Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The battery device includes: a case; the battery monomers are arranged in the box body; the low-voltage acquisition assembly is arranged in the box body, the low-voltage acquisition assembly is used for acquiring working state parameters of the battery monomers, and the working state parameters comprise voltage and temperature; wherein the low-voltage acquisition assembly comprises a first sampling piece, and the first sampling piece is connected with the single battery so as to acquire the voltage of the single battery; one end of the second sampling piece is detachably connected with the first sampling piece so as to transmit the voltage; the third sampling piece is detachably connected with the other end of the second sampling piece so as to transmit the voltage; and the fourth sampling piece is connected with the second sampling piece so as to collect the temperature of the single battery.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] With the widespread use of batteries, batteries need to be frequently charged and discharged during use, which may cause failures during long-term use, making maintenance of related battery devices inconvenient. Utility Model Content

[0004] The present invention provides a battery device and an electrical device to solve the technical problem of reducing the difficulty of battery device maintenance. The present invention provides a battery device, including:

[0005] Box;

[0006] A battery cell is disposed in the box;

[0007] A low-voltage collection component is disposed in the box, and is used to collect operating state parameters of the battery cells, wherein the operating state parameters include voltage and temperature;

[0008] Wherein, the low-voltage collection component includes:

[0009] a first sampling component connected to the battery cell to collect the voltage of the battery cell;

[0010] a second sampling component, one end of which is detachably connected to the first sampling component to transmit the voltage;

[0011] a third sampling component, the third sampling component being detachably connected to the other end of the second sampling component to transmit the voltage;

[0012] A fourth sampling member is connected to the second sampling member to collect the temperature of the battery cell.

[0013] An embodiment of the present application provides a battery device, which includes a housing, battery cells, and a low-voltage collection assembly. The battery cells are disposed within the housing, and the low-voltage collection assembly is disposed within the housing. The low-voltage collection assembly is used to collect operating state parameters of the battery cells, including voltage and temperature. The low-voltage collection assembly includes a first sampling member, a second sampling member, and a third sampling member. The first sampling member is connected to the battery cells to collect the voltage of the battery cells. One end of the second sampling member is detachably connected to the first sampling member to transmit voltage. The third sampling member is detachably connected to the other end of the second sampling member to transmit voltage. The fourth sampling member is connected to the second sampling member to collect the temperature of the battery cells. In the embodiment of the present application, a second sampling component that is detachably connected is provided between the first sampling component and the second sampling component. In the event of sampling failure or other situations requiring maintenance of the low-voltage sampling component, the second sampling component can be separated from the first sampling component and the third sampling component, making it easy to directly replace the second sampling component or the third sampling component without having to replace the first sampling component, thereby reducing the maintenance difficulty and cost of the battery device and improving the maintenance efficiency of the low-voltage sampling component. The fourth sampling component is connected to the second sampling component. In the event that the fourth sampling component is blown, the second sampling component can be directly disassembled to replace the fourth sampling component and the second sampling component without having to replace the entire battery device or the entire low-voltage sampling component, thereby reducing the maintenance cost of the battery device.

[0014] In some embodiments, the fourth sampling member is disposed opposite to the battery cell in a first direction, wherein the first direction is a height direction of the battery cell.

[0015] In the embodiments of the present application, by positioning the fourth sampling member relative to the battery cell in a first direction, the accuracy of the temperature collected by the fourth sampling member is improved, thereby improving the operating efficiency of the battery device. In some embodiments, the battery cell includes a housing and an insulating layer, the insulating layer covering the outer surface of the housing, and the insulating layer is at least partially provided with a window to expose the housing, forming a window area; the fourth sampling member is positioned relative to the window area.

[0016] The embodiment of the present application provides a window area of ​​the insulating layer on the shell of the battery cell, which can not only meet the insulation requirements of other positions on the shell, but also the fourth sampling member is arranged relative to the window area, reducing the risk of heat being isolated by the insulating layer, which is conducive to improving the accuracy of the fourth sampling member in sampling the battery cell temperature.

[0017] In some embodiments, the fourth sampling member is disposed on a side of the second sampling member away from the battery cell in the first direction.

[0018] The embodiment of the present application arranges the fourth sampling member on a side of the second sampling member away from the battery cell in the first direction. While ensuring that the fourth sampling member can perform the temperature sampling function of the battery cell, the interference of the installation of the fourth sampling member on the battery cell can be reduced, which is beneficial to improving the space utilization of the assembly and further improving the energy density of the battery device.

[0019] In some embodiments, the battery further comprises:

[0020] A heat conducting member is provided between the second sampling member and the battery cell in the first direction.

[0021] In the embodiment of the present application, a heat conducting member is disposed between the second sampling member and the battery cell. The heat conducting member can transfer the heat of the battery cell to the second sampling member, so that the second sampling member can accurately collect the temperature of the battery cell, thereby improving the efficiency of the battery device.

[0022] In some embodiments, the second sampling component is provided with a fuse structure, and the fuse structure is used to provide fuse protection for the low-voltage sampling component.

[0023] In the embodiment of the present application, the fuse structure is arranged on the second sampling part, and the layout of the fuse structure is more flexible. Moreover, when a certain fuse structure is blown, the second sampling part can be disassembled and replaced alone without replacing the first sampling part and the third sampling part, thereby reducing the need to replace the first sampling part and the third sampling part at the same time, and further reducing the battery maintenance cost.

[0024] In some embodiments, the second sampling component is provided with at least two fuse structures, and the at least two fuse structures are used to respectively provide fuse protection for the low-voltage sampling component.

[0025] In the embodiment of the present application, multiple fuse structures are provided on the second sampling component. After one fuse structure on the second sampling component blows, there is no need to replace the second sampling component. Only the connection position or connection state of the second sampling component needs to be adjusted. This can enable the other fuse structures on the second sampling component to continue to blow and protect the first sampling component and the third sampling component, thereby reducing the maintenance cost of the second sampling component and improving the maintenance efficiency of the battery device.

[0026] In some embodiments, among the at least two fuse structures, one fuse structure is connected to the first sampling component and the third sampling component, and the other fuse structure is disconnected from the first sampling component and the third sampling component.

[0027] In the embodiment of the present application, multiple fuse structures are arranged on the same second sampling component. After one of the fuse structures blows, there is no need to disassemble and replace the second sampling component. It is only necessary to change the connection state of different fuse structures in the second sampling component and the first sampling component and the third sampling component to achieve new fuse protection, thereby reducing the maintenance cost of the low-voltage protection component and improving the maintenance efficiency of the battery device.

[0028] In some embodiments, the low-voltage collection assembly further includes a first base, the first base is fixed to the third sampling piece, and the second sampling piece is detachably connected to the first base, so that the at least two fuse structures can respectively provide fuse protection for the low-voltage collection assembly.

[0029] The embodiment of the present application makes the second sampling part and the first base detachable, which is beneficial to improving the efficiency of replacing the fuse structure in the second sampling part after it is blown. The connection state of the second sampling part and the first base can be quickly adjusted by disassembly and assembly, thereby improving the efficiency of maintenance of the second sampling part.

[0030] In some embodiments, the first base is provided with a plurality of limiting cavities, the number of the limiting cavities being the same as the number of the fuse structures, and the second sampling piece is inserted into one of the plurality of limiting cavities to achieve connection between one of the fuse structures and the first sampling piece and the third sampling piece.

[0031] In the embodiment of the present application, a plurality of limiting cavities corresponding to the number of fuse structures are provided on the first base, so that each limiting cavity can correspond to a fuse structure. When the second sampling piece is inserted into a limiting cavity, the conduction between the fuse structure and the circuit in the second sampling piece can be achieved. The setting of the limiting cavity is conducive to improving the stability of the installation of the second sampling piece, and is also conducive to improving the connection stability of the circuit where the fuse structure is located.

[0032] In some embodiments, the first base is configured as an insulator, each of the limiting cavities is provided with a contact, the second sampling member is inserted into the limiting cavity, and the contact electrically connects one of the fuse structures and the third sampling member.

[0033] In the embodiment of the present application, the first base is set as an insulator, and the fuse structure and the third sampling member are electrically connected through contacts in the limiting cavity, which helps to reduce the risk of battery cell creepage.

