Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a battery monomer and a heat exchange piece, the heat exchange piece comprises a flow channel and a cavity, the flow channel is used for circulating a heat exchange medium, the cavity is used for filling a drying medium, and the heat exchange piece is provided with an opening communicated with the cavity. According to the battery device provided by the embodiment of the invention, the heat exchange piece integrates the heat exchange medium and the drying medium, so that the dual functions of heat dissipation and humidity control can be realized, the short-circuit risk of electrical elements in the battery device is reduced, and the working efficiency of the battery device is improved.

Description

Technical Field

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

[0002] In the related art, the battery device generates heat during operation. If the heat cannot be dissipated in time, the battery device may be overheated, affecting its performance and life. Therefore, a heat exchanger is usually provided inside the battery device to cool the battery cells. During the operation of the heat exchanger, water vapor in the air inside the battery device will adhere to the surface of the heat exchanger to form condensed water, which will cause the performance of the battery device to decline or even damage it. There is room for improvement. Utility Model Content

[0003] The present application provides a battery device and an electrical device to reduce the risk of short circuit of electrical components inside the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, including:

[0005] Battery cells;

[0006] A box body, forming a receiving cavity for receiving the battery cell;

[0007] A heat exchange component is arranged in the accommodating cavity. The heat exchange component includes a flow channel and a cavity. The flow channel is used to circulate heat exchange medium. The cavity is used to fill dry medium. The heat exchange component has an opening. The opening connects the cavity and the accommodating cavity.

[0008] In the above technical solution, the heat exchange element can achieve the dual functions of heat dissipation and humidity control by integrating the heat exchange medium and the drying medium, reduce the short circuit risk of the electrical components inside the battery device, improve the working efficiency of the battery device, and simplify the structure of the battery device, reducing the manufacturing cost and maintenance difficulty.

[0009] In some embodiments, the battery device further includes: an electrical connection assembly, the electrical connection assembly being used to electrically connect to poles of at least two of the battery cells, the electrical connection assembly and the heat exchange element being located on the same side of the battery cell.

[0010] In the above technical solution, the heat exchange component has good thermal contact with the electrical connection assembly and the battery cell respectively, which can reduce the risk of overheating of the electrical connection assembly and help the electrical connection assembly provide a stable electrical connection.

[0011] In some embodiments, the flow channel is arranged in parallel with the cavity.

[0012] In the above technical solution, the flow channel is used to guide the flow of heat exchange medium, and the cavity is used to accommodate the drying medium. The parallel arrangement of the two can make the cavity and the flow channel effectively cooperate, which helps to adjust humidity and temperature, improve thermal management efficiency, and reduce the generation of condensed water.

[0013] In some embodiments, the cavity is located above the flow channel along the height direction, and the opening is located at the top of the heat exchange element along the height direction.

[0014] In the above technical solution, the cavity and the flow channel are arranged in cooperation, which can effectively improve the cooling efficiency and maintain the temperature of the battery cell within a safe range, while also facilitating the flow of the fluid, thereby optimizing the heat exchange effect.

[0015] In some embodiments, the heat exchange element and the battery cell are distributed up and down in the height direction, and the opening is located at the top of the heat exchange element in the height direction.

[0016] In the above technical solution, the heat exchange element and the densely arranged plurality of battery cells are distributed up and down along the height direction, which can reduce heat accumulation, improve the cooling efficiency of the heat exchange element, and save lateral space.

[0017] In some embodiments, the opening includes a plurality of openings spaced apart and distributed along an extension direction of the cavity.

[0018] In the above technical solution, the plurality of openings spaced apart and distributed along the first direction can uniformly expose the drying medium in the cavity to the air, which helps to fully utilize the drying medium.

[0019] In some embodiments, the drying medium is a fiber desiccant or a hygroscopic foam.

[0020] In the above technical solution, the fiber desiccant and the hygroscopic foam can reduce the risk of moisture accumulation causing the battery monomer to be damaged by moisture, thereby improving the stability and safety of the battery device.

[0021] In some embodiments, the heat exchange element is disposed between poles of the same battery cell;

[0022] and / or,

[0023] The heat exchange element is disposed between adjacent poles of adjacent battery cells along the second direction.

[0024] In the above technical solution, the heat exchange element can cool the middle part and the edge part of the battery cell separately or simultaneously, thereby improving the heat exchange efficiency of the heat exchange element.

[0025] In some embodiments, at least a portion of the heat exchange member is located between the electrical connection assembly and the battery cell in the height direction.

[0026] In the above technical solution, the heat exchanger is located between the electrical connection assembly and the battery cell along the height direction, and has good thermal contact with both the electrical connection assembly and the battery cell, which can reduce the risk of overheating of the electrical connection assembly and help the electrical connection assembly provide a stable electrical connection.

[0027] In some embodiments, the electrical connection assembly, the pole, and the end surface of the battery cell form an installation space, and part of the heat exchange component is installed in the installation space.

[0028] In the above technical solution, when the heat exchange component is located in the installation space, it has good thermal contact with the surfaces of the battery cell and the electrical connection assembly, thereby maximizing the heat conduction efficiency.

[0029] In some embodiments, the electrical connection assembly includes a plurality of electrical connectors arranged along a first direction, each of the electrical connectors is electrically connected to at least two of the battery cells, and a projection of the opening along a height direction is staggered from a projection of the electrical connector along the height direction.

