Anti-explosion sheet, battery cap assembly, battery monomer, battery pack and vehicle

Abstract

The utility model discloses an explosion-proof piece, battery cap subassembly, battery monomer, battery pack and vehicle, the explosion-proof piece includes: explosion-proof piece body, the explosion-proof piece body is provided with nick groove and reinforcing rib, nick groove extends along the outer periphery of explosion-proof piece body, the reinforcing rib is located the radial inner side of nick groove, the nick groove extends along the outer periphery of explosion-proof piece body, and the nick groove extends along the outer periphery of explosion-proof piece body. The reinforcing ribs comprise the two first reinforcing ribs and the two second reinforcing ribs, the first reinforcing ribs extend in the first direction, the two first reinforcing ribs are spaced in the second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing ribs extend in the second direction, and the two second reinforcing ribs are spaced in the first direction. The first direction, the second direction and the thickness direction of the explosion-proof sheet body are perpendicular to each other. According to the anti-explosion sheet disclosed by the utility model, the pressure is prevented from being excessively concentrated at the nick grooves, so that the pressure on the anti-explosion sheet is more uniform, the fatigue strength of the anti-explosion sheet is improved, the detonation pressure is more stable, and the safety of the battery monomer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an explosion-proof sheet, a battery cap assembly, a battery monomer, a battery pack and a vehicle. Background Art

[0002] The main function of the explosion-proof valve aluminum sheet is to be able to open and release pressure from the scored area in time when the internal pressure of the battery cell exceeds the set threshold. Under normal use conditions during the life cycle, the explosion-proof valve sheet must remain completely sealed. As the area of ​​the explosion-proof valve increases, the strength of the large surface of the explosion-proof valve sheet is insufficient, and the stress distribution is uneven when under pressure, which can easily lead to problems such as a decrease in the fatigue strength of the explosion-proof valve sheet and unstable detonation pressure, thereby reducing the safety of the battery. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an explosion-proof plate, the explosion-proof plate is more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate, making the detonation pressure more stable, thereby improving the safety of the battery cell.

[0004] The utility model also provides a battery cap assembly, comprising the explosion-proof sheet.

[0005] The utility model also provides a battery monomer, comprising the battery cap assembly.

[0006] The utility model also provides a battery pack, comprising the above-mentioned battery monomer.

[0007] The utility model also provides a vehicle, comprising the above-mentioned battery pack.

[0008] According to the explosion-proof piece of the embodiment of the utility model, it includes: an explosion-proof piece body, the explosion-proof piece body is provided with a notched groove and a reinforcing rib, the notched groove extends along the outer periphery of the explosion-proof piece body, the reinforcing rib is located radially inside the notched groove, the reinforcing rib includes two first reinforcing ribs and two second reinforcing ribs, the first reinforcing rib extends along a first direction, the two first reinforcing ribs are spaced apart in a second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing rib extends along the second direction, the two second reinforcing ribs are spaced apart along the first direction, and the first direction, the second direction and the thickness direction of the explosion-proof piece body are perpendicular to each other.

[0009] According to the explosion-proof plate of the embodiment of the utility model, a notched groove and a reinforcing rib are provided on the explosion-proof plate body, the notched groove extends along the outer peripheral edge of the explosion-proof plate body, the reinforcing rib is located radially inside the notched groove, the reinforcing rib includes two first reinforcing ribs and two second reinforcing ribs, the first reinforcing rib extends along a first direction, the two first reinforcing ribs are spaced apart in a second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing rib extends along the second direction, and the two second reinforcing ribs are spaced apart along the first direction, so as to avoid excessive concentration of pressure on the notched groove, thereby making the explosion-proof plate body more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0010] In some embodiments of the present invention, the explosion-proof disk body has a body thinning area, and the notched groove and the reinforcing ribs are arranged on the body thinning area.

[0011] In some embodiments of the present invention, the thickness of the thinned area of ​​the main body is smaller than the thickness of the remaining portion of the explosion-proof disk body; and / or the thickness of the thinned area of ​​the main body is 0.1-0.4 mm.

[0012] In some embodiments of the utility model, some of the scored grooves are provided with overlapping ribs, and the two ends of the overlapping ribs are respectively connected to the inner walls on both sides of the scored groove in the width direction.

[0013] In some embodiments of the present invention, the end surface of the lap rib away from the bottom wall of the scored groove is lower than the opening of the scored groove.

