Heat exchange assembly, battery device and electric equipment

Abstract

The embodiment of the invention provides a heat exchange assembly, a battery device and electric equipment. The battery device comprises a box body, a heat exchange assembly and a plurality of single batteries. The plurality of single batteries are arranged in the box body; the heat exchange assembly comprises at least two heat exchange pieces, at least one heat exchange piece is arranged to be a flexible piece, and at least one heat exchange piece is arranged to be a rigid piece. The flexible part and the rigid part are arranged in a stacked mode to form at least one medium flow channel. Wherein the flexible part comprises a metal layer and an insulating layer which are arranged in a stacked mode, the insulating layer at least covers the side, away from the rigid part, of the metal layer, the heat exchange assembly further comprises an insulating structure, and the insulating structure covers the peripheral face of the metal layer. The heat exchange assembly of the battery device provided by the embodiment of the invention comprises the flexible part and the rigid part, so that the weight of the heat exchange assembly is favorably reduced, the energy density of the battery device is improved, and the insulating structure covers the peripheral surface of the metal layer of the flexible part, so that the insulating property is favorably improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a heat exchange component, a battery device and an electrical equipment. Background Art

[0002] In new energy vehicles equipped with battery devices, the battery devices can be used to provide power in whole or in part. During the use of the battery device, the battery cells in the battery device will generate heat. If the heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, a heat exchange component is usually set in the battery device. The heat exchange component is usually in contact with the battery cell for heat exchange. Therefore, how to improve the insulation performance of the heat exchange component while effectively dissipating heat has become an important research direction in this field. Summary of the invention

[0003] In view of this, the embodiments of the present application hope to provide a heat exchange component, a battery device and an electrical equipment.

[0004] The first aspect of an embodiment of the present application provides a battery device, which includes: a box body; a plurality of battery cells, wherein the plurality of battery cells are arranged in the box body; a heat exchange assembly, wherein the heat exchange assembly includes at least two heat exchange parts, at least one of which is configured as a flexible part, and at least one of which is configured as a rigid part, wherein the flexible part and the rigid part are stacked to form at least one medium flow channel, wherein the at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the plurality of battery cells; wherein the flexible part includes a stacked metal layer and an insulating layer, wherein the insulating layer at least covers a side of the metal layer away from the rigid part, and the heat exchange assembly further includes an insulating structure, wherein the insulating structure covers the outer peripheral surface of the metal layer.

[0005] In the battery device provided by the embodiment of the present application, at least one heat exchanger of the heat exchange assembly is set as a flexible member, and the weight of the flexible member is relatively light, which is conducive to reducing the weight of the heat exchange assembly, thereby improving the energy density of the battery device. On the other hand, the flexible member has a certain flexibility, which can make the heat exchange assembly fit better with the box and / or the battery cell, thereby absorbing the assembly tolerance of the heat exchange assembly, without the need to use a caulking agent or a heat conductive material, improving the fit between the heat exchange assembly and the box and / or the battery cell, and increasing the effective heat exchange area between the heat exchange assembly and the box and / or the battery cell, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. On the other hand, by setting at least one heat exchanger as a rigid member, the flexible member and the rigid member are stacked to form at least one medium flow channel, and the rigid member can support the flexible member, which is conducive to improving the overall structural strength and stability of the heat exchange assembly, and further improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly; in addition, by setting a rigid member, the heat exchange assembly has sufficient structural strength for carrying the battery cell, thereby improving the applicability of the heat exchange assembly. On the other hand, by providing an insulating structure that covers the outer peripheral surface of the metal layer of the flexible component, the possibility of insulation failure caused by exposure of the metal layer can be reduced, the insulation performance of the heat exchange component can be improved, and the reliability of the battery device can be improved.

[0006] In some embodiments, the insulating structure extends along the outer periphery of the flexible member to form an annular closed structure.

[0007] In this way, full coverage of the outer peripheral surface of the metal layer can be achieved, thereby further improving the insulation performance of the heat exchange component.

[0008] In some embodiments, a portion of the insulating structure is stacked with the insulating layer.

[0009] In this embodiment, by stacking a portion of the insulating structure with the insulating layer, on the one hand, it helps to reduce the probability of the metal layer leaking out of the gap between the insulating structure and the insulating layer. On the other hand, it helps to increase the contact area between the insulating structure and the flexible member, and reduce the risk of insulation failure caused by the insulation structure falling off. In summary, the insulation performance of the heat exchange component can be further improved.

[0010] In some embodiments, a portion of the insulating structure is located on a side of the flexible member facing away from the rigid member.

[0011] In this embodiment, the portion of the insulating structure located on the side of the flexible member away from the rigid member is actually stacked with the insulating layer, thus helping to reduce the probability of the metal layer leaking out of the gap between the insulating structure and the insulating layer, and helping to increase the contact area between the insulating structure and the flexible member. Furthermore, this portion of the insulating structure is located on the side of the flexible member away from the rigid member, which means that the insulating structure can be connected to the flexible member after the flexible member is actually manufactured and cut, thus reducing the difficulty and cost of manufacturing.

[0012] In some embodiments, a portion of the insulating structure is located on a side of the flexible member facing the rigid member.

[0013] In this embodiment, the insulating structure actually completely wraps the outer periphery of the flexible component, that is, forms a full edge wrap, which helps to further increase the contact area between the insulating structure and the flexible component, thereby further reducing the probability of the insulating structure falling off and improving the insulation performance of the heat exchange component.

[0014] In some embodiments, the insulating structure is connected to the rigid member.

[0015] In this embodiment, the insulating structure is connected to the rigid part to further reduce the risk of the insulating structure falling off. On the other hand, the insulating structure can also improve the connection strength between the rigid part and the flexible part to a certain extent and block the connection gap between the flexible part and the rigid part, which helps to reduce the probability of leakage of the heat exchange medium in the medium flow channel and improve the reliability of the heat exchange component.

[0016] In some embodiments, the outer periphery of the rigid component exceeds the outer periphery of the flexible component and forms a connection area, and the insulating structure is connected to the connection area.

[0017] In this embodiment, by connecting the insulating structure to the above-mentioned connection area, on the one hand, it helps to further reduce the risk of the insulating structure falling off, and enables the insulating structure to improve the connection strength between the rigid part and the flexible part to a certain extent and block the connection gap between the flexible part and the rigid part. On the other hand, the above-mentioned connection area can absorb the assembly tolerance of the flexible part and the rigid part to a certain extent, reducing the difficulty of assembly.

[0018] In some embodiments, the insulating structure extends from a side of the connection area toward the flexible member to a side of the flexible member away from the rigid member.

[0019] In this embodiment, by extending the insulating structure from the side of the connection area toward the flexible member to the side of the flexible member away from the rigid member, the connection strength of the insulating structure is improved while helping to reduce manufacturing difficulty and cost.

[0020] In some embodiments, a portion of the insulating structure is located on a side of the rigid member facing away from the flexible member.

[0021] In this embodiment, the insulating structure actually wraps the outer periphery of both the flexible part and the rigid part, which helps to further reduce the risk of the insulating structure falling off and further reduce the risk of the heat exchange medium leaking from the gap between the rigid part and the flexible part.

[0022] In some embodiments, the insulating layer includes one of polyamide, polyester, polyurethane, polyethylene, and polypropylene; and / or the metal layer includes one of aluminum foil, copper foil, and steel foil.

[0023] In this embodiment, the insulating layer of this selected material has not only good insulation performance, but also good corrosion resistance, high temperature resistance, waterproof performance, structural strength, etc.

