Battery device and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a box body, the box body comprises a top cover, a bottom plate and a frame structure, the frame structure defines a containing space penetrating in the first direction, and the top cover and the bottom plate are connected to the frame structure in the first direction and cover the containing space; the battery monomer assembly is accommodated in the accommodating space, and the battery monomer assembly comprises at least two battery monomers arranged along a second direction; the battery monomer comprises a shell and two electrode terminals arranged on the shell, the shell is provided with two first surfaces arranged along a third direction, and the two electrode terminals are arranged on the same first surface; the first direction, the second direction and the third direction are mutually vertical in pairs; according to the battery device provided by the embodiment of the invention, the electrode terminal faces the side surface of the battery device, so that the occupation of the electrode terminal on the height space of the battery device is reduced, the space utilization rate of the battery monomer in the height direction of the battery device is improved, and the energy density is improved.

Description

Technical Field

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

[0002] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0003] In current battery devices, the electrode terminals are mostly oriented towards the top cover of the casing. For battery cells that are wide and thin, this arrangement can easily lead to a large amount of empty space near the top cover of the battery device, resulting in a lower energy density of the battery device. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can mitigate the negative impact of a battery cell with a large width and a small thickness on the energy density of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including:

[0006] The housing includes a top cover, a bottom plate, and a frame structure. The frame structure encloses a receiving space that extends along a first direction. The top cover and bottom plate are connected to the frame structure along the first direction and cover the receiving space. A battery cell assembly is housed in the receiving space. The battery cell assembly includes at least two battery cells arranged along a second direction. Each battery cell includes a housing and two electrode terminals disposed on the housing. The housing has two first surfaces arranged along a third direction, and the two electrode terminals are disposed on the same first surface. The first direction, the second direction, and the third direction are perpendicular to each other.

[0007] In this embodiment, the electrode terminals are oriented towards the side of the battery device to reduce the space occupied by the electrode terminals in the height of the battery device, thereby improving the space utilization rate of the battery cells in the height direction of the battery device; at the same time, the battery cells can also provide certain support for the housing in the height direction to improve the strength of the battery device.

[0008] In some embodiments, the battery cell assembly further includes at least two battery cells arranged along a third direction; in the third direction, the electrode terminals of two adjacent battery cells are arranged opposite each other.

[0009] In this embodiment, the electrode terminals of two adjacent battery cells in the third direction are positioned opposite each other to reduce the difficulty of arranging the electrical connection structure between the electrode terminals and to reduce the space occupied by the electrical connection structure. At the same time, the electrode terminals and the electrical connection structure are placed in the center of the battery device. In the event of a collision, this arrangement can reduce the risk of damage to the electrode terminals and the electrical connection structure and improve the safety performance of the battery device.

[0010] In some embodiments, the battery cell further includes a pressure relief structure disposed on the housing, wherein the pressure relief structure and the electrode terminals are located on different sides of the housing.

[0011] In the technical solution of this embodiment, when the two electrode terminals are arranged opposite to each other, the pressure relief structure is located on a side of the casing other than the electrode terminals, so as to reduce the impact of thermal runaway of a single battery cell on the electrical connection structure and other battery cells, thereby reducing the risk of thermal runaway propagation caused by thermal runaway of a single battery cell and improving the safety performance of the battery device.

[0012] In some embodiments, a first protective structure is further provided between the battery cell assembly and the inner surface of the housing in a third-party orientation.

[0013] In the technical solution of this embodiment, a first protective structure is provided between the battery cell assembly and the inner surface of the casing to separate the battery cell and the casing. In the event of a collision, the first protective structure can buffer and absorb a portion of the collision energy received by the casing to reduce the collision energy transmitted to the battery cell. At the same time, the deformation of the casing caused by the collision can also act on the first protective structure first, thereby reducing the risk of the battery cell being directly damaged by the casing.

[0014] In some embodiments, the pressure relief structure and the electrode terminals are respectively disposed on different first surfaces; the first protective structure is provided with an exhaust groove on the side facing the adjacent first surface, and the exhaust groove is disposed corresponding to the pressure relief structure.

[0015] In the technical solution of this embodiment, an exhaust groove is provided on the first protective structure, and the pressure relief structure is correspondingly provided with the exhaust groove. In the case of thermal runaway of a battery cell, the exhaust groove can guide the flow of high-temperature and high-pressure flue gas generated by thermal runaway, so as to constrain the flow of high-temperature and high-pressure flue gas and reduce the irregular escape of high-temperature and high-pressure flue gas, thereby reducing the damage that high-temperature and high-pressure flue gas may cause to the battery cell and other structures.

[0016] In some embodiments, the first protective structure is an insulating structural member; and / or, in a third-party direction, a first insulating structure is provided between the battery cell assembly and the first protective structure.

[0017] In the technical solution of this embodiment, the first protective structure is an insulating structural component, or a first insulating structure is provided between the first protective structure and the adjacent battery cell, so as to reduce the risk of short circuit between the battery cell and the casing, thereby improving the safety performance of the battery device.

[0018] In some embodiments, in the third direction, a second insulating structure is provided between two adjacent battery cells to insulate and separate the electrode terminals on both sides of the second insulating structure.

[0019] In the technical solution of this embodiment, a second insulating structure is provided between two battery cells that are adjacent in the third direction. The electrode terminals on the two adjacent battery cells are insulated and separated by the second insulating structure, and the adjacent electrical connection structures are also insulated and separated. This reduces the risk of short circuits or high-voltage breakdowns in battery cells or electrical connection structures, and improves the safety performance of the battery device.

[0020] In some embodiments, the battery cell assembly further includes at least two battery cells arranged along a third direction; in the third direction, the electrode terminals of two adjacent battery cells are positioned far apart from each other.

[0021] In this embodiment, the electrode terminals of two adjacent battery cells in the third direction are arranged opposite to each other to increase the distance between the electrode terminals of adjacent battery cells in the third direction and to provide electrical isolation, thereby reducing the risk of high-voltage discharge, short circuit and other risks and improving the safety performance of the battery device.

[0022] In some embodiments, the battery cell further includes a pressure relief structure disposed on the housing, wherein the pressure relief structure and the electrode terminals are located on different sides of the housing.

[0023] In this embodiment, the pressure relief structure and electrode terminals are located on different sides of the battery cell to reduce the impact of thermal runaway of a single battery cell on the electrical connection structure and other battery cells, thereby reducing the risk of thermal runaway propagation caused by thermal runaway of a single battery cell and improving the safety performance of the battery device.

[0024] In some embodiments, the pressure relief structure is located on one side of the battery cell along the first direction.

[0025] In the technical solution of this embodiment, since the battery cells are arranged along a third direction, and the electrode terminals of two adjacent battery cells in the third direction are set away from each other along the third direction, the pressure relief structure is set on one side of the battery cell along the first direction to reduce the risk of thermal runaway of a single battery cell damaging the pressure relief structure of other adjacent battery cells and improve the safety performance of the battery device.

[0026] In some embodiments, in the third-party direction, the battery cells are spaced apart from the inner surface of the housing.

[0027] In this embodiment, the battery cells are spaced apart from the inner surface of the casing to form a buffer space between them. In the event of a collision, this arrangement reduces the impact energy transmitted to the battery cells and also reduces the risk of the casing deforming and colliding with the battery cells, thus improving the safety performance of the battery device. At the same time, the buffer space also provides electrical isolation, reducing the risk of short circuits between the battery cells and the casing, further improving the safety performance of the battery device.

[0028] In some embodiments, a third insulating structure is provided between the battery cell and the inner surface of the casing in a third-party orientation.

[0029] In the technical solution of this embodiment, a third insulating structure is provided between the battery cell and the inner surface of the casing to electrically isolate the battery cell and the casing, reduce the risk of short circuit between the battery cell and the casing, and improve the safety performance of the battery device. At the same time, the third insulating structure can also absorb the collision energy when the casing is hit, and can reduce the risk of the casing deformation directly squeezing the battery cell, further improving the safety performance of the battery device.

