Rolling device for secondary batteries

Abstract

The present invention provides a roll press device for a secondary battery, which corrects an outer shape of a secondary battery, the roll press device including: a jig member including a bottom plate, and one or more correction frames provided on a top surface of the bottom plate and into which the secondary battery is inserted; a pressing member provided above the jig member to press the secondary battery inserted into each correction frame so that the outer shape of the secondary battery is corrected to be consistent with an outer shape of the correction frame, wherein the pressing member includes: a support configured to uniformly support an entire top surface of the secondary battery inserted into the correction frame, and to press the entire top surface of the secondary battery inserted into the correction frame with a uniform force by a transmitted force, thereby correcting the outer shape of the secondary battery; and a pressing piece configured to transmit the force so that the support presses the entire top surface of the secondary battery inserted into the correction frame with the uniform force.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2020-0021208, filed on February 20, 2020, which is hereby incorporated by reference herein in its entirety. Technical Field

[0003] The present invention relates to a rolling device for a secondary battery, and more particularly, to a rolling device for a secondary battery capable of minimizing the thickness of the secondary battery. Background Art

[0004] Generally speaking, unlike non-rechargeable primary batteries, secondary batteries are rechargeable and dischargeable. They are widely used in high-tech electronic fields such as mobile phones, laptop computers and camcorders.

[0005] Secondary batteries are classified into can-type secondary batteries in which an electrode assembly is built in a metal can and pouch-type secondary batteries in which an electrode assembly is built in a pouch.

[0006] This pouch-type secondary battery includes an electrode assembly, an electrode lead coupled to the electrode assembly, and a pouch that houses the electrode assembly with the front end of the electrode lead extended. The electrode assembly has a structure in which electrodes and separators are alternately stacked, and the pouch includes a housing for housing the electrode assembly and a sealing portion for sealing the housing.

[0007] Here, in the pouch-type secondary battery, an empty space is formed due to a gap between the electrode assembly and the receiving portion of the pouch, and thus, there is a problem that the thickness of the secondary battery increases due to the empty space between the electrode assembly and the receiving portion. Summary of the Invention

[0008] Technical issues

[0009] The present invention has been invented to solve the above-mentioned problems, and an object of the present invention is to provide a rolling device for a secondary battery, which can minimize the thickness of the secondary battery by removing the empty space between the electrode assembly and the receiving portion of the bag, and in particular, can uniformly roll the entire surface of the secondary battery, thereby uniformly adjusting the overall thickness of the secondary battery.

[0010] Technical Solution

[0011] In order to achieve the above-mentioned objectives, the present invention provides a rolling device for secondary batteries, which corrects the appearance of the secondary batteries, and the rolling device includes: a clamping member, which includes a base plate and one or more correction frames arranged on the top surface of the base plate and in which the secondary batteries are inserted; a pressing member, which is arranged above the clamping member to press the secondary batteries inserted into each correction frame so that the appearance of the secondary batteries is corrected to be consistent with the insertion space of the correction frame in which the secondary batteries are inserted, wherein the pressing member includes: a support member, which is configured to uniformly support the entire top surface of the secondary battery inserted into the correction frame and press the entire top surface of the secondary battery inserted into the correction frame with a uniform force by transmitting force, thereby correcting the appearance of the secondary battery; and a pressing member, which is configured to transmit force so that the support member presses the entire top surface of the secondary battery inserted into the correction frame with a uniform force.

[0012] The pressing member may be provided as a pressing roller, and the pressing roller may transmit force to the support member while moving from one side to the other side of the top surface of the support member.

[0013] The pressing member may further include a guide device configured to guide the pressing piece to move from one side to the other side of the top surface of the support piece.

[0014] The guiding device may include: a guide member having a guide hole formed from one side to the other side of the top surface of the support member; and a guide protrusion, which is provided on each of the two ends of the pressing member and is coupled to the guide hole of the guide member to move from one side to the other side of the top surface of the support member along the guide hole.

[0015] The support member can be moved in a vertical direction relative to the base plate by a lifting device.

[0016] The lifting device may be provided as a lifting rod provided on the top surface of the bottom plate and combined with the support member so that the support member can move in a vertical direction.

[0017] The lifting device may include a locking member provided on the lifting rod and configured to adjust a descending height of the support member while supporting the support member.

[0018] The locking member may be screw-coupled to a screw thread formed on an outer circumferential surface of the lifting rod to rise or fall along the lifting rod, thereby adjusting a lowered height of the support member.

[0019] The correction frame is detachably coupled to the base plate.