[0034] In some embodiments, the plurality of limiting cavities in the first base are arranged sequentially in the first direction.

[0035] The embodiment of the present application arranges multiple limiting cavities in the first base in sequence in the height direction, which is conducive to matching the direction of convenient movement of the second sampling piece, thereby improving the convenience of disassembly and assembly of the second sampling piece, and further improving the reliability of the connection between the second sampling piece and the first base.

[0036] In some embodiments, the first base includes a main body and a partition, the main body is hollow, the partition is arranged in the main body to divide the main body into two limiting cavities, and the contact is arranged on the inner wall surface of each main body close to the limiting cavity.

[0037] In the embodiment of the present application, the first base is configured as a main body portion and a partition portion, and the partition portion divides the interior of the main body portion into two limiting cavities. Whenever the second sampling member is connected to one of the limiting cavities, electrical contact is achieved between a fuse structure and a contact in the limiting cavity. This connection method is stable and highly reliable, and is convenient to assemble and disassemble.

[0038] In some embodiments, the contact is disposed on a first inner wall surface of the main body portion, and the first inner wall surface is disposed opposite to the partition portion in the first direction.

[0039] In the embodiment of the present application, by setting the contact on the first inner wall surface of the main body, when the second sampling member is inserted into different limiting cavities, the two surfaces of the second sampling member that are opposite in the first direction can respectively contact different inner wall surfaces. Specifically, the partition portion can separate the main body into an upper limiting cavity and a lower limiting cavity that are sequentially arranged in the first direction. When the second sampling member is matched with the upper limiting cavity, the upper surface of the second sampling member contacts the contact on the first inner wall surface of the upper limiting cavity. When the second sampling member is matched with the lower limiting cavity, the lower surface of the second sampling member contacts the contact on the first inner wall surface of the lower limiting cavity. Physically separating the two fuse structures is beneficial to reducing mutual interference between different fuse structures and improving the stability and reliability of the operation of the fuse structure.

[0040] In some embodiments, the second sampling piece includes two fuse structures, which are respectively arranged on both sides of the second sampling piece in the first direction. When the second sampling piece is inserted into the limiting cavity, one of the fuse structures is electrically connected to the contact in the limiting cavity.

[0041] In the embodiment of the present application, two fuse structures are arranged on both sides of the second sampling part in the first direction, so that the two fuse structures are integrally formed on the second sampling part. When the fuse structure is replaced, it is only necessary to replace the limiting cavity into which the second sampling part is inserted. This replacement method is simple and fast, and while improving the maintenance efficiency of the fuse structure, it is beneficial to reduce the maintenance cost of the battery device.

[0042] In some embodiments, the second sampling member includes a substrate and an insulating film, the insulating film is coated on opposite sides of the substrate in the first direction, the two fuse structures are respectively arranged between the insulating film and the substrate, and the second sampling member is provided with a through conductive hole, which is used to conduct the two oppositely arranged fuse structures.

[0043] By adopting the above technical solution, fuse structures are respectively provided on both sides of the second sampling piece. After the fuse structure on one side of the second sampling piece is blown, the fuse structure on the other side of the second sampling piece can be used for fuse protection. In this way, the second sampling piece can be reused, further reducing the maintenance cost of the low-voltage collection component.

[0044] In some embodiments, the fuse structure is configured as a resistor fuse. In the embodiments of the present application, by configuring the fuse structure as a resistor fuse, it helps protect the battery device and reduce risks such as thermal runaway.

[0045] In some embodiments, the first base and the third sampling member are connected by welding or gluing. The first base and the third sampling member are permanently fixed in the embodiment of the present application, which is conducive to improving the reliability of the connection between the first base and the third sampling member.

[0046] In some embodiments, the low-pressure sampling assembly further includes a second base, and the second base is used to detachably fix the second sampling member and the first sampling member.

[0047] The embodiment of the present application provides a second base, and utilizes the second base to achieve a detachable connection between the first sampling component and the second sampling component, thereby reducing the difficulty of disassembling and assembling the second sampling component relative to the first sampling component, thereby helping to reduce the maintenance difficulty and cost of the low-pressure collection assembly.

[0048] In some embodiments, the second base includes a first connecting member and a second connecting member, the first connecting member is detachably connected to the second connecting member, one of the first sampling member and the second sampling member is fixed to the first connecting member, and the other of the first sampling member and the second sampling member is limited and fixed between the first connecting member and the second connecting member.

[0049] In the embodiment of the present application, the first connecting member and the second connecting member are detachably provided. Disassembly means that the first connecting member and the second connecting member can be in a connected or disconnected state. When the first connecting member and the second connecting member are connected, one of the first sampling member and the second sampling member is fixed to the first connecting member, and the second sampling member is limited between the first connecting member and the second connecting member. This disassembly and assembly method is stable and reliable, and is conducive to improving disassembly and assembly efficiency.

[0050] In some embodiments, the first connecting member is fixed to the second sampling member, the first sampling member includes a collecting portion and an extending portion, the collecting portion is used to be welded to the battery cell, the extending portion is connected to the collecting portion, and the extending portion is clamped and fixed between the first connecting member and the second connecting member.

[0051] In the embodiment of the present application, the collecting portion and the extension portion can be integrally formed. The collecting portion can be configured as a square structure, which helps ensure the flow area of ​​the first sampling member welded to the battery cell and improves the stability of the weld. The extension portion is configured as a narrow strip structure to facilitate the positioning and fixing of the second base and the extension portion, reducing the difficulty of assembling the second base and the first sampling member.

[0052] In some embodiments, the first connecting member includes a first clamping portion, the second connecting member includes a second clamping portion and a third clamping portion, the second clamping portion and the third clamping portion are spaced apart in a second direction, the second direction is perpendicular to the first direction, and the second clamping portion and the third clamping portion abut against both ends of the extension portion in the second direction.

[0053] The embodiment of the present application facilitates rapid disassembly and assembly of the first sampling member and the second base by clamping the extension portion to the second clamping portion and the third clamping portion bracket provided on the second connecting member, thereby improving the assembly and maintenance efficiency of the low-pressure collection component.

[0054] In some embodiments, the first clamping portion and the second clamping portion are fixed in position in the first direction, and the third clamping portion and the extending portion are fixed in position in the first direction.

[0055] The embodiment of the present application realizes limitation in the first direction by the first clamping portion and the second clamping portion, and limitation in the first direction by the third clamping portion and the extension portion, which can not only satisfy the stable relationship between the relative positions of the first sampling piece and the second base, but also satisfy the stable relationship between the relative positions of the second base and the second sampling piece. The structure is simple and the disassembly and assembly are convenient.

[0056] In some embodiments, the first connecting member further includes a fourth clamping portion, and the second connecting member further includes a fifth clamping portion, and the fourth clamping portion and the fifth clamping portion are fixed in a limited position in the first direction.

[0057] The embodiment of the present application helps to improve the stability of the connection between the first connecting member and the second connecting member in the first direction by limiting the position of the fourth clamping portion and the fifth clamping portion in the first direction.

[0058] In some embodiments, the fourth clamping portion and the first clamping portion are spaced apart in the second direction, and the first connecting member is further provided with a penetrating avoidance hole, the avoidance hole is located between the first clamping portion and the fourth clamping portion in the second direction, and the fourth sampling member is passed through the avoidance hole.

[0059] In the embodiment of the present application, the avoidance hole is arranged between the first clamping portion and the fourth clamping portion, so that the fourth sampling piece can be accommodated in the gap between the first clamping portion and the fourth clamping portion. The avoidance hole can avoid the fourth sampling piece, and the first clamping portion and the fourth clamping portion can also protect the fourth sampling piece.

[0060] In some embodiments, when the battery cell is provided in plurality, the second direction is the direction in which the plurality of battery cells are arranged.

[0061] In some embodiments, the third sampling member is arranged to extend along the second direction. In the embodiment of the present application, by arranging the third sampling member 33 along the second direction, it is beneficial to reduce the third sampling member's collection of the operating parameters of each arranged battery cell and improve the stability of data collection.

[0062] In some embodiments, the battery cells include poles, and the first sampling member is welded to the poles. The first sampling member is used to electrically connect adjacent battery cells. In this embodiment of the present application, by welding the first sampling member to the poles, the first sampling member can both securely connect adjacent battery cells and enable voltage sampling of the battery cells.

