Battery device and electric device

Abstract

The application is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises: a box body; a battery monomer assembly comprising at least two battery monomers, the at least two battery monomers being arranged along a first direction, the battery monomer comprising a shell, the shell having a first wall, and an electrode terminal being arranged on the first wall; and a sampling assembly comprising a sampling structure and a first connecting piece; the length direction of the first connecting piece is parallel to the first direction, or the length direction of the first connecting piece is arranged at an acute angle with the first direction, so that the sampling structure is arranged adjacent to the electrode terminal. According to the battery device provided in the application, the battery monomers are arranged at least along the first direction, and the length direction of the first connecting piece is parallel to the first direction; in the case that the connecting area between the first connecting piece and the electrode terminal is unchanged, the size of the first connecting piece in a second direction can be reduced, so that the spacing between the sampling structure and the electrode terminal is reduced, and the space utilization 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 power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used 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 power battery applications, market demand is also constantly increasing.

[0003] In current battery devices, the distance between the sampling structure and the electrode terminals is relatively large, resulting in low space utilization above the battery cells, which can negatively impact the energy density of the battery device. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and a power supply device that can alleviate the problem of low space utilization of the battery device caused by the arrangement of the sampling structure and electrode terminals.

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

[0006] A housing; a battery cell assembly including at least two battery cells arranged along a first direction, each battery cell including a housing having a first wall and electrode terminals on the first wall; a sampling assembly disposed on one side of the first wall, the sampling assembly including a sampling structure and a first connector, at least a portion of the sampling structure being located on one side of the electrode terminals along a second direction, the second direction being at an angle to the first direction, one side of the first connector being connected to the sampling structure, and the other side of the first connector being connected to the electrode terminals; the length direction of the first connector being parallel to the first direction, or the length direction of the first connector being at an acute angle to the first direction, so that the sampling structure is disposed adjacent to the electrode terminals.

[0007] In the technical solution of this embodiment, the battery cells are arranged at least along the first direction, and the length direction of the first connector is parallel to the first direction. With the connection area between the first connector and the electrode terminal remaining unchanged, this arrangement can reduce the size of the first connector in the second direction, thereby reducing the distance between the sampling structure and the electrode terminal. This allows the sampling structure and the electrode terminal to be concentrated in a smaller space, thereby improving space utilization and reducing the negative impact of the sampling structure on the energy density of the battery device.

[0008] In some embodiments, the first connector includes two first sides and two second sides, the two first sides are arranged opposite to each other, the two second sides are arranged opposite to each other and connected to the two first sides respectively, the length of the first side is greater than the length of the second side, and the first side is parallel to the first direction or is arranged at an acute angle to the first direction.

[0009] The technical solution of this embodiment provides some specific structures for the first connector, such that the first connector includes a first side and a second side, and the length of the first side is greater than the length of the second side. At the same time, the first side is parallel to the first direction, so as to reduce the size of the first connector in the second direction, reduce the distance between the sampling structure and the electrode terminal, and enable the sampling structure and the electrode terminal to be concentrated in a smaller space, thereby reducing the negative impact of the sampling structure on the energy density of the battery device.

[0010] In some embodiments, the sampling structure includes a main body and a connecting portion connected to the main body, the connecting portion being further connected to a first connector; at least a portion of the main body is located on one side of the electrode terminal along a second direction, at least a portion of the connecting portion is located on one side of the electrode terminal along a first direction, and the first connector is connected to the connecting portion at a second side.

[0011] The technical solution of this embodiment provides some specific structures for the sampling structure, which includes a main body and a connecting part, and the connecting part is located on one side of the electrode terminal along the first direction, so as to reduce the size of the sampling structure in the second direction, thereby enabling the sampling structure and the electrode terminal to be concentrated in a smaller space and reducing the negative impact of the sampling structure on the energy density of the battery device.

[0012] In some embodiments, the sampling structure includes a main body and a connecting portion connected to the main body, the connecting portion being further connected to a first connector; at least a portion of the main body is located on one side of the electrode terminal along the second direction, at least a portion of the connecting portion is located on one side of the electrode terminal along the second direction, and the first connector is connected to the connecting portion at a first side.

[0013] The technical solution of this embodiment provides some specific structures for the sampling structure, so that the sampling structure can be connected to the connecting part when the length direction is parallel to the first direction.

[0014] In some embodiments, a through groove is provided on the main body, and the through groove is provided at the connection between the main body and the connecting part.

[0015] In the technical solution of this embodiment, a through groove is provided on the main body to absorb the deformation of the main body and the connecting part during the use of the battery device, thereby reducing the risk of tearing and deformation damage to the main body and the connecting part.

[0016] In some embodiments, the length direction of the through groove is parallel to the first direction, or the length direction of the through groove is set at an acute angle to the first direction.

[0017] In the technical solution of this embodiment, the length direction of the through groove is parallel to the first direction to reduce the size of the through groove in the second direction, thereby reducing the size of the sampling structure in the second direction. This allows the sampling structure and electrode terminals to be concentrated in a smaller space, reducing the negative impact of the sampling structure on the energy density of the battery device.

[0018] In some embodiments, the number of through slots is at least two, and each through slot divides the main body into a deformable portion; the deformable portion includes a straight portion and an arcuate portion connected to the straight portion, and the extension direction of the straight portion is parallel to the first direction.

[0019] In the technical solution of this embodiment, a deformable part is formed on the main body of the through groove, and the deformable part includes a straight part and an arc-shaped part, so that the deformable part can deform or displace in different directions, thereby adapting to the movement of the connecting part in various directions; at the same time, the extension direction of the straight part is parallel to the first direction to adapt to the length direction of the through groove and reduce the size of the sampling structure in the second direction.

[0020] In some embodiments, the housing includes a first housing and a second housing, the second housing being fastened to the first housing to form a first receiving cavity, and a single battery cell being received in the first receiving cavity; the first housing has a second wall facing a first wall, and the second wall has a protrusion protruding in a direction away from the first receiving cavity, the length direction of the protrusion being parallel to a first direction, and the protrusion forming a second receiving cavity on the side facing the first receiving cavity, the second receiving cavity being used to receive at least a portion of the electrode terminal, the first connector, and the sampling structure.

[0021] In this embodiment, the second wall of the housing is provided with a protrusion, and the protrusion is opposite to the electrode terminal and the sampling structure, so that the second wall can better adapt to the shape of the battery cell and match the shape of the battery cell, thereby reducing the empty space in the battery device, improving the space utilization rate inside the housing, and improving the energy density of the battery device.

[0022] In some embodiments, the protrusion includes a first protrusion and a second protrusion connected to the first protrusion, the first protrusion corresponding to an electrode terminal, and the second protrusion corresponding to at least a portion of the first connector and the sampling structure; the distance between the first protrusion and the first wall is greater than the distance between the second protrusion and the first wall.

[0023] In this embodiment, the protrusion includes a first protrusion and a second protrusion, so that the first protrusion and the second protrusion can be adapted to the electrode terminal and the sampling component respectively, thereby improving the space utilization of the battery device.

[0024] In some embodiments, an insulating layer is provided on the side of the protrusion facing the receiving cavity, and the insulating layer at least covers the first protrusion.

[0025] In the technical solution of this embodiment, an insulating layer is provided on the side of the protrusion facing the receiving cavity to reduce the risk of short circuit and outward discharge caused by the contact of the electrode terminals, sampling components and other structures with the housing. The insulating layer at least covers the first protrusion to reduce the risk of short circuit between the electrode terminals and the housing.

[0026] In some embodiments, the second wall further includes a flat portion connected to the protrusion, the flat portion having a connecting structure between it and the first wall, and the flat portion being connected to the first wall via the connecting structure.

