Explosion-proof valve, battery and vehicle

Abstract

The utility model relates to an explosion-proof valve, battery and vehicle, the explosion-proof valve comprises a valve body and a reinforcing part, the valve body is provided with a thinning area, the reinforcing part comprises a first reinforcing part and a second reinforcing part, the first reinforcing part is arranged on the thinning area, the second reinforcing part is arranged on the first reinforcing part, and the first reinforcing part is arranged on the thinning area. The first reinforcing part and the second reinforcing part protrude in the thickness direction of the thinning area. When the pressure borne by the explosion-proof valve changes greatly, the deformation amplitude is small, fatigue cracking is not prone to occurring, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to an explosion-proof valve, a battery and a vehicle. Background Art

[0002] In order to increase the driving range of new energy vehicles, the size of batteries is gradually increasing. In order to ensure the safety of batteries during use, explosion-proof valves need to be installed on the batteries. When the batteries are subjected to special circumstances (such as thermal runaway and short circuit, etc.), the explosion-proof valves can be opened in time to discharge the gas generated inside the batteries to improve the safety of the batteries.

[0003] In the related art, the thinned area of ​​the explosion-proof valve is usually provided with a reinforcement portion. Specifically, the reinforcement portion of the thinned area of ​​the scored lines is a single convex hull structure. When the pressure on the explosion-proof valve of the battery changes significantly, the convex hull area of ​​the thinned area of ​​the scored lines will also produce a large degree of deformation, which will cause the valve body to be prone to fatigue cracking, affecting the service life of the explosion-proof valve. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the utility model provides an explosion-proof valve, which has a small deformation amplitude when the pressure to which the explosion-proof valve is subjected changes greatly, is not prone to fatigue cracking, and has a long service life.

[0006] The embodiment of the utility model further provides a battery.

[0007] An embodiment of the utility model further provides a vehicle.

[0008] The explosion-proof valve of an embodiment of the utility model comprises: a valve body, on which a thinning area is provided; a reinforcing portion, which comprises a first reinforcing portion and a second reinforcing portion, wherein the first reinforcing portion is provided on the thinning area, and the second reinforcing portion is provided on the first reinforcing portion, and both the first reinforcing portion and the second reinforcing portion protrude along the thickness direction of the thinning area.

[0009] According to the explosion-proof valve of the embodiment of the utility model, when the pressure on the explosion-proof valve changes greatly, since the first reinforcement part is arranged on the thinning area, the structure of the thinning area can be reinforced by the first reinforcement part to avoid large deformation of the thinning area. Since the second reinforcement part is arranged on the first reinforcement part, the structure of the first reinforcement part can be reinforced to further avoid large deformation of the area of ​​the first reinforcement part, thereby reducing the deformation amplitude of the whole valve body, reducing the problem of fatigue cracking of the valve body, and prolonging the service life.

[0010] In some embodiments, an outer peripheral profile of at least one of the first reinforcement portion and the second reinforcement portion is in an "X" shape.

[0011] In some embodiments, the included angle of the "X" shape is A, where 15°≤A≤120°.

[0012] In some embodiments, the explosion-proof valve has an X-axis and a Y-axis, the direction of the X-axis, the direction of the Y-axis, and the thickness direction of the thinning zone are perpendicular to each other, and the X-axis and the Y-axis both pass through the center of the valve body; at least one of the first reinforcement portion and the second reinforcement portion is symmetrical about the X-axis or the Y-axis, or at least one of the first reinforcement portion and the second reinforcement portion is symmetrical about the center of the valve body.

[0013] In some embodiments, there are multiple first reinforcing parts, and the multiple first reinforcing parts are connected in sequence along the X-axis direction or the Y-axis direction; and / or, there are multiple second reinforcing parts, and the multiple second reinforcing parts are arranged in sequence along the X-axis direction or the Y-axis direction.

[0014] In some embodiments, at least one of the first reinforcement portion and the second reinforcement portion includes a main body portion and a plurality of branch portions; the plurality of branch portions are connected to the main body portion and are arranged at intervals along the circumference of the main body portion; each of the branch portions extends toward the boundary line of the thinning zone and has a distance from the boundary line of the thinning zone.

[0015] In some embodiments, the first reinforcement portion and the second reinforcement portion protrude toward the same side in the thickness direction of the valve body; or, one of the first reinforcement portion and the second reinforcement portion protrudes toward one side in the thickness direction of the valve body, and the other of the first reinforcement portion and the second reinforcement portion protrudes toward the other side in the thickness direction of the valve body.

