Battery apparatus, sampling assembly, energy storage apparatus, and electric apparatus

Abstract

The present application is suitable for the technical field of batteries, and provides a battery apparatus, a sampling assembly, an energy storage apparatus, and an electric apparatus. A battery apparatus (100) comprises: a battery cell assembly (20), comprising a plurality of battery cells (21); and a sampling assembly (30), comprising a sampling main body (31) and an adapter (32), wherein the sampling main body (31) comprises two insulating films (311) and a plurality of sampling wire cores (312) arranged between the two insulating films (311), the plurality of sampling wire cores (312) are arranged at intervals, the sampling wire cores (312) each comprise a sampling portion (3121), openings (3111) are formed on at least one insulating film (311), each sampling portion (3121) is exposed out of the surface of the insulating film (311) through the corresponding opening (3111), and the adapter (32) has one end fixedly connected to the sampling portions (3121) and electrically connected to the sampling portions (3121), and the other end configured to collect sampling signals of the battery cells (21). The battery apparatus provided in embodiments of the present application can reduce costs of the sampling assembly.

Description

Battery devices, sampling components, energy storage devices, and power consumption devices Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery device, a sampling component, an energy storage device, and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] During battery use, sampling components are typically used to collect battery information to monitor its operational status. However, some sampling components in related technologies suffer from high costs. Summary of the Invention

[0004] In view of this, embodiments of this application provide a battery device, a sampling component, an energy storage device, and an electrical device, which can reduce the cost of the sampling component and the battery device.

[0005] An embodiment of the first aspect of this application provides a battery device, including a battery cell assembly comprising multiple battery cells; a sampling assembly comprising a sampling body and an adapter, the sampling body comprising two opposing insulating films and multiple sampling wires disposed between the two insulating films, the multiple sampling wires being arranged at intervals, each sampling wire including a sampling portion, at least one insulating film having an opening, the sampling portion being exposed on the surface of the insulating film through the opening; one end of the adapter is fixedly connected to and electrically connected to the sampling portion, and the other end is used to collect sampling signals from the battery cells.

[0006] In the battery device provided in this application embodiment, the sampling body includes two opposing insulating films and multiple sampling wires disposed between the two insulating films. The sampling portion of the sampling wires can be exposed on the surface of the insulating films, so that the sampling portion can be fixed and electrically connected to the adapter. At the same time, the other end of the adapter can collect the sampling signal of the battery cell. In this way, the sampling wires can collect the sampling signal of the battery cell through the adapter. The above-mentioned battery device does not require bending the wires to achieve the connection between the wires and the battery cells, solving the problems of high bending process difficulty and low manufacturing efficiency of flexible flat wires, and reducing the manufacturing cost of the sampling component and the battery device.

[0007] In some embodiments, the sampling core extends along a first direction, and multiple sampling cores are arranged at intervals along a second direction, the second direction intersecting the first direction.

[0008] By adopting the above technical solution, the sampling body includes multiple parallel and spaced sampling cores, and the sampling body can collect sampling signals from multiple battery cells through the multiple sampling cores respectively.

[0009] In some embodiments, an insulating adhesive is provided between the two insulating films, and the insulating adhesive at least partially fills the space between any two adjacent sampling cores.

[0010] By adopting the above technical solution, multiple sampling cores can be isolated and insulated with insulating glue, making it less likely for adjacent sampling cores to short-circuit, thus improving the stability of the sampling assembly.

[0011] In some embodiments, at least one insulating film is a thin film with insulating adhesive.

[0012] By adopting the above technical solution, the two insulating films and the sampling core layer containing the sampling core can be directly composited and connected during manufacturing. The sampling body has a simple structure, is easy to manufacture, and has a low cost.

[0013] In some embodiments, the adapter spans multiple sampling cores; the adapter includes a conductive element and the conductive element is provided with multiple sampling connection portions, the multiple sampling connection portions are spaced apart along the arrangement direction of the sampling cores, and the adapter is connected to the sampling cores through at least one sampling connection portion.

[0014] By adopting the above technical solution, the adapter can be connected to a sampling core through at least one sampling connection part, which improves the versatility of the adapter, reduces the types of adapters, and saves on the design and material costs of the adapter.

[0015] In some embodiments, the adapter further includes two insulating cover films disposed on both sides of the conductive element, the cover films having a plurality of spaced through holes, each through hole exposing a corresponding sampling connection portion.

[0016] By adopting the above technical solution, the adapter includes a conductive component and two covering films. The covering films can protect and insulate the conductive component, and the through holes on the covering films can expose the sampling connection part.

[0017] In some embodiments, there are multiple adapters, and the sampling body is provided with a row of adapters on both sides along its width direction, with multiple adapters in each row spaced apart along a first direction.

[0018] By adopting the above technical solution, the sampling component can sample at least two rows of battery cells using two rows of adapters. The sampling component has a compact structure and occupies less space.

[0019] In some embodiments, the adapter has a first portion covering the sampling body; along the width direction of the sampling body, the size of at least one of the first portions of the adapter is greater than or equal to half the size of the sampling body.

[0020] By adopting the above technical solution, the adapter can extend from the edge of the sampling body to at least the middle of the sampling body, so that the adapter can be connected to a sampling core, which further improves the design versatility of the adapter and reduces the material cost of the adapter.

[0021] In some embodiments, the adapter and the sampling unit are fixedly connected by at least one of welding and mechanical connection.

[0022] By adopting the above technical solution, since the sampling part is exposed on the surface of the sampling body, the sampling part can be fixedly connected and electrically connected to the adapter in a variety of ways. The manufacturing method of the sampling component is flexible and the industrialization difficulty is low, thereby reducing the overall manufacturing cost of the sampling component.

[0023] In some embodiments, the adapter is welded to the sampling unit, and the adapter is provided with one or more solder receiving holes.

[0024] By adopting the above technical solution, during the process of welding the adapter to the sampling part, the solder can be contained in the solder receiving hole, which improves the stability of the welding connection.

[0025] In some embodiments, the sampling assembly further includes a piercing terminal that passes through the adapter and the sampling body, and the piercing terminal abuts against and electrically connects the adapter and the sampling part.

[0026] By adopting the above technical solution, the adapter can be fixed and electrically connected to the sampling wire core by piercing the terminal. The connection method between the adapter and the sampling body is relatively simple, easy to manufacture, and has a low production cost.

[0027] In some embodiments, the sampling assembly further includes a protective film that covers the connection between the adapter and the sampling body.

[0028] By setting a protective film, the sampling component can protect the connection between the adapter and the sampling body, which can reduce the risk of deformation at the connection and protect the connection from being punctured by humans.

[0029] In some embodiments, the sampling assembly further includes a busbar electrically connected to the electrode terminals of the battery cell, and the end of the adapter away from the sampling body is fixedly connected to the busbar.

[0030] By adopting the above technical solution, the two ends of the adapter are fixed to the sampling body and the busbar respectively, so that the sampling body can collect the sampling signal of the battery cell through the adapter and the busbar.

[0031] In some embodiments, the adapter is fixedly connected to the busbar by at least one of the following connection methods: welding, bonding, snap-fitting, and hot riveting.

[0032] By adopting the above technical solutions, the adapter can be fixedly connected to the busbar in a variety of ways, and the sampling component can be flexibly and easily manufactured.

[0033] In some embodiments, the adapter has a weak portion configured to deform as the battery cell expands and deforms.

[0034] By adopting the above technical solution, the weak part can deform to adapt to the expansion of the battery cell, reducing the risk of the adapter tearing and the risk of connection failure between the adapter and the battery cell or busbar.

[0035] In some embodiments, the weak point is a curved perforated hole.

[0036] By adopting the above technical solution, it is convenient to make weak parts on the adapter, and the weak parts have good deformation ability, which can better adapt to the deformation of the battery cells.

[0037] In some embodiments, the sampling assembly further includes a carrier, on which both the sampling body and the adapter are disposed.

[0038] By adopting the above technical solution, the sampling component can be easily connected to the battery cell assembly, and the carrier can reduce the risk of oxidation and corrosion of the sampling component.

[0039] In some embodiments, the carrier is an insulating film layer or a thermoformed board, which is easy to assemble.

[0040] In some embodiments, the adapter includes a conductive element; the number of adapters is plurality of, and the plurality of adapters includes a voltage sampling adapter, wherein the conductive element of the voltage sampling adapter is electrically connected to at least one sampling wire core. The adapter provided in this application embodiment includes a voltage sampling adapter, thereby enabling the sampling assembly to acquire voltage sampling signals from individual battery cells, facilitating the monitoring of the status of individual battery cells.

[0041] In some embodiments, the voltage sampling adapter includes a fuse for disconnecting when the current flowing through the conductive element exceeds a threshold.

