Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, the battery device comprises a plurality of battery assemblies and a thermal management assembly, the plurality of battery assemblies are arranged along a first direction, each battery assembly comprises a battery monomer and first walls arranged in pairs, the first walls arranged in pairs are distributed at intervals along a second direction, and the thermal management assembly is arranged between the battery monomers and the first walls. A space between the first walls arranged in pairs forms an accommodating cavity, and the battery monomers are arranged in the accommodating cavity. The heat management assembly comprises heat exchange pieces and connecting pieces, the heat exchange pieces are arranged between every two adjacent battery assemblies in the first direction, the heat exchange pieces are configured to conduct heat exchange with the single batteries, the connecting pieces are connected to at least one side, in the second direction, of each heat exchange piece, the connecting pieces are connected with the first wall, and the first direction intersects with the second direction. The reliability of the battery device is improved while the cost of the battery device is reduced.

Description

Technical Field

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

[0002] With the development of new energy technologies, battery devices are being used more and more widely, for example in mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools.

[0003] In the development of battery technology, how to strike a balance between the cost and reliability of battery devices is a technical problem that needs to be solved urgently. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which are beneficial for reducing the cost of the battery device while improving the reliability of the battery device.

[0005] In the first aspect, the present application provides a battery device, comprising: a battery assembly, wherein the number of battery assemblies is multiple, and the multiple battery assemblies are arranged along a first direction, each battery assembly includes a battery cell and a first wall arranged in pairs, the first walls arranged in pairs are spaced apart along a second direction, and the space between the first walls arranged in pairs forms a accommodating cavity, and the battery cell is arranged in the accommodating cavity; a thermal management assembly, comprising a heat exchanger and a connector, a heat exchanger is provided between two adjacent battery assemblies along the first direction, the heat exchanger is configured to exchange heat with the battery cell, the heat exchanger is connected to the connector on at least one side along the second direction, and the connector is connected to the first wall, and the first direction intersects with the second direction.

[0006] In some embodiments of the first aspect, a heat exchange element is provided between two adjacent battery assemblies so that the heat exchange element can simultaneously exchange heat with the battery cells in the battery assemblies located on both sides thereof, which is beneficial to reducing the number of thermal management components and reducing the cost of the battery device. In addition, the connector connected to the heat exchange element can also be connected to the first wall, which can provide a certain traction force to the first wall to effectively prevent the first wall from being deformed or displaced when the battery cell expands, thereby improving the reliability of the battery device.

[0007] In some embodiments, at least one side of the connecting member along the first direction protrudes from the heat exchange member, and at least a portion of the connecting member is provided on a side of at least one first wall facing away from the accommodating cavity along the second direction.

[0008] In the above technical solution, at least part of the connecting member is arranged on the side of the first wall facing away from the accommodating cavity along the second direction, so that the connecting member can better limit the first wall, thereby further preventing the first wall from deforming or displacing.

[0009] In some embodiments, the connecting member includes a first connecting portion and a second connecting portion. Along the second direction, the first connecting portion is connected between the second connecting portion and the heat exchange member. The second connecting portion protrudes from the first connecting portion on at least one side along the first direction, and at least one first wall is provided with a second connecting portion on a side facing away from the accommodating cavity along the second direction, and is connected to the first connecting portion along one side of the first direction.

[0010] In the above technical solution, it is beneficial to increase the area of ​​the first wall limited by the connecting member, thereby better limiting the deformation or displacement of the first wall.

[0011] In some embodiments, the heat exchange element has a medium flow channel and an inlet and an outlet respectively connected to the medium flow channel. The medium flow channel is configured to allow the heat exchange medium to flow. The inlet is arranged on either side of the heat exchange element along the third direction, and the outlet is arranged on either side of the heat exchange element along the third direction. The first direction, the second direction and the third direction intersect with each other.

[0012] By setting in the above manner, the layout is reasonable, interference between the inlet and outlet and the first wall can be effectively avoided, and assembly is facilitated.

[0013] In some embodiments, the battery cell has a first side opposite to each other along a first direction, a second side opposite to each other along a second direction, and a third side opposite to each other along a third direction, the area of ​​the second side is greater than the area of ​​the first side, and the area of ​​the second side is greater than the area of ​​the third side, and the first direction, the second direction, and the third direction intersect with each other.

[0014] In the above technical solution, by setting the second surface with the largest area in the battery cell toward the first wall, the first wall connected to the connector can better resist the expansion force generated by the battery cell along the second direction, which is beneficial to reducing the deformation of the first wall and the battery cell, thereby improving the reliability of the battery device.

[0015] In some embodiments, the battery cell further includes an electrode terminal disposed along at least one side of the third direction; and / or the battery cell further includes a pressure relief mechanism disposed along at least one side of the third direction; the first direction, the second direction, and the third direction intersect with each other.

[0016] By setting in the above manner, the layout is reasonable, which can effectively avoid interference between the electrode terminals or the pressure relief mechanism and the first wall, and is convenient for assembly.

[0017] In some embodiments, the battery device further includes a first adhesive layer. Along the first direction, the first adhesive layer is provided between the surfaces of the battery cell and the heat exchange element facing each other, and the battery cell and the heat exchange element are bonded via the first adhesive layer.

[0018] In the above technical solution, the heat exchanger and the battery cells located on both sides thereof are respectively bonded to each other through a first adhesive layer to form a whole, which is beneficial to improving the connection stability between the two, thereby improving the thermal management capability of the thermal management component for the battery cells, and can also prevent the battery cells from being displaced due to collision or vibration, thereby improving the reliability of the battery device.

[0019] In some embodiments, the battery device further includes a second wall. Along the first direction, the second wall is provided on the side of one of the outermost battery assemblies facing away from the heat exchanger, and the second wall is respectively connected to the paired first walls.

[0020] In the above technical solution, only one of the battery assemblies located on the outermost side is connected to the second wall, which is beneficial to reducing the cost and weight of the battery device.

[0021] In some embodiments, the battery device further includes a second adhesive layer. Along the first direction, the second adhesive layer is provided between the battery cell and the second wall's surfaces facing each other, and the battery cell and the second wall are bonded together via the second adhesive layer.

[0022] In the above technical solution, the battery cells in one of the outermost battery assemblies are bonded to the second wall via the second adhesive layer, which is beneficial to improving the connection stability between the two, thereby improving the reliability of the battery device.

[0023] In some embodiments, the second wall is detachably connected to the first wall.

[0024] In the above technical solution, by arranging the second wall and the first wall to be detachably connected, subsequent maintenance or replacement of the second wall is facilitated, which helps to reduce the cost of the battery device.

[0025] In some embodiments, the second wall includes a wall body and a first protrusion, and the first protrusion is connected to at least one side of the wall body along the second direction. Along the first direction, the first protrusion protrudes from the wall body toward the connecting member and is connected to the side surface of the first wall along the second direction facing away from the accommodating cavity.

[0026] In the above technical solution, the second wall is connected to the first wall via the first protrusion, which not only facilitates the connection, but the first protrusion can also limit the first wall along the second direction to improve the structural stability of the first wall, which is beneficial to improving the reliability of the battery device.

[0027] In some embodiments, the battery device further includes a limiting member. Along the first direction, a limiting member is provided on the side of another battery assembly located on the outermost side facing away from the second wall, and the limiting member is respectively connected to the paired first walls.

[0028] In the above technical solution, the limiting member can not only limit the battery cells arranged away from the second wall, but also be connected to the first wall to improve the structural stability of the first wall, thereby facilitating the improvement of the performance and reliability of the battery device.

[0029] In some embodiments, the first direction is the direction of gravity, the second wall is located at the bottom end of the battery assembly along the first direction, and the limiting member is located at the top end of the battery assembly along the first direction.

[0030] In the above technical solution, by using the second wall as the bottom support structure of the battery device, the weight of the battery cells can be better dispersed, the overall gravity distribution of the battery device is optimized, and the reliability of the battery device is further improved.

[0031] In some embodiments, there are multiple limiting members, and the multiple limiting members are spaced apart along the third direction, and the first direction, the second direction, and the third direction intersect with each other.

