Battery device and electric device

Abstract

The utility model relates to a battery device and a power utilization device, the battery device comprises a battery box, the battery box comprises a frame and a bottom plate, and the bottom plate is arranged on one side of the frame along a first direction; the extension direction of the first beam body is in the second direction; the two sides, in the third direction, of the first beam body are each connected with at least one second beam body, the extending direction of the second beam bodies is in the third direction, and the second beam bodies and the first beam body divide the containing cavity into a plurality of sub-cavities; the pressure relief mechanisms are installed on the frame, and the pressure relief mechanisms are arranged on the sides, in the second direction, of the second beam bodies on the two sides of the first beam body correspondingly; the first beam body is provided with at least one first notch, the first notch is communicated with two adjacent sub-cavities in the third direction, each second beam body is provided with a second notch, and the second notch is communicated with two adjacent sub-cavities in the second direction. The risk of pressure relief failure caused by faults of any link in a single pressure relief path is reduced, pressure relief is more reliable, and the safety performance of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices and electrical devices. Background Technology

[0002] A battery device typically includes a battery box housing with a receiving cavity inside. Multiple beams are installed inside the receiving cavity, dividing the receiving cavity into multiple sub-cavities, each containing a battery cell assembly.

[0003] In a conventional battery device, the beam contains a cavity. When a single battery cell in the cavity experiences thermal runaway, it generates a large amount of hot air. This hot air is then guided through the cavity in the beam to a pressure relief mechanism installed on the frame of the housing for depressurization.

[0004] As battery capacity and power density continue to increase, the market demands higher and higher safety performance from battery devices. However, conventional battery devices suffer from poor pressure relief reliability in the event of thermal runaway, resulting in poor overall safety performance. Utility Model Content

[0005] Based on this, embodiments of this application provide a battery device and an electrical device that can improve the reliability of pressure relief and the safety performance of the battery device.

[0006] In a first aspect, this application provides a battery device, which includes a battery case, the battery case comprising:

[0007] The frame and the base plate are provided on one side of the frame along the first direction, and the frame and the base plate define the receiving cavity;

[0008] The first beam is disposed within the receiving cavity, and the extension direction of the first beam is along the second direction;

[0009] The second beam is connected to at least one second beam on each side of the first beam along the third direction. The extension direction of the second beam is along the third direction. The third direction, the second direction, and the first direction intersect each other, so that the second beam and the first beam divide the cavity into multiple sub-cavities, each of which is used to accommodate a battery cell assembly.

[0010] Pressure relief mechanism, the pressure relief mechanism is installed on the frame, and the second beams on both sides of the first beam are respectively provided with pressure relief mechanisms on one side along the second direction;

[0011] The first beam has at least one first notch, which connects two adjacent sub-cavities along a third direction. Each second beam has a second notch, which connects two adjacent sub-cavities along a second direction.

[0012] In the aforementioned battery device, at least one second beam is connected to each of the two sides of the first beam along a third direction. The first beam extends along a second direction, enhancing the battery box's impact resistance along the second direction, while the second beams extend along a third direction, enhancing the battery box's impact resistance along the third direction. The first beam and the second beams connected to its two sides divide the battery box's housing into multiple sub-cavities, each used to house a single battery cell assembly. Pressure relief mechanisms are installed on the second beams on both sides of the first beam along the second direction, ensuring that each of the multiple sub-cavities formed by the second beams on each side of the first beam has a nearby pressure relief outlet. Because the first notch on the first beam connects to the adjacent sub-cavities along the third direction, and the second notches on each of the second beams connect to the adjacent sub-cavities along the second direction, the sub-cavities are interconnected. Therefore, when a battery cell component in a certain sub-cavity experiences thermal runaway, the hot airflow does not need to rely on a single pressure relief path. It can quickly diffuse to multiple adjacent sub-cavities through the first and second notches and be discharged through the pressure relief mechanism at the nearest location. This reduces the risk of hot airflow stagnation and lowers the risk of pressure relief failure caused by a failure in any link of a single pressure relief path. Therefore, the pressure relief is more reliable and the safety performance of the battery device is improved.

[0013] In one embodiment, the battery box further includes a top cover, which is disposed on the side of the frame away from the bottom plate and connected to the frame.

[0014] In one embodiment, there is a gap between the first beam and the top cover; and / or, there is a gap between the second beam and the top cover.

