Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device comprises a box body, a battery monomer assembly and a heat management assembly, the battery monomer assembly is accommodated in the box body, the battery monomer assembly comprises at least two connecting pieces and a plurality of battery monomers, the plurality of battery monomers are arranged along a first direction, and the at least two connecting pieces are arranged at two ends of the plurality of battery monomers along the first direction; the at least two battery monomer assemblies are stacked along a second direction, and the first direction and the second direction intersect. The heat management assembly is connected to the box body and arranged between the adjacent battery monomer assemblies in the second direction, the heat management assembly comprises a first heat management part and a beam structure, the connecting piece is connected to the beam structure, and the first heat management part is connected to the beam structure and is in heat conduction connection with the battery monomers on one side. The battery device provided by the utility model is beneficial to simplifying the structure of the battery device and improving the energy density of the battery device.

Description

Technical Field

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

[0002] Battery devices are widely used in electronic devices, such as mobile phones, laptop computers, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc.

[0003] In the development of battery device technology, in addition to improving the performance of the battery device, the energy density of the battery device is also an issue that needs to be considered. Therefore, how to improve the energy density of the battery device is an issue that needs to be continuously improved in battery device technology. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which are beneficial to improving the energy density of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In the first aspect, the battery device provided by the embodiment of the present application includes a box, a battery cell assembly and a thermal management assembly, the battery cell assembly is accommodated in the box, the battery cell assembly includes at least two connectors and a plurality of battery cells, the plurality of battery cells are arranged along a first direction, at least two connectors are provided at both ends of the plurality of battery cells along the first direction, at least two battery cell assemblies are stacked along a second direction, and the first direction and the second direction intersect. The thermal management assembly is connected to the box and is provided between the battery cell assemblies adjacent to each other along the second direction, the thermal management assembly includes a first thermal management component and a beam structure, the connector is connected to the beam structure, the first thermal management component is connected to the beam structure, and is thermally connected to the battery cells on one side.

[0007] The battery device provided in the embodiment of the present application is provided with at least two battery cell assemblies stacked along a second direction, and a thermal management assembly is provided between two battery cell assemblies adjacent to each other along the second direction, and the thermal management assembly includes a first thermal management component and a beam structure, so as to perform heat exchange with the battery cell through the first thermal management component, and provide a bearing function for the battery cell assembly through the connection between the beam structure and the connecting piece. In this way, the thermal management assembly not only has a bearing function for the battery cell assembly, but also can perform heat exchange with the battery cell, which is beneficial to reducing the number of components in the battery device, and is beneficial to improving the energy density of the battery device while simplifying the overall structure of the battery device.

[0008] According to some embodiments of the present application, at least three battery cell assemblies are stacked along the second direction, and a thermal management assembly is provided between any two adjacent battery cell assemblies along the second direction.

[0009] In the above scheme, it is beneficial to improve the energy density of the battery device while also improving the reliability and structural stability of the battery device.

[0010] According to some embodiments of the present application, at least two battery cell assemblies are arranged along a first direction.

[0011] In the above solution, a plurality of battery cell assemblies are arranged in multiple layers along the second direction, and the battery cell assemblies of each layer are arranged at least along the first direction, which is beneficial to improve the energy density of the battery device.

[0012] According to some embodiments of the present application, at least two battery cell assemblies are arranged along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0013] In the above solution, the plurality of battery cell assemblies are arranged in multiple layers along the second direction, and the battery cell assemblies of each layer are arranged at least along the third direction, which is beneficial to improving the energy density of the battery device.

[0014] According to some embodiments of the present application, the beam structure includes at least one first beam and at least one second beam, the first beam extends along a third direction, the second beam extends along the first direction, and the first direction and the second direction are perpendicular to the third direction. The battery cell assembly is provided with a first beam on at least one side along the first direction, and a second beam on at least one side along the third direction.

[0015] In the above scheme, it is helpful to reduce the risk of the battery cell assembly shaking on the thermal management assembly, and further helps to improve the bearing effect of the first thermal management assembly on the battery cell assembly, thereby improving the structural stability of the battery cell assembly.

[0016] According to some embodiments of the present application, at least two battery cell assemblies are arranged along a first direction, at least one first beam has a first mounting hole and a second mounting hole, the first mounting hole is connected to a connector of the battery cell assembly on one side of the first direction, the second mounting hole is connected to a connector of the battery cell assembly on the other side of the first direction, and the first mounting hole and the second mounting hole are staggered along a third direction.

[0017] In the above solution, it is helpful to simplify the structure of the battery device and also helpful to reduce the risk of interference between the connectors of two battery cell assemblies adjacent to each other along the first direction.

[0018] According to some embodiments of the present application, the second direction is the direction of gravity, and the first thermal management component is thermally connected to the battery cell located above.

[0019] In the above solution, the thermal management component is conducive to providing better load-bearing and thermal management functions for the battery cell assembly, which is further conducive to improving the structural stability and reliability of the battery device.

[0020] According to some embodiments of the present application, the first thermal management component is adhesively connected to the battery cell above it.

[0021] In the above scheme, it is beneficial to improve the heat dissipation efficiency of the battery cell and the first thermal management component while improving the structural stability of the battery device, thereby improving the reliability of the battery device.

[0022] According to some embodiments of the present application, the battery device further includes a second thermal management component, which is disposed at the bottom of the box body along the second direction and is thermally connected to the bottom battery cell.

[0023] In the above scheme, each layer of battery cell assemblies along the direction of gravity can exchange heat with the first thermal management component or the second thermal management component to improve the control accuracy of the temperature of each layer of battery cell assemblies along the direction of gravity, which is further beneficial to improving the reliability performance of the battery device.

