Battery device and electric device

Abstract

The embodiment of the application discloses a battery device and an electric device, and relates to the technical field of batteries; wherein the battery device comprises a frame structure, a plate structure and a plurality of battery monomers; the frame structure has a cavity penetrating along a first direction; the plate structure is connected to one side of the frame structure along the first direction; the battery monomers are accommodated in the cavity, and have a pressure relief structure on the side facing the plate structure; the plate structure is provided with a first air duct; and the side of the plate structure facing the battery monomers is provided with an opening arranged opposite to the pressure relief structure; when the battery monomers are in thermal runaway, the spewed material of the battery monomers can be guided to the first air duct, and then discharged to the outside through a second air duct, so as to reduce the risk of chain thermal runaway of adjacent battery monomers; by integrating the first air duct in the plate structure and the second air duct in the frame structure, it is not necessary to separately arrange an exhaust structure in the cavity, so that the space utilization is improved, and the energy density of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and particularly to battery devices and electrical devices. Background Technology

[0002] Battery cells are generally equipped with a pressure relief structure (such as an explosion-proof valve) to release high-temperature and high-pressure gas when the internal pressure of the battery cell rises abnormally, in order to prevent the battery cell from exploding. When a battery cell experiences thermal runaway, the high-temperature ejected material often carries conductive particles. When the pressure relief structure of the battery cell is located on the same side as the terminal post, the high-temperature ejected material when the battery cell experiences thermal runaway can easily spread to neighboring battery cells, which can easily cause short circuits in neighboring battery cells and increase the probability of cascading thermal runaway in neighboring battery cells. Utility Model Content

[0003] In view of the above problems, this application proposes a battery device and an electrical device to solve the problem of short circuits and chain thermal runaway caused by the diffusion of high-temperature ejected material to adjacent battery cells when a battery cell experiences thermal runaway.

[0004] In a first aspect, this application proposes a battery device, the battery device comprising: Multiple battery cells; A frame structure having a cavity extending through a first direction, wherein a plurality of battery cells are housed within the cavity; A plate structure is connected to one side of the frame structure along the first direction and seals the cavity; the battery cell has a pressure relief structure on the side facing the plate structure. The plate structure is provided with a first air passage, and the first air passage has an opening on the side facing the battery cell that is opposite to the pressure relief structure. The frame structure is provided with a second air passage, which is connected to the first air passage, and is used to discharge the ejected material from the pressure relief structure to the outside.

[0005] In the technical solution of this application embodiment, a first air channel is provided in the plate structure located on one side of the pressure relief structure, and the first air channel has a corresponding opening facing the pressure relief structure. This allows the high-temperature ejected material to be guided into the first air channel when a battery cell experiences thermal runaway and ejects high-temperature ejected material, preventing it from spreading to adjacent battery cells. This minimizes the contact between conductive particles carried in the high-temperature ejected material and adjacent battery cell terminals, electrodes, etc., thereby reducing the risk of cascading thermal runaway in the battery cell. Simultaneously, by integrating the first air channel into the plate structure and the second air channel into the frame structure, a separate exhaust structure is not required within the cavity, thus improving space utilization and increasing the energy density of the battery device. Furthermore, by providing a second air channel connected to the first air channel within the frame structure, the emission path of the high-temperature ejected material is extended, allowing the temperature of the material to gradually decrease as it moves along the air channel. This effectively reduces the temperature of the ejected material when it is discharged, thereby reducing thermal radiation and thermal shock to external components of the battery device.

[0006] In one embodiment, the plate structure includes a plate body and a first liner plate, the first liner plate being sealed to the side of the plate body facing the battery cell; the first liner plate having a first protrusion protruding towards the battery cell, the first protrusion plate and the plate body forming a first air passage, and the opening being provided in the first protrusion plate.

[0007] In the technical solution of this application embodiment, the first liner is sealed and connected to the side of the plate body facing the battery cell. The first liner has a first protrusion protruding towards the battery cell. The first protrusion and the plate body form a first air passage. The first air passage is formed by the plate body and the first liner. There is no need to set up a separate exhaust pipe. The space utilization is high and it is beneficial to improve the energy density of the battery device.

[0008] In one embodiment, the first liner includes an insulating structural member; or, the first liner includes a metal structural member, and the surface of the first liner is coated with an insulating layer.

[0009] In the technical solution of this application embodiment, the first liner includes an insulating structural component; or, the first liner includes a metal structural component and its surface is coated with an insulating layer. Through the above arrangement, the first liner can both form a first air passage with the plate body and ensure electrical insulation between it and the battery cell, thereby reducing the safety risks caused by the first liner being charged.

[0010] In one embodiment, the plate structure is disposed on top of the battery device along the first direction.

[0011] In the technical solution of this application embodiment, the plate structure is disposed on the top of the battery device, that is, the plate structure is the cover plate of the battery device. The plate structure serves as the cover plate of the battery device to close the cavity, and also as the carrier for setting the exhaust channel, thereby realizing multi-functional integration.

[0012] In one embodiment, the battery device further includes a seal sandwiched between the plate structure and the battery cell to form a sealed channel between the opening and the pressure relief structure.

[0013] In the technical solution of this application embodiment, the sealing element is disposed between the plate structure and the surface of the battery cell facing the plate structure, and is arranged around the opening and the pressure relief structure, so that a closed flow channel is formed between the two, so that the high-temperature ejected material released by the pressure relief structure can directly enter the opening without diffusing into the gap between the battery cell and the plate structure.

[0014] In one embodiment, the seal includes an adhesive.

[0015] In the technical solution of this application embodiment, the sealing element includes an adhesive element, which can bond the battery cell to the plate structure together. That is, the adhesive element is disposed at the contact interface between the plate structure and the battery cell, which serves both as a seal and as an adhesive fixing function. The battery cell and the plate structure are fixedly connected by the adhesive element to form an integral force-bearing structure, which improves the battery device's ability to resist deformation and vibration, and reduces the risk of battery cell displacement caused by vibration or impact.

[0016] In one embodiment, a plurality of battery cells are arranged sequentially along a second direction to form a battery cell assembly, and a plurality of battery cell assemblies are arranged sequentially along a third direction to form a battery module; a first air passage extends along the second direction, and a plurality of first air passages are provided, and the plurality of first air passages are spaced apart along the third direction and respectively connected to the second air passage; the second direction and the third direction are both perpendicular to the first direction, and the second direction intersects the third direction.

[0017] In the technical solution of this application embodiment, the first air passage extends along the second direction, so that each first air passage can cover the battery cell assembly composed of multiple battery cells stacked along the second direction; at the same time, there are multiple first air passages, which are spaced apart along the third direction, so that the multiple first air passages can cover the multiple battery cell assemblies arranged sequentially along the third direction in the cavity. Each first air passage works independently and collects the high-temperature ejected material ejected by thermal runaway of the corresponding battery cell assembly.

[0018] In one embodiment, the frame structure includes two first beams spaced apart along a second direction and two second beams spaced apart along a third direction, with the first beams and the second beams connected end to end in sequence; the second air passage is disposed in the first beams and / or the second beams, and the second direction and the third direction are both perpendicular to the first direction, and the second direction intersects the third direction.

[0019] In the technical solution of this application embodiment, by setting a second air duct in the first beam and / or the second beam, the exhaust channel and the frame structure are integrated, resulting in high space utilization. At the same time, the second air duct can be set in the first beam and / or the second beam according to actual needs, so as to adjust the extension length of the second air duct and thus adapt to different cooling requirements.

[0020] In one embodiment, along the second direction, at least one side of the cavity is provided with a third beam extending along a third direction, the third beam abutting against one side of the battery cell along the second direction; the third beam is provided with a third air passage, the third air passage connecting the first air passage and the second air passage; the first direction, the second direction and the third direction intersect each other and are not coplanar.

[0021] In the technical solution of this application embodiment, a third beam is provided on at least one side of the cavity along the second direction, and it abuts against the side wall of the battery cell along the second direction, thereby limiting and constraining the expansion deformation of the battery cell along the second direction; a third air passage is provided in the third beam and connects the first air passage and the second air passage. By adding a third air passage between the first air passage and the second air passage, the emission path of the high-temperature ejected material is further extended, which helps to cool the high-temperature ejected material more, thereby further reducing the temperature of the high-temperature ejected material when it is discharged outward and reducing the thermal shock to surrounding components.

[0022] In one embodiment, the battery device further includes a first connector that extends through the plate structure and is fixedly connected to the third beam along the first direction.

[0023] In the technical solution of this application embodiment, the plate structure and the third beam are fixedly connected by the first connector, thereby using the plate structure and the third beam to work together to constrain the expansion deformation of the battery cell along the second direction, and jointly limit the expansion deformation of the battery cell.

[0024] In one embodiment, along the first direction, at least a portion of the plate structure contacts the third beam; the portion of the plate structure in contact with the third beam is provided with a first pressure relief port communicating with the first air passage, and the third beam is provided with a second pressure relief port communicating with the third air passage at a position corresponding to the first pressure relief port, the first pressure relief port and the second pressure relief port being sealed and communicating; along the first direction, the plate structure is provided with an insertion portion on the side facing the third beam, the insertion portion is arranged around the first pressure relief port, and at least a portion of the insertion portion is inserted into the third air passage through the second pressure relief port.

[0025] In the technical solution of this application embodiment, along the first direction, the plate structure and the third beam are at least partially in contact, and a first pressure relief port and a second pressure relief port are provided at the contact position between the two, thereby realizing the connection between the first air passage and the third air passage.

[0026] In one embodiment, the plate structure has a first flow channel for supplying heat exchange fluid, and the plate structure is at least partially thermally connected to the battery cell to exchange heat with the battery cell through the heat exchange fluid; in a plane perpendicular to the first direction, the first flow channel is offset from the first air channel.

[0027] In the technical solution of this application embodiment, by integrating the thermal management function into the plate structure, the cooling of the battery cells is achieved without excessively encroaching on the space inside the cavity, which is beneficial to improving energy density. Moreover, the flow channel and the air channel do not interfere with each other and have independent functions.

[0028] In one embodiment, the first flow channel includes a plurality of alternately connected first sub-flow channels and a plurality of second sub-flow channels; the first sub-flow channels extend along a second direction, the plurality of first sub-flow channels are spaced apart along a third direction, and the second sub-flow channels are connected between the ends of two adjacent first sub-flow channels on the same side along the second direction; along the first direction, the plate structure faces the battery cell and at least a portion of the region corresponding to the first sub-flow channel and / or the second sub-flow channel abuts against the battery cell; the first direction, the second direction, and the third direction intersect each other and are not coplanar.

[0029] In the technical solution of this application embodiment, by setting alternating first and second sub-channels, a continuous serpentine channel is formed on the side of the battery cell facing the plate structure, so as to take into account the cooling of battery cells at different positions in the cavity; at the same time, by abutting the area on the plate structure corresponding to the channel position against the battery cell, the heat exchange path between the heat exchange fluid and the battery cell is short, the thermal resistance is small, and the heat exchange effect is better.

[0030] In one embodiment, the plate structure includes a plate body and a second liner, the second liner being sealed to the side of the plate body facing away from the battery cell; the plate body facing the battery cell has a plurality of third protrusions and a plurality of fourth protrusions protruding toward the battery cell, the third protrusions and the fourth protrusions being alternately connected, the third protrusions extending along a second direction, the plurality of third protrusions being spaced apart along the third direction, and the fourth protrusions being connected between the ends of two adjacent third protrusions on the same side along the second direction; the third protrusions and the second liner form a first sub-flow channel, and the fourth protrusions and the second liner form a second sub-flow channel; the third protrusions and / or the fourth protrusions at least partially abut against the battery cell on the side facing the battery cell.

