Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body, a battery monomer and a heat insulation plate, and the box body comprises at least one edge beam; the battery monomers are accommodated in the box body; the heat insulation plate is arranged between the edge beam and the battery monomer, a hollow section is formed in the heat insulation plate, the heat insulation plate is provided with a bulge structure facing the edge beam and / or the battery monomer, and the bulge structure is propped against the edge beam or the battery monomer which the bulge structure faces. By additionally arranging the bulge structures towards the edge beams and / or the battery monomers on the heat insulation plates, the contact area between the heat insulation plates and the edge beams and / or between the heat insulation plates and the battery monomers is reduced, so that the heat exchange efficiency between the heat insulation plates and the edge beams and / or between the heat insulation plates and the battery monomers is reduced, and the heat transfer between the battery monomers and the box body is reduced and slowed down; and the heat insulation effect is improved, so that the heat management capability of the battery device in an extreme temperature environment is enhanced.

Description

Technical Field

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

[0002] To reduce the impact of extreme temperatures on internal thermal management in battery devices, thermal insulation panels are typically placed between the battery cells and the housing they house. However, the large surfaces of the thermal insulation panels are in pressure contact with the battery cells and the housing, respectively. In actual use, the thermal insulation panels conduct heat rapidly between the battery cells and the housing, resulting in poor insulation effectiveness. Utility Model Content

[0003] The present application provides a battery device and an electrical device, and is at least used to improve the thermal management efficiency of the battery device.

[0004] In a first aspect, the present application provides a battery device, which includes a box body, a battery cell and a heat insulation board, wherein: the box body includes at least one side beam; the battery cell is accommodated in the box body; the heat insulation board is arranged between the side beam and the battery cell, a hollow area is formed inside the heat insulation board, the heat insulation board has a protruding structure toward the side beam and / or the battery cell, and the protruding structure abuts against the side beam or battery cell it faces.

[0005] The battery device in the embodiment of the present application reduces the contact area between the thermal insulation plate and the side beam and / or the thermal insulation plate and the battery cell by adding a protruding structure toward the side beam and / or the battery cell on the thermal insulation plate, thereby reducing the heat exchange efficiency between the thermal insulation plate and the side beam and / or the thermal insulation plate and the battery cell, thereby reducing and slowing down the heat transfer between the battery cell and the box body, improving the thermal insulation effect, and further facilitating the enhancement of the thermal management capability of the battery device in extreme temperature environments.

[0006] In some embodiments, the thermal insulation plate includes a first partition and a second partition that are opposite and spaced apart along the thickness direction of the thermal insulation plate, and the interval between the first partition and the second partition that are opposite and spaced apart forms a hollow interval, the first partition faces the side beam, and the second partition faces the battery cell, and the protrusion structure includes a first protrusion facing the side beam, and the first protrusion is formed on the first partition and abuts against the side beam.

[0007] In this way, the relative and spaced intervals between the first partition and the second partition form a hollow interval, the first partition faces the side beam, and the second partition faces the battery cell, so that the hollow interval is used to block or slow down the heat exchange between the side beam and the battery cell. The first protrusion on the first partition abuts against the side beam, reducing the contact area between the insulation board and the box body, thereby reducing the heat exchange efficiency between the insulation board and the box body, improving the insulation effect, and thus helping to enhance the thermal management capability of the battery device in extreme temperature environments.

[0008] In some embodiments, the surface of the second separator facing the battery cell is flat and in contact with the battery cell.

[0009] In this way, the first partition faces the side beam, and a first protrusion is formed on the first partition to abut the side beam. The second partition faces the battery cell and the flat surface of the second partition is in contact with the battery cell, thereby reducing the contact area between the insulation board and the box body, enhancing the thermal insulation performance, and forming a more uniform surface pressure on the contact surface between the battery cell and the insulation board.

[0010] In some embodiments, a heat exchange plate is provided on a side of the battery cell facing the side beam, and a surface of the second separator facing the battery cell is a flat surface and is in contact with the heat exchange plate.

[0011] In this way, the first partition faces the side beam, and a first protrusion is formed on the first partition to abut the side beam. The second partition faces the battery cell and the flat surface of the second partition is in contact with the heat exchange plate, thereby reducing the contact area between the insulation plate and the box body, reducing the interference of the external environment on the temperature regulation function of the heat exchange plate, and a relatively uniform surface pressure can be formed between the battery cell and the heat exchange plate, and between the heat exchange plate and the insulation plate.

[0012] In some embodiments, the protrusion structure further includes a second protrusion facing the battery cell, wherein the second protrusion is formed on the second separator and abuts against the battery cell.

[0013] In this way, the second protrusion abuts the battery cell, reducing the contact area between the insulation board and the battery cell, thereby further reducing and slowing down the heat transfer between the battery cell and the box body, improving the insulation effect of the insulation board, and further helping to enhance the thermal management capability of the battery device in extreme temperature environments.

[0014] In some embodiments, a heat exchange plate is provided on a side of the battery cell facing the side beam, and the protrusion structure further includes a second protrusion facing the battery cell, the second protrusion is formed on the second separator and abuts against the heat exchange plate.

[0015] In this way, the second protrusion abuts the heat exchange plate, reducing the contact area between the heat insulation plate and the heat exchange plate, reducing the heat exchange between the battery cell and the box, and improving the insulation effect of the heat insulation plate, which is beneficial to reducing the impact of the external environment when the heat exchange plate regulates the temperature of the battery cell.

[0016] In some embodiments, the thermal insulation plate includes a first partition and a second partition that are opposite and spaced apart along the thickness direction of the thermal insulation plate, and the interval between the first partition and the second partition that are opposite and spaced apart forms a hollow interval, the first partition faces the side beam, and the second partition faces the battery cell, and the protrusion structure includes a second protrusion facing the battery cell, and the second protrusion is formed on the second partition.

[0017] In this way, the second protrusion on the second partition abuts against the battery cell, reducing the contact area between the insulation plate and the battery cell, thereby reducing the heat exchange efficiency between the insulation plate and the battery cell, thereby reducing and slowing down the heat transfer between the battery cell and the box, and improving the insulation effect.

[0018] In some embodiments, the surface of the first partition facing the side beam is a flat surface and fits the side beam, and the second protrusion abuts the battery cell; in other embodiments, the surface of the first partition facing the side beam is a flat surface and fits the side beam, a heat exchange plate is provided on the side of the battery cell facing the side beam, and the second protrusion abuts the heat exchange plate.