[0030] In some embodiments, in the third-party direction, a second protective structure is provided between the battery cell and the inner surface of the housing, and the second protective structure is connected to the housing or an adjacent battery cell.

[0031] In this embodiment, a second protective structure is provided between the battery cell assembly and the inner surface of the casing to separate the battery cell and the casing. In the event of a collision, the second protective structure can buffer and absorb a portion of the collision energy received by the casing, thereby reducing the collision energy transmitted to the battery cell. Simultaneously, the deformation of the casing caused by the collision can also act on the second protective structure first, thereby reducing the risk of the battery cell being directly damaged by the casing. By connecting the second protective structure only to the casing or the battery cell, this arrangement can provide an obstacle to the transmission of collision energy and also provide space for the deformation of the casing in the event of a collision, thus better protecting the battery cell.

[0032] In some embodiments, the top cover and / or bottom plate are connected to the battery cell.

[0033] The technical solution of this embodiment provides some specific structures of the housing, so that the bottom plate is connected to the battery cell to support the battery cell and provide support and fixation foundation for the battery cell, and the top cover is connected to the battery cell to provide support for the top cover through the battery cell, thereby improving the strength and support performance of the top cover.

[0034] In some embodiments, in the first direction, the ratio between the size of the battery cell and the size of the housing ranges from 80% to 97%.

[0035] The technical solution of this embodiment provides some dimensional relationships between individual battery cells and the housing in the first direction, so that the individual battery cells can occupy more housing space in the first direction, thereby improving the energy density of the battery device.

[0036] In some embodiments, the size of the battery cell in the second direction ranges from 10 mm to 50 mm; the size of the battery cell in the first direction ranges from 60 mm to 150 mm; and the ratio of the size of the battery cell in the third direction to the size of the battery cell in the first direction is greater than or equal to 1.2.

[0037] The technical solution of this embodiment provides a range of dimensions for individual battery cells in the second and first directions. The individual battery cells are smaller in the second direction and larger in the third direction. Accordingly, the electrode terminals are disposed on the side of the individual battery cells along the third direction to reduce the space occupied by the electrode terminals in the height of the battery device, thereby improving the space utilization rate of the individual battery cells in the height direction of the battery device. At the same time, the individual battery cells can also provide certain support for the housing in the height direction to improve the strength of the battery device.

[0038] Secondly, embodiments of this application also provide an electrical device, including the battery device provided in some embodiments of the first aspect.

[0039] 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

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0042] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0043] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0044] Figure 4 This is a partially enlarged schematic diagram of a battery device provided in some embodiments of this application;

[0045] Figure 5 This is a partially enlarged schematic diagram of a battery device provided in other embodiments of this application;

[0046] Figure 6 Three-dimensional schematic diagram of a battery cell provided for some embodiments of this application Figure 1 ;

[0047] Figure 7 Three-dimensional schematic diagram of a battery cell provided for some embodiments of this application Figure 2 .

[0048] The markings in the diagram mean:

[0049] 1000, vehicles;

[0050] 100. Battery device;

[0051] 10. Box body; 11. Frame structure; 12. Top cover; 13. Bottom plate; 14. Storage space;

[0052] 20. Battery cell assembly; 21. Battery cell; 211. Housing; 2111. End cap; 2112. Housing; 2113. First surface; 212. Electrode assembly; 213. Electrode terminal; 214. Pressure relief structure;

[0053] 30. First protective structure; 31. Exhaust vent;

[0054] 40. Second insulation structure;

[0055] 200. Motor;

[0056] 300. Controller. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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).

[0063] 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.

[0064] 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.

[0065] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0066] In current battery devices, the electrode terminals of the battery cells mostly face the top cover of the casing. For battery cells with a larger width and thinner thickness (such as thin plate-shaped battery cells), the area and width of the side of the battery cell facing the top cover are larger, the distance between the two electrode terminals is also larger, and the empty space between the electrode terminals is also larger, resulting in a lower energy density of the battery device.

[0067] Meanwhile, the empty space between the electrode terminals will also have a negative impact on the strength of the top cover. A large empty space between the electrode terminals can also easily lead to a decrease in the strength of the top cover and make the top cover more likely to deform into the box after being hit.

[0068] Based on the above considerations, in order to mitigate the negative impact of battery cells with larger width and smaller thickness on the energy density and top cover strength of the battery device, this application provides a battery device including a housing and a battery cell assembly, wherein the housing includes a top cover, a frame structure and a bottom plate arranged along a first direction, the battery cell assembly includes battery cells arranged along a second direction, and the electrode terminals of the battery cells are disposed on one side of the battery cells along a third direction.

[0069] In such a battery device, the electrode terminals face the side of the battery device instead of the top cover, in order to reduce the space occupied by the electrode terminals in the height of the battery device, thereby improving the space utilization rate of the battery cells in the height direction of the battery device; at the same time, the side of the battery cells facing the top cover can also provide some support for the casing in the height direction, thereby improving the strength of the battery device.

[0070] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use battery devices as energy storage elements. Electrical devices can be, but are 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.

[0071] 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.

[0072] refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 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 is installed inside the vehicle 1000, and the battery can be located at the bottom, front, or rear of the vehicle 1000. The battery can be used to power the vehicle 1000; for example, the battery can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 300 and a motor 200. The controller 300 is used to control the battery to supply power to the motor 200, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0073] In some embodiments of this application, the battery 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.

[0074] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application.

[0075] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 may include multiple battery cells 21, which are connected in series, parallel, or mixed connection via a busbar.

[0076] In some embodiments, the battery cell assembly 20 is typically formed by arranging a plurality of battery cells 21.

[0077] As an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing multiple battery cells 21 together. As an example, the battery module can be formed by bundling multiple battery cells 21 together with cable ties.

[0078] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed within the housing 10.

[0079] As an example, the battery cell assembly 20 can be a battery module, which can be housed in the housing 10 by fixing the battery module in the housing 10.

[0080] As an example, the battery cell assembly 20 can also be housed in the housing 10 by directly fixing multiple battery cells 21 to the housing 10.

[0081] As an example, the housing 10 may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing 10 to house the battery cell assembly 20. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing may be a top cover 12 or a bottom plate 13.

[0082] As an example, the housing 10 may include a top cover 12, a frame structure 11, and a bottom plate 13. The top cover 12 and the bottom plate 13 are respectively connected to the frame structure 11, so that the interior of the housing 10 forms a closed space to accommodate the battery cell assembly 20.

[0083] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0084] refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 21 provided in some embodiments of this application. A battery cell 21 refers to the smallest unit that makes up a battery. The battery cell 21 can be a rechargeable battery, meaning that after the battery cell 21 has been discharged, its active materials can be activated by charging and it can continue to be used.

[0085] The battery cell 21 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0086] As shown in the figure, the battery cell 21 includes a housing 211, an electrode assembly 212, and other functional components. The housing 211 includes a shell 2112 and an end cap 2111.

[0087] End cap 2111 refers to a component that covers the opening of housing 2112 to isolate the internal environment of battery cell 21 from the external environment. The shape of end cap 2111 can be adapted to the shape of housing 2112 to fit it. Optionally, end cap 2111 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 2111 is not easily deformed under pressure or impact, giving battery cell 21 higher structural strength and improved safety performance. Functional components such as electrode terminals 213 can be provided on end cap 2111. Electrode terminals 213 can be used for electrical connection with electrode assembly 212 for outputting or inputting electrical energy from battery cell 21. In some embodiments, end cap 2111 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 21 reaches a threshold. The end cap 2111 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 2111. The insulating element can be used to isolate the electrical connection components inside the housing 2112 from the end cap 2111 to reduce the risk of short circuit. For example, the insulating element can be plastic, rubber, etc.