[0031] In the technical solution of this application embodiment, the alternating connection of the third protrusion and the fourth protrusion forms a first sub-flow channel between the second liner and the third protrusion, and a second sub-flow channel between the second liner and the fourth protrusion. At the same time, the second liner is connected to the side of the plate body away from the battery cell, so that the connection interface between the plate body and the second liner is located on the outside of the plate body. Even if the heat exchange fluid leaks, the leaked fluid will not enter the cavity, but will be discharged to the outside, thereby reducing the risk of contamination, corrosion or short circuit to the battery cell and improving the safety and reliability of the battery device.

[0032] In one embodiment, the third protrusion at least partially abuts against the shoulder of the battery cell on the side facing the battery cell.

[0033] In the technical solution of this application embodiment, the third protrusion at least partially abuts against the shoulder of the battery cell on the side facing the battery cell to avoid the pressure relief structure of the battery cell. At the same time, since the shoulder of the battery cell has strong rigidity, abutting the third protrusion against the shoulder can reduce the deformation of the battery cell caused by abutting against the battery cell while achieving cooling and heat dissipation.

[0034] In one embodiment, along the third direction, two adjacent shoulders of two adjacent battery cells each correspond to a first sub-channel in the first direction.

[0035] In the technical solution of this application embodiment, each of the two adjacent shoulders of two adjacent battery cells corresponds to a first sub-channel, making the first sub-channels arranged more densely, thereby improving the heat dissipation efficiency of the battery cells.

[0036] In one embodiment, along the first direction, the plate body and the corresponding areas of the two adjacent shoulders are provided with two third protrusions, and the two adjacent shoulders abut against one of the third protrusions respectively; the second liner and the two third protrusions respectively form a first sub-channel.

[0037] In the technical solution of this application embodiment, the plate body is provided with two third protrusions protruding towards the battery cell between two adjacent shoulders. The two third protrusions respectively abut against the two adjacent shoulders, thereby forming two first sub-channels with the second liner, which are used to cool the two adjacent shoulder positions respectively.

[0038] In one embodiment, along the first direction, the plate body and the corresponding areas of the two adjacent shoulders are provided with a third protrusion, and the two adjacent shoulders jointly abut against the third protrusion; the second liner and the portion of the third protrusion protrude toward the battery cell to form a fifth protrusion, and the fifth protrusion abuts against the side of the third protrusion away from the battery cell, so as to form two first sub-channels between the second liner and the third protrusion.

[0039] In the technical solution of this application embodiment, a third protrusion is provided on the side of the plate body facing the battery cell, and the third protrusion abuts against the two adjacent shoulders. The second liner has a fifth protrusion in the area corresponding to the third protrusion, which abuts against the side of the third protrusion away from the battery cell. Thus, two first sub-channels can be formed between the second liner and the third protrusion for cooling the two adjacent shoulder positions respectively.

[0040] In one embodiment, the plate structure includes a plate body and a second liner plate, the second liner plate being sealed to the side of the plate body facing the battery cell; the side of the second liner plate facing the battery cell has a sixth protrusion and a seventh protrusion protruding towards the battery cell, the sixth protrusion and the seventh protrusion being alternately connected, the sixth protrusion extending along a second direction, and having multiple sixth protrusions, the multiple sixth protrusions being spaced apart along the third direction, the seventh protrusion being connected between the ends of two adjacent sixth protrusions on the same side along the second direction; the sixth protrusion and the plate body form a first sub-flow channel, and the seventh protrusion and the plate body form a second sub-flow channel; the sixth protrusion and / or the seventh protrusion at least partially abut against the battery cell on the side facing the battery cell.

[0041] In the technical solution of this application embodiment, the sixth protrusion and the seventh protrusion are alternately connected to form a first sub-flow channel between the plate body and the sixth protrusion, and a second sub-flow channel between the plate body and the seventh protrusion. This forms a continuous serpentine flow channel on the side of the battery cell facing the plate structure, which is used to cool down the multiple battery cells in the cavity.

[0042] In one embodiment, the sixth protrusion at least partially abuts against the shoulder of the battery cell on the side facing the battery cell.

[0043] In the technical solution of this application embodiment, the sixth protrusion at least partially abuts against the shoulder of the battery cell on the side facing the battery cell to avoid the pressure relief structure of the battery cell. At the same time, since the shoulder of the battery cell has strong rigidity, abutting the sixth protrusion against the shoulder can reduce the deformation of the battery cell caused by abutting against the battery cell while achieving cooling and heat dissipation.

[0044] In one embodiment, along the third direction, two adjacent shoulders each correspond to a first sub-channel in the first direction.

[0045] In the technical solution of this application embodiment, each first sub-channel corresponds to the shoulder of a battery cell, making the first sub-channels arranged more densely, thereby improving the heat dissipation efficiency of the battery cell.

[0046] In one embodiment, along the third direction, the second liner and the corresponding areas of the two adjacent shoulders are provided with two sixth protrusions, and the two adjacent shoulders abut against one of the sixth protrusions respectively; the plate body and the two sixth protrusions respectively form a first sub-channel.

[0047] In the technical solution of this application embodiment, the second liner is provided with two sixth protrusions protruding towards the battery cell between two adjacent shoulders. The two sixth protrusions respectively abut against the two adjacent shoulders, thereby forming two first sub-channels with the plate body, which are used to cool the two adjacent shoulder positions respectively.

[0048] In one embodiment, along the third direction, the second liner and the corresponding areas of the two adjacent shoulders are provided with a sixth protrusion, and the two adjacent shoulders jointly abut against the sixth protrusion; along the first direction, the portion of the plate body corresponding to the sixth protrusion protrudes toward the battery cell to form an eighth protrusion, and the eighth protrusion abuts against the side of the sixth protrusion away from the battery cell, so as to form two first sub-channels between the plate body and the sixth protrusion.

[0049] In the technical solution of this application embodiment, a sixth protrusion is provided on the side of the second liner facing the battery cell, and the sixth protrusion abuts against the two adjacent shoulders. The plate body and the part of the sixth protrusion have an eighth protrusion that protrudes towards the battery cell. The eighth protrusion abuts against the side of the sixth protrusion away from the battery cell. Thus, two first sub-channels can be formed between the plate body and the sixth protrusion for cooling the two adjacent shoulder positions respectively.

[0050] In one embodiment, the battery device further includes an insulating thermally conductive element sandwiched between the battery cell and the plate structure.

[0051] In the technical solution of this application embodiment, the battery device further includes an insulating heat-conducting component sandwiched between the battery cell and the plate structure. The insulating heat-conducting component can conduct the heat generated by the battery cell to the plate structure to achieve heat dissipation, and can also electrically isolate the battery cell from the plate structure to prevent short circuit.

[0052] In one embodiment, the insulating thermally conductive element includes an adhesive.

[0053] In the technical solution of this application embodiment, the insulating and heat-conducting component includes an adhesive component, which, on the basis of achieving heat transfer and insulation, also plays a role in bonding and fixing; the battery cell and the plate structure are fixedly connected by the adhesive component to form an overall stress-bearing structure, which improves the battery device's ability to resist deformation and vibration, and reduces the risk of battery cell displacement caused by vibration or impact, while realizing the integration of the three functions of heat conduction, insulation and fixing.

[0054] In one embodiment, along the second direction, at least one side of the cavity is provided with a third beam extending along the third direction, and the third beam abuts against the battery cell on one side along the second direction; The battery device further includes a second connector, which passes through the plate body and the second liner along the first direction and is fixedly connected to the third beam.

[0055] In the technical solution of this application embodiment, a third beam is provided on at least one side of the cavity along the second direction, and it abuts against the side wall of the battery cell along the second direction, thereby limiting and constraining the expansion deformation of the battery cell along the second direction; at the same time, the plate body and the second liner are fixedly connected to the third beam by the second connector, thereby using the protruding structure on the plate body or the second liner as a reinforcing rib, and the three work together to achieve multiple constraints on the expansion deformation of the battery cell along the second direction, and jointly restrict the expansion deformation of the battery cell.

[0056] Secondly, this application proposes an electrical device, which includes the battery device described in the first aspect, the battery device being used to provide electrical energy.

[0057] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0058] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments; Figure 2 This is an exploded view of the battery device provided in some embodiments of this application; Figure 3 This is a top view of the battery device provided in some embodiments of this application; Figure 4 for Figure 3 Schematic diagram of the AA section structure; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B; Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point C; Figure 7 This is a schematic diagram of the plate structure in a battery device provided in some embodiments of this application; Figure 8 for Figure 3 Schematic diagram of the DD section structure; Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point E in the middle; Figure 10 For another embodiment Figure 8 Enlarged schematic diagram of the structure at point E in the middle; Figure 11 A schematic diagram illustrating the connection relationship between the first airway, the second airway, and the third airway provided in some embodiments of this application; Figure 12 This is a top view of a battery device provided in another embodiment of this application; Figure 13 for Figure 12 Schematic diagram of the FF cross-section structure; Figure 14 for Figure 13 Enlarged schematic diagram of the structure at point H; Figure 15 For another embodiment Figure 13 Enlarged schematic diagram of the structure at point H; Figure 16 For another embodiment Figure 13 Enlarged schematic diagram of the structure at point H; Figure 17 As another embodiment Figure 13 Enlarged schematic diagram of the structure at point H; Figure 18 For another embodiment Figure 13 Enlarged schematic diagram of the structure at point H; Figure 19 for Figure 12 Schematic diagram of the GG cross-section structure; Figure 20 A schematic diagram showing the structure of a third protrusion and a fourth protrusion on the main body of a plate provided in some embodiments of this application; Figure 21 A schematic diagram showing the structure of a sixth protrusion and a seventh protrusion on a second liner provided in some embodiments of this application; Figure 22 This is a schematic diagram of a structure in which a second liner is connected to the side of the plate body away from the battery cell, as provided in some embodiments of this application.

[0059] The reference numerals in the detailed embodiments are as follows: 100. Battery device; 10. Battery cell; 11. Pressure relief structure; 12. Shoulder section; 20. Frame structure; 21. First beam; 22. Second beam; 23. Cavity; 24. Second airway; 30. Plate structure; 31. Plate body; 311. Second protrusion; 312. Third protrusion; 313. Fourth protrusion; 314. Second groove; 315. Eighth protrusion; 32. First liner; 321. First protrusion; 3211. Insertion part; 322. First groove; 323. First pressure relief port; 324. Opening; 33. First air passage; 34. First flow channel; 341. First sub-flow channel; 342. Second sub-flow channel; 35. Second liner; 351. Fifth protrusion; 352. Sixth protrusion; 353. Seventh protrusion; 40. Sealing components; 50. Third beam; 51. Third air passage; 52. Second pressure relief port; 60. First connecting component; 70. Insulating and heat-conducting components; 80. Second connector; 200. Controller; 300. Motor; 1000, Vehicles. Detailed Implementation

[0060] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0062] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0063] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0064] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0065] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0067] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0068] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0069] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0070] The battery device can be a battery pack, which generally includes a housing and multiple individual battery cells housed within the housing.

[0071] Battery devices typically have exhaust channels inside the battery housing to vent the high-temperature gas emitted by the battery cells along a predetermined path when thermal runaway occurs. These exhaust channels can guide the high-temperature gas in a directional manner, preventing it from spreading disorderly within the housing and thus reducing the risk of thermal runaway propagation.

[0072] Battery cells are generally equipped with a pressure relief structure (such as an explosion-proof valve) to release high-temperature and high-pressure gas when the internal pressure of the battery cell rises abnormally, in order to prevent the battery cell from exploding. This pressure relief structure is an important device to ensure the safe operation of the battery cell. However, when a battery cell experiences thermal runaway, the high-temperature ejected material often carries conductive particles (such as molten aluminum beads, carbon powder, metal fragments, etc.). These conductive particles have high conductivity, and once they adhere to the terminals or shell surface of adjacent battery cells, they can easily cause short circuits between the positive and negative terminals or between the terminals and the shell.

