Cell Winding Device and Battery Production Line

Abstract

The present invention provides a core winding device and a battery production line. The core winding device includes: a frame; a swing mechanism rotatably arranged on the frame; a first driving mechanism arranged on the frame, and the first driving mechanism drives the swing mechanism to swing reciprocally in the clockwise and counterclockwise directions; a plurality of winding needles arranged at intervals in the circumferential direction on the swing mechanism, the winding needles are rotatable relative to the swing mechanism, and the winding needles have an extended position and a retracted position relative to the swing mechanism; a second driving mechanism and a third driving mechanism arranged on the swing mechanism, the second driving mechanism drives the winding needles to rotate, and the third driving mechanism drives the winding needles to move between the extended position and the retracted position. The above structure replaces the continuous circumferential rotation of the winding head in the prior art through the reciprocal swing of the swing mechanism. Therefore, the circuits of the second driving mechanism and the third driving mechanism will not be wound, and thus there is no need to arrange a slip ring on the frame, which simplifies the structure of the core winding device and reduces the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and in particular to a battery core winding device and a battery production line. Background Art

[0002] Winding machines are commonly used in battery production. Through the rotation of winding needles, the stacked sheets are wound on the winding needles to form a battery cell structure. In order to improve production efficiency, the winding machine in the prior art is provided with a winding head, and multiple winding needles are arranged circumferentially on the winding head. The winding head can drive the multiple winding needles to make circular motion, so that the winding and unloading can be carried out synchronously, thereby speeding up the production rhythm.

[0003] However, in the winding machine in the prior art, the winding head drives the winding needle to make continuous circular rotation, so the motors on the winding head also rotate around the winding head. In order to prevent the line from being entangled, a conductive slip ring needs to be provided at the winding head, which makes the winding machine structure complicated and increases the cost. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that an electric slip ring needs to be provided at the winding head of the winding machine in the prior art, which leads to a complex structure of the winding machine and increases the cost, thereby providing a battery cell winding device and a battery production line.

[0005] In order to solve the above problems, the present invention provides a battery cell winding device, comprising: a frame; a swing mechanism rotatably disposed on the frame; a first drive mechanism disposed on the frame, the first drive mechanism drives the swing mechanism to swing back and forth clockwise and counterclockwise; a plurality of winding needles disposed on the swing mechanism at circumferential intervals, the winding needles are rotatable relative to the swing mechanism, and the winding needles have an extended position and a retracted position relative to the swing mechanism.

[0006] Optionally, the first driving mechanism includes a first motor, and the first motor is connected to the swing mechanism through a gear mechanism.

[0007] Optionally, the battery core winding device further comprises a second driving mechanism and a third driving mechanism, the second driving mechanism and the third driving mechanism are arranged on the swing mechanism, the second driving mechanism drives the winding needle to rotate, and the third driving mechanism drives the winding needle to move between the extended position and the retracted position.

[0008] Optionally, the winding needle includes a needle body and a transmission seat, the second driving mechanism includes a second motor, and the battery cell winding device also includes a transmission shaft, and both ends of the transmission shaft are respectively connected to the motor shaft of the second motor and the transmission seat.

[0009] Optionally, the third driving mechanism includes a third motor, the third motor and the transmission seat are transmission connected via a screw-nut mechanism, and the motor shaft of the third motor is connected to the screw of the screw-nut mechanism.

[0010] Optionally, the battery cell winding device further includes a drag chain, and the circuits of the second driving mechanism and the third driving mechanism are led out through the drag chain.

[0011] Optionally, the winding needle includes a material clamping structure, and the material clamping structure is adapted to clamp the separator.

[0012] Optionally, the battery cell winding device further includes a material pushing structure, which is arranged on the rack and is adapted to push the separator and move the separator to the material clamping structure.

[0013] Optionally, the battery cell winding device further includes a material pressing structure, which is arranged on the rack and is adapted to press the separator onto the winding needle.

[0014] Optionally, the battery cell winding device further includes a material cutting structure, which is arranged on the rack and is adapted to cut the separator.

[0015] Optionally, the battery cell winding device further includes a blanking mechanism, which is adapted to separate the wound battery cell from the winding needle.

[0016] The present invention also provides a battery production line, including the above-mentioned battery cell winding device.

