Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a single battery and a box body, the box body comprises a containing space and a frame, the single battery is contained in the containing space, the frame is arranged along the periphery of the containing space, and a channel is formed in the frame and surrounds the periphery of the containing space. The frame is further provided with an inlet and an outlet, the inlet is connected with the containing space and the channel, and the outlet is connected with the channel and the outside of the box body. A blocking part is further arranged in the channel and divides the channel into a flowing path which is connected with the inlet and the outlet and approximately surrounds the containing space. According to the battery device, the influence on the external environment when the battery device is abnormal can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to a battery device and an electrical device. Background Art

[0002] With the development of new energy technologies, batteries are increasingly widely used, such as in mobile phones, laptop computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools.

[0003] In the technological development of batteries, when the battery produces abnormal states such as liquid leakage or thermal runaway, the impact on the external environment will directly affect the reliability, usage cost, and user experience of the terminal product. Therefore, how to effectively reduce the impact of the battery on the external environment when an abnormality occurs is an urgent technical problem in battery technology. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can effectively reduce the impact of the battery device on the external environment when an abnormality occurs.

[0005] In a first aspect, an embodiment of the present application provides a battery device. The battery device includes a battery cell and a box body. The box body includes a receiving space and a frame. The battery cell is received in the receiving space. The frame is disposed along the outer periphery of the receiving space. A channel is formed inside the frame, and the channel surrounds the outer periphery of the receiving space. Wherein, an inlet and an outlet are further provided on the frame. The inlet connects the receiving space and the channel, and the outlet connects the channel and the outside of the box body. A blocking member is further provided in the channel. The blocking member divides the channel into a flow path that connects the inlet and the outlet and generally surrounds the receiving space.

[0006] The blocking member in the above technical solution can block the flow of fluid, and can provide a flow path that generally surrounds the receiving space for the fluid flowing from the inlet to the outlet, thereby extending the flow path and time of the fluid in the channel. The fluid can effectively reduce its own temperature in the channel. At the same time, impurities such as metal particles doped in the fluid can be better precipitated in the channel, thereby reducing the risk of damage to other components located outside the battery device and the risk of causing greater pollution to the environment after the fluid is discharged to the outside of the battery device. In this way, the impact of the battery device on the external environment when an abnormality occurs can be effectively reduced.

[0007] In some embodiments of the first aspect, the box body further includes a partitioning member. The partitioning member is disposed in the channel and divides the channel into N sub-channels along a direction intersecting the extending direction of the channel. The inlet and the outlet are respectively provided corresponding to different layers of sub-channels, and N is greater than or equal to 2. Communication holes are formed on the partitioning member, and adjacent two layers of sub-channels are communicated through the communication holes.

[0008] Through the provision of a separating member, the above technical solution can further extend the flow path and time of the fluid in the channel, thereby further reducing the impact on the external environment when the battery device malfunctions.

[0009] In some embodiments of the first aspect, the flow path wraps around the accommodation space approximately N times.

[0010] The above technical solution can further extend the flow path and time of the fluid in the channel, thereby further reducing the impact on the external environment when the battery device malfunctions.

[0011] In some embodiments of the first aspect, the separating member includes a first separator and a second separator. The first separator and the second separator are spaced apart in a direction intersecting the extending direction of the channel, and divide the channel into a first sub-channel, a second sub-channel, and a third sub-channel stacked in a direction intersecting the extending direction of the channel. The second sub-channel is located between the first sub-channel and the third sub-channel. The communication holes include a first hole and a second hole. The first hole is provided in the first separator, and the first sub-channel and the second sub-channel are communicated through the first hole. The second hole is provided in the second separator, and the second sub-channel and the third sub-channel are communicated through the second hole. The inlet is provided corresponding to one of the first sub-channel and the third sub-channel, and the outlet is provided corresponding to the other of the first sub-channel and the third sub-channel.

[0012] By setting the channel as a three-layer structure including a first sub-channel, a second sub-channel, and a third sub-channel, the above technical solution can further extend the flow path of the fluid in the channel, thereby further reducing the impact on the external environment when the battery device malfunctions.

[0013] In some embodiments of the first aspect, the first separator and the second separator are spaced apart along the height of the box body. The first sub-channel is located at the bottom of the box body, and the third sub-channel is located at the top of the box body. The inlet is provided corresponding to the first sub-channel, and the outlet is provided corresponding to the third sub-channel.

[0014] The above technical solution can effectively reduce the content of impurities such as metal particles in the fluid discharged to the outside of the battery device, thereby further reducing the impact on the external environment.

[0015] In some embodiments of the first aspect, both the first hole and the second hole are provided close to the blocking member. The inlet is provided corresponding to the first sub-channel, and the outlet is provided corresponding to the third sub-channel. The inlet and the first hole are respectively located on opposite sides of the blocking member along the extending direction of the first sub-channel. The first hole and the second hole are respectively located on opposite sides of the blocking member along the extending direction of the second sub-channel. The second hole and the outlet are respectively located on opposite sides of the blocking member along the extending direction of the third sub-channel.

[0016] By arranging the first hole and the second hole both close to the blocking member, the above technical solution can further extend the flow path of the fluid in the channel, thereby further reducing the impact on the external environment when the battery device malfunctions.

[0017] In some embodiments of the first aspect, the blocking member includes a first blocking piece, a second blocking piece, and a third blocking piece. The first blocking piece is disposed in the first sub-channel and divides the first sub-channel along the extension direction of the first sub-channel. The second blocking piece is disposed in the second sub-channel and divides the second sub-channel along the extension direction of the second sub-channel. The third blocking piece is disposed in the third sub-channel and divides the third sub-channel along the extension direction of the third sub-channel.

[0018] By setting the blocking member as a split structure including a first blocking piece, a second blocking piece, and a third blocking piece, the above technical solution can flexibly adjust the structures or positions of the first blocking piece, the second blocking piece, and the third blocking piece according to different requirements, thereby improving the flexibility and applicability of the setting of the blocking member.

[0019] In some embodiments of the first aspect, in the stacking direction of the first sub-channel, the second sub-channel, and the third sub-channel, the first blocking piece, the second blocking piece, and the third blocking piece at least partially overlap. This makes the positions of the first blocking piece, the second blocking piece, and the third blocking piece on the box body substantially the same, reducing the structural complexity and facilitating maintenance.

[0020] In some embodiments of the first aspect, the first blocking piece, the second blocking piece, and the third blocking piece are integrally formed.

[0021] On the one hand, there is no need to connect the first blocking piece, the second blocking piece, and the third blocking piece through an additional connection process, which simplifies the manufacturing process flow. At the same time, compared with connecting the first blocking piece, the second blocking piece, and the third blocking piece through an additional connection process, the integrally formed first blocking piece, second blocking piece, and third blocking piece have higher connection firmness.

[0022] In some embodiments of the first aspect, the opening area of the communication hole is 50 mm 2 -3000 mm 2 .

[0023] By setting the opening area of the communication hole within the above range, the above technical solution can make the overall flow time of the fluid in the channel within a suitable range, thereby reducing the impact on the external environment when the battery device malfunctions while taking into account reducing the risk of excessive pressure inside the frame.

[0024] In some embodiments of the first aspect, the opening area of the communication hole is 200 mm 2 -1300 mm2 It can further improve the comprehensive effect of reducing the impact on the external environment when the battery device generates an abnormality and reducing the risk of excessive pressure generated inside the frame.

[0025] In some embodiments of the first aspect, the area of the cross-section of the sub-channel perpendicular to the extending direction of the sub-channel is 50 mm 2 -3000 mm 2 .

[0026] By setting the area of the cross-section of the sub-channel perpendicular to the extending direction of the sub-channel within the above range, the above technical solution can make the overall flow time of the fluid in the channel within a suitable range, so as to reduce the impact on the external environment when the battery device generates an abnormality while taking into account reducing the risk of excessive pressure generated inside the frame.

[0027] In some embodiments of the first aspect, the area of the cross-section of the sub-channel perpendicular to the extending direction of the sub-channel is 200 mm 2 -1300 mm 2 It can further improve the comprehensive effect of reducing the impact on the external environment when the battery device generates an abnormality and reducing the risk of excessive pressure generated inside the frame.

[0028] In some embodiments of the first aspect, the frame includes M beam bodies. The M beam bodies are arranged along the outer periphery of the accommodation space and are connected end to end. Cavities are formed inside each beam body, and the cavities of the M beam bodies are interconnected to form a channel, where M is greater than or equal to 2. The blocking member is disposed at the position where the first beam body and the Mth beam body are connected, and separates the cavity of the first beam body and the cavity of the Mth beam body at the position where the first beam body and the Mth beam body are connected. The inlet is disposed on the first beam body, and the outlet is disposed on the Mth beam body.

[0029] The above technical solution is beneficial to reducing the assembly difficulty of the blocking member and reducing the production cost by providing M beam bodies to form the frame.

[0030] In some embodiments of the first aspect, the frame includes M beam bodies. The M beam bodies are arranged along the outer periphery of the accommodation space and are connected end to end. Cavities are formed inside each beam body, and the cavities of the M beam bodies are interconnected to form a channel, where M is greater than or equal to 2. The blocking member is disposed at the position where the first beam body and the Mth beam body are connected, and separates the cavity of the first beam body and the cavity of the Mth beam body at the position where the first beam body and the Mth beam body are connected. When the number of layers N of the sub-channel is even, the inlet and the outlet are disposed on the first beam body. When the number of layers N of the sub-channel is odd, the inlet is disposed on the first beam body, and the outlet is disposed on the Mth beam body.

[0031] With such a setting, it is possible to maximize the flow path and time of the fluid in the channel when the number of layers of the sub-channel is fixed.

[0032] In some embodiments of the first aspect, each beam body includes two end faces opposite to each other along its own length direction, and the M beam bodies are connected end to end through the end faces.

[0033] The above technical solution can make the two end faces opposite to each other along the length direction of the beam body be inclined, which can reduce the operation difficulty of directly connecting multiple beam bodies and help improve production efficiency.

[0034] In some embodiments of the first aspect, each beam body includes a beam main body and N - 1 first reinforcing ribs. A cavity is arranged in the beam main body, and the N - 1 first reinforcing ribs are arranged in the cavity. The first reinforcing ribs of every two adjacent beam bodies are butted and connected to form N - 1 partition components, and the N - 1 partition components divide the channel into N layers of sub-channels along a direction intersecting with the extension direction of the channel. A communication hole is formed in at least one of the first reinforcing ribs of the first beam body and the Mth beam body. In the sub-channel provided with an inlet or an outlet, the communication hole is located at one end of the sub-channel far from the inlet or the outlet.

