Battery device and electric device

Abstract

This application discloses a battery device and an electrical device. The battery device includes a battery cell assembly, a housing, and a heat exchanger. The battery cell assembly is installed inside the housing. The housing includes a frame, a first plate, and a second plate. The frame is annular, extending along the outer periphery of the first plate. The outer periphery of the first plate is connected to the frame. The first plate is located on one side of the battery cell assembly in a first direction, and the second plate is located on the side of the first plate opposite to the battery cell assembly. The heat exchanger is disposed between the first and second plates. According to the battery device of this application, the bottom of the housing is protected by the first plate, the second plate, and the heat exchanger, which can effectively improve the structural strength of the bottom of the housing and thus effectively ensure the safety and reliability of the housing.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, batteries, as the power source, play an irreplaceable and crucial role. Currently, the quality of the bottom structure strength of the enclosure directly affects its safety and reliability, and the bottom structure strength of enclosures in related technologies still needs improvement. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a battery device that can significantly improve the structural strength of the bottom of the housing, thereby effectively ensuring the safety and reliability of the housing.

[0004] In a first aspect, embodiments of this application provide a battery device, which includes: a battery cell assembly, a housing, and a heat exchanger. The battery cell assembly is installed in the housing. The housing includes a frame, a first plate, and a second plate. The frame is configured as an annular structure extending along the outer periphery of the first plate. The outer periphery of the plate structure is connected to the frame. The outer periphery of the second plate is connected to the frame. The first plate is located on one side of the battery cell assembly in a first direction. The second plate is located on the side of the first plate opposite to the battery cell assembly. The heat exchanger is disposed between the first plate and the second plate.

[0005] In the above example, the battery device housing includes a frame, a first plate, and a second plate. The frame is constructed as a ring extending along the outer periphery of the first plate. The outer periphery of the first plate is connected to the frame. A heat exchange component is installed between the first plate and the second plate. Thus, on the one hand, the bottom of the housing is jointly protected by the first plate and the second plate, which can effectively improve the structural strength of the bottom of the housing and thus effectively ensure the safety and reliability of the housing. On the other hand, the heat exchange component installed between the first plate and the second plate can further improve the structural strength of the plate structure formed by the first plate and the second plate, thereby enabling the battery device to have better safety and reliability.

[0006] In some embodiments of this application, the battery cell assembly is provided with an explosion-proof valve on one side in a first direction, the first plate is provided with a first opening, the first opening is disposed opposite to the explosion-proof valve, an exhaust space is formed between the second plate and the first plate, the heat exchanger is installed in the exhaust space, the first opening communicates with the exhaust space, and the battery cell assembly is located in a first region of the first plate.

[0007] In the above example, by constructing an exhaust space between the first plate and the second plate, the plate structure with good structural strength formed by the first plate and the second plate can be better utilized, making the exhaust space structure more stable and able to better guide the exhaust direction of high temperature and high pressure gas. By arranging the heat exchanger in the exhaust space, not only can the heat exchange of the battery cell assembly be satisfied, so that the battery cell assembly is at a suitable operating temperature, but also the gas can be cooled better after the explosion-proof valve is opened, and even the battery cell assembly can be cooled. This can reduce the damage to the outside of the battery cell assembly in the event of abnormal high pressure inside, and reduce the risk of fire and explosion of the battery cell assembly.

[0008] In some embodiments of this application, the first plate is further provided with a second opening, which communicates with the exhaust space, and the gas in the exhaust space is discharged through the second opening. The battery cell assembly is located in a first region of the first plate, and the second opening is located in a second region of the first plate.

[0009] In the above example, arranging both the first and second openings on the first plate can optimize the gas exhaust path, improve the exhaust efficiency of the battery cell assembly, reduce the sealing difficulty of the exhaust space, make the overall structure of the housing simpler, and allow for better inspection and cleaning of the first and second openings and the connected exhaust space, thereby ensuring that the exhaust system is always in a good unobstructed state and enabling the battery device to operate more reliably.

[0010] In some embodiments of this application, the heat exchanger includes a heat exchange tube that bends and extends to form an exhaust channel. The two sides of the heat exchange tube in a first direction are respectively sealed to the first plate and the second plate to close the exhaust channel. The first opening and the second opening are both connected to the exhaust channel. In the extension direction of the exhaust channel, the second opening is located at at least one end of the exhaust channel.

[0011] In the example above, the heat exchange tubes are bent to form an exhaust channel and are sealed to the first and second plates, which effectively guides the gas flow. On the one hand, high-temperature, high-pressure gas enters the exhaust channel in an orderly manner from the battery cell assembly through the first opening, flows along a specific path, and is finally discharged through the second opening, avoiding disorderly gas overflow and reducing the risk of damage to other structures. On the other hand, in the event of thermal runaway in some battery cells, limiting the exhaust direction can effectively isolate the gas, reduce the impact of the gas on surrounding battery cells, and ensure the overall safety and stable operation of the battery device.

[0012] In some embodiments of this application, the heat exchange tube includes a first heat exchange section and a second heat exchange section. The second heat exchange section is bent to form a U-shaped region. The first heat exchange section is bent and disposed within the U-shaped region and is bent and connected to the second heat exchange section. The exhaust channel is formed between the second heat exchange section and the first heat exchange section.

[0013] In the above example, by bending the first heat exchange section and placing it within the U-shaped area of ​​the second heat exchange section and connecting them tightly, the heat exchange effect of the heat exchanger can be improved, and the exhaust channel is less likely to be damaged, ensuring the reliability of the exhaust. In addition, the U-shaped area and the bending setting limit the direction of the exhaust channel, making the gas flow smoother and following a predetermined route, which can better flow from the first opening to the second opening, efficiently discharging high-temperature and high-pressure gas, thereby better ensuring the safe and reliable operation of the battery device.

[0014] In some embodiments of this application, the first heat exchange section includes a plurality of first heat exchange parts, which are arranged at intervals along a second direction. Each first heat exchange part extends along a third direction, and the first direction, the second direction, and the third direction are all perpendicular to each other.

[0015] In the above example, by setting multiple first heat exchange sections, the heat exchange area of ​​the first heat exchange section can be increased, which in turn can increase the heat exchange area of ​​the heat exchange tube, thereby improving the heat exchange effect of the heat exchange component.

[0016] In some embodiments of this application, the second heat exchange section includes: a second heat exchange portion, a third heat exchange portion, and a fourth heat exchange portion. The second heat exchange portion extends along a first side periphery of the first heat exchange section. The third heat exchange portion is connected between the second heat exchange portion and the first heat exchange section and extends along a second side periphery of the first heat exchange section. A first end of the third heat exchange portion is connected to the second heat exchange portion at an angle, and a second end of the third heat exchange portion is connected to the first heat exchange section at an angle. The fourth heat exchange portion communicates with the second heat exchange portion, is connected to the second heat exchange portion at an angle, and extends along a third side periphery of the first heat exchange section.

[0017] In the above technical solution, by arranging the second heat exchange section, the third heat exchange section and the fourth heat exchange section on three sides of the first heat exchange section, the second heat exchange section can surround the first heat exchange section, thereby increasing the compactness of the heat exchange tube arrangement, realizing the miniaturization of the heat exchange tube structure, which is conducive to improving the volumetric energy density of the battery device. At the same time, it can also simplify the structure of the heat exchange tube and facilitate the processing and production of the heat exchange tube.

[0018] In some embodiments of this application, the heat exchanger has one or more heat exchange tubes. When there are multiple heat exchange tubes, the multiple heat exchange tubes are arranged at intervals along a second direction, at least one of the heat exchange tubes surrounds the exhaust channel, and the multiple heat exchange tubes are arranged in parallel.

[0019] In the above technical solution, by setting the heat exchanger to have one or more heat exchange tubes, and arranging the multiple heat exchange tubes at intervals along the second direction, the diversity of heat exchange tubes can be increased, thereby improving the adaptability of the heat exchanger and enabling it to meet different heat exchange requirements. At the same time, the parallel arrangement of multiple heat exchange tubes allows multiple heat exchange tubes to exchange heat simultaneously, thereby reducing the heat exchange time of the heat exchanger and improving the heat exchange efficiency.

