Thermal management assembly, battery, electric device, and energy storage device

Abstract

Embodiments of the present application provide a thermal management assembly, a battery, an electric device, and an energy storage device, capable of improving the use performance of the thermal management assembly. The thermal management assembly is used for adjusting the temperature of a battery cell. The thermal management assembly comprises: a first plate and a second plate which are oppositely arranged; and a first pipe, the first pipe being arranged between the first plate and the second plate, wherein the shape of the section, perpendicular to the extending direction of the first pipe, of the first pipe comprises an arc shape.

Description

Thermal management components, batteries, power consumption equipment and energy storage equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202410043815.1, filed on January 11, 2024, entitled “Thermal management components, batteries, electrical equipment and energy storage equipment,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The embodiments of the present application relate to the field of battery technology, and in particular to a thermal management component, a battery, an electrical device, and an energy storage device. Background Art

[0004] With increasing environmental pollution, the new energy industry is attracting increasing attention. Battery technology is a crucial factor in the development of this industry. During battery operation, temperature is a key factor influencing the battery's service life and cycle performance. Excessively low temperatures can reduce the battery's charge and discharge efficiency, significantly reducing the performance of electrical equipment. Excessively high temperatures can reduce the battery's charge and discharge capacity, and in severe cases, can lead to thermal runaway.

[0005] Typically, thermal management components are used to manage battery heat and regulate its temperature. However, with the continuous advancement of battery technology, higher requirements are being placed on the performance of thermal management components. Therefore, improving the performance of thermal management components has become a pressing technical issue in this field.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a thermal management component, a battery, an electrical device, and an energy storage device, which can improve the performance of the thermal management component.

[0008] In a first aspect, a thermal management component is provided for regulating the temperature of a battery cell, the thermal management component comprising: a first plate and a second plate arranged opposite to each other; a first pipe, the first pipe being arranged between the first plate and the second plate, wherein a cross-section of the first pipe perpendicular to an extension direction of the first pipe comprises an arc shape.

[0009] In the embodiment of the present application, the first pipe is arranged between the first plate and the second plate, and the shape of the cross section of the first pipe in the extension direction is set to include an arc structure. In this way, when the battery is subjected to vibration, impact, extrusion and other working conditions, the thermal management component can absorb the force exerted by the battery cell on the thermal management component through the arc structure, so as to absorb the tolerance of the battery cell and reduce the risk of damage to the battery cell and the thermal management component, thereby improving the performance of the thermal management component and improving the performance of the battery.

[0010] In some implementations, the first pipe includes: two first connection portions that are oppositely arranged along a direction perpendicular to the thickness of the thermal management component, and the first connection portions are connected to the first plate and the second plate.

[0011] In an embodiment of the present application, the first pipe is configured to include two first connecting portions arranged opposite to each other along a thickness direction perpendicular to the thermal management component, and the first connecting portions are connected to the first plate and the second plate. In this way, when the battery is subjected to vibration, impact, extrusion, and other working conditions, the thermal management component can absorb the force exerted by the battery cells on the thermal management component through the first connecting portions, so as to absorb the tolerance of the battery cells and reduce the risk of damage to the battery cells and the thermal management component, thereby improving the performance of the thermal management component and the performance of the battery.

[0012] In some implementations, the cross-section of the first connecting portion, on a plane perpendicular to the extension direction of the first conduit, includes an arc. Thus, in embodiments of the present application, by configuring the cross-section of the first connecting portion to include an arc on a plane perpendicular to the extension direction of the first conduit, the thermal management assembly can absorb the forces exerted by the battery cells on the thermal management assembly through the arcuate structure of the first connecting portion, thereby absorbing the tolerances of the battery cells and reducing the risk of damage to the battery cells and the thermal management assembly, thereby improving the performance of the thermal management assembly and the battery.

[0013] In some implementations, the arcuate opening faces the interior of the first conduit. Thus, in the embodiments of the present application, by arranging the arcuate opening toward the interior of the first conduit, the structural strength and stability of the first conduit can be improved. Furthermore, when the battery is subjected to vibration, impact, or compression, the thermal management assembly can absorb the forces exerted on the thermal management assembly by the battery cells through the arcuate structure of the first connecting portion, thereby absorbing the tolerances of the battery cells and reducing the risk of damage to the battery cells and the thermal management assembly, thereby improving the performance of the thermal management assembly and the battery.

[0014] In some implementations, the first conduit further includes two second connecting portions disposed opposite each other along the thickness direction of the thermal management assembly, the second connecting portions being connected to the two first connecting portions. Thus, in this embodiment of the present application, the first conduit further includes two second connecting portions disposed opposite each other along the thickness direction of the thermal management assembly, the second connecting portions being connected to the two first connecting portions to form the first conduit. This can improve the structural strength and stability of the first conduit and facilitate installation and removal of the thermal management assembly.

[0015] In some embodiments, a clamping space is formed between the first plate and the second plate, and the clamping space includes a deformation space and a pipe space occupied by the first pipe. The deformation space is an open space in the clamping space that is connected to the outside of the thermal management component. The deformation space is used to absorb the force exerted by the battery cell on the thermal management component.

[0016] In an embodiment of the present application, a clamping space is formed between the first plate and the second plate in the thermal management component, and the clamping space includes a deformation space and a pipe space occupied by the first pipe. The deformation space is an open space in the clamping space that is connected to the outside of the thermal management component, and the deformation space is used to absorb the force exerted by the battery cell on the thermal management component. In this way, when the battery is subjected to vibration, impact, extrusion and other working conditions, the thermal management component can also absorb the force exerted by the battery cell on the thermal management component through the deformation space to absorb the tolerance of the battery cell and reduce the risk of damage to the battery cell and the thermal management component, thereby improving the performance of the thermal management component and improving the performance of the battery.

[0017] In some implementations, the first pipe is provided with a plurality of bends along an extension direction of the first pipe, the plurality of bends including a first bend and a second bend, and a bending direction of the first bend is opposite to a bending direction of the second bend.

[0018] In an embodiment of the present application, the first pipe is provided with a plurality of bends along the extension direction of the first pipe, the plurality of bends including a first bend and a second bend, and the bending direction of the first bend is opposite to the bending direction of the second bend, which can improve the flow performance of the fluid in the first pipe and improve the stress distribution inside the first pipe. At the same time, compared with a straight pipe, the effective length of the first pipe can be increased, and the heat exchange efficiency of the thermal management component and the space utilization of the thermal management component can be improved.

[0019] In some implementations, on a first plane perpendicular to the extension direction of the first pipe, the first plane intersects the thermal management component, the first pipe includes multiple first sections on the first plane, and the ratio of the distance L1 between any two adjacent first sections to the dimension L2 of the first pipe in the length direction perpendicular to the thermal management component satisfies: 0.1≤L1 / L2≤0.4.

