Battery and electric device

Abstract

The embodiment of the utility model provides a battery and a power utilization device, the battery comprises a box body and an anti-explosion valve, and the anti-explosion valve comprises a valve body, a valve cover, a first magnetic attraction part and a second magnetic attraction part; the box body is provided with a pressure relief hole, and the pressure relief hole is communicated with a battery cavity in the box body; a valve body of the explosion-proof valve is mounted at the pressure relief hole of the box body, and is provided with a valve body hollow part communicated with the pressure relief hole and an exhaust port communicated with the valve body hollow part; the valve cover is arranged at the exhaust port to be in a closed state for closing the exhaust port when the initial position and the pressure of gas in the battery cavity are smaller than preset pressure; the first magnetic part is mounted on the valve cover, and the second magnetic part is mounted on the valve body; in the closed state of the valve cover, preset attraction force exists between the first magnetic attraction piece and the second magnetic attraction piece, and when the pressure of gas in the battery cavity is larger than or equal to preset pressure, the valve cover is configured to overcome the preset attraction force to be separated from the exhaust port under the action of the pressure of the battery cavity so as to be switched to the opening state of opening the exhaust port. The power utilization device comprises the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery and an electrical device. Background Technology

[0002] During battery use, thermal runaway may occur due to factors such as overcharging, short circuits, and high temperatures. In this situation, the internal chemical reactions of the battery accelerate, and the temperature rises sharply. To prevent battery combustion or explosion accidents, the battery casing is usually equipped with a pressure relief vent, and an explosion-proof valve is installed at the pressure relief vent. The explosion-proof valve in this technology has multiple components at the vent port for assembling the valve body and valve cover. These components occupy a large amount of space in the vent port. When the battery needs to release pressure, these components can obstruct the venting, preventing the timely release of the instantaneous energy generated by thermal runaway of the battery pack, thus posing a potential safety risk.

[0003] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Summary of the Invention

[0004] This application provides a battery and an electrical device.

[0005] In a first aspect, this application provides a battery, comprising:

[0006] The casing has a pressure relief vent, which is connected to the battery compartment inside the casing; and

[0007] Explosion-proof valves, including:

[0008] The valve body is installed at the pressure relief hole of the housing. The valve body has a hollow part that connects to the pressure relief hole and an exhaust port that connects to the hollow part of the valve body.

[0009] The valve cover is positioned at the exhaust port in the initial position and when the gas pressure in the battery cavity is less than the preset pressure, so as to be in a closed state that seals the exhaust port.

[0010] The first magnetic element is installed on the valve cover; and

[0011] The second magnetic attraction element is installed on the valve body;

[0012] In the closed state of the valve cover, there is a preset attraction between the first magnetic attractor and the second magnetic attractor. When the pressure of the gas in the battery cavity is greater than or equal to the preset pressure, the valve cover is configured to overcome the preset attraction and separate from the exhaust port under the action of the pressure in the battery cavity to switch to the open state of opening the exhaust port.

[0013] The pre-set attraction between the first and second magnetic components ensures the valve cover is pressed against the valve body, guaranteeing the sealing performance of the explosion-proof valve in the closed state. Compared to related technologies that use elastic components (such as springs) to seal the valve cover and valve body, this application uses the attraction (magnetic force) between magnetic components for constraint. This avoids the problems of aging, decreased reliability, or even failure of elastic components due to prolonged stress, thus improving the operational reliability of the explosion-proof valve. Furthermore, the installation of the magnetic components does not require additional loading structures (such as guide rods or limiting bosses at the vent), effectively simplifying the internal structural design of the explosion-proof valve and saving design and manufacturing costs. In addition, the reduction in loading structures provides ample space at the vent for venting, ensuring that the explosion-proof valve can vent gas in a timely and efficient manner when the gas pressure inside the battery chamber rises sharply, thereby ensuring the safety of the battery operation. Once the pressure inside the battery chamber returns to normal, the attraction between the first and second magnetic components allows the valve cover to fall back to the exhaust port for automatic reset, enabling the explosion-proof valve to be put back into use and saving the cost of manual maintenance and reset of the explosion-proof valve.

[0014] In some embodiments, the first magnetic attractor and the second magnetic attractor have the same or similar shapes.

[0015] Compared to two magnetic chucks of different shapes, the magnetic lines of force between two first and second magnetic chucks of the same or similar shapes can be distributed more evenly, resulting in a more balanced distribution of attractive forces between corresponding positions on the first and second magnetic chucks. On the one hand, this helps ensure that the valve cover is evenly stressed when closed, achieving better sealing. On the other hand, during the valve cover's repositioning process relative to the valve body, it helps the valve cover to more easily align with the exhaust port, thus achieving accurate repositioning.