[0073] When the pressure relief structure of a battery cell is located on the same side as the terminal post, the high-temperature ejected material when the battery cell experiences thermal runaway is very likely to spread to neighboring battery cells. This not only causes neighboring battery cells to be subjected to high-temperature impact, but also causes conductive particles to directly act on the terminal post, electrode, and other areas of neighboring battery cells, which can easily cause short circuits in neighboring battery cells and increase the probability of chain thermal runaway in neighboring battery cells.

[0074] Based on the above considerations, in order to reduce the risk of short circuits and cascading thermal runaway caused by the diffusion of high-temperature ejected material generated during thermal runaway of a single battery cell to adjacent battery cells, this application provides a battery device. The battery device includes multiple battery cells, a frame structure, and a plate structure. The frame structure has a cavity extending along a first direction. The plate structure is connected to one side of the frame structure along the first direction to block the cavity along the first direction. The side of the battery cell facing the plate structure has a pressure relief structure. The plate structure has a first air passage, and the side of the first air passage facing the battery cell has an opening opposite to the pressure relief structure. The frame structure has a second air passage communicating with the first air passage, which is used to discharge the high-temperature ejected material to the outside.

[0075] When a battery cell experiences thermal runaway, the high-temperature ejected material inside enters the first air duct within the plate structure through the pressure relief structure, and is then discharged to the outside through the second air duct within the frame structure, without spreading to adjacent battery cells. This ensures that the high-temperature ejected material is discharged in an orderly manner along a predetermined path, preventing disorderly diffusion of the high-temperature ejected material inside the battery device. Since the high-temperature ejected material is directed to the first and second air ducts and does not spread to adjacent battery cells, it can minimize the contact between conductive particles carried in the high-temperature ejected material and the terminals of adjacent battery cells, thereby reducing the risk of cascading thermal runaway in the battery cells.

[0076] Meanwhile, the high-temperature ejected material is directionally discharged through the first and second air passages, which also reduces the direct thermal impact of high temperature on adjacent battery cells and further reduces the possibility of thermal runaway propagation.

[0077] In this embodiment, by integrating the first air passage into the plate structure for sealing the cavity along the first direction and integrating the second air passage into the frame structure, there is no need to set up an additional exhaust structure in the cavity, thereby improving space utilization and increasing the energy density of the battery device. At the same time, it also reduces the number of components inside the battery device, simplifies the assembly process, and improves assembly efficiency.

[0078] By providing a second air passage connected to the first air passage within the frame structure, the emission path of the high-temperature ejected material is extended, so that the temperature of the high-temperature ejected material ejected during battery thermal runaway gradually decreases as it moves along the air passage. This effectively reduces the temperature of the high-temperature ejected material when it is finally discharged to the outside, thereby reducing thermal radiation and thermal shock to external components of the battery device and lowering the safety risk of thermal runaway.

[0079] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0080] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0081] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage devices, energy storage systems, and charging networks that use the battery device as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0082] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0083] Please see Figure 1 , Figure 1 The diagram illustrates the structure of a vehicle according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving.

[0084] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0085] Please see Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a frame structure 20, a plate structure 30, and a battery cell 10. The frame structure 20 has a through cavity 23, and a plate structure 30 is connected to opposite sides of the frame structure 20 along the through direction of the cavity 23, thereby sealing the cavity 23 and for mounting the battery cell 10. One plate structure 30 serves as the bottom plate of the battery device 100, and the other plate structure 30 serves as the top plate of the battery device 100.

[0086] Multiple battery cells 10 can be provided, and the multiple battery cells 10 can be connected in series, parallel, or mixed through a busbar component. As an example, multiple battery cells 10 can form a battery module, which is formed by arranging and fixing multiple battery cells 10 into an independent module. As an example, a battery module can be formed by binding multiple battery cells 10 together with cable ties.

[0087] Each battery cell 10 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 10 that can be recharged after discharge to activate its active materials and continue to be used. The battery cell 10 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. The battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0088] The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar for realizing electrical connection between multiple battery cells 10.

[0089] Please see Figure 3 and further combine Figures 4-10In a first aspect, embodiments of this application provide a battery device 100, which includes a plurality of battery cells 10, a frame structure 20, and a plate structure 30. The frame structure 20 has a cavity 23 that extends through it in a first direction, and the plurality of battery cells 10 are housed in the cavity 23. The plate structure 30 is connected to one side of the frame structure 20 in the first direction to block one side of the cavity 23 in the first direction. The side of the battery cells 10 facing the plate structure 30 has a pressure relief structure 11. The plate structure 30 has a first air passage 33, and the first air passage 33 has an opening 324 that is opposite to the pressure relief structure 11 on the side of the first air passage facing the battery cells 10 in the first direction. The frame structure 20 has a second air passage 24, and the second air passage 24 is connected to the first air passage 33 to discharge the high-temperature ejected material discharged by the pressure relief structure 11 to the outside when the battery cells 10 experience thermal runaway. The first direction Z can be the height direction of the battery cells 10, that is, the plate structure 30 is connected to the side of the frame structure 20 in the height direction of the battery cells 10.

[0090] The battery cell has a pressure relief structure 11, which is a safety device for the battery cell 10. It is used to release the high-temperature and high-pressure gas inside the battery cell 10 in a directional manner when the internal pressure rises abnormally, so as to prevent the casing of the battery cell 10 from rupturing or exploding.

[0091] The frame structure 20 and the plate structure 30 are used to form the box. Specifically, the frame structure 20 serves as the frame of the box and provides structural support, while the plate structure 30 serves as the wall panel of the box and closes the opening of the frame structure 20. Together, they form the cavity 23 that accommodates the battery cell 10.

[0092] The plate structure 30 can be the cover plate or the bottom plate of the battery device 100. The plate structure 30 is provided with a first air passage 33. The opening 324 on the first air passage 33 can be one or more. When there is one opening 324, the one opening 324 corresponds to the pressure relief structure 11 of multiple battery cells 10 at the same time. When there are multiple openings 324, the multiple openings 324 correspond to the pressure relief structure 11 of multiple battery cells 10 respectively, so as to guide the high-temperature ejected material ejected by the battery cell 10 during thermal runaway into the first air passage 33.

[0093] In this embodiment, when a battery cell 10 experiences thermal runaway, the high-temperature ejected material inside it enters the first air duct 33 located within the plate structure 30 via the pressure relief structure 11, and is discharged to the outside via the second air duct 24 located within the frame structure 20, without spreading to adjacent battery cells 10. This ensures that the high-temperature ejected material is discharged in an orderly manner along a predetermined path, preventing disorderly diffusion of the high-temperature ejected material inside the battery device 100. Since the high-temperature ejected material is directed to the first air duct 33 and the second air duct 24 and does not spread to adjacent battery cells 10, it is possible to minimize the contact between the conductive particles carried in the high-temperature ejected material and the terminals and plates of adjacent battery cells 10, thereby reducing the risk of chain thermal runaway of the battery cells 10.

[0094] Specifically, by providing a first air passage 33 within the plate structure 30, the high-temperature ejected material (carrying conductive particles) ejected from the battery cell 10 during thermal runaway is isolated from the battery cell 10 within the cavity 23. This effectively reduces the contact between the conductive particles carried in the high-temperature ejected material and electrical connectors such as the battery plate and terminal post, thereby reducing the risk of short circuits in adjacent battery cells 10 and reducing the probability of chain thermal runaway in battery cells 10.

[0095] Meanwhile, the high-temperature ejected material is directionally discharged through the first air passage 33 and the second air passage 24, which also reduces the direct thermal impact of high temperature on the adjacent battery cell 10 and further reduces the possibility of thermal runaway propagation.

[0096] In this embodiment, by integrating the first air passage 33 into the plate structure 30 for sealing the cavity 23 along the first direction and integrating the second air passage 24 into the frame structure 20, there is no need to set up an additional exhaust structure in the cavity 23. This improves space utilization and increases the energy density of the battery device 100. At the same time, it also reduces the number of components inside the battery device 100, simplifies the assembly process, and improves assembly efficiency.

[0097] Furthermore, by providing a second air passage 24 connected to the first air passage 33 within the frame structure 20, the emission path of the high-temperature ejected material is extended, so that the temperature of the high-temperature ejected material ejected during battery thermal runaway gradually decreases as it moves along the air passage. This can effectively reduce the temperature of the high-temperature ejected material when it is finally discharged to the outside, thereby reducing thermal radiation and thermal shock to the external components of the battery device 100.

[0098] By extending the emission path of high-temperature ejecta, the emission temperature can be reduced while smoke generation can also be reduced. Specifically, during the flow process, the high-temperature ejecta undergoes sufficient heat exchange with the airway wall, and the temperature of the high-temperature ejecta gradually decreases. As the temperature decreases, the conductive particles (such as molten aluminum beads, carbon powder, etc.) carried in the high-temperature ejecta gradually settle or lose their activity, and the smoke caused by the high temperature is also reduced.

[0099] In one embodiment, the plate structure 30 may be a cover plate of the battery device 100. Specifically, the cover plate is disposed on one side (top side) of the frame structure 20 along the first direction Z. The battery cell 10 is installed in the cavity 23. The pressure relief structure 11 of the battery cell 10 is disposed facing the cover plate. The first air passage 33 is disposed in the cover plate. The opening 324 is disposed opposite to the pressure relief structure 11. The first flow channel 34 is also integrated in the cover plate for thermal management of the battery cell 10.

[0100] In another embodiment, the plate structure 30 may also be the base plate of the battery device 100. Specifically, the base plate is connected to the other side (bottom side) of the frame structure 20 along the first direction Z. The battery cell 10 is installed in the cavity 23. The pressure relief structure 11 of the battery cell 10 is arranged facing the base plate. The first air passage 33 is arranged in the base plate. The opening 324 is arranged opposite to the pressure relief structure 11. The first flow channel 34 is also integrated in the base plate for thermal management of the battery cell 10.

[0101] According to some embodiments of this application, please refer to Figure 7 , Figure 8 , Figure 9 The plate structure 30 includes a plate body 31 and a first liner 32. The first liner 32 is sealed to the side of the plate body 31 facing the battery cell 10. The first liner 32 has a first protrusion 321 that protrudes towards the battery cell 10. The first protrusion 321 and the plate body 31 form a first air passage 33. An opening 324 is provided in the first protrusion 321.

[0102] In this embodiment, the first liner 32 is sealed to the side surface of the plate body 31 facing the battery cell 10, and the side of the first liner 32 facing the battery cell 10 has a first protrusion 321 protruding towards the battery cell 10. A flue groove is formed on the side of the first protrusion 321 away from the battery cell 10 (i.e. the side of the first protrusion 321 facing the plate body 31). After the flue groove is covered by the plate body 31, it forms a first air passage 33. An opening 324 is provided on the first protrusion 321 and penetrates the first protrusion 321, connecting the pressure relief structure 11 of the battery cell 10 with the first air passage 33.

[0103] In this embodiment, the first liner 32 is fixed to the side surface of the plate body 31 facing the battery cell 10 by a sealing connection, forming a sealed cavity between the two. The first protrusion 321 protrudes towards the battery cell 10, thereby expanding the space between the first protrusion 321 and the plate body 31 and forming the first air passage 33. The opening 324 is provided on the first protrusion 321, facing the pressure relief structure 11 of the battery cell 10, so that the high-temperature ejected material released by the pressure relief structure 11 can directly enter the first air passage 33.

[0104] It is understandable that the first liner 32 does not have to be a plate with the same area size as the plate body 31. That is, the size of the first liner 32 can be smaller than the plate body 31 and does not need to cover the entire area of ​​the plate body 31. Specifically, the first liner 32 only needs to be set according to the arrangement direction of the battery cells 10, that is, the arrangement direction of the pressure relief structure 11 in the cavity 23. That is, the first liner 32 can be set along the arrangement direction of the pressure relief structure 11.

