阅读说明：本技术 一种锂电池卷针 (Lithium battery winding needle ) 是由 司圣科 于 2021-07-19 设计创作，主要内容包括：本发明公开了一种锂电池卷针,第一弧形柱体、第二弧形柱体、第三弧形柱体以及第四弧形柱体依次围合成圆柱形的中空腔室结构,第一弧形柱体和第二弧形柱体之间通过第一铰接点铰接,第二弧形柱体和第三弧形柱体之间通过第二铰接点铰接,第三弧形柱体和第四弧形柱体之间通过第三铰接点铰接,第四弧形柱体和第一弧形柱体之间通过第四铰接点铰接,圆柱形的中空腔室结构内设置有第一隔膜夹和第二隔膜夹。达到的技术效果为：通过本发明的一种锂电池卷针,能够解决现有技术中极片和隔膜绕在卷针上卷绕时涨力大小变化不易控制的问题,显著的提升了加工效率和质量,极大的降低了加工成本。(The invention discloses a lithium battery winding needle, which comprises a first arc-shaped cylinder body, a second arc-shaped cylinder body, a third arc-shaped cylinder body and a fourth arc-shaped cylinder body which are sequentially enclosed to form a cylindrical hollow cavity structure, wherein the first arc-shaped cylinder body is hinged with the second arc-shaped cylinder body through a first hinge point, the second arc-shaped cylinder body is hinged with the third arc-shaped cylinder body through a second hinge point, the third arc-shaped cylinder body is hinged with the fourth arc-shaped cylinder body through a third hinge point, the fourth arc-shaped cylinder body is hinged with the first arc-shaped cylinder body through a fourth hinge point, and a first diaphragm clamp and a second diaphragm clamp are arranged in the cylindrical hollow cavity structure. The technical effects achieved are as follows: the lithium battery winding needle provided by the invention can solve the problem that the change of the tension force is difficult to control when a pole piece and a diaphragm are wound on the winding needle in the prior art, remarkably improves the processing efficiency and quality, and greatly reduces the processing cost.)

1. A lithium battery winding needle is characterized by comprising a first arc-shaped cylinder (11), a second arc-shaped cylinder (12), a third arc-shaped cylinder (13), a fourth arc-shaped cylinder (14), a first hinge point (21), a second hinge point (22), a third hinge point (23), a fourth hinge point (24), a first diaphragm clamp (31) and a second diaphragm clamp (32); the first arc-shaped cylinder (11), the second arc-shaped cylinder (12), the third arc-shaped cylinder (13) and the fourth arc-shaped cylinder (14) are sequentially enclosed to form a cylindrical hollow cavity structure, the first arc-shaped cylinder (11) and the second arc-shaped cylinder (12) are hinged through the first hinge point (21), the second arc-shaped cylinder (12) and the third arc-shaped cylinder (13) are hinged through a second hinge point (22), the third arc-shaped column (13) and the fourth arc-shaped column (14) are hinged through a third hinge point (23), the fourth arc-shaped cylinder (14) is hinged with the first arc-shaped cylinder (11) through a fourth hinge point (24), the first diaphragm clamp (31) and the second diaphragm clamp (32) are arranged in the cylindrical hollow cavity structure.

2. The lithium battery winding pin according to claim 1, wherein the first diaphragm clamp (31) is fixed in the fourth arc-shaped cylinder (14), and the second diaphragm clamp (32) is fixed in the first arc-shaped cylinder (11).

3. The lithium battery winding needle according to claim 1, wherein the first arc-shaped cylinder (11), the second arc-shaped cylinder (12), the third arc-shaped cylinder (13) and the fourth arc-shaped cylinder (14) have the same arc radius, and the outer arc is a part of the outer circumferential side of the cylinder.

4. The lithium battery winding needle according to claim 1, wherein the second hinge point (22) is a first open hinge (22 a).

5. The lithium battery winding needle according to claim 4, wherein the fourth hinge point (24) is a second open hinge (24 a).

6. The lithium battery winding needle as claimed in claim 5, further comprising an elastic body (6), wherein the elastic body (6) is sleeved on the outer peripheral side of the whole enclosed by the first arc-shaped cylinder (11), the second arc-shaped cylinder (12), the third arc-shaped cylinder (13) and the fourth arc-shaped cylinder (14).

7. The lithium battery winding needle as claimed in claim 6, wherein the elastic body (6) is a ring-shaped tension spring or a rubber ring.

