Battery cell winding device and equipment

Abstract

The utility model discloses a battery cell winding device and equipment, the battery cell winding device comprises a variable diameter winding needle assembly, a variable diameter adjusting assembly, an insertion piece assembly and an insertion piece driving assembly, the insertion piece assembly comprises an insertion piece, an insertion piece supporting mechanism and an insertion piece linkage mechanism, the insertion piece is connected with the insertion piece linkage mechanism and is movably arranged on the insertion piece supporting mechanism, and the insertion piece driving assembly is arranged on the insertion piece supporting mechanism. The insertion piece supporting mechanism is connected to the rear part of a needle seat of the variable-diameter winding needle assembly, and an insertion piece groove for the insertion piece to axially penetrate through is axially formed in the needle seat; the insertion piece driving assembly comprises a butt joint driving mechanism in butt joint with the insertion piece linkage mechanism and a telescopic driving mechanism driving the butt joint driving mechanism to move in the axial direction. According to the utility model, the control of the insertion sheet is more flexible; meanwhile, the variable-diameter winding needle assembly is driven by the variable-diameter adjusting assembly, a parallel opening and closing mode is adopted, and the winding stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery processing, and particularly relates to a core winding device and equipment for a battery cell. Background Art

[0002] Wound batteries are widely promoted and used in the industry due to their many advantages. The core of a wound battery is processed by a winding device. Specifically, the positive and negative electrode sheets and the separator are unwound separately and then concentrated on the winding device for winding to form a wound battery cell.

[0003] The winding needle assembly is the core part of the core winding device. The winding needle assembly generally includes a needle base, an inner needle, a fixed outer needle and a movable outer needle. The inner needle, the fixed outer needle and the movable outer needle are arranged in parallel, and the roots of each are arranged on the needle base; the inner needle and the fixed outer needle are used to clamp the head of the material (the laminated composite material of the positive electrode sheet, the separator and the negative electrode sheet), and the movable outer needle is located on the radial other side of the fixed outer needle and is used to adjust the winding radius.

[0004] For the square battery wound by the prior art, due to the existence of winding tension and the structural characteristics of the square battery cell, the lengths of the inner and outer layers of the battery cell are inconsistent with the lengths of the inner and outer layers of the ideal shape. Usually, the length of the outer circle is less than the ideal value, and the length of the inner circle is greater than the ideal value, resulting in battery deformation and inner layer wrinkles.

[0005] Currently, there is a method to solve the problems of battery deformation and inner layer wrinkles by inserting a sheet during the winding process to increase the length of the outer layer of the electrode sheet and the separator. However, currently, the winding device with the function of inserting a sheet is only used for the core winding device with a fixed needle, and its mechanism stability is poor, and the control of inserting the sheet is not flexible enough. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a core winding device and equipment for a battery cell, aiming to improve the flexibility of the control of inserting a sheet during variable-diameter winding. The utility model is realized through the following solutions.

[0007] In the first aspect of the utility model, a core winding device for a battery cell is provided, including:

[0008] A variable-diameter winding needle assembly, including a needle base and an inner needle, a fixed outer needle, a movable outer needle and a first movable block arranged on the needle base. The first movable block is connected to the root of the movable outer needle inside the needle base and has a first abutting inclined surface arranged outside the needle base. When the first abutting inclined surface bears a first abutting force, the first movable block drives the movable outer needle to move radially;

[0009] A variable-diameter adjusting assembly, including a first abutting mechanism arranged on the periphery of the needle base and an abutting driving mechanism for driving the first abutting mechanism to abut and cooperate with the first abutting inclined surface;

[0010] The insert component includes an insert piece, an insert piece support mechanism, and an insert piece linkage mechanism. The insert piece is connected to the insert piece linkage mechanism and is movably arranged on the insert piece support mechanism. The insert piece support mechanism is connected behind the needle holder, and an insert piece groove for the axial insertion of the insert piece is axially provided on the needle holder.

[0011] The insert piece driving component includes a docking driving mechanism docked with the insert piece linkage mechanism and a telescopic driving mechanism for driving the docking driving mechanism to move axially.