[0015] When a single battery cell component in a sub-cavity experiences thermal runaway, the gap between the first beam and / or the second beam and the top cover allows for a more flexible and wider flow area for hot air, further enhancing the redundancy and reliability of the pressure relief path.

[0016] In one embodiment, the first beam is connected to the upper cover.

[0017] In this embodiment, the first beam, which is connected to the base plate, is connected to the top cover. In this way, the top cover can not only be connected to the frame through its four edges, but also the central area of ​​the top cover can be additionally reinforced by the first beam, reducing abnormal noises caused by vibration and other reasons.

[0018] In one embodiment, the battery device further includes a pressure balancing mechanism mounted on the frame.

[0019] This embodiment improves the pressure stability of the battery device by setting up a pressure balancing mechanism, which can bidirectionally adjust the balance between the containment cavity and the external pressure in non-thermal runaway states (such as changes in ambient temperature).

[0020] In one embodiment, the first beam has a cavity inside for accommodating cables; the battery device also includes a sealing plate, which is connected to the first beam and is correspondingly disposed with the first notch, and seals the cavity at the corresponding first notch.

[0021] In this embodiment, the cavity is sealed at the first notch by a sealing piece, thereby sealing the debris inside the cavity and reducing the risk of debris entering the sub-cavity and damaging the battery cell assembly.

[0022] In one embodiment, the second notch is located at one end of the second beam near the first beam.

[0023] In this embodiment, the second notch is located at the end of the second beam near the first beam. This notch can effectively connect adjacent sub-cavities by utilizing the space at the end of the second beam to meet the requirements for heat and gas diffusion, while also preserving the integrity of the main body of the second beam to the greatest extent. This avoids excessive damage to the strength of the second beam due to the setting of the second notch, thereby achieving a balance between pressure relief function and structural stability and ensuring the overall reliability of the battery device.

[0024] In one embodiment, a plurality of second beams arranged along a second direction are respectively connected to both sides of the first beam.

[0025] In this embodiment, multiple second beams arranged along a second direction are connected to both sides of the first beam. This allows the accommodating cavity to be divided into more sub-cavities by the first and second beams, thereby accommodating more individual battery cells and increasing the capacity of the battery device. The dispersed arrangement of the multiple second beams also further enhances the battery device's collision resistance in a third direction.

[0026] In one embodiment, the number of first beams is one; or, the number of first beams is multiple, and the multiple first beams are arranged along a third direction.

[0027] In one embodiment, the frame includes two first sidewalls opposite each other along a third direction, the first sidewalls being connected to one end of an adjacent second beam.

[0028] In one embodiment, two adjacent subcavities along a third direction constitute a subcavity pair;

[0029] There are multiple first notches, and multiple first notches are set to correspond to multiple pairs of sub-cavities. The multiple pairs of sub-cavities are connected through their respective first notches.

[0030] In this embodiment, multiple first slots are configured to correspond to multiple pairs of sub-cavities. The multiple pairs of sub-cavities are connected through their respective first slots, so that each pair of sub-cavities has its own dedicated communication channel, allowing hot air to circulate fully between the sub-cavities, thereby making the pressure relief path more redundant.

[0031] Secondly, this application provides an electrical device including any of the aforementioned battery devices, wherein the battery device is used to supply power to the electrical device.

[0032] In the aforementioned electrical device, at least one second beam is connected to each of the first beam's two sides along a third direction. The first beam extends along a second direction, enhancing the battery box's impact resistance along that direction, while the second beams extend along a third direction, further enhancing the battery box's impact resistance along that direction. The first beam and the second beams connected to its two sides divide the battery box's housing into multiple sub-cavities, each used to house a single battery cell assembly. Pressure relief mechanisms are installed on the second beams on either side of the first beam along the second direction, ensuring that each sub-cavity formed by the second beams on each side of the first beam has a nearby pressure relief outlet. Because the first notch on the first beam connects to the adjacent sub-cavities along the third direction, and the second notches on each of the second beams connect to the adjacent sub-cavities along the second direction, the sub-cavities are interconnected. Therefore, when a battery cell component in a certain sub-cavity experiences thermal runaway, the hot airflow does not need to rely on a single pressure relief path. It can quickly diffuse to multiple adjacent sub-cavities through the first and second notches and be discharged through the pressure relief mechanism at the nearest location. This reduces the risk of hot airflow stagnation and lowers the risk of pressure relief failure caused by a failure in any link of a single pressure relief path. Therefore, the pressure relief is more reliable and the safety performance of the battery device is improved. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application.