[0016] In some embodiments, the first magnetic member and / or the second magnetic member have a ring-shaped structure.

[0017] The annular structure provides circumferentially distributed attraction, helping to ensure a circumferential seal for the valve cover when closed. Furthermore, during valve cover reset, the annular first and second magnetic attractors form a natural center alignment guide, enabling accurate valve cover reset. Additionally, the annular structure can be arranged around the exhaust port without obstructing the exhaust path within the port, further improving exhaust efficiency.

[0018] In some embodiments, the outer edge of the projection of the first magnetic member onto the valve cover has a circumferentially uniform interval with the outer edge of the valve cover.

[0019] This design allows the first magnetic attractor and the valve cover to be aligned. Under the attraction between the first and second magnetic attractors, the valve cover can be subjected to a uniform circumferential force, which can avoid deformation or poor sealing caused by local stress concentration and improve the working reliability of the explosion-proof valve.

[0020] In some embodiments, the explosion-proof valve further includes a limiting structure connected between the valve body and the valve cover to limit the distance between the valve body and the valve cover to a preset distance when the valve cover is open.

[0021] The limiting structure helps prevent the valve cover from being ejected from the valve body under the pressure inside the battery cavity, thus preventing it from impacting other components or equipment around the explosion-proof valve. This is especially important in cases of sudden changes in pressure inside the battery cavity, which can effectively increase the safety of the system.

[0022] In some embodiments, the limiting structure includes a sliding rod disposed on the side of the valve cover facing the valve body and a mating part disposed in the hollow part of the valve body. The mating part is provided with a groove, the sliding rod is inserted into the groove, the outer periphery of the sliding rod is provided with a protruding locking part, the inner wall of the groove is provided with a protruding blocking part, and the locking part is located on the side of the blocking part away from the valve cover. In the open state of the valve cover, the blocking part and the locking part cooperate to restrict the sliding rod at least partially in the groove.

[0023] The slide groove accommodates and guides the sliding rod, ensuring stable movement of the valve cover during opening and closing. This prevents jamming caused by directional misalignment, facilitating efficient opening and resetting of the valve cover and improving the response speed of the explosion-proof valve. The blocking portion on the inner wall of the slide groove hinders the movement of the sliding rod, slowing the valve cover's opening speed and reducing potential impact. It also limits the maximum travel distance of the sliding rod, preventing the valve cover from detaching, flying off the valve body, and colliding with it.

[0024] In some embodiments, the first magnetic member is adhered to the side of the valve cover facing the valve body; and / or the side of the valve cover facing the valve body has a recess, in which the first magnetic member is embedded.

[0025] Direct bonding is less restricted by the specifications and shape of the valve cover, which facilitates the rapid installation of the first magnetic component and improves production efficiency. Furthermore, the bonding position of the first magnetic component can be flexibly adjusted as needed to achieve the desired attraction force distribution and adapt to different design requirements.

[0026] Embedded installation provides reliable protection, reduces external impacts or scratches on the first magnetic component, extends its service life, and makes the first magnetic component less likely to shift or fall off due to vibration or other external forces, which is especially reliable in dynamic working environments.

[0027] In some embodiments, the first magnetic member has an annular structure, and at least two support portions are provided on the side of the valve cover facing the valve body, arranged circumferentially along the valve cover. A groove is provided on the side of the support portion away from the center of the valve cover. The first magnetic member is sleeved on the outer periphery of the at least two support portions and is at least partially embedded in the groove.

[0028] The groove allows for the positioning and fixation of the first magnetic component, ensuring reliable installation.

[0029] In addition, the support provides greater flexibility in the installation position of the first magnetic component. By adjusting the position of the groove on the axial direction of the exhaust port, the distance between the first and second magnetic components can be adjusted, thereby providing different preset attraction forces when the valve cover is in the initial position, to meet the design requirements of explosion-proof valves of different specifications.

[0030] In some embodiments, the first magnetic member has a notch corresponding to the support portion on the side near the support portion, so that the first magnetic member can be sleeved onto the outer periphery of at least two support portions through the notch.

[0031] During the process of fitting the first magnetic component onto the outer periphery of at least two supports, by aligning the notch with one support, sufficient installation leeway can be left on the inner side of the first magnetic component, which helps to reduce the expansion and pulling of the first magnetic component during installation, so as to avoid damage to the first magnetic component.

[0032] In some embodiments, the second magnetic attractor has an annular structure, and the explosion-proof valve further includes a first sealing ring disposed between the valve body and the housing. The side of the valve body away from the valve cover is provided with a mounting groove for installing the first sealing ring, and the second magnetic attractor is installed in the mounting groove.

[0033] Integrating the second magnetic element with the first sealing ring in the same mounting groove helps simplify the production and assembly process and makes the overall structure of the explosion-proof valve more compact.

