Lamination equipment

Abstract

The present invention relates to the field of battery production technology, and in particular to a pressing device. In this application, a first feeding mechanism, a second feeding mechanism, and a third feeding mechanism for feeding a first electrode sheet, a diaphragm sheet, and a second electrode sheet are respectively installed corresponding to different stations of the same conveying mechanism, and a pressing mechanism for pressing the first electrode sheet, the diaphragm sheet, and the second electrode sheet is also installed corresponding to the conveying mechanism, so that the first electrode sheet, the diaphragm sheet, and the second electrode sheet can be loaded in sequence at different stations of the same pressing device, and finally can be pressed to form a battery cap; thereby, the positioning, loading, and pressing of the electrode sheet and the diaphragm sheet 22 can be concentrated on the same production and processing line and processed mechanically, without manual positioning and loading, with a high degree of automation and low labor intensity, which can improve the processing efficiency of the battery cap and optimize the integration effect of the pressing device.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a pressing device. Background Art

[0002] During battery processing, the positive and negative electrodes are stacked with a separator sheet between them, then heated and pressurized to form the battery cap. To prevent short circuits between the positive and negative electrodes, the separator sheet needs to be positioned and placed between them. In existing technology, the positioning and loading of the electrode and separator sheets are often done manually, and then pressed together using a pressing mechanism. This results in a low degree of automation, a long processing cycle, high labor intensity, and large manual errors, resulting in poor processing efficiency for the battery cap. Summary of the Invention

[0003] The main purpose of the present invention is to provide a pressing device, which aims to solve the technical problem of low automation level in battery cap processing in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention proposes a pressing device for pressing an electrode sheet and a diaphragm sheet, and the pressing device includes a conveying mechanism, a carrying jig, a first loading mechanism, a second loading mechanism, a third loading mechanism and a pressing mechanism: the conveying mechanism is formed with a first loading station, a second loading station, a third loading station and a pressing station; the carrying jig is installed on the conveying mechanism, and the carrying jig is used to carry the electrode sheet and the diaphragm sheet; the conveying mechanism is used to convey the carrying jig from the first loading station to the second loading station, the third loading station and the pressing station in sequence; the first loading mechanism is arranged corresponding to the first loading station, The first loading mechanism is used to load the first electrode sheet onto the supporting jig; the second loading mechanism is arranged corresponding to the second loading station, and the second loading mechanism is used to load the diaphragm sheet onto the supporting jig to stack the diaphragm sheet on the first electrode sheet; the third loading mechanism is arranged corresponding to the third loading station, and the third loading mechanism is used to load the second electrode sheet onto the supporting jig to stack the second electrode sheet on the diaphragm sheet; the pressing mechanism is arranged corresponding to the pressing station, and the pressing mechanism is used to press the first electrode sheet, the diaphragm sheet and the second electrode sheet stacked on the supporting jig to form a battery cap.

[0005] Optionally, the second feeding mechanism includes a stamping device, which includes a stamping die and a coiling mechanism; the stamping die includes a support platform, a pressure block, a die tool and a vacuum mechanism; the support platform has a support surface, and the support surface is provided with a first die hole and a second die hole; the pressure block is movably mounted on the support platform and is located on one side of the support surface to approach or move away from the support surface; the pressure block is used to press the material strip onto the support surface so that the material strip covers the first die hole and the second die hole; the die tool includes a first tool and a second tool, and the cutting area of the second tool is larger than the cutting area of the first tool; the first tool is movably mounted on the support platform and arranged opposite to the first die hole to extend into or exit the first die hole; the second tool is movably mounted on the support platform and arranged opposite to the second die hole They are arranged relative to each other to extend into or exit the second die hole; the first tool is used to cut a hollow area from the material strip when extending into the first die hole; the second tool is used to extend into the second die hole when the hollow area falls into the projection of the second die hole, so as to cut the diaphragm sheet from the periphery of the hollow area of the material strip; the second tool is provided with a connected air hole and an air channel, and the air hole is provided at the blade end of the second tool; the vacuum mechanism is installed on the support platform, and the air channel is connected to the vacuum port of the vacuum mechanism, and the vacuum mechanism is used to adjust the vacuum degree of the air channel; the winding mechanism includes a unwinding component and a winding component, the unwinding component is used to unwind the material strip before cutting, and the winding component is used to wind up the remaining material strip after cutting; the support platform is located on the material path of the material strip so that the material strip passes through the support surface.

[0006] Optionally, the second loading mechanism further includes a lifting mechanism, which can be lifted and lowered below the stamping die; the lifting mechanism is used to lift the supporting jig or the first electrode sheet toward the direction close to the second die hole when the supporting jig is transported to the second loading station.

[0007] Optionally, the conveying mechanism includes a turntable, and the first loading station, the second loading station, the third loading station and the pressing station are distributed around the axis of the turntable; the first loading mechanism, the second loading mechanism, the third loading mechanism and the pressing mechanism are arranged on the peripheral side of the turntable and distributed along the circumference of the turntable.

[0008] Optionally, the conveying mechanism also forms a first heating station, and on the conveying path of the conveying mechanism, the first heating station is located between the first loading station and the second loading station; the pressing equipment also includes a first heating mechanism, and the first heating mechanism is arranged corresponding to the first heating station; the first heating mechanism is used to heat the first electrode sheet on the supporting jig.

[0009] Optionally, the conveying mechanism is also formed with a second heating station, and on the conveying path of the conveying mechanism, the second heating station is located between the third loading station and the pressing station; the pressing equipment also includes a second heating mechanism, and the second heating mechanism is arranged corresponding to the second heating station; the second heating mechanism is used to heat the first electrode sheet, the diaphragm sheet and the second electrode sheet on the supporting jig.

