to isolate the top pressure head 63 from the lithium foil and copper foil stack. The second elastic member 771 is a tension spring, and the push rod lifting driving device 75 is a pneumatic cylinder.

[0055] Referring to Figure 5 , the structure and working principle of the second lower diaphragm replacement assembly 72 are the same as those of the first lower diaphragm replacement assembly 71, and the second lower diaphragm replacement assembly 72 supports the lower diaphragm on the other top pressure head 63.

[0056] In the embodiment, the first upper diaphragm opening assembly 31 and the second upper diaphragm opening assembly 32 push the upper diaphragm of the upper pressing head 214 of the first upper pressing mechanism 21 and the second upper pressing mechanism 22 respectively, so that the upper diaphragm is separated from the two upper pressing heads 214 respectively, the upper diaphragm roll unwinding assembly 4 unwinds the upper diaphragm roll to supply the upper diaphragm to the upper pressing head 214 of the first upper pressing mechanism 21 and the second upper pressing mechanism 22, and the waste diaphragm tape winding assembly 5 winds the waste diaphragm tape to replace the upper diaphragm of the upper pressing head 214 of the first upper pressing mechanism 21 and the second upper pressing mechanism 22; the lower diaphragm opening mechanism 7 opens the lower diaphragm of the two top pressing heads 63 of the top pressing mechanism 6, the lower diaphragm roll unwinding assembly 8 unwinds the lower diaphragm roll to supply the lower diaphragm to the two top pressing heads 63 of the top pressing mechanism 6, and the waste diaphragm tape winding assembly 9 winds the waste diaphragm tape to replace the lower diaphragm of the two top pressing heads 63 of the top pressing mechanism 6, and the overall structure design realizes automatic replacement of the upper pressing head 214 and the top pressing head 63 with the upper diaphragm and the lower diaphragm respectively, so as to prevent the upper pressing head 214 and the top pressing head 63 from being stuck with the copper foil and the lithium foil laminates and tearing the copper foil and the lithium foil, which ensures the quality and the high yield of the negative electrode sheet made by pressing the copper foil and the lithium foil laminates, and effectively solves the problem that the current negative electrode sheet manufacturing equipment often tears the copper foil and the lithium foil laminates into the copper foil and the lithium foil when the upper pressing head and the lower pressing head are separated because the negative electrode sheet is stuck with the upper pressing head and the lower pressing head or the negative electrode sheet is stuck with one of the upper pressing head and the lower pressing head, which leads to poor quality and low yield.

[0057] The above embodiment is only an example of the present application and is not intended to limit the implementation and scope of the present application. Any technical solution that is the same as or equivalent to the content described in the claims of the present application should be included in the protection scope of the present application.

Claims

1. A roll film automatic changer characterized by: The first upper pressing mechanism is vertically arranged on the top of the frame and is used to press the top of the copper foil and lithium foil laminates; The second upper pressing mechanism is vertically arranged on the top of the frame and is used to press the top of the copper foil and lithium foil laminates; The first upper diaphragm opening assembly is arranged on the bottom of the first upper pressing mechanism and is used to open the diaphragm below the first upper pressing mechanism; The second upper diaphragm opening assembly is arranged on the bottom of the second upper pressing mechanism and is used to open the diaphragm below the second upper pressing mechanism; The upper unwinding assembly is arranged on the top of the frame and is located on the side of the first upper pressing mechanism away from the second upper pressing mechanism, and is used to unwind the upper diaphragm material belt to provide new diaphragm for the first upper pressing mechanism and the second upper pressing mechanism; The upper winding assembly is arranged on the top of the frame and is located on the side of the second upper pressing mechanism away from the first upper pressing mechanism, and is used to wind the waste diaphragm belt below the first upper pressing mechanism and the second upper pressing mechanism; The top pressing mechanism is arranged on one side of the bottom of the frame and is located below the first upper pressing mechanism and the second upper pressing mechanism, and is used to press the bottom of the copper foil and lithium foil laminates to cooperate with the first upper pressing mechanism and the second upper pressing mechanism to make the negative electrode sheet; The lower diaphragm opening mechanism is arranged on the top pressing mechanism and is used to open the diaphragm above the top pressing mechanism; The lower unwinding assembly is arranged on one side of the top pressing mechanism and is used to unwind the lower diaphragm material belt to provide new diaphragm for the top pressing mechanism; The lower winding assembly is arranged on the other side of the top pressing mechanism and is used to wind the waste diaphragm belt above the top pressing mechanism to replace the new diaphragm.