[0035] The above technical solution is beneficial to reducing the preparation difficulty of the frame and the production cost by connecting the first reinforcing ribs of multiple beam bodies to form partition components.

[0036] In some embodiments of the first aspect, the box body further includes a first sealing member, and the first sealing member is clamped between the first reinforcing ribs of two adjacent beam bodies.

[0037] The above technical solution can achieve the sealed connection of two adjacent beam bodies without welding the first reinforcing ribs of the two adjacent beam bodies by setting the first sealing member, thereby reducing the overall preparation difficulty, improving production efficiency and reducing costs.

[0038] In some embodiments of the first aspect, the box body further includes a plurality of connecting members, and the number of the connecting members matches the number of the beam bodies. Every two adjacent beam bodies are connected by the connecting members. A cavity is formed inside the connecting members, and the cavities of the multiple beam bodies are communicated through the cavity. A blocking member is arranged at the position where the first beam body and the Mth beam body are connected by the connecting members.

[0039] The above technical solution can effectively reduce the connection difficulty between multiple beam bodies by introducing connecting members to connect two adjacent beam bodies, so as to further improve the production efficiency of the battery device as a whole and reduce costs.

[0040] In some embodiments of the first aspect, the beam body includes a beam main body and N - 1 first reinforcing ribs. A cavity is provided in the beam main body, and the N - 1 first reinforcing ribs are provided in the cavity. The connecting member includes a connecting main body and N - 1 second reinforcing ribs. The connecting main body connects the beam main bodies of two adjacent beam bodies. A cavity body is provided in the connecting main body, and the N - 1 second reinforcing ribs are provided in the cavity body. Each second reinforcing rib is butt - connected to the first reinforcing ribs of two adjacent beam bodies to form N - 1 partition members, and the N - 1 partition members divide the channel into N sub - channels along a direction intersecting the extension direction of the channel. A communication hole is provided on the first reinforcing rib of at least one of the first beam body and the Mth beam body. In the sub - channel provided with an inlet or an outlet, the communication hole is located at an end of the sub - channel far from the inlet or the outlet.

[0041] Through the above - mentioned technical solution, by providing the second reinforcing ribs to connect the first reinforcing ribs of two adjacent beam bodies, the connection difficulty between the first reinforcing ribs of multiple beam bodies can be further reduced, so as to further improve the overall production efficiency of the battery device and reduce the cost. In addition, in the sub - channel provided with an inlet or an outlet, the communication hole is located at an end of the sub - channel far from the inlet or the outlet, which can further extend the flow path of the fluid in the channel, thereby further reducing the impact on the external environment when the battery device has an abnormality.

[0042] In some embodiments of the first aspect, the box body further includes a second sealing member, and the second sealing member is connected between the second reinforcing rib and the first reinforcing rib.

[0043] Through the above - mentioned technical solution, by providing the second sealing member, the sealed connection between the second reinforcing rib and the first reinforcing rib can be realized without welding the second reinforcing rib and the first reinforcing rib, thereby reducing the overall preparation difficulty, improving the production efficiency and reducing the cost.

[0044] In some embodiments of the first aspect, the battery device further includes a pressure - relief mechanism, and the pressure - relief mechanism is communicated with the outlet.

[0045] Through the above - mentioned technical solution, by providing the pressure - relief mechanism at the outlet, the fluid in the channel can be discharged to the outside of the battery device only when certain conditions are met, so as to reduce unnecessary fluid discharge, thereby further reducing the impact on the external environment.

[0046] In the second aspect, the present application provides an electrical device, which includes the battery device provided in any embodiment of the first aspect, and the battery device is used to provide electrical energy.

[0047] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above - mentioned and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0049] Figure 1 Schematic structural diagram of a vehicle provided by some embodiments of the present application;

[0050] Figure 2 Schematic three-dimensional structure diagram of a battery device provided by some embodiments of the present application;

[0051] Figure 3 Front view structural diagram of a box body of a battery device provided by some embodiments of the present application;

[0052] Figure 4 Is Figure 3 Schematic cross-sectional structure diagram along A-A;

[0053] Figure 5 Is Figure 3 Schematic cross-sectional structure diagram along B-B;

[0054] Figure 6 Schematic three-dimensional perspective structure diagram of a box body provided by some embodiments of the present application;

[0055] Figure 7 Is Figure 6 Schematic diagram of the flow direction of the fluid in the box body shown;

[0056] Figure 8 Exploded structure diagram of a box body provided by some embodiments of the present application;

[0057] Figure 9 Is Figure 8 Schematic three-dimensional structure diagram of the beam body of the box body shown;

[0058] Figure 10 Top view structural diagram of another box body provided by some embodiments of the present application;

[0059] Figure 11 Is Figure 10 Schematic cross-sectional structure diagram along C-C;

[0060] Figure 12 Schematic three-dimensional perspective structure diagram of another box body provided by some embodiments of the present application;

[0061] Figure 13 Is Figure 12 Local enlarged structure diagram at H of;

[0062] Figure 14 For Figure 12 Schematic diagram of the fluid flow direction in the shown box body;

[0063] Figure 15 Exploded structure schematic diagram of another box body provided by some embodiments of the present application;

[0064] Figure 16 For Figure 15 Stereo structure schematic diagram of the beam body of the shown box body;

[0065] Figure 17 Top view structure schematic diagram of still another box body provided by some embodiments of the present application;

[0066] Figure 18 For Figure 17 Section structure schematic diagram along D-D;

[0067] Figure 19 Exploded structure schematic diagram of yet another box body provided by some embodiments of the present application;

[0068] Figure 20 Partial exploded structure schematic diagram of still another box body provided by some embodiments of the present application;

[0069] Figure 21 Stereo structure schematic diagram of the first seal provided by some embodiments of the present application;

[0070] Figure 22 Partial exploded structure schematic diagram of still another box body provided by some embodiments of the present application;

[0071] Figure 23 Partial exploded structure schematic diagram of still another box body provided by some embodiments of the present application;

[0072] Figure 24 Stereo structure schematic diagram of the cooperation between the beam body and the connecting piece of a battery device provided by some embodiments of the present application;

[0073] Figure 25 Partial exploded structure schematic diagram of still another box body provided by some embodiments of the present application;

[0074] Figure 26 Stereo structure schematic diagram of the second seal provided by some embodiments of the present application;

[0075] Figure 27 Stereo structure schematic diagram of another battery device provided by some embodiments of the present application.

[0076] The reference numerals in the specific embodiments are as follows:

[0077] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor;

[0078] 10. Battery cell; 20. Box body; 21. Accommodating space; 22. Frame; 221. Channel; 2211. Sub-channel; 2211a. First sub-channel; 2211b. Second sub-channel; 2211c. Third sub-channel; 222. Inlet; 223. Outlet; 23. Blocking component; 23a. First blocking member; 23b. Second blocking member; 23c. Third blocking member; 24. Partitioning component; 24a. First partitioning member; 24b. Second partitioning member; 241. Communication hole; 241a. First hole; 241b. Second hole; 25. Beam body; 251. Cavity; 252. First surface; 253. Second surface; 254. End face; 255. Beam main body; 256. First reinforcing rib;

[0079] 30. First seal; 40. Connecting member; 41. Cavity; 42. Connecting main body; 43. Second reinforcing rib; 50. Second seal; 60. Pressure relief mechanism. Detailed implementation manners

[0080] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0081] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above accompanying drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above accompanying drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0082] Referring to "embodiments" in the present application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0083] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "linked", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0084] The term "and / or" in the present application is merely a correlative relationship describing related objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the related objects before and after.

[0085] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only illustrative descriptions and should not constitute any limitation to the present application.

[0086] The term "a plurality of" appearing in the present application refers to two or more (including two).

[0087] The term "parallel" in the present application includes not only the case of absolute parallelism but also the case of approximately parallelism as conventionally recognized in engineering; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity but also the case of approximately perpendicularity as conventionally recognized in engineering.

[0088] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of the present application also do not limit this.

[0089] The battery device mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0090] In some embodiments, the battery device can be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0091] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and battery cells, and the battery cells or battery modules are accommodated in the box body.

[0092] In some embodiments, the box body can be part of the chassis structure of a vehicle. For example, part of the box body can form at least part of the floor of the vehicle, or part of the box body can form at least part of the cross beams and longitudinal beams of the vehicle.

[0093] In some embodiments, the battery device can be an energy storage device. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0094] With the development of new energy technologies, batteries are increasingly widely used, such as in mobile phones, laptops, battery cars, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0095] In the technological development of batteries, when the battery has abnormal states such as liquid leakage or thermal runaway, the impact on the external environment will directly affect the reliability, usage cost, and user experience of the terminal product.

[0096] When the battery device has an abnormality, a large amount of fluid will be generated inside the battery device. For example, when thermal runaway occurs in the battery cells inside the battery device, a large amount of high-temperature gas will be generated inside the battery device, and the high-temperature gas will also be doped with impurities such as some metal particles; when the electrolyte of the battery cells inside the battery device leaks, a large amount of electrolyte will be generated inside the battery device. When the battery device has an abnormality, if the fluid generated inside the battery device is directly discharged to the outside of the battery device in a short time, it will not only easily damage other components located around the outside of the battery device, but also cause greater pollution to the environment.

[0097] Based on the above considerations, the embodiments of the present application provide a battery device. The battery device includes battery cells and a box body. The box body includes an accommodation space and a frame. The battery cells are accommodated in the accommodation space. The frame is arranged along the outer periphery of the accommodation space. A channel is opened inside the frame, and the channel surrounds the outer periphery of the accommodation space. Wherein, an inlet and an outlet are further provided on the frame. The inlet connects the accommodation space and the channel, and the outlet connects the channel and the outside of the box body. A blocking component is further provided in the channel. The blocking component divides the channel into a flow path that connects the inlet and the outlet and generally surrounds the accommodation space.

