Anti-explosion liquid injection plug

Abstract

The utility model discloses an anti-explosion liquid injection plug which is provided with a porous vent plug and a vent hole, so that when air pressure is generated in a battery, the vent plug can quickly and effectively discharge hydrogen, reduce the internal pressure of the battery and improve the safety and the stability of the battery; by arranging the filter piece, dust particles can be effectively blocked, meanwhile, gas such as hydrogen is allowed to pass through, and harmful substances are prevented from being discharged; through the design that the metal net is additionally arranged below the filter piece, when the battery swells and possibly generates sparks due to overlarge air pressure, the sparks can be prevented from being further diffused in time, the risk of battery explosion is reduced, and the explosion-proof performance of the battery is enhanced. And the sealing ring and the groove structure are arranged on the outer ring, so that good sealing between the liquid injection plug and the battery is ensured, and the overall sealing performance of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to an explosion-proof liquid filling plug. Background Art

[0002] During the manufacturing and use of existing batteries, particularly energy storage devices like lithium-ion batteries, gases such as hydrogen may be generated within the battery as the charge and discharge cycles proceed. The accumulation of these gases not only affects the battery's performance and lifespan but can also pose a threat to battery safety, such as causing increased internal pressure and even leading to bulging, rupture, or explosion. Therefore, effectively managing and discharging the gases generated within the battery while preventing the ingress of foreign matter has become a pressing issue in battery design and manufacturing.

[0003] Traditional battery filler plug designs often focus solely on liquid injection and sealing, while neglecting the importance of gas discharge and filtration. This results in a lack of effective discharge channels when internal gas pressure builds up during battery use, increasing battery safety risks. Furthermore, foreign matter such as dust and moisture from the external environment can enter the battery through imperfect sealing structures, further impacting battery performance and lifespan. Utility Model Content

[0004] The purpose of the utility model is to provide an explosion-proof liquid injection plug that solves the above problems.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An explosion-proof liquid injection plug, which includes a liquid injection plug shell, characterized in that: the liquid injection plug shell includes an inner ring and an outer ring, the inner ring is provided with a liquid injection hole, a breathable plug is provided above the liquid injection hole, the breathable plug is sleeved on the inner ring, and the outer wall of the outer ring is provided with a sealing ring for sealing; a liquid injection plug cover is provided on the top of the liquid injection plug shell, the liquid injection plug cover is sleeved on the liquid injection plug shell and connected to the liquid injection plug shell, an exhaust hole is provided on the liquid injection plug cover, and a filter is provided between the liquid injection plug cover and the liquid injection plug shell.

[0007] Preferably, the vent plug is a porous structure made of rubber material.

[0008] Preferably, the outer wall of the outer ring is provided with a groove for accommodating the sealing ring.

[0009] Preferably, the liquid filling plug cover is threadedly connected to the outer edge of the liquid filling plug housing.

[0010] Preferably, a protrusion is provided on one side of the liquid injection plug cover close to the filter plate.

[0011] Preferably, a metal mesh is provided between the filter plate and the liquid injection plug cover.

[0012] The beneficial effects of the present invention are as follows: by providing a porous vent plug and vent holes, when air pressure is generated inside the battery, the vent plug can quickly and effectively discharge hydrogen, thereby reducing the internal pressure of the battery and improving the safety and stability of the battery; by providing a filter, it can effectively block dust particles while allowing hydrogen and other gases to pass through, preventing the discharge of harmful substances; by adding a metal mesh design below the filter, when the battery bulges due to excessive air pressure and may produce sparks, it can promptly prevent the further spread of sparks, thereby reducing the risk of battery explosion and enhancing the explosion-proof performance of the battery. The sealing ring and groove structure provided on the outer ring ensure a good seal between the filling plug and the battery, improving the overall sealing performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Among them, the liquid injection plug shell 1, inner ring 2, outer ring 3, liquid injection hole 4, vent plug 5, sealing ring 6, groove 7, liquid injection plug cover 8, exhaust hole 9, filter plate 10, and protrusion 11. DETAILED DESCRIPTION

[0015] The technical solution of the present utility model will be further described in detail below in conjunction with specific implementation methods.

[0016] In the description of the present invention, it should be noted that the terms "inside", "outside", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0017] like Figure 1As shown, the present invention provides an explosion-proof liquid filling plug, which includes a liquid filling plug housing 1. The liquid filling plug housing 1 comprises an inner ring 2 and an outer ring 3. The inner ring 2 defines a liquid filling hole 4. Above the liquid filling hole 4, a vent plug 5 is disposed. The vent plug 5 is mounted on the inner ring 2 and has a porous rubber structure. When pressure builds up in the battery, the vent plug 5 can discharge hydrogen. The outer ring 3 has a sealing ring 6 on its outer wall to seal the battery and prevent foreign matter from entering. The outer ring 3 has a groove 7 on its outer wall to accommodate the sealing ring 6. A liquid filling plug cover 8 is mounted on the top of the liquid filling plug housing 1. The cover 8 is mounted on the liquid filling plug housing 1 and is connected to the liquid filling plug housing 1. The cover 8 has a vent 9 to discharge hydrogen. A replaceable filter 10 is disposed between the cover 8 and the liquid filling plug housing 1. The filter 10 allows hydrogen to pass but not dust particles.

[0018] Furthermore, a protrusion 11 is provided on one side of the liquid filling plug cover 8 close to the filter plate 10 for positioning the filter plate 10 to prevent the filter plate 10 from moving.

[0019] Furthermore, a metal mesh (not shown) is provided below the filter 10. If the battery swells and produces sparks due to excessive air pressure, the metal mesh can prevent the sparks from growing larger, thereby preventing the battery from exploding.

[0020] The utility model can provide a porous vent plug 5 and vent holes 9. When air pressure is generated inside the battery, the vent plug 5 can quickly and effectively discharge hydrogen, reducing the internal pressure of the battery and improving the safety and stability of the battery. The filter 10 can effectively block dust particles while allowing hydrogen and other gases to pass through, preventing the discharge of harmful substances. The metal mesh design added below the filter 10 can promptly prevent the further spread of sparks when the battery bulges due to excessive air pressure and may produce sparks, thereby reducing the risk of battery explosion and enhancing the battery's explosion-proof performance. The sealing ring 6 and groove 7 structure provided on the outer ring ensure a good seal between the filling plug and the battery, improving the overall sealing performance of the battery.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0022] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An explosion-proof liquid injection plug, comprising a liquid injection plug housing, characterized in that: The liquid injection plug shell includes an inner ring and an outer ring, the inner ring is provided with a liquid injection hole, a breathable plug is provided above the liquid injection hole, the breathable plug is sleeved on the inner ring, and the outer wall of the outer ring is provided with a sealing ring for sealing; a liquid injection plug cover is provided on the top of the liquid injection plug shell, the liquid injection plug cover is sleeved on the liquid injection plug shell and connected to the liquid injection plug shell, an exhaust hole is provided on the liquid injection plug cover, and a filter is provided between the liquid injection plug cover and the liquid injection plug shell.

2. The explosion-proof liquid injection plug according to claim 1, characterized in that: The vent plug is a porous structure made of rubber.

3. The explosion-proof liquid injection plug according to claim 1, characterized in that: The outer wall of the outer ring is provided with a groove for accommodating the sealing ring.

4. The explosion-proof liquid injection plug according to claim 1, characterized in that: The liquid filling plug cover is threadedly connected to the outer edge of the liquid filling plug housing.

5. The explosion-proof liquid filling plug according to claim 1, characterized in that: A bulge is provided on one side of the liquid injection plug cover close to the filter plate.

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