[0010] Optionally, the conveying mechanism is further formed with a third heating station, and on the conveying path of the conveying mechanism, the third heating station is located between the second heating station and the pressing station; the pressing equipment also includes a third heating mechanism, and the third heating mechanism is arranged corresponding to the third heating station; the third heating mechanism is used to heat the first electrode sheet, the diaphragm sheet and the second electrode sheet on the supporting jig, and the heating temperature of the third heating mechanism is higher than the heating temperature of the second heating mechanism.

[0011] Optionally, the third heating mechanism includes a fixed frame, an electromagnetic heating coil and a transmission member; the electromagnetic heating coil is installed on the fixed frame, and the transmission member can be movably installed on the fixed frame to approach or move away from the electromagnetic heating coil; the supporting fixture is provided with a through hole, and the hole wall of the through hole is protruded with a supporting boss, and the supporting boss is used to support the stacked first electrode sheet, diaphragm sheet and second electrode sheet; the transmission member has a first position away from the electromagnetic heating coil, and a second position close to the electromagnetic heating coil, the first position is located below the third heating station, and the electromagnetic heating coil is located above the third heating station; when the supporting fixture is transported to the third heating station, the transmission member extends into the through hole from below the supporting fixture, and pushes the stacked first electrode sheet, diaphragm sheet and second electrode sheet out of the through hole and then drives them to the second position.

[0012] Optionally, the conveying mechanism is also formed with a detection station, and the detection station is located downstream of the pressing station on the conveying path of the conveying mechanism; the pressing equipment also includes a detection mechanism, and the detection mechanism is arranged corresponding to the detection station; the detection mechanism is used to detect whether the first electrode sheet and the second electrode sheet on the supporting fixture are short-circuited.

[0013] Optionally, the conveying mechanism is further formed with a blanking station, and on the conveying path of the conveying mechanism, the blanking station is located downstream of the inspection station; the pressing equipment also includes a blanking mechanism, and the blanking mechanism is arranged corresponding to the blanking station; the blanking mechanism is used to blank the battery caps on the supporting fixture.

[0014] In the pressing equipment of the present invention, the first feeding mechanism, the second feeding mechanism and the third feeding mechanism for feeding the first electrode sheet, the diaphragm sheet and the second electrode sheet respectively are installed corresponding to different stations of the same conveying mechanism, and the pressing mechanism for pressing the first electrode sheet, the diaphragm sheet and the second electrode sheet is also installed corresponding to the conveying mechanism, so that the first electrode sheet, the diaphragm sheet and the second electrode sheet can be loaded in sequence at different stations of the same pressing equipment, and can finally be pressed to form a battery cap; thus, the positioning, loading and pressing of the electrode sheet and the diaphragm sheet can be concentrated on the same production and processing line and processed mechanically, without manual positioning and loading, with a high degree of automation and low labor intensity, which can improve the processing efficiency of the battery cap and optimize the integration effect of the pressing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a laminating device of the present invention;

[0017] Figure 2 A top view of an embodiment of a lamination device according to the present invention;

[0018] Figure 3 A top view of an embodiment of a conveying mechanism of the present invention;

[0019] Figure 4 It is a structural schematic diagram of another embodiment of the lamination device of the present invention;

[0020] Figure 5 is a schematic top view of another embodiment of the lamination device of the present invention;

[0021] Figure 6 Schematic diagram of the structure of an embodiment of the second feeding mechanism of the present invention;

[0022] Figure 7 Schematic diagram of the structure of an embodiment of the die device of the present invention;

[0023] Figure 8 A cross-sectional view of an embodiment of a die device according to the present invention;

[0024] Figure 9 for Figure 8 A partial enlarged view of point A in the middle;

[0025] Figure 10Schematic diagram of the process of cutting the material strip into the diaphragm sheet in the present invention;

[0026] Figure 11 Schematic diagram of the structure of the second tool in the present invention;

[0027] Figure 12 is a cross-sectional view of the second tool in the present invention;

[0028] Figure 13 This is a structural diagram of an embodiment of a supporting fixture, a first electrode sheet, a diaphragm sheet, and a second electrode sheet in the present invention;

[0029] Figure 14 Schematic diagram of the structure of an embodiment of the third heating mechanism of the present invention;

[0030] Figure 15 It is a structural schematic diagram of an embodiment of the detection mechanism in the present invention.

[0031] Description of Figure Numbers:

[0032]

[0033]

[0034] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] During battery processing, the battery cap, formed by stacking the electrode sheets and the diaphragm sheet 22, typically undergoes heat pressing to prevent the cap from loosening. In related art, the stacking and pressing processes for the electrode sheets and diaphragm sheet 22 are typically performed on separate production lines, resulting in poor processing efficiency for the battery cap.

[0039] The present invention provides a pressing device for pressing electrode sheets and a diaphragm sheet 22 together to form a battery cap. The electrode sheets include a first electrode sheet 21 and a second electrode sheet 23, one of which is a positive electrode sheet and the other is a negative electrode sheet. The diaphragm sheet 22 is disposed between the first electrode sheet 21 and the second electrode sheet 23.

[0040] In the embodiment of the present invention, Figures 1 to 3 As shown, Figure 1 It is a structural schematic diagram of an embodiment of a laminating device of the present invention; Figure 2 A top view of an embodiment of a lamination device according to the present invention; Figure 3 FIG. 1 is a top view of an embodiment of the conveying mechanism 10 of the present invention.

