Gas removal equipment for secondary batteries

Abstract

The present invention is a gas removal equipment for a secondary battery, which includes a gas removal device that discharges gas generated inside a pouch, and the gas removal device includes first and second gas discharge members that are arranged to correspond to one side and the other side of the pouch, respectively, and pressurize the one side and the other side to discharge gas generated inside the pouch via the one side and the other side, and a moving member that is arranged to correspond to the one side and the other side, respectively, and moves the second gas discharge member in a straight line toward the first gas discharge member so that the first and second gas discharge members pressurize the one side and the other side, thereby making it possible to effectively discharge gas generated inside the pouch.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0155702, filed on Nov. 12, 2021, and all the contents disclosed in the document of the Korean patent application are incorporated herein by reference in their entirety.

[0002] The present invention relates to gas removal equipment for a secondary battery that discharges and removes gas generated inside the secondary battery to the outside.

Background Art

[0003] Generally, a secondary battery means a battery that can be charged and discharged, unlike a primary battery that cannot be charged. Such secondary batteries are widely used in the field of advanced electronic devices such as mobile phones, notebook computers, and camcorders.

[0004] And the secondary battery can be variously classified according to the structure of the electrode assembly. As an example, the secondary battery can be classified into a stack type structure, a winding type (jelly roll type) structure, and a stack / folding type structure.

[0005] On the other hand, the secondary battery includes an electrode assembly and a case for accommodating the electrode assembly, and the electrode assembly has a structure in which electrodes and separators are alternately laminated.

[0006] The manufacturing method of the secondary battery having the above structure includes a step of accommodating the electrode assembly together with an electrolyte in a pouch, a step of sealing the pouch to manufacture the secondary battery, and a step of charging and discharging the secondary battery to activate it.

[0007] However, the secondary battery has a problem that a large amount of gas is generated inside the secondary battery during the charge and discharge process, and the secondary battery swells. In particular, the secondary battery has a problem that the charge and discharge efficiency is significantly reduced due to swelling.

Summary of the Invention

Problems to be Solved by the Invention

[0008] The gas removal equipment for secondary batteries of the present invention for solving the above problems aims to effectively discharge the gas generated inside the secondary battery.

Means for Solving the Problems

[0009] The gas removal equipment for secondary batteries of the present invention for achieving the above object includes a gas removal device for discharging the gas generated inside the pouch. The gas removal device is arranged to correspond to one surface portion and the other surface portion of the pouch respectively, and pressurizes the one surface portion and the other surface portion, and includes first and second gas discharge members for discharging the gas generated inside the pouch through the one surface portion and the other surface portion, and a moving member for arranging the first and second gas discharge members to correspond to the one surface portion and the other surface portion respectively, and moving the second gas discharge member linearly toward the first gas discharge member so that the first and second gas discharge members pressurize the one surface portion and the other surface portion. The moving member includes a coupling piece to which the first gas discharge member is coupled on the surface facing the one surface portion, and the second gas discharge member is coupled on the surface facing the other surface portion, is connected to the coupling piece, and is linearly movably connected toward the coupling piece. By linearly moving the second gas discharge member toward the first gas discharge member, the moving member can include a moving piece for pressurizing the one surface portion and the other surface portion of the pouch by the first and second gas discharge members.

[0010] The coupling piece can be provided with a guide rail formed in the direction of the moving piece, and the moving piece can be provided with a guide portion connected to the guide rail and linearly moving along the guide rail toward the coupling piece.

[0011] The first gas discharge member includes a first body coupled to the coupling piece and disposed on one surface of the pouch, a first main adhesion pad that forms a sealed space while being pressed against one surface of the pouch, a first piercing piece that pierces the pouch located in the sealed space formed by the first main adhesion pad, and a first gas discharge part that discharges the gas inside the pouch through the pierced part of the pouch and the first main adhesion pad. The second gas discharge member includes a second body coupled to the moving piece and disposed on the other surface of the pouch, a second main adhesion pad that forms a sealed space while being pressed against the other surface of the pouch, a second piercing piece that pierces the pouch located in the sealed space formed by the second main adhesion pad, and a second gas discharge part that discharges the gas inside the pouch through the pierced part of the pouch and the second main adhesion pad.

[0012] The first main adhesion pad and the second main adhesion pad are pressed against the one surface and the other surface so as to correspond to each other, and the first piercing piece and the second piercing piece can be provided to pierce one side and the other side of the pouch located in the sealed space formed between the first main adhesion pad and the second main adhesion pad, respectively.

[0013] The first gas discharge member further includes one or more first adsorption pieces provided on the first body and adsorbed to one surface of the pouch, and the second gas discharge member can further include one or more second adsorption pieces provided on the second body and adsorbed to the other surface of the pouch.

[0014] When the first and second gas discharge members return to their original positions by the moving piece, the first adsorption piece and the second adsorption piece can separate the one surface and the other surface of the pouch so as to expand.

[0015] The first suction piece includes a first suction pad adsorbed to one surface portion of the pouch, and a first suction body that provides a suction force so that the first suction pad is adsorbed to one surface portion of the pouch. The second suction piece can include a second suction pad adsorbed to the other surface portion of the pouch, and a second suction body that provides a suction force so that the second suction pad is adsorbed to the other surface portion of the pouch.

[0016] The gas removal device can further include a sealing member composed of a first sealing piece and a second sealing piece that apply pressure to both side surfaces of the pouch including the perforated portion and apply heat at the same time to seal the perforated portion.

