Battery devices, energy storage devices and power consumption devices

Abstract

The present application relates to the field of battery technology and discloses a battery device, an energy storage device, and an electrical device. The battery device includes a battery cell and a heat dissipation assembly. The heat dissipation assembly includes a plurality of heat dissipating elements spaced apart along a first direction. The battery cell is disposed between two adjacent heat dissipating elements. A heat dissipation space is defined between each heat dissipating element and its adjacent battery cell. The heat dissipation space has an inlet in a second direction and an outlet in a third direction. Airflow is adapted to flow from the inlet into the heat dissipation space and out through the outlet. The first direction, the second direction, and the third direction intersect with each other. This allows airflow entering the heat dissipation space to directly and fully contact the battery cell, thereby improving the heat exchange efficiency between the heat dissipation assembly and the battery cell to a certain extent, thereby ensuring temperature balance within the battery cell, avoiding local overheating of the battery cell, and improving the safety and operating performance of the battery device.

Description

Technical Field

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

[0002] With the development of technology, the application range of battery cells is becoming more and more extensive.

[0003] Among them, the battery cells will generate heat during the charging and discharging process, causing the temperature of the battery cells to rise. However, the increase in the temperature of the battery cells will affect many characteristic parameters of the battery cells, such as internal resistance, voltage, available capacity and charging and discharging efficiency, thereby affecting the safety and working performance of the battery cells.

[0004] Currently, heat dissipation components are generally used to dissipate heat from battery cells to ensure the safety and working performance of the battery cells.

[0005] However, the heat exchange efficiency of the heat dissipation assembly and the battery cell in the prior art is low, resulting in excessively high local temperature of the battery cell, thereby causing poor safety and operating performance of the battery cell. Summary of the Invention

[0006] The embodiments of the present application provide a battery device, an energy storage device, and an electrical device, which can, to a certain extent, improve the heat exchange efficiency between the heat dissipation component and the battery cell, avoid temperature imbalance inside the battery cell, and further avoid the problem of local overheating of the battery cell, thereby ensuring the safety and working performance of the battery device to a certain extent.

[0007] In a first aspect, an embodiment of the present application provides a battery device comprising: a battery cell; a heat dissipation assembly, wherein the heat dissipation assembly comprises a plurality of heat dissipating elements arranged at intervals along a first direction, the battery cell being arranged between two adjacent heat dissipating elements, a heat dissipation space being defined between each heat dissipating element and its adjacent battery cell, the heat dissipation space being provided with an inlet in a second direction and an outlet in a third direction, an air flow being adapted to flow from the inlet to the heat dissipation space and out through the outlet, and the first direction, the second direction and the third direction intersecting in pairs.

[0008] In the above technical solution, an inlet is provided in the second direction of the heat dissipation space and an outlet is provided in the third direction, so that the inlet and the outlet are located in different directions of the heat dissipation space. In this way, when the airflow flows from the inlet to the heat dissipation space and flows out through the outlet, the airflow can fully contact the battery cell, which can improve the heat exchange efficiency between the heat dissipation component and the battery cell to a certain extent, and at the same time ensure the internal temperature balance of the battery cell, avoid the problem of local overheating of the battery cell, and further improve the cooling effect of the heat dissipation component, thereby ensuring the safety and working performance of the battery device to a certain extent.

[0009] In some embodiments, a guide component is provided in at least one of the heat dissipation spaces corresponding to each of the battery cells. The guide component defines a guide channel, and the guide channel is used to guide the airflow from the inlet to the outlet.

[0010] In the above technical solution, the airflow can flow from the inlet to the heat dissipation space and then effectively flow out through the outlet, so that the airflow can directly and evenly dissipate heat to the entire large surface of the battery cell, thereby improving the heat exchange efficiency between the heat dissipation component and the battery cell, and further to a certain extent, the heat exchange efficiency between the heat dissipation component and the battery cell, thereby ensuring the safety and working performance of the battery device to a certain extent.

[0011] In some embodiments, the guide assembly includes a protrusion protruding from the heat dissipation element, and the protrusion contacts the battery cell to define the guide channel.

[0012] In the above technical solution, the difficulty of forming the guide channel can be reduced to a certain extent, so as to facilitate the processing of the guide channel. At the same time, the guide channel can provide guidance for the airflow, so that the airflow can effectively flow out through the outlet, so that the airflow can be evenly distributed over the entire large surface of the battery cell.

[0013] In some embodiments, in the third direction, the outlets are provided on both sides of the heat dissipation space, and at least one guide channel is provided between each outlet and the inlet.

[0014] In the above technical solution, by arranging outlets on both sides of the third direction of the heat dissipation space, the airflow in the heat dissipation space can flow in different directions respectively, thereby increasing the contact area between the airflow and the battery cell, improving the heat exchange efficiency between the heat dissipation component and the battery cell to a certain extent, making the internal temperature of the battery cell balanced, avoiding the problem of local overheating of the battery cell, and thus improving the safety and working performance of the battery device.

[0015] In some embodiments, a plurality of the guide channels arranged along the second direction are provided between each of the outlets and the inlet.

[0016] In the above technical solution, multiple guide channels can be used to guide the airflow in the heat dissipation space, thereby improving the heat exchange efficiency of the heat dissipation element and the battery cell to a certain extent.

[0017] In some embodiments, a guide plate is provided at the inlet, and the guide plate is used to guide the airflow to flow toward the inlet.

[0018] In the above technical solution, the external air flow can smoothly flow into the heat dissipation space through the inlet.

[0019] In some embodiments, the guide plate extends obliquely relative to the battery cell.

[0020] In the above technical solution, by setting up an inclined and extended guide plate, more airflow can be allowed to enter the heat dissipation space through the inlet, and the guide plate can also be used to protect the battery cells, to a certain extent preventing foreign matter from contacting the battery cells through the inlet, which is beneficial to extending the service life of the battery cells and improving the safety of battery cells.

[0021] In some embodiments, the heat sink includes a heat sink body and a first connecting portion, the heat sink body and the battery cell define the heat dissipation space, the first connecting portion is provided at at least one end of the heat sink body in the third direction, and the first connecting portion is used to achieve the mating connection between two adjacent heat sinks.

[0022] In the above technical solution, not only the difficulty of forming the heat dissipation space can be reduced, but also the difficulty of matching and connecting two adjacent heat dissipation parts can be reduced, thereby reducing the difficulty of assembling the heat dissipation component, so as to facilitate the use of the heat dissipation component to dissipate heat from the battery cell and improve the overall performance and life of the battery cell.

[0023] In some embodiments, the heat sink also includes a second connection portion, and the second connection portion and the first connection portion are arranged at the same end of the heat sink body in the third direction. The second connection portion and the first connection portion are arranged along the first direction. In the third direction, the first connection portion protrudes from the second connection portion. In two adjacent heat sinks, the first connection portion on one of the heat sinks is limitedly engaged with the second connection portion of the other heat sink.

[0024] In the above technical solution, two adjacent heat sinks can be connected through the first connecting portion, thereby realizing the connection of multiple heat sinks. Multiple heat sinks form a heat sink assembly, which can ensure the structural stability of the heat sink assembly to a certain extent, thereby ensuring the working performance of the heat sink assembly to a certain extent.

[0025] In some embodiments, in the third direction, at least a portion of the second connecting portion is arranged opposite the battery cell, and the second connecting portion and the battery cell are spaced apart to define a discharge channel, and the discharge channel is connected to the heat dissipation space through the outlet, and the discharge channel is provided with a discharge outlet on at least one end of the second direction.

[0026] In the above technical solution, it is beneficial to utilize the exhaust channel to dissipate heat from the side surfaces of the battery cell, so that the heat dissipation component can dissipate heat from multiple sides of the battery cell at the same time, which can improve the heat dissipation efficiency of the heat dissipation component to a certain extent, thereby ensuring the safety and working performance of the battery device.

