A winding needle device and a winding machine

Abstract

This utility model provides a needle winding device and a winding machine, relating to the field of new energy batteries. The needle winding device includes an inner winding needle, an outer winding needle, a buffer component, and a driving component. The driving component, buffer component, and inner winding needle are connected sequentially. The outer winding needle includes a first needle body and a second needle body spaced apart, with a through groove formed between the first and second needle bodies. The inner winding needle is accommodated in the through groove and simultaneously cooperates with both the first and second needle bodies. The first and second needle bodies are used to move closer or further apart under the action of the inner winding needle. Airflow holes are formed on the outer walls of the first and second needle bodies. These airflow holes are used to generate negative pressure airflow during pre-winding and positive pressure airflow during cell setting. This needle winding device and winding machine can improve the separation effect between the separator and the outer winding needle through positive pressure airflow, avoiding separator wrinkling due to adhesion, preventing core pulling, and thus ensuring cell quality.

Description

Technical Field

[0001] This utility model relates to the field of new energy batteries, and more specifically, to a needle winding device and a winding machine. Background Technology

[0002] In the development of lithium battery equipment, improving cell quality and accelerating production efficiency are the two most important goals of the lithium battery industry. Cell winding is undoubtedly a key link that determines cell quality and cell production efficiency.

[0003] In the prior art, a winding device is used to wind the battery cell. The outer winding needle in the winding device usually has negative pressure holes on its surface for adsorbing the separator. However, when the separator is separated from the outer winding needle, adhesion can easily occur, which can lead to wrinkling of the separator and affect the quality of the battery cell. Utility Model Content

[0004] This utility model provides a needle winding device and a winding machine, which can improve the separation effect between the diaphragm and the outer winding needle through positive pressure airflow, avoid wrinkling of the diaphragm due to adhesion, prevent core pulling, and thus ensure the quality of the battery cell.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a needle winding device, which includes:

[0007] Inward-curling needles, outward-curling needles, buffer components, and drive components;

[0008] The driving component, the buffer component, and the inward-curling needle are connected in sequence. The outward-curling needle includes a first needle body and a second needle body that are spaced apart. A through groove is formed between the first needle body and the second needle body. The inward-curling needle is accommodated in the through groove and cooperates with both the first needle body and the second needle body. The first needle body and the second needle body are used to move closer to or further away from each other under the action of the inward-curling needle.

[0009] Airflow holes are formed on the outer sidewalls of the first needle body and the second needle body. The airflow holes are used to form negative pressure airflow during pre-winding and positive pressure airflow during cell setting.

[0010] Optionally, grooves are formed on both sides of the side of the first needle body and the second needle body that are far apart from each other, and the grooves are provided to penetrate the first needle body or the second needle body in the axial direction.

[0011] Optionally, the airflow hole is located between the groove and the through slot.

[0012] Optionally, the needle winding device further includes a locking member, which includes a locking seat and a clamp, the clamp being movably connected to the locking seat and used to lock or unlock the buffer, and the drive member being used to disengage from the buffer when the clamp locks the buffer.

[0013] Optionally, the inward-curling needle includes a needle seat, a compression spring, a sliding rod, and an adjusting slider. A portion of the adjusting slider, the compression spring, and the sliding rod are all housed in the needle seat. Both ends of the sliding rod are connected to the compression spring and the buffer, respectively. The adjusting slider cooperates with the sliding rod and is used to hold the first needle body or the second needle body. The sliding rod is used to move axially under the action of the buffer and drive the adjusting slider to move radially.

[0014] Optionally, the inward-rolling needle further includes a sliding wheel connected to a sliding rod. The adjusting slider has a sliding groove, the extension direction of which is at an angle to the axial direction of the sliding rod, and the sliding wheel is slidably accommodated in the sliding groove.

