Battery explosion-proof valve

Abstract

The utility model discloses a battery explosion-proof valve which comprises a top cover piece and an explosion-proof valve piece, the top cover piece is arranged on the outer side of the explosion-proof valve piece in a surrounding mode, a nick is arranged on the explosion-proof valve piece, the nick is located in the direction of the inner side of the top cover piece and arranged in a runway shape, and the battery explosion-proof valve further comprises an annular reinforcing rib which is of a folding structure with a wavy section and arranged on the outer side of the nick in a surrounding mode. The elastic buffer layer is arranged on the outer side of the annular reinforcing rib in a surrounding manner; and the honeycomb support array is arranged on the outer side of the elastic buffer layer in a surrounding manner and comprises a plurality of regular hexagonal structure units. Thus, through the wavy folding structure of the annular reinforcing rib and the elastic buffer layer on the outer side, external extrusion force can be effectively dispersed and absorbed, and the situation that the structure at the nick position is damaged due to extrusion of the anti-explosion valve plate is prevented; the arranged honeycomb support array can improve the compressive strength; and vibration energy is absorbed and slowed down from multiple levels, so that the influence of vibration on the nick of the explosion-proof valve is greatly reduced, the integrity of the nick is ensured, and an accurate explosion point value is maintained.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery top cover parts, and in particular to a battery explosion-proof valve. Background Technology

[0002] An explosion-proof valve for new energy batteries is a safety valve used in battery modules or energy storage devices. Its main function is to monitor the internal pressure and temperature of the battery. When the pressure or temperature exceeds a set value, the explosion-proof valve will rupture at the scored point to release pressure, thereby reducing the internal pressure of the battery and preventing an explosion. The burst point value of the explosion-proof valve plate is directly related to the safety of the battery.

[0003] Currently, conventional explosion-proof sheets typically have a groove etched around the center of the aluminum sheet, such as... Figure 1 As shown, the actual thickness at the etched area is extremely small, with the lowest residual thickness being less than 0.05mm. This results in low structural strength at this location. After the explosion-proof valve is assembled and welded onto the battery, the battery may experience vibration and bumps in its actual working environment. This environment is very unfavorable to the structure of conventional explosion-proof valves, and the etched residue is easily damaged, which in turn affects the explosion point value of the explosion-proof plate and reduces battery safety.

[0004] Although existing new-structure explosion-proof valves have reinforcing ribs designed on the outside of the grooves, which can prevent vibration from damaging the weak parts of the grooves to a certain extent, there is still room for improvement. In order to further improve the anti-squeezing and anti-vibration performance of the explosion-proof valve, a new type of battery explosion-proof valve is urgently needed. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a battery explosion-proof valve.

[0006] This utility model discloses a battery explosion-proof valve, including a top cover and an explosion-proof valve plate. The top cover surrounds the outer side of the explosion-proof valve plate. The explosion-proof valve plate has grooves located on the inner side of the top cover and arranged in a racetrack shape. It also includes:

[0007] The annular reinforcing rib is designed as a folded structure with a wavy cross-section and is arranged around the outside of the notch;

[0008] An elastic buffer layer is provided around the outside of the annular reinforcing rib;

[0009] A cellular support array, surrounding the outer side of the elastic buffer layer, comprises multiple regular hexagonal structural units.

[0010] In this way, vibration energy is absorbed and mitigated from multiple levels, greatly reducing the impact of vibration on the explosion-proof valve's grooves, ensuring the integrity of the grooves, and maintaining accurate explosion point values.

[0011] Preferably, the top cover plate has multiple hemispherical shock-absorbing protrusions at its edge, and the multiple shock-absorbing protrusions are evenly spaced along the circumference of the top cover plate.

[0012] In this way, the shock-absorbing protrusions can absorb vibration energy through their own elastic deformation, reducing the impact of vibration on the explosion-proof valve.

[0013] Preferably, in the folded structure of the annular reinforcing rib, a micro damping element is provided between adjacent folded portions.

[0014] Thus, when the annular reinforcing rib undergoes elastic deformation, it provides damping force, reduces the vibration frequency and amplitude of the annular reinforcing rib, and further improves the protective effect of the annular reinforcing rib against the scratches.

[0015] Preferably, the micro damping element adopts a rubber damping block or damping spring structure.

[0016] Preferably, the elastic buffer layer is made of silicone or other elastic materials.

[0017] In this way, it plays a role in buffering and shock absorption, reducing the direct impact of external forces on the explosion-proof valve plate and the annular reinforcing rib.

[0018] Preferably, the elastic buffer layer is fixedly connected by bonding or integral molding.

[0019] This ensures the strength of the connection.

[0020] Preferably, the side length of the regular hexagonal unit of the honeycomb support array is set to 0.8-1.2 mm, and the wall thickness is 60-70% of the thickness of the explosion-proof valve plate.

[0021] In this way, the ring-shaped reinforcing ribs and elastic buffer layer work together to provide protection and improve compressive strength.

[0022] In summary, this utility model has the following beneficial effects: the wave-shaped folded structure of the annular reinforcing ribs and the elastic buffer layer on the outside can effectively disperse and absorb external extrusion pressure, prevent the explosion-proof valve body from being damaged by extrusion at the scored area, and ensure that the explosion-proof valve can still work normally when subjected to extrusion; the honeycomb support array can improve compressive strength; thus, vibration energy is absorbed and mitigated from multiple levels, greatly reducing the impact of vibration on the explosion-proof valve's scored area, ensuring the integrity of the scored area, and maintaining an accurate explosion point value.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 A schematic diagram of an existing explosion-proof valve with only scoring.

