Explosion-proof valve and battery pack

Abstract

The utility model discloses an explosion-proof valve and a battery pack, the explosion-proof valve comprises a valve body, the valve body is provided with a nick groove and rib grooves, the nick groove extends along the circumferential direction of the valve body and is located at the outer side of the rib grooves, the number of the rib grooves is two, the rib grooves are symmetrical along the width direction of the valve body, the rib grooves comprise a first rib and a second rib, and the first rib and the second rib are arranged on the valve body. The first rib and the second rib form an angle and intersect to form an intersection point, and a connecting line of the intersection points of the two rib grooves passes through the center point of the valve body. According to the anti-explosion valve, the rib grooves buffer stress concentration occurring at the nick grooves in the installation process of the anti-explosion valve or the charging and discharging process of a battery pack, the connecting line of the intersection points of the two rib grooves passes through the center point of the valve body, the structural strength of the center area of the valve body is enhanced, the pressure at the nick grooves is reduced, and therefore the integrity of the nick grooves is kept; the valve is further prevented from being opened in advance, and the stability and the reliability of the whole anti-explosion valve and the battery pack applying the anti-explosion valve are improved.

Description

Technical Field

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

[0002] The explosion-proof valve plays a particularly crucial role in the safety performance of the battery pack. It can open when the internal air pressure is too high to prevent explosion, thereby improving safety. However, during the installation of the explosion-proof valve and the internal pressure cycle during the charging and discharging process of the battery pack, the explosion-proof valve fluctuates up and down, and stress concentration may occur at the notch groove, resulting in premature valve opening and posing a certain safety risk. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an explosion-proof valve, which reduces the pressure at the notch groove, maintains the integrity of the notch groove, and prevents premature valve opening.

[0004] The utility model also provides a battery pack, which includes the above explosion-proof valve.

[0005] The explosion-proof valve according to an embodiment of the utility model includes: a valve body, the valve body is provided with a notch groove and a rib groove, the notch groove extends along the circumferential direction of the valve body and is located outside the rib groove, there are two rib grooves and they are symmetric along the width direction of the valve body, the rib groove includes a first rib and a second rib, the first rib and the second rib form an angle with each other and intersect to form an intersection point, and the connection line of the intersection points of the two rib grooves passes through the center point of the valve body.

[0006] For the explosion-proof valve according to an embodiment of the utility model, the valve body is provided with a notch groove and a rib groove. The notch groove extends along the circumferential direction of the valve body and is located outside the rib groove. Since there are two rib grooves and they are symmetric along the width direction of the valve body, the rib grooves buffer the stress concentration at the notch groove during the installation of the explosion-proof valve or the charging and discharging process of the battery pack, avoiding premature valve opening. At the same time, the rib groove includes a first rib and a second rib, the first rib and the second rib form an angle with each other and intersect to form an intersection point. By the connection line of the intersection points of the two rib grooves passing through the center point of the valve body, the structural strength of the central region of the valve body is enhanced, the pressure at the notch groove is reduced, so as to maintain the integrity of the notch groove, further prevent premature valve opening, and improve the stability and reliability of the overall explosion-proof valve and the battery pack applying the explosion-proof valve.

[0007] In some embodiments of the utility model, the two rib grooves are symmetric along the center line of the width direction of the valve body.

[0008] In some embodiments of the present utility model, the first rib includes a first section and a second section, and the connection point of the first section and the second section is the intersection point. The second rib includes a third section and a fourth section, and the connection point of the third section and the fourth section is the intersection point. The first section and the third section are symmetric about the central axis of the valve body in the length direction of the valve body, and the second section and the fourth section are symmetric about the central axis of the valve body in the length direction of the valve body.

[0009] In some embodiments of the present utility model, the first ribs of the two rib grooves extend towards each other and are connected; and / or, the second ribs of the two rib grooves extend towards each other and are connected.

[0010] In some embodiments of the present utility model, the valve body includes a main body portion, the main body portion is rectangular, the rib groove is located within the main body portion. Along the length direction of the valve body, the size of the main body portion is L1, the size of the first rib is L2, the size of the second rib is L3, and it satisfies: L1 = 2L2 = 2L3, and the intersection point is located at the midpoint of the first rib along the length direction of the valve body.

