Battery device, thermal management component, and electric device

Abstract

The invention relates to a battery device, a heat management component and an electric device. The battery device comprises a box body; the battery monomer is accommodated in the box body; the heat management part is attached to the battery monomers, and a heat exchange medium flows in the heat management part; the liquid storage structure is accommodated in the box body; when the volume of the single battery is expanded, the liquid storage structure can be communicated with the heat management component so as to assist the heat management component in accommodating the heat exchange medium; the box body comprises a box body and a limiting beam; the limiting beam is arranged in the box body to define an accommodating space; the battery monomers are arranged in the accommodating space; the liquid storage structure is arranged in the limiting beam or the box wall of the box body. The battery device, the heat management component and the power utilization device provided by the embodiment of the invention have the advantage of saving the occupied volume.

Description

Technical Field

[0001] The present application relates to the technical field of battery devices, and in particular to a battery device, a thermal management component, and an electrical device. Background Art

[0002] With the extensive development of new energy technologies, battery devices have been widely used. Since battery devices emit heat during use, it is necessary to ensure that the battery devices work at a suitable ambient temperature to extend the service life of the battery devices and the charging and discharging efficiency.

[0003] Currently, the solution of using the heat exchange medium flowing in the thermal management component to exchange heat in the battery device is gradually becoming the mainstream thermal management solution for battery devices. However, a larger storage structure is often required outside the battery device to store excess heat exchange medium, resulting in an increase in occupied volume. Summary of the invention

[0004] Based on this, it is necessary to provide a battery device, a thermal management component and an electrical device to address the problem of high occupied volume.

[0005] The first aspect of the present application provides a battery device, comprising: a box body; a battery cell, contained in the box body; a thermal management component, which is attached to the battery cell and has a heat exchange medium flowing inside the thermal management component; and a liquid storage structure, contained in the box body; when the battery cell expands in volume, the liquid storage structure can be connected to the thermal management component to assist the thermal management component in accommodating the heat exchange medium; the box body comprises a box body and a limiting beam; the limiting beam is arranged in the box body to define a accommodating space; the battery cell is arranged in the accommodating space; the liquid storage structure is arranged in the limiting beam or in the box wall of the box body.

[0006] By arranging a liquid storage structure to be accommodated in the box body, at the end of the operation of the battery device, the battery monomer expands in volume, squeezing the thermal management component, so that the volume of the heat exchange medium that can be accommodated by the thermal management component is reduced; by accommodating the liquid storage structure in the box body, the liquid storage structure can be connected to the thermal management component to assist the thermal management component in accommodating excess heat exchange medium, so that the storage structure outside the battery device does not need to be arranged with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device; by arranging the liquid storage structure in the limiting beam or the box wall of the box body, the space inside the box body can be effectively utilized, the space utilization rate is improved, and the structure of the battery device is simplified.

[0007] In one embodiment, the liquid storage structure is a liquid storage bottle; or, the closed cavity formed by the hollow interior of the limiting beam serves as the liquid storage structure.

[0008] In one embodiment, the battery device includes a first pipeline and a control valve, one end of the first pipeline is connected to the thermal management component, and the other end of the first pipeline extends outside the box; the liquid storage structure is connected to the first pipeline through the control valve. In this way, at the end of the operation of the battery device, the volume of the battery cell expands, squeezing the thermal management component, so that the volume of the heat exchange medium that can be accommodated by the thermal management component is reduced. By opening the control valve, the excess heat exchange medium enters the liquid storage structure through the first pipeline, so that the storage structure outside the battery device does not need to be set with a large volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0009] In one embodiment, the control valve is a solenoid valve or a one-way valve.

[0010] In one embodiment, the battery device includes a second pipeline, one end of which is connected to the thermal management component, and the other end of which extends outside the box, and the heat exchange medium flows through the second pipeline, the thermal management component, and the first pipeline in sequence. In this way, the heat exchange medium flows into the thermal management component through the second pipeline, and in the process of flowing in the internal heat exchange flow channel of the thermal management component, the heat exchange medium can effectively absorb the heat transferred from the battery cell to achieve heat dissipation. The heat exchange medium that has completed the heat exchange flows out through the first pipeline to achieve heat dissipation circulation.

[0011] In one embodiment, the thermal management component has a closed accommodating cavity and a heat exchange channel for the flow of heat exchange medium; the thermal management component is configured to be able to squeeze the accommodating cavity so that the accommodating cavity is connected to the heat exchange channel. In this way, at the end of the operation of the battery device, the volume of the battery cell expands, squeezing the thermal management component, so that the volume of the heat exchange channel in the thermal management component that can accommodate the heat exchange medium is reduced, and the accommodating cavity can be squeezed to communicate with the heat exchange channel. The accommodating cavity is used to accommodate the heat exchange medium in the thermal management component. Such a setting can make the thermal management component still able to accommodate the same volume of heat exchange medium even after being squeezed, so that the storage structure outside the battery device does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0012] In one embodiment, the thermal management component includes a current collector and a heat exchange plate with a hollow interior; the current collector is formed with a current collector channel for the heat exchange medium to flow; the heat exchange plate is formed with the accommodating cavity and the heat exchange channel, and the current collector is arranged at the end of the heat exchange plate so that the current collector channel is connected to the heat exchange channel. In this way, the current collector is connected with the first pipeline and the second pipeline, so that the heat exchange medium enters the heat exchange plate, so that the heat exchange plate can provide cooling and heat dissipation for the battery cell, so as to ensure that the battery device works at a suitable ambient temperature.

[0013] In one embodiment, the thermal management component includes a plurality of support plates and a plurality of closing plates; all the support plates are arranged at intervals in the heat exchange plate; in some of the support plates, a pipe with both ends open is formed between each two adjacent support plates to serve as the heat exchange channel; in another part of the support plates, a pipe is formed between each two adjacent support plates, and the closing plate closes both ends of the pipe to serve as the accommodating cavity. The two ends of the pipe are closed by the closing plate to serve as the accommodating cavity; at the end of the operation of the battery device, the support plate or the closing plate on the side wall of the accommodating cavity can be squeezed to communicate with the heat exchange channel, so that the thermal management component can still accommodate the same volume of heat exchange medium as before even after being squeezed, so that the storage structure outside the battery device does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0014] In one embodiment, the thermal management component includes an inner tube and a plurality of support plates; the inner tube is arranged in the internal space of the heat exchange plate, and the inner tube is a closed tube body for defining the accommodating cavity; all the support plates are arranged in the heat exchange plate at intervals, wherein two ends of a part of the support plates are respectively supported on one side wall of the heat exchange plate and the side wall of the inner tube, and two ends of another part of the support plates are respectively supported on both side walls of the heat exchange plate; a heat exchange channel is formed between every two adjacent support plates. In this way, by arranging the containing inner tube in the internal space of the heat exchange plate, at the end of the operation of the battery device, the battery cell expands in volume and squeezes the thermal management component, so that the volume of the heat exchange channel in the thermal management component that can accommodate the heat exchange medium is reduced, and the side wall of the containing inner tube can be squeezed to communicate with the heat exchange channel, and the excess heat exchange medium enters the containing inner tube. Such an arrangement allows the thermal management component to still accommodate the same volume of heat exchange medium even after being squeezed, so that the storage structure outside the battery device does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0015] In one embodiment, the thermal management component includes a puncturing structure; the puncturing structure is arranged on a side of the support plate facing the accommodating cavity, so as to puncture the accommodating cavity; and / or the puncturing structure is arranged on an inner side surface of a side wall of the heat exchange plate facing the accommodating cavity, so as to puncture the accommodating cavity.