[0027] In this embodiment, the second wall further includes a flat portion, which is connected to the first wall to improve the strength of the second wall. Because the distance between the sampling structure and the electrode terminal is close, the area on the first wall that can be connected to the second wall is increased, so that the flat portion connected to the first wall can better improve the strength of the second wall.

[0028] In some embodiments, the sampling assembly further includes a bracket, one side of which is connected to the first wall and the other side of which is connected to the sampling structure, with a portion of the bracket opposite to the protrusion.

[0029] In the technical solution of this embodiment, the sampling component includes a bracket to support the sampling structure.

[0030] In some embodiments, the connecting structure is an insulating structure and the bracket is an insulating structural member; in the second direction, a portion of the bracket extends between the flat portion and the first wall, and the bracket and the connecting structure respectively cover different parts of the first wall.

[0031] In this embodiment, the connection structure is made into an insulating structure to reduce the risk of short circuit between the battery cell and the casing. At the same time, part of the bracket extends between the second wall and the first wall to separate the corresponding first wall and the second wall, further reducing the risk of short circuit between the battery cell and the casing.

[0032] In some embodiments, the electrode terminal has a first connection area and a second connection area, the first connection area and the second connection area are arranged along a second direction, and the first connector is connected to the sampling structure in the first connection area; the battery device further includes a second connector, the two ends of the second connector are respectively connected to adjacent electrode terminals of two adjacent battery cells, and the second connector is connected to the electrode terminal in the second connection area.

[0033] The technical solution of this embodiment provides a structure for some electrode terminals, such that the electrode terminals include a first connection area and a second connection area arranged along a second direction, so that the first connector and the second connector are connected to the electrode terminals at different positions respectively.

[0034] Secondly, some embodiments of this application also provide an electrical device, including the battery device provided in some embodiments of the first aspect.

[0035] 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

[0036] 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:

[0037] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0038] Figure 2 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 1 ;

[0039] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0040] Figure 4 A top view of the internal structure of a battery device provided in some embodiments of this application;

[0041] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0042] Figure 6 for Figure 5 A magnified view of a portion of point B in the middle;

[0043] Figure 7 for Figure 5 A magnified view of a portion of point C in the middle;

[0044] Figure 8 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 2 ;

[0045] Figure 9 Partial cross-sectional view of a battery device provided in some embodiments of this application. Figure 1 ;

[0046] Figure 10Partial cross-sectional view of a battery device provided in some embodiments of this application. Figure 2 ;

[0047] Figure 11 Partial cross-sectional view of a battery device provided in some embodiments of this application. Figure 3 .

[0048] The markings in the diagram mean:

[0049] 1000, vehicles;

[0050] 100. Battery device;

[0051] 10. Box body; 101. First receiving cavity; 11. First box body; 111. Second wall; 1111. Protrusion; 1111a. First protrusion; 1111b. Second protrusion; 112. Flat part; 12. Second box body;

[0052] 20. Battery cell; 21. Casing; 211. First wall; 212. Housing; 213. End cap; 22. Electrode assembly; 23. Electrode terminal; 231. First connection area; 232. Second connection area;

[0053] 30. Sampling component; 31. Sampling structure; 311. Main body; 3111. Through groove; 3112. Deformation part; 3112a. Straight part; 3112b. Arc-shaped part; 312. Connecting part; 32. First connecting piece; 321. First side; 322. Second side; 33. Support;

[0054] 40. Insulation layer;

[0055] 50. Second connector;

[0056] 60. Connection structure;

[0057] 200. Motor;

[0058] 300. Controller. Detailed Implementation

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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).

[0065] 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.

[0066] 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.

[0067] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used 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 power battery applications, market demand is also constantly increasing.

[0068] In the battery device, the sampling structure is connected to the electrode terminals through connectors to collect state information such as voltage and temperature of the electrode cells. In order for the connectors to be stably connected to the electrode terminals and to be able to collect state information of the electrode cells through the electrode terminals more accurately, the connectors and electrode terminals have a minimum connection area requirement, the connectors also have a minimum current flow area requirement, that is, the connectors have a minimum volume requirement.

[0069] In current battery cells, the sampling structure is usually located on one side of the electrode terminal along the width direction of the battery cell, and the connector is usually a long strip structure, so that the distance between the sampling structure and the electrode terminal is usually far. It is also difficult to accommodate other structures in the distance between the sampling structure and the electrode terminal, resulting in low space utilization and negatively impacting the energy density of the battery device.

[0070] Based on the above considerations, in order to alleviate the problem of low space utilization of the battery device caused by the arrangement of the sampling structure and the electrode terminals, this application provides a battery device in which each battery cell is arranged along a first direction, a first connector is provided, and the sampling structure is arranged along a second direction on one side of the electrode terminals. The sampling structure and the electrode terminals are connected by the first connector, and the length direction of the first connector is parallel to the first direction or at an acute angle to the first direction.

[0071] In such a battery device, while keeping the connection area between the first connector and the electrode terminal constant, the size of the first connector in the second direction can be reduced, and the distance between the sampling structure and the electrode terminal can be reduced, so that the sampling structure and the electrode terminal can be concentrated in a smaller space, thereby improving space utilization and reducing the negative impact of the sampling structure on the energy density of the battery device.

[0072] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application.

[0077] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via busbars.

[0078] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20.

[0079] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 together. As an example, a battery module can also be formed by bundling multiple battery cells 20 together with cable ties.

[0080] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more individual battery cells housed within the housing 10.

[0081] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0082] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0083] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0084] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to accommodate the battery cell assembly.

[0085] 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.

[0086] refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. A battery cell 20 refers to the smallest unit that makes up a battery. The battery cell 20 can be a rechargeable battery, meaning that after the battery cell 20 has been discharged, its active materials can be activated by charging and it can continue to be used.

[0087] The battery cell 20 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.

[0088] As shown in the figure, the battery cell 20 includes a housing 21, an electrode assembly 22, and other functional components. The housing 21 includes a shell 212 and an end cap 213.

[0089] End cap 213 refers to a component that covers the opening of housing 212 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 213 can be adapted to the shape of housing 212 to fit it. Optionally, end cap 213 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 213 is not easily deformed under pressure and impact, giving battery cell 20 higher structural strength and improved safety performance. Functional components such as electrode terminals 23 can be provided on end cap 213. Electrode terminals 23 can be used for electrical connection with electrode assembly 22 for outputting or inputting electrical energy into battery cell 20. In some embodiments, end cap 213 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 213 can also be various, 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 213. The insulating element can be used to isolate the electrical connection portion 312 within the housing 212 from the end cap 213 to reduce the risk of short circuit. For example, the insulating element may be made of plastic, rubber, etc.

[0090] The housing 212 is a component used to cooperate with the end cap 213 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 22, electrolyte, and other components. The housing 212 and the end cap 213 can be independent components. An opening can be provided on the housing 212, and the end cap 213 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 213 and the housing 212 can be integrated. Specifically, the end cap 213 and the housing 212 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 212, the end cap 213 closes the housing 212. The housing 212 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 212 can be determined according to the specific shape and size of the electrode assembly 22. The material of the housing 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0091] Electrode assembly 22 is the component in the battery cell 20 where electrochemical reactions occur. The casing 212 may contain one or more electrode assemblies 22. The electrode assembly 22 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 22, 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 23 to form a current loop.

