Apparatus for manufacturing pouch-type secondary battery

Abstract

The present invention relates to an apparatus for manufacturing a pouch-type secondary battery, and more particularly, to an adsorption device for holding a pouch in an electrolyte injection process, and an apparatus for manufacturing a pouch-type secondary battery including the same. According to one example of the present invention, there may be provided a pouch-type secondary battery manufacturing apparatus, comprising: a base; a pad assembly disposed in front of the base and having an adsorption pad that adsorbs the pouch in a horizontal direction to form an electrolyte injection path into the interior of the pouch; and a pad cover covering an upper portion and a front portion of the pad assembly, and having a nozzle that sprays air toward the adsorption pad.

Description

TECHNICAL FIELD

[0001] The present application relates to a pouch-type secondary battery manufacturing apparatus, and more particularly, to a suction device that holds a pouch in an electrolyte injection process, and a pouch-type secondary battery manufacturing apparatus including the same.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0117452, filed on September 5, 2023, the disclosure of which is incorporated herein in its entirety by reference. BACKGROUND

[0003] In general, as the supply and popularization of portable small-sized electric and electronic devices, development of new-type secondary batteries such as nickel-metal hydride batteries and lithium secondary batteries is actively being conducted. Recently, lithium secondary batteries are not only widely used for power tools, but also used for vehicles.

[0004] The lithium secondary battery refers to a battery that uses carbon such as graphite as a negative active material, uses a lithium-containing oxide as a positive material, and uses a non-aqueous solvent as an electrolyte.

[0005] Such a secondary battery is manufactured in the form of a battery assembly by accommodating an electrode assembly in which a positive electrode, a separator, and a negative electrode are sequentially measured in an external material such as a pouch or a cylindrical can. Thereafter, a process of injecting an electrolyte into the battery assembly using an electrolyte injection device is performed.

[0006] Figure 1 One example of a conventional suction device that holds a pouch in an electrolyte injection process is illustrated.

[0007] The pad assembly 20 is disposed to be relatively longer in the left and right directions with respect to the base 1, and the pad assembly 20 is disposed to be movable in the front and rear directions with respect to the base 1.

[0008] The pad assembly 20 includes a frame 21 and a plurality of suction pads 22 disposed in the frame 21. A vacuum pipe 23 is connected to the suction pads 22 such that the suction pads 22 suction the pouch by vacuum.

[0009] The pad assembly 20, particularly the frame 21, can be connected with a linear movement device 30, and thus disposed to be linearly movable in the front and rear directions.

[0010] The suction device can be referred to as a device disposed on both sides with respect to the pouch, thereby securing a path in which the electrolyte is to be injected by holding the pouch at the time of the electrolyte injection process. That is, it can be referred to as a device that fixes the pouch in a state in which the opening portion is expanded by suctioning the upper portion of the pouch.

[0011] Electrolyte injection is generally performed through a cylindrical tube. Since the electrolyte injection tube is formed as a simple cylindrical tube, during the electrolyte injection process, when the electrolyte injection tube is moved and waits, the remaining electrolyte inside the electrolyte injection tube can leak outside the tube. In addition, a small amount of electrolyte can fly out and contaminate the outside during the injection process. The leaked electrolyte can spread or transfer to the adsorption device, thereby causing contamination and corrosion of the device and equipment.

[0012] In particular, foreign matter adheres to the adsorption pad that adsorbs the pouch by vacuum, thereby deteriorating the performance of the adsorption pad, so that there can be a problem that an error occurs in vacuum adsorption. In addition, the foreign matter adhering to the adsorption pad during the pouch adsorption process is transferred to the pouch, so that electrolyte foreign matter remains on the surface of the pouch, so that they can also cause a pouch defect.

[0013] As shown in Figure 1 It can be seen that the conventional adsorption device, particularly the adsorption pad, is not protected from such external contamination and is directly exposed. In other words, it can be said that the conventional adsorption device clearly exhibits a problem due to electrolyte foreign matter. Therefore, there is a need to design a method capable of effectively preventing a problem due to electrolyte foreign matter in the adsorption device. SUMMARY

[0014] TECHNICAL PROBLEM

[0015] The present application aims to solve the problems of the conventional manufacturing device.

[0016] Through one example of the present application, a manufacturing device and a manufacturing method capable of effectively preventing electrolyte foreign matter generated in an electrolyte injection process from being transferred to an adsorption device or an adsorption pad are intended to be provided.

[0017] Through one example of the present application, a manufacturing device and a manufacturing method capable of effectively removing electrolyte foreign matter adhering to an adsorption pad are intended to be provided.

[0018] Through one example of the present application, a manufacturing device and a manufacturing method capable of effectively preventing electrolyte foreign matter removed when removing the electrolyte foreign matter from spreading to the surrounding environment are intended to be provided.

