Battery vent cap

Abstract

The present invention for a battery vent cap comprises a body (100) having a cylindrical structure with a hollow portion formed inside, and a cap (200) inserted into and coupled to the body (100); wherein the cap (200) has a cylindrical shape having a hollow portion (212) formed inside and an upper surface (211) formed at the top, and the hollow portion (212) is a cylinder shape in which a rubber (300) is coupled to a body (210) connected to the inside of the battery, and includes a vent portion (220) provided on the upper surface (211) of the body (210); the vent portion (220) is composed of an exhaust hole (224) provided penetrating the side of the vent portion (220) and a through hole (225) connected to the hollow portion (212) of the body (210) penetrating the upper surface of the vent portion (220) where the exhaust hole (224) is formed, and the upper outer side of the vent portion (220). The main point is that a cut surface (221) is provided on the circumferential surface, and an inclined surface (222) is provided in a shape that spreads downward on the inside of the exhaust hole (224).

Description

Technology Field

[0001] The present invention relates to a vent cap for a battery, and more specifically, to a vent cap for a battery that minimizes the tension of the rubber fastened to the cap for discharging gas inside the battery, thereby facilitating gas discharge even at low pressure inside the battery. Background Technology

[0002] Generally, batteries used in automobiles and the like charge and discharge through oxidation and reduction reactions, and oxygen and hydrogen gases are generated when the battery is charged or discharged. Additionally, if the battery is overcharged, gas is generated. If these gases accumulate inside the battery, the pressure rises, and since the battery poses a fire risk due to the high pressure, a structure is known that allows the battery to maintain a constant internal pressure by releasing the gas to the outside when the internal pressure reaches a set pressure.

[0003] FIG. 1 is an exploded view of a conventional safety valve, FIG. 2 is a combined cross-sectional view of the safety valve of FIG. 1, and FIG. 3 is an operating state view of the safety valve of FIG. 1.

[0004] As described above, in normal operation, the safety valve (1) has a cap membrane (20) covering the upper part of the sub-body (12), and the protrusion (21) of the cap membrane (20) is in line contact with the outer surface of the sub-body (12), so even if gas is introduced through the inlet hole (40), the gas is not discharged to the outside until a predetermined pressure is reached.

[0005] A configuration is known in which, when the pressure of the gas introduced through the inlet hole (40) exceeds a predetermined pressure, the cap membrane (20) is lifted upward by the pressure of the gas and the legs of the cap membrane (20) spread outward, thereby separating the contact between the protrusion (21) of the cap membrane (20) and the outer surface of the sub-body (12), and the gas introduced through the inlet hole (40) is discharged to the outside through the through hole (13) of the sub-body (12), the upper part of the sub-body (12), the outer surface of the sub-body (12), and the discharge hole (11), so that the battery connected to the safety valve (1) maintains a constant pressure.

[0006] However, the above safety valve had a problem in that gas could not be discharged in conjunction with the low pressure inside the battery.

[0007] FIG. 4 is an exploded view of another conventional battery vent cap, and FIG. 5 is a combined cross-sectional view showing the operating state of FIG. 4.

[0008] As described, the valve (300) coupled to the insert (200) connected to the battery is shaped like a bird's beak, consisting of a nozzle (320) extending from the top of the body, and the valve (300) is made of an elastic material, and a slot (322) is provided at the top of the nozzle (320), so that it is normally closed by the elastic force of the nozzle (320), and when the internal pressure of the battery rises, the nozzle (320) elastically deforms to open the slot (322).

[0009] That is, a configuration is known in which the slot (322) is closed by the elastic force of the nozzle (320) to prevent gas from being discharged, and opens when the nozzle (320) undergoes elastic deformation due to an increase in pressure inside the battery to discharge gas to the outside.

[0010] However, the above vent cap controls the gas discharge by equipping a valve with a slot, but there was a problem in that the valve was adsorbed under certain conditions and could not produce the desired discharge performance. Prior art literature

[0011] Korean Patent Publication No. 10-2502996 (Published Feb. 23, 2023) Korean Patent Publication No. 10-1268294 (Published May 28, 2013) The problem to be solved

[0012] The present invention aims to solve the above-mentioned problems by providing a battery vent cap that minimizes the tension of the rubber fastened to the cap for discharging gas inside the battery, thereby facilitating gas discharge even under low pressure inside the battery. means of solving the problem

[0013] The battery vent cap of the present invention comprises a body having a cylindrical structure with a hollow portion formed inside, and a cap inserted into and coupled to the body; wherein the cap has a cylindrical shape with a hollow portion formed inside and an upper surface formed at the top, and the hollow portion is coupled to a body connected to the inside of the battery and a rubber, and is cylindrical in shape and includes a vent portion provided on the upper surface of the body, wherein the vent portion is composed of an exhaust hole provided penetrating the side of the vent portion and a through hole penetrating the upper surface of the vent portion where the exhaust hole is formed and connected to the hollow portion of the body, and is characterized by having a cut surface provided on the outer circumference of the upper part of the vent portion and an inclined surface provided in a shape that opens downward on the inside of the exhaust hole.

