Battery device and electrical device

Abstract

The present application discloses a battery device and an electrical device, belonging to the technical field of batteries. Among them, the battery device includes a box body, a battery cell assembly, an insulating spacer, and a conductive member; the box body includes a bottom wall; at least two battery cell assemblies are arranged in the box body and spaced along a first direction, and the bottom wall supports the battery cell assemblies along a second direction, the first direction being perpendicular to the second direction; along the first direction, the insulating spacer is arranged between two adjacent battery cell assemblies; the battery cell assembly includes at least one battery cell, and along the first direction, at least one electrode terminal of the battery cells in the battery cell assembly faces the insulating spacer; at least a part of the conductive member is arranged in the insulating spacer, and the conductive member is electrically connected to the output pole of the battery cell assembly. The technical solution provided by the present application can improve the energy density of the battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] In the development of battery technology, in addition to the reliability of the battery device during use, improving the volumetric energy density of the battery device is also an issue that needs to be considered.

[0004] Therefore, how to improve the volumetric energy density of the battery device is an urgent problem to be solved in battery technology. Summary of the Invention

[0005] Embodiments of the present application provide a battery device and an electrical device, which can improve the volumetric energy density of the battery device.

[0006] In a first aspect, an embodiment of the present application provides a battery device, including a box body, a battery cell assembly, an insulating spacer, and a conductive member; the box body includes a bottom wall; at least two battery cell assemblies are disposed in the box body and spaced apart along a first direction, the bottom wall supports the battery cell assemblies along a second direction, and the first direction is perpendicular to the second direction; along the first direction, the insulating spacer is disposed between two adjacent battery cell assemblies; the battery cell assembly includes at least one battery cell, and along the first direction, at least one electrode terminal of the battery cell in the battery cell assembly faces the insulating spacer; at least a part of the conductive member is disposed in the insulating spacer, and the conductive member is electrically connected to the output pole of the battery cell assembly.

[0007] In the above technical solution, the insulating spacer is arranged between two adjacent battery cell assemblies along the first direction. On the one hand, the insulating spacer can insulate the electrode terminals of the battery cells in two adjacent battery cell assemblies, so that two adjacent battery cell assemblies can have independent working spaces, reducing the risk of internal short circuit between two adjacent battery cell assemblies and improving the reliability of the battery device. On the other hand, compared with the case where no insulating spacer is arranged between two adjacent battery cell assemblies, the size of the isolation gap required between the electrode terminals of the battery cells in two adjacent battery cell assemblies is reduced, thereby improving the utilization rate of the space inside the box and facilitating the improvement of the energy density of the battery device. At the same time, at least part of the conductive member is arranged inside the insulating spacer. Thus, while satisfying the electrical connection between the conductive member and the electrical body of the battery cell assembly and the electrical device and the insulating spacer isolating two adjacent battery cell assemblies, the space occupied by the insulating spacer and the conductive member inside the box is reduced. Therefore, on the premise that the volume of the box remains unchanged, the space available for installing the battery cell assembly inside the box is increased, which is conducive to improving the energy density of the battery device.

[0008] In some embodiments, the battery device further includes structural beams; two structural beams are arranged inside the box and spaced along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other in pairs; wherein, the battery cell assembly is arranged between the two structural beams, the insulating spacer extends along the third direction, and two ends of the insulating spacer in the third direction are respectively connected to the two structural beams.

[0009] In the above technical solution, the battery cell assembly is arranged between the two structural beams, so that the two structural beams can provide a relatively stable working space for the battery cell assembly located between the two structural beams, thereby improving the reliability of the battery device; at the same time, two ends of the insulating spacer in the third direction are respectively connected to the two structural beams. On the one hand, when any one of the structural beams bears an external force, the component force in the third direction can be transmitted to the other structural member through the insulating spacer, thereby improving the structural strength of the structural beam. On the other hand, the two structural beams can respectively provide supporting forces to the two ends of the insulating spacer, thereby reducing the vibration amplitude of the insulating spacer when bearing an external force, so that the conductive member has a relatively stable working space, and thus the reliability of the battery device is improved.

[0010] In some embodiments, the structural beam has a first surface facing away from the bottom wall, and a part of the first surface is recessed to form a slot for inserting the insulating spacer.

[0011] In the above technical solution, a part of the first surface is recessed to form a slot for inserting the insulating spacer, that is, a part of the insulating spacer is disposed within the structural beam. Thus, while meeting the connection between the insulating spacer and the structural beam, on the one hand, the space occupied by the insulating spacer and the structural beam within the box body is reduced. Therefore, on the premise that the volume of the box body remains unchanged, the space available for installing the battery cell components within the box body is increased, which is conducive to improving the energy density of the battery device. On the other hand, compared with the case where the insulating spacer and the structural beam are stacked along the second direction, the space occupied by the insulating spacer and the structural beam in the second direction is reduced, which facilitates reducing the size of the box body in the second direction, and further reduces the size of the battery device in the second direction.

[0012] In some embodiments, at least one of the insulating spacer and the wall of the slot is formed with a snap, and the other is formed with a snap groove, and the snap cooperates with the snap groove to limit the insulating spacer from disengaging from the slot along the second direction.

[0013] In the above technical solution, at least one of the insulating spacer and the wall of the slot is formed with a snap, and the other is formed with a snap groove. The snap cooperates with the snap groove to limit the insulating spacer from disengaging from the slot along the second direction. By means of the cooperation between the snap and the snap groove, the insulating spacer is assembled and limited on the structural beam, with a simple structure and convenient assembly.

[0014] In some embodiments, the slot penetrates the structural beam along the third direction, and the insulating spacer passes through the slot.

[0015] In the above technical solution, the slot penetrates the structural beam along the third direction, and the insulating spacer passes through the slot, which facilitates the conductive member to pass through the structural beam along the third direction through the insulating spacer, and further facilitates the electrical connection between the conductive member and the battery cell components and the electrical body of the electrical device.

[0016] In some embodiments, the insulating spacer includes a first main body, and a part of the first main body is received in the slot; the interior of the first main body has a receiving cavity, and at least a part of the conductive member is received in the receiving cavity.

[0017] In the above technical solution, a part of the first main body is received in the slot, the interior of the first main body has a receiving cavity, and at least a part of the conductive member is received in the receiving cavity, reducing the space occupied by the first main body and the structural beam within the box body, and reducing the space occupied by the conductive member and the first main body within the box body. Thus, on the premise that the volume of the box body remains unchanged, the space available for installing the battery cell components within the box body is increased, which is conducive to improving the energy density of the battery device.

[0018] In some embodiments, the first body includes a first wall, a second wall, and a first connecting portion. The first wall and the second wall are spaced apart along the first direction, and an accommodation cavity is formed between the first wall and the second wall. The first connecting portion connects the first wall and the second wall.

[0019] In the above technical solution, the first wall and the second wall are spaced apart along the first direction to form an accommodation cavity between the first wall and the second wall. As a result, there is a first wall or a second wall between the part of the conductive member accommodated in the accommodation cavity and the battery cell assembly adjacent to it in the first direction. This enables the battery cell assembly and the conductive member to have independent working spaces, reducing the risk of interference between adjacent battery cell assemblies and conductive members and improving the reliability of the battery device. At the same time, the first connecting portion connects the first wall and the second wall, thereby increasing the integrity of the first main body and facilitating the installation of the insulating spacer.

[0020] In some embodiments, a first protrusion is provided on the side of the first wall facing the second wall, and the first protrusion abuts against the conductive member; and / or, a second protrusion is provided on the side of the second wall facing the first wall, and the second protrusion abuts against the conductive member.

[0021] In the above technical solution, the first protrusion and / or the second protrusion are used to contact the conductive member to restrict the movement of the conductive member when the conductive member is assembled and the battery device is in use. The structure is simple and easy to implement.

[0022] In some embodiments, the number of the conductive members is multiple, and the multiple conductive members are arranged along the second direction.

[0023] In the above technical solution, the number of the conductive members is multiple to facilitate the electrical connection of the two electrode ends of the control box and the current inflow end and the current outflow end of the electrical body of the electrical device respectively. The two conductive members are arranged along the second direction. As a result, compared with the case where the two conductive members are arranged along the first direction, the insulating spacer can accommodate the two conductive members on the premise of a smaller size in the first direction. This reduces the space occupied by the battery cell assembly and the insulating spacer in the first direction, thereby reducing the size of the electrical device in the first direction and making more reasonable use of the space inside the box in the second direction, which is beneficial to improving the energy density of the battery device.

[0024] In some embodiments, the number of the conductive members is two, and the first connecting portion divides the accommodation cavity into a first accommodation cavity and a second accommodation cavity arranged along the second direction, and the two conductive members are respectively accommodated in the first accommodation cavity and the second accommodation cavity.

[0025] In the above technical solution, the first connecting portion divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity arranged along the second direction, and the two conductive members are respectively accommodated in the first accommodating cavity and the second accommodating cavity. That is, the first connecting portion isolates the two conductive members, so that the two conductive members can have independent working spaces, reducing the risk of interference between adjacent two conductive members and improving the reliability of the battery device.

[0026] In some embodiments, a first opening is formed on a side of the first accommodating cavity facing away from the second accommodating cavity, and a second opening is formed on a side of the second accommodating cavity facing away from the first accommodating cavity.

[0027] In the above technical solution, the first accommodating cavity has a first opening, which facilitates inserting the conductive member into the first accommodating cavity through the first opening, and further facilitates the assembly of the conductive member in the first accommodating cavity; the second accommodating cavity has a second opening, which facilitates inserting the conductive member into the second accommodating cavity through the second opening, and further facilitates the assembly of the conductive member in the second accommodating cavity; at the same time, since the first opening is located on a side of the first accommodating cavity facing away from the second accommodating cavity, and the second opening is located on a side of the second accommodating cavity facing away from the first accommodating cavity, the first opening and the second opening are located on opposite sides of the first body, thus reducing the risk of interference between the two conductive members during the assembly of the two conductive members.

[0028] In some embodiments, the number of the conductive members is two, the first connecting portion connects one end of the first wall close to the bottom wall and one end of the second wall close to the bottom wall, and a third opening is formed on a side of the accommodating cavity facing away from the bottom wall.

[0029] In the above technical solution, a third opening is formed on a side of the accommodating cavity facing away from the bottom wall, which facilitates inserting the conductive member into the accommodating cavity through the third opening, thus facilitating the assembly of the conductive member in the accommodating cavity.

[0030] In some embodiments, a third protrusion is provided on the cavity wall of the accommodating cavity. Along the second direction, at least a part of the third protrusion is located between the two conductive members.

[0031] In the above technical solution, at least a part of the third protrusion is located between the two conductive members. When the two conductive members tend to move towards each other, the third protrusion can abut against them to limit the movement of the two conductive members towards each other, thus reducing the risk of interference between adjacent two conductive members and improving the reliability of the battery device.