[0020] In some embodiments of this application, the heat exchange tube is a flat tube or a harmonica tube.

[0021] In the above technical solution, by setting the heat exchange tube as a flat tube or a harmonica tube, the heat transfer area of ​​the heat exchange component can be increased, thereby increasing the heat exchange effect of the heat exchange component; at the same time, the overall weight of the heat exchange component can be reduced, thereby increasing the energy density of the battery.

[0022] In some embodiments of this application, the heat exchanger is fixed to the side of the first plate facing the second plate.

[0023] In the above example, by fixing the heat exchanger to the side of the first plate facing the second plate, the heat exchanger can exchange heat with the battery cell assembly through the first plate, which can improve the reliability and efficiency of heat exchange.

[0024] In some embodiments of this application, the heat exchanger is welded to the first plate and the second plate on both sides in the first direction, respectively, and the second plate is welded to the first plate to form a plate structure, and the outer periphery of the plate structure is fixedly connected to the frame.

[0025] In the above examples, the welded plate structure exhibits strong stability and effectively resists vehicle vibrations and collision impacts. The welding connection method optimizes heat exchange, helping individual battery cells maintain optimal operating temperatures and extending their charge-discharge lifespan. Regarding the assembly process, the welding-then-fixing assembly flow improves production efficiency, reduces the risk of loosening later, and ensures long-term stable operation of the battery assembly.

[0026] In some embodiments of this application, the outer periphery of the first plate is welded to the frame, the heat exchanger is welded to the first plate, and the outer periphery of the second plate is detachably connected to the frame.

[0027] In the above example, the assembly method described above can simplify the assembly process, improve the heat exchange effect of the heat exchanger while ensuring the fixed strength of the heat exchanger, and facilitate the disassembly of the second plate for battery device maintenance, thereby reducing maintenance difficulty and improving maintenance efficiency.

[0028] In some embodiments of this application, the frame is provided with a plurality of first fixing holes, and the outer periphery of the second plate is provided with a plurality of second fixing holes opposite to the first fixing holes. A first fastener passes through the first fixing holes and the second fixing holes to fix the second plate to one side of the frame in the first direction.

[0029] In the example above, multiple corresponding first and second fixing holes, along with the first fastener, are used for fixation, making the installation process simple and convenient, and effectively improving assembly efficiency. Furthermore, the multiple fixing points allow for a tighter connection between the second plate and the frame, providing better resistance to external vibrations and impacts, ensuring the battery device operates safely and stably.

[0030] In some embodiments of this application, a buffer layer is provided between the second plate and the heat exchanger.

[0031] In the above example, by setting a buffer layer between the second plate and the heat exchanger, the forces between the second plate and the heat exchanger can be better dispersed and absorbed, preventing the heat exchanger and the second plate from being damaged due to rigid collision, ensuring the structural integrity of both and maintaining the stability of the heat exchange function.

[0032] In some embodiments of this application, the battery device further includes a seal disposed between the first plate and the second plate for sealing the vent space.

[0033] In the above example, sealing the exhaust space with a sealant effectively prevents the overflow of high-temperature, high-pressure gas entering the exhaust space from affecting other components of the battery device, thus improving the safety of the battery device. Furthermore, sealing the exhaust space ensures that the high-temperature, high-pressure gas entering the exhaust space can be effectively discharged through the second opening, guaranteeing smoother and more efficient exhaust, providing a more stable operating environment for the battery device, and extending its service life.

[0034] In some embodiments of this application, the seal is an annular ring extending along the outer periphery of the first plate or along the outer periphery of the second plate.

[0035] In the above example, the annular seal effectively surrounds the exhaust space, reducing the gap between the first and second plates. This prevents gas leakage and ensures smooth and stable exhaust, effectively protecting other components within the battery device from damage caused by high-temperature and high-pressure gases. Furthermore, the annular seal adapts to the outer periphery of either the first or second plate, requiring only edge fixing during installation. This simplifies installation, reducing time and difficulty and improving production efficiency. Moreover, the annular seal distributes stress evenly, maintaining a stable seal even under vibration and impact conditions, ensuring stable operation of the battery device.

[0036] In some embodiments of this application, the second plate has a recessed portion that is recessed in a direction away from the first plate, and the first plate covers the opening of the recessed portion to form an exhaust space with the second plate.

[0037] In the example above, only a recess needs to be constructed on the second plate, which not only facilitates the assembly of the first and second plates, but also ensures the flatness of the first plate, allowing the battery cell assembly to fit well with the first plate. This facilitates heat exchange between the heat exchange component and the battery cell assembly through the first plate, and the structure is simple, which can effectively reduce production costs.

[0038] In some embodiments of this application, the battery device further includes a first beam installed inside the housing to divide the housing into a first cavity and a second cavity. The battery cell assembly is arranged in the first cavity. A first opening is arranged in a region opposite to the first cavity to be opposite to the explosion-proof valve of the battery cell assembly. A second opening is arranged in a region opposite to the second cavity to communicate with an exhaust pipe arranged in the second cavity.

[0039] In the example above, by arranging the first beam inside the housing, the gas can be effectively directed to the second cavity, preventing gas accumulation in the first cavity containing the battery cells and significantly reducing the risk of battery cell explosion. Furthermore, the division by the first beam makes the internal structure of the housing more regular, facilitating the installation and maintenance of various components, improving production efficiency, and providing strong support for the long-term stable operation of the battery device.

[0040] In some embodiments of this application, the first beam is an expansion beam located on one side of the battery cell assembly in a third direction, and can expand or contract along the third direction.

[0041] In the example above, by setting the first beam as an expansion beam, installation space can be provided for the volume changes of the battery cell assembly due to thermal expansion and contraction.

[0042] In some embodiments of this application, the second region is provided with a current collector, which is in communication with the heat exchange channel in the heat exchange element, and the second opening is arranged between the current collector and the first beam.

[0043] In the above example, by arranging the second opening between the current collector and the first beam, the heat exchange medium in the current collector can also cool the gas discharged from the second opening, which can effectively reduce the temperature of the gas and further reduce the safety risks to the battery device after the gas is discharged.

[0044] In some embodiments of this application, a second beam is provided inside the box, and the second beam, the first plate and the second plate are all provided with opposing third fixing holes. A second fastener passes through the third fixing holes to detachably connect the second plate and the second beam.

[0045] In the example above, multiple corresponding third and fourth fixing holes are used in conjunction with the second fastener for fixing, making the installation process simple and convenient, and effectively improving assembly efficiency.

[0046] In some embodiments of this application, a protective layer is provided on the side of the second plate that is away from the first plate.

[0047] In the above example, by arranging a protective layer on the second plate, the impact of external forces can be buffered better, the deformation of the second plate can be better avoided, and the stability of the battery device can be improved.

[0048] In some embodiments of this application, the first plate is a steel plate or an aluminum plate.

[0049] In the above example, by making the first plate a steel plate or an aluminum plate, the structural strength of the first plate can be improved. Furthermore, when a heat exchanger is fixedly connected to the first plate, the first plate can improve the heat exchange effect between the heat exchanger and the battery cell assembly.

[0050] In some embodiments of this application, the second plate is a steel plate or an aluminum plate.

[0051] In the above example, by making the second plate a steel plate or an aluminum plate, the structural strength of the second plate can be improved.

[0052] Secondly, embodiments of this application provide an electrical device, including a battery device according to the first aspect of this application.

[0053] According to embodiments of this application, the electrical device may include a battery device for storing or providing electrical energy.

[0054] In the above examples, by incorporating the battery device described above, the power supply device of this application can have high reliability and good safety.

[0055] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0056] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0057] Figure 1 The electrical device provided in some embodiments of this application is a structural schematic diagram of a vehicle.

[0058] Figure 2 This is a schematic diagram of a battery device according to an embodiment of this application, with the top cover removed.

[0059] Figure 3 This is an exploded view of a housing according to one embodiment of this application.