[0042] By incorporating a fuse in the voltage sampling adapter, overcurrent protection can be achieved, improving safety and reliability.

[0043] In some embodiments, the fuse portion is a bent structure, and the voltage sampling adapter further includes two weak portions located on both sides of the fuse portion along the extension direction of the sampling core.

[0044] By adopting the above technical solution, overcurrent protection and tear resistance can be achieved, and the layout space on the voltage sampling adapter can be effectively utilized, which helps to reduce the size of the voltage sampling adapter.

[0045] In some embodiments, the plurality of adapters include a temperature sampling adapter, the temperature sampling adapter including a temperature detection element and at least two conductive elements electrically connected to the temperature detection element, each of the conductive elements having a sampling connection portion, and the temperature sampling adapter being electrically connected to two of the sampling elements through the two sampling connection portions.

[0046] By adopting the above technical solution, the acquisition component can acquire temperature sampling signals of individual battery cells.

[0047] In some embodiments, at least two of the sampling connection portions are staggered along the extension direction of the sampling core, and / or at least two of the sampling connection portions are spaced apart along a direction perpendicular to the sampling core.

[0048] By adopting the above technical solution, at least two of the conductive elements are spaced apart along the extension direction of the sampling wire core, and / or, at least one of the conductive elements is provided with a plurality of sampling connection portions, and the sampling connection portions on two of the conductive elements are staggered in a direction perpendicular to the conductive wire.

[0049] By adopting the above technical solutions, the design versatility of temperature sampling adapters can be improved.

[0050] In some embodiments, the temperature sampling adapter has adhesive at the connection between the sampling connection part and the sampling part.

[0051] By adopting the above technical solution, short circuits are less likely to occur between the two sampling connection parts of the temperature sampling adapter, which improves the reliability of the temperature sampling adapter and enhances the pull-out force of the solder joint.

[0052] In some embodiments, one end of each of the multiple sampling cores extends to the same side of the sampling body to form an output port on one side of the sampling body, and at least one insulating film has an opening that exposes the output port; the sampling assembly also includes a connector plug that is connected to the output port through the opening.

[0053] By adopting the above technical solution, an output port is formed on one side of the sampling body, and the signal collected by the sampling core can be output to the outside through the connector. The sampling component has a simple structure and is easy to assemble.

[0054] In some embodiments, the connector plug is crimped, plugged in, or soldered to the output port.

[0055] By adopting the above technical solution, the connector plug and the output port can be connected in a variety of ways, which is easy to implement.

[0056] An embodiment of the second aspect of this application provides a sampling assembly, which includes a sampling body and an adapter. The sampling body includes two opposing insulating films and multiple sampling wires disposed between the two insulating films. The multiple sampling wires are arranged at intervals. Each sampling wire includes a sampling part. At least one insulating film has an opening, through which the sampling part is exposed on the surface of the insulating film. One end of the adapter is fixedly connected to the sampling part and electrically connected to the sampling part, and the other end is used to collect the sampling signal of a battery cell.

[0057] In some embodiments, the sampling body includes multiple sampling cores extending along a first direction and the multiple sampling cores being arranged at intervals along a second direction, the second direction intersecting the first direction; an insulating adhesive is provided between two insulating films, the insulating adhesive at least partially filling the space between any two adjacent sampling cores.

[0058] An embodiment of the third aspect of this application provides an energy storage device, including a battery device as in the first aspect or a sampling component as in the second aspect, wherein the battery cell or battery device is used to store or provide electrical energy.

[0059] An embodiment of the fourth aspect of this application provides an electrical device, such as a battery device of the first aspect, a sampling component of the second aspect, or an energy storage device of the third aspect, wherein the battery device is used to store or provide electrical energy.

[0060] 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

[0061] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0062] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0063] Figure 2 is an exploded view of a battery device provided in an embodiment of this application;

[0064] Figure 3 is an exploded view of a single battery cell provided in an embodiment of this application;

[0065] Figure 4 is a schematic diagram of the structure of a sampling component provided in an embodiment of this application;

[0066] Figure 5 is a partial enlarged view of part A in the sampling component shown in Figure 4;

[0067] Figure 6 is a partial enlarged view of one end of the sampling component described in Figure 4;

[0068] Figure 7 is a structural schematic diagram of the sampling body and adapter in the sampling assembly shown in Figure 4;

[0069] Figure 8 is a partial enlarged view of part B in the sampling component shown in Figure 7;

[0070] Figure 9 is an exploded perspective view of a sampling subject provided in an embodiment of this application;

[0071] Figure 10 is a partial enlarged view of part C in the sampling body shown in Figure 9;

[0072] Figure 11 is a cross-sectional view of the sampling body along its thickness direction according to an embodiment of this application;

[0073] Figure 12 is a schematic diagram of the sampling body, adapter and protective film provided in an embodiment of this application;

[0074] Figure 13 is a partial schematic diagram of the sampling body and adapter provided in an embodiment of this application;

[0075] Figure 14 is a partial enlarged view of part D in Figure 13;

[0076] Figure 15 is a schematic diagram of the voltage sampling adapter shown in Figure 14;

[0077] Figure 16 is a three-dimensional exploded view of the voltage sampling adapter shown in Figure 15;

[0078] Figure 17 is a three-dimensional exploded view of the temperature sampling adapter shown in Figure 14;

[0079] Figure 18 is a structural schematic diagram of the sampling body and adapter provided in another embodiment of this application;

[0080] Figure 19 is a partial enlarged view of part E in Figure 18;

[0081] Figure 20 is an exploded perspective view of the sampling body and voltage sampling adapter provided in an embodiment of this application;

[0082] Figure 21 is a partial enlarged view of part F in Figure 20;

[0083] Figure 22 is an exploded perspective view of the sampling body and temperature sampling adapter provided in an embodiment of this application;

[0084] Figure 23 is a schematic diagram of the sampling component provided in another embodiment of this application;

[0085] Figure 24 is a partial enlarged view of part G in Figure 23;

[0086] Figure 25 is a schematic diagram of the structure of a sampling body provided in an embodiment of this application;

[0087] Figure 26 is a partial enlarged view of part H in Figure 25;

[0088] Figure 27 is a schematic diagram of the sampling body and connector provided in an embodiment of this application;

[0089] Figure 28 is a structural schematic diagram of the sampling body and connector provided in another embodiment of this application;

[0090] Figure 29 is a structural schematic diagram of the sampling body and connector provided in another embodiment of this application;

[0091] The markings in the diagram represent the following: 1000, Vehicle; 100, Battery Unit; 10, Housing; 11, Upper Housing; 12, Lower Housing; 20, Battery Cell Assembly; 21, Battery Cell; 211, Housing; 212, End Cap; 213, Electrode Assembly; 214, Electrode Terminal; 215, Pressure Relief Mechanism; 30, Sampling Assembly; 301, Output Port; 31, Sampling Body; 311, Insulating Film; 3111, Opening; 3113, Window; 312, Sampling Wire Core; 3121, Sampling Section; 32, Adapter; 321, Conductive Component; 3211, Sampling 3212. Connecting part; 322. Solder receiving hole; 322. Covering film; 3221. Through hole; 323. Weak part; 324. Fusible part; 325. Temperature detection component; 326. Reinforcing component; 3201. First part; 3202. Second part; 3203. Intermediate part; 32a. Voltage sampling adapter; 32b. Temperature sampling adapter; 33. Busbar; 34. Piercing terminal; 35. Protective film; 36. Carrier; 37. Connector plug; 41. Horizontal board-end connector; 42. Board-end connector; 43. Vertical board-end connector. Embodiments of the present invention

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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).

[0098] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not 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.

[0099] 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.

[0100] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0101] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0102] During battery use, sampling components are typically used to collect battery information to monitor its operating status. This information includes parameters such as current, voltage, and temperature, which reflect the battery's operating condition. The sampling components send this information to the battery management system (BMS), which can then determine the battery's operating status based on these parameters, allowing the BMS to take timely measures such as power cut-off or pressure relief.

[0103] Some data acquisition components in related technologies include flexible flat cables (FFCs) for data acquisition. The flexible flat cable includes an insulating plate and multiple wire cores disposed within the insulating plate. The ends of the wire cores need to be bent to form bends, which extend to the corresponding busbars and are welded to the busbars. However, the wire core bending process of the flexible flat cable is cumbersome and difficult, which reduces manufacturing efficiency and increases manufacturing costs.

[0104] In view of this, embodiments of this application provide a battery device that can reduce the cost of the sampling component and the battery device. The battery device includes a battery cell assembly and a sampling component. The battery cell assembly includes multiple battery cells. The sampling component includes a sampling body and an adapter. The sampling body includes two opposing insulating films and multiple sampling wires disposed between the two insulating films. At least one insulating film has an opening. The sampling wires include sampling portions that are exposed on the surface of the insulating film through the openings. One end of the adapter is fixedly connected to at least one sampling portion and electrically connected to the sampling portion, and the other end is used to collect the sampling signal of the battery cell.

