Battery device and electric device

Abstract

The invention 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 batteries, and more particularly, to a battery device and an electrical device. Background Art

[0002] Currently, battery devices are widely used in fields such as electronic devices, transportation vehicles, power tools, drones, energy storage devices, etc. Therefore, higher requirements are put forward for the reliability of battery devices. Summary of the Invention

[0003] Embodiments of the present application provide a battery device and an electrical device, which can improve the reliability of the battery device.

[0004] In a first aspect, embodiments of the present application provide a battery device, which includes at least one battery cell assembly, a signal acquisition assembly, and a battery monitoring module; the battery cell assembly includes a plurality of battery cells arranged along a first direction; the signal acquisition assembly is configured to acquire information of the battery cells of the battery cell assembly, the signal acquisition assembly includes 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 plug-in fit with the first connector.

[0005] In the above technical solution, the signal acquisition assembly includes a first connector, and the battery monitoring module is provided with a second connector. Through the plug-in fit between the first connector and the second connector, the communication connection between the signal acquisition assembly and the battery monitoring module can be realized, and it is not necessary to connect the signal acquisition assembly and the battery monitoring module through a wire harness, reducing the space occupied by the communication connection between the signal acquisition assembly and the battery monitoring module, reducing the risk of sampling failure caused by interference and wear between the first connector and the second connector and the high-voltage box, busbar components, and the inner wall of the battery device box, improving the reliability of sampling, thereby improving the reliability of the battery device, and also reducing the cost of the battery device. In addition, the plug-in fit method is simple and reliable, which can reduce the assembly difficulty of the battery device.

[0006] In some embodiments of the first aspect of the present application, 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.

[0007] In the above technical solution, by arranging 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, facilitating connection, reducing the space occupied by the first connector and the second connector, being beneficial to improving the energy density of the battery device, and also reducing the risk of interference between the first connector and the second connector and other structures inside the battery device, and being able to improve the reliability of the battery device.

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

[0009] In the above technical solution, by arranging 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, facilitating the plugging of the first connector and the second connector, and also making the internal structure of the battery device more compact, being beneficial to reducing the volume of the battery device and improving the energy density of the battery device.

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

[0011] In the above technical solution, by arranging at least part of the first connector between the battery monitoring module and the battery cell assembly, and in the projection plane perpendicular to the first direction, at least part of the positive projection of the first connector overlaps at least part of the positive projection of the battery cell, then the first connector and the battery cell overlap in space, enabling 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, being beneficial to reducing the volume of the battery device and improving the energy density of the battery device.

[0012] In some embodiments of the first aspect of the present application, the plugging direction of the first connector and the second connector is parallel to the first direction.

[0013] In the above technical solution, by setting the plugging 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, reducing the space occupied by the first connector and the second connector in other directions, being 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 the present application, the battery device includes a box body, the battery cell assembly is accommodated in the box body, the box body includes a bottom wall of the box, the bottom wall of the box supports the battery cell assembly in a second direction, and the second direction intersects with the first direction; along the second direction, the second connector is disposed on a side of the battery monitoring module away from the bottom wall of the box.

[0015] In the above technical solution, by disposing the second connector on a 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 is beneficial to reducing the volume of the battery device.

[0016] In some embodiments of the first aspect of the present application, the battery cell includes a housing and an electrode assembly, the electrode assembly is accommodated in the housing, along the second direction, the housing has a first surface away from the bottom wall of the box, and the battery monitoring module does not extend beyond the first surface in a direction away from the bottom wall of the box.

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

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

[0019] In the above technical solution, since the insertion direction of the first connector and the second connector is parallel to the second direction, it is convenient for the first connector and the second connector to be inserted, and the space occupied by the first connector and the second connector in other directions other than the second direction can be reduced. When the battery monitoring module does not extend beyond the first surface in a direction away from the bottom wall of the box, the space on one side of the first surface of the box body in the second direction can be used to accommodate the first connector and the second connector, making full use of the space inside the battery device, reducing the space occupied by the second connector and the first connector in other directions, and being beneficial to reducing the volume of the battery device.

[0020] In some embodiments of the first aspect of the present application, the battery device includes a box body, the battery cell assembly is accommodated in the box body, the box body includes a bottom wall of the box, the bottom wall of the box supports the battery cell assembly in a second direction, the battery monitoring module is disposed on the bottom wall of the box, and the second direction intersects with the first direction.

[0021] In the above technical solution, by arranging the battery monitoring module on the bottom wall of the box, the arrangement of the battery monitoring module is facilitated and the stability of the battery monitoring module is improved.

[0022] In some embodiments of the first aspect of the present application, the battery monitoring module and the battery cell assembly are arranged along the first direction, the wiring harness group includes a main area and a connection area, the main area is arranged 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 exceeds 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, the connection area of ​​the wiring harness group is extended beyond the surface of the battery cell assembly facing the battery monitoring module along the first direction and connected to the first connector to facilitate the plugging of the first connector and the second connector. The main area of ​​the wiring harness group is arranged on the side of the battery cell assembly away from the bottom wall of the box to facilitate the signal acquisition component to collect information of the battery cell.

[0024] In some embodiments of the first aspect of the present application, the battery device also includes a partition beam, which is arranged in the box body and connected to the box body, and the partition beam divides the 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 respectively arranged in the first space and the second space.

[0025] In the above technical solution, the internal space of the box is divided into a first space and a second space arranged along a first direction by a partition beam, and the battery monitoring module and the battery cell assembly are respectively arranged in the first space and the second space, which facilitates the arrangement 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 the present application, the battery device further includes a locking member configured to lock the battery monitoring module to the bottom wall of the box.

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

[0028] In some embodiments of the first aspect of the present 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 is pressed against the second surface to lock the battery monitoring module to the bottom wall of the box.

[0029] In the above technical solution, the battery monitoring module is locked to the bottom wall of the box by pressing the locking member on the second surface. Therefore, there is no need to set a connecting member on the bottom wall of the box to lock the battery monitoring module to the bottom wall of the box, thereby reducing the impact on the strength of the box.

[0030] In some embodiments of the first aspect of the present application, two of the locking members are correspondingly provided for each battery monitoring module, and the two locking members are arranged at intervals in the third direction, and both the first direction and the second direction intersect with the third direction.

[0031] In the above technical solution, the battery monitoring module is locked to the bottom wall of the box by the two locking members together, improving the stability of the battery monitoring module and the uniformity of the force received by the battery monitoring module.

[0032] In some embodiments of the first aspect of the present 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 the second surface. The second part is connected to the second surface and protrudes from the second surface, and the second connector is disposed on the second part.

[0033] In the above technical solution, by connecting the second part to the second surface and protruding from the second surface, and disposing the second connector on the second part, it is convenient for the second connector to be inserted and mated with the first connector.

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

[0035] In the above technical solution, by the second surface protruding from both ends of the second part along the third direction, it is convenient for the locking member to press the second surface, and the second surface on both sides of the second part along the third direction can be pressed, and at least two locking members can lock the battery monitoring module to the bottom wall of the box together, improving the stability of the battery monitoring module and the uniformity of the force received by the battery monitoring module.

[0036] In some embodiments of the first aspect of the present application, the battery device includes a plurality of the signal acquisition components, and the plurality of signal acquisition components are arranged in the third direction, and the third direction intersects with the first direction; each battery monitoring module is correspondingly provided with at least one of the signal acquisition components.

