Winding roller assembly of lithium ion battery diaphragm coating machine

Abstract

The invention discloses a winding roller assembly of a lithium ion battery diaphragm coating machine. The winding roller assembly comprises a supporting plate, a driving gear, a rotating disc and a plurality of winding roller bodies. The driving gear is rotationally mounted on one side of the supporting plate; the rotating disc is rotationally mounted on the supporting plate through a driving part; the multiple winding roller bodies are annularly arranged on the rotating disc at equal intervals. One end of the winding roller body penetrates through the rotating disc and is provided with a driven gear meshed with the driving gear; wherein the wind-up roller body is rotationally connected with the rotating disc through a bearing; and when the rotating disc rotates, the multiple winding roller bodies are alternately meshed with the driving gear. The invention relates to the technical field of diaphragm winding, and through the arrangement, a plurality of winding roller bodies can be alternately wound under the action of the rotating disc, the driving gear and the driven gear, so that the waiting time required by disassembly and assembly of the winding roller bodies can be effectively saved, and the purpose of improving the diaphragm winding speed is achieved.

Description

Technical Field

[0001] The invention belongs to the field of lithium batteries and relates to a diaphragm winding technology, in particular to a winding roller assembly of a lithium-ion battery diaphragm coating machine. Background Art

[0002] Lithium-ion batteries are widely used due to their high energy density, no memory effect, long cycle life, and environmental friendliness. In the structure of lithium batteries, the diaphragm is one of the key internal components. The performance of the diaphragm determines the interface structure and internal resistance of the battery, and directly affects the battery's capacity, cycle, and safety performance. During the production of the diaphragm, in order to prevent the diaphragm from being damaged, a winding device is required to carry out the winding operation so that the diaphragm can be preserved.

[0003] In the prior art, after the membrane is rolled up, the machine usually needs to be stopped, and the membrane wrapped around the winding roller assembly is disassembled to remove it, and then the winding roller is installed, and finally the equipment is started for subsequent winding operations. In this process, the disassembly and assembly of the membrane takes a lot of time, which is not conducive to improving the production rate.

[0004] Therefore, a lithium-ion battery separator coating machine winding roller assembly is needed to solve the above problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a winding roller assembly for a lithium-ion battery diaphragm coating machine to shorten the downtime waiting time, thereby increasing the diaphragm winding rate, and further increasing the overall production rate. The present invention sets up multiple winding roller bodies and a rotating disk, and when the rotating disk rotates, the multiple winding roller bodies can all mesh with the driving gear to ensure the normal operation of the winding function. Therefore, when one of the winding roller bodies completes the winding, the rotating disk can be driven to rotate to complete the alternating operation of the winding roller body, thereby effectively saving the waiting time required for the disassembly and assembly of the winding roller body, and achieving the purpose of increasing the diaphragm winding rate.

[0006] To achieve the above-mentioned object, a first aspect of the present invention provides a winding roller assembly for a lithium-ion battery separator coating machine, comprising a support plate, a driving gear, a rotating disk, and a plurality of winding roller bodies;

[0007] The driving gear is rotatably mounted on one side of the support plate;

[0008] The rotating disk is rotatably mounted on the supporting plate through a driving member;

[0009] The plurality of winding roller bodies are arranged in an annular shape and at equal intervals on the rotating disk;

[0010] One end of the winding roller body passes through the rotating disk and has a driven gear meshing with the driving gear;

[0011] Wherein, the winding roller body and the rotating disk are rotatably connected via a bearing;

[0012] When the rotating disk rotates, the plurality of winding roller bodies are alternately meshed with the driving gear.

[0013] Furthermore, the interior of the winding roller body is arranged to be hollow, and the outer wall of the middle portion is arranged in an annular shape with a plurality of notches;

[0014] The interior of the winding roller body is provided with a protrusion mechanism which can be exposed to the outside through the notch or hidden inside the notch, and is used for carrying the diaphragm or facilitating the taking of the diaphragm.

[0015] Furthermore, when the protrusion mechanism is exposed to the outside of the notch, it is used to support the membrane when it is rolled up;

[0016] When the protruding mechanism is hidden inside the notch, a gap is formed between the wound diaphragm and the winding roller body, which facilitates the separation of the diaphragm from the winding roller body.

