Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer, a first heat management part, a second heat management part and a heat conduction part, the battery monomers are accommodated in the box body; the first heat management part is accommodated in the box body and is opposite to the battery monomers along a first direction; the second heat management component is accommodated in the box body, is arranged opposite to the battery monomers along a second direction, is configured to manage the temperature of the battery monomers, and comprises an accommodating part and a phase change material, the accommodating part is provided with an accommodating cavity, the phase change material is accommodated in the accommodating cavity, the accommodating cavity is provided with an opening, and the phase change material is accommodated in the opening; the second direction is perpendicular to the first direction. The heat conduction piece is in heat conduction connection with the first heat management component and blocks the opening, and the heat conduction coefficient of the heat conduction piece is larger than that of the containing part. The heat conduction part can quickly transfer heat in the accommodating cavity to the first heat management part, so that the risk that the temperature of the battery monomers is too low or too high is reduced, and the reliability of the battery device is 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] Battery devices are widely used in portable electronic devices, electric vehicles, electric tools, drones, energy storage devices and other fields. Battery devices include battery cells. In battery technology, in addition to considering the performance of battery devices, the reliability of battery devices is also an issue that cannot be ignored. Based on this, how to improve the reliability of battery devices is an issue that needs to be solved urgently. Utility Model Content

[0004] The embodiments of the present application provide a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising a case, a battery cell, a first thermal management component, a second thermal management component and a heat conductor; the battery cell is accommodated in the case; the first thermal management component is accommodated in the case and is arranged opposite to the battery cell along a first direction, the first thermal management component is provided with a flow channel, the flow channel is used to flow in or out of a fluid medium to manage the temperature of the battery cell; the second thermal management component is accommodated in the case and is arranged opposite to the battery cell along a second direction, the second thermal management component is configured to manage the temperature of the battery cell, the second thermal management component comprises a receiving portion and a phase change material, the receiving portion has a receiving cavity, the phase change material is accommodated in the receiving cavity, the receiving cavity has an opening, and the second direction is perpendicular to the first direction; the heat conductor is thermally connected to the first thermal management component and blocks the opening, and the thermal conductivity of the heat conductor is greater than the thermal conductivity of the receiving portion.

[0006] In the above technical solution, a fluid medium flows into or out of the flow channel of the first thermal management component, and the fluid medium can exchange heat with the first thermal management component, and the first thermal management component can exchange heat with the battery cell, so that the first thermal management component manages the temperature of the battery cell. The second thermal management component and the battery cell are arranged relative to each other along the second direction, and the first thermal management component and the battery cell are arranged relative to each other along the first direction, so that the temperature of the battery cell is jointly managed by the first thermal management component and the second thermal management component in multiple directions, thereby improving the temperature management effect of the battery cell. The phase change material is accommodated in the accommodation portion, and the phase change material can exchange heat with the battery cell, so that a phase change occurs in the accommodation cavity. The thermal conductivity of the heat conducting member is greater than that of the receiving portion, and the heat conducting member seals the opening and is thermally connected to the first thermal management component. The heat conducting member can quickly transfer the heat in the receiving cavity to the first thermal management component, or quickly transfer the heat of the first thermal management component to the receiving cavity, thereby improving the heat exchange efficiency between the second thermal management component and the first thermal management component, thereby improving the ability of the second thermal management component to manage the temperature of the battery cell, allowing the battery cell to be in a relatively stable temperature environment, reducing the risk of the battery cell temperature being too low or too high, thereby reducing the risk of thermal runaway of the battery cell and improving the reliability of the battery device.

[0007] In some embodiments, the battery device includes a plurality of second thermal management components, the plurality of second thermal management components are arranged at intervals along the second direction, a battery cell is arranged between two adjacent second thermal management components, and a heat conductive member connects at least two receiving portions and blocks the openings of the receiving cavities of at least two receiving portions. By arranging a battery cell between two adjacent second thermal management components, the second thermal management components on both sides of the battery cell along the second direction can perform heat exchange with the battery cell, thereby improving the heat absorption or heat dissipation efficiency of the battery cell. The heat conductive member connects at least two receiving portions to facilitate heat exchange between the two second thermal management components, thereby reducing the temperature difference between the second thermal management components and improving the overall temperature control capability of the plurality of second thermal management components on the battery cell.

[0008] In some embodiments, the heat conductor is connected to the same end of at least two receiving parts along the third direction, and the first direction and the second direction are perpendicular to the third direction. In this way, the path for the heat conductor to connect multiple receiving parts can be reduced, the use of heat conductor materials can be reduced, and the material cost of the heat conductor can be saved. The heat conductor is connected to the end of the receiving part, which can reduce the impact of the heat conductor on the battery cell, reduce the risk of the heat conductor contacting the battery cell and causing a short circuit or temperature imbalance in the battery cell, and improve the reliability of the battery device.

[0009] In some embodiments, along the second direction, two adjacent receiving parts are connected by a heat conductive member. In this way, the path of the heat conductive member connecting the two receiving parts is shorter, which, on the one hand, saves the material usage of the heat conductive member and reduces the cost; on the other hand, the shorter path can reduce the heat loss of the heat conductive member, improve the heat conduction efficiency of the heat conductive member between the receiving parts and between the receiving parts and the first thermal management component, and enhance the temperature control effect of the second thermal management component on the battery cell.

[0010] In some embodiments, three adjacent receiving parts are connected by two heat conducting members, and the two heat conducting members are respectively connected to the two ends of the receiving part located in the middle of the three adjacent receiving parts along the third direction, and the first direction and the second direction are both perpendicular to the third direction. In this way, multiple receiving parts are connected in series through multiple heat conducting members, thereby realizing the connection of multiple receiving parts, so that multiple receiving parts can exchange heat through multiple heat conducting members, so that the temperature in the receiving cavities of multiple receiving parts is more uniform, and when the temperature in some receiving cavities is unbalanced, the remaining receiving cavities can exchange heat with the receiving cavities with unbalanced temperature, thereby reducing the risk of failure of the second thermal management component to manage the temperature of the battery cell.

[0011] In some embodiments, the cross section of the heat conducting member perpendicular to the first direction is arc-shaped. Thus, when the positions of two adjacent receiving portions along the second direction change, the heat conducting member can adapt to the position change of the receiving portions by deformation, thereby reducing the risk of damage to the heat conducting member and improving the connection stability and position stability of the heat conducting member and the receiving portions.

[0012] In some embodiments, a plurality of battery cells arranged along a third direction are disposed between two adjacent receiving portions, and the first direction and the second direction are both perpendicular to the third direction. In this way, the two adjacent receiving portions can manage the temperature of the plurality of battery cells at the same time, thereby improving the efficiency of the second thermal management component in managing the temperature of the battery cells.

[0013] In some embodiments, a portion of the heat conducting member extends into the receiving cavity, so as to promote heat exchange between the heat conducting member and the inside of the receiving cavity, thereby improving the heat exchange efficiency between the second heat management component and the first heat management component.

[0014] In some embodiments, the portion of the heat conducting member extending into the receiving cavity contacts the phase change material. In this way, the phase change material in the receiving cavity can directly exchange heat with the heat conducting member, thereby improving the heat exchange efficiency between the phase change material and the first thermal management component, and further improving the heat exchange efficiency between the second thermal management component and the first thermal management component.

[0015] In some embodiments, the thermal conductivity of the heat conducting member is greater than or equal to 100 W / (m·K). In this way, the heat conducting member has a strong thermal conductivity, and can conduct the heat in the receiving cavity to the first thermal management component or conduct the heat of the first thermal management component to the receiving cavity, thereby improving the heat exchange efficiency between the second thermal management component and the first thermal management component.

[0016] In some embodiments, the heat conducting member is made of copper, aluminum, silver or graphite, which reduces the difficulty of obtaining the material of the heat conducting member and also reduces the cost of the heat conducting member.

[0017] In some embodiments, the heat conductor is a heat conducting plate, and the thickness of the heat conducting plate is 0.5mm-2mm. When the thickness of the heat conducting plate is greater than or equal to 0.5mm, the ability of the heat conductor to conduct heat can be improved, thereby promoting the heat exchange efficiency of the first thermal management component and the second thermal management component; when the thickness of the heat conducting plate is less than or equal to 2mm, the size of the heat conductor can be reduced, saving the cost of the heat conductor, and the space occupied by the heat conductor in the box can be reduced, so that there is more space in the box to accommodate battery cells, thereby improving the volume energy density of the battery device. Therefore, when the thickness of the heat conductor is 0.5mm-2mm, it is possible to take into account both the thermal conductivity of the heat conductor and the cost of the heat conductor, and take into account both the heat exchange efficiency of the first thermal management component and the second thermal management component and the volume energy density of the battery device.

