CN216120433U

CN216120433U - Rolling needle

Info

Publication number: CN216120433U
Application number: CN202122601993.6U
Authority: CN
Inventors: 张汉都; 吴玉源; 周龙; 扈锋; 张喜冲
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-03-22
Anticipated expiration: 2031-10-27

Abstract

The utility model discloses a winding needle, which comprises: the pole piece winding device comprises a central shaft and a support plate, wherein the support plate extends along the circumferential direction and the axial direction of the central shaft, the support plate is movably arranged on the central shaft between a first position and a second position along the radial direction of the central shaft, the first position is located on the radial outer side of the second position, when the support plate is located at the first position, a pole piece to be wound is suitable for being wound on the support plate or the support plate is suitable for supporting a pole piece to be wound, and when the support plate is located at the second position, the support plate is suitable for being separated from the pole piece to be wound. According to the winding needle, the supporting plate which can move between the first position and the second position along the radial direction of the central shaft is arranged, so that the winding needle can be switched between a state of supporting the wound pole piece and a state of separating from the wound pole piece, and the winding needle can be prevented from damaging the wound pole piece in the pulling-out process.

Description

Rolling needle

Technical Field

The utility model relates to the field of batteries, in particular to a winding needle.

Background

In the related art, the battery cell of the lithium ion battery can be divided into a winding structure and a lamination structure, wherein the production mode of the battery cell of the winding structure has the advantages of high production efficiency, low burr risk and the like, so that most of the battery cells of the lithium ion battery adopt the winding structure. In a winding machine for producing the battery core with the winding structure, the positive plate, the negative plate and the diaphragm are fixed on a battery winding needle device through the continuous rotation of a battery winding needle, and the battery core is manufactured through the winding of the battery winding needle. However, when the winding is completed, the friction force between the winding needle and the pole piece or the diaphragm is too large during the process of removing the winding needle from the winding machine, so that the pole piece is easy to fall off powder, and the pole piece and the diaphragm are deformed, which causes the quality of the manufactured battery core to be reduced and further affects the performance of the battery.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a winding needle which can be switched between a state of supporting a winding-formed pole piece and a state of separating from the winding-formed pole piece, and the winding needle is prevented from damaging the winding-formed pole piece in the pulling-out process.

The winding needle according to the utility model comprises: a central shaft; the supporting plate extends along the circumferential direction and the axial direction of the central shaft, the supporting plate is movably arranged on the central shaft between a first position and a second position along the radial direction of the central shaft, the first position is located on the radial outer side of the second position, when the supporting plate is located at the first position, a pole piece to be wound is suitable for being wound on the supporting plate or the supporting plate is suitable for supporting a pole piece to be wound, and when the supporting plate is located at the second position, the supporting plate is suitable for being separated from the pole piece to be wound.

According to the winding needle, the supporting plate which can move between the first position and the second position along the radial direction of the central shaft is arranged, so that the winding needle can be switched between a state of supporting the wound pole piece and a state of separating from the wound pole piece, and the winding needle can be prevented from damaging the wound pole piece in the pulling-out process.

In some embodiments, the central shaft comprises: the supporting plate is arranged on the rod part and extends from one axial end of the rod part to the other axial end of the rod part; the end part is connected with at least one axial end of the rod part and is far away from the rod part in the axial direction to extend outwards, and the radial size of the end part is larger than that of the rod part.

In some embodiments, the end portions are connected to both axial ends of the rod portion, the rod portion and the end portions are cylindrical, and the rod portion and the end portions are coaxially arranged.

In some embodiments, the radially outer surface of the support plate is radially outward of the outer peripheral surface of the end portion when the support plate is in the first position; when the support plate is in the second position, a radially outer surface of the support plate is flush with the outer peripheral surface of the end portion, or the radially outer surface of the support plate is located radially inward of the outer peripheral surface of the end portion.

In some embodiments, the winding pin is used for winding a pole piece, the end portion is used for fixing a bus piece base, the bus piece base is sleeved on the radial outer side of the end portion, when the supporting plate is located at the first position, the radial outer side surface of the supporting plate is flush with the radial outer side surface of the bus piece base, and the pole piece is wound on the outer side surfaces of the bus piece base and the supporting plate.

In some embodiments, the support plate includes a plurality of support plates arranged at intervals in a circumferential direction of the center shaft.

In some embodiments, the support plate includes three support plates disposed at regular intervals in a circumferential direction of the central shaft, and the support plates extend along a circular arc line in the circumferential direction of the central shaft.