[0017] The present invention has the following advantages:

[0018] By using the technical solution of the present invention, the first driving mechanism can drive the swing mechanism to swing reciprocally clockwise and counterclockwise. Therefore, when winding the battery cell, different winding needles can be reciprocally switched to the winding station. At the same time, during the reciprocating movement of the swing mechanism, the winding needle can first be in the retracted position to avoid the separator, and then the winding needle is in the extended position. Then the swing mechanism rotates in the reverse direction, so that the winding needle tensions the separator, thereby ensuring that each winding needle can tension the separator when winding. The above structure replaces the continuous circular rotation of the winding head in the prior art through the reciprocating swing of the swing mechanism. Therefore, the circuit of the motor (or other driving mechanism) located on the swing mechanism will not be wound, and thus there is no need to set up a slip ring on the rack, simplifying the structure of the battery cell winding device and reducing the cost. Therefore, the technical solution of the present invention solves the defect that a slip ring needs to be set at the winding head of the winding machine in the prior art, resulting in a complex structure of the winding machine and an increase in cost. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Shows a schematic structural diagram of the battery cell winding device of the present invention;

[0021] Figure 2 Shows Figure 1 The enlarged schematic diagram at position A in

[0022] Figure 3 Shows Figure 1 The schematic diagram of the back structure of the battery cell winding device in

[0023] Figure 4 Shows Figure 1 The side view schematic diagram of the battery cell winding device in

[0024] Figure 5 Shows Figure 1 The schematic diagram of Action 1 when the battery cell winding device winds the battery cell in

[0025] Figure 6 Shows Figure 1 The schematic diagram of Action 2 when the battery cell winding device winds the battery cell in

[0026] Figure 7 Shows Figure 1 The schematic diagram of Action 3 when the battery cell winding device winds the battery cell in

[0027] Figure 8 Shows Figure 1 The schematic diagram of Action 4 when the battery cell winding device winds the battery cell in; and

[0028] Figure 9 Shows Figure 1 The schematic diagram of Action 5 when the battery cell winding device winds the battery cell in.

[0029] Explanation of reference numerals:

[0030] 10, frame; 20, swing mechanism; 30, first driving mechanism; 40, winding needle; 41, needle body; 42, transmission seat; 43, material clamping structure; 50, second driving mechanism; 60, third driving mechanism; 70, transmission shaft; 80, lead screw; 90, drag chain; 100, material pushing structure; 110, material pressing structure; 120, material cutting structure; 130, blanking mechanism. Detailed implementation manners

[0031] Next, the technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] As Figures 1 to 3 shown, the battery cell winding device of this embodiment includes a frame 10, a swing mechanism 20, a first driving mechanism 30, a plurality of winding needles 40, a second driving mechanism 50, and a third driving mechanism 60. Among them, the swing mechanism 20 is rotatably arranged on the frame 10. The first driving mechanism 30 is arranged on the frame 10, and the first driving mechanism 30 drives the swing mechanism 20 to swing reciprocally clockwise and counterclockwise. The plurality of winding needles 40 are circumferentially spaced on the swing mechanism 20. The winding needles 40 are rotatable relative to the swing mechanism 20, and the winding needles 40 have an extended position and a retracted position relative to the swing mechanism 20. The second driving mechanism 50 and the third driving mechanism 60 are arranged on the swing mechanism 20. The second driving mechanism 50 drives the winding needles 40 to rotate, and the third driving mechanism 60 drives the winding needles 40 to move between the extended position and the retracted position.

[0036] With the technical solution of this embodiment, the first driving mechanism 30 can drive the swing mechanism 20 to swing back and forth clockwise and counterclockwise. Therefore, when winding the battery cell, different winding needles 40 can be reciprocally switched to the winding station. At the same time, during the reciprocating movement of the swing mechanism 20, the winding needle 40 can first be in the retracted position to avoid the diaphragm, and then the winding needle is in the extended position. Then, the swing mechanism 20 rotates in the reverse direction, so that the winding needle 40 tensions the diaphragm, thereby ensuring that each winding needle 40 can tension the diaphragm when winding. The above structure replaces the continuous circular rotation of the winding head in the prior art through the reciprocating swing of the swing mechanism 20. Therefore, the circuits of the second driving mechanism 50 and the third driving mechanism 60 will not be wound, and thus there is no need to set up a conductive slip ring on the frame 10, which simplifies the structure of the battery cell winding device and reduces the cost. Therefore, the technical solution of this embodiment solves the defect that a conductive slip ring needs to be provided at the winding head of the winding machine in the prior art, resulting in a complex structure of the winding machine and an increase in cost.