[0019] In this way, the second protrusion on the second partition is in contact with the battery cell or the heat exchange plate, thereby reducing the contact area between the heat insulation plate and the battery cell or the heat exchange plate, thereby reducing the heat exchange efficiency between the heat insulation plate and the battery cell, and also reducing the interference of the external environment on the temperature regulation function of the heat exchange plate, thereby enhancing the thermal management capability of the battery device in extreme temperature environments, and the pressure distribution between the box and the heat insulation plate is more uniform.

[0020] In some embodiments, the thermal insulation board further includes a supporting portion, which is located in the hollow space and connects the first separator and the second separator.

[0021] In this way, the first partition plate and the second partition plate are connected in the hollow space by the support portion, thereby reducing the overall thermal conductivity of the heat insulation board while obtaining sufficient support strength.

[0022] In some embodiments, the protrusion structure includes a first protrusion facing the side beam and a second protrusion facing the battery cell, and the first protrusion, the support portion, and the second protrusion are aligned along the thickness direction of the heat insulation board.

[0023] In this way, the first protrusion, the support portion and the second protrusion are aligned along the thickness direction of the heat insulation board, thereby increasing the compressive strength of the heat insulation board, which is beneficial for the side beams and the heat insulation board to restrain the expansion of the battery cells.

[0024] In some embodiments, the first protrusion extends along the length direction of the thermal insulation board and extends from one end to the other end of the first insulation board in the length direction.

[0025] In this way, the first protrusion extends along the length direction of the insulation board and extends from the first end to the other end of the length direction of the first partition board. Therefore, when the first protrusion abuts against the side beam and is compressed, the force along the length direction of the insulation board is relatively uniform, which is conducive to structural stability.

[0026] In some embodiments, there are multiple first protrusions, and the multiple first protrusions are arranged at intervals along the width direction of the thermal insulation board.

[0027] In this way, the plurality of first protrusions are arranged at intervals along the width direction of the heat insulation board, which is conducive to dispersing stress, so that the heat insulation board has sufficient supporting strength between the battery cells and the side beams.

[0028] In some embodiments, the plurality of first protrusions are arranged at equal intervals along the width direction of the thermal insulation board.

[0029] In this way, by arranging the plurality of first protrusions at equal intervals along the width direction of the heat insulation board, the stress distribution is further uniformed, the supporting strength of the heat insulation board is increased, and it is beneficial to maintain the stability of the internal structure of the battery device.

[0030] In some embodiments, the battery cell includes two first walls opposite to each other along a first direction, the area of ​​the first wall is larger than the area of ​​other walls of the battery cell, and the first wall faces the heat insulation board and abuts against the heat insulation board.

[0031] In this way, when the battery cell expands during use, the expansion degree of the first wall is more obvious than that of other walls. The first wall abuts against the insulation board, so that the side beams and the insulation board restrain the expansion of the battery cell, avoiding to a certain extent the cracking of the first wall due to excessive expansion, thereby improving the safety of the battery device.

[0032] There are multiple battery cells, which are arranged along a first direction to form a battery column. There are two side beams, which are respectively arranged at both ends of the battery column along the first direction. A heat insulation plate is provided between each side beam and the first wall of the adjacent battery cell.

[0033] In this way, side beams are provided at both ends of the battery column along the first direction, and heat insulation plates are provided between the side beams and the first walls of adjacent battery cells, so that the side beams and the heat insulation plates have a certain restraining effect on the battery cells, which can to a certain extent prevent the first wall from cracking due to excessive expansion, thereby improving the safety of the battery device.

[0034] In a second aspect, the present application provides an electrical device, which includes a battery device according to any of the above embodiments, and the battery device is used to provide electrical energy.

[0035] The electric device according to the embodiment of the present application includes the battery device according to the above embodiment, and thus has all the beneficial effects of the battery device provided by the embodiment of the present application.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0038] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0039] Figure 2 Schematic diagram of the exploded structure of a battery device according to some embodiments of the present application;

[0040] Figure 3 This is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0041] Figure 4 This is a schematic structural diagram of a heat insulation board according to some embodiments of the present application;

[0042] Figure 5 for Figure 4 A partial enlarged schematic diagram of the heat insulation board;

[0043] Figure 6 for Figure 4 A schematic structural diagram of the heat insulation board from a left perspective;

[0044] Figure 7 It is an enlarged schematic diagram of the heat insulation board of some other embodiments of the present application;

[0045] Figure 8 for Figure 7 Schematic diagram of the structure of the heat insulation board from the left perspective.

[0046] Description of main component symbols:

[0047] Vehicle 1000, motor 300, controller 400, battery device 100, housing 10, first part 11, second part 12, first expansion beam 13, second expansion beam 14, accommodating cavity 15, cross beam 16, longitudinal beam 17, side beam 18, battery cell 20, end cover 21, electrode terminal 21a, shell 22, electrode assembly 23, tab 23a, first wall 24, battery array 25, heat insulation board 30, hollow space 31, support portion 311, first protrusion 32, first partition 33, second partition 34, second protrusion 35, protrusion structure 36. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0051] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0056] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0057] Battery thermal management has a significant impact on improving battery performance. However, because the battery case and internal load-bearing structures are mostly made of metal, these highly thermally conductive metal components are directly connected to the battery module, allowing direct heat exchange between the external environment and the thermal management module within the battery, thereby affecting the battery's own thermal management capabilities. This impact is particularly noticeable in extremely high or low temperature environments.

[0058] In order to reduce the impact of external ambient temperature on the thermal management efficiency of the battery, an insulation board is usually provided between the battery box and the battery module to block the heat transfer between the box and the battery module.

[0059] In related technologies, the heat insulation plate is designed as a structure with two-sided planes, and the large surfaces on both sides are in pressure contact with the battery cells (or heat exchange plates) and the box body respectively, which conducts heat quickly and the actual heat insulation effect of the heat insulation plate is poor.

[0060] In view of the above problems, by adding a protruding structure on at least one of the two sides of the insulation board facing the box or battery cell, the contact area between the insulation board and the opponent is reduced, thereby improving the insulation effect of the insulation board, reducing the heat exchange between the box and the battery cell, and further reducing the impact of the external ambient temperature on the battery thermal management efficiency.