[0032] In the above technical solution, not only can the limiting effect of the limiting member on the battery cell be better improved, but the connection positions between the first wall and the multiple limiting members can also be more dispersed to avoid stress concentration, thereby better improving the reliability of the battery device.

[0033] In some embodiments, the limiting member is detachably connected to the first wall.

[0034] In the above technical solution, the assembly, maintenance or replacement of the limiting member is facilitated, and the flexibility of use of the battery device is improved, so that the number and position of the limiting member can be set more flexibly.

[0035] In some embodiments, the limit member includes a main body and a second protrusion, and the second protrusion is connected to at least one side of the main body along the second direction. Along the first direction, the second protrusion protrudes from the main body toward the side where the first wall is located, and is connected to the side surface of the first wall along the second direction facing away from the accommodating cavity.

[0036] In the above technical solution, the limiting member is connected to the first wall via the second protrusion, which not only facilitates the connection, but the second protrusion can also limit the first wall along the second direction to improve the structural stability of the first wall, which is beneficial to improving the reliability of the battery device.

[0037] In some embodiments, the battery assembly further includes a support wall, which is disposed in the accommodating cavity and connected between the first walls arranged in pairs. The support wall divides the accommodating cavity into sub-cavities arranged along a third direction. Each sub-cavity is provided with a battery cell, and the first direction, the second direction, and the third direction intersect with each other.

[0038] In the above technical solution, by providing a support wall in the accommodating cavity, it is beneficial to enhance the overall structural strength of the battery assembly, thereby helping to improve the reliability of the battery device.

[0039] In some embodiments, along the second direction, a side surface of the first wall facing the accommodating cavity is recessed inward to form a first recess, and a third protrusion is provided on the side of the supporting wall facing the first recess, and the third protrusion is engaged with the first recess.

[0040] In the above technical solution, by providing a snap-fit ​​connection between the first wall and the supporting wall, it is beneficial to improve assembly efficiency.

[0041] In some embodiments, the battery device further includes an adapter, the thermal management component has a through hole, the adapter sequentially extends into the first recess, the third protrusion, and the through hole along the first direction, and connects the first wall, the support wall, and the thermal management component.

[0042] In the above technical solution, by providing an adapter to connect the first wall, the support wall and the thermal management assembly, the connection stability of the battery device can be further enhanced.

[0043] In some embodiments, along the first direction, the surface of the first wall facing away from the heat exchanger is recessed inward to form a second recess, the first recess is spaced apart from the second recess, and the adapter extends into the second recess, the first recess, the third protrusion and the through hole in sequence along the first direction.

[0044] In the above technical solution, the adapter can extend from the second recess into the first recess, the third protrusion and the through hole to connect the first wall, the support wall and the thermal management component, thereby facilitating the assembly of the adapter.

[0045] In some embodiments, along the first direction, the surface of the adapter facing away from the heat exchange element is located in the second recess. This arrangement can make the adapter and the first wall more compact, which is conducive to improving the structural compactness of the battery device.

[0046] In a second aspect, the present application provides an electrical device, comprising a battery device provided according to any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0047] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0049] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0050] Figure 2 A schematic structural diagram of a battery cell assembly in a battery device provided in some embodiments of the present application;

[0051] Figure 3 A schematic diagram of an exploded structure of a battery cell in a battery device provided in some embodiments of the present application;

[0052] Figure 4 A schematic structural diagram of a battery device provided in some embodiments of the present application;

[0053] Figure 5 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application;

[0054] Figure 6 for Figure 4 Enlarged view of point P in the middle;

[0055] Figure 7 A schematic diagram of a partial structure of a battery device provided in some embodiments of the present application;

[0056] Figure 8 A schematic diagram of a partially exploded structure of a battery device provided in some embodiments of the present application;

[0057] Figure 9 A schematic structural diagram of a first wall in a battery device provided in some embodiments of the present application;

[0058] Figure 10 A schematic structural diagram of a support wall in a battery device provided in some embodiments of the present application;

[0059] Figure 11 A partial cross-sectional view of a battery device provided in some embodiments of the present application;

[0060] Figure 12 A schematic structural diagram of a battery device provided in some other embodiments of the present application;

[0061] Figure 13 for Figure 7 Enlarged view of the middle Q.

[0062] The reference numerals of the specific embodiments are as follows:

[0063] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 400, battery cell assembly;

[0064] 1. Battery assembly; 10. First wall; 11. Accommodation cavity; 101. Subcavity; 12. First recess; 13. Second recess;

[0065] 20. Battery cell; 201. Housing; 2011. Casing; 2012. End cap; 202. Electrode assembly; 203. Pressure relief mechanism; 204. Electrode terminal; 2001. First surface; 2003. Third surface;

[0066] 30. Support wall; 301. Third convex portion;

[0067] 2. Thermal management component; 21. Heat exchange component; 22. Connector; 221. First connecting portion; 222. Second connecting portion; 2201. Via hole;

[0068] 3. Second wall; 31. Wall body; 32. First convex part;

[0069] 4. Limiting member; 41. Main body; 42. Second convex portion;

[0070] 5. Adapter;

[0071] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0072] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0073] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" 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-secondary relationship.

[0074] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0075] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0076] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0077] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0078] The term "plurality" used in this application refers to two or more (including two).

[0079] Currently, market developments indicate that battery applications are becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As battery applications continue to expand, market demand is also growing.

[0080] 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.

[0081] The battery cells can be 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, etc., which are not limited in the embodiments of the present application.

[0082] In order to improve the energy density of a battery device in the related art, multiple battery modules consisting of battery cells are usually stacked to form a battery device. However, this structure has the problem of increased cost, and the overall structural stability of the battery device formed by stacking multiple layers of battery packs cannot be guaranteed.

[0083] Based on the above technical problems, the present application provides a battery device, including a battery assembly and a thermal management assembly. There are multiple battery assemblies, and the multiple battery assemblies are arranged along the first direction. Each battery assembly includes a battery cell and a first wall arranged in pairs. The first walls arranged in pairs are spaced apart along the second direction. The space between the first walls arranged in pairs forms an accommodating cavity, and the battery cell is arranged in the accommodating cavity. The thermal management assembly includes a heat exchanger and a connector. Along the first direction, a heat exchanger is provided between two adjacent battery assemblies. The heat exchanger is configured to exchange heat with the battery cell. The heat exchanger is connected to a connector on at least one side of the heat exchanger along the second direction, and the connector is connected to the first wall. The first direction intersects with the second direction.

[0084] By configuring the thermal management component to include a heat exchanger and a connecting member, the heat exchanger can simultaneously perform thermal management on the battery cells in the battery assemblies located on both sides thereof, which is beneficial to reducing the number of thermal management components and thus reducing the cost of the battery device. In addition, the connecting member connected to the heat exchanger can also be connected to the first wall, and can provide a certain traction force to the first wall to effectively prevent the first wall from being deformed or displaced when the battery cells expand, thereby helping to improve the reliability of the battery device.

[0085] The technical solutions described in the embodiments of the present application are applicable to various battery devices or electrical equipment using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0086] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0087] For example, Figure 1 As shown, Figure 1This is a structural diagram of a vehicle 1000 according to one embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. A motor 300, a controller 200, and a battery device 100 may be provided inside the vehicle 1000. The controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 may be provided at the bottom, front, or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000, for example, for the starting, navigation, and operating power requirements of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used 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.

[0088] See also Figure 2 The battery apparatus 100 mentioned in the embodiments of the present application may include one or more battery cell assemblies 400 for providing voltage and capacity. The battery cell assembly 400 may include multiple battery cells 20, which are connected in series, parallel, or hybrid via a busbar.

[0089] In some embodiments, a battery cell assembly 400 is generally formed by arranging a plurality of battery cells 20 .

[0090] As an example, the battery cell assembly 400 may be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 with a cable tie.

[0091] As an example, the battery cell 20 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries.

[0092] See also Figure 3 The battery cell 20 includes a housing 201 and an electrode assembly 202 .

