Battery appatatus and electric device

Abstract

A battery apparatus (100) and an electric device. The battery apparatus (100) comprises a battery case (10), battery cells (20), and a pressure relief mechanism (124), wherein the battery case (10) comprises a lower case body (12), which comprises a base plate (121) and a case body frame (122) connected to the base plate (121); accommodating cavities (123) are defined between the base plate (121) and the case body frame (122); the battery cells (20) are accommodated in the accommodating cavities (123); the side of the case body frame (122) facing away from the accommodating cavities (123) is provided with a clearance cavity (12213), the clearance cavity (12213) having a clearance notch; and the case body frame (122) is provided with a first hole (12215), the first hole (12215) being in communication with the accommodating cavities (123) and the clearance cavity (12213), and the pressure relief mechanism (124) being disposed in the clearance cavity (12213) and blocking the first hole (12215). By disposing the pressure relief mechanism (124) in the clearance cavity (12213), the space occupied by the pressure relief mechanism (124) on the exterior of the battery case (10) can be reduced, thereby helping to reduce the impact on a user interface.

Description

Battery devices and electrical equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202520178311.0, entitled “Battery Device and Electrical Equipment”, filed on February 5, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, specifically to a battery device and an electrical appliance. Background Technology

[0004] Currently, with the rapid development of new energy vehicles, battery devices are increasingly coming into the public eye. A battery device typically includes a battery box and individual battery cells housed within it. The battery box usually has a pressure relief mechanism, which is activated to release internal pressure when the internal temperature or pressure reaches a preset threshold, thereby improving the safety of the battery device.

[0005] In related technologies, pressure relief mechanisms are generally located on the outside of the battery box and protrude outwards, occupying external space and affecting the user interface. Summary of the Invention

[0006] In view of the above problems, this application provides a battery device and an electrical device to reduce the space occupied by the pressure relief mechanism on the external space of the battery box, thereby reducing the impact on the user interface. This objective is achieved through the following technical solution:

[0007] In a first aspect, this application provides a battery device, comprising: a battery case, including a base plate and a case frame surrounding the base plate, wherein a receiving cavity is defined between the base plate and the case frame; a battery cell, housed within the receiving cavity; and a pressure relief mechanism, wherein a clearance cavity is provided on the side of the case frame away from the receiving cavity, the clearance cavity having a clearance notch, and the case frame having a first hole communicating with the receiving cavity and the clearance cavity, and the pressure relief mechanism being disposed within the clearance cavity and installed in the first hole.

[0008] According to the battery device provided in this application, a clearance cavity is provided on the side of the housing frame away from the receiving cavity. The clearance cavity has a clearance notch for installing a pressure relief mechanism, and the housing frame also has a first hole communicating with the receiving cavity. The pressure relief mechanism is installed in the clearance cavity and sealed in the first hole. In this way, when the temperature or pressure inside the receiving cavity reaches a preset threshold, the pressure relief mechanism can be actuated to release the pressure inside the receiving cavity, thereby improving the stability and safety of the battery device. In addition, since the pressure relief mechanism is installed in the clearance cavity, the space occupied by the pressure relief mechanism on the external space of the battery box can be reduced, and the impact on the user interface outside the battery box can be reduced, facilitating the installation and use of external devices and the installation and disassembly of the battery box, thereby improving the user experience.

[0009] In addition, the battery device provided in this application may also have the following additional technical features:

[0010] In some embodiments of this application, the box frame includes a frame surrounding the periphery of the base plate and defining the receiving cavity between the frame and the base plate. The frame has the first hole and the side of the frame away from the receiving cavity has the clearance cavity.

[0011] In the above technical solution, the frame extends along the circumferential direction of the base plate and defines a receiving cavity for accommodating the battery cell between the frame and the base plate. The frame has a first hole that communicates with the receiving cavity, and a clearance cavity that communicates with the first hole is provided on the side of the frame away from the receiving cavity. The pressure relief mechanism is installed in the clearance cavity and blocks the first hole, thereby reducing the space occupied by the pressure relief mechanism outside the frame and reducing the impact on the user interface.

