Explosion-proof valve with reinforced nicks

Abstract

The utility model discloses an explosion-proof valve with reinforcing nicks, which comprises an explosion-proof valve body, at least one first reinforcing part is arranged on the explosion-proof valve body, and the first reinforcing part comprises at least three first linear nicks; the first reinforcing part is located on the upper surface and / or the lower surface of the anti-explosion valve body. At least one blasting nick is formed in the portion, on the periphery of the first reinforcing part, of the anti-explosion valve body, and a boss is arranged on the portion, on the periphery of the blasting nick, of the anti-explosion valve body. The explosion-proof valve body comprises the boss on the periphery and the thinning area in the middle, the first reinforcing part is additionally arranged in the thinning area to play a reinforcing role, and when the explosion-proof valve body is welded with a top cover piece of a battery, or when the explosion-proof valve breathes, and when the explosion-proof valve is subjected to helium detection, after the edge of the explosion-proof valve body is stressed, stress is concentrated in the thinning area, and the explosion-proof valve is not damaged. According to the utility model, the first reinforcing part is additionally arranged in the thinning area, so that a stress buffering effect is achieved, the influence on surrounding blasting nicks is reduced, and the blasting data is more stable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery technical field, concretely relates to a kind of anti-explosion valve with reinforced score. BACKGROUND

[0002] Lithium battery is a kind of by lithium metal or lithium alloy as positive / negative electrode material, using non-aqueous electrolyte solution battery. With the continuous development of battery industry, lithium ion battery is widely used in power battery field with its energy density advantage, and provides power for vehicle operation. Anti-explosion valve plays a vital role in the safety of battery cell. When short circuit, overcharge, overheating and other problems occur in battery cell, anti-explosion valve opens in time by sensing the change of internal air pressure of battery cell, and exhausts to avoid the risk of battery cell explosion or fire. However, the existing anti-explosion valve often does not open along the score when it explodes, which reduces safety, so it is very important to obtain an anti-explosion valve with reinforced score to overcome the above defects. SUMMARY

[0003] To solve the above at least one technical problem, the utility model provides an anti-explosion valve with reinforced score, which comprises an anti-explosion valve body, at least one first reinforcing part is formed on the anti-explosion valve body, the first reinforcing part comprises at least three first straight line scores, and at least three first straight line scores are located on the upper surface and / or lower surface of the anti-explosion valve body. At least one explosion score is formed on the anti-explosion valve body outside the first reinforcing part, and a boss is arranged on the anti-explosion valve body outside the explosion score.

[0004] At least three first straight line scores are distributed along a plane axis on the anti-explosion valve body, at least three first straight line scores are arranged in parallel and have equal or unequal lengths, and the spacing between each first straight line score is equal or unequal.

[0005] As one of the above preferred modes, the first reinforcing part further comprises at least one second straight line score, and the second straight line score connects at least three first straight line scores.

[0006] Preferably, three first straight line scores form a "three" shaped structure for distribution of scores.

[0007] One second straight line score connects three first straight line scores to form a "king" shaped structure for distribution of scores.

[0008] As one of the above preferred modes, the first straight line score is parallel to the symmetry axis arranged along the length direction on the anti-explosion valve body. The second straight line score is parallel to the symmetry axis arranged along the width direction on the anti-explosion valve body.

[0009] Preferably, the first straight line notch in the middle is located on a symmetrical axis arranged along the length direction of the explosion-proof valve body, and the other two first straight line notches are symmetrically arranged on both sides of the symmetrical axis, and the second straight line notch is located on a symmetrical axis arranged along the width direction of the explosion-proof valve body.

[0010] As one of the preferred modes, the explosion notch is a ring-shaped notch arranged around the first reinforcing part, and the first reinforcing part and the explosion notch are located on one side surface of the explosion-proof valve body, or the first reinforcing part and the explosion notch are located on the upper surface or the lower surface of the explosion-proof valve body, respectively.

[0011] Preferably, the first reinforcing part and the explosion notch are provided with two, and are arranged on the upper surface of the explosion-proof valve body, that is, the outer side surface.

[0012] As one of the preferred modes, the explosion notch comprises a first straight line segment, a first arc line segment, a second straight line segment and a second arc line segment connected in sequence in a ring shape, and the depth of the first straight line segment and / or the depth of the second straight line segment is different from the depth of the first arc line segment and / or the depth of the second arc line segment. The depths of the first arc line segment and the second arc line segment are consistent; the first straight line segment is provided with an upward protrusion on the bottom surface upward, so that the first straight line segment is at least partially less deep than the first arc line segment and the second arc line segment.

[0013] As one of the preferred modes, the length of the first straight line notch is 12 mm, the length of the second straight line notch is 8.83 mm, and the distance between the second straight line segment and the closest first straight line notch is 2-3.13 mm.

