Explosion-proof valve and power battery
By adopting a dual-zone explosion-proof structure and a soft metal material design in the explosion-proof valve, the problem of high failure probability of the explosion-proof valve is solved, and the safe and reliable operation and life extension of the power battery are achieved.
Patent Information
- Application Number
- CN202423323263.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing explosion-proof valves have a high failure rate in power batteries, failing to release internal pressure in a timely manner and increasing safety risks.
Design an explosion-proof valve with a dual-zone explosion-proof structure, including a first explosion-proof section and a second explosion-proof section. The first explosion-proof section is the commonly used explosion-proof zone, and the second explosion-proof section is the backup explosion-proof zone. Soft metal is selected as the material to enhance reliability, and the thermal conductivity is reduced by setting an annular groove and a convex structure on the valve body.
It significantly reduces the probability of explosion-proof valve failure, ensures timely release of internal pressure in the power battery, improves safety and reliability, extends battery life, and reduces maintenance costs.
Smart Images
Figure CN223858370U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of pressure relief valves, and more particularly to an explosion-proof valve and a power battery. Background Technology
[0002] In modern electric vehicles and other electric devices, the power battery plays a crucial role as a core component. However, during use, excessive pressure can accumulate inside the battery due to various reasons, such as overcharging, short circuits, or excessively high ambient temperatures. When the internal pressure of the power battery exceeds its design tolerance, a pressure overload occurs. This can not only cause the battery casing to deform and rupture, but also lead to electrolyte leakage between cells, causing internal short circuits and potentially resulting in serious accidents such as fires or even explosions. Furthermore, high pressure can negatively impact the battery's electrochemical performance, shorten its lifespan, and threaten the integrity of surrounding electronic components and structures. Therefore, ensuring the safe operation of power batteries under various working conditions is of paramount importance.
[0003] To address the aforementioned issues, a critical safety device—an explosion-proof valve—is incorporated into the design of power batteries. Installed on the top cover of the power battery, this device serves as a preventative measure, automatically responding when the internal pressure reaches a preset safety threshold. Specifically, when an abnormally high internal pressure is detected, the explosion-proof valve undergoes a structural change due to the pressure from within—typically bursting or opening through a weakened area—to create a pressure relief port and release excess pressure. This mechanism effectively prevents potential dangers caused by excessive internal pressure, protecting the lives and property of users, while also helping to maintain the normal operation of the battery system and reducing the likelihood of accidents.
[0004] While existing explosion-proof valve technology has improved the safety of power batteries to some extent, it still has some shortcomings. In particular, when the explosion-proof valve itself malfunctions, such as due to manufacturing defects or damage caused by external factors, it may lose its intended function and fail to perform the expected explosion operation. This would prevent the timely and effective release of pressure inside the power battery, increasing the risk of system instability and even more serious accidents. Therefore, developing a technical solution that can significantly reduce the probability of explosion-proof valve failure due to malfunction is particularly urgent. Summary of the Invention
[0005] This application provides an explosion-proof valve and a power battery, solving the technical problem of high failure probability when the explosion-proof valve is installed on the top cover plate of the power battery. The technical solution is as follows:
[0006] In a first aspect, embodiments of this application provide an explosion-proof valve, including: a valve body for mounting on a power battery; the valve body is provided with two explosion-proof structures, the structural strength of the explosion-proof structures being weaker than the structural strength of the rest of the valve body;
[0007] Both explosion-proof structures are annular, forming a first explosion-proof part and a second explosion-proof part on the valve body respectively. When the explosion-proof structure is in a broken state, at least one of the first explosion-proof part and the second explosion-proof part will separate from the valve body.
[0008] In one embodiment, the area of the second explosion-proof part is smaller than the area of the first explosion-proof part, and the second explosion-proof part is disposed in the first explosion-proof part.
[0009] In one embodiment, the valve body has a first surface and a second surface opposite to the first surface;
[0010] Two annular grooves are formed on the first surface to create an explosion-proof structure between the bottom of the annular grooves and the second surface.
[0011] In one embodiment, the annular groove is a straight groove, and the groove body of the annular groove is configured as a wedge shape that gradually expands in size from the bottom to the opening.
[0012] In one embodiment, the valve body includes: a first part, wherein a first explosion-proof part and a second explosion-proof part are located on the first part; and a second part, which is connected to the first part and is an annular shape surrounding the outer periphery of the first part, for connection to a top cover plate on the power battery.