[0020] In the embodiment of the present application, by setting the ratio of the distance L1 between any two adjacent first cross sections and the dimension L2 of the first pipe in the length direction perpendicular to the thermal management component to 0.1≤L1 / L2≤0.4, the circulation performance of the fluid in the first pipe of the thermal management component and the bending performance of the first pipe can be taken into account. That is, the thermal management component can effectively absorb the tolerance generated by the battery cell while regulating the temperature of the battery cell, thereby improving the performance of the thermal management component.

[0021] In some implementations, on a first plane perpendicular to the extension direction of the first pipe, the first plane intersects the thermal management component, the first pipe includes multiple first sections on the first plane, and the ratio of the distance L1 between any two adjacent first sections to the dimension L2 of the first pipe in the length direction perpendicular to the thermal management component satisfies: 0.15≤L1 / L2≤0.27.

[0022] In the embodiment of the present application, by setting the ratio of the distance L1 between any two adjacent first cross sections to the dimension L2 of the first pipe in the length direction perpendicular to the thermal management component to: 0.15≤L1 / L2≤0.27, the circulation performance of the fluid in the first pipe of the thermal management component and the bending performance of the first pipe can be effectively taken into account. That is, the thermal management component can effectively absorb the tolerance generated by the battery cell while regulating the temperature of the battery cell, further improving the performance of the thermal management component.

[0023] In some implementations, along the thickness direction of the thermal management assembly, a ratio of a maximum inner dimension h1 of the first pipe to a distance h2 between the first plate and the second plate satisfies: 0.2≤h1 / h2≤1.

[0024] In the embodiment of the present application, by setting the ratio of the maximum internal dimension h1 of the first pipe to the distance h2 between the first plate and the second plate along the thickness direction of the thermal management assembly to: 0.2≤h1 / h2≤1, the circulation performance of the fluid in the first pipe of the thermal management assembly and the structural strength of the thermal management assembly can be taken into account. That is, the thermal management assembly can absorb the tolerance generated by the battery cell while regulating the temperature of the battery cell, thereby improving the performance of the thermal management assembly.

[0025] In some implementations, along the thickness direction of the thermal management assembly, the ratio of the maximum internal dimension h1 of the first conduit to the distance h2 between the first plate and the second plate satisfies the following: 0.7 ≤ h1 / h2 ≤ 0.88. Thus, in this embodiment of the present application, by setting the ratio of the maximum internal dimension h1 of the first conduit to the distance h2 between the first plate and the second plate along the thickness direction of the thermal management assembly to the following: 0.7 ≤ h1 / h2 ≤ 0.88, the circulation performance of the fluid within the first conduit of the thermal management assembly and the structural strength of the thermal management assembly can be effectively balanced. Specifically, the thermal management assembly can effectively absorb the tolerances generated by the battery cells while regulating their temperature, further improving the performance of the thermal management assembly.

[0026] In some implementations, the first plate and / or the second plate are adhesively connected to the first pipe. Thus, in embodiments of the present application, by adhesively connecting the first plate and / or the second plate to the first pipe, when negative pressure is formed inside the first pipe, the adhesive connection between the first pipe and the first plate and / or the second plate can effectively reduce the concave deformation of the first pipe, thereby improving the stability and uniformity of the fluid in the first pipe and enhancing the structural strength of the first pipe. Specifically, the thermal management assembly can effectively absorb the tolerances generated by the battery cells while regulating the temperature of the battery cells, thereby improving the performance of the thermal management assembly.

[0027] In some implementations, the interior of the first conduit is used to contain a fluid to regulate the temperature of the battery cell. Thus, in the embodiments of the present application, by containing a fluid within the first conduit to regulate the temperature of the battery cell, the risk of thermal runaway of the battery cell is reduced, thereby improving the performance of the battery.

[0028] In some implementations, the material of the first conduit includes at least one of the following materials: polyphenylene sulfide, polypropylene, polylaurolactam, polyhexamethylene adipamide, and nylon. Thus, in the embodiments of the present application, by setting the material of the first conduit to at least one of the following materials: polyphenylene sulfide, polypropylene, polylaurolactam, polyhexamethylene adipamide, and nylon, the bending performance of the first conduit can be improved. Furthermore, when the battery is subjected to vibration, impact, extrusion, and other working conditions, the first conduit can undergo elastic deformation and return to its initial state after the external force is removed. In other words, the first conduit can absorb the force exerted by the battery cells on the thermal management assembly, thereby reducing damage to the battery cells. In other words, the thermal management assembly can effectively absorb the tolerances generated by the battery cells while regulating their temperature, thereby improving the performance of the thermal management assembly and the battery.

[0029] In a second aspect, a battery is provided, comprising a battery cell and a thermal management component as described in any implementation of the first aspect, wherein the thermal management component is used to regulate the temperature of the battery cell.

[0030] In some implementations, there are multiple thermal management components, and the multiple thermal management components are arranged at intervals, and the battery cell is arranged between any two adjacent thermal management components.

[0031] In some implementations, the battery cell is adhesively connected to the thermal management component.

[0032] In a third aspect, an electric device is provided, comprising the battery described in any one of the implementations of the second aspect, wherein the battery is used to provide electric energy to the electric device.

[0033] In some implementations, the electrical device may be a vehicle, a ship, or a spacecraft.

[0034] In a fourth aspect, an energy storage device is provided, comprising the battery described in any one of the implementations of the second aspect, wherein the battery is used to store electrical energy for the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0036] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application.

[0037] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application.

[0038] FIG3 is a schematic structural diagram of a battery cell provided in one embodiment of the present application.

[0039] FIG4 is a schematic structural diagram of a thermal management component provided in an embodiment of the present application.

[0040] FIG5 is a cross-sectional schematic diagram of a thermal management component provided by another embodiment of the present application.

[0041] FIG6 is a cross-sectional schematic diagram of a thermal management component provided in another embodiment of the present application.

[0042] FIG7 is a cross-sectional schematic diagram of a thermal management component provided by another embodiment of the present application.

[0043] FIG8 is a cross-sectional schematic diagram of a thermal management component provided in another embodiment of the present application.

[0044] FIG9 is a partial cross-sectional schematic diagram of a thermal management assembly provided in another embodiment of the present application.

[0045] FIG10 is a schematic structural diagram of a battery provided in another embodiment of the present application.

