Battery cell pre-pressing mechanism and battery cell winding machine

Abstract

The invention discloses a battery cell pre-pressing mechanism and a battery cell winding machine, and relates to the technical field of lithium battery, the battery cell pre-pressing mechanism comprises a winding device, the top of the winding device is provided with a material returning mechanism used for rapidly taking out a pre-pressed battery cell from a mold, the device is provided with the material returning mechanism, after a cylindrical battery cell is pre-pressed, a U-shaped supporting plate inclines upwards, and the battery cell is wound on the U-shaped supporting plate; according to the utility model, the U-shaped supporting plate is arranged, so that the battery cell slides off from the U-shaped supporting plate, the opportunity of directly touching the battery cell by hand is reduced, the risk of damaging the battery cell due to improper manual operation is reduced, the direct contact between an operator and the battery cell and a mold which are possibly still in a higher temperature state is reduced, and the risk of occupational injury such as scald caused by high temperature is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a battery cell pre-pressing mechanism and a battery cell winding machine. Background Art

[0002] The battery cell is the basic unit of the battery, which is composed of a positive electrode, a negative electrode, a separator and an electrolyte. Battery cell pre-pressing refers to the compression of the battery cell when assembling the battery. During this process, the positive electrode, the negative electrode and the separator are evenly exerted with the same pressure, so that their internal structure is more closely connected. There are two methods for battery cell pre-pressing: mechanical pre-pressing and hydraulic pre-pressing.

[0003] During the mechanical pre-pressing process, the battery cell is placed in a pre-pressing mold, and the pressure of the mold is used to move the positive electrode sheet, negative electrode sheet and diaphragm inside the battery cell in the same direction to achieve a predetermined degree of compression. During the production process, cylindrical batteries usually undergo a process called pre-pressing or hot pressing, which aims to improve the consistency of the internal structure of the battery cell and improve the performance of the battery cell. In this process, the battery cell will be placed in a specific mold and pressed under certain temperature and pressure conditions. After the pressing is completed, the battery cell needs to be removed from the mold.

[0004] The process of removing the battery cell from the mold relies on the workers’ experience and skills. If the force is not properly controlled, it will cause mechanical damage to the battery cell, such as scratches, indentations or deformation, which may affect the performance of the battery cell.

[0005] Therefore, the present invention proposes a battery cell pre-pressing mechanism and a battery cell winding machine to make up for and improve the deficiencies of the prior art. Summary of the invention

[0006] In view of the above problems, the invention provides a battery cell pre-pressing mechanism, which can effectively solve the problem of battery cell damage when the battery cell is manually removed in the prior art. In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:

[0007] The present invention discloses a battery cell pre-pressing mechanism, comprising a winding device, wherein a material unloading mechanism for quickly taking out a pre-pressed battery cell from a mold is arranged on the top of the winding device, and a material loading mechanism for quickly and safely placing a cylindrical battery cell into the mold is also arranged on one side of the top of the winding device, and a material unloading port is provided on the winding device between the material unloading mechanism and the material loading mechanism;

[0008] The material unloading mechanism includes a base fixedly connected to the top of the winding device, a plurality of accommodating grooves are opened on the top of the base, a U-shaped pallet is arranged inside each accommodating groove, one end of each of the U-shaped pallets is rotatably connected to the base by a hinge, the other end of each of the U-shaped pallets is fixedly connected to a connecting rod, and a plurality of the connecting rods are fixedly connected by a cross bar, an auxiliary component for pushing the battery cell stuck in the U-shaped pallet is arranged on the side of the connecting rod, and a linkage component for mobilizing the rotation of the U-shaped pallet is arranged between the cross bar and the pressure plate.

[0009] Furthermore, the material unloading mechanism also includes a bracket fixedly connected to the top of the winding device, the bracket is located directly above the base, and a hydraulic cylinder is fixedly connected to the top of the bracket, a pressure plate is fixedly connected to the output end of the hydraulic cylinder, a guide rod is symmetrically fixedly connected to the top of the pressure plate, and the guide rod is slidably connected to the bracket.