[0037] Further, the swing mechanism 20 in this embodiment is a circular plate, and the swing mechanism 20 can swing around its central axis. In this embodiment, the swing mechanism 20 does not perform circular motion, but performs reciprocating movement clockwise and counterclockwise. Therefore, the circuits of the second driving mechanism 50 and the third driving mechanism 60 provided on the swing mechanism 20 will not be wound, and thus there is no need to set up a conductive slip ring.

[0038] Of course, those skilled in the art can adaptively adjust the shape of the swing mechanism 20 according to actual working needs.

[0039] Further, two winding needles 40 are provided in this embodiment, and the two winding needles 40 are arranged at an angle of 180° in the circumferential direction. Therefore, the winding needles 40 wind the battery cell at the upper side position of the frame 10 (hereinafter referred to as the winding position).

[0040] For the winding needle 40, it performs three actions. The first is the revolution movement around the central axis of the swing mechanism 20 (driven by the first driving mechanism 30), the second is the rotation movement around the central axis of the winding needle 40 (driven by the second driving mechanism 50), and the third is the linear movement along the direction perpendicular to the swing mechanism 20 (driven by the third driving mechanism 60).

[0041] Among them, the revolution movement of the winding needle 40 realizes the switching of the two winding needles 40 at the winding position. The rotation movement of the winding needle 40 enables the winding needle 40 to wind the diaphragm and form a battery cell. The linear movement of the winding needle 40 enables the swing mechanism 20 to be in the Figure 1 counterclockwise direction of rotation, the winding needle 40 can be in the retracted position to avoid the diaphragm, and after the winding needle 40 moves to the left side of the diaphragm, the winding needle 40 is in the extended position, and the swing mechanism 20 is along the Figure 1The winding needle 40 rotates clockwise and tightens the membrane. The linear movement of the winding needle 40 is an adaptive design that improves the continuous circular movement of the winding head in the prior art to the reciprocating swing of the swing mechanism 20 in this embodiment.

[0042] like Figure 3 As shown, in the technical solution of this embodiment, the first driving mechanism 30 includes a first motor, and the first motor is connected to the swing mechanism 20 through a gear mechanism. Specifically, the motor shaft of the first motor is provided with a gear, and the swing mechanism 20 includes a gear plate, and the gear and the gear plate are meshed, thereby playing a role in driving the swing mechanism 20 to swing as a whole.

[0043] Preferably, the first driving mechanism 30 can be selected as a servo motor. By controlling the forward and reverse rotation of the motor shaft of the servo motor, the clockwise and counterclockwise swings of the swing mechanism 20 are achieved.

[0044] like Figure 4 As shown, in the technical solution of this embodiment, the winding needle 40 includes a needle body 41 and a transmission seat 42. The second driving mechanism 50 includes a second motor, and the battery cell winding device also includes a transmission shaft 70, and the two ends of the transmission shaft 70 are respectively connected to the motor shaft of the second motor and the transmission seat 42. Specifically, when the second motor is running, it can drive the transmission shaft 70 to rotate, thereby driving the transmission seat 42 to rotate, and driving the needle body 41 to rotate. Furthermore, a reducer can be set between the motor shaft of the second motor and the transmission shaft 70 to control the winding speed of the needle body 41.

[0045] like Figure 4 As shown, in the technical solution of this embodiment, the third driving mechanism 60 includes a third motor, and the third motor and the transmission seat 42 are connected through a screw nut mechanism, and the motor shaft of the third motor is connected to the screw 80 of the screw nut mechanism. Specifically, the screw nut structure can convert the rotation of the motor shaft of the third motor into the linear movement of the transmission seat 42, and by controlling the forward and reverse rotation of the screw 80, the winding needle 40 can be controlled to move between the retracted position and the extended position as a whole.

[0046] Of course, the third driving mechanism 60 may also be selected as other commonly used linear driving mechanisms, such as a linear cylinder, a gear rack mechanism, and the like.