[0037] In the above technical solution, by providing a plurality of signal acquisition components in the battery device, synchronous acquisition of information of battery cells of a plurality of battery cell components can be realized, so as to timely obtain information of the battery cells of the battery device.

[0038] In some embodiments of the first aspect of the present application, the battery device includes a plurality of the battery monitoring modules, and the plurality of battery monitoring modules are arranged in the third direction, and the first direction intersects with the third direction.

[0039] In the above technical solution, by arranging a plurality of battery monitoring modules in the battery device, it is convenient for the first connector of the signal acquisition component to be connected to the second connector of the battery monitoring module at a relatively short distance.

[0040] In some embodiments of the first aspect of the present application, at least one of the battery monitoring modules is provided with a plurality of the second connectors, and each of the second connectors is in plug-in fit with the first connector of one of the signal acquisition components.

[0041] In the above technical solution, by arranging at least one battery monitoring module with a plurality of second connectors, and each second connector is in plug-in fit with the first connector of one signal acquisition component, the number of battery monitoring modules of the battery device can be reduced, which can not only save costs, but also reduce the space occupied by the battery monitoring modules, reduce the volume of the battery device, and improve the energy density of the battery device.

[0042] In some embodiments of the first aspect of the present application, at least one of the battery monitoring modules is provided with one of the second connectors, and one of the second connectors is in plug-in fit with the first connector of one of the signal acquisition components.

[0043] In the above technical solution, by arranging at least one battery monitoring module with one second connector, and one second connector is in plug-in fit with the first connector of one signal acquisition component, it is convenient for signal transmission between the signal acquisition component and the battery monitoring module.

[0044] In some embodiments of the first aspect of the present application, the at least one battery cell assembly includes a positive electrode conveying portion and a negative electrode conveying portion; the battery device further includes a box body, a first conductive structure and a second conductive structure. The battery cell assembly is disposed in the box body. The box body is provided with a positive electrode lead-out portion and a negative electrode lead-out portion. The positive electrode lead-out portion is connected to the positive electrode conveying portion through the first conductive structure, and the negative electrode lead-out portion is connected to the negative electrode conveying portion through the second conductive structure. A clearance for the first conductive structure and the second conductive structure to pass through is formed between two adjacent battery monitoring modules.

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

[0046] In some embodiments of the first aspect of the present application, the first connector is a male connector, the second connector is a female connector, and the first connector is 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, so that the first connector is inserted into the second connector, facilitating the electrical connection between the first connector and the second connector.

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

[0049] In the above technical solution, by crimping the first connector to the wire harness group, the connection between the first connector and the wire harness group is convenient, and there is a relatively stable and reliable connection relationship between the first connector and the wire harness group. Crimping the first connector to the wire harness group also makes the connection more environmentally friendly and low-cost.

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

[0051] In the above technical solution, by welding the first connector to the wire harness group, the connection between the first connector and the wire harness group has good stability, and the integrity of the first connector and the wire harness group is also good, capable of withstanding greater external forces.

[0052] In some embodiments of the first aspect of the present application, the first connector is inserted and mated with the wire harness group.

[0053] In the above technical solution, by inserting and mating the first connector with the wire harness group, the connection between the first connector and the wire harness group is more simple and convenient.

[0054] In some embodiments of the first aspect of the present application, the first connector includes a plug-in portion and connection terminals. The connection terminals are connected to the wire harness group, and both ends of the plug-in portion are respectively inserted and mated with the connection terminals and the second connector.

[0055] In the above technical solution, by respectively inserting and mating both ends of the plug-in portion with the connection terminals and the second connector, the connection between the first connector and the second connector, as well as the connection between the first connector and the wire harness group, is more convenient.

[0056] In some embodiments of the first aspect of the present application, the wire harness group includes an insulating board and a plurality of wires. A part of each wire is buried in the insulating board, and the other part of the wire is exposed outside the insulating board and connected to the first connector; the signal acquisition component includes a plurality of acquisition parts, and each acquisition part is connected to at least one of the wires.

[0057] In the above technical solution, a part of each wire is embedded in the insulating board, and the other part of the wire is exposed outside the insulating board and connected to the first connector, reducing the risk of information collection failure caused by the wires winding around each other, and also separating the wires through the insulating board, reducing the risk of short circuit and improving the reliability of the battery device.

[0058] In some embodiments of the first aspect of the present application, the wire harness group includes an insulating layer and a plurality of wires, and each insulating layer covers the outer periphery of at least one of the wires; the signal acquisition assembly includes a plurality of acquisition components, and both ends of the wire are respectively connected to the acquisition component and the first connector, and each acquisition component is 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 wire, separating the wires through 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 the present application, the battery device includes a plurality of the battery monomer assemblies, the plurality of battery monomer assemblies are arranged along the third direction, the first direction intersects with the third direction, and one signal acquisition assembly is correspondingly arranged for each battery monomer assembly.

[0061] In the above technical solution, by arranging a plurality of battery monomer assemblies in the battery device, the energy density of the battery device is higher. By correspondingly arranging one signal acquisition assembly for each battery monomer assembly, it is convenient to collect the information of the battery monomers of each battery monomer assembly, so as to accurately and timely obtain the information of the battery monomers, providing reliable reference data for ensuring the reliability of the battery device.

[0062] In a second aspect, an embodiment of the present application provides an electrical device, and the electrical device includes the battery device provided in any embodiment of the first aspect.

[0063] In the above technical solution, the battery device provided in any embodiment of the first aspect has good reliability, which is beneficial to improving the power consumption reliability of the electrical device powered by the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0065] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0066] Figure 2 Exploded view of the battery device provided in some embodiments of the present application;

[0067] Figure 3 Partial schematic diagram of the battery device provided in some embodiments of the present application;

[0068] Figure 4 Exploded view of the battery cell provided in some embodiments of the present application;

[0069] Figure 5 Partial view of the battery device provided in some embodiments of the present application;

[0070] Figure 6 View of the battery device along the first direction provided in some embodiments of the present application;

[0071] Figure 7 View of the battery device along the third direction provided in some embodiments of the present application;

[0072] Figure 8 Schematic structural diagram of the battery monitoring module provided in some embodiments of the present application;

[0073] Figure 9 Schematic structural diagram of the battery monitoring module provided in some other embodiments of the present application;

[0074] Figure 10 Partial structural schematic diagram of the battery device provided in some other embodiments of the present application;

[0075] Figure 11 For Figure 10 Enlarged view of part A in;

[0076] Figure 12 Schematic diagram of the battery device along the third direction provided in some other embodiments of the present application;

[0077] Figure 13 Schematic structural diagram of the battery monitoring module provided in some further embodiments of the present application;

[0078] Figure 14 Schematic structural diagram of the battery monitoring module provided in some other embodiments of the present application;

[0079] Figure 15 Schematic diagram of the battery device along the third direction provided in some still further embodiments of the present application;

[0080] Figure 16 View of the battery device along the first direction provided in some yet further embodiments of the present application;

[0081] Figure 17Schematic diagram of the cooperation between the battery monitoring module and the locking part provided by some embodiments of the present application;

[0082] Figure 18 Schematic diagram of the structure of the battery monitoring module provided by some other embodiments of the present application;

[0083] Figure 19 Exploded view of the first connector and the second connector provided by some embodiments of the present application;