[0012] In some embodiments of this application, the frame includes a first side beam, the first side beam including a first plate, a second plate and a sealing member, the first plate being located on the side of the second plate close to the battery cell and being parallel and spaced apart from the second plate, wherein the first plate is provided with the first hole, the second plate is provided with the clearance notch, the sealing member is surrounding the inner periphery of the clearance notch and defining the clearance cavity between the sealing member and the side of the first plate away from the battery cell, and the pressure relief mechanism is installed on the first plate.

[0013] In the above technical solution, the first side beam is a double-layer plate structure. The first plate and the second plate of the first side beam are parallel to each other and spaced apart. There is a gap between the first plate and the second plate. The first plate is closer to the battery cell than the second plate. A first hole is opened on the first plate, and a pressure relief mechanism is installed on the first plate and seals the first hole. An avoidance notch is opened on the second plate. A sealing member is used to surround the inner periphery of the avoidance notch and extends towards the first plate to connect with the side of the first plate facing the second plate. This defines an avoidance cavity between the first plate and the second plate. When the temperature or pressure inside the cavity reaches a preset threshold, the pressure relief mechanism is actuated to open the first hole and the avoidance cavity, so that the pressure inside the cavity can enter the avoidance cavity through the first hole and be discharged to the outside of the battery box through the avoidance notch.

[0014] In some embodiments of this application, the sealing member includes a surrounding plate, which is fixedly connected to the inner wall surface of the clearance notch and the side of the first plate away from the battery cell.

[0015] In the above technical solution, the enclosure plate surrounds the inner wall surface of the clearance gap, forming a cavity with openings at both ends. By fixing one end of the enclosure plate to the side of the first plate facing the second plate, and setting the other end flush with the end face where the clearance gap is located, a clearance cavity for installing the pressure relief mechanism can be defined. The structure and principle are relatively simple and easy to implement.

[0016] In some embodiments of this application, the frame includes a second side beam, and the surface of the second side beam opposite to the receiving cavity is partially recessed to form the relief cavity. The end of the relief cavity opposite to the relief notch is formed with a sealing surface, and the sealing surface has the first hole. The pressure relief mechanism is installed on the sealing surface.

[0017] In the above technical solution, the frame includes a single-layer second side beam with a certain thickness. By setting a relief cavity in the second side beam, the relief cavity is formed by a partial indentation from the side of the second side beam away from the receiving cavity to the side closer to the receiving cavity, so that the bottom wall surface of the relief cavity is a sealed sealing surface. A relief gap is formed on the other side of the sealing surface. Furthermore, by setting a first hole in the bottom wall surface of the relief cavity, the pressure relief mechanism is installed on the bottom wall surface of the relief cavity and the first hole is sealed. This reduces the space occupied by the pressure relief mechanism on the lower box and reduces the impact on the user's external interface of the battery box.

[0018] In some embodiments of this application, the frame includes a frame body and a transition beam. The frame body surrounds the periphery of the base plate and defines the receiving cavity between itself and the base plate. The transition beam is located on the side of the frame body away from the receiving cavity and defines a mounting cavity between itself and the frame body. The mounting cavity is used to install a high-voltage box and allows gas to circulate between itself and the receiving cavity. The transition beam is provided with the clearance cavity and the first hole.

[0019] In the above technical solution, the battery device typically also includes a high-voltage box. The adapter beam is positioned on the outside of the frame body, defining a mounting cavity between itself and the frame body to facilitate the installation of the high-voltage box. Furthermore, by providing a clearance cavity on the side of the adapter beam away from the mounting cavity, and by opening a first hole on the bottom wall of the clearance cavity that communicates with the receiving cavity and the mounting cavity, when the pressure relief mechanism is installed within the clearance cavity and the first hole is sealed, the space occupied by the pressure relief mechanism on the external space of the battery box can be reduced, thereby minimizing the impact on the user interface.