[0017] The first sealing piece is provided on the first body, has a closed curve shape connected along the outer peripheral surface of the first main adhesion pad, and is provided to apply pressure and heat at the same time to one surface portion including the perforated portion. The second sealing piece can be provided on the second body, have a closed curve shape connected along the outer peripheral surface of the second main adhesion pad, and be provided to apply pressure and heat at the same time to the other surface portion including the perforated portion.

[0018] A closed curve-shaped sealing groove is formed on the pressure-applying surface of the first sealing piece that applies pressure to the one surface portion, and a closed curve-shaped sealing protrusion that is inserted into the sealing groove can be formed on the pressure-applying surface of the second sealing piece that applies pressure to the other surface portion.

[0019] The gas removal device further includes a sub-adhesion member that seals the pouch located between the first gas discharge member and the second gas discharge member. The sub-adhesion member is formed along the edge of the first body, has a closed curve shape with both ends connected, and includes a first sub-adhesion pad that adheres to one surface portion of the pouch including the sealed space sealed by the first main adhesion pad, and a second sub-adhesion pad that is formed along the edge of the second body, has a closed curve shape with both ends connected, and adheres to the other surface portion of the pouch including the sealed space sealed by the second main adhesion pad.

[0020] The sub-adhering member may further include a third suction body that generates a suction force so that the first and second sub-adhering pads are adsorbed to one surface and the other surface of the pouch.

[0021] The gas removal device may further include a moving device that moves the moving piece toward the connecting piece. The moving device may include a frame to which the connecting piece is fixed, a moving rod provided on the frame to which the moving piece is connected and that moves the moving piece in the direction of the connecting piece when advancing, and a driving piece that advances the moving rod.

[0022] The gas removal device may further include a guide member that guides the pouch inserted between the first and second gas discharge members so as not to contact the first and second gas discharge members. The guide member may include a first guide pin fixed to the first gas discharge member and guiding one surface of the pouch so that the one surface of the pouch does not contact the first gas discharge member, and a second guide pin fixed to the second gas discharge member and guiding the other surface of the pouch so that the other surface of the pouch does not contact the second gas discharge member.

[0023] The first guide pin and the second guide pin may have an elastic restoring force so as to bend in a facing direction or the opposite direction.

Advantages of the Invention

[0024] The gas removal facility for a secondary battery of the present invention includes first and second gas discharge members and a moving member, so that gas can be discharged simultaneously through one surface and the other surface of the pouch, and as a result, the gas discharge force can be increased.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0026] Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement it. However, the present invention can be realized in various different forms and is not limited to the embodiments described herein. And in the drawings, in order to clearly explain the present invention, parts not related to the explanation are omitted, and similar reference numerals are given to similar parts throughout the specification.

[0027] [Secondary Battery] As shown in FIGS. 12 to 14, the secondary battery 10 includes an electrode assembly and a pouch 11 that houses the electrode assembly. The pouch 11 includes a housing portion that houses the electrode assembly, a gas collection portion that collects gas generated in the housing portion, and a seal portion that seals the housing portion and the gas collection portion.

[0028] The pouch 11 having such a structure is manufactured using a pair of pouch films. That is, a housing portion for housing the electrode assembly is formed on one side of the pair of pouch films, a gas pocket portion is formed on the other side of the pair of pouch films, and a seal portion for sealing the housing portion and the gas pocket portion is formed at the edges of the pair of pouch films.

[0029] Hereinafter, the pouch film located on one side of the pouch is referred to as one surface portion 11a, and the pouch film located on the other side is referred to as the other surface portion 11b.

[0030] On the other hand, although the secondary battery can improve battery performance by charging and discharging, at this time, there is a problem that a large amount of gas is generated inside the pouch. In order to solve the above problems, the gas inside the pouch is discharged, and at this time, the gas removal equipment for secondary batteries of the present invention is used.

[0031] [Gas Removal Equipment for Secondary Batteries of the Present Invention] As shown in FIGS. 1 to 3, the gas removal equipment for secondary batteries of the present invention is for discharging gas generated inside the pouch through the gas pocket portion (hereinafter referred to as the pouch) of the pouch 11. In particular, the gas removal equipment for secondary batteries of the present invention can discharge the gas inside the pouch simultaneously through the one surface portion 11a and the other surface portion 11b of the pouch 11, and as a result, the efficiency and rapidity of gas discharge can be improved.

[0032] As an example, the gas removal equipment for secondary batteries of the present invention can include a gas removal device 100 that discharges gas generated inside the pouch.

[0033] Gas Removal Device The gas removal device 100 has a structure for simultaneously discharging the gas inside the pouch through one surface portion and the other surface portion of the pouch.

[0034] That is, as shown in FIGS. 4 and 5, the gas removal device 100 is arranged so as to correspond to one surface portion and the other surface portion of the pouch, respectively, and pressurizes the one surface portion and the other surface portion of the pouch, and discharges the gas generated inside the pouch through the one surface portion and the other surface portion. The first and second gas discharge members 110 and 120, and a moving member 130 that linearly moves the second gas discharge member 120 toward the first gas discharge member 110 so that the first and second gas discharge members pressurize the one surface portion and the other surface portion.

[0035] The first gas discharge member 110 is for discharging the gas inside the pouch 11 through one surface portion 11a of the pouch 11. That is, the first gas discharge member 110 is coupled to the coupling piece 131, and includes a first body 111 disposed on one surface portion 11a of the pouch 11, a first main contact pad 112 that forms a sealed space while being pressurized against one surface portion 11a of the pouch 11, a first piercing piece 113 that pierces the pouch 11 located in the sealed space formed by the first main contact pad 112, and a first gas discharge portion 114 that discharges the gas inside the pouch 11 through the pierced portion of the pouch 11 and the first main contact pad 112.

