Diaphragm winding device

Abstract

The utility model discloses a diaphragm winding device, which is characterized by comprising a first moving part, a second moving part and a winding part, a frame mounted on the first moving part; the second moving part is mounted on the frame; and a separator winding unit for winding a separator, at least a partial region of which is fixed to the second moving unit, on an electrode assembly intermediate, the separator winding unit sandwiching the electrode assembly intermediate and rotating and lifting the electrode assembly intermediate.

Description

Technical Field

[0001] The utility model relates to a diaphragm winding device. Background Art

[0002] Generally, secondary batteries refer to batteries that can be used repeatedly through the discharge and reverse charging process of converting chemical energy into electrical energy. Types of secondary batteries include nickel-cadmium (Ni-Cd) batteries, nickel-metal hydride (Ni-MH) batteries, lithium metal batteries, lithium-ion (Ni-Ion) batteries, and lithium-ion polymer batteries (Li-Ion Polymer Battery, hereinafter referred to as LIPBs).

[0003] Secondary batteries consist of positive and negative plates, an electrolyte, and a separator. They utilize the voltage difference between the different positive and negative plate materials to store and generate electricity. Discharging refers to the movement of electrons from the high-voltage negative electrode to the low-voltage positive electrode (generating an amount of electricity equal to the voltage difference between the negative and positive electrodes). Charging involves the return of electrons from the positive electrode to the negative electrode, where the positive electrode material accepts the electrons and lithium ions and returns to its original metal oxide state. Specifically, when a secondary battery is charged, metal atoms move from the positive electrode to the negative electrode through the separator, causing the charging current to flow. Conversely, when a secondary battery is discharged, metal atoms move from the negative electrode to the positive electrode, causing the discharge current to flow.

[0004] On the other hand, when manufacturing such secondary batteries, positive and negative plates cut to size are alternately stacked to form an electrode assembly. A separator is placed between the positive and negative plates. After the positive and negative plates are stacked, the separator is wound around the intermediate electrode assembly. The wound separators are then joined and cut.

[0005] However, during the process of winding the separator around the electrode assembly intermediate body, the tension applied to the separator is not constant, resulting in permanent deformation of the separator. In addition, the inconsistency of the tension applied to the separator may cause excessive external force to be applied to the electrode assembly intermediate body. Utility Model Content

[0006] (1) Technical issues to be resolved

[0007] An embodiment of the utility model provides a diaphragm winding device that can prevent the diaphragm from being permanently deformed.

[0008] An embodiment of the present invention provides a diaphragm winding device that can reduce external force applied to an electrode assembly.

[0009] (2) Technical solution

[0010] According to an embodiment of the present invention, the diaphragm winding device may include: a first movable part, movably mounted on a guide component; a frame, mounted on the first movable part; a second movable part, mounted on the frame; and a diaphragm winding part, used to wind the diaphragm fixed with at least a portion of its area on the second movable part on an electrode assembly intermediate, and the diaphragm winding part can clamp the electrode assembly intermediate and rotate and lift the electrode assembly intermediate.

[0011] The first moving portion may include a first moving member movably mounted on the guide member and a first driving portion connected to the first moving member to transmit a driving force for moving the first moving member.

[0012] The first driving portion may include a linear motor.

[0013] The frame may include a base portion fixed to the first moving portion and a side wall portion extending upward from the base portion.

[0014] The base portion may have a plate shape, and the side wall portion may be provided at one end portion of the base portion.

[0015] The second moving portion may include a cylinder fixed to the frame and a mounting table connected to the cylinder and moving on the frame.

[0016] The diaphragm winding device may further include a fixing member provided on one side of the mounting table and fixing at least a partial area of ​​the diaphragm.

[0017] The fixing member may be provided at an extension portion extending from one side of the mounting table.

[0018] A moving speed of the first moving member in a section where the first moving portion moves may be greater than a moving speed of the mounting table in a section where the mounting table is moved by the air cylinder.

[0019] The tension applied to the diaphragm in a section in which the first guide portion moves may be smaller than the tension applied to the diaphragm in a section in which the mounting table moves.

[0020] A rotation speed of the electrode assembly intermediate body in a section in which the first moving portion moves may be faster than a rotation speed of the electrode assembly intermediate body in a section in which the mounting table moves.