[0018] In some embodiments, the battery device further includes a first thermally conductive adhesive layer, and along the first direction, at least a portion of the first thermally conductive adhesive layer is located between the thermally conductive element and the first thermal management component, and connects the thermally conductive element and the first thermal management component. In this way, on the one hand, the first thermally conductive adhesive layer can improve the heat exchange efficiency between the thermally conductive element and the first thermal management component; on the other hand, the first thermally conductive adhesive layer can fix the positions of the thermally conductive element and the first thermal management component, and improve the structural stability of the thermally conductive element and the first thermal management component.

[0019] In some embodiments, the heat conducting member is riveted to the first thermal management component. In this way, the connection between the heat conducting member and the first thermal management component is more stable, and the position where the heat conducting member and the first thermal management component are riveted further promotes the heat exchange between the heat conducting member and the first thermal management component, thereby improving the heat exchange efficiency between the heat conducting member and the first thermal management component.

[0020] In some embodiments, the battery device further includes a first thermally conductive adhesive layer, along the first direction, at least a portion of the first thermally conductive adhesive layer is located between the thermally conductive member and the first thermal management component, and connects the thermally conductive member and the first thermal management component, and a riveting portion is provided at one end of the thermally conductive member facing the first thermal management component, and the riveting portion passes through the first thermally conductive adhesive layer and is riveted to the first thermal management component. In this way, the thermally conductive member and the first thermal management component are connected through the first thermally conductive adhesive layer, and are riveted through the riveting portion, thereby achieving dual fixation of the thermally conductive member and the first thermal management component, and improving the connection stability of the thermally conductive member and the first thermal management component. In addition, both the first thermally conductive adhesive layer and the riveting portion can improve the heat exchange efficiency between the thermally conductive member and the first thermal management component.

[0021] In some embodiments, the battery device further includes a second thermally conductive adhesive layer, and along the second direction, at least a portion of the second thermally conductive adhesive layer is located between the battery cell and the receiving portion, and connects the battery cell and the receiving portion. In this way, on the one hand, the receiving portion and the battery cell can exchange heat through the second thermally conductive adhesive layer, thereby improving the heat exchange efficiency between the battery cell and the receiving portion; on the other hand, the second thermally conductive adhesive layer makes the position of the battery cell and the receiving portion in the box more stable, thereby improving the position stability of the battery cell and the receiving portion.

[0022] In some embodiments, along the second direction, the battery cell has a first surface facing the receiving portion, and the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is 60%-100%. When the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is greater than or equal to 60%, the heat exchange efficiency between the receiving portion and the battery cell can be improved, and the management effect of the temperature of the battery cell by the second thermal management component can be improved; when the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is less than or equal to 100%, the material usage of the receiving portion can be reduced, and the manufacturing cost of the receiving portion can be reduced; therefore, when the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is 60%-100%, it is possible to take into account both the improvement of the heat exchange efficiency between the receiving portion and the battery cell and the manufacturing cost of the receiving portion.

[0023] In some embodiments, the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is 70%-90%. When the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is greater than or equal to 70%, the heat exchange efficiency between the receiving portion and the battery cell can be further improved, and the temperature management effect of the second thermal management component on the battery cell can be improved; when the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is less than or equal to 90%, the material usage of the receiving portion can be further reduced, and the manufacturing cost of the receiving portion can be reduced; therefore, when the ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is 70%-90%, it is possible to further take into account both the improvement of the heat exchange efficiency between the receiving portion and the battery cell and the manufacturing cost of the receiving portion.

[0024] In some embodiments, along the second direction, the battery cell has a first surface facing the receiving portion, and the first surface is the surface with the largest outer surface area of ​​the battery cell. In this way, the second thermal management component is arranged opposite to the first surface of the battery cell, and the second thermal management component can exchange heat with the battery cell through the wall portion where the first surface is located, thereby improving the management effect of the second thermal management component on the temperature of the battery cell.

[0025] In some embodiments, the receiving portion is made of insulating material, so as to reduce the risk of insulation failure between the battery cell and the second thermal management component, and the receiving portion can also separate the battery cell from the box wall of the box along the second direction, reducing the risk of short circuit caused by contact between the battery cell and the box.

[0026] In some embodiments, the material of the receiving portion is fluororubber, polyimide, silicone, epoxy resin or polytetrafluoroethylene.

[0027] In some embodiments, the phase change temperature of the phase change material is 25°C-45°C. By using a phase change material with a phase change temperature between 25°C-45°C, the temperature of the second thermal management component is more easily stabilized at 25°C-45°C, so that the temperature of the battery cell is more easily controlled between 25°C-45°C, thereby improving the performance of the battery cell.

[0028] In some embodiments, the phase change material is potassium aluminum sulfate dodecahydrate, ammonium aluminum sulfate dodecahydrate, n-octadecane, n-eicosane, sodium sulfate decahydrate, or lauric acid.

[0029] In some embodiments, the battery device includes a plurality of battery cells, and the first thermal management component is disposed on only one side of the plurality of battery cells along the first direction, thereby reducing the difficulty of disposing the first thermal management component.

[0030] In some embodiments, the first thermal management component is located at the bottom of the plurality of battery cells, and the first thermal management component is configured to support the plurality of battery cells. In this way, the contact between the battery cells and the first thermal management component can be closer, thereby improving the heat conduction effect between the battery cells and the first thermal management component.

[0031] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery device provided by any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0034] Figure 2 An exploded view of a battery device provided in some embodiments of the present application;

[0035] Figure 3 An exploded view of a battery cell provided for some embodiments of the present application;

[0036] Figure 4 An exploded view of a battery device is provided for some other embodiments of the present application;

[0037] Figure 5 A partial structural schematic diagram of a battery device provided in some embodiments of the present application;

[0038] Figure 6 for Figure 5 AA section view;

[0039] Figure 7 A partial structural schematic diagram of a battery device provided in some embodiments of the present application;

[0040] Figure 8 for Figure 7 BB cross-sectional view;

[0041] Fig. 9 for Figure 8 A partial enlarged view of the middle A area;

[0042] Fig.10 for Figure 7 CC section view;

[0043] Fig.11 for Fig.10 A partial enlarged view of the middle C area;

[0044] Fig.12 A partial structural schematic diagram of a battery device provided in some embodiments of the present application;

[0045] Fig.13 for Fig.12 DD cross-sectional view;

[0046] Fig.14 for Fig.13 A partial enlarged view of the D area in the middle;

[0047] Fig.15 for Fig.12 EE cross-sectional view;

[0048] Fig.16 for Fig.15 A partial enlarged view of the F area.

[0049] Icons: 1-housing; 11-housing; 12-end cap; 2-electrode assembly; 3-electrode terminal; 4-first surface; 10-battery cell;

[0050] 20-box; 201-first box; 202-second box;

[0051] 30-first thermal management component; 301-flow channel; 302-hole portion;

[0052] 40-second thermal management component; 401-accommodation portion; 4011-accommodation cavity; 40111-opening; 402-phase change material;

[0053] 50-heat-conducting member; 501-riveting portion; 60-first heat-conducting adhesive layer; 70-second heat-conducting adhesive layer;

[0054] 100 - battery device; 200 - controller; 300 - motor; 1000 - vehicle; Z - first direction; X - second direction; Y - third direction. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] The term “plurality” used in this application refers to two or more (including two).

[0061] 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.

[0062] 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.

[0063] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0064] 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.

[0065] 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 cell, such as a hexagonal battery cell.

[0066] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0067] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module.

[0068] As an example, a battery module may be formed by bundling a plurality of battery cells by cable ties.

[0069] In some embodiments, the battery device may be a battery pack, which may include a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0070] 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.

[0071] 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.

[0072] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0073] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0074] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0075] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0076] During the use of the battery device, the temperature of the battery cells in the battery device affects the normal use of the battery device. When the temperature of the battery cell is low, the low temperature is likely to slow down the electrochemical reaction in the battery cell and reduce the capacity of the battery cell. When the battery cell is a lithium-ion battery cell, low-temperature charging is also likely to cause lithium precipitation, increasing the risk of short circuit or thermal runaway of the battery cell; when the temperature of the battery cell is high, the high temperature accelerates the chemical reaction of the battery cell and increases the risk of thermal runaway of the battery cell; therefore, the reliability of the battery cell will be affected if the temperature of the battery cell is too high or too low.

[0077] In order to control the temperature of the battery cell, a first thermal management component may be provided in the battery device, and the first thermal management component may be a water cooling plate, and the temperature of the battery cell is managed by controlling the temperature of the fluid medium flowing into or out of the first thermal management component. However, the first thermal management component is usually provided on one side of the battery cell, and the first thermal management component has limited ability to control the temperature of the battery cell, and has a poor effect on the temperature control of the battery cell, and has limited impact on the reliability of the battery device.