[0063] The present application also provides an electrical device, including:

[0064] The battery device according to any one of the above items is used to provide electrical energy.

[0065] An embodiment of the present application provides an electrical device, which includes a battery device, which includes a housing, a battery cell, and a low-voltage collection assembly. The battery cell is disposed in the housing, and the low-voltage collection assembly is disposed in the housing. The low-voltage collection assembly is used to collect operating state parameters of the battery cell, including voltage and temperature. The low-voltage collection assembly includes a first sampling member, a second sampling member, and a third sampling member. The first sampling member is connected to the battery cell to collect the voltage of the battery cell. One end of the second sampling member is detachably connected to the first sampling member to transmit voltage. The third sampling member is detachably connected to the other end of the second sampling member to transmit voltage. The fourth sampling member is connected to the second sampling member to collect the temperature of the battery cell. In the embodiment of the present application, a second sampling component that is detachably connected is provided between the first sampling component and the second sampling component. In the event of sampling failure or other situations requiring maintenance of the low-voltage sampling component, the second sampling component can be separated from the first sampling component and the third sampling component, making it easy to directly replace the second sampling component or the third sampling component without having to replace the first sampling component, thereby reducing the maintenance difficulty and cost of the battery device and improving the maintenance efficiency of the low-voltage sampling component. The fourth sampling component is connected to the second sampling component. In the event that the fourth sampling component is blown, the second sampling component can be directly disassembled to replace the fourth sampling component and the second sampling component without having to replace the entire battery device or the entire low-voltage sampling component, thereby reducing the maintenance cost of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0067] Figure 1 It is a structural diagram of the electrical equipment disclosed in the embodiment of this application;

[0068] Figure 2 is a schematic structural diagram of a battery device disclosed in an embodiment of the present application;

[0069] Figure 3 This is a schematic diagram of the assembly of a battery cell and a low voltage collection component disclosed in an embodiment of the present application;

[0070] Figure 4 It is a structural diagram of the low voltage acquisition component disclosed in the embodiment of the present application;

[0071] Figure 5 is a front view of the second sampling member disclosed in the embodiment of the present application;

[0072] Figure 6is a schematic diagram of the back side of the second sampling member disclosed in the embodiment of the present application;

[0073] Figure 7 yes Figure 4 Enlarged view of part A in the middle.

[0074] In the drawings, the drawings are not drawn to scale.

[0075] Marking Description:

[0076] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, battery cell; 101, housing; 102, insulation layer; 103, window area; 104, pole; 214, upper cover; 211, carrier; 2, housing; 3, low-voltage collection assembly; 31, first sampling component; 311, collection portion; 312, extension portion; 32, second sampling component; 3201, first surface; 3202, second surface; 321, fuse structure; 32 3. Conducting hole; 324. Welding structure; 33. Third sampling part; 34. Fourth sampling part; 35. First base; 351. Limiting cavity; 352. Main body; 353. Partition; 36. Second base; 361. First connecting part; 3611. First clamping part; 3612. Fourth clamping part; 3613. Avoidance hole; 3623. Fifth clamping part; 362. Second connecting part; 3621. Second clamping part; 3622. Third clamping part; 4. Heat conducting part. DETAILED DESCRIPTION

[0077] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0079] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0080] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0081] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0082] In the description of the embodiments of the present application, the technical terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", "second direction", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0083] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0084] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0085] With the development of clean energy, more and more devices are using electricity as a driving force. Consequently, power batteries, such as lithium-ion batteries, that can store large amounts of electricity and undergo multiple charge and discharge cycles are rapidly developing. These batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields.

[0086] With the country's vigorous promotion of new energy vehicles, new energy vehicles have ushered in a golden opportunity for development. Vehicle safety and stability have always been of primary concern. Therefore, improving the safety of new energy vehicles will be one of the key factors determining their rapid adoption. Improving battery safety is a key approach to improving the safety of new energy vehicles.

[0087] The battery apparatus referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells, and may also include one or more battery cell assemblies, for providing higher voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0088] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module. When there are multiple battery cells, the battery module is formed by arranging and fixing the multiple battery cells to form an independent module. For example, a battery module may be formed by bundling multiple battery cells with cable ties.

[0089] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0090] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0091] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0092] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to accommodate battery cells or battery module cell assemblies. Enclosed herein means covered or closed, and may be sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0093] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cells or battery module cell assemblies.

[0094] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0095] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0096] A battery cell may include an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet comprises a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive active material layer protrudes from the positive electrode collector coated with the positive active material layer, and the positive electrode collector not coated with the positive active material layer serves as the positive electrode tab. For lithium-ion batteries, for example, the positive electrode current collector may be made of aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet comprises a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative active material layer protrudes from the negative electrode collector coated with the negative active material layer, and the negative electrode collector not coated with the negative active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon. To ensure high current flow without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene).

[0097] Illustratively, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0098] For example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0099] Illustratively, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0100] For example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium.

[0101] Illustratively, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0102] Illustratively, the negative electrode active material may be a negative electrode active material for a battery that is well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate. The silicon-based material may be selected from at least one of elemental silicon, silicon oxides, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxides, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0103] Illustratively, the housing includes a top cover and an outer shell. The outer shell has an opening, and the top cover closes the opening to form a sealed space for accommodating materials such as the electrode assembly and electrolyte. The outer shell may have one or more openings. The top cover may also have one or more openings.

[0104] Illustratively, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal can be provided on the top cover or the housing.

[0105] For example, a pressure relief member is provided on the housing. The pressure relief member is used to release the internal pressure of the battery cell. It should be noted that the pressure relief member can be an explosion-proof valve or a pressure relief hole.

[0106] The development of battery technology must take into account multiple design factors at the same time, such as energy density, discharge capacity, charge and discharge rate and other performance parameters. In addition, the safety and reliability of the battery must also be considered.

[0107] Currently, battery devices use a low-voltage acquisition component to monitor the battery's operating status. This component collects sampling signals from the battery cells. However, if an open circuit, short circuit, or defective battery cells are detected, the low-voltage acquisition component may be unable to collect the sampling signals from the battery cells. However, existing low-voltage acquisition components are fixed in an integrated manner. If a failure occurs, the battery device must be completely disassembled, making repair difficult and costly.

[0108] In order to solve the problem of difficulty and high cost in maintaining the sampling structure, an embodiment of the present application proposes a sampling component, including a conductive connector, a main circuit board, and a sampling circuit board connected between the conductive component and the main circuit board. The conductive connector is used to connect the component to be sampled, and the sampling circuit board is used to collect sampling signals and transmit the sampling signals to the main circuit board. The sampling circuit board is detachably connected to the conductive connector. The sampling circuit board is electrically connected to the component to be sampled through the conductive connector. The sampling circuit board can collect sampling signals from the component to be sampled and transmit the sampling signals to the main circuit board to achieve sampling of data information such as voltage of the component to be sampled. When sampling failure occurs, since the sampling circuit board is detachably connected to the conductive connector, the sampling circuit board can be directly separated from the conductive connector to replace the sampling circuit board and the main circuit board. The above-mentioned sampling component can replace the sampling circuit board and the main circuit board when sampling fails, without replacing the conductive connector, saving maintenance costs, reducing maintenance difficulty, and improving the maintenance efficiency of the sampling component.

[0109] The technical solutions described in the embodiments of this application are applicable to data collection from a sampled component. The sampled component may be a battery cell or a battery. The collected data may be electrical data, such as voltage and temperature.

[0110] The sample to be sampled is placed in an electrical device, which may be a vehicle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, electric tool, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0111] It should be noted that the technical solutions described in the embodiments of the present application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including boxes and electrical equipment using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0112] Please refer to Figure 1 , a controller 200, a motor 300 and a battery device 100 may be provided inside the vehicle 1000, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0113] To meet different power requirements, the battery device 100 may include multiple battery cells 10. A battery cell 10 is the smallest unit that makes up a battery module or battery device 100. Multiple battery cells 10 may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel configurations. Multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of multiple battery cells 10 is housed within a housing. Alternatively, the battery device 100 may be constructed by first connecting multiple battery cells in series, in parallel, or in a hybrid configuration to form a battery module, which is then connected in series, in parallel, or in a hybrid configuration to form a single unit housed within a housing. The battery device 100 may also include other structures. For example, the battery device 100 may include a busbar to electrically connect the multiple battery cells. Each battery cell may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or have other shapes.

