Explosion-proof valve with reinforced nicks

Abstract

The utility model discloses an explosion-proof valve with reinforced nicks, which comprises an explosion-proof valve body, the explosion-proof valve body (1) is provided with two Y-shaped nicks, the Y-shaped nicks are symmetrically connected to form a double-end Y-shaped nick structure, and the explosion-proof valve body is also provided with at least one reinforced nick. A linear nick is formed between the two Y-shaped nicks, and the reinforcing nick is parallel to the linear nick. And the bottom of the linear nick is downwards provided with a groove. Compared with the prior art, the anti-explosion valve has the advantages that the anti-explosion valve is simple in structure, the reinforcing nick is added, the anti-explosion valve can be exploded along the Y-shaped nick, safety is improved, and the opening condition of the anti-explosion valve is accurate and controllable; the reinforcing nick is not communicated with the Y-shaped nick, so that the inhibition of the reinforcing nick on the deformation of the anti-explosion valve body can be weakened, the deformation of the anti-explosion valve body is reduced, and the safety performance of the battery in use is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to an explosion-proof valve with reinforced notches. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. With the continuous development of the battery industry, lithium-ion batteries are widely used in the field of power batteries due to their high energy density to provide power for vehicle operation. Explosion-proof valves play a vital role in the safety of battery cells. When the battery cells have problems such as short circuit, overcharging, overheating, etc., the explosion-proof valve opens in time by sensing the changes in air pressure inside the battery cells to exhaust and relieve pressure, avoiding the risk of battery cell explosion or fire. However, existing explosion-proof valves often do not explode along the notches when they explode, which reduces safety. Therefore, it is very important to obtain an explosion-proof valve with enhanced notches that overcomes the above defects. Utility Model Content

[0003] In order to solve at least one of the above-mentioned technical problems, the utility model provides an explosion-proof valve with reinforced notches, which includes an explosion-proof valve body, and the surface of the explosion-proof valve body is provided with two Y-shaped notches, and the Y-shaped notches are symmetrically connected to form a double-headed Y-shaped notch structure, and the surface of the explosion-proof valve body is also provided with at least one reinforced notch.

[0004] A straight line notch is formed between the two Y-shaped notches, the reinforcement notch is parallel to the straight line notch, and a groove is formed at the bottom of the straight line notch.

[0005] The linear notch is located on the symmetry axis set in the length direction of the explosion-proof valve body. There are two Y-shaped notches, which are set on both sides of the symmetry axis set in the width direction of the explosion-proof valve body. The double-headed Y-shaped notch structure, each branch notch at both ends forms four end points as explosion cut-off points.

[0006] The concave depth of the reinforcing notch is smaller than the concave depth of the Y-shaped notch.

[0007] A raised ring is provided on the periphery of the explosion-proof valve body, a first step surface is formed on the explosion-proof valve body, the upper surface of the raised ring is a second step surface, the double-headed Y-shaped notch and the reinforced notch are both located on the first step surface, or the double-headed Y-shaped notch and the reinforced notch are both located on the first step surface and the back side of the explosion-proof valve body opposite to the first step surface.

[0008] Inclined surfaces are provided between the two sides of the groove and the Y-shaped notch.

[0009] The distance between one side of the reinforcing notch in the length direction and the linear notch is 1-8 mm, preferably 4.49. The distance between the other side of the reinforcing notch in the length direction and the inner wall of the convex ring is 1-8 mm, preferably 3.03. The distance between the outer ends of the reinforcing notches and each blasting cut-off point is 1-10 mm, preferably 4.95, so that the reinforcing notches and the Y-shaped notch are not connected. Two reinforcing notches are provided, and the two reinforcing notches are respectively arranged on both sides of the symmetry axis of the explosion-proof valve body arranged along the length direction; the cross sections of the Y-shaped notch and the reinforcing notch are trapezoidal; the length of the reinforcing notch is 2-12 mm. The distance between each blasting cut-off point and the convex ring is 1-8 mm, preferably 3.

[0010] The length of the reinforcing notch is preferably 11.7 mm.

