Battery device and electric device

Abstract

The application provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a box body, at least one battery monomer group, a limiting beam and a first blocking piece. The box body has a containing cavity; the at least one battery monomer group is contained in the containing cavity, each battery monomer group comprises a plurality of battery monomers arranged along a first direction, the at least one battery monomer group comprises a first battery monomer group arranged adjacent to an inner wall of the box body along a second direction, a first gap is formed between the first battery monomer group and the inner wall of the box body, and the first direction is perpendicular to the second direction; the limiting beam is located in the containing cavity and is located on at least one side of the at least one battery monomer group along the first direction; and the first blocking piece is arranged in the first gap and is connected to a side wall of a battery monomer adjacent to the limiting beam in the first battery monomer group. The battery device provided in the application can improve the problem of failure of parts in the box body caused by thermal runaway of the battery monomers.

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] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a crucial factor in its development.

[0003] The battery pack includes a housing, which contains individual battery cells. Currently, thermal runaway of a single battery cell can cause burns to components located near the inner wall of the housing, leading to component failure and affecting the stability and reliability of the battery pack. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one object of this application is to provide a battery device and an electrical device to improve the problem of component failure within the casing caused by thermal runaway of individual battery cells.

[0005] An embodiment of the first aspect of this application provides a battery device, comprising: a housing, at least one battery cell assembly, a limiting beam, and a first stop. The housing has a receiving cavity; at least one battery cell assembly is received within the receiving cavity, each battery cell assembly comprising a plurality of battery cells arranged along a first direction, and the at least one battery cell assembly comprising a first battery cell assembly arranged adjacent to the inner wall of the housing along a second direction, the first battery cell assembly having a first gap with the inner wall of the housing, the first direction being perpendicular to the second direction; the limiting beam is located within the receiving cavity, and the limiting beam is located on at least one side of the at least one battery cell assembly along the first direction; the first stop is disposed within the first gap, and the first stop is connected to the side wall of the battery cell in the first battery cell assembly adjacent to the limiting beam.

[0006] In the technical solution of this application embodiment, the first baffle is disposed within the first gap, which can block the thermal runaway gas spreading from the area where the limiting beam is located into the first gap, reducing the probability of the high-temperature gas scalding other parts disposed within the first gap. Furthermore, the first baffle is disposed on the side wall of the battery cell adjacent to the limiting beam in the first battery cell group, which can provide some protection against the battery cell deformation and compression directly scalding other parts in the first gap, thus improving the overall problem of component failure within the casing caused by thermal runaway of the battery cell.

[0007] In some embodiments, the battery device further includes: a heat exchange structure located within the accommodating cavity, the heat exchange structure including a heat exchange tube, the heat exchange tube being at least located within a first gap and extending along a first direction within the first gap, and a first baffle located above at least a portion of the heat exchange tube. Thus, the first baffle can, to a certain extent, prevent thermal runaway gas in the area where the limiting beam is located from passing above the heat exchange tube, reducing the probability of high-temperature gas scalding the heat exchange tube within the first gap and improving the protection of the heat exchange tube.

[0008] In some embodiments, the first baffle spans the heat exchange tube along the second direction. Thus, the first baffle can block the thermal runaway gas to a certain extent along the entire width of the heat exchange tube, further reducing the probability of the thermal runaway gas in the area where the limiting beam is located spreading along the length of the heat exchange tube above it, thereby further improving the protection effect on the heat exchange tube.

[0009] In some embodiments, the first baffle has a first wall portion and a second wall portion disposed opposite to each other along a first direction. The first wall portion is closer to the limiting beam than the second wall portion. The heat exchange structure further includes a heat exchange plate and a current collector. The heat exchange plate is located between two adjacent battery cells along the first direction. The current collector is used to connect the heat exchange channels of the heat exchange plate and the heat exchange channels of the heat exchange tube. The current collector protrudes from the outer periphery of the heat exchange tube. The first wall portion is adjacent to the current collector disposed near the limiting beam. On a projection plane parallel to the second direction, the orthographic projection of the first wall portion and the orthographic projection of the current collector partially overlap. Thus, the first wall portion and the current collector partially overlap to form a shield, preventing thermal runaway gas spreading from the area where the limiting beam is located to the first gap from passing through in a straight line. This has a certain turbulence effect on the thermal runaway gas, further preventing the thermal runaway gas from spreading in the first gap, thereby further reducing the probability of the high-temperature gas scalding the heat exchange tube.

[0010] In some embodiments, on a projection plane parallel to the second direction, the overlapping portion of the orthographic projection of the first wall and the orthographic projection of the current collector is denoted as the overlap region. Along the second direction, the width of the overlap region is greater than or equal to the width of the heat exchange tube. This allows the width of the overlapping portion of the first wall and the current collector to cover the entire width of the heat exchange tube, thereby blocking thermal runaway gas along the entire width of the heat exchange tube and further reducing the probability of thermal runaway gas spreading along the length of the heat exchange tube above it.

[0011] In some embodiments, the first baffle has a cavity inside, with an opening facing the heat exchange tube, and at least a portion of the current collector extends into the cavity. The cavity inside the first baffle provides it with a certain degree of elastic cushioning. Thus, when a battery cell experiences thermal runaway and deforms in the second direction, the first baffle can undergo elastic deformation, effectively preventing direct burns to the heat exchange tube due to the deformation and compression of the battery cell. Furthermore, the fact that the current collector can extend into the cavity means the first baffle does not need to avoid the current collector, allowing for flexible adjustment of its size and position to optimize its protective effect.

[0012] In some embodiments, the first baffle also has reinforcing ribs located within the cavity to divide the cavity into multiple sub-cavities arranged along the first direction. By providing reinforcing ribs, the first baffle possesses both elastic buffering characteristics and a certain degree of strength, which to some extent prevents the first baffle from being excessively compressed and deformed when the battery cell deforms. This allows the first baffle to still provide some resistance to thermal runaway gas spreading from the area where the limiting beam is located into the first gap, thus protecting the heat exchange tube.

[0013] In some embodiments, the battery device further includes a heat insulation element located within the accommodating cavity, the heat insulation element covering at least a portion of the heat exchange tube. The heat insulation element can prevent thermal runaway gas from spreading directly from the top of the battery cell to the first gap from scalding the heat exchange tube. Thus, through the heat insulation element and the first baffle, thermal runaway gas spreading from different directions to the top of the heat exchange tube can be blocked to a certain extent, further enhancing the protection effect on the heat exchange tube.

[0014] In some embodiments, the first stop has a third wall portion on one side along the second direction, the third wall portion being connected to the sidewall of the battery cell; wherein, a gap exists between the heat exchange tube located within the first gap and the sidewall of the battery cell, and on a projection plane parallel to the first direction, the orthographic projection of the third wall portion at least partially coincides with the orthographic projection of the heat exchange tube located within the first gap. Thus, a portion of the third wall portion of the first stop is located within at least a portion of the gap between the battery cell and the heat exchange tube located near the limiting beam. Even if the battery cell located near the limiting beam undergoes significant deformation in the second direction during thermal runaway, the third wall portion will contact the heat exchange tube first, rather than the battery cell directly contacting the heat exchange tube, greatly reducing the probability of the battery cell deformation and compression directly scalding the heat exchange tube.