[0105] In the battery device provided in this application embodiment, the sampling body includes two layers of insulating film and a sampling wire core. The sampling portion of the sampling wire core can be exposed on the surface of the insulating film, so that the sampling portion can be fixed and electrically connected to the adapter. At the same time, the other end of the adapter can collect the sampling signal of the battery cell. In this way, the sampling wire core can collect the sampling signal of the battery cell through the adapter. The above-mentioned battery device does not require bending the wire core to achieve the connection between the wire core and the battery cell or busbar, which solves the problems of high bending process difficulty and low manufacturing efficiency of flexible flat wires, and reduces the manufacturing cost of sampling components and battery devices.

[0106] The technical solutions described in the embodiments of this application are applicable to sampling components, battery devices including sampling components, and energy storage devices and power consumption devices using battery devices.

[0107] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0108] The battery cell 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.

[0109] 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 device as an energy storage element. Electrical devices include, for example, mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft.

[0110] The energy storage device provided in this application includes one or more battery clusters to improve the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0111] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0112] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0113] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0114] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0115] Please refer to Figure 1, which is a structural schematic diagram 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 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0116] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0117] Referring to Figure 2, which is an exploded structural diagram of a battery device 100 provided in some embodiments of this application, the battery device mentioned in the embodiments of this application may include one or more battery cell assemblies 20 for providing voltage and capacity. A battery cell assembly 20 may include multiple battery cells 21, which are connected in series, parallel, or mixed connections via busbars.

[0118] In some embodiments, the multiple battery cells 21 in the battery device 100 can be electrically connected through a busbar to achieve parallel, series, or mixed connection of the multiple battery cells 21 in the battery 100.

[0119] In some embodiments, the battery cell assembly 20 is typically formed by arranging multiple battery cells 21; as an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing multiple battery cells 21 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 21 together with cable ties.

[0120] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed within the housing 10.

[0121] As an example, the battery cell assembly 20 can be a battery module, and the battery cell assembly 21 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0122] As an example, the battery cell assembly 20 can also be housed in the housing 10 by directly fixing multiple battery cells 21 to the housing 10.

[0123] As an example, the housing 10 may include an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 are fastened together to form a closed receiving cavity inside the housing 10 to house the battery cell assembly 20. Here, "closed" means covered or closed, and can be either sealed or unsealed.

[0124] 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 a closed receiving cavity to house the battery cell assembly 20.

[0125] As an example, the housing 10 can be part of the chassis structure of the vehicle 1000. For example, the top cover of the housing 10 can be at least part of the floor of the vehicle 1000, or the frame of the housing 10 can be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0126] In some embodiments, battery device 100 refers to an energy storage device, which includes a housing 10, and at least one side of the housing 10 has a door. The energy storage device includes energy storage containers, energy storage cabinets, etc.

[0127] Please refer to Figure 3. The battery cell 21 is the smallest unit that makes up the battery device. The battery cell 21 includes a housing 211, an end cap 212, an electrode assembly 213, and other functional components.

[0128] End cap 212 refers to a component that covers the opening of housing 211 to isolate the internal environment of battery cell 21 from the external environment. The shape of end cap 212 can be adapted to the shape of housing 211 to fit it. Optionally, end cap 212 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 212 is not easily deformed under pressure and impact, giving battery cell 21 higher structural strength and improved reliability. Functional components such as electrode terminals 214 and pressure relief mechanism 215 can be provided on end cap 212. Electrode terminals 214 can be used for electrical connection with electrode assembly 213 for outputting or inputting electrical energy to battery cell 21. In some embodiments, pressure relief mechanism 215 is used to release internal pressure when the internal pressure or temperature of battery cell 21 reaches a threshold. The material of end cap 212 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 also be provided on the inner side of the end cap 212 to reduce the risk of short circuit. For example, the insulating element may be made of plastic, rubber, etc.

[0129] The housing 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 21. This internal environment can accommodate the electrode assembly 213, electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. An opening can be provided on the housing 211, and the end cap 212 can be used to close the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 212 and the housing 211 can be integrated. Specifically, the end cap 212 and the housing 211 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 211, the end cap 212 closes the housing 211. The housing 211 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 213. The shell 211 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0130] Electrode assembly 213 is the component in the battery cell 21 where the electrochemical reaction occurs. The casing 211 may contain one or more electrode assemblies 213. The electrode assembly 213 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 213, 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 device 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 214 to form a current loop.

[0131] In some embodiments, a pressure relief mechanism 215 is provided on one side of the battery cell 21. The pressure relief mechanism 215 is an element or component that is actuated to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold. The threshold design varies depending on design requirements. The threshold may depend on one or more materials of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 21. The internal pressure of the battery cell 21 is the pressure inside the casing 211. The pressure relief mechanism 215 may take the form of an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and may specifically adopt a pressure-sensitive element or structure. That is, when the internal pressure of the battery cell 21 reaches the predetermined threshold, the pressure relief mechanism 215 performs an action or a weak part provided in the pressure relief mechanism 215 ruptures, thereby forming an opening or channel for releasing internal pressure.

[0132] The term "actuation" as used in this application refers to the pressure relief mechanism 215 being activated or undergoing a certain state, thereby releasing the internal pressure of the battery cell 21. The action of the pressure relief mechanism 215 may include, but is not limited to, at least a portion of the pressure relief mechanism 215 rupturing, breaking, tearing, or opening, etc. When the pressure relief mechanism 215 is actuated, the high-temperature, high-pressure substances inside the battery cell 21 are discharged outwards from the actuated portion as waste. This method allows for pressure relief of the battery cell 21 under controllable pressure, thereby preventing potentially more serious accidents. The waste from the battery cell 21 mentioned in this application includes, but is not limited to, electrolyte, dissolved or broken positive and negative electrode plates, fragments of the separator, high-temperature, high-pressure gases generated during the reaction, flames, etc.

[0133] Referring to Figures 2 to 8, an embodiment of the first aspect of this application proposes a battery device 100. The battery device 100 includes a battery cell assembly 20 and a sampling assembly 30. The battery cell assembly 20 includes a plurality of battery cells 21. The sampling assembly 30 includes a sampling body 31 and an adapter 32. The sampling body 31 includes two opposing insulating films 311 and a plurality of sampling wires 312 disposed between the two insulating films 311. The plurality of sampling wires 312 are arranged at intervals. Each sampling wire 312 includes a sampling portion 3121. At least one insulating film 311 has an opening 3111, through which the sampling portion 3121 is exposed on the surface of the insulating film 311. One end of the adapter 32 is fixedly connected to and electrically connected to the sampling portion 3121, and the other end is used to collect the sampling signal of the battery cell 21.

[0134] In some embodiments, the battery cell assembly 20 includes a plurality of battery cells 21 arranged sequentially along a first direction X, which may be the length direction of the housing 10. In other embodiments, the first direction X may also be the width direction of the housing 10, or the first direction X may be a direction that intersects both the length direction and the width direction of the housing 10.

[0135] The number of battery cell components 20 can be one or more. When the number of battery cell components 20 is multiple, the multiple battery cell components 20 can be arranged in a row along the first direction X, and the multiple battery cell components 20 can also be arranged in multiple columns along the second direction Y intersecting the first direction X, so that the battery cells 21 are arranged in an array.

[0136] The sampling assembly 30 includes a sampling body 31 and an adapter 32. The sampling body 31 can be flat, sheet-like, or other shapes. The sampling body 31 includes two insulating films 311 and a sampling wire core 312. The two insulating films 311 can support and protect the sampling wire core 312.

[0137] The insulating film 311 is used to provide insulation and protection for the sampling core 312. The insulating film 311 is an insulating film. In some embodiments, the insulating film 311 is a polyimide (PI) film, which has excellent heat resistance. The insulating film 311 may also be a polyethylene terephthalate film (PET film), a polystyrene insulating film (PS insulating film), or other insulating films.

[0138] The sampling core 312 can be a metal core, for example, a copper wire. The sampling body 31 has a simple structure. Compared with the sampling body using an FPC, the sampling body 31 provided in this application embodiment has a lower manufacturing cost. The number of sampling cores 312 is multiple, and the multiple sampling cores 312 are spaced apart and insulated, so that each sampling core 312 can independently collect signals.

