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, the box body comprises a box body and a partition beam, the partition beam is arranged in an accommodating cavity and divides the interior of the box body into a first sub-accommodating cavity and a second sub-accommodating cavity which are arranged in a first direction, and the first sub-accommodating cavity and the second sub-accommodating cavity are arranged in a second direction; the first battery monomer assembly is arranged in the first sub-accommodating cavity, and a third flow channel for accommodating a heat exchange medium is formed in the partition beam; the multiple first heat management parts are arranged in the first sub-containing cavity at intervals in the first direction, a first battery single body is arranged between every two first heat management parts, a first flow channel used for containing a heat exchange medium is formed in each first heat management part, and the first flow channels communicate with the third flow channels; one end of the first medium input pipe is connected to one, farthest from the partition beam, of the multiple first heat management components; and one end of the third medium output pipe is connected to the separation beam. According to the technical scheme provided by the invention, the reliability of the battery device can be improved.

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 energy density of the battery device, improving the reliability of the battery device during use is also an issue that needs to be considered.

[0004] Therefore, how to improve the reliability 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 reliability of the battery device.

[0006] In a first aspect, an embodiment of the present application provides a battery device, comprising a first battery cell assembly, a second battery cell assembly and a box, a first thermal management component, a first current collector, a first connecting tube, a second connecting tube, a first medium input tube and a third medium output tube; the first battery cell assembly comprises a plurality of first battery cells; the second battery cell assembly comprises a plurality of second battery cells; the box comprises a box body and a partition beam, the box body having a accommodating cavity, the partition beam being arranged in the accommodating cavity and dividing the accommodating cavity into a first sub-accommodating cavity and a second sub-accommodating cavity arranged along a first direction, the first battery cell assembly being arranged in the first sub-accommodating cavity, the second battery cell assembly being arranged in the second sub-accommodating cavity, and a third flow channel for accommodating a heat exchange medium being formed inside the partition beam; a plurality of first thermal management components are arranged in the first sub-accommodating cavity at intervals along the first direction, and at least one heat exchange medium is arranged between two adjacent first thermal management components. A first battery cell, a first flow channel for accommodating a heat exchange medium is formed inside the first thermal management component, and the first flow channel is connected to the third flow channel; a first current collector is arranged at one end of the first thermal management component in the second direction, the first current collector has a first medium inlet and a first medium outlet, and the first direction is perpendicular to the second direction; a first connecting pipe is arranged in the first sub-accommodating cavity, for connecting the first medium inlets of two adjacent first current collectors; a second connecting pipe is arranged in the first sub-accommodating cavity, for connecting the first medium outlets of two adjacent first current collectors; one end of the first medium input pipe is connected to the one of the multiple first thermal management components that is farthest from the partition beam; one end of the third medium output pipe is connected to the partition beam; wherein the surface with the largest area of ​​the first battery cell and the surface with the largest area of ​​the second battery cell are both perpendicular to the first direction.

[0007] In the above technical solution, the surface with the largest area of ​​the first battery cell and the surface with the largest area of ​​the second battery cell are set to be perpendicular to the first direction, so that the main expansion direction of the first battery cell and the main expansion direction of the second battery cell are set in line and parallel to the first direction. Compared with the situation that the surface with the largest area of ​​the first battery cell and the surface with the largest area of ​​the second battery cell are set to be perpendicular to the second direction, so that the main expansion direction of the first battery cell is parallel to the main expansion direction of the second battery cell and parallel to the second direction, on the one hand, the two opposite sides of the partition beam in the first direction bear the expansion force of the first battery cell and the expansion force of the second battery cell respectively, so that while limiting the expansion of the first battery cell and the second battery cell, the partition beam is subjected to more uniform force, reducing the risk of deformation of the partition beam, thereby improving the reliability of the battery device; on the other hand, the risk of uneven force and local deformation caused by different parts of the wall of the box body in the second direction abutting against the first battery cell and the second battery cell respectively is reduced, so that the box can provide a more stable working environment for the first battery cell assembly and the second battery cell assembly, thereby improving the reliability of the battery device. By setting a third flow channel for accommodating a heat exchange medium in the partition beam, the partition beam can adjust the temperature of the first battery cell adjacent to it, thereby reducing the first thermal management component, and further reducing the space occupied by multiple first thermal management components and the partition beam in the accommodating cavity, which is conducive to improving the volume energy density of the battery device. Multiple first thermal management components are arranged in the first sub-accommodating cavity at intervals along the first direction, and at least one first battery cell is arranged between two adjacent first thermal management components to adjust the temperature of the first battery cell, reducing the risk of thermal runaway of the first battery cell assembly and improving the reliability of the battery device. The heat exchange medium flows into the multiple first thermal management components through the first medium input pipe and flows out of the third flow channel through the third medium output pipe; thereby, the flow length of the heat exchange medium flowing through any first thermal management component is the same, so that the heat exchange medium flowing through any first thermal management component is subjected to the same flow resistance, and further, the flow rate of the heat exchange medium in any first thermal management component is the same, so that the first thermal management component can more evenly adjust the heat of the first battery cell in the first battery cell assembly, reduce the risk of uneven heat distribution in the first battery cell assembly, and improve the reliability of the first battery cell assembly.

[0008] In some embodiments, the battery device also includes a second thermal management component; a plurality of second thermal management components are arranged in the second sub-containing cavity at intervals along the first direction, at least one second battery cell is arranged between two adjacent second thermal management components, and a second flow channel for accommodating a heat exchange medium is formed inside the second thermal management component.

[0009] In the above technical solution, a plurality of second thermal management components are arranged in the second sub-accommodation cavity at intervals along the first direction, and at least one second battery cell is arranged between two adjacent second thermal management components to regulate the temperature of the second battery cell, thereby reducing the risk of thermal runaway of the second battery cell assembly and improving the reliability of the battery device.

[0010] In some embodiments, the battery device further includes a second current collector; the second current collector is disposed at one end of the second thermal management component in the second direction, and the second current collector has a second medium inlet and a second medium outlet.

[0011] In the above technical solution, the second current collector is arranged at one end of the second thermal management component in the second direction, and the second medium inlet and the second medium outlet are both arranged on the second current collector, so as to facilitate the arrangement of the pipeline connected to the second medium inlet and the second medium outlet at one end of the second thermal management component, thereby facilitating the arrangement of the supply pipeline of the heat exchange medium of the second thermal management component.

[0012] In some embodiments, on a plane perpendicular to the first direction, an orthographic projection of the first current collector and an orthographic projection of the second current collector at least partially overlap.

[0013] In the above technical solution, on a plane perpendicular to the first direction, the orthographic projection of the first current collector and the orthographic projection of the second current collector at least partially overlap, so that the first current collector and the second current collector are close to the same end of the box body in the second direction, so as to facilitate setting the heat exchange medium inlet pipe and the heat exchange medium outlet pipe of the battery device on the same side of the box body, which is beneficial to realize the setting of the heat exchange medium and electrical connection on different sides of the battery device, thereby facilitating improving the reliability of the battery device.

[0014] In some embodiments, the battery device also includes a third connecting tube and a fourth connecting tube; the third connecting tube is arranged in the second sub-accommodating cavity, and is used to connect the second medium inlets of two adjacent second current collectors; the fourth connecting tube is arranged in the second sub-accommodating cavity, and is used to connect the second medium outlets of two adjacent second current collectors.

[0015] In the above technical solution, the third connecting pipe is used to connect the second medium inlets of two adjacent second current collectors, and the fourth connecting pipe is used to connect the second medium outlets of two adjacent second current collectors, thereby realizing the connection of the second flow channels of multiple second thermal management components, and the structure is simple and easy to implement.

[0016] In some embodiments, the first connecting tube and the second connecting tube are arranged along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the third connecting tube and the fourth connecting tube are arranged along the third direction.

[0017] In the above technical solution, the first connecting tube and the second connecting tube are arranged along the third direction, thereby fully utilizing the space of the first sub-containing cavity in the third direction, improving the utilization rate of the space inside the box, and being beneficial to improving the volume energy density of the battery device; the third connecting tube and the fourth connecting tube are arranged along the third direction, thereby fully utilizing the space of the second sub-containing cavity in the third direction, improving the utilization rate of the space inside the box, and being beneficial to improving the volume energy density of the battery device.

[0018] In some embodiments, the size of the first sub-accommodating cavity along the first direction is smaller than the size of the first sub-accommodating cavity along the second direction, and the size of the second sub-accommodating cavity along the first direction is smaller than the size of the second sub-accommodating cavity along the second direction.

[0019] In the above technical solution, the size of the first sub-accommodation chamber along the first direction is smaller than the size of the first sub-accommodation chamber along the second direction, and the first connecting tube and the second connecting tube connect the first thermal management components adjacent to each other along the first direction. Thus, relative to the case where multiple first thermal management components are arranged along the second direction and the first connecting tube and the second connecting tube connect the first thermal management components adjacent to each other along the second direction, the length of the first connecting tube and the second connecting tube is reduced, thereby reducing the volume of the first connecting tube and the second connecting tube, so that more space in the first sub-accommodation chamber can be used to accommodate the first battery monomer, thereby facilitating the improvement of the volume energy density of the battery device; the size of the second sub-accommodation chamber along the first direction is smaller than the size of the first sub-accommodation chamber along the second direction, and the third connecting tube and the fourth connecting tube connect the second thermal management components adjacent to each other along the first direction. Thus, relative to the case where multiple second thermal management components are arranged along the second direction and the third connecting tube and the fourth connecting tube connect the second thermal management components adjacent to each other along the second direction, the length of the third connecting tube and the fourth connecting tube is reduced, thereby reducing the volume of the third connecting tube and the fourth connecting tube, so that more space in the second sub-accommodation chamber can be used to accommodate the second battery monomer, thereby facilitating the improvement of the volume energy density of the battery device.

[0020] In some embodiments, the first flow channel includes a first sub-channel and a second sub-channel, the first sub-channel and the second sub-channel both extend along the second direction, one end of the first sub-channel is connected to the first medium inlet, one end of the second sub-channel is connected to the first medium outlet, and the other end of the first sub-channel is connected to the other end of the second sub-channel.

[0021] In the above technical solution, by setting the first flow channel to include a first sub-flow channel and a second sub-flow channel, and making one end of the first sub-flow channel connected to the first medium inlet, one end of the second sub-flow channel connected to the first medium outlet, and the other end of the first sub-flow channel connected to the other end of the second sub-flow channel, the heat exchange medium can flow out from the first medium outlet on the same side as the first medium inlet after flowing into the first flow channel through the first medium inlet. The structure is simple and easy to implement.

[0022] In some embodiments, there are multiple first sub-channels arranged along a third direction, a first cavity and a first guide channel are provided in the first current collector, the first cavity is connected to the multiple first sub-channels, the first guide channel is used to connect the first medium inlet and the first cavity, and the first direction, the second direction and the third direction are perpendicular to each other; wherein, the extension direction of the first guide channel forms an angle with the second direction.

[0023] In the above technical solution, the extension direction of the first flow channel forms an angle with the second direction, that is, the extension direction of the first flow channel forms an angle with the extension direction of the first sub-flow channel. Therefore, relative to the situation where the extension direction of the first flow channel is parallel to the second direction, the risk of the heat exchange medium entering the first cavity from the first flow channel directly flowing into the first sub-flow channel that is colinear or adjacent to the first flow channel, resulting in too little heat exchange medium in the first flow channel away from the first flow channel, is reduced, thereby improving the reliability of the battery device.