[0019] Through one example of the present application, a manufacturing device and a manufacturing method capable of preventing an increase in time required for a manufacturing process by removing electrolyte contaminants or removing electrolyte contamination only under certain conditions by utilizing an idle period in the basic operation of the adsorption device are intended to be provided.

[0020] TECHNICAL SOLUTION

[0021] To achieve the above object, according to one example of the present application, a pouch-type secondary battery manufacturing apparatus can be provided, including: a base; a pad assembly disposed in front of the base and having an adsorption pad that adsorbs a pouch in a horizontal direction to form an electrolyte injection path into an inside of the pouch; and a pad cover that covers an upper portion and a front of the pad assembly and has a nozzle that sprays air toward the adsorption pad.

[0022] The manufacturing apparatus can be a part of an electrolyte injection apparatus, and can also be referred to as a pouch adsorption fixing device.

[0023] Preferably, the manufacturing apparatus includes a moving device that moves the pad assembly forward and backward with respect to the base.

[0024] When a pouch is introduced into an electrolyte injection apparatus, the pad assembly moves forward to adsorb and fix the pouch. The pad assembly can be symmetrically disposed on both sides of the electrolyte injection apparatus. When the pad assemblies on both sides approach the pouch to adsorb the pouch, an opening of the pouch can be opened to expand. The electrolyte can be easily injected in the expanded open state.

[0025] Thereafter, preferably, when the electrolyte injection is completed, the pad assembly releases the adsorption and moves backward. That is, preferably, the pad assembly is disposed such that the pad assembly moves forward to perform the electrolyte injection and returns backward after the electrolyte injection is completed.

[0026] Accordingly, the pad assembly can repeatedly perform the forward movement and the adsorption, and the release of the adsorption and the backward movement, thereby enabling the electrolyte injection process to be continuously and repeatedly performed.

[0027] Preferably, the nozzle is disposed to spray air in a downward diagonal line form from a front upper portion of the pad.

[0028] Preferably, the base is provided with a tray that accommodates electrolyte foreign matter that is separated from the pad and thus falls off due to the air spraying of the nozzle. Preferably, the tray is disposed to be detachable from the base, or is disposed to be able to be put in place and separated.

[0029] Preferably, a baffle or a barrier is disposed on both left and right sides of the base, the baffle or the barrier extending forward to block electrolyte foreign matter separated from the pad from spreading to the surrounding environment. The baffle can also perform a function of blocking electrolyte foreign matter splashed around the manufacturing apparatus from approaching the pad assembly.

[0030] Preferably, the base, the pad cover, the tray and the baffle block the diffusion of the electrolyte foreign matter in the pad assembly in up-down, left-right and front-back directions when the nozzle sprays air. The baffle can also prevent the diffusion or flow of the electrolyte foreign matter from the back of both left and right sides of the pad assembly.

[0031] Preferably, the pad cover is configured to be movable between an exposed position that exposes the front of the pad assembly and a covered position that covers the front of the pad assembly.

[0032] Preferably, the suction of the bag is performed at the exposed position of the pad cover by the pad assembly, and the air injection is performed at the covered position of the pad cover by the nozzle.

[0033] Preferably, the pad cover is configured to be movable up and down between the exposed position and the covered position with respect to the base. The pad cover can be raised to move to the exposed position and lowered to move to the covered position. Of course, the pad cover can also be configured to swing between the exposed position and the covered position.

[0034] Preferably, the base is provided with a guide tower that guides the raising and lowering of the pad cover.

[0035] The pad cover can be configured to slide on the guide tower.

[0036] The pad cover can include an upper cover that extends in a diagonal line from top to bottom to cover the upper portion of the pad assembly, and a front cover that extends downward from the upper cover to cover the front of the pad assembly.

[0037] Preferably, a plurality of suction pads are provided in the width direction of the pad assembly, and the width of the pad cover is greater than the width of the pad assembly.

[0038] Preferably, the pad cover includes a pneumatic pipe fixed by extending along the upper cover and the front cover, and the nozzle is connected to the end of the pneumatic pipe and is located on the upper portion of the front cover.

[0039] Preferably, the manufacturing device includes an electrolyte injection pipe that injects electrolyte into the bag, wherein the base, the pad assembly and the pad cover are provided on both sides centered on the injection pipe, respectively. That is, the manufacturing device can include an electrolyte injection device through the electrolyte injection pipe, and a bag suction device symmetrically provided on both sides of the electrolyte injection device.