[0016] In some embodiments, the protruding height of the first reinforcing portion is H1, and the protruding height of the second reinforcing portion is H2; wherein H2≤H1.

[0017] In some embodiments, 0.05 mm ≤ H2 ≤ H1 ≤ 2 mm.

[0018] In some embodiments, the orthographic projection area of ​​the first reinforcement portion in the thinning region is S1, and the area of ​​the thinning region on the valve body is S2, wherein 0.1≤S1 / (S2-S1)≤0.7.

[0019] A battery according to another embodiment of the present invention comprises a battery cell, a battery shell and an explosion-proof valve according to any one of the embodiments of the present invention, wherein the battery cell is arranged in the battery shell, and the explosion-proof valve is arranged on the battery shell.

[0020] According to the battery of the embodiment of the utility model, when the pressure on the explosion-proof valve of the battery changes greatly, since the first reinforcement part is arranged on the thinning area, the structure of the thinning area can be reinforced by the first reinforcement part to avoid large deformation of the thinning area. Since the second reinforcement part is arranged on the first reinforcement part, the structure of the first reinforcement part can be reinforced to further avoid large deformation of the area of ​​the first reinforcement part, thereby reducing the deformation amplitude of the valve body, reducing the problem of fatigue cracking of the valve body, and extending the service life.

[0021] A vehicle according to another embodiment of the present invention comprises the battery according to the embodiment of the present invention.

[0022] According to the vehicle of the embodiment of the utility model, when the pressure on the explosion-proof valve of the battery changes greatly, since the first reinforcement part is arranged on the thinning area, the structure of the thinning area can be reinforced by the first reinforcement part to avoid large deformation of the thinning area. Since the second reinforcement part is arranged on the first reinforcement part, the structure of the first reinforcement part can be reinforced to further avoid large deformation of the area of ​​the first reinforcement part, thereby reducing the deformation amplitude of the entire valve body, reducing the problem of fatigue cracking of the valve body, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a battery according to an embodiment of the present utility model.

[0024] Figure 2 It is a schematic diagram of an explosion-proof valve according to an embodiment of the utility model.

[0025] Figure 3 It is a schematic diagram of an explosion-proof valve according to another embodiment of the utility model.

[0026] Figure 4 It is a schematic diagram of an explosion-proof valve according to another embodiment of the utility model.

[0027] Figure 5 It is a schematic diagram of an explosion-proof valve according to another embodiment of the utility model.

[0028] Figure 6 It is a horizontal cross-sectional view of an explosion-proof valve according to an embodiment of the utility model.

[0029] Figure 7 It is a schematic diagram of an explosion-proof valve (the second reinforcement part is not shown) of another embodiment of the utility model.

[0030] Figure 8 It is a schematic diagram of an explosion-proof valve according to another embodiment of the utility model.

[0031] Fig. 9It is a schematic diagram of an explosion-proof valve according to another embodiment of the utility model.

[0032] Fig.10 It is a longitudinal sectional view of an explosion-proof valve according to an embodiment of the utility model.

[0033] Fig.11 It is a longitudinal sectional view of an explosion-proof valve according to another embodiment of the utility model.

[0034] Reference numerals:

[0035] 1. explosion-proof valve; 11. valve body; 111. thinning area; 12. notched part; 13. connecting part; 14. reinforcement part; 141. first reinforcement part; 1411. main body; 1412. branch part; 142. second reinforcement part; 15. welding part;

[0036] 2. Battery shell; 21. Cover plate. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0038] Please refer to the following Figures 1 to 11 An explosion-proof valve 1 , a battery and a vehicle according to an embodiment of the utility model are described.

[0039] like Figures 1 to 11 As shown, the explosion-proof valve 1 according to the embodiment of the utility model comprises: a valve body 11 and a reinforcement portion 14. A thinning area 111 is provided on the valve body 11, and the reinforcement portion 14 comprises a first reinforcement portion 141 and a second reinforcement portion 142, wherein the first reinforcement portion 141 is provided on the thinning area 111, and the second reinforcement portion 142 is provided on the first reinforcement portion 141, and both the first reinforcement portion 141 and the second reinforcement portion 142 protrude along the thickness direction of the thinning area 111.