[0084] Figure 20 Exploded view of the first connector and the second connector provided by some other embodiments of the present application;

[0085] Figure 21 Schematic diagram of the structure of the connection terminal provided by some embodiments of the present application;

[0086] Figure 22 Schematic diagram of the connection terminal and the wire harness group after crimping provided by some embodiments of the present application;

[0087] Figure 23 Schematic diagram of the first connector and the second connector not plugged in provided by some other embodiments of the present application (the first connector is welded to the wire harness group);

[0088] Figure 24 Schematic diagram of the first connector and the second connector not plugged in provided by some other embodiments of the present application (the first connector is plugged into the wire harness group);

[0089] Figure 25 Schematic diagram of the first connector and the second connector not plugged in provided by some other embodiments of the present application (the first connector is plugged into the wire harness group);

[0090] Figure 26 Schematic diagram of the structure of the wire harness group provided by some embodiments of the present application;

[0091] Figure 27 Schematic diagram of a partial structure of the signal acquisition component provided by some other embodiments of the present application;

[0092] Figure 28 Schematic diagram of the first connector and the second connector not plugged in provided by some other embodiments of the present application;

[0093] Figure 29 Schematic diagram of the first connector and the second connector after being plugged in provided by some other embodiments of the present application.

[0094] Icons: 1000 - vehicle; 100 - battery device; 10 - box body; 11 - first box body; 12 - second box body; 121 - bottom wall of the box; 122 - side wall of the box; 20 - battery cell assembly; 21 - battery cell; 211 - outer shell; 2111 - housing; 21111 - opening; 2112 - end cap; 2113 - first surface; 212 - electrode assembly; 213 - electrode terminal; 214 - current collector member; 22 - positive electrode delivery part; 23 - negative electrode delivery part; 30 - bus bar component; 40 - signal acquisition assembly; 41 - wire harness group; 411 - main body area; 412 - connection area; 413 - insulating board; 414 - wire; 415 - insulating layer; 41a - columnar structure; 42 - first connector; 421 - insertion part; 422 - connection terminal; 43 - acquisition part; 50 - battery monitoring module; 51 - second connector; 511 - insertion hole; 52 - first end face; 53 - second end face; 54 - second surface; 55 - first part; 56 - second part; 60 - partition beam; 70 - locking part; 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 - avoidance gap. Detailed implementation manners

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

[0096] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0097] Referring to "embodiments" in this application means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0098] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", and "attached" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0099] The term "and / or" in the present application is merely an association relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0100] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed descriptions of the same components are omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device are only illustrative and should not constitute any limitation to the present application.

[0101] The term "a plurality of" appearing in the present application refers to two or more (including two).

[0102] In the embodiments of the present application, the battery cell may be a secondary battery, and a secondary battery refers to a battery cell that can be activated by charging after discharging to continue use.

[0103] The battery cell includes but is 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] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can reduce the risk of short circuit between the positive and negative electrodes and at the same time allow active ions to pass through.

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

[0106] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0107] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as 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 can include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery monomer can also be used. These positive electrode active materials can be used alone or in combination of two or more. Among them, examples of the lithium-containing phosphate can include but are not limited to lithium iron phosphate (such as LiFePO4 (which can also be abbreviated as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can 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, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3Mn 1 / 3 O2 (which can also be abbreviated as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (which can also be abbreviated as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (which can also be abbreviated as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (which can also be abbreviated as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (which can also be abbreviated as NCM811), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05at least one of O2) and its modified compounds, etc.

[0109] In some embodiments, the positive electrode can be made of porous metal. The porous metal can be porous nickel, porous copper, porous aluminum, porous alloy, etc. When the porous metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the porous metal, and of course, the positive electrode active material can also be provided. As an example, a lithium source material, potassium metal or sodium metal can also be filled and / or deposited in the porous metal, and the lithium source material is lithium metal and / or lithium-rich material.

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

[0111] As an example, the negative electrode current collector can be made of a metal foil, porous metal or composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. The porous metal can be porous nickel, porous copper, porous aluminum, porous alloy, etc. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as 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 plate can include a negative electrode current collector and a negative electrode active material provided on at least one surface of the negative electrode current collector.

[0113] As an example, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is provided on any one or both of the two opposite surfaces of the negative electrode current collector.

[0114] As an example, the negative electrode active material can be a negative electrode active material for a battery cell well-known in the art. As an example, the negative electrode active material can include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite and silicon alloy. The tin-based material can be selected from at least one of elemental tin, tin oxide compound and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of a battery cell can also be used. These negative electrode active materials can be used alone or in combination of two or more.

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

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

[0117] As an example, the material of the separator membrane can include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator membrane can be a single-layer film or a multi-layer composite film. When the separator membrane is a multi-layer composite film, the materials of each layer can be the same or different. The separator can be a single component located between the positive and negative electrodes, or 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 electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0119] In some embodiments, the battery cell further includes an electrolyte, which functions to conduct ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Among them, the liquid electrolyte includes an electrolyte salt and a solvent.

[0120] In some embodiments, the electrolyte salt can 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 difluoro(oxalato)borate, lithium bis(oxalato)borate, lithium difluoro(bis(oxalato))phosphate, and lithium tetrafluoro(oxalato)phosphate.

[0121] In some embodiments, the solvent can include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene 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 can also be an ether solvent. The ether solvent can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ether.

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

[0123] Among them, the solid electrolyte includes a polymer solid electrolyte, an inorganic solid electrolyte, and a composite solid electrolyte.

[0124] As an example, the polymer solid electrolyte can be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, single-ion polymer, polyionic liquid-lithium salt, cellulose, etc.

[0125] As an example, the inorganic solid electrolyte can include oxide solid electrolytes (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), sulfide solid electrolytes (crystalline lithium superionic conductor (lithium germanium phosphorus sulfur, argyrodite), amorphous sulfide), and one or more of halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0126] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to the polymer solid electrolyte.

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

[0128] In some embodiments, the electrode assembly has a laminated structure.

[0129] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be respectively provided, and the multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked.

[0130] As an example, multiple positive electrode sheets can be provided, and the negative electrode sheet is folded to form multiple folded segments arranged in a stacked manner, and a positive electrode sheet is clamped between adjacent folded segments.

[0131] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple folded segments arranged in a stacked manner.

[0132] As an example, multiple separators can be provided and are respectively arranged between any adjacent positive electrode sheets or negative electrode sheets.

[0133] As an example, the separators can be continuously provided and are arranged between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0134] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, prismatic, etc.

[0135] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0136] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0137] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, and the multi-prismatic battery cell is, for example, a hexagonal prism battery cell, etc.

[0138] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0139] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module.

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

[0141] In some embodiments, the battery device can be a battery pack, and the battery pack can include a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0142] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0143] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0144] As an example, the box body can include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box body to accommodate the battery cell assembly. The closed here means covering or closing, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0145] As an example, the box body can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0146] As an example, the box body can be a part of the chassis structure of a vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0147] In some embodiments, the battery device refers to an energy storage device, which includes a box body, and at least one side of the box body is provided with a door. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0148] The battery device includes at least one battery cell assembly, a signal acquisition assembly, and a battery monitoring module. The signal acquisition assembly can acquire information of the battery cells of the battery cell assembly and transmit the acquired information to the battery monitoring module. In the related art, in order to realize the signal transmission between the signal acquisition assembly and the battery monitoring module, the signal acquisition assembly and the battery monitoring module are connected by a wire harness. The wire harness occupies a large space inside the battery device, reducing the energy density of the battery device. In addition, the wire harness is prone to interference and wear with the high-voltage box, busbar components, and the inner wall of the box body inside the box, resulting in sampling failure and reduced reliability. Moreover, the overall price of the patch cord is too high, making the cost of the battery device higher.