[0024] In this embodiment, the metal layer selected in this way can make the flexible component have a certain structural strength and can play an isolation role.

[0025] In some embodiments, the insulating structure includes an insulating coating, and the insulating coating includes one of ceramic, epoxy resin, and silicone resin.

[0026] In this embodiment, the insulating structure includes an insulating coating, which helps to reduce manufacturing difficulty and cost. The insulating coating selected in this way not only has good insulation properties, but also has good structural strength, waterproof properties, corrosion resistance, weather resistance, high temperature resistance, etc.

[0027] In some embodiments, the insulating structure includes an insulating film, and the insulating film includes one of polyethylene, polypropylene, polyester, and polycarbonate.

[0028] In this embodiment, the insulating structure includes an insulating film, which helps to further improve the service life of the insulating structure. In addition, the insulating film selected in this way has good insulation performance while also having good waterproof performance, corrosion resistance, weather resistance, high temperature resistance, etc.

[0029] In some embodiments, the flexible member comprises a metal plasticized film.

[0030] In this embodiment, since the metal plastic film is thin and light, and a medium flow channel is formed between the metal plastic film and the heat exchange component, it is not affected by the extrusion process and does not need to meet a larger thickness requirement, so the overall thickness and weight of the heat exchange component can be reduced.

[0031] In some embodiments, the flexible member comprises an aluminum-plastic film.

[0032] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0033] In some embodiments, the flexible member includes a hot melt layer stacked on a side of the metal layer facing the rigid member and / or between the metal layer and the insulating layer.

[0034] In this embodiment, by providing a hot-melt layer, it is advantageous to combine the insulating layer with the metal layer and / or combine the flexible component with the rigid component through hot melting, which makes molding simple and has high production efficiency.

[0035] In some embodiments, the thickness of the flexible member is 0.05 mm-0.3 mm.

[0036] In this embodiment, by setting the thickness of the flexible part to 0.05mm-0.3mm, the heat exchange component made of the flexible part has a certain structural strength while making the overall thickness of the heat exchange component smaller, which is beneficial to reducing the overall volume and weight of the battery device to increase the energy density of the battery device.

[0037] In some embodiments, the elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

[0038] In this embodiment, by setting the elastic modulus of the flexible part to 0.1MPa-10000MPa, the flexible part can have a certain structural strength, thereby improving the reliability of the heat exchange component, and has a certain deformation ability, which can improve the fit between the heat exchange component and the case and / or battery cell, thereby increasing the effective heat exchange area between the heat exchange component and the case and / or battery cell, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component.

[0039] In some embodiments, the rigid member is configured as a metal plate.

[0040] In this embodiment, by setting the rigid part as a metal plate, the metal plate has both good structural strength and good thermal conductivity. That is to say, while satisfying the heat exchange efficiency of the heat exchange component, the rigid part can also play a certain supporting role for the flexible part.

[0041] A second aspect of an embodiment of the present application provides a heat exchange assembly, which includes at least two heat exchange parts, at least one of which is configured as a flexible part, and at least one of which is configured as a rigid part, the flexible part and the rigid part are stacked to form at least one medium flow channel, the at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the multiple battery cells; wherein the flexible part includes a stacked metal layer and an insulating layer, the insulating layer at least covers a side of the metal layer away from the rigid part, and the heat exchange assembly also includes an insulating structure, which covers the outer peripheral surface of the metal layer.

[0042] A third aspect of the embodiments of the present application provides an electrical device, which includes the battery device of the first aspect of the embodiments of the present application, or the heat exchange component of the second aspect of the embodiments of the present application.

[0043] The heat exchange assembly and electrical equipment of the embodiments of the present application have all the advantages of the battery device described in any of the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the structure of a vehicle provided in one embodiment of the present application; Figure 2 A three-dimensional exploded schematic diagram of a battery device provided in one embodiment of the present application; Figure 3 A schematic diagram of the axial structure of a heat exchange assembly provided in one embodiment of the present application; Figure 4 A three-dimensional exploded schematic diagram of a heat exchange assembly provided in one embodiment of the present application; Figure 5 A top view of a heat exchange assembly provided in one embodiment of the present application; Figure 6 for Figure 5 A partial schematic diagram of the AA section of the heat exchange component; Figure 7 for Figure 5 An enlarged schematic diagram of part B of the heat exchange component.

[0045] Description of Reference Numerals 1000, vehicle; 100, battery device; 10, battery cell; 20, box body; 21, box body; 211, side beam; 22, top cover; 23, bottom guard plate; 30, heat exchange component; 30a, medium flow channel; 30b, inlet; 30c, outlet; 30d, hot pressing area; 31, flexible part; 311, metal layer; 312, insulating layer; 313, structural reinforcement layer; 314, hot melt layer; 32, rigid part; 32a, connection area; 33, connecting part; 34, insulating structure; 200, controller; 300, motor. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0047] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0048] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0049] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0050] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0053] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0054] 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.

[0055] With the development of clean energy, more and more devices use electric energy as driving energy, and then power batteries that can store more electric energy and can be charged and discharged repeatedly are developing rapidly, such as lithium-ion batteries. Among them, power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields.

[0056] 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.

[0057] 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.

[0058] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, which is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0059] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0060] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0061] In some embodiments, the electrode assembly is a laminate structure.

[0062] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0063] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0064] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0065] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0066] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0067] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0068] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0069] In some embodiments, the battery cell may include a shell. The shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film. In some embodiments, the shell may be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealed bag is also included between the shell and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0070] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0071] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap is provided to cover the opening. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0072] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through a current collecting member. The electrode terminal may be disposed on an end cap, or may be disposed on the housing.

[0073] During the use of the battery device, the battery cells in the battery device will generate heat. If the heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, how to effectively dissipate the heat of the battery cells of the battery device while reducing the weight of the heat exchange component has become an important research direction in this field. In the related art, the battery cells in the battery device are cooled by providing a cooling system in the battery device box. The above-mentioned cooling system may include a plurality of aluminum water-cooling plates laid in the battery device box, and the surfaces of the plurality of water-cooling plates are in contact with the surfaces of the battery cells in the battery device. During use, a heat exchange medium such as water flows through the above-mentioned plurality of water-cooling plates, thereby taking away the heat from the battery cells and cooling the battery cells. However, the aluminum water-cooling plates in the above-mentioned cooling system have the problems of heavy weight and poor insulation performance.

[0074] In view of this, in order to reduce the weight of the heat exchange component and improve the insulation performance, an embodiment of the present application provides a battery device, which includes a box, a plurality of battery cells and a heat exchange component. The plurality of battery cells are arranged in the box, and the heat exchange component includes at least two heat exchange parts, at least one heat exchange part is set as a flexible part, and at least one heat exchange part is set as a rigid part. The flexible part and the rigid part are stacked to form at least one medium flow channel, and the at least one medium flow channel is used to conduct the heat exchange medium, and the heat exchange medium is used to exchange heat with the plurality of battery cells, wherein the flexible part includes a metal layer, and the heat exchange component also includes an insulating structure, and the insulating structure covers the outer peripheral surface of the metal layer.