[0015] In some embodiments, the first stop is bonded to the sidewall of the battery cell. This eliminates the need for openings in the sidewall of the battery cell, avoids damaging the battery cell's structure, simplifies the connection structure, does not occupy the volume of the accommodating cavity, and thus does not affect the arrangement of other components.

[0016] In some embodiments, the first stop further extends to correspond with the limiting beam. This further enhances the blocking effect on thermal runaway gas spreading from the area of ​​the limiting beam into the first gap.

[0017] In some embodiments, the battery device further includes: at least one beam structure and a second baffle. The beam structure is located within a receiving cavity and extends along a second direction to divide the receiving cavity into multiple sub-receiving cavities. Each sub-receiving cavity is used to accommodate a battery cell assembly. The height of the beam structure is lower than the height of the battery cell, and along the second direction, there is a second gap between the beam structure and the inner wall of the housing that communicates with the first gap. The second baffle is located at the end of the beam structure along the second direction and is at least partially located within the second gap. The height of the second baffle is greater than the height of the beam structure. By setting the second baffle at the end of the beam structure along the second direction and having a height greater than the height of the beam structure, the second baffle can provide a certain degree of obstruction for thermal runaway gases in the exhaust channel, preventing thermal runaway gases from spreading from the exhaust channel to the second gap and the first gap to a certain extent, thereby further improving the problem of component failure within the housing caused by thermal runaway of battery cells.

[0018] In some embodiments, the height of the second baffle is greater than or equal to the height of the battery cell. This allows the second baffle to better block the exhaust passage at the top of the beam structure in the height direction, further impeding thermal runaway gases from the exhaust passage, thereby further reducing the probability of thermal runaway gases spreading to the second gap and the first gap and scalding other parts inside the casing.

[0019] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0023] Figure 2This is a schematic diagram of the structure of a battery device according to some embodiments of this application;

[0024] Figure 3 for Figure 2 Enlarged view of point C in the middle;

[0025] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0026] Figure 5 This is a three-dimensional structural schematic diagram of the first stop member in some embodiments of this application;

[0027] Figure 6 This is a side view of the first stop in some embodiments of this application;

[0028] Figure 7 This is a schematic diagram showing the relative positional relationship between the heat insulation component, the first baffle, the heat exchange tube, and the battery cell in some embodiments of this application;

[0029] Figure 8 for Figure 2 Enlarged view at point D;

[0030] Figure 9 This is a three-dimensional structural schematic diagram of the second stop in some embodiments of this application;

[0031] Figure 10 for Figure 8 Cross-sectional view along the BB direction;

[0032] Figure 11 This is a schematic diagram showing the relative positional relationship between the heat insulation component, the first baffle, the second baffle, the heat exchange tube, and the battery cell in some embodiments of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] Vehicle 1000, first wall 1021, second wall 1022, third wall 1023, fourth wall 1024, heat exchange tube 1031, heat exchange plate 1032, current collector 1033, first heat insulation part 1041, second heat insulation part 1042, main body 1061, guide part 1062, limiting part 1063;

[0035] Battery device 100, limiting beam 101, first stop 102, heat exchange structure 103, heat insulation component 104, beam structure 105, second stop 106, controller 200, motor 300.

[0036] The accommodating cavity 10, the side beam 11, the battery cell 20, the first gap 31, and the second gap 32;

[0037] First direction X, second direction Y. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0044] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0045] 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.

[0046] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0047] The battery assembly includes a housing containing individual battery cells. When a battery cell experiences thermal runaway, the resulting thermal runaway gas may spread along the inner wall of the housing. The high-temperature thermal runaway gas can scald components located near the inner wall of the housing, leading to component failure.

[0048] For example, a limiting beam is provided inside the housing and abuts against the side of the battery cells along the stacking direction of multiple battery cells. The limiting beam provides expansion space for the battery cells during charging and discharging and applies a preload force to the battery cells, constraining their displacement. The limiting beam is located near the inner wall of the housing. Exemplarily, the inner wall of the housing may include two opposing first inner walls and two opposing second inner walls, with the first inner walls perpendicular to the second inner walls. The first and second inner walls are joined to enclose and form a space for accommodating the battery cells. The limiting beam may be located on the first inner wall, and there may be a gap between the second inner wall and the battery cells. This gap can be used to accommodate other components in the battery assembly, such as heat exchange tubes, connecting wires, etc.

[0049] Because the limiting beam is located close to the battery cell, a continuous longitudinal channel can be formed above the limiting beam when the battery cell experiences thermal runaway. Furthermore, there is a certain gap between the limiting beam and the first inner wall. The thermal runaway gas will flow from above the limiting beam to the gap between the limiting beam and the first inner wall. This will cause the thermal runaway gas to spread along the upper part of the limiting beam and the gap between the limiting beam and the first inner wall to the second inner wall, thus causing the thermal runaway gas to spread along the inner wall of the housing. The high temperature of the thermal runaway gas may burn the parts located on one side of the second inner wall.

[0050] Furthermore, due to the high rigidity of the limiting beam, if a battery cell located closest to the limiting beam deforms due to thermal runaway, it may not deform in the direction of the limiting beam, but rather towards the side of the second inner wall. This deformed battery cell could then compress and burn components located on the second inner wall, leading to component failure. If components inside the casing fail, it will affect the stability and reliability of the battery device.

[0051] Based on the above considerations, a battery device is designed, comprising: a housing, at least one battery cell assembly, a limiting beam, and a first stop. The housing has a receiving cavity; at least one battery cell assembly is housed within the receiving cavity, each battery cell assembly comprising multiple battery cells arranged along a first direction, and the at least one battery cell assembly comprising a first battery cell assembly arranged adjacent to the inner wall of the housing along a second direction, with a first gap between the first battery cell assembly and the inner wall of the housing, the first direction being perpendicular to the second direction; the limiting beam is located within the receiving cavity, and is located on at least one side of the at least one battery cell assembly along the first direction; the first stop is disposed within the first gap, and the first stop is connected to the side wall of the battery cell in the first battery cell assembly adjacent to the limiting beam.

[0052] The first baffle is located within the first gap and can block thermal runaway gas from spreading from the area of ​​the limiting beam into the first gap, reducing the probability of high-temperature gas scalding other parts located within the first gap. Furthermore, the first baffle is located on the side wall of the battery cell adjacent to the limiting beam in the first battery cell group, which can provide some protection against the direct scalding of other parts in the first gap due to deformation and compression of the battery cell, thus improving the overall problem of component failure within the casing caused by thermal runaway of the battery cell.

[0053] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power system comprising the battery cells and batteries disclosed in this application can be used to construct such an electrical device or energy storage device.

[0054] This application provides an electrical device that uses a battery 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.

