阅读说明：本技术 二次电池的密封装置和方法 (Sealing device and method for secondary battery ) 是由 郑桃花 朴燦基 权度延 金成焕 金澔荣 于 2020-03-27 设计创作，主要内容包括：根据本发明的密封从中引出电极引线的袋的密封部的二次电池的密封装置包括：下部密封工具,从中引出电极引线的袋的密封部被放置在下部密封工具上；和上部密封工具,上部密封工具配置为按压并密封被放置在下部密封工具上的从中引出电极引线的袋的密封部,其中下部密封工具包括：下部固定块,袋的引出电极引线的密封部被放置在下部固定块的顶表面上；和一个或多个下部可分离块,一个或多个下部可分离块可分离地结合至下部固定块,并且配置为支撑从中引出电极引线的袋的密封部中的没有设置电极引线的密封表面。(The sealing device of a secondary battery according to the present invention, which seals a sealing portion of a pouch from which an electrode lead is drawn, includes: a lower sealing tool on which a sealing portion of the pouch from which the electrode lead is drawn is placed; and an upper sealing tool configured to press and seal a sealing portion of a pouch from which the electrode lead is drawn, which is placed on the lower sealing tool, wherein the lower sealing tool includes: a lower fixing block on which a sealing part of the lead-out electrode of the pouch is placed on a top surface thereof; and one or more lower separable pieces detachably coupled to the lower fixed block and configured to support a sealing surface, where the electrode lead is not disposed, in the sealing part of the pouch, from which the electrode lead is drawn out.)

1. A sealing device of a secondary battery sealing a sealing portion of a pouch from which an electrode lead is drawn, the sealing device comprising:

a lower sealing tool on which a sealing portion of the pouch from which the electrode lead is drawn is placed; and

an upper sealing tool configured to press and seal a sealing portion of a pouch from which an electrode lead is drawn, which is placed on the lower sealing tool,

wherein the lower sealing tool comprises:

a lower fixing block on the top surface of which a sealing part of a pouch from which an electrode lead is drawn is placed; and

one or more lower separable pieces detachably coupled to the lower fixed block and configured to support a sealing surface, at which the electrode lead is not disposed, in the sealing part of the pouch from which the electrode lead is drawn out.

2. The sealing apparatus as set forth in claim 1, wherein the lower fixing block is provided with a plurality of first lower bonding portions on a top surface thereof in a length direction, and

each of the lower separable pieces is provided with a second lower bonding portion separably bonded to a first lower bonding portion corresponding to the sealing surface where no electrode lead is provided, among the plurality of first lower bonding portions.

3. The sealing device of claim 2, wherein the first lower bonding portion is provided as a bonding groove, and

the second lower coupling part is provided to be detachably coupled to the coupling protrusion of the coupling groove.

4. The sealing device of claim 2, wherein magnets are respectively disposed on the first and second lower joints so as to be attached to each other.

5. The sealing apparatus of claim 2, wherein the lower sealing tool further comprises a fastener configured to secure each of the lower separable pieces coupled to the lower securing block.

6. The sealing apparatus as claimed in claim 5, wherein both ends of the fixing member are supported on the lower fixing block and the lower separable block, respectively, corresponding to each other, to fix the lower fixing block and the lower separable block to each other.

7. The sealing apparatus as claimed in claim 6, wherein a fixing protrusion rotatably coupled to the lower fixing block is provided on one side of the fixing member, and

the fixing member is rotatable with respect to the fixing projection to a position to support the lower separable piece or a position to not support the lower separable piece.

8. The sealing device of claim 1, wherein the upper sealing tool comprises:

an upper fixing block configured to press a sealing part of a pouch, from which an electrode lead is drawn, on a bottom surface thereof; and is

One or more upper separable pieces detachably coupled to the upper fixed block and configured to press the sealing surface, where no electrode lead is disposed, in the sealing part of the pouch from which the electrode lead is drawn.

9. The sealing apparatus as set forth in claim 8, wherein the upper fixing block is provided with a plurality of first upper coupling portions on a bottom surface thereof in a length direction, and

each of the upper separable pieces is provided with a second upper bonding portion separably bonded to the first upper bonding portion corresponding to the sealing surface where no electrode lead is provided, among the plurality of first upper bonding portions.

10. The sealing device of claim 9, wherein the first upper bonding portion is provided as a bonding groove, and

the second upper bonding portion is provided to be separably bonded to the bonding protrusion of the bonding groove.

11. The sealing device of claim 1, wherein the lower sealing tool further comprises a lower extension block coupled to an end of the lower retention block to increase a length of the lower retention block, and

the upper sealing tool further includes an upper extension block coupled to an end of the upper fixing block to increase a length of the upper fixing block.