[0032] In some embodiments, the first body further includes a third wall and a fourth wall. The third wall is connected to one end of the first wall away from the bottom wall, and the third wall overlaps the first surface; and / or, the fourth wall is connected to one end of the second wall away from the bottom wall, and the fourth wall overlaps the first surface.

[0033] In the above technical solution, the third wall overlaps the first surface; and / or, the fourth wall is connected to one end of the second wall away from the bottom wall, and the fourth wall overlaps the first surface, so that the structural beam can provide a supporting force to the first main body through the third wall and / or the fourth wall, and increase the contact area between the structural beam and the first main body, thereby improving the reliability of the connection between the first main body and the structural beam. On the one hand, when any structural beam bears an external force, the component force in the third direction can be more stably transmitted to another structural member through the first main body, thereby improving the structural strength of the structural beam; on the other hand, it can further reduce the vibration amplitude of the first main body when bearing an external force, so that the conductive member has a relatively stable working space, thereby improving the reliability of the battery device.

[0034] In some embodiments, the third wall is detachably connected to the structural beam; and / or, the fourth wall is detachably connected to the structural beam.

[0035] In the above technical solution, the third wall is detachably connected to the structural beam; and / or, the fourth wall is detachably connected to the structural beam, which facilitates the installation and disassembly of the first main body and the structural beam, and facilitates the assembly and maintenance of the battery device.

[0036] In some embodiments, the insulating spacer further includes a second main body. Along the second direction, one end of the second main body is connected to the first main body, and the other end of the second main body is connected to the bottom wall. A pressure relief mechanism is provided on the side of the battery cell facing the insulating spacer. In a plane perpendicular to the first direction, the orthographic projection of the second main body covers the orthographic projection of the pressure relief mechanism.

[0037] In the above technical solution, along the second direction, one end of the second main body is connected to the first main body, and the other end of the second main body is connected to the bottom wall, so that the bottom wall can provide a supporting force to the first main body through the second main body, and further reduce the vibration amplitude of the first main body when bearing an external force, so that the conductive member has a relatively stable working space, thereby improving the reliability of the battery device; in a plane perpendicular to the first direction, the orthographic projection of the second main body covers the orthographic projection of the pressure relief mechanism, so that when the battery cell has a thermal runaway and discharges emissions through the pressure relief mechanism to reduce the pressure and temperature inside the battery cell, the insulating spacer blocks the emissions to a certain extent to reduce the risk of the emissions falling on the battery cell disposed opposite to the battery cell having a thermal runaway in the first direction and causing the battery cell disposed opposite to the battery cell having a thermal runaway in the first direction to short-circuit, thereby improving the reliability of the battery device.

[0038] In some embodiments, the second body includes a blocking portion and a second connecting portion. Along the second direction, one end of the blocking portion is connected to the first body, the other end of the blocking portion is connected to the second connecting portion, the second connecting portion protrudes from a side surface of the blocking portion in the first direction, and the second connecting portion is connected to the bottom wall.

[0039] In the above technical solution, the second connecting portion protrudes from a side surface of the blocking portion in the first direction, and the second connecting portion is connected to the bottom wall. Thus, compared with the case where the blocking portion is directly connected to the bottom wall, the second connecting portion can increase the connection area between the second body and the bottom wall, thereby improving the connection strength between the second body and the bottom wall.

[0040] In some embodiments, there is a gap between the blocking portion and the pressure relief mechanism along the first direction.

[0041] In the above technical solution, there is a gap between the blocking portion and the pressure relief mechanism along the first direction. At the same time, since the second connecting portion is connected to the bottom wall, a channel is formed between the blocking portion, the bottom wall, and the battery cell assembly. The above channel can guide the high-temperature gas flowing out of the pressure relief mechanism along the second direction when the battery cell has a thermal runaway, so as to divert and divide the high-temperature gas, thereby being able to relieve the force of the high-temperature gas flowing out of the pressure relief mechanism, relieve the impact force of the high-temperature gas on the adjacent battery cell assembly, and is beneficial to reducing the transmission of thermal runaway to improve the reliability of the battery device.

[0042] In some embodiments, two ends of the second body in the third direction are respectively connected to two of the structural beams.

[0043] In the above technical solution, two ends of the second body in the third direction are respectively connected to two structural beams. Thus, compared with the case where only the first body is connected to the structural beam for the insulating spacer, the connection area between the insulating spacer and the structural beam is increased, thereby further improving the connection reliability between the insulating spacer and the structural beam.

[0044] In some embodiments, the battery cell assembly includes a plurality of battery cells arranged along the third direction. An electrode terminal is provided on a side of the battery cell facing the insulating spacer. A surface of the battery cell perpendicular to the third direction is the surface with the largest area of the battery cell. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0045] In the above technical solution, the battery cell assembly includes a plurality of battery cells arranged along the third direction. A surface of the battery cell perpendicular to the third direction is the surface with the largest area of the battery cell. Thus, when the battery cell expands, the adjacent battery cells in the third direction can mutually restrict the expansion of the battery cell in the third direction, thereby improving the reliability of the battery device.

[0046] In some embodiments, along the second direction, the insulating spacer and the conductive member do not protrude from the side of the battery cell assembly facing away from the bottom wall.

[0047] In the above technical solution, along the second direction, the insulating spacer and the conductive member do not protrude from the side of the battery cell assembly facing away from the bottom wall, so that the wall portion of the box body opposite to the bottom wall in the second direction does not need to be provided with an avoidance structure for avoiding the electrode terminals and the bus bar for connecting the electrode terminals, simplifying the structure of the box body and facilitating the manufacture of the box body.

[0048] In some embodiments, the insulating spacer is made of at least one of epoxy resin, polytetrafluoroethylene, and polyimide.

[0049] In the above technical solution, by making the insulating spacer with the above-mentioned materials, on the one hand, the insulating spacer can be made by injection molding in one piece, reducing the manufacturing cost of the insulating spacer; on the other hand, the insulating spacer has a certain insulation property, thereby reducing the risk of short circuit between the two battery assemblies.

[0050] In some embodiments, the battery device further includes a control box and a connector; the control box is disposed in the box body and is electrically connected to the battery cell assembly; the connector is disposed on the wall portion of the box body; wherein, the conductive member is used for electrically connecting the control box and the connector.

[0051] In the above technical solution, the conductive member is used for electrically connecting the control box and the connector, so that the power consumption body of the electrical device can be electrically connected to the battery device through the connector.

[0052] In a second aspect, an embodiment of the present application provides an electrical device, including the battery device according to any one of the embodiments in the first aspect, and the battery device is used to provide electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in 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, without creative efforts, other related drawings can also be obtained based on these drawings.

[0054] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0055] Figure 2 Exploded view of the structure of the battery device provided for some embodiments of the present application;

[0056] Figure 3 Schematic structural diagrams of an insulating spacer, a structural beam, and a conductive member provided in some embodiments of the present application;

[0057] Figure 4 For Figure 2 Cross-sectional view taken along A-A in

[0058] Figure 5 Cross-sectional view of a battery device provided in some embodiments of the present application;

[0059] Figure 6 Cross-sectional view of another battery device provided in some embodiments of the present application;

[0060] Figure 7 Schematic structural diagram of a battery cell provided in some embodiments of the present application.

[0061] Reference numerals: 1000 - vehicle; 100 - battery device; 10 - box body; 11 - first box body; 111 - bottom wall; 12 - second box body; 20 - battery cell assembly; 21 - battery cell; 211 - outer shell; 2111 - seventh wall; 212 - electrode terminal; 213 - pressure relief mechanism; 30 - insulating spacer; 31 - first main body; 310 - accommodating cavity; 310A - first accommodating cavity; 310B - second accommodating cavity; 31A - buckle; 311 - first wall; 3111 - first protrusion; 312 - second wall; 3121 - second protrusion; 313 - first connecting portion; 314 - third protrusion; 315 - third wall; 316 - fourth wall; 32 - second main body; 321 - blocking portion; 322 - second connecting portion; 40 - conductive member; 50 - structural beam; 51 - first surface; 52 - slot; 521 - clamping groove; 60 - control box; 70 - connector; 200 - controller; 300 - motor; X - first direction; Y - second direction; Z - third direction. Detailed implementation manners

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application in the specification 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 description and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description 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.

[0064] Reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appearing at 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.

[0065] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", and "attached to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships can exist. 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 this application generally represents an "or" relationship between the associated objects before and after.

[0067] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of this 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 this application.

[0068] The "plurality" mentioned in this application refers to two or more (including two).

[0069] In the embodiments of this application, the battery cell can be a secondary battery, and a secondary battery refers to a battery cell that can activate the active material through charging and continue to be used after the battery cell discharges.

[0070] 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.

[0071] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are inserted 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 the active ions to pass through.

[0072] In some embodiments, the positive electrode can be a positive electrode sheet, and the positive electrode sheet can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0073] 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.

[0074] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a 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 substrate 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.).

[0075] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0076] As an example, the negative electrode current collector can be a metal foil, a foam metal, or a composite current collector. For example, as a metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. can be used. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, etc. The composite current collector can include a polymer material substrate 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.).

[0077] 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.

[0078] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0079] In some embodiments, the battery apparatus may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0080] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0081] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0082] In some embodiments, the box body may be part of the chassis structure of a vehicle. For example, a part of the box body may become at least a part of the floor of the vehicle, or a part of the box body 10 may become at least a part of the cross beam and longitudinal beam of the vehicle.

[0083] In some embodiments, the battery may be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0084] In the following, it will mainly focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells, soft-pack battery cells or blade battery cells in some aspects.

[0085] The development of battery technology needs to consider multiple design factors at the same time. For example, performance parameters such as reliability, cycle life, discharge capacity, charge and discharge rate, etc. In addition, the energy density of the battery also needs to be considered.

[0086] In a conventional battery device, a conductive member and a battery cell assembly are provided in a box body. In some embodiments, the conductive member is used to electrically connect the current output end of the battery cell assembly and the main body of the electrical device. In some embodiments, the conductive member is used to electrically connect two main bodies of the electrical device. The battery cell assemblies are arranged in a plurality along a first direction, and the battery cell assembly includes at least one battery cell. Electrode terminals are provided on the opposite sides of the battery cells in two adjacent battery cell assemblies. In order to reduce the risk of short circuit between two adjacent battery cell assemblies caused by the abutment of the electrode terminals of the battery cells in the two adjacent battery cell assemblies, a relatively large gap is provided between the two adjacent battery cell assemblies. At the same time, in order to reduce the risk that components (such as battery cell assemblies) in the battery device collide with the conductive member and interfere with the operation of the conductive member when the battery device vibrates. The conductive member generally needs to be provided separately. Thereby additionally occupying the space inside the box body, and further reducing the space inside the box body that can be used to install the battery cell assembly. Thereby reducing the energy density of the battery device.