[0055] This application also provides an energy storage device that uses a battery as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0056] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0057] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0058] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] This application provides a battery device, comprising: a housing, at least one battery cell assembly, a limiting beam, and a first stop. The housing has a receiving cavity; at least one battery cell assembly is housed within the receiving cavity, each battery cell assembly comprising a plurality of battery cells arranged along a first direction, and the at least one battery cell assembly comprising a first battery cell assembly arranged adjacent to the inner wall of the housing along a second direction, the first battery cell assembly having a first gap with the inner wall of the housing, the first direction being perpendicular to the second direction; the limiting beam is located within the receiving cavity, and the limiting beam is located on at least one side of the at least one battery cell assembly along the first direction; the first stop is disposed within the first gap, and the first stop is connected to the side wall of the battery cell in the first battery cell assembly adjacent to the limiting beam.

[0060] Please refer to Figure 2 The battery device includes a housing and battery cells 20, with the battery cells 20 housed within the housing. The housing provides a accommodating cavity 10 for the battery cells, and the housing can have various structures. In some embodiments, the housing may include a first portion and a second portion, which overlap each other, together defining the accommodating cavity 10 for housing the battery cells. The second portion may be a hollow structure with one open end, while the first portion may be a plate-like structure, with the first portion covering the open side of the second portion so that the first and second portions together define the accommodating cavity 10. Alternatively, both the first and second portions may be hollow structures with one open side, with the open side of the first portion covering the open side of the second portion. Of course, the housing formed by the first and second portions can have various shapes, such as a cylinder, a cuboid, etc.

[0061] Exemplarily, the first and / or second portions include side beams surrounding the outer periphery of the battery cell assembly for enclosing the sidewalls forming the accommodating cavity 10.

[0062] In a battery device, there can be multiple battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of these battery cells is housed within a casing. Alternatively, the battery device can consist of multiple battery cells first connected in series, parallel, or a combination thereof to form battery modules, and then these modules are connected in series, parallel, or a combination thereof to form a whole, which is also housed within a casing. The battery device may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells.

[0063] Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell can be cylindrical, flat, cuboid, or other shapes.

[0064] In some embodiments, at least one battery cell group can be a battery cell group, which is a first battery cell group and is arranged adjacent to the inner wall of the casing in a second direction.

[0065] In other embodiments, at least one battery cell group may also be multiple battery cell groups. For example... Figure 2As shown, multiple battery cell groups can be arranged in one or more columns. These columns are arranged along a second direction Y. Each column can include at least one battery cell group, and the multiple battery cells 20 within each battery cell group are arranged along a first direction X. When each column includes multiple battery cell groups, these groups are arranged along the first direction X. Both the first direction X and the second direction Y are perpendicular to the height direction of the battery cells 20. Among the multiple columns, two columns are arranged closest to the inner wall of the housing along the second direction Y. Each battery cell group in each column is referred to as the first battery cell group. It is understood that this arrangement is for ease of demonstration of the internal structure of the housing. Figure 2 The diagram only shows a portion of the battery cells; in reality, the battery cells could fill the entire cavity 10.

[0066] The limiting beam 101 can be located at both ends of each row of battery cells in the multi-row battery cell group. In other words, there are two limiting beams 101. The two limiting beams 101 are arranged opposite each other along the first direction X. Multiple battery cells are located between the two limiting beams 101, and multiple battery cells can be arranged on one side of each limiting beam 101 along the first direction X.

[0067] In some embodiments, the top height of the limiting beam 101 may be lower than the top height of the battery cell 20, so that the top of the limiting beam 101 is recessed relative to the top of the battery cell 20 to form a continuous longitudinal channel, such as... Figure 2 as well as Figure 3 As shown by the dashed line, thermal runaway gas will flow more along the longitudinal channel at the top of the limiting beam 101 and flow towards the first gap 31.

[0068] In some embodiments, the limiting beam can be an expansion beam.

[0069] When the battery cells are arranged in multiple rows along the second direction Y, the two outermost rows of battery cells are located adjacent to the inner wall of the housing. Therefore, the two outermost rows of battery cells are referred to as the two first battery cell rows. Each of the two first battery cell rows has a first gap 31 between itself and the inner wall of the housing adjacent to it. The inner wall of the housing adjacent to the first battery cell rows can be the side wall of the side beam 11 facing the receiving cavity 10. There are multiple first stoppers 102. For example, when there is only one limiting beam 101, each of the two first battery cell rows has one battery cell 20 adjacent to the limiting beam 101. Therefore, there are two first stoppers 102, and the two first stoppers 102 are respectively disposed on the side wall of the battery cell 20 adjacent to the limiting beam 101 in the two first battery cell rows. For example, when there are two limiting beams 101, each column of first battery cell group has two battery cells 20 adjacent to the two limiting beams 101 respectively, so the number of first stops 102 is four.

[0070] It is understandable that, since the first baffle 102 is disposed on the side wall of the battery cell 20 adjacent to the limiting beam 101 in the first battery cell group, in other words, the first baffle 102 is located at the end of the first gap 31 near the limiting beam 101, the first baffle 102 can promptly block the thermal runaway gas spreading from the area where the limiting beam 101 is located to the first gap 31, thereby minimizing the possibility of excessive thermal runaway gas flowing into the first gap 31.

[0071] In some embodiments, the maximum cross-sectional area of ​​the first baffle 102 in the direction perpendicular to the first X can be equal to the maximum cross-sectional area of ​​the first gap 31 in the direction perpendicular to the first X. That is, the first baffle 102 can completely block the end of the first gap 31, thereby maximally preventing thermal runaway gas from flowing into the first gap 31.

[0072] In other embodiments, the maximum cross-sectional area of ​​the first stop 102 in the direction perpendicular to the first X can be smaller than the maximum cross-sectional area of ​​the first gap 31 in the direction perpendicular to the first X. That is, the first stop 102 does not block the end of the first gap 31, thus providing layout space for the routing of other parts in the first gap 31 to locations outside the first gap 31.

[0073] In the above technical solution, the first baffle 102 is disposed within the first gap 31, which can block the thermal runaway gas spreading from the area of ​​the limiting beam 101 into the first gap 31, reducing the probability of the high-temperature gas scalding other parts disposed within the first gap 31. Furthermore, due to the high rigidity of the limiting beam 101, when the battery cell 20 disposed adjacent to the limiting beam 101 undergoes thermal runaway and deformation, it cannot deform along the first direction X, and instead deforms towards the second direction Y. That is, the battery cell 20 will deform towards the first gap 31. Since the first baffle 102 is disposed on the side wall of the battery cell 20 and located within the first gap 31, it can provide some protection against the battery cell 20 deforming and squeezing directly scalding other parts within the first gap 31, thus improving the overall problem of component failure within the casing caused by thermal runaway of the battery cell 20.

[0074] like Figures 2 to 4 As shown, according to some embodiments of this application, the battery device further includes: a heat exchange structure 103 located within the accommodating cavity 10, the heat exchange structure 103 including a heat exchange tube 1031, the heat exchange tube 1031 being at least located within a first gap 31 and extending along a first direction X within the first gap 31, and a first baffle 102 located above at least a portion of the heat exchange tube 1031.

[0075] The heat exchange tube 1031 has a heat exchange channel for the flow of heat exchange medium, which is used to exchange heat with the battery cell 20 to cool or heat the battery cell 20.