[0034] Figure 2 This is an exploded structural diagram of a battery according to some embodiments of this application.

[0035] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application.

[0036] Figure 4 This is a top view of the battery box housing provided in one embodiment of this application.

[0037] Figure 5 for Figure 4 AA sectional view.

[0038] Figure 6 for Figure 4 BB cross-sectional view.

[0039] Figure 7 for Figure 4 The left view of the battery box shown.

[0040] Figure 8 for Figure 6A magnified view of a portion of region A in the middle.

[0041] Figure label:

[0042] ZZ' - First direction; YY' - Second direction; XX' - Third direction;

[0043] 1000 - Vehicles;

[0044] 1100 - Battery assembly; 1110 - Battery box; 1111 - Box body; 1112 - Top cover; 1120 - Individual battery cell; 1121 - End cap; 1121a - Electrode terminal; 1122 - Housing; 1123 - Electrode assembly;

[0045] 1200-Controller;

[0046] 1300-motor;

[0047] 100 - Frame; 101 - Sub-cavity; 110 - First sidewall; 120 - Second sidewall;

[0048] 200-base plate;

[0049] 300 - First beam; 301 - First notch;

[0050] 400 - Second beam; 401 - Second notch;

[0051] 500 - Pressure relief mechanism;

[0052] 600 - Pressure balancing mechanism;

[0053] 700-Blocking plate. Detailed Implementation

[0054] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

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

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0060] 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.

[0061] Battery devices typically include a battery housing with a cavity inside. Multiple beams are installed within this cavity, dividing it into sub-cavities, each containing a single battery cell. In conventional battery devices, the beams contain cavities. When a single battery cell in a sub-cavity experiences thermal runaway, generating a large amount of hot air, this hot air is guided through the cavities within the beams to a pressure relief mechanism mounted on the frame of the housing for depressurization.

[0062] As battery capacity and power density continue to increase, market demands for battery safety performance are rising. However, conventional battery devices suffer from poor pressure relief reliability in the event of thermal runaway, resulting in compromised safety. Specifically, when a single battery cell in a sub-cavity experiences thermal runaway, the hot gas can only flow from the sub-cavity through the cavity within the beam to reach the pressure relief mechanism. This relies on a single, series-connected pressure relief path, meaning that a failure in any part of this path will interrupt the relief process, leading to poor pressure relief reliability.

[0063] Based on the above considerations, in order to solve the problem that conventional battery devices in related technologies have poor pressure relief reliability when thermal runaway occurs, resulting in poor safety performance of the battery device, this application designs a battery device in which pressure relief mechanisms 500 are respectively installed on the second beams 400 on both sides of the first beam 300 along the second direction YY', so that the multiple sub-cavities 101 formed by the second beams 400 on each side of the first beam 300 have a nearby pressure relief outlet. The first notch 301 on the first beam 300 connects to the adjacent sub-cavities 101 along the third direction XX', and the second notch 401 on each of the second beams 400 connects to the adjacent sub-cavities 101 along the second direction YY', so that each sub-cavity 101 is interconnected. Therefore, when a battery cell component in a certain sub-cavity 101 experiences thermal runaway, the hot airflow does not need to rely on a single pressure relief path. It can quickly diffuse to multiple adjacent sub-cavities 101 through the first notch 301 and the second notch 401, and be discharged through the pressure relief mechanism 500 at the nearest location. This reduces the risk of hot airflow stagnation and lowers the risk of pressure relief failure caused by a failure in any link of a single pressure relief path. Therefore, the pressure relief is more reliable and the safety performance of the battery device is improved.

[0064] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. Specifically, the electrical equipment can be, but is not limited to, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. By using the battery device disclosed in this application to form the power system of the electrical equipment, the weight of the battery device can be reduced.

[0065] For ease of explanation, the following embodiments will use a vehicle 1000 as an example of an electrical device from some embodiments of this application.

[0066] Please refer to Figure 1 , Figure 1 The diagram illustrates the structure of a vehicle 1000 according to 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 1100 is installed inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 controls the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0067] In some embodiments of this application, the battery device 1100 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.