[0027] In some embodiments, at least part of the heat dissipation body is further provided with a guide protrusion and a guide groove on at least one end in the third direction, and the guide protrusion and the guide groove are arranged in sequence along the first direction. Among the two adjacent heat dissipation elements, the guide protrusion on one of the heat dissipation elements is guided and fitted into the guide groove of the other heat dissipation element.

[0028] In the above technical solution, the relative positions of two adjacent heat sinks during installation and matching are accurate, and thus the relative positions of multiple heat sinks during installation and matching are accurate, thereby ensuring the accuracy and stability of the entire heat sink assembly, and to a certain extent, ensuring the working performance of the heat sink assembly.

[0029] In some embodiments, the guide protrusion and the first connecting portion are provided at the same end of the heat dissipation body and are arranged in sequence along the second direction. In the first direction, an extension direction of the guide protrusion is opposite to an extension direction of the first connecting portion.

[0030] In the above technical solution, by setting the extension direction of the guide protrusion to be opposite to the extension direction of the first connecting portion, among the three heat sinks, the middle heat sink can be simultaneously connected to the two adjacent heat sinks, so that multiple adjacent heat sinks can be connected to each other, which is convenient for forming the entire structure of the heat sink assembly and can improve the structural stability of the heat sink assembly.

[0031] In some embodiments, a buffer is provided between the protrusion and the battery cell.

[0032] In the above technical solution, it is possible to resist and buffer the external vibration and impact of the battery cells during use to a certain extent, thereby reducing the friction and collision between the battery cells and the heat sink, and further protecting the battery cells and the heat sink from damage, thereby improving the reliability and stability of the battery device.

[0033] In some embodiments, the multiple heat sinks include two first heat sinks and a second heat sink, the two first heat sinks are arranged at intervals in the first direction, the second heat sink is arranged between the two first heat sinks, and the side of each first heat sink facing the second heat sink cooperates with the battery cell to define the heat dissipation space, each second heat sink is provided with the battery cell on both sides of the first direction, and the heat dissipation space is defined between each second heat sink and the battery cell on at least one side.

[0034] In the above technical solution, one battery cell can correspond to two heat sinks at the same time, which can improve the heat exchange efficiency between the battery cell and the heat sink to a certain extent. At the same time, the first heat sink and the second heat sink can be used to protect the battery cell from external impact, which can ensure the working performance of the battery cell to a certain extent.

[0035] In some embodiments, the battery device further includes an output stage base, the output stage base being used to support an output stage circuit electrically connected to the battery cell, and the output stage base and the first heat sink are integrally formed.

[0036] In the above technical solution, on the one hand, the number of molds used in the production of the output stage base and the first heat sink can be reduced, thereby reducing the production and transportation costs of the output stage base and the first heat sink; on the other hand, the integration of the output stage base and the first heat sink can be improved, thereby improving the assembly efficiency and structural stability of the battery device to a certain extent.

[0037] In some embodiments, the battery device also includes a shell, the interior of the shell is hollow, the battery cell and the heat dissipation assembly are both arranged in the shell, and an elastic fin is provided on the side of the first heat dissipation member facing away from the second heat dissipation member. The elastic fin protrudes toward the shell and is abutted against the shell. The elastic fin is used to absorb the stress generated by the expansion of the battery cell.

[0038] In the above technical solution, by arranging both the battery cell and the heat dissipation assembly in the outer casing, while facilitating the formation of the battery device, the outer casing can also be used to support and protect the battery cell and the heat dissipation assembly, thereby preventing the battery cell and the heat dissipation assembly from being damaged by external forces such as collision, extrusion or vibration during transportation, installation and use to a certain extent, thereby ensuring the working performance of the battery cell and the heat dissipation assembly; by arranging elastic fins to absorb the stress generated by the expansion of the battery cell, the battery cell can be prevented from deformation or rupture, thereby extending the service life of the battery cell.

[0039] In some embodiments, in the protruding direction of the elastic fin, the elastic fin extends obliquely relative to the housing.

[0040] In the above technical solution, the elastic fins can effectively absorb the stress generated by the expansion of the battery cells, thereby ensuring the working performance of the elastic fins to a certain extent.

[0041] In some embodiments, in the first direction, a protrusion is provided on one side of the second heat dissipation member, and the protrusion contacts the battery cell to define a guide channel. The other side of the second heat dissipation member defines an installation space, and a mating member is provided in the installation space, and the mating member cooperates with the battery cell on the corresponding side to position the battery cell.

[0042] In the above technical solution, the second heat sink can be used to fix the battery cell, which can prevent the battery cell from displacement or shaking under external force to a certain extent, thereby enabling the battery cell to maintain a certain position stability, thereby ensuring the working performance of the battery cell.

[0043] In some embodiments, the second heat dissipation member includes a heat dissipation body and a mounting side wall, the heat dissipation body is provided with the protrusion on one side of the first direction, the mounting side wall includes a second connecting portion, at least part of the mounting side wall is provided on the other side of the heat dissipation body in the first direction, the mounting side wall cooperates with the heat dissipation body to define the mounting space, and the mating member is provided on the side of the mounting side wall facing the mounting space.

[0044] In the above technical solution, the mounting side wall can be used to support the fitting, thereby improving the positional stability of the fitting, thereby facilitating the use of the fitting to fix the battery cell, thereby improving the positional stability of the battery cell.

[0045] In some embodiments, there are a plurality of fittings, each of which is an elastic sheet installed in the installation space, and the plurality of elastic sheets abut against and fit with different side walls of the battery cell to position the battery cell.

[0046] In the above technical solution, by setting the fitting as an elastic sheet, the fitting can be deformed under the action of external force and can restore its original shape after the external force disappears, so that it is convenient to use the fitting to fix the battery cell; by setting multiple fittings and setting the multiple fittings to be abutted against different side walls of the battery cell, it is convenient to use the fitting to fix multiple side walls of the battery cell, thereby maximizing the position stability of the battery cell.

[0047] In a second aspect, an embodiment of the present application provides an energy storage device, comprising the aforementioned battery device, wherein the battery device is used to store or provide electrical energy.

[0048] In the above technical solution, by adopting the aforementioned battery device, the safety of the energy storage device can be improved to a certain extent, and the service life of the energy storage device can be extended.

[0049] In a third aspect, an embodiment of the present application provides an electrical device, comprising the aforementioned battery device or the aforementioned energy storage device, wherein the battery device is used to store or provide electrical energy.

[0050] In the above technical solution, by adopting the aforementioned battery device or energy storage device, while ensuring the working performance of the electrical device, the safety of the electrical device can be improved and the service life of the electrical device can be extended.

[0051] Additional aspects and advantages of the present application will become apparent from the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] 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. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 Schematic diagram of an electrical device according to some embodiments of the present application.

[0054] Figure 2 Schematic diagram of a battery device according to some embodiments of the present application.

[0055] Figure 3 FIG. 4 is an exploded view of a partial structure of a battery device according to some embodiments of the present application.

[0056] Figure 4 This is a schematic diagram of the first heat dissipation element and the second heat dissipation element when they cooperate with each other according to some embodiments of the present application.

[0057] Figure 5 for Figure 4 Schematic diagram from another angle.

[0058] Figure 6 for Figure 4 side view.

[0059] Figure 7 for Figure 4 Top view of .

[0060] Figure 8 Schematic diagram of a first heat dissipation element according to some embodiments of the present application.

[0061] Figure 9 for Figure 8 Schematic diagram from another angle.

[0062] Figure 10 for Figure 9 Top view of .

[0063] Figure 11 for Figure 9 side view.

[0064] Figure 12 for Figure 9 Front view of .

[0065] Figure 13 Schematic diagram of a second heat dissipation element according to some embodiments of the present application.

[0066] Figure 14 for Figure 13 Schematic diagram from another angle.

