Battery device and electric device

Abstract

The invention discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a box body, a battery monomer assembly, an insulating separator and a conductive part, the box body comprises a bottom wall; the at least two battery monomer assemblies are arranged in the box body and are arranged at intervals in the first direction, the bottom wall supports the battery monomer assemblies in the second direction, and the first direction is perpendicular to the second direction; along the first direction, the insulating separator is arranged between two adjacent battery monomer assemblies; the battery monomer assembly comprises at least one battery monomer, and at least one electrode terminal of the battery monomer in the battery monomer assembly is arranged towards the insulating separator along a first direction; at least part of the conductive part is arranged in the insulating isolation part, the conductive part is electrically connected with the output electrode of the battery monomer assembly, and the technical scheme provided by the invention can improve the energy density of the battery device.

Description

Technical Field

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

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

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

[0004] Therefore, how to improve the volume energy density of battery devices is an urgent problem to be solved in battery technology. Summary of the invention

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

[0006] In a first aspect, an embodiment of the present application provides a battery device, comprising a case, a battery cell assembly, an insulating spacer and a conductive member; the case comprises a bottom wall; at least two battery cell assemblies are arranged in the case and spaced apart along a first direction, and 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 arranged between two adjacent battery cell assemblies; the battery cell assembly comprises at least one battery cell, and along the first direction, at least one electrode terminal of the battery cell in the battery cell assembly is arranged toward the insulating spacer; at least a portion 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.

[0007] In the above technical scheme, the insulating spacer is arranged along the first direction between two adjacent battery cell assemblies. On the one hand, the insulating spacer can insulate and isolate 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, reduce the risk of internal short circuit between the two adjacent battery cell assemblies, and improve the reliability of the battery device; on the other hand, compared with the situation where no insulating spacer is arranged between the 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 in the box, which is beneficial to improving the energy density of the battery device; at the same time, at least part of the conductive member is arranged in the insulating spacer, so that the space occupied by the insulating spacer and the conductive member in the box is reduced while satisfying the requirements of the conductive member for electrically connecting the battery cell assembly and the electrical body of the electrical device and the insulating spacer for isolating the two adjacent battery cell assemblies, thereby increasing the space in the box that can be used for installing the battery cell assembly under the premise that the volume of the box remains unchanged, which is beneficial to improving the energy density of the battery device.

[0008] In some embodiments, the battery device also includes a structural beam; two structural beams are arranged in the box body and are spaced apart along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; wherein the battery cell assembly is arranged between the two structural beams, the insulating isolation member extends along the third direction, and the insulating isolation member is respectively connected to the two structural beams at both ends in the third direction.

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

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

[0011] In the above technical solution, a portion of the first surface is recessed to form a slot for inserting the insulating spacer, that is, part of the insulating spacer is arranged in the structural beam, so that while the insulating spacer and the structural beam can be connected, on the one hand, the space in the box occupied by the insulating spacer and the structural beam is reduced, thereby increasing the space in the box that can be used for installing battery cell assemblies while keeping the volume of the box unchanged, which is beneficial to improving the energy density of the battery device; on the other hand, compared with the situation 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, thereby facilitating reducing the size of the box in the second direction, and then reducing the size of the battery device in the second direction.

[0012] In some embodiments, at least one of the insulating isolation piece and the wall of the slot is formed with a snap hook, and the other is formed with a snap-in groove, and the snap hook cooperates with the snap-in groove to limit the insulating isolation piece from detaching from the slot along the second direction.

[0013] In the above technical solution, at least one of the insulating isolator and the wall of the slot is formed with a snap buckle, and the other is formed with a snap-in groove. The snap buckle cooperates with the snap-in groove to limit the insulating isolator from escaping from the slot along the second direction. By cooperating with the snap buckle and the snap-in groove, the insulating isolator is assembled and limited on the structural beam. The structure is simple and easy to assemble.

[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 passes through the structural beam along the third direction, and the insulating isolation member passes through the slot, thereby facilitating the conductive member to pass through the structural beam along the third direction through the insulating isolation member, thereby facilitating the conductive member to electrically connect the battery cell assembly and the electrical body of the electrical device.

[0016] In some embodiments, the insulating isolation member includes a first body, a portion of which is accommodated in the slot; the first body has an accommodating cavity inside, and the conductive member is at least partially accommodated in the accommodating cavity.

[0017] In the above technical solution, part of the first main body is accommodated in the slot, and the first main body has an accommodating cavity inside, and the conductive member is at least partially accommodated in the accommodating cavity, thereby reducing the space in the box occupied by the first main body and the structural beam, and reducing the space in the box occupied by the conductive member and the first main body. Therefore, under the premise that the volume of the box remains unchanged, the space in the box that can be used for installing the battery cell assembly is increased, which is beneficial 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, the accommodating cavity is formed between the first wall and the second wall, and 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 a accommodating cavity between the first wall and the second wall, so that the first wall or the second wall is arranged between the part of the conductive member accommodated in the accommodating cavity and the battery cell assembly adjacent to it in the first direction, so that the battery cell assembly and the conductive member can have independent working spaces, reducing the risk of mutual 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 isolation member.

[0020] In some embodiments, a first protrusion is provided on a 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 a 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 is used to contact the conductive member to limit the movement of the conductive member when the conductive member and the battery device are assembled and used. The structure is simple and easy to implement.

[0022] In some embodiments, there are multiple conductive elements, and the multiple conductive elements are arranged along the second direction.

[0023] In the above technical solution, there are multiple conductive members so as to electrically connect the two electrode ends of the control box and the current inflow end and outflow end of the power body of the electrical device respectively; the two conductive members are arranged along the second direction, and then relative to the situation where the two conductive members are arranged along the first direction, the insulating isolation member can accommodate the two conductive members under the premise of being smaller in size in the first direction, thereby reducing the space occupied by the battery cell assembly and the insulating isolation member in the first direction, thereby reducing the size of the electrical device in the first direction, and more reasonably utilizing the space in 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, 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.

[0025] In the above technical solution, the first connecting portion separates 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, thereby enabling the two conductive members to have independent working spaces, thereby reducing the risk of mutual interference between two adjacent 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, so that it is convenient to insert the conductive part into the first accommodating cavity through the first opening, and then it is convenient to assemble the conductive part in the first accommodating cavity; the second accommodating cavity has a second opening, so that it is convenient to insert the conductive part into the second accommodating cavity through the second opening, and then it is convenient to assemble the conductive part in the second accommodating cavity; at the same time, since the first opening is located on the side of the first accommodating cavity away from the second accommodating cavity, and the second opening is located on the side of the second accommodating cavity away from the first accommodating cavity, the first opening and the second opening are located on opposite sides of the first main body, thereby reducing the risk of mutual interference between the two conductive parts when assembling them.

[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 the side of the accommodating cavity away from the bottom wall.

[0029] In the above technical solution, a third opening is formed on a side of the accommodating cavity away from the bottom wall, so that the conductive member can be inserted into the accommodating cavity through the third opening, thereby facilitating the assembly of the conductive member in the accommodating cavity.

[0030] In some embodiments, a cavity wall of the accommodating cavity is provided with a third protrusion, and along the second direction, the third protrusion is at least partially located between the two conductive members.