[0068] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery provided in some embodiments of this application. The battery device 1100 includes a battery case 1110 and battery cells 1120. The battery cells 1120 are housed within the battery case 1110. The battery case 1110 provides housing space for the battery cells 1120, and the battery case can adopt various structures. In some embodiments, the battery case 1110 may include a top cover 1112 and a housing 1111, the top cover 1112 and the housing 1111 covering each other, and the top cover 1112 and the housing 1111 together define a receiving cavity for housing the battery cells 1120. The housing 1111 can be a hollow structure with one open end, and the top cover 1112 can be a plate-like structure. The top cover 1112 closes onto the open side of the housing 1111 so that the top cover 1112 and the housing 1111 together define the receiving cavity. Alternatively, both the top cover 1112 and the housing 1111 can be hollow structures with one open end, and the open side of the top cover 1112 closes onto the open side of the housing 1111. Of course, the battery box 1110 formed by the top cover 1112 and the housing 1111 can be of various shapes, such as a cylinder, a cuboid, etc.

[0069] In the battery device 1100, there can be multiple battery cells 1120. These multiple battery cells 1120 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that the multiple battery cells 1120 are connected in both series and parallel. The multiple battery cells 1120 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 1120 is housed within the battery box 1110. Alternatively, the battery device 1100 can also consist of multiple battery cells 1120 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the battery box 1110. The battery device may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 1120.

[0070] Each battery cell 1120 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 1120 can be cylindrical, flat, cuboid, or other shapes.

[0071] Please see Figure 3 , Figure 3 It shows Figure 2The diagram shows an exploded view of battery cell 1120. Battery cell 1120 refers to the smallest unit that makes up battery device 1100. Figure 3 The battery cell 1120 includes an end cap 1121, a housing 1122, an electrode assembly 1123, and other functional components.

[0072] End cap 1121 refers to a component that covers the opening of housing 1122 to isolate the internal environment of battery cell 1120 from the external environment. The shape of end cap 1121 can be adapted to the shape of housing 1122 to fit it. Optionally, end cap 1121 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 1121 is less prone to deformation under pressure and impact, allowing battery cell 1120 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 1121a can be provided on end cap 1121. Electrode terminals 1121a can be used for electrical connection with electrode assembly 1123 for outputting or inputting electrical energy into battery cell 1120. In some embodiments, end cap 1121 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 1120 reaches a threshold. The end cap 1121 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating structure may also be provided on the inner side of the end cap 1121. The insulating structure can be used to isolate the electrical connection components inside the housing 1122 from the end cap 1121 to reduce the risk of short circuit. For example, the insulating structure can be plastic, rubber, etc.

[0073] The housing 1122 is a component used to cooperate with the end cap 1121 to form the internal environment of the battery cell 1120, wherein the formed internal environment can accommodate the electrode assembly 1123, electrolyte, and other components. The housing 1122 and the end cap 1121 can be independent components. An opening can be provided on the housing 1122, and the end cap 1121 closes the opening to form the internal environment of the battery cell 1120. Alternatively, the end cap 1121 and the housing 1122 can be integrated. Specifically, the end cap 1121 and the housing 1122 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 1122, the end cap 1121 closes the housing 1122. The housing 1122 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 1122 can be determined according to the specific shape and size of the electrode assembly 1123. The shell 1122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0074] Electrode assembly 1123 is the component in the battery cell 1120 where the electrochemical reaction occurs. The casing 1122 may contain one or more electrode assemblies 1123. The electrode assembly 1123 is mainly formed by stacking composite strips, which are formed by thermally bonding a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 1123, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 1100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 1121a to form a current loop.

[0075] In embodiments of this application, a battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed via a busbar component.

[0076] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0077] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties. As an example, a battery cell assembly can be housed in a housing by fixing the battery module within a housing.

[0078] Figure 4 A top view of the battery box housing provided in one embodiment of this application is shown. Figure 5 It shows Figure 4 AA sectional view. Figure 6 It shows Figure 4 The BB section view. Please refer to... Figures 4 to 6 An embodiment of this application provides a battery device 1100 including a battery box 1110, which includes a frame 100, a base plate 200, a first beam 300, a second beam 400, and a pressure relief mechanism 500.

[0079] The base plate 200 is disposed on one side of the frame 100 along the first direction ZZ', and the frame 100 and the base plate 200 define the receiving cavity.

[0080] The first beam 300 is disposed within the receiving cavity, and the extension direction of the first beam 300 is along the second direction YY'.

[0081] Optionally, the first beam 300 is fixedly connected to the base plate 200, for example by bolting or welding.