[0088] The housing 2112 is a component used to cooperate with the end cap 2111 to form the internal environment of the battery cell 21. This internal environment can accommodate the electrode assembly 212, electrolyte, and other components. The housing 2112 and the end cap 2111 can be independent components. An opening can be provided on the housing 2112, and the end cap 2111 closes the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 2111 and the housing 2112 can be integrated. Specifically, the end cap 2111 and the housing 2112 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 2112, the end cap 2111 closes the housing 2112. The housing 2112 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 2112 can be determined according to the specific shape and size of the electrode assembly 212. The shell 2112 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0089] Electrode assembly 212 is the component in the battery cell 21 where electrochemical reactions occur. The casing 2112 may contain one or more electrode assemblies 212. The electrode assembly 212 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 212, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 213 to form a current loop.

[0090] Firstly, reference Figure 2 , Figure 4 , Figure 5 This application provides a battery device 100, including a housing 10 and a battery cell assembly 20. The housing 10 includes a top cover 12, a bottom plate 13, and a frame structure 11. The frame structure 11 forms a receiving space 14 extending along a first direction. The top cover 12 and the bottom plate 13 are connected to the frame structure 11 along the first direction and cover the receiving space 14. The battery cell assembly 20 is housed in the receiving space 14. The battery cell assembly 20 includes at least two battery cells 21 arranged along a second direction. Each battery cell 21 includes a housing 211 and two electrode terminals 213 disposed on the housing 211. The housing 211 has two first surfaces 2113 arranged along a third direction, and both electrode terminals 213 are disposed on the same first surface 2113. The first direction, the second direction, and the third direction are mutually perpendicular.

[0091] In the figure, the X-axis is the second direction, which is also the length direction of the battery device 100; the Y-axis is the third direction, which is also the width direction of the battery device 100; and the Z-axis is the first direction, which is also the height direction of the battery device 100.

[0092] The housing 10 refers to the structure in the battery device 100 that provides a space 14 for housing the battery cell 21. The battery cell 21 is housed in the housing 10. Other structures of the battery device 100 can also be housed in the housing 10 or connected to the housing 10. The housing 10 can be a prism-shaped, cylindrical, or other shaped structure.

[0093] The frame structure 11 refers to the structure located around the perimeter of the housing 10. The frame structure 11 is mainly used to provide support for the housing 10 and to protect the battery cells 21 or other structures inside the housing 10. The frame structure 11 can form a through-space 14 along the first direction, that is, the frame structure 11 can be a ring structure, which can be a square ring, a pentagonal ring, a circular ring or other ring structure. The frame structure 11 can be formed by connecting plates, beams or other structural components. The frame structure 11 can be made by a one-piece molding process. The material of the frame structure 11 can include metal, plastic or other materials.

[0094] The accommodating space 14 refers to the spatial structure enclosed by the frame structure 11, in which the battery cell assembly 20 can be accommodated. The accommodating space 14 can be a prism-shaped space, a cylindrical space, or other shaped spatial structure, and the shape of the accommodating space 14 can also be set according to the shape of the frame structure 11.

[0095] The top cover 12 refers to the structure located on one side of the housing 10 along the first direction. The top cover 12 can be a plate structure or a structure formed by splicing multiple beams. The top cover 12 can also be a heat exchange component of the battery device 100 or other structures. The material of the top cover 12 can include metal, plastic or other materials. When the battery device 100 is installed in the vehicle 1000, the top cover 12 can also serve as at least part of the floor structure of the vehicle 1000.

[0096] The base plate 13 refers to the structure located on the other side of the housing 10 along the first direction. The base plate 13 can be a plate structure or a structure formed by splicing multiple beams. The base plate 13 can also be a heat exchange component, bottom guard plate or other structure of the battery device 100. The material of the base plate 13 can include metal, plastic or other materials. When the battery device 100 is installed in the vehicle 1000, the base plate 13 can also serve as the bottom guard plate of the vehicle 1000.

[0097] The top cover 12 and the bottom plate 13 are both connected to the frame structure 11. The top cover 12 and the bottom plate 13 can be connected to the frame structure 11 by welding, screwing, bonding or other means. The top cover 12 and the bottom plate 13 are respectively connected to the two sides of the frame structure 11 along the first direction and cover the receiving space 14. At this time, the top cover 12, the bottom plate 13 and the frame structure 11 together form a closed receiving space 14.

[0098] The first direction can be the height direction Z of the battery device 100, or it can be any other direction.

[0099] A battery cell 21 refers to the smallest unit that makes up the battery device 100. A battery cell 21 can be a cylindrical structure, a prismatic structure, a sheet structure, or other shapes. A battery cell assembly 20 includes at least two battery cells 21, that is, the number of battery cells 21 can be two, three or more, and at least two battery cells 21 are connected in series, parallel or mixed through a busbar component.

[0100] At least two battery cells 21 are arranged along a second direction to form a battery cell assembly 20. In the second direction, the number of battery cells 21 can be two, three or more.

[0101] The second direction can be the length direction X of the battery device 100, the width direction Y of the battery device 100, or other directions; the second direction is perpendicular to the first direction, that is, the arrangement direction of the battery cells 21 is different from the through direction of the accommodating space 14.

[0102] The battery cell assembly 20 is housed in the housing space 14. The battery cell assembly 20 can be connected to one of the frame structure 11, the top cover 12, or the bottom plate 13. The battery cell assembly 20 can also be connected to the frame structure 11, the top cover 12, and the bottom plate 13 simultaneously. The battery cell assembly 20 can be directly connected to the frame structure 11, the top cover 12, or the bottom plate 13, or it can be indirectly connected to the frame structure 11, the top cover 12, or the bottom plate 13 through an intermediate structure.

[0103] The outer casing 211 refers to the structure used to form the internal environment of the battery cell 21. The formed internal environment can be used to accommodate the electrode terminals 213, electrolyte, and other structures. The outer casing 211 can be a prismatic structure, a cylindrical structure, or other shaped structures. The material of the outer casing 211 can include metal, plastic, or other materials.

[0104] The outer casing 211 has a first surface 2113, that is, the first surface 2113 is one of the surfaces, and there are two first surfaces 2113 arranged opposite each other along a third direction on both sides of the outer casing 211.

[0105] The third direction can be the length direction X of the battery device 100, the width direction Y of the battery device 100, or other directions. The third direction is perpendicular to the first direction, that is, the arrangement direction of the battery cells 21 is different from the through direction of the accommodating space 14, that is, the first surface 2113 is not parallel to the top cover 12 and the bottom plate 13, nor does it face the top cover 12 and the bottom plate 13. The third direction is perpendicular to the second direction, that is, the first surface 2113 does not face the arrangement direction of the battery cells 21, and the first surface 2113 of one battery cell 21 is not opposite to the first surface 2113 of another adjacent battery cell 21.

[0106] Electrode terminal 213 refers to the structure in battery cell 21 used for inputting and outputting electrical energy. There are two electrode terminals 213, which serve as the positive and negative terminals of battery cell 21, respectively. Electrode terminal 213 is connected to housing 211. Electrode terminal 213 can be connected to housing 211 by welding, bonding, snap-fitting or other means. One end of electrode terminal 213 can extend into housing 211 to connect with electrode assembly 212 or other structures, and the other end of electrode terminal 213 is exposed outside housing 211 to connect with wire harness, metal sheet or other electrical connection structure.

[0107] Both electrode terminals 213 are located on the same first surface 2113, that is, the two electrode terminals 213 are located on the same surface, so as to reduce the space occupied by the electrode terminals 213 and the electrical connection structures (such as pads, wire harnesses, etc.) connected to the electrode terminals 213; at the same time, since the first surface 2113 does not face the top cover 12 and the bottom plate 13, the electrode terminals 213 also do not face the top cover 12 and the bottom plate 13, so as to reduce the empty space between the battery cell 21 and the top cover 12, and between the battery cell 21 and the floor, thereby increasing the space ratio of the battery cell 21 in the first direction and increasing the energy density of the battery device 100.