[0030] In the above technical solution, the projection of the opening along the height direction is staggered with the electrical connector, which can improve the spatial layout and improve the drying efficiency of the drying medium in the heat exchange element, further improving the performance of the entire battery device.

[0031] In a second aspect, an embodiment of the present application provides an electrical device, comprising: a battery device as described in any one of the above, wherein the battery device is used to store or provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of an energy storage system provided in some embodiments of the present application;

[0034] Figure 2 A schematic diagram of the structure of a charging network provided in some embodiments of the present application;

[0035] Figure 3 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0036] Figure 4 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0037] Figure 5 One of the structural schematic diagrams of the battery device provided in some embodiments of the present application;

[0038] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0039] Figure 7 The second structural schematic diagram of the battery device provided in some embodiments of the present application;

[0040] Figure 8 for Figure 7 Sectional view at the middle BB;

[0041] Fig. 9 The third structural schematic diagram of the battery device provided in some embodiments of the present application;

[0042] Fig.10 for Fig. 9 Sectional view at CC;

[0043] Fig.11 for Fig.10 A partial enlarged view of point D in the middle.

[0044] Reference numerals:

[0045] Energy storage device 1, power conversion device 2, power generation equipment 3, charging pile 4, connector 5;

[0046] Vehicles 1000;

[0047] Battery device 100;

[0048] Box body 10, first box body 11, second box body 12;

[0049] Battery cell 20, pole 210;

[0050] Heat exchange element 30, flow channel 310, cavity 320, opening 330;

[0051] Electrical connection assembly 40, electrical connection member 410;

[0052] Installation space 50;

[0053] Controller 200, motor 300;

[0054] The first direction is X, and the second direction is Y. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0057] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0058] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0060] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0061] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0062] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0063] The battery cell can be cylindrical, flat, rectangular or other shapes, and the present application embodiment does not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the present application embodiment does not limit this.

[0064] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode collector includes a positive electrode collector body and a positive electrode ear. The positive electrode active material layer is coated on the surface of the positive electrode collector body. The positive electrode ear is not coated with the positive electrode active material layer and protrudes from the positive electrode collector body. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode collector includes a negative electrode collector body and a negative electrode ear. The negative electrode active material layer is coated on the surface of the negative electrode collector body. The negative electrode ear is not coated with the negative electrode active material layer and protrudes from the negative electrode collector body. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current can be passed without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0065] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0066] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery cells are used to store or provide electrical energy.

[0067] The inventors found that in order to enable the battery device to obtain sufficient power, multiple battery cells in the box of the battery device are usually stacked in an arrangement. However, the battery cells will generate a lot of heat during the continuous charging and discharging process, which will cause the internal temperature of the battery device to rise, and the structure of multiple battery cells stacked will aggravate the occurrence of this phenomenon, which will seriously affect the performance and service life of the battery device, and even cause the battery device to have a large safety hazard during use, which is not conducive to the safety of consumers. Therefore, in the prior art, a heat exchanger for cooling the battery cell is usually set inside the battery device, such as using a liquid cooling plate to dissipate heat from the top of the pole in the battery cell, solve the problem of temperature rise of the pole and the bar during the charging and discharging process, and reduce the risk of thermal runaway. However, in the prior art, when the air humidity in the battery device is high, condensed water is attached to the surface of the battery cell, the bar and the heat exchanger in the charging and discharging state, which will cause the risk of short circuit between the battery cell itself or different battery cells.

[0068] Based on the above considerations, in order to solve the problem of the risk of short circuit of battery cells caused by condensed water in the battery device, the inventors have designed a battery device after in-depth research, including a battery cell and a heat exchanger. The heat exchanger includes a flow channel and a cavity. The flow channel is used to circulate heat exchange medium, and the cavity is used to fill dry medium. The heat exchanger has an opening connected to the cavity.

[0069] In a battery device of this structure, by configuring the heat exchange element to include a flow channel and a cavity arranged in parallel, and filling the cavity with a dry medium, the humidity in the battery device can be reduced, thereby reducing the risk of short circuit of the battery cells.

[0070] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0071] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0072] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0073] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0074] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0075] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0076] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0077] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0078] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0079] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery devices are used to store or provide electrical energy.

[0080] The embodiment of the present application provides an energy storage device, including one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0081] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption and provide electrical energy to relevant users or electrical devices during peak electricity consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0082] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0083] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0084] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0085] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0086] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (SBMU), a fusion switch and other modules.

[0087] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module and other modules.

[0088] As an example, the fire protection system includes a control panel, detectors, alarm devices, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0089] As an example, the power distribution device may be used to distribute power to the power modules of the energy storage device.

[0090] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0091] In some embodiments, Figure 1As shown, the energy storage system may include one or more energy storage devices 1 and a power converter 2 (Power Converter System, PCS for short), and the power converter 2 is used to be connected between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electric energy, and the electric energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. Among them, the specific type of the power generation device 3 is not limited in this application.

[0092] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage systems, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0093] Please refer to Figure 2 The embodiment of the present application provides a charging network, including a charging pile 4 and an energy storage device 1, wherein the charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electric energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device in the energy storage device 1 through a cable, and the battery device can provide its stored electric energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to an electric device (such as a vehicle) so as to replenish energy to the electric device.