[0061] Battery devices can be used as power sources for electrical devices or various energy storage systems that use battery devices as energy storage elements. Electrical devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, and the like. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft.

[0062] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0063] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0064] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0065] Please refer to Figures 2 to 3 , Figure 2 This is a schematic structural diagram of a battery device 100 provided in some embodiments of the present application. Figure 3Schematic diagram of the exploded structure of the battery device 100 provided for some embodiments of the present application. The battery device 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide a storage cavity 15 for the battery cell 20, and the case 10 can adopt a variety of structures. In some embodiments, the case 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage cavity 15 for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define the storage cavity 15; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0066] In the battery device 100, there may be multiple battery cells 20, which may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit 20 may be housed within the housing 10. Alternatively, the battery device 100 may comprise multiple battery cells 20 connected in series, in parallel, or in a hybrid connection to form a battery module, which is then further connected in series, in parallel, or in a hybrid connection to form a single unit and housed within the housing 10. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0067] Each battery cell 20 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0068] Please refer to Figure 3 , Figure 3 The following is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery device. Figure 3 The battery cell 20 includes an end cap 21, a shell 22, an electrode assembly 23 and other functional components.

[0069] The end cap 21 is a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as an aluminum alloy). This prevents the end cap 21 from deforming when subjected to compression or collision, thereby providing the battery cell 20 with greater structural strength and improved safety. The end cap 21 can be provided with functional components such as electrode terminals 21a. The electrode terminals 21a can be used to electrically connect to the electrode assembly 23 for inputting or outputting electrical energy from the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 21 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this.

[0070] The housing 22 is a component that cooperates with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can be used to accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and end cap 21 can be separate components. An opening can be provided in the housing 22, and the end cap 21 is placed over the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and housing 22 can be integrated. Specifically, the end cap 21 and housing 22 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 22 needs to be enclosed, the end cap 21 is placed over the housing 22. The housing 22 can have a variety of shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, or a hexagonal prism. Specifically, the shape of the housing 22 can be determined based on the specific shape and size of the electrode assembly 23. The housing 22 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this.

[0071] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be contained in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 23, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery device, the positive active material and the negative active material react with the electrolyte, and the tab 23a is connected to the electrode terminal 21a to form a current loop.

[0072] According to some embodiments of the present application, referring to Figure 2, and please refer to Figure 2 and Figure 4 The battery device 100 of the embodiment of the present application includes a box body 10, a battery cell 20 and a heat insulation board 30, wherein: the box body 10 includes at least one side beam 18; the battery cell 20 is accommodated in the box body 10; the heat insulation board 30 is arranged between the side beam 18 and the battery cell 20, and a hollow space 31 is formed inside the heat insulation board 30. The heat insulation board 30 has a protruding structure 36 formed toward the side beam 18 and / or the battery cell 20, and the protruding structure 36 abuts against the side beam 18 or the battery cell 20 it faces.

[0073] Specifically, the side beams 18 can be expansion beams disposed within the second portion 12. The longitudinal ends of the side beams 18 are connected to the inner walls of the second portion 12, thereby separating the accommodating cavity 15 into a battery compartment and an electrical compartment. The battery compartment is used to accommodate the battery cells 20, and the electrical compartment is used to accommodate components such as the battery management system. Alternatively, the side beams 18 can be a portion of the second portion 12. For example, the second portion 12 can include multiple side beams connected end-to-end to form a frame structure, with the first portion 11 covering the opening of the frame structure. The thermal insulation board 30 can be square in shape, with its length-to-width ratio matching the shape of the housing 10. For example, the housing 10 can be flat, the side beams 18 can be thick strips, and the thermal insulation board 30 can be a rectangular thin plate. The thermal insulation board 30 can be positioned sideways between the side beams 18 and the battery cells 20, with its thickness parallel to the direction in which the side beams 18 and the battery cells 20 face each other, and its width parallel to the height of the housing 10.

[0074] like Figure 2 and Figure 4 As shown in the figure, the X direction is the direction relative to the side beam 18 and the battery cell 20, the Z direction is the height direction of the box body 10, and the Y direction, X direction, and Z direction are perpendicular to each other. In some embodiments, the X direction is also the thickness direction of the insulation board 30, the Y direction is also the length direction of the insulation board 30, and the Z direction is also the width direction of the insulation board 30.

[0075] The raised structure 36 can be a strip-shaped, block-shaped, column-shaped structure, or other shaped structures. For example, the raised structure 36 can be a rib. In another example, the raised structure 36 can be a bump. The raised structure 36 protrudes from the surface of the heat insulation board 30 along the X direction. The top of the raised structure 36 away from the surface of the heat insulation board 30 can form a narrow end face. Compared with the surface of the heat insulation board 30 directly contacting the side beam 18 or the battery cell 20, the end face of the raised structure 36 abuts the side beam 18 or the battery cell 20, which greatly reduces the contact area between the heat insulation board 30 and the side beam 18, and the heat insulation board 30 and the battery cell 20. In addition, a hollow space 31 is formed inside the heat insulation board 30. The hollow space 31 can form an air layer. The raised structure 36 forms another air layer between the heat insulation board 30 and the side beam 18 or the battery cell 20, thereby improving the heat insulation capacity of the heat insulation board 30.

[0076] Optionally, the end surface of the protruding structure 36 is perpendicular to the X direction, so that the heat shield 30 and the protruding structure 36 are structurally more stable when compressed between the battery cell 20 and the side beam 18 .

[0077] Optionally, refer to Figures 4 to 6 The heat shield 30 has a first protrusion 32 formed toward the side beam 18 , and a flat surface on the side facing the battery cell 20 . The first protrusion 32 abuts against the side beam 18 . In this embodiment, the first protrusion 32 is a protrusion structure 36 .

[0078] Optionally, refer to Figure 7 and Figure 8 The heat shield 30 has a first protrusion 32 formed toward the side beam 18 and a second protrusion 33 formed toward the battery cell 20. The first protrusion 32 abuts against the side beam 18, and the second protrusion 33 abuts against the battery cell 20. In this embodiment, the protrusion structure 36 includes the first protrusion 32 and the second protrusion 33.