[0108] In this embodiment, the electrode terminals 213 are oriented toward the side of the battery device 100 to reduce the space occupied by the electrode terminals 213 in the height of the battery device 100, thereby improving the space utilization rate of the battery cell 21 in the height direction of the battery device 100; at the same time, the battery cell 21 can also provide a certain support for the housing 10 in the height direction to improve the strength of the battery device 100.

[0109] refer to Figure 4 In some embodiments, the battery cell assembly 20 further includes at least two battery cells 21 arranged along a third direction; in the third direction, the electrode terminals 213 of two adjacent battery cells 21 are arranged opposite each other.

[0110] The battery cell assembly 20 also includes at least two battery cells 21 arranged along a third direction. In the third direction, the number of battery cells 21 can be two, three or more. When the battery cell assembly 20 includes at least two battery cells 21 arranged along a second direction, the battery cell assembly 20 also includes at least two battery cells 21 arranged along a third direction. That is, the battery cells 21 are arranged in an array along the second direction and the third direction to form the battery cell assembly 20.

[0111] In the third direction, the electrode terminals 213 of two adjacent battery cells 21 are arranged opposite each other, that is, the electrode terminals 213 are arranged facing the inside of the battery cell assembly 20.

[0112] Taking a battery cell assembly 20 comprising two battery cells 21 in a third-direction orientation as an example, the electrode terminals 213 of two adjacent battery cells 21 in the third-direction orientation are arranged opposite each other and are close to each other. In this case, electrical connection structures (such as contacts, wiring harnesses, etc.) can be arranged between the two rows of battery cells 21 in the third-direction orientation, and these electrical connection structures can be connected to both adjacent rows of battery cells 21, reducing the space occupied by the electrical connection structures and simplifying their arrangement. Simultaneously, the electrode terminals 213 and the corresponding electrical connection structures are protected by the two rows of battery cells 21 in the middle of the battery cell assembly 20. In the event of a collision with the battery device 100, this arrangement reduces the risk of damage to the electrode terminals 213 and the corresponding electrical connection structures, thereby reducing the negative impact of the collision on the input and output of the battery device 100 and improving the stability and safety performance of the battery device 100.

[0113] In this embodiment, the electrode terminals 213 of two adjacent battery cells 21 in the third direction are positioned opposite each other to reduce the difficulty of arranging the electrical connection structure between the electrode terminals 213 and to reduce the space occupied by the electrical connection structure. At the same time, the electrode terminals 213 and the electrical connection structure are positioned in the center of the battery device 100. In the event of a collision, this arrangement can reduce the risk of damage to the electrode terminals 213 and the electrical connection structure and improve the safety performance of the battery device 100.

[0114] refer to Figure 4 , Figure 6 , Figure 7 In some embodiments, the battery cell 21 further includes a pressure relief structure 214 disposed on the housing 211, and the pressure relief structure 214 and the electrode terminal 213 are respectively located on different sides of the housing 211.

[0115] The pressure relief structure 214 refers to the structure in the battery cell 21 used to release internal pressure. The pressure relief structure 214 is used to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. The pressure relief structure 214 may include an explosion-proof valve, an explosion-proof diaphragm or other structures.

[0116] The pressure relief structure 214 is provided on the outer shell 211. The pressure relief structure 214 can be connected to the internal environment inside the outer shell 211 so that the pressure relief structure 214 can release the pressure inside the internal environment of the outer shell 211 to the accommodating space 14. The pressure relief structure 214 can be located on any side of the outer shell 211, that is, the pressure relief structure 214 can be provided on the end face or bottom face of the outer shell 211, or it can be provided on the side face of the outer shell 211.

[0117] The pressure relief structure 214 and the electrode terminal 213 are located on different sides of the outer casing 211. Since the electrode terminals 213 of the battery cells 21 arranged in the third direction are arranged opposite each other, and electrical structures such as electrical connection structures are also provided between adjacent battery cells 21 in the third direction, the pressure relief structure 214 and the electrode terminal 213 are located on different sides of the battery cells 21. In the event of thermal runaway of the battery cell 21, this arrangement can prevent the high-temperature and high-pressure flue gas released from the pressure relief structure 214 from directly contacting the electrode terminal 213 and its adjacent electrical connection structures, thereby reducing the damage to the electrical connection structure of the battery device 100 caused by the thermal runaway of the battery cell 21, and thus improving the stability and safety of the battery device 100.

[0118] Understandably, when the two electrode terminals 213 are located on the same first surface 2113 of the battery cell 21, the pressure relief structure 214 can be located on another first surface 2113 of the battery cell 21, or on other sides of the battery cell 21. For example, the pressure relief structure 214 can be provided on the side of the battery cell 21 facing the top cover 12 or the bottom plate 13; for example, the pressure relief structure 214 can be located on different first surfaces 2113 from the battery cell 21.

[0119] In this embodiment, when the two electrode terminals 213 are arranged opposite to each other, the pressure relief structure 214 is located on the other side of the housing 211 that is different from the electrode terminals 213, so as to reduce the impact of thermal runaway of a single battery cell 21 on the electrical connection structure and other battery cells 21, thereby reducing the risk of thermal runaway propagation caused by thermal runaway of a single battery cell 21 and improving the safety performance of the battery device 100.

[0120] refer to Figure 4 In some embodiments, a first protective structure 30 is provided between the inner surface of the battery cell assembly 20 and the housing 10 in a third-party orientation.

[0121] The first protective structure 30 refers to the structure in the battery device 100 used to protect the battery cell 21. The first protective structure 30 may include a plate structure, a strip structure, a frame structure or other structures. The shape of the first protective structure 30 may be a polygonal prism, a cylinder or other shapes. The number of first protective structures 30 may be one, two or more. The material of the first protective structure 30 may include metal, plastic or other materials.

[0122] The first protective structure 30 is disposed between the inner surfaces of the battery cell assembly 20 and the housing 10. The first protective structure 30 can be connected to the housing 10 or the battery cell assembly 20. The first protective structure 30 can be connected to the connected battery cell 21 or housing 10 by welding, bonding or other means.

[0123] Because the electrode terminals 213 are located on the first surface 2113 of the housing 211, and the first surface 2113 is arranged along a third direction, the first protective structure 30 is disposed between the battery cell 21 and the housing 10 along the third direction. With this arrangement, in the event of a collision from the third direction to the battery device 100, the first protective structure 30 can absorb a portion of the collision energy, thereby reducing the collision energy transmitted to the battery cell 21 and the collision energy transmitted to the electrode terminals 213 and the electrical connection structure. This improves the safety performance and connection stability of the electrode terminals 213 and the electrical connection structure. Simultaneously, in the event of a collision causing deformation of the housing 10, the first protective structure 30 can also absorb a portion of the deformation of the housing 10, thereby reducing the risk of the battery cell 21 being subjected to compression deformation and further improving the safety performance of the battery device 100.

[0124] In this embodiment, a first protective structure 30 is provided between the inner surfaces of the battery cell assembly 20 and the housing 10 to separate the battery cell 21 and the housing 10. In the event of a collision with the battery device 100, the first protective structure 30 can buffer and absorb a portion of the collision energy received by the housing 10, thereby reducing the collision energy transmitted to the battery cell 21. At the same time, the deformation of the housing 10 caused by the collision can also act on the first protective structure 30 first, thereby reducing the risk of the battery cell 21 being directly damaged by the pressure of the housing 10.

[0125] refer to Figure 4 , Figure 6 , Figure 7 In some embodiments, the pressure relief structure 214 and the electrode terminal 213 are respectively disposed on different first surfaces 2113; the first protective structure 30 is provided with an exhaust groove 31 on the side facing the adjacent first surface 2113, and the exhaust groove 31 is correspondingly disposed with the pressure relief structure 214.