[0076] In some embodiments, the heat exchange tube 1031 can be integrally molded using a two-color injection molding process. The two-color injection molding process involves injection molding two different plastic materials. For example, it can be injection molded using both rigid and flexible plastic materials, with the rigid plastic located in the inner layer to form the heat exchange channel, and the flexible plastic located in the outer layer. The flexible plastic can include, but is not limited to, materials such as PP (Polypropylene) and PA (Polyamide), while the rigid plastic can include, but is not limited to, materials such as TPE (Thermoplastic Elastomer) and TPU (Thermoplastic Polyurethane).

[0077] In some embodiments, the heat exchange tube 1031 may be configured to correspond to at least one row of first battery cell groups. Exemplarily, the heat exchange tube 1031 may be mounted on the inner wall of the housing and extend along a first direction X, such that the heat exchange tube 1031 is configured to correspond to each first battery cell group in a row of first battery cell groups. For the sake of simplicity, Figure 2The diagram only shows a portion of the heat exchange tube structure. In reality, the heat exchange tube 1031 can extend from the location of one limiting beam 101 to the location of the other limiting beam 101.

[0078] In some embodiments, the battery device further includes at least one beam structure 105 located within the receiving cavity 10. The beam structure 105 extends along a second direction Y to divide the receiving cavity 10 into a plurality of sub-receiving cavities, each sub-receiving cavity for accommodating a battery cell assembly, thus allowing for a plurality of battery cell assemblies. The height of the beam structure 105 is lower than the height of the battery cell 20, and along the second direction Y, the beam structure 105 has a second gap 32 communicating with the inner wall of the housing and a first gap 31. The second gap 32 and the first gap 31 are alternately arranged along a first direction X, and a heat exchange tube 1031 extending along the first direction X passes through the first gap 31 and the second gap 32.

[0079] In some embodiments, the heat exchange tube 1031 may also be located in a region other than the first gap 31 and the second gap 32.

[0080] The first baffle 102 may be located above at least a portion of the length of the heat exchange tube 1031. Along the width direction of the heat exchange tube 1031, the first baffle 102 may cover at least a portion of the width of the heat exchange tube 1031. The length direction of the heat exchange tube 1031 is a first direction X, and the width direction is a second direction Y.

[0081] For example, the heat exchange tube 1031 may be located only on one side of the first battery cell group adjacent to the limiting beam 101. In this case, the length of the heat exchange tube 1031 along the first direction X is relatively short. If the length of the heat exchange tube 1031 along the first direction X is equal to the length of the first baffle 102, the first baffle 102 may be located above the heat exchange tube 1031 along its entire length.

[0082] For example, the heat exchange tube 1031 can also be configured corresponding to a row of first battery cell groups, which includes multiple first battery cell groups arranged along the first direction X. Since the first baffle 102 is connected to the sidewall of the battery cell 20 adjacent to the limiting beam 101 in the first battery cell group, the length of the heat exchange tube 1031 is greater than the length of the first baffle 102 along the first direction X. Thus, the first baffle 102 is only located above a portion of the length of the heat exchange tube 1031. It is understood that since the first baffle 102 is located at the end of the first gap 31, correspondingly, for the heat exchange tube 1031 located in the first gap 31, the first baffle 102 is also configured at its end. In this way, the first baffle 102 can effectively prevent excessive thermal runaway gas from spreading from the end of the heat exchange tube 1031 to the rest of the heat exchange tube 1031, thereby providing good protection for the entire heat exchange tube 1031 located in the first gap 31.

[0083] In the above technical solution, the first baffle 102 is located above at least part of the heat exchange tube 1031, which can block the thermal runaway gas in the area where the limiting beam 101 is located from passing over the heat exchange tube 1031 to a certain extent, reducing the probability of the high temperature gas scalding the heat exchange tube 1031 in the first gap 31 and improving the protection effect on the heat exchange tube 1031.

[0084] like Figure 3 as well as Figure 4 As shown, according to some embodiments of this application, the first baffle 102 crosses the heat exchange tube 1031 along the second direction Y.

[0085] In other words, along the width of the heat exchange tube 1031, the first baffle 102 covers the entire width of the heat exchange tube 1031.

[0086] like Figure 6 As shown, in some embodiments, the bottom of the first baffle 102 has an arc-shaped notch that matches the outer periphery of the heat exchange tube 1031, so that the first baffle 102 can provide a good shielding effect for the heat exchange tube 1031.

[0087] In the above technical solution, the first baffle 102 can block the thermal runaway gas to a certain extent along the entire width of the heat exchange tube 1031, further reducing the probability of the thermal runaway gas in the area where the limiting beam 101 is located spreading along the length of the heat exchange tube 1031 above the heat exchange tube 1031, thereby further improving the protection effect on the heat exchange tube 1031.

[0088] refer to Figures 3 to 6According to some embodiments of this application, the first stop 102 has a first wall portion 1021 and a second wall portion 1022 disposed opposite to each other along the first direction X. The first wall portion 1021 is closer to the limiting beam 101 than the second wall portion 1022. The heat exchange structure 103 further includes a heat exchange plate 1032 and a current collector 1033. The heat exchange plate 1032 is located between two adjacent battery cells 20 along the first direction X. The current collector 1033 is used to connect the heat exchange channel of the heat exchange plate 1032 and the heat exchange channel of the heat exchange tube 1031. The current collector 1033 protrudes from the outer periphery of the heat exchange tube 1031. The first wall portion 1021 is adjacent to the current collector 1033 disposed near the limiting beam 101. On a projection plane parallel to the second direction Y, the orthographic projection of the first wall portion 1021 and the orthographic projection of the current collector 1033 partially overlap.

[0089] The heat exchange plate 1032 has a heat exchange channel for the flow of heat exchange medium. The heat exchange medium in the heat exchange tube 1031 can be transported to the heat exchange plate 1032 through the current collector 1033. Since the heat exchange plate 1032 is located between two adjacent battery cells 20, it can cool or heat the battery cells 20.

[0090] In some embodiments, the current collector 1033 has a connecting channel for connecting the heat exchange channel of the heat exchange tube 1031 and the heat exchange channel of the heat exchange plate 1032. One end of the connecting channel can be connected to the heat exchange tube 1031, and the other end can be connected to the heat exchange plate 1032.

[0091] In some embodiments, there may be multiple heat exchange plates 1032, and the number of current collectors 1033 corresponds to the number of heat exchange plates 1032. Multiple current collectors 1033 may be arranged at intervals along the first direction X. It is understood that, since the current collectors 1033 protrude from the outer periphery of the heat exchange tube 1031, the current collector 1033 closest to the limiting beam 101 among the multiple current collectors can also prevent some of the thermal runaway gas from spreading along the first direction X to the top of the heat exchange tube 1031.

[0092] The first wall portion 1021 and the second wall portion 1022 are arranged opposite to each other along the first direction X, and the first wall portion 1021 is closer to the limiting beam 101. Therefore, the first wall portion 1021 first comes into contact with the thermal runaway gas that spreads from the area where the limiting beam 101 is located to the first gap 31 and blocks it.