[0024] According to some embodiments of the present application, the box body has a first side wall, the first side wall is parallel to the second direction, the first side wall has a step surface, and the beam structure is connected to the step surface.

[0025] In the above scheme, by setting the first side wall of the box body with a step surface so as to connect with the beam structure through the step surface, the connection between the beam structure and the box body is facilitated, and it is beneficial to increase the bearing area of ​​the box body on the beam structure, thereby helping to improve the bearing capacity and bearing stability of the box body on the thermal management component, and further helping to improve the structural stability of the battery device.

[0026] According to some embodiments of the present application, the thermal management assembly further includes a connecting member, wherein the connecting member connects the beam structure and the step surface.

[0027] In the above solution, by providing a connecting member to connect the beam structure and the step surface, it is beneficial to improve the connection convenience and connection reliability between the thermal management component and the step surface of the box.

[0028] According to some embodiments of the present application, the battery cell includes a first pressure relief mechanism and a shell, the first pressure relief mechanism is arranged on the side of the shell along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0029] In the above scheme, by arranging the first pressure relief mechanism on the side of the shell along the third direction, the larger space of the battery cell along the third direction can be used for pressure relief, so that in the event of thermal runaway of the battery cell, the first pressure relief mechanism can be activated in time to release the pressure inside the battery cell in time.

[0030] According to some embodiments of the present application, the battery device includes multiple battery cell assemblies, the multiple battery cells are arranged in two rows along a third direction, and the first pressure relief mechanism in one battery cell assembly is provided on a side of the housing facing away from another battery cell assembly along the third direction.

[0031] In the above scheme, during the pressure release process of the battery cells, the emissions will be discharged away from the battery cells on the other side of the third direction. There is more space for the emissions to be discharged, which is beneficial to improving the smoothness of the discharge of the battery cells and reducing the impact of high-temperature and high-pressure emissions on other battery cells, which is further beneficial to improving the reliability of the battery device.

[0032] According to some embodiments of the present application, the battery device also includes multiple second pressure relief mechanisms, which are arranged in the box body; at least two second pressure relief mechanisms are arranged at intervals along the second direction, and different second pressure relief mechanisms arranged along the second direction are arranged opposite to different battery cell assemblies.

[0033] In the above scheme, in the case of thermal runaway of the battery device, the emissions in the box can be discharged in time through the second pressure relief mechanism, which is helpful to reduce the risk of explosion of the battery device due to thermal runaway.

[0034] According to some embodiments of the present application, the first thermal management component has a flow channel, the flow channel has an inlet and an outlet, and the flow channel is configured to enable a fluid to flow into the flow channel through the inlet and flow out of the flow channel through the outlet.

[0035] In the above scheme, the first thermal management component takes away the temperature of the battery cell through the circulation of the low-temperature flow medium in the flow channel, or heats the battery cell through the circulation of the high-temperature medium in the flow channel, which is beneficial to improve the accuracy of battery cell temperature control and further helps to improve the reliability of the battery device.

[0036] In a second aspect, the electrical device provided in the embodiments of the present application includes the battery device provided in any of the above embodiments.

[0037] The electric device provided in the embodiment of the present application has the same technical effect as the battery device provided in the above embodiment, and thus will not be described in detail here.

[0038] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0041] Figure 2 A schematic diagram of the structure of a battery device provided in an embodiment of the present application;

[0042] Figure 3 A schematic diagram of the structure of a battery cell assembly in a battery device provided in an embodiment of the present application;

[0043] Figure 4 A schematic diagram of the explosion structure of a battery cell in a battery device provided in an embodiment of the present application;

[0044] Figure 5 A schematic diagram of the structure of a thermal management component in a battery device provided in an embodiment of the present application;

[0045] Figure 6 A partial structural schematic diagram of a battery device provided in an embodiment of the present application;

[0046] Figure 7 Another partial structural schematic diagram of a battery device provided in an embodiment of the present application.

[0047] In the drawings, the figures are not necessarily drawn to scale.

[0048] Description of reference numerals:

[0049] 1-Vehicle; 1a-Motor; 1b-Controller;

[0050] 10-battery device; 11-box; 111-first sub-box; 112-second sub-box; 113-first side wall; 113a-step surface;

[0051] 20-battery monomer assembly; 21-connector;

[0052] 30 - battery cell; 31 - shell; 311 - housing; 312 - end cover; 32 - electrode assembly; 321 - electrode body; 322 - pole ear; 33 - electrode terminal; 34 - first pressure relief mechanism;

[0053] 40-thermal management component; 41-first thermal management component; 42-beam structure; 421-first beam; 421a-first mounting hole; 421b-second mounting hole; 422-second beam; 43-connecting member;

[0054] 50 - a second thermal management component;

[0055] 60- second pressure relief mechanism;

[0056] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0057] 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 and completely 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.

[0058] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning 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.

[0059] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0060] 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.

[0061] 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.

[0062] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] The battery cells may be, 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 storage batteries, etc.

[0072] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0073] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0074] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0075] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, stainless steel, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium with surface silver plating may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0076] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for battery cells may also be used.

[0077] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0078] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, copper, aluminum, carbon electrode, carbon, nickel or titanium.

[0079] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0080] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0081] In some embodiments, the diaphragm is an isolation membrane. The present application has no particular limitation on the type of isolation membrane, and any known isolation membrane with a porous structure having good chemical stability and mechanical stability can be selected.

[0082] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.

[0083] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0084] 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.