[0040] To achieve the above object, according to one example of the present application, there can be provided a pouch-type secondary battery manufacturing apparatus including: a base which is recessed downward from an upper portion thereof toward a rear, thereby forming a recess having a front surface and a lower surface thereon; a pad assembly disposed in front of the front surface of the recess and having a suction pad which suctions a pouch in a horizontal direction to form an electrolyte injection path into an inside of the pouch; and a pad cover which covers an upper portion and a front of the pad assembly located in the recess and has a nozzle which sprays air toward the suction pad.

[0041] Preferably, a baffle extending transversely forward and disposed to surround the pad assembly is included on both left and right sides of the recess. Preferably, the baffles are respectively disposed on both sides of the recess.

[0042] Preferably, a tray is disposed on the lower surface of the recess, the tray accommodating electrolyte foreign matter separated from the suction pad.

[0043] Preferably, when the nozzle sprays air, the pad assembly is surrounded in up-down, left-right, and front-rear directions by the front surface of the recess, the pad cover, the tray, and the baffles.

[0044] To achieve the above object, according to one example of the present application, there can be provided a pouch-type secondary battery manufacturing apparatus including: a base; a pad assembly disposed in front of the base and having a suction pad which suctions a pouch in a horizontal direction to form an electrolyte injection path into an inside of the pouch; and a pad cover disposed to be movable between an exposed position which exposes a front of the pad assembly and a covered position which covers the front of the pad assembly.

[0045] In the exposed position state of the pad cover, the pad assembly can be moved forward to suction the pouch and then moved backward to return to its original position. That is, the pad cover can be excluded from a moving path of the pad assembly.

[0046] Before the pad assembly is moved forward, the pad cover is moved to the covered position to cover the front of the pad assembly. In particular, not only the front of the pad assembly but also an upper portion of the pad assembly can be covered. That is, when the pad assembly is surrounded by a certain space, the pad assembly can be cleaned using compressed air within the certain space. At this time, inflow of contaminants into the certain space can be prevented, or conversely, emission of contaminants outside the certain space can be prevented.

[0047] To achieve the above object, according to one example of the present application, a secondary battery manufacturing method can be provided, including: an electrolyte injection step of injecting an electrolyte into a bag by a pad assembly in an exposed position state of a pad cover and a suction position of the pad assembly; and a cleaning step of spraying compressed air to the pad assembly by a nozzle in a covering position state of the pad cover and a return position of the pad assembly.

[0048] The pad cover can move up and down or rotate between the exposed position and the covering position. The exposed position is a position in which the pad cover does not interfere with the movement of the pad assembly, and the covering position is a position in which the pad cover interferes with the movement of the pad assembly. That is, the covering position of the pad cover can be referred to as a position in which the pad cover interferes with the movement of the pad assembly between the suction position and the return position of the pad assembly. Accordingly, the pad cover can be in the covering position state when the pad assembly does not move.

[0049] The covering position of the pad cover can be a state in which the pad cover is positioned in front of the pad assembly. Accordingly, when the nozzle is provided on the pad cover, the spraying direction can be in front of the pad assembly. In particular, by spraying compressed air from the upper front of the pad assembly, the pad assembly can be effectively cleaned.

[0050] The electrolyte injection step can be repeatedly performed, and the cleaning step can be performed one-to-one with the electrolyte injection step. In addition, if the electrolyte injection step is performed a set number of times, or a preset condition such as a certain time elapsing is satisfied, the cleaning step can be performed. The performance of the cleaning step can be automatically controlled.

[0051] In the above example, it is preferable that the position of the pad cover can be interlocked with the movement of the pad assembly, or can be independently controlled. As one example, the pad cover can move to the covering position when the number of times of electrolyte injection reaches a certain number, or the pad cover can move to the covering position in a state in which electrolyte injection is stopped for more than a predetermined time.

[0052] Similarly, it is preferable that the cleaning of the pad assembly by the nozzle can be interlocked with the movement of the pad assembly, or can be independently controlled. As one example, the cleaning of the pad assembly by the nozzle can be performed when the number of times of electrolyte injection reaches a certain number. In addition, the cleaning of the pad assembly by the nozzle can be performed for a predetermined time in a state in which the pad cover moves to the covering position.

[0053] Advantageous Effects

[0054] By one example of the present application, a manufacturing apparatus and manufacturing method can be provided which can effectively prevent electrolyte foreign matter generated in an electrolyte injection process from being transferred to an adsorption device or an adsorption pad.

[0055] By one example of the present application, a manufacturing apparatus and manufacturing method can be provided which can effectively remove electrolyte foreign matter attached to an adsorption pad.

[0056] By one example of the present application, a manufacturing apparatus and manufacturing method can be provided which can effectively prevent electrolyte foreign matter removed when electrolyte foreign matter is removed from spreading to the surrounding environment.