[0114] The enclosure can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The enclosure can be made of alloy materials such as aluminum alloy and iron alloy, polymer materials such as polycarbonate and polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0115] The box is used to accommodate the battery assembly, and the box can be of various structures. In some embodiments, see Figure 2 The case may include an upper cover 214 and a carrier 211. The upper cover 214 and the carrier 211 cover each other and together define a chamber for accommodating the battery cell 10. The carrier 211 may be a hollow structure with one end open, and the upper cover 214 is a plate-like structure. The upper cover 214 covers the open side of the carrier 211 to form a case with a chamber. The upper cover 214 and the carrier 211 may also both be hollow structures with one end open, with the open side of the upper cover 214 covering the open side of the carrier 211 to form a case with a chamber. Of course, the upper cover 214 and the carrier 211 may take a variety of shapes, such as a cylinder, a cuboid, etc.

[0116] In order to improve the sealing performance after the upper cover 214 and the carrier 211 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the upper cover 214 and the carrier 211 .

[0117] Assuming that the upper cover 214 covers the top of the carrier 211, the upper cover 214 can also be called the upper box cover, and the carrier 211 can also be called the lower box cover. An embodiment of the present application provides a battery device, which includes a box body 2, a battery cell 10, and a low-voltage collection assembly 3. The box body 2 is provided with a receiving cavity, and the battery cell 10 is disposed in the receiving cavity. It should be noted that the battery cell 10 represents the sample to be collected by the low-voltage collection assembly 3 in the battery device. In the embodiment of the present application, the above-mentioned sample to be sampled is the battery cell 10. In other embodiments, the sample to be sampled can be the battery device 100.

[0118] The low voltage collection component 3 is disposed in the box 2 and is used to collect the working state parameters of the battery cell 10 , including voltage and temperature;

[0119] The low-pressure collection assembly 3 includes a first sampling component 31 , a second sampling component 32 , a third sampling component 33 and a fourth sampling component 34 .

[0120] The first sampling member 31 is connected to the battery cell 10 to collect the voltage of the battery cell 10. The first sampling member 31 can be a bar or a busbar. By connecting to the electrical connection portion of the battery cell 10, the first sampling member 31 can be used to connect the battery cells 10 in series or in parallel, or to transmit electrical energy between the battery cells 10. When sampling the battery cells 10, sampling can be performed on a per-cell basis or on a battery module consisting of multiple battery cells 10. When sampling on a per-cell basis, the first sampling member 31 is connected to each battery cell 10.

[0121] One end of the second sampling element 32 is detachably connected to the first sampling element 31 and is used to transmit voltage. One end of the second sampling element 32 is connected to the first sampling element 31, and the other end is connected to the third sampling element 33. The second sampling element 32 is electrically connected to the first sampling element 31 to collect sampling signals. The second sampling element 32 can also transmit the collected signals to the third sampling element 33. The sampling signals can include data such as the voltage of the battery cell 10. By collecting the sampling signals, the second sampling element 32 can monitor the status of the battery cell.

[0122] The third sampling member 33 is detachably connected to the other end of the second sampling member 32 to transmit the voltage. The third sampling member 33 is electrically connected to the second sampling member 32 and is used to transmit the sampling signal. The second sampling member 32 and / or the third sampling member 33 can be a flexible printed circuit (FPC). In other embodiments, the second sampling member 32 and / or the third sampling member 33 can also be a rigid circuit board, a rigid-flex board, or other circuit boards. The number of second sampling members 32 can be one or more. When the number of second sampling members 32 is multiple, the multiple second sampling members 32 are all connected to the third sampling member 33, and the multiple second sampling members 32 are respectively connected to different sampling points. The second sampling member 32 can be detachably connected to the first sampling member 31 in various ways, for example, the second sampling member 32 and the first sampling member 31 can be snap-connected, plug-in, or connected by screws.

[0123] The second sampling piece 32 and the third sampling piece 33 can also be detachably connected. When maintaining the low-pressure collection component 3, the second sampling piece 32 can be directly replaced. The second sampling piece 32 and the third sampling piece 33 can also be fixedly connected. When maintaining the low-pressure collection component 3, the second sampling piece 32 and the third sampling piece 33 can be replaced. The above maintenance solutions do not require disassembly of the first sampling piece 31, reducing maintenance difficulty and maintenance costs.

[0124] Optionally, the third sampling piece 33 is arranged on one end surface of each battery cell 10, usually at one end of the electrode terminal in the height direction of the battery cell 10, covering the surfaces of multiple battery cells 10, so as to facilitate the connection between the third sampling piece 33 and each battery cell 10 to be sampled; the second sampling piece 32 is connected to the third sampling piece 33, and the second sampling piece 32 can be arranged perpendicular to the third sampling piece 33, so that the second sampling piece 32 can be conveniently connected to the battery cell without bending the third sampling piece 33 toward each battery cell, and the process is simple.

[0125] The fourth sampling element 34 is connected to the second sampling element 32 and is used to collect the temperature of the battery cell 10. The fourth sampling element 34 in the embodiment of the present application represents a negative temperature coefficient (NTC) sampling element, also known as a thermistor. The resistance of the fourth sampling element 34 decreases as the temperature increases. Therefore, the fourth sampling element 34 in the embodiment of the present application can be used to implement temperature control and protection functions, such as monitoring the temperature of the battery cell.

[0126] It should be noted that the fourth sampling member 34 is connected to the second sampling member 32, which means that the connection between the fourth sampling member 34 and the second sampling member 32 can be a fixed connection such as welding or bonding, or a detachable connection such as a snap connection. The connection methods of the fourth sampling member 34 and the second sampling member 32 include but are not limited to the above-mentioned methods, and the connection method between the fourth sampling member 34 and the second sampling member 32 does not limit the function of the fourth sampling member 34.

[0127] In some embodiments, the low-voltage acquisition component 3 also includes components such as plastic structural parts to realize series and parallel connection of battery cells 10, as well as temperature sampling and voltage sampling functions. The third sampling component 33 transmits the sampling signal to the battery's BMS system.

[0128] The battery device provided in an embodiment of the present application includes a box, a battery cell and a low-voltage collection component. The battery cell is arranged in the box, and the low-voltage collection component is arranged in the box. The low-voltage collection component is used to collect the working status parameters of the battery cell, and the working status parameters include voltage and temperature. The low-voltage collection component includes a first sampling component, a second sampling component and a third sampling component. The first sampling component is connected to the battery cell to collect the voltage of the battery cell, one end of the second sampling component is detachably connected to the first sampling component to transmit voltage, the third sampling component is detachably connected to the other end of the second sampling component to transmit voltage, and the fourth sampling component is connected to the second sampling component to collect the temperature of the battery cell. In the embodiment of the present application, a second sampling component that is detachably connected is provided between the first sampling component and the second sampling component. In the event of sampling failure or other situations requiring maintenance of the low-voltage sampling component, the second sampling component can be separated from the first sampling component and the third sampling component, making it easy to directly replace the second sampling component or the third sampling component without having to replace the first sampling component, thereby reducing the maintenance difficulty and cost of the battery device and improving the maintenance efficiency of the low-voltage sampling component. The fourth sampling component is connected to the second sampling component. In the event that the fourth sampling component is blown, the second sampling component can be directly disassembled to replace the fourth sampling component and the second sampling component without having to replace the entire battery device or the entire low-voltage sampling component, thereby reducing the maintenance cost of the battery device.

[0129] In some embodiments, as Figure 3As shown, the fourth sampling member 34 is disposed opposite to the battery cell 10 in a first direction, wherein the first direction is a height direction of the battery cell 10 .

[0130] It should be noted that the relative arrangement means that the fourth sampling member 34 at least partially overlaps with the orthographic projection of the battery cell 10 in the first direction. Preferably, the orthographic projection of the fourth sampling member 34 in the first direction is completely within the orthographic projection of the battery cell 10 in the first direction.