[0012] As a preferred technical solution, the variable-diameter coiling needle component further includes a second movable block. The second movable block is connected to the root of the inner needle inside the needle holder and has a second abutting inclined surface arranged outside the needle holder. When the second abutting inclined surface bears a second abutting force, the second movable block drives the inner needle to move radially. The variable-diameter adjusting component further includes a second abutting mechanism arranged on the periphery of the needle holder. The second abutting mechanism is driven by the abutting driving mechanism and abuts and cooperates with the second abutting inclined surface.

[0013] As a preferred technical solution, a reset elastic member is arranged inside the needle holder. The reset elastic member exerts a force on the first movable block in a direction opposite to the first abutting force, and exerts a force on the second movable block in a direction opposite to the second abutting force.

[0014] As a preferred technical solution, a guiding member is arranged inside the needle holder. The first movable block and the second movable block are arranged on the guiding member to move radially.

[0015] As a preferred technical solution, the insert piece support mechanism includes a docking seat, a support sleeve, and a fitting sleeve. The support sleeve is rotatably assembled inside the fitting sleeve. The docking seat is connected between the front end of the support sleeve and the rear end of the needle holder.

[0016] As a preferred technical solution, the insert piece linkage mechanism includes a linkage shaft rod and a shaft rod sleeve. The front end of the shaft rod sleeve is fixedly connected to the rear end of the support sleeve. The linkage shaft rod axially moves and circumferentially rotates through the shaft rod sleeve and the support sleeve. The rear end of the insert piece is connected to the front end of the linkage shaft rod.

[0017] As a preferred technical solution, a first push block is arranged at the rear end of the linkage shaft rod. The docking driving mechanism includes a second push block, a swing arm mechanism, and a swing arm driving mechanism. The second push block is fixedly arranged at the free end of the swing arm mechanism. The swing arm driving mechanism drives the swing arm mechanism to swing and enables the second push block and the first push block to axially limit and engage or separate from each other.

[0018] As a preferred technical solution, the telescopic driving mechanism includes a bracket, a slider, a lead screw and a telescopic motor. The slider is axially slidably arranged on the bracket, and the swing arm mechanism and the swing arm driving mechanism are arranged on the slider; the telescopic motor drives the slider to slide axially through the lead screw.

[0019] In a second aspect of the present invention, a battery cell winding device is provided, including: a winding frame mechanism, a station switching driving mechanism, a needle inserting and pulling driving mechanism, and three groups of the above-mentioned battery cell winding devices; the three groups of the battery cell winding devices are arranged on the winding frame mechanism, and the station switching driving mechanism drives the winding frame mechanism to rotate and drives the three groups of the battery cell winding devices thereon to switch between a winding station, a glue sticking station and a blanking station; the needle inserting and pulling driving mechanism drives the battery cell winding device to axially move relative to the winding frame mechanism.

[0020] As a preferred technical solution, the battery cell winding device further includes a winding needle support assembly, which is arranged opposite to the three groups of the battery cell winding devices.

[0021] For the battery cell winding device and equipment provided by the present invention, through the docking driving mechanism of the insert driving assembly, it is possible to flexibly control the docking or separation with the insert linkage mechanism. When the docking driving mechanism is docked with the insert linkage mechanism, the docking driving mechanism can be axially driven at any time through the telescopic driving mechanism of the insert driving assembly, thereby driving the insert linkage mechanism and even the insert to expand and contract, making the control of the insert more flexible; at the same time, the variable diameter winding needle assembly is driven by the variable diameter adjusting assembly, and the parallel opening and closing method is adopted, which improves the winding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional view of the variable diameter winding needle assembly and the variable diameter adjusting assembly in the battery cell winding device provided by the embodiment of the present invention.

[0023] Figure 2 It is an exploded view of the variable diameter winding needle assembly and the variable diameter adjusting assembly in the battery cell winding device provided by the embodiment of the present invention.

[0024] Figure 3 It is a three-dimensional view of the insert assembly in the battery cell winding device provided by the embodiment of the present invention.

[0025] Figure 4 It is a cross-sectional view of the insert assembly in the battery cell winding device provided by the embodiment of the present invention.

[0026] Figure 5 It is a three-dimensional view of the insert driving assembly in the battery cell winding device provided by the embodiment of the present invention.

[0027] Figure 6A perspective view of the battery core winding device provided by the embodiment of the present utility model. Detailed implementation manners

[0028] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", "front side", "back side", etc. are all based on the orientation or relative positional relationships shown in the drawings, aiming to clearly describe the structure of the product or device and not for limiting the actual orientation of the product or device during production, use, sales, etc.