[0040] According to the explosion-proof valve 1 of the embodiment of the utility model, when the pressure on the explosion-proof valve 1 changes greatly, since the first reinforcement part 141 is arranged on the thinning area 111, the structure of the thinning area 111 can be reinforced by the first reinforcement part 141 to avoid the thinning area 111 from undergoing a large deformation. Since the second reinforcement part 142 is arranged on the first reinforcement part 141, the structure of the first reinforcement part 141 can be reinforced to further avoid the area of ​​the first reinforcement part 141 from undergoing a large deformation.

[0041] Therefore, the explosion-proof valve 1 of the embodiment of the utility model can improve the overall rigidity and strength of the valve body 11 by providing the first reinforcement part 141 and the second reinforcement part 142, so as to reduce the deformation amplitude of the valve body 11, reduce the problem of fatigue cracking of the valve body 11, and prolong the service life.

[0042] It can be understood that the pressure on the explosion-proof valve 1 is the internal pressure of the battery. The internal pressure of the battery is the pressure formed by the gas generated during the charging and discharging process. When the internal pressure of the battery reaches a certain threshold, the explosion-proof valve opens.

[0043] Specifically, the explosion-proof valve 1 further includes a notch 12 and a connection 13, which are arranged around the boundary line of the thinned area 111 and connected end to end. It should be noted that the thickness of the notch 12 is greater than the thickness of the connection 13, so that when the internal pressure or temperature of the battery reaches a certain threshold, the valve body 11 can be broken along the position of the notch 12, and the connection 13 can ensure that when the explosion-proof valve 1 is opened, the valve body 11 is connected to the connection 13, so as to improve the safety of the pressure relief of the explosion-proof valve 1.

[0044] For example, the outer peripheral contour surrounded by the notched portion 12 and the connecting portion 13 is in the shape of a racetrack.

[0045] Alternatively, if Fig.11 As shown, the first reinforcement portion 141 and the second reinforcement portion 142 protrude toward the same side in the thickness direction of the valve body 11. The side of the valve body 11 adjacent to the battery cell is defined as the inner side of the valve body 11, and the side of the valve body 11 away from the battery cell is defined as the outer side of the valve body 11. In other words, the first reinforcement portion 141 and the second reinforcement portion 142 can protrude toward the inner side of the valve body 11 at the same time, and can also protrude toward the outer side of the valve body 11 at the same time.

[0046] For example, when the installation space outside the battery is limited, the first reinforcement portion 141 and the second reinforcement portion 142 may be simultaneously protruded toward the inside of the valve body 11 to reduce the occupation of the installation space outside the battery by the reinforcement portion 14 .

[0047] For another example, when the installation space inside the battery is limited, the first reinforcement portion 141 and the second reinforcement portion 142 may be simultaneously protruded toward the outside of the valve body 11 to reduce the occupation of the installation space inside the battery by the reinforcement portion 14 .

[0048] In other examples, such as Fig.10As shown, one of the first reinforcement portion 141 and the second reinforcement portion 142 protrudes toward one side in the thickness direction of the valve body 11, and the other of the first reinforcement portion 141 and the second reinforcement portion 142 protrudes toward the other side in the thickness direction of the valve body 11. In other words, one of the first reinforcement portion 141 and the second reinforcement portion 142 protrudes toward the inside of the valve body 11, and the other protrudes toward the outside of the valve body 11, thereby making the overall thickness of the explosion-proof valve 1 thinner, that is, the explosion-proof valve 1 has a more compact structure, thereby reducing the installation space inside the battery and the external installation space occupied at the same time.

[0049] Alternatively, if Figures 2 to 9 As shown, the first reinforcement portion 141 is arranged in the middle of the thinning area 111, and the second reinforcement portion 142 is arranged in the middle of the first reinforcement portion 141, so as to further reduce the deformation amplitude of the valve body 11 when the internal pressure of the battery changes, and improve the durability of the explosion-proof valve 1.

[0050] In some embodiments, Figure 2 As shown, the outer contour of at least one of the first reinforcement portion 141 and the second reinforcement portion 142 is in an "X" shape. For example, only the outer contour of the first reinforcement portion 141 is in an "X" shape. For another example, only the outer contour of the second reinforcement portion 142 is in an "X" shape. For another example, the outer contours of the first reinforcement portion 141 and the second reinforcement portion 142 are both in an "X" shape. The inventors of the present application have found through experimental research that when the first reinforcement portion 141 and the second reinforcement portion 142 are set in an "X" shape, it is possible to further prevent the explosion-proof valve 1 from being deformed to a large extent when the internal pressure of the battery changes, thereby reducing the probability of fatigue cracking of the valve body 11.