[0060] Figure 4 This is an exploded view of the first plate, the second plate, and the heat exchanger in some embodiments of this application.

[0061] Figure 5 This is a schematic diagram of the frame, first plate, and second plate of one embodiment of this application.

[0062] Figure 6 This is a top view of the battery device with the top cover removed according to an embodiment of this application.

[0063] Figure 7 for Figure 6 A cross-sectional view along line AA.

[0064] Figure 8 for Figure 7 A magnified view of region B in the middle.

[0065] Figure 9 These are exploded views of the housing and heat exchange components of some embodiments of this application.

[0066] Figure 10 This is a schematic diagram of the structure of the heat exchanger, frame, and first plate in some embodiments of this application.

[0067] Figure 11 This is a partial cross-sectional view of the housing according to some embodiments of this application, wherein the heat exchanger is welded to the first plate and the second plate on both sides in the first direction to form a plate structure.

[0068] Figure 12This is a partial cross-sectional view of the housing in some embodiments of this application, wherein the outer periphery of the first plate is welded to the frame, the heat exchange component is welded to the first plate, and the outer periphery of the second plate is detachably connected to the frame.

[0069] Figure 13 This is an exploded view of the housing and battery cell assembly of some embodiments of this application.

[0070] Figure label:

[0071] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0072] 1. Battery cell assembly; 11. Battery cell; 12. Explosion-proof valve;

[0073] 2. Box body; 21. Frame; 22. First plate; 221. First opening; 222. Second opening; 23. Second plate; 231. Recess; 24. Exhaust space; 25. First cavity; 26. Second cavity;

[0074] 30. Exhaust passage; 31. Heat exchange tube; 311. First heat exchange section; 3111. First heat exchange part; 312. Second heat exchange section; 3121. Second heat exchange part; 3122. Third heat exchange part; 3123. Fourth heat exchange part;

[0075] 41. First fastener; 42. Second fastener;

[0076] 51. Buffer layer; 52. Seal; 53. Protective layer;

[0077] 61. First beam; 62. Second beam;

[0078] 7. Current collector;

[0079] Z, first direction; Y, second direction; X, third direction. Detailed Implementation

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0086] 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," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0087] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0088] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells, and when there are multiple battery cells, they are connected in series, parallel, or mixed connections via a busbar.

[0089] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0090] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0091] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0092] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0093] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0094] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0095] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0096] The technical solutions described in the embodiments of this application are applicable to various power devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0097] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, batteries, as the power source, play an irreplaceable and crucial role. Currently, the quality of the bottom structure strength of the enclosure directly affects its safety and reliability, and the bottom structure strength of enclosures in related technologies still needs improvement.

[0098] Based on the above considerations, in order to improve the bottom structural strength of the box, the applicant has conducted in-depth research and designed a battery device. The box of the battery device includes a frame, a first plate and a second plate. The frame is constructed as a ring extending along the outer periphery of the first plate. The outer periphery of the plate structure is connected to the frame, and the outer periphery of the second plate is connected to the frame. Thus, the bottom of the box is jointly protected by the first plate and the second plate, which can effectively improve the bottom structural strength of the box and thus effectively ensure the safety and reliability of the box.

[0099] This application provides an electrical device that uses the battery cell disclosed herein as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0100] For ease of explanation, the following embodiments take a vehicle 1000 as an example to describe in detail the structure of the electrical device, battery device 100 and battery cell 11 of this application.

[0101] Please refer to Figure 1 , Figure 1 This application provides a schematic diagram of the structure of an electrical device for a vehicle 1000, as shown in some embodiments. 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. The vehicle 1000 is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000; for example, it 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. 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, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0102] The battery device 100 of the first aspect of this application is described below with reference to the figures.

[0103] Please refer to Figure 2 , Figure 2 This is a schematic diagram of a battery device 100 according to an embodiment of this application, with the top cover removed.

[0104] Please refer to Figure 3 , Figure 3 This is an exploded view of the housing 2 according to one embodiment of this application.

[0105] Please refer to Figure 4 , Figure 4 This is an exploded view of the first plate, the second plate, and the heat exchanger in some embodiments of this application.

[0106] In some embodiments of this application, such as Figures 2-4 As shown, the battery device 100 includes a battery cell assembly 1, a housing 2, and a heat exchanger. The battery cell assembly 1 is installed inside the housing 2. The housing 2 includes a frame 21, a first plate 22, and a second plate 23. The frame 21 is constructed as an annular structure extending along the outer periphery of the first plate 22. The outer periphery of the first plate 22 is connected to the frame 21. The first plate 22 is located on one side of the battery cell assembly 1 in the first direction Z. The second plate 23 is located on the side of the first plate 22 away from the battery cell assembly 1. The heat exchanger is disposed between the first plate 22 and the second plate 23.

[0107] In other words, the second plate 23 is located outside the first plate 22. In the thickness direction of the first plate 22 and the second plate 23, the stacking of the first plate 22 and the second plate 23 can make the overall thickness of the plate structure formed by the first plate 22 and the second plate 23 thicker, thereby making the plate structure have better structural strength.

[0108] Furthermore, when the second plate 23 is subjected to force, it can transmit the force not only towards the first plate 22 but also towards the annular frame 21, thereby optimizing the direction of force transmission and decomposing the force. This makes the second plate 23 less prone to deformation. Additionally, even if the second plate 23 deforms under the action of force, the deformation directly consumes the force, making the first plate 22 less prone to deformation. The first plate 22 can also transmit the force towards the frame 21, making it less prone to deformation. This, in turn, provides better protection for the battery cell assembly 1 housed within the housing 2. Moreover, since the bottom of the housing 2 is supported by both the first plate 22 and the second plate 23, they not only provide good protection for the battery cell assembly 1 but also for the electrical components housed within the housing 2. This results in the battery device 100 equipped with the housing 2 having good safety and reliability.

[0109] Furthermore, it should be noted that the aforementioned first direction Z can be vertical, meaning that both the first plate 22 and the second plate 23 are located at the bottom of the frame 21. Alternatively, both the first plate 22 and the second plate 23 can be located at the top of the frame 21. Therefore, when the battery device 100 serves as the floor of the vehicle 1000, the cooperation of the first plate 22 and the second plate 23 can effectively protect the battery device 100 and prevent damage to it when the top cover deforms. Therefore, this application does not impose any limitations on this aspect.

[0110] The battery device 100 can install a heat exchanger between the first plate 22 and the second plate 23. On the one hand, the heat exchanger can exchange heat with the battery cell assembly 1 through the first plate 22, which can keep the battery cell assembly 1 in a suitable operating temperature range, thereby improving the charging and discharging efficiency and service life of the battery cell assembly 1. On the other hand, installing the heat exchanger between the first plate 22 and the second plate 23 can further improve the structural strength of the plate structure formed by the first plate 22 and the second plate 23, thereby giving the battery device 100 better safety and reliability.

[0111] In the above example, the housing 2 of the battery device 100 includes a frame 21, a first plate 22, and a second plate 23. The frame 21 is constructed as an annular structure extending along the outer periphery of the first plate 22. The outer periphery of the first plate 22 is connected to the frame 21. A heat exchange component is installed between the first plate 22 and the second plate 23. Thus, on the one hand, the bottom of the housing 2 is jointly protected by the first plate 22 and the second plate 23, which can effectively improve the structural strength of the bottom of the housing 2, thereby effectively ensuring the safety and reliability of the housing 2. On the other hand, the heat exchange component installed between the first plate 22 and the second plate 23 can further improve the structural strength of the plate structure formed by the first plate 22 and the second plate 23, thereby making the battery device 100 have better safety and reliability.

[0112] Please refer to Figures 5-8 , Figure 5 This is a schematic diagram of the structure of the frame 21, the first plate 22, and the second plate 23 according to an embodiment of this application. Figure 6 This is a top view of the top cover of a battery device 100 according to an embodiment of this application. Figure 7 for Figure 5 A cross-sectional view along line AA. Figure 8 for Figure 6 A magnified view of region B in the middle.

