Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer and a heat exchange piece, the box body is provided with an accommodating cavity; the battery monomers are arranged in the accommodating cavity, the number of the battery monomers is multiple, and the battery monomers are distributed in the accommodating cavity in an array mode; the heat exchange part is arranged in the containing cavity and located between the box body and the battery monomers, the heat exchange part comprises a heat exchange main body and a protective layer, the heat exchange main body is provided with a flow channel, a heat exchange medium is arranged in the flow channel, the protective layer is at least located on the side, facing or backing on to the battery monomers, of the heat exchange main body, and the heat exchange medium is arranged in the flow channel. The protective layer comprises an insulating layer and a buffer layer, the insulating layer is attached to the heat exchange body, and the buffer layer is attached to the insulating layer. The insulating layer and the buffer layer of the heat exchange piece form a composite layer, the insulating layer can play a role in insulating protection, and the buffer layer can play a role in buffering during collision, so that the safety of the battery device is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery device and an electrical device. Background Art

[0002] With the development of new energy technologies, batteries are increasingly widely used, such as in mobile phones, laptop computers, battery-powered vehicles, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] When a battery is applied to a vehicle to provide power drive, the safety of the battery becomes an urgent problem to be solved. Summary of the Utility Model

[0004] In view of the above problems, this application provides a battery device and an electrical device, and the battery device is conducive to improving safety.

[0005] In a first aspect, this application provides a battery device, which includes: a box body, battery cells, and a heat exchange member; the box body is provided with a receiving cavity; the battery cells are arranged in the receiving cavity, and there are multiple battery cells, which are arranged in an array in the receiving cavity; the heat exchange member is arranged in the receiving cavity and is located between the box body and the battery cells. The heat exchange member includes a heat exchange main body and a protective layer. The heat exchange main body is provided with a flow channel, and a heat exchange medium is arranged in the flow channel. The protective layer is at least located on one side of the heat exchange main body facing or facing away from the battery cells. The protective layer includes an insulating layer and a buffer layer. The insulating layer is attached to the heat exchange main body, and the buffer layer is attached to the insulating layer.

[0006] In the technical solution of the embodiment of this application, the heat exchange member is located between the box body and the battery cells. While providing heat exchange for the battery cells, it can also reduce the influence of external forces on the battery cells and improve safety. The insulating layer and the buffer layer of the heat exchange member form a composite layer. The insulating layer can play an insulating and protective role, preventing the heat exchange member from conducting with the internal conductive structure of the battery device and reducing the safety risk of the battery device. The buffer layer can play a buffering role during collisions, reducing the deformation amount caused by the impact of the heat exchange member and improving the safety of the battery device.

[0007] In some embodiments, the insulating layer covers the outer surfaces of the heat exchange main body facing and facing away from the battery cells, and the buffer layer covers the outer surfaces of the insulating layer facing and facing away from the battery cells. The thickness of the insulating layer is less than the thickness of the buffer layer. In this way, the protective layer can provide protection on both sides of the heat exchange main body facing and facing away from the battery cells, improving the insulation performance and structural strength of the heat exchange member, and thus improving safety.

[0008] In some embodiments, the thickness of the insulating layer ranges from 0.05 mm to 2 mm, and the thickness of the buffer layer ranges from 1 mm to 10 mm. In this way, the insulating performance, anti-collision ability of the protective layer and the weight of the heat exchanger can be taken into account, improving safety while reducing the impact on the energy density of the battery device.

[0009] In some embodiments, the heat exchange body includes a first heat conducting plate and a second heat conducting plate that are hermetically fitted. The first heat conducting plate is connected to the battery cell, and a warping portion that warps away from the battery cell is provided on the second heat conducting plate. A flow channel is formed between the warping portion and the first heat conducting plate. In this way, the warping portion can improve the structural strength of the second heat conducting plate and increase the surface area of the heat exchanger.

[0010] In some embodiments, the heat exchanger is located between the bottom plate of the box body and the battery cell. The battery cell is provided with electrode terminals and a pressure relief mechanism on the side facing the heat exchanger. The pressure relief mechanism is located between the two electrode terminals, and the electrode terminals of adjacent battery cells are connected by a bus bar in a first direction. In this way, when the battery cell relieves pressure, it sprays towards the bottom plate of the box body, which can improve the safety of the battery device; the heat exchanger is attached to the side of the battery cell where the electrode terminals are provided, which can improve the heat exchange efficiency and the heat exchange effect.

[0011] In some embodiments, the heat exchanger is provided with a plurality of heat exchange areas, and adjacent heat exchange areas are spaced apart in a second direction. The bus bar is located between adjacent heat exchange areas, and the first direction intersects with the second direction. In this way, the heat exchanger can avoid the bus bar, reducing the influence of the strong current on the bus bar on the heat exchanger, thereby improving the safety of the battery device.

[0012] In some embodiments, the bus bar and the heat exchange area are spaced apart in the second direction, and the spacing is not less than 5 mm. In this way, the bus bar and the heat exchanger can be kept at a safe distance, reducing the hidden danger of conduction between the bus bar and the heat exchanger.

[0013] In some embodiments, there are a plurality of heat exchangers, and all of them extend in the first direction. Each heat exchanger forms a heat exchange area. In this way, the impact on the entire battery device after a single heat exchanger is damaged can be reduced, improving the safety of the battery device, and the material waste caused by slotting can also be reduced.

[0014] In some embodiments, in the second direction, the heat exchange member is located between two electrode terminals of the same battery cell. A plurality of relief openings are provided on the heat exchange member, and the relief openings are correspondingly arranged with the pressure relief mechanism. In this way, while providing heat exchange, the heat exchange member does not affect the pressure relief function of the battery cell, and can also provide a certain supporting force for the battery cell, improving the connection strength between battery cells in the first direction.

