WO2019147075A1

WO2019147075A1 - Injection nozzle assembly, and apparatus and method for manufacturing secondary battery using same

Info

Publication number: WO2019147075A1
Application number: PCT/KR2019/001112
Authority: WO
Inventors: 이세용; 전성진
Original assignee: (주)엔에스
Priority date: 2018-01-26
Filing date: 2019-01-25
Publication date: 2019-08-01

Abstract

The present invention relates to an injection nozzle assembly comprising: a nozzle body comprising a first receiving space, an inlet port through which an injection solution supplied from an external supply source flows into the first receiving space, and a first outlet port through which the injection solution is discharged from the first receiving space; a needle having a head equipped so as to open and close the first outlet port; and an elastic member which, in the case where the hydraulic pressure of the injection solution flowing into the first receiving space is the same as or greater than a predetermined reference hydraulic pressure, elastically biases the needle, so that the head is spaced apart from the first outlet port, and the first outlet port is open.

Description

Injection nozzle assembly, and apparatus and method for manufacturing secondary battery using the same

The present invention relates to an injection nozzle assembly for injecting an electrolyte into a secondary battery, and an apparatus and a method for manufacturing a secondary battery using the same.

As the use of portable electric appliances such as video cameras, portable phones, and portable PCs is being activated, the importance of secondary batteries, which are mainly used as driving power sources, is increasing.

Unlike a non-rechargeable primary battery, a rechargeable secondary battery can be charged and discharged according to the development of advanced fields such as a digital camera, a cellular phone, a laptop computer, a power tool, an electric bicycle, an electric vehicle, a hybrid vehicle, Active research is underway.

In particular, the lithium secondary battery has a higher energy density per unit weight and can be rapidly charged as compared with other secondary batteries such as lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries and nickel-zinc batteries. It is actively proceeding.

The lithium secondary battery has an operating voltage of 3.6 V or higher and is used as a power source for a portable electronic device or a plurality of batteries connected in series or in parallel to a high output electric vehicle, a hybrid vehicle, a power tool, an electric bicycle, Is used.

The lithium secondary battery can be classified into a lithium ion battery using a liquid electrolyte and a lithium ion polymer battery using a polymer solid electrolyte depending on the type of electrolyte. The lithium ion polymer battery can be classified into a fully solid lithium ion polymer battery containing no electrolytic solution and a lithium ion polymer battery using a gel polymer electrolyte containing an electrolyte depending on the kind of the polymer solid electrolyte .

The lithium ion battery is generally used in the form of a cylinder or a rectangular metal can as a container and welded and sealed. Since the can type secondary battery using such a metal can as a container is fixed in shape, there is a disadvantage that it restricts the design of an electrical product using the metal can as a power source, and it is difficult to reduce the volume. Accordingly, a pouch type secondary battery in which an electrode assembly and an electrolyte are sealed in a film pouch packaging material has been developed and used.

On the other hand, in general, the injection process of injecting a liquid electrolyte (hereinafter referred to as "electrolyte") into a lithium ion battery is performed in a vacuum atmosphere. Since the air existing in the electrode, the separation membrane, and the interface between the electrode and the separation membrane can be removed, the electrolyte can be easily penetrated into the hollow space of the electrode assembly, Can be increased. However, when the injection process is carried out in a vacuum atmosphere using a conventional injection nozzle, the vacuum pressure acts as a disturbance to the liquid pressure of the electrolytic solution supplied from the external supply source of the electrolyte, so that the phenomenon that the liquid pressure of the electrolytic solution can not be maintained constant is frequently Respectively. Therefore, according to the conventional injection nozzle, it is difficult to uniformly inject the electrolyte solution into the electrode assembly by a predetermined amount, and the quality of the lithium ion battery can not be uniformized.

On the other hand, conventionally, the above-described implantation step and the impregnation step of impregnating the electrode assembly into the lithium ion battery with the electrolyte solution were carried out in separate apparatuses, respectively. Thus, conventionally, it takes a long time to proceed with the electrolytic solution injecting step and the impregnating step, and the productivity of the secondary battery is deteriorated.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an injection nozzle assembly improved in that an electrolyte can be uniformly injected into an electrode assembly by a predetermined amount, and an apparatus and method for manufacturing a secondary battery using the same. have.

Further, it is an object of the present invention to provide an apparatus and a method for manufacturing a secondary battery, which are improved to reduce the time required for the process of injecting and impregnating an electrolyte solution.

It is still another object of the present invention to provide an apparatus and a method for manufacturing a secondary battery that can improve the injection and impregnation performance of an electrolyte solution into a secondary battery.

According to an aspect of the present invention, there is provided an injection nozzle assembly including a first accommodation space, an inlet for introducing the injection solution supplied from an external supply source into the first accommodation space, A nozzle body including a first outlet for discharging the air from the first accommodating space; A needle having a head provided so as to be capable of opening and closing the first outlet; And an elastic member for elastically biasing the needle such that the head is spaced apart from the first outlet so that the first outlet is opened when the fluid pressure of the infusion liquid flowing into the accommodation space is equal to or higher than a predetermined reference fluid pressure.

Preferably, the needle includes a shaft connected to the head, at least a portion of which is inserted into the first accommodation space through a first outlet, and a flange connected to the shaft and received in the first accommodation space, , The elastic member is composed of an elastic spring interposed between the inner side surface of the first accommodation space and the flange.

Preferably, the first outlet has a first contact surface provided on an inner circumferential surface so as to face the head, and the head has a second contact surface provided on the outer circumferential surface to contact the first contact surface to close the first discharge port .

Preferably, the first contact surface and the second contact surface each have a conical surface shape whose diameter progressively decreases toward the first accommodation space.

Preferably, the elastic member elastically biases the needle so that the second contact surface is spaced from the first contact surface and the first outlet is opened when the hydraulic pressure is equal to or higher than the reference hydraulic pressure.

Preferably, the shaft includes at least one guide groove formed in the outer peripheral surface so as to guide the injection liquid introduced into the first accommodation space to the first discharge port.

Preferably, the apparatus further comprises a second accommodating space in which at least a portion of the head is accommodated so that the injected liquid discharged from the first outlet is received, and a second outlet for discharging the injected liquid introduced into the second accommodating space to the outside And further includes a nozzle cap.

Preferably, the head has a first guide surface provided on the outer circumferential surface so as to face the nozzle cap, and the second accommodation space is spaced apart from the first guide surface by a predetermined gap, And a second guide surface provided on the inner circumferential surface to form a guide passage for guiding the guide passage to the second discharge port.