[0105] For example, multiple battery cells 10 are arranged in a row along the second direction X to form a battery cell assembly. Multiple pressure relief structures 11 in the battery cell assembly are also arranged at intervals along the second direction X. Multiple rows of battery cell assemblies are arranged sequentially along the third direction Y to form a battery module.

[0106] In one embodiment, multiple first liner plates 32 may be provided, and the multiple first liner plates 32 are arranged at intervals along the arrangement direction of the battery cell assembly to correspond to multiple battery cells 10 in each row of battery cell assembly. The first liner plate 32 may be elongated and extend along the second direction X. Its length covers the distribution range of the pressure relief structure 11 of the battery cells 10 in the row of battery cell assembly, while the width only needs to meet the requirements of forming the first air passage 33 and setting the opening 324, without extending to other areas of the plate body 31.

[0107] In another embodiment, the first liner 32 may be provided, and the first liner 32 and the plate body 31 form a plurality of first air passages 33 arranged at intervals along the third direction Y.

[0108] In this embodiment, the connection between the plate body 31 and the first liner plate 32 can be achieved by welding or structural adhesive to achieve a sealed connection.

[0109] In this embodiment, the cross-sectional shape of the first airway 33 can be rectangular or trapezoidal.

[0110] According to some embodiments of this application, the first liner 32 includes an insulating structural member; or, the first liner 32 includes a metal structural member, and the surface of the first liner 32 is coated with an insulating layer.

[0111] In this embodiment, the first liner 32 can be made of insulating structural components (such as ceramic fiberboard or glass fiberboard) or metal structural components with an anti-insulation layer coated on the surface. Making the first liner 32 of insulating structural components is beneficial for weight reduction and cost reduction, while making the first liner 32 of metal structural components can provide higher structural strength and heat resistance.

[0112] This achieves the goal that the first liner 32 can both form a first air passage 33 with the main body 31 and ensure electrical insulation between it and the battery cell 10, thus avoiding safety risks caused by the first liner 32 being charged.

[0113] According to some embodiments of this application, along the first direction Z, the plate structure 30 is disposed on the top of the battery device 100.

[0114] In this embodiment, the plate structure 30 is disposed on the top of the battery device 100. That is, the plate structure 30 is the cover plate of the battery device 100. The plate structure 30 serves as the cover plate of the battery device 100 to seal the cavity 23, and also serves as the carrier for setting the exhaust channel, thus realizing multi-functional integration.

[0115] According to some embodiments of this application, please refer to Figure 9 , Figure 10 The battery device 100 also includes a seal 40, which is sandwiched between the plate structure 30 and the battery cell 10 to form a sealed channel between the opening 324 and the pressure relief structure 11.

[0116] Specifically, the sealing element 40 is disposed between the surface of the plate structure 30 facing the battery cell 10 and the surface of the battery cell 10 facing the plate structure 30, and is arranged around the opening 324 and the pressure relief structure 11. When the battery cell 10 is installed in place, the sealing element 40 is compressed to seal the gap between the opening 324 and the pressure relief structure 11, so that a sealed channel is formed between the two, allowing the high-temperature ejected material released by the pressure relief structure 11 to directly enter the opening 324 without diffusing into the gap between the battery cell 10 and the plate structure 30.

[0117] This can further reduce the probability of the high-temperature ejected material from the pressure relief structure 11 spreading to the adjacent battery cell 10, and help to better suppress the situation of chain thermal runaway.

[0118] According to some embodiments of this application, the seal 40 includes an adhesive.

[0119] In this embodiment, the sealing element 40 includes an adhesive element that can bond the battery cell 10 to the plate structure 30 together. That is, the adhesive element is disposed at the contact interface between the plate structure 30 and the battery cell 10, which serves both as a sealing function (forming a sealing channel) and as an adhesive fixing function.

[0120] Understandably, the battery cell 10 and the plate structure 30 are fixedly connected by adhesives to form an integral load-bearing structure, which improves the battery device 100's ability to resist deformation and vibration, and reduces the risk of displacement of the battery cell 10 due to vibration or impact.

[0121] In one embodiment, the seal 40 may be a structural adhesive, such as epoxy resin.

[0122] According to some embodiments of this application, please refer to Figure 4 , Figure 5 , Figure 7Multiple battery cells 10 are arranged sequentially along the second direction to form a battery cell assembly, and multiple battery cell assemblies are arranged sequentially along the third direction to form a battery module; a first air passage 33 extends along the second direction, and multiple first air passages 33 are provided, and multiple first air passages 33 are spaced apart along the third direction and are respectively connected to the second air passage 24; the second direction and the third direction are both perpendicular to the first direction Z, and the second direction intersects the third direction.

[0123] It is understood that the battery cell 10 is usually in the form of a flat cuboid structure, having a thickness direction (the thinner dimension direction), a length direction (the longer dimension direction), and a height direction (the vertical direction of the battery cell 10). The second direction can be the thickness direction of the battery cell 10, the third direction can be the length direction of the battery cell 10, and the first direction can be the height direction of the battery cell 10. That is, the second direction X is perpendicular to the third direction Y and is perpendicular to the first direction Z in pairs.

[0124] With the above arrangement, each first air duct 33 can cover multiple battery cells 10 arranged along the thickness direction, the multiple battery cells 10 arranged along the second direction X constitute a battery cell assembly, and the multiple battery cell assemblies are arranged along the third direction Y to form the entire battery module.

[0125] It is understood that the multiple first air channels 33 correspond to multiple battery cell modules arranged along the third direction Y, thereby achieving partitioned coverage of multiple battery cell modules within the battery device 100. When a battery cell 10 in a certain battery cell module experiences thermal runaway, the first air channel 33 corresponding to that battery cell module independently collects the high-temperature gas released by the pressure relief structure 11 of the battery cell 10 in that battery cell module and guides it to the second air channel 24, without interfering with the gas of other battery cell modules.

[0126] Each battery cell module corresponds to an independent first air passage 33. Each first air passage 33 is independent of the others. When a battery cell module experiences thermal runaway, the high-temperature gas it generates will not enter the first air passage 33 of the adjacent battery cell module, which helps to suppress chain thermal runaway.

[0127] In this embodiment, the plate structure 30 can be a high-temperature resistant insulating component or a metal structural component. When the plate structure 30 is a metal structural component, an insulating layer can be coated on the inner wall of the first air passage 33.

[0128] An insulating layer covers the inner surface of the first air passage 33 (including the wall surface of the plate body 31 and / or the first liner 32 that forms the first air passage 33), so that the inner wall of the first air passage 33 has electrical insulation properties.

[0129] When the battery cell 10 experiences thermal runaway, the conductive particles carried by the ejected high-temperature ejection material are prevented from contacting the metal wall of the first air passage 33 by the insulating layer. In other words, the insulating layer blocks the electrical connection between the inner wall of the first air passage 33 and the high-temperature charged particles, thereby improving the safety of the battery device 100.

[0130] According to some embodiments of this application, please refer to Figure 4 , Figure 5 , Figure 6 , Figure 11 The frame structure 20 includes two first beams 21 spaced apart along a second direction and two second beams 22 spaced apart along a third direction. The first beams 21 and the second beams 22 are connected end to end. The second air passage 24 is located in the first beams 21 and / or the second beams 22. The second direction and the third direction are both perpendicular to the first direction Z. The second direction intersects with the third direction. The first direction Z can be the height direction of the battery cell 10, the second direction X can be the thickness direction of the battery cell 10, and the third direction Y can be the length direction of the battery cell 10.

[0131] In this embodiment, by setting a second air passage 24 in the first beam 21 and / or the second beam 22, the exhaust channel and the frame structure 20 are integrated, resulting in high space utilization. At the same time, the second air passage 24 can be set in the first beam 21 and / or the second beam 22 according to actual needs, so as to adjust the extension length of the second air passage 24 and thus adapt to different cooling and heat dissipation requirements.

[0132] In one embodiment, the second air passage 24 is disposed within the first beam 21, that is, the second air passage 24 extends along the extension direction of the first beam 21. Since the two first beams 21 are spaced apart along the second direction, one end of the first air passage 33 in the length direction can communicate with the second air passage 24 in one of the first beams 21, or both ends of the first air passage 33 in the length direction can communicate with the second air passage 24 in both first beams 21 respectively.

[0133] In another embodiment, the second air passage 24 is disposed within the first beam 21 and the second beam 22, that is, the second air passage 24 is arranged along the extension direction of the first beam 21 and the second beam 22, thereby increasing the length of the second air passage 24. At this time, one end of the first air passage 33 in the length direction is connected to the second air passage 24 located in the first beam 21. When the battery cell 10 experiences thermal runaway, the high-temperature ejected material first enters the second air passage 24 in the first beam 21 through the first air passage 33, and then moves further to the second air passage 24 located in the second beam 22, and is finally discharged to the outside. This extends the discharge path of the high-temperature ejected material, which can further reduce the temperature when it is finally discharged to the outside, thereby reducing the thermal radiation and thermal shock to the external components of the battery device 100.

[0134] Alternatively, the two ends of the first air passage 33 along its length are connected to the second air passage 24 located in the two first beams 21 respectively. After the high-temperature ejected material enters the second air passage 24 in the corresponding first beam 21 from the two ends of the first air passage 33 along its length, it will move further to the second air passage 24 located in the second beam 22 and finally be discharged to the outside.

[0135] In this embodiment, a pressure relief component (e.g., an explosion-proof valve) of the battery device 100 is installed at a suitable position on the first beam 21 or the second beam 22. When the pressure of the high-temperature ejected material in the second air passage 24 reaches a certain level, the pressure relief component opens and discharges the high-temperature ejected material to the outside.

[0136] According to some embodiments of this application, please refer to Figure 4 , Figure 5 , Figure 6 Along the second direction, at least one side of the cavity 23 is provided with a third beam 50 extending along the third direction, and the third beam 50 abuts against the battery cell 10 on one side along the second direction; the third beam 50 is provided with a third air passage 51, which connects the first air passage 33 and the second air passage 24; the first direction, the second direction and the third direction intersect each other and are not coplanar, wherein the first direction Z can be the height direction of the battery cell 10, the second direction X can be the thickness direction of the battery cell 10, and the third direction Y can be the length direction of the battery cell 10.

[0137] In this embodiment, a third beam 50 extending along the third direction Y is provided on at least one side of the cavity 23 along the second direction X. The third beam 50 abuts against the side of the battery cell 10 located in the cavity 23 along the second direction X. That is, the third beam 50 and the battery cell 10 are in large-area contact, thereby achieving better constraint on the expansion deformation of the battery cell 10.

[0138] The third beam 50 is provided with a third air passage 51, which connects the first air passage 33 and the second air passage 24. By adding the third air passage 51 between the first air passage 33 and the second air passage 24, the emission path of the high-temperature ejected material is further extended, which helps to cool the high-temperature ejected material more, thereby further reducing the final temperature of the high-temperature ejected material when it is discharged outward, and reducing the thermal shock to the components around the battery device 100.

[0139] According to some embodiments of this application, the battery device 100 further includes a first connector 60, which penetrates the plate structure 30 along the first direction Z and is fixedly connected to the third beam 50. That is, the first connector 60 penetrates the plate body 31 and the first liner 32 along the first direction Z and is fixedly connected to the third beam 50.

[0140] In this embodiment, the plate body 31 and the first liner 32 are fixedly connected to the third beam 50 by the first connector 60. The protrusion structure on the first liner 32 is used as a reinforcing rib. The three work together to achieve multiple constraints on the expansion deformation of the battery cell 10 along the second direction, and jointly limit the expansion deformation of the battery cell 10.