[0139] Two insulating films 311 can cover multiple sampling cores 312, and at least one insulating film 311 has an opening 3111; the opening 3111 is disposed opposite to the sampling part 3121 to expose the sampling part 3121. In some embodiments, at least one insulating film 311 on the side of the sampling body 31 near the adapter 32 has an opening 3111, so that the adapter 32 can be electrically connected to the sampling part 3121 through the opening 3111; in other embodiments, openings 3111 exposing the sampling part 3121 may also be provided on both insulating films 311.

[0140] As shown in Figures 6 to 10, the sampling core 312 includes a sampling portion 3121, which is exposed on the surface of the sampling body 31 through an opening 3111. The sampling portion 3121 is the part of the sampling core 312 used to connect to the adapter 32. By providing the opening 3111, the contact area between the sampling core 312 and the adapter 32 is larger, resulting in better connection stability.

[0141] The number of adapters 32 can be one or more. When there are multiple adapters 32, different adapters 32 can be connected to different sampling cores 312.

[0142] One end of the adapter 32 is fixedly connected to the sampling unit 3121 and electrically connected to the sampling unit 3121. The other end of the adapter 32 is used to collect the sampling signal of the battery cell 21. The sampling signal includes the current, voltage, temperature, air pressure and other signals of the battery cell 21. Thus, the sampling core 312 can collect the sampling signal of the battery cell 21 through the adapter 32.

[0143] For example, the adapter 32 is connected to the busbar 33 and then to the battery cell 21 via the busbar 33. It can be understood that the other end of the adapter 32 can also be directly connected to the battery cell 21 or connected to the battery cell 21 via other components.

[0144] In the battery device 100 provided in this application embodiment, the sampling body 31 includes two insulating films 311 and multiple sampling wires 312 disposed between the two insulating films 311. The sampling portion 3121 of the sampling wire 312 can be exposed on the surface of the insulating film 311 through an opening in the insulating film 311, so that the sampling portion 3121 can be fixed and electrically connected to the adapter 32. At the same time, the other end of the adapter 32 is used to collect the sampling signal of the battery cell 21. Thus, the sampling wire 312 can collect the sampling signal of the battery cell 21 through the adapter 32. In the above-mentioned battery device 100, the sampling wire 312 does not need to be broken and folded to connect to the target sampling point, that is, it is not necessary to bend the wire to achieve the connection between the wire and the battery cell 21 or the busbar 33. This solves the problems of high bending process difficulty and low manufacturing efficiency of flexible flat wires, and reduces the manufacturing cost of the sampling component 30 and the battery device 100.

[0145] Referring to Figures 4, 9, and 10, in some embodiments, the sampling body 31 includes multiple sampling cores 312, which extend along a first direction X, and the multiple sampling cores 312 are arranged at intervals along a second direction Y, where the second direction Y intersects the first direction X.

[0146] The sampling core 312 extends along the first direction X, which means that the entire sampling core 312 extends along the first direction X. The sampling core 312 can be a straight line set along the first direction X, or most of the area of ​​the sampling core 312 extends along the first direction X. The end of the sampling core 312 is set at an angle relative to the first direction X to facilitate connection to the connector.

[0147] The first direction X can be the arrangement direction of multiple battery cells 21 in the battery cell 21. In this way, multiple sampling wires 312 extend along the first direction X, so that multiple sampling wires 312 can be connected to multiple battery cells 21 in the battery cell assembly 20 through the busbar 33.

[0148] Multiple sampling cores 312 are arranged at intervals along the second direction Y to ensure that the multiple sampling cores 312 are insulated from each other. The multiple sampling cores 312 can be arranged at equal intervals, or the multiple sampling cores 312 can be arranged at non-equal intervals. The second direction Y can be perpendicular to the first direction X. In other embodiments, the second direction Y can also be inclined to the first direction X.

[0149] By adopting the above technical solution, the sampling body 31 includes multiple parallel and spaced sampling cores 312, and the sampling body 31 can collect the sampling signals of multiple battery cells 21 through the multiple sampling cores 312 respectively.

[0150] Referring to Figures 9 to 11, in some embodiments, an insulating adhesive (not shown) is provided between the two insulating films 311, and the insulating adhesive at least partially fills the space between any two adjacent sampling cores 312.

[0151] Multiple sampling wires 312 are located between two insulating films 311 and are arranged at intervals. These sampling wires 312 need to be insulated from each other and electrically connected to relevant structures of the battery management system to transmit electrical signals to the battery management system through the sampling body 31. Therefore, in this embodiment, insulating adhesive is provided between the two insulating films 311 to isolate adjacent sampling wires 312.

[0152] As shown in Figure 11, in some embodiments, the insulating adhesive can completely fill the gap between the sampling wire cores 312; in other embodiments, the insulating adhesive can partially fill the gap between the sampling wire cores 312, and the remaining portion of the insulating adhesive can be located between the sampling wire cores 312 and the insulating film 311.

[0153] The sampling body 31 provided in this application embodiment also includes insulating adhesive located between two insulating films 311. The insulating adhesive can bond the two insulating films 311, and the insulating adhesive at least partially fills between any two adjacent sampling wire cores 312 to achieve an insulating effect.

[0154] By adopting the above technical solution, multiple sampling cores 312 can be isolated and insulated with insulating glue, and adjacent sampling cores 312 are less likely to short-circuit, thus improving the stability of the sampling assembly 30.

[0155] In some embodiments, at least one insulating film 311 is a thin film with insulating adhesive.

[0156] Optionally, the insulating film 311 is a PI film with insulating adhesive. Optionally, both insulating films 311 are thin films with insulating adhesive. When making the sampling body 31, the two insulating films 311 are compositely connected with multiple sampling cores 312 by a flow-joining method, so that the insulating adhesive is filled between any two adjacent sampling cores 312.

[0157] By adopting the above technical solution, the sampling body 31 includes two insulating films 311 and a sampling core 312 disposed between the two insulating films 311. At least one insulating film 311 is covered with insulating adhesive. During manufacturing, the two insulating films 311 and the sampling core layer containing the sampling core 312 can be directly composited and connected without the need to isolate the sampling core 312 by coating with insulating adhesive. The sampling body 31 has a simple structure, is easy to manufacture, and has a low cost. Moreover, compared with sampling FPC, the sampling body 31 can be manufactured by direct composite method, which is simpler in structure and lower in cost.

[0158] In other embodiments, the insulating adhesive may also be an adhesive layer or a semi-cured sheet placed between two insulating films 311.

[0159] Referring to Figure 4, the adapter 32 spans multiple sampling cores 312; referring to Figures 13 to 22, the adapter 32 includes a conductive element 321 and the conductive element 321 is provided with multiple sampling connection portions 3211. The multiple sampling connection portions 3211 are spaced apart along the arrangement direction (second direction Y direction) of the sampling cores 312. The adapter 32 is connected to the sampling cores 312 through at least one sampling connection portion 3211.

[0160] The adapter 32 can extend along the second direction Y and span multiple sampling cores 312. Optionally, the adapter 32 can span all sampling cores 312 or some of the sampling cores 312.

[0161] If the adapter 32 is a voltage sampling adapter, the adapter 32 is connected to the sampling core 312 through a sampling connection part 3211; if the adapter 32 is a temperature sampling adapter, the adapter 32 is connected to two sampling cores 312 respectively through two sampling connection parts 3211.

[0162] The conductive component 321 can be a metal component such as copper, nickel, or aluminum, and can be a component that conducts electricity throughout. The sampling connection portion 3211 is the part of the conductive component 321 that can be connected to the sampling portion 3121. The sampling connection portion 3211 can be connected to the sampling portion 3121 by at least one method, such as welding or mechanical connection. If the sampling connection portion 3211 is connected to the sampling portion 3121 by welding, each sampling connection portion 3211 can be provided with one or more solder receiving holes 3212. If the sampling connection portion 3211 is connected to the sampling portion 3121 by mechanical connection, the sampling connection portion 3211 can be pre-set with connection holes, or it can be connected directly by piercing the terminal 34 without providing connection holes.

[0163] Since multiple sampling cores 312 are arranged at intervals along the second direction Y and the adapter 32 spans multiple sampling cores 312, by providing multiple sampling connection parts 3211 arranged at intervals along the second direction Y on the conductive part 321 of the adapter 32, the adapter 32 can be connected to a sampling core 312 through one of the sampling connection parts 3211, which improves the versatility of the adapter 32, reduces the types of adapters 32, and saves the design and material costs of the adapter 32.

[0164] It should be noted that the adapter 32 can also be connected to multiple sampling cores 312, so the adapter 32 can be connected to different sampling cores 312 through different sampling connection parts 3211.

[0165] Please refer to Figures 14 to 17. The adapter 32 also includes two insulating covering films 322 disposed on both sides of the conductive member 321. The covering films 322 are provided with a plurality of spaced through holes 3221, and each through hole 3221 exposes a corresponding sampling connection part 3211.