[0014] In some embodiments of the present invention, at least one of the first reinforcing rib and the second reinforcing rib is in an elliptical arc shape or a circular arc shape.

[0015] In some embodiments of the present invention, the two first reinforcing ribs protrude toward each other, and / or the two second reinforcing ribs protrude toward each other.

[0016] In some embodiments of the present invention, at least one of the two ends of the first reinforcing rib in the length direction is spaced apart from the scored groove, or at least one of the two ends of the first reinforcing rib in the length direction extends to the inner side wall of the scored groove; the two ends of the first reinforcing rib in the length direction are respectively connected to or spaced apart from two of the second reinforcing ribs; the reinforcing rib is formed as a groove or a convex rib provided on the explosion-proof plate body; the depth of the scored groove is 0.05-0.29mm; the depth or height of the reinforcing rib is 0.01-0.29mm; the depth or height of the reinforcing rib is less than the depth of the scored groove; the two first reinforcing ribs divide the scored groove into four parts, which are the first scored thinning area, the second scored thinning area, the third scored thinning area and the fourth scored thinning area in the circumferential direction of the explosion-proof plate body, and two adjacent ones of the first scored thinning area, the second scored thinning area, the third scored thinning area and the fourth scored thinning area are connected to or spaced apart from each other.

[0017] In some embodiments of the present invention, the first direction is the length direction of the explosion-proof disk body, and the second direction is the width direction of the explosion-proof disk body; or, the first direction is the width direction of the explosion-proof disk body, and the second direction is the length direction of the explosion-proof disk body.

[0018] The battery cap assembly according to the embodiment of the utility model includes the explosion-proof sheet mentioned above.

[0019] According to the cap assembly of the battery in the embodiment of the utility model, by setting the above-mentioned explosion-proof plate, a notched groove and a reinforcing rib are set on the explosion-proof plate body, the notched groove extends along the outer peripheral edge of the explosion-proof plate body, the reinforcing rib is located on the radial inner side of the notched groove, the reinforcing rib includes two first reinforcing ribs and two second reinforcing ribs, the first reinforcing rib extends along the first direction, the two first reinforcing ribs are spaced apart in the second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing rib extends along the second direction, and the two second reinforcing ribs are spaced apart along the first direction, so as to avoid excessive concentration of pressure on the notched groove, so that the explosion-proof plate body is more evenly compressed, so that the explosion-proof plate is more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0020] A battery cell according to an embodiment of the present invention includes the above-mentioned battery cap assembly.

[0021] According to the battery cell of the embodiment of the utility model, by setting the above-mentioned cap assembly and the above-mentioned explosion-proof plate, a notched groove and a reinforcing rib are set on the explosion-proof plate body, the notched groove extends along the outer peripheral edge of the explosion-proof plate body, the reinforcing rib is located on the radial inner side of the notched groove, the reinforcing rib includes two first reinforcing ribs and two second reinforcing ribs, the first reinforcing rib extends along the first direction, the two first reinforcing ribs are spaced apart in the second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing rib extends along the second direction, and the two second reinforcing ribs are spaced apart along the first direction, so as to avoid excessive concentration of pressure on the notched groove, so that the explosion-proof plate body is more evenly compressed, so that the explosion-proof plate is more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0022] A battery pack according to an embodiment of the present invention includes the above-mentioned battery cell.

[0023] According to the battery pack of the embodiment of the utility model, by arranging notched grooves and reinforcing ribs on the explosion-proof plate body, the notched grooves extend along the outer peripheral edge of the explosion-proof plate body, the reinforcing ribs are located radially inward of the notched grooves, the reinforcing ribs include two first reinforcing ribs and two second reinforcing ribs, the first reinforcing ribs extend along the first direction, the two first reinforcing ribs are spaced apart in the second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing ribs extend along the second direction, and the two second reinforcing ribs are spaced apart along the first direction, so as to avoid excessive concentration of pressure on the notched grooves, thereby making the explosion-proof plate body more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0024] A vehicle according to an embodiment of the present utility model includes the above-mentioned battery pack.