[0141] In this embodiment, the protruding structure of the plate structure 30 itself is used as a reinforcing rib, and the plate body 31 and the first liner 32 are directly fixedly connected to the third beam 50 through the first connector 60. No additional anti-expansion components are required, reducing the connection structure. Compared with the traditional method that requires separate installation of composite material strips or anti-expansion steel strips, in this application, it is only necessary to simultaneously lock the first liner 32 and the plate body 31 to the third beam 50 through the first connector 60 while connecting the plate structure 30 to the frame structure 20, which simplifies the assembly process.

[0142] It is understandable that a third beam 50 can be provided on both sides of the cavity 23 along the second direction X. The two third beams 50 are fixedly connected to the first liner 32 and the plate body 31 respectively through the first connector 60, thereby forming a double-sided symmetrical constraint, which further improves the effect of suppressing the expansion deformation of the battery cell 10, while balancing the force and enhancing the overall structural rigidity.

[0143] In one embodiment, the first connector 60 may be a screw, bolt, or rivet, which passes through the plate body 31 and the first liner 32 and is then locked into the threaded hole of the third beam 50.

[0144] According to some embodiments of this application, please refer to Figure 6 , Figure 11 Along the first direction Z, at least a portion of the plate structure 30 contacts the third beam 50, that is, at least a portion of the first protrusion 321 contacts the third beam 50. The portion of the first protrusion 321 that contacts the third beam 50 is provided with a first pressure relief port 323 that communicates with the first air passage 33. The third beam 50 is provided with a second pressure relief port 52 that communicates with the third air passage 51 at a position corresponding to the first pressure relief port 323. The first pressure relief port 323 and the second pressure relief port 52 are sealed and communicated. Along the first direction Z, the plate structure 30 is provided with an insertion portion 3211 on the side facing the third beam 50. The insertion portion 3211 is arranged around the first pressure relief port 323, and at least a portion of the insertion portion 3211 is inserted into the third air passage 51 through the second pressure relief port 52.

[0145] In this embodiment, at least a portion of the first protrusion 321 abuts against the third beam 50 along the first direction Z. This abutting contact relationship enables a stable mechanical fit between the first protrusion 321 and the third beam 50, enhancing the connection strength between the plate structure 30 and the third beam 50, and helping to improve the overall structural rigidity of the battery device 100.

[0146] The first protrusion 321 and the third beam 50 abut against each other are provided with a first pressure relief port 323. The third beam 50 and the first pressure relief port 323 are respectively provided with a second pressure relief port 52 that communicates with the third air passage 51. This realizes the connection between the first air passage 33 and the third air passage 51. At the same time, the abutting cooperation between the first protrusion 321 and the third beam 50 can improve the connection and sealing between the first pressure relief port 323 and the second pressure relief port 52. A sealing element 40 (such as adhesive) can be provided at the abutting interface between the first protrusion 321 and the third beam 50 to improve the connection and sealing between the first air passage 33 and the third air passage 51.

[0147] Furthermore, an insertion portion 3211 extending toward the third beam 50 can be provided on the periphery of the first protrusion 321 located at the first pressure relief port 323. The insertion portion 3211 extends around the periphery of the first pressure relief port 323 and is inserted into the third air passage 51 inside the third beam 50 through the second pressure relief port 52 provided on the third beam 50 (at this time, the size of the second pressure relief port 52 is slightly larger than the size of the first pressure relief port 323, so that the insertion portion 3211 can be inserted into the third air passage 51 through the second pressure relief port 52), which can further improve the communication and sealing between the first air passage 33 and the third air passage 51.

[0148] In this embodiment, there are multiple ways to connect the third airway 51 and the second airway 24.

[0149] In one embodiment, please refer to Figure 6 , Figure 11 As shown, the third beam 50 and the adjacent first beam 21 can be fitted together. At this time, the third air passage 51 located in the third beam 50 and the second air passage 24 located in the first beam 21 extend in parallel. At this time, perforations can be opened on the opposite side of the third beam 50 and the first beam 21 to connect the parallel-extending third air passage 51 and the second air passage 24, thereby realizing the connection between the third air passage 51 and the second air passage 24.

[0150] Alternatively, the third beam 50 and the adjacent first beam 21 can be integrally formed (e.g.) Figure 6 As shown in the figure, at this time, it is only necessary to make a perforation in the beam profile wall located between the second air passage 24 and the third air passage 51 to achieve the connection between the second air passage 24 and the third air passage 51.

[0151] In another embodiment, the third beam 50 and the corresponding first beam 21 are spaced apart along the second direction X. In this case, one or both ends of the third beam 50 along its length can be connected to the second air passage 24 in the corresponding second beam 22. That is, a perforation (not shown in the figure) is provided at one or both ends of the third beam 50 along its length, and a perforation is also provided at the corresponding position of the second beam 22. The connection between the third air passage 51 and the second air passage 24 can also be achieved through the two perforations.

[0152] Please see Figure 5 , Figure 7 Along the first direction Z, the first liner 32 has a first groove 322 on the side opposite to the cavity 23 and at the position corresponding to the third beam 50. The plate body 31 has a second groove 314 on the side opposite to the cavity 23 and at the position corresponding to the first groove 322. The first connector 60 passes through the first groove 322 and the second groove 314 and is connected to the third beam 50.

[0153] In this embodiment, a first groove 322 is provided on the first liner 32, thereby forming a recessed groove structure on the side of the first groove 322 away from the cavity 23. Similarly, a second groove 314 is provided on the plate body 31, thereby forming a recessed groove structure on the side of the second groove 314 away from the cavity 23. This allows the head of the first connector 60 (such as a screw or rivet) to be accommodated in the structure without protruding from the surface of the plate structure 30, keeping the surface of the plate structure 30 flat. This reduces the probability of the first connector 60 interfering with other components and reduces the assembly difficulty.

[0154] In one embodiment, when the first liner 32 is connected to the plate body 31 on the side facing the battery cell 10, along the first direction Z, the second groove portion 314 on the side facing the cavity 23 abuts against the first groove portion 322 on the side facing away from the cavity 23, and the first groove portion 322 abuts against the third beam 50, thereby improving the connection strength between the plate structure 30 and the third beam 50.

[0155] In another embodiment, when the first liner 32 is connected to the side of the plate body 31 away from the battery cell 10, along the first direction Z, the side of the first groove 322 facing the cavity 23 abuts against the side of the second groove 314 away from the cavity 23, and the second groove 314 abuts against the third beam 50, thereby improving the connection strength between the plate structure 30 and the third beam 50.

[0156] According to some embodiments of this application, please refer to Figure 12 , Figure 13 , Figure 14The plate structure 30 is provided with a first flow channel 34 for supplying heat exchange fluid. The plate structure 30 is at least partially thermally connected to the battery cell 10 so as to exchange heat with the battery cell 10 through the heat exchange fluid. In a plane perpendicular to the first direction Z, the first flow channel 34 is staggered from the first air channel 33.

[0157] In this embodiment, the plate structure 30 is provided with a first flow channel 34 for the flow of heat exchange fluid, and the plate structure 30 is thermally connected to the battery cell 10 for heat exchange. That is, the thermal management system for cooling the battery cell 10 is also integrated on the plate structure 30, thereby realizing the simultaneous integration of an exhaust structure (first air passage 33) and a thermal management system (first flow channel 34) on the plate structure 30, achieving multi-functional integration.

[0158] In this embodiment, there is no need to separately arrange a cold plate structure 30 for cooling the battery cell 10 in the cavity 23. Compared with the traditional solution that requires a separate cold plate between the battery cell 10 and the housing, the installation space in the cavity 23 is freed up. More battery cells 10 can be accommodated without increasing the size of the battery device 100 (increasing energy density), or the overall size of the battery device 100 can be reduced without increasing the energy density of the battery device 100.

[0159] In a plane perpendicular to the first direction Z, the first flow channel 34 and the first air channel 33 are staggered. That is, when viewed along the height direction of the battery cell 10 (i.e., the first direction Z), the projections of the first flow channel 34 and the first air channel 33 on the battery device 100 are staggered, and the two do not interfere with each other and are functionally independent.

[0160] In this embodiment, at least a portion of the plate structure 30 is thermally connected to the battery cell 10, thereby enabling the heat of the battery cell 10 to be conducted through the plate structure 30 to the heat exchange flow in the first flow channel 34 and to exchange heat, thereby achieving cooling of the battery cell 10.

[0161] When a battery cell 10 experiences thermal runaway, the high-temperature ejected material enters the first air passage 33 through the pressure relief structure 11. Since the first air passage 33 and the first flow passage 34 are both integrated within the plate structure 30, and the two are adjacent or close to each other through the wall of the plate structure 30, the heat of the high-temperature ejected material can be conducted through the wall to the heat exchange fluid in the first flow passage 34 and carried away by the heat exchange fluid, thereby further reducing the temperature of the high-temperature ejected material when it is finally discharged to the outside.

[0162] In this embodiment, when the battery device 100 is in normal operating mode, the heat exchange fluid is used to absorb the heat generated by the battery cell 10 during normal operation and maintain the battery cell 10 within a suitable operating temperature range; when the battery cell 10 experiences thermal runaway, the heat exchange fluid is used to absorb the heat of the high-temperature ejected material and assist in cooling the high-temperature ejected material before emission, thereby reducing the final emission temperature.

[0163] In one embodiment, the heat exchange fluid can be a coolant, such as water or heat transfer oil.

[0164] According to some embodiments of this application, please refer to Figure 12 , Figure 13 , Figure 14 , Figure 20 The first flow channel 34 includes a plurality of alternating first sub-flow channels 341 and a plurality of second sub-flow channels 342; the first sub-flow channels 341 extend along a second direction, the plurality of first sub-flow channels 341 are spaced apart along a third direction, and the second sub-flow channels 342 are connected between the ends of two adjacent first sub-flow channels 341 on the same side along the second direction; along the first direction, at least a portion of the plate structure 30 facing the battery cell 10 and corresponding to the first sub-flow channel 341 and / or the second sub-flow channel 342 abuts against the battery cell 10; the first direction, the second direction, and the third direction intersect each other and are not coplanar, wherein the first direction Z can be the height direction of the battery cell 10, the second direction X can be the thickness direction of the battery cell 10, and the third direction Y can be the length direction of the battery cell 10.

[0165] In this embodiment, by setting alternating first sub-channels 341 and second sub-channels 342, a continuous serpentine flow channel is formed on the side of the battery cell 10 facing the plate structure 30. The heat exchange fluid flows in the serpentine flow channel and can flow through various areas of the plate structure 30, so as to take into account the cooling of the battery cells 10 at different positions in the cavity 23.

[0166] The first flow channel 34 can be provided with a heat exchange fluid inlet and a heat exchange fluid outlet at both ends of its length direction. Specifically, the heat exchange fluid inlet is provided at one end of the first flow channel 34 and the heat exchange fluid outlet is provided at the other end of the first flow channel 34, so that the heat exchange fluid flows unidirectionally along the entire length of the first flow channel 34.

[0167] In this embodiment, at least a portion of the plate structure 30 facing the battery cell 10 and corresponding to the first sub-channel 341 and / or the second sub-channel 342 abuts against the battery cell 10. Thus, by abutting at least a portion of the corresponding channel position area on the plate structure 30 against the battery cell 10, the heat exchange path between the heat exchange fluid and the battery cell 10 is short, the thermal resistance is small, and the heat exchange effect is better.

[0168] Specifically, the heat exchange fluid flows within the channel, and its heat only needs to pass through the channel wall to be transferred to the surface of the plate structure 30 and then to the battery cell 10. The path is short, which can significantly improve the heat exchange efficiency.