[0149] Based on the above considerations, in order to improve the reliability and energy density of the battery device, an embodiment of the present application provides a battery device. The signal acquisition assembly of the battery device includes a wire harness group and a first connector. The first connector is connected to one end of the wire harness group. The acquisition unit of each signal acquisition assembly is used to acquire information of the battery cells of a battery cell assembly; the battery monitoring module of the battery device is provided with a second connector, and the second connector is in plug-in fit with the first connector.

[0150] The signal acquisition assembly includes a first connector, and the battery monitoring module is provided with a second connector. Through the plug-in fit of the first connector and the second connector, the communication connection between the signal acquisition assembly and the battery monitoring module can be realized, and it is not necessary to connect the signal acquisition assembly and the battery monitoring module by a wire harness. The space occupied by the communication connection between the signal acquisition assembly and the battery monitoring module 50 is reduced, and the risk of sampling failure caused by interference and wear of the first connector and the second connector with the high-voltage box, busbar components, and the inner wall of the box body of the battery device is reduced, improving the reliability of the sampling, thereby improving the reliability of the battery device, and the cost of the battery device can also be reduced. In addition, the plug-in fit method is simple and reliable, and the assembly difficulty of the battery device can be reduced.

[0151] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0152] For the convenience of description, the following embodiments take a vehicle as an example of the electrical device for description.

[0153] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of vehicle 1000 provided by some embodiments of the present application. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000.

[0154] The vehicle 1000 may further 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, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0155] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of 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 Explosion diagram of the battery device 100 provided by some embodiments of the present application, Figure 3 Partial schematic diagram of the battery device 100 provided by some embodiments of the present application. The battery device 100 may include a box body 10 and a battery cell assembly 20. The box body 10 is used to accommodate the battery cell assembly 20.

[0157] Among them, a closed space for accommodating the battery cell assembly 20 is formed inside the box body 10. The box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 are buckled with each other. The first box body 11 and the second box body 12 can be of various shapes, such as a cuboid, a cylinder, etc. The first box body 11 can be a hollow structure with one side open, and the second box body 12 can also be a hollow structure with one side open. The open side of the second box body 12 and the open side of the first box body 11 are buckled with each other, thus forming the box body 10 with a closed space. It can also be that the first box body 11 is a hollow structure with one side open, and the second box body 12 is a plate-like structure. The second box body 12 is buckled on the open side of the first box body 11, thus forming the box body 10 with an accommodating space.

[0158] In the battery device 100, the battery device 100 may include a battery cell assembly 20, and the battery cell assembly 20 includes a plurality of battery cells 21 arranged along the first direction X. Among them, the battery device 100 may include one battery cell assembly 20 or may include a plurality of battery cell assemblies 20. In the battery device 100, the plurality of battery cells 21 may be connected in series, in parallel, or in a combined series-parallel connection. The combined series-parallel connection means that there are both series and parallel connections among the plurality of battery cells 21. It can be understood that the battery cell assembly 20 may be formed by connecting a plurality of battery cells 21 in series, in parallel, or in a combined series-parallel connection. In an embodiment where the battery device 100 includes a plurality of battery cell assemblies 20, the plurality of battery cell assemblies 20 may be further connected in series, in parallel, or in a combined series-parallel connection to form an integral body and be accommodated in the box 10.

[0159] In some embodiments, the battery device 100 may further include a busbar component 30. In the same battery cell assembly 20, the plurality of battery cells 21 may be electrically connected through the busbar component 30 to achieve series, parallel, or combined series-parallel connection of the plurality of battery cells 21. The plurality of battery cell assemblies 20 may also be electrically connected through the busbar component 30 to achieve series, parallel, or combined series-parallel connection of the plurality of battery cell assemblies 20. The busbar component 30 may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

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

[0161] In some embodiments, the housing 211 may include a shell 2111 and an end cap 2112. The shell 2111 has an opening 21111, and the end cap 2112 closes the opening 21111 of the shell 2111. Here, "closing" means covering or closing, which may be a seal or may not be a seal.

[0162] The shell 2111 is a component for accommodating the electrode assembly 212. The shell 2111 may be a hollow structure with an opening 21111 formed at one end, or the shell 2111 may be a hollow structure with openings 21111 formed at opposite ends. The shell 2111 may be in various shapes, such as cylindrical, cuboid, etc. The material of the shell 2111 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 212 may be partially located in the shell 2111 or may be entirely located in the shell 2111.

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

[0164] In an embodiment where the housing 2111 has an opening 21111 formed at one end, one end cap 2112 can be correspondingly provided. In an embodiment where the housing 2111 has openings 21111 formed at opposite ends, two end caps 2112 can be correspondingly provided. 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 jointly define the receiving space.

[0165] In some embodiments, the battery cell 21 may further include electrode terminals 213. The electrode terminals 213 are provided on the outer shell 211 and are used to electrically connect to the tabs of the electrode assembly 212 to input or output the electrical energy of the battery cell 21. The electrode terminals 213 can be provided on the housing 2111 of the outer shell 211 or on the end cap 2112 of the outer shell 211. The electrode terminals 213 and the tabs can be directly connected. For example, the electrode terminals 213 and the tabs are welded. The electrode terminals 213 and the tabs can also be indirectly connected. For example, the electrode terminals 213 and the tabs are indirectly connected through a current collecting member 214. The current collecting member 214 can be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

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

[0167] As Figure 3 、 Figures 5 - 7As shown, in some embodiments, the battery device 100 includes a battery cell assembly 20, a signal acquisition assembly 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 assembly 40 is configured to acquire information of the battery cells 21 of the battery cell assembly 20, the signal acquisition assembly 40 includes a wire harness group 41 and a first connector 42, and the first connector 42 is connected to one end of the wire harness group 41; the battery monitoring module 50 is provided with a second connector 51, and the second connector 51 is in plug-in fit with the first connector 42.

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

[0169] One signal acquisition assembly 40 may be correspondingly provided for one battery cell assembly 20, and each signal acquisition assembly 40 acquires information of the battery cells 21 of the corresponding battery cell assembly 20.

[0170] One signal acquisition assembly 40 may also correspond to a plurality of battery cell assemblies 20, and one signal acquisition assembly 40 acquires information of the battery cells 21 of the corresponding plurality of battery cell assemblies 20.

[0171] The signal acquisition assembly 40 is configured to acquire information of the battery cells 21, such as temperature information, voltage information, etc. The signal acquisition assembly 40 may have various forms. For example, the signal acquisition assembly 40 may be an FPC (Flexible Printed Circuitboard), an FFC (Flexible Flat Cable), etc.

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

[0173] One battery cell 21 may correspond to one acquisition member 43, or one battery cell 21 may correspond to a plurality of acquisition members 43. In the embodiments where one battery cell 21 corresponds to a plurality of acquisition members 43, the plurality of acquisition members 43 may be different to acquire different information of the battery cell 21. For example, one battery cell 21 is correspondingly provided with two acquisition members 43, and the two acquisition members 43 are respectively configured to acquire the temperature and voltage of the battery cell 21.