[0078] In view of this, in order to improve the reliability of the battery device, an embodiment of the present application provides a battery device, including a case, a battery cell, a first thermal management component, a second thermal management component and a heat conductor. The battery cell is contained in the case. The first thermal management component is contained in the case and is arranged opposite to the battery cell along a first direction. The first thermal management component is provided with a flow channel, and the flow channel is used to flow in or out of the fluid medium to manage the temperature of the battery cell. The second thermal management component is contained in the case and is arranged opposite to the battery cell along a second direction. The second thermal management component is configured to manage the temperature of the battery cell. The second thermal management component includes a receiving portion and a phase change material. The receiving portion has a receiving cavity. The phase change material is contained in the receiving cavity. The receiving cavity has an opening. The second direction is perpendicular to the first direction. The heat conductor is thermally connected to the first thermal management component and blocks the opening. The thermal conductivity of the heat conductor is greater than the thermal conductivity of the receiving portion.

[0079] In such a battery device, the second thermal management component is arranged relative to the battery cell along the second direction, and the first thermal management component is arranged relative to the battery cell along the first direction, so that the temperature of the battery cell is jointly managed by the first thermal management component and the second thermal management component in multiple directions, thereby improving the temperature management effect of the battery cell. The phase change material is contained in the receiving portion, and the phase change material can exchange heat with the battery cell, thereby causing phase change in the receiving cavity. The thermal conductivity of the heat conductor is greater than the thermal conductivity of the receiving portion, and the heat conductor blocks the opening and is thermally connected to the first thermal management component. The heat conductor can quickly transfer the heat in the receiving cavity to the first thermal management component, or quickly transfer the heat of the first thermal management component to the receiving cavity, thereby improving the heat exchange efficiency between the second thermal management component and the first thermal management component, thereby improving the effect of the second thermal management component in managing the temperature of the battery cell, so that the battery cell can be in a relatively stable temperature environment, reducing the risk of the battery cell being too low or too high, thereby reducing the risk of thermal runaway of the battery cell and improving the reliability of the battery device.

[0080] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0081] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0082] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 is provided with a battery device 100 inside, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0083] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0084] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0085] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 may include a case 20 and a battery cell 10 . The case 20 is used to accommodate the battery cell 10 .

[0086] Among them, a closed space for accommodating the battery cell 10 is formed inside the box 20. The box 20 can adopt a variety of structures. In some embodiments, the box 20 may include a first box 201 and a second box 202, and the first box 201 and the second box 202 are buckled with each other. The first box 201 and the second box 202 can be in various shapes, such as a cuboid, a cylinder, etc. The first box 201 can be a hollow structure with one side open, and the second box 202 can also be a hollow structure with one side open. The open side of the second box 202 is buckled with the open side of the first box 201 to form a box 20 with a closed space. It is also possible that the first box 201 is a hollow structure with one side open, and the second box 202 is a plate-like structure. The second box 202 is buckled on the open side of the first box 201, so as to form a box 20 with a accommodating space.

[0087] In the battery device 100, there may be one or more battery cells 10. If there are more than one battery cell 10, the battery cells 10 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the battery cells 10 are both connected in series and in parallel. The battery modules may be formed by connecting the battery cells 10 in series, in parallel, or in a mixed connection, and then the battery modules are formed into a whole by connecting the battery cells in series, in parallel, or in a mixed connection, and then accommodated in the box 20. Alternatively, all the battery cells 10 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by all the battery cells 10 is accommodated in the box 20.

[0088] In some embodiments, the battery device 100 may further include a busbar component (not shown in the figure), and multiple battery cells 10 may be electrically connected through the busbar component to achieve series connection, parallel connection, or mixed connection of multiple battery cells 10. The busbar component may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0089] Please refer to Figure 3 , Figure 3 An exploded view of a battery cell 10 provided in some embodiments of the present application. The battery cell 10 may include a housing 1 and an electrode assembly 2, wherein the electrode assembly 2 is accommodated in the housing 1.

[0090] In some embodiments, the housing 1 may include a shell 11 and an end cap 12, wherein the shell 11 has an opening 40111, and the end cap 12 closes the opening 40111 of the shell 11. The closing here means covering or closing, which may be sealed or unsealed.

[0091] The housing 11 is a component for accommodating the electrode assembly 2. The housing 11 may be a hollow structure with an opening 40111 formed at one end, or a hollow structure with openings 40111 formed at opposite ends. The housing 11 may be in various shapes, such as a cylindrical shape, a rectangular parallelepiped shape, etc. The material of the housing 11 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 2 may be partially located in the housing 11, or may be completely located in the housing 11.

[0092] The end cap 12 and the shell 11 together define a receiving space for accommodating the electrode assembly 2 and other components. The end cap 12 can be connected to the shell 11 by welding, crimping, etc. to close the opening 40111 of the shell 11. The shape of the end cap 12 can be adapted to the shape of the shell 11. For example, the shell 11 is a rectangular parallelepiped structure, and the end cap 12 is a rectangular plate structure adapted to the shell 11. For another example, the shell 11 is a cylindrical structure, and the end cap 12 is a circular plate structure adapted to the shell 11. The material of the end cap 12 can also be a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 12 and the shell 11 can be the same or different.

[0093] In the embodiment where the housing 11 forms an opening 40111 at one end, one end cap 12 may be provided accordingly. In the embodiment where the housing 11 forms openings 40111 at two opposite ends, two end caps 12 may be provided accordingly, the two end caps 12 respectively close the two openings 40111 of the housing 11, and the two end caps 12 and the housing 11 together define a receiving space.

[0094] In some embodiments, the battery cell 10 may further include an electrode terminal 3, which is disposed on the housing 1 and is used to electrically connect to the tab of the electrode assembly 2 to input or output the electrical energy of the battery cell 10. The electrode terminal 3 may be disposed on the shell 11 of the housing 1 or on the end cover 12 of the housing 1. The electrode terminal 3 may be directly connected to the tab, for example, the electrode terminal 3 is welded to the tab. The electrode terminal 3 may also be indirectly connected to the tab, for example, the electrode terminal 3 is indirectly connected to the tab through a current collecting member. The current collecting member may be a metal conductor, for example, copper, iron, aluminum, steel, aluminum alloy, etc.

[0095] As an example, Figure 3 , an opening 40111 is formed at one end of the shell 11, and there is one end cap 12 in the shell 1, and one end cap 12 closes one opening 40111 of the shell 11. Two electrode terminals 3 are provided on the end cap 12, and the two electrode terminals 3 are respectively a positive electrode terminal and a negative electrode terminal. A positive electrode tab and a negative electrode tab are formed at one end of the electrode assembly 2 facing the end cap 12, and the positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0096] Please refer to Figure 4-Figure 6 , Figure 4 An exploded view of a battery device 100 is provided for some other embodiments of the present application; Figure 5 A partial structural schematic diagram of a battery device 100 provided in some embodiments of the present application; Figure 6 for Figure 5AA cross-sectional view. The embodiment of the present application provides a battery device 100, including a housing 20, a battery cell 10, a first thermal management component 30, a second thermal management component 40 and a heat conductor 50. The battery cell 10 is accommodated in the housing 20. The first thermal management component 30 is accommodated in the housing 20 and is arranged opposite to the battery cell 10 along the first direction Z. The first thermal management component 30 is provided with a flow channel 301, and the flow channel 301 is used to flow in or out of the fluid medium to manage the temperature of the battery cell 10. The second thermal management component 40 is accommodated in the housing 20 and is arranged opposite to the battery cell 10 along the second direction X. The second thermal management component 40 is configured to manage the temperature of the battery cell 10. The second thermal management component 40 includes a receiving portion 401 and a phase change material 402. The receiving portion 401 has a receiving cavity 4011. The phase change material 402 is accommodated in the receiving cavity 4011. The receiving cavity 4011 has an opening 40111. The second direction X is perpendicular to the first direction Z. The heat conducting member 50 is thermally connected to the first heat management component 30 and blocks the opening 40111 . The heat conducting member 50 has a greater thermal conductivity than the receiving portion 401 .

[0097] The battery cell 10 , the first thermal management component 30 , the second thermal management component 40 and the heat conducting member 50 are all accommodated in the box body 20 , so that the box body 20 provides protection for the battery cell 10 , the first thermal management component 30 , the second thermal management component 40 and the heat conducting member 50 .

[0098] The number of the battery cell 10 may be one or more.

[0099] Along the first direction Z, the first thermal management component 30 may be provided on only one side of the battery cell 10, or both sides of the battery cell 10 may be provided with the first thermal management component 30. In the embodiment where there are multiple battery cells 10, the first thermal management component 30 may be provided on both sides of the multiple battery cells 10 along the first direction Z, or each battery cell 10 may be provided with the first thermal management component 30 on both sides along the first direction Z.

