Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises at least one battery monomer assembly, a signal acquisition assembly and a battery monitoring module; the battery monomer assembly comprises a plurality of battery monomers arranged along a first direction; the signal acquisition assembly is used for acquiring information of single batteries of the single battery assembly, the signal acquisition assembly comprises a wire harness group and a first connector, and the first connector is connected to one end of the wire harness group; the battery monitoring module is provided with a second connector, and the second connector is in plugging cooperation with the first connector, thereby reducing the space occupied by the communication connection between the signal collection assembly and the battery monitoring module. The risk of sampling failure caused by interference wear between the first connector and the second connector and the high-voltage box, the confluence component and the inner wall of the box body of the battery device is reduced, and the reliability of the battery device is improved, so that the reliability of the battery device is improved, and the cost of the battery device can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] At present, the battery device is widely used in the fields of electronic equipment, vehicle, electric tool, unmanned aerial vehicle and energy storage equipment. Therefore, higher requirements are put forward for the reliability of the battery device. CONTENT

[0003] The present application provides a battery device and a power utilization device, which can improve the reliability of the battery device.

[0004] In a first aspect, the present application provides a battery device, which comprises at least one battery monomer assembly, a signal acquisition assembly and a battery monitoring module; the battery monomer assembly comprises a plurality of battery monomers arranged along a first direction; the signal acquisition assembly is used for acquiring information of the battery monomers of the battery monomer assembly, and comprises a wire harness group and a first connector, wherein the first connector is connected to one end of the wire harness group; the battery monitoring module is provided with a second connector, and the second connector is plugged and matched with the first connector.

[0005] In the above technical solution, the signal acquisition assembly comprises the first connector, the battery monitoring module is provided with the second connector, and the first connector and the second connector are plugged and matched, so as to realize the communication connection between the signal acquisition assembly and the battery monitoring module. The signal acquisition assembly and the battery monitoring module can be connected without wire harness, the space occupied by the communication connection between the signal acquisition assembly and the battery monitoring module is reduced, the risk of sampling failure caused by the interference and wear of the first connector and the second connector with the high-voltage box, the current collection component and the inner wall of the box of the battery device is reduced, the reliability of sampling is improved, the reliability of the battery device is improved, and the cost of the battery device is reduced. In addition, the plug-in matching mode is simple and reliable, and the assembly difficulty of the battery device can be reduced.

[0006] In some embodiments of the first aspect of the present application, the battery monitoring module and the battery monomer assembly are arranged along the first direction, and along the first direction, the first connector and the second connector are located on the side of the battery monomer assembly facing the battery monitoring module.

[0007] In the above technical solution, by setting the first connector and the second connector on the side of the battery cell assembly facing the battery monitoring module, the connection distance between the first connector and the second connector can be reduced, which facilitates connection, reduces the space occupied by the first connector and the second connector, helps to improve the energy density of the battery device, and also reduces the risk of interference between the first connector and the second connector and other internal structures of the battery device, thereby improving the reliability of the battery device.

[0008] In some embodiments of the first aspect of this application, along the first direction, the second connector is disposed on the side of the battery monitoring module facing the battery cell assembly.

[0009] In the above technical solution, by setting the second connector on the side of the battery monitoring module facing the battery cell assembly, the second connector is closer to the first connector, which facilitates the insertion of the first connector and the second connector. It also makes the internal structure of the battery device more compact, which is beneficial to reduce the size of the battery device and increase the energy density of the battery device.

[0010] In some embodiments of the first aspect of this application, along the first direction, at least a portion of the first connector is located between the battery monitoring module and the battery cell assembly; in a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of the first connector overlaps with at least a portion of the orthographic projection of the battery cell.

[0011] In the above technical solution, by placing at least a portion of the first connector between the battery monitoring module and the battery cell assembly, and on a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of the first connector overlaps with at least a portion of the orthographic projection of the battery cell, the first connector and the battery cell overlap in space. This allows the first connector to make full use of the space between the battery monitoring module and the battery cell assembly, reducing the space occupied by the first connector and the second connector in other directions. This is beneficial for reducing the volume of the battery device and increasing the energy density of the battery device.

[0012] In some embodiments of the first aspect of this application, the insertion directions of the first connector and the second connector are parallel to the first direction.

[0013] In the above technical solution, by setting the insertion direction of the first connector and the second connector to be parallel to the first direction, the space inside the battery device in the first direction can be fully utilized, and the space occupied by the first connector and the second connector in other directions can be reduced, which is beneficial to reducing the size of the battery device in other directions and reducing the volume of the battery device.

[0014] In some embodiments of the first aspect of this application, the battery device includes a housing, the battery cell assembly is housed in the housing, the housing includes a bottom wall, the bottom wall supports the battery cell assembly along a second direction, the second direction intersecting the first direction; along the second direction, a second connector is disposed on the side of the battery monitoring module opposite to the bottom wall.

[0015] In the above technical solution, by setting the second connector on the side of the battery monitoring module away from the bottom wall of the box, it is beneficial to make full use of the space inside the battery device in the second direction, reduce the space occupied by the first connector and the second connector in other directions, and reduce the size of the battery device.

[0016] In some embodiments of the first aspect of this application, the battery cell includes a housing and an electrode assembly, the electrode assembly being housed within the housing, and the housing having a first surface facing away from the bottom wall of the casing along the second direction, the battery monitoring module not extending beyond the first surface along the direction facing away from the bottom wall of the casing.

[0017] In the above technical solution, since the battery monitoring module does not extend beyond the first surface in the direction away from the bottom wall of the box, the space on one side of the first surface in the second direction of the box can be used to accommodate the second connector and the first connector, making full use of the internal space of the battery device and reducing the space occupied by the second connector in other directions, which is conducive to reducing the size of the battery device.

[0018] In some embodiments of the first aspect of this application, the insertion direction of the first connector and the second connector is parallel to the second direction.

[0019] In the above technical solution, by aligning the insertion directions of the first and second connectors parallel to the second direction, the insertion of the first and second connectors is convenient, and the space occupied by the first and second connectors in directions other than the second direction is reduced. When the battery monitoring module does not extend beyond the first surface along the direction away from the bottom wall of the housing, the space on one side of the first surface in the second direction can be used to accommodate the first and second connectors, making full use of the internal space of the battery device and reducing the space occupied by the second and first connectors in other directions, thus helping to reduce the size of the battery device.

[0020] In some embodiments of the first aspect of this application, the battery device includes a housing, the battery cell assembly is housed in the housing, the housing includes a bottom wall, the bottom wall supports the battery cell assembly along a second direction, and the battery monitoring module is disposed on the bottom wall, the second direction intersecting the first direction.

[0021] In the above technical solution, by setting the battery monitoring module on the bottom wall of the box, the battery monitoring module is easy to set up and its stability is improved.

[0022] In some embodiments of the first aspect of this application, the battery monitoring module and the battery cell assembly are arranged along the first direction, the wiring harness includes a main body area and a connection area, the main body area is disposed on the side of the battery cell assembly away from the bottom wall of the box and extends along the first direction, the connection area extends beyond the surface of the battery cell assembly facing the battery monitoring module along the first direction and is connected to the first connector.

[0023] In the above technical solution, by extending the connection area of ​​the wiring harness group beyond the surface of the battery cell assembly facing the battery monitoring module in the first direction and connecting it with the first connector, it is convenient for the first connector and the second connector to be inserted. The main body area of ​​the wiring harness group is located on the side of the battery cell assembly away from the bottom wall of the box, which is convenient for the signal acquisition component to acquire information from the battery cell.

[0024] In some embodiments of the first aspect of this application, the battery device further includes a partition beam disposed within and connected to the housing, the partition beam dividing the internal space of the housing into a first space and a second space arranged along the first direction, the battery monitoring module and the battery cell assembly being disposed in the first space and the second space, respectively.

[0025] In the above technical solution, the internal space of the box is divided into a first space and a second space arranged along the first direction by a partition beam. The battery monitoring module and the battery cell assembly are respectively set in the first space and the second space, which facilitates the setting of the battery monitoring module and the battery cell assembly and reduces the risk of interference between the battery monitoring module and the battery cell assembly.

[0026] In some embodiments of the first aspect of this application, the battery device further includes a locking member configured to lock the battery monitoring module to the bottom wall of the casing.

[0027] In the above technical solution, the battery monitoring module is locked to the bottom wall of the box by a locking component, thereby improving the stability of the battery monitoring module.

[0028] In some embodiments of the first aspect of this application, along the second direction, the battery monitoring module has a second surface facing away from the bottom wall of the box, and the locking member presses against the second surface to lock the battery monitoring module to the bottom wall of the box.

[0029] In the above technical solution, by pressing the locking component against the second surface to lock the battery monitoring module to the bottom wall of the box, it is not necessary to set a connector on the bottom wall of the box to lock the battery monitoring module to the bottom wall of the box, thus reducing the impact on the strength of the box.

[0030] In some embodiments of the first aspect of this application, each of the battery monitoring modules is provided with two locking members, which are arranged at intervals along a third direction, and both the first direction and the second direction intersect the third direction.

[0031] In the above technical solution, the battery monitoring module is locked to the bottom wall of the box by two locking components, which improves the stability of the battery monitoring module and the uniformity of the force on the battery monitoring module.

[0032] In some embodiments of the first aspect of this application, the battery monitoring module includes a first part and a second part. The first part is disposed on the bottom wall of the box. Along the second direction, the surface of the first part facing away from the bottom wall of the box is a second surface. The second part is connected to the second surface and protrudes from the second surface. The second connector is disposed on the second part.

[0033] In the above technical solution, the second part is connected to the second surface and protrudes from the second surface, and the second connector is disposed in the second part, which facilitates the insertion and mating of the second connector and the first connector.