[0010] Furthermore, the auxiliary component includes a push rod that slides horizontally through the U-shaped support plate, one end of the push rod is fixedly connected to a movable plate, the movable plate is located inside the U-shaped support plate, the other end of the push rod is fixedly connected to a mounting plate, a first spring is sleeved on the outside of the push rod, the first spring is located outside the U-shaped support plate, the mounting plate is rotatably connected to a first connecting rod at one end away from the push rod, the first connecting rod is rotatably connected to a second connecting rod at one end away from the mounting plate, and the second connecting rod is rotatably connected to a side surface of the connecting rod at one end away from the first connecting rod.

[0011] Furthermore, the linkage assembly includes an L-shaped connecting rod fixedly connected to the pressure plate, the vertical section of the L-shaped connecting rod is provided with a first sliding groove, an insertion rod is slidably connected in the first sliding groove, one end of the insertion rod is fixedly connected to the cross bar, and a baffle is also fixedly connected to the side of the bracket, and the baffle is located directly above the connection between the first connecting rod and the second connecting rod.

[0012] Furthermore, the feeding mechanism includes a slide rail fixedly connected to the top of the winding device, the top of the slide rail is slidably connected to a moving seat, the top of the moving seat is fixedly connected to a storage barrel, the side of the moving seat is rotatably connected to a push-pull rod, and the push-pull rod is rotatably connected to the side of the connecting rod at one end away from the moving seat.

[0013] Furthermore, each of the storage barrels is fixedly connected to a U-shaped docking plate on the side close to the base, and a through hole for the battery cell to pass through is opened between the docking plate and the storage barrel, a funnel is fixedly connected to the top of the storage barrel, and each of the storage barrels is provided with a pushing component for pushing the battery cell out of the storage barrel on the side away from the docking plate.

[0014] Furthermore, the pushing assembly includes a sleeve fixedly connected to the side of the storage barrel away from the docking plate, and the sleeve and the storage barrel are communicated with each other, a first slide rod is horizontally slidably connected inside the sleeve, a limit block is fixedly connected to the outside of the first slide rod, and the limit block is located outside the sleeve, one end of the first slide rod is fixedly connected to a second slide rod, the second slide rod is slidably sleeved with a protrusion at one end away from the first slide rod, the protrusion is fixedly connected to the winding device, and a second spring is also sleeved on the outside of the second slide rod.

[0015] Furthermore, the feeding mechanism also includes a positioning component, which includes a mounting seat fixedly connected to the top of the winding device, a telescopic plate slidably connected in the cavity at the top of the mounting seat, a plurality of third springs fixedly connected to the bottom of the telescopic plate, the third springs are located inside the cavity of the mounting seat, a slot is provided on the side of the first slide rod, and the slot is adapted to the top of the telescopic plate, and a slope is also provided on one end of the first slide rod close to the telescopic plate.

[0016] Furthermore, the positioning assembly also includes second sliding grooves opened on both sides of the mounting seat, and a third sliding rod is slidably connected inside each second sliding groove, one end of the third sliding rod is fixedly connected to the side of the telescopic plate, and the ends of the two third sliding rods away from the telescopic plate are fixedly connected to the U-shaped handle.

[0017] A battery cell winding machine comprises a winding device, wherein a material unloading mechanism for quickly removing a pre-pressed battery cell from a mold is arranged on the top of the winding device, a material loading mechanism for quickly and safely placing a cylindrical battery cell into the mold is also arranged on one side of the top of the winding device, and a material unloading port is provided on the winding device between the material unloading mechanism and the material loading mechanism.

[0018] Beneficial effects:

[0019] 1. This device is provided with a material return mechanism. After pre-pressing the cylindrical battery cell, the U-shaped support plate tilts upward, so that the battery cell slides off the U-shaped support plate, reducing the chance of direct hand contact with the battery cell, thereby reducing the risk of damaging the battery cell due to improper human operation, and reducing the direct contact between the operator and the battery cell and the mold that may still be in a high temperature state.