[0100] The battery cell 10 and the first thermal management component 30 may be spaced apart along the first direction Z, or the battery cell 10 may directly abut against the first thermal management component 30 so that the first thermal management component 30 and the battery cell 10 are disposed opposite to each other along the first direction Z.

[0101] The second thermal management component 40 may be one or more. In the embodiment where there are multiple battery cells 10, the second thermal management component 40 may be provided on both sides of the multiple battery cells 10 along the second direction X; or the second thermal management component 40 may be provided on both sides of each battery cell 10 along the second direction X.

[0102] The first thermal management component 30 is provided with a flow channel 301 for flowing in or out of a fluid medium. The fluid medium flows into the flow channel 301 so that the fluid medium exchanges heat with the first thermal management component 30, thereby managing the temperature of the first thermal management component 30. The first thermal management component 30 exchanges heat with the battery cell 10 to manage the temperature of the battery cell 10. In the process of managing the temperature of the battery cell 10, the temperature of the fluid medium entering the flow channel 301 is regulated to achieve temperature management of the battery cell 10; illustratively, a fluid medium with a temperature of 20°C-45°C is flowed into the flow channel 301 through an external device, and after the fluid medium passes through the flow channel 301, it flows back to the external device to adjust the temperature of the fluid medium, so as to recycle the fluid medium. In the process of heat exchange between the fluid medium in the channel and the first thermal management component 30, the first thermal management component 30 exchanges heat with the battery cell 10 to adjust the temperature of the battery cell 10 to 20°C-45°C. The fluid medium may be a gas, such as air; or a liquid, such as water, ethylene glycol aqueous solution, etc.

[0103] The receiving portion 401 of the second thermal management component 40 has a receiving cavity 4011, and the phase change material 402 is received in the receiving cavity 4011, so that the phase change material 402 is separated from the battery cell 10, the first thermal management component 30 and other components through the receiving portion 401. The receiving cavity 4011 has an opening 40111, and the heat conductive member 50 blocks the opening 40111 to block the phase change material 402 in the receiving cavity 4011, and the heat conductive member 50 can exchange heat with the phase change material 402 to achieve heat exchange between the phase change material 402 and the first thermal management component 30. The heat conductive member 50 may be located outside the receiving cavity 4011; or a part of the heat conductive member 50 may extend into the receiving cavity 4011.

[0104] The phase change material 402 in the receiving cavity 4011 can exchange heat with the battery cell 10. The phase change material 402 absorbs or releases heat during the phase change process to improve the temperature control effect on the battery cell 10. The heat conductive member 50 closes the opening 40111, so that the heat in the receiving cavity 4011 can be directly transferred to the heat conductive member 50, and then directly transferred to the first thermal management component 30 through the heat conductive member 50, so that the heat exchange between the phase change material 402 and the first thermal management component 30 is more efficient, and the temperature control ability of the phase change material 402 on the battery cell 10 is improved. Exemplarily, when the temperature of the battery cell 10 is higher than the preset temperature, in order to quickly adjust the temperature of the battery cell 10 to below the preset temperature, on the one hand, a fluid medium with a temperature lower than the preset temperature can be introduced into the flow channel 301, and the first thermal management component 30 exchanges heat with the battery cell 10 to reduce the temperature of the battery cell 10; on the other hand, the phase change material 402 absorbs the heat of the battery cell 10 and undergoes a phase change to reduce the temperature of the battery cell 10, and the heat conductor 50 can transfer the heat absorbed by the phase change material 402 to the first thermal management component 30, reduce the heat of the phase change material 402, so that the phase change material 402 can absorb more heat, improve the heat absorption capacity of the phase change material 402, and further accelerate the cooling rate of the battery cell 10, so that the temperature of the battery cell 10 can be adjusted to below the preset temperature more quickly. When the fluid medium flows in the flow channel 301, the fluid medium absorbs the heat of the battery cell 10 through the first thermal management component 30, and absorbs the heat of the battery cell 10 through the phase change material 402, and takes the heat out of the battery device 100, thereby achieving overall cooling of the battery device 100 and accelerating the temperature control efficiency of the battery device 100.

[0105] The receiving portion 401 may be in contact with the battery cell 10 or spaced apart from the battery cell 10. The receiving portion 401 may be in contact with the first thermal management component 30 or spaced apart from the first thermal management component 30.

[0106] In the embodiment where there is one second thermal management component 40, the receiving portion 401 is thermally connected to the first thermal management component 30 through the thermal conductive member 50. In the embodiment where there are multiple second thermal management components 40, one thermal conductive member 50 may be provided for each receiving portion 401, and each receiving portion 401 is thermally connected to the first thermal management component 30 through one thermal conductive member 50; or the thermal conductive member 50 may connect multiple receiving portions 401, so that multiple receiving portions 401 are thermally connected through one thermal conductive member 50, and multiple receiving portions 401 are thermally connected to the first thermal management component 30 through the thermal conductive member 50.

[0107] The heat conductor 50 may be in contact with the first thermal management component 30, and the heat conductor 50 may be able to directly exchange heat with the first thermal management component 30 to achieve a thermal connection between the heat conductor 50 and the first thermal management component 30; or the heat conductor 50 may be connected to the first thermal management component 30 via an intermediate component, and the heat conductor 50 and the first thermal management component 30 may exchange heat via the intermediate component to achieve a thermal connection between the heat conductor 50 and the first thermal management component 30, and the intermediate component may be a thermal conductive adhesive.

[0108] The thermal conductivity of the heat conducting member 50 is greater than that of the receiving portion 401, so that the heat conducting member 50 can conduct heat faster than the receiving portion 401. The heat conduction capacity of the heat conducting member 50 and the first heat management component 30 is greater than that of the receiving portion 401 and the first heat management component 30.

[0109] In the embodiment of the present application, a fluid medium flows into or out of the flow channel 301 of the first thermal management component 30, and the fluid medium can exchange heat with the first thermal management component 30, and the first thermal management component 30 can exchange heat with the battery cell 10, so that the first thermal management component 30 manages the temperature of the battery cell 10. The second thermal management component 40 and the battery cell 10 are arranged relative to each other along the second direction X, and the first thermal management component 30 and the battery cell 10 are arranged relative to each other along the first direction Z, so that the temperature of the battery cell 10 is jointly managed by the first thermal management component 30 and the second thermal management component 40 in multiple directions, thereby improving the temperature management effect of the battery cell 10. The phase change material 402 is accommodated in the accommodation portion 401, and the phase change material 402 can exchange heat with the battery cell 10, so that a phase change occurs in the accommodation cavity 4011. The thermal conductivity of the heat conducting member 50 is greater than that of the receiving portion 401, and the heat conducting member 50 blocks the opening 40111 and is thermally connected to the first thermal management component 30. The heat conducting member 50 can quickly transfer the heat in the receiving cavity 4011 to the first thermal management component 30, or quickly transfer the heat of the first thermal management component 30 to the receiving cavity 4011, thereby improving the heat exchange efficiency between the second thermal management component 40 and the first thermal management component 30, thereby improving the ability of the second thermal management component 40 to manage the temperature of the battery cell 10, so that the battery cell 10 can be in a relatively stable temperature environment, reducing the risk of the battery cell 10 being too low or too high in temperature, thereby reducing the risk of thermal runaway of the battery cell 10 and improving the reliability of the battery device 100.

[0110] In some embodiments, please refer to Figure 4 and Figure 5The battery device 100 includes a plurality of second thermal management components 40 , which are arranged at intervals along the second direction X, a battery cell 10 is arranged between two adjacent second thermal management components 40 , and a thermal conductive member 50 connects at least two receiving portions 401 and blocks openings 40111 of receiving cavities 4011 of at least two receiving portions 401 .

[0111] There are multiple second thermal management components 40 and multiple battery cells 10. Only one battery cell 10 may be arranged between two adjacent second thermal management components 40; or multiple battery cells 10 may be arranged between two adjacent second thermal management components 40. The multiple battery cells 10 may be arranged along the second direction X, or along the third direction Y, or in rows and columns in a plane perpendicular to the first direction Z, with each row of battery cells 10 arranged along the second direction X, and each column of battery cells 10 arranged along the third direction Y, and the first direction Z, the second direction X and the third direction Y being perpendicular to each other.

[0112] The heat conductive member 50 is connected to the receiving portion 401 to block the opening 40111 of the receiving cavity 4011 of the receiving portion 401. The heat conductive member 50 may be connected to only two receiving portions 401, and the two second thermal management components 40 are thermally connected through the heat conductive member 50; or the heat conductive member 50 may be connected to more than three receiving portions 401, and the more than three receiving portions 401 are thermally connected through the heat conductive member 50.