[0030] In addition, the terms "first" and "second" are only used for the purpose of distinction in the description and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0031] It should be noted that the axial direction and the radial direction mentioned in the embodiments of the present utility model are both based on the rotation axis of the winding needle. That is, the axial direction refers to the direction parallel to the rotation axis of the winding needle, and the radial direction refers to the direction perpendicular to the rotation axis of the winding needle.

[0032] Combined with Figure 1 、 Figure 3 and Figure 5 As shown, the battery core winding device provided in this embodiment includes: a variable-diameter winding needle assembly 10, a variable-diameter adjustment assembly 20, a blade insertion assembly 30, and a blade insertion driving assembly 40. Of course, the battery core variable-perimeter winding device also includes a rotation driving assembly 50 for driving the variable-diameter winding needle assembly 10 to rotate (see Figure 6 shown).

[0033] Combined with Figure 1 and Figure 2As shown in the figure, the variable-diameter winding needle assembly 10 includes a needle base 11 and a movable inner needle 12, a fixed outer needle 13, a movable outer needle 14, a first movable block 15, and a second movable block 16 disposed on the needle base 11. The needle base 11 includes a first base 111 and a second base 112 that mates with it, and the root of the fixed outer needle 13 is fixedly installed on the first base 111. The first movable block 15 is connected to the root of the movable outer needle 14 inside the needle base 11 and has a first abutting slope 151 disposed outside the needle base 11. When the first abutting slope 151 bears the first abutting force, the first movable block 15 drives the movable outer needle 14 to move radially. In this way, the radial distance between the movable outer needle 14 and the fixed outer needle 13 is adjustable, thereby realizing variable-diameter winding.

[0034] In addition, the second movable block 16 is connected to the root of the inner needle 12 inside the needle base 11 and has a second abutting slope 161 disposed outside the needle base 11. When the second abutting slope 161 bears the second abutting force, the second movable block 16 drives the inner needle 12 to move radially. In this way, the inner needle 12 can be clamped or loosened relative to the fixed outer needle 13, so as to clamp the head of the material to be wound (the pole piece and the diaphragm) and start winding, or loosen the head of the material to be wound (the pole piece and the diaphragm) when the winding is completed, so as to facilitate needle withdrawal. In this embodiment, the first abutting slope 151 and the second abutting slope 161 are respectively disposed on two opposite outer side surfaces of the needle base 11.

[0035] Combined with Figure 2 As shown in the figure, the variable-diameter adjustment assembly 20 includes a first abutting mechanism 21 disposed on the periphery of the needle base 11 and an abutting drive mechanism 25 that drives the first abutting mechanism 21 to abut and cooperate with the first abutting slope 151; the variable-diameter adjustment assembly 20 further includes a second abutting mechanism 22 disposed on the periphery of the needle base 11, and the second abutting mechanism 22 is driven by the abutting drive mechanism 25 to abut and cooperate with the second abutting slope 161. Specifically, the abutting drive mechanism 25 is a winding needle opening and closing disc mechanism. Axially pushing the winding needle opening and closing disc mechanism can respectively realize the parallel opening and closing of the winding needle. For the specific structure and assembly method of the abutting drive mechanism 25, the first abutting mechanism 21, and the second abutting mechanism 22, reference can be made to the relevant records in the patent application No. CN202311860934.8, which will not be elaborated herein.

[0036] Continuing to refer to Figure 2 , a plurality of reset elastic members 17 are further disposed inside the needle base 11. The reset elastic members 17 exert forces on the first movable block 15 in a direction opposite to the first abutting force and on the second movable block 16 in a direction opposite to the second abutting force. In addition, a plurality of guiding members 18 are further disposed inside the needle base 11. The first movable block 15 and the second movable block 16 are radially movably disposed on the corresponding guiding members 18.

[0037] Referring to Figure 3 and Figure 4, the insert component 30 includes an insert piece 31, an insert piece support mechanism 32 and an insert piece linkage mechanism 33. The insert piece 31 is connected to the insert piece linkage mechanism 33 and is movably arranged on the insert piece support mechanism 32. The insert piece support mechanism 32 is connected behind the needle base 11, and an insert piece groove for the axial insertion of the insert piece 31 is axially provided on the needle base 11. In this embodiment, the insert piece 31 passes out from below the movable inner needle 12, the fixed outer needle 13, and the movable outer needle 14, as shown in combination with Figure 2 as shown.