[0094] The energy storage device can be located inside the charging pile (such as an integrated storage and charging machine) or outside the charging pile.

[0095] The embodiment of the present application provides an electric device using a battery cell or a battery device or an energy storage device or an energy storage system as a power source, and the electric device may be, but is 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, and a spacecraft, 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., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0096] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0097] Please refer to Figure 3 , Figure 3A 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, and the battery device 100 may be provided at the bottom, head or tail of the vehicle. The battery device 100 may be used to power the vehicle, for example, the battery device 100 may be used as an operating power source for the vehicle. The vehicle 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 operating power requirements of the vehicle during driving.

[0098] In some embodiments of the present application, the battery device 100 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0099] Please refer to Figure 4 , Figure 4 The structural exploded diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a plurality of battery cells 20, and the battery cells 20 are used to be accommodated in the box body 10. Among them, the box body 10 is used to provide an assembly space for the battery cells 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cells 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0100] In the battery device 100, multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 20 are connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 20.

[0101] Please refer to Figure 4 , Figure 4 The structure of the battery device 100 provided in some embodiments of the present application is exploded. The battery device 100 includes multiple rows of battery cells 20, and the multiple rows of battery cells 20 are arranged along the first direction X. Each row of battery cells 20 includes multiple battery cells 20 arranged along the second direction Y. The first direction X and the second direction Y are respectively the length direction of the box body 10 and the width direction of the box body 10, and the first direction X and the second direction Y are perpendicular to each other.

[0102] According to some embodiments of the present application, referring to Figure 5 and Figure 6 , Figure 5 This is one of the structural schematic diagrams of the battery device 100 provided in some embodiments of the present application. Figure 6 for Figure 5 The present application provides a battery device 100, comprising a battery cell 20, a housing 10 and a heat exchanger 30, wherein the housing 10 forms a receiving cavity for receiving the battery cell 20, the heat exchanger 30 is disposed in the receiving cavity, and the heat exchanger 30 comprises a flow channel 310 and a cavity 320, the flow channel 310 is used for circulating a heat exchange medium, the cavity 320 is used for filling a dry medium, and the heat exchanger 30 has an opening 330, the opening 330 connects the cavity 320 and the receiving cavity.

[0103] The battery cell 20 is the core component of the battery device 100 and is responsible for storing and releasing electrical energy. The battery cell 20 is composed of a positive electrode, a negative electrode, a separator and an electrolyte, and is charged and discharged through electrochemical reactions. At the same time, multiple battery cells 20 are usually connected in series or in parallel to form a battery pack.

[0104] The box body 10 is mainly used to provide structural support for the battery device 100 and has good structural strength and sealing. The box body 10 forms a receiving cavity, which is used to accommodate and fix the battery cell 20, thereby reducing the displacement or damage of the battery cell 20 during use.

[0105] For example, the housing 10 may be made of a material with high strength and durability, such as aluminum alloy, carbon fiber or other composite materials, to maintain the structural stability of the battery device 100 during use.

[0106] The heat exchange element 30 is arranged in the accommodating cavity, and can be used to adjust the temperature of the battery cell 20 to help effectively dissipate heat. A flow channel 310 and a cavity 320 can be formed inside the heat exchange element 30, wherein the flow channel 310 is used to circulate the heat exchange medium, and the cavity 320 is used to fill the drying medium. An opening 330 is provided on the heat exchange element 30, and the opening 330 can connect the cavity 320 and the accommodating cavity, which helps the drying medium to absorb water vapor.

[0107] Exemplarily, the heat exchange element 30 can perform heat exchange with the battery cell 20 by liquid cooling to reduce the risk of performance degradation and safety accidents caused by overheating of the battery cell 20. The material of the heat exchange element 30 can be aluminum, copper, steel or thermal conductive silica gel, etc. The heat exchange medium in the heat exchange element 30 can be water or ethylene glycol mixture, etc., and the drying medium can be a fiber desiccant or other solid desiccant.

[0108] In actual operation, the heat exchange medium flows through the flow channel 310 to absorb the heat generated by the battery cell 20, thereby achieving heat dissipation. The drying medium absorbs water vapor inside the battery device 100 through the opening 330, which can keep the inside of the battery device 100 dry, thereby improving the performance and safety of the battery device 100.

[0109] It should be noted that the orientation of the opening 330 on the heat exchanger 30 is not fixed, and the opening 330 has multiple orientations to adapt to different environmental requirements. For example, the opening 330 can be opened upward to reduce the risk of saturated condensed water leaking into the battery cell 20.

[0110] In addition, the heat exchange element 30 can be installed in a variety of ways, including but not limited to:

[0111] In example one, the heat exchange element 30 is located on the top of the battery cell 20 .

[0112] like Figure 5 As shown, a pole 210 is arranged on the top of the battery cell 20, and the poles 210 of adjacent battery cells 20 are electrically connected through an electrical connection assembly 40. The heat exchange component 30 is arranged on the top of the battery cell 20, and the heat exchange component 30 is located between the battery cell 20 and the electrical connection assembly 40, which can improve the heat exchange efficiency of the heat exchange component 30 to the pole 210 of the battery cell 20 and the electrical connection assembly 40.

[0113] In the second example, the heat exchange element 30 is located at the bottom of the battery cell 20 .