Technical Field

The invention relates to the technical field of lithium battery manufacturing, in particular to a lithium battery winding needle, and particularly relates to a winding needle of a square lithium battery winding machine.

Background

In the prior art, a winding needle in square lithium battery winding machine equipment is in a shuttle shape, and the change of the tension force when a pole piece and a diaphragm are wound on the winding needle is difficult to control, so that the efficiency and the quality are influenced.

Disclosure of Invention

Therefore, the invention provides a lithium battery winding needle to solve the problems in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

according to a first aspect of the invention, a lithium battery winding needle comprises a first arc-shaped cylinder, a second arc-shaped cylinder, a third arc-shaped cylinder, a fourth arc-shaped cylinder, a first hinge point, a second hinge point, a third hinge point, a fourth hinge point, a first diaphragm clamp and a second diaphragm clamp; the first arc cylinder, the second arc cylinder, the third arc cylinder and the fourth arc cylinder enclose into columniform well plenum chamber structure in proper order, the first arc cylinder with pass through between the second arc cylinder first pin joint is articulated, the second arc cylinder with pass through between the third arc cylinder the second pin joint is articulated, the third arc cylinder with pass through between the fourth arc cylinder the third pin joint is articulated, the fourth arc cylinder with pass through between the first arc cylinder the fourth pin joint is articulated, be provided with in the columniform well plenum chamber structure first diaphragm presss from both sides with the second diaphragm presss from both sides.

Further, during winding operation, a diaphragm is inserted between the first diaphragm clamp and the second diaphragm clamp.

Further, the first diaphragm clamp is fixed in the fourth arc-shaped cylinder, and the second diaphragm clamp is fixed in the first arc-shaped cylinder.

Further, the first arc cylinder, the second arc cylinder, the third arc cylinder and the fourth arc cylinder cambered surface radius is the same and the extrados is the partly of cylinder periphery side, in addition, the first arc cylinder, the second arc cylinder, the third arc cylinder and the fourth arc cylinder can also be other arbitrary structural style.

Further, the battery core is wound on the periphery of the whole surrounded by the first arc-shaped cylinder, the second arc-shaped cylinder, the third arc-shaped cylinder and the fourth arc-shaped cylinder.

Further, the second hinge point is a first open hinge.

Further, the fourth hinge point is a second open hinge.

Further, still include the elastomer, first arc cylinder, second arc cylinder, third arc cylinder and the whole periphery side cover that the fourth arc cylinder encloses is equipped with the elastomer.

Further, the elastomer is annular extension spring or rubber circle and other annular structure that have elasticity.

Furthermore, the first arc cylinder, the second arc cylinder, the third arc cylinder and the fourth arc cylinder enclose the chamber cross section in the synthetic columniform cavity structure in proper order and be equilateral quadrilateral.

Further, still include roll up needle handle and cylinder, first pin joint second pin joint, third pin joint point, fourth pin joint all are provided with the bracing piece, roll up the guide way that the needle handle seted up relative setting, wherein two that two diagonal angles set up the bracing piece slides respectively and inserts and establish in the guide way, the stiff end of cylinder is installed one of them on the bracing piece, cylinder telescopic link tip is installed one in addition on the bracing piece.

The invention has the following advantages: the lithium battery winding needle provided by the invention can solve the problem that the change of the tension force is difficult to control when a pole piece and a diaphragm are wound on the winding needle in the prior art, remarkably improves the processing efficiency and quality, and greatly reduces the processing cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a structural diagram of a winding pin of a lithium battery winding pin according to some embodiments of the present invention.

Fig. 2 is a diagram illustrating a position and a shape of a lithium battery winding pin in which a battery cell is wound around the winding pin according to some embodiments of the present invention.

Fig. 3 shows that two corresponding hinge points of the lithium battery winding needle provided by some embodiments of the present invention are stressed, the winding needle is deformed, and the battery cell is in a shuttle shape.

Fig. 4 is a front view of a deformed cell of a lithium battery winding needle according to some embodiments of the present invention.

Fig. 5 is an open hinge winding pin for a small-sized cell of a lithium battery winding pin according to some embodiments of the present invention.

Fig. 6 shows different internal chamber structures of a lithium battery winding needle according to some embodiments of the present invention.

Fig. 7 shows a configuration of a lithium battery winding needle when winding a battery cell according to some embodiments of the present invention (the cylinder retracts the winding needle to be circular).

Fig. 8 is a winding needle shape of a lithium battery winding needle according to some embodiments of the present invention when a deformed battery cell is taken out (a cylinder rod extends out of the winding needle and is in a non-circular shape).