[0034] In some embodiments of the first aspect of this application, along a third direction, the second surface protrudes from both ends of the second portion, and both the first direction and the second direction intersect the third direction.

[0035] In the above technical solution, the second surface protrudes from both ends of the second part along the third direction, which facilitates the locking member to press the second surface. It can also press the second surface on both sides of the second part along the third direction. At least two locking members can jointly lock the battery monitoring module to the bottom wall of the box, thereby improving the stability of the battery monitoring module and the uniformity of the force on the battery monitoring module.

[0036] In some embodiments of the first aspect of this application, the battery device includes a plurality of the signal acquisition components, the plurality of signal acquisition components are arranged along a third direction, the third direction intersecting with the first direction; each battery monitoring module is correspondingly configured with at least one of the signal acquisition components.

[0037] In the above technical solution, by setting multiple signal acquisition components in the battery device, it is possible to synchronously acquire information of the individual battery cells of multiple battery cell modules, so as to obtain the information of the individual battery cells of the battery device in a timely manner.

[0038] In some embodiments of the first aspect of this application, the battery device includes a plurality of battery monitoring modules arranged along a third direction, wherein the first direction and the third direction intersect.

[0039] In the above technical solution, multiple battery monitoring modules are set up through the battery device, which facilitates the connection of the first connector of the signal acquisition component and the second connector of the battery monitoring module at a relatively close distance.

[0040] In some embodiments of the first aspect of this application, at least one of the battery monitoring modules is provided with a plurality of second connectors, each of the second connectors being plugged into and engaged with the first connector of one of the signal acquisition components.

[0041] In the above technical solution, at least one battery monitoring module is equipped with multiple second connectors, and each second connector is plugged into and cooperates with the first connector of a signal acquisition component. This reduces the number of battery monitoring modules in the battery device, which saves costs, reduces the space occupied by the battery monitoring modules, reduces the size of the battery device, and increases the energy density of the battery device.

[0042] In some embodiments of the first aspect of this application, at least one of the battery monitoring modules is provided with a second connector, and the second connector is plugged into and engaged with the first connector of one of the signal acquisition components.

[0043] In the above technical solution, at least one battery monitoring module is provided with a second connector, which is plugged into and cooperates with the first connector of a signal acquisition component to facilitate signal transmission between the signal acquisition component and the battery monitoring module.

[0044] In some embodiments of the first aspect of this application, the at least one battery cell assembly includes a positive electrode delivery section and a negative electrode delivery section; the battery device further includes a housing, a first conductive structure, and a second conductive structure, the battery cell assembly is disposed in the housing, the housing is provided with a positive electrode lead-out section and a negative electrode lead-out section, the positive electrode lead-out section is connected to the positive electrode delivery section through the first conductive structure, the negative electrode lead-out section is connected to the negative electrode delivery section through the second conductive structure, and a clearance gap is formed between two adjacent battery monitoring modules to allow the first conductive structure and the second conductive structure to pass through.

[0045] In the above technical solution, by forming a clearance gap between two adjacent battery monitoring modules to allow the first conductive structure and the second conductive structure to pass through, the risk of interference between the first conductive structure, the second conductive structure and the battery monitoring module is reduced, thereby improving the stability of power transmission and the reliability of the battery device.

[0046] In some embodiments of the first aspect of this application, the first connector is a male connector and the second connector is a female connector, with the first connector inserted into the second connector.

[0047] In the above technical solution, the first connector is a male connector and the second connector is a female connector, thereby enabling the first connector to be inserted into the second connector, which facilitates the electrical connection between the first connector and the second connector.

[0048] In some embodiments of the first aspect of this application, the first connector is crimped to the wire harness assembly.

[0049] In the above technical solution, the first connector is crimped to the wire harness group, making the connection between the first connector and the wire harness group convenient and providing a relatively stable and reliable connection. The crimping connection also makes the connection more environmentally friendly and cost-effective.

[0050] In some embodiments of the first aspect of this application, the first connector is welded to the wire harness assembly.

[0051] In the above technical solution, the connection between the first connector and the wire harness group is welded together, which makes the connection between the first connector and the wire harness group more stable and also makes the overall integrity of the first connector and the wire harness group better, so that it can withstand greater external forces.

[0052] In some embodiments of the first aspect of this application, the first connector is plugged into the wire harness assembly.

[0053] In the above technical solution, the connection between the first connector and the wire harness group is simpler and more convenient by plugging the first connector into the wire harness group.

[0054] In some embodiments of the first aspect of this application, the first connector includes a plug portion and a connecting terminal, the connecting terminal being connected to the wire harness group, and both ends of the plug portion being plugged into the connecting terminal and the second connector, respectively.

[0055] In the above technical solution, the two ends of the plug-in part are respectively plugged into the connecting terminal and the second connector, making the connection between the first connector and the second connector, as well as between the first connector and the wire harness group, more convenient.

[0056] In some embodiments of the first aspect of this application, the wire harness includes an insulating plate and a plurality of wires, a portion of each wire being embedded within the insulating plate and another portion of the wire being exposed outside the insulating plate and connected to the first connector; the signal acquisition assembly includes a plurality of acquisition elements, each acquisition element being connected to at least one of the wires.

[0057] In the above technical solution, by embedding a portion of each wire inside the insulating plate and exposing the other portion of the wire outside the insulating plate and connecting it to the first connector, the risk of information acquisition failure caused by the wires tangling together is reduced. Furthermore, the wires are separated by the insulating plate, reducing the risk of short circuits and improving the reliability of the battery device.

[0058] In some embodiments of the first aspect of this application, the wire harness includes an insulating layer and a plurality of wires, each of the insulating layers covering the periphery of at least one of the wires; the signal acquisition assembly includes a plurality of acquisition elements, the two ends of the wires being connected to the acquisition elements and the first connector, respectively, and each acquisition element being connected to at least one of the wires.

[0059] In the above technical solution, each insulating layer covers the outer periphery of at least one conductor, so that the conductors are separated by the insulating layer, reducing the risk of short circuit and improving the reliability of the battery device.

[0060] In some embodiments of the first aspect of this application, the battery device includes a plurality of battery cell assemblies, the plurality of battery cell assemblies are arranged along a third direction, the first direction and the third direction intersect, and each battery cell assembly is provided with a corresponding signal acquisition component.

[0061] In the above technical solution, the battery device is equipped with multiple battery cell modules, resulting in higher energy density. Each battery cell module is associated with a signal acquisition module, facilitating the collection of information from each individual cell. This allows for accurate and timely acquisition of battery cell information, providing reliable reference data to ensure the reliability of the battery device.

[0062] Secondly, embodiments of this application provide an electrical device, which includes the battery device provided in any embodiment of the first aspect.

[0063] In the above technical solutions, the battery device provided in any embodiment of the first aspect has good reliability, which is beneficial to improving the power reliability of the power-consuming device powered by the battery device. Attached Figure Description

[0064] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0065] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0066] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0067] Figure 3 This is a partial schematic diagram of a battery device provided in some embodiments of this application;

[0068] Figure 4 Exploded views of a single battery cell provided in some embodiments of this application;

[0069] Figure 5 Partial views of a battery device provided for some embodiments of this application;

[0070] Figure 6 A view of a battery device provided in some embodiments of this application along a first direction;

[0071] Figure 7 A third-party view of a battery device provided for some embodiments of this application;

[0072] Figure 8 This is a schematic diagram of the structure of a battery monitoring module provided in some embodiments of this application;

[0073] Figure 9 This is a schematic diagram of the structure of a battery monitoring module provided in some other embodiments of this application;

[0074] Figure 10 This is a partial structural schematic diagram of a battery device provided in other embodiments of this application;

[0075] Figure 11 for Figure 10 Enlarged view at point A1;

[0076] Figure 12 A schematic diagram of a battery device provided in another embodiment of this application along a third direction;

[0077] Figure 13 This is a schematic diagram of the structure of a battery monitoring module provided in some embodiments of this application;

[0078] Figure 14 This is a schematic diagram of the structure of a battery monitoring module provided in some embodiments of this application;

[0079] Figure 15 A schematic diagram of a battery device provided in a third direction for further embodiments of this application;

[0080] Figure 16 This application also provides a view of the battery device along a first direction in some embodiments;

[0081] Figure 17This is a schematic diagram showing the battery monitoring module and locking component after being assembled, as provided in some embodiments of this application;

[0082] Figure 18 This is a schematic diagram of the structure of a battery monitoring module provided in other embodiments of this application;

[0083] Figure 19 Exploded views of a first connector and a second connector provided for some embodiments of this application;

[0084] Figure 20 Exploded views of the first and second connectors provided in some embodiments of this application;

[0085] Figure 21 This is a schematic diagram of the structure of the connection terminals provided in some embodiments of this application;

[0086] Figure 22 This is a schematic diagram of the connection terminals and wire harness assembly after crimping, provided in some embodiments of this application;

[0087] Figure 23 A schematic diagram showing the first connector and the second connector not being plugged in, provided for some embodiments of this application (the first connector and the wire harness assembly are welded together);

[0088] Figure 24 A schematic diagram showing the first connector and the second connector not being plugged in, provided for some embodiments of this application (the first connector and the wire harness assembly being plugged in);

[0089] Figure 25 This is a schematic diagram showing the first connector and the second connector not being plugged in in some other embodiments of this application (the first connector and the wire harness are plugged in);

[0090] Figure 26 This is a schematic diagram of the structure of a wire harness assembly provided in some embodiments of this application;

[0091] Figure 27 This is a schematic diagram of a partial structure of a signal acquisition component provided in some embodiments of this application;

[0092] Figure 28 A schematic diagram showing the first and second connectors not being plugged in, provided for some embodiments of this application;

[0093] Figure 29 This is a schematic diagram showing the first and second connectors after being plugged in, as provided in some other embodiments of this application.