[0014] The thickness of the boss on the outer periphery of the explosion-proof valve body is 0.5 mm, the thickness of the thinning area is 0.3 mm, the residual thickness of the second straight line segment is 0.12±0.02 mm, and the residual thickness of the first straight line segment is 0.27 mm.

[0015] Compared with the prior art, the explosion-proof valve body of the utility model has the advantages that the utility model is simple in structure, the explosion-proof valve body is provided with a boss on the outer periphery and a thinning area in the middle, the first reinforcing part is arranged in the thinning area, and the first reinforcing part plays a reinforcing role. When the explosion-proof valve body and the top cover sheet of the battery are welded, or when the explosion-proof valve breathes and is helium detected, the stress is concentrated on the thinning area after the edge of the explosion-proof valve body is stressed. The utility model increases the first reinforcing part in the thinning area, plays a stress buffering role, reduces the influence on the surrounding explosion notch, and makes the explosion data more stable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of one embodiment of the utility model;

[0017] Figure 2 It is aFigure 1 a side cross-sectional view of the embodiment of the present application;

[0018] Figure 3 a front view of the second embodiment of the present application;

[0019] Figure 4 a side cross-sectional view of the embodiment of the present application; Figure 2 a side cross-sectional view of the embodiment of the present application;

[0020] Figure 5 a side cross-sectional view of the embodiment of the present application; Figure 2 a side cross-sectional view of the embodiment of the present application;

[0021] Reference signs:

[0022] 1 explosion-proof valve body; 101 first reinforcing portion; 1011 first straight line notch; 1012 second straight line notch;

[0023] 102 explosion notch; 1021 first straight line segment; 10211 upward protrusion; 1022 first arc line segment; 1023 second straight line segment; 1024 second arc line segment;

[0024] 103 boss;

[0025] 104 thinning area. DETAILED DESCRIPTION

[0026] In order to make the person skilled in the art better understand the present application, so as to make the scope of the present application more clearly limited, the present application is described in detail below according to some specific embodiments of the present application. It should be noted that the following is only some specific embodiments of the present application concept, and only a part of the embodiments of the present application, and the specific and direct description of the related structure is only for the convenience of understanding the present application, and each specific feature does not of course, directly limit the scope of the present application.

[0027] Referring to the drawings, the present application adopts the following technical scheme, an explosion-proof valve with reinforcing notches, comprising an explosion-proof valve body 1, at least one first reinforcing portion 101 is formed on the explosion-proof valve body 1, the first reinforcing portion 101 comprises at least three first straight line notches 1011; at least three first reinforcing portions 101 are located on the upper surface and / or the lower surface of the explosion-proof valve body 1. At least one explosion notch 102 is formed on the explosion-proof valve body 1 outside the first reinforcing portion 101, and a boss 103 is arranged on the explosion-proof valve body 1 outside the explosion notch 102.

[0028] The at least three first straight line notches 1011 are spaced apart along a plane axis of the explosion-proof valve body 1, the at least three first straight line notches 1011 are arranged in parallel with each other and have equal or unequal lengths, and the spacing between each first straight line notch 1011 is equal or unequal.

[0029] As one of the above-mentioned preferred modes, the first reinforcing part 101 further comprises at least one second straight line notch 1012 connecting at least three first straight line notches 1011.

[0030] Embodiment one: three first straight line notches 1011 form a "three" character-shaped notch; Embodiment two: on the basis of embodiment one, one second straight line notch 1012 connects three first straight line notches 1011 so that the first reinforcing part 101 forms a "king" character-shaped notch.

[0031] On the basis of embodiment one and embodiment two, the first straight line notch 1011 is parallel to the symmetry axis of the explosion valve body 1 arranged in the length direction; the second straight line notch 1012 is parallel to the symmetry axis of the explosion valve body 1 arranged in the width direction.

[0032] Preferably, the middle first straight line notch 1011 is located on the symmetry axis of the explosion valve body 1 arranged in the length direction, and the other two first straight line notches 1011 are symmetrically arranged on both sides of the symmetry axis; the second straight line notch 1012 is located on the symmetry axis of the explosion valve body 1 arranged in the width direction.

[0033] The blasting notch 102 is a ring-shaped notch arranged around the first reinforcing part 101, and the first reinforcing part 101 and the blasting notch 102 are located on one side surface of the explosion valve body 1 at the same time, or the first reinforcing part 101 and the blasting notch 102 are located on the upper surface or the lower surface of the explosion valve body 1 respectively.

[0034] Preferably, the first reinforcing part 101 and the blasting notch 102 are provided with two, and are arranged on the upper surface of the explosion valve body 1, i.e. the outer side surface.