[0174] The battery monitoring module 50 is a CMC (Cell monitoring circuit), which receives the information of the battery cell 21 collected by the signal collection component 40 so as to monitor the battery cell 21 , such as monitoring the voltage and temperature of the battery cell 21 .

[0175] The first connector 42 and the second connector 51 are plugged together, and one of the first connector 42 and the second connector 51 has a plug hole 511 for the other to be inserted into. 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 plugged in, a communication connection is achieved between the information acquisition component and the battery monitoring module 50 , and the information of the battery cells 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 first connector 42 and the second connector 51 are plugged together to realize the communication connection between the signal acquisition component 40 and the battery monitoring module 50. It is not necessary to connect the signal acquisition component 40 and the battery monitoring module 50 through a wiring harness, which reduces the space occupied by the communication connection between the signal acquisition component 40 and the battery monitoring module 50, reduces the risk of sampling failure caused by interference and wear between the first connector 42 and the second connector 51 and the high-voltage box, the confluence component 30 and the inner wall of the box 10 of the battery device 100, improves the reliability of the adoption, thereby improving the reliability of the battery device 100, and can also reduce the cost of the battery device 100. In addition, the plug-in matching method is simple and reliable, which can reduce the difficulty of assembling 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 the first direction X. Along the first direction X, the first connector 42 and the second connector 51 are located on a side of the battery cell assembly 20 facing the battery monitoring module 50 .

[0179] In the first direction X, the first connector 42 and the second connector 51 may be located between the battery monitoring module 50 and the battery cell assembly 20 . In the first direction X, the first connector 42 and the second connector 51 may also be located on a side of the battery monitoring module 50 away from the battery cell assembly 20 .

[0180] By arranging 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, which facilitates the connection and reduces 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, and can improve 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 a side of the battery monitoring module 50 facing the battery cell assembly 20 .

[0182] The second connector 51 is arranged on the side of the battery monitoring module 50 facing the battery cell assembly 20, and the plug-in direction of the first connector 42 and the second connector 51 can be parallel to the first direction X. This plug-in method allows the first connector 42 and the second connector 51 to form a vertical structure after being plugged in.

[0183] like Figure 7 , Figure 8 As shown, the battery monitoring module 50 is a plate-like structure, the first direction X is parallel to the thickness direction of the battery monitoring module 50, the plug-in direction of the first connector 42 and the second connector 51 is parallel to the thickness direction of the battery monitoring module 50, and the first connector 42 and the second connector 51 form a vertical structure after being plugged in.

[0184] In the embodiment where the second connector 51 has an insertion hole 511 for inserting the first connector 42 , the entrance of the insertion hole 511 for inserting the first connector 42 faces 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.

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

[0186] like Figure 7 , Figure 8 As shown, the second connector 51 can be protruded from the first end surface 52, and the second connector 51 extends from the first end surface 52 toward the direction close to the battery cell assembly 20, and the plug-in hole 511 is recessed from the end of the second connector 51 away from the first end surface 52 toward the direction close to the first end surface 52.

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

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

[0189] By disposing 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, facilitating the insertion of the first connector 42 and the second connector, and also making the internal structure of the battery device 100 more compact, which is beneficial to reducing the volume of the battery device 100 and increasing the energy density of the battery device 100.

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

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

[0194] Wherein, the first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs.

[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 in a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of the first connector 42 overlaps at least a portion of the orthographic projection of the battery cell 21, the first connector 42 and the battery cell 21 spatially overlap, enabling the first connector 42 to make full use of 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, which is beneficial to reducing the volume of the battery device 100 and increasing the energy density of the battery device 100.

[0196] As Figures 5 - 7 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] Then, after the first connector 42 and the second connector 51 are inserted, a vertical structure is formed.

[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, reducing the space occupied by the first connector 42 and the second connector 51 in other directions, which is beneficial to reducing the size of the battery device 100 in other directions and the volume of the battery device 100.

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

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

[0201] The second connector 51 is disposed on a side of the battery monitoring module 50 away from the box 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, and this insertion method makes the first connector 42 and the second connector 51 form a horizontal structure after being inserted.

[0202] As Figures 10 - 11As shown, the battery monitoring module 50 is in 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, a horizontal structure is formed.

[0203] In an embodiment where the second connector 51 has an insertion hole 511 for the first connector 42 to insert, the entrance of the insertion hole 511 for the first connector 42 to insert faces away from the bottom wall 121 of the box. Then, 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 farthest from the bottom wall 121 of the box.

[0205] As Figure 13 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. The insertion hole 511 is recessed from one 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] As Figure 14 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 in a direction close to the bottom wall 121 of the box.

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

[0208] By arranging the second connector 51 on the side of the battery monitoring module 50 away from the bottom wall 121 of the box, 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 is beneficial to reducing the volume of the battery device 100.

[0209] As Figure 15 shown, in some embodiments, the battery cell 21 includes a housing 211 and an electrode assembly 212. The electrode assembly 212 is accommodated in the housing 211. Along the second direction Y, the housing 211 has a first surface 2113 that is away from the bottom wall 121 of the box. 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.

[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 placed upright and the electrode terminal 213 of the battery cell 21 is disposed on the end cap 2112 and protrudes from the surface of the end cap 2112 in a direction away from the bottom wall 121 of the box, the first surface 2113 is the outer surface of the end cap 2112. For another example, in an embodiment where the battery cell 21 is placed upside down and the electrode terminal 213 of the battery cell 21 is disposed on the end cap 2112 and protrudes from the surface of the end cap 2112 in a direction facing the bottom wall 121 of the box, the first surface 2113 is the outer surface of the wall portion of the housing 2111 opposite to the end cap 2112.

[0211] In the second direction Y, the end of the battery monitoring module 50 farthest from the bottom wall 121 of the box can be flush with the first surface 2113, or, in the second direction Y, the surface of the battery monitoring module 50 farthest from the bottom wall 121 of the box is closer to the bottom wall 121 relative to the first surface 2113. Figure 15 The situation where the surface of the battery monitoring module 50 farthest from the bottom wall 121 of the box is closer to the bottom wall 121 relative to the first surface 2113 is shown. Among them, in the second direction Y, the surface of the battery monitoring module 50 farthest from the bottom wall 121 of the box can be the second end face 53 or a surface of the second connector 51.

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

[0213] Such as 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] Then, after the first connector 42 and the second connector 51 are inserted, a horizontal structure is formed.

[0215] Since the insertion directions of the first connector 42 and the second connector 51 are parallel to the second direction Y, it is convenient for the first connector 42 and the second connector 51 to be inserted, and the space occupied by the first connector 42 and the second connector 51 in other directions except the second direction Y can be reduced. When the battery monitoring module 50 does not exceed 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 of the box body 10 in the second direction Y can be used to accommodate the first connector and the second connector 51, making full use of the space inside the battery device 100, reducing the space occupied by the second connector 51 and the first connector 42 in other directions, and being beneficial to reducing the volume of the battery device 100.

[0216] As Figure 15 shown, in some embodiments, the battery device 100 includes a box body 10, a battery cell assembly 20 is accommodated in the box body 10, the box body 10 includes a bottom wall 121 of the box, the bottom wall 121 of the box supports the battery cell assembly 20 in the second direction Y, a battery monitoring module 50 is arranged on the bottom wall 121 of the box, and the second direction Y intersects with the first direction X.