[0016] In one embodiment, the puncture structure is a column structure, and the axis of the puncture structure is arranged to intersect with the accommodating cavity, so that it is convenient for the puncture structure to puncture the accommodating cavity.

[0017] The second aspect of the present application provides a thermal management component, which is applied to the above-mentioned battery device, and the thermal management component includes a current collecting piece and an internally hollow heat exchange plate; the current collecting piece forms a collecting channel for the flow of heat exchange medium; the heat exchange plate is formed with a closed accommodating cavity and a heat exchange channel, the heat exchange channel is used for the flow of heat exchange medium, the current collecting piece is arranged at the end of the heat exchange plate to connect the collecting channel to the heat exchange channel; the accommodating cavity can be squeezed to connect with the heat exchange channel.

[0018] In one embodiment, the thermal management component includes a plurality of support plates and a plurality of closing plates; all of the support plates are arranged at intervals inside the heat exchange plate; in some of the support plates, a pipe with open ends is formed between every two adjacent support plates to serve as the heat exchange flow channel; in another part of the support plates, a pipe is formed between every two adjacent support plates, and the closing plates close the two ends of the pipe to serve as the accommodating cavity.

[0019] In one embodiment, the thermal management component includes an inner tube and a plurality of support plates; the inner tube is arranged in the internal space of the heat exchange plate, and the inner tube is a closed tube body for defining the accommodating cavity; all the support plates are arranged in the heat exchange plate at intervals, wherein two ends of a part of the support plates are respectively supported on one side wall of the heat exchange plate and the side wall of the inner tube, and two ends of another part of the support plates are respectively supported on both side walls of the heat exchange plate; a heat exchange channel is formed between every two adjacent support plates.

[0020] In one embodiment, the thermal management component includes a puncturing structure; the puncturing structure is arranged on a side of the support plate facing the accommodating cavity, so as to puncture the accommodating cavity; and / or the puncturing structure is arranged on an inner side surface of a side wall of the heat exchange plate facing the accommodating cavity, so as to puncture the accommodating cavity.

[0021] In one embodiment, the puncture structure is a columnar structure, and the axis of the puncture structure is arranged to intersect with the accommodating cavity.

[0022] A third aspect of the present application provides an electrical device, comprising a storage structure and the above-mentioned battery device, wherein the storage structure is connected to the thermal management component.

[0023] 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

[0024] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0025] Figure 2 Schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application.

[0026] Figure 3 A schematic diagram of the structure of a battery module provided in some embodiments of the present application.

[0027] Figure 4 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0028] Figure 5 A schematic cross-sectional view of a battery device provided in some embodiments of the present application.

[0029] Figure 6 Schematic cross-sectional views of battery devices provided in some other embodiments of the present application.

[0030] Figure 7 A schematic diagram of the structure of a thermal management component provided in some embodiments of the present application.

[0031] Figure 8 A schematic diagram of the structure of a thermal management component provided for some embodiments of the present application, wherein the current collecting member is omitted.

[0032] Fig. 9 for Figure 8 An enlarged view of the C portion of the thermal management component is shown.

[0033] Fig.10 for Figure 8 A schematic diagram of the distribution of heat exchange channels and accommodating cavities in a thermal management component is shown.

[0034] Fig.11 for Figure 7 A B view of the thermal management component is shown, in which the current collecting piece is omitted.

[0035] Fig.12 for Fig.11 AA cross-sectional view of the thermal management component is shown.

[0036] Description of reference numerals:

[0037] Vehicles - 1000;

[0038] Battery device-100, box body-110, box cover-111, box body-112, limiting beam-113, battery module-120, battery cell-121, end cover-122, shell-123, electrode assembly-124, electrode terminal-125, thermal management component-130, accommodating cavity-131, heat exchange flow channel-132, collector-133, heat exchange plate-134, support plate-135, closing plate-136, accommodating inner tube-137, puncture structure-138, liquid storage structure-140, first pipeline-150, second pipeline-160, control valve-170, controller-200, motor-300. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. appear, these terms are only used for descriptive purposes to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationships of the indicated technical features.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] In the description of the embodiments of the present application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" refers to more than two groups (including two groups), and if the term "multiple sheets" appears, "multiple sheets" refers to more than two sheets (including two sheets).

[0045] In the description of the embodiments of the present application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0049] At present, from the perspective of market development, the application of power battery devices is becoming more and more extensive. Power battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power battery devices, the market demand is also constantly expanding.

[0050] In the related art, the battery device will emit heat during use, and a heat exchange system is required to ensure that the battery device works at a suitable ambient temperature, thereby extending the service life and charging and discharging efficiency of the battery device. Specifically, a thermal management component is provided in the battery device and is bonded to the battery cell. The heat of the battery cell is transferred to the heat exchange medium through the thermal management component. After the heat exchange medium flows out of the battery device, it exchanges heat externally and recirculates to the battery device to continuously take away the heat to achieve the purpose of cooling the battery device.

[0051] Therefore, when performing structural design, in addition to setting up thermal management components in the battery device, the heat exchange system often also separately designs corresponding heat exchange structures and storage structures outside the battery device; but this design often only considers the initial operation conditions of the battery device; that is, the sum of the capacity of the external storage structure and the capacity of the thermal management component is equal to or slightly greater than the volume of all heat exchange media.

[0052] As the battery device continues to cycle through charge and discharge, the battery cells will inevitably expand in volume, despite the use of battery cell shells, external limit beams and other methods to restrict the battery cells. Especially at the end of the operation of the battery device, the battery cells generally reach the end of their life, and the volume expansion phenomenon is very obvious; the thermal management components that fit closely to the battery cells will be squeezed by the battery cells, causing their own volume to become smaller, and then the capacity of the external storage structure and the capacity of the thermal management components are insufficient to fully accommodate all the heat exchange media, which will cause leakage in the storage structure and thermal management components. In this regard, it is usually considered to configure a larger external storage structure outside the battery device, but this in turn will further lead to increased costs and an increase in the volume occupied by the outside.

