Anti-explosion valve bearing assembly and battery

Abstract

The invention relates to the technical field of batteries, in particular to an anti-explosion valve bearing assembly and a battery, the anti-explosion valve bearing assembly comprises a main body, an anti-explosion valve and a reinforcing ring, a mounting through hole penetrating through the two sides of the main body is formed in the main body in the X-axis direction, and the anti-explosion valve is mounted in the mounting through hole; the main body is provided with a reinforcing ring located on the periphery of the anti-explosion valve, and the reinforcing ring is arranged on the side, close to a pole group of the battery, of the main body in the X-axis direction. The main body can be the shell of the battery, the reinforcing ring is arranged on the periphery of the anti-explosion valve, the overall mechanical strength of the anti-explosion valve area is enhanced, deformation can be effectively resisted, then the stability of the anti-explosion valve is guaranteed, the problems of cracking, liquid leakage and the like of the anti-explosion valve due to deformation of the shell are solved, the reinforcing ring is arranged on the periphery of the anti-explosion valve, and the service life of the anti-explosion valve is prolonged. In addition, the reinforcing ring is arranged on the inner side of the shell, so that the reinforcing ring is not easy to interfere with parts outside the shell.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to an explosion-proof valve bearing assembly and a battery. Background Art

[0002] Currently, in the fields of electronics, electric vehicles, etc., people have higher and higher requirements for the energy density of batteries, and thus require components such as structural parts of the batteries to occupy as little limited space as possible. Structural parts such as covers and housings are gradually becoming thinner and lighter. However, with the thinning and lightening of the covers and housings, the mechanical strength of the structural parts will also decrease to some extent, and the ability to resist bending deformation will decrease. For the explosion-proof valve, it is usually welded to the cover or housing. The cover or housing serves as the carrier of the explosion-proof valve, and the thinning and lightening of the cover and housing directly affect the structural stability of the explosion-proof valve. Summary of the Invention

[0003] The purpose of the present application is to provide an explosion-proof valve bearing assembly and a battery, which to a certain extent solve the technical problem in the prior art that the thinning and lightening of the cover and housing of the battery directly affect the structural stability of the explosion-proof valve thereon.

[0004] The present application provides an explosion-proof valve bearing assembly, including: a main body, an explosion-proof valve, and a reinforcing ring; wherein, along the X-axis direction, the main body is formed with an installation through-hole penetrating through both sides thereof, and the explosion-proof valve is installed in the installation through-hole; the main body is provided with a reinforcing ring located outside the explosion-proof valve and extending circumferentially, and along the X-axis direction, the reinforcing ring is arranged on the side of the main body close to the electrode group of the battery.

[0005] In the above technical solution, further, the main body is formed with an installation groove recessed toward the side away from the electrode group of the battery, and the reinforcing ring is arranged in the installation groove.

[0006] In any of the above technical solutions, further, along the X-axis direction, the bottom wall of the installation groove is formed with the installation through-hole.

[0007] In any of the above technical solutions, further, the reinforcing ring is connected to the main body by welding.

[0008] In any of the above technical solutions, further, the reinforcing ring is connected to the main body by gluing.

[0009] In any of the above technical solutions, further, the reinforcing ring is formed on the main body by stamping.

[0010] In any of the above technical solutions, further, along the X-axis direction, the height difference between the reinforcing ring and the inner surface of the main body is h, and -5 mm ≤ h ≤ 5 mm.

[0011] In any of the above technical solutions, further, in the Y-axis direction perpendicular to the X-axis direction, the width of the reinforcing ring is a, the wall thickness of the main body on the side of the explosion-proof valve is t, and a ≥ 0.01t.

[0012] In any of the above technical solutions, further, in the Y-axis direction perpendicular to the X-axis direction, the maximum distance between the reinforcing ring and the explosion-proof valve is c, the wall thickness of the main body on the side of the explosion-proof valve is t, and 0 < c ≤ 5t.

