Electrolyte supply apparatus for secondary battery

Abstract

The present invention relates to an electrolyte supply apparatus for a secondary battery and, more specifically, to an electrolyte supply apparatus for a secondary battery, comprising: a upper hopper unit having a first accommodation space so that a supplied electrolyte can be temporarily stored, and having a flow path on the lower side thereof; a lower hopper unit having a second accommodation space for guiding, toward a secondary battery, the electrolyte transferred from the upper hopper unit; a needle unit for opening or closing the flow path while ascending and descending in a state of being accommodated in the first accommodation space; and a nozzle unit accommodated in the lower hopper unit, and fastened to the flow path so as to communicate therewith.

Description

Electrolyte supply device for secondary batteries

[0001] This application claims the benefit of priority to Korean Patent Application No. 2023-0129866, filed September 26, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to an electrolyte supply device for a secondary battery, and more specifically, to an electrolyte supply device for a secondary battery capable of reducing the deviation in the amount of electrolyte injected and further minimizing the inflow of foreign substances.

[0003]

[0004] As technological development and demand for mobile devices increase, rechargeable secondary batteries are increasingly being used as energy sources for a variety of mobile devices. Secondary batteries are also attracting attention as an energy source for electric and hybrid electric vehicles, offering an alternative to conventional gasoline and diesel vehicles that rely on fossil fuels.

[0005] Secondary batteries are classified into cylindrical and prismatic batteries, in which the electrode assembly is built into a cylindrical or prismatic metal can, and pouch-type batteries, in which the electrode assembly is built into a pouch-type case made of aluminum laminate sheet, depending on the shape of the battery case.

[0006] Meanwhile, when manufacturing a cylindrical battery, an electrolyte injection process is required in which the electrolyte is injected into the case in which the electrode assembly is built so that the electrode assembly is sufficiently submerged, and then left for a certain period of time so that the electrolyte can fill the microscopic pores inside the electrode assembly.

[0007] In this regard, Fig. 1 is a conceptual diagram of an electrolyte supply device according to the prior art, and Fig. 2 is an enlarged drawing of a portion of an electrolyte supply device according to the prior art.

[0008] As shown in Fig. 1, a conventional electrolyte supply device is disclosed, which includes a base nozzle member (10) having a plurality of nozzle members (11), a plunger member (20) for opening and closing a discharge port (11a), a plunger fixing plate member (30), an elevating and lowering means (40) for elevating or lowering the plunger fixing plate member (30), and a plate guide member (50) for guiding the operation of the elevating and lowering means (40).

[0009] In this conventional electrolyte supply device, the nozzle part (11) is provided with a supply chamber (12) for receiving the electrolyte, and a discharge port (11a) for discharging the electrolyte is formed at the bottom, so that the electrolyte in the supply chamber (12) is injected into the inside of the battery case (5).

[0010] Also, as shown in FIG. 2, the plunger member (20) is provided with an opening / closing portion (21) that is inserted into an opening / closing groove (11b) at the end to block the discharge port (11a), and an O-ring (21a) that is in close contact with the inner surface of the opening / closing groove (11b) is coupled to the opening / closing portion (21). Therefore, when the plunger member (20) is lowered and inserted into the opening / closing groove (11b), the O-ring (21a) is in close contact with the inner surface of the opening / closing groove (11b) and seals, thereby blocking the discharge port (11a) and sealing the inside of the supply chamber (12).

[0011] The electrolyte injection process is essential for manufacturing secondary batteries. This process must be repeated countless times, resulting in continuous friction that wears out the O-ring. In particular, O-rings can swell due to prolonged exposure to electrolyte, which increases the friction surface area and accelerates wear.

[0012] Ultimately, not only will the proper amount of electrolyte not be injected into the battery case due to wear of the O-ring, but foreign substances generated during the wear process will also enter the battery case along with the electrolyte, which will increase the failure rate and pose a significant threat to safety.