[0020] In some embodiments of this application, the adapter beam includes an adapter beam body and two end connecting beams connected to both ends of the adapter beam body. The adapter beam body is connected to the frame body through the two end connecting beams. The end connecting beams have a partial recess on the side away from the mounting cavity to form the clearance cavity. The bottom wall of the clearance cavity has the first hole.

[0021] In the above technical solution, the end connecting beam has a certain thickness. By partially recessing the side of the end connecting beam away from the mounting cavity, a relief cavity is formed. The bottom wall surface of the relief cavity can form a sealing surface, and a first hole is opened on the bottom wall surface of the relief cavity. The pressure relief mechanism is installed on the bottom wall surface of the relief cavity formed by the end connecting beam and seals the first hole. This can reduce the space occupied by the pressure relief mechanism on the external space of the battery box. The structure and principle are relatively simple and easy to implement.

[0022] In some embodiments of this application, the end connecting beam includes a sheet metal part or a die-cast part; and / or, the end connecting beam is welded to the main body of the transition beam and the main body of the frame, respectively.

[0023] In the above technical solution, sheet metal parts or die-cast parts are easy to process and form to avoid cavities, and are suitable for mass production, which helps to improve production efficiency and reduce production costs.

[0024] The end connecting beam is welded to the main body of the transition beam and the main body of the frame, which helps to improve the reliability of the end connecting beam connection, thereby helping to improve the stability and reliability of the pressure relief mechanism.

[0025] In some embodiments of this application, the housing frame further includes at least one partition, at least one of the partitions being disposed within the receiving cavity and dividing the receiving cavity into at least two receiving spaces.

[0026] In the above technical solution, by setting at least one separator within the frame, the accommodating cavity is divided into at least two accommodating spaces, each of which can be used to accommodate a single battery cell. This facilitates the regional control of the battery cells, thereby further improving the stability of the battery device.

[0027] Secondly, this application provides an electrical device including a battery device as described in any one of the embodiments of the first aspect, the battery device being used to supply power to the electrical device.

[0028] The electrical device provided according to this application includes the battery device described in any one of the first aspect embodiments, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0029] 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

[0030] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0031] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0032] Figure 2 is an exploded structural diagram of a battery device provided in some embodiments of this application;

[0033] Figure 3 is a structural schematic diagram of the lower housing provided in some embodiments of this application from one perspective;

[0034] Figure 4 is an enlarged structural diagram of part A in Figure 3;

[0035] Figure 5 is a structural schematic diagram of the lower housing provided in some embodiments of this application from another perspective;

[0036] Figure 6 is a schematic diagram of a partial cross-sectional view along the BB direction in Figure 5;

[0037] Figure 7 is a structural schematic diagram of the lower housing provided in some embodiments of this application from another perspective;

[0038] Figure 8 is an enlarged structural diagram of part C in Figure 7;

[0039] Figure 9 is an exploded structural diagram of the end connecting beam and pressure relief mechanism provided in some embodiments of this application.

[0040] The reference numerals in the attached drawings are as follows: 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, battery box; 11, upper box; 12, lower box; 20, battery cell; 121, base plate; 122, box frame; 123, receiving cavity; 124, pressure relief mechanism; 1221, frame; 1222, separator; 1223, transition beam; 1224, connecting port; 12211, first plate; 12212, second plate; 12213, clearance cavity; 12214, sealing component; 12215, first hole; 12231, main body of transition beam; 12232, end connecting beam. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] 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.

[0045] 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 three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0047] 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.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, 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 part; 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.

[0049] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0050] The battery device typically includes a battery box and individual battery cells housed within the battery box. The battery box is usually equipped with a pressure relief mechanism, which is activated to release internal pressure when the internal temperature or pressure of the battery box reaches a preset threshold, thereby improving the safety of the battery device.