[0098] When an abnormality occurs in the battery device, the fluid generated inside the battery device can enter the channel through the inlet, flow through the channel to the outlet, and then be discharged to the outside of the battery device through the outlet. Among them, the fluid can be a gas or a liquid. The blocking component of the above technical solution can block the flow of the fluid and provide a flow path that generally surrounds the accommodation space for the fluid flowing from the inlet to the outlet, thereby extending the flow path and time of the fluid in the channel. This enables the fluid to effectively reduce its own temperature in the channel. At the same time, impurities such as metal particles doped in the fluid can better precipitate in the channel, thereby reducing the risk of damage to other components located outside the battery device and the risk of causing greater environmental pollution after the fluid is discharged to the outside of the battery device. In this way, the impact on the external environment when the battery device has an abnormality can be effectively reduced.

[0099] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices using battery devices.

[0100] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a stationary or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, and a power planer, etc.

[0101] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applicable to all battery devices including battery boxes and electrical equipment using battery devices. However, for the sake of brevity of description, the following embodiments will be described by taking an electric vehicle as an example.

[0102] Figure 1 It is a schematic structural diagram of a vehicle provided for some embodiments of this application.

[0103] Continue to refer to Figure 1 , inside the vehicle 1, there is a battery device 2, and the battery device 2 can be arranged at the bottom, head, or tail of the vehicle 1. The battery device 2 can be used for power supply of the vehicle 1. For example, the battery device 2 can be used as the operating power source of the vehicle 1.

[0104] The vehicle 1 may further include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1.

[0105] In some embodiments of the present application, the battery device 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0106] Figure 2 A perspective structural view of a battery device provided in some embodiments of the present application, Figure 3 A front view structural view of a box body of a battery device provided in some embodiments of the present application, Figure 4 is Figure 3 A sectional structural view along A-A, Figure 5 is Figure 3 A sectional structural view along B-B, Figure 6 A perspective view structural view of a box body provided in some embodiments of the present application, Figure 7 is Figure 6 A schematic diagram of the flow direction of the fluid in the box body shown, Figure 8 An exploded structural view of a box body provided in some embodiments of the present application, Figure 9 is Figure 8 A perspective structural view of the beam body of the box body shown.

[0107] Referring to Figures 2 to 9 , embodiments of the present application provide a battery device 2. The battery device 2 includes battery cells 10 and a box body 20. The box body 20 includes an accommodation space 21 and a frame 22. The battery cells 10 are accommodated in the accommodation space 21. The frame 22 is disposed along the outer periphery of the accommodation space 21. A channel 221 is formed inside the frame 22. The channel 221 surrounds the outer periphery of the accommodation space 21. Among them, an inlet 222 and an outlet 223 are further provided on the frame 22. The inlet 222 connects the accommodation space 21 and the channel 221, and the outlet 223 connects the channel 221 and the outside of the box body 20. A blocking member 23 is further provided in the channel 221. The blocking member 23 divides the channel 221 into a flow path that connects the inlet 222 and the outlet 223 and generally surrounds the accommodation space 21.

[0108] In the battery device 2, the box body 20 is used to accommodate the battery cells 10. The box body 20 can have various structures, such as a cylinder, a cuboid, etc. The battery cells 10 can be one or multiple. If there are multiple battery cells 10, the multiple battery cells 10 can be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the multiple battery cells 10. The multiple battery cells 10 can be directly connected in series, in parallel, or in a series-parallel combination together, and then the whole formed by the multiple battery cells 10 is accommodated in the box body 20; of course, it can also be that multiple battery cells 10 are first connected in series, in parallel, or in a series-parallel combination to form battery modules, and then the multiple battery modules are connected in series, in parallel, or in a series-parallel combination to form a whole and are accommodated in the box body 20.

[0109] Exemplarily, the frame 22 can be a cuboid-shaped frame 22, a cylindrical frame 22, or other irregular frames 22, etc. Correspondingly, the shape of the accommodation space 21 matches the shape of the frame 22. If the frame 22 is a cuboid-shaped frame 22, then the accommodation space 21 is a cuboid; if the frame 22 is a cylindrical frame 22, then the accommodation space 21 is a cylinder.

[0110] Optionally, the frame 22 can be made of, but not limited to, metal or non-metal materials. For example, the metal materials can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, or stainless steel, etc., and the non-metal materials can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide, or polyamide, etc.

[0111] In the battery device 2, the battery cells 10 can be one or multiple. If there are multiple battery cells 10, the multiple battery cells 10 can be connected in series, parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 10. The multiple battery cells 10 can be directly connected in series, parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 10 is accommodated in the box body 20; of course, it can also be that the multiple battery cells 10 are first connected in series, parallel, or in a combined series-parallel connection to form battery modules, and then the multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 20.

[0112] In some examples, there are multiple battery cells 10, and the multiple battery cells 10 are first connected in series, parallel, or in a combined series-parallel connection to form battery modules. The multiple battery modules are then connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 20.

[0113] The multiple battery cells 10 in the battery module can be electrically connected through a busbar component to achieve parallel, series, or combined series-parallel connection of the multiple battery cells 10 in the battery module.

[0114] The blocking component 23 is disposed in the channel 221 and divides the channel 221 along the extension direction of the channel 221. The blocking component 23 is used to block the flow of the fluid located in the channel 221, and the inlet 222 and the outlet 223 are disposed close to the blocking component 23 to provide a flow path that generally surrounds the accommodation space 21 for the fluid flowing from the inlet 222 to the outlet 223. Herein, the flow path refers to the route that the fluid located in the channel 221 can pass through. In some examples, the flow path can also be referred to as a flow channel.

[0115] Exemplarily, the blocking member 23 has a first end and a second end. The channel 221 is connected between the first end and the second end, and fluid can flow between the first end and the second end. The inlet 222 is disposed near the first end, and the outlet 223 is disposed near the second end. After the fluid enters the channel 221 from the inlet 222, the fluid flows in a direction away from the blocking member 23 under the blocking of the first end of the blocking member 23, roughly surrounds the accommodation space 21, reaches the second end of the blocking member 23, and then is output to the external environment from the outlet 223. Herein, "roughly surround" means that the flow path of the fluid in the channel 221 can be roughly around the accommodation space 21 for one week, or can be in a manner of multiple annular laminations similar to surround the accommodation space 21 for multiple weeks, or can be in a manner of spiral similar to surround the accommodation space 21 for multiple weeks.

[0116] In some examples, the channel 221 is a single-layer structure surrounding the outer periphery of the accommodation space 21. After the fluid enters the channel 221 from the inlet 222, the fluid flows in a direction away from the blocking member 23 under the blocking of the first end of the blocking member 23, roughly surrounds the accommodation space 21 for one week, reaches the second end of the blocking member 23, and then is output to the external environment from the outlet 223.

[0117] In some examples, the channel 221 is a multi-layer structure surrounding the outer periphery of the accommodation space 21. Among them, it can be, but is not limited to, a two-layer structure, a three-layer structure, a four-layer structure, etc. Hereinafter, the channel 221 being a two-layer structure surrounding the outer periphery of the accommodation space 21 will be taken as an example for description. The channel 221 includes a first sub-channel 2211a and a second sub-channel 2211b that are laminated in a direction intersecting with the extending direction of the channel 221. Both the first sub-channel 2211a and the second sub-channel 2211b surround the outer periphery of the accommodation space 21. The first sub-channel 2211a and the second sub-channel 2211b are communicated through a communication hole 241. The communication hole 241 is disposed near the blocking member 23. The inlet 222 corresponds to the first sub-channel 2211a, and the outlet 223 corresponds to the second sub-channel 2211b. After the fluid enters the first sub-channel 2211a from the inlet 222, the fluid flows in the first sub-channel 2211a in a direction away from the blocking member 23 under the blocking of the first end of the blocking member 23. The fluid flows circumferentially along the accommodation space 21 in the first sub-channel 2211a and roughly surrounds the accommodation space 21 for one week and then reaches the blocking member 23, and then enters the second sub-channel 2211b from the communication hole 241. The fluid flows in the second sub-channel 2211b in a direction away from the blocking member 23 under the blocking of the blocking member 23. The fluid flows circumferentially along the accommodation space 21 in the second sub-channel 2211b and roughly surrounds the accommodation space 21 for one week again and then reaches the second end of the blocking member 23, and then is output to the external environment from the outlet 223.

[0118] The blocking member 23 can be detachably connected to the inner wall of the frame 22 or integrally provided on the inner wall of the frame 22. The blocking member 23 can be directly connected to the inner wall of the frame 22 or restricted on the inner wall of the frame 22 through other components. As an example, the connection method between the blocking member 23 and the inner wall of the frame 22 can be, but is not limited to, bolt connection, welding, riveting, snap connection, or bonding, etc.

[0119] Optionally, the blocking member 23 can be, but is not limited to, a plate-like structure, a block-like structure, a columnar structure, or a film-like structure, etc.

[0120] Optionally, the blocking member 23 can be made of, but is not limited to, metal or non-metal materials. For example, the metal materials can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, or stainless steel, etc., and the non-metal materials can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide, or polyamide, etc.

[0121] In some examples, the blocking member 23 and the frame 22 are made of the same material, which can simplify the preparation process flow and is beneficial to cost reduction.

[0122] Optionally, the shape of the inlet 222 can be, but is not limited to, circular, rectangular, oval, triangular, or trapezoidal, etc., and the shape of the outlet 223 can be, but is not limited to, circular, rectangular, oval, triangular, or trapezoidal, etc., and can be selected according to the actual application environment.

[0123] Optionally, the number of inlets 222 can be one or more, and the number of outlets 223 can be one or more, and can be selected according to the actual application environment.

[0124] When an abnormality occurs in the battery device 2, the fluid generated inside the battery device 2 can enter the channel 221 through the inlet 222, flow in the channel 221 to the outlet 223, and then be discharged to the outside of the battery device 2 through the outlet 223. Among them, the fluid can be gas or liquid.

[0125] In some examples, when a thermal runaway occurs in the battery cell 10 in the battery device 2, there will be a large amount of high-temperature gas in the accommodation space 21 of the battery device 2. At the same time, there will also be some impurities such as metal particles doped in the high-temperature gas.

[0126] In some examples, when electrolyte leakage occurs in the battery cell 10 in the battery device 2, there will be a large amount of electrolyte in the accommodation space 21 of the battery device 2. At the same time, there will also be some impurities such as metal particles doped in the electrolyte.

[0127] It should be noted that when a thermal runaway occurs in the battery cell 10 in the battery device 2, while generating a large amount of high-temperature gas, it is also likely to cause electrolyte leakage.