[0020] The correction frame may include an assembly frame, and the assembly frame may be coupled to the insertion space of the correction frame in which the secondary battery is inserted to reduce a size of the insertion space of the correction frame by a thickness of the assembly frame.

[0021] A plurality of assembly frames having different sizes may be provided, and the plurality of assembly frames having different sizes may be disposed in the insertion space of the correction frame to overlap with each other in such a manner that respective sizes decrease inwardly.

[0022] The plurality of assembly frames may have the same thickness.

[0023] Beneficial effects

[0024] The rolling device for a secondary battery according to the present invention may include a clamping member and a pressing member. The clamping member may include a base plate and a correction frame, and the pressing member may include a support member and a pressing member. Due to this feature, the free space between the electrode assembly and the pouch of the secondary battery can be minimized, thereby minimizing the increase in thickness of the secondary battery. In particular, the entire surface of the secondary battery can be uniformly pressed, resulting in a uniform thickness of the secondary battery as a whole.

[0025] In addition, in the rolling device for secondary batteries according to the present invention, the pressing member can be provided as a pressing roller. Due to this feature, the pressing roller can apply uniform force to the entire surface of the support member, and thus the support member can uniformly press the entire surface of the secondary battery.

[0026] In addition, in the rolling device for secondary batteries according to the present invention, the pressing member may further include a guide device. Due to this feature, the pressing piece can be stably moved from one side to the other side of the top surface of the support, thereby improving the convenience and efficiency of work.

[0027] In addition, in the rolling device for a secondary battery according to the present invention, the pressing member may further include a lifting device. Due to this feature, the support member can be vertically moved relative to the bottom plate to stably press the support member.

[0028] In addition, in the rolling device for secondary batteries according to the present invention, the lifting device may further include a locking member. Due to this feature, the lowering height of the support member can be adjusted, thereby preventing the secondary battery from being excessively rolled, thereby preventing deformation and damage to the secondary battery in advance.

[0029] In addition, in the rolling device for secondary batteries according to the present invention, the locking member can be screwed to the lifting rod of the lifting device. Due to this feature, the locking member can rise or fall along the lifting rod when rotating, thereby finely adjusting the lowering height of the support member.

[0030] Further, in the roller pressing apparatus for a secondary battery according to the present application, the correction frame can further include a plurality of assembly frames having different sizes. Due to this feature, secondary batteries having various sizes can be rolled, thereby improving the use efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a perspective view of a secondary battery according to the present application.

[0032] Figure 2 is an exploded perspective view of a roller pressing apparatus for a secondary battery according to a first embodiment of the present application.

[0033] Figure 3 is a front view of a roller pressing apparatus for a secondary battery according to the first embodiment of the present application.

[0034] Figure 4 is a sectional view of Figure 3 .

[0035] Figure 5 is a sectional view illustrating a use state of a roller pressing apparatus for a secondary battery according to the first embodiment of the present application.

[0036] Figure 6 is a perspective view of a roller pressing apparatus for a secondary battery according to a second embodiment of the present application.

[0037] Figure 7 is a sectional view of Figure 6 .

[0038] Figure 8 is a sectional view of a roller pressing apparatus for a secondary battery according to a third embodiment of the present application.

[0039] Figure 9 is a partial enlarged view of Figure 8 .

[0040] Figure 10 is a perspective view of a roller pressing apparatus for a secondary battery according to a fourth embodiment of the present application.

[0041] Figure 11 is a sectional view of Figure 10 .

[0042] Figure 12 is a sectional view of a roller pressing apparatus for a secondary battery according to a fifth embodiment of the present application. DETAILED DESCRIPTION

[0043] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in a manner that allows a person skilled in the art to easily implement the technical concepts of the present invention. However, the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. In the accompanying drawings, any content that is not necessary for describing the present invention will be omitted for clarity, and the same reference numerals in the drawings represent the same elements.

[0044] [Secondary Battery According to the Present Invention]

[0045] Reference Figure 1 The secondary battery 10 according to the present invention includes an electrode assembly 11 and a pouch 12 accommodating the electrode assembly. The pouch 12 includes an accommodating portion 12 a accommodating the electrode assembly 11 and a sealing portion 12 b sealing the accommodating portion 12 a.

[0046] The secondary battery 10 according to the present invention has a free space between the electrode assembly 11 and the receiving portion 12 a of the pouch 12 , thereby increasing the thickness.

[0047] To solve the above problems, the secondary battery according to the present invention may be rolled through a rolling process to remove or minimize the empty space between the electrode assembly 11 and the receiving portion 12a of the pouch 12. Here, a rolling device for a secondary battery according to the present invention is used.