[0094] Icons: 1000 - Vehicle; 100 - Battery Unit; 10 - Housing; 11 - First Housing; 12 - Second Housing; 121 - Bottom Wall; 122 - Side Wall; 20 - Battery Cell Assembly; 21 - Battery Cell; 211 - Housing; 2111 - Shell; 21111 - Opening; 2112 - End Cap; 2113 - First Surface; 212 - Electrode Assembly; 213 - Electrode Terminal; 214 - Current Collector; 22 - Positive Electrode Transport Section; 23 - Negative Electrode Transport Section; 30 - Busbar Component; 40 - Signal Acquisition Assembly; 41 - Wiring Harness; 411 - Main Body Area; 412 - Connection Area; 413 - Insulation Board; 414 - Wire; 415 - Insulation layer; 41a - Columnar structure; 42 - First connector; 421 - Plug-in part; 422 - Connection terminal; 43 - Data acquisition element; 50 - Battery monitoring module; 51 - Second connector; 511 - Plug-in hole; 52 - First end face; 53 - Second end face; 54 - Second surface; 55 - First part; 56 - Second part; 60 - Separator beam; 70 - Locking element; 80 - First conductive structure; 90 - Second conductive structure; 200 - Motor; 300 - Controller; X - First direction; Y - Second direction; Z - Third direction; Q1 - First space; Q2 - Second space; Q3 - Clearance gap. Detailed Implementation

[0095] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0096] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0097] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0098] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0099] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0100] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0101] In this application, "multiple" means two or more (including two).

[0102] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0103] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0104] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0105] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0106] As an 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.

[0107] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, 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. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors 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 material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0108] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials in battery cells may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxide may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.85 Co 0.15 Al0.05 At least one of O2 and its modified compounds.

[0109] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0110] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0111] As an example, the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, 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 electrodes, carbon, nickel, or titanium, etc. Foamed metal can be nickel foam, copper foam, aluminum foam, foam alloy, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0112] As an example, the negative electrode sheet may include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0113] As an 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.

[0114] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. 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 in battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0115] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0116] In some embodiments, the separator is a separator membrane. The separator membrane can be any known porous structure separator membrane with good chemical and mechanical stability.

[0117] As an example, the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.

[0118] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0119] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0120] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0121] In some embodiments, the solvent may include at least one selected from ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more selected from ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0122] Among them, the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.

[0123] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0124] As an example, polymer solid electrolytes can be polyether (polyoxyethylene), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.

[0125] As an example, inorganic solid electrolytes may include one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphate sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0126] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0127] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0128] In some implementations, the electrode assembly is a stacked structure.

[0129] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0130] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0131] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0132] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0133] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0134] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0135] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0136] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0137] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0138] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0139] 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, which is formed by arranging multiple battery cells and fixing them together to form an independent module.

[0140] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0141] In some embodiments, the battery device may be a battery pack, which may include a housing and one or more individual battery cells housed within the housing.

[0142] 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.

[0143] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0144] 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 the individual battery cells. 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.

[0145] 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 the individual battery cells.

[0146] 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.

[0147] 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.

[0148] The battery device includes at least one battery cell assembly, a signal acquisition component, and a battery monitoring module. The signal acquisition component collects information from the individual battery cells in the battery cell assembly and transmits the collected information to the battery monitoring module. In related technologies, to achieve signal transmission between the signal acquisition component and the battery monitoring module, they are connected via a wiring harness. This wiring harness occupies a large amount of internal space in the battery device, reducing its energy density. Furthermore, the wiring harness is prone to interference and wear with the high-voltage box, busbar components, and the inner wall of the enclosure, leading to sampling failures and reduced reliability. Moreover, the overall cost of the adapter wiring harness is too high, increasing the cost of the battery device.

[0149] Based on the above considerations, in order to improve the reliability and energy density of the battery device, this application provides a battery device. The signal acquisition component of the battery device includes a wiring harness and a first connector. The first connector is connected to one end of the wiring harness. The acquisition unit of each signal acquisition component is used to acquire information of a single battery cell in a battery cell assembly. The battery monitoring module of the battery device is provided with a second connector, which is plugged into the first connector.

[0150] The signal acquisition component includes a first connector, and the battery monitoring module has a second connector. The communication connection between the signal acquisition component and the battery monitoring module is achieved through the plug-in mating of the first and second connectors. This eliminates the need for a wiring harness between the two components, reducing the space occupied by the communication connection and lowering the risk of sampling failure due to interference and wear between the first and second connectors and the high-voltage box, busbar components, and the inner wall of the battery housing. This improves the reliability of the battery device and reduces its cost. Furthermore, the plug-in mating method is simple and reliable, reducing the assembly difficulty of the battery device.

[0151] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0152] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0153] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located 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.

[0154] The vehicle 1000 may also include a controller 300 and a motor 200. The controller 300 is used to control the battery device 100 to supply power to the motor 200, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0155] In some embodiments 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.

[0156] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. Figure 3 This is a partial schematic diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 may include a housing 10 and a battery cell assembly 20, the housing 10 being used to house the battery cell assembly 20.

[0157] The housing 10 has an enclosed space inside for accommodating the battery cell assembly 20. The housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, which are interlocked. The first housing 11 and the second housing 12 can have various shapes, such as cuboids or cylinders. The first housing 11 can be a hollow structure open on one side, and the second housing 12 can also be a hollow structure open on one side. The open side of the second housing 12 interlocks with the open side of the first housing 11, thus forming a housing 10 with an enclosed space. Alternatively, the first housing 11 can be a hollow structure open on one side, and the second housing 12 can be a plate-like structure, with the second housing 12 interlocked with the open side of the first housing 11, thus forming a housing 10 with an accommodating space.

[0158] In the battery device 100, the battery device 100 may include a battery cell assembly 20, which includes a plurality of battery cells 21 arranged along a first direction X. The battery device 100 may include one battery cell assembly 20 or multiple battery cell assemblies 20. In the battery device 100, the multiple battery cells 21 may be connected in series, parallel, or in a mixed configuration, where a mixed configuration means that some of the multiple battery cells 21 are connected in series and others in parallel. It is understood that the battery cell assembly 20 may be formed by multiple battery cells 21 connected in series, parallel, or in a mixed configuration. In embodiments where the battery device 100 includes multiple battery cell assemblies 20, the multiple battery cell assemblies 20 may be further connected in series, parallel, or in a mixed configuration to form a whole and housed within the housing 10.

[0159] In some embodiments, the battery device 100 may further include a busbar 30, through which multiple battery cells 21 can be electrically connected within the same battery cell assembly 20, enabling series, parallel, or mixed connections of the multiple battery cells 21. Multiple battery cell assemblies 20 can also be electrically connected through the busbar 30, enabling series, parallel, or mixed connections of the multiple battery cell assemblies 20. The busbar 30 may be a metallic conductor, such as copper, iron, aluminum, stainless steel, or aluminum alloy.

[0160] Please refer to Figure 4 , Figure 4 This is an exploded view of a battery cell 21 provided in some embodiments of this application. The battery cell 21 may include a housing 211 and an electrode assembly 212, the electrode assembly 212 being housed within the housing 211.

[0161] In some embodiments, the housing 211 may include a housing 2111 and an end cap 2112, the housing 2111 having an opening 21111, and the end cap 2112 closing the opening 21111 of the housing 2111. Here, "closed" means to cover or shut, and can be either sealed or unsealed.

[0162] The housing 2111 is a component used to house the electrode assembly 212. The housing 2111 can be a hollow structure with an opening 21111 at one end, or a hollow structure with openings 21111 at both opposite ends. The housing 2111 can have various shapes, such as cylindrical or cuboid. The housing 2111 can be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy. The electrode assembly 212 can be partially or completely housed within the housing 2111.

[0163] End cap 2112 and housing 2111 together define a receiving space for accommodating electrode assembly 212 and other components. End cap 2112 can be connected to housing 2111 by welding, roll sealing, or other methods to close the opening 21111 of housing 2111. The shape of end cap 2112 can be adapted to the shape of housing 2111. For example, if housing 2111 is a cuboid structure, end cap 2112 can be a rectangular plate structure adapted to housing 2111; or if housing 2111 is a cylindrical structure, end cap 2112 can be a circular plate structure adapted to housing 2111. The material of end cap 2112 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The materials of end cap 2112 and housing 2111 can be the same or different.

[0164] In an embodiment where the housing 2111 has an opening 21111 at one end, one end cap 2112 may be provided accordingly. In an embodiment where the housing 2111 has openings 21111 at both opposite ends, two end caps 2112 may be provided accordingly. The two end caps 2112 respectively close the two openings 21111 of the housing 2111, and the two end caps 2112 and the housing 2111 together define the receiving space.

[0165] In some embodiments, the battery cell 21 may further include electrode terminals 213, which are disposed on the housing 211 and are used for electrical connection with the tabs of the electrode assembly 212 to input or output electrical energy of the battery cell 21. The electrode terminals 213 may be disposed on the housing 2111 of the housing 211 or on the end cap 2112 of the housing 211. The electrode terminals 213 and the tabs may be directly connected, for example, by welding the electrode terminals 213 to the tabs. The electrode terminals 213 and the tabs may also be indirectly connected, for example, by connecting the electrode terminals 213 to the tabs via a current collector 214. The current collector 214 may be a metallic conductor, such as copper, iron, aluminum, steel, or aluminum alloy.