[0011] Compared with the prior art, the advantages of the present utility model are as follows: the structure of the present utility model is simple. The present utility model adds reinforcing notches, which can enable the explosion-proof valve to burst along the Y-shaped notch, improve safety, and make the opening condition of the explosion-proof valve accurately controllable; the non-connection between the reinforcing notch and the Y-shaped notch can weaken the inhibition of the deformation of the explosion-proof valve body by the reinforcing notch, reduce the deformation amount of the explosion-proof valve body, and improve the safety performance of battery use. Description of the Drawings

[0012] Figure 1 is a three-dimensional view of the present utility model;

[0013] Figure 2 is a front view of the present utility model;

[0014] Figure 3 is Figure 2 an enlarged view of part II of

[0015] Figure 4 is Figure 2 a sectional view taken along line B of

[0016] Figure 5 is Figure 4 an enlarged view of part VIII of

[0017] Figure 6 is Figure 4 an enlarged view of part I of

[0018] Figure 7 is Figure 2 a sectional view taken along line A of

[0019] Figure 8 is a schematic diagram of the back structure of the present utility model;

[0020] Reference Numerals:

[0021] 1 Explosion-proof valve body; 101 Y-shaped notch; 102 Reinforcing notch; 103 Straight notch; 1031 Groove; 1032 Inclined surface; 104 Raised ring; 105 First stepped surface; 106 Second stepped surface. Detailed implementation mode

[0022] In order to enable those skilled in the art to better understand the present utility model and thus more clearly define the scope of protection required by the present utility model, the present utility model will be described in detail below with reference to certain specific embodiments of the present utility model. It should be noted that the following are only some specific implementation modes of the concept of the present utility model, which are only a part of the embodiments of the present utility model. The specific and direct descriptions of the relevant structures are only for the convenience of understanding the present utility model, and each specific feature does not of course and directly limit the implementation scope of the present utility model.

[0023] Referring to the attached drawings, the present utility model adopts the following technical solutions. An explosion-proof valve with a reinforcing notch 102 includes an explosion-proof valve body 1. Two Y-shaped notches 101 are provided on the explosion-proof valve body 1, and the Y-shaped notches 101 are symmetrically connected to form a double-headed Y-shaped notch 101 structure. At least one reinforcing notch 102 is also provided on the explosion-proof valve body 1.

[0024] A straight notch 103 is formed between the two Y-shaped notches 101, and the reinforcing notch 102 is parallel to the straight notch 103. A groove 1031 is recessed downward at the bottom of the straight notch 103.

[0025] The straight notch 103 is located on the axis of symmetry of the explosion-proof valve body 1 arranged along the length direction. There are two Y-shaped notches 101, which are respectively arranged on both sides of the axis of symmetry of the explosion-proof valve body 1 arranged along the width direction. In the double-headed Y-shaped notch structure, each branch notch at both ends forms four end points as the blasting cut-off points H.

[0026] The concave depth of the reinforcing notch 102 is less than the concave depth of the Y-shaped notch 101.

[0027] A raised ring 104 is provided on the periphery of the explosion-proof valve body 1. A first stepped surface 105 is formed on the explosion-proof valve body 1, and the upper surface of the raised ring 104 is the second stepped surface 106. The double-headed Y-shaped notch and the reinforcing notch are both located on the first stepped surface, or the double-headed Y-shaped notch and the reinforcing notch are respectively located on the first stepped surface and the back surface of the explosion-proof valve body opposite to the first stepped surface.

[0028] Inclined surfaces 1032 are provided between both sides of the groove 1031 and the Y-shaped notch 101.

[0029] The distance between one side of the reinforcing notch in the length direction and the straight notch is 1 - 8 mm, preferably 4.49. The distance between the other side of the reinforcing notch in the length direction and the inner wall of the convex ring is 1 - 8 mm, preferably 3.03. The distance between the outer ends of the reinforcing notch and each blasting cut-off point is 1 - 10 mm, preferably 4.95, so that the reinforcing notch and the Y-shaped notch are not connected. Two reinforcing notches are provided, and the two reinforcing notches are respectively arranged on both sides of the symmetry axis arranged along the length direction of the explosion-proof valve body; the cross-sections of the Y-shaped notch and the reinforcing notch are trapezoidal; the length of the reinforcing notch is 2 - 12 mm. The distance between each blasting cut-off point and the convex ring is 1 - 8 mm, preferably 3.