[0014] In addition, the rubber is made of a material having elasticity, and a friction surface is provided on the lower side of the inclined surface, and when two inclined surfaces are formed, the inclined surfaces are characterized by having a 'V' shape that is spread downward.

[0015] In addition, the lower portion of the rubber is provided with a support portion that widens in the circumferential direction to seat the rubber on the upper surface of the body, and a rib provided protruding downward from the inner upper surface of the body is coupled in a state of pressing the upper surface of the support portion of the rubber, and a stopper provided in the inner direction of the rib contacts the upper surface of the vent portion when the cap is coupled to the inside of the body, thereby ensuring that the body and the cap are coupled in the correct position.

[0016] In addition, the rib is cylindrical in shape and is characterized by having an internal inclined portion that expands outwardly at the lower end of the through hole. Effects of the invention

[0017] The present invention has the effect of facilitating gas discharge even under low pressure inside the battery.

[0018] In addition, adding a slanted surface to the top of the cap minimizes friction between the rubber and the cap, and eliminates the problem of gas leakage caused by rubber adsorption.

[0019] In addition, since no friction is generated throughout the entire section during the assembly of the cap and rubber, the insertion force in the entry section is minimized, while the lower section generates friction throughout, effectively preventing the rubber from coming off. Brief explanation of the drawing

[0020] FIG. 1 is an exploded view of a conventional safety valve. FIG. 2 is a cross-sectional view of the safety valve of FIG. 1. Figure 3 is an operating state diagram of the safety valve in Figure 1. FIG. 4 is an exploded view of another conventional battery vent cap. FIG. 5 is a combined cross-sectional view showing the operating state of FIG. 4. FIG. 6 is an exploded perspective view of the vent cap of the present invention. FIG. 7 is a partial cross-sectional view showing the combined state of the body and the cap. FIG. 8 is a partial enlarged perspective view of the cap FIG. 9 is a cross-sectional view of the operating state with rubber attached to the vent part. FIG. 10 is a partially enlarged plan view of the cap Specific details for implementing the invention

[0021] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, the size, line thickness, etc., of the components illustrated in the drawings referenced for describing the present invention may be depicted somewhat exaggerated for ease of understanding.

[0022] Furthermore, the terms used in the description of the present invention are defined considering their functions within the invention and may vary depending on the user's or operator's intent, convention, etc. Accordingly, it is appropriate to define these terms based on the entire content of this specification.

[0023] Furthermore, in this application, terms such as 'comprising' and 'having' refer to the existence of specific numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0024] In addition, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms, and the embodiments provided are merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention.

[0025] Therefore, the present invention is susceptible to various modifications and may take various forms, and embodiments (aspects or examples) are to be described in detail in the specification. However, this is not intended to limit the present invention to specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the technical scope of the present invention, and singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise.

[0026] However, in describing the present invention, specific descriptions of well-known or known functions or configurations are omitted in order to clarify the gist of the invention.

[0027] Specific embodiments of the present invention will be described below with reference to the drawings.

[0028] FIG. 6 is an exploded perspective view of the vent cap of the present invention, FIG. 7 is a partial cross-sectional view showing the combined state of the body and the cap, FIG. 8 is a partial enlarged perspective view of the cap, FIG. 9 is a cross-sectional view of the operating state with the rubber attached to the vent part, and FIG. 10 is a partial enlarged plan view of the cap.

[0029] As described above, the vent cap for the battery of the present invention is broadly divided into a cap (200) that is inserted into and coupled to a body (100) and a rubber (300) that is coupled to the cap (200), and it goes without saying that such a vent cap is connected to the battery.

[0030] The body (100) has a cylindrical structure with a hollow portion formed inside and includes a rib (110) and a stopper (120) protruding downward from the upper inner surface, and the operation relationship thereof will be described later.

[0031] The cap (200) includes a body (210) and a vent portion (220), the body (210) has a cylindrical shape in which a hollow portion (212) is formed inside and an upper surface (211) is formed at the top, and the hollow portion (212) is connected to the inside of the battery.

[0032] The vent portion (220) is cylindrical in shape and is provided in the center of the upper surface (211) of the body (210), and includes a cut surface (221), an inclined surface (222), a friction surface (223), an exhaust hole (224), a through hole (225), and an internal inclined portion (226), and a cylindrical rubber (300) having elasticity is attached to the outer surface.

[0033] The above exhaust port (224) is provided by penetrating the side of the vent portion (220) and functions as a passage for discharging gas exhausted from the battery.

[0034] The above-mentioned through hole (225) penetrates the center of the upper surface of the vent portion (220) in which the exhaust hole (224) is formed and is connected to the hollow portion (212) of the body (210), and functions as a passage for discharging gas generated from the battery.

[0035] That is, the gas inside the battery is discharged through the exhaust port (224) via the hollow portion (212) and the through hole (225).

[0036] The above-mentioned internal slope portion (226) is provided in a shape that expands outwardly at the lower end of the through hole (225), thereby guiding the gas discharged through the hollow portion (212) of the body (210) into the through hole (225), and thus has the function and effect of preventing the gas from colliding at a right angle with the lower end of the through hole (225) and reducing the efficiency of exhaust.