[0079] Optionally, the side of the heat shield 30 facing the side beam 18 is a flat surface, and a second protrusion 33 is formed facing the battery cell 20 , and the second protrusion 33 abuts against the battery cell 20 . In this embodiment, the second protrusion 33 is a protrusion structure 36 .

[0080] Optionally, the second protrusion 33 may directly abut against the battery cell 20 , or may abut against a heat management component such as a heat exchange plate (not shown) provided on the battery cell 20 .

[0081] Optionally, the heat insulation board 30 is made of a material with a low thermal conductivity, for example, the heat insulation board 30 is made of plastic.

[0082] The battery device 100 of the embodiment of the present application reduces the contact area between the thermal insulation plate 30 and the side beam 18 and / or the thermal insulation plate 30 and the battery cell 20 by adding a protruding structure 36 toward the side beam 18 and / or the battery cell 20 on the thermal insulation plate 30, thereby reducing the heat exchange efficiency between the thermal insulation plate 30 and the box body 10 and / or the thermal insulation plate 30 and the battery cell 20, thereby reducing and slowing down the heat transfer between the battery cell 20 and the box body 10, improving the thermal insulation effect, and further facilitating the enhancement of the thermal management capability of the battery device 100 in extreme temperature environments.

[0083] See also Figure 2 and Figure 3 In some embodiments, the battery cell 20 includes two first walls 24 opposite to each other along a first direction. The area of ​​the first wall 24 is larger than the area of ​​other walls of the battery cell 20 . The first wall 24 faces the heat insulation board 30 and abuts against the heat insulation board 30 .

[0084] Specifically, the direction in which the first wall 24 is opposite to the side beam 18 is the first direction, which is also the direction in which the first wall 24 is opposite to the side beam 18. Figure 2 The X direction is shown. Exemplarily, the housing 22 is in the shape of a cuboid, and the first wall 24 is a wall surface defined by the longest side and the second longest side of the housing 22 .

[0085] Optionally, the first wall 24 directly abuts against the raised structure 36 .

[0086] Optionally, the first wall 24 is in contact with a heat exchange plate (not shown) and abuts against the protruding structure 36 through the heat exchange plate.

[0087] Understandably, battery cells 20 often expand during use, with expansion being more pronounced on the larger first wall. By orienting the first wall toward and abutting the insulation board, the side beams and insulation board restrain the expansion of the battery cells, thereby preventing cracking of the first wall due to excessive expansion and improving the safety of the battery device.

[0088] See also Figure 2 In some embodiments, there are multiple battery cells 20, and the multiple battery cells 20 are arranged along a first direction (the X direction as shown in the figure) to form a battery column 25. Two side beams 18 are provided, and the two side beams 18 are respectively provided at both ends of the battery column 25 along the first direction. A heat insulation board 30 is provided between each side beam 18 and the first wall 24 of the adjacent battery cell 20.

[0089] Specifically, multiple battery cells 20 are accommodated in the accommodating cavity 15, and the battery array 25 is located between the two heat insulation plates 30. The number of battery arrays 25 can be multiple, and the multiple battery arrays 25 can be arranged along the following lines: Figure 2The side beams 18 are arranged on two opposite sides of the box body 10 along the first direction, and the heat insulation board 30 is arranged on one side opposite to the two side beams 18 and respectively abuts against the two side beams 18 .

[0090] With the first direction being the front-to-back direction, the two side beams 18 are respectively arranged at the front and rear sides of the box body 10. The heat shield 30 on the front side abuts the front side beam 18 via the first protrusion 32, and the heat shield 30 on the rear side abuts the rear side beam 18 via the first protrusion 32. In each battery row 25, the front first wall 24 of the frontmost battery cell 20 abuts the front heat shield 30, and the rear first wall 24 of the last battery cell 20 abuts the rear heat shield 30.

[0091] In some embodiments, the thermal shield 30 has a first protrusion 32 formed toward the side beam 18. The first protrusion 32 abuts the side beam, and the first walls 24 of the battery cells 20 located at both ends of the battery column 25 along the first direction, facing the side beam 18, may abut the thermal shield 30. Optionally, the first walls 24 facing the side beam 18 mate with the flat surface of the thermal shield 30. Optionally, the thermal shield 30 has a second protrusion 35 formed toward the battery cells 20, and the first wall 24 abuts the second protrusion 35.

[0092] Specifically, the first protrusion 34 can protrude from the surface of the first partition plate 33 along the thickness direction of the insulation plate 30, and the end of the first protrusion 34 can form a narrow end face, and the end face of the first protrusion 34 abuts against the side beam 18, replacing the solution in which the surface of the insulation plate 30 directly fits with the side beam 18, thereby reducing the contact area between the insulation plate 30 and the side beam 18.

[0093] Optionally, the first protrusion 34 may be in the shape of a strip, a block, a column or other irregular shapes. For example, the first protrusion 34 may be in the shape of a Figure 5 As another example, the first protrusion 34 can be a hemispherical protrusion.

[0094] In this way, the first wall 24 with the largest area in the battery cell 20 faces the heat insulation plate 30, and side beams 18 are provided at both ends of the battery column 25 along the first direction. The heat insulation plate 30 is provided between the side beam 18 and the first wall 24 of the adjacent battery cell 20, so that the side beam 18 and the heat insulation plate 30 have a certain restraining effect on the battery cell 20, which can prevent the first wall 24 from cracking due to excessive expansion to a certain extent, thereby improving the safety of the battery device 100.

[0095] In other embodiments, the battery cell 20 is cylindrical, the side beams 18 can be set on each side of the box body 10 in the circumferential direction, the insulation plate 30 is clamped between each side beam 18 and the circumferential arc surface of the battery cell 20, and the insulation plate 30 is formed with a first protrusion 32 toward the side beam 18, and the first protrusion 32 abuts the side beam 18.

[0096] See also Figures 4 to 6 In some embodiments, the thermal insulation board 30 includes a first partition 33 and a second partition 34 that are opposite and spaced apart along the thickness direction of the thermal insulation board 30. The first partition 33 and the second partition 34 are opposite and spaced apart to form a hollow space 31. The first partition 33 faces the side beam 18, and the second partition 34 faces the battery cell 20. The protrusion structure 36 includes a first protrusion 32 facing the side beam 18. The first protrusion 32 is formed on the first partition 33 and abuts against the side beam 18.