[0093] A projection plane parallel to the second direction Y means that the projection plane is parallel to the second direction Y. Since the second direction Y is perpendicular to the first direction X, the projection plane is perpendicular to the first direction X. On this projection plane, the orthographic projection of the first wall portion 1021 partially overlaps with the orthographic projection of the current collector 1033. That is, along the first direction X, the first wall portion 1021 and the current collector 1033 partially overlap.

[0094] The first wall portion 1021 and the current collector 1033 partially overlap to form a shield, thus preventing the thermal runaway gas spreading from the area where the limiting beam 101 is located to the first gap 31 from passing through in a straight line. This has a certain turbulence effect on the thermal runaway gas, further blocking the thermal runaway gas from spreading in the first gap 31, thereby further reducing the probability of the high-temperature gas scalding the heat exchange tube 1031.

[0095] In some embodiments, the first wall portion 1021 may also have a certain gap with the current collector 1033 disposed adjacent to the limiting beam 101.

[0096] In other embodiments, the first wall portion 1021 may contact the current collector 1033 disposed adjacent to the limiting beam 101, thereby more effectively preventing thermal runaway gas from spreading within the first gap 31 to the top of the heat exchange tube 1031.

[0097] In some embodiments, the current collector 1033 disposed adjacent to the limiting beam 101 may be located on the side of the first wall portion 1021 away from the second wall portion 1022.

[0098] In other embodiments, the current collector 1033 disposed near the limiting beam 101 may also be located on the side of the first wall portion 1021 near the second wall portion 1022.

[0099] In the above technical solution, the first wall portion 1021 and the current collector 1033 partially overlap to form a shield. This prevents the thermal runaway gas that spreads from the area where the limiting beam 101 is located to the first gap 31 from passing through in a straight line, thus playing a certain turbulence effect on the thermal runaway gas and further blocking the thermal runaway gas from spreading in the first gap 31, thereby further reducing the probability of the high-temperature gas scalding the heat exchange tube 1031.

[0100] According to some embodiments of this application, on a projection plane parallel to the second direction Y, the overlapping portion of the orthographic projection of the first wall portion 1021 and the orthographic projection of the current collector 1033 is denoted as the overlapping area. Along the second direction Y, the width of the overlapping area is greater than or equal to the width of the heat exchange tube 1031.

[0101] In some embodiments, along the second direction Y, the maximum width of the first wall portion 1021 may be greater than the maximum width of the current collector 1033. The width of the first wall portion 1021 may be the same as the width of the second wall portion 1022.

[0102] In some embodiments, the first wall portion 1021 may overlap with the entire width of the current collector 1033 in the second direction Y.

[0103] In the above technical solution, the width of the overlapping portion of the first wall portion 1021 and the current collector 1033 can cover the entire width of the heat exchange tube 1031, thereby blocking the thermal runaway gas in the entire width direction of the heat exchange tube 1031 and further reducing the probability of the thermal runaway gas spreading above the heat exchange tube 1031 along the length direction of the heat exchange tube 1031.

[0104] According to some embodiments of this application, the first baffle 102 has a cavity inside, the cavity having an opening facing the heat exchange tube 1031, and at least a portion of the current collector 1033 extends into the cavity.

[0105] In other words, the side of the first baffle 102 facing the heat exchange tube 1031 is an open structure, so that the current collector 1033 can extend into the cavity.

[0106] In some embodiments, only a portion of the current collector 1033 located adjacent to the limiting beam 101 may extend into the cavity.

[0107] In other embodiments, there may be multiple current collectors 1033, and at least two adjacent current collectors 1033 may extend into the cavity. The current collectors 1033 extending into the cavity include at least the current collectors 1033 disposed adjacent to the limiting beam 101.

[0108] In the above technical solution, the first baffle 102 has a cavity inside, giving it a certain elastic buffering characteristic. Thus, when the battery cell 20 experiences thermal runaway and deforms in the second direction Y, the first baffle 102 can provide elastic deformation, effectively preventing the heat exchange tube 1031 from being directly burned by the deformation and compression of the battery cell 20. Furthermore, the current collector 1033 can extend into the cavity, allowing the first baffle 102 to be positioned without needing to avoid it. This facilitates flexible adjustment of the size and position of the first baffle 102 to optimize its protective function.

[0109] According to some embodiments of this application, the first stop 102 also has a reinforcing rib located in the cavity to divide the cavity into a plurality of sub-cavities arranged along the first direction X.

[0110] For example, such as Figure 5 as well as Figure 6 As shown, the first stop 102 may include a third wall portion and a fourth wall portion disposed opposite each other along the second direction Y. The first wall portion 1021, the third wall portion 1023, the second wall portion 1022, and the fourth wall portion 1024 are connected in sequence to enclose a cavity. A reinforcing rib may connect the third wall portion and the fourth wall portion to divide the cavity into multiple sub-cavities arranged along the first direction X, for example, it may be divided into two sub-cavities, and a current collector 1033 may be inserted into each sub-cavity.

[0111] Since the reinforcing rib is connected to the inner wall of the cavity along the second direction Y, the reinforcing rib can provide rigid support for the first stop 102 in the second direction Y. In this way, when the battery cell 20 connected to the first stop 102 undergoes thermal runaway and deforms along the second direction Y, the reinforcing rib can, to a certain extent, prevent the first stop 102 from undergoing large deformation along the second direction Y due to the deformation and compression of the battery cell 20.

[0112] In the above technical solution, by setting reinforcing ribs, the first baffle 102 has both elastic buffering characteristics and a certain strength, which to a certain extent prevents the first baffle 102 from being squeezed too much and deformed when the battery cell 20 is deformed. This allows the first baffle 102 to still play a certain role in blocking the thermal runaway gas that spreads from the area where the limiting beam 101 is located to the first gap 31, thus protecting the heat exchange tube 1031.

[0113] refer to Figure 2 as well as Figure 7 According to some embodiments of this application, the battery device further includes: a heat insulation member 104 located within the accommodating cavity 10, the heat insulation member 104 covering at least a portion of the heat exchange tube 1031.

[0114] like Figure 7 As shown, in some embodiments, the heat insulation member 104 may include a first heat insulation portion 1041 and a second heat insulation portion 1042, which are connected to each other. The first heat insulation portion 1041 may be located above the heat exchange tube 1031, and the second heat insulation portion 1042 is bent relative to the first heat insulation portion 1041 and may be located on the side of the heat exchange tube 1031 away from the first battery cell assembly. Exemplarily, the cross-sectional shape of the heat insulation member 104 along the direction perpendicular to the first direction X may be "L" shaped.

[0115] To illustrate the structure of the heat exchange tubes and the first baffle, Figure 2 The diagram only shows a portion of the structure of the heat insulation component 104. In some embodiments, the heat insulation component 104 can be provided for each of the two outermost rows of first battery cell groups. That is, each of the two outermost rows of first battery cell groups is provided with a corresponding heat insulation component 104, which is used to cover the heat exchange tube 1031 on one side of the corresponding first battery cell group.

[0116] For example, along the first direction X, the length of the first heat insulation portion 1041 and the length of the second heat insulation portion 1042 are the same as the arrangement length of the corresponding first battery cell group.