[0113] In some embodiments of this application, the battery cell assembly 1 is provided with an explosion-proof valve 12 on one side in the first direction Z, the first plate 22 is provided with a first opening 221, the first opening 221 is disposed opposite to the explosion-proof valve 12, an exhaust space 24 is constructed between the second plate 23 and the first plate 22, a heat exchanger is installed in the exhaust space 24, and the first opening 221 communicates with the exhaust space 24.

[0114] In other words, when the internal pressure of the battery cell assembly 1 rises suddenly due to an abnormal situation, the explosion-proof valve 12 can be opened quickly. After the explosion-proof valve 12 is opened, the high-temperature and high-pressure gas in the battery cell assembly 1 can be discharged to the exhaust space 24 through the first opening 221. For example, an exhaust pipe can be provided in the housing 2, and the high-temperature and high-pressure gas can be discharged to the outside of the housing 2 through the exhaust pipe.

[0115] Furthermore, the first opening 221 is located on the first plate 22. When abnormal high pressure occurs inside the battery cell assembly 1, causing the explosion-proof valve 12 to open, the high-temperature, high-pressure gas does not need to undergo complex detours and can directly flow into the exhaust space 24 through the first opening 221 on the first plate 22. This improves the exhaust efficiency of the battery cell assembly 1. Moreover, by arranging the exhaust space 24 between the first plate 22 and the second plate 23, the strong structural structure formed by the first plate 22 and the second plate 23 can be effectively utilized, making the exhaust space 24 structurally stable and better guiding the exhaust direction of the high-temperature, high-pressure gas. Additionally, even if the vehicle 1000 or other electrical equipment equipped with the battery device 100 is subjected to impact or other forces, causing damage or deformation to the second plate 23 or even the first plate 22, it will not easily affect the exhaust of the battery cell assembly 1, thereby effectively improving the reliability and safety of the vehicle 1000 and other electrical equipment.

[0116] For example, the first opening 221 is a square hole or a round hole.

[0117] On the other hand, when abnormal high pressure occurs inside the battery cell assembly 1, causing the explosion-proof valve 12 to open, the high-temperature and high-pressure gas can be cooled by the heat exchanger in the exhaust space 24, which can reduce the damage of the high-temperature and high-pressure gas to the external environment. For example, the heat exchanger can have a heat exchange tube 31. When the high-temperature and high-pressure gas damages or even ruptures the heat exchanger, the water in the heat exchange tube 31 can better cool down the battery cell assembly 1 through the first opening 221, which can better reduce the risk of fire and explosion of the battery cell assembly 1.

[0118] In the above example, by constructing an exhaust space 24 between the first plate 22 and the second plate 23, the plate structure with good structural strength formed by the first plate 22 and the second plate 23 can be better utilized, making the exhaust space 24 structure relatively stable and able to better guide the exhaust direction of high temperature and high pressure gas. By arranging the heat exchanger in the exhaust space 24, not only can the heat exchange of the battery cell assembly 1 be satisfied, so that the battery cell assembly 1 is at a suitable operating temperature, but also the gas can be cooled better after the explosion-proof valve 12 is opened, and even the battery cell assembly 1 can be cooled. This can reduce the damage to the outside of the battery cell assembly 1 in the case of abnormal high pressure inside, and reduce the risk of fire and explosion of the battery cell assembly 1.

[0119] In some embodiments of this application, the first plate 22 is further provided with a second opening 222, which is connected to the exhaust space 24. Gas in the exhaust space 24 is discharged through the second opening 222. The battery cell assembly 1 is located in the first region of the first plate 22, and the second opening 222 is located in the second region of the first plate 22.

[0120] In other words, the second opening 222 is also set on the first plate 22, which can reduce the connection sealing problems that may be caused by the first opening 221 and the second opening 222 being arranged on different structures. It can reduce the risk of gas leakage, make the overall structure simpler and more stable, and during maintenance and repair, the first opening 221, the second opening 222 and the connected exhaust space 24 can be inspected and cleaned better, thereby ensuring that the exhaust system is always in a good unobstructed state, and enabling the battery device 100 to operate more reliably.

[0121] For example, the second opening 222 is a square hole or a round hole.

[0122] In the above example, the arrangement of the first opening 221 and the second opening 222 on the first plate 22 can optimize the gas exhaust path, improve the exhaust efficiency of the battery cell assembly 1, and reduce the sealing difficulty of the exhaust space 24. This makes the overall structure of the housing 2 simpler and allows for better inspection and cleaning of the first opening 221, the second opening 222, and the connected exhaust space 24, thereby ensuring that the exhaust system is always in a good unobstructed state and enabling the battery device 100 to operate more reliably.

[0123] Please refer to Figure 4 , Figure 9 and Figure 10 ,in, Figure 9 This is an exploded view of the housing 2 and heat exchanger of some embodiments of this application. Figure 10 This is a schematic diagram of the structure of the heat exchanger, frame 21 and first plate 22 in some embodiments of this application.

[0124] In some embodiments of this application, the heat exchanger includes a heat exchange tube 31, which is bent and extended to form an exhaust channel 30. The two sides of the heat exchange tube 31 in the first direction Z are respectively sealed to the first plate 22 and the second plate 23 to close the exhaust channel 30. The first opening 221 and the second opening 222 are both connected to the exhaust channel 30. In the extension direction of the exhaust channel 30, the second opening 222 is located at at least one end of the exhaust channel 30.

[0125] In other words, by setting the exhaust channel 30, the exhaust direction of the high-temperature and high-pressure gas entering the exhaust space 24 from the first opening 221 can be guided. Specifically, when the high-temperature and high-pressure gas is discharged from the battery cell assembly 1, the gas can enter the exhaust channel 30 through the first opening 221, and then flow along the exhaust channel 30, and finally be discharged from the second opening 222. By restricting the exhaust direction of the gas, the risk of damage to other structures in the battery device 100 after gas overflow can be reduced. Specifically, after some battery cells 11 in the battery cell assembly 1 experience thermal runaway, by limiting the exhaust direction of the gas, the risk of damage to other battery cells 11 can also be reduced to a certain extent.

[0126] In the above example, the heat exchange tube 31 is bent to form an exhaust channel 30 and is sealed to the first plate 22 and the second plate 23, which can effectively guide the gas flow. On the one hand, high-temperature and high-pressure gas enters the exhaust channel 30 in an orderly manner from the battery cell assembly 1 through the first opening 221, flows along a specific path, and is finally discharged through the second opening 222, avoiding disorderly gas overflow and reducing the risk of damage to other structures. On the other hand, in the event of thermal runaway of some battery cells 11, limiting the exhaust direction can effectively isolate the gas, reduce the impact of the gas on surrounding battery cells 11, and ensure the overall safety and stable operation of the battery device 100.

[0127] In some embodiments of this application, such as Figure 10 As shown, the heat exchange tube 31 includes a first heat exchange section 311 and a second heat exchange section 312. The second heat exchange section 312 is bent to form a U-shaped area. The first heat exchange section 311 is bent and disposed in the U-shaped area and is bent and connected to the second heat exchange section 312. An exhaust channel 30 is formed between the second heat exchange section 312 and the first heat exchange section 311.

[0128] In other words, the first heat exchange section 311 is bent and placed within the U-shaped area of ​​the second heat exchange section 312, and is tightly connected by a bend, which can effectively increase the heat exchange area. During heat transfer, it can effectively absorb the heat of the battery cell assembly 1, allowing the high-temperature gas flowing through the exhaust channel 30 to cool down rapidly, optimizing the operating environment temperature of the battery cell assembly 1, and thus improving the performance and lifespan of the battery device 100. In addition, the first heat exchange section 311 is bent and placed within the U-shaped area of ​​the second heat exchange section 312, which can effectively maintain the integrity and sealing of the exhaust channel 30 even when the vehicle 1000 vibrates or there is slight displacement inside the battery, thereby ensuring the reliability of the exhaust from the exhaust channel 30. Furthermore, the U-shaped area and the bend limit the direction of the exhaust channel 30, making the gas flow smoother and following a predetermined route, and allowing it to flow more effectively from the first opening 221 to the second opening 222, efficiently discharging high-temperature and high-pressure gas, thereby better ensuring the safe and reliable operation of the battery device 100.