[0075] In the battery device provided by the embodiment of the present application, at least one heat exchanger of the heat exchange assembly is set as a flexible member, and the weight of the flexible member is relatively light, which is conducive to reducing the weight of the heat exchange assembly, thereby improving the energy density of the battery device. On the other hand, the flexible member has a certain flexibility, which can make the heat exchange assembly fit better with the box and / or the battery cell, thereby absorbing the assembly tolerance of the heat exchange assembly, without the need to use a caulking agent or a heat conductive material, improving the fit between the heat exchange assembly and the box and / or the battery cell, and increasing the effective heat exchange area between the heat exchange assembly and the box and / or the battery cell, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. On the other hand, by setting at least one heat exchanger as a rigid member, the flexible member and the rigid member are stacked to form at least one medium flow channel, and the rigid member can support the flexible member, which is conducive to improving the overall structural strength and stability of the heat exchange assembly, and further improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly; in addition, by setting a rigid member, the heat exchange assembly has sufficient structural strength for carrying the battery cell, thereby improving the applicability of the heat exchange assembly. On the other hand, by providing an insulating structure that covers the outer peripheral surface of the metal layer of the flexible component, the possibility of insulation failure caused by exposure of the metal layer can be reduced, the insulation performance of the heat exchange component can be improved, and the reliability of the battery device can be improved.

[0076] The technical solution described in the embodiments of the present application is applicable to an electric device using a battery device. The electric device includes a battery device in any embodiment of the present application, and the battery device is used to provide electric energy.

[0077] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle 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, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; 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, and the like; the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0078] It should be noted that the technical solutions described in the embodiments of the present application are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices including battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0079] Reference Figure 1 , a controller 200, a motor 300 and a battery device 100 may be arranged inside the vehicle 1000, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 may be arranged at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Reference Figure 2In order to meet different power requirements, the battery device 100 includes a plurality of battery cells 10, which refer to the smallest unit that constitutes a battery module or a battery pack. A plurality of battery cells 10 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a plurality of battery cells 10 that are both connected in series and in parallel. A plurality of battery cells 10 can be directly connected in series, in parallel, or in a hybrid connection, and then the whole formed by the plurality of battery cells 10 is accommodated in the box 20; of course, the battery device 100 can also be a plurality of battery cells 10 that are first connected in series, in parallel, or in a hybrid connection to form a battery module, and then the plurality of battery modules are connected in series, in parallel, or in a hybrid connection to form a whole, and are accommodated in the box 20. The battery device 100 can also include other structures. For example, the battery device 100 can also include a confluence component for realizing electrical connection between the plurality of battery cells 10. Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be cylindrical, flat, rectangular, or in other shapes.

[0081] Reference Figure 2-Figure 7 The embodiment of the present application provides a battery device 100, which includes a housing 20, a plurality of battery cells 10 and a heat exchange assembly 30. The plurality of battery cells 10 are arranged in the housing 20, and the heat exchange assembly 30 includes at least two heat exchange members, at least one heat exchange member is configured as a flexible member 31, and at least one heat exchange member is configured as a rigid member 32. The flexible member 31 and the rigid member 32 are stacked to form at least one medium flow channel 30a, and at least one medium flow channel 30a is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the plurality of battery cells 10, wherein the flexible member 31 includes a metal layer 311, and the heat exchange assembly 30 also includes an insulating structure 34, and the insulating structure 34 covers the outer peripheral surface of the metal layer 311.

[0082] The multiple mentioned in the embodiments of the present application refers to a number of two or more.

[0083] Please refer to Figure 2 The battery device 100 includes a housing 20 and a plurality of battery cells 10 , wherein the plurality of battery cells 10 are disposed in the housing 20 .

[0084] The box 20 can be a simple three-dimensional structure such as a single cuboid, a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders or spheres. The material of the box 20 can be alloy materials such as aluminum alloy, iron alloy, etc., or polymer materials such as polycarbonate, polyisocyanurate foam plastics, or composite materials such as glass fiber and epoxy resin.

[0085] The box body 20 is used to encapsulate the battery cell 10 , and the box body 20 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell 10 .

[0086] As an example, the box 20 is generally a rectangular parallelepiped structure, the length direction and width direction of the box 20 are parallel to the horizontal plane, and the length direction of the box 20 is parallel to the longest side of the rectangular parallelepiped structure of the box 20. The height direction of the box 20 is perpendicular to the ground. As an example, Figure 2 As shown, the length direction of the box body 20 is represented by X, the width direction of the box body 20 is represented by Y, and the height direction of the box body 20 is represented by Z.

[0087] Reference Figure 3 and Figure 4 The heat exchange assembly 30 includes at least two heat exchange components, at least one heat exchange component is configured as a flexible component 31, and at least one heat exchange component is configured as a rigid component 32. The flexible component 31 and the rigid component 32 are stacked to form at least one medium flow channel 30a. The at least one medium flow channel 30a is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with multiple battery cells 10.

[0088] Here, the flexibility in the flexible member 31 refers to the material property of the structure, and this type of property can be a property given to the material due to the light weight of the material, or a property given to the material due to at least any one of the material's thickness, stiffness, strength, elastic modulus, etc. As an example, the material of the flexible member 31 can be selected to be a material with a lighter weight than conventional aluminum plates, steel plates, etc., and its flexibility can be controlled by the thickness, width, length, and type of material of the flexible member 31.

[0089] In the embodiment of the present application, the heat exchange assembly 30 is configured to include a flexible member 31 , which helps to reduce the weight of the heat exchange assembly 30 and thereby improve the energy density of the battery device 100 .

[0090] Furthermore, the flexible part 31 has certain expandable or contractible properties, and it can also be understood that the flexible part 31 can be an elastically deformable structure, and the flexible part 31 has the ability to deform and restore deformation, so that the heat exchange component 30 can adapt to the external contour shape of the battery cell 10 or other components through a certain elastic deformation, so as to improve the fit between the heat exchange component 30 and the box body 20 and / or the battery cell 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box body 20 and / or the battery cell 10, thereby improving the heat exchange efficiency.

[0091] Here, the rigidity in the rigid part 32 refers to the material property of the structure. This type of property can be a property given to the material due to its heavy mass, or a property given to the material due to at least any one of its thickness, rigidity, strength, elastic modulus, etc. As an example, the material of the rigid part 32 can be selected to be a metal plate similar to a conventional aluminum plate, steel plate, or a material of a structure such as a composite plate, and its rigidity can be controlled by the thickness, width, length, and type of material of the rigid part 32. The embodiment of the present application can support the flexible part 31 by configuring the heat exchange component 30 to include a rigid part 32, which is beneficial to improving the overall structural strength and stability of the heat exchange component 30.

[0092] By configuring the heat exchange component 30 to include the flexible component 31 and the rigid component 32 , the heat exchange component 30 can have a certain structural strength while having a flexible function.

[0093] The flexibility of the heat exchange assembly 30 can make the heat exchange surface of the heat exchange assembly 30 fit better with the battery cell 10 , further improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly 30 .

[0094] The flexible member 31 and the rigid member 32 are stacked to form at least one medium flow channel 30a, which means that the heat exchange assembly 30 forms the medium flow channel 30a between the flexible member 31 and the rigid member 32. In other words, the flexible member 31 constitutes at least part of the side wall of the medium flow channel 30a, and the rigid member 32 also constitutes at least part of the side wall of the medium flow channel 30a. The heat exchange medium flows in the medium flow channel 30a to achieve heat exchange with the battery cell 10.

[0095] As an example, the surface of the flexible member 31 facing the rigid member 32 is concave to form a flow channel groove, and the surface of the rigid member 32 facing the flexible member 31 is a plane, and the plane and the flow channel groove are arranged to form a medium flow channel 30a. Alternatively, the surface of the rigid member 32 facing the flexible member 31 is concave to form a flow channel groove, and the surface of the flexible member 31 facing the rigid member 32 is a plane, and the plane and the flow channel groove are arranged to form a medium flow channel 30a. Alternatively, the surfaces of the flexible member 31 and the rigid member 32 facing each other are both concave to form a flow channel groove, and the flow channel groove of the flexible member 31 and the flow channel groove of the rigid member 32 are arranged to form a medium flow channel 30a.