[0085] In some embodiments, the electrode assembly is a laminate structure.

[0086] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0087] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0088] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab of the electrode assembly. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through a current collector. The electrode terminal may be disposed on an end cap, or may be disposed on the housing.

[0089] In some embodiments, an explosion-proof valve is provided on the housing, and the explosion-proof valve is used to release the internal pressure of the battery cell.

[0090] As an example, the battery cell can 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 prismatic battery, such as a hexagonal prismatic battery, etc. There is no particular limitation in the embodiments of the present application.

[0091] The battery device includes a battery cell assembly, which includes multiple battery cells. The battery cell assembly is usually arranged in a layer, that is, multiple battery cells are arranged in two directions at most, so that the box can better provide bearing function for the battery cells. In this way, the battery device as a whole occupies more space and is not conducive to improving the energy density of the battery device.

[0092] In the related art, when battery cell assemblies are stacked, in order to provide good heat exchange and load-bearing functions for the battery cells, more components are usually arranged between two layers of battery cell assemblies. The structure is complex and occupies more space inside the battery device, which still limits the improvement of the energy density of the battery device.

[0093] In view of this, the battery device provided in the embodiment of the present application includes a box, a battery cell assembly and a thermal management assembly, the battery cell assembly is accommodated in the box, the battery cell assembly includes at least two connectors and a plurality of battery cells, the plurality of battery cells are arranged along a first direction, at least two connectors are provided at both ends of the plurality of battery cells along the first direction, at least two battery cell assemblies are stacked along a second direction, and the first direction and the second direction intersect. The thermal management assembly is connected to the box and is provided between the battery cell assemblies adjacent to each other along the second direction, the thermal management assembly includes a first thermal management component and a beam structure, the connector is connected to the beam structure, the first thermal management component is connected to the beam structure, and is thermally connected to the battery cells on one side.

[0094] The battery device provided in the embodiment of the present application is provided with at least two battery cell assemblies stacked along a second direction, and a thermal management assembly is provided between two battery cell assemblies adjacent to each other along the second direction, and the thermal management assembly includes a first thermal management component and a beam structure, so as to perform heat exchange with the battery cell through the first thermal management component, and provide a bearing function for the battery cell assembly through the connection between the beam structure and the connecting piece. In this way, the thermal management assembly not only has a bearing function for the battery cell assembly, but also can perform heat exchange with the battery cell, which is beneficial to reducing the number of components in the battery device, and is beneficial to improving the energy density of the battery device while simplifying the overall structure of the battery device.

[0095] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using battery devices.

[0096] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The battery device disclosed in the present application can be used to form a power supply system of the electrical device.

[0097] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0098] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device in an embodiment of the present application.

[0099] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1 provided in an embodiment of the present application. The vehicle 1 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 battery device 10 is provided inside the vehicle 1, and the battery device 10 may be provided at the bottom, head or tail of the vehicle 1. The battery device 10 may be used to power the vehicle 1, for example, the battery device 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1.

[0100] The vehicle 1 may further include a controller 1b and a motor 1a, wherein the controller 1b is used to control the battery device 10 to supply power to the motor 1a, for example, to meet the power requirements of starting, navigating, and driving the vehicle 1.

[0101] In some embodiments of the present application, the battery device 10 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0102] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the battery device 10 provided in an embodiment of the present application. Figure 3 Schematic diagram of the structure of the battery cell 30 in the battery device 10 provided in the embodiment of the present application. The battery device 10 includes a box 11 and a battery cell 30, and the battery cell 30 is accommodated in the box 11. Among them, the box 11 is used to provide a storage space for the battery cell 30, and the box 11 can adopt a variety of structures. In some embodiments, the box 11 may include a first sub-box 111 and a second sub-box 112, the first sub-box 111 and the second sub-box 112 cover each other, and the first sub-box 111 and the second sub-box 112 jointly define a storage space for accommodating the battery cell 30. The second sub-box 112 may be a hollow structure with one end open, and the first sub-box 111 may be a plate-like structure, and the first sub-box 111 covers the open side of the second sub-box 112, so that the first sub-box 111 and the second sub-box 112 jointly define a storage space; the first sub-box 111 and the second sub-box 112 may also be hollow structures both with one side open, and the open side of the first sub-box 111 covers the open side of the second sub-box 112.

[0103] In the battery device 10, there may be multiple battery cells 30, and the multiple battery cells 30 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 30 are both connected in series and in parallel. The multiple battery cells 30 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 30 is accommodated in the box 11; of course, the battery device 10 may also be a battery cell assembly 20 in which multiple battery cells 30 are first connected in series, in parallel, or in a mixed connection, and then the multiple battery cell assemblies 20 are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 11. The battery device 10 may also include other structures, for example, the battery device 10 may also include a busbar component for realizing electrical connection between the multiple battery cells 30.

[0104] The battery cell 30 may be a secondary battery or a primary battery; the battery cell 30 may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.

[0105] Please refer to Figure 4 , Figure 4 Schematic diagram of the exploded structure of the battery cell 30 in the battery device 10 provided in the embodiment of the present application. Figure 4As shown, the battery cell 30 includes a housing 31, an electrode assembly 32 and an electrode terminal 33. The housing 31 includes a shell 311 and an end cap 312. The shell 311 has an opening, and the end cap 312 closes the opening to isolate the internal environment of the battery cell 30 from the external environment.

