Battery devices and power-consuming devices

Abstract

The embodiments of the present application provide a battery device and an electrical device. The battery device includes a housing, a thermal management component and a plurality of battery cells. The plurality of battery cells are arranged in a receiving cavity. The thermal management component is arranged on the side wall of the housing, and the thermal management component is used to heat and cool the plurality of battery cells. At least part of the area of the thermal management component is set as a flexible structure. The battery device also includes at least one first medium flow channel, and the flexible structure forms at least part of the side wall of the first medium flow channel. The battery device includes multiple states, and in at least one of the multiple states, the first medium flow channel is filled with a heat-insulating medium, and the thermal management component is used to insulate the battery cells. The influence of the temperature of the housing on the temperature of the battery cells close to the housing can be reduced, which is beneficial to improving the temperature uniformity of each battery cell and improving the performance and service life of the battery device. The flexible structure is relatively light in weight, which is beneficial to reducing the production cost of the thermal management component and reducing the weight of the battery device.

Description

Technical Field

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

[0002] In new energy vehicles equipped with battery systems, these systems can provide full or partial power. During use, heat is exchanged between the battery housing and the external environment, potentially affecting the temperature of the battery cells near the edges of the housing. This, in turn, can reduce the temperature uniformity of the battery cells. This reduced temperature uniformity can adversely affect the performance and service life of the battery system. Therefore, improving the temperature uniformity of battery cells has become an important research topic in this field. Summary of the Invention

[0003] In view of this, embodiments of the present application hope to provide a battery device and an electrical device that can improve the temperature uniformity of battery cells to a certain extent.

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

[0005] A box body, wherein the box body has a receiving cavity inside;

[0006] a plurality of battery cells, wherein the plurality of battery cells are arranged in the accommodating cavity;

[0007] a thermal management component disposed on a side wall of the housing, the thermal management component being configured to heat and cool the plurality of battery cells, at least a portion of the thermal management component being configured as a flexible structure; the battery device further comprising at least one first medium flow channel, the flexible structure forming at least a portion of a side wall of the first medium flow channel;

[0008] The battery device includes multiple states, and in at least one of the multiple states, the first medium flow channel is filled with a heat-insulating medium, and the heat-management component is used to insulate the battery cell.

[0009] The battery device provided in an embodiment of the present application includes a housing, a thermal management component, and a plurality of battery cells. On one hand, by positioning the thermal management component on the sidewalls of the housing, the thermal management component can manage the temperature of the housing sidewalls, thereby reducing the impact of the housing temperature on the temperature of the battery cells adjacent to the housing, thereby facilitating improved temperature uniformity across the battery cells and, in turn, enhancing the performance and service life of the battery device. Furthermore, by configuring at least a portion of the thermal management component as a flexible structure, the lightweight flexible structure facilitates reduced mass, lowers production costs, and reduces the weight of the battery device. Furthermore, the flexible structure's certain flexibility allows for better conformity between the thermal management component and the housing and / or battery cells, thereby improving the applicability of the thermal management component.

[0010] In some embodiments, the first medium flow channel is formed inside the thermal management component; and / or,

[0011] The first medium flow channel is formed between the heat management component and the side wall of the box body.

[0012] The first medium flow channel may be formed inside the thermal management component, which is beneficial to improving the manufacturability and sealing performance of the first medium flow channel.

[0013] A first medium flow channel may also be formed between the thermal management component and the side wall of the box body. In this way, on the one hand, the material used for the thermal management component can be reduced, thereby reducing cost and weight. On the other hand, the medium in the first medium flow channel can be in direct contact with the box body, thereby improving heat exchange efficiency.

[0014] In some embodiments, the battery device includes a first state and a second state different from the first state;

[0015] In the first state, the first medium flow channel is filled with a heat exchange medium, and the thermal management component is used to exchange heat for the battery cell; in the second state, the first medium flow channel is not filled with the heat exchange medium, and the thermal conductivity of the heat insulating medium is lower than the thermal conductivity of the heat exchange medium.

[0016] In this embodiment, in the first state, the first medium flow channel is filled with a heat exchange medium, and the thermal management component is used to exchange heat with the housing to achieve heating or cooling of the housing, that is, to manage the temperature of the housing and indirectly manage the temperature of the battery cells, thereby improving the temperature uniformity of the battery cells. In the second state, the heat exchange medium in the first medium flow channel is discharged. This can improve the leakage of the heat exchange medium, thereby preventing the leaked heat exchange medium from slowly seeping into the battery device, causing insulation failure, or even a short circuit and fire in the battery device.

[0017] In some embodiments, the thermal insulation medium includes air.

[0018] In some embodiments, the battery device includes a fourth state and a fifth state different from the fourth state;

[0019] In the fourth state, the first medium flow channel is filled with the heat insulating medium; in the fifth state, the first medium flow channel is not filled with the heat insulating medium.

[0020] In this embodiment, in the fourth state, the thermal management component is used to insulate the housing and / or battery cells by filling the first medium flow channel with a thermal insulation medium, thereby improving the thermal insulation performance of the battery pack. In the fifth state, the thermal insulation medium in the first medium flow channel is discharged. This can reduce the risk of thermal insulation medium leakage, thereby preventing the leaked thermal insulation medium from slowly seeping into the battery pack and causing insulation failure or even short circuit and fire.

[0021] In some embodiments, the thermal management component further includes a storage component, and the storage component is used to store the medium discharged from the first medium flow channel.

[0022] Here, the specific type of the storage element is not limited. The storage element is a container with a certain volume, which is used to store the medium discharged from the first medium flow channel so that it can be reused.

[0023] In some embodiments, the thermal management component includes a thermal insulation material.

[0024] In this embodiment, by configuring the thermal management component to include a heat-insulating material, the thermal management component can block heat exchange between the side wall of the box and the external environment, and / or the thermal management component can block heat exchange between the side wall of the box and the battery cell, thereby improving the temperature uniformity of the battery cell.

[0025] In some embodiments, the thermal management component is disposed in the accommodating cavity, and / or the thermal management component is disposed outside the accommodating cavity.

[0026] In this way, the heat management component can be used to exchange heat with the side walls of the box and / or battery cells to improve the temperature uniformity of the battery cells, or the heat management component can be used to block the heat exchange between the side walls of the box and the battery cells to improve the temperature uniformity of the battery cells.

[0027] In this way, the side walls of the box can be used for heat exchange through the thermal management component to indirectly manage the temperature of the battery cells, thereby improving the temperature uniformity of the battery cells. Alternatively, the heat management component can be used to block the heat exchange between the side walls of the box and the external environment to indirectly manage the temperature of the battery cells, thereby improving the temperature uniformity of the battery cells.

[0028] In some embodiments, the flexible structure is formed on the side wall of the box by hot pressing.

[0029] The connection structure is simple and reliable.

[0030] In some embodiments, the flexible structure includes a metal plasticized film.