[0041] The laminating device includes a conveying mechanism 10, a carrying jig 20, a first loading mechanism 30, a second loading mechanism 40, a third loading mechanism 50, and a laminating mechanism 60. The conveying mechanism 10 is formed with a first loading station 11, a second loading station 12, a third loading station 13, and a laminating station 14. The carrying jig 20 is installed on the conveying mechanism 10, and the carrying jig 20 is used to carry the electrode sheet and the diaphragm sheet 22. The conveying mechanism 10 is used to transport the carrying jig 20 from the first loading station 11 to the second loading station 12, the third loading station 13, and the laminating station 14 in sequence. The first loading mechanism 30 is arranged corresponding to the first loading station 11, and the first loading mechanism 30 is used to load the first electrode sheet 21 onto the carrying jig 20. The second loading mechanism 40 is provided corresponding to the second loading station 12 and is used to load the diaphragm sheet 22 onto the supporting jig 20 to laminate the diaphragm sheet 22 onto the first electrode sheet 21. The third loading mechanism 50 is provided corresponding to the third loading station 13 and is used to load the second electrode sheet 23 onto the supporting jig 20 to laminate the second electrode sheet 23 onto the diaphragm sheet 22. The pressing mechanism 60 is provided corresponding to the pressing station 14 and is used to press the first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23 laminated on the supporting jig 20 to form a battery cap.

[0042] In this embodiment, the conveying mechanism 10 includes a carrying platform, with a first loading station 11, a second loading station 12, a third loading station 13, and a pressing station 14 disposed on the carrying surface of the carrying platform. When conveying the carrying jig 20, the conveying mechanism 10 can use a robotic arm to pick up the carrying jig 20 from one station and place it on the next, or the carrying platform itself can move to transport the carrying jig 20, without limitation.

[0043] The supporting jig 20 is used to support the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 to be pressed together, as well as the battery cap formed after pressing. It is understood that each of the first loading station 11, the second loading station 12, the third loading station 13, and the pressing station 14 can be equipped with a corresponding supporting jig 20. This ensures that each station has a supporting jig 20 each time the conveying mechanism 10 is conveying, allowing the processing mechanisms corresponding to each station to operate simultaneously without waiting.

[0044] The first loading mechanism 30 includes a vibrating material preparation device and a picking module. The picking module can move back and forth between the vibrating material preparation device and the first loading station 11. The picking module is used to pick up the first electrode sheet 21 from the vibrating material preparation device and then transport it to the supporting jig 20 located on the first loading station 11. The vibrating material preparation device can prevent the first electrode sheet 21 from stacking in the loading area by vibrating, thereby preventing the picking module from taking and placing the stacked first electrode sheet 21 on the supporting jig 20. In addition, the vibrating material preparation device is also provided with a sensor, which is used to detect the forward and reverse directions of the first electrode sheet 21 and blow the reverse first electrode sheet 21 to the upstream of the loading area, thereby ensuring that the pressed surface of the first electrode sheet 21 faces upward, so as to improve the loading accuracy of the first electrode sheet 21.

[0045] After the support jig 20 receives the first electrode sheet 21 at the first loading station 11, the conveyor mechanism 10 transports the support jig 20 to the second loading station 12. The second loading mechanism 40 stacks the diaphragm sheet 22 on the first electrode sheet 21. The diaphragm sheet 22 can be circular or annular. The diaphragm sheet 22 can be pre-processed and placed on the second loading mechanism 40, or it can be processed immediately by the second loading mechanism 40, without limitation.

[0046] After the supporting jig 20 receives the diaphragm sheet 22 at the second loading station 12, the conveying mechanism 10 conveys the supporting jig 20 to the third loading station 13. The third loading mechanism 50 includes a vibrating material preparation device and a material taking module. The material taking module can move back and forth between the vibrating material preparation device and the third loading station 13. The material taking module is used to suck the second electrode sheet 23 from the vibrating material preparation device and convey it to be stacked on the diaphragm sheet 22. The vibrating material preparation device can prevent the second electrode sheet 23 from being stacked in the loading area by vibrating, thereby preventing the material taking module from taking and placing the stacked second electrode sheet 23 on the supporting jig 20. In addition, the vibrating material preparation device is also provided with a sensor, which is used to detect the forward and reverse direction of the second electrode sheet 23, and blow the reverse second electrode sheet 23 to the upstream of the loading area, thereby ensuring that the pressed surface of the second electrode sheet 23 faces downward, so as to improve the loading accuracy of the second electrode sheet 23.

[0047] After the supporting jig 20 receives the second electrode sheet 23 at the third loading station 13, the conveying mechanism 10 conveys the supporting jig 20 to the pressing station 14. The pressing mechanism 60 includes a pressing member that can apply pressure to the stacked first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23 from one side of the second electrode sheet 23; or can apply pressure from one side of the first electrode sheet 21 and one side of the second electrode sheet 23 in both directions; there is no limitation here, as long as the pressing mechanism 60 can press the stacked first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23 to form the battery cap.

[0048] In order to ensure the pressing effect, in some embodiments of the present application, the pressing member is made of an electric heating member, which applies pressure to the first electrode sheet 21 , the diaphragm sheet 22 and the second electrode sheet 23 while also heating them.

[0049] In the laminating device of the present invention, the first loading mechanism 30, the second loading mechanism 40, and the third loading mechanism 50 for loading the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23, respectively, are installed corresponding to different stations of the same conveying mechanism 10, and the pressing mechanism 60 for pressing the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 is also installed corresponding to the conveying mechanism 10, so that the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 can be loaded and positioned in sequence at different stations of the same laminating device, and finally pressed together to form a battery cap. As a result, the positioning, loading, and pressing of the electrode sheet and the diaphragm sheet 22 can be concentrated on the same production line and processed mechanically, without the need for manual positioning and loading, with a high degree of automation and low labor intensity, which can improve the processing efficiency of the battery cap and optimize the integration effect of the laminating device.

[0050] For example, Figures 6 to 12 As shown, Figure 6 Schematic diagram of the structure of an embodiment of the second feeding mechanism 40 of the present invention; Figure 7 Schematic diagram of the structure of an embodiment of the die device of the present invention; Figure 8 A cross-sectional view of an embodiment of a die device according to the present invention; Figure 9 for Figure 8 A partial enlarged view of point A in the middle; Figure 10 Schematic diagram of the process of cutting the diaphragm sheet 22 from the material strip 220 in the present invention; Figure 11 Schematic diagram of the structure of the second tool 44 in the present invention; Figure 12 4 is a cross-sectional view of the second tool 44 in the present invention.