[0053] In order to alleviate the problem of the high volume occupied by the electrical device, a corresponding liquid storage structure can be designed for the battery device. At the end of the operation of the battery device, the battery cells expand in volume and the thermal management components are squeezed. The liquid storage structure can be connected to the thermal management component to accommodate excess heat exchange medium in the thermal management component. This makes it unnecessary to set a larger volume for the storage structure outside the battery device, thereby saving the cost of the electrical device and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0054] The embodiments of the present application provide a battery device, a thermal management component, and an electric device, which may be, but not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, an energy storage product, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc., and the energy storage product may include an energy storage station, etc.

[0055] It should be understood that the technical solutions generally described in the embodiments of the present application are not limited to being applicable to the electrical devices described above. For the sake of simplicity, an electrical device in an embodiment of the present application is taken as an example, which is a vehicle.

[0056] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail 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. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0057] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Figure 2 An exploded view of a battery device 100 provided in some embodiments of the present application; Figure 3 This is a schematic diagram of the structure of the battery module provided in some embodiments of the present application. Figure 2 and Figure 3 In order to meet different power requirements, the battery device 100 includes a plurality of battery cells 121 and a housing 110. The battery cell 121 refers to the smallest unit constituting the battery module 120 or the battery pack. The plurality of battery cells 121 can be connected in series and / or in parallel via electrode terminals for various applications. The housing 110 is used to accommodate the battery cells 121 or the battery module 120 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 121.

[0059] In the embodiment of the present application, multiple battery cells 121 can directly form a battery pack, or they can first form a battery module 120, and then the battery module 120 can form a battery pack. Specifically, multiple battery cells 121 can be directly connected in series, parallel or mixed together to form a whole, and then the whole formed by multiple battery cells 121 is accommodated in the box 110. Alternatively, multiple battery cells 121 can first be connected in series, parallel or mixed together to form a battery module 120, and then multiple battery modules 120 can be connected in series, parallel or mixed together to form a whole, and then accommodated in the box 110.

[0060] The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component for achieving electrical connection between the plurality of battery cells 121 .

[0061] Each battery cell 121 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, but is not limited thereto. The battery cell 121 can be cylindrical, flat, rectangular or other shapes. The battery cell 121 is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the implementation method of the present application is not limited to this. However, for the sake of simplicity, the following embodiments are all described by taking the square lithium-ion battery cell 121 as an example.

[0062] Please refer to Figure 4 , Figure 4 The schematic diagram of the exploded structure of the battery cell 121 provided in some embodiments of the present application. The battery cell 121 includes an end cap 122, a housing 123, an electrode assembly 124 and other functional components.

[0063] The end cap 122 refers to a component that covers the opening of the shell 123 to isolate the internal environment of the electrode assembly 124 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 123 to match the shell 123. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when it is squeezed and collided, so that the battery cell 121 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 125 can be provided on the end cap 122. The electrode terminal 125 can be used to electrically connect to the electrode assembly 124 for outputting or inputting electrical energy of the battery cell 121. In some embodiments, the end cap 122 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 121 reaches a threshold. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 122 to isolate the electrical connection components in the housing 123 from the end cap 122 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0064] The shell 123 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell 121, wherein the formed internal environment can be used to accommodate the electrode assembly 124, the electrolyte and other components. The shell 123 and the end cap 122 can be independent components, and an opening can be set on the shell 123, and the internal environment of the battery cell 121 is formed by covering the opening with the end cap 122 at the opening. Without limitation, the end cap 122 and the shell 123 can also be integrated. Specifically, the end cap 122 and the shell 123 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 123, the end cap 122 covers the shell 123. The shell 123 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 123 can be determined according to the specific shape and size of the electrode assembly 124. The shell 123 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0065] The electrode assembly 124 is a component in the battery cell 121 where an electrochemical reaction occurs. One or more electrode assemblies 124 may be contained in the housing 123. The electrode assembly 124 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 124, and the parts of the positive and negative electrode sheets without active materials each constitute a pole ear (not shown). The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery device, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal 125 to form a current loop.

[0066] Figure 5 A schematic cross-sectional view of a battery device provided in some embodiments of the present application. Figure 6 Schematic cross-sectional views of battery devices provided in some other embodiments of the present application.

[0067] A first aspect of the present application provides a battery device 100 , including: a box 110 , a battery cell 121 , a thermal management component 130 , and a liquid storage structure 140 .

[0068] Among them, the battery cell 121 is accommodated in the box body 110; the thermal management component 130 is in contact with the battery cell 121, and a heat exchange medium flows inside the thermal management component 130; the liquid storage structure 140 is accommodated in the box body 110; when the volume of the battery cell 121 expands, the liquid storage structure 140 can be connected with the thermal management component 130 to assist the thermal management component 130 in accommodating the heat exchange medium.

[0069] The thermal management component 130 is the main structure for supporting the battery cell 121, and is generally a flat plate structure; the thermal management component 130 is contained in the box 110 and is used for heat exchange with the battery cell 121. A heat exchange flow channel 132 (mentioned below) for the flow of heat exchange medium is formed inside the thermal management component 130. The heat exchange medium flows in or out from both ends of the thermal management component 13 along the length direction, and the battery cell 121 is placed on one side of the plate surface of the thermal management component 130 along the thickness direction. In this way, heat exchange is achieved between the plate surface of the thermal management component 130 and the battery cell 121.

[0070] In the embodiment of the present application, the heat exchange medium may be water, alcohol coolant or glycerin coolant. In this way, the heat exchange medium can effectively absorb the heat transferred from the battery cell 121 during the flow in the heat exchange channel 132 to achieve heat dissipation.

[0071] In the initial stage of operation of the battery device 100, the battery cell 121 does not undergo volume expansion, the thermal management component 130 can normally accommodate the heat exchange medium, and the heat exchange medium circulates in the thermal management component 130. During the flow of the heat exchange medium inside the thermal management component 130, the heat transferred from the battery cell 121 can be effectively absorbed to achieve heat dissipation.

[0072] At the end of the operation of the battery device 100, the battery cells 121 often expand in volume, squeezing the thermal management component 130, so that the volume of the thermal management component 130 that can accommodate the heat exchange medium is reduced; by accommodating the liquid storage structure 140 in the box body 110, the liquid storage structure 140 can be connected to the thermal management component 130 to assist the thermal management component 130 in accommodating excess heat exchange medium, so that the storage structure outside the battery device 100 does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0073] In some possible embodiments, see Figure 6 As shown, the box body 110 includes a box body 112 and a limiting beam 113; the limiting beam 113 is arranged in the box body 112 to define a accommodating space; the battery cell 121 is arranged in the accommodating space; and the liquid storage structure 140 is arranged in the limiting beam 113 or the box wall of the box body 112.