[0087] Based on the above considerations, in order to increase the space inside the box body that can be used to install the battery cell assembly, and thereby increase the energy density of the battery device. An embodiment of the present application provides a battery device, including a box body, a battery cell assembly, an insulating spacer, and a conductive member; the box body includes a bottom wall; at least two battery cell assemblies are arranged in the box body and spaced apart along a first direction, and the bottom wall supports the battery cell assembly along a second direction, the first direction being perpendicular to the second direction; along the first direction, the insulating spacer is arranged between two adjacent battery cell assemblies; the battery cell assembly includes at least one battery cell, and along the first direction, at least one electrode terminal of the battery cell in the battery cell assembly faces the insulating spacer; at least a part of the conductive member is arranged in the insulating spacer, and the conductive member electrically connects the output pole of the battery cell assembly.

[0088] In the battery device with such a structure, the insulating spacer is arranged along the first direction and is disposed between two adjacent battery cell assemblies. On the one hand, the insulating spacer can insulate the electrode terminals of the battery cells in the two adjacent battery cell assemblies, so that the two adjacent battery cell assemblies can have independent working spaces, reducing the risk of internal short circuit between the two adjacent battery cell assemblies and improving the reliability of the battery device. On the other hand, compared with the case where no insulating spacer is arranged between two adjacent battery cell assemblies, the size of the isolation gap required between the electrode terminals of the battery cells in the two adjacent battery cell assemblies is reduced, thereby improving the space utilization rate inside the box, which is conducive to increasing the energy density of the battery device. At the same time, at least part of the conductive member is arranged inside the insulating spacer, so that while satisfying the electrical connection between the conductive member and the power consumption body of the battery cell assembly and the electrical device, and satisfying the isolation of the two adjacent battery cell assemblies by the insulating spacer, the space occupied by the insulating spacer and the conductive member inside the box is reduced. Therefore, on the premise that the volume of the box remains unchanged, the space available for installing the battery cell assembly inside the box is increased, which is conducive to increasing the energy density of the battery device.

[0089] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using battery devices.

[0090] The electrical device includes but is not limited to: battery cars, electric vehicles, ships, spacecraft, etc. For example, spacecraft includes airplanes, rockets, space shuttles, spaceships, etc.

[0091] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical device in an embodiment of the present application for illustration.

[0092] For example, Figure 1 FIG. 14 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A motor 300, a controller 200, and a battery device 100 can be arranged inside the vehicle 1000. The controller 200 is used to control the power supply of the battery device 100 to the motor 300. For example, the battery device 100 can be arranged at the bottom, the front end, or the rear end of the vehicle 1000. The battery device 100 can be used for the power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000 and is used for the circuit system of the vehicle 1000, such as for the working power consumption requirements during the start, navigation, and operation of the vehicle 1000. In another embodiment 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.

[0093] To meet different power usage requirements, the battery device 100 may include a plurality of battery cells 21. Among them, the plurality of battery cells 21 may be connected in series, in parallel, or in a combination of series and parallel (mixed connection). The mixed connection refers to a combination of series and parallel connections. The battery device 100 may also be referred to as a battery pack. Optionally, the plurality of battery cells 21 may first be connected in series, in parallel, or in a mixed connection to form a battery cell assembly 20, and then a plurality of battery cell assemblies 20 may be connected in series, in parallel, or in a mixed connection to form the battery device 100. That is to say, the plurality of battery cells 21 may directly form the battery device 100, or may first form the battery cell assembly 20, and then the battery cell assembly 20 forms the battery device 100.

[0094] For example, please refer to Figure 2 , Figure 2 which is an exploded view of the structure of the battery device 100 according to some embodiments of the present application. The battery device 100 may include a plurality of battery cells 21. The battery device 100 may further include a box body 10. The interior of the box body 10 is a hollow structure, and the plurality of battery cells 21 are accommodated in the box body 10. As Figure 2 shown, here they are respectively referred to as the first box body 11 and the second box body 12, and the first box body 11 and the second box body 12 are snapped together. The shapes of the first box body 11 and the second box body 12 may be determined according to the shape of the combination of the plurality of battery cells 21. The first box body 11 and the second box body 12 may each have an open surface. For example, the first box body 11 and the second box body 12 may both be hollow cuboids and each have only one open surface. The open surfaces of the first box body 11 and the second box body 12 are arranged opposite to each other, and the first box body 11 and the second box body 12 are snapped together to form a box body 10 with a closed chamber. After the plurality of battery cells 21 are connected in parallel, in series, or in a mixed connection, they are placed in the box body 10 formed by snapping the first box body 11 and the second box body 12 together.

[0095] Optionally, the battery device 100 may further include other structures, which will not be elaborated here one by one. For example, the battery device 100 may further include a busbar component for realizing electrical connection between the plurality of battery cells 21, such as in parallel, in series, or in a mixed connection. Specifically, the busbar component may achieve electrical connection between the battery cells 21 by connecting the electrode terminals 212 (not shown in the figure) of the battery cells 21. Further, the busbar component may be fixed to the electrode terminals 212 (not shown in the figure) of the battery cells 21 by welding. The electrical energy of the plurality of battery cells 21 may further be led out through a conductive mechanism passing through the box body 10.

[0096] According to different power demands, the number of battery cells 21 can be set to any value. Multiple battery cells 21 can be connected in series, parallel, or a combination of both to achieve a larger capacity or power. Since the number of battery cells 21 included in each battery device 100 may be large, for ease of installation, the battery cells 21 can be grouped, and each group of battery cells 21 forms a battery cell assembly 20. The number of battery cells 21 included in the battery cell assembly 20 is not limited and can be set according to requirements. The battery device 100 can include multiple battery cell assemblies 20, and these battery cell assemblies 20 can be connected in series, parallel, or a combination of both.

[0097] Please refer to Figure 2 , and please refer to Figures 3 - 6 , Figure 3 FIG. is a schematic structural diagram of an insulation spacer 30, a structural beam 50, and a conductive member 40 provided in some embodiments of the present application. Figure 4 is Figure 2 a cross-sectional view taken along A-A in Figure 5 FIG. is a cross-sectional view of a battery device provided in some embodiments of the present application; Figure 6 FIG. is a cross-sectional view of another battery device provided in some embodiments of the present application. An embodiment of the present application provides a battery device 100, including a box body 10, a battery cell assembly 20, an insulation spacer 30, and a conductive member 40; the box body 10 includes a bottom wall 111; at least two battery cell assemblies 20 are disposed in the box body 10 and spaced apart along a first direction X, and the bottom wall 111 supports the battery cell assembly 20 along a second direction Y, and the first direction X is perpendicular to the second direction Y; along the first direction X, the insulation spacer 30 is disposed between two adjacent battery cell assemblies 20; the battery cell assembly 20 includes at least one battery cell 21, and along the first direction X, at least one electrode terminal 212 of the battery cell 21 in the battery cell assembly 20 faces the insulation spacer 30; at least a part of the conductive member 40 is disposed in the insulation spacer 30, and the conductive member 40 is electrically connected to an output terminal (not shown in the figure) of the battery cell assembly 20.

[0098] The box body 10 can be made of a metal material. Exemplarily, the box body 10 can be made of aluminum, aluminum alloy, or steel. It can be understood that when the box body 10 is made of steel, the box body 10 has good strength, which is beneficial to providing a stable and sealed working environment for the battery cell assembly 20 located in the box body 10. When the box body 10 is made of aluminum or aluminum alloy, the box body 10 has a certain deformation ability, can provide a buffering effect on the battery under impact and vibration conditions, and aluminum or aluminum alloy of the same volume is lighter than steel, which is beneficial to reducing the battery weight.

[0099] The first direction X can be parallel to the width of the box body 10, the second direction Y can be parallel to the height direction of the box body 10, and the third direction Z can be parallel to the length direction of the box body 10.

[0100] In some embodiments, the first box body 11 has a bottom wall 111, the bottom wall 111 is supported on the battery cell assembly 20 along the second direction Y, and an opening is provided on one side of the first box body 11 away from the bottom wall 111 in the second direction Y. The second box body 12 is connected to the first box body 11 and covers the opening.

[0101] The insulation spacer 30 is a structural member disposed between two adjacent battery cell assemblies 20 in the first direction X to separate the two adjacent battery cell assemblies 20.

[0102] The insulation spacer 30 can be integrally provided with the box body 10, or the insulation spacer 30 can be separately provided from the box body 10.

[0103] It can be understood that the insulation spacer 30 is made of an insulating material.

[0104] In some embodiments, the insulation spacer 30 can be made of a heat-melt material with insulating properties, so that the insulation spacer 30 can be manufactured by an extrusion molding method, which is convenient for the production and processing of the insulation spacer 30.

[0105] Exemplarily, the insulation spacer 30 is made of an insulating material, so that the insulation spacer 30 has insulation properties. While the insulation spacer 30 can isolate two adjacent battery cell assemblies 20, enabling the two adjacent battery cell assemblies 20 to have independent working spaces, the insulation spacer 30 can also provide insulation protection between the two adjacent battery cell assemblies 20, reducing the risk of short circuit of the battery cells 21 in the two adjacent battery cell assemblies 20 and improving the reliability of the battery device 100.

[0106] In some embodiments, the battery cell 21 includes a housing 211, an electrode terminal 212, and an electrode assembly. The housing 211 has a seventh wall 2111 facing the insulation spacer 30 along the first direction X. The electrode terminal 212 is disposed on the seventh wall 2111. The electrode assembly is accommodated in the housing 211 and is electrically connected to the electrode terminal 212.

[0107] It can be understood that the surface of the battery cell 21 perpendicular to the third direction Z is the surface with the largest area of the battery cell 21, that is, the surface of the battery cell 21 where the electrode terminal 212 is provided is not the largest surface of the battery cell 21, thereby reducing the space volume occupied by the electrode terminal 212.

[0108] In some embodiments, the insulating spacer 30 is made of an insulating material. Thus, the electrode terminal 212 of the battery cell 21 in the battery cell assembly 20 is arranged on the side facing the insulating spacer 30. On the one hand, the buffer space between the battery cell assembly 20 and the insulating spacer 30 in the first direction X can be reasonably utilized. On the other hand, since the insulating spacer 30 can insulate adjacent battery cells 21 while isolating adjacent battery cell assemblies 20, the distance between the electrode terminal 212 and the insulating spacer 30 can be minimized as much as possible. Furthermore, the occupation of the space inside the box body 10 by the electrode terminal 212 can be reduced, and the space inside the box body 10 can be reasonably utilized, thereby improving the energy density of the battery device 100.