[0046] Explanation of the reference numerals: 1-vehicle; 10-battery; 20-battery cell; 30-controller; 40-motor; 11-casing; 21-housing; 22-electrode assembly; 211-shell; 212-cover; 213-pressure relief mechanism; 221a-first pole lug; 222a-second pole lug; 214-electrode terminal; 214a-positive electrode terminal; 214b-negative electrode terminal; 50-thermal management component; 510-first plate; 520-second plate; 530-first pipe; 531-first connecting portion; 532-second connecting portion; 511-first limiting portion; 521-second limiting portion; 541-first joint; 542-second joint; 610-clamping space; 611-pipe space; 612-deformation space.

[0047] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0048] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of the embodiments of the present application, but are not intended to limit the scope of the embodiments of the present application. That is, the embodiments of the present application are not limited to the described embodiments.

[0049] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meanings as those commonly understood by technicians in the technical fields of the embodiments of the present application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application; the terms "including" and "having" in the description and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of this application, the technical terms "first," "second," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0051] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0052] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0053] It should be understood that in the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships 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 and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0056] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0057] The battery in the embodiments of this application refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing can reduce the effects of liquids or other foreign matter on the charging or discharging of the battery cells.

[0058] It should be understood that the battery cells in the embodiments of the present application include but are not limited to 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.

[0059] In some implementations, the battery cell in the embodiments of the present application may be a metal battery. Specifically, the metal battery may include a lithium metal secondary battery, a sodium metal battery, or a magnesium metal battery.

[0060] In some implementations, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0061] In some implementations, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0062] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0063] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0064] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. In some implementations, other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4, also referred to as LFP), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0065] As an example, the positive electrode active material may include at least one of a sodium transition metal oxide, a polyanionic compound, and a Prussian blue-based compound:

[0066] In some implementations, the sodium transition metal oxide may be a sodium transition metal oxide that has been doped and modified, and the doping modification of the sodium transition metal oxide may include at least one of sodium site doping modification, oxygen site doping modification, transition metal site doping modification, and surface coating modification.

[0067] In some implementations, a metal foam may be used as the positive electrode. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, among others. When the metal foam is used as the positive electrode, the surface of the metal foam may or may not be provided with a positive electrode active material. For example, a lithium source material, potassium metal, or sodium metal may be filled and / or deposited within the metal foam, where the lithium source material is lithium metal and / or a lithium-rich material.

[0068] In some implementations, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0069] As an example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, etc. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0070] In some implementations, the battery cell in the embodiments of the present application may be a negative electrode-free sodium secondary battery.

[0071] A negative electrode-free sodium secondary battery refers to a battery cell that does not actively set a negative electrode active material layer on the negative electrode side during the manufacturing process of the battery cell. For example, during the manufacturing process of the battery cell, a sodium metal or carbonaceous active material layer is not set at the negative electrode through processes such as coating or deposition to form a negative electrode active material layer. During the first charge, sodium ions gain electrons on the anode side and deposit on the surface of the current collector to form a sodium metal phase. During discharge, metallic sodium can be converted into sodium ions and return to the positive electrode, realizing cyclic charge and discharge. Compared with other sodium secondary batteries, negative electrode-free sodium secondary battery cells can achieve higher energy density due to the lack of a negative electrode active material layer.

[0072] In some implementations, in order to improve the performance of battery cells, some functional coatings, such as carbonaceous materials, metal oxides, alloys, etc., can be provided on the negative electrode side of the negative electrode-free sodium secondary battery to improve the conductivity of the negative electrode current collector and improve the uniformity of the deposited sodium metal.

[0073] In some implementations, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0074] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0075] In some implementations, the separator is a separator. The present invention has no particular restrictions on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be used.

[0076] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0077] In some implementations, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to both transport ions and isolate the positive and negative electrodes.

[0078] In some implementations, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0079] In some implementations, the electrode assembly may be a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0080] In some implementations, the electrode assembly is a laminated structure. As an example, multiple positive and negative electrodes may be provided, and the multiple positive and negative electrodes may be alternately stacked.

[0081] 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.

[0082] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0083] 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.

[0084] 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.

[0085] In some implementations, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0086] In some implementations, 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.

[0087] In some implementations, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0088] As an example, the battery cells may be cylindrical, prismatic, soft-pack or other shaped battery cells. Prismatic battery cells include square-shell, blade-shaped, and polygonal batteries. Polygonal batteries may be, for example, hexagonal batteries.

[0089] In order to meet different power requirements, the battery in the embodiment of the present application may include multiple battery cells, wherein the multiple battery cells can be connected in series, in parallel, or in hybrid connection, and hybrid connection refers to a mixture of series and parallel connection. Optionally, multiple battery cells can first be connected in series, in parallel, or in hybrid connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in hybrid connection to form a battery. In other words, multiple battery cells can directly form a battery, or they can first form a battery module, and the battery module can then form a battery. The battery is further arranged in an electrical device to provide electrical energy to the electrical device.

[0090] With increasing environmental pollution, the new energy industry is attracting increasing attention. Battery technology is a crucial factor in the development of this industry. Temperature significantly impacts battery performance. For example, during vehicle charging and driving, batteries generate significant heat. This accumulated heat can lead to varying degrees of reduction in battery capacity and lifespan. If the accumulated heat is not dissipated promptly, it can cause thermal runaway, resulting in severe combustion and explosion, posing a serious threat to consumer life and property. To address this issue, thermal management components can be used to manage battery thermal conditions and regulate battery temperature.

[0091] Current thermal management assemblies typically employ a harmonica tubeplate design, with multiple cooling channels extending along the length of the tubeplate and arranged parallel to the width of the tubeplate for the flow of coolant. This current design features straight, square cooling channels within the tubeplate, making it difficult to compress and deform during actual use, making it difficult to accommodate battery pack tolerances. This poses a significant risk of damage to the thermal management assembly or the battery when subjected to vibration, impact, or compression. Therefore, improving the performance of thermal management assemblies for batteries has become a pressing technical challenge in the field.

[0092] In view of this, an embodiment of the present application provides a thermal management assembly for regulating the temperature of a battery cell. The thermal management assembly includes: a first plate and a second plate disposed opposite each other; and a first pipe disposed between the first plate and the second plate, wherein the cross-section of the first pipe perpendicular to its extension direction includes an arc. Thus, by disposing the first pipe between the first plate and the second plate, and configuring the cross-section of the first pipe in its extension direction to include an arc-shaped structure, when the battery is subjected to vibration, impact, extrusion, or other operating conditions, the thermal management assembly can absorb the forces exerted on the thermal management assembly by the battery cell through the arc-shaped structure, thereby absorbing the tolerances of the battery cell and reducing the risk of damage to the battery cell and the thermal management assembly, thereby improving the performance of the thermal management assembly and the battery.

[0093] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be fuel-powered vehicles, gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include aircraft, 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. Power tools include metal cutting tools, grinding tools, assembly tools, and railway tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0094] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical equipment described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments are described in detail using the electrical equipment as a vehicle as an example.