[0013] The present application also provides a battery, including the explosion-proof valve bearing assembly described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of this explosion-proof valve bearing assembly, and will not be elaborated herein.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows: The main body provided in the present application can be the housing of the battery, and will also be described by taking this as an example hereinafter. A reinforcing ring is arranged on the outer periphery of the explosion-proof valve, strengthening the overall mechanical strength of the explosion-proof valve area, effectively resisting deformation, and then ensuring the stability of the explosion-proof valve, so that the explosion-proof valve will not crack and leak liquid due to the deformation of the housing. Moreover, the reinforcing ring is arranged on the outer periphery of the explosion-proof valve, which will not block the exhaust channel during the thermal runaway of the battery. In addition, the reinforcing ring is arranged inside the housing and does not protrude from the housing, reducing the occupied space and not easily interfering with the components outside the housing.

[0015] In addition, the main body, that is, the housing, is formed with an installation groove recessed toward the side away from the electrode group of the battery, and the reinforcing ring is arranged in the installation groove, avoiding occupying too much space inside the electrode group and contributing to the capacity increase of the battery.

[0016] In addition, installation through holes are directly designed on the bottom wall of the installation groove. Then, after the explosion-proof valve is installed in the installation through holes, the reinforcing ring located in the installation through holes can be arranged around the outer periphery of the explosion-proof valve.

[0017] In addition, the reinforcing ring is connected to the main body by welding or gluing, which is simple and convenient to operate. Of course, the reinforcing ring can also be directly formed on the inner surface of the housing by stamping, with higher production efficiency and no need for subsequent processing and manufacturing.

[0018] In addition, the reinforcing ring can protrude from the installation groove or not protrude from the installation groove, and the height difference between the reinforcing ring and the inner surface of the housing on the outer periphery of the notch of the installation groove is within the range of 0 - 5 mm, which can not only ensure the strengthening effect and improve the deformation resistance ability of the explosion-proof valve area, but also the space inside the housing is small, contributing to the capacity increase. Description of the Drawings To more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the explosion-proof valve bearing assembly provided by an embodiment of the present application; Figure 2 Another structural schematic diagram of the explosion-proof valve bearing assembly provided by an embodiment of the present application; Figure 3 is Figure 2 Cross-sectional view along the A-A section; Figure 4 is Figure 3 Enlarged structural schematic diagram at B; Figure 5 is Figure 3 Enlarged schematic diagram of another structure at B; Figure 6 is Figure 3 Enlarged schematic diagram of yet another structure at B.

[0020] Reference numerals: 1 - Main body, 11 - Installation groove, 12 - Installation through hole, 13 - Inner surface, 2 - Explosion-proof valve, 3 - Reinforcing ring. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions of the present application with reference to the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments.

[0022] Generally, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application.

[0023] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0024] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" 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 application can be understood according to specific situations.

[0026] The following refers to Figures 1 to 6 Describe the explosion-proof valve bearing assembly and battery according to some embodiments of the present application.

[0027] Embodiment 1 Refer to Figures 1 to 4 As shown, an embodiment of the present application provides an explosion-proof valve bearing assembly, including: a main body 1, an explosion-proof valve 2, and a reinforcing ring 3; wherein, along the X-axis direction, the main body 1 is formed with an installation through-hole 12 penetrating through both sides thereof, and the explosion-proof valve 2 is installed in the installation through-hole 12; the main body 1 is provided with a reinforcing ring 3 located on the outer periphery of the explosion-proof valve 2, and along the X-axis direction, the reinforcing ring 3 is arranged on the side of the main body 1 close to the electrode group of the battery.

[0028] According to the structure described above, it can be known that the main body 1 provided in the present application can be the housing of the battery, and this will be used as an example for further description hereinafter. A reinforcing ring 3 is arranged on the outer periphery of the explosion-proof valve 2, which strengthens the overall mechanical strength of the explosion-proof valve area, can effectively resist deformation, and further ensure the stability of the explosion-proof valve 2, so that the explosion-proof valve 2 will not crack and leak liquid due to the deformation of the housing. Moreover, the reinforcing ring 3 is arranged on the outer periphery of the explosion-proof valve 2, which will not block the exhaust passage during the thermal runaway of the battery. In addition, the reinforcing ring 3 is arranged inside the housing, does not protrude from the housing, and is not easily interfered with by the components outside the housing.

[0029] Further, preferably, the X-axis direction can be the direction of the wall thickness of the housing.