[0113] In this embodiment, by arranging the battery cell 10 between two adjacent second thermal management components 40, the second thermal management components 40 on both sides of the battery cell 10 along the second direction X can exchange heat with the battery cell 10, thereby improving the heat absorption or heat dissipation efficiency of the battery cell 10. The heat conductive member 50 connects at least two receiving portions 401 to facilitate heat exchange between the two second thermal management components 40, thereby reducing the temperature difference between the second thermal management components 40 and improving the overall temperature control effect of the plurality of second thermal management components 40 on the battery cell 10. For example, when the temperature of an individual battery cell 10 of the battery device 100 rises, the second thermal management components 40 on both sides of the battery cell 10 along the second direction X close to the battery cell 10 can absorb the heat of the battery cell 10, and these second thermal management components 40 can transfer the temperature to other second thermal management components 40 through the heat conductive member 50, and the phase change material 402 of other second thermal management components 40 can absorb the heat of the phase change material 402 of these second thermal management components 40, thereby improving the ability of the second thermal management component 40 to absorb the heat of the battery cell 10.

[0114] In some embodiments, please refer to Figure 4 and Figure 5The heat conducting member 50 is connected to the same end of at least two receiving portions 401 along the third direction Y, and the first direction Z and the second direction X are both perpendicular to the third direction Y.

[0115] The receiving portion 401 has two opposite ends along the third direction Y. The receiving portion 401 may be connected to only one heat conducting member 50, and the heat conducting member 50 is connected to the same end of the plurality of receiving portions 401 along the third direction Y; or the receiving portion 401 may be connected to two heat conducting members 50, and the two heat conducting members 50 are located at the two ends of the plurality of receiving portions 401 along the third direction Y, and each heat conducting member 50 is connected to the same end of the plurality of receiving portions 401 along the third direction Y.

[0116] The heat conducting member 50 may be connected to the same end of only two receiving portions 401 along the third direction Y; or the heat conducting member 50 may be connected to the same end of more than three receiving portions 401 along the third direction Y.

[0117] In this embodiment, by connecting the heat conductive member 50 to the same end of at least two receiving portions 401 along the third direction Y, the paths for connecting the heat conductive member 50 to the multiple receiving portions 401 can be reduced, the use of the material of the heat conductive member 50 can be reduced, and the material cost of the heat conductive member 50 can be saved. The heat conductive member 50 is connected to the end of the receiving portion 401, which can reduce the influence of the heat conductive member 50 on the battery cell 10, reduce the risk of the heat conductive member 50 contacting the battery cell 10 and causing the battery cell 10 to short-circuit or temperature imbalance, and improve the reliability of the battery device 100.

[0118] In some embodiments, please refer to Figure 4 and Figure 5 Along the second direction X, two adjacent receiving portions 401 are connected via a heat conducting member 50 .

[0119] In the embodiment where there are two receiving parts 401, the two receiving parts 401 are connected by one heat conductive member 50. In the embodiment where there are three or more receiving parts 401, every two adjacent receiving parts 401 are connected by one heat conductive member 50, and three adjacent receiving parts 401 are connected by two heat conductive members 50. The two heat conductive members 50 may be located at the same end of the three receiving parts 401 along the third direction Y, or at both ends of the three receiving parts 401 along the third direction Y.

[0120] In this embodiment, the path of the heat conductor 50 connecting the two receiving portions 401 is shorter. On the one hand, the material usage of the heat conductor 50 is saved and the cost is reduced. On the other hand, the shorter path can reduce the heat loss of the heat conductor 50, improve the heat conduction efficiency of the heat conductor 50 between the receiving portions 401 and the receiving portions 401 and between the receiving portions 401 and the first thermal management component 30, and enhance the temperature control effect of the second thermal management component 40 on the battery cell 10.

[0121] In some embodiments, please refer to Figure 4-Figure 6 The three adjacent receiving portions 401 are connected by two heat conducting members 50 , and the two heat conducting members 50 are respectively connected to the two ends of the receiving portion 401 located in the middle position among the three adjacent receiving portions 401 along the third direction Y, and the first direction Z and the second direction X are both perpendicular to the third direction Y.

[0122] The three receiving portions 401 are connected via two heat conducting members 50 . Each heat conducting member 50 connects two adjacent receiving portions 401 along the second direction X. The two heat conducting members 50 are located at two sides of the three receiving portions 401 along the third direction Y, respectively.

[0123] In this embodiment, multiple receiving portions 401 are connected in series through multiple heat conductive members 50, thereby realizing the connection of multiple receiving portions 401, so that the multiple receiving portions 401 can exchange heat through the multiple heat conductive members 50, so that the temperature in the receiving cavity 4011 of the multiple receiving portions 401 is more uniform, and when the temperature in some receiving cavities 4011 is unbalanced, the remaining receiving cavities 4011 can exchange heat with the receiving cavities 4011 with unbalanced temperature, thereby reducing the risk of failure of the second thermal management component 40 in managing the temperature of the battery cell 10.

[0124] In some embodiments, please refer to Figure 4-Figure 6 The cross section of the heat conducting member 50 perpendicular to the first direction Z is arc-shaped.

[0125] Along the second direction X, the heat conductive member 50 has two opposite ends, and the two ends of the heat conductive member 50 are respectively connected to the two receiving portions 401. Along the third direction Y, the middle of the heat conductive member 50 is farther away from the battery cell 10 than the two ends of the heat conductive member 50 to reduce the risk of the heat conductive member 50 contacting the battery cell 10.

[0126] In this embodiment, when the positions of two adjacent receiving portions 401 along the second direction X change, the heat conductive member 50 can adapt to the position change of the receiving portion 401 by deformation, thereby reducing the risk of damage to the heat conductive member 50 and improving the connection stability and position stability of the heat conductive member 50 and the receiving portion 401.

[0127] In some embodiments, please refer to Figure 4-Figure 6 A plurality of battery cells 10 arranged along a third direction Y are disposed between two adjacent receiving portions 401 , and the first direction Z and the second direction X are both perpendicular to the third direction Y.

[0128] The plurality of battery cells 10 are arranged along the third direction Y, and the plurality of battery cells 10 are provided with receiving portions 401 on both sides along the second direction X, so that each battery cell 10 is provided with receiving portions 401 on both sides along the second direction X to manage the temperature of the battery cells 10 .

[0129] In this embodiment, two adjacent receiving portions 401 can manage the temperatures of a plurality of battery cells 10 at the same time, thereby improving the efficiency of the second heat management component 40 in managing the temperatures of the battery cells 10 .

[0130] In some embodiments, please refer to Figure 7-Figure 9 , Figure 7 A partial structural schematic diagram of a battery device 100 provided in some embodiments of the present application; Figure 8 for Figure 7 BB cross-sectional view; Fig. 9 for Figure 8 A partial enlarged view of area A. A portion of the heat conducting member 50 extends into the receiving cavity 4011 .

[0131] The portion of the heat conductive member 50 located in the receiving cavity 4011 may be in contact with the inner wall of the receiving cavity 4011 to improve the connection strength between the heat conductive member 50 and the receiving portion 401. The portion of the heat conductive member 50 located in the receiving cavity 4011 may be in contact with the phase change material 402 to improve the heat exchange efficiency between the phase change material 402 and the first thermal management component 30.

[0132] In the embodiment where the heat conducting member 50 is connected to the plurality of receiving portions 401 , a portion of the heat conducting member 50 extending into the interior of the receiving cavity 4011 can improve the heat exchange efficiency of the plurality of second heat management components 40 .

[0133] In this embodiment, by arranging a portion of the heat conductive member 50 to extend into the receiving cavity 4011 , heat exchange between the heat conductive member 50 and the receiving cavity 4011 can be promoted, thereby improving the heat exchange efficiency between the second heat management component 40 and the first heat management component 30 .

[0134] In some embodiments, please refer to Figure 7-Figure 9 The portion of the heat conducting member 50 extending into the receiving cavity 4011 is in contact with the phase change material 402 .

[0135] The phase change material 402 can be a solid phase change material 402, and the heat conductor 50 is against the solid phase change material 402; the phase change material 402 can also be a liquid phase change material 402, and a part of the heat conductor 50 is inserted into the liquid phase change material 402; the phase change material 402 can also be a gaseous phase change material 402, and a part of the heat conductor 50 is inserted into the receiving cavity 4011 containing the gaseous phase change material 402, so as to achieve that the part of the heat conductor 50 extending into the receiving cavity 4011 is in contact with the phase change material 402.

[0136] In this embodiment, the phase change material 402 in the receiving cavity 4011 can directly exchange heat with the heat conductive element 50 , thereby improving the heat exchange efficiency between the phase change material 402 and the first thermal management component 30 , and further improving the heat exchange efficiency between the second thermal management component 40 and the first thermal management component 30 .