[0126] Since the first surface 2113 of the battery cell 21 is arranged along the third direction, and the electrode terminals 213 of the battery cell 21 in the third direction are arranged opposite each other, that is, the electrode terminals 213 of the battery cell 21 face the interior of the battery cell assembly 20 along the third direction; at this time, the pressure relief structure 214 and the electrode terminals 213 are respectively arranged on different first surfaces 2113, that is, the pressure relief structure 214 is located on the side of the battery cell 21 facing the external environment, that is, the pressure relief structure 214 is located on the side of the battery cell 21 facing the frame structure 11.

[0127] In the event of thermal runaway of battery cell 21, this configuration allows the high-temperature, high-pressure flue gas generated by thermal runaway to be released in a direction away from electrode terminal 213, thereby reducing the risk of the high-temperature, high-pressure flue gas directly contacting electrode terminal 213 and electrical connection structure after release. It also allows the high-temperature, high-pressure flue gas to be released into the containment space 14 first, thereby reducing the pressure carried by the high-temperature, high-pressure flue gas and lowering its temperature. This reduces the potential damage caused by the high pressure carried by the high-temperature, high-pressure flue gas directly impacting electrode terminal 213 and electrical connection structure, and also reduces the potential damage caused by the high temperature of the high-temperature, high-pressure flue gas to electrode terminal 213 and electrical connection structure.

[0128] The exhaust groove 31 refers to the groove structure provided on the first protective structure 30. The exhaust groove 31 is used to guide the flow direction of the high temperature and high pressure flue gas generated by the thermal runaway of the battery cell 21, so that the high temperature and high pressure flue gas can flow along the exhaust groove 31 to the required position and limit the escape of the high temperature and high pressure flue gas, reducing the amount of high temperature and high pressure flue gas flowing to other positions of the battery device 100. The exhaust groove 31 can be connected to the pressure relief valve or other exhaust structure of the battery device 100 so that the high temperature and high pressure flue gas can be discharged outside the housing 10.

[0129] The exhaust groove 31 can extend in a straight line to guide the high-temperature and high-pressure flue gas to be discharged quickly, or it can extend in a curve to increase the flow time of the high-temperature and high-pressure flue gas in the exhaust groove 31, thereby facilitating the reduction of the pressure and temperature of the high-temperature and high-pressure flue gas; the exhaust groove 31 can be a trapezoidal groove, a square groove, a semi-circular groove, or other shaped groove structure.

[0130] The first protective structure 30 is disposed between the inner surfaces of the battery cell 21 and the housing 10 along a third direction, while the pressure relief structure 214 is disposed on the first surface 2113 of the battery cell 21 facing the frame structure 11, that is, the pressure relief structure 214 is opposite to and adjacent to the first protective structure 30. This allows the exhaust chute 31 to face the adjacent first surface 2113, and thus the exhaust chute 31 to face the adjacent pressure relief structure 214, so that the high-temperature, high-pressure flue gas discharged from the pressure relief structure 214 can better enter the exhaust chute 31.

[0131] Depending on the installation position of the first protective structure 30, the first protective structure 30 can abut against the battery cell 21. At this time, the pressure relief structure 214 is directly opposite to the exhaust groove 31, and the high-temperature and high-pressure flue gas discharged by the pressure relief structure 214 can directly enter the exhaust groove 31. Alternatively, there may be a gap between the first protective structure 30 and the battery cell 21. At this time, most of the high-temperature and high-pressure flue gas discharged by the pressure relief structure 214 can enter the exhaust groove 31.

[0132] In this embodiment, an exhaust groove 31 is provided on the first protective structure 30, and the pressure relief structure 214 is correspondingly provided with the exhaust groove 31. In the event of thermal runaway of the battery cell 21, the exhaust groove 31 can guide the flow of high-temperature and high-pressure flue gas generated by thermal runaway, thereby constraining the flow of high-temperature and high-pressure flue gas and reducing the irregular escape of high-temperature and high-pressure flue gas, thereby reducing the damage that high-temperature and high-pressure flue gas may cause to the battery cell 21 and other structures.

[0133] In some embodiments, the first protective structure 30 is an insulating structure; and / or in a third-party direction, a first insulating structure is provided between the battery cell assembly 20 and the first protective structure 30.

[0134] The first protective structure 30 can be an insulating structural component, and the material of the first protective structure 30 can include plastic, rubber, ceramic or other insulating materials.

[0135] The first insulating structure refers to a structural component with insulating properties in the battery device 100. The first insulating structure can be a structure made of insulating material, or it can be a surface insulating structure. The first insulating structure may include an insulating plate, an insulating film, an insulating coating, or other insulating structures. The material of the first insulating structure may include plastic, rubber, ceramic, or other insulating materials.

[0136] The first insulating structure is disposed between the inner surfaces of the battery cell 21 and the housing 10 along a third direction to reduce the risk of short circuit between the battery cell 21 and the housing 10 and discharge from the battery cell 21 to the housing 10, thereby improving the safety performance of the battery device 100.

[0137] Since the first protective structure 30 is also disposed in a third direction between the inner surfaces of the battery cell 21 and the housing 10, the first insulating structure can be located between the battery cell 21 and the first protective structure 30. The first insulating structure can be an independent structural component or a coating, film, or other structure formed on the first protective structure 30.

[0138] In this embodiment, the first protective structure 30 is made into an insulating structure, or a first insulating structure is provided between the first protective structure 30 and the adjacent battery cell 21, so as to reduce the risk of short circuit between the battery cell 21 and the housing 10, thereby improving the safety performance of the battery device 100.

[0139] refer to Figure 4 In some embodiments, in the third direction, a second insulating structure 40 is provided between two adjacent battery cells 21 to insulate and separate the electrode terminals 213 on both sides of the second insulating structure 40.

[0140] The second insulating structure 40 refers to a structural component with insulating properties in the battery device 100. The second insulating structure 40 can be a structure made of insulating material or a surface insulating structure. The second insulating structure 40 can be directly connected to the housing 10 or adjacent battery cells 21, or it can be indirectly connected to the housing 10 or adjacent battery cells 21 through an intermediate structure. The second insulating structure 40 can include an insulating plate, an insulating film, or other insulating structures. The material of the second insulating structure 40 can include plastic, rubber, ceramic, or other insulating materials.

[0141] Because the electrode terminals 213 of two adjacent battery cells 21 in the third direction are arranged opposite each other, and the distance between the electrode terminals 213 of the two battery cells 21 is relatively close, in the event of a collision or other incident, the electrode terminals 213 of the two adjacent battery cells 21 and the connected electrical connection structure are prone to contact and short circuit. Simultaneously, during the input or output process of the battery device 100, the high voltage at the electrode terminals 213 also poses a risk of high-voltage breakdown. Therefore, a second insulating structure 40 is disposed between two adjacent battery cells 21 in the third direction to reduce the risk of short circuit or high-voltage breakdown at the electrode terminals 213 of the two adjacent battery cells 21 in the third direction, thereby improving the stability and safety performance of the battery device 100.

[0142] In this embodiment, a second insulating structure 40 is provided between two adjacent battery cells 21 in the third direction to insulate and separate the electrode terminals 213 on the two adjacent battery cells 21 and to insulate and separate the adjacent electrical connection structures, thereby reducing the risk of short circuits or high-voltage breakdowns of the battery cells 21 or electrical connection structures and improving the safety performance of the battery device 100.

[0143] refer to Figure 2 , Figure 5 In some embodiments, the battery cell assembly 20 further includes at least two battery cells 21 arranged along a third direction; in the third direction, the electrode terminals 213 of two adjacent battery cells 21 are disposed away from each other.