[0051] Optionally, the angle of the "X" shape is A, where 15°≤A≤120°. Specifically, the explosion-proof valve 1 has an X-axis and a Y-axis, the direction of the X-axis, the direction of the Y-axis and the thickness direction of the thinning area are perpendicular to each other, and the X-axis and the Y-axis both pass through the center of the valve body. The angle of the "X" shape toward the X-axis or the Y-axis can be A. For example, Figure 2 As shown, the X-axis of the explosion-proof valve 1 is consistent with the length direction of the explosion-proof valve 1, and the Y-axis of the explosion-proof valve 1 is consistent with the width direction of the explosion-proof valve 1. That is, the "X"-shaped first reinforcement portion 141 (second reinforcement portion 142) can have an angle A along the length direction of the explosion-proof valve 1 or an angle A along the width direction of the explosion-proof valve 1.

[0052] Taking the outer peripheral contour of the first reinforcement part 141 as an "X" shape as an example, the angle A can be 15°, 30°, 60°, 90° or 120°. The explosion-proof valve 1 of the embodiment of the utility model sets the first reinforcement part 141 as the above structure, so that the deformation amplitude of the valve body 11 when the internal pressure of the battery changes is small, and the reinforcement effect of the thinning area 111 is better. When the angle A is less than 15° or greater than 120°, the deformation amplitude of the valve body 11 when the internal pressure of the battery changes is large, and the problem of fatigue rupture of the valve body 11 along the notched portion is prone to occur.

[0053] Optionally, at least one of the first reinforcement portion 141 and the second reinforcement portion 142 is symmetrical about the X-axis or the Y-axis, or at least one of the first reinforcement portion 141 and the second reinforcement portion 142 is symmetrical about the center of the valve body 11. In other words, the first reinforcement portion 141 forms an axisymmetric pattern about the X-axis or the Y-axis, or a pattern symmetrical about the center of the valve body 11; similarly, the second reinforcement portion 142 forms an axisymmetric pattern about the X-axis or the Y-axis, or a pattern symmetrical about the center of the valve body 11. In this way, the uniformity of the explosion-proof valve 1 when subjected to force can be improved, and the effect of anti-fatigue cracking is better.

[0054] In one example, there are multiple first reinforcement parts 141, and the multiple first reinforcement parts 141 are sequentially connected along the direction of the X axis or the direction of the Y axis. The "X"-shaped first reinforcement part 141 has an included angle of 90°, and the multiple "X"-shaped first reinforcement parts 141 are sequentially connected along the X axis, thereby further strengthening the thinning area 111 of the valve body 11 and having a better effect of anti-fatigue cracking.

[0055] In another example, there are multiple second reinforcement parts 142, and the multiple second reinforcement parts 142 are sequentially connected along the direction of the X axis or the direction of the Y axis. The included angle of the "X"-shaped second reinforcement part 142 is 90°, and the multiple "X"-shaped second reinforcement parts 142 are sequentially connected along the X axis, thereby further strengthening the thinning area 111 of the valve body 11 and having a better effect of anti-fatigue cracking.

[0056] In a specific example, if Figure 8 As shown, the included angle of the "X"-shaped first reinforcement part 141 is 90°, and multiple "X"-shaped first reinforcement parts 141 are sequentially connected along the X axis. The outer peripheral contour of the second reinforcement part 142 is circular, and there are multiple second reinforcement parts 142, and the multiple second reinforcement parts 142 are sequentially arranged at the center position of each first reinforcement part 141, thereby further strengthening the thinning area 111 of the valve body 11 and having a better effect of anti-fatigue cracking.

[0057] In other examples, such as Figure 5 As shown, the second reinforcing portion 142 may also be in a strip shape, and the second reinforcing portion 142 extends along the direction of the X-axis.