[0036] Here, the first main contact pad 112 has the form of a bellows tube and is made of a material having a restoring force. It is provided at the center of the surface of the first body 111 facing the one surface portion 11a, and forms a sealed space while being pressurized against the one surface portion 11a of the pouch 11.

[0037] The first perforating piece 113 is provided inside the first main adhering pad 112 and is fixed to the first body 111 with the blade facing the one surface portion 11a. Here, the blade of the first perforating piece 113 is positioned so as not to protrude outside the first main adhering pad 112. This is to prevent the first perforating piece 113 from perforating the one surface portion 11a before the first main adhering pad 112 is pressed against the one surface portion 11a. In particular, a pair of the first perforating pieces 113 are provided, whereby two perforating sites can be formed on the one surface portion 11a, and as a result, perforation defects can be prevented and the gas discharge force can be increased. On the other hand, the first perforating piece 113 can be detachably coupled to the first body 111, whereby the efficiency of use can be increased. Also, the first perforating piece 113 can be provided in the form of a cutter blade, whereby a single-character perforating site can be formed on the one surface portion 11a.

[0038] Referring to FIG. 11, the first gas discharge part 114 is a device for inhaling gas and is connected to the inside of the first main adhering pad 112 via a discharge line formed in the first body 111. Thereby, the first gas discharge part 114 can discharge the gas inside the pouch 11 to the outside through the perforating site of the pouch 11 and the first main adhering pad 112 using the suction force.

[0039] Explaining the operating state of the first gas discharge member 110 having such a configuration, when the first body 111 is disposed on the one surface portion 11a of the pouch 11, the first main adhering pad 112 forms a sealed space while being pressed against the one surface portion 11a, and the first perforating piece 113 perforates the one surface portion 11a positioned in the sealed space. Next, the first gas discharge part 114 discharges the gas generated inside the pouch 11 to the outside through the perforating site of the pouch 11 and the first main adhering pad 112.

[0040] As shown in FIGS. 8 and 9, the second gas discharge member 120 is for discharging the gas inside the pouch 11 through the other surface portion 11b of the pouch 11. That is, the second gas discharge member 120 includes a second body 121 disposed on the other surface portion 11b of the pouch 11, a second main adhesion pad 122 that forms a sealed space while being pressed against the other surface portion 11b of the pouch 11, a second perforating piece 123 that perforates the pouch 11 located in the sealed space formed by the second main adhesion pad 122, and a second gas discharge portion 124 that discharges the gas inside the pouch 11 through the perforated portion of the pouch 11 and the second main adhesion pad 122.

[0041] Here, the second main adhesion pad 122 can be provided in the same form and material as the first main adhesion pad 112. The second main adhesion pad 122 is provided at the center of the surface of the second body 121 facing the other surface portion 11b, and forms a sealed space while being in close contact with the other surface portion 11b of the pouch 11.

[0042] The second perforating piece 123 can be provided in the same form and material as the first perforating piece 113. That is, the second perforating piece 123 is provided inside the second main adhesion pad 122 and is fixed to the second body 121 with the blade facing the other surface portion 11b. Here, the blade of the second perforating piece 123 is positioned so as not to protrude outside the second main adhesion pad 122. This is to prevent the second perforating piece 123 from perforating the other surface portion 11b before the second main adhesion pad 122 is pressed against the other surface portion 11b. In particular, a pair of the second perforating pieces 123 are provided, whereby two perforated portions can be formed in the other surface portion 11b. As a result, defective perforation can be prevented and the gas discharge force can be increased. On the other hand, the second perforating piece 123 can be detachably coupled to the second body 121, whereby the efficiency of use can be increased. Further, the second perforating piece 123 can be provided in the form of a cutter blade, whereby a linear perforated portion can be formed in the other surface portion 11b.

[0043] The second gas discharge part 124 can be configured by the same device as the first gas discharge part 114. That is, the second gas discharge part 124 is a device that inhales gas and is connected to the inside of the second main adhesion pad 122 through a discharge line formed in the second body 121. Thereby, the second gas discharge part 124 discharges the gas inside the pouch 11 to the outside through the perforated part of the pouch 11 and the second main adhesion pad 122 using the suction force.

[0044] To explain the operating state of the second gas discharge member having such a configuration, when the second body 121 is disposed on the other surface 11b of the pouch 11, the second main adhesion pad 122 forms a sealed space while being pressed against the other surface 11b, and the second perforating piece 123 perforates the other surface 11b located in the sealed space. Next, the second gas discharge part 124 discharges the gas inside the pouch 11 to the outside through the perforated part of the pouch 11 and the second main adhesion pad 122 using the suction force.

[0045] The moving member 130 is for arranging the first and second gas discharge members so as to correspond to the one surface portion 11a and the other surface portion 11b, respectively, and linearly moving the second gas discharge member 120 toward the first gas discharge member 110 so that the first and second gas discharge members 110 and 120 press the one surface portion 11a and the other surface portion 11b.

[0046] That is, as shown in FIGS. 4 and 5, the moving member 130 includes a coupling piece 131 to which the first gas discharge member 110 is coupled on the surface facing the one surface portion 11a, and a moving piece 132 to which the second gas discharge member is coupled on the surface facing the other surface portion 11b, is connected to the coupling piece 131, and is linearly movably connected toward the coupling piece 131.