[0137] In some embodiments, the thermal conductivity of the thermal conductor 50 is greater than or equal to 100 W / (m·K).

[0138] W / (m·K) is watt per meter per Kelvin.

[0139] The thermal conductivity of the heat conducting member 50 may be 100 W / (m·K), 110 W / (m·K), 120 W / (m·K), 130 W / (m·K), 140 W / (m·K), 150 W / (m·K), 160 W / (m·K), 170 W / (m·K), 180 W / (m·K), 190 W / (m·K), 200 W / (m·K), 210 W / (m·K), 220 W / (m·K), 230 W / (m·K), 240 W / (m·K), 250 W / (m·K), (m·K), 260W / (m·K), 270W / (m·K), 280W / (m·K), 290W / (m·K), 300W / (m·K), 310W / (m·K), 320W / (m·K), 330W / (m· K), 340W / (m·K), 350W / (m·K), 360W / (m·K), 370W / (m·K), 380W / (m·K), 390W / (m·K), 400W / (m·K), 500W / (m·K), etc.

[0140] In this embodiment, the heat conducting member 50 has a strong thermal conductivity and can conduct the heat in the receiving cavity 4011 to the first thermal management component 30 or conduct the heat of the first thermal management component 30 to the receiving cavity 4011, thereby improving the heat exchange efficiency between the second thermal management component 40 and the first thermal management component 30.

[0141] In some embodiments, the heat conducting element 50 is made of copper, aluminum, silver or graphite.

[0142] The thermal conductivity of copper is approximately 400 W / (m·K), the thermal conductivity of aluminum is approximately 235 W / (m·K), the thermal conductivity of silver is approximately 429 W / (m·K), and the thermal conductivity of graphite is approximately 150 W / (m·K)-400 W / (m·K). In this way, the thermal conductor 50 can have a higher thermal conductivity.

[0143] In this embodiment, it is easy to obtain the material of the heat conducting member 50 , which also reduces the cost of the heat conducting member 50 .

[0144] In some embodiments, please refer to Fig.10 and Fig.11 , Fig.10 for Figure 7 CC section view; Fig.11 for Fig.10A partial enlarged view of area C. The heat conducting member 50 is a heat conducting plate, and the thickness of the heat conducting plate is 0.5 mm-2 mm.

[0145] The thickness of the heat conducting plate is H, and H can be any one of 0.5mm, 0.56mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, 1.9mm, 1.95mm, and 2mm, or any value between any two of them.

[0146] In this embodiment, when the thickness of the heat conducting plate is greater than or equal to 0.5 mm, the heat conducting ability of the heat conducting member 50 can be improved, thereby promoting the heat exchange efficiency of the first thermal management component 30 and the second thermal management component 40; when the thickness of the heat conducting plate is less than or equal to 2 mm, the size of the heat conducting member 50 can be reduced, saving the cost of the heat conducting member 50, and also reducing the space occupied by the heat conducting member 50 in the box 20, so that the box 20 can have a larger space to accommodate the battery cell 10, thereby improving the volume energy density of the battery device 100. Therefore, when the thickness of the heat conducting member 50 is 0.5 mm-2 mm, the heat conducting ability of the heat conducting member 50 and the cost saving of the heat conducting member 50 can be taken into account, and the heat exchange efficiency of the first thermal management component 30 and the second thermal management component 40 and the volume energy density of the battery device 100 can be taken into account.

[0147] In some embodiments, please refer to Figure 12-14 , Fig.12 A partial structural schematic diagram of a battery device 100 provided in some embodiments of the present application; Fig.13 for Fig.12 DD cross-sectional view; Fig.14 for Fig.13 The battery device 100 further includes a first thermally conductive adhesive layer 60 . Along the first direction Z, at least a portion of the first thermally conductive adhesive layer 60 is located between the thermally conductive element 50 and the first thermal management component 30 , and connects the thermally conductive element 50 and the first thermal management component 30 .

[0148] Only a portion of the first thermally conductive adhesive layer 60 may be located between the thermally conductive element 50 and the first thermal management component 30, or the entire first thermally conductive adhesive layer 60 may be located between the thermally conductive element 50 and the first thermal management component 30. In the embodiment where there are multiple thermally conductive elements 50, a first thermally conductive adhesive layer 60 is disposed between each thermally conductive element 50 and the first thermal management component 30.

[0149] In this embodiment, by setting the first thermally conductive adhesive layer 60, on the one hand, the first thermally conductive adhesive layer 60 can improve the heat exchange efficiency between the thermally conductive component 50 and the first thermal management component 30; on the other hand, the first thermally conductive adhesive layer 60 can fix the positions of the thermally conductive component 50 and the first thermal management component 30, thereby improving the structural stability of the thermally conductive component 50 and the first thermal management component 30.

[0150] In some embodiments, please continue to refer to 12- Fig.14 The heat conducting member 50 is riveted to the first heat management component 30 .

[0151] The heat conducting member 50 may be provided with a riveting portion 501, the first thermal management component 30 may be provided with a mounting hole, the riveting portion 501 may be inserted into the mounting hole and riveted to cooperate with the first thermal management component 30 to achieve riveting of the heat conducting member 50 and the first thermal management component 30; or the first thermal management component 30 may be provided with a riveting portion 501, the heat conducting member 50 may be provided with a mounting hole, the riveting portion 501 may be inserted into the mounting hole and riveted to cooperate with the heat conducting member 50 to achieve riveting of the heat conducting member 50 and the first thermal management component 30.

[0152] In this embodiment, by riveting the heat conductor 50 and the first thermal management component 30, the connection between the heat conductor 50 and the first thermal management component 30 is more stable, and the riveted position of the heat conductor 50 and the first thermal management component 30 further promotes the heat exchange between the heat conductor 50 and the first thermal management component 30, thereby improving the heat exchange efficiency between the heat conductor 50 and the first thermal management component 30.

[0153] In some embodiments, please continue to refer to 12- Fig.14 The battery device 100 further includes a first thermally conductive adhesive layer 60. Along the first direction Z, at least a portion of the first thermally conductive adhesive layer 60 is located between the thermally conductive member 50 and the first thermal management component 30, and connects the thermally conductive member 50 and the first thermal management component 30. A riveting portion 501 is provided at one end of the thermally conductive member 50 facing the first thermal management component 30. The riveting portion 501 passes through the first thermally conductive adhesive layer 60 and is riveted to the first thermal management component 30.

[0154] A rivet 501 is provided at one end of the heat conducting member 50 facing the first heat management component 30. The heat conducting member 50 and the rivet 501 may be separately provided and connected, or they may be integrally formed. In the embodiment where the first heat management component 30 has a flow channel 301, the rivet 501 and the flow channel 301 may be spaced apart, or a portion of the rivet 501 may extend into the flow channel 301, and the rivet 501 and the flow channel 301 are sealed by a sealing member, wherein the sealing member may be a sealant.

[0155] The first heat management component 30 is provided with a hole 302 for passing the rivet portion 501 . The rivet portion 501 is inserted into the hole 302 and riveted to the first heat management component 30 to achieve riveting of the heat conducting member 50 and the first heat management component 30 .

[0156] In this embodiment, the heat conducting member 50 and the first thermal management component 30 are connected by the first thermal conductive adhesive layer 60 and riveted by the rivet portion 501, so as to realize the dual fixation of the heat conducting member 50 and the first thermal management component 30, and improve the connection stability of the heat conducting member 50 and the first thermal management component 30. In addition, both the first thermal conductive adhesive layer 60 and the rivet portion 501 can improve the heat exchange efficiency between the heat conducting member 50 and the first thermal management component 30.

[0157] In some embodiments, in a projection plane perpendicular to the first direction Z, at least a portion of the orthographic projection of the heat conductor 50 overlaps with a portion of the orthographic projection of the flow channel 301 .

[0158] The entire orthographic projection of the heat conductor 50 may overlap with a portion of the orthographic projection of the flow channel 301 ; or a portion of the orthographic projection of the heat conductor 50 may overlap with a portion of the orthographic projection of the flow channel 301 .

[0159] In this embodiment, the fluid medium in the flow channel 301 flows over the heat conducting member 50 , thereby promoting heat exchange between the heat conducting member 50 and the first thermal management component 30 , and improving the heat exchange efficiency between the second thermal management component 40 and the first thermal management component 30 .

[0160] In some embodiments, please refer to Fig.12 , Fig.15 and Fig.16 , Fig.15 for Fig.12 EE cross-sectional view; Fig.16 for Fig.15 The battery device 100 further includes a second thermally conductive adhesive layer 70 . Along the second direction X, at least a portion of the second thermally conductive adhesive layer 70 is located between the battery cell 10 and the receiving portion 401 , and connects the battery cell 10 and the receiving portion 401 .