[0030] It should be noted that: The main body 1 provided in this application is not limited to the housing of the battery, and it can also be the cover plate of the battery. And a reinforcing ring 3 is arranged on the cover plate and around the outer periphery of the explosion-proof valve 2, which plays a role in increasing the strength, can effectively resist deformation, and further ensure the stability of the explosion-proof valve 2, so that the explosion-proof valve 2 will not crack and leak liquid due to the deformation of the cover plate. And at this time, the X-axis direction can be the thickness direction of the cover plate.

[0031] In this embodiment, preferably, as Figure 4 shown, the main body 1, that is, the housing, is formed with an installation groove 11 recessed toward the side away from the electrode group of the battery, and the reinforcing ring 3 is arranged in the installation groove 11. According to the structure described above, the reinforcing ring 3 is arranged in the installation groove 11, avoiding occupying too much space inside the electrode group, which helps to increase the capacity of the battery.

[0032] It should be noted that: It is not limited to the foregoing structure of setting the installation groove 11 on the main body 1 and arranging the reinforcing ring 3 in the installation groove 11. The reinforcing ring 3 can also be directly arranged on the inner side surface 13 of the housing, and it is specifically selected according to actual needs. In this embodiment, preferably, as Figure 4 shown, along the X-axis direction, an installation through-hole 12 is formed on the bottom wall of the installation groove 11. According to the structure described above, the installation through-hole 12 is directly designed on the bottom wall of the installation groove 11. Then, after the explosion-proof valve 2 is installed in this installation through-hole 12, the reinforcing ring 3 located in the installation through-hole 12 can be arranged around the outer periphery of the explosion-proof valve 2.

[0033] It should be noted that: It is not limited to the above structure that the installation through-hole 12 is formed on the bottom wall of the installation groove 11 along the X-axis direction. The installation groove 11 can also be designed as an annular groove, and it is designed around the outer periphery of the explosion-proof valve 2 on the housing, and the structure of the area of the housing for installing the explosion-proof valve 2 can be designed according to actual needs. In this embodiment, preferably, as Figure 4 shown, the reinforcing ring 3 is connected to the main body 1 by welding. According to the structure described above, the reinforcing ring 3 is a structure independent of the housing, and it is finally fixed on the housing by welding. The welding process is mature and the production efficiency is relatively high.

[0034] It should be noted that: The reinforcing ring 3 is not limited to being connected to the housing by welding, and other methods can also be used. For example, the reinforcing ring 3 is connected to the main body 1, i.e., the housing, by gluing, or the aforementioned reinforcing ring 3 is directly stamped on the main body 1, i.e., the housing. The operation is simple and convenient, the production efficiency is high, the consistency is good, and the reinforcing ring 3 and the main body 1, i.e., the housing, are of an integral structure, with high overall strength and not easily damaged. Specifically, it is selected according to actual needs. In this embodiment, preferably, as Figure 4 shown, along the X-axis direction, the reinforcing ring 3 protrudes from the inner surface 13 of the main body 1, and the height difference between the reinforcing ring 3 and the inner surface 13 of the main body 1 is h, and -5 mm ≤ h ≤ 5.

[0035] According to the structure described above, while ensuring the strength of the reinforcing ring, it is avoided that the reinforcing ring 3 protrudes too much from the inner surface 13 of the housing. That is to say, the reinforcing ring 3 can protrude from the inner surface 13 of the housing, but the height cannot be too high, otherwise it will touch the electrode group and cause interference, etc. Therefore, the height difference h between the reinforcing ring 3 and the inner surface 13 of the main body 1 is within the range of -5 mm to 5 mm.

[0036] Among them, as Figure 5 shown, an example where h = 0 is given, that is to say, a structure where the reinforcing ring 3 is flush with the inner surface 13 of the main body 1 is given, which can also play the role of increasing the mechanical strength of the explosion-proof valve area. Of course, this is just an example.

[0037] Among them, as Figure 6 shown, a structure where the reinforcing ring 3 does not protrude from the inner surface 13 of the main body 1 is given. Of course, this is just an example.