[0097] Optionally, the first partition 33 and the second partition 34 may form an opening at the edge of at least one of the width direction and the length direction, and the hollow space 31 is connected to the outside of the insulation board 30 through the opening, so that air can flow through the hollow space 31 to enhance the insulation capacity.

[0098] Optionally, in some embodiments, the first separator 33 and the second separator 34 are connected by hemming at their edges in the width direction.

[0099] In this way, the first partition 33 and the first partition 34 are opposite and spaced apart to form a hollow space 31, the first partition 33 faces the side beam 18, and the second partition 34 faces the battery cell 20, so that the hollow space 31 is used to block or slow down the heat exchange between the side beam 18 and the battery cell 20, and the first protrusion 32 on the first partition 33 abuts against the side beam 18, thereby reducing the contact area between the insulation board 30 and the box body 10, thereby reducing the heat exchange efficiency between the insulation board 30 and the box body 10, improving the insulation effect, and thus helping to enhance the thermal management capability of the battery device 100 in extreme temperature environments.

[0100] See also Figures 4 to 6 In some embodiments, the thermal insulation board 30 further includes a support portion 311 and a first partition plate 33 and a second partition plate 34 that are opposite and spaced apart along the thickness direction of the thermal insulation board 30. The interval between the first partition plate 33 and the second partition plate 34 that are opposite and spaced apart forms a hollow interval 31. The support portion 311 is located in the hollow interval 31 and connects the first partition plate 33 and the second partition plate 34.

[0101] Specifically, the height of the support portion 311 is the same as the distance between the first and second partitions 33, 34. The support portion 311 is connected to the first and second partitions 33, 34 on either side of the insulation board 30 in the thickness direction. The support portion 311 can be integrally connected to each of the first and second partitions 33, 34. The first and second partitions 33, 34 can be aligned in the thickness direction (the X direction as shown in the figure). The side length and thickness of the first partition 33 can be equal to or similar to the corresponding dimensions of the second partition 34 to facilitate molding.

[0102] Optionally, there are multiple support portions 311, and the multiple support portions 311 are arranged at intervals in the hollow space 31. Furthermore, the multiple support portions 311 can be arranged along the width direction or the length direction of the insulation board 30, and the distance between two adjacent support portions 311 is equal.

[0103] In this way, the first partition plate 33 and the second partition plate 34 are opposite and spaced apart to form a hollow space 31, and the support portion 311 simultaneously connects the first partition plate 33 and the second partition plate 34 in the hollow space 31, thereby reducing the overall thermal conductivity of the insulation board 30 while obtaining sufficient support strength.

[0104] See also Figure 5 , combined with Figure 2 In some embodiments, the first separator 33 faces the side beam 18 , and the second separator 34 faces the battery cell 20 . The surface of the second separator 34 facing the battery cell 20 is a flat surface and fits the battery cell 20 .

[0105] Specifically, the heat shield 30 stands sideways between the side beam 18 and the battery cell 20. The second separator 34 and the opposing side surfaces of the second separator 34 face the hollow space 31. The surface of the first separator 33 opposite the second separator 34 faces the side beam 18 and is formed with a first protrusion 32. The surface of the second separator 34 opposite the first separator 33 faces the battery cell 20. The surface of the second separator 34 facing the battery cell 20 is flat and conforms to the battery cell 20. If the battery cell 20 expands or has a tendency to expand, the pressure exerted by the battery cell 20 on the second separator 34 will be uneven in different areas. The flat pressure-bearing surface of the second separator 34 facilitates uniform stress and maintains structural stability.

[0106] Optionally, the second partition plate 34 is a straight plate, and both side surfaces of the second partition plate 34 in the thickness direction are flat surfaces.

[0107] In this way, the first partition 33 faces the side beam 18, and a first protrusion 32 is formed on the first partition 33 to abut the side beam 18. The second partition 34 faces the battery cell 20 and the flat surface of the second partition 34 is in contact with the battery cell 20, thereby reducing the contact area between the insulation board 30 and the box body 10 and enhancing the thermal insulation performance. At the same time, the contact surface between the battery cell 20 and the insulation board 30 can form a relatively uniform surface pressure.

[0108] In some embodiments, a heat exchange plate is provided on the side of the battery cell 20 facing the side beam 18, the first partition 33 faces the side beam 18, and the second partition 34 faces the battery cell 20. The surface of the second partition 34 facing the battery cell 20 is a flat surface and is in contact with the heat exchange plate.

[0109] Specifically, the heat exchange plate is a flat plate-like structure that fits against the battery cells 20. A heat exchange flow path can be formed within the heat exchange plate. A heat exchange medium flows through the area where the heat exchange plate fits against the battery cells 20, exchanging heat with the battery cells 20 and regulating the temperature of the battery cells 20. The surface of the heat exchange plate facing away from the battery cells 20 can abut against the heat insulation plate 30. Furthermore, the heat exchange plate fits against the flat surface of the second separator 34 to facilitate even pressure distribution.

[0110] In this way, the first partition 33 faces the side beam 18, and a first protrusion 32 is formed on the first partition 33 to abut the side beam 18. The second partition 34 faces the battery cell 20 and the flat surface of the second partition 34 is in contact with the heat exchange plate, thereby reducing the contact area between the heat insulation plate 30 and the box body 10, reducing the interference of the external environment on the temperature regulation function of the heat exchange plate, and a relatively uniform surface pressure can be formed between the battery cell 20 and the heat exchange plate, and between the heat exchange plate and the heat insulation plate 30.

[0111] See also Figure 2 、 Figure 4 and Figure 5 In some embodiments, the thermal insulation board 30 includes a first partition 33 and a second partition 34 that are opposite and spaced apart along the thickness direction of the thermal insulation board 30 , and the interval between the first partition 33 and the second partition 34 that are opposite and spaced apart forms a hollow interval 31 , the first partition 33 faces the side beam 18 , and the second partition 34 faces the battery cell 20 , and the protrusion structure 36 includes a second protrusion 35 facing the battery cell 20 , and the second protrusion 35 is formed on the second partition 34 .

[0112] Specifically, the second protrusion 35 can protrude from the surface of the second partition plate 34 along the thickness direction of the heat insulation plate 30, and the end of the second protrusion 35 can form a narrow end face, and the end face of the second protrusion 35 abuts against the battery cell 20, replacing the solution in which the surface of the heat insulation plate 30 is directly attached to the battery cell 20, thereby reducing the contact area between the heat insulation plate 30 and the battery cell 20.

