One-way explosion-proof valve for preventing silt and volcanic ash

Abstract

The utility model relates to battery pack technical field especially relates to a one -way explosion -proof valve of preventing silt, volcanic ash, the one -way explosion -proof valve is narrow in the trapezoidal groove of upper wide in upper sealing groove, is provided with annular guide groove outside valve body, is provided with annular dustproof groove below the dustproof baffle strip of annular protrusion on valve body upper end, when the valve cover is in the closed position, dustproof baffle strip embeds in dustproof groove, and the inner edge of valve cover supports on upper sealing piece. The valve cover and valve body form a U -shaped exhaust passage in cooperation, effectively block the splash mixture of silt and water to enter the explosion -proof valve inside, prevent the upper sealing piece from being blown away when high -pressure airflow passes through through the interference of upper sealing piece and trapezoidal upper sealing groove, realize more stable use effect.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a one-way explosion-proof valve that prevents mud, sand and volcanic ash. Background Technology

[0002] The battery pack is a crucial component of new energy vehicles, consisting of numerous individual battery cells connected in series and parallel to form modules. The vast majority of safety incidents in new energy vehicles are caused by battery pack malfunctions. For example, abnormal temperature rise in individual cells during charging and discharging can lead to a pressure difference between the inside and outside of the battery pack. To prevent thermal runaway and avoid pressure imbalances, explosion-proof valves are typically installed on the battery casing.

[0003] With the development of power battery system technology, existing technologies mostly use immersion cooling to reduce battery pack temperature. However, the vent membrane of the original explosion-proof valve becomes sticky with coolant, causing the venting effect to fail, which limits the venting effect in practical applications. In actual use, existing one-way explosion-proof valves often splash mud and water when vehicles drive over muddy roads. Because the pressure relief channel is directly connected to the outside, and the explosion-proof valve is installed on the side, mud, sand, volcanic ash, etc., adhere to it and easily accumulate after vibration during vehicle operation, blocking the valve opening and causing the explosion-proof valve to fail to open. In addition, the O-rings commonly used in the current explosion-proof valve sealing technology are prone to sliding and falling off when the valve cover is opened during the explosion-proof valve's venting operation. Moreover, the airflow velocity from the inside to the outside during the explosion-proof valve's venting operation is extremely fast, which can blow the sealing ring off, resulting in the sealing effect failing after venting. Therefore, there is an urgent need for a one-way pressure relief explosion-proof valve that can effectively prevent mud, sand, and volcanic ash from entering, in order to achieve a more stable and durable explosion-proof pressure relief effect. Utility Model Content

[0004] The purpose of this utility model is to provide a one-way explosion-proof valve that prevents mud and volcanic ash from blocking the exhaust channel of the explosion-proof valve and causing the upper sealing element to detach from the upper sealing groove during the exhaust process, resulting in sealing failure after exhaust.

[0005] Specifically, it is a one-way explosion-proof valve for preventing mud, sand, and volcanic ash, comprising: a valve body with a hollowed-out exhaust channel, an upper sealing groove at the upper end of the valve body, a lower sealing groove at the lower end of the valve body, an upper sealing element in the upper sealing groove, and a lower sealing element in the lower sealing groove; a valve cover movably mounted on the valve body and having an open position for opening the exhaust channel and a closed position for closing the exhaust channel; a guide rod connected to the valve cover and passing through the valve body; and an elastic element configured to apply force to the guide rod so that the valve cover always tends to move towards the closed position. The upper sealing groove is a trapezoidal groove that is narrower at the top and wider at the bottom; an annular guide groove is provided on the outer side of the valve body; an annular raised dustproof strip is provided at the upper end of the valve body, and an annular dustproof groove is provided below the corresponding valve cover; when the valve cover is in the closed position, the dustproof strip is inserted into the dustproof groove, and the inner edge of the valve cover is supported on the upper sealing element.

[0006] Preferably, the valve body has a guide groove at its center, and the guide rod slides through the guide groove.

[0007] Preferably, the elastic element is sleeved on the guide rod, and the two ends of the elastic element abut against the bottom end of the guide rod and the outer edge of the guide groove, respectively.

[0008] Preferably, the elastic element is a compression spring.

[0009] Preferably, the guide rod and the valve cover are connected by threads.

[0010] Preferably, the valve body has mounting portions on both sides, and the mounting portions have mounting holes.

[0011] Preferably, the inner wall of the dustproof strip is inclined from the inside out, and the corresponding dustproof groove is inclined in the opposite direction to the inner wall of the dustproof strip.