[0024] In some embodiments, the second flow channel and the third flow channel are connected to each other.

[0025] In the above technical solution, the first flow channel, the second flow channel and the third flow channel are interconnected, thereby facilitating the flow of the heat exchange medium between the first thermal management component, the second thermal management component and the partition beam, and facilitating the setting of the medium input pipe and the medium output pipe.

[0026] In some embodiments, the battery device further includes a second medium input pipe; one end of the second medium input pipe is connected to one of the plurality of second thermal management components that is farthest from the partition beam.

[0027] In the above technical solution, one end of the second medium input pipe is connected to the one of the multiple second thermal management components that is farthest from the partition beam, and one end of the third medium output pipe is connected to the partition beam, so that it is convenient to collect the heat exchange medium flowing out of the first thermal management component and the medium flowing out of the second thermal management component from the third medium output pipe at the same time. The structure is simple and easy to implement.

[0028] In some embodiments, the box body includes a bottom plate and a frame; the bottom plate is used to support the first battery cell assembly and the second battery cell assembly; the frame is arranged around the bottom plate, and the frame and the bottom plate are combined to form the accommodating cavity; wherein the partition beam extends along a second direction, and both ends of the partition beam are connected to the frame, and the second direction is perpendicular to the first direction.

[0029] In the above technical solution, the partition beam extends along the second direction, and both ends of the partition beam are connected to the frame, so that when either of the two frame portions relatively arranged in the second direction of the frame is subjected to external force, the component of force in the second direction can be transmitted to the other through the partition beam, thereby improving the structural strength of the frame; on the other hand, the frame can provide supporting force to both ends of the partition beam respectively, thereby reducing the vibration amplitude of the partition beam when subjected to external force, thereby reducing the risk of a gap between the partition beam and the bottom plate, thereby making the first sub-containing cavity and the second sub-containing cavity relatively isolated, so that when thermal runaway occurs in one of the first battery cell assembly and the second battery cell assembly, the impact on the other is reduced.

[0030] In some embodiments, the frame forms an opening at one end away from the bottom plate in the third direction, and the box body also includes a cover body; the cover body is connected to the frame and closes the opening, and the partition beam is respectively connected to the cover body and the bottom plate.

[0031] In the above technical solution, the partition beam is respectively connected to the cover body and the bottom plate, thereby reducing the risk of hotter air entering the sub-containing cavity where the other is located from the gap between the partition beam and the cover body, and / or the gap between the partition beam and the bottom plate, causing thermal runaway of the other when thermal runaway occurs in one of the first battery cell assembly and the second battery cell assembly.

[0032] In some embodiments, the first battery cell assembly and the second battery cell assembly are connected in series or in parallel.

[0033] In the above technical scheme, when the first battery cell assembly and the second battery cell assembly are connected in series, the operating voltage of the battery device is the sum of the operating voltage of the first battery cell assembly and the operating voltage of the second battery cell assembly, and the operating voltages of the first battery cell assembly and the second battery cell assembly can be reasonably distributed to reduce the severity of thermal runaway of one of the first battery cell assembly and the second battery cell assembly, thereby improving the reliability of the battery device; when the first battery cell assembly and the second battery cell assembly are connected in parallel, the operating current of the battery device is the sum of the operating current of the first battery cell assembly and the working current of the second battery cell assembly, so that when one of the first battery cell assembly and the second battery cell assembly undergoes thermal runaway, the other can continue to supply power to the electrical device, thereby improving the reliability of the battery device during use.

[0034] In a second aspect, an embodiment of the present application provides a battery device, including a first battery cell assembly, a second battery cell assembly and a box, a first thermal management component, a first current collector, a first connecting tube, a second connecting tube, a first medium input tube and a first medium output tube; the first battery cell assembly includes a plurality of first battery cells; the second battery cell assembly includes a plurality of second battery cells; the box includes a box body and a partition beam, the box body has a accommodating cavity, the partition beam is arranged in the accommodating cavity, and divides the accommodating cavity into a first sub-accommodating cavity and a second sub-accommodating cavity arranged along a first direction, the first battery cell assembly is arranged in the first sub-accommodating cavity, and the second battery cell assembly is arranged in the second sub-accommodating cavity; a plurality of first thermal management components are arranged in the first sub-accommodating cavity at intervals along the first direction, at least one of the first battery cells is arranged between two adjacent first thermal management components, and the first and second thermal management components are arranged in the second sub-accommodating cavity. A first flow channel for accommodating a heat exchange medium is formed inside a thermal management component; a first current collector is arranged at one end of the first thermal management component in the second direction, the first current collector has a first medium inlet and a first medium outlet, and the first direction is perpendicular to the second direction; a first connecting pipe is arranged in the first sub-accommodating cavity, for connecting the first medium inlets of two adjacent first current collectors; a second connecting pipe is arranged in the first sub-accommodating cavity, for connecting the first medium outlets of two adjacent first current collectors; one end of the first medium input pipe is connected to the one of the multiple first thermal management components farthest from the partition beam; one end of the first medium output pipe is connected to the one of the multiple first thermal management components closest to the partition beam; wherein the surface of the first battery cell with the largest area and the surface of the second battery cell with the largest area are both perpendicular to the first direction.

[0035] In the above technical solution, a plurality of first thermal management components are arranged in the first sub-accommodation cavity at intervals along the first direction, and at least one first battery cell is arranged between two adjacent first thermal management components to adjust the temperature of the first battery cell, thereby reducing the risk of thermal runaway of the first battery cell assembly and improving the reliability of the battery device. The heat exchange medium flows into the plurality of first thermal management components through the first medium input pipe, and flows out of the first thermal management component through the first medium output pipe; thereby, the flow length of the heat exchange medium flowing through any first thermal management component is the same, thereby making the flow resistance of the heat exchange medium flowing through any first thermal management component the same, and further making the flow rate of the heat exchange medium in any first thermal management component the same, thereby making the first thermal management component able to more evenly adjust the heat of the first battery cell in the first battery cell assembly, reducing the risk of uneven heat distribution in the first battery cell assembly, and improving the reliability of the first battery cell assembly.

[0036] In some embodiments, the battery device also includes a second thermal management component, a second medium input pipe and a second medium output pipe; multiple second thermal management components are arranged in the second sub-containing cavity at intervals along the first direction, at least one second battery cell is arranged between two adjacent second thermal management components, and a second flow channel for accommodating a heat exchange medium is formed inside the second thermal management component; one end of the second medium input pipe is connected to the one of the multiple second thermal management components that is farthest from the partition beam; one end of the second medium output pipe is connected to the one of the multiple second thermal management components that is closest to the partition beam.

[0037] In the above technical solution, the heat exchange medium flows into the multiple second thermal management components through the second medium input pipe, and flows out of the multiple second thermal management components through the second medium output pipe, so that the circulation of the heat exchange medium in the multiple first thermal management components and the multiple second thermal management components is relatively independent, thereby reducing the impact of leakage of one of the first thermal management components and the second thermal management components on the other, thereby improving the reliability of the battery cell.

[0038] In some embodiments, one of the plurality of first thermal management components that is closest to the partition beam abuts against the partition beam; and one of the plurality of second thermal management components that is closest to the partition beam abuts against the partition beam.

[0039] In the above technical solution, one of the multiple first thermal management components that is closest to the partition beam abuts against the partition beam; one of the multiple second thermal management components that is closest to the partition beam abuts against the partition beam. On the one hand, when the one of the multiple first thermal management components that is closest to the partition beam bears the expansion force of the first battery cell, and / or when the one of the multiple second thermal management components that is closest to the partition beam bears the expansion force of the second battery cell, the partition beam can provide support force to it, so as to reduce the risk of deformation of the one of the multiple first thermal management components that is closest to the partition beam, and / or the one of the multiple second thermal management components that is closest to the partition beam, thereby improving the reliability of the battery device.

[0040] In a third aspect, an embodiment of the present application provides an electrical device, comprising a battery device as described in any embodiment of the first aspect and the second aspect, wherein the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] 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 a battery device provided in some embodiments of the present application; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 A cross-sectional view of a first current collector and a first thermal management component provided in an embodiment of the present application; Figure 6 A cross-sectional view of a second current collector and a second thermal management component provided in an embodiment of the present application; Figure 7 An exploded view of the structure of another battery device provided in some embodiments of the present application.

[0043] icon: 1000-vehicle; 100-battery device; 10-box; 11-box body; 110-accommodation chamber; 110A-first sub-accommodation chamber; 110B-second sub-accommodation chamber; 111-bottom plate; 112-frame; 113-cover; 11A-first box body; 11B-second box body; 12-partition beam; 13-third medium output pipe; 20-first battery cell assembly; 21-first battery cell; 30-second battery cell assembly; 31-second battery cell; 40-first thermal management component; 401-first flow channel; 401A-first sub-flow channel; 401B-second sub-flow channel; 401C-first connecting chamber; 41-first current collector; 411-first medium inlet; 412-first medium outlet; 413-first chamber; 414- The second cavity; 415-the first flow guide channel; 416-the second flow guide channel; 42-the first connecting pipe; 43-the second connecting pipe; 44-the first medium input pipe; 45-the first medium output pipe; 50-the second thermal management component; 501-the second flow channel; 501A-the third sub-flow channel; 501B-the fourth sub-flow channel; 501C-the second connecting cavity; 51-the second current collector; 511-the second medium inlet; 512-the second medium outlet; 513-the third cavity; 514-the fourth cavity; 515-the third flow guide channel; 516-the fourth flow guide channel; 52-the third connecting pipe; 53-the fourth connecting pipe; 54-the second medium input pipe; 55-the second medium output pipe; 200-the controller; 300-the motor; X-the first direction; Y-the second direction; Z-the third direction. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The term “plurality” used in this application refers to two or more (including two).

[0051] 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.

[0052] 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.

[0053] In the related art, a battery cell generally includes an outer shell and an electrode assembly. The outer shell may include a shell and an end cover. The shell has an opening. After the electrode assembly is loaded into the shell, the opening of the shell can be closed by the end cover to form an enclosed space inside the shell to accommodate the electrode assembly.

[0054] 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 released back and forth 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.

[0055] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0056] In some embodiments, the electrode assembly is a laminate structure.

[0057] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0058] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0059] The shell is used to encapsulate the electrode assembly and electrolyte and other components. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film.

[0060] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0067] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0068] 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.

[0069] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery reliability must also be considered.