[0047] When the moving member 130 having such a configuration moves linearly with the moving piece 132 moving toward the coupling piece 131, the second gas discharge member moves linearly toward the first gas discharge member 110. As a result, the first and second gas discharge members can be arranged so as to correspond to one surface portion 11a and the other surface portion 11b of the pouch 11, respectively.

[0048] Here, a guide rail 131a formed in the direction of the moving piece 132 is provided on the coupling piece 131, and a guide portion 132a that is connected to the guide rail 131a and moves linearly along the guide rail 131a toward the coupling piece 131 can be provided on the moving piece 132. Thereby, the moving piece 132 can move linearly along the guide rail 131a toward the coupling piece 131.

[0049] Therefore, the gas removal device 100 can simultaneously discharge the gas generated inside the pouch 11 through one surface portion 11a and the other surface portion 11b of the pouch 11.

[0050] On the other hand, in the gas removal device 100, the first main adhesion pad 112 and the second main adhesion pad 122 can be pressed so as to correspond to each other on the one surface portion 11a and the other surface portion 11b. As a result, a sealed space can be formed in the pouch 11 located between the first main adhesion pad 112 and the second main adhesion pad 122. Consequently, even if the pouch 11 located in the sealed space is perforated, it is possible to prevent gas from being drawn out between the first main adhesion pad 112 and the pouch 11 and between the second main adhesion pad 122 and the pouch 11.

[0051] On the one hand, in the gas removal device 100, the first perforating piece 113 and the second perforating piece 123 can be provided so as to respectively perforate one side and the other side of the pouch 11 located in the sealed space between the first main adhering pad 112 and the second main adhering pad 122. That is, referring to FIG. 10, the first perforating piece 113 can be provided to perforate the upper side of the pouch 11, and the second perforating piece 123 can be provided to perforate the lower side of the pouch 11. Thereby, it is possible to prevent the interference between the first perforating piece 113 and the second perforating piece 123 from occurring.

[0052] On the one hand, the first gas discharge member 110 is provided in the first body 111 and further includes one or more first adsorption pieces 115 adsorbed on one surface of the pouch 11. The second gas discharge member can be provided in the second body 121 and further include one or more second adsorption pieces 125 adsorbed on the other surface of the pouch 11.

[0053] That is, when one surface portion 11a and the other surface portion 11b of the pouch 11 are in close contact, there is a possibility that the gas inside the pouch 11 cannot be smoothly discharged. Therefore, the first adsorption piece 115 and the second adsorption piece 125 respectively adsorb the one surface portion 11a and the other surface portion 11b. When the first and second gas discharge members linearly move in the spreading direction, the one surface portion 11a and the other surface portion 11b of the pouch 11 will be respectively pulled. As a result, the one surface portion 11a and the other surface portion 11b can be separated so as to spread, and thus the gas can be smoothly discharged.

[0054] On the one hand, at least one, preferably four, first adsorption pieces 115 can be provided on the first body 111 located outside the first main adhering pad. The second adsorption plate can be provided on the second body 121 located outside the second main adhering pad, with at least one, preferably four.

[0055] As an example, referring to FIG. 7, the first suction piece 115 includes a first suction pad 115a that is adsorbed to one surface portion 11a of the pouch 11, and a first suction body 115b that provides a suction force so that the first suction pad 115a is adsorbed to the one surface portion 11a of the pouch 11. The second suction piece 125 includes a second suction pad 125a that is adsorbed to the other surface portion 11b of the pouch 11, and a second suction body 125b that provides a suction force so that the second suction pad 125a is adsorbed to the other surface portion 11b of the pouch 11. That is, when the suction force is provided by the first suction body 115b, the first suction pad 115a is adsorbed to the one surface portion 11a, and when the suction force is removed by the first suction body 115b, the first suction pad 115a is separated from the one surface portion 11a. When the suction force is provided by the second suction body 125b, the second suction pad 125a is adsorbed to the other surface portion 11b, and when the suction force is removed by the second suction body 125b, the second suction pad 125a is separated from the other surface portion 11b.

[0056] On the other hand, referring to FIG. 10, the gas removal device 100 further includes a seal member 140 that presses both side surfaces of the pouch 11 including the perforated portion and applies heat at the same time to seal the perforated portion formed in the pouch 11. The seal member 140 is composed of a first seal piece 116 and a second seal piece 126.

[0057] That is, the first seal piece 116 is provided in the first body 111 between the first main adhesion pad 112 and the first suction piece 115, has a closed curve shape formed along the outer peripheral surface of the first main adhesion pad 112, and is provided to apply pressure and heat to the one surface portion 11a including the perforated portion at the same time.

[0058] The second seal piece 126 is provided in the second body 121 between the second main adhesion pad 122 and the second suction piece, has a closed curve shape formed along the outer peripheral surface of the second main adhesion pad 122, and is provided to apply pressure and heat to the other surface portion 11b including the perforated portion at the same time.

[0059] When the first seal piece 116 and the second seal piece 126 having such a configuration are pressed while applying heat in a state where they are arranged to correspond to one surface portion 11a and the other surface portion 11b of the pouch 11, the surface of the pouch 11 including the perforated portion is sealed. It is possible to prevent the gas and the electrolytic solution inside the pouch 11 from being further discharged through the perforated portion.