[0011] In some embodiments of the present utility model, the valve body includes a main body portion, the main body portion is rectangular, the rib groove is located within the main body portion. Along the width direction of the valve body, the size of the main body portion is H1, the minimum size from the first rib to the outer peripheral wall of the main body portion is H2, the minimum size from the second rib to the outer peripheral wall of the main body portion is H3, and it satisfies: H1 = 4H2 = 4H3.

[0012] In some embodiments of the present utility model, along the thickness direction of the valve body, the size of the valve body is a, the size of the rib groove is b, the size of the notch groove is c, and it satisfies: a > b > c.

[0013] In some embodiments of the present utility model, b ≤ 1 / 3a.

[0014] In some embodiments of the present utility model, it further includes: a mounting portion, the mounting portion surrounds the outer peripheral wall of the valve body and is connected to the valve body. Along the thickness direction of the valve body, the size of the valve body is a, the size of the mounting portion is d, and it satisfies d ≥ a.

[0015] The battery pack according to the embodiment of the present utility model includes the above-mentioned explosion-proof valve.

[0016] According to the battery pack of the embodiment of the present utility model, an explosion-proof valve is provided. The valve body is provided with a scoring groove and a rib groove. The scoring groove extends along the circumferential direction of the valve body and is located outside the rib groove. Since there are two rib grooves and they are symmetric along the width direction of the valve body, the rib grooves buffer the stress concentration that occurs at the scoring groove during the installation process of the explosion-proof valve or during the charge and discharge process of the battery pack, avoiding premature valve opening. At the same time, the rib groove includes a first rib and a second rib. The first rib and the second rib form an angle with each other and intersect to form an intersection point. The connection line of the intersection points of the two rib grooves passes through the center point of the valve body, strengthening the structural strength of the central area of the valve body, reducing the pressure at the scoring groove, thereby maintaining the integrity of the scoring groove, further preventing premature valve opening, and improving the stability and reliability of the battery pack.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a front view of the explosion-proof valve according to the embodiment of the present utility model;

[0020] Figure 2 is along Figure 1 the cross-sectional view taken along line A-A in

[0021] Figure 3 is Figure 2 the enlarged view at B in

[0022] Figure 4 is Figure 2 the enlarged view at C in

[0023] REFERENCE MARKS:

[0024] 100, explosion-proof valve;

[0025] 1, valve body; 11, scoring groove; 12, rib groove; 121, first rib; 1211, first section; 1212, second section; 122, second rib; 1221, third section; 1222, fourth section;

[0026] 2, installation part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 thus should not be construed as a limitation of 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 stated, the meaning of "a plurality" is two or more.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] The explosion-proof valve 100 according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0031] As Figures 1 - 4 shown, the explosion-proof valve 100 according to an embodiment of the present utility model includes a valve body 1. Among them, the valve body 1 is provided with a scoring groove 11 and a rib groove 12. The scoring groove 11 extends along the circumferential direction of the valve body 1 and is located outside the rib groove 12. There are two rib grooves 12, which are symmetric along the width direction of the valve body 1 (such as Figure 1 the first direction shown). The rib groove 12 includes a first rib 121 and a second rib 122. The first rib 121 and the second rib 122 form an angle with each other and intersect to form an intersection point. The connecting line of the intersection points of the two rib grooves 12 passes through the center point of the valve body 1.

[0032] It can be understood that the rib grooves 12 effectively strengthen the structural strength of the valve body 1, thereby buffering the stress concentration at the notch groove 11 during the installation of the explosion-proof valve 100 or during the charge and discharge process of the battery pack, avoiding premature valve opening, and improving the stability and reliability of the overall explosion-proof valve 100 and the battery pack applying the explosion-proof valve 100.

[0033] Meanwhile, since there are two rib grooves 12 and they are symmetric along the width direction of the valve body 1, when the valve body 1 is under pressure, it can avoid stress concentration in a certain direction or area, but can disperse along the trend of the rib grooves 12 to the entire valve body 1, making the micro-fluctuation form of the explosion-proof valve 100 more uniform, thereby further avoiding stress concentration, improving the overall reliability, and prolonging the service life of the explosion-proof valve 100.