[0070] During the charge and discharge process of the battery cell, the embedding and extraction of metal ions in the electrode active material will cause the expansion and contraction of the battery cell. Ideally, the volume change of the material during the embedding and extraction of metal ions should be reversible. However, in actual situations, some metal ions cannot be completely extracted from the anode due to changes in the balance of the battery cell, or are deposited on the anode surface as insoluble byproducts during the cycle. This will cause irreversible expansion of the battery cell. The electrolyte in the battery cell contains impurities or the electrolyte has a low electrochemical window, which may cause the electrolyte to decompose and produce gas, causing the battery cell to expand. The manufacturing process of the battery cell may also cause the expansion of the battery cell. For example, poor packaging allows moisture to enter the battery cell, which may also cause the battery cell to expand. In a conventional battery device, a partition beam is set in the box body to divide the accommodating cavity in the box body into two sub-accommodating cavities arranged along the first direction, and a battery cell assembly is placed in the two sub-accommodating cavities. At the same time, the surface with the largest area of ​​the battery cell assembly is perpendicular to the second direction, and the second direction is perpendicular to the first direction, so as to limit the expansion of the battery cell through two walls of the box body arranged oppositely in the second direction. Since the working environments of the two battery cell assemblies are independent of each other, the expansion conditions of the two battery cell assemblies are different. Different battery cell assemblies will expand displacedly in the second direction, that is, the expansion amounts of the ends of different battery cell assemblies close to each other in the second direction are different. As a result, the two walls of the box body that are relatively arranged in the second direction are subjected to different expansion forces of the battery cells of the battery cell assembly in the areas that abut against different battery cell assemblies, which in turn causes the wall of the box body to be subjected to uneven force, resulting in the two walls of the box body that are relatively arranged in the second direction being prone to asymmetric deformation, thereby affecting the stability of the working environment of the battery cell assembly, and further affecting the reliability of the battery device.

[0071] Based on the above considerations, in order to improve the reliability of the battery device, an embodiment of the present application provides a battery device, including a first battery cell assembly, a second battery cell assembly and a box body, a first thermal management component, a first current collector, a first connecting pipe, a second connecting pipe, a first medium input pipe and a third medium output pipe; the first battery cell assembly includes a plurality of first battery cells; the second battery cell assembly includes a plurality of second battery cells; the box body includes a box body body and a partition beam, the box body has a accommodating cavity, the partition beam is arranged in the accommodating cavity, and divides the accommodating cavity into a first sub-accommodating cavity and a second sub-accommodating cavity arranged along a first direction, the first battery cell assembly is arranged in the first sub-accommodating cavity, the second battery cell assembly is arranged in the second sub-accommodating cavity, and a third flow channel for accommodating a heat exchange medium is formed inside the partition beam; a plurality of first thermal management components are arranged in the first sub-accommodating cavity at intervals along the first direction, At least one first battery cell is arranged between two adjacent first thermal management components, a first flow channel for accommodating a heat exchange medium is formed inside the first thermal management component, and the first flow channel is connected to a third flow channel; a first current collector is arranged at one end of the first thermal management component in the second direction, the first current collector has a first medium inlet and a first medium outlet, and the first direction is perpendicular to the second direction; a first connecting pipe is arranged in the first sub-accommodating cavity, for connecting the first medium inlet of two adjacent first current collectors; a second connecting pipe is arranged in the first sub-accommodating cavity, for connecting the first medium outlet of two adjacent first current collectors; one end of the first medium input pipe is connected to the one of the multiple first thermal management components that is farthest from the partition beam; one end of the third medium output pipe is connected to the partition beam; wherein the surface with the largest area of ​​the first battery cell and the surface with the largest area of ​​the second battery cell are both perpendicular to the first direction.

[0072] In the battery device of this structure, the surface with the largest area of ​​the first battery cell and the surface with the largest area of ​​the second battery cell are set to be perpendicular to the first direction, so that the main expansion direction of the first battery cell and the main expansion direction of the second battery cell are set in line and parallel to the first direction. Therefore, compared with the situation that the surface with the largest area of ​​the first battery cell and the surface with the largest area of ​​the second battery cell are set to be perpendicular to the second direction, so that the main expansion direction of the first battery cell is parallel to the main expansion direction of the second battery cell and parallel to the second direction, on the one hand, the two opposite sides of the partition beam in the first direction bear the expansion force of the first battery cell and the expansion force of the second battery cell respectively, so that while limiting the expansion of the first battery cell and the second battery cell, the partition beam is subjected to more uniform force, reducing the risk of deformation of the partition beam, thereby improving the reliability of the battery device; on the other hand, the risk of uneven force and local deformation caused by different parts of the wall of the box body in the second direction abutting against the first battery cell and the second battery cell respectively is reduced, so that the box can provide a more stable working environment for the first battery cell assembly and the second battery cell assembly, thereby improving the reliability of the battery device. By setting a third flow channel for accommodating a heat exchange medium in the partition beam, the partition beam can adjust the temperature of the first battery cell adjacent to it, thereby reducing the first thermal management component, and further reducing the space occupied by multiple first thermal management components and the partition beam in the accommodating cavity, which is conducive to improving the volume energy density of the battery device. Multiple first thermal management components are arranged in the first sub-accommodating cavity at intervals along the first direction, and at least one first battery cell is arranged between two adjacent first thermal management components to adjust the temperature of the first battery cell, reducing the risk of thermal runaway of the first battery cell assembly and improving the reliability of the battery device. The heat exchange medium flows into the multiple first thermal management components through the first medium input pipe and flows out of the third flow channel through the third medium output pipe; thereby, the flow length of the heat exchange medium flowing through any first thermal management component is the same, so that the heat exchange medium flowing through any first thermal management component is subjected to the same flow resistance, and further, the flow rate of the heat exchange medium in any first thermal management component is the same, so that the first thermal management component can more evenly adjust the heat of the first battery cell in the first battery cell assembly, reduce the risk of uneven heat distribution in the first battery cell assembly, and improve the reliability of the first battery cell assembly.

[0073] 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.

[0074] For example, Figure 1The 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.

[0075] In order to meet different power requirements, the battery device 100 may include a plurality of battery cells, wherein the plurality of battery cells 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 may first be connected in series, in parallel, or in a hybrid connection to form a battery cell assembly, and a plurality of battery cell assemblies may then be connected in series, in parallel, or in a hybrid connection to form the battery device 100. In other words, a plurality of battery cells may directly form the battery device 100, or may first form a battery cell assembly, and the battery cell assembly may then form the battery device 100.

[0076] Please refer to Figure 2 , Figure 2The structural exploded diagram of a battery device 100 provided for some embodiments of the present application. The embodiment of the present application provides a battery device 100, including a first battery cell assembly 20, a second battery cell assembly 30 and a box 10, a first thermal management component 40, a first connecting pipe 42, a second connecting pipe 43, a first medium input pipe 44 and a third medium output pipe 13; the first battery cell assembly 20 includes a plurality of first battery cells 21; the second battery cell assembly 30 includes a plurality of second battery cells 31; the box 10 includes a box body 11 and a partition beam 12, the box body 11 has a receiving cavity 110, the partition beam 12 is arranged in the receiving cavity 110, and the receiving cavity 110 is divided into a first sub-receiving cavity 110A and a second sub-receiving cavity 110B arranged along a first direction X, the first battery cell assembly 20 is arranged in the first sub-receiving cavity 110A, the second battery cell assembly 30 is arranged in the second sub-receiving cavity 110B, and a third flow channel for accommodating a heat exchange medium is formed inside the partition beam 12; the plurality of first thermal management components 40 are spaced along the first direction X It is arranged in the first sub-accommodating chamber 110A, at least one first battery cell 21 is arranged between two adjacent first thermal management components 40, a first flow channel 401 for accommodating a heat exchange medium is formed inside the first thermal management component 40, and the third flow channel is connected to the first flow channel 401; the first current collector 41 is arranged at one end of the first thermal management component 40 in the second direction Y, the first current collector 41 has a first medium inlet 411 and a first medium outlet 412, and the first direction X is perpendicular to the second direction Y; the first connecting pipe 42 is arranged in the first sub-accommodating chamber 110A, for connecting the first medium inlet 411 of two adjacent first current collectors 41; the second connecting pipe 43 is arranged in the first sub-accommodating chamber 110A, for connecting the first medium outlet 412 of two adjacent first current collectors 41; one end of the first medium input pipe 44 is connected to the one of the multiple first thermal management components 40 that is farthest from the partition beam 12; one end of the third medium output pipe 13 is connected to the partition beam 12.

[0077] The surface of the first battery cell 21 with the largest area and the surface of the second battery cell 31 with the largest area are both perpendicular to the first direction X.

[0078] There may be multiple battery cells in a battery cell assembly, and the multiple battery cells may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells are both connected in series and in parallel. The multiple battery cells may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells may be accommodated in the box 10; of course, the battery cell assembly may also be a battery module formed by connecting multiple battery cells in series, in parallel, or in a mixed connection, and then the multiple battery modules may be connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery cell assembly may also include other structures, for example, the battery cell assembly may also include a busbar component for realizing electrical connection between multiple battery cells.

[0079] Among them, the battery cell can be a secondary battery or a primary battery; the battery cell can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.

[0080] In some embodiments, the first battery cell assembly 20 may include one or more first battery cells 21. Alternatively, the first battery cell assembly 20 may also include one or more battery modules composed of the first battery cells 21.

[0081] In some embodiments, the second battery cell assembly 30 may include one or more second battery cells 31 . Alternatively, the second battery cell assembly 30 may also include one or more battery modules composed of the second battery cells 31 .

[0082] The box body 10 is a shell for providing installation space for the first battery cell assembly 20 , the second battery cell assembly 30 and other structural components of the battery device 100 .

[0083] The box body 11 is a component in the box 10 for carrying and accommodating the first battery cell assembly 20 and the second battery cell assembly 30 .

[0084] In some embodiments, the box body 11 includes a first box body 11A and a second box body 11B, and the first box body 11A and the second box body 11B are buckled together. The shapes of the first box body 11A and the second box body 11B can be determined according to the shapes of the combination of multiple battery cells, and the first box body 11A and the second box body 11B can each have an open surface. For example, the first box body 11A and the second box body 11B can both be hollow cuboids and each has only one open surface, the open surface of the first box body 11A and the open surface of the second box body 11B are arranged opposite to each other, and the first box body 11A and the second box body 11B are buckled together to form the box body 11 with a closed chamber.

[0085] The partition beam 12 is disposed in the accommodation chamber 110 to divide the accommodation chamber 110 into a first sub-accommodation chamber 110A and a second sub-accommodation chamber 110B arranged along a first direction X. The first direction X may be parallel to a width direction of the box body 10 .

[0086] In some embodiments, the partition beam 12 extends along the second direction Y, and both ends of the partition beam 12 in the second direction Y are connected to the box body 11, so as to divide the accommodating cavity 110 into a first sub-accommodating cavity 110A and a second sub-accommodating cavity 110B arranged along the first direction X, and the second direction Y is perpendicular to the first direction X.

[0087] Exemplarily, the partition beam 12 may be made of the same material as the box body 11 , or the partition beam 12 may be made of a different material than the box body 11 .

[0088] The partition beam 12 and the first battery cell assembly 20 may be in contact with each other in the first direction X, or a gap may exist between the partition beam 12 and the first battery cell assembly 20 in the first direction X; the partition beam 12 and the second battery cell assembly 30 may be in contact with each other in the first direction X, or a gap may exist between the partition beam 12 and the second battery cell assembly 30 in the first direction X.

[0089] In some embodiments, the battery cell may be a square shell battery cell, and the shape of the battery cell is: two relative surface areas are larger than the other four relative surface areas, or four relative surface areas are equal and larger than the other two relative surface areas, or six relative surface areas are equal.

[0090] The surface with the largest area of ​​the first battery cell 21 means that the area of ​​this surface of the first battery cell 21 is not less than the area of ​​other surfaces of the first battery cell 21; the surface with the largest area of ​​the second battery cell 31 means that the area of ​​this surface of the second battery cell 31 is not less than the area of ​​other surfaces of the second battery cell 31.