[0031] In this embodiment, the thin and lightweight metal-plasticized film, coupled with the formation of a first medium flow channel between the metal-plasticized film and the heat exchange component, is unaffected by the extrusion process and eliminates the need for strict thickness requirements. This reduces the overall thickness and weight of the thermal management component. Furthermore, the thermal management component's insulating properties reduce the likelihood of insulation failure. This reduces the risk of the thermal management component interacting with the heat exchange medium flowing within, further minimizing the possibility of corrosion and leakage of the heat exchange medium.

[0032] In some embodiments, the flexible structure includes an aluminum-plastic film.

[0033] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0034] In some embodiments, the flexible structure is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked in sequence.

[0035] In this embodiment, the flexible structure, composed of a stack of metallic and non-metallic layers, is thin and lightweight. Furthermore, by forming a first medium flow channel between the flexible structure and the sidewall of the housing, it is unaffected by the extrusion process and eliminates the need for high thickness requirements, thereby reducing the overall thickness and weight of the thermal management component. Furthermore, the thermal management component does not react with the heat exchange medium flowing within, eliminating the possibility of corrosion or leakage.

[0036] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0037] By setting the metal layer to one or more of aluminum foil, copper foil and steel foil, the flexible structure can have a certain structural strength and can play an isolation role.

[0038] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0039] By setting the non-metallic layer to be one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene, the flexible structure can have a certain waterproof effect.

[0040] In some embodiments, the non-metallic layer is a hot-melt layer.

[0041] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0042] In some embodiments, the flexible structure is a layered structure, comprising a first anti-corrosion layer, an isolation layer, and a second anti-corrosion layer arranged in sequence, wherein the first anti-corrosion layer is closer to the first medium flow channel than the second anti-corrosion layer.

[0043] In this embodiment, by configuring the flexible structure to include a first anti-corrosion layer, an isolation layer, and a second anti-corrosion layer arranged in sequence, the second anti-corrosion layer is closer to the first medium flow channel than the first anti-corrosion layer, which is beneficial to improving the reliability of the thermal management component.

[0044] In some embodiments, the thickness of the flexible structure is 0.05 mm-0.3 mm.

[0045] In this embodiment, by setting the thickness of the flexible structure to 0.05 mm-0.3 mm, the thermal management component made of the flexible structure has a certain structural strength while the overall thickness of the thermal management component is reduced, which is beneficial to reducing the overall volume and weight of the battery device and increasing the energy density of the battery device.

[0046] In some embodiments, the thickness of the flexible structure is 0.08 mm-0.2 mm.

[0047] In this embodiment, by setting the thickness of the flexible structure to 0.08 mm-0.2 mm, the thermal management component made of the flexible structure has a certain structural strength, while the overall thickness of the thermal management component is further reduced, which is beneficial to further reduce the overall volume and weight of the battery device, thereby further increasing the energy density of the battery device.

[0048] In some embodiments, the elastic modulus of the flexible structure is 0.1 MPa-10000 MPa.

[0049] In this embodiment, by setting the elastic modulus of the flexible structure to 0.1MPa-10000MPa, the flexible structure not only has a certain structural strength, thereby improving the reliability of the thermal management component, but also has a certain deformation ability, which can improve the fit between the thermal management component and the casing and / or battery cell, thereby increasing the effective heat exchange area between the thermal management component and the casing and / or battery cell, thereby improving the heat exchange efficiency and heat exchange effect of the thermal management component.

[0050] In some embodiments, the thermal management component includes a flexible component and a rigid component, and the flexible component and the rigid component are located between the battery cell and the side wall of the box.

[0051] Exemplarily, the flexible member and the rigid member are stacked to form at least one first medium flow channel. This means that the thermal management member forms the first medium flow channel between the flexible member and the rigid member. In other words, the flexible member forms at least a portion of the sidewalls of the first medium flow channel, and the rigid member also forms at least a portion of the sidewalls of the first medium flow channel. The heat exchange medium circulates within the first medium flow channel to exchange heat with the battery cells.

[0052] In some embodiments, the battery device further includes the heat exchange component, which is arranged on at least one side of the battery cell along the height direction of the battery device, and the interior of the heat exchange component has at least one second medium flow channel, and the at least one second 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.

[0053] In this embodiment, during use of the battery device, the battery cells in the battery device generate heat. By providing a heat exchange component, the battery cells of the battery device are effectively dissipated, which is beneficial to further improve the performance and service life of the battery device.

[0054] In some embodiments, the heat exchange assembly includes at least two heat exchange parts, at least one of the heat exchange parts is configured as a flexible part, and at least one of the heat exchange parts is configured as a rigid part. The elastic modulus of at least a portion of the flexible part is smaller than the elastic modulus of the rigid part. The flexible part and the rigid part are stacked to form the at least one second medium flow channel.

[0055] In this embodiment, by configuring at least one heat exchange component as a flexible component, the flexible component is lighter in weight, which is beneficial to reducing the weight of the heat exchange assembly, reducing the production cost of the heat exchange assembly, and reducing the weight of the battery device. In addition, the flexible component has a certain degree of flexibility, which can make the heat exchange component fit better with the housing and / or battery cells, thereby absorbing the assembly tolerance of the heat exchange component, eliminating the need for caulking agents or thermally conductive materials, improving the fit between the heat exchange component and the housing and / or battery cells, and increasing the effective heat exchange area between the heat exchange component and the housing and / or battery cells, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component. On the other hand, by configuring at least one heat exchange component as a rigid component, the flexible component and the rigid component are stacked to form at least one second medium flow channel. The rigid component can support the flexible component, which is beneficial to improving the overall structural strength and stability of the heat exchange component, further improving the heat exchange effect of the heat exchange component. In addition, by configuring the rigid component, the heat exchange component has sufficient structural strength to support the battery cells, thereby improving the applicability of the heat exchange component.

[0056] A second aspect of an embodiment of the present application provides an electrical device, comprising the battery device described above.

[0057] The battery device of an electrical device provided in an embodiment of the present application includes a housing, a thermal management component, and a plurality of battery cells. On one hand, by disposing the thermal management component on the sidewalls of the housing, the thermal management component can manage the temperature of the housing sidewalls, thereby reducing the impact of the housing temperature on the temperature of the battery cells adjacent to the housing, thereby facilitating improved temperature uniformity among the battery cells, thereby enhancing the performance and service life of the battery device. Furthermore, by disposing at least a portion of the thermal management component as a flexible structure, the lightweight flexible structure facilitates reducing the weight of the thermal management component, lowering its production cost, and reducing the weight of the battery device. Furthermore, the flexible structure has a certain degree of flexibility, allowing the thermal management component to better fit the housing and / or battery cells, thereby improving the applicability of the thermal management component. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic structural diagram of a vehicle provided in one embodiment of the present disclosure;

[0059] Figure 2 A schematic exploded perspective view of a battery device according to an embodiment of the present disclosure;

[0060] Figure 3 A schematic diagram of the connection structure between the box and the thermal management component provided in one embodiment of the present disclosure;

[0061] Figure 4 A schematic exploded perspective view of a heat exchange assembly according to an embodiment of the present disclosure;

[0062] Figure 5 A schematic exploded perspective view of a flexible component provided in one embodiment of the present disclosure.