[0048] That is, the rolling apparatus for a secondary battery according to the present invention can uniformly press the entire surface of the secondary battery to uniformly adjust the overall thickness of the secondary battery, thereby removing or minimizing an empty space between the electrode assembly 11 and the receiving portion 12 a of the pouch 12 .

[0049] Hereinafter, a rolling apparatus for a secondary battery according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0050] [Rolling device for secondary battery according to first embodiment of the present invention]

[0051] like Figures 2 to 5 As shown, a rolling device 100 for a secondary battery according to a first embodiment of the present invention is configured to roll a secondary battery to correct the outer shape of the secondary battery, and the rolling device 100 for a secondary battery includes: a clamping member 110 on which the secondary battery 10 is set, and a pressing member 120 that uniformly presses the entire top surface of the secondary battery 10 set on the clamping member 110.

[0052] fixture components

[0053] The jig member 110 includes a bottom plate 111 and one or more correction frames 112 disposed on a top surface of the bottom plate 111 to correct the outer shape of the secondary battery 10 .

[0054] The bottom plate 111 has a rectangular plate shape, and the correction frame 112 is provided on a top surface of the bottom plate 111 .

[0055] The correction frame 112 has a rectangular frame shape, and a plurality of correction frames 112 are arranged at equal intervals on the top surface of the bottom plate 111. That is, the receiving portion 12a of the bag 12 is inserted into the insertion space formed in the center of the correction frame 12, and the sealing portion 12b of the bag 12 is supported on the outer peripheral surface of the upper portion of the correction frame 112.

[0056] The jig member 110 having such a structure can efficiently arrange the plurality of secondary batteries 10 .

[0057] Pressing member

[0058] The pressing member 120 is configured to press the secondary battery inserted into the clamp member, and includes: a support member 121, which uniformly supports the entire top surface of the secondary battery 10 inserted into the correction frame 112 and presses the entire top surface of the secondary battery 10 inserted into the correction frame 112 with a uniform force through the transmitted force, thereby correcting the appearance of the secondary battery 10; and a pressing member 122, which transmits force so that the support member presses the entire top surface of the secondary battery 10 inserted into the correction frame 112 with a uniform force.

[0059] The support member 121 has the same dimensions as the bottom plate 111 and is made of a transparent or translucent material. It is placed on the top surface of the correction frame 112 to support the top surface of the secondary battery 10 inserted into the correction frame 112. The support member 121 is formed as a flat, horizontal surface to uniformly support the entire top surface of the secondary battery 10. When force is applied to the support member 121 from the outside, the entire support member 121 is pressed toward the correction frame 112, thereby pressing the entire top surface of the secondary battery 10 with a uniform force. As a result, the receiving portion 12a of the pouch 12 can be rolled between the support member 121 and the bottom plate 111. The receiving portion 12a of the pouch 12 can come into close contact with the electrode assembly 11, eliminating any free space between them. At the same time, the receiving portion 12a of the pouch 12 can be deformed to the shape of the insertion space of the correction frame 112, thereby uniformly correcting the external shape of the secondary battery. In particular, while the accommodation portion 12 a of the pouch 12 is uniformly pressed, the overall thickness of the secondary battery 10 can be uniformly adjusted.

[0060] The pressing member 122 is provided as a roller that moves from one side to the other of the top surface of the support member 121 while rotating to transmit a force to press the support member 121. Here, the pressing member 122 can be provided to correspond to the length of the support member 121 in the width direction to press the close-contact portion of the support member 121 in close contact with the pressing member 122 in the width direction at the same time and transmit a uniform force to the entire support member 121 in the length direction while the pressing member moves in this state.

[0061] As described above, the pressing member 122 is in rolling contact with the surface of the support member to transmit a uniform force to the entire surface of the support member.

[0062] The pressing member 120 having the above configuration can uniformly press the entire surface of the secondary battery inserted into the correction frame 112 to uniformly adjust the overall thickness of the secondary battery 10 (see Figure 5 ).

[0063] Therefore, the roller pressing device 100 for a secondary battery according to the present application can remove the empty space between the pouch and the electrode assembly to minimize the increase in the thickness of the secondary battery to uniformly press the entire surface of the secondary battery so that the secondary battery has a uniform thickness.

[0064] Hereinafter, a pressing method of a secondary battery according to a first embodiment of the present application will be described.

[0065] First, the secondary battery 10 is disposed on the support member 110. That is, the secondary battery 10 is inserted into the insertion space of the correction frame 112 disposed on the bottom plate 111 of the support member 110. Then, the accommodation portion 12a of the pouch 12 included in the secondary battery 10 is inserted into the insertion space of the correction frame 112, and the sealing portion 12b of the pouch 12 is disposed on the top surface of the correction frame 112.