In some embodiments, further comprising: the driving piece is connected between the central shaft and the supporting plate, and the height of the driving piece in the radial direction of the central shaft is adjustable.

In some embodiments, the driver comprises: the first pole of mutual articulated and second pole, first pole with any one end in the second pole with the center pin is articulated and the other end with the backup pad is articulated to be connected.

In some embodiments, the length direction of the driving member is along the axial direction of the central shaft, and one end of the first rod and one end of the second rod are arranged at a distance in the axial direction of the central shaft.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic view of a winding pin according to an embodiment of the present invention, wherein a bus bar base is fixed to an end of a central shaft, and a support plate is in a first position;

FIG. 2 is a schematic view of the winding needle shown in FIG. 1 with the support plate in a second position;

FIG. 3 is a schematic view of a winding pin according to another embodiment of the present invention, wherein a bus bar base is fixed to an end of a central shaft and a support plate is in a first position;

FIG. 4 is a schematic view of the winding needle shown in FIG. 3 with the support plate in a second position;

FIG. 5 is a side view of the needle shown in FIG. 1 with the end of the needle central shaft free of the bus bar mount;

FIG. 6 is a side view of the needle shown in FIG. 1 with the end of the needle central shaft provided with a manifold base;

FIG. 7 is a side view of the winding needle shown in FIG. 2;

FIG. 8 is a schematic view of the support plate shown in FIG. 1;

FIG. 9 is a schematic view of the support plate shown in FIG. 3;

fig. 10 is a side view of the support plate shown in fig. 1.

Reference numerals:

a winding needle 100;

a central shaft 110;

a stem 111, an end 112;

a support plate 120;

a driving member 130;

a first rod 131, a second rod 132, a third rod 133;

the manifold base 200.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

A winding needle 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 10.

As shown in fig. 1, a needle 100 according to the present invention may include: a central shaft 110 and a support plate 120.

Specifically, as shown in fig. 1, the support plate 120 extends in the circumferential direction and the axial direction of the central shaft 110, the support plate 120 is movably provided on the central shaft 110 in the radial direction of the central shaft 110 between a first position (e.g., the position where the support plate 120 shown in fig. 1 and 3 is located) and a second position (e.g., the position where the support plate 120 shown in fig. 2 and 4 is located), the first position is located radially outside the second position, the pole piece to be wound is adapted to be wound around the support plate 120 when the support plate 120 is located at the first position, or support plate 120, is adapted to support the wound pole piece, when support plate 120 is in the second position, the support plate 120 is adapted to be separated from the wound pole piece, at which time, the winding pin 100 is adapted to be withdrawn from the wound pole piece, therefore, the winding needle 100 is separated from the pole piece formed by winding, and the situation that the pole piece is damaged by drawing out the winding needle 100 after winding is finished and the quality of the battery is influenced is avoided.

For example, as shown in fig. 1 and 2, the longitudinal direction of the support plate 120 is along the axial direction of the central shaft, the width direction of the support plate is along the circumferential direction of the central shaft 110, when the support plate 120 is at the first position, the winding needle 100 is in a state capable of supporting the winding molding (for example, the state of the winding needle 100 shown in fig. 1 and 3), at this time, the winding work of the pole piece is performed, after the winding is finished, the support plate 120 is switched to the second position, at this time, the outer side surface of the support plate 120 is separated from the inner side surface of the pole piece formed by winding, and the winding needle 100 is in a state of being separated from the pole piece formed by winding (for example, the state of the winding needle 100 in fig. 2 and 4), so as to facilitate the extraction of the winding needle 100, and avoid the occurrence of the damage of the inner side surface of the pole piece formed by winding due to the friction between the winding needle 100 and the pole piece formed by winding during the extraction of the winding needle 100.

According to the winding needle 100 of the embodiment of the utility model, the supporting plate 120 which can move between the first position and the second position along the radial direction of the central shaft 110 is arranged, so that the winding needle 100 can be switched between a state of supporting the winding-formed pole piece and a state of separating from the winding-formed pole piece, and thus, the winding needle 100 can be prevented from damaging the winding-formed pole piece in the process of pulling out.

In an embodiment of the present invention, as shown in fig. 2, the central shaft 110 may include a rod portion 111 and an end portion 112, the support plate 120 is disposed on the rod portion 111 and extends from one axial end to the other axial end of the rod portion 111, that is, the length of the support plate 120 in the axial direction of the rod portion 111 is substantially equal to the length of the rod portion 111, the end portion 112 is connected to at least one axial end of the rod portion 111 and extends outward away from the rod portion 111 in the axial direction, that is, the end portion 112 may be formed at one axial end of the rod portion 111, the end portion 112 may also be formed at two axial ends of the rod portion 111, and the radial dimension of the end portion 112 is greater than the radial dimension of the rod portion 111.