[0013] Meanwhile, the storage case member stores the electrolyte discharged through the discharge port (11a), but since the supply room (12) contains air mixed in the upper portion of the electrolyte as well as the electrolyte, the air also flows into the storage case member through the discharge port (11a).

[0014] At this time, the air introduced strikes the electrolyte stored in the storage case member, causing the electrolyte to scatter, and the scattered electrolyte may adhere to the inner wall of the storage case member or leak, causing the amount of liquid to be inconsistent.

[0015]

[0016] (Prior art literature)

[0017] (Patent Document 1) Korean Patent Publication No. 10-2009-0036793

[0018] (Patent Document 2) Korean Patent Publication No. 10-1876834

[0019]

[0020] In order to solve the above problems, the present invention aims to provide an electrolyte supply device for a secondary battery in which the electrolyte supply can proceed stably.

[0021] In addition, the present invention aims to provide an electrolyte supply device for a secondary battery that can minimize the inflow of foreign substances during the electrolyte supply process.

[0022]

[0023] In order to solve the above-described problems, the electrolyte supply device of the secondary battery according to the present invention is characterized by comprising: an upper hopper part (100) having a first receiving space (S1) formed therein to temporarily store the supplied electrolyte and a flow path (110) provided therein; a lower hopper part (200) having a second receiving space (S2) formed therein to guide the electrolyte transferred from the upper hopper part (100) to the secondary battery (B); a needle part (300) that opens or closes the flow path (110) while being raised or lowered while being stored in the first receiving space (S1); and a nozzle part (400) that is stored inside the lower hopper part (200) and is connected to be in communication with the flow path (110).

[0024] In addition, in the electrolyte supply device of the secondary battery of the present invention, the nozzle part (400) is characterized by having a hollow tube shape with open upper and lower parts and an empty interior.

[0025] In addition, in the electrolyte supply device of the secondary battery of the present invention, the lower opening of the nozzle part (400) is characterized in that it is located above the lower end of the lower hopper part (200).

[0026] In addition, in the electrolyte supply device of the secondary battery of the present invention, it is characterized in that one or more slits (410) are formed on the side of the nozzle portion (400).

[0027] In addition, in the electrolyte supply device of the secondary battery of the present invention, the one or more slits (410) are characterized by being formed in a spiral shape along the side of the nozzle portion (400).

[0028] In addition, in the electrolyte supply device of the secondary battery of the present invention, the needle part (300) includes a first body part (310) having an open top, an empty interior, and an electrolyte discharge hole (311) formed on the side, a second body part (320) positioned below the first body part (310), and a nip part (330) positioned below the second body part (320), and characterized in that the outer diameter becomes smaller in the order of the first body part (310), the second body part (320), and the nip part (330).

[0029] In addition, in the electrolyte supply device of the secondary battery of the present invention, the upper hopper portion (100) is provided with a first sealing member (130) having a second movement path (131) formed in the center so that the electrolyte can move, and when the needle portion (300) is lowered, the lower edge of the second body portion (320) is in close contact with the second movement path (131).

[0030] In addition, in the electrolyte supply device of the secondary battery of the present invention, a first protrusion (132) in a circular ring shape is provided on the upper surface of the first sealing member (130), and the first protrusion (132) is characterized in that it is located along the edge of the second moving path (131).

[0031] In addition, in the electrolyte supply device of the secondary battery of the present invention, the first sealing member (130) is characterized in that it is made of EPDM (Ethylene Propylene Rubber) material.

[0032] In addition, in the electrolyte supply device of the secondary battery of the present invention, a socket member (120) having a first movement path (121) provided in the center so that the electrolyte can move is positioned above the first sealing member (130), and the first movement path (121) is characterized by having a top-down narrowing structure in which the cross-sectional area becomes smaller as it goes down.

[0033] In addition, in the electrolyte supply device of the secondary battery of the present invention, a third movement path (141) is provided in the center of the lower portion of the first sealing member (130) so that the electrolyte can move, and a fastening member (140) for fixing one side of the nozzle part (400) is positioned.

