Battery apparatus and electric device

Abstract

The present application provides a battery apparatus (100) and an electric device. The battery apparatus (100) comprises: a case (2); a battery cell (10) arranged inside the case (2); and a low-voltage acquisition assembly (3) arranged inside the case (2), the low-voltage acquisition assembly (3) being used for acquiring operating state parameters of the battery cell (10), and the operating state parameters including voltage and temperature. The low-voltage acquisition assembly (3) comprises: a first sampling member (31), the first sampling member (31) being connected to the battery cell (10) so as to acquire the voltage of the battery cell (10); a second sampling member (32), one end of the second sampling member (32) being detachably connected to the first sampling member (31) so as to transmit the voltage; a third sampling member (33), the third sampling member (33) being detachably connected to the other end of the second sampling member (32) so as to transmit the voltage; and a fourth sampling member (34), the fourth sampling member (34) being connected to the second sampling member (32) so as to acquire the temperature of the battery cell (10).

Description

A battery device and electrical equipment

[0001] This application claims priority to Chinese Patent Application No. 202422182642.X, filed on September 6, 2024, entitled "A Battery Device and Electrical Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0004] With the widespread use of batteries, frequent charging and discharging during use can lead to battery malfunctions over long periods, making maintenance of related battery devices inconvenient. Summary of the Invention

[0005] The purpose of this application is to provide a battery device and electrical equipment, aiming to solve the technical problem of how to reduce the difficulty of battery device maintenance.

[0006] The technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, this application provides a battery device, comprising:

[0008] Box;

[0009] The individual battery cells are housed inside the casing.

[0010] The low-voltage acquisition component is located inside the enclosure. The low-voltage acquisition component is used to collect the operating status parameters of the battery cells, including voltage and temperature.

[0011] The low-voltage acquisition component includes:

[0012] The first sampling device is connected to a single battery cell to collect the voltage of the single battery cell;

[0013] A second sampling element, one end of which is detachably connected to the first sampling element to transmit voltage;

[0014] The third sampling element is detachably connected to the other end of the second sampling element to transmit voltage;

[0015] The fourth sampling element is connected to the second sampling element to collect the temperature of the battery cells.

[0016] This application provides a battery device including a housing, individual battery cells, and a low-voltage acquisition component. The individual battery cells are housed within the housing, and the low-voltage acquisition component is also housed within the housing. The low-voltage acquisition component is used to acquire the operating status parameters of the individual battery cells, including voltage and temperature. The low-voltage acquisition component includes a first sampling element, a second sampling element, and a third sampling element. The first sampling element is connected to the individual battery cells to acquire their voltage. One end of the second sampling element is detachably connected to the first sampling element to transmit voltage. The third sampling element is detachably connected to the other end of the second sampling element to transmit voltage. A fourth sampling element is connected to the second sampling element to acquire the temperature of the individual battery cells. This application embodiment provides a detachable second sampling element between the first and second sampling elements. In cases of sampling failure or other situations requiring maintenance of the low-voltage sampling component, the second sampling element can be separated from the first and third sampling elements, facilitating direct replacement of either the second or third sampling element without needing to replace the first sampling element. This reduces the difficulty and cost of battery device maintenance and improves the maintenance efficiency of the low-voltage acquisition component. Furthermore, the fourth sampling element is connected to the second sampling element. In the event of a meltdown in the fourth sampling element, the second sampling element can be directly disassembled to replace both the fourth and second sampling elements without needing to replace the entire battery device or the entire low-voltage acquisition component, further reducing battery device maintenance costs.

[0017] In some embodiments, the fourth sampling element is disposed opposite to the battery cell in a first direction, wherein the first direction is the height direction of the battery cell.

[0018] This application embodiment improves the accuracy of temperature sampling by arranging the fourth sampling element opposite to the battery cell in a first direction, thereby increasing the working efficiency of the battery device. In some embodiments, the battery cell includes a casing and an insulating layer, the insulating layer covering the outside of the casing, and the insulating layer is at least partially open to expose the casing, forming an open area; the fourth sampling element is arranged opposite to the open area.

[0019] This embodiment of the application provides an opening area for the insulating layer on the casing of the battery cell, which satisfies the insulation requirements of other locations on the casing. The fourth sampling element is positioned opposite the opening area, reducing the risk of heat being isolated by the insulating layer and improving the accuracy of the fourth sampling element in sampling the temperature of the battery cell.

[0020] In some embodiments, the fourth sampler is disposed on the side of the second sampler away from the battery cell in the first direction.

[0021] In this embodiment, by placing the fourth sampling element on the side of the second sampling element away from the battery cell in the first direction, the fourth sampling element can be used to sample the temperature of the battery cell while reducing the interference of the installation of the fourth sampling element on the battery cell. This is beneficial to improving the space utilization of the assembly and further improving the energy density of the battery device.

[0022] In some embodiments, the battery further includes:

[0023] In the first direction, the heat-conducting component is disposed between the second sampling component and the battery cell.

[0024] In this embodiment, a heat-conducting element is placed between the second sampling element and the battery cell. The heat-conducting element can transfer the heat of the battery cell to the second sampling element, so that the second sampling element can accurately collect the temperature of the battery cell, thereby improving the working efficiency of the battery device.

[0025] In some embodiments, the second sampling element is provided with a fusible structure for fusing protection of the low-voltage acquisition component.

[0026] In this embodiment, the fuse structure is located on the second sampling component, which allows for a more flexible layout. Furthermore, when a fuse structure blows, the second sampling component can be disassembled and replaced separately without replacing the first and third sampling components, thus reducing the need to replace the first and third sampling components simultaneously and further reducing battery maintenance costs.

[0027] In some embodiments, the second sampling element is provided with at least two fuse structures, which are used to provide fuse protection for the low-voltage acquisition component.

[0028] This application embodiment sets multiple fuse structures on the second sampling element. After one fuse structure on the second sampling element blows, there is no need to replace the second sampling element. Only the connection position or connection state of the second sampling element needs to be adjusted. This allows the other fuse structures on the second sampling element to continue to blow and protect the first and third sampling elements, reducing the maintenance cost of the second sampling element and improving the maintenance efficiency of the battery device.

[0029] In some embodiments, of the at least two fusible structures, one fusible structure is connected to the first sampling element and the third sampling element, while the other fusible structures are disconnected from the first sampling element and the third sampling element.

[0030] This application embodiment sets multiple fuse structures 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. Only the connection state between different fuse structures in the second sampling component and the first and third sampling components needs to be changed to achieve new fuse protection. This reduces the maintenance cost of the low voltage protection component and improves the maintenance efficiency of the battery device.

[0031] In some embodiments, the low-voltage acquisition component further includes a first base, which is fixed to a third sampling element, and a second sampling element is detachably connected to the first base, so as to realize at least two fuse structures to provide fuse protection for the low-voltage acquisition component.

[0032] This embodiment of the application improves the efficiency of replacing the fuse structure in the second sampling component after it melts by detachably setting the second sampling component to the first base. The connection state between the second sampling component and the first base can be quickly adjusted by disassembly and assembly, thereby improving the maintenance efficiency of the second sampling component.

[0033] In some embodiments, the first base is provided with multiple limiting cavities, the number of which is the same as the number of fusible structures. The second sampling element is inserted into one of the multiple limiting cavities to achieve connection between a fusible structure and the first and third sampling elements.

[0034] In this embodiment, the first base is provided with a plurality of limiting cavities corresponding to the number of fusible structures, so that each limiting cavity can correspond to a fusible structure. When the second sampling component is inserted into a limiting cavity, the fusible structure in the second sampling component can be made conductive with the circuit. The setting of the limiting cavity is beneficial to improving the installation stability of the second sampling component and also beneficial to improving the connection stability of the circuit where the fusible structure is located.