[0106] The shell 311 is a component used to cooperate with the end cap 312 to form the internal environment of the battery cell 30, wherein the formed internal environment can be used to accommodate the electrode assembly 32, the electrolyte and other components. The shell 311 and the end cap 312 can be independent components. The shell 311 can be of various shapes and sizes. Specifically, the shape of the shell 311 can be determined according to the specific shape and size of the electrode assembly 32. The material of the shell 311 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0107] The end cap 312 refers to a component that covers the opening of the shell 311 to isolate the internal environment of the battery cell 30 from the external environment. Without limitation, the shape of the end cap 312 can be adapted to the shape of the shell 311 to match the shell 311. Optionally, the end cap 312 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 312 is not easily deformed when squeezed and collided, so that the battery cell 30 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals 33 can be provided on the end cap 312. The electrode terminal 33 can be used to electrically connect to the electrode assembly 32 for outputting or inputting electrical energy of the battery cell 30. The material of the end cap 312 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating structure may be provided inside the end cap 312, and the insulating structure may be used to isolate the electrical connection components in the housing 311 from the end cap 312 to reduce the risk of short circuit. For example, the insulating structure may be plastic, rubber, or the like.

[0108] The electrode assembly 32 is a component in the battery cell 30 where electrochemical reactions occur. One or more electrode assemblies 32 may be included in the housing 311. The electrode assembly 32 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the electrode body 321 of the electrode assembly 32, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the tabs 322. The positive tab and the negative tab may be located together at one end of the electrode body 321 or at both ends of the electrode body 321, respectively. During the charge and discharge process of the battery cell 30, the positive active material and the negative active material react with the electrolyte, and the tabs 322 connect the electrode terminals 33 to form a current loop.

[0109] First, as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the battery device 10 provided in the embodiment of the present application includes a box body 11, a battery cell assembly 20 and a thermal management assembly 40. The battery cell assembly 20 is accommodated in the box body 11. The battery cell assembly 20 includes at least two connectors 21 and a plurality of battery cells 30. The plurality of battery cells 30 are arranged along a first direction X. At least two connectors 21 are provided at both ends of the plurality of battery cells 30 along the first direction X. At least two battery cell assemblies 20 are stacked along a second direction Y. The first direction X and the second direction Y intersect. The thermal management assembly 40 is connected to the box body 11 and is provided between the battery cell assemblies 20 adjacent to each other along the second direction Y. The thermal management assembly 40 includes a first thermal management component 41 and a beam structure 42. The connector 21 is connected to the beam structure 42. The first thermal management component 41 is connected to the beam structure 42 and is thermally connected to the battery cells 30 on one side.

[0110] The battery cell assembly 20 includes at least two connectors 21 and multiple battery cells 30. The multiple battery cells 30 are arranged along a first direction X. At least two connectors 21 are provided at both ends of the multiple battery cell assemblies 20 along the first direction X. Of course, the battery cell assembly 20 may also include structures such as binding straps, so as to bundle the multiple battery cells 30 and at least two connectors 21 by binding straps, etc., so that the structure of the battery cell assembly 20 is relatively stable.

[0111] At least two connectors 21 are respectively disposed at two ends of the plurality of battery cell assemblies 20 along the first direction X. Of course, connectors 21 may also be disposed at ends of the plurality of battery cells 30 along other directions.

[0112] The battery device 10 includes at least two battery cell assemblies 20, and at least two battery cell assemblies 20 are stacked along the second direction Y. During the arrangement of the battery device 10, the battery cell assemblies 20 can be arranged in at least two layers along the second direction Y. This is beneficial to improving the space utilization inside the battery device 10. According to the space occupied by the battery device 10, the arrangement method between the battery cells 30 is reasonably set to improve the energy density of the battery device 10.

[0113] Optionally, the battery cell assemblies 20 may be stacked in two, three or more layers along the second direction Y. The battery cell assemblies 20 may also be arranged along the first direction X, or the battery cell assemblies 20 may also be arranged in a direction perpendicular to the first direction X and the second direction Y. In other words, along the second direction Y, one, two or four battery cell assemblies 20 may be arranged in each layer.

[0114] In an embodiment where the battery device 10 includes three or more layers of battery cell assemblies 20 arranged along the second direction Y, a thermal management assembly 40 may be disposed between any two layers of battery cell assemblies 20 adjacent to each other along the second direction Y.

[0115] Optionally, the second direction Y may be a gravity direction, or the second direction Y may be a horizontal direction.

[0116] The thermal management assembly 40 includes a beam structure 42 and a first thermal management component 41. Since the connector 21 of the battery cell assembly 20 is connected to the beam structure 42, the thermal management assembly 40 can provide a certain load-bearing effect for the battery cell assembly 20 to improve the structural stability of the battery cell assembly 20. The connector 21 can be plate-shaped or block-shaped, and the connection between the connector 21 and the beam structure 42 can be threaded, pinned, or other connection methods.

[0117] The first thermal management component 41 is connected to the beam structure 42 and is thermally connected to the battery cell 30 on one side along the second direction Y. The first thermal management component 41 can perform heat exchange with the battery cell 30 on one side along the second direction Y to heat or cool the battery cell 30.

[0118] Optionally, the first thermal management component 41 may be plate-shaped and have a flow channel therein to cool the battery cell 30 when a low-temperature medium flows through the flow channel, or to heat the battery cell 30 when a high-temperature medium flows through the flow channel.

[0119] Optionally, the first thermal management component 41 can perform heat exchange with the battery cells 30 on one side along the first direction X, and the battery cells 30 on the other side of the first thermal management component 41 along the first direction X can perform heat exchange through other thermal management components, such as heat exchange with a thermal management component provided on the box body 11.