[0012] Preferably, the upper seal is a self-lubricating rubber sealing ring, and irregularly shaped protrusions are provided on both sides of the upper seal.

[0013] Preferably, the lower seal is a rubber sealing ring, and irregularly shaped protrusions are provided on both sides of the lower seal, with a number of protrusions evenly distributed on the irregularly shaped protrusions.

[0014] Preferably, a magnetic groove is provided on the inner side of the valve cover, and a magnetic sheet is provided in the magnetic groove. Beneficial effects

[0015] This invention eliminates the vent membrane, allowing for one-way exhaust. The valve cover and valve body work together to form a U-shaped exhaust channel, effectively preventing splashed mud and water mixtures from entering the explosion-proof valve. By utilizing the vibrations generated during vehicle operation, the side-mounted design and the inclined inner wall of the dustproof strip effectively solve the problem of valve failure caused by the accumulation of mud, dust, and volcanic ash.

[0016] This utility model uses an irregularly shaped upper sealing element to cooperate with a trapezoidal upper sealing groove. The interference between the upper sealing element and the trapezoidal upper sealing groove prevents the upper sealing ring from being blown away when high-pressure airflow passes through, thus solving the problem of the upper sealing ring falling off. In addition, the upper sealing element adopts a self-lubricating process, which not only solves the problem of the valve cover compressing and adhering to the upper sealing element for a long time, but also forms an oil film on the surface of the upper sealing element, enhancing its waterproof ability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is an exploded view of the overall structure of an embodiment of this utility model; Figure 3 This is a schematic diagram of the valve body structure according to an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the overall structure of an embodiment of the present utility model; Figure 5 This is an embodiment of the present utility model. Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a cross-sectional view of the usage state of an embodiment of this utility model; Figure 7 This is an embodiment of the present utility model. Figure 6 Enlarged schematic diagram of the structure at point B; exist Figures 1 to 7 The correspondence between component names or lines and the attached drawing numbers is as follows: Valve body-1, Mounting part-101, Guide groove-102, Upper sealing groove-103, Lower sealing groove-104, Dustproof strip-105, Guide groove-106, Valve cover-2, Dustproof groove-201, Magnetic plate groove-202, Guide rod-3, Elastic element-4, Lower sealing element-5, Upper sealing element-6, Irregular convex strip-601, Magnetic plate-7, Battery pack housing-8. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] Furthermore, it should be understood that the terms "center," "vertical," "horizontal," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "vertical," and "horizontal" in this utility model are based on the orientation or positional relationship shown in the accompanying drawings and are only for the purpose of describing this utility model. They are not intended to indicate or imply that the device or element referred to must have this specific orientation or operate in a specific orientation, and should not be construed as a limitation of this utility model.

[0020] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] This embodiment provides a one-way explosion-proof valve that prevents mud and volcanic ash from entering. The one-way explosion-proof valve is installed on the side of the battery pack and is used to solve the problems in the prior art where mud and volcanic ash block the exhaust channel of the explosion-proof valve and the upper seal detaches from the upper sealing groove during the exhaust process, resulting in seal failure after exhaust.

[0023] See details Figure 1 and Figure 2 As shown, the one-way explosion-proof valve for preventing mud and volcanic ash includes: a valve body 1, a valve cover 2, a guide rod 3, and an elastic element 4. The valve body 1 serves as the main body of the entire one-way explosion-proof valve and is used to house other structural components. The valve body 1 has a hollowed-out exhaust channel, and the upper end of the valve body 1 has an upper sealing groove 103, and the lower end of the valve body 1 has a lower sealing groove 104. An upper sealing element 6 is installed in the upper sealing groove 103, and a lower sealing element 5 is installed in the lower sealing groove 104. The valve cover 2 is movably mounted on the valve body 1 and has an open position for opening the exhaust channel and a closed position for closing the exhaust channel. The guide rod 3 is connected to the valve cover 2 and passes through the valve body 1. It is configured to apply force to the guide rod 3 so that the valve cover 2 always tends to move towards the closed position. When the internal air pressure of the battery pack increases, the air pressure pushes the guide rod 3 upward, the guide rod 3 compresses the elastic element 4, and drives the valve cover 2 to open the exhaust channel. The opening degree of the exhaust channel is directly proportional to the magnitude of the air pressure. The upper sealing element 6 of the one-way explosion-proof valve is usually an O-ring. However, during the exhaust operation of the one-way explosion-proof valve, the O-ring is easily detached when the valve cover 2 is opened. In addition, the airflow speed from the inside to the outside is extremely fast when the one-way explosion-proof valve is venting, which blows the O-ring off, thus causing the sealing effect to fail after venting.