[0035] In some embodiments, the first base is configured as an insulator, each limiting cavity is provided with a contact, the second sampling element is inserted into the limiting cavity, and the contact electrically connects a fusible structure with the third sampling element.

[0036] This embodiment of the application, by setting the first base as an insulator and electrically connecting the fusible structure and the third sampling element through the contacts in the limiting cavity, helps to reduce the risk of battery cell creep.

[0037] In some embodiments, multiple limiting cavities in the first base are arranged sequentially in a first direction.

[0038] In this embodiment, by sequentially arranging multiple limiting cavities in the first base in the height direction, it is beneficial to match the direction in which the second sampling component can move easily, thereby improving the convenience of assembling and disassembling the second sampling component and further enhancing the reliability of the connection between the second sampling component and the first base.

[0039] In some embodiments, the first base includes a body portion and a partition portion. The body portion is hollow, and the partition portion is disposed within the body portion to divide the body portion into two limiting cavities. Contacts are disposed on the inner wall surface of each body portion near the limiting cavity.

[0040] In this embodiment, the first base is configured as a main body and a partition. The partition divides the interior of the main body into two limiting cavities. When the second sampling component is connected to one of the limiting cavities, an electrical contact is achieved between a fusible structure and a contact point inside the limiting cavity. This connection method is stable and highly reliable, and the disassembly and assembly method is convenient.

[0041] In some embodiments, the contact is disposed on the first inner wall surface of the body portion, and the first inner wall surface and the partition portion are disposed opposite to each other in a first direction.

[0042] In this embodiment, by setting the contacts on the first inner wall surface of the main body, the second sampling member, when inserted into different limiting cavities, can have its two opposing surfaces in the first direction contact different inner wall surfaces. Specifically, the partition can divide the main body into an upper limiting cavity and a lower limiting cavity arranged sequentially in the first direction. When the second sampling member is engaged with the upper limiting cavity, the upper surface of the second sampling member contacts the contacts on the first inner wall surface of the upper limiting cavity. When the second sampling member is engaged with the lower limiting cavity, the lower surface of the second sampling member contacts the contacts on the first inner wall surface of the lower limiting cavity. Physically separating the two fusible structures helps reduce mutual interference between different fusible structures and improves the stability and reliability of the fusible structure operation.

[0043] In some embodiments, the second sampling element includes two fusible structures, which are respectively disposed on both sides of the second sampling element in the first direction. When the second sampling element is inserted into the limiting cavity, one of the fusible structures is electrically connected to a contact in the limiting cavity.

[0044] In this embodiment, two fusible structures are disposed on both sides of the second sampling member in the first direction, so that the two fusible structures are integrally formed on the second sampling member. When replacing the fusible structures, only the limiting cavity into which the second sampling member is inserted needs to be replaced. This replacement method is simple and quick, which improves the maintenance efficiency of the fusible structures and helps to reduce the maintenance cost of the battery device.

[0045] In some embodiments, the second sampling element includes a substrate and an insulating film, the insulating film covering opposite sides of the substrate in a first direction, two fused structures being disposed between the insulating film and the substrate, and the second sampling element having a through-hole for connecting the two oppositely disposed fused structures.

[0046] By adopting the above technical solution, the second sampling component is provided with a fusible structure on both sides. After the fusible structure on one side of the second sampling component melts, the fusible structure on the other side of the second sampling component can be used for fusible protection. In this way, the second sampling component can be reused once, further reducing the maintenance cost of the low-voltage acquisition component.

[0047] In some embodiments, the fusible link is configured as a resistor fuse. By configuring the fusible link as a resistor fuse, embodiments of this application help protect the battery device and reduce risks such as thermal runaway.

[0048] In some embodiments, the first base and the third sampling element are welded or glued together. The permanent fixing method of the first base and the third sampling element in the embodiments of this application helps to improve the reliability of the connection between the first base and the third sampling element.

[0049] In some embodiments, the low-voltage acquisition assembly further includes a second base for detachably securing the second sampling element and the first sampling element.

[0050] This application embodiment uses a second base to achieve a detachable connection between the first sampling component and the second sampling component, reducing the difficulty of assembling and disassembling the second sampling component relative to the first sampling component, thereby helping to reduce the maintenance difficulty and cost of the low-voltage acquisition component.

[0051] In some embodiments, the second base includes a first connector and a second connector, the first connector and the second connector being detachably connected, one of the first sampling member and the second sampling member being fixed to the first connector, and the other of the first sampling member and the second sampling member being limited and fixed between the first connector and the second connector.

[0052] This embodiment of the application detachably connects the first connector and the second connector. Detachable means that the first connector and the second connector can be in a connected or disconnected state. When the first connector and the second connector are connected, one of the first sampling component and the second sampling component is fixed to the first connector, and the second sampling component is limited between the first connector and the second connector. This disassembly and assembly method is stable and reliable, and helps to improve disassembly and assembly efficiency.

[0053] In some embodiments, the first connector is fixed to the second sampling member. The first sampling member includes a collection part and an extension part. The collection part is used to weld to the battery cell, and the extension part is connected to the collection part and is snapped and fixed between the first connector and the second connector.

[0054] In this embodiment, the collection section and the extension section can be integrally formed. The collection section can be configured as a square structure, which helps to ensure the current flow area for welding the first sampling component to the battery cell and improves the stability of the welding. The extension section is configured as a narrow strip structure, which facilitates the limiting and fixing of the second base and the extension section, and reduces the difficulty of assembling the second base and the first sampling component.

[0055] In some embodiments, the first connector includes a first snap-fit ​​portion, and the second connector includes a second snap-fit ​​portion and a third snap-fit ​​portion. The second snap-fit ​​portion and the third snap-fit ​​portion are spaced apart in a second direction, which is perpendicular to the first direction, and the second snap-fit ​​portion and the third snap-fit ​​portion abut against the two ends of the extension in the second direction.

[0056] In this embodiment, by engaging the extension with the second and third engaging brackets provided on the second connector, it is beneficial to quickly assemble and disassemble the first sampling component and the second base, thereby improving the assembly and maintenance efficiency of the low-voltage acquisition component.

[0057] In some embodiments, the first latching portion and the second latching portion are limited and fixed in a first direction, and the third latching portion and the extension portion are limited and fixed in a first direction.

[0058] The embodiments of this application achieve limiting in the first direction through the first snap-fit ​​part and the second snap-fit ​​part, and limit in the first direction through the third snap-fit ​​part and the extension part. This can satisfy both the stable relative position of the first sampling member and the second base and the stable relative position of the second base and the second sampling member. The structure is simple and easy to assemble and disassemble.

[0059] In some embodiments, the first connector further includes a fourth snap-fit ​​portion, and the second connector further includes a fifth snap-fit ​​portion, with the fourth snap-fit ​​portion and the fifth snap-fit ​​portion being fixed at an upper limit in a first direction.

[0060] The embodiments of this application improve the stability of the connection between the first connector and the second connector in the first direction by fixing the fourth and fifth snap-fit ​​portions at the upper limit in the first direction.

[0061] In some embodiments, the fourth snap-fit ​​portion is spaced apart from the first snap-fit ​​portion in the second direction, and the first connector is also provided with a through clearance hole located between the first snap-fit ​​portion and the fourth snap-fit ​​portion in the second direction, and the fourth sampling member is inserted into the clearance hole.