[0095] For example, as shown in FIG1 , it is a structural schematic diagram of a vehicle 1 provided in an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 may be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to supply power to the motor 40. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1. In another implementation of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0096] In order to meet different power usage requirements, the battery 10 in the embodiment of the present application can be a battery cell group or a battery pack. The battery 10 may include at least one battery cell group, and the battery cell group includes a plurality of battery cells, wherein the plurality of battery cells can be electrically connected in series, in parallel, or in mixed connection to form a battery 10, wherein mixed connection refers to a mixture of series and parallel connection. The battery 10 can also be referred to as a battery pack. For example, a plurality of battery cells can first be connected in series, in parallel, or in mixed connection to form a battery module, and a plurality of battery modules can then be connected in series, in parallel, or in mixed connection to form a battery 10. In other words, a plurality of battery cells can directly form a battery 10, or they can first be formed into a battery module, and then the battery modules can be formed into a battery 10.

[0097] In some implementations, the battery 10 may include multiple battery cells. For example, FIG2 is a schematic diagram of the structure of a battery 10 according to one embodiment of the present application. The battery 10 may include multiple battery cells 20. The battery 10 may also include a housing 11 having a hollow interior and housing the multiple battery cells 20. For example, the multiple battery cells 20 may be connected in parallel, in series, or in a mixed combination and then placed in the housing 11.

[0098] In some implementations, the battery 10 may further include other structures, which will not be described in detail here. For example, the battery 10 may further include a busbar component, which is used to achieve electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can achieve electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0099] In the embodiment of the present application, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel or hybrid to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to demand. The battery 10 may include multiple battery modules, which can be connected in series, parallel or hybrid.

[0100] As shown in FIG3 , it is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 includes one or more electrode assemblies 22, a shell 211 and a cover plate 212. The shell 211 and the cover plate 212 form an outer shell 21 or a battery box. The walls of the shell 211 and the cover plate 212 are both referred to as the walls of the battery cell 20. For a rectangular battery cell 20, the walls of the shell 211 include a bottom wall and four side walls. The shell 211 is determined according to the shape of the one or more electrode assemblies 22 after combination. For example, the shell 211 can be a hollow cuboid, a cube or a cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow cuboid or a cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall, so that the inside and outside of the shell 211 are connected. When the housing 211 is a hollow cylinder, the end surface of the housing 211 is an open surface, that is, the end surface has no wall, so that the inside and outside of the housing 211 are connected. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for accommodating the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0101] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member, also known as a current collecting member, located between the cover plate 212 and the electrode assembly 22 to electrically connect the electrode assembly 22 to the electrode terminals 214.

[0102] As shown in FIG3 , each electrode assembly 22 has a first electrode tab 221 a and a second electrode tab 222 a. The polarities of the first electrode tab 221 a and the second electrode tab 222 a are opposite. For example, when the first electrode tab 221 a is a positive electrode tab, the second electrode tab 222 a is a negative electrode tab.

[0103] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG3 , two independent electrode assemblies 22 are provided in the battery cell 20 .

[0104] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0105] The pressure relief mechanism 213 may have various possible pressure relief structures. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold; and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold.

[0106] FIG4 is a schematic diagram of the structure of a thermal management component 50 provided in one embodiment of the present application. FIG5 is a schematic diagram of a cross-section of a thermal management component 50 provided in another embodiment of the present application. FIG6 is a schematic diagram of a cross-section of a thermal management component 50 provided in another embodiment of the present application. FIG7 is a schematic diagram of a cross-section of a thermal management component 50 provided in another embodiment of the present application. FIG8 is a schematic diagram of a cross-section of a thermal management component 50 provided in yet another embodiment of the present application. FIG9 is a schematic diagram of a partial cross-section of a thermal management component 50 provided in another embodiment of the present application.

[0107] It should be understood that in the embodiments of the present application, for ease of description, as shown in Figures 4 to 9, direction Z may be the thickness direction or height direction of the thermal management component 50, or, the direction Z may be perpendicular to the plane where the first plate 510 or the second plate 520 is located, or, the direction Z may also be the thickness direction of the first pipeline 530, and the direction Z is perpendicular to the direction X and the direction Y; the direction X may be the length direction of the thermal management component 50, and the direction X is perpendicular to the direction Z and the direction Y; the direction Y may be the width direction of the thermal management component 50, and the direction Y is perpendicular to the direction Z and the direction X.

[0108] In some implementations, as shown in Figures 4 to 9, the thermal management component 50 is used to regulate the temperature of the battery cell 20. The thermal management component 50 includes: a first plate 510, a second plate 520, and a first pipe 530. The first plate 510 and the second plate 520 are arranged opposite to each other, and the first pipe 530 is arranged between the first plate 510 and the second plate 520. The shape of the cross section of the first pipe 530 perpendicular to the extension direction of the first pipe 530 includes an arc.

[0109] It should be understood that in the embodiment of the present application, the thermal management component 50 is used to regulate the temperature of the battery cell 20, which means that the thermal management component 50 can be used to cool or heat the battery cell 20 to make the temperature of the battery 10 relatively stable, thereby improving the working efficiency of the battery 10.

[0110] It should also be understood that the shapes of the first plate 510 and the second plate 520 in the embodiment of the present application can be set according to actual needs. For example, the shapes of the first plate 510 and the second plate 520 along the thickness direction perpendicular to the thermal management component 50 include but are not limited to rectangles, polygons, and circles.

[0111] It should also be understood that the first pipe 530 is used to communicate with an external cooling system, which can deliver coolant into the first pipe 530 to regulate the temperature of the battery cell 20. In some implementations, as shown in Figures 5 and 6, a first connector 541 is provided at one end of the first pipe 530, and a second connector 542 is provided at the other end of the first pipe 530. The first connector 541 and one end of the first pipe 530 can be fixedly connected by welding or bonding, and the second connector 542 and the other end of the first pipe 530 can be fixedly connected by welding or bonding. The first connector 541 and the second connector 542 are both connected to the external circulation system. For example, when the first connector 541 is configured as the liquid inlet of the first pipe 530, the second connector 542 can be the liquid outlet of the first pipe 530.