[0166] As an example, such as Figure 4 As shown, one end of the housing 2111 forms an opening 21111, and there is one end cap 2112 in the housing 211, which closes one opening 21111 of the housing 2111. Two electrode terminals 213 are provided on the end cap 2112, which are a positive electrode terminal and a negative electrode terminal, respectively. The end of the electrode assembly 212 facing the end cap 2112 has a positive electrode tab and a negative electrode tab. The positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0167] like Figure 3 , Figures 5-7As shown, in some embodiments, the battery device 100 includes a battery cell assembly 20, a signal acquisition component 40, and a battery monitoring module 50; the battery cell assembly 20 includes a plurality of battery cells 21 arranged along a first direction X; the signal acquisition component 40 is used to acquire information of the battery cells 21 of the battery cell assembly 20, and the signal acquisition component 40 includes a wiring harness 41 and a first connector 42, the first connector 42 being connected to one end of the wiring harness 41; the battery monitoring module 50 is provided with a second connector 51, the second connector 51 being plugged into and engaged with the first connector 42.

[0168] The battery device 100 may include one battery cell assembly 20 or multiple battery cell assemblies 20, which are arranged side by side along a certain direction.

[0169] Each battery cell assembly 20 can be equipped with a corresponding signal acquisition component 40, and each signal acquisition component 40 acquires information of the battery cell 21 of the corresponding battery cell assembly 20.

[0170] One signal acquisition component 40 can also correspond to multiple battery cell components 20, so one signal acquisition component 40 can acquire information of the battery cells 21 of the corresponding multiple battery cell components 20.

[0171] The signal acquisition component 40 is used to acquire information from the battery cell 21, such as temperature and voltage information. The signal acquisition component 40 can take many forms, such as FPC (Flexible Printed Circuit Board) or FFC (Flexible Flat Cable).

[0172] In some embodiments, the signal acquisition component 40 further includes a acquisition element 43. The acquisition element 43 includes, but is not limited to, a temperature sensor, a pressure sensor, a voltage sensor, etc. The signal acquisition component 40 may include one or more acquisition elements 43. In some embodiments, the signal acquisition component 40 may include a fuse electrically connected to the busbar component 30.

[0173] One battery cell 21 can correspond to one data acquisition unit 43, or one battery cell 21 can correspond to multiple data acquisition units 43. In the embodiment where each battery cell 21 corresponds to multiple data acquisition units 43, the multiple data acquisition units 43 can be different to collect different information of the battery cell 21. For example, one battery cell 21 can be equipped with two data acquisition units 43, and the two data acquisition units 43 are used to collect the temperature and voltage of the battery cell 21 respectively.

[0174] The battery monitoring module 50, also known as the CMC (Cell monitoring circuit), receives information from the battery cell 21 collected by the signal acquisition component 40 in order to monitor the battery cell 21, such as monitoring the voltage and temperature of the battery cell 21.

[0175] When the first connector 42 and the second connector 51 are inserted and mated, one of the first connector 42 and the second connector 51 has a mating hole 511 for the other to be inserted. The first connector 42 can be inserted into the second connector 51, or the second connector 51 can be inserted into the first connector 42.

[0176] After the first connector 42 and the second connector 51 are connected, a communication connection is established between the information acquisition component and the battery monitoring module 50, and the information of the battery cell 21 collected by the information acquisition component can be transmitted to the battery monitoring module 50.

[0177] The signal acquisition component 40 includes a first connector 42, and the battery monitoring module 50 is provided with a second connector 51. The communication connection between the signal acquisition component 40 and the battery monitoring module 50 is achieved through the plug-in mating of the first connector 42 and the second connector 51. This eliminates the need for a wiring harness between the signal acquisition component 40 and the battery monitoring module 50, reducing the space occupied by the communication connection. It also reduces the risk of sampling failure due to interference and wear between the first connector 42 and the second connector 51 and the high-voltage box, the busbar component 30, and the inner wall of the battery device 100 housing 10, thus improving the reliability of the battery device 100 and reducing its cost. Furthermore, the plug-in mating method is simple and reliable, reducing the assembly difficulty of the battery device 100.

[0178] like Figures 5-7 As shown, in some embodiments, the battery monitoring module 50 and the battery cell assembly 20 are arranged along a first direction X, and along the first direction X, the first connector 42 and the second connector 51 are located on the side of the battery cell assembly 20 facing the battery monitoring module 50.

[0179] Along the first direction X, the first connector 42 and the second connector 51 can be located between the battery monitoring module 50 and the battery cell assembly 20. Alternatively, along the first direction X, the first connector 42 and the second connector 51 can be located on the side of the battery monitoring module 50 opposite to the battery cell assembly 20.

[0180] By placing the first connector 42 and the second connector 51 on the side of the battery cell assembly 20 facing the battery monitoring module 50, the connection distance between the first connector 42 and the second connector 51 can be reduced, facilitating connection, reducing the space occupied by the first connector 42 and the second connector 51, which is beneficial to improving the energy density of the battery device 100. It can also reduce the risk of interference between the first connector 42 and the second connector 51 and other internal structures of the battery device 100, thereby improving the reliability of the battery device 100.

[0181] like Figures 5-8 As shown, in some embodiments, along the first direction X, the second connector 51 is disposed on the side of the battery monitoring module 50 facing the battery cell assembly 20.

[0182] The second connector 51 is located on the side of the battery monitoring module 50 facing the battery cell assembly 20. The insertion direction of the first connector 42 and the second connector 51 can be parallel to the first direction X. This insertion method makes the first connector 42 and the second connector 51 form a vertical structure after insertion.

[0183] like Figure 7 , Figure 8 As shown, the battery monitoring module 50 has a plate-like structure. The first direction X is parallel to the thickness direction of the battery monitoring module 50. The insertion direction of the first connector 42 and the second connector 51 is parallel to the thickness direction of the battery monitoring module 50. After the first connector 42 and the second connector 51 are inserted, a vertical structure is formed.

[0184] In an embodiment where the second connector 51 has a insertion hole 511 for the first connector 42 to be inserted, the entrance of the insertion hole 511 for the first connector 42 to be inserted faces the battery cell assembly 20, and the insertion direction of the first connector 42 and the second connector 51 can be parallel to the first direction X.

[0185] Along the first direction X, the second connector 51 has a first end face 52 facing the battery cell assembly 20.

[0186] like Figure 7 , Figure 8 As shown, the second connector 51 can protrude from the first end face 52. The second connector 51 extends from the first end face 52 toward the direction close to the battery cell assembly 20, and the insertion hole 511 is recessed from the end of the second connector 51 away from the first end face 52 toward the direction close to the first end face 52.

[0187] like Figure 9 As shown, the insertion hole 511 of the second connector 51 can be disposed on the first end face 52, that is, the insertion hole 511 is recessed from the first end face 52 in the direction away from the battery cell assembly 20.

[0188] In an embodiment where the first connector 42 has a insertion hole 511 for the second connector 51 to be inserted, the second connector 51 may protrude from the first end face 52 and extend toward the battery cell assembly 20, and the insertion direction of the first connector 42 and the second connector 51 may be parallel to the first direction X.

[0189] By placing the second connector 51 on the side of the battery monitoring module 50 facing the battery cell assembly 20, the second connector 51 is closer to the first connector 42, which facilitates the insertion of the first connector 42 and the second connector. This also makes the internal structure of the battery device 100 more compact, which is beneficial for reducing the volume of the battery device 100 and increasing the energy density of the battery device 100.

[0190] like Figure 7 As shown, in some embodiments, at least a portion of the first connector 42 is located between the battery monitoring module 50 and the battery cell assembly 20 along the first direction X; in a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of the first connector 42 overlaps with at least a portion of the orthographic projection of the battery cell 21.

[0191] The first connector 42 may be located partially between the battery monitoring module 50 and the battery cell assembly 20, or it may be located entirely between the battery monitoring module 50 and the battery cell assembly 20. Figure 7 The diagram shows the first connector 42 positioned entirely between the battery monitoring module 50 and the battery cell assembly 20.

[0192] Along the second direction Y, the first connector 42 may be partially located between the battery monitoring module 50 and the battery cell assembly 20, or the first connector 42 may be located entirely between the battery monitoring module 50 and the battery cell assembly 20.

[0193] Along the third direction Z, the first connector 42 may be partially located between the battery monitoring module 50 and the battery cell assembly 20, or the first connector 42 may be located entirely between the battery monitoring module 50 and the battery cell assembly 20.

[0194] Among them, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0195] By positioning at least a portion of the first connector 42 between the battery monitoring module 50 and the battery cell assembly 20, and ensuring that at least a portion of the orthographic projection of the first connector 42 overlaps with at least a portion of the orthographic projection of the battery cell 21 in a projection plane perpendicular to the first direction X, the first connector 42 and the battery cell 21 overlap spatially. This allows the first connector 42 to fully utilize the space between the battery monitoring module 50 and the battery cell assembly 20, reducing the space occupied by the first connector 42 and the second connector 51 in other directions. This is beneficial for reducing the volume of the battery device 100 and increasing the energy density of the battery device 100.

[0196] like Figures 5-7 As shown, in some embodiments, the insertion direction of the first connector 42 and the second connector 51 is parallel to the first direction X.

[0197] The first connector 42 and the second connector 51 are then inserted to form a vertical structure.

[0198] By setting the insertion direction of the first connector 42 and the second connector 51 to be parallel to the first direction X, the space inside the battery device 100 in the first direction X can be fully utilized, and the space occupied by the first connector 42 and the second connector 51 in other directions can be reduced, which is beneficial to reducing the size of the battery device 100 in other directions and reducing the volume of the battery device 100.

[0199] like Figures 10-12 As shown, in some embodiments, the battery device 100 includes a housing 10, a battery cell assembly 20 is housed in the housing 10, the housing 10 includes a bottom wall 121, the bottom wall 121 supports the battery cell assembly 20 along a second direction Y, the second direction Y intersects with the first direction X; along the second direction Y, a second connector 51 is disposed on the side of the battery monitoring module 50 away from the bottom wall 121.