[0034] Secondly, this application provides an electrical device including the aforementioned battery, which is used to supply electrical energy to the electrical device.

[0035] The electrical device of this application has the advantages of the battery of this application.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of some embodiments of the electrical device disclosed in this application.

[0039] Figure 2 These are exploded views of some embodiments of the battery disclosed in this application.

[0040] Figure 3 This is an exploded view of the explosion-proof valve in some embodiments of the battery disclosed in this application.

[0041] Figure 4 yes Figure 3 First angle view of the explosion-proof valve in the closed state.

[0042] Figure 5 yes Figure 4 AA cross-sectional view of the explosion-proof valve.

[0043] Figure 6 yes Figure 4 BB cross-sectional view of the explosion-proof valve.

[0044] Figure 7 This is a schematic diagram of the structure of the valve cover and the first magnetic element of the explosion-proof valve in some embodiments of the battery disclosed in this application.

[0045] Figure 8 yes Figure 7 CC cross-sectional view of the valve cover and the first magnetic chuck of the explosion-proof valve.

[0046] Figure 9 This is a schematic diagram of the structure of the valve cover of the explosion-proof valve in some embodiments of the battery disclosed in this application.

[0047] Figure 10 yes Figure 9 A schematic diagram of the assembly of the valve cover and the first magnetic suction component of the explosion-proof valve.

[0048] The accompanying drawings are not drawn to scale. Detailed Implementation

[0049] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. Furthermore, the term "vertical" is not strictly vertical, but within the allowable range of error. Similarly, "parallel" is not strictly parallel, but within the allowable range of error.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0054] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), unless otherwise expressly specified. Similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces), unless otherwise expressly specified.

[0055] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] Explosion-proof valves are an important safety device widely used in various high-pressure containers, especially in battery packs of electric vehicles, energy storage systems, and portable electronic devices. Explosion-proof valves open when the pressure inside a high-pressure container exceeds a preset safety value, allowing the container to release excessive pressure and preventing dangerous situations such as explosions due to excessive pressure.

[0058] In some related technologies, explosion-proof valves have components such as covers, guide rods, and springs at their vents to open or close the valve. To achieve the required sealing between the explosion-proof valve and the high-pressure vessel, these components require high machining precision and have complex assembly structures. Furthermore, after assembly, these components occupy a significant amount of space at the valve's vent. When the explosion-proof valve needs to open to release pressure from the high-pressure vessel, these components obstruct the venting process, preventing the timely release of instantaneous energy within the high-pressure vessel and thus posing a safety risk.

[0059] In view of this, the present application provides a battery 100, which is equipped with an explosion-proof valve 20. By improving the explosion-proof valve 20 of the battery 100, the present application can improve the efficiency and safety of the pressure relief process of the battery 100.

[0060] This application embodiment also provides an electrical device 1000, which includes the battery 100 described above, and the battery 100 is used to supply electrical energy to the electrical device 1000.

[0061] Electrical devices 1000 can include, but are not limited to, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0062] For simplicity, we will use an electrical device 1000 as an example to illustrate the concept. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles or hybrid vehicles, etc.

[0063] Please refer to Figure 1 This is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 includes a battery 100, a controller 200, and a motor 300. The controller 200 controls the operation of the motor 300, for example, to meet the power requirements for starting, navigating, and driving the vehicle 1000. The battery 100 provides electrical energy for the operation of the motor 300 and other components in the vehicle 1000. For example, the battery 100 can serve as the operating power source for the vehicle 1000's electrical system, for example, to meet the power requirements for starting, navigating, and running the vehicle 1000. The battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving force for the vehicle 1000. The battery 100 can be installed at the bottom, front, or rear of the vehicle 1000.

[0064] The battery 100 of some embodiments of this application will now be described with reference to the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0065] Please refer to Figure 2 This is an exploded view of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing 10, an explosion-proof valve 20, and individual battery cells 30, with the individual battery cells 30 housed within the housing 10. The housing 10 has a pressure relief hole 11, and the explosion-proof valve 20 is installed at the pressure relief hole 11, which communicates with a battery cavity 12 within the housing 10. The battery 100 can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0066] As an example, such as Figure 2 As shown, the housing 10 includes a housing body 102 and a cover 101 that covers the open side of the housing body 102. A pressure relief hole 11 is provided on the cover 101. When the cover 101 is closed to the open side of the housing body 102, an internal battery cavity 12 is formed. The battery cavity 12 inside the housing 10 provides space for the battery cells 30. The housing 10 provides cooling, sealing, and impact protection for the battery cells 30, and also prevents liquids or other foreign objects from adversely affecting the charging, discharging, or safety of the battery cells 30.