[0169] According to some embodiments of this application, please refer to Figures 12-16 , Figure 20 The plate structure 30 includes a plate body 31 and a second liner 35. The second liner 35 is sealed to the side of the plate body 31 facing away from the battery cell 10. The plate body 31 facing the battery cell 10 has a plurality of third protrusions 312 and a plurality of fourth protrusions 313 protruding towards the battery cell 10, and the third protrusions 312 and fourth protrusions 313 are alternately connected. The third protrusions 312 extend along a second direction, and the plurality of third protrusions 312 are spaced apart along a third direction. The fourth protrusions 313 are connected between the ends of two adjacent third protrusions 312 on the same side along the second direction. The third protrusions 312 and the second liner 35 form a first sub-flow channel 341, and the fourth protrusions 313 and the second liner 35 form a second sub-flow channel 342. The third protrusions 312 and / or the fourth protrusions 313 at least partially abut against the battery cell 10 on the side facing the battery cell 10.

[0170] In this embodiment, please refer to Figure 12 , Figure 20 When the plate body 31 is provided with alternating third protrusions 312 and fourth protrusions 313 on the side facing the battery cell 10, flow channel grooves are formed on the side of the third protrusions 312 and fourth protrusions 313 away from the battery cell 10 along the first direction Z. The third protrusions 312 and fourth protrusions 313 protrude towards the battery cell 10, and naturally form recessed flow channel grooves on their back sides (the side away from the battery cell 10). The second liner 35 is sealed and connected to the side of the plate body 31 away from the battery cell 10, thereby forming a first sub-flow channel 341 and a second sub-flow channel 342 between the second liner 35 and the third protrusions 312 and fourth protrusions 313. Since the third protrusions 312 and fourth protrusions 313 are alternately connected, the first sub-flow channel 341 and the second sub-flow channel 342 formed are also alternately connected, together constituting a serpentine flow channel.

[0171] It is understood that the second liner 35 is sealed to the side of the plate body 31 away from the battery cell 10, and is used to cover the flow channel groove to form a sealed first flow channel 34. The area of ​​the second liner 35 does not need to be the same as the area of ​​the plate body 31. That is, the second liner 35 only needs to be arranged along the extension direction of the third protrusion 312 and the fourth protrusion 313, and cover the flow channel groove formed on the side of the third protrusion 312 and the fourth protrusion 313 away from the battery cell 10.

[0172] The second liner 35 can cover only the area on the main body 31 where the flow channel is provided, without extending to other parts of the main body 31, which can reduce the use of materials, reduce costs, and reduce the overall weight of the plate structure 30.

[0173] In one embodiment, alternating third protrusions 312 and fourth protrusions 313 can be formed on the plate body 31 by stamping or molding with a die. The cross-sections of the third protrusions 312 and fourth protrusions 313 can be rectangular, trapezoidal or corrugated.

[0174] In this embodiment, the second liner 35 is connected to the side of the plate body 31 away from the battery cell 10, so that the connection interface between the plate body 31 and the second liner 35 is located on the outside of the plate body 31 (i.e., the side away from the battery cell 10). When the heat exchange fluid leaks, the leaking fluid will not enter the cavity 23, but will be discharged to the outside. Specifically, when the seal of the first flow channel 34 fails, the leaked heat exchange fluid will first enter the connection interface area between the plate body 31 and the second liner 35. Since the connection interface is located on the side of the plate body 31 away from the battery cell 10, the leaking fluid will only seep out to the outside and will not enter the cavity 23 to the inside (towards the battery cell 10). This will not affect the normal operation of the battery cell 10 in the cavity 23, reduce the risk of safety accidents caused by leakage, and improve the safety and reliability of the battery device 100.

[0175] In one embodiment, the sealing connection between the second liner 35 and the plate body 31 can be a welding connection or an adhesive connection.

[0176] According to some embodiments of this application, please refer to Figure 14 The third protrusion 312 at least partially abuts against the shoulder 12 of the battery cell 10 on the side facing the battery cell 10.

[0177] The shoulder 12 is located in the top region of the battery cell 10, and is the corner position where the top cover of the battery cell 10 casing intersects with the four side walls of the battery cell 10 casing.

[0178] In this embodiment, the third protrusion 312 at least partially abuts against the shoulder 12 of the battery cell 10 on the side facing the battery cell 10, thereby avoiding the pressure relief structure 11 and the terminal post of the battery cell 10. At the same time, since the shoulder 12 of the battery cell 10 has strong positional rigidity, abutting the third protrusion 312 against the shoulder 12 can achieve cooling and heat dissipation of the battery cell 10 while reducing the deformation of the battery cell 10 caused by abutting against it.

[0179] During the charging and discharging process of the battery cell 10, the terminal area generates a lot of heat due to the current passing through it, making it one of the areas with the largest heat generation at the top of the battery cell 10. Since the shoulder 12 is close to the terminal, when the third protrusion 312 abuts against the shoulder 12, it can form a good thermally conductive connection between the plate structure 30 (especially the first flow channel 34 within the plate structure 30) and the high-heat area of ​​the terminal, thereby achieving better cooling of the terminal of the battery cell 10.

[0180] Please continue reading. Figure 14 The third protrusion 312 has a first section facing the battery cell 10, and a second section located on both sides of the first section for connecting the first section and the plate body 31. The first section is generally planar and is used to form abutting contact with the battery cell 10. The second section is a transition connection part that connects the first section and the plate body 31 into one piece.

[0181] In one embodiment, the third protrusion 312 at least partially abuts against the shoulder 12 of the battery cell 10 on the side facing the battery cell 10, wherein the first section may abut against the shoulder 12 of the battery cell 10.

[0182] According to some embodiments of this application, please refer to Figure 14 , Figure 20 Along the third direction Y, the two adjacent shoulders 12 of two adjacent battery cells 10 correspond to a first sub-channel 341 in the first direction Z.

[0183] In this embodiment, along the third direction Y, the two adjacent shoulders 12 of two adjacent battery cells 10 correspond to a first sub-channel 341 in the first direction Z, thereby improving the cooling efficiency of the battery cells 10.

[0184] It is understandable that the two adjacent shoulders 12 of two adjacent battery cells 10 along the third direction Y correspond to a first sub-channel 341 in the height direction (first direction Z) of the battery cell 10. Since the shoulders 12 of two adjacent battery cells 10 are close in position, the corresponding first sub-channels 341 are also close and form the same group. The two first sub-channels 341 in the next group correspond to the two adjacent shoulders 12 of the next pair of adjacent battery cells 10 and maintain a large distance from the previous group.

[0185] Therefore, the arrangement of the first sub-channel 341 along the third direction Y follows the following pattern: Please see Figure 20 Two first sub-channels 341 are grouped together. The two first sub-channels 341 in the same group are relatively close to each other, and each group is set with a large distance between them along the third direction Y.

[0186] It is understandable that, since the first sub-channels 341 are arranged in groups at intervals (two in a group, with close distances within the same group and larger intervals between adjacent groups), the second sub-channel 342 is used to connect the two ends of two adjacent first sub-channels 341 on the same side along the second direction X, which will cause the lengths of the second sub-channels 342 located on both sides of the second direction X to differ.

[0187] Specifically, when the second sub-channel 342 is used to connect two first sub-channels 341 in the same group, the length of the second sub-channel 342 is shorter because the two first sub-channels 341 in the same group are close to each other (corresponding to the shoulder 12 position of two adjacent battery cells 10).

[0188] When the second sub-channel 342 is used to connect two first sub-channels 341 in different groups, the length of the second sub-channel 342 is relatively long because the first sub-channels 341 between different groups are spaced far apart.

[0189] In one embodiment, since the interval between two adjacent sets of first sub-channels 341 is large, the first air passage 33 can be set in the position region between two adjacent sets of first sub-channels 341.

[0190] Specifically, the first air passage 33 extends along the second direction X and is located in the gap area between two adjacent sets of first sub-flow passages 341. Thus, the first air passage 33 and the first flow passage 34 are staggered in the planar area of ​​the plate structure 30 and do not interfere with each other.

[0191] According to some embodiments of this application, please refer to Figure 14 Along the first direction Z, the plate body 31 and the adjacent two shoulder parts 12 are provided with two third protrusions 312 in the corresponding areas, and the two adjacent shoulder parts 12 abut against one of the third protrusions 312 respectively; the second liner 35 and the two third protrusions 312 respectively form a first sub-channel 341.

[0192] In this embodiment, the plate body 31 is provided with two third protrusions 312 protruding towards the battery cell 10 between two adjacent shoulders 12. The two third protrusions 312 respectively abut against the two adjacent shoulders 12, thereby forming two first sub-channels 341 with the second liner 35, which are used to cool and dissipate heat at the two adjacent shoulders 12 respectively.

[0193] Specifically, the second liner 35 and the plate body 31 are sealed together on the side away from the battery cell 10 without the third protrusion 312, thereby forming a first sub-channel 341 between the second liner 35 and the two third protrusions 312.

[0194] According to some embodiments of this application, please refer to Figure 15 , Figure 16Along the first direction Z, a third protrusion 312 is provided in the area corresponding to the plate body 31 and the two adjacent shoulders 12, and the two adjacent shoulders 12 together abut against the third protrusion 312; a portion of the second liner 35 corresponding to the third protrusion 312 protrudes towards the battery cell 10 to form a fifth protrusion 351, and the fifth protrusion 351 abuts against the side of the third protrusion 312 away from the battery cell 10, so as to form two first sub-channels 341 between the second liner 35 and the third protrusion 312.

[0195] In this embodiment, a third protrusion 312 protruding towards the battery cell 10 is provided on the side of the plate body 31 facing the battery cell 10, and the third protrusion 312 abuts against the two adjacent shoulders 12. The second liner 35 has a fifth protrusion 351 protruding towards the battery cell 10 in a portion of the area corresponding to the third protrusion 312. The fifth protrusion 351 abuts against the side of the third protrusion 312 away from the battery cell 10. Thus, two first sub-channels 341 can be formed between the second liner 35 and the third protrusion 312 for cooling and heat dissipation of the two adjacent shoulders 12 respectively.

[0196] Specifically, the width of the third protrusion 312 is sufficient to cover the area of ​​the two adjacent shoulders 12, and at the same time forms a support fit with the two shoulders 12. The side of the third protrusion 312 away from the battery cell 10 forms a space with the second liner 35. The fifth protrusion 351 divides this space into two independent first sub-channels 341. These two first sub-channels 341 are used to cool and dissipate heat at the positions of the two adjacent shoulders 12, respectively.

[0197] In one implementation, please refer to Figure 15 The second liner 35 is not provided with a fifth protrusion 351 and is sealed to the plate body 31 at a position where the third protrusion 312 is not provided.

[0198] In another implementation, please refer to Figure 16 The second liner 35, which does not have a fifth protrusion 351 (located on both sides of the fifth protrusion), is bent toward the battery cell 10 and sealed to the side of the third protrusion 312 away from the battery cell 10. At this time, the second liner 35 is accommodated in the flow channel groove formed on the side of the third protrusion 312 away from the battery cell 10. Similarly, two first sub-flow channels 341 can be formed between the second liner 35 and the third protrusion 312. At this time, the second liner 35 does not need to be sealed to the position on the plate body 31 where the third protrusion 312 is not provided, thereby reducing the material used of the second liner 35 and helping to reduce weight.

[0199] According to some embodiments of this application, please refer to Figure 17 , Figure 18 , Figure 21The plate structure 30 includes a plate body 31 and a second liner 35. The second liner 35 is sealed to the side of the plate body 31 facing the battery cell 10. The side of the second liner 35 facing the battery cell 10 has a sixth protrusion 352 and a seventh protrusion 353 protruding towards the battery cell 10, and the sixth protrusion 352 and the seventh protrusion 353 are alternately connected. The sixth protrusion 352 extends along a second direction, and there are multiple sixth protrusions 352. The multiple sixth protrusions 352 are spaced apart along a third direction. The seventh protrusion 353 is connected between the ends of two adjacent sixth protrusions 352 on the same side along the second direction. The sixth protrusion 352 and the plate body 31 form a first sub-flow channel 341, and the seventh protrusion 353 and the plate body 31 form a second sub-flow channel 342. The sixth protrusion 352 and / or the seventh protrusion 353 at least partially abut against the battery cell 10 on the side facing the battery cell 10.