[0051] The second feeding mechanism 40 includes a stamping device, which includes a stamping die 401 and a coiling mechanism; the stamping die 401 includes a support platform 41, a pressure block 42, a die tool and a vacuum mechanism; the support platform 41 has a support surface 411, and the support surface 411 is provided with a first die hole 412 and a second die hole 413.

[0052] The pressing block 42 is movably mounted on the support platform 41 and is located on one side of the support surface 411, so as to move closer to or further away from the support surface 411. The pressing block 42 is used to press the material strip 220 against the support surface 411 so that the material strip 220 covers the first die hole 412 and the second die hole 413. The die cutter includes a first cutter 43 and a second cutter 44. The cutting area of the second cutter 44 is larger than the cutting area of the first cutter 43. The first cutter 43 is movably mounted on the support platform 41 and is disposed opposite the first die hole 412, so as to extend into or out of the first die hole 412. The second cutter 44 is movably mounted on the support platform 41 and is disposed opposite the second die hole 413, so as to extend into or out of the second die hole 413.

[0053] The first cutter 43 is used to cut out the hollow area 221 from the material strip 220 when it extends into the first die hole 412. The second cutter 44 is used to extend into the second die hole 413 when the hollow area 221 falls into the projection of the second die hole 413, so as to cut the diaphragm sheet 22 from the periphery of the hollow area 221 of the material strip 220. The second cutter 44 is provided with a connected air hole 441 and an air channel 442. The air hole 441 is provided at the blade end of the second cutter 44.

[0054] A vacuum mechanism is mounted on the support platform 41. The air passage 442 is connected to the vacuum port of the vacuum mechanism, and the vacuum mechanism is used to adjust the vacuum level in the air passage 442. The winding mechanism includes an unwinding assembly 46 and a rewinding assembly 47. The unwinding assembly 46 unwinds the uncut material strip 220, while the rewinding assembly 47 rewinds the remaining material strip 220 after cutting. The support platform 41 is located in the material strip 220's path, allowing the material strip 220 to pass over the support surface 411.

[0055] In this embodiment, the support surface 411 can be the top surface of the support platform 41 or the side surface of the support platform 41. In this embodiment, the support surface 411 is taken as the top surface of the support platform 41. The material strip 220 can move along the support surface 411, and the first die hole 412 and the second die hole 413 are arranged along the movement direction of the material strip 220, that is, when the material strip 220 moves along the support surface 411, it first passes through the first die hole 412 and then passes through the second die hole 413. The movement direction of the pressing block 42 is perpendicular to the support surface 411. For example, the pressing block 42 is installed above the support surface 411 and can move up and down in the vertical direction. When the pressing block 42 abuts against the support surface 411, it can press the material strip 220. When the pressing block 42 leaves the support surface 411, it can loosen the material strip 220. The stamping die 401 further includes a first driving device installed on the support platform 41 , and the first driving device is used to drive the pressing block 42 to move, so that the pressing block 42 can automatically press or release the material strip 220 .

[0056] The first cutter 43 and the second cutter 44 are mounted above the support surface 411 and can move up and down along the axial direction of the first die hole 412 and the second die hole 413. The first cutter 43 and the second cutter 44 are arranged in a columnar shape. The blade of the first cutter 43 is arranged on the circumference of the end face of the first cutter 43, and the blade of the second cutter 44 is arranged on the circumference of the end face of the second cutter 44. The end face of the second cutter 44 is larger than the end face of the first cutter 43, so the cutting range of the second cutter 44 will be larger than that of the first cutter 43. The stamping die 401 also includes a second drive device mounted on the support platform 41, and the second drive device is used to drive the first cutter 43 and the second cutter 44 to move, so that the first cutter 43 and the second cutter 44 cut the material strip 220.

[0057] The air passage 442 can extend axially along the second cutter 44 and penetrate the end of the second cutter 44 away from its blade. The vacuum of the vacuum mechanism is connected to the air passage 442 through the top of the second cutter 44. By adjusting the vacuum level of the air passage 442, the vacuum mechanism can generate negative pressure at the air holes 441, thereby adsorbing the diaphragm 22 cut by the second cutter 44. The number of air holes 441 can be multiple, and the multiple air holes 441 are spaced apart along the circumference of the second cutter 44. The number and position of the air passages 442 correspond to the number and position of the air holes 441. The air outlet of the vacuum mechanism is simultaneously connected to multiple air passages 442. In this way, the number of adsorption locations for the diaphragm 22 can be increased, thereby improving the adsorption stability of the diaphragm 22.

[0058] When the stamping die 401 is in operation, the material strip 220 first passes through the first die hole 412. When the material strip 220 covers the first die hole 412, the pressing block 42 descends to press the material strip 220, ensuring that the material strip 220 does not deform when subjected to the force of the stamping tool. After the pressing block 42 presses the material strip 220, the first tool 43 extends into the first die hole 412 and pierces the material strip 220, thereby cutting the scrap material from the material strip 220. In this way, the first tool 43 can first cut out the hollow area 221 in the material strip 220.

[0059] After the hollowed-out area 221 is cut out of the strip 220, the first cutter 43 exits the first die hole 412, the pressing block 42 releases the strip 220, and the strip 220 continues to move toward the second die hole 413. When the strip 220 moves until its hollowed-out area 221 is within the projection of the second die hole 413, the pressing block 42 presses the strip 220 again, and the second cutter 44 extends into the second die hole 413 to cut out the annular diaphragm sheet 22 from the outer periphery of the hollowed-out area 221 on the strip 220.

[0060] After the second cutter 44 cuts the diaphragm 22 , the vacuum mechanism is turned on to increase the vacuum level of the air passage 442 . At this time, the air holes 441 generate negative pressure on the diaphragm 22 , so that the diaphragm 22 can be adsorbed and fixed on the second cutter 44 .