[0093] The housing 201 is a component used to create an internal environment for the battery cell 20. This internal environment can accommodate the electrode assembly 202, as well as the electrolyte and other components. Optionally, the housing 201 can be made of, but is not limited to, metal or non-metallic materials. For example, metal materials can include copper, aluminum, or stainless steel; non-metallic materials can include polyethylene, polypropylene, or polyvinyl chloride.

[0094] For example, the housing 201 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.

[0095] In some embodiments, the housing 201 can be either sealed or unsealed. For example, if the housing 201 is unsealed, it protects the electrode assembly 202. A sealing bag is located between the housing 201 and the electrode assembly 202 to encapsulate the electrode assembly 202 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating material or an aluminum-plastic film. If the housing 201 is sealed, it encapsulates the electrode assembly 202, the electrolyte, and other components.

[0096] In some embodiments, the housing 201 includes an end cap 2012 and a shell 2011. The shell 2011 has a shell opening, and the end cap 2012 covers the shell opening. The shell 2011 may have one or more shell openings. One or more end caps 2012 may also be provided.

[0097] The shape of the housing 201 may be determined according to the specific shape of the electrode assembly 202. For example, if the electrode assembly 202 is a rectangular parallelepiped structure, a rectangular housing may be selected; if the electrode assembly 202 is a cylindrical structure, a cylindrical housing may be selected.

[0098] The electrode assembly 202 is a component in the battery cell 20 where electrochemical reactions occur. The housing 201 may contain one or more electrode assemblies 202 .

[0099] In some embodiments, the shape of the electrode assembly 202 can be cylindrical, flat, or polygonal.

[0100] The electrode assembly 202 may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0101] The electrode assembly 202 includes a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of the battery cell 20, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0102] like Figure 3 As shown, the battery cell 20 further includes an electrode terminal 204 .

[0103] The electrode terminal 204 may be provided on the outer shell 201. Alternatively, the electrode terminal 204 may be provided on the end cap 2012, or the housing 2011 may be provided with the electrode terminal 204, or the end cap 2012 and the housing 2011 may each be provided with an electrode terminal 204.

[0104] In some embodiments, at least one electrode terminal 204 is provided on the housing 201, and the electrode terminal 204 is electrically connected to the tab of the electrode assembly 202. The electrode terminal 204 can be directly connected to the tab or indirectly connected to the tab via a current collecting member.

[0105] Electrode terminal 204 can be used to electrically connect to electrode assembly 202 to output or input electrical energy from the battery cell. Electrode terminal 204 can be electrically connected to electrode assembly 202 by connecting to a tab. The tab electrically connected to electrode terminal 204 can be a positive tab or a negative tab.

[0106] like Figure 3 As shown, the battery cell 20 further includes a pressure relief mechanism 203 for discharging gas from the battery cell 20. The pressure relief mechanism 203 may be provided on the outer shell 201. Alternatively, the pressure relief mechanism 203 may be provided on the end cap 2012, or on the housing 2011, or both the end cap 2012 and the housing 2011 may be provided with a pressure relief mechanism 203.

[0107] For example, when the internal pressure or temperature of a battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 203 is activated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism 203 actuates or a weakened structure within the pressure relief mechanism 203 is destroyed, thereby creating an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the material of one or more of the positive electrode sheet, negative electrode sheet, electrolyte, and separator in the battery cell 20.

[0108] As an example, the pressure relief mechanism 203 may be integrally formed with the housing 201 .

[0109] As an example, the pressure relief mechanism 203 may also be separately provided and connected to the housing 201 .

[0110] The "activation" mentioned in this application means that the pressure relief mechanism 203 produces an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell 20 can be released. The action produced by the pressure relief mechanism 203 may include but is not limited to: the components in the pressure relief mechanism 203 move to form an exhaust channel, at least a part of the pressure relief mechanism 203 ruptures, breaks, is torn or opened, etc. When the pressure relief mechanism 203 is actuated, the high-temperature and high-pressure substances inside the battery cell 20 will be discharged outward from the actuated part as exhaust. In this way, the pressure and temperature of the battery cell can be relieved under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0111] The emissions from the battery cells 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, separator fragments, high-temperature and high-pressure gas generated by the reaction, flames, and the like.

[0112] Please also refer to Figures 4 to 7 According to an embodiment of the present application, a battery device 100 is provided, comprising a battery assembly 1 and a thermal management assembly 2. There are multiple battery assemblies 1, and the multiple battery assemblies 1 are arranged along a first direction X. Each battery assembly 1 includes a battery cell 20 and a pair of first walls 10. The paired first walls 10 are spaced apart along a second direction Y. The space between the paired first walls 10 forms a receiving cavity 11, and the battery cell 20 is disposed in the receiving cavity 11. The thermal management assembly 2 includes a heat exchanger 21 and a connector 22. Along the first direction X, a heat exchanger 21 is provided between two adjacent battery assemblies 1. The heat exchanger 21 is configured to exchange heat with the battery cell 20. The connector 22 is connected to at least one side of the heat exchanger 21 along the second direction Y, and the connector 22 is connected to the first wall 10. The first direction X intersects with the second direction Y.

[0113] In the embodiment of the present application, the first direction X may be the direction of gravity, that is, the height direction of the battery device 100, the second direction Y may be the length direction of the battery device 100, and the third direction Z may be the width direction of the battery device 100. Alternatively, the second direction Y may be the width direction of the battery device 100, and the third direction Z may be the length direction of the battery device 100.

[0114] Exemplarily, the first direction X is the height direction of the battery device 100 , the second direction Y is the width direction of the battery device 100 , and the third direction Z is the length direction of the battery device 100 .

[0115] The battery assembly 1 includes a battery cell 20. The number of battery cells 20 can be multiple. Multiple battery cells 20 can be combined to form a battery cell assembly 400 to be accommodated in the accommodating cavity 11. One or more battery cell assemblies 400 can be arranged in the accommodating cavity 11. Figure 4and Figure 7 As shown, two battery cell assemblies 400 arranged along the third direction Z are provided in the accommodating cavity 11 , and each battery cell assembly 400 includes a plurality of battery cells 20 arranged along the second direction Y.

[0116] The battery assembly 1 also includes a pair of first walls 10, which can protect both sides of the battery cells 20 along the second direction Y. Optionally, the battery cells 20 can abut against the first walls 10, or the battery cells 20 can be bonded to the first walls 10 via an adhesive. This helps to improve the first walls 10's ability to limit the battery cells 20 along the second direction Y, improves the reliability of the battery assembly 100, and ensures close contact between the first walls 10 and the battery cells 20, thereby increasing the structural compactness of the battery assembly 100.

[0117] In the embodiment of the present application, the battery assembly 1 can be assembled, and then multiple battery assemblies 1 and the thermal management assembly 2 can be assembled.

[0118] By configuring the battery device 100 to include a stacked structure of multiple battery assemblies 1 arranged along the first direction X, the battery device 100 can include a greater number of battery cells 20 , thereby facilitating an improvement in the energy density of the battery device 100 .

[0119] The thermal management component 2 is used to dissipate heat and cool or heat the battery cell 20 to adjust the temperature of the battery cell 20 within an appropriate range, so that the battery cell 20 can operate under good temperature conditions, which is beneficial to improving the operating reliability and service life of the battery cell 20.

[0120] The thermal management assembly 2 includes a heat exchanger 21 and a connector 22. The heat exchanger 21 is positioned between two adjacent battery assemblies 1 along a first direction X to exchange heat with the battery cells 20 disposed within each of the two adjacent battery assemblies 1. The connector 22 is connected to the first wall 10 to provide positioning and restraint for the first wall 10 of the battery assembly 1 during assembly. When the battery cells 20 expand, the connector 22 also provides a restraining force on the first wall 10 to limit movement and deformation of the first wall 10.

[0121] Optionally, the connecting member 22 and the first wall 10 can be connected by welding or bonding, or can be connected by fasteners such as bolts and screws, or can be set as a snap-fit ​​connection, or the two can be set in abutment. All of the above connection methods can enable the connecting member 22 to provide a certain restraining force and limiting effect on the first wall 10.