[0025] According to the vehicle of the embodiment of the utility model, a notched groove and a reinforcing rib are arranged on the explosion-proof plate body, the notched groove extends along the outer peripheral edge of the explosion-proof plate body, the reinforcing rib is located on the radial inner side of the notched groove, the reinforcing rib includes two first reinforcing ribs and two second reinforcing ribs, the first reinforcing rib extends along the first direction, the two first reinforcing ribs are spaced apart in the second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing rib extends along the second direction, and the two second reinforcing ribs are spaced apart along the first direction, so as to avoid excessive concentration of pressure on the notched groove, so that the explosion-proof plate body is more evenly compressed, thereby making the explosion-proof plate more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate, making the detonation pressure more stable, thereby improving the safety of the battery cell.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a top view of the explosion-proof disk according to the first embodiment of the utility model;

[0029] Figure 2 yes Figure 1 Cross-sectional view at FF;

[0030] Figure 3 yes Figure 2 Enlarged view of point C in the middle;

[0031] Figure 4 yes Figure 2 The enlarged view of point D in the middle;

[0032] Figure 5 yes Figure 1 Enlarged view of point E in the middle;

[0033] Figure 6 is a top view of the explosion-proof disk according to the second embodiment of the utility model;

[0034] Figure 7 It is a top view of the explosion-proof disk according to the third embodiment of the utility model.

[0035] Reference numerals:

[0036] 10. Explosion-proof disk;

[0037] 1. Explosion-proof disk body; 11. Thinning area of ​​the body;

[0038] 2. Score groove; 21. First score thinning area; 22. Second score thinning area; 23. Third score thinning area; 24. Fourth score thinning area;

[0039] 3. Reinforcement rib; 31. First reinforcement rib; 32. Second reinforcement rib;

[0040] 4. Overlap reinforcement. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present utility model, it is necessary to understand 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Please refer to the following Figure 1-Figure 7 A bursting disk 10 according to an embodiment of the present invention is described.

[0045] like Figure 1 and Figure 2 As shown, the explosion-proof disk 10 according to the embodiment of the utility model comprises: an explosion-proof disk body 1.

[0046] Specifically, refer to Figure 1 and Figure 2 The explosion-proof plate body 1 is provided with a notched groove 2 and a reinforcing rib 3, and the notched groove 2 extends along the outer periphery of the explosion-proof plate body 1. It should be noted that when the internal gas pressure of the battery cell is too high, since the notched groove 2 is relatively weak relative to other positions of the explosion-proof plate body 1, the gas can break through the bottom wall of the notched groove 2, thereby achieving a pressure relief effect, thereby preventing the internal gas pressure of the battery cell from being too high and improving the safety of the battery cell. However, since the pressure is concentrated at the notched groove, the pressure on the explosion-proof plate body is uneven, which can easily lead to problems such as a decrease in the fatigue strength of the explosion-proof plate and unstable detonation pressure.

[0047] Furthermore, if Figure 1 and Figure 2As shown, the reinforcing rib 3 is located at the radial inner side of the notched groove 2, and the reinforcing rib 3 includes two first reinforcing ribs 31 and two second reinforcing ribs 32. The first reinforcing rib 31 extends in a first direction (such as Figure 1 The two first reinforcing ribs 31 are spaced apart in the second direction, the two second reinforcing ribs 32 are located between the two first reinforcing ribs 31, and the second reinforcing ribs 32 extend in the second direction (as shown in FIG. Figure 1 The second reinforcement ribs 32 extend in the first direction (direction b) as shown, and the two second reinforcement ribs 32 are spaced apart along the first direction. The first direction, the second direction and the thickness direction of the explosion-proof disk body 1 are perpendicular to each other.

[0048] It can be understood that, by extending the first reinforcing rib 31 along the first direction, the uniformity of the pressure on the explosion-proof plate body 1 in the first direction is improved. At the same time, the second reinforcing rib 32 extends along the second direction, which improves the uniformity of the pressure on the explosion-proof plate body 1 in the second direction, thereby avoiding excessive concentration of pressure on the notched groove 2, so that the pressure on the explosion-proof plate body 1 is more uniform, and the pressure on the explosion-proof plate 10 is more uniform, thereby improving the fatigue strength of the explosion-proof plate 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0049] In addition, if Figure 1 As shown, the two second reinforcing ribs 32 are located between the two first reinforcing ribs 31. Compared with the two second reinforcing ribs being located between the first reinforcing ribs and the scored groove, the two second reinforcing ribs 32 can be arranged away from the scored groove 2, thereby further avoiding excessive concentration of pressure on the scored groove 2, so that the explosion-proof plate body 1 is more evenly compressed, and the explosion-proof plate 10 is more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0050] The outer contour of the explosion-proof disk body 1 can be a racetrack shape (a shape in which the two sides of a long rectangle are connected to two semicircles), an ellipse or a circle, and the cross-sectional contour of the notched groove 2 can be a square, a trapezoid, a triangle, an arc, etc. For example, Figure 1 In the example shown, the outer contour of the bursting disk body 1 is in the shape of a racetrack.