[0082] At least one second beam 400 is connected to both sides of the first beam 300 along the third direction XX'. The extension direction of the second beam 400 is along the third direction XX'. The third direction XX', the second direction YY', and the first direction ZZ' intersect each other, so that the second beam 400 and the first beam 300 divide the accommodating cavity into multiple sub-cavities 101, and each sub-cavity 101 is used to accommodate a battery cell assembly.

[0083] Optionally, the third direction XX', the second direction YY', and the first direction ZZ' are perpendicular to each other.

[0084] Optionally, the second beam 400 is fixedly connected to the base plate 200, for example, by bolting or welding.

[0085] The pressure relief mechanism 500 is installed on the frame 100, and the second beams 400 on both sides of the first beam 300 are respectively provided with pressure relief mechanisms 500 on one side along the second direction YY'.

[0086] For details, please refer to Figure 4 The frame 100 includes two first sidewalls 110 opposite each other along a second direction YY' and two second sidewalls 120 opposite each other along a third direction XX'. The pressure relief mechanism 500 can be mounted on the second sidewalls 120.

[0087] Optionally, the pressure relief mechanisms 500 of the second beams 400 on both sides of the first beam 300 along the second direction YY' can be provided on the same second sidewall 120.

[0088] Optionally, the pressure relief mechanism 500 is a one-way explosion-proof valve.

[0089] The first beam 300 is provided with at least one first notch 301, which connects two adjacent sub-cavities 101 along the third direction XX'. Each second beam 400 is provided with a second notch 401, which connects two adjacent sub-cavities 101 along the second direction YY'.

[0090] In the aforementioned battery device 1100, at least one second beam 400 is connected to each side of the first beam 300 along the third direction XX'. The first beam 300 extends along the second direction YY', enhancing the battery box's impact resistance along the second direction YY'. The second beam 400 extends along the third direction XX', further enhancing the battery box's impact resistance along the third direction XX'. The first beam 300 and the second beams 400 connected to its two sides divide the battery box's receiving cavity into multiple sub-cavities 101, each sub-cavity 101 used to accommodate a single battery cell assembly. Pressure relief mechanisms 500 are installed on the second beams 400 on both sides of the first beam 300 along the second direction YY', ensuring that each of the multiple sub-cavities 101 formed by the second beams 400 on each side of the first beam 300 has a nearby pressure relief outlet. Since the first notch 301 on the first beam 300 connects to the adjacent sub-cavities 101 along the third direction XX', and the second notch 401 on each of the second beams 400 connects to the adjacent sub-cavities 101 along the second direction YY', the sub-cavities 101 are interconnected. Therefore, when a battery cell component in a certain sub-cavity 101 experiences thermal runaway, the hot airflow does not need to rely on a single pressure relief path. It can quickly diffuse to multiple adjacent sub-cavities 101 through the first notch 301 and the second notch 401, and be discharged through the pressure relief mechanism 500 at the nearest location. This reduces the risk of hot airflow stagnation and lowers the risk of pressure relief failure caused by a failure in any link of a single pressure relief path. Therefore, the pressure relief is more reliable and the safety performance of the battery device is improved.

[0091] Please combine Figure 2 and Figure 4 In some embodiments, the battery box 1110 further includes a top cover 1112, which covers the side of the frame 100 away from the base plate 200 and is connected to the frame 100.

[0092] Specifically, the opening side of the housing 1111 is the side of the frame 100 away from the base plate 200. The top cover 1112 closes onto the side of the frame 100 away from the base plate 200, thereby enclosing the battery cell assembly inside the housing 1111.

[0093] In some embodiments, the first beam 300 is connected to the upper cover 1112.

[0094] Specifically, the first beam 300 and the upper cover 1112 can be connected by bolts, welding or other means.

[0095] In this embodiment, the first beam 300, which is connected to the base plate 200, is connected to the upper cover 1112. In this way, the upper cover 1112 can not only be connected to the frame 100 through its four edges, but also the central area of ​​the upper cover 1112 can be additionally reinforced by the first beam 300, reducing abnormal noises caused by vibration and other reasons.

[0096] In some embodiments, there is a gap between the first beam 300 and the upper cover 1112.

[0097] By reserving a gap between the first beam 300 and the upper cover 1112, when a battery cell assembly in a certain sub-cavity 101 experiences thermal runaway, the gap between the first beam 300 and the upper cover 1112 allows hot air to flow between the two sides of the first beam 300, thereby making the flow area of ​​hot air more flexible and wider, and further improving the redundancy and reliability of the pressure relief path.