[0114] A pole 210 is arranged at the top of the battery cell 20, and the poles 210 of adjacent battery cells 20 are electrically connected through an electrical connection assembly 40. The heat exchange component 30 is arranged at the bottom of the battery cell 20, and natural convection can be used to help heat flow downward, thereby reducing heat accumulation at the top of the battery cell 20.

[0115] Example three: the heat exchange element 30 is located on the side of the battery cell 20 .

[0116] A pole 210 is disposed on the top of the battery cell 20 , and the poles 210 of adjacent battery cells 20 are electrically connected via an electrical connection assembly 40 . The heat exchange component 30 is disposed on the side of the battery cell 20 , which can save space and reduce heat accumulation on the top of the battery cell 20 .

[0117] Example 4: The heat exchange element 30 is spaced apart from the battery cell 20 .

[0118] A pole 210 is disposed on the top of the battery cell 20, and the poles 210 of adjacent battery cells 20 are electrically connected through an electrical connection assembly 40, so that the heat exchange element 30 is separated from the battery cell 20, and an air gap can be established between the heat exchange element 30 and the battery cell 20, which helps to provide a natural convection cooling effect.

[0119] In the above technical solution, the battery device 100 can operate under more efficient thermal management, while reducing potential failures caused by water vapor and lowering the risk of short circuits of electrical components inside the battery device 100 .

[0120] Specifically, the short circuit risks of the electrical components inside the battery device 100 include the short circuit risks between the battery cells 20, the short circuit risks between the electrical connectors 410, the short circuit risks between the electrical connectors 410 and the battery cells 20, and the short circuit risks between the box 10 and the electrical components such as the electrical connectors 410 and the battery cells 20.

[0121] According to the battery device 100 provided in the embodiment of the present application, the battery device 100 includes a battery cell 20 and a heat exchanger 30, wherein the heat exchanger 30 includes a flow channel 310 and a cavity 320, the flow channel 310 is used to circulate a heat exchange medium, the cavity 320 is used to fill a drying medium, and the heat exchanger 30 has an opening 330 connected to the cavity 320. The heat exchanger 30 can achieve the dual functions of heat dissipation and humidity control by integrating the heat exchange medium and the drying medium, reduce the short circuit risk of the internal electrical components of the battery device 100, improve the working efficiency of the battery device 100, and simplify the structure of the battery device 100, reducing the manufacturing cost and maintenance difficulty.

[0122] According to some embodiments of the present application, referring to Figure 5The battery device 100 further includes an electrical connection assembly 40 , which is used to electrically connect to the poles 210 of at least two battery cells 20 . The electrical connection assembly 40 and the heat exchange element 30 are located on the same side of the battery cell 20 .

[0123] The electrical connection component 40 plays the role of current collection and distribution in the battery device 100. Multiple battery cells 20 are electrically connected through the electrical connection component 40 to form an electrical path between the multiple battery cells 20, thereby realizing series or parallel connection between the multiple battery cells 20 through the electrical connection component 40 to meet the voltage and capacity requirements of the battery device 100.

[0124] Exemplarily, the electrical connection assembly 40 may be made of a highly conductive material, such as copper or aluminum, to efficiently conduct current and reduce power loss. At the same time, the electrical connection assembly 40 has sufficient mechanical strength to withstand factors such as thermal expansion and vibration between the battery cells 20 .

[0125] Specifically, multiple rows of battery cells 20 are arranged side by side along the second direction Y, each row of battery cells 20 includes multiple battery cells 20 arranged side by side along the first direction X, and the top of each battery cell 20 is provided with poles 210 distributed and spaced apart along the second direction Y, and the electrical connection assembly 40 is used to electrically connect to the poles 210 of at least two battery cells 20.

[0126] Exemplarily, some of the electrical connection components 40 may be used to electrically connect adjacent poles 210 of adjacent battery cells 20 distributed along the second direction Y, and some of the electrical connection components 40 may be used to electrically connect adjacent poles 210 distributed along the first direction X.

[0127] In some embodiments, the electrical connection assembly 40 and the heat exchange element 30 are located on the same side of the battery cell 20, and the heat exchange element 30 has a variety of distribution forms, including but not limited to:

[0128] In example one, the heat exchange element 30 is disposed between the poles 210 of the same battery cell 20 .

[0129] The poles 210 of each battery cell 20 are spaced apart and distributed along the second direction Y, and the heat exchange element 30 extends along the first direction X. When the heat exchange element 30 is arranged between the poles 210 of the same battery cell 20, the heat exchange element 30 is mainly used to cool the electrical connection assembly 40, and can also cool multiple battery cells 20 distributed along the first direction X.

[0130] In the second example, the heat exchange element 30 is disposed along the second direction Y between adjacent poles 210 of adjacent battery cells 20 .

[0131] like Figure 5As shown, the poles 210 of each battery cell 20 are spaced apart and distributed along the second direction Y, and the heat exchange element 30 extends along the first direction X. When the heat exchange element 30 is arranged between adjacent poles 210 of adjacent battery cells 20 along the second direction Y, the heat exchange element 30 is used to cool any two adjacent rows of battery cells 20 distributed along the second direction Y.

[0132] Example 3: Part of the heat exchange element 30 is disposed between the poles 210 of the same battery cell 20 , and part of the heat exchange element 30 is disposed along the second direction Y between adjacent poles 210 of adjacent battery cells 20 .