[0161] Only a portion of the second thermally conductive adhesive layer 70 may be located between the battery cell 10 and the receiving portion 401; or the entire second thermally conductive adhesive layer 70 may be located between the battery cell 10 and the receiving portion 401. The second thermally conductive adhesive layer 70 may be disposed between each battery cell 10 and the receiving portion 401 adjacent thereto; or the second thermally conductive adhesive layer 70 may be disposed between some battery cells 10 and the receiving portion 401 adjacent thereto.

[0162] In this embodiment, on the one hand, the receiving portion 401 and the battery cell 10 can perform heat exchange through the second thermally conductive adhesive layer 70, thereby improving the heat exchange efficiency between the battery cell 10 and the receiving portion 401; on the other hand, the second thermally conductive adhesive layer 70 makes the position of the battery cell 10 and the receiving portion 401 in the box body 20 more stable, thereby improving the position stability of the battery cell 10 and the receiving portion 401.

[0163] In some embodiments, please refer to Fig.15 and Fig.16 Along the second direction X, the battery cell 10 has a first surface 4 facing the receiving portion 401 , and the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is 60%-100%.

[0164] The ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 may be 60%, 62%, 65%, 68%, 70%, 72%, 75%, 78%, 80%, 82%, 85%, 88%, 90%, 92%, 95%, 98%, or 100%. When the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is 100%, along the second direction X, the receiving portion 401 completely covers the first surface 4, which may be that the receiving portion 401 and the first surface 4 completely overlap along the second direction X; or the area of ​​the receiving portion 401 along the second direction X may be greater than the area of ​​the first surface 4.

[0165] In this embodiment, when the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is greater than or equal to 60%, the heat exchange efficiency between the receiving portion 401 and the battery cell 10 can be improved, and the temperature management effect of the second thermal management component 40 on the battery cell 10 can be improved; when the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is less than or equal to 100%, the material usage of the receiving portion 401 can be reduced, and the manufacturing cost of the receiving portion 401 can be reduced; therefore, when the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is 60%-90%, it is possible to take into account both improving the heat exchange efficiency between the receiving portion 401 and the battery cell 10 and improving the manufacturing cost of the receiving portion 401.

[0166] In some embodiments, the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is 70%-90%.

[0167] The ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 can be any one of 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90% or any point value between any two of them.

[0168] In this embodiment, when the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is greater than or equal to 70%, the heat exchange efficiency between the receiving portion 401 and the battery cell 10 can be further improved, and the temperature management effect of the second thermal management component 40 on the battery cell 10 can be improved; when the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is less than or equal to 90%, the material usage of the receiving portion 401 can be further reduced, and the manufacturing cost of the receiving portion 401 can be reduced; therefore, when the ratio of the contact area between the first surface 4 and the receiving portion 401 to the area of ​​the first surface 4 is 70%-90%, it is possible to further take into account both improving the heat exchange efficiency between the receiving portion 401 and the battery cell 10 and improving the manufacturing cost of the receiving portion 401.

[0169] In some embodiments, along the second direction X, the battery cell 10 has a first surface 4 facing the receiving portion 401 , and the first surface 4 is the surface with the largest outer surface area of ​​the battery cell 10 .

[0170] The first surface 4 is a large surface of the battery cell 10. In the embodiment where there are multiple battery cells 10, the large surface of each battery cell 10 is arranged along the second direction X facing the receiving portion 401.

[0171] In this embodiment, the second thermal management component 40 is arranged opposite to the first surface 4 of the battery cell 10. The second thermal management component 40 can exchange heat with the battery cell 10 through the wall portion where the first surface 4 is located, thereby improving the temperature management effect of the second thermal management component 40 on the battery cell 10.

[0172] In some embodiments, the receiving portion 401 is made of insulating material.

[0173] The receiving portion 401 is made of an insulating material so that the receiving portion 401 can be insulated from the battery cell 10 and the first thermal management component 30 .

[0174] In this embodiment, by setting the receiving portion 401 to an insulating material, the risk of insulation failure between the battery cell 10 and the second thermal management component 40 can be reduced. The receiving portion 401 can also separate the battery cell 10 and the box wall of the box body 20 along the second direction X, thereby reducing the risk of short circuit due to contact between the battery cell 10 and the box body 20.

[0175] In some embodiments, the material of the receiving portion 401 is fluororubber, polyimide, silicone, epoxy resin or polytetrafluoroethylene.

[0176] In some embodiments, the phase change temperature of the phase change material 402 is 25°C-45°C.

[0177] The phase change temperature of the phase change material 402 can be any point value of 25°C, 26°C, 27°C, 28°C, 29°C, 30°C, 31°C, 32°C, 33°C, 34°C, 35°C, 36°C, 37°C, 38°C, 39°C, 40°C, 41°C, 42°C, 43°C, 44°C, 45°C or a range value between any two of them.

[0178] In this embodiment, by using a phase change material 402 with a phase change temperature between 25°C-45°C, the temperature of the second thermal management component 40 is more easily stabilized at 25°C-45°C, so that the temperature of the battery cell 10 is more easily controlled between 25℃-45℃, thereby improving the performance of the battery cell 10.

[0179] In some embodiments, the phase change material 402 is potassium aluminum sulfate dodecahydrate, ammonium aluminum sulfate dodecahydrate, n-octadecane, n-eicosane, sodium sulfate decahydrate, or lauric acid.

[0180] In some embodiments, the battery device 100 includes a plurality of battery cells 10 , and the first thermal management component 30 is disposed on only one side of the plurality of battery cells 10 along the first direction Z. In this embodiment, the difficulty of disposing the first thermal management component 30 is reduced.

[0181] In some embodiments, the first thermal management component 30 is located at the bottom of the plurality of battery cells 10, and the first thermal management component 30 is configured to support the plurality of battery cells 10. In this embodiment, the contact between the battery cells 10 and the first thermal management component 30 can be closer, thereby improving the heat conduction effect between the battery cells 10 and the first thermal management component 30.

[0182] An embodiment of the present application provides an electrical device, including a battery cell 10 provided by any one of the above embodiments or a battery device 100 provided by any one of the above embodiments, wherein the battery cell 10 is used to provide electrical energy to the electrical device.