[0091] The battery cell includes a shell and an electrode assembly contained in the shell, which includes a positive electrode sheet and a negative electrode sheet. The electrode assembly has a flat area, and the part of the positive electrode sheet located in the flat area and the part of the negative electrode sheet located in the flat area are generally arranged parallel to the surface with the largest area of ​​the battery cell. During the charging and discharging process of the battery cell, the embedding and extraction of metal ions in the electrode active material will cause the expansion and contraction of the battery cell. Ideally, the volume change of the material during the embedding and extraction of metal ions should be reversible. However, in actual situations, there are some metal ions that cannot be completely extracted from the anode due to changes in the balance of the battery cell, or are deposited on the anode surface as insoluble byproducts during the cycle. This will cause irreversible expansion of the battery cell. Impurities in the electrolyte in the battery cell or low electrochemical window of the electrolyte may cause the electrolyte to decompose and produce gas, causing the battery cell to expand. The manufacturing process of the battery cell may also cause the expansion of the battery cell. For example, poor packaging allows moisture to enter the battery cell, which may also cause the battery cell to expand. In summary, the expansion of the battery cell will mainly be reflected on the surface with the largest area of ​​the battery cell. The largest surface of the first battery cell 21 and the largest surface of the second battery cell 31 are both perpendicular to the first direction X, so that the first battery cell 21 and the second battery cell 31 mainly expand along the first direction X.

[0092] Therefore, when the first battery cell 21 and the second battery cell 31 expand to abut against the partition beam 12, the partition beam 12 can limit the expansion of the first battery cell 21 and the second battery cell 31. At the same time, since the first battery cell assembly 20 and the second battery cell assembly 30 are respectively located in the first sub-accommodation cavity 110A and the second sub-accommodation cavity 110B arranged along the first direction X, the first battery cell assembly 20 and the second battery cell assembly 30 are arranged along the first direction X, so that the first battery cell 21 and the second battery cell 31 expand in a collinear direction. Therefore, the partition beam 12 is subjected to a more uniform force, reducing the risk of deformation of the partition beam 12.

[0093] In some embodiments, two side surfaces of the partition beam 12 that are oppositely arranged in the first direction X are respectively in contact with the first battery cell 21 closest to the partition beam 12 in the first battery cell assembly 20 and the second battery cell 31 closest to the partition beam 12 in the second battery cell assembly 30, so as to limit the expansion of the first battery cell 21 and the second battery cell 31 while regulating the temperature of the first battery cell 21 and the second battery cell 31. Thus, the number of the first thermal management component 40 and the second thermal management component 50 is reduced.

[0094] It can be understood that by providing a third flow channel for accommodating a heat exchange medium in the partition beam 12, the partition beam 12 can regulate the temperature of the first battery cell 21 and the second battery cell 31 adjacent to it, thereby reducing the number of first thermal management components 40 and second thermal management components 50, and further reducing the space occupied by multiple first thermal management components 40, multiple second thermal management components 50 and the partition beam 12 in the accommodating cavity 110, which is beneficial to improving the volume energy density of the battery device 100.

[0095] The first heat management component 40 is a component for adjusting the temperature of the first battery cell 21 in the first battery cell assembly 20 .

[0096] Adjusting the temperature means heating or cooling the battery cell. For example, when the battery cell is cooled or lowered in temperature, the first thermal management component 40 is used to contain a cooling fluid or a solid-liquid phase change material to lower the temperature of the battery cell. At this time, the first thermal management component 40 may also be referred to as a cooling component, a cooling system, or a cooling plate, etc., and the fluid contained therein may also be referred to as a cooling medium or a cooling fluid, more specifically, a coolant or a cooling gas. In addition, the first thermal management component 40 may also be used for heating to raise the temperature of the battery cell, which is not limited in the embodiments of the present application.

[0097] In some embodiments, a plurality of first battery cells 21 are disposed between two adjacent first thermal management components 40 , and the plurality of first battery cells 21 are arranged along the first direction X.

[0098] In some embodiments, a plurality of first battery cells 21 are disposed between two adjacent first thermal management components 40 , and the plurality of first battery cells 21 are arranged along the second direction Y.

[0099] The first flow channel 401 is a channel in the first thermal management component 40 that can exchange heat medium and allow the heat exchange medium to flow.

[0100] The heat exchange medium can be liquid or gas. It can also be a solid-liquid phase change material, which is originally solid and can turn into liquid after absorbing heat.

[0101] For example, the heat exchange medium may be water, a mixture of water and ethylene glycol, or air.

[0102] The first heat management component 40 may directly abut against the first battery cell 21 along the first direction X, or may indirectly abut against the first battery cell 21 along the first direction X through a heat conductive member.

[0103] It can be understood that the first thermal management component 40 is in direct or indirect contact with the surface with the largest area of ​​the first battery cell 21, which can increase the heat exchange area between the first thermal management component 40 and the first battery cell 21. This is beneficial to controlling the thermal runaway of the first battery cell 21. A plurality of first thermal management components 40 are arranged in the first sub-accommodation cavity 110A at intervals along the first direction X, and at least one first battery cell 21 is arranged between two adjacent first thermal management components 40 to adjust the temperature of the first battery cell 21, thereby reducing the risk of thermal runaway of the first battery cell assembly 20 and improving the reliability of the battery device 100.

[0104] The current collector is a portion of the battery device 100 used for exchanging heat exchange medium between the outside and the thermal management component.

[0105] For example, the current collector may be made of metal material by machining, or the current collector may be made of plastic material by extrusion molding.

[0106] The first medium inlet 411 is a structure for allowing heat exchange medium to flow into the first fluid collector 41 , and the first medium outlet 412 is a structure for allowing heat exchange medium to flow out of the first fluid collector 41 .

[0107] In some embodiments, the first current collector 41 has a first cavity 413 and a second cavity 414 that are independent of each other, wherein the first cavity 413 is connected to the first medium inlet 411, and the second cavity 414 is connected to the first medium outlet 412. The first current collector 41 is provided with a first mounting hole on one end in the second direction Y that is connected to both the first cavity 413 and the second cavity 414. One end of the first thermal management component 40 is inserted into the first mounting hole so that the two ends of the first flow channel 401 are respectively connected to the first cavity 413 and the second cavity 414.

[0108] Optionally, the connection between the first thermal management component 40 and the first mounting hole can be sealed by welding; or, the connection between the first thermal management component 40 and the first mounting hole is sealed by adhesive; or, the first thermal management component 40 and the first mounting hole are sealed by interference fit.

[0109] The first current collector 41 is arranged at one end of the first thermal management component 40 in the second direction Y, and the first medium inlet 411 and the first medium outlet 412 are both arranged on the first current collector 41, so that it is convenient to arrange the pipeline connected to the first medium inlet 411 and the first medium outlet 412 at one end of the first thermal management component 40, thereby facilitating the arrangement of the supply pipeline of the heat exchange medium of the first thermal management component 40.

[0110] The first connecting pipe 42 is a pipe in the battery device 100 for connecting the first medium inlet 411 of the adjacent first current collector 41 ; the second connecting pipe 43 is a pipe in the battery device 100 for connecting the first medium outlet 412 of the adjacent first current collector 41 .

[0111] In some embodiments, the first current collector 41 is provided with a first joint connected to the first medium inlet 411 and a second joint connected to the first medium outlet 412, and the two ends of the first connecting tube 42 are respectively sleeved outside the first joints of two adjacent first current collectors 41 to connect the first medium inlets 411 of the two adjacent first current collectors 41; the two ends of the second connecting tube 43 are respectively sleeved outside the second joints of the two adjacent first current collectors 41 to connect the first medium outlets 412 of the two adjacent first current collectors 41.

[0112] It can be understood that the first connecting tube 42 is used to connect the first medium inlet 411 of two adjacent first current collectors 41, and the second connecting tube 43 is used to connect the first medium outlet 412 of two adjacent first current collectors 41, thereby realizing the connection of the first flow channels 401 of multiple first thermal management components 40, and the structure is simple and easy to implement.

[0113] The first medium input pipe 44 is a pipe for the heat exchange medium to flow into the first thermal management component 40. Exemplarily, the first medium input pipe 44 is connected to the first flow channel 401 in the first thermal management component 40; the third medium output pipe 13 is a pipe for the heat exchange medium to flow out of the partition beam 12. Exemplarily, the third medium output pipe 13 is connected to the third flow channel in the partition beam 12.

[0114] Specifically, taking the heat exchange medium flowing in from the first medium input pipe 44 as an example, after the heat exchange medium enters the first medium inlet 411 of one of the multiple first thermal management components 40 that is farthest from the partition beam 12 from the first medium input pipe 44, part of the heat exchange medium enters the first flow channel 401 of the thermal management component and flows out from the first medium outlet 412 to flow to the third medium outlet through the second connecting pipe 43 to flow out from the third medium output pipe 13; the remaining part can enter the first medium inlet 411 of the adjacent first thermal management part or the third medium inlet of the partition beam 12 along the first connecting pipe 42, and finally flow out from the third medium output pipe 13. Thereby, the flow length of the heat exchange medium flowing through any first thermal management component 40 is the same, and the flow resistance encountered by the heat exchange medium flowing through any first thermal management component 40 is the same, thereby making the flow rate of the heat exchange medium in any first thermal management component 40 the same, so that the first thermal management component 40 can more evenly regulate the heat of the first battery cell in the first battery cell assembly, reduce the risk of uneven heat distribution in the first battery cell assembly, and improve the reliability of the first battery cell assembly.

[0115] In this embodiment, the surface with the largest area of ​​the first battery cell 21 and the surface with the largest area of ​​the second battery cell 31 are set to be perpendicular to the first direction X, so that the main expansion direction of the first battery cell 21 and the main expansion direction of the second battery cell 31 can be set in line and parallel to the first direction X. Therefore, compared with the situation that the surface with the largest area of ​​the first battery cell 21 and the surface with the largest area of ​​the second battery cell 31 are set to be perpendicular to the second direction Y, so that the main expansion direction of the first battery cell 21 is parallel to the main expansion direction of the second battery cell 31 and parallel to the second direction Y, on the one hand, the partition beam 12 bears the expansion force of the first battery cell 21 and the expansion force of the second battery cell 31 on the opposite sides in the first direction X, respectively, so that while limiting the expansion of the first battery cell 21 and the second battery cell 31, the partition beam 12 is subjected to more uniform force, reducing the risk of deformation of the partition beam 12, so that the expansion of the battery cell can be better limited, thereby further improving the internal cycle performance of the battery cell, extending the service life of the battery cell, and improving the stability of the overall structure of the battery, thereby improving the reliability of the battery device 100; on the other hand, the risk of uneven force and local deformation caused by different parts of the wall of the box body 11 in the second direction Y abutting against the first battery cell 21 and the second battery cell 31 is reduced, so that the box body 10 can provide the first battery cell assembly 20 and the second battery cell assembly 30 with a more stable working environment, thereby improving the reliability of the battery device 100. By providing a third flow channel for accommodating a heat exchange medium in the partition beam 12, the partition beam 12 can regulate the temperature of the first battery cell 21 adjacent thereto, thereby reducing the first thermal management component 40, and further reducing the space in the accommodating cavity 110 jointly occupied by multiple first thermal management components 40 and the partition beam 12, which is beneficial to improving the volume energy density of the battery device 100. Multiple first thermal management components 40 are arranged in the first sub-accommodating cavity 110A at intervals along the first direction X, and at least one first battery cell 21 is arranged between two adjacent first thermal management components 40 to regulate the temperature of the first battery cell 21, thereby reducing the risk of thermal runaway of the first battery cell assembly 20 and improving the reliability of the battery device 100. The heat exchange medium flows into multiple first thermal management components 40 through the first medium input pipe 44, and flows out of the third flow channel through the third medium output pipe 13; thereby, the flow length of the heat exchange medium flowing through any first thermal management component 40 is the same, so that the heat exchange medium flowing through any first thermal management component 40 is subject to the same flow resistance, and further the flow rate of the heat exchange medium in any first thermal management component 40 is the same, so that the first thermal management component 40 can more evenly adjust the heat of the first battery cell 21 in the first battery cell assembly 20, reduce the risk of uneven heat distribution in the first battery cell assembly 20, and improve the reliability of the first battery cell assembly 20.