[0109] It can be understood that the electrode terminal 212 is arranged on the side of the battery cell 21 facing the insulating spacer 30, that is, on the side of the battery cell 21 that does not face away from the bottom wall 111. Thus, there is no need to provide an avoidance structure opposite to the electrode terminal 212 on the wall portion of the box body 10 arranged opposite to the bottom wall 111 in the second direction Y. As a result, the wall portion of the box body 10 arranged opposite to the bottom wall 111 in the second direction Y can have a certain flatness. Thus, when the battery device 100 is applied to an electric device, taking the vehicle 1000 or a transport device with the battery device 100 arranged on the chassis as an example, the chassis provided with the battery device 100 can be arranged without an avoidance structure for the box body 10. Furthermore, the chassis of the electric device can have a certain flatness, thereby improving the comfort of passengers. At the same time, since the electrode terminal 212 is arranged on the side of the battery cell 21 facing the insulating spacer 30, compared with the case where the electrode terminal 212 is arranged on the side of the battery cell 21 facing away from the bottom wall 111, there is no need to provide an avoidance structure for the electrode terminal 212 and the bus bar connecting the electrode terminals 212 on the wall portion of the box body 10 arranged opposite to the bottom wall 111 in the second direction Y, simplifying the structure of the box body 10 and facilitating the manufacture of the box body 10.

[0110] In some embodiments, the battery cell 21 has two electrode terminals 212 with opposite polarities. One electrode terminal 212 is arranged on the side of the battery cell 21 facing the insulating spacer 30, and the other electrode terminal 212 is arranged on the side of the battery cell 21 facing away from the insulating spacer 30.

[0111] In some embodiments, the battery cell 21 has two electrode terminals 212 with opposite polarities. Two electrode terminals 212 are arranged on the side of the battery cell 21 facing the insulating spacer 30, and the two electrode terminals 212 are arranged at intervals in the second direction Y.

[0112] The conductive member 40 is a structural member used to guide current in the battery device 100. It can be understood that the conductive member 40 is made of conductive material. Exemplarily, the conductive member 40 may be surrounded by insulating material to insulate and isolate the conductive member 40 from other structural members of the battery device 100.

[0113] In some embodiments, the conductive member 40 is used to electrically connect the output end of the battery cell assembly 20 and the input end of the power-consuming body of the power-consuming device.

[0114] In some embodiments, the electrical device having the battery device 100 has two electrical bodies, which are located on both sides of the battery device 100 in the third direction Z. The conductive member 40 passes through the box 10 and is used to electrically connect the two electrical bodies.

[0115] It should be noted that the power-consuming body is the part of the power-consuming device that needs to be driven by electric energy. An installation space for installing the battery device 100 can be set on the power-consuming body, and a to-be-connected component can be set on the power-consuming body.

[0116] The output pole is used to conduct the electrical energy of the battery cells 21 in the battery cell assembly 20 .

[0117] “The conductive member 40 is electrically connected to the output electrode of the battery cell assembly 20 ” may refer to that one end of the conductive member 40 is directly connected to the output electrode, or may refer to that one end of the conductive member 40 is indirectly connected to the output electrode through other structural members.

[0118] “At least a portion of the conductive member 40 is disposed in the insulating isolation member 30 ” can be understood as that a portion of the conductive member 40 is disposed in the insulating isolation member 30 ; or, the entire conductive member 40 is disposed in the insulating isolation member 30 .

[0119] In this embodiment, the insulating spacer 30 is arranged between two adjacent battery cell assemblies 20 along the first direction X. On the one hand, the insulating spacer 30 can insulate the electrode terminals 212 of the battery cells 21 in two adjacent battery cell assemblies 20, so that two adjacent battery cell assemblies 20 can have independent working spaces, reducing the risk of internal short circuit between two adjacent battery cell assemblies 20 and improving the reliability of the battery device 100. On the other hand, compared with the case where no insulating spacer 30 is arranged between two adjacent battery cell assemblies 20, the size of the isolation gap required between the electrode terminals 212 of the battery cells 21 in two adjacent battery cell assemblies 20 is reduced, thereby improving the space utilization rate inside the box body 10 and further facilitating the improvement of the energy density of the battery device 100. At the same time, at least part of the conductive member 40 is arranged inside the insulating spacer 30, so that while the conductive member 40 electrically connects the battery cell assembly 20 and the electrical body of the electrical device and the insulating spacer 30 isolates two adjacent battery cell assemblies 20, the space occupied by the insulating spacer 30 and the conductive member 40 inside the box body 10 is reduced. Therefore, on the premise that the volume of the box body 10 remains unchanged, the space available for installing the battery cell assembly 20 inside the box body 10 is increased, which further facilitates the improvement of the energy density of the battery device 100.

[0120] According to some embodiments of the present application, please refer to Figure 2 and Figure 3 , Figure 2 is an exploded view of the structure of the battery device 100 provided by some embodiments of the present application, Figure 3 is a schematic structural diagram of the insulating spacer 30, the structural beam 50 and the conductive member 40 provided by some embodiments of the present application. The battery device 100 further includes a structural beam 50; two structural beams 50 are arranged inside the box body 10 and are spaced apart along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs; wherein, the battery cell assembly 20 is arranged between two structural beams 50, the insulating spacer 30 extends along the third direction Z, and both ends of the insulating spacer 30 in the third direction Z are respectively connected to the two structural beams 50.

[0121] The structural beam 50 is a structural member arranged inside the box body 10. Exemplarily, the structural beam 50 can be made of a metal material.

[0122] In some embodiments, the structural beam 50 is connected to the bottom wall 111 of the first box body 11, and both ends of the box body 10 in the first direction X are respectively connected to the wall portions of the first box body 11 that are oppositely arranged in the first direction X. To increase the structural strength of the first box body 11.

[0123] In some embodiments, two end battery cells 21 located at both ends of the battery cell assembly 20 in the third direction Z are respectively in contact with two structural beams 50, so that the structural beams 50 can limit the expansion of the battery cells 21 in the battery cell assembly 20 along the second direction Y.

[0124] In this embodiment, the battery cell assembly 20 is disposed between two structural beams 50, so that the two structural beams 50 can provide a relatively stable working space for the battery cell assembly 20 located between the two structural beams 50, thereby improving the reliability of the battery device 100; at the same time, both ends of the insulation spacer 30 in the third direction Z are respectively connected to the two structural beams 50. On the one hand, when any one of the structural beams 50 bears an external force, the component force in the third direction Z can be transmitted to the other structural member through the insulation spacer 30, thereby improving the structural strength of the structural beam 50; on the other hand, the two structural beams 50 can respectively provide supporting forces to both ends of the insulation spacer 30, thereby reducing the vibration amplitude of the insulation spacer 30 when bearing an external force, so that the conductive member 40 has a relatively stable working space, thereby improving the reliability of the battery device 100.

[0125] According to some embodiments of the present application, please refer to Figure 3 and Figure 4 , the structural beam 50 has a first surface 51 facing away from the bottom wall 111, and a part of the first surface 51 is recessed to form a slot 52 for inserting the insulation spacer 30.

[0126] The first surface 51 is the side surface of the structural beam 50 away from the bottom wall 111 in the second direction Y. Exemplarily, the first surface 51 can be a plane.

[0127] The slot 52 is a groove-like structure formed by the first surface 51 recessing towards the bottom wall 111. Exemplarily, the slot 52 can be integrally formed with the structural beam 50 by stamping or the like, or the slot 52 can be formed on the first surface 51 of the structural beam 50 by turning processing.

[0128] Specifically, the first surface 51 is recessed to form the slot 52, and the insulation spacer 30 is inserted into the slot 52, that is, a part of the insulation spacer 30 is accommodated in the slot 52 along the second direction Y, so that the insulation spacer 30 and the structural beam 50 share at least part of the space in the second direction Y.

[0129] In this embodiment, a part of the first surface 51 is recessed to form a slot 52 for inserting the insulation spacer 30, that is, a part of the insulation spacer 30 is disposed within the structural beam 50. Thus, while satisfying the connection between the insulation spacer 30 and the structural beam 50, on the one hand, the space occupied by the insulation spacer 30 and the structural beam 50 within the box body 10 is reduced. Therefore, on the premise that the volume of the box body 10 remains unchanged, the space available for installing the battery cell assembly 20 within the box body 10 is increased, which is conducive to improving the energy density of the battery device 100. On the other hand, compared with the case where the insulation spacer 30 and the structural beam 50 are stacked along the second direction Y, the space occupied by the insulation spacer 30 and the structural beam 50 in the second direction Y is reduced, which is convenient for reducing the size of the box body 10 in the second direction Y, and further reducing the size of the battery device 100 in the second direction Y.

[0130] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , at least one of the insulation spacer 30 and the wall portion of the slot 52 is formed with a buckle 31A, and the other is formed with a clamping groove 521. The buckle 31A cooperates with the clamping groove 521 to limit the insulation spacer 30 from disengaging from the slot 52 along the second direction Y.

[0131] In some embodiments, at least one side of the insulation spacer 30 along the first direction X is formed with a buckle 31A, and a clamping groove 521 is formed on the groove wall surface of the slot 52. The buckle 31A cooperates with the clamping groove 521 to limit the insulation spacer 30 from disengaging from the slot 52 along the second direction Y.

[0132] In some embodiments, at least one groove wall surface of the slot 52 is formed with a buckle 31A, and at least one side of the insulation spacer 30 along the first direction X is formed with a clamping groove 521. The buckle 31A cooperates with the clamping groove 521 to limit the insulation spacer 30 from disengaging from the slot 52 along the second direction Y.

[0133] "At least one side of the insulation spacer 30 along the first direction X is formed with a buckle 31A" can be understood as that the insulation spacer 30 is formed with a buckle 31A on one side in the first direction X, or the insulation spacer 30 has buckles 31A on both opposite sides in the first direction X.

[0134] Exemplarily, the groove wall of the slot 52 is recessed along the first direction X to form the clamping groove 521. It can be understood that the clamping groove 521 is correspondingly arranged with the buckle 31A.

[0135] In this embodiment, at least one of the insulating spacer 30 and the wall of the slot 52 is formed with a snap 31A, and the other is formed with a snap groove 521. The snap 31A cooperates with the snap groove 521 to limit the insulating spacer 30 from disengaging from the slot 52 in the second direction Y. In this way, the insulating spacer 30 is assembled and limited on the structural beam 50 by the cooperation of the snap 31A and the snap groove 521, which has a simple structure and is convenient for assembly.

[0136] According to some embodiments of the present application, please refer to Figure 4 , the slot 52 penetrates the structural beam 50 in the third direction Z, and the insulating spacer 30 passes through the slot 52.

[0137] The slot 52 penetrates the structural beam 50 in the third direction Z, that is, the two ends of the slot 52 in the third direction Z are respectively connected to the two opposite sides of the structural beam 50 in the third direction Z.