[0021] An angle between a horizontal line passing through a point where the diaphragm is fixed by the fixing member and the diaphragm may be within 5°.

[0022] According to an embodiment of the present invention, the diaphragm winding device may include: a first moving part, movably mounted on a guide part; a frame, mounted on the first moving part; a second moving part, mounted on the frame; and a diaphragm winding part, used to wind the diaphragm, at least a portion of which is fixed on the second moving part, on an electrode assembly intermediate. The second moving part may include a cylinder fixed to the frame and a mounting table connected to the cylinder and movably mounted on the frame. The moving speed of the first moving part in the interval in which the first moving part moves may be greater than the moving speed of the mounting table in the interval in which the mounting table is moved by the cylinder.

[0023] In addition, the diaphragm winding device according to an embodiment of the present invention may include: a first movable part, movably mounted on a guide component; a frame, mounted on the first movable part; a second movable part, mounted on the frame; and a diaphragm winding part, used to wind the diaphragm, at least a portion of which is fixed on the second movable part, on an electrode assembly intermediate. The diaphragm winding part may include: a clamp, used to clamp the electrode assembly intermediate; a rotating drive part, connected to the clamp; and a lifting drive part, connected to the rotating drive part.

[0024] The rotation driving portion may include: a rotation shaft connected to the clamper; and a motor connected to the rotation shaft.

[0025] (3) Beneficial effects

[0026] The embodiments of the utility model have the effect of preventing the diaphragm from being permanently deformed.

[0027] The embodiments of the present invention have the effect of reducing the external force applied to the electrode assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is a diagram showing a configuration of a diaphragm winding device according to an embodiment of the present invention.

[0029] Figures 2 to 11 This is an explanatory diagram for explaining an operation of winding a separator around an electrode assembly intermediate body using a separator winding device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In the detailed description of the present invention, the terms or words used in the present specification and claims described below should not be interpreted as limited to their general meanings or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical ideas of the present disclosure based on the principle that the inventor can appropriately define the concepts of the terms in order to best illustrate the utility model itself. Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. At the time of filing this application, various equivalents and modifications that can replace them may exist.

[0031] The following describes preferred embodiments of the present invention with reference to the accompanying drawings. However, the embodiments of the present invention may be modified in a variety of ways, and the scope of the present invention is not limited to the embodiments described below. Furthermore, the embodiments of the present invention are provided to more fully illustrate the present invention to those skilled in the art. The shapes and dimensions of elements in the accompanying drawings may be exaggerated for clarity.

[0032] In addition, unless the context clearly indicates otherwise, expressions in the singular in the present specification include expressions in the plural, and the same reference numerals designate the same components or corresponding components throughout the specification.

[0033] In addition, it should be noted that in this specification, expressions such as upper side, upper part, lower side, lower part, side, front part, and rear part are expressed based on the directions shown in the drawings. If the direction of the corresponding object changes, it can be expressed in different ways.

[0034] Figure 1 1 is a diagram showing a configuration of a diaphragm winding device according to an embodiment of the present invention.

[0035] Reference Figure 1 The diaphragm winding device 100 according to an embodiment of the present invention may include a first moving portion 120 , a frame 140 , a second moving portion 160 and a diaphragm winding portion 180 .

[0036] The first moving portion 120 is movably mounted on the guide member 110. As an example, the guide member 110 may be an LM guide mounted on the device body (not shown). Alternatively, as an example, the first moving portion 120 may include a first moving member 122 that moves along the guide member 110 and a first driving portion 124 that transmits a driving force to the first moving member 122. Furthermore, the first driving portion 124 may include a linear motor that generates the driving force for moving the first moving member 122.

[0037] The frame 140 is fixedly mounted on the first moving member 122 of the first moving portion 120. Therefore, the frame 140 can move together with the first moving member 122. As an example, the second moving portion 160 can be mounted on the frame 140. In addition, the frame 140 may include a base portion 142 having a plate shape and a side wall portion 144 extending upward from the base portion 142.