[0066] In this state, the secondary battery 10 placed on the support member 110 is pressed by the pressing member 120. That is, when the support 121 of the pressing member 120 is placed on the top surface of the correction frame 112, the entire top surface of the secondary battery 10 is supported on the bottom surface of the support 121. Next, the pressing member 122 of the pressing member 120 is placed on one side of the top surface of the support 121. Then, the pressing member 122 is pressed toward the support 121 and simultaneously moves toward the other side of the top surface of the support 121. Then, as the pressing member 122 moves, a uniform force is transmitted to the entire surface of the support 121, and the support 121 presses the entire surface of the secondary battery 10 with a uniform force through the transmitted force, thereby rolling the secondary battery 10. Here, the rolled secondary battery 10 can be deformed to conform to the insertion space of the correction frame 112 and simultaneously reduced in thickness. In particular, the receiving portion of the pouch and the electrode assembly may be in close contact with each other to remove a void space.

[0067] Hereinafter, in description of other embodiments of the present invention, the same constituent symbols as those of the above-described embodiment will be used for constituent symbols having the same functions, and repeated description will be omitted.

[0068] [Roll Pressing Device for Secondary Battery According to Second Embodiment of the Present Invention]

[0069] like Figure 6 and Figure 7 As shown, the rolling device 100 according to the second embodiment of the present invention includes a pressing member 120 , and the pressing member 120 includes a supporting member 121 and a pressing member 122 .

[0070] The pressing member 120 may further include a guide device that guides the pressing piece 122 to move uniformly from one side to the other side of the top surface of the support 121 , and the guide device may enable the pressing piece 122 to move more stably on the top surface of the support 121 .

[0071] For example, the guiding device includes: a guide member 123 having a guide hole 123a formed from one side of the top surface of the support member 121 to the other side; and a guide protrusion 122a, which is provided on each of the two ends of the pressing member 122 and is coupled to the guide hole 123a of the guide member 123 to move from one side of the top surface of the support member 121 to the other side along the guide hole 123a.

[0072] That is, the pressing member 122 can move uniformly from one side to the other side of the top surface of the support member 121 along the guide member 123, so that the pressing member 122 can always press the support member 121 with uniform force to uniformly correct the shape of the secondary battery rolled by the rolling device for secondary batteries.

[0073] [Roller pressing device for secondary battery according to third embodiment of the present invention]

[0074] As shown in Figure 8 and Figure 9 , a roller pressing device 100 for a secondary battery according to a third embodiment of the present invention includes a pressing member 120 including a support 121 and a pressing piece 122.

[0075] The support 121 is vertically moved in a vertical direction with respect to the bottom plate 111 by a lifting device.

[0076] That is, the lifting device is provided as a lifting rod 113 extending upward on a top surface of the bottom plate 111. Here, when viewed in Figure 8 , the support 121 is combined with the lifting rod 113 so that the support can be moved in the vertical direction. Accordingly, the lifting device can improve the combination between the support 121 and the bottom plate and prevent the support from moving in the front-rear direction and the left-right direction. In particular, the lifting device can move the support 121 in the vertical direction.

[0077] The lifting device includes a stopper 114 provided on the lifting rod 113 and adjusting the lowering height of the support 121 while supporting the support 121.

[0078] That is, when the lifting rod 113 is combined with the support 121, the support 121 can be lowered along the lifting rod 113 and then supported on the stopper 114. As a result, the support 121 no longer lowers, and thus, the lowering height of the support 121 can be limited.

[0079] In particular, the stopper 114 can be threadedly combined to a thread formed on an outer circumferential surface of the lifting rod to be raised or lowered along the lifting rod. Thus, the position of the stopper 114 can be easily adjusted, and in particular, the lowering height of the support can be more precisely adjusted.

[0080] [Roller pressing device for secondary battery according to fourth embodiment of the present invention]

[0081] As shown in Figure 10 and Figure 11 , a roller pressing device 100 for a secondary battery according to a fourth embodiment of the present invention includes a support member 110 including a bottom plate 111 and a correction frame 112.

[0082] Here, the correction frame 112 includes an assembly frame, and the assembly frame is coupled to the insertion space of the correction frame 112 into which the secondary battery 10 is inserted. Therefore, the size of the insertion space of the correction frame 112 can be reduced by the thickness of the assembly frame. As a result, secondary batteries 10 of various sizes can be inserted into the correction frame 112.