Preferably, the first guide surface and the second guide surface each have a conical shape whose diameter progressively decreases toward the second discharge port.

Preferably, the nozzle body further includes a nozzle communicating hole for communicating the outside with the second accommodating space, wherein the injecting liquid mounted in the nozzle communicating hole and remaining in the second accommodating space is passed through the second outlet And a dischargeable purge member.

Preferably, the purge member has a gas pump capable of supplying a purge gas supplied from an external gas supply source to the nozzle communication port.

Preferably, the gas pump is operated to supply the purge gas when the first outlet is closed.

Preferably, the purge member further includes an on-off valve capable of opening and closing the nozzle communication port.

According to another aspect of the present invention, there is provided an injection nozzle assembly for injecting an electrolyte into a secondary battery accommodated in an internal space of a processing chamber, A nozzle body having an inlet for introducing the electrolyte supplied from the electrolyte supply source into the first accommodation space and a first outlet for discharging the electrolyte from the first accommodation space; At least a portion of which is accommodated in the first accommodating space through the first outlet; a head provided at one end of the shaft so as to open and close the first outlet; A needle provided on the flange; And an elastic member interposed between the inner surface of the first accommodating space and the flange and spaced apart from the first outlet when the liquid pressure of the electrolytic solution is equal to or greater than a predetermined reference fluid pressure so that the first outlet is opened, And includes a biasing elastic spring.

Preferably, the apparatus further comprises a second accommodating space in which at least a portion of the head is accommodated to allow the electrolyte discharged from the first outlet to be introduced, and a second outlet for injecting the electrolyte introduced into the second accommodating space into the secondary battery And the nozzle cap.

Preferably, the nozzle body further includes a nozzle communicating hole for communicating the outside with the second accommodating space, wherein the nozzle body communicates with the nozzle communicating hole through the second accommodating space, Further comprising a purge member as far as possible.

Preferably, the purge member includes: a bypass line connecting the chamber communication port formed in one side wall of the processing chamber and the nozzle communication port so as to communicate with the internal space of the processing chamber; Valve.

Preferably, the nozzle body is engaged with the processing chamber to close the opening of the processing chamber.

The present invention relates to an injection nozzle assembly and an apparatus and method for manufacturing a secondary battery using the same.

First, the present invention can prevent the liquid pressure of the electrolyte from being disturbed by the vacuum pressure when the electrolyte is injected into the secondary battery in a vacuum atmosphere, and uniformly injecting the electrolyte solution into the secondary battery by a predetermined amount, Can be made uniform.

Second, the present invention prevents the electrolyte from remaining in the internal flow path by adjusting the pressure of the internal flow path of the injection nozzle assembly or supplying the purge gas to the internal flow path, and the electrolyte remains in the internal flow path, It is possible to prevent the amount of the electrolytic solution injected into the electrolytic bath 1 from becoming uneven.

Third, since the injecting process and the impregnating process of the electrolyte solution can be performed together in the same processing chamber, the time required for manufacturing the secondary battery can be reduced.

Fourth, since the pressure of the inner space of the processing chamber can be easily adjusted according to the injection pattern and impregnation pattern of the electrolyte, the injection performance and the impregnation performance of the electrolyte can be improved through the present invention.

1 is a partial cross-sectional view showing a schematic configuration of a secondary battery manufacturing apparatus according to a first embodiment of the present invention;

2 is a partially enlarged view of the region I of Fig. 1;

3 is a partial cross-sectional view showing an aspect of injecting an electrolyte solution into the secondary battery using the secondary battery manufacturing apparatus shown in FIG.

4 is a partially enlarged view of the region II of Fig. 3; Fig.

FIG. 5 is a partial cross-sectional view showing an aspect of purging the electrolyte remaining in the injection nozzle assembly shown in FIG. 1; FIG.

FIG. 6 is a flow chart for explaining a method of advancing an electrolyte injection process and an impregnation process using the secondary battery manufacturing apparatus shown in FIG. 1;

7 is a flow chart for explaining the electrolytic solution impregnation step shown in FIG.

8 is a partial cross-sectional view showing a schematic configuration of a secondary battery manufacturing apparatus according to a second embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

1 is a partial cross-sectional view showing a schematic configuration of a secondary battery manufacturing apparatus according to a first embodiment of the present invention.

The apparatus for manufacturing a secondary battery 1 according to the first embodiment of the present invention comprises an injection step of injecting an electrolyte solution E into a secondary battery 2 and a step of injecting the electrolyte solution E injected into the secondary battery 2 into an electrode assembly So that the impregnation process can be performed. 1, the secondary battery manufacturing apparatus 1 includes a controller (not shown) for controlling the overall drive of the secondary battery manufacturing apparatus 1, a controller (not shown) for controlling the overall operation of the secondary battery manufacturing apparatus 1 A vacuum unit 20 capable of reducing the pressure in the processing chamber 10; a pressing unit 30 provided so as to be capable of pressing the processing chamber 10; And an injection nozzle assembly 50 capable of injecting an electrolyte solution E into the secondary battery 2 accommodated in the processing chamber 10. The vent unit 40 may be provided in the processing chamber 10 so as to be able to ventilate.

First, the controller is provided so as to be able to control various components included in the secondary battery manufacturing apparatus 1 so as to perform an injection process and an impregnation process of the electrolytic solution E. For example, the controller can selectively drive the vacuum unit 20, the pressurizing unit 30 and the vent unit 40, respectively, so that the atmospheric pressure of the inner space 10a of the processing chamber 10 can be adjusted have.

Next, the processing chamber 10 may include an internal space 10a, an opening 10b, a chamber communication port 10c, and the like.

The internal space 10a is formed at least a part of the injection nozzle assembly 50 and the interior of the processing chamber 10 so that the secondary battery 2 can be received. The secondary battery 2 is preferably mounted on the bottom surface of the internal space 10a, but is not limited thereto.

Next, the opening 10b is formed at one side of the processing chamber 10 so that the injection nozzle assembly 50 can be mounted. The second body 70b of the nozzle body 70, which will be described later, may be disposed in the opening 10b.

Next, the chamber communication hole 10c is formed so as to pass through the wall surface of the processing chamber 10 so as to communicate the inner space 10a with the outside of the processing chamber 10 (hereinafter referred to as "the outside"). The number of the chamber communication holes 10c and the forming position are not particularly limited. For example, the chamber communication hole 10c may include a first chamber communication port 10d through a fourth chamber communication port 10g, which are formed through one side wall or another side wall of the processing chamber 10, respectively have. A bypass line 111 of a purge member 110 to be described later may be connected to the first chamber communication port 10d and a vacuum line 22 of a vacuum unit 20 to be described later may be connected to the second chamber communication port 10e. Can be connected. A pressurizing line 32 of a pressurizing unit 30 to be described later may be connected to the third chamber communication port 10f and a vent line 42 of the vent unit 40 to be described later may be connected to the fourth chamber communication port 10g. ) Can be connected.