[0200] The bottom wall 121 is the base plate of the housing 10, and it bears the weight of the battery cell assembly 20. The second direction Y can be the direction of gravity, and it is perpendicular to the first direction X.

[0201] The second connector 51 is located on the side of the battery monitoring module 50 facing away from the bottom wall 121 in the second direction Y. Then the insertion direction of the first connector 42 and the second connector 51 can intersect with the first direction X. This insertion method makes the first connector 42 and the second connector 51 form a horizontal structure after insertion.

[0202] like Figures 10-11As shown, the battery monitoring module 50 has a plate-like structure. The first direction X is parallel to the thickness direction of the battery monitoring module 50. The insertion direction of the first connector 42 and the second connector 51 is perpendicular to the thickness direction of the battery monitoring module 50. After the first connector 42 and the second connector 51 are inserted, they form a horizontal structure.

[0203] In an embodiment where the second connector 51 has a insertion hole 511 for the first connector 42 to be inserted, the entrance of the insertion hole 511 for the first connector 42 to be inserted faces the side away from the bottom wall 121 of the box, and the insertion direction of the first connector 42 and the second connector 51 can be parallel to the second direction Y.

[0204] Along the second direction Y, the second connector 51 has a second end face 53 that is furthest from the bottom wall 121 of the housing.

[0205] like Figure 13 As shown, the second connector 51 can protrude from the second end face 53. The second connector 51 extends from the second end face 53 in a direction away from the bottom wall 121 of the box, and the insertion hole 511 is recessed from the end of the second connector 51 away from the second end face 53 in a direction close to the bottom wall 121 of the box.

[0206] like Figure 14 As shown, the insertion hole 511 can be provided on the second end face 53, that is, the insertion hole 511 is recessed from the second end face 53 toward the bottom wall 121 of the box.

[0207] In an embodiment where the first connector 42 has a insertion hole 511 for the second connector 51 to be inserted, the second connector 51 may protrude from the first end face 52 and extend in a direction away from the bottom wall 121 of the box, and the insertion direction of the first connector 42 and the second connector 51 may be parallel to the second direction Y.

[0208] By placing the second connector 51 on the side of the battery monitoring module 50 away from the bottom wall 121, it is beneficial to make full use of the space inside the battery device 100 in the second direction Y, reduce the space occupied by the first connector 42 and the second connector 51 in other directions, and reduce the volume of the battery device 100.

[0209] like Figure 15 As shown, in some embodiments, the battery cell 21 includes a housing 211 and an electrode assembly 212, the electrode assembly 212 being housed within the housing 211. Along the second direction Y, the housing 211 has a first surface 2113 facing away from the bottom wall 121 of the casing, and the battery monitoring module 50 does not extend beyond the first surface 2113 in the direction facing away from the bottom wall 121 of the casing.

[0210] The first surface 2113 can be the outer surface of the end cap 2112 or a part of the outer surface of the housing 2111. For example, in an embodiment where the battery cell 21 is upright and the electrode terminals 213 of the battery cell 21 are disposed on the end cap 2112 and protrude from the surface of the end cap 2112 in a direction away from the bottom wall 121, the first surface 2113 is the outer surface of the end cap 2112. As another example, in an embodiment where the battery cell 21 is inverted and the electrode terminals 213 of the battery cell 21 are disposed on the end cap 2112 and protrude from the surface of the end cap 2112 in a direction facing the bottom wall 121, the first surface 2113 is the outer surface of the wall portion of the housing 2111 opposite to the end cap 2112.

[0211] Along the second direction Y, the end of the battery monitoring module 50 furthest from the bottom wall 121 can be flush with the first surface 2113, or, along the second direction Y, the surface of the battery monitoring module 50 furthest from the bottom wall 121 is closer to the bottom wall 121 than the first surface 2113. Figure 15 The diagram shows the case where the surface of the battery monitoring module 50 furthest from the bottom wall 121 is closer to the bottom wall 121 than the first surface 2113. Specifically, along the second direction Y, the surface of the battery monitoring module 50 furthest from the bottom wall 121 can be either the second end face 53 or a surface of the second connector 51.

[0212] Since the battery monitoring module 50 does not extend beyond the first surface 2113 in the direction away from the bottom wall 121 of the box, the space on one side of the first surface 2113 in the second direction Y of the box 10 can accommodate the second connector 51 and the first connector 42, making full use of the internal space of the battery device 100 and reducing the space occupied by the second connector 51 in other directions, which is conducive to reducing the volume of the battery device 100.

[0213] like Figure 11 , Figure 12 , Figure 15 As shown, in some embodiments, the insertion direction of the first connector 42 and the second connector 51 is parallel to the second direction Y.

[0214] The first connector 42 and the second connector 51 are then inserted to form a horizontal structure.

[0215] By aligning the insertion directions of the first connector 42 and the second connector 51 parallel to the second direction Y, the insertion of the first connector 42 and the second connector 51 is convenient, and the space occupied by the first connector 42 and the second connector 51 in directions other than the second direction Y is reduced. When the battery monitoring module 50 does not extend beyond the first surface 2113 along the direction away from the bottom wall 121 of the housing, the space on one side of the first surface 2113 in the second direction Y of the housing 10 can be used to accommodate the first connector 42 and the second connector 51. This fully utilizes the internal space of the battery device 100, reduces the space occupied by the second connector 51 and the first connector 42 in other directions, and helps to reduce the volume of the battery device 100.

[0216] like Figure 15 As shown, in some embodiments, the battery device 100 includes a housing 10, a battery cell assembly 20 is housed in the housing 10, the housing 10 includes a bottom wall 121, the bottom wall 121 supports the battery cell assembly 20 along a second direction Y, and a battery monitoring module 50 is disposed on the bottom wall 121, the second direction Y intersects with the first direction X.

[0217] The battery monitoring module 50 may be in contact with the bottom wall 121 of the box without any other connection. Understandably, the bottom wall 121 of the box supports the battery monitoring module 50 to prevent the battery monitoring module 50 from hanging and causing unstable connection between the first connector 42 and the second connector 51.

[0218] The battery monitoring module 50 can be connected to the bottom wall 121 of the box using a certain connection process, such as adhesive connection, welding connection, bolt connection, etc.

[0219] By placing the battery monitoring module 50 on the bottom wall 121 of the box, the installation of the battery monitoring module 50 is facilitated and the stability of the battery monitoring module 50 is improved.

[0220] like Figure 15 As shown, in some embodiments, the battery monitoring module 50 and the battery cell assembly 20 are arranged along the first direction X. The wiring harness group 41 includes a main body area 411 and a connecting area 412. The main body area 411 is located on the side of the battery cell assembly 20 away from the bottom wall 121 of the box and extends along the first direction X. The main body area 411 connects the acquisition element 43 and the connecting area 412. The connecting area 412 extends beyond the surface of the battery cell assembly 20 facing the battery monitoring module 50 along the first direction X and is connected to the first connector 42.

[0221] In an embodiment where the battery cell 21 is upright and the electrode terminal 213 of the battery cell 21 is located on the outer surface of the protruding end cap 2112 away from the bottom wall 121 of the casing, the main body area 411 may be located on the side of the electrode terminal 213 away from the bottom wall 121 of the casing. In the projection plane perpendicular to the second direction Y, the orthographic projection of the main body area 411 and the orthographic projection of the electrode terminal 213 at least partially overlap.

[0222] In an embodiment where the battery cell 21 is upright and the electrode terminals 213 of the battery cell 21 are along the outer surface of the protruding end cap 2112 away from the bottom wall 121 of the case, the main body area 411 can be arranged to avoid the electrode terminals 213. In the projection plane perpendicular to the second direction Y, the orthographic projection of the main body area 411 and the orthographic projection of the electrode terminals 213 do not overlap.

[0223] The connection area 412 extends beyond the battery cell assembly 20 along the first direction X. In the projection plane perpendicular to the second direction Y, the orthographic projection of the connection area 412 and the orthographic projection of the battery cell assembly 20 do not overlap.

[0224] In some embodiments, the connection area 412 may be located at least partially between the battery monitoring module 50 and the battery cell assembly 20.

[0225] In other embodiments, along the second direction Y, the connection region 412 may be at least partially located outside the battery monitoring module 50 and the battery cell assembly 20.

[0226] The connection area 412 can extend along the first direction X so that the first connector 42 and the second connector 51 can be inserted along the first direction X.

[0227] The connecting area 412 can also be bent relative to the main body area 411 so that the connecting area 412 can be adjusted to a shape that facilitates the insertion of the first connector 42 and the second connector 51.

[0228] For example, such as Figure 7 As shown, in an embodiment where the second connector 51 is located on the side of the battery monitoring module 50 facing the battery cell assembly 20, the connection area 412 can be bent for the first time around the edge of the outer shell 211 of the battery cell 21 closest to the battery monitoring module 50 toward the bottom wall 121 of the box, and then bent for the second time at another position in the extension direction of the connection area 412, so that a portion of the connection area 412 is closer to the bottom wall 121 of the box relative to the first surface 2113, and in the projection plane perpendicular to the first direction X, the orthographic projection of the connection area 412 and the orthographic projection of the battery cell 21 overlap, so that the connection area 412 is at least partially located between the battery cell assembly 20 and the battery monitoring module 50, making full use of the space inside the box 10.

[0229] For example, such as Figure 15As shown, in an embodiment where the second connector 51 is located on the side of the battery monitoring module 50 away from the bottom wall 121 along the second direction Y, the connection area 412 can be bent for the first time away from the bottom wall 121 around the connection position with the main body area 411, and then bent for the second time at another position in the extension direction of the connection area 412, so that the first connector 42 and the second connector 51 can be inserted along the second direction Y.