[0092] Firstly, reference Figures 4 to 6 This application provides a battery device 100, including a housing 10, a battery cell assembly, and a sampling assembly 30. The battery cell assembly includes at least two battery cells 20 arranged along a first direction. Each battery cell 20 includes a housing 21 with a first wall 211 and electrode terminals 23 on the first wall 211. The sampling assembly 30 is located on one side of the first wall 211 and includes a sampling structure 31 and a first connector 32. At least a portion of the sampling structure 31 is located along a second direction on one side of the electrode terminals 23, with the second direction forming an angle with the first direction. One side of the first connector 32 is connected to the sampling structure 31, and the other side of the first connector 32 is connected to the electrode terminals 23. The length direction of the first connector 32 is parallel to the first direction, or the length direction of the first connector 32 forms an acute angle with the first direction, so that the sampling structure 31 is located adjacent to the electrode terminals 23.

[0093] In the figure, the X-axis is the length direction of the battery device 100 and the thickness direction of the battery cell 20; the Y-axis is the width direction of the battery device 100 and the width direction of the battery cell 20; and the Z-axis is the height direction of the battery device 100 and the height direction of the battery cell 20.

[0094] The housing 10 refers to the structure in the battery device 100 that provides a space for housing the battery cell 20. The housing 10 can be cylindrical, prismatic, or other shapes, and the material of the housing 10 can include metal, plastic, or other materials.

[0095] A battery cell 20 refers to the smallest unit that makes up the battery device 100. A battery cell 20 can be a cylindrical structure, a prismatic structure, a sheet structure, or other shapes. A battery cell assembly includes at least two battery cells 20, and the at least two battery cells 20 are connected in series, in parallel, or in a mixed connection through a busbar component.

[0096] At least two battery cells 20 are arranged along a first direction, that is, the first direction is the arrangement direction of the battery cells 20; when there are multiple battery cells 20, the multiple battery cells 20 can all be arranged along the first direction, or the multiple battery cells 20 can have other arrangement directions different from the first direction.

[0097] For example, the first direction can be the length direction X of the battery device 100. The larger side of two adjacent battery cells 20 arranged along the first direction is arranged opposite each other. At this time, the two electrode terminals 23 of the same battery cell 20 are arranged in a direction other than the first direction.

[0098] The housing 21 refers to the structure used to form the internal environment of the battery cell 20. The internal environment formed by the housing 21 can be used to house the electrode assembly 22, electrolyte, and other structures. For example, the housing 21 may include a shell 212 and an end cap 213.

[0099] The first wall 211 refers to the structure in the outer shell 21 used to form the internal environment. The first wall 211 can be an end cap 213, or a side wall or bottom wall of the shell 212. The shape of the first wall 211 can be square, circular or other shapes. The shape of the first wall 211 can also be set according to the shape of the outer shell 21. The material of the first wall 211 can include metal, plastic or other materials.

[0100] Electrode terminal 23 refers to the structure in battery cell 20 used for outputting or inputting electrical energy. Electrode terminal 23 can be used for electrical connection with electrode assembly 22. Electrode terminal 23 can be a cylindrical structure, a prismatic structure, or a structure of the shape thereof. Electrode terminal 23 is disposed on the first wall 211. A part of electrode terminal 23 can extend outside the first wall 211 to facilitate connection with sampling assembly 30 or other structures. Another part of electrode terminal 23 can extend outside the outer casing 21 to facilitate connection with electrode assembly 22 or other structures to transmit electrical energy.

[0101] The sampling component 30 refers to the structure in the battery device 100 used to collect state information of the battery cell 20 or other structures. When the sampling component 30 collects the state information of the battery cell 20, the sampling component 30 can collect the voltage, temperature or other state information of the battery cell 20. The sampling component 30 can also send the collected state information to the control device in the battery device 100. The sampling component 30 is located on one side of the first wall 211 so that the sampling component 30 can be connected to the electrode terminal 23. The sampling component 30 can be directly connected to the first wall 211 by bonding, screwing or other means, or the sampling component 30 can be indirectly connected to the first wall 211 through an intermediate structure.

[0102] The sampling structure 31 refers to the structure in the sampling component 30 used to transmit status information. The sampling structure 31 may include a wire harness, a flexible printed circuit (FPC), or other structures capable of transmitting status information. The status information transmitted by the sampling structure 31 may be an electrical signal or other signals. The sampling structure 31 may be a square sheet structure, a cylindrical strip structure, or other shaped structural components. The sampling structure 31 may be directly connected to the first wall 211 by bonding, screwing, or other means. The sampling component 30 may also be indirectly connected to the first wall 211 through an intermediate structure.

[0103] At least a portion of the sampling structure 31 is disposed on one side of the electrode terminal 23 along the second direction. That is, the sampling structure 31 can be completely located on one side of the electrode terminal 23 along the second direction, or it can be only partially located on one side of the electrode terminal 23 along the second direction. The second direction refers to a direction different from the first direction. The second direction can be perpendicular to the first direction or it can be set at an angle to the first direction. For example, the second direction is perpendicular to the first direction, and the two electrode terminals 23 of the same battery cell 20 are arranged along the second direction. The sampling structure 31 is located on one side of the electrode terminal 23 along the second direction, and the length direction of the sampling structure 31 is parallel to the first direction. In this case, the sampling structure 31 can transmit the status information of multiple battery cells 20.

[0104] The first connector 32 refers to the structure in the sampling assembly 30 used to transmit the status information of the electrode terminal 23 to the sampling structure 31. The shape of the first connector 32 can be circular, rectangular, trapezoidal or other shapes. One end of the first connector 32 is connected to the electrode terminal 23 and the other end of the first connector 32 is connected to the sampling structure 31. The first connector 32 is used to transmit the status information of the electrode terminal 23 to the sampling structure 31. The first connector 32 can transmit voltage or other status information. The first connector 32 can be connected to the electrode terminal 23 by welding, bonding or other means. The first connector 32 can be connected to the sampling structure 31 by welding, bonding or other means.

[0105] The first connector 32 has a length direction and a width direction different from the length direction. The dimension of the first connector 32 in its length direction is greater than the dimension of the first connector 32 in its width direction. The length direction of the first connector 32 is parallel to the first direction, or the length direction of the first connector 32 is set at an acute angle to the first direction, that is, the dimension of the first connector 32 in the first direction is greater than the dimension of the first connector 32 in the second direction.

[0106] Since the sampling structure 31 and the electrode terminal 23 are located on both sides of the first connector 32, and the sampling structure 31 is located on one side of the electrode terminal 23 along the second direction, this arrangement can shorten the size of the first connector 32 in the second direction and shorten the distance between the sampling structure 31 and the corresponding electrode terminal 23, thereby enabling the sampling structure 31 to be adjacent to the electrode terminal 23 and reducing the space occupied by the electrode terminal 23 and the sampling structure 31.

[0107] For the first wall 211, this arrangement can reduce the space occupied by the electrode terminals 23 and the sampling components 30 on the first wall 211, and free up more space on the first wall 211 for the installation and arrangement of other structures.

[0108] In this embodiment, the battery cells 20 are arranged at least along the first direction, and the length direction of the first connector 32 is parallel to the first direction. With the connection area between the first connector 32 and the electrode terminal 23 remaining unchanged, this arrangement can reduce the size of the first connector 32 in the second direction, thereby reducing the distance between the sampling structure 31 and the electrode terminal 23. This allows the sampling structure 31 and the electrode terminal 23 to be concentrated in a smaller space, thereby improving space utilization and reducing the negative impact of the sampling structure 31 on the energy density of the battery device 100.

[0109] refer to Figures 4 to 6 In some embodiments, the first connector 32 includes two first sides 321 and two second sides 322. The two first sides 321 are arranged opposite to each other, and the two second sides 322 are arranged opposite to each other and connected to the two first sides 321 respectively. The length of the first side 321 is greater than the length of the second side 322. The first side 321 is parallel to the first direction or is arranged at an acute angle to the first direction.