[0031] In the above technical solution, the third protrusion is at least partially located between the two conductive parts, so that when the two conductive parts tend to move toward each other, the third protrusion can abut against them to limit the movement of the two conductive parts toward each other, thereby reducing the risk of mutual interference between the two adjacent conductive parts 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 an 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 an 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 is overlapped on the first surface; and / or the fourth wall is connected to the end of the second wall away from the bottom wall, and the fourth wall is overlapped on the first surface, so that the structural beam can provide supporting force to the first body through the third wall and / or the fourth wall, and increase the contact area between the structural beam and the first body, thereby improving the reliability of the connection between the first body and the structural beam. On the one hand, when any structural beam is subjected to external force, the component force in the third direction can be more stably transmitted to another structural member through the first body, thereby improving the structural strength of the structural beam; on the other hand, it can further reduce the vibration amplitude of the first body when subjected to 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, thereby facilitating the installation and disassembly of the first body and the structural beam, and facilitating the assembly and maintenance of the battery device.

[0036] In some embodiments, the insulating isolation member also includes a second body, one end of the second body is connected to the first body along the second direction, and the other end of the second body is connected to the bottom wall, and a pressure relief mechanism is provided on the side of the battery cell facing the insulating isolation member, and on a plane perpendicular to the first direction, the orthographic projection of the second 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 body is connected to the first body, and the other end of the second body is connected to the bottom wall, so that the bottom wall can provide supporting force to the first body through the second body, and can further reduce the vibration amplitude of the first body when subjected to external force, so that the conductive part has a relatively stable working space, thereby improving the reliability of the battery device; on the plane perpendicular to the first direction, the orthographic projection of the second body covers the orthographic projection of the pressure relief mechanism, so that when the battery cell has thermal runaway and the emissions are discharged through the pressure relief mechanism to reduce the pressure and temperature inside the battery cell, the insulating isolation member blocks the emissions to a certain extent, so as to reduce the risk of emissions falling on the battery cell arranged opposite to the battery cell having thermal runaway in the first direction, causing the battery cell arranged opposite to the battery cell having 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, and along the second direction, one end of the blocking portion is connected to the first body, and the other end of the blocking portion is connected to the second connecting portion, the second connecting portion protrudes from the side 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 the side of the blocking portion in the first direction, and the second connecting portion is connected to the bottom wall. Therefore, compared with the case where the blocking portion is directly connected to the bottom wall, the second connecting portion can increase the area where the second main body is connected to the bottom wall, thereby improving the connection strength between the second main body and the bottom wall.

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

[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, the blocking portion, the bottom wall and the battery cell assembly form a channel. The above channel can guide the high-temperature airflow rushing out of the pressure relief mechanism along the second direction when thermal runaway occurs in the battery cell, so as to guide and divert the high-temperature airflow, thereby relieving the high-temperature airflow rushing out of the pressure relief mechanism, thereby alleviating the impact force of the high-temperature airflow on the adjacent battery cell assembly, which is beneficial to reducing the transmission of thermal runaway and improving the reliability of the battery device.

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

[0043] In the above technical solution, the two ends of the second main body in the third direction are respectively connected to the two structural beams, thereby increasing the connection area between the insulating isolation member and the structural beam compared to the situation where only the first main body is connected to the structural beam, thereby further improving the reliability of the connection between the insulating isolation member and the structural beam.

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

[0045] In the above technical solution, the battery cell assembly includes a plurality of battery cells arranged along a third direction, and the surface of the battery cell perpendicular to the third direction is the surface of the battery cell with the largest area. Therefore, when the battery cell expands, the battery cells adjacent to each other in the third direction can limit 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 a side of the battery cell assembly facing away from the bottom wall.

[0047] In the above technical solution, along the second direction, the insulating isolation member and the conductive member do not protrude from the side of the battery cell assembly away from the bottom wall, so that the wall portion of the box body arranged 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 busbar connecting the electrode terminals, thereby 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, the insulating spacer is made of the above materials. On the one hand, the insulating spacer can be made by one-piece injection molding, which reduces 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 components.

[0050] In some embodiments, the battery device also 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 of the box body; wherein the conductive member is used to electrically connect the control box and the connector.

[0051] In the above technical solution, the conductive member is used to electrically connect the control box and the connector, so that the power-consuming body of the power-consuming device is electrically connected to the battery device through the connector.

[0052] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery device as described in any embodiment of the first aspect, wherein the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application; Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application; Figure 3A schematic diagram of the structure of the insulating spacer, the structural beam and the conductive member provided in some embodiments of the present application; Figure 4 for Figure 2 Sectional view of AA in the middle; Figure 5 A cross-sectional view of a battery device provided in some embodiments of the present application; Figure 6 A cross-sectional view of another battery device provided for some embodiments of the present application; Figure 7 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application.

[0055] Icons: 1000-vehicle; 100-battery device; 10-box; 11-first box body; 111-bottom wall; 12-second box body; 20-battery cell assembly; 21-battery cell; 211-housing; 2111-seventh wall; 212-electrode terminal; 213-pressure relief mechanism; 30-insulating spacer; 31-first body; 310-accommodating chamber; 310A-first accommodation chamber; 310B-second accommodation chamber; 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 body; 321-blocking portion; 322-second connecting portion; 40-conductive member; 50-structural beam; 51-first surface; 52-slot; 521-clamping slot; 60-control box; 70-connector; 200-controller; 300-motor; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0058] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0059] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0062] The term “plurality” used in this application refers to two or more (including two).

[0063] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0064] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0065] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0066] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0067] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0068] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0069] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0070] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (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.).

[0071] 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 multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0072] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0073] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0074] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0075] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0076] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body 10 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0077] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0078] The following will mainly focus on the rectangular battery cell. 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.

[0079] The development of battery technology must take into account many design factors at the same time, such as reliability, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the energy density of the battery must also be considered.

[0080] In a common battery device, a conductive member and a battery cell assembly are provided in the box. In some embodiments, the conductive member is used to electrically connect the current output end of the battery cell assembly and the power-consuming body of the power-consuming device. In some embodiments, the conductive member is used to electrically connect two power-consuming bodies of the power-consuming device. The battery cell assembly is a plurality of battery cells arranged along the first direction, and the battery cell assembly includes at least one battery cell. The battery cells in two adjacent battery cell assemblies are provided with electrode terminals on the opposite sides. In order to reduce the risk of the two adjacent battery cell assemblies being short-circuited due to the abutment of the electrode terminals of the battery cells of the two adjacent battery cell assemblies, a large gap is provided between the two adjacent battery cell assemblies. At the same time, in order to reduce the risk that the components in the battery device (such as the battery cell assembly, etc.) collide with the conductive member and interfere with the work of the conductive member when the battery device shakes. The conductive member generally needs to be provided separately. Thereby, the space in the box is additionally occupied, thereby reducing the space in the box that can be used to install the battery cell assembly. Thereby, the energy density of the battery device is reduced.

[0081] Based on the above considerations, in order to increase the space in the box that can be used to install the battery cell assembly, thereby increasing the energy density of the battery device. The embodiment of the present application provides a battery device, including a box, a battery cell assembly, an insulating spacer and a conductive member; the box includes a bottom wall; at least two battery cell assemblies are arranged in the box and spaced along a first direction, and the bottom wall supports the battery cell assembly along a second direction, and the first direction is 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 is arranged toward the insulating spacer; at least 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.

[0082] In a battery device of this structure, an insulating spacer is arranged along a first direction between two adjacent battery cell assemblies. On the one hand, the insulating spacer can insulate and isolate 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, reduce the risk of internal short circuit between the two adjacent battery cell assemblies, and improve the reliability of the battery device; on the other hand, compared with the situation where no insulating spacer is arranged between the 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 in the box, which is beneficial to improving the energy density of the battery device; at the same time, at least part of the conductive member is arranged in the insulating spacer, so that the space occupied by the insulating spacer and the conductive member in the box is reduced while the conductive member is electrically connected to the battery cell assembly and the electrical body of the electrical device, and the insulating spacer is used to isolate the two adjacent battery cell assemblies, thereby increasing the space in the box that can be used for installing the battery cell assembly while keeping the volume of the box unchanged, which is beneficial to improving the energy density of the battery device.