[0038] Among them, the insert piece support mechanism 32 includes a docking seat 321, a support sleeve 322 and a fitting sleeve 323. The support sleeve 322 is rotatably assembled in the fitting sleeve 323. The docking seat 321 is connected between the front end of the support sleeve 322 and the rear end of the needle base 11. In addition, the insert piece linkage mechanism 33 includes a linkage shaft rod 332 and a shaft rod sleeve 331. The front end of the shaft rod sleeve 331 is fixedly connected to the rear end of the support sleeve 322. The linkage shaft rod 332 is axially movable and circumferentially rotatable and passes through the shaft rod sleeve 331 and the support sleeve 322. The rear end of the insert piece 31 is connected to the front end of the linkage shaft rod 332, and a first push block 335 is arranged at the rear end of the linkage shaft rod 332.

[0039] Specifically, an insert piece mounting block 336 is fixedly connected to the front end of the linkage shaft rod 332. The rear end of the insert piece 31 is assembled on the mounting block 336 through a fixing pin 337.

[0040] As shown in combination with Figure 5 as shown, the insert piece driving component 40 includes a docking driving mechanism 41 and a telescopic driving mechanism 42. The docking driving mechanism 41 is used to form a docking with the insert piece linkage mechanism 33, and the telescopic driving mechanism 42 is used to drive the docking driving mechanism 41 and the insert piece linkage mechanism 33 and the insert piece 31 docked therewith to move axially.

[0041] Among them, the docking driving mechanism 41 includes a second push block 415, a swing arm mechanism 416 and a swing arm driving mechanism 417. The second push block 415 is fixedly arranged at the free end of the swing arm mechanism 416. The swing arm driving mechanism 417 drives the swing arm mechanism 416 to swing and enables the second push block 415 and the first push block 335 arranged at the rear end of the linkage shaft rod 332 to be axially limited and engaged or separated from each other. When the second push block 415 and the first push block 335 are axially limited and engaged with each other, the first push block 335 can move axially with the second push block 415.

[0042] In addition, the telescopic drive mechanism 42 includes a bracket 421, a slider 422, a lead screw 423 and a telescopic motor 424. The slider 422 is axially slidably disposed on the bracket 421, and the swing arm mechanism 416 and the swing arm drive mechanism 417 are disposed on the slider 422. The telescopic motor 424 drives the slider 422 to axially slide through the lead screw 423. When the second push block 415 and the first push block 335 are axially engaged with each other in a limiting manner, when the telescopic motor 424 drives the slider 422 to axially slide, the insert linkage mechanism 33 and the insert 31 can be axially moved, so that the insert 31 extends below or retracts from the movable inner needle 12, the fixed outer needle 13, and the movable outer needle 14.

[0043] Combined with Figure 6 As shown in the figure, this embodiment also provides a battery cell winding device, including: a winding frame mechanism 60, a station switching drive mechanism 70, a needle inserting and extracting drive mechanism 80, and three sets of the above-mentioned battery cell winding devices; the three sets of the battery cell winding devices are arranged on the winding frame mechanism 60 in parallel and at equal angular intervals. The station switching drive mechanism 70 drives the winding frame mechanism 60 to rotate and drives the three sets of battery cell winding devices thereon to switch between a winding station, a gluing station, and a blanking station; the needle inserting and extracting drive mechanism 80 drives the battery cell winding device to axially move relative to the winding frame mechanism to control the overall needle insertion or extraction of the battery cell winding device. In addition, the battery cell winding device further includes a winding needle support assembly 90, which is disposed opposite to the three sets of battery cell winding devices and is used to support the ends of the movable inner needle 12, the fixed outer needle 13, and the movable outer needle 14 of each variable-diameter winding needle assembly 10.

[0044] Through the docking drive mechanism 41 of the insert drive assembly 40 of the present utility model, the docking or separation with the insert linkage mechanism 33 can be flexibly controlled. When the docking drive mechanism 41 is docked with the insert linkage mechanism 33, the docking drive mechanism 41 can be axially moved at any time through the telescopic drive mechanism 42 of the insert drive assembly 40, thereby driving the insert linkage mechanism 33 and even the insert 31 to expand and contract, making the control of the insert 31 more flexible; at the same time, the variable-diameter winding needle assembly 10 is driven by a variable-diameter adjustment assembly and adopts a parallel opening and closing method, improving the winding stability.