[0098] In some embodiments, there is a gap between the second beam 400 and the upper cover 1112.

[0099] By reserving a gap between the second beam 400 and the top cover 1112, when a battery cell assembly in a certain sub-cavity 101 experiences thermal runaway, the gap between the second beam 400 and the top cover 1112 allows hot air to flow between the two sides of the second beam 400, thereby making the flow area of ​​hot air more flexible and wider, and further improving the redundancy and reliability of the pressure relief path.

[0100] Please combine Figure 4 and Figure 5 In some embodiments, the second notch 401 is provided at one end of the second beam 400 near the first beam 300.

[0101] In this embodiment, the second notch 401 is provided at the end of the second beam 400 near the first beam 300. This not only enables effective communication between adjacent sub-cavities 101 through the end space of the second beam 400 to meet the requirements of hot air diffusion, but also preserves the integrity of the main body of the second beam 400 to the greatest extent and avoids excessive damage to the strength of the second beam 400 due to the setting of the second notch 401. This achieves a balance between pressure relief function and structural stability, ensuring the overall reliability of the battery device 1100.

[0102] It should be noted that the second notch 401 is recessed from one side surface of the second beam 400 along the first direction ZZ', but does not completely penetrate the second beam 400 along the first direction ZZ'. Thus, the portion of the second beam 400 not penetrated by the second notch 401 can still connect with the first beam 300, ensuring effective contact between the second beam 400 and the first beam 300. When the battery device is impacted, the second beam 400 can effectively transfer the impact force to the first beam 300, thereby enhancing the battery device's impact resistance along the third direction XX'.

[0103] In other embodiments, the second notch 401 may also be provided in the middle of the second beam 400.

[0104] Please refer to Figure 4 In one embodiment, a plurality of second beams 400 arranged along the second direction YY' are respectively connected to both sides of the first beam 300.

[0105] like Figure 4 In the embodiment shown, three second beams 400 arranged along the second direction YY' are respectively connected to both sides of the first beam 300.

[0106] In this embodiment, multiple second beams 400 arranged along the second direction YY' are respectively connected to both sides of the first beam 300. Thus, the first beam 300 and the second beams 400 can divide the accommodating cavity into more sub-cavities 101, thereby accommodating more individual battery cells and increasing the capacity of the battery device. The dispersed arrangement of the multiple second beams 400 can also further improve the battery device's collision resistance in the third direction XX'.

[0107] In other embodiments, a second beam 400 may be connected to each side of the first beam 300, or two, four, or other numbers of second beams 400.

[0108] Please refer to Figure 4 In some embodiments, the number of first beams 300 is one.

[0109] Optionally, the first beam 300 is centrally arranged within the receiving cavity along the third direction XX'.

[0110] Specifically, in this embodiment, there is one first beam 300, and the second beam 400 can be divided into two groups of second beam components. The second beams 400 on one side of the first beam 300 form one group of second beam components, and the second beams 400 on the other side form another group of second beam components. Each group of second beam components may include one or more second beams 400 arranged along a third direction XX'.

[0111] In other embodiments, the number of first beams 300 can be multiple (e.g., two, three, etc.), and the multiple first beams 300 are arranged along a third direction XX'. Thus, a set of second beam assemblies is connected to each side of each first beam 300. The number of sets of second beam assemblies is one more than the number of first beams 300. For example, when there are two first beams 300, there are three sets of second beam assemblies, with the two ends of a second beam 400 located between the two first beams 300 connected to the two first beams 300 respectively.

[0112] In one embodiment, the number of pressure relief mechanisms 500 corresponds to the number of second beam assemblies, which can be a one-to-one or multiple-to-one correspondence. Each pressure relief mechanism 500 is located on one side of the corresponding second beam assembly along the second direction YY'.

[0113] Specifically, in Figure 4 In the embodiment shown, there are two pressure relief mechanisms 500, each of which is located on one side of the corresponding second beam assembly along the second direction YY'.

[0114] Understandably, each group of second beam components can also correspond to multiple pressure relief mechanisms 500 (such as two, three, etc.), and the multiple pressure relief mechanisms 500 are located on one side of the corresponding second beam component along the second direction YY'.