[0051] In related technologies, pressure relief mechanisms are generally located on the outside of the battery box and protrude outwards, occupying external space and affecting the user interface.

[0052] To address the issue of the pressure relief mechanism of a battery device occupying external space in the battery box and thus affecting the user interface, this application designs a battery device. The battery device includes a battery box with a lower housing. The lower housing includes a base plate and a housing frame connected to the base plate. A receiving cavity for accommodating individual battery cells is defined between the housing frame and the base plate. By providing a clearance cavity with a clearance notch on the housing frame of the battery device, and the clearance cavity being located on the side of the housing frame away from the receiving cavity, and the housing frame having a first hole communicating with the receiving cavity and the clearance cavity, the pressure relief mechanism is installed in the clearance cavity and the first hole is sealed, so that the pressure relief mechanism does not occupy external space in the battery box, thereby helping to reduce the impact on the user interface outside the battery box.

[0053] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be composed of battery cells and battery devices disclosed in this application. This helps to reduce the space occupied by the pressure relief mechanism in the battery device on the external space of the battery box and also helps to reduce the impact on the user interface.

[0054] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0055] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0056] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0057] Please refer to Figure 2, which is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via busbars.

[0058] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20.

[0059] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 together. As an example, a battery module can also be formed by bundling multiple battery cells 20 together with cable ties.

[0060] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0061] Please refer to Figures 3 to 6. Figure 3 is a structural schematic diagram of the lower housing provided in some embodiments of this application from one perspective; Figure 4 is an enlarged structural schematic diagram of part A in Figure 3; Figure 5 is a structural schematic diagram of the lower housing provided in some embodiments of this application from another perspective.

[0062] Figure 6 is a partial cross-sectional view of the structure along the BB direction in Figure 5. This application provides a battery device, including: a battery box 10, a battery cell 20, and a pressure relief mechanism 124. The battery box 10 includes a base plate 121 and a box frame 122 surrounding the base plate 121. A receiving cavity 123 is defined between the base plate 121 and the box frame 122. The battery cell 20 is housed within the receiving cavity 123. A clearance cavity 12213 is provided on the side of the box frame 122 away from the receiving cavity 123. The clearance cavity 12213 has a clearance notch, and the box frame 122 has a first hole 12215. The first hole 12215 communicates with the receiving cavity 123 and the clearance cavity 12213. The pressure relief mechanism 124 is located within the clearance cavity 12213 and installed in the first hole 12215.

[0063] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0064] The battery cell 20 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.

[0065] In some embodiments, the battery device may be a battery pack, which includes a battery case 10 and one or more battery cells 20, the battery cells 20 being housed in the battery case 10.

[0066] As an example, the battery cell 20 assembly can be housed in the battery case 10 by fixing the battery module in the battery case 10.

[0067] As an example, the battery cell 20 assembly can also be housed in the battery box 10 by directly fixing multiple battery cells 20 to the battery box 10.

[0068] As an example, the battery box 10 may include an upper box and a lower box 12. The upper box and the lower box 12 are fastened together to form a closed space inside the battery box 10 to house the battery cells 20 assembly. Here, "closed" refers to covering or closing, and can be sealed or unsealed. The upper box may be a top cover or a bottom plate 121.

[0069] As an example, the battery box 10 may include a top cover, a box frame 122, and a bottom plate 121. The top cover and the bottom plate 121 are respectively connected to the box frame 122, so that the interior of the battery box 10 forms a closed space to accommodate the battery cell 20 assembly.

[0070] In some embodiments, the battery box 10 may be part of the vehicle's chassis structure. For example, a portion of the battery box 10 may be at least a portion of the vehicle's floor 121, or a portion of the battery box 10 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0071] In this embodiment, the pressure relief mechanism 124 is used to release the internal gas of the battery box 10.