[0051] According to the explosion-proof piece 10 of the embodiment of the utility model, a notched groove 2 and a reinforcing rib 3 are provided on the explosion-proof piece body 1, the notched groove 2 extends along the outer peripheral edge of the explosion-proof piece body 1, the reinforcing rib 3 is located radially inside the notched groove 2, the reinforcing rib 3 includes two first reinforcing ribs 31 and two second reinforcing ribs 32, the first reinforcing rib 31 extends along a first direction, the two first reinforcing ribs 31 are spaced apart in a second direction, the two second reinforcing ribs 32 are located between the two first reinforcing ribs 31, the second reinforcing rib 32 extends along the second direction, and the two second reinforcing ribs 32 are spaced apart in the first direction, thereby avoiding excessive concentration of pressure on the notched groove 2, so that the explosion-proof piece body 1 is more evenly compressed, thereby making the explosion-proof piece 10 more evenly compressed, thereby improving the fatigue strength of the explosion-proof piece 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0052] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the explosion-proof disc body 1 has a body thinning area 11, and the notched groove 2 and the reinforcing rib 3 are arranged on the body thinning area 11. It can be understood that the arrangement of the body thinning area 11 makes the thickness of the explosion-proof disc body 1 at this location small, so that when the explosion-proof disc body 1 is subjected to pressure, it is avoided that the thickness difference between the explosion-proof disc body 1 at the notched groove 2 and the explosion-proof disc body 1 at other locations is too large, thereby further avoiding excessive concentration of pressure at the notched groove 2, so that the explosion-proof disc body 1 is more evenly compressed, thereby making the explosion-proof disc 10 more evenly compressed, thereby improving the fatigue strength of the explosion-proof disc 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0053] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the thickness of the main body thinning area 11 is smaller than the thickness of the rest of the explosion-proof disk body 1, thereby avoiding a large difference in thickness between the explosion-proof disk body 1 at the notched groove 2 and the explosion-proof disk body 1 at the main body thinning area 11, avoiding excessive concentration of pressure at the notched groove 2, and making the explosion-proof disk body 1 more evenly compressed.

[0054] And / or, the depth of the main body thinning area 11 is 0.1-0.4mm, such as 0.1mm, 0.25mm, 0.3mm or 0.4mm, so that the main body thinning area 11 has a suitable depth, which can avoid a large difference in thickness between the explosion-proof plate body 1 at the notched groove 2 and the explosion-proof plate body 1 in the main body thinning area 11, avoid excessive concentration of pressure at the notched groove 2, make the explosion-proof plate body 1 more evenly compressed, and allow the gas to preferentially break through the bottom wall of the notched groove 2, avoid the gas breaking through the main body thinning area 11, thereby making the explosion and pressure relief of the explosion-proof plate 10 more stable and safe.

[0055] In some embodiments of the present invention, Figure 3-Figure 5 As shown, a part of the scored groove 2 is provided with a lap rib 4, and the two ends of the lap rib 4 are respectively connected to the inner walls on both sides in the width direction of the scored groove 2. Therefore, when the bottom wall of the scored groove 2 is broken, the explosion-proof plate body 1 on the radial inner side of the scored groove 2 can be prevented from separating from the battery cell and splashing the user, thereby improving the safety of the explosion-proof plate 10 detonating and decompressing.

[0056] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the end surface of the lap rib 4 away from the bottom wall of the notched groove 2 is lower than the opening of the notched groove 2. Thus, it is avoided that the thickness at the lap rib 4 and the thickness of the explosion-proof disk body 1 at the notched groove 2 are too different, thereby further avoiding excessive concentration of pressure at the notched groove 2, making the explosion-proof disk body 1 more evenly pressurized, and allowing the gas to preferentially break through the bottom wall of the notched groove 2, avoiding the gas from breaking through the body thin area 11, thereby making the explosion and pressure relief of the explosion-proof disk 10 more stable and safe.