[0128] The blocking member 23 of the above technical solution can block the flow of the fluid, and can provide a flow path that generally surrounds the accommodation space 21 for the fluid flowing from the inlet 222 to the outlet 223, thereby extending the flow path and time of the fluid in the channel 221. This enables the fluid to effectively reduce its own temperature in the channel 221. At the same time, impurities such as metal particles doped in the fluid can be better precipitated in the channel 221, thereby reducing the risk of damage to other components located outside the battery device 2 and the risk of causing greater environmental pollution after the fluid is discharged to the outside of the battery device 2. In this way, the impact on the external environment when the battery device 2 malfunctions can be effectively reduced.

[0129] Figure 10 It is a schematic top view structure diagram of another box body 20 provided by some embodiments of the present application. Figure 11 is Figure 10 a schematic cross-sectional structure diagram along C-C. Figure 12 It is a schematic perspective structure diagram of another box body 20 provided by some embodiments of the present application. Figure 13 is Figure 12 a partial enlarged structure diagram at the H position of Figure 14 is Figure 12 a schematic diagram of the fluid flow direction in the box body 20 shown in Figure 15 It is an exploded structure diagram of another box body 20 provided by some embodiments of the present application. Figure 16 is Figure 15 a three-dimensional structure diagram of the beam body 25 of the box body 20 shown in Figure 17 It is a schematic top view structure diagram of still another box body 20 provided by some embodiments of the present application. Figure 18 is Figure 17 a schematic cross-sectional structure diagram along D-D.

[0130] Continuing to refer to Figures 10 to 18 , in some embodiments, the box body 20 further includes a partition member 24. The partition member 24 is disposed in the channel 221 and divides the channel 221 into N sub-channels 2211 along a direction intersecting the extension direction of the channel 221. The inlet 222 and the outlet 223 are respectively arranged corresponding to different layers of the sub-channels 2211, and N is greater than or equal to 2. Communication holes 241 are formed on the partition member 24, and adjacent two layers of sub-channels 2211 are communicated through the communication holes 241.

[0131] The separating member 24 can separate the channel 221 into N sub-channels 2211 in a direction intersecting the extending direction of the channel 221, where N can be, but is not limited to, 2, 3, 4, 5, 6, etc. The housing 20 can include N - 1 separating members 24, and the N - 1 separating members 24 are spaced apart in a direction intersecting the extending direction of the channel 221 to separate the channel 221 into N sub-channels 2211 in a direction intersecting the extending direction of the channel 221.

[0132] Taking the example that the separating member 24 can separate the channel 221 into two sub-channels 2211 in a direction intersecting the extending direction of the channel 221, the following description is provided.

[0133] Exemplarily, the separating member 24 separates the channel 221 into a first sub-channel 2211a and a second sub-channel 2211b that are stacked in a direction intersecting the extending direction of the channel 221. Both the first sub-channel 2211a and the second sub-channel 2211b surround the outer periphery of the accommodation space 21, and the first sub-channel 2211a and the second sub-channel 2211b are connected through a communication hole 241. After the fluid enters the first sub-channel 2211a from the inlet 222, the fluid flows in the first sub-channel 2211a in a direction away from the blocking member 23 under the blocking of the blocking member 23. After the fluid flows circumferentially along the accommodation space 21 in the first sub-channel 2211a to reach the position of the first hole 241a, the fluid enters the second sub-channel 2211b through the communication hole 241. The fluid flows circumferentially along the accommodation space 21 in the second sub-channel 2211b to reach the blocking member 23, and then is output to the external environment from the outlet 223.

[0134] The separating member 24 can be detachably connected to the inner wall of the frame 22, or can be integrally provided on the inner wall of the frame 22. The separating member 24 can be directly connected to the inner wall of the frame 22, or can be restricted on the inner wall of the frame 22 through other components. As an example, the connection method between the separating member 24 and the inner wall of the frame 22 can be, but is not limited to, bolt connection, welding, riveting, clamping, or bonding, etc.

[0135] Optionally, the separating member 24 can be, but is not limited to, a plate-like structure, a block-like structure, a columnar structure, or a film-like structure, etc.

[0136] Optionally, the separating member 24 can be made of, but is not limited to, metal or non-metal materials. For example, the metal materials can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, or stainless steel, etc., and the non-metal materials can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide, or polyamide, etc.

[0137] In some examples, the separating component 24 and the frame 22 are made of the same material, which can simplify the preparation process flow and is beneficial to cost reduction.

[0138] Optionally, the shape of the communication hole 241 can be, but is not limited to, circular, rectangular, oval, triangular, trapezoidal, etc., and can be selected according to the actual application environment.

[0139] Optionally, the number of the communication holes 241 can be one or more, and can be selected according to the actual application environment.

[0140] Through the above technical solution, by setting the separating component 24, the flow path and time of the fluid in the channel 221 can be further extended, so that the influence on the external environment when the battery device 2 has an abnormality can be further reduced.

[0141] In some embodiments, the separating component 24 divides the channel 221 into N sub-channels 2211 in a direction perpendicular to the extending direction of the channel 221.

[0142] In some embodiments, the cross-sectional shape of the sub-channel 2211 in the direction perpendicular to the extending direction of the channel 221 can be, but is not limited to, rectangular, square, parallelogram, triangular, circular, etc.

[0143] In some embodiments, the flow path surrounds the accommodation space 21 approximately N times.

[0144] In other words, the communication hole 241 is arranged close to the blocking component 23. Taking the example that the above separating component 24 can divide the channel 221 into two sub-channels 2211 in a direction intersecting with the extending direction of the channel 221 for illustration.

[0145] Exemplarily, the separating member 24 separates the channel 221 into a first sub-channel 2211a and a second sub-channel 2211b that are stacked in a direction intersecting the extending direction of the channel 221. Both the first sub-channel 2211a and the second sub-channel 2211b surround the outer periphery of the accommodation space 21, and are communicated through a communication hole 241 between the first sub-channel 2211a and the second sub-channel 2211b. After the fluid enters the first sub-channel 2211a from the inlet 222, the fluid flows in the first sub-channel 2211a in a direction away from the blocking member 23 under the blocking of the blocking member 23. The fluid flows circumferentially along the accommodation space 21 in the first sub-channel 2211a and reaches the blocking member 23 after flowing approximately one week around the accommodation space 21, and then enters the second sub-channel 2211b from the communication hole 241. The fluid flows in the second sub-channel 2211b in a direction away from the blocking member 23 under the blocking of the blocking member 23. The fluid flows circumferentially along the accommodation space 21 in the second sub-channel 2211b and reaches the blocking member 23 after flowing approximately one week around the accommodation space 21 again, and then is output to the external environment from the outlet 223.

[0146] Thus, the above technical solution can further extend the flow path and time of the fluid in the channel 221, thereby further reducing the impact on the external environment when the battery device 2 malfunctions.

[0147] In some embodiments, the separating member 24 includes a first separating member 24a and a second separating member 24b. The first separating member 24a and the second separating member 24b are spaced apart in a direction intersecting the extending direction of the channel 221, and separate the channel 221 into a first sub-channel 2211a, a second sub-channel 2211b, and a third sub-channel 2211c that are stacked in a direction intersecting the extending direction of the channel 221. The second sub-channel 2211b is located between the first sub-channel 2211a and the third sub-channel 2211c. The communication hole 241 includes a first hole 241a and a second hole 241b. The first hole 241a is provided on the first separating member 24a, and the first sub-channel 2211a and the second sub-channel 2211b are communicated through the first hole 241a. The second hole 241b is provided on the second separating member 24b, and the second sub-channel 2211b and the third sub-channel 2211c are communicated through the second hole 241b. The inlet 222 is provided corresponding to one of the first sub-channel 2211a and the third sub-channel 2211c, and the outlet 223 is provided corresponding to the other of the first sub-channel 2211a and the third sub-channel 2211c.

[0148] The inlet 222 is provided corresponding to one of the first sub-channel 2211a and the third sub-channel 2211c. It can be understood that the inlet 222 is directly connected to one of the first sub-channel 2211a and the third sub-channel 2211c, that is, the inlet 222 is provided on the frame 22 enclosing one of the first sub-channel 2211a and the third sub-channel 2211c. The outlet 223 is provided corresponding to the other of the first sub-channel 2211a and the third sub-channel 2211c. It can be understood that the outlet 223 is directly connected to the other of the first sub-channel 2211a and the third sub-channel 2211c, that is, the outlet 223 is provided on the frame 22 enclosing the other of the first sub-channel 2211a and the third sub-channel 2211c.

[0149] In some examples, the inlet 222 is provided corresponding to the first sub-channel 2211a, and the outlet 223 is provided corresponding to the third sub-channel 2211c.

[0150] In some examples, the inlet 222 is provided corresponding to the third sub-channel 2211c, and the outlet 223 is provided corresponding to the first sub-channel 2211.

[0151] Exemplarily, taking the inlet 222 being provided corresponding to the first sub-channel 2211a and the outlet 223 being provided corresponding to the third sub-channel 2211c as an example for description, the first sub-channel 2211a, the second sub-channel 2211b, and the third sub-channel 2211c all surround the outer periphery of the accommodation space 21. After the fluid enters the first sub-channel 2211a from the inlet 222, the fluid flows in the first sub-channel 2211a in a direction away from the blocking member 23 under the blocking of the blocking member 23. After the fluid flows circumferentially along the accommodation space 21 in the first sub-channel 2211a to reach the position of the first hole 241a, it enters the second sub-channel 2211b through the first hole 241a. After the fluid flows circumferentially along the accommodation space 21 in the second sub-channel 2211b to reach the position of the second hole 241b, it enters the third sub-channel 2211c through the second hole 241b. The fluid flows circumferentially along the accommodation space 21 in the third sub-channel 2211c to reach the blocking member 23, and then is output to the external environment from the outlet 223.

[0152] Optionally, the first partition 24a and the second partition 24b may have the same structural shape, or may have different structural shapes. The first partition 24a and the second partition 24b may be made of the same material, or may be made of different materials.

[0153] Optionally, the first hole 241a and the second hole 241b may have the same shape, or may have different shapes.

[0154] By setting the channel 221 as a three-layer structure including a first sub-channel 2211a, a second sub-channel 2211b, and a third sub-channel 2211c, the above technical solution can further extend the flow path of the fluid in the channel 221, thereby further reducing the impact on the external environment when the battery device 2 malfunctions.