12. A sealing method of a secondary battery, comprising:

a lower sealing tool preparing step (S10) including: a lower fixing block preparation process of preparing a lower fixing block having a length corresponding to a length of a sealing portion of a pouch from which an electrode lead is drawn; and a lower separable block preparing process of bonding one or more lower separable blocks to a top surface of the lower fixed block corresponding to a sealing surface, where no electrode lead is disposed, in the sealing part of the pouch from which the electrode lead is drawn;

an upper sealing tool preparing step (S20) of positioning the upper sealing tool on an upper portion of the lower sealing tool;

a sealing part placing step (S30) of placing a sealing part of a pouch from which an electrode lead is drawn on a top surface of the lower sealing tool, wherein the sealing surface on which no electrode lead is provided is placed to be supported on the lower separable block; and

a sealing part sealing step (S40) of lowering the upper sealing tool toward the lower sealing tool to press and seal a sealing part of a pouch from which an electrode lead is drawn, which is placed on the lower sealing tool, wherein the sealing surface where the electrode lead is not provided is sealed while being pressed by the lower separable block and the upper sealing tool.

13. The sealing method as set forth in claim 12, wherein the lower sealing tool preparing step (S10) further comprises a lower extension block coupling process of coupling lower extension blocks to both ends of the lower fixing block to increase the length of the lower fixing block when the lower fixing block has a length less than that of the sealing portion of the pouch from which the electrode lead is drawn.

14. The sealing method as set forth in claim 13, wherein the lower sealing tool preparing step (S10) further includes a fixing member fixing process of fixing each of the lower fixing block and the lower separable piece to each other by using a fixing member after the lower fixing block and the lower separable piece are coupled to each other.

15. The sealing method according to claim 12, wherein the upper sealing tool preparing step (S20) includes: an upper fixing block preparation process of preparing an upper fixing block having a length corresponding to a length of a sealing portion of a pouch from which an electrode lead is drawn; and an upper separable block preparing process of bonding one or more upper separable blocks to a bottom surface of the upper fixed block corresponding to the sealing surface, where no electrode lead is disposed, in the sealing part of the pouch from which the electrode lead is drawn out.

Technical Field

Cross Reference to Related Applications

This application claims the benefit of priority from korean patent application No. 10-2019-0036137, filed on 28/3/2019, which is hereby incorporated by reference in its entirety.

Technical Field

The present invention relates to a sealing apparatus and method of a secondary battery, and more particularly, to a sealing apparatus and sealing method having an assemblable block structure.

Background

In general, a secondary battery (secondary battery) refers to a battery that can be charged and discharged, unlike a primary battery that is not chargeable. Secondary batteries are widely used in high-tech electronic fields such as mobile phones, notebook computers, and camcorders.

Such a secondary battery includes: an electrode assembly in which electrodes and separators are alternately laminated; and a pouch accommodating the electrode assembly. Further, the method of manufacturing a secondary battery includes: an electrode manufacturing step of manufacturing an electrode; an electrode assembly manufacturing process of alternately stacking electrodes and separators to manufacture an electrode assembly; an electrode lead bonding process of bonding an electrode lead to the electrode assembly; and a pouch sealing process of accommodating the electrode assembly in a pouch to seal an edge surface of the case in a state where the front ends of the electrode leads are drawn out to the outside.

Here, in the pouch sealing process, the edge surface of the pouch is sealed using a sealing apparatus including an upper tool and a lower tool.

However, the sealing means may stably seal the edge surface of the pouch, which does not have the electrode lead, but the sealing of the edge surface of the pouch, which has the electrode lead, is failed due to the drawn electrode lead.

In particular, the capacity of the secondary battery, the design of the secondary battery, the material of the electrode lead, and the width, thickness, and position of the electrode lead may vary according to the vendor. Therefore, there is a problem in that a new sealing device must be manufactured every time the width, thickness, and position of the electrode lead are changed.

Disclosure of Invention

Technical problem

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a sealing apparatus having a block structure capable of being assembled according to the width, thickness and position of an electrode lead, and thus being used compatibly regardless of the width, thickness and position of the electrode lead, thereby increasing the sealing force of a sealing part of a pouch provided with the electrode lead.

Technical scheme

To achieve the above object, the present invention provides a sealing device of a secondary battery sealing a sealing portion of a pouch from which an electrode lead is drawn, the sealing device including: a lower sealing tool on which a sealing portion of the pouch from which the electrode lead is drawn is placed; and an upper sealing tool configured to press and seal a sealing portion of a pouch from which an electrode lead is drawn, which is placed on the lower sealing tool, wherein the lower sealing tool includes: a lower fixing block on the top surface of which a sealing part of a pouch from which an electrode lead is drawn is placed; and one or more lower separable pieces detachably coupled to the lower fixed block and configured to support a sealing surface, where the electrode lead is not disposed, in the sealing part of the pouch, from which the electrode lead is drawn out.

The lower fixed block may be provided on a top surface thereof with a plurality of first lower bonding portions along a length direction, and each of the lower separable blocks may be provided with a second lower bonding portion separably bonded to a first lower bonding portion corresponding to the sealing surface where no electrode lead is disposed, among the plurality of first lower bonding portions.