[0061] It should be noted that the second loading station 12 is located below the second die hole 413. After the diaphragm sheet 22 is adsorbed and fixed, the supporting fixture 20 carrying the first electrode sheet 21 comes to the second loading station 12. At this time, the vacuum mechanism is closed, and the diaphragm sheet 22 can fall directly on the first electrode sheet 21, so that the diaphragm sheet 22 just cut can be directly used for pressing.

[0062] The number of the first die holes 412 and the second die holes 413 can be multiple, and the multiple first die holes 412 and the second die holes 413 are arranged along the movement direction of the material strip 220. The number and position of the first cutters 43 and the second cutters 44 correspond to the first die holes 412 and the second die holes 413, respectively. In this way, the multiple first cutters 43 can move simultaneously and cut out multiple hollow areas 221 from the material strip 220 at one time; the multiple second cutters 44 can also move simultaneously and cut out multiple diaphragm sheets 22 from the material strip 220 at one time. It can be understood that the multiple second cutters 44 are each provided with a corresponding air hole 441 and air channel 442, and the vacuum mechanism can be connected to the air channel 442 of the multiple second cutters 44 at the same time.

[0063] The second cutter 44 is provided with an air hole 441 and an air channel 442, and the vacuum degree of the air channel 442 is adjusted by a vacuum mechanism. Thus, after the second cutter 44 cuts the diaphragm sheet 22 from the material strip 220, the vacuum mechanism increases the vacuum degree of the air channel 442, allowing the air hole 441 to adsorb the diaphragm sheet 22, thereby adsorbing and positioning the diaphragm sheet 22 on the second cutter 44. The adsorbed and positioned diaphragm sheet 22 can be directly transferred to the battery cap production line and put into the battery cap pressing process (for example, directly stacked on the prepared electrode sheet). In this way, during the battery cap pressing process, the diaphragm sheet 22 can be cut and used immediately, without the need for pre-processing or re-loading and positioning, thereby improving the production efficiency of the battery cap.

[0064] The winding mechanism can unwind and rewind the material strip 220, so that the material strip 220 can automatically pass through the first die hole 412 and the second die hole 413, and the material strip 220 can be effectively stored and sorted before and after being cut.

[0065] When the carrying jig 20 arrives at the second loading station 12 , the second cutter 44 may descend to bring the diaphragm sheet 22 closer to the first electrode sheet 21 , or the carrying jig 20 may ascend to bring the first electrode sheet 21 closer to the diaphragm sheet 22 .

[0066] For example, Figures 7 to 9As shown, the second loading mechanism 40 further includes a lifting mechanism 45, which is installed below the stamping die 401. The lifting mechanism 45 is used to lift the supporting jig 20 or the first electrode sheet 21 toward the second die hole 413 when the supporting jig 20 is transported to the second loading station 12.

[0067] After the second cutter 44 cuts the diaphragm sheet 22 from the material strip 220 and holds it in place, the lifting mechanism 45 lifts the supporting jig 20 or the first electrode sheet 21 in the second loading station 12 to bring the first electrode sheet 21 as close to the diaphragm sheet 22 as possible. After the first electrode sheet 21 approaches the diaphragm sheet 22, the vacuum mechanism reduces the vacuum level in the air passage 442, allowing the second cutter 44 to release the diaphragm sheet 22, allowing the diaphragm sheet 22 to fall onto the first electrode sheet 21 under the action of gravity. Because the first electrode sheet 21 is close to the second cutter 44, the diaphragm sheet 22 can fall onto the first electrode sheet 21 more quickly, reducing horizontal shaking and thus ensuring the coaxiality between the diaphragm sheet 22 and the first electrode sheet 21.

[0068] Specifically, the lifting mechanism 45 may include a lifting rod 451. The supporting fixture 20 has a through hole 24 formed therein. A supporting boss 25 is provided on the wall of the through hole 24. The supporting boss 25 is used to support the stacked first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23. The lifting rod 451 can pass through the through hole 24 to lift the first electrode sheet 21, thereby eliminating the need to lift the supporting fixture 20 and reducing the load on the lifting mechanism 45.

[0069] The conveying path of the conveying mechanism 10 for the supporting jig 20 can be a straight line or a curve.

[0070] For example, Figure 3 As shown, the conveying mechanism 10 includes a turntable. A first loading station 11, a second loading station 12, a third loading station 13, and a pressing station 14 are arranged around the axis of the turntable. A first loading mechanism 30, a second loading mechanism 40, a third loading mechanism 50, and a pressing mechanism 60 are disposed around the turntable and distributed along its circumference. Configuring the conveying mechanism 10 as a circular turntable makes the structure more compact and reduces floor space.

[0071] The first loading station 11, the second loading station 12, the third loading station 13 and the pressing station 14 are distributed around the circumference of the turntable. The turntable can rotate to realize the switching of the supporting jig 20 between the various stations. After the turntable rotates one circle, the supporting jig 20 returns to the first loading station 11, so there is no need to use other mechanisms to put the supporting jig 20 from the pressing station 14 back to the first loading station 11, thereby improving the working efficiency of the pressing equipment. The setting of the turntable can narrow the total conveying range of the supporting jig 20, making the structure of the pressing equipment more compact, thereby reducing the overall space occupied by the pressing equipment. On the other hand, the pressing equipment can be integrated into a box for transportation.

[0072] For example, Figure 4 and Figure 5 As shown, the conveying mechanism 10 is further formed with a first heating station 15. On the conveying path of the conveying mechanism 10, the first heating station 15 is located between the first loading station 11 and the second loading station 12. The pressing device also includes a first heating mechanism 70, which is arranged corresponding to the first heating station 15. The first heating mechanism 70 is used to heat the first electrode sheet 21 on the supporting fixture 20.