[0083] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using the battery devices.

[0084] Electrical devices include, but are not limited to, battery vehicles, electric vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0085] For example, Figure 1 The schematic diagram of the structure of the vehicle 1000 of some embodiments of the present application, the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may 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 may be arranged inside the vehicle 1000, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 may be arranged at the bottom or the front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power supply for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand during the start, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power supply for the vehicle 1000, but also as a driving power supply for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0086] In order to meet different power usage requirements, the battery device 100 may include a plurality of battery cells 21, wherein the plurality of battery cells 21 may be connected in series, in parallel, or in a hybrid connection, wherein the hybrid connection refers to a mixture of series and parallel connections. The battery device 100 may also be referred to as a battery pack. Optionally, a plurality of battery cells 21 may first be connected in series, in parallel, or in a hybrid connection to form a battery cell assembly 20, and a plurality of battery cell assemblies 20 may then be connected in series, in parallel, or in a hybrid connection to form a battery device 100. In other words, a plurality of battery cells 21 may directly form a battery device 100, or may first form a battery cell assembly 20, and the battery cell assembly 20 may then form a battery device 100.

[0087] For example, see Figure 2 , Figure 2 1 is an exploded view of the structure of a battery device 100 in some embodiments of the present application. The battery device 100 may include a plurality of battery cells 21. The battery device 100 may also include a housing 10. The interior of the housing 10 is a hollow structure. The plurality of battery cells 21 are accommodated in the housing 10. Figure 2 As shown, 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 buckled together. The shapes of the first box body 11 and the second box body 12 can be determined according to the shapes of the combination of multiple battery cells 21, and the first box body 11 and the second box body 12 can both have an open surface. For example, the first box body 11 and the second box body 12 can both be hollow rectangular parallelepipeds and each has only one open surface, the open surface of the first box body 11 and the open surface of the second box body 12 are arranged opposite to each other, and the first box body 11 and the second box body 12 are buckled together to form a box body 10 with a closed chamber. Multiple battery cells 21 are connected in parallel or in series or in mixed connection and are placed in the box body 10 formed by the buckling of the first box body 11 and the second box body 12.

[0088] Optionally, the battery device 100 may also include other structures, which are not described one by one here. For example, the battery device 100 may also include a busbar component, which is used to realize electrical connection between multiple battery cells 21, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can realize electrical connection between the battery cells 21 by connecting the electrode terminals 212 (not shown in the figure) of the battery cells 21. Furthermore, the busbar component can be fixed to the electrode terminals 212 (not shown in the figure) of the battery cells 21 by welding. The electrical energy of multiple battery cells 21 can be further led out through the box 10 through the conductive mechanism.

[0089] According to different power requirements, the number of battery cells 21 can be set to any value. Multiple battery cells 21 can be connected in series, parallel or mixed 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 constitutes 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 demand. The battery device 100 may include multiple battery cell assemblies 20, which can be connected in series, parallel or mixed.

[0090] Please refer to Figure 2 , and please refer to Figure 3-Figure 6 , Figure 3 The schematic diagram of the structure of the insulating spacer 30, the structural beam 50 and the conductive member 40 provided in some embodiments of the present application is as follows: Figure 4 for Figure 2 The cross-sectional view of AA in the figure, Figure 5 A cross-sectional view of a battery device provided in some embodiments of the present application; Figure 6 A cross-sectional view of another battery device provided for some embodiments of the present application. The present application provides a battery device 100, including a housing 10, a battery cell assembly 20, an insulating spacer 30 and a conductive member 40; the housing 10 includes a bottom wall 111; at least two battery cell assemblies 20 are arranged in the housing 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 insulating spacer 30 is arranged 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 is arranged toward the insulating spacer 30; at least a portion 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.

[0091] The box 10 can be made of metal material. For example, the box 10 can be made of aluminum, aluminum alloy or steel. It can be understood that when the box 10 is made of steel, the box 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 10. When the box 10 is made of aluminum or aluminum alloy, the box 10 has a certain deformation ability, which can provide a buffering effect for the battery under impact and vibration conditions, and the same volume of aluminum or aluminum alloy is lighter than steel, which is beneficial to reduce the weight of the battery.

[0092] The first direction X may be parallel to the width of the box body 10 , the second direction Y may be parallel to the height direction of the box body 10 , and the third direction Z may be parallel to the length direction of the box body 10 .

[0093] In some embodiments, the first box body 11 has a bottom wall 111, which is supported on the battery cell assembly 20 along the second direction Y. The first box body 11 is provided with an opening on one side 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.

[0094] The insulating 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 .

[0095] The insulating spacer 30 may be provided integrally with the box body 10 , or the insulating spacer 30 may be provided separately from the box body 10 .

[0096] It can be understood that the insulating spacer 30 is made of insulating material.

[0097] In some embodiments, the insulating spacer 30 may be made of a hot-melt material having insulating properties, so that the insulating spacer 30 may be manufactured by extrusion molding, thereby facilitating the production and processing of the insulating spacer 30 .

[0098] Exemplarily, the insulating isolation member 30 is made of an insulating material, so that the insulating isolation member 30 has insulating properties, so that the insulating isolation member 30 can isolate two adjacent battery cell assemblies 20 so that the two adjacent battery cell assemblies 20 can have independent working spaces. At the same time, the insulating isolation member 30 can also provide insulation protection between the two adjacent battery cell assemblies 20, thereby 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.

[0099] In some embodiments, the battery cell 21 includes a housing 211, an electrode terminal 212, and an electrode assembly, wherein the housing 211 has a seventh wall 2111 facing the insulating 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 the electrode assembly is electrically connected to the electrode terminal 212.

[0100] 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 arranged is not the largest surface of the battery cell 21, thereby reducing the space volume occupied by the electrode terminal 212.

[0101] In some embodiments, the insulating isolation member 30 is made of an insulating material, so that the battery cell 21 in the battery cell assembly 20 is provided with an electrode terminal 212 on the side facing the insulating isolation member 30. On the one hand, the buffer space between the battery cell assembly 20 and the insulating isolation member 30 in the first direction X can be reasonably utilized. On the other hand, since the insulating isolation member 30 can insulate and isolate adjacent battery cells 21 while isolating adjacent battery cell assemblies 20, the distance between the electrode terminal 212 and the insulating isolation member 30 can be minimized, thereby reducing the space occupied by the electrode terminal 212 in the box body 10, and reasonably utilizing the space in the box body 10, thereby improving the energy density of the battery device 100.

[0102] It can be understood that the electrode terminal 212 is arranged on the side of the battery cell 21 facing the insulating isolation member 30, that is, on the side of the battery cell 21 not facing away from the bottom wall 111, so that there is no need to set an avoidance structure opposite to the electrode terminal 212 on the wall portion of the box body 10 opposite to the bottom wall 111 along the second direction Y, so that the wall portion of the box body 10 opposite to the bottom wall 111 along the second direction Y can have a certain flatness, so that when the battery device 100 is used in an electrical device, taking the vehicle 1000 or a transportation device in which the battery device 100 is set on the chassis as an example, the chassis in which the battery device 100 is set can be free of the need to set a structure to avoid the box body 10, and the chassis of the electrical device has a certain flatness, thereby improving the comfort of the passengers. At the same time, the electrode terminal 212 is provided on the side of the battery cell 21 facing the insulating isolation member 30, so that compared with the situation where the electrode terminal 212 is provided on the side of the battery cell 21 away from the bottom wall 111, the wall portion of the box body 10 arranged opposite to the bottom wall 111 in the second direction Y does not need to be provided with an avoidance structure for avoiding the electrode terminal 212 and the busbar connecting the electrode terminal 212, thereby simplifying the structure of the box body 10 and facilitating the manufacture of the box body 10.