[0015] Optionally, the buffer includes a support shaft, a mounting base, a spring block, a shock-absorbing spring, and a first cover plate. The mounting base, the spring block, the shock-absorbing spring, and the first cover plate are sequentially arranged on the support shaft along the direction close to the driving member. The shock-absorbing spring is connected between the spring block and the first cover plate, and the first cover plate is connected to the driving member.

[0016] Optionally, the buffer further includes a second cover plate, a connector, a buffer spring, and a centering sleeve. The second cover plate, the connector, and the centering sleeve are arranged sequentially along the direction close to the inward-rolling needle. The connector is mounted on the support shaft via a bearing. The second cover plate is connected to the connector. One end of the connector is slidably connected to the centering sleeve. The buffer spring is sleeved on the end of the connector close to the centering sleeve.

[0017] Optionally, the driving component includes a driving base, a power source, and a top block. The power source is mounted on the driving base, and the top block is disposed on the output shaft of the power source and connected to the buffer component.

[0018] An embodiment of this utility model also provides a winding machine, comprising:

[0019] A positive pressure air source, a negative pressure air source, and the aforementioned needle winding device; wherein the positive pressure air source and the negative pressure air source are both connected to the airflow hole.

[0020] The beneficial effects of the needle winding device and winding machine of this utility model embodiment include, for example:

[0021] The winding device includes an inner winding needle, an outer winding needle, a buffer, and a driving component. The driving component, buffer, and inner winding needle are connected sequentially. The outer winding needle includes a first needle body and a second needle body spaced apart, with a through groove formed between them. The inner winding needle is accommodated in the through groove and simultaneously engages with both the first and second needle bodies. The first and second needle bodies are moved closer or further apart under the action of the inner winding needle. Airflow holes are formed on the outer walls of the first and second needle bodies. These airflow holes output negative pressure airflow during pre-winding and positive pressure airflow during cell setting. During operation, the inner winding needle moves via the buffer under the action of the driving component, causing the first and second needle bodies to move closer or further apart, thus adjusting the cell winding size. The airflow holes can output negative pressure airflow during pre-winding to adsorb the separator and can also output positive pressure airflow during cell setting to improve the separation effect between the separator and the outer winding needle, preventing separator wrinkling due to adhesion, preventing core pulling, and thus ensuring cell quality.

[0022] The winding machine includes a positive pressure air source, a negative pressure air source, and a needle winding device; wherein, both the positive pressure air source and the negative pressure air source are connected to the airflow hole, and the winding machine has all the functions of the needle winding device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the needle winding device provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the externally coiled needle provided in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the inward-rolling needle provided in an embodiment of the present invention;

[0027] Figure 4 This is a partial working diagram of the needle winding device provided in the embodiments of this utility model. Figure 1 ;

[0028] Figure 5 This is a partial working diagram of the needle winding device provided in the embodiments of this utility model. Figure 2 ;

[0029] Figure 6This is a schematic diagram of the structure of the driving component provided in an embodiment of this utility model.

[0030] Icons: 100-Needle winding device; 110-Inner winding needle; 111-Needle seat; 112-Compression spring; 113-Sliding rod; 114-Adjusting slider; 115-Sliding wheel; 116-Sliding groove; 120-Outer winding needle; 121-First needle body; 122-Second needle body; 123-Through groove; 124-Airflow hole; 125-Groove; 129-Clamping block; 130-Buffer component; 131-Support shaft; 132-Mounting seat; 133-Spring block; 134-Shock-absorbing spring; 135-First cover plate; 136-Second cover plate; 137-Connector; 138-Buffer spring; 139-Centering sleeve; 140-Drive component; 141-Drive seat; 142-Power source; 143-Top block; 150-Locking component; 151-Locking seat; 152-Clamping device. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0039] Please refer to Figure 1 and Figure 2 The needle winding device 100 and winding machine provided in the embodiments of this utility model can solve the above problems, and will be described in detail below.

[0040] The needle winding device 100 is used in a winding machine and includes an inner needle winding 110, an outer needle winding 120, a buffer 130, and a drive 140.