Next, the vacuum unit 20 is provided so that the internal space 10a of the processing chamber 10 can be decompressed. 1, the vacuum unit 20 includes a vacuum line 22 connected to the second chamber communication port 10e so as to communicate the inside space 10a with the outside, Off valve 24 installed in the vacuum line 22 so as to be able to open and close the chamber 22 and a gas such as air and purge gas G contained in the internal space 10a are exhausted through the vacuum line 22, And a vacuum pump 26 installed in the vacuum line 22 so that the space 10a can be depressurized.

The controller can control the driving of the vacuum unit 20 to depressurize the internal space 10a. For example, the controller can control the driving of the vacuum unit 20 so that a vacuum atmosphere is formed in the inner space 10a when the electrolyte solution E is injected and the impregnation step is performed.

Next, the pressurizing unit 30 is provided so as to be capable of pressing the inner space 10a of the processing chamber 10. 1, the pressurizing unit 30 includes a pressurizing line 30 connected to the third chamber communication port 10f for communicating the internal space 10a and the external pressurized gas supply source S1, for example, An open / close valve 34 provided in the pressurizing line 32 so as to open and close the pressurizing line 32; and an open / close valve 34 which opens / closes the pressurizing line 32 through the pressurizing line 32, And a pressurizing pump 36 which is filled in the inner space 10a to be able to pressurize the inner space 10a. The kind of gas usable as the pressurized gas is not particularly limited. For example, the pressurized gas may include at least one of nitrogen, air, and an inert gas.

The controller can control the driving of the pressing unit 30 to press the inner space 10a. For example, the controller can control the driving of the pressing unit 30 so that a pressurized atmosphere is formed in the inner space 10a when the electrolyte solution E is subjected to the instilling step and the impregnating step.

Next, the vent unit 40 is provided so as to be capable of forming an atmospheric pressure atmosphere in the inner space 10a of the processing chamber 10. 1, the vent unit 40 includes a vent line 42 connected to the fourth chamber communication port 10g so as to communicate the inside space 10a with the outside, Off valve 44 installed on the vent line 42 to open and close the valve 42, and the like.

The controller can control the driving of the vent unit 40 so that the inner space 10a and the outside communicate with each other and an atmospheric pressure atmosphere is formed in the inner space 10a when the electrolyte solution E is subjected to the instilling step and the impregnating step have.

FIG. 2 is a partial enlarged view of the region I of FIG. 1, FIG. 3 is a partial cross-sectional view showing an aspect of injecting an electrolyte into the secondary battery using the secondary battery manufacturing apparatus shown in FIG. 1, And FIG. 5 is a partial cross-sectional view showing an aspect of purging the remaining electrolyte inside the injection nozzle assembly shown in FIG.

Next, the injection nozzle assembly 50 may include a nozzle body 70, a needle 80, an elastic member 90, a nozzle cap 100, a purge member 110, and the like.

The nozzle body 70 includes an electrolyte E for injecting into the secondary battery 2 and a purge gas G for removing the electrolyte E remaining in the internal flow path of the injection nozzle assembly 50, And the purge gas supply source S3, respectively. 1, the nozzle body 70 may include a first body 70a, a second body 70b, and the like.

The first body 70a is provided to constitute the upper part of the nozzle body 70. [ The first body 70a is seated at a predetermined position on the upper surface of the second body 70b and can be engaged with the second body 70b by bolts or other joining members. 1, the first body 70a has a first groove 71a, an inlet port 72, a nozzle communication port 73, a first connection channel 74, and the like have.

The first groove 71a may be recessed in the lower portion of the first body 70a so as to have a predetermined volume. The first groove 71a coincides with the second groove 71b of the second body 70b to be described later and is provided with a first accommodating space 75 for accommodating the needle 80 and the elastic member 90, Can be formed.

The inlet 72 may be formed on the upper portion of the first body 70a to communicate with the first groove 71a. The inlet port 72 may be connected to the external electrolyte supply source S2 by an electrolyte supply line 60. Therefore, the electrolyte solution E supplied from the electrolyte solution supply source S2 can be introduced into the first accommodation space 75 through the inlet port 72. The electrolytic solution supply line 60 is provided with an on-off valve 62 capable of opening and closing the electrolytic solution supply line 60 and an electrolytic solution pump 64 capable of pumping the electrolytic solution E supplied from the electrolytic solution supply source S2 .

The nozzle communication hole 73 may be formed on the upper portion of the first body 70a so as to communicate with the outside. The number of the nozzle communication holes 73 and the forming position are not particularly limited. For example, the nozzle communicating port 73 includes a first nozzle communication port 73a formed on the upper portion of the first body 70a so as to be spaced apart from the inlet port 72 by a predetermined distance in one direction, And a second nozzle communicating hole 73b formed on the upper portion of the first body 70a so as to be spaced apart from each other by a predetermined distance in the other direction.

The first nozzle communication port 73a is connected to the first chamber communication port 10d of the processing chamber 10 by the bypass line 111 of the purge member 110 to be described later, And can communicate with the inner space 10a.

The second nozzle communication port 73b can be connected to an outside purge gas supply source S3 by a gas line 114 of a purge member 110 to be described later. Therefore, the purge gas G supplied from the purge gas supply source S3 can be introduced into the second nozzle communication port 73b.

The first connection passage 74 is communicated with the first nozzle communication port 73a and the second nozzle communication port 73b and is formed to penetrate the first body 70a in the thickness direction. The first connection passage 74 preferably has an annular shape surrounding the first groove 71a, but the present invention is not limited thereto. The purge gas G introduced into the second nozzle communication port 73b may be transmitted to the first connection channel 74. [

The second body 70b is provided to constitute the lower portion of the nozzle body 70. [ To this end, the upper surface of the second body 70b may have a shape corresponding to the lower surface of the first body 70a so that the lower surface of the first body 70a can be seated. The second body 70b can be mounted to the processing chamber 10 to close the opening 10b of the processing chamber 10. [ To this end, the second body 70b may be coupled to the processing chamber 10 by bolts (B) or other coupling members. 1, the second body 70b includes a second groove 71b, a first outlet 76, a second connection passage 77, a first connection surface 78, .