[0155] In some embodiments, the first partition 24a and the second partition 24b are arranged at intervals along the height of the box body 20. The first sub-channel 2211a is located at the bottom of the box body 20, and the third sub-channel 2211c is located at the top of the box body 20. The inlet 222 is arranged corresponding to the first sub-channel 2211a, and the outlet 223 is arranged corresponding to the third sub-channel 2211c.

[0156] When the fluid enters the second sub-channel 2211b from the first sub-channel 2211a, since the second sub-channel 2211b is located above the first sub-channel 2211a, impurities such as some metal particles doped in the fluid will fall into the first sub-channel 2211a under the action of gravity, so as to reduce the content of impurities such as metal particles in the fluid entering the second sub-channel 2211b. When the fluid enters the third sub-channel 2211c from the second sub-channel 2211b, since the third sub-channel 2211c is located above the second sub-channel 2211b, impurities such as some metal particles doped in the fluid will further fall into the second sub-channel 2211b under the action of gravity, so as to reduce the content of impurities such as metal particles in the fluid entering the third sub-channel 2211c.

[0157] In this way, the above technical solution can effectively reduce the content of impurities such as metal particles in the fluid discharged to the outside of the battery device 2, thereby further reducing the impact on the external environment.

[0158] In some embodiments, both the first hole 241a and the second hole 241b are arranged close to the blocking member 23. The inlet 222 is arranged corresponding to the first sub-channel 2211a, and the outlet 223 is arranged corresponding to the third sub-channel 2211c. The inlet 222 and the first hole 241a are respectively located on opposite sides of the blocking member 23 along the extension direction of the first sub-channel 2211a. The first hole 241a and the second hole 241b are respectively located on opposite sides of the blocking member 23 along the extension direction of the second sub-channel 2211b. The second hole 241b and the outlet 223 are respectively located on opposite sides of the blocking member 23 along the extension direction of the third sub-channel 2211c.

[0159] Exemplarily, after the fluid enters the first sub-channel 2211a from the inlet 222, the fluid flows in the first sub-channel 2211a in a direction away from the blocking member 23 under the blocking of the blocking member 23. The fluid flows circumferentially along the accommodation space 21 in the first sub-channel 2211a and reaches the blocking member 23 after roughly surrounding the accommodation space 21 once, and then enters the second sub-channel 2211b through the first hole 241a; the fluid flows in the second sub-channel 2211b in a direction away from the blocking member 23 under the blocking of the blocking member 23. The fluid flows circumferentially along the accommodation space 21 in the second sub-channel 2211b and reaches the blocking member 23 after roughly surrounding the accommodation space 21 a second time, and then enters the third sub-channel 2211c through the second hole 241b; the fluid flows in the third sub-channel 2211c in a direction away from the blocking member 23 under the blocking of the blocking member 23. The fluid flows circumferentially along the accommodation space 21 in the third sub-channel 2211c and reaches the blocking member 23 after roughly surrounding the accommodation space 21 a third time, and then is output to the external environment through the outlet 223.

[0160] By arranging both the first hole 241a and the second hole 241b close to the blocking member 23, the above technical solution can further extend the flow path of the fluid in the channel 221, thereby further reducing the impact on the external environment when the battery device 2 malfunctions.

[0161] Figure 19 Another exploded structural schematic diagram of the box body 20 provided by some embodiments of the present application.

[0162] Continue to refer to Figure 19 , in some embodiments, the blocking member 23 includes a first blocking member 23a, a second blocking member 23b, and a third blocking member 23c. The first blocking member 23a is disposed in the first sub-channel 2211a and divides the first sub-channel 2211a along the extension direction of the first sub-channel 2211a. The second blocking member 23b is disposed in the second sub-channel 2211b and divides the second sub-channel 2211b along the extension direction of the second sub-channel 2211b. The third blocking member 23c is disposed in the third sub-channel 2211c and divides the third sub-channel 2211c along the extension direction of the third sub-channel 2211c.

[0163] Exemplarily, after the fluid enters the first sub-channel 2211a from the inlet 222, the fluid flows in the first sub-channel 2211a in a direction away from the first blocking member 23a under the blocking on one side of the first blocking member 23a. The fluid flows circumferentially along the accommodation space 21 in the first sub-channel 2211a and reaches the other side of the first blocking member 23a after approximately surrounding the accommodation space 21 once, and then enters the second sub-channel 2211b through the first hole 241a; the fluid flows in the second sub-channel 2211b in a direction away from the second blocking member 23b under the blocking on one side of the second blocking member 23b. The fluid flows circumferentially along the accommodation space 21 in the second sub-channel 2211b and reaches the other side of the second blocking member 23b after approximately surrounding the accommodation space 21 for the second time, and then enters the third sub-channel 2211c through the second hole 241b; the fluid flows in the third sub-channel 2211c in a direction away from the third blocking member 23c under the blocking on one side of the third blocking member 23c. The fluid flows circumferentially along the accommodation space 21 in the third sub-channel 2211c and reaches the other side of the third blocking member 23c after approximately surrounding the accommodation space 21 for the third time, and then is output to the external environment through the outlet 223.

[0164] Optionally, the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c may have the same structural shape or different structural shapes. The first blocking member 23a, the second blocking member 23b, and the third blocking member 23c may be made of the same material or different materials.

[0165] By setting the blocking member 23 as a split structure including the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c, the above technical solution can flexibly adjust the structure or position of the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c according to different requirements, thereby improving the flexibility and applicability of the setting of the blocking member 23.

[0166] In some embodiments, in the stacking direction of the first sub-channel 2211a, the second sub-channel 2211b, and the third sub-channel 2211c, the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c at least partially overlap. This makes the positions of the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c on the box body 20 approximately the same, reducing the structural complexity and facilitating maintenance.

[0167] In some embodiments, the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c are set as one body.

[0168] On the one hand, there is no need to connect the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c through an additional connection process, which simplifies the manufacturing process flow. At the same time, compared with connecting the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c through an additional connection process, the first blocking member 23a, the second blocking member 23b, and the third blocking member 23c in an integrated structure have higher connection firmness.

[0169] In some embodiments, the opening area of the communication hole 241 is 50 mm 2 -3000 mm 2 .

[0170] As an example, the opening area of the communication hole 241 can be, but is not limited to, 50 mm 2 , 100 mm 2 , 200 mm 2 , 300 mm 2 , 400 mm 2 , 500 mm 2 , 600 mm 2 , 700 mm 2 , 800 mm 2 , 900 mm 2 , 1000 mm 2 , 1500 mm 2 , 2000 mm 2 , 2500 mm 2 , 3000 mm 2 and so on.

[0171] The larger the opening area of the communication hole 241, the faster the rate at which the fluid flows from one sub-channel 2211 in the multi-layer sub-channel 2211 to another sub-channel 2211, the shorter the time for the fluid to flow in the channel 221, and the worse the improvement effect of the fluid; at the same time, the lower the risk of excessive pressure in the frame 22 caused by the fluid gathering in the channel 221. The smaller the opening area of the communication hole 241, the slower the rate at which the fluid flows from one sub-channel 2211 in the multi-layer sub-channel 2211 to another sub-channel 2211, the longer the time for the fluid to flow in the channel 221, and the better the improvement effect of the fluid; at the same time, the greater the risk of excessive pressure in the frame 22 caused by the fluid gathering in the channel 221.

[0172] In this way, by setting the opening area of the communication hole 241 within the above range, the above technical solution can make the overall flow time of the fluid in the channel 221 within a suitable range, so as to reduce the impact on the external environment when the battery device 2 generates an abnormality while taking into account reducing the risk of excessive pressure generated inside the frame 22.

[0173] In some embodiments, the opening area of the communication hole 241 is 200 mm 2 -1300 mm 2 . It can further improve the comprehensive effect of reducing the impact on the external environment when the battery device 2 has an abnormality and reducing the risk of excessive pressure generated inside the frame 22.

[0174] As an example, the opening area of the communication hole 241 can be, but is not limited to, 200 mm 2 , 250 mm 2 , 300 mm 2 , 350 mm 2 , 400 mm 2 , 450 mm 2 , 500 mm 2 , 550 mm 2 , 600 mm 2 , 650 mm 2 , 700 mm 2 , 750 mm 2 , 800 mm 2 , 850 mm 2 , 900 mm 2 , 950 mm 2 , 1000 mm 2 , 1100 mm 2 , 1200 mm 2 , 1300 mm 2 etc.

[0175] In some embodiments, the area of the cross-section of the sub-channel 2211 perpendicular to the extending direction of the sub-channel 2211 is 50 mm 2 -3000 mm 2 .

[0176] As an example, the area of the cross-section of the sub-channel 2211 perpendicular to the extending direction of the sub-channel 2211 can be, but is not limited to, 50 mm 2 , 100 mm 2 , 200 mm 2 , 300 mm 2 , 400 mm 2 , 500 mm 2 , 600 mm 2 , 700 mm 2 , 800 mm 2 , 900 mm 2 , 1000 mm 2 , 1500 mm 2 , 2000 mm 2 , 2500 mm 2, 3000mm 2 etc.

[0177] The larger the area of the cross-section of the sub-channel 2211 perpendicular to the extending direction of the sub-channel 2211, the faster the rate at which the fluid flows from one layer of the multi-layer sub-channel 2211 to another layer of the sub-channel 2211, the shorter the time for the fluid to flow in the channel 221, and the worse the improvement effect of the fluid; at the same time, the lower the risk that the fluid accumulates in the channel 221 and causes excessive pressure in the frame 22. The smaller the area of the cross-section of the sub-channel 2211 perpendicular to the extending direction of the sub-channel 2211, the slower the rate at which the fluid flows from one layer of the multi-layer sub-channel 2211 to another layer of the sub-channel 2211, the longer the time for the fluid to flow in the channel 221, and the better the improvement effect of the fluid; at the same time, the greater the risk that the fluid accumulates in the channel 221 and causes excessive pressure in the frame 22.

[0178] In this way, by setting the area of the cross-section of the sub-channel 2211 perpendicular to the extending direction of the sub-channel 2211 within the above range, the above technical solution can make the overall flow time of the fluid in the channel 221 within a suitable range, so as to reduce the impact on the external environment when the battery device 2 generates an abnormality and at the same time take into account reducing the risk of excessive pressure generated inside the frame 22.