[0144] The battery cell assembly 20 also includes at least two battery cells 21 arranged along a third direction. In the third direction, the number of battery cells 21 can be two, three or more. When the battery cell assembly 20 includes at least two battery cells 21 arranged along a second direction, the battery cell assembly 20 also includes at least two battery cells 21 arranged along a third direction. That is, the battery cells 21 are arranged in an array along the second direction and the third direction to form the battery cell assembly 20.

[0145] In the third direction, the electrode terminals 213 of two adjacent battery cells 21 are positioned far apart from each other, that is, the electrode terminals 213 are positioned towards the outside of the battery cell assembly 20, that is, the electrode terminals 213 are positioned towards the frame structure 11 of the housing 10.

[0146] Taking a battery cell assembly 20 comprising two battery cells 21 in the third direction as an example, the electrode terminals 213 of two adjacent battery cells 21 in the third direction are positioned far apart from each other. In this case, the distance between the electrode terminals 213 of the battery cells 21 arranged in the third direction and the connected electrical connection structure is relatively large, so as to achieve an electrical isolation effect through this distance, reducing the risk of short circuit between the electrode terminals 213 and the electrical connection structure, and also reducing the risk of high voltage discharge between the electrode terminals 213 of the battery cells 21 arranged in the third direction.

[0147] In this embodiment, the electrode terminals 213 of two adjacent battery cells 21 in the third direction are arranged opposite to each other to increase the distance between the electrode terminals 213 of adjacent battery cells 21 in the third direction, and to play a role in electrical isolation, reducing the risk of high voltage discharge, short circuit and other risks, and improving the safety performance of the battery device 100.

[0148] refer to Figures 5 to 7 In some embodiments, the battery cell 21 further includes a pressure relief structure 214 disposed on the housing 211, and the pressure relief structure 214 and the electrode terminal 213 are respectively located on different sides of the housing 211.

[0149] The pressure relief structure 214 refers to the structure in the battery cell 21 used to release internal pressure. The pressure relief structure 214 is used to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. The pressure relief structure 214 may include an explosion-proof valve, an explosion-proof diaphragm or other structures.

[0150] The pressure relief structure 214 is provided on the outer shell 211. The pressure relief structure 214 can be connected to the internal environment inside the outer shell 211 so that the pressure relief structure 214 can release the pressure inside the internal environment of the outer shell 211 to the accommodating space 14. The pressure relief structure 214 can be located on any side of the outer shell 211, that is, the pressure relief structure 214 can be provided on the end face or bottom face of the outer shell 211, or it can be provided on the side face of the outer shell 211.

[0151] The pressure relief structure 214 and the electrode terminal 213 are located on different sides of the housing 211. Since the electrode terminal 213 of the battery cell 21 is usually connected to electrical structures such as electrical connection structures, the pressure relief structure 214 and the electrode terminal 213 are located on different sides of the battery cell 21. In the event of thermal runaway of the battery cell 21, this arrangement can prevent the high-temperature and high-pressure flue gas released from the pressure relief structure 214 from directly contacting the electrode terminal 213 and its adjacent electrical connection structures, thereby reducing the damage to the electrical connection structure of the battery device 100 caused by the thermal runaway of the battery cell 21, and thus improving the stability and safety of the battery device 100.

[0152] Understandably, when the two electrode terminals 213 are located on the same first surface 2113 of the battery cell 21, the pressure relief structure 214 can be located on the other first surface 2113 of the battery cell 21, or on other sides of the battery cell 21. For example, the pressure relief structure 214 can be provided on the side of the battery cell 21 facing the top cover 12 or the bottom plate 13.

[0153] In this embodiment, the pressure relief structure 214 and the electrode terminal 213 are located on different sides of the battery cell 21 to reduce the impact of thermal runaway of a single battery cell 21 on the electrical connection structure and other battery cells 21, thereby reducing the risk of thermal runaway propagation caused by thermal runaway of a single battery cell 21 and improving the safety performance of the battery device 100.

[0154] refer to Figure 5 In some embodiments, the pressure relief structure 214 is located on one side of the battery cell 21 along the first direction.

[0155] The pressure relief structure 214 is located on one side of the battery cell 21 along the first direction. The top cover 12 and the bottom plate 13 are both arranged along the first direction. The pressure relief structure 214 is located on one side of the battery cell 21 along the first direction, that is, the pressure relief structure 214 is set towards the top cover 12 or the bottom plate 13.

[0156] Since the battery cells 21 are arranged along a third direction, the first surface 2113 is located on both sides of the battery cells 21 along the third direction, and the electrode terminals 213 are located on the first surface 2113 of the battery cells 21 facing outward; accordingly, when the pressure relief structure 214 and the electrode terminals 213 are located on different sides, the pressure relief structure 214 is located on one side of the battery cells 21 along the first direction. In the event of thermal runaway of the battery cells 21, this arrangement allows for a larger space after the high-temperature and high-pressure flue gas is discharged, so as to reduce the temperature and pressure of the high-temperature and high-pressure flue gas more quickly. This can reduce the damage that the high-temperature and high-pressure flue gas may cause to other structures in the battery device 100, and also reduce the damage that the high-temperature and high-pressure flue gas may cause to other battery cells 21.

[0157] For example, the pressure relief structure 214 is located on the side of the battery cell 21 facing the base plate 13. When the battery assembly 100 is installed in the vehicle 1000, the top cover 12 of the battery assembly 100 usually faces the passenger compartment of the vehicle 1000. Therefore, the pressure relief structure 214 is located on the side of the battery cell 21 facing the base plate 13. In the event of thermal runaway of the battery cell 21, this arrangement can reduce the risk of high-temperature and high-pressure flue gas entering the passenger compartment.

[0158] In this embodiment, since the battery cells 21 are arranged along a third direction, and the electrode terminals 213 of two adjacent battery cells 21 in the third direction are set away from each other along the third direction, the pressure relief structure 214 is arranged on one side of the battery cell 21 along the first direction to reduce the risk of thermal runaway of a single battery cell 21 damaging the pressure relief structure 214 of other adjacent battery cells 21 and improve the safety performance of the battery device 100.

[0159] refer to Figure 5 In some embodiments, the battery cell 21 is spaced apart from the inner surface of the housing 10 in the third-party direction.

[0160] The battery cell 21 is spaced apart from the inner surface of the housing 10 in the third direction, that is, the battery cell 21 is spaced apart from the frame structure 11, and a gap is formed between the battery cell 21 and the frame structure 11.

[0161] When the electrode terminals 213 of the battery cell 21 are arranged far apart from each other along a third direction, the gap reduces the risk of short circuit between the electrode terminals 213 of the battery cell 21 and the housing 10, and also reduces the risk of discharge from the electrode terminals 213 to the housing 10. At the same time, in the event of a collision with the battery device 100, the gap also provides space for the deformation of the housing 10, thereby reducing the risk of the housing 10 deforming and colliding with the electrode terminals 213 and the electrical connection structure, thus improving the stability and safety performance of the battery device 100.

[0162] Because the electrode terminals 213 of adjacent battery cells 21 on the third-side upward direction are positioned far apart from each other, that is, the electrode terminals 213 of battery cells 21 are positioned towards the frame structure 11, the electrode terminals 213 are easily damaged when the housing 10 is impacted. Accordingly, in this embodiment, the battery cells 21 are spaced apart from the inner surface of the housing 10 to form a buffer space between the battery cells 21 and the inner surface of the housing 10. When the battery device 100 is impacted, this arrangement can reduce the impact energy transmitted to the battery cells 21 and also reduce the risk of the housing 10 deforming and colliding with the battery cells 21, thereby improving the safety performance of the battery device 100. At the same time, the buffer space also serves as an electrical isolation, reducing the risk of short circuit between the battery cells 21 and the housing 10, further improving the safety performance of the battery device 100.

[0163] In some embodiments, a third insulating structure is provided between the battery cell 21 and the inner surface of the housing 10 in a third-party orientation.