[0117] In some embodiments, the first heat insulation portion 1041 may be connected to the shoulder of the battery cell 20.

[0118] In some embodiments, the heat insulation member 104 may also cover the first baffle member 102.

[0119] In some embodiments, the heat insulation element 104 may include, but is not limited to, mica paper, heat insulation pad, etc.

[0120] In some embodiments, the battery device further includes a mica plate located on top of multiple battery cell groups to prevent thermal runaway gas or thermal runaway material emitted from one battery cell 20 from spreading to other unrunaway battery cells 20, thus avoiding large-scale thermal runaway. If too much thermal runaway gas or material is emitted from a battery cell 20 during thermal runaway, the mica plate may burn through at high temperatures, allowing the thermal runaway gas emitted from the battery cell 20 to spread from the top of the battery cell 20 to above the heat exchange tube 1031 of the first gap 31.

[0121] In other embodiments, when the battery device is not equipped with a mica plate, the thermal runaway gas generated when the battery cell 20 experiences thermal runaway will also spread from the top of the battery cell 20 to the heat exchange tube 1031 of the first gap 31.

[0122] The heat insulation element 104 is provided above at least part of the heat exchange tube 1031, so as to prevent thermal runaway gas from spreading directly from the top of the battery cell 20 to the first gap 31 from scalding the heat exchange tube 1031.

[0123] It is understandable that, since the heat insulation component 104 and the surface of the heat exchange tube 1031 are not in complete contact, although the heat insulation component 104 can prevent thermal runaway gas from spreading directly from the top of the battery cell 20 to the first gap 31 and scalding the heat exchange tube 1031, thermal runaway gas spreading from the area of ​​the limiting beam 101 to the first gap 31 can still enter through the gap between the heat insulation component 104 and the heat exchange tube 1031 and scald the heat exchange tube 1031. In this embodiment, by setting the first baffle 102 at the first gap 31, and the first baffle 102 being located at the end of the first gap 31 near the limiting beam 101, the first baffle 102 can promptly block the thermal runaway gas spreading from the area of ​​the limiting beam 101 to the first gap 31. As can be seen, the embodiments of this application, through the heat insulation component 104 and the first baffle 102, can respectively block the thermal runaway gas spreading from different directions to the top of the heat exchange tube 1031 to a certain extent, thereby further enhancing the protection effect on the heat exchange tube 1031.

[0124] like Figure 4 as well as Figure 5As shown, according to some embodiments of this application, the first baffle 102 has a third wall portion 1023 on one side along the second direction Y, and the third wall portion 1023 is connected to the side wall of the battery cell 20; wherein, there is a gap between the heat exchange tube 1031 located in the first gap 31 and the side wall of the battery cell 20, and on the projection plane parallel to the first direction X, the orthographic projection of the third wall portion 1023 at least partially coincides with the orthographic projection of the heat exchange tube 1031 located in the first gap 31.

[0125] The heat exchange tube 1031 located in the first gap 31 does not contact the side wall of the battery cell 20. In this way, when the battery cell 20 undergoes thermal runaway and deforms in the second direction Y, it will not directly squeeze and burn the heat exchange tube 1031.

[0126] The projection plane parallel to the first direction X means that the projection plane is parallel to the first direction X, and the first direction X is perpendicular to the second direction Y. Therefore, the orthographic projection of the third wall portion 1023 and the orthographic projection of the heat exchange tube 1031 at least partially coincide on the projection plane, and the heat exchange tube 1031 and the third wall portion 1023 are at least partially opposite each other in the second direction Y.

[0127] Therefore, a portion of the third wall 1023 of the first stop 102 is located within at least a portion of the gap between the battery cell 20 and the heat exchange tube 1031 located near the limiting beam 101. Thus, even if the battery cell 20 located near the limiting beam 101 deforms significantly in the second direction Y during thermal runaway, the third wall 1023 will be the first to contact the heat exchange tube 1031, rather than the battery cell 20 directly contacting the heat exchange tube 1031. This greatly reduces the probability of the battery cell 20 deforming and directly scalding the heat exchange tube 1031.

[0128] In some embodiments, the material of the first baffle 102 has better heat resistance than the material of the heat exchange tube 1031. This makes the first baffle 102 less likely to be burned by the high temperature of the battery cell 20 and melt and deform when it comes into direct contact with the thermally runaway battery cell 20, thus providing better protection for the heat exchange tube 1031.

[0129] The heat resistance of the material of the first baffle 102 is better than that of the material of the heat exchange tube 1031, which can be: the heat distortion temperature of the material of the first baffle 102 is greater than that of the material of the heat exchange tube 1031, and / or the Vicat softening temperature of the material of the first baffle 102 is greater than that of the material of the heat exchange tube 1031, and / or the flame retardant rating of the material of the first baffle 102 is higher than that of the material of the heat exchange tube 1031.

[0130] According to some embodiments of this application, the first stop 102 is bonded to the side wall of the battery cell 20.

[0131] In some embodiments, the first stop 102 and the sidewall of the battery cell 20 can be bonded together using structural adhesive, thermally conductive adhesive, sealant, high-temperature resistant adhesive, epoxy resin adhesive, polyurethane adhesive, acrylic adhesive, etc.

[0132] In some embodiments, the first stop 102 and the side wall of the battery cell 20 can also be bonded together by double-sided tape, foam double-sided tape, thermally conductive double-sided tape, acrylic double-sided tape, etc.

[0133] In some embodiments, the first stop 102 and the sidewall of the battery cell 20 can also be bonded together by hot melt adhesive or hot melt welding after heating and cooling.

[0134] In some embodiments, the first stop 102 and the sidewall of the battery cell 20 can also be bonded together by pressure-sensitive adhesive.

[0135] The adhesive connection does not require opening holes in the side wall of the battery cell 20, will not damage the structure of the battery cell 20, and the connection structure is simple and will not occupy the volume of the accommodating cavity 10, thus not affecting the arrangement of other parts.

[0136] According to some embodiments of this application, the first stop 102 also extends to correspond to the limiting beam 101.

[0137] Along the second direction Y, there is a third gap between the limiting beam 101 and the inner wall of the box, and the third gap communicates with the first gap 31. The first stop 102 of the side wall of the battery cell 20 adjacent to the limiting beam 101 also extends into the third gap and corresponds to the position of the limiting beam 101.

[0138] In some embodiments, the area of ​​the first stop 102 corresponding to the limiting beam 101 can be connected to the limiting beam 101, for example, it can be bolted or riveted to the limiting beam 101, and the area of ​​the first stop 102 corresponding to the battery cell 20 can be bonded to the side wall of the battery cell 20.

[0139] In other embodiments, the first stop 102 corresponding to the limiting beam 101 may not be connected to the limiting beam 101. Since the limiting beam 101 is fixed to the side wall of the battery cell 20, and the battery cell 20 and the limiting beam 101 have a fixed positional relationship, even if the first stop 102 is not connected to the limiting beam 101, the position of the first stop 102 and the limiting beam 101 can still be maintained.

[0140] In the above technical solution, by setting the first stop 102 to extend to correspond to the position of the limiting beam 101, the blocking effect on thermal runaway gas spreading from the area where the limiting beam 101 is located to the first gap 31 can be further increased.