[0034] In addition, in the electrolyte supply device of the secondary battery of the present invention, the fastening member (140) is characterized in that it is made of a metal material.

[0035] In addition, in the electrolyte supply device of the secondary battery of the present invention, it is characterized in that the third movement path (141) of the first sealing member (130) and the nozzle part (400) are connected so as to be in communication.

[0036] In addition, the electrolyte supply device of the secondary battery of the present invention further includes a pallet (500) including an upper pallet (510) and a lower pallet (520), wherein the lower hopper part (200) is stored in the upper pallet (510), and the secondary battery (B) is stored in the lower pallet (520).

[0037]

[0038] According to the electrolyte supply device of the secondary battery of the present invention, the upper hopper portion is provided with a first sealing member in the flow path, and since it is a structure that determines whether the electrolyte moves or not by the weight of the needle portion, there is an advantage in that the reduction in sealing force can be minimized even when used for a long period of time.

[0039] In addition, according to the electrolyte supply device of the secondary battery of the present invention, the upper hopper portion is provided with a first sealing member in the flow path, and since it is a structure that determines whether the electrolyte moves or not by the weight of the needle portion, it has excellent wear resistance, and this has the advantage of minimizing the occurrence of foreign substances.

[0040] In addition, according to the electrolyte supply device of the secondary battery of the present invention, since the sealing force of the needle portion and the second moving path is excellent, a fixed amount of electrolyte can be supplied to the secondary battery, which has the advantage of reducing the deviation in the amount of electrolyte injected.

[0041] In addition, according to the electrolyte supply device of the secondary battery of the present invention, a nozzle part capable of dispersing the direction of air inflow is provided inside the lower hopper part, so that scattering of the electrolyte supplied to the lower hopper part can be minimized, which has the advantage of contributing to supplying a fixed amount of electrolyte.

[0042]

[0043] Figure 1 is a conceptual diagram of an electrolyte supply device according to conventional technology.

[0044] Figure 2 is an enlarged view of a portion of an electrolyte supply device according to the prior art.

[0045] Figure 3 is a drawing of an electrolyte supply device of a secondary battery according to the present invention viewed from one side.

[0046] Figure 4 is a drawing of the electrolyte supply device shown in Figure 3 viewed from the other side, showing the state before the electrolyte is supplied to the secondary battery.

[0047] Figure 5 is a drawing of the electrolyte supply device shown in Figure 3 viewed from the other side, showing the state after the electrolyte has been supplied to the secondary battery.

[0048] Figure 6 is an exploded view for explaining the fastening structure of the upper hopper portion and the needle portion in the electrolyte supply device according to the present invention.

[0049] Figure 7 is an enlarged view for explaining the path along which the electrolyte from the upper hopper part moves to the lower hopper part in the electrolyte supply device according to the present invention.

[0050] Figure 8 is an enlarged cross-sectional view of the first sealing member constituting the electrolyte supply device according to the present invention.

[0051] Figure 9 is an enlarged perspective view of the first sealing member shown in Figure 8.

[0052] Figure 10 is an enlarged view for explaining the fastening structure of the lower hopper portion and the nozzle portion in the electrolyte supply device according to the present invention.

[0053] Fig. 11 is an enlarged perspective view of the nozzle section shown in Fig. 10.

[0054]

[0055] In this application, the terms “includes,” “has,” or “comprises” are intended to specify the presence of a feature, number, step, component, part, or combination thereof described in the specification, but should be understood not to preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0056] Additionally, the same drawing reference numerals are used for parts with similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless specifically stated otherwise, but rather implies the inclusion of additional components.

[0057]

[0058] Hereinafter, an electrolyte supply device for a secondary battery according to the present invention will be described with reference to the attached drawings.