[0057] In some embodiments of the present invention, Figure 1 As shown, at least one of the first reinforcing rib 31 and the second reinforcing rib 32 is in an elliptical arc shape or a circular arc shape. Figure 1 and Figure 7 As shown, the first reinforcing rib 31 and the second reinforcing rib 32 are both elliptical arcs. It can be understood that the arc line of the elliptical arc is smoother, so that the explosion-proof plate body 1 is compressed more evenly, thereby improving the fatigue strength of the explosion-proof plate 10, making the detonation pressure more stable, thereby improving the safety of the battery cell.

[0058] Of course, the present invention is not limited to this, the first reinforcing rib 31 and the second reinforcing rib 32 can both be arc-shaped, or the first reinforcing rib 31 is arc-shaped, and the second reinforcing rib 32 is elliptical arc-shaped, or Figure 6 As shown, the second reinforcing rib 32 is in a circular arc shape, and the first reinforcing rib 31 is in an elliptical arc shape.

[0059] In some embodiments of the present invention, Figure 1 As shown, the two first reinforcing ribs 31 protrude toward each other, so that the protruding parts of the two first reinforcing ribs 31 can be arranged away from the scored groove 2, thereby further avoiding excessive concentration of pressure on the scored groove 2, so that the explosion-proof plate body 1 is more evenly compressed, and the explosion-proof plate 10 is more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0060] and / or, if Figure 1As shown, the two second reinforcing ribs 32 protrude toward each other, thereby allowing the protruding portions of the two second reinforcing ribs 32 to be disposed away from the scored groove 2, thereby further avoiding excessive concentration of pressure on the scored groove 2, thereby making the explosion-proof plate body 1 more evenly compressed, thereby making the explosion-proof plate 10 more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0061] In some embodiments of the present invention, Figure 1 As shown, at least one of the two ends of the first reinforcing rib 31 in the length direction is spaced apart from the notched groove 2, thereby avoiding the interference between the first reinforcing rib 31 and the notched groove 2. Alternatively, at least one of the two ends of the first reinforcing rib 31 in the length direction extends to the inner side wall of the notched groove 2, so that the explosion-proof disc body 1 is more evenly compressed, thereby making the explosion-proof disc 10 more evenly compressed, thereby improving the fatigue strength of the explosion-proof disc 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0062] For example, Figure 1 In the example shown, both ends of the first reinforcing rib 31 in the length direction are separated from the notched groove 2, but the utility model is not limited to this. Both ends of the first reinforcing rib 31 in the length direction may extend to the inner wall of the notched groove 2, or one end of the two ends of the first reinforcing rib 31 in the length direction may be separated from the notched groove 2, and the other end extends to the inner wall of the notched groove 2.

[0063] Further, the two ends of the first reinforcing rib 31 in the length direction are respectively connected to the two second reinforcing ribs 32; thereby, the first reinforcing rib 31 and the second reinforcing rib 32 are connected, so that the first reinforcing rib 31 and the second reinforcing rib 32 can bear pressure together, further improving the uniformity of the pressure of the explosion-proof disk 10, or, as Figure 1 As shown, both ends of the first reinforcing rib 31 in the length direction are respectively spaced apart from the two second reinforcing ribs 32 , thereby avoiding interference between the first reinforcing rib 31 and the second reinforcing rib 32 .

[0064] Furthermore, if Figure 3 and Figure 4 As shown, the reinforcing rib 3 is formed as a groove provided on the explosion-proof disc body 1, so that when the explosion-proof disc body 1 is under pressure, since the reinforcing rib 3 is a groove, the thickness of the explosion-proof disc body 1 at this place is small, so that it is convenient to share the pressure of the explosion-proof disc body 1 at the notched groove 2, avoid excessive concentration of pressure on the explosion-proof disc body 1 at the notched groove 2, and thus improve the uniformity of the pressure on the explosion-proof disc 10; or, the reinforcing rib 3 is formed as a convex rib provided on the explosion-proof disc body 1, thereby improving the structural strength of the reinforcing rib 3, so as to better facilitate the compression of the reinforcing rib 3.

[0065] Furthermore, if Figure 3 and Figure 4 As shown, the depth of the notched groove 2 is 0.05-0.29 mm, such as 0.05 mm, 0.08 mm, 0.1 mm or 0.29 mm, etc., so that the notched groove 2 has a suitable depth, which can avoid a large difference in thickness between the explosion-proof disk body 1 at the notched groove 2 and other parts of the explosion-proof disk body 1, avoid excessive concentration of pressure at the notched groove 2, make the explosion-proof disk body 1 more evenly compressed, and ensure that the gas can preferentially break through the bottom wall of the notched groove 2, so that the explosion-proof disk 10 detonation and pressure relief are more stable and safe.