[0057] By one example of the present application, a manufacturing apparatus and manufacturing method can be provided which can prevent an increase in time required for a manufacturing process by removing electrolyte contaminants using an idle period in a basic operation of an adsorption device or removing electrolyte contaminants only under certain conditions.

[0058] By one example of the present application, a manufacturing apparatus and manufacturing method can be provided which can be controlled so that installation and fixation of an injection position are made easier by mounting an injection nozzle on a pad cover and automatic cleaning is performed. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 FIG. 1 illustrates one example of a conventional pouch adsorption device,

[0060] Figure 2 FIG. 2 illustrates one example of a pouch-type secondary battery manufacturing apparatus according to one example of the present application,

[0061] Figure 3 FIG. 3 illustrates a state in which air is sprayed onto an adsorption pad after electrolyte injection is completed,

[0062] Figure 4 FIG. 4 illustrates a state in which an adsorption pad advances for injection of electrolyte and a pad cover moves to an exposed position,

[0063] Figure 5 FIG. 5 illustrates a state in which electrolyte is injected into a pouch by a manufacturing apparatus,

[0064] Figure 6 FIG. 6 illustrates a state in which an adsorption pad returns after electrolyte injection is completed and an adsorption pad and its surrounding environment are contaminated with electrolyte foreign matter,

[0065] Figure 7 FIG. 7 illustrates a state in which air is sprayed onto an adsorption pad contaminated with electrolyte foreign matter, and

[0066] Figure 8 FIG. 8 illustrates a state in which electrolyte foreign matter separated from an adsorption pad is accommodated in a tray. DETAILED DESCRIPTION

[0067] Hereinafter, an adsorption device according to one example of the present application will be described in detail with reference to the accompanying drawings.

[0068] Figure 2 The appearance of an adsorption device according to one example of the present application is illustrated, in which the adsorption device can be considered as a device that adsorbs and fixes a bag in a process of injecting an electrolyte into the bag.

[0069] The adsorption device 100 can be configured to include a base 110 that forms a reference. The base 110 is provided in a fixed frame shape, in which various configurations can be provided to be fixed or movable with reference to the base 110.

[0070] The base 110 can be formed in a box shape, and with Figure 1 Unlike the conventional base 11 shown, according to the present example, a recess 111 is preferably formed in the base 110. The recess 111 can be formed in a shape that is recessed toward the rear and downward from the upper front of the base 110. Due to the recess, the base 110 can have an "L" shape in cross section. Accordingly, the recess 111 can have a lower surface 114 and a front surface 115.

[0071] As described below, the recess 111 can form a space that surrounds the pad assembly 120. That is, the pad assembly 120 can be surrounded by the recess structure of the base 110 together with the pad cover 130 and the baffle 170.

[0072] The pad assembly 120 can have the same shape and structure as the conventional adsorption device. As one example, the pad assembly 120 can include a frame 121 and a plurality of adsorption pads 122 provided on the frame 121. The number of adsorption pads 122 can vary depending on the length or width of the bag to be adsorbed. A vacuum pipe can be connected to each adsorption pad, and the bag can be adsorbed by a vacuum.

[0073] The pad assembly 120 can be provided to move integrally forward and backward by the frame 121. The pad assembly 120 can be moved forward by driving the moving device 150, thereby adsorbing the bag in the vicinity of the bag. When this adsorption is performed, the opening of the bag can be opened, and then the electrolyte can be injected.

[0074] When the injection of the electrolyte is completed, the pad assembly 120 can be moved backward by driving the moving device 150. That is, it can be moved to the original position. The frame 121 of the pad assembly 120 can be connected to a plurality of shafts 151. The moving device can be a linear moving device. A linear driving force is transmitted through the shafts 151, so the pad assembly 120 can move integrally forward and backward.

[0075] The conventional pad assembly 120 is always exposed to the outside. In particular, it can be considered that the adsorption pad in the pad assembly 120 facing the front is very vulnerable to the inflow of electrolyte foreign matter from various directions. This can be said not only at the time of electrolyte injection but also after the injection is completed in the return state.

[0076] According to the present example, it is preferable to include a pad cover 130 capable of covering not only the adsorption pad but also the pad assembly 120.

[0077] The pad cover 130 can be provided to substantially cover the front of the adsorption pad. That is, in order to prevent foreign matter inflowing from the front of the adsorption pad from reaching the adsorption pad, the pad cover 130 can be provided. That is, the pad cover 130 can perform a baffle or guard function of blocking the movement path of foreign matter from the front.

[0078] The pad cover 130 can be provided to cover the upper portion of the adsorption pad. That is, in order to prevent foreign matter inflowing from the upper portion of the adsorption pad from reaching the adsorption pad, the pad cover 130 can be provided. That is, it can perform a baffle or guard function of blocking the movement path of foreign matter from the upper portion.