[0072] As an example, the battery case 10 is actuated to release internal pressure or temperature when the internal pressure or temperature reaches a predetermined threshold. When the internal pressure or temperature of the battery case 10 reaches the predetermined threshold, the pressure relief mechanism 124 is activated or a weak structure provided in the pressure relief mechanism 124 is destroyed, thereby forming an opening or channel for the release of internal pressure or temperature. The threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery case 10.

[0073] The term "actuation" as used in this application refers to the pressure relief mechanism 124 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 124 may include, but are not limited to: movement of components within the pressure relief mechanism 124 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 124, etc. When the pressure relief mechanism 124 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as exhaust materials. This method allows for pressure and temperature relief of the battery cell 20 under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0074] In this embodiment, the pressure relief mechanism 124 may be partially located within the receiving cavity 123 or completely located within the clearance cavity 12213, meaning that the outer end face of the pressure relief mechanism 124 does not extend beyond the end face where the clearance notch is located. Preferably, the pressure relief mechanism 124 is completely located within the clearance cavity 12213.

[0075] By providing a clearance cavity 12213 on the side of the housing frame 122 away from the receiving cavity 123, the clearance cavity 12213 has a clearance notch for installing the pressure relief mechanism 124, and the housing frame 122 also has a first hole 12215 communicating with the receiving cavity 123. The pressure relief mechanism 124 is installed inside the clearance cavity 12213 and sealed within the first hole 12215. Thus, when the internal temperature or pressure of the receiving cavity 123 reaches a preset threshold, the pressure relief mechanism 124 can be actuated to release the internal pressure of the receiving cavity 123, thereby improving the stability and safety of the battery device. Furthermore, since the pressure relief mechanism 124 is installed inside the clearance cavity 12213, its occupation of the external space of the battery box 10 is reduced, and its impact on the external user interface of the battery box 10 is minimized, facilitating the installation and use of external devices and the installation and disassembly of the battery box 10, thereby improving the user experience.

[0076] Please refer to Figure 3. According to some embodiments of this application, the box frame 122 includes a frame 1221. The frame 1221 surrounds the periphery of the base plate 121 and defines a receiving cavity 123 between the frame 1221 and the base plate 121. The frame 1221 has a first hole 12215 and a clearance cavity 12213 on the side of the frame 1221 away from the receiving cavity 123.

[0077] The frame 1221 extends along the circumferential direction of the base plate 121 and defines a receiving cavity 123 for accommodating the battery cell 20 between the frame 1221 and the base plate 121. The frame 1221 has a first hole 12215 communicating with the receiving cavity 123, and a clearance cavity 12213 communicating with the first hole 12215 is provided on the side of the frame 1221 away from the receiving cavity 123. The pressure relief mechanism 124 is installed in the clearance cavity 12213 and blocks the first hole 12215, thereby reducing the space occupied by the pressure relief mechanism 124 outside the frame 1221 and reducing the impact on the user interface.

[0078] According to some embodiments of this application, the lower housing 12 also includes a partition disposed within the frame 1221. The partition is used to separate the receiving cavity 123 into an exhaust channel, and the exhaust channel is connected to the receiving cavity 123 and the first hole 12215 respectively.

[0079] Please refer to Figures 5 and 6. According to some embodiments of this application, the frame 1221 includes a first side beam, which includes a first plate 12211, a second plate 12212, and a sealing member 12214. The first plate 12211 is located on the side of the second plate 12212 close to the battery cell 20 and is parallel to and spaced apart from the second plate 12212. The first plate 12211 is provided with a first hole 12215, and the second plate 12212 is provided with a clearance notch. The sealing member 12214 surrounds the inner periphery of the clearance notch and defines a clearance cavity 12213 between it and the side of the first plate 12211 away from the battery cell 20. The pressure relief mechanism 124 is installed on the first plate 12211.

[0080] Understandably, the first side beam is a double-layer plate structure, and the first side beam can be any segment of the frame 1221.