[0015] In some embodiments, the flow channel includes an inlet section, a heat exchange section, and an outlet section connected in sequence. The inlet section and the outlet section are located at the same end of the heat exchange member in the first direction, and the inlet section and the outlet section extend away from each other in the second direction. In this way, pipelines connected to the flow channel can be arranged at the same end of the heat exchange member, facilitating the spatial layout of the pipelines.

[0016] In some embodiments, the heat exchange section includes a first flow splitting section, a transition section, and a second flow splitting section connected in sequence. The first flow splitting section and the second flow splitting section are arranged in parallel and both extend in the first direction. The transition section is located at one end of the heat exchange member away from the inlet section. The relief openings are located between the first flow splitting section and the second flow splitting section. A plurality of parallel sub-flow channels are provided in the second direction on the first flow splitting section and / or the second flow splitting section. In this way, the contact area between the heat exchange member and the battery cell can be increased in the second direction, enhancing the heat exchange effect, and reducing the interference of the heat exchange medium in the flow channel on the pressure relief mechanism, improving the reliability of the pressure relief mechanism.

[0017] In some embodiments, in the second direction, the heat exchange member is located between adjacent electrode terminals of adjacent battery cells. In this way, the heat exchange member can not only provide heat exchange for the battery cell, eliminating the need for hole opening operations to avoid the pressure relief mechanism, but also improve the connection strength between battery cells in both the first direction and the second direction.

[0018] In some embodiments, the flow channel includes a first heat exchange section, a connection section, and a second heat exchange section connected in sequence. The first heat exchange section and the second heat exchange section both extend in the first direction and are connected to the connection section at the same end. An inlet is provided at the other end of the first heat exchange section, and an outlet is provided at the other end of the second heat exchange section. The inlet and the outlet are spaced apart in the first direction. In this way, the path of the flow channel can be extended, improving the heat exchange effect, and the inlet and the outlet can be staggered in the first direction, facilitating the arrangement of pipelines connected to the flow channel.

[0019] In some embodiments, the heat exchanger further includes an auxiliary heat exchanger, which is located between the side plate of the box body and the adjacent busbar in the second direction, and an auxiliary protective layer is provided on the surface of the auxiliary heat exchanger. In this way, the auxiliary heat exchanger can exchange heat for the battery cells at the edge of the battery device in the second direction, and the auxiliary protective layer can improve the structural strength of the auxiliary heat exchanger, thereby improving the safety of the battery device.

[0020] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiments, and the battery device is used to provide electrical energy.

[0021] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0023] Figure 1 is a schematic diagram of a vehicle according to some embodiments of the present application;

[0024] Figure 2 is a disassembled schematic diagram of a battery device according to some embodiments of the present application;

[0025] Figure 3 is a schematic diagram of the structure of a battery cell according to some embodiments of the present application;

[0026] Figure 4 is a schematic diagram of the connection between a heat exchanger and a battery cell according to some embodiments of the present application Figure 1 ;

[0027] Figure 5 is a schematic diagram of the structure of a heat exchanger from a certain perspective according to some embodiments of the present application;

[0028] Figure 6 is for the present application Figure 5 is a disassembled schematic diagram of the heat exchanger in;

[0029] Figure 7 is for the present application Figure 4 is a partial enlarged view at I;

[0030] Figure 8 is a schematic diagram of the structure of a flow channel according to some embodiments of the present applicationFigure 1 ;

[0031] Figure 9 Schematic connection diagram of the heat exchanger and the battery cell in some embodiments of the present application Figure 2 ;

[0032] Figure 10 Schematic structure diagram of the flow channel in some embodiments of the present application Figure 2 ;

[0033] Figure 11 Schematic structure diagram of the auxiliary heat exchanger in some embodiments of the present application

[0034] The reference numerals in the specific embodiments are as follows:

[0035] 1000 - Vehicle; 100 - Battery device; 200 - Controller; 300 - Motor;

[0036] 1 - Heat exchanger; 11 - Heat exchange main body; 111 - First heat conduction plate; 112 - Second heat conduction plate; 12 - Protective layer; 121 - Insulating layer; 122 - Buffer layer; 13 - Flow channel; 131 - Inlet section; 132 - Heat exchange section; 1321 - First shunt section; 1322 - Transition section; 1323 - Second shunt section; 133 - Outlet section; 134 - First heat exchange section; 135 - Connection section; 136 - Second heat exchange section; 14 - Avoidance opening; 15 - Auxiliary heat exchanger; 2 - Battery cell; 21 - Electrode terminal; 22 - Pressure relief mechanism; 3 - Box body; 31 - Protective plate; 32 - Bottom plate; 4 - Bus bar.

[0037] X - First direction; Y - Second direction. Specific embodiments

[0038] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill 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" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non - exclusive inclusion.

[0040] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically and clearly defined.

[0041] Reference to "embodiment" in this text means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is merely 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 simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0043] In the description of the embodiments of the present application, the term "a plurality of" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and defined, technical terms such as "installation", "connection", "coupling", "fixing", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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 specific circumstances.

[0046] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0047] When a power battery is applied to an electric transportation tool (such as an electric vehicle), it is usually arranged at the bottom of the transportation tool. The power battery includes a water-cooled plate and a plurality of battery cells. The water-cooled plate is connected to the battery cells, and when the battery cells generate heat, it conducts out the heat of the battery cells, playing a role in heat dissipation and realizing the thermal management of the battery cells. During the use of the electric transportation tool, the power battery is easily damaged under external forces, affecting the thermal management effect of the power battery and posing a safety hazard to the power battery.