[0230] By connecting the main body area 411 of the wiring harness 41 to the acquisition unit 43 and the connection area 412, the connection area 412 extends beyond the surface of the battery cell assembly 20 facing the battery monitoring module 50 along the first direction X and is connected to the first connector 42, which facilitates the insertion of the first connector 42 and the second connector 51, and facilitates the acquisition unit 43 to acquire information from the battery cell 21.

[0231] like Figure 15 As shown, in some embodiments, the battery device 100 further includes a partition beam 60, which is disposed inside the housing 10 and connected to the housing 10. The partition beam 60 divides the internal space of the housing 10 into a first space Q1 and a second space Q2 arranged along the first direction X. The battery monitoring module 50 and the battery cell assembly 20 are respectively disposed in the first space Q1 and the second space Q2.

[0232] The box body 10 also includes a box side wall 122, which surrounds the outer periphery of the box bottom wall 121. Along the second direction Y, one end of the box side wall 122 is connected to the box bottom wall 121, and the other end of the box side wall 122 forms an opening.

[0233] The partition beam 60 can be connected to the bottom wall 121 of the box, for example, by means of bonding, welding, bolting or other methods.

[0234] The partition beam 60 can also be connected to the box side wall 122. For example, both ends of the partition beam 60 along the third direction Z are connected to the box side wall 122. The partition beam 60 is connected to the box side wall 122 by means of bonding, welding, bolting, etc.

[0235] The partition beam 60 can be connected to both the bottom wall 121 and the side wall 122 of the box.

[0236] Of course, the partition beam 60 and the box body 10 can also be a one-piece molded structure.

[0237] The internal space of the housing 10 is divided into a first space Q1 and a second space Q2 arranged along the first direction X by the partition beam 60. The battery monitoring module 50 and the battery cell assembly 20 are respectively set in the first space Q1 and the second space Q2, which facilitates the setting of the battery monitoring module 50 and the battery cell assembly 20 and reduces the risk of interference between the battery monitoring module 50 and the battery cell assembly 20.

[0238] like Figure 16 , Figure 17 As shown, in some embodiments, the battery device 100 further includes a locking member 70 configured to lock the battery monitoring module 50 to the bottom wall 121 of the casing.

[0239] The locking component 70 can be used to lock the battery monitoring module 50 to the bottom wall 121 of the case by connecting the battery monitoring module 50 and the bottom wall 121. The locking component 70 can be adhesive, bolt, screw, etc.

[0240] The locking component 70 can press the battery monitoring module 50 against the bottom wall 121 of the box, thereby locking the battery monitoring module 50 against the bottom wall 121 of the box.

[0241] The battery monitoring module 50 is locked to the bottom wall 121 of the box by the locking component 70, which improves the stability of the battery monitoring module 50.

[0242] like Figure 16 , Figure 17 As shown, in some embodiments, along the second direction Y, the battery monitoring module 50 has a second surface 54 facing away from the bottom wall 121 of the case, and the locking member 70 is pressed against the second surface 54 to lock the battery monitoring module 50 to the bottom wall 121 of the case.

[0243] The second surface 54 can be the surface of the battery monitoring module 50 furthest from the bottom wall 121 along the second direction Y, or it can be another surface of the battery monitoring module 50 opposite to the bottom wall 121 along the second direction Y.

[0244] The locking member 70 can have various structural forms. For example, the locking member 70 is a long bolt, one end of which presses against the second surface 54. The locking member 70 can be threaded to the housing 10 or to other structures inside the housing 10. The locking member 70 is a long bolt, which can both press the battery monitoring module 50 and adjust the degree of pressing the battery monitoring module 50.

[0245] By pressing the locking member 70 against the second surface 54 to lock the battery monitoring module 50 to the bottom wall 121 of the box, it is not necessary to set a connector on the bottom wall 121 of the box to lock the battery monitoring module 50 to the bottom wall 121 of the box, thus reducing the impact on the strength of the box body 10.

[0246] A battery monitoring module 50 can be equipped with one locking member 70 or multiple locking members 70. These multiple locking members 70 work together to press the battery monitoring module 50 firmly against the bottom wall 121 of the enclosure, thus improving the stability of the battery monitoring module 50. For example, each battery monitoring module 50 is equipped with two locking members 70, which are spaced apart along a third direction Z. Both the first direction X and the second direction Y intersect with the third direction Z.

[0247] In this embodiment, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0248] The battery monitoring module 50 is locked to the bottom wall 121 of the box by two locking parts 70, which improves the stability of the battery monitoring module 50 and the uniformity of the force on the battery monitoring module 50.

[0249] like Figure 17 As shown, in some embodiments, the battery monitoring module 50 includes a first part 55 and a second part 56. The first part 55 is disposed on the bottom wall 121 of the box. Along the second direction Y, the surface of the first part 55 facing away from the bottom wall 121 of the box is the second surface 54. The second part 56 is connected to the second surface 54 and protrudes from the second surface 54. The second connector 51 is disposed on the second part 56.

[0250] The first part 55 and the second part 56 can be set separately and then connected into one unit to form the battery monitoring module 50. The first part 55 and the second part 56 can be bonded or welded together.

[0251] Part 55 and Part 56 can also be molded as a single piece.

[0252] The second connector 51 can be located on the side of the second part 56 facing the battery cell assembly 20 along the first direction X, or it can be located on the side of the second part 56 away from the bottom wall 121 along the second direction Y.

[0253] The second connector 51 is disposed on the second part 56, and the locking member 70 presses against the second surface 54 to reduce the risk of interference between the second connector 51 and the first connector 42 after they are inserted.

[0254] The second connector 51 is disposed on the second part 56, which is connected to and protrudes from the second surface 54, so as to facilitate the insertion and mating of the second connector 51 and the first connector 42.

[0255] At least a portion of the second surface 54 protrudes from the outer peripheral surface of the second portion 56; that is, the second surface 54 can protrude from any area of ​​the outer peripheral surface of the second portion 56. A portion of the edge of the second surface 54 can be flush with the outer peripheral surface of the second portion 56, while a portion of the second surface 54 protrudes from the outer peripheral surface of the second portion 56. The portion of the second surface 54 protruding from the second portion 56 can press against the locking member 70 to press the battery monitoring module 50 firmly against the bottom wall 121 of the casing.

[0256] Exemplarily, in some embodiments, along the third direction Z, the second surface 54 protrudes from both ends of the second portion 56, and both the first direction X and the second direction Y intersect the third direction Z. The portions of the second surface 54 protruding from both ends of the second portion 56 along the third direction Z can respectively abut against the locking member 70 to press the battery monitoring module 50 against the bottom wall 121 of the casing.

[0257] The second surface 54 protrudes from both ends of the second part 56 along the third direction Z, which facilitates the locking member 70 to press the second surface 54. It can also press the second surface 54 on both sides of the second part 56 along the third direction Z. At least two locking members 70 can jointly lock the battery monitoring module 50 to the bottom wall 121 of the box, thereby improving the stability of the battery monitoring module 50 and the uniformity of the force on the battery monitoring module 50.

[0258] In other embodiments, along the third direction Z, one end of the second surface 54 may be flush with one end of the second portion 56, and the second surface 54 protrudes from the other end of the second portion 56.

[0259] In some embodiments, along the first direction X, the two ends of the second surface 54 are flush with the two ends of the second portion 56.

[0260] like Figure 16 As shown, in some embodiments, the battery device 100 includes a plurality of signal acquisition components 40, which are arranged along a third direction Z, and the third direction Z intersects with the first direction X; each battery monitoring module 50 is correspondingly configured with at least one signal acquisition component 40.

[0261] Multiple signal acquisition components 40 can be arranged side-by-side along a third direction Z. Each battery monitoring module 50 can be provided with one second connector 51, or multiple second connectors 51 can be provided. In an embodiment where the battery monitoring module 50 is provided with multiple second connectors 51, one battery monitoring module 50 can be plugged into and cooperate with the first connectors 42 of the multiple signal acquisition components 40, thereby communicating with the multiple information acquisition components.

[0262] By setting multiple signal acquisition components 40 in the battery device 100, it is possible to synchronously acquire information of the battery cells 21 of multiple battery cell components 20, so as to obtain information of the battery cells 21 of the battery device 100 in a timely manner.

[0263] like Figure 16 As shown, in some embodiments, the battery device 100 includes a plurality of battery monitoring modules 50, which are arranged along a third direction Z, where the first direction X and the third direction Z intersect.

[0264] The arrangement direction of the multiple battery monitoring modules 50 can be the same as the arrangement direction of the multiple signal acquisition components 40. The number of second connectors 51 provided in each of the multiple battery monitoring modules 50 can be the same or different. In this embodiment, some of the multiple battery monitoring modules 50 are provided with one second connector 51, while other parts of the multiple battery monitoring modules 50 are provided with multiple second connectors 51.

[0265] By setting multiple battery monitoring modules 50 in the battery device 100, it is convenient to connect the first connector 42 of the signal acquisition component 40 and the second connector 51 of the battery monitoring module 50 at a closer distance.

[0266] like Figure 16 , Figure 18 As shown, in some embodiments, at least one battery monitoring module 50 is provided with a plurality of second connectors 51, each second connector 51 being plugged into and engaged with a first connector 42 of a signal acquisition component 40.

[0267] A portion of the multiple battery monitoring modules 50 may be provided with a second connector 51, and another portion of the multiple battery monitoring modules 50 may be provided with multiple second connectors 51.

[0268] Of course, all battery monitoring modules 50 can be equipped with multiple second connectors 51.