In an embodiment of the present invention, as shown in fig. 1, the end portions 112 are connected to both axial ends of the rod portion 111, the rod portion 111 and the end portions 112 are both cylindrical, and the rod portion 111 and the end portions 112 are coaxially disposed, so that the rod portion 111 and the end portions 112 can coaxially rotate, and stability of the winding process is ensured.

In one embodiment of the present invention, as shown in fig. 1, when the support plate 120 is in the first position, the radially outer surface of the support plate 120 is radially outside the outer peripheral surface of the end portion 112, so that the support plate 120 can directly contact with the inner surface of the wound pole piece to perform a supporting function, and when the support plate 120 is in the second position, the radially outer surface of the support plate 120 is flush with the outer peripheral surface of the end portion 112, or the radially outer surface of the support plate 120 is radially inside the outer peripheral surface of the end portion 112, so that the support plate 120 is completely separated from the inner surface of the wound pole piece to facilitate the extraction of the winding pin 100 from one axial end of the wound pole piece.

In an embodiment of the present invention, as shown in fig. 3, the winding pin 100 is used for winding a pole piece, the end 112 is used for fixing a bus bar base 200, the bus bar base 200 is used for realizing electrical connection between a bus bar and an electrode plate, the bus bar base 200 is sleeved on a radial outer side of the end 112, when the support plate 120 is located at the first position, a radial outer side surface of the support plate 120 is flush with a radial outer side surface of the bus bar base 200, the pole piece is wound on outer side surfaces of the bus bar base 200 and the support plate 120, at this time, the support plate 120 and the bus bar base 200 simultaneously play a role of supporting the wound pole piece, and the built-in of the bus bar base 200 can also be realized, and the assembly steps of the battery are reduced.

For example, as shown in fig. 1 and fig. 2, the bus bar base 200 is sleeved on the radial outer side of the end 112 of the winding needle 100, when winding is performed, the support plate 120 is first located at the first position, at this time, the radial outer side surface of the support plate 120 on the central axis is flush with the radial outer side surface of the bus bar base 200, so that the pole piece is wound on the outer side surfaces of the bus bar base 200 and the support plate 120, when the winding is completed, the support plate 120 returns to the second position, at this time, the bus bar base 200 still supports the inner side surface of the wound pole piece, the support plate 120 is completely separated from the wound pole piece, and the winding needle 100 is drawn out from one axial end of the wound pole piece, so that on one hand, the occurrence of the situation that the wound pole piece is damaged due to friction between the winding needle 100 and the inner side surface of the wound pole piece is avoided, the quality of the battery is improved, on the other hand, the subsequent procedure of internally arranging the confluence piece base 200 is omitted, the process procedure is shortened, and the cost is reduced.

It should be noted that after the pole pieces are wound, the wound pole pieces have a winding tension to clamp the bus bar base 200, so that the stability between the bus bar base 200 and the wound pole pieces is increased, and the backflow effect of the bus bar base 200 is enhanced.

In an embodiment of the present invention, as shown in fig. 1, the supporting plate 120 includes a plurality of supporting plates 120, and the plurality of supporting plates 120 are arranged at intervals in the circumferential direction of the central shaft 110, so that on one hand, the plurality of supporting plates 120 can ensure that the supporting plates 120 can support the wound pole piece in multiple directions in the circumferential direction of the central shaft 110, which is beneficial to smooth proceeding of the pole piece winding process, and on the other hand, the plurality of supporting plates 120 are arranged at intervals in the circumferential direction of the central shaft 110, which can meet the requirement of the space for switching the supporting plates 120 between the first position and the second position, and avoid collision of the supporting plates 120 in the switching process.

As shown in fig. 5, 6 and 7, when the support plate 120 is switched from the second position to the first position, the moving space of the support plate 120 in the circumferential direction of the central axis gradually decreases, and the support plate 120 is arranged at intervals in the circumferential direction, so that the support plate 120 can be freely switched between the first position and the second position.

In an embodiment of the present invention, as shown in fig. 6, the support plate 120 includes three support plates that are uniformly spaced in the circumferential direction of the central shaft 110, and the support plates 120 extend along a circular arc line in the circumferential direction of the central shaft 110, so that the support plates 120 can support the wound pole piece in the circumferential direction of the central shaft 110 in an all-around manner, which is beneficial to the winding of the pole piece.