[0179] In some embodiments, the area of the cross-section of the sub-channel 2211 perpendicular to the extending direction of the sub-channel 2211 is 200mm 2 -1300mm 2 . It can further improve the trade-off effect of reducing the impact on the external environment when the battery device 2 generates an abnormality and reducing the risk of excessive pressure generated inside the frame 22.

[0180] As an example, the area of the cross-section of the sub-channel 2211 perpendicular to the extending direction of the sub-channel 2211 can be but is not limited to 200mm 2 , 250mm 2 , 300mm 2 , 350mm 2 , 400mm 2 , 450mm 2 , 500mm 2 , 550mm 2 , 600mm 2 , 650mm 2 , 700mm 2 , 750mm 2 , 800mm 2 , 850mm 2 , 900mm 2, 950 mm 2 , 1000 mm 2 , 1100 mm 2 , 1200 mm 2 , 1300 mm 2 etc.

[0181] Continuing to combine Figures 8 to 9 , in some embodiments, the frame 22 includes M beam bodies 25. The M beam bodies 25 are arranged along the outer periphery of the accommodation space 21 and are connected end to end. A cavity 251 is formed inside each beam body 25, and the cavities 251 of the M beam bodies 25 communicate with each other to form a channel 221, where M is greater than or equal to 2. The blocking member 23 is disposed at the position where the first beam body 25 and the Mth beam body 25 are connected, and separates the cavity 251 of the first beam body 25 and the cavity 251 of the Mth beam body 25 at the position where the first beam body 25 and the Mth beam body 25 are connected. The inlet 222 is disposed on the first beam body 25, and the outlet 223 is disposed on the Mth beam body 25.

[0182] Exemplarily, the M beam bodies 25 are arranged along the outer periphery of the accommodation space 21 and are connected end to end. It can be understood that, along the outer periphery of the accommodation space 21 and in a single direction, the M beam bodies 25 are arranged in sequence. Among them, the single direction can be the clockwise direction or the counterclockwise direction.

[0183] The M beam bodies 25 can be directly connected or indirectly connected through other components. As an example, the connection manner between the M beam bodies 25 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding, etc. Among them, M can be, but is not limited to, 2, 3, 4, 5 or 6, etc.

[0184] Optionally, the M beam bodies 25 can have the same structural shape or different structural shapes. The M beam bodies 25 can be made of the same material or different materials.

[0185] In some examples, the M beam bodies 25 are made of the same material, which can simplify the preparation process flow and is beneficial to cost reduction.

[0186] In some examples, the frame 22 includes four beam bodies 25, and the four beam bodies 25 are arranged along the outer periphery of the accommodation space 21 to form a rectangular frame 22.

[0187] The first beam body 25 is adjacent to the Mth beam body 25, and the blocking member 23 is disposed at the position where the first beam body 25 and the Mth beam body 25 are connected. In other words, the blocking member 23 is connected between the first beam body 25 and the Mth beam body 25. The blocking member 23 may be directly connected between the first beam body 25 and the Mth beam body 25, or the blocking member 23 may be restricted to be connected between the first beam body 25 and the Mth beam body 25 through other components.

[0188] The above technical solution forms the frame 22 by arranging M beam bodies 25, which is beneficial to reducing the assembly difficulty of the blocking member 23 and reducing the production cost.

[0189] In some embodiments, the frame 22 includes M beam bodies 25, and the M beam bodies 25 are arranged along the outer periphery of the accommodating space 21 and are connected end to end. A cavity 251 is formed inside each beam body 25, and the cavities 251 of the M beam bodies 25 communicate with each other to form a channel 221, where M is greater than or equal to 2. The blocking member 23 is disposed at the position where the first beam body 25 and the Mth beam body 25 are connected, and separates the cavity 251 of the first beam body 25 and the cavity 251 of the Mth beam body 25 at the position where the first beam body 25 and the Mth beam body 25 are connected. When the number of layers N of the sub-channel 2211 is an even number, the inlet 222 and the outlet 223 are disposed on the first beam body 25. When the number of layers N of the sub-channel 2211 is an odd number, the inlet 222 is disposed on the first beam body 25, and the outlet 223 is disposed on the Mth beam body 25.

[0190] With such an arrangement, when the number of layers of the sub-channel 2211 is certain, the flow path and time of the fluid in the channel 221 can be maximally extended.

[0191] In some embodiments, each beam body 25 includes two end faces 254 opposite to each other along its own length direction, and the M beam bodies 25 are connected end to end through the end faces 254.

[0192] Exemplarily, the cavity 251 extends along the length direction of the beam body 25, and the two end faces 254 of the beam body 25 refer to the end faces 254 having openings of the cavity 251 on the beam body 25.

[0193] The M beam bodies 25 of the above technical solution are directly connected through the end faces 254, which can not only improve the assembly efficiency, but also be beneficial to reducing the overall structural complexity of the battery device 2.

[0194] In some embodiments, the beam body 25 includes a first surface 252 and a second surface 253 opposite to each other along its own thickness direction, and each end face 254 connects the first surface 252 and the second surface 253. The dimension of the first surface 252 in the length direction is smaller than the dimension of the second surface 253 in the length direction.

[0195] Exemplarily, the first surface 252 is a surface of the beam body 25 facing the accommodation space 21, and the second surface 253 is a surface of the beam body 25 facing away from the accommodation space 21.

[0196] The above technical solution can make the two end faces 254 of the beam body 25 opposite to each other in its own length direction be inclined, which can reduce the operation difficulty of directly connecting multiple beam bodies 25 and contribute to improving production efficiency.

[0197] Continuing to combine Figures 15 to 16 In some embodiments, each beam body 25 includes a beam main body 255 and N - 1 first reinforcing ribs 256. The cavity 251 is arranged in the beam main body 255, and the N - 1 first reinforcing ribs 256 are arranged in the cavity 251. The first reinforcing ribs 256 of every two adjacent beam bodies 25 are butt - connected to form N - 1 partition members 24, and the N - 1 partition members 24 divide the channel 221 into N sub - channels 2211 along a direction intersecting with the extension direction of the channel 221. A communication hole 241 is formed in at least one of the first reinforcing ribs 256 of the first beam body 25 and the Mth beam body 25. In the sub - channel 2211 provided with the inlet 222 or the outlet 223, the communication hole 241 is located at one end of the sub - channel 2211 far from the inlet 222 or the outlet 223.

[0198] Exemplarily, the butt - connection of the first reinforcing ribs 256 of multiple beam bodies 25 means that after the first reinforcing ribs 256 of multiple beam bodies 25 are connected, there is no gap between the first reinforcing ribs 256 of two adjacent beam bodies 25, so that the sub - channels 2211 in the N layers of sub - channels 2211 are not communicated at the connection of the multiple first reinforcing ribs 256.

[0199] The first reinforcing rib 256 can be detachably connected to the inner wall of the beam main body 255, or can be integrally arranged on the inner wall of the beam main body 255. The first reinforcing rib 256 can be directly connected to the inner wall of the beam main body 255, or can be restricted on the inner wall of the beam main body 255 through other components. As an example, the connection method of the first reinforcing rib 256 to the inner wall of the beam main body 255 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding, etc.

[0200] Optionally, the first reinforcing rib 256 can be, but is not limited to, a plate - like structure body, a block - like structure body, a column - like structure body or a film - like structure body, etc.

[0201] Optionally, the first reinforcing rib 256 can be made of, but is not limited to, metal or non - metal materials. For example, the metal materials can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non - metal materials can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0202] In some examples, the beam body 255 and the first reinforcing rib 256 are integrally formed structures. On the one hand, there is no need to connect the beam body 255 and the first reinforcing rib 256 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the beam body 255 and the first reinforcing rib 256 through an additional connection process, the beam body 255 and the first reinforcing rib 256 in an integrated structure have higher connection firmness.

[0203] Optionally, the number of the first reinforcing ribs 256 of each beam body 25 can be one, two or more, and the number of the first reinforcing ribs 256 of each beam body 25 in multiple beams is the same.

[0204] A communication hole 241 is formed in at least one of the first reinforcing ribs 256 of the first beam body 25 and the Mth beam body 25. It can be understood that a communication hole 241 is formed in the first reinforcing rib 256 of one of the first beam body 25 and the Mth beam body 25, or communication holes 241 are formed in the first reinforcing ribs 256 of both the first beam body 25 and the Mth beam body 25.

[0205] The above technical solution connects the first reinforcing ribs 256 of multiple beam bodies 25 to form the partition member 24, which is beneficial to reducing the preparation difficulty of the frame 22 and reducing the production cost.

[0206] Figure 20 Another partial exploded structural view of the box body 20 provided by some embodiments of the present application Figure 21 A three-dimensional structural view of the first seal 30 provided by some embodiments of the present application.

[0207] Continue to refer to Figures 20 to 21 , in some embodiments, the box body 20 further includes a first seal 30, and the first seal 30 is clamped between the first reinforcing ribs 256 of two adjacent beam bodies 25.

[0208] Exemplarily, during the connection of M beam bodies 25, the first seal 30 is first connected to at least part of the first reinforcing ribs 256, and then the beam bodies 255 of multiple beam bodies 25 are connected, so that the first seal 30 is clamped between the first reinforcing ribs 256 of two adjacent beam bodies 25 to seal the gap between the first reinforcing ribs 256 of two adjacent beam bodies 25.

[0209] The first seal 30 can be directly connected between the first reinforcing ribs 256 of two adjacent beam bodies 25, or can be restricted between the first reinforcing ribs 256 of two adjacent beam bodies 25 through other components.

[0210] The number of the first seals 30 matches the number of the first reinforcing ribs 256. As an example, the number of the beam bodies 25 is four, each beam body 25 includes one first reinforcing rib 256, and the number of the first seals 30 is four. As another example, the number of the beam bodies 25 is four, each beam body 25 includes two first reinforcing ribs 256, and the number of the first seals 30 is eight.

[0211] Optionally, the first seal 30 can be, but is not limited to, a gasket, a sealant, or a sealing ring, etc., and can be selected according to the actual application environment.

[0212] Optionally, the first seal 30 can be made of, but is not limited to, materials such as silicone rubber, fluororubber, polytetrafluoroethylene, epoxy resin, or polyurethane.

[0213] Through the above technical solution, by setting the first seal 30, the sealed connection between two adjacent beam bodies 25 can be achieved without welding the first reinforcing ribs 256 of the two adjacent beam bodies 25, thereby reducing the overall preparation difficulty, improving the production efficiency, and reducing the cost.