[0113] Optionally, the second protrusion 35 may be in the shape of a strip, a block, a column or other irregular shapes. For example, the second protrusion 35 may be in the shape of a Figure 7 As another example, the second protrusion 35 can be a hemispherical protrusion.

[0114] Optionally, the first partition plate 33 is formed with a first protrusion 32 toward the side beam 18 , and the first protrusion 32 and the second protrusion 35 can be of the same shape for ease of molding. In other embodiments, the second protrusion 35 can also be of a different shape from the first protrusion 32 .

[0115] Optionally, the second protrusion 35 abuts against a side wall of the battery cell 20 with the largest area.

[0116] In this way, the second protrusion 35 abuts against the battery cell 20, reducing the contact area between the heat insulation plate 30 and the battery cell 20, thereby reducing and slowing down the heat transfer between the battery cell 20 and the box body 10, improving the heat insulation effect of the heat insulation plate 30, and further helping to enhance the thermal management capability of the battery device 100 in extreme temperature environments.

[0117] In some embodiments, a heat exchange plate (not shown) is provided on the side of the battery cell 20 facing the side beam 18 , and a second protrusion 35 is formed on the side of the heat insulation plate 30 facing the battery cell 20 , and the second protrusion 35 abuts against the heat exchange plate.

[0118] Specifically, the heat exchange plate can be fitted with a first wall 24 of the battery cell 20 that is closest to the side beam 18. The side of the heat exchange plate facing away from the battery cell 20 abuts against the end face of the second protrusion 35. The second protrusion 35 can protrude from the second partition 34 along the X direction toward the battery cell 20, that is, toward the side surface of the heat exchange plate. The end face of the second protrusion 35 away from the second partition 34 can be perpendicular to the X direction to facilitate increasing the pressure resistance. The end face of the second protrusion 35 contacts the heat exchange plate, which greatly reduces the contact area between the heat insulation plate 30 and the heat exchange plate compared to when one side surface of the heat insulation plate 30 is completely in contact with the heat exchange plate.

[0119] In this way, the second protrusion 35 abuts against the heat exchange plate, reducing the contact area between the heat insulation plate 30 and the heat exchange plate, reducing the heat exchange between the battery cell 20 and the box body 10, and improving the heat insulation effect of the heat insulation plate 30, which is beneficial to reducing the impact of the external environment when the heat exchange plate regulates the temperature of the battery cell 20.

[0120] When the battery device 100 cools the battery cells 20 through the heat exchange plate, the heat insulation plate 30 can effectively block the cooling of the box 10 by the heat exchange plate, thereby increasing the cooling rate of the battery cells 20 .

[0121] In some embodiments, the surface of the first partition 33 facing the side beam 18 is a flat surface and is in contact with the side beam 18, and the second protrusion 35 abuts against the battery cell 20; in other embodiments, the surface of the first partition 33 facing the side beam 18 is a flat surface and is in contact with the side beam 18, a heat exchange plate is provided on the side of the battery cell 20 facing the side beam 18, and the second protrusion 35 abuts against the heat exchange plate.

[0122] Specifically, both the first and second separators 33 and 34 can be flat plates. The first separator 33 lacks the protrusion 36 . The heat shield 30 is in contact with the side beam 18 via the first separator 33 . The second separator 34 forms a second protrusion 35 facing the battery cell 20 . The end of the second protrusion 35 abuts the battery cell 20 , either forming a point contact or reducing the contact surface. In this embodiment, the second protrusion 35 serves as the protrusion 36 .

[0123] In this way, the second protrusion 35 on the second partition plate 34 abuts against the battery cell 20 or the heat exchange plate, thereby reducing the contact area between the heat insulation plate 30 and the battery cell or the heat exchange plate, thereby reducing the heat exchange efficiency between the heat insulation plate 30 and the battery cell 20, and also reducing the interference of the external environment on the temperature regulation function of the heat exchange plate, thereby enhancing the thermal management capability of the battery device 100 in extreme temperature environments, and the pressure distribution between the box body 10 and the heat insulation plate 30 is more uniform.

[0124] See also Figure 7 and Figure 8 In some embodiments, the protrusion structure 36 includes a first protrusion 32 toward the side beam 18 and a second protrusion 35 toward the battery cell 20 . The first protrusion 32 , the support portion 311 , and the second protrusion 35 are aligned along the thickness direction of the heat shield 30 .

[0125] Specifically, the first protrusion 32, the support portion 311 and the second protrusion 35 are aligned along the thickness direction of the insulation board 30, the root of the first protrusion 32 and the support portion 311 are connected to both sides of the same position of the first partition 33, the root of the second protrusion 35 and the support portion 311 are connected to both sides of the same position of the second partition 34, and the first protrusion 32, the support portion 311 and the second protrusion 35 are all vertically arranged along the thickness direction of the insulation board 30.

[0126] When the battery cells 20 expand or tend to expand, the side beams 18 apply pressure to the end faces of the first protrusions 32, and the battery cells 20 apply pressure to the end faces of the second protrusions 35. This pressure is directed parallel to the direction in which the side beams 18 and battery cells 20 face each other, i.e., the thickness of the thermal insulation board 30. Therefore, the first protrusions 32, support portions 311, and second protrusions 35 are aligned along the thickness of the thermal insulation board 30, increasing the thickness of the thermal insulation board 30 that is locally compressed and improving its compressive resistance.

[0127] Optionally, the heights of the first protrusion 32 , the supporting portion 311 and the second protrusion 35 are respectively larger than their own widths or thicknesses, forming a relatively short structure, which is beneficial to increasing the pressure resistance.

[0128] In this way, the first protrusion 32 , the support portion 311 and the second protrusion 35 are aligned along the thickness direction of the heat insulation board 30 , thereby increasing the compressive strength of the heat insulation board 30 , which helps the side beam 18 and the heat insulation board 30 to restrain the expansion of the battery cell 20 .

[0129] See also Figure 4 and Figure 5In some embodiments, the thermal insulation board 30 includes a first partition 33 and a second partition 34 that are opposite to each other along its thickness direction. The first protrusion 32 is arranged on the first partition 33. The first protrusion 32 extends along the length direction of the thermal insulation board 30 and extends from one end of the length direction of the first partition 33 to the other end.