[0120] The first thermal management component 41 is connected to the beam structure 42. Optionally, the first thermal management component 41 can be welded or threaded to the beam structure 42. The thermal management assembly 40 is connected to the box body 11. The thermal management assembly 40 can be connected to the box body 11 through the beam structure 42, so that the box body 11 provides a certain load-bearing effect for the thermal management assembly 40.

[0121] In this way, the thermal management component 40 is connected to the connecting member 21 of the battery cell assembly 20 through the beam structure 42, so as to provide a certain bearing effect for the battery cell assembly 20 on at least one side along the second direction Y, which is conducive to improving the structural stability of the battery cell assembly 20, and is thermally connected to the battery cell assembly 20 on one side along the second direction Y through the first thermal management component 41, so as to timely dissipate heat or heat the battery cell 30, which is conducive to improving the convenience of temperature control of the battery cell 30 and improving the working reliability of the battery device 10. In addition, the thermal management component 40 integrates the beam structure 42 and the first thermal management component 41 together, which is conducive to simplifying the internal structure of the battery device 10, so as to improve the space utilization rate inside the battery device 10, and further to improve the energy density of the battery device 10.

[0122] In addition, the thermal management component 40 is arranged between two battery cell assemblies 20 arranged along the second direction Y, which can provide a certain barrier effect for the two. In the event of thermal runaway of the battery cell 30 on either side of the thermal management component 40, the thermal management component 40 can reduce the risk of thermal runaway spreading to the battery cell 30 on the other side.

[0123] The battery device 10 provided in the embodiment of the present application is provided with at least two battery cell assemblies 20 stacked along the second direction Y, and a thermal management assembly 40 is provided between two adjacent battery cell assemblies 20 along the second direction Y, and the thermal management assembly 40 includes a first thermal management component 41 and a beam structure 42, so as to perform heat exchange with the battery cell 30 through the first thermal management component 41, and provide a bearing function for the battery cell assembly 20 through the connection between the beam structure 42 and the connecting member 21. In this way, the thermal management assembly 40 not only has a bearing function for the battery cell assembly 20, but also can perform heat exchange with the battery cell 30, which is beneficial to reducing the number of components in the battery device 10, and is beneficial to improving the energy density of the battery device 10 while simplifying the overall structure of the battery device 10.

[0124] In some embodiments, Figure 2 As shown, at least three battery cell assemblies 20 are stacked along the second direction Y, and a thermal management assembly 40 is provided between any two adjacent battery cell assemblies 20 along the second direction Y.

[0125] Optionally, the battery cell assemblies 20 may be stacked in 3, 4 or more layers along the second direction Y, and one, two, three or four battery cell assemblies 20 may be disposed in each layer along the second direction Y. This helps to improve the overall energy density of the battery device 10.

[0126] A thermal management component 40 is provided between any two battery cell assemblies 20 adjacent to each other along the second direction Y. The thermal management components 40 can provide support for the multi-layer battery cell assemblies 20 and perform heat exchange with the multi-layer battery cells 30, which is beneficial to improving the reliability and structural stability of the battery device 10.

[0127] Therefore, such a configuration is beneficial to improving the energy density of the battery device 10 while also improving the reliability and structural stability of the battery device 10 .

[0128] In some embodiments, Figure 2 As shown, at least two battery cell assemblies 20 are arranged along the first direction X.

[0129] At least two battery cell assemblies 20 are arranged along the first direction X. Thus, multiple battery cell assemblies 20 are arranged in multiple layers along the second direction Y, and each layer of battery cell assemblies 20 is also arranged at least along the first direction X. This helps to improve the energy density of the battery device 10.

[0130] In some embodiments, Figure 2 As shown, at least two battery cell assemblies 20 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.

[0131] In this way, the plurality of battery cell assemblies 20 are arranged in multiple layers along the second direction Y, and the battery cell assemblies 20 of each layer are arranged at least along the third direction Z, which is beneficial to improving the energy density of the battery device 10 .

[0132] Of course, each layer of battery cell assemblies 20 may also be arranged in an array along the first direction X and the third direction Z, which is beneficial to further improve the energy density of the battery device 10 .

[0133] In some embodiments, Figure 5 As shown, the beam structure 42 includes at least one first beam 421 and at least one second beam 422, the first beam 421 extends along the third direction Z, the second beam 422 extends along the first direction X, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. The battery cell assembly 20 is provided with the first beam 421 on at least one side along the first direction X, and the second beam 422 on at least one side along the third direction Z.

[0134] In this way, the connecting piece 21 of at least one end of any battery cell assembly 20 along the first direction X can be connected to the first beam 421, which is beneficial to improving the stability of the connection between the battery cell assembly 20 and the beam structure 42, and because the battery cell assembly 20 is provided with a second beam 422 on at least one side along the third direction Z, the battery cell assembly 20 can be provided with a certain limiting effect by the first beam 421 on at least one side of the first direction X and the second beam 422 on at least one side of the third direction Z, so as to reduce the risk of the battery cell assembly 20 shaking on the thermal management assembly 40, which is further beneficial to improving the bearing effect of the first thermal management assembly 40 on the battery cell assembly 20, thereby improving the structural stability of the battery cell assembly 20.

[0135] In some embodiments, Figure 2 and Figure 5 As shown, at least two battery cell assemblies 20 are arranged along a first direction X, at least one first beam 421 has a first mounting hole 421a and a second mounting hole 421b, the first mounting hole 421a is connected to the connector 21 of the battery cell assembly 20 on one side along the first direction X, the second mounting hole 421b is connected to the connector 21 of the battery cell assembly 20 on the other side along the first direction X, and the first mounting hole 421a and the second mounting hole 421b are staggered along a third direction Z.