[0024] In this regard, such as Figure 5 As shown, the one-way explosion-proof valve provided in this embodiment also includes: the upper sealing groove 103 is a trapezoidal groove that is narrow at the top and wide at the bottom; the trapezoidal groove that is narrow at the top and wide at the bottom can firmly fix the upper sealing element 6 in the groove by interference fit, so as to prevent the rapid airflow from blowing it off when the one-way explosion-proof valve is venting, which would cause the sealing effect to fail after venting.

[0025] In actual use, vehicles often splash mud and water when passing through muddy roads. Because the pressure relief channel is directly connected to the outside, and the one-way explosion-proof valve is installed on the side, mud, sand, volcanic ash, etc., tend to accumulate after vibration during vehicle operation, blocking the valve from opening and causing the one-way explosion-proof valve to fail to open.

[0026] In this regard, such as Figure 4 and Figure 6 As shown, the one-way explosion-proof valve provided in this embodiment also includes a guide groove 106. When the one-way explosion-proof valve is installed on the side of the battery pack housing 8, the mud and water splashed on the one-way explosion-proof valve will flow down along the guide groove 106 to avoid flowing to the valve cover 2 and the exhaust channel.

[0027] like Figure 4 and Figure 6 As shown, the one-way explosion-proof valve provided in this embodiment also includes a dustproof strip 105 and a dustproof groove 201. The upper end of the valve body 1 is provided with an annular raised dustproof strip 105, and the corresponding valve cover 2 has an annular dustproof groove 201 below it. When the valve cover 2 is in the closed position, the dustproof strip 105 is inserted into the dustproof groove 201, and the inner edge of the valve cover 2 is supported on the upper sealing member 6 to seal the exhaust channel. The dustproof strip 105 and the dustproof groove 201 cooperate to form a narrow U-shaped exhaust channel, preventing large particles from entering. The upper sealing member 6 blocks the exhaust channel, preventing direct communication between the inside of the exhaust channel and the outside, thereby effectively preventing mud, water, or sand from entering the one-way explosion-proof valve from the front and sides. When the valve cover 2 is in the open position, the gas inside the battery pack is rapidly discharged. Due to the obstruction of the dustproof strip 105, the gas flow direction is changed from directly outward to upward and then outward, alleviating the direct gas blowing and effectively preventing the upper sealing member 6 from being blown away.

[0028] like Figure 3 and Figure 4 As shown, in this embodiment, the valve body 1 has a guide groove 102 at its center, and the guide rod 3 slides through the guide groove 102. An elastic element 4 is sleeved on the guide rod 3. The longitudinal section of the guide rod 2 is inverted T-shaped, and the two ends of the elastic element 4 abut against the bottom end of the guide rod 3 and the outer edge of the guide groove 102, respectively. The elastic element 4 is a compression spring, which, when sleeved on the guide rod 3, prevents the elastic element 4 from tilting during deformation and ensures the stability of the elastic force direction.

[0029] In this embodiment, the guide rod 3 and the valve cover 2 can be connected by either a threaded connection or an interference fit; a threaded connection is preferred in this embodiment. Furthermore, since the one-way explosion-proof valve experiences significant vibration and complex operating conditions during use, an adhesive bonding process is employed to extend the service life of the threaded connection.

[0030] In this embodiment, the valve body 1 is provided with mounting parts 101 on both sides, and the mounting parts 101 are provided with mounting holes. The one-way explosion-proof valve can be installed on the battery pack housing 8 through the mounting holes and bolts.

[0031] like Figure 7 As shown, the inner wall of the dustproof strip 105 is inclined from the inside out, narrower at the inside and wider at the outside. The corresponding dustproof groove 201, with its side wall near the outer wall of the dustproof strip 105, is inclined in the opposite direction to the inner wall of the dustproof strip. This design adds inclined guides to the U-shaped channel formed by the valve body 1 and the valve cover 2, connecting the inner wall of the dustproof strip 105 and the side wall of the dustproof groove 201. By installing a one-way explosion-proof valve on the side, the vibration generated during vehicle operation prevents the accumulation of fine dust such as dust and volcanic ash, and guides the fine dust through the U-shaped channel to the one-way explosion-proof valve. The inclination angle of the inner wall of the dustproof strip and the side wall of the dustproof groove is not limited and need not be the same; it can be any angle from 1° to 45°. For example, it can be 4°, 5°, 6°, 8°, 10°, etc., but in this embodiment, 5° is preferred.