[0122] like Figure 4As shown, exemplarily, the size of the battery assembly 1 in the second direction Y is smaller than its size in the third direction Z. By setting it in this way, the protection and limiting area of ​​the first wall 10 on the battery cell 20 can be increased. The layout is reasonable, which is conducive to further improving the reliability of the battery device 100.

[0123] The number of battery assemblies 1 can be two, three, or even more, and the number of thermal management assemblies 2 can be one, two, or even more. It should be noted that the number of thermal management assemblies 2 is always one less than the number of battery assemblies 1. That is, only one thermal management assembly 2 is required to perform thermal management on the battery cells 20 located on both sides thereof along the first direction X, thereby reducing the number of parts of the thermal management assembly 2. This is beneficial for effectively solving the heat dissipation requirements of the battery cells 20 while reducing costs, and can also increase space utilization, making the battery device 100 more compact as a whole, or even improving the energy density of the battery device 100.

[0124] Exemplarily, there are two battery assemblies 1 , and a thermal management assembly 2 is installed between the two battery assemblies 1 to make the size of the battery device 100 moderate and to reduce the difficulty of assembly.

[0125] The battery device 100 provided in some embodiments of the present application, by configuring the thermal management component 2 to include a structure including a heat exchanger 21 and a connector 22, enables the heat exchanger 21 to simultaneously perform thermal management on the battery cells 20 in the battery assembly 1 located on both sides thereof, which is beneficial to reducing the number of thermal management components 2 and reducing the cost of the battery device 100. In addition, the connector 22 connected to the heat exchanger 21 is connected to the first wall 10, which can effectively prevent the first wall 10 from being deformed or displaced when the battery cell 20 expands, which is beneficial to improving the structural stability of the battery assembly 1, thereby improving the reliability of the battery device 100. Therefore, by configuring in the above manner, it is possible to reduce the cost of the battery device 100 while ensuring thermal management of the multiple layers of battery cells 20 along the first direction X, and can also improve the reliability of the battery device 100.

[0126] Optionally, the heat exchange element 21 can be configured as a cooling plate or a heating plate. Alternatively, the heat exchange element 21 can include a medium flow channel for the flow of a heat exchange medium, with an inlet and an outlet connected to the medium flow channel to facilitate the inflow and outflow of the heat exchange medium. The heat exchange medium can take various forms, such as water, air, or phase change materials. Optionally, the inlet and outlet can be located on the same side or on opposite sides of the heat exchange element 21 along the third direction Z to prevent interference with the connector 22, ensuring a rational layout and facilitating assembly.

[0127] Optionally, the connector 22 can be configured as a cooling plate or a heating plate, or a medium flow channel for the flow of a heat exchange medium can be provided in the connector 22 to perform heat exchange on at least one side of the first wall 10 along the second direction Y, thereby achieving thermal management of the battery cell 20, which is beneficial to improving the thermal management efficiency of the thermal management component 2 for the battery cell 20, so that the connector 22 can not only play the role of limiting and resisting deformation, but also play the role of heat exchange.

[0128] Optionally, a cavity is provided in the connector 22 so that it only serves to limit position and resist deformation. That is, the connector 22 is made into a non-solid structure, which is beneficial to reducing the weight and cost of the battery device 100.

[0129] Optionally, both sides of the heat exchange element 21 along the second direction Y are connected with connecting elements 22 to better limit the first wall 10 and resist deformation.

[0130] Optionally, the heat exchange element 21 and the connector 22 can be provided separately, which is beneficial to improving the assembly flexibility of the thermal management component 2. Of course, the two can also be integrally formed to ensure the structural strength of the thermal management component 2.

[0131] See also Figure 4 、 Figure 6 and Figure 7 In some embodiments, the connector 22 protrudes from the heat exchange element 21 on at least one side along the first direction X, and at least a portion of the connector 22 is provided on a side of at least one first wall 10 facing away from the accommodating cavity 11 along the second direction Y.

[0132] Exemplarily, the connecting member 22 protrudes from the heat exchange member 21 on both sides along the first direction X, so that the first wall 10 located on both sides of the heat exchange member 21 along the first direction X is provided with at least part of the connecting member 22 on the side facing away from the accommodating cavity 11 along the second direction Y.

[0133] Optionally, all the connecting parts 22 are located on the side of the first wall 10 facing away from the accommodating cavity 11 along the second direction Y, and are connected to the first wall 10. Along the first direction X, a heat exchange part 21 is provided between two adjacent first walls 10, and a heat exchange part 21 is provided between two adjacent battery cells 20.

[0134] Optionally, a portion of the connector 22 is located on the side of the first wall 10 facing away from the accommodating cavity 11 along the second direction Y, and another portion of the connector 22 is located between two adjacent first walls 10 along the first direction X, and the heat exchange member 21 is only located between two adjacent battery cells 20 along the first direction X.

[0135] By configuring in the above manner, the connector 22 can limit the first wall 10 along the second direction Y and provide a restraining force on the first wall 10 along the second direction Y to prevent the first wall 10 from being displaced or deformed under the expansion force of the battery cell 20, which is beneficial to improving the reliability of the battery assembly 1 and thus the reliability of the battery device 100.

[0136] See also Figure 4 、 Figure 6 and Figure 7 In some embodiments, the connecting member 22 includes a first connecting portion 221 and a second connecting portion 222. Along the second direction Y, the first connecting portion 221 is connected between the second connecting portion 222 and the heat exchange member 21, and the second connecting portion 222 protrudes from the first connecting portion 221 on at least one side along the first direction X, and at least one first wall 10 is provided with a second connecting portion 222 on a side facing away from the accommodating cavity 11 along the second direction Y, and is connected to the first connecting portion 221 along one side of the first direction X.

[0137] Exemplarily, the second connection portion 222 protrudes from the first connection portion 221 on both sides along the first direction X, so that the first wall 10 located on both sides of the heat exchange element 21 along the first direction X is provided with a second connection portion 222 on the side facing away from the accommodating cavity 11 along the second direction Y.

[0138] Among them, in the first direction X, a first connecting portion 221 is connected between two adjacent first walls 10, and the first wall 10 and the second connecting portion 222 are arranged along the second direction Y. The second connecting portion 222 can be connected to the first wall 10, or the second connecting portion 222 can be only in contact with the first wall 10, or there can be a gap between the second connecting portion 222 and the first wall 10. The above-mentioned settings can enable the second connecting portion 222 to play a certain role in limiting and anti-deformation of the first wall 10.

[0139] By configuring in the above manner, the area of ​​the connector 22 for limiting the first wall 10 and resisting deformation can be increased, thereby facilitating the limiting effect of the connector 22 on the first wall 10 and better improving the reliability of the battery device 100 .

[0140] In some embodiments, the heat exchange element 21 has a medium flow channel and an inlet and an outlet respectively connected to the medium flow channel. The medium flow channel is configured to allow the heat exchange medium to flow. The inlet is arranged on either side of the heat exchange element 21 along the third direction Z, and the outlet is arranged on either side of the heat exchange element 21 along the third direction Z. The first direction X, the second direction Y and the third direction Z intersect with each other.

[0141] By configuring in the above manner, interference between the inlet and outlet and the first wall 10 can be avoided, the layout is reasonable, and the assembly is convenient, thereby facilitating the improvement of the heat exchange efficiency and reliability of the heat exchange element 21 .

[0142] Exemplarily, the inlet and the outlet are both arranged on the same side of the heat exchange element 21 along the third direction Z to facilitate assembly.

[0143] like Figure 5 As shown, in some embodiments, the battery cell 20 has a first surface 2001 opposite along a first direction X, a second surface opposite along a second direction Y, and a third surface 2003 opposite along a third direction Z, the area of ​​the second surface is greater than the area of ​​the first surface 2001, and the area of ​​the second surface is greater than the area of ​​the third surface 2003, and the first direction X, the second direction Y, and the third direction Z intersect with each other.