[0183] Please continue to refer to Figure 12-16The embodiment of the present application provides a battery device 100, including a housing 20, a battery cell 10, a first thermal management component 30, a second thermal management component 40, a heat conducting member 50, a first thermal conductive adhesive layer 60 and a second thermal conductive adhesive layer 70. The battery cell 10 is accommodated in the housing 20. The first thermal management component 30 is accommodated in the housing 20 and is arranged opposite to the battery cell 10 along a first direction Z. The first thermal management component 30 is provided with a flow channel 301, and the flow channel 301 is used to flow in or out of a fluid medium to manage the temperature of the battery cell 10. The second thermal management component 40 is accommodated in the housing 20 and is arranged opposite to the battery cell 10 along a second direction X. The second thermal management component 40 is configured to manage the temperature of the battery cell 10. The second thermal management component 40 includes a receiving portion 401 and a phase change material 402. The receiving portion 401 has a receiving cavity 4011. The phase change material 402 is accommodated in the receiving cavity 4011. The receiving cavity 4011 has an opening 40111. The heat conductive member 50 is made of insulating material, and is connected to the first thermal management component 30 by heat conduction, and blocks the opening 40111. The thermal conductivity of the heat conductive member 50 is greater than the thermal conductivity of the receiving portion 401, and the thermal conductivity of the heat conductive member 50 is greater than 100W / (m·K). At least a portion of the first thermal conductive adhesive layer 60 is located between the heat conductive member 50 and the first thermal management component 30, and connects the heat conductive member 50 and the first thermal management component 30. The end of the heat conductive member 50 facing the first thermal management component 30 is provided with a riveted portion 501, and the riveted portion 501 passes through the first thermal conductive adhesive layer 60 and is riveted to the first thermal management component 30. Along the second direction X, at least a portion of the second thermal conductive adhesive layer 70 is located between the battery cell 10 and the receiving portion 401, and connects the battery cell 10 and the receiving portion 401. There are multiple second thermal management components 40, which are arranged at intervals along the second direction X, and a battery cell 10 is arranged between two adjacent second thermal management components 40. The heat conductive member 50 connects at least two receiving portions 401 and blocks the openings 40111 of the receiving cavities 4011 of at least two receiving portions 401. The three adjacent receiving portions 401 are connected by two heat conductive members 50, and the two heat conductive members 50 are respectively connected to the two ends of the receiving portion 401 located in the middle position among the three adjacent receiving portions 401 along the third direction Y. The first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0184] In this embodiment, a fluid medium flows into or out of the flow channel 301 of the first thermal management component 30, and the fluid medium can exchange heat with the first thermal management component 30, and the first thermal management component 30 can exchange heat with the battery cell 10, so that the first thermal management component 30 manages the temperature of the battery cell 10. The second thermal management component 40 and the battery cell 10 are arranged relative to each other along the second direction X, and the first thermal management component 30 and the battery cell 10 are arranged relative to each other along the first direction Z, so that the temperature of the battery cell 10 is jointly managed by the first thermal management component 30 and the second thermal management component 40 in multiple directions, thereby improving the temperature management effect of the battery cell 10. The phase change material 402 is accommodated in the accommodation portion 401, and the phase change material 402 can exchange heat with the battery cell 10, so that a phase change occurs in the accommodation cavity 4011. The thermal conductivity of the heat conducting member 50 is greater than that of the receiving portion 401, and the heat conducting member 50 blocks the opening 40111 and is thermally connected to the first thermal management component 30. The heat conducting member 50 can quickly transfer the heat in the receiving cavity 4011 to the first thermal management component 30, or quickly transfer the heat of the first thermal management component 30 to the receiving cavity 4011, thereby improving the heat exchange efficiency between the second thermal management component 40 and the first thermal management component 30, thereby improving the effect of the second thermal management component 40 in managing the temperature of the battery cell 10, so that the battery cell 10 can be in a relatively stable temperature environment, reducing the risk of the battery cell 10 being too low or too high, thereby reducing the risk of thermal runaway of the battery cell 10, and improving the reliability of the battery device 100. The second thermal management components 40 on both sides of the battery cell 10 along the second direction X can perform heat exchange with the battery cell 10, thereby improving the heat absorption or heat dissipation efficiency of the battery cell 10. The heat conducting member 50 connects at least two receiving parts 401 so as to facilitate heat exchange between the two second thermal management components 40, which can reduce the temperature difference between the second thermal management components 40 and improve the temperature control effect of the plurality of second thermal management components 40 on the battery cell 10. The plurality of receiving parts 401 are connected in series through the plurality of heat conducting members 50, so as to realize the connection of the plurality of receiving parts 401, so that the plurality of receiving parts 401 can exchange heat through the plurality of heat conducting members 50, so that the temperature in the receiving cavity 4011 of the plurality of receiving parts 401 is more uniform. When the temperature in some receiving cavities 4011 is unbalanced, the remaining receiving cavities 4011 can exchange heat with the receiving cavities 4011 with unbalanced temperature, so as to reduce the risk of failure of the second thermal management component 40 to manage the temperature of the battery cell 10. The heat conducting member 50 and the first thermal management component 30 are connected through the first thermal conductive adhesive layer 60, and are riveted through the riveting part 501, so as to realize the dual fixation of the heat conducting member 50 and the first thermal management component 30, and improve the connection stability of the heat conducting member 50 and the first thermal management component 30. Furthermore, both the first thermally conductive adhesive layer 60 and the riveted portion 501 can improve the heat exchange efficiency between the thermally conductive element 50 and the first thermal management component 30 .By providing the second thermally conductive adhesive layer 70 , on the one hand, the receiving portion 401 and the battery cell 10 can perform heat exchange through the second thermally conductive adhesive layer 70 , thereby improving the heat exchange efficiency between the battery cell 10 and the receiving portion 401 ; on the other hand, the second thermally conductive adhesive layer 70 makes the position of the battery cell 10 and the receiving portion 401 more stable in the box body 20 , thereby improving the position stability of the battery cell 10 and the receiving portion 401 .

[0185] 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.

[0186] 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: Box; A battery cell is contained in the box; A first thermal management component is contained in the box and arranged opposite to the battery cell along a first direction, wherein the first thermal management component is provided with a flow channel, and the flow channel is used for the flow of a fluid medium to manage the temperature of the battery cell; a second thermal management component, contained in the box and disposed opposite to the battery cell along a second direction, the second thermal management component being configured to manage the temperature of the battery cell, the second thermal management component comprising a receiving portion and a phase change material, the receiving portion having a receiving cavity, the phase change material being received in the receiving cavity, the receiving cavity having an opening, and the second direction being perpendicular to the first direction; A heat conducting member is thermally connected to the first heat management component and blocks the opening, and a thermal conductivity coefficient of the heat conducting member is greater than a thermal conductivity coefficient of the receiving portion.

2. The battery device according to claim 1, characterized in that The battery device includes a plurality of the second thermal management components, which are arranged at intervals along the second direction, and the battery cell is arranged between two adjacent second thermal management components. The heat conductive member connects at least two of the receiving portions and blocks the openings of the receiving cavities of at least two of the receiving portions.

3. The battery device according to claim 2, characterized in that: The heat conducting member is connected to the same end of at least two of the receiving portions along a third direction, and the first direction and the second direction are both perpendicular to the third direction.

4. The battery device according to claim 2, characterized in that: Along the second direction, two adjacent receiving portions are connected via one heat conducting member.

5. The battery device according to claim 4, characterized in that: The three adjacent receiving portions are connected via the two heat conducting members, and the two heat conducting members are respectively connected to two ends of the receiving portion located in the middle of the three adjacent receiving portions along the third direction, and the first direction and the second direction are both perpendicular to the third direction.

6. The battery device according to claim 4, characterized in that: The cross section of the heat conducting member perpendicular to the first direction is arc-shaped.

7. The battery device according to claim 2, characterized in that: A plurality of battery cells arranged along a third direction are disposed between two adjacent receiving portions, and both the first direction and the second direction are perpendicular to the third direction.

8. The battery device according to any one of claims 1 to 7, characterized in that: A portion of the heat conducting member extends into the receiving cavity.

9. The battery device according to claim 8, characterized in that: The portion of the heat conducting member extending into the receiving cavity contacts the phase change material.

10. The battery device according to any one of claims 1 to 7, characterized in that: The thermal conductivity of the thermal conductor is greater than or equal to 100 W / (m·K).

11. The battery device according to claim 10, characterized in that: The heat conducting member is made of copper, aluminum, silver or graphite.

12. The battery device according to any one of claims 1 to 7, characterized in that: The heat conducting member is a heat conducting plate, and the thickness of the heat conducting plate is 0.5 mm-2 mm.

13. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further includes a first thermally conductive adhesive layer. Along the first direction, at least a portion of the first thermally conductive adhesive layer is located between the thermally conductive element and the first thermal management component, and connects the thermally conductive element and the first thermal management component.

14. The battery device according to any one of claims 1 to 7, characterized in that: The heat conducting member is riveted to the first heat management component.

15. The battery device according to claim 14, characterized in that: The battery device also includes a first thermally conductive adhesive layer. Along the first direction, at least a portion of the first thermally conductive adhesive layer is located between the thermally conductive member and the first thermal management component, and connects the thermally conductive member and the first thermal management component. A rivet portion is provided at one end of the thermally conductive member facing the first thermal management component, and the rivet portion passes through the first thermally conductive adhesive layer and is riveted to the first thermal management component.

16. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further includes a second thermally conductive adhesive layer. Along the second direction, at least a portion of the second thermally conductive adhesive layer is located between the battery cell and the receiving portion, and connects the battery cell and the receiving portion.

17. The battery device according to any one of claims 1 to 7, characterized in that: Along the second direction, the battery cell has a first surface facing the receiving portion, and a ratio of a contact area between the first surface and the receiving portion to an area of ​​the first surface is 60%-100%.

18. The battery device according to claim 17, characterized in that: The ratio of the contact area between the first surface and the receiving portion to the area of ​​the first surface is 70%-90%.

19. The battery device according to any one of claims 1 to 7, characterized in that: Along the second direction, the battery cell has a first surface facing the receiving portion, and the first surface is a surface with the largest outer surface area of ​​the battery cell.

20. The battery device according to any one of claims 1 to 7, characterized in that: The receiving portion is made of insulating material.

21. The battery device according to claim 20, characterized in that The material of the receiving portion is fluororubber, polyimide, silicone, epoxy resin or polytetrafluoroethylene.

22. The battery device according to any one of claims 1 to 7, characterized in that: The phase change temperature of the phase change material is 25°C-45°C.

23. The battery device according to any one of claims 1 to 7, characterized in that: The phase change material is potassium aluminum sulfate dodecahydrate, ammonium aluminum sulfate dodecahydrate, n-octadecane, n-eicosane, sodium sulfate decahydrate or lauric acid.

24. The battery device according to any one of claims 1 to 7, characterized in that: The battery device includes a plurality of battery cells, and the first thermal management component is disposed on only one side of the plurality of battery cells along the first direction.

25. The battery device according to claim 24, characterized in that The first thermal management component is located at the bottom of the plurality of battery cells, and the first thermal management component is configured to support the plurality of battery cells.

26. An electrical device, characterized in that: Comprising a battery device as described in any one of claims 1-25.

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