[0081] The first plate 12211 and the second plate 12212 of the first side beam are parallel to each other and spaced apart, with a gap between them. The first plate 12211 is closer to the battery cell 20 than the second plate 12212. A pressure relief mechanism 124 is installed on the first plate 12211 and seals the first hole 12215 by opening a first hole 12215 on the first plate 12211. An avoidance notch is opened on the second plate 12212, and a sealing member 12214 is used to surround the inner circumference of the avoidance notch. The first hole 12215 extends towards the first plate 12211 and connects to the side of the first plate 12211 facing the second plate 12212, thereby defining a clearance cavity 12213 between the first plate 12211 and the second plate 12212. When the temperature or pressure inside the cavity 123 reaches a preset threshold, the pressure relief mechanism 124 is actuated to open the first hole 12215 and the clearance cavity 12213, so that the pressure inside the cavity 123 can enter the clearance cavity 12213 through the first hole 12215 and be discharged to the outside of the battery box 10 through the clearance notch.

[0082] Please refer to Figures 4 to 6. According to some embodiments of this application, the sealing member 12214 includes a surrounding plate, which is fixedly connected to the inner wall surface of the clearance notch and the side of the first plate 12211 opposite to the battery cell 20.

[0083] Specifically, the enclosure is set around the inner wall of the clearance notch to form a cavity with openings at both ends. One end of the enclosure is fixedly connected to the side of the first plate 12211 facing the second plate 12212, and the other end can be set flush with the end face where the clearance notch is located, thereby defining the clearance cavity 12213 for installing the pressure relief mechanism 124. The structure and principle are relatively simple and easy to implement.

[0084] According to some embodiments of this application, the frame 1221 includes a second side beam. The side surface of the second side beam opposite to the receiving cavity 123 is partially recessed to form a relief cavity 12213. The end of the relief cavity 12213 opposite to the relief notch is formed with a sealing surface. The sealing surface has a first hole 12215. The pressure relief mechanism 124 is installed on the sealing surface.

[0085] In this embodiment, the second side beam is a single-layer plate structure with a certain thickness. Specifically, the thickness of the second side beam is greater than the thickness of the pressure relief mechanism 124 along the direction from the receiving cavity 123 to the frame 1221.

[0086] By partially recessing the side of the second side beam away from the receiving cavity 123 towards the receiving cavity 123 to form a relief cavity 12213, the bottom wall surface of the relief cavity 12213 becomes a sealed sealing surface, and a relief notch is formed on the other side of the sealing surface. Furthermore, by providing a first hole 12215 on the bottom wall surface of the relief cavity 12213, the pressure relief mechanism 124 is installed on the bottom wall surface of the relief cavity 12213 and the first hole 12215 is sealed. This reduces the space occupied by the pressure relief mechanism 124 on the external space of the lower housing 12 and reduces the impact on the user's external interface of the battery box 10.

[0087] Please refer to Figure 7, which is a structural schematic diagram of the lower housing provided in some embodiments of this application from another perspective. According to some embodiments of this application, the frame 1221 includes a frame body and a transition beam 1223. The frame body surrounds the periphery of the base plate 121 and defines a receiving cavity 123 between the frame body and the base plate 121. The transition beam 1223 is located on the side of the frame body away from the receiving cavity 123 and defines a mounting cavity between the frame body and the frame body. The mounting cavity is used to install the high-pressure box and allows gas to circulate between the mounting cavity and the receiving cavity 123. The transition beam 1223 is provided with a clearance cavity 12213 and a first hole 12215.

[0088] For example, the mounting cavity is rectangular or trapezoidal.

[0089] For example, the frame body has a communication port 1224, which is used to connect the mounting cavity and the receiving cavity 123.

[0090] The high-voltage box is used to distribute the high-voltage electricity from the battery device to various high-voltage electrical devices and to manage the high-voltage circuit safely.