[0103] In some embodiments, the battery cell 21 has two electrode terminals 212 with opposite polarities. One electrode terminal 212 is disposed on the side of the battery cell 21 facing the insulating spacer 30 , and the other electrode terminal 212 is disposed on the side of the battery cell 21 facing away from the insulating spacer 30 .

[0104] In some embodiments, the battery cell 21 has two electrode terminals 212 with opposite polarities. The battery cell 21 is provided with two electrode terminals 212 on the side facing the insulating spacer 30 . The two electrode terminals 212 are spaced apart along the second direction Y.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] The output pole is used to conduct the electrical energy of the battery cells 21 in the battery cell assembly 20 .

[0110] “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.

[0111] “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 .

[0112] In this embodiment, the insulating spacer 30 is arranged along the first direction X between two adjacent battery cell assemblies 20. On the one hand, the insulating spacer 30 can insulate and isolate the electrode terminals 212 of the battery cells 21 in the two adjacent battery cell assemblies 20, so that the two adjacent battery cell assemblies 20 can have independent working spaces, reduce the risk of internal short circuit between the two adjacent battery cell assemblies 20, and improve the reliability of the battery device 100; on the other hand, compared with the case where the insulating spacer 30 is not arranged between the two adjacent battery cell assemblies 20, the electrode terminals 212 of the battery cells 21 in the two adjacent battery cell assemblies 20 are reduced. 12, thereby improving the space utilization rate in the box body 10, which is beneficial to improving the energy density of the battery device 100; at the same time, at least a part of the conductive member 40 is arranged in the insulating isolation member 30, so that while the conductive member 40 is electrically connected to the battery cell assembly 20 and the electrical body of the electrical device, and the insulating isolation member 30 is used to isolate two adjacent battery cell assemblies 20, the space occupied by the insulating isolation member 30 and the conductive member 40 in the box body 10 is reduced, thereby increasing the space in the box body 10 that can be used for installing the battery cell assembly 20 under the premise that the volume of the box body 10 remains unchanged, which is beneficial to improving the energy density of the battery device 100.

[0113] According to some embodiments of this application, please refer to Figure 2 and Figure 3 , Figure 2 This is an exploded view of the structure of the battery device 100 provided in some embodiments of the present application. Figure 3 The schematic diagram of the structure of the insulating spacer 30, the structural beam 50 and the conductive member 40 provided in some embodiments of the present application. The battery device 100 further includes a structural beam 50; two structural beams 50 are arranged in the box body 10 and are arranged at intervals along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; 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 the two ends of the insulating spacer 30 in the third direction Z are respectively connected to the two structural beams 50.

[0114] The structural beam 50 is a structural member disposed in the box body 10. Exemplarily, the structural beam 50 can be made of metal material.

[0115] 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 walls of the first box body 11 opposite to each other in the first direction X, so as to increase the structural strength of the first box body 11 .

[0116] 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 abutted against 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.

[0117] In this embodiment, the battery cell assembly 20 is arranged between the 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, the two ends of the insulating isolation member 30 in the third direction Z are respectively connected to the two structural beams 50. On the one hand, when any structural beam 50 is subjected to external force, the component force in the third direction Z can be transmitted to the other structural member through the insulating isolation member 30, thereby improving the structural strength of the structural beam 50; on the other hand, the two structural beams 50 can respectively provide supporting force to the two ends of the insulating isolation member 30, thereby reducing the vibration amplitude of the insulating isolation member 30 when subjected to external force, so that the conductive member 40 has a relatively stable working space, thereby improving the reliability of the battery device 100.

[0118] According to some embodiments of this 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 portion of the first surface 51 is recessed to form a slot 52 for the insulating spacer 30 to be inserted into.

[0119] The first surface 51 is a side surface of the structural beam 50 away from the bottom wall 111 in the second direction Y. Exemplarily, the first surface 51 may be a plane.

[0120] The slot 52 is a groove-shaped structure formed by the first surface 51 being recessed toward the bottom wall 111. For example, 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.

[0121] Specifically, the first surface 51 is recessed to form a slot 52, and the insulating spacer 30 is inserted into the slot 52, that is, part of the insulating spacer 30 is accommodated in the slot 52 along the second direction Y, so that the insulating spacer 30 and the structural beam 50 share at least part of the space in the second direction Y.

[0122] In the present embodiment, a portion of the first surface 51 is recessed to form a slot 52 for inserting the insulating isolation member 30, that is, a portion of the insulating isolation member 30 is arranged in the structural beam 50, so that when the insulating isolation member 30 and the structural beam 50 are connected, on the one hand, the space occupied by the insulating isolation member 30 and the structural beam 50 in the box body 10 is reduced, thereby increasing the space available for installing the battery cell assembly 20 in the box body 10 under the premise that the volume of the box body 10 remains unchanged, which is beneficial to improve the energy density of the battery device 100; on the other hand, compared with the situation where the insulating isolation member 30 and the structural beam 50 are stacked along the second direction Y, the space occupied by the insulating isolation member 30 and the structural beam 50 in the second direction Y is reduced, thereby facilitating the reduction of the size of the box body 10 in the second direction Y, and then reducing the size of the battery device 100 in the second direction Y.

[0123] According to some embodiments of this application, please refer to Figure 5 and Figure 6 At least one of the insulating isolation piece 30 and the wall of the slot 52 is formed with a buckle 31A, and the other is formed with a snap-fit ​​groove 521. The buckle 31A cooperates with the snap-fit ​​groove 521 to limit the insulating isolation piece 30 from escaping from the slot 52 along the second direction Y.

[0124] In some embodiments, a buckle 31A is formed on at least one side of the insulating isolation member 30 along the first direction X, and a snap groove 521 is formed on the groove wall of the slot 52. The buckle 31A cooperates with the snap groove 521 to limit the insulating isolation member 30 from detaching from the slot 52 along the second direction Y.

[0125] In some embodiments, a snap 31A is formed on at least one slot wall of the slot 52, and a snap groove 521 is formed on at least one side of the insulating isolation member 30 along the first direction X. The snap 31A cooperates with the snap groove 521 to limit the insulating isolation member 30 from detaching from the slot 52 along the second direction Y.

[0126] “A buckle 31A is formed on at least one side of the insulating spacer 30 along the first direction X” can be understood as that a buckle 31A is formed on one side of the insulating spacer 30 in the first direction X, or that the insulating spacer 30 has buckles 31A on both opposite sides in the first direction X.

[0127] Exemplarily, the slot wall of the slot 52 is recessed along the first direction X to form a snap-fit ​​slot 521. It can be understood that the snap-fit ​​slot 521 is disposed corresponding to the buckle 31A.

[0128] In this embodiment, at least one of the insulating isolation member 30 and the wall portion 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 isolation member 30 from escaping from the slot 52 along the second direction Y. By cooperating with the snap 31A and the snap groove 521, the insulating isolation member 30 is assembled and limited on the structural beam 50. The structure is simple and easy to assemble.

[0129] According to some embodiments of this application, please refer to Figure 4 The slot 52 penetrates the structural beam 50 along the third direction Z, and the insulating isolation piece 30 passes through the slot 52 .

[0130] The slot 52 penetrates the structural beam 50 along the third direction Z, that is, two ends of the slot 52 in the third direction Z are connected to two sides of the structural beam 50 that are oppositely arranged in the third direction Z respectively.

[0131] 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 opposite sides of the two structural beams 50 in the third direction Z. The conductive member 40 is accommodated in the insulating isolation member 30 and passes through the slot 52, so that the opposite ends of the conductive member 40 are respectively connected to the control box 60 and the connector 70.