[0129] In the above example, by bending the first heat exchange section 311 and placing it within the U-shaped area of ​​the second heat exchange section 312 and connecting them tightly, the heat exchange effect of the heat exchanger can be improved, and the exhaust channel 30 is not easily damaged, ensuring the reliability of the exhaust. In addition, the U-shaped area and the bending setting limit the direction of the exhaust channel 30, making the gas flow smoother and following a predetermined route, so that it can flow from the first opening 221 to the second opening 222, efficiently discharging high-temperature and high-pressure gas, thereby better ensuring the safe and reliable operation of the battery device 100.

[0130] In some embodiments of this application, such as Figure 10 As shown, the first heat exchange section 311 includes a plurality of first heat exchange parts 3111, which are arranged at intervals along the second direction Y. Each first heat exchange part 3111 extends along the third direction X. The first direction Z, the second direction Y and the third direction X are all perpendicular to each other.

[0131] In other words, multiple first heat exchange sections 3111 are connected sequentially, and the connection point between two connected first heat exchange sections 3111 is bent. For example, two connected first heat exchange sections 3111 can be bent along a broken line or along an arc. The number of first heat exchange sections 3111 can be two, three, four, five or more.

[0132] It should be noted that the shape of the first heat exchange section 3111 can be varied, for example, it can be straight or curved. The extension direction of the first heat exchange section 3111 can also be varied, for example, it can extend along the length or thickness direction of the battery cell 11. In this way, multiple first heat exchange sections 3111 can be sequentially bent and connected, allowing the first heat exchange section 311 to form heat exchange tubes 31 in S-shape, Z-shape, V-shape, or other similar forms.

[0133] In the above example, by setting multiple first heat exchange sections 3111, the heat exchange area of ​​the first heat exchange section 311 can be increased, which in turn can increase the heat exchange area of ​​the heat exchange tube 31, thereby improving the heat exchange effect of the heat exchange component.

[0134] In some embodiments of this application, such as Figure 10 As shown, the second heat exchange section 312 includes: a second heat exchange part 3121, a third heat exchange part 3122, and a fourth heat exchange part 3123. The second heat exchange part 3121 extends along the first side periphery of the first heat exchange section 311. The third heat exchange part 3122 connects the second heat exchange part 3121 and the first heat exchange section 311 and extends along the second side periphery of the first heat exchange section 311. The first end of the third heat exchange part 3122 is connected to the second heat exchange part 3121 at an angle, and the second end of the third heat exchange part 3122 is connected to the first heat exchange section 311 at an angle. The fourth heat exchange part 3123 communicates with the second heat exchange part 3121, is connected to the second heat exchange part 3121 at an angle, and extends along the third side periphery of the first heat exchange section 311.

[0135] It is understandable that the fourth heat exchange section 3123 is connected to the end of the second heat exchange section 3121 away from the third heat exchange section 3122. The fourth heat exchange section 3123, the second heat exchange section 3121 and the third heat exchange section 3122 are connected in sequence to form a U-shaped region. The first heat exchange section 311 is arranged in the U-shaped region and is connected to the end of the third heat exchange section 3122 away from the second heat exchange section 3121.

[0136] It should be noted that this embodiment limits the arrangement of the second heat exchange section 312 on three sides of the first heat exchange section 311 in the circumferential direction, and does not limit the specific positions of the second heat exchange section 3121, the third heat exchange section 3122, and the fourth heat exchange section 3123 relative to the first heat exchange section 311. Therefore, the specific positions of the second heat exchange section 3121, the third heat exchange section 3122, and the fourth heat exchange section 3123 can be designed according to actual conditions. For example, if the second heat exchange section 3121 can be arranged on one side of the first heat exchange section 311 in the second direction Y, then the third heat exchange section 3122 and the fourth heat exchange section 3123 are respectively arranged on both sides of the first heat exchange section 311 in the third direction X; if the second heat exchange section 3121 is arranged on one side of the first heat exchange section 311 in the third direction X, then the third heat exchange section 3122 and the fourth heat exchange section 3123 are respectively arranged on both sides of the first heat exchange section 311 in the second direction Y.

[0137] In the above technical solution, by arranging the second heat exchange section 3121, the third heat exchange section 3122 and the fourth heat exchange section 3123 on three sides of the first heat exchange section 311 respectively, the second heat exchange section 312 can surround the first heat exchange section 311, thereby increasing the compactness of the heat exchange tube 31 arrangement, realizing the miniaturization of the heat exchange tube 31 structure, which is conducive to improving the volumetric energy density of the battery device 100. At the same time, it can also simplify the structure of the heat exchange tube 31 and facilitate the processing and production of the heat exchange tube 31.

[0138] In some embodiments of this application, such as Figure 10 As shown, the heat exchanger has one or more heat exchange tubes 31. When there are multiple heat exchange tubes 31, the multiple heat exchange tubes 31 are arranged at intervals along the second direction Y. At least one heat exchange tube 31 surrounds an exhaust channel 30. The multiple heat exchange tubes 31 are arranged in parallel.

[0139] It is understandable that the number of heat exchange tubes 31 in the heat exchanger can be one, two, three, four or more.

[0140] In some specific embodiments, multiple heat exchange tubes 31 are arranged at intervals along the first direction Z. For example, as shown in the figure, the heat exchange element may include two heat exchange tubes 31, and the two first heat exchange tubes 31 are arranged at intervals along the second direction Y.

[0141] Multiple heat exchange tubes 31 are arranged in parallel, that is, the inlets of multiple heat exchange tubes 31 are connected to the same liquid supply pipe, and the outlets of multiple heat exchange tubes 31 are connected to the same liquid outlet pipe.

[0142] In the above embodiments, by setting the heat exchanger to have one or more heat exchange tubes 31, and arranging the multiple heat exchange tubes 31 at intervals along the second direction Y, the diversity of heat exchange tubes 31 can be increased, thereby improving the adaptability of the heat exchanger and enabling it to meet different heat exchange requirements. At the same time, the parallel arrangement of multiple heat exchange tubes 31 allows multiple heat exchange tubes 31 to exchange heat simultaneously, thereby reducing the heat exchange time of the heat exchanger and improving the heat exchange efficiency.

[0143] According to some embodiments of this application, such as Figure 8 As shown, the heat exchange tube 31 can be a flat tube or a harmonica tube.

[0144] It is understood that in some embodiments, the heat exchange tube 31 is a flat tube, while in other embodiments, the heat exchange tube 31 is a harmonica tube. A flat tube refers to a tube whose cross-section along its extension direction is non-circular, such as having an elliptical or rectangular cross-section; a harmonica tube is a type of flat tube.

[0145] Specifically, the flat tube has flat upper and lower surfaces and a large contact area, which can increase the heat transfer area of ​​the heat exchanger and thus increase the heat exchange effect. At the same time, the flat tube is relatively light in weight while having the same bending and torsional strength. Therefore, using the flat tube as the heat exchange tube 31 can also reduce the overall weight of the heat exchanger and thus improve the energy density of the battery.

[0146] Furthermore, the flat tube can have a single heat exchange channel inside, or it can have multiple heat exchange channels formed by internal partitions. For example, both the flat tube and the harmonica tube can have partition ribs inside, which can extend along the length of the flat tube or harmonica tube and divide the heat exchange channel inside the flat tube or harmonica tube into multiple sub-channels.

[0147] In the above technical solution, by setting the heat exchange tube 31 as a flat tube or a harmonica tube, the heat transfer area of ​​the heat exchange component can be increased, thereby increasing the heat exchange effect of the heat exchange component; at the same time, the overall weight of the heat exchange component can be reduced, thereby increasing the energy density of the battery.