[0217] The battery monitoring module 50 can be in contact with the bottom wall 121 of the box without other connection relationships. Understandably, the bottom wall 121 of the box plays a supporting role for the battery monitoring module 50, avoiding unstable connection of the first connector 42 and the second connector 51 caused by the suspension of the battery monitoring module 50.

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

[0219] By arranging the battery monitoring module 50 on the bottom wall 121 of the box, it is convenient to arrange the battery monitoring module 50 and improve the stability of the battery monitoring module 50.

[0220] As Figure 15 shown, in some embodiments, the battery monitoring module 50 and the battery cell assembly 20 are arranged along the first direction X. The wire harness group 41 includes a main body area 411 and a connection area 412. The main body area 411 is arranged 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 part 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.

[0221] In the embodiment where the battery cell 21 is placed upright and the electrode terminal 213 of the battery cell 21 faces away from the outer surface of the protruding end cover 2112 of the bottom wall 121 of the box, the main body area 411 can be located on the side of the electrode terminal 213 away from the bottom wall 121 of the box. 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 the embodiment where the battery cell 21 is placed upright and the electrode terminal 213 of the battery cell 21 faces away from the outer surface of the protruding end cover 2112 of the bottom wall 121 of the box, the main body area 411 can be arranged to avoid the electrode terminal 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 terminal 213 do not overlap.

[0223] The connection area 412 extends beyond the battery cell assembly 20 in 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 can be at least partially located between the battery monitoring module 50 and the battery cell assembly 20.

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

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

[0227] The connection area 412 can also be bent relative to the main body area 411 so that the connection area 412 can be adjusted to a form convenient for the first connector 42 and the second connector 51 to be plugged in.

[0228] Exemplarily, as Figure 7 shown, in the embodiment where the second connector 51 is arranged 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 in the direction close to the bottom wall 121, and then bent for the second time at another position in the extending direction of the connection area 412 so that a part of the connection area 412 is closer to the bottom wall 121 than 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 body 10.

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

[0230] By connecting the main area 411 of the wiring harness group 41 to the collection piece 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, so as to facilitate the plugging of the first connector 42 and the second connector 51, and facilitate the collection piece 43 to collect information of the battery cell 21.

[0231] like Figure 15 As shown, in some embodiments, the battery device 100 also includes a partition beam 60, which is disposed in the box body 10 and connected to the box body 10. The partition beam 60 divides the internal space of the box body 10 into a first space Q1 and a second space Q2 arranged along a 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 further includes a box side wall 122 , which is disposed around 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 may be connected to the box bottom wall 121 , for example, the partition beam 60 is connected to the box bottom wall 121 by bonding, welding, bolt connection, etc.

[0234] The partition beam 60 may 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 bonding, welding, bolt connection, etc.

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

[0236] Of course, the partition beam 60 and the box body 10 may also be an integrally formed structure.

[0237] The internal space of the box body 10 is divided into a first space Q1 and a second space Q2 arranged along the first direction X by a partition beam 60. The battery monitoring module 50 and the battery cell assembly 20 are respectively arranged in the first space Q1 and the second space Q2, which facilitates the arrangement 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] As Figure 16 , Figure 17 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 box.

[0239] The locking member 70 can lock the battery monitoring module 50 to the bottom wall 121 by connecting the battery monitoring module 50 and the bottom wall 121. The locking member 70 can be an adhesive, a bolt, a screw, etc.

[0240] The locking member 70 can press the battery monitoring module 50 against the bottom wall 121 to lock the battery monitoring module 50 to the bottom wall 121.

[0241] Locking the battery monitoring module 50 to the bottom wall 121 through the locking member 70 improves the stability of the battery monitoring module 50.

[0242] As Figure 16 , Figure 17 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 box, and the locking member 70 presses against the second surface 54 to lock the battery monitoring module 50 to the bottom wall 121.

[0243] The second surface 54 can be the surface of the battery monitoring module 50 that is farthest from the bottom wall 121 along the second direction Y, or it can be other surfaces of the battery monitoring module 50 that are opposite to the bottom wall 121 along the second direction Y.

[0244] The locking member 70 can have various structural forms. Exemplarily, the locking member 70 is a long bolt. One end of the long bolt presses against the second surface 54. The locking member 70 can be threadedly connected to the box body 10 or other structures inside the box body 10. The locking member 70 being a long bolt can not only press the battery monitoring module 50 but also 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, it is not necessary to provide a connecting member on the bottom wall 121 to lock the battery monitoring module 50 to the bottom wall 121, reducing the impact on the strength of the box body 10.

[0246] A battery monitoring module 50 can be provided with one locking member 70 or multiple locking members 70 correspondingly. The battery monitoring module 50 is pressed against the bottom wall 121 of the box by multiple locking members 70 together, so that the stability of the battery monitoring module 50 is better. Exemplarily, two locking members 70 are provided correspondingly for each battery monitoring module 50. The two locking members 70 are arranged at intervals along the 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 in pairs.

[0248] The battery monitoring module 50 is locked to the bottom wall 121 of the box by two locking members 70 together, improving the stability of the battery monitoring module 50 and the uniformity of the force received by the battery monitoring module 50.

[0249] Such as 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 arranged 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 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 arranged on the second part 56.

[0250] The first part 55 and the second part 56 can be separately arranged and then connected into one body to form the battery monitoring module 50. The first part 55 and the second part 56 can be bonded, welded, etc.

[0251] The first part 55 and the second part 56 can also be integrally formed.

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

[0253] The second connector 51 is arranged on the second part 56, and the locking member 70 presses against the second surface 54, reducing the risk of interference between the second connector 51 and the first connector 42 after being plugged and the locking member 70.

[0254] By connecting the second part 56 to the second surface 54 and protruding from the second surface 54, and arranging the second connector 51 on the second part 56, it is convenient for the second connector 51 to be plugged and matched with the first connector 42.

[0255] At least a partial region of the second surface 54 protrudes from the outer peripheral surface of the second part 56, that is, the second surface 54 can protrude from any region of the outer peripheral surface of the second part 56. A part of the edge of the second surface 54 can be flush with the outer peripheral surface of the second part 56, and a part of the second surface 54 protrudes from the outer peripheral surface of the second part 56. The region where the second surface 54 protrudes from the second part 56 can be pressed against the locking member 70 to press the battery monitoring module 50 against the bottom wall 121 of the box.

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

[0257] By the second surface 54 protruding from both ends of the second part 56 along the third direction Z, it is convenient for the locking member 70 to press the second surface 54, and the second surface 54 can be pressed 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, improving the stability of the battery monitoring module 50 and the uniformity of the force on the battery monitoring module 50.

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

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

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

[0261] The plurality of signal acquisition components 40 can be arranged side by side along the third direction Z. Each battery monitoring module 50 can be provided with one second connector 51 or a plurality of second connectors 51. In the embodiments where the battery monitoring module 50 is provided with a plurality of second connectors 51, one battery monitoring module 50 can be inserted and cooperated with the first connectors 42 of a plurality of signal acquisition components 40, so as to communicate with a plurality of information acquisition components.

[0262] By arranging a plurality of signal acquisition components 40 in the battery device 100, synchronous acquisition of information of the battery cells 21 of a plurality of battery cell components 20 can be achieved, so that the information of the battery cells 21 of the battery device 100 can be obtained in a timely manner.