[0096] The medium channel 30a is used to conduct heat exchange medium. It should be noted that the specific type of heat exchange medium is not limited here, as long as it can have a heat exchange effect on the battery cell 10, for example, it can be gaseous or liquid. In the embodiment of the present application, the heat exchange medium is described as a coolant.

[0097] The specific number of the medium flow channels 30a is not limited here, and can be one or more.

[0098] At least one heat exchange component is configured as a flexible component 31, which means that the number of the flexible components 31 is one or more. In the embodiment where multiple heat exchange components are configured as flexible components 31, the flexible components 31 may be the same or different.

[0099] At least one heat exchange component is configured as a rigid component 32, which means that the number of rigid components 32 is one or more. In the embodiment where multiple heat exchange components are configured as rigid components 32, the rigid components 32 may be the same or different.

[0100] As an example, the heat exchange component 30 includes two heat exchange parts, one of which is a flexible part 31 and the other is a rigid part 32. As an example, the heat exchange component 30 includes three or more heat exchange parts, at least two of which are flexible parts 31, or at least two of which are rigid parts 32, and the flexible parts 31 and the rigid parts 32 are arranged alternately.

[0101] As an example, the rigid member 32 is a rigid plate-like structure, which can support the flexible member 31 , thereby facilitating improving the overall structural strength and stability of the heat exchange assembly 30 .

[0102] As an example, the heat exchange member has an inlet 30b and an outlet 30c, and the inlet 30b and the outlet 30c are both connected to the medium flow channel 30a. Here, the inlet 30b and the outlet 30c are used for the heat exchange medium to enter and flow out of the medium flow channel 30a. The inlet 30b and / or the outlet 30c may be formed by a rigid member 32, or by a flexible member 31.

[0103] As an example, see Figure 3 and Figure 4 The heat exchange assembly 30 further includes a connector 33 communicating with the inlet 30b and a connector 33 communicating with the outlet 30c. As an example, the connector 33 includes a water nozzle. As an example, the inlet 30b and the outlet 30c are both formed on the rigid member 32, and the connector 33 is brazed to the rigid member 32.

[0104] The principle of heat exchange of the heat exchange component 30 for the battery cell 10 is as follows: the heat exchange medium output by the heat exchange medium source (not shown) enters the medium flow channel 30a through the inlet 30b of the heat exchange component 30, and after the heat exchange medium exchanges heat with the battery cell 10, the heat exchange medium flows out through the outlet 30c of the heat exchange component 30, completing the heat exchange of the battery cell 10.

[0105] Here, the heat exchange component 30 exchanging heat with the battery cell 10 may be to dissipate heat from the battery cell 10 or to heat the battery cell 10 .

[0106] The principle of heat dissipation of the battery cell 10 by the heat exchange component 30 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel 30a through the inlet 30b of the heat exchange component 30, and after the heat exchange medium absorbs the heat generated by the battery cell 10 during operation, the heat exchange medium flows out through the outlet 30c of the heat exchange component 30, releasing the heat, thereby completing the cooling and heat dissipation of the battery cell 10.

[0107] The principle of the heat exchange component 30 heating the battery cell 10 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel 30a through the inlet 30b of the heat exchange component 30, and the heat exchange medium transfers heat to the battery cell 10. After heating the battery cell 10, the heat exchange medium flows out through the outlet 30c of the heat exchange component 30, completing the heating of the battery cell 10.

[0108] The specific location of the heat exchange assembly 30 is not limited here.

[0109] In some embodiments, at least one heat exchange assembly 30 is disposed on the top side of the battery cell 10. As an example, refer to Figure 2 The box body 20 includes a box body 21 and a top cover 22 connected to the top side of the box body 21. In this case, at least one heat exchange assembly 30 is disposed between the top cover 22 and the battery cell 10, and / or at least one heat exchange assembly 30 is disposed on a side of the top cover 22 away from the battery cell 10. As another example, the top side of the box body 20 has an opening, and the heat exchange assembly 30 covers the opening.

[0110] In some embodiments, at least one heat exchange assembly 30 is disposed on the bottom side of the battery cell 10. As an example, refer to Figure 2 The box body 20 includes a bottom guard plate 23 connected to the bottom side of the box body 21. In this case, at least one heat exchange assembly 30 is disposed between the bottom guard plate 23 and the battery cell 10, and / or at least one heat exchange assembly 30 is disposed on a side of the bottom guard plate 23 away from the battery cell 10. As another example, the bottom side of the box body 20 has an opening, and the heat exchange assembly 30 covers the opening.

[0111] In some embodiments, at least one heat exchange assembly 30 is disposed on one side of the battery cell 10 along the length direction or the width direction of the box body 20. Figure 2 The box body 21 includes a side beam 211, which is used to constrain the battery cell 10. The heat exchange assembly 30 is arranged between the side beam 211 and the battery cell 10, or the heat exchange assembly 30 is arranged on the side of the side beam 211 away from the battery cell 10.

[0112] In some embodiments, at least one heat exchange assembly 30 is disposed between two adjacent battery cells 10. As an example, at least one heat exchange assembly 30 is disposed between the large surfaces of two adjacent battery cells 10, where the large surface refers to the surface with the largest area among the surfaces of the battery cells 10.

[0113] In the embodiment where the heat exchange assembly 30 is disposed between the box body 20 and the battery cell 10, the relative positional relationship between the rigid part 32 and the flexible part 31 of the heat exchange assembly 30 and the battery cell 10 is not limited, for example, the rigid part 32 may be oriented toward the battery cell 10, and the flexible part 31 may be oriented toward the box body 20, thus providing a stronger support force for the battery cell 10. Alternatively, the flexible part 31 may be oriented toward one side of the battery cell 10, and the rigid part 32 may be oriented toward the box body 20, thus improving the tightness of the heat exchange assembly 30 and the battery cell 10.

[0114] Reference Figure 5 and Figure 6 The flexible member 31 includes an insulating layer 312 and a metal layer 311 which are stacked, and the insulating layer 312 at least covers the side of the metal layer 311 which is away from the rigid member 32. By making the flexible member 31 include the insulating layer 312 and the metal layer 311, the flexible member 31 can have a certain structural strength while having a flexible function.

[0115] Here, the direction in which the insulating layer 312 and the metal layer 311 are stacked is the same as the direction in which the flexible member 31 and the rigid member 32 are stacked. The insulating layer 312 and the metal layer 311 can be connected by, for example, heat pressing, bonding, or the like.

[0116] As an example, the flexible member 31 includes a metal plastic film, the metal layer 311 is an intermediate layer in the metal plastic film, and the insulating layer 312 is a plastic layer of the metal plastic film. Here, the metal plastic film includes but is not limited to aluminum plastic film, steel plastic film, copper plastic film, etc.

[0117] As a specific example, the metal layer 311 includes one or more of aluminum foil, copper foil, and steel foil.

[0118] As a specific example, the insulating layer 312 includes one of polyamide (PA), polyester (PET), polyurethane (PU), polyethylene (PE), and polypropylene (PP).

[0119] The insulating layer 312 at least covers the side of the metal layer 311 away from the rigid part 32, so that the metal layer 311 is insulated from the box 20 and / or the battery cell 10. As an example, the outer surface of the flexible part 31 away from the rigid part 32 is formed by the insulating layer 312.