The second groove 71b may be recessed on the upper portion of the second body 70b so as to have a predetermined volume. The second groove 71b may be aligned with the first groove 71a of the first body 70a to form the first accommodation space 75. [ The lower portion of the second groove 71b preferably has a shape corresponding to the elastic member 90 so as to support the elastic member 90, but is not limited thereto.

The first outlet 76 may be formed in the lower portion of the second body 70b to communicate with the second groove 71b. 2, a protrusion 70c protrudes from the lower portion of the second body 70b, and the first outlet 76 extends to the inside of the protrusion 70c. 2, the first discharge port 76 may have a first contact surface 79 provided at a lower portion of the inner circumferential surface so as to face a second contact surface 84 of the head 81 described later. The first contact surface 79 may have a conical shape whose diameter gradually decreases toward the first housing space 75.

2 and 4, this first outlet 76 is configured such that the first contact surface 79 and the second contact surface 84 are in contact with each other and are closed or the first contact surface 79 and the second contact surface 79 The electrolyte solution E flowing into the first accommodation space 75 can be selectively discharged to the guide passage 106 of the nozzle cap 100 to be described later.

3, the second connection passage 77 is formed over the upper and lower portions of the second body 70b so as to communicate with the first connection passage 74. As shown in FIG. A plurality of second connection flow paths 77 may be formed at predetermined intervals so as to surround the first accommodation space 75 and the first discharge port 76. The purge gas G introduced into the first connection channel 74 may be transmitted to the second connection channel 77.

4, the first connection surface 78 is formed over the lower surface of the second body 70b and the outer peripheral surface of the protrusion 70c so as to be connected to the second connection flow path 77. As shown in FIG. The first connection surface 78 and the second connection surface 103 of the nozzle cap 100 described later can form a third connection path 105 communicating with the second connection path 77 . The purge gas G introduced into the second connection passage 77 may be transmitted to the third connection passage 105.

Next, the needle 80 is provided so as to selectively open and close the first discharge port 76 of the nozzle body 70. 3, the needle 80 may include a head 81, a shaft 82, a flange 83, and the like.

The head 81 is provided so as to be capable of opening and closing the first discharge port 76 of the nozzle body 70. 2, the head 81 may include a second contact surface 84, a first guide surface 85, and the like.

The second contact surface 84 is formed on the outer peripheral surface of the upper portion of the head 81 so as to be selectively in contact with the first contact surface 79. For example, the second contact surface 84 may have a conical shape such that the diameter progressively decreases toward the first housing space 75 of the nozzle body 70, such as the first contact surface 79. 2 and 4, this second contact surface 84 may be in contact with the first contact surface 79 or spaced from the first contact surface 79, depending on the manner of operation of the needle 80, The discharge port 76 can be selectively opened and closed. 2, it is preferable that an O-ring 86 which can seal between the first contact surface 79 and the second contact surface 84 is provided on the second contact surface 84. However, no.

The first guide surface 85 is formed on the outer peripheral surface of the lower portion of the head 81 so as to face the second guide surface 104 of the nozzle cap 100 to be described later. As shown in FIG. 2, the first guide surface 85 preferably has a conical shape whose diameter gradually decreases toward the second outlet 102 of the nozzle cap 100, which will be described later. However, no. The first guide surface 85 is formed with the second guide surface 104 of the nozzle cap 100 along with the electrolyte E or purge gas introduced into the second accommodation space 101 of the nozzle cap 100 G) to the second discharge port 102 can be formed.

The shaft 82 extends from the top of the head 81 to be connected to the second contact surface 84. The shaft 82 is provided such that at least a portion of the shaft 82 can be inserted into the first accommodating space 75 through the first outlet 76. 3, the shaft 82 has a lower end portion movably inserted into the first outlet port 76 and an upper end portion passing through the first outlet port 76 to be inserted into the first accommodation space 75 The first outlet 76 may have a smaller diameter than the first outlet 76 and a longer length than the first outlet 76. [

The shaft 82 may have at least one guide groove 87 formed in the outer circumferential surface so as to guide the electrolyte solution E introduced into the first accommodation space 75 to the first outlet 76. 4, when the first contact surface 79 and the second contact surface 84 are separated from each other and the first outlet 76 is opened, the electrolytic solution (electrolytic solution E may be guided through the guide grooves 87 to the first outlet 76 and discharged through a gap formed between the first contact surface 79 and the second contact surface 84.

3, the flange 83 is connected to the upper portion of the shaft 82 and is accommodated in the first accommodation space 75. As shown in Fig. The flange 83 is formed to have a larger diameter than the first outlet 76. Such a flange 83 can prevent the shaft 82 from being disengaged through the first outlet 76 and can support one end of the elastic member 90 to be described later.

The elastic member 90 is arranged so that the first discharge port 76 of the nozzle body 70 is opened only when the liquid pressure of the electrolyte E flowing into the first accommodation space 75 is equal to or higher than a predetermined reference fluid pressure, The needle 80 is elastically biased to the opposite side of the first outlet 76, that is, toward the inlet 72 of the nozzle body 70. [ Here, the liquid pressure refers to the pressure at which the electrolytic solution E introduced into the first accommodation space 75 pushes the needle 80 toward the second outlet 102 of the nozzle cap 100.

The structure of the elastic member 90 is not particularly limited. 3, the elastic member 90 may be an elastic spring interposed between the lower surface of the flange 83 and the bottom surface of the first accommodating space 75. As shown in Fig. The elastic spring is preferably a compression coil spring, but is not limited thereto. The elastic member 90 is preferably installed such that the upper end of the shaft 82 is inserted into the hollow of the elastic member 90, but the present invention is not limited thereto.