[0116] According to some embodiments of this application, please refer to Figure 2 , and please refer to Figure 3 and Figure 4 , Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 The battery device 100 further includes a plurality of second thermal management components 50, which are arranged in the second sub-accommodation cavity 110B at intervals along the first direction X, at least one second battery cell 31 is arranged between two adjacent second thermal management components 50, and a second flow channel 501 for accommodating a heat exchange medium is formed inside the second thermal management component 50.

[0117] The second heat management component 50 is a component for adjusting the temperature of the second battery cells 31 in the second battery cell assembly 30 .

[0118] In some embodiments, a plurality of second battery cells 31 are disposed between two adjacent second thermal management components 50 , and the plurality of second battery cells 31 are arranged along the first direction X.

[0119] In some embodiments, a plurality of second battery cells 31 are disposed between two adjacent second thermal management components 50 , and the plurality of second battery cells 31 are arranged along the second direction Y.

[0120] The second flow channel 501 is a channel in the second thermal management component 50 that can exchange heat medium and allow the heat exchange medium to flow.

[0121] The second heat management component 50 may directly abut against the second battery cell 31 along the first direction X, or may indirectly abut against the second battery cell 31 along the first direction X through a heat conductive member.

[0122] It can be understood that direct or indirect contact between the second thermal management component 50 and the largest surface of the second battery cell 31 can increase the heat exchange area between the second thermal management component 50 and the second battery cell 31 , which is beneficial to controlling thermal runaway of the second battery cell 31 .

[0123] In this embodiment, a plurality of second thermal management components 50 are arranged in the second sub-containing cavity 110B at intervals along the first direction X, and at least one second battery cell 31 is arranged between two adjacent second thermal management components 50 to regulate the temperature of the second battery cell 31, thereby reducing the risk of thermal runaway of the second battery cell assembly 30 and improving the reliability of the battery device 100.

[0124] According to some embodiments of this application, please refer to Figure 3 , and please refer to Figure 4 and Figure 5 , Figure 5A cross-sectional view of a first current collector 41 and a first thermal management component 40 provided in an embodiment of the present application, Figure 6 The battery device 100 further includes a second current collector 51 ; the second current collector 51 is disposed at one end of the second thermal management component 50 in the second direction Y, and the second current collector 51 has a second medium inlet 511 and a second medium outlet 512 .

[0125] The second medium inlet 511 is a structure for allowing heat exchange medium to flow into the second fluid collector 51 , and the second medium outlet 512 is a structure for allowing heat exchange medium to flow out of the second fluid collector 51 .

[0126] In some embodiments, the second current collector 51 has a third cavity 513 and a fourth cavity 514 that are independent of each other, wherein the third cavity 513 is connected to the second medium inlet 511, and the fourth cavity 514 is connected to the second medium outlet 512. The second current collector 51 is provided with a second mounting hole connected to both the third cavity 513 and the fourth cavity 514 at one end in the second direction Y, and one end of the second thermal management component 50 is inserted into the second mounting hole so that the two ends of the second flow channel 501 are respectively connected to the third cavity 513 and the fourth cavity 514.

[0127] Optionally, the connection between the second thermal management component 50 and the second mounting hole can be sealed by welding; or, the connection between the second thermal management component 50 and the second mounting hole is sealed by adhesive; or, the second thermal management component 50 and the second mounting hole are sealed by interference fit.

[0128] In this embodiment, the second current collector 51 is arranged at one end of the second thermal management component 50 in the second direction Y, and the second medium inlet 511 and the second medium outlet 512 are both arranged on the second current collector 51, so as to facilitate the arrangement of the pipeline connected to the second medium inlet 511 and the second medium outlet 512 at one end of the second thermal management component 50, thereby facilitating the arrangement of the supply pipeline of the heat exchange medium of the second thermal management component 50.

[0129] According to some embodiments of this application, please refer to Figure 2 , and please refer to Figure 3 and Figure 4 , on a plane perpendicular to the first direction X, the orthographic projection of the first current collector 41 and the orthographic projection of the second current collector 51 at least partially overlap.

[0130] “On a plane perpendicular to the first direction X, the orthographic projection of the first current collector 41 and the orthographic projection of the second current collector 51 at least partially overlap” may mean that on a plane perpendicular to the first direction X, the orthographic projection of the first current collector 41 and the orthographic projection of the second current collector 51 partially overlap, or that on a plane perpendicular to the first direction X, the orthographic projection of the first current collector 41 and the orthographic projection of the second current collector 51 completely overlap.

[0131] In some embodiments, the battery device 100 also includes a connector for electrically connecting the first battery cell assembly 20 and the second battery cell assembly 30 and other structural parts of the electrical device. The connector and the first current collector 41 are respectively located at the opposite ends of the first battery cell assembly 20 in the second direction Y, and the connector and the second current collector 51 are respectively located at the opposite ends of the second battery cell assembly 30 in the second direction Y, thereby enabling water cooling connection on one side of the battery cell assembly and high-voltage electrical connection on the other side, realizing a liquid-electric separation design and improving the reliability of the battery device 100.

[0132] In this embodiment, on a plane perpendicular to the first direction X, the orthographic projection of the first current collector 41 and the orthographic projection of the second current collector 51 at least partially overlap, so that the first current collector 41 and the second current collector 51 are close to the same end of the box body 11 in the second direction Y, so as to facilitate setting the heat exchange medium inflow pipe and the heat exchange medium outflow pipe of the battery device 100 on the same side of the box body 11, which is beneficial to realize the setting of the heat exchange medium and electrical connections on different sides of the battery device 100, thereby facilitating the improvement of the reliability of the battery device 100.

[0133] According to some embodiments of this application, please refer to Figure 2 , and please refer to Figure 3 and Figure 4 The battery device 100 also includes a third connecting tube 52 and a fourth connecting tube 53; the third connecting tube 52 is arranged in the second sub-accommodating chamber 110B, and is used to connect the second medium inlet 511 of two adjacent second current collectors 51; the fourth connecting tube 53 is arranged in the second sub-accommodating chamber 110B, and is used to connect the second medium outlet 512 of two adjacent second current collectors 51.

[0134] In some embodiments, the second current collector 51 is provided with a third joint connected to the second medium inlet 511 and a fourth joint connected to the second medium outlet 512, and the two ends of the third connecting tube 52 are respectively sleeved outside the third joints of two adjacent second current collectors 51 to connect the second medium inlets 511 of two adjacent second current collectors 51; the two ends of the fourth connecting tube 53 are respectively sleeved outside the fourth joints of two adjacent second current collectors 51 to connect the second medium outlets 512 of two adjacent second current collectors 51.

[0135] In this embodiment, the third connecting tube 52 is used to connect the second medium inlet 511 of two adjacent second current collectors 51, and the fourth connecting tube 53 is used to connect the second medium outlet 512 of two adjacent second current collectors 51, thereby realizing the connection of the second flow channels 501 of multiple second thermal management components 50, and the structure is simple and easy to implement.

[0136] According to some embodiments of this application, please refer to Figure 2 , and please refer to Figure 3 and Figure 4 The first connecting tube 42 and the second connecting tube 43 are arranged along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; the third connecting tube 52 and the fourth connecting tube 53 are arranged along the third direction Z.

[0137] The third direction Z may be parallel to the thickness direction of the box body 11 .

[0138] In some embodiments, on a plane perpendicular to the third direction Z, the orthographic projection of the first connecting tube 42 and the orthographic projection of the second connecting tube 43 completely overlap.

[0139] In this embodiment, the first connecting tube 42 and the second connecting tube 43 are arranged along the third direction Z, thereby fully utilizing the space of the first sub-containing cavity 110A in the third direction Z, improving the utilization rate of the space inside the box body 10, and being beneficial to improving the volume energy density of the battery device 100; the third connecting tube 52 and the fourth connecting tube 53 are arranged along the third direction Z, thereby fully utilizing the space of the second sub-containing cavity 110B in the third direction Z, improving the utilization rate of the space inside the box body 10, and being beneficial to improving the volume energy density of the battery device 100.

[0140] According to some embodiments of this application, please refer to Figure 2 , and please refer to Figure 3 and Figure 4 The size of the first sub-accommodating cavity 110A along the first direction X is smaller than the size of the first sub-accommodating cavity 110A along the second direction Y, and the size of the second sub-accommodating cavity 110B along the first direction X is smaller than the size of the second sub-accommodating cavity 110B along the second direction Y.

[0141] The size of the first sub-accommodating chamber 110A along the first direction X refers to the distance between the two wall portions of the first sub-accommodating chamber 110A which are oppositely arranged in the first direction X; the size of the first sub-accommodating chamber 110A along the second direction Y refers to the distance between the two wall portions of the first sub-accommodating chamber 110A which are oppositely arranged in the second direction Y; the size of the second sub-accommodating chamber 110B along the first direction X refers to the distance between the two wall portions of the second sub-accommodating chamber 110B which are oppositely arranged in the first direction X; the size of the second sub-accommodating chamber 110B along the second direction Y refers to the distance between the two wall portions of the second sub-accommodating chamber 110B which are oppositely arranged in the second direction Y.

[0142] In this embodiment, the size of the first sub-accommodating chamber 110A along the first direction X is smaller than the size of the first sub-accommodating chamber 110A along the second direction Y, and the first connecting tube 42 and the second connecting tube 43 connect the first thermal management components 40 adjacent to each other along the first direction X. Therefore, compared with the case where a plurality of first thermal management components 40 are arranged along the second direction Y and the first connecting tube 42 and the second connecting tube 43 connect the first thermal management components 40 adjacent to each other along the second direction Y, the length of the first connecting tube 42 and the second connecting tube 43 is reduced, thereby reducing the volume of the first connecting tube 42 and the second connecting tube 43, so that more space of the first sub-accommodating chamber 110A can be used to accommodate the first battery cell 21, thereby facilitating the improvement of the volume energy density of the battery device 100; the size of the second sub-accommodating chamber 110B along the first direction X is smaller than the size of the first sub-accommodating chamber 110A along the second direction Y, and the third connecting tube 52 and the fourth connecting tube 53 connect the second thermal management components 50 adjacent to each other along the first direction X. Therefore, relative to the situation where multiple second thermal management components 50 are arranged along the second direction Y, and the third connecting tube 52 and the fourth connecting tube 53 connect the second thermal management components 50 adjacent to each other along the second direction Y, the length of the third connecting tube 52 and the fourth connecting tube 53 are reduced, thereby reducing the volume of the third connecting tube 52 and the fourth connecting tube 53, so that more space in the second sub-containing cavity 110B can be used to accommodate the second battery cell 31, which is beneficial to improving the volume energy density of the battery device 100.