[0164] The third insulating structure refers to a structural component in the battery device 100 that has insulating properties. The third insulating structure can be a structure made of insulating material or a surface insulating structure. The third insulating structure can include an insulating plate, an insulating film, an insulating coating or other insulating structures. The material of the third insulating structure can include plastic, rubber, ceramic or other insulating materials.

[0165] The third insulation structure is disposed between the inner surfaces of the battery cell 21 and the housing 10 along the third direction to reduce the risk of short circuit between the battery cell 21 and the housing 10 and discharge from the battery cell 21 to the housing 10, thereby improving the safety performance of the battery device 100.

[0166] The third insulation structure can be an independent structural component, or a coating, film, or other structure formed on the inner surface of the housing 10, or a coating, film, or other structure formed on the battery cell 21.

[0167] In this embodiment, a third insulating structure is provided between the battery cell 21 and the inner surface of the housing 10 to electrically isolate the battery cell 21 and the housing 10, thereby reducing the risk of short circuit between the battery cell 21 and the housing 10 and improving the safety performance of the battery device 100. At the same time, the third insulating structure can also absorb collision energy when the housing 10 is subjected to a collision, and can reduce the risk of the housing 10 deforming and directly squeezing the battery cell 21, further improving the safety performance of the battery device 100.

[0168] In some embodiments, in a third-party direction, a second protective structure is provided between the battery cell 21 and the inner surface of the housing 10, and the second protective structure is connected to the housing 10 or an adjacent battery cell 21.

[0169] The second protective structure refers to the structure in the battery device 100 used to protect the battery cell 21. The second protective structure may include a plate structure, a strip structure, a frame structure or other structures. The shape of the second protective structure may be a polygonal prism, a cylinder or other shapes. The number of second protective structures may be one, two or more. The material of the second protective structure may include metal, plastic or other materials.

[0170] The second protective structure is located between the inner surfaces of the battery cell assembly 20 and the housing 10. The second protective structure can be connected to the housing 10 or the battery cell assembly 20. The second protective structure can be connected to the connected battery cell 21 or housing 10 by welding, bonding or other means.

[0171] Because the electrode terminals 213 are located on the first surface 2113 of the housing 211, and the electrode terminals 213 of two adjacent battery cells 21 are positioned far apart from each other along the third direction (i.e., the electrode terminals 213 are positioned towards the frame structure 11), the second protective structure is positioned between the battery cell 21 and the housing 10 along the third direction. With this arrangement, in the event of a collision from the third direction to the battery device 100, the second protective structure can absorb a portion of the collision energy, thereby reducing the collision energy transmitted to the battery cell 21 and the electrode terminals 213 and the electrical connection structure. This improves the safety performance and connection stability of the electrode terminals 213 and the electrical connection structure. Simultaneously, in the event of a collision causing deformation of the housing 10, the second protective structure can also absorb a portion of the deformation of the housing 10, thereby reducing the risk of the battery cell 21 being subjected to compression deformation and further improving the safety performance of the battery device 100.

[0172] When a third insulating structure is provided between the battery cell 21 and the inner surface of the housing 10, the second protective structure may be located between the battery cell 21 and the third insulating structure, or the second protective structure may be located between the third insulating structure and the inner surface of the housing 10.

[0173] In this embodiment, a second protective structure is provided between the inner surfaces of the battery cell assembly 20 and the housing 10 to separate the battery cell 21 and the housing 10. In the event of a collision with the battery device 100, the second protective structure can buffer and absorb a portion of the collision energy received by the housing 10, thereby reducing the collision energy transmitted to the battery cell 21. At the same time, the deformation of the housing 10 caused by the collision can also act on the second protective structure first, thereby reducing the risk of the battery cell 21 being directly damaged by the pressure of the housing 10. The second protective structure is connected only to the housing 10 or the battery cell 21. In the event of a collision with the battery device 100, this arrangement can provide an obstacle to the transmission of collision energy and also provide space for the deformation of the housing 10, thereby better protecting the battery cell 21.

[0174] In some embodiments, the top cover 12 and / or the bottom plate 13 are connected to the battery cell 21.

[0175] The top cover 12 is connected to the battery cell 21. The top cover 12 can be connected to the battery cell 21 by bonding, welding, screwing or other means. Since the electrode terminals 213 are located on the first surface 2113 of the battery cell 21 arranged along the third direction, and the top cover 12 and the bottom plate 13 are arranged along the first direction, the top cover 12 is connected to the side of the battery cell 21 that does not have the electrode terminals 213. At this time, the battery cell 21 can provide support for the top cover 12 and improve the strength of the top cover 12. At the same time, the top cover 12 can also provide a limiting position and mounting base for the battery cell 21.

[0176] The base plate 13 is connected to the battery cell 21. The base plate 13 can be connected to the battery cell 21 by bonding, welding, screwing or other means. Since the electrode terminals 213 are located on the first surface 2113 of the battery cell 21 arranged along a third direction, and the base plate 13 is arranged along the first direction, the base plate 13 is connected to the side of the battery cell 21 that does not have electrode terminals 213. At this time, the battery cell 21 can provide support for the base plate 13 and improve the strength of the base plate 13. At the same time, the base plate 13 can also provide a limiting position and mounting base for the battery cell 21.

[0177] It is understandable that either the top cover 12 or the bottom plate 13 can be connected to the battery cell 21, or both the top cover 12 and the bottom plate 13 can be connected to the battery cell 21.

[0178] This embodiment provides some specific structures of the housing 10, so that the bottom plate 13 is connected to the battery cell 21, so as to support the battery cell 21 through the bottom plate 13 and provide support and fixing foundation for the battery cell 21, and the top cover 12 is connected to the battery cell 21, so as to provide support for the top cover 12 through the battery cell 21, thereby improving the strength and support performance of the top cover 12.

[0179] In some embodiments, in the first direction, the ratio between the size of the battery cell 21 and the size of the housing 10 ranges from 80% to 97%.

[0180] In the first direction, the ratio of the size of the battery cell 21 to the size of the housing 10 reflects the space occupied by the battery cell 21 in the first direction. This ratio is positively correlated with the energy density of the battery device 100. The larger the ratio, the larger the space occupied by the battery cell 21 in the first direction, the smaller the other spaces of the battery device 100 in the first direction, and the greater the energy density of the battery device 100.

[0181] In the first direction, the ratio of the size of the battery cell 21 to the size of the housing 10 ranges from 80% to 97%. For example, the ratio can be 80%, 83%, 86%, 89%, 92%, 95%, 97% or other values.

[0182] For example, in the first direction, the ratio of the size of the battery cell 21 to the size of the housing 10 can be 80%. In this case, there is a certain gap inside the battery device 100 in the first direction to facilitate the installation of other structures. At the same time, the top cover 12, the bottom plate 13, or other housing 10 structures can also have a larger size in the first direction to give the housing 10 higher strength.

[0183] For example, in the first direction, the ratio of the size of the battery cell 21 to the size of the housing 10 can be 88.5%. At this time, the energy density of the battery device 100 is relatively high. At the same time, there can be a certain gap inside the battery device 100 in the first direction, and the top cover 12, the bottom plate 13 or other housing 10 structures can also have a certain size in the first direction.

[0184] For example, in the first direction, the ratio of the size of the battery cell 21 to the size of the housing 10 can be 97%, in which case the energy density of the battery device 100 is higher.

[0185] This embodiment provides some dimensional relationships between the battery cells 21 and the housing 10 in the first direction, so that the battery cells 21 can occupy more space in the housing 10 in the first direction, thereby improving the energy density of the battery device 100.

[0186] In some embodiments, the size of the battery cell 21 in the second direction ranges from 10 mm to 50 mm; the size of the battery cell 21 in the first direction ranges from 60 mm to 150 mm; and the ratio of the size of the battery cell 21 in the third direction to the size of the battery cell 21 in the first direction is greater than or equal to 1.2.