[0017] Furthermore, the protrusion mechanism includes a screw rod with symmetrical and opposite threads on the outer wall, a protrusion block and two sliding seats;

[0018] The screw rod is rotatably mounted inside the winding roller body;

[0019] The protruding block is slidably installed in the notch;

[0020] The two sliding seats are both threadedly connected to the screw rod, and when the screw rod rotates, the two sliding seats move in opposite directions;

[0021] The two sliding seats are both hinged with connecting rods, and the two connecting rods are symmetrically and tiltedly arranged, and the other ends of the connecting rods are hinged with the protruding blocks.

[0022] Furthermore, the protrusion mechanism includes an airbag sleeve and a piston push rod;

[0023] The airbag sleeve is arranged inside the winding roller body, and the outer wall has a plurality of airbag protrusions corresponding to the notches;

[0024] The piston push rod is slidably connected to one end of the winding roller body away from the driven gear, and one end extends into the inside of the airbag sleeve to surround the airbag sleeve to form an airbag chamber filled with gas;

[0025] When the piston push rod moves, the airbag protrusion is controlled to be exposed outside the slot or hidden inside the slot under the action of air pressure.

[0026] Furthermore, the piston push rod is connected to the winding roller body through a threaded connection, so that the piston push rod can be rotated and fed and remain self-locking.

[0027] Furthermore, a limiting plate is provided on the support plate for abutting against one end of the piston push rod;

[0028] When the driven gear of the winding roller body rotates along with the rotating disk to mesh with the driving gear, the piston push rod can gradually move along the inner direction of the airbag sleeve under the squeezing action of the limiting plate;

[0029] A compression spring is provided between the piston push rod and the winding roller body;

[0030] When the driven gear of the winding roller body rotates along with the rotating disk until it is separated from the driving gear, the piston push rod moves in a direction away from the winding roller body under the action of the compression spring and the limiting plate.

[0031] Furthermore, the limiting plate is configured as a C-shaped ring structure, and the cross section is a wedge-shaped structure with a decreasing diameter from top to bottom.

[0032] Furthermore, a hemispherical ball is provided at one end of the piston push rod that abuts against the limit plate.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] By setting up multiple winding roller bodies and rotating disks, and making the rotating disks rotate, the multiple winding roller bodies can mesh with the driving gear to ensure the normal operation of the winding function. Therefore, when one of the winding roller bodies completes the winding, the rotating disk can be driven to rotate to complete the alternating operation of the winding roller bodies, thereby effectively saving the waiting time required for disassembly and assembly of the winding roller bodies, thereby achieving the purpose of increasing the winding rate of the diaphragm.

[0035] Furthermore, by providing a protrusion mechanism, when the wound diaphragm is detached from the rotating disk to the winding station, it can shrink to form a cavity between the diaphragm and the winding roller body that is easy to take, thereby achieving the purpose of quickly separating the diaphragm from the winding roller body.

[0036] Furthermore, by setting a protruding mechanism including an airbag sleeve and a piston push rod and a limit plate, when the winding roller body rotates to a specific position (i.e., the winding station), the airbag protrusion of the airbag sleeve can directly expose the outside of the slot to support the diaphragm; and when the winding roller body rotates to leave the winding station, the airbag protrusion of the airbag sleeve can shrink autonomously to separate the diaphragm from the outer wall of the winding roller body 4, i.e., no manual operation is required in the process, thereby achieving the purpose of easy use and a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 these drawings without paying creative work.

[0038] Figure 1 A side cross-sectional view of a winding roller assembly of a lithium-ion battery separator coating machine in one embodiment of the present invention;

[0039] Figure 2 It is a front view of a winding roller assembly of a lithium-ion battery separator coating machine in one embodiment of the present invention;

[0040] Figure 3 A side cross-sectional view of a winding roller assembly of a lithium-ion battery separator coating machine in one embodiment of the present invention;

[0041] Figure 4 A side cross-sectional view of a winding roller assembly of a lithium-ion battery separator coating machine in one embodiment of the present invention;

[0042] Figure 5 It is a schematic structural diagram of a limit plate of a winding roller assembly of a lithium-ion battery diaphragm coating machine in one embodiment of the present invention.

[0043] Figure Number:

[0044] 1. Support plate; 2. Driving gear; 3. Rotating disk; 4. Winding roller body; 41. Driven gear; 42. Notch; 5. Protruding mechanism; 51. Screw rod; 52. Protruding block; 53. Sliding seat; 54. Airbag sleeve; 55. Piston push rod; 551. Hemispherical ball; 6. Limiting plate; 7. Compression spring. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Embodiment 1

[0047] See also Figure 1 and Figure 2 In a first aspect, an embodiment of the present invention provides a winding roller assembly for a lithium-ion battery separator coating machine, comprising a support plate 1, a driving gear 2, a rotating disk 3 and a plurality of winding roller bodies 4.