[0143] According to some embodiments of this application, please refer to Figure 5 and Figure 6 The first flow channel 401 includes a first sub-channel 401A and a second sub-channel 401B. The first sub-channel 401A and the second sub-channel 401B both extend along the second direction Y. One end of the first sub-channel 401A is connected to the first medium inlet 411, one end of the second sub-channel 401B is connected to the first medium outlet 412, and the other end of the first sub-channel 401A is connected to the other end of the second sub-channel 401B.

[0144] The first sub-channel 401A is a portion of the first channel 401 for connecting to the first medium inlet 411 ; the second sub-channel 401B is a portion of the first channel 401 for connecting to the first medium outlet 412 .

[0145] In some embodiments, one end of the first sub-channel 401A is in communication with the first medium inlet 411, one end of the second sub-channel 401B is in communication with the first medium outlet 412, and the first channel 401 further includes a connecting sub-channel, which is located at one end of the first thermal management component 40 away from the first current collector 41 and extends along the third direction Z. One end of the connecting sub-channel is in communication with the other end of the first sub-channel 401A, and the other end of the connecting sub-channel is in communication with the other end of the second sub-channel 401B.

[0146] In some embodiments, please refer to Figure 5 , the third direction Z is parallel to the direction of gravity, the first medium inlet 411 is located above the first medium outlet 412, and the first sub-channel 401A is located above the second sub-channel 401B, so that the gravitational potential energy is utilized to make it easier for the heat exchange medium to move from the first sub-channel 401A to the second sub-channel 401B, so as to increase the flow rate of the heat exchange medium in the first channel 401 and improve the heat exchange efficiency between the first thermal management component 40 and the first battery cell 21.

[0147] In some embodiments, please refer to Figure 6 The second flow channel 501 includes a third sub-channel 501A and a fourth sub-channel 501B, and the third sub-channel 501A and the fourth sub-channel 501B both extend along the second direction Y. One end of the third sub-channel 501A is connected to the second medium inlet 511, one end of the fourth sub-channel 501B is connected to the second medium outlet 512, and the other end of the first sub-channel 401A is connected to the other end of the second sub-channel 401B.

[0148] In this embodiment, the first flow channel 401 is configured to include a first sub-flow channel 401A and a second sub-flow channel 401B, and one end of the first sub-flow channel 401A is connected to the first medium inlet 411, one end of the second sub-flow channel 401B is connected to the first medium outlet 412, and the other end of the first sub-flow channel 401A is connected to the other end of the second sub-flow channel 401B, so that the heat exchange medium can flow out from the first medium outlet 412 on the same side as the first medium inlet 411 after flowing into the first flow channel 401 through the first medium inlet 411. The structure is simple and easy to implement.

[0149] According to some embodiments of this application, please refer to Figure 5 and Figure 6The first sub-channels 401A are multiple and arranged along the third direction Z. A first cavity 413 and a first guide channel 415 are provided in the first current collector 41. The first cavity 413 is connected to the multiple first sub-channels 401A. The first guide channel 415 is used to connect the first medium inlet 411 and the first cavity 413. The first direction X, the second direction Y and the third direction Z are perpendicular to each other; wherein, the extension direction of the first guide channel 415 forms an angle with the second direction Y.

[0150] In some embodiments, the length direction of the first cavity 413 is parallel to the third direction Z.

[0151] In some embodiments, the first flow channel 401 also includes a first connecting cavity 401C, which is arranged at an end of the first thermal management component 40 away from the first current collector 41, and is connected to ends of multiple first sub-flow channels 401A away from the first current collector 41, and the first connecting cavity 401C is connected to the second sub-flow channel 401B.

[0152] The first flow guide channel 415 is a channel for guiding the heat exchange medium to enter the first cavity 413 in a specific direction. The specific direction is parallel to the extension direction of the first flow guide channel 415.

[0153] The extension direction of the first flow channel 415 forms an angle with the second direction Y, that is, the extension direction of the first flow channel 415 forms an angle with the extension direction of the first sub-flow channel 401A, that is, the flow direction of the heat exchange medium entering the first cavity 413 from the first flow channel 415 is not parallel to the extension direction of the first sub-flow channel 401A. This facilitates the formation of turbulence in the first cavity 413, thereby allowing the heat exchange medium to be more evenly distributed in the first cavity 413, and to enter the plurality of first sub-flow channels 401A more evenly through the first cavity 413.

[0154] In some embodiments, reference Figure 5 The first sub-channel 401A and the second sub-channel 401B are connected through the first connecting cavity 401C. The second sub-channel 401B is arranged in a plurality along the third direction Z. The second cavity 414 and the plurality of second sub-channels 401B are connected. The second cavity 414 and the first medium outlet 412 are connected through the second guide channel 416.

[0155] In some embodiments, reference Figure 6The second flow channel 501 includes a third sub-flow channel 501A, a fourth sub-flow channel 501B and a second connecting cavity 501C. The third sub-flow channel 501A and the fourth sub-flow channel 501B both extend along the second direction Y. The third sub-flow channel 501A is a plurality of channels arranged along the third direction Z. The fourth sub-flow channel 501B is a plurality of channels arranged along the third direction Z. The third sub-flow channel 501A and the fourth sub-flow channel 501B are connected through the second connecting cavity 501C. The second current collector 51 is provided with a third cavity 513, a fourth cavity 514 and a third flow guide 515. The third cavity 513 is connected to the plurality of third sub-flow channels 501A. The third flow guide 515 is used to connect the second medium inlet 511 and the third cavity 513. The extending direction of the third flow guide 515 forms an angle with the second direction Y. The fourth cavity 514 and the plurality of fourth sub-channels 501B are all in communication. The fourth cavity 514 and the second medium outlet 512 are in communication through a fourth guide channel 516 .

[0156] In this embodiment, the extension direction of the first guide channel 415 forms an angle with the second direction Y, that is, the extension direction of the first guide channel 415 forms an angle with the extension direction of the first sub-channel 401A. Therefore, relative to the situation where the extension direction of the first guide channel 415 is parallel to the second direction Y, the risk of the heat exchange medium entering the first cavity 413 from the first guide channel 415 directly flowing into the first sub-channel 401A which is colinear or adjacent to the first guide channel 415, resulting in too little heat exchange medium in the first channel 401 away from the first guide channel 415, is reduced, thereby improving the reliability of the battery device 100.

[0157] According to some embodiments of the present application, the second flow channel 501 and the third flow channel are interconnected.

[0158] In some embodiments, the two side surfaces of the partition beam 12 in the first direction X are provided with a third medium inlet and a third medium outlet connected to the third flow channel, the first connecting pipe 42 is also used to connect the first medium inlet 411 and the third medium inlet of the one of the multiple first thermal management components 40 closest to the partition beam 12, the second connecting pipe 43 is also used to connect the first medium outlet 412 and the third medium outlet of the one of the multiple first thermal management components 40 closest to the partition beam 12, the third connecting pipe 52 is also used to connect the second medium inlet 511 and the third medium inlet of the one of the multiple second thermal management components 50 closest to the partition beam 12, and the fourth connecting pipe 53 is also used to connect the second medium outlet 512 and the third medium outlet of the one of the multiple second thermal management components 50 closest to the partition beam 12.

[0159] In this embodiment, the first flow channel 401, the second flow channel 501 and the third flow channel are interconnected, thereby facilitating the flow of the heat exchange medium between the first thermal management component 40, the second thermal management component 50 and the partition beam 12, and facilitating the setting of the medium input pipe and the medium output pipe.

[0160] According to some embodiments of this application, please refer to Figure 2 , and please refer to Figure 3 and Figure 4 The battery device 100 further includes a second medium input pipe 54 ; one end of the second medium input pipe 54 is connected to one of the plurality of second thermal management components 50 that is farthest from the partition beam 12 .

[0161] The second medium input pipe 54 is a pipe for the heat exchange medium to flow into the second thermal management component 50 . Exemplarily, the second medium input pipe 54 is in communication with the second flow channel 501 in the second thermal management component 50 .

[0162] In some embodiments, the first medium input pipe 44 is connected to the first medium inlet 411 of one of the multiple first thermal management components 40 that is farthest from the partition beam 12, the second medium input pipe 54 is connected to the second medium inlet 511 of one of the multiple second thermal management components 50 that is farthest from the partition beam 12, and the third medium output pipe 13 is connected to the third medium output port of the partition beam 12.

[0163] In this embodiment, one end of the first medium input pipe 44 is connected to the one of the multiple first thermal management components 40 that is farthest from the partition beam 12, one end of the second medium input pipe 54 is connected to the one of the multiple second thermal management components 50 that is farthest from the partition beam 12, and one end of the third medium output pipe 13 is connected to the partition beam 12, so that it is convenient to collect the heat exchange medium flowing out of the first thermal management component 40 and the medium flowing out of the second thermal management component 50 from the third medium output pipe 13 at the same time, and the structure is simple and easy to implement.

[0164] According to some embodiments of this application, please refer to Figure 2 The box body 11 includes a bottom plate 111 and a frame 112; the bottom plate 111 is used to carry the first battery cell assembly 20 and the second battery cell assembly 30; the frame 112 is arranged around the bottom plate 111, and the frame 112 and the bottom plate 111 are combined to form a accommodating cavity 110; wherein, the partition beam 12 extends along the second direction Y, and both ends of the partition beam 12 are connected to the frame 112, and the second direction Y is perpendicular to the first direction X.

[0165] The bottom plate 111 is a plate-shaped component for supporting the first battery cell assembly 20 and the second battery cell assembly 30 . Exemplarily, a structural member for limiting the movement of the first battery cell assembly 20 and the second battery cell assembly 30 may be provided on the bottom plate 111 .

[0166] The frame 112 is a structural member used to surround and form the side wall of the box body 11 .

[0167] In some embodiments, the partition beam 12 is connected to the bottom plate 111 so that there is no gap between the partition beam 12 and the bottom plate 111 in the third direction Z, and the opposite ends of the partition beam 12 in the second direction Y are connected to two wall portions of the frame 112 that are relatively arranged in the second direction Y, so that when a thermal management component in any sub-cavity 110 leaks, the partition beam 12 can limit the leaked heat exchange medium from entering the other sub-cavity 110, thereby increasing the risk of reducing short circuit in another battery cell assembly and improving the reliability of the battery device 100.

[0168] Exemplarily, the partition beam 12 is connected to the bottom plate 111 by gluing, foam support or the like.

[0169] In this embodiment, the partition beam 12 extends along the second direction Y, and both ends of the partition beam 12 are connected to the frame 112, so that when either of the two frame portions of the frame 112 that are relatively arranged in the second direction Y is subjected to external force, the component of force in the second direction Y can be transmitted to the other through the partition beam 12, thereby improving the structural strength of the frame 112; on the other hand, the frame 112 can provide supporting force to both ends of the partition beam 12 respectively, thereby reducing the vibration amplitude of the partition beam 12 when subjected to external force, thereby reducing the risk of a gap between the partition beam 12 and the bottom plate 111, thereby making the first sub-containing cavity 110A and the second sub-containing cavity 110B relatively isolated, thereby reducing the impact on the other when thermal runaway occurs in one of the first battery cell assembly 20 and the second battery cell assembly 30.