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

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

[0265] By arranging a plurality of battery monitoring modules 50 in the battery device 100, it is convenient for the first connector 42 of the signal acquisition component 40 to be connected to the second connector 51 of the battery monitoring module 50 at a relatively short distance.

[0266] As Figure 16 、 Figure 18 shown, in some embodiments, at least one battery monitoring module 50 is provided with a plurality of second connectors 51, and each second connector 51 is in plug-in fit with the first connector 42 of a signal acquisition component 40.

[0267] Some of the plurality of battery monitoring modules 50 can be provided with one second connector 51, and another part of the plurality of battery monitoring modules 50 can be provided with a plurality of second connectors 51.

[0268] Of course, all the battery monitoring modules 50 can be provided with a plurality of second connectors 51.

[0269] The battery monitoring module 50 provided with a plurality of second connectors 51 can be in plug-in fit with the first connectors 42 of a plurality of information acquisition components, so as to realize communication connection between one battery monitoring module 50 and a plurality of information acquisition components.

[0270] By at least one battery monitoring module 50 being provided with a plurality of second connectors 51, and each second connector 51 being in plug-in fit with the first connector 42 of a signal acquisition component 40, the number of battery monitoring modules 50 of the battery device 100 can be reduced, which can not only save costs, but also reduce the space occupied by the battery monitoring modules 50, reduce the volume of the battery device 100, and improve the energy density of the battery device 100.

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

[0272] Some of the multiple battery monitoring modules 50 may be provided with one second connector 51, and another part of the multiple battery monitoring modules 50 may be provided with multiple second connectors 51.

[0273] Of course, all the battery monitoring modules 50 may be provided with one second connector 51.

[0274] By providing at least one battery monitoring module 50 with a second connector 51, and the second connector 51 being plugged and mated with a first connector 42 of a signal acquisition component 40, it facilitates signal transmission between the signal acquisition component 40 and the battery monitoring module 50.

[0275] Such as Figure 16 As shown, in an embodiment where the battery device 100 includes multiple battery monitoring modules 50, some of the multiple battery monitoring modules 50 are provided with one second connector 51, and another part of the multiple battery monitoring modules 50 are provided with multiple second connectors 51.

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

[0277] All the battery cell components 20 are connected in series, parallel, or in a mixed connection to form a battery module, and the positive electrode output portion and the negative electrode output portion are respectively two electrodes with opposite polarities of the battery module.

[0278] The positive electrode lead-out portion and the negative electrode lead-out portion are respectively electrically connected to an external device of the battery device 100 to realize the charging and discharging electrodes of the battery device 100.

[0279] The first conductive structure 80 and the second conductive structure 90 may be a wire 414, a metal plate, etc.

[0280] The avoidance gap Q3 formed between two adjacent battery monitoring modules 50 can be defined by the second parts 56 of the two adjacent battery monitoring modules 50, or can be jointly defined by the first parts 55 and the second parts 56 of the two adjacent battery monitoring modules 50.

[0281] By forming an avoidance gap Q3 through which the first conductive structure 80 and the second conductive structure 90 pass between two adjacent battery monitoring modules 50, the risk of interference between the first conductive structure 80 and the second conductive structure 90 and the battery monitoring module 50 is reduced, and the stability of power transmission and the reliability of the battery device 100 are improved.

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

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

[0284] By the first connector 42 being a male connector and the second connector 51 being a female connector, the first connector 42 is inserted into the second connector 51, facilitating the electrical connection between the first connector 42 and the second connector 51.

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

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

[0287] The wire harness group 41 includes an insulating board 413 and a wire 414. A part of the wire 414 is buried in the insulating board 413, and another part of the wire 414 is exposed outside the insulating board 413.

[0288] As Figure 20 、 Figure 21 shown, the first connector 42 includes a plugging part 421 and a connection terminal 422. The plugging part 421 and the connection terminal 422 are connected, and the plugging part 421 is used for plugging and mating with the second connector 51.

[0289] As Figure 22 shown, after the connection terminal 422 pierces the insulating board 413, the connection terminal 422 can be bent by an external force so that the connection terminal 422 surrounds the wire 414 exposed outside the insulating board 413, thereby realizing the crimping between the first connector 42 and the wire harness group 41.

[0290] Each first connector 42 may include one connection terminal 422 or may include a plurality of connection terminals 422. In an embodiment where the first connector 42 includes a plurality of connection terminals 422, the wire harness group 41 may include a plurality of wires 414, and each connection terminal 422 may surround one wire 414 or may surround a plurality of wires 414.

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

[0292] By crimping and connecting the first connector 42 with the wire harness group 41, the connection between the first connector 42 and the wire harness group 41 is convenient, and there is a relatively stable and reliable connection relationship between the first connector 42 and the wire harness group 41. The crimping connection between the first connector 42 and the wire harness group 41 also makes the connection more environmentally friendly and low-cost.

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

[0294] The connection terminal 422 of the first connector 42 and the part of the wire 414 exposed outside the insulating plate 413 are welded. The welding method can be laser welding, ultrasonic welding, etc.

[0295] By welding and connecting the first connector 42 with the wire harness group 41, the connection between the first connector 42 and the wire harness group 41 has better stability, and the integrity of the first connector 42 and the wire harness group 41 is also better, and it can withstand greater external forces.

[0296] In some other embodiments, such as Figure 24 As shown, the first connector 42 is pluggably mated with the wire harness group 41.

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

[0298] By pluggably mating the first connector 42 with the wire harness group 41, the connection between the first connector 42 and the wire harness group 41 is more simple and convenient.

[0299] The plugging part 421 and the connection terminal 422 may be detachably connected or may be fixedly connected.

[0300] Such as Figure 24 、 Figure 25 As shown, in some embodiments, the first connector 42 includes a plugging part 421 and a connection terminal 422, the connection terminal 422 is connected to the wire harness group 41, and both ends of the plugging part 421 are respectively pluggably mated with the connection terminal 422 and the second connector 51.

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

[0302] By inserting and mating the two ends of the insertion part 421 with 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 the connection between the first connector 42 and the wire harness group 41, becomes more convenient.

[0303] As Figure 26 shown, in some embodiments, the wire harness group 41 includes an insulating plate 413 and a plurality of wires 414. A part of each wire 414 is buried in the insulating plate 413, and the other part of the wire 414 is exposed outside the insulating plate 413 and connected to the first connector 42; the signal acquisition assembly 40 includes a plurality of acquisition parts 43, and each acquisition part 43 is connected to at least one wire 414.

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

[0305] By burying a part of each wire 414 in the insulating plate 413, and exposing the other part 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 being wound around each other is reduced, and the wires 414 are separated by the insulating plate 413, reducing the risk of short circuit and improving the reliability of the battery device 100.

[0306] As Figures 27 - 29 shown, in some embodiments, the wire harness group 41 includes an insulating layer 415 and a plurality of wires 414. Each insulating layer 415 is coated on the outer periphery of at least one wire 414; the signal acquisition assembly 40 includes a plurality of acquisition parts 43, and both ends of the wire 414 are respectively connected to the acquisition part 43 and the first connector 42, and each acquisition part 43 is connected to at least one wire 414.

[0307] After the insulating layer 415 is coated on the outer periphery of at least one wire 414, a columnar structure 41a is formed. The wire harness group 41 may include one columnar structure 41a or a plurality of columnar structures 41a.