[0063] Description of Reference Numerals

[0064] 10. Battery cell; 20. Box body; 21. First box body part; 22. Second box body part; 23. Accommodation cavity; 24. Side wall; 30. Heat exchange component; 31. Flexible part; 311. Hot pressing area; 312. Second medium flow channel; 313. First anti-corrosion layer; 314. Isolation layer; 315. Second anti-corrosion layer; 32. Rigid part; 33. Connecting part; 40. Thermal management part; 41. First medium flow channel; 42. Inlet part; 43. Outlet part; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0065] Unless otherwise specified, all embodiments and optional embodiments of the present disclosure can be combined with each other to form new technical solutions.

[0066] Unless otherwise specified, all technical features and optional technical features disclosed herein can be combined with each other to form a new technical solution.

[0067] With the development of clean energy, more and more devices are using electricity as a driving force. Consequently, power batteries, such as lithium-ion batteries, that can store large amounts of electricity and undergo multiple charge and discharge cycles are rapidly developing. These batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields.

[0068] In the embodiment of the present disclosure, 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.

[0069] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present disclosure.

[0070] A battery cell typically includes an electrode assembly. This assembly consists of a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0071] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0072] 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.

[0073] In some embodiments, the electrode assembly is a laminate structure.

[0074] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets can be alternately stacked.

[0075] 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.

[0076] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0077] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0078] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0079] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0080] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0081] In some embodiments, a battery cell may include an outer shell. This outer 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 outer shell may be sealed or non-sealed. For example, in a non-sealed outer shell, the outer shell protects the electrode assembly and includes a sealing bag between the outer shell and the electrode assembly, which encapsulates the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. In a sealed outer shell, the outer shell encapsulates the electrode assembly, electrolyte, and other components.

[0082] 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 the present disclosure.

[0083] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0084] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collecting member. The electrode terminal may be provided on an end cap or on the housing.

[0085] In some embodiments, the energy storage equipment includes an energy storage container, an energy storage cabinet, etc.

[0086] In the related art, during the use of the battery device, the casing of the battery device exchanges heat with the air of the external environment, which may cause the temperature of the casing to be too high or too low, and the battery cells near the edge of the casing will exchange heat with the casing, which will affect the temperature of the battery cells near the edge of the casing, and may further reduce the temperature uniformity of the battery cells of the battery device. The reduction in temperature uniformity will have an adverse effect on the performance and service life of the battery device.

[0087] In view of this, in order to improve the temperature uniformity of the battery cells, an embodiment of the present disclosure provides a battery device, which includes a housing, a thermal management component and a plurality of battery cells. The plurality of battery cells are arranged in a receiving cavity. The thermal management component is arranged on the side wall of the housing, and the thermal management component is used to manage the temperature of the plurality of battery cells, and at least part of the area of the thermal management component is set as a flexible structure. The battery device also includes at least one first medium flow channel, and the flexible structure forms at least part of the side wall of the first medium flow channel. The battery device includes multiple states, and in at least one of the multiple states, the first medium flow channel is filled with a thermal insulation medium, and the thermal management component is used to insulate the battery cells.

[0088] The battery device provided in an embodiment of the present application includes a housing, a thermal management component, and a plurality of battery cells. On one hand, by positioning the thermal management component on the sidewalls of the housing, the thermal management component can manage the temperature of the housing sidewalls, thereby reducing the impact of the housing temperature on the temperature of the battery cells adjacent to the housing, thereby facilitating improved temperature uniformity across the battery cells and, in turn, enhancing the performance and service life of the battery device. Furthermore, by configuring at least a portion of the thermal management component as a flexible structure, the lightweight flexible structure facilitates reduced mass, lowers production costs, and reduces the weight of the battery device. Furthermore, the flexible structure's certain flexibility allows for better conformity between the thermal management component and the housing and / or battery cells, thereby improving the applicability of the thermal management component.

[0089] The technical solutions described in the embodiments of the present disclosure are applicable to an electrical device using a battery device. The electrical device includes the battery device of any embodiment of the present disclosure, and the battery device is used to provide electrical energy.

[0090] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present disclosure do not impose any special restrictions on the above-mentioned electrical devices.

[0091] It should be noted that the technical solutions described in the embodiments of the present disclosure 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 an example.

[0092] Please refer to Figure 1 , a controller 200, a motor 300 and a battery device 100 may be provided 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 provided 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 disclosure, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used 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.

[0093] See also Figure 2 To meet varying power requirements, the battery device 100 includes multiple battery cells 10. A battery cell 10 is the smallest unit that makes up a battery module or battery pack. Multiple battery cells 10 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel configurations within the battery cell 10. Multiple battery cells 10 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire battery cell 10 is housed within the housing 20. Alternatively, the battery device 100 can be constructed by first connecting multiple battery cells 10 in series, in parallel, or in a hybrid configuration to form a battery module. The battery modules are then connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 20. The battery device 100 can also include other structures. For example, the battery device 100 can include a busbar to electrically connect the multiple 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 other shapes.

[0094] See also Figures 2 to 3The embodiment of the present disclosure provides a battery device 100, which includes a housing 20, a thermal management component 40 and a plurality of battery cells 10. The plurality of battery cells 10 are arranged in a receiving cavity 23. The thermal management component 40 is arranged on the side wall 24 of the housing 20, and the thermal management component 40 is used to manage the temperature of the plurality of battery cells 10. At least part of the area of the thermal management component 40 is set as a flexible structure. The battery device 100 also includes at least one first medium flow channel 41, and at least one first medium flow channel 41 is used to conduct heat exchange medium. The flexible structure forms at least part of the side wall of the first medium flow channel 41. The battery device 100 includes multiple states, and in at least one of the multiple states, the first medium flow channel 41 is filled with a thermal insulation medium, and the thermal management component 40 is used to insulate the battery cells 10.

[0095] The multiple mentioned in the embodiments of the present application refers to a number of two or more.

[0096] The housing 20 may be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as rectangular parallelepiped, cylinder, or sphere. The housing 20 may be made of an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0097] The box body 20 is used to encapsulate the battery cells 10 . The box body 20 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 10 .

[0098] For example, the box 20 is generally a rectangular parallelepiped structure, the length and width of the box 20 are parallel to the horizontal plane, and the length of the box 20 is parallel to the longest side of the rectangular parallelepiped structure of the box 20. The height of the box 20 is perpendicular to the ground.