[0048] The driving gear 2 is rotatably mounted on one side of the support plate 1 and is used to control the rotation of the winding roller body 4 to complete the winding function.

[0049] Specifically, the driving gear 2 is driven by the motor, so that when the winding roller body 4 is meshed with the driving gear 2, power transmission is completed under the meshing action.

[0050] The rotating disk 3 is rotatably mounted on the supporting plate 1 through a driving member.

[0051] Among them, multiple winding roller bodies 4 are arranged in a ring shape and equidistantly on the rotating disk 3 for alternating action, that is, when one of the winding roller bodies 4 completes winding, the rotating disk 3 rotates to rotate the other winding roller body 4 to the winding station, thereby saving the waiting time required for disassembly and assembly of the winding roller body 4 and improving the production rate.

[0052] It should be noted that, in the present embodiment, the driving member is configured as a stepping motor, and the stepping motor is used to control the rotating disk 3 to rotate a predetermined angle once, so as to better realize the alternating switching between the winding roller bodies 4 .

[0053] It should also be noted that one end of the winding roller body 4 passes through the rotating disk 3 and has a driven gear 41 meshing with the driving gear 2, that is, the rotation of the driven gear 41 is controlled by the driving gear 2, thereby realizing the normal winding function of the winding roller body 4.

[0054] Among them, the winding roller body 4 and the rotating disk 3 are rotatably connected through a bearing, so that when the rotating disk 3 rotates to drive the driven gear 41 of the winding roller body 4 to engage with the driving gear 2, the winding roller body 4 can rotate on its own and ensure the subsequent winding function, that is, to ensure that the driven gear 41 and the driving gear 2 will not collide with each other or get stuck.

[0055] Therefore, through the above arrangement, when the rotating disk 3 rotates, the plurality of winding roller bodies 4 are alternately meshed with the driving gear 2, so that the winding roller bodies 4 can quickly take over the operation after winding is completed, thereby improving the winding rate.

[0056] The device is provided with a plurality of winding roller bodies 4 and a rotating disk 3, and when the rotating disk 3 rotates, the plurality of winding roller bodies 4 can mesh with the driving gear 2 to ensure the normal operation of the winding function. Therefore, when one of the winding roller bodies 4 completes the winding, the rotating disk 3 can be driven to rotate to complete the alternating operation of the winding roller bodies 4, thereby effectively saving the waiting time required for the disassembly and assembly of the winding roller bodies 4, thereby achieving the purpose of increasing the winding rate of the diaphragm.

[0057] Embodiment 2

[0058] In this embodiment, a protrusion mechanism 5 is further provided to facilitate the subsequent rapid separation of the diaphragm from the winding roller body 4 .

[0059] Specifically, the interior of the winding roller body 4 is configured to be hollow, and a plurality of notches 42 are provided in an annular shape on the outer wall of the middle portion.

[0060] The winding roller body 4 is provided with a protruding mechanism 5 which can be exposed to the outside through the notch 42 or hidden inside the notch 42 and is used for carrying the diaphragm or facilitating the taking of the diaphragm.

[0061] Specifically, when the protrusion mechanism 5 is exposed to the outside of the notch 42, it is used to support the membrane when it is rolled up.

[0062] When the protruding mechanism 5 is hidden inside the notch 42 , a gap is formed between the wound diaphragm and the winding roller body 4 , so that the diaphragm and the winding roller body 4 are easily separated.

[0063] In one example, the protrusion mechanism 5 includes a screw rod 51 with symmetrical and opposite threads on the outer wall, a protrusion block 52 and two sliding seats 53 .

[0064] The screw rod 51 is rotatably mounted inside the winding roller body 4 .

[0065] The protruding block 52 is slidably installed in the notch 42 , and the two sliding seats 53 are both threadedly connected to the screw rod 51 , and when the screw rod 51 rotates, the two sliding seats 53 move in opposite directions.

[0066] The two sliding seats 53 are both hinged with connecting rods, and the two connecting rods are symmetrically and tiltedly arranged, and the other ends of the connecting rods are hinged to the protruding blocks 52 .