[0073] After the first electrode sheet 21 is loaded, the supporting jig 20 is first transported from the first loading station 11 to the first heating station 15, and then from the first heating station 15 to the second loading station 12. The first heating mechanism 70 includes an electric heating element, which heats the first electrode sheet 21 by contacting or approaching the first electrode sheet 21. After the first electrode sheet 21 is heated, when the diaphragm sheet 22 is stacked on the first electrode sheet 21, the diaphragm sheet 22 can be initially thermally attached to the first electrode sheet 21 by the heat of the first electrode sheet 21, thereby improving the stacking stability of the first electrode sheet 21 and the diaphragm sheet 22 and improving the subsequent pressing effect.

[0074] In some embodiments of the present application, the lifting mechanism 45 and the first heating mechanism 70 are integrally provided, and in this case, the electric heating element is directly provided as the lifting rod 451. The integral provision of the lifting mechanism 45 and the first heating mechanism 70 can reduce heat loss of the first electrode sheet 21, save space, and make the structure more compact and reasonable.

[0075] For example, Figure 4 and Figure 5 As shown, the conveying mechanism 10 is also formed with a second heating station 16. On the conveying path of the conveying mechanism 10, the second heating station 16 is located between the third loading station 13 and the pressing station 14. The pressing equipment also includes a second heating mechanism 80. The second heating mechanism 80 is arranged corresponding to the second heating station 16. The second heating mechanism 80 is used to heat the first electrode sheet 21, the diaphragm sheet 22 and the second electrode sheet 23 on the supporting fixture 20.

[0076] After the second electrode sheet 23 is loaded, the supporting jig 20 is first transported from the third loading station 13 to the second heating station 16, and then from the second heating station 16 to the pressing station 14. The second heating mechanism 80 includes an electric heating element, which heats the first electrode sheet 21 and the second electrode sheet 23 by contacting or approaching at least one of the first electrode sheet 21 and the second electrode sheet 23. After the first electrode sheet 21 and the second electrode sheet 23 are heated, the diaphragm sheet 22 located between the first electrode sheet 21 and the second electrode sheet 23 is also heated, thereby improving the subsequent pressing effect.

[0077] For example, Figure 4 and Figure 5 As shown, the conveying mechanism 10 is further formed with a third heating station 17, which is located between the second heating station 16 and the laminating station 14 along the conveying path of the conveying mechanism 10. The laminating equipment also includes a third heating mechanism 90, which is arranged corresponding to the third heating station 17. The third heating mechanism 90 is used to heat the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 on the supporting jig 20. The heating temperature of the third heating mechanism 90 is higher than the heating temperature of the second heating mechanism 80.

[0078] After the second heating mechanism 80 finishes heating the stacked first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23, the supporting jig 20 is first transported from the second heating station 16 to the third heating station 17, and then transported from the third heating station 17 to the pressing station 14. The third heating mechanism 90 can heat the first electrode sheet 21 and the second electrode sheet 23 by contacting or approaching at least one of the first electrode sheet 21 and the second electrode sheet 23. Since the third heating mechanism 90 heats the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 at a relatively high temperature, the diaphragm sheet 22 can be heat-melted. After heat-melting, the diaphragm sheet 22 can be simultaneously bonded to the first electrode sheet 21 and the second electrode sheet 23, thereby making it easier for the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 to be pressed and fixed.

[0079] Specifically, such as Figure 13 and Figure 14 As shown, Figure 13 This is a structural diagram of an embodiment of the supporting fixture 20, the first electrode sheet 21, the diaphragm sheet 22 and the second electrode sheet 23 in the present invention; Figure 14 Schematic diagram of the structure of an embodiment of the third heating mechanism 90 in the present invention.

[0080] The third heating mechanism 90 includes a fixing frame 91, an electromagnetic heating coil 92, and a transmission member 93. The electromagnetic heating coil 92 is mounted on the fixing frame 91, and the transmission member 93 is movably mounted on the fixing frame 91 to move closer to or away from the electromagnetic heating coil 92. The supporting fixture 20 is provided with a through hole 24, and a supporting boss 25 is protruded from the wall of the through hole 24. The supporting boss 25 is used to support the stacked first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23.

[0081] The transmission member 93 has a first position away from the electromagnetic heating coil 92 and a second position closer to the electromagnetic heating coil 92. The first position is below the third heating station 17, and the electromagnetic heating coil 92 is above the third heating station 17. When the carrier jig 20 is transported to the third heating station 17, the transmission member 93 extends from below the carrier jig 20 into the through hole 24, pushes the stacked first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23 out of the through hole 24, and then drives it to the second position.

[0082] The electromagnetic heating coil 92 heats the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 through the principle of electromagnetic induction. This heating method can heat the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 to a higher temperature more quickly, thereby improving the heating efficiency. On the other hand, during actual processing and production, a high-frequency current can be applied to the electromagnetic heating coil 92 so that the heat tends to the surfaces of the first electrode sheet 21 and the second electrode sheet 23, thereby quickly melting the surface of the diaphragm sheet 22, so that the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 are quickly bonded together, and the energy conversion rate is high.

[0083] The electromagnetic heating coil 92 defines a heating area, and the second position is located within the heating area of the electromagnetic heating coil 92. When the carrier jig 20 is transported to the third heating station 17, the transmission member 93 passes through the through hole 24 and lifts the stacked first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23 to the heating area of the electromagnetic heating coil 92. At this time, the electromagnetic heating coil 92 is energized to rapidly heat the first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23. After heating is completed, the transmission member 93 is lowered back to the first position to return the first electrode sheet 21, diaphragm sheet 22, and second electrode sheet 23 to the carrier jig 20.

[0084] The first electrode sheet 21 , the diaphragm sheet 22 and the second electrode sheet 23 are transferred to the heating area of the electromagnetic heating coil 92 by the transmission member 93 , thereby avoiding heating of the supporting fixture 20 , thereby reducing heat loss of the third heating mechanism 90 and improving efficiency.