[0062] In this embodiment, by setting a clearance hole between the first latching portion and the fourth latching portion, the fourth sampling member can be accommodated in the gap between the first latching portion and the fourth latching portion. The clearance hole can not only avoid the fourth sampling member, but the first latching portion and the fourth latching portion can also protect the fourth sampling member.

[0063] In some embodiments, when there are multiple battery cells, the second direction is the direction in which the multiple battery cells are arranged.

[0064] In some embodiments, the third sampling element extends along the second direction. By arranging the third sampling element 33 along the second direction in this application embodiment, it is beneficial to reduce the acquisition of operating parameters of each arranged battery cell by the third sampling element, thereby improving the stability of data acquisition.

[0065] In some embodiments, a battery cell includes a terminal post, a first sampling element is welded to the terminal post, and the first sampling element is used to electrically connect adjacent battery cells. In this application embodiment, by welding the first sampling element to the terminal post, the first sampling element can both securely achieve electrical connection between adjacent battery cells and enable voltage sampling of the battery cells.

[0066] On the other hand, this application also provides an electrical appliance, including:

[0067] The aforementioned battery device is used to provide electrical energy.

[0068] This application provides an electrical device including a battery assembly. The battery assembly includes a housing, individual battery cells, and a low-voltage acquisition component. The individual battery cells are housed within the housing, and the low-voltage acquisition component is also housed within the housing. The low-voltage acquisition component is used to acquire the operating status parameters of the individual battery cells, including voltage and temperature. The low-voltage acquisition component includes a first sampling element, a second sampling element, and a third sampling element. The first sampling element is connected to the individual battery cells to acquire their voltage. One end of the second sampling element is detachably connected to the first sampling element to transmit voltage. The third sampling element is detachably connected to the other end of the second sampling element to transmit voltage. A fourth sampling element is connected to the second sampling element to acquire the temperature of the individual battery cells. This application embodiment provides a detachable second sampling element between the first and second sampling elements. In cases of sampling failure or other situations requiring maintenance of the low-voltage sampling component, the second sampling element can be separated from the first and third sampling elements, facilitating direct replacement of either the second or third sampling element without needing to replace the first sampling element. This reduces the difficulty and cost of battery device maintenance and improves the maintenance efficiency of the low-voltage acquisition component. Furthermore, the fourth sampling element is connected to the second sampling element. In the event of a meltdown in the fourth sampling element, the second sampling element can be directly disassembled to replace both the fourth and second sampling elements without needing to replace the entire battery device or the entire low-voltage acquisition component, further reducing battery device maintenance costs. Attached Figure Description

[0069] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0070] Figure 1 is a schematic diagram of the structure of the electrical equipment disclosed in the embodiments of this application;

[0071] Figure 2 is a schematic diagram of the structure of the battery device disclosed in an embodiment of this application;

[0072] Figure 3 is a schematic diagram of the assembly of a single battery cell and a low-voltage acquisition component disclosed in an embodiment of this application;

[0073] Figure 4 is a schematic diagram of the structure of the low voltage acquisition component disclosed in the embodiment of this application;

[0074] Figure 5 is a front view of the second sampling component disclosed in an embodiment of this application;

[0075] Figure 6 is a schematic diagram of the back of the second sampling component disclosed in an embodiment of this application;

[0076] Figure 7 is an enlarged view of part A in Figure 4.

[0077] The accompanying drawings are not drawn to scale.

[0078] Markings: 1000, vehicle; 100, battery pack; 200, controller; 300, motor; 10, battery cell; 101, casing; 102. Insulation layer; 103. Window area; 104. Electrode; 214. Top cover; 211. Supporting component; 2. Housing; 3. Low-voltage acquisition component; 31. First sampling component; 311. Acquisition section; 312. Extension section; 32. Second sampling component; 3201. First surface; 3202. Second surface; 321. Fusible structure; 323. Through hole; 324. Welded structure; 33. Third sampling component; 34. Fourth sampling component; 35. First base; 351. Limiting cavity; 352. Body section; 353. Separator section; 36. Second base; 361. First connecting component; 3611. First snap-fit ​​section; 3612. Fourth snap-fit ​​section; 3613. Clearance hole; 3623. Fifth snap-fit ​​section; 362. Second connecting component; 3621. Second snap-fit ​​section; 3622. Third snap-fit ​​section; 4. Heat-conducting component. Detailed Implementation

[0079] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0080] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.

[0081] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0082] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0083] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0084] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and 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 construed as limitations on the embodiments of this application.

[0085] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0086] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0087] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power 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 cars, as well as in aerospace and other fields.

[0088] With the government's strong promotion of new energy vehicles, they have ushered in a golden opportunity for development. Vehicle safety and stability have always been top concerns. Therefore, improving the safety of new energy vehicles will be one of the key factors determining their rapid popularization. Improving battery safety is a crucial way to enhance the overall safety of new energy vehicles.

[0089] The battery apparatus mentioned in the embodiments of this application refers to a single physical module comprising one or more individual battery cells, or one or more battery cell assemblies, for providing higher voltage and capacity. A battery cell assembly may include multiple individual battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0090] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, where multiple battery cells are arranged and fixed together to form an independent battery module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0091] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0092] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0093] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0094] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house individual battery cells or battery module assemblies. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0095] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house individual battery cells or battery module assemblies.

[0096] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0097] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0098] A single battery cell may include an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated positive current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated negative current collector, serving 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, etc. To ensure that a large current can pass through without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0099] For example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0100] For example, the positive electrode current collector can be a metal foil or a composite current collector. For instance, the metal foil can be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium. The composite current collector may include a polymer substrate and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0101] For example, the negative electrode can be a negative electrode sheet, which may include a negative electrode current collector.

[0102] For example, the negative electrode current collector can be a metal foil or a composite current collector. For instance, as a metal foil, it can be 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.

[0103] For example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0104] Exemplarily, the negative electrode active material may be any negative electrode active material known in the art for use in batteries. 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, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional 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.

[0105] Exemplarily, the housing includes a top cover and an outer shell, the outer shell having an opening, and the top cover closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The outer shell may have one or more openings. The top cover may also have one or more openings.

[0106] For example, the housing is provided with at least one electrode terminal, which 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 located on the top cover or on the outer casing.

[0107] For example, a pressure relief component is provided on the housing. The pressure relief component is used to release the internal pressure of the battery cell. It should be noted that the pressure relief component can be an explosion-proof valve or a pressure relief port, etc.

[0108] The development of battery technology must take into account multiple design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters. In addition, the safety and reliability of the battery also need to be considered.

[0109] Currently, battery devices detect the battery's operating status by incorporating low-voltage acquisition components. These components collect sampling signals from individual battery cells. However, when defects such as open circuits, short circuits, or product defects occur, the low-voltage acquisition components may fail to collect signals from individual battery cells. Furthermore, existing low-voltage acquisition components are fixed as a single unit. If these components malfunction, the entire battery device must be disassembled, making repair difficult and costly.

[0110] To address the challenges of high maintenance difficulty and cost associated with sampling structures, this application proposes a sampling component, including a conductive connector, a main circuit board, and a sampling circuit board connected between the conductive connector and the main circuit board. The conductive connector connects to the component to be sampled, and the sampling circuit board acquires and transmits the sampling signal 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 via the conductive connector. It acquires the sampling signal from the component and transmits it to the main circuit board to sample data such as voltage of the component. In the event of sampling failure, since the sampling circuit board is detachably connected to the conductive connector, it can be directly separated from the conductive connector for replacement of both the sampling circuit board and the main circuit board. This sampling component allows for replacement of both the sampling circuit board and the main circuit board in case of sampling failure, eliminating the need to replace the conductive connector, thus saving maintenance costs, reducing maintenance difficulty, and improving the maintenance efficiency of the sampling component.