[0067] The battery cell 30 can be a rechargeable battery. A rechargeable battery is a battery cell that can be recharged to activate the active materials and continue to be used after it has been discharged.

[0068] The battery cell 30 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0069] Here, the battery cell 30 can be applied to various types of batteries. The battery mentioned here refers to a single physical module comprising one or more battery cells 30 to provide higher voltage and capacity.

[0070] The box body 102 and the box lid 101 can be in various shapes, such as cuboids or cylinders. The box body 102 can be a hollow structure with one side open, and the box lid 101 can be a plate-like structure.

[0071] In a specific example, the box body 102 is a hollow structure with one side open, and the box cover 101 is also a hollow structure with one side open. When the open side of the box cover 101 closes to the open side of the box body 102, it forms the internal battery cavity 12.

[0072] Figure 2 The individual battery cells 30 are electrically connected, such as in series, parallel, or mixed connection, to achieve the required electrical performance parameters of the battery 100. Mixed connection refers to multiple battery cells 30 being connected in both series and parallel. Adjacent battery cells 30 can be electrically connected through busbars. Multiple battery cells 30 are arranged in rows, and one or more rows of battery cells 30 can be arranged inside the housing body 102 as needed.

[0073] In some embodiments, the individual battery cells 30 of the battery 100 can be arranged along at least one of the length and width directions of the housing body 102. At least one row or column of battery cells 30 can be provided as needed. Alternatively, one or more layers of battery cells 30 can be provided along the height direction of the battery 100 as required.

[0074] In some embodiments, multiple battery cells 30 may first be connected in series, parallel, or in a mixed manner to form a battery module, and then the multiple battery modules may be connected in series, parallel, or in a mixed manner to form a whole, which is housed in the housing 10. In other embodiments, all battery cells 30 are directly connected in series, parallel, or in a mixed manner, and then the whole composed of all battery cells 30 is housed in the housing 10.

[0075] In some embodiments, the battery cell 30 includes an electrode assembly capable of undergoing an electrochemical reaction.

[0076] The electrode assembly may include a first electrode and a second electrode with opposite polarities, and a separator disposed between the first electrode and the second electrode. In some embodiments, the first electrode is a positive electrode and the second electrode is a negative electrode. In other embodiments, the first electrode is a negative electrode and the second electrode is a positive electrode. During the charging and discharging of a single battery cell, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrode. The separator, disposed between the positive and negative electrode, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0077] The following is combined with Figures 2 to 10 Some embodiments of the explosion-proof valve 20 in the battery 100 described above will be explained.

[0078] refer to Figure 2 and Figure 3 As shown, in some embodiments, the explosion-proof valve 20 includes a valve body 21, a valve cover 22, a first magnetic chuck 23, and a second magnetic chuck 24. The valve body 21 is installed at the pressure relief hole 11 of the housing 10, and the valve body 21 has a hollow part of the valve body communicating with the pressure relief hole 11 and an exhaust port 211 communicating with the hollow part of the valve body. The valve cover 22 is positioned at the exhaust port 211 in the initial position and when the pressure of the gas in the battery cavity 12 is less than a preset pressure, so as to be in a closed state of closing the exhaust port 211. The first magnetic chuck 23 is installed on the valve cover 22. The second magnetic chuck 24 is installed on the valve body 21. Wherein, in the closed state of the valve cover 22, there is a preset attraction between the first magnetic chuck 23 and the second magnetic chuck 24. When the pressure of the gas in the battery cavity 12 is greater than or equal to the preset pressure, the valve cover 22 is configured to overcome the preset attraction under the action of the pressure in the battery cavity 12 and separate from the exhaust port 211 to switch to an open state of opening the exhaust port 211.

[0079] The first magnetic attractor 23 and the second magnetic attractor 24 are respectively disposed on the valve cover 22 and the valve body 21. The preset attraction between the first magnetic attractor 23 and the second magnetic attractor 24 can make the valve cover 22 press against the valve body 21, thus ensuring the sealing performance of the explosion-proof valve 20 in the closed state.

[0080] The preset pressure required to open the explosion-proof valve 20 can be set according to the specifications, type, and application scenario of the battery 100, and consequently, the preset attraction force between the first magnetic component 23 and the second magnetic component 24 can also be set accordingly. For example, the preset pressure can be in the range of 3 to 5 kPa.