[0085] In practical applications, the third heating mechanism 90 may further include a positioning member 94, which is fixed above the second position and close to the electromagnetic heating coil 92. When the transmission member 93 lifts the first electrode sheet 21, the diaphragm sheet 22 and the second electrode sheet 23, it lifts the first electrode sheet 21 at the bottom. After the first electrode sheet 21, the diaphragm sheet 22 and the second electrode sheet 23 reach the second position, the positioning member 94 abuts against the second electrode sheet 23 at the top, thereby cooperating with the transmission member 93 to clamp the first electrode sheet 21, the diaphragm sheet 22 and the second electrode sheet 23 at the second position, so as to improve the stability of the first electrode sheet 21, the diaphragm sheet 22 and the second electrode sheet 23 when they are in the heating area of the electromagnetic heating coil 92.

[0086] The third heating mechanism 90 also includes a cooling assembly, which is arranged on the fixing frame 91. The cooling assembly includes a gas drive device and an air nozzle. The cooling assembly is used to blow air to cool the battery cap after the third heating mechanism 90 finishes heating, so as to prevent the diaphragm 22 from melting at high temperature and causing local short circuit.

[0087] In some embodiments of the present application, the transmission member 93 and the third heating mechanism 90 are integrally provided. In this case, the transmission member 93 is directly provided as an electric heating element. The integral provision of the transmission member 93 and the third heating mechanism 90 can reduce heat loss in the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23, save space, and make the structure more compact and reasonable.

[0088] For example, Figure 4 and Figure 5 As shown, the conveying mechanism 10 is also formed with a detection station 18. On the conveying path of the conveying mechanism 10, the detection station 18 is located downstream of the pressing station 14. The pressing equipment also includes a detection mechanism 100. The detection mechanism 100 is set corresponding to the detection station 18 to detect whether the first electrode sheet 21 and the second electrode sheet 23 on the supporting fixture 20 are short-circuited.

[0089] After the first electrode sheet 21, the diaphragm sheet 22, and the second electrode sheet 23 are pressed together by the pressing mechanism 60 at the pressing station 14 to form the battery cap, the carrying jig 20 is transported to the inspection station 18 for inspection of the battery cap. This allows defective short-circuit products to be screened out before unloading, eliminating the need for post-processing inspection, further improving the efficiency of automated battery cap processing.

[0090] Specifically, such as Figure 15 As shown, Figure 15Schematic diagram of the structure of an embodiment of the detection mechanism 100 of the present invention. The carrying jig 20 is provided with a through hole 24, and the hole wall of the through hole 24 is provided with a supporting boss 25, which is used to support the stacked first electrode sheet 21, the diaphragm sheet 22 and the second electrode sheet 23. The detection mechanism 100 includes a first detection electrode 101 and a second detection electrode 102. The first detection electrode 101 is located below the detection station 18, and the second detection electrode 102 is located above the detection station 18. The first detection electrode 101 and the second detection electrode 102 can be close to each other or away from each other. When the carrying jig 20 is transported to the detection station 18, the first detection electrode 101 and the second detection electrode 102 approach each other to abut against the first electrode sheet 21 and the second electrode sheet 23, respectively.

[0091] After the carrying jig 20 is transported to the inspection station 18, the first inspection electrode 101 extends into the through hole 24 and abuts against the first electrode sheet 21, and the second inspection electrode 102 abuts against the second electrode sheet 23. At this time, voltage can be applied to the first inspection electrode 101 and the second inspection electrode 102. If the first inspection electrode 101 and the second inspection electrode 102 generate current through the battery cap, it means that the battery cap is short-circuited; otherwise, it means that the battery cap inspection has passed.

[0092] For example, Figure 4 and Figure 5 As shown, the conveying mechanism 10 is also formed with a blanking station 19. On the conveying path of the conveying mechanism 10, the blanking station 19 is located downstream of the inspection station 18. The pressing equipment also includes a blanking mechanism 200. The blanking mechanism 200 is arranged corresponding to the blanking station 19. The blanking mechanism 200 is used to blank the battery caps on the supporting fixture 20.

[0093] The unloading mechanism 200 includes a receiving piece and a picking module. The picking module can move back and forth between the receiving piece and the unloading station 19. The picking module uses the supporting fixture 20 on the unloading station 19 to suck the battery caps and then transport them to the receiving piece to realize automatic unloading of the battery caps. The unloading mechanism 200 can classify and place qualified products and defective products according to the inspection results of the inspection mechanism 100.

[0094] Specifically, the laminating apparatus also includes an installation box, within which the conveying mechanism 10, first loading mechanism 30, second loading mechanism 40, third loading mechanism 50, and laminating mechanism 60 are all mounted. Casters are provided on the bottom of the installation box. The installation box serves to house the main mechanisms of the laminating apparatus, and the casters facilitate transport and transfer of the installation box, thereby facilitating the transfer of the entire laminating apparatus. A display screen is mounted on the side wall of the installation box, which displays the real-time temperatures of the first heating mechanism 70, second heating mechanism 80, and the heating elements of the laminating mechanism, facilitating real-time monitoring of heating conditions.