[0148] Please refer to Figure 11 and Figure 12 ,in, Figure 11 This is a partial cross-sectional view of the housing 2 in some embodiments of this application, wherein the two sides of the heat exchanger in the first direction Z are welded to the first plate 22 and the second plate 23 respectively to form a plate structure. Figure 12 This is a partial cross-sectional view of the housing 2 in some embodiments of this application, wherein the outer periphery of the first plate 22 is welded to the frame 21, the heat exchange component is welded to the first plate 22, and the outer periphery of the second plate 23 is detachably connected to the frame 21.

[0149] According to some embodiments of this application, such as Figure 11 As shown, the heat exchanger is fixed to the side of the first plate 22 facing the second plate 23.

[0150] In other words, the heat exchanger can be directly fixed on the first plate 22, which can effectively shorten the distance between the heat exchanger and the battery cell assembly 1, thereby shortening the heat conduction path between the heat exchanger and the battery cell assembly 1 and increasing the heat transfer efficiency. As a result, the heat exchanger can exchange heat with the battery cell assembly 1 through the first plate 22, which can improve the reliability and efficiency of heat exchange.

[0151] For example, the heat exchanger can be fixed by bonding or welding, and this application does not limit the method.

[0152] For example, during the assembly of the heat exchanger, the heat exchanger can be fixed to the first plate 22 in advance, then the first plate 22 can be fixed to the bottom of the frame 21, and finally the second plate 23 can be assembled.

[0153] In the above example, by fixing the heat exchanger to the side of the first plate 22 facing the second plate 23, the heat exchanger can exchange heat with the battery cell assembly 1 through the first plate 22, which can improve the reliability and efficiency of heat exchange.

[0154] According to some embodiments of this application, such as Figure 11 As shown, the heat exchanger is welded to the first plate 22 and the second plate 23 on both sides of the first direction Z, respectively, and the second plate 23 is welded to the first plate 22 to form a plate structure. The outer periphery of the plate structure is fixedly connected to the frame 21.

[0155] In other words, the heat exchanger is welded to the first plate 22 and the second plate 23 on both sides to form a plate structure. The welding process improves the stability of the connection and greatly enhances the overall structural rigidity of the plate structure. It effectively resists deformation risks when facing vehicle vibrations and collision impacts, providing good protection. Furthermore, the welding connection improves heat conduction performance, which is beneficial for improving the heat exchange effect of the heat exchanger, thus maintaining the battery cell assembly 1 at an optimal operating temperature, thereby improving the charging and discharging efficiency and service life of the battery cell assembly 1. In addition, in terms of assembly process, the heat exchanger can be welded to the first plate 22 and the second plate 23 on both sides to form a plate structure first, and then the outer periphery of the plate structure can be fixedly connected to the frame 21. This simplifies the assembly process and improves production efficiency. At the same time, the stable connection reduces the risk of loosening later, ensuring the long-term stable operation of the battery device 100.

[0156] For example, the outer periphery of the second plate 23 is welded to the outer periphery of the first plate 22.

[0157] For example, in a projection plane perpendicular to the first direction X, the area of ​​the second plate 23 is smaller than the area of ​​the first plate 22, and the outer periphery of the second plate 23 is welded to the side of the first plate 22.

[0158] For example, the outer periphery of the second plate 23 may be constructed with a welded flange.

[0159] In the above example, the welded plate structure is highly stable and can effectively resist the vibration and impact of vehicle 1000 during driving. The welding connection method can optimize heat exchange, which is conducive to maintaining the optimal operating temperature of the battery cell assembly 1 and extending its charge and discharge life. In terms of the assembly process, the assembly process of welding first and then fixing can improve production efficiency, reduce the risk of loosening later, and ensure the long-term stable operation of the battery device 100.

[0160] In some embodiments of this application, such as Figure 12 As shown, the outer periphery of the first plate 22 is welded to the frame 21, the heat exchange component is welded to the first plate 22, and the outer periphery of the second plate 23 is detachably connected to the frame 21.

[0161] In other words, welding the first plate 22 to the frame 21 improves the connection strength between the first plate 22 and the frame 21. Welding the heat exchange component to the first plate 22 improves the connection strength between the heat exchange component and the first plate 22. Furthermore, it allows the heat exchange component to stably exchange heat with the battery cell assembly 1, thereby better maintaining the battery cell assembly 1 at an optimal operating temperature and extending its charge-discharge life. The detachable connection between the outer periphery of the second plate 23 and the frame 21 allows for easier inspection and maintenance of the battery device 100 by disassembling the second plate 23, reducing maintenance difficulty.

[0162] In the above example, the assembly method described above can simplify the assembly process, improve the heat exchange effect of the heat exchanger while ensuring the fixed strength of the heat exchanger, and facilitate the disassembly of the second plate 23 for the maintenance of the battery device 100, thereby reducing maintenance difficulty and improving maintenance efficiency.

[0163] In some embodiments of this application, such as Figure 12 As shown, the frame 21 is provided with a plurality of first fixing holes, and the outer periphery of the second plate 23 is provided with a plurality of second fixing holes opposite to the first fixing holes. The first fastener 41 passes through the first fixing holes and the second fixing holes to fix the second plate 23 to one side of the frame 21 in the first direction Z.

[0164] For example, the first fastener 41 may be a screw, rivet, etc., and this application does not limit it.

[0165] In the above example, multiple corresponding first and second fixing holes, along with the first fastener 41, are used for fixing, making the installation process simple and convenient, and effectively improving assembly efficiency. In addition, the multiple fixing points allow the second plate 23 to be connected more tightly to the frame 21, which can better resist external vibration and impact, enabling the battery device 100 to work more safely and stably.

[0166] In some embodiments of this application, such as Figure 3 , Figure 9 and Figure 12 As shown, a buffer layer 51 is provided between the second plate 23 and the heat exchanger.

[0167] In other words, a buffer layer 51 is provided between the second plate 23 and the heat exchanger, for example, the buffer layer 51 is made of silicone. Silicone has good flexibility and resilience. In terms of cushioning and shock absorption, when the vehicle encounters bumps or collisions while traveling at 1000 km / h, the silicone buffer layer 51 can effectively absorb and disperse the impact force, prevent the heat exchanger and the second plate 23 from being damaged due to rigid collision, ensure the structural integrity of both and maintain the stability of the heat exchange function.

[0168] In other examples, the buffer layer 51 can also be a double-sided adhesive with a certain compressibility, which can not only improve the connection strength between the second plate 23 and the heat exchanger, but also ensure that the second plate 23 and the heat exchanger have a good buffering effect.

[0169] In the above example, by setting a buffer layer 51 between the second plate 23 and the heat exchanger, the forces between the second plate 23 and the heat exchanger can be better dispersed and absorbed, preventing the heat exchanger and the second plate 23 from being damaged due to rigid collision, ensuring the structural integrity of both and maintaining the stability of the heat exchange function.

[0170] In some embodiments of this application, such as Figure 3 , Figure 9 and Figure 12 As shown, the battery device 100 also includes a seal 52, which is disposed between the first plate 22 and the second plate 23 to seal the exhaust space 24.

[0171] For example, the seal 52 can be made of rubber, plastic, or other materials, and this application does not impose any restrictions.

[0172] In the above example, sealing the exhaust space 24 with the sealant 52 effectively prevents the overflow of high-temperature, high-pressure gas entering the exhaust space 24 from affecting other components of the battery device 100, thereby improving the safety of the battery device 100. Furthermore, sealing the exhaust space 24 ensures that the high-temperature, high-pressure gas entering the exhaust space 24 can be effectively discharged from the second opening 222, guaranteeing smooth and efficient exhaust, providing a more stable working environment for the battery device 100, and extending its service life.

[0173] In some embodiments of this application, such as Figure 3 , Figure 9 As shown, the seal 52 is an annular ring extending along the outer periphery of the first plate 22 or along the outer periphery of the second plate 23.