[0030] The length of the reinforcing notch is preferably 11.7 mm.

[0031] Words are engraved on the back of the explosion-proof valve body 1.

[0032] Compared with the prior art, the advantages of the present invention are as follows: The structure of the present invention is simple. The present invention adds a reinforcing notch 102, which can enable the explosion-proof valve to burst along the Y-shaped notch 101, improving safety and making the opening condition of the explosion-proof valve accurately controllable; the non-connection between the reinforcing notch 102 and the Y-shaped notch 101 can weaken the inhibition of the deformation of the explosion-proof valve body 1 by the reinforcing notch 102, reduce the deformation amount of the explosion-proof valve body 1, and improve the safety performance of battery use.

[0033] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the protection scope of the present invention.

Claims

1. An explosion-proof valve with reinforced notches, characterized in that: The explosion-proof valve comprises an explosion-proof valve body (1), wherein the surface of the explosion-proof valve body (1) is provided with two Y-shaped notches (101), the two Y-shaped notches (101) are symmetrically connected to form a double-headed Y-shaped notch (101), and the surface of the explosion-proof valve body (1) is also provided with at least one reinforcement notch (102).

2. The explosion-proof valve with reinforced notches according to claim 1, characterized in that: A straight line notch (103) is formed between the two Y-shaped notches (101), and the reinforcing notch (102) is parallel to the straight line notch (103).

3. The explosion-proof valve with reinforced notches according to claim 2, characterized in that: The linear notch (103) is located on a symmetry axis arranged along the length direction of the explosion-proof valve body (1).

4. The explosion-proof valve with reinforced notches according to claim 1, characterized in that: The depth of the concave portion of the reinforcement notch (102) is smaller than the depth of the concave portion of the Y-shaped notch (101).

5. The explosion-proof valve with reinforced notches according to claim 2, characterized in that: The two Y-shaped notches (101) are arranged on both sides of a symmetry axis arranged along the width direction of the explosion-proof valve body (1), and the branch notches at both ends of the double-headed Y-shaped notch structure form four end points as explosion cut-off points (H).

6. The explosion-proof valve with reinforced notches according to claim 5, characterized in that: A raised ring (104) is provided on the circumferential side of the explosion-proof valve body (1), a first step surface (105) is formed on the explosion-proof valve body (1), the upper surface of the raised ring (104) is a second step surface (106), the double-headed Y-shaped notch (101) and the reinforced notch (102) are both located on the first step surface (105), or the double-headed Y-shaped notch (101) and the reinforced notch (102) are both located on the first step surface (105) and the back side of the explosion-proof valve body (1) opposite to the first step surface (105), respectively.

7. The explosion-proof valve with reinforced notches according to claim 2, characterized in that: The bottom of the linear notch (103) is concavely provided with a groove (1031).

8. The explosion-proof valve with reinforced notches according to claim 7, characterized in that: Inclined surfaces (1032) are provided between the two sides of the groove (1031) and the Y-shaped notch (101).

9. The explosion-proof valve with reinforced notches according to claim 6, characterized in that: The distance between one side of the reinforcing notch (102) in the length direction and the straight notch (103) is 1-8 mm, the distance between the other side of the reinforcing notch (102) in the length direction and the inner wall of the raised ring (104) is 1-8 mm, the distance between the outer end of the reinforcing notch (102) and each bursting cutoff point (H) is 1-10 mm, and the distance between each bursting cutoff point (H) and the raised ring (104) is 1-8 mm, so that the reinforcing notch (102) and the Y-shaped notch (101) are not connected.

10. The explosion-proof valve with reinforced notches according to any one of claims 1 to 9, characterized in that: The reinforcement notches are arranged in two numbers, and the two reinforcement notches are arranged on both sides of a symmetry axis arranged along the length direction of the explosion-proof valve body (1); and / or The cross-sections of the Y-shaped notch (101) and the reinforcement notch (102) are trapezoidal; and / or, The length of the reinforcement notch is 2-12 mm.

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