[0112] It should also be understood that in the embodiment of the present application, a first limiting portion 511 is provided at each end of the first plate 510 of the thermal management component 50 along the length direction of the thermal management component 50, and a second limiting portion 521 is provided at each end of the second plate 520 of the thermal management component 50 along the length direction of the thermal management component 50, and in the thickness direction of the thermal management component 50, the projections of the first limiting portion 511 and the second limiting portion 521 located at the same end of the thermal management component 50 along the length direction of the thermal management component 50 on a plane perpendicular to the thickness direction of the thermal management component 50 overlap with each other. Specifically, the first limiting portion 511 and the second limiting portion 522 are used to connect with the above-mentioned first joint 541 or the second joint 542 to play a limiting role in the first joint 541 or the second joint 542. For example, the first limiting portion 511 and the second limiting portion 521 may be recessed portions as shown in FIG4 , and the recessed portions are used to accommodate a portion of the first connector 541 or a portion of the second connector 542. It should also be understood that in the embodiment of the present application, the shape of the recessed portion in a direction perpendicular to the thickness of the thermal management component 50 may be set according to actual needs. For example, the shape of the recessed portion in a direction perpendicular to the thickness of the thermal management component 50 may be arc-shaped, semicircular, or polygonal.

[0113] It should also be understood that in the embodiment of the present application, the shape of the cross section of the first pipe 530 perpendicular to the extension direction of the first pipe 530 may include: a circle, an ellipse or a rounded rectangle.

[0114] It should also be understood that in the embodiments of the present application, the interior of the first conduit 530 can be used to contain a fluid or solid-liquid phase change material to regulate the temperature of the battery cell 20. The fluid can be a liquid or a gas. The solid-liquid phase change material is originally solid and can become a liquid after absorbing heat. Regulating the temperature refers to heating or cooling the battery cell 20. When cooling or lowering the temperature of the battery cell 20, the thermal management assembly 50 is used to contain a cooling fluid or solid-liquid phase change material to lower the temperature of the battery cell 20. In this case, the thermal management assembly 50 can also be referred to as a cooling component, cooling system, or cooling plate, and the fluid it contains can also be referred to as a cooling medium or cooling fluid, more specifically, a coolant or cooling gas. Furthermore, the thermal management assembly 50 in the embodiments of the present application can also be used to heat the battery cell 20. Optionally, the fluid in the embodiments of the present application can be circulated to achieve a better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air.

[0115] In the embodiment of the present application, the first pipe 530 is disposed between the first plate 510 and the second plate 520, and the shape of the cross section of the first pipe 530 in the extension direction is configured to include an arc structure. Thus, when the battery 10 is subjected to vibration, impact, extrusion, and other working conditions, the thermal management assembly 50 can absorb the force exerted by the battery cells 20 on the thermal management assembly 50 through the arc structure, thereby absorbing the tolerance of the battery cells 20 and reducing the risk of damage to the battery cells 20 and the thermal management assembly 50, thereby improving the performance of the thermal management assembly 50 and the performance of the battery 10.

[0116] In some implementations, as shown in FIG7 , the first conduit 530 includes two first connecting portions 531 disposed opposite each other in a direction perpendicular to the thickness of the thermal management assembly 50 , the first connecting portions 531 being connected to the first plate 510 and the second plate 520. For example, in the embodiment of the present application, the first conduit 530 may be formed by the two first connecting portions 531 enclosed by the first plate 510 and the second plate 520.

[0117] In the embodiment of the present application, the first pipe 530 is configured to include two first connecting portions 531 arranged opposite to each other along a thickness direction perpendicular to the thermal management component 50, and the first connecting portions 531 are connected to the first plate 510 and the second plate 520. In this way, when the battery 10 is subjected to vibration, impact, extrusion, etc., the thermal management component 50 can absorb the force exerted by the battery cell 20 on the thermal management component 50 through the first connecting portions 531, thereby absorbing the tolerance of the battery cell 20 and reducing the risk of damage to the battery cell 20 and the thermal management component 50, thereby improving the performance of the thermal management component 50 and the performance of the battery 10.

[0118] In some implementations, the cross-section of the first connecting portion 531 on a plane perpendicular to the extension direction of the first pipe 530 includes an arcuate shape. For example, as shown in FIG7 , the cross-section of the first connecting portion 531 on a plane perpendicular to the extension direction of the first pipe 530 is an arcuate shape, for example, a semicircular shape. In other implementations, the cross-section of the first connecting portion 531 on a plane perpendicular to the extension direction of the first pipe 530 partially has an arcuate shape, for example, the portion of the first connecting portion 531 adjacent to the first plate 510 or the second plate 520 is configured to be arcuate.

[0119] In the embodiment of the present application, on a plane perpendicular to the extension direction of the first pipe 530, the cross-sectional shape of the first connecting portion 531 is set to include an arc, so that the thermal management assembly 50 can absorb the force exerted by the battery cell 20 on the thermal management assembly 50 through the arc structure of the first connecting portion 531, thereby absorbing the tolerance of the battery cell 20 and reducing the risk of damage to the battery cell 20 and the thermal management assembly 50, thereby improving the performance of the thermal management assembly 50 and improving the performance of the battery 10.

[0120] In some implementations, as shown in FIG7 , the arc-shaped opening faces the interior of the first pipe 530. Thus, in the embodiment of the present application, by setting the arc-shaped opening to face the interior of the first pipe 530, the structural strength and stability of the first pipe 530 can be improved. Furthermore, when the battery 10 is subjected to vibration, impact, extrusion, and other working conditions, the thermal management assembly 50 can absorb the force exerted by the battery cells 20 on the thermal management assembly 50 through the arc-shaped structure of the first connecting portion 531, thereby absorbing the tolerances of the battery cells 20 and reducing the risk of damage to the battery cells 20 and the thermal management assembly 50, thereby improving the performance of the thermal management assembly 50 and the performance of the battery 10.

[0121] In some implementations, as shown in FIG8 , the first conduit 530 further includes two second connection portions 532 disposed opposite each other along the thickness direction of the thermal management assembly 50 , the second connection portions 532 being connected to the two first connection portions 531. For example, the two second connection portions 532 and the two first connection portions 531 may enclose and form the first conduit 530.

[0122] It should be understood that in the embodiment of the present application, the two second connection parts 532 include a second upper connection part close to the first plate 510 and a second lower connection part close to the second plate 520, at least a portion of the second upper connection part can be attached and connected to the first plate 510, and at least a portion of the second lower connection part can be attached and connected to the second plate 520.

[0123] In the embodiment of the present application, the first pipe 530 also includes two second connection parts 532 arranged opposite to each other along the thickness direction of the thermal management component 50, and the second connection parts 532 are connected to the two first connection parts 531 to form the first pipe 530, which can improve the structural strength and stability of the first pipe 530 and facilitate the installation and disassembly of the thermal management component 50.

[0124] In some implementations, as shown in Figures 7 and 8, a clamping space 610 is formed between the first plate 510 and the second plate 520. The clamping space 610 includes a deformation space 612 and a pipe space 611 occupied by the first pipe 530. The deformation space 612 is an open space in the clamping space 610 that is connected to the outside of the thermal management component 50. The deformation space 612 is used to absorb the force exerted by the battery cell 20 on the thermal management component 50.