The first lower coupling part may be provided as a coupling groove, and the second lower coupling part may be provided as a coupling protrusion detachably coupled to the coupling groove.

Magnets may be respectively provided on the first and second lower coupling parts so as to be attached to each other.

The lower sealing tool may further include a fixing member configured to fix each of the lower separable blocks coupled to the lower fixing block.

Both ends of the fixing member may be supported on the lower fixing block and the lower separable block, respectively, corresponding to each other, to fix the lower fixing block and the lower separable block to each other.

A fixing protrusion rotatably coupled to the lower fixing block may be provided on one side of the fixing member, and the fixing member may be rotatable with respect to the fixing protrusion to a position of supporting the lower separable block or a position of not supporting the lower separable block.

The upper sealing means may comprise: an upper fixing block configured to press a sealing part of a pouch, from which an electrode lead is drawn, on a bottom surface thereof; and one or more upper separable pieces detachably coupled to the upper fixed block and configured to press the sealing surface, where the electrode lead is not disposed, in the sealing part of the pouch, from which the electrode lead is drawn out.

The upper fixed block may be provided at a bottom surface thereof with a plurality of first upper coupling parts in a length direction, and each of the upper separable blocks is provided with a second upper coupling part which may be separably coupled to the first upper coupling part corresponding to the sealing surface where no electrode lead is provided, among the plurality of first upper coupling parts.

The first upper coupling part may be provided as a coupling groove, and the second upper coupling part may be provided as a coupling protrusion detachably coupled to the coupling groove.

The lower sealing tool may further include a lower extension block coupled to an end of the lower fixing block to increase the length of the lower fixing block, and the upper sealing tool may further include an upper extension block coupled to an end of the upper fixing block to increase the length of the upper fixing block.

A sealing method of a secondary battery according to the present invention includes: a lower sealing tool preparing step (S10) including: a lower fixing block preparation process of preparing a lower fixing block having a length corresponding to a length of a sealing portion of a pouch from which an electrode lead is drawn; and a lower separable block preparing process of bonding one or more lower separable blocks to a top surface of the lower fixed block corresponding to a sealing surface, where no electrode lead is disposed, in the sealing part of the pouch from which the electrode lead is drawn; an upper sealing tool preparing step (S20) of positioning the upper sealing tool on an upper portion of the lower sealing tool; a sealing part placing step (S30) of placing a sealing part of a pouch from which an electrode lead is drawn on a top surface of the lower sealing tool, wherein the sealing surface on which no electrode lead is provided is placed to be supported on the lower separable block; and a sealing part sealing step (S40) of lowering the upper sealing tool toward the lower sealing tool to press and seal a sealing part of a pouch from which an electrode lead is drawn, which is placed on the lower sealing tool, wherein the sealing surface where the electrode lead is not provided is sealed while being pressed by the lower separable block and the upper sealing tool.

The lower sealing tool preparing step (S10) may further include a lower extension block coupling process of coupling lower extension blocks to both ends of the lower fixing block to increase the length of the lower fixing block when the lower fixing block has a length less than that of a sealing portion of a pouch from which an electrode lead is drawn.

The lower sealing tool preparing step (S10) may further include a fixing member fixing process of fixing each of the lower fixing block and the lower separable block to each other by using a fixing member after the lower fixing block and the lower separable block are coupled to each other.

The upper sealing tool preparing step (S20) may include: an upper fixing block preparation process of preparing an upper fixing block having a length corresponding to a length of a sealing portion of a pouch from which an electrode lead is drawn; and an upper separable block preparing process of bonding one or more upper separable blocks to a bottom surface of the upper fixed block corresponding to the sealing surface, where no electrode lead is disposed, in the sealing part of the pouch from which the electrode lead is drawn out.

Advantageous effects

The sealing device of the secondary battery according to the present invention may include a lower sealing tool and an upper sealing tool. The lower sealing tool may include a lower fixed block and a lower separable block assembled in block form. Thus, the lower sealing tool may be assembled to match the position of the sealing portion of the pouch provided with the electrode lead. That is, the lower fixed block and the lower separable block can be assembled according to the shape of the sealing part of the pouch provided with the electrode lead, and thus can be used compatibly regardless of the width, thickness, and position of the electrode lead, thereby improving sealing force, particularly reducing cost and preventing the possibility of occurrence of mold errors.

Further, in the sealing device of a secondary battery according to the present invention, the lower fixed block and the lower separable block may be respectively provided with first and second lower coupling portions coupled to each other. Therefore, the coupling between the lower fixed block and the lower separable block can be improved.

Further, in the sealing device of the secondary battery according to the present invention, the lower fixed block and the lower separable block may be respectively provided with magnets to be attached to each other. Therefore, the coupling between the lower fixed block and the lower separable block can be improved, and especially, shaking can be prevented.