[0132] 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 is accommodated in the insulating isolation member 30 and passes through the slot 52, so that the opposite ends of the conductive member 40 respectively pass through the two wall portions of the box body 10 that are oppositely arranged in the third direction Z and are respectively electrically connected to the two electrical bodies.

[0133] In this embodiment, the slot 52 passes through the structural beam 50 along the third direction Z, and the insulating isolation member 30 passes through the slot 52, thereby facilitating the conductive member 40 to pass through the structural beam 50 along the third direction Z through the insulating isolation member 30, thereby facilitating the conductive member 40 to electrically connect the battery cell assembly 20 and the electrical body of the electrical device.

[0134] According to some embodiments of this application, please refer to Figure 5 and Figure 6 The insulating isolation member 30 includes a first body 31 , and a portion of the first body 31 is accommodated in the slot 52 ; the first body 31 has an accommodating cavity 310 inside, and the conductive member 40 is at least partially accommodated in the accommodating cavity 310 .

[0135] The first body 31 is a portion of the insulating spacer 30 for accommodating the conductive member 40 .

[0136] The accommodating cavity 310 is a cavity structure in the first body 31 for accommodating the conductive member 40 . Exemplarily, the length direction of the accommodating cavity 310 may extend along the third direction Z.

[0137] In some embodiments, on 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 the first body 31 is partially accommodated in the slot 52 and the conductive member 40 is at least partially accommodated in the accommodating cavity 310, the first body 31 is arranged between at least part of the circumference of the portion of the conductive member 40 located in the slot 52 and the slot wall of the slot 52. Therefore, relative to the situation where the conductive member 40 is directly inserted into the slot 52, when the insulating isolation member 30 is shaken by external force, the first body 31 can limit the conductive member 40 from abutting against and sliding relative to the edge of the slot 52, thereby reducing the risk of the conductive member 40 being worn and causing an internal short circuit in the battery device 100.

[0138] In some embodiments, one side of the accommodation cavity 310 in the first direction X may be provided with an opening for inserting the conductive member 40 into the accommodation cavity 310 .

[0139] In this embodiment, part of the first body 31 is accommodated in the slot 52, the first body 31 has an accommodating cavity 310 inside, and the conductive member 40 is at least partially accommodated in the accommodating cavity 310, which reduces the space in the box 10 occupied by the first body 31 and the structural beam 50, and reduces the space in the box 10 occupied by the conductive member 40 and the first body 31, thereby increasing the space in the box 10 that can be used to install the battery cell assembly 20 under the premise that the volume of the box 10 remains unchanged, thereby facilitating the improvement of the energy density of the battery device 100. In particular, when part of the conductive member 40 is accommodated in the slot 52, the space in the box 10 occupied by the conductive member 40, the first body 31 and the structural beam 50 can be further reduced, thereby further facilitating the improvement of the energy density of the battery device 100.

[0140] According to some embodiments of this 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. The first connecting portion 313 connects the first wall 311 and the second wall 312.

[0141] The first wall 311 and the second wall 312 are wall portions of the first body 31 respectively close to two adjacent battery cell assemblies 20 in the first direction X. Exemplarily, the first wall 311 is parallel to the second wall 312, and a thickness direction of the first wall 311 is parallel to the first direction X. A portion of the first wall 311 may be accommodated in the slot 52, and a portion of the second wall 312 may be accommodated in the slot 52.

[0142] In some embodiments, the first wall 311 and the second wall 312 are interference fit with the conductive part 40, so that during the assembly and use of the conductive part 40, the first wall 311 and the second wall 312 provide an extrusion force to the conductive part 40, and provide a friction force when the conductive part 40 tends to move relative to the first body 31, thereby limiting the movement of the conductive part 40 relative to the first body 31, thereby reducing the risk of the conductive part 40 leaving the accommodating cavity 310.

[0143] In some embodiments, there are two buckles 31A, which are respectively located on the outer surface of the first wall 311 and the outer surface of the second wall 312. The buckle 31A is provided with a guide surface on the side away from the first surface 51, and the guide surface abuts against the notch of the slot 52 and moves toward the bottom of the slot 52 to guide the first wall 311 and the second wall 312 to move toward each other.

[0144] The first connecting portion 313 is a portion of the first body 31 used to connect the first wall 311 and the second wall 312 .

[0145] In some embodiments, both ends of the first connection portion 313 in the third direction Z are flush with both ends of the first wall 311 in the third direction Z, and both ends of the first connection portion 313 in the third direction Z are flush with both ends of the second wall 312 in the third direction Z. This allows the first connection portion 313 to have sufficient connection areas with the first wall 311 and the second wall 312, respectively, thereby improving the connection strength between the first connection portion 313 and the first wall 311, and improving the connection strength between the first connection portion 313 and the second wall 312.

[0146] In some embodiments, the first connecting portion 313 connects an end of the first wall 311 away from the bottom wall 111 and an end of the second wall 312 away from the bottom wall 111 .

[0147] In this embodiment, the first wall 311 and the second wall 312 are arranged at intervals along the first direction X to form a accommodating cavity 310 between the first wall 311 and the second wall 312, so that the first wall 311 or the second wall 312 is arranged between the portion of the conductive member 40 accommodated in the accommodating cavity 310 and the battery cell assembly 20 adjacent to it in the first direction X, so that the battery cell assembly 20 and the conductive member 40 can have independent working spaces from each other, reducing the risk of mutual interference between adjacent battery cell assemblies 20 and conductive members 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 isolation member 30.

[0148] According to some embodiments of this application, please refer to Figure 5 and Figure 6 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.

[0149] “A first protrusion 3111 is provided on a side of the first wall 311 facing the second wall 312 ” can be understood as that a first protrusion 3111 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.

[0150] “A second protrusion 3121 is provided on a side of the second wall 312 facing the first wall 311 ” may be understood as that a second protrusion 3121 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.

[0151] In some embodiments, the first protrusion 3111 and the second protrusion 3121 are interference-fitted 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 interference-fitted with the conductive member 40 to limit the movement of the conductive member 40, and 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 interference-fitted with the conductive member 40, on the one hand, reducing the risk of cracking of the first wall 311 and the second wall 312; on the other hand, reducing the reaction force provided by the first wall 311 and the second wall 312 due to deformation when assembling the conductive member 40 and the insulating isolation member 30, thereby facilitating the assembly of the conductive member 40 and the insulating member.

[0152] 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 .

[0153] In some embodiments, a plurality of first protrusions 3111 are arranged at intervals along the second direction Y, and / or a plurality of second protrusions 3121 are arranged at intervals along the second direction Y.

[0154] In this embodiment, the first protrusion 3111 and / or the second protrusion 3121 are in contact with the conductive member 40 to restrict the movement of the conductive member 40 when the conductive member 40 and the battery device 100 are assembled and used. The structure is simple and easy to implement.

[0155] According to some embodiments of this 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.

[0156] In some embodiments, the two ends of one of the two conductive members 40 are respectively connected to the current output end of the control box 60 and the current input end of the power-consuming body, and the two ends of the other of the two conductive members 40 are respectively connected to the current input end of the control box 60 and the current output end of the power-consuming body to form a loop between the control box 60 and the power-consuming body.

[0157] In the present embodiment, there are multiple conductive members 40 so as to electrically connect the two electrode ends of the control box 60 and the current inflow end and outflow end of the power body of the power-consuming device respectively; the two conductive members 40 are arranged along the second direction Y, and then relative to the situation where the two conductive members 40 are arranged along the first direction X, the insulating isolation member 30 can accommodate the two conductive members 40 under the premise of having a smaller size in the first direction X, thereby reducing the space occupied by the battery cell assembly 20 and the insulating isolation member 30 in the first direction X, thereby reducing the size of the electrical device in the first direction X, and more reasonably using the space in the second direction Y in the box body 10, which is beneficial to improving the energy density of the battery device 100.