[0048] In order to improve the safety of the power battery, the water-cooled plate can be strengthened to improve the structural strength of the water-cooled plate, making the water-cooled plate itself not easily deformed or leaking liquid, and being able to provide protection for the battery cells, thereby improving the ability of the power battery to cope with external forces.

[0049] Based on the above considerations, the present application provides a battery device, which includes a box body, battery monomers, and a heat exchange member. A plurality of battery monomers are arranged in the box body, and the heat exchange member is arranged between the plurality of battery monomers and the box body. Among them, a protective layer is arranged on the surface of the heat exchange member, and the protective layer includes an insulating layer and a buffer layer.

[0050] In such a battery device, the insulating layer can play an insulating and protective role, thereby preventing the heat exchange member from conducting with the internal conductive structure of the battery device and reducing the safety risk of the battery device. The buffer layer can deform during a collision, playing a buffering role, thereby absorbing the impact during the collision, reducing the deformation amount of the heat exchange member caused by the impact, and improving the safety of the battery device.

[0051] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in electrical devices such as vehicles, ships, or aircraft. The power system of the electrical device can be composed of the battery device disclosed in the present application. In this way, it helps to improve the safety of the electrical device.

[0052] The embodiments of the present application provide an electrical device using the battery device as a power source. The electrical device can be but is not limited to electric toys, battery cars, electric vehicles, ships, etc. Among them, electric toys can include electric vehicle toys, electric ship toys, electric aircraft toys, etc.

[0053] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical device in an embodiment of the present application for illustration.

[0054] Please refer toFigure 1 , Figure 1 is a simplified schematic diagram of a vehicle according to some embodiments of the present application.

[0055] The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be disposed in the middle, head or tail of the vehicle 1000 floor. The battery device 100 can be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000. The battery device 100 can also be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0056] In the battery device 100, a plurality of battery cells are provided. The plurality of battery cells can be connected in series, in parallel or in a hybrid connection. The hybrid connection means that there are both series and parallel connections among the plurality of battery cells. Exemplarily, the plurality of battery cells can be directly connected in series, in parallel or in a hybrid connection together, and then the whole formed by the plurality of battery cells is accommodated in the box body of the battery device 100. Wherein, each battery cell can be a secondary battery, and the battery cell is the smallest unit that makes up the battery device 100. The battery cell includes a housing, electrode terminals, an electrode assembly and other functional components.

[0057] The housing is a component that forms the internal environment of the battery cell. Among them, the formed internal environment can be used to accommodate the electrode assembly, electrolyte and other components. The material of the housing can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The embodiments of the present application do not make special restrictions on this.

[0058] The electrode assembly is a component in the battery cell where an electrochemical reaction occurs. The electrode assembly is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and usually an isolating member is provided between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate having active substances constitute the electrode body of the electrode assembly, and the parts of the positive electrode plate and the negative electrode plate not having active substances respectively constitute the positive electrode tab and the negative electrode tab. During the charge and discharge process of the battery device 100, the positive active substance and the negative active substance react with the electrolyte, and the positive electrode tab and the negative electrode tab are connected to the electrode terminals to form a current loop.

[0059] Please refer to Figures 2 to 6 , Figure 2 is a disassembled schematic diagram of a battery device according to some embodiments of the present application; Figure 3 is a structural schematic diagram of a battery cell according to some embodiments of the present application; Figure 4Schematic diagram of the connection between the heat exchange component and the battery cell according to some embodiments of the present application Figure 1 ; Figure 5 Schematic structural diagram of the heat exchange component according to some embodiments of the present application from one perspective; Figure 6 For the present application Figure 5 Exploded view of the heat exchange component in

[0060] According to some embodiments of the present application, the present application provides a battery device, which includes a box body 3, battery cells 2 and a heat exchange component 1; the box body 3 is provided with a receiving cavity; the battery cells 2 are arranged in the receiving cavity, and there are multiple battery cells 2, which are arranged in an array in the receiving cavity; the heat exchange component 1 is arranged in the receiving cavity, between the box body 3 and the battery cells 2, the heat exchange component 1 includes a heat exchange main body 11 and a protective layer 12, the heat exchange main body 11 is provided with a flow channel 13, and a heat exchange medium is arranged in the flow channel 13, and the protective layer 12 is at least located on one side of the heat exchange main body 11 facing or facing away from the battery cells 2, and the protective layer 12 includes an insulating layer 121 and a buffer layer 122, the insulating layer 121 is attached to the heat exchange main body 11, and the buffer layer 122 is attached to the insulating layer 121.

[0061] When multiple battery cells 2 are arranged in an array in the receiving cavity, they can be arranged in a rectangular array or a circular array. When arranging the heat exchange component 1 in the receiving cavity, the heat exchange component 1 can be bonded to the battery cells 2 through structural adhesive, and the connection between the heat exchange component 1 and the box body 3 can also be realized through fasteners at the same time. The heat exchange component 1 realizes the cooling and heat exchange of the battery cells 2 through the heat exchange medium flowing in the flow channel 13, and the heat exchange medium can be a gaseous heat exchange medium or a liquid heat exchange medium.

[0062] Exemplarily, the heat exchange component 1 can be arranged between the top plate of the box body 3 and the battery cells 2. When the heat exchange component 1 is arranged between the top plate of the box body 3 and the battery cells 2, heat exchange can be realized above the battery cells 2, and protection can also be provided above the battery cells 2 to reduce the impact of external impacts (such as personnel trampling) on the battery cells 2.

[0063] Exemplarily, the heat exchange component 1 can also be arranged between the bottom plate 32 of the box body 3 and the battery cells 2, which can not only realize heat exchange below the battery cells 2, but also provide protection below the battery cells 2, especially reducing the impact of the bottom ball condition (the condition where the bottom of the battery device is impacted by a spherical object, such as a stone or a speed bump protrusion) on the battery cells 2 and improving safety.