[0099] Here, the flexibility of the flexible structure refers to the material properties of the structure. This type of property can be a property imparted to the material due to its light weight, or a property imparted to the material due to at least one of its thickness, stiffness, strength, elastic modulus, etc. As an example, the material of the flexible structure can be selected to be lighter than conventional structures such as aluminum plates or steel plates, and its flexibility can be controlled by the thickness, width, length, and material type of the flexible structure. By configuring the thermal management component 40 to include a flexible structure, the disclosed embodiments facilitate reducing the weight of the thermal management component 40.

[0100] The flexible structure has certain expandable or contractible properties. It can also be understood that the flexible structure can be a structure with certain elastic deformation. The flexible structure has the ability to deform and recover deformation, so that the thermal management component 40 can be formed into a contoured structure. The thermal management component 40 can better adapt to the side wall 24 of the box 20, the battery cell 10 or the external contour shape of other components to improve the fit between the thermal management component 40 and the box 20 and / or the battery cell 10, thereby increasing the effective heat exchange area between the thermal management component 40 and the box 20 and / or the battery cell 10, thereby improving the temperature management effect of the battery cell 10.

[0101] Here, the heat management member 40 may be connected to the side wall 24 of the box body 20 , or may not be connected to the side wall 24 of the box body 20 .

[0102] The heat management component 40 may directly manage the temperature of the plurality of battery cells 10 , or may manage the temperature of the battery cells 10 by managing the temperature of the sidewall 24 of the box body 20 .

[0103] The heat management component 40 can be disposed inside the accommodating cavity 23 or outside the accommodating cavity 23 .

[0104] Here, the thermal management component 40 can be configured with a flexible structure in part and a rigid structure in another part, where the elastic modulus of the flexible structure is greater than that of the rigid structure. For example, the connection area of the thermal management component 40 is a rigid structure, and the flow channel area of the thermal management component 40 is a flexible structure.

[0105] The thermal management component 40 may also be configured as a flexible structure in its entirety.

[0106] For example, the flexible structure is formed on the side wall 24 of the box body 20 by heat pressing. This connection structure is simple and reliable.

[0107] Exemplarily, the box body 20 includes a frame, a top wall and a bottom wall. The frame, the top wall and the bottom wall surround and form a receiving cavity 23 . The frame constitutes the side wall 24 of the box body 20 , and the thermal management component 40 is disposed on the frame.

[0108] The battery device 100 provided in the embodiment of the present application includes a housing 20, a thermal management component 40, and a plurality of battery cells 10. On one hand, by disposing the thermal management component 40 on the sidewall 24 of the housing 20, the thermal management component 40 can manage the temperature of the sidewall 24 of the housing 20, thereby reducing the impact of the housing 20 temperature on the temperature of the battery cells 10 adjacent to the housing 20, thereby facilitating improved temperature uniformity among the battery cells 10 and, in turn, enhancing the performance and service life of the battery device 100. Furthermore, by disposing at least a portion of the thermal management component 40 as a flexible structure, the lightweight flexible structure facilitates reducing the weight of the thermal management component 40, lowering the production cost of the thermal management component 40, and reducing the weight of the battery device 100. Furthermore, the flexible structure has a certain degree of flexibility, which allows the thermal management component 40 to better fit the housing 20 and / or the battery cells 10, thereby improving the applicability of the thermal management component 40.

[0109] There are many ways for the heat management component 40 to manage the temperature of the multiple battery cells 10. For example, it can be achieved through thermal insulation to achieve the temperature management of the battery cells 10, or it can be achieved through heat exchange to achieve the temperature management of the battery cells 10.

[0110] In some embodiments, see Figures 2 to 3 The battery device 100 further includes a first medium flow channel 41. The at least one first medium flow channel 41 is used to conduct a heat exchange medium, and the flexible structure forms at least a portion of a side wall of the first medium flow channel 41.

[0111] Here, the medium can flow in the first medium flow channel 41 to achieve heat insulation or heat exchange, thereby achieving temperature management of the battery cell 10 .

[0112] The first medium flow channel 41 may be formed inside the heat management component 40 , which is beneficial to improving the manufacturability and sealing performance of the first medium flow channel 41 .

[0113] Alternatively, a first medium flow channel 41 may be formed between the thermal management component 40 and the side wall 24 of the housing 20. In this way, on the one hand, the material used for the thermal management component 40 can be reduced, thereby reducing cost and weight. On the other hand, the medium in the first medium flow channel 41 can be in direct contact with the housing 20, thereby improving heat exchange efficiency.

[0114] In the embodiment where a first medium flow channel 41 is formed between the thermal management component 40 and the side wall 24 of the box body 20, the first medium flow channel 41 may be formed between the thermal management component 40 and the outer wall 24 of the box body 20, or between the thermal management component 40 and the inner wall 24 of the box body 20, or between the thermal management component 40 and both the outer wall 24 of the box body 20 and the inner wall 24 of the box body 20.

[0115] The first medium flow channel 41 is filled with a heat exchange medium, and the heat management component 40 is at least used to exchange heat with the side wall 24 of the box body 20 .

[0116] In some embodiments, see Figures 2 to 3 The first medium flow channel 41 is filled with a heat exchange medium, and the thermal management component 40 is at least used to exchange heat with the side wall 24 of the box body 20.

[0117] During the use of the battery device 100, for example, when the external environment is relatively cold, the external environment may lower the temperature of the housing 20. In this case, the housing 20 can be heated by the thermal management component 40. This can reduce, to a certain extent, the possibility that the temperature of the battery cells 10 close to the side walls 24 of the housing 20 is too low due to the side walls 24 of the housing 20 being too low, thereby improving the temperature uniformity of the battery cells 10.

[0118] Similarly, when the external environment is hot, the external environment may increase the temperature of the box body 20. At this time, the box body 20 can be cooled by the thermal management component 40. To a certain extent, the possibility of the battery cell 10 near the side wall 24 of the box body 20 being too high due to the side wall 24 of the box body 20 being too high can be reduced, thereby improving the temperature uniformity of the battery cell 10.

[0119] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can achieve heat exchange effect on the battery cell 10, for example, it can be gaseous or liquid.

[0120] The heat management component 40 is at least used for exchanging heat with the side wall 24 of the box body 20 , which means that the heat management component 40 can be used for exchanging heat with the side wall 24 of the box body 20 , and can also exchange heat with the battery cell 10 in addition to exchanging heat with the side wall 24 of the box body 20 .

[0121] In this embodiment, the heat management component 40 is used at least for heat exchange with the side wall 24 of the box body 20 to achieve heating or cooling of the box body 20, that is, to manage the temperature of the box body 20, and indirectly achieve temperature management of the battery cell 10, which is beneficial to improving the temperature uniformity of the battery cell 10.

[0122] In some embodiments, please refer to Figures 2 to 3 The battery device 100 includes a first state and a second state different from the first state. In the first state, the first medium flow channel 41 is filled with a heat exchange medium, and the thermal management component 40 is used to exchange heat with the battery cell 10. In the second state, the first medium flow channel 41 is not filled with a heat exchange medium.