[0034] In addition, the rib groove 12 includes a first rib 121 and a second rib 122. The first rib 121 and the second rib 122 are angled with each other and intersect to form an intersection point. The connecting line of the intersection points of the two rib grooves 12 passes through the center point of the valve body 1. By the connecting line of the intersection points of the two rib grooves 12 passing through the center point of the valve body 1, the structural strength of the central area of the valve body 1 is further strengthened. Thus, when the valve body 1 is under pressure, through strengthening the structural strength of the central area of the valve body 1, it can effectively absorb and disperse the pressure, reduce the pressure at the notch groove 11, thereby maintaining the integrity of the notch groove 11 and further preventing premature valve opening.

[0035] For the explosion-proof valve 100 according to the embodiment of the present invention, the valve body 1 is provided with a notch groove 11 and rib grooves 12. The notch groove 11 extends along the circumferential direction of the valve body 1 and is located outside the rib grooves 12. Since there are two rib grooves 12 and they are symmetric along the width direction of the valve body 1, the rib grooves 12 buffer the stress concentration at the notch groove 11 during the installation of the explosion-proof valve 100 or during the charge and discharge process of the battery pack, avoiding premature valve opening. Meanwhile, the rib groove 12 includes a first rib 121 and a second rib 122. The first rib 121 and the second rib 122 are angled with each other and intersect to form an intersection point. By the connecting line of the intersection points of the two rib grooves 12 passing through the center point of the valve body 1, the structural strength of the central area of the valve body 1 is strengthened, the pressure at the notch groove 11 is reduced, thereby maintaining the integrity of the notch groove 11, further preventing premature valve opening, and improving the stability and reliability of the overall explosion-proof valve 100 and the battery pack applying the explosion-proof valve 100.

[0036] In some embodiments of the present invention, as Figure 1 shown, the two rib grooves 12 are symmetric about the center line along the width direction of the valve body 1. Thus, through such a setting, it further ensures the strengthening of the structural strength of the central area of the valve body 1 by the rib grooves 12, and balances the stress distribution inside the valve body 1, further avoiding stress concentration, improving the overall reliability, and prolonging the service life of the explosion-proof valve 100.

[0037] In some embodiments of the present invention, as Figure 1As shown, the first rib 121 includes a first section 1211 and a second section 1212. The connection point of the first section 1211 and the second section 1212 is an intersection point. The second rib 122 includes a third section 1221 and a fourth section 1222. The connection point of the third section 1221 and the fourth section 1222 is an intersection point. The first section 1211 and the third section 1221 are symmetric about the center line in the length direction of the valve body 1, and the second section 1212 and the fourth section 1222 are symmetric about the center line in the length direction of the valve body 1 (such as Figure 1 the second direction shown).

[0038] Thus, through such a setting, the rib grooves 12 are symmetric about the center line in the length direction of the valve body 1, thereby further ensuring the strengthening of the structural strength of the central region of the valve body 1 by the rib grooves 12, and balancing the stress distribution inside the valve body 1, further avoiding stress concentration, improving the overall reliability, and prolonging the service life of the explosion-proof valve 100.

[0039] In some embodiments of the present invention, as Figure 1 shown, the first ribs 121 of the two rib grooves 12 extend towards each other and are connected. It can be understood that the connection region of the two first ribs 121 is located in the central region of the valve body 1. Thus, through such a setting, the effect of strengthening the structural strength of the central region of the valve body 1 by the rib grooves 12 is further improved. When the valve body 1 is under pressure, the stress concentration phenomenon of the notch groove 11 is effectively reduced, and the premature opening of the valve is effectively prevented.

[0040] In some embodiments of the present invention, as Figure 1 shown, the second ribs 122 of the two rib grooves 12 extend towards each other and are connected. It can be understood that the connection region of the two second ribs 122 is located in the central region of the valve body 1. Thus, through such a setting, the effect of strengthening the structural strength of the central region of the valve body 1 by the rib grooves 12 is further improved. When the valve body 1 is under pressure, the stress concentration phenomenon of the notch groove 11 is effectively reduced, and the premature opening of the valve is effectively prevented.