[0025] Figure 2 This is a schematic diagram of the structure of the battery explosion-proof valve according to an embodiment of the present invention.

[0026] Figure 2 middle:

[0027] 1. Top cover plate; 2. Explosion-proof valve plate; 3. Score; 4. Annular reinforcing rib; 5. Elastic buffer layer; 6. Honeycomb support array; 7. Shock-absorbing protrusion. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] like Figure 2 As shown, this embodiment proposes a battery explosion-proof valve, including a top cover plate 1 and an explosion-proof valve plate 2. The top cover plate 1 surrounds the outer side of the explosion-proof valve plate 2. The explosion-proof valve plate 2 is provided with a notch 3 (for pressure relief). The notch 3 is located on the inner side of the top cover plate 1 and is arranged in a racetrack shape. The valve also includes:

[0030] The annular reinforcing rib 4 is designed as a folded structure with a wavy cross-section and is arranged around the outside of the notch 3;

[0031] Among them, the wave-shaped structure can undergo elastic deformation when subjected to compression or vibration, absorbing and dispersing external forces, and further protecting the scoring structure.

[0032] An elastic buffer layer 5 is provided around the outside of the annular reinforcing rib 4;

[0033] Specifically, the elastic buffer layer 5 is made of silicone or other elastic materials. The elastic buffer layer 5 can buffer and dampen shocks when the explosion-proof valve is subjected to external pressure or vibration, reducing the direct impact of external forces on the explosion-proof valve plate 2 and the annular reinforcing rib 4. At the same time, the elastic buffer layer 5 is fixedly connected to the explosion-proof valve plate 2 by bonding or integral molding, ensuring a strong connection.

[0034] The cellular support array 6 surrounds the outer side of the elastic buffer layer 5 and includes multiple regular hexagonal structural units.

[0035] Specifically, the hexagonal units of the cellular support array 6 (only a portion is shown in the figure; the entire portion surrounds the outer side of the elastic buffer layer 5) have a side length of 0.8-1.2 mm and a wall thickness of 60-70% of the thickness of the explosion-proof valve plate 2. They work in conjunction with the annular reinforcing ribs 4 and the elastic buffer layer 5 to provide protection and improve compressive strength.

[0036] Thus, the wavy folded structure of the annular reinforcing rib 4 and the outer elastic buffer layer 5 effectively disperse and absorb external compressive force, preventing damage to the structure at the notch 3 caused by compression of the explosion-proof valve plate 2, ensuring that the explosion-proof valve can still function normally under compression; the honeycomb support array 6 can improve compressive strength; thus, vibration energy is absorbed and mitigated from multiple levels, greatly reducing the impact of vibration on the notch 3 of the explosion-proof valve, ensuring the integrity of the notch 3, and maintaining an accurate explosion point value. All components are fixed through a reasonable connection method, resulting in a robust overall structure that can adapt to complex working environments, improving the reliability and service life of the explosion-proof valve.

[0037] Furthermore, the top cover 1 has multiple hemispherical shock-absorbing protrusions 7 at its edge, and these protrusions 7 are evenly spaced along the circumference of the top cover 1. When the explosion-proof valve is subjected to vibration, the shock-absorbing protrusions 7 can contact other internal components or the outer casing of the battery, absorbing vibration energy through their own elastic deformation, thus reducing the impact of vibration on the explosion-proof valve.

[0038] In this embodiment, a micro-damping element is provided between adjacent folded portions in the folded structure of the annular reinforcing rib 4. Specifically, the micro-damping element adopts a structure such as a rubber damping block or a damping spring, and its function is to provide damping force when the annular reinforcing rib 4 undergoes elastic deformation, thereby reducing the vibration frequency and amplitude of the annular reinforcing rib 4 and further improving the protective effect of the annular reinforcing rib 4 on the scratch 3.

[0039] In summary, the micro-damping components in the shock-absorbing protrusion 7, the elastic buffer layer 5, and the annular reinforcing rib 4 work together to absorb and mitigate vibration energy from multiple levels, greatly reducing the impact of vibration on the explosion-proof valve's grooves, ensuring the integrity of the grooves, and maintaining accurate explosion point values.

[0040] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A battery explosion-proof valve, comprising a top cover and an explosion-proof valve plate, the top cover surrounding the outer side of the explosion-proof valve plate, the explosion-proof valve plate having grooves located on the inner side of the top cover and arranged in a racetrack shape, characterized in that, Also includes: The annular reinforcing rib is designed as a folded structure with a wavy cross-section and is arranged around the outside of the notch; An elastic buffer layer is provided around the outside of the annular reinforcing rib; A cellular support array, surrounding the outer side of the elastic buffer layer, comprises multiple regular hexagonal structural units.

2. The battery explosion-proof valve according to claim 1, characterized in that, The top cover plate has multiple hemispherical shock-absorbing protrusions at its edge, and these protrusions are evenly spaced along the circumference of the top cover plate.

3. The battery explosion-proof valve according to claim 1, characterized in that, In the folded structure of the annular reinforcing rib, a micro damping element is provided between adjacent folded portions.

4. The battery explosion-proof valve according to claim 3, characterized in that, The miniature damping component adopts a rubber damping block or damping spring structure.

5. The battery explosion-proof valve according to claim 1, characterized in that, The elastic buffer layer is made of silicone material.

6. The battery explosion-proof valve according to claim 5, characterized in that, The elastic buffer layer is fixedly connected by bonding or integral molding.

7. The battery explosion-proof valve according to claim 1, characterized in that, The hexagonal unit of the honeycomb support array has a side length of 0.8-1.2 mm and a wall thickness of 60-70% of the thickness of the explosion-proof valve plate.

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