[0058] Alternatively, if Figure 2 As shown, at least one of the first reinforcement part 141 and the second reinforcement part 142 includes a main body 1411 and a plurality of branch parts 1412; the plurality of branch parts 1412 are connected to the main body 1411 and are arranged at intervals along the circumference of the main body 1411; each branch part 1412 extends toward the boundary line of the thinning area 111 and has a spacing. It can be understood that the first reinforcement part 141 and the second reinforcement part 142 will not contact the notched part 12 and the connecting part 13, thereby avoiding the problem of fatigue cracking at the connection position of the reinforcement part 14 with the notched part 12 and the connecting part 13, and further improving the durability of the explosion-proof valve 1.

[0059] For example, Figure 2 As shown, the distance between the branch portion 1412 and the boundary line of the thinning area 111 is B, and the distances B between the branch portions 1412 and the boundary lines of the thinning area 111 are equal, thereby further improving the uniformity of the explosion-proof valve 1 when subjected to force, which is beneficial to improving the anti-fatigue cracking effect of the explosion-proof valve 1. Among them, the thickness of the first reinforcement portion 141 and the thickness of the second reinforcement portion 142 are consistent with the thickness of the positions of other regions of the thinning area 111, that is, the first reinforcement portion 141 and the second reinforcement portion 142 are processed by stamping.

[0060] Alternatively, if Fig.10 and Fig.11 As shown, the protruding height of the first reinforcement portion 141 is H1, and the protruding height of the second reinforcement portion 142 is H2, wherein H2≤H1. It is understandable that the protruding height of the first reinforcement portion 141 is higher than the protruding height of the second reinforcement portion 142. For example, 0.05mm≤H2≤H1≤2mm. The inventors of the present application have found through experimental research that when the first reinforcement portion 141 and the second reinforcement are designed with the above parameters, a large deformation of the first reinforcement portion 141 and the thinning area 111 can be avoided, thereby reducing the problem of fatigue cracking of the valve body 11 and increasing the service life.

[0061] In some embodiments, Figure 6 As shown, the projection area of ​​the first reinforcement portion 141 on the projection plane orthogonal to the thickness direction of the valve body 11 is S1, that is, the positive projection area of ​​the first reinforcement portion 141 on the thinning area 11 is S1. The projection area of ​​the thinning area 111 on the projection plane orthogonal to the thickness direction of the valve body 11 is S2, that is, the area of ​​the thinning area 111 on the valve body is S2; wherein 0.1≤S1 / (S2-S1)≤0.7.

[0062] It can be understood that "S2-S1" is the projection area of ​​the thinning area 111 of the valve body 11 after removing the first reinforcement part 141. The inventors of the present application have found through experimental research that when the first reinforcement part 141 is designed with the above parameters, it is possible to avoid a large deformation of the first reinforcement part 141 and the thinning area 111, thereby reducing the problem of fatigue cracking of the valve body 11 and increasing the service life.

[0063] Alternatively, if Figures 2 to 9 As shown, the explosion-proof valve 1 further includes a welding portion 15, which surrounds the outer periphery of the notched portion 12 and the connecting portion 13, and the thickness of the welding portion 15 is greater than the thickness of the valve body 11. It can be understood that the welding portion 15 is connected to the cover plate 21 of the battery shell 2, and since the thickness of the welding portion 15 is relatively thick, the reliability of the installation of the explosion-proof valve 1 and the battery shell 2 can be improved.

[0064] In another embodiment, the reinforcement portion 14 may be a multi-layer nested structure, that is, a second reinforcement portion 142 is provided on the first reinforcement portion 141, and a third reinforcement portion (not shown) is provided on the second reinforcement portion 142. The present application does not specifically limit the specific number of nested layers of the reinforcement portion 14.

[0065] Optionally, the number of the second reinforcing portion 142 may be one or more, and the outer peripheral contour of the second reinforcing portion 142 may be a circular, cross-shaped, polygonal or other structure, which is not specifically limited in the present application.

[0066] like Figure 1 As shown, a battery according to another embodiment of the present invention comprises a battery cell, a battery shell 2 and an explosion-proof valve 1. The battery cell is arranged in the battery shell 2, and the explosion-proof valve 1 is the explosion-proof valve 1 of the present invention, and the explosion-proof valve 1 is arranged on the battery shell 2.