[0067] Figure 15 for Figure 13 Front view of .

[0068] Reference numerals:

[0069] 2000, electrical device; 1000, battery device; 100, battery cell; 200, heat dissipation assembly; 210, heat dissipation element; 2112, outlet; 2113, guide assembly; 21131, protrusion; 2114, guide plate; 2115, guide channel; 212, heat dissipation body; 2121, second connecting portion; 2122, guide protrusion; 2123, guide groove; 213, first connecting portion; 214, first heat dissipation element; 215, second heat dissipation element; 2151, matching member; 2152, installation space; 216, supporting bottom wall; 217, installation side wall; 300, buffer member; 400, output stage base; 500, elastic fin; 3000, energy storage device; 600, case; 610, upper case; 620, lower case; 1200, controller; 1300, motor. DETAILED DESCRIPTION

[0070] 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.

[0071] 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.

[0072] 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] The term "plurality" used in this application refers to more than two, including two.

[0077] Currently, market developments indicate that battery cells are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace applications.

[0078] As the application areas of battery cells continue to expand, the market demand is also increasing.

[0079] The battery cells referred to herein may be lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, and are not limited to these in the present application. Furthermore, the battery cells may be cylindrical, flat, rectangular, or in other shapes, and are not limited to these in the present application. Battery cells are generally categorized into three types based on packaging: cylindrical, prismatic, and soft-pack battery cells, and are not limited to these in the present application.

[0080] It is worth noting that battery cells will generate heat during the charging and discharging process, causing the temperature of the battery cells to rise. However, the increase in battery cell temperature will affect many characteristic parameters of the battery cells, such as internal resistance, voltage, available capacity and charging and discharging efficiency, thereby affecting the safety and working performance of the battery cells.

[0081] Currently, heat dissipation components are generally used to dissipate heat from battery cells to ensure the safety and working performance of the battery cells.

[0082] The applicant found that in the related art, the flow path of the airflow after entering the heat dissipation space is short, resulting in a short residence time of the airflow in the heat dissipation component, thereby affecting the heat dissipation performance of the heat dissipation component.

[0083] To solve the above problems, combined with Figure 3-Figure 15 As shown, an embodiment of the present application provides a battery device 1000, which is provided with an inlet in the second direction of the heat dissipation space and an outlet 2112 in the third direction, so that the inlet and the outlet 2112 are respectively located in different directions of the heat dissipation space. In this way, when the airflow entering the heat dissipation space through the inlet flows toward the outlet 2112, the extension path and flow time of the airflow in the heat dissipation space can be increased, thereby facilitating the use of the airflow to dissipate heat for the battery cell 100, and to a certain extent, can improve the heat exchange efficiency between the heat dissipation component 200 and the battery cell 100, ensure the internal temperature balance of the battery cell 100, avoid the problem of local overheating of the battery cell 100, and further improve the heat dissipation effect of the heat dissipation component 200, thereby ensuring the safety and working performance of the battery device 1000.

[0084] The embodiment of the present application further provides an energy storage device 3000 including the above-mentioned battery device 1000. The battery device 1000 is used to store or provide electrical energy so as to provide electrical energy to the energy storage device 3000, thereby ensuring the working performance of the energy storage device 3000 to a certain extent.

[0085] In some embodiments, as Figure 2As shown, the energy storage device 3000 refers to a single physical module that includes multiple battery devices 1000 to provide higher voltage and capacity. For example, the energy storage device 3000 mentioned in this application may include one or more battery devices 1000 to provide voltage and capacity.

[0086] In some embodiments, the battery device 1000 may include a plurality of battery cells 100 , and the plurality of battery cells 100 are connected in series, in parallel, or in series-parallel connection via a busbar.

[0087] In some embodiments, the battery device 1000 is typically formed by arranging multiple battery cells 100. For example, the battery device 1000 may be a battery module, which is formed by arranging and fixing multiple battery cells 100 to form a single module. For example, the battery module may be formed by bundling multiple battery cells 100 with a cable tie.

[0088] In some embodiments, as Figure 2 As shown, the energy storage device 3000 generally includes a box 600 for encapsulating one or more battery devices 1000. The box 600 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 100 to a certain extent; of course, the energy storage device 3000 may also not include the box 600.

[0089] In some embodiments, as Figure 2 As shown, the battery device 1000 is disposed in the box 600. The box 600 is used to support and protect the battery device 1000, thereby improving the structural stability of the battery device 1000, extending the service life of the battery device 1000, and improving the safety of the battery device 1000.

[0090] The box body 600 may adopt various structures.

[0091] In some embodiments, as Figure 2 As shown, the box body 600 may include an upper box body 610 and a lower box body 620, and the upper box body 610 and the lower box body 620 cover each other. The upper box body 610 and the lower box body 620 jointly define a cavity for accommodating the battery device 1000, so as to reduce the difficulty of molding the box body 600, thereby facilitating the placement of the battery device 1000 in the box body 600.

[0092] The upper box body 610 may be a hollow structure with one end open, and the lower box body 620 may be a plate-shaped structure, and the lower box body 620 covers the open side of the upper box body 610 (not shown in the example figure), so that the upper box body 610 and the lower box body 620 jointly define a cavity; or, the lower box body 620 may be a hollow structure with one end open, and the upper box body 610 may be a plate-shaped structure (not shown in the example figure), and the upper box body 610 covers the open side of the lower box body 620, so that the upper box body 610 and the lower box body 620 can also jointly define a cavity; or, as Figure 2 As shown, the upper box body 610 and the lower box body 620 are both hollow structures with one side open, and the open side of the upper box body 610 covers the open side of the lower box body 620 to define a cavity.

[0093] It should be noted that the box body 600 formed by the upper box body 610 and the lower box body 620 can be in various shapes, such as cylinder, cube or cuboid; the battery cell 100 can be in various shapes, such as cylinder, square and so on.

[0094] The embodiment of the present application further provides an electric device 2000 (such as Figure 1 As shown in FIG, the battery device 1000 is used to store or provide electrical energy so as to provide electrical energy to the electrical device 2000, thereby ensuring the working performance of the electrical device 2000 to a certain extent.

[0095] The electrical device 2000 mentioned here may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like.

[0096] Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.; spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0097] For the convenience of description, the following embodiments take the electric device 2000 as a vehicle as an example to introduce the structure of the electric device 2000 of the present application in detail.

[0098] Please refer to Figure 1 , Figure 1The power consumption device 2000 is shown as a vehicle. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. The vehicle is equipped with an energy storage device 3000, which can be located at the bottom, front, or rear of the vehicle. Energy storage device 3000 can be used to power the vehicle, for example, as the vehicle's operating power source.

[0099] In some embodiments, as Figure 1 As shown, the vehicle may further include a controller 1200 and a motor 1300 . The controller 1200 is used to control the battery device 1000 to supply power to the motor 1300 , for example, to meet the power requirements for starting, navigating, and driving the vehicle.

[0100] In some embodiments of the present application, the energy storage device 3000 can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0101] The battery device 1000 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0102] like Figure 3 As shown, the battery device 1000 includes a battery cell 100 and a heat dissipation assembly 200 .

[0103] Among them, the battery cell 100 is the basic component unit of the battery device 1000. The battery cell 100 converts chemical energy into electrical energy through chemical reactions inside the battery cell 100 for storage, and then releases the stored electrical energy when needed to provide power to the external circuit, thereby ensuring the working performance of the battery device 1000 to a certain extent.