[0060] On the other hand, a closed - curve - shaped seal projection is formed on the pressing surface of the first seal piece 116 that presses the one surface portion 11a, and a closed - curve - shaped seal groove into which the seal projection is inserted can be formed on the pressing surface of the second seal piece 126 that presses the other surface portion 11b. Thereby, when the first seal piece 116 and the second seal piece 126 are pressed corresponding to each other on the surface of the pouch 11, the seal projection of the first seal piece 116 is inserted into the seal groove of the second seal piece 126, and the pouch 11 positioned therebetween can be effectively pressed and sealed while applying heat.

[0061] On the other hand, the gas removal device 100 can further include a sub - adhesion member 150 for preventing gas from being discharged between the first and second main adhesion pads and the pouch 11. That is, the sub - adhesion member 150 has a structure for secondarily sealing the pouch 11 positioned between the first gas discharge member 110 and the second gas discharge member 120.

[0062] That is, the sub - adhesion member 150 can include a first sub - adhesion pad 117 and a second sub - adhesion pad 127.

[0063] The first sub - adhesion pad 117 is formed along the edge of the first body 111, has a closed - curve shape with both ends connected, and is provided to be adhered to one surface portion 11a of the pouch 11 including a sealed space adhered by the first main adhesion pad 112.

[0064] The second sub-adhesive pad 127 is formed along the edge of the second body 121, has a closed curve shape with both ends connected, and is provided so as to be adhered to the other surface portion 11b of the pouch 11 including a sealed space adhered by the second main adhesive pad 122.

[0065] Here, the first sub-adhesive pad 117 and the second sub-adhesive pad 127 can be made of a synthetic resin having elasticity.

[0066] In particular, the sub-adhesive member 150 can further include a third suction body 151 having an air suction force. The third suction body 151 can suck the air inside the first sub-adhesive pad 117 and the second sub-adhesive pad 127, and adsorb the first sub-adhesive pad 117 and the third sub-adhesive pad to the one surface portion 11a and the other surface portion 11b, respectively. In particular, the gas drawn into the first and second sub-adhesive pads can be discharged to the outside.

[0067] On the other hand, the gas removal facility for a secondary battery of the present invention can further include a moving device 200 that moves the moving piece 132 toward the coupling piece 131. By the moving device 200, the second gas discharge member 120 moves toward the first gas discharge member 110.

[0068] The moving device 200 includes a frame 210 to which the coupling piece 131 is fixed, a moving rod 220 provided on the frame 210, to which the moving piece 132 is coupled, and which moves the moving piece 132 in the direction of the coupling piece 131 during forward movement, and a driving piece 230 that advances the moving rod 220.

[0069] When the driving piece 230 of the moving device 200 having the above-described configuration operates, the moving rod 220 moves in the direction of the coupling piece 131 in FIG. 3. In conjunction with the moving rod 220, the moving piece 132 linearly moves in the direction of the coupling piece 131. As a result, while the second gas discharge member coupled to the moving piece 132 linearly moves toward the first gas discharge member 110, the first and second gas discharge members can be arranged so as to be pressed against both side surfaces of the pouch 11. Thereafter, when the moving rod 220 moves in the direction of the moving piece 132 in FIG. 3 by the driving piece 230, the moving piece 132 returns to its original position in conjunction with the moving rod 220. As a result, while the second gas discharge member coupled to the moving piece 132 returns to its original position, the first and second gas discharge members can be separated from both side surfaces of the pouch 11 by a set distance.

[0070] On the other hand, the driving piece can be composed of a hydraulic or pneumatic cylinder.

[0071] Here, as shown in FIG. 1, the moving device 200 can operate a plurality of gas removal devices 100 at once. That is, after arranging a plurality of gas removal devices 100 in the length direction of the moving rod 220, the coupling pieces 131 provided on the plurality of gas removal devices 100 are fixed to the frame 210, and the moving pieces 132 provided on the plurality of gas removal devices 100 are coupled to the moving rod 220.

[0072] When coupled in this way, the movement of the moving rod 220 can linearly move the moving pieces 132 provided on the plurality of gas removal devices 100 at the same time. As a result, since the plurality of gas removal devices 100 can be operated at once, a plurality of pouches 11 can be degassed at once.

[0073] On the other hand, the gas removal device 100 can further include a guide member 160 that guides the pouch 11 inserted between the first and second gas discharge members 110 and 120 so as not to contact the first and second gas discharge members 110 and 120. That is, it is possible to prevent the pouch 11 inserted between the first and second gas discharge members 110 and 120 from being deformed by being applied to a sub-adhesion pad, an adsorption piece, a main adhesion pad, etc.

[0074] For example, the guide member 160 includes a first guide pin 118 fixed to the first gas discharge member 110 and guiding one surface portion 11a of the pouch 11 to prevent the one surface portion 11a of the pouch 11 from contacting the first gas discharge member 110, and a second guide pin 128 fixed to the second gas discharge member and guiding the other surface portion 11b of the pouch 11 to prevent the other surface portion 11b of the pouch 11 from contacting the second gas discharge member 120.

[0075] Referring to FIG. 5, the first guide pin 118 includes a fixing portion fixed to the lower portion of the first gas discharge member 110, an extension portion extending to the lower left side surface of the first gas discharge member 110 in FIG. 3, and a guide portion 132a extending in a curved shape from the tip of the extension portion toward the one surface portion 11a to guide the one surface portion 11a of the pouch 11.

[0076] Referring to FIG. 5, the second guide pin 128 includes a fixing portion fixed to the lower portion of the second gas discharge member, an extension portion extending to the lower right side surface of the second gas discharge member 120 in FIG. 3, and a guide portion 132a extending in a curved shape from the tip of the extension portion toward the other surface portion 11b to guide the other surface portion 11b of the pouch 11.