[0141] refer to Figure 2 , Figures 8 to 10 According to some embodiments of this application, the battery device further includes: at least one beam structure 105, and a second stop 106. The beam structure 105 is located within the receiving cavity 10 and extends along a second direction Y to divide the receiving cavity 10 into a plurality of sub-receiving cavities, each sub-receiving cavity for accommodating a battery cell assembly. The height of the beam structure 105 is lower than the height of the battery cell 20, and along the second direction Y, the beam structure 105 has a second gap 32 communicating with the inner wall of the housing and a first gap 31. The second stop 106 is disposed at the end of the beam structure 105 along the second direction Y and is at least partially located within the second gap 32. The height of the second stop 106 is greater than the height of the beam structure 105.

[0142] The beam structure 105 may include, but is not limited to, at least one of a crossbeam and a movable beam. For example, at least one beam structure 105 may include a movable beam and a crossbeam, the movable beam and the crossbeam being spaced apart along a first direction X to divide the receiving cavity 10 into a plurality of sub-receiving cavities spaced apart along the first direction X. Each receiving cavity 10 may contain a plurality of battery cell groups, and the plurality of battery cell groups within each receiving cavity 10 may be arranged along a second direction Y.

[0143] The second stop 106 is located at both ends of the moving beam along the second direction Y and at both ends of the crossbeam along the second direction Y. That is, the number of the second stop 106 can be four.

[0144] The top height of the beam structure 105 is lower than the top height of the battery cell 20, so that the top of the beam structure 105 is recessed relative to the top of the battery cell 20, forming an exhaust channel. Even with a mica plate on top of the battery cell assembly, the thermal runaway gas generated by the battery cell 20 will still flow through the exhaust channel to the second gap 32, and then from the second gap 32 to above the heat exchange tube 1031 in the first gap 31, potentially scalding the heat exchange tube 1031. Figure 8 The dashed line with an arrow indicates the path of the thermally runaway gas flowing through beam structure 105. It is worth noting that... Figure 2 To simplify the structure, the battery cell groups on both sides of the beam structure 105 are not shown.

[0145] The height of the second baffle 106 is greater than the height of the beam structure 105, meaning that the height of the top of the second baffle 106 is greater than the height of the top of the beam structure 105. In this way, since the second baffle 106 is located at the end of the beam structure 105, it can block the exhaust channel at the top of the beam structure 105 to a certain extent, so as to prevent thermal runaway gas from spreading from above the beam structure 105 into the second gap 32 and the first gap 31.

[0146] refer to Figure 9In some embodiments, the second baffle 106 may include a main body 1061 and a guide 1062. The main body 1061 is connected to the beam structure 105, and the guide 1062 is connected to the main body 1061. At least a portion of the guide 1062 is located above the heat exchange tube 1031 to shield at least a portion of the heat exchange tube 1031 located in the second gap 32.

[0147] like Figure 11 As shown, in some embodiments, the battery device is further provided with a heat insulation element 104, which may also be located above the guide portion 1062.

[0148] In some embodiments, the main body 1061 may be bolted or riveted to the beam structure 105.

[0149] The main body 1061 is connected to the beam structure 105 and can be used to block the end of the exhaust channel.

[0150] In some embodiments, the second stop 106 may further include a limiting portion 1063, which is connected to the main body 1061 and is at least partially located in the second gap 32. The limiting portion 1063 can play a positioning role in the installation of the second stop 106.

[0151] In this embodiment, by providing a first baffle 102, thermal runaway gas spreading from the area of ​​the limiting beam 101 to the first gap 31 can be blocked. By providing a heat insulation component 104, thermal runaway gas spreading from the top of the battery cell 20 to the first gap 31 can be blocked. By providing a second baffle 106, thermal runaway gas spreading from above the beam structure 105 to the first gap 31 can be blocked. That is, by the coordinated action of the first baffle 102, the heat insulation component 104, and the second baffle 106, the diffusion path of thermal runaway gas to the first gap 31 is sealed, effectively enhancing the protection effect on the components in the first gap 31.

[0152] In the above technical solution, by setting the second baffle 106 at the end of the beam structure 105 along the second direction Y, and the height of the second baffle 106 is greater than the height of the beam structure 105, the second baffle 106 can play a certain role in blocking the thermal runaway gas in the exhaust channel, and to a certain extent prevent the thermal runaway gas from spreading from the exhaust channel to the second gap 32 and the first gap 31, thereby further improving the problem of component failure in the box caused by thermal runaway of the battery cell 20.

[0153] According to some embodiments of this application, the height of the second stop 106 is greater than or equal to the height of the battery cell 20.

[0154] In other words, the top height of the second stop 106 is greater than or equal to the top height of the battery cell 20.

[0155] This allows the second baffle 106 to better block the exhaust passage at the top of the beam structure 105 in the height direction, thereby further blocking the thermal runaway gas in the exhaust passage and further reducing the probability of the thermal runaway gas spreading to the second gap 32 and the first gap 31 and burning other parts inside the box.

[0156] This application provides an electrical device, which includes the battery device described in the above embodiments, and the battery device is used to provide electrical energy.

[0157] The structure of the battery device and the power supply device can be referred to the relevant description in the above embodiments, and will not be repeated here.

[0158] The technical solution of this application will be further described below with reference to a specific embodiment.

[0159] refer to Figures 2 to 11 The battery device includes: a housing, multiple battery cell groups, a limiting beam 101, and a first stop 102. The housing has a receiving cavity 10; multiple battery cell groups are housed within the receiving cavity 10, each battery cell group including multiple battery cells 20 arranged along a first direction X, and the multiple battery cell groups including a first battery cell group arranged adjacent to the inner wall of the housing along a second direction Y, with a first gap 31 between the first battery cell group and the inner wall of the housing, the first direction X being perpendicular to the second direction Y; the limiting beam 101 is located within the receiving cavity 10, and the limiting beam 101 is located on both sides of the multiple battery cell groups along the first direction X; the first stop 102 is disposed within the first gap 31, and the first stop 102 is connected to the side wall of the battery cell 20 in the first battery cell group adjacent to the limiting beam 101.

[0160] The battery device also includes a heat exchange structure 103 located within the accommodating cavity 10. The heat exchange structure 103 includes a heat exchange tube 1031, which is located at least within a first gap 31 and extends along a first direction X within the first gap 31. A first baffle 102 is located above at least a portion of the heat exchange tube 1031.

[0161] The first baffle 102 crosses the heat exchange tube 1031 along the second direction Y.

[0162] The first stop 102 has a first wall portion 1021 and a second wall portion 1022 disposed opposite to each other along the first direction X. The first wall portion 1021 is closer to the limiting beam 101 than the second wall portion 1022. The heat exchange structure 103 further includes a heat exchange plate 1032 and a current collector 1033. The heat exchange plate 1032 is located between two adjacent battery cells 20 along the first direction X. The current collector 1033 is used to connect the heat exchange channel of the heat exchange plate 1032 and the heat exchange channel of the heat exchange tube 1031. The current collector 1033 is disposed protruding from the outer periphery of the heat exchange tube 1031. The first wall portion 1021 is adjacent to the current collector 1033 disposed near the limiting beam 101. On a projection plane parallel to the second direction Y, the orthographic projection of the first wall portion 1021 and the orthographic projection of the current collector 1033 partially overlap.