[0013] In one embodiment, a raised rib structure is also provided on the surface of the valve body, the raised rib structure being located between the first part and the second part, for weakening the thermal conductivity of the valve body.
[0014] In one embodiment, the thickness of the first part is less than the thickness of the second part, so that the height difference between the second part and the first part forms a ribbed structure; or, the thickness of the first part is greater than the thickness of the second part, so that the height difference between the first part and the second part forms a ribbed structure.
[0015] In one embodiment, a buffer groove is provided on the second part. The buffer groove is annular and is used to reduce the thermal conductivity of the valve body.
[0016] The number of buffer grooves is at least two, and each buffer groove is arranged in pairs on the first and second surfaces of the valve body.
[0017] Secondly, this application provides a power battery, including: a top cover plate with an installation hole that can communicate with the interior of the power battery; and the aforementioned explosion-proof valve; a second part of the explosion-proof valve is connected to the top cover plate to cover the installation hole through the explosion-proof valve.
[0018] Compared with existing technologies, this application proposes a design for an explosion-proof valve and a power battery. By setting a first explosion-proof section (normal explosion zone) and a second explosion-proof section (backup explosion zone) on the valve body, the functionality and reliability of the explosion-proof valve are significantly enhanced. It has several outstanding advantages: The dual-zone design proposed in this application allows the backup explosion zone to immediately take over in the event of failure of the normal explosion zone, ensuring timely release of internal pressure in the power battery and effectively reducing safety risks caused by explosion-proof valve failure. This innovative explosion-proof valve structure not only solves potential safety hazards from a technical perspective but also provides users with more reliable protection. Consumers can use power battery products equipped with such explosion-proof valves with greater peace of mind, which is of great significance for promoting the healthy development of industries such as new energy vehicles; it also effectively controls the internal pressure level of the power battery, helping to reduce damage to the cells and other components caused by abnormal high pressure, thereby helping to extend the overall battery life and reduce maintenance costs.
[0019] In summary, this application proposes a design scheme for an explosion-proof valve and a power battery. By optimizing the structure of the traditional explosion-proof valve, it achieves higher safety performance and more stable operation, providing a more solid guarantee for the safety of users' lives and property, and also promoting the progress and development of related technical fields.
[0020] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description
[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.
[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the explosion-proof valve proposed in Embodiment 1 of this application;
[0023] Figure 2 This is a schematic diagram of the second embodiment of the explosion-proof valve proposed in Embodiment 1 of this application;
[0024] Figure 3 for Figure 1 AA section view;
[0025] Figure 4This is a schematic diagram of the structure of the power battery top cover proposed in Embodiment 2 of this application;
[0026] Figure 5 for Figure 4 BB cross-sectional view.
[0027] Figure label:
[0028] 1. Valve body;
[0029] 11. Part One; 12. Part Two;
[0030] 100. Raised rib structure; 110. Annular groove; 111. First explosion-proof part; 112. Second explosion-proof part; 120. Buffer groove;
[0031] 2. Top cover plate;
[0032] 20. Mounting holes. Detailed Implementation
[0033] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0034] Explosion-proof valves are an important means for power batteries to deal with emergencies. Their technical principle is that when the internal pressure of the power battery reaches a set threshold, the explosion-proof valve bursts under the pressure of the internal pressure of the power battery, forming a pressure relief port that can release the internal pressure of the power battery and prevent more serious failures caused by internal pressure overload during use.
[0035] Reference Figures 1 to 5 As shown, an explosion-proof valve is proposed in Embodiment 1 of this application. The explosion-proof valve may include: a valve body 1 for mounting on a power battery; the valve body 1 is provided with two explosion-proof structures, the structural strength of which is weaker than the structural strength of the rest of the valve body 1.
[0036] Both explosion-proof structures are annular, forming a first explosion-proof part 111 and a second explosion-proof part 112 on the valve body 1 respectively. When the explosion-proof structure is in a broken state, at least one of the first explosion-proof part 111 and the second explosion-proof part 112 separates from the valve body 1.