[0074] Specifically, the box body 110 can adopt a variety of structures. In some embodiments, the box body 110 can include a box cover 111 and a box body 112, the box cover 111 and the box body 112 cover each other, and the box cover 111 and the box body 112 jointly define a storage space for accommodating the battery cell 121. The box body 112 can be a hollow structure with one end open, and the box cover 111 can be a plate-like structure. The box cover 111 covers the open side of the box body 112, so that the box cover 111 and the box body 112 jointly define a storage space; the box cover 111 and the box body 112 can also be hollow structures with one side open, and the open side of the box cover 111 covers the open side of the box body 112. Of course, the box body 110 formed by the box cover 111 and the box body 112 can be in a variety of shapes, such as a simple three-dimensional structure such as a single cuboid or a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid or a cylinder or a sphere, which is not limited in the embodiments of the present application. The material of the box body 110 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber and epoxy resin, and the implementation mode of the present application is not limited to this.

[0075] The limiting beam 113 is used to be placed in the box 110 as the side wall of the energy zone. The energy zone can accommodate multiple battery cells 121 or battery modules 120 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 121. The limiting beam 113 can abut against the large surface of the battery cell 121 to avoid free deformation.

[0076] In the initial stage of operation of the battery device 100, the battery cell 121 does not undergo volume expansion, the thermal management component 130 can normally accommodate the heat exchange medium, and the heat exchange medium circulates in the thermal management component 130. During the flow of the heat exchange medium inside the thermal management component 130, the heat transferred from the battery cell 121 can be effectively absorbed to achieve heat dissipation. At the end of the operation of the battery device 100, the battery cell 121 often expands in volume, squeezing the thermal management component 130, so that the volume of the heat exchange medium that the thermal management component 130 can accommodate is reduced; the liquid storage structure 140 can be connected to the thermal management component 130 to assist the thermal management component 130 in accommodating excess heat exchange medium. By setting the liquid storage structure 140 in the limiting beam 113 or the box wall of the box body 112, the excess heat exchange medium is stored in the limiting beam 113 or the box wall of the box body 112 in disguised form, which can not only effectively utilize the space inside the box body 110, but also improve the space utilization rate in the box body 110, and effectively simplify the structural design of the battery device 100; ultimately, the storage structure outside the battery device 100 does not need to be set with a large volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturization design of the electrical device.

[0077] It should be noted that in each embodiment of the present application, the large surface refers to the side surface with the largest surface area in the battery cell 121 .

[0078] In some other embodiments, see Figure 5 As shown, the liquid storage structure 140 may also be arranged in the accommodating space of the box body 110 instead of being arranged in the limiting beam 113 or the box wall of the box body 112, and the specific arrangement shall be subject to the design.

[0079] In some possible embodiments, see Figure 6 As shown, the liquid storage structure 140 is a liquid storage bottle. Specifically, the liquid storage bottle can be a hollow bottle structure with one end open. By connecting the liquid storage bottle to the thermal management component 130 and setting the liquid storage bottle on the limiting beam 113, the space inside the box 110 can be effectively utilized, the space utilization rate can be improved, and the structure of the battery device 100 can be simplified. The liquid storage bottle is used to accommodate the excess heat exchange medium in the thermal management component 130, so that the storage structure outside the battery device 100 does not need to be set with a large volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0080] Optionally, the liquid storage bottle can be made of stainless steel, aluminum alloy or plastic.

[0081] In some possible embodiments, see Figure 6 As shown, the closed cavity formed by the hollow interior of the limiting beam 113 serves as the liquid storage structure 140. By providing the closed cavity on the limiting beam 113, the internal structure of the battery device 100 can be effectively simplified, and the space on the limiting beam 113 can be effectively utilized. The liquid storage structure 140 is used to accommodate the excess heat exchange medium in the thermal management component 130, so that the storage structure outside the battery device 100 does not need to be provided with a large volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0082] In some possible embodiments, see Figure 5 and Figure 6 As shown, the battery device 100 includes a first pipeline 150 and a control valve 170 , one end of the first pipeline 150 is connected to the thermal management component 130 , and the other end of the first pipeline 150 extends outside the box 110 ; the liquid storage structure 140 is connected to the first pipeline 150 through the control valve 170 .

[0083] The control valve 170 is arranged between the liquid storage structure 140 and the first pipeline 150. In the initial stage of the operation of the battery device 100, the battery cell 121 does not expand in volume, and the thermal management component 130 can normally accommodate the heat exchange medium. At this time, the control valve 170 is in a disconnected state, and the heat exchange medium flows into or out of the thermal management component 130 through the first pipeline 150. During the flow of the heat exchange medium in the internal heat exchange channel 132 of the thermal management component 130, the heat transferred from the battery cell 121 can be effectively absorbed to achieve heat dissipation. At the end of the operation of the battery device 100, the battery cell 121 expands in volume, squeezing the thermal management component 130, so that the volume of the heat exchange medium that can be accommodated by the thermal management component 130 is reduced. The control valve 170 is opened, and the excess heat exchange medium enters the liquid storage structure 140 through the first pipeline 150, so that the storage structure outside the battery device 100 does not need to be set with a large volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0084] In some possible embodiments, the control valve 170 may be a solenoid valve or a one-way valve. The control valve 170 may be controlled to open or disconnect by an electrical signal. When the battery cell 121 undergoes a sufficient electrical cycle to reach a predetermined number of times, the control valve 170 is switched from the disconnected state to the open state by an electrical signal control, and the thermal management component 130 is connected to the liquid storage structure 140 through the first pipeline 150, and the excess heat exchange medium flows from the first pipeline 150 to the liquid storage structure 140 for storage, so that the storage structure outside the battery device 100 does not need to be set with a large volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0085] The control valve 170 can also detect the pressure of the heat exchange medium by setting a pressure spring inside. When a certain pressure is reached, the control valve 170 switches from the disconnected state to the open state. The thermal management component 130 passes through the first pipeline 150 and the liquid storage structure 140. The excess heat exchange medium flows unidirectionally from the first pipeline 150 to the liquid storage structure 140 for storage, so that the storage structure outside the battery device 100 does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0086] In some possible embodiments, see Figure 5 and Figure 6 As shown, the end of the first pipeline 150 includes a first connecting pipe 151, and the first pipeline 150 is connected to the thermal management component 130 through the first connecting pipe 151. The first connecting pipe 151 is usually a metal pipe, and is laterally inserted into the side wall of the thermal management component 130. The first connecting pipe 151 is connected to the heat exchange flow channel 132 to connect to the pipeline of the external circulation heat exchange medium, which will not be repeated here.

[0087] In some possible embodiments, see Figure 5 and Figure 6 As shown, the battery device 100 includes a second pipeline 160, one end of which is connected to the thermal management component 130, and the other end of the second pipeline 160 extends outside the box 110, and the heat exchange medium flows through the second pipeline 160, the thermal management component 130 and the first pipeline 150 in sequence.