[0166] The adapter 32 can be a voltage sampling adapter 32a, a temperature sampling adapter 32b, etc. Both the voltage sampling adapter 32a and the temperature sampling adapter 32b can include a conductive element 321 and two layers of covering film 322.

[0167] The conductive component 321 can be a metal component such as copper, nickel, or aluminum. The cover film 322 covers the conductive component 321 to provide protection and insulation. The cover film 322 has a plurality of spaced-apart through holes 3221, which can be understood as being spaced apart along the second direction Y. Each through hole 3221 is used to expose a corresponding sampling connection part 3211, so that the sampling connection part 3211 can be directly connected to the sampling part 3121.

[0168] In some embodiments, the conductive element 321 is a copper core, which is easy to form; compared to an aluminum core, a copper core is less prone to breakage; and compared to a nickel core, a copper core has a lower cost. When the conductive element 321 is a copper core, copper pieces can be connected by soldering (laser soldering or hotbar soldering). Since soldering temperatures are relatively high, the cover film 322 can be made of PI film or other film materials with good temperature resistance. Optionally, the cover film 322 has adhesive, allowing the two layers of cover film 322 to be directly laminated to the conductive element 321 to form the adapter 32.

[0169] In some embodiments, the adapter 32 and the sampling body 31 are electrically connected by a puncture crimping method. The conductive element 321 in the adapter 32 may be nickel-plated copper to increase strength, or the thickness of the copper core may be increased. Optionally, after mechanical connection, an additional welding step may be added to improve reliability.

[0170] By adopting the above technical solution, the adapter 32 includes a conductive element 321 and two covering films 322. The covering films 322 can protect and insulate the conductive element 321. The through holes 3221 on the covering films 322 can expose the sampling connection part 3211. In this way, the adapter 32 can be electrically connected to the corresponding sampling core 312 through the sampling connection part 3211, while the adapter 32 can be insulated from other sampling cores 312.

[0171] In other embodiments, the covering film 322 may be omitted, or the covering film 322 may only cover a portion of the conductive element 321 (such as the fuse portion 324), and the insulating film 311 in the sampling body 31 may separate the sampling core 312 and the area of ​​the adapter 32 except for the sampling connection portion 3211.

[0172] Please refer to Figures 4 to 23. In some embodiments, there are multiple adapters 32. The sampling body 31 is provided with a row of adapters 32 on both sides along its width direction (second direction Y). Multiple adapters 32 in each row are spaced apart along the first direction X.

[0173] There are multiple sampling cores 312 and multiple adapters 32. One adapter 32 can be connected to one or more sampling cores 312. For example, the adapter 32 can be connected to one, two or four sampling cores 312.

[0174] The sampling body 31 has a row of adapters 32 on both sides along the second direction Y. Thus, the two rows of adapters 32 are respectively connected to the sampling wire core 312. The sampling component 30 can use the two rows of adapters 32 to sample at least two rows of battery cells 21. The sampling component 30 has a compact structure and occupies less space.

[0175] In some embodiments, the adapter 32 has a first portion 3201 covering the sampling body 31; along the width direction (second direction Y) of the sampling body 31, the size of at least one first portion 3201 of the adapter 32 is greater than or equal to half the size of the sampling body 31.

[0176] The adapter 32 includes a first part 3201, a second part 3202, and an intermediate part 3203 disposed between the first part 3201 and the second part 3202. The first part 3201 covers the sampling body 31 for connecting the sampling body 31, and the second part 3202 is used to connect the battery cell 21. Optionally, the first part 3201 covers the sampling body 31, and the second part 3202 covers the busbar 33.

[0177] The lengths of the multiple adapters 32 may be equal or unequal. For example, the lengths of the second part 3202 of the multiple adapters 32 may be equal, while the lengths of the first part 3201 may be unequal; of course, the multiple adapters 32 may also be set to the same size.

[0178] Optionally, the lengths of the first parts 3201 of the multiple adapters 32 are different, and the edges of the first parts 3201 of the multiple adapters 32 are aligned with the edges of the sampling body 31.

[0179] Along the second direction Y, the size of at least part of the first part 3201 of the adapter 32 is greater than or equal to half the size of the sampling body 31. Thus, the first part 3201 can extend from the edge of the sampling body 31 to at least the middle of the sampling body 31, so that the adapter 32 can be connected to a sampling wire core 312 through a preset opening, which further improves the design versatility of the adapter 32 and reduces the material cost of the adapter 32.

[0180] In some embodiments, the adapter 32 and the sampling unit 3121 are fixedly connected by at least one of welding and mechanical connection.

[0181] Please refer to Figures 6, 8, and 14. The adapter 32 can be connected to the sampling unit 3121 by welding. The welding method can be, for example, ultrasonic welding, laser welding, or hotbar welding. Ultrasonic welding uses high-density energy generated by high-frequency ultrasonic mechanical vibration to produce plastic deformation on the surface of the workpiece. Under pressure, the weld layer is broken, and the solder is physically connected at room temperature. Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Hotbar welding, also known as hot-press welding, is a common name for pulse-heated reflow soldering.

[0182] Thus, the adapter 32 can be fixedly connected to the sampling unit 3121 and the sampling body 31 by welding, and can also be electrically connected to the sampling unit 3121.

[0183] Please refer to Figures 18 to 22. The adapter 32 can also be mechanically connected to the sampling unit 3121, for example, by connecting the adapter 32 and the sampling unit 3121 through a connector such as a piercing terminal.

[0184] In addition, the adapter 32 can also be fixedly connected to the sampling unit 3121 by both welding and mechanical connection. For example, the adapter 32 can be connected to the sampling unit 3121 by mechanical connection first, and then welding can be used to improve the stability of the connection.

[0185] By adopting the above technical solution, since the sampling part 3121 is exposed on the surface of the sampling body 31, the sampling part 3121 can be fixedly connected and electrically connected to the adapter 32 in a variety of ways. The sampling component 30 provided in this application embodiment is flexible in manufacturing and has low industrialization difficulty, thereby reducing the overall manufacturing cost of the sampling component 30.

[0186] Please refer to Figures 8, 14 to 16. The adapter 32 is welded to the sampling part 3121. The adapter 32 is provided with one or more solder receiving holes 3212.

[0187] The solder is a low-melting-point metallic solder, such as a tin-based alloy. The solder is used to melt during the soldering process to securely connect two components to be soldered. The adapter 32 has one or more solder receiving holes 3212. For example, as shown in Figure 14, the adapter 32 is a voltage sampling adapter 32a, which has multiple sampling connection parts 3211 arranged side-by-side. The sampling connection parts 3211 are exposed through openings 3111 in the insulating film 311, and each sampling connection part 3211 has three solder receiving holes 3212. As shown in Figure 17, the adapter 32 is a temperature sampling adapter 32b, which has multiple sampling connection parts 3211, and each sampling connection part 3211 has one solder receiving hole 3212.

[0188] Thus, during the process of welding the adapter 32 to the sampling part 3121, the solder can be contained in the solder receiving hole 3212, improving the stability of the welding connection.

[0189] Referring to Figures 8, 18 to 22, in some embodiments, the adapter 32 is mechanically connected to the sampling unit 3121. The sampling assembly 30 also includes a piercing terminal 34, which passes through the adapter 32 and the sampling body 31, and the piercing terminal 34 abuts against and electrically connects the adapter 32 and the sampling unit 3121.

[0190] The piercing terminal 34 is a conductive element capable of piercing and connecting. In this embodiment, the piercing terminal 34 can simultaneously pierce the sampling body 31 and the adapter 32 to fix the adapter 32 and electrically connect it to the sampling core 312. For example, the piercing terminal 34 includes a terminal body and a pointed portion disposed on the terminal body. The terminal body is located on the side of the sampling body 31 facing away from the adapter 32, and the pointed portion connects to the adapter 32 after piercing the sampling body 31. Furthermore, the opening 3111 in the insulating film 311 exposes the sampling portion 3121. The piercing terminal 34 passes through the opening 3111, resulting in a large contact area between the piercing terminal 34 and the sampling core 312, thus improving connection reliability.

[0191] By adopting the above technical solution, the adapter 32 can be fixed and electrically connected to the sampling core 312 by piercing the terminal 34. The connection method between the adapter 32 and the sampling body 31 is relatively simple, easy to manufacture, and has a low production cost.

[0192] Referring to Figure 12, in some embodiments, the sampling assembly 30 further includes a protective film 35 that covers the connection between the adapter 32 and the sampling body 31.

[0193] The connection point between the adapter 32 and the sampling body 31 refers to the overlapping portion of the adapter 32 and the sampling body 31. When there are multiple adapters 32, the protective film 35 can be elongated and directly covers the surface of the sampling body 31 and the overlapping portion of each adapter 32 and the sampling body 31.