[0037] Specifically, in some embodiments of the technical solution adopted in this application, the explosion-proof valve typically includes a valve body 1 that can be welded to the top cover plate 2 of the power battery, specifically installed on the mounting hole 20 of the top cover plate 2, which can communicate with the internal space of the power battery. The key technical point of this application is that the valve body 1 is provided with two explosion-proof structures, both of which are annular. These two explosion-proof structures enclose a first explosion-proof part 111 and a second explosion-proof part 112 on the valve body 1. In this embodiment, the two explosion-proof structures can change the structural strength of a portion of the valve body 1. Therefore, the first explosion-proof part 111 and the second explosion-proof part 112 can serve as a commonly used explosion-proof area and a spare explosion-proof area on the valve body 1. For example, the first explosion-proof part 111 is the commonly used explosion-proof area of the valve body 1, and the second explosion-proof part 112 is the spare explosion-proof area of the valve body 1. When the internal pressure of the power battery reaches or exceeds a set threshold, the valve body 1 can be squeezed and burst through the first explosion-proof part 111 by the internal pressure of the power battery to form a pressure relief port. If the first explosion-proof part 111 malfunctions and cannot burst normally by squeezing, the internal pressure of the power battery can be released by bursting through the second explosion-proof part 112. This effectively reduces the probability of explosion-proof valve failure, making the power battery safer and more reliable during use, and providing users with a more secure user experience.
[0038] In some embodiments, the explosion-proof structure may be made of a material with a structural strength weaker than that of the valve body 1. For example, the valve body 1 may be made of MFX2-0 material with a thickness adjusted to 0.5 mm. It should be noted that MFX2 is currently a high-performance, highly formable aluminum material. MFX2 has an elongation of up to 40% and good machinability.
[0039] For explosion-proof structures, other relatively soft metals can be used, such as: tin, which utilizes its low melting point (approximately 231.9 degrees Celsius) by simultaneously heating tin and the MFX2-0 state material above tin's melting point. In the liquid state, through stirring or a special mold design, the tin evenly coats or permeates the MFX2-0 state material, and after cooling, the two fuse well together; lead, which utilizes its softness and relatively low melting point (approximately 327.5 degrees Celsius) and can be fused with the MFX2-0 state material through metallurgical processes (such as die casting and melting) at suitable processing temperatures; indium, a soft metal with good ductility, melts at relatively low temperatures (melting point approximately 156.61 degrees Celsius), making its fusion process less temperature-sensitive; and cadmium, with a melting point of approximately 320.9 degrees Celsius, can be fused with the MFX2-0 state material through methods similar to casting or powder metallurgy.
[0040] In some embodiments, a groove can be opened at the target position of the valve body 1, or a cavity formed in the internal structure of the valve body 1 can be provided at the target position of the valve body 1, so that the structural strength of the valve body 1 at the target position is weaker than the structural strength of the valve body 1 at other positions, thereby forming an explosion-proof structure on the surface of the valve body 1 or in the internal structure of the valve body 1 that is easy to be blasted.
[0041] Reference Figure 2 As shown, in some embodiments, the first explosion-proof part 111 and the second explosion-proof part 112 are arranged side by side on the valve body 1, meaning that the first explosion-proof part 111 and the second explosion-proof part 112 are independent regions. In this embodiment, the range of the first explosion-proof part 111 can be the same as the range of the second explosion-proof part 112, meaning that the pressure relief ports formed by the first explosion-proof part 111 and the second explosion-proof part 112 are of the same size. This can be understood as the partial stripping of the valve body 1 structure on the first explosion-proof part 111 and the partial stripping of the valve body 1 structure on the second explosion-proof part 112 can respectively form pressure relief ports of the same size, which can be interpreted as the two pressure relief ports having the same pressure relief performance. In the modified structure of this embodiment, the two explosion-proof structures can partially overlap, and the two non-overlapping parts are the first explosion-proof part 111 and the second explosion-proof part 112, while the overlapping part can form a third explosion-proof part on the valve body 1. This third explosion-proof part can serve as a commonly used explosion-proof area on the explosion-proof valve or as a backup explosion-proof area.
[0042] Furthermore, refer to Figure 1 As shown, in some embodiments, the area of the second explosion-proof part 112 is smaller than the area of the first explosion-proof part 111, and the second explosion-proof part 112 is located in the first explosion-proof part 111.