[0120] The insulating layer 312 may be a single layer or multiple layers, and the materials of the multiple insulating layers 312 may be the same or different. Furthermore, the insulating layer 312 may be a single layer or multiple layers, and the materials of the multiple metal layers 311 may be the same or different.

[0121] In the embodiment where the insulating layer 312 is multi-layered, the multi-layered insulating layers 312 may all be located on the side of the metal layer 311 away from the rigid member 32, or at least one insulating layer 312 may be disposed between the metal layer 311 and the rigid member 32. In the embodiment where both the insulating layer 312 and the metal layer 311 are multi-layered, at least one insulating layer 312 may be disposed between the multi-layered metal layers 311.

[0122] It should be noted that, refer to Figure 6 In addition to the insulating layer 312 and the metal layer 311, the flexible member 31 may also include other layer structures, such as an anti-corrosion layer (not shown in the figure) for anti-corrosion, a structural reinforcement layer 313 for improving structural strength, a welding layer for connecting the various layer structures of the flexible member 31 and / or for connecting with the rigid member 32, etc. One or more of the above layer structures may be arranged between the insulating layer 312 and the metal layer 311.

[0123] The present application proposes that in the process of producing the above-mentioned flexible member 31, a large piece of the flexible member 31 is usually produced first, and then cut into the required size. After cutting, the outer peripheral surface of the metal layer 311 will be exposed to the outside and cannot be covered by the insulating layer 312. Even in the case of no cutting, the outer peripheral surface of the metal layer 311 in the flexible member 31 prepared in the common process is usually exposed to the outside. The leakage of the metal layer 311 will cause the risk of insulation failure during the use of the heat exchange component 30.

[0124] Here, the outer peripheral surface of the metal layer 311 specifically refers to the outer surface in the direction perpendicular to the stacking direction. Taking the flexible member 31 as a rectangular plate structure as an example, the outer peripheral surface of the metal layer 311 includes two outer surfaces of the metal layer 311 along the length direction of the flexible member 31 and two outer surfaces of the metal layer 311 along the width direction.

[0125] For the above problems, refer to Figure 7 In this embodiment, the heat exchange component 30 further includes an insulating structure 34, and the insulating structure 34 covers the above-mentioned outer peripheral surface of the metal layer 311. In this way, the possibility of insulation failure caused by exposure of the metal layer 311 can be reduced, the insulation performance of the heat exchange component 30 can be improved, and the reliability of the battery device 100 can be improved.

[0126] Here, the insulating structure 34 covers the outer circumference of the metal layer 311 specifically means that the insulating structure 34 covers part or all of the outer circumference of the metal layer 311. As an example, the insulating structure 34 extends along the outer circumference of the flexible member 31 to form a ring-shaped closed structure, so that the outer circumference of the metal layer 311 is fully covered.

[0127] Here, the insulating structure 34 may be any structure having an insulating function. As an example, the insulating structure 34 includes an insulating coating, which may be sprayed onto the outer peripheral surface of the metal layer 311. Alternatively, the insulating structure 34 includes an insulating film, which may be connected to the outer peripheral surface of the metal layer 311 by hot pressing, bonding, etc. Here, the specific materials of the insulating coating and the insulating film are not limited.

[0128] In the actual manufacturing process, the insulating structure 34 may be disposed on the outer peripheral surface of the metal layer 311 after the flexible member 31 is manufactured, and then the flexible member 31 is connected to the rigid member 32. Alternatively, the insulating structure 34 may be disposed on the outer peripheral surface of the metal layer 311 after the flexible member 31 is connected to the rigid member 32.

[0129] In the battery device 100 of the embodiment of the present application, at least one heat exchange component of the heat exchange assembly 30 is configured as a flexible component 31. The flexible component 31 is light in weight, which helps to reduce the weight of the heat exchange assembly 30 and further improve the energy density of the battery device 100.

[0130] On the other hand, the flexible part 31 has a certain flexibility, which can make the heat exchange component 30 fit better with the case 20 and / or the battery cell 10, thereby absorbing the assembly tolerance of the heat exchange component 30 without the use of filler or thermal conductive material, thereby improving the fit between the heat exchange component 30 and the case 20 and / or the battery cell 10, and increasing the effective heat exchange area between the heat exchange component 30 and the case 20 and / or the battery cell 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0131] On the other hand, by setting at least one heat exchange component as a rigid component 32, the flexible component 31 and the rigid component 32 are stacked to form at least one medium flow channel 30a. The rigid component 32 can support the flexible component 31, which is beneficial to improve the overall structural strength and stability of the heat exchange component 30, and further improve the heat exchange efficiency and heat exchange effect of the heat exchange component 30. In addition, by setting the rigid component 32, the heat exchange component 30 has sufficient structural strength to carry the battery cell 10, thereby improving the applicability of the heat exchange component 30.

[0132] On the other hand, by providing an insulating structure 34 that covers the outer peripheral surface of the metal layer 311 of the flexible component 31, the possibility of insulation failure caused by exposure of the metal layer 311 can be reduced, the insulation performance of the heat exchange component 30 can be improved, and the reliability of the battery device 100 can be improved.

[0133] In some embodiments, the insulating structure 34 extends along the outer periphery of the flexible member 31 to form an annular closed structure. In this way, the outer periphery of the metal layer 311 can be fully covered, thereby further improving the insulation performance of the heat exchange assembly 30.

[0134] It should be noted that, in some embodiments, the insulating structure 34 may not form a closed annular structure, but may be formed into a strip structure or an open annular structure, so as to cover a portion of the outer circumference of the metal layer 311 according to actual use requirements.

[0135] In some embodiments, a portion of the insulating structure 34 is stacked with the insulating layer 312 .

[0136] Here, the direction in which the insulating structure 34 and the insulating layer 312 are stacked is the same as the direction in which the insulating layer 312 and the metal layer 311 are stacked. As an example, the insulating structure 34 forms at least one flange, and the at least one flange is stacked with the insulating layer 312, and can be located on the side of the insulating layer 312 away from the metal layer 311, or on the side of the insulating layer 312 facing the metal layer 311, without limitation.

[0137] In this embodiment, by stacking a portion of the insulating structure 34 with the insulating layer 312, on the one hand, it helps to reduce the probability of the metal layer 311 leaking out of the gap between the insulating structure 34 and the insulating layer 312. On the other hand, it helps to increase the contact area between the insulating structure 34 and the flexible member 31, and reduce the risk of insulation failure caused by the insulation structure 34 falling off. In summary, the insulation performance of the heat exchange assembly 30 can be further improved.

[0138] In some embodiments, a portion of the insulating structure 34 is located on a side of the flexible member 31 facing away from the rigid member 32 .

[0139] Here, the insulating structure 34 may cover part or all of a surface of the flexible member 31 on one side of the rigid member 32 .

[0140] In this embodiment, the portion of the insulating structure 34 located on the side of the flexible member 31 away from the rigid member 32 is actually stacked with the insulating layer 312. Therefore, as mentioned above, it helps to reduce the probability of the metal layer 311 leaking out of the gap between the insulating structure 34 and the insulating layer 312, and helps to increase the contact area between the insulating structure 34 and the flexible member 31. Furthermore, this portion of the insulating structure 34 is located on the side of the flexible member 31 away from the rigid member 32, which means that the insulating structure 34 can be connected to the flexible member 31 after the flexible member 31 is actually manufactured and cut, thereby reducing the difficulty and cost of manufacturing.