[0088] In the early stage of the operation of the battery device 100, the battery cell 121 does not expand in volume, and the thermal management component 130 can normally accommodate the heat exchange medium. At this time, the control valve 170 is in the disconnected state; the heat exchange medium flows into the thermal management component 130 through the second pipeline 160. During the process of the heat exchange medium flowing in the internal heat exchange channel 132 of the thermal management component 130, it can effectively absorb the heat transferred from the battery cell 121 to achieve heat dissipation. The heat exchange medium that has completed the heat exchange flows out through the first pipeline 150 to achieve heat dissipation circulation. At the end of the operation of the battery device 100, the battery cell 121 expands in volume, squeezing the thermal management component 130, so that the volume of the heat exchange medium that the thermal management component 130 can accommodate is reduced, and the control valve 170 is opened, and the excess heat exchange medium enters the liquid storage structure 140 through the first pipeline 150, so that the storage structure outside the battery device 100 does not need to be set with a large volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device.

[0089] In some possible embodiments, see Figure 5 and Figure 6 As shown, the end of the second pipeline 160 includes a second connecting pipe 161, and the second pipeline 160 is connected to the thermal management component 130 through the second connecting pipe 161. The second connecting pipe 161 is usually a metal pipe, and is laterally inserted into the side wall of the thermal management component 130. The second connecting pipe 161 is connected to the heat exchange flow channel 132 to connect to the pipeline of the external circulation heat exchange medium, which will not be repeated here.

[0090] Figure 7 A schematic diagram of the structure of a thermal management component provided in some embodiments of the present application. Figure 8 A schematic diagram of the structure of a thermal management component provided in some embodiments of the present application. Fig. 9 for Figure 8 An enlarged view of the C portion of the thermal management component is shown. Fig.10 for Figure 8 A schematic diagram of the distribution of heat exchange channels and accommodating cavities in a thermal management component is shown. Fig.11 for Figure 7 A B-view of the thermal management component shown. Fig.12 for Fig.11 AA cross-sectional view of the thermal management component is shown.

[0091] In some possible embodiments, see Figures 5 to 12 As shown, the heat management component 130 has a closed accommodating cavity 131 and a heat exchange channel 132 for the heat exchange medium to flow; the heat management component 130 is configured to be able to squeeze the accommodating cavity 131 so that the accommodating cavity 131 is connected to the heat exchange channel 132.

[0092] Specifically, the accommodating chamber 131 can be squeezed to communicate with the heat exchange channel 132, so as to accommodate the excess heat exchange medium in the thermal management component 130. In the early stage of the operation of the battery device 100, the battery cell 121 does not undergo volume expansion, and the thermal management component 130 can normally accommodate the heat exchange medium. At this time, the control valve 170 is in a disconnected state, and the heat exchange medium flows into the thermal management component 130 through the second pipeline 160. During the flow of the heat exchange medium in the internal heat exchange channel 132 of the thermal management component 130, it can effectively absorb the heat transferred from the battery cell 121 to achieve heat dissipation. The heat exchange medium that has completed the heat exchange flows out through the first pipeline 150 to achieve heat dissipation circulation. It should be emphasized that at this stage, the accommodating chamber 131 is in a completely closed state, and is neither involved in heat exchange nor used to accommodate heat exchange medium.

[0093] At the end of the operation of the battery device 100, the battery cell 121 expands in volume, squeezing the thermal management component 130, so that the volume of the heat exchange channel 132 in the thermal management component 130 that can accommodate the heat exchange medium is reduced, and the accommodating cavity 131 can be squeezed to communicate with the heat exchange channel 132. The accommodating cavity 131 is used to accommodate the heat exchange medium in the thermal management component 130. This arrangement allows the thermal management component 130 to still accommodate the same volume of heat exchange medium even after being squeezed, so that the storage structure outside the battery device 100 does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0094] It should be emphasized that, since the accommodation cavity 131 is located inside the thermal management component 130 , it does not need to occupy the internal space of the battery device 100 , which is beneficial to the miniaturized design of the battery device 100 .

[0095] The design of the accommodating chamber 131 can be used in combination with the liquid storage structure 140 to accommodate the excess heat exchange medium in the thermal management component 130, so that the storage structure outside the battery device 100 does not need to be set with a large volume, thereby saving costs and reducing the external occupied volume, which is conducive to the overall miniaturization design of the electrical device. However, in some other embodiments, the design of the accommodating chamber 131 can be used alone without the need to cooperate with the liquid storage structure 140.

[0096] In some possible embodiments, see Figures 7 to 12 As shown, the thermal management component 130 includes a collecting piece 133 and an internally hollow heat exchange plate 134; the collecting piece 133 forms a collecting channel for the heat exchange medium to flow; the heat exchange plate 134 is formed with a accommodating cavity 131 and a heat exchange channel 132, the collecting piece 133 is arranged at the end of the heat exchange plate 134, and the collecting channel is connected to the heat exchange channel 132.

[0097] It should be noted that the heat exchange plate 134 is a hollow tube shell structure having a surrounding side wall, and the enclosed space inside is used to form the heat exchange channel 132 and the accommodating cavity 131 .

[0098] The heat management component 130 includes two collectors 133, which are respectively used to connect the first pipeline 150 and the second pipeline 160 to input or output the heat exchange medium. A collector flow channel (not marked) for the heat exchange medium to flow is formed inside the collector 133. The two collectors 133 are arranged at the two ends of the heat exchange plate 134 so that the collector flow channel is connected to the heat exchange flow channel 132, and the heat exchange flow channel 132 is used for the heat exchange medium to flow. Specifically, the current collector 133 is matched with the end of the heat exchange plate 134 and is connected with the heat exchange flow channel 132, wherein the current collector 133 can be interference fit on the end of the heat exchange plate 134; one end of the heat exchange plate 134 along its length direction is inserted into the current collector 133, and the area where the current collector 133 and the heat exchange plate 134 are sleeved is usually not used to place the battery cell 121; in this way, the current collector 133 is connected to the first pipeline 150 and the second pipeline 160, and the heat exchange medium enters the heat exchange plate 134, so that the heat exchange plate 134 can provide cooling and heat dissipation for the battery cell 121 to ensure that the battery device operates at a suitable ambient temperature.

[0099] Optionally, the heat exchange plate 134 is a harmonica tube cooling plate, a profile liquid cooling plate or a stamping liquid cooling plate.

[0100] Optionally, the heat exchange plate 134 can be made of aluminum alloy, which has good strength, light weight and good thermal conductivity. In addition, the heat exchange plate 134 can also be made of plastic, which is subject to the design.

[0101] Optionally, the cross section of the heat exchange plate 134 is a flat plate structure, and the heat exchange plate 134 has two relatively large surfaces (not marked) with a large area, and a side surface (not marked) connecting the two large surfaces. The large surface of the heat exchange plate 134 is usually a horizontal plate surface or a nearly horizontal curved surface. One side of the large surface of the heat exchange plate 134 can be used to bear the battery cell 121, and the side surface can be a curved surface to improve the overall rigidity. The shape of the opening cross section of the current collector 133 should be compatible with the end of the heat exchange plate 134 to ensure that the two can be plugged in with interference.