[0133] The poles 210 of each battery cell 20 are spaced apart and distributed along the second direction Y, the heat exchange element 30 extends along the first direction X, part of the heat exchange element 30 is arranged between the poles 210 of the same battery cell 20, and part of the heat exchange element 30 is arranged between adjacent poles 210 of adjacent battery cells 20 along the second direction Y. The heat exchange element 30 can cool the electrical connection assembly 40 and the battery cell 20 at the same time, thereby improving the heat exchange efficiency of the heat exchange element 30.

[0134] According to some embodiments of the present application, referring to Figure 5-Figure 11 , Figure 7 The second structural schematic diagram of the battery device provided in some embodiments of the present application. Figure 8 for Figure 7 Cross-sectional view at the middle BB. Fig. 9 The third structural schematic diagram of the battery device provided in some embodiments of the present application. Fig.10 for Fig. 9 Cross-sectional view at CC. Fig.11 for Fig.10 A partial enlarged view of point D in the middle. The flow channel 310 is arranged in parallel with the cavity 320 .

[0135] The flow channel 310 is used to guide the flow of the heat exchange medium, and the cavity 320 is used to fill the drying medium. The flow channel 310 and the cavity 320 are parallel, which helps to improve the stability and uniformity of the flow of the heat exchange medium.

[0136] In some embodiments, Figure 7-Figure 11 As shown, the flow channel 310 and the cavity 320 can be arranged in a variety of ways, including but not limited to:

[0137] Example 1: The flow channel 310 and the cavity 320 are arranged in parallel along the height direction.

[0138] like Figure 9-11 As shown, at this time, the flow channel 310 and the cavity 320 are arranged up and down, and the heat exchange element 30 is provided with an opening 330 connected to the cavity 320. The opening 330 is used to allow the drying medium in the cavity 320 to contact with the air to absorb water vapor in the air. The opening 330 can be opened to take into account both heat exchange and drying functions.

[0139] Example 2: The flow channel 310 and the cavity 320 are arranged in parallel along the horizontal direction.

[0140] like Figure 7 and Figure 8 As shown, at this time, the flow channel 310 and the cavity 320 are arranged on the left and right, and the heat exchange element 30 is provided with an opening 330 connected to the cavity 320. The opening 330 is used to make the drying medium in the cavity 320 contact with the air to absorb water vapor in the air. The opening 330 can be opened upward or to the side, taking into account the heat exchange and drying functions. At the same time, the heat exchange area of ​​the flow channel 310 is larger, which can improve the efficiency of heat exchange.

[0141] In the above description, the flow channel 310 is used to guide the flow of the heat exchange medium, and the cavity 320 is used to accommodate the drying medium. The parallel arrangement of the two allows the cavity 320 and the flow channel 310 to cooperate effectively, which helps to adjust the humidity and temperature, improve the thermal management efficiency, and reduce the generation of condensed water.

[0142] Furthermore, in some embodiments, the flow channel 310 and the cavity 320 may be arranged in a non-parallel manner.

[0143] Exemplarily, the flow channel 310 and the cavity 320 are arranged side by side, and the cavity 320 can be a discontinuous plurality of sections, and the plurality of sections of the cavity 320 are spaced apart and distributed along the extension direction of the flow channel 310. At the same time, the heat exchange element 30 is provided with an opening 330 connected to the cavity 320, and the opening 330 can be opened upward or to the side, and the cavity 320 is connected to the opening 330 in a one-to-one correspondence, which can improve the drying efficiency.

[0144] According to some embodiments of the present application, referring to Figure 9-11 , the cavity 320 is located above the flow channel 310 along the height direction, and the opening 330 is located at the top of the heat exchange element 30 along the height direction.

[0145] The flow channel 310 and the cavity 320 can be arranged in parallel along the height direction. At the same time, the flow channel 310 contacts the adjacent battery cell 20 to achieve heat exchange. The opening 330 is open to the side away from the battery cell 20 to absorb water vapor in the air. Specifically, the cavity 320 can be located above the flow channel 310. At this time, the heat exchange element 30 is provided with an opening 330 connected to the cavity 320. The opening 330 can be located at the top of the heat exchange element 30 along the height direction and open upward, which can reduce the risk of saturated condensed water leaking to the battery cell 20, thereby taking into account both heat exchange and drying functions.

[0146] In the above description, the cavity 320 and the flow channel 310 are arranged in cooperation, which can effectively improve the cooling efficiency, maintain the temperature of the battery cell 20 within a safe range, and also facilitate the flow of the fluid, thereby optimizing the heat exchange effect.

[0147] According to some embodiments of the present application, referring to Figure 5 The heat exchange element 30 and the battery cell 20 are distributed up and down in the height direction, and the opening 330 is located at the top of the heat exchange element 30 in the height direction.

[0148] The heat exchange element 30 is provided with an opening 330 connected to the cavity 320. The opening 330 is used to allow the drying medium in the cavity 320 to contact with the air to absorb water vapor in the air. The opening 330 can be located at the top of the heat exchange element 30 in the height direction, and the opening 330 is open upward, which helps to reduce the risk of saturated condensed water leaking to the battery cell 20, thereby taking into account both heat exchange and drying functions.