[0130] Specifically, the first protrusion 32 is formed on the side surface of the first partition 33 facing the side beam 18, opposite the hollow space 31. The path along the length of the insulation board 30 between the ends of the insulation board 30 can be a straight line, a curved line, or an irregular path combining straight and curved lines, which is not limited in this application. For example, the first protrusion 32 is in the form of a straight strip, extending from one end of the first partition 33 to the other.

[0131] In this way, the first protrusion 32 extends along the length direction of the insulation board 30 and extends from the first end to the other end of the length direction of the first partition board 33. Therefore, when the first protrusion 32 abuts against the side beam 18 and is compressed, the force along the length direction of the insulation board 30 is relatively uniform, which is conducive to structural stability.

[0132] See also Figure 4 and Figure 5 In some embodiments, there are multiple first protrusions 32 , and the multiple first protrusions 32 are arranged at intervals along the width direction of the heat insulation board 30 .

[0133] Specifically, the number of first protrusions 32 can be three, six, seven, ten, twelve, or more, and this application does not impose any limitation thereto. The number of first protrusions 32 and the spacing between adjacent first protrusions 32 along the width of the thermal insulation board 30 can match the width of the thermal insulation board 30. For example, the first protrusions 32 are arranged at intervals of approximately one twentieth of the width of the first partition 33, and the number of first protrusions 32 is nineteen.

[0134] The multiple first protrusions 32 can be arranged at equal intervals along the width of the heat shield 30, or at uneven intervals. The multiple first protrusions 32 can be arranged at uneven intervals on the first baffle 33, and can be arranged densely in areas with greater pressure, depending on the distribution of pressure applied by the side beams 18 to the first baffle 33.

[0135] In this way, the plurality of first protrusions 32 are arranged at intervals along the width direction of the heat shield 30 , which is conducive to dispersing stress, so that the heat shield 30 has sufficient supporting strength between the battery cells 20 and the side beams 18 .

[0136] See also Figure 4 and Figure 5 In some embodiments, the plurality of first protrusions 32 are arranged at equal intervals along the width direction of the heat insulation board 30 .

[0137] Specifically, the plurality of first protrusions 32 are arranged at equal intervals along the width direction of the heat insulation board 30 , that is, the distance between two adjacent first protrusions 32 along the width direction of the heat insulation board 30 is a fixed value.

[0138] In this way, by arranging the plurality of first protrusions 32 at equal intervals along the width direction of the heat insulation plate 30 , the stress distribution is further uniformed, the supporting strength of the heat insulation plate 30 is increased, and the internal structure of the battery device 100 is kept stable.

[0139] Optionally, in some embodiments, the plurality of first protrusions 32 are all strip-shaped and extend along the width direction of the heat insulation board 30 . The plurality of first protrusions 32 may be arranged at intervals along the length direction of the heat insulation board 30 .

[0140] Optionally, in some embodiments, the first protrusion 32 may be a columnar or hemispherical bump, and there are multiple bumps, and the multiple bumps are dispersed on the first separator 33 .

[0141] Optionally, in some embodiments, there are multiple first protrusions 32 , including multiple rib-shaped protrusions and multiple block-shaped protrusions. Multiple first protrusions 32 of different shapes can be distributed at intervals on the first partition 33 .

[0142] Optionally, see Figure 7 and Figure 8 In some embodiments, the first protrusion 32, the support portion 311 and the second protrusion 35 are aligned along the thickness direction of the thermal insulation board 30. The number and shape structure of the second protrusion 35 may be the same as those of the first protrusion 32. Multiple second protrusions 35 may be distributed on the second partition plate 34 at positions opposite to the first protrusion 32 along the thickness direction.

[0143] Illustratively, the second protrusions 35 extend linearly along the length of the thermal insulation board 30, extending from one end to the other end of the second partition plate 34 in the longitudinal direction. Multiple second protrusions 35 may be provided, and the plurality of second protrusions 35 may be spaced apart along the width of the second partition plate 34. Each second protrusion 35 corresponds one-to-one with each first protrusion 32 and is aligned with the corresponding first protrusion 32 along the thickness direction of the thermal insulation board 30.

[0144] See also Figure 2 The electrical device of the embodiment of the present application includes the battery device 100 of any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0145] The electric device may be a device or system using any of the aforementioned battery devices 100. For example, the electric device may be an electric vehicle. In another example, the electric device may also be an energy storage device.

[0146] In some embodiments, the electrical device is a vehicle 1000 , and the battery device 100 includes a housing 10 , wherein a plurality of battery cells 20 are disposed in the housing 10 ; at least a portion of a chassis of the vehicle 1000 constitutes an upper cover of the housing 10 .

[0147] Optionally, in one embodiment, a notch may be formed in the chassis of the vehicle 1000 , and the battery device 100 is installed in the notch with the first portion 11 facing the chassis of the vehicle 1000 , so that the battery device 100 is assembled on the vehicle 1000 , and the first portion 11 constitutes a part of the chassis of the vehicle 1000 .

[0148] Optionally, in one embodiment, please combine Figure 2 The first part 11 can serve as an upper cover of the box body 10 , and the first part 11 can constitute a chassis of the vehicle 1000 .

[0149] The battery device 100 of this embodiment can form a CTP (Cell To Pack) solution. Compared to a battery device 100 of an MTP (Module To Pack) solution, the CTP solution of this embodiment can reduce the number of structural components required to secure the battery modules, thereby improving the space utilization within the housing 10. Thus, for a housing 10 of the same size, the number of battery cells 20 within the housing 10 can be increased, thereby increasing the energy density of the battery device 100.

[0150] Optionally, see Figure 2 In some embodiments, the box body 10 further includes a first expansion beam 13 and a second expansion beam 14, and the first expansion beam 13 and the second expansion beam 14 are spaced apart and arranged in the second portion 12. The plurality of battery cells 20 are arranged along the first direction (eg Figure 2 The two rows of battery columns 25 are connected along the second direction (such as Figure 2 It is understood that in other embodiments, the number of rows of battery columns 25 includes but is not limited to a single row, two rows, or more than two rows.