[0111] The technical solutions described in this application are applicable to data acquisition from a sample. The sample can be a single battery cell or a battery. The acquired data can be electrical data, such as voltage and temperature.

[0112] The sample to be sampled is placed in an electrical device, which can be a vehicle, mobile phone, portable device, laptop, ship, spacecraft, electric toy, or power tool, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the aforementioned electrical devices.

[0113] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0114] Referring to Figure 1, a controller 200, a motor 300, and a battery device 100 can be installed inside the vehicle 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0115] To meet different power demands, the battery device 100 may include multiple battery cells 10, where each battery cell 10 is the smallest unit that makes up a battery module or battery device 100. Multiple battery cells 10 can be connected in series, parallel, or in a hybrid configuration, where some cells are connected in series and others in parallel. Multiple battery cells 10 can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of the multiple battery cells 10 is housed within a casing. Alternatively, the battery device 100 can also consist of multiple battery cells first connected in series, parallel, or in a hybrid configuration to form battery modules, and then these modules are connected in series, parallel, or in a hybrid configuration to form a whole, which is then housed within a casing. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells. Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Battery cells can be cylindrical, flat, cuboid, or other shapes.

[0116] 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 combinations of simple three-dimensional structures such as cuboids, cylinders, or spheres. The enclosure material can be alloy materials such as aluminum alloy or iron alloy, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0117] The housing is used to house the battery assembly, and the housing can have various structures. In some embodiments, referring to FIG2, the housing may include a top cover 214 and a support member 211, which cover each other and together define a receiving cavity for accommodating the battery cell 10. The support member 211 may be a hollow structure open at one end, and the top cover 214 may be a plate-like structure, covering the open side of the support member 211 to form a housing with a receiving cavity; alternatively, both the top cover 214 and the support member 211 may be hollow structures open on one side, with the open side of the top cover 214 covering the open side of the support member 211 to form a housing with a receiving cavity. Of course, the top cover 214 and the support member 211 may be various shapes, such as cylinders, cuboids, etc.

[0118] To improve the sealing performance after the top cover 214 is connected to the carrier 211, a sealing element, such as sealant or sealing ring, can also be provided between the top cover 214 and the carrier 211.

[0119] Assuming the upper cover 214 covers the top of the support member 211, the upper cover 214 can also be called the upper box cover, and the support member 211 can also be called the lower box cover. This application provides a battery device, which includes a housing 2, a battery cell 10, and a low-voltage acquisition component 3. The housing 2 has a receiving cavity, and the battery cell 10 is disposed within the receiving cavity. It should be noted that the battery cell 10 represents the sample to be collected by the low-voltage acquisition component 3 in the battery device. In this application embodiment, the sample to be collected is the battery cell 10; in other embodiments, the sample to be collected can be the battery device 100.

[0120] The low-voltage acquisition component 3 is installed inside the housing 2. The low-voltage acquisition component 3 is used to acquire the operating status parameters of the battery cell 10, including voltage and temperature.

[0121] The low-voltage acquisition component 3 includes a first sampling element 31, a second sampling element 32, a third sampling element 33, and a fourth sampling element 34.

[0122] The first sampling element 31 is connected to the battery cell 10 to collect the voltage of the battery cell 10. The first sampling element 31 can be a battery strip or a busbar. The first sampling element 31 is connected to the battery cell 10 via an electrical connection and can be used to realize series or parallel connection of the battery cells 10, or to realize power transmission of the battery cells 10. When sampling the battery cells 10, sampling can be performed on a per-cell basis or on a per-module battery module. When sampling on a per-cell basis, the first sampling element 31 is connected to each battery cell 10.

[0123] One end of the second sampling element 32 is detachably connected to the first sampling element 31, and the second sampling element 32 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 be data information such as the voltage of the battery cell 10. By collecting sampling signals, the second sampling element 32 can monitor the status of the battery cell.

[0124] The third sampling element 33 is detachably connected to the other end of the second sampling element 32 to transmit voltage. The third sampling element 33 is electrically connected to the second sampling element 32 and is used to transmit sampling signals. The second sampling element 32 and / or the third sampling element 33 can be a flexible printed circuit (FPC). In other embodiments, the second sampling element 32 and / or the third sampling element 33 can also be a rigid circuit board, a rigid-flex board, or other circuit board. There can be one or more second sampling elements 32. When there are multiple second sampling elements 32, all of them are connected to the third sampling element 33, and each of the multiple second sampling elements 32 is connected to a different sampling point. The second sampling element 32 can be detachably connected to the first sampling element 31 in various ways, such as by snap-fit ​​connection, plug-in connection, or screw connection.

[0125] The second sampling component 32 and the third sampling component 33 can also be detachably connected, so when maintaining the low-voltage acquisition component 3, the second sampling component 32 can be replaced directly; the second sampling component 32 and the third sampling component 33 can also be fixedly connected, so when maintaining the low-voltage acquisition component 3, the second sampling component 32 and the third sampling component 33 can be replaced. The above maintenance schemes do not require disassembling the first sampling component 31, which reduces the maintenance difficulty and maintenance cost.

[0126] Optionally, the third sampling element 33 is disposed on one end surface of each battery cell 10, typically at one end of the electrode terminal in the height direction of the battery cell 10, covering the surface of multiple battery cells 10, so that the third sampling element 33 can be connected to each battery cell 10 to be sampled; the second sampling element 32 is connected to the third sampling element 33, and the second sampling element 32 can be set perpendicular to the third sampling element 33, so that the second sampling element 32 can be easily connected to the battery cell without bending the third sampling element 33 toward each battery cell, simplifying the process.

[0127] 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. In this embodiment, the fourth sampling element 34 represents a negative temperature coefficient sampling element, also known as a thermistor. The resistance of this fourth sampling element 34 decreases as the temperature increases. Therefore, in this embodiment, the fourth sampling element 34 can be used to implement temperature control and protection functions for monitoring the temperature of the battery cell.

[0128] It should be noted that the connection between the fourth sampling component 34 and the second sampling component 32 indicates that the connection method between the fourth sampling component 34 and the second sampling component 32 can be a fixed connection such as welding or bonding, or a detachable connection such as snap-fit. The connection method between the fourth sampling component 34 and the second sampling component 32 includes, but is not limited to, the above-mentioned methods, and the connection method between the fourth sampling component 34 and the second sampling component 32 does not limit the function of the fourth sampling component 34.

[0129] In some embodiments, the low-voltage acquisition component 3 also includes components such as plastic structural parts to realize the 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.

[0130] The battery device provided in this application includes a housing, a battery cell, and a low-voltage acquisition component. The battery cell is disposed within the housing, and the low-voltage acquisition component is disposed within the housing. The low-voltage acquisition component is used to acquire the operating status parameters of the battery cell, including voltage and temperature. The low-voltage acquisition component includes a first sampling element, a second sampling element, and a third sampling element. The first sampling element is connected to the battery cell to acquire the voltage of the battery cell. One end of the second sampling element is detachably connected to the first sampling element to transmit voltage. The third sampling element is detachably connected to the other end of the second sampling element to transmit voltage. A fourth sampling element is connected to the second sampling element to acquire the temperature of the battery cell. This application embodiment provides a detachable second sampling element between the first and second sampling elements. In cases of sampling failure or other situations requiring maintenance of the low-voltage sampling component, the second sampling element can be separated from the first and third sampling elements, facilitating direct replacement of either the second or third sampling element without needing to replace the first sampling element. This reduces the difficulty and cost of battery device maintenance and improves the maintenance efficiency of the low-voltage acquisition component. Furthermore, the fourth sampling element is connected to the second sampling element. In the event of a meltdown in the fourth sampling element, the second sampling element can be directly disassembled to replace both the fourth and second sampling elements without needing to replace the entire battery device or the entire low-voltage acquisition component, further reducing battery device maintenance costs.