[0043] Specifically, in some embodiments of the technical solution adopted in this application, the area of the second explosion-proof part 112 can be set to be smaller than the area of the first explosion-proof part 111. This can be interpreted as the first explosion-proof part 111 occupying a larger area of the valve body 1 surface area compared to the second explosion-proof part 112. The second explosion-proof part 112 is placed in the first explosion-proof part 111. Thus, when the first explosion-proof part 111, which is used for blasting, does not malfunction, a larger pressure relief port can be formed by peeling off a portion of the valve body 1 structure on the first explosion-proof part 111, so that the internal pressure of the power battery can be released more quickly. Therefore, in the absence of a malfunction, the explosion-proof valve in this embodiment has a more objective pressure relief performance than the explosion-proof valve with the first explosion-proof part 111 and the second explosion-proof part 112 arranged in parallel in the above embodiment. When a portion of the valve body 1 structure on the first explosion-proof part 111 malfunctions and cannot be properly detached from the valve body 1, the internal pressure of the power battery can be released by peeling off a portion of the valve body 1 structure on the second explosion-proof part 112 to form a pressure relief port.
[0044] Furthermore, refer to Figure 1 , Figure 2 and Figure 3 As shown, in some preferred embodiments, the valve body 1 has a first surface and a second surface opposite to the first surface; two annular grooves 110 are formed on the first surface to form an explosion-proof structure between the bottom of the annular grooves 110 and the second surface.
[0045] Specifically, in the technical solution adopted in this application, in this embodiment, an annular groove is formed on the valve body 1 to create an explosion-proof structure that can reduce the structural strength of part of the valve body 1. The first surface and the second surface of the valve body 1 can be the surfaces of the explosion-proof valve exposed on the outside and inside of the power battery, respectively. For example, the first surface can be exposed on the outside of the power battery through the mounting hole 20 on the top cover plate 2, while the second surface can be exposed on the inside of the power battery through the mounting hole 20 on the top cover plate 2.
[0046] Furthermore, in some preferred embodiments, the annular groove 110 is a straight groove, and the groove body of the annular groove 110 is configured as a wedge shape that gradually expands in size from the bottom of the groove to the opening.
[0047] Specifically, in some embodiments of the technical solution adopted in this application, the surface of the valve body 1 can be configured to adapt to the shape of the power battery, such as an ellipse, so that a larger first explosion-proof part 111 and a second explosion-proof part 112 can be formed on the valve body 1 by the annular groove 110. In order to better adapt to the elliptical surface on the valve body 1, the annular groove 110 can be configured as a straight groove. In this embodiment, the groove of the annular groove 110 can be configured as a wedge shape. The wedge-shaped groove is formed by gradually expanding the size from the bottom of the annular groove 110 to the opening. When the extrusion pressure is formed on the valve body 1, the breakthrough point can be better concentrated at the position of the annular groove 110. However, it has been found in the production process that if the expansion angle of the annular groove 110 is too large, it will cause the first explosion-proof part 111 and / or the second explosion-proof part 112 to bulge and deform. At the same time, if the thickness reserved at the valve body 1 where the annular groove 110 is opened is too thin, it may cause the bottom of the annular groove 110 to be damaged before the internal pressure of the power battery reaches the threshold. Therefore, in this embodiment, it is known from measurements that the included angle formed between the two opposite groove walls and the bottom of the groove in the annular groove 110 can be set to an obtuse angle of 120±2 degrees; and the reserved thickness at the valve body 1 position where the annular groove 110 is opened is set to 0.05±0.01mm, so that when the internal pressure of the power battery reaches the set threshold, the first explosion-proof part 111 or the second explosion-proof part 112 will automatically explode to release the pressure of the power battery.
[0048] Furthermore, refer to Figure 1 and Figure 2As shown, in some embodiments, the valve body 1 includes: a first part 11, a first explosion-proof part 111 and a second explosion-proof part 112 located on the first part 11; and a second part 12 connected to the first part 11, wherein the second part 12 is configured as an annulus surrounding the outer periphery of the first part 11 for connection to the top cover plate 2 on the power battery.
[0049] Specifically, in some embodiments of the technical solution adopted in this application, the valve body 1 can be divided into a part for connecting with the top cover plate 2 and a part for supporting the annular groove 110. For ease of reference later, the part for supporting the annular groove 110 can be defined as the first part 11, and the part for connecting with the top cover plate 2 can be defined as the second part 12. In this embodiment, since both annular grooves 110 are opened on the surface of the first part 11, the first explosion-proof part 111 and the second explosion-proof part 112 formed by the annular grooves 110 are also located on the first part 11. The second part 12 is connected to the first part 11, specifically connected to the outer peripheral edge of the first part 11. The second part 12 is designed to be annular enough to surround the outer periphery of the first part 11. Thus, when the second part 12 is connected to the top cover plate 2, the outer periphery of the second part 12 can be welded to the top cover plate 2 so that the explosion-proof valve can completely cover the mounting hole 20 on the top cover plate 2.