[0187] The size of the battery cell 21 in the second direction ranges from 10mm to 50mm; for example, the size of the battery cell 21 in the second direction can be 10mm, 20mm, 30mm, 40mm, 50mm or other values.

[0188] Since the battery cells 21 are arranged along the second direction, when the housing space 14 of the box 10 is fixed, the smaller the size of the battery cells 21 in the second direction, the more battery cells 21 there are in the second direction; when the size of the battery cells 21 in the second direction is in the range of 10mm to 50mm, the number of battery cells 21 in the second direction is relatively large.

[0189] The size of the battery cell 21 in the first direction ranges from 60mm to 150mm; for example, the size of the battery cell 21 in the first direction can be 60mm, 80mm, 100mm, 120mm, 140mm, 150mm or other values.

[0190] The ratio of the dimension of the battery cell 21 in the third direction to its dimension in the first direction is greater than or equal to 1.2. When the dimension of the battery cell 21 in the first direction is in the range of 60mm to 150mm, the dimension of the battery cell 21 in the first direction is greater than or equal to 72mm. For example, the dimension of the battery cell in the third direction can be 72mm, 90mm, 110mm, 130mm, 150mm, 170mm, 180mm or other values.

[0191] The battery cell 21 has a smaller size in the second direction and a larger size in the third direction. That is, the battery cell 21 has a thin plate or blade-shaped structure. In this case, the side area of ​​the battery cell 21 facing the top cover 12 is larger. If the electrode terminals 213 are placed on the surface of the battery cell 21 facing the top cover 12, the space between the electrode terminals 213 is larger, which leads to a reduction in the utilization rate of the accommodating space 14 and a lower energy density of the battery device 100.

[0192] Accordingly, the electrode terminals 213 are disposed on the side of the battery cell 21 along a third direction to reduce the occupation of the height space of the battery device 100 by the electrode terminals 213, thereby improving the space utilization rate of the battery cell 21 in the height direction of the battery device 100; at the same time, the battery cell 21 can also provide a certain support for the housing 10 in the height direction to improve the strength of the battery device 100.

[0193] In some embodiments, the battery device 100 includes a housing 10, a battery cell assembly 20, and a first protective structure 30.

[0194] The housing 10 includes a top cover 12, a frame structure 11, and a bottom plate 13 arranged along the height direction Z of the battery device 100. The top cover 12 and the bottom plate 13 are respectively connected to the two sides of the frame structure 11 along the height direction Z of the battery device 100, and form a closed receiving space 14.

[0195] The battery cell assembly 20 is housed in the housing space 14. The battery cell assembly 20 includes multiple battery cells 21, wherein multiple battery cells 21 are arranged in the length direction X of the battery device 100 and two battery cells 21 are arranged in the width direction Y of the battery device 100. That is, the battery cell assembly 20 includes two rows of multiple battery cells 21.

[0196] The dimension of the battery cell 21 in the width direction Y of the battery device 100 is greater than or equal to 72mm, the dimension of the battery cell 21 in the length direction X of the battery device 100 ranges from 10mm to 50mm, and the dimension of the battery cell 21 in the height direction Z of the battery device 100 ranges from 60mm to 150mm; in the height direction Z of the battery device 100, the ratio of the dimension of the battery cell 21 to the dimension of the housing 10 ranges from 80% to 97%.

[0197] The battery cell 21 includes a housing 2112 and two electrode terminals 213 connected to the housing 2112. It may include two first surfaces 2113 arranged along the width direction Y of the battery device 100, and the electrode terminals 213 are disposed on the first surfaces 2113. The electrode terminals 213 of the two battery cells 21 are arranged opposite to each other in the width direction Y of the battery device 100. The pressure relief structure 214 is disposed on the other first surface 2113 of the housing 2112.

[0198] In the width direction Y of the battery device 100, a first protective structure 30 is provided between the battery cell 21 and the frame structure 11. The first protective structure 30 is provided with an exhaust groove 31, and the pressure relief structure 214 corresponds to the exhaust groove 31.

[0199] Secondly, embodiments of this application also provide an electrical device, including the battery device 100 provided in some embodiments of the first aspect.

[0200] In the battery device 100, the battery cell 21 can provide support for the top cover 12 and the bottom plate 13, and can improve the strength of the top cover 12 and the bottom plate 13; at the same time, it can improve the space utilization of the battery cell 21 in the height direction Z of the battery device 100, and improve the energy density of the battery device 100.

[0201] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure includes a top cover, a bottom plate, and a frame structure, wherein the frame structure forms an accommodating space that extends along a first direction, and the top cover and the bottom plate are connected to the frame structure along the first direction and cover the accommodating space. A battery cell assembly is housed in the housing space, the battery cell assembly comprising at least two battery cells arranged along a second direction; The battery cell includes a housing and two electrode terminals disposed on the housing. The housing has two first surfaces arranged along a third direction, and the two electrode terminals are disposed on the same first surface. The first direction, the second direction, and the third direction are all perpendicular to each other.

2. The battery device according to claim 1, characterized in that, The battery cell assembly also includes at least two battery cells arranged along the third direction; In the third direction, the electrode terminals of two adjacent battery cells are arranged opposite each other.

3. The battery device according to claim 2, characterized in that, The battery cell also includes a pressure relief structure disposed on the outer casing, and the pressure relief structure and the electrode terminals are respectively located on different sides of the outer casing.

4. The battery device according to claim 3, characterized in that, In the third direction, a first protective structure is also provided between the battery cell assembly and the inner surface of the housing.

5. The battery device according to claim 4, characterized in that, The pressure relief structure and the electrode terminals are respectively disposed on different surfaces of the first surface; The first protective structure has an exhaust groove on one side facing the adjacent first surface, and the exhaust groove is provided in correspondence with the pressure relief structure.

6. The battery device according to claim 4 or 5, characterized in that, The first protective structure is an insulating structural component; and / or In the third direction, a first insulating structure is provided between the battery cell assembly and the first protective structure.

7. The battery device according to any one of claims 2-5, characterized in that, In the third direction, a second insulating structure is provided between two adjacent battery cells to insulate and separate the electrode terminals on both sides of the second insulating structure.

8. The battery device according to claim 1, characterized in that, The battery cell assembly also includes at least two battery cells arranged along the third direction; In the third direction, the electrode terminals of two adjacent battery cells are positioned far apart from each other.

9. The battery device according to claim 8, characterized in that, The battery cell also includes a pressure relief structure disposed on the outer casing, and the pressure relief structure and the electrode terminals are respectively located on different sides of the outer casing.

10. The battery device according to claim 9, characterized in that, The pressure relief structure is located on one side of the battery cell along the first direction.

11. The battery device according to any one of claims 8-10, characterized in that, In the third direction, the battery cell is spaced apart from the inner surface of the housing.

12. The battery device according to any one of claims 8-10, characterized in that, In the third direction, a third insulating structure is provided between the battery cell and the inner surface of the casing.

13. The battery device according to any one of claims 8-10, characterized in that, In the third direction, a second protective structure is provided between the battery cell and the inner surface of the housing, and the second protective structure is connected to the housing or the adjacent battery cell.

14. The battery device according to any one of claims 1-5, characterized in that, The top cover and / or the bottom plate are connected to the battery cell.

15. The battery device according to any one of claims 1-5, characterized in that, In the first direction, the ratio between the size of the battery cell and the size of the housing ranges from 80% to 97%.

16. The battery device according to any one of claims 1-5, characterized in that, In the second direction, the size range of the battery cell is 10mm to 50mm; In the first direction, the size range of the battery cell is 60mm to 150mm; The ratio of the size of the battery cell in the third direction to the size of the battery cell in the first direction is greater than or equal to 1.

2.

17. An electrical appliance, characterized in that, The battery device includes any one of claims 1-16.

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