[0102] In some possible embodiments, see Figures 7 to 10 As shown, the heat management component 130 includes a plurality of support plates 135 and a plurality of closing plates 136 ; all the support plates 135 are arranged at intervals inside the heat exchange plate 134 .

[0103] In some support plates 135, a pipe with two ends opened is formed between each two adjacent support plates 135 to serve as a heat exchange channel 132, so that the heat exchange medium can enter different heat exchange channels 132 and flow along a predetermined trajectory. In the early stage of the operation of the battery device 100, the battery cell 121 does not expand in volume, and all the heat exchange channels 132 in the thermal management component 130 can normally accommodate the heat exchange medium. At this time, the control valve 170 is in a disconnected state, and the heat exchange medium flows into the thermal management component 130 through the second pipeline 160. During the flow of the heat exchange medium in the internal heat exchange channel 132 of the thermal management component 130, the heat exchange medium can effectively absorb the heat transferred from the battery cell 121 to achieve heat dissipation. The heat exchange medium that has completed the heat exchange flows out through the first pipeline 150 to achieve heat dissipation circulation.

[0104] In the other part of the support plates 135, a pipe is formed between each two adjacent support plates 135, and the closing plates 136 close the two ends of the pipe to serve as the accommodating chamber 131; in the early stage of the operation of the battery device 100, the accommodating chamber 131 is in a completely closed state, neither participating in heat exchange nor used to accommodate heat exchange medium. The shape and size of the closing plate 136 should be adapted to the cross-section of the pipe opening at the end of the heat exchange plate 134 to ensure that the two can cover and seal.

[0105] At the end of the operation of the battery device 100, the battery cell 121 expands in volume, squeezing the thermal management component 130, so that the volume of the heat exchange channel 132 in the thermal management component 130 that can accommodate the heat exchange medium is reduced, and the support plate 135 or the closing plate 136 on the side wall of the accommodating cavity 131 can be squeezed to communicate with the heat exchange channel 132. This arrangement allows the thermal management component 130 to still accommodate the same volume of heat exchange medium even after being squeezed, so that the storage structure outside the battery device 100 does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0106] Optionally, a weak portion may be provided on the support plate 135 in the area corresponding to the accommodating cavity 131 , and the weak portion may be a groove. When the thermal management component 130 is squeezed, the support plate 135 can be quickly broken to connect the accommodating cavity 131 with the heat exchange channel 132 .

[0107] Optionally, the support plate 135 and the side wall of the heat exchange plate 134 are integrally connected, and the three can be processed at one time by injection molding, stamping, etc., which is simple in process and low in cost. The support plate 135 and the closing plate 136 can be connected by welding.

[0108] Optionally, the support plate 135 and the closing plate 136 may be aluminum alloy plates or plastic plates.

[0109] Optionally, combined Fig.10As shown, along the width direction of the heat exchange plate 134 , the accommodating chambers 131 and the heat exchange channels 132 are alternately arranged in the heat exchange plate 134 in sequence.

[0110] Combination Figure 5 and Fig.10 As shown, one of the current collectors 133 is connected to the left end of the heat exchange plate 134 as the input end of the heat exchange medium, and the other current collector 133 is connected to the right end of the heat exchange plate 134 as the outflow end of the heat exchange medium (they have been interference fit together in the figure); the heat exchange medium flows in from the left current collector 133, and enters the heat exchange channel 132 through the flow channel opening on the left end of the heat exchange plate 134; the heat exchange medium can flow in a straight line from left to right along the heat exchange channel 13 in the heat exchange plate 134, or flow in an S-shaped meandering flow, so that the heat exchange plate 134 can provide cooling and heat dissipation for the battery cell 121, so as to ensure that the battery device 100 works at a suitable ambient temperature, which is subject to the design; the heat exchange medium after heat exchange flows out from the flow channel opening on the right end of the heat exchange plate 134 to the right current collector 133, and then flows back to the external pipeline to realize the recycling of the heat exchange medium.

[0111] In some possible embodiments, see Figure 5 , Fig.11 and Fig.12 As shown, the heat management component 130 includes an accommodating inner tube 137 and a plurality of support plates 135; the accommodating inner tube 137 is disposed in the internal space of the heat exchange plate 134, and the accommodating inner tube 137 is a closed tube body used to define the accommodating cavity 131. All the support plates 135 are arranged in the heat exchange plate 134 at intervals, wherein the two ends of a part of the support plates 135 are respectively supported on one side wall of the heat exchange plate 134 and the side wall of the accommodating inner tube 137, and the two ends of the other part of the support plates 135 are respectively supported on the two side walls of the heat exchange plate 134; a heat exchange flow channel 132 is formed between each two adjacent support plates 135.

[0112] The accommodating inner tube 137 is a hollow tube shell structure having a surrounding side wall, and the space enclosed inside is used to form the accommodating cavity 131. The accommodating inner tube 137 is integrally sleeved in the space enclosed by the heat exchange plate 134.

[0113] A plurality of heat exchange channels 132 separated from each other are formed between each two adjacent support plates 135. It is convenient for the heat exchange medium to enter different heat exchange channels 132 and flow along a predetermined trajectory. In the early stage of the operation of the battery device 100, the battery cell 121 does not undergo volume expansion, and all the heat exchange channels 132 in the thermal management component 130 can normally accommodate the heat exchange medium. At this time, the control valve 170 is in a disconnected state, and the heat exchange medium flows into the thermal management component 130 through the second pipeline 160. During the flow of the heat exchange medium in the internal heat exchange channel 132 of the thermal management component 130, it can effectively absorb the heat transferred from the battery cell 121 to achieve heat dissipation. The heat exchange medium after heat exchange flows out through the first pipeline 150 to achieve heat dissipation circulation. At this time, the accommodating inner tube 137 is arranged in the internal space of the heat exchange plate 134 and is used to define the accommodating chamber 131. In the early stage of the operation of the battery device 100, the accommodating inner tube 137 is in a completely closed state, neither participating in heat exchange nor used to accommodate heat exchange medium. The shape and size of the accommodating inner tube 137 should be smaller than the internal space of the heat exchange plate 134 to ensure that the heat exchange plate 134 is sleeved on the outside of the accommodating inner tube 137 and there is enough gap between the two for setting the support plate 135.

[0114] At the end of the operation of the battery device 100, the battery cell 121 expands in volume, squeezing the thermal management component 130, so that the volume of the heat exchange channel 132 in the thermal management component 130 that can accommodate the heat exchange medium is reduced, and the side wall of the inner tube 137 can be squeezed to communicate with the heat exchange channel 132, and the excess heat exchange medium enters the inner tube 137. This arrangement allows the thermal management component 130 to still accommodate the same volume of heat exchange medium even after being squeezed, so that the storage structure outside the battery device 100 does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0115] Optionally, the inner tube 137 can be made of aluminum alloy, which has good strength, light weight and good thermal conductivity.

[0116] Optionally, the support plate 135 and the outer wall accommodating the inner tube 137 may be connected by welding.