[0104] Combine Figure 3 and Figure 4 As shown, the heat dissipation assembly 200 includes a plurality of heat dissipation elements 210 arranged at intervals along the first direction, and the battery cells 100 are arranged between two adjacent heat dissipation elements 210. A heat dissipation space (not shown in the figure) is defined between each heat dissipation element 210 and its adjacent battery cells 100. The heat dissipation space is provided with an inlet in the second direction and an outlet 2112 in the third direction. The air flow is suitable for flowing from the inlet to the heat dissipation space and out through the outlet 2112. The first direction, the second direction and the third direction intersect with each other. It should be noted that the first direction mentioned above can be understood as Figure 3 The X direction shown in the second direction can be understood as Figure 3 The Z direction shown in the figure, the third direction can be understood as Figure 4In the Y direction shown in the figure, the heat dissipation assembly 200 is arranged to include multiple heat dissipation members 210 arranged at intervals along the first direction, and the battery cell 100 is arranged between two adjacent heat dissipation members 210, so that the battery cell 100 can be cooled by using multiple heat dissipation members 210 at the same time, thereby better controlling the temperature of the battery cell 100. At the same time, by arranging the battery cell 100 between two adjacent heat dissipation members 210 and defining a heat dissipation space between each heat dissipation member 210 and its adjacent battery cell 100, the temperature around the battery cell 100 can also be made more uniform. Each heat dissipation member 210 can dissipate heat to the battery cell 100 near it, thereby reducing the temperature difference between the battery cells 100, which is beneficial to improving the overall performance and life of the battery device 1000.

[0105] In addition, by setting an inlet in the second direction of the heat dissipation space and an outlet 2112 in the third direction of the heat dissipation space, the inlet and outlet 2112 are respectively located in different directions of the heat dissipation space. In this way, when the airflow entering the heat dissipation space through the inlet flows toward the outlet 2112, the extension path and flow time of the airflow in the heat dissipation space can be increased, thereby facilitating the use of the airflow to dissipate heat for the entire large surface of the battery cell 100, and to a certain extent, can improve the heat dissipation efficiency of the heat dissipation assembly 200, so that the internal temperature of the battery cell 100 is balanced, avoiding the problem of local overheating of the battery cell 100, and further can improve the cooling effect of the heat dissipation assembly 200, thereby ensuring the safety and working performance of the battery device 1000.

[0106] It should be noted that setting the inlet in the second direction of the heat dissipation space can avoid the inlet being restricted by the battery cell 100 structure, the mounting bracket and other surrounding components, and can increase the air intake area to a certain extent, ensuring sufficient air intake flow, thereby improving the heat exchange efficiency of the heat dissipation assembly 200 and the battery cell 100 to a certain extent.

[0107] It should also be noted that the heat sink 210 can play a certain supporting and fixing role for the battery cell 100. Placing the battery cell 100 between adjacent heat sinks 210 can make the structure of the battery cell 100 more stable. When the battery device 1000 is subjected to external forces such as vibration and impact, the heat sink 210 can help disperse stress to a certain extent and protect the battery cell 100 from damage, thereby improving the reliability and safety of the battery cell 100.

[0108] It is worth noting that since multiple heat sinks 210 are arranged at intervals along the first direction, the battery cell 100 is arranged between two adjacent heat sinks 210, so that the heat sink 210 and the battery cell 100 are arranged along the first direction. Therefore, the heat dissipation space formed between the heat sink 210 and the battery cell 100 mainly dissipates heat to the side walls of the battery cell 100 in the first direction, that is, to dissipate heat to the large surface of the battery cell 100.

[0109] As can be seen from the above structure, the battery device 1000 of the embodiment of the present application, by setting an inlet in the second direction of the heat dissipation space and an outlet 2112 in the third direction, can increase the extension path and flow time of the airflow in the heat dissipation space when the airflow enters the heat dissipation space through the inlet and flows toward the outlet 2112, thereby facilitating the use of the airflow to dissipate heat from the entire large surface of the battery cell 100, thereby improving the heat dissipation efficiency of the heat dissipation assembly 200, and at the same time ensuring the internal temperature balance of the battery cell 100, avoiding the problem of local overheating of the battery cell 100, and ensuring the safety and working performance of the battery device 1000 to a certain extent.

[0110] It can be understood that compared with the prior art, the present application sets an inlet in the second direction of the heat dissipation space and an outlet 2112 in the third direction, so that the inlet and outlet 2112 are respectively located in different directions of the heat dissipation space, thereby facilitating the increase of the extension path and flow time of the airflow in the heat dissipation space, and to a certain extent can improve the heat dissipation efficiency of the heat dissipation assembly 200, thereby improving the safety and working performance of the battery device 1000.

[0111] In some embodiments, as Figure 4 As shown, a guide assembly 2113 is provided within at least one heat dissipation space corresponding to each battery cell 100. The guide assembly 2113 defines a flow channel 2115, which is used to direct airflow from the inlet to the outlet 2112. This allows airflow from the inlet to the heat dissipation space to effectively flow out through the outlet 2112, allowing the airflow to directly and evenly dissipate heat across the entire surface of the battery cell 100. This improves the heat exchange efficiency between the heat dissipation element 210 and the battery cell 100, and further, to a certain extent, improves the heat exchange efficiency between the heat dissipation assembly 200 and the battery cell 100, thereby ensuring the safety and operating performance of the battery device 1000 to a certain extent.

[0112] In some embodiments, each battery cell 100 is provided with a guide assembly 2113 (not shown in this example figure) in the heat dissipation space corresponding to two opposite sides in the first direction. The guide assembly 2113 is used to guide the airflow to flow in a predetermined direction to improve the heat dissipation performance of the heat dissipation space.

[0113] In some embodiments, as Figure 4As shown, the guide assembly 2113 includes a protrusion 21131 protruding from the heat sink 210. The protrusion 21131 contacts the battery cell 100 to define a flow guide channel 2115. This can reduce the difficulty of forming the flow guide channel 2115 to a certain extent, making it easier to process the flow guide channel 2115. At the same time, the flow guide channel 2115 can provide guidance for the airflow, so that the airflow can be evenly distributed and circulated across the entire surface of the battery cell 100.

[0114] In some embodiments, as Figure 4 As shown, the guide assembly 2113 includes a plurality of protrusions 21131 , which protrude toward the battery cell 100 and abut against the battery cell 100 . A guide channel 2115 is defined between two adjacent protrusions 21131 to reduce the difficulty of forming the guide channel 2115 .

[0115] In some embodiments, combined Figure 4 and Figure 8 As shown, in the third direction, outlets 2112 are provided on both sides of the heat dissipation space, and at least one guide channel 2115 is provided between each outlet 2112 and the inlet. It can be understood here that the heat dissipation element 210 includes two outlets 2112, which are spaced apart at opposite ends of the heat dissipation element 210 in the third direction, so that the two outlets 2112 are arranged in different positions. This allows the airflow in the heat dissipation space to flow in different directions, thereby increasing the contact area between the airflow and the battery cell 100, improving the heat exchange efficiency between the heat dissipation assembly 200 and the battery cell 100 to a certain extent, and balancing the internal temperature of the battery cell 100, thereby avoiding the problem of local overheating of the battery cell 100, and thus improving the safety and operating performance of the battery device 1000.

[0116] It should be noted that at least one guide channel 2115 is provided between each outlet 2112 and the inlet, which means that one guide channel 2115 or multiple guide channels 2115 can be provided between each outlet 2112 and the inlet. The guide channel 2115 is used to provide guidance for the airflow so that it can continue to flow effectively in a predetermined direction, that is, the airflow can flow from the inlet to the heat dissipation space and out through the outlet 2112, thereby enabling the airflow to fully exchange heat with the battery cell 100, thereby avoiding the problem of local overheating of the battery cell 100.

[0117] In some embodiments, a plurality of guide channels 2115 arranged along the second direction are provided between each outlet 2112 and the inlet. This means that a plurality of guide channels 2115 are provided between each outlet 2112 and the inlet, and the plurality of guide channels 2115 are arranged along the second direction. The plurality of guide channels 2115 provide corresponding guidance for the airflow, allowing the battery cells 100 and the heat sink 210 to fully dissipate heat, thereby improving the heat exchange efficiency between the heat sink 210 and the battery cells 100 to a certain extent.