Further, in the sealing device of a secondary battery according to the present invention, the lower fixing block and the lower separable block may be fixed by a fixing member. Thus, the fixation between the lower fixed block and the lower separable block can be improved, and especially the shaking can be prevented.

Further, in the secondary battery sealing apparatus of the present invention, the upper sealing tool may include an upper fixing block and an upper separable block assembled in a block form. Thus, the upper sealing tool may be assembled to match the position of the sealing portion of the pouch provided with the electrode lead.

Drawings

Fig. 1 is an exploded perspective view of a sealing device of a secondary battery according to a first embodiment of the present invention.

Fig. 2 is an exploded perspective view illustrating a lower sealing tool of a sealing device of a secondary battery according to a first embodiment of the present invention.

Fig. 3 is a front view of fig. 1.

Fig. 4 is a sectional view taken along line a-a of fig. 3.

Fig. 5 is a front view illustrating a fixing member of a sealing device of a secondary battery according to a first embodiment of the present invention.

Fig. 6 is a sectional view showing a magnet of a sealing device of a secondary battery according to a first embodiment of the present invention.

Fig. 7 is an exploded perspective view illustrating an upper sealing tool of a sealing device of a secondary battery according to a first embodiment of the present invention.

Fig. 8 is an enlarged perspective view of the upper sealing tool of fig. 7.

Fig. 9 is a front view of fig. 7.

Fig. 10 is a flowchart illustrating a sealing method for a second battery according to a second embodiment of the present invention.

Fig. 11 is a perspective view showing a first example of a sealing device of a secondary battery according to a third embodiment of the present invention.

Fig. 12 is a perspective view showing a second example of a sealing device of a secondary battery according to a third embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in such a manner that those skilled in the art to which the present invention pertains can easily carry out the technical idea of the present invention. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, any unnecessary content for describing the invention will be omitted for clarity, and like reference numerals denote like elements in the drawings.

[ Secondary Battery according to the invention ]

Referring to fig. 1, a secondary battery according to the present invention includes: an electrode assembly 10, an electrode lead 20 coupled to the electrode assembly 10; and a pouch 30 accommodating the electrode assembly 10 in a state in which the front end of the electrode lead 20 is drawn out to the outside. The bag 30 includes: a receiving part 31 receiving the electrode assembly 10; and a sealing part 32 provided along an edge surface of the accommodating part 31 to seal the accommodating part 31. Here, the electrode lead 20 is drawn to the outside via one sealing part 32 of the sealing parts 32 provided on the edge surface of the receiving part 31.

The sealing portion 32 of the pouch 30 from which the electrode lead 20 is drawn includes: a lower protruding surface 32a convexly protruding due to the electrode lead 20; and a lower non-protruding surface 32b on which the electrode lead 20 is not disposed. The sealing part 32 including the lower protruding surface 32a and the lower non-protruding surface 32b is sealed by the sealing device of the secondary battery according to the present invention.

Specifically, the width, thickness and position of the electrode lead 20 vary according to the capacity and material of the electrode assembly, the vendor and the design of the secondary battery. As a result, the sealing device 100 of the secondary battery according to the present invention may have a block structure that is assemblable according to the width, thickness and position of the electrode leads 20. Accordingly, it is possible to seal the secondary battery having various electrode leads 20 without providing a new sealing device, thereby improving compatibility and reducing costs.

Hereinafter, a sealing device of a secondary battery according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Sealing device for secondary battery according to first embodiment of the present invention

As shown in fig. 1 to 6, the sealing device 100 of the secondary battery according to the first embodiment of the present invention is configured to seal the sealing portion of the pouch provided with the electrode lead, and includes a lower sealing tool 110 on which the sealing portion 32 of the pouch 30 provided with the electrode lead 20 is placed, and an upper sealing tool 120 which presses and seals the sealing portion 32 of the pouch 30 provided with the electrode lead 20 placed on the lower sealing tool 110.

Lower sealing tool

Referring to fig. 1 to 3, the lower sealing tool 110 has a structure to uniformly support the entire surface of the sealing portion of the pouch provided with the electrode lead in a state where the sealing portion of the pouch provided with the electrode lead is placed on the lower sealing tool 110. That is, the lower sealing tool 110 includes: a lower fixing block 111 on the top surface of which the sealing part 32 of the pouch 30 provided with the electrode lead 20 is placed; and one or more lower separable pieces 112, the one or more lower separable pieces 112 being separably coupled to the top surface of the lower fixed block 111 and supporting the non-protruding surface 32b, which is a sealing surface where the electrode lead 20 is not provided, in the sealing part 32 of the pouch 30 where the electrode lead 20 is provided.

The lower fixing block 111 has a rectangular plate-shaped shape, and the sealing part 32 of the pouch 30 provided with the electrode lead 20 is placed on the top surface of the lower fixing block 111. Here, in the sealing part 32, only the protruding surface 32a of the protruding surface 32a and the non-protruding surface 32b is supported on the lower fixing block 111, and the non-protruding surface 32b is disposed to be spaced apart from the lower fixing block 111.