[0083] In particular, multiple assembly frames of different sizes may be provided. For example, three assembly frames 112a, 112b, and 112c of different sizes may be arranged overlapping each other in the insertion space of correction frame 112, with their respective sizes decreasing inwardly. This allows for more precise adjustment of the insertion space of correction frame 112.

[0084] The assembly frames having different sizes have the same thickness, so the area of ​​the inner space of the correction frame can be effectively calculated and adjusted according to the area of ​​the receiving portion of the bag.

[0085] [Roll Pressing Device for Secondary Battery According to Fifth Embodiment of the Invention]

[0086] like Figure 12 As shown, a rolling apparatus 100 for a secondary battery according to a fifth embodiment of the present invention includes a support member 110 including a bottom plate 111 and a correction frame 112 .

[0087] Here, the correction frame 112 is detachably coupled to the bottom plate 111. That is, a coupling protrusion 111a is formed on the bottom plate 111, and a coupling groove 112d coupled to the coupling protrusion 111a is formed in the correction frame 112.

[0088] Therefore, the correction frame may be attached to and detached from the bottom plate through the coupling protrusions 111 a and the coupling grooves 112 d .

[0089] Therefore, the scope of the present invention is defined by the appended claims rather than by the foregoing description and the exemplary embodiments described herein. Various modifications within the meaning of the equivalents of the claims and within the claims should be considered to be within the scope of the present invention.

[0090] [Explanation of Symbols]

[0091] 100: Rolling device for secondary batteries

[0092] 110: Fixture components

[0093] 111: Baseboard

[0094] 112: Correction Framework

[0095] 113: Lifting rod

[0096] 114: Locking piece

[0097] 120: Pressing component

[0098] 121: Support

[0099] 122: Pressing piece

[0100] 122a: Guide protrusion

[0101] 123: Guide

[0102] 123a: Guide hole.

Claims

1. A rolling device for a secondary battery, the rolling device correcting the shape of the secondary battery, the rolling device comprising: a jig member including a bottom plate, and one or more correction frames provided on a top surface of the bottom plate and into which the secondary battery is inserted; a pressing member provided above the jig member to press the secondary battery inserted into each correction frame so that the outer shape of the secondary battery is corrected to conform to an insertion space of the correction frame into which the secondary battery is inserted, Wherein, the pressing component includes: a support member configured to uniformly support the entire top surface of the secondary battery inserted into the correction frame and press the entire top surface of the secondary battery inserted into the correction frame with a uniform force by the transmitted force, thereby correcting the outer shape of the secondary battery; and a pressing member configured to transmit a force so that the support member presses the entire top surface of the secondary battery inserted into the correction frame with a uniform force, wherein the correction frame comprises an assembly frame, and The assembling frame is coupled to the insertion space of the correction frame in which the secondary battery is inserted to reduce a size of the insertion space of the correction frame by a thickness of the assembling frame.

2. The roller pressing device according to claim 1, wherein the pressing member is configured as a pressing roller, and The pressing roller transmits a force to the support member while moving from one side to the other side of the top surface of the support member. 3 . The rolling device according to claim 1 , wherein the pressing member further comprises a guide device configured to guide the pressing piece to move from one side to the other side of the top surface of the support piece.

4. The rolling device according to claim 3, wherein the guiding device comprises: a guide member having a guide hole formed from one side to the other side of the top surface of the support member; and a guide protrusion provided on each of both ends of the pressing member and coupled to the guide hole of the guide member to move from one side to the other side of the top surface of the support member along the guide hole. 5 . The rolling device according to claim 1 , wherein the support member is movable in a vertical direction relative to the bottom plate by a lifting device. 6 . The rolling device according to claim 5 , wherein the lifting device is configured as a lifting rod provided on the top surface of the bottom plate and combined with the support member so that the support member can move in a vertical direction. 7 . The rolling device according to claim 6 , wherein the lifting device comprises a stopper provided on the lifting rod and configured to adjust a descending height of the support member while supporting the support member. 8 . The rolling device according to claim 7 , wherein the locking member is threadedly coupled to a thread formed on an outer circumferential surface of the lifting rod to rise or fall along the lifting rod, thereby adjusting a descending height of the support member. 9 . The rolling device according to claim 1 , wherein the correction frame is detachably coupled to the bottom plate.

10. The rolling device according to claim 1, wherein a plurality of assembly frames having different sizes are provided, and The plurality of assembly frames having different sizes are disposed in the insertion space of the correction frame so as to overlap with each other in such a manner that respective sizes decrease inwardly. The rolling device according to claim 10 , wherein the plurality of assembly frames have the same thickness.

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