[0079] Therefore, according to the present example, it is possible to substantially prevent foreign matter from flowing into the pad assembly after the electrolyte injection is completed by the pad cover 130.

[0080] Here, it can be known that the pad cover 130 can perform a function of not only surrounding the adsorption pad but also surrounding the pad assembly and the surrounding components together. For this, it is preferable that the left and right widths of the pad cover 130 are greater than those of the pad assembly.

[0081] Specifically, the pad cover 130 can be formed to include an upper cover 131 extending to cover the upper portion of the pad assembly and a front cover 132 extending from the upper cover to the lower portion to cover the front of the pad assembly.

[0082] The upper cover 131 and the front cover 132 can be integrally formed. Therefore, the upper portion and the front of the pad assembly can be isolated or blocked from the surrounding environment by the pad cover 132.

[0083] The upper cover 131 can be formed by extending in a diagonal line form from the upper portion to the lower portion, and then the front cover 132 can extend downward. Preferably, the front cover can extend vertically downward. Here, the angle between the upper cover 131 and the front cover 132 can be an obtuse angle, but can also be a right angle or an acute angle. However, as illustrated, it is preferable that the upper cover 131 and the front cover 132 form an obtuse angle with each other. The reason is that, as described below, the pad cover 130 is provided with a pneumatic pipe, and thus a sharp bending of the pneumatic pipe can be prevented by the gentle connection between the upper cover 131 and the front cover 132.

[0084] The pad cover 130 can include a pad base 133. The pad base can be connected with the upper cover 131. Also, the pad base 133 can be integrally formed with the upper cover.

[0085] It is preferable that the pad cover 130 has a movable configuration. That is, this is because the pad cover 130 is provided to surround the pad assembly 120 after the electrolyte injection is completed, and it should not interfere with the pad assembly 120 suction bag in order to inject the electrolyte. That is, the pad cover 130 should be moved in order to inject the electrolyte. Therefore, it is preferable that the pad cover 130 is provided to be movable between a cover position and an exposed position.

[0086] The pad base 133 can be referred to as a moving center of the pad cover 130.

[0087] As one example, the pad base 133 can be provided to be movable up and down. When the pad base 133 rises, the entire pad cover 130 can rise. That is, when the pad cover 130 rises, the front of the pad assembly 120 can be completely exposed. In other words, a configuration that interferes or blocks the movement of the pad assembly 120 in the front can be excluded.

[0088] Therefore, the position in which the pad assembly 130 completely rises can be referred to as an exposed position. In addition, the position in which the pad assembly 130 completely descends can be referred to as a cover position. In the cover position, as shown, Figure 2 The pad cover 130 can completely block the front and the upper portion of the pad assembly 130.

[0089] The lifting of the pad cover 130 can be performed by a guide tower 112. The guide tower 112 can be provided on the base 110, and in particular, can be provided on the recess 111 described above. The guide tower 112 can be integrally provided with the base. The guide tower 112 can be provided to vertically extend.

[0090] The pad cover 130, and in particular, the pad base 133, can be provided to be movable up and down on the guide tower 112. That is, it can be moved up and down by sliding. For this, the guide tower 112 can be provided with an upper and lower sliding rail. Here, the pad cover 130 needs to perform not only a cover function but also an air injection function as described below. Therefore, considering the weight of the pad cover 130, it is preferable that there are at least two or more rails. By this, the pad cover 130 can stably move up and down. Also, the pad base 133 can be provided with a linear driving part so that it can linearly move through the sliding rail.

[0091] In addition, the pad cover 130 can move between the exposed position and the cover position by rotation as well as lifting. As one example, the pad base 133 can be rotated with respect to the guide tower or the base 110. If Figure 2The gasket cover 130 shown in the covering position can be rotated counterclockwise with respect to the gasket base 133. Through this rotation, the gasket cover 130 can be moved away from the front of the gasket assembly 120. That is, the gasket cover 130 can be moved to the exposing position.

[0092] Therefore, the mechanism for moving the gasket cover 130 between the covering position and the exposing position can be implemented in various ways.

[0093] According to the present example, in addition to being able to passively prevent the inflow of electrolyte foreign matter into the gasket assembly 120, electrolyte foreign matter can also be actively removed from the gasket assembly 120.

[0094] Specifically, according to the present example, a nozzle 140 that sprays air toward the adsorption gasket 122 can be provided. When there are a plurality of adsorption gaskets, a nozzle 140 is provided for each adsorption gasket, so that preferably there are a plurality of nozzles.

[0095] The nozzle 140 can be connected with a pneumatic pipe 141, and the pneumatic pipe 141 can be provided extending from the base 110 or the guide tower 112.