The lower separable block 112 has a rectangular block shape and is separably coupled to a top surface of the lower fixed block 111 corresponding to the non-protruding surface 32b, thereby supporting the non-protruding surface 32b spaced apart from the lower fixed block 111.

The lower sealing tool 110 having the above-described configuration can adjust the position of the lower separable block 112 detachably coupled to the lower fixed block 111. Specifically, the lower fixed block 111 and the lower separable block 112 may be assembled or disassembled like a yugao block. As a result, convenience of use and compatibility can be improved. Accordingly, the entire sealing part 32 of the pouch 30 can be stably and uniformly supported regardless of the width, thickness, and position of the electrode lead 20.

Referring to fig. 4, in the lower sealing tool 110, a lower fixing block 111 and a lower separable block 112 have a structure for increasing a coupling force. For example, the lower fixed block 111 is provided with a plurality of first lower coupling parts 111a on an upper surface thereof in a length direction, and the lower separable block 112 is provided with a second lower coupling part 112a, the second lower coupling part 112a being separably coupled to a first lower coupling part 111a corresponding to the lower non-protruding surface 32b of the sealing part 32, on which the electrode lead 20 is not provided, among the plurality of first lower coupling parts 111 a. Thus, the coupling force between the lower fixed block 111 and the lower separable block 112 may be increased by the coupling of the first lower coupling portion 111a and the second lower coupling portion 112 a.

Here, the first lower coupling part 111a may be provided as a coupling groove, and the second lower coupling part 112a may be provided as a coupling protrusion detachably coupled to the coupling groove. That is, the lower fixed block 111 and the lower separable block 112 are coupled to each other by the coupling groove and the coupling protrusion. Thus, the lower fixed block 111 and the lower separable block 112 can be easily assembled or disassembled.

Each of the coupling groove and the coupling protrusion has a circular shape. Thus, the coupling groove and the coupling protrusion may be more easily coupled to each other. However, each of the coupling grooves and the coupling protrusions may have an elliptical shape or a polygonal shape, thereby preventing the coupling force between the lower fixed block 111 and the lower separable block 112 from being reduced and preventing the lower fixed block 111 and the lower separable block 112 from being rotated. In particular, each of the coupling groove and the coupling protrusion may have a triangular shape and a straight line to indicate a coupling direction.

As shown in fig. 6, in the lower sealing tool 110, a magnet may be used to increase the coupling force between the lower fixed block 111 and the lower separable block 112. For example, the magnets 114 may be respectively provided to the first lower coupling portion 111a of the lower fixed block 111 and the second lower coupling portion 112a of the lower separable block 112 to be attached to each other. The magnetic force due to the magnet 114 may increase the coupling force between the lower fixed block 111 and the lower separable block 112, and may greatly prevent shaking from occurring due to external impact. Here, the magnets 114 may be embedded inside the first and second lower coupling parts 111a and 112a, respectively. Thus, the magnet 114 may be prevented from being separated from or damaged by the first and second lower coupling portions 111a and 112 a.

Referring to fig. 5, the lower sealing tool 110 further includes a fixing member 113, and the fixing member 113 fixes the lower separable block 112 coupled to the lower fixing block 111. The fixing member 113 fixes the lower separable piece 112 coupled to the lower fixed block 111 to prevent the lower separable piece 112 from rotating to the left or right. For example, both ends of the fixing member 113 are supported on the corresponding lower fixing block 111 and lower separable block 112, respectively, to fix the lower fixing block 111 and the lower separable block 112, respectively. Thus, the lower separable piece 112 can be fixed by the supporting force of the fixing member 113 without rotating to the left or right when viewed in fig. 1.

Here, a fixing protrusion 113a rotatably coupled to the lower fixing block 111 is provided at one side of the fixing member 113. That is, the fixing member 113 can be rotated with respect to the fixing protrusion 113a to a position in which the other side of the fixing member 113 supports the lower separable piece 112, or to a position in which the lower separable piece 112 is not supported, thereby improving convenience of use and preventing the fixing member 113 from being lost.

Here, an adhesive layer may be further provided between the fixing member 113 and the lower fixing block 111, which are in close contact with each other, or between the fixing member 113 and the lower separable block 112, which are in close contact with each other. Thus, the coupling force between the fixing member 113 and the lower fixing block 111, which are in close contact with each other, or the fixing member 113 and the lower separable block 112, which are in close contact with each other, can be increased.

The fixing member 113 may be provided with an adhesive tape having an adhesive force. An adhesive tape may be attached to each of the lower fixed block 111 and the lower separable block 112 corresponding to each other to increase a fixing force between the lower fixed block 111 and the lower separable block 112.