[0077] On the other hand, the first guide pin 118 and the second guide pin 128 have an elastic restoring force so as to bend in the facing direction or the opposite direction, whereby the pouch 11 can be stably guided and damage to the pouch 11 can be prevented.

[0078] Therefore, by using the gas removal equipment for secondary batteries, the gas generated inside the secondary battery during charging and discharging can be effectively discharged.

[0079] Hereinafter, a gas removal method using the gas removal equipment for secondary batteries of the present invention will be described.

[0080] [Gas Removal Method for Secondary Batteries of the Present Invention] First, referring to FIG. 12, the pouch 11 is inserted between the first and second gas discharge members 110 and 120 of the gas removal device 100. At this time, the pouch 11 is guided by the first guide pin 118 of the first gas discharge member 110 and the second guide pin 128 of the second gas discharge member 120 and inserted between the first and second gas discharge members 110 and 120, thereby preventing the pouch 11 from contacting the first and second gas discharge members.

[0081] Next, referring to FIG. 13, the moving device 200 is used to press the first and second gas discharge members against both side surfaces of the pouch 11. That is, the driving piece 230 of the moving device 200 is driven to move the moving rod 220. Then, the second gas discharge member 120 coupled to the moving rod 220 can press the pouch 11 inserted between the first and second gas discharge members 110 and 120 while linearly moving in the direction of the first gas discharge member 110.

[0082] At this time, the first main adhesion pad 112 of the first gas discharge member 110 and the second main adhesion pad 122 of the second gas discharge member 120 form a sealed space while being pressed so as to correspond to one surface portion 11a and the other surface portion 11b of the pouch 11. In the process where the first and second main adhesion pads are pressed against the surface of the pouch 11, the first and second perforating pieces 123 perforate one surface portion 11a and the other surface portion 11b of the pouch 11 located in the sealed space, respectively. Then, the first adsorption piece 115 and the second adsorption piece are adsorbed to one surface portion 11a and the other surface portion 11b of the pouch 11, respectively, and the first and second sub - adhesion pads 117 and 127 are adhered to one surface portion 11a and the other surface portion 11b of the pouch 11, respectively.

[0083] In this state, using the first and second gas discharge parts, the gas inside the pouch 11 is discharged through the perforated part of the pouch 11 and the first and second main adhesion pads.

[0084] On the other hand, referring to FIG. 14, in order to increase the gas discharge force, when the moving rod 220 is returned to the original position by the driving piece 230, the first and second gas discharge members move away from each other from the pouch 11 while the second gas discharge member returns to the original position. At this time, one surface part 11a and the other surface part 11b of the pouch 11 are expanded by the first suction piece 115 and the second suction piece, so that the gas inside the pouch 11 can be discharged more quickly through the space between the one surface part 11a and the other surface part 11b.

[0085] After that, when the discharge of the gas is completed, the surface of the pouch 11 having the perforated part is sealed using the seal member 140.

[0086] That is, at the same time, the moving rod 220 is further moved by the driving piece 230 to press both side surfaces of the pouch 11 with the first and second gas discharge members 120. At this time, the first seal piece 116 of the first gas discharge member 110 and the second seal piece 126 of the second gas discharge member 120 also press the surface of the pouch 11. In this state, the first and second seal pieces 116 and 126 are heated to seal the surface of the pouch having the perforated part pressed between the first and second seal pieces.

[0087] When such a process is completed, the gas discharge process is completed.

[0088] The scope of the present invention is indicated by the appended claims rather than the above detailed description, and various embodiments derived from the meaning and scope of the claims and the equivalent concept thereof are possible.

Explanation of Reference Numerals

[0089] 100 Gas removal device 110 First gas discharge member 111 First body 112 First main adhesion pad 113 First perforated piece 114 First gas discharge part 115 First suction piece 115a First suction pad 115b First inhalation body 116 First seal piece 117 First sub - adhesion pad 118 First guide pin 120 Second gas discharge member 121 Second body 122 Second main adhesion pad 123 Second perforated piece 124 Second gas discharge part 125 Second suction piece 125a Second suction pad 125b Second inhalation body 126 Second seal piece 127 Second sub - adhesion pad 128 Second guide pin 130 Moving member 131 Connecting piece 131a Guide rail 132 Moving piece 132a Guide part 140 Sealing member 150 Sub - adhesion member 151 Third inhalation body 160 Guide member 200 Moving device 210 Frame 220 Moving rod 230 Driving piece