[0125] It should be understood that in the embodiment of the present application, the pipe space 611 occupied by the first pipe 530 in the clamped space 610 can be a closed space.

[0126] It should also be understood that in the embodiment of the present application, the deformation space 612 is a space provided between the first plate 510 and the second plate 520 and excluding the pipe space 611 occupied by the first pipe 530. The deformation space 612 can be a semi-open space, or the deformation space 612 can also be a fully open space. When the battery 10 is subjected to vibration, impact, extrusion and other working conditions, that is, the battery cell 20 will generate a force on the first plate 510 or the second plate 520, the deformation space 612 can absorb the force of the battery cell 20 on the thermal management component 50 through deformation, that is, it can absorb the tolerance of the battery cell 20 to reduce damage to the battery cell 20 and the thermal management component 50, and after the force of the battery cell 20 on the first plate 510 or the second plate 520 is removed, the deformation space 612 can return to its initial state.

[0127] In the embodiment of the present application, a clamping space 610 is formed between the first plate 510 and the second plate 520 in the thermal management assembly 50. The clamping space 610 includes a deformation space 612 and a pipe space 611 occupied by the first pipe 530. The deformation space 612 is an open space in the clamping space 610 that is connected to the outside of the thermal management assembly 50, and the deformation space 612 is used to absorb the force exerted by the battery cell 20 on the thermal management assembly 50. In this way, when the battery 10 is subjected to vibration, impact, extrusion, etc., the thermal management assembly 50 can also absorb the force exerted by the battery cell 20 on the thermal management assembly 50 through the deformation space 612, so as to absorb the tolerance of the battery cell 20 and reduce the risk of damage to the battery cell 20 and the thermal management assembly 50, thereby improving the performance of the thermal management assembly 50 and the performance of the battery 10.

[0128] In some implementations, the first pipe 530 is provided with a plurality of bends along the extension direction of the first pipe 530 , and the plurality of bends include a first bend and a second bend, and the bending direction of the first bend is opposite to the bending direction of the second bend.

[0129] In an embodiment of the present application, the first pipe 530 is provided with a plurality of bends along the extension direction of the first pipe 530, and the plurality of bends include a first bend and a second bend, and the bending direction of the first bend is opposite to the bending direction of the second bend, which can improve the flow performance of the fluid in the first pipe 530 and improve the stress distribution inside the first pipe 530. At the same time, compared with a straight pipe, the effective length of the first pipe 530 can be increased to improve the heat exchange efficiency of the thermal management component 50 and the space utilization of the thermal management component 50.

[0130] In some implementations, as shown in Figures 7 to 9, on a first plane perpendicular to the extension direction of the first pipe 530, the first plane intersects with the thermal management component 50, and the first pipe 530 includes multiple first sections on the first plane. The ratio of the distance L1 between any two adjacent first sections to the dimension L2 of the first pipe 530 in the length direction perpendicular to the thermal management component 50 satisfies: 0.1≤L1 / L2≤0.4.

[0131] It should be understood that in the embodiment of the present application, if the distance L1 between any two adjacent first sections is smaller than the dimension L2 of the first pipe 530 in the direction perpendicular to the length of the thermal management component 50, the inner side of the bent portion of the first pipe 530 is subjected to greater force during the bending process of the first pipe 530, and the stress distribution is concentrated, so that the first pipe 530 is at risk of cracking, reducing the bending performance of the first pipe 530, and affecting the performance of the thermal management component 50. If the distance L1 between any two adjacent first sections is larger than the dimension L2 of the first pipe 530 in the direction perpendicular to the length of the thermal management component 50, the dimension of the first section along the first direction is smaller, that is, the space that can accommodate the fluid in the first pipe 530 is smaller, which reduces the heat exchange effect of the thermal management component 50 and affects the performance of the thermal management component 50.

[0132] It should also be understood that the distance L1 between any two adjacent first sections in the embodiment of the present application refers to the maximum distance, minimum distance or average distance between the mutually adjacent side walls of the two adjacent first sections in the length direction perpendicular to the thermal management component 50.

[0133] Illustratively, the ratio of the distance L1 between any two adjacent first cross sections in the embodiment of the present application to the dimension L2 of the first pipe 530 in the length direction perpendicular to the thermal management component 50 may be: 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.190.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, or its value is within the range obtained by combining any two of the above values.

[0134] In the embodiment of the present application, by setting the ratio of the distance L1 between any two adjacent first cross sections and the dimension L2 of the first pipe 530 in the length direction perpendicular to the thermal management component 50 to 0.1≤L1 / L2≤0.4, the circulation performance of the fluid in the first pipe 530 in the thermal management component 50 and the bending performance of the first pipe 530 can be taken into account, thereby improving the performance of the thermal management component 50.

[0135] In some implementations, as shown in Figures 7 to 9 , on a first plane perpendicular to the extension direction of the first conduit 530, the first plane intersects the thermal management assembly 50. The first conduit 530 includes multiple first cross-sections on the first plane, and the ratio of the distance L1 between any two adjacent first cross-sections to the dimension L2 of the first conduit 530 in the direction perpendicular to the length of the thermal management assembly 50 satisfies the following: 0.15 ≤ L1 / L2 ≤ 0.27. Thus, in this embodiment of the present application, by setting the ratio of the distance L1 between any two adjacent first cross-sections to the dimension L2 of the first conduit 530 in the direction perpendicular to the length of the thermal management assembly 50 to the following: 0.15 ≤ L1 / L2 ≤ 0.27, the circulation performance of the fluid in the first conduit 530 and the bending performance of the first conduit 530 in the thermal management assembly 50 can be effectively balanced. In other words, the thermal management assembly 50 can effectively accommodate the tolerances of the battery cells 20 while regulating their temperature, further improving the performance of the thermal management assembly 50.

[0136] In some implementations, as shown in FIG. 7 , along the thickness direction of the thermal management assembly 50 , the ratio of the maximum internal dimension h1 of the first pipe 530 to the distance h2 between the first plate 510 and the second plate 520 satisfies: 0.2≤h1 / h2≤1.