[0037] The above-mentioned cut surface (221) is provided in a shape that cuts the outer circumferential surface of the upper part of the cylindrical vent portion (220), and has the function of reducing friction and tension with the rubber (300) elastically coupled to the vent portion (200).

[0038] That is, the rubber (300) attached to the outer upper part of the vent (200) has reduced tension due to the cut surface (221), so even when the pressure of the gas discharged through the exhaust hole (224) is low, it can open outward, thereby having the function and effect of allowing the gas to be easily discharged to the outside.

[0039] In addition, when the rubber (300) is attached to the vent portion (200), the frictional force is reduced by the cut surface (221), so it also has the effect of improving the ease of attachment.

[0040] The above-mentioned cut surface (221) may be provided as a single one on the outer circumference of the upper part of the cylindrical vent portion (220) so as to be linked to the elastic force of the rubber (300) and the gas pressure generated inside the battery, and if necessary, one may be added on the opposite side from the cut surface (221) to form a total of two.

[0041] The above-mentioned inclined surface (222) is positioned inside the exhaust hole (224) and is provided in a shape that spreads downward. When the rubber (300) is combined with the vent portion (220), in addition to having the function and effect of the previously described cut surface (221), when two inclined surfaces (222) are formed, the inclined surface (222) has a 'V' shape that spreads downward, so it has the function and effect of preventing a decrease in the efficiency of discharge caused by the generation of a vortex when gas is discharged.

[0042] The friction surface (223) is provided on the lower side of the cut surface (221) and forms a surface identical to the circumferential surface of the cylindrical vent portion (220), so that when the rubber (300) is coupled to the vent portion (220), it has the effect of increasing the fixing force of the rubber (300) by improving the friction force.

[0043] The rubber (300) is made of a material having elasticity such as rubber and has a cylindrical shape, so that it is combined with the vent portion (220) in a state where elasticity is imparted, and the lower portion of the rubber (300) is provided with a support portion (310) that widens in the circumferential direction, thereby improving the seating efficiency of the rubber (300) on the upper surface (211) of the body (210).

[0044] A cylindrical rib (110) protruding downward from the inner upper surface of the body (100) is coupled in a state that presses against the upper surface of the support portion (310) of the rubber (300), thereby improving the fixing force of the rubber (300) and preventing the rubber (300) from being detached by external force.

[0045] A stopper (120) provided in a cylindrical shape on the inner side of the rib (110) has the function of improving positional alignment so that the body (100) and the cap (200) are connected in the correct position by contacting the upper surface of the vent portion (220) when the cap (200) is connected to the inner side of the body (100).

[0046] When examining the operational relationship of such a configuration, a pressure greater than the set pressure is formed inside the battery, and even if the pressure is low pressure, the gas is discharged through the hollow part (212), through hole (225), and exhaust hole (224) of the cap (200), thereby elastically deforming the upper surface of the rubber (300) with low tension to spread outward, so that the gas can be discharged.

[0047] The present invention, as described above, combines the effects of facilitating gas discharge even under low pressure inside the battery, minimizing friction between the rubber and the cap by adding a cut surface to the upper part of the cap and eliminating the problem of gas non-discharge due to rubber adsorption, and minimizing insertion force in the entry section by ensuring that no friction force is generated throughout the entire section during assembly of the cap and rubber, while generating friction force throughout the lower section to prevent the rubber from detaching. Explanation of the symbols

[0049] 100:Body 110:Rib 120: Stopper 200: Cap 210: Body 211: Top surface 212: Central Department 220: Vent Department 221: Cut surface 222: Sloping surface 223:Friction surface 224:Exhaust hole 225: Penetration hole 226: Internal slope 300: Rubber 310: Support

Claims

Claim 1 The invention comprises a body (100) having a cylindrical structure with a hollow portion formed inside, and a cap (200) inserted into and coupled to the body (100): the cap (200) has a cylindrical shape in which a hollow portion (212) is formed inside and an upper portion has an upper surface (211) formed thereon, and the hollow portion (212) is a cylinder shape in which a body (210) connected to the inside of a battery and a rubber (300) are coupled, and includes a vent portion (220) provided on one side of the body (210), wherein the vent portion (220) is composed of an exhaust hole (224) provided penetrating the side of the vent portion (220) and a through hole (225) penetrating the vent portion (220) in which the exhaust hole (224) is formed and connected to the hollow portion (212) of the body (210), wherein the lower portion of the rubber (300) widens in the circumferential direction. A battery vent cap characterized by having a support portion (310), an upper surface (211) on the upper side of the body (210), and a rubber (300) placed on the upper surface of the body (210). Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 A battery vent cap according to claim 1, characterized in that the rib (110) provided protruding downward from the inner upper surface of the body (100) is coupled in a state of pressing the upper surface of the support portion (310) of the rubber (300). Claim 9 A battery vent cap according to claim 8, wherein the stopper (120) provided in the inner direction of the rib (110) contacts the upper surface of the vent portion (220) when the cap (200) is coupled to the inner side of the body (100), thereby allowing the body (100) and the cap (200) to be coupled in the correct position. Claim 10 delete

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