[0269] The battery monitoring module 50, which is equipped with multiple second connectors 51, can be plugged into and cooperate with the first connectors 42 of multiple information acquisition components, thereby realizing the communication connection between one battery monitoring module 50 and multiple information acquisition components.

[0270] By providing multiple second connectors 51 with at least one battery monitoring module 50, each second connector 51 is plugged into and cooperates with the first connector 42 of a signal acquisition component 40, thereby reducing the number of battery monitoring modules 50 in the battery device 100, which can save costs, reduce the space occupied by the battery monitoring modules 50, reduce the volume of the battery device 100, and increase the energy density of the battery device 100.

[0271] likeFigure 16 As shown, in some embodiments, at least one battery monitoring module 50 is provided with a second connector 51, which is plugged into and engaged with a first connector 42 of a signal acquisition component 40.

[0272] A portion of the multiple battery monitoring modules 50 may be provided with a second connector 51, and another portion of the multiple battery monitoring modules 50 may be provided with multiple second connectors 51.

[0273] Of course, all battery monitoring modules 50 can be equipped with a second connector 51.

[0274] At least one battery monitoring module 50 is provided with a second connector 51, which is plugged into and cooperates with the first connector 42 of a signal acquisition component 40 to facilitate signal transmission between the signal acquisition component 40 and the battery monitoring module 50.

[0275] like Figure 16 As shown, in an embodiment where the battery device 100 includes a plurality of battery monitoring modules 50, some of the battery monitoring modules 50 are provided with a second connector 51, and other battery monitoring modules 50 are provided with a plurality of second connectors 51.

[0276] like Figure 16 As shown, in some embodiments, at least one battery cell assembly 20 includes a positive electrode delivery section 22 and a negative electrode delivery section 23; the battery device 100 also includes a housing 10, a first conductive structure 80 and a second conductive structure 90. The battery cell assembly 20 is disposed inside the housing 10. The housing 10 is provided with a positive electrode lead-out section and a negative electrode lead-out section. The positive electrode lead-out section is connected to the positive electrode delivery section 22 through the first conductive structure 80, and the negative electrode lead-out section is connected to the negative electrode delivery section 23 through the second conductive structure 90. A clearance gap Q3 is formed between two adjacent battery monitoring modules 50 to allow the first conductive structure 80 and the second conductive structure 90 to pass through.

[0277] All battery cells 20 are connected in series, parallel or mixed to form a battery module. The positive and negative output sections are two electrodes with opposite polarities in the battery module.

[0278] The positive electrode and the negative electrode are the electrodes that electrically connect the battery device 100 to external devices to enable the charging and discharging of the battery device 100.

[0279] The first conductive structure 80 and the second conductive structure 90 can be wires 414, metal plates, etc.

[0280] The clearance Q3 formed between two adjacent battery monitoring modules 50 can be defined by the second part 56 of the two adjacent battery monitoring modules 50, or it can be defined by the first part 55 and the second part 56 of the two adjacent battery monitoring modules 50.

[0281] By forming a clearance gap Q3 between two adjacent battery monitoring modules 50, allowing the first conductive structure 80 and the second conductive structure 90 to pass through, the risk of interference between the first conductive structure 80 and the second conductive structure 90 and the battery monitoring module 50 is reduced, thereby improving the stability of power transmission and the reliability of the battery device 100.

[0282] like Figure 17 , Figure 18 As shown, in some embodiments, the first connector 42 is a male connector and the second connector 51 is a female connector, with the first connector 42 inserted into the second connector 51.

[0283] The female connector provides a socket for the male connector to be inserted, that is, the first connector 42 is inserted into the socket of the second connector 51.

[0284] By using the first connector 42 as a male connector and the second connector 51 as a female connector, the first connector 42 can be inserted into the second connector 51, facilitating the electrical connection between the first connector 42 and the second connector 51.

[0285] Of course, in other embodiments, the second connector 51 can be a male connector and the first connector 42 can be a female connector, with the second connector 51 inserted into the first connector 42.

[0286] There are various connection methods between the first connector 42 and the wire harness group 41, such as... Figures 19-21 As shown, in some embodiments, the first connector 42 is crimped to the wire harness group 41.

[0287] The wire harness assembly 41 includes an insulating plate 413 and a wire 414, with part of the wire 414 embedded in the insulating plate 413 and the other part of the wire 414 exposed outside the insulating plate 413.

[0288] like Figure 20 , Figure 21 As shown, the first connector 42 includes a plug portion 421 and a connection terminal 422. The plug portion 421 and the connection terminal 422 are connected. The plug portion 421 is used to plug into and cooperate with the second connector 51.

[0289] like Figure 22 As shown, after the connecting terminal 422 pierces the insulating plate 413, the connecting terminal 422 is bent by external force so that the connecting terminal 422 surrounds the wire 414 exposed outside the insulating plate 413, thereby realizing the crimping of the first connector 42 and the wire harness group 41.

[0290] Each first connector 42 may include one connection terminal 422 or multiple connection terminals 422. In embodiments where the first connector 42 includes multiple connection terminals 422, the wire harness group 41 may include multiple wires 414, and each connection terminal 422 may wrap around one wire 414 or multiple wires 414.

[0291] In this embodiment, the connecting terminal 422 includes, but is not limited to, the piercing terminal.

[0292] The crimp connection between the first connector 42 and the wire harness group 41 facilitates the connection and provides a stable and reliable connection. Furthermore, the crimp connection between the first connector 42 and the wire harness group 41 is more environmentally friendly and reduces costs.

[0293] like Figure 23 As shown, in some other embodiments, the first connector 42 is welded to the wire harness group 41.

[0294] The connecting terminals 422 and wires 414 of the first connector 42 exposed outside the insulating plate 413 are welded together. The welding method can be laser welding, ultrasonic welding, etc.

[0295] The connection between the first connector 42 and the wire harness group 41 is welded together, which makes the connection between the first connector 42 and the wire harness group 41 more stable and also makes the overall integrity of the first connector 42 and the wire harness group 41 better, so that it can withstand greater external forces.

[0296] In other embodiments, such as Figure 24 As shown, the first connector 42 is inserted into the wire harness group 41.

[0297] One end of the first connector 42 is inserted into the second connector 51, and the other end of the first connector 42 is inserted into the wire harness group 41.

[0298] The connection between the first connector 42 and the wire harness group 41 is simpler and more convenient through the insertion and engagement of the first connector 42 and the wire harness group 41.

[0299] The plug-in part 421 and the connection terminal 422 can be either detachable or fixed.

[0300] like Figure 24 , Figure 25 As shown, in some embodiments, the first connector 42 includes a plug portion 421 and a connecting terminal 422. The connecting terminal 422 is connected to the wire harness group 41, and the two ends of the plug portion 421 are respectively plugged into the connecting terminal 422 and the second connector 51.

[0301] In this embodiment, one end of the plug portion 421 is inserted into the socket of the second connector 51, and the other end of the plug portion 421 forms a socket for the connection terminal 422 to be inserted.

[0302] By having the two ends of the plug-in portion 421 plug into the connection terminal 422 and the second connector 51 respectively, the connection between the first connector 42 and the second connector 51, as well as between the first connector 42 and the wire harness group 41, becomes more convenient.

[0303] like Figure 26 As shown, in some embodiments, the wire harness 41 includes an insulating plate 413 and a plurality of wires 414, a portion of which is embedded in the insulating plate 413 and another portion of which is exposed outside the insulating plate 413 and connected to a first connector 42; the signal acquisition assembly 40 includes a plurality of acquisition elements 43, each acquisition element 43 being connected to at least one wire 414.

[0304] In this embodiment, the connection terminals 422 of the first connector 42 and the portions of the wire harness group 41 exposed outside the insulating plate 413 can be crimped, welded, or plugged.

[0305] By embedding a portion of each wire 414 within the insulating plate 413 and exposing the other portion of the wire 414 outside the insulating plate 413 and connecting it to the first connector 42, the risk of information acquisition failure caused by the wires 414 becoming entangled is reduced. Furthermore, the insulating plate 413 separates the wires 414, reducing the risk of short circuits and improving the reliability of the battery device 100.

[0306] like Figures 27-29 As shown, in some embodiments, the wire harness 41 includes an insulating layer 415 and a plurality of wires 414, each insulating layer 415 covering the outer periphery of at least one wire 414; the signal acquisition assembly 40 includes a plurality of acquisition elements 43, the two ends of the wires 414 being connected to the acquisition element 43 and the first connector 42 respectively, and each acquisition element 43 being connected to at least one wire 414.

[0307] An insulating layer 415 covers the outer periphery of at least one conductor 414 to form a columnar structure 41a. The wire harness assembly 41 may include one columnar structure 41a or multiple columnar structures 41a.

[0308] The columnar structure 41a and the first connector 42 can be integrally formed or electrically connected by welding.

[0309] Each insulating layer 415 covers the outer periphery of at least one conductor 414, such that the conductors 414 are separated by the insulating layer 415, reducing the risk of short circuits and improving the reliability of the battery device 100.

[0310] like Figure 3 As shown, in some embodiments, the battery device 100 includes a plurality of battery cell assemblies 20, which are arranged along a third direction Z. The first direction X intersects with the third direction Z, and each battery cell assembly 20 is provided with a corresponding signal acquisition component 40.

[0311] The battery device 100 includes multiple battery cell components 20, and the battery device 100 is correspondingly provided with multiple signal acquisition components 40. The battery cell components 20 and the signal acquisition components 40 can be set one-to-one.

[0312] By assembling multiple battery cell modules 20 in the battery device 100, the energy density of the battery device 100 is increased. Each battery cell module 20 is equipped with a corresponding signal acquisition component 40 to facilitate the acquisition of information from the individual battery cells 21 within each module. This allows for accurate and timely acquisition of information from the individual battery cells 21, providing reliable reference data to ensure the reliability of the battery device 100.