[0095] The above are only optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pressing device for pressing an electrode sheet and a diaphragm sheet, characterized in that: The pressing device comprises: A conveying mechanism, wherein the conveying mechanism is formed with a first loading station, a second loading station, a third loading station and a pressing station; the conveying mechanism includes a carrying platform, and the first loading station, the second loading station, the third loading station and the pressing station are arranged on a carrying surface of the carrying platform; A carrying jig, the carrying jig being mounted on the conveying mechanism, the carrying jig being used to carry the electrode sheet and the diaphragm sheet; the conveying mechanism being used to sequentially convey the carrying jig from the first loading station to the second loading station, the third loading station, and the pressing station; a first loading mechanism, the first loading mechanism being provided corresponding to the first loading station and being used for loading the first electrode sheet onto the supporting jig; a second loading mechanism, the second loading mechanism being provided corresponding to the second loading station, and the second loading mechanism being used to load the diaphragm sheet onto the supporting jig so as to stack the diaphragm sheet on the first electrode sheet; a third loading mechanism, the third loading mechanism being provided corresponding to the third loading station, and the third loading mechanism being used to load the second electrode sheet onto the supporting jig, so as to stack the second electrode sheet on the diaphragm sheet; A pressing mechanism, the pressing mechanism being arranged corresponding to the pressing station and being used for pressing the first electrode sheet, the diaphragm sheet, and the second electrode sheet stacked on the supporting fixture to form a battery cap; The second feeding mechanism includes a punching device, and the punching device includes a punching die and a coiling mechanism; The stamping die includes a support platform, a pressing block, a die tool and a vacuum mechanism; The support platform has a support surface, and the support surface is provided with a first die hole and a second die hole; The pressing block is movably mounted on the support platform and is located on one side of the support surface so as to be close to or away from the support surface; the pressing block is used to press the material strip onto the support surface so that the material strip covers the first die hole and the second die hole; The die cutter includes a first cutter and a second cutter, wherein the cutting area of the second cutter is larger than the cutting area of the first cutter; the first cutter is movably mounted on the support platform and is disposed opposite to the first die hole so as to extend into or exit the first die hole; the second cutter is movably mounted on the support platform and is disposed opposite to the second die hole so as to extend into or exit the second die hole; The first cutting tool is used to cut out a hollow area from the material strip when extending into the first die hole; The second cutting tool is used to extend into the second punch hole when the hollow area falls into the projection of the second punch hole, so as to cut the diaphragm sheet from the periphery of the hollow area of the material strip; The second tool is provided with a communicating air hole and an air passage, and the air hole is provided at the blade end of the second tool; The vacuum mechanism is installed on the support platform, the air passage is connected to the vacuum port of the vacuum mechanism, and the vacuum mechanism is used to adjust the vacuum degree of the air passage; The winding mechanism includes a unwinding component and a winding component. The unwinding component is used to unwind the material strip before cutting, and the winding component is used to wind up the remaining material strip after cutting. The support platform is located on the material feeding path of the material strip so that the material strip passes through the support surface.

2. The lamination device according to claim 1, wherein: The second loading mechanism also includes a lifting mechanism, which is installed in a liftable manner below the stamping die; the lifting mechanism is used to lift the carrying jig or the first electrode sheet toward the direction close to the second die hole when the carrying jig is transported to the second loading station.

3. The lamination device according to claim 1, wherein: The conveying mechanism includes a turntable, and the first loading station, the second loading station, the third loading station and the pressing station are distributed around the axis of the turntable; the first loading mechanism, the second loading mechanism, the third loading mechanism and the pressing mechanism are arranged on the peripheral side of the turntable and distributed along the circumference of the turntable.

4. The lamination device according to claim 1, wherein: The conveying mechanism also forms a first heating station, and on the conveying path of the conveying mechanism, the first heating station is located between the first loading station and the second loading station; the pressing equipment also includes a first heating mechanism, and the first heating mechanism is arranged corresponding to the first heating station; the first heating mechanism is used to heat the first electrode sheet on the supporting fixture.

5. The pressing device according to any one of claims 1 to 4, characterized in that The conveying mechanism also forms a second heating station, and on the conveying path of the conveying mechanism, the second heating station is located between the third loading station and the pressing station; the pressing equipment also includes a second heating mechanism, and the second heating mechanism is arranged corresponding to the second heating station; the second heating mechanism is used to heat the first electrode sheet, the diaphragm sheet and the second electrode sheet on the supporting fixture.

6. The lamination device according to claim 5, wherein: The conveying mechanism also forms a third heating station, and on the conveying path of the conveying mechanism, the third heating station is located between the second heating station and the pressing station; the pressing equipment also includes a third heating mechanism, and the third heating mechanism is arranged corresponding to the third heating station; the third heating mechanism is used to heat the first electrode sheet, the diaphragm sheet and the second electrode sheet on the supporting fixture, and the heating temperature of the third heating mechanism is higher than the heating temperature of the second heating mechanism.

7. The lamination device according to claim 6, wherein: The third heating mechanism includes a fixing frame, an electromagnetic heating coil and a transmission member; The electromagnetic heating coil is mounted on the fixing frame, and the transmission member is movably mounted on the fixing frame to move closer to or farther away from the electromagnetic heating coil; The supporting fixture is provided with a through hole, and a supporting boss is protruded from the hole wall of the through hole, and the supporting boss is used to support the stacked first electrode sheet, the diaphragm sheet and the second electrode sheet; The transmission member has a first position away from the electromagnetic heating coil and a second position close to the electromagnetic heating coil, the first position is located below the third heating station, and the electromagnetic heating coil is located above the third heating station; When the carrying jig is transported to the third heating station, the transmission member extends from below the carrying jig into the through hole, pushes the stacked first electrode sheet, diaphragm sheet and second electrode sheet out of the through hole and then drives them to the second position.

8. The lamination device according to claim 1, wherein: The conveying mechanism also forms a detection station, which is located downstream of the pressing station on the conveying path of the conveying mechanism; the pressing equipment also includes a detection mechanism, which is arranged corresponding to the detection station; the detection mechanism is used to detect whether the first electrode sheet and the second electrode sheet on the supporting fixture are short-circuited.

9. The lamination device according to claim 8, wherein: The conveying mechanism is also formed with a blanking station, and on the conveying path of the conveying mechanism, the blanking station is located downstream of the detection station; the pressing equipment also includes a blanking mechanism, and the blanking mechanism is arranged corresponding to the blanking station; the blanking mechanism is used to blank the battery caps on the supporting fixture.

Images