According to the elastic member 90, the needle 80 is elastically pressed toward the inlet port 72 by the elastic pressure of the elastic member 90. The needle 80 is sucked toward the second outlet 102 of the nozzle cap 100 by the internal pressure of the internal space 10a when a vacuum atmosphere is formed in the internal space 10a of the processing chamber 10 And is pressurized toward the inlet port 72 by the internal pressure of the internal space 10a when a pressurized atmosphere is formed in the internal space 10a of the processing chamber 10. Here, the vacuum atmosphere means a state in which the inner pressure of the inner space 10a is lower than the atmospheric pressure, and the pressurized atmosphere means a state in which the inner pressure of the inner space 10a is higher than atmospheric pressure. The needle 80 is urged toward the second outlet 102 of the nozzle cap 100 by the fluid pressure of the electrolyte E flowing into the first accommodation space 75. [

P _e : Fluid pressure of electrolyte

P _i : the inner pressure of the inner space of the processing chamber

P _s : elastic pressure of the elastic member

P _e : Fluid pressure of electrolyte

P _i : the inner pressure of the inner space of the processing chamber

P _s : elastic pressure of the elastic member

The sum of the internal pressure (P _i) of the fluid pressure (P _e) and the internal space (10a) of the as shown in Equation 1, when the inner space (10a) of the processing chamber 10, a vacuum atmosphere is formed, the electrolyte (E) the first outlet being in contact state is maintained of the elastic member 90, the elastic pressure (P _s) than is the first contact surface by the elastic pressure of the elastic member 90 (P _s) (79) and the second contact surface 84 of the (76) is closed. When the vacuum atmosphere is formed in the inner space 10a of the processing chamber 10 as shown in the formula (2), the liquid pressure P _e of the electrolyte E and the inner pressure P _i of the inner space 10a If the sum exceeds the elastic pressure (P _s) of the elastic member 90, the needle 80, the second discharge port by internal pressure (P _i) of the electrolyte (e) the hydraulic pressure (P _e) and the internal space (10a) of the ( 102 so that the first outlet 76 is opened.

P _e : Fluid pressure of electrolyte

P _i : the inner pressure of the inner space of the processing chamber

P _s : elastic pressure of the elastic member

P _e : Fluid pressure of electrolyte

P _i : the inner pressure of the inner space of the processing chamber

P _s : elastic pressure of the elastic member

When the pressurized atmosphere is formed in the inner space 10a of the processing chamber 10 as shown in the formula (3), the fluid pressure P _e of the electrolyte solution E becomes equal to the inner pressure P _i of the inner space 10a, (P _i ) of the inner space 10 a and the elastic pressure P _s of the elastic member 90 when the sum of the elastic force P _s of the elastic member 90 and the elastic force P _s of the elastic member 90 is less than the sum of the elastic force P _s of the elastic member 90, The first discharge port 76 is closed by maintaining the contact state of the first discharge port 84. In addition, as shown in Equation 4, when the pressurized atmosphere formed in the interior space (10a) of the processing chamber 10, the internal pressure of the fluid pressure (P _e) an internal space (10a) of the electrolyte (E), (P _i) and If it exceeds the sum of the acoustic pressure (P _s) of the elastic member 90 has a first outlet (76) by being moved towards the second outlet port 102 by the needle 80, the fluid pressure (P _e) of the electrolyte (e) Is opened.

Thus, the needle (80), a first outlet in accordance with the magnitude of the fluid pressure (P _e), the internal pressure (P _i) and the elastic pressure (P _s) of the elastic member 90 of the inner space (10a) of the electrolyte (E) (76). In consideration of this, it is preferable that the elastic member 90 is provided so that the first outlet 76 can be selectively opened only when the liquid pressure of the electrolytic solution E is equal to or higher than the reference fluid pressure.

The nozzle cap 100 is provided to inject the electrolyte E discharged from the first discharge port 76 of the nozzle body 70 into the secondary battery 2. The nozzle cap 100 can be coupled to a predetermined position on the lower surface of the second body 70b by the bolts B and other engagement members. 3, the nozzle cap 100 may include a second accommodation space 101, a second outlet 102, and the like.

The second accommodating space 101 has a predetermined volume so that the protruding portion 70c of the second body 70b and the lower portion of the head 81 protruding outward of the first outlet 76 are accommodated therein . 4, the second accommodating space 101 may have a second connecting surface 103, a second guiding surface 104, and the like.

The second connection surface 103 may be formed on the inner circumferential surface of the second accommodation space 101 so as to be spaced apart from the first connection surface 78 of the second body 70b by a predetermined gap. The third connection passage 105 may be formed between the second connection surface 103 and the first connection surface 78 to connect the second connection passage 77 and the guide passage 106 to be described later . The third connection passage 105 can transfer the purge gas G delivered from the second connection passage 77 to the guide passage 106 to be described later.

The second guide surface 104 may be formed below the inner circumferential surface of the second accommodating space 101 so as to be spaced apart from the first guide surface 85 of the head 81 by a predetermined distance. For example, as shown in FIG. 4, the second guide surface 104 may have a conical shape such that the diameter progressively decreases toward the second outlet 102, like the first guide surface 85. 4, between the second guide surface 104 and the first guide surface 85, the electrolyte E discharged from the first discharge port 76 and the above-described third connection passage 105 The guide passage 106 can guide the fluid such as the purge gas G delivered from the second outlet 102 to the second outlet 102. The fluid such as the electrolyte E and the purge gas G flowing into the guide passage 106 can flow toward the second discharge port 102 along the guide passage 106. [

The second outlet 102 is formed at the lower end of the nozzle cap 100 so as to discharge the fluid such as the electrolytic solution E and the purge gas G introduced into the guide passage 106 to the outside. 4, it is preferable that the second outlet 102 has a shape corresponding to the injection port 2b formed in the pouch 2a of the secondary battery 2. The secondary battery 2 is preferably arranged so that the electrolyte E discharged from the second outlet 102 can be introduced into the pouch 2a through the injection port 2b.

The purge member 110 is provided so that the electrolyte E remaining in the guide passage 106 can be discharged through the second discharge port 102. The electrolyte solution E flowing into the guide flow path 106 is discharged to the inside of the guide path 106 by a pressure difference between the guide path 106 and the second discharge port 102 and a friction force acting between the inner circumferential surface of the guide path 106 and the electrolyte solution E. [ There is a possibility that a part of the air is not completely discharged from the second discharge port 102 but remains in the inside of the guide flow path 106. 5, the purge member 110 includes a bypass line 111, open /

close valves

112 and 113, a gas line 114, a gas pump 115, And the like.

The bypass line 111 is provided to connect the first chamber communication port 10d of the processing chamber 10 and the first nozzle communication port 73a of the first body 70a. The on-off valve 112 is provided on the bypass line 111 so as to open and close the first nozzle communicating opening 73a. The second outlet port 102 and the first nozzle communication port 73a are communicated with each other by the bypass line 111 when the first nozzle communication port 73a is opened by the opening and closing valve 112. [ The opening / closing valve 112 preferably opens the first nozzle communicating opening 73a in a state in which the first discharging opening 76 is closed by the head 81, but the present invention is not limited thereto. That is, the opening / closing valve 112 may open the first nozzle communication port 73a while the first outlet 76 is opened and the electrolyte E is being injected into the secondary battery 2. When the first nozzle communication hole 73a is opened by the opening and closing valve 112, the internal space 10a of the processing chamber 10 and the

connection flow paths

74 and 77 connected to the first

nozzle communication hole

73a , 105, the guide passage 106, the second discharge port 102, etc. have the same pressure. This eliminates the pressure difference between the guide passage 106 and the second outlet 102 so that the electrolyte solution E remaining in the guide passage 106 can be discharged smoothly through the second outlet 102.