[0059] FIG. 3 is a drawing of an electrolyte supply device of a secondary battery according to the present invention as viewed from one side, FIG. 4 is a drawing of the electrolyte supply device shown in FIG. 3 as viewed from the other side, showing a state before the electrolyte is supplied to the secondary battery, FIG. 5 is a drawing of the electrolyte supply device shown in FIG. 3 as viewed from the other side, showing a state after the electrolyte is supplied to the secondary battery, and FIG. 6 is an exploded view for explaining the fastening structure of the upper hopper portion and the needle portion in the electrolyte supply device according to the present invention.

[0060] As shown in Figures 3 to 6, the electrolyte supply device of the secondary battery according to the present invention is configured to include an upper hopper part (100), a lower hopper part (200), a needle part (300), a nozzle part (400), and a pallet (500).

[0061] First, the upper hopper section (100) is provided with a first receiving space (S1) having a certain volume for temporarily storing the supplied electrolyte, and a flow path (110) is provided on the lower side.

[0062] Although the drawing shows that there are three first receiving spaces (S1), this can be increased or decreased as desired.

[0063] The lower hopper section (200) has a second receiving space (S2) formed in a roughly cylindrical shape with an open top and bottom and an empty interior so that the electrolyte transferred from the upper hopper section (100) can be guided to the secondary battery (B).

[0064] Here, it is preferable that the number of second receiving spaces (S2) be formed in the same number so as to correspond to the first receiving spaces (S1) of the upper hopper section (100) described above.

[0065] Continuing, the needle part (300) is stored in the first receiving space (S1) and is configured to open or close the urea (110) and is operated to rise and fall within the first receiving space (S1).

[0066] In detail, the needle part (300) is configured to include a first body part (310), a second body part (320) positioned below the first body part (310), and a nip part (330) positioned below the second body part (320).

[0067] The first body part (310) is hollow inside with an open top to allow electrolyte to flow in, and one or more electrolyte discharge holes (311) are formed on the side. Of course, a liquid supply pipe (not shown) is connected to the open top of the first body part (310), so that electrolyte can be supplied to the first body part (310) from the outside.

[0068] The upper part of the second body part (320) is connected to the first body part (310) and the lower part is connected to the nip part (330). The lower part connected to the nip part (330) has a cone shape that becomes sharper as it goes down.

[0069] Meanwhile, it is preferable that the outer diameter becomes smaller in the order of the first body part (310), the second body part (320), and the nip part (330), to prevent the introduced electrolyte from flowing back.

[0070] Of course, it is preferable that the outer diameter of the first body part (310) be slightly smaller than the inner diameter of the first receiving space (S1) so that the needle part (300) can move up and down within the first receiving space (S1).

[0071] A nozzle section (400) having a certain length is housed inside the lower hopper section (200), and is connected to the flow path (110) to minimize scattering of the electrolyte transferred to the lower hopper section (200). A detailed description of this will be provided later.

[0072] A pallet (500) comprising an upper pallet (510) and a lower pallet (520) stores and fixes a lower hopper section (200) and a secondary battery (B).

[0073] In detail, the upper pallet (510) has a plate shape with a certain thickness and has the same number of holes as the lower hopper part (200) provided in the vertical direction so as to be able to accommodate and fix the lower hopper part (200).

[0074] The lower pallet (520) is located below the upper pallet (510) and has a plate shape with a certain thickness to store and fix the secondary battery (B), and the same number of storage grooves as the number of secondary batteries (B) to be stored are formed in the vertical direction.

[0075] Of course, the bottom of the storage groove of the lower pallet (520) is blocked to prevent the secondary battery (B) from falling down.

[0076] Here, the secondary battery (B) is a cylindrical secondary battery before the cap assembly is installed. Typically, a cylindrical secondary battery is obtained by placing a separator between a long sheet-shaped positive electrode and negative electrode, wrapping the jelly-roll-shaped electrode assembly in a battery case, and then injecting an electrolyte, and then installing and fixing the cap assembly.

[0077] In the secondary battery (B) of the present invention, the electrode assembly is housed in a battery case, the upper part of the battery case is open, and the electrode assembly corresponds to a known technical configuration, so a detailed description thereof will be omitted.