Referring to fig. 2, in the lower sealing tool 110, when the lower fixing block 111 has a length smaller than that of the sealing part 32 of the bag 30, the lower extension block 115 may be coupled to the lower fixing block 111 such that the length of the lower fixing block 111 is increased to correspond to the sealing part 32 of the bag 30. For example, the lower sealing tool 110 may couple the lower extension block 115 to the end of the lower fixing block 111 such that the length of the lower fixing block 111 increases the length of the lower extension block 115.

Here, the lower fixing block 111 and the lower extension block 115 may be coupled to each other by fixing grooves and fixing protrusions, respectively, provided on surfaces corresponding to each other.

Upper sealing tool

The upper sealing tool 120 is configured to press and seal the sealing portion of the pouch provided with the electrode lead. The upper sealing tool 120 is disposed above the lower sealing tool 110 and is disposed to be lowerable toward the lower sealing tool 110. When lowered, the sealing part 32 of the pouch 30 from which the electrode lead 20 is drawn, which is placed on the lower sealing tool 110, is pressed and sealed. Here, since the entire sealing portion 32 (the protruding surface and the non-protruding surface) of the pouch 30 is supported on the lower sealing tool 110, the pressing force of the upper sealing tool 120 can be uniformly applied to the entire sealing portion 32, thereby uniformly sealing the sealing portion 32 of the pouch 30.

Thus, the sealing device 100 of the secondary battery according to the first embodiment of the present invention may include a lower sealing tool 110 assembled like a ledebo. Thus, the lower sealing tool may be assembled to match the position of the sealing portion of the pouch provided with the electrode lead. That is, the lower fixed block and the lower separable block may be assembled according to the shape of the sealing part of the pouch provided with the electrode lead, thereby increasing the sealing force therebetween. In particular, the sealing device can be used compatibly regardless of the width, thickness and position of the electrode lead, thereby reducing costs and preventing the possibility of occurrence of mold errors.

In addition, the sealing device of the secondary battery according to the first embodiment of the present invention may include a magnet to increase the coupling force between the lower fixed block and the lower separable block, particularly to prevent shaking from occurring.

Further, the sealing apparatus of a secondary battery according to the first embodiment of the present invention includes a fixing member to increase a fixing force between the lower fixing block and the lower separable block, particularly to prevent shaking from occurring.

Hereinafter, in the description of another embodiment of the present invention, the constituent elements having the same functions as those of the above-described embodiment are given the same reference numerals in the drawings, and thus, the repetitive description will be omitted.

Sealing device for secondary battery according to second embodiment of the present invention

As shown in fig. 1 to 9, a sealing device 100 of a secondary battery according to a second embodiment of the present invention includes a lower sealing tool 110 and an upper sealing tool 120, a sealing part 32 of a pouch 30 provided with an electrode lead 20 is placed on the lower sealing tool 110, and the upper sealing tool 120 presses and seals the sealing part 32 of the pouch 30 provided with the electrode lead 20 placed on the lower sealing tool 110.

The lower sealing tool 110 has the same configuration as that described in the first embodiment, and therefore, a repetitive description thereof will be omitted.

The upper sealing tool 120 has a structure that can be assembled like a ledebo.

That is, due to the electrode lead, the sealing part 32 of the pouch 30 provided with the electrode lead may be provided with an upper protruding surface 32c in the direction of the upper sealing tool 120 (in the upward direction when viewed in fig. 1). Thus, the upper sealing tool 120 may have a block structure that may be assembled to match the sealing portion 32 of the bag 30 provided with the upper protruding surface 32 c.

The top surface of the sealing portion 32 of the bag 30 includes an upper protruding surface 32c and an upper non-protruding surface 32 d.

For example, referring to fig. 7 and 8, the upper sealing tool 120 may include an upper fixing block 121, and one or more upper separable blocks 122, the upper fixing block 121 pressing the sealing part 32 of the pouch 30 provided with the electrode lead, the one or more upper separable blocks 122 being separably coupled to the upper fixing block 121 and pressing an upper non-protruding surface 32d, which is a sealing part of the sealing part 32 of the pouch 30 provided with the electrode lead 20, to which the electrode lead 20 is not provided.

Thus, the upper sealing tool 120 includes an upper fixing block 121 and one or more upper separable blocks 122 separably coupled to the upper fixing block 121 to simultaneously press the upper protruding surface 32c and the upper non-protruding surface 32d, thus uniformly pressing the entire top surface of the sealing part 30, thereby uniformly sealing the entire sealing part 30.

In the upper sealing tool 120, the upper fixing block 121 and the upper separable block 122 have a structure for increasing coupling force. For example, the upper fixing block 121 may be provided with a plurality of first upper coupling portions 121a on a bottom surface thereof in a length direction. The upper separable piece 122 may be provided with a plurality of second upper coupling portions 122a, and the plurality of second upper coupling portions 122a may be separably coupled to the first upper coupling portions 121a corresponding to the upper non-protruding surface 32d among the first upper coupling portions 121 a. Thus, the coupling force between the upper fixed block 121 and the upper separable block 122 may be increased by the first and second upper coupling portions 121a and 122 a.