[0151] The first expansion beam 13 and the second expansion beam 14 can be arranged at both ends of the battery column 25 along the first direction. Figure 2 In the figure, the first expansion beam 13 and the second expansion beam 14 are respectively arranged at the front end and the rear end of a row of battery columns 25. The battery cell 20 located at the front end of the battery column 25 cooperates with the first expansion beam 13, and the battery cell 20 located at the rear end of the battery column 25 cooperates with the second expansion beam 14, so that the first expansion beam 13 and the second expansion beam 14 restrain the row of battery columns 25 in the front-to-back direction (first direction).

[0152] Optionally, in Figure 2In the battery device 100, the first expansion beam 13 aligns with the largest wall surface of the battery cell 20 at the front end, while the second expansion beam 14 aligns with the largest wall surface of the battery cell 20 at the rear end. During battery cell 20 operation, as the electrode assembly releases gas, the largest wall surface of the housing expands more than the other housing walls. By aligning the first expansion beam 13 and the second expansion beam 14 with the largest wall surface of the battery cell 20 at the end, cracking of the largest wall surface of the housing due to excessive expansion can be prevented to a certain extent, thereby improving the safety of the battery device 100.

[0153] In the battery device 100 of this embodiment, the first expansion beam 13 and the second expansion beam 14 can both be side beams 18 , and sandwich the heat insulation plate 30 with the battery cells 20 or the heat exchange plate (not shown).

[0154] Optionally, the battery device 100 further includes a crossbeam 16 and a longitudinal beam 17. The crossbeam 16 connects the two side panels (such as the left panel and the right panel) of the second portion 12 along the second direction, and the longitudinal beam 17 connects the first expansion beam 13 and the second expansion beam 14 arranged along the first direction. The crossbeam 16 connects the longitudinal beam 17, thereby improving the structural strength of the box body 10. The present application does not specifically limit the number of the crossbeams 16 and the longitudinal beams 17. Figure 2 In the embodiment, the number of the cross beam 16 and the number of the longitudinal beam 17 are both one, and one cross beam 16 is connected to one longitudinal beam 17, thereby increasing the structural strength of the box body 10.

[0155] Thus, the battery cells 20 at the end portions cooperate with the first expansion beam 13 and the second expansion beam 14 respectively, so that the first expansion beam 13 and the second expansion beam 14 can restrain the battery cells 20 when the battery cells 20 expand.

[0156] In the electrical device of the technical solution of the present application, by adding a protruding structure 36 toward the side beam 18 and / or the battery cell 20 on the heat insulation plate 30, the contact area between the heat insulation plate 30 and the box body 10 and / or the heat insulation plate 30 and the battery cell 20 is reduced, thereby reducing and slowing down the heat transfer between the battery cell 20 and the box body 10, improving the heat insulation effect, and further facilitating the enhancement of the thermal management capability of the battery device 100 in extreme temperature environments.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: a box body, the box body comprising at least one side beam; a battery cell, the battery cell being accommodated in the box; and A heat insulation plate is arranged between the side beam and the battery cell, a hollow area is formed inside the heat insulation plate, and a protrusion structure is formed on the heat insulation plate toward the side beam and / or the battery cell, and the protrusion structure abuts against the side beam or the battery cell toward which it faces.

2. The battery device according to claim 1, wherein: The heat insulation plate includes a first partition and a second partition that are opposite and spaced apart along the thickness direction of the heat insulation plate, the hollow space is formed by the interval between the first partition and the second partition, the first partition faces the side beam, and the second partition faces the battery cell, the protrusion structure includes a first protrusion facing the side beam, the first protrusion is formed on the first partition and abuts against the side beam.

3. The battery device according to claim 2, characterized in that The surface of the second separator facing the battery cell is a flat surface and is in contact with the battery cell.

4. The battery device according to claim 2, wherein: A heat exchange plate is provided on one side of the battery cell facing the side beam, and a surface of the second partition facing the battery cell is a flat surface and is in contact with the heat exchange plate.

5. The battery device according to claim 2, wherein: The protrusion structure further includes a second protrusion facing the battery cell, wherein the second protrusion is formed on the second separator and abuts against the battery cell.

6. The battery device according to claim 2, wherein: A heat exchange plate is provided on one side of the battery cell facing the side beam, and the protrusion structure further includes a second protrusion facing the battery cell. The second protrusion is formed on the second partition plate and abuts against the heat exchange plate.

7. The battery device according to claim 1, wherein: The thermal insulation plate includes a first partition plate and a second partition plate that are opposite and spaced apart along the thickness direction of the thermal insulation plate. The hollow space is formed by the interval between the first partition plate and the second partition plate. The first partition plate faces the side beam, and the second partition plate faces the battery cell. The protrusion structure includes a second protrusion facing the battery cell, and the second protrusion is formed on the second partition plate.

8. The battery device according to claim 7, characterized in that The surface of the first partition facing the side beam is a flat surface and fits the side beam, and the second protrusion abuts against the battery cell; or, The surface of the first partition facing the side beam is a flat surface and is in contact with the side beam. A heat exchange plate is provided on the side of the battery cell facing the side beam, and the second protrusion abuts against the heat exchange plate.

9. The battery device according to claim 2 or 7, characterized in that: The heat insulation board further includes a support portion, which is located in the hollow space and connects the first partition plate and the second partition plate.

10. The battery device according to claim 9, characterized in that The protrusion structure includes a first protrusion facing the side beam and a second protrusion facing the battery cell. The first protrusion, the support portion, and the second protrusion are aligned along a thickness direction of the heat insulation board.

11. The battery device according to claim 2, wherein: The first protrusion extends along the length direction of the heat insulation board and extends from one end to the other end of the first partition board in the length direction.

12. The battery device according to claim 11, wherein: There are multiple first protrusions, and the multiple first protrusions are arranged at intervals along the width direction of the heat insulation board.

13. The battery device according to claim 12, characterized in that The plurality of first protrusions are arranged at equal intervals along the width direction of the heat insulation board.

14. The battery device according to claim 1, wherein: The battery cell includes two first walls opposite to each other along a first direction. The area of ​​the first wall is larger than the area of ​​other walls of the battery cell. The first wall faces the heat insulation board and abuts against the heat insulation board.

15. The battery device according to claim 14, characterized in that There are multiple battery cells, and the multiple battery cells are arranged along the first direction to form a battery column. There are two side beams, and the two side beams are respectively arranged at the two ends of the battery column along the first direction. The heat insulation plate is provided between each side beam and the first wall of the adjacent battery cell.

16. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 15, wherein the battery device is used to provide electrical energy.

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