[0066] Furthermore, if Figure 3 and Figure 4 As shown, the depth or height of the reinforcing rib 3 is 0.01-0.29 mm, such as 0.01 mm, 0.05 mm, 0.1 mm or 0.29 mm, etc., so that the reinforcing rib 3 can have a suitable depth or height, so as to avoid a large difference in thickness between the explosion-proof disk body 1 at the notched groove 2 and the explosion-proof disk body 1 at the reinforcing rib 3, avoid excessive concentration of pressure at the notched groove 2, make the explosion-proof disk body 1 more evenly compressed, and allow the gas to preferentially break through the bottom wall of the notched groove 2, avoid the gas breaking through the explosion-proof disk body 1 at the reinforcing rib 3, so that the explosion and pressure relief of the explosion-proof disk 10 are more stable and safe.

[0067] Furthermore, if Figure 3 and Figure 4 As shown, the depth or height of the reinforcing rib 3 is less than the depth of the notched groove 2, thereby allowing the gas to preferentially break through the bottom wall of the notched groove 2, thereby preventing the gas from breaking through the explosion-proof plate body 1 at the reinforcing rib 3, thereby making the explosion-proof plate 10 detonation and pressure relief more stable and safe.

[0068] Furthermore, if Figure 1 As shown, the two first reinforcing ribs 31 divide the scored groove 2 into four parts, which are the first scored thinning area 21, the second scored thinning area 22, the third scored thinning area 23 and the fourth scored thinning area 24 in the circumferential direction of the explosion-proof plate body 1, and the adjacent two of the first scored thinning area 21, the second scored thinning area 22, the third scored thinning area 23 and the fourth scored thinning area 24 are connected to each other or separated.

[0069] It can be understood that the two first reinforcing ribs 31 are separated from each other on both sides to define the first notch thinning area 21 and the third notch thinning area 23, respectively, and the two second reinforcing ribs 32 are separated from each other on both sides to define the second notch thinning area 22 and the fourth notch thinning area 24 between the two first reinforcing ribs 31, wherein, if two adjacent ones of the first notch thinning area 21, the second notch thinning area 22, the third notch thinning area 23 and the fourth notch thinning area 24 are connected to each other, the explosion-proof plate body 1 at the first notch thinning area 21, the second notch thinning area 22, the third notch thinning area 23 and the fourth notch thinning area 24 can be evenly compressed, and at the same time, when the first notch thinning area 21, the second notch thinning area 22, the third notch thinning area 23 and the fourth notch thinning area 24 are broken, the abnormal gas can be quickly discharged.

[0070] If two adjacent ones of the first scored thinning area 21, the second scored thinning area 22, the third scored thinning area 23 and the fourth scored thinning area 24 are spaced apart from each other, it can be prevented that after the bottom wall of the scored groove 2 is broken, the explosion-proof plate body 1 on the radial inner side of the scored groove 2 will be separated from the battery cell and splash injure the user, thereby improving the safety of the battery cell.

[0071] In some embodiments of the present invention, Figure 1 As shown, the first direction is the length direction of the explosion-proof disc body 1, and the second direction is the width direction of the explosion-proof disc body 1; thus, the first reinforcing rib 31 extends along the length direction of the explosion-proof disc body 1, thereby improving the uniformity of the pressure on the explosion-proof disc body 1 in the length direction. At the same time, the second reinforcing rib 32 extends along the width direction of the explosion-proof disc body 1, thereby improving the uniformity of the pressure on the explosion-proof disc body 1 in the width direction, thereby avoiding excessive concentration of pressure on the notched groove 2, thereby making the pressure on the explosion-proof disc body 1 more uniform, thereby making the pressure on the explosion-proof disc 10 more uniform, thereby improving the fatigue strength of the explosion-proof disc 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0072] or, as Figure 2 As shown, the first direction is the width direction of the explosion-proof disc body 1, and the second direction is the length direction of the explosion-proof disc body 1. Therefore, the first reinforcing rib 31 extends along the width direction of the explosion-proof disc body 1, thereby improving the uniformity of the pressure on the explosion-proof disc body 1 in the width direction. At the same time, the second reinforcing rib 32 extends along the length direction of the explosion-proof disc body 1, thereby improving the uniformity of the pressure on the explosion-proof disc body 1 in the length direction, thereby avoiding excessive concentration of pressure on the notched groove 2, thereby making the explosion-proof disc body 1 more uniformly compressed, thereby making the explosion-proof disc 10 more uniformly compressed, thereby improving the fatigue strength of the explosion-proof disc 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0073] The cap assembly of a battery according to an embodiment of the present utility model is described below.

