Protective cover and valve structure
By designing a protective cover with a non-parallel exhaust section on the valve of the battery pack, the problem of dust clogging the valve was solved, and the dustproof and waterproof effect was improved.
Patent Information
- Application Number
- CN202520158496.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-22
AI Technical Summary
The explosion-proof valve and breather valve of the battery pack are easily clogged by dust and dirt, affecting the normal operation of the battery pack.
A protective cover was designed with multiple exhaust sections inside the cover and exhaust channels with non-parallel exhaust directions. The cover is placed on the exhaust end of the valve to prevent dust and impurities from entering. The cover is upside down to improve the dustproof effect.
This effectively prevents external dust and impurities from entering the valve, ensuring the valve's normal venting function and improving its dustproof and waterproof performance.
Smart Images
Figure CN223843100U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a protective cover and valve structure. Background Technology
[0002] Explosion-proof valves and breather valves are important components of battery packs. When battery packs are exposed to dusty or muddy environments for extended periods, dust and mud will accumulate on the explosion-proof valves or breather valves, causing blockages. Blockages in the explosion-proof valves will affect the battery pack's ability to open and release pressure, while blockages in the breather valves will affect the battery pack's breathing function. Utility Model Content
[0003] The explosion-proof valves and breather valves of existing battery boxes are easily covered and blocked by dust, affecting their operation. To overcome these shortcomings, the purpose of this invention is to provide a protective cover and valve structure that prevents external dust and impurities from penetrating the protective cover and entering the valve, thereby improving the safety of valve operation.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A protective cover includes a cover body for covering the outlet end of a valve. The exhaust direction of the cover body is opposite to the exhaust direction of the valve. The cover body is provided with an exhaust channel along the direction in which gas is discharged from the valve. The exhaust channel includes a plurality of exhaust sections connected in sequence, wherein at least one of the exhaust sections is not parallel to the exhaust direction of the adjacent exhaust section.
[0006] In one embodiment, the cover is a hollow groove structure with an opening on one side, enclosed by a bottom wall and a side wall. A boss is provided on the inner surface of the bottom wall of the cover, and the boss is used to install the valve. A gap is provided between the outer wall of the boss and the side wall of the cover.
[0007] In one embodiment, the exhaust passage includes a first exhaust passage and a second exhaust passage that are interconnected, wherein the exhaust directions of the first exhaust passage and the second exhaust passage are not parallel; the first exhaust passage includes a plurality of exhaust sections, and the second exhaust passage includes at least one exhaust section; the first exhaust passage is connected to the outlet end of the valve, and the second exhaust passage is used to discharge gas outside the cover.
[0008] In one embodiment, the first exhaust passage includes multiple exhaust sections, each including multiple exhaust slots and a connection port connecting adjacent exhaust slots, and the second exhaust passage is offset from the connection port.
[0009] In one embodiment, along the axial direction of the cover, a plurality of base plates are spaced apart on the inner wall of the cover, and the exhaust groove is formed between adjacent base plates; an air port is opened on the base plate near the outlet end of the cover, and the air port is the second exhaust channel; the other base plates are all opened with the connection port connecting the adjacent exhaust groove.
[0010] In one embodiment, the air vent is offset from the connection port on the adjacent substrate, and the connection ports on other adjacent substrates are also offset.
[0011] In one embodiment, a plurality of air vents are provided on the surface of the substrate near the outlet end, and a plurality of connection ports are provided on the surface of each of the other substrates. The plurality of air vents are staggered from the plurality of connection ports on the adjacent substrates, and the plurality of connection ports on the other adjacent substrates are also staggered.
[0012] In one embodiment, adjacent exhaust channels are connected end to end to form a spiral channel, and the air inlet is the opening at the end of the spiral channel near the outlet end of the cover.
[0013] This utility model also provides a valve structure, including a valve and a protective cover as described above, wherein the protective cover is disposed on the outlet end of the valve.
[0014] In one embodiment, the valve includes a valve body and a movable part connected to each other, the movable part being connected to the protective cover, and the outer wall of the valve body being tightly fitted against the inner wall of the protective cover.