[0081] Compared to related technologies that use elastic components (such as springs) to seal the valve cover and valve body, this application uses the attraction (magnetic force) between magnetic components for constraint. This avoids the problems of aging, reliability degradation, or even failure of elastic components due to prolonged stress, thus improving the operational reliability of the explosion-proof valve 20. Furthermore, the installation of the magnetic components does not require additional loading structures (such as guide rods or limiting bosses at the vent 211), effectively simplifying the internal structural design of the explosion-proof valve 20 and saving design and manufacturing costs. In addition, the reduction in loading structures allows for sufficient space at the vent 211 for venting, ensuring that the explosion-proof valve 20 can vent gas promptly and efficiently when the gas pressure inside the battery chamber 12 increases sharply, thereby ensuring the safety of the battery 100 during operation.

[0082] After the pressure inside the battery chamber 12 returns to the normal range, the attraction between the first magnetic member 23 and the second magnetic member 24 can cause the valve cover 22 to fall back to the exhaust port 211 to achieve automatic reset, so that the explosion-proof valve 20 can be put back into use, saving the cost of manually maintaining and resetting the explosion-proof valve 20.

[0083] In some embodiments, the first magnetic member 23 and the second magnetic member 24 have the same or similar shapes.

[0084] Compared to two magnetic attractors with different shapes, the magnetic lines of force between two first magnetic attractors 23 and second magnetic attractors 24 with the same or similar shapes can be more evenly distributed, resulting in a more balanced distribution of attractive forces between corresponding positions on the first magnetic attractor 23 and second magnetic attractor 24. On the one hand, this helps ensure that the valve cover 22 is evenly stressed in the closed state, achieving better sealing. On the other hand, during the process of resetting the valve cover 22 relative to the valve body 21, it helps the valve cover 22 to move more easily aligned with the exhaust port 211, thereby achieving accurate resetting.

[0085] In some embodiments, the first magnetic member 23 and / or the second magnetic member 24 have a ring-shaped structure.

[0086] The annular structure provides circumferentially distributed attraction, helping to ensure a circumferential seal for the valve cover 22 in the closed state. Furthermore, when the valve cover 22 resets, the annular first magnetic member 23 and the annular second magnetic member 24 form a natural center alignment guide, enabling the valve cover 22 to achieve accurate reset.

[0087] In addition, the annular structure can be arranged around the exhaust port 211 without occupying the exhaust path within the exhaust port 211, further improving exhaust efficiency.

[0088] In some embodiments, the outer edge of the projection of the first magnetic member 23 onto the valve cover 22 has a circumferentially uniform interval with the outer edge of the valve cover 22.

[0089] Here, the first magnetic attractor 23 and the valve cover 22 have a concentric design, so that the valve cover 22 can be subjected to a uniform circumferential force under the attraction between the first magnetic attractor 23 and the second magnetic attractor 24. This can avoid deformation or poor sealing caused by local stress concentration and improve the working reliability of the explosion-proof valve 20.

[0090] In some embodiments, reference Figure 3 As shown, the explosion-proof valve 20 also includes a limiting structure 25, which is connected between the valve body 21 and the valve cover 22 to limit the distance between the valve body 21 and the valve cover 22 to a preset distance when the valve cover 22 is open.

[0091] The limiting structure 25 helps prevent the valve cover 22 from being ejected from the valve body 21 under the pressure inside the battery cavity 12, thus preventing it from impacting other components or equipment around the explosion-proof valve 20. This is especially important in cases of sudden pressure changes inside the battery cavity 12, effectively increasing system safety. Furthermore, by reasonably setting the preset distance, the valve cover 22 can be more easily pulled back to its initial position and returned to the closed state by the attraction between the two magnetic components after the pressure inside the battery cavity 12 returns to normal, thereby achieving automatic reset of the explosion-proof valve 20.

[0092] refer to Figures 3-6 , specifically Figure 3 Exploded views of the explosion-proof valve 20 provided in some embodiments of this application are shown. Figure 4 It shows Figure 3 Bottom views of some examples of explosion-proof valve 20. Figure 5 and Figure 6 They are shown respectively Figure 4 AA and BB sectional views of the explosion-proof valve 20. Referring to the above figures, the limiting structure 25 includes a sliding rod 251 disposed on the side of the valve cover 22 facing the valve body 21 and a mating part 252 disposed in the hollow part of the valve body 21. The mating part is provided with a groove 252a, and the sliding rod 251 is inserted into the groove 252a. The outer periphery of the sliding rod 251 is provided with a protruding locking part 2511, and the inner wall of the groove 252a is provided with a protruding blocking part 2521. The locking part 2511 is located on the side of the blocking part 2521 away from the valve cover 22. When the valve cover 22 is open, the blocking part 2521 and the locking part 2511 cooperate to restrict the sliding rod 251 at least partially in the groove 252a.