[0074] The battery cap assembly according to the embodiment of the utility model includes the explosion-proof piece 10 mentioned above.

[0075] According to the cap assembly of the battery of the embodiment of the utility model, by setting the above-mentioned explosion-proof plate 10, a notched groove 2 and a reinforcing rib 3 are set on the explosion-proof plate body 1, the notched groove 2 extends along the outer peripheral edge of the explosion-proof plate body 1, the reinforcing rib 3 is located on the radial inner side of the notched groove 2, the reinforcing rib 3 includes two first reinforcing ribs 31 and two second reinforcing ribs 32, the first reinforcing rib 31 extends along the first direction, the two first reinforcing ribs 31 are spaced apart in the second direction, the two second reinforcing ribs 32 are located between the two first reinforcing ribs 31, the second reinforcing rib 32 extends along the second direction, and the two second reinforcing ribs 32 are spaced apart in the first direction, so as to avoid excessive concentration of pressure on the notched groove 2, so that the explosion-proof plate body 1 is more evenly compressed, so that the explosion-proof plate 10 is more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate 10, making the detonation pressure more stable, thereby improving the safety of the battery cell.

[0076] A battery cell according to an embodiment of the present invention is described below.

[0077] A battery cell according to an embodiment of the present invention includes the above-mentioned battery cap assembly.

[0078] According to the battery cell of the embodiment of the utility model, by setting the above-mentioned cap assembly, an explosion-proof plate 10 is set, and a notched groove 2 and a reinforcing rib 3 are set on the explosion-proof plate body 1, the notched groove 2 extends along the outer peripheral edge of the explosion-proof plate body 1, and the reinforcing rib 3 is located on the radial inner side of the notched groove 2. The reinforcing rib 3 includes two first reinforcing ribs 31 and two second reinforcing ribs 32, the first reinforcing rib 31 extends along the first direction, the two first reinforcing ribs 31 are spaced apart in the second direction, the two second reinforcing ribs 32 are located between the two first reinforcing ribs 31, the second reinforcing rib 32 extends along the second direction, and the two second reinforcing ribs 32 are spaced apart in the first direction, so as to avoid excessive concentration of pressure on the notched groove 2, so that the explosion-proof plate body 1 is more evenly compressed, so that the explosion-proof plate 10 is more evenly compressed, thereby improving the fatigue strength of the explosion-proof plate 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0079] A battery pack according to an embodiment of the present invention is described below.

[0080] A battery pack according to an embodiment of the present invention includes the above-mentioned battery cell.

[0081] According to the battery pack of the embodiment of the utility model, a notched groove 2 and a reinforcing rib 3 are provided on the explosion-proof disc body 1, the notched groove 2 extends along the outer periphery of the explosion-proof disc body 1, the reinforcing rib 3 is located radially inward of the notched groove 2, the reinforcing rib 3 includes two first reinforcing ribs 31 and two second reinforcing ribs 32, the first reinforcing rib 31 extends along the first direction, the two first reinforcing ribs 31 are spaced apart in the second direction, the two second reinforcing ribs 32 are located between the two first reinforcing ribs 31, the second reinforcing rib 32 extends along the second direction, and the two second reinforcing ribs 32 are spaced apart in the first direction, so as to avoid excessive concentration of pressure on the notched groove 2, so that the explosion-proof disc body 1 is more evenly compressed, so that the explosion-proof disc 10 is more evenly compressed, thereby improving the fatigue strength of the explosion-proof disc 10, making the detonation pressure more stable, and thus improving the safety of the battery cell.

[0082] A vehicle according to an embodiment of the present invention is described below.

[0083] A vehicle according to an embodiment of the present utility model includes the above-mentioned battery pack.