[0038] In this embodiment, preferably, as Figure 4 shown, in the direction perpendicular to the first direction, the width of the reinforcing ring 3 is a, and the wall thickness of the main body 1 on the side of the explosion-proof valve 2 is t, and a ≥ 0.01t. According to the structure described above, if the ring width of the reinforcing ring 3 is too small, it cannot improve the mechanical strength of the explosion-proof valve area, that is, the strengthening effect is weak. Therefore, the ring width a of the reinforcing ring 3 is set such that a ≥ 0.01t. In this embodiment, preferably, as Figure 4 shown, in the direction perpendicular to the X-axis direction, the maximum distance between the reinforcing ring 3 and the explosion-proof valve 2 is c, and the wall thickness of the main body 1 on the side of the explosion-proof valve 2 is t, and 0 < c ≤ 5t. This can not only play a good role in increasing the mechanical strength of the explosion-proof valve area, but also does not occupy the space of the explosion-proof valve 2, that is to say, it will not reduce the size of the explosion-proof valve 2, and thus will not affect the exhaust during thermal runaway. Of course, it is not limited to this, and c > 5t can also be set.

[0039] In this embodiment, preferably, as Figure 4 shown, the number of explosion-proof valves 2 is one. Correspondingly, the number of reinforcing rings 3 is also one. Of course, this is not the only case. The number of explosion-proof valves 2 can also be multiple. And when the number of explosion-proof valves 2 is multiple, the number of reinforcing rings 3 is also multiple, and they correspond to the multiple reinforcing rings 3 one by one.

[0040] In this embodiment, preferably, as Figure 1 shown, the main body 1, that is, the housing, is a rectangular housing, and the housing has four faces. And the explosion-proof valve 2 is installed on one of the narrow side faces of the housing. This narrow side face is the side face formed by the long side and the wide side. Of course, this is not the only case. The number of faces included in the housing is not limited to four, and can also be more than four, such as five, etc. And it is only limited to setting the explosion-proof valve 2 on only one of the narrow side faces.

[0041] In summary, the explosion-proof valve bearing assembly provided by this application has the following structure and advantages: The main body 1 provided in this application can be the housing of the battery, and this will be taken as an example for illustration later. A reinforcing ring 3 is arranged on the outer periphery of the explosion-proof valve 2, which strengthens the overall mechanical strength of the explosion-proof valve area, can effectively resist deformation, and further ensure the stability of the explosion-proof valve 2, so that the explosion-proof valve 2 will not crack and leak liquid due to the deformation of the housing. Moreover, the reinforcing ring 3 is arranged on the outer periphery of the explosion-proof valve 2 and will not block the exhaust channel when the battery is out of control thermally. In addition, the reinforcing ring 3 is arranged on the inner side of the housing and does not protrude from the housing, reducing the occupied space and not easily interfering with the components outside the housing.

[0042] In addition, the main body 1, that is, the housing, forms an installation groove 11 that is recessed toward the side away from the electrode group of the battery. The reinforcing ring 3 is arranged in the installation groove 11 to avoid occupying too much space inside the electrode group and contribute to increasing the capacity of the battery.

[0043] In addition, an installation through-hole 12 is directly designed on the bottom wall of the installation groove 11. Then, when the explosion-proof valve 2 is installed into this installation through-hole 12, the reinforcing ring 3 located in the installation through-hole 12 can be arranged around the outer periphery of the explosion-proof valve 2.

[0044] In addition, the reinforcing ring 3 is connected to the main body 1 by welding or gluing, which is simple and convenient to operate. Of course, the reinforcing ring 3 can also be directly formed on the inner surface 13 of the housing by stamping, with higher production efficiency and no need for subsequent processing and manufacturing.

[0045] In addition, the reinforcing ring 3 can protrude from the installation groove 11 or not protrude from the installation groove 11, and the height difference between the reinforcing ring 3 and the inner surface 13 of the housing at the outer periphery of the notch of the installation groove 11 ranges from 0 to 5 mm, which can not only ensure the strengthening effect and improve the ability of the explosion-proof valve area to resist deformation, but also the space inside the housing is small, which helps to increase the capacity.