[0064] The insulating layer 121 is a layer formed by an insulating material covering the surface of the heat exchange main body 11. Exemplarily, the insulating material can be hot-pressed on the surface of the heat exchange main body 11, can be sprayed on the surface of the heat exchange main body 11, can be brushed on the surface of the heat exchange main body 11, etc.; the insulating material can also be an insulating material board, and the insulating material board is attached to the heat exchange main body 11. The buffer layer 122 is a layer formed by a buffer material covering the insulating layer 121 and is combined with the insulating layer 121. Exemplarily, the buffer material can be materials such as rubber, plastic, thermoplastic elastomer, etc.

[0065] The protective layer 12 can be located on the side of the heat exchange main body 11 facing the battery cell 2 and cover the outer surface of this side of the heat exchange main body 11; the protective layer 12 can be located on the side of the heat exchange main body 11 facing away from the battery cell 2 and cover the outer surface of this side of the heat exchange main body 11; the protective layer 12 can also be located on both the side of the heat exchange main body 11 facing away from and facing the battery cell 2 at the same time, covering the outer surfaces of both sides of the heat exchange main body 11 at the same time. When the protective layer 12 covers the outer surface of one or both sides of the heat exchange main body 11, it can cover a part of the outer surface or completely cover the outer surface.

[0066] In the technical solution of the embodiment of the present application, the battery device includes a box body 3, a battery cell 2 and a heat exchange member 1. The heat exchange member 1 is located between the box body 3 and the battery cell 2, provides heat exchange for the battery cell 2 and can provide protection at the same time, reducing the influence of external forces on the battery cell 2 and improving safety. The heat exchange member 1 includes a heat exchange main body 11 and a protective layer 12. The protective layer 12 includes an insulating layer 121 and a buffer layer 122. The insulating layer 121 and the buffer layer 122 form a composite layer. The insulating layer 121 can play an insulating and protective role, preventing the heat exchange member 1 from being electrically connected to the internal conductive structure of the battery device, thereby reducing the safety risk of the battery device. The buffer layer 122 can play a buffering role during a collision, absorbing the impact during the collision, thereby reducing the deformation amount of the heat exchange member 1 caused by the impact and improving the safety of the battery device.

[0067] As Figure 6 shown, according to some embodiments of the present application, optionally, the insulating layer 121 is coated on the outer surfaces of the heat exchange main body 11 facing and facing away from the battery cell 2, the buffer layer 122 is coated on the outer surfaces of the insulating layer 121 facing and facing away from the battery cell 2, and the thickness of the insulating layer 121 is less than the thickness of the buffer layer 122.

[0068] On both sides of the heat exchange main body 11 facing and facing away from the battery cell 2, the insulating layer 121 completely covers the outer surface of the heat exchange main body 11, and the buffer layer 122 completely covers the outer surface of the insulating layer 121. When the insulating layer 121 covers the outer surface of the heat exchange main body 11, it can cover the outer surface of the heat exchange main body 11 with an equal thickness, or different thicknesses can be set in different areas of the outer surface of the heat exchange main body 11. The buffer layer 122 can cover the outer surface of the insulating layer 121 with an equal thickness, or different thicknesses can be set in different areas of the outer surface of the insulating layer 121.

[0069] In the technical solution of the embodiment of the present application, the protective layer 12 can provide protection on the two side surfaces of the heat exchange main body 11 facing and facing away from the battery cell 2, which can improve the insulation performance and structural strength of the heat exchange member 1, thereby improving safety. The buffer layer 122 is coated on the outer surface of the insulating layer 121, and can reduce the damage caused to the insulating layer 121 by bumps while providing protection for the heat exchange main body 11. The buffer layer 122 has a large thickness and the insulating layer 121 has a small thickness, which can provide a deformation space for the buffer layer 122, thereby improving the structural strength of the heat exchange member 1 and enhancing the anti-collision ability.

[0070] As Figure 6 shown, according to some embodiments of the present application, optionally, the thickness range of the insulating layer 121 is 0.05 mm to 2 mm, and the thickness range of the buffer layer 122 is 1 mm to 10 mm.

[0071] The material of the insulating layer 121 can be epoxy resin, which is sprayed on the surface of the heat exchange main body 11. When spraying on the surface of the heat exchange main body 11, the thickness of the insulating layer 121 is the same everywhere on the surface of the heat exchange main body 11 (ignoring the thickness error during spraying). Exemplarily, the thickness of the insulating layer 121 can be any value among 0.05 mm, 0.25 mm, 0.45 mm, 0.65 mm, 0.85 mm, 1.05 mm, 1.25 mm, 1.45 mm, 1.65 mm, 1.85 mm, 2 mm, or any intermediate value between any two adjacent values described above.

[0072] The material of the buffer layer 122 can be polyvinyl chloride or polyurea. It is preferably to select polyurea material for the buffer layer 122, and it is sprayed on the surface of the insulating layer 121 after the insulating layer 121 is cured. When spraying the buffer layer 122, the thickness of the buffer layer 122 can be the same or different everywhere. Exemplarily, the thickness of the buffer layer 122 can be any value among 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, or any intermediate value between any two adjacent values described above.

[0073] In the technical solution of the embodiment of the present application, the thickness of the insulating layer 121 is limited to 0.05 mm to 2 mm, and the thickness of the buffer layer 122 is limited to 1 mm to 10 mm, which can take into account the insulation performance, anti-knock ability of the protective layer 12 and the weight of the heat exchanger 1, improving safety while reducing the impact on the energy density of the battery device.