[0015] The advantages of this utility model are as follows: the cover is upside down on the valve, which provides good dust and water protection; and among the multiple exhaust sections inside the cover, at least one exhaust section is not parallel to the exhaust direction of the adjacent exhaust section, that is, the gas flow direction of multiple exhaust sections is always not on the same straight line, which can effectively prevent external dust and impurities from passing through the cover and entering the valve, further improving the dust protection effect. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a protective cover according to an embodiment of the present invention;
[0018] Figure 2 yes Figure 1 A partial cross-sectional view;
[0019] Figure 3 A schematic diagram of the valve structure of an embodiment of this utility model;
[0020] Figure 4 yes Figure 3 A diagram illustrating the breakdown;
[0021] Figure 5 yes Figure 1 A schematic diagram of the structure of the protective cover installed on the battery pack;
[0022] Figure 6 This is a schematic diagram of the structure of a protective cover according to another embodiment of the present invention.
[0023] In the diagram: 100, protective cover; 1, cover body; 11, outlet end; 2, exhaust channel; 21, first exhaust channel; 211, exhaust groove; 212, connection port; 22, second exhaust channel; 3, base plate; 4, boss; 5, valve; 6, battery pack. Detailed Implementation
[0024] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.
[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0026] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0027] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.
[0028] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0029] Third-generation back-contact battery (BC) boxes or top-mounted explosion-proof valves and breather valves can become covered and blocked by dust, affecting their operation. This utility model provides a protective cover 100, such as... Figures 1 to 5 As shown, it includes a cover 1, which is used to cover the gas outlet end of the valve 5. The exhaust direction of the cover 1 is opposite to the exhaust direction of the valve 5. The valve 5 is installed on the battery pack 6. The cover 1 is provided with an exhaust channel 2, which is used to discharge the gas in the valve 5. Along the direction in which the gas is discharged from the valve 5, the exhaust channel 2 includes a plurality of exhaust sections connected in sequence, and at least one exhaust section is not parallel to the exhaust direction of the adjacent exhaust section.
[0030] In this embodiment, the cover 1 is placed over the outlet end of the valve 5, which can protect the valve 5 and has a good dustproof and waterproof effect. The multiple interconnected exhaust sections inside the cover 1 can discharge the gas discharged from the valve 5 outside the cover 1 without affecting the gas discharge of the valve. The cover 1 is inverted, which has a good dustproof and waterproof effect. Among the multiple exhaust sections inside the cover 1, at least one exhaust section is not parallel to the exhaust direction of the adjacent exhaust section. That is, the gas flow direction of multiple exhaust sections is always not on the same straight line, which can effectively prevent external dust and impurities from passing through the cover 1 and entering the valve 5, further improving the dustproof effect.
[0031] As one implementation method, such as Figure 1 and Figure 5 As shown, the exhaust channel 2 includes a first exhaust channel 21 and a second exhaust channel 22 that are interconnected. The exhaust directions of the first exhaust channel 21 and the second exhaust channel 22 are not parallel. The first exhaust channel 21 is connected to the outlet end of the valve 5. The second exhaust channel 22 is used to discharge gas outside the cover 1, so that the gas discharged by the valve 5 can flow into the cover 1 through the first exhaust channel 21 and then be discharged outside the cover 1 through the second exhaust channel 22.
[0032] In one embodiment, the first exhaust passage 21 includes multiple exhaust sections, and the second exhaust passage 22 includes at least one exhaust section. The multiple exhaust sections of the first exhaust passage 21 include multiple exhaust slots 211 and connection ports 212 connecting adjacent exhaust slots 211. The second exhaust passage 22 is staggered from the connection ports 212.
[0033] Specifically, such as Figure 2As shown, the direction indicated by the arrow is a path for the gas flow discharged from valve 5, where adjacent exhaust sections are not parallel. In this embodiment, the two adjacent exhaust sections are exhaust groove 211 and connection port 212, which are perpendicular (but not limited to this). When dust and impurities enter exhaust channel 2 through the second exhaust channel 22, the non-parallel nature of the adjacent exhaust sections makes it difficult for dust and impurities to enter valve 5. At the same time, since the second exhaust channel 22 and the connection port 212 are staggered, the gas flow direction in each exhaust groove 211 and the connection port 212 of the adjacent exhaust groove 211 is not on the same straight line as the gas flow direction in the second exhaust channel 22, thus avoiding the vertical connection between each connection port 212 and the second exhaust channel 22, which would allow external dust to directly reach valve 5 through the second exhaust channel 22 and each connection port 212.