[0174] In the above example, the annular seal 52 can effectively surround the exhaust space 24, reducing the gap between the first plate 22 and the second plate 23, thus effectively preventing gas leakage and ensuring smooth and stable exhaust. This effectively protects other components within the battery device 100 from damage caused by high-temperature and high-pressure gases. Furthermore, the annular seal 52 fits the outer periphery of either the first plate 22 or the second plate 23, requiring only edge fixing during installation. This simple and quick operation reduces installation time and difficulty, improving production efficiency. Moreover, the annular seal 52 distributes force evenly, maintaining a stable fit even under vibration and impact conditions, ensuring a long-term sealed state and guaranteeing stable operation of the battery device 100.

[0175] In some embodiments of this application, such as Figure 3 , Figure 4 and Figure 9 As shown, the second plate 23 has a recess 231 that is recessed in a direction away from the first plate 22, and the first plate 22 covers the opening of the recess 231 to form an exhaust space 24 with the second plate 23.

[0176] For example, the second plate 23 can be stamped to form a recess 231. After stamping, a flange surrounding the outer periphery of the recess 231 can also be formed on the second plate 23. The flange can fit well with the first plate 22, thereby allowing the first plate 22 and the second plate 23 to be fixedly connected. It also helps to seal the flange and the first plate 22, thus effectively ensuring the sealing effect of the exhaust space 24. Furthermore, by only forming the recess 231 on the second plate 23, the flatness of the first plate 22 can be well ensured, allowing the battery cell assembly 1 to fit well with the first plate 22. This facilitates heat exchange between the heat exchange component and the battery cell assembly 1 through the first plate 22, and the structure is simple, which can significantly reduce production costs.

[0177] In the above example, only a recess 231 needs to be constructed on the second plate 23, which not only facilitates the assembly of the first plate 22 and the second plate 23, but also ensures the flatness of the first plate 22, allowing the battery cell assembly 1 to fit well with the first plate 22. This facilitates heat exchange between the heat exchange component and the battery cell assembly 1 through the first plate 22, and the structure is simple, which can effectively reduce production costs.

[0178] Please refer to Figure 2 and Figure 13 , Figure 13 This is an exploded view of the housing 2 and the battery cell assembly 1 according to some embodiments of this application.

[0179] In some embodiments of this application, such as Figure 2 and Figure 13 As shown, the battery device 100 also includes a first beam 61, which is installed inside the housing 2 to divide the housing 2 into a first cavity 25 and a second cavity 26. The battery cell assembly 1 is arranged in the first cavity 25. A first opening 221 is arranged in the area opposite to the first cavity 25 so as to be opposite to the explosion-proof valve 12 of the battery cell assembly 1. A second opening 222 is arranged in the area opposite to the second cavity 26.

[0180] In other words, the first beam 61 divides the housing 2 into two parts, physically separating the first cavity 25 and the second cavity 26. The battery cell assembly 1 is placed in the first cavity 25. When the battery cell assembly 1 malfunctions, such as when thermal runaway causes the explosion-proof valve 12 to open, the first opening 221 can effectively guide the high-temperature and high-pressure gas through the exhaust space 24 or exhaust channel 30 and the second opening 222 to the second cavity 26, effectively preventing the gas from accumulating in the first cavity 25 containing the battery cell assembly 1, and can effectively reduce the risk of the battery cell assembly 1 exploding.

[0181] Secondly, the second opening 222 is connected to the exhaust pipe inside the second cavity 26, allowing for smooth and efficient gas flow, which can effectively discharge gas from the exhaust space 24 or the exhaust channel 30. Furthermore, from an overall layout perspective, this separation makes the internal structure more regular, facilitating the installation and maintenance of various components, improving production efficiency, and providing a strong guarantee for the long-term stable operation of the battery device 100.

[0182] In the above example, by arranging the first beam 61 inside the housing 2, the gas can be effectively discharged to the second cavity, preventing gas from accumulating in the first cavity 25 containing the battery cell assembly 1, and thus significantly reducing the risk of the battery cell assembly 1 exploding. Furthermore, the separation provided by the first beam 61 makes the internal structure of the housing 2 more regular, facilitating the installation and maintenance of various components, improving production efficiency, and providing strong support for the long-term stable operation of the battery device 100.

[0183] In some embodiments of this application, such as Figure 2 and Figure 13 As shown, the first beam 61 is an expansion beam, which is located on one side of the third direction X of the battery cell assembly 1, and can expand or contract along the third direction X.

[0184] In other words, the temperature of the battery cell assembly 1 is affected by the operating status and the external temperature. When the temperature of the battery cell assembly 1 decreases, it contracts, and its volume decreases. The first beam 61 is an expansion beam, which can expand accordingly along the third direction X to fix the battery cell assembly 1 into the first receiving cavity. When the temperature of the battery cell assembly 1 increases, it expands, and its volume increases. The first beam 61 is an expansion beam, which can contract accordingly along the third direction X to provide expansion space for the expansion of the battery cell assembly 1.

[0185] Among them, for example Figure 13 As shown, the battery cell assembly 1 includes a plurality of battery cells 11 arranged along a third direction X, where the third direction X is the thickness direction of the battery cell 11.

[0186] In the above example, by setting the first beam 61 as an expansion beam, installation space can be provided for the volume change of the battery cell assembly 1 during thermal expansion and contraction.

[0187] In some embodiments of this application, such as Figure 5 and Figure 6 As shown, a collector 7 is arranged in the second region. The collector 7 is connected to the heat exchange channel in the heat exchange component. The second opening 222 is arranged between the collector 7 and the first beam 61.

[0188] In other words, the high-temperature and high-pressure gas is discharged from the second opening 222 within the heat exchanger arrangement area. Furthermore, due to its proximity to the current collector 7, the heat exchange medium in the current collector 7 can also cool the gas discharged from the second opening 222, thereby effectively reducing the gas temperature and further reducing the safety risks to the battery device 100 after the gas is discharged.

[0189] For example, the current collector 7 can be an elongated strip extending along the second direction. When there are two or more heat exchange tubes 31 arranged, and each heat exchange tube 31 can form an exhaust channel 30, the two or more exhaust channels 30 can each have a second opening 222. The two or more second openings 222 can be arranged at intervals along the second direction Y, which can facilitate the arrangement of the two or more second openings 222.

[0190] In the above example, by arranging the second opening 222 between the current collector 7 and the first beam 61, the heat exchange medium in the current collector 7 can also cool down the gas discharged from the second opening 222, which can better reduce the temperature of the gas, thereby further reducing the safety risks to the battery device 100 after the gas is discharged.

[0191] In some embodiments of this application, such as Figure 11 As shown, a second beam 62 is provided inside the box body 2. The second beam 62, the first plate 22 and the second plate 23 are all provided with corresponding third fixing holes. The second fastener 42 passes through the third fixing holes to detachably connect the second plate 23 and the second beam 62.

[0192] For example, the second fastener 42 may be a screw, rivet, etc., and this application does not limit it.

[0193] In the above example, multiple corresponding third and fourth fixing holes are used in conjunction with the second fastener 42 for fixing, making the installation process simple and convenient, and effectively improving assembly efficiency.

[0194] In some embodiments of this application, such as Figure 11 As shown, a protective layer 53 is provided on the side of the second plate 23 that is away from the first plate 22.

[0195] For example, the protective layer 53 can be made of fire-retardant ceramic fiber. When the battery experiences thermal runaway and causes high temperature or even open flame, it can effectively block the spread of flames, prevent the fire from affecting surrounding components, and buy more time for the battery device 100 to handle the situation safely.

[0196] For example, the protective layer 53 can be made of impact-resistant high-strength nylon. When the vehicle 1000 is subjected to collision or vibration impact, the nylon protective layer 53 can absorb and disperse the impact force, protect the second plate 23 and internal components from damage, and improve the reliability of the battery device 100.

[0197] It is understood that the aforementioned protective layer 53 may also be made of other materials, or may be a coating applied to the second plate 23, and this application does not impose any restrictions on this.

[0198] In the above example, by arranging a protective layer 53 on the second plate 23, the impact of external forces can be buffered better, the deformation of the second plate 23 can be better avoided, and the stability of the battery device 100 can be improved.