[0137] It should be understood that in the embodiment of the present application, if the maximum internal dimension h1 of the first pipe 530 along the thickness direction of the thermal management assembly 50 is smaller than the distance h2 between the first plate 510 and the second plate 520, the first pipe 530 may be able to accommodate less cooling fluid or solid-liquid phase change material, thereby affecting the circulation performance of the fluid in the first pipe 530 and reducing the performance of the thermal management assembly 50. At the same time, the first plate 510 and / or the second plate 520 may be thicker, resulting in higher structural strength of the first plate 510 and / or the second plate 520. When the battery 10 is subjected to vibration, impact, extrusion, etc., the first plate 510 and / or the second plate 520 are less likely to deform, making it difficult for the thermal management assembly 50 to absorb the force exerted by the battery 10 on the thermal management assembly 50, that is, it is difficult to absorb the tolerance of the battery cell 20, which may easily cause damage to the battery cell 20 and the thermal management assembly 50. Along the thickness direction of the thermal management component 50, if the maximum internal dimension h1 of the first pipe 530 is larger than the thickness h2 of the thermal management component 50, so that the thickness of the first plate 510 and / or the second plate 520 is thinner, the structural strength of the first plate 510 and / or the second plate 520 is weaker. When the battery 10 is subjected to vibration, impact, extrusion, etc., the first plate 510 and / or the second plate 520 is easily damaged, thereby reducing the performance of the thermal management component 50.

[0138] It should also be understood that in some implementations, when the shape of the cross-section of the first pipe 530 perpendicular to the extension direction of the first pipe 530 is a circle, along the thickness direction of the thermal management component 50, the maximum internal dimension h1 of the first pipe 530 is the diameter of the circle, or when the shape of the cross-section of the first pipe 530 perpendicular to the extension direction of the first pipe 530 is an ellipse, along the thickness direction of the thermal management component 50, the maximum internal dimension h1 of the first pipe 530 is the length of the short axis of the ellipse.

[0139] It should also be understood that in the embodiment of the present application, the distance h2 between the first plate 510 and the second plate 520 may refer to the maximum distance, minimum distance or average distance between the surface of the first plate 510 close to the second plate 520 and the surface of the second plate 520 close to the first plate 510.

[0140] Illustratively, along the thickness direction of the thermal management component 50, the ratio of the maximum internal dimension h1 of the first pipe 530 to the distance h2 between the first plate 510 and the second plate 520 may be: 0.2, 0.22, 0.24, 0.26, 0.28, 0.3, 0.36, 0.4, 0.46, 0.5, 0.56, 0.6, 0.66, 0.7, 0.76, 0.8, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96, 0.98, 1, or its value is within the range obtained by combining any two of the above values.

[0141] In the embodiment of the present application, along the thickness direction of the thermal management component 50, by setting the ratio of the maximum internal dimension h1 of the first pipe 530 to the distance h2 between the first plate 510 and the second plate 520 to: 0.2≤h1 / h2≤1, the circulation performance of the fluid in the first pipe 530 of the thermal management component 50 and the structural strength of the thermal management component 50 can be taken into account. That is, the thermal management component 50 can absorb the tolerance generated by the battery cell 20 while adjusting the temperature of the battery cell 20, thereby improving the performance of the thermal management component 50.

[0142] In some implementations, along the thickness direction of the thermal management assembly 50, the ratio of the maximum internal dimension h1 of the first conduit 530 to the distance h2 between the first plate 510 and the second plate 520 satisfies the following: 0.7≤h1 / h2≤0.88. Thus, in this embodiment of the present application, by setting the ratio of the maximum internal dimension h1 of the first conduit 530 to the distance h2 between the first plate 510 and the second plate 520 along the thickness direction of the thermal management assembly 50 to the following: 0.7≤h1 / h2≤0.88, the circulation performance of the fluid within the first conduit 530 of the thermal management assembly 50 and the structural strength of the thermal management assembly 50 can be effectively balanced. In other words, the thermal management assembly 50 can effectively absorb the tolerances generated by the battery cells 20 while regulating the temperature of the battery cells 20, further improving the performance of the thermal management assembly 50.

[0143] In some implementations, the first plate 510 and / or the second plate 520 are bonded to the first pipe 530. For example, the first plate 510 and / or the second plate 520 and the first pipe 530 may be bonded together using a thermally conductive structural adhesive to improve the heat conduction efficiency of the thermal management assembly 50.

[0144] In the embodiment of the present application, by bonding the first plate 510 and / or the second plate 520 to the first pipe 530, when a negative pressure is formed inside the first pipe 530, since the first pipe 530 is bonded to the first plate 510 and / or the second plate 520, the concave deformation of the first pipe 530 can be effectively reduced, thereby improving the stability and uniformity of the fluid in the first pipe 530 and enhancing the structural strength of the first pipe 530, that is, the thermal management component 50 can effectively absorb the tolerance generated by the battery cell 20 while adjusting the temperature of the battery cell 20, thereby improving the performance of the thermal management component 50.

[0145] In some implementations, the interior of the first conduit 530 is used to contain a fluid to regulate the temperature of the battery cell 20. Thus, in the embodiment of the present application, by using the interior of the first conduit 530 to contain a fluid to regulate the temperature of the battery cell 20, the risk of thermal runaway of the battery cell 20 is reduced, thereby improving the performance of the battery 10.

[0146] In some implementations, the material of the first conduit 530 includes at least one of the following materials: polyphenylene sulfide, polypropylene, polylaurolactam, polyhexamethylene adipamide, and nylon. Thus, in the embodiment of the present application, by configuring the first conduit 530 to be made of at least one of the following materials: polyphenylene sulfide, polypropylene, polylaurolactam, polyhexamethylene adipamide, and nylon, the bending performance of the first conduit 530 can be improved. Furthermore, when the battery 10 is subjected to vibration, impact, or compression, the first conduit 530 can undergo elastic deformation and return to its original state after the external force is removed. In other words, the first conduit 530 can absorb the forces exerted by the battery cells 20 on the thermal management assembly 50, thereby reducing damage to the battery cells 20. In other words, the thermal management assembly 50 can effectively absorb the tolerances of the battery cells 20 while regulating their temperature, thereby improving the performance of the thermal management assembly 50 and, in turn, the performance of the battery 10.

[0147] Referring again to Figures 4 to 9 , a thermal management assembly 50 is provided for regulating the temperature of a battery cell 20. The thermal management assembly 50 includes a first plate 510, a second plate 520, and a first conduit 530. The first plate 510 and the second plate 520 are disposed opposite each other, and the first conduit 530 is disposed between the first plate 510 and the second plate 520. The cross-section of the first conduit 530 perpendicular to the direction in which the first conduit 530 extends comprises an arc. The first conduit 530 includes two first connecting portions 531 disposed opposite each other along a direction perpendicular to the thickness of the thermal management assembly 50. The first connecting portions 531 connect to the first plate 510 and the second plate 520. In a plane perpendicular to the direction in which the first conduit 530 extends, the cross-section of the first connecting portion 531 comprises an arc, with the arc opening facing the interior of the first conduit 530. The first pipe 530 has multiple bends along its extension direction, including a first bend and a second bend. The first bend has a bend direction opposite to that of the second bend. In a first plane perpendicular to the extension direction of the first pipe 530, the first plane intersects the thermal management assembly 50. The first pipe 530 includes multiple first cross-sections on the first plane. The ratio of the distance L1 between any two adjacent first cross-sections to the dimension L2 of the first pipe 530 in the direction perpendicular to the length of the thermal management assembly 50 satisfies the following conditions: 0.1 ≤ L1 / L2 ≤ 0.4, preferably, 0.15 ≤ L1 / L2 ≤ 0.27. Along the thickness direction of the thermal management assembly 50, the ratio of the maximum internal dimension h1 of the first pipe 530 to the distance h2 between the first plate 510 and the second plate 520 satisfies the following conditions: 0.2 ≤ h1 / h2 ≤ 1, preferably, 0.7 ≤ h1 / h2 ≤ 0.88.