[0115] In this embodiment, the pressure relief mechanisms 500 are configured in correspondence with the number of groups of the second beam assemblies, with each pressure relief mechanism 500 located on one side of the corresponding second beam assembly along the second direction YY'. This allows each group of second beam assemblies to have a dedicated, nearby pressure relief outlet on one side of the second direction YY', facilitating the rapid and nearby discharge of hot airflow in the event of thermal runaway.

[0116] Please refer to Figure 4 In some embodiments, the frame 100 includes two first sidewalls 110 opposite each other along a third direction XX', the first sidewalls 110 being connected to one end of an adjacent second beam 400.

[0117] Optionally, the first sidewall 110 can be welded to one end of the adjacent second beam 400, or it can be connected by other means such as bolts.

[0118] exist Figure 4 In the embodiment shown, there is one first beam 300, and the second beams 400 on both sides of the first beam 300 are respectively connected to the two first sidewalls 110.

[0119] If there are two or more first beams 300, one end of the second beam 400 adjacent to the first sidewall 110 is connected to the first sidewall 110.

[0120] In this embodiment, the first sidewall 110 is connected to one end of the adjacent second beam 400. When the battery device is impacted, the impact force can be effectively transmitted through the first sidewall 110 and the second beam 400, thereby improving the impact resistance.

[0121] Please refer to Figure 4 In some embodiments, the frame 100 includes two second sidewalls 120 opposite each other along the second direction YY', and the two ends of the first beam 300 are respectively connected to the two second sidewalls 120 by welding or bolt connection or other means.

[0122] In this embodiment, the two ends of the first beam 300 are respectively connected to the two second sidewalls 120. When the battery device is hit, the collision force can be effectively transmitted between the second sidewalls 120 and the first beam 300, thereby improving the collision resistance.

[0123] Please refer to Figure 4 In one embodiment, two adjacent subcavities 101 along the third direction XX' constitute a pair of subcavities. There are multiple first notches 301, and multiple first notches 301 are correspondingly arranged with multiple pairs of subcavities, and the multiple pairs of subcavities are connected through the corresponding first notches 301.

[0124] Specifically Figure 4 In the battery device, there are four pairs of sub-cavities. There are three first slots 301, and the three first slots 301 are arranged corresponding to the three pairs of sub-cavities. Each first slot 301 is connected to the corresponding pair of sub-cavities.

[0125] In this embodiment, multiple first slots 301 are correspondingly set with multiple pairs of sub-cavities. The multiple pairs of sub-cavities are connected through the corresponding first slots 301, so that each pair of sub-cavities has its own dedicated communication channel, allowing hot air to flow fully between each sub-cavity 101, thereby making the pressure relief path more redundant.

[0126] In other embodiments, the number of first notches 301 can be equal to the number of sub-cavity pairs, so that each pair of sub-cavity pairs can be connected through the corresponding first notches 301.

[0127] Figure 7 It shows Figure 4 The image shows a left view of the battery box. Please refer to the image. Figure 4 and Figure 7 In some embodiments, the battery device 1100 further includes a pressure balancing mechanism 600, which is mounted on the frame 100.

[0128] Optionally, the pressure balancing mechanism 600 is a balanced explosion-proof valve.

[0129] Optionally, the pressure balancing mechanism 600 is located on one side of the second beam 400 along the second direction YY'. For example, the pressure balancing mechanism 600 and the pressure relief mechanism 500 may be located on the same side of the second beam 400 along the second direction YY'.

[0130] This embodiment, by setting up a pressure balancing mechanism 600, can bidirectionally adjust the balance between the containment cavity and the external pressure in a non-thermal runaway state (such as changes in ambient temperature), thereby improving the pressure stability of the battery device.

[0131] Figure 8 It shows Figure 6A partially enlarged view of region A. In one embodiment, the first beam 300 has a cavity inside for accommodating cables. Please refer to... Figure 6 and Figure 8 The battery device 1100 also includes a sealing piece 700, which is connected to the first beam 300. The sealing piece 700 is correspondingly set with the first notch 301 and seals the cavity at the corresponding first notch 301.

[0132] Specifically, during the processing of the first beam 300, some processing debris may be generated and located within the cavity. In this embodiment, the cavity is sealed at the first notch 301 by a sealing piece 700, thereby sealing the debris within the cavity and reducing the risk of debris entering the sub-cavity 101 and damaging the battery cell assembly.