[0038] The second movable portion 160 is mounted on the frame 140. As an example, the second movable portion 160 may include a cylinder 162 fixedly mounted on the sidewall 144 of the frame 140 and a mounting platform 164 connected to the piston 162a of the cylinder 162. Alternatively, the mounting platform 164 may be movably mounted on the base 142 of the frame 140. As an example, the base 142 of the frame 140 may be provided with a guide (not shown) to guide the movement of the mounting platform 164. The guide may be a groove or an LM guide. Furthermore, one end of the mounting platform 164 may be provided with an extension 164a, to which a clamping member 170 is mounted. The clamping member 170 may be provided at the end of the extension 164a. Alternatively, the clamping member 170 may include a first clamping member 172 for securing the diaphragm S and a second clamping member 174 for securing the diaphragm S together with the first clamping member 172.

[0039] On the other hand, after the first driving unit 124 completes the movement of the first moving member 122 , the cylinder 162 of the second moving unit 160 moves the mounting table 164 .

[0040] Here, a section in which the first driving unit 124 moves the first moving member 122 is defined as a first section M1 , and a section in which the cylinder 162 moves the mounting table 164 is defined as a second section M2 .

[0041] The separator winding unit 180 rotates and raises and lowers the electrode assembly intermediate body 10 to wind the separator S around it. The separator winding unit 180 may include a gripper 182 for gripping the electrode assembly intermediate body 10. The gripper 182 grips the electrode assembly intermediate body 10, rotating and lowering or raising the electrode assembly intermediate body 10 to wind the separator S around it. For example, when the separator winding unit 180 rotates and lowers the electrode assembly intermediate body 10, if the first moving member 122 of the first moving unit 120 moves toward the electrode assembly intermediate body 10, the separator S is wound around the electrode assembly intermediate body 10. Furthermore, since the separator winding unit 180 rotates and lowers the electrode assembly intermediate body 10, the tension applied to the separator S can be reduced.

[0042] To this end, the separator winding unit 180 may include a rotation drive unit (not shown) for rotating the electrode assembly intermediate body 10 and a lift drive unit (not shown) for raising and lowering the electrode assembly intermediate body 10. As an example, the rotation drive unit may include a rotating shaft (not shown) connected to the clamp 182 to rotate the clamp 182 and a motor (not shown) connected to the rotating shaft. The lift drive unit may include a lifting cylinder (not shown) connected to the rotating shaft to raise and lower the electrode assembly intermediate body 10. However, the rotation drive unit and the lift drive unit are not limited to the above configurations and may be modified to any configuration that can both raise and lower the electrode assembly intermediate body 10 and rotate it.

[0043] On the other hand, the driving force for moving the first moving member 122 in the first section M1 is smaller than the driving force for moving the mounting table 164 in the second section M2. Therefore, the tension applied to the diaphragm S is relatively smaller in the first section M1 than in the second section M2. Conversely, the rotation speed of the electrode assembly intermediate 10 in the first section M1 is faster than the rotation speed of the electrode assembly intermediate 10 in the second section M2. For this reason, the movement speed of the first moving member 122 disposed in the first moving portion 120 in the section M1 where the first moving portion 120 moves is greater than the movement speed of the mounting table 164 in the section M2 where the air cylinder 162 moves the mounting table 164.

[0044] Meanwhile, the electrode assembly intermediate body 10 rotates in a first rotational range R1 of 180° from 0° to 180° and in a second rotational range R2 of 180° from 180° to 360°. Furthermore, during the 360° rotations in the first and second rotational ranges R1, R2, the 180° rotation is accelerated in the first range M1 to shorten the time required to wind the separator S. This reduces the tension applied to the separator S, thereby reducing stretching of the separator S. Furthermore, in the second range M2, the separator S is wound around the electrode assembly intermediate body 10 with relatively greater pressure than in the first range M1, allowing the separator S to be tightly wound around the electrode assembly intermediate body 10.

[0045] As described above, since the separator winding unit 180 rotates and descends or ascends to wind the separator S on the electrode assembly intermediate body 10, the tension applied to the separator S can be reduced, and wrinkles can be prevented from occurring in the separator S. In this way, by reducing the tension applied to the separator S, the external force applied to the electrode assembly intermediate body 10 can be reduced.

[0046] Next, the operation of the separator winding device will be described with reference to the accompanying drawings.

[0047] Figures 2 to 11 This is an explanatory diagram for explaining an operation of winding a separator around an electrode assembly intermediate body using a separator winding device according to an embodiment of the present invention.