[0138] In some embodiments, the battery device 100 further includes a control box 60 and a connector 70; the control box 60 is disposed in the box body 10 and is electrically connected to the battery cell assembly 20; the connector 70 is disposed on the wall of the box body 10, and the control box 60 and the connector 70 are respectively located on the opposite sides of the two structural beams 50 in the third direction Z. The conductive member 40 is received in the insulating spacer 30 and passes through the slot 52, so that the opposite ends of the conductive member 40 can be respectively connected to the control box 60 and the connector 70.

[0139] In some embodiments, the electrical device having the battery device 100 has two electrical bodies, and the two electrical bodies are located on both sides of the battery device 100 in the third direction Z. The conductive member 40 is received in the insulating spacer 30 and passes through the slot 52, so that the opposite ends of the conductive member 40 can respectively pass through the two opposite walls of the box body 10 in the third direction Z and be electrically connected to the two electrical bodies respectively.

[0140] In this embodiment, the slot 52 penetrates the structural beam 50 in the third direction Z, and the insulating spacer 30 passes through the slot 52, so that it is convenient for the conductive member 40 to pass through the structural beam 50 in the third direction Z through the insulating spacer 30, and further convenient for the conductive member 40 to electrically connect the battery cell assembly 20 and the electrical body of the electrical device.

[0141] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the insulating spacer 30 includes a first main body 31, and a part of the first main body 31 is received in the slot 52; the inside of the first main body 31 has a receiving cavity 310, and the conductive member 40 is at least partially received in the receiving cavity 310.

[0142] The first main body 31 is the part of the insulating spacer 30 for receiving the conductive member 40.

[0143] The receiving cavity 310 is a cavity structure in the first body 31 for receiving the conductive member 40. Exemplarily, the length direction of the receiving cavity 310 may extend along the third direction Z.

[0144] In some embodiments, in a plane perpendicular to the third direction Z, the orthographic projection of the slot 52 covers the orthographic projection of the conductive member 40. Since a part of the first body 31 is received in the slot 52 and the conductive member 40 is at least partially received in the receiving cavity 310, the first body 31 is provided between at least a part of the circumferential side of the part of the conductive member 40 located in the slot 52 and the slot wall of the slot 52. Thus, compared with the case where the conductive member 40 is directly inserted into the slot 52, when the insulating spacer 30 shakes under an external force, the first body 31 can limit the conductive member 40 from abutting against the edge of the slot 52 and relatively sliding, thereby reducing the risk of the conductive member 40 being worn and causing a short circuit inside the battery device 100.

[0145] In some embodiments, an opening for inserting the conductive member 40 into the receiving cavity 310 may be provided on one side of the receiving cavity 310 in the first direction X.

[0146] In this embodiment, a part of the first body 31 is received in the slot 52, the inside of the first body 31 has the receiving cavity 310, and the conductive member 40 is at least partially received in the receiving cavity 310, reducing the space occupied by the first body 31 and the structural beam 50 in the box body 10, and reducing the space occupied by the conductive member 40 and the first body 31 in the box body 10. Thus, on the premise that the volume of the box body 10 remains unchanged, the space available for installing the battery cell assembly 20 in the box body 10 is increased, which is beneficial to improving the energy density of the battery device 100. Especially when a part of the conductive member 40 is received in the slot 52, the space occupied by the conductive member 40, the first body 31 and the structural beam 50 in the box body 10 can be further reduced, which is more conducive to improving the energy density of the battery device 100.

[0147] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the first body 31 includes a first wall 311, a second wall 312 and a first connecting portion 313. The first wall 311 and the second wall 312 are spaced apart along the first direction X, a receiving cavity 310 is formed between the first wall 311 and the second wall 312, and the first connecting portion 313 connects the first wall 311 and the second wall 312.

[0148] The first wall 311 and the second wall 312 are the wall parts of the first main body 31 that are respectively close to two adjacent battery cell components 20 in the first direction X. Exemplarily, the first wall 311 is parallel to the second wall 312, and the thickness direction of the first wall 311 is parallel to the first direction X. A part of the first wall 311 can be received in the slot 52, and a part of the second wall 312 can be received in the slot 52.

[0149] In some embodiments, the first wall 311 and the second wall 312 are in interference fit with the conductive member 40. Thus, during the assembly and use of the conductive member 40, an extrusion force is provided to the conductive member 40 by the first wall 311 and the second wall 312, and a frictional force is provided when the conductive member 40 has a tendency to move relative to the first main body 31, thereby restricting the movement of the conductive member 40 relative to the first main body 31, and thus reducing the risk of the conductive member 40 leaving the accommodation cavity 310.

[0150] In some embodiments, there are two snap fasteners 31A, which are respectively located on the outer surfaces of the first wall 311 and the second wall 312. The snap fastener 31A is provided with a guiding surface on the side facing away from the first surface 51. The guiding surface abuts against the notch of the slot 52 and moves towards the bottom of the slot 52 to guide the first wall 311 and the second wall 312 to move towards each other.

[0151] The first connecting portion 313 is the part of the first main body 31 for connecting the first wall 311 and the second wall 312.

[0152] In some embodiments, the two ends of the first connecting portion 313 in the third direction Z are respectively flush with the two ends of the first wall 311 portion in the third direction Z, and the two ends of the first connecting portion 313 in the third direction Z are respectively flush with the two ends of the second wall 312 portion in the third direction Z. So that the first connecting portion 313 has sufficient connection areas with the first wall 311 and the second wall 312 respectively, thereby enhancing the connection strength between the first connecting portion 313 and the first wall 311, and enhancing the connection strength between the first connecting portion 313 and the second wall 312.

[0153] In some embodiments, the first connecting portion 313 connects one end of the first wall 311 away from the bottom wall 111 and one end of the second wall 312 away from the bottom wall 111.

[0154] In this embodiment, the first wall 311 and the second wall 312 are spaced apart in the first direction X to form a receiving cavity 310 between the first wall 311 and the second wall 312. As a result, a part of the conductive member 40 received in the receiving cavity 310 has the first wall 311 or the second wall 312 between it and the battery cell assembly 20 adjacent to it in the first direction X. Thus, the battery cell assembly 20 and the conductive member 40 can have independent working spaces, reducing the risk of interference between the adjacent battery cell assembly 20 and the conductive member 40 and improving the reliability of the battery device 100. At the same time, the first connecting portion 313 connects the first wall 311 and the second wall 312, thereby increasing the integrity of the first main body 31 and facilitating the installation of the insulating spacer 30.

[0155] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , on a side of the first wall 311 facing the second wall 312, a first protrusion 3111 is provided, and the first protrusion 3111 abuts against the conductive member 40; and / or, on a side of the second wall 312 facing the first wall 311, a second protrusion 3121 is provided, and the second protrusion 3121 abuts against the conductive member 40.

[0156] "On a side of the first wall 311 facing the second wall 312, a first protrusion 3111 is provided" can be understood as that on a surface of the first wall 311 facing the second wall 312 in the first direction X, a first protrusion 3111 protruding from this surface in the first direction X is provided.

[0157] "On a side of the second wall 312 facing the first wall 311, a second protrusion 3121 is provided" can be understood as that on a surface of the second wall 312 facing the first wall 311 in the first direction X, a second protrusion 3121 protruding from this surface in the first direction X is provided.

[0158] In some embodiments, the first protrusion 3111 and the second protrusion 3121 are in interference fit with the conductive member 40. It can be understood that the first protrusion 3111 and the second protrusion 3121 are in contact with the conductive member 40, so that during the assembly and use of the conductive member 40, the first protrusion 3111 and the second protrusion 3121 are in interference fit with the conductive member 40 to limit the movement of the conductive member 40. At the same time, the first protrusion 3111 drives part of the first wall 311 to deform, and the second protrusion 3121 drives part of the second wall 312 to deform, thereby reducing the area of the side wall deformation when the first wall 311 and the second wall 312 are in interference fit with the conductive member 40. On the one hand, the risk of cracking of the first wall 311 and the second wall 312 is reduced; on the other hand, the reaction force provided by the deformation of the first wall 311 and the second wall 312 during the assembly of the conductive member 40 and the insulating spacer 30 is reduced, thus facilitating the assembly of the conductive member 40 and the insulating member.

[0159] Exemplarily, the first protrusion 3111 may be in point contact, line contact or surface contact with the conductive member 40, and / or the second protrusion 3121 may be in point contact, line contact or surface contact with the conductive member 40.

[0160] In some embodiments, the first protrusions 3111 are multiple and arranged at intervals along the second direction Y, and / or the second protrusions 3121 are multiple and arranged at intervals along the second direction Y.

[0161] In this embodiment, the first protrusion 3111 and / or the second protrusion 3121 are used to contact the conductive member 40, so as to limit the movement of the conductive member 40 when the conductive member 40 and the battery device 100 are assembled and in use. The structure is simple and easy to implement.

[0162] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the number of the conductive members 40 is multiple, and the multiple conductive members 40 are arranged along the second direction Y.

[0163] In some embodiments, one end of each of the two conductive members 40 is respectively connected to the current output end of the control box 60 and the current input end of the electrical appliance body, and the other end of each of the two conductive members 40 is respectively connected to the current input end of the control box 60 and the current output end of the electrical appliance body, so as to form a loop between the control box 60 and the electrical appliance body.

[0164] In this embodiment, the number of the conductive members 40 is multiple, so as to facilitate the electrical connection of the two electrode ends of the control box 60 and the current inflow end and the current outflow end of the electrical appliance body of the electrical device respectively; the two conductive members 40 are arranged along the second direction Y. Therefore, compared with the case where the two conductive members 40 are arranged along the first direction X, the insulating spacer 30 can accommodate the two conductive members 40 on the premise that the size in the first direction X is smaller, thereby reducing the space occupied by the battery cell assembly 20 and the insulating spacer 30 in the first direction X, further reducing the size of the electrical device in the first direction X, and more reasonably utilizing the space in the second direction Y inside the box body 10, which is beneficial to improving the energy density of the battery device 100.

[0165] According to some embodiments of the present application, please refer to Figure 5 , the number of the conductive members 40 is two, the first connecting portion 313 divides the accommodating cavity 310 into a first accommodating cavity 310A and a second accommodating cavity 310B arranged along the second direction Y, and the two conductive members 40 are respectively accommodated in the first accommodating cavity 310A and the second accommodating cavity 310B.

[0166] In some embodiments, the first connecting portion 313 is disposed between two conductive members 40 along the second direction Y. The two ends of the first connecting portion 313 in the third direction Z are flush with the two ends of the first wall portion 311 in the third direction Z respectively, and the two ends of the first connecting portion 313 in the third direction Z are flush with the two ends of the second wall portion 312 in the third direction Z respectively, so as to form an independent first accommodation cavity 310A and a second accommodation cavity 310B. Wherein, a first accommodation cavity 310A is formed by enclosing the side of the first connecting portion 313 facing away from the bottom wall 111, a part of the inner surface of the first wall 311 and a part of the inner surface of the second wall 312; a first accommodation cavity 310A is formed by enclosing the side of the first connecting portion 313 facing the bottom wall 111, a part of the inner surface of the first wall 311 and a part of the inner surface of the second wall 312.