[0141] In some embodiments, a portion of the insulating structure 34 is located on a side of the flexible member 31 facing away from the rigid member 32 , and a portion of the insulating structure 34 is located on a side of the flexible member 31 facing the rigid member 32 .

[0142] As an example, the insulating structure 34 may form a first flange and a second flange, wherein the first flange is located on the side of the flexible member 31 away from the rigid member 32, and the second flange is located on the side of the flexible member 31 facing the rigid member 32. In this embodiment, in the actual manufacturing process, the flexible member 31 may be manufactured and cut first, and then the insulating structure 34 may be disposed on the flexible member 31, and finally the flexible member 31 may be connected to the rigid member 32.

[0143] In this embodiment, the insulating structure 34 actually completely wraps the outer periphery of the flexible part 31, that is, a full edge is formed. This helps to further increase the contact area between the insulating structure 34 and the flexible part 31, thereby further reducing the probability of the insulating structure 34 falling off and improving the insulation performance of the heat exchange component 30.

[0144] In some embodiments, the insulating structure 34 is connected to the rigid member 32 .

[0145] Here, the connection method of the insulating structure 34 and the rigid part 32 is not limited. For example, when the insulating structure 34 includes an insulating coating, the range of coating can be increased so that a part of the insulating coating is attached to the rigid part 32. For example, when the insulating structure 34 includes an insulating film, the insulating film can be connected to the rigid part 32 by hot pressing, bonding, etc. Alternatively, when the rigid part 32 is an insulating plate, the insulating structure 34 can be formed as an integrated structure with the rigid part 32.

[0146] In this embodiment, the insulating structure 34 is connected to the rigid part 32, which helps to further reduce the risk of the insulating structure 34 falling off. On the other hand, the insulating structure 34 can also improve the connection strength between the rigid part 32 and the flexible part 31 to a certain extent and block the connection gap between the flexible part 31 and the rigid part 32, which helps to reduce the probability of leakage of the heat exchange medium in the medium flow channel 30a and improve the reliability of the heat exchange assembly 30.

[0147] In some embodiments, reference Figure 7 The outer periphery of the rigid part 32 exceeds the outer periphery of the flexible part 31 and forms a connecting area 32a, and the insulating structure 34 is connected to the connecting area 32a.

[0148] Here, the outer periphery of the rigid part 32 exceeds the outer periphery of the flexible part 31, which may mean that the outer periphery of the rigid part 32 as a whole exceeds the outer periphery of the flexible part 31, that is, the connection area 32a is actually formed into an annular area. Alternatively, it may also mean that the outer periphery of the rigid part 32 exceeds the outer periphery of the flexible part 31 in one or several specific directions.

[0149] Here, the insulating structure 34 may be connected to a surface of the connection region 32 a facing the flexible member 31 , or may be connected to a surface of the connection region 32 a facing away from the flexible member 31 , and there is no limitation to this.

[0150] Along the distribution direction of the flexible member 31 and the connection area 32a, the length range of the connection area 32a is not limited, and the length range of the connection area 32a in each direction can be the same or different.

[0151] In a projection plane perpendicular to the stacking direction of the rigid member 32 and the flexible member 31 , the projection of the insulating structure 34 may cover part or all of the projection of the connecting region 32 a .

[0152] In some specific embodiments, along the distribution direction of the flexible member 31 and the connecting region 32 a , the length of the insulating structure 34 located in the connecting region 32 a is not less than 1 / 3 of the entire length of the connecting region 32 a .

[0153] In this embodiment, by connecting the insulating structure 34 to the above-mentioned connection area 32a, on the one hand, it helps to further reduce the risk of the insulating structure 34 falling off, and the insulating structure 34 can improve the connection strength between the rigid part 32 and the flexible part 31 to a certain extent and block the connection gap between the flexible part 31 and the rigid part 32. On the other hand, the above-mentioned connection area 32a can absorb the assembly tolerance of the flexible part 31 and the rigid part 32 to a certain extent, reducing the difficulty of assembly.

[0154] In some embodiments, reference Figure 7 The insulating structure 34 extends from the connecting area 32 a toward the side of the flexible member 31 to the side of the flexible member 31 away from the rigid member 32 .

[0155] That is, a portion of the insulating structure 34 is connected to the connection area 32a, and another portion is connected to the side of the flexible member 31 away from the rigid member 32. Here, in the projection plane perpendicular to the stacking direction of the rigid member 32 and the flexible member 31, the insulating structure 34 may cover part or all of the flexible member 31.

[0156] In this embodiment, by extending the insulating structure 34 from the side of the connection area 32a toward the flexible member 31 to the side of the flexible member 31 away from the rigid member 32, the connection strength of the insulating structure 34 is improved while helping to reduce manufacturing difficulty and cost.

[0157] In some embodiments, a portion of the insulating structure 34 is located on a side of the rigid component 32 facing away from the flexible component 31 .

[0158] Here, the insulating structure 34 may cover part or all of the surface of the rigid part 32 facing away from the flexible part 31 .

[0159] As an example, the insulating structure 34 includes a first flange and a second flange. The first flange is located on a side of the flexible member 31 away from the rigid member 32 , and the second flange is located on a side of the rigid member 32 away from the flexible member 31 .

[0160] In this embodiment, the insulating structure 34 actually wraps the outer periphery of the flexible part 31 and the rigid part 32 at the same time, which helps to further reduce the risk of the insulating structure 34 falling off and further reduce the risk of the heat exchange medium leaking from the gap between the rigid part 32 and the flexible part 31.

[0161] In some embodiments, the insulating layer 312 includes one or more of polyamide (PA), polyester (PET), polyurethane (PU), polyethylene (PE), and polypropylene (PP).

[0162] In this embodiment, the insulating layer 312 made of such selected materials not only has good insulation performance, but also has good anti-corrosion performance, high temperature resistance, waterproof performance, structural strength, etc.

[0163] In some embodiments, the metal layer 311 includes one of aluminum foil, copper foil and steel foil.

[0164] In this embodiment, the metal layer 311 made of such a material can make the flexible member 31 have a certain structural strength and can play an isolation role.

[0165] In some embodiments, the insulating structure 34 includes an insulating coating, and the insulating coating includes one or more of ceramics (such as aluminum oxide, boron nitride, zirconium oxide, etc.), epoxy resin, and silicone resin.

[0166] In this embodiment, the insulating structure 34 includes an insulating coating, which helps to reduce manufacturing difficulty and cost. The insulating coating selected in this way not only has good insulation properties, but also has good structural strength, waterproof properties, corrosion resistance, weather resistance, high temperature resistance, etc.

[0167] In some embodiments, the insulating structure 34 includes an insulating film, and the insulating film includes one of polyethylene (PE), polypropylene (PP), polyester (PET), and polycarbonate (PC).

[0168] In this embodiment, the insulating structure 34 includes an insulating film, which helps to further improve the service life of the insulating structure 34. In addition, the insulating film selected in this way has good insulation performance while also having good waterproof performance, corrosion resistance, weather resistance, high temperature resistance, etc.

[0169] In some embodiments, reference Figure 6 The flexible member 31 and the rigid member 32 are hot pressed to form a hot pressing area 30d and a medium flow channel 30a, and the flexible member 31 and the rigid member 32 are connected to each other in at least a part of the hot pressing area 30d.

[0170] That is, the flexible member 31 and the rigid member 32 are connected by hot pressing, and the hot pressing area 30d and the medium flow channel 30a are formed by hot pressing. This molding method is simple.

[0171] Here, the flexible member 31 is sealed by a hot pressing process, and the hot pressing process can effectively ensure that the heat exchange component 30 has good sealing performance and is not prone to cracking.