[0096] Preferably, the nozzle 140 is provided on the gasket cover 130. That is, the nozzle 140 is provided on the inner surface of the gasket cover 130 opposite the nozzle 140, so that compressed air is sprayed so that foreign matter adhering to the adsorption gasket 122 can be forcibly removed.

[0097] The pneumatic pipe 141 can extend along the gasket cover 130, and in particular, can extend along the upper cover 131 and the front cover 132. Of course, the pneumatic pipe 141 can be fixed along the inner surface of the gasket cover 130, and can also be buried inside the gasket cover 130.

[0098] As described above, since the gasket cover 130 has a configuration that moves between the covering position and the exposing position, the pneumatic pipe 141 is preferably a pipe made of a flexible material.

[0099] It can be said that electrolyte foreign matter adhering to the gasket cover 130 has a larger crystal size than splashed electrolyte foreign matter. Therefore, there is also a concern that foreign matter separated from the adsorption gasket by the sprayed air is transferred to surrounding components. To address this problem, according to the present example, it is preferable that the nozzle be provided to spray air in a diagonal form from top to bottom. That is, it is preferable that the nozzle be provided to spray air in a diagonal direction from the front upper portion of the adsorption gasket.

[0100] Foreign matter can be separated downward by air spraying, and according to the present example, a tray 160 for containing separated foreign matter can be provided.

[0101] Preferably, the tray 160 is located at the lower part of the pad assembly 120. In particular, it is preferred that the left-right width of the tray 160 is larger than the left-right width of the pad assembly, and the front-back width of the tray 160 is also larger than the front-back width of the pad assembly. This is to allow for sufficient accommodation of separated foreign objects in a wider area.

[0102] The pallet 160 can be placed on the pallet support surface 114. The pallet support surface 114 can be formed as a horizontal plane and can stably support the pallet 160.

[0103] As described above, it is preferable to form a recess 111 in the base 110. The tray support surface 114 can be formed through this recess 111. The user can install or remove the tray 160 from the front. Therefore, contaminants are concentrated in the tray 160, making the tray 160 easy to remove contaminants.

[0104] Furthermore, when air is ejected through nozzle 140, foreign matter may separate not only downwards but also in the left-right direction. In this case, the foreign matter may diffuse around the adsorption device 100, causing pollution to the surrounding environment.

[0105] Therefore, according to this example, baffles 171 and 172 can be provided on the left and right sides of the adsorption device 100. The left baffle 171 and the right baffle 172 can be arranged symmetrically to each other. For convenience, the left and right sides are designated based on the state of the adsorption pad 122 when viewed from the front.

[0106] like Figure 2 As shown, the left and right width of the pad assembly 120 is larger than the left and right width of the base 110. Therefore, when only the left and right portions of the pad assembly 120 are covered by baffles, the rear sides of the pad assembly 120 are open. Therefore, baffles 171 and 172 can be configured to cover not only the left and right sides of the pad assembly 120, but also the rear sides of the left and right sides.

[0107] Baffles 171 and 172 can be fixed to the base 110. Therefore, they can consistently prevent foreign objects from flowing into the left and right sides and rear of the left and right sides of the pad assembly 120. Conversely, this means that foreign objects can be prevented from splashing onto the left and right sides and rear of the left and right sides of the pad assembly 120 from the outside. Most of the splashed foreign objects can flow into the tray 160 and be contained therein.

[0108] In the following text, refer to Figures 3 to 8 The driving conditions and electrolyte injection process of an adsorption device according to an example of the present invention will be described in detail. For ease of explanation, the left baffle has been omitted.

[0109] Figure 3 The condition before the adsorption pad is activated is shown. Figure 4A state after driving the adsorption pad is shown.

[0110] As shown in Figure 3 , before driving the adsorption pad, the pad assembly 120 is located at an original position, and the pad cover 130 is also located at an original position or a covering position. Here, before driving the adsorption pad means a state before the adsorption pad 132 performs vacuum adsorption, and thus can be considered as a state before adsorbing the bag for electrolyte injection. This state can be referred to as an initial state.

[0111] In the initial state (step), the pad assembly 120 is surrounded by the pad cover 130 at the upper and front, the baffle 171, 172 at the left and right sides and the rear of the left and right sides, and the base 110 at the rear. In addition, the tray 160 is located at the lower portion of the pad assembly 120. In this case, air is sprayed toward the adsorption pad 122 through the nozzle. Foreign matter attached to the adsorption pad 122 is separated by the sprayed air, and the separated foreign matter moves downward to be accommodated in the tray 160. In addition, since the pad assembly 120 is surrounded by various configurations, it is possible to effectively prevent the separated foreign matter from splashing around the adsorption device. This air spraying can be performed for a preset time, and when the air spraying is completed, the next step can be entered.