[0084] According to the vehicle of the embodiment of the utility model, a notched groove 2 and a reinforcing rib 3 are provided on the explosion-proof disk body 1, the notched groove 2 extends along the outer peripheral edge of the explosion-proof disk body 1, the reinforcing rib 3 is located radially inside the notched groove 2, the reinforcing rib 3 includes two first reinforcing ribs 31 and two second reinforcing ribs 32, the first reinforcing rib 31 extends along the first direction, the two first reinforcing ribs 31 are spaced apart in the second direction, the two second reinforcing ribs 32 are located between the two first reinforcing ribs 31, the second reinforcing rib 32 extends along the second direction, and the two second reinforcing ribs 32 are spaced apart in the first direction, thereby avoiding excessive concentration of pressure on the notched groove 2, so that the explosion-proof disk body 1 is more evenly compressed, thereby making the explosion-proof disk 10 more evenly compressed, thereby improving the fatigue strength of the explosion-proof disk 10, making the detonation pressure more stable, thereby improving the safety of the battery cell.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bursting disk, characterized in that: include: A bursting disc body, wherein the bursting disc body is provided with a scored groove and a reinforcing rib, wherein the scored groove extends along the outer periphery of the bursting disc body, the reinforcing rib is located radially inward of the scored groove, the reinforcing rib comprises two first reinforcing ribs and two second reinforcing ribs, the first reinforcing rib extends along a first direction, the two first reinforcing ribs are spaced apart in a second direction, the two second reinforcing ribs are located between the two first reinforcing ribs, the second reinforcing rib extends along the second direction, the two second reinforcing ribs are spaced apart along the first direction, and the first direction, the second direction and the thickness direction of the bursting disc body are perpendicular to each other.

2. The explosion-proof disk according to claim 1, characterized in that: The explosion-proof plate body has a body thinning area, and the notched groove and the reinforcing ribs are arranged on the body thinning area.

3. The explosion-proof disk according to claim 2, characterized in that: The thickness of the thinned area of ​​the main body is smaller than the thickness of the remaining part of the explosion-proof disk body; And / or, the thickness of the thinned area of ​​the main body is 0.1-0.4 mm.

4. The explosion-proof disk according to claim 1, characterized in that: Some of the notched grooves are provided with overlapping ribs, and the two ends of the overlapping ribs are respectively connected to the inner walls on both sides of the notched groove in the width direction.

5. The explosion-proof disk according to claim 4, characterized in that: The end surface of the lap rib away from the bottom wall of the notched groove is lower than the opening of the notched groove.

6. The explosion-proof disk according to claim 1, characterized in that: At least one of the first reinforcing rib and the second reinforcing rib is in an elliptical arc shape or a circular arc shape.

7. The explosion-proof disk according to claim 6, characterized in that: The two first reinforcing ribs protrude toward each other, and / or the two second reinforcing ribs protrude toward each other.

8. The explosion-proof disk according to claim 1, characterized in that: At least one of the two ends of the first reinforcing rib in the length direction is spaced apart from the notched groove, or at least one of the two ends of the first reinforcing rib in the length direction extends to the inner side wall of the notched groove; Both ends of the first reinforcing rib in the length direction are respectively connected to or spaced apart from two of the second reinforcing ribs; The reinforcing ribs are formed as grooves or convex ribs provided on the explosion-proof disk body; The depth of the scored groove is 0.05-0.29 mm; The depth or height of the reinforcing rib is 0.01-0.29 mm; The depth or height of the reinforcing rib is less than the depth of the scored groove; The two first reinforcing ribs divide the scored groove into four parts, which are the first scored thinning area, the second scored thinning area, the third scored thinning area and the fourth scored thinning area in the circumferential direction of the explosion-proof plate body, and two adjacent ones of the first scored thinning area, the second scored thinning area, the third scored thinning area and the fourth scored thinning area are connected to or spaced apart from each other.

9. The explosion-proof disk according to claim 1, characterized in that: The first direction is the length direction of the explosion-proof disk body, and the second direction is the width direction of the explosion-proof disk body; Alternatively, the first direction is the width direction of the explosion-proof disk body, and the second direction is the length direction of the explosion-proof disk body.

10. A battery cap assembly, characterized in that: Comprising a bursting disk according to any one of claims 1-9.

11. A battery cell, characterized in that: A cap assembly comprising the battery according to claim 10.

12. A battery pack, characterized in that: The invention comprises the battery cell according to claim 11.

13. A vehicle, characterized in that: Comprising the battery pack according to claim 12.

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