[0158] According to some embodiments of this application, please refer to Figure 5 There are two conductive members 40 , and the first connecting portion 313 separates the accommodating cavity 310 into a first accommodating cavity 310A and a second accommodating cavity 310B arranged along the second direction Y. The two conductive members 40 are respectively accommodated in the first accommodating cavity 310A and the second accommodating cavity 310B.

[0159] In some embodiments, the first connection portion 313 is disposed between the two conductive members 40 along the second direction Y, and the two ends of the first connection portion 313 in the third direction Z are respectively flush with the two ends of the first wall 311 in the third direction Z, and the two ends of the first connection portion 313 in the third direction Z are respectively flush with the two ends of the second wall 312 in the third direction Z, so as to form a mutually independent first accommodation cavity 310A and a second accommodation cavity 310B. The first accommodation cavity 310A is enclosed by the side of the first connection 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; the first accommodation cavity 310A is enclosed by the side of the first connection 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.

[0160] In some embodiments, the connecting member is made of insulating material to insulate and isolate the two conductive members 40 , thereby improving the reliability of the battery.

[0161] In this embodiment, the first connecting portion 313 separates 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, that is, the first connecting portion 313 isolates the two conductive members 40, thereby enabling the two conductive members 40 to have independent working spaces, thereby reducing the risk of mutual interference between two adjacent conductive members 40 and improving the reliability of the battery device 100.

[0162] According to some embodiments of this application, please refer to Figure 5 A first opening is formed on a side of the first accommodating cavity 310A away from the second accommodating cavity 310B, and a second opening is formed on a side of the second accommodating cavity 310B away from the first accommodating cavity 310A.

[0163] In some embodiments, the first accommodating cavity 310A is in the shape of a groove that passes through the first body 31 along the third direction Z, and the first opening is the groove of the first accommodating cavity 310A, and / or, the second accommodating cavity 310B is in the shape of a groove that passes through the first body 31 along the third direction Z, and the second opening is the groove of the second accommodating cavity 310B.

[0164] In this embodiment, the first accommodating cavity 310A has a first opening, so that it is convenient to insert the conductive component 40 into the first accommodating cavity 310A through the first opening, and then it is convenient to assemble the conductive component 40 in the first accommodating cavity 310A; the second accommodating cavity 310B has a second opening, so that it is convenient to insert the conductive component 40 into the second accommodating cavity 310B through the second opening, and then it is convenient to assemble the conductive component 40 in the second accommodating cavity 310B; at the same time, since the first opening is located on the side of the first accommodating cavity 310A away from the second accommodating cavity 310B, and the second opening is located on the side of the second accommodating cavity 310B away from the first accommodating cavity 310A, the first opening and the second opening are located on opposite sides of the first main body 31, thereby reducing the risk of mutual interference between the two conductive components 40 when assembling them.

[0165] According to some embodiments of this application, please refer to Figure 6 There are two conductive members 40 , 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 away from the bottom wall 111 .

[0166] In an embodiment where the bottom wall 111 is arranged on the first box body 11, a third opening is formed on the side of the accommodating cavity 310 away from the bottom wall 111 so 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 accommodating cavity 310 through the opening of the first box body 11 and through the third opening.

[0167] In some embodiments, the accommodating cavity 310 is in the shape of a groove penetrating the first body 31 along the third direction Z, and the third opening is a notch of the accommodating cavity 310 .

[0168] In this embodiment, a third opening is formed on a side of the accommodating cavity 310 away from the bottom wall 111 , so that the conductive member 40 can be inserted into the accommodating cavity 310 through the third opening, thereby facilitating the assembly of the conductive member 40 in the accommodating cavity 310 .

[0169] According to some embodiments of this application, please refer to Figure 6 The cavity wall of the accommodating cavity 310 is provided with a third protrusion 314 . Along the second direction Y, the third protrusion 314 is at least partially located between the two conductive members 40 .

[0170] In some embodiments, the first wall 311 is provided with a third protrusion 314 protruding from the surface along the first direction X on the surface facing the second wall 312 in the first direction X, and / or the second wall 312 is provided with a third protrusion 314 protruding from the surface along the first direction X on the surface facing the first wall 311 in the first direction X.

[0171] “The third protrusion 314 is at least partially located between the two conductive members 40 ” may be understood as a portion of the third protrusion being located between the two conductive members 40 , or the entire third protrusion being located between the two conductive members 40 .

[0172] Specifically, when the two conductive members 40 tend to move toward each other along the second direction Y, the third protrusion abuts against the conductive member 40 to limit the movement of the two conductive members 40 toward each other.

[0173] In this embodiment, the third protrusion 314 is at least partially located between the two conductive members 40, so that when the two conductive members 40 tend to move toward each other, the third protrusion 314 can abut against them to limit the movement of the two conductive members 40 toward each other, thereby reducing the risk of mutual interference between two adjacent conductive members 40 and improving the reliability of the battery device 100.

[0174] According to some embodiments of this application, please refer to Figure 5 and Figure 6 The first body 31 further includes a third wall 315 and a fourth wall 316. The third wall 315 is connected to an 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 an end of the second wall 312 away from the bottom wall 111, and the fourth wall 316 overlaps the first surface 51.

[0175] The third wall 315 and the fourth wall 316 are overlapping portions of the first body 31 and the first surface 51 .

[0176] 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 overlap area of ​​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 body 31 and the structural beam 50; on the other hand, the size of the third wall 315 and the portion of 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 body 31 in the second direction Y.

[0177] 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.

[0178] In some embodiments, the third wall 315 is connected to the second box body 12 by bolt locking, gluing, foam support, etc., and / or the fourth wall 316 is connected to the second box body 12 by bolt locking, gluing, foam support, etc., to provide support force to the second box body 10, thereby improving the structural strength of the box body 10.

[0179] In this embodiment, the third wall 315 is overlapped on the first surface 51; and / or the fourth wall 316 is connected to the end of the second wall 312 away from the bottom wall 111, and the fourth wall 316 is overlapped on the first surface 51, so that the structural beam 50 can provide support 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 is subjected to 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 subjected to external force, so that the conductive member 40 has a relatively stable working space, thereby improving the reliability of the battery device 100.

[0180] According to some embodiments of this 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.

[0181] Exemplarily, the third wall 315 and the structural beam 50 are detachably connected by means including but not limited to a latch connection, a snap 31A connection and a flange connection; the fourth wall 316 and the structural beam 50 are detachably connected by means including but not limited to a latch connection, a snap 31A connection and a flange connection.

[0182] In some embodiments, the battery device 100 further includes a fastener, a first through hole penetrating the third wall 315 along the second direction Y is provided on the third wall 315, 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 along the second direction Y; and / or, a second through hole penetrating the fourth wall 316 along the second direction Y is provided on the fourth wall 316, 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 along the second direction Y. It should be noted that the fastener may be a bolt.

[0183] 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, thereby facilitating the installation and disassembly of the first body 31 and the structural beam 50, and facilitating the assembly and maintenance of the battery device 100.

[0184] According to some embodiments of this application, please refer to Figure 6The insulating spacer 30 further includes a second body 32, one end of the second body 32 is connected to the first body 31 along the second direction Y, and the other end of the second 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, and on 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.

[0185] The second body 32 is a portion of the insulating spacer 30 used to connect the bottom wall 111 and the first body 31 .