[0131] In some embodiments, as shown in FIG3, the fourth sampling member 34 is disposed opposite to the battery cell 10 in a first direction, wherein the first direction is the height direction of the battery cell 10.

[0132] It should be noted that the relative setting means that the orthographic projection of the fourth sampling element 34 and the battery cell 10 in the first direction at least partially overlaps. Preferably, the orthographic projection of the fourth sampling element 34 in the first direction is completely located within the orthographic projection of the battery cell 10 in the first direction.

[0133] In this embodiment, by setting the fourth sampling element opposite to the battery cell in the first direction, the accuracy of the temperature collected by the fourth sampling element is improved, thereby improving the working efficiency of the battery device.

[0134] In some embodiments, the battery cell 10 includes a housing 101 and an insulating layer 102. The insulating layer 102 covers the outside of the housing 101 and is at least partially open to expose the housing 101, forming an open window area 103. The fourth sampling member 34 is disposed opposite to the open window area 103.

[0135] It should be noted that the insulating layer is used to cover the outside of the shell to achieve the effect of insulation. The insulating layer can be a blue film, and the insulating layer can be a composite film made of multiple 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, flame retardants or moisture-proof layers can also be added to the insulating layer.

[0136] It should be noted that the opening means that the insulation layer 102 covers the outside of the housing 101, but in the opening area 103, the insulation layer 102 is hollowed out, and the housing 101 does not have an insulation layer 102 on the outside of the opening area 103.

[0137] The fact that the fourth sampling element 34 is positioned opposite to the window area 103 means that the fourth sampling element 34 and the window area 103 are positioned opposite 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 element 34 in the first direction overlaps with the projection of the window area 103 in the first direction. The window area 103 is located at one end of the battery cell in the height direction. For example, the window area 103 is located at the top or bottom of the housing 101.

[0138] This embodiment of the application provides an opening area for the insulating layer on the casing of the battery cell, which satisfies the insulation requirements of other locations on the casing. The fourth sampling element is positioned opposite the opening area, reducing the risk of heat being isolated by the insulating layer and improving the accuracy of the fourth sampling element in sampling the temperature of the battery cell.

[0139] In some embodiments, as shown in FIG3, the fourth sampling member 34 is disposed on the side of the second sampling member 32 away from the battery cell 10 in the first direction. The second sampling member 32 has two opposing sides in the first direction, one side being attached to the battery cell and the other side being away from the battery cell.

[0140] In this embodiment, by placing the fourth sampling element on the side of the second sampling element away from the battery cell in the first direction, the fourth sampling element can be used to sample the temperature of the battery cell while reducing the interference of the installation of the fourth sampling element on the battery cell. This is beneficial to improving the space utilization of the assembly and further improving the energy density of the battery device.

[0141] In some embodiments, as shown in FIG3, the battery device further includes a heat-conducting element 4. In a first direction, the heat-conducting element 4 is disposed between the second sampling element 32 and the battery cell 10.

[0142] In this embodiment, by placing a heat-conducting element between the second sampling element and the battery cell, the heat-conducting element 4 can transfer the heat of the battery cell 10 to the second sampling element 32, so that the second sampling element 32 can accurately collect the temperature of the battery cell, thereby improving the working efficiency of the battery device.

[0143] In some embodiments, as shown in Figures 4-6, the second sampling element 32 is provided with a fuse structure 321, which is used to provide fuse protection for the low-voltage acquisition component.

[0144] In this embodiment, the fuse structure is located on the second sampling element 32, which makes the layout of the fuse structure more flexible. Furthermore, when a fuse structure melts, the second sampling element 32 can be disassembled and replaced separately without replacing the first and third sampling elements, thus reducing the need to replace the first and third sampling elements simultaneously and further reducing battery maintenance costs.

[0145] In some embodiments, as shown in Figures 4-6, the second sampling element 32 is provided with at least two fuse structures 321, which are used to provide fuse protection for the low-voltage acquisition component.

[0146] It should be noted that the second sampling element 32 in this embodiment has multiple fuse structures 321. The number of fuse structures 321 on the same second sampling element 32 can be two, three, four, etc. At any given time, only one fuse structure 321 is used to fuse and protect the first and third sampling elements. That is, the other fuse structures 321 are disconnected from the first and third sampling elements. After the current fuse structure 321 blows, the position or connection state of the second sampling element 32 can be changed so that the other fuse structures 321 protect the first and third sampling elements, thus achieving the goal that only one fuse structure fuses and protects the first and third sampling elements at any given time.

[0147] This application embodiment sets multiple fuse structures on the second sampling element. After one fuse structure on the second sampling element blows, there is no need to replace the second sampling element. Only the connection position or connection state of the second sampling element needs to be adjusted. This allows the other fuse structures on the second sampling element to continue to blow and protect the first and third sampling elements, reducing the maintenance cost of the second sampling element and improving the maintenance efficiency of the battery device.

[0148] In some embodiments, as shown in Figures 4-6, in at least two fusible structures 321, one fusible structure 321 is connected to the first sampling element 31 and the third sampling element 33, while the other fusible structures 321 are disconnected from the first sampling element 31 and the third sampling element 33.

[0149] This application embodiment sets multiple fuse structures 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. Only the connection state between different fuse structures in the second sampling component and the first and third sampling components needs to be changed to achieve new fuse protection. This reduces the maintenance cost of the low voltage protection component and improves the maintenance efficiency of the battery device.

[0150] In some embodiments, as shown in Figures 3 and 4, the low-voltage acquisition component 3 further includes a first base 35, which is fixed to the third sampling component 33. It should be noted that the embodiments of this application do not limit the fixing form of the first base 35 and the third sampling component 33. For example, the fixing of the first base 35 and the third sampling component 33 includes, but is not limited to, permanent fixing methods such as bonding and welding, as well as detachable fixing methods such as snap-fitting.

[0151] As shown in Figure 3, the second sampling element 32 is detachably connected to the first base 35, enabling at least two fusible structures to provide fusible protection for the low-voltage acquisition component. "Detachable" means that the second sampling element 32 and the second base 36 can remain connected or disconnected; that is, the connection between the second sampling element 32 and the second base 36 is non-permanent. This makes the connection between the second sampling element 32 and the second base 36 more flexible. When the second sampling element 32 requires repair or maintenance, the second connector 362 can be detached from the second base 36 for direct maintenance, improving the maintainability of the second connector 362. Furthermore, if the fusible structure on the second sampling element 32 blows, the connection between the second sampling element 32 and the second base 36 can be adjusted by detaching the second sampling element 32 relative to the second base 36, allowing different fusible structures to maintain continuity with the first and third sampling elements.

[0152] It should be noted that, in addition to being physically connected, the first base and the third sampling component in this embodiment of the application are also electrically connected.

[0153] This embodiment of the application improves the efficiency of replacing the fuse structure in the second sampling component after it melts by detachably setting the second sampling component to the first base. The connection state between the second sampling component and the first base can be quickly adjusted by disassembly and assembly, thereby improving the maintenance efficiency of the second sampling component.