[0131] In the embodiment of the present application, the fourth sampling member is arranged to be opposite to the battery cell in the first direction, which is conducive to improving the accuracy of temperature collection by the fourth sampling member, thereby improving the working efficiency of the battery device.

[0132] In some embodiments, the battery cell 10 includes a shell 101 and an insulating layer 102 . The insulating layer 102 is wrapped around the outside of the shell 101 , and the insulating layer 102 is at least partially windowed to expose the shell 101 , forming a window area 103 . The fourth sampling member 34 is arranged opposite to the window area 103 .

[0133] It should be noted that the insulating layer is used to cover the outside of the shell to achieve an insulating effect. The insulating layer can be a blue film, and the insulating layer can be a composite film made of multiple layers of materials. The materials of the insulating layer include but are not limited to polypropylene (PP), polyethylene (PE), high molecular weight polyethylene (HMPE), polyester (PET), and polyimide (PI). In some embodiments, the insulating layer can also be added with a flame retardant or a moisture-proof layer.

[0134] It should be noted that the window means that the insulating layer 102 is covered on the outside of the shell 101, but in the window area 103, the insulating layer 102 is hollowed out, and the shell 101 does not have an insulating layer 102 on the outside of the window area 103.

[0135] The fourth sampling member 34 and the window area 103 are arranged relative to each other, which means that the fourth sampling member 34 and the window area 103 are arranged relative to each other in the first direction (the height direction of the battery cell). It can also be understood that the projection of the fourth sampling member 34 in the first direction overlaps with the projection of the window area 103 in the first direction, and the window area 103 is located at one end of the battery cell in the height direction. For example, the window area 103 is arranged at the top or bottom of the shell 101.

[0136] The embodiment of the present application provides a window area of ​​the insulating layer on the shell of the battery cell, which can not only meet the insulation requirements of other positions on the shell, but also the fourth sampling member is arranged relative to the window area, reducing the risk of heat being isolated by the insulating layer, which is conducive to improving the accuracy of the fourth sampling member in sampling the battery cell temperature.

[0137] In some embodiments, as Figure 3As shown, the fourth sampling member 34 is disposed on a side of the second sampling member 32 in the first direction away from the battery cell 10. The second sampling member 32 has two opposite sides in the first direction, one side of which is in contact with the battery cell and the other side is away from the battery cell.

[0138] The embodiment of the present application arranges the fourth sampling member on a side of the second sampling member away from the battery cell in the first direction. While ensuring that the fourth sampling member can perform the temperature sampling function of the battery cell, the interference of the installation of the fourth sampling member on the battery cell can be reduced, which is beneficial to improving the space utilization of the assembly and further improving the energy density of the battery device.

[0139] In some embodiments, as Figure 3 As shown, the battery device further includes a heat conducting member 4. In the first direction, the heat conducting member 4 is disposed between the second sampling member 32 and the battery cell 10.

[0140] In the embodiment of the present application, the heat conducting member is arranged between the second sampling member and the battery cell. The heat conducting member 4 can transfer the heat of the battery cell 10 to the second sampling member 32, so that the second sampling member 32 can accurately collect the temperature of the battery cell, thereby improving the efficiency of the battery device.

[0141] In some embodiments, as Figure 4-Figure 6 As shown, the second sampling component 32 is provided with a fuse structure 321, and the fuse structure 321 is used to perform fuse protection on the low-voltage sampling component.

[0142] In the embodiment of the present application, the fuse structure is arranged on the second sampling part 32, and the layout of the fuse structure is more flexible. Moreover, when a certain fuse structure is blown, the second sampling part 32 can be removed and replaced alone without replacing the first sampling part and the third sampling part, thereby reducing the need to replace the first sampling part and the third sampling part at the same time, and further reducing the battery maintenance cost.

[0143] In some embodiments, as Figure 4-Figure 6 As shown, the second sampling component 32 is provided with at least two fuse structures 321 , and the at least two fuse structures 321 are used to perform fuse protection on the low-voltage sampling components respectively.

[0144] It should be noted that in the embodiment of the present application, the number of fuse structures 321 provided on the second sample component 32 is multiple. The number of fuse structures 321 provided on the same second sample component 32 can be two, three, four, etc. At the same time, there is only one fuse structure 321 used to fuse and protect the first and third sample components. In other words, the other fuse structures 321 are disconnected from the first and third sample components. After the current fuse structure 321 is blown, the position or connection state of the second sample component 32 can be changed so that the other fuse structures 321 protect the first and third sample components, so that only one fuse structure is fuse-protecting the first and third sample components at the same time.

[0145] In the embodiment of the present application, multiple fuse structures are provided on the second sampling component. After one fuse structure on the second sampling component blows, there is no need to replace the second sampling component. Only the connection position or connection state of the second sampling component needs to be adjusted. This can enable the other fuse structures on the second sampling component to continue to blow and protect the first sampling component and the third sampling component, thereby reducing the maintenance cost of the second sampling component and improving the maintenance efficiency of the battery device.

[0146] In some embodiments, as Figure 4-6 As shown, among the at least two fuse structures 321 , one fuse structure 321 is connected to the first sampling component 31 and the third sampling component 33 , and the other fuse structure 321 is disconnected from the first sampling component 31 and the third sampling component 33 .

[0147] In the embodiment of the present application, multiple fuse structures are arranged on the same second sampling component. After one of the fuse structures blows, there is no need to disassemble and replace the second sampling component. It is only necessary to change the connection state of different fuse structures in the second sampling component and the first sampling component and the third sampling component to achieve new fuse protection, thereby reducing the maintenance cost of the low-voltage protection component and improving the maintenance efficiency of the battery device.

[0148] In some embodiments, as Figure 3 and Figure 4 As shown, the low-pressure collection component 3 also includes a first base 35, and the first base 35 is fixed to the third sampling piece 33. It should be noted that the embodiment of the present application does not limit the fixing form of the first base 35 and the third sampling piece 33. For example, the fixing of the first base 35 and the third sampling piece 33 includes but is not limited to permanent fixing methods such as bonding and welding, and also includes detachable fixing methods such as snap-on.

[0149] like Figure 3As shown, the second sampling member 32 is detachably connected to the first base 35, enabling the at least two fuse structures to separately provide fuse protection for the low-voltage collection assembly. Removable means that the second sampling member 32 and the second base 36 can remain connected or disconnected. In other words, the connection between the second sampling member 32 and the second base 36 is non-permanent. This allows for greater flexibility in the connection between the second sampling member 32 and the second base 36. If the second sampling member 32 requires repair or maintenance, the second connector 362 can be removed from the second base 36 for direct access, improving the maintainability of the second connector 362. Furthermore, if the fuse structure on the second sampling member 32 blows, the second sampling member 32 can be removed from the second base 36 to adjust the connection between the second sampling member 32 and the second base 36, enabling different fuse structures to be connected to the first and third sampling members.

[0150] It should be noted that, in addition to being physically connected, the first base and the third sampling member in the embodiment of the present application are also electrically connected.

[0151] The embodiment of the present application makes the second sampling part and the first base detachable, which is beneficial to improving the efficiency of replacing the fuse structure in the second sampling part after it is blown. The connection state of the second sampling part and the first base can be quickly adjusted by disassembly and assembly, thereby improving the efficiency of maintenance of the second sampling part.

[0152] In some embodiments, as Figure 4 As shown, the first base 35 is provided with a plurality of limiting cavities 351 , the number of the limiting cavities 351 is the same as the number of the fuse structures 321 , and the second sampling member 32 is inserted into one of the plurality of limiting cavities 351 to realize the connection between one fuse structure 321 and the first sampling member 31 and the third sampling member 33 .

[0153] For example, when three fuse structures 321 are provided on the second sampling component 32, three limiting cavities 351 can be provided on the first base 35, and the second sampling component 32 is inserted into one limiting cavity 351, so that one fuse structure 321 in the second sampling component 32 can realize the fuse protection of the first sampling component and the third sampling component. That is to say, under normal conditions, one fuse structure 321 in the second sampling component 32 connects the first sampling component and the third sampling component, and the fuse structure can detect the circuit status of the first sampling component and the third sampling component. When the circuit is overcurrent, the fuse structure will fuse, thereby realizing the protection of the first sampling component and the third sampling component. In the above process, the other two fuse structures remain in a non-connected state with the first sampling component and the third sampling component.