[0118] At the same time, since multiple guide channels 2115 are arranged along the second direction, the airflow can be distributed at multiple positions of the battery cell 100 in the second direction, so as to utilize the airflow to dissipate heat at multiple positions of the battery cell 100, further improving the heat dissipation effect of the heat dissipation assembly 200.

[0119] In a specific example, when the vehicle is driving, external air enters from the inlet, and is then diverted by multiple guide channels 2115 so that the airflow is directly and evenly distributed over the entire surface of the battery cell 100. After the battery cell 100 and the heat sink 210 have fully exchanged heat through the airflow, the airflow flows along the multiple guide channels 2115 to the outlet 2112, and the airflow is discharged from the outlet 2112.

[0120] In some embodiments, as Figure 4 As shown, a guide plate 2114 is provided at the inlet, and the guide plate 2114 is used to guide the airflow to the inlet, so that the external airflow can smoothly flow through the inlet into the heat dissipation space, thereby improving the heat dissipation effect of the heat dissipation assembly 200 to a certain extent.

[0121] In some embodiments, combined Figure 3 、 Figure 4 and Figure 6 As shown, the guide plate 2114 extends obliquely relative to the battery cell 100. While allowing more air to enter the heat dissipation space through the inlet, the guide plate 2114 can also protect the battery cell 100, preventing foreign matter from contacting the battery cell 100 through the inlet to a certain extent, which is beneficial to extending the service life of the battery cell 100 and improving the safety of the battery cell 100.

[0122] In some embodiments, the heat sink 210 is provided with side plates in the second direction, and at least a portion of the side plates extend obliquely relative to the battery cell 100 to form the guide plate 2114 , thereby reducing the difficulty of forming the guide plate 2114 .

[0123] In some embodiments, combined Figure 4-Figure 7As shown, the heat sink 210 includes a heat sink body 212 and a first connecting portion 213. A heat dissipation space is defined between the heat sink body 212 and the battery cell 100. The first connecting portion 213 is provided at at least one end of the heat sink body 212 in the third direction. The first connecting portion 213 is used to achieve a mating connection between two adjacent heat sinks 210. By configuring the heat sink 210 to include the heat sink body 212 and the first connecting portion 213, and by using the heat sink body 212 and the battery cell 100 to define a heat dissipation space, the heat sink 210 can dissipate heat from the battery cell 100, thereby ensuring temperature balance within the battery cell 100.

[0124] At the same time, by setting the first connecting portion 213 to be used to achieve the matching connection between two adjacent heat sinks 210, not only can the structural stability of the two adjacent heat sinks 210 be guaranteed to a certain extent, but the difficulty of connecting the two adjacent heat sinks 210 can also be reduced, thereby reducing the assembly difficulty of the heat dissipation component 200, so as to facilitate the use of the heat dissipation component 200 to dissipate heat for the battery cell 100, thereby improving the overall performance and life of the battery cell 100.

[0125] In some embodiments, as Figure 13 As shown, the heat dissipation body 212 is provided with first connection portions 213 at opposite ends in the third direction. The two first connection portions 213 cooperate to achieve the mating connection between two adjacent heat dissipation elements 210, thereby increasing the strength of the mating connection between the two adjacent heat dissipation elements 210 and improving the positional stability of the heat dissipation elements 210, thereby ensuring the working performance of the heat dissipation elements 210 to a certain extent.

[0126] In some embodiments, combined Figure 3 、 Figure 4 and Figure 13 As shown, the heat sink 210 further includes a second connection portion 2121. The second connection portion 2121 and the first connection portion 213 are disposed at the same end of the heat sink body 212 in the third direction. The second connection portion 2121 and the first connection portion 213 are aligned along the first direction. In the third direction, the first connection portion 213 protrudes from the second connection portion 2121. Among two adjacent heat sinks 210, the first connection portion 213 on one heat sink 210 is positionally engaged with the second connection portion 2121 of the other heat sink 210. This allows two adjacent heat sinks 210 to be connected via the first connection portion 213, thereby achieving a coordinated connection of multiple heat sinks 210. The multiple heat sinks 210 form a heat sink assembly 200, which can ensure the structural stability of the heat sink assembly 200 to a certain extent, thereby preventing the heat sink assembly 200 from shaking or displacement under external impact, thereby ensuring the operating performance of the heat sink assembly 200.

[0127] In some embodiments, combined Figure 3 、 Figure 4 、 Figure 13 and Figure 14 As shown, the first connection portion 213 and the second connection portion 2121 are connected to each other. This allows the first connection portion 213 and the second connection portion 2121 to cooperate and support each other, improves the positional stability of the first connection portion 213 and the second connection portion 2121, and ensures the working performance of the first connection portion 213 and the second connection portion 2121 to a certain extent, thereby facilitating the cooperative connection of the two heat sinks 210 using the first connection portion 213 and the second connection portion 2121.

[0128] In some embodiments, combined Figure 13 and Figure 14 As shown, the heat dissipation body 212 is provided with a first connection part 213 and a second connection part 2121 at both ends in the third direction. On the one hand, it is convenient to increase the structural strength of the heat dissipation element 210, and on the other hand, it is convenient to use the first connection part 213 and the second connection part 2121 to increase the matching connection strength of the two adjacent heat dissipation elements 210.

[0129] In some embodiments, combined Figure 13 and Figure 14 As shown, the first connection part 213 is connected to the second connection part 2121 and is arranged near one end of the second connection part 2121 in the first direction. In the third direction, the first connection part 213 protrudes from the second connection part 2121, so that the first connection part 213 is formed as a connecting convex part and the second connection part 2121 is formed as a connecting concave part, thereby facilitating the use of the first connection part 213 and the second connection part 2121 to achieve the matching connection of two adjacent heat sinks 210 and reduce the difficulty of forming the connecting convex part and the connecting concave part.

[0130] Optionally, in the third direction, at least a portion of the second connection portion 2121 is disposed directly opposite the battery cell 100, and a gap is formed between the second connection portion 2121 and the battery cell 100 to define a discharge channel. The discharge channel communicates with the heat dissipation space via the outlet 2112, and the discharge channel is provided with a discharge outlet at at least one end in the second direction. By defining the discharge channel and arranging the discharge channel to communicate with the heat dissipation space via the outlet 2112, airflow within the heat dissipation space can flow into the discharge channel through the outlet 2112. Because the discharge channel is defined by at least a portion of the second connection portion 2121 cooperating with the battery cell 100, and the second connection portion 2121 is connected to at least one end of the heat dissipation body 212 in the third direction, airflow can flow to the sidewalls of the battery cell 100 in the third direction, thereby facilitating heat dissipation from the sidewalls of the battery cell 100 in the third direction using the airflow, thereby enabling the heat dissipation assembly 200 to simultaneously dissipate heat from multiple sides of the battery cell 100, thereby improving the heat dissipation efficiency of the heat dissipation assembly 200 to a certain extent, thereby ensuring the safety and performance of the battery device 1000.

[0131] At the same time, by setting an exhaust port on at least one end of the second direction of the exhaust channel, the airflow in the exhaust channel can be discharged smoothly, so that the airflow in the heat dissipation space can be discharged smoothly, which is conducive to introducing new airflow into the heat dissipation space, realizing the circulation of airflow in the heat dissipation space, and improving the heat dissipation effect of the heat dissipation component 200.

[0132] In a specific example, the heat dissipation body 212 is provided with a second connection portion 2121 at both ends in the third direction, so that a discharge channel is formed at both ends of the battery cell 100 in the third direction, so that the heat dissipation component 200 can dissipate heat on at least three sides of the battery cell 100, thereby improving the heat dissipation efficiency of the heat dissipation component 200.