[0020] 2. The device is provided with an auxiliary component. After the U-shaped support plate tilts upward, the first connecting rod and the second connecting rod are blocked by the baffle, so that the movable plate pushes the battery cells in the U-shaped support plate. The pushing force of the movable plate can overcome the problem that the battery cells are stuck in the support plate due to friction or incorrect position, ensuring that all battery cells can slide out smoothly. At the same time, the movable plate can push the battery cells quickly and evenly, which is much faster than the battery cells sliding down by their own weight, thereby accelerating the pre-compression speed of the battery cells.

[0021] 3. This device is equipped with a feeding mechanism to vertically arrange the battery cells one by one in the storage barrel, and then push the battery cells into the pre-pressing mold in sequence. Whenever a battery cell is pre-pressed, the next battery cell can be quickly put in place, thereby reducing waiting time and idle period, realizing a continuous feeding process, and improving the efficiency of battery cell production.

[0022] 4. The device is provided with a pushing assembly, and the battery cells in multiple storage barrels are synchronously pushed into the pre-pressing mold by the first slide bar. Since the battery cells are pushed into the mold in a consistent manner, this automated process helps to ensure that each battery cell is subjected to the same pre-pressing treatment, thereby improving the consistency between batches, further reducing the opportunity for operators to directly contact the battery cells, and reducing the safety risks caused by improper operation.

[0023] 5. This device is provided with a linkage component, which can synchronously drive the U-shaped support plate to tilt and push the feeding mechanism away from the base during the upward movement of the pressure plate, so that the pre-pressed battery cells can be discharged from the discharge port, avoiding the accumulation of battery cells on the workbench surface affecting the subsequent battery cell pre-pressing work. At the same time, the feeding mechanism is aligned with the base during the descent of the pressure plate, which helps to ensure that the position of each battery cell is accurate when it is pushed into the pre-pressing mold, and can reduce the problem of uneven pre-pressing caused by improper position of the battery cell in the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a three-dimensional structural diagram of the present invention from a first viewing angle.

[0026] Figure 2 It is a three-dimensional structural diagram of the present invention from a second viewing angle.

[0027] Figure 3 It is a three-dimensional structural diagram of the material return mechanism in the present invention.

[0028] Figure 4 It is a three-dimensional structural diagram of the linkage assembly in the present invention.

[0029] Figure 5 It is a three-dimensional structural diagram of the auxiliary components in the present invention.

[0030] Figure 6 It is a three-dimensional structural diagram of the feeding mechanism in the present invention.

[0031] Figure 7For the present invention Figure 6 A magnified view of the structure at center.

[0032] Figure 8 It is a cross-sectional view of the positioning component in the present invention.

[0033] The numbers in the figure represent: 1, winding device; 2, unloading mechanism; 21, base; 22, receiving groove; 23, U-shaped support plate; 24, connecting rod; 25, cross bar; 26, pressing plate; 27, hydraulic cylinder; 28, guide rod; 29, bracket; 30, auxiliary component; 301, moving plate; 302, push rod; 303, mounting plate; 304, first connecting rod; 305, second connecting rod; 306, first spring; 40, linkage component; 401, baffle; 402, L-shaped connecting rod; 403, first slide groove; 404, insertion rod; 5 , feeding mechanism; 51, moving seat; 52, slide rail; 53, storage barrel; 54, funnel; 55, docking plate; 56, push-pull rod; 57, pushing assembly; 571, sleeve; 572, first slide bar; 573, limit block; 574, second slide bar; 575, second spring; 576, bump; 60, positioning assembly; 601, mounting seat; 602, telescopic plate; 603, slot; 604, inclined plane; 605, second slide slot; 606, third slide bar; 607, U-shaped handle; 608, third spring; 7, discharge port. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] The present invention will be further described below in conjunction with the embodiments.

[0036] See also Figures 1 to 8 A battery cell pre-pressing mechanism of this embodiment includes a winding device 1, a material unloading mechanism 2 for quickly removing the pre-pressed battery cell from the mold is arranged on the top of the winding device 1, and a loading mechanism 5 for quickly and safely placing the cylindrical battery cell into the mold is also arranged on one side of the top of the winding device 1, and a material unloading port 7 is opened on the winding device 1 between the material unloading mechanism 2 and the loading mechanism 5.