[0149] Specifically, multiple rows of battery cells 20 are arranged side by side along the second direction Y, and each row of battery cells 20 includes multiple battery cells 20 arranged side by side along the first direction X. The heat exchange element 30 and the battery cells 20 are distributed up and down along the height direction, and the heat exchange element 30 can be set corresponding to each row of battery cells 20, or can be set corresponding to two adjacent rows of battery cells 20. The first direction X, the second direction Y and the height direction are perpendicular to each other.

[0150] In the above description, the heat exchange element 30 and the densely arranged plurality of battery cells 20 are distributed up and down in the height direction, which can reduce heat accumulation, improve the cooling efficiency of the heat exchange element 30, and save lateral space.

[0151] According to some embodiments of the present application, referring to Figure 5 The openings 330 include a plurality of openings 330 that are spaced apart and distributed along the extending direction of the cavity 320 .

[0152] The heat exchange element 30 is provided with an opening 330 connected to the cavity 320. The opening 330 is used to allow the drying medium in the cavity 320 to contact with the air to absorb water vapor in the air. It should be noted that the orientation of the opening 330 is not fixed, and the opening 330 is not connected to the flow channel 310. Exemplarily, the multiple openings 330 can all be opened upward, the multiple openings 330 can all be opened to the side, and the multiple openings 330 can also be partially opened upward and partially opened to the side.

[0153] The extension direction of the cavity 320 is the first direction X. A plurality of openings 330 spaced apart along the first direction X are provided on the heat exchange element 30 to increase the contact area between the drying medium and the air, thereby enhancing the moisture absorption effect of the drying medium.

[0154] At the same time, the plurality of openings 330 spaced apart along the first direction X can evenly expose the drying medium in the cavity 320 to the air, which helps to fully utilize the drying medium.

[0155] In addition, the specific shape of the plurality of openings 330 spaced apart and distributed along the extending direction of the cavity 320 is not limited.

[0156] According to some embodiments of the present application, the drying medium may be a fiber desiccant or a hygroscopic foam.

[0157] Fiber desiccant is a highly efficient physical adsorption desiccant, mainly composed of highly hygroscopic fiber materials. It can absorb water or moisture in other gases to reduce the humidity in the environment. Hygroscopic foam is generally made of porous materials. Hygroscopic foam has a large number of tiny pores that can absorb moisture in the air.

[0158] Exemplarily, fiber desiccant can be subdivided into environmentally friendly desiccant and coated fiber desiccant sheets, etc., wherein environmentally friendly desiccant is made of pure natural plant fiber through a special process, coated fiber desiccant sheets have strong moisture absorption capacity, are convenient and practical, and do not take up space, and hygroscopic foam can include melamine hygroscopic foam or polyurethane hygroscopic foam, etc., hygroscopic foam is usually lighter and has good cushioning properties.

[0159] Compared with conventional desiccants, fiber desiccants usually have stronger moisture absorption capacity and can quickly absorb moisture from the surrounding air. At the same time, fiber desiccants have better physical properties and can be made into forms suitable for deployment in various systems.

[0160] Exemplarily, the fiber desiccant may be in a fiber, granular, or cloth-like form, etc., so as to reduce the risk of leakage of the fiber desiccant.

[0161] At the same time, fiber desiccant has a long-lasting drying effect, can maintain moisture absorption performance for a long time, and reduce the number of times the drying medium needs to be replaced.

[0162] In the above description, the fiber desiccant can reduce the risk of moisture damage to the battery cells 20 due to moisture accumulation, thereby improving the stability and safety of the battery device 100 .

[0163] According to some embodiments of the present application, referring to Figure 5 and Figure 8 The heat exchange element 30 can be distributed in a variety of ways, including but not limited to:

[0164] In example one, at least a portion of the heat exchange element 30 is located between the electrical connection assembly 40 and the battery cell 20 along the height direction.

[0165] Specifically, multiple rows of battery cells 20 are arranged side by side along the second direction Y, each row of battery cells 20 includes multiple battery cells 20 arranged side by side along the first direction X, and the top of each battery cell 20 is provided with poles 210 distributed and spaced apart along the second direction Y, and the electrical connection assembly 40 is used to electrically connect to the poles 210 of at least two battery cells 20.

[0166] At least part of the heat exchanger 30 is located between the electrical connection assembly 40 and the battery cell 20 in the height direction. At this time, these heat exchanger components 30 are arranged between the poles 210 of the same battery cell 20. There is good thermal contact between the heat exchanger 30 and the electrical connection assembly 40 and the battery cell 20, which can reduce the risk of overheating of the electrical connection assembly 40 and help the electrical connection assembly 40 provide a stable electrical connection.

[0167] Example 2: At least part of the heat exchange element 30 is located on a side of the electrical connection assembly 40 that is away from the battery cell 20 .

[0168] At least part of the heat exchange element 30 is located on the side of the electrical connection assembly 40 away from the battery cell 20 in the height direction. The heat exchange element 30 can exchange heat with the electrical connection assembly 40 to reduce the risk of overheating of the electrical connection assembly 40 and help the electrical connection assembly 40 provide a stable electrical connection.

[0169] Example three: at least part of the heat exchange element 30 is located on one side of the electrical connection assembly 40 along the second direction Y.

[0170] At least part of the heat exchanger 30 is located on one side of the electrical connection assembly 40 along the second direction Y. In this case, the heat exchanger 30 is arranged between adjacent poles 210 of adjacent battery cells 20 along the second direction Y, and there is good thermal contact between the heat exchanger 30 and the battery cells 20.