[0133] In some embodiments, combined Figure 3 、 Figure 4 and Figure 13 As shown, at least a portion of the heat dissipation body 212 is further provided with a guide protrusion 2122 and a guide groove 2123 on at least one end in the third direction. The guide protrusion 2122 and the guide groove 2123 are sequentially arranged along the first direction. Among two adjacent heat dissipation elements 210, the guide protrusion 2122 on one heat dissipation element 210 is guided and fitted within the guide groove 2123 of the other heat dissipation element 210. This ensures, to a certain extent, that the relative positions of the two adjacent heat dissipation elements 210 are accurate during installation and mating, thereby ensuring that the relative positions of multiple heat dissipation elements 210 are accurate during installation and mating, thereby ensuring the accuracy and stability of the entire heat dissipation assembly 200 and the operating performance of the heat dissipation assembly 200.

[0134] It should be noted that the matching connection between the guide protrusion 2122 and the guide groove 2123 usually has a certain guiding property. When assembling the heat dissipation component 200, it can guide multiple heat dissipation components 210 to be installed smoothly, which can reduce the assembly difficulty of the heat dissipation component 200 to a certain extent, and thus can improve the assembly efficiency of the heat dissipation component 200. At the same time, when the heat dissipation component 200 needs to be disassembled, the disassembly operation is also easy to perform, avoiding excessive damage to other components of the battery device 1000.

[0135] In some embodiments, combined Figure 3 、 Figure 4 and Figure 13 As shown, at least part of the heat dissipation body 212 is provided with a guide protrusion 2122 and a guide groove 2123 at both ends in the third direction, so that two adjacent heat dissipation elements 210 can be assembled accurately.

[0136] In some embodiments, combined Figure 13 and Figure 14 As shown, the guide protrusion 2122 and the first connection portion 213 are provided at the same end of the heat dissipation body 212 and are arranged sequentially along the second direction. In the first direction, the extension direction of the guide protrusion 2122 is opposite to the extension direction of the first connection portion 213. The first direction herein can also be understood as the front-to-back direction of the battery device 1000. Therefore, the extension direction of the guide protrusion 2122 is opposite to the extension direction of the first connection portion 213. This can also be understood as meaning that when the guide protrusion 2122 extends toward the front of the battery device 1000, the first connection portion 213 extends toward the rear of the battery device 1000. This allows the middle heat dissipation element 210 to simultaneously connect with two adjacent heat dissipation elements 210 among the three heat dissipation elements 210, thereby enabling the interconnected connection of multiple adjacent heat dissipation elements 210, facilitating the formation of the overall structure of the heat dissipation assembly 200 and improving the structural stability of the heat dissipation assembly 200.

[0137] At the same time, by arranging the guide protrusion 2122 and the first connection part 213 to be arranged in sequence along the second direction of the heat dissipation body 212, it is convenient to rationally utilize the space on the heat dissipation body 212 and avoid interference between the guide protrusion 2122 and the first connection part 213, so that the guide protrusion 2122 and the first connection part 213 can be arranged at the same end of the heat dissipation body 212, so that when the first connection part 213 is matched with the second connection part 2121, the guide protrusion 2122 can be effectively guided to match in the guide groove 2123, so as to realize the mutual matching connection between multiple adjacent heat dissipation parts 210.

[0138] In some embodiments, combined Figure 3 and Figure 4As shown, a buffer member 300 is provided between the protrusion 21131 and the battery cell 100. This can, to a certain extent, resist and buffer the external vibration and impact on the battery cell 100 during use, thereby reducing friction and collision between the battery cell 100 and the heat sink 210, further protecting the battery cell 100 and the heat sink 210 from damage, thereby improving the reliability and stability of the battery device 1000.

[0139] In some embodiments, the buffer 300 is made of foam or rubber.

[0140] It should be noted that the foam can fill the gap between the battery cell 100 and the protrusion 21131, and to a certain extent prevent the air flow from leaking through the gap between the battery cell 100 and the protrusion 21131. This can ensure that the air flow can flow according to the designed guide channel 2115, thereby improving the heat dissipation efficiency of the heat sink 210, and allowing the air flow to more effectively contact the entire large surface of the battery cell 100, thereby taking away the heat generated by the battery cell 100 and avoiding the problem of local overheating, thereby ensuring the safety and working performance of the battery device 1000.

[0141] Of course, in some other embodiments, the buffer member 300 may not be disposed between the heat dissipation member 210 and the battery cell 100 .

[0142] In one embodiment, if Figure 3 As shown, the multiple heat sinks 210 include two first heat sinks 214 (one of which is not shown) and a second heat sink 215. The two first heat sinks 214 are spaced apart in a first direction, and the second heat sink 215 is disposed between the two first heat sinks 214. The side of each first heat sink 214 facing the second heat sink 215 cooperates with the battery cells 100 to define a heat dissipation space. Each second heat sink 215 is provided with battery cells 100 on both sides in the first direction, and a heat dissipation space is defined between each second heat sink 215 and at least one battery cell 100 on one side. This allows one battery cell 100 to simultaneously correspond to two heat sinks 210, thereby improving the heat exchange efficiency between the battery cell 100 and the heat sink 210 to a certain extent. Furthermore, the first heat sink 214 and the second heat sink 215 protect the battery cell 100 from external impacts, thereby ensuring the operating performance of the battery cell 100 to a certain extent.

[0143] The specific structure of the first heat sink 214 can be found in Figures 8-12 The specific structure of the second heat sink 215 can be found in Figure 13-15 .

[0144] In some embodiments, each second heat dissipation member 215 may also define a heat dissipation space with the battery cells 100 on two opposite sides, which is not specifically limited in this application.

[0145] In some embodiments, combined Figure 3 、 Figure 4 and Figure 5 As shown, the battery device 1000 further includes an output stage base 400 (the specific structure of the output stage base 400 can also be seen in Figure 9 、 Figure 10 and Figure 11 The output stage base 400 is used to support the output stage circuit electrically connected to the battery cell 100. The output stage base 400 and the first heat sink 214 are integrally formed. Using the output stage base 400 to support the output stage circuit electrically connected to the battery cell 100 improves the stability of the output stage circuit and ensures its operating performance to a certain extent.

[0146] At the same time, by configuring the output stage base 400 and the first heat sink 214 as an integrally molded part, the output stage base 400 and the first heat sink 214 can be integrally molded. On the one hand, the number of molds used in the production of the output stage base 400 and the first heat sink 214 can be reduced, thereby reducing the packaging and production costs of the output stage base 400 and the first heat sink 214. On the other hand, the integration of the output stage base 400 and the first heat sink 214 can be improved, thereby improving the assembly efficiency and structural stability of the battery device 1000 to a certain extent.

[0147] At the same time, the integrally formed structural design of the output stage base 400 and the first heat sink 214 can also eliminate the original assembly gap between the output stage base 400 and the first heat sink 214, eliminating the risk of electrical safety caused by conductive parts around the output stage base 400 passing through the gap between the first heat sink 214 and the output stage base 400, thereby ensuring the safety of the battery device 1000.

[0148] In some embodiments, the battery device 1000 further includes a housing (not shown) having a hollow interior, within which the battery cells 100 and the heat sink assembly 200 are disposed. The housing provides mechanical protection for the battery cells 100, the heat sink assembly 200, and other components, preventing damage to the battery cells 100 and the heat sink assembly 200 from external forces such as collision, compression, or vibration during transportation, installation, and use, thereby ensuring the proper functioning of the battery cells 100 and the heat sink assembly 200.

[0149] In some embodiments, the outer shell is generally made of insulating material, which can isolate the charged components inside the battery device 1000 from the external environment to prevent electric shock accidents. At the same time, the outer shell can also prevent electrical short circuits between different battery cells 100, thereby ensuring the safety and reliability of the battery device 1000.

