Explosion-proof valve, battery and vehicle

Abstract

The utility model discloses an explosion-proof valve, battery and vehicle, the explosion-proof valve comprises an explosion-proof valve main body, the explosion-proof valve main body is provided with the annular reinforcing rib protruding in the Z-axis direction, the outer contour and the inner contour of the reinforcing rib are both polygons, the structure of the explosion-proof valve main body is reinforced by adopting the annular reinforcing rib, and the explosion-proof valve main body is not damaged. According to the anti-explosion valve, the rigidity of the anti-explosion valve body can be effectively improved, large-amplitude deformation, caused by pressure changes, of the anti-explosion valve is reduced, and the anti-fatigue cracking capacity can be effectively improved through the reinforcing rib structure.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, 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 single cells is gradually increasing. In order to ensure the safety of the battery cells in the event of thermal runaway, the design size of the corresponding explosion-proof valve is also getting larger and larger.

[0003] At present, in the design of explosion-proof valves, especially those with relatively large sizes, in order to ensure the durability of the explosion-proof valve during use, a stamping scoreline is generally designed in the valve body area in the middle of the explosion-proof valve. This setting can improve the rigidity of the explosion-proof valve, but under some working conditions, the scoreline fatigue cracking may occur, causing the explosion-proof valve to leak.

[0004] Therefore, it is necessary to design an explosion-proof valve, a battery and a vehicle to ensure rigidity while reducing the problem of fatigue cracking of the explosion-proof valve. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and to provide an explosion-proof valve, a battery and a vehicle, wherein the explosion-proof valve can effectively reduce the problem of fatigue cracking of the explosion-proof valve and thus avoid the problem of liquid leakage.

[0006] According to a first aspect of the utility model, there is provided an explosion-proof valve, comprising an explosion-proof valve body, on which an annular reinforcing rib protruding in the Z-axis direction is formed, wherein both the outer contour and the inner contour of the reinforcing rib are polygonal.

[0007] In one embodiment, the outer contour of the reinforcing rib is an N-gon, and the inner contour of the reinforcing rib is an M-gon, wherein N is greater than or equal to M, M is greater than or equal to three, and both N and M are natural numbers.

[0008] In one embodiment, NM is 1 to 3.

[0009] In one embodiment, at least part of the outer contour lines of two adjacent reinforcing ribs are connected by an outer convex arc.

[0010] In one embodiment, in the Z-axis direction, the reinforcing rib protrudes 0.2 to 1 mm relative to the explosion-proof valve body.

[0011] In one embodiment, a groove connected end to end is provided on the explosion-proof valve body, and the groove is located on the outside of the reinforcing rib in the XY plane. In the extension direction of the groove, the groove includes a first section and a second section connected to the first section, wherein the groove depth of the second section is less than the groove depth of the first section, and the XY plane is determined by the X-axis and the Y-axis, and the X-axis, the Y-axis and the Z-axis form a rectangular coordinate system.

[0012] In one embodiment, the length of the second section in the extending direction of the groove is one eighth to one third of the entire length of the groove.

[0013] In one embodiment, the reinforcing rib is symmetrical about the X-axis, or / and the reinforcing rib is symmetrical about the Y-axis.

[0014] According to a second aspect of the utility model, a battery is provided, comprising the above-mentioned explosion-proof valve.

[0015] According to a third aspect of the utility model, a vehicle is provided, comprising the above-mentioned battery.

[0016] The above technical solution has the following beneficial effects: the structural reinforcement of the explosion-proof valve body by annular protrusions can effectively improve the rigidity of the explosion-proof valve body and reduce the significant deformation of the explosion-proof valve caused by pressure changes. This design can avoid stamping and engraving lines on the explosion-proof valve body, thereby avoiding the problem of fatigue cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0018] Figure 1 A three-dimensional diagram of an explosion-proof valve according to an embodiment of the utility model is shown;

[0019] Figure 2 A front view of an explosion-proof valve according to an embodiment of the utility model is shown;

[0020] Figure 3 For Figure 2 AA section view;

[0021] Figure 4 For Figure 2 BB cross-section diagram;

[0022] Figure 5 For Figure 3 A magnified image of point A;

[0023] Figure 6 For Figure 3 Enlarged view of point B.