[0199] In some embodiments of this application, the first plate 22 is a steel plate or an aluminum plate.

[0200] In the above example, by making the first plate 22 a steel plate or an aluminum plate, the structural strength of the first plate 22 can be improved. Furthermore, when a heat exchanger is fixedly connected to the first plate 22, the first plate 22 can improve the heat exchange effect between the heat exchanger and the battery cell assembly 1.

[0201] In some embodiments of this application, the second plate 23 is a steel plate or an aluminum plate.

[0202] In the above example, by making the second plate 23 a steel plate or an aluminum plate, the structural strength of the second plate 23 can be improved.

[0203] This application also proposes an electrical device.

[0204] According to the embodiments of this application, the power-consuming device may include a battery device 100, which is used to store or provide electrical energy.

[0205] In the above example, by providing the battery device 100 as described above, the power supply device of this application can have high reliability and good safety.

[0206] Other configurations and operations of the battery device 100 and the power-consuming device according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0207] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0208] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device (100), characterized by include: Battery cell assembly (1); The housing (2) is in which the battery cell assembly (1) is installed. The housing (2) includes a frame (21), a first plate (22) and a second plate (23). The frame (21) is constructed as an annular shape extending along the outer periphery of the first plate (22). The outer periphery of the first plate (22) is connected to the frame (21). The first plate (22) is located on one side of the battery cell assembly (1) in a first direction (Z). The second plate (23) is located on the side of the first plate (22) away from the battery cell assembly (1). A heat exchanger is disposed between the first plate (22) and the second plate (23).

2. The battery device (100) according to claim 1, characterized in that The battery cell assembly (1) has an explosion-proof valve (12) on one side in the first direction (Z). The first plate (22) has a first opening (221) which is opposite to the explosion-proof valve (12). An exhaust space (24) is formed between the second plate (23) and the first plate (22). The heat exchanger is installed in the exhaust space (24). The first opening (221) communicates with the exhaust space (24).

3. The battery device (100) according to claim 2, characterized in that The first plate (22) is also provided with a second opening (222), which communicates with the exhaust space (24). Gas in the exhaust space (24) is discharged through the second opening (222). The battery cell assembly (1) is located in the first region of the first plate (22), and the second opening (222) is located in the second region of the first plate (22).

4. The battery device (100) according to claim 3, characterized in that The heat exchanger includes a heat exchange tube (31), which is bent and extends to form an exhaust channel (30). The two sides of the heat exchange tube (31) in the first direction (Z) are respectively sealed to the first plate (22) and the second plate (23) to close the exhaust channel (30). The first opening (221) and the second opening (222) are both connected to the exhaust channel (30). In the extension direction of the exhaust channel (30), the second opening (222) is located at at least one end of the exhaust channel (30).

5. The battery device (100) according to claim 4, characterized in that The heat exchange tube (31) includes a first heat exchange section (311) and a second heat exchange section (312). The second heat exchange section (312) is bent to form a U-shaped area. The first heat exchange section (311) is bent and disposed in the U-shaped area and is bent and connected to the second heat exchange section (312). The exhaust channel (30) is formed between the second heat exchange section (312) and the first heat exchange section (311).

6. The battery device (100) according to claim 5, characterized in that The first heat exchange section (311) includes a plurality of first heat exchange parts (3111), which are arranged at intervals along the second direction (Y). Each first heat exchange part (3111) extends along the third direction (X), and the first direction (Z), the second direction (Y), and the third direction (X) are all perpendicular to each other.

7. The battery device (100) according to claim 5, characterized in that The second heat exchange section (312) includes: a second heat exchange part (3121), a third heat exchange part (3122), and a fourth heat exchange part (3123). The second heat exchange part (3121) extends along the first side periphery of the first heat exchange section (311). The third heat exchange part (3122) is connected between the second heat exchange part (3121) and the first heat exchange section (311) and extends along the second side periphery of the first heat exchange section (311). The first end of the third heat exchange part (3122) is connected to the second heat exchange part (3121) at an angle, and the second end of the third heat exchange part (3122) is connected to the first heat exchange section (311) at an angle. The fourth heat exchange part (3123) communicates with the second heat exchange part (3121), is connected to the second heat exchange part (3121) at an angle, and extends along the third side periphery of the first heat exchange section (311).

8. The battery device (100) according to any one of claims 4-7, characterized in that, The heat exchanger has one or more heat exchange tubes (31). When there are multiple heat exchange tubes (31), the multiple heat exchange tubes (31) are arranged at intervals along the second direction (Y). At least one of the heat exchange tubes (31) surrounds the exhaust channel (30). The multiple heat exchange tubes (31) are arranged in parallel.

9. The battery device (100) according to any one of claims 4-8, characterized in that, The heat exchange tube (31) is a flat tube or a harmonica tube.

10. The battery device (100) according to any one of claims 1-9, characterized in that, The heat exchanger is fixed to the side of the first plate (22) facing the second plate (23).

11. The battery device (100) according to any one of claims 1-9, characterized in that, The heat exchanger is welded to the first plate (22) and the second plate (23) on both sides of the first direction (Z), respectively, and the second plate (23) is welded to the first plate (22) to form a plate structure. The outer periphery of the plate structure is fixedly connected to the frame (21).

12. The battery device (100) according to any one of claims 1-9, characterized by The outer periphery of the first plate (22) is welded to the frame (21), the heat exchange component is welded to the first plate (22), and the outer periphery of the second plate (23) is detachably connected to the frame (21).

13. The battery device (100) according to claim 12, characterized in that, The frame (21) is provided with a plurality of first fixing holes, and the outer periphery of the second plate (23) is provided with a plurality of second fixing holes opposite to the first fixing holes. The first fastener (41) passes through the first fixing holes and the second fixing holes to fix the second plate (23) on one side of the frame (21) in the first direction (Z).

14. The battery device (100) according to any one of claims 1-13, characterized by A buffer layer (51) is provided between the second plate (23) and the heat exchanger.

15. The battery device (100) according to claim 2, characterized in that It also includes a seal (52) disposed between the first plate (22) and the second plate (23) for sealing the exhaust space (24).

16. The battery device (100) according to claim 15, characterized in that The sealing element (52) is an annular ring extending along the outer periphery of the first plate (22) or along the outer periphery of the second plate (23).

17. The battery device (100) according to claim 2, characterized in that The second plate (23) has a recess (231) recessed in a direction away from the first plate (22), and the first plate (22) covers the opening of the recess (231) to form an exhaust space (24) with the second plate (23).

18. The battery device (100) according to claim 3, characterized in that It also includes a first beam (61) installed inside the housing (2) to divide the housing (2) into a first cavity (25) and a second cavity (26). The battery cell assembly (1) is arranged in the first cavity (25). The first opening (221) is arranged in the area opposite to the first cavity (25) to be opposite to the explosion-proof valve (12) of the battery cell assembly (1). The second opening (222) is arranged in the area opposite to the second cavity (26).

19. The battery device (100) according to claim 18, characterized in that The first beam (61) is an expansion beam located on one side of the third direction (X) of the battery cell assembly (1), and can expand or contract along the third direction (X).

20. The battery device (100) according to claim 18, characterized in that The second region is provided with a collector (7), which is connected to the heat exchange channel in the heat exchange component, and the second opening (222) is arranged between the collector (7) and the first beam (61).

21. The battery device (100) according to any one of claims 1-20, characterized in that, The box (2) is provided with a second beam (62). The second beam (62), the first plate (22) and the second plate (23) are all provided with corresponding third fixing holes. The second fastener (42) passes through the third fixing holes to detachably connect the second plate (23) and the second beam (62).

22. The battery device (100) according to any one of claims 1-21, characterized by The second plate (23) has a protective layer (53) on the side opposite to the first plate (22).

23. The battery device (100) according to any one of claims 1-22, characterized by The first plate (22) is a steel plate or an aluminum plate, and / or the second plate (23) is a steel plate or an aluminum plate.

24. An electrical device, comprising: The battery device (100) includes any one of claims 1-23, the battery device (100) being used to store or provide electrical energy.

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