[0144] Among them, the two first surfaces 2001 are spaced apart along the first direction X, the two third surfaces 2003 are spaced apart along the third direction Z, and the two second surfaces are spaced apart along the second direction Y. It can be understood that the second surface is the surface set toward the first wall 10 and is not shown in the figure.

[0145] Specifically, multiple battery cells 20 are arranged along the second direction Y, and multiple battery cells 20 are adjacent to each other through the second surface with the largest area. When the battery cell 20 undergoes thermal expansion, its second surface with the largest area is prone to deformation. Therefore, by providing the first wall 10 on the side facing the second surface with the largest area in the battery cell 20, it is beneficial to improve the limiting effect of the first wall 10 on the battery cell 20. In addition, the first wall 10 is also connected to the connecting member 22, so as to increase the rigidity of the first wall 10, and thus better resist the thermal expansion of the battery cell 20 along the second direction Y, so as to avoid the displacement of the battery cell 20 during thermal expansion or mechanical vibration, which is beneficial to further improve the reliability of the battery device 100.

[0146] like Figure 4 As shown, in some embodiments, the battery cell 20 further includes an electrode terminal 204 disposed along at least one side of the third direction Z. And / or, the battery cell 20 further includes a pressure relief mechanism 203 disposed along at least one side of the third direction Z. The first direction X, the second direction Y, and the third direction Z intersect with each other.

[0147] By configuring in the above manner, it is possible to avoid interference between the electrode terminal 204 and the pressure relief mechanism 203 and the first wall 10 and the thermal management component 2 , resulting in a reasonable layout and easy assembly.

[0148] Exemplarily, the electrode terminal 204 and the pressure relief mechanism 203 are both located on the same side of the battery cell 20 along the third direction Z. Two electrode terminals 204 are provided, and the two electrode terminals 204 are spaced apart along the first direction X. The pressure relief mechanism 203 is located between the two electrode terminals 204 along the first direction X.

[0149] In some embodiments, the battery device 100 further includes a first adhesive layer. Along the first direction X, a first adhesive layer is provided between the surfaces of the battery cell 20 and the heat exchange element 21 facing each other. The battery cell 20 and the heat exchange element 21 are bonded together by the first adhesive layer.

[0150] That is to say, a first adhesive layer is provided on both sides of the heat exchange element 21 along the first direction X, and the battery cells 20 located on both sides of the heat exchange element 21 along the first direction X are directly bonded and fixed to the heat exchange element 21 through the first adhesive layer, which is beneficial to improving the connection strength between the battery cells 20 and the heat exchange element 21, thereby helping to improve the heat exchange effect of the heat exchange element 21 on the battery cells 20, and can also prevent the battery cells 20 from being displaced due to collision or vibration, thereby helping to improve the reliability of the battery device 100.

[0151] In addition, the battery cell 20 and the heat exchange element 21 are directly bonded and fixed by the first adhesive layer. That is, in the first direction X, there is no protective wall or protective plate or other structure on the side of the battery assembly 1 facing the heat exchange element 21, so that the battery cell 20 located in the battery assembly 1 is arranged closer to the heat exchange element 21, which is beneficial to improving the heat exchange effect of the heat exchange element 21 on the battery cell 20, and is also beneficial to improving the overall structural compactness of the battery device 100 and reducing the cost and weight of the battery device 100.

[0152] The first adhesive layer is used to bond the battery cell 20 and the heat exchange element 21. The first adhesive layer can be made of a material with adhesive properties. Of course, the first adhesive layer can also be made of a material with thermal conductivity, which is beneficial to improving the efficiency of heat exchange between the battery cell 20 and the heat exchange element 21, thereby improving the thermal management capability of the thermal management component 2 for the battery cell 20, and further improving the performance of the battery device 100.

[0153] Optionally, the first adhesive layer is a thermally conductive structural adhesive. Optionally, the thermally conductive structural adhesive may include but is not limited to any one of epoxy resin thermally conductive adhesive and silicone thermally conductive adhesive.

[0154] Furthermore, by providing the first adhesive layer, while ensuring stable connection between the battery cell 20 and the heat exchange element 21 , the risk of collision between the heat exchange element 21 and the battery cell 20 due to direct contact can be reduced, thereby improving the reliability of the battery device 100 .

[0155] See also Figures 3 to 7 In some embodiments, the battery device 100 further includes a second wall 3. Along the first direction X, a second wall 3 is provided on the side of one of the outermost battery assemblies 1 facing away from the heat exchanger 21, and the second wall 3 is respectively connected to the paired first walls 10.

[0156] "One of the battery assemblies 1 located outermost along the first direction X" means that a second wall 3 is provided on the side of one of the two battery assemblies 1 located at both ends of the first direction X, facing away from the other. The second wall 3 may be spaced apart from the heat exchange element 21 along the first direction X, and a battery cell 20 may be provided between the second wall 3 and the heat exchange element 21 along the first direction X.

[0157] The second wall 3 is used to cooperate with the first wall 10 of the outermost battery assembly 1 to limit and protect the battery cell 20 along the first direction X to prevent the battery cell 20 from being displaced in the first direction X. In addition, the second wall 3 is connected to the first wall 10, which can also enhance the structural strength of the battery device 100, thereby helping to improve the reliability of the battery device 100.

[0158] Furthermore, the second wall 3 can provide further structural support for the battery assembly 1, further preventing displacement or deformation of the first wall 10, thereby improving the structural stability of the battery device 100. Furthermore, the second wall 3 is connected only to one of the outermost battery assemblies 1, which helps save materials used in the battery device 100, thereby reducing the cost and weight of the battery device 100.

[0159] Optionally, among the multiple battery assemblies 1 , the battery cells 20 in the battery assemblies 1 that are closer to the second wall 3 along the first direction X may abut against the second wall 3 or may be adhered to the second wall 3 .

[0160] In some embodiments, the battery device 100 further includes a second adhesive layer. Along the first direction X, a second adhesive layer is provided between the battery cell 20 and the second wall 3 facing each other. The battery cell 20 and the second wall 3 are bonded together by the second adhesive layer.

[0161] That is to say, a second adhesive layer is provided on the side of the second wall 3 toward the battery cell 20 along the first direction X. Among the multiple battery assemblies 1, the battery cell 20 in the battery assembly 1 closer to the second wall 3 along the first direction X is directly bonded and fixed to the second wall 3 through the second adhesive layer, which is beneficial to improving the connection strength between the battery cell 20 and the second wall 3, thereby helping to improve the structural stability and reliability of the battery device 100.

[0162] Furthermore, by providing the second adhesive layer, the battery cell 20 and the second wall 3 are stably connected, and the risk of collision between the two due to direct contact is reduced, thereby improving the reliability of the battery device 100 .

[0163] Optionally, the second adhesive layer may be made of the same material as the first adhesive layer, or of course, may be made of different materials.

[0164] In some embodiments, the second wall 3 is detachably connected to the first wall 10 .

[0165] By providing a detachable connection between the second wall 3 and the first wall 10, subsequent maintenance or replacement of the second wall 3 is facilitated, which helps reduce the cost of the battery device 100. It is also convenient for processing and manufacturing, which helps reduce the processing difficulty and improves the flexibility of use of the battery device 100.

[0166] Optionally, the second wall 3 and the first wall 10 can be connected by fasteners such as bolts, buckles, slots, etc. to ensure the stability and reliability of the connection. Alternatively, the second wall 3 and the first wall 10 can also be set to a detachable connection mode of snap connection.

[0167] See also Figure 4 and Figure 5 In some embodiments, the second wall 3 includes a wall body 31 and a first protrusion 32. The wall body 31 is connected to the first protrusion 32 on at least one side along the second direction Y. Along the first direction X, the first protrusion 32 protrudes from the wall body 31 toward the connecting member 22 and is connected to the side surface of the first wall 10 along the second direction Y facing away from the accommodating cavity 11.