[0093] The groove 252a can accommodate the sliding rod 251 and guide its movement, thereby enabling the valve cover 22 to move stably during opening and closing, avoiding jamming that may be caused by directional misalignment. This helps to achieve efficient opening and resetting of the valve cover 22 and improves the response speed of the explosion-proof valve 20. The blocking part 2521 on the inner wall of the groove 252a can, on the one hand, hinder the movement of the sliding rod 251, slowing down the opening speed of the valve cover 22 and reducing potential impact; on the other hand, it can limit the maximum movement distance of the sliding rod 251, thus avoiding the risk of the valve cover 22 falling off, flying away from the valve body 21, and colliding with it.

[0094] Here, the blocking part 2521 can be provided in one or more places to obtain different blocking effects. Alternatively, the blocking part 2521 can be provided at different positions in the extension direction of the slide groove 252a to control the degree to which the exhaust port 211 is opened when the valve cover 22 is in the open state, thereby obtaining different exhaust rates.

[0095] As an example, in such Figure 5 and Figure 6 In the illustrated embodiment, two blocking portions 2521 are provided on the inner walls of both sides of the slide groove 252a. When the valve cover 22 is closed, the blocking portion 2521 at the end of the slide groove 252a furthest from the valve cover 22 engages with the locking portion 2511. This blocking portion 2521 is located on the side of the locking portion 2511 closest to the valve cover 22, which helps to stably close the valve cover 22. When the valve cover 22 is open, the blocking portion 2521 at the end of the slide groove 252a closest to the valve cover 22 engages with the locking portion 2511. This blocking portion 2521 is located on the side of the locking portion 2511 closest to the valve cover 22, which helps to limit the position of the valve cover 22.

[0096] In some embodiments, the locking portion 2511 includes a rolling element. (See reference) Figure 4 and Figure 7 As shown, the rolling element can be a roller, ball, etc. The rolling element can roll relative to the groove 252a, which helps to reduce the wear between the sliding rod 251 and the groove 252a and improve the service life of the limiting structure 25.

[0097] In some embodiments, the blocking portion 2521 on the inner wall of the slide 252a includes an elastic element. Providing the blocking portion 2521 with an elastic element helps to buffer the impact force between the sliding rod 251 and the slide 252a, thereby increasing the service life of the limiting structure 25.

[0098] In the embodiments of this application, there are multiple options for the assembly method between the first magnetic member 23 and the valve cover 22.

[0099] For example, in such Figure 3In some of the embodiments shown, the first magnetic member 23 is attached to the side of the valve cover 22 facing the valve body 21.

[0100] The direct bonding method is less restricted by the specifications and shape of the valve cover 22, which helps to achieve rapid installation of the first magnetic component 23 and improves production efficiency. Furthermore, the bonding position of the first magnetic component 23 can be flexibly adjusted as needed to obtain the required attraction force distribution and adapt to different design requirements.

[0101] Alternatively, in other embodiments, refer to Figure 7 and Figure 8 The diagram shows an exploded view of the first magnetic member 23 and the valve cover 22. The valve cover 22 has a recess 221 on the side facing the valve body 21, and the first magnetic member 23 can be embedded in the recess 221.

[0102] Embedded installation provides reliable protection, reducing external impacts or scratches on the first magnetic component 23, extending its service life, and making it less prone to displacement or detachment due to vibration or other external forces, especially in dynamic working environments. Furthermore, the first magnetic component 23 can be further bonded to the recess 221, or sealed with adhesive, to improve the installation stability of the first magnetic component 23.

[0103] For example, in some embodiments, the first magnetic member 23 has a ring-shaped structure, such as... Figure 9 As shown, the valve cover 22 has at least two support portions 222 arranged circumferentially along the side facing the valve body 21, and the support portion 222 has a groove 2221 on the side away from the center of the valve cover 22. Figure 10 It shows Figure 9 A bottom view of the valve cover 22 and the first magnetic member 23 being installed together, wherein the first magnetic member 23 is sleeved on the outer periphery of at least two support portions 222 and is at least partially embedded in the groove 2221.

[0104] The groove 2221 enables the positioning and fixation of the first magnetic chuck 23, ensuring its reliable installation. Furthermore, the support 222 provides greater flexibility in the installation position of the first magnetic chuck 23. By adjusting the position of the groove 2221 axially above the exhaust port 211, the distance between the first magnetic chuck 23 and the second magnetic chuck 24 can be adjusted, thereby providing different preset attractive forces when the valve cover 22 is in its initial position, meeting the design requirements of explosion-proof valves 20 of different specifications.

[0105] In some embodiments, such as Figure 10 As shown, the first magnetic member 23 has a notch 231 corresponding to the support portion 222 on the side near the support portion 222, so that the first magnetic member 23 can be sleeved onto the outer periphery of at least two support portions 222 through the notch 231.