[0112] As shown in Figure 4 , the pad assembly 120 moves forward to drive the adsorption pad. That is, when the initial state (step) is ended, the pad assembly 120 moves to an operating position. This forward movement of the pad assembly 120 can be performed by the moving device 150. When the forward movement of the pad assembly 120 is completed or in the process of the forward movement, a vacuum can be applied to the adsorption pad. That is, a vacuum for adsorbing the bag can be applied.

[0113] At this time, there is a concern that the pad cover 130 can interfere with the forward movement of the pad assembly 120. Therefore, the pad cover 130 should be moved from the covering position to the exposed position. As one example, the pad cover 130 can be raised to move to the exposed position. Since the pad cover 130 is located in front of the pad assembly 120, the movement of the pad cover 130 and the pad assembly 120 can be started at the same time, and the pad assembly 120 can move as the pad cover 130 moves first. In any case, interference between the moving pad assembly 120 and the pad cover 130 will be excluded.

[0114] Figure 5 A state in which electrolyte injection is performed in a state in which the pad assembly 120 completes the forward movement to adsorb the bag is illustrated.

[0115] As shown in the drawing, the adsorption devices 100 can be respectively provided on both sides with the bag 180 as a reference. That is, the adsorption devices can be symmetrically provided on both sides to perform the same driving. At this time, the state of the adsorption device can be the same as Figure 4The same is shown. The left suction device can suction one side of the bag, and the right suction device can suction the other side of the bag. In particular, it can suction the upper portion of the bag to form a path for injecting the electrolyte into the bag.

[0116] When the suction of the bag is completed, the electrolyte can be introduced into the bag 190 through the electrolyte injection tube 190. That is, after the suction of the bag is successfully completed, the electrolyte can be supplied through the electrolyte tube. Accordingly, the injection and stop of the electrolyte through the electrolyte injection tube 190 are repeatedly performed. Thereby, a part of the electrolyte can be transferred to the surrounding components. In particular, the electrolyte foreign matter can be attached to the suction pad 122. Further, the liquid electrolyte injection through the gravity dropping method makes the electrolyte likely to splash.

[0117] Figure 6 It is illustrated that the electrolyte splashed around the suction device and the electrolyte foreign matter attached to the suction pad after the electrolyte injection process is completed.

[0118] When the electrolyte injection process is completed, the pad assembly 120 returns to the original position, and the suction pad can be in a state of being contaminated by the electrolyte foreign matter in the original position. The crystalline electrolyte C having a relatively large particle can be attached to the suction pad. Then, the splashed electrolyte P can be located in the air above the front of the suction device 100. Here, as Figure 6 shown, the state in which the pad assembly 120 completes the original position can also be referred to as the completion of the electrolyte injection process.

[0119] As Figure 7 shown, when the return of the pad assembly 120 is completed, the pad cover 130 moves to the covering position. As one example, the pad cover 130 descends. Through the relative position and shape of the pad cover 130, it is possible to effectively prevent the splashed electrolyte P from flowing into the pad assembly 120.

[0120] When the pad cover 130 moves to the covering position or when the movement is completed, air is sprayed toward the suction pad 122 through the nozzle. That is, in a state in which the suction pad 122 is substantially surrounded by other components, air can be sprayed toward the suction pad.

[0121] Figure 8 It is illustrated that the state in which the crystalline electrolyte C is removed from the suction pad by the air spray. Since the air spray through the nozzle is performed in the diagonal direction from the front upper portion, the crystalline electrolyte C separated from the suction pad moves downward. In other words, the removed electrolyte foreign matter can move into the tray 160 and be contained.

[0122] As Figures 5 to 8 shown, it can be seen that the splashed electrolyte P during the electrolyte injection process, that is, the splashed electrolyte foreign matter, can be effectively prevented from substantially flowing into the pad assembly 120 due to the shape and position of the pad cover.

[0123] Further, as shown in Figure 7 and Figure 8 When air is sprayed toward the adsorption pad, the adsorption pad is surrounded by the pad cover, the baffle, the base, and the tray. Thus, it can be seen that the removed electrolyte foreign matter can be effectively prevented from being transferred or diffused to the surrounding environment to contaminate the surrounding environment.

[0124] Further, since the nozzle is installed and fixed by the pad cover, the spraying position can be easily set and fixed. Thus, cleaning by spraying can be automatically controlled.

[0125] Industrial applicability

[0126] which is described in the detailed description of the application.