[0074] As Figure 5 and Figure 6 shown, according to some embodiments of the present application, optionally, the heat exchange body 11 includes a first heat conduction plate 111 and a second heat conduction plate 112 that are hermetically fitted. The first heat conduction plate 111 is connected to the battery cell 2, and the second heat conduction plate 112 is provided with a warping portion that warps away from the battery cell 2. A flow channel 13 is formed between the warping portion and the first heat conduction plate 111.

[0075] The first heat conduction plate 111 is connected to the battery cell 2 through structural adhesive. The second heat conduction plate 112 can be connected to the first heat conduction plate 111 by bonding, welding, etc., to form a closed environment for the flow channel 13 and reduce the risk of heat exchange medium overflow.

[0076] The first heat conduction plate 111 is integrally formed, and the second heat conduction plate 112 is integrally formed. Among them, the first heat conduction plate 111 is a flat plate with the same thickness everywhere; the second heat conduction plate 112 is also a flat plate with the same thickness everywhere. After stamping, a warping portion protruding on one side surface is formed. The area of the second heat conduction plate 112 corresponding to the warping portion on the other side forms a groove, and the groove is sealed by the first heat conduction plate 111 to form the flow channel 13.

[0077] In the technical solution of the embodiment of the present application, the warping portion warps on the second heat conduction plate 112, which can play a role similar to that of a reinforcing rib, making the second heat conduction plate 112 not easily bent or deformed and improving the structural strength of the second heat conduction plate 112. Moreover, by setting the warping portion, the heat dissipation area of the heat exchanger 1 can also be increased. In addition, the warping portion is located on the side of the second heat conduction plate 112 facing away from the battery cell 2, without affecting the fitting of the heat exchanger 1 and the battery cell 2.

[0078] As Figure 3 shown, according to some embodiments of the present application, optionally, the heat exchanger 1 is located between the bottom plate 32 of the box body 3 and the battery cell 2. The battery cell 2 is provided with an electrode terminal 21 and a pressure relief mechanism 22 on the side facing the heat exchanger 1. The pressure relief mechanism 22 is located between the two electrode terminals 21. The electrode terminals 21 of adjacent battery cells 2 are connected by a bus bar 4 in the first direction X.

[0079] The battery cell 2 is a square - shell battery and is inverted in the accommodation cavity. A plurality of battery cells 2 are distributed in a rectangular array in the accommodation cavity, and a plurality of battery cells 2 achieve the collection and transfer of current through the bus bar 4. Two electrode terminals 21 are provided on the same side of the battery cell 2, and a pressure - relief mechanism 22 is provided between the two electrode terminals 21. The pressure - relief mechanism 22 is used to discharge the internal gas of the battery cell 2. Exemplarily, when the internal pressure or temperature of the battery cell 2 reaches a predetermined threshold, the pressure - relief mechanism 22 performs an action or its weak structure is damaged, forming an opening or channel for the release of the internal pressure or temperature.

[0080] In the technical solution of the embodiment of the present application, the heat - exchange member 1 is located between the bottom plate 32 of the box body 3 and the battery cell 2, which can improve the ability of the battery device to cope with the bottom - ball working condition. The electrode terminal 21 of the battery cell 2 and the pressure - relief mechanism 22 face the heat - exchange member 1 and spray towards the bottom plate 32 of the box body 3 during pressure relief, which can improve the safety of the battery device and reduce the safety risk of the vehicle occupants when the battery device is installed at the bottom of the vehicle. In addition, the area near the electrode terminal 21 is the area where the battery cell 2 generates more heat. By attaching the heat - exchange member 1 to this side of the battery cell 2, the heat - exchange efficiency can be improved and the heat - exchange effect can be improved.

[0081] Please refer to Figure 7 and Figure 8 , Figure 7 is the Figure 4 partial enlarged view at I of the present application; Figure 8 is the structural schematic Figure 1 of the flow channel of some embodiments of the present application.

[0082] According to some embodiments of the present application, optionally, the heat - exchange member 1 is provided with a plurality of heat - exchange areas, and adjacent heat - exchange areas are spaced apart in the second direction Y. The bus bar 4 is located between adjacent heat - exchange areas, and the first direction X intersects with the second direction Y.

[0083] The heat - exchange member 1 can have various forms. Exemplarily, first, the number of the heat - exchange members 1 can be one, and a plurality of grooves are formed on the heat - exchange member 1. The two sides of the grooves are heat - exchange areas, and the grooves are avoidance areas for avoiding the bus bar 4, so that the bus bar 4 does not contact the heat - exchange member 1. Second, the number of the heat - exchange members 1 can be multiple, and adjacent heat - exchange members 1 are spaced apart. Each heat - exchange member 1 occupies one heat - exchange area, and the bus bar 4 is located between two adjacent heat - exchange members 1.

[0084] In the technical solution of the embodiment of the present application, the plurality of heat - exchange areas are spaced apart, which can enable the heat - exchange member 1 to avoid the bus bar 4 and not contact the bus bar 4, reducing the influence of the strong current on the bus bar 4 on the heat - exchange member 1, thereby improving the safety of the battery device.

[0085] Such as Figure 7As shown, according to some embodiments of the present application, optionally, the bus bar 4 and the heat exchange area are spaced apart in the second direction Y, and the spacing (L) is not less than 5 mm.

[0086] The bus bar 4 and the heat exchange area have a spacing in the second direction Y. Exemplarily, the spacing can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0087] In the technical solution of the embodiments of the present application, the spacing between the bus bar 4 and the heat exchange area in the second direction Y is not less than 5 mm. Even in the case of assembly errors, the bus bar 4 and the heat exchange member 1 can be spaced apart, enabling the bus bar 4 and the heat exchange member 1 to maintain a safe distance and reducing the potential hazard of conduction between the bus bar 4 and the heat exchange member 1.