[0091] The adapter beam 1223 is located on the outer side of the frame body and defines a mounting cavity between itself and the frame body. This design does not occupy space within the receiving cavity 123 and facilitates the installation of the high-voltage box. Furthermore, by providing a clearance cavity 12213 on the side of the adapter beam 1223 away from the mounting cavity, and by providing a first hole 12215 on the bottom wall of the clearance cavity 12213 that communicates with both the receiving cavity 123 and the mounting cavity, when the pressure relief mechanism 124 is installed in the clearance cavity 12213 and the first hole 12215 is blocked, the impact of the pressure relief mechanism 124 on the external space of the battery box 10 can be reduced, thereby minimizing the impact on the user interface.

[0092] Please refer to Figures 7 to 9. Figure 8 is an enlarged structural schematic diagram of part C in Figure 7; Figure 9 is an exploded structural schematic diagram of the end connecting beam and pressure relief mechanism provided in some embodiments of this application. According to some embodiments of this application, the transition beam 1223 includes a transition beam body 12231 and two end connecting beams 12232 connected to both ends of the transition beam body 12231. The transition beam body 12231 is connected to the frame body through the two end connecting beams 12232. The end connecting beam 12232 has a partial recess on the side away from the mounting cavity to form a relief cavity 12213. The bottom wall surface of the relief cavity 12213 has a first hole 12215.

[0093] For example, both end connecting beams 12232 are inclined to the adapter beam body 12231. This helps to reduce the distance between the adapter beam 1223 and the frame body while ensuring that the mounting cavity meets the installation space requirements of the high-voltage box, thereby further saving space.

[0094] The end connecting beam 12232 has a certain thickness. By partially recessing the side of the end connecting beam 12232 away from the mounting cavity, a relief cavity 12213 is formed. The bottom wall surface of the relief cavity 12213 can form a sealing surface, and a first hole 12215 is opened on the bottom wall surface of the relief cavity 12213 formed by the end connecting beam 12232. The pressure relief mechanism 124 is installed on the bottom wall surface of the relief cavity 12213 formed by the end connecting beam 12232 and seals the first hole 12215. This can reduce the space occupied by the pressure relief mechanism 124 on the external space of the battery box 10. The structure and principle are relatively simple and easy to implement.

[0095] According to some embodiments of this application, the end connecting beam 12232 includes sheet metal or die casting; the end connecting beam 12232 is welded to the transition beam body 12231 and the frame body respectively.

[0096] Sheet metal or die-cast parts are easy to process and form to avoid cavity 12213, and are suitable for mass production, which helps to improve production efficiency and reduce production costs.

[0097] The end connecting beam 12232 is welded to the main body of the transition beam 12231 and the frame body, which helps to improve the reliability of the connection of the end connecting beam 12232, thereby helping to improve the stability and reliability of the pressure relief mechanism 124.

[0098] Please refer to Figures 3 and 7. According to some embodiments of this application, the box frame 122 further includes at least one partition 1222, which is disposed within the receiving cavity 123 and divides the receiving cavity 123 into at least two receiving spaces.

[0099] Exemplarily, the partition 1222 includes at least one transverse support beam and at least one longitudinal support beam. The transverse support beam extends along a first direction of the lower housing 12 and is fixedly connected to the frame 1221. The longitudinal support beam extends along a second direction of the lower housing 12 and is fixedly connected to the transverse support beam and the frame 1221. The first and second directions intersect. Gas can flow between at least two containment spaces, allowing each containment space to be depressurized via a pressure relief mechanism.

[0100] By providing at least one partition 1222 within the frame 1221, the receiving cavity 123 is divided into at least two receiving spaces, each of which can be used to accommodate a battery cell 20. This facilitates the regional control of the battery cell 20, thereby further improving the stability of the battery device.