[0168] The first protrusion 32 is used to connect with the first wall 10 to achieve the connection between the second wall 3 and the first wall 10. By providing the first protrusion 32, the connection area between the second wall 3 and the first wall 10 can be increased, thereby helping to improve the connection strength and stability therebetween. In addition, the first protrusion 32 can also play a guiding and positioning role, so that the second wall 3 can be more easily and accurately docked with the first wall 10 during installation, thereby improving assembly efficiency and accuracy. In addition, the first protrusion 32 can also limit the movement of the first wall 10 along the second direction Y to avoid displacement of the first wall 10 along the second direction Y, thereby improving the structural stability of the first wall 10, and helping to improve the reliability of the battery device 100.

[0169] Optionally, both sides of the wall body 31 along the second direction Y are connected to the first protrusions 32 .

[0170] Optionally, the first protrusion 32 is detachably connected to the first wall 10 .

[0171] Optionally, the first protrusion 32 and the first wall 10 can be detachably connected by a fastener. The first protrusion 32 can be provided with a first through hole, and the fastener passes through the first through hole along the second direction Y and connects the first protrusion 32 and the first wall 10. This provides a reasonable layout, facilitates assembly, and can reduce the space occupied by the battery device 100 in the first direction X.

[0172] Please continue reading Figure 4 and Figure 5In some embodiments, the battery device 100 further includes a limiting member 4. Along the first direction X, a limiting member 4 is provided on the side of another battery assembly 1 located on the outermost side facing away from the second wall 3, and the limiting member 4 is respectively connected to the paired first walls 10.

[0173] That is, one of the two battery assemblies 1 located at both ends of the first direction X has a second wall 3 provided on its side facing away from the other, and the other battery assembly 1 has a stopper 4 provided on its side facing away from the second wall 3. The stopper 4 is used to limit the side of the battery cell 20 facing away from the second wall 3 along the first direction X, preventing the battery cell 20 from shifting or falling off in the first direction X, thereby ensuring the safety of the battery cell 20 and improving the performance and reliability of the battery device 100.

[0174] The limiting members 4 are respectively connected to the paired first walls 10, which can increase the rigidity of the first walls 10 to prevent the first walls 10 from deforming too much, so that the first walls 10 can better provide restraint force on the battery cells 20, thereby helping to improve the structural strength of the first walls 10, and further helping to improve the reliability of the battery device 100.

[0175] By configuring in the above manner, the limiting member 4 can not only limit the battery cell 20 disposed away from the second wall 3 , but also be connected to the first wall 10 to improve the structural stability of the first wall 10 , thereby facilitating improved performance and reliability of the battery device 100 .

[0176] Optionally, the limiting members 4 are detachably connected to the first walls 10 arranged in pairs.

[0177] Optionally, the area of ​​the limiting member 4 is smaller than the area of ​​the second wall 3 , which is beneficial to reducing the cost and weight of the battery device 100 .

[0178] In some embodiments, the first direction X is the direction of gravity, the second wall 3 is located at the bottom end of the battery assembly 1 along the first direction X, and the limiting member 4 is located at the top end of the battery assembly 1 along the first direction X.

[0179] “The first direction X is the direction of gravity” can also be understood as the height direction of the battery device 100 when in use, that is, the battery cells 20 are located above the second wall 3 to be supported by the second wall 3 .

[0180] The battery device 100 provided in some embodiments of the present application, by using the second wall 3 as the bottom support structure of the battery device 100, can prevent the battery cells 20 from being damaged during transportation or assembly of the battery device 100, and can also better disperse the weight of the battery cells 20, thereby optimizing the overall gravity distribution of the battery device 100. In addition, by arranging the limit member 4 at the top of the battery assembly 1, the layout is reasonable, which is conducive to reducing the cost and weight of the battery device 100.

[0181] In some embodiments, the second wall 3 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the second wall 3 may form at least a portion of the floor of the vehicle 1000, or a portion of the second wall 3 may form at least a portion of a cross member or a longitudinal member of the vehicle 1000.

[0182] like Figure 7 As shown, in some embodiments, there are multiple limiting members 4, and the multiple limiting members 4 are spaced apart along the third direction Z. The first direction X, the second direction Y, and the third direction Z intersect with each other.

[0183] The provision of multiple limiting members 4 can further enhance the limiting effect on the side of the battery cell 20 away from the second wall 3 along the first direction X, ensuring that the battery cell 20 is more stable in the first direction X and less likely to be displaced or fall off, thereby improving the reliability of the battery device 100.

[0184] Furthermore, the spacing of the plurality of limiters 4 along the third direction Z can make the limiting effect more uniform and the connection positions between the first wall 10 and the plurality of limiters 4 more dispersed to avoid stress concentration, thereby better improving the reliability of the battery device 100.

[0185] In addition, the provision of multiple limiting members 4 can also improve the overall strength and rigidity of the first wall 10 , so that the battery device 100 can better maintain the stability of its shape and structure when subjected to external forces, thereby ensuring the reliability of the battery device 100 .

[0186] Optionally, the number of the limiting members 4 can be two, three, or even more. The multiple limiting members 4 can be distributed at equal intervals along the third direction Z. Of course, they can also be distributed at intervals according to a certain rule.

[0187] In some embodiments, the limiting member 4 is detachably connected to the first wall 10 .

[0188] By setting the limit member 4 and the first wall 10 in a detachable connection, it is convenient to subsequently maintain or replace the limit member 4, which is beneficial to reducing the cost of the battery device 100. It is also convenient for processing and manufacturing, which is beneficial to reducing the processing difficulty and improving the flexibility of use of the battery device 100, so that the number and position of the limit members 4 can be set more flexibly.

[0189] Optionally, the position limiting member 4 and the first wall 10 can be connected by fasteners such as bolts, buckles, slots, etc. to ensure the stability and reliability of the connection. Alternatively, the position limiting member 4 and the first wall 10 can also be set to a detachable connection method of snap connection.

[0190] like Figure 5As shown, in some embodiments, the limit member 4 includes a main body 41 and a second protrusion 42, and the second protrusion 42 is connected to at least one side of the main body 41 along the second direction Y. Along the first direction X, the second protrusion 42 protrudes from the main body 41 toward the side where the first wall 10 is located, and is connected to the side surface of the first wall 10 along the second direction Y facing away from the accommodating cavity 11.

[0191] The second protrusion 42 is used to connect with the first wall 10 to realize the connection between the limit member 4 and the first wall 10. By setting the second protrusion 42, the connection area between the limit member 4 and the first wall 10 can be increased, thereby helping to improve the connection strength and stability between the two. In addition, the second protrusion 42 can also play a guiding and positioning role, so that the limit member 4 can be more easily and accurately docked with the first wall 10 during installation, thereby improving assembly efficiency and accuracy. In addition, the second protrusion 42 can also limit the movement of the first wall 10 along the second direction Y to avoid displacement of the first wall 10 along the second direction Y, thereby improving the structural stability of the first wall 10, which is beneficial to improving the reliability of the battery device 100.

[0192] Optionally, both sides of the main body 41 along the second direction Y are connected to the second protrusions 42 .

[0193] Optionally, the second protrusion 42 is detachably connected to the first wall 10 .

[0194] Optionally, the second protrusion 42 and the first wall 10 can be detachably connected by a fastener. The second protrusion 42 can be provided with a second through hole, and the fastener passes through the second through hole along the second direction Y and connects the second protrusion 42 and the first wall 10. This provides a reasonable layout, facilitates assembly, and can reduce the space occupied by the battery device 100 in the first direction X.

[0195] See also Figures 4 to 7 In some embodiments, the battery assembly 1 further includes a support wall 30, which is disposed in the accommodating cavity 11 and connected between the paired first walls 10. The support wall 30 divides the accommodating cavity 11 into sub-cavities 101 arranged along the third direction Z. Each sub-cavity 101 is provided with a battery cell 20, and the first direction X, the second direction Y, and the third direction Z intersect with each other.

[0196] As an example, each sub-cavity 101 is provided with one battery cell assembly 400 , and each battery cell assembly 400 includes battery cells 20 arranged along the second direction Y.

[0197] Providing a support wall 30 connected to the first wall 10 within the accommodating chamber 11 helps enhance the structural strength of the first wall 10, thereby improving the reliability of the battery device 100. Furthermore, by dividing the accommodating chamber 11 into multiple sub-cavities 101, each sub-cavity 101 houses a separate battery cell 20, facilitating the positioning and assembly of the battery cells 20.