[0150] In some embodiments, combined Figure 3 and Figure 4 As shown, an elastic fin 500 is provided on the side of the first heat sink 214 facing away from the second heat sink 215. The elastic fin 500 protrudes toward the outer shell and abuts against the outer shell. The elastic fin 500 is used to absorb the stress generated by the expansion of the battery cell 100. This prevents the battery cell 100 from deformation or rupture, thereby extending the service life of the battery cell 100.

[0151] At the same time, the elastic fins 500 can also significantly increase the surface area of ​​the first heat sink 214. When the battery cell 100 generates heat during the charging and discharging process, the elastic fins 500 can dissipate the heat more effectively into the surrounding air, which can improve the heat dissipation effect of the first heat sink 214 to a certain extent, thereby ensuring the safety and working performance of the battery device 1000.

[0152] In some embodiments, combined Figure 3 and Figure 4 As shown, in the convex direction of the elastic fin 500, the elastic fin 500 extends obliquely relative to the housing. This gives the elastic fin 500 a certain curvature. When the battery cell 100 expands due to heat, the elastic fin 500 can effectively deform to absorb the stress generated by the expansion of the battery cell 100, thereby preventing the battery cell 100 from deforming or rupturing and extending the service life of the battery cell 100.

[0153] In some embodiments, combined Figure 3 、 Figure 4 、 Figure 13 and Figure 14 As shown, in the first direction, a protrusion 21131 is provided on one side of the second heat sink 215. The protrusion 21131 contacts the battery cell 100 to define a flow channel 2115. The other side of the second heat sink 215 defines a mounting space 2152. A mating member 2151 is provided within the mounting space 2152. The mating member 2151 cooperates with the battery cell 100 on the corresponding side to position the battery cell 100. By utilizing the protrusion 21131 to contact the battery cell 100 to define the flow channel 2115, the difficulty of forming the flow channel 2115 is reduced, thereby improving the heat dissipation effect of the heat dissipation assembly 200.

[0154] At the same time, by using the fitting 2151 to position the battery cell 100, the battery cell 100 is prevented from displacement or shaking under external force to a certain extent, so that the battery cell 100 can maintain a certain position stability, thereby ensuring the working performance of the battery cell 100.

[0155] In some embodiments, combined Figure 13 and Figure 14 As shown, the second heat sink 215 includes a heat sink body 212 and a mounting sidewall 217. The heat sink body 212 is provided with a protrusion 21131 on one side in the first direction. The mounting sidewall 217 includes a second connecting portion 2121. At least a portion of the mounting sidewall 217 is provided on the other side of the heat sink body 212 in the first direction. The mounting sidewall 217 cooperates with the heat sink body 212 to define a mounting space 2152. A mating member 2151 is provided on the side of the mounting sidewall 217 facing the mounting space 2152. Thus, the mating member 2151 is provided within the mounting space 2152, enabling the mating member 2151 to effectively cooperate with the battery cell 100 on the corresponding side to position the battery cell 100, thereby improving the positional stability of the battery cell 100.

[0156] At the same time, by arranging the fitting member 2151 on the installation side wall 217 , the installation side wall 217 can be used to support the fitting member 2151 , thereby improving the position stability of the fitting member 2151 and thus improving the working performance of the fitting member 2151 .

[0157] In some embodiments, the fitting 2151 can be mounted on the mounting side wall 217 by welding, bonding, or integral molding to improve the connection strength between the fitting 2151 and the mounting side wall 217 , thereby improving the position stability of the fitting 2151 .

[0158] In some embodiments, combined Figure 13 and Figure 14 As shown, there are multiple fittings 2151, each of which is an elastic sheet mounted in the mounting space 2152. The multiple elastic sheets engage with different side walls of the battery cell 100 to position the battery cell 100. By configuring the fittings 2151 as elastic sheets, the fittings 2151 can be deformed under external forces and return to their original shape after the external forces disappear. This facilitates the use of the fittings 2151 to secure the battery cell 100, maintaining a fixed position within the battery device 1000. This prevents displacement or collision of the battery cell 100 due to shaking, vibration, etc. during use, enhances the stability of the battery cell 100, and protects the battery cell 100 from mechanical damage. Furthermore, appropriate pressure helps maintain good contact between the battery cell 100 and other components (such as electrodes and connectors), thereby ensuring the performance of the battery cell 100.

[0159] It should be noted that since the elastic sheet has a certain elastic deformation ability, it can play a buffering role when the battery cell 100 is subjected to external impact or vibration. During the charging and discharging process of the battery cell 100, the battery cell 100 will undergo a slight change in volume due to internal chemical reactions. The elastic sheet can adapt to this volume change of the battery cell 100 through its own elastic deformation, avoiding stress concentration caused by the volume change of the battery cell 100, thereby protecting the structural integrity of the battery cell 100, and thus ensuring the working performance of the battery cell 100.

[0160] In addition, by providing multiple fittings 2151 and configuring the multiple fittings 2151 to engage with different side walls of the battery cell 100 , it is convenient to use the fittings 2151 to fix the multiple side walls of the battery cell 100 , thereby maximizing the positional stability of the battery cell 100 .

[0161] In some embodiments, the fitting 2151 can be made of materials such as silicone or rubber; or, the fitting 2151 is configured to extend obliquely relative to the mounting side wall 217 (e.g., Figure 14 as shown), so that the fitting 2151 is formed as an elastic part.

[0162] In some embodiments, as Figure 14 As shown, the mounting side wall 217 includes two second connection portions 2121 and a supporting bottom wall 216. The two second connection portions 2121 are spaced apart at opposite ends of the heat dissipation body 212 in the third direction. The supporting bottom wall 216 is provided at one end of the heat dissipation body 212 in the second direction. The two second connection portions 2121 and the supporting bottom wall 216 both extend along the first direction. The two second connection portions 2121, the supporting bottom wall 216, and the heat dissipation body 212 cooperate to define a mounting space 2152. This reduces the difficulty of forming the mounting space 2152, enables the mounting space 2152 to effectively support the battery cell 100, and improves the positional stability of the battery cell 100.

[0163] In some embodiments, as Figure 14 As shown, the two second connection parts 2121 and one supporting bottom wall 216 are each provided with at least one mating piece 2151 on one side facing the installation space 2152, so as to realize the setting of multiple mating pieces 2151, and enable the multiple mating pieces 2151 to abut against different side walls of the battery cell 100 to position the battery cell 100.

[0164] At the same time, by arranging at least one fitting 2151 on one side of the two second connection parts 2121 toward the installation space 2152, it is also convenient to use the fitting 2151 to achieve the spacing setting of the second connection part 2121 and the battery cell 100, thereby facilitating the definition of the discharge channel and reducing the difficulty of forming the discharge channel.

[0165] In some embodiments, as Figure 14 As shown, the heat dissipation body 212 is not provided with a supporting bottom wall 216 at the other end in the second direction, so as to form a mounting opening at the other end in the second direction of the heat dissipation element 210 , thereby reducing the difficulty of mounting the battery cell 100 .

[0166] In some embodiments, as Figure 14 As shown, the supporting bottom wall 216 extends along the second direction, and the two opposite ends of the supporting bottom wall 216 in the second direction are respectively connected to two second connecting parts 2121, so that the two second connecting parts 2121 and one supporting bottom wall 216 can support each other, thereby improving the positional stability of the second connecting parts 2121 and the supporting bottom wall 216.

[0167] The second connection portion 2121 and the supporting bottom wall 216 may be connected in a fitting manner by welding, bonding or an integral molding process.

[0168] The energy storage device 3000 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0169] like Figure 2 As shown, the energy storage device 3000 of the embodiment of the present application includes the battery device 1000 of the above embodiment, and the battery device 1000 is used to store or provide electrical energy.

[0170] Since the battery device 1000 of the embodiment of the present application has the above-mentioned technical effects, the energy storage device of the embodiment of the present application also has the above-mentioned technical effects. That is, by adopting the battery device 1000 of the present application, the safety of the energy storage device 3000 can be improved to a certain extent, and the service life of the energy storage device 3000 can be extended.