[0078] Although not shown in the drawing, a known lifting means (not shown) may be provided to enable the upper pallet (510) and the lower pallet (520) to move up and down, respectively, or simultaneously.

[0079] When supplying electrolyte to the secondary battery (B), it is performed under reduced pressure conditions. At this time, the lower part of the lower hopper part (200) is in close contact with the open end of the secondary battery (B), while the upper part of the lower hopper part (200) is connected to the flow path (110) of the upper hopper part (100).

[0080] Accordingly, the electrolyte in the upper hopper section (100) moves downwards through the flow path (110) and the nozzle section (400), and as a result, the electrolyte flows into the secondary battery (B) through the lower hopper section (200).

[0081] FIG. 7 is an enlarged view for explaining the path through which the electrolyte from the upper hopper part moves to the lower hopper part in the electrolyte supply device according to the present invention, FIG. 8 is an enlarged cross-sectional view of the first sealing member constituting the electrolyte supply device according to the present invention, and FIG. 9 is an enlarged perspective view of the first sealing member illustrated in FIG. 8.

[0082] As described above, the electrolyte moves downward through the flow path (110). To ensure that the supply and blocking of the electrolyte is ensured, it is preferable that a socket member (120), a first sealing member (130), and a fastening member (140) are provided in the flow path (110).

[0083] First, the socket member (120) has a first movement path (121) provided in the center so that the electrolyte can move. At this time, it is preferable that the first movement path (121) has a top-bottom narrow structure in which the cross-sectional area becomes smaller as it goes down so that the electrolyte can be collected well.

[0084] The first sealing member (130) is located below the socket member (120) and comes into close contact with the lower side, more specifically, the lower edge, of the second body part (320) when the needle part (300) descends.

[0085] In other words, the first sealing member (130) is configured to increase the adhesion with the second body part (320) and to ensure the movement of the electrolyte, and is a roughly cylindrical shape with a second passage (131) provided in the center to allow the electrolyte to pass through.

[0086] In addition, it is preferable that one or more protrusions be formed on the upper and lower surfaces of the first sealing member (130). For example, a first protrusion (132) in the shape of a circular ring may be provided on the upper surface of the first sealing member (130), more specifically, along the upper edge of the second moving path (131). Through this first protrusion (132), the adhesion with the second body part (320) can be increased.

[0087] In addition, when a second protrusion (133) in the shape of a circular ring is provided on the upper surface of the first sealing member (130), more specifically, at a position spaced apart from the upper edge of the second moving path (131), the adhesion with the socket member (120) can be improved. In this case, it is preferable that a groove capable of accommodating the second protrusion (133) be provided on the bottom surface of the socket member (120).

[0088] Also, when the first sealing member (130), more specifically, a third protrusion (134) in the shape of a circular ring is provided at a position spaced apart from the lower edge of the second moving path (131) at a certain distance, the adhesion with the upper hopper part (100) body can be increased, and at this time, it is preferable that a groove part in which the third protrusion (134) is received is formed in the upper hopper part (100) body.

[0089] In addition, it is preferable that a fourth protrusion (135) in the shape of a circular ring be provided along the lower edge of the second passage (131) of the first sealing member (130) to prevent the electrolyte from penetrating between the contact surfaces of the first sealing member (130) and the fastening member (140) and to minimize the electrolyte from flowing backward.

[0090] Here, the first sealing member (130) is preferably a material that has a certain elasticity and does not react with the electrolyte, and may be, for example, an EPDM (Ethylene Propylene Rubber) material, but is not limited thereto as long as it can achieve the same function and purpose.

[0091] A fastening member (140) for fixing one side of the nozzle part (400), more specifically the upper part of the nozzle part (400), is located below the first sealing member (130), and a third passage (141) is provided in the center to allow the electrolyte to pass through.

[0092] At this time, it is preferable that the fourth protrusion (135) of the first sealing member (130) mentioned above protrude slightly toward the inside of the third movement path (141) of the fastening member (140).

[0093] In addition, a portion of the lower side of the fastening member (140) is exposed below the upper hopper part (100), and a nozzle (400) is fastened to the inner surface of the fastening member (140).