[0024] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0025] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0026] An embodiment of the present utility model provides an explosion-proof valve. Figures 1 to 6 As shown, the explosion-proof valve includes an explosion-proof valve body 1. The explosion-proof valve body 1 may be a plate-shaped structure. It should be noted that, according to actual needs, the explosion-proof valve body 1 may be Figure 1 The runway shape shown may also be circular or other shapes. A reinforcing rib 2 is formed on the explosion-proof valve body 1. In the Z-axis direction, the reinforcing rib 2 protrudes relative to other parts of the explosion-proof valve body 1 to play a reinforcing role. For example, the reinforcing rib 2 is formed on the explosion-proof valve body 1 by stamping. According to the present application, the reinforcing rib 2 is a ring-shaped protrusion in the Z-axis direction provided on the explosion-proof valve body 1, the outer contour 3 of the reinforcing rib 2 is a polygon, and the inner contour 4 is also a polygon. The use of annular raised reinforcing ribs 2 to structurally reinforce the explosion-proof valve body 1 can effectively improve the rigidity of the explosion-proof valve body 1 and reduce the large deformation of the explosion-proof valve caused by pressure changes. By providing the reinforcing rib 2, it is possible to avoid designing stamping lines on the explosion-proof valve body 1, which in turn helps to improve the ability of the explosion-proof valve to resist fatigue cracking.

[0027] In one embodiment, the outer contour 3 of the reinforcing rib 2 is an N-gon, and the inner contour 4 of the reinforcing rib 2 is an M-gon, wherein N is greater than or equal to the value of M. It is understandable that the values ​​of N and M are both one of the natural numbers greater than or equal to three. Through the above arrangement, the distribution of the reinforcing rib 2 on the explosion-proof valve body 1 can be better designed. In particular, when the values ​​of N and M are relatively large, the area occupied by the reinforcing rib 2 on the explosion-proof valve body 1 is better adjusted, which is conducive to flexible design and meeting actual needs. Preferably, NM is 1 to 3, that is, N is 1 to 3 greater than M, for example, N is one or two or three greater than M. In the present application, an embodiment is given in which the outer contour 3 of the reinforcing rib 2 is an octagon and the inner contour 4 of the reinforcing rib 2 is a hexagon. The structure of the reinforcing rib 2 of this structure is relatively easy to adjust the distribution size on the explosion-proof valve body 1, and a variety of occupied area adjustments can be met by adjusting the length of each side and the angle of the adjacent sides. In particular, this arrangement is easy to implement in terms of process, reducing the requirements for processing equipment.

[0028] In one embodiment, the outer contour lines 3 of two adjacent reinforcing ribs 2 are connected by an outer convex arc 5. In the embodiment in the figure, the outer convex arc 5 is shown to be located at the four corners of the outer contour 3 of the octagon. This setting can make the raised reinforcing ribs 2 continue to extend to the outer plane, which helps to increase the distribution area of ​​the reinforcing ribs 2 on the explosion-proof valve body 1, thereby improving the overall rigidity of the explosion-proof valve body 1. In addition, this setting can also effectively prevent stress concentration and ensure that the overall force of the explosion-proof valve body 1 is more uniform.

[0029] In the Z-axis direction, the reinforcing rib 2 protrudes 0.2 to 1 mm relative to the explosion-proof valve body 1. That is to say, if the explosion-proof valve body 1 is taken as the reference 0, the height of the reinforcing rib 2 is 0.2 to 1 mm, for example, 0.2 mm or 0.5 mm or 1 mm. Figure 4 Indicated by H. This arrangement is beneficial to ensuring the reinforcing effect of the reinforcing rib 2 and can effectively prevent the reinforcing rib 2 from interfering with the installation of other components.

[0030] A welding ring 9 is connected to the outer peripheral wall of the explosion-proof valve body 1. The welding ring 9 plays a connecting role and is used to connect the explosion-proof valve to other components. It can be understood that in order to ensure strength and rigidity, the welding ring 9 is thicker than the explosion-proof valve body 1.