[0133] Understandably, when the sealing piece 700 seals the cavity at the corresponding first notch 301, the sealing piece 700 forms the groove wall of the first notch 301. The sealing piece 700 and the first beam 300 can be fixed by welding or other connection methods.

[0134] This application also provides an electrical device, including any of the battery devices 1100 in the above embodiments, the battery device 1100 being used to supply power to the electrical device.

[0135] In the aforementioned electrical device, at least one second beam 400 is connected to each of the first beam 300 on both sides along the third direction XX'. The first beam 300 extends along the second direction YY', enhancing the battery box's impact resistance along the second direction YY'. The second beam 400 extends along the third direction XX', further enhancing the battery box's impact resistance along the third direction XX'. The first beam 300 and the second beams 400 connected to its two sides divide the battery box's housing into multiple sub-cavities 101, each sub-cavity 101 accommodating a single battery cell assembly. Pressure relief mechanisms 500 are installed on the second beams 400 on both sides of the first beam 300 along the second direction YY', ensuring that each of the multiple sub-cavities 101 formed by the second beams 400 on each side of the first beam 300 has a nearby pressure relief outlet. Since the first notch 301 on the first beam 300 connects to the adjacent sub-cavities 101 along the third direction XX', and the second notch 401 on each of the second beams 400 connects to the adjacent sub-cavities 101 along the second direction YY', the sub-cavities 101 are interconnected. Therefore, when a battery cell component in a certain sub-cavity 101 experiences thermal runaway, the hot airflow does not need to rely on a single pressure relief path. It can quickly diffuse to multiple adjacent sub-cavities 101 through the first notch 301 and the second notch 401, and be discharged through the pressure relief mechanism 500 at the nearest location. This reduces the risk of hot airflow stagnation and lowers the risk of pressure relief failure caused by a failure in any link of a single pressure relief path. Therefore, the pressure relief is more reliable and the safety performance of the battery device is improved.

[0136] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0137] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, Includes a battery box, the battery box comprising: A frame and a base plate, the base plate being disposed on one side of the frame along a first direction, the frame and the base plate defining a receiving cavity; A first beam is disposed within the receiving cavity, and the extension direction of the first beam is along the second direction; A second beam is connected to each side of the first beam along a third direction, and the second beam extends along the third direction. The third direction, the second direction, and the first direction intersect each other, so that the second beam and the first beam divide the receiving cavity into multiple sub-cavities, each sub-cavity being used to accommodate a battery cell assembly. A pressure relief mechanism is installed on the frame, and the pressure relief mechanism is respectively provided on one side of the second beam on both sides of the first beam along the second direction; The first beam has at least one first notch, which connects two adjacent sub-cavities along the third direction. Each second beam has a second notch, which connects two adjacent sub-cavities along the second direction.

2. The battery device according to claim 1, characterized in that, The battery box also includes a top cover, which is disposed on the side of the frame away from the bottom plate and connected to the frame.

3. The battery device according to claim 2, characterized in that, There is a gap between the first beam and the upper cover; and / or, There is a gap between the second beam and the upper cover.

4. The battery device according to claim 2, characterized in that, The first beam is connected to the upper cover.

5. The battery device according to claim 1, characterized in that, It also includes a pressure balancing mechanism, which is mounted on the frame.

6. The battery device according to claim 1, characterized in that, The first beam has a cavity inside for accommodating cables; The battery device further includes a sealing plate, which is connected to the first beam and is correspondingly disposed to the first notch, thereby sealing the cavity at the corresponding first notch.

7. The battery device according to claim 1, characterized in that, The second notch is located at one end of the second beam near the first beam.

8. The battery device according to claim 1, characterized in that, The first beam is connected to two sides by a plurality of second beams arranged along the second direction.

9. The battery device according to claim 1, characterized in that, The number of the first beam is one; or, There are multiple first beams, and these multiple first beams are arranged along the third direction.

10. The battery device according to claim 1, characterized in that, The frame includes two first sidewalls opposite each other along the third direction, the first sidewalls being connected to one end of an adjacent second beam.

11. The battery device according to claim 1, characterized in that, Two adjacent subcavities along the third direction constitute a subcavity pair; There are multiple first notches, and multiple first notches are configured to correspond to multiple pairs of sub-cavities. The multiple pairs of sub-cavities are connected through their respective first notches.

12. An electrical appliance, characterized in that, The battery device includes any one of claims 1-11, wherein the battery device is used to supply power to the electrical device.

Images