[0067] According to the battery of the embodiment of the utility model, when the pressure on the explosion-proof valve 1 changes greatly, since the first reinforcement part 141 is arranged on the thinning area 111, the structure of the thinning area 111 can be strengthened by the first reinforcement part 141 to avoid a large deformation of the thinning area 111, and since the second reinforcement part 142 is arranged on the first reinforcement part 141, the structure of the first reinforcement part 141 can be strengthened to further avoid a large deformation of the area of ​​the first reinforcement part 141. Therefore, the explosion-proof valve 1 of the battery of the embodiment of the utility model can improve the rigidity and strength of the valve body 11 as a whole by arranging the first reinforcement part 141 and the second reinforcement part 142, so as to reduce the deformation amplitude of the valve body 11, reduce the problem of fatigue cracking of the valve body 11, and prolong the service life.

[0068] A vehicle according to another embodiment of the present invention comprises the battery according to the embodiment of the present invention. The technical advantages of the vehicle according to the embodiment of the present invention are the same as those of the battery or explosion-proof valve 1 according to the above embodiment, and will not be described in detail here.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An explosion-proof valve (1), characterized in that: include: A valve body (11), wherein a thinning area (111) is provided on the valve body (11); A reinforcing portion (14), the reinforcing portion (14) comprising a first reinforcing portion (141) and a second reinforcing portion (142), the first reinforcing portion (141) being arranged on the thinning area (111), the second reinforcing portion (142) being arranged on the first reinforcing portion (141), the first reinforcing portion (141) and the second reinforcing portion (142) both protruding along the thickness direction of the thinning area (111).

2. The explosion-proof valve (1) according to claim 1, characterized in that: The outer peripheral contour of at least one of the first reinforcement portion (141) and the second reinforcement portion (142) is in an "X" shape.

3. The explosion-proof valve (1) according to claim 2, characterized in that: The included angle of the "X" shape is A, where 15°≤A≤120°.

4. The explosion-proof valve (1) according to claim 1, characterized in that: The explosion-proof valve (1) has an X-axis and a Y-axis, the direction of the X-axis, the direction of the Y-axis and the thickness direction of the thinned area (111) are perpendicular to each other, and the X-axis and the Y-axis both pass through the center of the valve body (11); at least one of the first reinforcement part (141) and the second reinforcement part (142) is symmetrical about the X-axis or the Y-axis, or at least one of the first reinforcement part (141) and the second reinforcement part (142) is symmetrical about the center of the valve body (11).

5. The explosion-proof valve (1) according to claim 4, characterized in that: There are a plurality of first reinforcing parts (141), and the plurality of first reinforcing parts (141) are sequentially connected along the direction of the X-axis or the direction of the Y-axis; And / or, there are multiple second reinforcing parts (142), and the multiple second reinforcing parts (142) are arranged in sequence along the direction of the X-axis or the direction of the Y-axis.

6. The explosion-proof valve (1) according to claim 1, characterized in that: At least one of the first reinforcing portion (141) and the second reinforcing portion (142) includes a main body portion (1411) and a plurality of branch portions (1412); the plurality of branch portions (1412) are all connected to the main body portion (1411) and are arranged at intervals along the circumference of the main body portion (1411); each of the branch portions (1412) extends toward a boundary line of the thinning zone (111) and has a distance from the boundary line of the thinning zone (111).

7. The explosion-proof valve (1) according to claim 1, characterized in that: The first reinforcement portion (141) and the second reinforcement portion (142) protrude toward the same side in the thickness direction of the valve body (11); Alternatively, one of the first reinforcement portion (141) and the second reinforcement portion (142) protrudes toward one side in the thickness direction of the valve body (11), and the other of the first reinforcement portion (141) and the second reinforcement portion (142) protrudes toward the other side in the thickness direction of the valve body (11).

8. The explosion-proof valve (1) according to claim 1, characterized in that: The protruding height of the first reinforcing portion (141) is H1, and the protruding height of the second reinforcing portion (142) is H2; wherein H2≤H1.

9. The explosion-proof valve (1) according to claim 8, characterized in that: 0.05mm≤H2≤H1≤2mm.

10. The explosion-proof valve (1) according to claim 2, characterized in that: The orthographic projection area of ​​the first reinforcement portion (141) on the thinned area (111) is S1, and the area of ​​the thinned area (111) on the valve body (11) is S2; wherein 0.1≤S1 / (S2-S1)≤0.

7.

11. A battery, characterized in that: include: Battery cells; A battery shell (2), wherein the battery cell is arranged in the battery shell (2); and, The explosion-proof valve (1) according to any one of claims 1 to 10, wherein the explosion-proof valve (1) is arranged on the battery shell (2).

12. A vehicle, characterized in that: Comprising the battery of claim 11.

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