[0154] In some embodiments, as shown in FIG4, the first base 35 is provided with a plurality of limiting cavities 351, the number of limiting cavities 351 being the same as the number of fusible structures 321, and the second sampling member 32 is inserted into one of the plurality of limiting cavities 351 to realize the connection between a fusible structure 321 and the first sampling member 31 and the third sampling member 33.

[0155] For example, when three fuse structures 321 are provided on the second sampling element 32, three limiting cavities 351 can be provided on the first base 35. The second sampling element 32 is inserted into one limiting cavity 351, thereby realizing the fuse protection of the first sampling element and the third sampling element by one fuse structure 321 in the second sampling element 32. That is, under normal conditions, one fuse structure 321 of the second sampling element 32 connects the first sampling element and the third sampling element, and the fuse structure can detect the circuit status of the first sampling element and the third sampling element. Under the condition of overcurrent in the circuit, the fuse structure will melt, thereby realizing the protection of the first sampling element and the third sampling element. In the above process, the other two fuse structures remain in a non-connected state with the first sampling element and the third sampling element.

[0156] After the current fuse structure blows, the second sampling element needs maintenance. Simply moving the second sampling element from its current limiting cavity 351 to another limiting cavity allows the circuit containing the other un-blown fuse structures to remain connected to the circuit containing the first and third sampling elements, thus providing a new fuse structure for circuit protection. This second sampling element has three opportunities for fuse protection without the need for frequent replacements.

[0157] It should be noted that in the second sampling component of this application embodiment, there are multiple fusion structures, and the number of limiting cavities in the first base is equal to the number of fusion structures. The number of fusion structures can be two, three, four, five, etc. The above embodiments only describe some specific implementation methods, but the working principle of other embodiments is similar to the above embodiments, and they are all within the protection scope of this application.

[0158] In this embodiment, the first base is provided with a plurality of limiting cavities corresponding to the number of fusible structures, so that each limiting cavity can correspond to a fusible structure. When the second sampling component is inserted into a limiting cavity, the fusible structure in the second sampling component can be made conductive with the circuit. The setting of the limiting cavity is beneficial to improving the installation stability of the second sampling component and also beneficial to improving the connection stability of the circuit where the fusible structure is located.

[0159] In some embodiments, as shown in Figures 3 and 4, the first base 35 is configured as an insulator, and each limiting cavity 351 is provided with a contact. The second sampling element 32 is inserted into the limiting cavity 351, and the contact electrically connects a fusible structure 321 to the third sampling element 33. The insulator designation indicates that the first base 35 is supported by a non-conductive material.

[0160] This embodiment of the application, by setting the first base as an insulator and electrically connecting the fusible structure and the third sampling element through the contacts in the limiting cavity, helps to reduce the risk of battery cell creep.

[0161] In some embodiments, a plurality of limiting cavities 351 in the first base 35 are sequentially arranged in the first direction. That is, the plurality of limiting cavities 351 are arranged sequentially in the height direction of the battery cell. When the connection between the fuse structure and the third sampling element is changed, only the position of one end of the second sampling element in the height direction needs to be changed to realize the connection relationship between the second sampling element and different limiting cavities 351. This enables the replacement of the fuse structure and makes the second sampling element more flexible in the first direction.

[0162] In this embodiment, by sequentially arranging multiple limiting cavities in the first base in the height direction, it is beneficial to match the direction in which the second sampling component can move easily, thereby improving the convenience of assembling and disassembling the second sampling component and further enhancing the reliability of the connection between the second sampling component and the first base.

[0163] In some embodiments, as shown in FIG4, the first base 35 includes a body portion 352 and a partition portion 353. The body portion 352 is hollow, and the partition portion 353 is disposed within the body portion to divide the body portion into two limiting cavities. Contacts are disposed on the inner wall surface of each body portion near the limiting cavity. It should be noted that the embodiments of this application do not limit the way the partition portion 353 divides the body portion 352, as long as the partition portion 353 can divide the body portion 352 into two independent limiting cavities 351. For example, the partition portion 353 can divide the interior of the body portion 352 into two limiting cavities 351 arranged sequentially in the width direction of the battery cell, or the partition portion 353 can divide the body portion 352 into two limiting cavities 351 arranged sequentially in the height direction of the battery cell, or, in other embodiments, the partition portion 353 can divide the body portion 352 into two limiting cavities 351 arranged sequentially in the length direction of the battery cell. It should be noted that the partitioning methods of the partition portion 353 in the embodiments of this application include, but are not limited to, the above-mentioned embodiments.

[0164] In this embodiment, the first base is configured as a main body and a partition. The partition divides the interior of the main body into two limiting cavities. When the second sampling component is connected to one of the limiting cavities, an electrical contact is achieved between a fusible structure and a contact point inside the limiting cavity. This connection method is stable and highly reliable, and the disassembly and assembly method is convenient.

[0165] In some embodiments, as shown in FIG7, the contact is disposed on the first inner wall surface of the body portion 352, and the first inner wall surface and the partition portion 353 are disposed opposite to each other in a first direction.

[0166] It should be noted that the limiting cavity 351 in this embodiment of the application is provided with multiple inner wall surfaces, wherein the first inner wall surface is the wall surface in the limiting cavity 351 that is disposed opposite to the partition 353 in the first direction, and each limiting cavity 351 is provided with a first inner wall surface.

[0167] In this embodiment, by setting the contacts on the first inner wall surface of the main body, the second sampling member, when inserted into different limiting cavities, can have its two opposing surfaces in the first direction contact different inner wall surfaces. Specifically, the partition 353 can divide the main body 352 into an upper limiting cavity 351 and a lower limiting cavity 351 arranged sequentially in the first direction. When the second sampling member is engaged with the upper limiting cavity, the upper surface of the second sampling member contacts the contacts on the first inner wall surface of the upper limiting cavity. When the second sampling member is engaged with the lower limiting cavity, the lower surface of the second sampling member contacts the contacts on the first inner wall surface of the lower limiting cavity. Physically separating the two fusible structures helps reduce mutual interference between different fusible structures and improves the stability and reliability of the fusible structure operation.

[0168] In some embodiments, the second sampling member includes two fusible structures, which are respectively disposed on both sides of the second sampling member in a first direction. When the second sampling member is inserted into the limiting cavity, one of the fusible structures is electrically connected to a contact in the limiting cavity.

[0169] In this embodiment of the application, the two fusible structures are respectively disposed on both sides of the second sampling member in the first direction. This means that the two fusible structures are separated on both sides of the second sampling member and are isolated from each other. An insulating layer can be provided between the two fusible structures so that the two fusible structures are not conductive and do not interfere with each other. The two fusible structures can be integrally formed by membrane pressing, and then areas that can contact the contacts are provided on the surfaces of the two membrane pressing layers, so as to realize the electrical contact between the fusible structures and the contacts respectively.

[0170] In this embodiment, two fusible structures are disposed on both sides of the second sampling member in the first direction, so that the two fusible structures are integrally formed on the second sampling member. When replacing the fusible structures, only the limiting cavity into which the second sampling member is inserted needs to be replaced. This replacement method is simple and quick, which improves the maintenance efficiency of the fusible structures and helps to reduce the maintenance cost of the battery device.

[0171] In some embodiments, the second sampling element 32 includes a substrate and an insulating film. The insulating film covers opposite sides of the substrate in a first direction. Two fused structures are respectively disposed between the insulating film and the substrate. The second sampling element 32 is provided with a through hole 323 to conduct the two opposite fused structures.

[0172] Referring to Figures 4, 5, and 6, the second sampling member 32 includes a first surface 3201 and a second surface 3202 disposed opposite to each other, and the first surface 3201 and the second surface 3202 are respectively provided with a fusible structure 321. The fusible structure 321 on one side 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 fusible structure 321 on the other side is electrically connected to the third sampling member 33.