In the figure: 11. the first arc cylinder, 12, the second arc cylinder, 13, the third arc cylinder, 14, the fourth arc cylinder, 21, first pin joint, 22, the second pin joint, 23, the third pin joint, 24, the fourth pin joint, 22a, first open hinge, 24a, the open hinge of second, 31, first diaphragm clamp, 32, the second diaphragm clamp, 4, electric core, 5, the diaphragm, 6, the elastomer, 7, the bracing piece, 8, the cylinder, 9, book needle handle, 10, the guide way.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, a lithium battery winding needle in an embodiment of a first aspect of the present invention includes a first arc-shaped cylinder 11, a second arc-shaped cylinder 12, a third arc-shaped cylinder 13, a fourth arc-shaped cylinder 14, a first hinge point 21, a second hinge point 22, a third hinge point 23, a fourth hinge point 24, a first diaphragm clamp 31, and a second diaphragm clamp 32; the first arc-shaped cylinder 11, the second arc-shaped cylinder 12, the third arc-shaped cylinder 13 and the fourth arc-shaped cylinder 14 sequentially enclose to form a cylindrical hollow cavity structure, the first arc-shaped cylinder 11 and the second arc-shaped cylinder 12 are hinged through a first hinge point 21, the second arc-shaped cylinder 12 and the third arc-shaped cylinder 13 are hinged through a second hinge point 22, the third arc-shaped cylinder 13 and the fourth arc-shaped cylinder 14 are hinged through a third hinge point 23, the fourth arc-shaped cylinder 14 and the first arc-shaped cylinder 11 are hinged through a fourth hinge point 24, and a first diaphragm clamp 31 and a second diaphragm clamp 32 are arranged in the cylindrical hollow cavity structure.

In the above embodiment, it should be noted that the arc radii of the first arc-shaped cylinder 11, the second arc-shaped cylinder 12, the third arc-shaped cylinder 13 and the fourth arc-shaped cylinder 14 are the same, they form part of the cylinder surface, the first hinge point 21, the second hinge point 22, the third hinge point 23 and the fourth hinge point 24 are closed hinges, and 22a and 24a are open hinges.

The technical effects achieved by the above embodiment are as follows: through the lithium battery winding needle of this embodiment, the problem that the tension size change is not easy to control when pole pieces and diaphragms are wound on the winding needle in the prior art can be solved, the machining efficiency and quality are remarkably improved, and the machining cost is greatly reduced.

Alternatively, as shown in fig. 1 to 5, in some embodiments, the first membrane clamp 31 and the second membrane clamp 32 are opened when the winding needle hinge points 22 and 24(22a and 24a) approach to the center of the circle during the winding operation, and the membrane 5 is inserted between the two; when the winding needle is circular, the first diaphragm clamp 31 and the second diaphragm clamp 32 clamp the diaphragm 5, the pole piece is inserted, and the winding needle starts to rotate.

Alternatively, as shown in fig. 1-5, in some embodiments, a first diaphragm clamp 31 is secured within the fourth curved cylinder 14 and a second diaphragm clamp 32 is secured within the first curved cylinder 11.

Alternatively, as shown in fig. 1 to 5, in some embodiments, the arc radii of the first arc-shaped cylinder 11, the second arc-shaped cylinder 12, the third arc-shaped cylinder 13 and the fourth arc-shaped cylinder 14 are the same, and the outer arc surface is a part of the outer circumferential side surface of the cylinder, and in addition, the first arc-shaped cylinder 11, the second arc-shaped cylinder 12, the third arc-shaped cylinder 13 and the fourth arc-shaped cylinder 14 can also be in any other structural forms.

Alternatively, as shown in fig. 1 to 5, in some embodiments, the battery cell 4 is wound around the entire outer circumferential side surrounded by the first arc-shaped cylinder 11, the second arc-shaped cylinder 12, the third arc-shaped cylinder 13, and the fourth arc-shaped cylinder 14.

In the above optional embodiment, it should be noted that the battery cell 4 is formed by stacking and winding a positive plate, a diaphragm, a negative plate, and a diaphragm of a battery.

Alternatively, as shown in fig. 1-5, in some embodiments, the second hinge point 22 is a first open hinge 22 a.

Alternatively, as shown in fig. 1-5, in some embodiments, the fourth hinge point 24 is a second open hinge 24 a.