[0041] The drive unit 140, the buffer unit 130, and the inner coiled needle 110 are connected in sequence. The outer coiled needle 120 includes a first needle body 121 and a second needle body 122 that are spaced apart. A through groove 123 is formed between the first needle body 121 and the second needle body 122. The inner coiled needle 110 is accommodated in the through groove 123 and simultaneously cooperates with the first needle body 121 and the second needle body 122. The first needle body 121 and the second needle body 122 are used to move closer to or further away from each other under the action of the inner coiled needle 110.

[0042] Airflow holes 124 are formed on the outer side walls of the first needle body 121 and the second needle body 122. The airflow holes 124 are used to form negative pressure airflow during pre-winding and positive pressure airflow during battery cell installation.

[0043] During operation, the inner winding needle 110 can be moved by the buffer 130 under the action of the driving component 140, so that the first needle body 121 and the second needle body 122 move closer or further apart, thereby adjusting the winding size of the battery cell. The airflow hole 124 can output negative pressure airflow to adsorb the separator during pre-winding, and can also output positive pressure airflow during battery cell unwinding to improve the separation effect between the separator and the outer winding needle 120, avoiding separator wrinkling due to adhesion, preventing core pulling, and thus ensuring battery cell quality.

[0044] Specifically, the airflow hole 124 can be connected to both the positive pressure air source and the negative pressure air source of the winding machine. When a positive pressure airflow is required, the channel connected to the negative pressure air source can be closed; when a negative pressure airflow is required, the channel connected to the positive pressure air source can be closed.

[0045] Please refer to Figure 2 Grooves 125 are formed on both sides of the face of the first needle body 121 and the second needle body 122 that are far apart from each other. The grooves 125 are provided to penetrate the first needle body 121 or the second needle body 122 axially. Furthermore, airflow holes 124 are located between the grooves 125 and the through grooves 123, that is, airflow holes 124 on the first needle body 121 are formed on both sides thereof, and airflow holes 124 on the second needle body 122 are also formed on both sides thereof.

[0046] In this embodiment, both the first needle body 121 and the second needle body 122 are approximately semi-cylindrical structures, that is, their cross-sections are semi-circular, and the sides of the two that are far apart from each other can be understood as the arc-shaped surface on the semi-cylindrical structure.

[0047] In this embodiment, there are multiple airflow holes 124 located on the same side of the same needle body, arranged in double rows and multiple columns. Of course, in other embodiments of this invention, the multiple airflow holes 124 can also be arranged in single rows and multiple columns, or in three rows and multiple columns, or in four rows and multiple columns; the specific arrangement is not limited. Furthermore, the cross-sectional shape of the airflow hole 124 in this embodiment is circular. In other embodiments of this invention, the cross-sectional shape of the airflow hole 124 can also be rectangular, triangular, semi-circular, or other shapes; the shape of the cross-sectional shape of the airflow hole 124 is not limited.

[0048] Please refer to Figure 3The inward-curling needle 110 includes a needle seat 111, a compression spring 112, a sliding rod 113, and an adjusting slider 114. Part of the adjusting slider 114, the compression spring 112, and the sliding rod 113 are all housed in the needle seat 111. The two ends of the sliding rod 113 are respectively connected to the compression spring 112 and the buffer member 130. The adjusting slider 114 cooperates with the sliding rod 113 and is used to hold the first needle body 121 or the second needle body 122. The sliding rod 113 is used to move axially under the action of the buffer member 130 and drive the adjusting slider 114 to move radially.

[0049] Furthermore, the inward-rolling needle 110 also includes a sliding wheel 115, which is connected to the sliding rod 113. The adjusting slider 114 has a sliding groove 116, and the extension direction of the sliding groove 116 is set at an angle to the axial direction of the sliding rod 113. The sliding wheel 115 is slidably accommodated in the sliding groove 116.