[0123] Exemplarily, the battery device 100 further includes a control system, which is used to control the working state of the thermal management component 40 .

[0124] In the first state, the first medium flow channel 41 is filled with heat exchange medium, and the thermal management component 40 is used to exchange heat with the housing 20 , that is, the thermal management component 40 needs to heat and cool the housing 20 .

[0125] In the second state, the first medium flow channel 41 is not filled with the heat exchange medium. That is, the heat exchange medium in the first medium flow channel 41 is discharged, and the battery device 100 is in a non-use state.

[0126] Here, by not filling the first medium flow channel 41 with the heat exchange medium, leakage of the heat exchange medium can be improved, thereby preventing the leaked heat exchange medium from slowly seeping into the battery device 100 and causing insulation failure or even short circuit and fire of the battery device 100.

[0127] For example, see Figure 3 The heat management component 40 further includes an inlet portion 42 and an outlet portion 43 . The inlet of the inlet portion 42 and the outlet of the outlet portion 43 are both in communication with the first medium flow channel 41 .

[0128] Here, the inlet and outlet of the heat management component 40 are used to be connected to pipelines of an air conditioning system of a vehicle or an electrical device or a liquid storage device such as a water tank.

[0129] In this embodiment, in the first state, by filling the first medium flow channel 41 with a heat exchange medium, the thermal management component 40 is used to exchange heat with the housing 20, thereby achieving heating or cooling of the housing 20, that is, achieving temperature management of the housing 20, and indirectly managing the temperature of the battery cells 10, thereby facilitating improved temperature uniformity of the battery cells 10. In the second state, by discharging the heat exchange medium in the first medium flow channel 41, leakage of the heat exchange medium can be improved, thereby preventing the leaked heat exchange medium from slowly seeping into the battery device 100, causing insulation failure, or even short circuit and fire in the battery device 100.

[0130] In some embodiments, see Figures 2 to 3 The first medium flow channel 41 is filled with a heat insulating medium.

[0131] It should be noted that the specific type of thermal insulation medium is not limited here.

[0132] Exemplarily, the thermal insulation medium is air.

[0133] In this embodiment, by filling the first medium flow channel 41 with a heat-insulating medium, it is beneficial to provide heat insulation between the external environment and the side wall 24 of the box body 20 (i.e., it can reduce the impact of the external environment on the temperature of the side wall 24 of the box body 20), and / or, it is beneficial to provide heat insulation between the side wall 24 of the box body 20 and the battery cell 10 (i.e., it can reduce the impact of the side wall 24 of the box body 20 on the temperature of the battery cell 10), thereby improving the thermal insulation effect of the battery device 100.

[0134] In some embodiments, see Figures 2 to 3 The battery device 100 also includes a third state. In the third state, the first medium flow channel 41 is filled with a heat-insulating medium, and the thermal conductivity of the heat-insulating medium is lower than the thermal conductivity of the heat exchange medium.

[0135] That is, in the third state, the heat exchange medium in the first medium flow channel 41 can be discharged and filled with air to achieve heat insulation for the battery device 100 and achieve a heat preservation effect.

[0136] The thermal insulation medium can be air or other media such as liquid with low thermal conductivity.

[0137] Here, the thermal conductivity of the heat-insulating medium is lower than the thermal conductivity of the heat-exchange medium. Thus, in the third state, it is beneficial to provide thermal insulation between the external environment and the side wall 24 of the box body 20 (i.e., it can reduce the impact of the external environment on the temperature of the side wall 24 of the box body 20), and / or, it is beneficial to provide thermal insulation between the side wall 24 of the box body 20 and the battery cell 10 (i.e., it can reduce the impact of the side wall 24 of the box body 20 on the temperature of the battery cell 10), thereby improving the thermal insulation effect of the battery device 100.

[0138] In some embodiments, see Figures 2 to 3 The battery device 100 includes a fourth state and a fifth state different from the fourth state. In the fourth state, the first medium flow channel 41 is filled with a heat insulating medium. In the fifth state, the first medium flow channel 41 is not filled with a heat insulating medium.

[0139] In the fourth state, the first medium flow channel 41 is filled with a heat-insulating medium, and the heat-management component 40 is used to insulate the box body 20 and / or the battery cell 10 , thereby improving the heat preservation effect of the battery device 100 .

[0140] In the fifth state, the first medium flow channel 41 is not filled with the heat insulating medium. That is, the heat insulating medium in the first medium flow channel 41 is discharged, and the battery device 100 is in a non-use state.

[0141] Here, by not filling the first medium flow channel 41 with the heat insulating medium, leakage of the heat exchange medium can be improved, thereby preventing the leaked heat insulating medium from slowly seeping into the battery device 100 and causing insulation failure or even short circuit and fire of the battery device 100.

[0142] In this embodiment, in the fourth state, by filling the first medium flow channel 41 with a thermal insulation medium, the thermal management component 40 is used to insulate the housing 20 and / or the battery cells 10, thereby improving the thermal insulation performance of the battery assembly 100. In the fifth state, by draining the thermal insulation medium from the first medium flow channel 41, leakage of the thermal insulation medium can be reduced, thereby preventing the leaked thermal insulation medium from slowly seeping into the battery assembly 100, causing insulation failure, or even a short circuit and fire in the battery assembly 100.

[0143] In some embodiments, see Figures 2 to 3 The thermal management component 40 further includes a storage component for storing the medium discharged from the first medium flow channel 41 .

[0144] Here, the storage element may be used to store the heat exchange medium discharged from the first medium flow channel 41 , and may also be used to store the heat insulation medium discharged from the first medium flow channel 41 .

[0145] Here, the specific type of the storage member is not limited. The storage member is a container with a certain volume, which is used to store the medium discharged from the first medium flow channel 41 so that it can be reused.

[0146] In some embodiments, the thermal management component 40 includes a thermal insulation material.

[0147] Here, the heat-insulating material refers to a material with a low heat-insulating coefficient, such as inorganic fibers, organic foams, fireproof materials, etc.

[0148] Examples of inorganic fibers include rock wool and glass wool.

[0149] Examples of organic foams include polyurethane foam, extruded polystyrene board (XPS board), and expanded polystyrene board (EPS board).

[0150] The fireproof material may be, for example, aluminum silicate fiber, expanded perlite / foam glass, etc.

[0151] In this embodiment, by setting the thermal management component 40 to include a heat-insulating material, the thermal management component 40 can block the heat exchange between the side wall 24 of the box 20 and the external environment, and / or the thermal management component 40 can block the heat exchange between the side wall 24 of the box 20 and the battery cell 10, thereby improving the temperature uniformity of the battery cell 10.

[0152] In some embodiments, see Figure 2 The thermal management component 40 is disposed in the accommodating cavity 23 .