[0050] Furthermore, in some embodiments, the surface of the valve body 1 is also provided with a first heat-resistant texture and a second heat-resistant texture to reduce the thermal conductivity of the valve body 1.
[0051] Specifically, in some embodiments of the technical solution adopted in this application, welding on the valve body 1 generates temperatures exceeding 300 degrees Celsius. When thermal shock occurs on the explosion-proof valve, it affects its burst value; therefore, it is necessary to block some of the high temperatures generated during welding. In this embodiment, a first heat-resistant texture and a second heat-resistant texture are provided on the outer surface of the valve body 1 to weaken the thermal conductivity of the valve body 1. The first heat-resistant texture can be a protrusion or pit on the surface of the valve body 1, or other structures that can weaken the thermal conductivity of the valve body 1, thereby disrupting the flatness of the valve body 1 surface and reducing the overall thermal conductivity of the valve body 1. The technical principle is that heat conduction in solids is mainly achieved through lattice vibration (phonon conduction) and the movement of free electrons. When the surface is flat, the heat conduction path is relatively direct and continuous. However, when protrusions or grooves are provided on the surface, the heat conduction path is interrupted.
[0052] Furthermore, refer to Figure 3 As shown, in some embodiments, a ribbed structure 100 is also provided on the surface of the valve body 1. The ribbed structure 100 is located between the first part 11 and the second part 12, and is used to weaken the thermal conductivity of the valve body 1.
[0053] Furthermore, refer to Figure 3 As shown, in some embodiments, the thickness of the first part 11 is less than the thickness of the second part 12, so that the height difference between the second part 12 and the first part 11 forms the rib structure 100; or, the thickness of the first part 11 is greater than the thickness of the second part 12, so that the height difference between the first part 11 and the second part 12 forms the rib structure 100.
[0054] Specifically, in one embodiment of the technical solution adopted in this application, the first heat-resistant texture can be a raised rib structure 100 disposed on the surface of the valve body 1. The raised rib structure 100 is formed by the thickness difference between the first part 11 and the second part 12. For example, the thickness of the first part 11 is less than the thickness of the second part 12, or the thickness of the first part 11 is greater than the thickness of the second part 12. In a further embodiment, a groove can also be formed on the surface of the valve body 1 to form the raised rib structure 100, that is, the groove wall. The groove projection can be adapted to the first part 11, and the design concept of the thickness of the first part 11 being less than the thickness of the second part 12 can also be achieved.
[0055] Furthermore, refer to Figure 3 As shown, in some embodiments, a buffer groove 120 is provided on the second part 12. The buffer groove 120 is annular and is used to weaken the thermal conductivity of the valve body 1.
[0056] Specifically, in one embodiment of the technical solution adopted in this application, the second heat-insulating texture can be a buffer groove 120 formed on the second part 12. The buffer groove 120 is set as an annular shape to form a closed-loop structure around the surface of the second part 12, thereby destroying the flatness of the surface of the second part 12 to achieve the heat-insulating effect.
[0057] Furthermore, refer to Figure 3 As shown, in some embodiments, the number of buffer grooves 120 is at least two, and each buffer groove 120 is arranged in pairs on the first surface and the second surface of the valve body 1.
[0058] Specifically, in a further embodiment of the technical solution adopted in this application, two or more buffer grooves 120 can be provided on the second part 12. Each buffer groove 120 can be in pairs, with the two buffer grooves 120 in the same group located on opposite surfaces of the second part 12, namely the first surface and the second surface of the valve body 1. The two buffer grooves 120 are arranged opposite each other, thereby releasing some of the stress applied to the valve body 1 through the two opposing buffer grooves 120. During the production process, the top cover plate 2 of the power battery may undergo bending deformation, which may affect the explosion-proof valve. Specifically, the bending deformation of the top cover plate 2 during production will stretch and deform the explosion-proof valve's bursting marks, thus affecting the normal bursting of the explosion-proof valve. However, after adding buffer grooves 120 to the second part 12, the stress generated by the bending deformation of the top cover plate 2 is directly released by the buffer grooves, thus effectively avoiding the adverse effects of the bending deformation of the top cover plate 2 during production on the explosion-proof valve. In this embodiment, the groove of the buffer groove 120 can be set as V-shaped with an angle of 90 degrees, and the groove depth can be controlled between 0.1 and 0.15 mm. It can be seen from the measurement that when the groove depth of the buffer groove 120 is less than 0.1 mm, the heat blocking effect is not obvious, while when the groove depth of the buffer groove 120 is greater than 0.15 mm, it will lead to insufficient structural strength of the second part 12, which is prone to deformation and twisting.