[0101] According to some embodiments of this application, referring to Figures 2 to 6, this application provides a battery device including a battery box 10, a battery cell 20, and a pressure relief mechanism 124. The battery box 10 includes a base plate 121 and a box frame 122 surrounding the base plate 121. A receiving cavity 123 is defined between the base plate 121 and the box frame 122. A battery cell 20 is housed in the receiving cavity 123. The box frame 122 includes a side frame 1221 and at least one partition 1222 disposed within the side frame 1221. The at least one partition 1222 divides the receiving cavity 123 into at least two receiving spaces, each of which is used to house the battery cell 20. A clearance cavity 12213 is provided on the side of the side frame 1221 away from the receiving cavity 123. The clearance cavity 12213 has a clearance notch, and the box frame 122 has a first hole 12215. The first hole 12215 communicates with the receiving cavity 123 and the clearance cavity 12213. A pressure relief mechanism 124 is disposed within the clearance cavity 12213 and blocks the first hole 12215. The technical solution of this application can reduce the space occupied by the pressure relief mechanism 124 on the external space of the battery box 10, thereby helping to reduce the impact on the user interface.

[0102] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should 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.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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 device, comprising: A battery box includes a lower box body, the lower box body including a base plate and a box frame connected to the base plate, and a receiving cavity is defined between the base plate and the box frame; A single battery cell is housed within the receiving cavity; The pressure relief mechanism has a relief cavity on the side of the housing frame away from the receiving cavity. The relief cavity has a relief notch, and the housing frame has a first hole that communicates with the receiving cavity and the relief cavity. The pressure relief mechanism is located in the relief cavity and installed in the first hole.

2. The battery device according to claim 1, wherein, The box frame includes a frame that surrounds the periphery of the base plate and defines the receiving cavity between the frame and the base plate. The frame has the first hole and the side of the frame away from the receiving cavity has the clearance cavity.

3. The battery device according to claim 2, wherein, The frame includes a first side beam, which comprises a first plate, a second plate, and a sealing member. The first plate is parallel to and spaced apart from the second plate, and is located on the side of the second plate closer to the battery cell. The first plate has the first hole, the second plate has the clearance notch, the sealing member surrounds the inner periphery of the clearance notch and defines the clearance cavity between the sealing member and the side of the first plate away from the battery cell, and the pressure relief mechanism is installed on the first plate.

4. The battery device according to claim 3, wherein, The sealing component includes a surrounding plate, which is fixedly connected to the inner wall surface of the clearance notch and the side of the first plate away from the battery cell.

5. The battery device according to any one of claims 2-4, wherein, The frame includes a second side beam, and the side surface of the second side beam opposite to the receiving cavity is partially recessed to form the relief cavity. The end of the relief cavity opposite to the relief notch is formed with a sealing surface, and the sealing surface has the first hole. The pressure relief mechanism is installed on the sealing surface.

6. The battery device according to any one of claims 2-5, wherein, The frame includes a frame body and a transition beam. The frame body surrounds the periphery of the base plate and defines the receiving cavity between itself and the base plate. The transition beam is located on the side of the frame body opposite to the receiving cavity and defines a mounting cavity between itself and the frame body. The mounting cavity is used to install the high-voltage box and allows gas to flow between it and the receiving cavity. The transition beam is provided with the clearance cavity and the first hole.

7. The battery device according to claim 6, wherein, The transition beam includes a main body and two end connecting beams connected to both ends of the main body. The main body of the transition beam is connected to the frame body via the two end connecting beams. The end connecting beam has a partial recess on the side opposite to the mounting cavity to form the clearance cavity, and the bottom wall of the clearance cavity has the first hole.

8. The battery device according to claim 7, wherein, The end connecting beam includes sheet metal parts or die-cast parts; And / or, the end connecting beams are welded to the main body of the transition beam and the main body of the frame, respectively.

9. The battery device according to any one of claims 2-8, wherein, The housing frame also includes at least one partition, which is disposed within the receiving cavity and divides the receiving cavity into at least two receiving spaces.

10. An electrical device comprising a battery device as claimed in any one of claims 1-9, the battery device being used to supply power to the electrical device.

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