[0037] See also Figure 1 , Figure 2 , Figure 3 and Figure 4The unloading mechanism 2 includes a base 21 fixedly connected to the top of the winding device 1, a plurality of accommodating grooves 22 are provided on the top of the base 21, a U-shaped support plate 23 is arranged inside each accommodating groove 22, one end of each U-shaped support plate 23 is rotatably connected to the base 21 through a hinge, and the other end of each U-shaped support plate 23 is fixedly connected to a connecting rod 24, and a plurality of connecting rods 24 are fixedly connected through a cross bar 25, and an auxiliary component 30 for pushing the battery cell stuck in the U-shaped support plate 23 is arranged on the side of the connecting rod 24, and a linkage component 40 for mobilizing the rotation of the U-shaped support plate 23 is arranged between the cross bar 25 and the pressure plate 26.

[0038] The material unloading mechanism 2 also includes a bracket 29 fixedly connected to the top of the winding device 1. The bracket 29 is located directly above the base 21, and a hydraulic cylinder 27 is fixedly connected to the top of the bracket 29. A pressure plate 26 is fixedly connected to the output end of the hydraulic cylinder 27. A guide rod 28 is symmetrically fixedly connected to the top of the pressure plate 26. The guide rod 28 is slidably connected to the bracket 29.

[0039] During specific operation, the battery core is wound into a cylindrical shape by the winding machine and transported from the conveying equipment to the pre-pressing mechanism for pre-pressing operation. After the cylindrical battery core is placed inside the U-shaped pallet 23, the hydraulic cylinder 27 drives the pressure plate 26 to move downward to pre-press the cylindrical battery core inside the U-shaped pallet 23. During the movement of the pressure plate 26, the pressure plate 26 drives the guide rod 28 to move synchronously, and the guide rod 28 provides support for the movement of the pressure plate 26. After the pre-pressing is completed, the hydraulic cylinder 27 drives the pressure plate 26 to move upward.

[0040] See also Figure 4 and Figure 5 The linkage assembly 40 includes an L-shaped connecting rod 402 fixedly connected to the pressure plate 26, a first sliding groove 403 is provided in the vertical section of the L-shaped connecting rod 402, a plug rod 404 is slidably connected in the first sliding groove 403, one end of the plug rod 404 is fixedly connected to the cross bar 25, and a baffle 401 is also fixedly connected to the side of the bracket 29, and the baffle 401 is located directly above the connection between the first connecting rod 304 and the second connecting rod 305. The connection between the first connecting rod 304 and the second connecting rod 305 is bent upward.

[0041] During specific operation, when the hydraulic cylinder 27 drives the pressure plate 26 to move upward, the pressure plate 26 simultaneously drives the L-shaped connecting rod 402 to move upward. At this time, the insertion rod 404 first slides in the first slide groove 403. When the insertion rod 404 slides to the bottom of the first slide groove 403, the L-shaped connecting rod 402 can drive the cross bar 25 to move upward through the insertion rod 404. Since the cross bar 25 and the connecting rod 24 are fixedly connected, and the connecting rod 24 is fixedly connected to the U-shaped support plate 23, the upward-moving L-shaped connecting rod 402 drives the U-shaped support plate 23 to rotate on the base 21 through the insertion rod 404, the cross bar 25 and the connecting rod 24.

[0042] When the pressure plate 26 is driven by the hydraulic cylinder 27 to move downward, the pressure plate 26 first drives the L-shaped connecting rod 402 to move downward synchronously, and the L-shaped connecting rod 402 drives the U-shaped support plate 23 to rotate under the base 21 through the insertion rod 404, the cross rod 25 and the connecting rod 24, so that the U-shaped support plate 23 rotates back to the receiving groove 22 of the base 21.

[0043] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The auxiliary component 30 includes a push rod 302 that slides horizontally through the U-shaped support plate 23, one end of the push rod 302 is fixedly connected to a movable plate 301, and the movable plate 301 is located inside the U-shaped support plate 23, the other end of the push rod 302 is fixedly connected to a mounting plate 303, a first spring 306 is sleeved on the outside of the push rod 302, and the first spring 306 is located outside the U-shaped support plate 23, and the mounting plate 303 is rotatably connected to a first connecting rod 304 at one end away from the push rod 302, and the first connecting rod 304 is rotatably connected to a second connecting rod 305 at one end away from the mounting plate 303, and the second connecting rod 305 is rotatably connected to the side of the connecting rod 24 at one end away from the first connecting rod 304.