[0059] Reference Figure 4 and Figure 5 As shown, in Embodiment 2 of this application, a power battery is also proposed, which may include: a top cover plate 2, on which an installation hole 20 is provided that can communicate with the interior of the power battery; and an explosion-proof valve proposed in Embodiment 1 above; the second part 12 of the explosion-proof valve is connected to the top cover plate 2 so as to cover the installation hole 20 through the explosion-proof valve.
[0060] Specifically, in some embodiments of the technical solution adopted in this application, the mounting hole 20 on the top cover plate 2 can communicate with the cavity of the power battery used to store internal pressure. Installing the explosion-proof valve on this mounting hole 20 can relieve the overload pressure inside the power battery when the internal pressure reaches a set threshold. The specific structure and working principle of the explosion-proof valve can be referred to in Embodiment 1 above, and therefore will not be repeated here.
[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.
[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0063] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.
[0064] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).
[0065] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. All or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware, the program being stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.
[0066] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. This storage medium can be a read-only memory, a disk, or an optical disk, etc.
[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An explosion relief valve, characterized in that The utility model relates to a valve body (1) for installing on power battery, two explosion -proof structures are equipped on the valve body (1), the structural strength of the explosion -proof structure is weak than the structural strength of the rest part valve body (1), wherein, two the explosion -proof structure is annular, to constitute first explosion -proof portion (111) and second explosion -proof portion (112) respectively on the valve body (1), when the explosion -proof structure is in the fracture state, at least one of first explosion -proof portion (111) and second explosion -proof portion (112) is separated from the valve body (1).
2. The explosion-proof valve according to claim 1, wherein The area of the second explosion-proof portion (112) is smaller than that of the first explosion-proof portion (111), and the second explosion-proof portion (112) is arranged in the first explosion-proof portion (111).
3. The explosion-proof valve according to claim 1 or 2, wherein The valve body (1) has a first surface and a second surface opposite to the first surface, two annular grooves (110) are formed on the first surface to form the explosion-proof structure between the groove bottom of the annular groove (110) and the second surface.
4. The explosion-proof valve according to claim 3, wherein The annular groove (110) is a straight slot, and the groove body of the annular groove (110) is wedge-shaped, gradually expanding in size from the groove bottom to the slot opening. The valve body (1) comprises: A first portion (11), on which the first explosion-proof portion (111) and the second explosion-proof portion (112) are located; A second portion (12) connected with the first portion (11), and the second portion (12) is annular and encloses the outer periphery of the first portion (11), and is used for connecting with a top cover plate (2) on the power battery.
6. The explosion-proof valve according to claim 5, wherein 5. The explosion relief valve of claim 1, wherein A convex ridge structure (100) is further arranged on the surface of the valve body (1), the convex ridge structure (100) is located between the first portion (11) and the second portion (12), and is used for weakening the heat conduction performance of the valve body (1).
7. The explosion-proof valve according to claim 6, wherein The thickness of the first portion (11) is smaller than that of the second portion (12), so that the convex ridge structure (100) is formed by the height difference between the second portion (12) and the first portion (11); or The thickness of the first portion (11) is greater than that of the second portion (12), so that the convex ridge structure (100) is formed by the height difference between the first portion (11) and the second portion (12).
8. The explosion-proof valve according to claim 5 or 6, wherein A buffer groove (120) is formed on the second portion (12), the buffer groove (120) is annular, and is used for weakening the heat conduction performance of the valve body (1).
9. The explosion-proof valve according to claim 8, wherein The number of the buffer grooves (120) is at least two, and each pair of the buffer grooves (120) is oppositely arranged on the first surface and the second surface of the valve body (1). 10. A power cell, characterized by Comprising: a top cover plate (2) having a mounting hole (20) capable of communicating the inside of the power battery; and The explosion-proof valve according to any one of claims 1 to 9; The second part (12) of the explosion-proof valve is connected with the top cover plate (2) to cover the mounting hole (20) through the explosion-proof valve.