[0200] In this embodiment, another method of forming the first flow channel 34 is provided, namely, when the second liner 35 is connected to the side of the plate body 31 facing the battery cell 10, and the side of the second liner 35 facing the battery cell 10 is provided with alternating sixth protrusions 352 and seventh protrusions 353, flow channel grooves are formed on the side of the sixth protrusion 352 and seventh protrusions 353 away from the battery cell 10 along the first direction Z. The sixth protrusion 352 and seventh protrusion 353 protrude towards the battery cell 10, and naturally form recessed flow channel grooves on their back sides (the side away from the battery cell 10); the plate body 31 is sealed and connected to the side of the second liner 35 away from the battery cell 10, thereby forming a first sub-flow channel 341 and a second sub-flow channel 342 between the plate body 31 and the sixth protrusion 352 and the seventh protrusion 353. Since the sixth protrusion 352 and the seventh protrusion 353 are alternately connected, the first sub-flow channel 341 and the second sub-flow channel 342 are also alternately connected, together forming a serpentine flow channel.

[0201] It is understood that the main body 31 is sealed to the side of the second liner 35 away from the battery cell 10 to cover the flow channel groove to form a closed first flow channel 34. The area of ​​the second liner 35 does not need to be the same as the area of ​​the main body 31. That is, the area of ​​the second liner 35 only needs to be large enough to accommodate the sixth protrusion 352 and the seventh protrusion 353. This can reduce the amount of material used, lower the cost, and reduce the overall weight of the plate structure 30.

[0202] In one embodiment, alternating sixth protrusions 352 and seventh protrusions 353 can be formed on the second liner 35 by die stamping or molding. The cross-sections of the sixth protrusions 352 and seventh protrusions 353 can be rectangular, trapezoidal or corrugated.

[0203] According to some embodiments of this application, please refer to Figure 17 , Figure 18The sixth protrusion 352 at least partially abuts against the shoulder 12 of the battery cell 10 on the side facing the battery cell 10.

[0204] In this embodiment, the sixth protrusion 352 at least partially abuts against the shoulder 12 of the battery cell 10 on the side facing the battery cell 10, thereby avoiding the pressure relief structure 11 and the terminal post of the battery cell 10. At the same time, since the shoulder 12 of the battery cell 10 has strong positional rigidity, abutting the sixth protrusion 352 against the shoulder 12 can achieve cooling and heat dissipation of the battery cell 10 while reducing the deformation of the battery cell 10 caused by abutting against it.

[0205] During the charging and discharging process of the battery cell 10, the terminal area generates a lot of heat due to the current passing through it, making it one of the areas with the largest heat generation at the top of the battery cell 10. Since the shoulder 12 is close to the terminal, when the third protrusion 312 abuts against the shoulder 12, it can form a good thermally conductive connection between the plate structure 30 (especially the first flow channel 34 within the plate structure 30) and the high-heat area of ​​the terminal, thereby achieving better cooling of the terminal of the battery cell 10.

[0206] Please continue reading. Figure 17 , Figure 18 The sixth protrusion 352 has a first section facing the battery cell 10, and a second section located on both sides of the first section for connecting the first section and the plate body 31. The first section is generally planar and is used to form abutting contact with the battery cell 10. The second section is a transition connection part that connects the first section and the plate body 31 into one piece.

[0207] In one embodiment, the sixth protrusion 352 at least partially abuts against the shoulder 12 of the battery cell 10 on the side facing the battery cell 10, wherein the first section may abut against the shoulder 12 of the battery cell 10.

[0208] According to some embodiments of this application, please refer to Figure 17 , Figure 18 Along the third direction Y, two adjacent shoulders 12 correspond to a first sub-channel 341 in the first direction Z.

[0209] In this embodiment, along the third direction Y, two adjacent shoulders 12 correspond to a first sub-channel 341 in the first direction Z, thereby improving the cooling efficiency of the battery cell 10.

[0210] It is understandable that two adjacent shoulders 12 along the third direction Y (belonging to the shoulders 12 of two adjacent battery cells 10 respectively) correspond to a first sub-channel 341 in the height direction (first direction Z) of the battery cell 10. Since the shoulders 12 of two adjacent battery cells 10 are close in position, their corresponding first sub-channels 341 are also close and form the same group. The two first sub-channels 341 in the next group correspond to the two adjacent shoulders 12 of the next pair of adjacent battery cells 10, maintaining a large interval from the previous group.

[0211] Therefore, the arrangement of the first sub-channel 341 along the third direction Y follows the following pattern: Please see Figure 21 Two first sub-channels 341 are grouped together. The two first sub-channels 341 in the same group are relatively close to each other, and each group is set with a large distance between them along the third direction Y.

[0212] It is understandable that, since the first sub-channels 341 are arranged in groups at intervals (two in a group, with close distances within the same group and larger intervals between adjacent groups), the second sub-channel 342 is used to connect the two ends of two adjacent first sub-channels 341 on the same side along the second direction X, which will cause the lengths of the second sub-channels 342 located on both sides of the second direction X to differ.

[0213] Specifically, when the second sub-channel 342 is used to connect two first sub-channels 341 in the same group, the length of the second sub-channel 342 is shorter because the two first sub-channels 341 in the same group are close to each other (corresponding to the shoulder 12 position of two adjacent battery cells 10).

[0214] When the second sub-channel 342 is used to connect two first sub-channels 341 in different groups, the length of the second sub-channel 342 is relatively long because the first sub-channels 341 between different groups are spaced far apart.

[0215] In one embodiment, since the interval between two adjacent sets of first sub-channels 341 is large, the first air passage 33 can be set in the position region between two adjacent sets of first sub-channels 341.

[0216] Specifically, the first air passage 33 extends along the second direction X and is located in the gap area between two adjacent sets of first sub-flow passages 341. Thus, the first air passage 33 and the first flow passage 34 are staggered in the planar area of ​​the plate structure 30 and do not interfere with each other.

[0217] According to some embodiments of this application, please refer to Figure 17Along the third direction Y, the second liner 35 and the adjacent two shoulder portions 12 are provided with two sixth protrusions 352 in the corresponding areas. The two adjacent shoulder portions 12 abut against one of the sixth protrusions 352 respectively. The plate body 31 and the two sixth protrusions 352 respectively form a first sub-channel 341.

[0218] In this embodiment, the second liner 35 is provided with two sixth protrusions 352 protruding towards the battery cell 10 between two adjacent shoulders 12. The two sixth protrusions 352 respectively abut against the two adjacent shoulders 12, thereby forming two first sub-channels 341 with the plate body 31, which are used to cool and dissipate heat at the two adjacent shoulders 12 respectively.

[0219] Specifically, the plate body 31 and the second liner plate 35 are sealed together on the side away from the battery cell 10 without the third protrusion 312, thereby forming a first sub-channel 341 between the plate body 31 and the two sixth protrusions 352.

[0220] According to some embodiments of this application, please refer to Figure 18 Along the third direction Y, a sixth protrusion 352 is provided in the area corresponding to the second liner 35 and the two adjacent shoulders 12. The two adjacent shoulders 12 together abut against the sixth protrusion 352. Along the first direction Z, the part of the plate body 31 corresponding to the sixth protrusion 352 protrudes towards the battery cell 10 to form an eighth protrusion 315. The eighth protrusion 315 abuts against the side of the sixth protrusion 352 away from the battery cell 10, so as to form two first sub-channels 341 between the plate body 31 and the sixth protrusion 352.

[0221] With the above configuration, two first sub-channels 341 can also be formed between the main body 31 and the sixth protrusion 352, which are used to cool and dissipate heat at the two adjacent shoulder positions 12 respectively.

[0222] Specifically, the width of the sixth protrusion 352 is sufficient to cover the area of ​​the two adjacent shoulders 12, and at the same time forms a resisting fit with the two shoulders 12. The side of the sixth protrusion 352 away from the battery cell 10 forms a space with the plate body 31. The eighth protrusion 315 divides this space into two independent first sub-channels 341. These two first sub-channels 341 are used to cool and dissipate heat at the positions of the two adjacent shoulders 12, respectively.

[0223] According to some embodiments of this application, please refer to Figures 14-18 The battery device 100 also includes an insulating and heat-conducting component 70, which is sandwiched between the battery cell 10 and the plate structure 30.

[0224] In this embodiment, the battery device 100 further includes an insulating heat-conducting component 70, which is sandwiched between the battery cell 10 and the plate structure 30. The insulating heat-conducting component 70 can conduct the heat generated by the battery cell 10 to the plate structure 30 to achieve heat dissipation, and can also electrically isolate the battery cell 10 from the plate structure 30 to prevent short circuit risk caused by the plate structure 30 being charged or the battery cell 10 leaking current.

[0225] In one embodiment, the insulating heat-conducting element 70 can be sandwiched between the area corresponding to the plate structure 30 and the first flow channel 34 and the battery cell 10 to reduce the heat exchange path and improve the heat exchange efficiency.

[0226] According to some embodiments of this application, the insulating and thermally conductive element 70 includes an adhesive.

[0227] In this embodiment, the insulating and heat-conducting component 70 includes an adhesive component, which, in addition to achieving heat transfer and insulation, also serves to bond and fix the battery cell 10 and the plate structure 30. The battery cell 10 and the plate structure 30 are fixedly connected by the adhesive component to form an overall load-bearing structure, which improves the battery device 100's ability to resist deformation and vibration, and reduces the risk of displacement of the battery cell 10 due to vibration or impact. At the same time, it integrates the three functions of heat conduction, insulation and fixation.

[0228] According to some embodiments of this application, please refer to Figure 19 Along the second direction, at least one side of the cavity 23 is provided with a third beam 50 extending along the third direction. The third beam 50 is connected to the housing and abuts against the battery cell 10 on one side along the second direction. The battery device 100 also includes a second connector 80. Along the first direction Z, the second connector 80 passes through the plate body 31 and the second liner 35 and is fixedly connected to the third beam 50. The first direction Z can be the height direction of the battery cell 10, the second direction X can be the thickness direction of the battery cell 10, and the third direction Y can be the length direction of the battery cell 10.

[0229] In this embodiment, a third beam 50 extending along the third direction Y is provided on at least one side of the cavity 23 along the second direction X. The third beam 50 abuts against the side of the battery cell 10 located in the cavity 23 along the second direction X. That is, the third beam 50 and the battery cell 10 are in large-area contact, thereby achieving better constraint on the expansion deformation of the battery cell 10.

[0230] Meanwhile, the plate body 31 and the second liner 35 are fixedly connected to the third beam 50 through the second connector 80. Thus, the protruding structure on the plate structure 30 is used as a reinforcing rib. The three work together to achieve multiple constraints on the expansion deformation of the battery cell 10 along the second direction X, and jointly limit the expansion deformation of the battery cell 10.

[0231] In this embodiment, the protruding structure of the plate structure 30 itself is used as a reinforcing rib, and the plate body 31 and the second liner 35 are directly fixedly connected to the third beam 50 through the second connector 80. No additional anti-expansion components are required, reducing the connection structure. Compared with the traditional method that requires separate installation of composite material strips or anti-expansion steel strips, in this application, it is only necessary to simultaneously lock the second liner 35 and the plate body 31 to the third beam 50 through the second connector 80 while connecting the plate structure 30 to the frame structure 20, which simplifies the assembly process.

[0232] It is understandable that a third beam 50 can be provided on both sides of the cavity 23 along the second direction X. The two third beams 50 are fixedly connected to the second liner 35 and the plate body 31 respectively through the second connector 80, thereby forming a double-sided symmetrical constraint, further improving the effect of suppressing the expansion deformation of the battery cell 10, while balancing the force and enhancing the overall structural rigidity.