The gas line 114 is provided to connect the purge gas supply source S3 and the second nozzle communication port 73b of the first body 70a. The kind of gas usable as the purge gas (G) is not particularly limited. For example, the purge gas (G) may be nitrogen, an inert gas, or the like. The on-off valve 113 is provided on the gas line 114 so as to be able to open and close the second nozzle communication port 73b. The gas pump 115 is installed on the gas line 114 so as to be capable of pumping the purge gas G supplied from the purge gas supply source S3. 5, when the second nozzle communication port 73b is opened using the opening / closing valve 113 while the first outlet 76 is closed, and the gas pump 115 is operated, The purge gas G supplied from the purge gas supply source S3 flows into the second nozzle communication port 73b. The purge gas G introduced into the second nozzle communication port 73b passes through the

connection flow channels

74, 77 and 105 and the guide flow channel 106 in sequence and then is discharged through the second discharge port 102 And the electrolytic solution E remaining in the guide passage 106 can be pushed by the purge gas G and discharged through the second outlet 102.

As described above, the purge member 110 removes the current electrolytic solution E by removing the pressure difference between the guide passage 106 and the second discharge port 102 and the method of removing the purge gas G from the guide passage 106. [ The residual electrolyte E can be removed through two purge methods such as a method in which the residual electrolyte E is removed by supplying the residual electrolyte solution E. These two purge schemes are not always used at the same time. That is, at least one of the above-described two purge methods may be selectively performed depending on the environmental conditions such as the amount of the remaining electrolyte (E) and the progress of the injection process.

Meanwhile, the secondary battery manufacturing apparatus 1 is described as injecting the electrolyte E into the secondary battery using the injection nozzle assembly 10, but the present invention is not limited thereto. That is, the secondary battery manufacturing apparatus 1 may include a general injection nozzle applied to a conventional secondary battery manufacturing apparatus instead of the injection nozzle assembly 10.

FIG. 6 is a flow chart for explaining a method of advancing an electrolyte injection process and an impregnation process using the apparatus for producing a secondary battery shown in FIG. 1. FIG. 7 is a flowchart for explaining the electrolyte impregnation process shown in FIG.

Hereinafter, with reference to the drawings, a description will be given of a method of advancing the electrolyte solution E injection and impregnation process using the secondary battery production apparatus 1. [

2, the secondary battery 2 for injecting the electrolyte E is connected to the secondary battery 2 (2) so that the injection port 2b and the second outlet 102 of the nozzle cap 100 are connected to each other, And the injection nozzle assembly 50 is installed (S 10).

Next, the electrolytic solution E supplied from the electrolytic solution supply source S2 is supplied to the secondary battery 2 so as to have a fluid pressure equal to or higher than the reference fluid pressure in a state where a predetermined first atmosphere is formed in the inner space 10a of the processing chamber 10, (S 20).

The first atmosphere is a vacuum atmosphere in the internal space 10 by selectively driving at least one of the vacuum unit 20, the pressure unit 30 and the vent unit 40 so that the electrolyte solution E can be smoothly injected, A pressurized atmosphere, an atmospheric pressure atmosphere, and the like are selectively formed.

The method of forming the first atmosphere is not particularly limited. For example, after injecting a part of the electrolyte solution E into the secondary battery 2 for a predetermined first injection time while forming a vacuum atmosphere in the internal space 10a, The pressurizing unit 30 and the vent unit 40 are driven so as to inject the remaining part of the electrolyte solution E into the secondary battery 2 for a predetermined second injection time while raising the internal pressure Can be controlled. That is, the controller forms a vacuum atmosphere in the internal space 10a by using the vacuum unit 20 in the early part of the injecting step (S20) of the electrolyte solution E, And the inner pressure of the inner space 10a is increased by using the pressure unit 30 and the atmospheric pressure unit 40 in the latter half.

When the vacuum atmosphere is formed in the inner space 10a, the residual air existing at the interface between the electrode, the separation membrane, and the separation membrane of the electrode assembly 2c is discharged from the secondary battery 2 by the internal pressure of the internal space 10a do. Therefore, by injecting a part of the electrolytic solution E into the secondary battery 2 while the vacuum atmosphere is formed in the internal space 10a, the electrolytic solution E can easily penetrate into the empty space of the electrode assembly 2c have.

When the internal pressure of the internal space 10a is increased, the residual air of the secondary battery 2 which has not been removed even by the vacuum atmosphere is compressed by the internal pressure of the internal space 10a, and the volume thereof is reduced. Therefore, by injecting the remaining part of the electrolyte solution E into the secondary battery 2 while raising the internal pressure of the internal space 10a, the electrolyte solution E can be more easily penetrated into the empty space of the electrode assembly 2c . The controller preferably increases the internal pressure of the internal space 10a gradually or stepwise so that the internal pressure of the internal space 10a becomes higher than the atmospheric pressure by a predetermined ratio. Then, the electrolytic solution E is pressed by the internal pressure of the internal space 10a, so that it can penetrate into the empty space of the electrode assembly 2c more easily.

When the electrolyte E is injected by a predetermined amount into the secondary battery 2, the electrolyte supply line 60 is closed using the open / close valve 62 of the electrolyte supply line 60, The supply of the electrolytic solution (E) is stopped. 5, the needle 80 is moved toward the first discharge port 76 by elastic pressure or the like of the elastic member 90 to close the first discharge port 76, so that the secondary battery 2 The injection step (S 20) of the electrolytic solution (E) is completed.

Thereafter, the first nozzle communication hole 73a and the second nozzle communication hole 73b are opened using the opening / closing

valves

112 and 113, and the gas pump 115 is operated (S30). The pressure difference between the guide passage 106 and the second outlet 102 is removed and the electrolyte E remaining in the guide passage 106 is pushed toward the second outlet 102 by the purge gas G, The electrolyte solution E remaining in the guide passage 106 is discharged through the second discharge port 102. The purging of the residual electrolytic solution E in the state where the internal space 10a is adjusted to the atmospheric pressure state by using the opening and closing valve 44 of the vent unit 40 But is not limited thereto.