[0186] Exemplarily, the first body 31 and the second body 32 may be non-detachably connected by means of integral molding, welding, etc., or may be detachably connected by means of bolt connection, clamping, etc.

[0187] In some embodiments, the first connecting portion 313 separates 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. The second main body 32 can be formed by extending at least one of the first wall 311 and the second wall 312 toward the direction close to the bottom wall 111.

[0188] In some embodiments, the first body 31 is connected to the second box body 12 by bolt locking, gluing, foam support, etc., and the second body 32 is connected to the bottom wall 111 by bolt locking, gluing, foam support, etc.

[0189] The pressure relief mechanism 213 refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature or other conditions of the battery cell 21 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte and isolation membrane in the battery cell 21. The pressure relief mechanism 213 can take the form of an explosion-proof valve, an air 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 or temperature or other conditions of the battery cell 21 reaches a predetermined threshold, the pressure relief mechanism 213 performs an action or a weak structure provided in the pressure relief mechanism 213 is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0190] The "actuation" mentioned in the embodiments of the present application refers to the pressure relief mechanism 213 being in action or being activated to a certain state, so that the internal pressure and temperature of the battery cell 21 can be released, so that the internal pressure and temperature of the battery cell 21 can be released. The action produced by the pressure relief mechanism 213 may include but is not limited to: at least a part of the pressure relief mechanism 213 is broken, shattered, melted, torn or opened, and the like. When the pressure relief mechanism 213 is actuated, the high-temperature and high-pressure substances inside the battery cell 21 will be discharged from the actuated part as emissions. In this way, the battery cell 21 can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0191] It can be understood that the pressure relief mechanism 213 is arranged on the side of the battery cell 21 facing the insulating spacer 30, so that when the pressure relief mechanism 213 is braked, the discharge moves along the first direction X toward the adjacent battery cell assembly 20. Since the insulating spacer 30 is located between the adjacent battery cell assemblies 20, and on the plane perpendicular to the second direction Y, the orthographic projection of the insulating spacer 30 overlaps with the orthographic projection of the pressure relief mechanism 213 at least partially. Therefore, the overlapping part of the orthographic projection of the insulating spacer 30 and the orthographic projection of the pressure relief mechanism 213 can limit the discharge from contacting the adjacent battery cell assembly 20, thereby reducing the risk of thermal runaway transmission.

[0192] In some embodiments, the insulating spacer 30 includes a first body 31 and a second body 32, the first 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 body 31 is connected to the second box 10, and one end of the second body 32 is connected to the other end of the first body 31, so as to limit the emission from entering the receiving cavity 310 through the gap between the second box 10 and the first body 31 in the second direction Y. The other end of the second body 32 is connected to the bottom wall 111, and on a plane perpendicular to the second direction Y, the orthographic projection of the second 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 emission from moving directly in the direction close to the conductive member 40.

[0193] In some embodiments, the insulating spacer 30 may be made of a heat-resistant material to reduce the risk of the discharge melting the insulating spacer 30 and damaging the conductive member 40 .

[0194] In this embodiment, 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, so that the bottom wall 111 can provide a supporting force to the first body 31 through the second body 32, thereby further reducing the vibration amplitude of the first body 31 when subjected to external force, so that the conductive member 40 has a relatively stable working space, thereby improving the reliability of the battery device 100; on 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, so that when the battery cell 21 has thermal runaway and the pressure and temperature in the battery cell 21 are reduced by discharging the emission through the pressure relief mechanism 213, the insulating isolation member 30 blocks the emission to a certain extent, so as to reduce the risk that the emission falls on the battery cell 21 arranged opposite to the battery cell 21 having thermal runaway in the first direction X, resulting in a short circuit of the battery cell 21 arranged opposite to the battery cell 21 having thermal runaway in the first direction X, thereby improving the reliability of the battery device 100.

[0195] According to some embodiments of this 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, 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 of the blocking portion 321 in the first direction X, and the second connecting portion 322 is connected to the bottom wall 111.

[0196] The blocking portion 321 is a wall portion of the second body 32 for connecting with the first body 31. Exemplarily, the thickness direction of the blocking portion 321 is parallel to the first direction X.

[0197] The second connecting portion 322 is a wall portion of the second body 32 that connects the blocking portion 321 and the bottom wall 111 .

[0198] 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 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 of the second connecting portion 322 in the first direction X.

[0199] In this embodiment, the second connection portion 322 protrudes from the side of the blocking portion 321 in the first direction X, and the second connection 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 connection portion 322 can increase the area where the second main body 32 is connected to the bottom wall 111, thereby improving the connection strength between the second main body 32 and the bottom wall 111.

[0200] According to some embodiments of this application, please refer to Figure 4 , along the first direction X, there is a gap between the blocking portion 321 and the pressure relief mechanism 213 .

[0201] 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, the blocking portion 321, the bottom wall 111 and the battery cell assembly 20 form a channel. The above-mentioned channel can guide the high-temperature airflow rushing out of the pressure relief mechanism 213 along the second direction Y when thermal runaway occurs in the battery cell 21, so as to guide and divert the high-temperature airflow, thereby relieving the high-temperature airflow rushing out of the pressure relief mechanism 213, so as to alleviate the impact force of the high-temperature airflow on the adjacent battery cell assembly 20, which is beneficial to reduce the transmission of thermal runaway, so as to improve the reliability of the battery device 100.

[0202] According to some embodiments of this application, please refer to Figure 3 The two ends of the second body 32 in the third direction Z are respectively connected to the two structural beams 50 .

[0203] Exemplarily, two ends of the second body 32 that are opposite to each other in the third direction Z are connected to the two structural beams 50 by bolt locking, gluing, foam support, etc.

[0204] In this embodiment, the second main body 32 is connected to two structural beams 50 at both ends in the third direction Z, respectively, thereby increasing the connection area between the insulating isolation member 30 and the structural beam 50 compared to the situation where only the first main body 31 of the insulating isolation member 30 is connected to the structural beam 50, thereby further improving the reliability of the connection between the insulating isolation member 30 and the structural beam 50.

[0205] According to some embodiments of this application, please refer to Figure 4-Figure 6 , and please refer to Figure 7 , Figure 7 A schematic diagram of the structure of a battery cell 21 provided in some embodiments of the present application. The battery cell assembly 20 includes a plurality of battery cells 21 arranged along a third direction Z, an electrode terminal 212 is provided on one side of the battery cell 21 facing the insulating 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, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0206] In this embodiment, the battery cell assembly 20 includes a plurality of battery cells 21 arranged along a 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. Therefore, when the battery cell 21 expands, the battery cells 21 adjacent to each other in the third direction Z can limit the expansion of the battery cell 21 in the third direction Z, thereby improving the reliability of the battery device 100.

[0207] According to some embodiments of this application, please refer to Figure 4-Figure 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 away from the bottom wall 111 .

[0208] It can be understood that along the second direction Y, the insulating isolation member 30 and the conductive member 40 do not protrude from the side of the battery cell assembly 20 away from the bottom wall 111, so that there is no need to set an avoidance structure opposite to the insulating isolation member 30 and the conductive member 40 on the wall portion of the box body 10 opposite to the bottom wall 111 along the second direction Y, so that the wall portion of the box body 10 opposite to the bottom wall 111 along the second direction Y can have a certain flatness, so that when the battery device 100 is used in an electrical device, taking the vehicle 1000 or a transportation device with the battery device 100 installed on the chassis as an example, the chassis equipped with the battery device 100 can be free from the need to set a structure to avoid the box body 10, thereby making the chassis of the electrical device have a certain flatness, thereby improving the comfort of the passengers.

[0209] In some embodiments, the insulating spacer 30 is connected along the second direction Y to a 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.