[0088] As Figure 4 As shown, according to some embodiments of the present application, optionally, there are multiple heat exchange members 1, and they all extend in the first direction X. Each heat exchange member 1 forms a heat exchange area.

[0089] The multiple heat exchange members 1 are independently installed in the accommodation cavity, and the adjacent heat exchange members 1 are spaced apart. The heat exchange member 1 is rectangular, and the lengths of the heat exchange members 1 are the same, and the widths can be the same or different.

[0090] In the technical solution of the embodiments of the present application, the multiple heat exchange members 1 are independent of each other and do not affect each other, which can reduce the impact on the entire battery device after a single heat exchange member 1 is damaged, thereby improving the safety of the battery device. In addition, since there are multiple heat exchange members 1 and the adjacent heat exchange members 1 are spaced apart, compared with having only one heat exchange member 1, it can reduce the material waste caused by slotting.

[0091] As Figure 8 As shown, according to some embodiments of the present application, optionally, in the second direction Y, the heat exchange member 1 is located between the two electrode terminals 21 of the same battery cell 2, and the heat exchange member 1 is provided with a plurality of avoidance openings 14, and the avoidance openings 14 are correspondingly arranged with the pressure relief mechanism 22.

[0092] When the battery cell 2 is a square shell battery, the electrode terminals 21 are located on the side surface enclosed by the length side and the thickness side of the battery cell 2. On this side surface, the distance between the two electrode terminals 21 can be flexibly designed. Exemplarily, when the length of the battery cell 2 is longer, the distance between the two electrode terminals 21 is larger, and the heat exchange member 1 is attached between the two electrode terminals 21 of the battery cell 2.

[0093] One avoidance opening 14 can correspond to multiple pressure relief mechanisms 22, and one avoidance opening 14 can also correspond to one pressure relief mechanism 22. Exemplarily, the heat exchange member 1 is provided with a plurality of avoidance openings 14, and the avoidance openings 14 are in one-to-one correspondence with the pressure relief mechanism 22.

[0094] In the technical solution of the embodiment of the present application, the heat exchanger 1 is located between the two electrode terminals 21 of the same battery cell 2, and can provide heat exchange for the battery cell 2 in the middle of the side of the battery cell 2 where the electrode terminal 21 is set. In addition, the heat exchanger 1 is provided with a avoidance port 14 corresponding to the pressure relief mechanism 22, so that the heat exchanger 1 does not affect the pressure relief function of the battery cell 2 while providing heat exchange. In addition, the heat exchanger 1 extends in the first direction X, and can also provide a certain support force for the battery cell 2, thereby improving the connection strength between the battery cells 2 in the first direction X.

[0095] like Figure 8 As shown, according to some embodiments of the present application, optionally, the flow channel 13 includes an inlet section 131, a heat exchange section 132 and an outlet section 133 connected in sequence, the inlet section 131 and the outlet section 133 are located at the same end of the heat exchange element 1 in the first direction X, and the inlet section 131 and the outlet section 133 extend in opposite directions in the second direction Y.

[0096] The inlet section 131 is provided with an inlet for the heat exchange medium to enter, and the outlet section 133 is provided with an outlet for the heat exchange medium to discharge. The inlet is located at one end of the inlet section 131 away from the heat exchange section 132, and the outlet is located at one end of the outlet section 133 away from the heat exchange section 132. Along the direction away from the heat exchange section 132, the distance between the inlet section 131 and the outlet section 133 gradually increases.

[0097] When the heat exchange element 1 exchanges heat (cools or heats) the heat exchange battery cell 2, the heat exchange medium enters the inlet section 131 from the external pipe connected to the flow channel 13, flows through the heat exchange section 132, and is discharged from the outlet section 133. Exemplarily, the heat exchange medium can be water, which can cool or heat the battery cell 2, thereby providing heat exchange for the battery cell 2.

[0098] In the technical solution of the embodiment of the present application, the inlet section 131 and the outlet section 133 are located at the same end of the heat exchanger 1 in the first direction X, so that the pipeline connected to the flow channel 13 can be arranged at the same end of the heat exchanger 1, reducing the length of the pipeline arrangement. The inlet section 131 and the outlet section 133 extend in opposite directions in the second direction Y, and the distance between the inlet section 131 and the outlet section 133 can be increased in the second direction Y, which is convenient for spatial layout of the pipeline.

[0099] like Figure 8As shown, according to some embodiments of the present application, optionally, the heat exchange section 132 includes a connected first shunt section 1321, a transition section 1322, and a second shunt section 1323. The first shunt section 1321 and the second shunt section 1323 are arranged in parallel and both extend in the first direction X. The transition section 1322 is located at one end of the heat exchange member 1 away from the inlet section 131. The avoidance opening 14 is located between the first shunt section 1321 and the second shunt section 1323. The first shunt section 1321 and / or the second shunt section 1323 are provided with a plurality of parallel sub-channels 13 in the second direction Y.

[0100] The number of sub-channels on the first shunt section 1321 and the number of sub-channels on the second shunt section 1323 may be the same or different. Exemplarily, a plurality of parallel sub-channels are provided on the first shunt section 1321, and a plurality of parallel sub-channels are also provided on the second shunt section 1323. The number of sub-channels on the first shunt section 1321 is the same as the number of sub-channels on the second shunt section 1323.

[0101] When the heat exchange medium flows from the inlet section 131 into the heat exchange section 132 in the flow channel 13, it is divided into multiple branches, and each sub-channel corresponds to one branch. After flowing through the first shunt section 1321, it converges in the transition section 1322. When entering the second shunt section 1323, it is divided into multiple branches again, and when entering the outlet section 133, the multiple branches converge.