[0045] The above-disclosed are only the preferred embodiments of the present application. Of course, the scope of the rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A core winding device, characterized in that, Comprising: A variable-diameter winding needle assembly, including a needle base and an inner needle, a fixed outer needle, a movable outer needle and a first movable block arranged on the needle base. The first movable block is connected to the root of the movable outer needle inside the needle base and has a first abutting inclined surface arranged outside the needle base. When the first abutting inclined surface bears a first abutting force, the first movable block drives the movable outer needle to move radially; A variable-diameter adjusting assembly, including a first abutting mechanism arranged on the periphery of the needle base and an abutting driving mechanism for driving the first abutting mechanism to abut and cooperate with the first abutting inclined surface; A blade assembly, including a blade, a blade support mechanism and a blade linkage mechanism. The blade is connected to the blade linkage mechanism and is movably arranged on the blade support mechanism. The blade support mechanism is connected behind the needle base, and a blade slot for the blade to axially penetrate is axially opened on the needle base; A blade driving assembly, including a docking driving mechanism docked with the blade linkage mechanism and a telescopic driving mechanism for driving the docking driving mechanism to move axially.

2. The core winding device according to claim 1, characterized in that, The variable-diameter winding needle assembly further includes a second movable block. The second movable block is connected to the root of the inner needle inside the needle base and has a second abutting inclined surface arranged outside the needle base. When the second abutting inclined surface bears a second abutting force, the second movable block drives the inner needle to move radially; the variable-diameter adjusting assembly further includes a second abutting mechanism arranged on the periphery of the needle base. The second abutting mechanism is driven by the abutting driving mechanism to abut and cooperate with the second abutting inclined surface.

3. The cell winding device according to claim 2, wherein A reset elastic member is arranged inside the needle base. The reset elastic member applies a force in a direction opposite to the first abutting force to the first movable block and a force in a direction opposite to the second abutting force to the second movable block.

4. The cell winding device according to claim 3, characterized in that, A guiding member is arranged inside the needle base. The first movable block and the second movable block are arranged on the guiding member to move radially.

5. The core winding device according to claim 1, wherein, The blade support mechanism includes a docking seat, a support sleeve and a fitting sleeve. The support sleeve is rotatably assembled inside the fitting sleeve. The docking seat is connected between the front end of the support sleeve and the rear end of the needle base.

6. The cell winding device according to claim 5, wherein The blade linkage mechanism includes a linkage shaft rod and a shaft rod sleeve. The front end of the shaft rod sleeve is fixedly connected to the rear end of the support sleeve. The linkage shaft rod axially moves and circumferentially rotates through the shaft rod sleeve and the support sleeve. The rear end of the blade is connected to the front end of the linkage shaft rod.

7. The cell winding device according to claim 6, characterized in that, A first pushing block is arranged at the rear end of the linkage shaft rod; the docking driving mechanism includes a second pushing block, a swing arm mechanism and a swing arm driving mechanism. The second pushing block is fixedly arranged at the free end of the swing arm mechanism. The swing arm driving mechanism drives the swing arm mechanism to swing and enables the second pushing block and the first pushing block to axially engage or separate in a mutually limiting manner.

8. The core winding device according to claim 7, characterized in that, The telescopic driving mechanism includes a bracket, a slider, a lead screw and a telescopic motor. The slider is axially slidably arranged on the bracket. The swing arm mechanism and the swing arm driving mechanism are arranged on the slider; the telescopic motor drives the slider to axially slide through the lead screw.

9. A battery cell winding device, characterized in that, Comprising: Winding frame mechanism, station switching drive mechanism, needle inserting and extracting drive mechanism, and the battery cell winding device according to any one of claims 1-8; three sets of the battery cell winding devices are arranged on the winding frame mechanism, and the station switching drive mechanism drives the winding frame mechanism to rotate and drives the three sets of the battery cell winding devices thereon to switch between a winding station, a gluing station, and a blanking station; the needle inserting and extracting drive mechanism drives the battery cell winding device to axially move relative to the winding frame mechanism.

10. The core winding device according to claim 9, characterized in that, It further includes a winding needle support assembly, which is arranged opposite to the three sets of the battery cell winding devices.

Images