[0035] The blasting notch 102 comprises a first straight line segment 1021, a first arc line segment 1022, a second straight line segment 1023 and a second arc line segment 1024 connected in sequence in a ring shape, the depth of at least part of the first straight line segment 1021 and / or the depth of at least part of the second straight line segment 1023, and the depth of at least part of the first arc line segment 1022 and / or the depth of at least part of the second arc line segment 1024 are different. The depths of the first arc line segment 1022 and the second arc line segment 1024 are consistent; the first straight line segment 1021 is provided with an upward protrusion 10211 with the bottom surface upward, so that the at least partial depth of the first straight line segment 1021 is smaller than the first arc line segment 1022 and the second arc line segment 1024. The length of the upward protrusion 10211 is 8 mm.

[0036] The length of the first straight line notch 1011 is 12 mm, and the length of the second straight line notch 1012 is 8.83 mm. The thickness of the boss 103 on the outer periphery of the explosion-proof valve body 1 is 0.5 mm, the thickness of the thinning area 104 is 0.3 mm, and the residual thickness of the second straight line segment 1023 is 0.12±0.02 mm. The residual thickness of the first straight line segment 1021 is 0.27 mm.

[0037] The distance between the second straight line segment 1023 and the closest first straight line notch 1011 is 2-3.13 mm.

[0038] Compared with the prior art, the utility model has the advantages that the utility model has simple structure, the boss 103 on the outer periphery and the thinning area 104 in the middle of the explosion-proof valve body 1, the first reinforcing portion 101 is added in the thinning area 104, and the first reinforcing portion 101 plays a reinforcing role. When the explosion-proof valve body 1 and the top cover sheet of the battery are welded, or when the explosion-proof valve breathes and the explosion-proof valve is helium detected, after the edge of the explosion-proof valve body 1 is stressed, stress is concentrated in the thinning area 104. The utility model adds the first reinforcing portion 101 in the thinning area 104, plays a stress buffering role, reduces the influence on the surrounding blasting notches 102, and makes the blasting data more stable.

[0039] Thus, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical scheme after the changes or replacements will fall within the protection scope of the utility model.

Claims

1. A rupture disc having a reinforced score, characterized by: The explosion-proof valve body (1) is provided with an explosion notch and at least one first reinforcing part (101) on the burst part of the explosion-proof valve body (1), and the first reinforcing part (101) comprises at least three first straight notches (1011); the at least three first straight notches (1011) are located on the upper surface and / or the lower surface of the explosion-proof valve body (1).

2. The pressure relief valve with reinforced score of claim 1, wherein: The at least three first straight notches (1011) are spaced apart along a plane axis on the explosion-proof valve body (1), and the at least three first straight notches (1011) are arranged in parallel and have equal or unequal lengths, and the distances between the first straight notches (1011) are equal or unequal.

3. An explosion relief valve with reinforced score line according to claim 1 or 2, characterized in that: The first reinforcing part (101) further comprises at least one second straight notch (1012) connecting the at least three first straight notches (1011).

4. The pressure relief valve with reinforced score line of claim 3, wherein: The middle part of each first straight notch (1011) is connected with the second straight notch (1012).

5. The burst disc with reinforced score of claim 1, wherein: The first straight notch (1011) is parallel to the symmetry axis arranged along the length direction on the explosion-proof valve body (1).

6. The pressure relief valve with reinforced score line of claim 3, wherein: The second straight notch (1012) is parallel to the symmetry axis arranged along the width direction on the explosion-proof valve body (1).

7. The pressure relief valve with reinforced score of claim 1, wherein: At least one explosion notch (102) is arranged on the outer periphery of the explosion-proof valve body (1) of the first reinforcing part (101), the explosion notch (102) is an annular notch arranged around the first reinforcing part (101), and the first reinforcing part (101) and the explosion notch (102) are located on one side surface of the explosion-proof valve body (1) at the same time, or the first reinforcing part (101) and the explosion notch (102) are located on the upper surface or the lower surface of the explosion-proof valve body (1) respectively.

8. The pressure relief valve with reinforced score of claim 7, wherein: The explosion notch (102) comprises a first straight line segment (1021), a first arc line segment (1022), a second straight line segment (1023) and a second arc line segment (1024) connected in sequence in a ring shape, and the depth of at least part of the first straight line segment (1021) and / or the second straight line segment (1023) is different from the depth of at least part of the first arc line segment (1022) and / or the second arc line segment (1024).

9. The pressure relief valve with reinforced score line of claim 8, wherein: The depths of the first arc line segment (1022) and the second arc line segment (1024) are consistent; and / or, An upward protrusion (10211) with an upward bottom surface is arranged on the first straight line segment (1021) to make the at least partial depth of the first straight line segment (1021) smaller than the first arc line segment (1022) and the second arc line segment (1024), and the length of the upward protrusion (10211) is 8 mm; and / or, A boss (103) is arranged on the explosion-proof valve body (1) outside the explosion notch (102).

10. The burst disc with reinforced score line of claim 3, wherein: The length of the first straight notch (1011) is 12 mm, the length of the second straight notch (1012) is 8.83 mm, and the distance between the second straight line segment (1023) and the closest first straight notch (1011) is 2-3.13 mm.

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