[0163] The first baffle 102 has a cavity inside, and the cavity has an opening facing the heat exchange tube 1031, with at least a portion of the current collector 1033 extending into the cavity.

[0164] For example, the first stop 102 may also have a reinforcing rib located in the cavity to divide the cavity into a plurality of sub-cavities arranged along the first direction X.

[0165] The battery device further includes a heat insulation member 104 located within the accommodating cavity 10, which covers at least a portion of the heat exchange tube 1031. The heat insulation member 104 may include a first heat insulation portion 1041 and a second heat insulation portion 1042, which are connected to each other. The first heat insulation portion 1041 may be located above the heat exchange tube 1031, and the second heat insulation portion 1042 is bent relative to the first heat insulation portion 1041 and may be located on the side of the heat exchange tube 1031 facing away from the first battery cell group. Exemplarily, the cross-sectional shape of the heat insulation member 104 along a direction perpendicular to the first direction X may be "L"-shaped. The heat insulation member 104 may be provided corresponding to each of the two outermost rows of first battery cell groups. That is, in the two outermost rows of first battery cell groups, each first battery cell group is provided with a corresponding heat insulation member 104, which is used to cover the heat exchange tube 1031 on one side of the corresponding first battery cell group. The first heat insulation part 1041 can be connected to the shoulder of the battery cell 20. The heat insulation member 104 can also cover the first baffle 102. Exemplarily, the heat insulation member 104 can include, but is not limited to, mica paper, heat insulation pad, etc.

[0166] The first stop 102 has a third wall portion 1023 on one side along the second direction Y, and the third wall portion 1023 is connected to the side wall of the battery cell 20; wherein, there is a gap between the heat exchange tube 1031 located in the first gap 31 and the side wall of the battery cell 20, and on the projection plane parallel to the first direction X, the orthographic projection of the third wall portion 1023 and the orthographic projection of the heat exchange tube 1031 located in the first gap 31 at least partially coincide.

[0167] The first stop 102 is bonded to the side wall of the battery cell 20.

[0168] The battery assembly further includes a beam structure 105 and a second stop 106. The beam structure 105 is located within the receiving cavity 10 and extends along a second direction Y to divide the receiving cavity 10 into multiple sub-receiving cavities. Each sub-receiving cavity is used to accommodate a battery cell assembly. The height of the beam structure 105 is lower than the height of the battery cell 20, and along the second direction Y, the beam structure 105 has a second gap 32 communicating with the inner wall of the housing, which is connected to a first gap 31. The second stop 106 is located at the end of the beam structure 105 along the second direction Y and is at least partially located within the second gap 32. The height of the second stop 106 is greater than the height of the beam structure 105. The beam structure 105 may include a movable beam and a crossbeam, which are spaced apart along a first direction X to divide the receiving cavity 10 into multiple sub-receiving cavities spaced apart along the first direction X. The second stop 106 is located at both ends of the moving beam along the second direction Y and at both ends of the crossbeam along the second direction Y, that is, there can be four second stop 106. The second stop 106 is bolted or riveted to the beam structure 105.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: The enclosure has a receiving cavity; At least one battery cell group is housed within the accommodating cavity. Each battery cell group includes a plurality of battery cells arranged along a first direction. The at least one battery cell group includes a first battery cell group arranged adjacent to the inner wall of the housing along a second direction. The first battery cell group has a first gap with the inner wall of the housing. The first direction is perpendicular to the second direction. A limiting beam is located within the accommodating cavity, and the limiting beam is located on at least one side of the at least one battery cell group along the first direction; A first stop is disposed within the first gap, and the first stop is connected to the side wall of the battery cell adjacent to the limiting beam in the first battery cell group.

2. The battery device according to claim 1, characterized by The battery device also includes: A heat exchange structure is located within the accommodating cavity. The heat exchange structure includes a heat exchange tube, which is at least located within the first gap and extends along the first direction within the first gap. The first baffle is located above at least a portion of the heat exchange tube.

3. The battery device of claim 2, wherein The first baffle spans the heat exchange tube along the second direction.

4. The battery device of claim 2, wherein The first stop has a first wall portion and a second wall portion disposed opposite to each other along the first direction, the first wall portion being closer to the limiting beam than the second wall portion, and the heat exchange structure further includes: A heat exchange plate is located between two adjacent battery cells along the first direction; A heat exchanger is used to connect the heat exchange channels of the heat exchange plate and the heat exchange channels of the heat exchange tube, and the heat exchanger protrudes from the outer periphery of the heat exchange tube; wherein, The first wall portion is adjacent to the current collector disposed near the limiting beam, and on a projection plane parallel to the second direction, the orthographic projection of the first wall portion overlaps with the orthographic projection of the current collector.

5. The battery device of claim 4, wherein, On a projection plane parallel to the second direction, the overlapping portion of the orthographic projection of the first wall portion and the orthographic projection of the current collector is denoted as the overlapping area. Along the second direction, the width of the overlapping area is greater than or equal to the width of the heat exchange tube.

6. The battery device of claim 5, wherein The first baffle has a cavity inside, the cavity having an opening facing the heat exchange tube, and at least a portion of the current collector extends into the cavity.

7. The battery device of claim 6, wherein The first stop also has a reinforcing rib located within the cavity to divide the cavity into multiple sub-cavities arranged along the first direction.

8. The battery device of claim 2, wherein The battery device also includes: A heat insulation element is located within the accommodating cavity, and the heat insulation element covers at least a portion of the heat exchange tube.

9. The battery device of claim 2, wherein, The first stop member has a third wall portion on one side along the second direction, and the third wall portion is connected to the side wall of the battery cell; wherein, There is a gap between the heat exchange tube located within the first gap and the sidewall of the battery cell. On a projection plane parallel to the first direction, the orthographic projection of the third wall portion at least partially coincides with the orthographic projection of the heat exchange tube located within the first gap.

10. The battery device according to any one of claims 1-9, wherein, The first stop is bonded to the side wall of the battery cell.

11. The battery device according to any one of claims 1 to 9, wherein The first stop also extends to be configured corresponding to the limiting beam.

12. The battery device of any one of claims 1-9, wherein, The battery device also includes: At least one beam structure is located within the accommodating cavity, the beam structure extends along the second direction to divide the accommodating cavity into a plurality of sub-accommodating cavities, each of the sub-accommodating cavities being used to accommodate the battery cell assembly, the height of the beam structure being lower than the height of the battery cell, and along the second direction, the beam structure having a second gap communicating with the inner wall of the housing and the first gap; The second stop is located at the end of the beam structure along the second direction and is at least partially located within the second gap, and the height of the second stop is greater than the height of the beam structure.

13. The battery device of claim 12, wherein, The height of the second stop is greater than or equal to the height of the battery cell.

14. An electrical device, characterized by The electrical device includes the battery device according to any one of claims 1-13, the battery device being used to provide electrical energy.

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