[0167] In some embodiments, the connecting member is made of an insulating material to insulate and isolate the two conductive members 40, thereby improving the reliability of the battery.

[0168] In this embodiment, the first connecting portion 313 divides the accommodation cavity 310 into a first accommodation cavity 310A and a second accommodation cavity 310B arranged along the second direction Y. The two conductive members 40 are respectively accommodated in the first accommodation cavity 310A and the second accommodation cavity 310B. That is, the first connecting portion 313 isolates the two conductive members 40, so that the two conductive members 40 can have independent working spaces, reducing the risk of interference between adjacent two conductive members 40 and improving the reliability of the battery device 100.

[0169] According to some embodiments of the present application, please refer to Figure 5 , a first opening is formed on the side of the first accommodation cavity 310A facing away from the second accommodation cavity 310B, and a second opening is formed on the side of the second accommodation cavity 310B facing away from the first accommodation cavity 310A.

[0170] In some embodiments, the first accommodation cavity 310A is in a groove shape penetrating the first main body 31 along the third direction Z, and the first opening is the notch of the first accommodation cavity 310A, and / or, the second accommodation cavity 310B is in a groove shape penetrating the first main body 31 along the third direction Z, and the second opening is the notch of the second accommodation cavity 310B.

[0171] In this embodiment, the first receiving cavity 310A has a first opening, facilitating the insertion of the conductive member 40 into the first receiving cavity 310A through the first opening, and thus facilitating the assembly of the conductive member 40 within the first receiving cavity 310A; the second receiving cavity 310B has a second opening, facilitating the insertion of the conductive member 40 into the second receiving cavity 310B through the second opening, and thus facilitating the assembly of the conductive member 40 within the second receiving cavity 310B; meanwhile, since the first opening is located on the side of the first receiving cavity 310A facing away from the second receiving cavity 310B, and the second opening is located on the side of the second receiving cavity 310B facing away from the first receiving cavity 310A, the first opening and the second opening are located on opposite sides of the first body 31, thereby reducing the risk of interference between the two conductive members 40 during the assembly of the two conductive members 40.

[0172] According to some embodiments of the present application, please refer to Figure 6 , the number of conductive members 40 is two, the first connecting portion 313 connects one end of the first wall 311 close to the bottom wall 111 and one end of the second wall 312 close to the bottom wall 111, and a third opening is formed on the side of the receiving cavity 310 facing away from the bottom wall 111.

[0173] In the embodiment where the bottom wall 111 is disposed on the first box body 11, a third opening is formed on the side of the receiving cavity 310 facing away from the bottom wall 111 such that the third opening faces the opening of the first box body 11, thereby facilitating the operator to insert the conductive member 40 into the receiving cavity 310 through the opening of the first box body 11 and through the third opening.

[0174] In some embodiments, the receiving cavity 310 is in a groove shape extending through the first body 31 along the third direction Z, and the third opening is the notch of the receiving cavity 310.

[0175] In this embodiment, a third opening is formed on the side of the receiving cavity 310 facing away from the bottom wall 111, facilitating the insertion of the conductive member 40 into the receiving cavity 310 through the third opening, and thus facilitating the assembly of the conductive member 40 within the receiving cavity 310.

[0176] According to some embodiments of the present application, please refer to Figure 6 , a third protrusion 314 is provided on the cavity wall of the receiving cavity 310, and along the second direction Y, the third protrusion 314 is at least partially located between the two conductive members 40.

[0177] In some embodiments, a third protrusion 314 protruding from the surface along the first direction X is provided on the surface of the first wall 311 facing the second wall 312 in the first direction X, and / or a third protrusion 314 protruding from the surface along the first direction X is provided on the surface of the second wall 312 facing the first wall 311 in the first direction X.

[0178] "The third protrusion 314 is at least partially located between the two conductive members 40" can be understood as that a part of the third protrusion is located between the two conductive members 40, or the whole of the third protrusion is located between the two conductive members 40.

[0179] Specifically, when the two conductive members 40 tend to move towards each other in the second direction Y, the third protrusion abuts against the conductive members 40 to limit the relative movement of the two conductive members 40.

[0180] In this embodiment, the third protrusion 314 is at least partially located between the two conductive members 40. Thus, when the two conductive members 40 tend to move towards each other, the third protrusion 314 can abut against them to limit the relative movement of the two conductive members 40, thereby reducing the risk of interference between adjacent two conductive members 40 and improving the reliability of the battery device 100.

[0181] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the first main body 31 further includes a third wall 315 and a fourth wall 316. The third wall 315 is connected to one end of the first wall 311 away from the bottom wall 111, and the third wall 315 overlaps the first surface 51; and / or, the fourth wall 316 is connected to one end of the second wall 312 away from the bottom wall 111, and the fourth wall 316 overlaps the first surface 51.

[0182] The third wall 315 and the fourth wall 316 are the parts of the first main body 31 that overlap the first surface 51.

[0183] In some embodiments, the thickness direction of the third wall 315 is parallel to the second direction Y, and / or the thickness direction of the fourth wall 316 is parallel to the second direction Y. On the one hand, the overlapping area between the third wall 315 and / or the fourth wall 316 and the first surface 51 is increased, thereby enhancing the connection strength between the first main body 31 and the structural beam 50; on the other hand, the size of the part of the third wall 315 and the third wall 315 protruding from the first surface 51 in the second direction Y is reduced, thereby reducing the size of the structural beam 50 and the first main body 31 in the second direction Y.

[0184] In some embodiments, the third wall 315 is connected to the first surface 51 by means of gluing, foam support, etc., and / or the fourth wall 316 is connected to the first surface 51 by means of gluing, foam support, etc.

[0185] In some embodiments, the third wall 315 is connected to the second box body 12 by means of bolt fastening, gluing, foam support, etc., and / or the fourth wall 316 is connected to the second box body 12 by means of bolt fastening, gluing, foam support, etc. to provide a supporting force to the second box body 10, thereby enhancing the structural strength of the box body 10.

[0186] In this embodiment, the third wall 315 overlaps the first surface 51; and / or, the fourth wall 316 is connected to one end of the second wall 312 away from the bottom wall 111, and the fourth wall 316 overlaps the first surface 51, so that the structural beam 50 can provide a supporting force to the first body 31 through the third wall 315 and / or the fourth wall 316, and increase the contact area between the structural beam and the first body 31, thereby improving the reliability of the connection between the first body 31 and the structural beam 50. On the one hand, when any structural beam 50 bears an external force, the component force in the third direction Z can be more stably transmitted to another structural member through the first body 31, thereby improving the structural strength of the structural beam 50; on the other hand, it can further reduce the vibration amplitude of the first body 31 when bearing an external force, so that the conductive member 40 has a relatively stable working space, thereby improving the reliability of the battery device 100.

[0187] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the third wall 315 is detachably connected to the structural beam 50; and / or, the fourth wall 316 is detachably connected to the structural beam 50.

[0188] Exemplarily, the third wall 315 and the structural beam 50 are detachably connected by, but not limited to, methods such as pin connection, snap 31A connection, and flange connection; the fourth wall 316 and the structural beam 50 are detachably connected by, but not limited to, methods such as pin connection, snap 31A connection, and flange connection.

[0189] In some embodiments, the battery device 100 further includes a fastener. A first through hole penetrating the third wall 315 in the second direction Y is provided on the third wall 315, and a first threaded hole corresponding to the first through hole is provided on the first surface 51. One end of the fastener passes through the first through hole and is threadedly engaged with the first threaded hole, and the other end of the fastener presses the third wall 315 against the first surface 51 in the second direction Y; and / or, a second through hole penetrating the fourth wall 316 in the second direction Y is provided on the fourth wall 316, and a second threaded hole corresponding to the second through hole is provided on the first surface 51. One end of the fastener passes through the second through hole and is threadedly engaged with the second threaded hole, and the other end of the fastener presses the fourth wall 316 against the first surface 51 in the second direction Y. It should be noted that the fastener can be a bolt.

[0190] In this embodiment, the third wall 315 is detachably connected to the structural beam 50; and / or, the fourth wall 316 is detachably connected to the structural beam 50, which facilitates the installation and disassembly of the first body 31 and the structural beam 50, and facilitates the assembly and maintenance of the battery device 100.

[0191] According to some embodiments of the present application, please refer to Figure 6, the insulating spacer 30 further includes a second main body 32. Along the second direction Y, one end of the second main body 32 is connected to the first main body 31, and the other end of the second main body 32 is connected to the bottom wall 111. A pressure relief mechanism 213 is provided on the side of the battery cell facing the insulating spacer 30. In a plane perpendicular to the first direction X, the orthographic projection of the second main body 32 covers the orthographic projection of the pressure relief mechanism 213.

[0192] The second main body 32 is the part of the insulating spacer 30 for connecting the bottom wall 111 and the first main body 31.

[0193] Exemplarily, the first main body 31 and the second main body 32 can be non-detachably connected by means such as integral molding, welding, etc., or can be detachably connected by means such as bolt connection, snap connection, etc.

[0194] In some embodiments, the first connecting portion 313 divides the accommodating cavity 310 into a first accommodating cavity 310A and a second accommodating cavity 310B arranged along the second direction Y. Two conductive members 40 are respectively accommodated in the first accommodating cavity 310A and the second accommodating cavity 310B. The second main body 32 can be formed by extending at least one of the first wall 311 and the second wall 312 towards the bottom wall 111.

[0195] In some embodiments, the first main body 31 is connected to the second box body 12 by means such as bolt locking, gluing, foam support, etc., and the second main body 32 is connected to the bottom wall 111 by means such as bolt locking, gluing, foam support, etc.

[0196] The pressure relief mechanism 213 refers to an element or component that actuates to release the internal pressure or temperature when the internal pressure, temperature, or other conditions of the battery cell 21 reach a predetermined threshold. This threshold design varies according to different design requirements. The threshold may depend on one or several materials among the positive electrode plate, negative electrode plate, electrolyte, and separator membrane in the battery cell 21. The pressure relief mechanism 213 can be in the form of, for example, an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure, temperature, or other conditions of the battery cell 21 reach a predetermined threshold, the pressure relief mechanism 213 performs an action or a weak structure provided in the pressure relief mechanism 213 is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0197] In the embodiments of the present application, the term "actuation" refers to the actuation or activation of the pressure relief mechanism 213 to a certain state, so that the internal pressure and temperature of the battery cell 21 can be released. The actions generated by the pressure relief mechanism 213 may include, but are not limited to: at least a part of the pressure relief mechanism 213 breaking, shattering, melting, being torn or opened, etc. When the pressure relief mechanism 213 is actuated, the high-temperature and high-pressure substances inside the battery cell 21 will be discharged outward from the actuated part as emissions. In this way, the pressure and temperature of the battery cell 21 can be released under controlled pressure or temperature, thereby avoiding potential more serious accidents.