[0153] In this way, the side wall 24 of the box body 20 and / or the battery cell 10 can be heat-exchanged by the thermal management component 40 to improve the temperature uniformity of the battery cell 10, or the heat-management component 40 can be used to block the heat exchange between the side wall 24 of the box body 20 and the battery cell 10 to improve the temperature uniformity of the battery cell 10.

[0154] In some embodiments, the thermal management component 40 is disposed outside the accommodating cavity 23 .

[0155] In this way, the side wall 24 of the box body 20 can be heat-exchanged by the thermal management component 40 to indirectly manage the temperature of the battery cell 10, thereby improving the temperature uniformity of the battery cell 10. Alternatively, the heat management component 40 can be used to block the heat exchange between the side wall 24 of the box body 20 and the external environment to indirectly manage the temperature of the battery cell 10, thereby improving the temperature uniformity of the battery cell 10.

[0156] In some embodiments, the flexible structure comprises a metal plasticized film.

[0157] The flexible structure is a single-layer or multi-layer film.

[0158] Here, the metal-plasticized film is a metal-plastic composite material, that is, it includes a metal layer and a plastic layer.

[0159] In this embodiment, the thin and lightweight metal-plasticized film, coupled with the formation of the first medium flow channel 41 between the metal-plasticized film and the heat exchange element, is unaffected by the extrusion process and eliminates the need for high thickness requirements. Consequently, the overall thickness and weight of the heat management element 40 can be reduced. Furthermore, the insulation properties of the heat management element 40 reduce the likelihood of insulation failure. This reduces the risk of reaction between the heat management element 40 and the heat exchange medium flowing therein, further minimizing the possibility of corrosion and leakage of the heat exchange medium.

[0160] Exemplarily, the flexible structure includes an aluminum-plastic film.

[0161] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0162] In some embodiments, the flexible structure is a layered structure, and the flexible structure includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0163] Here, the flexible structure includes a metal layer and a non-metal layer, that is, a composite material composed of the metal layer and the non-metal layer.

[0164] For example, the metal layer and the non-metal layer may be formed by hot pressing or hot melting.

[0165] Here, the number of metal layers and non-metal layers is not limited.

[0166] In this embodiment, the flexible structure, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a first medium flow channel 41 between the flexible structure and the sidewall 24 of the housing 20, the first medium flow channel 41 is unaffected by the extrusion process and eliminates the need for a high thickness requirement. This reduces the overall thickness and weight of the thermal management component 40. Furthermore, the thermal management component 40 does not react with the heat exchange medium flowing therein, eliminating the possibility of corrosion or leakage.

[0167] In some embodiments, the flexible structure is a layered structure, and the flexible structure includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0168] Exemplarily, the non-metallic layer is located between the metal layer and the side wall 24 of the box body 20 .

[0169] Here, by arranging the non-metallic layer on the side of the metal layer facing the side wall 24 of the box body 20 , the non-metallic layer can be connected to the side wall 24 of the box body 20 through hot pressing.

[0170] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0171] By setting the metal layer to one or more of aluminum foil, copper foil and steel foil, the flexible structure can have a certain structural strength and can play an isolation role.

[0172] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene.

[0173] By setting the non-metallic layer to be one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene, the flexible structure can have a certain waterproof effect.

[0174] For example, a non-metallic layer made of a corrosion-resistant material having acid and alkali corrosion resistance may be selected, or in other words, additives may be added to the non-metallic layer to make the non-metallic layer have acid and alkali corrosion resistance.

[0175] In some embodiments, the non-metallic layer is a hot melt layer.

[0176] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0177] In some embodiments, the thickness of the flexible structure is 0.05 mm to 0.3 mm.

[0178] For example, it is any one of 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.15mm, 0.2mm, 0.21mm, 0.22mm, 0.25mm, 0.27mm, 0.28mm, and 0.3mm, or a point value between any two of them.

[0179] In this embodiment, by setting the thickness of the flexible structure to 0.05 mm-0.3 mm, the thermal management component 40 made of the flexible structure has a certain structural strength while the overall thickness of the thermal management component 40 is reduced, which is beneficial to reducing the overall volume and weight of the battery device 100 and increasing the energy density of the battery device 100.

[0180] In some embodiments, the thickness of the flexible structure is 0.08 mm to 0.2 mm.

[0181] For example, it is any one of 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, and 0.2mm, or a point value between any two of them.

[0182] In this embodiment, by setting the thickness of the flexible structure to 0.08 mm-0.2 mm, the thermal management component 40 made of the flexible structure has a certain structural strength, while further making the overall thickness of the thermal management component 40 smaller, which is beneficial to further reduce the overall volume and weight of the battery device 100, thereby further increasing the energy density of the battery device 100.

[0183] In some embodiments, the elastic modulus of the flexible structure is 0.1 MPa-10000 MPa.

[0184] Illustratively, the elastic modulus of the flexible structure 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 value between any two of them.

[0185] The elastic modulus describes the unit strain caused by unit stress when a solid is subjected to a certain force range. It is one of the fundamental physical quantities of a material. The larger the elastic modulus, the greater the material's stiffness and compressive resistance. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0186] In this embodiment, by setting the elastic modulus of the flexible structure to 0.1 MPa-10000 MPa, the flexible structure not only has a certain structural strength, thereby improving the reliability of the thermal management component 40, but also has a certain deformation ability, which can improve the fit between the thermal management component 40 and the case 20 and / or the battery cell 10, thereby increasing the effective heat exchange area between the thermal management component 40 and the case 20 and / or the battery cell 10, thereby improving the heat exchange efficiency and heat exchange effect of the thermal management component 40.

[0187] In some embodiments, the thermal management member 40 includes a flexible member 31 and a rigid member 32 . The flexible member 31 and the rigid member 32 are located between the battery cell 10 and the side wall 24 of the box body 20 .

[0188] Exemplarily, the flexible member 31 and the rigid member 32 are stacked to form at least one first medium flow channel 41. This means that the thermal management member 40 forms the first medium flow channel 41 between the flexible member 31 and the rigid member 32. In other words, the flexible member 31 constitutes at least a portion of the sidewall 24 of the first medium flow channel 41, and the rigid member 32 also constitutes at least a portion of the sidewall 24 of the first medium flow channel 41. The heat exchange medium circulates in the first medium flow channel 41 to achieve heat exchange with the battery cell 10.

[0189] In some embodiments, see Figures 2 to 5 The battery device 100 also includes a heat exchange component 30, which is arranged on at least one side of the battery cell 10 along the height direction of the battery device 100. The heat exchange component 30 has at least one second medium flow channel 312 inside. The at least one second medium flow channel 312 is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with multiple battery cells 10.

[0190] The heat exchange component 30 is arranged on at least one side of the battery cell 10 along the height direction of the battery device 100, which means that the heat exchange component 30 can be arranged on the bottom of the battery cell 10 along the battery device 100, or on the top of the battery cell 10 along the battery device 100, or on the bottom and top of the battery cell 10 along the battery device 100.