[0047] like Figure 3 As shown, in the technical solution of this embodiment, the battery winding device further includes a drag chain 90, and the lines of the second drive mechanism 50 and the third drive mechanism 60 are led out through the drag chain 90. Specifically, the drag chain 90 can protect the lines of the second motor and the third motor during the swinging of the swing mechanism 20, and prevent the lines from bending or colliding with other structures.

[0048] likeFigure 2 As shown, in the technical solution of this embodiment, the winding needle 40 includes a material clamping structure 43, and the material clamping structure 43 is adapted to clamp the diaphragm. Specifically, from Figure 2 it can be seen that a notch is provided on the side wall of the needle body 41 of the winding needle 40, and the material clamping structure 43 is a claw provided in the notch. The claw can hold the diaphragm in the notch, so that when the winding needle 40 rotates, the diaphragm can be wound.

[0049] As Figure 2 shown, in the technical solution of this embodiment, the battery cell winding device further includes a material pushing structure 100. The material pushing structure 100 is arranged on the frame 10, and the material pushing structure 100 is adapted to push the diaphragm and move the diaphragm to the material clamping structure 43. Specifically, the material pushing structure 100 can move along a straight line and push the diaphragm into the above-mentioned notch, so that the claw can clamp the diaphragm.

[0050] As Figure 2 shown, in the technical solution of this embodiment, the battery cell winding device further includes a material pressing structure 110. The material pressing structure 110 is arranged on the frame 10, and the material pressing structure 110 is adapted to press the diaphragm tightly onto the winding needle 40. And from Figure 2 it can be seen that the material pressing structure 110 is located above the material pushing structure 100.

[0051] As Figure 2 shown, in the technical solution of this embodiment, the battery cell winding device further includes a material cutting structure 120. The material cutting structure 120 is arranged on the frame 10, and the material cutting structure 120 is adapted to cut off the diaphragm. And from Figure 2 it can be seen that the material cutting structure 120 is located below the material pushing structure 100.

[0052] In this embodiment, the material pushing structure 100, the material pressing structure 110 and the material cutting structure 120 are arranged at the same place and cooperate with each other. The specific cooperation process of the three is as follows:

[0053] After the winding needle 40 tensions the diaphragm, the material pressing structure 110 presses the diaphragm tightly on the side wall of the winding needle 40, then the material cutting structure 120 cuts off the diaphragm, and finally the material pushing structure 100 pushes the diaphragm into the notch on the side wall of the winding needle 40. The material clamping structure 43 holds the diaphragm, and at this time the winding needle 40 starts to rotate and winds the diaphragm into a battery cell.

[0054] As Figure 4 shown, in the technical solution of this embodiment, the battery cell winding device further includes a blanking mechanism 130. The blanking mechanism 130 is adapted to separate the wound battery cell from the winding needle 40. Specifically, when the battery cell winding is completed, the blanking mechanism 130 can remove the battery cell from the winding needle 40, and the blanking mechanism 130 can be a structure such as a claw. At the same time, when blanking, the winding needle 40 can move from the extended position to the retracted position, so as to improve the blanking efficiency.

[0055] Combination Figure 1 Those skilled in the art can understand that, during production, one winding needle 40 in this embodiment is used for diaphragm winding, and the other is used for cell cutting.

[0056] According to the above description, the following combination Figures 5 to 9 , and the specific winding method of the battery cell winding device in this embodiment is described in detail. Figure 5 The winding needle in the middle upper part is the first winding needle, called Figure 5 The winding needle 40 in the middle lower part is the second winding needle.

[0057] 1. If Figure 5 As shown, in action 1, the first winding needle performs initial winding, and a battery cell is formed outside the first winding needle;

[0058] 2. If Figure 6 As shown, in action 2, the swing mechanism 20 rotates 180° clockwise, so that the first winding needle moves downward along the right side, and the second winding needle moves upward along the left side. At this time, the second winding needle tensions the diaphragm, the cutting structure 120 cuts the diaphragm, the second winding needle starts winding, and the first winding needle unwinds.