[0136] In this way, at least one first beam 421 is connected to the connecting parts 21 of the battery cell assembly 20 on both sides along the first direction X through the first mounting hole 421a and the second mounting hole 421b respectively, which is beneficial to improve the connection reliability between the battery cell assembly 20 and the beam structure 42 while also helping to simplify the structure of the beam structure 42.

[0137] Furthermore, since the first mounting hole 421 a and the second mounting hole 421 b are staggered along the third direction Z, the risk of interference between the connection positions of the two battery cells 30 can be reduced.

[0138] Therefore, such a configuration is beneficial to simplifying the structure of the battery device 10 and also beneficial to reducing the risk of the connectors 21 of two battery cell assemblies 20 adjacent to each other along the first direction X interfering with each other.

[0139] In some embodiments, the second direction Y is the gravity direction, and the first thermal management component 41 is thermally connected to the battery cell 30 located above.

[0140] The second direction Y is the direction of gravity, and at least two battery cell assemblies 20 are stacked along the direction of gravity. Under the action of gravity, the battery cell assembly 20 is naturally thermally connected to the first thermal management component 41 below, and the first thermal management component 41 below provides a bearing function for the corresponding battery cell assembly 20.

[0141] Therefore, such a configuration is beneficial for the thermal management assembly 40 to provide better load-bearing and thermal management functions for the battery cell assembly 20 , and is further beneficial for improving the structural stability and reliability of the battery device 10 .

[0142] In some embodiments, the first thermal management component 41 is adhesively connected to the battery cell 30 thereon.

[0143] Specifically, after the thermal management assembly 40 is installed, a glue layer may be coated on the first thermal management component 41 , and then the battery cells 30 may be placed on the glue layer.

[0144] By setting the first thermal management component 41 to be adhesively connected to the battery cell 30 above it, the risk of the battery cell 30 shaking relative to the first thermal management component 41 is reduced, and the adhesive between the battery cell 30 and the first thermal management component 41 can provide a certain heat conduction effect for the battery cell 30 and the first thermal management component 41, which is beneficial to improve the heat exchange efficiency between the battery cell 30 and the first thermal management component 41.

[0145] Therefore, such a configuration is beneficial to improving the heat dissipation efficiency of the battery cell 30 and the first thermal management component 41 while improving the structural stability of the battery device 10 , thereby improving the reliability of the battery device 10 .

[0146] In some embodiments, Figure 2 As shown, the battery device 10 further includes a second thermal management component 50 , which is disposed at the bottom of the box body 11 along the second direction Y and is thermally connected to the bottom battery cell 30 .

[0147] The second thermal management component 50 is located at the bottom of the box 11 in the gravity direction, and the second thermal management component 40 can perform heat exchange for the battery monomer assembly 20 at the bottom. The second thermal management component 50 can be arranged in the box 11, or the second thermal management component 50 can be integrated at the bottom of the box 11 and integrated with the relevant structures of the box 11.

[0148] In this way, each layer of battery cell assemblies 20 along the direction of gravity can exchange heat with the first thermal management component 41 or the second thermal management component 50, so as to improve the control accuracy of the temperature of each layer of battery cell assemblies 20 along the direction of gravity, which is further beneficial to improving the reliability performance of the battery device 10.

[0149] In some embodiments, Figure 6 and Figure 7 As shown, the box body 11 has a first side wall 113 , the first side wall 113 is parallel to the second direction Y, the first side wall 113 has a step surface 113 a , and the beam structure 42 is connected to the step surface 113 a .

[0150] Since the battery cell assemblies 20 are arranged in two or more layers along the second direction Y, the battery device 10 may include one, two or more thermal management components 40, and each thermal management component 40 may be provided with a certain bearing effect by the box body 11 through the cooperation of the beam structure 42 and the step surface 113a.

[0151] The box body 11 may have one, two or more first side walls 113 , that is, a step surface 113 a may be provided on one, two or more side walls of the box body 11 parallel to the second direction Y.

[0152] Therefore, the first side wall 113 of the box body 11 may have one, two or more step surfaces 113a. In an embodiment where the first side wall 113 has two or more step surfaces 113a, different step surfaces 113a may be spaced apart along the second direction Y so that different step surfaces 113a provide load-bearing functions for the beam structures 42 of different thermal management components 40.

[0153] By setting the first side wall 113 of the box body 11 to have a step surface 113a, so as to be connected to the beam structure 42 through the step surface 113a, the connection between the beam structure 42 and the box body 11 is facilitated, and it is beneficial to increase the bearing area of ​​the box body 11 for the beam structure 42, thereby facilitating the improvement of the bearing capacity and bearing stability of the box body 11 for the thermal management component 40, and further beneficial to improving the structural stability of the battery device 10.

[0154] In some embodiments, Figure 5 and Figure 7 As shown, the thermal management assembly 40 further includes a connecting member 43 , and the connecting member 43 connects the beam structure 42 and the step surface 113 a .

[0155] Optionally, the connecting member 43 may be in the shape of a plate, a block or a strip, etc., and the connecting piece 21 may have a suitable structural type. For example, the connecting member 43 may be in an "L" shape or a "T" shape, etc., and the size of the connecting member 43 may be set as needed to facilitate the connection between the thermal management component 40 and the box body 11 through the connecting member 43.

[0156] Specifically, hole structures can be provided on the connecting member 43 and the step surface 113a, respectively, and pins or bolts can be inserted into the hole structures on the connecting member and the step surface 113a, respectively.