[0313] This application also provides an electrical device, which includes the battery device 100 provided in any of the above embodiments.

[0314] The battery device 100 provided in any of the above embodiments has good reliability, which is beneficial to improving the power reliability of the electrical device powered by the battery device 100.

[0315] This application provides a battery device 100, which includes a housing 10, multiple battery cell assemblies 20, multiple signal acquisition components 40, and multiple battery monitoring modules 50.

[0316] The housing 10 includes a bottom wall 121, which supports the battery cell assembly 20 along the second direction Y. The housing 10 is provided with a partition beam 60, which is disposed inside the housing 10 and connected to the housing 10. The partition beam 60 divides the internal space of the housing 10 into a first space Q1 and a second space Q2 arranged along the first direction X. The battery monitoring module 50 and the battery cell assembly 20 are respectively disposed in the first space Q1 and the second space Q2. Multiple battery monitoring modules 50 and multiple battery cell assemblies 20 are respectively located in the first space Q1 and the second space Q2.

[0317] Each battery cell assembly 20 includes a plurality of battery cells 21 arranged along a first direction X.

[0318] Multiple battery cell modules 20 are arranged along the Z-axis, multiple signal acquisition modules 40 are arranged along the Z-axis, and multiple battery monitoring modules 50 are arranged along the Z-axis. The signal acquisition modules 40 and battery cell modules 20 are configured in a one-to-one correspondence.

[0319] The signal acquisition component 40 includes an acquisition unit 43, a wiring harness group 41, and a first connector 42. The wiring harness group 41 connects the acquisition unit and the first connector 42. The acquisition unit of each signal acquisition component 40 is used to acquire information of the battery cell 21 of the corresponding battery cell assembly 20.

[0320] The battery monitoring module 50 is provided with a second connector 51. Some battery monitoring modules 50 are provided with one second connector 51, while other battery monitoring modules 50 are provided with multiple second connectors 51. The multiple second connectors 51 are arranged at intervals along the third direction Z.

[0321] The second connector 51 includes a first part 55 and a second part 56. The first part 55 is disposed on the bottom wall 121 of the box along the second direction Y. The second part 56 is connected to the surface of the first part 55 away from the bottom wall 121 and protrudes from the surface of the first part 55 away from the bottom wall 121. The second connector 51 is disposed on the second part 56.

[0322] The second connector 51 includes a socket for insertion of the first connector 42. Both the first connector 42 and the second connector 51 are located on the side of the battery cell assembly 20 facing the battery monitoring module 50 along the first direction X.

[0323] In some embodiments, the second connector 51 is disposed on the surface of the second part 56 of the battery monitoring module 50 facing the battery cell assembly 20 along the first direction X, and the first connector 42 and the second connector 51 are located between the battery cell assembly 20 and the battery monitoring module 50, and the insertion direction of the first connector 42 and the second connector 51 is parallel to the first direction X.

[0324] In other embodiments, the second connector 51 is disposed on the surface of the second part 56 of the battery monitoring module 50 away from the bottom wall 121 along the second direction Y, and the insertion direction of the first connector 42 and the second connector 51 is parallel to the second direction Y.

[0325] The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0326] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0327] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a battery cell assembly comprising a plurality of battery cells arranged along a first direction; a signal acquisition assembly configured to acquire information of the battery cells of the battery cell assembly, the signal acquisition assembly comprising a wire harness group and a first connector connected to one end of the wire harness group; a battery monitoring module provided with a second connector configured to be plugged with the first connector.

2. The battery device of claim 1, wherein The battery monitoring module and the battery cell assembly are arranged along the first direction, and along the first direction, the first connector and the second connector are located on a side of the battery cell assembly facing the battery monitoring module.

3. The battery device of claim 2, wherein Along the first direction, the second connector is arranged on a side of the battery monitoring module facing the battery cell assembly.

4. The battery device of claim 3, wherein Along the first direction, at least part of the first connector is located between the battery monitoring module and the battery cell assembly. In a projection plane perpendicular to the first direction, at least part of the first connector overlaps at least part of the battery cell.

5. The battery device according to claim 3 or 4, wherein The plugging direction of the first connector and the second connector is parallel to the first direction.

6. The battery device of claim 2, wherein The battery device comprises a box body, the battery cell assembly is accommodated in the box body, the box body comprises a box bottom wall, the box bottom wall supports the battery cell assembly along a second direction, the second direction intersects the first direction; Along the second direction, the second connector is arranged on a side of the battery monitoring module facing away from the box bottom wall.

7. The battery device of claim 6, wherein The battery cell comprises a shell and an electrode assembly, the electrode assembly is accommodated in the shell, along the second direction, the shell has a first surface facing away from the box bottom wall, the battery monitoring module does not exceed the first surface in the direction facing away from the box bottom wall.

8. The battery device according to claim 6 or 7, wherein The plugging direction of the first connector and the second connector is parallel to the second direction.

9. The battery device of any one of claims 1-8, wherein, The battery device comprises a box body, the battery cell assembly is accommodated in the box body, the box body comprises a box bottom wall, the box bottom wall supports the battery cell assembly along a second direction, the battery monitoring module is arranged on the box bottom wall, and the second direction intersects the first direction.

10. The battery device of claim 9, wherein, The battery monitoring module and the battery cell assembly are arranged along the first direction, the wire harness group comprises a main body area and a connection area, the main body area is arranged on a side of the battery cell assembly facing away from the box bottom wall and extends along the first direction, and the connection area exceeds a surface of the battery cell assembly facing the battery monitoring module along the first direction and is connected with the first connector.

11. The battery device according to claim 9 or 10, wherein The battery device further comprises a partition beam arranged in and connected with the box body, the partition beam divides an internal space of the box body into a first space and a second space arranged along the first direction, and the battery monitoring module and the battery cell assembly are arranged in the first space and the second space respectively.

12. The battery device of any one of claims 9-11, wherein, The battery device further comprises a locking member configured to lock the battery monitoring module to the box bottom wall.

13. The battery device of claim 12, wherein, In the second direction, the battery monitoring module has a second surface facing away from the bottom wall of the box, and the locking member is pressed against the second surface to lock the battery monitoring module to the bottom wall of the box.

14. The battery device according to claim 12 or 13, wherein Each battery monitoring module is provided with two locking members arranged in a third direction, and the first and second directions intersect the third direction.

15. The battery device of any one of claims 9-14, wherein, The battery monitoring module includes a first part and a second part, the first part is arranged on the bottom wall of the box, and in the second direction, the surface of the first part facing away from the bottom wall of the box is a second surface, the second part is connected to the second surface and protrudes from the second surface, and the second connector is arranged on the second part.

16. The battery device of claim 15, wherein, In the third direction, the second surface protrudes from both ends of the second part, and the first and second directions intersect the third direction.

17. The battery device of any one of claims 1-16, wherein, The battery device includes a plurality of signal acquisition assemblies arranged in a third direction, and the third direction intersects the first direction. Each battery monitoring module is provided with at least one signal acquisition assembly.

18. The battery device of claim 17, wherein, The battery device includes a plurality of battery monitoring modules arranged in a third direction, and the first and third directions intersect.

19. The battery device of claim 18, wherein, At least one battery monitoring module is provided with a plurality of second connectors, and each second connector is inserted and matched with the first connector of one signal acquisition assembly.

20. The battery device of claim 18, wherein, At least one battery monitoring module is provided with one second connector, and one second connector is inserted and matched with the first connector of one signal acquisition assembly.

21. The battery device of any one of claims 18-20, wherein, The at least one battery monomer assembly includes a positive electrode conveying part and a negative electrode conveying part. The battery device further includes a box, a first conductive structure and a second conductive structure, the battery monomer assembly is arranged in the box, the box is provided with a positive electrode leading part and a negative electrode leading part, the positive electrode leading part is connected with the positive electrode conveying part through the first conductive structure, the negative electrode leading part is connected with the negative electrode conveying part through the second conductive structure, and an avoidance gap is formed between two adjacent battery monitoring modules for the first and second conductive structures to pass through.

22. The battery device of any one of claims 1-21, wherein, The first connector is a male connector, the second connector is a female connector, and the first connector is inserted into the second connector.

23. The battery device of any one of claims 1-22, wherein, The first connector is crimped and connected with the wire harness group.

24. The battery device of any one of claims 1-22, wherein, The first connector is welded and connected with the wire harness group.

25. The battery device of any one of claims 1-22, wherein, The first connector is inserted and matched with the wire harness group.

26. The battery device of any one of claims 1-25, wherein, The first connector includes an insertion part and a connection terminal, the connection terminal is connected with the wire harness group, and the two ends of the insertion part are respectively inserted and matched with the connection terminal and the second connector.

27. The battery device of any one of claims 1-26, wherein, The wire harness group includes an insulating plate and a plurality of wires, a part of each wire is embedded in the insulating plate, and another part of the wire is exposed outside the insulating plate and connected with the first connector. The signal acquisition assembly includes a plurality of acquisition assemblies, and each acquisition assembly is connected with at least one wire.

28. The battery device of any one of claims 1-26, wherein, The wire harness group comprises insulating layers and a plurality of wires, each of the insulating layers covering an outer periphery of at least one of the wires; The signal acquisition component comprises a plurality of acquisition pieces, two ends of the wire being connected to the acquisition pieces and the first connector respectively, each of the acquisition pieces being connected to at least one of the wires.

29. The battery device of any one of claims 1-28, wherein, The battery device comprises a plurality of the battery cell components, the plurality of the battery cell components being arranged along a third direction, the first direction and the third direction intersecting, and each of the battery cell components being provided with one of the signal acquisition components.

30. An electrical device, comprising: A battery device comprising any of the features of claims 1-29.

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