[0171] The following describes the electrical device 2000 according to an embodiment of the present application with reference to the accompanying drawings.

[0172] Combine Figure 1 and Figure 2 As shown, the electric device 2000 of the embodiment of the present application includes the battery device 1000 of the above embodiment or the energy storage device 3000 of the above embodiment, and the battery device 1000 is used to store or provide electric energy.

[0173] Since the battery device 1000 and the energy storage device 3000 of the embodiment of the present application have the above-mentioned technical effects, the power device 2000 of the embodiment of the present application also has the above-mentioned technical effects. That is, by adopting the battery device 1000 or the energy storage device 3000 of the present application, while ensuring the working performance of the power device 2000, the safety of use of the power device 2000 can also be improved and the service life of the power device 2000 can be extended.

[0174] It is understandable that other structures of the battery device 1000 , the energy storage device 3000 , and the power-consuming device 2000 according to the embodiment of the present application are well known to those skilled in the art and will not be described in detail here.

[0175] 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.

[0176] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: Battery cell (100); A heat dissipation assembly (200), the heat dissipation assembly (200) comprising a plurality of heat dissipation elements (210) spaced apart along a first direction, the battery cells (100) being disposed between two adjacent heat dissipation elements (210), a heat dissipation space being defined between each heat dissipation element (210) and its adjacent battery cells (100), the heat dissipation space being provided with an inlet in a second direction and an outlet (2112) in a third direction, and air flow being adapted to flow from the inlet into the heat dissipation space and out through the outlet (2112); The heat sink (210) comprises a heat sink body (212) and a second connection portion (2121), wherein the heat sink body (212) and the battery cell (100) define a heat sink space, wherein the second connection portion (2121) is provided at at least one end of the heat sink body (212) in the third direction, wherein at least a portion of the second connection portion (2121) is arranged opposite to the battery cell (100) in the third direction, and the second connection portion (2121) and the battery cell (100) are spaced apart to define a discharge channel, wherein the discharge channel is connected to the heat sink space via the outlet (2112), and the discharge channel is provided with a discharge outlet at at least one end of the second direction, and the first direction, the second direction and the third direction intersect with each other.

2. The battery device according to claim 1, wherein: A guide assembly (2113) is provided in at least one heat dissipation space corresponding to each battery cell (100), wherein the guide assembly (2113) defines a guide channel (2115), and the guide channel (2115) is used to guide the airflow from the inlet to the outlet (2112).

3. The battery device according to claim 2, characterized in that The guide assembly (2113) comprises a protrusion (21131) protruding from the heat sink (210), and the protrusion (21131) contacts the battery cell (100) to define the guide channel (2115).

4. The battery device according to claim 2, wherein: In the third direction, the outlets (2112) are provided on both sides of the heat dissipation space, and at least one guide channel (2115) is provided between each outlet (2112) and the inlet.

5. The battery device according to claim 4, characterized in that A plurality of guide channels (2115) arranged along the second direction are provided between each outlet (2112) and the inlet.

6. The battery device according to claim 1, wherein: A guide plate (2114) is provided at the inlet, and the guide plate (2114) is used to guide the airflow to flow toward the inlet.

7. The battery device according to claim 6, characterized in that The guide plate (2114) extends obliquely relative to the battery cell (100).

8. The battery device according to claim 1, wherein: The heat sink (210) comprises a first connecting portion (213), wherein the first connecting portion (213) and the second connecting portion (2121) are arranged at the same end of the heat sink body (212) in the third direction, and the first connecting portion (213) is used to achieve a matching connection between two adjacent heat sinks (210).

9. The battery device according to claim 8, characterized in that The second connection portion (2121) and the first connection portion (213) are arranged along the first direction. In the third direction, the first connection portion (213) protrudes from the second connection portion (2121). Among two adjacent heat sinks (210), the first connection portion (213) on one of the heat sinks (210) is limitedly engaged with the second connection portion (2121) of the other heat sink (210).

10. The battery device according to claim 9, characterized in that At least part of the heat dissipation body (212) is further provided with a guide protrusion (2122) and a guide groove (2123) on at least one end in the third direction, and the guide protrusion (2122) and the guide groove (2123) are arranged in sequence along the first direction. In two adjacent heat dissipation elements (210), the guide protrusion (2122) on one of the heat dissipation elements (210) is guided and fitted into the guide groove (2123) of the other heat dissipation element (210).

11. The battery device according to claim 10, characterized in that The guide protrusion (2122) and the first connection portion (213) are provided at the same end of the heat dissipation body (212) and are arranged in sequence along the second direction. In the first direction, the extension direction of the guide protrusion (2122) is opposite to the extension direction of the first connection portion (213).

12. The battery device according to claim 3, wherein: A buffer member (300) is provided between the protrusion (21131) and the battery cell (100).

13. The battery device according to any one of claims 1 to 12, characterized in that: The plurality of heat sinks (210) include two first heat sinks (214) and a second heat sink (215), wherein the two first heat sinks (214) are arranged at intervals in the first direction, and the second heat sink (215) is provided between the two first heat sinks (214). A side of each first heat sink (214) facing the second heat sink (215) cooperates with the battery cell (100) to define the heat dissipation space. Each second heat sink (215) is provided with the battery cell (100) on both sides in the first direction, and the heat dissipation space is defined between each second heat sink (215) and the battery cell (100) on at least one side.

14. The battery device according to claim 13, wherein: It also includes an output stage base (400), the output stage base (400) being used to support an output stage circuit electrically connected to the battery cell (100), the output stage base (400) and the first heat sink (214) being an integrally formed part.

15. The battery device according to claim 13, wherein: The device further comprises a shell, the interior of which is hollow, the battery cell (100) and the heat dissipation assembly (200) are both arranged in the shell, and an elastic fin (500) is provided on a side of the first heat dissipation member (214) facing away from the second heat dissipation member (215), the elastic fin (500) protruding toward the shell and abutting against the shell, and the elastic fin (500) is used to absorb stress generated by the expansion of the battery cell (100).

16. The battery device according to claim 15, characterized in that In the protruding direction of the elastic fin (500), the elastic fin (500) extends obliquely relative to the housing.

17. The battery device according to claim 13, wherein: In the first direction, a protrusion (21131) is provided on one side of the second heat dissipation member (215), the protrusion (21131) contacts the battery cell (100) to define a guide channel (2115), and the other side of the second heat dissipation member (215) defines an installation space (2152), a matching member (2151) is provided in the installation space (2152), and the matching member (2151) cooperates with the battery cell (100) on the corresponding side to position the battery cell (100).

18. The battery device according to claim 17, characterized in that The second heat sink (215) includes a heat sink body (212) and a mounting side wall (217), wherein the heat sink body (212) is provided with the protrusion (21131) on one side of the first direction, and the mounting side wall (217) includes a second connecting portion (2121), and at least a portion of the mounting side wall (217) is provided on the other side of the heat sink body (212) in the first direction, and the mounting side wall (217) cooperates with the heat sink body (212) to define the mounting space (2152), and the matching member (2151) is provided on the side of the mounting side wall (217) facing the mounting space (2152).

19. The battery device according to claim 17, wherein: There are a plurality of fitting pieces (2151), each of which is an elastic piece installed in the installation space (2152), and the plurality of elastic pieces are abutted against different side walls of the battery cell (100) to position the battery cell (100).

20. An energy storage device, characterized in that: The invention comprises a plurality of battery devices according to any one of claims 1 to 19, wherein the battery devices are used to store or provide electrical energy.

21. An electrical device, characterized in that: The invention comprises the battery device according to any one of claims 1 to 19 or the energy storage device according to claim 20, wherein the battery device is used to store or provide electrical energy.

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