[0067] That is, when it is necessary to control the protrusion block 52 to be exposed to the outside of the slot 42 to support the diaphragm, by controlling the screw rod 51 to rotate forward (such as controlled by a motor), the two sliding seats 53 can be moved in a direction approaching each other to push the protrusion block 52 out of the slot 42. When the diaphragm needs to be removed from the winding roller body 4, the screw rod 51 is controlled to rotate in the opposite direction, so that the two sliding seats 53 move in a direction away from each other to pull the protrusion block 52 to shrink into the slot 42, forming a cavity for separating the diaphragm from the winding roller body 4.

[0068] like Figure 3 As shown, in another example, the protrusion mechanism 5 includes an airbag sleeve 54 and a piston push rod 55 .

[0069] The airbag sleeve 54 is disposed inside the winding roller body 4, and the outer wall has a plurality of airbag protrusions corresponding to the notch 42. That is, the air pressure inside the airbag sleeve 54 changes, so that the airbag protrusions protrude outside the notch 42 or are hidden inside the notch 42, so as to correspond to the bearing diaphragm or be used for the detachment of the diaphragm.

[0070] Specifically, the piston push rod 55 is slidably connected to one end of the winding roller body 4 away from the driven gear 41 , and one end extends into the airbag sleeve 54 to surround the airbag sleeve 54 to form an airbag chamber filled with gas.

[0071] Therefore, when the piston push rod 55 moves, the airbag protrusion is controlled to be exposed to the outside of the notch 42 or hidden in the notch 42 under the action of air pressure.

[0072] In this embodiment, a protrusion mechanism 5 is provided so that when the wound diaphragm is detached from the rotating disk 3 to the winding station, it can shrink to form a cavity between the diaphragm and the winding roller body 4 for easy picking, thereby achieving the purpose of quickly separating the diaphragm from the winding roller body 4.

[0073] In this embodiment, in order to ensure that the piston push rod 55 remains relatively fixed after moving to a specified position, it is avoided that the airbag bulge cannot be maintained for a long time due to the movement of the piston push rod 55.

[0074] Specifically, the piston push rod 55 is connected to the winding roller body 4 through a threaded connection, so that the piston push rod 55 can be rotated and fed and remain self-locking.

[0075] Embodiment 3

[0076] like Figure 4 and Figure 5As shown, the difference between this embodiment and the second embodiment is that there is no need to manually lock the piston push rod 55. The function of autonomous movement control of the piston push rod 55 can be achieved by simply adding a limit plate 6 and a compression spring 7, thereby eliminating the need for manual cooperation, reducing labor intensity and improving the degree of automation.

[0077] Specifically, a limiting plate 6 is provided on the support plate 1 for abutting against one end of the piston push rod 55 .

[0078] When the driven gear 41 of the winding roller body 4 rotates along with the rotating disk 3 to mesh with the driving gear 2, the piston push rod 55 can gradually move along the inner direction of the airbag sleeve 54 under the squeezing action of the limiting plate 6;

[0079] In addition, a compression spring 7 is provided between the piston push rod 55 and the winding roller body 4 .

[0080] When the driven gear 41 of the winding roller body 4 rotates along with the rotating disk 3 to be separated from the driving gear 2 , the piston push rod 55 moves in a direction away from the winding roller body 4 under the action of the compression spring 7 and the limit plate 6 .

[0081] Among them, Figure 5 As shown, the limiting plate 6 is configured as a C-shaped ring structure, and the cross section is a wedge-shaped structure with a decreasing diameter from top to bottom.

[0082] It should be noted that the annular trajectory of the limit plate 6 shares an axis with the rotating disk 3, so that when the winding roller body 4 rotates following the rotating disk 3, the piston push rod 55 is always in contact with the end face of the limit plate 6 to achieve a change in the relative position between itself and the airbag sleeve 54, thereby completing the exposure or contraction function of the airbag protrusion.

[0083] In this embodiment, a protruding mechanism 5 including an airbag sleeve 54 and a piston push rod 55 and a limit plate 6 are arranged, so that when the winding roller body 4 rotates to a specific position (i.e., the winding station), the airbag protrusion of the airbag sleeve 54 can directly expose the outside of the slot 42 to support the diaphragm, and when the winding roller body 4 rotates to leave the winding station, the piston push rod 55 is reset under the action of the compression spring 7 until it is separated from the limit plate 6, so that the airbag protrusion of the airbag sleeve 54 can shrink autonomously to separate the diaphragm from the outer wall of the winding roller body 4, that is, no manual operation is required in this process, thereby achieving the purpose of convenient use and high degree of automation.