Next, when the purging of the electrolytic solution E is completed, the electrolytic solution E injected into the secondary battery 2 is applied to the electrode 10 in the state where the predetermined second atmosphere is formed in the inner space 10a of the processing chamber 10, The assembly 2c is impregnated (S40).

The second atmosphere is a vacuum atmosphere in the internal space 10 by selectively driving at least one of the vacuum unit 20, the pressure unit 30 and the vent unit 40 so that the electrolyte solution E can be smoothly impregnated, A pressurized atmosphere, an atmospheric pressure atmosphere, and the like are formed.

The method of forming the second atmosphere is not particularly limited. For example, after the electrolyte solution E is impregnated into the electrode assembly 2c (S42) for a predetermined pressing time in a state where a pressurized atmosphere is formed in the inner space 10a, The vacuum unit 20, the pressurizing unit 30, the vent unit 40, and the like, so that the electrolyte solution E can be impregnated into the electrode assembly 2c during a predetermined depressurization time in a state where a vacuum atmosphere is formed Can be controlled.

The pressing time in step S42 is not particularly limited and may be determined depending on the volume of the electrode assembly 2c, the amount of the electrolyte E injected, and the like. The pressurizing pressure in step S42 is not particularly limited and may be set higher than the atmospheric pressure. When the electrolytic solution E is impregnated in the step S42, the electrolytic solution E is uniformly pressed from all directions without any direction due to the internal pressure of the internal space 10a. Therefore, the electrolyte solution E can be quickly and uniformly impregnated into the electrode assembly 2c without deviating from the direction.

The decompression time in step S44 is not particularly limited and may be determined depending on the volume of the electrode assembly 2c, the amount of the electrolyte solution E injected, and the like. The reduced pressure in step S44 is not particularly limited and may be set to be lower than atmospheric pressure.

As described above, the electrolyte E can be quickly impregnated into the electrode assembly 2c by impregnating the electrolyte E under a pressurized atmosphere. However, in the step S20 of injecting the electrolyte E, It is difficult to efficiently discharge residual air that has not been removed from the secondary battery 2 efficiently. Therefore, when the electrolytic solution E is impregnated only in a pressurized atmosphere, the electrolytic solution E is not impregnated into a part of the electrode assembly 2c from which residual air has not yet been removed, There is a risk of being impregnated nonuniformly on the surface 2c.

In the step S44, the electrode assembly 2c can be impregnated with the electrolyte solution E in a vacuum atmosphere. Therefore, the residual air remaining in the electrode assembly 2c through the vacuum atmosphere of the internal space 10a can be supplied to the secondary battery (Not shown). Therefore, the electrolyte solution E can be impregnated into the electrode assembly 2c more quickly and uniformly without interfering with the residual air.

Meanwhile, it is preferable that the above-described steps S42 and S44 are repeatedly performed a predetermined number of times in consideration of the degree of impregnation of the electrolytic solution (E) rather than one-time operation.

As shown in FIG. 7, after performing steps S42 and S44, it is determined whether the steps S42 and S44 have been repeatedly performed by a predetermined number of times (S46).

Step S46 is preferably performed by counting the steps S42 and S44 once. If it is determined in step S46 that the steps S42 and S44 have been performed by less than the reference number, steps S42 and S44 may be performed again. Also, if it is determined in step S46 that the steps S42 and S44 have been repeatedly performed by the reference number of times, the step of impregnating the electrolytic solution (S40) may be terminated.

It is preferable that the pressurization time in step S42 and the decompression time in step S44 are gradually decreased each time the steps S42 and S44 are re-executed in consideration of the degree of impregnation of the electrolyte, It is not.

On the other hand, in the electrolytic solution impregnation step (S40), the steps S42 and S44 are all performed, but the present invention is not limited thereto. For example, the electrolytic solution impregnation step (S40) may be performed by performing at least one of steps S42 and S44.

As described above, the injecting step (S 20) and the infiltration step (S 40) of the electrolyte solution E to the secondary battery manufacturing apparatus 1, the secondary battery 2, and the like can be performed together in the single processing chamber 10 do. Therefore, the secondary battery manufacturing apparatus 1 can reduce the time required for manufacturing the secondary battery 2, thereby improving the productivity.

The secondary battery manufacturing apparatus 1 is provided so as to selectively depressurize or pressurize the internal space 10a of the processing chamber 10 into which the electrolyte E is injected and impregnated into the secondary battery 2 . Therefore, the secondary battery manufacturing apparatus 1 can easily adjust the pressure in the inner space 10a of the processing chamber 10 according to the injection pattern of the electrolyte solution E and the impregnation pattern thereof, The injection performance and the impregnation performance can be improved.

The secondary battery manufacturing apparatus 1 is configured such that the needle 80 is elastically biased by the elastic member 90 so that only when the liquid pressure of the electrolyte E exceeds the reference hydraulic pressure, (76) can be selectively opened. Thereby, the secondary battery manufacturing apparatus 1 can prevent the liquid pressure of the electrolytic solution E from being disturbed by the internal pressure of the internal space 10a, thereby keeping the liquid pressure of the electrolytic solution E constant. Therefore, the secondary battery manufacturing apparatus 1 can uniformly inject the electrolyte solution E into the secondary battery 2 by a predetermined amount, so that the quality of the secondary battery 2 can be made uniform.

The secondary battery manufacturing apparatus 3 according to the second embodiment of the present invention is different from the secondary battery manufacturing apparatus 1 described above in that it includes the injection nozzle assembly 50 'instead of the injection nozzle assembly 50 described above And is the same as the above-described secondary battery manufacturing apparatus 1 in the remaining configuration. Hereinafter, the secondary battery manufacturing apparatus 3 will be described mainly with reference to the injection nozzle assembly 50 '.

In addition, injection nozzle assembly 50 'differs from injection nozzle assembly 50 described above in that the structure of purge member 110 described above is modified. Hereinafter, a configuration in which the injection nozzle assembly 50 'and the injection nozzle assembly 50 described above are equally included will be described using the same reference numerals as used in the description of the injection nozzle assembly 50 .

8, the purge member 110 may include a first open line 116, an open / close valve 117, etc. instead of the bypass line 111 and the open / close valve 112 described above . Correspondingly, the processing chamber 10 may not include the first chamber communication port 10d.

The first open line 116 is connected to the first nozzle communication port 73a so as to communicate the outside with the first nozzle communication port 73a of the first body 70a. The on-off valve 117 is installed on the first open line 116 so as to be able to open and close the first nozzle communicating opening 73a.