[0214] In some embodiments, the first seal 30 includes a first positioning groove, and the first reinforcing rib 256 is snap-fitted into the first positioning groove.

[0215] Figure 22 This is a partial exploded structural schematic diagram of another box body 20 provided by some embodiments of the present application.

[0216] Continue to refer to Figure 22 , in some embodiments, the box body 20 further includes a plurality of connecting members 40, and the number of the connecting members 40 matches the number of the beam bodies 25. Every two adjacent beam bodies 25 are connected by the connecting members 40, a cavity 41 is formed inside the connecting members 40, and the cavities 251 of the plurality of beam bodies 25 are communicated through the cavity 41. The blocking member 23 is disposed at the position where the first beam body 25 and the Mth beam body 25 are connected by the connecting member 40.

[0217] Exemplarily, the connecting member 40 can be directly connected to the beam body 25, or can be restricted on the beam body 25 through other components. As an example, the connection manner between the connecting member 40 and the beam body 25 can be, but is not limited to, bolt connection, welding, riveting, snap connection, or bonding, etc.

[0218] The number of the connecting members 40 matches the number of the beam bodies 25. As an example, the number of the beam bodies 25 is four, and the number of the connecting members 40 is four.

[0219] In some examples, the connecting member 40 includes a connected first part and a second part. The first part is connected to one of two adjacent beam bodies 25, and the second part is connected to the other of the two adjacent beam bodies 25. There is a certain angle between the first part and the second part, and the angle can be an acute angle, a right angle or an obtuse angle.

[0220] In some examples, the angle between the first part and the second part is a right angle.

[0221] Optionally, the connecting member 40 can be made of, but not limited to, metal or non-metal materials. For example, the metal materials can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metal materials can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0222] In some examples, the connecting member 40 and the beam body 25 can be made of the same material, which helps to simplify the preparation process flow and reduce the production cost.

[0223] The blocking member 23 is disposed at the position where the first beam body 25 and the Mth beam body 25 are connected by the connecting member 40. It can be understood that the blocking member 23 is disposed between the first beam body 25 and the connecting member 40, or the blocking member 23 is disposed between the Mth beam body 25 and the connecting member 40, or the blocking member 23 is disposed in the cavity 41 of the connecting member 40.

[0224] The above technical solution can effectively reduce the connection difficulty between multiple beam bodies 25 by introducing the connecting member 40 to connect two adjacent beam bodies 25, so as to further improve the overall production efficiency of the battery device 2 and reduce the cost.

[0225] Figure 23 This is a partial exploded structural schematic diagram of another box body 20 provided by some embodiments of the present application. Figure 24 This is a three-dimensional structural schematic diagram of the cooperation between the beam body 25 and the connecting member 40 of a battery device 2 provided by some embodiments of the present application.

[0226] Continue to refer to Figures 23 to 24, in some embodiments, the beam body 25 includes a beam main body 255 and N - 1 first reinforcing ribs 256. The cavity 251 is provided in the beam main body 255, and the N - 1 first reinforcing ribs 256 are provided in the cavity 251. The connecting member 40 includes a connecting main body 42 and N - 1 second reinforcing ribs 43. The connecting main body 42 connects the beam main bodies 255 of two adjacent beam bodies 25. The cavity 41 is provided in the connecting main body 42, and the N - 1 second reinforcing ribs 43 are provided in the cavity 41. Each second reinforcing rib 43 is butt - connected to the first reinforcing ribs 256 of two adjacent beam bodies 25 to form N - 1 partition members 24. The N - 1 partition members 24 divide the channel 221 into N sub - channels 2211 in a direction intersecting with the extending direction of the channel 221. A communication hole 241 is formed in the first reinforcing rib 256 of at least one of the first beam body 25 and the Mth beam body 25. In the sub - channel 2211 provided with the inlet 222 or the outlet 223, the communication hole 241 is located at one end of the sub - channel 2211 far from the inlet 222 or the outlet 223.

[0227] Exemplarily, the meaning that the second reinforcing rib 43 is butt - connected to the first reinforcing ribs 256 of two adjacent beam bodies 25 means that after the second reinforcing rib 43 is connected to the first reinforcing ribs 256 of two adjacent beam bodies 25, there is no gap between the second reinforcing rib 43 and the first reinforcing rib 256, so that the sub - channels 2211 in the N sub - channels 2211 are not connected at the connection between the second reinforcing rib 43 and the first reinforcing rib 256.

[0228] The second reinforcing rib 43 can be detachably connected to the inner wall of the connecting main body 42 or integrally provided on the inner wall of the connecting main body 42. The second reinforcing rib 43 can be directly connected to the inner wall of the connecting main body 42 or restricted on the inner wall of the connecting main body 42 through other components. As an example, the connection method between the second reinforcing rib 43 and the inner wall of the connecting main body 42 can be, but is not limited to, bolt connection, welding, riveting, snap - connection or bonding, etc.

[0229] Optionally, the second reinforcing rib 43 can be, but is not limited to, a plate - like structure, a block - like structure, a column - like structure or a film - like structure, etc.

[0230] Optionally, the second reinforcing rib 43 can be made of, but is not limited to, metal or non - metal materials. For example, the metal materials can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non - metal materials can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0231] In some examples, the connecting body 42 and the second reinforcing rib 43 are of an integrally formed structure. On the one hand, there is no need to connect the connecting body 42 and the second reinforcing rib 43 through an additional connecting process, which simplifies the manufacturing process flow. At the same time, compared with connecting the connecting body 42 and the second reinforcing rib 43 through an additional connecting process, the connecting body 42 and the second reinforcing rib 43 in an integrated structure have higher connection firmness.

[0232] Optionally, the number of the second reinforcing ribs 43 in each connecting member 40 can be one, two or more, and the number of the second reinforcing ribs 43 matches the number of the first reinforcing ribs 256. As an example, the number of the beam bodies 25 is four, each beam body 25 includes one first reinforcing rib 256, the number of the connecting members 40 is four, and each connecting member 40 includes one second reinforcing rib 43. As another example, the number of the beam bodies 25 is four, each beam body 25 includes two first reinforcing ribs 256, the number of the connecting members 40 is four, and each connecting member 40 includes two second reinforcing ribs 43.

[0233] The above technical solution can further reduce the connection difficulty between the first reinforcing ribs 256 of multiple beam bodies 25 by arranging the second reinforcing ribs 43 to connect the first reinforcing ribs 256 of two adjacent beam bodies 25, so as to further improve the overall production efficiency of the battery device 2 and reduce the cost.

[0234] In addition, in the sub-channel 2211 provided with the inlet 222 or the outlet 223, the communication hole 241 is located at one end of the sub-channel 2211 far from the inlet 222 or the outlet 223, which can further extend the flow path of the fluid in the channel 221, thereby further reducing the impact on the external environment when the battery device 2 has an abnormality.

[0235] Figure 25 It is a partial explosion structure schematic diagram of another box body 20 provided by some embodiments of the present application. Figure 26 It is a three-dimensional structure schematic diagram of the second seal 50 provided by some embodiments of the present application.

[0236] Continue to refer to Figures 25 to 26 , in some embodiments, the box body 20 further includes a second seal 50, and the second seal 50 is connected between the second reinforcing rib 43 and the first reinforcing rib 256.

[0237] Exemplarily, during the connection process of the second reinforcing rib 43 and the first reinforcing rib 256, first connect the second seal 50 to at least one of the second reinforcing rib 43 and the first reinforcing rib 256, and then connect the beam main body 255 of the beam body 25 and the connection main body 42 of the connector 40, so that the second seal 50 is clamped between the second reinforcing rib 43 and the first reinforcing rib 256 to seal the gap between the second reinforcing rib 43 and the first reinforcing rib 256.

[0238] The second seal 50 can be directly connected between the first reinforcing rib 256 and the second reinforcing rib 43, or can be restricted between the second reinforcing rib 43 and the first reinforcing rib 256 through other components.

[0239] The number of the second seals 50 matches the number of the first reinforcing ribs 256. As an example, the number of the beam bodies 25 is four, each beam body 25 includes one first reinforcing rib 256, and the number of the second seals 50 is four. As another example, the number of the beam bodies 25 is four, each beam body 25 includes two first reinforcing ribs 256, and the number of the second seals 50 is eight.

[0240] Optionally, the second seal 50 can be but is not limited to a gasket, sealant or sealing ring, etc., and can be selected according to the actual application environment.

[0241] Optionally, the second seal 50 can be but is not limited to being made of materials such as silicone rubber, fluororubber, polytetrafluoroethylene, epoxy resin or polyurethane.

[0242] The above technical solution can achieve the sealed connection between the second reinforcing rib 43 and the first reinforcing rib 256 without welding the second reinforcing rib 43 and the first reinforcing rib 256, thereby reducing the overall preparation difficulty, improving the production efficiency and reducing the cost.

[0243] In some embodiments, the second seal 50 includes a second positioning groove, and at least one of the first reinforcing rib 256 and the second reinforcing rib 43 is snap-fitted into the second positioning groove.

[0244] Figure 27 This is a schematic perspective view of another battery device 2 provided by some embodiments of the present application.

[0245] Continue to refer to Figure 27 , in some embodiments, the battery device 2 further includes a pressure relief mechanism 60, and the pressure relief mechanism 60 is communicated with the outlet 223.

[0246] The pressure relief mechanism 60 is used to release the internal pressure when the internal pressure or temperature of the frame 22 reaches a threshold. Exemplarily, when the fluid located in the channel 221 reaches the outlet 223, the fluid can exert pressure on the pressure relief mechanism 60, and when the pressure reaches a preset threshold, the pressure relief mechanism 60 opens so that the fluid located in the channel 221 can be discharged to the outside of the battery device 2.

[0247] The pressure relief mechanism 60 can be detachably connected to the frame 22 or integrally provided on the frame 22. The pressure relief mechanism 60 can be directly connected to the frame 22 or restricted on the frame 22 through other components. As an example, the connection manner between the pressure relief mechanism 60 and the frame 22 can be but not limited to bolt connection, riveting, bonding, or snap connection, etc.

[0248] In some examples, the pressure relief mechanism 60 and the frame 22 are of an integral structure. The frame 22 is provided with a weak part, and the thickness of the weak part is smaller than the thickness of other areas on the frame 22. The pressure relief mechanism 60 is composed of the weak part and the area surrounded by the weak part.