[0106] During the process of fitting the first magnetic chuck 23 onto the outer periphery of at least two support portions 222, the notch 231 can be aligned with one support portion 222, thereby leaving sufficient installation space on the inner side of the first magnetic chuck 23, which helps to reduce the expansion and pulling of the first magnetic chuck 23 during installation. Then, by rotating, the inner edge of the first magnetic chuck 23 is fully embedded into the groove 2221, achieving a stable fit between the first magnetic chuck 23 and the groove 2221.

[0107] Here, the number and position of the notches 231 provided around the first magnetic component 23 can be set according to the tension of the first magnetic component 23 during the installation process, so as to avoid excessive pulling that could damage the first magnetic component 23.

[0108] In some embodiments, the support 222 and the sliding rod 251 can be configured as the same component, thereby helping to simplify the design of the valve cover 22.

[0109] refer to Figure 3 As shown, in some embodiments, the second magnetic member 24 has an annular structure, and the explosion-proof valve 20 further includes a first sealing ring 26 disposed between the valve body 21 and the housing 10. Figure 3 As shown, the valve body 21 has a mounting groove 212 on the side away from the valve cover 22 for mounting the first sealing ring 26. See details. Figure 5 and Figure 6 As shown, the first sealing ring 26 and the second magnetic attractor 24 are both installed in the mounting groove 212.

[0110] The first sealing ring 26 helps to achieve a seal between the valve body 21 and the housing 10. Here, the second magnetic chuck 24 can be set to the same size as the first sealing ring 26, so that the second magnetic chuck 24 and the first sealing ring 26 are integrated into the same mounting groove 212, which helps to simplify the production and assembly process and also makes the overall structure of the explosion-proof valve 20 more compact.

[0111] refer to Figure 3 and Figure 5 As shown, in some embodiments, a second sealing ring 27 is provided between the valve cover 22 and the valve body 21 to seal the gap between the valve cover 22 and the valve body 21 when the valve cover 22 is closed.

[0112] Next, refer to Figures 2-5 The explosion-proof valve 20 provided in a specific embodiment of this application will be further described.

[0113] like Figure 2 As shown, the explosion-proof valve 20 is installed at the pressure relief hole 11 of the housing 10.

[0114] like Figure 3As shown, the explosion-proof valve 20 includes a valve body 21, a valve cover 22, a first magnetic suction element 23, a second magnetic suction element 24, a limiting structure, a first sealing ring 26, and a second sealing ring 27.

[0115] The valve body 21 has a hollow portion connected to the pressure relief hole 11 and an exhaust port 211 connected to the hollow portion. The valve cover 22 is positioned at the exhaust port 211 in a closed state when the initial position and the gas pressure inside the battery chamber 12 are less than a preset pressure. A first magnetic attractor 23 is mounted on the valve cover 22, and a second magnetic attractor 24 is mounted on the valve body 21. When the valve cover 22 is closed, a preset attraction exists between the first magnetic attractor 23 and the second magnetic attractor 24, which helps to press the valve cover 22 and the valve body 21 together.

[0116] In this embodiment, both the first magnetic attractor 23 and the second magnetic attractor 24 are annular structures.

[0117] like Figure 2 As shown, the first magnetic member 23 is bonded to the side of the valve cover 22 facing the valve body 21. In this embodiment, the first magnetic member 23 and the valve cover 22 are installed concentrically, that is, there is a circumferentially uniform gap between the outer edge of the projection of the first magnetic member 23 on the valve cover 22 and the outer edge of the valve cover 22.

[0118] like Figure 3 and Figure 5 As shown, the valve body 21 has a mounting groove 212 on the side away from the valve cover 22 for installing the first sealing ring 26, and the second magnetic member 24 is also installed in the mounting groove 212.

[0119] like Figure 3 , Figure 4 and Figure 5 As shown, the limiting structure 25 includes a sliding rod 251 disposed on the side of the valve cover 22 facing the valve body 21 and a mating part 252 disposed in the hollow part of the valve body 21. The mating part is provided with a sliding groove 252a, in which the sliding rod 251 is inserted. Here, the outer periphery of the sliding rod 251 is provided with a protruding locking part 2511, and each side of the inner wall of the sliding groove 252a is provided with two protruding blocking parts 2521. When the valve cover 22 is closed, the blocking part 2521 at the end of the sliding groove 252a away from the valve cover 22 engages with the locking part 2511, thereby achieving stable closure of the valve cover 22.

[0120] When the gas pressure inside the battery cavity 12 is greater than or equal to a preset pressure, the valve cover 22, under the pressure of the battery cavity 12, overcomes the preset attraction between the first magnetic member 23 and the second magnetic member 24 and separates from the exhaust port 211 to switch to the open state of the exhaust port 211, so that the gas inside the battery cavity 12 can be discharged through the exhaust port 211. In the open state of the valve cover 22, the blocking part 2521 of the slide groove 252a near the valve cover 22 engages with the locking part 2511 to limit the valve cover 22.