[0050] During operation, the sliding rod 113 moves axially under the action of the buffer 130, thereby compressing the compression spring 112. At the same time, the sliding rod 113 can drive the sliding wheel 115 to move. Through the sliding engagement of the sliding wheel 115 and the sliding groove 116, the adjusting slider 114 moves radially relative to the sliding rod 113, thereby supporting the first needle body 121 or the second needle body 122, and realizing the adjustment of the winding size.

[0051] Please refer to Figure 4 and Figure 5 The buffer 130 includes a support shaft 131, a mounting base 132, a spring block 133, a shock-absorbing spring 134, and a first cover plate 135. The mounting base 132, the spring block 133, the shock-absorbing spring 134, and the first cover plate 135 are sequentially arranged on the support shaft 131 in the direction close to the drive member 140. The shock-absorbing spring 134 is connected between the spring block 133 and the first cover plate 135. The first cover plate 135 is connected to the drive member 140.

[0052] Furthermore, the buffer component 130 also includes a second cover plate 136, a connector 137, a buffer spring 138, and a centering sleeve 139. The second cover plate 136, the connector 137, and the centering sleeve 139 are arranged sequentially along the direction close to the inward-curling needle 110. The connector 137 is mounted on the support shaft 131 via a bearing. The second cover plate 136 is connected to the connector 137. One end of the connector 137 is slidably connected to the centering sleeve 139. The buffer spring 138 is sleeved on the end of the connector 137 close to the centering sleeve 139. Specifically, the centering sleeve 139 is connected to the sliding rod 113 in the inward-curling needle 110.

[0053] During operation, the damping spring 134 can dampen the axial force generated by the drive member 140 towards the support shaft 131, while the buffer spring 138 is used to buffer the axial force on the connector 137, so that the overall buffer member 130 can play a buffering and damping effect during the axial movement of the drive member 140 driving the sliding rod 113.

[0054] Please refer to Figure 4 and Figure 5 The needle winding device 100 also includes a locking member 150, which includes a locking seat 151 and a clamp 152. The clamp 152 is movably connected to the locking seat 151 and is used to lock or unlock the buffer member 130.

[0055] It is worth noting that the buffer 130 also includes a clamping block 129, which is connected to the spring block 133 and is used to cooperate with the clamp 152 to achieve the locking operation.

[0056] It should be noted that the drive member 140 is used to disengage from the buffer member 130 when the clamp 152 locks the clamping block 129 of the buffer member 130, so as to facilitate operation on other buffer members 130. That is, a single drive member 140 can be used to operate on multiple sets of buffer members 130.

[0057] Please refer to Figure 6 The drive unit 140 includes a drive base 141, a power source 142, and a top block 143. The power source 142 is mounted on the drive base 141, and the top block 143 is disposed on the output shaft of the power source 142 and connected to the buffer unit 130. Specifically, the top block 143 is connected to the first cover plate 135 in the buffer unit 130.

[0058] During operation, the drive seat 141 supports the power source 142, which generates power and drives the buffer 130 to move through the top block 143 at the end of the output shaft.

[0059] In this embodiment, the power source 142 is preferably an electric cylinder; of course, in other embodiments of this utility model, the power source 142 can also be a pneumatic cylinder, a hydraulic cylinder, or a lead screw and slide rail structure, and there is no limitation on its specific power structure.

[0060] An embodiment of this utility model also provides a winding machine, including: a positive pressure air source, a negative pressure air source, and a winding needle device 100; wherein, both the positive pressure air source and the negative pressure air source are connected to the airflow hole 124. When it is necessary to form a positive pressure airflow, the channel connected to the negative pressure air source can be closed; when it is necessary to form a negative pressure airflow, the channel connected to the positive pressure air source can be closed.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A needle winding device, characterized in that, include: Inward-curling needle (110), outward-curling needle (120), buffer (130), and drive (140); The driving member (140), the buffer member (130), and the inward-curling needle (110) are connected in sequence. The outward-curling needle (120) includes a first needle body (121) and a second needle body (122) spaced apart. A through groove (123) is formed between the first needle body (121) and the second needle body (122). The inward-curling needle (110) is accommodated in the through groove (123) and cooperates with both the first needle body (121) and the second needle body (122). The first needle body (121) and the second needle body (122) are used to move closer to or further away from each other under the action of the inward-curling needle (110). Airflow holes (124) are formed on the outer sidewalls of the first needle body (121) and the second needle body (122). The airflow holes (124) are used to form negative pressure airflow during pre-winding and positive pressure airflow during cell setting.