[0110] Both the first side 321 and the second side 322 refer to the edges of the first connector 32. There are two first side 321s, and the two first side 321s are arranged opposite each other, that is, the two first side 321s are located on opposite sides of the first connector 32. There are two second side 322s, and the two second side 322s are arranged opposite each other, and the two second side 322s are located on opposite sides of the first connector 32. The two second side 322s are connected to the two first side 321s, that is, the second side 322s are adjacent to the connected first side 321s. Depending on the shape of the first connector 32, the first side 321 can be perpendicular to the second side 322, and the first side 321 and the second side 322 can also form an acute angle or an obtuse angle.

[0111] The length of the first side 321 is greater than the length of the second side 322, meaning the extension direction of the first side 321 is the length direction of the first connector 32. When the length direction of the first connector 32 is parallel to the first direction, the first side 321 is parallel to the first direction; when the length direction of the first connector 32 forms an acute angle with the first direction, the first side 321 forms an acute angle with the first direction. In this case, the second side 322 can be parallel to the second side or form an acute angle with the second direction, meaning the size of the first connector 32 in the second direction is smaller, thereby reducing the distance between the sampling structure 31 and the electrode terminal 23.

[0112] Depending on the relative positions of the first connector 32 and the sampling structure 31, the first connector 32 can be connected to the sampling structure 31 at the first side 321, or the first connector 32 can be connected to the sampling structure 31 at the second side 322.

[0113] Understandably, when the first connector 32 includes two first sides 321 and two second sides 322, the first connector 32 can be a rectangular structure, or a pentagonal structure, a hexagonal structure, or other polygonal structure.

[0114] This embodiment provides a specific structure for the first connector 32, which includes a first side 321 and a second side 322, and the length of the first side 321 is greater than the length of the second side 322. At the same time, the first side 321 is parallel to the first direction to reduce the size of the first connector 32 in the second direction, reduce the distance between the sampling structure 31 and the electrode terminal 23, and enable the sampling structure 31 and the electrode terminal 23 to be concentrated in a smaller space, thereby reducing the negative impact of the sampling structure 31 on the energy density of the battery device 100.

[0115] refer to Figures 4 to 6 In some embodiments, the sampling structure 31 includes a main body 311 and a connecting portion 312 connected to the main body 311. The connecting portion 312 is also connected to the first connector 32. At least a portion of the main body 311 is located on one side of the electrode terminal 23 along the second direction, and at least a portion of the connecting portion 312 is located on one side of the electrode terminal 23 along the first direction. The first connector 32 is connected to the connecting portion 312 at the second side 322.

[0116] The connecting part 312 refers to the structure in the sampling structure 31 used to connect with the first connecting member 32. The shape of the connecting part 312 can be rectangular, circular, trapezoidal or other shapes. One end of the first connecting member 32 is connected to the electrode terminal 23, and the other end of the first connecting member 32 is connected to the connecting part 312. The first connecting member 32 can be connected to the connecting part 312 by welding, bonding or other means to transmit electrical signals or other signals to the connecting part 312.

[0117] The main body 311 refers to the structure in the sampling structure 31 that is connected to the connecting part 312 and transmits signals. The main body 311 can be a square sheet structure, a cylindrical strip structure, or other shaped structural components. One end of the connecting part 312 is connected to the first connecting member 32, and the other end of the connecting part 312 is connected to the main body 311. The connecting part 312 can be connected to the main body 311 by welding, bonding, or other means. The connecting part 312 can also be integrally formed with the main body 311. The first connecting member 32 can transmit electrical signals to the main body 311 through the connecting part 312.

[0118] At least a portion of the main body 311 is located on one side of the electrode terminal 23 along the second direction. That is, the main body 311 can be completely located on one side of the electrode terminal 23 along the second direction, or the main body 311 can be only partially located on one side of the electrode terminal 23 along the second direction. This arrangement allows the length direction of the main body 311 to be parallel to the first direction or to be set at an acute angle to the first direction. In this case, the main body 311 can be connected to the electrode terminals 23 of different battery cells 20 through different connecting portions 312 to transmit the status information of multiple battery cells 20.

[0119] At least a portion of the connecting portion 312 is located on one side of the electrode terminal 23 along the first direction. Depending on the shape of the connecting portion 312, the connecting portion 312 may be located only partially on one side of the electrode terminal 23 along the first direction, or the connecting portion 312 may be located entirely on one side of the electrode terminal 23 along the first direction. When at least two battery cells 20 are arranged along the first direction, at least a portion of the connecting portion 312 is located between adjacent electrode terminals 23 of two adjacent battery cells 20.

[0120] The first connector 32 is connected to the sampling structure 31 at the second side 322. Since the first side 321 of the first connector 32 is parallel to the first direction or is set at an angle to the first direction, the two second sides 322 of the first connector 32 are arranged along the first direction, so that the first connector 32 is connected to the sampling structure 31 at the second side 322, so that one side of the first connector 32 along the first direction can be connected to the connecting part 312.

[0121] Understandably, when the first connector 32 is connected to the connector 312 at the second side 322, a portion of the first side 321 can also extend to the connector 312.

[0122] This embodiment provides some specific structures for the sampling structure 31, such that the sampling structure 31 includes a main body 311 and a connecting part 312, and the connecting part is located on one side of the electrode terminal 23 along the first direction, so as to reduce the size of the sampling structure 31 in the second direction, thereby enabling the sampling structure 31 and the electrode terminal 23 to be concentrated in a smaller space, reducing the negative impact of the sampling structure 31 on the energy density of the battery device 100.

[0123] In some embodiments, the sampling structure 31 includes a main body 311 and a connecting portion 312 connected to the main body 311. The connecting portion 312 is also connected to a first connector 32. At least a portion of the main body 311 is located on one side of the electrode terminal 23 along the second direction, and at least a portion of the connecting portion 312 is located on one side of the electrode terminal 23 along the second direction. The first connector 32 is connected to the connecting portion 312 at a first side 321.

[0124] At least a portion of the connecting portion 312 is located on one side of the electrode terminal 23 along the second direction. Depending on the shape of the connecting portion 312, the connecting portion 312 may be located only partially on one side of the electrode terminal 23 along the second direction, or the connecting portion 312 may be located entirely on one side of the electrode terminal 23 along the second direction. When the sampling structure 31 is located on one side of the electrode terminal 23 along the second direction, at least a portion of the connecting portion 312 is located between the main body portion 311 and the electrode terminal 23.

[0125] The first connector 32 is connected to the sampling structure 31 at the first side 321. Since the second side 322 of the first connector 32 is parallel to the second direction or at an angle to the second direction, the two first sides 321 of the first connector 32 are arranged along the second direction, so that the first connector 32 is connected to the sampling structure 31 at the first side 321, so that one side of the first connector 32 along the second direction can be connected to the connecting part 312.

[0126] This embodiment provides some other specific structures for the sampling structure 31, so that the sampling structure 31 can be connected to the connecting part 312 when the length direction is parallel to the first direction.

[0127] refer to Figures 4 to 7 In some embodiments, a through groove 3111 is provided on the main body 311, and the through groove 3111 is provided at the connection between the main body 311 and the connecting part 312.

[0128] The through groove 3111 refers to the groove structure that passes through the main body 311. The through groove 3111 may include a long strip-shaped groove structure that extends in a straight line, or an arc-shaped groove structure or a groove structure of other shapes. On the cross section perpendicular to the extension direction of the through groove 3111, the cross section shape of the through groove 3111 may be square, trapezoidal or other shapes. The number of through grooves 3111 may be one, two or more.