[0154] After the current fuse structure blows, if the second sample needs to be maintained, it can be moved from the current limiting cavity 351 to another limiting cavity. This will connect the other unblown fuse structures to the circuit where the first and third sample components are located, and the new fuse structure will provide fuse protection for the circuit. This second sample has three opportunities to provide fuse protection, eliminating the need for frequent replacement of new second sample components.

[0155] It should be noted that the number of fuse structures in the second sampling piece described in the embodiment of the present application is multiple, and the number of limiting cavities in the first base is equal to the number of fuse structures. The number of fuse structures can be two, three, four, five, etc. The above embodiment only describes some of the specific implementation methods, but the working principles of other embodiments are similar to the above embodiments, and they are all within the scope of protection of this application.

[0156] In the embodiment of the present application, a plurality of limiting cavities corresponding to the number of fuse structures are provided on the first base, so that each limiting cavity can correspond to a fuse structure. When the second sampling piece is inserted into a limiting cavity, the conduction between the fuse structure and the circuit in the second sampling piece can be achieved. The setting of the limiting cavity is conducive to improving the stability of the installation of the second sampling piece, and is also conducive to improving the connection stability of the circuit where the fuse structure is located.

[0157] In some embodiments, as Figure 3 and Figure 4 As shown, the first base 35 is configured as an insulator, each limiting cavity 351 is provided with a contact, the second sampling member 32 is inserted into the limiting cavity 351, and the contact electrically connects a fuse structure 321 and the third sampling member 33. The insulator indicates that the first base 35 is supported by a non-conductive material.

[0158] In the embodiment of the present application, the first base is set as an insulator, and the fuse structure and the third sampling member are electrically connected through contacts in the limiting cavity, which helps to reduce the risk of battery cell creepage.

[0159] In some embodiments, the plurality of limiting cavities 351 in the first base 35 are sequentially arranged in the first direction. In other words, the plurality of limiting cavities 351 are sequentially arranged in the height direction of the battery cell. When replacing the connection between the fuse structure and the third sampling member, only the height position of one end of the second sampling member needs to be changed to achieve the connection relationship between the second sampling member and the different limiting cavities 351. This not only enables the replacement of the fuse structure, but also provides greater flexibility in the first direction for the second sampling member.

[0160] The embodiment of the present application arranges multiple limiting cavities in the first base in sequence in the height direction, which is conducive to matching the direction of convenient movement of the second sampling piece, thereby improving the convenience of disassembly and assembly of the second sampling piece, and further improving the reliability of the connection between the second sampling piece and the first base.

[0161] In some embodiments, as Figure 4 As shown, the first base 35 includes a main body 352 and a separator 353. The main body 352 is hollow, and the separator 353 is arranged in the main body to divide the main body into two limiting cavities. The contacts are arranged on the inner wall surface of each main body near the limiting cavity. It should be noted that the embodiment of the present application does not limit the method of separating the main body 352 by the separator 353, as long as the separator 353 can separate the main body 352 into two independent limiting cavities 351. For example, the separator 353 can separate the interior of the main body 352 into two limiting cavities 351 arranged in sequence in the width direction of the battery cell. The separator 353 can also separate the main body 352 into two limiting cavities 351 arranged in sequence in the height direction of the battery cell. Alternatively, in other embodiments, the separator 353 can also separate the main body 352 into two limiting cavities 351 arranged in sequence in the length direction of the battery cell. It should be noted that the separation method of the separator 353 in the embodiment of the present application includes but is not limited to the above-mentioned embodiments.

[0162] In the embodiment of the present application, the first base is configured as a main body portion and a partition portion, and the partition portion divides the interior of the main body portion into two limiting cavities. Whenever the second sampling member is connected to one of the limiting cavities, electrical contact is achieved between a fuse structure and a contact in the limiting cavity. This connection method is stable and highly reliable, and is convenient to assemble and disassemble.

[0163] In some embodiments, as Figure 7 As shown, the contact is provided on the first inner wall surface of the main body portion 352 , and the first inner wall surface is arranged opposite to the partition portion 353 in the first direction.

[0164] It should be noted that, in the embodiment of the present application, a plurality of inner wall surfaces are provided in the limiting cavity 351, wherein the first inner wall surface is a wall surface in the limiting cavity 351 that is arranged opposite to the partition portion 353 in the first direction, and each limiting cavity 351 is provided with a first inner wall surface.

[0165] In the embodiment of the present application, by setting the contact on the first inner wall surface of the main body, when the second sampling member is inserted into different limiting cavities, the two surfaces of the second sampling member that are opposite in the first direction can respectively contact different inner wall surfaces. Specifically, the partition 353 can separate the main body 352 into an upper limiting cavity 351 and a lower limiting cavity 351 that are sequentially arranged in the first direction. When the second sampling member is matched with the upper limiting cavity, the upper surface of the second sampling member contacts the contact on the first inner wall surface of the upper limiting cavity. When the second sampling member is matched with the lower limiting cavity, the lower surface of the second sampling member contacts the contact on the first inner wall surface of the lower limiting cavity. Physically separating the two fuse structures is beneficial to reducing mutual interference between different fuse structures and improving the stability and reliability of the fuse structure.

[0166] In some embodiments, the second sampling piece includes two fuse structures, which are respectively arranged on both sides of the second sampling piece in the first direction. When the second sampling piece is inserted into the limiting cavity, one of the fuse structures is electrically connected to the contact in the limiting cavity.

[0167] The two fuse structures in the embodiment of the present application are respectively arranged on both sides of the second sample part in the first direction, which means that the two fuse structures are separated on both sides of the second sample part, and the two fuse structures are isolated from each other. An insulating layer can be set between the two fuse structures so that the two fuse structures are not conductive to each other and do not interfere with each other. The two fuse structures can be integrally formed by film pressing, and then areas that can contact with contacts are respectively set on the surfaces of the two layers of film pressing to achieve electrical contact between the fuse structures and the contacts.

[0168] In the embodiment of the present application, two fuse structures are arranged on both sides of the second sampling part in the first direction, so that the two fuse structures are integrally formed on the second sampling part. When the fuse structure is replaced, it is only necessary to replace the limiting cavity into which the second sampling part is inserted. This replacement method is simple and fast, and while improving the maintenance efficiency of the fuse structure, it is beneficial to reduce the maintenance cost of the battery device.

[0169] In some embodiments, the second sampling component 32 includes a substrate and an insulating film, the insulating film is coated on opposite sides of the substrate in the first direction, the two fuse structures are respectively arranged between the insulating film and the substrate, and the second sampling component 32 is provided with a through conductive hole 323, the conductive hole connecting the two opposite fuse structures.

[0170] Reference Figure 4 、 Figure 5 and Figure 6As shown, the second sampling member 32 includes a first surface 3201 and a second surface 3202 disposed opposite each other, each of which is provided with a fuse structure 321. The fuse structure 321 on one surface is electrically connected to the third sampling member 33, and the second sampling member 32 can be detachably disposed relative to the first base 35 so that the fuse structure 321 on the other surface is electrically connected to the third sampling member 33.

[0171] The second sampling component 32 is a double-sided circuit board, with circuits on both the first side 3201 and the second side 3202, and fuse structures 321 on both the first side 3201 and the second side 3202. Figure 4-Figure 6 As shown, in the initial state, the fuse structure 321 on one side is electrically connected to the first sampling member 31 and the third sampling member 33. After the fuse structure 321 on one side is blown, the second sampling member 32 is pulled out of the current limiting cavity 351 and reassembled into another limiting cavity 351, so that the fuse structure 321 on the other side is electrically connected to the first sampling member 31 and the third sampling member 33, without replacing the second sampling member 32.

[0172] By adopting the above technical solution, fuse structures 321 are respectively provided on both sides of the second sampling piece 32. After the fuse structure 321 on one side of the second sampling piece 32 is melted, the fuse structure 321 on the other side of the second sampling piece 32 can be used for fuse protection. In this way, the second sampling piece 32 can be reused once, further reducing the maintenance cost of the low-voltage collection component.