[0034] As one implementation method, such as Figure 1 and Figure 5 As shown, along the axial direction Y of the cover 1, multiple substrates 3 are spaced apart on the inner wall of the cover 1, and exhaust grooves 211 are formed between adjacent substrates 3; an air port is opened on the substrate 3 near the outlet end 11 of the cover 1, and the air port is a second exhaust channel 22; and connection ports 212 connecting adjacent exhaust grooves 211 are opened on other substrates 3.
[0035] As one implementation method, such as Figure 1 and Figure 2 As shown, the air inlet is staggered from the connection port 212 on the adjacent substrate 3, and the connection ports 212 on other adjacent substrates 3 are also staggered to ensure that the gas flows layer by layer in the exhaust groove 211 and is finally discharged through the air inlet.
[0036] As one implementation method, such as Figure 1 and Figure 2 As shown, multiple air vents are provided on the surface of the substrate 3 near the outlet end of the cover 1, and multiple connection ports 212 are provided on the surface of each other substrate 3, which can accelerate the flow of gas from one layer to the next layer; and the multiple air vents and the multiple connection ports 212 on the adjacent substrate 3 are staggered, and the multiple connection ports 212 on the other adjacent substrate 3 are staggered to avoid the connection ports 212 and the air vents being connected vertically, so that external dust can directly reach the valve 5 through the air vents and the connection ports 212.
[0037] As one implementation method, such as Figure 6 As shown, adjacent exhaust grooves 211 are connected end to end to form a spiral groove, and the air port is the opening at the end of the spiral groove near the outlet end 11 of the cover 1 (i.e., the second exhaust channel 22). When the exhaust groove 211 is designed as a spiral structure, that is, the connection point of adjacent exhaust grooves 211 is equivalent to the connection port 212, and the air port can be arbitrarily set at the position near the outlet end 11 of the cover 1.
[0038] As one implementation method, such as Figures 1 to 5 As shown, the cover 1 is a hollow trough structure formed by opening on one side and enclosing the bottom wall and side wall. The opening side of the cover 1 is its outlet end 11. A boss 4 is provided on the inner surface of the bottom wall of the cover 1. The boss 4 is used to install the valve 5. There is a gap between the outer wall of the boss 4 and the side wall of the cover 1. The gap is connected to the exhaust groove 211 to facilitate the exhaust of the valve 5 installed on the boss 4.
[0039] This utility model also provides a valve structure, such as Figure 3 As shown, it includes a valve 5 and a protective cover 100 as described above. The protective cover 100 is installed on the outlet end of the valve 5. This valve structure can be used in areas with harsh environments such as dust, or on battery packs 6 used in mining areas.
[0040] In one embodiment, valve 5 includes a movable part (not shown) and a valve body (not shown) connected to each other. The movable part is connected to a protective cover 100, and the boss 4 of the protective cover 100 can be attached to the movable part of valve 5 with 3M adhesive. The outer wall of the valve body is tightly fitted to the inner wall of the protective cover 100 to prevent dust or impurities from entering the valve 5 through the gap between the cover 1 and the valve 5.
[0041] Specifically, when the battery pack 6 is working normally, the movable part is tightly attached to the valve body, and the gas inside the valve 5 is discharged through the airflow channel (not shown) of the valve 5 and the venting membrane (not shown) on its surface; when the gas pressure inside the battery pack 6 increases, under the action of the gas pressure, the movable part is pushed open by the gas and detached from the valve body, and the airflow is discharged through the gap between the movable part and the valve body and the venting membrane (not shown); when the battery pack 6 experiences thermal runaway, the airflow breaks through the venting membrane (not shown), the movable part is pushed open by the gas and detached from the valve body, and the airflow is discharged through the gap between the movable part and the valve body and the broken venting membrane (not shown); in all three cases, the gas discharged from the valve 5 flows through the gap between the outer wall of the boss 4 and the side wall of the cover 1 to the exhaust groove 211, and then flows along the first exhaust channel 21 (exhaust groove 211 and connection port 212) to the second exhaust channel 22 (air port) and is discharged outside the cover 1.