Claims

1. including a gas removal device for discharging gas generated inside the pouch, wherein the gas removal device first and second gas discharge members that are arranged to correspond to one surface portion and the other surface portion of the pouch respectively to pressurize the one surface portion and the other surface portion and discharge the gas generated inside the pouch through the one surface portion and the other surface portion; a moving member that arranges the first and second gas discharge members to correspond to the one surface portion and the other surface portion respectively, and moves the second gas discharge member linearly toward the first gas discharge member so that the first and second gas discharge members pressurize the one surface portion and the other surface portion of the pouch; wherein the moving member a coupling piece to which the first gas discharge member is coupled on a surface facing the one surface portion; a moving piece that is coupled to the other surface portion facing the other surface portion, is coupled to the coupling piece, and is linearly movably coupled toward the coupling piece, and pressurizes the one surface portion and the other surface portion of the pouch by the first and second gas discharge members by linearly moving the second gas discharge member toward the first gas discharge member; the first gas discharge member includes a first body coupled to the coupling piece and disposed on one surface portion of the pouch, a first main adhesion pad that forms a sealed space while being pressurized against the one surface portion of the pouch, a first piercing piece that pierces the pouch located in the sealed space formed by the first main adhesion pad, and a first gas discharge portion that discharges the gas inside the pouch through the pierced portion of the pouch and the first main adhesion pad; the second gas discharge member includes a second body coupled to the moving piece and disposed on the other surface portion of the pouch, a second main adhesion pad that forms a sealed space while being pressurized against the other surface portion of the pouch, a second piercing piece that pierces the pouch located in the sealed space formed by the second main adhesion pad, and a second gas discharge portion that discharges the gas inside the pouch through the pierced portion of the pouch and the second main adhesion pad; The gas removal device further includes a sealing member composed of a first sealing piece and a second sealing piece that pressurize both side surfaces of the pouch including the pierced portion and apply heat to seal the pierced portion, a gas removal facility for a secondary battery. **Claim 2**: The first seal piece is provided on the first body, has a closed curve shape connected along the outer peripheral surface of the first main contact pad, and is provided to apply pressure and heat simultaneously to one surface portion including the perforation site. The second seal piece is provided on the second body, has a closed curve shape connected along the outer peripheral surface of the second main contact pad, and is provided to apply pressure and heat simultaneously to the other surface portion including the perforation site. The gas removal equipment for secondary batteries according to claim 1. **Claim 3**: A closed curve-shaped seal groove is formed on the pressure-applying surface of the first seal piece that applies pressure to the one surface portion. A closed curve-shaped seal protrusion to be inserted into the seal groove is formed on the pressure-applying surface of the second seal piece that applies pressure to the other surface portion. The gas removal equipment for secondary batteries according to claim 2. **Claim 4**: It includes a gas removal device for discharging gas generated inside the pouch. The gas removal device is as follows: First and second gas discharge members that are arranged to correspond to one surface portion and the other surface portion of the pouch respectively, apply pressure to the one surface portion and the other surface portion, and discharge gas generated inside the pouch through the one surface portion and the other surface portion. A moving member that arranges the first and second gas discharge members to correspond to the one surface portion and the other surface portion respectively, and moves the second gas discharge member linearly toward the first gas discharge member so that the first and second gas discharge members apply pressure to the one surface portion and the other surface portion. The moving member is as follows: A coupling piece to which the first gas discharge member is coupled on the surface facing the one surface portion. A moving piece that is coupled to the second gas discharge member on the surface facing the other surface portion, is connected to the coupling piece, and is linearly movably connected toward the coupling piece. By linearly moving the second gas discharge member toward the first gas discharge member, the first and second gas discharge members apply pressure to one surface portion and the other surface portion of the pouch. The first gas discharge member includes a first body coupled to the coupling piece and arranged on one surface portion of the pouch, a first main contact pad that forms a sealed space while being pressed against one surface portion of the pouch, a first perforating piece that perforates the pouch located in the sealed space formed by the first main contact pad, and a first gas discharge portion that discharges gas inside the pouch through the perforation site of the pouch and the first main contact pad. The second gas discharge member includes a second body coupled to the moving piece and disposed on the other surface of the pouch, a second main adhesion pad that forms a sealed space while being pressed against the other surface of the pouch, a second perforating piece that perforates the pouch located in the sealed space formed by the second main adhesion pad, and a second gas discharge portion that discharges the gas inside the pouch through the perforated portion of the pouch and the second main adhesion pad. The gas removal device further includes a sub-adhesion member that seals the pouch located between the first gas discharge member and the second gas discharge member. The sub-adhesion member A first sub-adhesion pad that is formed along the edge of the first body, has a closed curve shape with both ends connected, and is adhered to one surface of the pouch including the sealed space adhered by the first main adhesion pad. A second sub-adhesion pad that is formed along the edge of the second body, has a closed curve shape with both ends connected, and is adhered to the other surface of the pouch including the sealed space adhered by the second main adhesion pad. The gas removal equipment for secondary batteries includes these.

5. The gas removal equipment for secondary batteries according to claim 4, wherein the sub-adhesion member further includes a third suction body that generates a suction force so that the first and second sub-adhesion pads are adsorbed to one surface and the other surface of the pouch.

6. It includes a gas removal device that discharges the gas generated inside the pouch. The gas removal device First and second gas discharge members that are disposed so as to correspond to one surface and the other surface of the pouch respectively, press the one surface and the other surface, and discharge the gas generated inside the pouch through the one surface and the other surface. A moving member that disposes the first and second gas discharge members so as to correspond to one surface and the other surface respectively, and moves the second gas discharge member linearly toward the first gas discharge member so that the first and second gas discharge members press the one surface and the other surface. The moving member A coupling piece to which the first gas discharge member is coupled on the surface facing the one surface. A moving piece is included, which is connected to the second gas discharge member on the surface facing the other surface portion, is connected to the connecting piece, and is linearly movably connected toward the connecting piece. By linearly moving the second gas discharge member toward the first gas discharge member, the first and second gas discharge members pressurize one surface portion and the other surface portion of the pouch. The gas removal device further includes a guide member that guides the pouch inserted between the first and second gas discharge members so that the pouch does not contact the first and second gas discharge members. The guide member includes a first guide pin fixed to the first gas discharge member and guiding the one surface portion of the pouch to support the one surface portion of the pouch so that it does not contact the first gas discharge member. and a second guide pin fixed to the second gas discharge member and guiding the other surface portion of the pouch to support the other surface portion of the pouch so that it does not contact the second gas discharge member. The gas removal equipment for secondary batteries.