[0121] When the gas in the battery chamber 12 is discharged until the pressure in the battery chamber 12 returns to less than the preset pressure, the valve cover 22 falls back to the exhaust port 211 under the attraction between the first magnetic member 23 and the second magnetic member 24, thus achieving reset, and the explosion-proof valve 20 can continue to be used.

[0122] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0123] Those skilled in the art will understand that, in the methods described in the specific embodiments, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0124] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery (100) characterized in that, The battery (100) comprises: a box body (10) having a pressure relief hole (11) communicating with a battery cavity (12) in the box body (10); and an explosion-proof valve (20) comprising: a valve body (21) mounted at the pressure relief hole (11) of the box body (10), the valve body (21) being provided with a valve body hollow portion communicating with the pressure relief hole (11) and an exhaust port (211) communicating with the valve body hollow portion; a valve cover (22) arranged at the exhaust port (211) in an initial position and when the pressure of gas in the battery cavity (12) is less than a preset pressure, the valve cover (22) being in a closed state of closing the exhaust port (211); a first magnetic attraction member (23) mounted on the valve cover (22); and a second magnetic attraction member (24) mounted on the valve body (21); wherein, in the closed state of the valve cover (22), the first magnetic attraction member (23) and the second magnetic attraction member (24) have a preset attractive force, and when the pressure of gas in the battery cavity (12) is greater than or equal to the preset pressure, the valve cover (22) is configured to separate from the exhaust port (211) under the action of the pressure of the battery cavity (12) to switch to an open state of opening the exhaust port (211) by overcoming the preset attractive force. The first magnetic attraction member (23) and the second magnetic attraction member (24) are identical or similar in shape.

2. The battery (100) according to claim 1, characterized in that The first magnetic attraction member (23) and / or the second magnetic attraction member (24) have a ring structure.

3. The battery (100) according to claim 1, characterized in that The outer edge of the projection of the first magnetic attraction member (23) on the valve cover (22) has a circumferentially uniform spacing with the outer edge of the valve cover (22).

4. The battery (100) according to claim 1, characterized in that The explosion-proof valve (20) further comprises a limiting structure (25) connected between the valve body (21) and the valve cover (22) to limit the distance between the valve body (21) and the valve cover (22) within a preset distance in the open state of the valve cover (22).

5. The battery (100) of claim 1, wherein, The limiting structure (25) comprises a sliding rod (251) arranged on the side of the valve cover (22) facing the valve body (21) and a matching portion (252) arranged in the valve body hollow portion of the valve body (21), the matching portion (252) being provided with a sliding groove (252a), the sliding rod (251) being inserted into the sliding groove (252a), the outer periphery of the sliding rod (251) being provided with a protruding locking portion (2511), the inner wall of the sliding groove (252a) being provided with a protruding blocking portion (2521), and the locking portion (2511) being located on the side of the blocking portion (2521) away from the valve cover (22), in the open state of the valve cover (22), the blocking portion (2521) and the locking portion (2511) cooperate to at least partially limit the sliding rod (251) in the sliding groove (252a).

6. The battery (100) according to claim 5, characterized in that 7. The battery (100) according to claim 1, wherein: the first magnetic attraction member (23) is bonded to the side of the valve cover (22) facing the valve body (21); and / or ​ The side of the valve cover (22) facing the valve body (21) is provided with a recess (221), and the first magnetic member (23) is embedded in the recess (221).

8. The battery (100) of claim 1, wherein, The first magnetic member (23) has a ring structure, and the side of the valve cover (22) facing the valve body (21) is provided with at least two support portions (222) arranged along the circumference of the valve cover (22), and the side of the support portion (222) away from the center of the valve cover (22) is provided with a groove (2221), and the first magnetic member (23) is sleeved on the outer periphery of the at least two support portions (222) and is at least partially embedded in the groove (2221).

9. The battery (100) according to claim 8, characterized in that The side of the first magnetic member (23) close to the support portion (222) is provided with a notch (231) corresponding to the support portion (222), so that the first magnetic member (23) is sleeved on the outer periphery of the at least two support portions (222) through the notch (231).

10. The battery (100) of claim 1, wherein, The second magnetic member (24) has a ring structure, and the explosion-proof valve (20) further comprises a first sealing ring (26) arranged between the valve body (21) and the box body (10), and the side of the valve body (21) away from the valve cover (22) is provided with a mounting groove (212) for mounting the first sealing ring (26), and the second magnetic member (24) is mounted in the mounting groove (212).

11. An electric device (1000) comprising the battery (100) according to any one of claims 1 to 10, wherein the battery (100) is configured to supply electric energy to the electric device (1000).

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