[0194] By setting a protective film 35, the sampling component 30 can protect the connection between the adapter 32 and the sampling body 31, which can reduce the risk of deformation at the connection and protect the connection from being punctured by humans.

[0195] Referring to Figures 3 to 6, in some embodiments, the sampling assembly 30 further includes a busbar 33, which is electrically connected to the electrode terminals of the battery cell 21, and the end of the adapter 32 away from the sampling body 31 is fixedly connected to the busbar 33.

[0196] The busbar 33 is used to electrically connect two adjacent battery cells 21. The busbar 33 can be an aluminum busbar. One end of the adapter 32 is fixedly connected to the sampling body 31 and electrically connected to the sampling part 3121 of the sampling wire core 312. The other end of the adapter 32 is fixedly connected to the busbar 33. In this way, the sampling body 31 can collect the sampling signal of the battery cell 21 through the adapter 32 and the busbar 33.

[0197] The busbar 33 is mounted on the support member 36, as shown in Figures 5 and 6. In some embodiments, the adapter 32 is connected above the busbar 33, and the busbar 33 is located above the support member 36, that is, the adapter 32 is connected to the side of the busbar 33 facing away from the support member 36. Referring to Figures 23 and 24, in other embodiments, the adapter 32 may also be connected below the busbar 33, that is, the adapter 32 is connected to the side of the busbar 33 facing the support member 36, and the support member 36 can reinforce the connection between the adapter 32 and the busbar 33.

[0198] The sampling component 30 provided in this application embodiment also includes a busbar 33. The two ends of the adapter 32 are fixedly connected to the sampling body 31 and the busbar 33 respectively, so that the sampling body 31 can collect the sampling signal of the battery cell 21 through the adapter 32 and the busbar 33.

[0199] The adapter 32 can be fixedly connected to the busbar 33 by at least one of the following connection methods: welding, bonding, snap-fitting, and hot riveting.

[0200] In some embodiments, the adapter 32 is connected to the busbar 33 by ultrasonic welding or laser welding. After welding, adhesive can be applied to the weld between the adapter 32 and the busbar 33 to improve the connection reliability between the adapter 32 and the busbar 33.

[0201] The adapter 32 can be fixedly connected to the busbar 33 in various ways, and the sampling component 30 is flexible and easy to manufacture.

[0202] Referring to Figures 14 to 17, in some embodiments, the adapter 32 is provided with a weak portion 323, which is configured to deform as the battery cell expands and deforms.

[0203] The number of weak parts 323 can be one or more. For example, as shown in FIG14, the adapter 32 is provided with two spaced and opposite weak parts 323.

[0204] Optionally, referring to Figure 21, the adapter 32 includes a first part 3201 covering the sampling body 31, a second part 3202 connected to the busbar, and an intermediate part 3203 connected between the first part 3201 and the second part 3202. The weak part 323 is located in the intermediate part 3203 to facilitate deformation.

[0205] The thickness of the weak portion 323 is less than the thickness of the region adjacent to the weak portion 323, thus the weak portion 323 is easy to deform. During the charging and discharging process of the battery device 100, the battery cell 21 may expand, causing the adapter 32 to be affected by the expansion force. By providing the weak portion 323 on the adapter 32, the weak portion 323 can deform to accommodate the expansion of the battery cell 21, reducing the risk of tearing of the adapter 32 and reducing the risk of connection failure between the adapter 32 and the battery cell 21 or the busbar 33.

[0206] In some embodiments, the weak portion 323 is a curved perforated hole.

[0207] As shown in Figure 14, the weak part 323 is a hollow hole penetrating the adapter 32. The hollow hole is curved to facilitate deformation. For example, the hollow hole includes a first hole and a second hole connected together. The first hole extends along a first direction X, and the second hole extends along a second direction Y or in a direction inclined to the second direction Y to facilitate deformation of the hollow hole.

[0208] Optionally, as shown in Figures 14 and 15, the adapter 32 is provided with a fusible part 324, and two weak parts 323 are respectively provided on both sides of the fusible part 324.

[0209] By adopting the above technical solution, it is convenient to make a weak part 323 on the adapter 32, and the weak part 323 has good deformation capability, which can better adapt to the deformation of the battery cell 21.

[0210] Please refer to Figures 4 and 23. In some embodiments, the sampling component 30 further includes a carrier 36, and the sampling body 31 and the adapter 32 are both disposed on the carrier 36.

[0211] The carrier 36 can support the sampling body 31 and the adapter 32, so that the sampling assembly 30 forms an integral part. When there are multiple sampling bodies 31 and multiple adapters 32, multiple sampling bodies 31 and multiple adapters 32 are all disposed on the surface of the carrier 36. The carrier 36 is disposed at the bottom of the sampling body 31 and the adapter 32, that is, the carrier 36 is disposed on the side of the sampling body 31 near the battery cell 21.

[0212] The sampling component 30 provided in this application embodiment also includes a carrier 36, which can conveniently connect the sampling component 30 to the battery cell assembly 20, and the carrier 36 can reduce the risk of oxidation and corrosion of the sampling component 30.

[0213] In some embodiments, the carrier 36 is an insulating film layer or a thermoformed board.

[0214] If the carrier 36 is an insulating film layer, the carrier 36 can be fixed to the sampling body 31 and the adapter 32 by means of bonding, hot pressing or other methods; if the carrier 36 is a blister board, the busbar 33 can also be fixed to the blister board by hot riveting.

[0215] During the assembly of the battery device 100, the sampling component 30 can be pre-assembled and then connected to the top of the battery cell assembly 20.

[0216] By adopting the above technical solution, the structure of the bearing component 36 is simple and easy to assemble.

[0217] Referring to Figures 4 to 24, in some embodiments, the adapter 32 includes a conductive element 321, and there are multiple adapters 32. The multiple adapters 32 include a voltage sampling adapter 32a, and the conductive element 321 of the voltage sampling adapter 32a is electrically connected to at least one sampling core 312.

[0218] The voltage sampling adapter 32a is an adapter 32 used to collect the voltage sampling signal of the battery cell 21, and each voltage sampling adapter 32a is connected to at least one sampling core 312.

[0219] As shown in Figures 13 and 14, the voltage sampling adapter 32a can be electrically connected to the sampling part 3121 of the sampling core 312 by welding; as shown in Figures 18 to 22, the voltage sampling adapter 32a can be electrically connected to the sampling part 3121 of the sampling core 312 by mechanical connection such as piercing and crimping.

[0220] In some embodiments, one end of the voltage sampling adapter 32a is fixed and electrically connected to the sampling unit 3121, and the other end of the voltage sampling adapter 32a is fixed and electrically connected to the busbar 33; in other embodiments, the end of the voltage sampling adapter 32a away from the sampling body 31 may also be directly connected to the battery cell 21.

[0221] The adapter 32 provided in this application embodiment includes a voltage sampling adapter 32a, so that the sampling component 30 can collect the voltage sampling signal of the battery cell 21, which facilitates monitoring the status of the battery cell 21.

[0222] Referring to Figures 14 to 16, in some embodiments, the conductive element 321 of the voltage sampling adapter 32a includes a fuse 324, which is used to disconnect when the current in the battery cell 21 connected to the sampling core 312 exceeds a threshold.

[0223] The cross-sectional area of ​​the fuse 324 is smaller than that of other areas of the conductive element 321, and the current-passing area of ​​the fuse 324 is also smaller than that of other areas of the conductive element 321. During the sampling process of the voltage sampling adapter 32a, if the current in the battery cell 21 exceeds the threshold, the fuse 324 can disconnect, thereby disconnecting the circuit between the battery cell 21 and the sampling body 31, thus effectively protecting the sampling assembly 30 and the battery device.

[0224] By incorporating a fuse 324 in the voltage sampling adapter 32a, overcurrent protection can be achieved, thereby improving safety and reliability.

[0225] Please refer to Figures 13, 15, and 16. In some embodiments, the fuse portion 324 has a bent structure, and the voltage sampling adapter 32a also includes two weak portions 323. Along the extension direction of the sampling core, the two weak portions 323 are located on both sides of the fuse portion 324.

[0226] The fusible portion 324 has a curved structure, for example, the fusible portion 324 has an S-shaped curved structure; the fusible portion 324 has curved weak portions 323 on both sides along the extension direction (first direction X) of the sampling core, the weak portions 323 can be hollow holes, the sampling adapter 32a also includes a covering film 322, the covering film 322 covers at least the fusible portion 324, in some embodiments, the covering film 322 is hollowed out in the weak portions 323.

[0227] By adopting the above technical solution, the voltage sampling adapter 32a is provided with a fuse part 324 and a weak part 323, which can not only realize overcurrent protection and prevent tearing and deformation, but also effectively utilize the layout space on the voltage sampling adapter 32a, which is conducive to reducing the size of the voltage sampling adapter 32a.