[0172] In this embodiment, the flexible member 31 is sealed by a hot pressing process, that is, a hot pressing area 30d is formed by hot pressing. The hot pressing area 30d separates the heat exchange component 30 to form at least one medium flow channel 30a. This molding method is simple.

[0173] As an example, the heat-pressing area 30d includes a heat-sealing area and a non-heat-sealing area, and the non-heat-sealing area and the medium flow channel 30a are respectively located on both sides of the heat-sealing area, which is conducive to reducing the width of the heat-sealing area, improving the problem of excessive temperature caused by the heat-sealing area being too wide, affecting the heat-pressing quality and damaging the flexible member 31. In addition, the non-heat-sealing area can also form a buffer zone for stress release when the flexible member 31 is folded, improving the situation where stress concentration occurs in the heat-sealing area and causes damage to the heat-sealing area.

[0174] In the related art, the heat exchange assembly 30 is formed by welding two pieces of high-strength aluminum alloy. However, since high-strength aluminum alloy (5 series, 6 series, etc.) has a high alloy content, alloy elements will precipitate during welding, affecting the welding quality.

[0175] In this embodiment, the heat exchange component 30 is configured to include a flexible part 31 and a rigid part 32. The flexible part 31 and the rigid part 32 are hot pressed to form a hot pressing area 30d and a medium flow channel 30a. The hot pressing temperature (150°C ± 10°C) is lower than the brazing temperature in the related art, and alloy elements will not precipitate, which is beneficial to further improve the structural strength of the heat exchange component 30.

[0176] In some embodiments, the flexible member 31 includes a metal plasticized film.

[0177] The flexible member 31 is a single-layer or multi-layer film.

[0178] Here, the metal-plasticized film is a metal-plastic composite material, that is, it includes a metal layer 311 and a plastic layer, and the plastic layer is formed as the above-mentioned insulating layer 312 .

[0179] In this embodiment, since the metal plastic film is thin and light in weight, and a medium flow channel 30a is formed between the metal plastic film and the heat exchange component, it is not affected by the extrusion process and does not need to meet a larger thickness requirement, so the overall thickness and weight of the heat exchange component 30 can be reduced.

[0180] In some embodiments, the flexible member 31 comprises an aluminum-plastic film.

[0181] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0182] In some embodiments, reference Figure 6 The flexible member 31 includes a hot melt layer 314 stacked on the side of the metal layer 311 facing the rigid member 32 and / or between the metal layer 311 and the insulating layer 312 .

[0183] Here, the heat-melting layer 314 is made of a heat-melting material.

[0184] As an example, at least one hot melt layer 314 is disposed on a side of the metal layer 311 facing the rigid component 32 and is connected to the rigid component 32 .

[0185] In this embodiment, by providing the hot melt layer 314, it is advantageous to combine the insulating layer 312 with the metal layer 311 and / or combine the flexible component 31 with the rigid component 32 through hot melting, which makes molding simple and production efficiency high.

[0186] In some embodiments, the thickness of the flexible member 31 is 0.05 mm-0.3 mm.

[0187] As an example, the thickness of the flexible member 31 is any one of 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.25 mm, 0.27 mm, 0.28 mm, 0.3 mm or any value therebetween.

[0188] In this embodiment, by setting the thickness of the flexible part 31 to 0.05mm-0.3mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength while making the overall thickness of the heat exchange component 30 smaller, which is beneficial to reducing the overall volume and weight of the battery device 100, so as to increase the energy density of the battery device 100.

[0189] In some embodiments, the thickness of the flexible member 31 is 0.08 mm-0.2 mm.

[0190] As an example, the thickness of the flexible member 31 is any one of 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, and 0.2 mm, or any value therebetween.

[0191] In this embodiment, by setting the thickness of the flexible part 31 to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength, and the overall thickness of the heat exchange component 30 is further reduced, which is beneficial to further reduce the overall volume and weight of the battery device 100, so as to further increase the energy density of the battery device 100.

[0192] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0193] As an example, the elastic modulus of the flexible member 31 can be any one of 0.1 MPa, 1 MPa, 50 MPa, 100 MPa, 150 MPa, 200 MPa, 300 MPa, 500 MPa, 800 MPa, 1000 MPa, 1300 MPa, 1500 MPa, 1800 MPa, 2000 MPa, 2500 MPa, 2800 MPa, 3000 MPa, 3500 MPa, 4000 MPa, 4500 MPa, 5000 MPa, 5500 MPa, 6000 MPa, 6500 MPa, 7000 MPa, 7500 MPa, 8000 MPa, 8500 MPa, 8800 MPa, 9000 MPa, 9500 MPa, 9700 MPa, and 10000 MPa, or any point value between any two of them.

[0194] The elastic modulus describes the unit strain caused by unit stress when a solid is subjected to force within a certain range. It is one of the basic physical quantities of a material. The larger the elastic modulus, the greater the stiffness of the material and the greater its compressive resistance. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0195] The elastic modulus of the flexible member 31 may be measured by at least one of a static tensile test method, a dynamic test method, a sonic velocity method, a nanoindentation method, and a bending method. The measuring instrument may include a nanoindenter and a universal testing machine.

[0196] For example, the elastic modulus of the flexible member 31 can be measured at room temperature and pressure by a nanoindentation method, which uses a tiny indenter to indent the surface of the flexible member 31 and calculates the elastic modulus by analyzing the relationship between the indentation depth and the load.

[0197] In this embodiment, by setting the elastic modulus of the flexible part 31 to 0.1MPa-10000MPa, the flexible part 31 has a certain structural strength, thereby improving the reliability of the heat exchange component 30, and has a certain deformation ability, which can improve the fit between the heat exchange component 30 and the box body 20 and / or the battery cell 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box body 20 and / or the battery cell 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0198] In some embodiments, the elongation at break of the flexible member 31 is greater than the elongation at break of the rigid member 32. The elongation at break is a percentage of the elongation of the material when it is stretched to break to the original length. It is used to measure the deformation capacity that the material can withstand during the stretching process, that is, the elongation at break indicates the ductility of the material when it is stretched under force.

[0199] The elongation at break of the flexible member 31 is greater than the elongation at break of the rigid member 32 . In other words, when stretched, the ductility of the flexible member 31 is greater than the ductility of the rigid member 32 .

[0200] In some embodiments, the elongation at break of the flexible member 31 is in a range of 30% to 300%.

[0201] The elongation at break of the flexible member 31 may be any one of 30%, 50%, 60%, 80%, 90%, 100%, 130%, 150%, 160%, 170%, 190%, 200%, 220%, 150%, 260%, 280%, 290%, 300% or any value therebetween.

[0202] In this embodiment, by setting the elongation at break of the flexible member 31 to be in the range of 30% to 300%, the flexible member 31 can have certain impact resistance and puncture resistance as well as certain structural strength.

[0203] In some embodiments, the elongation at break of the rigid member 32 is in a range of 1% to 50%.

[0204] The elongation at break of the rigid member 32 may be any one of 1%, 3%, 5%, 6%, 8%, 9%, 10%, 13%, 15%, 16%, 17%, 19%, 20%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 43%, 45%, 48%, 50% or any value therebetween.

[0205] In this embodiment, by setting the elongation at break of the rigid component 32 to be in the range of 1% to 50%, the rigid component 32 can have sufficient structural strength, which is beneficial to improving the overall structural strength of the heat exchange assembly 30.

[0206] In some embodiments, the rigid member 32 is configured as a metal plate.