[0044] During specific operation, during the rotation of the U-shaped support plate 23, the first connecting rod 304 and the second connecting rod 305 move upward together. When the connection between the first connecting rod 304 and the second connecting rod 305 conflicts with the baffle 401, at this time, the connection between the first connecting rod 304 and the second connecting rod 305 rotates downward. Since one end of the second connecting rod 305 is restricted by the connecting rod 24, the first connecting rod 304 can only push the push rod 302 to move. When the push rod 302 moves, it drives the movable plate 301 to move synchronously. The moving movable plate 301 pushes the battery cells in the U-shaped support plate 23, thereby pushing the battery cells out of the inclined U-shaped support plate 23 to ensure that all battery cells can slide out smoothly. At the same time, the movable plate 301 can quickly and evenly push the battery cells, which is much faster than the battery cells sliding down by their own weight, thereby accelerating the pre-compression speed of the battery cells. The sliding battery cells fall into the collection container from the discharge port 7, reducing the chance of direct contact with the battery cells by hand, thereby reducing the risk of damaging the battery cells due to improper human operation.

[0045] See also Figure 1 , Figure 2 and Figure 6 The feeding mechanism 5 includes a slide rail 52 fixedly connected to the top of the winding device 1, a movable seat 51 is slidably connected to the top of the slide rail 52, a storage barrel 53 is fixedly connected to the top of the movable seat 51, a push-pull rod 56 is rotatably connected to the side of the movable seat 51, and the push-pull rod 56 is rotatably connected to the side of the connecting rod 24 at one end away from the movable seat 51.

[0046] A U-shaped docking plate 55 is fixedly connected to the side of each storage barrel 53 close to the base 21, and a through hole for the battery cell to pass through is provided between the docking plate 55 and the storage barrel 53. A funnel 54 is fixedly connected to the top of the storage barrel 53. A pushing assembly 57 for pushing the battery cell out of the storage barrel 53 is provided on the side of each storage barrel 53 away from the docking plate 55. The wound battery cells are put into the storage barrel 53 one by one from the funnel 54, and the battery cells are arranged vertically in the storage barrel 53.

[0047] During specific operation, when the L-shaped connecting rod 402 drives the U-shaped support plate 23 to rotate on the base 21 through the insertion rod 404, the cross rod 25 and the connecting rod 24, since the two ends of the push-pull rod 56 are respectively rotatably connected with the connecting rod 24 and the movable seat 51, the connecting rod 24 pushes the movable seat 51 away from the base 21 through the push-pull rod 56 during the upward rotation process. At this time, there is no obstruction of the loading mechanism 5 above the discharge port 7, and the pre-pressed battery cell can fall from the discharge port 7 into the collection device. The movable seat 51 synchronously drives the pushing component 57 to move during the process of moving away from the base 21.

[0048] During the process of the U-shaped support plate 23 rotating back to the accommodating groove 22 of the base 21, the U-shaped support plate 23 drives the push-pull rod 56 to rotate through the connecting rod 24. During the rotation, the push-pull rod 56 can pull the movable seat 51 to move toward the direction close to the base 21. At this time, the docking plate 55 on the side of the movable seat 51 can be aligned with the U-shaped support plate 23.

[0049] See also Figure 6 and Figure 7 The pushing assembly 57 includes a sleeve 571 fixedly connected to the side of the storage barrel 53 away from the docking plate 55, and the sleeve 571 is connected to the storage barrel 53. The first slide bar 572 is horizontally slidably connected inside the sleeve 571. The first slide bar 572 is fixedly connected to the limit block 573 outside, and the limit block 573 is located outside the sleeve 571. One end of the first slide bar 572 is fixedly connected to the second slide bar 574. The second slide bar 574 is slidably sleeved with a protrusion 576 at one end away from the first slide bar 572. The protrusion 576 is fixedly connected to the winding device 1, and the second spring 575 is also sleeved outside the second slide bar 574. The inner diameter of the sleeve 571 is larger than the diameter of the battery cell to be pre-pressed, and the diameter of the first slide bar 572 is consistent with the inner diameter of the sleeve 571.