[0094] For example, the fastening member (140) may be a nut type with threads formed on both the outer and inner surfaces, and the upper part of the nozzle part (400) may be fastened to the inner surface using a male-female screw method, and the threads on the outer surface may be fixed to the upper hopper part (100).

[0095] The material of the fastening member (140) is not particularly limited, but may be metal, preferably stainless steel.

[0096] As described above, the electrolyte flows through the first movement path (121) of the socket member (120), the second movement path (131) of the first sealing member (130), and the third movement path (141) of the fastening member (140) before flowing into the nozzle member (400).

[0097] Of course, it is obvious that depending on the overlapping area of ​​the nozzle part (400) and the fastening member (140), it may flow directly into the nozzle part (400) after the second movement path (131) of the first sealing member (130) without passing through the third movement path (141).

[0098] Drawing symbol 210 is a second sealing member, which is configured to prevent electrolyte from leaking by closely contacting the upper hopper part (100) and the lower hopper part (200).

[0099] In the past, in order to prevent leakage of electrolyte, an O-ring was attached to the second body part or nip part of the needle part or an O-ring was installed in the flow path, which frequently caused excessive friction, which led to wear of the O-ring and, consequently, a problem of reduced sealing force occurred.

[0100] However, in the present invention, since the first sealing member (130) is mounted on the euro and has a structure that blocks the passage through which the electrolyte moves by the weight of the needle portion (300), it is possible to minimize the decrease in sealing force even when used for a long period of time.

[0101] In addition, excessive friction between the first sealing member (130) and the second body part of the needle part can be prevented, thereby minimizing the generation of foreign substances.

[0102] FIG. 10 is an enlarged view for explaining the fastening structure of the lower hopper portion and the nozzle portion in the electrolyte supply device according to the present invention, and FIG. 11 is an enlarged perspective view of the nozzle portion shown in FIG. 10.

[0103] The electrolyte supplied to each secondary battery (B) stored in the lower pallet must always be supplied in a certain amount. However, if the supplied electrolyte flies and gets on the inner wall of the lower hopper section (200) or leaks to the outside, a deviation in the supplied amount may occur, which may lead to a defect.

[0104] For example, in addition to a certain amount of electrolyte, air is also mixed in the upper portion of the electrolyte in the upper portion of the first receiving space. However, since the supply process is carried out under reduced pressure conditions, air is continuously sucked in as the electrolyte filled in the first receiving space moves to the lower hopper portion (200).

[0105] Since this air strikes the electrolyte in the lower hopper section (200), the electrolyte flies and adheres to the inner wall of the lower hopper section (200). Therefore, the electrolyte that should be injected into the secondary battery (B) may be insufficient, or conversely, the amount of electrolyte injected into a certain secondary battery (B) may increase due to the electrolyte that adhered to the inner wall.

[0106] The nozzle section (400) housed inside the lower hopper section (200) is configured to prevent scattering of the electrolyte by minimizing the aforementioned phenomenon, i.e., air striking the electrolyte.

[0107] In detail, it is preferable that the nozzle part (400) be a hollow tube shape with the upper and lower parts open and the interior empty, and it is more preferable that one or more slits (410) are provided on the side, and it is most preferable that one or more slits (410) are formed in a spiral shape along the side of the nozzle part (400).

[0108] When a nozzle part (400) having the above configuration is provided together with the lower hopper part (200), the air sucked in after the electrolyte is transferred is dispersed through the lower opening of the nozzle part (400) and the slit (410) on the side, so that the electrolyte can be minimized from flying away.

[0109] Additionally, it is preferable that the lower opening of the nozzle part (400) be located above the lower end of the lower hopper part (200).