[0148] FIG10 shows a schematic structural diagram of a battery 10 provided in another embodiment of the present application.

[0149] The present application also provides a battery comprising a battery cell 20 and a thermal management assembly 50 according to any of the above embodiments, wherein the thermal management assembly 50 is configured to regulate the temperature of the battery cell 20. For example, the battery may be the battery 10 shown in FIG. 2 or FIG. 10 .

[0150] In some implementations, as shown in FIG10 , there are multiple thermal management components 50 , and the multiple thermal management components 50 are arranged at intervals, with the battery cell 20 being arranged between any two adjacent thermal management components 50 .

[0151] It should be understood that in an embodiment of the present application, as shown in Figure 10, the first connectors 541 between two adjacent thermal management components 50 can be connected through a connecting pipe, and the second connectors 542 between the two adjacent thermal management components 50 can be connected through a connecting pipe, and then the connected multiple first connectors 541 or second connectors 542 are connected to an external circulation system to achieve temperature regulation of the battery cells 20 of the battery 10.

[0152] In some implementations, the battery cell 20 is bonded to the thermal management assembly 50. Thus, in the embodiment of the present application, by bonding the battery cell 20 to the thermal management assembly 50, the connection method is simple and reliable, which helps reduce the processing and manufacturing costs of the battery 10.

[0153] The present application also provides an electrical device including the battery 10 of any of the above embodiments, wherein the battery 10 is used to provide power to the electrical device. Specifically, the electrical device may be the vehicle 1 shown in FIG1 , or any electrical device using the battery 10 .

[0154] An embodiment of the present application further provides an energy storage device, comprising the battery 10 in any of the above embodiments, wherein the battery 10 is used to store electrical energy for the energy storage device.

[0155] Although the present application has been described with reference to the above-described embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A thermal management component, characterized in that, For temperature regulation of battery cells, the thermal management component includes: A first plate and a second plate arranged oppositely; A first pipe, the first pipe is arranged between the first plate and the second plate, wherein the shape of the cross-section of the first pipe perpendicular to the extending direction of the first pipe includes an arc.

2. The thermal management component according to claim 1, wherein The first pipe includes: Two first connecting parts arranged oppositely along the direction perpendicular to the thickness direction of the thermal management component, and the first connecting parts are connected to the first plate and the second plate.

3. The thermal management component according to claim 2, characterized in that, On a plane perpendicular to the extending direction of the first pipe, the shape of the cross-section of the first connecting part includes an arc.

4. The thermal management component according to claim 3, wherein The opening of the arc faces the inside of the first pipe.

5. The thermal management component according to any one of claims 2 to 4, characterized in that, The first pipe further includes: Two second connecting parts arranged oppositely along the thickness direction of the thermal management component, and the second connecting parts are connected to the two first connecting parts.

6. The thermal management component according to any one of claims 1 to 5, characterized in that, A clamping space is formed between the first plate and the second plate, the clamping space includes a deformation space and a pipe space occupied by the first pipe, the deformation space is an open space in the clamping space that communicates with the outside of the thermal management component, and the deformation space is used to absorb the acting force of the battery cell on the thermal management component.

7. The thermal management component according to any one of claims 1 to 6, characterized in that, The first pipe is provided with a plurality of bending parts along the extending direction of the first pipe, the plurality of bending parts include a first bending part and a second bending part, and the bending direction of the first bending part is opposite to the bending direction of the second bending part.

8. The thermal management component according to any one of claims 1 to 7, characterized in that, On a first plane perpendicular to the extending direction of the first pipe, the first plane intersects with the thermal management component, the first pipe includes a plurality of first cross-sections on the first plane, and the ratio between the distance L1 between any two adjacent first cross-sections and the dimension L2 of the first pipe in the direction perpendicular to the length direction of the thermal management component satisfies: 0.1 ≤ L1 / L2 ≤ 0.

4.

9. The thermal management component according to claim 8, wherein, On a first plane perpendicular to the extending direction of the first pipe, the first plane intersects with the thermal management component, the first pipe includes a plurality of first cross-sections on the first plane, and the ratio between the distance L1 between any two adjacent first cross-sections and the dimension L2 of the first pipe in the direction perpendicular to the length direction of the thermal management component satisfies: 0.15 ≤ L1 / L2 ≤ 0.

27.

10. The thermal management component according to any one of claims 1 to 9, characterized in that Along the thickness direction of the thermal management component, the ratio between the maximum dimension h1 inside the first pipe and the distance h2 between the first plate and the second plate satisfies: 0.2 ≤ h1 / h2 ≤ 1.

11. The thermal management component according to claim 10, wherein Along the thickness direction of the thermal management component, the ratio between the maximum dimension h1 inside the first pipe and the distance h2 between the first plate and the second plate satisfies: 0.7 ≤ h1 / h2 ≤ 0.

88.

12. The thermal management component according to any one of claims 1 to 11, characterized in that The first plate and / or the second plate are adhesively connected to the first pipe.

13. The thermal management component according to any one of claims 1 to 12, characterized in that The inside of the first pipe is used to accommodate a fluid to regulate the temperature of the battery cell.

14. The thermal management component according to any one of claims 1 to 13, characterized in that The material of the first pipe includes at least one of the following materials: polyphenylene sulfide, polypropylene, polycaprolactam, polyhexamethylene adipamide, nylon.

15. A battery, characterized in that, Including: Battery cell; The thermal management component according to any one of claims 1 to 14, wherein the thermal management component is used to regulate the temperature of the battery cell.

16. The battery according to claim 15, wherein, The number of the thermal management components is multiple, and the multiple thermal management components are arranged at intervals, and the battery cell is arranged between any two adjacent thermal management components.

17. The battery according to claim 15 or 16, characterized in that, The battery cell is adhesively connected to the thermal management component.

18. An electrical device, characterized in that, Comprising: The battery according to any one of claims 15 to 17, wherein the battery is used to provide electrical energy for the electrical equipment.

19. An energy storage device, characterized in that, Comprising: The battery according to any one of claims 15 to 17, wherein the battery is used to store electrical energy for the energy storage device.

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