[0032] In this embodiment, the upper seal 6 is a self-lubricating rubber sealing ring. By directly incorporating a solid lubricant into the rubber substrate, the upper seal acquires self-lubricating capability. This solves the problem of long-term compression and adhesion of the upper seal by the valve cover, and also forms an oil film on the surface of the upper seal, enhancing its waterproof capability. The upper seal 6 has irregularly shaped protrusions 601 on both sides, which, together with the trapezoidal groove 103 (narrower at the top and wider at the bottom), further securely fix the upper seal 6 within the groove.

[0033] In this embodiment, the lower seal 5 is a rubber sealing ring. The lower seal 5 has irregularly shaped protrusions on both sides, and several protrusions are evenly distributed on the irregularly shaped protrusions. This can firmly fix the lower seal 5 in the lower sealing groove 104 to prevent it from falling off. The valve body 1 is sealed to the battery pack housing 8 through the lower seal 5 to ensure a good installation and sealing effect between the one-way explosion-proof valve and the battery pack.

[0034] like Figure 2 As shown, in this embodiment, a magnetic strip groove 202 is provided on the inner side of the valve cover 2, and a magnetic strip 7 is provided in the magnetic strip groove 202. During air intake detection, the magnetic strip 7 is attracted by the internal magnet of the tooling to pull the valve cover 2 upward, so that the inner and outer channels are connected, which facilitates air intake detection.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A one-way explosion-proof valve for preventing mud, sand, and volcanic ash, comprising: Valve body (1), the valve body (1) has a hollowed-out exhaust channel, and the upper end of the valve body (1) has an upper sealing groove (103), the lower end of the valve body (1) has a lower sealing groove (104), the upper sealing groove (103) has an upper sealing element (6), and the lower sealing groove (104) has a lower sealing element (5); valve cover (2), the valve cover (2) is movably disposed on the valve body (1) and has an open position for opening the exhaust channel and a closed position for closing the exhaust channel; guide rod (3), the guide rod (3) is connected to the valve cover (2) and passes through the valve body (1); elastic element (4), is configured to apply force to the guide rod (3) so that the valve cover (2) always has a tendency to move towards the closed position; The upper sealing groove (103) is a trapezoidal groove that is narrow at the top and wide at the bottom; an annular guide groove (106) is provided on the outer side of the valve body (1); an annular raised dustproof strip (105) is provided on the upper end of the valve body (1), and an annular dustproof groove (201) is provided on the lower part of the corresponding valve cover (2); when the valve cover (2) is in the closed position, the dustproof strip (105) is inserted into the dustproof groove (201), and the inner edge of the valve cover (2) is supported on the upper sealing member (6).

2. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 1, characterized in that, The valve body (1) has a guide groove (102) at its center, and the guide rod (3) slides through the guide groove (102).

3. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 2, characterized in that, The elastic element (4) is sleeved on the guide rod (3), and the two ends of the elastic element (4) abut against the bottom end of the guide rod (3) and the outer edge of the guide groove (102), respectively.

4. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 1, characterized in that, The elastic element (4) is a compression spring.

5. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 1, characterized in that, The guide rod (3) and the valve cover (2) are connected by a thread.

6. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 1, characterized in that, The valve body (1) has mounting parts (101) on both sides, and the mounting parts (101) have mounting holes.

7. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 1, characterized in that, The inner wall of the dustproof strip (105) is inclined from the inside to the outside, and the corresponding dustproof groove (201) is inclined in the opposite direction to the inner wall of the dustproof strip (105) near the outer wall of the dustproof strip (105).

8. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 1, characterized in that, The upper seal (6) is a self-lubricating rubber seal ring, and the upper seal (6) has irregularly shaped protrusions (601) on both sides.

9. The one-way explosion-proof valve against mud, sand, and volcanic ash according to claim 1, characterized in that, The lower seal (5) is a rubber sealing ring. The lower seal (5) has irregularly shaped protrusions on both sides, and several protrusions are evenly distributed on the irregularly shaped protrusions.

10. The one-way explosion-proof valve for preventing mud and volcanic ash as described in any one of claims 1-9, characterized in that, The valve cover (2) has a magnetic groove (202) inside, and a magnetic sheet (7) is provided in the magnetic groove (202).

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