7. The gas removal equipment for secondary batteries according to claim 6, wherein the first guide pin and the second guide pin have an elastic restoring force so as to bend in the facing direction or the opposite direction.

8. The connecting piece is provided with a guide rail formed in the direction of the moving piece. The moving piece is provided with a guide portion connected to the guide rail and linearly moving along the guide rail toward the connecting piece. The gas removal equipment for secondary batteries according to any one of claims 1, 4, and 6.

9. The first gas discharge member includes a first body connected to the connecting piece and disposed on one surface portion of the pouch, a first main contact pad that forms a sealed space while being pressed against the one surface portion of the pouch, a first punching piece that punches the pouch located in the sealed space formed by the first main contact pad, and a first gas discharge portion that discharges the gas inside the pouch through the punched portion of the pouch and the first main contact pad. The second gas discharge member includes a second body coupled to the moving piece and disposed on the other surface of the pouch, a second main adhesion pad that forms a sealed space while being pressed against the other surface of the pouch, a second piercing piece that pierces the pouch located in the sealed space formed by the second main adhesion pad, and a second gas discharge part that discharges the gas inside the pouch through the pierced part of the pouch and the second main adhesion pad. The gas removal facility for secondary batteries according to claim 6.

10. The first main adhesion pad and the second main adhesion pad are pressed against each other on the one surface and the other surface so as to correspond to each other. The first piercing piece and the second piercing piece are provided so as to pierce one side and the other side of the pouch located in the sealed space formed between the first main adhesion pad and the second main adhesion pad, respectively. The gas removal facility for secondary batteries according to any one of claims 1, 4, and 9.

11. The first gas discharge member further includes one or more first suction pieces provided on the first body and adsorbed on one surface of the pouch. The second gas discharge member further includes one or more second suction pieces provided on the second body and adsorbed on the other surface of the pouch. The gas removal facility for secondary batteries according to any one of claims 1, 4, and 9.

12. When the first and second gas discharge members return to their original positions by the moving piece, the first suction piece and the second suction piece separate the one surface and the other surface of the pouch so as to expand. The gas removal facility for secondary batteries according to claim 11.

13. The first suction piece includes a first suction pad adsorbed on one surface of the pouch and a first suction body that provides a suction force so that the first suction pad is adsorbed on one surface of the pouch. The second suction piece includes a second suction pad adsorbed on the other surface of the pouch and a second suction body that provides a suction force so that the second suction pad is adsorbed on the other surface of the pouch. The gas removal facility for secondary batteries according to claim 11.

14. The gas removal device further includes a sealing member composed of a first sealing piece and a second sealing piece that pressurize both side surfaces of the pouch including the pierced part and apply heat at the same time to seal the pierced part. The gas removal facility for secondary batteries according to claim 4 or 9.

15. The first sealing piece is provided on the first body, has a closed curve shape connected along the outer peripheral surface of the first main contact pad, and is provided to apply pressure and heat simultaneously to one surface portion including a perforated portion. The second sealing piece is provided on the second body, has a closed curve shape connected along the outer peripheral surface of the second main contact pad, and is provided to apply pressure and heat simultaneously to the other surface portion including a perforated portion. The gas removal facility for secondary batteries according to claim 14.

16. A closed curve-shaped seal groove is formed on the pressing surface of the first sealing piece that presses the one surface portion. A closed curve-shaped seal protrusion to be inserted into the seal groove is formed on the pressing surface of the second sealing piece that presses the other surface portion. The gas removal facility for secondary batteries according to claim 15.

17. The gas removal device further includes a sub-contact member that seals the pouch located between the first gas discharge member and the second gas discharge member. The sub-contact member is formed along the edge of the first body, has a closed curve shape with both ends connected, and includes a first sub-contact pad that is in contact with one surface portion of the pouch including a sealed space sealed by the first main contact pad. is formed along the edge of the second body, has a closed curve shape with both ends connected, and includes a second sub-contact pad that is in contact with the other surface portion of the pouch including a sealed space sealed by the second main contact pad. The gas removal facility for secondary batteries according to claim 1 or 9.

18. The sub-contact member further includes a third suction body that generates a suction force so that the first and second sub-contact pads are adsorbed to one surface portion and the other surface portion of the pouch. The gas removal facility for secondary batteries according to claim 17.

19. The gas removal device further includes a moving device that moves the moving piece toward the connecting piece. The moving device includes a frame to which the connecting piece is fixed. is provided on the frame, to which the moving piece is coupled, and includes a moving rod that moves the moving piece in the direction of the connecting piece when moving forward. and a driving piece that moves the moving rod forward. The gas removal facility for secondary batteries according to any one of claims 1, 4, and 6.

20. The gas removal device further includes a guide member that guides the pouch inserted between the first and second gas discharge members so that the pouch does not contact the first and second gas discharge members. The guide member A first guide pin fixed to the first gas discharge member, guiding to support one surface portion of the pouch so that the one surface portion of the pouch does not contact the first gas discharge member; A second guide pin fixed to the second gas discharge member, guiding to support the other surface portion of the pouch so that the other surface portion of the pouch does not contact the second gas discharge member, the gas removal facility for secondary batteries according to claim 1 or 4.

21. The gas removal facility for secondary batteries according to claim 20, wherein the first guide pin and the second guide pin have an elastic restoring force so as to bend in opposite directions or in the opposite direction.

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