Here, the first upper coupling part 121a may be provided as a coupling groove, and the second upper coupling part 122a may be provided as a coupling protrusion detachably coupled to the coupling groove. Accordingly, the first and second upper coupling parts 121a and 122a may be easily coupled to each other.

The first and second upper coupling portions 121a and 122a are provided with magnets 114 so as to be attached to each other. Thus, the coupling force between the upper fixed block 121 and the upper separable block 122 may be increased by the magnet 114.

The upper sealing tool 120 further includes a fixing member 113, and the fixing member 113 fixes the upper separable block 122 coupled to the upper fixing block 121. The fixing member 113 fixes the upper separable piece 122 coupled to the upper fixing block 121 to prevent the upper separable piece 122 from rotating to the left or right.

In the upper sealing tool 120, when the upper fixing block 121 has a length smaller than that of the sealing part 32 of the bag 30, the upper extension block 124 may be coupled to the upper fixing block 121 such that the length of the upper fixing block 121 is increased to correspond to the sealing part 32 of the bag 30. For example, the upper sealing tool 120 may couple the upper extension block 124 to the end of the upper fixing block 121 such that the length of the upper fixing block 121 increases the length of the upper extension block 124.

Thus, the upper sealing tool 120 includes an upper fixing block 121 and an upper separable block 122, which are assembled with each other like a ledebo to uniformly press the entire top surface of the sealing part 30 of the pouch provided with the electrode lead, thereby uniformly sealing the entire sealing part 30 of the pouch 30.

In summary, the sealing device 100 for a secondary battery according to the second embodiment of the present invention may include a lower sealing tool 110 and an upper sealing tool 120, which are assembled with each other like a ledebo. Accordingly, the lower sealing tool and the upper sealing tool may be assembled with each other to match the position of the sealing part of the pouch provided with the electrode lead, thereby increasing the sealing force of the sealing part of the pouch. In particular, the sealing device can be used compatibly regardless of the width, thickness and position of the electrode lead, thereby reducing costs and preventing the possibility of occurrence of mold errors.

Hereinafter, a sealing method of the sealing device 100 using a secondary battery according to the second embodiment of the present invention will be described.

[ method for sealing Secondary Battery according to second embodiment of the present invention ]

As shown in fig. 10, a sealing method of a secondary battery according to a second embodiment of the present invention includes: a lower sealing tool preparing step (S10) of preparing the lower sealing tool 110; an upper sealing tool preparing step (S20) of preparing the upper sealing tool 120; a sealing part placing step (S30) of placing the sealing part 32 of the pouch 30 from which the electrode lead is drawn on the top surface of the lower sealing tool 110; and a sealing part sealing step (S40) of lowering the upper sealing tool 120 toward the lower sealing tool 110 to press and seal the sealing part 32 of the pouch 30 provided with the electrode lead placed on the lower sealing tool 110.

Lower seal tool preparation step

The lower sealing tool preparing step (S10) includes: a lower fixing block preparation step of preparing a lower fixing block 111 having a length corresponding to the length of the sealing part 32 of the pouch in which the electrode lead 20 is disposed; and a lower separable piece preparing process of bonding one or more lower separable pieces 112 to a top surface of the lower fixing piece 111 corresponding to a lower non-protruding surface 32b, which is a sealing portion where the electrode lead 20 is not provided, of the sealing portion 32 of the pouch 30 where the electrode lead 20 is provided.

Here, in the lower separable block preparation process, the second lower coupling portions 112a formed on the lower separable block 112 may be coupled to the first lower coupling portions 111a formed on the lower fixed block 111 to increase the coupling force between the lower fixed block 111 and the lower separable block 112.

The lower sealing tool preparing step (S10) further includes a lower extension block bonding process for increasing the length of the lower fixing block 111 when the lower fixing block 111 has a length smaller than the length of the sealing part 32 of the pouch 30 where the electrode lead 20 is disposed.

In the lower extension block coupling process, the lower extension blocks 115 may be coupled to both ends of the lower fixing block 111 to increase the length of the lower fixing block 111, thereby preparing the lower fixing block 111 corresponding to the sealing part 32 of the pouch 30 provided with the electrode lead 20.

Here, the lower fixing block 111 and the lower extension block 115 may be coupled to each other by fixing grooves and fixing protrusions formed on surfaces corresponding to each other to increase a coupling force between the lower fixing block 111 and the lower extension block 115.

The lower sealing tool preparing step (S10) further includes a fixing member fixing process of fixing the lower fixing block 111 and the lower separable block 112 to each other without moving after the lower fixing block 111 and the lower separable block 112 are coupled to each other.