[0129] Because the battery cell 20 expands and contracts during charging and discharging, and the connecting part 312 is indirectly connected to the electrode terminal 23 through the first connecting member 32, the connecting part 312 will be displaced as the battery cell 20 expands and contracts during charging and discharging. At the same time, the displacement of the connecting part 312 will cause deformation of the connection part 312 and the main body 311. That is, there is a risk of tearing or deformation at the connection part 312 and the main body 311.

[0130] Accordingly, a through groove 3111 is provided at the connection between the main body 311 and the connecting part 312, so that the space formed by the through groove 3111 provides space for the movement of the connecting part 312, and the space formed by the through groove 3111 absorbs the deformation of the connection between the connecting part 312 and the main body 311, thereby reducing the risk of tearing or deformation at the connection between the connecting part 312 and the main body 311 and improving the stability of the sampling structure 31.

[0131] The through groove 3111 can also reduce the restriction on the movement of the connecting part 312 by the main body 311, so that the connecting part 312 can move with the first connecting member 32, thereby reducing the failure of the connection between the first connecting member 32 and the connecting part 312, and helping to improve the stability of the connection between the first connecting member 32 and the connecting part 312.

[0132] In this embodiment, a through groove 3111 is provided on the main body 311 so as to absorb the deformation of the main body 311 and the connecting part 312 during the use of the battery device 100, thereby reducing the risk of tearing and deformation damage to the main body 311 and the connecting part 312.

[0133] refer to Figures 4 to 7 In some embodiments, the length direction of the through groove 3111 is parallel to the first direction, or the length direction of the through groove 3111 is set at an acute angle to the first direction.

[0134] In the case of a straight groove structure, the length direction of the groove 3111 is its extension direction; in the case of a curved groove structure or a bent groove structure, the groove 3111 extends along a reference straight line, and the length direction of the groove 3111 is the direction of the reference straight line of the groove 3111. The dimension of the groove 3111 in the length direction is greater than the dimension of the groove 3111 in other directions.

[0135] The length direction of the through groove 3111 is parallel to the first direction, or the length direction of the through groove 3111 is set at an acute angle to the first direction. That is, the size of the through groove 3111 in the first direction is larger than the size of the through groove 3111 in the second direction, so that the space required by the through groove 3111 in the second direction is smaller, thereby reducing the size of the main body 311 in the second direction. This allows the sampling structure 31 and the electrode terminal 23 to be concentrated in a smaller space, reducing the negative impact of the sampling structure 31 on the energy density of the battery device 100.

[0136] In this embodiment, the length direction of the through groove 3111 is parallel to the first direction to reduce the size of the through groove 3111 in the second direction, thereby reducing the size of the sampling structure 31 in the second direction. This allows the sampling structure 31 and the electrode terminal 23 to be concentrated in a smaller space, reducing the negative impact of the sampling structure 31 on the energy density of the battery device 100.

[0137] refer to Figures 4 to 7 In some embodiments, the number of through slots 3111 is at least two, and each through slot 3111 divides the main body 311 into a deformable portion 3112; the deformable portion 3112 includes a straight portion 3112a and an arc-shaped portion 3112b connected to the straight portion 3112a, and the extending direction of the straight portion 3112a is parallel to the first direction.

[0138] The number of through slots 3111 is at least two, that is, the number of through slots 3111 can be two, three or more; at least two through slots 3111 can separate deformable parts 3112 on the main body 311, that is, deformable parts 3112 are part of the main body 311. Since the through slots 3111 are provided at the connection between the connecting part 312 and the main body 311, the deformable parts 3112 can move or deform synchronously during the movement of the connecting part 312. At the same time, the through slots 3111 provide space for the movement or deformation of the deformable parts 3112, so that the deformation of the deformable parts 3112 can absorb deformation energy and buffer.

[0139] The deformable part 3112 can also guide the deformation direction of the main body 311 as the connecting part 312 deforms, so as to limit and control the position of the moving or deforming part 312 on the main body 311, and make the moving and deforming part 312 less likely to affect the entire main body 311.

[0140] The straight portion 3112a refers to the straight structure in the deformable portion 3112, and the curved portion 3112b refers to the curved structure in the deformable portion 3112. One end of the curved portion is connected to the straight portion 3112a. Since the deformable portion 3112 is formed by the through groove 3111 separating the main body portion 311, the straight portion 3112a and the curved portion 3112b are integrally connected. Depending on the number and shape of the through groove 3111, the number of straight portions 3112a can be one, two or more, and the number of curved portions 3112b can be one, two or more.

[0141] The length of the deformable portion 3112 is mainly positively correlated with the length of the straight portion 3112a. Therefore, the extension direction of the straight portion 3112a is parallel to the first direction, so that the size of the deformable portion 3112 in the first direction is larger, thereby reducing the size of the deformable portion 3112 in the second direction and making the space required by the deformable portion 3112 in the second direction smaller. This reduces the size of the main body portion 311 in the second direction, allowing the sampling structure 31 and the electrode terminal 23 to be concentrated in a smaller space, thereby reducing the negative impact of the sampling structure 31 on the energy density of the battery device 100.

[0142] For example, the deformable part 3112 includes three straight parts 3112a arranged sequentially along the second direction, and the deformable part 3112 also includes two arc-shaped parts 3112b. The three straight parts 3112a and the two arc-shaped parts 3112b are connected in sequence to form an S-shaped structure.

[0143] In this embodiment, the through groove 3111 forms a deformable portion 3112 on the main body 311, and the deformable portion 3112 includes a straight portion 3112a and an arc-shaped portion 3112b, so that the deformable portion 3112 can deform or displace in different directions, thereby adapting to the movement of the connecting portion 312 in various directions; at the same time, the extension direction of the straight portion 3112a is parallel to the first direction to adapt to the length direction of the through groove 3111 and reduce the size of the sampling structure 31 in the second direction.

[0144] refer to Figure 8 In some embodiments, the housing 10 includes a first housing 11 and a second housing 12. The second housing 12 is fastened to the first housing 11 and forms a first receiving cavity 101, in which the battery cell 20 is received. The first housing 11 has a second wall 111 facing the first wall 211. The second wall 111 is provided with a protrusion 1111 protruding in a direction away from the first receiving cavity 101. The length direction of the protrusion 1111 is parallel to the first direction. The protrusion 1111 forms a second receiving cavity on the side facing the first receiving cavity 101. The second receiving cavity is used to receive at least a portion of the electrode terminal 23, the first connector 32, and the sampling structure 31.

[0145] The first housing 11 and the second housing 12 refer to parts of the structure of the housing 10. The first housing 11 and the second housing 12 can be interlocked to form a first receiving cavity 101 inside the housing 10 to accommodate the battery cell 20. The second housing 12 can be a hollow structure with one end open, and the first housing 11 can be a plate-like structure. The first housing 11 covers the open side of the second housing 12 so that the first housing 11 and the second housing 12 together define the first receiving cavity 101. Alternatively, the first housing 11 and the second housing 12 can both be hollow structures with one side open, and the open side of the first housing 11 covers the open side of the second housing 12. The housing 10 formed by the first housing 11 and the second housing 12 can be cylindrical, prismatic, or other shapes. The first receiving cavity 101 can be a cylindrical space, a prismatic space, or other spatial structure. The shape of the first receiving cavity 101 can also be set according to the shape of the first housing 11 and the second housing 12.

[0146] The second wall 111 refers to the structure in the first box 11 that is opposite to the first wall 211. When the first box 11 is a plate-shaped structure, the second wall 111 can be the main structure of the first box 11. When the first box 11 is a hollow structure with one end open, the second wall 111 can be the top plate of the first box 11. Depending on the shape of the box 10, the second wall 111 can be square, round or other shapes. Depending on the material of the box 10, the material of the second wall 111 can include metal, plastic or other materials.