2. The needle winding device according to claim 1, characterized in that, Grooves (125) are formed on both sides of the side of the first needle body (121) and the second needle body (122) that are far apart from each other. The grooves (125) are provided to penetrate the first needle body (121) or the second needle body (122) in the axial direction.

3. The needle winding device according to claim 2, characterized in that, The airflow hole (124) is located between the groove (125) and the through groove (123).

4. The needle winding device according to any one of claims 1-3, characterized in that, The needle winding device further includes a locking member (150), which includes a locking seat (151) and a clamp (152). The clamp (152) is movably connected to the locking seat (151) and is used to lock or unlock the buffer (130). The drive member (140) is used to disengage from the buffer (130) when the clamp (152) locks the buffer (130).

5. The needle winding device according to any one of claims 1-3, characterized in that, The inward-curling needle (110) includes a needle seat (111), a compression spring (112), a sliding rod (113), and an adjusting slider (114). Part of the adjusting slider (114), the compression spring (112), and the sliding rod (113) are all housed in the needle seat (111). Both ends of the sliding rod (113) are connected to the compression spring (112) and the buffer (130), respectively. The adjusting slider (114) cooperates with the sliding rod (113) and is used to abut against the first needle body (121) or the second needle body (122). The sliding rod (113) is used to move axially under the action of the buffer (130) and drive the adjusting slider (114) to move radially.

6. The needle winding device according to claim 5, characterized in that, The inward-rolling needle (110) also includes a sliding wheel (115), which is connected to the sliding rod (113). The adjusting slider (114) has a sliding groove (116), and the extending direction of the sliding groove (116) is set at an angle to the axial direction of the sliding rod (113). The sliding wheel (115) is slidably accommodated in the sliding groove (116).

7. The needle winding device according to any one of claims 1-3, characterized in that, The buffer (130) includes a support shaft (131), a mounting base (132), a spring block (133), a shock-absorbing spring (134), and a first cover plate (135). The mounting base (132), the spring block (133), the shock-absorbing spring (134), and the first cover plate (135) are sequentially arranged on the support shaft (131) in a direction close to the drive member (140). The shock-absorbing spring (134) is connected between the spring block (133) and the first cover plate (135). The first cover plate (135) is connected to the drive member (140).

8. The needle winding device according to claim 7, characterized in that, The buffer (130) further includes a second cover plate (136), a connector (137), a buffer spring (138), and a centering sleeve (139). The second cover plate (136), the connector (137), and the centering sleeve (139) are arranged sequentially along the direction close to the inward-rolling needle (110). The connector (137) is mounted on the support shaft (131) via a bearing. The second cover plate (136) is connected to the connector (137). One end of the connector (137) is slidably connected to the centering sleeve (139). The buffer spring (138) is sleeved on the end of the connector (137) close to the centering sleeve (139).

9. The needle winding device according to any one of claims 1-3, characterized in that, The drive unit (140) includes a drive base (141), a power source (142), and a top block (143). The power source (142) is mounted on the drive base (141), and the top block (143) is disposed on the output shaft of the power source (142) and connected to the buffer (130).

10. A winding machine, characterized in that, include: Positive pressure air source, negative pressure air source, and the needle winding device according to any one of claims 1-9; The positive pressure air source and the negative pressure air source are both connected to the airflow hole (124).

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