[0198] Optionally, the battery cell 20 may be against the support wall 30 or may be bonded to the support wall 30 , which is beneficial for improving the stability of the battery cell 20 to prevent displacement thereof and can also make the structure of the battery device 100 more compact.

[0199] Optionally, the support wall 30 is connected along the second direction Y between the first walls 10 arranged in pairs.

[0200] In some embodiments, in the same projection plane perpendicular to the first direction X, the orthographic projection of the limiting member 4 and the orthographic projection of the supporting wall 30 are arranged alternately.

[0201] By setting it up in this way, the spatial layout between the limit member 4 and the support wall 30 can be further optimized, making the internal structure of the battery device 100 more compact and reasonable. In addition, the staggered setting of the limit member and the support wall 30 can avoid stress concentration on the first wall 10, thereby helping to improve the structural stability of the first wall 10.

[0202] Optionally, the support wall 30 can be connected to the first wall 10 by welding or bonding, or the support wall 30 can be detachably connected to the first wall 10 by fasteners such as bolts and screws, or the support wall 30 can be snap-fitted to the first wall 10.

[0203] Optionally, a cavity is provided in the support wall 30 , that is, the support wall 30 is made into a non-solid structure, which is beneficial to reducing the weight and cost of the battery device 100 .

[0204] See also Figures 6 to 10 In some embodiments, along the second direction Y, the side surface of the first wall 10 facing the accommodating cavity 11 is recessed inward to form a first recess 12, and the side of the support wall 30 facing the first recess 12 is provided with a third protrusion 301, and the third protrusion 301 is engaged with the first recess 12.

[0205] Specifically, the first walls 10 arranged in pairs are each provided with a first recess 12 , and both sides of the support wall 30 along the second direction Y are each provided with a third protrusion 301 that can be engaged with the first recess 12 .

[0206] By configuring in the above manner, it is convenient to assemble the first wall 10 and the support wall 30 , which is beneficial to improving the assembly efficiency. Moreover, the third protrusion 301 extends into the first recess 12 to realize the snap connection between the first wall 10 and the support wall 30 , which is also beneficial to make the assembly of the two more compact, which is beneficial to improving the structural compactness of the battery device 100 .

[0207] like Figure 8 and Figure 12 As shown, in some embodiments, the battery device 100 further includes an adapter 5, the thermal management component 2 has a through hole 2201, and the adapter 5 extends into the first recess 12, the third protrusion 301 and the through hole 2201 in sequence along the first direction X, and connects the first wall 10, the support wall 30 and the thermal management component 2.

[0208] By providing the adapter 5 to connect the first wall 10 , the support wall 30 and the thermal management assembly 2 , the connection stability of the battery device 100 can be further enhanced.

[0209] Optionally, the heat exchange element 21 may be provided with a through hole 2201 , or the connector 22 may be provided with a through hole 2201 , or the heat exchange element 21 may be provided with a portion of the through hole 2201 and the connector 22 may be provided with another portion of the through hole 2201 .

[0210] like Figure 6 As shown, illustratively, the connecting member 22 is provided with a through hole 2201 , and the first connecting portion 221 is provided with a portion of the through hole 2201 , and the second connecting portion 222 is provided with another portion of the through hole 2201 .

[0211] Optionally, the adapter 5 may include but is not limited to any one of a long bolt, a long screw, a long stud, etc.

[0212] like Figure 8 and Figure 11 As shown, in some embodiments, along the first direction X, the surface of one side of the first wall 10 facing away from the heat exchanger 21 is recessed inward to form a second recess 13, the first recess 12 and the second recess 13 are spaced apart, and the adapter 5 extends into the second recess 13, the first recess 12, the third protrusion 301 and the through hole 2201 in sequence along the first direction X.

[0213] The provision of the second recess 13 not only provides an additional support point for the adapter 5 , but also enhances the connection strength between the first wall 10 and the adapter 5 .

[0214] By configuring in the manner described above, the adapter 5 can extend from the second recess 13 into the first recess 12, the third protrusion 301, and the via 2201 to connect the first wall 10, the support wall 30, and the thermal management assembly 2. This facilitates assembly of the adapter 5 and also makes the connection between the internal components of the battery device 100 more stable and reliable, further improving the overall performance and reliability of the battery device 100.

[0215] See also Figure 7 and Figure 13 In some embodiments, along the first direction X, a surface of the adapter 5 facing away from the heat exchange element 21 is located in the second recess 13 .

[0216] It can be understood that, in the first direction X, the side surface of the adapter 5 facing away from the heat exchanger 21 can be arranged flush with the side surface of the first wall 10 facing away from the heat exchanger 21, or, the side surface of the adapter 5 facing away from the heat exchanger 21 can also be lower than the side surface of the first wall 10 facing away from the heat exchanger 21, so as to avoid the adapter 5 protruding from the second recess 13 and interfering with other components, which is beneficial to improving the service life of the adapter 5, thereby helping to improve the connection strength between the adapter 5 and the first wall 10, and can also make the adapter 5 and the first wall 10 more compact, which is beneficial to improving the structural compactness of the battery device 100.

[0217] According to some embodiments of the present application, the present application further provides an electrical device, including the battery device 100 provided in any of the above embodiments, and the battery device 100 is used to store electrical energy or provide electrical energy.

[0218] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0219] Please also refer to Figures 3 to 13 According to some embodiments of the present application, the present application provides a battery device 100, including a battery assembly 1, a thermal management assembly 2, a first adhesive layer, a second wall 3, a second adhesive layer, a limiter 4, and a adapter 5, wherein the first direction X is the direction of gravity, that is, the height direction of the battery device 100, the second direction Y is the width direction of the battery device 100, and the third direction Z is the length direction of the battery device 100.

[0220] There are two battery assemblies 1, and the two battery assemblies 1 are arranged along the first direction X. Each battery assembly 1 includes a support wall 30, a plurality of battery cells 20 and a first wall 10 arranged in pairs. The first walls 10 arranged in pairs are spaced apart along the second direction Y. The space between the first walls 10 arranged in pairs forms a accommodating cavity 11. The support wall 30 is arranged in the accommodating cavity 11 and is connected between the first walls 10 arranged in pairs along the second direction Y. The support wall 30 divides the accommodating cavity 11 into sub-cavities 101 arranged along the third direction Z. Each sub-cavity 101 is provided with a plurality of battery cells 20 arranged along the second direction Y.

[0221] The battery cell 20 has a first surface 2001 that is opposite in a first direction X, a second surface that is opposite in a second direction Y, and a third surface 2003 that is opposite in a third direction Z. The area of ​​the second surface is larger than that of the first surface 2001, and the area of ​​the second surface is larger than that of the third surface 2003. The battery cell 20 includes an electrode terminal 204 and a pressure relief mechanism 203. The electrode terminal 204 and the pressure relief mechanism 203 are both disposed on the same side of the battery cell 20 along the third direction Z.

[0222] Along the first direction X, the side surface of the first wall 10 facing away from the heat exchanger 21 is recessed inward to form a second recess 13. Along the second direction Y, the side surface of the first wall 10 facing the accommodating cavity 11 is recessed inward to form a first recess 12, and the support wall 30 is provided with a third convex portion 301 on the side facing the first recess 12. The first recess 12 and the second recess 13 are spaced apart. The connecting member 22 has a through hole 2201, and the third convex portion 301 extends into the first recess 12. The adapter 5 extends into the second recess 13, the first recess 12, the third convex portion 301 and the through hole 2201 in sequence along the first direction X, and connects the first wall 10, the support wall 30 and the thermal management component 2. Along the first direction X, the side surface of the adapter 5 facing away from the heat exchanger 21 is located in the second recess 13.