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

[0309] Each insulating layer 415 is coated on the outer periphery of at least one wire 414, so that the wires 414 are separated by the insulating layer 415, reducing the risk of short circuit and improving the reliability of the battery device 100.

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

[0311] Since the battery device 100 includes a plurality of battery cell assemblies 20, a plurality of signal acquisition assemblies 40 are correspondingly provided for the battery device 100. The battery cell assemblies 20 and the signal acquisition assemblies 40 can be arranged in a one-to-one correspondence.

[0312] By providing a plurality of battery cell assemblies 20 in the battery device 100, the energy density of the battery device 100 is higher. By correspondingly providing one signal acquisition assembly 40 for each battery cell assembly 20, it is convenient to collect information of the battery cells 21 of each battery cell assembly 20, so as to accurately and timely obtain the information of the battery cells 21, providing reliable reference data for ensuring the reliability of the battery device 100.

[0313] An embodiment of the present application further provides an electrical device, and the electrical device 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 utilization reliability of the electrical device powered by the battery device 100.

[0315] An embodiment of the present application provides a battery device 100, which includes a box body 10, a plurality of battery cell assemblies 20, a plurality of signal acquisition assemblies 40, and a plurality of battery monitoring modules 50.

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

[0318] The plurality of battery cell assemblies 20 are arranged along the third direction Z, the plurality of signal acquisition assemblies 40 are arranged along the third direction Z, and the plurality of battery monitoring modules 50 are arranged along the third direction Z. The signal acquisition assemblies 40 and the battery cell assemblies 20 are arranged in a one-to-one correspondence.

[0319] The signal acquisition component 40 includes an acquisition part 43, a wire harness group 41, and a first connector 42. The wire 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 component 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, and the other part of the 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 facing away from the bottom wall 121 of the box and protrudes from the surface of the first part 55 facing away from the bottom wall 121 of the box. The second connector 51 is disposed on the second part 56.

[0322] The second connector 51 includes a jack for the first connector 42 to be inserted into. Both the first connector 42 and the second connector 51 are located on the side of the battery cell component 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 component 20 along the first direction X. The first connector 42 and the second connector 51 are located between the battery cell component 20 and the battery monitoring module 50. 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 facing away from the bottom wall 121 along the second direction Y. 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 perpendicular to each other pairwise.

[0326] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0327] The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, wherein, Comprising: A battery cell assembly, the battery cell assembly including a plurality of battery cells arranged in a first direction; A signal acquisition assembly for acquiring information of the battery cells of the battery cell assembly, the signal acquisition assembly including a wire harness group and a first connector, the first connector being connected to one end of the wire harness group; A battery monitoring module provided with a second connector, the second connector being in plug-in fit with the first connector.

2. The battery device according to claim 1, wherein The battery monitoring module and the battery cell assembly are arranged in the first direction. 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 according to claim 2, wherein, Along the first direction, the second connector is provided on a side of the battery monitoring module facing the battery cell assembly.

4. The battery device according to claim 3, wherein, Along the first direction, at least a 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 a part of the orthographic projection of the first connector overlaps at least a part of the orthographic projection 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 according to claim 2, wherein, The battery device includes a box body, the battery cell assembly is accommodated in the box body, the box body includes a box bottom wall, the box bottom wall supports the battery cell assembly in a second direction, and the second direction intersects with the first direction; Along the second direction, the second connector is provided on a side of the battery monitoring module facing away from the box bottom wall.

7. The battery device according to claim 6, wherein, The battery cell includes a housing and an electrode assembly, the electrode assembly is accommodated in the housing, along the second direction, the housing has a first surface facing away from the box bottom wall, and the battery monitoring module does not extend beyond the first surface in a direction 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 according to any one of claims 1-8, wherein, The battery device includes a box body, the battery cell assembly is accommodated in the box body, the box body includes a box bottom wall, the box bottom wall supports the battery cell assembly in a second direction, the battery monitoring module is provided on the box bottom wall, and the second direction intersects with the first direction.

10. The battery device according to claim 9, wherein, The battery monitoring module and the battery cell assembly are arranged in the first direction, the wire harness group includes a main body area and a connection area, the main body area is provided 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 extends beyond a surface of the battery cell assembly facing the battery monitoring module in the first direction and is connected to the first connector.

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

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

13. The battery device according to claim 12, wherein, 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.

14. The battery device according to claim 12 or 13, wherein, Two of the locking members are correspondingly provided for each battery monitoring module, and the two locking members are arranged at intervals along the third direction, and both the first direction and the second direction intersect with the third direction.

15. The battery device according to any one of claims 9-14, wherein, 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 the second surface. The second part is connected to the second surface and protrudes from the second surface, and the second connector is disposed on the second part.

16. The battery device according to claim 15, wherein, Along the third direction, the second surface protrudes from both ends of the second part, and both the first direction and the second direction intersect with the third direction.

17. The battery device according to any one of claims 1 to 16, wherein, The battery device includes a plurality of the signal acquisition components, and the plurality of signal acquisition components are arranged along the third direction, and the third direction intersects with the first direction; Each battery monitoring module is correspondingly provided with at least one of the signal acquisition components.

18. The battery device according to claim 17, wherein, The battery device includes a plurality of the battery monitoring modules, and the plurality of battery monitoring modules are arranged along the third direction, and the first direction and the third direction intersect.

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

20. The battery device according to claim 18, wherein, At least one of the battery monitoring modules is provided with one of the second connectors, and one second connector is inserted and matched with the first connector of one of the signal acquisition components.

21. The battery device according to any one of claims 18-20, wherein, The at least one battery cell assembly includes a positive electrode conveying portion and a negative electrode conveying portion; The battery device further includes a box body, a first conductive structure and a second conductive structure. The battery cell assembly is disposed in the box body. The box body is provided with a positive electrode lead-out portion and a negative electrode lead-out portion. The positive electrode lead-out portion is connected to the positive electrode conveying portion through the first conductive structure, and the negative electrode lead-out portion is connected to the negative electrode conveying portion through the second conductive structure. An avoidance gap for the first conductive structure and the second conductive structure to pass through is formed between two adjacent battery monitoring modules.

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

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

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

26. The battery device according to any one of claims 1 to 25, wherein, The first connector includes a plugging portion and a connection terminal. The connection terminal is connected to the wire harness group, and both ends of the plugging portion are inserted and matched with the connection terminal and the second connector respectively.

27. The battery device according to any one of claims 1-26, wherein, The wire harness group includes an insulating board and a plurality of wires. A part of each wire is buried in the insulating board, and the other part of the wire is exposed outside the insulating board and connected to the first connector; The signal acquisition component includes a plurality of acquisition pieces, and each acquisition piece is connected to at least one of the wires.

28. The battery device according to any one of claims 1-26, wherein, The wire harness group includes an insulating layer and a plurality of wires, and each of the insulating layers covers the outer periphery of at least one of the wires; The signal acquisition component includes a plurality of acquisition elements. The two ends of the wire are respectively connected to the acquisition element and the first connector, and each acquisition element is connected to at least one of the wires.

29. The battery device according to any one of claims 1-28, wherein, The battery device includes a plurality of the battery cell components, and the plurality of battery cell components are arranged along a third direction. The first direction intersects the third direction, and one signal acquisition component is correspondingly arranged for each battery cell component.

30. An electrical device, wherein, It includes the battery device according to any one of claims 1-29.

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