When the first nozzle communicating opening 73a and the fourth chamber communicating opening 10g are opened by the opening and closing

valves

44 and 117 respectively, the inner space 10a of the processing chamber 10, The internal flow passages of the injection nozzle assembly 50 'connected to the injection nozzle assembly 73a are at atmospheric pressure. The purge member 110 removes the pressure difference between the guide passage 106 and the second outlet 102 so that the electrolytic solution E introduced into the guide passage 106 flows through the second outlet 102 And can be prevented from remaining on the guide passage 106 without being discharged.

Since the atmospheric pressure atmosphere can be formed in the inner space 10a by the purge member 110 and the atmosphere 10a of the processing chamber 10 is formed by using the purge member 110, (E) may be injected into the secondary battery (2).

The injection nozzle assemblies 50 and 50 'described above are used to perform the injection process of injecting the electrolyte solution E into the secondary battery 2 during the manufacturing process of the secondary battery 2. However, the kind of product that can be manufactured using the injection nozzle assemblies 50 and 50 'is not limited to the secondary battery 2. That is, the injection nozzle assemblies 50 and 50 'may be used to perform an injection process for injecting the injection liquid supplied from an external source during the manufacturing process of various products that can be manufactured by processing a predetermined object to be processed. It is possible. When the injection nozzle assemblies 50 and 50 'are used for manufacturing other products other than the secondary battery 2, the injection liquid is supplied to the injection nozzle assemblies 50 and 50 ') To perform the injection process. The internal pressure of the internal space 10a of the processing chamber 10 can be adjusted to a vacuum atmosphere, a pressurized atmosphere, an atmospheric pressure atmosphere or the like depending on the type and properties of the object to be processed. Then, the injection nozzle assemblies 50 and 50 'prevent the liquid pressure of the injection liquid from being disturbed by the internal pressure of the internal space 10a of the processing chamber 10 so that the injection liquid is supplied to the object to be processed by a predetermined amount So that the quality of a product manufactured using such an object to be processed can be made uniform.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims

A nozzle body including a first accommodating space, an inlet for introducing the infusion liquid supplied from an external supply source into the first accommodation space, and a first outlet for discharging the infusion liquid from the first accommodation space;

A needle having a head provided so as to be capable of opening and closing the first outlet; And

And an elastic member for elastically biasing the needle so that the head is spaced apart from the first outlet so that the first outlet is opened when the fluid pressure of the infusion liquid flowing into the accommodation space is equal to or greater than a predetermined reference fluid pressure. Injection nozzle assembly.
The method according to claim 1,

The needle further includes a shaft connected to the head, at least a portion of which is inserted into the first accommodation space through a first outlet, and a flange connected to the shaft and received in the first accommodation space,

Wherein the elastic member comprises an elastic spring interposed between an inner surface of the first accommodation space and the flange.
The method according to claim 1,

The first outlet has a first contact surface provided on an inner peripheral surface to face the head,

Wherein the head has a second contact surface on an outer circumferential surface to contact the first contact surface to close the first discharge port.
The method of claim 3,

Wherein the first contact surface and the second contact surface each have a conical shape whose diameter progressively decreases toward the first accommodation space.
The method of claim 3,

Wherein the elastic member elastically biases the needle such that the second contact surface is spaced from the first contact surface to open the first outlet when the hydraulic pressure is equal to or higher than the reference hydraulic pressure.
3. The method of claim 2,

Wherein the shaft includes at least one guide groove formed in the outer peripheral surface so as to guide the injection liquid introduced into the first accommodation space to the first discharge port.
The method according to claim 1,

A nozzle cap including a second accommodating space in which at least a part of the head is accommodated to allow infusion liquid discharged from the first outlet to be introduced and a second outlet for discharging the infusion liquid introduced into the second accommodation space to the outside, The injection nozzle assembly further comprising:
8. The method of claim 7,

Wherein the head has a first guide surface provided on an outer circumferential surface so as to face the nozzle cap,

And the second accommodating space has a second guide surface provided on the inner circumferential surface so as to form a guide passage which is spaced apart from the first guide surface by a predetermined distance and guides the injection liquid discharged from the first discharge port to the second discharge port Characterized by an injection nozzle assembly.
9. The method of claim 8,

Wherein the first guide surface and the second guide surface each have a conical shape whose diameter progressively decreases toward the second discharge port.
8. The method of claim 7,

Wherein the nozzle body further comprises a nozzle communication hole communicating the outside with the second accommodation space,

Further comprising a purge member mounted on the nozzle communication hole and capable of discharging the injection liquid remaining in the second accommodation space through the second outlet.
11. The method of claim 10,

The purge member

And a gas pump capable of supplying a purge gas supplied from an external gas supply source to the nozzle communication port.
12. The method of claim 11,

Wherein the gas pump is operative to supply the purge gas when the first outlet is closed.
11. The method of claim 10,

The purge member

Further comprising an on-off valve capable of opening and closing the nozzle communication hole.
An injection nozzle assembly for injecting an electrolyte solution into a secondary battery accommodated in an inner space of a processing chamber,

A nozzle body having a first accommodating space, an inlet for introducing an electrolyte supplied from an external electrolyte supply source into the first accommodating space, and a first outlet for discharging the electrolyte from the first accommodating space;

At least a portion of which is accommodated in the first accommodating space through the first outlet; a head provided at one end of the shaft so as to open and close the first outlet; A needle provided on the flange; And

The needle is interposed between the inner surface of the first accommodating space and the flange so that the head is spaced from the first outlet so that the first outlet is opened when the liquid pressure of the electrolyte is equal to or higher than a predetermined reference fluid pressure, And an elastic spring for urging the injection nozzle.
15. The method of claim 14,

A second accommodating space in which at least a part of the head is accommodated so as to allow the electrolyte discharged from the first outlet to be introduced therein and a second outlet for injecting the electrolyte solution introduced into the second accommodating space into the secondary battery, Further comprising an injection nozzle assembly.
16. The method of claim 15,

Wherein the nozzle body further comprises a nozzle communication hole communicating the outside with the second accommodation space,

And a purge member mounted on the nozzle communication hole and capable of discharging the electrolyte remaining in the second accommodation space through the second outlet.
17. The method of claim 16,

The purge member may include a bypass line connecting the chamber communication port formed in one side wall of the processing chamber and the nozzle communication port so as to communicate with the internal space of the processing chamber and an on-off valve for opening and closing the bypass line Wherein the injection nozzle assembly comprises:
15. The method of claim 14,

Wherein the nozzle body is coupled with the processing chamber to close the opening of the processing chamber.