[0050] During specific operation, when the mobile seat 51 is moving away from the base 21, the first slide bar 572 and the second slide bar 574 move synchronously in the direction close to the positioning assembly 60, and the first slide bar 572 and the protrusion 576 squeeze and store force on the second spring 575 outside the second slide bar 574 until the first slide bar 572 is fixed in position by the positioning assembly 60, and then the hydraulic cylinder 27 drives the pressure plate 26 to descend. At this time, the mobile seat 51 moves in the direction close to the base 21. Since the first slide bar 572 is fixed in position by the positioning assembly 60, the first slide bar 572 moves from the storage barrel 53 to the side of the sleeve 571. When the first slide bar 572 is completely detached from the storage barrel 53, the battery cells in the storage barrel 53 continue to fall to the bottom of the storage barrel 53. After that, the fixing of the first slide bar 572 by the positioning assembly 60 is released, and the first slide bar 572 is pushed to move in the direction close to the base 21 under the elastic force of the second spring 575. During the movement of the first slide bar 572, the first slide bar 572 first moves from the sleeve 571 into the storage barrel 53, and the first slide bar 572 pushes the battery cells at the bottom of the storage barrel 53 into the docking plate 55. After that, the first slide bar 572 continues to pass through the storage barrel 53 to reach the docking plate 55. At this time, the first slide bar 572 pushes the battery cells in the docking plate 55 into the U-shaped support plate 23. Moreover, since the first slide bar 572 is externally fixedly connected to the limiting block 573, the first slide bar 572 will not move to the U-shaped support plate 23, and finally the pressing plate 26 descends to pre-press the battery cells. The battery cells in the multiple storage barrels 53 are synchronously pushed into the pre-pressing mold by the first slide bar 572. Since the battery cells are pushed into the mold in a consistent manner, this automated process helps to ensure that each battery cell receives the same pre-pressing treatment, thereby improving consistency between batches.

[0051] See also Figure 6 , Figure 7 and Figure 8 The feeding mechanism 5 also includes a positioning assembly 60, which includes a mounting seat 601 fixedly connected to the top of the winding device 1, a telescopic plate 602 is slidably connected in the cavity at the top of the mounting seat 601, and a plurality of third springs 608 are fixedly connected to the bottom of the telescopic plate 602. The third springs 608 are located inside the cavity of the mounting seat 601, a slot 603 is provided on the side of the first slide bar 572, and the slot 603 is adapted to the top of the telescopic plate 602, and an inclined surface 604 is also provided on the end of the first slide bar 572 close to the telescopic plate 602.

[0052] The positioning assembly 60 also includes second sliding grooves 605 opened on both sides of the mounting seat 601, and each second sliding groove 605 is slidably connected to a third sliding rod 606, one end of the third sliding rod 606 is fixedly connected to the side of the telescopic plate 602, and the ends of the two third sliding rods 606 away from the telescopic plate 602 are fixedly connected to the U-shaped handle 607.

[0053] During specific operation, when the first slide bar 572 and the second slide bar 574 move synchronously toward the direction approaching the positioning assembly 60, the inclined surface 604 of the first slide bar 572 first contacts the top of the telescopic plate 602. When the first slide bar 572 continues to move, the first slide bar 572 pushes the telescopic plate 602 toward the inside of the cavity of the mounting seat 601 through the inclined surface 604. At the same time, the telescopic plate 602 compresses and accumulates force on the third spring 608 until the telescopic plate 602 moves into the slot 603. Pushed by the elastic force of the third spring 608, the top of the telescopic plate 602 is uniformly stuck in the slot 603, thereby fixing the position of the first slide bar 572.