Claims

1. A pouch-type secondary battery manufacturing apparatus comprising: a base; a pad assembly disposed in front of the base and having an adsorption pad that adsorbs a pouch in a horizontal direction to form an electrolyte injection path into an inside of the pouch; and a pad cover that covers an upper portion and a front of the pad assembly and has a nozzle that sprays air toward the adsorption pad. 2.The pouch-type secondary battery manufacturing apparatus according to claim 1, characterized in that comprising a moving device that moves the pad assembly forward and backward with respect to the base. 3.The pouch-type secondary battery manufacturing apparatus according to claim 2, characterized in that the pad assembly is disposed so that the pad assembly moves forward to perform electrolyte injection and returns backward after the electrolyte injection is completed. 4.The pouch-type secondary battery manufacturing apparatus according to claim 3, characterized in that the nozzle is disposed to spray air in a downward diagonal line from a front upper portion of the pad. 5.The pouch-type secondary battery manufacturing apparatus according to claim 4, characterized in that the base is provided with a tray that accommodates electrolyte foreign matter that is separated from the pad to fall due to air spraying of the nozzle. 6.The pouch-type secondary battery manufacturing apparatus according to claim 5, characterized in that baffles are provided on both left and right sides of the base, the baffles extend forward to block the electrolyte foreign matter separated from the pad from diffusing to the surrounding environment. 7.The pouch-type secondary battery manufacturing apparatus according to claim 6, characterized in that the electrolyte foreign matter in the pad assembly is blocked from diffusing in upward and downward, left and right, and forward and backward directions by the base, the pad cover, the tray, and the baffles when the nozzle sprays air. 8.The pouch-type secondary battery manufacturing apparatus according to claim 2, characterized in that the pad cover is disposed to be movable between an exposed position that exposes a front of the pad assembly and a covered position that covers the front of the pad assembly. 9.The pouch-type secondary battery manufacturing apparatus according to claim 8, characterized in that adsorption of the pouch is performed by the pad assembly at the exposed position of the pad cover, and air spraying is performed by the nozzle at the covered position of the pad cover. 10.The pouch-type secondary battery manufacturing apparatus according to claim 9, characterized in that the pad cover is disposed to be movable upward and downward with respect to the base between the exposed position and the covered position. 11.The pouch-type secondary battery manufacturing apparatus according to claim 10, characterized in that the base is provided with a guide tower that guides lifting of the pad cover. 12.The pouch-type secondary battery manufacturing apparatus according to claim 11, characterized in that the pad cover is disposed to slide on the guide tower. 13.The pouch-type secondary battery manufacturing apparatus according to claim 8, characterized in that the pad cover comprises: an upper cover that extends in a diagonal line from above downward to cover an upper portion of the pad assembly; and a front cover that extends downward from the upper cover to cover a front of the pad assembly. 14.The pouch-type secondary battery manufacturing apparatus according to claim 13, characterized in that a plurality of adsorption pads are disposed in a width direction of the pad assembly, and a width of the pad cover is greater than a width of the pad assembly. 15.The pouch-type secondary battery manufacturing apparatus according to claim 1, characterized in that an electrolyte injection tube that injects an electrolyte into the pouch, wherein the base, the pad assembly, and the pad cover are disposed on both sides of the injection tube, respectively.

16. A method for manufacturing a secondary battery, characterized by comprises: a step of absorbing the pouch by the pad assembly to inject an electrolyte into the pouch in an exposed position state of the pad cover and an absorbing position of the pad assembly; and a cleaning step of spraying compressed air to the pad assembly by a nozzle to clean the pad assembly in a covering position state of the pad cover and a return position of the pad assembly, wherein the covering position of the pad cover is a position where the pad cover interferes with the pad assembly to move between the absorbing position and the return position of the pad assembly, and the nozzle is disposed on the pad cover.

17. A pouch-type secondary battery manufacturing apparatus comprising: a base that is concave downward from an upper front portion, thereby forming a recess having a front surface and a lower surface thereon; a pad assembly disposed in front of the front surface of the recess and having an absorbing pad that absorbs a pouch in a horizontal direction to form an electrolyte injection path into an inside of the pouch; and a pad cover that covers an upper portion and a front portion of the pad assembly located in the recess and has a nozzle that sprays air toward the absorbing pad.

18. The secondary battery manufacturing apparatus according to claim 17, characterized in that comprises a baffle that extends laterally forward and is disposed to surround the pad assembly on both sides of the recess.

19. The secondary battery manufacturing apparatus according to claim 18, characterized in that a tray is disposed on the lower surface of the recess, the tray accommodating electrolyte foreign matter separated from the absorbing pad.

20. The pouch-type secondary battery manufacturing apparatus according to claim 19, characterized in that the pad assembly is surrounded in up-down, left-right, and front-back directions by the front surface of the recess, the pad cover, the tray, and the baffle when the nozzle sprays air.

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