[0157] The connection member 43 is provided to connect the beam structure 42 and the step surface 113 a , which is beneficial to improving the connection convenience and connection reliability between the thermal management component 40 and the step surface 113 a of the box body 11 .

[0158] In some embodiments, Figure 2 and Figure 4 As shown, the battery cell 30 includes a first pressure relief mechanism 34 and a housing 31 . The first pressure relief mechanism 34 is disposed on the side of the housing 31 along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0159] Since the thermal management component 40 is disposed on one side of the battery cell assembly 20 along the second direction Y, and the first thermal management component 41 is thermally connected to the battery cell 30, the space on the side of the battery cell 30 along the second direction Y is small. Since the battery cell assembly 20 is arranged along the first direction X, the space on the side of the battery cell 30 along the first direction X is also small.

[0160] By arranging the first pressure relief mechanism 34 on the side of the shell 31 along the third direction Z, the larger space of the battery cell 30 along the third direction Z can be used for pressure relief, so that in the event of thermal runaway of the battery cell 30, the first pressure relief mechanism 34 can be activated in time to release the pressure inside the battery cell 30 in time.

[0161] In some embodiments, Figure 2 As shown, the battery device 10 includes a plurality of battery cell assemblies 20 , wherein a plurality of battery cells 30 are arranged in two rows along a third direction Z, and a first pressure relief mechanism 34 in one battery cell assembly 20 is disposed on a side of the housing 31 along the third direction Z facing away from another battery cell assembly 20 .

[0162] In this way, the first pressure relief mechanisms 34 in the two groups of battery cell assemblies 20 arranged along the third direction Z are respectively arranged on one side of the battery cell assembly 20 of the battery cell 30 facing away from the other side. In this way, during the pressure relief process of the battery cell 30, the emissions will be discharged away from the battery cell 30 on the other side along the third direction Z. The discharge space for the emissions is more sufficient, which is beneficial to improving the smoothness of the discharge of the emissions from the battery cell 30, and reducing the impact of high-temperature and high-pressure emissions on other battery cells 30, which is further beneficial to improving the reliability performance of the battery device 10.

[0163] In some embodiments, Figure 2 and Figure 7 As shown, the battery device 10 further includes a plurality of second pressure relief mechanisms 60, which are disposed in the box body 11. At least two second pressure relief mechanisms 60 are arranged at intervals along the second direction Y, and different second pressure relief mechanisms 60 arranged along the second direction Y are disposed opposite to different battery cell assemblies 20.

[0164] In this way, the second pressure relief mechanism 60 arranged along the second direction Y can provide a pressure relief channel for different battery cell assemblies 20. In the event of thermal runaway of the battery device 10, the emissions in the box 11 can be discharged in time through the second pressure relief mechanism 60, which is beneficial to reducing the risk of explosion of the battery device 10 due to thermal runaway.

[0165] In some embodiments, the first thermal management component 41 has a flow channel, the flow channel has an inlet and an outlet, and the flow channel is configured to enable a fluid to flow into the flow channel through the inlet and flow out of the flow channel through the outlet.

[0166] In this way, the first thermal management component 41 takes away the temperature of the battery cell 30 through the circulation of the low-temperature flow medium in the flow channel, or heats the battery cell 30 through the circulation of the high-temperature medium in the flow channel, which is beneficial to improving the accuracy of temperature control of the battery cell 30 and further beneficial to improving the reliability performance of the battery device 10.

[0167] In a second aspect, the power-consuming device provided in the embodiments of the present application includes the battery device 10 provided in any of the above embodiments, and the battery device 10 is used to provide electrical energy.

[0168] The electric device provided in the embodiment of the present application has the same technical effect as the battery device 10 provided in any of the above embodiments, and thus will not be described in detail here.

[0169] In some embodiments, Figures 2 to 7As shown, the battery device 10 provided in the embodiment of the present application includes a housing 11, a battery cell assembly 20, a second thermal management component 50 and a thermal management component 40. The battery cell assembly 20 is accommodated in the housing 11. The battery cell assembly 20 includes at least two connectors 21 and a plurality of battery cells 30. The plurality of battery cells 30 are arranged along a first direction X. At least two connectors 21 are provided at both ends of the plurality of battery cells 30 along the first direction X. At least three battery cell assemblies 20 are stacked along a second direction Y. The first direction X and the second direction Y intersect. The thermal management component 40 is connected to the housing 11 and is provided between any two adjacent battery cell assemblies 20 along the second direction Y. The thermal management component 40 includes a first thermal management component 41 and a beam structure 42. The connector 21 is connected to the beam structure 42. The first thermal management component 41 is connected to the beam structure 42 and is thermally connected to the battery cells 30 on one side. At least two battery cell assemblies 20 are arranged along the first direction X, and at least two battery cell assemblies 20 are arranged along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other, and the second direction Y is the gravity direction. The beam structure 42 includes a plurality of first beams 421 and a plurality of second beams 422. The first beams 421 extend along the third direction Z and are arranged at intervals along the first direction X. The second beams 422 extend along the first direction X and are arranged at intervals along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. The battery cell assembly 20 is arranged between two adjacent first beams 421 and between two adjacent second beams 422. At least one first beam 421 has a first mounting hole 421a and a second mounting hole 421b, the first mounting hole 421a is connected to the connector 21 of the battery cell assembly 20 on one side along the first direction X, the second mounting hole 421b is connected to the connector 21 of the battery cell assembly 20 on the other side along the first direction X, and the first mounting hole 421a and the second mounting hole 421b are staggered along the third direction Z. The first thermal management component 41 is bonded and connected to the battery cell 30 located above. The second thermal management component 50 is provided at the bottom of the box body 11 at the bottom along the second direction Y, and is thermally connected to the bottom battery cell 30. The box body 11 has a first side wall 113, the first side wall 113 is parallel to the second direction Y, the first side wall 113 has a step surface 113a, and the beam structure 42 is connected to the step surface 113a. The thermal management assembly 40 also includes a connecting member 43, and the connecting member 43 connects the beam structure 42 and the step surface 113a. The battery cell 30 includes a first pressure relief mechanism 34 and a housing 31. The first pressure relief mechanism 34 is disposed on the side of the housing 31 along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. The plurality of battery cells 30 are arranged in two rows along the third direction Z. The first pressure relief mechanism 34 in one battery cell assembly 20 is disposed on the side of the housing 31 along the third direction Z that is away from another battery cell assembly 20.The first heat management component 41 has a flow channel, the flow channel has an inlet and an outlet, and the flow channel is configured to allow a fluid to flow into the flow channel through the inlet and flow out of the flow channel through the outlet.