[0117] Optionally, a weak portion may be provided on the side wall of the accommodating inner tube 137 , and the weak portion may be a groove. When the thermal management component 130 is squeezed, the side wall of the accommodating inner tube 137 can be quickly squeezed to connect the accommodating cavity 131 with the accommodating inner tube 137 .

[0118] It should be noted that, during the specific setting, the accommodating inner tube 137 can be provided to form the accommodating cavity 131 in the heat exchange plate 134, or the accommodating cavity 131 can be formed by providing a closing plate 136 and closing it between two support plates 135; the above two methods can be implemented either one or at the same time, and the embodiments of the present application do not limit this.

[0119] In some possible embodiments, see Figures 5 to 12 As shown, the thermal management component 130 includes a puncturing structure 138 ; the puncturing structure 138 is disposed in the heat exchange plate 134 and can be used to puncture the accommodating cavity 131 .

[0120] When the closing plate 136 and the supporting plate 135 are combined to form a closed channel as the accommodating chamber 131 , the side wall of the accommodating chamber 131 is also the supporting plate 135 .

[0121] When the accommodating inner tube 137 is used as the accommodating chamber 131 , the side wall of the accommodating chamber 131 is also the side wall of the accommodating inner tube 137 .

[0122] At the end of the operation of the battery device 100, the battery cell 121 expands in volume, so that the volume of the heat exchange channel 132 in the thermal management component 130 that can accommodate the heat exchange medium is reduced, the outside of the thermal management component 130 is squeezed, and the side wall of the thermal management component 130 is recessed inward, so that the puncture structure 138 is close to the side wall of the accommodating cavity 131 and the two are abutted; as the external force further squeezes the thermal management component 130, the puncture structure 138 finally punctures the side wall of the accommodating cavity 131, so that the accommodating cavity 131 is connected with the heat exchange channel 132, and the punctured accommodating cavity 131 can accommodate excess heat exchange medium. In this way, the thermal management component 130 can still accommodate the same volume of heat exchange medium even after being squeezed, so that the storage structure outside the battery device 100 does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturization design of the electrical device.

[0123] Optionally, see Fig. 9 and Fig.11 As shown, the piercing structure 138 may be disposed on the side of the support plate 135 facing the accommodating cavity 131, so as to pierce the accommodating cavity 131. The piercing structure 138 may be made of aluminum alloy, and the piercing structure 138 and the support plate 135 may be integrally connected or welded.

[0124] Optionally, see Fig.11 and Fig.12 As shown, the piercing structure 138 is disposed on the surface of the side wall of the heat exchange plate 134 facing the accommodating cavity 131, so as to pierce the accommodating cavity 131. The piercing structure 138 can be made of aluminum alloy, and the piercing structure 138 and the heat exchange plate 134 can be connected integrally or by welding.

[0125] Optionally, the piercing structure 138 is generally a column, a spike or other sharp shapes.

[0126] Optionally, the number of the puncture structures 138 in the heat management component 130 may be 1, 2, 3, 10, 16, 31, or 99, which is not limited in the present application. All puncture structures 138 may be arranged in one or more rows in the heat exchange plate 134 to puncture the accommodating cavity 131.

[0127] In some possible embodiments, the puncturing structure 138 is a columnar structure, and the axis of the puncturing structure 138 is arranged to intersect with the accommodating cavity 131 .

[0128] When the outside of the thermal management component 130 is squeezed, the puncturing structure 138 approaches the accommodating cavity 131. By setting the axis of the puncturing structure 138 to intersect with the accommodating cavity 131, the puncturing structure 138 can more easily puncture the side wall of the accommodating cavity 131, and the accommodating cavity 131 is connected with the heat exchange channel 132. As a result, the thermal management component 130 can still accommodate the same volume of heat exchange medium even after being squeezed, so that the storage structure outside the battery device 100 does not need to be set with a larger volume, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0129] The second aspect of the present application provides a thermal management component 130, which can be applied to the above-mentioned battery device 100 including the liquid storage structure 140; in some other embodiments, the thermal management component 130 provided in the second aspect of the present application is used alone in the battery device 100 that does not include the liquid storage structure 140, which can make it unnecessary to set a larger volume for the storage structure outside the battery device 100, thereby saving costs and reducing the external occupied volume, which is beneficial to the overall miniaturized design of the electrical device.

[0130] Among them, the thermal management component 130 includes a collecting piece 133 and an internally hollow heat exchange plate 134; the collecting piece 133 forms a collecting channel for the flow of heat exchange medium; the heat exchange plate 134 is formed with a closed accommodating cavity 131 and a heat exchange channel 132, the heat exchange channel 132 is used for the flow of heat exchange medium, and the collecting piece 133 is arranged at the end of the heat exchange plate 134 to connect the collecting channel to the heat exchange channel 132; the accommodating cavity 131 can be squeezed to connect with the heat exchange channel 132.

[0131] In some possible embodiments, see Figures 7 to 10As shown, the thermal management component 130 includes a plurality of support plates 135 and a plurality of closing plates 136; all the support plates 135 are arranged at intervals in the heat exchange plate 134; in some of the support plates 135, a pipe with both ends opened is formed between every two adjacent support plates 135 to serve as a heat exchange flow channel 132; in another part of the support plates 135, a pipe is formed between every two adjacent support plates 135, and the closing plates 136 close both ends of the pipe to serve as a accommodating cavity 131.

[0132] In some possible embodiments, see Figure 5 , Fig.11 and Fig.12 As shown, the thermal management component 130 includes an accommodating inner tube 137 and a plurality of support plates 135; the accommodating inner tube 137 is arranged in the internal space of the heat exchange plate 134, and the accommodating inner tube 137 is a closed tube body for defining the accommodating cavity 131; all the support plates 135 are arranged in the heat exchange plate 134 at intervals, wherein two ends of a part of the support plates 135 are respectively supported on one side wall of the heat exchange plate 134 and the side wall of the accommodating inner tube 137, and two ends of another part of the support plates 135 are respectively supported on both side walls of the heat exchange plate 134; a heat exchange flow channel 132 is formed between every two adjacent support plates 135.

[0133] In some possible embodiments, see Figures 5 to 12 As shown, the heat management component 130 includes a piercing structure 138 ; the piercing structure 138 is disposed on a side of the support plate 135 facing the accommodating cavity 131 for piercing the accommodating cavity 131 .

[0134] In some possible embodiments, see Figures 5 to 12 As shown, the piercing structure 138 is disposed on the inner side of the side wall of the heat exchange plate 134 facing the accommodating cavity 131 , so as to be used for piercing the accommodating cavity 131 .

[0135] In some possible embodiments, the puncturing structure 138 is a columnar structure, and the axis of the puncturing structure 138 is arranged to intersect with the accommodating cavity 131 .

[0136] A third aspect of the present application is an electrical device, comprising a storage structure and the above-mentioned battery device 100, wherein the storage structure is connected to a thermal management component 130 for storing a heat exchange medium.