That is, in the fixing member fixing process, the lower fixing block 111 and the lower separable block 112 are fixed to each other by using the fixing member 113. Here, one side of the fixing member 113 is fixed to the lower fixing block 111 by the fixing protrusion 113a, and thus the fixing member 113 rotates with respect to the fixing protrusion 113 a. As a result, the other side of the fixing member 113 may be provided to be supported on the lower separable piece 112 or may be provided not to be supported on the lower separable piece 112, thereby fixing the lower fixed block 111 and the lower separable piece 112 without moving or releasing the fixing of the lower fixed block 111 and the lower separable piece 112.

In particular, in the lower sealing tool preparing step (S10), the lower fixing block 111 and the lower separable block 112 may be attached to each other by the magnets 114, the magnets 114 being disposed on the corresponding surfaces of the lower fixing block 111 and the lower separable block 112 to increase the coupling force between the lower fixing block 111 and the lower separable block 112.

Upper seal tool preparation step

In the upper sealing tool preparing step (S20), the upper sealing tool is set on the lower sealing tool.

When the upper protruding surface 32c and the upper non-protruding surface 32d are formed on the top surface of the sealing part 32 of the pouch 30 provided with the electrode lead 20, a process of assembling the upper sealing tool 120 may be performed to simultaneously press the upper protruding surface 32c and the upper non-protruding surface 32 d.

The upper sealing tool preparing step (S20) includes: an upper fixing block preparation step of preparing an upper fixing block 121 having a length corresponding to the length of the sealing part 32 of the pouch in which the electrode lead 20 is disposed; and an upper separable piece preparing process of bonding one or more upper separable pieces 122 to a bottom surface of the upper fixing piece 121 corresponding to an upper non-protruding surface 32d, which is a sealing part where the electrode lead 20 is not provided, of the sealing part 32 of the pouch 30 where the electrode lead 20 is provided. When the preparation is completed as described above, the assembled upper sealing tool is set on the lower sealing tool.

Here, in the upper separable block preparation process, the second upper coupling portions 122a formed on the upper separable block 122 may be coupled to the first upper coupling portions 121a formed on the upper fixed block 121 to increase the coupling force between the upper fixed block 121 and the upper separable block 122.

The upper sealing tool preparing step (S10) further includes an upper extension block coupling process of increasing the length of the upper fixing block 121 when the upper fixing block 121 has a length less than the length of the sealing part 32 of the pouch 30 provided with the electrode lead 20.

In the upper extension block coupling process, the upper extension blocks 124 may be coupled to both ends of the upper fixing block 121 to increase the length of the upper fixing block 121, thereby preparing the upper fixing block 121 corresponding to the sealing part 32 of the pouch 30 provided with the electrode lead 20.

Sealing part placing step

In the sealing part placing step (S30), the sealing part 32 of the pouch 30 provided with the electrode lead 20 is placed on the top surface of the lower sealing tool 110. As a result, the lower protruding surface 32a of the sealing part, which protrudes out of the electrode lead 20, is supported on the lower fixing block 111, and the lower non-protruding surface of the sealing part, on which the electrode lead 20 is not provided, is supported on the lower separable block 112. That is, the entire sealing part 32 of the pouch 30 provided with the electrode lead may be uniformly supported on the top surface of the lower sealing tool 110.

Sealing step of sealing part

In the sealing part sealing step (S40), the upper sealing tool 120 is lowered toward the lower sealing tool 110 to press and seal the sealing part 32 of the pouch provided with the electrode lead 20 placed on the lower sealing tool 110. Here, the non-protruding surfaces 23b and 23d, on which the electrode leads 20 are not provided, are sealed while being pressed by the lower and upper separable blocks 112 and 122. That is, the protruding surface of the sealing part is pressed by the lower fixed block and the upper fixed block, and the non-protruding surface of the sealing part is pressed by the lower separable block and the upper separable block. Thus, the entire sealing part 32 of the pouch provided with the electrode lead 20 may be uniformly pressed to increase the sealing force.

Sealing device for secondary battery according to third embodiment of the present invention

As shown in fig. 11 and 12, the sealing device of the secondary battery according to the second embodiment of the present invention includes a lower sealing tool 110. The lower sealing tool 110 includes a lower fixed block 111 and a lower separable block 112.

Here, the lower separable piece 112 has a structure in which the thickness and length are adjustable.

As a first example, as shown in fig. 11, the lower separable block 112 includes a plurality of unit blocks 112b combined to be stacked in a vertical direction. Thus, the height of the lower separable piece 112 can be adjusted to match the height of the lower protruding surface 32a of the sealing part 32, which protrudes out of the electrode lead.

As a second example, as shown in fig. 12, the lower separable block 112 includes unit blocks 112c coupled to each of both end portions in correspondence with each other. Thus, the length of the lower separable piece 112 can be more precisely adjusted to match the length of the non-protruding surface 32b of the sealing part 32, on which the electrode lead is not provided.

Accordingly, the scope of the invention is defined by the appended claims rather than by the foregoing description and the exemplary embodiments described herein. Various modifications made within the meaning of an equivalent of the claims of the invention and within the claims are to be regarded as being within the scope of the invention.