[0147] The protrusion 1111 refers to the portion of the second wall 111 that protrudes away from the first receiving cavity 101. The protrusion 1111 can form a second receiving cavity on the side of the second wall 111 facing the first receiving cavity 101. Depending on the shape of the protrusion 1111, the second receiving cavity can be a prism-shaped spatial structure, a cylindrical spatial structure, or a spatial structure of other shapes. The second receiving cavity is connected to the first receiving cavity 101, and at least a portion of the electrode terminal 23, the first connector 32, and the sampling structure 31 are accommodated in the second receiving cavity.

[0148] For example, the second receiving cavity is a rectangular groove-shaped space structure extending along the first direction to accommodate the sampling structure 31 extending along the first direction.

[0149] Because part of the electrode terminal 23 extends beyond the outer casing 21, and the first connector 32 and sampling structure 31 are also located outside the battery cell 20, that is, part of the electrode terminal 23 and sampling assembly 30 are structures that protrude from the battery cell 20; accordingly, a protrusion 1111 is provided on the second wall 111, so that the second receiving cavity formed by the protrusion 1111 can accommodate the electrode terminal 23, the first connector 32 and the sampling structure 31, and can make other positions of the second wall 111 close to or touch the first wall 211, thereby reducing the empty space between the second wall 111 and the first wall 211, improving the space utilization rate inside the battery device 100, improving the energy density of the battery device 100, and also reducing the volume of the housing 10 and the space occupied by the battery device 100.

[0150] Furthermore, because the distance between the sampling structure 31 and the electrode terminal 23 is relatively close, the space of the second receiving cavity is also reduced accordingly, thereby further improving the space utilization rate inside the battery device 100, increasing the energy density of the battery device 100, and reducing the space occupied by the battery device 100.

[0151] In this embodiment, a protrusion 1111 is provided on the second wall 111 of the housing 10, and the protrusion 1111 is opposite to the electrode terminal 23 and the sampling structure 31, so that the second wall 111 can better adapt to the shape of the battery cell 20 and match the shape of the battery cell 20, thereby reducing the empty space in the battery device 100, improving the space utilization rate inside the housing 10, and improving the energy density of the battery device 100.

[0152] refer to Figures 8 to 10 In some embodiments, the protrusion 1111 includes a first protrusion 1111a and a second protrusion 1111b connected to the first protrusion 1111a. The first protrusion 1111a corresponds to the electrode terminal 23, and the second protrusion 1111b corresponds to at least a portion of the first connector 32 and the sampling structure 31. The distance between the first protrusion 1111a and the first wall 211 is greater than the distance between the second protrusion 1111b and the first wall 211.

[0153] The first protrusion 1111a refers to the structure in the protrusion 1111 that corresponds to the electrode terminal 23, and the second protrusion 1111b refers to the structure in the protrusion 1111 that corresponds to the sampling structure 31. Since the electrode terminal 23 and the sampling structure 31 require different spaces, the shape of the first protrusion 1111a and the shape of the second protrusion 1111b can be different, and the shape of the first protrusion 1111a and the cavity formed by the second protrusion 1111b can also be different.

[0154] The distance between the first protrusion 1111a and the first wall 211 refers to the distance between the first protrusion 1111a and the first wall 211 in the direction of their arrangement. (Refer to...) Figure 9 The spacing is the size shown in H1 in the figure; the larger the spacing, the larger the space formed by the first protrusion 1111a to accommodate the extreme piece.

[0155] The distance between the second protrusion 1111b and the first wall 211 refers to the distance between the second protrusion 1111b and the first wall 211 in the arrangement direction of the first wall 211 and the second wall 111. (Refer to...) Figure 9 This spacing is the dimension shown in H2 in the figure.

[0156] Because the dimension of the electrode terminal 23 protruding above the first wall 211 is greater than the dimension of the sampling structure 31 protruding above the first wall 211, the distance between the first protrusion 1111a and the first wall 211 is made greater than the distance between the second protrusion 1111b and the first wall 211. This allows the first protrusion 1111a and the second protrusion 1111b to accommodate the space required by the corresponding electrode terminal 23 and the sampling structure 31, respectively. At the same time, it can also reduce the empty space between the electrode terminal 23, the sampling structure 31 and the second wall 111, improve the space utilization rate inside the battery device 100, and increase the energy density of the battery device 100.

[0157] In this embodiment, the protrusion 1111 includes a first protrusion 1111a and a second protrusion 1111b, so that the first protrusion 1111a and the second protrusion 1111b can be adapted to the electrode terminal 23 and the sampling component 30 respectively, thereby improving the space utilization of the battery device 100.

[0158] refer to Figures 8 to 10 In some embodiments, the protrusion 1111a is provided with an insulating layer 40 on the side facing the receiving cavity, and the insulating layer 40 at least covers the first protrusion 1111a.

[0159] The insulating layer 40 refers to a structure with insulating properties. The insulating layer 40 can be an independent film, sheet, or plate structure. The insulating layer 40 can also be a coating structure applied to the second wall 111. The insulating layer 40 is connected to the second wall 111. Depending on the structure of the insulating layer 40, the insulating layer 40 can be connected to the second wall 111 by bonding, welding, or other means, or it can be applied to the second wall 111 by coating or other means.

[0160] The insulating layer 40 is an insulating structure, and the material of the insulating layer 40 may include mica, ceramics, asbestos, resin, rubber, etc.

[0161] An insulating layer 40 is disposed on the side of the protrusion 1111 facing the receiving cavity, and at least covers the first protrusion 1111a. That is, the insulating layer 40 may only cover the first protrusion 1111a, or it may cover the first protrusion 1111a and the second protrusion 1111b. When the insulating layer 40 covers the first protrusion 1111a, the insulating layer 40 may completely cover the second protrusion 1111b, or it may only cover part of the second protrusion 1111b or not cover the second protrusion 1111b at all.

[0162] Since the battery cell 20 inputs or outputs electrical energy through the electrode terminal 23, the electrical energy flowing through the electrode terminal 23 is usually at a high voltage, and there is a risk of high voltage breakdown at the electrode terminal 23; and since the short circuit between the electrode terminal 23 and the first protrusion can easily lead to a short circuit in the battery cell 20, the safety risk is high; therefore, on the side of the first protrusion 1111a facing the receiving cavity, the electrode terminal 23 and the first protrusion 1111a are insulated and separated by the insulating layer 40, which reduces the risk of the electrode terminal 23 discharging to the first protrusion 1111a and reduces the risk of the electrode terminal 23 short-circuiting with the first protrusion 1111a.

[0163] Since the voltage on the sampling structure 31 is usually low, the risk of discharge breakdown of the sampling structure 31 is low, and the contact between the sampling structure 31 and the second protrusion 1111b is not easy to be directly short-circuited, an insulating layer 40 can be provided on the second protrusion 1111b, or an insulating layer 40 can be not provided.

[0164] In this embodiment, an insulating layer 40 is provided on the side of the protrusion 1111 facing the receiving cavity to reduce the risk of short circuit and outward discharge caused by the contact of the electrode terminal 23, sampling component 30 and other structures with the housing 10. The insulating layer 40 at least covers the first protrusion 1111a to reduce the risk of short circuit between the electrode terminal 23 and the housing 10.

[0165] refer to Figures 8 to 11 In some embodiments, the second wall 111 further includes a flat portion 112 connected to the protrusion 1111, and a connecting structure 60 is provided between the flat portion 112 and the first wall 211, and the flat portion 112 is connected to the first wall 211 through the connecting structure 60.