[0042] The cover 1 of this utility model is installed on the gas outlet end of the valve 5, and the multiple interconnected exhaust sections inside the cover 1 can discharge the gas discharged from the valve 5 outside the cover 1 so as not to affect the gas discharge of the valve; the cover 1 is upside down, which has good dustproof and waterproof effect; among the multiple exhaust sections inside the cover 1, at least one exhaust section is not parallel to the exhaust direction of the adjacent exhaust section, that is, the gas flow direction of multiple exhaust sections is always not on the same straight line, which can effectively prevent external dust and impurities from passing through the cover 1 and entering the valve 5, further improving the dustproof effect.
[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present utility model. These are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A protective cover, comprising a cover body (1), said cover body (1) being used to cover the air outlet end of a valve (5), characterized in that, The exhaust direction of the cover (1) is opposite to that of the valve (5). The cover (1) is provided with an exhaust channel (2) along the direction in which the gas is discharged from the valve (5). The exhaust channel (2) includes a plurality of exhaust sections connected in sequence, wherein at least one of the exhaust sections is not parallel to the exhaust direction of the adjacent exhaust section.
2. The protective cover as described in claim 1, characterized in that, The cover (1) is a hollow groove structure with an opening on one side and enclosed by a bottom wall and a side wall. A boss (4) is provided on the inner surface of the bottom wall of the cover (1), and the boss (4) is used to install the valve (5). There is a gap between the outer wall of the boss (4) and the side wall of the cover (1).
3. The protective cover as described in claim 1, characterized in that, The exhaust channel (2) includes a first exhaust channel (21) and a second exhaust channel (22) that are interconnected. The exhaust directions of the first exhaust channel (21) and the second exhaust channel (22) are not parallel. The first exhaust channel (21) includes a plurality of exhaust sections, and the second exhaust channel (22) includes at least one exhaust section. The first exhaust channel (21) is connected to the outlet end of the valve (5), and the second exhaust channel (22) is used to discharge gas outside the cover (1).
4. The protective cover as described in claim 3, characterized in that, The first exhaust passage (21) includes multiple exhaust sections including multiple exhaust slots (211) and connecting ports (212) connecting adjacent exhaust slots (211), and the second exhaust passage (22) is offset from the connecting ports (212).
5. The protective cover as described in claim 4, characterized in that, Along the axial direction (Y) of the cover (1), a plurality of base plates (3) are spaced apart on the inner wall of the cover (1), and the exhaust groove (211) is formed between adjacent base plates (3); an air port is opened on the base plate (3) near the outlet end (11) of the cover (1), and the air port is the second exhaust channel (22). Except for the base plate (3) near the outlet end (11) of the cover (1), the other base plates (3) are all provided with the connection port (212) connecting the adjacent exhaust groove (211).
6. The protective cover as described in claim 5, characterized in that, The air vent is offset from the connection port (212) on the adjacent substrate (3), and the connection ports (212) on the other adjacent substrates (3) are offset except for the substrate (3) near the outlet end (11) of the cover (1).
7. The protective cover as described in claim 5, characterized in that, Multiple air vents are provided on the surface of the substrate (3) near the outlet end (11). Multiple connection ports (212) are provided on the surface of each substrate (3) except the substrate (3) near the outlet end (11) of the cover (1). The multiple air vents are staggered from the multiple connection ports (212) on the adjacent substrate (3). The multiple connection ports (212) on the adjacent substrate (3) except the substrate (3) near the outlet end (11) of the cover (1) are staggered.
8. The protective cover as described in claim 5, characterized in that, The adjacent exhaust channels (211) are connected end to end to form a spiral channel, and the air port is the opening of the spiral channel at the outlet end (11) near the cover (1).
9. A valve structure, characterized in that, It includes a valve (5) and a protective cover (100) as described in any one of claims 1-8, the protective cover (100) being disposed over the outlet end of the valve (5).
10. The valve structure as described in claim 9, characterized in that, The valve (5) includes a valve body and a movable part connected to each other. The movable part is connected to the protective cover (100), and the outer wall of the valve body is tightly fitted to the inner wall of the protective cover (100).