2. The automatic roll film changing machine according to claim 1, characterized in that: The first upper pressing mechanism includes an upper pressing head lifting driving device, an upper pressing seat, a guide rod seat, a first linear guide rod, and an upper pressing head. The upper pressing head lifting driving device is vertically arranged on the top of the frame. The upper pressing seat is arranged on the output end of the upper pressing head lifting driving device. The guide rod seat is transversely arranged on the upper pressing seat. The first linear guide rod is vertically and slidably arranged on the top of the frame, and the bottom of the first linear guide rod is connected and mounted with the upper pressing seat. The first linear guide rod is provided with at least two and is arranged on both sides of the upper pressing head lifting driving device. The upper pressing head is arranged on the bottom of the upper pressing seat and is used to press the copper foil and lithium foil laminates to make the negative electrode sheet.

3. The automatic roll film changing machine according to claim 2, wherein: The structure and working principle of the second upper pressing mechanism are the same as those of the first upper pressing mechanism.

4. The automatic roll film changing machine according to claim 2, wherein: The first upper diaphragm opening assembly comprises a first diaphragm supporting horizontal plate, a first linear guide rail, a second linear guide rail, a diaphragm supporting linkage rod, a first guide wheel mounting rod, a second guide wheel mounting rod, a first upper diaphragm guide wheel, a second upper diaphragm guide wheel, a first upper supporting arm, a second upper supporting arm, a first guide roller, a second guide roller, a third guide roller and a diaphragm supporting driving device; the first diaphragm supporting horizontal plate is horizontally arranged on one side of the upper pressing seat; the diaphragm supporting linkage rod is vertically slidably arranged on one side of the first diaphragm supporting horizontal plate through the first linear guide rail and the second linear guide rail arranged in parallel; the first guide wheel mounting rod and the second guide wheel mounting rod are vertically arranged on two ends of the diaphragm supporting linkage rod; the first upper diaphragm guide wheel and the second upper diaphragm guide wheel are arranged on lower ends of the first guide wheel mounting rod and the second guide wheel mounting rod respectively; the first guide wheel mounting rod and the first upper diaphragm guide wheel are arranged on one side of the upper pressing head, and the second guide wheel mounting rod and the second upper diaphragm guide wheel are arranged on the other side of the upper pressing head; The upper end of the first upper supporting arm is rotationally connected with the first diaphragm supporting horizontal plate, and the upper end of the second upper supporting arm is rotationally connected with the first diaphragm supporting horizontal plate; the first upper supporting arm and the second upper supporting arm are arranged outside two ends of the diaphragm supporting linkage rod respectively; the first guide roller and the second guide roller are arranged on one side of one end of the first diaphragm supporting horizontal plate, and the third guide roller is arranged on the same side of the other end of the first diaphragm supporting horizontal plate; the diaphragm supporting driving device is vertically arranged above one end of the diaphragm supporting linkage rod, and the diaphragm supporting driving device is drivingly connected with the diaphragm supporting linkage rod; the diaphragm supporting driving device is fixed on the upper pressing seat through a diaphragm supporting driving device mounting plate. The first upper supporting arm comprises a first upper diaphragm swing rod, a first upper diaphragm horizontal rod and a first upper diaphragm roller; one end of the first upper diaphragm swing rod is rotationally connected with the first diaphragm supporting horizontal plate through a first shaft pin; the first upper diaphragm horizontal rod is horizontally arranged on the other end of the first upper diaphragm swing rod; and the first upper diaphragm roller is horizontally arranged on the first upper diaphragm horizontal rod and arranged perpendicularly to the first upper diaphragm swing rod. The second upper supporting arm comprises a second upper diaphragm swing rod, a second upper diaphragm horizontal rod and a second upper diaphragm roller; one end of the second upper diaphragm swing rod is rotationally connected with the first diaphragm supporting horizontal plate through a second shaft pin; the second upper diaphragm horizontal rod is horizontally arranged on the other end of the second upper diaphragm swing rod; and the second upper diaphragm roller is horizontally arranged on the second upper diaphragm horizontal rod and arranged perpendicularly to the second upper diaphragm swing rod. A first elastic member is arranged between the first upper diaphragm swing rod and the second upper diaphragm swing rod; the first upper diaphragm roller, the second upper diaphragm roller, the first guide roller, the second guide roller and the third guide roller are arranged on the same side of the first diaphragm supporting horizontal plate.