[0166] The flat portion 112 refers to the part of the second wall 111 that is different from the protrusion 1111 and is opposite to the first arm. Depending on the shape of the second wall 111, the shape of the flat portion 112 can be square, circular or other shapes. The flat portion 112 is connected to the protrusion 1111. The flat portion 112 can be connected to the protrusion 1111 by welding, bonding or other means. The flat portion 112 can also be integrally formed with the protrusion 1111. The material of the flat portion 112 can include metal, plastic or other materials.

[0167] The connecting structure 60 refers to the structure used to connect the flat portion 112 and the first wall 211. The connecting structure 60 can be an adhesive structure, a welded stamp, or other structure. The connecting structure 60 can also be a frame structure, a plate structure, or a structure of other shapes. Depending on the specific structure of the connecting structure 60, the connecting structure 60 can be connected to the flat portion 112 by welding, bonding, or other means, and the connecting structure 60 can be connected to the first wall 211 by welding, bonding, or other means. The connecting structure 60 is provided between the flat portion 112 and the first wall 211 so that the flat portion 112 can be connected to the first wall 211 through the connecting structure 60. At this time, the battery cell 20 can provide support for the flat portion 112 to improve the strength of the flat portion 112, thereby improving the strength of the entire second wall 111.

[0168] Understandably, the flat portion 112 can be a planar plate structure or a roughly flat plate structure, or a plate structure with a certain curvature. Due to the influence of the processing technology, the flat portion 112 can also be a plate structure with microscopic concavity and convexity or curvature.

[0169] When the length direction of the first connector 32 is parallel to the first direction or at an acute angle to the first direction, the distance between the sampling structure 31 and the electrode terminal 23 is smaller, and the space occupied by the sampling structure 31 and the electrode terminal 23 on the first wall 211 is smaller, so that the first wall 211 has a larger space to connect with the flat portion 112, and the connection area between the first wall 211 and the flat portion 112 is larger, thereby enabling the first wall 211 to better support the flat portion 112 and improve the strength of the second wall 111.

[0170] In this embodiment, the second wall 111 further includes a flat portion 112, and the flat portion 112 is connected to the first wall 211 to improve the strength of the second wall 111. Because the distance between the sampling structure 31 and the electrode terminal 23 is relatively close, the area on the first wall 211 that can be connected to the second wall 111 is increased, so that the flat portion 112 connected to the first wall 211 can better improve the strength of the second wall 111.

[0171] refer to Figures 8 to 11 In some embodiments, the sampling assembly 30 further includes a bracket 33, one side of which is connected to the first wall 211 and the other side of which is connected to the sampling structure 31, with a portion of the bracket 33 opposite to the protrusion 1111.

[0172] The support 33 refers to the structure in the sampling assembly 30 used to support the sampling structure 31. The support 33 can be a frame structure, a plate structure, or a structure of other shapes. One side of the support 33 is connected to the first wall 211 and the other side is connected to the sampling structure 31. That is, the support 33 is located between the sampling structure 31 and the first wall 211. The support 33 can be connected to the first wall 211 by welding, bonding, snapping, or other means. The sampling structure 31 can be connected to the support 33 by welding, bonding, snapping, or other means. The material of the support 33 can include metal, plastic, or other materials.

[0173] Since the bracket 33 is used to support the sampling structure 31, when the second wall 111 has a protrusion 1111, part of the bracket 33 can be opposite to the protrusion 1111, so that the sampling structure 31 can be opposite to the protrusion 1111.

[0174] In this embodiment, the sampling component 30 includes a bracket 33 to support the sampling structure 31.

[0175] refer to Figures 8 to 11 In some embodiments, the connecting structure 60 is an insulating structure and the bracket 33 is an insulating structural component; in the second direction, a portion of the bracket 33 extends between the flat portion 112 and the first wall 211, and the bracket 33 and the connecting structure 60 respectively cover different parts of the first wall 211.

[0176] The connection structure 60 is an insulating structure, meaning that the material of the connection structure 60 includes insulating materials. The material of the connection structure 60 may include mica, ceramics, asbestos, resin, rubber, or other insulating materials. Making the connection structure 60 an insulating material can prevent direct contact between the battery cell 20 and the second wall 111, thereby reducing the risk of short circuit between the battery cell 20 and the second wall 111 and improving the safety performance of the battery device 100.

[0177] The support 33 is an insulating structural component, meaning that the material of the support 33 includes insulating materials. The material of the support 33 may include mica, ceramic, asbestos, resin, rubber, or other insulating materials. Making the support 33 an insulating material can reduce the risk of short circuit between the sampling structure 31 and the support 33, and can also save the insulating layer 40 on the support 33, reducing space occupation. At the same time, the part of the support 33 extending beyond the sampling structure 31 can also be used to insulate and separate the first wall 211 and the second wall 111.

[0178] Part of the bracket 33 extends between the flat portion 112 and the first wall 211. Since the bracket 33 is an insulating structural component, the part of the bracket 33 extending between the flat portion 112 and the first wall 211 can also insulate and separate the corresponding part of the first wall 211 and the flat portion 112, thereby reducing the risk of short circuit between the battery cell 20 and the second wall 111.

[0179] Because the protrusion 1111 is a structure that protrudes away from the direction of the receiving cavity, that is, there is a height difference between the protrusion 1111 and the flat part 112, a right angle or rounded corner is usually formed at the connection between the flat part 112 and the protrusion 1111. At this part, the connection structure 60 is usually difficult to cover or is prone to separation, resulting in poor connection stability.

[0180] Accordingly, a portion of the bracket 33 extends between the flat portion 112 and the first wall 211. Since a portion of the bracket 33 corresponds to the protrusion 1111, this arrangement allows the bracket 33 to extend from the protrusion 1111 to the flat portion 112, so that the bracket 33 can separate the first wall 211 and the second wall 111 at the connection between the flat portion 112 and the protrusion 1111, thereby reducing the risk of short circuit between the battery cell 20 and the second wall 111.

[0181] The bracket 33 and the connecting structure 60 cover different parts of the first wall 211 respectively, so that the bracket 33 and the connecting structure 60 can not only insulate and separate the first wall 211 from the second wall 111, but also reduce the space waste caused by the overlap of the bracket 33 and the connecting structure 60.

[0182] In this embodiment, the connection structure 60 is made into an insulating structure to reduce the risk of short circuit between the battery cell 20 and the housing 10; at the same time, a portion of the bracket 33 extends between the second wall 111 and the first wall 211 to separate the corresponding first wall 211 and second wall 111 through the bracket 33, further reducing the risk of short circuit between the battery cell 20 and the housing 10.

[0183] refer to Figures 4 to 6 In some embodiments, the electrode terminal 23 has a first connection area 231 and a second connection area 232, the first connection area 231 and the second connection area 232 are arranged along a second direction, and the first connector 32 is connected to the sampling structure 31 at the first connection area 231; the battery device 100 also includes a second connector 50, the two ends of the second connector 50 are respectively connected to the adjacent electrode terminals 23 of two adjacent battery cells 20, and the second connector 50 is connected to the electrode terminal 23 at the second connection area 232.

[0184] The first connection area 231 and the second connection area 232 are both located on the electrode terminal 23. The first connection area 231 and the second connection area 232 can be areas set on the electrode terminal 23, or areas enclosed on the electrode terminal 23 by structural members.

[0185] The second connector 50 refers to the structure used to connect the electrode terminals 23 of different battery cells 20. The second connector 50 can be a thin plate structure, a strip structure, or other shapes. The second connector 50 can be square, trapezoidal, or other shapes. The second connector 50 is used to transmit electrical energy, so the material of the second connector 50 should be a conductive material. The material of the second connector 50 can include copper, aluminum, or other conductive materials.