[0198] It can be understood that the pressure relief mechanism 213 is arranged on the side of the battery cell 21 facing the insulation spacer 30, so that when the pressure relief mechanism 213 is actuated, the emissions move along the first direction X towards the adjacent battery cell assembly 20. Since the insulation spacer 30 is located between the adjacent battery cell assemblies 20 and in the plane perpendicular to the second direction Y, at least part of the orthographic projection of the insulation spacer 30 overlaps with the orthographic projection of the pressure relief mechanism 213. Thus, the overlapping part of the orthographic projection of the insulation spacer 30 and the orthographic projection of the pressure relief mechanism 213 can limit the contact between the emissions and the adjacent battery cell assembly 20, thereby reducing the risk of thermal runaway transmission.

[0199] In some embodiments, the insulation spacer 30 includes a first main body 31 and a second main body 32. The first main body 31 has a receiving cavity 310 inside, and the conductive member 40 is received in the receiving cavity 310. Along the second direction Y, one end of the first main body 31 is connected to the second box body 10, and one end of the second main body 32 is connected to the other end of the first main body 31 to limit the emissions from entering the receiving cavity 310 through the gap between the second box body 10 and the first main body 31 in the second direction Y. The other end of the second main body 32 is connected to the bottom wall 111. In the plane perpendicular to the second direction Y, the orthographic projection of the second main body 32 covers the orthographic projection of the pressure relief mechanism 213, so as to reduce the risk of thermal runaway transmission while reducing the movement of the emissions directly towards the direction close to the conductive member 40.

[0200] In some embodiments, the insulation spacer 30 can be made of a heat-resistant material to reduce the risk of the emissions melting the insulation spacer 30 and damaging the conductive member 40.

[0201] In this embodiment, along the second direction Y, one end of the second main body 32 is connected to the first main body 31, and the other end of the second main body 32 is connected to the bottom wall 111, so that the bottom wall 111 can provide a supporting force to the first main body 31 through the second main body 32, thereby further reducing the vibration amplitude of the first main body 31 when it bears an external force, so that the conductive member 40 has a relatively stable working space, and further improving the reliability of the battery device 100; in the plane perpendicular to the first direction X, the orthographic projection of the second main body 32 covers the orthographic projection of the pressure relief mechanism 213, so that when the battery cell 21 has a thermal runaway and discharges emissions through the pressure relief mechanism 213 to reduce the pressure and temperature inside the battery cell 21, the insulating spacer 30 blocks the emissions to a certain extent, so as to reduce the risk that the emissions fall on the battery cell 21 disposed opposite to the battery cell 21 having a thermal runaway in the first direction X, resulting in a short circuit of the battery cell 21 disposed opposite to the battery cell 21 having a thermal runaway in the first direction X, thereby improving the reliability of the battery device 100.

[0202] According to some embodiments of the present application, please refer to Figure 6 , the second main body 32 includes a blocking portion 321 and a second connecting portion 322. Along the second direction Y, one end of the blocking portion 321 is connected to the first main body 31, the other end of the blocking portion 321 is connected to the second connecting portion 322, the second connecting portion 322 protrudes from the side surface of the blocking portion 321 in the first direction X, and the second connecting portion 322 is connected to the bottom wall 111.

[0203] The blocking portion 321 is a wall portion of the second main body 32 for connecting to the first main body 31. Exemplarily, the thickness direction of the blocking portion 321 is parallel to the first direction X.

[0204] The second connecting portion 322 is a wall portion of the second main body 32 connecting the blocking portion 321 and the bottom wall 111.

[0205] In some embodiments, the first connecting portion 313 connects one end of the first wall 311 close to the bottom wall 111 and one end of the second wall 312 close to the bottom wall 111. One end of the blocking portion 321 is connected to the middle portion of the first connecting portion 313 in the first direction X, and the other end of the blocking portion 321 is connected to the middle portion of the second connecting portion 322 in the first direction X.

[0206] In this embodiment, the second connecting portion 322 protrudes from the side surface of the blocking portion 321 in the first direction X, and the second connecting portion 322 is connected to the bottom wall 111. Therefore, compared with the case where the blocking portion 321 is directly connected to the bottom wall 111, the second connecting portion 322 can increase the connection area between the second main body 32 and the bottom wall 111, thereby improving the connection strength between the second main body 32 and the bottom wall 111.

[0207] According to some embodiments of the present application, please refer toFigure 4 Along the first direction X, there is a gap between the blocking portion 321 and the pressure relief mechanism 213.

[0208] In this embodiment, along the first direction X, there is a gap between the blocking portion 321 and the pressure relief mechanism 213. At the same time, since the second connecting portion 322 is connected to the bottom wall 111, a channel is formed between the blocking portion 321, the bottom wall 111, and the battery cell assembly 20. The above channel can guide the high-temperature gas flowing out from the pressure relief mechanism 213 along the second direction Y when the battery cell 21 has a thermal runaway, so as to divert and shunt the high-temperature gas, thereby being able to relieve the force of the high-temperature gas flowing out from the pressure relief mechanism 213, relieve the impact force of the high-temperature gas on the adjacent battery cell assembly 20, and is beneficial to reducing the transmission of thermal runaway, so as to improve the reliability of the battery device 100.

[0209] According to some embodiments of the present application, please refer to Figure 3 Both ends of the second main body 32 in the third direction Z are respectively connected to two structural beams 50.

[0210] Exemplarily, both ends of the second main body 32 opposite to each other in the third direction Z are respectively connected to the two structural beams 50 by means of bolt locking, gluing, foam support, etc.

[0211] In this embodiment, both ends of the second main body 32 in the third direction Z are respectively connected to the two structural beams 50, so that compared with the case where only the first main body 31 of the insulation spacer 30 is connected to the structural beam 50, the connection area between the insulation spacer 30 and the structural beam 50 is increased, thereby further improving the connection reliability between the insulation spacer 30 and the structural beam 50.

[0212] According to some embodiments of the present application, please refer to Figures 4 - 6 and please refer to Figure 7 Figure 7 This is a schematic structural diagram of the battery cell 21 provided by some embodiments of the present application. The battery cell assembly 20 includes a plurality of battery cells 21 arranged along the third direction Z. An electrode terminal 212 is provided on the side of the battery cell 21 facing the insulation spacer 30. The surface of the battery cell 21 perpendicular to the third direction Z is the surface with the largest area of the battery cell 21. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0213] In this embodiment, the battery cell assembly 20 includes a plurality of battery cells 21 arranged along the third direction Z. The surface of the battery cell 21 perpendicular to the third direction Z is the surface with the largest area of the battery cell 21. Thus, when the battery cell 21 expands, the adjacent battery cells 21 in the third direction Z can mutually restrict the expansion of the battery cell 21 in the third direction Z, thereby improving the reliability of the battery device 100. ​

[0214] According to some embodiments of the present application, please refer to Figures 4 - 6 , along the second direction Y, the insulating spacer 30 and the conductive member 40 do not protrude from the side of the battery cell assembly 20 facing away from the bottom wall 111.

[0215] It can be understood that along the second direction Y, the insulating spacer 30 and the conductive member 40 do not protrude from the side of the battery cell assembly 20 facing away from the bottom wall 111, so that there is no need to provide an avoidance structure on the wall portion of the box body 10 disposed opposite to the bottom wall 111 along the second direction Y and corresponding to the insulating spacer 30 and the conductive member 40. As a result, the wall portion of the box body 10 disposed opposite to the bottom wall 111 along the second direction Y can have a certain flatness. Therefore, when the battery device 100 is applied to an electric device, taking a vehicle 1000 or a transport device with the battery device 100 disposed on the chassis as an example, it can be ensured that the chassis provided with the battery device 100 does not need to be provided with an avoidance structure for the box body 10, and further, the chassis of the electric device has a certain flatness, thereby improving the comfort of passengers.

[0216] In some embodiments, the insulating spacer 30 is connected to the wall portion of the box body 10 disposed opposite to the bottom wall 111 along the second direction Y to support the wall portion, thereby improving the structural strength of the wall portion.

[0217] In this embodiment, along the second direction Y, the insulating spacer 30 and the conductive member 40 do not protrude from the side of the battery cell assembly 20 facing away from the bottom wall 111, so that there is no need to provide an avoidance structure on the wall portion of the box body 10 disposed opposite to the bottom wall 111 in the second direction Y for the avoidance of the electrode terminal 212 and the bus bar connecting the electrode terminal 212, simplifying the structure of the box body 10 and facilitating the manufacture of the box body 10.

[0218] According to some embodiments of the present application, the insulating spacer 30 is made of at least one of epoxy resin, polytetrafluoroethylene, and polyimide.

[0219] In this embodiment, by making the insulating spacer 30 from the above-mentioned various materials, on the one hand, the insulating spacer 30 can be made by injection molding in one piece, reducing the manufacturing cost of the insulating spacer 30; on the other hand, the insulating spacer 30 has a certain insulation property, thereby reducing the risk of short circuit between two battery assemblies.

[0220] According to some embodiments of the present application, please refer to Figure 2 , the battery device 100 further includes a control box 60 and a connector 70; the control box 60 is disposed in the box body 10 and is electrically connected to the battery cell assembly 20; the connector 70 is disposed on the wall portion of the box body 10; wherein, the conductive member 40 is used for electrically connecting the control box 60 and the connector 70.

[0221] The control box 60 is a control unit that is electrically connected to the output pole and is used to distribute the energy of the battery cell assembly 20 in the battery device 100. It is electrically connected to the battery cell assembly 20 for high-voltage distribution of the battery device 100.

[0222] The connector 70 is used to be electrically connected to the electrical body of the electrical device.

[0223] In this embodiment, the conductive member 40 is used to electrically connect the control box 60 and the connector 70, so that the electrical body of the electrical device is electrically connected to the battery device 100 through the connector 70.

[0224] According to some embodiments of the present application, the present application further provides an electrical device. The electrical device includes the battery device 100 of any of the above solutions, and the battery cell 21 device is used to provide electrical energy for the electrical device.