[0054] When the movable seat 51 moves toward the direction close to the base 21 and the battery cells in the storage barrel 53 continue to fall to the bottom of the storage barrel 53, the U-shaped handle 607 is manually pressed, and the U-shaped handle 607 drives the telescopic plate 602 to continue to move toward the bottom of the cavity of the mounting seat 601 through the third slide bar 606. At this time, the top of the telescopic plate 602 is disengaged from the slot 603, and the telescopic plate 602 releases the fixing effect on the first slide bar 572. Under the push of the elastic force of the second spring 575, the first slide bar 572 pushes the battery cells to move to the U-shaped support plate 23.

[0055] Working principle:

[0056] The cylindrical battery cell wound by the winding machine is put into the feeding mechanism 5, and the U-shaped handle 607 is manually pressed to release the fixing effect of the positioning component 60 on the pushing component 57, and then the pushing component 57 pushes the battery cell in the feeding mechanism 5 into the U-shaped support plate 23. Then, the hydraulic cylinder 27 drives the pressing plate 26 to descend to pre-press the battery cell in the U-shaped support plate 23. After pre-pressing, the hydraulic cylinder 27 drives the pressing plate 26 to rise, and the pressing plate 26 first drives the U-shaped support plate 23 to rotate upward through the linkage component 40. During the rotation of the U-shaped support plate 23, the pre-pressed battery cell in the U-shaped support plate 23 is pushed to slide down through the auxiliary component 30. While the U-shaped support plate 23 rotates upward, it drives the feeding mechanism 5 to move away from the base 21, so that The loading mechanism 5 will not block the discharge port 7, and the fallen battery cells enter the collecting device from the discharge port 7. While the loading mechanism 5 is away from the base 21, the loading mechanism 5 drives the pushing component 57 to move synchronously until the pushing component 57 is fixed in position by the positioning component 60. Finally, the hydraulic cylinder 27 drives the pressure plate 26 to descend again. During the descent of the pressure plate 26, the U-shaped support plate 23 is reset and rotated to the accommodating groove 22 of the base 21. During this process, the U-shaped support plate 23 drives the loading mechanism 5 to approach the base 21 again, and then the U-shaped handle 607 is manually pressed again to release the fixing effect of the positioning component 60 on the pushing component 57. Then the pushing component 57 pushes the battery cells in the loading mechanism 5 into the U-shaped support plate 23.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cell preloading mechanism, characterized in that: The invention comprises a winding device (1), wherein a material unloading mechanism (2) for quickly removing a pre-pressed battery cell from a mold is arranged on the top of the winding device (1), a material loading mechanism (5) for quickly and safely placing a cylindrical battery cell into the mold is also arranged on one side of the top of the winding device (1), and a material unloading port (7) is provided on the winding device (1) between the material unloading mechanism (2) and the material loading mechanism (5); The material unloading mechanism (2) comprises a base (21) fixedly connected to the top of the winding device (1), a plurality of receiving grooves (22) are provided on the top of the base (21), a U-shaped support plate (23) is arranged inside each receiving groove (22), one end of each U-shaped support plate (23) is rotatably connected to the base (21) via a hinge, the other end of each U-shaped support plate (23) is fixedly connected to a connecting rod (24), a plurality of connecting rods (24) are fixedly connected to each other via a cross rod (25), an auxiliary component (30) for pushing the battery cell stuck in the U-shaped support plate (23) is arranged on the side of the connecting rod (24), and a linkage component (40) for mobilizing the rotation of the U-shaped support plate (23) is arranged between the cross rod (25) and the pressure plate (26).

2. The battery cell pre-stressing mechanism according to claim 1, characterized in that: The material unloading mechanism (2) also includes a bracket (29) fixedly connected to the top of the winding device (1), the bracket (29) is located directly above the base (21), and a hydraulic cylinder (27) is fixedly connected to the top of the bracket (29), a pressure plate (26) is fixedly connected to the output end of the hydraulic cylinder (27), and a guide rod (28) is symmetrically fixedly connected to the top of the pressure plate (26), and the guide rod (28) is slidably connected to the bracket (29).