[0173] The second sampling component 32 is a double-sided circuit board. Both the first side 3201 and the second side 3202 have circuitry, and both sides 3201 and 3202 have a fuse structure 321. Referring to Figures 4-6, in the initial state, the fuse structure 321 on one side is electrically connected to the first sampling component 31 and the third sampling component 33. When the fuse structure 321 on one side melts, the second sampling component 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 component 31 and the third sampling component 33. No replacement of the second sampling component 32 is required.

[0174] By adopting the above technical solution, the second sampling component 32 is provided with a fuse structure 321 on both sides. After the fuse structure 321 on one side of the second sampling component 32 melts, the fuse structure 321 on the other side of the second sampling component 32 can be used for fuse protection. In this way, the second sampling component 32 can be reused once, further reducing the maintenance cost of the low-voltage acquisition component.

[0175] In some embodiments, as shown in Figures 5 and 6, the second sampling element 32 is provided with a through hole 323, and the fusible structure 321 on the second surface 3202 is electrically connected to the first sampling element through the through hole 323.

[0176] The via 323 can be a through hole that passes through the second sampling element 32 or include multiple blind holes that are interconnected. The via 323 is used to connect the circuits on the first surface 3201 and the second surface 3202.

[0177] The welding structures 324 are all located on the first surface 3201. The welding structures 324 are electrically connected to the fusion structures 321 on the first surface 3201. The welding structures 324 are electrically connected to the through holes 323 and the fusion structures 321 on the second surface 3202. When the circuit on the second surface 3202 is electrically connected to the third sampling element 33, the current can flow sequentially from the first sampling element 31, the welding structures 324, the through holes 323 to the fusion structures on the second surface 3202, and then to the third sampling element 33.

[0178] By adopting the above technical solution, the first sampling element 31 only needs to be connected to one side of the second sampling element 32, which saves costs. The second sampling element 32 occupies less space in the battery device, which is conducive to improving the energy density of the battery device.

[0179] In some embodiments, both the second sampling element 32 and the third sampling element 33 are 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.

[0180] In some embodiments, the fusible link 321 is configured as a resistor fuse. The fusible link in this embodiment may be made of a conductive material. The fusible link protects the individual battery cells. If the current in the battery cell exceeds the rated current value of the resistor fuse, the fuse wire will melt, thereby cutting off the circuit and preventing overload damage to the battery cell.

[0181] The embodiments of this application, by setting the fusible structure as a resistor fuse, help protect the battery device and reduce risks such as thermal runaway.

[0182] In some embodiments, as shown in FIG4, the first base 35 is welded or glued to the third sampling element 33.

[0183] The permanent fixing method of the first base 35 and the third sampling component 33 in the embodiments of this application is beneficial to improving the reliability of the connection between the first base 35 and the third sampling component.

[0184] In some embodiments, as shown in Figures 3 and 4, the low-voltage acquisition component 3 further includes a second base 36 for detachably fixing the second sampling element 32 and the first sampling element 31.

[0185] This application embodiment uses a second base to achieve a detachable connection between the first sampling component and the second sampling component, reducing the difficulty of assembling and disassembling the second sampling component relative to the first sampling component, thereby helping to reduce the maintenance difficulty and cost of the low-voltage acquisition component.

[0186] In some embodiments, as shown in Figures 3 and 4, the second base 36 includes a first connector 361 and a second connector 362, the first connector 361 and the second connector 362 are detachably connected, one of the first sampling member 31 and the second sampling member 32 is fixed to the first connector 361, and the other of the first sampling member 31 and the second sampling member 32 is limited and fixed between the first connector 361 and the second connector 362.

[0187] This embodiment of the application detachably connects the first connector and the second connector. Detachable means that the first connector and the second connector can be in a connected or disconnected state. When the first connector and the second connector are connected, one of the first sampling component and the second sampling component is fixed to the first connector, and the second sampling component is limited between the first connector and the second connector. This disassembly and assembly method is stable and reliable, and helps to improve disassembly and assembly efficiency.

[0188] In some embodiments, as shown in Figures 3 and 4, the first connector 361 is fixed to the second sampling member 32. The first sampling member 31 includes a collection part 311 and an extension part 312. The collection part 311 is used to weld to the battery cell 10. The extension part 312 is connected to the collection part 311 and is snapped and fixed between the first connector 361 and the second connector 362.

[0189] It should be noted that the first sampling element 31 can be a bar plate, such as a copper bar or an aluminum bar.

[0190] In this embodiment, the collection part 311 and the extension part 312 can be integrally formed. The collection part 311 can be configured as a square structure, which helps to ensure the current flow area for welding the first sampling component to the battery cell and improve the stability of the welding. The extension part 312 is configured as a strip structure with a smaller width, which facilitates the limiting and fixing of the second base and the extension part 312 and reduces the difficulty of assembling the second base and the first sampling component.

[0191] In some embodiments, the first connector 361 includes a first snap-fit ​​portion 3611, and the second connector 362 includes a second snap-fit ​​portion 3621 and a third snap-fit ​​portion 3622. The second snap-fit ​​portion 3621 and the third snap-fit ​​portion 3622 are spaced apart in a second direction, which is perpendicular to the first direction, and the second snap-fit ​​portion 3621 and the third snap-fit ​​portion 3622 abut against both ends of the extension portion 312 in the second direction. It can be understood that the second snap-fit ​​portion 3621 and the third snap-fit ​​portion 3622 are used to snap the extension portion 312 to fix the second connector 362 to the first sampling member 31. Specifically, the extension portion 312 is interference-fitted into the gap between the second snap-fit ​​portion 3621 and the third snap-fit ​​portion 3622.

[0192] In this embodiment, by engaging the extension with the second and third engaging brackets provided on the second connector, it is beneficial to quickly assemble and disassemble the first sampling component and the second base, thereby improving the assembly and maintenance efficiency of the low-voltage acquisition component.

[0193] In some embodiments, as shown in Figures 3 and 4, the first latching portion 3611 and the second latching portion 3621 are fixed in a first direction, and the third latching portion 3622 and the extension portion 312 are fixed in a first direction at an upper limit. The upper limit fixing in the first direction in this embodiment can be understood as the first latching portion and the second latching portion at least partially abutting against each other in the first direction, thus maintaining a limiting effect on their relative positions in the first direction. The upper limit fixing of the third latching portion and the extension portion in the first direction indicates that the third latching portion and the extension portion abut against each other in the first direction, thus maintaining a limiting effect on their relative positions in the first direction.

[0194] The embodiments of this application achieve limiting in the first direction through the first snap-fit ​​part and the second snap-fit ​​part, and limit in the first direction through the third snap-fit ​​part and the extension part. This can satisfy both the stable relative position of the first sampling member and the second base and the stable relative position of the second base and the second sampling member. The structure is simple and easy to assemble and disassemble.

[0195] In some embodiments, as shown in Figures 3 and 4, the first connector 361 further includes a fourth snap-fit ​​portion 3612, and the second connector 362 further includes a fifth snap-fit ​​portion 3623. The fourth snap-fit ​​portion 3612 and the fifth snap-fit ​​portion 3623 are fixed in a first direction.

[0196] It should be noted that the fourth locking part 3612 and the fifth locking part 3623 being fixed in the first direction means that the first locking part 3611 and the fifth locking part 3623 are at least abutted in the first direction.

[0197] The embodiments of this application improve the stability of the connection between the first connector and the second connector in the first direction by fixing the fourth and fifth snap-fit ​​portions at the upper limit in the first direction.