[0228] Referring to Figures 14, 17 to 19, and 22, in some embodiments, the plurality of adapters 32 include a temperature sampling adapter 32b. The temperature sampling adapter 32b includes a temperature detection element 325 and at least two conductive elements 321 connected to the temperature detection element 325. Each conductive element 321 is provided with a sampling connection portion 3211. The temperature sampling adapter 32b is electrically connected to two sampling elements 3121 through the two sampling connection portions 3211.

[0229] Temperature sampling adapter 32b is an adapter 32 used to acquire temperature sampling signals. Temperature sampling adapter 32b includes a temperature sensing element 325, which may include a thermistor (NTC). A thermistor is a resistor whose resistance changes with temperature. Its temperature detection principle is based on the temperature sensitivity of the material; when the temperature rises, the resistance of the thermistor decreases; when the temperature decreases, the resistance increases. In the temperature detection application of battery cell 21, the thermistor is connected to the sampling core 312. The battery management system can measure the resistance change of the thermistor to determine the temperature of battery cell 21 and / or bus 33.

[0230] The temperature detection element 325 has a positive electrode and a negative electrode. The positive electrode and the negative electrode of the temperature detection element 325 are respectively electrically connected to a conductive element 321. Each conductive element 321 is provided with a sampling connection part 3211, so as to be connected to the sampling part 3121 of a sampling wire core 312 through the sampling connection part 3211.

[0231] By adopting the above technical solution, the sampling component 30 can collect the temperature sampling signal of the battery cell 21, which facilitates the monitoring of the status of the battery cell 21 and improves the reliability of the battery device 100.

[0232] In some embodiments, the temperature sampling adapter 32b can be fixedly connected to the busbar 33 by snap-fit. In other embodiments, the temperature sampling adapter 32b can also be fixedly connected to the busbar 33 or the battery cell 21 by bonding, welding or other methods.

[0233] Referring to Figures 4, 14, and 17, in some embodiments, in the temperature sampling adapter 32b, at least two conductive elements 321 are spaced apart along the extension direction of the sampling core 312, and / or, the sampling connection portions 3211 on the two conductive elements 321 are staggered in a direction perpendicular to the sampling core 312.

[0234] The temperature sampling adapter 32b may include multiple conductive elements 321 spaced apart along a first direction X. For example, as shown in Figures 14 and 17, the conductive elements 321 include two conductive elements 321 arranged in parallel. In this way, the temperature sampling adapter 32b can be electrically connected between the temperature detection element 325 and the sampling unit 3121 through two of the conductive elements 321, thereby improving the design versatility of the temperature sampling adapter 32b.

[0235] The conductive element 321 is provided with one or more sampling connection portions 3211, and the sampling connection portions 3211 on two conductive elements 321 are staggered in a direction perpendicular to the sampling core 312. For example, as shown in Figures 14 and 17, one conductive element 321 is provided with two sampling connection portions 3211, and the other conductive element is provided with three sampling connection portions 3211. The sampling connection portions 3211 on the two conductive elements 321 are staggered in the second direction Y, which can reduce the risk of short circuit between the two sampling connection portions 3211.

[0236] By adopting the above technical solution, the versatility of the temperature sampling adapter 32b is improved, which helps to reduce the types of temperature sampling adapters 32b.

[0237] In some embodiments, the temperature sampling adapter 32b is provided with adhesive at the connection between the sampling connection 3211 and the sampling part 3121.

[0238] Temperature sampling adapter 32b can be connected to sampling part 3121 by welding or mechanical connection. As shown in Figure 14, the sampling connection part 3211 of temperature sampling adapter 32b is welded to sampling part 3121. After welding, adhesive is applied to the connection between sampling connection part 3211 and sampling part 3121 to reduce the risk of short circuit between the two sampling connection parts 3211. The circle in Figure 14 indicates the adhesive application location. As shown in Figure 19, the sampling connection part 3211 of temperature sampling adapter 32b is connected to sampling part 3121 by puncture and crimping. Adhesive can also be applied at the crimping point. The circle in Figure 19 indicates the adhesive application location.

[0239] By adopting the above technical solution, short circuits are less likely to occur between the two sampling connection parts 3211 of the temperature sampling adapter 32b, which improves the reliability of the temperature sampling adapter 32b and enhances the pull-out force of the solder joint.

[0240] Referring to Figures 14, 17, and 22, in some embodiments, the temperature sampling adapter 32b further includes an annular reinforcing member 326, which surrounds the periphery of the temperature sensing member 325 and is higher than the temperature sensing member 325.

[0241] The reinforcing member 326 can be a square ring structure, which is simple and easy to implement. In some embodiments, the reinforcing member 326 can also be a circular, prismatic, triangular, or other structures. A potting compound 327 is provided inside the reinforcing member 326, covering the temperature sensing element 325. This not only effectively protects the temperature sensing element 325 from water ingress and moisture, improving safety and reliability, but also makes temperature transmission more uniform, resulting in more accurate temperature readings from the temperature sensing element 325. The potting compound 327 can be made of UV adhesive or thermosetting adhesive, such as epoxy resin, but is not limited to these methods.

[0242] By incorporating a reinforcing member 326 in the temperature sampling adapter 32b, the risk of the temperature sensing element 325 being damaged by pressure is reduced.

[0243] Referring to Figures 23 to 26, one end of each of the multiple sampling cores 312 extends to the same side of the sampling body 31 to form an output port 301 on one side of the sampling body 31. At least one insulating film 311 has an opening 3113 that exposes the output port 301. The sampling assembly 30 also includes a connector plug 37, which is connected to the output port 301 through the opening 3113.

[0244] Multiple sampling wires 312 are arranged side by side, with one end of each wire extending to the same side of the sampling body 31 along the first direction X, forming an output port 301. A connector is connected to the output port 301, so that the signal collected by the sampling body 31 can be output through the connector. For example, the connector is also used to connect to a battery management system to electrically connect the sampling body 31 to the battery management system.

[0245] In some embodiments, at least one insulating film 311 has a window 3113, which exposes the output port 301. The connector window connects to the output port 301 through the window 3113, resulting in a large contact area and good connection reliability. For example, the window 3113 is provided in the insulating film 311 on the side of the sampling body 31 closest to the carrier, or in the insulating film 311 on the side of the sampling body 31 furthest from the carrier. Alternatively, corresponding windows 3113 can be provided in the insulating films 311 on both sides.

[0246] By adopting the above technical solution, an output port 301 is formed on one side of the sampling body 31, and the signal collected by the sampling core 312 can be output to the outside through the connector. The sampling component 30 has a simple structure and is easy to assemble.

[0247] Referring to Figures 23 to 29, in some embodiments, the connector plug 37 is crimped, plugged in, or soldered to the output port 301.

[0248] As shown in Figures 26 and 27, the connector plug 37 is crimped to the output port 301. For example, the output port 301 of the sampling body 31 is connected to the connector plug 37 via a piercing terminal 34, and the other end of the connector plug 37 is connected to the horizontal board connector 41.

[0249] As shown in Figures 26 and 28, the connector plug 37 is inserted into the output port 301. For example, the connector plug 37 has gold fingers, the output port 301 is inserted into the connector plug 37 and electrically connected to the gold fingers, and the other end of the connector plug 37 is inserted into the board connector 42.

[0250] As shown in Figures 26 and 29, the connector plug 37 is soldered to the output port 301, and the soldering method is, for example, wave soldering, laser soldering, ultrasonic soldering, etc. For example, the output port 301 is soldered to the connector plug 37, and the connector plug 37 is connected to the vertical board-end connector 43.

[0251] By adopting the above technical solution, the connector plug 37 and the output port 301 can be connected in a variety of ways, which is easy to implement.

[0252] Referring to Figures 2 to 29, some embodiments of this application provide a battery device 100, including a battery cell assembly 20 and a sampling assembly 30. The battery cell assembly 20 includes a plurality of battery cells 21 arranged sequentially along a first direction X. The sampling assembly 30 includes a sampling body 31 and an adapter 32. The sampling body 31 includes two opposing insulating films 311 and a plurality of sampling wires 312 disposed between the two insulating films 311. The sampling wires 312 extend along the first direction X, and the plurality of sampling wires 312 are arranged at intervals along a second direction Y, which intersects the first direction X. The sampling wires 312 include sampling portions 3121, which are exposed on the surface of the insulating films 311. One end of the adapter 32 is fixedly connected to and electrically connected to the sampling portions 3121, and the other end is used to collect sampling signals from the battery cells 21. At least one insulating film 311 has an opening 3111, which exposes the sampling portions 3121. The adapter 32 is fixedly connected to the sampling unit 3121 by at least one of welding and mechanical connection, and the end of the adapter 32 away from the sampling unit 3121 is fixedly connected to the battery cell 21 or the busbar 33.