[0137] The storage structure may be a pipeline for the flow of heat exchange medium, a storage bottle, etc.

[0138] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0139] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, characterized in that: The battery device comprises: Box (110); A battery cell (121) is housed in the box (110); A heat management component (130) is attached to the battery cell (121), and a heat exchange medium flows inside the heat management component (130); and a liquid storage structure (140) accommodated in the box (110); When the volume of the battery cell (121) expands, the liquid storage structure (140) can be in communication with the thermal management component (130) to assist the thermal management component (130) in accommodating the heat exchange medium; The box body (110) comprises a box body (112) and a limiting beam (113); the limiting beam (113) is arranged in the box body (112) to define a containing space; The battery cell (121) is arranged in the accommodation space; The liquid storage structure (140) is arranged in the limiting beam (113) or in the box wall of the box body (112).

2. The battery device according to claim 1, wherein: The liquid storage structure (140) is a liquid storage bottle; or, The closed cavity formed by the hollow interior of the limiting beam (113) serves as the liquid storage structure (140).

3. The battery device according to claim 1, wherein: The battery device comprises a first pipeline (150) and a control valve (170); one end of the first pipeline (150) is in communication with the thermal management component (130), and the other end of the first pipeline (150) extends outside the box (110); and the liquid storage structure (140) is connected to the first pipeline (150) via the control valve (170).

4. The battery device according to claim 3, characterized in that The control valve (170) is a solenoid valve or a one-way valve.

5. The battery device according to claim 3, wherein: The battery device comprises a second pipeline (160), one end of the second pipeline (160) is connected to the thermal management component (130), and the other end of the second pipeline (160) extends outside the box (110), and the heat exchange medium flows through the second pipeline (160), the thermal management component (130) and the first pipeline (150) in sequence.

6. The battery device according to any one of claims 1 to 5, characterized in that: The heat management component (130) has a closed accommodating cavity (131) and a heat exchange flow channel (132) for the flow of heat exchange medium. The heat management component (130) is configured to be capable of squeezing the accommodating cavity (131) so as to allow the accommodating cavity (131) to communicate with the heat exchange channel (132).

7. The battery device according to claim 6, characterized in that The heat management component (130) includes a current collecting member (133) and a heat exchange plate (134) with a hollow interior; The flow collecting member (133) is formed with a flow collecting channel for the heat exchange medium to flow; The accommodating cavity (131) and the heat exchange channel (132) are formed in the heat exchange plate (134), the flow collecting member (133) is arranged at the end of the heat exchange plate (134), and the flow collecting channel is connected to the heat exchange channel (132).

8. The battery device according to claim 7, characterized in that The thermal management component (130) includes a plurality of support plates (135) and a plurality of closing plates (136); All the support plates (135) are arranged at intervals within the heat exchange plate (134); In some of the support plates (135), a pipe with both ends open is formed between each two adjacent support plates (135) to serve as the heat exchange flow channel (132); In another part of the support plates (135), a pipe is formed between every two adjacent support plates (135), and the closing plates (136) close both ends of the pipe to serve as the accommodating cavity (131).

9. The battery device according to claim 7, wherein: The heat management component (130) includes an accommodating inner tube (137) and a plurality of support plates (135); the accommodating inner tube (137) is arranged in the internal space of the heat exchange plate (134); the accommodating inner tube (137) is a closed tube body used to define the accommodating cavity (131); All the support plates (135) are arranged at intervals within the heat exchange plate (134), wherein two ends of a portion of the support plates (135) are respectively supported on one side wall of the heat exchange plate (134) and the side wall of the accommodating inner tube (137), and two ends of another portion of the support plates (135) are respectively supported on both side walls of the heat exchange plate (134); A heat exchange channel (132) is formed between every two adjacent support plates (135).

10. The battery device according to claim 8 or 9, characterized in that: The thermal management component (130) includes a puncture structure (138); The puncturing structure (138) is provided on a side of the support plate (135) facing the accommodating cavity (131) for puncturing the accommodating cavity (131); and / or, The puncturing structure (138) is arranged on a surface of the side wall of the heat exchange plate (134) facing the accommodating cavity (131) for puncturing the accommodating cavity (131).

11. The battery device according to claim 10, characterized in that The puncture structure (138) is a columnar structure, and the axis of the puncture structure (138) is arranged to intersect with the accommodating cavity (131).

12. A thermal management component, used in a battery device, characterized in that: The heat management component (130) includes a current collecting member (133) and a heat exchange plate (134) with a hollow interior; The flow collecting member (133) is formed with a flow collecting channel for the heat exchange medium to flow; A closed accommodating cavity (131) and a heat exchange flow channel (132) are formed in the heat exchange plate (134); the heat exchange flow channel (132) is used for allowing a heat exchange medium to flow; the flow collecting member (133) is provided at an end of the heat exchange plate (134) so ​​that the flow collecting flow channel is connected to the heat exchange flow channel (132); The accommodating cavity (131) can be squeezed to communicate with the heat exchange channel (132).

13. The thermal management component according to claim 12, characterized in that The thermal management component (130) includes a plurality of support plates (135) and a plurality of closing plates (136); All the support plates (135) are arranged at intervals within the heat exchange plate (134); In some of the support plates (135), a pipe with both ends open is formed between each two adjacent support plates (135) to serve as the heat exchange flow channel (132); In another part of the support plates (135), a pipe is formed between every two adjacent support plates (135), and the closing plates (136) close both ends of the pipe to serve as the accommodating cavity (131).

14. The thermal management component according to claim 12, wherein: The heat management component (130) includes an accommodating inner tube (137) and a plurality of support plates (135); the accommodating inner tube (137) is arranged in the internal space of the heat exchange plate (134); the accommodating inner tube (137) is a closed tube body used to define the accommodating cavity (131); All the support plates (135) are arranged at intervals within the heat exchange plate (134), wherein two ends of a portion of the support plates (135) are respectively supported on one side wall of the heat exchange plate (134) and the side wall of the accommodating inner tube (137), and two ends of another portion of the support plates (135) are respectively supported on both side walls of the heat exchange plate (134); A heat exchange channel (132) is formed between every two adjacent support plates (135).

15. The thermal management component according to claim 13 or 14, characterized in that: The thermal management component (130) includes a puncture structure (138); The puncturing structure (138) is provided on a side of the support plate (135) facing the accommodating cavity (131) for puncturing the accommodating cavity (131); and / or, The puncturing structure (138) is arranged on the inner side of the side wall of the heat exchange plate (134) facing the accommodating cavity (131) to be used for puncturing the accommodating cavity (131).

16. The thermal management component according to claim 15, characterized in that The puncture structure (138) is a columnar structure, and the axis of the puncture structure (138) is arranged to intersect with the accommodating cavity (131).

17. An electrical device, characterized in that: The invention comprises a storage structure and the battery device according to any one of claims 1 to 11, wherein the storage structure is in communication with the thermal management component (130).

Images