[0249] The above technical solution sets the pressure relief mechanism 60 at the outlet 223, so that the fluid located in the channel 221 can be discharged to the outside of the battery device 2 only when certain conditions are met, in order to reduce unnecessary fluid discharge, thereby further reducing the impact on the external environment.

[0250] According to some embodiments of the present application, the present application further provides an electrical device, including the battery device 2 of any of the above solutions, and the battery device 2 is used to provide electrical energy.

[0251] If there is no special description, all implementation manners and optional implementation manners of the present application can be combined with each other to form a new technical solution. All technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0252] To better understand the battery device 2 provided by the embodiments of the present application, based on the same inventive concept, embodiments of the above battery device 2 in actual applications are provided here for illustration.

[0253] An embodiment of the present application provides a battery device 2, which includes a battery cell 10 and a box body 20. The box body 20 includes a receiving space 21 and a frame 22. The battery cell 10 is received in the receiving space 21, and the frame 22 is disposed along the outer periphery of the receiving space 21. A channel 221 is formed inside the frame 22, and the channel 221 surrounds the outer periphery of the receiving space 21. Wherein, an inlet 222 and an outlet 223 are further provided on the frame 22. The inlet 222 connects the receiving space 21 and the channel 221, and the outlet 223 connects the channel 221 and the outside of the box body 20. A blocking member 23 is further disposed in the channel 221. The blocking member 23 divides the channel 221 into a flow path that connects the inlet 222 and the outlet 223 and generally surrounds the receiving space 21.

[0254] The blocking member 23 in the above technical solution can block the flow of the fluid, and can provide a flow path that generally surrounds the receiving space 21 for the fluid flowing from the inlet 222 to the outlet 223, thereby extending the flow path and time of the fluid in the channel 221. So that the fluid can effectively reduce its own temperature in the channel 221. At the same time, impurities such as metal particles doped in the fluid can be better precipitated in the channel 221, thereby reducing the risk of damage to other components located outside the battery device 2 and the risk of causing greater environmental pollution after the fluid is discharged to the outside of the battery device 2. In this way, the impact on the external environment when the battery device 2 malfunctions can be effectively reduced.

[0255] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0256] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A battery cell; A box body, including a receiving space and a frame. The battery cell is received in the receiving space. The frame is disposed along the outer periphery of the receiving space. A channel is formed inside the frame, and the channel surrounds the outer periphery of the receiving space; Wherein, an inlet and an outlet are further provided on the frame. The inlet connects the receiving space and the channel, and the outlet connects the channel and the outside of the box body; A blocking member is further provided in the channel. The blocking member divides the channel into a flow path that connects the inlet and the outlet and generally surrounds the receiving space.

2. The battery device according to claim 1, wherein The box body further includes a partitioning member. The partitioning member is disposed in the channel and divides the channel into N sub-channels along a direction intersecting the extending direction of the channel. The inlet and the outlet are respectively provided corresponding to different layers of the sub-channels, and N is greater than or equal to 2; Communication holes are formed in the partitioning member, and adjacent two layers of the sub-channels are communicated through the communication holes.

3. The battery device according to claim 2, characterized in that, The flow path generally surrounds the receiving space N times.

4. The battery device according to claim 2, characterized in that, The partitioning member includes a first partitioning member and a second partitioning member. The first partitioning member and the second partitioning member are spaced apart along a direction intersecting the extending direction of the channel, and divide the channel into a first sub-channel, a second sub-channel, and a third sub-channel that are stacked along a direction intersecting the extending direction of the channel. The second sub-channel is located between the first sub-channel and the third sub-channel; The communication holes include a first hole and a second hole. The first hole is disposed on the first partitioning member, and the first sub-channel and the second sub-channel are communicated through the first hole. The second hole is disposed on the second partitioning member, and the second sub-channel and the third sub-channel are communicated through the second hole; The inlet is provided corresponding to one of the first sub-channel and the third sub-channel, and the outlet is provided corresponding to the other of the first sub-channel and the third sub-channel.

5. The battery device according to claim 4, characterized in that, The first partitioning member and the second partitioning member are spaced apart along the height of the box body. The first sub-channel is located at the bottom of the box body, and the third sub-channel is located at the top of the box body; The inlet is provided corresponding to the first sub-channel, and the outlet is provided corresponding to the third sub-channel.

6. The battery device according to claim 4, wherein Both the first hole and the second hole are disposed close to the blocking member. The inlet is provided corresponding to the first sub-channel, and the outlet is provided corresponding to the third sub-channel; The inlet and the first hole are respectively located on opposite sides of the blocking member along the extending direction of the first sub-channel. The first hole and the second hole are respectively located on opposite sides of the blocking member along the extending direction of the second sub-channel. The second hole and the outlet are respectively located on opposite sides of the blocking member along the extending direction of the third sub-channel.

7. The battery device according to claim 6, characterized in that, The blocking member includes a first blocking member, a second blocking member, and a third blocking member. The first blocking member is disposed in the first sub-channel and divides the first sub-channel along the extending direction of the first sub-channel; The second blocking member is disposed in the second sub-channel and divides the second sub-channel along the extending direction of the second sub-channel; The third blocking member is disposed in the third sub-channel and divides the third sub-channel along the extending direction of the third sub-channel.

8. The battery device according to claim 7, characterized in that, In the stacking direction of the first sub-channel, the second sub-channel, and the third sub-channel, the first blocking member, the second blocking member, and the third blocking member at least partially overlap; or, The first blocking member, the second blocking member, and the third blocking member are integrally formed.

9. The battery device according to claim 2, characterized in that, The opening area of the communication hole is 50 mm 2 - 3000 mm 2 .

10. The battery device according to claim 9, characterized in that, The opening area of the communication hole is 200 mm 2 - 1300 mm 2 .

11. The battery device according to claim 2, characterized in that, The area of the cross-section of the sub-channel perpendicular to the extending direction of the sub-channel is 50 mm 2 -3000 mm 2 .

12. The battery device according to claim 11, characterized in that, The area of the cross-section of the sub-channel perpendicular to the extension direction of the sub-channel is 200 mm 2 -1300 mm 2 .

13. The battery device according to claim 1, characterized in that, The frame includes M beam bodies, the M beam bodies are disposed along the outer periphery of the accommodating space and are connected end to end, cavities are formed inside each of the M beam bodies, and the cavities of the M beam bodies communicate with each other to form the channel, where M is greater than or equal to 2; The blocking member is disposed at the position where the first beam body and the Mth beam body are connected, and separates the cavity of the first beam body and the cavity of the Mth beam body at the position where the first beam body and the Mth beam body are connected; The inlet is disposed on the first beam body, and the outlet is disposed on the Mth beam body.

14. The battery device according to claim 2, characterized in that, The frame includes M beam bodies, the M beam bodies are disposed along the outer periphery of the accommodating space and are connected end to end, cavities are formed inside each of the M beam bodies, and the cavities of the M beam bodies communicate with each other to form the channel, where M is greater than or equal to 2; The blocking member is disposed at the position where the first beam body and the Mth beam body are connected, and separates the cavity of the first beam body and the cavity of the Mth beam body at the position where the first beam body and the Mth beam body are connected; When the number of layers N of the sub-channels is an even number, the inlet and the outlet are disposed on the first beam body; When the number of layers N of the sub-channels is an odd number, the inlet is disposed on the first beam body, and the outlet is disposed on the Mth beam body.

15. The battery device according to claim 13 or 14, characterized in that, Each of the beam bodies includes two end faces opposite to each other along its own length direction, and the M beam bodies are connected end to end through the end faces.

16. The battery device according to claim 14, wherein, Each of the beam bodies includes a beam main body and N - 1 first reinforcing ribs, the cavity is disposed in the beam main body, and the N - 1 first reinforcing ribs are disposed in the cavity; The first reinforcing ribs of every two adjacent beam bodies are butt-connected to form N - 1 separating members, and the N - 1 separating members divide the channel into N layers of sub-channels along a direction intersecting with the extending direction of the channel; The communication hole is formed on the first reinforcing rib of at least one of the first beam body and the Mth beam body; In the sub-channel provided with the inlet or the outlet, the communication hole is located at one end of the sub-channel far from the inlet or the outlet.

17. The battery device according to claim 16, wherein The box body further includes a first sealing member, and the first sealing member is clamped between the first reinforcing ribs of two adjacent beam bodies.

18. The battery device according to claim 13, wherein, The box body further includes a plurality of connecting members, and the number of the connecting members matches the number of the beam bodies; Each adjacent two of the beam bodies are connected by the connecting member, a cavity is formed inside the connecting member, and the cavities of the plurality of beam bodies are communicated through the cavity; The blocking member is disposed at a position where the first beam body and the Mth beam body are connected by the connecting member.

19. The battery device according to claim 14, characterized in that, The box body further includes a plurality of connecting members, and the number of the connecting members matches the number of the beam bodies; Each adjacent two of the beam bodies are connected by the connecting member, a cavity is formed inside the connecting member, and the cavities of the plurality of beam bodies are communicated through the cavity; The blocking member is disposed at a position where the first beam body and the Mth beam body are connected by the connecting member.

20. The battery device according to claim 19, characterized in that, The beam body includes a beam main body and N - 1 first reinforcing ribs, the cavity is disposed in the beam main body, and the N - 1 first reinforcing ribs are disposed in the cavity; The connecting member includes a connecting main body and N - 1 second reinforcing ribs, the connecting main body connects the beam main bodies of two adjacent beam bodies, the cavity is disposed in the connecting main body, and the N - 1 second reinforcing ribs are disposed in the cavity; Each second reinforcing rib is butted and connected to the first reinforcing ribs of two adjacent beam bodies to form N - 1 separating members, and the N - 1 separating members separate the channel into N sub-channels along a direction intersecting with the extending direction of the channel; The communication hole is formed in the first reinforcing rib of at least one of the first beam body and the Mth beam body; In the sub-channel provided with the inlet or the outlet, the communication hole is located at an end of the sub-channel away from the inlet or the outlet.

21. The battery device according to claim 20, wherein, The box body further includes a second sealing member, and the second sealing member is connected between the second reinforcing rib and the first reinforcing rib.

22. The battery device according to any one of claims 1-21, characterized in that, The battery device further includes a pressure relief mechanism, and the pressure relief mechanism is communicated with the outlet.

23. An electrical device, characterized in that, Including the battery device according to any one of claims 1 - 22, the battery device is used for storing or providing electric energy.

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