[0170] According to some embodiments of this application, please refer to Figure 2 The frame 112 forms an opening at one end away from the bottom plate 111 in the third direction Z, and the box body 11 also includes a cover 113; the cover 113 is connected to the frame 112 and closes the opening, and the partition beam 12 is respectively connected to the cover 113 and the bottom plate 111.

[0171] The cover 113 is a plate-shaped structure for closing the opening in the box body 11 .

[0172] Exemplarily, the cover 113 and the frame 112 may be made of the same material, or the cover 113 and the frame 112 may be made of a different material.

[0173] It can be understood that the partition beam 12 is connected to the cover body 113 and the bottom plate 111 respectively, so that there is no gap between the partition beam 12 and the bottom plate 111 in the third direction Z, and there is no gap between the partition beam 12 and the cover plate in the third direction Z. As a result, the first sub-accommodation chamber 110A and the second sub-accommodation chamber 110B are independent of each other, so that when thermal runaway occurs in any battery cell assembly, the pressure relief mechanism of the battery cell in the battery cell assembly is actuated, so that the high-temperature and high-pressure substances inside the battery cell are discharged from the actuated part as emissions. In this way, the battery cell can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents. The partition beam 12 can limit the transfer of emissions to another sub-accommodation chamber 110, thereby reducing the risk of thermal runaway of another battery cell caused by the increase in temperature in another sub-accommodation chamber 110. The reliability of the battery device 100 is thereby improved.

[0174] In this embodiment, the partition beam 12 is respectively connected to the cover body 113 and the bottom plate 111, so that when one of the first battery cell assembly 20 and the second battery cell assembly 30 experiences thermal runaway, the risk of hotter air entering the sub-containing cavity 110 where the other is located from the gap between the partition beam 12 and the cover body 113 and / or the gap between the partition beam 12 and the bottom plate 111, causing thermal runaway of the other, is reduced.

[0175] According to some embodiments of the present application, the first battery cell assembly 20 and the second battery cell assembly 30 are connected in series or in parallel.

[0176] In the present embodiment, when the first battery cell assembly 20 and the second battery cell assembly 30 are connected in series, the operating voltage of the battery device 100 is the sum of the operating voltages of the first battery cell assembly 20 and the second battery cell assembly 30, and the operating voltages of the first battery cell assembly 20 and the second battery cell assembly 30 can be reasonably distributed to reduce the severity of thermal runaway of one of the first battery cell assembly 20 and the second battery cell assembly 30, thereby improving the reliability of the battery device 100; when the first battery cell assembly 20 and the second battery cell assembly 30 are connected in parallel, the operating current of the battery device 100 is the sum of the operating currents of the first battery cell assembly 20 and the second battery cell assembly 30, so that when one of the first battery cell assembly 20 and the second battery cell assembly 30 undergoes thermal runaway, the other can continue to supply power to the electrical device, thereby improving the reliability of the battery device 100 during use.

[0177] Please refer to Figure 7 , Figure 7An exploded view of the structure of another battery device 100 provided for some embodiments of the present application. According to some embodiments of the present application, the embodiment of the present application provides a battery device 100, including a first battery cell assembly 20, a second battery cell assembly 30 and a box 10, a first thermal management component 40, a first current collector 41, a first connecting pipe 42, a second connecting pipe 43, a first medium input pipe 44 and a first medium output pipe 45; the first battery cell assembly 20 includes a plurality of first battery cells 21; the second battery cell assembly 30 includes a plurality of second battery cells 31; the box 10 includes a box body 10 and a partition beam 12, the box body 10 has a receiving cavity 110, the partition beam 12 is arranged in the receiving cavity 110, and the receiving cavity 110 is divided into a first sub-receiving cavity 110A and a second sub-receiving cavity 110B arranged along a first direction X, the first battery cell assembly 20 is arranged in the first sub-receiving cavity 110A, and the second battery cell assembly 30 is arranged in the second sub-receiving cavity 110B; a plurality of first thermal management components 40 are arranged in the first sub-receiving cavity 110 at intervals along the first direction X. A, at least one first battery cell 21 is arranged between two adjacent first thermal management components 40, and a first flow channel 401 for accommodating a heat exchange medium is formed inside the first thermal management component 40; the first current collector 41 is arranged at one end of the first thermal management component 40 in the second direction Y, and the first current collector 41 has a first medium inlet 411 and a first medium outlet 412, and the first direction X is perpendicular to the second direction Y; the first connecting pipe 42 is arranged in the first sub-accommodating chamber 110A, and is used to connect the first medium inlet 411 of two adjacent first current collectors 41; the second connecting pipe 43 is arranged in the first sub-accommodating chamber 110A, and is used to connect the first medium outlet 412 of two adjacent first current collectors 41; one end of the first medium input pipe 44 is connected to the one of the multiple first thermal management components 40 farthest from the partition beam 12; one end of the first medium output pipe 45 is connected to the one of the multiple first thermal management components 40 closest to the partition beam 12; wherein the surface with the largest area of ​​the first battery cell 21 and the surface with the largest area of ​​the second battery cell 31 are both perpendicular to the first direction X.

[0178] The first medium output pipe 45 is a pipe for the heat exchange medium to flow out of the first thermal management component 40. Exemplarily, the first medium output pipe 45 is connected to the first flow channel 401 in the first thermal management component 40. In this embodiment, a plurality of first thermal management components 40 are arranged in the first sub-accommodation chamber 110A at intervals along the first direction X, and at least one first battery cell 21 is arranged between two adjacent first thermal management components 40 to adjust the temperature of the first battery cell 21, thereby reducing the risk of thermal runaway of the first battery cell assembly 20 and improving the reliability of the battery device 100. The heat exchange medium flows into the plurality of first thermal management components 40 through the first medium input pipe 44 and flows out of the first thermal management component 40 through the first medium output pipe 45; thereby, the flow length of the heat exchange medium flowing through any first thermal management component 40 is the same, thereby making the flow resistance of the heat exchange medium flowing through any first thermal management component 40 the same, and further making the flow rate of the heat exchange medium in any first thermal management component 40 the same, thereby making the first thermal management component 40 more evenly adjust the heat of the first battery cell 21 in the first battery cell assembly 20, reducing the risk of uneven heat distribution in the first battery cell assembly 20, and improving the reliability of the first battery cell assembly 20.

[0179] According to some embodiments of this application, please refer to Figure 7 , and please refer to Figure 3 and Figure 4 The battery device 100 also includes a second thermal management component 50, a second medium input pipe 54 and a second medium output pipe 55; a plurality of second thermal management components 50 are arranged in the second sub-accommodation cavity 110B at intervals along the first direction X, at least one second battery cell 31 is arranged between two adjacent second thermal management components 50, and a second flow channel 501 for accommodating a heat exchange medium is formed inside the second thermal management component 50; one end of the second medium input pipe 54 is connected to the one of the plurality of second thermal management components 50 that is farthest from the partition beam 12; one end of the second medium output pipe 55 is connected to the one of the plurality of second thermal management components 50 that is closest to the partition beam 12.

[0180] The second medium output pipe 55 is a pipe for the heat exchange medium to flow out of the second thermal management component 50 . Exemplarily, the second medium output pipe 55 is in communication with the second flow channel 501 in the second thermal management component 50 .

[0181] In some embodiments, the first medium input pipe 44 is connected to the first medium inlet 411 of one of the multiple first thermal management components 40 that is farthest from the partition beam 12, and the first medium output pipe 45 is connected to the first medium outlet 412 of one of the multiple first thermal management components 40 that is closest to the partition beam 12; the second medium input pipe 54 is connected to the second medium inlet 511 of one of the multiple second thermal management components 50 that is farthest from the partition beam 12, and the second medium output pipe 55 is connected to the second medium outlet 512 of one of the multiple second thermal management components 50 that is closest to the partition beam 12.

[0182] Specifically, taking the heat exchange medium flowing in from the first medium input pipe 44 as an example, after the heat exchange medium enters the first medium inlet 411 of one of the multiple first thermal management components 40 that is farthest from the partition beam 12 from the first medium input pipe 44, part of the heat exchange medium enters the first flow channel 401 of the thermal management component and flows out from the first medium outlet 412 to flow through the second connecting pipe 43 to the first medium outlet 412 of one of the multiple first thermal management components 40 that is closest to the partition beam 12, so as to flow out from the first medium output pipe 45; the remaining part can enter the first medium inlet 411 of the adjacent first thermal management part along the first connecting pipe 42, and finally flow out from the first medium output pipe 45.

[0183] In this embodiment, the heat exchange medium flows into the multiple first thermal management components 40 through the first medium input pipe 44, and flows out of the multiple first thermal management components 40 through the first medium output pipe 45; the heat exchange medium flows into the multiple second thermal management components 50 through the second medium input pipe 54, and flows out of the multiple second thermal management components 50 through the second medium output pipe 55, so that the circulation of the heat exchange medium in the multiple first thermal management components 40 and the multiple second thermal management components 50 is relatively independent, thereby reducing the impact of one of the first thermal management components 40 and the second thermal management component 50 on the other when one leaks, thereby improving the reliability of the battery cell.

[0184] According to some embodiments of this application, please refer to Figure 7 , one of the plurality of first heat management components 40 that is closest to the partition beam 12 abuts against the partition beam 12 ; and one of the plurality of second heat management components 50 that is closest to the partition beam 12 abuts against the partition beam 12 .

[0185] It can be understood that the one of the multiple first thermal management components 40 closest to the partition beam 12 abuts against the partition beam 12, so that when the first thermal management component 40 is subjected to the expansion force of the first battery cell 21, the partition beam 12 can provide support force to the first thermal management component 40 to limit the expansion of the first battery cell 21. The one of the multiple second thermal management components 50 closest to the partition beam 12 abuts against the partition beam 12, so that when the second thermal management component 50 is subjected to the expansion force of the second battery cell 31, the partition beam 12 can provide support force to the second thermal management component 50 to limit the expansion of the second battery cell 31.

[0186] In some embodiments, the first thermal management component 40 is connected to the partition beam 12 by means of bolt locking, gluing, foam support, etc., and / or the first thermal management component 40 is connected to the partition beam 12 by means of bolt locking, gluing, foam support, etc., so that the first thermal management component 40 and the second thermal management component 50 and the partition beam provide support to each other, thereby improving the structural strength of the box body 10.

[0187] In this embodiment, the one of the multiple first thermal management components 40 that is closest to the partition beam 12 abuts against the partition beam 12; the one of the multiple second thermal management components 50 that is closest to the partition beam 12 abuts against the partition beam 12. On the one hand, when the one of the multiple first thermal management components 40 that is closest to the partition beam 12 is subjected to the expansion force of the first battery cell 21, and / or the one of the multiple second thermal management components 50 that is closest to the partition beam 12 is subjected to the expansion force of the second battery cell, the partition beam 12 can provide support force to it, so as to reduce the risk of deformation of the one of the multiple first thermal management components 40 that is closest to the partition beam 12, and / or the one of the multiple second thermal management components 50 that is closest to the partition beam 12, thereby improving the reliability of the battery device 100.