[0102] In the technical solution of the embodiments of the present application, by providing the first shunt section 1321 and the second shunt section 1323 in the heat exchange section 132, the contact area with the battery cell 2 can be increased in the second direction Y, strengthening the heat exchange effect. The transition section 1322 connects the first shunt section 1321 and the second shunt section 1323, which can play a role in connection and convergence and extend the length of the flow channel 13. The avoidance opening 14 is located between the first shunt section 1321 and the second shunt section 1323, which can enable the first shunt section 1321 and the second shunt section 1323 to avoid the pressure relief mechanism 22, reducing the interference of the heat exchange medium in the flow channel 13 on the pressure relief mechanism 22 and improving the reliability of the pressure relief mechanism 22.

[0103] Please refer to Figures 9 to 11 , Figure 9 which is a schematic connection diagram of the heat exchange member and the battery cell according to some embodiments of the present application Figure 2 ; Figure 10 which is a schematic structural diagram of the flow channel according to some embodiments of the present application Figure 2 ; Figure 11 which is a schematic structural diagram of the auxiliary heat exchange member according to some embodiments of the present application.

[0104] According to some embodiments of the present application, optionally, in the second direction Y, the heat exchange member 1 is located between adjacent electrode terminals 21 of adjacent battery cells 2.

[0105] The battery cell 2 is a square-shell battery. Exemplarily, in the length direction of the battery cell 2, the distance between the two electrode terminals 21 is close, and the distance between the electrode terminal 21 and the end of the battery cell 2 in the length direction is far. In the second direction Y, the distance between the adjacent two electrode terminals 21 of the adjacent two battery cells 2 is large. On this basis, the heat exchange member 1 connects the adjacent two battery cells 2 in the second direction Y.

[0106] In the technical solution of the embodiment of the present application, the heat exchange member 1 is located between the adjacent electrode terminals 21 of the adjacent two battery cells 2 in the second direction Y, which can not only provide heat exchange for the battery cell 2 and eliminate the need for opening operations to avoid the pressure relief mechanism 22, but also improve the connection strength between the battery cells 2 in both the first direction X and the second direction Y at the same time.

[0107] As Figure 10 shown, according to some embodiments of the present application, optionally, the flow channel 13 includes a first heat exchange section 134, a connection section 135, and a second heat exchange section 136 that are connected in sequence. The first heat exchange section 134 and the second heat exchange section 136 both extend in the first direction X, and the same ends are connected to the connection section 135. The other end of the first heat exchange section 134 is provided with an inlet, and the other end of the second heat exchange section 136 is provided with an outlet. The inlet and the outlet are spaced apart in the first direction X.

[0108] The first heat exchange section 134 is provided with an inlet at the end facing away from the connection section 135, and the second heat exchange section 136 is provided with an outlet at the end facing away from the connection section 135. Along the second direction Y, the projection of the inlet does not overlap with the projection of the outlet.

[0109] Exemplarily, the first heat exchange section 134, the connection section 135, and the second heat exchange section 136 are all provided with a plurality of sub-flow channels 13. When the heat exchange member 1 provides heat exchange for the battery cell 2, the heat exchange medium enters the first heat exchange section 134 from the inlet, is split in the first heat exchange section 134, flows to the connection section 135, enters the second heat exchange section 136 from the connection section 135, and flows to the outlet in the second heat exchange section 136 to converge and flow out.

[0110] In the technical solution of the embodiment of the present application, the first heat exchange section 134 and the second heat exchange section 136 both extend in the first direction X, and the same ends are connected to the connection section 135, which can extend the path of the flow channel 13, thereby increasing the contact area with the battery cell 2 and improving the heat exchange effect. The inlet and the outlet are spaced apart in the first direction X, which can stagger the inlet and the outlet in the first direction X, facilitating the arrangement of the pipeline connected to the flow channel 13.

[0111] As Figure 11As shown, according to some embodiments of the present application, optionally, the heat exchange member 1 further includes an auxiliary heat exchange member 15. The auxiliary heat exchange member 15 is located between the side plate of the box body 3 and the adjacent busbar member 4 in the second direction Y, and an auxiliary protective layer is provided on the surface of the auxiliary heat exchange member 15.

[0112] Exemplarily, the auxiliary protective layer includes an auxiliary insulating layer and an auxiliary buffer layer. The auxiliary insulating layer and the auxiliary buffer layer are sequentially coated on the outer surface of the auxiliary heat exchange member 15. The material of the auxiliary insulating layer is the same as that of the insulating layer 121, and the material of the auxiliary buffer layer is the same as that of the buffer layer 122.

[0113] In the technical solution of the embodiment of the present application, the auxiliary heat exchange member 15 is located between the side plate of the box body 3 and the busbar member 4 adjacent to the side plate in the second direction Y, and can provide heat exchange for the battery cell 2 at the edge of the battery device in the second direction Y. An auxiliary protective layer is provided on the outer surface of the auxiliary heat exchange member 15, which can improve the structural strength of the auxiliary heat exchange member 15, thereby improving the safety of the battery device.

[0114] According to some embodiments of the present application, the present application further provides an electrical device, including the battery device 100 of any of the above solutions, and the battery device 100 is used to provide electrical energy for the electrical device.

[0115] The electrical device may be any of the foregoing devices or systems that apply the battery device 100.