[0225] According to some embodiments of the present application, refer to Figures 2 - 7As shown, the present application provides a battery device 100, which includes a box body 10, a battery cell assembly 20, an insulating spacer 30, and a conductive member 40; the box body 10 includes a bottom wall 111; at least two battery cell assemblies 20 are arranged in the box body 10 and spaced along a first direction X, and the bottom wall 111 supports the battery cell assembly 20 along a second direction Y. The battery cell assembly 20 includes at least one battery cell 21, and electrode terminals 212 are provided on the opposite side surfaces of the battery cells 21 in adjacent two battery cell assemblies 20. The first direction X is perpendicular to the second direction Y; along the first direction X, the insulating spacer 30 is arranged between adjacent two battery cell assemblies 20; at least a part of the conductive member 40 is arranged in the insulating spacer 30, and the conductive member 40 is electrically connected to the output pole (not shown in the figure) of the battery cell assembly 20. The insulating spacer 30 is made of at least one of epoxy resin, polytetrafluoroethylene, and polyimide. The battery device 100 further includes a structural beam 50; two structural beams 50 are arranged in the box body 10 and spaced along a third direction Z, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs; wherein, the battery cell assembly 20 is arranged between the two structural beams 50, the insulating spacer 30 extends along the third direction Z, and both ends of the insulating spacer 30 in the third direction Z are respectively connected to the two structural beams 50. The structural beam 50 has a first surface 51 facing away from the bottom wall 111, and a part of the first surface 51 is recessed to form a slot 52 for inserting the insulating spacer 30. At least one side of the insulating spacer 30 along the first direction X is formed with a buckle 31A, and a clamping groove 521 is formed on the groove wall surface of the slot 52. The buckle 31A cooperates with the clamping groove 521 to limit the insulating spacer 30 from disengaging from the slot 52 along the second direction Y. The slot 52 penetrates the structural beam 50 along the third direction Z, and the insulating spacer 30 passes through the slot 52. The insulating spacer 30 includes a first main body 31, and a part of the first main body 31 is received in the slot 52; the inside of the first main body 31 has a receiving cavity 310, and at least a part of the conductive member 40 is received in the receiving cavity 310. The first main body 31 includes a first wall 311, a second wall 312, and a first connecting portion 313. The first wall 311 and the second wall 312 are spaced along the first direction X, a receiving cavity 310 is formed between the first wall 311 and the second wall 312, and the first connecting portion 313 connects the first wall 311 and the second wall 312. A first protrusion 3111 is provided on the side of the first wall 311 facing the second wall 312, and the first protrusion 3111 abuts against the conductive member 40; and / or, a second protrusion 3121 is provided on the side of the second wall 312 facing the first wall 311, and the second protrusion 3121 abuts against the conductive member 40. The number of the conductive members 40 is two, and the two conductive members 40 are arranged along the second direction Y. The first main body 31 further includes a third wall 315 and a fourth wall 316.The third wall 315 is connected to one end of the first wall 311 away from the bottom wall 111, and the third wall 315 overlaps the first surface 51; and / or, the fourth wall 316 is connected to one end of the second wall 312 away from the bottom wall 111, and the fourth wall 316 overlaps the first surface 51. The third wall 315 is detachably connected to the structural beam 50; and / or, the fourth wall 316 is detachably connected to the structural beam 50. The insulation spacer 30 further includes a second body 32. Along the second direction Y, one end of the second body 32 is connected to the first body 31, and the other end of the second body 32 is connected to the bottom wall 111. The second body 32 includes a blocking portion 321 and a second connecting portion 322. Along the second direction Y, one end of the blocking portion 321 is connected to the first body 31, and the other end of the blocking portion 321 is connected to the second connecting portion 322. The second connecting portion 322 protrudes from the side surface of the blocking portion 321 in the first direction X, and the second connecting portion 322 is connected to the bottom wall 111. A pressure relief mechanism 213 is provided on one side of the battery cell 21 facing the insulation spacer 30. In a plane perpendicular to the first direction X, the orthographic projection of the second body 32 covers the orthographic projection of the pressure relief mechanism 213. The two ends of the second body 32 in the third direction Z are respectively connected to two structural beams 50. The battery cell assembly 20 includes a plurality of battery cells 21 arranged along the third direction Z, and the surface of the battery cell 21 perpendicular to the third direction Z is the surface with the largest area of the battery cell 21. Along the second direction Y, the insulation spacer 30 and the conductive member 40 do not protrude from the side of the battery cell assembly 20 facing away from the bottom wall 111. A pressure relief mechanism 213 is provided on one side of the battery cell 21 facing the insulation spacer 30. In a plane perpendicular to the second direction Y, the orthographic projection of the insulation spacer 30 and the orthographic projection of the pressure relief mechanism 213 at least partially overlap. The battery device 100 further includes a control box 60 and a connector 70; the control box 60 is disposed in the box body 10 and is electrically connected to the battery cell assembly 20; the connector 70 is disposed on the wall portion of the box body 10; wherein, the conductive member 40 is used to electrically connect the control box 60 and the connector 70.

[0226] In some embodiments, the first connecting portion 313 divides the accommodating cavity 310 into a first accommodating cavity 310A and a second accommodating cavity 310B arranged along the second direction Y, and the two conductive members 40 are respectively accommodated in the first accommodating cavity 310A and the second accommodating cavity 310B. A first opening is formed on one side of the first accommodating cavity 310A facing away from the second accommodating cavity 310B, and a second opening is formed on one side of the second accommodating cavity 310B facing away from the first accommodating cavity 310A.

[0227] In other embodiments, the first connecting portion 313 connects one end of the first wall 311 close to the bottom wall 111 and one end of the second wall 312 close to the bottom wall 111, and a third opening is formed on the side of the accommodating cavity 310 facing away from the bottom wall 111. A third protrusion 314 is provided on the cavity wall of the accommodating cavity 310. Along the second direction Y, the third protrusion 314 is at least partially located between the two conductive members 40.

[0228] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0229] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery device, characterized in that, Comprising: A box body, including a bottom wall; At least two battery cell assemblies, arranged in the box body at intervals along a first direction, the bottom wall supporting the battery cell assemblies along a second direction, the first direction being perpendicular to the second direction; An insulating spacer, along the first direction, the insulating spacer is arranged between two adjacent battery cell assemblies; The battery cell assembly includes at least one battery cell, along the first direction, at least one electrode terminal of the battery cell in the battery cell assembly faces the insulating spacer; A conductive member, at least partially arranged in the insulating spacer, the conductive member being electrically connected to the output pole of the battery cell assembly; The battery device further includes: A control box, arranged in the box body and electrically connected to the battery cell assembly; A connector, arranged on the wall of the box body; Wherein, the conductive member is used to electrically connect the control box and the connector.

2. The battery device according to claim 1, wherein The battery device further includes: Two structural beams, arranged in the box body at intervals along a third direction, the first direction, the second direction and the third direction being perpendicular to each other in pairs; Wherein, the battery cell assembly is arranged between the two structural beams, the insulating spacer extends along the third direction, and two ends of the insulating spacer in the third direction are respectively connected to the two structural beams.

3. The battery device according to claim 2, wherein, The structural beam has a first surface facing away from the bottom wall, and a part of the first surface is recessed to form a slot for inserting the insulating spacer.

4. The battery device according to claim 3, characterized in that, At least one of the insulating spacer and the wall of the slot is formed with a buckle, and the other is formed with a clamping groove, and the buckle cooperates with the clamping groove to limit the insulating spacer from disengaging from the slot along the second direction.

5. The battery device according to claim 3, characterized in that, The slot penetrates the structural beam along the third direction, and the insulating spacer passes through the slot.

6. The battery device according to claim 3, characterized in that, The insulating spacer includes a first main body, and a part of the first main body is accommodated in the slot; The interior of the first main body has a receiving cavity, and the conductive member is at least partially accommodated in the receiving cavity.

7. The battery device according to claim 6, characterized in that, The first main body includes a first wall, a second wall and a first connecting portion, the first wall and the second wall are arranged at intervals along the first direction, a receiving cavity is formed between the first wall and the second wall, and the first connecting portion connects the first wall and the second wall.

8. The battery device according to claim 7, characterized in that, A first protrusion is arranged on the side of the first wall facing the second wall, and the first protrusion abuts against the conductive member; and / or, A second protrusion is arranged on the side of the second wall facing the first wall, and the second protrusion abuts against the conductive member.

9. The battery device according to claim 8, characterized in that, The number of the conductive members is multiple, and the multiple conductive members are arranged along the second direction.

10. The battery device according to claim 9, characterized in that, The number of the conductive members is two, the first connecting portion divides the receiving cavity into a first receiving cavity and a second receiving cavity arranged along the second direction, and the two conductive members are respectively accommodated in the first receiving cavity and the second receiving cavity.

11. The battery device according to claim 10, wherein, A first opening is formed on the side of the first receiving cavity facing away from the second receiving cavity, and a second opening is formed on the side of the second receiving cavity facing away from the first receiving cavity.

12. The battery device according to claim 9, wherein, The number of the conductive members is two. The first connecting portion connects one end of the first wall close to the bottom wall and one end of the second wall close to the bottom wall. A third opening is formed on a side of the accommodating cavity facing away from the bottom wall.

13. The battery device according to claim 12, wherein A third protrusion is provided on the cavity wall of the accommodating cavity. Along the second direction, at least a part of the third protrusion is located between the two conductive members.

14. The battery device according to claim 7, wherein The first main body further includes: a third wall connected to one end of the first wall away from the bottom wall, and the third wall overlaps on the first surface; and / or, a fourth wall connected to one end of the second wall away from the bottom wall, and the fourth wall overlaps on the first surface.

15. The battery device according to claim 14, wherein The third wall is detachably connected to the structural beam; and / or, The fourth wall is detachably connected to the structural beam.

16. The battery device according to claim 6, wherein, The insulating spacer further includes: a second main body. Along the second direction, one end of the second main body is connected to the first main body, and the other end of the second main body is connected to the bottom wall; A pressure relief mechanism is provided on a side of the battery cell facing the insulating spacer. On a plane perpendicular to the first direction, the orthographic projection of the second main body covers the orthographic projection of the pressure relief mechanism.

17. The battery device according to claim 16, characterized in that, The second main body includes a blocking portion and a second connecting portion. Along the second direction, one end of the blocking portion is connected to the first main body, the other end of the blocking portion is connected to the second connecting portion. The second connecting portion protrudes from a side surface of the blocking portion in the first direction, and the second connecting portion is connected to the bottom wall.

18. The battery device according to claim 17, wherein, There is a gap between the blocking portion and the pressure relief mechanism along the first direction.

19. The battery device according to claim 16, characterized in that, Two ends of the second main body in the third direction are respectively connected to the two structural beams.

20. The battery device according to claim 1, characterized in that, The battery cell assembly includes a plurality of battery cells arranged along the third direction. A surface of the battery cell perpendicular to the third direction is the surface with the largest area of the battery cell. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

21. The battery device according to claim 1, wherein, Along the second direction, the insulating spacer and the conductive members do not protrude from a side of the battery cell assembly facing away from the bottom wall.

22. The battery device according to claim 1, characterized in that, The insulating spacer is made of at least one of epoxy resin, polytetrafluoroethylene, and polyimide.

23. An electrical device, characterized in that, Including the battery device according to any one of claims 1-22, and the battery device is used to provide electric energy.

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