[0198] In some embodiments, as shown in FIG4, the fourth latching portion 3612 and the first latching portion 3611 are spaced apart in the second direction, and the first connector 361 is also provided with a through clearance hole 3613. The clearance hole 3613 is located between the first latching portion 3611 and the fourth latching portion 3612 in the second direction, and the fourth sampling member 34 passes through the clearance hole 3613.

[0199] It should be noted that "through" means that the clearance hole 3613 is disposed through the first connector 361 at opposite ends in the first direction, so as to reduce the interference of the first connector on the fourth sampling element.

[0200] In this embodiment, by setting a clearance hole between the first latching portion and the fourth latching portion, the fourth sampling member can be accommodated in the gap between the first latching portion and the fourth latching portion. The clearance hole can not only avoid the fourth sampling member, but the first latching portion and the fourth latching portion can also protect the fourth sampling member.

[0201] In some embodiments, as shown in Figures 2 and 3, when multiple battery cells 10 are configured, the second direction is the direction in which the multiple battery cells 10 are arranged. The larger side surfaces of the multiple battery cells can be stacked sequentially, and the direction in which the multiple battery cells are arranged is perpendicular to the extending direction of the larger side surface of the battery cell. Therefore, this second direction can also be understood as the thickness direction of the battery cell.

[0202] In some embodiments, as shown in Figures 2 and 3, the third sampling member 33 extends along the second direction. That is, the third sampling member 33 extends along the arrangement direction of the battery cells 10.

[0203] In this embodiment, by arranging the third sampling element 33 along the second direction, it is beneficial to reduce the acquisition of operating parameters of each battery cell by the third sampling element and improve the stability of data acquisition.

[0204] In this embodiment, the third sampling element 33 is disposed on one end surface of each battery cell 10, typically at one end of the terminal post 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 element and each battery cell 10 to be sampled; the second sampling element 32 is connected to the third sampling element 33, and the second sampling element 32 can be set perpendicular to the third sampling element 33, so that the second sampling element 32 can be easily connected to the sample to be sampled without bending the third sampling element 33 toward each sample to be sampled, thus simplifying the process.

[0205] In some embodiments, as shown in FIG3, a battery cell 10 includes a terminal post 104, a first sampling member 31 is welded to the terminal post 104, and the first sampling member 31 is used for electrically connecting adjacent battery cells 10. By welding the first sampling member to the terminal post, this embodiment of the application can both securely achieve electrical connection between adjacent battery cells and enable voltage sampling of the battery cells. This application also provides an electrical device including a battery according to any of the above embodiments, the battery being used to provide electrical energy.

[0206] In addition to the embodiments of the claims above, specific embodiments involving more specific features or combinations thereof may be preferred and may be as shown in the accompanying drawings.

[0207] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, wherein, include: Box; The battery cell is housed inside the casing; A low-voltage acquisition component is installed inside the housing. The low-voltage acquisition component is used to acquire the operating status parameters of the battery cell, including voltage and temperature. The low-voltage acquisition component includes: A first sampling device is connected to the battery cell to collect the voltage of the battery cell; A second sampling element, one end of which is detachably connected to the first sampling element to transmit the voltage; A third sampling element, which is detachably connected to the other end of the second sampling element to transmit the voltage; A fourth sampling element, connected to the second sampling element, is used to collect the temperature of the battery cell.

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

3. The battery device according to claim 2, wherein, The battery cell includes a casing and an insulating layer. The insulating layer covers the outside of the casing and has at least a partial window to expose the casing, forming a window area. The fourth sampling element is disposed opposite to the window area.

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

5. The battery device according to claim 4, wherein, The battery further includes a heat-conducting element, which is disposed between the second sampling element and the battery cell in the first direction.

6. The battery device according to any one of claims 1-5, wherein, The second sampling component is provided with a fusible structure, which is used to provide fusible protection for the low-voltage acquisition component.

7. The battery device according to claim 6, wherein, The second sampling component is provided with at least two fuse structures, which are used to provide fuse protection for the low-voltage acquisition component.

8. The battery device according to claim 7, wherein, Of the at least two fused structures, one fused structure is connected to the first sampling element and the third sampling element, while the other fused structures are disconnected from the first sampling element and the third sampling element.

9. The battery device according to claim 8, wherein, The low-voltage acquisition component also includes a first base, which is fixed to the third sampling component, and the second sampling component is detachably connected to the first base, so as to realize that the at least two fusible structures respectively provide fusible protection for the low-voltage acquisition component.

10. The battery device according to claim 9, wherein, The first base is provided with multiple limiting cavities, the number of which is the same as the number of the fused structures. The second sampling member is inserted into one of the multiple limiting cavities to achieve connection between one of the fused structures and the first sampling member and the third sampling member.

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

12. The battery device according to claim 11, wherein, The plurality of limiting cavities in the first base are arranged sequentially in a first direction, which is the height direction of the battery cell.

13. The battery device according to claim 12, wherein, The first base includes a body and a partition. The body is hollow and the partition is disposed inside the body to divide the body into two limiting cavities. The contact point is disposed on the inner wall surface of each body near the limiting cavity.

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

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

16. The battery device according to claim 15, wherein, The second sampling element includes a substrate and an insulating film. The insulating film covers the opposite sides of the substrate in the first direction. The two fused structures are respectively disposed between the insulating film and the substrate. The second sampling element has a through hole for conducting the two oppositely disposed fused structures.

17. The battery device according to claim 6, wherein, The fusion structure is set as a resistance fuse.

18. The battery device according to claim 9, wherein, The first base is welded or glued to the third sampling component.

19. The battery device according to any one of claims 1-5, wherein, The low-voltage acquisition component also includes a second base, which is used to detachably fix the second sampling element and the first sampling element.

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

21. The battery device according to claim 20, wherein, The first connector is fixed to the second sampling member. The first sampling member includes a collection part and an extension part. The collection part is used to weld to the battery cell. The extension part is connected to the collection part and is snapped and fixed between the first connector and the second connector.

22. The battery device according to claim 21, wherein, The first connector includes a first snap-fit ​​portion, and the second connector includes a second snap-fit ​​portion and a third snap-fit ​​portion. The second snap-fit ​​portion and the third snap-fit ​​portion are spaced apart in a second direction, which is perpendicular to the first direction. The first direction is the height direction of the battery cell, and the second snap-fit ​​portion and the third snap-fit ​​portion abut against the two ends of the extension portion in the second direction.

23. The battery device according to claim 22, wherein, The first latching portion and the second latching portion are fixed in the first direction, and the third latching portion and the extension portion are fixed in the first direction.

24. The battery device according to claim 23, wherein, The first connector further includes a fourth snap-fit ​​portion, and the second connector further includes a fifth snap-fit ​​portion, wherein the fourth snap-fit ​​portion and the fifth snap-fit ​​portion are fixed at an upper limit in the first direction.

25. The battery device according to claim 24, wherein, The fourth snap-fit ​​portion is spaced apart from the first snap-fit ​​portion in the second direction, and the first connector is also provided with a through clearance hole. The clearance hole is located between the first snap-fit ​​portion and the fourth snap-fit ​​portion in the second direction, and the fourth sampling component passes through the clearance hole.

26. The battery device according to claim 25, wherein, When multiple battery cells are configured, the second direction is the direction in which the multiple battery cells are arranged.

27. The battery device according to claim 26, wherein, The third sampling element extends along the second direction.

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

29. An electrical appliance, wherein, include: The battery device according to any one of claims 1-28 is used to provide electrical energy.

Images