[0171] According to some embodiments of the present application, referring to Fig.11 The electrical connection assembly 40 , the pole 210 and the end surface of the battery cell 20 form an installation space 50 , and part of the heat exchange component 30 is installed in the installation space 50 .

[0172] The electrical connection assembly 40 is responsible for the electrical connection between different battery cells 20. The pole 210 is the contact point of the battery cell 20. The battery cell 20 is electrically connected to the electrical connection assembly 40 through the pole 210. The pole 210 is located on the end face of the battery cell 20. The electrical connection assembly 40 contacts the pole 210 of the adjacent battery cell 20. The three together form an installation space 50.

[0173] Specifically, multiple rows of battery cells 20 are arranged side by side along the second direction Y, and each row of battery cells 20 includes multiple battery cells 20 arranged side by side along the first direction X. The top of each battery cell 20 is provided with poles 210 distributed and spaced apart along the second direction Y. The electrical connection assembly 40 is used to electrically connect to the poles 210 of at least two battery cells 20, and the electrical connection assembly 40 is spaced apart from the end face of the battery cell 20 along the height direction to form an installation space 50, and part of the heat exchange component 30 passes through the installation space 50 along the first direction X.

[0174] In the above description, when the heat exchange element 30 is located in the installation space 50, it has good thermal contact with the surfaces of the battery cell 20 and the electrical connection assembly 40, which can maximize the heat conduction efficiency.

[0175] According to some embodiments of the present application, referring to Figure 5 The heat exchange element 30 may include multiple, the electrical connection components 40 may include multiple, the multiple heat exchange elements 30 and the multiple electrical connection components 40 are arranged in a one-to-one correspondence, and the multiple flow channels 310 of the multiple heat exchange elements 30 are connected in parallel.

[0176] The multiple heat exchange components 30 and the multiple electrical connection components 40 are arranged in a one-to-one correspondence along the height direction, which can effectively utilize the heat exchange surface and maximize the heat conduction efficiency.

[0177] At the same time, multiple heat exchange elements 30 are connected in parallel, which helps to improve the total heat exchange capacity of the heat exchange elements 30. When multiple heat exchange elements 30 are connected in parallel, each heat exchange element 30 can perform heat exchange independently, and the heat load can be evenly distributed among the multiple heat exchange elements 30, which helps to reduce the problem of overload of a single heat exchange element 30 and improve the working efficiency of the heat exchange element 30.

[0178] In some embodiments, the heat exchange element 30 may also have other connection methods. For example, the heat exchange element 30 may include multiple, the electrical connection components 40 may include multiple, multiple heat exchange elements 30 and multiple electrical connection components 40 are arranged in a one-to-one correspondence, and multiple flow channels 310 of the multiple heat exchange elements 30 are connected in series.

[0179] The multiple heat exchange components 30 and the multiple electrical connection components 40 are arranged in a one-to-one correspondence along the height direction, which can effectively utilize the heat exchange surface and maximize the heat conduction efficiency.

[0180] At the same time, multiple heat exchange elements 30 are connected in series, and the fluid passes through each heat exchange element 30 in turn, so that step-by-step heat exchange can be achieved, that is, the fluid obtains a gradual heat exchange effect in each heat exchange element 30.

[0181] According to some embodiments of the present application, referring to Figure 5 The electrical connection assembly 40 includes a plurality of electrical connectors 410 arranged along the first direction X, each electrical connector 410 is electrically connected to at least two battery cells 20, and the projection of the opening 330 along the height direction is staggered with the projection of the electrical connector 410 along the height direction.

[0182] Specifically, the electrical connection assembly 40 includes a plurality of electrical connectors 410 arranged along a first direction X, each electrical connector 410 is electrically connected to at least two battery cells 20 arranged along a second direction Y through a pole 210, and different electrical connectors 410 in the electrical connection assembly 40 are electrically connected. At the same time, the electrical connection assembly 40 forms a transition zone that is spaced apart and distributed along the first direction X and is located between two adjacent electrical connectors 410, and the installation space 50 and the transition zone are alternately distributed along the first direction X.

[0183] Exemplarily, the electrical connection component 40 may also include a flexible circuit board and a bus socket, wherein the bus socket is usually located at the end of the electrical connection component 40 for electrically connecting to an external circuit or device. The flexible circuit board is usually a longer base portion that supports the structure of the entire electrical connection component 40 and provides support for electrical connection. At the same time, the flexible circuit board has good flexibility, is light and thin, and easy to bend. The bus socket is electrically connected to one end of the flexible circuit board for connecting the battery cell 20 and the battery management system.

[0184] In addition, the heat exchange element 30 is provided with a plurality of openings 330 spaced apart along the first direction X, and the projection of the openings 330 along the height direction is located in the transition zone.

[0185] In the above description, the projection of the opening 330 along the height direction is staggered with the electrical connector 410 , which can improve the spatial layout and improve the drying efficiency of the drying medium in the heat exchange element 30 , further improving the performance of the entire battery device 100 .

[0186] According to some embodiments of the present application, the present application also provides an energy storage device 1, which includes a plurality of battery cells 20 of any of the above schemes, and the battery cells 20 are used to store or provide electrical energy; or the energy storage device 1 includes a plurality of battery devices 100 of any of the above schemes, and the battery devices 100 are used to store or provide electrical energy.