[0048] Reference Figure 2 The first moving member 122 of the first moving portion 120 moves along the guide member 110 mounted on the apparatus body (not shown). At this time, when the electrode assembly intermediate body 10 is lowered or raised and rotated by the separator winding unit 180, the separator S, one end of which is fixed to the fixing member 170 of the second moving portion 160, is wound around the electrode assembly intermediate body 10.

[0049] More specifically, when the separator S is not yet wound on the electrode assembly intermediate body 10, as shown in FIG. Figure 3 As shown, the diaphragm S is arranged to be fixed to the fixing member 170 (refer to Figure 2 ) coincides with the horizontal line L1 of point A1.

[0050] Afterwards, if Figure 4 As shown, the electrode assembly intermediate body 10 starts to rotate and descend by the separator winding portion 180. Thus, when the electrode assembly intermediate body 10 is rotated and descended by the separator winding portion 180, the separator S is arranged to be aligned with the separator S fixed to the fixing member 170 (refer to FIG. Figure 2 ) is substantially coincident with the horizontal line L1 of point A1. As an example, the fixing member 170 (refer to Figure 2 ) is used as a reference, and the angle between the horizontal line L1 and the diaphragm S is within about 5°. Therefore, the tension applied to the diaphragm S can be constant, and the tension applied to the diaphragm S can be reduced compared to the conventional method. That is, in the conventional method, the electrode assembly intermediate 10 is simply rotated to wind the diaphragm S on the electrode assembly intermediate 10, but in this case, the angle between the horizontal line L1 and the diaphragm S by the point A that fixes the diaphragm S gradually increases, and thus the tension applied to the diaphragm S gradually increases. However, when the electrode assembly intermediate 10 is rotated and lowered by the diaphragm winding portion 180, the diaphragm S is set to be aligned with the diaphragm S by the fixing member 170 (refer to Figure 2 ) roughly coincides with the horizontal line L1 of point A1, so the tension applied to the diaphragm S can be kept constant.

[0051] Afterwards, if Figure 5 As shown, the electrode assembly intermediate body 10 is continuously rotated and lowered by the separator winding part 180. Thus, when the electrode assembly intermediate body 10 is rotated and lowered by the separator winding part 180, the separator S is arranged to be fixed to the fixing member 170 (refer to FIG. Figure 2 ) roughly coincides with the horizontal line L1 of point A1.

[0052] Afterwards, if Figure 6As shown, until the electrode assembly intermediate body 10 rotates 90 degrees, the electrode assembly intermediate body 10 continues to rotate and continues to descend through the separator winding part 180. Therefore, the separator S can be set to be fixed to the fixing member 170 (refer to Figure 2 ) roughly coincides with the horizontal line L1 of point A1.

[0053] Afterwards, if Figure 7 As shown, when the electrode assembly intermediate body 10 continues to rotate, the electrode assembly intermediate body 10 rises compared to the state in which the electrode assembly intermediate body 10 rotates 90 degrees. Therefore, the separator S can be set to be fixed to the fixing member 170 (refer to Figure 2 ) roughly coincides with the horizontal line L1 of point A1.

[0054] Afterwards, if Figure 8 and Figure 9 As shown, the electrode assembly intermediate body 10 continues to rotate and rise, so that the separator S can be set to be fixed to the fixing member 170 (refer to Figure 2 ) roughly coincides with the horizontal line L1 of point A1.

[0055] Afterwards, if Figure 10 As shown, until the electrode assembly intermediate body 10 rotates 180 degrees, the electrode assembly intermediate body 10 continues to rotate and rises through the separator winding part 180. The separator S can be set to be fixed to the fixing member 170 (refer to Figure 2 ) roughly coincides with the horizontal line L1 of point A1.

[0056] Afterwards, if Figures 3 to 8 As shown, the electrode assembly intermediate body 10 continues to rotate and rise and fall. At this time, the first moving member 122 of the first moving portion 120 moves along the guide member 110 installed on the device body.

[0057] Afterwards, if Figure 11 As shown, the cylinder 162 of the second moving part 160 moves the mounting platform 164 of the second moving part 160, and the separator winding part 180 continues to rotate and rise the electrode assembly intermediate 10. Figure 11 In the state shown, the electrode assembly intermediate 10 and Figure 3 The state shown is a state rotated 360° compared to the state shown.