[0116] Such as Figures 1 to 11As shown, according to some embodiments of the present application, the present application provides a battery device 100, which includes a box body 3, battery cells 2 and a heat exchange member 1. A plurality of battery cells 2 are distributed in a rectangular array in the accommodation cavity of the box body 3, and the electrode terminals 21 and the pressure relief mechanism 22 of the battery cells 2 face the bottom plate 32 of the box body 3. The heat exchange member 1 is disposed in the accommodation cavity, between the bottom plate 32 of the box body 3 and the battery cells 2. A protective plate 31 may be provided between the heat exchange member 1 and the bottom plate 32 to reduce the influence of the bottom ball condition on the battery cells 2. The heat exchange member 1 is plural and is spaced in the second direction Y, avoiding the electrode terminals 21. The interval between the heat exchange member 1 and the bus bar 4 connecting the battery cells 2 in the second direction Y is not less than 5 mm. The heat exchange member 1 includes a heat exchange main body 11 and a protective layer 12. The heat exchange main body 11 is provided with a flow channel 13, and the heat exchange medium in the flow channel 13 may be water. The protective layer 12 includes an insulating layer 121 and a buffer layer 122. The insulating layer 121 is coated on the outer surfaces of the heat exchange main body 11 facing and facing away from the battery cells 2, and the buffer layer 122 is coated on the outer surfaces of the insulating layer 121 facing and facing away from the battery cells 2. The insulating layer 121 is an epoxy resin coating, and the buffer layer 122 is a polyurea coating. In the battery device, the heat exchange member 1 can not only provide heat exchange on the side where the electrode terminals 21 of the battery cells 2 are located, but also provide protection under the battery cells 2. The insulating layer 121 and the buffer layer 122 of the heat exchange member 1 form a composite layer, which can improve the insulation performance and impact resistance of the heat exchange member 1, reduce the influence of the bottom ball condition on the battery cells 2, and thus improve the safety of the battery cells 2.

[0117] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body is provided with a containing cavity; A battery cell is disposed in the accommodating cavity, wherein the battery cell is in a plurality and is distributed in an array in the accommodating cavity; The heat exchange component is arranged in the accommodating cavity and is located between the box body and the battery cell. The heat exchange component includes a heat exchange body and a protective layer. The heat exchange body is provided with a flow channel, and a heat exchange medium is provided in the flow channel. The protective layer is at least located on the side of the heat exchange body facing or facing away from the battery cell. The protective layer includes an insulating layer and a buffer layer. The insulating layer is bonded to the heat exchange body, and the buffer layer is bonded to the insulating layer.

2. The battery device according to claim 1, characterized in that: The insulating layer is coated on the outer surface of the heat exchange body facing and facing away from the battery cell, the buffer layer is coated on the outer surface of the insulating layer facing and facing away from the battery cell, and the thickness of the insulating layer is smaller than that of the buffer layer.

3. The battery device according to claim 1, characterized in that: The thickness of the insulating layer ranges from 0.05 mm to 2 mm, and the thickness of the buffer layer ranges from 1 mm to 10 mm.

4. The battery device according to claim 1, characterized in that: The heat exchange body includes a first heat conducting plate and a second heat conducting plate that are sealed together. The first heat conducting plate is connected to the battery cell. The second heat conducting plate is provided with a warping portion that is warped away from the battery cell. The flow channel is formed between the warping portion and the first heat conducting plate.

5. The battery device according to claim 1, characterized in that: The heat exchanger is located between the bottom plate of the box and the battery cell. The battery cell is provided with an electrode terminal and a pressure relief mechanism on the side facing the heat exchanger. The pressure relief mechanism is located between two electrode terminals. The electrode terminals of adjacent battery cells are connected in a first direction through a busbar.

6. The battery device according to claim 5, characterized in that: The heat exchange element is provided with a plurality of heat exchange areas, adjacent heat exchange areas are spaced apart in the second direction, the confluence element is located between adjacent heat exchange areas, and the first direction intersects with the second direction.

7. The battery device according to claim 6, characterized in that: The collector and the heat exchange area are spaced apart in the second direction, and the spacing is not less than 5 mm.

8. The battery device according to claim 6, characterized in that: There are multiple heat exchange components, all of which extend in the first direction, and each heat exchange component forms a heat exchange zone.

9. The battery device according to claim 8, characterized in that: In the second direction, the heat exchange member is located between the two electrode terminals of the same battery cell, and a plurality of avoidance openings are provided on the heat exchange member, and the avoidance openings are arranged corresponding to the pressure relief mechanism.

10. The battery device according to claim 9, characterized in that: The flow channel includes an inlet section, a heat exchange section and an outlet section which are connected in sequence. The inlet section and the outlet section are located at the same end of the heat exchange element in the first direction, and the inlet section and the outlet section extend in opposite directions in the second direction.

11. The battery device according to claim 10, characterized in that: The heat exchange section includes a first diverter section, a transition section and a second diverter section that are connected. The first diverter section and the second diverter section are arranged in parallel and both extend in the first direction. The transition section is located at an end of the heat exchange component away from the inlet section. The avoidance port is located between the first diverter section and the second diverter section. The first diverter section and / or the second diverter section are provided with a plurality of parallel sub-flow channels in the second direction.

12. The battery device according to claim 8, characterized in that: In the second direction, the heat exchange element is located between adjacent electrode terminals of adjacent battery cells.

13. The battery device according to claim 12, characterized in that: The flow channel includes a first heat exchange section, a connecting section and a second heat exchange section connected in sequence, the first heat exchange section and the second heat exchange section both extend in the first direction, and the same end is connected to the connecting section, the other end of the first heat exchange section is provided with an inlet, and the other end of the second heat exchange section is provided with an outlet, and the inlet and the outlet are spaced apart in the first direction.

14. The battery device according to claim 12, characterized in that: The heat exchange component further includes an auxiliary heat exchange component, which is located between the side plate of the box body and the adjacent collector in the second direction, and an auxiliary protective layer is provided on the surface of the auxiliary heat exchange component.

15. An electrical device, characterized in that: The battery device comprises a battery device as claimed in any one of claims 1 to 14, wherein the battery device is used to provide electrical energy.

Images