[0173] In some embodiments, as Figure 5 and Figure 6 As shown, a conducting hole 323 is provided on the second sampling component 32 , and the fuse structure 321 on the second surface 3202 is electrically connected to the first sampling component through the conducting hole 323 .

[0174] The conductive hole 323 may be a through hole penetrating the second sampling member 32 or include a plurality of blind holes that are conductive to each other. The conductive hole 323 is used to conduct the circuits on the first surface 3201 and the second surface 3202 .

[0175] The welding structures 324 are all arranged on the first surface 3201, and the welding structures 324 are electrically connected to the fuse structure 321 on the first surface 3201; the welding structures 324 are electrically connected to the vias 323 and the fuse structure 321 on the second surface 3202. When the circuit on the second surface 3202 is electrically connected to the third sample component 33, the current can flow from the first sample component 31, the welding structures 324, the vias 323 to the fuse structure on the second surface 3202, and then to the third sample component 33.

[0176] By adopting the above technical solution, the first sampling member 31 only needs to be connected to one side of the second sampling member 32, which saves costs. The second sampling member 32 occupies less space in the battery device, which is conducive to improving the energy density of the battery device.

[0177] In some embodiments, the second sample component 32 and the third sample component 33 are both flexible circuit boards. Flexible circuit boards are made of polyimide or polyester film as a substrate and are a type of printed circuit board with good toughness, high wiring density, light weight, thin thickness, and good bendability.

[0178] In some embodiments, the fuse structure 321 is configured as a resistor fuse. The fuse structure in the embodiments of the present application can be made of a conductive material. The fuse structure is used to protect the battery cells. If the current flowing in the battery cell exceeds the rated current value of the resistor fuse, the fuse resistor will melt, thereby disconnecting the circuit and preventing damage to the battery cell due to overload.

[0179] The embodiment of the present application helps to protect the battery device and reduce risks such as thermal runaway by setting the fusing structure as a resistance fuse.

[0180] In some embodiments, as Figure 4 As shown, the first base 35 is connected to the third sampling member 33 by welding or gluing.

[0181] The permanent fixing method of the first base 35 and the third sampling member 33 in the embodiment of the present application is beneficial to improving the reliability of the connection between the first base 35 and the third sampling member.

[0182] In some embodiments, as Figure 3 and Figure 4 As shown, the low-pressure sampling assembly 3 further includes a second base 36 , and the second base 36 is used to detachably fix the second sampling member 32 and the first sampling member 31 .

[0183] The embodiment of the present application provides a second base, and utilizes the second base to achieve a detachable connection between the first sampling component and the second sampling component, thereby reducing the difficulty of disassembling and assembling the second sampling component relative to the first sampling component, thereby helping to reduce the maintenance difficulty and cost of the low-pressure collection assembly.

[0184] In some embodiments, as Figure 3 and Figure 4 As shown, the second base 36 includes a first connecting member 361 and a second connecting member 362, the first connecting member 361 and the second connecting member 362 are detachably connected, one of the first sampling member 31 and the second sampling member 32 is fixed to the first connecting member 361, and the other of the first sampling member 31 and the second sampling member 32 is limited and fixed between the first connecting member 361 and the second connecting member 362.

[0185] In the embodiment of the present application, the first connecting member and the second connecting member are detachably provided. Disassembly means that the first connecting member and the second connecting member can be in a connected or disconnected state. When the first connecting member and the second connecting member are connected, one of the first sampling member and the second sampling member is fixed to the first connecting member, and the second sampling member is limited between the first connecting member and the second connecting member. This disassembly and assembly method is stable and reliable, and is conducive to improving disassembly and assembly efficiency.

[0186] In some embodiments, as Figure 3 and Figure 4 As shown, the first connecting member 361 is fixed to the second sampling member 32. The first sampling member 31 includes a collecting portion 311 and an extending portion 312. The collecting portion 311 is used to be welded to the battery cell 10. The extending portion 312 is connected to the collecting portion 311, and the extending portion 312 is clamped and fixed between the first connecting member 361 and the second connecting member 362.

[0187] It should be noted that the first sampling member 31 may be a bar, such as a copper bar or an aluminum bar.

[0188] In the embodiment of the present application, the collecting portion 311 and the extension portion 312 can be integrally formed. The collecting portion 311 can be configured as a square structure, which helps ensure the flow area of ​​the first sampling member welded to the battery cell and improves the stability of the weld. The extension portion 312 is configured as a narrow strip structure, which facilitates the positioning and fixing of the second base and the extension portion 312, thus reducing the difficulty of assembling the second base and the first sampling member.

[0189] In some embodiments, the first connector 361 includes a first engaging portion 3611, and the second connector 362 includes a second engaging portion 3621 and a third engaging portion 3622. The second engaging portion 3621 and the third engaging portion 3622 are spaced apart in a second direction, the second direction being perpendicular to the first direction, and the second engaging portion 3621 and the third engaging portion 3622 abut against both ends of the extension portion 312 in the second direction. It will be appreciated that the second engaging portion 3621 and the third engaging portion 3622 are used to engage the extension portion 312 to secure the second connector 362 to the first sampling member 31. Specifically, the extension portion 312 is interference-engaged within the gap between the second engaging portion 3621 and the third engaging portion 3622.

[0190] The embodiment of the present application facilitates rapid disassembly and assembly of the first sampling member and the second base by clamping the extension portion to the second clamping portion and the third clamping portion bracket provided on the second connecting member, thereby improving the assembly and maintenance efficiency of the low-pressure collection component.

[0191] In some embodiments, as Figure 3 and Figure 4As shown, the first clamping portion 3611 and the second clamping portion 3621 are fixed in position in the first direction, and the third clamping portion 3622 and the extension portion 312 are fixed in position in the first direction. The fixed position in the first direction described in the embodiment of the present application can be understood as the first clamping portion and the second clamping portion at least partially abutting each other in the first direction, so that the first clamping portion and the second clamping portion maintain a limiting effect on their relative positions in the first direction. The fixed position in the first direction of the third clamping portion and the extension portion means that the third clamping portion and the extension portion abut each other in the first direction, so that the third clamping portion and the extension portion maintain a limiting effect on their relative positions in the first direction.

[0192] The embodiment of the present application realizes limitation in the first direction by the first clamping portion and the second clamping portion, and limitation in the first direction by the third clamping portion and the extension portion, which can not only satisfy the stable relationship between the relative positions of the first sampling piece and the second base, but also satisfy the stable relationship between the relative positions of the second base and the second sampling piece. The structure is simple and the disassembly and assembly are convenient.

[0193] In some embodiments, as Figure 3 and Figure 4 As shown, the first connecting member 361 further includes a fourth clamping portion 3612 , and the second connecting member 362 further includes a fifth clamping portion 3623 . The fourth clamping portion 3612 and the fifth clamping portion 3623 are fixed in a limited position in the first direction.

[0194] It should be noted that the fourth clamping portion 3612 and the fifth clamping portion 3623 being limited and fixed in the first direction means that the first clamping portion 3611 and the fifth clamping portion 3623 are abutted and limited in at least the first direction.

[0195] The embodiment of the present application helps to improve the stability of the connection between the first connecting member and the second connecting member in the first direction by limiting the position of the fourth clamping portion and the fifth clamping portion in the first direction.

[0196] In some embodiments, as Figure 4 As shown, the fourth clamping portion 3612 and the first clamping portion 3611 are spaced apart in the second direction, and the first connecting member 361 is further provided with a through avoidance hole 3613, the avoidance hole 3613 is located between the first clamping portion 3611 and the fourth clamping portion 3612 in the second direction, and the fourth sampling member 34 is passed through the avoidance hole 3613.

[0197] It should be noted that, “through” means that the avoidance hole 3613 is provided through the two opposite ends of the first connecting member 361 in the first direction, so as to reduce the interference of the first connecting member on the fourth sampling member.

[0198] In the embodiment of the present application, the avoidance hole is arranged between the first clamping portion and the fourth clamping portion, so that the fourth sampling piece can be accommodated in the gap between the first clamping portion and the fourth clamping portion. The avoidance hole can avoid the fourth sampling piece, and the first clamping portion and the fourth clamping portion can also protect the fourth sampling piece.