[0058] As described above, the separator winding unit 180 rotates and descends or ascends to wind the separator S around the electrode assembly intermediate body 10 , thereby reducing the tension applied to the separator S and preventing wrinkles from occurring in the separator S. Thus, by reducing the tension applied to the separator S, the external force applied to the electrode assembly intermediate body 10 can be reduced.

[0059] Although various embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto. It is obvious to those skilled in the art that various modifications and variations can be made without departing from the technical concept of the present invention as described in the claims. In addition, the present invention can be implemented by deleting some components of the above embodiments or by combining various embodiments.

Claims

1. A diaphragm winding device, characterized in that: include: a first moving portion movably mounted on the guide member; a frame mounted on the first moving part; a second moving portion mounted on the frame; as well as The diaphragm winding portion is used to wind the diaphragm whose at least a part is fixed to the second moving portion onto the electrode assembly intermediate body, The separator winding portion clamps the electrode assembly intermediate body and rotates and elevates the electrode assembly intermediate body.

2. The diaphragm winding device according to claim 1, characterized in that: The first moving portion includes a first moving member movably mounted on the guide member and a first driving portion connected to the first moving member to transmit a driving force for moving the first moving member.

3. The diaphragm winding device according to claim 2, characterized in that: The first driving unit includes a linear motor.

4. The diaphragm winding device according to any one of claims 1 to 3, characterized in that: The frame includes a base portion fixed to the first moving portion and a side wall portion extending upward from the base portion.

5. The diaphragm winding device according to claim 4, characterized in that: The base portion has a plate shape, The side wall portion is provided at one end portion of the base portion.

6. The diaphragm winding device according to any one of claims 1 to 3, characterized in that: The second moving part includes a cylinder fixed to the frame and a mounting table connected to the cylinder and moving on the frame.

7. The diaphragm winding device according to claim 6, characterized in that: Further including: The fixing component is provided on one side of the mounting platform and fixes at least a portion of the diaphragm.

8. The diaphragm winding device according to claim 7, characterized in that: The fixing member is provided on an extension portion extending from one side of the mounting table.

9. The diaphragm winding device according to claim 6, characterized in that: A moving speed of the first moving portion in a section in which the first moving portion moves is greater than a moving speed of the mounting table in a section in which the mounting table is moved by the air cylinder.

10. The diaphragm winding device according to claim 6, characterized in that: The tension applied to the diaphragm in a section in which the first guide portion moves is smaller than the tension applied to the diaphragm in a section in which the mounting table moves.

11. The diaphragm winding device according to claim 6, characterized in that: The rotation speed of the electrode assembly intermediate body in the section where the first moving portion moves is faster than the rotation speed of the electrode assembly intermediate body in the section where the mounting table moves.

12. The diaphragm winding device according to claim 7, characterized in that: The angle between the diaphragm and a horizontal line passing through the point where the diaphragm is fixed by the fixing member is within 5°.

13. A diaphragm winding device, characterized in that: include: a first moving portion movably mounted on the guide member; a frame mounted on the first moving part; a second moving portion, mounted on the frame; as well as The diaphragm winding portion is used to wind the diaphragm whose at least a part is fixed to the second moving portion onto the electrode assembly intermediate body, The second moving part includes a cylinder fixed to the frame and a mounting platform connected to the cylinder and movably mounted on the frame. A moving speed of the first moving member in a section where the first moving portion moves is greater than a moving speed of the mounting table in a section where the mounting table is moved by the air cylinder.

14. A diaphragm winding device, characterized in that: include: a first moving portion movably mounted on the guide member; a frame mounted on the first moving part; a second moving portion, mounted on the frame; as well as The diaphragm winding portion is used to wind the diaphragm whose at least a part is fixed to the second moving portion onto the electrode assembly intermediate body, The diaphragm winding portion includes: A clamper, used for clamping the electrode assembly intermediate; a rotation driving portion connected to the clamper; and The lifting drive unit is connected to the rotation drive unit.

15. The diaphragm winding device according to claim 14, characterized in that: The rotary drive unit includes: a rotating shaft connected to the holder; and A motor is connected to the rotating shaft.

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