[0253] In the battery device 100 provided in this application embodiment, the sampling body 31 includes two opposing insulating films 311 and multiple sampling wires 312 disposed between the two insulating films 311. The sampling portion 3121 of the sampling wire 312 can be exposed on the surface of the insulating film 311, so that the sampling portion 3121 can be electrically connected to the adapter 32. At the same time, the other end of the adapter 32 can collect the sampling signal of the battery cell 21. Thus, the sampling wire 312 can collect the sampling signal of the battery cell 21 through the adapter 32. The battery device 100 described above does not require bending the wires to achieve electrical connection between the wires and the battery cell 21, solving the problems of high bending process difficulty and low manufacturing efficiency of flexible flat wires, and reducing the manufacturing cost of the sampling component 30 and the battery device.

[0254] The second aspect of this application provides a sampling component 30, which is the sampling component 30 in the battery device as provided in the first aspect embodiment.

[0255] In some embodiments, the sampling assembly 30 includes a sampling body 31 and an adapter 32. The sampling body 31 includes two opposing insulating films 311 and multiple sampling wires 312 disposed between the two insulating films 311. The multiple sampling wires 312 are arranged at intervals. Each sampling wire 312 includes a sampling portion 3121. At least one insulating film 311 has an opening 3111, through which the sampling portion 3121 is exposed on the surface of the insulating film 311. One end of the adapter 32 is fixedly connected to the sampling portion 3121 and electrically connected to the sampling portion 3121, and the other end is used to collect the sampling signal of the battery cell 21.

[0256] In some embodiments, the sampling core 312 extends along a first direction X, and multiple sampling cores 312 are arranged at intervals along a second direction Y, the second direction Y intersecting the first direction X; an insulating adhesive is provided between the two insulating films 311, and the insulating adhesive at least partially fills the space between any two adjacent sampling cores 312.

[0257] A third aspect of this application provides an energy storage device including a plurality of battery devices 100 as provided in the first aspect or sampling components 30 as provided in the second aspect, wherein the battery devices 100 are used to store or provide electrical energy.

[0258] The fourth aspect of this application provides an electrical device, including a battery cell 20 of the first aspect, a battery device 100 of the second aspect, or an energy storage device of the third aspect, wherein the battery device 100 is used to provide electrical energy to the electrical device.

[0259] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0260] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery device, wherein, include: A battery cell assembly, comprising multiple battery cells; A sampling assembly includes a sampling body and an adapter. The sampling body includes two opposing insulating films and multiple sampling wires disposed between the two insulating films. The multiple sampling wires are arranged at intervals. Each sampling wire includes a sampling portion. At least one insulating film has an opening, through which the sampling portion is exposed on the surface of the insulating film. One end of the adapter is fixedly connected to the sampling portion and electrically connected to the sampling portion, and the other end is used to collect the sampling signal of the battery cell.

2. The battery device as claimed in claim 1, wherein, The sampling core extends along a first direction, and multiple sampling cores are arranged at intervals along a second direction, which intersects with the first direction.

3. The battery device as claimed in claim 1 or 2, wherein, An insulating adhesive is provided between the two insulating films, and the insulating adhesive at least partially fills the space between any two adjacent sampling wire cores.

4. The battery device as claimed in claim 3, wherein, At least one of the insulating films is a thin film with insulating adhesive.

5. The battery device according to any one of claims 1-4, wherein, The sampling wire core is a metal wire core.

6. The battery device according to any one of claims 1-5, wherein, The adapter spans multiple sampling wires; the adapter includes a conductive element and the conductive element is provided with multiple sampling connection parts, the multiple sampling connection parts are spaced apart along the arrangement direction of the sampling wires, and the adapter is connected to the sampling wires through at least one of the sampling connection parts.

7. The battery device as claimed in claim 6, wherein, The adapter also includes two insulating covering films disposed on both sides of the conductive element. The covering films are provided with a plurality of spaced through holes, each of which exposes a corresponding sampling connection portion.

8. The battery device according to any one of claims 1-7, wherein, The number of adapters is multiple, and the sampling body has a row of adapters on both sides along its width direction, with multiple adapters in each row spaced apart along the first direction.

9. The battery device as claimed in claim 8, wherein, The adapter has a first part covering the sampling body; Along the width direction of the sampling body, the size of the first part of at least one of the adapters is greater than or equal to half the size of the sampling body.

10. The battery device according to any one of claims 1-9, wherein, The adapter is fixedly connected to the sampling unit by at least one of welding and mechanical connection.

11. The battery device of claim 10, wherein, The adapter is welded to the sampling unit, and the adapter is provided with one or more solder receiving holes.

12. The battery device as claimed in claim 10 or 11, wherein, The sampling assembly further includes a piercing terminal, which passes through the adapter and the sampling body, and the piercing terminal abuts against and electrically connects the adapter and the sampling part.

13. The battery device according to any one of claims 1-12, wherein, The sampling component also includes a protective film that covers the connection between the adapter and the sampling body.

14. The battery device according to any one of claims 1-13, wherein, The sampling assembly also includes a busbar, which is electrically connected to the electrode terminals of the battery cell, and the end of the adapter away from the sampling body is fixedly connected to the busbar.

15. The battery device of claim 14, wherein, The adapter is fixedly connected to the manifold by at least one of the following connection methods: welding, bonding, snap-fitting, and hot riveting.

16. The battery device according to any one of claims 1-15, wherein, The adapter has a weak part, which is configured to deform as the battery cell expands and deforms.

17. The battery device of claim 16, wherein, The weak part is a curved, hollowed-out hole.

18. The battery device according to any one of claims 1-17, wherein, The sampling component also includes a carrier, and the sampling body and the adapter are both disposed on the carrier. The carrier includes an insulating film layer or a blister board.

19. The battery device according to any one of claims 1-18, wherein, The adapter includes a conductive element; there are multiple adapters, and the multiple adapters include a voltage sampling adapter, wherein the conductive element of the voltage sampling adapter is electrically connected to at least one sampling core.

20. The battery device of claim 19, wherein, The conductive element of the voltage sampling adapter includes a fuse portion, which is used to disconnect when the current flowing through the conductive element exceeds a threshold.

21. The battery device of claim 20, wherein, The fuse is a bent structure, and the voltage sampling adapter also includes two weak parts, which are located on both sides of the fuse along the extension direction of the sampling core.

22. The battery device according to any one of claims 1-21, wherein, The adapter includes a temperature sampling adapter, which includes a temperature detection element and at least two conductive elements electrically connected to the temperature detection element. Each conductive element is provided with a sampling connection portion, and the temperature sampling adapter is electrically connected to two sampling elements through the two sampling connection portions.

23. The battery device of claim 22, wherein, In the temperature sampling adapter, at least two of the conductive elements are spaced apart along the extension direction of the sampling wire core, and / or, The sampling connection portions on the two conductive elements are staggered in a direction perpendicular to the sampling wire core.

24. The battery device as claimed in claim 22 or 23, wherein, The temperature sampling adapter has adhesive at the connection between the sampling connection part and the sampling part.

25. The battery device according to any one of claims 1-24, wherein, One end of each of the multiple sampling wires extends to the same side of the sampling body to form an output port on one side of the sampling body. At least one layer of the insulating film has an opening that exposes the output port. The sampling assembly also includes a connector plug that is connected to the output port through the opening.

26. The battery device of claim 25, wherein, The connector plug is crimped, plugged in, or soldered to the output port.

27. A sampling component, wherein, The sampling assembly includes a sampling body and an adapter. The sampling body includes two opposing insulating films and multiple sampling wires disposed between the two insulating films. The multiple sampling wires are arranged at intervals. Each sampling wire includes a sampling section. At least one insulating film has an opening, through which the sampling section is exposed on the surface of the insulating film. One end of the adapter is fixedly connected to the sampling section and electrically connected to the sampling section, and the other end is used to collect the sampling signal of a single battery cell.

28. The sampling component of claim 27, wherein, The sampling line extends along a first direction, and multiple sampling lines are arranged at intervals along a second direction, which intersects with the first direction; an insulating adhesive is provided between the two layers of the insulating film, and the insulating adhesive at least partially fills the space between any two adjacent sampling lines.

29. An energy storage device, wherein, Includes a battery device as described in any one of claims 1-26 or a sampling component as described in any one of claims 27-28, wherein the battery device is used to store or provide electrical energy.

30. An electrical appliance, wherein, Includes a battery device as described in any one of claims 1-26, a sampling component as described in any one of claims 27-28, or an energy storage device as described in claim 29, wherein the battery device is used to store or provide electrical energy.

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