[0199] In some embodiments, combined Figure 2 and Figure 3 As shown, when multiple battery cells 10 are provided, the second direction is the direction in which the multiple battery cells 10 are arranged. The sides with larger areas among the multiple battery cells can be stacked and arranged in sequence. The direction in which the multiple battery cells are arranged is perpendicular to the extension direction of the sides with larger areas of the battery cells. Therefore, the second direction can also be understood as the thickness direction of the battery cells.

[0200] In some embodiments, combined Figure 2 and Figure 3 As shown, the third sampling member 33 is extended along the second direction. In other words, the third sampling member 33 is extended along the arrangement direction of the battery cells 10 .

[0201] In the embodiment of the present application, the third sampling member 33 is arranged along the second direction, which is beneficial to reducing the collection of the operating parameters of each arranged battery cell by the third sampling member and improving the stability of data collection.

[0202] In the embodiment of the present application, the third sampling piece 33 is arranged on one end surface of each battery cell 10, usually at one end of the pole 104 in the height direction of the battery cell 10, covering the surface of multiple battery cells 10, so as to facilitate the connection between the third sampling piece and each battery cell 10 to be sampled; the second sampling piece 32 is connected to the third sampling piece 33, and the second sampling piece 32 can be arranged perpendicular to the third sampling piece 33, so that the second sampling piece 32 can be conveniently connected to the piece to be sampled, without the need to bend the third sampling piece 33 toward each piece to be sampled, and the process is simple.

[0203] In some embodiments, as Figure 3 As shown, the battery cell 10 includes a terminal 104, and the first sampling member 31 is welded to the terminal 104. The first sampling member 31 is used to electrically connect adjacent battery cells 10. In the embodiment of the present application, by welding the first sampling member to the terminal, the first sampling member can not only stably achieve electrical connection between adjacent battery cells, but also achieve voltage sampling of the battery cells. The present application also provides an electrical device, which includes a battery according to any of the above embodiments, and the battery is used to provide electrical energy.

[0204] In addition to the embodiments of the claims above, specific embodiments involving more specific features or their combinations may be preferred and may be shown in the drawings.

[0205] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Box; A battery cell is disposed in the box; A low-voltage collection component is disposed in the box, and is used to collect operating state parameters of the battery cells, wherein the operating state parameters include voltage and temperature; Wherein, the low-voltage collection component includes: a first sampling component connected to the battery cell to collect the voltage of the battery cell; a second sampling component, one end of which is detachably connected to the first sampling component to transmit the voltage; a third sampling component, the third sampling component being detachably connected to the other end of the second sampling component to transmit the voltage; A fourth sampling member is connected to the second sampling member to collect the temperature of the battery cell.

2. The battery device according to claim 1, wherein: The fourth sampling member is disposed opposite to the battery cell in a first direction, wherein the first direction is a height direction of the battery cell.

3. The battery device according to claim 2, characterized in that The battery cell includes a shell and an insulating layer, the insulating layer is coated on the outside of the shell, and the insulating layer is at least partially windowed to expose the shell to form a window area; the fourth sampling member is arranged opposite to the window area.

4. The battery device according to claim 2, wherein: The fourth sampling member is disposed on a side of the second sampling member away from the battery cell in the first direction.

5. The battery device according to claim 4, characterized in that The battery further comprises: A heat conducting member is provided between the second sampling member and the battery cell in the first direction.

6. The battery device according to any one of claims 1 to 5, characterized in that: The second sampling component is provided with a fuse structure, and the fuse structure is used to provide fuse protection for the low-voltage sampling component.

7. The battery device according to claim 6, characterized in that The second sampling component is provided with at least two fuse structures, and the at least two fuse structures are used to respectively perform fuse protection on the low-voltage sampling component.

8. The battery device according to claim 7, characterized in that Among the at least two fuse structures, one fuse structure is connected to the first sampling component and the third sampling component, and the other fuse structure is disconnected from the first sampling component and the third sampling component.

9. The battery device according to claim 8, characterized in that The low-voltage collection assembly further includes a first base, which is fixed to the third sampling piece, and the second sampling piece is detachably connected to the first base, so that the at least two fuse structures can respectively provide fuse protection for the low-voltage collection assembly.

10. The battery device according to claim 9, characterized in that The first base is provided with a plurality of limiting cavities, the number of which is the same as the number of the fuse structures. The second sampling member is inserted into one of the plurality of limiting cavities to achieve connection between one of the fuse structures and the first sampling member and the third sampling member.

11. The battery device according to claim 10, characterized in that The first base is configured as an insulator, each of the limiting cavities is provided with a contact, the second sampling member is inserted into the limiting cavity, and the contact electrically connects one of the fuse structures and the third sampling member.

12. The battery device according to claim 11, wherein: The plurality of limiting cavities in the first base are arranged sequentially in the first direction.

13. The battery device according to claim 12, characterized in that The first base includes a main body and a partition. The main body is hollow. The partition is arranged in the main body to divide the main body into two limiting cavities. The contact is arranged on the inner wall surface of each main body close to the limiting cavity.

14. The battery device according to claim 13, wherein: The contact is disposed on a first inner wall surface of the main body, and the first inner wall surface is disposed opposite to the partition in the first direction.

15. The battery device according to claim 14, characterized in that The second sampling piece includes two fuse structures, which are respectively arranged on both sides of the second sampling piece in the first direction. When the second sampling piece is inserted into the limiting cavity, one of the fuse structures is electrically connected to the contact in the limiting cavity.

16. The battery device according to claim 15, characterized in that The second sampling member includes a substrate and an insulating film, the insulating film is coated on two opposite sides of the substrate in the first direction, the two fuse structures are respectively arranged between the insulating film and the substrate, and the second sampling member is provided with a through conductive hole, which is used to conduct the two oppositely arranged fuse structures.

17. The battery device according to claim 6, wherein: The fusing structure is configured as a resistance fuse.

18. The battery device according to claim 9, wherein: The first base is connected to the third sampling piece by welding or gluing.

19. The battery device according to any one of claims 1 to 5, characterized in that: The low-pressure sampling assembly further includes a second base, and the second base is used to detachably fix the second sampling member and the first sampling member.

20. The battery device according to claim 19, wherein: The second base includes a first connecting member and a second connecting member, the first connecting member and the second connecting member are detachably connected, one of the first sampling member and the second sampling member is fixed to the first connecting member, and the other of the first sampling member and the second sampling member is limited and fixed between the first connecting member and the second connecting member.

21. The battery device according to claim 20, characterized in that The first connecting member is fixed to the second sampling member. The first sampling member includes a collecting portion and an extending portion. The collecting portion is used to be welded to the battery cell. The extending portion is connected to the collecting portion and is clamped and fixed between the first connecting member and the second connecting member.

22. The battery device according to claim 21, characterized in that The first connecting member includes a first clamping portion, and the second connecting member includes a second clamping portion and a third clamping portion. The second clamping portion and the third clamping portion are spaced apart in a second direction, the second direction is perpendicular to the first direction, and the second clamping portion and the third clamping portion abut against both ends of the extension portion in the second direction.

23. The battery device according to claim 22, characterized in that The first clamping portion and the second clamping portion are fixed in a limited position in the first direction, and the third clamping portion and the extending portion are fixed in a limited position in the first direction.

24. The battery device according to claim 23, characterized in that The first connecting member further includes a fourth clamping portion, and the second connecting member further includes a fifth clamping portion. The fourth clamping portion and the fifth clamping portion are fixed in a limited position in the first direction.

25. The battery device according to claim 24, characterized in that The fourth clamping portion and the first clamping portion are spaced apart in the second direction, and the first connecting member is further provided with a penetrating avoidance hole, the avoidance hole is located between the first clamping portion and the fourth clamping portion in the second direction, and the fourth sampling member is passed through the avoidance hole.

26. The battery device according to claim 25, characterized in that In the case where a plurality of battery cells are provided, the second direction is a direction in which the plurality of battery cells are arranged.

27. The battery device according to claim 26, characterized in that The third sampling member is extended along the second direction.

28. The battery device according to claim 1, wherein: The battery cell includes a pole, the first sampling piece is welded to the pole, and the first sampling piece is used to electrically connect adjacent battery cells.

29. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 28, wherein the battery device is used to provide electrical energy.

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