3. The battery cell pre-stressing mechanism according to claim 1, characterized in that: The auxiliary component (30) comprises a push rod (302) which slides horizontally through the U-shaped support plate (23); one end of the push rod (302) is fixedly connected to a movable plate (301), and the movable plate (301) is located inside the U-shaped support plate (23); the other end of the push rod (302) is fixedly connected to a mounting plate (303); a first spring (306) is sleeved on the outside of the push rod (302), and the first spring (306) is located outside the U-shaped support plate (23); an end of the mounting plate (303) away from the push rod (302) is rotatably connected to a first connecting rod (304); an end of the first connecting rod (304) away from the mounting plate (303) is rotatably connected to a second connecting rod (305); and an end of the second connecting rod (305) away from the first connecting rod (304) is rotatably connected to a side surface of the connecting rod (24).

4. The battery cell pre-stressing mechanism according to claim 2, characterized in that: The linkage assembly (40) includes an L-shaped connecting rod (402) fixedly connected to the pressure plate (26), the vertical section of the L-shaped connecting rod (402) is provided with a first sliding groove (403), an insertion rod (404) is slidably connected in the first sliding groove (403), one end of the insertion rod (404) is fixedly connected to the cross bar (25), and a baffle (401) is also fixedly connected to the side of the bracket (29), and the baffle (401) is located directly above the connection between the first connecting rod (304) and the second connecting rod (305).

5. The battery cell pre-stressing mechanism according to claim 1, characterized in that: The feeding mechanism (5) comprises a slide rail (52) fixedly connected to the top of the winding device (1); the top of the slide rail (52) is slidably connected to a movable seat (51); the top of the movable seat (51) is fixedly connected to a storage barrel (53); the side of the movable seat (51) is rotatably connected to a push-pull rod (56); the end of the push-pull rod (56) away from the movable seat (51) is rotatably connected to the side of the connecting rod (24).

6. The battery cell pre-stressing mechanism according to claim 5, characterized in that: A U-shaped docking plate (55) is fixedly connected to the side of each storage barrel (53) close to the base (21), and a through hole for the battery cell to pass through is provided between the docking plate (55) and the storage barrel (53). A funnel (54) is fixedly connected to the top of the storage barrel (53), and a pushing component (57) for pushing the battery cell out of the storage barrel (53) is provided on the side of each storage barrel (53) away from the docking plate (55).

7. The battery cell pre-stressing mechanism according to claim 6, characterized in that: The pushing assembly (57) includes a sleeve (571) fixedly connected to the side of the storage barrel (53) away from the docking plate (55), and the sleeve (571) and the storage barrel (53) are communicated with each other, the sleeve (571) is horizontally slidably connected to a first slide bar (572) inside, the first slide bar (572) is fixedly connected to a limit block (573) outside, and the limit block (573) is located outside the sleeve (571), one end of the first slide bar (572) is fixedly connected to a second slide bar (574), the second slide bar (574) is slidably sleeved with a protrusion (576) at one end away from the first slide bar (572), the protrusion (576) is fixedly connected to the winding device (1), and the second slide bar (574) is also sleeved with a second spring (575) outside.

8. The battery cell pre-stressing mechanism according to claim 7, characterized in that: The feeding mechanism (5) also includes a positioning component (60), the positioning component (60) includes a mounting seat (601) fixedly connected to the top of the winding device (1), a telescopic plate (602) is slidably connected in the cavity at the top of the mounting seat (601), a plurality of third springs (608) are fixedly connected to the bottom of the telescopic plate (602), the third springs (608) are located inside the cavity of the mounting seat (601), a slot (603) is provided on the side of the first slide bar (572), and the slot (603) is adapted to the top of the telescopic plate (602), and a slope (604) is also provided on one end of the first slide bar (572) close to the telescopic plate (602).

9. The battery cell pre-stressing mechanism according to claim 8, characterized in that: The positioning assembly (60) also includes second sliding grooves (605) opened on both sides of the mounting seat (601), and each second sliding groove (605) is slidably connected to a third sliding rod (606), one end of the third sliding rod (606) is fixedly connected to the side of the telescopic plate (602), and the ends of the two third sliding rods (606) away from the telescopic plate (602) are fixedly connected to the U-shaped handle (607).

10. A battery core winding machine, characterized in that: It comprises a battery cell pre-pressing mechanism as claimed in any one of claims 1 to 9.

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