[0059] 3. If Figure 7 As shown, in action three, the second winding needle is wound and forms a battery core, and the swing mechanism 20 rotates counterclockwise at this time;

[0060] 4. If Figure 8 As shown, in action 4, the second winding needle moves downward along the left side, the first winding needle moves upward along the right side, and the first winding needle is in the retracted position. In action 4, the swing mechanism 20 needs to move slightly more than 180° counterclockwise, so that the first winding needle avoids the diaphragm and moves to the left side of the diaphragm;

[0061] 5. If Figure 9 As shown, in action five, the swing mechanism 20 rotates slightly clockwise, and the first winding needle is in the extended position, so that the first winding needle tensions the diaphragm, the cutting structure 120 cuts the diaphragm, the first winding needle starts winding, and the second winding needle unwinds.

[0062] Repeating the above steps 1 to 5 can realize the reciprocating swing type diaphragm winding method.

[0063] This example also provides a battery production line, including the above-mentioned battery cell winding device.

[0064] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A battery cell winding device, characterized in that, include: Frame (10); A swing mechanism (20) rotatably arranged on the frame (10); A first driving mechanism (30) is arranged on the frame (10), and the first driving mechanism (30) drives the swing mechanism (20) to swing back and forth in a clockwise and counterclockwise direction; a plurality of winding needles (40) are arranged on the swing mechanism (20) at intervals in the circumferential direction, and the winding needles (40) are rotatable relative to the swing mechanism (20), and the winding needles (40) have an extended position and a retracted position relative to the swing mechanism (20); a third driving mechanism (60) disposed on the swing mechanism (20), the third driving mechanism (60) driving the winding needle (40) to move between the extended position and the retracted position; The swing mechanism (20) can swing clockwise and counterclockwise to switch different winding needles (40) to the winding station. After the swing mechanism (20) swings clockwise and counterclockwise, it is located on the left side of the diaphragm. The winding needle (40) is in the retracted position to avoid the diaphragm at least during the counterclockwise swing. After the winding needle (40) swings to the winding station, the diaphragm is attached to the outer peripheral side of the winding needle (40) so that the winding needle (40) tensions the diaphragm.

2. The cell winding device according to claim 1, wherein The first driving mechanism (30) comprises a first motor, and the first motor is connected to the swing mechanism (20) via a gear mechanism.

3. The core winding device according to claim 1, wherein The battery core winding device further comprises a second driving mechanism (50), wherein the second driving mechanism (50) is arranged on the swing mechanism (20), and the second driving mechanism (50) drives the winding needle (40) to rotate.

4. The cell winding device according to claim 3, characterized in that, The winding needle (40) comprises a needle body (41) and a transmission seat (42), the second driving mechanism (50) comprises a second motor, and the battery cell winding device further comprises a transmission shaft (70), the two ends of the transmission shaft (70) are respectively connected to the motor shaft of the second motor and the transmission seat (42).

5. The cell winding device according to claim 4, characterized in that, The third driving mechanism (60) comprises a third motor, the third motor and the transmission seat (42) are connected in transmission via a screw-nut mechanism, and the motor shaft of the third motor is connected to the screw (80) of the screw-nut mechanism.

6. The core winding device according to any one of claims 3 to 5, characterized in that, The battery core winding device also includes a drag chain (90), and the lines of the second drive mechanism (50) and the third drive mechanism (60) are led out through the drag chain (90).

7. The core winding device according to any one of claims 1 to 5, characterized in that, The winding needle (40) comprises a clamping structure (43), and the clamping structure (43) is suitable for clamping the diaphragm.

8. The core winding device according to claim 7, characterized in that, The battery cell winding device further comprises a material pushing structure (100), wherein the material pushing structure (100) is arranged on the frame (10), and the material pushing structure (100) is suitable for pushing the diaphragm and moving the diaphragm to the clamping structure (43).

9. The core winding device according to any one of claims 1 to 5, characterized in that The battery cell winding device further comprises a material pressing structure (110), wherein the material pressing structure (110) is arranged on the frame (10), and the material pressing structure (110) is suitable for pressing the diaphragm onto the winding needle (40).

10. The core winding device according to any one of claims 1 to 5, characterized in that, The cell winding device further includes a cutting structure (120), the cutting structure (120) is arranged on the frame (10), and the cutting structure (120) is adapted to cut off the separator.

11. The core winding device according to any one of claims 1 to 5, characterized in that, The cell winding device further includes a blanking mechanism (130), and the blanking mechanism (130) is adapted to separate the wound cell from the winding needle (40).

12. A battery production line, characterized in that, Comprising the cell winding device according to any one of claims 1 to 11.

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