[0233] In this embodiment, the coordinated action of locking the plate body 31 and the first liner 32 to the third beam 50 through the first connector 60, and locking the plate body 31 and the second liner 35 to the third beam 50 through the second connector 80, can further improve the suppression effect on the expansion deformation of the battery cell 10 along the second direction X.

[0234] In one embodiment, the second connector 80 may be a screw, bolt, or rivet, which passes through the plate body 31 and the second liner 35 and is then locked into the threaded hole of the third beam 50.

[0235] In some embodiments of this application, the periphery of the plate structure 30 and the frame structure 20 can be connected and fixed by bolts. Specifically, bolt holes are provided at corresponding positions on the periphery of the plate structure 30 and the frame structure 20. After the bolt passes through the bolt hole on the plate structure 30, it is locked into the threaded hole on the frame structure 20 (or cooperates with the nut) to fasten the plate structure 30 to the frame structure 20.

[0236] According to some embodiments of this application, a battery device 100 is provided. The battery device 100 includes a frame structure 20, a plate structure 30, and a plurality of battery cells 10. The plate structure 30 is provided with a first air passage 33 and a first flow channel 34. The first air passage 33 is used to guide the high-temperature ejected material ejected by the battery cell 10 during thermal runaway to the second air passage 24 provided in the frame structure 20, thereby discharging the high-temperature ejected material to the outside along a predetermined path and reducing the probability of triggering a chain thermal runaway of adjacent battery cells 10.

[0237] Meanwhile, the first air passage 33 and the first flow passage 34 are both integrated into the plate structure 30. This achieves the function of exhaust and cooling without the need to separately set up an exhaust structure for exhaust and a cold plate structure 30 for cooling in the cavity 23. This significantly reduces the space occupied in the cavity 23, which helps to improve the energy density of the battery device 100, or reduce the overall size of the battery device 100 without changing the energy density of the battery device 100.

[0238] By setting up a first air passage 33, a second air passage 24, and a third air passage 51 that are connected in coordination, the emission path of the high-temperature ejected material ejected from the battery cell 10 during thermal runaway is extended, which helps to reduce the temperature of the high-temperature ejected material when it is finally discharged to the outside and reduces the thermal shock to the components around the battery device 100. At the same time, by integrating the first flow channel 34 into the plate structure 30, the high-temperature ejected material can be further cooled by the heat exchange fluid in the first flow channel 34 during its movement in the first air passage 33, thereby further reducing the temperature of the high-temperature ejected material when it is finally discharged to the outside.

[0239] By providing a third beam 50 within the cavity 23, and locking the plate body 31 and the first liner 32 to the third beam 50 via the first connector 60, and locking the plate body 31 and the second liner 35 to the third beam 50 via the second connector 80, better limiting and constraining of the expansion deformation of the battery cell 10 is achieved. At the same time, it eliminates the need for additional composite pressure strips or anti-expansion steel strips in the cavity 23 as required by traditional solutions, reducing the use of components and assembly complexity, and further reducing the space occupied within the cavity 23.

[0240] Secondly, this application proposes an electrical device, which includes a battery device 100 as described in the first aspect, the battery device 100 being used to provide electrical energy.

[0241] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 10, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles 1000, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0242] The examples of electrical devices in this application are based on the examples of the battery device 100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 100 described above, and will not be repeated here.

[0243] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, The battery device includes: Multiple battery cells; A frame structure having a cavity extending through a first direction, wherein a plurality of battery cells are housed within the cavity; A plate structure is connected to one side of the frame structure along the first direction and seals the cavity; the battery cell has a pressure relief structure on the side facing the plate structure. The plate structure is provided with a first air passage, and the first air passage has an opening on the side facing the battery cell that is opposite to the pressure relief structure. The frame structure is provided with a second air passage, which is connected to the first air passage, and is used to discharge the ejected material from the pressure relief structure to the outside.

2. The battery device as claimed in claim 1, characterized in that, The plate structure includes a plate body and a first liner plate, wherein the first liner plate is sealed to the side of the plate body facing the battery cell. The first liner has a first protrusion that protrudes toward the battery cell, and the first protrusion and the plate body form the first air passage, and the opening is provided on the first protrusion.

3. The battery device as claimed in claim 2, characterized in that, The first liner includes an insulating structural component; or, The first liner includes a metal structural component, and the surface of the first liner is coated with an insulating layer.

4. The battery device as claimed in claim 1, characterized in that, Along the first direction, the plate structure is disposed on top of the battery device.

5. The battery device as claimed in claim 1, characterized in that, The battery device also includes a seal that is sandwiched between the plate structure and the battery cell to form a sealed channel between the opening and the pressure relief structure.

6. The battery device as claimed in claim 5, characterized in that, The seal includes an adhesive component.

7. The battery device as claimed in claim 1, characterized in that, Multiple battery cells are arranged sequentially along a second direction to form a battery cell assembly, and multiple battery cell assemblies are arranged sequentially along a third direction to form a battery module. The first airway extends along the second direction, and there are multiple first airways. The multiple first airways are spaced apart along the third direction and are respectively connected to the second airway. The second direction and the third direction are both perpendicular to the first direction, and the second direction intersects the third direction.

8. The battery device according to any one of claims 1-7, characterized in that, The frame structure includes two first beams spaced apart along a second direction and two second beams spaced apart along a third direction, with the first beams and the second beams connected end to end in sequence; The second airway is located within the first beam and / or the second beam, and both the second direction and the third direction are perpendicular to the first direction, with the second direction intersecting the third direction.

9. The battery device as claimed in any one of claims 1 or 2, characterized in that, Along the second direction, at least one side of the cavity is provided with a third beam extending along the third direction, and the third beam abuts against the battery cell on one side along the second direction; The third beam body is provided with a third air passage, which connects the first air passage and the second air passage; The first direction, the second direction, and the third direction intersect each other but are not coplanar.

10. The battery device as claimed in claim 9, characterized in that, The battery device further includes a first connector that extends through the plate structure and is fixedly connected to the third beam along the first direction.

11. The battery device as claimed in claim 9, characterized in that, Along the first direction, at least a portion of the plate structure is in contact with the third beam; The plate structure is provided with a first pressure relief port that communicates with the first air passage at the contact portion with the third beam. The third beam is provided with a second pressure relief port that communicates with the third air passage at a position corresponding to the first pressure relief port. The first pressure relief port and the second pressure relief port are sealed and connected. Along the first direction, the plate structure is provided with an insertion part on the side facing the third beam. The insertion part is arranged around the first pressure relief port, and the insertion part is at least partially inserted into the third air passage through the second pressure relief port.

12. The battery device as claimed in claim 1, characterized in that, The plate structure has a first flow channel for supplying heat exchange fluid. The plate structure is at least partially thermally connected to the battery cell so that heat exchange can be carried out between the plate structure and the battery cell through the heat exchange fluid. In a plane perpendicular to the first direction, the first flow channel and the first air channel are offset from each other.

13. The battery device as claimed in claim 12, characterized in that, The first flow channel includes a plurality of alternating first sub-flow channels and a plurality of second sub-flow channels; The first sub-channel extends along the second direction, and a plurality of the first sub-channels are arranged at intervals along the third direction. The second sub-channel is connected between the ends of two adjacent first sub-channels on the same side along the second direction. Along the first direction, at least a portion of the plate structure faces the battery cell and abuts against the battery cell in the area corresponding to the first sub-channel and / or the second sub-channel; The first direction, the second direction, and the third direction intersect each other but are not coplanar.

14. The battery device as claimed in claim 13, characterized in that, The plate structure includes a plate body and a second liner plate, wherein the second liner plate is sealed to the side of the plate body opposite to the battery cell. The plate body has a plurality of third protrusions and a plurality of fourth protrusions protruding toward the battery cell on the side facing the battery cell, and the third protrusions and the fourth protrusions are alternately connected. The third protrusions extend along the second direction, and the plurality of third protrusions are spaced apart along the third direction. The fourth protrusions are connected between the ends of two adjacent third protrusions on the same side along the second direction. The third protrusion and the second liner form the first sub-channel, and the fourth protrusion and the second liner form the second sub-channel; The third protrusion and / or the fourth protrusion at least partially abut against the battery cell on the side facing the battery cell.

15. The battery device as claimed in claim 14, characterized in that, The third protrusion at least partially abuts against the shoulder of the battery cell on the side facing the battery cell.

16. The battery device as claimed in claim 15, characterized in that, Along the third direction, the two adjacent shoulders of two adjacent battery cells each correspond to a first sub-channel in the first direction.

17. The battery device as claimed in claim 16, characterized in that, Along the first direction, the plate body and the corresponding areas of the two adjacent shoulders are provided with two third protrusions, and the two adjacent shoulders abut against one of the third protrusions respectively; The second liner and each of the two third protrusions form a first sub-channel.

18. The battery device as claimed in claim 16, characterized in that, Along the first direction, the plate body and the area corresponding to the two adjacent shoulders are provided with a third protrusion, and the two adjacent shoulders jointly abut against the third protrusion; The second liner plate protrudes towards the battery cell in a portion corresponding to the third protrusion to form a fifth protrusion. The fifth protrusion abuts against the third protrusion on the side away from the battery cell, thereby forming two first sub-channels between the second liner plate and the third protrusion.

19. The battery device as claimed in claim 13, characterized in that, The plate structure includes a plate body and a second liner plate, the second liner plate being sealed to the side of the plate body facing the battery cell; The second liner has a sixth protrusion and a seventh protrusion protruding towards the battery cell on the side facing the battery cell, and the sixth protrusion and the seventh protrusion are alternately connected. The sixth protrusion extends along the second direction, and there are multiple sixth protrusions. The multiple sixth protrusions are arranged at intervals along the third direction. The seventh protrusion is connected between the ends of two adjacent sixth protrusions on the same side along the second direction. The sixth protrusion and the plate body form the first sub-channel, and the seventh protrusion and the plate body form the second sub-channel; The sixth protrusion and / or the seventh protrusion at least partially abut against the battery cell on the side facing the battery cell.

20. The battery device as claimed in claim 19, characterized in that, The sixth protrusion at least partially abuts against the shoulder of the battery cell on the side facing the battery cell.

21. The battery device as claimed in claim 20, characterized in that, Along the third direction, two adjacent shoulders each correspond to a first sub-channel in the first direction.

22. The battery device as claimed in claim 21, characterized in that, Along the third direction, the second liner and the area corresponding to the two adjacent shoulders are provided with two sixth protrusions, and the two adjacent shoulders abut against one of the sixth protrusions respectively; The plate body and the two sixth protrusions respectively form a first sub-channel.

23. The battery device as claimed in claim 21, characterized in that, Along the third direction, the second liner and the area corresponding to the two adjacent shoulders are provided with the sixth protrusion, and the two adjacent shoulders jointly abut against the sixth protrusion; Along the first direction, a portion of the plate body corresponding to the sixth protrusion protrudes toward the battery cell to form an eighth protrusion. The eighth protrusion abuts against the sixth protrusion on the side away from the battery cell, thereby forming two first sub-channels between the plate body and the sixth protrusion.

24. The battery device according to any one of claims 12-23, characterized in that, The battery device also includes an insulating and heat-conducting component, which is sandwiched between the battery cell and the plate structure.

25. The battery device as claimed in claim 24, characterized in that, The insulating and thermally conductive component includes an adhesive component.

26. The battery device according to any one of claims 14-23, characterized in that, Along the second direction, at least one side of the cavity is provided with a third beam extending along the third direction, and the third beam abuts against the battery cell on one side along the second direction; The battery device further includes a second connector, which passes through the plate body and the second liner along the first direction and is fixedly connected to the third beam.

27. An electrical appliance, characterized in that, The electrical device includes the battery device according to any one of claims 1-26.

Images