[0046] In summary, to verify the effectiveness of the solution, the solutions of different sizes were actually measured and verified. Let t = 1 mm, and the verification results are shown in Table 1 below: Combined with Table 1 below, it can be seen that the reinforcing ring 3 can protrude from the inner surface 13 of the housing, but the height cannot be too high, otherwise it will touch the electrode group and cause interference. Therefore, the height difference h between the reinforcing ring 3 and the inner surface 13 of the main body 1 is taken within the range of -5 mm to 5 mm; If the ring width of the reinforcing ring 3 is too small, it cannot improve the mechanical strength of the explosion-proof valve area, that is, the strengthening effect is weak. Therefore, the ring width a of the reinforcing ring 3 is set to a≥0.01t; In the direction perpendicular to the X-axis, the maximum distance between the reinforcing ring 3 and the explosion-proof valve 2 is c, the wall thickness of the main body 1 on the side of the explosion-proof valve 2 is t, and 0 < c ≤ 5t. This can not only play a good role in increasing the mechanical strength of the explosion-proof valve area, but also does not occupy the space of the explosion-proof valve 2. That is to say, it will not reduce the size of the explosion-proof valve 2, and thus will not affect the exhaust during thermal runaway; It should be noted that: the value of t is not limited to 1 mm, and other values can also be taken, etc. Preferably, t can be taken within the range of 0.01 mm to 10 mm. Of course, it is not limited to this, and it can also be greater than 10 mm or less than 0.01 mm, and the specific value can be selected according to actual needs.

[0047] Table 1

[0048] Embodiment 2 Embodiment 2 of the present application further provides a battery, including the explosion-proof valve bearing assembly described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of this explosion-proof valve bearing assembly, and the same technical features and beneficial effects will not be repeated.

[0049] It should be noted that: the number of explosion-proof valve bearing assemblies is one, and the main body 1 of the explosion-proof valve bearing assembly is the housing of the battery or the cover plate of the battery.

[0050] Of course, it is not limited to this. When the number of explosion-proof valve bearing assemblies is two, one of the main bodies 1 of the explosion-proof valve bearing assemblies is the housing of the battery, and the other main body 1 of the explosion-proof valve bearing assembly is the cover plate of the battery. It can be seen that in any case, the foregoing arrangement of the reinforcing ring 3 around the explosion-proof valve 2 strengthens the overall mechanical strength of the explosion-proof valve area, can effectively resist deformation, and thus ensures the stability of the explosion-proof valve 2, so that the explosion-proof valve 2 will not crack and leak due to the deformation of the housing.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An explosion-proof valve bearing assembly, characterized in that: include: A main body, an explosion-proof valve and a reinforcement ring; wherein, along the X-axis direction, the main body is formed with mounting holes running through both sides thereof, and the explosion-proof valve is installed in the mounting holes; the main body is provided with a reinforcement ring located outside the explosion-proof valve and extending along the circumferential direction, and along the X-axis direction, the reinforcement ring is arranged on one side of the main body close to the pole group of the battery.

2. The explosion-proof valve bearing assembly according to claim 1, characterized in that: The main body is formed with a mounting groove which is recessed toward a side away from the pole group of the battery, and the reinforcement ring is arranged in the mounting groove.

3. The explosion-proof valve bearing assembly according to claim 2, characterized in that: The mounting through hole is formed on the bottom wall of the mounting groove along the X-axis direction.

4. The explosion-proof valve bearing assembly according to claim 1, characterized in that: The reinforcement ring is connected to the main body by welding.

5. The explosion-proof valve bearing assembly according to claim 1, characterized in that: The reinforcement ring is connected to the main body by gluing.

6. The explosion-proof valve bearing assembly according to claim 1, characterized in that: The reinforcement ring is formed on the main body by stamping.

7. The explosion-proof valve bearing assembly according to claim 1, characterized in that: Along the X-axis direction, a height difference between the reinforcement ring and the inner surface of the main body is h, and -5mm≤h≤5mm.

8. The explosion-proof valve bearing assembly according to claim 1, characterized in that: In the Y-axis direction perpendicular to the X-axis direction, the width of the reinforcement ring is a, the wall thickness of the main body of the explosion-proof valve side is t, and a≥0.01t.

9. The explosion-proof valve bearing assembly according to any one of claims 1 to 8, characterized in that: In the Y-axis direction perpendicular to the X-axis direction, the maximum distance between the reinforcement ring and the explosion-proof valve is c, the wall thickness of the main body of the explosion-proof valve side is t, and 0 <c≤5t。 10. A battery, characterized in that: The explosion-proof valve bearing assembly comprises the explosion-proof valve bearing assembly according to any one of claims 1 to 9.

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