[0041] In some embodiments of the present invention, as Figure 1 shown, the valve body 1 includes a main body part, the main body part is rectangular, the rib grooves 12 are located inside the main body part. Along the length direction of the valve body 1, the size of the main body part is L1, the size of the first rib 121 is L2, and the size of the second rib 122 is L3, and it satisfies: L1 = 2L2 = 2L3, and the intersection point is located at the midpoint of the first rib 121 along the length direction of the valve body 1.

[0042] Thus, through the size limitation of the first rib 121 and the second rib 122 along the length direction of the valve body 1, the two rib grooves 12 are symmetric about the center line in the width direction of the valve body 1 and the center line in the length direction of the valve body 1, further avoiding stress concentration in a certain direction or region, buffering the stress concentration at the notch groove 11, avoiding premature opening of the valve, improving the overall reliability, and prolonging the service life of the explosion-proof valve 100.

[0043] Specifically, along the length direction of the valve body 1 , the distance from the intersection of one rib groove 12 to the end of the second rib 122 of the rib groove 12 away from the other rib groove 12 is L4, L2=2L4, thereby making the intersection point located at the midpoint of the first rib 121 along the length direction of the valve body 1 .

[0044] In some embodiments of the present invention, Figure 1 As shown, the valve body 1 includes a main body, which is rectangular. The rib groove 12 is located in the main body. Along the width direction of the valve body 1, the size of the main body is H1, the minimum size of the outer peripheral wall from the first rib 121 to the main body is H2, and the minimum size of the outer peripheral wall from the second rib 122 to the main body is H3, and it satisfies: H1=4H2=4H3.

[0045] Therefore, by limiting the size of the first rib 121 and the second rib 122 along the width direction of the valve body 1, the rib groove 12 is located in the middle area of ​​the valve body 1, thereby effectively improving the structural strength of the central area of ​​the valve body 1, effectively absorbing and dispersing the pressure, reducing the pressure at the notched groove 11, and thus maintaining the integrity of the notched groove 11, further preventing premature valve opening. At the same time, such a size limitation makes the two rib grooves 12 symmetrical along the center line of the valve body 1 in the length direction of the valve body 1, further preventing premature valve opening, improving overall reliability, and extending the life of the explosion-proof valve 100.

[0046] In some embodiments of the present invention, Figures 2 - 4 As shown, along the thickness direction of the valve body 1 (such as Figure 2 In the third direction shown in FIG. 1 , the size of the valve body 1 is a, the size of the rib groove 12 is b, and the size of the notched groove 11 is c, and the following conditions are satisfied: a>b>c. It can be understood that along the thickness direction of the valve body 1, the size of the valve body 1 is larger than the size of the rib groove 12, so that the structural strength of the valve body 1 is effectively ensured, and the size of the rib groove 12 is larger than the size of the notched groove 11, so that the rib groove 12 is effectively ensured to share the stress, and the valve opening requirement of the explosion-proof valve 100 is ensured, thereby improving the overall reliability.

[0047] In some embodiments of the present invention, Figure 4 As shown, b≤1 / 3a. Thus, by such an arrangement, the rib groove 12 is smaller along the thickness direction of the valve body 1, and when the valve body 1 is subjected to pressure, the rib groove 12 is more likely to deform, thereby buffering the stress concentration at the notch, thereby improving the overall performance stability of the explosion-proof valve 100.

[0048] In some embodiments of the present invention, Figures 1 - 3 As shown, the explosion-proof valve 100 further includes a mounting portion 2. The mounting portion 2 surrounds the outer peripheral wall of the valve body 1 and is connected to the valve body 1. Figure 2in the third direction shown, the size of the valve body 1 is a, and the size of the mounting portion 2 is d, and d≥a is satisfied. It can be understood that the mounting portion 2 is used to connect with the cover plate. Thus, while the explosion-proof valve 100 is installed on the cover plate through the mounting portion 2, the stress concentration generated during connection is reduced on the valve body 1, thereby reducing the stress concentration at the notch groove 11 and avoiding premature valve opening. At the same time, along the thickness direction of the valve body 1, by restricting the sizes of the mounting portion 2 and the valve body 1, the structural strength of the mounting portion 2 and the valve body 1 is ensured, and the overall reliability is improved.