[0210] In this embodiment, along the second direction Y, the insulating isolation member 30 and the conductive member 40 do not protrude from the side of the battery cell assembly 20 away from the bottom wall 111, so that the wall portion of the box body 10 arranged opposite to the bottom wall 111 in the second direction Y does not need to be provided with an avoidance structure for avoiding the electrode terminal 212 and the busbar connecting the electrode terminal 212, thereby simplifying the structure of the box body 10 and facilitating the manufacture of the box body 10.

[0211] According to some embodiments of the present application, the insulating spacer 30 is made of at least one of epoxy resin, polytetrafluoroethylene, and polyimide.

[0212] In this embodiment, the insulating isolation member 30 is made of the above-mentioned materials. On the one hand, the insulating isolation member 30 can be made by one-piece injection molding, which reduces the manufacturing cost of the insulating isolation member 30; on the other hand, the insulating isolation member 30 has a certain insulation property, thereby reducing the risk of short circuit between the two battery components.

[0213] According to some embodiments of this application, please refer to Figure 2 The battery device 100 also 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; wherein the conductive member 40 is used to electrically connect the control box 60 and the connector 70.

[0214] The control box 60 is a control unit electrically connected to the output pole and used to distribute the energy of the battery cell assembly 20 in the battery device 100 . The control box 60 is electrically connected to the battery cell assembly 20 to distribute high voltage to the battery device 100 .

[0215] The connector 70 is used to electrically connect to an electrical body of an electrical device.

[0216] In this embodiment, the conductive member 40 is used to electrically connect the control box 60 and the connector 70 , so that the power-consuming body of the power-consuming device is electrically connected to the battery device 100 through the connector 70 .

[0217] According to some embodiments of the present application, the present application further provides an electric device, which includes the battery device 100 of any of the above schemes, and the battery cell 21 device is used to provide electric energy to the electric device.

[0218] According to some embodiments of the present application, see Figures 2 to 7As shown, the present application provides a battery device 100 including a box 10, a battery cell assembly 20, an insulating spacer 30 and a conductive member 40; the box 10 includes a bottom wall 111; at least two battery cell assemblies 20 are arranged in the box 10 and spaced along the first direction X, the bottom wall 111 supports the battery cell assembly 20 along the second direction Y, the battery cell assembly 20 includes at least one battery cell 21, and the battery cells 21 in two adjacent battery cell assemblies 20 are provided with electrode terminals 212 on the opposite sides, the first direction X is perpendicular to the second direction Y; along the first direction X, the insulating spacer 30 is arranged between two adjacent battery cell assemblies 20; at least 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 of the battery cell assembly 20 (not shown in the figure). 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 are arranged at intervals along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; wherein the battery cell assembly 20 is arranged between the two structural beams 50, and the insulating spacer 30 extends along the third direction Z, and the two 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 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. A buckle 31A is formed on at least one side of the insulating spacer 30 along the first direction X, and a snap-fitting groove 521 is formed on the groove wall surface of the slot 52, and the buckle 31A cooperates with the snap-fitting groove 521 to limit the insulating spacer 30 from leaving 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 isolating member 30 includes a first body 31, part of which is accommodated in the slot 52; the first body 31 has an accommodating cavity 310 inside, and the conductive member 40 is at least partially accommodated in the accommodating cavity 310. 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 arranged at intervals along the first direction X, the accommodating 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 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 insulating spacer 30 also includes a second body 32, one end of the second body 32 is connected to the first body 31 along the second direction Y, 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, one end of the blocking portion 321 is connected to the first body 31 along the second direction Y, 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 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 the side of the battery cell 21 facing the insulating isolation member 30, and on 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 the 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 insulating isolation member 30 and the conductive member 40 do not protrude from the side of the battery cell assembly 20 away from the bottom wall 111. A pressure relief mechanism 213 is provided on the side of the battery cell 21 facing the insulating isolation member 30. On a plane perpendicular to the second direction Y, the orthographic projection of the insulating isolation member 30 at least partially overlaps with the orthographic projection of the pressure relief mechanism 213. The battery device 100 further includes a control box 60 and a connector 70 ; the control box 60 is disposed in the housing 10 and electrically connected to the battery cell assembly 20 ; the connector 70 is disposed on the wall of the housing 10 ; wherein the conductive member 40 is used to electrically connect the control box 60 and the connector 70 .

[0219] In some embodiments, the first connecting portion 313 separates 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. The first accommodating cavity 310A forms a first opening on one side away from the second accommodating cavity 310B, and the second accommodating cavity 310B forms a second opening on one side away from the first accommodating cavity 310A.

[0220] 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 away from the bottom wall 111. The cavity wall of the accommodating cavity 310 is provided with a third protrusion 314, and along the second direction Y, the third protrusion 314 is at least partially located between the two conductive members 40.

[0221] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0222] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body, including a bottom wall; At least two battery monomer assemblies are disposed in the box and spaced apart along a first direction, the bottom wall supports the battery monomer assemblies along a second direction, and the first direction is perpendicular to the second direction; An insulating spacer, arranged between two adjacent battery cell assemblies along the first direction; 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 is arranged toward the insulating spacer; The conductive member is at least partially disposed in the insulating isolation member, and the conductive member is electrically connected to the output pole of the battery cell assembly.

2. The battery device according to claim 1, characterized in that The battery device further comprises: Two structural beams are arranged in the box body and spaced apart along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other; Wherein, the battery cell assembly is arranged between the two structural beams, the insulating spacer extends along the third direction, and the 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, characterized in that: The structural beam has a first surface facing away from the bottom wall, and a portion of the first surface is recessed to form a slot for the insulating spacer to be inserted.

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 escaping 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 comprises a first body, a portion of which is accommodated in the slot; The first body has an accommodating cavity inside, and the conductive member is at least partially accommodated in the accommodating cavity.

7. The battery device according to claim 6, characterized in that: 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. The accommodating cavity is formed between the first wall and the second wall. 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 provided on a 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 a 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: There are multiple conductive elements, and the multiple conductive elements 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 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.

11. The battery device according to claim 10, characterized in that: A first opening is formed on a side of the first accommodating cavity away from the second accommodating cavity, and a second opening is formed on a side of the second accommodating cavity away from the first accommodating cavity.

12. The battery device according to claim 9, characterized in that: There are two conductive members, 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 one side of the accommodating cavity away from the bottom wall.

13. The battery device according to claim 12, characterized in that: A third protrusion is provided on the cavity wall of the accommodating cavity. Along the second direction, the third protrusion is at least partially located between the two conductive members.

14. The battery device according to claim 7, characterized in that: The first body also includes: A third wall is connected to an end of the first wall away from the bottom wall, and the third wall overlaps the first surface; and / or, A fourth wall is connected to an end of the second wall away from the bottom wall, and the fourth wall overlaps the first surface.

15. The battery device according to claim 14, characterized in that: 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, characterized in that: The insulating spacer also includes: A second body, along the second direction, one end of the second body is connected to the first body, and the other end of the second body is connected to the bottom wall; A pressure relief mechanism is provided on one side of the battery cell facing the insulating spacer, and on a plane perpendicular to the first direction, the orthographic projection of the second 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, and the other end of the blocking portion is connected to the second connecting portion. The second connecting portion protrudes from the side 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, characterized in that: Along the first direction, there is a gap between the blocking portion and the pressure relief mechanism.

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

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

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

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

23. The battery device according to claim 1, wherein: The battery device further comprises: A control box, disposed in the box body and electrically connected to the battery monomer assembly; A connector, arranged on the wall of the box; Wherein, the conductive member is used to electrically connect the control box and the connector.

24. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 23, wherein the battery device is used to provide electrical energy.

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