[0187] According to some embodiments of the present application, the present application also provides an energy storage system, which includes: a power conversion device 2 and an energy storage device 1 of any of the above schemes, and the power conversion device 2 is used to electrically connect the power generation equipment 3 and the energy storage device 1.

[0188] According to some embodiments of the present application, the present application further provides an electric device. The electric device includes a battery cell 20 of any of the above solutions, and the battery cell 20 is used to store or provide electric energy; or the electric device includes a battery device 100 of any of the above solutions, and the battery device 100 is used to store or provide electric energy; or the electric device includes an energy storage device 1 of any of the above solutions, and the battery cell 20 or the battery device 100 is used to store or provide electric energy; or the electric device includes an energy storage system of any of the above solutions, and the battery cell 20 or the battery device 100 is used to store or provide electric energy.

[0189] The power-consuming device may be any of the aforementioned devices or systems using the battery device 100 .

[0190] According to some embodiments of the present application, the present application also provides a charging network, which includes a charging pile 4 and an energy storage device 1 of any of the above schemes or an energy storage system of any of the above schemes, and the energy storage device 1 is used to provide electrical energy to the charging pile 4.

[0191] The energy storage device 1 may be located inside the charging pile 4 (eg, an integrated storage and charging device), or may be located outside the charging pile 4 .

[0192] According to some embodiments of the present application, see Figure 5-Figure 11 As shown, the present application provides a battery device 100, which includes a battery cell 20 and a heat exchanger 30, wherein the heat exchanger 30 includes a flow channel 310 and a cavity 320, wherein the flow channel 310 is used to circulate a heat exchange medium, and the cavity 320 is used to fill a dry medium, and the heat exchanger 30 has an opening 330 connected to the cavity 320, and the opening 330 is not oriented in a fixed direction, and can absorb water vapor in any direction. The flow channel 310 and the cavity 320 are arranged in parallel in the heat exchanger 30, including a parallel arrangement in the height direction and a parallel arrangement in the horizontal direction. When the cavity 320 is located above the flow channel 310 in the height direction, the flow channel 310 contacts the adjacent battery cell 20, and the opening 330 is open toward the side away from the battery cell 20. In addition, the heat exchanger 30 and the battery cell 20 are distributed up and down in the height direction, and the opening 330 can be located at the top of the heat exchanger 30 in the height direction. At the same time, the opening 330 includes a plurality of openings distributed at intervals along the extension direction of the cavity 320, and the drying medium can be a fiber desiccant. The battery device 100 also includes an electrical connection assembly 40, which includes a plurality of electrical connectors 410 arranged along the first direction X, each electrical connector 410 is electrically connected to the poles 210 of at least two battery cells 20, and the electrical connection assembly 40, the poles 210 and the end faces of the battery cells 20 form an installation space 50, and the heat exchanger 30 is located in the installation space 50 between the electrical connection assembly 40 and the battery cell 20 in the height direction. The electrical connection assembly 40 forms a transition zone that is distributed at intervals along the first direction X and is located between two adjacent electrical connectors 410, and the projection of the opening 330 in the height direction is located in the transition zone.

[0193] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0194] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0195] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body, forming a receiving cavity for receiving the battery cell; A heat exchange component is arranged in the accommodating cavity. The heat exchange component includes a flow channel and a cavity. The flow channel is used to circulate heat exchange medium. The cavity is used to fill dry medium. The heat exchange component has an opening. The opening connects the cavity and the accommodating cavity.

2. The battery device according to claim 1, characterized in that: The battery device further includes: an electrical connection assembly, which is used to electrically connect to poles of at least two of the battery cells, and the electrical connection assembly and the heat exchange element are located on the same side of the battery cell.

3. The battery device according to claim 1, characterized in that: The flow channel is arranged in parallel with the cavity.

4. The battery device according to claim 3, characterized in that: The cavity is located above the flow channel along the height direction, and the opening is located at the top of the heat exchange element along the height direction.

5. The battery device according to claim 1, characterized in that: The heat exchange element and the battery cell are distributed up and down in the height direction, and the opening is located at the top of the heat exchange element in the height direction.

6. The battery device according to claim 1, characterized in that: The openings include a plurality of openings distributed at intervals along the extending direction of the cavity.

7. The battery device according to claim 1, characterized in that: The drying medium is a fiber desiccant or a hygroscopic foam.

8. The battery device according to any one of claims 2 to 7, characterized in that: The heat exchange element is arranged between the poles of the same battery cell; and / or, The heat exchange element is disposed between adjacent poles of adjacent battery cells along the second direction.

9. The battery device according to claim 2, characterized in that: At least part of the heat exchange element is located between the electrical connection assembly and the battery cell along the height direction.

10. The battery device according to claim 9, characterized in that: The electrical connection assembly, the pole and the end surface of the battery cell form an installation space, and part of the heat exchange component is installed in the installation space.

11. The battery device according to claim 9, characterized in that: The electrical connection assembly includes a plurality of electrical connectors arranged along a first direction, each of the electrical connectors is electrically connected to at least two of the battery cells, and a projection of the opening along a height direction is staggered from a projection of the electrical connector along the height direction.

12. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 11, wherein the battery device is used to store or provide electrical energy.

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