For example, as shown in fig. 6, three support plates 120 are uniformly spaced in the circumferential direction of the central shaft 110, and the support plates 120 extend along an arc line in the circumferential direction of the central shaft 110, which is beneficial to the stability of the pole piece winding process, so that the inner side surface of the wound pole piece and the outer side surface of the support plate 120 can be in smooth contact, and the possibility of damage to the pole piece during the winding process is reduced.

In an embodiment of the present invention, as shown in fig. 8, the winding pin 100 may further include a driving member 130, the driving member 130 is connected between the central shaft 110 and the supporting plate 120, and the height of the driving member 130 in the radial direction of the central shaft 110 is adjustable, wherein the driving member 130 is configured to drive the supporting plate 120 to move between a first position and a second position, so that the winding pin 100 may be disengaged from the pole piece formed by winding.

In one embodiment of the present invention, as shown in fig. 8, the driving member 130 may include: the first rod 131 and the second rod 132 are hinged to each other, and one end of each of the first rod 131 and the second rod 132 is hinged to the central shaft 110, and the other end of each of the first rod 131 and the second rod 132 is hinged to the support plate 120, that is, one end of the first rod 131 is hinged to the central shaft 110, and the other end of the first rod 131 is connected to the support plate 120, and one end of the second rod 132 is hinged to the central shaft 110, and the other end of the second rod 132 is connected to the support plate 120, so that the support plate 120 can be adjusted in height in the radial direction of the central shaft 110 by the first rod 131 and the second rod 132 being hinged to each other, and the support plate 120 can be moved between the first position and the second position.

For example, as shown in fig. 8, the driving member 130 includes two sets of adjusting rods, each set of adjusting rods includes a first rod 131 and a second rod 132, the first rod 131 and the second rod 132 of each set of adjusting rods are hinged to each other to form a scissor-type structure (the structure of the driving member 130 shown in fig. 8), the first rod 131 of the set near the central shaft 110 is hinged to the first rod of the set near the supporting plate 120, the second rod 132 of the set near the central shaft 110 is hinged to the second rod of the set near the supporting plate 120, ends of the first rod 131 and the second rod 132 of the set near the central shaft 110, which are both close to the central shaft 110, are both hinged to the central shaft 110, and ends of the first rod 131 and the second rod 132 of the set near the supporting plate 120, which are both away from the central shaft 110, are both hinged to the supporting plate 120, thereby achieving the movement of the supporting plate 120 in the radial direction of the central shaft 110.

For another example, as shown in fig. 2, the driving member 130 includes a first rod 131, a second rod 132 and a third rod 133, the first rod 131 and the second rod 132 are hinged to each other at an end away from the central shaft 110, one end of the third rod 133 near the central shaft 110 is hinged to the first rod 131 and the second rod 132 at a position where the first rod 131 and the second rod 132 are hinged, the other ends of the first rod 131 and the second rod 132 are hinged to the central shaft 110, and the other end of the third rod 133 is hinged to the support plate 120, whereby the support plate 120 is moved in a radial direction of the central shaft 110 by a mutual movement among the first rod 131, the second rod 132 and the third rod 133 which are hinged to each other.

In an embodiment of the present invention, as shown in fig. 5, the length direction of the driving member 130 is along the axial direction of the central shaft 110, and one end of the first rod 131 and one end of the second rod 132 are spaced apart in the axial direction of the central shaft 110, and this scissor lift mode can improve the stability of the operation of the driving member 130.

A winding needle 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 10.

Specifically, winding needle 100 may include a central shaft 110, a support plate 120, and a drive member 130.

The central shaft 110 includes a rod 111 and an end 112, the support plate 120 is disposed on the rod 111 and extends from one axial end of the rod 111 to the other axial end, the end 112 is connected to both axial ends of the rod 111 and extends outward away from the rod 111 along the axial direction, a radial dimension of the end 112 is greater than a radial dimension of the rod 111, the end 112 is used for fixing the bus bar base 200, and the bus bar base 200 is disposed on a radial outer side of the end 112.

The support plate 120 extends in a circumferential direction and a circumferential direction of the center shaft 110, the support plate 120 is movable in a first position and a second position in a radial direction of the center shaft 110, a radially outer side surface of the support plate 120 is flush with a radially outer side surface of the junction block base 200 when the support plate 120 is in the first position, the radially outer side surface of the support plate 120 is flush with a radially outer side surface of the end portion 112 when the support plate 120 is in the second position, the support plate 120 includes three pieces arranged at intervals in the circumferential direction of the center shaft 110, and the support plate 120 extends in an arc in the circumferential direction of the center shaft 110.