[0191] 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 enters the second medium flow channel 312 through the inlet of the heat exchange component 30. After the heat exchange medium exchanges heat with the battery cell 10, the heat exchange medium flows out through the outlet of the heat exchange component 30, completing the heat exchange of the battery cell 10.

[0192] In this embodiment, during use of the battery device 100 , the battery cells 10 in the battery device 100 generate heat. By providing the heat exchange assembly 30 , the battery cells 10 in the battery device 100 are effectively cooled, which is beneficial to further improve the performance and service life of the battery device 100 .

[0193] In some embodiments, see Figures 4 and 5 The heat exchange component 30 includes at least two heat exchange parts, at least one heat exchange part is configured as a flexible part 31, and at least one heat exchange part is configured as a rigid part 32. The elastic modulus of at least part of the flexible part 31 is smaller than the elastic modulus of the rigid part 32. The flexible part 31 and the rigid part 32 are stacked to form at least one second medium flow channel 312.

[0194] Here, the elastic modulus of a partial area of the flexible member 31 may be smaller than the elastic modulus of the rigid member 32 , or the elastic modulus of the entire area of the flexible member 31 may be smaller than the elastic modulus of the rigid member 32 .

[0195] The heat exchange assembly 30 includes at least two heat exchange elements, that is, there are multiple heat exchange elements.

[0196] At least one heat exchange component is configured as a flexible component 31, which means that there are one or more flexible components 31. In the embodiment where multiple heat exchange components are configured as flexible components 31, the flexible components 31 may be the same or different.

[0197] At least one heat exchange component is configured as a rigid component 32, which means that there are one or more rigid components 32. In the embodiment where multiple heat exchange components are configured as rigid components 32, the rigid components 32 can be the same or different.

[0198] Exemplarily, the heat exchange assembly 30 includes two heat exchange components, one of which is a flexible component 31 and the other is a rigid component 32 .

[0199] Illustratively, the rigid member 32 is a rigid plate-shaped structure, which can support the flexible member 31 , thereby facilitating improvement of the overall structural strength and stability of the heat exchange assembly 30 .

[0200] For example, the rigid member 32 may be stamped or welded to form a specific structure as required for supporting functions.

[0201] Exemplarily, the heat exchange assembly 30 further includes an inlet and an outlet, both of which are in communication with the second medium flow channel 312 .

[0202] Here, the inlet and outlet of the heat exchange assembly 30 are used to connect to the pipelines of the air conditioning system of the vehicle or the electrical device or a liquid storage device such as a water tank.

[0203] For example, see Figures 4 and 5 The heat exchange component 30 further includes a connecting member 33 having an inlet and a connecting member 33 having an outlet, and the connecting member 33 is connected to the rigid member 32.

[0204] For example, the connecting member 33 is connected to the rigid member 32 by soldering.

[0205] Exemplarily, the connecting member 33 is a water tap.

[0206] 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 .

[0207] Here, the material of the flexible member 31 of the heat exchange assembly 30 and the material of the flexible member 31 of the heat management member 40 may be the same or different.

[0208] The material of the rigid component 32 of the heat exchange assembly 30 and the material of the rigid component 32 of the thermal management component 40 may be the same or different.

[0209] In some embodiments, see Figures 4 and 5 The flexible part 31 and the rigid part 32 are hot pressed to form a hot pressing area 311 and a first medium flow channel 41, or the flexible part 31 and the rigid part 32 are hot pressed to form a hot pressing area 311 and a second medium flow channel 312, and the flexible part 31 and the rigid part 32 are connected to each other in at least a part of the hot pressing area 311.

[0210] That is, the flexible member 31 and the rigid member 32 are connected by hot pressing, and this molding method is simple.

[0211] Here, the flexible member 31 is sealed by a hot pressing process, which can effectively ensure that the heat exchange component 30 has good sealing performance and is not prone to cracking.

[0212] In this embodiment, the flexible part 31 is sealed by a hot pressing process, that is, a hot pressing area 311 is formed by hot pressing. The hot pressing area 311 separates the thermal management part 40 to form at least one first medium flow channel 41 or separates the heat exchange component 30 to form at least one second medium flow channel 312. This molding method is simple.

[0213] Illustratively, the heat-pressing region 311 includes a heat-sealing region and a non-heat-sealing region, with the non-heat-sealing region and the first medium flow channel 41 located on either side of the heat-sealing region. Alternatively, the non-heat-sealing region and the second medium flow channel 312 are located on either side of the heat-sealing region. This helps reduce the width of the heat-sealing region, thereby alleviating the problem of excessively high temperatures resulting from an overly wide heat-sealing region, which can affect the heat-pressing quality and damage the flexible member 31. Furthermore, the non-heat-sealing region can also form a buffer zone for stress release when the flexible member 31 is folded, thereby alleviating the problem of stress concentration in the heat-sealing region leading to damage to the heat-sealing region.

[0214] In the related art, the heat exchange assembly 30 is formed by welding 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.

[0215] In the embodiment of the present application, 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 311 and a second medium flow channel 312. The hot pressing temperature (150°C ± 10°C) is lower than the brazing temperature in the related art, and the alloy elements will not precipitate, which is beneficial to further improve the structural strength of the heat exchange component 30.

[0216] In this embodiment, by setting at least one heat exchange component as a flexible component 31, the flexible component 31 is lighter, which is beneficial to reducing the mass of the heat exchange component 30, reducing the production cost of the heat exchange component 30, and reducing the mass of the battery device 100; in addition, the flexible component 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, eliminating the need for filler or thermal conductive material, 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. 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 second medium flow channel 312. The rigid component 32 can support the flexible component 31, which is beneficial to improving the overall structural strength and stability of the heat exchange component 30, and further improving the 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 support the battery cell 10, thereby improving the applicability of the heat exchange component 30.

[0217] It should be noted that the specific material of the rigid component 32 is not limited here.

[0218] In some embodiments, the rigid member 32 is configured as a metal plate.

[0219] For example, it may be an aluminum alloy.

[0220] 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.

[0221] In some embodiments, see Figure 5 The flexible structure is a layered structure, which includes a first anti-corrosion layer 313 , an isolation layer 314 and a second anti-corrosion layer 315 arranged in sequence. The first anti-corrosion layer 313 is closer to the first medium flow channel 41 than the second anti-corrosion layer 315 .

[0222] Here, the flexible part refers to the flexible structure.

[0223] Here, the second anti-corrosion layer 315 may be a nylon layer formed of nylon material, so as to have certain corrosion resistance, for example, acid and alkali corrosion resistance.

[0224] The isolation layer 314 may be a metal layer, which may be one or more of aluminum foil, copper foil, and steel foil, so as to provide the flexible structure with a certain structural strength and to play an isolating role.

[0225] The first anti-corrosion layer 313 may be a non-metallic layer, which may be made of one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene, so as to make the flexible structure waterproof to a certain extent.