[0186] The first connector 32 is connected to the electrode terminal 23 in the first connection area 231, that is, the connection part of the first connector 32 and the electrode terminal 23 is located in the first connection area 231; the second connector 50 is connected to the electrode terminal 23 in the second connection area 232, that is, the connection part of the second connector 50 and the electrode terminal 23 is located in the second connection area 232.

[0187] By providing a first connection area 231 and a second connection area 232 on the electrode terminal 23, different connection positions can be defined for the first connector 32 and the second connector 50, so as to reduce mutual interference between the first connector 32 and the second connector 50.

[0188] The first connection area 231 and the second connection area 232 are arranged along the second direction so that the connection parts of the first connector 32 and the electrode terminal 23, and the connection parts of the second connector 50 and the electrode terminal 23 can also be arranged along the second direction so that the first connector 32 can be better connected to the sampling structure 31.

[0189] This embodiment provides a structure for some electrode terminals 23, such that the electrode terminals 23 include a first connection area 231 and a second connection area 232 arranged along a second direction, so that the first connector 32 and the second connector 50 are connected to the electrode terminals 23 at different positions respectively.

[0190] In some embodiments, the battery device 100 includes a housing 10, a battery cell 20, and a sampling assembly 30.

[0191] The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are interlocked to form a receiving cavity, in which the battery cell 20 is received.

[0192] The battery cell 20 includes a housing 21, which includes a first wall 211. The first wall 211 is located on the side of the housing 21 facing upward along the height direction Z of the battery device 100, and electrode terminals 23 are provided on the first wall 211.

[0193] The sampling assembly 30 includes a first connector 32 and a sampling structure 31. One side of the first connector 32 is connected to the electrode terminal 23, and the other side of the first connector 32 is connected to the sampling structure 31. The length direction of the first connector 32 is parallel to the thickness direction X of the battery cell 20. The sampling structure 31 includes a main body 311 and a connecting part 312 connected to the main body 311. The connecting part 312 is located on one side of the electrode terminal 23 along the thickness direction X of the battery cell 20, and one side of the first connector 32 is connected to the connecting part 312.

[0194] The main body 311 is located on one side of the electrode terminal 23 along the width direction Y of the battery cell 20, and the main body 311 is adjacent to the electrode terminal 23; the main body 311 is provided with a through groove 3111, which is located at the connection between the main body 311 and the connecting part 312.

[0195] The first housing 11 has a second wall 111, which is the top cover of the first housing 11. The second wall 111 has a first protrusion 1111a and a second protrusion 1111b protruding in the direction away from the receiving cavity. The first protrusion 1111a corresponds to the electrode terminal 23, and the second protrusion 1111b corresponds to the sampling structure 31. The second wall 111 also includes a flat portion 112, which is connected to the side of the second protrusion 1111b away from the first protrusion 1111a. The flat portion 112 corresponds to and is connected to the first wall 211.

[0196] The sampling assembly 30 also includes a bracket 33, one side of which is connected to the first wall 211 and the other side of which is connected to the sampling structure 31; a portion of the bracket 33 extends from below the second protrusion 1111b to below the flat portion 112.

[0197] Secondly, embodiments of this application also provide an electrical device, including the battery device 100 provided in some embodiments of the first aspect.

[0198] In this electrical device, the battery device 100 has a large energy density, occupies a small space, and has a large connection area between the top cover of the first housing 11 and the first wall 211 of the battery cell 20, and the first housing 11 has high strength.

[0199] The electrical device provided in this application embodiment can be applied to various electrical devices that use battery device 100, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles 1000, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0200] 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: Box; A battery cell assembly includes at least two battery cells, the at least two battery cells being arranged along a first direction, each battery cell including a housing having a first wall, the first wall having electrode terminals; A sampling component is disposed on one side of the first wall. The sampling component includes a sampling structure and a first connector. At least a portion of the sampling structure is located on one side of the electrode terminal along a second direction. The second direction is set at an angle to the first direction. One side of the first connector is connected to the sampling structure, and the other side of the first connector is connected to the electrode terminal. The length direction of the first connector is parallel to the first direction, or the length direction of the first connector is set at an acute angle to the first direction, so that the sampling structure is located adjacent to the electrode terminal.

2. The battery device according to claim 1, characterized by The first connector includes two first sides and two second sides. The two first sides are arranged opposite to each other, and the two second sides are arranged opposite to each other and connected to the two first sides respectively. The length of the first side is greater than the length of the second side. The first side is parallel to the first direction or is arranged at an acute angle to the first direction.

3. The battery device of claim 2, wherein, The sampling structure includes a main body and a connecting part connected to the main body, and the connecting part is also connected to the first connecting member; At least a portion of the main body is located on one side of the electrode terminal along the second direction, at least a portion of the connecting portion is located on one side of the electrode terminal along the first direction, and the first connector is connected to the connecting portion at the second side.

4. The battery device of claim 2, wherein The sampling structure includes a main body and a connecting part connected to the main body, and the connecting part is also connected to the first connecting member; At least a portion of the main body is located on one side of the electrode terminal along the second direction, at least a portion of the connecting portion is located on one side of the electrode terminal along the second direction, and the first connector is connected to the connecting portion at the first side.

5. The battery device according to any one of claims 3 or 4, characterized in that, A through groove is provided on the main body, and the through groove is located at the connection between the main body and the connecting part.

6. The battery device of claim 5, wherein The length direction of the through groove is parallel to the first direction, or the length direction of the through groove is set at an acute angle to the first direction.

7. The battery device of claim 5, wherein The number of the through slots is at least two, and each through slot separates a deformable portion on the main body; The deformable portion includes a straight portion and an arc-shaped portion connected to the straight portion, wherein the extension direction of the straight portion is parallel to the first direction.

8. The battery device according to any one of claims 1 to 4, wherein The housing includes a first housing and a second housing, the second housing being fastened to the first housing to form a first receiving cavity, and the battery cell being received in the first receiving cavity; The first housing has a second wall facing the first wall, and the second wall has a protrusion protruding in a direction away from the first receiving cavity. The length direction of the protrusion is parallel to the first direction. The protrusion forms a second receiving cavity on the side facing the first receiving cavity. The second receiving cavity is used to accommodate at least a portion of the electrode terminal, the first connector, and the sampling structure.

9. The battery device according to claim 8, characterized in that, The protrusion includes a first protrusion and a second protrusion connected to the first protrusion. The first protrusion corresponds to the electrode terminal, and the second protrusion corresponds to at least a portion of the first connector and the sampling structure. The distance between the first protrusion and the first wall is greater than the distance between the second protrusion and the first wall.

10. The battery device of claim 9, wherein, An insulating layer is provided on the side of the protrusion facing the receiving cavity, and the insulating layer at least covers the first protrusion.

11. The battery device of claim 8, wherein, The second wall also includes a flat portion connected to the protrusion, and a connecting structure is provided between the flat portion and the first wall, and the flat portion is connected to the first wall through the connecting structure.

12. The battery device of claim 11, wherein, The sampling assembly also includes a bracket, one side of which is connected to the first wall and the other side of which is connected to the sampling structure, with a portion of the bracket opposite to the protrusion.

13. The battery device of claim 12, wherein, The connection structure is an insulating structure, and the bracket is an insulating structural component; In the second direction, a portion of the bracket extends between the flat portion and the first wall, and the bracket and the connecting structure respectively cover different parts of the first wall.

14. The battery device of any one of claims 1-4, wherein, The electrode terminal has a first connection area and a second connection area, the first connection area and the second connection area are arranged along the second direction, and the first connector is connected to the sampling structure at the first connection area; The battery device further includes a second connector, the two ends of which are respectively connected to adjacent electrode terminals of two adjacent battery cells, and the second connector is connected to the electrode terminals in the second connection area.

15. An electrical device, comprising: Includes the battery device as described in any one of claims 1-14.

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