The driving member 130 is connected between the central shaft 110 and the support plate 120, and the height of the driving member 130 in the radial direction of the central shaft 110 is adjustable, the driving member 130 includes a first rod 131 and a second rod 132 hinged to each other, one end of each of the first rod 131 and the second rod 132 is hinged to the central shaft 110, the other end is hinged to the support plate 120, the length direction of the driving member 130 is along the axial direction of the central shaft 110, and one end of the first rod 131 and one end of the second rod 132 are arranged at an interval in the circumferential direction of the central shaft 110.

Referring to fig. 1, first, the bus bar base 200 is sleeved on the end 112 of the winding needle 100, and then the support plate 120 is driven to the first position to start winding the pole piece to be wound. After winding, the support plate 120 is driven to the second position, so that the outer side surface of the support plate 120 in the radial direction of the central shaft 110 is flush with the outer side surface of the end part 112 in the radial direction, thus, the support plate 120 is separated from the pole piece formed by winding, the winding needle 100 is separated from the pole piece formed by winding, and finally, the winding needle 100 is taken out from one axial end of the pole piece formed by winding, at this time, the confluence piece base 200 serves as a support function to support the pole piece formed by winding, so that the confluence piece is stably embedded in the pole piece formed by winding.

According to the winding needle 100 of the present invention, by providing the support plate 120 movable between the first position and the second position along the radial direction of the central shaft 110, the winding needle 100 can be switched between a state of supporting the winding-formed pole piece and a state of being separated from the winding-formed pole piece, so that the winding needle 100 can be prevented from damaging the winding-formed pole piece during the extraction process.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A needle coil, comprising:

a central shaft;

the supporting plate extends along the circumferential direction and the axial direction of the central shaft, the supporting plate is movably arranged on the central shaft between a first position and a second position along the radial direction of the central shaft, the first position is located on the radial outer side of the second position, when the supporting plate is located at the first position, a pole piece to be wound is suitable for being wound on the supporting plate or the supporting plate is suitable for supporting a pole piece to be wound, and when the supporting plate is located at the second position, the supporting plate is suitable for being separated from the pole piece to be wound.

2. The needle of claim 1 wherein the central shaft comprises:

the supporting plate is arranged on the rod part and extends from one axial end of the rod part to the other axial end of the rod part;

the end part is connected with at least one axial end of the rod part and is far away from the rod part in the axial direction to extend outwards, and the radial size of the end part is larger than that of the rod part.

3. The needle of claim 2 wherein said end is connected to both axial ends of said shaft, said shaft and said end are cylindrical, and said shaft and said end are coaxially disposed.

4. The needle of claim 2 wherein the radially outer surface of the support plate is radially outward of the outer peripheral surface of the end portion when the support plate is in the first position; when the support plate is in the second position, a radially outer surface of the support plate is flush with the outer peripheral surface of the end portion, or the radially outer surface of the support plate is located radially inward of the outer peripheral surface of the end portion.

5. The winding needle according to claim 2, wherein the winding needle is configured to wind a pole piece, the end portion is configured to fix a bus bar base, the bus bar base is sleeved on a radial outer side of the end portion, when the support plate is located at the first position, a radial outer side surface of the support plate is flush with a radial outer side surface of the bus bar base, and the pole piece is wound on the bus bar base and the outer side surface of the support plate.

6. The needle assembly according to any one of claims 1 to 5, wherein the support plate includes a plurality of support plates arranged at intervals in a circumferential direction of the central shaft.

7. The winding needle according to claim 6, wherein the support plate includes three that are provided at regular intervals in the circumferential direction of the center shaft, and the support plate extends along a circular arc line in the circumferential direction of the center shaft.

8. The needle of any one of claims 1-5, further comprising: the driving piece is connected between the central shaft and the supporting plate, and the height of the driving piece in the radial direction of the central shaft is adjustable.

9. The needle of claim 8 wherein the drive member comprises: the first pole of mutual articulated and second pole, first pole with any one end in the second pole with the center pin is articulated and the other end with the backup pad is articulated to be connected.

10. The needle of claim 9 wherein the length of the drive member is in the axial direction of the central shaft, and wherein the first rod is spaced from the second rod by an end in the axial direction of the central shaft.