[0226] In this embodiment, by setting the flexible structure to include a first anti-corrosion layer 313, an isolation layer 314 and a second anti-corrosion layer 315 arranged in sequence, the second anti-corrosion layer 315 is closer to the first medium flow channel 41 than the first anti-corrosion layer 313, which is beneficial to improving the reliability of the thermal management component 40.

[0227] In some embodiments, the isolation layer 314 has a thickness of 6.5 μm-100 μm.

[0228] The thickness of the isolation layer 314 can be any one of 6.5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 38μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm or any value therebetween.

[0229] In this embodiment, by setting the thickness of the isolation layer 314 to 6.5 μm-100 μm, the flexible structure can have a certain structural strength and flexibility.

[0230] In some embodiments, the isolation layer 314 has a thickness of 6.5 μm-15 μm.

[0231] The thickness of the isolation layer 314 can be any one of 6.5μm, 7μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.2μm, 9.5μm, 9.7μm, 10μm, 10.3μm, 10.5μm, 10.8μm, 11μm, 11.5μm, 11.8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm or any value between any two of them.

[0232] In this embodiment, by setting the thickness of the isolation layer 314 to 6.5 μm-15 μm, the flexible structure can be further endowed with certain structural strength and flexibility.

[0233] In some embodiments, the second anti-corrosion layer 315 has a thickness of 5 μm-20 μm.

[0234] The thickness of the second anti-corrosion layer 315 can be 5 μm, 5.5 μm, 5.8 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 7.8 μm, 8 μm, 8.3 μm, 8.5 μm, 8.8 μm, 9 μm, 9.2 μm, 9.5 μm, 9.7 μm, 10 μm, 10.3 μm, 10.5 μm, 10.8 μm, 11 μm, 11.5 μm, 1 Any one of the point values of 1.8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm, 15.5μm, 16μm, 16.5μm, 17μm, 17.5μm, 18μm, 18.5μm, 18.7μm, 19μm, 19.5μm, 20μm or any point value between any two of them.

[0235] In this embodiment, by setting the thickness of the second anti-corrosion layer 315 to 5 μm-20 μm, the wear resistance and toughness of the flexible structure can be improved.

[0236] In some embodiments, the thickness of the first anti-corrosion layer 313 is 50 μm-120 μm.

[0237] The thickness of the first anti-corrosion layer 313 can be any one of 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, 120μm or any value between two of them.

[0238] In this embodiment, by setting the thickness of the first anti-corrosion layer 313 to 50 μm-120 μm, the first anti-corrosion layer 313 can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible structure through the first anti-corrosion layer 313.

[0239] 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.

[0240] For example, the elastic modulus of the flexible member 31 can be measured at room temperature and pressure by nanoindentation. The nanoindentation method 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.

[0241] In the description of the present disclosure, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. mean 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 disclosure. In the present disclosure, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in the present disclosure and features of different embodiments or examples, unless they are mutually inconsistent.

[0242] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: A box body, wherein the box body has a receiving cavity inside; a plurality of battery cells, wherein the plurality of battery cells are arranged in the accommodating cavity; a thermal management component disposed on a side wall of the housing, the thermal management component being configured to heat and cool the plurality of battery cells, at least a portion of the thermal management component being configured as a flexible structure; the battery device further comprising at least one first medium flow channel, the flexible structure forming at least a portion of a side wall of the first medium flow channel; The battery device includes multiple states, and in at least one of the multiple states, the first medium flow channel is filled with a heat-insulating medium, and the thermal management component is used to insulate the battery cell; The battery device includes a fourth state and a fifth state different from the fourth state; In the fourth state, the first medium flow channel is filled with the heat insulating medium; in the fifth state, the first medium flow channel is not filled with the heat insulating medium.

2. The battery device according to claim 1, wherein: The first medium flow channel is formed inside the thermal management component; and / or, The first medium flow channel is formed between the heat management component and the side wall of the box body.

3. The battery device according to claim 1, wherein: The battery device includes a first state and a second state different from the first state; In the first state, the first medium flow channel is filled with a heat exchange medium, and the thermal management component is used to exchange heat for the battery cell; In the second state, the first medium flow channel is not filled with the heat exchange medium, and the thermal conductivity of the heat insulating medium is lower than the thermal conductivity of the heat exchange medium.

4. The battery device according to claim 1, wherein: The thermal insulation medium includes air.

5. The battery device according to any one of claims 1 to 4, characterized in that: The heat management component further includes a storage component, which is used to store the medium discharged from the first medium flow channel.

6. The battery device according to claim 1, wherein: The thermal management component includes a thermal insulation material.

7. The battery device according to any one of claims 1 to 4, characterized in that: The heat management component is arranged in the accommodating cavity, and / or the heat management component is arranged outside the accommodating cavity.

8. The battery device according to any one of claims 1 to 4, characterized in that: The flexible structure is formed on the side wall of the box body by hot pressing.

9. The battery device according to any one of claims 1 to 4, characterized in that: The flexible structure includes a metal plasticized film.

10. The battery device according to claim 9, characterized in that The flexible structure comprises an aluminum-plastic film.

11. The battery device according to any one of claims 1 to 4, characterized in that: The flexible structure is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked in sequence.

12. The battery device according to claim 11, wherein: The metal layer includes one or more of aluminum foil, copper foil and steel foil; and / or, The non-metallic layer includes one or more of polypropylene, polyvinyl chloride and polyethylene.

13. The battery device according to claim 11, wherein: The non-metallic layer is a hot-melt layer.

14. The battery device according to any one of claims 1 to 4, characterized in that: The flexible structure is a layered structure, and includes a first anti-corrosion layer, an isolation layer, and a second anti-corrosion layer arranged in sequence. The first anti-corrosion layer is closer to the first medium flow channel than the second anti-corrosion layer.

15. The battery device according to any one of claims 1 to 4, characterized in that: The thickness of the flexible structure is 0.05 mm to 0.3 mm.

16. The battery device according to claim 15, characterized in that The thickness of the flexible structure is 0.08 mm to 0.2 mm.

17. The battery device according to any one of claims 1 to 4, characterized in that: The elastic modulus of the flexible structure is 0.1 MPa-10000 MPa.

18. The battery device according to any one of claims 1 to 4, characterized in that: The thermal management component includes a flexible component and a rigid component, and the flexible component and the rigid component are located between the battery cell and the side wall of the box body.

19. The battery device according to any one of claims 1 to 4, characterized in that: The battery device also includes a heat exchange component, which is arranged on at least one side of the battery cell along the height direction of the battery device. The heat exchange component has at least one second medium flow channel inside, and the at least one second 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.

20. The battery device according to claim 19, 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. The elastic modulus of at least a portion of the flexible part is smaller than the elastic modulus of the rigid part. The flexible part and the rigid part are stacked to form the at least one second medium flow channel.

21. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 20.

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