5. The automatic roll film changing machine according to claim 1, wherein: The top pressing mechanism comprises a top pressing support, a top pressing base and two top pressing heads; the top pressing support is horizontally arranged on one side of the frame; the top pressing base is horizontally arranged on the top pressing support; and the two top pressing heads are arranged on two ends of the top pressing base respectively.

6. A machine for automatically changing a film web according to claim 5, characterized in that: The lower diaphragm opening mechanism comprises a second diaphragm supporting plate, a first lower diaphragm replacing assembly, a second lower diaphragm replacing assembly, a lower guide wheel push rod, a second linear guide rod and a push rod lifting driving device. The second diaphragm supporting plate is horizontally arranged on the top pressing base. The first and second lower diaphragm replacing assemblies are arranged on the two ends of the second diaphragm supporting plate. The lower guide wheel push rod is horizontally arranged below the first and second lower diaphragm replacing assemblies. The lower guide wheel push rod is movably arranged on the top pressing support through the second linear guide rod. The push rod lifting driving device is vertically arranged on the top pressing support and is in transmission connection with the lower guide wheel push rod. The first lower diaphragm replacing assembly comprises a fourth guide roller, a fifth guide roller, a first lower diaphragm supporting arm and a second lower diaphragm supporting arm. The fourth and fifth guide rollers are horizontally arranged on one end of the second diaphragm supporting plate and are vertically arranged with the second diaphragm supporting plate respectively. The fourth and fifth guide rollers are arranged on the two sides of one of the top pressing heads respectively. The first and second lower diaphragm supporting arms are arranged on the same end of the second diaphragm supporting plate. The first lower diaphragm supporting arm comprises a lower diaphragm supporting lever, a lower diaphragm supporting guide wheel, a lower diaphragm supporting cross rod and a lower diaphragm supporting roller. The lower diaphragm supporting lever is rotatably connected with the second diaphragm supporting plate through a third shaft pin. The lower diaphragm supporting lever is arranged in an L shape. The lower diaphragm supporting guide wheel is arranged on the lower end of the lower diaphragm supporting lever. The lower diaphragm supporting cross rod is horizontally arranged on the upper end of the lower diaphragm supporting lever. The lower diaphragm supporting roller is horizontally arranged on the lower diaphragm supporting cross rod and is vertically arranged with the lower diaphragm supporting lever. The second lower diaphragm supporting arm is arranged in a mirror image symmetry with the first lower diaphragm supporting arm. The upper end of the lower diaphragm supporting lever of the first lower diaphragm supporting arm and the upper end of the lower diaphragm supporting lever of the second lower diaphragm supporting arm are connected with a second elastic member.

7. A machine for automatically changing a film roll according to claim 6, characterized in that: The structure and working principle of the second lower diaphragm replacing assembly are the same as those of the first lower diaphragm replacing assembly. The second lower diaphragm replacing assembly supports the lower diaphragm on the other top pressing head.

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