[0207] As an example, the rigid member 32 may be an aluminum alloy plate, and the outer surface of the plate may be insulated.

[0208] In this embodiment, by setting the rigid part 32 as a metal plate, the metal plate has both good structural strength and good thermal conductivity. That is to say, while satisfying the heat exchange component 30 with a certain heat exchange efficiency, the rigid part 32 can also play a certain supporting role for the flexible part 31.

[0209] In some embodiments, the medium flow channel 30 a includes a plurality of sub-flow channels, each battery cell 10 corresponds to a plurality of sub-flow channels, and an extension direction of the sub-flow channels corresponding to the battery cell 10 is perpendicular to a length direction of the battery cell 10 .

[0210] The plurality of sub-flow channels are connected to form a medium flow channel 30 a .

[0211] The extension direction of the sub-channels is perpendicular to the length direction of the battery cell 10 , that is, the multiple sub-channels are arranged along the length direction of the battery cell 10 , so that the length direction of the battery cell 10 corresponds to the multiple sub-channels.

[0212] It can be understood that the temperature of the heat exchange medium will gradually increase along the flow direction of the heat exchange medium. Therefore, by corresponding each battery cell 10 to multiple sub-flow channels, it is helpful to improve the uniformity of the temperature of the battery cell 10.

[0213] The battery device 100 provided in the embodiment of the present application is further described below with reference to a specific embodiment.

[0214] Reference Figure 2-Figure 7The battery device 100 includes a housing 20, a heat exchange assembly 30 and a plurality of battery cells 10. The plurality of battery cells 10 are arranged in the housing 20. The heat exchange assembly 30 includes at least two heat exchange members, at least one heat exchange member is configured as a flexible member 31, and at least one heat exchange member is configured as a rigid member 32. The elastic modulus of at least a portion of the flexible member 31 is smaller than the elastic modulus of the rigid member 32. The flexible member 31 and the rigid member 32 are stacked to form at least one medium flow channel 30a. At least one medium flow channel 30a is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with a plurality of battery cells 10. The flexible member 31 and the rigid member 32 are formed by hot pressing a hot pressing area 30d and a medium flow channel 30a, and the flexible member 31 and the rigid member 32 are connected to each other in at least a portion of the hot pressing area 30d.

[0215] The flexible member 31 is a layered structure. The flexible member 31 includes an insulating layer 312 and a metal layer 311 which are stacked. The insulating layer 312 at least covers a side of the metal layer 311 which is away from the rigid member 32 .

[0216] The heat exchange component 30 further includes an insulating structure 34 , which includes an insulating coating or an insulating film. The insulating structure 34 covers the outer peripheral surface of the metal layer 311 .

[0217] The outer periphery of the rigid member 32 exceeds the outer periphery of the flexible member 31 and forms a connection area 32 a . The insulating structure 34 extends from the connection area 32 a toward the flexible member 31 to the side of the flexible member 31 away from the rigid member 32 .

[0218] The embodiment of the present application also provides a heat exchange component 30, referring to Figure 3-Figure 7 The heat exchange component 30 includes at least two heat exchange parts, at least one heat exchange part is set as a flexible part 31, and at least one heat exchange part is set as a rigid part 32. The flexible part 31 and the rigid part 32 are stacked to form at least one medium flow channel 30a. The at least one medium flow channel 30a is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with multiple battery cells 10. The flexible part 31 includes a metal layer 311. The heat exchange component 30 also includes an insulating structure 34, and the insulating structure 34 covers the outer peripheral surface of the metal layer 311.

[0219] The relevant technical details of the heat exchange component 30 in the embodiment of the present application can be referred to the description of the relevant parts in the above text, and will not be repeated here.

[0220] An embodiment of the present application further provides an electrical device, which includes a battery device 100 as described in any of the above embodiments, or a heat exchange component 30 as described in any of the above embodiments.

[0221] The heat exchange assembly 30 and the electrical equipment of the embodiment of the present application have all the advantages of the battery device 100 described in any of the above embodiments, which will not be repeated here.

[0222] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0223] The above description is only a preferred embodiment of the present application and is 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: The battery device comprises: Box; A plurality of battery cells, wherein the plurality of battery cells are arranged in the box; A heat exchange assembly, wherein the heat exchange assembly comprises at least two heat exchange members, at least one of which is configured as a flexible member, and at least one of which is configured as a rigid member, wherein the flexible member and the rigid member are stacked to form at least one medium flow channel, wherein the at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the plurality of battery cells; The flexible part includes a stacked metal layer and an insulating layer, the insulating layer at least covers a side of the metal layer away from the rigid part, and the heat exchange component also includes an insulating structure, which covers the outer peripheral surface of the metal layer.

2. The battery device according to claim 1, characterized in that: The insulating structure extends along the outer periphery of the flexible member to form an annular closed structure.

3. The battery device according to claim 1, characterized in that: A portion of the insulating structure is stacked with the insulating layer.

4. The battery device according to claim 1, characterized in that: A portion of the insulating structure is located on a side of the flexible member facing away from the rigid member.

5. The battery device according to claim 4, characterized in that: A portion of the insulating structure is located on a side of the flexible component facing the rigid component.

6. The battery device according to claim 1, characterized in that: The insulating structure is connected to the rigid member.

7. The battery device according to claim 6, characterized in that: The outer periphery of the rigid part exceeds the outer periphery of the flexible part and forms a connection area, and the insulating structure is connected to the connection area.

8. The battery device according to claim 7, characterized in that: The insulating structure extends from a side of the connecting area toward the flexible member to a side of the flexible member away from the rigid member.

9. The battery device according to claim 6, characterized in that: A portion of the insulating structure is located on a side of the rigid component facing away from the flexible component.

10. The battery device according to claim 1, characterized in that: The insulating layer comprises one of polyamide, polyester, polyurethane, polyethylene and polypropylene; and / or The metal layer includes one of aluminum foil, copper foil and steel foil.

11. The battery device according to any one of claims 1 to 10, characterized in that: The insulating structure includes an insulating coating, and the insulating coating includes one of ceramic, epoxy resin, and silicone resin.

12. The battery device according to any one of claims 1 to 10, characterized in that: The insulating structure includes an insulating film, and the insulating film includes one of polyethylene, polypropylene, polyester, and polycarbonate.

13. The battery device according to any one of claims 1 to 10, characterized in that: The flexible member includes a metal plasticized film.

14. The battery device according to claim 13, characterized in that: The flexible member comprises an aluminum-plastic film.

15. The battery device according to any one of claims 1 to 10, characterized in that: The flexible member includes a hot melt layer stacked on a side of the metal layer facing the rigid member and / or between the metal layer and the insulating layer.

16. The battery device according to any one of claims 1 to 10, characterized in that: The thickness of the flexible member is 0.05mm-0.3mm.

17. The battery device according to any one of claims 1 to 10, characterized in that: The elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

18. The battery device according to any one of claims 1 to 7, characterized in that: The rigid member is configured as a metal plate.

19. A heat exchange component, characterized in that: The heat exchange assembly comprises at least two heat exchange members, at least one of which is a flexible member, and at least one of which is a rigid member, wherein the flexible member and the rigid member are stacked to form at least one medium flow channel, wherein the at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with a battery cell; The flexible part includes a stacked metal layer and an insulating layer, the insulating layer at least covers a side of the metal layer away from the rigid part, and the heat exchange component also includes an insulating structure, which covers the outer peripheral surface of the metal layer.

20. An electrical equipment, characterized in that: The electrical equipment comprises the battery device according to any one of claims 1 to 18, or the heat exchange component according to claim 19.

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