[0170] The battery device 10 provided in the embodiment of the present application is provided with at least two battery cell assemblies 20 stacked along the second direction Y, and a thermal management assembly 40 is provided between two adjacent battery cell assemblies 20 along the second direction Y, and the thermal management assembly 40 includes a first thermal management component 41 and a beam structure 42, so as to perform heat exchange with the battery cell 30 through the first thermal management component 41, and provide a bearing function for the battery cell assembly 20 through the connection between the beam structure 42 and the connecting member 21. In this way, the thermal management assembly 40 not only has a bearing function for the battery cell assembly 20, but also can perform heat exchange with the battery cell 30, which is beneficial to reducing the number of components in the battery device 10, and is beneficial to improving the energy density of the battery device 10 while simplifying the overall structure of the battery device 10.

[0171] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Box; A battery cell assembly is contained in the box, the battery cell assembly comprises at least two connectors and a plurality of battery cells, the plurality of battery cells are arranged along a first direction, at least two connectors are provided at both ends of the plurality of battery cells along the first direction, at least two battery cell assemblies are stacked along a second direction, and the first direction and the second direction intersect; A thermal management component is connected to the box body and is arranged between the battery cell assemblies adjacent to each other along the second direction. The thermal management component includes a first thermal management component and a beam structure. The connecting member is connected to the beam structure. The first thermal management component is connected to the beam structure and is thermally connected to the battery cell on one side along the second direction.

2. The battery device according to claim 1, characterized in that: At least three battery cell assemblies are stacked along the second direction, and the thermal management assembly is disposed between any two adjacent battery cell assemblies along the second direction.

3. The battery device according to claim 1, characterized in that: At least two of the battery cell assemblies are arranged along the first direction; and / or, At least two of the battery cell assemblies are arranged along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

4. The battery device according to claim 1, characterized in that: The beam structure includes at least one first beam and at least one second beam, the first beam extends along a third direction, the second beam extends along the first direction, and the first direction and the second direction are perpendicular to the third direction in pairs; The battery cell assembly is provided with the first beam on at least one side along the first direction, and is provided with the second beam on at least one side along the second direction.

5. The battery device according to claim 4, characterized in that: At least two of the battery cell assemblies are arranged along the first direction, and at least one of the first beams has a first mounting hole and a second mounting hole, the first mounting hole is connected to the connecting member of the battery cell assembly on one side of the first direction, and the second mounting hole is connected to the connecting member of the battery cell assembly on the other side of the first direction, and the first mounting hole and the second mounting hole are staggered along the third direction.

6. The battery device according to claim 1, characterized in that: The second direction is the gravity direction, and the first thermal management component is thermally connected to the battery cell located above.

7. The battery device according to claim 6, characterized in that: The first thermal management component is adhesively connected to the battery cell above it.

8. The battery device according to claim 6, characterized in that: The battery device further includes a second heat management component, which is disposed at the bottom of the box body at the lowest point along the second direction and is thermally connected to the lowest battery cell.

9. The battery device according to any one of claims 1 to 8, characterized in that: The box body has a first side wall, the first side wall is parallel to the second direction, the first side wall has a step surface, and the beam structure is connected to the step surface.

10. The battery device according to claim 9, characterized in that: The thermal management assembly further includes a connecting member connecting the beam structure and the step surface.

11. The battery device according to any one of claims 1 to 8, characterized in that: The battery cell includes a first pressure relief mechanism and a shell. The first pressure relief mechanism is arranged on a side of the shell along a third direction. The first direction, the second direction and the third direction are perpendicular to each other.

12. The battery device according to claim 11, characterized in that: The battery device includes a plurality of battery cell assemblies, wherein the plurality of battery cells are arranged in two rows along the third direction, and the first pressure relief mechanism in one battery cell assembly is arranged on a side of the housing facing away from another battery cell assembly along the third direction.

13. The battery device according to any one of claims 1 to 8, characterized in that: The battery device also includes a plurality of second pressure relief mechanisms, which are arranged on the box body; at least two of the second pressure relief mechanisms are arranged at intervals along the second direction, and different second pressure relief mechanisms arranged along the second direction are arranged opposite to different battery cell assemblies.

14. The battery device according to any one of claims 1 to 8, characterized in that: The first heat management component has a flow channel, the flow channel has an inlet and an outlet, and the flow channel is configured to allow a fluid to flow into the flow channel through the inlet and flow out of the flow channel through the outlet.

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

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