[0188] 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 device is used to provide electric energy to the electric device.

[0189] According to some embodiments of the present application, see Figures 2 to 7As shown, an embodiment of the present application provides a battery device 100, including a first battery cell assembly 20, a second battery cell assembly 30 and a box body 10; the first battery cell assembly 20 includes a plurality of first battery cells 21; the second battery cell assembly 30 includes a plurality of second battery cells 31; the box body 10 includes a box body 11 and a partition beam 12, the box body 11 has a accommodating cavity 110, the partition beam 12 is arranged in the accommodating cavity 110, and divides the accommodating cavity 110 into a first sub-accommodating cavity 110A and a second sub-accommodating cavity 110B arranged along a first direction X, the first battery cell assembly 20 is arranged in the first sub-accommodating cavity 110A, and the second battery cell assembly 30 is arranged in the second sub-accommodating cavity 110B; wherein the surface with the largest area of ​​the first battery cell 21 and the surface with the largest area of ​​the second battery cell 31 are both perpendicular to the first direction X. The battery device 100 also includes a first thermal management component 40 and a second thermal management component 50; a plurality of first thermal management components 40 are arranged in the first sub-cavity 110A at intervals along the first direction X, at least one first battery cell 21 is arranged between two adjacent first thermal management components 40, and a first flow channel 401 for accommodating a heat exchange medium is formed inside the first thermal management component 40; a plurality of second thermal management components 50 are arranged in the second sub-cavity 110B at intervals along the first direction X, at least one second battery cell 31 is arranged between two adjacent second thermal management components 50, and a second flow channel 501 for accommodating a heat exchange medium is formed inside the second thermal management component 50. The battery device 100 further includes a first current collector 41 and a second current collector 51; the first current collector 41 is disposed at one end of the first thermal management component 40 in the second direction Y, and the first current collector 41 has a first medium inlet 411 and a first medium outlet 412, and the first direction X is perpendicular to the second direction Y; the second current collector 51 is disposed at one end of the second thermal management component 50 in the second direction Y, and the second current collector 51 has a second medium inlet 511 and a second medium outlet 512. On a plane perpendicular to the first direction X, the orthographic projection of the first current collector 41 and the orthographic projection of the second current collector 51 at least partially overlap. The battery device 100 also includes a first connecting tube 42, a second connecting tube 43, a third connecting tube 52 and a fourth connecting tube 53; the first connecting tube 42 is arranged in the first sub-accommodating chamber 110A, and is used to connect the first medium inlet 411 of two adjacent first current collectors 41; the second connecting tube 43 is arranged in the first sub-accommodating chamber 110A, and is used to connect the first medium outlet 412 of two adjacent first current collectors 41; the third connecting tube 52 is arranged in the second sub-accommodating chamber 110B, and is used to connect the second medium inlet 511 of two adjacent second current collectors 51; the fourth connecting tube 53 is arranged in the second sub-accommodating chamber 110B, and is used to connect the second medium outlet 512 of two adjacent second current collectors 51.The first connecting pipe 42 and the second connecting pipe 43 are arranged along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; the third connecting pipe 52 and the fourth connecting pipe 53 are arranged along the third direction Z. The size of the first sub-accommodating chamber 110A along the first direction X is smaller than the size of the first sub-accommodating chamber 110A along the second direction Y, and the size of the second sub-accommodating chamber 110B along the first direction X is smaller than the size of the second sub-accommodating chamber 110B along the second direction Y. The first flow channel 401 includes a first sub-flow channel 401A and a second sub-flow channel 401B, and the first sub-flow channel 401A and the second sub-flow channel 401B both extend along the second direction Y, one end of the first sub-flow channel 401A is connected to the first medium inlet 411, one end of the second sub-flow channel 401B is connected to the first medium outlet 412, and the other end of the first sub-flow channel 401A is connected to the other end of the second sub-flow channel 401B. The first sub-channels 401A are arranged in a plurality along the third direction Z. The first current collector 41 is provided with a first cavity 413 and a first flow guide 415. The first cavity 413 is connected to the plurality of first sub-channels 401A. The first flow guide 415 is used to connect the first medium inlet 411 and the first cavity 413. The first direction X, the second direction Y and the third direction Z are perpendicular to each other; wherein the extension direction of the first flow guide 415 forms an angle with the second direction Y. The box body 11 includes a bottom plate 111 and a frame 112; the bottom plate 111 is used to carry the first battery cell assembly 20 and the second battery cell assembly 30; the frame 112 is arranged around the bottom plate 111, and the frame 112 and the bottom plate 111 are enclosed to form a receiving cavity 110; wherein the partition beam 12 extends along the second direction Y, and both ends of the partition beam 12 are connected to the frame 112, and the second direction Y is perpendicular to the first direction X. The frame 112 forms an opening at one end away from the bottom plate 111 in the third direction Z. The box body 11 also includes a cover 113; the cover 113 is connected to the frame 112 and closes the opening. The partition beam 12 is respectively connected to the cover 113 and the bottom plate 111.

[0190] In some embodiments, a third flow channel for accommodating a heat exchange medium is formed inside the partition beam 12. The first flow channel 401, the second flow channel 501 and the third flow channel are interconnected. The battery device 100 also includes a first medium input pipe 44, a second medium input pipe 54 and a third medium output pipe 13; one end of the first medium input pipe 44 is connected to the one of the multiple first thermal management components 40 farthest from the partition beam 12; one end of the second medium input pipe 54 is connected to the one of the multiple second thermal management components 50 farthest from the partition beam 12; one end of the third medium output pipe 13 is connected to the partition beam 12.

[0191] In some embodiments, the battery device 100 further includes a first medium input pipe 44, a first medium output pipe 45, a second medium input pipe 54, and a second medium output pipe 55; one end of the first medium input pipe 44 is connected to the one of the plurality of first thermal management components 40 farthest from the partition beam 12; one end of the first medium output pipe 45 is connected to the one of the plurality of first thermal management components 40 closest to the partition beam 12; one end of the second medium input pipe 54 is connected to the one of the plurality of second thermal management components 50 farthest from the partition beam 12; one end of the second medium output pipe 55 is connected to the one of the plurality of second thermal management components 50 closest to the partition beam 12. The one of the plurality of first thermal management components 40 closest to the partition beam 12 abuts against the partition beam 12; the one of the plurality of second thermal management components 50 closest to the partition beam 12 abuts against the partition beam 12.

[0192] 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.

[0193] 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 first battery cell assembly, comprising a plurality of first battery cells; A second battery cell assembly, comprising a plurality of second battery cells; A box body, comprising a box body body and a partition beam, wherein the box body body has a receiving cavity, the partition beam is arranged in the receiving cavity, and divides the receiving cavity into a first sub-receiving cavity and a second sub-receiving cavity arranged along a first direction, the first battery monomer assembly is arranged in the first sub-receiving cavity, the second battery monomer assembly is arranged in the second sub-receiving cavity, and a third flow channel for accommodating a heat exchange medium is formed inside the partition beam; a plurality of first thermal management components, arranged in the first sub-accommodation cavity at intervals along the first direction, at least one of the first battery cells is arranged between two adjacent first thermal management components, a first flow channel for accommodating a heat exchange medium is formed inside the first thermal management component, and the first flow channel is connected to the third flow channel; A first current collector is disposed at one end of the first heat management component in the second direction, the first current collector has a first medium inlet and a first medium outlet, and the first direction is perpendicular to the second direction; a first connecting pipe, disposed in the first sub-accommodating chamber and used for connecting the first medium inlets of two adjacent first current collectors; a second connecting pipe, disposed in the first sub-accommodating chamber and used for connecting the first medium outlets of two adjacent first current collectors; a first medium input pipe, one end of which is connected to one of the plurality of first thermal management components that is farthest from the partition beam; a third medium output pipe, one end of which is connected to the partition beam; Wherein, the surface with the largest area of ​​the first battery cell and the surface with the largest area of ​​the second battery cell are both perpendicular to the first direction.

2. The battery device according to claim 1, characterized in that The battery device further comprises: A plurality of second thermal management components are arranged in the second sub-accommodation cavity at intervals along the first direction, at least one second battery cell is arranged between two adjacent second thermal management components, and a second flow channel for accommodating a heat exchange medium is formed inside the second thermal management component.

3. The battery device according to claim 2, characterized in that: The battery device further comprises: A second current collector is disposed at one end of the second heat management component in the second direction, and the second current collector has a second medium inlet and a second medium outlet.

4. The battery device according to claim 3, characterized in that: On a plane perpendicular to the first direction, an orthographic projection of the first current collector and an orthographic projection of the second current collector at least partially overlap.

5. The battery device according to claim 4, characterized in that: The battery device further comprises: a third connecting pipe, disposed in the second sub-accommodating chamber, and used for connecting the second medium inlets of two adjacent second current collectors; A fourth connecting pipe is disposed in the second sub-accommodating chamber and is used to connect the second medium outlets of two adjacent second current collectors.

6. The battery device according to claim 5, characterized in that The first connecting tube and the second connecting tube are arranged along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The third connecting pipe and the fourth connecting pipe are arranged along the third direction.

7. The battery device according to claim 5, characterized in that: The size of the first sub-accommodating cavity along the first direction is smaller than the size of the first sub-accommodating cavity along the second direction, and the size of the second sub-accommodating cavity along the first direction is smaller than the size of the second sub-accommodating cavity along the second direction.

8. The battery device according to claim 3, characterized in that: The first flow channel includes a first sub-flow channel and a second sub-flow channel, both of which extend along the second direction, one end of the first sub-flow channel is connected to the first medium inlet, one end of the second sub-flow channel is connected to the first medium outlet, and the other end of the first sub-flow channel is connected to the other end of the second sub-flow channel.

9. The battery device according to claim 8, characterized in that: The first sub-channels are arranged in a plurality along the third direction, a first cavity and a first flow guide are provided in the first current collector, the first cavity is connected to the plurality of the first sub-channels, the first flow guide is used to connect the first medium inlet and the first cavity, and the first direction, the second direction and the third direction are perpendicular to each other; Wherein, an extending direction of the first flow guiding channel forms an angle with the second direction.

10. The battery device according to claim 2, characterized in that: The second flow channel and the third flow channel are communicated with each other.

11. The battery device according to claim 10, characterized in that: The battery device further comprises: A second medium input pipe, one end of which is connected to one of the plurality of second heat management components which is farthest from the partition beam.

12. The battery device according to claim 1, wherein: The box body comprises: A bottom plate, the bottom plate is used to carry the first battery monomer assembly and the second battery monomer assembly; A frame, the frame is arranged around the bottom plate, and the frame and the bottom plate are combined to form the accommodating cavity; The partition beam extends along a second direction, two ends of the partition beam are connected to the frame, and the second direction is perpendicular to the first direction.

13. The battery device according to claim 12, characterized in that: The frame forms an opening at one end away from the bottom plate in the third direction, and the box body further comprises: A cover body is connected to the frame and closes the opening, and the partition beams are respectively connected to the cover body and the bottom plate.

14. The battery device according to any one of claims 1 to 13, characterized in that: The first battery cell assembly and the second battery cell assembly are connected in series or in parallel.

15. An electrical device, characterized in that: The invention comprises a battery device according to any one of claims 1 to 14, wherein the battery device is used to provide electrical energy.

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