Optionally, as shown in fig. 1 to 5, in some embodiments, the elastic body 6 is further included, and the elastic body 6 is sleeved on an outer peripheral side of a whole surrounded by the first arc-shaped cylinder 11, the second arc-shaped cylinder 12, the third arc-shaped cylinder 13, and the fourth arc-shaped cylinder 14.

Alternatively, as shown in fig. 1 to 5, in some embodiments, the elastic body 6 is a ring-shaped tension spring or rubber ring or other elastic ring-shaped structure.

Alternatively, as shown in fig. 1 to 5, in some embodiments, the first arc-shaped cylinder 11, the second arc-shaped cylinder 12, the third arc-shaped cylinder 13 and the fourth arc-shaped cylinder 14 sequentially enclose a cylindrical shape and are hollow chamber structures.

Optionally, the needle winding device further comprises a needle winding handle 9 and an air cylinder 8, the first hinge point 21, the second hinge point 22, the third hinge point 23 and the fourth hinge point 24 are all provided with support rods 7, the needle winding handle 9 is provided with guide grooves 10 which are oppositely arranged, wherein the two support rods 7 which are diagonally arranged are respectively inserted into the guide grooves 10 in a sliding manner, the fixed end of the air cylinder 8 is installed on one support rod 7, and the end part of the telescopic rod of the air cylinder 8 is installed on the other support rod 7.

The technical effects achieved by the above embodiment are as follows: through adopting the cylinder 8 drive, realized the coiling electric core of whole device and taken out electric core action.

The lithium battery winding needle can solve the problems in the background art, when a pole piece and a diaphragm 5 are wound on the winding needle, the winding needle is circular, the tension force is not fluctuated, and after the winding is finished, the winding needle is changed under the action of external force to change a battery cell into a shuttle shape; the lithium battery winding needle is formed by hinging four arc-shaped cylinders with equal radiuses; when the centers of the four arc surfaces of the first arc-shaped column body 11, the second arc-shaped column body 12, the third arc-shaped column body 13 and the fourth arc-shaped column body 14 are superposed, the winding needle is circular, and the wound battery core is also circular; under the action of external force, when two hinge points 23 and 21 corresponding to the winding needle are far away from the circle center (or one hinge point is far away from the circle center and the other hinge point is fixed), the other two hinge points 22 and 24(22a and 24a) are close to the circle center, so that the diameter direction of the battery core is elongated to be in a shuttle shape, and the battery core is taken down and shaped by a manipulator, thus the square battery is required.

The implementation manner of the above embodiment is as follows: the winding needle of fig. 1 is connected to a rotating shaft of a winding machine through a mechanism, the winding needle is concentric with the rotating shaft when being cylindrical, the mechanism enables a first hinge point 21 and a third hinge point 23 of a hinge point to leave the center of a circle, (or one of the hinge points is far away from and one of the hinge points is still), a second hinge point 22 and a fourth hinge point 24 are close to the center of a circle, simultaneously two membrane clamps 31 and 32 are opened, after a membrane 5 is inserted, the mechanism enables the first hinge point 21 and the third hinge point 23 of the hinge point to be close to the center of a circle, when the cambered surfaces of four first arc-shaped cylinders 11, second arc-shaped cylinders 12, third arc-shaped cylinders 13 and fourth arc-shaped cylinders 14 are concentric, the first membrane clamps 31 and the second membrane clamps 32 clamp the membrane 5, positive and negative pole pieces are inserted into the membrane 5, winding is started, the tension is unchanged, the winding speed can be high, and the quality of an electric core is good; the diaphragm is cut off when the winding is finished, the diaphragm 5 is fixed by the adhesive tape, and the round battery cell is wound; when the battery core is taken out, the mechanism enables the first hinge point 21 and the third hinge point 23 to leave the circle center, (or one of the first hinge point 21 and the third hinge point 23 is far away and one of the second hinge point 22 and the third hinge point 24 is still) to approach the circle center, meanwhile, the first diaphragm clamp 31 and the second diaphragm clamp 32 are opened, the battery core is changed into a shuttle shape by the winding needle, the inner circumference of the battery core is longer than the contact length of the winding needle and the battery core after the winding needle is deformed, and the mechanical arm can smoothly take out the battery core; the square battery is formed after shaping; fig. 5 shows a winding needle for winding a small square battery, and the first open hinge 22a and the second open hinge 24a are open hinges designed so that the closer to the center of the circle, the easier the battery cell can be taken out from the winding needle, and the annular elastic body 6 gives the force for opening and closing the open hinges without disengaging.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.