[0110]

[0111] As described above, specific parts of the present invention have been described in detail. To those skilled in the art, such specific descriptions are merely preferred embodiments, and the scope of the present invention is not limited thereby. It is obvious to those skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

[0112] (Explanation of symbols)

[0113] 100: Upper hopper section

[0114] 110: Euro

[0115] 120: Socket member 121: First moving path

[0116] 130: First sealing member

[0117] 131: 2nd moving route 132: 1st protrusion

[0118] 133: Second protrusion 134: Third protrusion

[0119] 135: 4th protrusion

[0120] 140: Fastening member 141: Third moving path

[0121] 200: Lower hopper section

[0122] 210: Second sealing member

[0123] 300: Needle

[0124] 310: First body part 311: Electrolyte discharge hole

[0125] 320: Second body part

[0126] 330: Nibbu

[0127] 400: Nozzle section

[0128] 410: Slit

[0129] 500: Pallet

[0130] 510: Upper pallet

[0131] 520: Lower Pallet

[0132] S1: First receiving space

[0133] S2: Second reception space

[0134] B: Secondary battery

Claims

1. An upper hopper section having a first storage space formed to temporarily store the supplied electrolyte and a flow path provided at the bottom; A lower hopper section having a second receiving space formed therein for guiding the electrolyte transferred from the upper hopper section to the secondary battery; A needle part that opens or closes the urea while being raised and lowered in a state of being stored in the first receiving space; and An electrolyte supply device for a secondary battery, characterized in that it comprises a nozzle part that is stored inside the lower hopper part and connected to the euro.

2. In paragraph 1, An electrolyte supply device for a secondary battery, characterized in that the nozzle part is a hollow tube shape with open upper and lower parts and an empty interior.

3. In paragraph 2, An electrolyte supply device for a secondary battery, characterized in that the lower opening of the nozzle portion is located above the lower end of the lower hopper portion.

4. In paragraph 2, An electrolyte supply device for a secondary battery, characterized in that one or more slits are formed on the side of the nozzle section.

5. In paragraph 4, An electrolyte supply device for a secondary battery, characterized in that the one or more slits are formed in a spiral shape along the side of the nozzle portion.

6. In paragraph 2, An electrolyte supply device for a secondary battery, characterized in that the needle portion comprises a first body portion having an open upper portion, an empty interior, and an electrolyte discharge hole formed on a side thereof, a second body portion positioned below the first body portion, and a nip portion positioned below the second body portion, wherein the outer diameter becomes smaller in the order of the first body portion, the second body portion, and the nip portion.

7. In paragraph 6, The upper hopper section is provided with a first sealing member having a second passage formed in the center to allow the electrolyte to move. An electrolyte supply device for a secondary battery, characterized in that when the needle part is lowered, the lower edge of the second body part is in close contact with the second moving path.

8. In paragraph 7, An electrolyte supply device for a secondary battery, characterized in that a first protrusion in the shape of a circular ring is provided on the upper surface of the first sealing member, and the first protrusion is located along the edge of the second moving path.

9. In paragraph 8, An electrolyte supply device for a secondary battery, characterized in that the first sealing member is made of EPDM (Ethylene Propylene Rubber) material.

10. In paragraph 7, An electrolyte supply device for a secondary battery, characterized in that a socket member having a first passage provided in the center so that the electrolyte can move is positioned on the upper portion of the first sealing member, and the first passage has a top-to-bottom narrow structure in which the cross-sectional area becomes smaller as it goes down.

11. In paragraph 7, An electrolyte supply device for a secondary battery, characterized in that a third movement path is provided in the center of the lower portion of the first sealing member so that the electrolyte can move, and a fastening member is positioned to fix one side of the nozzle portion.

12. In paragraph 11, An electrolyte supply device for a secondary battery, characterized in that the above fastening member is made of a metal material.

13. In paragraph 11, An electrolyte supply device for a secondary battery, characterized in that the third moving path of the first sealing member and the nozzle part are connected so as to be in communication.

14. In paragraph 1, An electrolyte supply device for a secondary battery, characterized in that it further includes a pallet including an upper pallet and a lower pallet, wherein the lower hopper part is stored in the upper pallet, and the secondary battery is stored in the lower pallet.

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