[0031] A groove 6 connected end to end is provided on the explosion-proof valve body 1. For example, the contour line of the groove 6 on the explosion-proof valve body 1 matches the shape of the explosion-proof valve body 1. For example, the explosion-proof valve body 1 is in the shape of a runway, and the contour line of the groove 6 is also in the shape of a runway. The groove 6 is located outside the reinforcing rib 2 in the XY plane. In the extension direction of the groove 6, the groove 6 includes a first section 7 and a second section 8 connected to the first section 7. The groove depth of the second section 8 is less than the groove depth of the first section 7, that is, the residual thickness at the second section 8 is greater than the residual thickness at the first section 7. The groove 6 can be provided on the explosion-proof valve body 1 by a notching process. The existence of the groove 6 causes a weak area to exist on the explosion-proof valve body 1. The residual thickness at the first section 7 corresponds to the valve opening threshold designed for the explosion-proof valve. After the explosion-proof valve is opened, the second section 8 can keep the explosion-proof valve body 1 from opening and continue to be connected to the welding ring 9, thereby avoiding a system short circuit caused by the explosion-proof valve body 1 flying out. Preferably, the length of the second section 8 in the extension direction of the groove 6 is one eighth to one third of the length of the entire groove 6. Figure 1 In the given embodiment, the groove 6 matches the explosion-proof valve body 1 to be constructed in a racetrack shape, and the second section 8 is located at a straight section of the racetrack. Of course, it can be understood that in order to reduce processing costs, the second section 8 may not be scored, that is, the second section 8 maintains the original state of the explosion-proof valve body 1.

[0032] Preferably, the reinforcing ribs 2 of the present application are symmetrically distributed about the X-axis or / and the Y-axis. The figure shows an embodiment in which the reinforcing ribs 2 are symmetrically distributed about the X-axis and the Y-axis. This arrangement is conducive to ensuring the uniformity of the overall strength and rigidity of the explosion-proof valve. The reinforcing ribs 2 can protrude to either side of the explosion-proof valve body 1, for example, Figure 3 The reinforcement ribs are given in two directions Figure 3 In the embodiment of the right side protrusion, it can be understood that the reinforcing rib 2 is Figure 3 The middle portion may be configured to protrude to the left.

[0033] The present application also relates to a battery. The battery includes the above-mentioned explosion-proof valve. The battery is a secondary battery, that is, a rechargeable battery. Further, the present application also relates to a vehicle. The vehicle includes the above-mentioned battery.

[0034] In the present application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0035] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the protection scope of the present invention.

Claims

1. An explosion-proof valve, characterized in that: The explosion-proof valve comprises an explosion-proof valve body, on which a ring-shaped reinforcing rib protruding in the Z-axis direction is formed, and the outer contour and the inner contour of the reinforcing rib are both polygonal.

2. The explosion-proof valve according to claim 1, characterized in that: The outer contour of the reinforcing rib is an N-gon, and the inner contour of the reinforcing rib is an M-gon, wherein N is greater than or equal to M, M is greater than or equal to three, and both N and M are natural numbers.

3. The explosion-proof valve according to claim 2, characterized in that: NM is 1 to 3.

4. The explosion-proof valve according to claim 1, characterized in that: The outer contour lines of at least two adjacent reinforcing ribs are connected by an outer convex arc.

5. The explosion-proof valve according to claim 1, characterized in that: In the Z-axis direction, the reinforcing rib protrudes 0.2 to 1 mm relative to the explosion-proof valve body.

6. The explosion-proof valve according to any one of claims 1 to 5, characterized in that: A groove connected end to end is provided on the explosion-proof valve body, and the groove is located on the outside of the reinforcing rib in the XY plane. In the extension direction of the groove, the groove includes a first section and a second section connected to the first section, wherein the groove depth of the second section is less than the groove depth of the first section, and the XY plane is determined by the X-axis and the Y-axis, and the X-axis, the Y-axis and the Z-axis form a rectangular coordinate system.

7. The explosion-proof valve according to claim 6, characterized in that: The length of the second section in the extending direction of the groove is one eighth to one third of the entire length of the groove.

8. The explosion-proof valve according to any one of claims 1 to 5, characterized in that: The reinforcing ribs are symmetrical about the X-axis, or / and the reinforcing ribs are symmetrical about the Y-axis.

9. A battery, characterized in that: Comprising an explosion-proof valve according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising a battery according to claim 9.

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