[0223] The thermal management assembly 2 includes a heat exchanger 21 and a connector 22. The heat exchanger 21 is positioned between two adjacent battery assemblies 1 along a first direction X. A first adhesive layer is provided between the opposing surfaces of the battery cells 20 and the heat exchanger 21 along the first direction X, bonding the battery cells 20 and the heat exchanger 21 together via the first adhesive layer. The heat exchanger 21 is configured to exchange heat with the battery cells 20. The heat exchanger 21 has a medium flow channel, and an inlet and an outlet, respectively, connected to the medium flow channel. The medium flow channel is configured to allow the flow of heat exchange medium, and both the inlet and outlet are located on the same side of the heat exchanger 21 along a third direction Z. The heat exchange element 21 is connected to connecting parts 22 on both sides along the second direction Y. The connecting part 22 includes a first connecting part 221 and a second connecting part 222. Along the second direction Y, the first connecting part 221 is connected between the second connecting part 222 and the heat exchange element 21. The second connecting part 222 protrudes from the first connecting part 221 on both sides along the first direction X. The first wall 10 is connected to the second connecting part 222 on the side facing away from the accommodating cavity 11 along the second direction Y, and the first wall 10 is connected to the first connecting part 221 on one side along the first direction X.

[0224] Along the first direction X, a second wall 3 is provided on the side of the battery assembly 1 at the bottom end facing away from the heat exchanger 21. The second wall 3 includes a wall body 31 and a first protrusion 32. The first protrusion 32 is connected to both sides of the wall body 31 along the second direction Y. Along the first direction X, the first protrusion 32 protrudes from the wall body 31 toward the connector 22 and is removably connected to the side surface of the first wall 10 facing away from the accommodating cavity 11 along the second direction Y. Along the first direction X, a second adhesive layer is provided between the surfaces of the battery cell 20 and the wall body 31 facing each other, and the battery cell 20 and the wall body 31 are bonded together by the second adhesive layer.

[0225] Along the first direction X, a stopper 4 is provided on the side of the battery assembly 1 at the top facing away from the second wall 3. There are multiple stoppers 4, and the stoppers 4 are spaced apart along the third direction Z. The stopper 4 includes a main body 41 and a second protrusion 42. The second protrusion 42 is connected to both sides of the main body 41 along the second direction Y. Along the first direction X, the second protrusion 42 protrudes from the main body 41 toward the side of the first wall 10 and is detachably connected to the surface of the first wall 10 along the second direction Y facing away from the accommodating cavity 11.

[0226] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that: include: A battery assembly, wherein the number of the battery assemblies is multiple, and the multiple battery assemblies are arranged along a first direction, each battery assembly includes a battery cell and a pair of first walls, the paired first walls are spaced apart along a second direction, and the space between the paired first walls forms an accommodating cavity, and the battery cell is disposed in the accommodating cavity; A thermal management component includes a heat exchanger and a connector. The heat exchanger is provided between two adjacent battery assemblies along the first direction. The heat exchanger is configured to exchange heat with the battery cells. The heat exchanger is connected to the connector on at least one side along the second direction, and the connector is connected to the first wall. The first direction intersects with the second direction.

2. The battery device according to claim 1, wherein: At least one side of the connecting member along the first direction protrudes from the heat exchange member, and at least one side of the first wall along the second direction facing away from the accommodating cavity is provided with at least a portion of the connecting member.

3. The battery device according to claim 2, characterized in that The connecting member includes a first connecting portion and a second connecting portion. Along the second direction, the first connecting portion is connected between the second connecting portion and the heat exchange member. The second connecting portion protrudes from the first connecting portion on at least one side along the first direction, and the second connecting portion is provided on a side of at least one first wall facing away from the accommodating cavity along the second direction, and is connected to the first connecting portion along the first direction.

4. The battery device according to any one of claims 1 to 3, characterized in that: The heat exchange element has a medium flow channel and an inlet and an outlet respectively connected to the medium flow channel. The medium flow channel is configured to allow heat exchange medium to flow. The inlet is arranged on either side of the heat exchange element along the third direction, and the outlet is arranged on either side of the heat exchange element along the third direction. The first direction, the second direction and the third direction intersect with each other.

5. The battery device according to any one of claims 1 to 3, characterized in that: The battery cell has a first surface opposite to the first direction, a second surface opposite to the second direction, and a third surface opposite to the third direction. The area of ​​the second surface is greater than the area of ​​the first surface, and the area of ​​the second surface is greater than the area of ​​the third surface. The first direction, the second direction, and the third direction intersect with each other.

6. The battery device according to any one of claims 1 to 3, characterized in that: The battery cell further includes an electrode terminal provided on at least one side along a third direction, and / or the battery cell further includes a pressure relief mechanism provided on at least one side along the third direction; the first direction, the second direction and the third direction intersect with each other.

7. The battery device according to any one of claims 1 to 3, characterized in that: The battery device further includes a first adhesive layer. Along the first direction, the first adhesive layer is provided between the surfaces of the battery cell and the heat exchange element facing each other. The battery cell and the heat exchange element are bonded together via the first adhesive layer.

8. The battery device according to any one of claims 1 to 3, characterized in that: The battery device further includes a second wall. Along the first direction, the second wall is provided on the side of one of the outermost battery assemblies facing away from the heat exchanger. The second wall is respectively connected to the paired first walls.

9. The battery device according to claim 8, characterized in that The battery device further includes a second adhesive layer. Along the first direction, the second adhesive layer is provided between the battery cell and the second wall, surfaces facing each other. The battery cell and the second wall are bonded together via the second adhesive layer.

10. The battery device according to claim 8, characterized in that The second wall is detachably connected to the first wall.

11. The battery device according to claim 8, characterized in that The second wall includes a wall body and a first protrusion, and the first protrusion is connected to at least one side of the wall body along the second direction. Along the first direction, the first protrusion protrudes from the wall body toward the side where the first wall is located, and is connected to the side surface of the first wall along the second direction facing away from the accommodating cavity.

12. The battery device according to claim 8, wherein: The battery device further includes a limiting member, which is provided on a side of the other battery assembly located at the outermost side facing away from the second wall along the first direction, and is respectively connected to the first walls arranged in pairs.

13. The battery device according to claim 12, wherein: The first direction is the direction of gravity, the second wall is located at the bottom end of the battery assembly along the first direction, and the limiting member is located at the top end of the battery assembly along the first direction.

14. The battery device according to claim 12, wherein: There are multiple limiting members, and the multiple limiting members are spaced apart along the third direction. The first direction, the second direction, and the third direction intersect with each other.

15. The battery device according to claim 12, wherein: The limiting member is detachably connected to the first wall.

16. The battery device according to claim 12, wherein: The limiting member includes a main body and a second protrusion, and the second protrusion is connected to at least one side of the main body along the second direction. Along the first direction, the second protrusion protrudes from the main body toward the connecting member and is connected to the side surface of the first wall along the second direction facing away from the accommodating cavity.

17. The battery device according to any one of claims 1 to 3, characterized in that: The battery assembly also includes a support wall, which is arranged in the accommodating cavity and connected between the first walls arranged in pairs. The support wall divides the accommodating cavity into sub-cavities arranged along a third direction, each sub-cavity is provided with a battery cell, and the first direction, the second direction and the third direction intersect with each other.

18. The battery device according to claim 17, characterized in that Along the second direction, a surface of one side of the first wall facing the accommodating cavity is recessed inward to form a first recess, and a third protrusion is provided on a side of the support wall facing the first recess, and the third protrusion is engaged with the first recess.

19. The battery device according to claim 18, wherein: The battery device further includes a transition piece, the thermal management component has a through hole, the transition piece extends into the first recess, the third protrusion, and the through hole in sequence along the first direction, and connects the first wall, the support wall, and the thermal management component.

20. The battery device according to claim 19, wherein: Along the first direction, the surface of the first wall on one side facing away from the heat exchanger is recessed inward to form a second recess, the first recess and the second recess are spaced apart, and the adapter extends into the second recess, the first recess, the third protrusion and the through hole in sequence along the first direction.

21. The battery device according to claim 20, characterized in that Along the first direction, a surface of the adapter facing away from the heat exchange element is located in the second recess.

22. An electrical device, characterized in that: The battery device comprises a battery device according to any one of claims 1 to 21, wherein the battery device is used to store electrical energy or provide electrical energy.

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