[0049] The battery pack according to an embodiment of the present invention will be described below.

[0050] The battery pack according to an embodiment of the present invention includes an explosion-proof valve 100.

[0051] For the battery pack according to an embodiment of the present invention, an explosion-proof valve 100 is provided. The valve body 1 is provided with a notch groove 11 and a rib groove 12. The notch groove 11 extends along the circumferential direction of the valve body 1 and is located outside the rib groove 12. The rib grooves 12 are two and symmetric along the width direction of the valve body 1, so that the rib grooves 12 buffer the stress concentration that appears at the notch groove 11 during the installation process of the explosion-proof valve 100 or during the charge and discharge process of the battery pack, avoiding premature valve opening. At the same time, the rib groove 12 includes a first rib 121 and a second rib 122. The first rib 121 and the second rib 122 are angled with each other and intersect to form an intersection point. The connecting line of the intersection points of the two rib grooves 12 passes through the center point of the valve body 1, strengthening the structural strength of the central region of the valve body 1, reducing the pressure at the notch groove 11, thereby maintaining the integrity of the notch groove 11, further preventing premature valve opening, and improving the stability and reliability of the battery pack.

[0052] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An explosion-proof valve, characterized in that: include: A valve body, wherein the valve body is provided with a notched groove and a rib groove, wherein the notched groove extends along the circumferential direction of the valve body and is located on the outside of the rib groove, wherein there are two rib grooves and they are symmetrical along the width direction of the valve body, wherein the rib groove includes a first rib and a second rib, wherein the first rib and the second rib are at an angle to each other and intersect to form an intersection, and a line connecting the intersection points of the two rib grooves passes through the center point of the valve body.

2. The explosion-proof valve according to claim 1, characterized in that: The two rib grooves are symmetrical along the center line of the width direction of the valve body.

3. The explosion-proof valve according to claim 1, characterized in that: The first rib includes a first section and a second section, the connection point between the first section and the second section is the intersection point, the second rib includes a third section and a fourth section, the connection point between the third section and the fourth section is the intersection point, the first section and the third section are symmetrical along the center line of the length direction of the valve body, and the second section and the fourth section are symmetrical along the center line of the length direction of the valve body.

4. The explosion-proof valve according to claim 1, characterized in that: The first ribs of the two rib grooves extend toward each other and are connected; And / or, the second ribs of the two rib grooves extend toward each other and are connected.

5. The explosion-proof valve according to claim 1, characterized in that: The valve body includes a main body, which is rectangular. The rib groove is located in the main body. Along the length direction of the valve body, the size of the main body is L1, the size of the first rib is L2, and the size of the second rib is L3, and it satisfies: L1=2L2=2L3, and the intersection is located at the midpoint of the first rib along the length direction of the valve body.

6. The explosion-proof valve according to claim 1, characterized in that: The valve body includes a main body portion, which is rectangular. The rib groove is located in the main body portion. Along the width direction of the valve body, the size of the main body portion is H1, the minimum size of the outer peripheral wall from the first rib to the main body portion is H2, and the minimum size of the outer peripheral wall from the second rib to the main body portion is H3, and it satisfies: H1=4H2=4H3.

7. The explosion-proof valve according to claim 1, characterized in that: Along the thickness direction of the valve body, the size of the valve body is a, the size of the rib groove is b, the size of the notch groove is c, and they satisfy: a>b>c.

8. The explosion-proof valve according to claim 7, characterized in that: b≤1 / 3a.

9. The explosion-proof valve according to claim 1, characterized in that: Also includes: The mounting portion surrounds the outer peripheral wall of the valve body and is connected to the valve body. Along the thickness direction of the valve body, the size of the valve body is a, the size of the mounting portion is d, and d≥a is satisfied.

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

Images