[0084] In order to ensure that the abutment between the limit plate 6 and the piston push rod 55 will not interfere with the rotation and winding of the winding roller body 4, a hemispherical ball 551 is provided at the end where the piston push rod 55 abuts against the limit plate 6 to reduce the rotational resistance between the two around the moving direction of the piston push rod 55 to ensure that there will be no jamming or the like.

[0085] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A winding roller assembly for a lithium-ion battery separator coating machine, characterized in that: It comprises a support plate (1), a driving gear (2), a rotating disk (3) and a plurality of winding roller bodies (4); The driving gear (2) is rotatably mounted on one side of the support plate (1); The rotating disk (3) is rotatably mounted on the supporting plate (1) via a driving member; The plurality of winding roller bodies (4) are arranged in an annular shape and at equal intervals on the rotating disk (3); One end of the winding roller body (4) passes through the rotating disk (3) and has a driven gear (41) meshing with the driving gear (2); Wherein, the winding roller body (4) and the rotating disk (3) are rotatably connected via a bearing; When the rotating disk (3) rotates, the plurality of winding roller bodies (4) are alternately meshed with the driving gear (2).

2. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 1, characterized in that: The interior of the winding roller body (4) is arranged to be hollow, and a plurality of notches (42) are arranged in an annular shape on the outer wall of the middle portion; The interior of the winding roller body (4) is provided with a protruding mechanism (5) which can be exposed to the outside through the notch (42) or hidden inside the notch (42) and is used for supporting the diaphragm or facilitating the removal of the diaphragm.

3. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 2, characterized in that: When the protruding mechanism (5) is exposed to the outside of the notch (42), it is used to support the membrane when it is rolled up; When the protruding mechanism (5) is hidden inside the notch (42), a gap is formed between the wound diaphragm and the winding roller body (4), thereby facilitating the separation of the diaphragm from the winding roller body (4).

4. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 3, characterized in that: The protrusion mechanism (5) comprises a screw rod (51) with symmetrical and opposite threads on the outer wall, a protrusion block (52) and two sliding seats (53); The screw rod (51) is rotatably mounted inside the winding roller body (4); The protruding block (52) is slidably mounted in the notch (42); The two sliding seats (53) are both threadedly connected to the screw rod (51), and when the screw rod (51) rotates, the two sliding seats (53) move in opposite directions; The two sliding seats (53) are both hinged with a connecting rod, and the two connecting rods are symmetrically and tiltedly arranged, and the other end of the connecting rod is hinged to the protruding block (52).

5. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 3, characterized in that: The protrusion mechanism (5) comprises an air bag sleeve (54) and a piston push rod (55); The airbag sleeve (54) is arranged inside the winding roller body (4), and the outer wall has a plurality of airbag protrusions corresponding to the notches (42); The piston push rod (55) is slidably connected to one end of the winding roller body (4) away from the driven gear (41), and one end extends into the interior of the airbag sleeve (54) to surround the airbag sleeve (54) to form an airbag chamber filled with gas; When the piston push rod (55) moves, the airbag protrusion is controlled to be exposed to the outside of the slot (42) or hidden in the slot (42) under the action of air pressure.

6. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 5, characterized in that: The piston push rod (55) is connected to the winding roller body (4) via a threaded connection, so that the piston push rod (55) can be rotated and fed and remain self-locking.

7. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 5, characterized in that: The support plate (1) is provided with a limit plate (6) for abutting against one end of the piston push rod (55); When the driven gear (41) of the winding roller body (4) rotates along with the rotating disk (3) to mesh with the driving gear (2), the piston push rod (55) can gradually move along the inner direction of the airbag sleeve (54) under the squeezing action of the limiting plate (6); A compression spring (7) is provided between the piston push rod (55) and the winding roller body (4); When the driven gear (41) of the winding roller body (4) rotates along with the rotating disk (3) until it is separated from the driving gear (2), under the action of the compression spring (7) and the limit plate (6), the piston push rod (55) moves in a direction away from the winding roller body (4).

8. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 7, characterized in that: The limiting plate (6) is configured as a C-shaped annular structure, and the cross section is a wedge-shaped structure with a decreasing diameter from top to bottom.

9. The winding roller assembly of the lithium-ion battery separator coating machine according to claim 7, characterized in that: A hemispherical ball (551) is provided at one end of the piston push rod (55) that abuts against the limit plate (6).

Images